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Subject: RE: [ -w filename ]  returns true when permissions are -r--r--r--
Date: Thu, 21 Jul 2011 07:43:10 -0500
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From: "Nellis, Kenneth" <Kenneth DOT Nellis AT acs-inc DOT com>
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> From: Eric Blake
> On 07/20/2011 12:05 PM, Reid Thompson wrote:
> > Is this broken?  Or a known windows/cygwin discrepancy?  Or am I
> missing
> > something with my posix/windows file permissions settings
> 
> If you are running as an administrator, that might explain it.  Admins
> can alter any file regardless of permissions, in which case [ -w is
> telling you the truth that under your current uid, you can indeed write
> to the file.
> 
> This is a feature of access(file,W_OK), and not a bug.

FWIW, I'm not running as administrator and I'm running 1.7.9, and I'm
seeing the same thing:

$ touch afile
$ chmod 444 afile
$ ls -l
total 0
-r--r--r-- 1 knellis knellis 0 Jul 21 08:36 afile
$ [ -w afile ] && echo writable || echo not writable
writable
$ echo abc >> afile
$ cat afile
abc
$ ls -l
total 1
-r--r--r-- 1 knellis knellis 4 Jul 21 08:37 afile
$

--Ken Nellis