Re: [ -w filename ] returns true when permissions are -r--r--r--

["Larry Hall (Cygwin)" <reply-to-list-only-lh at cygwin dot com>]

On 7/21/2011 9:31 AM, Corinna Vinschen wrote:
> On Jul 21 07:43, Nellis, Kenneth wrote:
> > > 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
> > $
>
> What system?  XP, Vista?  7?
> What's the output of `id'?

Or even <http://cygwin.com/snapshots/>. ;-)


--
Larry

_____________________________________________________________________

A: Yes.
> Q: Are you sure?
>> A: Because it reverses the logical flow of conversation.
>>> Q: Why is top posting annoying in email?

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