+"Does the named device exist? If so, we use that device. However if I<not> "
+"then we continue with this algorithm."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1079
+msgid "Replace initial C</dev/sd> string with C</dev/hd>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1081
+msgid "For example, change C</dev/sda2> to C</dev/hda2>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1083
+msgid "If that named device exists, use it. If not, continue."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1087
+msgid "Replace initial C</dev/sd> string with C</dev/vd>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1089
+msgid "If that named device exists, use it. If not, return an error."
+msgstr ""
+
+# type: =head3
+#. type: =head3
+#: ../src/guestfs.pod:1093
+msgid "PORTABILITY CONCERNS WITH BLOCK DEVICE NAMING"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1095
+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: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1099
+msgid ""
+"Where possible for maximum future portability programs using libguestfs "
+"should use these future-proof techniques:"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1106
+msgid ""
+"Use L</guestfs_list_devices> or L</guestfs_list_partitions> to list actual "
+"device names, and then use those names directly."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1109
+msgid ""
+"Since those device names exist by definition, they will never be translated."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1114
+msgid ""
+"Use higher level ways to identify filesystems, such as LVM names, UUIDs and "
+"filesystem labels."
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:1119
+msgid "SECURITY"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1121
+msgid ""
+"This section discusses security implications of using libguestfs, "
+"particularly with untrusted or malicious guests or disk images."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1124
+msgid "GENERAL SECURITY CONSIDERATIONS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1126
+msgid ""
+"Be careful with any files or data that you download from a guest (by "
+"\"download\" we mean not just the L</guestfs_download> 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: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1136
+msgid "the data (file etc) not being present"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1140
+msgid "being present but empty"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1144
+msgid "being much larger than normal"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1148
+msgid "containing arbitrary 8 bit data"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1152
+msgid "being in an unexpected character encoding"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1156
+msgid "containing homoglyphs."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1160
+msgid "SECURITY OF MOUNTING FILESYSTEMS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1162
+msgid ""
+"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: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1175
+msgid ""
+"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: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1186
+msgid ""
+"In any case callers can reduce the attack surface by forcing the filesystem "
+"type when mounting (use L</guestfs_mount_vfs>)."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1189
+msgid "PROTOCOL SECURITY"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1191
+msgid ""
+"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: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1197
+msgid "INSPECTION SECURITY"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1199
+msgid ""
+"Parts of the inspection API (see L</INSPECTION>) 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
+#. type: textblock
+#: ../src/guestfs.pod:1205
+msgid ""
+"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</etc/sysconfig/network> that we find in the "
+"guest, but the guest administrator can easily manipulate these files to "
+"provide the wrong hostname."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1213
+msgid ""
+"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: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1219
+msgid "RUNNING UNTRUSTED GUEST COMMANDS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1221
+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</RUNNING COMMANDS>."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1227
+msgid "CVE-2010-3851"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1229
+msgid "https://bugzilla.redhat.com/642934"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1231
+msgid ""
+"This security bug concerns the automatic disk format detection that qemu "
+"does on disk images."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1234
+msgid ""
+"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
+#. type: textblock
+#: ../src/guestfs.pod:1239
+msgid ""
+"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
+#. type: textblock
+#: ../src/guestfs.pod:1244
+msgid ""
+"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: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1252
+msgid ""
+"In libguestfs this is rather hard to exploit except under two circumstances:"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1259
+msgid "You have enabled the network or have opened the disk in write mode."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1263
+msgid ""
+"You are also running untrusted code from the guest (see L</RUNNING "
+"COMMANDS>)."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1268
+msgid ""
+"The way to avoid this is to specify the expected disk format when adding "
+"disks (the optional C<format> option to L</guestfs_add_drive_opts>). You "
+"should always do this if the disk is raw format, and it's a good idea for "
+"other cases too."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1273
+msgid ""
+"For disks added from libvirt using calls like L</guestfs_add_domain>, the "
+"format is fetched from libvirt and passed through."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1276
+msgid ""
+"For libguestfs tools, use the I<--format> command line parameter as "
+"appropriate."
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:1279
+msgid "CONNECTION MANAGEMENT"
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1281
+msgid "guestfs_h *"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1283
+msgid ""
+"C<guestfs_h> is the opaque type representing a connection handle. Create a "
+"handle by calling L</guestfs_create>. Call L</guestfs_close> to free the "
+"handle and release all resources used."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1287
+msgid ""
+"For information on using multiple handles and threads, see the section L</"
+"MULTIPLE HANDLES AND MULTIPLE THREADS> above."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1290
+msgid "guestfs_create"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1292
+#, no-wrap
+msgid ""
+" guestfs_h *guestfs_create (void);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1294
+msgid "Create a connection handle."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1296
+msgid ""
+"On success this returns a non-NULL pointer to a handle. On error it returns "
+"NULL."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1299
+msgid ""
+"You have to \"configure\" the handle after creating it. This includes "
+"calling L</guestfs_add_drive_opts> (or one of the equivalent calls) on the "
+"handle at least once."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1303
+msgid "After configuring the handle, you have to call L</guestfs_launch>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1305
+msgid ""
+"You may also want to configure error handling for the handle. See the L</"
+"ERROR HANDLING> section below."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1308
+msgid "guestfs_close"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1310
+#, no-wrap
+msgid ""
+" void guestfs_close (guestfs_h *g);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1312
+msgid "This closes the connection handle and frees up all resources used."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1314
+msgid ""
+"If autosync was set on the handle and the handle was launched, then this "
+"implicitly calls various functions to unmount filesystems and sync the "
+"disk. See L</guestfs_set_autosync> for more details."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1318
+msgid "If a close callback was set on the handle, then it is called."
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:1320
+msgid "ERROR HANDLING"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1322
+msgid ""
+"API functions can return errors. For example, almost all functions that "
+"return C<int> will return C<-1> to indicate an error."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1325
+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
+#. type: textblock
+#: ../src/guestfs.pod:1329
+msgid ""
+"You can get at the additional information about the last error on the handle "
+"by calling L</guestfs_last_error>, L</guestfs_last_errno>, and/or by setting "
+"up an error handler with L</guestfs_set_error_handler>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1334
+msgid ""
+"When the handle is created, a default error handler is installed which "
+"prints the error message string to C<stderr>. For small short-running "
+"command line programs it is sufficient to do:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1338
+#, no-wrap
+msgid ""
+" if (guestfs_launch (g) == -1)\n"
+" exit (EXIT_FAILURE);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1341
+msgid ""
+"since the default error handler will ensure that an error message has been "
+"printed to C<stderr> before the program exits."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1344
+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
+#. type: verbatim
+#: ../src/guestfs.pod:1347
+#, no-wrap
+msgid ""
+" g = guestfs_create ();\n"
+" \n"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1349
+#, no-wrap
+msgid ""
+" /* This disables the default behaviour of printing errors\n"
+" on stderr. */\n"
+" guestfs_set_error_handler (g, NULL, NULL);\n"
+" \n"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1353
+#, no-wrap
+msgid ""
+" 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
+#. type: textblock
+#: ../src/guestfs.pod:1361
+msgid ""
+"Out of memory errors are handled differently. The default action is to call "
+"L<abort(3)>. If this is undesirable, then you can set a handler using L</"
+"guestfs_set_out_of_memory_handler>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1365
+msgid ""
+"L</guestfs_create> returns C<NULL> 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</guestfs_create> is supposed to be a "
+"lightweight operation which can only fail because of insufficient memory (it "
+"returns NULL in this case)."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1371
+msgid "guestfs_last_error"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1373
+#, no-wrap
+msgid ""
+" const char *guestfs_last_error (guestfs_h *g);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1375
+msgid ""
+"This returns the last error message that happened on C<g>. If there has not "
+"been an error since the handle was created, then this returns C<NULL>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1379
+msgid ""
+"The lifetime of the returned string is until the next error occurs, or L</"
+"guestfs_close> is called."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1382
+msgid "guestfs_last_errno"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1384
+#, no-wrap
+msgid ""
+" int guestfs_last_errno (guestfs_h *g);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1386
+msgid "This returns the last error number (errno) that happened on C<g>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1388
+msgid "If successful, an errno integer not equal to zero is returned."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1390
+msgid ""
+"If no error, this returns 0. This call can return 0 in three situations:"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1397
+msgid "There has not been any error on the handle."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1401
+msgid ""
+"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: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1407
+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
+#. type: textblock
+#: ../src/guestfs.pod:1413
+msgid ""
+"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<EINVAL>. In practice this should "
+"only happen in very rare circumstances."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1421
+msgid "guestfs_set_error_handler"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1423
+#, no-wrap
+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"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1430
+msgid ""
+"The callback C<cb> 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
+#. type: textblock
+#: ../src/guestfs.pod:1434
+msgid ""
+"C<errno> is not passed to the callback. To get that the callback must call "
+"L</guestfs_last_errno>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1437
+msgid ""
+"Note that the message string C<msg> 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: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1441
+msgid "The default handler prints messages on C<stderr>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1443
+msgid "If you set C<cb> to C<NULL> then I<no> handler is called."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1445
+msgid "guestfs_get_error_handler"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1447
+#, no-wrap
+msgid ""
+" guestfs_error_handler_cb guestfs_get_error_handler (guestfs_h *g,\n"
+" void **opaque_rtn);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1450
+msgid "Returns the current error handler callback."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1452
+msgid "guestfs_set_out_of_memory_handler"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1454
+#, no-wrap
+msgid ""
+" 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
+#. type: textblock
+#: ../src/guestfs.pod:1458
+msgid ""
+"The callback C<cb> will be called if there is an out of memory situation. "
+"I<Note this callback must not return>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1461
+msgid "The default is to call L<abort(3)>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1463
+msgid ""
+"You cannot set C<cb> to C<NULL>. You can't ignore out of memory situations."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1466
+msgid "guestfs_get_out_of_memory_handler"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1468
+#, no-wrap
+msgid ""
+" guestfs_abort_fn guestfs_get_out_of_memory_handler (guestfs_h *g);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1470
+msgid "This returns the current out of memory handler."
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:1472
+msgid "API CALLS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1474 ../fish/guestfish.pod:1008
+msgid "@ACTIONS@"
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:1476
+msgid "STRUCTURES"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1478
+msgid "@STRUCTS@"
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:1480
+msgid "AVAILABILITY"
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1482
+msgid "GROUPS OF FUNCTIONALITY IN THE APPLIANCE"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1484
+msgid ""
+"Using L</guestfs_available> 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
+#. type: textblock
+#: ../src/guestfs.pod:1489
+msgid "@AVAILABILITY@"
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1491
+msgid "GUESTFISH supported COMMAND"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1493
+msgid ""
+"In L<guestfish(3)> there is a handy interactive command C<supported> which "
+"prints out the available groups and whether they are supported by this build "
+"of libguestfs. Note however that you have to do C<run> first."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1498
+msgid "SINGLE CALLS AT COMPILE TIME"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1500
+msgid ""
+"Since version 1.5.8, C<E<lt>guestfs.hE<gt>> defines symbols for each C API "
+"function, such as:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1503
+#, no-wrap
+msgid ""
+" #define LIBGUESTFS_HAVE_DD 1\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1505
+msgid "if L</guestfs_dd> is available."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1507
+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: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1512
+#, no-wrap
+msgid ""
+" AC_CHECK_LIB([guestfs],[guestfs_create])\n"
+" AC_CHECK_FUNCS([guestfs_dd])\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1515
+msgid ""
+"which would result in C<HAVE_GUESTFS_DD> being either defined or not defined "
+"in your program."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1518
+msgid "SINGLE CALLS AT RUN TIME"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1520
+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<libguestfs.so> (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
+#. type: textblock
+#: ../src/guestfs.pod:1527
+msgid ""
+"You can use L<dlopen(3)> 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
+#. type: verbatim
+#: ../src/guestfs.pod:1531
+#, no-wrap
+msgid ""
+" #include <stdio.h>\n"
+" #include <stdlib.h>\n"
+" #include <unistd.h>\n"
+" #include <dlfcn.h>\n"
+" #include <guestfs.h>\n"
+" \n"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1537
+#, no-wrap
+msgid ""
+" main ()\n"
+" {\n"
+" #ifdef LIBGUESTFS_HAVE_DD\n"
+" void *dl;\n"
+" int has_function;\n"
+" \n"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1543
+#, no-wrap
+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"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1552
+#, no-wrap
+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"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1565
+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
+#. type: verbatim
+#: ../src/guestfs.pod:1570
+#, no-wrap
+msgid ""
+" Requires: libguestfs >= 1.0.80\n"
+"\n"
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:1572
+msgid "CALLS WITH OPTIONAL ARGUMENTS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1574
+msgid ""
+"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
+#. type: verbatim
+#: ../src/guestfs.pod:1579
+#, no-wrap
+msgid ""
+" int guestfs_add_drive_opts (guestfs_h *g, const char *filename, ...);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1581
+msgid ""
+"Call this with a list of optional arguments, terminated by C<-1>. So to "
+"call with no optional arguments specified:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1584
+#, no-wrap
+msgid ""
+" guestfs_add_drive_opts (g, filename, -1);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1586
+msgid "With a single optional argument:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1588
+#, no-wrap
+msgid ""
+" guestfs_add_drive_opts (g, filename,\n"
+" GUESTFS_ADD_DRIVE_OPTS_FORMAT, \"qcow2\",\n"
+" -1);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1592
+msgid "With two:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1594
+#, no-wrap
+msgid ""
+" 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
+#. type: textblock
+#: ../src/guestfs.pod:1599
+msgid ""
+"and so forth. Don't forget the terminating C<-1> otherwise Bad Things will "
+"happen!"
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1602
+msgid "USING va_list FOR OPTIONAL ARGUMENTS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1604
+msgid ""
+"The second variant has the same name with the suffix C<_va>, which works the "
+"same way but takes a C<va_list>. See the C manual for details. For the "
+"example function, this is declared:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1608
+#, no-wrap
+msgid ""
+" int guestfs_add_drive_opts_va (guestfs_h *g, const char *filename,\n"
+" va_list args);\n"
+"\n"
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1611
+msgid "CONSTRUCTING OPTIONAL ARGUMENTS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1613
+msgid ""
+"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: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1619
+#, no-wrap
+msgid ""
+" 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: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1628
+msgid "You could call it like this:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1630
+#, no-wrap
+msgid ""
+" 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
+#. type: verbatim
+#: ../src/guestfs.pod:1637
+#, no-wrap
+msgid ""
+" guestfs_add_drive_opts_argv (g, filename, &optargs);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1639 ../src/guestfs-actions.pod:11
+#: ../src/guestfs-actions.pod:1852 ../fish/guestfish-actions.pod:9
+#: ../fish/guestfish-actions.pod:1257 ../tools/virt-win-reg.pl:532
+msgid "Notes:"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1645
+msgid "The C<_BITMASK> suffix on each option name when specifying the bitmask."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1650
+msgid "You do not need to fill in all fields of the structure."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1654
+msgid ""
+"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: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1659
+msgid "OPTIONAL ARGUMENTS IN OTHER LANGUAGES"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1661
+msgid ""
+"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: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1665
+msgid "For guestfish, see L<guestfish(1)/OPTIONAL ARGUMENTS>."
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:1667
+msgid "SETTING CALLBACKS TO HANDLE EVENTS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1669
+msgid ""
+"B<Note:> This section documents the generic event mechanism introduced in "
+"libguestfs 1.10, which you should use in new code if possible. The old "
+"functions C<guestfs_set_log_message_callback>, "
+"C<guestfs_set_subprocess_quit_callback>, "
+"C<guestfs_set_launch_done_callback>, C<guestfs_set_close_callback> and "
+"C<guestfs_set_progress_callback> are no longer documented in this manual "
+"page."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1677
+msgid ""
+"Handles generate events when certain things happen, such as log messages "
+"being generated, progress messages during long-running operations, or the "
+"handle being closed. The API calls described below let you register a "
+"callback to be called when events happen. You can register multiple "
+"callbacks (for the same, different or overlapping sets of events), and "
+"individually remove callbacks. If callbacks are not removed, then they "
+"remain in force until the handle is closed."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1685
+msgid ""
+"In the current implementation, events are only generated synchronously: that "
+"means that events (and hence callbacks) can only happen while you are in the "
+"middle of making another libguestfs call. The callback is called in the "
+"same thread."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1690
+msgid ""
+"Events may contain a payload, usually nothing (void), an array of 64 bit "
+"unsigned integers, or a message buffer. Payloads are discussed later on."
+msgstr ""
+
+#. type: =head3
+#: ../src/guestfs.pod:1694
+msgid "CLASSES OF EVENTS"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:1698
+msgid "GUESTFS_EVENT_CLOSE (payload type: void)"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1701
+msgid ""
+"The callback function will be called while the handle is being closed "
+"(synchronously from L</guestfs_close>)."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1704
+msgid ""
+"Note that libguestfs installs an L<atexit(3)> 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<exit(3)>, 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: textblock
+#: ../src/guestfs.pod:1711
+msgid ""
+"If no callback is registered: the handle is closed without any callback "
+"being invoked."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:1714
+msgid "GUESTFS_EVENT_SUBPROCESS_QUIT (payload type: void)"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1717
+msgid ""
+"The callback function will be called when the child process quits, either "
+"asynchronously or if killed by L</guestfs_kill_subprocess>. (This "
+"corresponds to a transition from any state to the CONFIG state)."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1721 ../src/guestfs.pod:1730
+msgid "If no callback is registered: the event is ignored."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:1723
+msgid "GUESTFS_EVENT_LAUNCH_DONE (payload type: void)"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1726
+msgid ""
+"The callback function 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: =item
+#: ../src/guestfs.pod:1732
+msgid "GUESTFS_EVENT_PROGRESS (payload type: array of 4 x uint64_t)"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1735
+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:1741
+msgid ""
+"The callback receives in the payload four unsigned 64 bit numbers which are "
+"(in order): C<proc_nr>, C<serial>, C<position>, C<total>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1744
+msgid ""
+"The units of C<total> are not defined, although for some operations C<total> "
+"may relate in some way to the amount of data to be transferred (eg. in bytes "
+"or megabytes), and C<position> may be the portion which has been transferred."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1749
+msgid "The only defined and stable parts of the API are:"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1755
+msgid ""
+"The callback can display to the user some type of progress bar or indicator "
+"which shows the ratio of C<position>:C<total>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1760
+msgid "0 E<lt>= C<position> E<lt>= C<total>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1764
+msgid ""
+"If any progress notification is sent during a call, then a final progress "
+"notification is always sent when C<position> = C<total> (I<unless> the call "
+"fails with an error)."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1768
+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:1774
+msgid ""
+"For some calls we are unable to estimate the progress of the call, but we "
+"can still generate progress messages to indicate activity. This is known as "
+"\"pulse mode\", and is directly supported by certain progress bar "
+"implementations (eg. GtkProgressBar)."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1779
+msgid ""
+"For these calls, zero or more progress messages are generated with "
+"C<position = 0> and C<total = 1>, followed by a final message with "
+"C<position = total = 1>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1783
+msgid ""
+"As noted above, if the call fails with an error then the final message may "
+"not be generated."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1788
+msgid ""
+"The callback also receives the procedure number (C<proc_nr>) and serial "
+"number (C<serial>) 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: textblock
+#: ../src/guestfs.pod:1794
+msgid "If no callback is registered: progress messages are discarded."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:1796
+msgid "GUESTFS_EVENT_APPLIANCE (payload type: message buffer)"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1799
+msgid ""
+"The callback function is called whenever a log message is generated by qemu, "
+"the appliance kernel, guestfsd (daemon), or utility programs."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1802
+msgid ""
+"If the verbose flag (L</guestfs_set_verbose>) is set before launch (L</"
+"guestfs_launch>) then additional debug messages are generated."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1805 ../src/guestfs.pod:1819
+msgid ""
+"If no callback is registered: the messages are discarded unless the verbose "
+"flag is set in which case they are sent to stderr. You can override the "
+"printing of verbose messages to stderr by setting up a callback."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:1810
+msgid "GUESTFS_EVENT_LIBRARY (payload type: message buffer)"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1813
+msgid ""
+"The callback function is called whenever a log message is generated by the "
+"library part of libguestfs."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1816
+msgid ""
+"If the verbose flag (L</guestfs_set_verbose>) is set then additional debug "
+"messages are generated."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:1824
+msgid "GUESTFS_EVENT_TRACE (payload type: message buffer)"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1827
+msgid ""
+"The callback function is called whenever a trace message is generated. This "
+"only applies if the trace flag (L</guestfs_set_trace>) is set."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1830
+msgid ""
+"If no callback is registered: the messages are sent to stderr. You can "
+"override the printing of trace messages to stderr by setting up a callback."
+msgstr ""
+
+#. type: =head3
+#: ../src/guestfs.pod:1836
+msgid "guestfs_set_event_callback"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:1838
+#, no-wrap
+msgid ""
+" int guestfs_set_event_callback (guestfs_h *g,\n"
+" guestfs_event_callback cb,\n"
+" uint64_t event_bitmask,\n"
+" int flags,\n"
+" void *opaque);\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1844
+msgid ""
+"This function registers a callback (C<cb>) for all event classes in the "
+"C<event_bitmask>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1847
+msgid ""
+"For example, to register for all log message events, you could call this "
+"function with the bitmask C<GUESTFS_EVENT_APPLIANCE|GUESTFS_EVENT_LIBRARY>. "
+"To register a single callback for all possible classes of events, use "
+"C<GUESTFS_EVENT_ALL>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1853
+msgid "C<flags> should always be passed as 0."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1855
+msgid ""
+"C<opaque> is an opaque pointer which is passed to the callback. You can use "
+"it for any purpose."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1858
+msgid ""
+"The return value is the event handle (an integer) which you can use to "
+"delete the callback (see below)."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1861
+msgid ""
+"If there is an error, this function returns C<-1>, and sets the error in the "
+"handle in the usual way (see L</guestfs_last_error> etc.)"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1864
+msgid ""
+"Callbacks remain in effect until they are deleted, or until the handle is "
+"closed."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1867
+msgid ""
+"In the case where multiple callbacks are registered for a particular event "
+"class, all of the callbacks are called. The order in which multiple "
+"callbacks are called is not defined."
+msgstr ""
+
+#. type: =head3
+#: ../src/guestfs.pod:1871
+msgid "guestfs_delete_event_callback"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:1873
+#, no-wrap
+msgid ""
+" void guestfs_delete_event_callback (guestfs_h *g, int event_handle);\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1875
+msgid ""
+"Delete a callback that was previously registered. C<event_handle> should be "
+"the integer that was returned by a previous call to "
+"C<guestfs_set_event_callback> on the same handle."
+msgstr ""
+
+#. type: =head3
+#: ../src/guestfs.pod:1879
+msgid "guestfs_event_callback"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:1881
+#, no-wrap
+msgid ""
+" typedef void (*guestfs_event_callback) (\n"
+" guestfs_h *g,\n"
+" void *opaque,\n"
+" uint64_t event,\n"
+" int event_handle,\n"
+" int flags,\n"
+" const char *buf, size_t buf_len,\n"
+" const uint64_t *array, size_t array_len);\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1890
+msgid ""
+"This is the type of the event callback function that you have to provide."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1893
+msgid ""
+"The basic parameters are: the handle (C<g>), the opaque user pointer "
+"(C<opaque>), the event class (eg. C<GUESTFS_EVENT_PROGRESS>), the event "
+"handle, and C<flags> which in the current API you should ignore."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1897
+msgid ""
+"The remaining parameters contain the event payload (if any). Each event may "
+"contain a payload, which usually relates to the event class, but for future "
+"proofing your code should be written to handle any payload for any event "
+"class."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1902
+msgid ""
+"C<buf> and C<buf_len> contain a message buffer (if C<buf_len == 0>, then "
+"there is no message buffer). Note that this message buffer can contain "
+"arbitrary 8 bit data, including NUL bytes."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1906
+msgid ""
+"C<array> and C<array_len> is an array of 64 bit unsigned integers. At the "
+"moment this is only used for progress messages."
+msgstr ""
+
+#. type: =head3
+#: ../src/guestfs.pod:1909
+msgid "EXAMPLE: CAPTURING LOG MESSAGES"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1911
+msgid ""
+"One motivation for the generic event API was to allow GUI programs to "
+"capture debug and other messages. In libguestfs E<le> 1.8 these were sent "
+"unconditionally to C<stderr>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1915
+msgid ""
+"Events associated with log messages are: C<GUESTFS_EVENT_LIBRARY>, "
+"C<GUESTFS_EVENT_APPLIANCE> and C<GUESTFS_EVENT_TRACE>. (Note that error "
+"messages are not events; you must capture error messages separately)."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1920
+msgid ""
+"Programs have to set up a callback to capture the classes of events of "
+"interest:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:1923
+#, no-wrap
+msgid ""
+" int eh =\n"
+" guestfs_set_event_callback\n"
+" (g, message_callback,\n"
+" GUESTFS_EVENT_LIBRARY|GUESTFS_EVENT_APPLIANCE|\n"
+" GUESTFS_EVENT_TRACE,\n"
+" 0, NULL) == -1)\n"
+" if (eh == -1) {\n"
+" // handle error in the usual way\n"
+" }\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1933
+msgid ""
+"The callback can then direct messages to the appropriate place. In this "
+"example, messages are directed to syslog:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:1936
+#, no-wrap
+msgid ""
+" static void\n"
+" message_callback (\n"
+" guestfs_h *g,\n"
+" void *opaque,\n"
+" uint64_t event,\n"
+" int event_handle,\n"
+" int flags,\n"
+" const char *buf, size_t buf_len,\n"
+" const uint64_t *array, size_t array_len)\n"
+" {\n"
+" const int priority = LOG_USER|LOG_INFO;\n"
+" if (buf_len > 0)\n"
+" syslog (priority, \"event 0x%lx: %s\", event, buf);\n"
+" }\n"
+"\n"
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:1951
+msgid "PRIVATE DATA AREA"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1953
+msgid ""
+"You can attach named pieces of private data to the libguestfs handle, fetch "
+"them by name, and walk over them, for the lifetime of the handle. This is "
+"called the private data area and is only available from the C API."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1958
+msgid "To attach a named piece of data, use the following call:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1960
+#, no-wrap
+msgid ""
+" void guestfs_set_private (guestfs_h *g, const char *key, void *data);\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1962
+msgid ""
+"C<key> is the name to associate with this data, and C<data> is an arbitrary "
+"pointer (which can be C<NULL>). Any previous item with the same key is "
+"overwritten."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1966
+msgid ""
+"You can use any C<key> you want, but your key should I<not> start with an "
+"underscore character. Keys beginning with an underscore character are "
+"reserved for internal libguestfs purposes (eg. for implementing language "
+"bindings). It is recommended that you prefix the key with some unique "
+"string to avoid collisions with other users."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1972
+msgid "To retrieve the pointer, use:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:1974
+#, no-wrap
+msgid ""
+" void *guestfs_get_private (guestfs_h *g, const char *key);\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:1976
+msgid ""
+"This function returns C<NULL> if either no data is found associated with "
+"C<key>, or if the user previously set the C<key>'s C<data> pointer to "
+"C<NULL>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1980
+msgid ""
+"Libguestfs does not try to look at or interpret the C<data> pointer in any "
+"way. As far as libguestfs is concerned, it need not be a valid pointer at "
+"all. In particular, libguestfs does I<not> 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</guestfs_close> or must set up a close callback to "
+"do it (see L</GUESTFS_EVENT_CLOSE>)."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1987
+msgid "To walk over all entries, use these two functions:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:1989
+#, no-wrap
+msgid ""
+" void *guestfs_first_private (guestfs_h *g, const char **key_rtn);\n"
+"\n"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:1991
+#, no-wrap
+msgid ""
+" void *guestfs_next_private (guestfs_h *g, const char **key_rtn);\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1993
+msgid ""
+"C<guestfs_first_private> returns the first key, pointer pair (\"first\" does "
+"not have any particular meaning -- keys are not returned in any defined "
+"order). A pointer to the key is returned in C<*key_rtn> and the "
+"corresponding data pointer is returned from the function. C<NULL> is "
+"returned if there are no keys stored in the handle."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:1999
+msgid ""
+"C<guestfs_next_private> returns the next key, pointer pair. The return "
+"value of this function is also C<NULL> is there are no further entries to "
+"return."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2003
+msgid "Notes about walking over entries:"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2009
+msgid ""
+"You must not call C<guestfs_set_private> while walking over the entries."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2014
+msgid ""
+"The handle maintains an internal iterator which is reset when you call "
+"C<guestfs_first_private>. This internal iterator is invalidated when you "
+"call C<guestfs_set_private>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2020
+msgid "If you have set the data pointer associated with a key to C<NULL>, ie:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2022
+#, no-wrap
+msgid ""
+" guestfs_set_private (g, key, NULL);\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2024
+msgid "then that C<key> is not returned when walking."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2028
+msgid ""
+"C<*key_rtn> is only valid until the next call to C<guestfs_first_private>, "
+"C<guestfs_next_private> or C<guestfs_set_private>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2034
+msgid ""
+"The following example code shows how to print all keys and data pointers "
+"that are associated with the handle C<g>:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2037
+#, no-wrap
+msgid ""
+" const char *key;\n"
+" void *data = guestfs_first_private (g, &key);\n"
+" while (data != NULL)\n"
+" {\n"
+" printf (\"key = %s, data = %p\\n\", key, data);\n"
+" data = guestfs_next_private (g, &key);\n"
+" }\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2045
+msgid ""
+"More commonly you are only interested in keys that begin with an application-"
+"specific prefix C<foo_>. Modify the loop like so:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2048
+#, no-wrap
+msgid ""
+" const char *key;\n"
+" void *data = guestfs_first_private (g, &key);\n"
+" while (data != NULL)\n"
+" {\n"
+" if (strncmp (key, \"foo_\", strlen (\"foo_\")) == 0)\n"
+" printf (\"key = %s, data = %p\\n\", key, data);\n"
+" data = guestfs_next_private (g, &key);\n"
+" }\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2057
+msgid ""
+"If you need to modify keys while walking, then you have to jump back to the "
+"beginning of the loop. For example, to delete all keys prefixed with "
+"C<foo_>:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2061
+#, no-wrap
+msgid ""
+" const char *key;\n"
+" void *data;\n"
+" again:\n"
+" data = guestfs_first_private (g, &key);\n"
+" while (data != NULL)\n"
+" {\n"
+" if (strncmp (key, \"foo_\", strlen (\"foo_\")) == 0)\n"
+" {\n"
+" guestfs_set_private (g, key, NULL);\n"
+" /* note that 'key' pointer is now invalid, and so is\n"
+" the internal iterator */\n"
+" goto again;\n"
+" }\n"
+" data = guestfs_next_private (g, &key);\n"
+" }\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2077
+msgid ""
+"Note that the above loop is guaranteed to terminate because the keys are "
+"being deleted, but other manipulations of keys within the loop might not "
+"terminate unless you also maintain an indication of which keys have been "
+"visited."
+msgstr ""
+
+# type: =end
+#. type: =end
+#: ../src/guestfs.pod:2082 ../src/guestfs.pod:2087
+msgid "html"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2084
+msgid ""
+"<!-- old anchor for the next section --> <a name="
+"\"state_machine_and_low_level_event_api\"/>"
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:2089
+msgid "ARCHITECTURE"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2091
+msgid ""
+"Internally, libguestfs is implemented by running an appliance (a special "
+"type of small virtual machine) using L<qemu(1)>. Qemu runs as a child "
+"process of the main program."
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:2095
+#, 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
+#. type: textblock
+#: ../src/guestfs.pod:2115
+msgid ""
+"The library, linked to the main program, creates the child process and hence "
+"the appliance in the L</guestfs_launch> function."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2118
+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</guestfsd>. The library talks to L</guestfsd> 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
+#. type: textblock
+#: ../src/guestfs.pod:2127
+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
+#. type: =head1
+#: ../src/guestfs.pod:2134
+msgid "STATE MACHINE"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2136
+msgid "libguestfs uses a state machine to model the child process:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:2138
+#, 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
+#. type: textblock
+#: ../src/guestfs.pod:2160
+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
+#. type: textblock
+#: ../src/guestfs.pod:2165
+msgid ""
+"The guest may be killed by L</guestfs_kill_subprocess>, 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
+#. type: textblock
+#: ../src/guestfs.pod:2169
+msgid ""
+"Configuration commands for qemu such as L</guestfs_add_drive> can only be "
+"issued when in the CONFIG state."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2172
+msgid ""
+"The API offers one call that goes from CONFIG through LAUNCHING to READY. "
+"L</guestfs_launch> blocks until the child process is READY to accept "
+"commands (or until some failure or timeout). L</guestfs_launch> internally "
+"moves the state from CONFIG to LAUNCHING while it is running."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2178
+msgid ""
+"API actions such as L</guestfs_mount> 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
+#. type: textblock
+#: ../src/guestfs.pod:2184
+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
+#. type: =head1
+#: ../src/guestfs.pod:2188
+msgid "INTERNALS"
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:2190
+msgid "COMMUNICATION PROTOCOL"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2192
+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
+#. type: textblock
+#: ../src/guestfs.pod:2195
+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
+#. type: textblock
+#: ../src/guestfs.pod:2199
+msgid ""
+"The detailed format of structures is in C<src/guestfs_protocol.x> (note: "
+"this file is automatically generated)."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2202
+msgid ""
+"There are two broad cases, ordinary functions that don't have any C<FileIn> "
+"and C<FileOut> parameters, which are handled with very simple request/reply "
+"messages. Then there are functions that have any C<FileIn> or C<FileOut> "
+"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
+#. type: =head3
+#: ../src/guestfs.pod:2209
+msgid "ORDINARY FUNCTIONS (NO FILEIN/FILEOUT PARAMS)"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2211
+msgid "For ordinary functions, the request message is:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:2213
+#, 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_<foo>_args (encoded as XDR)\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2218
+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<GUESTFS_MESSAGE_MAX> bytes (currently 4MB), which means the "
+"effective size of any request is limited to somewhere under this size."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2224
+msgid ""
+"Note also that many functions don't take any arguments, in which case the "
+"C<guestfs_I<foo>_args> is completely omitted."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2227
+msgid ""
+"The header contains the procedure number (C<guestfs_proc>) which is how the "
+"receiver knows what type of args structure to expect, or none at all."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2231
+msgid ""
+"For functions that take optional arguments, the optional arguments are "
+"encoded in the C<guestfs_I<foo>_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
+#. type: textblock
+#: ../src/guestfs.pod:2239
+msgid "The reply message for ordinary functions is:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:2241
+#, 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_<foo>_ret (encoded as XDR)\n"
+"\n"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2246
+msgid ""
+"As above the C<guestfs_I<foo>_ret> structure may be completely omitted for "
+"functions that return no formal return values."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2249
+msgid ""
+"As above the total length of the reply is limited to C<GUESTFS_MESSAGE_MAX>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2252
+msgid ""
+"In the case of an error, a flag is set in the header, and the reply message "
+"is slightly changed:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:2255
+#, 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
+#. type: textblock
+#: ../src/guestfs.pod:2260
+msgid ""
+"The C<guestfs_message_error> structure contains the error message as a "
+"string."
+msgstr ""
+
+# type: =head3
+#. type: =head3
+#: ../src/guestfs.pod:2263
+msgid "FUNCTIONS THAT HAVE FILEIN PARAMETERS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2265
+msgid ""
+"A C<FileIn> parameter indicates that we transfer a file I<into> the guest. "
+"The normal request message is sent (see above). However this is followed by "
+"a sequence of file chunks."
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:2269
+#, 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_<foo>_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
+#. type: textblock
+#: ../src/guestfs.pod:2277
+msgid "The \"sequence of chunks\" is:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:2279
+#, 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
+#. type: textblock
+#: ../src/guestfs.pod:2287
+msgid ""
+"The final chunk has the C<data_len> field set to zero. Additionally a flag "
+"is set in the final chunk to indicate either successful completion or early "
+"cancellation."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2291
+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
+#. type: textblock
+#: ../src/guestfs.pod:2296
+msgid ""
+"Both the library (sender) I<and> 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<not> send any reply, and goes back to reading the next request."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2302
+msgid ""
+"The daemon may also cancel. It does this by writing a special word "
+"C<GUESTFS_CANCEL_FLAG> 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
+#. type: textblock
+#: ../src/guestfs.pod:2311
+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<GUESTFS_MAX_CHUNK_SIZE>), so that neither the library nor the daemon need "
+"to keep much in memory."
+msgstr ""
+
+# type: =head3
+#. type: =head3
+#: ../src/guestfs.pod:2317
+msgid "FUNCTIONS THAT HAVE FILEOUT PARAMETERS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2319
+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
+#. type: verbatim
+#: ../src/guestfs.pod:2322
+#, 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_<foo>_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
+#. type: =head3
+#: ../src/guestfs.pod:2330
+msgid "INITIAL MESSAGE"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2332
+msgid ""
+"When the daemon launches it sends an initial word (C<GUESTFS_LAUNCH_FLAG>) "
+"which indicates that the guest and daemon is alive. This is what L</"
+"guestfs_launch> waits for."
+msgstr ""
+
+# type: =head3
+#. type: =head3
+#: ../src/guestfs.pod:2336
+msgid "PROGRESS NOTIFICATION MESSAGES"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2338
+msgid ""
+"The daemon may send progress notification messages at any time. These are "
+"distinguished by the normal length word being replaced by "
+"C<GUESTFS_PROGRESS_FLAG>, followed by a fixed size progress message."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2342
+msgid ""
+"The library turns them into progress callbacks (see L</"
+"GUESTFS_EVENT_PROGRESS>) if there is a callback registered, or discards them "
+"if not."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2346
+msgid ""
+"The daemon self-limits the frequency of progress messages it sends (see "
+"C<daemon/proto.c:notify_progress>). Not all calls generate progress "
+"messages."
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:2350
+msgid "LIBGUESTFS VERSION NUMBERS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2352
+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
+#. type: verbatim
+#: ../src/guestfs.pod:2357
+#, 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
+#. type: textblock
+#: ../src/guestfs.pod:2368
+msgid "Thus \"1.3.5\" is the 5th update to the development branch \"1.3\"."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2370
+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
+#. type: textblock
+#: ../src/guestfs.pod:2376
+msgid "Our criteria for backporting changes are:"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2382
+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
+#. type: textblock
+#: ../src/guestfs.pod:2388
+msgid ""
+"Bug fixes which are not controversial, fix obvious problems, and have been "
+"well tested are backported."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2393
+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
+#. type: textblock
+#: ../src/guestfs.pod:2399
+msgid ""
+"We I<don't> 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
+#. type: textblock
+#: ../src/guestfs.pod:2405
+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:2413
+msgid "EXTENDING LIBGUESTFS"
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2415
+msgid "ADDING A NEW API ACTION"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2417
+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:2421
+msgid "To add a new API action there are two changes:"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2427
+msgid ""
+"You need to add a description of the call (name, parameters, return type, "
+"tests, documentation) to C<generator/generator_actions.ml>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2430
+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</ARCHITECTURE> above). L</guestfs_sync> is an example of the "
+"former, since the sync is done in the appliance. L</guestfs_set_trace> 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:2438
+msgid ""
+"Most new actions are of the first type, and get added to the "
+"C<daemon_functions> 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:2444
+msgid ""
+"For library-only actions of the second type, add to the "
+"C<non_daemon_functions> 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:2452
+msgid "Implement the action (in C):"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2454
+msgid ""
+"For daemon actions, implement the function C<do_E<lt>nameE<gt>> in the "
+"C<daemon/> directory."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2457
+msgid ""
+"For library actions, implement the function C<guestfs__E<lt>nameE<gt>> "
+"(note: double underscore) in the C<src/> directory."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2460
+msgid "In either case, use another function as an example of what to do."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2464
+msgid "After making these changes, use C<make> to compile."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2466
+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:2470
+msgid "ADDING TESTS FOR AN API ACTION"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2472
+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<generator/"
+"generator_actions.ml>), or in some rarer cases you may want to drop a script "
+"into C<regressions/>. Note that adding a script to C<regressions/> is "
+"slower, so if possible use the first method."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2478
+msgid ""
+"The following describes the test environment used when you add an API test "
+"in C<generator_actions.ml>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2481
+msgid "The test environment has 4 block devices:"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2485
+msgid "C</dev/sda> 500MB"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2487
+msgid "General block device for testing."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2489
+msgid "C</dev/sdb> 50MB"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2491
+msgid ""
+"C</dev/sdb1> is an ext2 filesystem used for testing filesystem write "
+"operations."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2494
+msgid "C</dev/sdc> 10MB"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2496
+msgid "Used in a few tests where two block devices are needed."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2498
+msgid "C</dev/sdd>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2500
+msgid "ISO with fixed content (see C<images/test.iso>)."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2504
+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</guestfs_kill_subprocess> :-x"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2508
+msgid ""
+"Each test starts with an initial scenario, selected using one of the "
+"C<Init*> expressions, described in C<generator/generator_types.ml>. These "
+"initialize the disks mentioned above in a particular way as documented in "
+"C<generator_types.ml>. You should not assume anything about the previous "
+"contents of other disks that are not initialized."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2514
+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<Always> means to run "
+"unconditionally."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2520
+msgid ""
+"In addition, packagers can skip individual tests by setting environment "
+"variables before running C<make check>."
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2523
+#, no-wrap
+msgid ""
+" SKIP_TEST_<CMD>_<NUM>=1\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2525
+msgid "eg: C<SKIP_TEST_COMMAND_3=1> skips test #3 of L</guestfs_command>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2527
+msgid "or:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2529
+#, no-wrap
+msgid ""
+" SKIP_TEST_<CMD>=1\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2531
+msgid "eg: C<SKIP_TEST_ZEROFREE=1> skips all L</guestfs_zerofree> tests."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2533
+msgid "Packagers can run only certain tests by setting for example:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2535
+#, no-wrap
+msgid ""
+" TEST_ONLY=\"vfs_type zerofree\"\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2537
+msgid ""
+"See C<capitests/tests.c> for more details of how these environment variables "
+"work."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2540
+msgid "DEBUGGING NEW API ACTIONS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2542
+msgid "Test new actions work before submitting them."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2544
+msgid "You can use guestfish to try out new commands."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2546
+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<guestfish -v>."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2550
+msgid "FORMATTING CODE AND OTHER CONVENTIONS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2552
+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:2558
+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:2561
+#, 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:2571
+#, 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:2583
+msgid "Enable warnings when compiling (and fix any problems this finds):"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2586
+#, no-wrap
+msgid ""
+" ./configure --enable-gcc-warnings\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2588
+msgid "Useful targets are:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2590
+#, 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:2593
+msgid "DAEMON CUSTOM PRINTF FORMATTERS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2595
+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:2600
+msgid "%Q"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2602
+msgid ""
+"Simple shell quoted string. Any spaces or other shell characters are "
+"escaped for you."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2605
+msgid "%R"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2607
+msgid ""
+"Same as C<%Q> except the string is treated as a path which is prefixed by "
+"the sysroot."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2612 ../fish/guestfish.pod:240 ../fish/guestfish.pod:613
+msgid "For example:"
+msgstr ""
+
+#. type: verbatim
+#: ../src/guestfs.pod:2614
+#, no-wrap
+msgid ""
+" asprintf (&cmd, \"cat %R\", path);\n"
+"\n"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2616
+msgid "would produce C<cat /sysroot/some\\ path\\ with\\ spaces>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2618
+msgid ""
+"I<Note:> Do I<not> use these when you are passing parameters to the C<command"
+"{,r,v,rv}()> 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<sysroot_path()> function however."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2624
+msgid "SUBMITTING YOUR NEW API ACTIONS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2626
+msgid ""
+"Submit patches to the mailing list: L<http://www.redhat.com/mailman/listinfo/"
+"libguestfs> and CC to L<rjones@redhat.com>."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2630
+msgid "INTERNATIONALIZATION (I18N) SUPPORT"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2632
+msgid "We support i18n (gettext anyhow) in the library."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2634
+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:2640
+msgid ""
+"Debugging messages are never translated, since they are intended for the "
+"programmers."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2643
+msgid "SOURCE CODE SUBDIRECTORIES"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2647 ../src/guestfs-actions.pod:5827
+#: ../fish/guestfish-actions.pod:3921
+msgid "C<appliance>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2649
+msgid "The libguestfs appliance, build scripts and so on."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2651
+msgid "C<capitests>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2653
+msgid "Automated tests of the C API."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2655
+msgid "C<cat>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2657
+msgid ""
+"The L<virt-cat(1)>, L<virt-filesystems(1)> and L<virt-ls(1)> commands and "
+"documentation."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2660
+msgid "C<caution>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2662
+msgid ""
+"Safety and liveness tests of components that libguestfs depends upon (not of "
+"libguestfs itself). Mainly this is for qemu and the kernel."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2665
+msgid "C<contrib>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2667
+msgid "Outside contributions, experimental parts."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2669
+msgid "C<daemon>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2671
+msgid ""
+"The daemon that runs inside the libguestfs appliance and carries out actions."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2674
+msgid "C<df>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2676
+msgid "L<virt-df(1)> command and documentation."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2678
+msgid "C<examples>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2680
+msgid "C API example code."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2682
+msgid "C<fish>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2684
+msgid ""
+"L<guestfish(1)>, the command-line shell, and various shell scripts built on "
+"top such as L<virt-copy-in(1)>, L<virt-copy-out(1)>, L<virt-tar-in(1)>, "
+"L<virt-tar-out(1)>."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2688
+msgid "C<fuse>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2690
+msgid ""
+"L<guestmount(1)>, FUSE (userspace filesystem) built on top of libguestfs."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2692
+msgid "C<generator>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2694
+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:2697
+msgid "C<images>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2699
+msgid "Files used by the test suite."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2701
+msgid "Some \"phony\" guest images which we test against."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2703
+msgid "C<inspector>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2705
+msgid "L<virt-inspector(1)>, the virtual machine image inspector."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2707
+msgid "C<logo>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2709
+msgid "Logo used on the website. The fish is called Arthur by the way."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2711
+msgid "C<m4>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2713
+msgid "M4 macros used by autoconf."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2715
+msgid "C<po>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2717
+msgid "Translations of simple gettext strings."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2719
+msgid "C<po-docs>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2721
+msgid ""
+"The build infrastructure and PO files for translations of manpages and POD "
+"files. Eventually this will be combined with the C<po> directory, but that "
+"is rather complicated."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2725
+msgid "C<regressions>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2727
+msgid "Regression tests."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2729
+msgid "C<rescue>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2731
+msgid "L<virt-rescue(1)> command and documentation."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2733
+msgid "C<src>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2735
+msgid "Source code to the C library."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2737
+msgid "C<tools>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2739
+msgid "Command line tools written in Perl (L<virt-resize(1)> and many others)."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2741
+msgid "C<test-tool>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2743
+msgid ""
+"Test tool for end users to test if their qemu/kernel combination will work "
+"with libguestfs."
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2746
+msgid "C<csharp>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2748
+msgid "C<haskell>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2750
+msgid "C<java>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2752
+msgid "C<ocaml>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2754
+msgid "C<php>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2756
+msgid "C<perl>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2758
+msgid "C<python>"
+msgstr ""
+
+#. type: =item
+#: ../src/guestfs.pod:2760
+msgid "C<ruby>"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2762
+msgid "Language bindings."
+msgstr ""
+
+#. type: =head1
+#: ../src/guestfs.pod:2766
+msgid "LIMITS"
+msgstr ""
+
+# type: =head2
+#. type: =head2
+#: ../src/guestfs.pod:2768
+msgid "PROTOCOL LIMITS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2770
+msgid ""
+"Internally libguestfs uses a message-based protocol to pass API calls and "
+"their responses to and from a small \"appliance\" (see L</INTERNALS> for "
+"plenty more detail about this). The maximum message size used by the "
+"protocol is slightly less than 4 MB. For some API calls you may need to be "
+"aware of this limit. The API calls which may be affected are individually "
+"documented, with a link back to this section of the documentation."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2778
+msgid ""
+"A simple call such as L</guestfs_cat> returns its result (the file data) in "
+"a simple string. Because this string is at some point internally encoded as "
+"a message, the maximum size that it can return is slightly under 4 MB. If "
+"the requested file is larger than this then you will get an error."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2784
+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</UPLOADING> "
+"and L</DOWNLOADING> document how to do this."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2788
+msgid ""
+"You might also consider mounting the disk image using our FUSE filesystem "
+"support (L<guestmount(1)>)."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2791
+msgid "MAXIMUM NUMBER OF DISKS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2793
+msgid "When using virtio disks (the default) the current limit is B<25> disks."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2796
+msgid ""
+"Virtio itself consumes 1 virtual PCI slot per disk, and PCI is limited to 31 "
+"slots. However febootstrap only understands disks with names C</dev/vda> "
+"through C</dev/vdz> (26 letters) and it reserves one disk for its own "
+"purposes."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2801
+msgid ""
+"We are working to substantially raise this limit in future versions but it "
+"requires complex changes to qemu."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2804
+msgid ""
+"In future versions of libguestfs it should also be possible to \"hot plug\" "
+"disks (add and remove disks after calling L</guestfs_launch>). This also "
+"requires changes to qemu."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2808
+msgid "MAXIMUM NUMBER OF PARTITIONS PER DISK"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2810
+msgid "Virtio limits the maximum number of partitions per disk to B<15>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2812
+msgid ""
+"This is because it reserves 4 bits for the minor device number (thus C</dev/"
+"vda>, and C</dev/vda1> through C</dev/vda15>)."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2815
+msgid ""
+"If you attach a disk with more than 15 partitions, the extra partitions are "
+"ignored by libguestfs."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2818
+msgid "MAXIMUM SIZE OF A DISK"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2820
+msgid "Probably the limit is between 2**63-1 and 2**64-1 bytes."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2822
+msgid ""
+"We have tested block devices up to 1 exabyte (2**60 or "
+"1,152,921,504,606,846,976 bytes) using sparse files backed by an XFS host "
+"filesystem."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2826
+msgid ""
+"Although libguestfs probably does not impose any limit, the underlying host "
+"storage will. If you store disk images on a host ext4 filesystem, then the "
+"maximum size will be limited by the maximum ext4 file size (currently 16 "
+"TB). If you store disk images as host logical volumes then you are limited "
+"by the maximum size of an LV."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2832
+msgid ""
+"For the hugest disk image files, we recommend using XFS on the host for "
+"storage."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2835
+msgid "MAXIMUM SIZE OF A PARTITION"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2837
+msgid ""
+"The MBR (ie. classic MS-DOS) partitioning scheme uses 32 bit sector "
+"numbers. Assuming a 512 byte sector size, this means that MBR cannot "
+"address a partition located beyond 2 TB on the disk."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2841
+msgid ""
+"It is recommended that you use GPT partitions on disks which are larger than "
+"this size. GPT uses 64 bit sector numbers and so can address partitions "
+"which are theoretically larger than the largest disk we could support."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2846
+msgid "MAXIMUM SIZE OF A FILESYSTEM, FILES, DIRECTORIES"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2848
+msgid ""
+"This depends on the filesystem type. libguestfs itself does not impose any "
+"known limit. Consult Wikipedia or the filesystem documentation to find out "
+"what these limits are."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2852
+msgid "MAXIMUM UPLOAD AND DOWNLOAD"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2854
+msgid ""
+"The API functions L</guestfs_upload>, L</guestfs_download>, L</"
+"guestfs_tar_in>, L</guestfs_tar_out> and the like allow unlimited sized "
+"uploads and downloads."
+msgstr ""
+
+#. type: =head2
+#: ../src/guestfs.pod:2858
+msgid "INSPECTION LIMITS"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2860
+msgid ""
+"The inspection code has several arbitrary limits on things like the size of "
+"Windows Registry hive it will read, and the length of product name. These "
+"are intended to stop a malicious guest from consuming arbitrary amounts of "
+"memory and disk space on the host, and should not be reached in practice. "
+"See the source code for more information."
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:2866 ../fish/guestfish.pod:1015
+#: ../test-tool/libguestfs-test-tool.pod:82 ../tools/virt-edit.pl:476
+msgid "ENVIRONMENT VARIABLES"
+msgstr ""
+
+# type: =item
+#. type: =item
+#: ../src/guestfs.pod:2870 ../fish/guestfish.pod:1041
+msgid "LIBGUESTFS_APPEND"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2872 ../fish/guestfish.pod:1043
+msgid "Pass additional options to the guest kernel."
+msgstr ""
+
+# type: =item
+#. type: =item
+#: ../src/guestfs.pod:2874 ../fish/guestfish.pod:1045
+msgid "LIBGUESTFS_DEBUG"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2876
+msgid ""
+"Set C<LIBGUESTFS_DEBUG=1> to enable verbose messages. This has the same "
+"effect as calling C<guestfs_set_verbose (g, 1)>."
+msgstr ""
+
+# type: =item
+#. type: =item
+#: ../src/guestfs.pod:2879 ../fish/guestfish.pod:1050
+msgid "LIBGUESTFS_MEMSIZE"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2881 ../fish/guestfish.pod:1052
+msgid ""
+"Set the memory allocated to the qemu process, in megabytes. For example:"
+msgstr ""
+
+# type: verbatim
+#. type: verbatim
+#: ../src/guestfs.pod:2884 ../fish/guestfish.pod:1055
+#, no-wrap
+msgid ""
+" LIBGUESTFS_MEMSIZE=700\n"
+"\n"
+msgstr ""
+
+# type: =item
+#. type: =item
+#: ../src/guestfs.pod:2886 ../fish/guestfish.pod:1057
+msgid "LIBGUESTFS_PATH"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2888
+msgid ""
+"Set the path that libguestfs uses to search for a supermin appliance. See "
+"the discussion of paths in section L</PATH> above."
+msgstr ""
+
+# type: =item
+#. type: =item
+#: ../src/guestfs.pod:2891 ../fish/guestfish.pod:1062
+msgid "LIBGUESTFS_QEMU"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2893 ../fish/guestfish.pod:1064
+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
+#. type: textblock
+#: ../src/guestfs.pod:2897
+msgid "See also L</QEMU WRAPPERS> above."
+msgstr ""
+
+# type: =item
+#. type: =item
+#: ../src/guestfs.pod:2899 ../fish/guestfish.pod:1068
+msgid "LIBGUESTFS_TRACE"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2901
+msgid ""
+"Set C<LIBGUESTFS_TRACE=1> to enable command traces. This has the same "
+"effect as calling C<guestfs_set_trace (g, 1)>."
+msgstr ""
+
+# type: =item
+#. type: =item
+#: ../src/guestfs.pod:2904 ../fish/guestfish.pod:1077
+msgid "TMPDIR"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2906 ../fish/guestfish.pod:1079
+msgid ""
+"Location of temporary directory, defaults to C</tmp> except for the cached "
+"supermin appliance which defaults to C</var/tmp>."
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2909 ../fish/guestfish.pod:1082
+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</var/tmp> is not large enough."
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:2917 ../fish/guestfish.pod:1149
+#: ../test-tool/libguestfs-test-tool.pod:87 ../fuse/guestmount.pod:277
+#: ../tools/virt-edit.pl:496 ../tools/virt-win-reg.pl:572
+#: ../tools/virt-list-filesystems.pl:189 ../tools/virt-tar.pl:286
+#: ../tools/virt-make-fs.pl:539 ../tools/virt-list-partitions.pl:257
+msgid "SEE ALSO"
+msgstr ""
+
+#. type: textblock
+#: ../src/guestfs.pod:2919
+msgid ""
+"L<guestfs-examples(3)>, L<guestfs-ocaml(3)>, L<guestfs-python(3)>, L<guestfs-"
+"ruby(3)>, L<guestfish(1)>, L<guestmount(1)>, L<virt-cat(1)>, L<virt-copy-in"
+"(1)>, L<virt-copy-out(1)>, L<virt-df(1)>, L<virt-edit(1)>, L<virt-filesystems"
+"(1)>, L<virt-inspector(1)>, L<virt-list-filesystems(1)>, L<virt-list-"
+"partitions(1)>, L<virt-ls(1)>, L<virt-make-fs(1)>, L<virt-rescue(1)>, L<virt-"
+"tar(1)>, L<virt-tar-in(1)>, L<virt-tar-out(1)>, L<virt-win-reg(1)>, L<qemu(1)"
+">, L<febootstrap(1)>, L<hivex(3)>, L<http://libguestfs.org/>."
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2946
+msgid ""
+"Tools with a similar purpose: L<fdisk(8)>, L<parted(8)>, L<kpartx(8)>, L<lvm"
+"(8)>, L<disktype(1)>."
+msgstr ""
+
+# type: =head1
+#. type: =head1
+#: ../src/guestfs.pod:2953 ../tools/virt-win-reg.pl:587
+#: ../tools/virt-make-fs.pl:553
+msgid "BUGS"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2955
+msgid "To get a list of bugs against libguestfs use this link:"
+msgstr ""
+
+# type: textblock
+#. type: textblock
+#: ../src/guestfs.pod:2957
+msgid ""
+"L<https://bugzilla.redhat.com/buglist.cgi?"
+"component=libguestfs&product=Virtualization+Tools>"
git.annexia.org / libguestfs.git / blobdiff