Version 1.8.12.

[libguestfs.git] / generator / generator_actions.ml

diff --git a/generator/generator_actions.ml b/generator/generator_actions.ml
index 5c6ce21..bbafcdf 100644 (file)
--- a/generator/generator_actions.ml
+++ b/generator/generator_actions.ml
@@ -907,6 +907,10 @@ This returns a hash of where we think the filesystems
 associated with this operating system should be mounted.
 Callers should note that this is at best an educated guess
 made by reading configuration files such as C</etc/fstab>.
+I<In particular note> that this may return filesystems
+which are non-existent or not mountable and callers should
+be prepared to handle or ignore failures if they try to
+mount them.
 
 Each element in the returned hashtable has a key which
 is the path of the mountpoint (eg. C</boot>) and a value
@@ -1565,7 +1569,12 @@ do not overwrite original.  Overrides C<AUG_SAVE_BACKUP>.
 
 =item C<AUG_TYPE_CHECK> = 4
 
-Typecheck lenses (can be expensive).
+Typecheck lenses.
+
+This option is only useful when debugging Augeas lenses.  Use
+of this option may require additional memory for the libguestfs
+appliance.  You may need to set the C<LIBGUESTFS_MEMSIZE>
+environment variable or call C<guestfs_set_memsize>.
 
 =item C<AUG_NO_STDINC> = 8
 
@@ -2035,15 +2044,12 @@ The exact command which runs is C<file -zb path>.  Note in
 particular that the filename is not prepended to the output
 (the C<-b> option).
 
-This command can also be used on C</dev/> devices
-(and partitions, LV names).  You can for example use this
-to determine if a device contains a filesystem, although
-it's usually better to use C<guestfs_vfs_type>.
+The output depends on the output of the underlying L<file(1)>
+command and it can change in future in ways beyond our control.
+In other words, the output is not guaranteed by the ABI.
 
-If the C<path> does not begin with C</dev/> then
-this command only works for the content of regular files.
-For other file types (directory, symbolic link etc) it
-will just return the string C<directory> etc.");
+See also: L<file(1)>, C<guestfs_vfs_type>, C<guestfs_lstat>,
+C<guestfs_is_file>, C<guestfs_is_blockdev> (etc).");
 
   ("command", (RString "output", [StringList "arguments"], []), 50, [ProtocolLimitWarning],
    [InitScratchFS, Always, TestOutput (
@@ -2737,10 +2743,9 @@ Checking or repairing NTFS volumes is not supported
 This command is entirely equivalent to running C<fsck -a -t fstype device>.");
 
   ("zero", (RErr, [Device "device"], []), 85, [Progress],
-   [InitBasicFS, Always, TestOutput (
+   [InitBasicFS, Always, TestRun (
       [["umount"; "/dev/sda1"];
-       ["zero"; "/dev/sda1"];
-       ["file"; "/dev/sda1"]], "data")],
+       ["zero"; "/dev/sda1"]])],
    "write zeroes to the device",
    "\
 This command writes zeroes over the first few blocks of C<device>.
@@ -4996,6 +5001,15 @@ it to local file C<tarball> (as an xz compressed tar archive).");
    "\
 This command resizes an NTFS filesystem, expanding or
 shrinking it to the size of the underlying device.
+
+I<Note:> After the resize operation, the filesystem is marked
+as requiring a consistency check (for safety).  You have to boot
+into Windows to perform this check and clear this condition.
+Furthermore, ntfsresize refuses to resize filesystems
+which have been marked in this way.  So in effect it is
+not possible to call ntfsresize multiple times on a single
+filesystem without booting into Windows between each resize.
+
 See also L<ntfsresize(8)>.");
 
   ("vgscan", (RErr, [], []), 232, [],
@@ -5629,6 +5643,8 @@ for Linux ext2/3 filesystems.
 For VFAT and NTFS the C<blocksize> parameter is treated as
 the requested cluster size.
 
+For UFS block sizes, please see L<mkfs.ufs(8)>.
+
 =back");
 
   ("getxattr", (RBufferOut "xattr", [Pathname "path"; String "name"], []), 279, [Optional "linuxxattrs"],