Changeset 2725 in MondoRescue for branches/2.2.9/mindi-busybox/init/halt.c

Timestamp:

Feb 25, 2011, 9:26:54 PM (13 years ago)

Author:

Bruno Cornec

Message:

• Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3

File:

• branches/2.2.9/mindi-busybox/init/halt.c (modified) (2 diffs)

branches/2.2.9/mindi-busybox/init/halt.c

@@ -5 +5 @@
  * 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:     "\nOptions:"
+//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:     "\nOptions:"
+//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:     "\nOptions:"
+//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"
 
-int halt_main(int argc, char **argv);
-int halt_main(int argc, char **argv)
+#if ENABLE_FEATURE_WTMP
+#include <sys/utsname.h>
+#include <utmp.h>
+
+static void write_wtmp(void)
+{
+    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
+
+
+int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int halt_main(int argc UNUSED_PARAM, 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
+        RB_HALT_SYSTEM,
+        RB_POWER_OFF,
+        RB_AUTOBOOT
     };
-    static const int signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
+    static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
 
-    char *delay;
-    int which, flags, rc = 1;
+    int delay = 0;
+    int which, flags, rc;
 
     /* Figure out which applet we're running */
-    for (which = 0; "hpr"[which] != *applet_name; which++);
+    for (which = 0; "hpr"[which] != applet_name[0]; which++)
+        continue;
 
     /* Parse and handle arguments */
-    flags = getopt32(argv, "d:nf", &delay);
-    if (flags & 1) sleep(xatou(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) {
+            /* talk to linuxrc */
+            /* bbox init/linuxrc assumed */
             pid_t *pidlist = find_pid_by_name("linuxrc");
             if (pidlist[0] > 0)
@@ -49 +149 @@
                 free(pidlist);
         }
-        if (rc)
-            rc = kill(1, signals[which]);
-    } else
+        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 */
+                rc = execlp(CONFIG_TELINIT_PATH,
+                        CONFIG_TELINIT_PATH,
+                        which == 2 ? "6" : "0",
+                        (char *)NULL
+                );
+            }
+        }
+    } else {
         rc = reboot(magic[which]);
+    }
 
     if (rc)
-        bb_error_msg("no");
+        bb_perror_nomsg_and_die();
     return rc;
 }