[comp.unix.wizards] Programming around zombies

hutch@sdcsvax.UCSD.EDU (Jim Hutchison) (12/10/86)

<>
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