Date: Fri, 25 Aug 2000 11:28:47 -0700 From: "'Alfred Perlstein'" <bright@wintelcom.net> To: Ben Smithurst <ben@FreeBSD.org> Cc: "Yevmenkin, Maksim N, CSCIO" <myevmenkin@att.com>, core-ix@hushmail.com, freebsd-hackers@FreeBSD.org Subject: Re: Preventing zombies to occure Message-ID: <20000825112847.Z1209@fw.wintelcom.net> In-Reply-To: <20000825175439.C30144@strontium.scientia.demon.co.uk>; from ben@FreeBSD.org on Fri, Aug 25, 2000 at 05:54:39PM %2B0100 References: <E598F159668DD311B9C700902799EAF44734E5@njb140po01.ems.att.com> <20000825062409.O1209@fw.wintelcom.net> <20000825175439.C30144@strontium.scientia.demon.co.uk>
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* Ben Smithurst <ben@FreeBSD.org> [000825 10:15] wrote:
> 'Alfred Perlstein' wrote:
>
> > int
> > sigchld_handler(int)
> > {
> >
> > while (waitpid(-1, NULL, 0) || errno == EINTR)
> > ;
> > }
>
> Even more paranoid would be
>
> int
> sigchld_handler(int)
> {
> int e = errno;
>
> while (waitpid(-1, NULL, 0) || errno == EINTR)
> ;
>
> errno = e;
> }
>
> otherwise you could get bogus errors reported, I think.
>
> if ((fp = fopen(foo, "r")) == NULL)
> /* SIGCHLD arrives here */
> warn("can't open foo");
The code I presented is flawed as a result of an allnighter dealing
with postresql. I'll enjoy thinking about this over the weekend. :)
-Alfred
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