Right. Unfortunately, httpd not only gets a ppid of 1, but it starts a
new process group itself (which makes sense for its needs). If only a
process could be a member of multiple hierarchical process groups :),
but as I understand it, it only gets one.
On Tue, 25 Aug 2009 09:56 +0100, "Mark Morgan" <makk...@gmail.com>
wrote:
> On Mon, Aug 24, 2009 at 6:37 PM, Jonathan Swartz<swa...@pobox.com> wrote:
> > Yes, getting the pid from each process launch is not the problem - it's
> > more of a wish that I could do this automagically somehow, instead of
> > having to collect all the pids somewhere. But it seems as if I'll have
> > to do that.
>
> Is it feasible for what your doing to fork off, and do a setsid call
> to create a new process group? If so, at the end of the testing, you
> can just send a signal to your process group, to kill off the
> forked-off processes. Saves having to keep track of all forked off
> processes...
>
> sample script (without error checking)
>
> ===
> #!/usr/bin/perl
>
> use strict;
> use warnings;
>
> use POSIX qw( setsid );
>
> if ( fork ) {
> exit; # parent just exits
> }
>
> my $sid = setsid;
>
> # do work here
>
> kill -2, $sid; # negative signal to send to process group
> ===
>
> Mark.
