X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=perl%2Flib%2FSys%2FGuestfs.pm;h=083a0172cc341b1ef0484340208e4b50008a8d44;hp=8871b68ee9483596692d43a9ebd63a8c4831a470;hb=0884d8bbae6d76a603ec1385ada2938f88981c5c;hpb=f450ce75b754fb869b34433c0126f7bb592b141b

diff --git a/perl/lib/Sys/Guestfs.pm b/perl/lib/Sys/Guestfs.pm
index 8871b68..083a017 100644
--- a/perl/lib/Sys/Guestfs.pm
+++ b/perl/lib/Sys/Guestfs.pm
@@ -500,6 +500,23 @@ 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 $output = $h->df ();
+
+This command runs the C<df> command to report disk space used.
+
+This command is mostly useful for interactive sessions.  It
+is I<not> intended that you try to parse the output string.
+Use C<statvfs> from programs.
+
+=item $output = $h->df_h ();
+
+This command runs the C<df -h> command to report disk space used
+in human-readable format.
+
+This command is mostly useful for interactive sessions.  It
+is I<not> intended that you try to parse the output string.
+Use C<statvfs> from programs.
+
 =item $kmsgs = $h->dmesg ();
 
 This returns the kernel messages (C<dmesg> output) from
@@ -532,6 +549,18 @@ Setting C<whattodrop> to 3 should drop everything.
 This automatically calls L<sync(2)> before the operation,
 so that the maximum guest memory is freed.
 
+=item $sizekb = $h->du ($path);
+
+This command runs the C<du -s> command to estimate file space
+usage for C<path>.
+
+C<path> can be a file or a directory.  If C<path> is a directory
+then the estimate includes the contents of the directory and all
+subdirectories (recursively).
+
+The result is the estimated size in I<kilobytes>
+(ie. units of 1024 bytes).
+
 =item $h->e2fsck_f ($device);
 
 This runs C<e2fsck -p -f device>, ie. runs the ext2/ext3
@@ -651,6 +680,18 @@ C<device>.
 This returns the ext2/3/4 filesystem UUID of the filesystem on
 C<device>.
 
+=item $memsize = $h->get_memsize ();
+
+This gets the memory size in megabytes allocated to the
+qemu subprocess.
+
+If C<$h-E<gt>set_memsize> was not called
+on this handle, and if C<LIBGUESTFS_MEMSIZE> was not set,
+then this returns the compiled-in default value for memsize.
+
+For more information on the architecture of libguestfs,
+see L<guestfs(3)>.
+
 =item $path = $h->get_path ();
 
 Return the current search path.
@@ -694,6 +735,29 @@ See that manual page for more details.
 This command installs GRUB (the Grand Unified Bootloader) on
 C<device>, with the root directory being C<root>.
 
+=item @lines = $h->head ($path);
+
+This command returns up to the first 10 lines of a file as
+a list of strings.
+
+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 @lines = $h->head_n ($nrlines, $path);
+
+If the parameter C<nrlines> is a positive number, this returns the first
+C<nrlines> lines of the file C<path>.
+
+If the parameter C<nrlines> is a negative number, this returns lines
+from the file C<path>, excluding the last C<nrlines> lines.
+
+If the parameter C<nrlines> is zero, this returns an empty list.
+
+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 $dump = $h->hexdump ($path);
 
 This runs C<hexdump -C> on the given C<path>.  The result is
@@ -703,6 +767,18 @@ 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 @filenames = $h->initrd_list ($path);
+
+This command lists out files contained in an initrd.
+
+The files are listed without any initial C</> character.  The
+files are listed in the order they appear (not necessarily
+alphabetical).  Directory names are listed as separate items.
+
+Old Linux kernels (2.4 and earlier) used a compressed ext2
+filesystem as initrd.  We I<only> support the newer initramfs
+format (compressed cpio files).
+
 =item $busy = $h->is_busy ();
 
 This returns true iff this handle is busy processing a command
@@ -873,12 +949,52 @@ directory and its contents after use.
 
 See also: L<mkdtemp(3)>
 
+=item $h->mkfifo ($mode, $path);
+
+This call creates a FIFO (named pipe) called C<path> with
+mode C<mode>.  It is just a convenient wrapper around
+C<$h-E<gt>mknod>.
+
 =item $h->mkfs ($fstype, $device);
 
 This creates a filesystem on C<device> (usually a partition
 or LVM logical volume).  The filesystem type is C<fstype>, for
 example C<ext3>.
 
+=item $h->mknod ($mode, $devmajor, $devminor, $path);
+
+This call creates block or character special devices, or
+named pipes (FIFOs).
+
+The C<mode> parameter should be the mode, using the standard
+constants.  C<devmajor> and C<devminor> are the
+device major and minor numbers, only used when creating block
+and character special devices.
+
+=item $h->mknod_b ($mode, $devmajor, $devminor, $path);
+
+This call creates a block device node called C<path> with
+mode C<mode> and device major/minor C<devmajor> and C<devminor>.
+It is just a convenient wrapper around C<$h-E<gt>mknod>.
+
+=item $h->mknod_c ($mode, $devmajor, $devminor, $path);
+
+This call creates a char device node called C<path> with
+mode C<mode> and device major/minor C<devmajor> and C<devminor>.
+It is just a convenient wrapper around C<$h-E<gt>mknod>.
+
+=item $h->mkswap ($device);
+
+Create a swap partition on C<device>.
+
+=item $h->mkswap_L ($label, $device);
+
+Create a swap partition on C<device> with label C<label>.
+
+=item $h->mkswap_U ($uuid, $device);
+
+Create a swap partition on C<device> with UUID C<uuid>.
+
 =item $h->mount ($device, $mountpoint);
 
 Mount a guest disk at a position in the filesystem.  Block devices
@@ -898,6 +1014,12 @@ on the underlying device.
 The filesystem options C<sync> and C<noatime> are set with this
 call, in order to improve reliability.
 
+=item $h->mount_loop ($file, $mountpoint);
+
+This command lets you mount C<file> (a filesystem image
+in a file) on a mount point.  It is entirely equivalent to
+the command C<mount -o loop file mountpoint>.
+
 =item $h->mount_options ($options, $device, $mountpoint);
 
 This is the same as the C<$h-E<gt>mount> command, but it
@@ -1099,6 +1221,19 @@ L<tune2fs(8)> manpage.
 You can use either C<$h-E<gt>tune2fs_l> or C<$h-E<gt>get_e2uuid>
 to return the existing UUID of a filesystem.
 
+=item $h->set_memsize ($memsize);
+
+This sets the memory size in megabytes allocated to the
+qemu subprocess.  This only has any effect if called before
+C<$h-E<gt>launch>.
+
+You can also change this by setting the environment
+variable C<LIBGUESTFS_MEMSIZE> before the handle is
+created.
+
+For more information on the architecture of libguestfs,
+see L<guestfs(3)>.
+
 =item $h->set_path ($path);
 
 Set the path that libguestfs searches for kernel and initrd.img.
@@ -1161,7 +1296,7 @@ See also: C<$h-E<gt>sfdisk_l>, C<$h-E<gt>sfdisk_N>
 B<This command is dangerous.  Without careful use you
 can easily destroy all your data>.
 
-=item $h->sfdisk_N ($device, $n, $cyls, $heads, $sectors, $line);
+=item $h->sfdisk_N ($device, $partnum, $cyls, $heads, $sectors, $line);
 
 This runs L<sfdisk(8)> option to modify just the single
 partition C<n> (note: C<n> counts from 1).
@@ -1268,6 +1403,29 @@ underlying disk image.
 You should always call this if you have modified a disk image, before
 closing the handle.
 
+=item @lines = $h->tail ($path);
+
+This command returns up to the last 10 lines of a file as
+a list of strings.
+
+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 @lines = $h->tail_n ($nrlines, $path);
+
+If the parameter C<nrlines> is a positive number, this returns the last
+C<nrlines> lines of the file C<path>.
+
+If the parameter C<nrlines> is a negative number, this returns lines
+from the file C<path>, starting with the C<-nrlines>th line.
+
+If the parameter C<nrlines> is zero, this returns an empty list.
+
+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 $h->tar_in ($tarfile, $directory);
 
 This command uploads and unpacks local file C<tarfile> (an
@@ -1312,6 +1470,20 @@ 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 $oldmask = $h->umask ($mask);
+
+This function sets the mask used for creating new files and
+device nodes to C<mask & 0777>.
+
+Typical umask values would be C<022> which creates new files
+with permissions like "-rw-r--r--" or "-rwxr-xr-x", and
+C<002> which creates new files with permissions like
+"-rw-rw-r--" or "-rwxrwxr-x".
+
+See also L<umask(2)>, C<$h-E<gt>mknod>, C<$h-E<gt>mkdir>.
+
+This call returns the previous umask.
+
 =item $h->umount ($pathordevice);
 
 This unmounts the given filesystem.  The filesystem may be