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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
b1b2a107 | 2 | /*** |
96b2fb93 | 3 | Copyright © 2010 ProFUSION embedded systems |
b1b2a107 FF |
4 | ***/ |
5 | ||
b1b2a107 | 6 | #include <errno.h> |
07630cea | 7 | #include <getopt.h> |
c01dcddf | 8 | #include <linux/reboot.h> |
b1b2a107 FF |
9 | #include <signal.h> |
10 | #include <stdbool.h> | |
11 | #include <stdlib.h> | |
07630cea LP |
12 | #include <sys/mman.h> |
13 | #include <sys/mount.h> | |
14 | #include <sys/reboot.h> | |
15 | #include <sys/stat.h> | |
16 | #include <unistd.h> | |
b1b2a107 | 17 | |
b5efdb8a | 18 | #include "alloc-util.h" |
d00c2631 | 19 | #include "async.h" |
07630cea LP |
20 | #include "cgroup-util.h" |
21 | #include "def.h" | |
89711996 | 22 | #include "exec-util.h" |
d00c2631 | 23 | #include "fd-util.h" |
ec26be51 | 24 | #include "fileio.h" |
07630cea LP |
25 | #include "killall.h" |
26 | #include "log.h" | |
27 | #include "missing.h" | |
6bedfcbb | 28 | #include "parse-util.h" |
07630cea | 29 | #include "process-util.h" |
c01dcddf | 30 | #include "reboot-util.h" |
73ad712f | 31 | #include "signal-util.h" |
07630cea LP |
32 | #include "string-util.h" |
33 | #include "switch-root.h" | |
34 | #include "terminal-util.h" | |
b1b2a107 FF |
35 | #include "umount.h" |
36 | #include "util.h" | |
b52aae1d | 37 | #include "virt.h" |
e96d6be7 | 38 | #include "watchdog.h" |
b1b2a107 | 39 | |
73ad712f KW |
40 | #define SYNC_PROGRESS_ATTEMPTS 3 |
41 | #define SYNC_TIMEOUT_USEC (10*USEC_PER_SEC) | |
42 | ||
b1e90ec5 | 43 | static char* arg_verb; |
287419c1 | 44 | static uint8_t arg_exit_code; |
e73c54b8 | 45 | static usec_t arg_timeout = DEFAULT_TIMEOUT_USEC; |
b1e90ec5 ZJS |
46 | |
47 | static int parse_argv(int argc, char *argv[]) { | |
48 | enum { | |
49 | ARG_LOG_LEVEL = 0x100, | |
50 | ARG_LOG_TARGET, | |
51 | ARG_LOG_COLOR, | |
52 | ARG_LOG_LOCATION, | |
287419c1 | 53 | ARG_EXIT_CODE, |
e73c54b8 | 54 | ARG_TIMEOUT, |
b1e90ec5 ZJS |
55 | }; |
56 | ||
57 | static const struct option options[] = { | |
58 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, | |
59 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
60 | { "log-color", optional_argument, NULL, ARG_LOG_COLOR }, | |
61 | { "log-location", optional_argument, NULL, ARG_LOG_LOCATION }, | |
287419c1 | 62 | { "exit-code", required_argument, NULL, ARG_EXIT_CODE }, |
e73c54b8 | 63 | { "timeout", required_argument, NULL, ARG_TIMEOUT }, |
b1e90ec5 ZJS |
64 | {} |
65 | }; | |
66 | ||
67 | int c, r; | |
68 | ||
69 | assert(argc >= 1); | |
70 | assert(argv); | |
71 | ||
4b5d8d0f MS |
72 | /* "-" prevents getopt from permuting argv[] and moving the verb away |
73 | * from argv[1]. Our interface to initrd promises it'll be there. */ | |
74 | while ((c = getopt_long(argc, argv, "-", options, NULL)) >= 0) | |
b1e90ec5 ZJS |
75 | switch (c) { |
76 | ||
77 | case ARG_LOG_LEVEL: | |
78 | r = log_set_max_level_from_string(optarg); | |
79 | if (r < 0) | |
d405394c | 80 | log_error_errno(r, "Failed to parse log level %s, ignoring.", optarg); |
b1e90ec5 ZJS |
81 | |
82 | break; | |
83 | ||
84 | case ARG_LOG_TARGET: | |
85 | r = log_set_target_from_string(optarg); | |
86 | if (r < 0) | |
d405394c | 87 | log_error_errno(r, "Failed to parse log target %s, ignoring", optarg); |
b1e90ec5 ZJS |
88 | |
89 | break; | |
90 | ||
91 | case ARG_LOG_COLOR: | |
92 | ||
93 | if (optarg) { | |
94 | r = log_show_color_from_string(optarg); | |
95 | if (r < 0) | |
d405394c | 96 | log_error_errno(r, "Failed to parse log color setting %s, ignoring", optarg); |
b1e90ec5 ZJS |
97 | } else |
98 | log_show_color(true); | |
99 | ||
100 | break; | |
101 | ||
102 | case ARG_LOG_LOCATION: | |
103 | if (optarg) { | |
104 | r = log_show_location_from_string(optarg); | |
105 | if (r < 0) | |
d405394c | 106 | log_error_errno(r, "Failed to parse log location setting %s, ignoring", optarg); |
b1e90ec5 ZJS |
107 | } else |
108 | log_show_location(true); | |
109 | ||
110 | break; | |
111 | ||
287419c1 AC |
112 | case ARG_EXIT_CODE: |
113 | r = safe_atou8(optarg, &arg_exit_code); | |
114 | if (r < 0) | |
d405394c | 115 | log_error_errno(r, "Failed to parse exit code %s, ignoring", optarg); |
287419c1 AC |
116 | |
117 | break; | |
118 | ||
e73c54b8 JK |
119 | case ARG_TIMEOUT: |
120 | r = parse_sec(optarg, &arg_timeout); | |
121 | if (r < 0) | |
d405394c | 122 | log_error_errno(r, "Failed to parse shutdown timeout %s, ignoring", optarg); |
e73c54b8 JK |
123 | |
124 | break; | |
125 | ||
4b5d8d0f MS |
126 | case '\001': |
127 | if (!arg_verb) | |
128 | arg_verb = optarg; | |
129 | else | |
130 | log_error("Excess arguments, ignoring"); | |
131 | break; | |
132 | ||
b1e90ec5 | 133 | case '?': |
b1e90ec5 ZJS |
134 | return -EINVAL; |
135 | ||
136 | default: | |
137 | assert_not_reached("Unhandled option code."); | |
138 | } | |
139 | ||
4b5d8d0f | 140 | if (!arg_verb) { |
b1e90ec5 ZJS |
141 | log_error("Verb argument missing."); |
142 | return -EINVAL; | |
143 | } | |
144 | ||
b1e90ec5 ZJS |
145 | return 0; |
146 | } | |
147 | ||
5a4bf02f | 148 | static int switch_root_initramfs(void) { |
4a62c710 MS |
149 | if (mount("/run/initramfs", "/run/initramfs", NULL, MS_BIND, NULL) < 0) |
150 | return log_error_errno(errno, "Failed to mount bind /run/initramfs on /run/initramfs: %m"); | |
89d471d5 | 151 | |
4a62c710 MS |
152 | if (mount(NULL, "/run/initramfs", NULL, MS_PRIVATE, NULL) < 0) |
153 | return log_error_errno(errno, "Failed to make /run/initramfs private mount: %m"); | |
89d471d5 | 154 | |
f131770b | 155 | /* switch_root with MS_BIND, because there might still be processes lurking around, which have open file descriptors. |
5a4bf02f HH |
156 | * /run/initramfs/shutdown will take care of these. |
157 | * Also do not detach the old root, because /run/initramfs/shutdown needs to access it. | |
158 | */ | |
159 | return switch_root("/run/initramfs", "/oldroot", false, MS_BIND); | |
7cb1094a HH |
160 | } |
161 | ||
73ad712f KW |
162 | /* Read the following fields from /proc/meminfo: |
163 | * | |
164 | * NFS_Unstable | |
165 | * Writeback | |
166 | * Dirty | |
167 | * | |
168 | * Return true if the sum of these fields is greater than the previous | |
169 | * value input. For all other issues, report the failure and indicate that | |
170 | * the sync is not making progress. | |
171 | */ | |
172 | static bool sync_making_progress(unsigned long long *prev_dirty) { | |
173 | _cleanup_fclose_ FILE *f = NULL; | |
174 | char line[LINE_MAX]; | |
175 | bool r = false; | |
176 | unsigned long long val = 0; | |
177 | ||
178 | f = fopen("/proc/meminfo", "re"); | |
179 | if (!f) | |
180 | return log_warning_errno(errno, "Failed to open /proc/meminfo: %m"); | |
181 | ||
182 | FOREACH_LINE(line, f, log_warning_errno(errno, "Failed to parse /proc/meminfo: %m")) { | |
183 | unsigned long long ull = 0; | |
184 | ||
185 | if (!first_word(line, "NFS_Unstable:") && !first_word(line, "Writeback:") && !first_word(line, "Dirty:")) | |
186 | continue; | |
187 | ||
188 | errno = 0; | |
189 | if (sscanf(line, "%*s %llu %*s", &ull) != 1) { | |
190 | if (errno != 0) | |
191 | log_warning_errno(errno, "Failed to parse /proc/meminfo: %m"); | |
192 | else | |
193 | log_warning("Failed to parse /proc/meminfo"); | |
194 | ||
195 | return false; | |
196 | } | |
197 | ||
198 | val += ull; | |
199 | } | |
200 | ||
201 | r = *prev_dirty > val; | |
202 | ||
203 | *prev_dirty = val; | |
204 | ||
205 | return r; | |
206 | } | |
207 | ||
208 | static void sync_with_progress(void) { | |
d00c2631 | 209 | unsigned long long dirty = ULONG_LONG_MAX; |
73ad712f KW |
210 | unsigned checks; |
211 | pid_t pid; | |
212 | int r; | |
73ad712f KW |
213 | |
214 | BLOCK_SIGNALS(SIGCHLD); | |
215 | ||
d00c2631 LP |
216 | /* Due to the possiblity of the sync operation hanging, we fork a child process and monitor the progress. If |
217 | * the timeout lapses, the assumption is that that particular sync stalled. */ | |
218 | ||
219 | r = asynchronous_sync(&pid); | |
4c253ed1 | 220 | if (r < 0) { |
d00c2631 | 221 | log_error_errno(r, "Failed to fork sync(): %m"); |
73ad712f KW |
222 | return; |
223 | } | |
73ad712f KW |
224 | |
225 | log_info("Syncing filesystems and block devices."); | |
226 | ||
227 | /* Start monitoring the sync operation. If more than | |
228 | * SYNC_PROGRESS_ATTEMPTS lapse without progress being made, | |
229 | * we assume that the sync is stalled */ | |
230 | for (checks = 0; checks < SYNC_PROGRESS_ATTEMPTS; checks++) { | |
231 | r = wait_for_terminate_with_timeout(pid, SYNC_TIMEOUT_USEC); | |
232 | if (r == 0) | |
233 | /* Sync finished without error. | |
234 | * (The sync itself does not return an error code) */ | |
235 | return; | |
236 | else if (r == -ETIMEDOUT) { | |
237 | /* Reset the check counter if the "Dirty" value is | |
238 | * decreasing */ | |
239 | if (sync_making_progress(&dirty)) | |
240 | checks = 0; | |
241 | } else { | |
242 | log_error_errno(r, "Failed to sync filesystems and block devices: %m"); | |
243 | return; | |
244 | } | |
245 | } | |
246 | ||
247 | /* Only reached in the event of a timeout. We should issue a kill | |
248 | * to the stray process. */ | |
249 | log_error("Syncing filesystems and block devices - timed out, issuing SIGKILL to PID "PID_FMT".", pid); | |
250 | (void) kill(pid, SIGKILL); | |
251 | } | |
252 | ||
b1b2a107 | 253 | int main(int argc, char *argv[]) { |
8c977838 | 254 | bool need_umount, need_swapoff, need_loop_detach, need_dm_detach; |
456b2199 | 255 | bool in_container, use_watchdog = false, can_initrd; |
06beed6d | 256 | _cleanup_free_ char *cgroup = NULL; |
6edd7d0a | 257 | char *arguments[3]; |
456b2199 | 258 | int cmd, r, umount_log_level = LOG_INFO; |
e801700e | 259 | static const char* const dirs[] = {SYSTEM_SHUTDOWN_PATH, NULL}; |
8a2c1fbf | 260 | char *watchdog_device; |
b1b2a107 | 261 | |
e18805fb LP |
262 | /* The log target defaults to console, but the original systemd process will pass its log target in through a |
263 | * command line argument, which will override this default. Also, ensure we'll never log to the journal or | |
264 | * syslog, as these logging daemons are either already dead or will die very soon. */ | |
265 | ||
266 | log_set_target(LOG_TARGET_CONSOLE); | |
267 | log_set_prohibit_ipc(true); | |
b1e90ec5 | 268 | log_parse_environment(); |
e18805fb | 269 | |
b1e90ec5 ZJS |
270 | r = parse_argv(argc, argv); |
271 | if (r < 0) | |
272 | goto error; | |
ec26be51 | 273 | |
b1b2a107 FF |
274 | log_open(); |
275 | ||
4c12626c LP |
276 | umask(0022); |
277 | ||
df0ff127 | 278 | if (getpid_cached() != 1) { |
b1e90ec5 | 279 | log_error("Not executed by init (PID 1)."); |
b1b2a107 FF |
280 | r = -EPERM; |
281 | goto error; | |
282 | } | |
283 | ||
b1e90ec5 | 284 | if (streq(arg_verb, "reboot")) |
b1b2a107 | 285 | cmd = RB_AUTOBOOT; |
b1e90ec5 | 286 | else if (streq(arg_verb, "poweroff")) |
b1b2a107 | 287 | cmd = RB_POWER_OFF; |
b1e90ec5 | 288 | else if (streq(arg_verb, "halt")) |
b1b2a107 | 289 | cmd = RB_HALT_SYSTEM; |
b1e90ec5 | 290 | else if (streq(arg_verb, "kexec")) |
b1b2a107 | 291 | cmd = LINUX_REBOOT_CMD_KEXEC; |
287419c1 AC |
292 | else if (streq(arg_verb, "exit")) |
293 | cmd = 0; /* ignored, just checking that arg_verb is valid */ | |
b1b2a107 | 294 | else { |
b1e90ec5 | 295 | log_error("Unknown action '%s'.", arg_verb); |
e18805fb | 296 | r = -EINVAL; |
b1b2a107 FF |
297 | goto error; |
298 | } | |
299 | ||
0b9aa270 | 300 | (void) cg_get_root_path(&cgroup); |
2e79d182 | 301 | in_container = detect_container() > 0; |
41f85451 | 302 | |
5d904a6a | 303 | use_watchdog = getenv("WATCHDOG_USEC"); |
8a2c1fbf EJ |
304 | watchdog_device = getenv("WATCHDOG_DEVICE"); |
305 | if (watchdog_device) { | |
306 | r = watchdog_set_device(watchdog_device); | |
307 | if (r < 0) | |
308 | log_warning_errno(r, "Failed to set watchdog device to %s, ignoring: %m", | |
309 | watchdog_device); | |
310 | } | |
e96d6be7 | 311 | |
2e79d182 | 312 | /* Lock us into memory */ |
e18805fb | 313 | (void) mlockall(MCL_CURRENT|MCL_FUTURE); |
b1b2a107 | 314 | |
2e79d182 LP |
315 | /* Synchronize everything that is not written to disk yet at this point already. This is a good idea so that |
316 | * slow IO is processed here already and the final process killing spree is not impacted by processes | |
73ad712f KW |
317 | * desperately trying to sync IO to disk within their timeout. Do not remove this sync, data corruption will |
318 | * result. */ | |
2e79d182 | 319 | if (!in_container) |
73ad712f | 320 | sync_with_progress(); |
2e79d182 | 321 | |
e557b1a6 | 322 | disable_coredumps(); |
27b372c1 | 323 | |
ab58e291 | 324 | log_info("Sending SIGTERM to remaining processes..."); |
e73c54b8 | 325 | broadcast_signal(SIGTERM, true, true, arg_timeout); |
b1b2a107 | 326 | |
ab58e291 | 327 | log_info("Sending SIGKILL to remaining processes..."); |
e73c54b8 | 328 | broadcast_signal(SIGKILL, true, false, arg_timeout); |
40e85d00 | 329 | |
d89b5fed | 330 | need_umount = !in_container; |
8c977838 ZJS |
331 | need_swapoff = !in_container; |
332 | need_loop_detach = !in_container; | |
333 | need_dm_detach = !in_container; | |
456b2199 | 334 | can_initrd = !in_container && !in_initrd() && access("/run/initramfs/shutdown", X_OK) == 0; |
b1b2a107 | 335 | |
567ea02a | 336 | /* Unmount all mountpoints, swaps, and loopback devices */ |
ac9cea5b | 337 | for (;;) { |
12aad1d0 LP |
338 | bool changed = false; |
339 | ||
e96d6be7 LP |
340 | if (use_watchdog) |
341 | watchdog_ping(); | |
342 | ||
41f85451 LP |
343 | /* Let's trim the cgroup tree on each iteration so |
344 | that we leave an empty cgroup tree around, so that | |
345 | container managers get a nice notify event when we | |
346 | are down */ | |
347 | if (cgroup) | |
348 | cg_trim(SYSTEMD_CGROUP_CONTROLLER, cgroup, false); | |
349 | ||
b1b2a107 | 350 | if (need_umount) { |
ab58e291 | 351 | log_info("Unmounting file systems."); |
456b2199 | 352 | r = umount_all(&changed, umount_log_level); |
bce93b7a | 353 | if (r == 0) { |
b1b2a107 | 354 | need_umount = false; |
bce93b7a MS |
355 | log_info("All filesystems unmounted."); |
356 | } else if (r > 0) | |
ab58e291 | 357 | log_info("Not all file systems unmounted, %d left.", r); |
b1b2a107 | 358 | else |
da927ba9 | 359 | log_error_errno(r, "Failed to unmount file systems: %m"); |
b1b2a107 FF |
360 | } |
361 | ||
362 | if (need_swapoff) { | |
735e0712 | 363 | log_info("Deactivating swaps."); |
12aad1d0 | 364 | r = swapoff_all(&changed); |
bce93b7a | 365 | if (r == 0) { |
b1b2a107 | 366 | need_swapoff = false; |
735e0712 | 367 | log_info("All swaps deactivated."); |
bce93b7a | 368 | } else if (r > 0) |
735e0712 | 369 | log_info("Not all swaps deactivated, %d left.", r); |
b1b2a107 | 370 | else |
da927ba9 | 371 | log_error_errno(r, "Failed to deactivate swaps: %m"); |
b1b2a107 FF |
372 | } |
373 | ||
374 | if (need_loop_detach) { | |
375 | log_info("Detaching loop devices."); | |
456b2199 | 376 | r = loopback_detach_all(&changed, umount_log_level); |
bce93b7a | 377 | if (r == 0) { |
b1b2a107 | 378 | need_loop_detach = false; |
bce93b7a MS |
379 | log_info("All loop devices detached."); |
380 | } else if (r > 0) | |
ab58e291 | 381 | log_info("Not all loop devices detached, %d left.", r); |
b1b2a107 | 382 | else |
da927ba9 | 383 | log_error_errno(r, "Failed to detach loop devices: %m"); |
d48141ba | 384 | } |
b1b2a107 | 385 | |
d48141ba LP |
386 | if (need_dm_detach) { |
387 | log_info("Detaching DM devices."); | |
456b2199 | 388 | r = dm_detach_all(&changed, umount_log_level); |
bce93b7a | 389 | if (r == 0) { |
d48141ba | 390 | need_dm_detach = false; |
bce93b7a MS |
391 | log_info("All DM devices detached."); |
392 | } else if (r > 0) | |
2569a5ce | 393 | log_info("Not all DM devices detached, %d left.", r); |
d48141ba | 394 | else |
da927ba9 | 395 | log_error_errno(r, "Failed to detach DM devices: %m"); |
b1b2a107 FF |
396 | } |
397 | ||
a27d2184 | 398 | if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) { |
ac9cea5b | 399 | log_info("All filesystems, swaps, loop devices and DM devices detached."); |
12aad1d0 | 400 | /* Yay, done */ |
ac9cea5b | 401 | break; |
a27d2184 | 402 | } |
b1b2a107 | 403 | |
456b2199 JJ |
404 | if (!changed && umount_log_level == LOG_INFO && !can_initrd) { |
405 | /* There are things we cannot get rid of. Loop one more time | |
406 | * with LOG_ERR to inform the user. Note that we don't need | |
407 | * to do this if there is a initrd to switch to, because that | |
408 | * one is likely to get rid of the remounting mounts. If not, | |
409 | * it will log about them. */ | |
410 | umount_log_level = LOG_ERR; | |
411 | continue; | |
412 | } | |
413 | ||
12aad1d0 | 414 | /* If in this iteration we didn't manage to |
bd3fa1d2 | 415 | * unmount/deactivate anything, we simply give up */ |
12aad1d0 | 416 | if (!changed) { |
8c977838 ZJS |
417 | log_info("Cannot finalize remaining%s%s%s%s continuing.", |
418 | need_umount ? " file systems," : "", | |
419 | need_swapoff ? " swap devices," : "", | |
420 | need_loop_detach ? " loop devices," : "", | |
421 | need_dm_detach ? " DM devices," : ""); | |
ac9cea5b | 422 | break; |
12aad1d0 LP |
423 | } |
424 | ||
ac9cea5b | 425 | log_debug("Couldn't finalize remaining %s%s%s%s trying again.", |
8c977838 ZJS |
426 | need_umount ? " file systems," : "", |
427 | need_swapoff ? " swap devices," : "", | |
428 | need_loop_detach ? " loop devices," : "", | |
429 | need_dm_detach ? " DM devices," : ""); | |
b1b2a107 FF |
430 | } |
431 | ||
8a2c1fbf EJ |
432 | /* We're done with the watchdog. */ |
433 | watchdog_free_device(); | |
434 | ||
6edd7d0a | 435 | arguments[0] = NULL; |
b1e90ec5 | 436 | arguments[1] = arg_verb; |
6edd7d0a | 437 | arguments[2] = NULL; |
c6e47247 | 438 | execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments); |
83cc030f | 439 | |
456b2199 | 440 | if (can_initrd) { |
5a4bf02f HH |
441 | r = switch_root_initramfs(); |
442 | if (r >= 0) { | |
a2726e5c | 443 | argv[0] = (char*) "/shutdown"; |
30d743f4 | 444 | |
5a4bf02f HH |
445 | setsid(); |
446 | make_console_stdio(); | |
447 | ||
448 | log_info("Successfully changed into root pivot.\n" | |
449 | "Returning to initrd..."); | |
30d743f4 | 450 | |
a2726e5c | 451 | execv("/shutdown", argv); |
56f64d95 | 452 | log_error_errno(errno, "Failed to execute shutdown binary: %m"); |
5a4bf02f | 453 | } else |
da927ba9 | 454 | log_error_errno(r, "Failed to switch root to \"/run/initramfs\": %m"); |
5a4bf02f | 455 | |
7cb1094a HH |
456 | } |
457 | ||
8c977838 ZJS |
458 | if (need_umount || need_swapoff || need_loop_detach || need_dm_detach) |
459 | log_error("Failed to finalize %s%s%s%s ignoring", | |
460 | need_umount ? " file systems," : "", | |
461 | need_swapoff ? " swap devices," : "", | |
462 | need_loop_detach ? " loop devices," : "", | |
463 | need_dm_detach ? " DM devices," : ""); | |
464 | ||
2e79d182 LP |
465 | /* The kernel will automatically flush ATA disks and suchlike on reboot(), but the file systems need to be |
466 | * sync'ed explicitly in advance. So let's do this here, but not needlessly slow down containers. Note that we | |
467 | * sync'ed things already once above, but we did some more work since then which might have caused IO, hence | |
73ad712f | 468 | * let's do it once more. Do not remove this sync, data corruption will result. */ |
0049f05a | 469 | if (!in_container) |
73ad712f | 470 | sync_with_progress(); |
0049f05a | 471 | |
287419c1 AC |
472 | if (streq(arg_verb, "exit")) { |
473 | if (in_container) | |
1f409a0c LP |
474 | return arg_exit_code; |
475 | ||
476 | cmd = RB_POWER_OFF; /* We cannot exit() on the host, fallback on another method. */ | |
287419c1 AC |
477 | } |
478 | ||
477def80 LP |
479 | switch (cmd) { |
480 | ||
481 | case LINUX_REBOOT_CMD_KEXEC: | |
cb7ec564 LP |
482 | |
483 | if (!in_container) { | |
484 | /* We cheat and exec kexec to avoid doing all its work */ | |
477def80 | 485 | log_info("Rebooting with kexec."); |
cb7ec564 | 486 | |
1f5d1e02 | 487 | r = safe_fork("(sd-kexec)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_LOG|FORK_WAIT, NULL); |
4c253ed1 | 488 | if (r == 0) { |
477def80 LP |
489 | const char * const args[] = { |
490 | KEXEC, "-e", NULL | |
491 | }; | |
492 | ||
cb7ec564 | 493 | /* Child */ |
477def80 | 494 | |
cb7ec564 | 495 | execv(args[0], (char * const *) args); |
477def80 | 496 | _exit(EXIT_FAILURE); |
4c253ed1 LP |
497 | } |
498 | ||
1f5d1e02 | 499 | /* If we are still running, then the kexec can't have worked, let's fall through */ |
b1b2a107 | 500 | } |
e61cd186 LP |
501 | |
502 | cmd = RB_AUTOBOOT; | |
4831981d | 503 | _fallthrough_; |
477def80 | 504 | |
c01dcddf LP |
505 | case RB_AUTOBOOT: |
506 | (void) reboot_with_parameter(REBOOT_LOG); | |
477def80 LP |
507 | log_info("Rebooting."); |
508 | break; | |
509 | ||
510 | case RB_POWER_OFF: | |
511 | log_info("Powering off."); | |
512 | break; | |
513 | ||
514 | case RB_HALT_SYSTEM: | |
515 | log_info("Halting system."); | |
516 | break; | |
517 | ||
518 | default: | |
519 | assert_not_reached("Unknown magic"); | |
520 | } | |
cb7ec564 | 521 | |
118cf952 | 522 | (void) reboot(cmd); |
cb7ec564 LP |
523 | if (errno == EPERM && in_container) { |
524 | /* If we are in a container, and we lacked | |
525 | * CAP_SYS_BOOT just exit, this will kill our | |
526 | * container for good. */ | |
477def80 | 527 | log_info("Exiting container."); |
1f409a0c | 528 | return EXIT_SUCCESS; |
cb7ec564 LP |
529 | } |
530 | ||
76ef789d | 531 | r = log_error_errno(errno, "Failed to invoke reboot(): %m"); |
b1b2a107 FF |
532 | |
533 | error: | |
da927ba9 | 534 | log_emergency_errno(r, "Critical error while doing system shutdown: %m"); |
b1b2a107 | 535 | freeze(); |
b1b2a107 | 536 | } |