*
* Copyright 2006 by Rob Landley <rob@landley.net>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
-#include "busybox.h"
-#include <signal.h>
-#include <sys/reboot.h>
-#include <unistd.h>
+//applet:IF_HALT(APPLET(halt, BB_DIR_SBIN, BB_SUID_DROP))
+//applet:IF_HALT(APPLET_ODDNAME(poweroff, halt, BB_DIR_SBIN, BB_SUID_DROP, poweroff))
+//applet:IF_HALT(APPLET_ODDNAME(reboot, halt, BB_DIR_SBIN, BB_SUID_DROP, reboot))
-int halt_main(int argc, char *argv[])
+//kbuild:lib-$(CONFIG_HALT) += halt.o
+
+//config:config HALT
+//config: bool "poweroff, halt, and reboot"
+//config: default y
+//config: help
+//config: Stop all processes and either halt, reboot, or power off the system.
+//config:
+//config:config FEATURE_CALL_TELINIT
+//config: bool "Call telinit on shutdown and reboot"
+//config: default y
+//config: depends on HALT && !INIT
+//config: help
+//config: Call an external program (normally telinit) to facilitate
+//config: a switch to a proper runlevel.
+//config:
+//config: This option is only available if you selected halt and friends,
+//config: but did not select init.
+//config:
+//config:config TELINIT_PATH
+//config: string "Path to telinit executable"
+//config: default "/sbin/telinit"
+//config: depends on FEATURE_CALL_TELINIT
+//config: help
+//config: When busybox halt and friends have to call external telinit
+//config: to facilitate proper shutdown, this path is to be used when
+//config: locating telinit executable.
+
+//usage:#define halt_trivial_usage
+//usage: "[-d DELAY] [-n] [-f]" IF_FEATURE_WTMP(" [-w]")
+//usage:#define halt_full_usage "\n\n"
+//usage: "Halt the system\n"
+//usage: "\n -d SEC Delay interval"
+//usage: "\n -n Do not sync"
+//usage: "\n -f Force (don't go through init)"
+//usage: IF_FEATURE_WTMP(
+//usage: "\n -w Only write a wtmp record"
+//usage: )
+//usage:
+//usage:#define poweroff_trivial_usage
+//usage: "[-d DELAY] [-n] [-f]"
+//usage:#define poweroff_full_usage "\n\n"
+//usage: "Halt and shut off power\n"
+//usage: "\n -d SEC Delay interval"
+//usage: "\n -n Do not sync"
+//usage: "\n -f Force (don't go through init)"
+//usage:
+//usage:#define reboot_trivial_usage
+//usage: "[-d DELAY] [-n] [-f]"
+//usage:#define reboot_full_usage "\n\n"
+//usage: "Reboot the system\n"
+//usage: "\n -d SEC Delay interval"
+//usage: "\n -n Do not sync"
+//usage: "\n -f Force (don't go through init)"
+
+#include "libbb.h"
+#include "reboot.h"
+
+#if ENABLE_FEATURE_WTMP
+#include <sys/utsname.h>
+
+static void write_wtmp(void)
{
- 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,
+ struct utmp utmp;
+ struct utsname uts;
+ /* "man utmp" says wtmp file should *not* be created automagically */
+ /*if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) {
+ close(creat(bb_path_wtmp_file, 0664));
+ }*/
+ memset(&utmp, 0, sizeof(utmp));
+ utmp.ut_tv.tv_sec = time(NULL);
+ strcpy(utmp.ut_user, "shutdown"); /* it is wide enough */
+ utmp.ut_type = RUN_LVL;
+ utmp.ut_id[0] = '~'; utmp.ut_id[1] = '~'; /* = strcpy(utmp.ut_id, "~~"); */
+ utmp.ut_line[0] = '~'; utmp.ut_line[1] = '~'; /* = strcpy(utmp.ut_line, "~~"); */
+ uname(&uts);
+ safe_strncpy(utmp.ut_host, uts.release, sizeof(utmp.ut_host));
+ updwtmp(bb_path_wtmp_file, &utmp);
+}
+#else
+#define write_wtmp() ((void)0)
#endif
-RB_AUTOBOOT
+
+
+int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int halt_main(int argc UNUSED_PARAM, char **argv)
+{
+ static const int magic[] = {
+ RB_HALT_SYSTEM,
+ RB_POWER_OFF,
+ RB_AUTOBOOT
};
- static const int signals[] = {SIGUSR1, SIGUSR2, SIGTERM};
+ static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
- char *delay = "hpr";
- int which, flags, rc = 1;
+ int delay = 0;
+ int which, flags, rc;
/* Figure out which applet we're running */
- for(which=0;delay[which]!=*bb_applet_name;which++);
+ for (which = 0; "hpr"[which] != applet_name[0]; which++)
+ continue;
/* Parse and handle arguments */
- flags = bb_getopt_ulflags(argc, argv, "d:nf", &delay);
- if (flags&1) sleep(atoi(delay));
- if (!(flags&2)) sync();
+ opt_complementary = "d+"; /* -d N */
+ /* We support -w even if !ENABLE_FEATURE_WTMP,
+ * in order to not break scripts.
+ * -i (shut down network interfaces) is ignored.
+ */
+ flags = getopt32(argv, "d:nfwi", &delay);
+
+ sleep(delay);
+
+ write_wtmp();
+
+ if (flags & 8) /* -w */
+ return EXIT_SUCCESS;
+
+ if (!(flags & 2)) /* no -n */
+ sync();
/* Perform action. */
- if (ENABLE_INIT && !(flags & 4)) {
+ rc = 1;
+ if (!(flags & 4)) { /* no -f */
+//TODO: I tend to think that signalling linuxrc is wrong
+// pity original author didn't comment on it...
if (ENABLE_FEATURE_INITRD) {
- long *pidlist=find_pid_by_name("linuxrc");
- if (*pidlist>0) rc = kill(*pidlist,signals[which]);
- if (ENABLE_FEATURE_CLEAN_UP) free(pidlist);
+ /* talk to linuxrc */
+ /* bbox init/linuxrc assumed */
+ 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) {
+ /* talk to init */
+ if (!ENABLE_FEATURE_CALL_TELINIT) {
+ /* bbox init assumed */
+ rc = kill(1, signals[which]);
+ } else {
+ /* SysV style init assumed */
+ /* runlevels:
+ * 0 == shutdown
+ * 6 == reboot */
+ execlp(CONFIG_TELINIT_PATH,
+ CONFIG_TELINIT_PATH,
+ which == 2 ? "6" : "0",
+ (char *)NULL
+ );
+ bb_perror_msg_and_die("can't execute '%s'",
+ CONFIG_TELINIT_PATH);
+ }
}
- if (rc) rc = kill(1,signals[which]);
- } else rc = reboot(magic[which]);
+ } else {
+ rc = reboot(magic[which]);
+ }
- if (rc) bb_error_msg("No.");
+ if (rc)
+ bb_perror_nomsg_and_die();
return rc;
}
projects / platform / upstream / busybox.git / blobdiff