[Libguestfs] [PATCH 0/4] libguestfs cannot open disk images which are symlinks to files that contain ':' (colon) character (RHBZ#812092).

[Richard W.M. Jones]

Note: This is a regression in RHEL 6.3.  Please review this patch
urgently.

The description of the bug is here:

  https://bugzilla.redhat.com/show_bug.cgi?id=812092

This patch set attempts to fix the problem conservatively, because
it's a very high risk codepath and very late in the development of
RHEL 6.3.

The first patch reverts the behaviour of calling realpath(3) and
checking for duplicate filenames.

The second patch fixes 'check_path'.  Only ':' is not permitted in
qemu paths.  (However symlinks to paths that contain ':' will work
again because the first patch was reverted.)

The third patch adds proper escaping of ',' in qemu command line
parameters.

The fourth patch adds a regression test for filenames containing
unusual characters.

Rich.