Date: Thu, 31 Oct 1996 10:17:39 -0500 (EST) From: Rick Weldon <rick@wisetech.com> To: Rodrigo Ormonde <ormonde@trem.cnt.org.br> Cc: hackers@freebsd.org Subject: Re: Zombie processes Message-ID: <Pine.BSF.3.91.961031101149.27432A-100000@badboy.wisetech.com> In-Reply-To: <9610311301.AA11007@trem.cnt.org.br>
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On Thu, 31 Oct 1996, Rodrigo Ormonde wrote:
> Everything is working fine, except for the fact that when the child
> processes exit they become zombies. Every time a new connection is
established
> and finished there is a new zombie process. I can't execute a wait() on the
> parent process because it has to listen to new connections and can't be
block$
> on the wait() call.
> Is there any way to remove the zombie process from the system without
> blocking the parent process ?
You have to tell the parent to ignore the kids. I
got this straight from Stevens Network Programming page 70 something.
Here is a sig handler
/* ignore the kids, BSD requires that we define a func to call on SIGCHLD */
sig_child()
{
int pid;
int status;
while( (pid=wait3(&status,(int)WNOHANG, (struct rusage *) 0)) > 0);
}
Then just install the handler in main in the parent:
signal(SIGCHLD,(sig_t) sig_child);
The children are ignored and the parent drives on.
Rick
| Rick Weldon -- WISE-Tech LLC
| E-mail: rick@wisetech.com
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