source: trunk/third/nmh/sbr/push.c @ 12455

/*
 * push.c -- push a fork into the background
 *
 * $Id: push.c,v 1.1.1.1 1999-02-07 18:14:09 danw Exp $
 */

#include <h/mh.h>
#include <h/signals.h>
#include <signal.h>


void
push(void)
{
    pid_t pid;
    int i;

    for (i = 0; (pid = fork()) == -1 && i < 5; i++)
        sleep (5);

    switch (pid) {
        case -1:
            /* fork error */
            advise (NULL, "unable to fork, so can't push...");
            break;

        case 0:
            /* child, block a few signals and continue */
            SIGNAL (SIGHUP, SIG_IGN);
            SIGNAL (SIGINT, SIG_IGN);
            SIGNAL (SIGQUIT, SIG_IGN);
            SIGNAL (SIGTERM, SIG_IGN);
#ifdef SIGTSTP
            SIGNAL (SIGTSTP, SIG_IGN);
            SIGNAL (SIGTTIN, SIG_IGN);
            SIGNAL (SIGTTOU, SIG_IGN);
#endif
            freopen ("/dev/null", "r", stdin);
            freopen ("/dev/null", "w", stdout);
            break;

        default:
            /* parent, just exit */
            done (0);
    }
}