owl-users - Re: chmod isn't validating its output?

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Date: Thu, 22 Jan 2009 13:13:34 +0300
From: "Dmitry V. Levin" <ldv@...linux.org>
To: owl-users@...ts.openwall.com
Subject: Re: chmod isn't validating its output?

Hi,

On Thu, Jan 22, 2009 at 11:44:07AM +0300, (GalaxyMaster) wrote:
> Dmitry,
> 
> I'm just curious whether we need to fix this or not in our coreutils
> package.  The following example demonstrates the issue.  It's not a
> bug, but is something we might want to fix and to submit upstream.
> 
> mother!galaxy:~$ ls -l sample.file
> -rw------- 1 galaxy galaxy 0 2009-01-22 11:34 sample.file
> mother!galaxy:~$ chmod g+o sample.file
> mother!galaxy:~$ echo $?
> 0
> mother!galaxy:~$ ls -l sample.file
> -rw------- 1 galaxy galaxy 0 2009-01-22 11:34 sample.file
> mother!galaxy:~$ rpm -qf `which chmod`
> coreutils-5.93-owl2
> mother!galaxy:~$
> 
> Note that I supplied chmod with weird permission symbol and it didn't
> complain and hasn't returned any failure code.
> 
> Since we have one of the coreutils maintainers in out team :) I thought
> it would be appropriate to ask here whether I should submit the bug
> report to the coreutils developers or is this "feature" here on a
> purpose?  If it's the latter I would like to know why (just to learn
> some history behind it :) )

This is a documented feature, see
$ info coreutils 'Symbolic Modes'
especially the node "Copying Permissions".


-- 
ldv

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