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1/* 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 GPLv2, see file LICENSE in this source tree.
8 */
9
10//config:config HALT
11//config: bool "halt"
12//config: default y
13//config: help
14//config: Stop all processes and halt the system.
15//config:
16//config:config POWEROFF
17//config: bool "poweroff"
18//config: default y
19//config: help
20//config: Stop all processes and power off the system.
21//config:
22//config:config REBOOT
23//config: bool "reboot"
24//config: default y
25//config: help
26//config: Stop all processes and reboot the system.
27//config:
28//config:config FEATURE_CALL_TELINIT
29//config: bool "Call telinit on shutdown and reboot"
30//config: default y
31//config: depends on (HALT || POWEROFF || REBOOT) && !INIT
32//config: help
33//config: Call an external program (normally telinit) to facilitate
34//config: a switch to a proper runlevel.
35//config:
36//config: This option is only available if you selected halt and friends,
37//config: but did not select init.
38//config:
39//config:config TELINIT_PATH
40//config: string "Path to telinit executable"
41//config: default "/sbin/telinit"
42//config: depends on FEATURE_CALL_TELINIT
43//config: help
44//config: When busybox halt and friends have to call external telinit
45//config: to facilitate proper shutdown, this path is to be used when
46//config: locating telinit executable.
47
48//applet:IF_HALT(APPLET(halt, BB_DIR_SBIN, BB_SUID_DROP))
49//applet:IF_POWEROFF(APPLET_ODDNAME(poweroff, halt, BB_DIR_SBIN, BB_SUID_DROP, poweroff))
50//applet:IF_REBOOT(APPLET_ODDNAME(reboot, halt, BB_DIR_SBIN, BB_SUID_DROP, reboot))
51
52//kbuild:lib-$(CONFIG_HALT) += halt.o
53//kbuild:lib-$(CONFIG_POWEROFF) += halt.o
54//kbuild:lib-$(CONFIG_REBOOT) += halt.o
55
56//usage:#define halt_trivial_usage
57//usage: "[-d DELAY] [-n] [-f]" IF_FEATURE_WTMP(" [-w]")
58//usage:#define halt_full_usage "\n\n"
59//usage: "Halt the system\n"
60//usage: "\n -d SEC Delay interval"
61//usage: "\n -n Do not sync"
62//usage: "\n -f Force (don't go through init)"
63//usage: IF_FEATURE_WTMP(
64//usage: "\n -w Only write a wtmp record"
65//usage: )
66//usage:
67//usage:#define poweroff_trivial_usage
68//usage: "[-d DELAY] [-n] [-f]"
69//usage:#define poweroff_full_usage "\n\n"
70//usage: "Halt and shut off power\n"
71//usage: "\n -d SEC Delay interval"
72//usage: "\n -n Do not sync"
73//usage: "\n -f Force (don't go through init)"
74//usage:
75//usage:#define reboot_trivial_usage
76//usage: "[-d DELAY] [-n] [-f]"
77//usage:#define reboot_full_usage "\n\n"
78//usage: "Reboot the system\n"
79//usage: "\n -d SEC Delay interval"
80//usage: "\n -n Do not sync"
81//usage: "\n -f Force (don't go through init)"
82
83#include "libbb.h"
84#include "reboot.h"
85
86#ifdef __BIONIC__
87# include "android/reboot.c"
88#endif
89
90#if ENABLE_FEATURE_WTMP
91#include <sys/utsname.h>
92
93static void write_wtmp(void)
94{
95 struct utmpx utmp;
96 struct utsname uts;
97 /* "man utmp" says wtmp file should *not* be created automagically */
98 /*if (access(bb_path_wtmp_file, R_OK|W_OK) == -1) {
99 close(creat(bb_path_wtmp_file, 0664));
100 }*/
101 memset(&utmp, 0, sizeof(utmp));
102 utmp.ut_tv.tv_sec = time(NULL);
103 strcpy(utmp.ut_user, "shutdown"); /* it is wide enough */
104 utmp.ut_type = RUN_LVL;
105 utmp.ut_id[0] = '~'; utmp.ut_id[1] = '~'; /* = strcpy(utmp.ut_id, "~~"); */
106 utmp.ut_line[0] = '~'; utmp.ut_line[1] = '~'; /* = strcpy(utmp.ut_line, "~~"); */
107 uname(&uts);
108 safe_strncpy(utmp.ut_host, uts.release, sizeof(utmp.ut_host));
109 updwtmpx(bb_path_wtmp_file, &utmp);
110}
111#else
112#define write_wtmp() ((void)0)
113#endif
114
115
116int halt_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
117int halt_main(int argc UNUSED_PARAM, char **argv)
118{
119 static const int magic[] = {
120 RB_HALT_SYSTEM,
121 RB_POWER_OFF,
122 RB_AUTOBOOT
123 };
124 static const smallint signals[] = { SIGUSR1, SIGUSR2, SIGTERM };
125
126 int delay = 0;
127 int which, flags, rc;
128
129 /* Figure out which applet we're running */
130 if (ENABLE_HALT && !ENABLE_POWEROFF && !ENABLE_REBOOT)
131 which = 0;
132 else
133 if (!ENABLE_HALT && ENABLE_POWEROFF && !ENABLE_REBOOT)
134 which = 1;
135 else
136 if (!ENABLE_HALT && !ENABLE_POWEROFF && ENABLE_REBOOT)
137 which = 2;
138 else
139 for (which = 0; "hpr"[which] != applet_name[0]; which++)
140 continue;
141
142 /* Parse and handle arguments */
143 /* We support -w even if !ENABLE_FEATURE_WTMP,
144 * in order to not break scripts.
145 * -i (shut down network interfaces) is ignored.
146 */
147 flags = getopt32(argv, "d:+nfwi", &delay);
148
149 sleep(delay);
150
151 write_wtmp();
152
153 if (flags & 8) /* -w */
154 return EXIT_SUCCESS;
155
156 if (!(flags & 2)) /* no -n */
157 sync();
158
159#ifdef __BIONIC__
160 char *mode[4];
161 int c = 1;
162 mode[0] = strdup("reboot");
163 mode[1] = mode[2] = mode[3] = NULL;
164 switch (which) {
165 case 0:
166 case 1:
167 //-p for halt
168 mode[1] = strdup("-p");
169 c=2;
170 break;
171 case 2:
172 //reboot
173 #ifdef CYANOGEN_LIBREBOOT
174 if (argc > 1) {
175 mode[1] = strdup(argv[1]);
176 c = 2;
177 }
178 #endif
179 break;
180 }
181 return reboot_main(c, mode);
182#endif
183
184 /* Perform action. */
185 rc = 1;
186 if (!(flags & 4)) { /* no -f */
187//TODO: I tend to think that signalling linuxrc is wrong
188// pity original author didn't comment on it...
189 if (ENABLE_LINUXRC) {
190 /* talk to linuxrc */
191 /* bbox init/linuxrc assumed */
192 pid_t *pidlist = find_pid_by_name("linuxrc");
193 if (pidlist[0] > 0)
194 rc = kill(pidlist[0], signals[which]);
195 if (ENABLE_FEATURE_CLEAN_UP)
196 free(pidlist);
197 }
198 if (rc) {
199 /* talk to init */
200 if (!ENABLE_FEATURE_CALL_TELINIT) {
201 /* bbox init assumed */
202 rc = kill(1, signals[which]);
203 } else {
204 /* SysV style init assumed */
205 /* runlevels:
206 * 0 == shutdown
207 * 6 == reboot */
208 execlp(CONFIG_TELINIT_PATH,
209 CONFIG_TELINIT_PATH,
210 which == 2 ? "6" : "0",
211 (char *)NULL
212 );
213 bb_perror_msg_and_die("can't execute '%s'",
214 CONFIG_TELINIT_PATH);
215 }
216 }
217 } else {
218 rc = reboot(magic[which]);
219 }
220
221 if (rc)
222 bb_perror_nomsg_and_die();
223 return rc;
224}
225
generated by cgit at 2024-05-15 15:23:59 (GMT)