[Pkg-shadow-devel] Issue with concurrent usage of gpasswd

[Nicolas François]

Hello,

On Fri, Apr 13, 2012 at 11:27:11AM +0200, lboillet69 at gmail.com wrote:
> 
> On a Debian Lenny system, I had the issue where these two commands
> were executed at the same time:
>  adduser foo bargroup
>  adduser foo2 bargroup
> 
> The unexpected result was that only foo2 was added to bargroup. I
> looked at the changelog of the shadow program and from that I would
> assume that this behaviour is the same with the later versions.
> 
> I guess that gpasswd (which is called by the adduser script) does not
> lock /etc/group? Or is it a bug?

gpasswd locks /etc/group. It should have been the case also in lenny.

If you send me a script which can be used to reproduce this issue, I can
give it a try.

-- 
Nekral