Bump to version 1.22.1

[platform/upstream/busybox.git] / init / halt.c

diff --git a/init/halt.c b/init/halt.c
index 16906df..7974adb 100644 (file)
--- a/init/halt.c
+++ b/init/halt.c
@@ -4,50 +4,96 @@
  *
  * Copyright 2006 by Rob Landley <rob@landley.net>
  *
- * Licensed under GPL version 2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 
+//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))
+
+//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 <sys/reboot.h>
+#include "reboot.h"
 
 #if ENABLE_FEATURE_WTMP
 #include <sys/utsname.h>
-#include <utmp.h>
 
 static void write_wtmp(void)
 {
        struct utmp utmp;
        struct utsname uts;
-       if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) {
+       /* "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);
-       safe_strncpy(utmp.ut_user, "shutdown", UT_NAMESIZE);
+       strcpy(utmp.ut_user, "shutdown"); /* it is wide enough */
        utmp.ut_type = RUN_LVL;
-       safe_strncpy(utmp.ut_id, "~~", sizeof(utmp.ut_id));
-       safe_strncpy(utmp.ut_line, "~~", UT_LINESIZE);
-       if (uname(&uts) == 0)
-               safe_strncpy(utmp.ut_host, uts.release, sizeof(utmp.ut_host));
+       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
 
-#ifndef RB_HALT_SYSTEM
-#define RB_HALT_SYSTEM RB_HALT
-#endif
-
-#ifndef RB_POWERDOWN
-/* Stop system and switch power off if possible.  */
-# define RB_POWERDOWN   0x4321fedc
-#endif
-#ifndef RB_POWER_OFF
-# define RB_POWER_OFF RB_POWERDOWN
-#endif
-
 
 int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int halt_main(int argc UNUSED_PARAM, char **argv)
@@ -108,11 +154,13 @@ int halt_main(int argc UNUSED_PARAM, char **argv)
                                /* runlevels:
                                 * 0 == shutdown
                                 * 6 == reboot */
-                               rc = execlp(CONFIG_TELINIT_PATH,
+                               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);
                        }
                }
        } else {