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core: fix shutdown of --user
[thirdparty/systemd.git] / src / core / main.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include <stdio.h>
23 #include <errno.h>
24 #include <string.h>
25 #include <unistd.h>
26 #include <sys/stat.h>
27 #include <getopt.h>
28 #include <signal.h>
29 #include <fcntl.h>
30 #include <sys/prctl.h>
31 #include <sys/mount.h>
32
33 #ifdef HAVE_VALGRIND_VALGRIND_H
34 #include <valgrind/valgrind.h>
35 #endif
36 #ifdef HAVE_SECCOMP
37 #include <seccomp.h>
38 #endif
39
40 #include "sd-daemon.h"
41 #include "sd-bus.h"
42 #include "log.h"
43 #include "fdset.h"
44 #include "special.h"
45 #include "conf-parser.h"
46 #include "missing.h"
47 #include "pager.h"
48 #include "build.h"
49 #include "strv.h"
50 #include "def.h"
51 #include "virt.h"
52 #include "architecture.h"
53 #include "watchdog.h"
54 #include "switch-root.h"
55 #include "capability.h"
56 #include "killall.h"
57 #include "env-util.h"
58 #include "clock-util.h"
59 #include "fileio.h"
60 #include "bus-error.h"
61 #include "bus-util.h"
62 #include "selinux-util.h"
63 #include "formats-util.h"
64 #include "process-util.h"
65 #include "terminal-util.h"
66 #include "signal-util.h"
67 #include "manager.h"
68 #include "dbus-manager.h"
69 #include "load-fragment.h"
70
71 #include "mount-setup.h"
72 #include "loopback-setup.h"
73 #include "hostname-setup.h"
74 #include "machine-id-setup.h"
75 #include "selinux-setup.h"
76 #include "ima-setup.h"
77 #include "smack-setup.h"
78 #include "kmod-setup.h"
79
80 static enum {
81 ACTION_RUN,
82 ACTION_HELP,
83 ACTION_VERSION,
84 ACTION_TEST,
85 ACTION_DUMP_CONFIGURATION_ITEMS,
86 ACTION_DONE
87 } arg_action = ACTION_RUN;
88 static char *arg_default_unit = NULL;
89 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
90 static bool arg_dump_core = true;
91 static bool arg_crash_shell = false;
92 static int arg_crash_chvt = -1;
93 static bool arg_confirm_spawn = false;
94 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
95 static bool arg_switched_root = false;
96 static int arg_no_pager = -1;
97 static char ***arg_join_controllers = NULL;
98 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
99 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
100 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
101 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
102 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
103 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
104 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
105 static usec_t arg_runtime_watchdog = 0;
106 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
107 static char **arg_default_environment = NULL;
108 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
109 static uint64_t arg_capability_bounding_set_drop = 0;
110 static nsec_t arg_timer_slack_nsec = NSEC_INFINITY;
111 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
112 static Set* arg_syscall_archs = NULL;
113 static FILE* arg_serialization = NULL;
114 static bool arg_default_cpu_accounting = false;
115 static bool arg_default_blockio_accounting = false;
116 static bool arg_default_memory_accounting = false;
117 static bool arg_default_tasks_accounting = false;
118
119 static void nop_handler(int sig) {}
120
121 static void pager_open_if_enabled(void) {
122
123 if (arg_no_pager <= 0)
124 return;
125
126 pager_open(false);
127 }
128
129 noreturn static void crash(int sig) {
130
131 if (getpid() != 1)
132 /* Pass this on immediately, if this is not PID 1 */
133 raise(sig);
134 else if (!arg_dump_core)
135 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig));
136 else {
137 struct sigaction sa = {
138 .sa_handler = nop_handler,
139 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
140 };
141 pid_t pid;
142
143 /* We want to wait for the core process, hence let's enable SIGCHLD */
144 sigaction(SIGCHLD, &sa, NULL);
145
146 pid = raw_clone(SIGCHLD, NULL);
147 if (pid < 0)
148 log_emergency_errno(errno, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
149
150 else if (pid == 0) {
151 struct rlimit rl = {};
152
153 /* Enable default signal handler for core dump */
154 zero(sa);
155 sa.sa_handler = SIG_DFL;
156 sigaction(sig, &sa, NULL);
157
158 /* Don't limit the core dump size */
159 rl.rlim_cur = RLIM_INFINITY;
160 rl.rlim_max = RLIM_INFINITY;
161 setrlimit(RLIMIT_CORE, &rl);
162
163 /* Just to be sure... */
164 (void) chdir("/");
165
166 /* Raise the signal again */
167 pid = raw_getpid();
168 kill(pid, sig); /* raise() would kill the parent */
169
170 assert_not_reached("We shouldn't be here...");
171 _exit(1);
172 } else {
173 siginfo_t status;
174 int r;
175
176 /* Order things nicely. */
177 r = wait_for_terminate(pid, &status);
178 if (r < 0)
179 log_emergency_errno(r, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig));
180 else if (status.si_code != CLD_DUMPED)
181 log_emergency("Caught <%s>, core dump failed (child "PID_FMT", code=%s, status=%i/%s).",
182 signal_to_string(sig),
183 pid, sigchld_code_to_string(status.si_code),
184 status.si_status,
185 strna(status.si_code == CLD_EXITED
186 ? exit_status_to_string(status.si_status, EXIT_STATUS_FULL)
187 : signal_to_string(status.si_status)));
188 else
189 log_emergency("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
190 }
191 }
192
193 if (arg_crash_chvt)
194 chvt(arg_crash_chvt);
195
196 if (arg_crash_shell) {
197 struct sigaction sa = {
198 .sa_handler = SIG_IGN,
199 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
200 };
201 pid_t pid;
202
203 log_info("Executing crash shell in 10s...");
204 sleep(10);
205
206 /* Let the kernel reap children for us */
207 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
208
209 pid = raw_clone(SIGCHLD, NULL);
210 if (pid < 0)
211 log_emergency_errno(errno, "Failed to fork off crash shell: %m");
212 else if (pid == 0) {
213 make_console_stdio();
214 execle("/bin/sh", "/bin/sh", NULL, environ);
215
216 log_emergency_errno(errno, "execle() failed: %m");
217 _exit(1);
218 } else
219 log_info("Successfully spawned crash shell as PID "PID_FMT".", pid);
220 }
221
222 log_emergency("Freezing execution.");
223 freeze();
224 }
225
226 static void install_crash_handler(void) {
227 static const struct sigaction sa = {
228 .sa_handler = crash,
229 .sa_flags = SA_NODEFER, /* So that we can raise the signal again from the signal handler */
230 };
231 int r;
232
233 /* We ignore the return value here, since, we don't mind if we
234 * cannot set up a crash handler */
235 r = sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
236 if (r < 0)
237 log_debug_errno(r, "I had trouble setting up the crash handler, ignoring: %m");
238 }
239
240 static int console_setup(void) {
241 _cleanup_close_ int tty_fd = -1;
242 int r;
243
244 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
245 if (tty_fd < 0)
246 return log_error_errno(tty_fd, "Failed to open /dev/console: %m");
247
248 /* We don't want to force text mode. plymouth may be showing
249 * pictures already from initrd. */
250 r = reset_terminal_fd(tty_fd, false);
251 if (r < 0)
252 return log_error_errno(r, "Failed to reset /dev/console: %m");
253
254 return 0;
255 }
256
257 static int set_default_unit(const char *u) {
258 char *c;
259
260 assert(u);
261
262 c = strdup(u);
263 if (!c)
264 return -ENOMEM;
265
266 free(arg_default_unit);
267 arg_default_unit = c;
268
269 return 0;
270 }
271
272 static int parse_proc_cmdline_item(const char *key, const char *value) {
273
274 static const char * const rlmap[] = {
275 "emergency", SPECIAL_EMERGENCY_TARGET,
276 "-b", SPECIAL_EMERGENCY_TARGET,
277 "rescue", SPECIAL_RESCUE_TARGET,
278 "single", SPECIAL_RESCUE_TARGET,
279 "-s", SPECIAL_RESCUE_TARGET,
280 "s", SPECIAL_RESCUE_TARGET,
281 "S", SPECIAL_RESCUE_TARGET,
282 "1", SPECIAL_RESCUE_TARGET,
283 "2", SPECIAL_MULTI_USER_TARGET,
284 "3", SPECIAL_MULTI_USER_TARGET,
285 "4", SPECIAL_MULTI_USER_TARGET,
286 "5", SPECIAL_GRAPHICAL_TARGET,
287 };
288 int r;
289
290 assert(key);
291
292 if (streq(key, "systemd.unit") && value) {
293
294 if (!in_initrd())
295 return set_default_unit(value);
296
297 } else if (streq(key, "rd.systemd.unit") && value) {
298
299 if (in_initrd())
300 return set_default_unit(value);
301
302 } else if (streq(key, "systemd.dump_core") && value) {
303
304 r = parse_boolean(value);
305 if (r < 0)
306 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
307 else
308 arg_dump_core = r;
309
310 } else if (streq(key, "systemd.crash_shell") && value) {
311
312 r = parse_boolean(value);
313 if (r < 0)
314 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
315 else
316 arg_crash_shell = r;
317
318 } else if (streq(key, "systemd.crash_chvt") && value) {
319
320 if (safe_atoi(value, &r) < 0)
321 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
322 else
323 arg_crash_chvt = r;
324
325 } else if (streq(key, "systemd.confirm_spawn") && value) {
326
327 r = parse_boolean(value);
328 if (r < 0)
329 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
330 else
331 arg_confirm_spawn = r;
332
333 } else if (streq(key, "systemd.show_status") && value) {
334
335 r = parse_show_status(value, &arg_show_status);
336 if (r < 0)
337 log_warning("Failed to parse show status switch %s. Ignoring.", value);
338
339 } else if (streq(key, "systemd.default_standard_output") && value) {
340
341 r = exec_output_from_string(value);
342 if (r < 0)
343 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
344 else
345 arg_default_std_output = r;
346
347 } else if (streq(key, "systemd.default_standard_error") && value) {
348
349 r = exec_output_from_string(value);
350 if (r < 0)
351 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
352 else
353 arg_default_std_error = r;
354
355 } else if (streq(key, "systemd.setenv") && value) {
356
357 if (env_assignment_is_valid(value)) {
358 char **env;
359
360 env = strv_env_set(arg_default_environment, value);
361 if (env)
362 arg_default_environment = env;
363 else
364 log_warning_errno(ENOMEM, "Setting environment variable '%s' failed, ignoring: %m", value);
365 } else
366 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
367
368 } else if (streq(key, "quiet") && !value) {
369
370 if (arg_show_status == _SHOW_STATUS_UNSET)
371 arg_show_status = SHOW_STATUS_AUTO;
372
373 } else if (streq(key, "debug") && !value) {
374
375 /* Note that log_parse_environment() handles 'debug'
376 * too, and sets the log level to LOG_DEBUG. */
377
378 if (detect_container() > 0)
379 log_set_target(LOG_TARGET_CONSOLE);
380
381 } else if (!in_initrd() && !value) {
382 unsigned i;
383
384 /* SysV compatibility */
385 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
386 if (streq(key, rlmap[i]))
387 return set_default_unit(rlmap[i+1]);
388 }
389
390 return 0;
391 }
392
393 #define DEFINE_SETTER(name, func, descr) \
394 static int name(const char *unit, \
395 const char *filename, \
396 unsigned line, \
397 const char *section, \
398 unsigned section_line, \
399 const char *lvalue, \
400 int ltype, \
401 const char *rvalue, \
402 void *data, \
403 void *userdata) { \
404 \
405 int r; \
406 \
407 assert(filename); \
408 assert(lvalue); \
409 assert(rvalue); \
410 \
411 r = func(rvalue); \
412 if (r < 0) \
413 log_syntax(unit, LOG_ERR, filename, line, -r, \
414 "Invalid " descr "'%s': %s", \
415 rvalue, strerror(-r)); \
416 \
417 return 0; \
418 }
419
420 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
421 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
422 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
423 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
424
425 static int config_parse_cpu_affinity2(
426 const char *unit,
427 const char *filename,
428 unsigned line,
429 const char *section,
430 unsigned section_line,
431 const char *lvalue,
432 int ltype,
433 const char *rvalue,
434 void *data,
435 void *userdata) {
436
437 const char *whole_rvalue = rvalue;
438 _cleanup_cpu_free_ cpu_set_t *c = NULL;
439 unsigned ncpus = 0;
440
441 assert(filename);
442 assert(lvalue);
443 assert(rvalue);
444
445 for (;;) {
446 _cleanup_free_ char *word = NULL;
447 unsigned cpu;
448 int r;
449
450 r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES);
451 if (r < 0) {
452 log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
453 return r;
454 }
455 if (r == 0)
456 break;
457
458 r = safe_atou(word, &cpu);
459
460 if (!c)
461 if (!(c = cpu_set_malloc(&ncpus)))
462 return log_oom();
463
464 if (r < 0 || cpu >= ncpus) {
465 log_syntax(unit, LOG_ERR, filename, line, -r,
466 "Failed to parse CPU affinity '%s'", rvalue);
467 return -EBADMSG;
468 }
469
470 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
471 }
472 if (!isempty(rvalue))
473 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
474 "Trailing garbage, ignoring.");
475
476 if (c)
477 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
478 log_warning("Failed to set CPU affinity: %m");
479
480 return 0;
481 }
482
483 static int config_parse_show_status(
484 const char* unit,
485 const char *filename,
486 unsigned line,
487 const char *section,
488 unsigned section_line,
489 const char *lvalue,
490 int ltype,
491 const char *rvalue,
492 void *data,
493 void *userdata) {
494
495 int k;
496 ShowStatus *b = data;
497
498 assert(filename);
499 assert(lvalue);
500 assert(rvalue);
501 assert(data);
502
503 k = parse_show_status(rvalue, b);
504 if (k < 0) {
505 log_syntax(unit, LOG_ERR, filename, line, -k,
506 "Failed to parse show status setting, ignoring: %s", rvalue);
507 return 0;
508 }
509
510 return 0;
511 }
512
513 static void strv_free_free(char ***l) {
514 char ***i;
515
516 if (!l)
517 return;
518
519 for (i = l; *i; i++)
520 strv_free(*i);
521
522 free(l);
523 }
524
525 static void free_join_controllers(void) {
526 strv_free_free(arg_join_controllers);
527 arg_join_controllers = NULL;
528 }
529
530 static int config_parse_join_controllers(const char *unit,
531 const char *filename,
532 unsigned line,
533 const char *section,
534 unsigned section_line,
535 const char *lvalue,
536 int ltype,
537 const char *rvalue,
538 void *data,
539 void *userdata) {
540
541 const char *whole_rvalue = rvalue;
542 unsigned n = 0;
543
544 assert(filename);
545 assert(lvalue);
546 assert(rvalue);
547
548 free_join_controllers();
549
550 for (;;) {
551 _cleanup_free_ char *word = NULL;
552 char **l;
553 int r;
554
555 r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES);
556 if (r < 0) {
557 log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
558 return r;
559 }
560 if (r == 0)
561 break;
562
563 l = strv_split(word, ",");
564 if (!l)
565 log_oom();
566 strv_uniq(l);
567
568 if (strv_length(l) <= 1) {
569 strv_free(l);
570 continue;
571 }
572
573 if (!arg_join_controllers) {
574 arg_join_controllers = new(char**, 2);
575 if (!arg_join_controllers) {
576 strv_free(l);
577 return log_oom();
578 }
579
580 arg_join_controllers[0] = l;
581 arg_join_controllers[1] = NULL;
582
583 n = 1;
584 } else {
585 char ***a;
586 char ***t;
587
588 t = new0(char**, n+2);
589 if (!t) {
590 strv_free(l);
591 return log_oom();
592 }
593
594 n = 0;
595
596 for (a = arg_join_controllers; *a; a++) {
597
598 if (strv_overlap(*a, l)) {
599 if (strv_extend_strv(&l, *a) < 0) {
600 strv_free(l);
601 strv_free_free(t);
602 return log_oom();
603 }
604
605 } else {
606 char **c;
607
608 c = strv_copy(*a);
609 if (!c) {
610 strv_free(l);
611 strv_free_free(t);
612 return log_oom();
613 }
614
615 t[n++] = c;
616 }
617 }
618
619 t[n++] = strv_uniq(l);
620
621 strv_free_free(arg_join_controllers);
622 arg_join_controllers = t;
623 }
624 }
625 if (!isempty(rvalue))
626 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
627 "Trailing garbage, ignoring.");
628
629 return 0;
630 }
631
632 static int parse_config_file(void) {
633
634 const ConfigTableItem items[] = {
635 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
636 { "Manager", "LogTarget", config_parse_target, 0, NULL },
637 { "Manager", "LogColor", config_parse_color, 0, NULL },
638 { "Manager", "LogLocation", config_parse_location, 0, NULL },
639 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
640 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
641 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
642 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
643 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
644 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
645 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
646 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
647 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
648 #ifdef HAVE_SECCOMP
649 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
650 #endif
651 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
652 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
653 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
654 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
655 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
656 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
657 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
658 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
659 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
660 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
661 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
662 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
663 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
664 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
665 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
666 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
667 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
668 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
669 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
670 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
671 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
672 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
673 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
674 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
675 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
676 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
677 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
678 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
679 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
680 { "Manager", "DefaultTasksAccounting", config_parse_bool, 0, &arg_default_tasks_accounting },
681 {}
682 };
683
684 const char *fn, *conf_dirs_nulstr;
685
686 fn = arg_running_as == MANAGER_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
687 conf_dirs_nulstr = arg_running_as == MANAGER_SYSTEM ? CONF_DIRS_NULSTR("systemd/system.conf") : CONF_DIRS_NULSTR("systemd/user.conf");
688 config_parse_many(fn, conf_dirs_nulstr, "Manager\0",
689 config_item_table_lookup, items, false, NULL);
690
691 return 0;
692 }
693
694 static void manager_set_defaults(Manager *m) {
695
696 assert(m);
697
698 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
699 m->default_std_output = arg_default_std_output;
700 m->default_std_error = arg_default_std_error;
701 m->default_timeout_start_usec = arg_default_timeout_start_usec;
702 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
703 m->default_restart_usec = arg_default_restart_usec;
704 m->default_start_limit_interval = arg_default_start_limit_interval;
705 m->default_start_limit_burst = arg_default_start_limit_burst;
706 m->default_cpu_accounting = arg_default_cpu_accounting;
707 m->default_blockio_accounting = arg_default_blockio_accounting;
708 m->default_memory_accounting = arg_default_memory_accounting;
709 m->default_tasks_accounting = arg_default_tasks_accounting;
710
711 manager_set_default_rlimits(m, arg_default_rlimit);
712 manager_environment_add(m, NULL, arg_default_environment);
713 }
714
715 static int parse_argv(int argc, char *argv[]) {
716
717 enum {
718 ARG_LOG_LEVEL = 0x100,
719 ARG_LOG_TARGET,
720 ARG_LOG_COLOR,
721 ARG_LOG_LOCATION,
722 ARG_UNIT,
723 ARG_SYSTEM,
724 ARG_USER,
725 ARG_TEST,
726 ARG_NO_PAGER,
727 ARG_VERSION,
728 ARG_DUMP_CONFIGURATION_ITEMS,
729 ARG_DUMP_CORE,
730 ARG_CRASH_SHELL,
731 ARG_CONFIRM_SPAWN,
732 ARG_SHOW_STATUS,
733 ARG_DESERIALIZE,
734 ARG_SWITCHED_ROOT,
735 ARG_DEFAULT_STD_OUTPUT,
736 ARG_DEFAULT_STD_ERROR
737 };
738
739 static const struct option options[] = {
740 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
741 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
742 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
743 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
744 { "unit", required_argument, NULL, ARG_UNIT },
745 { "system", no_argument, NULL, ARG_SYSTEM },
746 { "user", no_argument, NULL, ARG_USER },
747 { "test", no_argument, NULL, ARG_TEST },
748 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
749 { "help", no_argument, NULL, 'h' },
750 { "version", no_argument, NULL, ARG_VERSION },
751 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
752 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
753 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
754 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
755 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
756 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
757 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
758 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
759 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
760 {}
761 };
762
763 int c, r;
764
765 assert(argc >= 1);
766 assert(argv);
767
768 if (getpid() == 1)
769 opterr = 0;
770
771 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
772
773 switch (c) {
774
775 case ARG_LOG_LEVEL:
776 r = log_set_max_level_from_string(optarg);
777 if (r < 0) {
778 log_error("Failed to parse log level %s.", optarg);
779 return r;
780 }
781
782 break;
783
784 case ARG_LOG_TARGET:
785 r = log_set_target_from_string(optarg);
786 if (r < 0) {
787 log_error("Failed to parse log target %s.", optarg);
788 return r;
789 }
790
791 break;
792
793 case ARG_LOG_COLOR:
794
795 if (optarg) {
796 r = log_show_color_from_string(optarg);
797 if (r < 0) {
798 log_error("Failed to parse log color setting %s.", optarg);
799 return r;
800 }
801 } else
802 log_show_color(true);
803
804 break;
805
806 case ARG_LOG_LOCATION:
807 if (optarg) {
808 r = log_show_location_from_string(optarg);
809 if (r < 0) {
810 log_error("Failed to parse log location setting %s.", optarg);
811 return r;
812 }
813 } else
814 log_show_location(true);
815
816 break;
817
818 case ARG_DEFAULT_STD_OUTPUT:
819 r = exec_output_from_string(optarg);
820 if (r < 0) {
821 log_error("Failed to parse default standard output setting %s.", optarg);
822 return r;
823 } else
824 arg_default_std_output = r;
825 break;
826
827 case ARG_DEFAULT_STD_ERROR:
828 r = exec_output_from_string(optarg);
829 if (r < 0) {
830 log_error("Failed to parse default standard error output setting %s.", optarg);
831 return r;
832 } else
833 arg_default_std_error = r;
834 break;
835
836 case ARG_UNIT:
837
838 r = set_default_unit(optarg);
839 if (r < 0)
840 return log_error_errno(r, "Failed to set default unit %s: %m", optarg);
841
842 break;
843
844 case ARG_SYSTEM:
845 arg_running_as = MANAGER_SYSTEM;
846 break;
847
848 case ARG_USER:
849 arg_running_as = MANAGER_USER;
850 break;
851
852 case ARG_TEST:
853 arg_action = ACTION_TEST;
854 if (arg_no_pager < 0)
855 arg_no_pager = true;
856 break;
857
858 case ARG_NO_PAGER:
859 arg_no_pager = true;
860 break;
861
862 case ARG_VERSION:
863 arg_action = ACTION_VERSION;
864 break;
865
866 case ARG_DUMP_CONFIGURATION_ITEMS:
867 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
868 break;
869
870 case ARG_DUMP_CORE:
871 r = optarg ? parse_boolean(optarg) : 1;
872 if (r < 0) {
873 log_error("Failed to parse dump core boolean %s.", optarg);
874 return r;
875 }
876 arg_dump_core = r;
877 break;
878
879 case ARG_CRASH_SHELL:
880 r = optarg ? parse_boolean(optarg) : 1;
881 if (r < 0) {
882 log_error("Failed to parse crash shell boolean %s.", optarg);
883 return r;
884 }
885 arg_crash_shell = r;
886 break;
887
888 case ARG_CONFIRM_SPAWN:
889 r = optarg ? parse_boolean(optarg) : 1;
890 if (r < 0) {
891 log_error("Failed to parse confirm spawn boolean %s.", optarg);
892 return r;
893 }
894 arg_confirm_spawn = r;
895 break;
896
897 case ARG_SHOW_STATUS:
898 if (optarg) {
899 r = parse_show_status(optarg, &arg_show_status);
900 if (r < 0) {
901 log_error("Failed to parse show status boolean %s.", optarg);
902 return r;
903 }
904 } else
905 arg_show_status = SHOW_STATUS_YES;
906 break;
907
908 case ARG_DESERIALIZE: {
909 int fd;
910 FILE *f;
911
912 r = safe_atoi(optarg, &fd);
913 if (r < 0 || fd < 0) {
914 log_error("Failed to parse deserialize option %s.", optarg);
915 return r < 0 ? r : -EINVAL;
916 }
917
918 fd_cloexec(fd, true);
919
920 f = fdopen(fd, "r");
921 if (!f)
922 return log_error_errno(errno, "Failed to open serialization fd: %m");
923
924 safe_fclose(arg_serialization);
925
926 arg_serialization = f;
927
928 break;
929 }
930
931 case ARG_SWITCHED_ROOT:
932 arg_switched_root = true;
933 break;
934
935 case 'h':
936 arg_action = ACTION_HELP;
937 if (arg_no_pager < 0)
938 arg_no_pager = true;
939 break;
940
941 case 'D':
942 log_set_max_level(LOG_DEBUG);
943 break;
944
945 case 'b':
946 case 's':
947 case 'z':
948 /* Just to eat away the sysvinit kernel
949 * cmdline args without getopt() error
950 * messages that we'll parse in
951 * parse_proc_cmdline_word() or ignore. */
952
953 case '?':
954 if (getpid() != 1)
955 return -EINVAL;
956 else
957 return 0;
958
959 default:
960 assert_not_reached("Unhandled option code.");
961 }
962
963 if (optind < argc && getpid() != 1) {
964 /* Hmm, when we aren't run as init system
965 * let's complain about excess arguments */
966
967 log_error("Excess arguments.");
968 return -EINVAL;
969 }
970
971 return 0;
972 }
973
974 static int help(void) {
975
976 printf("%s [OPTIONS...]\n\n"
977 "Starts up and maintains the system or user services.\n\n"
978 " -h --help Show this help\n"
979 " --test Determine startup sequence, dump it and exit\n"
980 " --no-pager Do not pipe output into a pager\n"
981 " --dump-configuration-items Dump understood unit configuration items\n"
982 " --unit=UNIT Set default unit\n"
983 " --system Run a system instance, even if PID != 1\n"
984 " --user Run a user instance\n"
985 " --dump-core[=0|1] Dump core on crash\n"
986 " --crash-shell[=0|1] Run shell on crash\n"
987 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
988 " --show-status[=0|1] Show status updates on the console during bootup\n"
989 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
990 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
991 " --log-color[=0|1] Highlight important log messages\n"
992 " --log-location[=0|1] Include code location in log messages\n"
993 " --default-standard-output= Set default standard output for services\n"
994 " --default-standard-error= Set default standard error output for services\n",
995 program_invocation_short_name);
996
997 return 0;
998 }
999
1000 static int version(void) {
1001 puts(PACKAGE_STRING);
1002 puts(SYSTEMD_FEATURES);
1003
1004 return 0;
1005 }
1006
1007 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1008 FILE *f = NULL;
1009 FDSet *fds = NULL;
1010 int r;
1011
1012 assert(m);
1013 assert(_f);
1014 assert(_fds);
1015
1016 r = manager_open_serialization(m, &f);
1017 if (r < 0) {
1018 log_error_errno(r, "Failed to create serialization file: %m");
1019 goto fail;
1020 }
1021
1022 /* Make sure nothing is really destructed when we shut down */
1023 m->n_reloading ++;
1024 bus_manager_send_reloading(m, true);
1025
1026 fds = fdset_new();
1027 if (!fds) {
1028 r = -ENOMEM;
1029 log_error_errno(r, "Failed to allocate fd set: %m");
1030 goto fail;
1031 }
1032
1033 r = manager_serialize(m, f, fds, switching_root);
1034 if (r < 0) {
1035 log_error_errno(r, "Failed to serialize state: %m");
1036 goto fail;
1037 }
1038
1039 if (fseeko(f, 0, SEEK_SET) < 0) {
1040 log_error_errno(errno, "Failed to rewind serialization fd: %m");
1041 goto fail;
1042 }
1043
1044 r = fd_cloexec(fileno(f), false);
1045 if (r < 0) {
1046 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m");
1047 goto fail;
1048 }
1049
1050 r = fdset_cloexec(fds, false);
1051 if (r < 0) {
1052 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m");
1053 goto fail;
1054 }
1055
1056 *_f = f;
1057 *_fds = fds;
1058
1059 return 0;
1060
1061 fail:
1062 fdset_free(fds);
1063
1064 safe_fclose(f);
1065
1066 return r;
1067 }
1068
1069 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1070 struct rlimit nl;
1071 int r;
1072
1073 assert(saved_rlimit);
1074
1075 /* Save the original RLIMIT_NOFILE so that we can reset it
1076 * later when transitioning from the initrd to the main
1077 * systemd or suchlike. */
1078 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0)
1079 return log_error_errno(errno, "Reading RLIMIT_NOFILE failed: %m");
1080
1081 /* Make sure forked processes get the default kernel setting */
1082 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1083 struct rlimit *rl;
1084
1085 rl = newdup(struct rlimit, saved_rlimit, 1);
1086 if (!rl)
1087 return log_oom();
1088
1089 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1090 }
1091
1092 /* Bump up the resource limit for ourselves substantially */
1093 nl.rlim_cur = nl.rlim_max = 64*1024;
1094 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1095 if (r < 0)
1096 return log_error_errno(r, "Setting RLIMIT_NOFILE failed: %m");
1097
1098 return 0;
1099 }
1100
1101 static void test_mtab(void) {
1102
1103 static const char ok[] =
1104 "/proc/self/mounts\0"
1105 "/proc/mounts\0"
1106 "../proc/self/mounts\0"
1107 "../proc/mounts\0";
1108
1109 _cleanup_free_ char *p = NULL;
1110 int r;
1111
1112 /* Check that /etc/mtab is a symlink to the right place or
1113 * non-existing. But certainly not a file, or a symlink to
1114 * some weird place... */
1115
1116 r = readlink_malloc("/etc/mtab", &p);
1117 if (r == -ENOENT)
1118 return;
1119 if (r >= 0 && nulstr_contains(ok, p))
1120 return;
1121
1122 log_error("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1123 "This is not supported anymore. "
1124 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1125 freeze();
1126 }
1127
1128 static void test_usr(void) {
1129
1130 /* Check that /usr is not a separate fs */
1131
1132 if (dir_is_empty("/usr") <= 0)
1133 return;
1134
1135 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
1136 "Some things will probably break (sometimes even silently) in mysterious ways. "
1137 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1138 }
1139
1140 static int initialize_join_controllers(void) {
1141 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1142 * + "net_prio". We'd like to add "cpuset" to the mix, but
1143 * "cpuset" doesn't really work for groups with no initialized
1144 * attributes. */
1145
1146 arg_join_controllers = new(char**, 3);
1147 if (!arg_join_controllers)
1148 return -ENOMEM;
1149
1150 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1151 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1152 arg_join_controllers[2] = NULL;
1153
1154 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1155 free_join_controllers();
1156 return -ENOMEM;
1157 }
1158
1159 return 0;
1160 }
1161
1162 static int enforce_syscall_archs(Set *archs) {
1163 #ifdef HAVE_SECCOMP
1164 scmp_filter_ctx *seccomp;
1165 Iterator i;
1166 void *id;
1167 int r;
1168
1169 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1170 if (!seccomp)
1171 return log_oom();
1172
1173 SET_FOREACH(id, arg_syscall_archs, i) {
1174 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1175 if (r == -EEXIST)
1176 continue;
1177 if (r < 0) {
1178 log_error_errno(r, "Failed to add architecture to seccomp: %m");
1179 goto finish;
1180 }
1181 }
1182
1183 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1184 if (r < 0) {
1185 log_error_errno(r, "Failed to unset NO_NEW_PRIVS: %m");
1186 goto finish;
1187 }
1188
1189 r = seccomp_load(seccomp);
1190 if (r < 0)
1191 log_error_errno(r, "Failed to add install architecture seccomp: %m");
1192
1193 finish:
1194 seccomp_release(seccomp);
1195 return r;
1196 #else
1197 return 0;
1198 #endif
1199 }
1200
1201 static int status_welcome(void) {
1202 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1203 int r;
1204
1205 r = parse_env_file("/etc/os-release", NEWLINE,
1206 "PRETTY_NAME", &pretty_name,
1207 "ANSI_COLOR", &ansi_color,
1208 NULL);
1209 if (r == -ENOENT)
1210 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1211 "PRETTY_NAME", &pretty_name,
1212 "ANSI_COLOR", &ansi_color,
1213 NULL);
1214
1215 if (r < 0 && r != -ENOENT)
1216 log_warning_errno(r, "Failed to read os-release file: %m");
1217
1218 return status_printf(NULL, false, false,
1219 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1220 isempty(ansi_color) ? "1" : ansi_color,
1221 isempty(pretty_name) ? "Linux" : pretty_name);
1222 }
1223
1224 static int write_container_id(void) {
1225 const char *c;
1226
1227 c = getenv("container");
1228 if (isempty(c))
1229 return 0;
1230
1231 return write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE);
1232 }
1233
1234 int main(int argc, char *argv[]) {
1235 Manager *m = NULL;
1236 int r, retval = EXIT_FAILURE;
1237 usec_t before_startup, after_startup;
1238 char timespan[FORMAT_TIMESPAN_MAX];
1239 FDSet *fds = NULL;
1240 bool reexecute = false;
1241 const char *shutdown_verb = NULL;
1242 dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL;
1243 dual_timestamp userspace_timestamp = DUAL_TIMESTAMP_NULL;
1244 dual_timestamp kernel_timestamp = DUAL_TIMESTAMP_NULL;
1245 dual_timestamp security_start_timestamp = DUAL_TIMESTAMP_NULL;
1246 dual_timestamp security_finish_timestamp = DUAL_TIMESTAMP_NULL;
1247 static char systemd[] = "systemd";
1248 bool skip_setup = false;
1249 unsigned j;
1250 bool loaded_policy = false;
1251 bool arm_reboot_watchdog = false;
1252 bool queue_default_job = false;
1253 bool empty_etc = false;
1254 char *switch_root_dir = NULL, *switch_root_init = NULL;
1255 struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0);
1256 const char *error_message = NULL;
1257 uint8_t shutdown_exit_code = 0;
1258
1259 #ifdef HAVE_SYSV_COMPAT
1260 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1261 /* This is compatibility support for SysV, where
1262 * calling init as a user is identical to telinit. */
1263
1264 errno = -ENOENT;
1265 execv(SYSTEMCTL_BINARY_PATH, argv);
1266 log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1267 return 1;
1268 }
1269 #endif
1270
1271 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1272 dual_timestamp_get(&userspace_timestamp);
1273
1274 /* Determine if this is a reexecution or normal bootup. We do
1275 * the full command line parsing much later, so let's just
1276 * have a quick peek here. */
1277 if (strv_find(argv+1, "--deserialize"))
1278 skip_setup = true;
1279
1280 /* If we have switched root, do all the special setup
1281 * things */
1282 if (strv_find(argv+1, "--switched-root"))
1283 skip_setup = false;
1284
1285 /* If we get started via the /sbin/init symlink then we are
1286 called 'init'. After a subsequent reexecution we are then
1287 called 'systemd'. That is confusing, hence let's call us
1288 systemd right-away. */
1289 program_invocation_short_name = systemd;
1290 prctl(PR_SET_NAME, systemd);
1291
1292 saved_argv = argv;
1293 saved_argc = argc;
1294
1295 log_show_color(isatty(STDERR_FILENO) > 0);
1296 log_set_upgrade_syslog_to_journal(true);
1297
1298 /* Disable the umask logic */
1299 if (getpid() == 1)
1300 umask(0);
1301
1302 if (getpid() == 1 && detect_container() <= 0) {
1303
1304 /* Running outside of a container as PID 1 */
1305 arg_running_as = MANAGER_SYSTEM;
1306 make_null_stdio();
1307 log_set_target(LOG_TARGET_KMSG);
1308 log_open();
1309
1310 if (in_initrd())
1311 initrd_timestamp = userspace_timestamp;
1312
1313 if (!skip_setup) {
1314 mount_setup_early();
1315 dual_timestamp_get(&security_start_timestamp);
1316 if (mac_selinux_setup(&loaded_policy) < 0) {
1317 error_message = "Failed to load SELinux policy";
1318 goto finish;
1319 } else if (ima_setup() < 0) {
1320 error_message = "Failed to load IMA policy";
1321 goto finish;
1322 } else if (mac_smack_setup(&loaded_policy) < 0) {
1323 error_message = "Failed to load SMACK policy";
1324 goto finish;
1325 }
1326 dual_timestamp_get(&security_finish_timestamp);
1327 }
1328
1329 if (mac_selinux_init(NULL) < 0) {
1330 error_message = "Failed to initialize SELinux policy";
1331 goto finish;
1332 }
1333
1334 if (!skip_setup) {
1335 if (clock_is_localtime() > 0) {
1336 int min;
1337
1338 /*
1339 * The very first call of settimeofday() also does a time warp in the kernel.
1340 *
1341 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1342 * external tools to take care of maintaining the RTC and do all adjustments.
1343 * This matches the behavior of Windows, which leaves the RTC alone if the
1344 * registry tells that the RTC runs in UTC.
1345 */
1346 r = clock_set_timezone(&min);
1347 if (r < 0)
1348 log_error_errno(r, "Failed to apply local time delta, ignoring: %m");
1349 else
1350 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1351 } else if (!in_initrd()) {
1352 /*
1353 * Do a dummy very first call to seal the kernel's time warp magic.
1354 *
1355 * Do not call this this from inside the initrd. The initrd might not
1356 * carry /etc/adjtime with LOCAL, but the real system could be set up
1357 * that way. In such case, we need to delay the time-warp or the sealing
1358 * until we reach the real system.
1359 *
1360 * Do no set the kernel's timezone. The concept of local time cannot
1361 * be supported reliably, the time will jump or be incorrect at every daylight
1362 * saving time change. All kernel local time concepts will be treated
1363 * as UTC that way.
1364 */
1365 clock_reset_timewarp();
1366 }
1367 }
1368
1369 /* Set the default for later on, but don't actually
1370 * open the logs like this for now. Note that if we
1371 * are transitioning from the initrd there might still
1372 * be journal fd open, and we shouldn't attempt
1373 * opening that before we parsed /proc/cmdline which
1374 * might redirect output elsewhere. */
1375 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1376
1377 } else if (getpid() == 1) {
1378 /* Running inside a container, as PID 1 */
1379 arg_running_as = MANAGER_SYSTEM;
1380 log_set_target(LOG_TARGET_CONSOLE);
1381 log_close_console(); /* force reopen of /dev/console */
1382 log_open();
1383
1384 /* For the later on, see above... */
1385 log_set_target(LOG_TARGET_JOURNAL);
1386
1387 /* clear the kernel timestamp,
1388 * because we are in a container */
1389 kernel_timestamp.monotonic = 0ULL;
1390 kernel_timestamp.realtime = 0ULL;
1391
1392 } else {
1393 /* Running as user instance */
1394 arg_running_as = MANAGER_USER;
1395 log_set_target(LOG_TARGET_AUTO);
1396 log_open();
1397
1398 /* clear the kernel timestamp,
1399 * because we are not PID 1 */
1400 kernel_timestamp = DUAL_TIMESTAMP_NULL;
1401 }
1402
1403 /* Initialize default unit */
1404 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1405 if (r < 0) {
1406 log_emergency_errno(r, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET);
1407 error_message = "Failed to set default unit";
1408 goto finish;
1409 }
1410
1411 r = initialize_join_controllers();
1412 if (r < 0) {
1413 error_message = "Failed to initialize cgroup controllers";
1414 goto finish;
1415 }
1416
1417 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1418 * /proc/$PID/fd is available. */
1419 if (getpid() == 1) {
1420
1421 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1422 if (!skip_setup)
1423 kmod_setup();
1424
1425 r = mount_setup(loaded_policy);
1426 if (r < 0) {
1427 error_message = "Failed to mount API filesystems";
1428 goto finish;
1429 }
1430 }
1431
1432 /* Reset all signal handlers. */
1433 (void) reset_all_signal_handlers();
1434 (void) ignore_signals(SIGNALS_IGNORE, -1);
1435
1436 if (parse_config_file() < 0) {
1437 error_message = "Failed to parse config file";
1438 goto finish;
1439 }
1440
1441 if (arg_running_as == MANAGER_SYSTEM) {
1442 r = parse_proc_cmdline(parse_proc_cmdline_item);
1443 if (r < 0)
1444 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
1445 }
1446
1447 /* Note that this also parses bits from the kernel command
1448 * line, including "debug". */
1449 log_parse_environment();
1450
1451 if (parse_argv(argc, argv) < 0) {
1452 error_message = "Failed to parse commandline arguments";
1453 goto finish;
1454 }
1455
1456 if (arg_action == ACTION_TEST &&
1457 geteuid() == 0) {
1458 log_error("Don't run test mode as root.");
1459 goto finish;
1460 }
1461
1462 if (arg_running_as == MANAGER_USER &&
1463 arg_action == ACTION_RUN &&
1464 sd_booted() <= 0) {
1465 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1466 goto finish;
1467 }
1468
1469 if (arg_running_as == MANAGER_SYSTEM &&
1470 arg_action == ACTION_RUN &&
1471 running_in_chroot() > 0) {
1472 log_error("Cannot be run in a chroot() environment.");
1473 goto finish;
1474 }
1475
1476 if (arg_action == ACTION_TEST)
1477 skip_setup = true;
1478
1479 pager_open_if_enabled();
1480
1481 if (arg_action == ACTION_HELP) {
1482 retval = help();
1483 goto finish;
1484 } else if (arg_action == ACTION_VERSION) {
1485 retval = version();
1486 goto finish;
1487 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1488 unit_dump_config_items(stdout);
1489 retval = EXIT_SUCCESS;
1490 goto finish;
1491 } else if (arg_action == ACTION_DONE) {
1492 retval = EXIT_SUCCESS;
1493 goto finish;
1494 }
1495
1496 if (arg_running_as == MANAGER_USER &&
1497 !getenv("XDG_RUNTIME_DIR")) {
1498 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1499 goto finish;
1500 }
1501
1502 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1503
1504 /* Close logging fds, in order not to confuse fdset below */
1505 log_close();
1506
1507 /* Remember open file descriptors for later deserialization */
1508 r = fdset_new_fill(&fds);
1509 if (r < 0) {
1510 log_emergency_errno(r, "Failed to allocate fd set: %m");
1511 error_message = "Failed to allocate fd set";
1512 goto finish;
1513 } else
1514 fdset_cloexec(fds, true);
1515
1516 if (arg_serialization)
1517 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1518
1519 if (arg_running_as == MANAGER_SYSTEM)
1520 /* Become a session leader if we aren't one yet. */
1521 setsid();
1522
1523 /* Move out of the way, so that we won't block unmounts */
1524 assert_se(chdir("/") == 0);
1525
1526 /* Reset the console, but only if this is really init and we
1527 * are freshly booted */
1528 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1529
1530 /* If we are init, we connect stdin/stdout/stderr to
1531 * /dev/null and make sure we don't have a controlling
1532 * tty. */
1533 release_terminal();
1534
1535 if (getpid() == 1 && !skip_setup)
1536 console_setup();
1537 }
1538
1539 /* Open the logging devices, if possible and necessary */
1540 log_open();
1541
1542 if (arg_show_status == _SHOW_STATUS_UNSET)
1543 arg_show_status = SHOW_STATUS_YES;
1544
1545 /* Make sure we leave a core dump without panicing the
1546 * kernel. */
1547 if (getpid() == 1) {
1548 install_crash_handler();
1549
1550 r = mount_cgroup_controllers(arg_join_controllers);
1551 if (r < 0)
1552 goto finish;
1553 }
1554
1555 if (arg_running_as == MANAGER_SYSTEM) {
1556 int v;
1557
1558 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1559 arg_action == ACTION_TEST ? "test " : "" );
1560
1561 v = detect_virtualization();
1562 if (v > 0)
1563 log_info("Detected virtualization %s.", virtualization_to_string(v));
1564
1565 write_container_id();
1566
1567 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1568
1569 if (in_initrd())
1570 log_info("Running in initial RAM disk.");
1571
1572 /* Let's check whether /etc is already populated. We
1573 * don't actually really check for that, but use
1574 * /etc/machine-id as flag file. This allows container
1575 * managers and installers to provision a couple of
1576 * files already. If the container manager wants to
1577 * provision the machine ID itself it should pass
1578 * $container_uuid to PID 1. */
1579
1580 empty_etc = access("/etc/machine-id", F_OK) < 0;
1581 if (empty_etc)
1582 log_info("Running with unpopulated /etc.");
1583 } else {
1584 _cleanup_free_ char *t;
1585
1586 t = uid_to_name(getuid());
1587 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1588 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1589 }
1590
1591 if (arg_running_as == MANAGER_SYSTEM && !skip_setup) {
1592 if (arg_show_status > 0)
1593 status_welcome();
1594
1595 hostname_setup();
1596 machine_id_setup(NULL);
1597 loopback_setup();
1598
1599 test_mtab();
1600 test_usr();
1601 }
1602
1603 if (arg_running_as == MANAGER_SYSTEM && arg_runtime_watchdog > 0)
1604 watchdog_set_timeout(&arg_runtime_watchdog);
1605
1606 if (arg_timer_slack_nsec != NSEC_INFINITY)
1607 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1608 log_error_errno(errno, "Failed to adjust timer slack: %m");
1609
1610 if (arg_capability_bounding_set_drop) {
1611 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1612 if (r < 0) {
1613 log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m");
1614 error_message = "Failed to drop capability bounding set of usermode helpers";
1615 goto finish;
1616 }
1617 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1618 if (r < 0) {
1619 log_emergency_errno(r, "Failed to drop capability bounding set: %m");
1620 error_message = "Failed to drop capability bounding set";
1621 goto finish;
1622 }
1623 }
1624
1625 if (arg_syscall_archs) {
1626 r = enforce_syscall_archs(arg_syscall_archs);
1627 if (r < 0) {
1628 error_message = "Failed to set syscall architectures";
1629 goto finish;
1630 }
1631 }
1632
1633 if (arg_running_as == MANAGER_USER)
1634 /* Become reaper of our children */
1635 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0)
1636 log_warning_errno(errno, "Failed to make us a subreaper: %m");
1637
1638 if (arg_running_as == MANAGER_SYSTEM) {
1639 bump_rlimit_nofile(&saved_rlimit_nofile);
1640
1641 if (empty_etc) {
1642 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_ENABLE_ONLY, false, NULL, 0);
1643 if (r < 0)
1644 log_warning_errno(r, "Failed to populate /etc with preset unit settings, ignoring: %m");
1645 else
1646 log_info("Populated /etc with preset unit settings.");
1647 }
1648 }
1649
1650 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1651 if (r < 0) {
1652 log_emergency_errno(r, "Failed to allocate manager object: %m");
1653 error_message = "Failed to allocate manager object";
1654 goto finish;
1655 }
1656
1657 m->confirm_spawn = arg_confirm_spawn;
1658 m->runtime_watchdog = arg_runtime_watchdog;
1659 m->shutdown_watchdog = arg_shutdown_watchdog;
1660 m->userspace_timestamp = userspace_timestamp;
1661 m->kernel_timestamp = kernel_timestamp;
1662 m->initrd_timestamp = initrd_timestamp;
1663 m->security_start_timestamp = security_start_timestamp;
1664 m->security_finish_timestamp = security_finish_timestamp;
1665
1666 manager_set_defaults(m);
1667 manager_set_show_status(m, arg_show_status);
1668 manager_set_first_boot(m, empty_etc);
1669
1670 /* Remember whether we should queue the default job */
1671 queue_default_job = !arg_serialization || arg_switched_root;
1672
1673 before_startup = now(CLOCK_MONOTONIC);
1674
1675 r = manager_startup(m, arg_serialization, fds);
1676 if (r < 0)
1677 log_error_errno(r, "Failed to fully start up daemon: %m");
1678
1679 /* This will close all file descriptors that were opened, but
1680 * not claimed by any unit. */
1681 fdset_free(fds);
1682 fds = NULL;
1683
1684 arg_serialization = safe_fclose(arg_serialization);
1685
1686 if (queue_default_job) {
1687 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1688 Unit *target = NULL;
1689 Job *default_unit_job;
1690
1691 log_debug("Activating default unit: %s", arg_default_unit);
1692
1693 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1694 if (r < 0)
1695 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1696 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1697 log_error_errno(target->load_error, "Failed to load default target: %m");
1698 else if (target->load_state == UNIT_MASKED)
1699 log_error("Default target masked.");
1700
1701 if (!target || target->load_state != UNIT_LOADED) {
1702 log_info("Trying to load rescue target...");
1703
1704 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1705 if (r < 0) {
1706 log_emergency("Failed to load rescue target: %s", bus_error_message(&error, r));
1707 error_message = "Failed to load rescue target";
1708 goto finish;
1709 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1710 log_emergency_errno(target->load_error, "Failed to load rescue target: %m");
1711 error_message = "Failed to load rescue target";
1712 goto finish;
1713 } else if (target->load_state == UNIT_MASKED) {
1714 log_emergency("Rescue target masked.");
1715 error_message = "Rescue target masked";
1716 goto finish;
1717 }
1718 }
1719
1720 assert(target->load_state == UNIT_LOADED);
1721
1722 if (arg_action == ACTION_TEST) {
1723 printf("-> By units:\n");
1724 manager_dump_units(m, stdout, "\t");
1725 }
1726
1727 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1728 if (r == -EPERM) {
1729 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1730
1731 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1732 if (r < 0) {
1733 log_emergency("Failed to start default target: %s", bus_error_message(&error, r));
1734 error_message = "Failed to start default target";
1735 goto finish;
1736 }
1737 } else if (r < 0) {
1738 log_emergency("Failed to isolate default target: %s", bus_error_message(&error, r));
1739 error_message = "Failed to isolate default target";
1740 goto finish;
1741 }
1742
1743 m->default_unit_job_id = default_unit_job->id;
1744
1745 after_startup = now(CLOCK_MONOTONIC);
1746 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1747 "Loaded units and determined initial transaction in %s.",
1748 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
1749
1750 if (arg_action == ACTION_TEST) {
1751 printf("-> By jobs:\n");
1752 manager_dump_jobs(m, stdout, "\t");
1753 retval = EXIT_SUCCESS;
1754 goto finish;
1755 }
1756 }
1757
1758 for (;;) {
1759 r = manager_loop(m);
1760 if (r < 0) {
1761 log_emergency_errno(r, "Failed to run main loop: %m");
1762 error_message = "Failed to run main loop";
1763 goto finish;
1764 }
1765
1766 switch (m->exit_code) {
1767
1768 case MANAGER_RELOAD:
1769 log_info("Reloading.");
1770
1771 r = parse_config_file();
1772 if (r < 0)
1773 log_error("Failed to parse config file.");
1774
1775 manager_set_defaults(m);
1776
1777 r = manager_reload(m);
1778 if (r < 0)
1779 log_error_errno(r, "Failed to reload: %m");
1780 break;
1781
1782 case MANAGER_REEXECUTE:
1783
1784 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0) {
1785 error_message = "Failed to prepare for reexecution";
1786 goto finish;
1787 }
1788
1789 reexecute = true;
1790 log_notice("Reexecuting.");
1791 goto finish;
1792
1793 case MANAGER_SWITCH_ROOT:
1794 /* Steal the switch root parameters */
1795 switch_root_dir = m->switch_root;
1796 switch_root_init = m->switch_root_init;
1797 m->switch_root = m->switch_root_init = NULL;
1798
1799 if (!switch_root_init)
1800 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0) {
1801 error_message = "Failed to prepare for reexecution";
1802 goto finish;
1803 }
1804
1805 reexecute = true;
1806 log_notice("Switching root.");
1807 goto finish;
1808
1809 case MANAGER_EXIT:
1810 if (m->running_as == MANAGER_USER) {
1811 retval = EXIT_SUCCESS;
1812 log_debug("Exit.");
1813 goto finish;
1814 }
1815
1816 /* fallthrough */
1817 case MANAGER_REBOOT:
1818 case MANAGER_POWEROFF:
1819 case MANAGER_HALT:
1820 case MANAGER_KEXEC: {
1821 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1822 [MANAGER_EXIT] = "exit",
1823 [MANAGER_REBOOT] = "reboot",
1824 [MANAGER_POWEROFF] = "poweroff",
1825 [MANAGER_HALT] = "halt",
1826 [MANAGER_KEXEC] = "kexec"
1827 };
1828
1829 assert_se(shutdown_verb = table[m->exit_code]);
1830 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1831
1832 log_notice("Shutting down.");
1833 goto finish;
1834 }
1835
1836 default:
1837 assert_not_reached("Unknown exit code.");
1838 }
1839 }
1840
1841 finish:
1842 pager_close();
1843
1844 if (m) {
1845 arg_shutdown_watchdog = m->shutdown_watchdog;
1846 shutdown_exit_code = m->return_value;
1847 }
1848 m = manager_free(m);
1849
1850 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++)
1851 arg_default_rlimit[j] = mfree(arg_default_rlimit[j]);
1852
1853 arg_default_unit = mfree(arg_default_unit);
1854
1855 free_join_controllers();
1856
1857 arg_default_environment = strv_free(arg_default_environment);
1858
1859 arg_syscall_archs = set_free(arg_syscall_archs);
1860
1861 mac_selinux_finish();
1862
1863 if (reexecute) {
1864 const char **args;
1865 unsigned i, args_size;
1866
1867 /* Close and disarm the watchdog, so that the new
1868 * instance can reinitialize it, but doesn't get
1869 * rebooted while we do that */
1870 watchdog_close(true);
1871
1872 /* Reset the RLIMIT_NOFILE to the kernel default, so
1873 * that the new systemd can pass the kernel default to
1874 * its child processes */
1875 if (saved_rlimit_nofile.rlim_cur > 0)
1876 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1877
1878 if (switch_root_dir) {
1879 /* Kill all remaining processes from the
1880 * initrd, but don't wait for them, so that we
1881 * can handle the SIGCHLD for them after
1882 * deserializing. */
1883 broadcast_signal(SIGTERM, false, true);
1884
1885 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1886 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1887 if (r < 0)
1888 log_error_errno(r, "Failed to switch root, trying to continue: %m");
1889 }
1890
1891 args_size = MAX(6, argc+1);
1892 args = newa(const char*, args_size);
1893
1894 if (!switch_root_init) {
1895 char sfd[DECIMAL_STR_MAX(int) + 1];
1896
1897 /* First try to spawn ourselves with the right
1898 * path, and with full serialization. We do
1899 * this only if the user didn't specify an
1900 * explicit init to spawn. */
1901
1902 assert(arg_serialization);
1903 assert(fds);
1904
1905 xsprintf(sfd, "%i", fileno(arg_serialization));
1906
1907 i = 0;
1908 args[i++] = SYSTEMD_BINARY_PATH;
1909 if (switch_root_dir)
1910 args[i++] = "--switched-root";
1911 args[i++] = arg_running_as == MANAGER_SYSTEM ? "--system" : "--user";
1912 args[i++] = "--deserialize";
1913 args[i++] = sfd;
1914 args[i++] = NULL;
1915
1916 /* do not pass along the environment we inherit from the kernel or initrd */
1917 if (switch_root_dir)
1918 clearenv();
1919
1920 assert(i <= args_size);
1921 execv(args[0], (char* const*) args);
1922 }
1923
1924 /* Try the fallback, if there is any, without any
1925 * serialization. We pass the original argv[] and
1926 * envp[]. (Well, modulo the ordering changes due to
1927 * getopt() in argv[], and some cleanups in envp[],
1928 * but let's hope that doesn't matter.) */
1929
1930 arg_serialization = safe_fclose(arg_serialization);
1931
1932 if (fds) {
1933 fdset_free(fds);
1934 fds = NULL;
1935 }
1936
1937 /* Reopen the console */
1938 make_console_stdio();
1939
1940 for (j = 1, i = 1; j < (unsigned) argc; j++)
1941 args[i++] = argv[j];
1942 args[i++] = NULL;
1943 assert(i <= args_size);
1944
1945 /* Reenable any blocked signals, especially important
1946 * if we switch from initial ramdisk to init=... */
1947 (void) reset_all_signal_handlers();
1948 (void) reset_signal_mask();
1949
1950 if (switch_root_init) {
1951 args[0] = switch_root_init;
1952 execv(args[0], (char* const*) args);
1953 log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");
1954 }
1955
1956 args[0] = "/sbin/init";
1957 execv(args[0], (char* const*) args);
1958
1959 if (errno == ENOENT) {
1960 log_warning("No /sbin/init, trying fallback");
1961
1962 args[0] = "/bin/sh";
1963 args[1] = NULL;
1964 execv(args[0], (char* const*) args);
1965 log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m");
1966 } else
1967 log_warning_errno(errno, "Failed to execute /sbin/init, giving up: %m");
1968 }
1969
1970 arg_serialization = safe_fclose(arg_serialization);
1971
1972 if (fds) {
1973 fdset_free(fds);
1974 fds = NULL;
1975 }
1976
1977 #ifdef HAVE_VALGRIND_VALGRIND_H
1978 /* If we are PID 1 and running under valgrind, then let's exit
1979 * here explicitly. valgrind will only generate nice output on
1980 * exit(), not on exec(), hence let's do the former not the
1981 * latter here. */
1982 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1983 return 0;
1984 #endif
1985
1986 if (shutdown_verb) {
1987 char log_level[DECIMAL_STR_MAX(int) + 1];
1988 char exit_code[DECIMAL_STR_MAX(uint8_t) + 1];
1989 const char* command_line[11] = {
1990 SYSTEMD_SHUTDOWN_BINARY_PATH,
1991 shutdown_verb,
1992 "--log-level", log_level,
1993 "--log-target",
1994 };
1995 unsigned pos = 5;
1996 _cleanup_strv_free_ char **env_block = NULL;
1997
1998 assert(command_line[pos] == NULL);
1999 env_block = strv_copy(environ);
2000
2001 xsprintf(log_level, "%d", log_get_max_level());
2002
2003 switch (log_get_target()) {
2004 case LOG_TARGET_KMSG:
2005 case LOG_TARGET_JOURNAL_OR_KMSG:
2006 case LOG_TARGET_SYSLOG_OR_KMSG:
2007 command_line[pos++] = "kmsg";
2008 break;
2009
2010 case LOG_TARGET_NULL:
2011 command_line[pos++] = "null";
2012 break;
2013
2014 case LOG_TARGET_CONSOLE:
2015 default:
2016 command_line[pos++] = "console";
2017 break;
2018 };
2019
2020 if (log_get_show_color())
2021 command_line[pos++] = "--log-color";
2022
2023 if (log_get_show_location())
2024 command_line[pos++] = "--log-location";
2025
2026 if (streq(shutdown_verb, "exit")) {
2027 command_line[pos++] = "--exit-code";
2028 command_line[pos++] = exit_code;
2029 xsprintf(exit_code, "%d", shutdown_exit_code);
2030 }
2031
2032 assert(pos < ELEMENTSOF(command_line));
2033
2034 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2035 char *e;
2036
2037 /* If we reboot let's set the shutdown
2038 * watchdog and tell the shutdown binary to
2039 * repeatedly ping it */
2040 r = watchdog_set_timeout(&arg_shutdown_watchdog);
2041 watchdog_close(r < 0);
2042
2043 /* Tell the binary how often to ping, ignore failure */
2044 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2045 strv_push(&env_block, e);
2046 } else
2047 watchdog_close(true);
2048
2049 /* Avoid the creation of new processes forked by the
2050 * kernel; at this point, we will not listen to the
2051 * signals anyway */
2052 if (detect_container() <= 0)
2053 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2054
2055 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2056 log_error_errno(errno, "Failed to execute shutdown binary, %s: %m",
2057 getpid() == 1 ? "freezing" : "quitting");
2058 }
2059
2060 if (getpid() == 1) {
2061 if (error_message)
2062 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
2063 ANSI_HIGHLIGHT_RED "!!!!!!" ANSI_NORMAL,
2064 "%s, freezing.", error_message);
2065 freeze();
2066 }
2067
2068 return retval;
2069 }
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