method

daemon

v1_9_1_378 - Show latest stable - 0 notes - Class: Process

daemon(p1 = v1, p2 = v2) public

Detach the process from controlling terminal and run in the background as system daemon. Unless the argument nochdir is true (i.e. non false), it changes the current working directory to the root (“/”). Unless the argument noclose is true, daemon() will redirect standard input, standard output and standard error to /dev/null.

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static VALUE
proc_daemon(int argc, VALUE *argv)
{
    VALUE nochdir, noclose;
#if defined(HAVE_DAEMON) || defined(HAVE_FORK)
    int n;
#endif

    rb_secure(2);
    rb_scan_args(argc, argv, "02", &nochdir, &noclose);

#if defined(HAVE_DAEMON)
    prefork();
    before_fork();
    n = daemon(RTEST(nochdir), RTEST(noclose));
    after_fork();
    if (n < 0) rb_sys_fail("daemon");
    return INT2FIX(n);
#elif defined(HAVE_FORK)
    switch (rb_fork(0, 0, 0, Qnil)) {
      case -1:
        return INT2FIX(-1);
      case 0:
        break;
      default:
        _exit(0);
    }

    proc_setsid();

    /* must not be process-leader */
    switch (rb_fork(0, 0, 0, Qnil)) {
      case -1:
        return INT2FIX(-1);
      case 0:
        break;
      default:
        _exit(0);
    }

    if (!RTEST(nochdir))
        (void)chdir("/");

    if (!RTEST(noclose) && (n = open("/dev/null", O_RDWR, 0)) != -1) {
        (void)dup2(n, 0);
        (void)dup2(n, 1);
        (void)dup2(n, 2);
        if (n > 2)
            (void)close (n);
    }
    return INT2FIX(0);
#else
    rb_notimplement();
#endif
}

daemon

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