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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
b1b2a107 FF |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 ProFUSION embedded systems | |
b1b2a107 FF |
6 | ***/ |
7 | ||
b1b2a107 | 8 | #include <errno.h> |
07630cea | 9 | #include <getopt.h> |
c01dcddf | 10 | #include <linux/reboot.h> |
b1b2a107 FF |
11 | #include <signal.h> |
12 | #include <stdbool.h> | |
13 | #include <stdlib.h> | |
07630cea LP |
14 | #include <sys/mman.h> |
15 | #include <sys/mount.h> | |
16 | #include <sys/reboot.h> | |
17 | #include <sys/stat.h> | |
18 | #include <unistd.h> | |
b1b2a107 | 19 | |
b5efdb8a | 20 | #include "alloc-util.h" |
d00c2631 | 21 | #include "async.h" |
07630cea LP |
22 | #include "cgroup-util.h" |
23 | #include "def.h" | |
89711996 | 24 | #include "exec-util.h" |
d00c2631 | 25 | #include "fd-util.h" |
ec26be51 | 26 | #include "fileio.h" |
07630cea LP |
27 | #include "killall.h" |
28 | #include "log.h" | |
29 | #include "missing.h" | |
6bedfcbb | 30 | #include "parse-util.h" |
07630cea | 31 | #include "process-util.h" |
c01dcddf | 32 | #include "reboot-util.h" |
73ad712f | 33 | #include "signal-util.h" |
07630cea LP |
34 | #include "string-util.h" |
35 | #include "switch-root.h" | |
36 | #include "terminal-util.h" | |
b1b2a107 FF |
37 | #include "umount.h" |
38 | #include "util.h" | |
b52aae1d | 39 | #include "virt.h" |
e96d6be7 | 40 | #include "watchdog.h" |
b1b2a107 | 41 | |
73ad712f KW |
42 | #define SYNC_PROGRESS_ATTEMPTS 3 |
43 | #define SYNC_TIMEOUT_USEC (10*USEC_PER_SEC) | |
44 | ||
b1e90ec5 | 45 | static char* arg_verb; |
287419c1 | 46 | static uint8_t arg_exit_code; |
e73c54b8 | 47 | static usec_t arg_timeout = DEFAULT_TIMEOUT_USEC; |
b1e90ec5 ZJS |
48 | |
49 | static int parse_argv(int argc, char *argv[]) { | |
50 | enum { | |
51 | ARG_LOG_LEVEL = 0x100, | |
52 | ARG_LOG_TARGET, | |
53 | ARG_LOG_COLOR, | |
54 | ARG_LOG_LOCATION, | |
287419c1 | 55 | ARG_EXIT_CODE, |
e73c54b8 | 56 | ARG_TIMEOUT, |
b1e90ec5 ZJS |
57 | }; |
58 | ||
59 | static const struct option options[] = { | |
60 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, | |
61 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
62 | { "log-color", optional_argument, NULL, ARG_LOG_COLOR }, | |
63 | { "log-location", optional_argument, NULL, ARG_LOG_LOCATION }, | |
287419c1 | 64 | { "exit-code", required_argument, NULL, ARG_EXIT_CODE }, |
e73c54b8 | 65 | { "timeout", required_argument, NULL, ARG_TIMEOUT }, |
b1e90ec5 ZJS |
66 | {} |
67 | }; | |
68 | ||
69 | int c, r; | |
70 | ||
71 | assert(argc >= 1); | |
72 | assert(argv); | |
73 | ||
4b5d8d0f MS |
74 | /* "-" prevents getopt from permuting argv[] and moving the verb away |
75 | * from argv[1]. Our interface to initrd promises it'll be there. */ | |
76 | while ((c = getopt_long(argc, argv, "-", options, NULL)) >= 0) | |
b1e90ec5 ZJS |
77 | switch (c) { |
78 | ||
79 | case ARG_LOG_LEVEL: | |
80 | r = log_set_max_level_from_string(optarg); | |
81 | if (r < 0) | |
d405394c | 82 | log_error_errno(r, "Failed to parse log level %s, ignoring.", optarg); |
b1e90ec5 ZJS |
83 | |
84 | break; | |
85 | ||
86 | case ARG_LOG_TARGET: | |
87 | r = log_set_target_from_string(optarg); | |
88 | if (r < 0) | |
d405394c | 89 | log_error_errno(r, "Failed to parse log target %s, ignoring", optarg); |
b1e90ec5 ZJS |
90 | |
91 | break; | |
92 | ||
93 | case ARG_LOG_COLOR: | |
94 | ||
95 | if (optarg) { | |
96 | r = log_show_color_from_string(optarg); | |
97 | if (r < 0) | |
d405394c | 98 | log_error_errno(r, "Failed to parse log color setting %s, ignoring", optarg); |
b1e90ec5 ZJS |
99 | } else |
100 | log_show_color(true); | |
101 | ||
102 | break; | |
103 | ||
104 | case ARG_LOG_LOCATION: | |
105 | if (optarg) { | |
106 | r = log_show_location_from_string(optarg); | |
107 | if (r < 0) | |
d405394c | 108 | log_error_errno(r, "Failed to parse log location setting %s, ignoring", optarg); |
b1e90ec5 ZJS |
109 | } else |
110 | log_show_location(true); | |
111 | ||
112 | break; | |
113 | ||
287419c1 AC |
114 | case ARG_EXIT_CODE: |
115 | r = safe_atou8(optarg, &arg_exit_code); | |
116 | if (r < 0) | |
d405394c | 117 | log_error_errno(r, "Failed to parse exit code %s, ignoring", optarg); |
287419c1 AC |
118 | |
119 | break; | |
120 | ||
e73c54b8 JK |
121 | case ARG_TIMEOUT: |
122 | r = parse_sec(optarg, &arg_timeout); | |
123 | if (r < 0) | |
d405394c | 124 | log_error_errno(r, "Failed to parse shutdown timeout %s, ignoring", optarg); |
e73c54b8 JK |
125 | |
126 | break; | |
127 | ||
4b5d8d0f MS |
128 | case '\001': |
129 | if (!arg_verb) | |
130 | arg_verb = optarg; | |
131 | else | |
132 | log_error("Excess arguments, ignoring"); | |
133 | break; | |
134 | ||
b1e90ec5 | 135 | case '?': |
b1e90ec5 ZJS |
136 | return -EINVAL; |
137 | ||
138 | default: | |
139 | assert_not_reached("Unhandled option code."); | |
140 | } | |
141 | ||
4b5d8d0f | 142 | if (!arg_verb) { |
b1e90ec5 ZJS |
143 | log_error("Verb argument missing."); |
144 | return -EINVAL; | |
145 | } | |
146 | ||
b1e90ec5 ZJS |
147 | return 0; |
148 | } | |
149 | ||
5a4bf02f | 150 | static int switch_root_initramfs(void) { |
4a62c710 MS |
151 | if (mount("/run/initramfs", "/run/initramfs", NULL, MS_BIND, NULL) < 0) |
152 | return log_error_errno(errno, "Failed to mount bind /run/initramfs on /run/initramfs: %m"); | |
89d471d5 | 153 | |
4a62c710 MS |
154 | if (mount(NULL, "/run/initramfs", NULL, MS_PRIVATE, NULL) < 0) |
155 | return log_error_errno(errno, "Failed to make /run/initramfs private mount: %m"); | |
89d471d5 | 156 | |
f131770b | 157 | /* switch_root with MS_BIND, because there might still be processes lurking around, which have open file descriptors. |
5a4bf02f HH |
158 | * /run/initramfs/shutdown will take care of these. |
159 | * Also do not detach the old root, because /run/initramfs/shutdown needs to access it. | |
160 | */ | |
161 | return switch_root("/run/initramfs", "/oldroot", false, MS_BIND); | |
7cb1094a HH |
162 | } |
163 | ||
73ad712f KW |
164 | /* Read the following fields from /proc/meminfo: |
165 | * | |
166 | * NFS_Unstable | |
167 | * Writeback | |
168 | * Dirty | |
169 | * | |
170 | * Return true if the sum of these fields is greater than the previous | |
171 | * value input. For all other issues, report the failure and indicate that | |
172 | * the sync is not making progress. | |
173 | */ | |
174 | static bool sync_making_progress(unsigned long long *prev_dirty) { | |
175 | _cleanup_fclose_ FILE *f = NULL; | |
176 | char line[LINE_MAX]; | |
177 | bool r = false; | |
178 | unsigned long long val = 0; | |
179 | ||
180 | f = fopen("/proc/meminfo", "re"); | |
181 | if (!f) | |
182 | return log_warning_errno(errno, "Failed to open /proc/meminfo: %m"); | |
183 | ||
184 | FOREACH_LINE(line, f, log_warning_errno(errno, "Failed to parse /proc/meminfo: %m")) { | |
185 | unsigned long long ull = 0; | |
186 | ||
187 | if (!first_word(line, "NFS_Unstable:") && !first_word(line, "Writeback:") && !first_word(line, "Dirty:")) | |
188 | continue; | |
189 | ||
190 | errno = 0; | |
191 | if (sscanf(line, "%*s %llu %*s", &ull) != 1) { | |
192 | if (errno != 0) | |
193 | log_warning_errno(errno, "Failed to parse /proc/meminfo: %m"); | |
194 | else | |
195 | log_warning("Failed to parse /proc/meminfo"); | |
196 | ||
197 | return false; | |
198 | } | |
199 | ||
200 | val += ull; | |
201 | } | |
202 | ||
203 | r = *prev_dirty > val; | |
204 | ||
205 | *prev_dirty = val; | |
206 | ||
207 | return r; | |
208 | } | |
209 | ||
210 | static void sync_with_progress(void) { | |
d00c2631 | 211 | unsigned long long dirty = ULONG_LONG_MAX; |
73ad712f KW |
212 | unsigned checks; |
213 | pid_t pid; | |
214 | int r; | |
73ad712f KW |
215 | |
216 | BLOCK_SIGNALS(SIGCHLD); | |
217 | ||
d00c2631 LP |
218 | /* Due to the possiblity of the sync operation hanging, we fork a child process and monitor the progress. If |
219 | * the timeout lapses, the assumption is that that particular sync stalled. */ | |
220 | ||
221 | r = asynchronous_sync(&pid); | |
4c253ed1 | 222 | if (r < 0) { |
d00c2631 | 223 | log_error_errno(r, "Failed to fork sync(): %m"); |
73ad712f KW |
224 | return; |
225 | } | |
73ad712f KW |
226 | |
227 | log_info("Syncing filesystems and block devices."); | |
228 | ||
229 | /* Start monitoring the sync operation. If more than | |
230 | * SYNC_PROGRESS_ATTEMPTS lapse without progress being made, | |
231 | * we assume that the sync is stalled */ | |
232 | for (checks = 0; checks < SYNC_PROGRESS_ATTEMPTS; checks++) { | |
233 | r = wait_for_terminate_with_timeout(pid, SYNC_TIMEOUT_USEC); | |
234 | if (r == 0) | |
235 | /* Sync finished without error. | |
236 | * (The sync itself does not return an error code) */ | |
237 | return; | |
238 | else if (r == -ETIMEDOUT) { | |
239 | /* Reset the check counter if the "Dirty" value is | |
240 | * decreasing */ | |
241 | if (sync_making_progress(&dirty)) | |
242 | checks = 0; | |
243 | } else { | |
244 | log_error_errno(r, "Failed to sync filesystems and block devices: %m"); | |
245 | return; | |
246 | } | |
247 | } | |
248 | ||
249 | /* Only reached in the event of a timeout. We should issue a kill | |
250 | * to the stray process. */ | |
251 | log_error("Syncing filesystems and block devices - timed out, issuing SIGKILL to PID "PID_FMT".", pid); | |
252 | (void) kill(pid, SIGKILL); | |
253 | } | |
254 | ||
b1b2a107 | 255 | int main(int argc, char *argv[]) { |
8c977838 | 256 | bool need_umount, need_swapoff, need_loop_detach, need_dm_detach; |
456b2199 | 257 | bool in_container, use_watchdog = false, can_initrd; |
06beed6d | 258 | _cleanup_free_ char *cgroup = NULL; |
6edd7d0a | 259 | char *arguments[3]; |
456b2199 | 260 | int cmd, r, umount_log_level = LOG_INFO; |
e801700e | 261 | static const char* const dirs[] = {SYSTEM_SHUTDOWN_PATH, NULL}; |
8a2c1fbf | 262 | char *watchdog_device; |
b1b2a107 | 263 | |
e18805fb LP |
264 | /* The log target defaults to console, but the original systemd process will pass its log target in through a |
265 | * command line argument, which will override this default. Also, ensure we'll never log to the journal or | |
266 | * syslog, as these logging daemons are either already dead or will die very soon. */ | |
267 | ||
268 | log_set_target(LOG_TARGET_CONSOLE); | |
269 | log_set_prohibit_ipc(true); | |
b1e90ec5 | 270 | log_parse_environment(); |
e18805fb | 271 | |
b1e90ec5 ZJS |
272 | r = parse_argv(argc, argv); |
273 | if (r < 0) | |
274 | goto error; | |
ec26be51 | 275 | |
b1b2a107 FF |
276 | log_open(); |
277 | ||
4c12626c LP |
278 | umask(0022); |
279 | ||
df0ff127 | 280 | if (getpid_cached() != 1) { |
b1e90ec5 | 281 | log_error("Not executed by init (PID 1)."); |
b1b2a107 FF |
282 | r = -EPERM; |
283 | goto error; | |
284 | } | |
285 | ||
b1e90ec5 | 286 | if (streq(arg_verb, "reboot")) |
b1b2a107 | 287 | cmd = RB_AUTOBOOT; |
b1e90ec5 | 288 | else if (streq(arg_verb, "poweroff")) |
b1b2a107 | 289 | cmd = RB_POWER_OFF; |
b1e90ec5 | 290 | else if (streq(arg_verb, "halt")) |
b1b2a107 | 291 | cmd = RB_HALT_SYSTEM; |
b1e90ec5 | 292 | else if (streq(arg_verb, "kexec")) |
b1b2a107 | 293 | cmd = LINUX_REBOOT_CMD_KEXEC; |
287419c1 AC |
294 | else if (streq(arg_verb, "exit")) |
295 | cmd = 0; /* ignored, just checking that arg_verb is valid */ | |
b1b2a107 | 296 | else { |
b1e90ec5 | 297 | log_error("Unknown action '%s'.", arg_verb); |
e18805fb | 298 | r = -EINVAL; |
b1b2a107 FF |
299 | goto error; |
300 | } | |
301 | ||
0b9aa270 | 302 | (void) cg_get_root_path(&cgroup); |
2e79d182 | 303 | in_container = detect_container() > 0; |
41f85451 | 304 | |
e96d6be7 | 305 | use_watchdog = !!getenv("WATCHDOG_USEC"); |
8a2c1fbf EJ |
306 | watchdog_device = getenv("WATCHDOG_DEVICE"); |
307 | if (watchdog_device) { | |
308 | r = watchdog_set_device(watchdog_device); | |
309 | if (r < 0) | |
310 | log_warning_errno(r, "Failed to set watchdog device to %s, ignoring: %m", | |
311 | watchdog_device); | |
312 | } | |
e96d6be7 | 313 | |
2e79d182 | 314 | /* Lock us into memory */ |
e18805fb | 315 | (void) mlockall(MCL_CURRENT|MCL_FUTURE); |
b1b2a107 | 316 | |
2e79d182 LP |
317 | /* Synchronize everything that is not written to disk yet at this point already. This is a good idea so that |
318 | * slow IO is processed here already and the final process killing spree is not impacted by processes | |
73ad712f KW |
319 | * desperately trying to sync IO to disk within their timeout. Do not remove this sync, data corruption will |
320 | * result. */ | |
2e79d182 | 321 | if (!in_container) |
73ad712f | 322 | sync_with_progress(); |
2e79d182 | 323 | |
e557b1a6 | 324 | disable_coredumps(); |
27b372c1 | 325 | |
ab58e291 | 326 | log_info("Sending SIGTERM to remaining processes..."); |
e73c54b8 | 327 | broadcast_signal(SIGTERM, true, true, arg_timeout); |
b1b2a107 | 328 | |
ab58e291 | 329 | log_info("Sending SIGKILL to remaining processes..."); |
e73c54b8 | 330 | broadcast_signal(SIGKILL, true, false, arg_timeout); |
40e85d00 | 331 | |
d89b5fed | 332 | need_umount = !in_container; |
8c977838 ZJS |
333 | need_swapoff = !in_container; |
334 | need_loop_detach = !in_container; | |
335 | need_dm_detach = !in_container; | |
456b2199 | 336 | can_initrd = !in_container && !in_initrd() && access("/run/initramfs/shutdown", X_OK) == 0; |
b1b2a107 | 337 | |
567ea02a | 338 | /* Unmount all mountpoints, swaps, and loopback devices */ |
ac9cea5b | 339 | for (;;) { |
12aad1d0 LP |
340 | bool changed = false; |
341 | ||
e96d6be7 LP |
342 | if (use_watchdog) |
343 | watchdog_ping(); | |
344 | ||
41f85451 LP |
345 | /* Let's trim the cgroup tree on each iteration so |
346 | that we leave an empty cgroup tree around, so that | |
347 | container managers get a nice notify event when we | |
348 | are down */ | |
349 | if (cgroup) | |
350 | cg_trim(SYSTEMD_CGROUP_CONTROLLER, cgroup, false); | |
351 | ||
b1b2a107 | 352 | if (need_umount) { |
ab58e291 | 353 | log_info("Unmounting file systems."); |
456b2199 | 354 | r = umount_all(&changed, umount_log_level); |
bce93b7a | 355 | if (r == 0) { |
b1b2a107 | 356 | need_umount = false; |
bce93b7a MS |
357 | log_info("All filesystems unmounted."); |
358 | } else if (r > 0) | |
ab58e291 | 359 | log_info("Not all file systems unmounted, %d left.", r); |
b1b2a107 | 360 | else |
da927ba9 | 361 | log_error_errno(r, "Failed to unmount file systems: %m"); |
b1b2a107 FF |
362 | } |
363 | ||
364 | if (need_swapoff) { | |
735e0712 | 365 | log_info("Deactivating swaps."); |
12aad1d0 | 366 | r = swapoff_all(&changed); |
bce93b7a | 367 | if (r == 0) { |
b1b2a107 | 368 | need_swapoff = false; |
735e0712 | 369 | log_info("All swaps deactivated."); |
bce93b7a | 370 | } else if (r > 0) |
735e0712 | 371 | log_info("Not all swaps deactivated, %d left.", r); |
b1b2a107 | 372 | else |
da927ba9 | 373 | log_error_errno(r, "Failed to deactivate swaps: %m"); |
b1b2a107 FF |
374 | } |
375 | ||
376 | if (need_loop_detach) { | |
377 | log_info("Detaching loop devices."); | |
456b2199 | 378 | r = loopback_detach_all(&changed, umount_log_level); |
bce93b7a | 379 | if (r == 0) { |
b1b2a107 | 380 | need_loop_detach = false; |
bce93b7a MS |
381 | log_info("All loop devices detached."); |
382 | } else if (r > 0) | |
ab58e291 | 383 | log_info("Not all loop devices detached, %d left.", r); |
b1b2a107 | 384 | else |
da927ba9 | 385 | log_error_errno(r, "Failed to detach loop devices: %m"); |
d48141ba | 386 | } |
b1b2a107 | 387 | |
d48141ba LP |
388 | if (need_dm_detach) { |
389 | log_info("Detaching DM devices."); | |
456b2199 | 390 | r = dm_detach_all(&changed, umount_log_level); |
bce93b7a | 391 | if (r == 0) { |
d48141ba | 392 | need_dm_detach = false; |
bce93b7a MS |
393 | log_info("All DM devices detached."); |
394 | } else if (r > 0) | |
2569a5ce | 395 | log_info("Not all DM devices detached, %d left.", r); |
d48141ba | 396 | else |
da927ba9 | 397 | log_error_errno(r, "Failed to detach DM devices: %m"); |
b1b2a107 FF |
398 | } |
399 | ||
a27d2184 | 400 | if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) { |
ac9cea5b | 401 | log_info("All filesystems, swaps, loop devices and DM devices detached."); |
12aad1d0 | 402 | /* Yay, done */ |
ac9cea5b | 403 | break; |
a27d2184 | 404 | } |
b1b2a107 | 405 | |
456b2199 JJ |
406 | if (!changed && umount_log_level == LOG_INFO && !can_initrd) { |
407 | /* There are things we cannot get rid of. Loop one more time | |
408 | * with LOG_ERR to inform the user. Note that we don't need | |
409 | * to do this if there is a initrd to switch to, because that | |
410 | * one is likely to get rid of the remounting mounts. If not, | |
411 | * it will log about them. */ | |
412 | umount_log_level = LOG_ERR; | |
413 | continue; | |
414 | } | |
415 | ||
12aad1d0 | 416 | /* If in this iteration we didn't manage to |
bd3fa1d2 | 417 | * unmount/deactivate anything, we simply give up */ |
12aad1d0 | 418 | if (!changed) { |
8c977838 ZJS |
419 | log_info("Cannot finalize remaining%s%s%s%s continuing.", |
420 | need_umount ? " file systems," : "", | |
421 | need_swapoff ? " swap devices," : "", | |
422 | need_loop_detach ? " loop devices," : "", | |
423 | need_dm_detach ? " DM devices," : ""); | |
ac9cea5b | 424 | break; |
12aad1d0 LP |
425 | } |
426 | ||
ac9cea5b | 427 | log_debug("Couldn't finalize remaining %s%s%s%s trying again.", |
8c977838 ZJS |
428 | need_umount ? " file systems," : "", |
429 | need_swapoff ? " swap devices," : "", | |
430 | need_loop_detach ? " loop devices," : "", | |
431 | need_dm_detach ? " DM devices," : ""); | |
b1b2a107 FF |
432 | } |
433 | ||
8a2c1fbf EJ |
434 | /* We're done with the watchdog. */ |
435 | watchdog_free_device(); | |
436 | ||
6edd7d0a | 437 | arguments[0] = NULL; |
b1e90ec5 | 438 | arguments[1] = arg_verb; |
6edd7d0a | 439 | arguments[2] = NULL; |
c6e47247 | 440 | execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments); |
83cc030f | 441 | |
456b2199 | 442 | if (can_initrd) { |
5a4bf02f HH |
443 | r = switch_root_initramfs(); |
444 | if (r >= 0) { | |
a2726e5c | 445 | argv[0] = (char*) "/shutdown"; |
30d743f4 | 446 | |
5a4bf02f HH |
447 | setsid(); |
448 | make_console_stdio(); | |
449 | ||
450 | log_info("Successfully changed into root pivot.\n" | |
451 | "Returning to initrd..."); | |
30d743f4 | 452 | |
a2726e5c | 453 | execv("/shutdown", argv); |
56f64d95 | 454 | log_error_errno(errno, "Failed to execute shutdown binary: %m"); |
5a4bf02f | 455 | } else |
da927ba9 | 456 | log_error_errno(r, "Failed to switch root to \"/run/initramfs\": %m"); |
5a4bf02f | 457 | |
7cb1094a HH |
458 | } |
459 | ||
8c977838 ZJS |
460 | if (need_umount || need_swapoff || need_loop_detach || need_dm_detach) |
461 | log_error("Failed to finalize %s%s%s%s ignoring", | |
462 | need_umount ? " file systems," : "", | |
463 | need_swapoff ? " swap devices," : "", | |
464 | need_loop_detach ? " loop devices," : "", | |
465 | need_dm_detach ? " DM devices," : ""); | |
466 | ||
2e79d182 LP |
467 | /* The kernel will automatically flush ATA disks and suchlike on reboot(), but the file systems need to be |
468 | * sync'ed explicitly in advance. So let's do this here, but not needlessly slow down containers. Note that we | |
469 | * sync'ed things already once above, but we did some more work since then which might have caused IO, hence | |
73ad712f | 470 | * let's do it once more. Do not remove this sync, data corruption will result. */ |
0049f05a | 471 | if (!in_container) |
73ad712f | 472 | sync_with_progress(); |
0049f05a | 473 | |
287419c1 AC |
474 | if (streq(arg_verb, "exit")) { |
475 | if (in_container) | |
1f409a0c LP |
476 | return arg_exit_code; |
477 | ||
478 | cmd = RB_POWER_OFF; /* We cannot exit() on the host, fallback on another method. */ | |
287419c1 AC |
479 | } |
480 | ||
477def80 LP |
481 | switch (cmd) { |
482 | ||
483 | case LINUX_REBOOT_CMD_KEXEC: | |
cb7ec564 LP |
484 | |
485 | if (!in_container) { | |
486 | /* We cheat and exec kexec to avoid doing all its work */ | |
477def80 | 487 | log_info("Rebooting with kexec."); |
cb7ec564 | 488 | |
1f5d1e02 | 489 | r = safe_fork("(sd-kexec)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_LOG|FORK_WAIT, NULL); |
4c253ed1 | 490 | if (r == 0) { |
477def80 LP |
491 | const char * const args[] = { |
492 | KEXEC, "-e", NULL | |
493 | }; | |
494 | ||
cb7ec564 | 495 | /* Child */ |
477def80 | 496 | |
cb7ec564 | 497 | execv(args[0], (char * const *) args); |
477def80 | 498 | _exit(EXIT_FAILURE); |
4c253ed1 LP |
499 | } |
500 | ||
1f5d1e02 | 501 | /* If we are still running, then the kexec can't have worked, let's fall through */ |
b1b2a107 | 502 | } |
e61cd186 LP |
503 | |
504 | cmd = RB_AUTOBOOT; | |
4831981d | 505 | _fallthrough_; |
477def80 | 506 | |
c01dcddf LP |
507 | case RB_AUTOBOOT: |
508 | (void) reboot_with_parameter(REBOOT_LOG); | |
477def80 LP |
509 | log_info("Rebooting."); |
510 | break; | |
511 | ||
512 | case RB_POWER_OFF: | |
513 | log_info("Powering off."); | |
514 | break; | |
515 | ||
516 | case RB_HALT_SYSTEM: | |
517 | log_info("Halting system."); | |
518 | break; | |
519 | ||
520 | default: | |
521 | assert_not_reached("Unknown magic"); | |
522 | } | |
cb7ec564 | 523 | |
118cf952 | 524 | (void) reboot(cmd); |
cb7ec564 LP |
525 | if (errno == EPERM && in_container) { |
526 | /* If we are in a container, and we lacked | |
527 | * CAP_SYS_BOOT just exit, this will kill our | |
528 | * container for good. */ | |
477def80 | 529 | log_info("Exiting container."); |
1f409a0c | 530 | return EXIT_SUCCESS; |
cb7ec564 LP |
531 | } |
532 | ||
76ef789d | 533 | r = log_error_errno(errno, "Failed to invoke reboot(): %m"); |
b1b2a107 FF |
534 | |
535 | error: | |
da927ba9 | 536 | log_emergency_errno(r, "Critical error while doing system shutdown: %m"); |
b1b2a107 | 537 | freeze(); |
b1b2a107 | 538 | } |