This returns the ext2/3/4 filesystem UUID of the filesystem on
C<device>.
+=head2 get-memsize
+
+ get-memsize
+
+This gets the memory size in megabytes allocated to the
+qemu subprocess.
+
+If C<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)>.
+
=head2 get-path
get-path
See also: L<mkdtemp(3)>
+=head2 mkfifo
+
+ 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<mknod>.
+
=head2 mkfs
mkfs fstype device
or LVM logical volume). The filesystem type is C<fstype>, for
example C<ext3>.
+=head2 mknod
+
+ 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.
+
+=head2 mknod-b
+
+ 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<mknod>.
+
+=head2 mknod-c
+
+ 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<mknod>.
+
=head2 mkswap
mkswap device
You can use either C<tune2fs-l> or C<get-e2uuid>
to return the existing UUID of a filesystem.
+=head2 set-memsize | memsize
+
+ set-memsize memsize
+
+This sets the memory size in megabytes allocated to the
+qemu subprocess. This only has any effect if called before
+C<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)>.
+
=head2 set-path | path
set-path path
clearly defined, and depends on both the version of C<tune2fs>
that libguestfs was built against, and the filesystem itself.
+=head2 umask
+
+ 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<mknod>, C<mkdir>.
+
+This call returns the previous umask.
+
=head2 umount | unmount
umount pathordevice