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