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    Annotation of /trunk/mkinitrd-magellan/busybox/init/halt.c

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    Revision 816 - (hide annotations) (download)
    Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
    File MIME type: text/plain
    File size: 2265 byte(s) 
    -updated to busybox-1.13.4
    1 niro 532 /* 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 GPL version 2, see file LICENSE in this tarball for details.
    8     */
    9    
    10 niro 816 #include "libbb.h"
    11 niro 532 #include <sys/reboot.h>
    12    
    13 niro 816 #if ENABLE_FEATURE_WTMP
    14     #include <sys/utsname.h>
    15     #include <utmp.h>
    16    
    17     static void write_wtmp(void)
    18 niro 532 {
    19 niro 816 struct utmp utmp;
    20     struct utsname uts;
    21     if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) {
    22     close(creat(bb_path_wtmp_file, 0664));
    23     }
    24     memset(&utmp, 0, sizeof(utmp));
    25     utmp.ut_tv.tv_sec = time(NULL);
    26     safe_strncpy(utmp.ut_user, "shutdown", UT_NAMESIZE);
    27     utmp.ut_type = RUN_LVL;
    28     safe_strncpy(utmp.ut_id, "~~", sizeof(utmp.ut_id));
    29     safe_strncpy(utmp.ut_line, "~~", UT_LINESIZE);
    30     if (uname(&uts) == 0)
    31     safe_strncpy(utmp.ut_host, uts.release, sizeof(utmp.ut_host));
    32     updwtmp(bb_path_wtmp_file, &utmp);
    33    
    34     }
    35     #else
    36     #define write_wtmp() ((void)0)
    37 niro 532 #endif
    38 niro 816
    39     #ifndef RB_HALT_SYSTEM
    40     #define RB_HALT_SYSTEM RB_HALT
    41 niro 532 #endif
    42 niro 816
    43     #ifndef RB_POWER_OFF
    44     #define RB_POWER_OFF RB_POWERDOWN
    45     #endif
    46    
    47     int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    48     int halt_main(int argc UNUSED_PARAM, char **argv)
    49     {
    50     static const int magic[] = {
    51     RB_HALT_SYSTEM,
    52     RB_POWER_OFF,
    53     RB_AUTOBOOT
    54 niro 532 };
    55 niro 816 static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
    56 niro 532
    57 niro 816 int delay = 0;
    58     int which, flags, rc;
    59 niro 532
    60     /* Figure out which applet we're running */
    61 niro 816 for (which = 0; "hpr"[which] != applet_name[0]; which++)
    62     continue;
    63 niro 532
    64     /* Parse and handle arguments */
    65 niro 816 opt_complementary = "d+"; /* -d N */
    66     /* We support -w even if !ENABLE_FEATURE_WTMP, in order
    67     * to not break scripts */
    68     flags = getopt32(argv, "d:nfw", &delay);
    69 niro 532
    70 niro 816 sleep(delay);
    71    
    72     write_wtmp();
    73    
    74     if (flags & 8) /* -w */
    75     return EXIT_SUCCESS;
    76    
    77     if (!(flags & 2)) /* no -n */
    78     sync();
    79    
    80 niro 532 /* Perform action. */
    81 niro 816 rc = 1;
    82     if (!(flags & 4)) { /* no -f */
    83     //TODO: I tend to think that signalling linuxrc is wrong
    84     // pity original author didn't comment on it...
    85 niro 532 if (ENABLE_FEATURE_INITRD) {
    86     pid_t *pidlist = find_pid_by_name("linuxrc");
    87     if (pidlist[0] > 0)
    88     rc = kill(pidlist[0], signals[which]);
    89     if (ENABLE_FEATURE_CLEAN_UP)
    90     free(pidlist);
    91     }
    92     if (rc)
    93     rc = kill(1, signals[which]);
    94     } else
    95     rc = reboot(magic[which]);
    96    
    97     if (rc)
    98     bb_error_msg("no");
    99     return rc;
    100     }