[wdiff-bugs] no suitable temporary directory

[Karl Berry]

Hi Martin and all,

With wdiff 0.5.94, if I set the TMPDIR envvar to /dev/shm, I get:
wdiff: no suitable temporary directory exists

(A more specific error message would be nice, about what directory/ies
were tried and what the actual problem is.)

With TMPDIR set to /tmp (for example) or unset completely, it works fine.

The permissions are:

drwxrwxrwt   7 root root  180 Jan 26 10:14 /dev/shm
drwxrwxrwt. 22 root root 4096 Jan 26 10:11 /tmp

Perhaps it's because /tmp has the selinux context
system_u:object_r:tmp_t:s0 (the "." above), but I have selinux disabled,
so I don't see why it should matter.  And sort from current coreutils
(8.4) (for example) does not complain with TMPDIR=/dev/shm, which I
expect it would if it was a generic problem.

Wdyt?

Thanks,
Karl