Date: Fri, 25 Aug 2000 17:54:39 +0100 From: Ben Smithurst <ben@FreeBSD.org> To: "'Alfred Perlstein'" <bright@wintelcom.net> Cc: "Yevmenkin, Maksim N, CSCIO" <myevmenkin@att.com>, core-ix@hushmail.com, freebsd-hackers@FreeBSD.ORG Subject: Re: Preventing zombies to occure Message-ID: <20000825175439.C30144@strontium.scientia.demon.co.uk> In-Reply-To: <20000825062409.O1209@fw.wintelcom.net> References: <E598F159668DD311B9C700902799EAF44734E5@njb140po01.ems.att.com> <20000825062409.O1209@fw.wintelcom.net>
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'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");
--
Ben Smithurst / ben@FreeBSD.org / PGP: 0x99392F7D
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