source: MondoRescue/branches/2.2.5/mindi-busybox/init/halt.c@ 3332

/* vi: set sw=4 ts=4: */
/*
 * Poweroff reboot and halt, oh my.
 *
 * Copyright 2006 by Rob Landley <rob@landley.net>
 *
 * Licensed under GPL version 2, see file LICENSE in this tarball for details.
 */

#include "libbb.h"
#include <sys/reboot.h>

int halt_main(int argc, char **argv);
int halt_main(int argc, char **argv)
{
    static const int magic[] = {
#ifdef RB_HALT_SYSTEM
RB_HALT_SYSTEM,
#elif defined RB_HALT
RB_HALT,
#endif
#ifdef RB_POWER_OFF
RB_POWER_OFF,
#elif defined RB_POWERDOWN
RB_POWERDOWN,
#endif
RB_AUTOBOOT
    };
    static const int signals[] = { SIGUSR1, SIGUSR2, SIGTERM };

    char *delay;
    int which, flags, rc = 1;

    /* Figure out which applet we're running */
    for (which = 0; "hpr"[which] != *applet_name; which++);

    /* Parse and handle arguments */
    flags = getopt32(argv, "d:nf", &delay);
    if (flags & 1) sleep(xatou(delay));
    if (!(flags & 2)) sync();

    /* Perform action. */
    if (ENABLE_INIT && !(flags & 4)) {
        if (ENABLE_FEATURE_INITRD) {
            pid_t *pidlist = find_pid_by_name("linuxrc");
            if (pidlist[0] > 0)
                rc = kill(pidlist[0], signals[which]);
            if (ENABLE_FEATURE_CLEAN_UP)
                free(pidlist);
        }
        if (rc)
            rc = kill(1, signals[which]);
    } else
        rc = reboot(magic[which]);

    if (rc)
        bb_error_msg("no");
    return rc;
}