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Message-ID: <53975A4C.5030504@skarnet.org>
Date: Tue, 10 Jun 2014 20:19:40 +0100
From: Laurent Bercot <ska-dietlibc@...rnet.org>
To: musl@...ts.openwall.com
Subject: Re: musl 1.0.x branch
On 10/06/2014 18:37, Rich Felker wrote:
> Sending the terminal fd over a socket with SCM_RIGHTS isn't
> sufficient? If the privileged process has root, it should be able to
> add itself to the process group of the client so that job control,
> terminal signals, etc. work right.
I may have missed something, but AFAICT, no, it cannot do that.
From http://pubs.opengroup.org/onlinepubs/9699919799/functions/setpgid.html :
setpgid() only allows the calling process to join a process group
already in use inside its session or create a new process group
whose process group ID was equal to its process ID.
And I see nothing, not even setpgrp(), that could set the pgid to
an arbitrary value.
--
Laurent
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