GNU bug report logs - #15945
chown: accept "[NUMERIC-ID]:" syntax

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eric Blake <eblake <at> redhat.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#15945: closed (chown: Does now allow setting user and users
 login group with numerical user ID)
Date: Thu, 21 Nov 2013 15:54:03 +0000

[Message part 1 (text/plain, inline)]

Your message dated Thu, 21 Nov 2013 08:53:47 -0700
with message-id <528E2C8B.4080708 <at> redhat.com>
and subject line Re: bug#15945: chown: Does now allow setting user and users login group with numerical user ID
has caused the debbugs.gnu.org bug report #15945,
regarding chown: Does now allow setting user and users login group with numerical user ID
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
15945: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=15945
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Tormen <quickhelp <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: chown: Does now allow setting user and users login group with
 numerical user ID
Date: Thu, 21 Nov 2013 12:50:40 +0100

Dear Gnu Team,

First off: Thanks for existing!! :)))

I think I just found a bug in chown... \o/ ;)

Details about my GNU/Linux system:
	Debian wheezy stable 7.2

	dpkg -S /bin/chown
	coreutils: /bin/chown

	dpkg -l|grep coreutils
	ii  coreutils      8.13-3.5    amd64   GNU core utilities

	uname -a
	Linux seven 3.10-0.bpo.3-amd64 #1 SMP Debian 3.10.11-1~bpo70+1
(2013-09-24) x86_64 GNU/Linux

	echo $SHELL
	/bin/zsh

I tried:
	chown 1001: /tmp/bla

Leading to:
	chown: invalid spec: `1001:'

But as 1001 == "me", it should have done a:
	chown me: /tmp/bla
(which works just fine).

Is this a bug or a feature ?

... it should be a bug except if there is a technical detail I am
missing here.

Best,

Tormen

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From: Eric Blake <eblake <at> redhat.com>
To: Tormen <quickhelp <at> gmail.com>, 15945-done <at> debbugs.gnu.org
Subject: Re: bug#15945: chown: Does now allow setting user and users login
 group with numerical user ID
Date: Thu, 21 Nov 2013 08:53:47 -0700

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tag 15945 notabug
thanks

On 11/21/2013 04:50 AM, Tormen wrote:

> 
> I think I just found a bug in chown... \o/ ;)
> 
> I tried:
> 	chown 1001: /tmp/bla
> 
> Leading to:
> 	chown: invalid spec: `1001:'

Drop the trailing colon.

> ... it should be a bug except if there is a technical detail I am
> missing here.

If you provide a colon, you MUST also provide a group spec.  Per 'chown
--help', the syntax is:
 chown [OPTION]...  [OWNER][:[GROUP]] FILE...
so these are valid:
 chown 1001 /tmp/bla        # change owner only
 chown :1001 /tmp/bla       # change group only
 chown 1001:1001 /tmp/bla   # change both
but this is invalid:
 chown 1001: /tmp/bla       # '' is not a valid group

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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