X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=src%2Fgenerator.ml;h=3f42c391f6e9fa1fd4f1d612f74b813c232f487a;hp=02fe6912c0d2eb7411a10a87b97483cd4cedee1c;hb=e7eca50046e9a69dac27c0bee832af0a3014e02c;hpb=8d0068a752ee8e6bc223de5cb7cac5d190a8855e diff --git a/src/generator.ml b/src/generator.ml index 02fe691..3f42c39 100755 --- a/src/generator.ml +++ b/src/generator.ml @@ -1,4 +1,4 @@ -#!/usr/bin/ocamlrun ocaml +#!/usr/bin/env ocaml (* libguestfs * Copyright (C) 2009 Red Hat Inc. * @@ -26,14 +26,170 @@ open Printf -type styles = - | Int_Void (* int foo (guestfs_h); *) - | Int_String (* int foo (guestfs_h, const char * ); *) - | Int_StringString (* int foo (guestfs_h, const char *, const char * ); *) +type style = ret * args +and ret = + (* "Err" as a return value means an int used as a simple error + * indication, ie. 0 or -1. + *) + | Err + (* "Int" as a return value means an int which is -1 for error + * or any value >= 0 on success. + *) + | RInt of string + (* "RBool" is a bool return value which can be true/false or + * -1 for error. + *) + | RBool of string + (* "RConstString" is a string that refers to a constant value. + * Try to avoid using this. In particular you cannot use this + * for values returned from the daemon, because there is no + * thread-safe way to return them in the C API. + *) + | RConstString of string + (* "RString" and "RStringList" are caller-frees. *) + | RString of string + | RStringList of string + (* Some limited tuples are possible: *) + | RIntBool of string * string + (* LVM PVs, VGs and LVs. *) + | RPVList of string + | RVGList of string + | RLVList of string +and args = + (* 0 arguments, 1 argument, etc. The guestfs_h param is implicit. *) + | P0 + | P1 of argt + | P2 of argt * argt + | P3 of argt * argt * argt +and argt = + | String of string (* const char *name, cannot be NULL *) + | OptString of string (* const char *name, may be NULL *) + | Bool of string (* boolean *) + | Int of string (* int (smallish ints, signed, <= 31 bits) *) -let functions = [ - ("mount", Int_StringString, [|"device"; "mountpoint"|], - "Mount a guest disk at a position in the filesystem", +type flags = + | ProtocolLimitWarning (* display warning about protocol size limits *) + | FishAlias of string (* provide an alias for this cmd in guestfish *) + | FishAction of string (* call this function in guestfish *) + | NotInFish (* do not export via guestfish *) + +(* Note about long descriptions: When referring to another + * action, use the format C (ie. the full name of + * the C function). This will be replaced as appropriate in other + * language bindings. + * + * Apart from that, long descriptions are just perldoc paragraphs. + *) + +let non_daemon_functions = [ + ("launch", (Err, P0), -1, [FishAlias "run"; FishAction "launch"], + "launch the qemu subprocess", + "\ +Internally libguestfs is implemented by running a virtual machine +using L. + +You should call this after configuring the handle +(eg. adding drives) but before performing any actions."); + + ("wait_ready", (Err, P0), -1, [NotInFish], + "wait until the qemu subprocess launches", + "\ +Internally libguestfs is implemented by running a virtual machine +using L. + +You should call this after C to wait for the launch +to complete."); + + ("kill_subprocess", (Err, P0), -1, [], + "kill the qemu subprocess", + "\ +This kills the qemu subprocess. You should never need to call this."); + + ("add_drive", (Err, P1 (String "filename")), -1, [FishAlias "add"], + "add an image to examine or modify", + "\ +This function adds a virtual machine disk image C to the +guest. The first time you call this function, the disk appears as IDE +disk 0 (C) in the guest, the second time as C, and +so on. + +You don't necessarily need to be root when using libguestfs. However +you obviously do need sufficient permissions to access the filename +for whatever operations you want to perform (ie. read access if you +just want to read the image or write access if you want to modify the +image). + +This is equivalent to the qemu parameter C<-drive file=filename>."); + + ("add_cdrom", (Err, P1 (String "filename")), -1, [FishAlias "cdrom"], + "add a CD-ROM disk image to examine", + "\ +This function adds a virtual CD-ROM disk image to the guest. + +This is equivalent to the qemu parameter C<-cdrom filename>."); + + ("config", (Err, P2 (String "qemuparam", OptString "qemuvalue")), -1, [], + "add qemu parameters", + "\ +This can be used to add arbitrary qemu command line parameters +of the form C<-param value>. Actually it's not quite arbitrary - we +prevent you from setting some parameters which would interfere with +parameters that we use. + +The first character of C string must be a C<-> (dash). + +C can be NULL."); + + ("set_path", (Err, P1 (String "path")), -1, [FishAlias "path"], + "set the search path", + "\ +Set the path that libguestfs searches for kernel and initrd.img. + +The default is C<$libdir/guestfs> unless overridden by setting +C environment variable. + +The string C is stashed in the libguestfs handle, so the caller +must make sure it remains valid for the lifetime of the handle. + +Setting C to C restores the default path."); + + ("get_path", (RConstString "path", P0), -1, [], + "get the search path", + "\ +Return the current search path. + +This is always non-NULL. If it wasn't set already, then this will +return the default path."); + + ("set_autosync", (Err, P1 (Bool "autosync")), -1, [FishAlias "autosync"], + "set autosync mode", + "\ +If C is true, this enables autosync. Libguestfs will make a +best effort attempt to run C when the handle is closed +(also if the program exits without closing handles)."); + + ("get_autosync", (RBool "autosync", P0), -1, [], + "get autosync mode", + "\ +Get the autosync flag."); + + ("set_verbose", (Err, P1 (Bool "verbose")), -1, [FishAlias "verbose"], + "set verbose mode", + "\ +If C is true, this turns on verbose messages (to C). + +Verbose messages are disabled unless the environment variable +C is defined and set to C<1>."); + + ("get_verbose", (RBool "verbose", P0), -1, [], + "get verbose mode", + "\ +This returns the verbose messages flag.") +] + +let daemon_functions = [ + ("mount", (Err, P2 (String "device", String "mountpoint")), 1, [], + "mount a guest disk at a position in the filesystem", "\ Mount a guest disk at a position in the filesystem. Block devices are named C, C and so on, as they were added to @@ -44,29 +200,480 @@ names can be used. The rules are the same as for L: A filesystem must first be mounted on C before others can be mounted. Other filesystems can only be mounted on directories which already -exist."); +exist. + +The mounted filesystem is writable, if we have sufficient permissions +on the underlying device. - ("sync", Int_Void, [||], - "Sync disks, writes are flushed through to the disk image", +The filesystem options C and C are set with this +call, in order to improve reliability."); + + ("sync", (Err, P0), 2, [], + "sync disks, writes are flushed through to the disk image", "\ This syncs the disk, so that any writes are flushed through to the underlying disk image. You should always call this if you have modified a disk image, before -calling C."); +closing the handle."); - ("touch", Int_String, [|"path"|], - "Update file timestamps or create a new file", + ("touch", (Err, P1 (String "path")), 3, [], + "update file timestamps or create a new file", "\ Touch acts like the L command. It can be used to -update the filesystems on a file, or, if the file does not exist, +update the timestamps on a file, or, if the file does not exist, to create a new zero-length file."); + + ("cat", (RString "content", P1 (String "path")), 4, [ProtocolLimitWarning], + "list the contents of a file", + "\ +Return the contents of the file named C. + +Note that this function cannot correctly handle binary files +(specifically, files containing C<\\0> character which is treated +as end of string). For those you need to use the C +function which has a more complex interface."); + + ("ll", (RString "listing", P1 (String "directory")), 5, [], + "list the files in a directory (long format)", + "\ +List the files in C (relative to the root directory, +there is no cwd) in the format of 'ls -la'. + +This command is mostly useful for interactive sessions. It +is I intended that you try to parse the output string."); + + ("ls", (RStringList "listing", P1 (String "directory")), 6, [], + "list the files in a directory", + "\ +List the files in C (relative to the root directory, +there is no cwd). The '.' and '..' entries are not returned, but +hidden files are shown. + +This command is mostly useful for interactive sessions. Programs +should probably use C instead."); + + ("list_devices", (RStringList "devices", P0), 7, [], + "list the block devices", + "\ +List all the block devices. + +The full block device names are returned, eg. C"); + + ("list_partitions", (RStringList "partitions", P0), 8, [], + "list the partitions", + "\ +List all the partitions detected on all block devices. + +The full partition device names are returned, eg. C + +This does not return logical volumes. For that you will need to +call C."); + + ("pvs", (RStringList "physvols", P0), 9, [], + "list the LVM physical volumes (PVs)", + "\ +List all the physical volumes detected. This is the equivalent +of the L command. + +This returns a list of just the device names that contain +PVs (eg. C). + +See also C."); + + ("vgs", (RStringList "volgroups", P0), 10, [], + "list the LVM volume groups (VGs)", + "\ +List all the volumes groups detected. This is the equivalent +of the L command. + +This returns a list of just the volume group names that were +detected (eg. C). + +See also C."); + + ("lvs", (RStringList "logvols", P0), 11, [], + "list the LVM logical volumes (LVs)", + "\ +List all the logical volumes detected. This is the equivalent +of the L command. + +This returns a list of the logical volume device names +(eg. C). + +See also C."); + + ("pvs_full", (RPVList "physvols", P0), 12, [], + "list the LVM physical volumes (PVs)", + "\ +List all the physical volumes detected. This is the equivalent +of the L command. The \"full\" version includes all fields."); + + ("vgs_full", (RVGList "volgroups", P0), 13, [], + "list the LVM volume groups (VGs)", + "\ +List all the volumes groups detected. This is the equivalent +of the L command. The \"full\" version includes all fields."); + + ("lvs_full", (RLVList "logvols", P0), 14, [], + "list the LVM logical volumes (LVs)", + "\ +List all the logical volumes detected. This is the equivalent +of the L command. The \"full\" version includes all fields."); + + ("read_lines", (RStringList "lines", P1 (String "path")), 15, [], + "read file as lines", + "\ +Return the contents of the file named C. + +The file contents are returned as a list of lines. Trailing +C and C character sequences are I returned. + +Note that this function cannot correctly handle binary files +(specifically, files containing C<\\0> character which is treated +as end of line). For those you need to use the C +function which has a more complex interface."); + + ("aug_init", (Err, P2 (String "root", Int "flags")), 16, [], + "create a new Augeas handle", + "\ +Create a new Augeas handle for editing configuration files. +If there was any previous Augeas handle associated with this +guestfs session, then it is closed. + +You must call this before using any other C +commands. + +C is the filesystem root. C must not be NULL, +use C instead. + +The flags are the same as the flags defined in +Eaugeas.hE, the logical I of the following +integers: + +=over 4 + +=item 1 C + +Keep the original file with a C<.augsave> extension. + +=item 2 C + +Save changes into a file with extension C<.augnew>, and +do not overwrite original. Overrides C. + +=item 4 C + +Typecheck lenses (can be expensive). + +=item 8 C + +Do not use standard load path for modules. + +=item 16 C + +Make save a no-op, just record what would have been changed. + +=item 32 C + +Do not load the tree in C. + +=back + +To close the handle, you can call C. + +To find out more about Augeas, see L."); + + ("aug_close", (Err, P0), 26, [], + "close the current Augeas handle", + "\ +Close the current Augeas handle and free up any resources +used by it. After calling this, you have to call +C again before you can use any other +Augeas functions."); + + ("aug_defvar", (RInt "nrnodes", P2 (String "name", OptString "expr")), 17, [], + "define an Augeas variable", + "\ +Defines an Augeas variable C whose value is the result +of evaluating C. If C is NULL, then C is +undefined. + +On success this returns the number of nodes in C, or +C<0> if C evaluates to something which is not a nodeset."); + + ("aug_defnode", (RIntBool ("nrnodes", "created"), P3 (String "name", String "expr", String "val")), 18, [], + "define an Augeas node", + "\ +Defines a variable C whose value is the result of +evaluating C. + +If C evaluates to an empty nodeset, a node is created, +equivalent to calling C C, C. +C will be the nodeset containing that single node. + +On success this returns a pair containing the +number of nodes in the nodeset, and a boolean flag +if a node was created."); + + ("aug_get", (RString "val", P1 (String "path")), 19, [], + "look up the value of an Augeas path", + "\ +Look up the value associated with C. If C +matches exactly one node, the C is returned."); + + ("aug_set", (Err, P2 (String "path", String "val")), 20, [], + "set Augeas path to value", + "\ +Set the value associated with C to C."); + + ("aug_insert", (Err, P3 (String "path", String "label", Bool "before")), 21, [], + "insert a sibling Augeas node", + "\ +Create a new sibling C