X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=po-docs%2Flibguestfs-docs.pot;h=837e525ed56ea18834428c684df6b4e3b40014f0;hp=0a533b60610c3ba82a2e94d988e4e17932a53179;hb=refs%2Ftags%2F1.9.8;hpb=f6fda69953ca110104481f1263ec9a96e74dbb88 diff --git a/po-docs/libguestfs-docs.pot b/po-docs/libguestfs-docs.pot index 0a533b6..837e525 100644 --- a/po-docs/libguestfs-docs.pot +++ b/po-docs/libguestfs-docs.pot @@ -6,37 +6,33 @@ #, fuzzy msgid "" msgstr "" -"Project-Id-Version: libguestfs 1.5.18\n" +"Project-Id-Version: libguestfs 1.9.8\n" "Report-Msgid-Bugs-To: libguestfs@redhat.com\n" -"POT-Creation-Date: 2010-09-22 14:58+0200\n" +"POT-Creation-Date: 2011-02-06 17:14+0000\n" "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" "Last-Translator: FULL NAME \n" "Language-Team: LANGUAGE \n" +"Language: \n" "MIME-Version: 1.0\n" -"Content-Type: text/plain; charset=utf-8\n" -"Content-Transfer-Encoding: ENCODING" +"Content-Type: text/plain; charset=UTF-8\n" +"Content-Transfer-Encoding: 8bit\n" -# type: =encoding -#: ../src/guestfs.pod:1 ../fish/guestfish.pod:1 ../test-tool/libguestfs-test-tool.pod:1 ../fuse/guestmount.pod:1 ../inspector/virt-inspector.pl:36 ../tools/virt-cat.pl:30 ../tools/virt-df.pl:32 ../tools/virt-edit.pl:31 ../tools/virt-list-filesystems.pl:28 ../tools/virt-list-partitions.pl:28 ../tools/virt-ls.pl:31 ../tools/virt-make-fs.pl:33 ../tools/virt-rescue.pl:29 ../tools/virt-resize.pl:38 ../tools/virt-tar.pl:30 ../tools/virt-win-reg.pl:34 -msgid "utf8" -msgstr "" - -# type: =head1 -#: ../src/guestfs.pod:3 ../fish/guestfish.pod:3 ../test-tool/libguestfs-test-tool.pod:3 ../fuse/guestmount.pod:3 ../inspector/virt-inspector.pl:38 ../tools/virt-cat.pl:32 ../tools/virt-df.pl:34 ../tools/virt-edit.pl:33 ../tools/virt-list-filesystems.pl:30 ../tools/virt-list-partitions.pl:30 ../tools/virt-ls.pl:33 ../tools/virt-make-fs.pl:35 ../tools/virt-rescue.pl:31 ../tools/virt-resize.pl:40 ../tools/virt-tar.pl:32 ../tools/virt-win-reg.pl:36 +#. type: =head1 +#: ../src/guestfs.pod:3 ../fish/guestfish.pod:3 ../test-tool/libguestfs-test-tool.pod:3 ../fuse/guestmount.pod:3 ../tools/virt-edit.pl:32 ../tools/virt-win-reg.pl:35 ../tools/virt-resize.pl:40 ../tools/virt-list-filesystems.pl:30 ../tools/virt-tar.pl:31 ../tools/virt-make-fs.pl:35 ../tools/virt-list-partitions.pl:30 msgid "NAME" msgstr "" -# type: textblock +#. type: textblock #: ../src/guestfs.pod:5 msgid "guestfs - Library for accessing and modifying virtual machine images" msgstr "" -# type: =head1 -#: ../src/guestfs.pod:7 ../fish/guestfish.pod:7 ../test-tool/libguestfs-test-tool.pod:7 ../fuse/guestmount.pod:7 ../inspector/virt-inspector.pl:42 ../tools/virt-cat.pl:36 ../tools/virt-df.pl:38 ../tools/virt-edit.pl:37 ../tools/virt-list-filesystems.pl:34 ../tools/virt-list-partitions.pl:34 ../tools/virt-ls.pl:37 ../tools/virt-make-fs.pl:39 ../tools/virt-rescue.pl:35 ../tools/virt-resize.pl:44 ../tools/virt-tar.pl:36 ../tools/virt-win-reg.pl:40 +#. type: =head1 +#: ../src/guestfs.pod:7 ../fish/guestfish.pod:7 ../test-tool/libguestfs-test-tool.pod:7 ../fuse/guestmount.pod:7 ../tools/virt-edit.pl:36 ../tools/virt-win-reg.pl:39 ../tools/virt-resize.pl:44 ../tools/virt-list-filesystems.pl:34 ../tools/virt-tar.pl:35 ../tools/virt-make-fs.pl:39 ../tools/virt-list-partitions.pl:34 msgid "SYNOPSIS" msgstr "" -# type: verbatim +#. type: verbatim #: ../src/guestfs.pod:9 #, no-wrap msgid "" @@ -44,7 +40,7 @@ msgid "" " \n" msgstr "" -# type: verbatim +#. type: verbatim #: ../src/guestfs.pod:11 #, no-wrap msgid "" @@ -54,13 +50,12 @@ msgid "" " guestfs_mount (g, \"/dev/sda1\", \"/\");\n" " guestfs_touch (g, \"/hello\");\n" " guestfs_umount (g, \"/\");\n" -" guestfs_sync (g);\n" " guestfs_close (g);\n" "\n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:20 +#. type: verbatim +#: ../src/guestfs.pod:19 #, no-wrap msgid "" " cc prog.c -o prog -lguestfs\n" @@ -69,13 +64,13 @@ msgid "" "\n" msgstr "" -# type: =head1 -#: ../src/guestfs.pod:24 ../fish/guestfish.pod:115 ../test-tool/libguestfs-test-tool.pod:11 ../fuse/guestmount.pod:16 ../inspector/virt-inspector.pl:48 ../tools/virt-cat.pl:42 ../tools/virt-df.pl:46 ../tools/virt-edit.pl:51 ../tools/virt-list-filesystems.pl:40 ../tools/virt-list-partitions.pl:40 ../tools/virt-ls.pl:43 ../tools/virt-make-fs.pl:47 ../tools/virt-rescue.pl:51 ../tools/virt-resize.pl:50 ../tools/virt-tar.pl:73 ../tools/virt-win-reg.pl:64 +#. type: =head1 +#: ../src/guestfs.pod:23 ../fish/guestfish.pod:30 ../test-tool/libguestfs-test-tool.pod:11 ../fuse/guestmount.pod:20 ../tools/virt-edit.pl:50 ../tools/virt-win-reg.pl:63 ../tools/virt-resize.pl:50 ../tools/virt-list-filesystems.pl:40 ../tools/virt-tar.pl:77 ../tools/virt-make-fs.pl:47 ../tools/virt-list-partitions.pl:40 msgid "DESCRIPTION" msgstr "" -# type: textblock -#: ../src/guestfs.pod:26 +#. type: textblock +#: ../src/guestfs.pod:25 msgid "" "Libguestfs is a library for accessing and modifying guest disk images. " "Amongst the things this is good for: making batch configuration changes to " @@ -85,8 +80,8 @@ msgid "" "registry/UUID/hostname info, and much else besides." msgstr "" -# type: textblock -#: ../src/guestfs.pod:34 +#. type: textblock +#: ../src/guestfs.pod:33 msgid "" "Libguestfs uses Linux kernel and qemu code, and can access any type of guest " "filesystem that Linux and qemu can, including but not limited to: ext2/3/4, " @@ -94,16 +89,16 @@ msgid "" "qcow2, vmdk." msgstr "" -# type: textblock -#: ../src/guestfs.pod:39 +#. type: textblock +#: ../src/guestfs.pod:38 msgid "" "Libguestfs provides ways to enumerate guest storage (eg. partitions, LVs, " "what filesystem is in each LV, etc.). It can also run commands in the " "context of the guest. Also you can access filesystems over FUSE." msgstr "" -# type: textblock -#: ../src/guestfs.pod:44 +#. type: textblock +#: ../src/guestfs.pod:43 msgid "" "Libguestfs is a library that can be linked with C and C++ management " "programs (or management programs written in OCaml, Perl, Python, Ruby, Java, " @@ -111,40 +106,47 @@ msgid "" "line." msgstr "" -# type: textblock -#: ../src/guestfs.pod:49 +#. type: textblock +#: ../src/guestfs.pod:48 msgid "" "You don't need to be root to use libguestfs, although obviously you do need " "enough permissions to access the disk images." msgstr "" -# type: textblock -#: ../src/guestfs.pod:52 +#. type: textblock +#: ../src/guestfs.pod:51 msgid "" "Libguestfs is a large API because it can do many things. For a gentle " "introduction, please read the L section next." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:55 -msgid "API OVERVIEW" +#. type: textblock +#: ../src/guestfs.pod:54 +msgid "" +"There are also some example programs in the L manual " +"page." msgstr "" -# type: textblock +#. type: =head1 #: ../src/guestfs.pod:57 +msgid "API OVERVIEW" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:59 msgid "" "This section provides a gentler overview of the libguestfs API. We also try " "to group API calls together, where that may not be obvious from reading " "about the individual calls in the main section of this manual." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:62 +#. type: =head2 +#: ../src/guestfs.pod:64 msgid "HANDLES" msgstr "" -# type: textblock -#: ../src/guestfs.pod:64 +#. type: textblock +#: ../src/guestfs.pod:66 msgid "" "Before you can use libguestfs calls, you have to create a handle. Then you " "must add at least one disk image to the handle, followed by launching the " @@ -153,21 +155,21 @@ msgid "" "handle variable, although of course you can use any name you want." msgstr "" -# type: textblock -#: ../src/guestfs.pod:71 +#. type: textblock +#: ../src/guestfs.pod:73 msgid "The general structure of all libguestfs-using programs looks like this:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:74 +#. type: verbatim +#: ../src/guestfs.pod:76 #, no-wrap msgid "" " guestfs_h *g = guestfs_create ();\n" " \n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:76 +#. type: verbatim +#: ../src/guestfs.pod:78 #, no-wrap msgid "" " /* Call guestfs_add_drive additional times if there are\n" @@ -177,8 +179,8 @@ msgid "" " \n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:81 +#. type: verbatim +#: ../src/guestfs.pod:83 #, no-wrap msgid "" " /* Most manipulation calls won't work until you've launched\n" @@ -189,8 +191,8 @@ msgid "" " \n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:87 +#. type: verbatim +#: ../src/guestfs.pod:89 #, no-wrap msgid "" " /* Now you can examine what partitions, LVs etc are available.\n" @@ -200,8 +202,8 @@ msgid "" " \n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:92 +#. type: verbatim +#: ../src/guestfs.pod:94 #, no-wrap msgid "" " /* To access a filesystem in the image, you must mount it.\n" @@ -210,32 +212,31 @@ msgid "" " \n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:96 +#. type: verbatim +#: ../src/guestfs.pod:98 #, no-wrap msgid "" " /* Now you can perform filesystem actions on the guest\n" " * disk image.\n" " */\n" " guestfs_touch (g, \"/hello\");\n" -" \n" +"\n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:101 +#. type: verbatim +#: ../src/guestfs.pod:103 #, no-wrap msgid "" -" /* You only need to call guestfs_sync if you have made\n" -" * changes to the guest image. (But if you've made changes\n" -" * then you *must* sync). See also: guestfs_umount and\n" -" * guestfs_umount_all calls.\n" +" /* This is only needed for libguestfs < 1.5.24. Since then\n" +" * it is done automatically when you close the handle. See\n" +" * discussion of autosync in this page.\n" " */\n" " guestfs_sync (g);\n" " \n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:108 +#. type: verbatim +#: ../src/guestfs.pod:109 #, no-wrap msgid "" " /* Close the handle 'g'. */\n" @@ -243,24 +244,25 @@ msgid "" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:111 +#. type: textblock +#: ../src/guestfs.pod:112 msgid "" "The code above doesn't include any error checking. In real code you should " "check return values carefully for errors. In general all functions that " "return integers return C<-1> on error, and all functions that return " "pointers return C on error. See section L below for " "how to handle errors, and consult the documentation for each function call " -"below to see precisely how they return error indications." +"below to see precisely how they return error indications. See " +"L for fully worked examples." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:119 +#. type: =head2 +#: ../src/guestfs.pod:121 msgid "DISK IMAGES" msgstr "" -# type: textblock -#: ../src/guestfs.pod:121 +#. type: textblock +#: ../src/guestfs.pod:123 msgid "" "The image filename (C<\"guest.img\"> in the example above) could be a disk " "image from a virtual machine, a L copy of a physical hard disk, an " @@ -269,95 +271,137 @@ msgid "" "of these." msgstr "" -# type: textblock -#: ../src/guestfs.pod:127 +#. type: textblock +#: ../src/guestfs.pod:129 +msgid "" +"The call you should use in modern code for adding drives is " +"L. To add a disk image, allowing writes, and " +"specifying that the format is raw, do:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:133 +#, no-wrap +msgid "" +" guestfs_add_drive_opts (g, filename,\n" +" GUESTFS_ADD_DRIVE_OPTS_FORMAT, \"raw\",\n" +" -1);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:137 +msgid "You can add a disk read-only using:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:139 +#, no-wrap +msgid "" +" guestfs_add_drive_opts (g, filename,\n" +" GUESTFS_ADD_DRIVE_OPTS_FORMAT, \"raw\",\n" +" GUESTFS_ADD_DRIVE_OPTS_READONLY, 1,\n" +" -1);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:144 msgid "" -"You can add a disk read-only using L, in which case " +"or by calling the older function L. In either case " "libguestfs won't modify the file." msgstr "" -# type: textblock -#: ../src/guestfs.pod:130 +#. type: textblock +#: ../src/guestfs.pod:147 msgid "" "Be extremely cautious if the disk image is in use, eg. if it is being used " "by a virtual machine. Adding it read-write will almost certainly cause disk " "corruption, but adding it read-only is safe." msgstr "" -# type: textblock -#: ../src/guestfs.pod:134 +#. type: textblock +#: ../src/guestfs.pod:151 msgid "" "You must add at least one disk image, and you may add multiple disk images. " "In the API, the disk images are usually referred to as C (for the " "first one you added), C (for the second one you added), etc." msgstr "" -# type: textblock -#: ../src/guestfs.pod:139 +#. type: textblock +#: ../src/guestfs.pod:156 msgid "" "Once L has been called you cannot add any more images. You " "can call L to get a list of the device names, in the " "order that you added them. See also L below." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:144 +#. type: =head2 +#: ../src/guestfs.pod:161 msgid "MOUNTING" msgstr "" -# type: textblock -#: ../src/guestfs.pod:146 +#. type: textblock +#: ../src/guestfs.pod:163 msgid "" "Before you can read or write files, create directories and so on in a disk " "image that contains filesystems, you have to mount those filesystems using " -"L. If you already know that a disk image contains (for " -"example) one partition with a filesystem on that partition, then you can " -"mount it directly:" +"L or L. If you already know that " +"a disk image contains (for example) one partition with a filesystem on that " +"partition, then you can mount it directly:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:152 +#. type: verbatim +#: ../src/guestfs.pod:170 #, no-wrap msgid "" -" guestfs_mount (g, \"/dev/sda1\", \"/\");\n" +" guestfs_mount_options (g, \"\", \"/dev/sda1\", \"/\");\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:154 +#. type: textblock +#: ../src/guestfs.pod:172 msgid "" "where C means literally the first partition (C<1>) of the first " "disk image that we added (C). If the disk contains Linux LVM2 " -"logical volumes you could refer to those instead (eg. C)." +"logical volumes you could refer to those instead (eg. C). Note " +"that these are libguestfs virtual devices, and are nothing to do with host " +"devices." msgstr "" -# type: textblock -#: ../src/guestfs.pod:158 +#. type: textblock +#: ../src/guestfs.pod:178 msgid "" "If you are given a disk image and you don't know what it contains then you " "have to find out. Libguestfs can do that too: use " "L and L to list possible partitions " "and LVs, and either try mounting each to see what is mountable, or else " -"examine them with L or L. Libguestfs also " -"has a set of APIs for inspection of disk images (see L below). " -"But you might find it easier to look at higher level programs built on top " -"of libguestfs, in particular L." +"examine them with L or L. To list just " +"filesystems, use L." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:186 +msgid "" +"Libguestfs also has a set of APIs for inspection of unknown disk images (see " +"L below). But you might find it easier to look at higher level " +"programs built on top of libguestfs, in particular L." msgstr "" -# type: textblock -#: ../src/guestfs.pod:168 +#. type: textblock +#: ../src/guestfs.pod:191 msgid "" -"To mount a disk image read-only, use L. There are " +"To mount a filesystem read-only, use L. There are " "several other variations of the C call." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:171 +#. type: =head2 +#: ../src/guestfs.pod:194 msgid "FILESYSTEM ACCESS AND MODIFICATION" msgstr "" -# type: textblock -#: ../src/guestfs.pod:173 +#. type: textblock +#: ../src/guestfs.pod:196 msgid "" "The majority of the libguestfs API consists of fairly low-level calls for " "accessing and modifying the files, directories, symlinks etc on mounted " @@ -366,58 +410,58 @@ msgid "" "all in this overview." msgstr "" -# type: textblock -#: ../src/guestfs.pod:179 +#. type: textblock +#: ../src/guestfs.pod:202 msgid "" "Specify filenames as full paths, starting with C<\"/\"> and including the " "mount point." msgstr "" -# type: textblock -#: ../src/guestfs.pod:182 +#. type: textblock +#: ../src/guestfs.pod:205 msgid "" "For example, if you mounted a filesystem at C<\"/\"> and you want to read " "the file called C<\"etc/passwd\"> then you could do:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:185 +#. type: verbatim +#: ../src/guestfs.pod:208 #, no-wrap msgid "" " char *data = guestfs_cat (g, \"/etc/passwd\");\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:187 +#. type: textblock +#: ../src/guestfs.pod:210 msgid "" "This would return C as a newly allocated buffer containing the full " "content of that file (with some conditions: see also L below), " "or C if there was an error." msgstr "" -# type: textblock -#: ../src/guestfs.pod:191 +#. type: textblock +#: ../src/guestfs.pod:214 msgid "" "As another example, to create a top-level directory on that filesystem " "called C<\"var\"> you would do:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:194 +#. type: verbatim +#: ../src/guestfs.pod:217 #, no-wrap msgid "" " guestfs_mkdir (g, \"/var\");\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:196 +#. type: textblock +#: ../src/guestfs.pod:219 msgid "To create a symlink you could do:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:198 +#. type: verbatim +#: ../src/guestfs.pod:221 #, no-wrap msgid "" " guestfs_ln_s (g, \"/etc/init.d/portmap\",\n" @@ -425,15 +469,15 @@ msgid "" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:201 +#. type: textblock +#: ../src/guestfs.pod:224 msgid "" "Libguestfs will reject attempts to use relative paths and there is no " "concept of a current working directory." msgstr "" -# type: textblock -#: ../src/guestfs.pod:204 +#. type: textblock +#: ../src/guestfs.pod:227 msgid "" "Libguestfs can return errors in many situations: for example if the " "filesystem isn't writable, or if a file or directory that you requested " @@ -442,34 +486,34 @@ msgid "" "turn these errors into exceptions)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:210 +#. type: textblock +#: ../src/guestfs.pod:233 msgid "" "File writes are affected by the per-handle umask, set by calling " "L and defaulting to 022. See L." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:213 +#. type: =head2 +#: ../src/guestfs.pod:236 msgid "PARTITIONING" msgstr "" -# type: textblock -#: ../src/guestfs.pod:215 +#. type: textblock +#: ../src/guestfs.pod:238 msgid "" "Libguestfs contains API calls to read, create and modify partition tables on " "disk images." msgstr "" -# type: textblock -#: ../src/guestfs.pod:218 +#. type: textblock +#: ../src/guestfs.pod:241 msgid "" "In the common case where you want to create a single partition covering the " "whole disk, you should use the L call:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:222 +#. type: verbatim +#: ../src/guestfs.pod:245 #, no-wrap msgid "" " const char *parttype = \"mbr\";\n" @@ -479,20 +523,20 @@ msgid "" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:227 +#. type: textblock +#: ../src/guestfs.pod:250 msgid "" "Obviously this effectively wipes anything that was on that disk image " "before." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:230 +#. type: =head2 +#: ../src/guestfs.pod:253 msgid "LVM2" msgstr "" -# type: textblock -#: ../src/guestfs.pod:232 +#. type: textblock +#: ../src/guestfs.pod:255 msgid "" "Libguestfs provides access to a large part of the LVM2 API, such as " "L and L. It won't make much sense " @@ -500,60 +544,60 @@ msgid "" "volume groups and logical volumes." msgstr "" -# type: textblock -#: ../src/guestfs.pod:237 +#. type: textblock +#: ../src/guestfs.pod:260 msgid "" "This author strongly recommends reading the LVM HOWTO, online at " "L." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:240 +#. type: =head2 +#: ../src/guestfs.pod:263 msgid "DOWNLOADING" msgstr "" -# type: textblock -#: ../src/guestfs.pod:242 +#. type: textblock +#: ../src/guestfs.pod:265 msgid "" "Use L to download small, text only files. This call is " "limited to files which are less than 2 MB and which cannot contain any ASCII " -"NUL (C<\\0>) characters. However it has a very simple to use API." +"NUL (C<\\0>) characters. However the API is very simple to use." msgstr "" -# type: textblock -#: ../src/guestfs.pod:247 +#. type: textblock +#: ../src/guestfs.pod:269 msgid "" "L can be used to read files which contain arbitrary 8 " "bit data, since it returns a (pointer, size) pair. However it is still " "limited to \"small\" files, less than 2 MB." msgstr "" -# type: textblock -#: ../src/guestfs.pod:251 +#. type: textblock +#: ../src/guestfs.pod:273 msgid "" "L can be used to download any file, with no limits on " "content or size (even files larger than 4 GB)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:254 +#. type: textblock +#: ../src/guestfs.pod:276 msgid "To download multiple files, see L and L." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:257 +#. type: =head2 +#: ../src/guestfs.pod:279 msgid "UPLOADING" msgstr "" -# type: textblock -#: ../src/guestfs.pod:259 +#. type: textblock +#: ../src/guestfs.pod:281 msgid "" "It's often the case that you want to write a file or files to the disk " "image." msgstr "" -# type: textblock -#: ../src/guestfs.pod:262 +#. type: textblock +#: ../src/guestfs.pod:284 msgid "" "To write a small file with fixed content, use L. To create " "a file of all zeroes, use L (sparse) or " @@ -562,20 +606,20 @@ msgid "" "L and L." msgstr "" -# type: textblock -#: ../src/guestfs.pod:268 +#. type: textblock +#: ../src/guestfs.pod:290 msgid "" "To upload a single file, use L. This call has no limits on " "file content or size (even files larger than 4 GB)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:271 +#. type: textblock +#: ../src/guestfs.pod:293 msgid "To upload multiple files, see L and L." msgstr "" -# type: textblock -#: ../src/guestfs.pod:273 +#. type: textblock +#: ../src/guestfs.pod:295 msgid "" "However the fastest way to upload I is to " "turn them into a squashfs or CD ISO (see L and " @@ -588,205 +632,271 @@ msgid "" "using a label or UUID, use an ISO image instead." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:284 +#. type: =head2 +#: ../src/guestfs.pod:306 msgid "COPYING" msgstr "" -# type: textblock -#: ../src/guestfs.pod:286 +#. type: textblock +#: ../src/guestfs.pod:308 msgid "" "There are various different commands for copying between files and devices " "and in and out of the guest filesystem. These are summarised in the table " "below." msgstr "" -# type: =item -#: ../src/guestfs.pod:292 +#. type: =item +#: ../src/guestfs.pod:314 msgid "B to B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:294 +#. type: textblock +#: ../src/guestfs.pod:316 msgid "" "Use L to copy a single file, or L to copy " "directories recursively." msgstr "" -# type: =item -#: ../src/guestfs.pod:297 +#. type: =item +#: ../src/guestfs.pod:319 msgid "B to B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:299 +#. type: textblock +#: ../src/guestfs.pod:321 msgid "" "Use L which efficiently uses L to copy between files and " "devices in the guest." msgstr "" -# type: textblock -#: ../src/guestfs.pod:302 +#. type: textblock +#: ../src/guestfs.pod:324 msgid "Example: duplicate the contents of an LV:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:304 +#. type: verbatim +#: ../src/guestfs.pod:326 #, no-wrap msgid "" " guestfs_dd (g, \"/dev/VG/Original\", \"/dev/VG/Copy\");\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:306 +#. type: textblock +#: ../src/guestfs.pod:328 msgid "" "The destination (C) must be at least as large as the source " "(C). To copy less than the whole source device, use " "L." msgstr "" -# type: =item -#: ../src/guestfs.pod:310 +#. type: =item +#: ../src/guestfs.pod:332 msgid "B to B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:312 +#. type: textblock +#: ../src/guestfs.pod:334 msgid "Use L. See L above." msgstr "" -# type: =item -#: ../src/guestfs.pod:314 +#. type: =item +#: ../src/guestfs.pod:336 msgid "B to B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:316 +#. type: textblock +#: ../src/guestfs.pod:338 msgid "Use L. See L above." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:320 +#. type: =head2 +#: ../src/guestfs.pod:342 +msgid "UPLOADING AND DOWNLOADING TO PIPES AND FILE DESCRIPTORS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:344 +msgid "" +"Calls like L, L, L, " +"L etc appear to only take filenames as arguments, so it " +"appears you can only upload and download to files. However many Un*x-like " +"hosts let you use the special device files C, C, " +"C and C to read and write from stdin, stdout, " +"stderr, and arbitrary file descriptor N." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:352 +msgid "For example, L writes its output to stdout by doing:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:355 +#, no-wrap +msgid "" +" guestfs_download (g, filename, \"/dev/stdout\");\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:357 +msgid "and you can write tar output to a pipe C by doing:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:359 +#, no-wrap +msgid "" +" char devfd[64];\n" +" snprintf (devfd, sizeof devfd, \"/dev/fd/%d\", fd);\n" +" guestfs_tar_out (g, \"/\", devfd);\n" +"\n" +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:363 msgid "LISTING FILES" msgstr "" -# type: textblock -#: ../src/guestfs.pod:322 +#. type: textblock +#: ../src/guestfs.pod:365 msgid "" "L is just designed for humans to read (mainly when using the " "L-equivalent command C)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:325 +#. type: textblock +#: ../src/guestfs.pod:368 msgid "" "L is a quick way to get a list of files in a directory from " "programs, as a flat list of strings." msgstr "" -# type: textblock -#: ../src/guestfs.pod:328 +#. type: textblock +#: ../src/guestfs.pod:371 msgid "" "L is a programmatic way to get a list of files in a " "directory, plus additional information about each one. It is more " "equivalent to using the L call on a local filesystem." msgstr "" -# type: textblock -#: ../src/guestfs.pod:332 +#. type: textblock +#: ../src/guestfs.pod:375 msgid "" "L and L can be used to recursively list " "files." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:335 +#. type: =head2 +#: ../src/guestfs.pod:378 msgid "RUNNING COMMANDS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:337 +#. type: textblock +#: ../src/guestfs.pod:380 msgid "" "Although libguestfs is primarily an API for manipulating files inside guest " "images, we also provide some limited facilities for running commands inside " "guests." msgstr "" -# type: textblock -#: ../src/guestfs.pod:341 +#. type: textblock +#: ../src/guestfs.pod:384 msgid "There are many limitations to this:" msgstr "" -# type: =item -#: ../src/guestfs.pod:345 ../src/guestfs.pod:350 ../src/guestfs.pod:355 ../src/guestfs.pod:359 ../src/guestfs.pod:364 ../src/guestfs.pod:368 ../src/guestfs.pod:373 ../src/guestfs.pod:1223 ../src/guestfs.pod:1228 ../src/guestfs.pod:1232 ../src/guestfs.pod:1334 ../src/guestfs.pod:1338 ../src/guestfs.pod:1342 ../src/guestfs.pod:1347 ../src/guestfs.pod:1355 ../src/guestfs.pod:1374 ../src/guestfs.pod:1382 ../src/guestfs.pod:1612 ../src/guestfs.pod:1618 ../src/guestfs.pod:1623 ../src/guestfs.pod:1629 ../src/guestfs.pod:1736 ../src/guestfs.pod:1740 ../src/guestfs.pod:1744 ../src/guestfs.pod:1748 ../src/guestfs-actions.pod:14 ../src/guestfs-actions.pod:21 ../src/guestfs-actions.pod:372 ../src/guestfs-actions.pod:380 ../src/guestfs-actions.pod:387 ../src/guestfs-actions.pod:394 ../src/guestfs-actions.pod:1285 ../src/guestfs-actions.pod:1289 ../src/guestfs-actions.pod:1293 ../src/guestfs-actions.pod:1297 ../src/guestfs-actions.pod:1305 ../src/guestfs-actions.pod:1309 ../src/guestfs-actions.pod:1313 ../src/guestfs-actions.pod:1323 ../src/guestfs-actions.pod:1327 ../src/guestfs-actions.pod:1331 ../src/guestfs-actions.pod:1454 ../src/guestfs-actions.pod:1458 ../src/guestfs-actions.pod:1463 ../src/guestfs-actions.pod:1468 ../src/guestfs-actions.pod:1520 ../src/guestfs-actions.pod:1524 ../src/guestfs-actions.pod:1529 ../fish/guestfish.pod:316 ../fish/guestfish.pod:320 ../fish/guestfish.pod:324 ../fish/guestfish.pod:328 ../fish/guestfish-actions.pod:15 ../fish/guestfish-actions.pod:22 ../fish/guestfish-actions.pod:306 ../fish/guestfish-actions.pod:314 ../fish/guestfish-actions.pod:321 ../fish/guestfish-actions.pod:328 ../fish/guestfish-actions.pod:1023 ../fish/guestfish-actions.pod:1027 ../fish/guestfish-actions.pod:1031 ../fish/guestfish-actions.pod:1035 ../fish/guestfish-actions.pod:1043 ../fish/guestfish-actions.pod:1047 ../fish/guestfish-actions.pod:1051 ../fish/guestfish-actions.pod:1061 ../fish/guestfish-actions.pod:1065 ../fish/guestfish-actions.pod:1069 ../fish/guestfish-actions.pod:1159 ../fish/guestfish-actions.pod:1163 ../fish/guestfish-actions.pod:1168 ../fish/guestfish-actions.pod:1173 ../fish/guestfish-actions.pod:1215 ../fish/guestfish-actions.pod:1219 ../fish/guestfish-actions.pod:1224 ../tools/virt-df.pl:144 ../tools/virt-df.pl:150 ../tools/virt-resize.pl:324 ../tools/virt-resize.pl:329 ../tools/virt-resize.pl:339 +#. type: =item +#: ../src/guestfs.pod:388 ../src/guestfs.pod:393 ../src/guestfs.pod:398 ../src/guestfs.pod:402 ../src/guestfs.pod:407 ../src/guestfs.pod:411 ../src/guestfs.pod:416 ../src/guestfs.pod:421 ../src/guestfs.pod:1088 ../src/guestfs.pod:1092 ../src/guestfs.pod:1096 ../src/guestfs.pod:1101 ../src/guestfs.pod:1109 ../src/guestfs.pod:1128 ../src/guestfs.pod:1136 ../src/guestfs.pod:1158 ../src/guestfs.pod:1162 ../src/guestfs.pod:1166 ../src/guestfs.pod:1170 ../src/guestfs.pod:1174 ../src/guestfs.pod:1178 ../src/guestfs.pod:1660 ../src/guestfs.pod:1665 ../src/guestfs.pod:1669 ../src/guestfs.pod:1779 ../src/guestfs.pod:1784 ../src/guestfs.pod:1788 ../src/guestfs.pod:2140 ../src/guestfs.pod:2146 ../src/guestfs.pod:2151 ../src/guestfs.pod:2157 ../src/guestfs.pod:2622 ../src/guestfs.pod:2626 ../src/guestfs.pod:2630 ../src/guestfs.pod:2634 ../src/guestfs-actions.pod:15 ../src/guestfs-actions.pod:22 ../src/guestfs-actions.pod:577 ../src/guestfs-actions.pod:585 ../src/guestfs-actions.pod:592 ../src/guestfs-actions.pod:599 ../src/guestfs-actions.pod:1595 ../src/guestfs-actions.pod:1599 ../src/guestfs-actions.pod:1603 ../src/guestfs-actions.pod:1607 ../src/guestfs-actions.pod:1615 ../src/guestfs-actions.pod:1619 ../src/guestfs-actions.pod:1623 ../src/guestfs-actions.pod:1633 ../src/guestfs-actions.pod:1637 ../src/guestfs-actions.pod:1641 ../src/guestfs-actions.pod:1779 ../src/guestfs-actions.pod:1783 ../src/guestfs-actions.pod:1788 ../src/guestfs-actions.pod:1793 ../src/guestfs-actions.pod:1854 ../src/guestfs-actions.pod:1858 ../src/guestfs-actions.pod:1863 ../fish/guestfish.pod:432 ../fish/guestfish.pod:436 ../fish/guestfish.pod:440 ../fish/guestfish.pod:444 ../fish/guestfish-actions.pod:13 ../fish/guestfish-actions.pod:20 ../fish/guestfish-actions.pod:380 ../fish/guestfish-actions.pod:388 ../fish/guestfish-actions.pod:395 ../fish/guestfish-actions.pod:402 ../fish/guestfish-actions.pod:1072 ../fish/guestfish-actions.pod:1076 ../fish/guestfish-actions.pod:1080 ../fish/guestfish-actions.pod:1084 ../fish/guestfish-actions.pod:1092 ../fish/guestfish-actions.pod:1096 ../fish/guestfish-actions.pod:1100 ../fish/guestfish-actions.pod:1110 ../fish/guestfish-actions.pod:1114 ../fish/guestfish-actions.pod:1118 ../fish/guestfish-actions.pod:1208 ../fish/guestfish-actions.pod:1212 ../fish/guestfish-actions.pod:1217 ../fish/guestfish-actions.pod:1222 ../fish/guestfish-actions.pod:1264 ../fish/guestfish-actions.pod:1268 ../fish/guestfish-actions.pod:1273 ../tools/virt-win-reg.pl:536 ../tools/virt-win-reg.pl:542 ../tools/virt-win-reg.pl:548 ../tools/virt-resize.pl:345 ../tools/virt-resize.pl:350 ../tools/virt-resize.pl:360 msgid "*" msgstr "" -# type: textblock -#: ../src/guestfs.pod:347 +#. type: textblock +#: ../src/guestfs.pod:390 msgid "" "The kernel version that the command runs under will be different from what " "it expects." msgstr "" -# type: textblock -#: ../src/guestfs.pod:352 +#. type: textblock +#: ../src/guestfs.pod:395 msgid "" "If the command needs to communicate with daemons, then most likely they " "won't be running." msgstr "" -# type: textblock -#: ../src/guestfs.pod:357 +#. type: textblock +#: ../src/guestfs.pod:400 msgid "The command will be running in limited memory." msgstr "" -# type: textblock -#: ../src/guestfs.pod:361 +#. type: textblock +#: ../src/guestfs.pod:404 msgid "" "The network may not be available unless you enable it (see " "L)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:366 +#. type: textblock +#: ../src/guestfs.pod:409 msgid "Only supports Linux guests (not Windows, BSD, etc)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:370 +#. type: textblock +#: ../src/guestfs.pod:413 msgid "Architecture limitations (eg. won't work for a PPC guest on an X86 host)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:375 +#. type: textblock +#: ../src/guestfs.pod:418 msgid "" "For SELinux guests, you may need to enable SELinux and load policy first. " "See L in this manpage." msgstr "" -# type: textblock -#: ../src/guestfs.pod:380 +#. type: textblock +#: ../src/guestfs.pod:423 +msgid "" +"I It is not safe to run commands from untrusted, possibly " +"malicious guests. These commands may attempt to exploit your program by " +"sending unexpected output. They could also try to exploit the Linux kernel " +"or qemu provided by the libguestfs appliance. They could use the network " +"provided by the libguestfs appliance to bypass ordinary network partitions " +"and firewalls. They could use the elevated privileges or different SELinux " +"context of your program to their advantage." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:432 +msgid "" +"A secure alternative is to use libguestfs to install a \"firstboot\" script " +"(a script which runs when the guest next boots normally), and to have this " +"script run the commands you want in the normal context of the running guest, " +"network security and so on. For information about other security issues, " +"see L." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:440 msgid "" "The two main API calls to run commands are L and " "L (there are also variations)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:383 +#. type: textblock +#: ../src/guestfs.pod:443 msgid "" "The difference is that L runs commands using the shell, so any " "shell globs, redirections, etc will work." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:386 +#. type: =head2 +#: ../src/guestfs.pod:446 msgid "CONFIGURATION FILES" msgstr "" -# type: textblock -#: ../src/guestfs.pod:388 +#. type: textblock +#: ../src/guestfs.pod:448 msgid "" "To read and write configuration files in Linux guest filesystems, we " "strongly recommend using Augeas. For example, Augeas understands how to " @@ -794,118 +904,118 @@ msgid "" "file, and so avoids you having to write that code." msgstr "" -# type: textblock -#: ../src/guestfs.pod:393 +#. type: textblock +#: ../src/guestfs.pod:453 msgid "" "The main Augeas calls are bound through the C APIs. We don't " "document Augeas itself here because there is excellent documentation on the " "L website." msgstr "" -# type: textblock -#: ../src/guestfs.pod:397 +#. type: textblock +#: ../src/guestfs.pod:457 msgid "" "If you don't want to use Augeas (you fool!) then try calling " "L to get the file as a list of lines which you can " "iterate over." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:401 +#. type: =head2 +#: ../src/guestfs.pod:461 msgid "SELINUX" msgstr "" -# type: textblock -#: ../src/guestfs.pod:403 +#. type: textblock +#: ../src/guestfs.pod:463 msgid "" "We support SELinux guests. To ensure that labeling happens correctly in " "SELinux guests, you need to enable SELinux and load the guest's policy:" msgstr "" -# type: =item -#: ../src/guestfs.pod:409 +#. type: =item +#: ../src/guestfs.pod:469 ../src/guestfs.pod:1281 ../src/guestfs.pod:1412 ../src/guestfs.pod:2185 msgid "1." msgstr "" -# type: textblock -#: ../src/guestfs.pod:411 +#. type: textblock +#: ../src/guestfs.pod:471 msgid "Before launching, do:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:413 +#. type: verbatim +#: ../src/guestfs.pod:473 #, no-wrap msgid "" " guestfs_set_selinux (g, 1);\n" "\n" msgstr "" -# type: =item -#: ../src/guestfs.pod:415 +#. type: =item +#: ../src/guestfs.pod:475 ../src/guestfs.pod:1285 ../src/guestfs.pod:1416 ../src/guestfs.pod:2210 msgid "2." msgstr "" -# type: textblock -#: ../src/guestfs.pod:417 +#. type: textblock +#: ../src/guestfs.pod:477 msgid "" "After mounting the guest's filesystem(s), load the policy. This is best " "done by running the L command in the guest itself:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:421 +#. type: verbatim +#: ../src/guestfs.pod:481 #, no-wrap msgid "" " guestfs_sh (g, \"/usr/sbin/load_policy\");\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:423 +#. type: textblock +#: ../src/guestfs.pod:483 msgid "" "(Older versions of C require you to specify the name of the " "policy file)." msgstr "" -# type: =item -#: ../src/guestfs.pod:426 +#. type: =item +#: ../src/guestfs.pod:486 ../src/guestfs.pod:1422 msgid "3." msgstr "" -# type: textblock -#: ../src/guestfs.pod:428 +#. type: textblock +#: ../src/guestfs.pod:488 msgid "" "Optionally, set the security context for the API. The correct security " "context to use can only be known by inspecting the guest. As an example:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:432 +#. type: verbatim +#: ../src/guestfs.pod:492 #, no-wrap msgid "" " guestfs_setcon (g, \"unconfined_u:unconfined_r:unconfined_t:s0\");\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:436 +#. type: textblock +#: ../src/guestfs.pod:496 msgid "This will work for running commands and editing existing files." msgstr "" -# type: textblock -#: ../src/guestfs.pod:438 +#. type: textblock +#: ../src/guestfs.pod:498 msgid "" "When new files are created, you may need to label them explicitly, for " "example by running the external command C." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:442 +#. type: =head2 +#: ../src/guestfs.pod:502 msgid "UMASK" msgstr "" -# type: textblock -#: ../src/guestfs.pod:444 +#. type: textblock +#: ../src/guestfs.pod:504 msgid "" "Certain calls are affected by the current file mode creation mask (the " "\"umask\"). In particular ones which create files or directories, such as " @@ -914,33 +1024,33 @@ msgid "" "that you supply." msgstr "" -# type: textblock -#: ../src/guestfs.pod:450 +#. type: textblock +#: ../src/guestfs.pod:510 msgid "" "The default umask is C<022>, so files are created with modes such as C<0644> " "and directories with C<0755>." msgstr "" -# type: textblock -#: ../src/guestfs.pod:453 +#. type: textblock +#: ../src/guestfs.pod:513 msgid "" "There are two ways to avoid being affected by umask. Either set umask to 0 " "(call C early after launching). Or call " "L after creating each file or directory." msgstr "" -# type: textblock -#: ../src/guestfs.pod:457 +#. type: textblock +#: ../src/guestfs.pod:517 msgid "For more information about umask, see L." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:459 ../fish/guestfish.pod:566 +#. type: =head1 +#: ../src/guestfs.pod:519 ../fish/guestfish.pod:751 msgid "ENCRYPTED DISKS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:461 +#. type: textblock +#: ../src/guestfs.pod:521 msgid "" "Libguestfs allows you to access Linux guests which have been encrypted using " "whole disk encryption that conforms to the Linux Unified Key Setup (LUKS) " @@ -948,22 +1058,22 @@ msgid "" "modern Linux guests." msgstr "" -# type: textblock -#: ../src/guestfs.pod:467 +#. type: textblock +#: ../src/guestfs.pod:527 msgid "" "Use L to identify LUKS-encrypted block devices (it " "returns the string C)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:470 +#. type: textblock +#: ../src/guestfs.pod:530 msgid "" "Then open these devices by calling L. Obviously you " "will require the passphrase!" msgstr "" -# type: textblock -#: ../src/guestfs.pod:473 +#. type: textblock +#: ../src/guestfs.pod:533 msgid "" "Opening a LUKS device creates a new device mapper device called " "C (where C is the string you supply to " @@ -971,16 +1081,16 @@ msgid "" "decrypted from and encrypted to the underlying block device respectively." msgstr "" -# type: textblock -#: ../src/guestfs.pod:479 +#. type: textblock +#: ../src/guestfs.pod:539 msgid "" "LVM volume groups on the device can be made visible by calling " "L followed by L. The logical " "volume(s) can now be mounted in the usual way." msgstr "" -# type: textblock -#: ../src/guestfs.pod:483 +#. type: textblock +#: ../src/guestfs.pod:543 msgid "" "Use the reverse process to close a LUKS device. Unmount any logical volumes " "on it, deactivate the volume groups by caling C but since version 1.5.3 the most " -"frequently used part of this library has been rewritten in C and moved into " -"the core code)." +"contains operating systems, an install CD or a live CD. (These APIs used to " +"be in a separate Perl-only library called L but since " +"version 1.5.3 the most frequently used part of this library has been " +"rewritten in C and moved into the core code)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:498 +#. type: textblock +#: ../src/guestfs.pod:559 msgid "" "Add all disks belonging to the unknown virtual machine and call " "L in the usual way." msgstr "" -# type: textblock -#: ../src/guestfs.pod:501 +#. type: textblock +#: ../src/guestfs.pod:562 msgid "" "Then call L. This function uses other libguestfs calls " "and certain heuristics, and returns a list of operating systems that were " @@ -1024,8 +1134,8 @@ msgid "" "libguestfs to deal with it.)" msgstr "" -# type: textblock -#: ../src/guestfs.pod:510 +#. type: textblock +#: ../src/guestfs.pod:571 msgid "" "For each root, you can then call various C functions " "to get additional details about that operating system. For example, call " @@ -1033,8 +1143,8 @@ msgid "" "Windows and Linux-based operating systems respectively." msgstr "" -# type: textblock -#: ../src/guestfs.pod:516 +#. type: textblock +#: ../src/guestfs.pod:577 msgid "" "Un*x-like and Linux-based operating systems usually consist of several " "filesystems which are mounted at boot time (for example, a separate boot " @@ -1044,8 +1154,8 @@ msgid "" "hash table like this example:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:523 +#. type: verbatim +#: ../src/guestfs.pod:584 #, no-wrap msgid "" " /boot => /dev/sda1\n" @@ -1054,61 +1164,106 @@ msgid "" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:527 +#. type: textblock +#: ../src/guestfs.pod:588 msgid "" "The caller can then make calls to L to mount the " "filesystems as suggested." msgstr "" -# type: textblock -#: ../src/guestfs.pod:530 +#. type: textblock +#: ../src/guestfs.pod:591 msgid "" "Be careful to mount filesystems in the right order (eg. C before " "C). Sorting the keys of the hash by length, shortest first, should " "work." msgstr "" -# type: textblock -#: ../src/guestfs.pod:534 +#. type: textblock +#: ../src/guestfs.pod:595 msgid "" "Inspection currently only works for some common operating systems. " "Contributors are welcome to send patches for other operating systems that we " "currently cannot detect." msgstr "" -# type: textblock -#: ../src/guestfs.pod:538 +#. type: textblock +#: ../src/guestfs.pod:599 msgid "" "Encrypted disks must be opened before inspection. See L " "for more details. The L function just ignores any " "encrypted devices." msgstr "" -# type: textblock -#: ../src/guestfs.pod:542 +#. type: textblock +#: ../src/guestfs.pod:603 msgid "" "A note on the implementation: The call L performs " "inspection and caches the results in the guest handle. Subsequent calls to " "C return this cached information, but I " "re-read the disks. If you change the content of the guest disks, you can " -"redo inspection by calling L again." +"redo inspection by calling L again. " +"(L works a little differently from the " +"other calls and does read the disks. See documentation for that function " +"for details)." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:549 +#. type: =head3 +#: ../src/guestfs.pod:612 +msgid "INSPECTING INSTALL DISKS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:614 +msgid "" +"Libguestfs (since 1.9.4) can detect some install disks, install CDs, live " +"CDs and more." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:617 +msgid "" +"Call L to return the format of the operating " +"system, which currently can be C (a regular operating system) or " +"C (some sort of install disk)." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:621 +msgid "" +"Further information is available about the operating system that can be " +"installed using the regular inspection APIs like " +"L, L " +"etc." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:626 +msgid "" +"Some additional information specific to installer disks is also available " +"from the L, L and " +"L calls." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:631 msgid "SPECIAL CONSIDERATIONS FOR WINDOWS GUESTS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:551 +#. type: textblock +#: ../src/guestfs.pod:633 msgid "" "Libguestfs can mount NTFS partitions. It does this using the " "L driver." msgstr "" -# type: textblock -#: ../src/guestfs.pod:554 +#. type: =head3 +#: ../src/guestfs.pod:636 +msgid "DRIVE LETTERS AND PATHS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:638 msgid "" "DOS and Windows still use drive letters, and the filesystems are always " "treated as case insensitive by Windows itself, and therefore you might find " @@ -1117,8 +1272,8 @@ msgid "" "that directory might be referred to as C." msgstr "" -# type: textblock -#: ../src/guestfs.pod:560 +#. type: textblock +#: ../src/guestfs.pod:644 msgid "" "Drive letter mappings are outside the scope of libguestfs. You have to use " "libguestfs to read the appropriate Windows Registry and configuration files, " @@ -1126,22 +1281,27 @@ msgid "" "L)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:565 +#. type: textblock +#: ../src/guestfs.pod:649 msgid "" "Replacing backslash characters with forward slash characters is also outside " "the scope of libguestfs, but something that you can easily do." msgstr "" -# type: textblock -#: ../src/guestfs.pod:568 +#. type: textblock +#: ../src/guestfs.pod:652 msgid "" "Where we can help is in resolving the case insensitivity of paths. For " "this, call L." msgstr "" -# type: textblock -#: ../src/guestfs.pod:571 +#. type: =head3 +#: ../src/guestfs.pod:655 +msgid "ACCESSING THE WINDOWS REGISTRY" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:657 msgid "" "Libguestfs also provides some help for decoding Windows Registry \"hive\" " "files, through the library C which is part of the libguestfs project " @@ -1151,185 +1311,228 @@ msgid "" "L for more help on this issue." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:579 +#. type: =head3 +#: ../src/guestfs.pod:665 +msgid "SYMLINKS ON NTFS-3G FILESYSTEMS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:667 +msgid "" +"Ntfs-3g tries to rewrite \"Junction Points\" and NTFS \"symbolic links\" to " +"provide something which looks like a Linux symlink. The way it tries to do " +"the rewriting is described here:" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:671 +msgid "L" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:673 +msgid "" +"The essential problem is that ntfs-3g simply does not have enough " +"information to do a correct job. NTFS links can contain drive letters and " +"references to external device GUIDs that ntfs-3g has no way of resolving. " +"It is almost certainly the case that libguestfs callers should ignore what " +"ntfs-3g does (ie. don't use L on NTFS volumes)." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:680 +msgid "" +"Instead if you encounter a symbolic link on an ntfs-3g filesystem, use " +"L to read the C extended " +"attribute, and read the raw reparse data from that (you can find the format " +"documented in various places around the web)." +msgstr "" + +#. type: =head3 +#: ../src/guestfs.pod:685 +msgid "EXTENDED ATTRIBUTES ON NTFS-3G FILESYSTEMS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:687 +msgid "" +"There are other useful extended attributes that can be read from ntfs-3g " +"filesystems (using L). See:" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:690 +msgid "L" +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:692 msgid "USING LIBGUESTFS WITH OTHER PROGRAMMING LANGUAGES" msgstr "" -# type: textblock -#: ../src/guestfs.pod:581 +#. type: textblock +#: ../src/guestfs.pod:694 msgid "" "Although we don't want to discourage you from using the C API, we will " "mention here that the same API is also available in other languages." msgstr "" -# type: textblock -#: ../src/guestfs.pod:584 +#. type: textblock +#: ../src/guestfs.pod:697 msgid "" "The API is broadly identical in all supported languages. This means that " -"the C call C is C<$g-Emount($path)> in Perl, " -"C in Python, and C in OCaml. In other " -"words, a straightforward, predictable isomorphism between each language." +"the C call C is C<$g-Eadd_drive_ro($file)> " +"in Perl, C in Python, and C in " +"OCaml. In other words, a straightforward, predictable isomorphism between " +"each language." msgstr "" -# type: textblock -#: ../src/guestfs.pod:590 +#. type: textblock +#: ../src/guestfs.pod:703 msgid "" "Error messages are automatically transformed into exceptions if the language " "supports it." msgstr "" -# type: textblock -#: ../src/guestfs.pod:593 +#. type: textblock +#: ../src/guestfs.pod:706 msgid "" "We don't try to \"object orientify\" parts of the API in OO languages, " "although contributors are welcome to write higher level APIs above what we " "provide in their favourite languages if they wish." msgstr "" -# type: =item -#: ../src/guestfs.pod:599 +#. type: =item +#: ../src/guestfs.pod:712 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:601 +#. type: textblock +#: ../src/guestfs.pod:714 msgid "" "You can use the I header file from C++ programs. The C++ API is " "identical to the C API. C++ classes and exceptions are not used." msgstr "" -# type: =item -#: ../src/guestfs.pod:605 +#. type: =item +#: ../src/guestfs.pod:718 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:607 +#. type: textblock +#: ../src/guestfs.pod:720 msgid "" "The C# bindings are highly experimental. Please read the warnings at the " "top of C." msgstr "" -# type: =item -#: ../src/guestfs.pod:610 +#. type: =item +#: ../src/guestfs.pod:723 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:612 +#. type: textblock +#: ../src/guestfs.pod:725 msgid "" "This is the only language binding that is working but incomplete. Only " "calls which return simple integers have been bound in Haskell, and we are " "looking for help to complete this binding." msgstr "" -# type: =item -#: ../src/guestfs.pod:616 +#. type: =item +#: ../src/guestfs.pod:729 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:618 +#. type: textblock +#: ../src/guestfs.pod:731 msgid "" "Full documentation is contained in the Javadoc which is distributed with " "libguestfs." msgstr "" -# type: =item -#: ../src/guestfs.pod:621 +#. type: =item +#: ../src/guestfs.pod:734 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:623 -msgid "For documentation see the file C." +#. type: textblock +#: ../src/guestfs.pod:736 +msgid "See L." msgstr "" -# type: =item -#: ../src/guestfs.pod:625 +#. type: =item +#: ../src/guestfs.pod:738 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:627 -msgid "For documentation see L." +#. type: textblock +#: ../src/guestfs.pod:740 +msgid "See L and L." msgstr "" -# type: =item -#: ../src/guestfs.pod:629 +#. type: =item +#: ../src/guestfs.pod:742 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:631 +#. type: textblock +#: ../src/guestfs.pod:744 msgid "" "For documentation see C supplied with libguestfs sources or in " "the php-libguestfs package for your distribution." msgstr "" -# type: textblock -#: ../src/guestfs.pod:634 +#. type: textblock +#: ../src/guestfs.pod:747 msgid "The PHP binding only works correctly on 64 bit machines." msgstr "" -# type: =item -#: ../src/guestfs.pod:636 +#. type: =item +#: ../src/guestfs.pod:749 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:638 -msgid "For documentation do:" -msgstr "" - -# type: verbatim -#: ../src/guestfs.pod:640 -#, no-wrap -msgid "" -" $ python\n" -" >>> import guestfs\n" -" >>> help (guestfs)\n" -"\n" +#. type: textblock +#: ../src/guestfs.pod:751 +msgid "See L." msgstr "" -# type: =item -#: ../src/guestfs.pod:644 +#. type: =item +#: ../src/guestfs.pod:753 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:646 -msgid "" -"Use the Guestfs module. There is no Ruby-specific documentation, but you " -"can find examples written in Ruby in the libguestfs source." +#. type: textblock +#: ../src/guestfs.pod:755 +msgid "See L." msgstr "" -# type: =item -#: ../src/guestfs.pod:649 +#. type: =item +#: ../src/guestfs.pod:757 msgid "B" msgstr "" -# type: textblock -#: ../src/guestfs.pod:651 -msgid "For documentation see L." +#. type: textblock +#: ../src/guestfs.pod:759 +msgid "See L." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:655 +#. type: =head2 +#: ../src/guestfs.pod:763 msgid "LIBGUESTFS GOTCHAS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:657 +#. type: textblock +#: ../src/guestfs.pod:765 msgid "" "L: \"A feature of a " "system [...] that works in the way it is documented but is counterintuitive " "and almost invites mistakes.\"" msgstr "" -# type: textblock -#: ../src/guestfs.pod:661 +#. type: textblock +#: ../src/guestfs.pod:769 msgid "" "Since we developed libguestfs and the associated tools, there are several " "things we would have designed differently, but are now stuck with for " @@ -1337,103 +1540,110 @@ msgid "" "release, you can expect these to change. Beware of them." msgstr "" -# type: =item -#: ../src/guestfs.pod:669 +#. type: =item +#: ../src/guestfs.pod:777 msgid "Autosync / forgetting to sync." msgstr "" -# type: textblock -#: ../src/guestfs.pod:671 +#. type: textblock +#: ../src/guestfs.pod:779 msgid "" "When modifying a filesystem from C or another language, you B unmount " "all filesystems and call L explicitly before you close the " "libguestfs handle. You can also call:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:675 +#. type: verbatim +#: ../src/guestfs.pod:783 #, no-wrap msgid "" " guestfs_set_autosync (g, 1);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:677 +#. type: textblock +#: ../src/guestfs.pod:785 msgid "" "to have the unmount/sync done automatically for you when the handle 'g' is " "closed. (This feature is called \"autosync\", L " "q.v.)" msgstr "" -# type: textblock -#: ../src/guestfs.pod:681 +#. type: textblock +#: ../src/guestfs.pod:789 msgid "" "If you forget to do this, then it is entirely possible that your changes " "won't be written out, or will be partially written, or (very rarely) that " "you'll get disk corruption." msgstr "" -# type: textblock -#: ../src/guestfs.pod:685 +#. type: textblock +#: ../src/guestfs.pod:793 msgid "" "Note that in L autosync is the default. So quick and dirty " "guestfish scripts that forget to sync will work just fine, which can make " "this very puzzling if you are trying to debug a problem." msgstr "" -# type: =item -#: ../src/guestfs.pod:689 +#. type: textblock +#: ../src/guestfs.pod:797 +msgid "" +"Update: Autosync is enabled by default for all API users starting from " +"libguestfs 1.5.24." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:800 msgid "Mount option C<-o sync> should not be the default." msgstr "" -# type: textblock -#: ../src/guestfs.pod:691 +#. type: textblock +#: ../src/guestfs.pod:802 msgid "" "If you use L, then C<-o sync,noatime> are added implicitly. " "However C<-o sync> does not add any reliability benefit, but does have a " "very large performance impact." msgstr "" -# type: textblock -#: ../src/guestfs.pod:695 +#. type: textblock +#: ../src/guestfs.pod:806 msgid "" "The work around is to use L and set the mount " "options that you actually want to use." msgstr "" -# type: =item -#: ../src/guestfs.pod:698 +#. type: =item +#: ../src/guestfs.pod:809 msgid "Read-only should be the default." msgstr "" -# type: textblock -#: ../src/guestfs.pod:700 +#. type: textblock +#: ../src/guestfs.pod:811 msgid "" "In L, I<--ro> should be the default, and you should have to " "specify I<--rw> if you want to make changes to the image." msgstr "" -# type: textblock -#: ../src/guestfs.pod:703 +#. type: textblock +#: ../src/guestfs.pod:814 msgid "This would reduce the potential to corrupt live VM images." msgstr "" -# type: textblock -#: ../src/guestfs.pod:705 +#. type: textblock +#: ../src/guestfs.pod:816 msgid "" "Note that many filesystems change the disk when you just mount and unmount, " "even if you didn't perform any writes. You need to use " "L to guarantee that the disk is not changed." msgstr "" -# type: =item -#: ../src/guestfs.pod:709 +#. type: =item +#: ../src/guestfs.pod:820 msgid "guestfish command line is hard to use." msgstr "" -# type: textblock -#: ../src/guestfs.pod:711 +#. type: textblock +#: ../src/guestfs.pod:822 msgid "" "C doesn't do what people expect (open C for " "examination). It tries to run a guestfish command C which doesn't " @@ -1442,13 +1652,13 @@ msgid "" "we should have used C to run commands." msgstr "" -# type: =item -#: ../src/guestfs.pod:718 +#. type: =item +#: ../src/guestfs.pod:829 msgid "guestfish megabyte modifiers don't work right on all commands" msgstr "" -# type: textblock -#: ../src/guestfs.pod:720 +#. type: textblock +#: ../src/guestfs.pod:831 msgid "" "In recent guestfish you can use C<1M> to mean 1 megabyte (and similarly for " "other modifiers). What guestfish actually does is to multiply the number " @@ -1457,21 +1667,21 @@ msgid "" "expecting some other unit (eg. megabytes)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:727 +#. type: textblock +#: ../src/guestfs.pod:838 msgid "The most common is L. The guestfish command:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:729 +#. type: verbatim +#: ../src/guestfs.pod:840 #, no-wrap msgid "" " lvcreate LV VG 100M\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:731 +#. type: textblock +#: ../src/guestfs.pod:842 msgid "" "does not do what you might expect. Instead because L is " "already expecting megabytes, this tries to create a 100 I (100 " @@ -1479,41 +1689,83 @@ msgid "" "is also a little obscure." msgstr "" -# type: textblock -#: ../src/guestfs.pod:736 +#. type: textblock +#: ../src/guestfs.pod:847 msgid "" "This could be fixed in the generator by specially marking parameters and " "return values which take bytes or other units." msgstr "" -# type: =item -#: ../src/guestfs.pod:739 -msgid "Library should return errno with error messages." +#. type: =item +#: ../src/guestfs.pod:850 +msgid "Ambiguity between devices and paths" msgstr "" -# type: textblock -#: ../src/guestfs.pod:741 +#. type: textblock +#: ../src/guestfs.pod:852 msgid "" -"It would be a nice-to-have to be able to get the original value of 'errno' " -"from inside the appliance along error paths (where set). Currently " -"L goes through hoops to try to reverse the error message " -"string into an errno, see the function error() in fuse/guestmount.c." +"There is a subtle ambiguity in the API between a device name " +"(eg. C) and a similar pathname. A file might just happen to be " +"called C in the directory C (consider some non-Unix VM image)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:747 +#. type: textblock +#: ../src/guestfs.pod:857 +msgid "" +"In the current API we usually resolve this ambiguity by having two separate " +"calls, for example L and L. " +"Some API calls are ambiguous and (incorrectly) resolve the problem by " +"detecting if the path supplied begins with C." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:863 msgid "" -"In libguestfs 1.5.4, the protocol was changed so that the Linux errno is " -"sent back from the daemon." +"To avoid both the ambiguity and the need to duplicate some calls, we could " +"make paths/devices into structured names. One way to do this would be to " +"use a notation like grub (C), although nobody really likes this " +"aspect of grub. Another way would be to use a structured type, equivalent " +"to this OCaml type:" msgstr "" -# type: =head2 -#: ../src/guestfs.pod:752 +#. type: verbatim +#: ../src/guestfs.pod:869 +#, no-wrap +msgid "" +" type path = Path of string | Device of int | Partition of int * int\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:871 +msgid "which would allow you to pass arguments like:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:873 +#, no-wrap +msgid "" +" Path \"/foo/bar\"\n" +" Device 1 (* /dev/sdb, or perhaps /dev/sda *)\n" +" Partition (1, 2) (* /dev/sdb2 (or is it /dev/sda2 or /dev/sdb3?) *)\n" +" Path \"/dev/sdb2\" (* not a device *)\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:878 +msgid "" +"As you can see there are still problems to resolve even with this " +"representation. Also consider how it might work in guestfish." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:883 msgid "PROTOCOL LIMITS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:754 +#. type: textblock +#: ../src/guestfs.pod:885 msgid "" "Internally libguestfs uses a message-based protocol to pass API calls and " "their responses to and from a small \"appliance\" (see L for " @@ -1523,8 +1775,8 @@ msgid "" "documented, with a link back to this section of the documentation." msgstr "" -# type: textblock -#: ../src/guestfs.pod:762 +#. type: textblock +#: ../src/guestfs.pod:893 msgid "" "A simple call such as L returns its result (the file data) in " "a simple string. Because this string is at some point internally encoded as " @@ -1532,35 +1784,35 @@ msgid "" "the requested file is larger than this then you will get an error." msgstr "" -# type: textblock -#: ../src/guestfs.pod:768 +#. type: textblock +#: ../src/guestfs.pod:899 msgid "" "In order to transfer large files into and out of the guest filesystem, you " "need to use particular calls that support this. The sections L " "and L document how to do this." msgstr "" -# type: textblock -#: ../src/guestfs.pod:772 +#. type: textblock +#: ../src/guestfs.pod:903 msgid "" "You might also consider mounting the disk image using our FUSE filesystem " "support (L)." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:775 +#. type: =head2 +#: ../src/guestfs.pod:906 msgid "KEYS AND PASSPHRASES" msgstr "" -# type: textblock -#: ../src/guestfs.pod:777 +#. type: textblock +#: ../src/guestfs.pod:908 msgid "" "Certain libguestfs calls take a parameter that contains sensitive key " "material, passed in as a C string." msgstr "" -# type: textblock -#: ../src/guestfs.pod:780 +#. type: textblock +#: ../src/guestfs.pod:911 msgid "" "In the future we would hope to change the libguestfs implementation so that " "keys are L-ed into physical RAM, and thus can never end up in " @@ -1568,5877 +1820,8531 @@ msgid "" "of such an implementation." msgstr "" -# type: textblock -#: ../src/guestfs.pod:785 +#. type: textblock +#: ../src/guestfs.pod:916 msgid "" "Therefore you should be aware that any key parameter you pass to libguestfs " "might end up being written out to the swap partition. If this is a concern, " "scrub the swap partition or don't use libguestfs on encrypted devices." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:790 -msgid "CONNECTION MANAGEMENT" -msgstr "" - -# type: =head2 -#: ../src/guestfs.pod:792 -msgid "guestfs_h *" +#. type: =head2 +#: ../src/guestfs.pod:921 +msgid "MULTIPLE HANDLES AND MULTIPLE THREADS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:794 +#. type: textblock +#: ../src/guestfs.pod:923 msgid "" -"C is the opaque type representing a connection handle. Create a " -"handle by calling L. Call L to free the " -"handle and release all resources used." +"All high-level libguestfs actions are synchronous. If you want to use " +"libguestfs asynchronously then you must create a thread." msgstr "" -# type: textblock -#: ../src/guestfs.pod:798 +#. type: textblock +#: ../src/guestfs.pod:926 msgid "" -"For information on using multiple handles and threads, see the section " -"L below." -msgstr "" - -# type: =head2 -#: ../src/guestfs.pod:801 -msgid "guestfs_create" +"Only use the handle from a single thread. Either use the handle exclusively " +"from one thread, or provide your own mutex so that two threads cannot issue " +"calls on the same handle at the same time." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:803 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:930 msgid "" -" guestfs_h *guestfs_create (void);\n" -"\n" -msgstr "" - -# type: textblock -#: ../src/guestfs.pod:805 -msgid "Create a connection handle." +"See the graphical program guestfs-browser for one possible architecture for " +"multithreaded programs using libvirt and libguestfs." msgstr "" -# type: textblock -#: ../src/guestfs.pod:807 -msgid "You have to call L on the handle at least once." +#. type: =head2 +#: ../src/guestfs.pod:933 +msgid "PATH" msgstr "" -# type: textblock -#: ../src/guestfs.pod:809 +#. type: textblock +#: ../src/guestfs.pod:935 msgid "" -"This function returns a non-NULL pointer to a handle on success or NULL on " -"error." -msgstr "" - -# type: textblock -#: ../src/guestfs.pod:812 -msgid "After configuring the handle, you have to call L." +"Libguestfs needs a kernel and initrd.img, which it finds by looking along an " +"internal path." msgstr "" -# type: textblock -#: ../src/guestfs.pod:814 +#. type: textblock +#: ../src/guestfs.pod:938 msgid "" -"You may also want to configure error handling for the handle. See L section below." -msgstr "" - -# type: =head2 -#: ../src/guestfs.pod:817 -msgid "guestfs_close" +"By default it looks for these in the directory C<$libdir/guestfs> " +"(eg. C or C)." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:819 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:941 msgid "" -" void guestfs_close (guestfs_h *g);\n" -"\n" +"Use L or set the environment variable L " +"to change the directories that libguestfs will search in. The value is a " +"colon-separated list of paths. The current directory is I searched " +"unless the path contains an empty element or C<.>. For example " +"C would search the current directory and " +"then C." msgstr "" -# type: textblock -#: ../src/guestfs.pod:821 -msgid "This closes the connection handle and frees up all resources used." +#. type: =head2 +#: ../src/guestfs.pod:948 +msgid "QEMU WRAPPERS" msgstr "" -# type: =head1 -#: ../src/guestfs.pod:823 -msgid "ERROR HANDLING" +#. type: textblock +#: ../src/guestfs.pod:950 +msgid "" +"If you want to compile your own qemu, run qemu from a non-standard location, " +"or pass extra arguments to qemu, then you can write a shell-script wrapper " +"around qemu." msgstr "" -# type: textblock -#: ../src/guestfs.pod:825 +#. type: textblock +#: ../src/guestfs.pod:954 msgid "" -"The convention in all functions that return C is that they return C<-1> " -"to indicate an error. You can get additional information on errors by " -"calling L and/or by setting up an error handler with " -"L." +"There is one important rule to remember: you I> as the " +"last command in the shell script (so that qemu replaces the shell and " +"becomes the direct child of the libguestfs-using program). If you don't do " +"this, then the qemu process won't be cleaned up correctly." msgstr "" -# type: textblock -#: ../src/guestfs.pod:830 -msgid "The default error handler prints the information string to C." +#. type: textblock +#: ../src/guestfs.pod:959 +msgid "" +"Here is an example of a wrapper, where I have built my own copy of qemu from " +"source:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:832 +#. type: verbatim +#: ../src/guestfs.pod:962 +#, no-wrap msgid "" -"Out of memory errors are handled differently. The default action is to call " -"L. If this is undesirable, then you can set a handler using " -"L." +" #!/bin/sh -\n" +" qemudir=/home/rjones/d/qemu\n" +" exec $qemudir/x86_64-softmmu/qemu-system-x86_64 -L $qemudir/pc-bios " +"\"$@\"\n" +"\n" msgstr "" -# type: =head2 -#: ../src/guestfs.pod:836 -msgid "guestfs_last_error" +#. type: textblock +#: ../src/guestfs.pod:966 +msgid "" +"Save this script as C (or wherever), C, and " +"then use it by setting the LIBGUESTFS_QEMU environment variable. For " +"example:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:838 +#. type: verbatim +#: ../src/guestfs.pod:970 #, no-wrap msgid "" -" const char *guestfs_last_error (guestfs_h *g);\n" +" LIBGUESTFS_QEMU=/tmp/qemu.wrapper guestfish\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:840 +#. type: textblock +#: ../src/guestfs.pod:972 msgid "" -"This returns the last error message that happened on C. If there has not " -"been an error since the handle was created, then this returns C." +"Note that libguestfs also calls qemu with the -help and -version options in " +"order to determine features." msgstr "" -# type: textblock -#: ../src/guestfs.pod:844 +#. type: =head2 +#: ../src/guestfs.pod:975 +msgid "ATTACHING TO RUNNING DAEMONS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:977 msgid "" -"The lifetime of the returned string is until the next error occurs, or " -"L is called." +"I This is B and has a tendency to eat " +"babies. Use with caution." msgstr "" -# type: textblock -#: ../src/guestfs.pod:847 +#. type: textblock +#: ../src/guestfs.pod:980 msgid "" -"The error string is not localized (ie. is always in English), because this " -"makes searching for error messages in search engines give the largest number " -"of results." +"I This section explains how to attach to a running daemon from a " +"low level perspective. For most users, simply using virt tools such as " +"L with the I<--live> option will \"just work\"." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:851 -msgid "guestfs_set_error_handler" +#. type: =head3 +#: ../src/guestfs.pod:984 +msgid "Using guestfs_set_attach_method" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:853 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:986 msgid "" -" typedef void (*guestfs_error_handler_cb) (guestfs_h *g,\n" -" void *opaque,\n" -" const char *msg);\n" -" void guestfs_set_error_handler (guestfs_h *g,\n" -" guestfs_error_handler_cb cb,\n" -" void *opaque);\n" -"\n" +"By calling L you can change how the library " +"connects to the C daemon in L (read " +"L for some background)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:860 +#. type: textblock +#: ../src/guestfs.pod:990 msgid "" -"The callback C will be called if there is an error. The parameters " -"passed to the callback are an opaque data pointer and the error message " -"string." +"The normal attach method is C, where a small appliance is created " +"containing the daemon, and then the library connects to this." msgstr "" -# type: textblock -#: ../src/guestfs.pod:864 +#. type: textblock +#: ../src/guestfs.pod:993 msgid "" -"Note that the message string C is freed as soon as the callback " -"function returns, so if you want to stash it somewhere you must make your " -"own copy." +"Setting attach method to C> (where I is the path of a " +"Unix domain socket) causes L to connect to an existing " +"daemon over the Unix domain socket." msgstr "" -# type: textblock -#: ../src/guestfs.pod:868 -msgid "The default handler prints messages on C." +#. type: textblock +#: ../src/guestfs.pod:997 +msgid "" +"The normal use for this is to connect to a running virtual machine that " +"contains a C daemon, and send commands so you can read and write " +"files inside the live virtual machine." msgstr "" -# type: textblock -#: ../src/guestfs.pod:870 -msgid "If you set C to C then I handler is called." +#. type: =head3 +#: ../src/guestfs.pod:1001 +msgid "Using guestfs_add_domain with live flag" msgstr "" -# type: =head2 -#: ../src/guestfs.pod:872 -msgid "guestfs_get_error_handler" +#. type: textblock +#: ../src/guestfs.pod:1003 +msgid "" +"L provides some help for getting the correct attach " +"method. If you pass the C option to this function, then (if the " +"virtual machine is running) it will examine the libvirt XML looking for a " +"virtio-serial channel to connect to:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:874 +#. type: verbatim +#: ../src/guestfs.pod:1009 #, no-wrap msgid "" -" guestfs_error_handler_cb guestfs_get_error_handler (guestfs_h *g,\n" -" void **opaque_rtn);\n" +" \n" +" ...\n" +" \n" +" ...\n" +" \n" +" \n" +" \n" +" \n" +" ...\n" +" \n" +" \n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:877 -msgid "Returns the current error handler callback." +#. type: textblock +#: ../src/guestfs.pod:1021 +msgid "" +"L extracts C and sets the attach " +"method to C." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:879 -msgid "guestfs_set_out_of_memory_handler" +#. type: textblock +#: ../src/guestfs.pod:1024 +msgid "" +"Some of the libguestfs tools (including guestfish) support a I<--live> " +"option which is passed through to L thus allowing you " +"to attach to and modify live virtual machines." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:881 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:1028 msgid "" -" typedef void (*guestfs_abort_cb) (void);\n" -" int guestfs_set_out_of_memory_handler (guestfs_h *g,\n" -" guestfs_abort_cb);\n" -"\n" +"The virtual machine needs to have been set up beforehand so that it has the " +"virtio-serial channel and so that guestfsd is running inside it." msgstr "" -# type: textblock -#: ../src/guestfs.pod:885 -msgid "" -"The callback C will be called if there is an out of memory situation. " -"I." +#. type: =head2 +#: ../src/guestfs.pod:1032 +msgid "ABI GUARANTEE" msgstr "" -# type: textblock -#: ../src/guestfs.pod:888 -msgid "The default is to call L." +#. type: textblock +#: ../src/guestfs.pod:1034 +msgid "" +"We guarantee the libguestfs ABI (binary interface), for public, high-level " +"actions as outlined in this section. Although we will deprecate some " +"actions, for example if they get replaced by newer calls, we will keep the " +"old actions forever. This allows you the developer to program in confidence " +"against the libguestfs API." msgstr "" -# type: textblock -#: ../src/guestfs.pod:890 -msgid "You cannot set C to C. You can't ignore out of memory situations." +#. type: =head2 +#: ../src/guestfs.pod:1040 +msgid "BLOCK DEVICE NAMING" msgstr "" -# type: =head2 -#: ../src/guestfs.pod:893 -msgid "guestfs_get_out_of_memory_handler" +#. type: textblock +#: ../src/guestfs.pod:1042 +msgid "" +"In the kernel there is now quite a profusion of schemata for naming block " +"devices (in this context, by I I mean a physical or virtual " +"hard drive). The original Linux IDE driver used names starting with " +"C. SCSI devices have historically used a different naming scheme, " +"C. When the Linux kernel I driver became a popular " +"replacement for the old IDE driver (particularly for SATA devices) those " +"devices also used the C scheme. Additionally we now have virtual " +"machines with paravirtualized drivers. This has created several different " +"naming systems, such as C for virtio disks and C for " +"Xen PV disks." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:895 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:1054 msgid "" -" guestfs_abort_fn guestfs_get_out_of_memory_handler (guestfs_h *g);\n" -"\n" +"As discussed above, libguestfs uses a qemu appliance running an embedded " +"Linux kernel to access block devices. We can run a variety of appliances " +"based on a variety of Linux kernels." msgstr "" -# type: textblock -#: ../src/guestfs.pod:897 -msgid "This returns the current out of memory handler." +#. type: textblock +#: ../src/guestfs.pod:1058 +msgid "" +"This causes a problem for libguestfs because many API calls use device or " +"partition names. Working scripts and the recipe (example) scripts that we " +"make available over the internet could fail if the naming scheme changes." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:899 -msgid "PATH" +#. type: textblock +#: ../src/guestfs.pod:1063 +msgid "" +"Therefore libguestfs defines C as the I. " +"Internally C names are translated, if necessary, to other names as " +"required. For example, under RHEL 5 which uses the C scheme, any " +"device parameter C is translated to C transparently." msgstr "" -# type: textblock -#: ../src/guestfs.pod:901 +#. type: textblock +#: ../src/guestfs.pod:1069 msgid "" -"Libguestfs needs a kernel and initrd.img, which it finds by looking along an " -"internal path." +"Note that this I applies to parameters. The L, " +"L and similar calls return the true names of the " +"devices and partitions as known to the appliance." +msgstr "" + +#. type: =head3 +#: ../src/guestfs.pod:1074 +msgid "ALGORITHM FOR BLOCK DEVICE NAME TRANSLATION" msgstr "" -# type: textblock -#: ../src/guestfs.pod:904 +#. type: textblock +#: ../src/guestfs.pod:1076 msgid "" -"By default it looks for these in the directory C<$libdir/guestfs> " -"(eg. C or C)." +"Usually this translation is transparent. However in some (very rare) cases " +"you may need to know the exact algorithm. Such cases include where you use " +"L to add a mixture of virtio and IDE devices to the " +"qemu-based appliance, so have a mixture of C and C " +"devices." msgstr "" -# type: textblock -#: ../src/guestfs.pod:907 +#. type: textblock +#: ../src/guestfs.pod:1082 msgid "" -"Use L or set the environment variable L " -"to change the directories that libguestfs will search in. The value is a " -"colon-separated list of paths. The current directory is I searched " -"unless the path contains an empty element or C<.>. For example " -"C would search the current directory and " -"then C." +"The algorithm is applied only to I which are known to be either " +"device or partition names. Return values from functions such as " +"L are never changed." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:914 -msgid "HIGH-LEVEL API ACTIONS" +#. type: textblock +#: ../src/guestfs.pod:1090 +msgid "Is the string a parameter which is a device or partition name?" msgstr "" -# type: =head2 -#: ../src/guestfs.pod:916 -msgid "ABI GUARANTEE" +#. type: textblock +#: ../src/guestfs.pod:1094 +msgid "Does the string begin with C?" msgstr "" -# type: textblock -#: ../src/guestfs.pod:918 +#. type: textblock +#: ../src/guestfs.pod:1098 msgid "" -"We guarantee the libguestfs ABI (binary interface), for public, high-level " -"actions as outlined in this section. Although we will deprecate some " -"actions, for example if they get replaced by newer calls, we will keep the " -"old actions forever. This allows you the developer to program in confidence " -"against the libguestfs API." +"Does the named device exist? If so, we use that device. However if I " +"then we continue with this algorithm." msgstr "" -# type: textblock -#: ../src/guestfs.pod:924 ../fish/guestfish.pod:796 -msgid "@ACTIONS@" +#. type: textblock +#: ../src/guestfs.pod:1103 +msgid "Replace initial C string with C." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:926 -msgid "STRUCTURES" +#. type: textblock +#: ../src/guestfs.pod:1105 +msgid "For example, change C to C." msgstr "" -# type: textblock -#: ../src/guestfs.pod:928 -msgid "@STRUCTS@" +#. type: textblock +#: ../src/guestfs.pod:1107 +msgid "If that named device exists, use it. If not, continue." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:930 -msgid "AVAILABILITY" +#. type: textblock +#: ../src/guestfs.pod:1111 +msgid "Replace initial C string with C." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:932 -msgid "GROUPS OF FUNCTIONALITY IN THE APPLIANCE" +#. type: textblock +#: ../src/guestfs.pod:1113 +msgid "If that named device exists, use it. If not, return an error." msgstr "" -# type: textblock -#: ../src/guestfs.pod:934 -msgid "" -"Using L you can test availability of the following " -"groups of functions. This test queries the appliance to see if the " -"appliance you are currently using supports the functionality." +#. type: =head3 +#: ../src/guestfs.pod:1117 +msgid "PORTABILITY CONCERNS WITH BLOCK DEVICE NAMING" msgstr "" -# type: textblock -#: ../src/guestfs.pod:939 -msgid "@AVAILABILITY@" +#. type: textblock +#: ../src/guestfs.pod:1119 +msgid "" +"Although the standard naming scheme and automatic translation is useful for " +"simple programs and guestfish scripts, for larger programs it is best not to " +"rely on this mechanism." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:941 -msgid "GUESTFISH supported COMMAND" +#. type: textblock +#: ../src/guestfs.pod:1123 +msgid "" +"Where possible for maximum future portability programs using libguestfs " +"should use these future-proof techniques:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:943 +#. type: textblock +#: ../src/guestfs.pod:1130 msgid "" -"In L there is a handy interactive command C which " -"prints out the available groups and whether they are supported by this build " -"of libguestfs. Note however that you have to do C first." +"Use L or L to list actual " +"device names, and then use those names directly." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:948 -msgid "SINGLE CALLS AT COMPILE TIME" +#. type: textblock +#: ../src/guestfs.pod:1133 +msgid "Since those device names exist by definition, they will never be translated." msgstr "" -# type: textblock -#: ../src/guestfs.pod:950 +#. type: textblock +#: ../src/guestfs.pod:1138 msgid "" -"Since version 1.5.8, Cguestfs.hE> defines symbols for each C API " -"function, such as:" +"Use higher level ways to identify filesystems, such as LVM names, UUIDs and " +"filesystem labels." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:953 -#, no-wrap +#. type: =head1 +#: ../src/guestfs.pod:1143 +msgid "SECURITY" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1145 msgid "" -" #define LIBGUESTFS_HAVE_DD 1\n" -"\n" +"This section discusses security implications of using libguestfs, " +"particularly with untrusted or malicious guests or disk images." msgstr "" -# type: textblock -#: ../src/guestfs.pod:955 -msgid "if L is available." +#. type: =head2 +#: ../src/guestfs.pod:1148 +msgid "GENERAL SECURITY CONSIDERATIONS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:957 +#. type: textblock +#: ../src/guestfs.pod:1150 msgid "" -"Before version 1.5.8, if you needed to test whether a single libguestfs " -"function is available at compile time, we recommended using build tools such " -"as autoconf or cmake. For example in autotools you could use:" +"Be careful with any files or data that you download from a guest (by " +"\"download\" we mean not just the L command but any " +"command that reads files, filenames, directories or anything else from a " +"disk image). An attacker could manipulate the data to fool your program " +"into doing the wrong thing. Consider cases such as:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:962 -#, no-wrap -msgid "" -" AC_CHECK_LIB([guestfs],[guestfs_create])\n" -" AC_CHECK_FUNCS([guestfs_dd])\n" -"\n" +#. type: textblock +#: ../src/guestfs.pod:1160 +msgid "the data (file etc) not being present" msgstr "" -# type: textblock -#: ../src/guestfs.pod:965 -msgid "" -"which would result in C being either defined or not defined " -"in your program." +#. type: textblock +#: ../src/guestfs.pod:1164 +msgid "being present but empty" msgstr "" -# type: =head2 -#: ../src/guestfs.pod:968 -msgid "SINGLE CALLS AT RUN TIME" +#. type: textblock +#: ../src/guestfs.pod:1168 +msgid "being much larger than normal" msgstr "" -# type: textblock -#: ../src/guestfs.pod:970 -msgid "" -"Testing at compile time doesn't guarantee that a function really exists in " -"the library. The reason is that you might be dynamically linked against a " -"previous I (dynamic library) which doesn't have the call. " -"This situation unfortunately results in a segmentation fault, which is a " -"shortcoming of the C dynamic linking system itself." +#. type: textblock +#: ../src/guestfs.pod:1172 +msgid "containing arbitrary 8 bit data" msgstr "" -# type: textblock -#: ../src/guestfs.pod:977 +#. type: textblock +#: ../src/guestfs.pod:1176 +msgid "being in an unexpected character encoding" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1180 +msgid "containing homoglyphs." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:1184 +msgid "SECURITY OF MOUNTING FILESYSTEMS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1186 msgid "" -"You can use L to test if a function is available at run time, as " -"in this example program (note that you still need the compile time check as " -"well):" +"When you mount a filesystem under Linux, mistakes in the kernel filesystem " +"(VFS) module can sometimes be escalated into exploits by deliberately " +"creating a malicious, malformed filesystem. These exploits are very severe " +"for two reasons. Firstly there are very many filesystem drivers in the " +"kernel, and many of them are infrequently used and not much developer " +"attention has been paid to the code. Linux userspace helps potential " +"crackers by detecting the filesystem type and automatically choosing the " +"right VFS driver, even if that filesystem type is obscure or unexpected for " +"the administrator. Secondly, a kernel-level exploit is like a local root " +"exploit (worse in some ways), giving immediate and total access to the " +"system right down to the hardware level." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:981 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:1199 msgid "" -" #include \n" -" #include \n" -" #include \n" -" #include \n" -" #include \n" -" \n" +"That explains why you should never mount a filesystem from an untrusted " +"guest on your host kernel. How about libguestfs? We run a Linux kernel " +"inside a qemu virtual machine, usually running as a non-root user. The " +"attacker would need to write a filesystem which first exploited the kernel, " +"and then exploited either qemu virtualization (eg. a faulty qemu driver) or " +"the libguestfs protocol, and finally to be as serious as the host kernel " +"exploit it would need to escalate its privileges to root. This multi-step " +"escalation, performed by a static piece of data, is thought to be extremely " +"hard to do, although we never say 'never' about security issues." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:987 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:1210 msgid "" -" main ()\n" -" {\n" -" #ifdef LIBGUESTFS_HAVE_DD\n" -" void *dl;\n" -" int has_function;\n" -" \n" +"In any case callers can reduce the attack surface by forcing the filesystem " +"type when mounting (use L)." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:993 -#, no-wrap +#. type: =head2 +#: ../src/guestfs.pod:1213 +msgid "PROTOCOL SECURITY" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1215 msgid "" -" /* Test if the function guestfs_dd is really available. */\n" -" dl = dlopen (NULL, RTLD_LAZY);\n" -" if (!dl) {\n" -" fprintf (stderr, \"dlopen: %s\\n\", dlerror ());\n" -" exit (EXIT_FAILURE);\n" -" }\n" -" has_function = dlsym (dl, \"guestfs_dd\") != NULL;\n" -" dlclose (dl);\n" -" \n" +"The protocol is designed to be secure, being based on RFC 4506 (XDR) with a " +"defined upper message size. However a program that uses libguestfs must " +"also take care - for example you can write a program that downloads a binary " +"from a disk image and executes it locally, and no amount of protocol " +"security will save you from the consequences." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1002 -#, no-wrap +#. type: =head2 +#: ../src/guestfs.pod:1221 +msgid "INSPECTION SECURITY" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1223 msgid "" -" if (!has_function)\n" -" printf (\"this libguestfs.so does NOT have guestfs_dd function\\n\");\n" -" else {\n" -" printf (\"this libguestfs.so has guestfs_dd function\\n\");\n" -" /* Now it's safe to call\n" -" guestfs_dd (g, \"foo\", \"bar\");\n" -" */\n" -" }\n" -" #else\n" -" printf (\"guestfs_dd function was not found at compile time\\n\");\n" -" #endif\n" -" }\n" -"\n" +"Parts of the inspection API (see L) return untrusted strings " +"directly from the guest, and these could contain any 8 bit data. Callers " +"should be careful to escape these before printing them to a structured file " +"(for example, use HTML escaping if creating a web page)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1015 +#. type: textblock +#: ../src/guestfs.pod:1229 msgid "" -"You may think the above is an awful lot of hassle, and it is. There are " -"other ways outside of the C linking system to ensure that this kind of " -"incompatibility never arises, such as using package versioning:" +"Guest configuration may be altered in unusual ways by the administrator of " +"the virtual machine, and may not reflect reality (particularly for untrusted " +"or actively malicious guests). For example we parse the hostname from " +"configuration files like C that we find in the " +"guest, but the guest administrator can easily manipulate these files to " +"provide the wrong hostname." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1020 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:1237 msgid "" -" Requires: libguestfs >= 1.0.80\n" -"\n" +"The inspection API parses guest configuration using two external libraries: " +"Augeas (Linux configuration) and hivex (Windows Registry). Both are " +"designed to be robust in the face of malicious data, although denial of " +"service attacks are still possible, for example with oversized configuration " +"files." msgstr "" -# type: =end -#: ../src/guestfs.pod:1022 ../src/guestfs.pod:1027 -msgid "html" +#. type: =head2 +#: ../src/guestfs.pod:1243 +msgid "RUNNING UNTRUSTED GUEST COMMANDS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1024 +#. type: textblock +#: ../src/guestfs.pod:1245 msgid "" -" " +"Be very cautious about running commands from the guest. By running a " +"command in the guest, you are giving CPU time to a binary that you do not " +"control, under the same user account as the library, albeit wrapped in qemu " +"virtualization. More information and alternatives can be found in the " +"section L." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:1029 -msgid "ARCHITECTURE" +#. type: =head2 +#: ../src/guestfs.pod:1251 +msgid "CVE-2010-3851" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1031 -msgid "" -"Internally, libguestfs is implemented by running an appliance (a special " -"type of small virtual machine) using L. Qemu runs as a child " -"process of the main program." +#. type: textblock +#: ../src/guestfs.pod:1253 +msgid "https://bugzilla.redhat.com/642934" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1035 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:1255 msgid "" -" ___________________\n" -" / \\\n" -" | main program |\n" -" | |\n" -" | | child process / appliance\n" -" | | __________________________\n" -" | | / qemu \\\n" -" +-------------------+ RPC | +-----------------+ |\n" -" | libguestfs <--------------------> guestfsd | |\n" -" | | | +-----------------+ |\n" -" \\___________________/ | | Linux kernel | |\n" -" | +--^--------------+ |\n" -" \\_________|________________/\n" -" |\n" -" _______v______\n" -" / \\\n" -" | Device or |\n" -" | disk image |\n" -" \\______________/\n" -"\n" +"This security bug concerns the automatic disk format detection that qemu " +"does on disk images." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1055 +#. type: textblock +#: ../src/guestfs.pod:1258 msgid "" -"The library, linked to the main program, creates the child process and hence " -"the appliance in the L function." +"A raw disk image is just the raw bytes, there is no header. Other disk " +"images like qcow2 contain a special header. Qemu deals with this by looking " +"for one of the known headers, and if none is found then assuming the disk " +"image must be raw." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1058 +#. type: textblock +#: ../src/guestfs.pod:1263 msgid "" -"Inside the appliance is a Linux kernel and a complete stack of userspace " -"tools (such as LVM and ext2 programs) and a small controlling daemon called " -"L. The library talks to L using remote procedure " -"calls (RPC). There is a mostly one-to-one correspondence between libguestfs " -"API calls and RPC calls to the daemon. Lastly the disk image(s) are " -"attached to the qemu process which translates device access by the " -"appliance's Linux kernel into accesses to the image." +"This allows a guest which has been given a raw disk image to write some " +"other header. At next boot (or when the disk image is accessed by " +"libguestfs) qemu would do autodetection and think the disk image format was, " +"say, qcow2 based on the header written by the guest." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1067 +#. type: textblock +#: ../src/guestfs.pod:1268 msgid "" -"A common misunderstanding is that the appliance \"is\" the virtual machine. " -"Although the disk image you are attached to might also be used by some " -"virtual machine, libguestfs doesn't know or care about this. (But you will " -"care if both libguestfs's qemu process and your virtual machine are trying " -"to update the disk image at the same time, since these usually results in " -"massive disk corruption)." +"This in itself would not be a problem, but qcow2 offers many features, one " +"of which is to allow a disk image to refer to another image (called the " +"\"backing disk\"). It does this by placing the path to the backing disk " +"into the qcow2 header. This path is not validated and could point to any " +"host file (eg. \"/etc/passwd\"). The backing disk is then exposed through " +"\"holes\" in the qcow2 disk image, which of course is completely under the " +"control of the attacker." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:1074 -msgid "STATE MACHINE" +#. type: textblock +#: ../src/guestfs.pod:1276 +msgid "In libguestfs this is rather hard to exploit except under two circumstances:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1076 -msgid "libguestfs uses a state machine to model the child process:" +#. type: textblock +#: ../src/guestfs.pod:1283 +msgid "You have enabled the network or have opened the disk in write mode." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1078 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:1287 msgid "" -" |\n" -" guestfs_create\n" -" |\n" -" |\n" -" ____V_____\n" -" / \\\n" -" | CONFIG |\n" -" \\__________/\n" -" ^ ^ ^ \\\n" -" / | \\ \\ guestfs_launch\n" -" / | _\\__V______\n" -" / | / \\\n" -" / | | LAUNCHING |\n" -" / | \\___________/\n" -" / | /\n" -" / | guestfs_launch\n" -" / | /\n" -" ______ / __|____V\n" -" / \\ ------> / \\\n" -" | BUSY | | READY |\n" -" \\______/ <------ \\________/\n" -"\n" +"You are also running untrusted code from the guest (see L)." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1100 +#. type: textblock +#: ../src/guestfs.pod:1292 msgid "" -"The normal transitions are (1) CONFIG (when the handle is created, but there " -"is no child process), (2) LAUNCHING (when the child process is booting up), " -"(3) alternating between READY and BUSY as commands are issued to, and " -"carried out by, the child process." +"The way to avoid this is to specify the expected disk format when adding " +"disks (the optional C option to L). You " +"should always do this if the disk is raw format, and it's a good idea for " +"other cases too." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1105 +#. type: textblock +#: ../src/guestfs.pod:1297 msgid "" -"The guest may be killed by L, or may die " -"asynchronously at any time (eg. due to some internal error), and that causes " -"the state to transition back to CONFIG." +"For disks added from libvirt using calls like L, the " +"format is fetched from libvirt and passed through." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1109 +#. type: textblock +#: ../src/guestfs.pod:1300 msgid "" -"Configuration commands for qemu such as L can only be " -"issued when in the CONFIG state." +"For libguestfs tools, use the I<--format> command line parameter as " +"appropriate." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:1303 +msgid "CONNECTION MANAGEMENT" +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:1305 +msgid "guestfs_h *" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1112 +#. type: textblock +#: ../src/guestfs.pod:1307 msgid "" -"The API offers one call that goes from CONFIG through LAUNCHING to READY. " -"L blocks until the child process is READY to accept " -"commands (or until some failure or timeout). L internally " -"moves the state from CONFIG to LAUNCHING while it is running." +"C is the opaque type representing a connection handle. Create a " +"handle by calling L. Call L to free the " +"handle and release all resources used." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1118 +#. type: textblock +#: ../src/guestfs.pod:1311 msgid "" -"API actions such as L can only be issued when in the READY " -"state. These API calls block waiting for the command to be carried out " -"(ie. the state to transition to BUSY and then back to READY). There are no " -"non-blocking versions, and no way to issue more than one command per handle " -"at the same time." +"For information on using multiple handles and threads, see the section " +"L below." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1124 +#. type: =head2 +#: ../src/guestfs.pod:1314 +msgid "guestfs_create" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1316 +#, no-wrap msgid "" -"Finally, the child process sends asynchronous messages back to the main " -"program, such as kernel log messages. You can register a callback to " -"receive these messages." +" guestfs_h *guestfs_create (void);\n" +"\n" msgstr "" -# type: =head2 -#: ../src/guestfs.pod:1128 -msgid "SETTING CALLBACKS TO HANDLE EVENTS" +#. type: textblock +#: ../src/guestfs.pod:1318 +msgid "Create a connection handle." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1130 +#. type: textblock +#: ../src/guestfs.pod:1320 msgid "" -"The child process generates events in some situations. Current events " -"include: receiving a log message, the child process exits." +"You have to call L (or one of the equivalent calls) " +"on the handle at least once." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1133 +#. type: textblock +#: ../src/guestfs.pod:1323 msgid "" -"Use the C functions to set a callback for different " -"types of events." +"This function returns a non-NULL pointer to a handle on success or NULL on " +"error." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1136 +#. type: textblock +#: ../src/guestfs.pod:1326 +msgid "After configuring the handle, you have to call L." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1328 msgid "" -"Only I can be registered for each handle. " -"Calling C again overwrites the previous callback of " -"that type. Cancel all callbacks of this type by calling this function with " -"C set to C." +"You may also want to configure error handling for the handle. See L section below." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:1141 -msgid "guestfs_set_log_message_callback" +#. type: =head2 +#: ../src/guestfs.pod:1331 +msgid "guestfs_close" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1143 +#. type: verbatim +#: ../src/guestfs.pod:1333 #, no-wrap msgid "" -" typedef void (*guestfs_log_message_cb) (guestfs_h *g, void *opaque,\n" -" char *buf, int len);\n" -" void guestfs_set_log_message_callback (guestfs_h *g,\n" -" guestfs_log_message_cb cb,\n" -" void *opaque);\n" +" void guestfs_close (guestfs_h *g);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1149 +#. type: textblock +#: ../src/guestfs.pod:1335 +msgid "This closes the connection handle and frees up all resources used." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:1337 +msgid "ERROR HANDLING" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1339 msgid "" -"The callback function C will be called whenever qemu or the guest writes " -"anything to the console." +"API functions can return errors. For example, almost all functions that " +"return C will return C<-1> to indicate an error." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1152 -msgid "Use this function to capture kernel messages and similar." +#. type: textblock +#: ../src/guestfs.pod:1342 +msgid "" +"Additional information is available for errors: an error message string and " +"optionally an error number (errno) if the thing that failed was a system " +"call." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1154 +#. type: textblock +#: ../src/guestfs.pod:1346 msgid "" -"Normally there is no log message handler, and log messages are just " -"discarded." +"You can get at the additional information about the last error on the handle " +"by calling L, L, and/or by setting " +"up an error handler with L." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:1157 -msgid "guestfs_set_subprocess_quit_callback" +#. type: textblock +#: ../src/guestfs.pod:1351 +msgid "" +"When the handle is created, a default error handler is installed which " +"prints the error message string to C. For small short-running " +"command line programs it is sufficient to do:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1159 +#. type: verbatim +#: ../src/guestfs.pod:1355 #, no-wrap msgid "" -" typedef void (*guestfs_subprocess_quit_cb) (guestfs_h *g, void *opaque);\n" -" void guestfs_set_subprocess_quit_callback (guestfs_h *g,\n" -" guestfs_subprocess_quit_cb cb,\n" -" void *opaque);\n" +" if (guestfs_launch (g) == -1)\n" +" exit (EXIT_FAILURE);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1164 +#. type: textblock +#: ../src/guestfs.pod:1358 msgid "" -"The callback function C will be called when the child process quits, " -"either asynchronously or if killed by L. (This " -"corresponds to a transition from any state to the CONFIG state)." +"since the default error handler will ensure that an error message has been " +"printed to C before the program exits." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:1169 -msgid "guestfs_set_launch_done_callback" +#. type: textblock +#: ../src/guestfs.pod:1361 +msgid "" +"For other programs the caller will almost certainly want to install an " +"alternate error handler or do error handling in-line like this:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1171 +#. type: verbatim +#: ../src/guestfs.pod:1364 #, no-wrap msgid "" -" typedef void (*guestfs_launch_done_cb) (guestfs_h *g, void *opaque);\n" -" void guestfs_set_launch_done_callback (guestfs_h *g,\n" -" guestfs_launch_done_cb cb,\n" -" void *opaque);\n" -"\n" +" g = guestfs_create ();\n" +" \n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1176 +#. type: verbatim +#: ../src/guestfs.pod:1366 +#, no-wrap msgid "" -"The callback function C will be called when the child process becomes " -"ready first time after it has been launched. (This corresponds to a " -"transition from LAUNCHING to the READY state)." -msgstr "" - -# type: =head2 -#: ../src/guestfs.pod:1180 -msgid "guestfs_set_close_callback" +" /* This disables the default behaviour of printing errors\n" +" on stderr. */\n" +" guestfs_set_error_handler (g, NULL, NULL);\n" +" \n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1182 +#. type: verbatim +#: ../src/guestfs.pod:1370 #, no-wrap msgid "" -" typedef void (*guestfs_close_cb) (guestfs_h *g, void *opaque);\n" -" void guestfs_set_close_callback (guestfs_h *g,\n" -" guestfs_close_cb cb,\n" -" void *opaque);\n" +" if (guestfs_launch (g) == -1) {\n" +" /* Examine the error message and print it etc. */\n" +" char *msg = guestfs_last_error (g);\n" +" int errnum = guestfs_last_errno (g);\n" +" fprintf (stderr, \"%s\\n\", msg);\n" +" /* ... */\n" +" }\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1187 +#. type: textblock +#: ../src/guestfs.pod:1378 msgid "" -"The callback function C will be called while the handle is being closed " -"(synchronously from L)." +"Out of memory errors are handled differently. The default action is to call " +"L. If this is undesirable, then you can set a handler using " +"L." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1190 +#. type: textblock +#: ../src/guestfs.pod:1382 msgid "" -"Note that libguestfs installs an L handler to try to clean up " -"handles that are open when the program exits. This means that this callback " -"might be called indirectly from L, which can cause unexpected " -"problems in higher-level languages (eg. if your HLL interpreter has already " -"been cleaned up by the time this is called, and if your callback then jumps " -"into some HLL function)." +"L returns C if the handle cannot be created, and " +"because there is no handle if this happens there is no way to get additional " +"error information. However L is supposed to be a " +"lightweight operation which can only fail because of insufficient memory (it " +"returns NULL in this case)." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:1198 -msgid "guestfs_set_progress_callback" +#. type: =head2 +#: ../src/guestfs.pod:1388 +msgid "guestfs_last_error" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1200 +#. type: verbatim +#: ../src/guestfs.pod:1390 #, no-wrap msgid "" -" typedef void (*guestfs_progress_cb) (guestfs_h *g, void *opaque,\n" -" int proc_nr, int serial,\n" -" uint64_t position, uint64_t total);\n" -" void guestfs_set_progress_callback (guestfs_h *g,\n" -" guestfs_progress_cb cb,\n" -" void *opaque);\n" +" const char *guestfs_last_error (guestfs_h *g);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1207 +#. type: textblock +#: ../src/guestfs.pod:1392 msgid "" -"Some long-running operations can generate progress messages. If this " -"callback is registered, then it will be called each time a progress message " -"is generated (usually two seconds after the operation started, and three " -"times per second thereafter until it completes, although the frequency may " -"change in future versions)." +"This returns the last error message that happened on C. If there has not " +"been an error since the handle was created, then this returns C." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1213 +#. type: textblock +#: ../src/guestfs.pod:1396 msgid "" -"The callback receives two numbers: C and C. The units of " -"C are not defined, although for some operations C may relate " -"in some way to the amount of data to be transferred (eg. in bytes or " -"megabytes), and C may be the portion which has been transferred." +"The lifetime of the returned string is until the next error occurs, or " +"L is called." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1219 -msgid "The only defined and stable parts of the API are:" +#. type: =head2 +#: ../src/guestfs.pod:1399 +msgid "guestfs_last_errno" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1225 +#. type: verbatim +#: ../src/guestfs.pod:1401 +#, no-wrap msgid "" -"The callback can display to the user some type of progress bar or indicator " -"which shows the ratio of C:C." +" int guestfs_last_errno (guestfs_h *g);\n" +"\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1230 -msgid "0 E= C E= C" +#. type: textblock +#: ../src/guestfs.pod:1403 +msgid "This returns the last error number (errno) that happened on C." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1234 -msgid "" -"If any progress notification is sent during a call, then a final progress " -"notification is always sent when C = C." +#. type: textblock +#: ../src/guestfs.pod:1405 +msgid "If successful, an errno integer not equal to zero is returned." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1237 -msgid "" -"This is to simplify caller code, so callers can easily set the progress " -"indicator to \"100%\" at the end of the operation, without requiring special " -"code to detect this case." +#. type: textblock +#: ../src/guestfs.pod:1407 +msgid "If no error, this returns 0. This call can return 0 in three situations:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1243 +#. type: textblock +#: ../src/guestfs.pod:1414 +msgid "There has not been any error on the handle." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1418 msgid "" -"The callback also receives the procedure number and serial number of the " -"call. These are only useful for debugging protocol issues, and the callback " -"can normally ignore them. The callback may want to print these numbers in " -"error messages or debugging messages." +"There has been an error but the errno was meaningless. This corresponds to " +"the case where the error did not come from a failed system call, but for " +"some other reason." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:1248 -msgid "PRIVATE DATA AREA" +#. type: textblock +#: ../src/guestfs.pod:1424 +msgid "" +"There was an error from a failed system call, but for some reason the errno " +"was not captured and returned. This usually indicates a bug in libguestfs." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1250 +#. type: textblock +#: ../src/guestfs.pod:1430 msgid "" -"You can attach named pieces of private data to the libguestfs handle, and " -"fetch them by name for the lifetime of the handle. This is called the " -"private data area and is only available from the C API." +"Libguestfs tries to convert the errno from inside the applicance into a " +"corresponding errno for the caller (not entirely trivial: the appliance " +"might be running a completely different operating system from the library " +"and error numbers are not standardized across Un*xen). If this could not be " +"done, then the error is translated to C. In practice this should " +"only happen in very rare circumstances." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1254 -msgid "To attach a named piece of data, use the following call:" +#. type: =head2 +#: ../src/guestfs.pod:1438 +msgid "guestfs_set_error_handler" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1256 +#. type: verbatim +#: ../src/guestfs.pod:1440 #, no-wrap msgid "" -" void guestfs_set_private (guestfs_h *g, const char *key, void *data);\n" +" typedef void (*guestfs_error_handler_cb) (guestfs_h *g,\n" +" void *opaque,\n" +" const char *msg);\n" +" void guestfs_set_error_handler (guestfs_h *g,\n" +" guestfs_error_handler_cb cb,\n" +" void *opaque);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1258 +#. type: textblock +#: ../src/guestfs.pod:1447 msgid "" -"C is the name to associate with this data, and C is an arbitrary " -"pointer (which can be C). Any previous item with the same name is " -"overwritten." +"The callback C will be called if there is an error. The parameters " +"passed to the callback are an opaque data pointer and the error message " +"string." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1262 +#. type: textblock +#: ../src/guestfs.pod:1451 msgid "" -"You can use any C you want, but names beginning with an underscore " -"character are reserved for internal libguestfs purposes (for implementing " -"language bindings). It is recommended to prefix the name with some unique " -"string to avoid collisions with other users." +"C is not passed to the callback. To get that the callback must call " +"L." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1267 -msgid "To retrieve the pointer, use:" +#. type: textblock +#: ../src/guestfs.pod:1454 +msgid "" +"Note that the message string C is freed as soon as the callback " +"function returns, so if you want to stash it somewhere you must make your " +"own copy." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1269 -#, no-wrap -msgid "" -" void *guestfs_get_private (guestfs_h *g, const char *key);\n" -"\n" +#. type: textblock +#: ../src/guestfs.pod:1458 +msgid "The default handler prints messages on C." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1271 -msgid "" -"This function returns C if either no data is found associated with " -"C, or if the user previously set the C's C pointer to " -"C." +#. type: textblock +#: ../src/guestfs.pod:1460 +msgid "If you set C to C then I handler is called." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1275 -msgid "" -"Libguestfs does not try to look at or interpret the C pointer in any " -"way. As far as libguestfs is concerned, it need not be a valid pointer at " -"all. In particular, libguestfs does I try to free the data when the " -"handle is closed. If the data must be freed, then the caller must either " -"free it before calling L or must set up a close callback to " -"do it (see L, and note that only one callback " -"can be registered for a handle)." +#. type: =head2 +#: ../src/guestfs.pod:1462 +msgid "guestfs_get_error_handler" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1283 +#. type: verbatim +#: ../src/guestfs.pod:1464 +#, no-wrap msgid "" -"The private data area is implemented using a hash table, and should be " -"reasonably efficient for moderate numbers of keys." +" guestfs_error_handler_cb guestfs_get_error_handler (guestfs_h *g,\n" +" void **opaque_rtn);\n" +"\n" msgstr "" -# type: =head1 -#: ../src/guestfs.pod:1286 -msgid "BLOCK DEVICE NAMING" +#. type: textblock +#: ../src/guestfs.pod:1467 +msgid "Returns the current error handler callback." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1288 -msgid "" -"In the kernel there is now quite a profusion of schemata for naming block " -"devices (in this context, by I I mean a physical or virtual " -"hard drive). The original Linux IDE driver used names starting with " -"C. SCSI devices have historically used a different naming scheme, " -"C. When the Linux kernel I driver became a popular " -"replacement for the old IDE driver (particularly for SATA devices) those " -"devices also used the C scheme. Additionally we now have virtual " -"machines with paravirtualized drivers. This has created several different " -"naming systems, such as C for virtio disks and C for " -"Xen PV disks." +#. type: =head2 +#: ../src/guestfs.pod:1469 +msgid "guestfs_set_out_of_memory_handler" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1300 +#. type: verbatim +#: ../src/guestfs.pod:1471 +#, no-wrap msgid "" -"As discussed above, libguestfs uses a qemu appliance running an embedded " -"Linux kernel to access block devices. We can run a variety of appliances " -"based on a variety of Linux kernels." +" typedef void (*guestfs_abort_cb) (void);\n" +" int guestfs_set_out_of_memory_handler (guestfs_h *g,\n" +" guestfs_abort_cb);\n" +"\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1304 +#. type: textblock +#: ../src/guestfs.pod:1475 msgid "" -"This causes a problem for libguestfs because many API calls use device or " -"partition names. Working scripts and the recipe (example) scripts that we " -"make available over the internet could fail if the naming scheme changes." +"The callback C will be called if there is an out of memory situation. " +"I." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1309 -msgid "" -"Therefore libguestfs defines C as the I. " -"Internally C names are translated, if necessary, to other names as " -"required. For example, under RHEL 5 which uses the C scheme, any " -"device parameter C is translated to C transparently." +#. type: textblock +#: ../src/guestfs.pod:1478 +msgid "The default is to call L." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1315 -msgid "" -"Note that this I applies to parameters. The L, " -"L and similar calls return the true names of the " -"devices and partitions as known to the appliance." +#. type: textblock +#: ../src/guestfs.pod:1480 +msgid "You cannot set C to C. You can't ignore out of memory situations." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:1320 -msgid "ALGORITHM FOR BLOCK DEVICE NAME TRANSLATION" +#. type: =head2 +#: ../src/guestfs.pod:1483 +msgid "guestfs_get_out_of_memory_handler" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1322 +#. type: verbatim +#: ../src/guestfs.pod:1485 +#, no-wrap msgid "" -"Usually this translation is transparent. However in some (very rare) cases " -"you may need to know the exact algorithm. Such cases include where you use " -"L to add a mixture of virtio and IDE devices to the " -"qemu-based appliance, so have a mixture of C and C " -"devices." +" guestfs_abort_fn guestfs_get_out_of_memory_handler (guestfs_h *g);\n" +"\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1328 -msgid "" -"The algorithm is applied only to I which are known to be either " -"device or partition names. Return values from functions such as " -"L are never changed." +#. type: textblock +#: ../src/guestfs.pod:1487 +msgid "This returns the current out of memory handler." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1336 -msgid "Is the string a parameter which is a device or partition name?" +#. type: =head1 +#: ../src/guestfs.pod:1489 +msgid "API CALLS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1340 -msgid "Does the string begin with C?" +#. type: textblock +#: ../src/guestfs.pod:1491 ../fish/guestfish.pod:989 +msgid "@ACTIONS@" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1344 -msgid "" -"Does the named device exist? If so, we use that device. However if I " -"then we continue with this algorithm." +#. type: =head1 +#: ../src/guestfs.pod:1493 +msgid "STRUCTURES" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1349 -msgid "Replace initial C string with C." +#. type: textblock +#: ../src/guestfs.pod:1495 +msgid "@STRUCTS@" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1351 -msgid "For example, change C to C." +#. type: =head1 +#: ../src/guestfs.pod:1497 +msgid "AVAILABILITY" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1353 -msgid "If that named device exists, use it. If not, continue." +#. type: =head2 +#: ../src/guestfs.pod:1499 +msgid "GROUPS OF FUNCTIONALITY IN THE APPLIANCE" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1357 -msgid "Replace initial C string with C." +#. type: textblock +#: ../src/guestfs.pod:1501 +msgid "" +"Using L you can test availability of the following " +"groups of functions. This test queries the appliance to see if the " +"appliance you are currently using supports the functionality." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1359 -msgid "If that named device exists, use it. If not, return an error." +#. type: textblock +#: ../src/guestfs.pod:1506 +msgid "@AVAILABILITY@" msgstr "" -# type: =head2 -#: ../src/guestfs.pod:1363 -msgid "PORTABILITY CONCERNS" +#. type: =head2 +#: ../src/guestfs.pod:1508 +msgid "GUESTFISH supported COMMAND" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1365 +#. type: textblock +#: ../src/guestfs.pod:1510 msgid "" -"Although the standard naming scheme and automatic translation is useful for " -"simple programs and guestfish scripts, for larger programs it is best not to " -"rely on this mechanism." +"In L there is a handy interactive command C which " +"prints out the available groups and whether they are supported by this build " +"of libguestfs. Note however that you have to do C first." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1369 -msgid "" -"Where possible for maximum future portability programs using libguestfs " -"should use these future-proof techniques:" +#. type: =head2 +#: ../src/guestfs.pod:1515 +msgid "SINGLE CALLS AT COMPILE TIME" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1376 +#. type: textblock +#: ../src/guestfs.pod:1517 msgid "" -"Use L or L to list actual " -"device names, and then use those names directly." -msgstr "" - -# type: textblock -#: ../src/guestfs.pod:1379 -msgid "Since those device names exist by definition, they will never be translated." +"Since version 1.5.8, Cguestfs.hE> defines symbols for each C API " +"function, such as:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1384 +#. type: verbatim +#: ../src/guestfs.pod:1520 +#, no-wrap msgid "" -"Use higher level ways to identify filesystems, such as LVM names, UUIDs and " -"filesystem labels." +" #define LIBGUESTFS_HAVE_DD 1\n" +"\n" msgstr "" -# type: =head1 -#: ../src/guestfs.pod:1389 -msgid "INTERNALS" +#. type: textblock +#: ../src/guestfs.pod:1522 +msgid "if L is available." msgstr "" -# type: =head2 -#: ../src/guestfs.pod:1391 -msgid "COMMUNICATION PROTOCOL" +#. type: textblock +#: ../src/guestfs.pod:1524 +msgid "" +"Before version 1.5.8, if you needed to test whether a single libguestfs " +"function is available at compile time, we recommended using build tools such " +"as autoconf or cmake. For example in autotools you could use:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1393 +#. type: verbatim +#: ../src/guestfs.pod:1529 +#, no-wrap msgid "" -"Don't rely on using this protocol directly. This section documents how it " -"currently works, but it may change at any time." +" AC_CHECK_LIB([guestfs],[guestfs_create])\n" +" AC_CHECK_FUNCS([guestfs_dd])\n" +"\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1396 +#. type: textblock +#: ../src/guestfs.pod:1532 msgid "" -"The protocol used to talk between the library and the daemon running inside " -"the qemu virtual machine is a simple RPC mechanism built on top of XDR (RFC " -"1014, RFC 1832, RFC 4506)." +"which would result in C being either defined or not defined " +"in your program." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1400 -msgid "" -"The detailed format of structures is in C (note: " -"this file is automatically generated)." +#. type: =head2 +#: ../src/guestfs.pod:1535 +msgid "SINGLE CALLS AT RUN TIME" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1403 +#. type: textblock +#: ../src/guestfs.pod:1537 msgid "" -"There are two broad cases, ordinary functions that don't have any C " -"and C parameters, which are handled with very simple request/reply " -"messages. Then there are functions that have any C or C " -"parameters, which use the same request and reply messages, but they may also " -"be followed by files sent using a chunked encoding." -msgstr "" - -# type: =head3 -#: ../src/guestfs.pod:1410 -msgid "ORDINARY FUNCTIONS (NO FILEIN/FILEOUT PARAMS)" +"Testing at compile time doesn't guarantee that a function really exists in " +"the library. The reason is that you might be dynamically linked against a " +"previous I (dynamic library) which doesn't have the call. " +"This situation unfortunately results in a segmentation fault, which is a " +"shortcoming of the C dynamic linking system itself." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1412 -msgid "For ordinary functions, the request message is:" +#. type: textblock +#: ../src/guestfs.pod:1544 +msgid "" +"You can use L to test if a function is available at run time, as " +"in this example program (note that you still need the compile time check as " +"well):" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1414 +#. type: verbatim +#: ../src/guestfs.pod:1548 #, no-wrap msgid "" -" total length (header + arguments,\n" -" but not including the length word itself)\n" -" struct guestfs_message_header (encoded as XDR)\n" -" struct guestfs__args (encoded as XDR)\n" -"\n" +" #include \n" +" #include \n" +" #include \n" +" #include \n" +" #include \n" +" \n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1419 +#. type: verbatim +#: ../src/guestfs.pod:1554 +#, no-wrap msgid "" -"The total length field allows the daemon to allocate a fixed size buffer " -"into which it slurps the rest of the message. As a result, the total length " -"is limited to C bytes (currently 4MB), which means the " -"effective size of any request is limited to somewhere under this size." +" main ()\n" +" {\n" +" #ifdef LIBGUESTFS_HAVE_DD\n" +" void *dl;\n" +" int has_function;\n" +" \n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1425 +#. type: verbatim +#: ../src/guestfs.pod:1560 +#, no-wrap msgid "" -"Note also that many functions don't take any arguments, in which case the " -"C_args> is completely omitted." +" /* Test if the function guestfs_dd is really available. */\n" +" dl = dlopen (NULL, RTLD_LAZY);\n" +" if (!dl) {\n" +" fprintf (stderr, \"dlopen: %s\\n\", dlerror ());\n" +" exit (EXIT_FAILURE);\n" +" }\n" +" has_function = dlsym (dl, \"guestfs_dd\") != NULL;\n" +" dlclose (dl);\n" +" \n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1428 +#. type: verbatim +#: ../src/guestfs.pod:1569 +#, no-wrap msgid "" -"The header contains the procedure number (C) which is how the " -"receiver knows what type of args structure to expect, or none at all." +" if (!has_function)\n" +" printf (\"this libguestfs.so does NOT have guestfs_dd function\\n\");\n" +" else {\n" +" printf (\"this libguestfs.so has guestfs_dd function\\n\");\n" +" /* Now it's safe to call\n" +" guestfs_dd (g, \"foo\", \"bar\");\n" +" */\n" +" }\n" +" #else\n" +" printf (\"guestfs_dd function was not found at compile time\\n\");\n" +" #endif\n" +" }\n" +"\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1432 -msgid "The reply message for ordinary functions is:" +#. type: textblock +#: ../src/guestfs.pod:1582 +msgid "" +"You may think the above is an awful lot of hassle, and it is. There are " +"other ways outside of the C linking system to ensure that this kind of " +"incompatibility never arises, such as using package versioning:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1434 +#. type: verbatim +#: ../src/guestfs.pod:1587 #, no-wrap msgid "" -" total length (header + ret,\n" -" but not including the length word itself)\n" -" struct guestfs_message_header (encoded as XDR)\n" -" struct guestfs__ret (encoded as XDR)\n" +" Requires: libguestfs >= 1.0.80\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1439 -msgid "" -"As above the C_ret> structure may be completely omitted for " -"functions that return no formal return values." -msgstr "" - -# type: textblock -#: ../src/guestfs.pod:1442 -msgid "As above the total length of the reply is limited to C." +#. type: =head1 +#: ../src/guestfs.pod:1589 +msgid "CALLS WITH OPTIONAL ARGUMENTS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1445 +#. type: textblock +#: ../src/guestfs.pod:1591 msgid "" -"In the case of an error, a flag is set in the header, and the reply message " -"is slightly changed:" +"A recent feature of the API is the introduction of calls which take optional " +"arguments. In C these are declared 3 ways. The main way is as a call which " +"takes variable arguments (ie. C<...>), as in this example:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1448 +#. type: verbatim +#: ../src/guestfs.pod:1596 #, no-wrap msgid "" -" total length (header + error,\n" -" but not including the length word itself)\n" -" struct guestfs_message_header (encoded as XDR)\n" -" struct guestfs_message_error (encoded as XDR)\n" +" int guestfs_add_drive_opts (guestfs_h *g, const char *filename, ...);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1453 +#. type: textblock +#: ../src/guestfs.pod:1598 msgid "" -"The C structure contains the error message as a " -"string." +"Call this with a list of optional arguments, terminated by C<-1>. So to " +"call with no optional arguments specified:" msgstr "" -# type: =head3 -#: ../src/guestfs.pod:1456 -msgid "FUNCTIONS THAT HAVE FILEIN PARAMETERS" +#. type: verbatim +#: ../src/guestfs.pod:1601 +#, no-wrap +msgid "" +" guestfs_add_drive_opts (g, filename, -1);\n" +"\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1458 -msgid "" -"A C parameter indicates that we transfer a file I the guest. " -"The normal request message is sent (see above). However this is followed by " -"a sequence of file chunks." +#. type: textblock +#: ../src/guestfs.pod:1603 +msgid "With a single optional argument:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1462 +#. type: verbatim +#: ../src/guestfs.pod:1605 #, no-wrap msgid "" -" total length (header + arguments,\n" -" but not including the length word itself,\n" -" and not including the chunks)\n" -" struct guestfs_message_header (encoded as XDR)\n" -" struct guestfs__args (encoded as XDR)\n" -" sequence of chunks for FileIn param #0\n" -" sequence of chunks for FileIn param #1 etc.\n" +" guestfs_add_drive_opts (g, filename,\n" +" GUESTFS_ADD_DRIVE_OPTS_FORMAT, \"qcow2\",\n" +" -1);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1470 -msgid "The \"sequence of chunks\" is:" +#. type: textblock +#: ../src/guestfs.pod:1609 +msgid "With two:" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1472 +#. type: verbatim +#: ../src/guestfs.pod:1611 #, no-wrap msgid "" -" length of chunk (not including length word itself)\n" -" struct guestfs_chunk (encoded as XDR)\n" -" length of chunk\n" -" struct guestfs_chunk (encoded as XDR)\n" -" ...\n" -" length of chunk\n" -" struct guestfs_chunk (with data.data_len == 0)\n" +" guestfs_add_drive_opts (g, filename,\n" +" GUESTFS_ADD_DRIVE_OPTS_FORMAT, \"qcow2\",\n" +" GUESTFS_ADD_DRIVE_OPTS_READONLY, 1,\n" +" -1);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1480 +#. type: textblock +#: ../src/guestfs.pod:1616 msgid "" -"The final chunk has the C field set to zero. Additionally a flag " -"is set in the final chunk to indicate either successful completion or early " -"cancellation." +"and so forth. Don't forget the terminating C<-1> otherwise Bad Things will " +"happen!" +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:1619 +msgid "USING va_list FOR OPTIONAL ARGUMENTS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1484 +#. type: textblock +#: ../src/guestfs.pod:1621 msgid "" -"At time of writing there are no functions that have more than one FileIn " -"parameter. However this is (theoretically) supported, by sending the " -"sequence of chunks for each FileIn parameter one after another (from left to " -"right)." +"The second variant has the same name with the suffix C<_va>, which works the " +"same way but takes a C. See the C manual for details. For the " +"example function, this is declared:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1489 +#. type: verbatim +#: ../src/guestfs.pod:1625 +#, no-wrap msgid "" -"Both the library (sender) I the daemon (receiver) may cancel the " -"transfer. The library does this by sending a chunk with a special flag set " -"to indicate cancellation. When the daemon sees this, it cancels the whole " -"RPC, does I send any reply, and goes back to reading the next request." +" int guestfs_add_drive_opts_va (guestfs_h *g, const char *filename,\n" +" va_list args);\n" +"\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1495 +#. type: =head2 +#: ../src/guestfs.pod:1628 +msgid "CONSTRUCTING OPTIONAL ARGUMENTS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1630 msgid "" -"The daemon may also cancel. It does this by writing a special word " -"C to the socket. The library listens for this during " -"the transfer, and if it gets it, it will cancel the transfer (it sends a " -"cancel chunk). The special word is chosen so that even if cancellation " -"happens right at the end of the transfer (after the library has finished " -"writing and has started listening for the reply), the \"spurious\" cancel " -"flag will not be confused with the reply message." +"The third variant is useful where you need to construct these calls. You " +"pass in a structure where you fill in the optional fields. The structure " +"has a bitmask as the first element which you must set to indicate which " +"fields you have filled in. For our example function the structure and call " +"are declared:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1504 +#. type: verbatim +#: ../src/guestfs.pod:1636 +#, no-wrap msgid "" -"This protocol allows the transfer of arbitrary sized files (no 32 bit " -"limit), and also files where the size is not known in advance (eg. from " -"pipes or sockets). However the chunks are rather small " -"(C), so that neither the library nor the daemon need " -"to keep much in memory." +" struct guestfs_add_drive_opts_argv {\n" +" uint64_t bitmask;\n" +" int readonly;\n" +" const char *format;\n" +" /* ... */\n" +" };\n" +" int guestfs_add_drive_opts_argv (guestfs_h *g, const char *filename,\n" +" const struct guestfs_add_drive_opts_argv *optargs);\n" +"\n" msgstr "" -# type: =head3 -#: ../src/guestfs.pod:1510 -msgid "FUNCTIONS THAT HAVE FILEOUT PARAMETERS" +#. type: textblock +#: ../src/guestfs.pod:1645 +msgid "You could call it like this:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1512 +#. type: verbatim +#: ../src/guestfs.pod:1647 +#, no-wrap msgid "" -"The protocol for FileOut parameters is exactly the same as for FileIn " -"parameters, but with the roles of daemon and library reversed." +" struct guestfs_add_drive_opts_argv optargs = {\n" +" .bitmask = GUESTFS_ADD_DRIVE_OPTS_READONLY_BITMASK |\n" +" GUESTFS_ADD_DRIVE_OPTS_FORMAT_BITMASK,\n" +" .readonly = 1,\n" +" .format = \"qcow2\"\n" +" };\n" +" \n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1515 +#. type: verbatim +#: ../src/guestfs.pod:1654 #, no-wrap msgid "" -" total length (header + ret,\n" -" but not including the length word itself,\n" -" and not including the chunks)\n" -" struct guestfs_message_header (encoded as XDR)\n" -" struct guestfs__ret (encoded as XDR)\n" -" sequence of chunks for FileOut param #0\n" -" sequence of chunks for FileOut param #1 etc.\n" +" guestfs_add_drive_opts_argv (g, filename, &optargs);\n" "\n" msgstr "" -# type: =head3 -#: ../src/guestfs.pod:1523 -msgid "INITIAL MESSAGE" +#. type: textblock +#: ../src/guestfs.pod:1656 ../src/guestfs-actions.pod:11 ../src/guestfs-actions.pod:1850 ../fish/guestfish-actions.pod:9 ../fish/guestfish-actions.pod:1260 ../tools/virt-win-reg.pl:532 +msgid "Notes:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1525 -msgid "" -"When the daemon launches it sends an initial word (C) " -"which indicates that the guest and daemon is alive. This is what " -"L waits for." +#. type: textblock +#: ../src/guestfs.pod:1662 +msgid "The C<_BITMASK> suffix on each option name when specifying the bitmask." msgstr "" -# type: =head3 -#: ../src/guestfs.pod:1529 -msgid "PROGRESS NOTIFICATION MESSAGES" +#. type: textblock +#: ../src/guestfs.pod:1667 +msgid "You do not need to fill in all fields of the structure." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1531 +#. type: textblock +#: ../src/guestfs.pod:1671 msgid "" -"The daemon may send progress notification messages at any time. These are " -"distinguished by the normal length word being replaced by " -"C, followed by a fixed size progress message." +"There must be a one-to-one correspondence between fields of the structure " +"that are filled in, and bits set in the bitmask." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1535 -msgid "" -"The library turns them into progress callbacks (see " -"C) if there is a callback registered, or " -"discards them if not." +#. type: =head2 +#: ../src/guestfs.pod:1676 +msgid "OPTIONAL ARGUMENTS IN OTHER LANGUAGES" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1539 +#. type: textblock +#: ../src/guestfs.pod:1678 msgid "" -"The daemon self-limits the frequency of progress messages it sends (see " -"C). Not all calls generate progress " -"messages." +"In other languages, optional arguments are expressed in the way that is " +"natural for that language. We refer you to the language-specific " +"documentation for more details on that." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:1543 -msgid "MULTIPLE HANDLES AND MULTIPLE THREADS" +#. type: textblock +#: ../src/guestfs.pod:1682 +msgid "For guestfish, see L." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:1684 +msgid "SETTING CALLBACKS TO HANDLE EVENTS" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1545 +#. type: textblock +#: ../src/guestfs.pod:1686 msgid "" -"All high-level libguestfs actions are synchronous. If you want to use " -"libguestfs asynchronously then you must create a thread." +"The child process generates events in some situations. Current events " +"include: receiving a log message, the child process exits." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1548 +#. type: textblock +#: ../src/guestfs.pod:1689 msgid "" -"Only use the handle from a single thread. Either use the handle exclusively " -"from one thread, or provide your own mutex so that two threads cannot issue " -"calls on the same handle at the same time." +"Use the C functions to set a callback for different " +"types of events." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1552 +#. type: textblock +#: ../src/guestfs.pod:1692 msgid "" -"See the graphical program guestfs-browser for one possible architecture for " -"multithreaded programs using libvirt and libguestfs." +"Only I can be registered for each handle. " +"Calling C again overwrites the previous callback of " +"that type. Cancel all callbacks of this type by calling this function with " +"C set to C." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:1555 -msgid "QEMU WRAPPERS" +#. type: =head2 +#: ../src/guestfs.pod:1697 +msgid "guestfs_set_log_message_callback" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1557 +#. type: verbatim +#: ../src/guestfs.pod:1699 +#, no-wrap msgid "" -"If you want to compile your own qemu, run qemu from a non-standard location, " -"or pass extra arguments to qemu, then you can write a shell-script wrapper " -"around qemu." +" typedef void (*guestfs_log_message_cb) (guestfs_h *g, void *opaque,\n" +" char *buf, int len);\n" +" void guestfs_set_log_message_callback (guestfs_h *g,\n" +" guestfs_log_message_cb cb,\n" +" void *opaque);\n" +"\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1561 +#. type: textblock +#: ../src/guestfs.pod:1705 msgid "" -"There is one important rule to remember: you I> as the " -"last command in the shell script (so that qemu replaces the shell and " -"becomes the direct child of the libguestfs-using program). If you don't do " -"this, then the qemu process won't be cleaned up correctly." +"The callback function C will be called whenever qemu or the guest writes " +"anything to the console." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1566 -msgid "" -"Here is an example of a wrapper, where I have built my own copy of qemu from " -"source:" +#. type: textblock +#: ../src/guestfs.pod:1708 +msgid "Use this function to capture kernel messages and similar." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1569 -#, no-wrap +#. type: textblock +#: ../src/guestfs.pod:1710 msgid "" -" #!/bin/sh -\n" -" qemudir=/home/rjones/d/qemu\n" -" exec $qemudir/x86_64-softmmu/qemu-system-x86_64 -L $qemudir/pc-bios " -"\"$@\"\n" -"\n" +"Normally there is no log message handler, and log messages are just " +"discarded." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:1713 +msgid "guestfs_set_subprocess_quit_callback" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1715 +#, no-wrap +msgid "" +" typedef void (*guestfs_subprocess_quit_cb) (guestfs_h *g, void *opaque);\n" +" void guestfs_set_subprocess_quit_callback (guestfs_h *g,\n" +" guestfs_subprocess_quit_cb cb,\n" +" void *opaque);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1720 +msgid "" +"The callback function C will be called when the child process quits, " +"either asynchronously or if killed by L. (This " +"corresponds to a transition from any state to the CONFIG state)." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:1725 +msgid "guestfs_set_launch_done_callback" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1727 +#, no-wrap +msgid "" +" typedef void (*guestfs_launch_done_cb) (guestfs_h *g, void *opaque);\n" +" void guestfs_set_launch_done_callback (guestfs_h *g,\n" +" guestfs_launch_done_cb cb,\n" +" void *opaque);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1732 +msgid "" +"The callback function C will be called when the child process becomes " +"ready first time after it has been launched. (This corresponds to a " +"transition from LAUNCHING to the READY state)." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:1736 +msgid "guestfs_set_close_callback" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1738 +#, no-wrap +msgid "" +" typedef void (*guestfs_close_cb) (guestfs_h *g, void *opaque);\n" +" void guestfs_set_close_callback (guestfs_h *g,\n" +" guestfs_close_cb cb,\n" +" void *opaque);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1743 +msgid "" +"The callback function C will be called while the handle is being closed " +"(synchronously from L)." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1746 +msgid "" +"Note that libguestfs installs an L handler to try to clean up " +"handles that are open when the program exits. This means that this callback " +"might be called indirectly from L, which can cause unexpected " +"problems in higher-level languages (eg. if your HLL interpreter has already " +"been cleaned up by the time this is called, and if your callback then jumps " +"into some HLL function)." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:1754 +msgid "guestfs_set_progress_callback" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1756 +#, no-wrap +msgid "" +" typedef void (*guestfs_progress_cb) (guestfs_h *g, void *opaque,\n" +" int proc_nr, int serial,\n" +" uint64_t position, uint64_t total);\n" +" void guestfs_set_progress_callback (guestfs_h *g,\n" +" guestfs_progress_cb cb,\n" +" void *opaque);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1763 +msgid "" +"Some long-running operations can generate progress messages. If this " +"callback is registered, then it will be called each time a progress message " +"is generated (usually two seconds after the operation started, and three " +"times per second thereafter until it completes, although the frequency may " +"change in future versions)." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1769 +msgid "" +"The callback receives two numbers: C and C. The units of " +"C are not defined, although for some operations C may relate " +"in some way to the amount of data to be transferred (eg. in bytes or " +"megabytes), and C may be the portion which has been transferred." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1775 +msgid "The only defined and stable parts of the API are:" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1781 +msgid "" +"The callback can display to the user some type of progress bar or indicator " +"which shows the ratio of C:C." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1786 +msgid "0 E= C E= C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1790 +msgid "" +"If any progress notification is sent during a call, then a final progress " +"notification is always sent when C = C." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1793 +msgid "" +"This is to simplify caller code, so callers can easily set the progress " +"indicator to \"100%\" at the end of the operation, without requiring special " +"code to detect this case." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1799 +msgid "" +"The callback also receives the procedure number and serial number of the " +"call. These are only useful for debugging protocol issues, and the callback " +"can normally ignore them. The callback may want to print these numbers in " +"error messages or debugging messages." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:1804 +msgid "PRIVATE DATA AREA" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1806 +msgid "" +"You can attach named pieces of private data to the libguestfs handle, and " +"fetch them by name for the lifetime of the handle. This is called the " +"private data area and is only available from the C API." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1810 +msgid "To attach a named piece of data, use the following call:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1812 +#, no-wrap +msgid "" +" void guestfs_set_private (guestfs_h *g, const char *key, void *data);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1814 +msgid "" +"C is the name to associate with this data, and C is an arbitrary " +"pointer (which can be C). Any previous item with the same name is " +"overwritten." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1818 +msgid "" +"You can use any C you want, but names beginning with an underscore " +"character are reserved for internal libguestfs purposes (for implementing " +"language bindings). It is recommended to prefix the name with some unique " +"string to avoid collisions with other users." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1823 +msgid "To retrieve the pointer, use:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1825 +#, no-wrap +msgid "" +" void *guestfs_get_private (guestfs_h *g, const char *key);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1827 +msgid "" +"This function returns C if either no data is found associated with " +"C, or if the user previously set the C's C pointer to " +"C." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1831 +msgid "" +"Libguestfs does not try to look at or interpret the C pointer in any " +"way. As far as libguestfs is concerned, it need not be a valid pointer at " +"all. In particular, libguestfs does I try to free the data when the " +"handle is closed. If the data must be freed, then the caller must either " +"free it before calling L or must set up a close callback to " +"do it (see L, and note that only one callback " +"can be registered for a handle)." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1839 +msgid "" +"The private data area is implemented using a hash table, and should be " +"reasonably efficient for moderate numbers of keys." +msgstr "" + +#. type: =end +#: ../src/guestfs.pod:1842 ../src/guestfs.pod:1847 +msgid "html" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1844 +msgid "" +" " +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:1849 +msgid "ARCHITECTURE" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1851 +msgid "" +"Internally, libguestfs is implemented by running an appliance (a special " +"type of small virtual machine) using L. Qemu runs as a child " +"process of the main program." +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1855 +#, no-wrap +msgid "" +" ___________________\n" +" / \\\n" +" | main program |\n" +" | |\n" +" | | child process / appliance\n" +" | | __________________________\n" +" | | / qemu \\\n" +" +-------------------+ RPC | +-----------------+ |\n" +" | libguestfs <--------------------> guestfsd | |\n" +" | | | +-----------------+ |\n" +" \\___________________/ | | Linux kernel | |\n" +" | +--^--------------+ |\n" +" \\_________|________________/\n" +" |\n" +" _______v______\n" +" / \\\n" +" | Device or |\n" +" | disk image |\n" +" \\______________/\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1875 +msgid "" +"The library, linked to the main program, creates the child process and hence " +"the appliance in the L function." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1878 +msgid "" +"Inside the appliance is a Linux kernel and a complete stack of userspace " +"tools (such as LVM and ext2 programs) and a small controlling daemon called " +"L. The library talks to L using remote procedure " +"calls (RPC). There is a mostly one-to-one correspondence between libguestfs " +"API calls and RPC calls to the daemon. Lastly the disk image(s) are " +"attached to the qemu process which translates device access by the " +"appliance's Linux kernel into accesses to the image." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1887 +msgid "" +"A common misunderstanding is that the appliance \"is\" the virtual machine. " +"Although the disk image you are attached to might also be used by some " +"virtual machine, libguestfs doesn't know or care about this. (But you will " +"care if both libguestfs's qemu process and your virtual machine are trying " +"to update the disk image at the same time, since these usually results in " +"massive disk corruption)." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:1894 +msgid "STATE MACHINE" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1896 +msgid "libguestfs uses a state machine to model the child process:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1898 +#, no-wrap +msgid "" +" |\n" +" guestfs_create\n" +" |\n" +" |\n" +" ____V_____\n" +" / \\\n" +" | CONFIG |\n" +" \\__________/\n" +" ^ ^ ^ \\\n" +" / | \\ \\ guestfs_launch\n" +" / | _\\__V______\n" +" / | / \\\n" +" / | | LAUNCHING |\n" +" / | \\___________/\n" +" / | /\n" +" / | guestfs_launch\n" +" / | /\n" +" ______ / __|____V\n" +" / \\ ------> / \\\n" +" | BUSY | | READY |\n" +" \\______/ <------ \\________/\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1920 +msgid "" +"The normal transitions are (1) CONFIG (when the handle is created, but there " +"is no child process), (2) LAUNCHING (when the child process is booting up), " +"(3) alternating between READY and BUSY as commands are issued to, and " +"carried out by, the child process." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1925 +msgid "" +"The guest may be killed by L, or may die " +"asynchronously at any time (eg. due to some internal error), and that causes " +"the state to transition back to CONFIG." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1929 +msgid "" +"Configuration commands for qemu such as L can only be " +"issued when in the CONFIG state." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1932 +msgid "" +"The API offers one call that goes from CONFIG through LAUNCHING to READY. " +"L blocks until the child process is READY to accept " +"commands (or until some failure or timeout). L internally " +"moves the state from CONFIG to LAUNCHING while it is running." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1938 +msgid "" +"API actions such as L can only be issued when in the READY " +"state. These API calls block waiting for the command to be carried out " +"(ie. the state to transition to BUSY and then back to READY). There are no " +"non-blocking versions, and no way to issue more than one command per handle " +"at the same time." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1944 +msgid "" +"Finally, the child process sends asynchronous messages back to the main " +"program, such as kernel log messages. You can register a callback to " +"receive these messages." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:1948 +msgid "INTERNALS" +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:1950 +msgid "COMMUNICATION PROTOCOL" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1952 +msgid "" +"Don't rely on using this protocol directly. This section documents how it " +"currently works, but it may change at any time." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1955 +msgid "" +"The protocol used to talk between the library and the daemon running inside " +"the qemu virtual machine is a simple RPC mechanism built on top of XDR (RFC " +"1014, RFC 1832, RFC 4506)." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1959 +msgid "" +"The detailed format of structures is in C (note: " +"this file is automatically generated)." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1962 +msgid "" +"There are two broad cases, ordinary functions that don't have any C " +"and C parameters, which are handled with very simple request/reply " +"messages. Then there are functions that have any C or C " +"parameters, which use the same request and reply messages, but they may also " +"be followed by files sent using a chunked encoding." +msgstr "" + +#. type: =head3 +#: ../src/guestfs.pod:1969 +msgid "ORDINARY FUNCTIONS (NO FILEIN/FILEOUT PARAMS)" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1971 +msgid "For ordinary functions, the request message is:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:1973 +#, no-wrap +msgid "" +" total length (header + arguments,\n" +" but not including the length word itself)\n" +" struct guestfs_message_header (encoded as XDR)\n" +" struct guestfs__args (encoded as XDR)\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1978 +msgid "" +"The total length field allows the daemon to allocate a fixed size buffer " +"into which it slurps the rest of the message. As a result, the total length " +"is limited to C bytes (currently 4MB), which means the " +"effective size of any request is limited to somewhere under this size." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1984 +msgid "" +"Note also that many functions don't take any arguments, in which case the " +"C_args> is completely omitted." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1987 +msgid "" +"The header contains the procedure number (C) which is how the " +"receiver knows what type of args structure to expect, or none at all." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1991 +msgid "" +"For functions that take optional arguments, the optional arguments are " +"encoded in the C_args> structure in the same way as ordinary " +"arguments. A bitmask in the header indicates which optional arguments are " +"meaningful. The bitmask is also checked to see if it contains bits set " +"which the daemon does not know about (eg. if more optional arguments were " +"added in a later version of the library), and this causes the call to be " +"rejected." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:1999 +msgid "The reply message for ordinary functions is:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2001 +#, no-wrap +msgid "" +" total length (header + ret,\n" +" but not including the length word itself)\n" +" struct guestfs_message_header (encoded as XDR)\n" +" struct guestfs__ret (encoded as XDR)\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2006 +msgid "" +"As above the C_ret> structure may be completely omitted for " +"functions that return no formal return values." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2009 +msgid "As above the total length of the reply is limited to C." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2012 +msgid "" +"In the case of an error, a flag is set in the header, and the reply message " +"is slightly changed:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2015 +#, no-wrap +msgid "" +" total length (header + error,\n" +" but not including the length word itself)\n" +" struct guestfs_message_header (encoded as XDR)\n" +" struct guestfs_message_error (encoded as XDR)\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2020 +msgid "" +"The C structure contains the error message as a " +"string." +msgstr "" + +#. type: =head3 +#: ../src/guestfs.pod:2023 +msgid "FUNCTIONS THAT HAVE FILEIN PARAMETERS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2025 +msgid "" +"A C parameter indicates that we transfer a file I the guest. " +"The normal request message is sent (see above). However this is followed by " +"a sequence of file chunks." +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2029 +#, no-wrap +msgid "" +" total length (header + arguments,\n" +" but not including the length word itself,\n" +" and not including the chunks)\n" +" struct guestfs_message_header (encoded as XDR)\n" +" struct guestfs__args (encoded as XDR)\n" +" sequence of chunks for FileIn param #0\n" +" sequence of chunks for FileIn param #1 etc.\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2037 +msgid "The \"sequence of chunks\" is:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2039 +#, no-wrap +msgid "" +" length of chunk (not including length word itself)\n" +" struct guestfs_chunk (encoded as XDR)\n" +" length of chunk\n" +" struct guestfs_chunk (encoded as XDR)\n" +" ...\n" +" length of chunk\n" +" struct guestfs_chunk (with data.data_len == 0)\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2047 +msgid "" +"The final chunk has the C field set to zero. Additionally a flag " +"is set in the final chunk to indicate either successful completion or early " +"cancellation." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2051 +msgid "" +"At time of writing there are no functions that have more than one FileIn " +"parameter. However this is (theoretically) supported, by sending the " +"sequence of chunks for each FileIn parameter one after another (from left to " +"right)." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2056 +msgid "" +"Both the library (sender) I the daemon (receiver) may cancel the " +"transfer. The library does this by sending a chunk with a special flag set " +"to indicate cancellation. When the daemon sees this, it cancels the whole " +"RPC, does I send any reply, and goes back to reading the next request." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2062 +msgid "" +"The daemon may also cancel. It does this by writing a special word " +"C to the socket. The library listens for this during " +"the transfer, and if it gets it, it will cancel the transfer (it sends a " +"cancel chunk). The special word is chosen so that even if cancellation " +"happens right at the end of the transfer (after the library has finished " +"writing and has started listening for the reply), the \"spurious\" cancel " +"flag will not be confused with the reply message." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2071 +msgid "" +"This protocol allows the transfer of arbitrary sized files (no 32 bit " +"limit), and also files where the size is not known in advance (eg. from " +"pipes or sockets). However the chunks are rather small " +"(C), so that neither the library nor the daemon need " +"to keep much in memory." +msgstr "" + +#. type: =head3 +#: ../src/guestfs.pod:2077 +msgid "FUNCTIONS THAT HAVE FILEOUT PARAMETERS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2079 +msgid "" +"The protocol for FileOut parameters is exactly the same as for FileIn " +"parameters, but with the roles of daemon and library reversed." +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2082 +#, no-wrap +msgid "" +" total length (header + ret,\n" +" but not including the length word itself,\n" +" and not including the chunks)\n" +" struct guestfs_message_header (encoded as XDR)\n" +" struct guestfs__ret (encoded as XDR)\n" +" sequence of chunks for FileOut param #0\n" +" sequence of chunks for FileOut param #1 etc.\n" +"\n" +msgstr "" + +#. type: =head3 +#: ../src/guestfs.pod:2090 +msgid "INITIAL MESSAGE" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2092 +msgid "" +"When the daemon launches it sends an initial word (C) " +"which indicates that the guest and daemon is alive. This is what " +"L waits for." +msgstr "" + +#. type: =head3 +#: ../src/guestfs.pod:2096 +msgid "PROGRESS NOTIFICATION MESSAGES" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2098 +msgid "" +"The daemon may send progress notification messages at any time. These are " +"distinguished by the normal length word being replaced by " +"C, followed by a fixed size progress message." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2102 +msgid "" +"The library turns them into progress callbacks (see " +"C) if there is a callback registered, or " +"discards them if not." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2106 +msgid "" +"The daemon self-limits the frequency of progress messages it sends (see " +"C). Not all calls generate progress " +"messages." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:2110 +msgid "LIBGUESTFS VERSION NUMBERS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2112 +msgid "" +"Since April 2010, libguestfs has started to make separate development and " +"stable releases, along with corresponding branches in our git repository. " +"These separate releases can be identified by version number:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2117 +#, no-wrap +msgid "" +" even numbers for stable: 1.2.x, 1.4.x, ...\n" +" .-------- odd numbers for development: 1.3.x, 1.5.x, ...\n" +" |\n" +" v\n" +" 1 . 3 . 5\n" +" ^ ^\n" +" | |\n" +" | `-------- sub-version\n" +" |\n" +" `------ always '1' because we don't change the ABI\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2128 +msgid "Thus \"1.3.5\" is the 5th update to the development branch \"1.3\"." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2130 +msgid "" +"As time passes we cherry pick fixes from the development branch and backport " +"those into the stable branch, the effect being that the stable branch should " +"get more stable and less buggy over time. So the stable releases are ideal " +"for people who don't need new features but would just like the software to " +"work." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2136 +msgid "Our criteria for backporting changes are:" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2142 +msgid "" +"Documentation changes which don't affect any code are backported unless the " +"documentation refers to a future feature which is not in stable." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2148 +msgid "" +"Bug fixes which are not controversial, fix obvious problems, and have been " +"well tested are backported." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2153 +msgid "" +"Simple rearrangements of code which shouldn't affect how it works get " +"backported. This is so that the code in the two branches doesn't get too " +"far out of step, allowing us to backport future fixes more easily." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2159 +msgid "" +"We I backport new features, new APIs, new tools etc, except in one " +"exceptional case: the new feature is required in order to implement an " +"important bug fix." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2165 +msgid "" +"A new stable branch starts when we think the new features in development are " +"substantial and compelling enough over the current stable branch to warrant " +"it. When that happens we create new stable and development versions 1.N.0 " +"and 1.(N+1).0 [N is even]. The new dot-oh release won't necessarily be so " +"stable at this point, but by backporting fixes from development, that branch " +"will stabilize over time." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:2173 +msgid "EXTENDING LIBGUESTFS" +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:2175 +msgid "ADDING A NEW API ACTION" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2177 +msgid "" +"Large amounts of boilerplate code in libguestfs (RPC, bindings, " +"documentation) are generated, and this makes it easy to extend the " +"libguestfs API." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2181 +msgid "To add a new API action there are two changes:" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2187 +msgid "" +"You need to add a description of the call (name, parameters, return type, " +"tests, documentation) to C." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2190 +msgid "" +"There are two sorts of API action, depending on whether the call goes " +"through to the daemon in the appliance, or is serviced entirely by the " +"library (see L above). L is an example of the " +"former, since the sync is done in the appliance. L is " +"an example of the latter, since a trace flag is maintained in the handle and " +"all tracing is done on the library side." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2198 +msgid "" +"Most new actions are of the first type, and get added to the " +"C list. Each function has a unique procedure number used " +"in the RPC protocol which is assigned to that action when we publish " +"libguestfs and cannot be reused. Take the latest procedure number and " +"increment it." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2204 +msgid "" +"For library-only actions of the second type, add to the " +"C list. Since these functions are serviced by the " +"library and do not travel over the RPC mechanism to the daemon, these " +"functions do not need a procedure number, and so the procedure number is set " +"to C<-1>." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2212 +msgid "Implement the action (in C):" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2214 +msgid "" +"For daemon actions, implement the function CnameE> in the " +"C directory." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2217 +msgid "" +"For library actions, implement the function CnameE> " +"(note: double underscore) in the C directory." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2220 +msgid "In either case, use another function as an example of what to do." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2224 +msgid "After making these changes, use C to compile." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2226 +msgid "" +"Note that you don't need to implement the RPC, language bindings, manual " +"pages or anything else. It's all automatically generated from the OCaml " +"description." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:2230 +msgid "ADDING TESTS FOR AN API ACTION" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2232 +msgid "" +"You can supply zero or as many tests as you want per API call. The tests " +"can either be added as part of the API description " +"(C), or in some rarer cases you may want to " +"drop a script into C. Note that adding a script to " +"C is slower, so if possible use the first method." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2238 +msgid "" +"The following describes the test environment used when you add an API test " +"in C." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2241 +msgid "The test environment has 4 block devices:" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2245 +msgid "C 500MB" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2247 +msgid "General block device for testing." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2249 +msgid "C 50MB" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2251 +msgid "" +"C is an ext2 filesystem used for testing filesystem write " +"operations." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2254 +msgid "C 10MB" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2256 +msgid "Used in a few tests where two block devices are needed." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2258 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2260 +msgid "ISO with fixed content (see C)." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2264 +msgid "" +"To be able to run the tests in a reasonable amount of time, the libguestfs " +"appliance and block devices are reused between tests. So don't try testing " +"L :-x" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2268 +msgid "" +"Each test starts with an initial scenario, selected using one of the " +"C expressions, described in C. These " +"initialize the disks mentioned above in a particular way as documented in " +"C. You should not assume anything about the previous " +"contents of other disks that are not initialized." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2274 +msgid "" +"You can add a prerequisite clause to any individual test. This is a " +"run-time check, which, if it fails, causes the test to be skipped. Useful " +"if testing a command which might not work on all variations of libguestfs " +"builds. A test that has prerequisite of C means to run " +"unconditionally." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2280 +msgid "" +"In addition, packagers can skip individual tests by setting environment " +"variables before running C." +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2283 +#, no-wrap +msgid "" +" SKIP_TEST__=1\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2285 +msgid "eg: C skips test #3 of L." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2287 +msgid "or:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2289 +#, no-wrap +msgid "" +" SKIP_TEST_=1\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2291 +msgid "eg: C skips all L tests." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2293 +msgid "Packagers can run only certain tests by setting for example:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2295 +#, no-wrap +msgid "" +" TEST_ONLY=\"vfs_type zerofree\"\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2297 +msgid "" +"See C for more details of how these environment variables " +"work." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:2300 +msgid "DEBUGGING NEW API ACTIONS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2302 +msgid "Test new actions work before submitting them." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2304 +msgid "You can use guestfish to try out new commands." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2306 +msgid "" +"Debugging the daemon is a problem because it runs inside a minimal " +"environment. However you can fprintf messages in the daemon to stderr, and " +"they will show up if you use C." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:2310 +msgid "FORMATTING CODE AND OTHER CONVENTIONS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2312 +msgid "" +"Our C source code generally adheres to some basic code-formatting " +"conventions. The existing code base is not totally consistent on this " +"front, but we do prefer that contributed code be formatted similarly. In " +"short, use spaces-not-TABs for indentation, use 2 spaces for each " +"indentation level, and other than that, follow the K&R style." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2318 +msgid "" +"If you use Emacs, add the following to one of one of your start-up files " +"(e.g., ~/.emacs), to help ensure that you get indentation right:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2321 +#, no-wrap +msgid "" +" ;;; In libguestfs, indent with spaces everywhere (not TABs).\n" +" ;;; Exceptions: Makefile and ChangeLog modes.\n" +" (add-hook 'find-file-hook\n" +" '(lambda () (if (and buffer-file-name\n" +" (string-match \"/libguestfs\\\\>\"\n" +" (buffer-file-name))\n" +" (not (string-equal mode-name \"Change Log\"))\n" +" (not (string-equal mode-name \"Makefile\")))\n" +" (setq indent-tabs-mode nil))))\n" +" \n" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2331 +#, no-wrap +msgid "" +" ;;; When editing C sources in libguestfs, use this style.\n" +" (defun libguestfs-c-mode ()\n" +" \"C mode with adjusted defaults for use with libguestfs.\"\n" +" (interactive)\n" +" (c-set-style \"K&R\")\n" +" (setq c-indent-level 2)\n" +" (setq c-basic-offset 2))\n" +" (add-hook 'c-mode-hook\n" +" '(lambda () (if (string-match \"/libguestfs\\\\>\"\n" +" (buffer-file-name))\n" +" (libguestfs-c-mode))))\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2343 +msgid "Enable warnings when compiling (and fix any problems this finds):" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2346 +#, no-wrap +msgid "" +" ./configure --enable-gcc-warnings\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2348 +msgid "Useful targets are:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2350 +#, no-wrap +msgid "" +" make syntax-check # checks the syntax of the C code\n" +" make check # runs the test suite\n" +"\n" +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:2353 +msgid "DAEMON CUSTOM PRINTF FORMATTERS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2355 +msgid "" +"In the daemon code we have created custom printf formatters C<%Q> and C<%R>, " +"which are used to do shell quoting." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2360 +msgid "%Q" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2362 +msgid "" +"Simple shell quoted string. Any spaces or other shell characters are " +"escaped for you." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2365 +msgid "%R" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2367 +msgid "" +"Same as C<%Q> except the string is treated as a path which is prefixed by " +"the sysroot." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2372 ../fish/guestfish.pod:240 ../fish/guestfish.pod:599 +msgid "For example:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2374 +#, no-wrap +msgid "" +" asprintf (&cmd, \"cat %R\", path);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2376 +msgid "would produce C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2378 +msgid "" +"I Do I use these when you are passing parameters to the " +"C functions. These parameters do NOT need to be quoted " +"because they are not passed via the shell (instead, straight to exec). You " +"probably want to use the C function however." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:2384 +msgid "SUBMITTING YOUR NEW API ACTIONS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2386 +msgid "" +"Submit patches to the mailing list: " +"L and CC to " +"L." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:2390 +msgid "INTERNATIONALIZATION (I18N) SUPPORT" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2392 +msgid "We support i18n (gettext anyhow) in the library." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2394 +msgid "" +"However many messages come from the daemon, and we don't translate those at " +"the moment. One reason is that the appliance generally has all locale files " +"removed from it, because they take up a lot of space. So we'd have to readd " +"some of those, as well as copying our PO files into the appliance." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2400 +msgid "" +"Debugging messages are never translated, since they are intended for the " +"programmers." +msgstr "" + +#. type: =head2 +#: ../src/guestfs.pod:2403 +msgid "SOURCE CODE SUBDIRECTORIES" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2407 ../src/guestfs-actions.pod:5686 ../fish/guestfish-actions.pod:3808 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2409 +msgid "The libguestfs appliance, build scripts and so on." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2411 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2413 +msgid "Automated tests of the C API." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2415 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2417 +msgid "" +"The L, L and L commands and " +"documentation." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2420 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2422 +msgid "Outside contributions, experimental parts." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2424 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2426 +msgid "" +"The daemon that runs inside the libguestfs appliance and carries out " +"actions." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2429 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2431 +msgid "L command and documentation." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2433 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2435 +msgid "C API example code." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2437 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2439 +msgid "" +"L, the command-line shell, and various shell scripts built on " +"top such as L, L, L, " +"L." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2443 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2445 +msgid "L, FUSE (userspace filesystem) built on top of libguestfs." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2447 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2449 +msgid "" +"The crucially important generator, used to automatically generate large " +"amounts of boilerplate C code for things like RPC and bindings." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2452 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2454 +msgid "Files used by the test suite." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2456 +msgid "Some \"phony\" guest images which we test against." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2458 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2460 +msgid "L, the virtual machine image inspector." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2462 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2464 +msgid "Logo used on the website. The fish is called Arthur by the way." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2466 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2468 +msgid "M4 macros used by autoconf." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2470 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2472 +msgid "Translations of simple gettext strings." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2474 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2476 +msgid "" +"The build infrastructure and PO files for translations of manpages and POD " +"files. Eventually this will be combined with the C directory, but that " +"is rather complicated." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2480 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2482 +msgid "Regression tests." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2484 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2486 +msgid "L command and documentation." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2488 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2490 +msgid "Source code to the C library." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2492 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2494 +msgid "Command line tools written in Perl (L and many others)." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2496 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2498 +msgid "" +"Test tool for end users to test if their qemu/kernel combination will work " +"with libguestfs." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2501 +msgid "C" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2503 +msgid "C" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2505 +msgid "C" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2507 +msgid "C" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2509 +msgid "C" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2511 +msgid "C" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2513 +msgid "C" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2515 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2517 +msgid "Language bindings." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:2521 ../fish/guestfish.pod:996 ../test-tool/libguestfs-test-tool.pod:104 ../tools/virt-edit.pl:330 +msgid "ENVIRONMENT VARIABLES" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2525 ../fish/guestfish.pod:1022 +msgid "LIBGUESTFS_APPEND" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2527 ../fish/guestfish.pod:1024 +msgid "Pass additional options to the guest kernel." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2529 ../fish/guestfish.pod:1026 +msgid "LIBGUESTFS_DEBUG" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2531 +msgid "" +"Set C to enable verbose messages. This has the same " +"effect as calling C." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2534 ../fish/guestfish.pod:1031 +msgid "LIBGUESTFS_MEMSIZE" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2536 ../fish/guestfish.pod:1033 +msgid "Set the memory allocated to the qemu process, in megabytes. For example:" +msgstr "" + +#. type: verbatim +#: ../src/guestfs.pod:2539 ../fish/guestfish.pod:1036 +#, no-wrap +msgid "" +" LIBGUESTFS_MEMSIZE=700\n" +"\n" +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2541 ../fish/guestfish.pod:1038 +msgid "LIBGUESTFS_PATH" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2543 +msgid "" +"Set the path that libguestfs uses to search for kernel and initrd.img. See " +"the discussion of paths in section PATH above." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2546 ../fish/guestfish.pod:1043 +msgid "LIBGUESTFS_QEMU" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2548 ../fish/guestfish.pod:1045 +msgid "" +"Set the default qemu binary that libguestfs uses. If not set, then the qemu " +"which was found at compile time by the configure script is used." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2552 +msgid "See also L above." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2554 ../fish/guestfish.pod:1049 +msgid "LIBGUESTFS_TRACE" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2556 +msgid "" +"Set C to enable command traces. This has the same " +"effect as calling C." +msgstr "" + +#. type: =item +#: ../src/guestfs.pod:2559 ../fish/guestfish.pod:1058 +msgid "TMPDIR" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2561 ../fish/guestfish.pod:1060 +msgid "" +"Location of temporary directory, defaults to C except for the cached " +"supermin appliance which defaults to C." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2564 ../fish/guestfish.pod:1063 +msgid "" +"If libguestfs was compiled to use the supermin appliance then the real " +"appliance is cached in this directory, shared between all handles belonging " +"to the same EUID. You can use C<$TMPDIR> to configure another directory to " +"use in case C is not large enough." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:2572 ../fish/guestfish.pod:1121 ../test-tool/libguestfs-test-tool.pod:109 ../fuse/guestmount.pod:238 ../tools/virt-edit.pl:350 ../tools/virt-win-reg.pl:572 ../tools/virt-resize.pl:1483 ../tools/virt-list-filesystems.pl:189 ../tools/virt-tar.pl:286 ../tools/virt-make-fs.pl:534 ../tools/virt-list-partitions.pl:257 +msgid "SEE ALSO" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2574 +msgid "" +"L, L, L, " +"L, L, L, L, " +"L, L, L, L, " +"L, L, L, " +"L, L, L, " +"L, L, L, L, " +"L, L, L, L, " +"L." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2601 +msgid "" +"Tools with a similar purpose: L, L, L, " +"L, L." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:2608 ../tools/virt-win-reg.pl:587 ../tools/virt-make-fs.pl:548 +msgid "BUGS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2610 +msgid "To get a list of bugs against libguestfs use this link:" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2612 +msgid "L" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2614 +msgid "To report a new bug against libguestfs use this link:" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2616 +msgid "L" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2618 +msgid "When reporting a bug, please check:" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2624 +msgid "That the bug hasn't been reported already." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2628 +msgid "That you are testing a recent version." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2632 +msgid "Describe the bug accurately, and give a way to reproduce it." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2636 +msgid "" +"Run libguestfs-test-tool and paste the B output into the " +"bug report." +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:2641 ../fish/guestfish.pod:1144 ../test-tool/libguestfs-test-tool.pod:115 ../fuse/guestmount.pod:249 +msgid "AUTHORS" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2643 ../fish/guestfish.pod:1146 ../test-tool/libguestfs-test-tool.pod:117 ../fuse/guestmount.pod:251 +msgid "Richard W.M. Jones (C)" +msgstr "" + +#. type: =head1 +#: ../src/guestfs.pod:2645 ../fish/guestfish.pod:1148 ../test-tool/libguestfs-test-tool.pod:119 ../fuse/guestmount.pod:253 ../tools/virt-edit.pl:368 ../tools/virt-win-reg.pl:602 ../tools/virt-resize.pl:1508 ../tools/virt-list-filesystems.pl:206 ../tools/virt-tar.pl:305 ../tools/virt-make-fs.pl:563 ../tools/virt-list-partitions.pl:273 +msgid "COPYRIGHT" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2647 ../fish/guestfish.pod:1150 ../fuse/guestmount.pod:255 +msgid "Copyright (C) 2009-2010 Red Hat Inc. L" +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2650 +msgid "" +"This library is free software; you can redistribute it and/or modify it " +"under the terms of the GNU Lesser General Public License as published by the " +"Free Software Foundation; either version 2 of the License, or (at your " +"option) any later version." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2655 +msgid "" +"This library is distributed in the hope that it will be useful, but WITHOUT " +"ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or " +"FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License " +"for more details." +msgstr "" + +#. type: textblock +#: ../src/guestfs.pod:2660 +msgid "" +"You should have received a copy of the GNU Lesser General Public License " +"along with this library; if not, write to the Free Software Foundation, " +"Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA" +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:1 +msgid "guestfs_add_cdrom" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:3 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_cdrom (guestfs_h *g,\n" +" const char *filename);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:7 ../fish/guestfish-actions.pod:5 +msgid "This function adds a virtual CD-ROM disk image to the guest." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:9 ../fish/guestfish-actions.pod:7 +msgid "This is equivalent to the qemu parameter C<-cdrom filename>." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:17 +msgid "" +"This call checks for the existence of C. This stops you from " +"specifying other types of drive which are supported by qemu such as C " +"and C URLs. To specify those, use the general C call " +"instead." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:24 +msgid "" +"If you just want to add an ISO file (often you use this as an efficient way " +"to transfer large files into the guest), then you should probably use " +"C instead." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:30 ../src/guestfs-actions.pod:134 ../src/guestfs-actions.pod:195 ../src/guestfs-actions.pod:232 ../src/guestfs-actions.pod:246 ../src/guestfs-actions.pod:267 ../src/guestfs-actions.pod:287 ../src/guestfs-actions.pod:301 ../src/guestfs-actions.pod:416 ../src/guestfs-actions.pod:436 ../src/guestfs-actions.pod:450 ../src/guestfs-actions.pod:495 ../src/guestfs-actions.pod:523 ../src/guestfs-actions.pod:541 ../src/guestfs-actions.pod:608 ../src/guestfs-actions.pod:641 ../src/guestfs-actions.pod:655 ../src/guestfs-actions.pod:670 ../src/guestfs-actions.pod:769 ../src/guestfs-actions.pod:787 ../src/guestfs-actions.pod:801 ../src/guestfs-actions.pod:815 ../src/guestfs-actions.pod:976 ../src/guestfs-actions.pod:996 ../src/guestfs-actions.pod:1014 ../src/guestfs-actions.pod:1098 ../src/guestfs-actions.pod:1116 ../src/guestfs-actions.pod:1135 ../src/guestfs-actions.pod:1149 ../src/guestfs-actions.pod:1169 ../src/guestfs-actions.pod:1239 ../src/guestfs-actions.pod:1270 ../src/guestfs-actions.pod:1295 ../src/guestfs-actions.pod:1332 ../src/guestfs-actions.pod:1438 ../src/guestfs-actions.pod:1472 ../src/guestfs-actions.pod:1690 ../src/guestfs-actions.pod:1712 ../src/guestfs-actions.pod:1799 ../src/guestfs-actions.pod:2261 ../src/guestfs-actions.pod:2405 ../src/guestfs-actions.pod:2466 ../src/guestfs-actions.pod:2501 ../src/guestfs-actions.pod:3336 ../src/guestfs-actions.pod:3351 ../src/guestfs-actions.pod:3371 ../src/guestfs-actions.pod:3526 ../src/guestfs-actions.pod:3540 ../src/guestfs-actions.pod:3553 ../src/guestfs-actions.pod:3567 ../src/guestfs-actions.pod:3582 ../src/guestfs-actions.pod:3618 ../src/guestfs-actions.pod:3690 ../src/guestfs-actions.pod:3710 ../src/guestfs-actions.pod:3727 ../src/guestfs-actions.pod:3750 ../src/guestfs-actions.pod:3773 ../src/guestfs-actions.pod:3805 ../src/guestfs-actions.pod:3824 ../src/guestfs-actions.pod:3843 ../src/guestfs-actions.pod:3878 ../src/guestfs-actions.pod:3890 ../src/guestfs-actions.pod:3926 ../src/guestfs-actions.pod:3942 ../src/guestfs-actions.pod:3955 ../src/guestfs-actions.pod:3970 ../src/guestfs-actions.pod:3987 ../src/guestfs-actions.pod:4080 ../src/guestfs-actions.pod:4100 ../src/guestfs-actions.pod:4113 ../src/guestfs-actions.pod:4164 ../src/guestfs-actions.pod:4182 ../src/guestfs-actions.pod:4200 ../src/guestfs-actions.pod:4216 ../src/guestfs-actions.pod:4230 ../src/guestfs-actions.pod:4244 ../src/guestfs-actions.pod:4261 ../src/guestfs-actions.pod:4276 ../src/guestfs-actions.pod:4296 ../src/guestfs-actions.pod:4354 ../src/guestfs-actions.pod:4427 ../src/guestfs-actions.pod:4458 ../src/guestfs-actions.pod:4477 ../src/guestfs-actions.pod:4496 ../src/guestfs-actions.pod:4508 ../src/guestfs-actions.pod:4525 ../src/guestfs-actions.pod:4538 ../src/guestfs-actions.pod:4553 ../src/guestfs-actions.pod:4568 ../src/guestfs-actions.pod:4603 ../src/guestfs-actions.pod:4618 ../src/guestfs-actions.pod:4638 ../src/guestfs-actions.pod:4652 ../src/guestfs-actions.pod:4669 ../src/guestfs-actions.pod:4718 ../src/guestfs-actions.pod:4755 ../src/guestfs-actions.pod:4769 ../src/guestfs-actions.pod:4797 ../src/guestfs-actions.pod:4814 ../src/guestfs-actions.pod:4832 ../src/guestfs-actions.pod:4966 ../src/guestfs-actions.pod:5023 ../src/guestfs-actions.pod:5045 ../src/guestfs-actions.pod:5063 ../src/guestfs-actions.pod:5095 ../src/guestfs-actions.pod:5161 ../src/guestfs-actions.pod:5178 ../src/guestfs-actions.pod:5191 ../src/guestfs-actions.pod:5205 ../src/guestfs-actions.pod:5494 ../src/guestfs-actions.pod:5513 ../src/guestfs-actions.pod:5532 ../src/guestfs-actions.pod:5544 ../src/guestfs-actions.pod:5556 ../src/guestfs-actions.pod:5570 ../src/guestfs-actions.pod:5582 ../src/guestfs-actions.pod:5596 ../src/guestfs-actions.pod:5612 ../src/guestfs-actions.pod:5633 ../src/guestfs-actions.pod:5652 ../src/guestfs-actions.pod:5671 ../src/guestfs-actions.pod:5701 ../src/guestfs-actions.pod:5717 ../src/guestfs-actions.pod:5740 ../src/guestfs-actions.pod:5758 ../src/guestfs-actions.pod:5777 ../src/guestfs-actions.pod:5798 ../src/guestfs-actions.pod:5817 ../src/guestfs-actions.pod:5834 ../src/guestfs-actions.pod:5862 ../src/guestfs-actions.pod:5886 ../src/guestfs-actions.pod:5905 ../src/guestfs-actions.pod:5929 ../src/guestfs-actions.pod:5944 ../src/guestfs-actions.pod:5959 ../src/guestfs-actions.pod:5978 ../src/guestfs-actions.pod:6015 ../src/guestfs-actions.pod:6038 ../src/guestfs-actions.pod:6064 ../src/guestfs-actions.pod:6172 ../src/guestfs-actions.pod:6293 ../src/guestfs-actions.pod:6305 ../src/guestfs-actions.pod:6318 ../src/guestfs-actions.pod:6331 ../src/guestfs-actions.pod:6353 ../src/guestfs-actions.pod:6366 ../src/guestfs-actions.pod:6379 ../src/guestfs-actions.pod:6392 ../src/guestfs-actions.pod:6407 ../src/guestfs-actions.pod:6466 ../src/guestfs-actions.pod:6483 ../src/guestfs-actions.pod:6499 ../src/guestfs-actions.pod:6515 ../src/guestfs-actions.pod:6532 ../src/guestfs-actions.pod:6545 ../src/guestfs-actions.pod:6565 ../src/guestfs-actions.pod:6601 ../src/guestfs-actions.pod:6615 ../src/guestfs-actions.pod:6656 ../src/guestfs-actions.pod:6669 ../src/guestfs-actions.pod:6687 ../src/guestfs-actions.pod:6721 ../src/guestfs-actions.pod:6757 ../src/guestfs-actions.pod:6876 ../src/guestfs-actions.pod:6894 ../src/guestfs-actions.pod:6908 ../src/guestfs-actions.pod:6963 ../src/guestfs-actions.pod:6976 ../src/guestfs-actions.pod:7021 ../src/guestfs-actions.pod:7054 ../src/guestfs-actions.pod:7108 ../src/guestfs-actions.pod:7134 ../src/guestfs-actions.pod:7200 ../src/guestfs-actions.pod:7219 ../src/guestfs-actions.pod:7248 +msgid "This function returns 0 on success or -1 on error." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:32 ../src/guestfs-actions.pod:248 ../src/guestfs-actions.pod:269 ../fish/guestfish-actions.pod:28 ../fish/guestfish-actions.pod:158 ../fish/guestfish-actions.pod:172 +msgid "" +"This function is deprecated. In new code, use the C call " +"instead." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:35 ../src/guestfs-actions.pod:251 ../src/guestfs-actions.pod:272 ../src/guestfs-actions.pod:1443 ../src/guestfs-actions.pod:1939 ../src/guestfs-actions.pod:1960 ../src/guestfs-actions.pod:4301 ../src/guestfs-actions.pod:7142 ../src/guestfs-actions.pod:7311 ../fish/guestfish-actions.pod:31 ../fish/guestfish-actions.pod:161 ../fish/guestfish-actions.pod:175 ../fish/guestfish-actions.pod:956 ../fish/guestfish-actions.pod:1319 ../fish/guestfish-actions.pod:1333 ../fish/guestfish-actions.pod:2908 ../fish/guestfish-actions.pod:4762 ../fish/guestfish-actions.pod:4859 +msgid "" +"Deprecated functions will not be removed from the API, but the fact that " +"they are deprecated indicates that there are problems with correct use of " +"these functions." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:39 ../src/guestfs-actions.pod:136 ../src/guestfs-actions.pod:1100 ../src/guestfs-actions.pod:1911 ../src/guestfs-actions.pod:2009 ../src/guestfs-actions.pod:2112 ../src/guestfs-actions.pod:3338 ../src/guestfs-actions.pod:3353 ../src/guestfs-actions.pod:4605 ../src/guestfs-actions.pod:5719 ../src/guestfs-actions.pod:5836 ../src/guestfs-actions.pod:5946 ../src/guestfs-actions.pod:6409 ../src/guestfs-actions.pod:6534 ../src/guestfs-actions.pod:7056 +msgid "(Added in 0.3)" +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:41 +msgid "guestfs_add_domain" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:43 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_domain (guestfs_h *g,\n" +" const char *dom,\n" +" ...);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:48 ../src/guestfs-actions.pod:145 ../src/guestfs-actions.pod:4315 +msgid "" +"You may supply a list of optional arguments to this call. Use zero or more " +"of the following pairs of parameters, and terminate the list with C<-1> on " +"its own. See L." +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:53 +#, no-wrap +msgid "" +" GUESTFS_ADD_DOMAIN_LIBVIRTURI, const char *libvirturi,\n" +" GUESTFS_ADD_DOMAIN_READONLY, int readonly,\n" +" GUESTFS_ADD_DOMAIN_IFACE, const char *iface,\n" +" GUESTFS_ADD_DOMAIN_LIVE, int live,\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:58 +msgid "" +"This function adds the disk(s) attached to the named libvirt domain C. " +"It works by connecting to libvirt, requesting the domain and domain XML from " +"libvirt, parsing it for disks, and calling C on each " +"one." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:63 ../fish/guestfish-actions.pod:46 +msgid "" +"The number of disks added is returned. This operation is atomic: if an " +"error is returned, then no disks are added." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:66 ../fish/guestfish-actions.pod:49 +msgid "" +"This function does some minimal checks to make sure the libvirt domain is " +"not running (unless C is true). In a future version we will try " +"to acquire the libvirt lock on each disk." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:70 ../fish/guestfish-actions.pod:53 +msgid "" +"Disks must be accessible locally. This often means that adding disks from a " +"remote libvirt connection (see L) will fail " +"unless those disks are accessible via the same device path locally too." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:75 ../fish/guestfish-actions.pod:58 +msgid "" +"The optional C parameter sets the libvirt URI (see " +"L). If this is not set then we connect to the " +"default libvirt URI (or one set through an environment variable, see the " +"libvirt documentation for full details)." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:81 ../fish/guestfish-actions.pod:64 +msgid "" +"The optional C flag controls whether this call will try to connect to " +"a running virtual machine C process if it sees a suitable " +"EchannelE element in the libvirt XML definition. The default (if " +"the flag is omitted) is never to try. See L for more information." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:88 +msgid "" +"The other optional parameters are passed directly through to " +"C." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:91 ../src/guestfs-actions.pod:344 ../src/guestfs-actions.pod:509 ../src/guestfs-actions.pod:687 ../src/guestfs-actions.pod:718 ../src/guestfs-actions.pod:736 ../src/guestfs-actions.pod:755 ../src/guestfs-actions.pod:1315 ../src/guestfs-actions.pod:1669 ../src/guestfs-actions.pod:1872 ../src/guestfs-actions.pod:1981 ../src/guestfs-actions.pod:2021 ../src/guestfs-actions.pod:2076 ../src/guestfs-actions.pod:2099 ../src/guestfs-actions.pod:2392 ../src/guestfs-actions.pod:2719 ../src/guestfs-actions.pod:2740 ../src/guestfs-actions.pod:4741 ../src/guestfs-actions.pod:4869 ../src/guestfs-actions.pod:5275 ../src/guestfs-actions.pod:5301 ../src/guestfs-actions.pod:6642 ../src/guestfs-actions.pod:7067 ../src/guestfs-actions.pod:7080 ../src/guestfs-actions.pod:7093 +msgid "On error this function returns -1." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:93 +msgid "(Added in 1.7.4)" +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:95 +msgid "guestfs_add_domain_va" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:97 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_domain_va (guestfs_h *g,\n" +" const char *dom,\n" +" va_list args);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:102 +msgid "This is the \"va_list variant\" of L." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:104 ../src/guestfs-actions.pod:115 ../src/guestfs-actions.pod:208 ../src/guestfs-actions.pod:219 ../src/guestfs-actions.pod:4368 ../src/guestfs-actions.pod:4380 +msgid "See L." +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:106 +msgid "guestfs_add_domain_argv" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:108 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_domain_argv (guestfs_h *g,\n" +" const char *dom,\n" +" const struct guestfs_add_domain_argv *optargs);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:113 +msgid "This is the \"argv variant\" of L." +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:117 +msgid "guestfs_add_drive" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:119 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_drive (guestfs_h *g,\n" +" const char *filename);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:123 +msgid "" +"This function is the equivalent of calling C with no " +"optional parameters, so the disk is added writable, with the format being " +"detected automatically." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:127 +msgid "" +"Automatic detection of the format opens you up to a potential security hole " +"when dealing with untrusted raw-format images. See CVE-2010-3851 and " +"RHBZ#642934. Specifying the format closes this security hole. Therefore " +"you should think about replacing calls to this function with calls to " +"C, and specifying the format." +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:138 +msgid "guestfs_add_drive_opts" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:140 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_drive_opts (guestfs_h *g,\n" +" const char *filename,\n" +" ...);\n" +"\n" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:150 +#, no-wrap +msgid "" +" GUESTFS_ADD_DRIVE_OPTS_READONLY, int readonly,\n" +" GUESTFS_ADD_DRIVE_OPTS_FORMAT, const char *format,\n" +" GUESTFS_ADD_DRIVE_OPTS_IFACE, const char *iface,\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:154 ../fish/guestfish-actions.pod:97 +msgid "" +"This function adds a virtual machine disk image C to libguestfs. " +"The first time you call this function, the disk appears as C, the " +"second time as C, and so on." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:159 ../fish/guestfish-actions.pod:102 +msgid "" +"You don't necessarily need to be root when using libguestfs. However you " +"obviously do need sufficient permissions to access the filename for whatever " +"operations you want to perform (ie. read access if you just want to read the " +"image or write access if you want to modify the image)." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:165 ../fish/guestfish-actions.pod:108 +msgid "This call checks that C exists." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:167 ../src/guestfs-actions.pod:4326 ../fish/guestfish-actions.pod:110 ../fish/guestfish-actions.pod:2919 +msgid "The optional arguments are:" +msgstr "" + +#. type: =item +#: ../src/guestfs-actions.pod:171 ../fish/guestfish-actions.pod:114 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:173 ../fish/guestfish-actions.pod:116 +msgid "" +"If true then the image is treated as read-only. Writes are still allowed, " +"but they are stored in a temporary snapshot overlay which is discarded at " +"the end. The disk that you add is not modified." +msgstr "" + +#. type: =item +#: ../src/guestfs-actions.pod:177 ../fish/guestfish-actions.pod:120 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:179 +msgid "" +"This forces the image format. If you omit this (or use C " +"or C) then the format is automatically detected. " +"Possible formats include C and C." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:183 ../fish/guestfish-actions.pod:126 +msgid "" +"Automatic detection of the format opens you up to a potential security hole " +"when dealing with untrusted raw-format images. See CVE-2010-3851 and " +"RHBZ#642934. Specifying the format closes this security hole." +msgstr "" + +#. type: =item +#: ../src/guestfs-actions.pod:188 ../fish/guestfish-actions.pod:131 +msgid "C" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:190 +msgid "" +"This rarely-used option lets you emulate the behaviour of the deprecated " +"C call (q.v.)" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:197 +msgid "(Added in 1.5.23)" +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:199 +msgid "guestfs_add_drive_opts_va" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:201 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_drive_opts_va (guestfs_h *g,\n" +" const char *filename,\n" +" va_list args);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:206 +msgid "This is the \"va_list variant\" of L." +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:210 +msgid "guestfs_add_drive_opts_argv" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:212 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_drive_opts_argv (guestfs_h *g,\n" +" const char *filename,\n" +" const struct guestfs_add_drive_opts_argv " +"*optargs);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:217 +msgid "This is the \"argv variant\" of L." +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:221 +msgid "guestfs_add_drive_ro" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:223 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_drive_ro (guestfs_h *g,\n" +" const char *filename);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:227 +msgid "" +"This function is the equivalent of calling C with " +"the optional parameter C set to 1, so the " +"disk is added read-only, with the format being detected automatically." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:234 +msgid "(Added in 1.0.38)" +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:236 +msgid "guestfs_add_drive_ro_with_if" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:238 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_drive_ro_with_if (guestfs_h *g,\n" +" const char *filename,\n" +" const char *iface);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:243 +msgid "" +"This is the same as C but it allows you to specify the " +"QEMU interface emulation to use at run time." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:255 ../src/guestfs-actions.pod:276 ../src/guestfs-actions.pod:2351 +msgid "(Added in 1.0.84)" +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:257 +msgid "guestfs_add_drive_with_if" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:259 +#, no-wrap +msgid "" +" int\n" +" guestfs_add_drive_with_if (guestfs_h *g,\n" +" const char *filename,\n" +" const char *iface);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:264 +msgid "" +"This is the same as C but it allows you to specify the " +"QEMU interface emulation to use at run time." +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:278 +msgid "guestfs_aug_clear" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:280 +#, no-wrap +msgid "" +" int\n" +" guestfs_aug_clear (guestfs_h *g,\n" +" const char *augpath);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:284 ../fish/guestfish-actions.pod:183 +msgid "" +"Set the value associated with C to C. This is the same as the " +"L C command." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:289 ../src/guestfs-actions.pod:2101 +msgid "(Added in 1.3.4)" +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:291 +msgid "guestfs_aug_close" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:293 +#, no-wrap +msgid "" +" int\n" +" guestfs_aug_close (guestfs_h *g);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:296 +msgid "" +"Close the current Augeas handle and free up any resources used by it. After " +"calling this, you have to call C again before you can use " +"any other Augeas functions." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:303 ../src/guestfs-actions.pod:328 ../src/guestfs-actions.pod:346 ../src/guestfs-actions.pod:360 ../src/guestfs-actions.pod:418 ../src/guestfs-actions.pod:438 ../src/guestfs-actions.pod:452 ../src/guestfs-actions.pod:483 ../src/guestfs-actions.pod:497 ../src/guestfs-actions.pod:511 ../src/guestfs-actions.pod:525 ../src/guestfs-actions.pod:543 ../src/guestfs-actions.pod:5352 +msgid "(Added in 0.7)" +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:305 +msgid "guestfs_aug_defnode" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1573 +#. type: verbatim +#: ../src/guestfs-actions.pod:307 +#, no-wrap msgid "" -"Save this script as C (or wherever), C, and " -"then use it by setting the LIBGUESTFS_QEMU environment variable. For " -"example:" +" struct guestfs_int_bool *\n" +" guestfs_aug_defnode (guestfs_h *g,\n" +" const char *name,\n" +" const char *expr,\n" +" const char *val);\n" +"\n" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:313 ../fish/guestfish-actions.pod:199 +msgid "Defines a variable C whose value is the result of evaluating C." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:316 +msgid "" +"If C evaluates to an empty nodeset, a node is created, equivalent to " +"calling C C, C. C will be the nodeset " +"containing that single node." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:320 ../fish/guestfish-actions.pod:206 +msgid "" +"On success this returns a pair containing the number of nodes in the " +"nodeset, and a boolean flag if a node was created." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:324 +msgid "" +"This function returns a C, or NULL if there was " +"an error. I after use>." msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1577 +#. type: =head2 +#: ../src/guestfs-actions.pod:330 +msgid "guestfs_aug_defvar" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:332 #, no-wrap msgid "" -" LIBGUESTFS_QEMU=/tmp/qemu.wrapper guestfish\n" +" int\n" +" guestfs_aug_defvar (guestfs_h *g,\n" +" const char *name,\n" +" const char *expr);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1579 +#. type: textblock +#: ../src/guestfs-actions.pod:337 ../fish/guestfish-actions.pod:214 msgid "" -"Note that libguestfs also calls qemu with the -help and -version options in " -"order to determine features." +"Defines an Augeas variable C whose value is the result of evaluating " +"C. If C is NULL, then C is undefined." msgstr "" -# type: =head1 -#: ../src/guestfs.pod:1582 -msgid "LIBGUESTFS VERSION NUMBERS" +#. type: textblock +#: ../src/guestfs-actions.pod:341 ../fish/guestfish-actions.pod:218 +msgid "" +"On success this returns the number of nodes in C, or C<0> if C " +"evaluates to something which is not a nodeset." +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:348 +msgid "guestfs_aug_get" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1584 +#. type: verbatim +#: ../src/guestfs-actions.pod:350 +#, no-wrap msgid "" -"Since April 2010, libguestfs has started to make separate development and " -"stable releases, along with corresponding branches in our git repository. " -"These separate releases can be identified by version number:" +" char *\n" +" guestfs_aug_get (guestfs_h *g,\n" +" const char *augpath);\n" +"\n" msgstr "" -# type: verbatim -#: ../src/guestfs.pod:1589 +#. type: textblock +#: ../src/guestfs-actions.pod:354 ../fish/guestfish-actions.pod:225 +msgid "" +"Look up the value associated with C. If C matches exactly one " +"node, the C is returned." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:357 ../src/guestfs-actions.pod:857 ../src/guestfs-actions.pod:875 ../src/guestfs-actions.pod:935 ../src/guestfs-actions.pod:951 ../src/guestfs-actions.pod:1054 ../src/guestfs-actions.pod:1184 ../src/guestfs-actions.pod:1201 ../src/guestfs-actions.pod:1220 ../src/guestfs-actions.pod:1349 ../src/guestfs-actions.pod:1540 ../src/guestfs-actions.pod:1652 ../src/guestfs-actions.pod:1815 ../src/guestfs-actions.pod:1832 ../src/guestfs-actions.pod:1899 ../src/guestfs-actions.pod:1933 ../src/guestfs-actions.pod:1954 ../src/guestfs-actions.pod:2124 ../src/guestfs-actions.pod:2316 ../src/guestfs-actions.pod:2523 ../src/guestfs-actions.pod:2604 ../src/guestfs-actions.pod:2671 ../src/guestfs-actions.pod:2691 ../src/guestfs-actions.pod:2805 ../src/guestfs-actions.pod:2836 ../src/guestfs-actions.pod:2860 ../src/guestfs-actions.pod:2922 ../src/guestfs-actions.pod:2945 ../src/guestfs-actions.pod:3512 ../src/guestfs-actions.pod:3862 ../src/guestfs-actions.pod:4032 ../src/guestfs-actions.pod:4142 ../src/guestfs-actions.pod:4887 ../src/guestfs-actions.pod:5080 ../src/guestfs-actions.pod:5250 ../src/guestfs-actions.pod:5428 ../src/guestfs-actions.pod:5477 ../src/guestfs-actions.pod:6085 ../src/guestfs-actions.pod:6101 ../src/guestfs-actions.pod:6118 ../src/guestfs-actions.pod:6142 ../src/guestfs-actions.pod:6816 ../src/guestfs-actions.pod:6835 ../src/guestfs-actions.pod:6853 ../src/guestfs-actions.pod:7033 ../src/guestfs-actions.pod:7305 +msgid "" +"This function returns a string, or NULL on error. I." +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:362 +msgid "guestfs_aug_init" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:364 #, no-wrap msgid "" -" even numbers for stable: 1.2.x, 1.4.x, ...\n" -" .-------- odd numbers for development: 1.3.x, 1.5.x, ...\n" -" |\n" -" v\n" -" 1 . 3 . 5\n" -" ^ ^\n" -" | |\n" -" | `-------- sub-version\n" -" |\n" -" `------ always '1' because we don't change the ABI\n" +" int\n" +" guestfs_aug_init (guestfs_h *g,\n" +" const char *root,\n" +" int flags);\n" "\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1600 -msgid "Thus \"1.3.5\" is the 5th update to the development branch \"1.3\"." +#. type: textblock +#: ../src/guestfs-actions.pod:369 ../fish/guestfish-actions.pod:232 +msgid "" +"Create a new Augeas handle for editing configuration files. If there was " +"any previous Augeas handle associated with this guestfs session, then it is " +"closed." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:373 +msgid "You must call this before using any other C commands." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:376 ../fish/guestfish-actions.pod:239 +msgid "C is the filesystem root. C must not be NULL, use C instead." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1602 +#. type: textblock +#: ../src/guestfs-actions.pod:379 ../fish/guestfish-actions.pod:242 msgid "" -"As time passes we cherry pick fixes from the development branch and backport " -"those into the stable branch, the effect being that the stable branch should " -"get more stable and less buggy over time. So the stable releases are ideal " -"for people who don't need new features but would just like the software to " -"work." +"The flags are the same as the flags defined in Eaugeas.hE, the " +"logical I of the following integers:" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1608 -msgid "Our criteria for backporting changes are:" +#. type: =item +#: ../src/guestfs-actions.pod:385 ../fish/guestfish-actions.pod:248 +msgid "C = 1" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:387 ../fish/guestfish-actions.pod:250 +msgid "Keep the original file with a C<.augsave> extension." +msgstr "" + +#. type: =item +#: ../src/guestfs-actions.pod:389 ../fish/guestfish-actions.pod:252 +msgid "C = 2" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1614 +#. type: textblock +#: ../src/guestfs-actions.pod:391 ../fish/guestfish-actions.pod:254 msgid "" -"Documentation changes which don't affect any code are backported unless the " -"documentation refers to a future feature which is not in stable." +"Save changes into a file with extension C<.augnew>, and do not overwrite " +"original. Overrides C." +msgstr "" + +#. type: =item +#: ../src/guestfs-actions.pod:394 ../fish/guestfish-actions.pod:257 +msgid "C = 4" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:396 ../fish/guestfish-actions.pod:259 +msgid "Typecheck lenses (can be expensive)." +msgstr "" + +#. type: =item +#: ../src/guestfs-actions.pod:398 ../fish/guestfish-actions.pod:261 +msgid "C = 8" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:400 ../fish/guestfish-actions.pod:263 +msgid "Do not use standard load path for modules." +msgstr "" + +#. type: =item +#: ../src/guestfs-actions.pod:402 ../fish/guestfish-actions.pod:265 +msgid "C = 16" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:404 ../fish/guestfish-actions.pod:267 +msgid "Make save a no-op, just record what would have been changed." +msgstr "" + +#. type: =item +#: ../src/guestfs-actions.pod:406 ../fish/guestfish-actions.pod:269 +msgid "C = 32" +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:408 +msgid "Do not load the tree in C." msgstr "" -# type: textblock -#: ../src/guestfs.pod:1620 +#. type: textblock +#: ../src/guestfs-actions.pod:412 +msgid "To close the handle, you can call C." +msgstr "" + +#. type: textblock +#: ../src/guestfs-actions.pod:414 ../fish/guestfish-actions.pod:277 +msgid "To find out more about Augeas, see L." +msgstr "" + +#. type: =head2 +#: ../src/guestfs-actions.pod:420 +msgid "guestfs_aug_insert" +msgstr "" + +#. type: verbatim +#: ../src/guestfs-actions.pod:422 +#, no-wrap msgid "" -"Bug fixes which are not controversial, fix obvious problems, and have been " -"well tested are backported." +" int\n" +" guestfs_aug_insert (guestfs_h *g,\n" +" const char *augpath,\n" +" const char *label,\n" +" int before);\n" +"\n" msgstr "" -# type: textblock -#: ../src/guestfs.pod:1625 +#. type: textblock +#: ../src/guestfs-actions.pod:428 ../fish/guestfish-actions.pod:283 msgid "" -"Simple rearrangements of code which shouldn't affect how it works get " -"backported. This is so that the code in the two branches doesn't get too " -"far out of step, allowing us to backport future fixes more easily." +"Create a new sibling C