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Date:	Wed, 30 Nov 2011 16:17:34 -0600 (CST)
From:	Tim McDaniel <tmcd AT panix DOT com>
To:	cygwin AT cygwin DOT com
Subject:	ash is wrong about [ -w Temp ], so rebaseall fails
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Windows 7, 64-bit, up-to-date Cygwin.

I got "unable to remap to same address as parent" and did a rebaseall.
It failed:

     $ /bin/rebaseall
     rebaseall: '/Users/TMCDAN~1/AppData/Local/Temp' is not writable

I hand-disabled the condition that produced that and did some
testing.  I ran these commands in bash:

$ [[ -d /Users/TMCDAN~1/AppData/Local/Temp ]] && echo yes || echo no
yes

$ [[ -w /Users/TMCDAN~1/AppData/Local/Temp ]] && echo yes || echo no
yes

$ [ -d /Users/TMCDAN~1/AppData/Local/Temp ] && echo yes || echo no
yes

$ [ -w /Users/TMCDAN~1/AppData/Local/Temp ] && echo yes || echo no
yes

$ /bin/ash -c ' [ -d /Users/TMCDAN~1/AppData/Local/Temp ] && echo yes || echo no                                                             '
yes

$ /bin/ash -c ' [ -w /Users/TMCDAN~1/AppData/Local/Temp ] && echo yes || echo no'
no

$ /bin/ash -c ' [ -d /Users/tmcdaniel/AppData/Local/Temp ] && echo yes || echo no'
yes

$ /bin/ash -c ' [ -w /Users/tmcdaniel/AppData/Local/Temp ] && echo yes || echo no'
no

So bash and ash disagree on whether this Temp directory is writable.

$ echo long > /Users/tmcdaniel/AppData/Local/Temp/long
$ echo short > /Users/TMCDAN~1/AppData/Local/Temp/short
$ ash -c 'echo ashlong > /Users/tmcdaniel/AppData/Local/Temp/ashlong'
$ ash -c 'echo ashshort > /Users/TMCDAN~1/AppData/Local/Temp/ashshort'
$ ls -l /Users/tmcdaniel/AppData/Local/Temp/*short* /Users/tmcdaniel/AppData/Local/Temp/*long*
-rw-r--r--+ 1 tmcdaniel Domain Users 8 Nov 30 16:10 /Users/tmcdaniel/AppData/Local/Temp/ashlong
-rw-r--r--+ 1 tmcdaniel Domain Users 9 Nov 30 16:11 /Users/tmcdaniel/AppData/Local/Temp/ashshort
-rw-r--r--+ 1 tmcdaniel Domain Users 5 Nov 30 16:10 /Users/tmcdaniel/AppData/Local/Temp/long
-rw-r--r--+ 1 tmcdaniel Domain Users 6 Nov 30 16:10 /Users/tmcdaniel/AppData/Local/Temp/short

So bash is right about it being writable, and ash is wrong.
(And /Users/tmcdaniel and /Users/TMCDAN~1 do indeed point to the same
directory.)

-- 
Tim McDaniel, tmcd AT panix DOT com

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