ftp.nice.ch/pub/next/unix/mail/mh.6.7.s.tar.gz#/mh/sbr/push.c

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/* push.c - push a fork into the background */

#include "../h/mh.h"
#include <stdio.h>
#include <signal.h>


void	push () {
    register int     i;

    for (i = 0; i < 5; i++) {
	switch (fork ()) {
	    case NOTOK: 
		sleep (5);
		continue;

	    case OK: 
		(void) signal (SIGHUP, SIG_IGN);
		(void) signal (SIGINT, SIG_IGN);
		(void) signal (SIGQUIT, SIG_IGN);
		(void) signal (SIGTERM, SIG_IGN);
#ifdef	SIGTSTP
		(void) signal (SIGTSTP, SIG_IGN);
		(void) signal (SIGTTIN, SIG_IGN);
		(void) signal (SIGTTOU, SIG_IGN);
#endif	SIGTSTP
		(void) freopen ("/dev/null", "r", stdin);
		(void) freopen ("/dev/null", "w", stdout);
		break;

	    default: 
		done (0);
	}
	break;
    }
    if (i >= 5)
	advise (NULLCP, "unable to fork, so can't push...");
}

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.