Date: 12 Jul 2001 22:40:12 +0300 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Anton Berezin <tobez@tobez.org> Cc: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de>, freebsd-current@FreeBSD.ORG Subject: Re: cannot print to remote printer Message-ID: <86k81eaqcj.fsf@hades.hell.gr> In-Reply-To: Anton Berezin's message of "Thu, 12 Jul 2001 12:21:48 %2B0200" References: <lth8zikptx0.wl@hunter.munich.sgi.com> <p05101003b759266483c2@> <p05101003b759266483c2@[128.113.24.47]> <873d83pquy.wl@wilhelm.noname> <20010711214311.C2855@heechee.tobez.org> <200107120645.f6C6jtP45267@uriah.heep.sax.de> <20010712122148.B10960@heechee.tobez.org>
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Anton Berezin <tobez@tobez.org> writes:
> On Thu, Jul 12, 2001 at 08:45:55AM +0200, Joerg Wunsch wrote:
> > Anton Berezin <tobez@FreeBSD.ORG> wrote:
> >
> > > if (fork() == 0) {
> > > - signal(SIGCHLD, SIG_IGN);
> > > + signal(SIGCHLD, SIG_DFL);
> >
> > This is unportable.
>
> > If you want automatic zombie reaping, better don't use the simplified
> > signal(3) handling, but instead spell it out as sigaction(2) using the
> > SA_NOCLDWAIT flag. The above won't even give you a warning on systems
> > that don't implement automatic zombie reaping, while with sicaction,
> > you'll get a compile-time error for SA_NOCLDWAIT not being defined.
>
> Umm, I don't understand. I do not want automatic zombie reaping, I want
> exactly the opposite, and my patch does just that.
I might be wrong in many ways, but...
is it then mandatory that you `reset' SIGCHLD to SIG_DFL ?
Why not leave it in it's default state, and make this patch:
- signal(SIGCHLD, SIG_IGN);
without adding any lines?
I'm in a wild rush, and I don't have the time to actually look at the code or
test it. I will, soon, though...
-giorgos
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