X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=src%2Fguestfs.pod;h=3794023afcac27cda1a3e71a868d635eb36cf3e7;hb=11eeb8885c7a8ffb59e12cd5fb2ae0fc324df383;hp=8404e742948277b4cf17106e333081053c9178d3;hpb=3920ad95f6b2db8fbf20aa26692877a09070cb04;p=libguestfs.git

diff --git a/src/guestfs.pod b/src/guestfs.pod
index 8404e74..3794023 100644
--- a/src/guestfs.pod
+++ b/src/guestfs.pod
@@ -258,7 +258,11 @@ L</guestfs_tgz_out>.
 It's often the case that you want to write a file or files to the disk
 image.
 
-For small, single files, use L</guestfs_write>.
+To write a small file with fixed content, use L</guestfs_write>.  To
+create a file of all zeroes, use L</guestfs_truncate_size> (sparse) or
+L</guestfs_fallocate64> (with all disk blocks allocated).  There are a
+variety of other functions for creating test files, for example
+L</guestfs_fill> and L</guestfs_fill_pattern>.
 
 To upload a single file, use L</guestfs_upload>.  This call has no
 limits on file content or size (even files larger than 4 GB).
@@ -801,6 +805,13 @@ supports the functionality.
 
 @AVAILABILITY@
 
+=head2 GUESTFISH supported COMMAND
+
+In L<guestfish(3)> there is a handy interactive command
+C<supported> which prints out the available groups and
+whether they are supported by this build of libguestfs.
+Note however that you have to do C<run> first.
+
 =head2 SINGLE CALLS AT COMPILE TIME
 
 If you need to test whether a single libguestfs function is