X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=perl%2Flib%2FSys%2FGuestfs.pm;h=bab788791be2136bfae6cc677fdb1809322e92f1;hp=50f5d750c79ec3447d3aa5ff7a0ab199da0ce584;hb=36f9dac1a2530b575dab9226f6ddd85e6e8c8590;hpb=286841877f4223d67ec00b83e5a2aabfbb9e19ed

diff --git a/perl/lib/Sys/Guestfs.pm b/perl/lib/Sys/Guestfs.pm
index 50f5d75..bab7887 100644
--- a/perl/lib/Sys/Guestfs.pm
+++ b/perl/lib/Sys/Guestfs.pm
@@ -91,13 +91,13 @@ sub new {
   return $self;
 }
 
-=item $h->add_cdrom (filename);
+=item $h->add_cdrom ($filename);
 
 This function adds a virtual CD-ROM disk image to the guest.
 
 This is equivalent to the qemu parameter C<-cdrom filename>.
 
-=item $h->add_drive (filename);
+=item $h->add_drive ($filename);
 
 This function adds a virtual machine disk image C<filename> to the
 guest.  The first time you call this function, the disk appears as IDE
@@ -119,7 +119,7 @@ used by it.  After calling this, you have to call
 C<$h-E<gt>aug_init> again before you can use any other
 Augeas functions.
 
-=item ($nrnodes, $created) = $h->aug_defnode (name, expr, val);
+=item ($nrnodes, $created) = $h->aug_defnode ($name, $expr, $val);
 
 Defines a variable C<name> whose value is the result of
 evaluating C<expr>.
@@ -132,7 +132,7 @@ On success this returns a pair containing the
 number of nodes in the nodeset, and a boolean flag
 if a node was created.
 
-=item $nrnodes = $h->aug_defvar (name, expr);
+=item $nrnodes = $h->aug_defvar ($name, $expr);
 
 Defines an Augeas variable C<name> whose value is the result
 of evaluating C<expr>.  If C<expr> is NULL, then C<name> is
@@ -141,12 +141,12 @@ undefined.
 On success this returns the number of nodes in C<expr>, or
 C<0> if C<expr> evaluates to something which is not a nodeset.
 
-=item $val = $h->aug_get (path);
+=item $val = $h->aug_get ($path);
 
 Look up the value associated with C<path>.  If C<path>
 matches exactly one node, the C<value> is returned.
 
-=item $h->aug_init (root, flags);
+=item $h->aug_init ($root, $flags);
 
 Create a new Augeas handle for editing configuration files.
 If there was any previous Augeas handle associated with this
@@ -195,7 +195,7 @@ To close the handle, you can call C<$h-E<gt>aug_close>.
 
 To find out more about Augeas, see L<http://augeas.net/>.
 
-=item $h->aug_insert (path, label, before);
+=item $h->aug_insert ($path, $label, $before);
 
 Create a new sibling C<label> for C<path>, inserting it into
 the tree before or after C<path> (depending on the boolean
@@ -212,23 +212,23 @@ Load files into the tree.
 See C<aug_load> in the Augeas documentation for the full gory
 details.
 
-=item @matches = $h->aug_ls (path);
+=item @matches = $h->aug_ls ($path);
 
 This is just a shortcut for listing C<$h-E<gt>aug_match>
 C<path/*> and sorting the resulting nodes into alphabetical order.
 
-=item @matches = $h->aug_match (path);
+=item @matches = $h->aug_match ($path);
 
 Returns a list of paths which match the path expression C<path>.
 The returned paths are sufficiently qualified so that they match
 exactly one node in the current tree.
 
-=item $h->aug_mv (src, dest);
+=item $h->aug_mv ($src, $dest);
 
 Move the node C<src> to C<dest>.  C<src> must match exactly
 one node.  C<dest> is overwritten if it exists.
 
-=item $nrnodes = $h->aug_rm (path);
+=item $nrnodes = $h->aug_rm ($path);
 
 Remove C<path> and all of its children.
 
@@ -241,29 +241,151 @@ This writes all pending changes to disk.
 The flags which were passed to C<$h-E<gt>aug_init> affect exactly
 how files are saved.
 
-=item $h->aug_set (path, val);
+=item $h->aug_set ($path, $val);
 
 Set the value associated with C<path> to C<value>.
 
-=item $content = $h->cat (path);
+=item $h->blockdev_flushbufs ($device);
+
+This tells the kernel to flush internal buffers associated
+with C<device>.
+
+This uses the L<blockdev(8)> command.
+
+=item $blocksize = $h->blockdev_getbsz ($device);
+
+This returns the block size of a device.
+
+(Note this is different from both I<size in blocks> and
+I<filesystem block size>).
+
+This uses the L<blockdev(8)> command.
+
+=item $ro = $h->blockdev_getro ($device);
+
+Returns a boolean indicating if the block device is read-only
+(true if read-only, false if not).
+
+This uses the L<blockdev(8)> command.
+
+=item $sizeinbytes = $h->blockdev_getsize64 ($device);
+
+This returns the size of the device in bytes.
+
+See also C<$h-E<gt>blockdev_getsz>.
+
+This uses the L<blockdev(8)> command.
+
+=item $sectorsize = $h->blockdev_getss ($device);
+
+This returns the size of sectors on a block device.
+Usually 512, but can be larger for modern devices.
+
+(Note, this is not the size in sectors, use C<$h-E<gt>blockdev_getsz>
+for that).
+
+This uses the L<blockdev(8)> command.
+
+=item $sizeinsectors = $h->blockdev_getsz ($device);
+
+This returns the size of the device in units of 512-byte sectors
+(even if the sectorsize isn't 512 bytes ... weird).
+
+See also C<$h-E<gt>blockdev_getss> for the real sector size of
+the device, and C<$h-E<gt>blockdev_getsize64> for the more
+useful I<size in bytes>.
+
+This uses the L<blockdev(8)> command.
+
+=item $h->blockdev_rereadpt ($device);
+
+Reread the partition table on C<device>.
+
+This uses the L<blockdev(8)> command.
+
+=item $h->blockdev_setbsz ($device, $blocksize);
+
+This sets the block size of a device.
+
+(Note this is different from both I<size in blocks> and
+I<filesystem block size>).
+
+This uses the L<blockdev(8)> command.
+
+=item $h->blockdev_setro ($device);
+
+Sets the block device named C<device> to read-only.
+
+This uses the L<blockdev(8)> command.
+
+=item $h->blockdev_setrw ($device);
+
+Sets the block device named C<device> to read-write.
+
+This uses the L<blockdev(8)> command.
+
+=item $content = $h->cat ($path);
 
 Return the contents of the file named C<path>.
 
 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<$h-E<gt>read_file>
+as end of string).  For those you need to use the C<$h-E<gt>download>
 function which has a more complex interface.
 
 Because of the message protocol, there is a transfer limit 
 of somewhere between 2MB and 4MB.  To transfer large files you should use
 FTP.
 
-=item $h->chmod (mode, path);
+=item $checksum = $h->checksum ($csumtype, $path);
+
+This call computes the MD5, SHAx or CRC checksum of the
+file named C<path>.
+
+The type of checksum to compute is given by the C<csumtype>
+parameter which must have one of the following values:
+
+=over 4
+
+=item C<crc>
+
+Compute the cyclic redundancy check (CRC) specified by POSIX
+for the C<cksum> command.
+
+=item C<md5>
+
+Compute the MD5 hash (using the C<md5sum> program).
+
+=item C<sha1>
+
+Compute the SHA1 hash (using the C<sha1sum> program).
+
+=item C<sha224>
+
+Compute the SHA224 hash (using the C<sha224sum> program).
+
+=item C<sha256>
+
+Compute the SHA256 hash (using the C<sha256sum> program).
+
+=item C<sha384>
+
+Compute the SHA384 hash (using the C<sha384sum> program).
+
+=item C<sha512>
+
+Compute the SHA512 hash (using the C<sha512sum> program).
+
+=back
+
+The checksum is returned as a printable string.
+
+=item $h->chmod ($mode, $path);
 
 Change the mode (permissions) of C<path> to C<mode>.  Only
 numeric modes are supported.
 
-=item $h->chown (owner, group, path);
+=item $h->chown ($owner, $group, $path);
 
 Change the file owner to C<owner> and group to C<group>.
 
@@ -271,7 +393,35 @@ Only numeric uid and gid are supported.  If you want to use
 names, you will need to locate and parse the password file
 yourself (Augeas support makes this relatively easy).
 
-=item $h->config (qemuparam, qemuvalue);
+=item $output = $h->command (\@arguments);
+
+This call runs a command from the guest filesystem.  The
+filesystem must be mounted, and must contain a compatible
+operating system (ie. something Linux, with the same
+or compatible processor architecture).
+
+The single parameter is an argv-style list of arguments.
+The first element is the name of the program to run.
+Subsequent elements are parameters.  The list must be
+non-empty (ie. must contain a program name).
+
+The C<$PATH> environment variable will contain at least
+C</usr/bin> and C</bin>.  If you require a program from
+another location, you should provide the full path in the
+first parameter.
+
+Shared libraries and data files required by the program
+must be available on filesystems which are mounted in the
+correct places.  It is the caller's responsibility to ensure
+all filesystems that are needed are mounted at the right
+locations.
+
+=item @lines = $h->command_lines (\@arguments);
+
+This is the same as C<$h-E<gt>command>, but splits the
+result into a list of lines.
+
+=item $h->config ($qemuparam, $qemuvalue);
 
 This can be used to add arbitrary qemu command line parameters
 of the form C<-param value>.  Actually it's not quite arbitrary - we
@@ -282,10 +432,86 @@ The first character of C<param> string must be a C<-> (dash).
 
 C<value> can be NULL.
 
+=item $result = $h->debug ($subcmd, \@extraargs);
+
+The C<$h-E<gt>debug> command exposes some internals of
+C<guestfsd> (the guestfs daemon) that runs inside the
+qemu subprocess.
+
+There is no comprehensive help for this command.  You have
+to look at the file C<daemon/debug.c> in the libguestfs source
+to find out what you can do.
+
+=item $h->download ($remotefilename, $filename);
+
+Download file C<remotefilename> and save it as C<filename>
+on the local machine.
+
+C<filename> can also be a named pipe.
+
+See also C<$h-E<gt>upload>, C<$h-E<gt>cat>.
+
+=item $existsflag = $h->exists ($path);
+
+This returns C<true> if and only if there is a file, directory
+(or anything) with the given C<path> name.
+
+See also C<$h-E<gt>is_file>, C<$h-E<gt>is_dir>, C<$h-E<gt>stat>.
+
+=item $description = $h->file ($path);
+
+This call uses the standard L<file(1)> command to determine
+the type or contents of the file.  This also works on devices,
+for example to find out whether a partition contains a filesystem.
+
+The exact command which runs is C<file -bsL path>.  Note in
+particular that the filename is not prepended to the output
+(the C<-b> option).
+
+=item $status = $h->fsck ($fstype, $device);
+
+This runs the filesystem checker (fsck) on C<device> which
+should have filesystem type C<fstype>.
+
+The returned integer is the status.  See L<fsck(8)> for the
+list of status codes from C<fsck>.
+
+Notes:
+
+=over 4
+
+=item *
+
+Multiple status codes can be summed together.
+
+=item *
+
+A non-zero return code can mean "success", for example if
+errors have been corrected on the filesystem.
+
+=item *
+
+Checking or repairing NTFS volumes is not supported
+(by linux-ntfs).
+
+=back
+
+This command is entirely equivalent to running C<fsck -a -t fstype device>.
+
 =item $autosync = $h->get_autosync ();
 
 Get the autosync flag.
 
+=item $label = $h->get_e2label ($device);
+
+This returns the ext2/3/4 filesystem label of the filesystem on
+C<device>.
+
+=item $uuid = $h->get_e2uuid ($device);
+
+This returns the ext2/3/4 filesystem UUID of the filesystem on
+C<device>.
+
 =item $path = $h->get_path ();
 
 Return the current search path.
@@ -293,10 +519,68 @@ Return the current search path.
 This is always non-NULL.  If it wasn't set already, then this will
 return the default path.
 
+=item $qemu = $h->get_qemu ();
+
+Return the current qemu binary.
+
+This is always non-NULL.  If it wasn't set already, then this will
+return the default qemu binary name.
+
+=item $state = $h->get_state ();
+
+This returns the current state as an opaque integer.  This is
+only useful for printing debug and internal error messages.
+
+For more information on states, see L<guestfs(3)>.
+
 =item $verbose = $h->get_verbose ();
 
 This returns the verbose messages flag.
 
+=item $busy = $h->is_busy ();
+
+This returns true iff this handle is busy processing a command
+(in the C<BUSY> state).
+
+For more information on states, see L<guestfs(3)>.
+
+=item $config = $h->is_config ();
+
+This returns true iff this handle is being configured
+(in the C<CONFIG> state).
+
+For more information on states, see L<guestfs(3)>.
+
+=item $dirflag = $h->is_dir ($path);
+
+This returns C<true> if and only if there is a directory
+with the given C<path> name.  Note that it returns false for
+other objects like files.
+
+See also C<$h-E<gt>stat>.
+
+=item $fileflag = $h->is_file ($path);
+
+This returns C<true> if and only if there is a file
+with the given C<path> name.  Note that it returns false for
+other objects like directories.
+
+See also C<$h-E<gt>stat>.
+
+=item $launching = $h->is_launching ();
+
+This returns true iff this handle is launching the subprocess
+(in the C<LAUNCHING> state).
+
+For more information on states, see L<guestfs(3)>.
+
+=item $ready = $h->is_ready ();
+
+This returns true iff this handle is ready to accept commands
+(in the C<READY> state).
+
+For more information on states, see L<guestfs(3)>.
+
 =item $h->kill_subprocess ();
 
 This kills the qemu subprocess.  You should never need to call this.
@@ -324,7 +608,7 @@ The full partition device names are returned, eg. C</dev/sda1>
 This does not return logical volumes.  For that you will need to
 call C<$h-E<gt>lvs>.
 
-=item $listing = $h->ll (directory);
+=item $listing = $h->ll ($directory);
 
 List the files in C<directory> (relative to the root directory,
 there is no cwd) in the format of 'ls -la'.
@@ -332,7 +616,7 @@ there is no cwd) in the format of 'ls -la'.
 This command is mostly useful for interactive sessions.  It
 is I<not> intended that you try to parse the output string.
 
-=item @listing = $h->ls (directory);
+=item @listing = $h->ls ($directory);
 
 List the files in C<directory> (relative to the root directory,
 there is no cwd).  The '.' and '..' entries are not returned, but
@@ -341,6 +625,37 @@ hidden files are shown.
 This command is mostly useful for interactive sessions.  Programs
 should probably use C<$h-E<gt>readdir> instead.
 
+=item %statbuf = $h->lstat ($path);
+
+Returns file information for the given C<path>.
+
+This is the same as C<$h-E<gt>stat> except that if C<path>
+is a symbolic link, then the link is stat-ed, not the file it
+refers to.
+
+This is the same as the C<lstat(2)> system call.
+
+=item $h->lvcreate ($logvol, $volgroup, $mbytes);
+
+This creates an LVM volume group called C<logvol>
+on the volume group C<volgroup>, with C<size> megabytes.
+
+=item $h->lvm_remove_all ();
+
+This command removes all LVM logical volumes, volume groups
+and physical volumes.
+
+B<This command is dangerous.  Without careful use you
+can easily destroy all your data>.
+
+=item $h->lvremove ($device);
+
+Remove an LVM logical volume C<device>, where C<device> is
+the path to the LV, such as C</dev/VG/LV>.
+
+You can also remove all LVs in a volume group by specifying
+the VG name, C</dev/VG>.
+
 =item @logvols = $h->lvs ();
 
 List all the logical volumes detected.  This is the equivalent
@@ -356,16 +671,22 @@ See also C<$h-E<gt>lvs_full>.
 List all the logical volumes detected.  This is the equivalent
 of the L<lvs(8)> command.  The "full" version includes all fields.
 
-=item $h->mkdir (path);
+=item $h->mkdir ($path);
 
 Create a directory named C<path>.
 
-=item $h->mkdir_p (path);
+=item $h->mkdir_p ($path);
 
 Create a directory named C<path>, creating any parent directories
 as necessary.  This is like the C<mkdir -p> shell command.
 
-=item $h->mount (device, mountpoint);
+=item $h->mkfs ($fstype, $device);
+
+This creates a filesystem on C<device> (usually a partition
+of LVM logical volume).  The filesystem type is C<fstype>, for
+example C<ext3>.
+
+=item $h->mount ($device, $mountpoint);
 
 Mount a guest disk at a position in the filesystem.  Block devices
 are named C</dev/sda>, C</dev/sdb> and so on, as they were added to
@@ -384,6 +705,45 @@ on the underlying device.
 The filesystem options C<sync> and C<noatime> are set with this
 call, in order to improve reliability.
 
+=item $h->mount_options ($options, $device, $mountpoint);
+
+This is the same as the C<$h-E<gt>mount> command, but it
+allows you to set the mount options as for the
+L<mount(8)> I<-o> flag.
+
+=item $h->mount_ro ($device, $mountpoint);
+
+This is the same as the C<$h-E<gt>mount> command, but it
+mounts the filesystem with the read-only (I<-o ro>) flag.
+
+=item $h->mount_vfs ($options, $vfstype, $device, $mountpoint);
+
+This is the same as the C<$h-E<gt>mount> command, but it
+allows you to set both the mount options and the vfstype
+as for the L<mount(8)> I<-o> and I<-t> flags.
+
+=item @devices = $h->mounts ();
+
+This returns the list of currently mounted filesystems.  It returns
+the list of devices (eg. C</dev/sda1>, C</dev/VG/LV>).
+
+Some internal mounts are not shown.
+
+=item $h->pvcreate ($device);
+
+This creates an LVM physical volume on the named C<device>,
+where C<device> should usually be a partition name such
+as C</dev/sda1>.
+
+=item $h->pvremove ($device);
+
+This wipes a physical volume C<device> so that LVM will no longer
+recognise it.
+
+The implementation uses the C<pvremove> command which refuses to
+wipe physical volumes that contain any volume groups, so you have
+to remove those first.
+
 =item @physvols = $h->pvs ();
 
 List all the physical volumes detected.  This is the equivalent
@@ -399,7 +759,7 @@ See also C<$h-E<gt>pvs_full>.
 List all the physical volumes detected.  This is the equivalent
 of the L<pvs(8)> command.  The "full" version includes all fields.
 
-=item @lines = $h->read_lines (path);
+=item @lines = $h->read_lines ($path);
 
 Return the contents of the file named C<path>.
 
@@ -411,27 +771,57 @@ Note that this function cannot correctly handle binary files
 as end of line).  For those you need to use the C<$h-E<gt>read_file>
 function which has a more complex interface.
 
-=item $h->rm (path);
+=item $h->rm ($path);
 
 Remove the single file C<path>.
 
-=item $h->rm_rf (path);
+=item $h->rm_rf ($path);
 
 Remove the file or directory C<path>, recursively removing the
 contents if its a directory.  This is like the C<rm -rf> shell
 command.
 
-=item $h->rmdir (path);
+=item $h->rmdir ($path);
 
 Remove the single directory C<path>.
 
-=item $h->set_autosync (autosync);
+=item $h->set_autosync ($autosync);
 
 If C<autosync> is true, this enables autosync.  Libguestfs will make a
-best effort attempt to run C<$h-E<gt>sync> when the handle is closed
+best effort attempt to run C<$h-E<gt>umount_all> followed by
+C<$h-E<gt>sync> when the handle is closed
 (also if the program exits without closing handles).
 
-=item $h->set_path (path);
+This is disabled by default (except in guestfish where it is
+enabled by default).
+
+=item $h->set_busy ();
+
+This sets the state to C<BUSY>.  This is only used when implementing
+actions using the low-level API.
+
+For more information on states, see L<guestfs(3)>.
+
+=item $h->set_e2label ($device, $label);
+
+This sets the ext2/3/4 filesystem label of the filesystem on
+C<device> to C<label>.  Filesystem labels are limited to
+16 characters.
+
+You can use either C<$h-E<gt>tune2fs_l> or C<$h-E<gt>get_e2label>
+to return the existing label on a filesystem.
+
+=item $h->set_e2uuid ($device, $uuid);
+
+This sets the ext2/3/4 filesystem UUID of the filesystem on
+C<device> to C<uuid>.  The format of the UUID and alternatives
+such as C<clear>, C<random> and C<time> are described in the
+L<tune2fs(8)> manpage.
+
+You can use either C<$h-E<gt>tune2fs_l> or C<$h-E<gt>get_e2uuid>
+to return the existing UUID of a filesystem.
+
+=item $h->set_path ($path);
 
 Set the path that libguestfs searches for kernel and initrd.img.
 
@@ -443,13 +833,74 @@ must make sure it remains valid for the lifetime of the handle.
 
 Setting C<path> to C<NULL> restores the default path.
 
-=item $h->set_verbose (verbose);
+=item $h->set_qemu ($qemu);
+
+Set the qemu binary that we will use.
+
+The default is chosen when the library was compiled by the
+configure script.
+
+You can also override this by setting the C<LIBGUESTFS_QEMU>
+environment variable.
+
+The string C<qemu> is stashed in the libguestfs handle, so the caller
+must make sure it remains valid for the lifetime of the handle.
+
+Setting C<qemu> to C<NULL> restores the default qemu binary.
+
+=item $h->set_ready ();
+
+This sets the state to C<READY>.  This is only used when implementing
+actions using the low-level API.
+
+For more information on states, see L<guestfs(3)>.
+
+=item $h->set_verbose ($verbose);
 
 If C<verbose> is true, this turns on verbose messages (to C<stderr>).
 
 Verbose messages are disabled unless the environment variable
 C<LIBGUESTFS_DEBUG> is defined and set to C<1>.
 
+=item $h->sfdisk ($device, $cyls, $heads, $sectors, \@lines);
+
+This is a direct interface to the L<sfdisk(8)> program for creating
+partitions on block devices.
+
+C<device> should be a block device, for example C</dev/sda>.
+
+C<cyls>, C<heads> and C<sectors> are the number of cylinders, heads
+and sectors on the device, which are passed directly to sfdisk as
+the I<-C>, I<-H> and I<-S> parameters.  If you pass C<0> for any
+of these, then the corresponding parameter is omitted.  Usually for
+'large' disks, you can just pass C<0> for these, but for small
+(floppy-sized) disks, sfdisk (or rather, the kernel) cannot work
+out the right geometry and you will need to tell it.
+
+C<lines> is a list of lines that we feed to C<sfdisk>.  For more
+information refer to the L<sfdisk(8)> manpage.
+
+To create a single partition occupying the whole disk, you would
+pass C<lines> as a single element list, when the single element being
+the string C<,> (comma).
+
+B<This command is dangerous.  Without careful use you
+can easily destroy all your data>.
+
+=item %statbuf = $h->stat ($path);
+
+Returns file information for the given C<path>.
+
+This is the same as the C<stat(2)> system call.
+
+=item %statbuf = $h->statvfs ($path);
+
+Returns file system statistics for any mounted file system.
+C<path> should be a file or directory in the mounted file system
+(typically it is the mount point itself, but it doesn't need to be).
+
+This is the same as the C<statvfs(2)> system call.
+
 =item $h->sync ();
 
 This syncs the disk, so that any writes are flushed through to the
@@ -458,12 +909,83 @@ underlying disk image.
 You should always call this if you have modified a disk image, before
 closing the handle.
 
-=item $h->touch (path);
+=item $h->tar_in ($tarfile, $directory);
+
+This command uploads and unpacks local file C<tarfile> (an
+I<uncompressed> tar file) into C<directory>.
+
+To upload a compressed tarball, use C<$h-E<gt>tgz_in>.
+
+=item $h->tar_out ($directory, $tarfile);
+
+This command packs the contents of C<directory> and downloads
+it to local file C<tarfile>.
+
+To download a compressed tarball, use C<$h-E<gt>tgz_out>.
+
+=item $h->tgz_in ($tarball, $directory);
+
+This command uploads and unpacks local file C<tarball> (a
+I<gzip compressed> tar file) into C<directory>.
+
+To upload an uncompressed tarball, use C<$h-E<gt>tar_in>.
+
+=item $h->tgz_out ($directory, $tarball);
+
+This command packs the contents of C<directory> and downloads
+it to local file C<tarball>.
+
+To download an uncompressed tarball, use C<$h-E<gt>tar_out>.
+
+=item $h->touch ($path);
 
 Touch acts like the L<touch(1)> command.  It can be used to
 update the timestamps on a file, or, if the file does not exist,
 to create a new zero-length file.
 
+=item %superblock = $h->tune2fs_l ($device);
+
+This returns the contents of the ext2, ext3 or ext4 filesystem
+superblock on C<device>.
+
+It is the same as running C<tune2fs -l device>.  See L<tune2fs(8)>
+manpage for more details.  The list of fields returned isn't
+clearly defined, and depends on both the version of C<tune2fs>
+that libguestfs was built against, and the filesystem itself.
+
+=item $h->umount ($pathordevice);
+
+This unmounts the given filesystem.  The filesystem may be
+specified either by its mountpoint (path) or the device which
+contains the filesystem.
+
+=item $h->umount_all ();
+
+This unmounts all mounted filesystems.
+
+Some internal mounts are not unmounted by this call.
+
+=item $h->upload ($filename, $remotefilename);
+
+Upload local file C<filename> to C<remotefilename> on the
+filesystem.
+
+C<filename> can also be a named pipe.
+
+See also C<$h-E<gt>download>.
+
+=item $h->vgcreate ($volgroup, \@physvols);
+
+This creates an LVM volume group called C<volgroup>
+from the non-empty list of physical volumes C<physvols>.
+
+=item $h->vgremove ($vgname);
+
+Remove an LVM volume group C<vgname>, (for example C<VG>).
+
+This also forcibly removes all logical volumes in the volume
+group (if any).
+
 =item @volgroups = $h->vgs ();
 
 List all the volumes groups detected.  This is the equivalent
@@ -487,6 +1009,28 @@ using L<qemu(1)>.
 You should call this after C<$h-E<gt>launch> to wait for the launch
 to complete.
 
+=item $h->write_file ($path, $content, $size);
+
+This call creates a file called C<path>.  The contents of the
+file is the string C<content> (which can contain any 8 bit data),
+with length C<size>.
+
+As a special case, if C<size> is C<0>
+then the length is calculated using C<strlen> (so in this case
+the content cannot contain embedded ASCII NULs).
+
+Because of the message protocol, there is a transfer limit 
+of somewhere between 2MB and 4MB.  To transfer large files you should use
+FTP.
+
+=item $h->zero ($device);
+
+This command writes zeroes over the first few blocks of C<device>.
+
+How many blocks are zeroed isn't specified (but it's I<not> enough
+to securely wipe the device).  It should be sufficient to remove
+any partition tables, filesystem superblocks and so on.
+
 =cut
 
 1;