126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Poweroff reboot and halt, oh my.
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*
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* Copyright 2006 by Rob Landley <rob@landley.net>
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*
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* Licensed under GPL version 2, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include <sys/reboot.h>
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#if ENABLE_FEATURE_WTMP
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#include <sys/utsname.h>
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#include <utmp.h>
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static void write_wtmp(void)
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{
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struct utmp utmp;
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struct utsname uts;
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if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) {
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close(creat(bb_path_wtmp_file, 0664));
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}
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memset(&utmp, 0, sizeof(utmp));
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utmp.ut_tv.tv_sec = time(NULL);
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safe_strncpy(utmp.ut_user, "shutdown", UT_NAMESIZE);
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utmp.ut_type = RUN_LVL;
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safe_strncpy(utmp.ut_id, "~~", sizeof(utmp.ut_id));
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safe_strncpy(utmp.ut_line, "~~", UT_LINESIZE);
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if (uname(&uts) == 0)
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safe_strncpy(utmp.ut_host, uts.release, sizeof(utmp.ut_host));
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updwtmp(bb_path_wtmp_file, &utmp);
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}
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#else
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#define write_wtmp() ((void)0)
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#endif
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#ifndef RB_HALT_SYSTEM
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#define RB_HALT_SYSTEM RB_HALT
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#endif
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#ifndef RB_POWERDOWN
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/* Stop system and switch power off if possible. */
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# define RB_POWERDOWN 0x4321fedc
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#endif
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#ifndef RB_POWER_OFF
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# define RB_POWER_OFF RB_POWERDOWN
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#endif
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int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int halt_main(int argc UNUSED_PARAM, char **argv)
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{
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static const int magic[] = {
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RB_HALT_SYSTEM,
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RB_POWER_OFF,
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RB_AUTOBOOT
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};
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static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
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int delay = 0;
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int which, flags, rc;
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/* Figure out which applet we're running */
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for (which = 0; "hpr"[which] != applet_name[0]; which++)
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continue;
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/* Parse and handle arguments */
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opt_complementary = "d+"; /* -d N */
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/* We support -w even if !ENABLE_FEATURE_WTMP,
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* in order to not break scripts.
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* -i (shut down network interfaces) is ignored.
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*/
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flags = getopt32(argv, "d:nfwi", &delay);
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sleep(delay);
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write_wtmp();
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if (flags & 8) /* -w */
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return EXIT_SUCCESS;
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if (!(flags & 2)) /* no -n */
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sync();
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/* Perform action. */
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rc = 1;
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if (!(flags & 4)) { /* no -f */
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//TODO: I tend to think that signalling linuxrc is wrong
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// pity original author didn't comment on it...
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if (ENABLE_FEATURE_INITRD) {
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/* talk to linuxrc */
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/* bbox init/linuxrc assumed */
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pid_t *pidlist = find_pid_by_name("linuxrc");
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if (pidlist[0] > 0)
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rc = kill(pidlist[0], signals[which]);
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if (ENABLE_FEATURE_CLEAN_UP)
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free(pidlist);
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}
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if (rc) {
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/* talk to init */
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if (!ENABLE_FEATURE_CALL_TELINIT) {
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/* bbox init assumed */
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rc = kill(1, signals[which]);
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} else {
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/* SysV style init assumed */
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/* runlevels:
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* 0 == shutdown
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* 6 == reboot */
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rc = execlp(CONFIG_TELINIT_PATH,
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CONFIG_TELINIT_PATH,
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which == 2 ? "6" : "0",
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(char *)NULL
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);
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}
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}
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} else {
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rc = reboot(magic[which]);
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}
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if (rc)
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bb_perror_nomsg_and_die();
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return rc;
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}
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