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From: hutch@sdcsvax.UCSD.EDU (Jim Hutchison)
Newsgroups: comp.unix.wizards
Subject: Programming around zombies (Was Re: Zombies ???)
Message-ID: <2290@sdcsvax.UCSD.EDU>
Date: Tue, 9-Dec-86 18:23:55 EST
Article-I.D.: sdcsvax.2290
Posted: Tue Dec  9 18:23:55 1986
Date-Received: Wed, 10-Dec-86 05:34:35 EST
References: <1327@brl-adm.ARPA> <165@hqda-ai.UUCP>
Reply-To: hutch@sdcsvax.UUCP (Jim Hutchison)
Organization: UCSD EMU Project (Educational Microcomputer Unix)
Lines: 29

<>
Setting SIGCHLD to SIGIGN will cause init to adopt your poor child and let
it exit in peace.  This works under sys III (PC/IX), and berkeley 4.3, no
others verified.  Here is a sample program (its real short).


#include <stdio.h>
#include <sys/signal.h>

main()
{
    if (fork() == 0) {					/* seperate noodles */
	if ((long)signal(SIGCHLD,SIG_IGN) == -1L) {	/* Ignored child    */
	    fprintf(stderr,"Signal failed in child\n");
	    exit(-1);
	}
	puts("Child waiting");
	sleep(5);					/* for parent to exit */
	puts("Bye bye");
	exit(0);
    }
    puts("Parent Bails");
    exit(0);
}
-- 
=
    Jim Hutchison   		UUCP:	{dcdwest,ucbvax}!sdcsvax!hutch
		    		ARPA:	Hutch@sdcsvax.ucsd.edu
panic -- no witty phrase