Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | /* vi: set sw=4 ts=4: */ /* * Poweroff reboot and halt, oh my. * * Copyright 2006 by Rob Landley <rob@landley.net> * * 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 "reboot.h" #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[] = { RB_HALT_SYSTEM, RB_POWER_OFF, RB_AUTOBOOT }; static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM }; int delay = 0; int which, flags, rc; /* Figure out which applet we're running */ for (which = 0; "hpr"[which] != applet_name[0]; which++) continue; /* Parse and handle arguments */ 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. */ 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) 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 */ rc = execlp(CONFIG_TELINIT_PATH, CONFIG_TELINIT_PATH, which == 2 ? "6" : "0", (char *)NULL ); } } } else { rc = reboot(magic[which]); } if (rc) bb_perror_nomsg_and_die(); return rc; } |