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From: Eric Blake <ebb9 AT byu DOT net>
Subject:  Re: bash.exe: warning: could not find /tmp, please create!
Date: Wed, 13 Dec 2006 16:30:11 +0000 (UTC)
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Kenneth Nellis <knellis <at> syntek-usa.com> writes:

> 
> I'm curious if Eric intends to reference /tmp directly, as opposed to
> recognizing environment variable TMPDIR, if defined?

Indeed, it appears that there may be an upstream bash bug - 'man bash' claims 
that $TMPDIR is honored, but in reality, it is only honored in the fc builtin 
(here-docs do not use it; and if cygwin did not support /proc/self/fd, the 
fallback of named pipes does not use it either; there were no other instances 
of tmp files created by bash).  Yes, I intend for that to be part of my fix.

If the use of TMPDIR by here-docs is not fixed, bash prefers P_tmpdir (which on 
cygwin is defined as "/tmp"), then "/tmp", then "/var/tmp", then "/usr/tmp", 
then "."; if it gets all the way through the list and has not found an 
existing, writable directory, that is when it fails.  But since that failure 
point is rather late in the game, I can see why the previous cygwin-specific 
hack of checking for the existence of "/tmp" as part of bash initialization was 
done.

Oh, and I just found a bash bug - if you make TMPDIR longer than PATH_MAX, the 
heap gets corrupted.

-- 
Eric Blake



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