DMARC-Filter: OpenDMARC Filter v1.4.2 delorie.com 55U9kMJG2720623
Date: Mon, 30 Jun 2025 11:45:54 +0200
To: cygwin@cygwin.com
Subject: Re: setpgid non-compliance with POSIX?
Message-ID: <aGJc0nVQ-1v1DqCO@calimero.vinschen.de>
Mail-Followup-To: cygwin@cygwin.com
References: <3391453b-7914-a319-fad8-4729610558ea@jdrake.com>
MIME-Version: 1.0
Content-Disposition: inline
In-Reply-To: <3391453b-7914-a319-fad8-4729610558ea@jdrake.com>
Precedence: list
From: Corinna Vinschen via Cygwin <cygwin@cygwin.com>
Reply-To: cygwin@cygwin.com
Cc: Corinna Vinschen <corinna-cygwin@cygwin.com>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Errors-To: cygwin-bounces~archive-cygwin=delorie.com@cygwin.com
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie.com@cygwin.com>

On Jun 28 12:32, Jeremy Drake via Cygwin wrote:
> I was looking at setpgid yesterday, and it seems deficient with respect to
> the errors required to be returned by the POSIX docs in
> https://pubs.opengroup.org/onlinepubs/9799919799/functions/setpgid.html
> 
> Basically, it seems that setpgid allows any arbitrary positive integer to
> be set as pgid, rather than restricting to setting it to either the
> process's pid or to an existing pgid in the same session (sid).

Yeah, error checking in setpgid is a bit on the lacking side.  With only
minor changes, the function is basically 25 years old :}

Off the top of my head I don't know how to check the pgid already exists.
Do you?


Corinna

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple