Date: Tue, 9 Jul 1996 15:14:19 -0500 (CDT) From: Alex Nash <alex@fa.tdktca.com> To: Brandon Gillespie <brandon@tombstone.sunrem.com> Cc: freebsd-hackers@freebsd.org Subject: Re: handling SIGCHLD with multiple children Message-ID: <Pine.BSF.3.91.960709151339.13009E-100000@fa.tdktca.com> In-Reply-To: <Pine.BSF.3.91.960709122409.4725A-100000@tombstone.sunrem.com>
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On Tue, 9 Jul 1996, Brandon Gillespie wrote:
> Is there _ANY_ way of finding what child sent a SIGCHLD signal to the
> parent process? I have a situation where a parent may have multiple
> children processing different tasks, and the parent is waiting for one
> child to complete a specific task, which it cares about, but it does not
> care about the other children. Because of this in most instances when
> SIGCHLD is received it simply resets it and continues working, except for
> now I need to handle things differently when a specific child sends
> SIGCHLD. Is there any ANY way to figure out where it came from?
>
> Thanks..
>
> -Brandon
>
See the man page for wait3:
RETURN VALUES
If wait() returns due to a stopped or terminated child process, the pro-
cess ID of the child is returned to the calling process. Otherwise, a
value of -1 is returned and errno is set to indicate the error.
Alex
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