[Libguestfs] [PATCH nbdkit v3 0/4] Add linuxdisk plugin.

[Richard W.M. Jones]

For v3 I reimplemented this using mke2fs -d.  This obviously makes the
implementation a whole lot simpler, but cannot support multiple
directory merging.

Patches 1-3 are the same as before.  I've also reproduced the notes
from v2 below.

v2:

 - Fix inconsistent tab/space.

 - All 3 plugins now contain a block of text pointing to the
   other 2 plugins.

 - TMDIR -> TMPDIR

 - Unlink the temporary file and other cleanups along error paths.

 - fclose -> pclose, and check the return value for errors.

I considered, but didn't yet fix, the latent bug in shell_quote.
Instead I added a comment.  Note there's a case where we probably
(arguably) should be using shell_quote on an argv[0] here:

https://github.com/libguestfs/nbdkit/blob/72e0afe2e280d895f68941677fafa559ddc3bb0d/plugins/iso/iso.c#L100

'du -c -k -s' works on FreeBSD which doesn't have GNU coreutils.
(However I agree it's not very natural to use this plugin with FreeBSD
at all.)

Rich.