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2 # WARNING: THIS FILE IS GENERATED BY 'src/generator.ml'.
3 # ANY CHANGES YOU MAKE TO THIS FILE WILL BE LOST.
5 # Copyright (C) 2009 Red Hat Inc.
7 # This library is free software; you can redistribute it and/or
8 # modify it under the terms of the GNU Lesser General Public
9 # License as published by the Free Software Foundation; either
10 # version 2 of the License, or (at your option) any later version.
12 # This library is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 # Lesser General Public License for more details.
17 # You should have received a copy of the GNU Lesser General Public
18 # License along with this library; if not, write to the Free Software
19 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 Sys::Guestfs - Perl bindings for libguestfs
31 my $h = Sys::Guestfs->new ();
32 $h->add_drive ('guest.img');
35 $h->mount ('/dev/sda1', '/');
41 The C<Sys::Guestfs> module provides a Perl XS binding to the
42 libguestfs API for examining and modifying virtual machine
45 Amongst the things this is good for: making batch configuration
46 changes to guests, getting disk used/free statistics (see also:
47 virt-df), migrating between virtualization systems (see also:
48 virt-p2v), performing partial backups, performing partial guest
49 clones, cloning guests and changing registry/UUID/hostname info, and
52 Libguestfs uses Linux kernel and qemu code, and can access any type of
53 guest filesystem that Linux and qemu can, including but not limited
54 to: ext2/3/4, btrfs, FAT and NTFS, LVM, many different disk partition
55 schemes, qcow, qcow2, vmdk.
57 Libguestfs provides ways to enumerate guest storage (eg. partitions,
58 LVs, what filesystem is in each LV, etc.). It can also run commands
59 in the context of the guest. Also you can access filesystems over FTP.
63 All errors turn into calls to C<croak> (see L<Carp(3)>).
77 XSLoader::load ('Sys::Guestfs');
79 =item $h = Sys::Guestfs->new ();
81 Create a new guestfs handle.
87 my $class = ref ($proto) || $proto;
89 my $self = Sys::Guestfs::_create ();
94 =item $h->add_cdrom ($filename);
96 This function adds a virtual CD-ROM disk image to the guest.
98 This is equivalent to the qemu parameter C<-cdrom filename>.
100 =item $h->add_drive ($filename);
102 This function adds a virtual machine disk image C<filename> to the
103 guest. The first time you call this function, the disk appears as IDE
104 disk 0 (C</dev/sda>) in the guest, the second time as C</dev/sdb>, and
107 You don't necessarily need to be root when using libguestfs. However
108 you obviously do need sufficient permissions to access the filename
109 for whatever operations you want to perform (ie. read access if you
110 just want to read the image or write access if you want to modify the
113 This is equivalent to the qemu parameter C<-drive file=filename>.
115 =item $h->aug_close ();
117 Close the current Augeas handle and free up any resources
118 used by it. After calling this, you have to call
119 C<$h-E<gt>aug_init> again before you can use any other
122 =item ($nrnodes, $created) = $h->aug_defnode ($name, $expr, $val);
124 Defines a variable C<name> whose value is the result of
127 If C<expr> evaluates to an empty nodeset, a node is created,
128 equivalent to calling C<$h-E<gt>aug_set> C<expr>, C<value>.
129 C<name> will be the nodeset containing that single node.
131 On success this returns a pair containing the
132 number of nodes in the nodeset, and a boolean flag
133 if a node was created.
135 =item $nrnodes = $h->aug_defvar ($name, $expr);
137 Defines an Augeas variable C<name> whose value is the result
138 of evaluating C<expr>. If C<expr> is NULL, then C<name> is
141 On success this returns the number of nodes in C<expr>, or
142 C<0> if C<expr> evaluates to something which is not a nodeset.
144 =item $val = $h->aug_get ($path);
146 Look up the value associated with C<path>. If C<path>
147 matches exactly one node, the C<value> is returned.
149 =item $h->aug_init ($root, $flags);
151 Create a new Augeas handle for editing configuration files.
152 If there was any previous Augeas handle associated with this
153 guestfs session, then it is closed.
155 You must call this before using any other C<$h-E<gt>aug_*>
158 C<root> is the filesystem root. C<root> must not be NULL,
161 The flags are the same as the flags defined in
162 E<lt>augeas.hE<gt>, the logical I<or> of the following
167 =item C<AUG_SAVE_BACKUP> = 1
169 Keep the original file with a C<.augsave> extension.
171 =item C<AUG_SAVE_NEWFILE> = 2
173 Save changes into a file with extension C<.augnew>, and
174 do not overwrite original. Overrides C<AUG_SAVE_BACKUP>.
176 =item C<AUG_TYPE_CHECK> = 4
178 Typecheck lenses (can be expensive).
180 =item C<AUG_NO_STDINC> = 8
182 Do not use standard load path for modules.
184 =item C<AUG_SAVE_NOOP> = 16
186 Make save a no-op, just record what would have been changed.
188 =item C<AUG_NO_LOAD> = 32
190 Do not load the tree in C<$h-E<gt>aug_init>.
194 To close the handle, you can call C<$h-E<gt>aug_close>.
196 To find out more about Augeas, see L<http://augeas.net/>.
198 =item $h->aug_insert ($path, $label, $before);
200 Create a new sibling C<label> for C<path>, inserting it into
201 the tree before or after C<path> (depending on the boolean
204 C<path> must match exactly one existing node in the tree, and
205 C<label> must be a label, ie. not contain C</>, C<*> or end
206 with a bracketed index C<[N]>.
208 =item $h->aug_load ();
210 Load files into the tree.
212 See C<aug_load> in the Augeas documentation for the full gory
215 =item @matches = $h->aug_ls ($path);
217 This is just a shortcut for listing C<$h-E<gt>aug_match>
218 C<path/*> and sorting the resulting nodes into alphabetical order.
220 =item @matches = $h->aug_match ($path);
222 Returns a list of paths which match the path expression C<path>.
223 The returned paths are sufficiently qualified so that they match
224 exactly one node in the current tree.
226 =item $h->aug_mv ($src, $dest);
228 Move the node C<src> to C<dest>. C<src> must match exactly
229 one node. C<dest> is overwritten if it exists.
231 =item $nrnodes = $h->aug_rm ($path);
233 Remove C<path> and all of its children.
235 On success this returns the number of entries which were removed.
237 =item $h->aug_save ();
239 This writes all pending changes to disk.
241 The flags which were passed to C<$h-E<gt>aug_init> affect exactly
244 =item $h->aug_set ($path, $val);
246 Set the value associated with C<path> to C<value>.
248 =item $h->blockdev_flushbufs ($device);
250 This tells the kernel to flush internal buffers associated
253 This uses the L<blockdev(8)> command.
255 =item $blocksize = $h->blockdev_getbsz ($device);
257 This returns the block size of a device.
259 (Note this is different from both I<size in blocks> and
260 I<filesystem block size>).
262 This uses the L<blockdev(8)> command.
264 =item $ro = $h->blockdev_getro ($device);
266 Returns a boolean indicating if the block device is read-only
267 (true if read-only, false if not).
269 This uses the L<blockdev(8)> command.
271 =item $sizeinbytes = $h->blockdev_getsize64 ($device);
273 This returns the size of the device in bytes.
275 See also C<$h-E<gt>blockdev_getsz>.
277 This uses the L<blockdev(8)> command.
279 =item $sectorsize = $h->blockdev_getss ($device);
281 This returns the size of sectors on a block device.
282 Usually 512, but can be larger for modern devices.
284 (Note, this is not the size in sectors, use C<$h-E<gt>blockdev_getsz>
287 This uses the L<blockdev(8)> command.
289 =item $sizeinsectors = $h->blockdev_getsz ($device);
291 This returns the size of the device in units of 512-byte sectors
292 (even if the sectorsize isn't 512 bytes ... weird).
294 See also C<$h-E<gt>blockdev_getss> for the real sector size of
295 the device, and C<$h-E<gt>blockdev_getsize64> for the more
296 useful I<size in bytes>.
298 This uses the L<blockdev(8)> command.
300 =item $h->blockdev_rereadpt ($device);
302 Reread the partition table on C<device>.
304 This uses the L<blockdev(8)> command.
306 =item $h->blockdev_setbsz ($device, $blocksize);
308 This sets the block size of a device.
310 (Note this is different from both I<size in blocks> and
311 I<filesystem block size>).
313 This uses the L<blockdev(8)> command.
315 =item $h->blockdev_setro ($device);
317 Sets the block device named C<device> to read-only.
319 This uses the L<blockdev(8)> command.
321 =item $h->blockdev_setrw ($device);
323 Sets the block device named C<device> to read-write.
325 This uses the L<blockdev(8)> command.
327 =item $content = $h->cat ($path);
329 Return the contents of the file named C<path>.
331 Note that this function cannot correctly handle binary files
332 (specifically, files containing C<\0> character which is treated
333 as end of string). For those you need to use the C<$h-E<gt>download>
334 function which has a more complex interface.
336 Because of the message protocol, there is a transfer limit
337 of somewhere between 2MB and 4MB. To transfer large files you should use
340 =item $checksum = $h->checksum ($csumtype, $path);
342 This call computes the MD5, SHAx or CRC checksum of the
345 The type of checksum to compute is given by the C<csumtype>
346 parameter which must have one of the following values:
352 Compute the cyclic redundancy check (CRC) specified by POSIX
353 for the C<cksum> command.
357 Compute the MD5 hash (using the C<md5sum> program).
361 Compute the SHA1 hash (using the C<sha1sum> program).
365 Compute the SHA224 hash (using the C<sha224sum> program).
369 Compute the SHA256 hash (using the C<sha256sum> program).
373 Compute the SHA384 hash (using the C<sha384sum> program).
377 Compute the SHA512 hash (using the C<sha512sum> program).
381 The checksum is returned as a printable string.
383 =item $h->chmod ($mode, $path);
385 Change the mode (permissions) of C<path> to C<mode>. Only
386 numeric modes are supported.
388 =item $h->chown ($owner, $group, $path);
390 Change the file owner to C<owner> and group to C<group>.
392 Only numeric uid and gid are supported. If you want to use
393 names, you will need to locate and parse the password file
394 yourself (Augeas support makes this relatively easy).
396 =item $output = $h->command (\@arguments);
398 This call runs a command from the guest filesystem. The
399 filesystem must be mounted, and must contain a compatible
400 operating system (ie. something Linux, with the same
401 or compatible processor architecture).
403 The single parameter is an argv-style list of arguments.
404 The first element is the name of the program to run.
405 Subsequent elements are parameters. The list must be
406 non-empty (ie. must contain a program name).
408 The C<$PATH> environment variable will contain at least
409 C</usr/bin> and C</bin>. If you require a program from
410 another location, you should provide the full path in the
413 Shared libraries and data files required by the program
414 must be available on filesystems which are mounted in the
415 correct places. It is the caller's responsibility to ensure
416 all filesystems that are needed are mounted at the right
419 =item @lines = $h->command_lines (\@arguments);
421 This is the same as C<$h-E<gt>command>, but splits the
422 result into a list of lines.
424 =item $h->config ($qemuparam, $qemuvalue);
426 This can be used to add arbitrary qemu command line parameters
427 of the form C<-param value>. Actually it's not quite arbitrary - we
428 prevent you from setting some parameters which would interfere with
429 parameters that we use.
431 The first character of C<param> string must be a C<-> (dash).
433 C<value> can be NULL.
435 =item $result = $h->debug ($subcmd, \@extraargs);
437 The C<$h-E<gt>debug> command exposes some internals of
438 C<guestfsd> (the guestfs daemon) that runs inside the
441 There is no comprehensive help for this command. You have
442 to look at the file C<daemon/debug.c> in the libguestfs source
443 to find out what you can do.
445 =item $h->download ($remotefilename, $filename);
447 Download file C<remotefilename> and save it as C<filename>
448 on the local machine.
450 C<filename> can also be a named pipe.
452 See also C<$h-E<gt>upload>, C<$h-E<gt>cat>.
454 =item $existsflag = $h->exists ($path);
456 This returns C<true> if and only if there is a file, directory
457 (or anything) with the given C<path> name.
459 See also C<$h-E<gt>is_file>, C<$h-E<gt>is_dir>, C<$h-E<gt>stat>.
461 =item $description = $h->file ($path);
463 This call uses the standard L<file(1)> command to determine
464 the type or contents of the file. This also works on devices,
465 for example to find out whether a partition contains a filesystem.
467 The exact command which runs is C<file -bsL path>. Note in
468 particular that the filename is not prepended to the output
471 =item $autosync = $h->get_autosync ();
473 Get the autosync flag.
475 =item $path = $h->get_path ();
477 Return the current search path.
479 This is always non-NULL. If it wasn't set already, then this will
480 return the default path.
482 =item $qemu = $h->get_qemu ();
484 Return the current qemu binary.
486 This is always non-NULL. If it wasn't set already, then this will
487 return the default qemu binary name.
489 =item $state = $h->get_state ();
491 This returns the current state as an opaque integer. This is
492 only useful for printing debug and internal error messages.
494 For more information on states, see L<guestfs(3)>.
496 =item $verbose = $h->get_verbose ();
498 This returns the verbose messages flag.
500 =item $busy = $h->is_busy ();
502 This returns true iff this handle is busy processing a command
503 (in the C<BUSY> state).
505 For more information on states, see L<guestfs(3)>.
507 =item $config = $h->is_config ();
509 This returns true iff this handle is being configured
510 (in the C<CONFIG> state).
512 For more information on states, see L<guestfs(3)>.
514 =item $dirflag = $h->is_dir ($path);
516 This returns C<true> if and only if there is a directory
517 with the given C<path> name. Note that it returns false for
518 other objects like files.
520 See also C<$h-E<gt>stat>.
522 =item $fileflag = $h->is_file ($path);
524 This returns C<true> if and only if there is a file
525 with the given C<path> name. Note that it returns false for
526 other objects like directories.
528 See also C<$h-E<gt>stat>.
530 =item $launching = $h->is_launching ();
532 This returns true iff this handle is launching the subprocess
533 (in the C<LAUNCHING> state).
535 For more information on states, see L<guestfs(3)>.
537 =item $ready = $h->is_ready ();
539 This returns true iff this handle is ready to accept commands
540 (in the C<READY> state).
542 For more information on states, see L<guestfs(3)>.
544 =item $h->kill_subprocess ();
546 This kills the qemu subprocess. You should never need to call this.
550 Internally libguestfs is implemented by running a virtual machine
553 You should call this after configuring the handle
554 (eg. adding drives) but before performing any actions.
556 =item @devices = $h->list_devices ();
558 List all the block devices.
560 The full block device names are returned, eg. C</dev/sda>
562 =item @partitions = $h->list_partitions ();
564 List all the partitions detected on all block devices.
566 The full partition device names are returned, eg. C</dev/sda1>
568 This does not return logical volumes. For that you will need to
571 =item $listing = $h->ll ($directory);
573 List the files in C<directory> (relative to the root directory,
574 there is no cwd) in the format of 'ls -la'.
576 This command is mostly useful for interactive sessions. It
577 is I<not> intended that you try to parse the output string.
579 =item @listing = $h->ls ($directory);
581 List the files in C<directory> (relative to the root directory,
582 there is no cwd). The '.' and '..' entries are not returned, but
583 hidden files are shown.
585 This command is mostly useful for interactive sessions. Programs
586 should probably use C<$h-E<gt>readdir> instead.
588 =item %statbuf = $h->lstat ($path);
590 Returns file information for the given C<path>.
592 This is the same as C<$h-E<gt>stat> except that if C<path>
593 is a symbolic link, then the link is stat-ed, not the file it
596 This is the same as the C<lstat(2)> system call.
598 =item $h->lvcreate ($logvol, $volgroup, $mbytes);
600 This creates an LVM volume group called C<logvol>
601 on the volume group C<volgroup>, with C<size> megabytes.
603 =item $h->lvm_remove_all ();
605 This command removes all LVM logical volumes, volume groups
606 and physical volumes.
608 B<This command is dangerous. Without careful use you
609 can easily destroy all your data>.
611 =item $h->lvremove ($device);
613 Remove an LVM logical volume C<device>, where C<device> is
614 the path to the LV, such as C</dev/VG/LV>.
616 You can also remove all LVs in a volume group by specifying
617 the VG name, C</dev/VG>.
619 =item @logvols = $h->lvs ();
621 List all the logical volumes detected. This is the equivalent
622 of the L<lvs(8)> command.
624 This returns a list of the logical volume device names
625 (eg. C</dev/VolGroup00/LogVol00>).
627 See also C<$h-E<gt>lvs_full>.
629 =item @logvols = $h->lvs_full ();
631 List all the logical volumes detected. This is the equivalent
632 of the L<lvs(8)> command. The "full" version includes all fields.
634 =item $h->mkdir ($path);
636 Create a directory named C<path>.
638 =item $h->mkdir_p ($path);
640 Create a directory named C<path>, creating any parent directories
641 as necessary. This is like the C<mkdir -p> shell command.
643 =item $h->mkfs ($fstype, $device);
645 This creates a filesystem on C<device> (usually a partition
646 of LVM logical volume). The filesystem type is C<fstype>, for
649 =item $h->mount ($device, $mountpoint);
651 Mount a guest disk at a position in the filesystem. Block devices
652 are named C</dev/sda>, C</dev/sdb> and so on, as they were added to
653 the guest. If those block devices contain partitions, they will have
654 the usual names (eg. C</dev/sda1>). Also LVM C</dev/VG/LV>-style
657 The rules are the same as for L<mount(2)>: A filesystem must
658 first be mounted on C</> before others can be mounted. Other
659 filesystems can only be mounted on directories which already
662 The mounted filesystem is writable, if we have sufficient permissions
663 on the underlying device.
665 The filesystem options C<sync> and C<noatime> are set with this
666 call, in order to improve reliability.
668 =item $h->mount_options ($options, $device, $mountpoint);
670 This is the same as the C<$h-E<gt>mount> command, but it
671 allows you to set the mount options as for the
672 L<mount(8)> I<-o> flag.
674 =item $h->mount_ro ($device, $mountpoint);
676 This is the same as the C<$h-E<gt>mount> command, but it
677 mounts the filesystem with the read-only (I<-o ro>) flag.
679 =item $h->mount_vfs ($options, $vfstype, $device, $mountpoint);
681 This is the same as the C<$h-E<gt>mount> command, but it
682 allows you to set both the mount options and the vfstype
683 as for the L<mount(8)> I<-o> and I<-t> flags.
685 =item @devices = $h->mounts ();
687 This returns the list of currently mounted filesystems. It returns
688 the list of devices (eg. C</dev/sda1>, C</dev/VG/LV>).
690 Some internal mounts are not shown.
692 =item $h->pvcreate ($device);
694 This creates an LVM physical volume on the named C<device>,
695 where C<device> should usually be a partition name such
698 =item $h->pvremove ($device);
700 This wipes a physical volume C<device> so that LVM will no longer
703 The implementation uses the C<pvremove> command which refuses to
704 wipe physical volumes that contain any volume groups, so you have
705 to remove those first.
707 =item @physvols = $h->pvs ();
709 List all the physical volumes detected. This is the equivalent
710 of the L<pvs(8)> command.
712 This returns a list of just the device names that contain
713 PVs (eg. C</dev/sda2>).
715 See also C<$h-E<gt>pvs_full>.
717 =item @physvols = $h->pvs_full ();
719 List all the physical volumes detected. This is the equivalent
720 of the L<pvs(8)> command. The "full" version includes all fields.
722 =item @lines = $h->read_lines ($path);
724 Return the contents of the file named C<path>.
726 The file contents are returned as a list of lines. Trailing
727 C<LF> and C<CRLF> character sequences are I<not> returned.
729 Note that this function cannot correctly handle binary files
730 (specifically, files containing C<\0> character which is treated
731 as end of line). For those you need to use the C<$h-E<gt>read_file>
732 function which has a more complex interface.
734 =item $h->rm ($path);
736 Remove the single file C<path>.
738 =item $h->rm_rf ($path);
740 Remove the file or directory C<path>, recursively removing the
741 contents if its a directory. This is like the C<rm -rf> shell
744 =item $h->rmdir ($path);
746 Remove the single directory C<path>.
748 =item $h->set_autosync ($autosync);
750 If C<autosync> is true, this enables autosync. Libguestfs will make a
751 best effort attempt to run C<$h-E<gt>sync> when the handle is closed
752 (also if the program exits without closing handles).
754 =item $h->set_busy ();
756 This sets the state to C<BUSY>. This is only used when implementing
757 actions using the low-level API.
759 For more information on states, see L<guestfs(3)>.
761 =item $h->set_path ($path);
763 Set the path that libguestfs searches for kernel and initrd.img.
765 The default is C<$libdir/guestfs> unless overridden by setting
766 C<LIBGUESTFS_PATH> environment variable.
768 The string C<path> is stashed in the libguestfs handle, so the caller
769 must make sure it remains valid for the lifetime of the handle.
771 Setting C<path> to C<NULL> restores the default path.
773 =item $h->set_qemu ($qemu);
775 Set the qemu binary that we will use.
777 The default is chosen when the library was compiled by the
780 You can also override this by setting the C<LIBGUESTFS_QEMU>
781 environment variable.
783 The string C<qemu> is stashed in the libguestfs handle, so the caller
784 must make sure it remains valid for the lifetime of the handle.
786 Setting C<qemu> to C<NULL> restores the default qemu binary.
788 =item $h->set_ready ();
790 This sets the state to C<READY>. This is only used when implementing
791 actions using the low-level API.
793 For more information on states, see L<guestfs(3)>.
795 =item $h->set_verbose ($verbose);
797 If C<verbose> is true, this turns on verbose messages (to C<stderr>).
799 Verbose messages are disabled unless the environment variable
800 C<LIBGUESTFS_DEBUG> is defined and set to C<1>.
802 =item $h->sfdisk ($device, $cyls, $heads, $sectors, \@lines);
804 This is a direct interface to the L<sfdisk(8)> program for creating
805 partitions on block devices.
807 C<device> should be a block device, for example C</dev/sda>.
809 C<cyls>, C<heads> and C<sectors> are the number of cylinders, heads
810 and sectors on the device, which are passed directly to sfdisk as
811 the I<-C>, I<-H> and I<-S> parameters. If you pass C<0> for any
812 of these, then the corresponding parameter is omitted. Usually for
813 'large' disks, you can just pass C<0> for these, but for small
814 (floppy-sized) disks, sfdisk (or rather, the kernel) cannot work
815 out the right geometry and you will need to tell it.
817 C<lines> is a list of lines that we feed to C<sfdisk>. For more
818 information refer to the L<sfdisk(8)> manpage.
820 To create a single partition occupying the whole disk, you would
821 pass C<lines> as a single element list, when the single element being
822 the string C<,> (comma).
824 B<This command is dangerous. Without careful use you
825 can easily destroy all your data>.
827 =item %statbuf = $h->stat ($path);
829 Returns file information for the given C<path>.
831 This is the same as the C<stat(2)> system call.
833 =item %statbuf = $h->statvfs ($path);
835 Returns file system statistics for any mounted file system.
836 C<path> should be a file or directory in the mounted file system
837 (typically it is the mount point itself, but it doesn't need to be).
839 This is the same as the C<statvfs(2)> system call.
843 This syncs the disk, so that any writes are flushed through to the
844 underlying disk image.
846 You should always call this if you have modified a disk image, before
849 =item $h->tar_in ($tarfile, $directory);
851 This command uploads and unpacks local file C<tarfile> (an
852 I<uncompressed> tar file) into C<directory>.
854 To upload a compressed tarball, use C<$h-E<gt>tgz_in>.
856 =item $h->tar_out ($directory, $tarfile);
858 This command packs the contents of C<directory> and downloads
859 it to local file C<tarfile>.
861 To download a compressed tarball, use C<$h-E<gt>tgz_out>.
863 =item $h->tgz_in ($tarball, $directory);
865 This command uploads and unpacks local file C<tarball> (a
866 I<gzip compressed> tar file) into C<directory>.
868 To upload an uncompressed tarball, use C<$h-E<gt>tar_in>.
870 =item $h->tgz_out ($directory, $tarball);
872 This command packs the contents of C<directory> and downloads
873 it to local file C<tarball>.
875 To download an uncompressed tarball, use C<$h-E<gt>tar_out>.
877 =item $h->touch ($path);
879 Touch acts like the L<touch(1)> command. It can be used to
880 update the timestamps on a file, or, if the file does not exist,
881 to create a new zero-length file.
883 =item %superblock = $h->tune2fs_l ($device);
885 This returns the contents of the ext2, ext3 or ext4 filesystem
886 superblock on C<device>.
888 It is the same as running C<tune2fs -l device>. See L<tune2fs(8)>
889 manpage for more details. The list of fields returned isn't
890 clearly defined, and depends on both the version of C<tune2fs>
891 that libguestfs was built against, and the filesystem itself.
893 =item $h->umount ($pathordevice);
895 This unmounts the given filesystem. The filesystem may be
896 specified either by its mountpoint (path) or the device which
897 contains the filesystem.
899 =item $h->umount_all ();
901 This unmounts all mounted filesystems.
903 Some internal mounts are not unmounted by this call.
905 =item $h->upload ($filename, $remotefilename);
907 Upload local file C<filename> to C<remotefilename> on the
910 C<filename> can also be a named pipe.
912 See also C<$h-E<gt>download>.
914 =item $h->vgcreate ($volgroup, \@physvols);
916 This creates an LVM volume group called C<volgroup>
917 from the non-empty list of physical volumes C<physvols>.
919 =item $h->vgremove ($vgname);
921 Remove an LVM volume group C<vgname>, (for example C<VG>).
923 This also forcibly removes all logical volumes in the volume
926 =item @volgroups = $h->vgs ();
928 List all the volumes groups detected. This is the equivalent
929 of the L<vgs(8)> command.
931 This returns a list of just the volume group names that were
932 detected (eg. C<VolGroup00>).
934 See also C<$h-E<gt>vgs_full>.
936 =item @volgroups = $h->vgs_full ();
938 List all the volumes groups detected. This is the equivalent
939 of the L<vgs(8)> command. The "full" version includes all fields.
941 =item $h->wait_ready ();
943 Internally libguestfs is implemented by running a virtual machine
946 You should call this after C<$h-E<gt>launch> to wait for the launch
949 =item $h->write_file ($path, $content, $size);
951 This call creates a file called C<path>. The contents of the
952 file is the string C<content> (which can contain any 8 bit data),
955 As a special case, if C<size> is C<0>
956 then the length is calculated using C<strlen> (so in this case
957 the content cannot contain embedded ASCII NULs).
959 Because of the message protocol, there is a transfer limit
960 of somewhere between 2MB and 4MB. To transfer large files you should use
971 Copyright (C) 2009 Red Hat Inc.
975 Please see the file COPYING.LIB for the full license.
979 L<guestfs(3)>, L<guestfish(1)>.