In the signal handler for my daemon processes I want to kill all processes
when I get SIGQUIT. Currently I catch SIGQUIT and issue:

kill(-process_group, SIGABRT);

However this requires that I know the process group value. Is there
a sure-fire way to get the process group id from within a signal
handler? Would the following be suitable?

killpg(0, SIGABRT);

Thanks,
Mike

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In article <pan.2005.07.16.02.00.11.544713@ioplex.com>,
Michael B Allen <mba2000@ioplex.com> wrote:

> In the signal handler for my daemon processes I want to kill all processes
> when I get SIGQUIT. Currently I catch SIGQUIT and issue:
>
>   kill(-process_group, SIGABRT);
>
> However this requires that I know the process group value. Is there
> a sure-fire way to get the process group id from within a signal
> handler? Would the following be suitable?

The top-most process of the daemon should establish itself as the
process group leader, so process_group == PID.

>
>   killpg(0, SIGABRT);

Yes, that should work as well.  0 means to send to the current process's
group.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

[ Post a follow-up to this message ]

In article <pan.2005.07.16.02.00.11.544713@ioplex.com>,
Michael B Allen <mba2000@ioplex.com> wrote:

> In the signal handler for my daemon processes I want to kill all processes
> when I get SIGQUIT. Currently I catch SIGQUIT and issue:
>
>   kill(-process_group, SIGABRT);
>
> However this requires that I know the process group value. Is there
> a sure-fire way to get the process group id from within a signal
> handler? Would the following be suitable?

The top-most process of the daemon should establish itself as the
process group leader, so process_group == PID.

>
>   killpg(0, SIGABRT);

Yes, that should work as well.  0 means to send to the current process's
group.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

[ Post a follow-up to this message ]