Patch from Denis Vlasenko to constify things and fix a few typos.
[platform/upstream/busybox.git] / init / halt.c
1 /* vi: set sw=4 ts=4: */
2 /*
3  * Poweroff reboot and halt, oh my.
4  *
5  * Copyright 2006 by Rob Landley <rob@landley.net>
6  *
7  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8  */
9
10 #include <signal.h>
11 #include <sys/reboot.h>
12 #include "busybox.h"
13
14 #include <unistd.h>
15
16 int halt_main(int argc, char *argv[])
17 {
18         static const int magic[] = {RB_HALT_SYSTEM, RB_POWER_OFF, RB_AUTOBOOT};
19         static const int signals[] = {SIGUSR1, SIGUSR2, SIGTERM};
20
21         char *delay = "hpr";
22         int which, flags, rc = 1;
23
24         /* Figure out which applet we're running */
25         for(which=0;delay[which]!=*bb_applet_name;which++);
26
27         /* Parse and handle arguments */
28         flags = bb_getopt_ulflags(argc, argv, "d:nf", &delay);
29         if (flags&1) sleep(atoi(delay));
30         if (!(flags&2)) sync();
31         
32         /* Perform action. */
33         if (ENABLE_INIT && !(flags & 4)) {
34                 if (ENABLE_FEATURE_INITRD) {
35                         long *pidlist=find_pid_by_name("linuxrc");
36                         if (*pidlist>0) rc = kill(*pidlist,signals[which]);
37                         if (ENABLE_FEATURE_CLEAN_UP) free(pidlist);
38                 }
39                 if (rc) rc = kill(1,signals[which]);
40         } else rc = reboot(magic[which]);
41
42         if (rc) bb_error_msg("No.");
43         return rc;
44 }