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Merge pull request #1213 from evverx/systemd-notify-log
[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() > 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 safe_fclose(arg_serialization);
922
923 arg_serialization = f;
924
925 break;
926 }
927
928 case ARG_SWITCHED_ROOT:
929 arg_switched_root = true;
930 break;
931
932 case 'h':
933 arg_action = ACTION_HELP;
934 if (arg_no_pager < 0)
935 arg_no_pager = true;
936 break;
937
938 case 'D':
939 log_set_max_level(LOG_DEBUG);
940 break;
941
942 case 'b':
943 case 's':
944 case 'z':
945 /* Just to eat away the sysvinit kernel
946 * cmdline args without getopt() error
947 * messages that we'll parse in
948 * parse_proc_cmdline_word() or ignore. */
949
950 case '?':
951 if (getpid() != 1)
952 return -EINVAL;
953 else
954 return 0;
955
956 default:
957 assert_not_reached("Unhandled option code.");
958 }
959
960 if (optind < argc && getpid() != 1) {
961 /* Hmm, when we aren't run as init system
962 * let's complain about excess arguments */
963
964 log_error("Excess arguments.");
965 return -EINVAL;
966 }
967
968 return 0;
969 }
970
971 static int help(void) {
972
973 printf("%s [OPTIONS...]\n\n"
974 "Starts up and maintains the system or user services.\n\n"
975 " -h --help Show this help\n"
976 " --test Determine startup sequence, dump it and exit\n"
977 " --no-pager Do not pipe output into a pager\n"
978 " --dump-configuration-items Dump understood unit configuration items\n"
979 " --unit=UNIT Set default unit\n"
980 " --system Run a system instance, even if PID != 1\n"
981 " --user Run a user instance\n"
982 " --dump-core[=0|1] Dump core on crash\n"
983 " --crash-shell[=0|1] Run shell on crash\n"
984 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
985 " --show-status[=0|1] Show status updates on the console during bootup\n"
986 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
987 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
988 " --log-color[=0|1] Highlight important log messages\n"
989 " --log-location[=0|1] Include code location in log messages\n"
990 " --default-standard-output= Set default standard output for services\n"
991 " --default-standard-error= Set default standard error output for services\n",
992 program_invocation_short_name);
993
994 return 0;
995 }
996
997 static int version(void) {
998 puts(PACKAGE_STRING);
999 puts(SYSTEMD_FEATURES);
1000
1001 return 0;
1002 }
1003
1004 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1005 FILE *f = NULL;
1006 FDSet *fds = NULL;
1007 int r;
1008
1009 assert(m);
1010 assert(_f);
1011 assert(_fds);
1012
1013 r = manager_open_serialization(m, &f);
1014 if (r < 0) {
1015 log_error_errno(r, "Failed to create serialization file: %m");
1016 goto fail;
1017 }
1018
1019 /* Make sure nothing is really destructed when we shut down */
1020 m->n_reloading ++;
1021 bus_manager_send_reloading(m, true);
1022
1023 fds = fdset_new();
1024 if (!fds) {
1025 r = -ENOMEM;
1026 log_error_errno(r, "Failed to allocate fd set: %m");
1027 goto fail;
1028 }
1029
1030 r = manager_serialize(m, f, fds, switching_root);
1031 if (r < 0) {
1032 log_error_errno(r, "Failed to serialize state: %m");
1033 goto fail;
1034 }
1035
1036 if (fseeko(f, 0, SEEK_SET) < 0) {
1037 log_error_errno(errno, "Failed to rewind serialization fd: %m");
1038 goto fail;
1039 }
1040
1041 r = fd_cloexec(fileno(f), false);
1042 if (r < 0) {
1043 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m");
1044 goto fail;
1045 }
1046
1047 r = fdset_cloexec(fds, false);
1048 if (r < 0) {
1049 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m");
1050 goto fail;
1051 }
1052
1053 *_f = f;
1054 *_fds = fds;
1055
1056 return 0;
1057
1058 fail:
1059 fdset_free(fds);
1060
1061 safe_fclose(f);
1062
1063 return r;
1064 }
1065
1066 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1067 struct rlimit nl;
1068 int r;
1069
1070 assert(saved_rlimit);
1071
1072 /* Save the original RLIMIT_NOFILE so that we can reset it
1073 * later when transitioning from the initrd to the main
1074 * systemd or suchlike. */
1075 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0)
1076 return log_error_errno(errno, "Reading RLIMIT_NOFILE failed: %m");
1077
1078 /* Make sure forked processes get the default kernel setting */
1079 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1080 struct rlimit *rl;
1081
1082 rl = newdup(struct rlimit, saved_rlimit, 1);
1083 if (!rl)
1084 return log_oom();
1085
1086 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1087 }
1088
1089 /* Bump up the resource limit for ourselves substantially */
1090 nl.rlim_cur = nl.rlim_max = 64*1024;
1091 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1092 if (r < 0)
1093 return log_error_errno(r, "Setting RLIMIT_NOFILE failed: %m");
1094
1095 return 0;
1096 }
1097
1098 static void test_mtab(void) {
1099
1100 static const char ok[] =
1101 "/proc/self/mounts\0"
1102 "/proc/mounts\0"
1103 "../proc/self/mounts\0"
1104 "../proc/mounts\0";
1105
1106 _cleanup_free_ char *p = NULL;
1107 int r;
1108
1109 /* Check that /etc/mtab is a symlink to the right place or
1110 * non-existing. But certainly not a file, or a symlink to
1111 * some weird place... */
1112
1113 r = readlink_malloc("/etc/mtab", &p);
1114 if (r == -ENOENT)
1115 return;
1116 if (r >= 0 && nulstr_contains(ok, p))
1117 return;
1118
1119 log_error("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1120 "This is not supported anymore. "
1121 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1122 freeze();
1123 }
1124
1125 static void test_usr(void) {
1126
1127 /* Check that /usr is not a separate fs */
1128
1129 if (dir_is_empty("/usr") <= 0)
1130 return;
1131
1132 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
1133 "Some things will probably break (sometimes even silently) in mysterious ways. "
1134 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1135 }
1136
1137 static int initialize_join_controllers(void) {
1138 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1139 * + "net_prio". We'd like to add "cpuset" to the mix, but
1140 * "cpuset" doesn't really work for groups with no initialized
1141 * attributes. */
1142
1143 arg_join_controllers = new(char**, 3);
1144 if (!arg_join_controllers)
1145 return -ENOMEM;
1146
1147 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1148 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1149 arg_join_controllers[2] = NULL;
1150
1151 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1152 free_join_controllers();
1153 return -ENOMEM;
1154 }
1155
1156 return 0;
1157 }
1158
1159 static int enforce_syscall_archs(Set *archs) {
1160 #ifdef HAVE_SECCOMP
1161 scmp_filter_ctx *seccomp;
1162 Iterator i;
1163 void *id;
1164 int r;
1165
1166 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1167 if (!seccomp)
1168 return log_oom();
1169
1170 SET_FOREACH(id, arg_syscall_archs, i) {
1171 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1172 if (r == -EEXIST)
1173 continue;
1174 if (r < 0) {
1175 log_error_errno(r, "Failed to add architecture to seccomp: %m");
1176 goto finish;
1177 }
1178 }
1179
1180 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1181 if (r < 0) {
1182 log_error_errno(r, "Failed to unset NO_NEW_PRIVS: %m");
1183 goto finish;
1184 }
1185
1186 r = seccomp_load(seccomp);
1187 if (r < 0)
1188 log_error_errno(r, "Failed to add install architecture seccomp: %m");
1189
1190 finish:
1191 seccomp_release(seccomp);
1192 return r;
1193 #else
1194 return 0;
1195 #endif
1196 }
1197
1198 static int status_welcome(void) {
1199 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1200 int r;
1201
1202 r = parse_env_file("/etc/os-release", NEWLINE,
1203 "PRETTY_NAME", &pretty_name,
1204 "ANSI_COLOR", &ansi_color,
1205 NULL);
1206 if (r == -ENOENT)
1207 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1208 "PRETTY_NAME", &pretty_name,
1209 "ANSI_COLOR", &ansi_color,
1210 NULL);
1211
1212 if (r < 0 && r != -ENOENT)
1213 log_warning_errno(r, "Failed to read os-release file: %m");
1214
1215 return status_printf(NULL, false, false,
1216 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1217 isempty(ansi_color) ? "1" : ansi_color,
1218 isempty(pretty_name) ? "Linux" : pretty_name);
1219 }
1220
1221 static int write_container_id(void) {
1222 const char *c;
1223
1224 c = getenv("container");
1225 if (isempty(c))
1226 return 0;
1227
1228 return write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE);
1229 }
1230
1231 int main(int argc, char *argv[]) {
1232 Manager *m = NULL;
1233 int r, retval = EXIT_FAILURE;
1234 usec_t before_startup, after_startup;
1235 char timespan[FORMAT_TIMESPAN_MAX];
1236 FDSet *fds = NULL;
1237 bool reexecute = false;
1238 const char *shutdown_verb = NULL;
1239 dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL;
1240 dual_timestamp userspace_timestamp = DUAL_TIMESTAMP_NULL;
1241 dual_timestamp kernel_timestamp = DUAL_TIMESTAMP_NULL;
1242 dual_timestamp security_start_timestamp = DUAL_TIMESTAMP_NULL;
1243 dual_timestamp security_finish_timestamp = DUAL_TIMESTAMP_NULL;
1244 static char systemd[] = "systemd";
1245 bool skip_setup = false;
1246 unsigned j;
1247 bool loaded_policy = false;
1248 bool arm_reboot_watchdog = false;
1249 bool queue_default_job = false;
1250 bool empty_etc = false;
1251 char *switch_root_dir = NULL, *switch_root_init = NULL;
1252 struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0);
1253 const char *error_message = NULL;
1254
1255 #ifdef HAVE_SYSV_COMPAT
1256 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1257 /* This is compatibility support for SysV, where
1258 * calling init as a user is identical to telinit. */
1259
1260 errno = -ENOENT;
1261 execv(SYSTEMCTL_BINARY_PATH, argv);
1262 log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1263 return 1;
1264 }
1265 #endif
1266
1267 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1268 dual_timestamp_get(&userspace_timestamp);
1269
1270 /* Determine if this is a reexecution or normal bootup. We do
1271 * the full command line parsing much later, so let's just
1272 * have a quick peek here. */
1273 if (strv_find(argv+1, "--deserialize"))
1274 skip_setup = true;
1275
1276 /* If we have switched root, do all the special setup
1277 * things */
1278 if (strv_find(argv+1, "--switched-root"))
1279 skip_setup = false;
1280
1281 /* If we get started via the /sbin/init symlink then we are
1282 called 'init'. After a subsequent reexecution we are then
1283 called 'systemd'. That is confusing, hence let's call us
1284 systemd right-away. */
1285 program_invocation_short_name = systemd;
1286 prctl(PR_SET_NAME, systemd);
1287
1288 saved_argv = argv;
1289 saved_argc = argc;
1290
1291 log_show_color(isatty(STDERR_FILENO) > 0);
1292 log_set_upgrade_syslog_to_journal(true);
1293
1294 /* Disable the umask logic */
1295 if (getpid() == 1)
1296 umask(0);
1297
1298 if (getpid() == 1 && detect_container() <= 0) {
1299
1300 /* Running outside of a container as PID 1 */
1301 arg_running_as = MANAGER_SYSTEM;
1302 make_null_stdio();
1303 log_set_target(LOG_TARGET_KMSG);
1304 log_open();
1305
1306 if (in_initrd())
1307 initrd_timestamp = userspace_timestamp;
1308
1309 if (!skip_setup) {
1310 mount_setup_early();
1311 dual_timestamp_get(&security_start_timestamp);
1312 if (mac_selinux_setup(&loaded_policy) < 0) {
1313 error_message = "Failed to load SELinux policy";
1314 goto finish;
1315 } else if (ima_setup() < 0) {
1316 error_message = "Failed to load IMA policy";
1317 goto finish;
1318 } else if (mac_smack_setup(&loaded_policy) < 0) {
1319 error_message = "Failed to load SMACK policy";
1320 goto finish;
1321 }
1322 dual_timestamp_get(&security_finish_timestamp);
1323 }
1324
1325 if (mac_selinux_init(NULL) < 0) {
1326 error_message = "Failed to initialize SELinux policy";
1327 goto finish;
1328 }
1329
1330 if (!skip_setup) {
1331 if (clock_is_localtime() > 0) {
1332 int min;
1333
1334 /*
1335 * The very first call of settimeofday() also does a time warp in the kernel.
1336 *
1337 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1338 * external tools to take care of maintaining the RTC and do all adjustments.
1339 * This matches the behavior of Windows, which leaves the RTC alone if the
1340 * registry tells that the RTC runs in UTC.
1341 */
1342 r = clock_set_timezone(&min);
1343 if (r < 0)
1344 log_error_errno(r, "Failed to apply local time delta, ignoring: %m");
1345 else
1346 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1347 } else if (!in_initrd()) {
1348 /*
1349 * Do a dummy very first call to seal the kernel's time warp magic.
1350 *
1351 * Do not call this this from inside the initrd. The initrd might not
1352 * carry /etc/adjtime with LOCAL, but the real system could be set up
1353 * that way. In such case, we need to delay the time-warp or the sealing
1354 * until we reach the real system.
1355 *
1356 * Do no set the kernel's timezone. The concept of local time cannot
1357 * be supported reliably, the time will jump or be incorrect at every daylight
1358 * saving time change. All kernel local time concepts will be treated
1359 * as UTC that way.
1360 */
1361 clock_reset_timewarp();
1362 }
1363 }
1364
1365 /* Set the default for later on, but don't actually
1366 * open the logs like this for now. Note that if we
1367 * are transitioning from the initrd there might still
1368 * be journal fd open, and we shouldn't attempt
1369 * opening that before we parsed /proc/cmdline which
1370 * might redirect output elsewhere. */
1371 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1372
1373 } else if (getpid() == 1) {
1374 /* Running inside a container, as PID 1 */
1375 arg_running_as = MANAGER_SYSTEM;
1376 log_set_target(LOG_TARGET_CONSOLE);
1377 log_close_console(); /* force reopen of /dev/console */
1378 log_open();
1379
1380 /* For the later on, see above... */
1381 log_set_target(LOG_TARGET_JOURNAL);
1382
1383 /* clear the kernel timestamp,
1384 * because we are in a container */
1385 kernel_timestamp.monotonic = 0ULL;
1386 kernel_timestamp.realtime = 0ULL;
1387
1388 } else {
1389 /* Running as user instance */
1390 arg_running_as = MANAGER_USER;
1391 log_set_target(LOG_TARGET_AUTO);
1392 log_open();
1393
1394 /* clear the kernel timestamp,
1395 * because we are not PID 1 */
1396 kernel_timestamp = DUAL_TIMESTAMP_NULL;
1397 }
1398
1399 /* Initialize default unit */
1400 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1401 if (r < 0) {
1402 log_emergency_errno(r, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET);
1403 error_message = "Failed to set default unit";
1404 goto finish;
1405 }
1406
1407 r = initialize_join_controllers();
1408 if (r < 0) {
1409 error_message = "Failed to initialize cgroup controllers";
1410 goto finish;
1411 }
1412
1413 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1414 * /proc/$PID/fd is available. */
1415 if (getpid() == 1) {
1416
1417 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1418 if (!skip_setup)
1419 kmod_setup();
1420
1421 r = mount_setup(loaded_policy);
1422 if (r < 0) {
1423 error_message = "Failed to mount API filesystems";
1424 goto finish;
1425 }
1426 }
1427
1428 /* Reset all signal handlers. */
1429 (void) reset_all_signal_handlers();
1430 (void) ignore_signals(SIGNALS_IGNORE, -1);
1431
1432 if (parse_config_file() < 0) {
1433 error_message = "Failed to parse config file";
1434 goto finish;
1435 }
1436
1437 if (arg_running_as == MANAGER_SYSTEM) {
1438 r = parse_proc_cmdline(parse_proc_cmdline_item);
1439 if (r < 0)
1440 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
1441 }
1442
1443 /* Note that this also parses bits from the kernel command
1444 * line, including "debug". */
1445 log_parse_environment();
1446
1447 if (parse_argv(argc, argv) < 0) {
1448 error_message = "Failed to parse commandline arguments";
1449 goto finish;
1450 }
1451
1452 if (arg_action == ACTION_TEST &&
1453 geteuid() == 0) {
1454 log_error("Don't run test mode as root.");
1455 goto finish;
1456 }
1457
1458 if (arg_running_as == MANAGER_USER &&
1459 arg_action == ACTION_RUN &&
1460 sd_booted() <= 0) {
1461 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1462 goto finish;
1463 }
1464
1465 if (arg_running_as == MANAGER_SYSTEM &&
1466 arg_action == ACTION_RUN &&
1467 running_in_chroot() > 0) {
1468 log_error("Cannot be run in a chroot() environment.");
1469 goto finish;
1470 }
1471
1472 if (arg_action == ACTION_TEST)
1473 skip_setup = true;
1474
1475 pager_open_if_enabled();
1476
1477 if (arg_action == ACTION_HELP) {
1478 retval = help();
1479 goto finish;
1480 } else if (arg_action == ACTION_VERSION) {
1481 retval = version();
1482 goto finish;
1483 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1484 unit_dump_config_items(stdout);
1485 retval = EXIT_SUCCESS;
1486 goto finish;
1487 } else if (arg_action == ACTION_DONE) {
1488 retval = EXIT_SUCCESS;
1489 goto finish;
1490 }
1491
1492 if (arg_running_as == MANAGER_USER &&
1493 !getenv("XDG_RUNTIME_DIR")) {
1494 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1495 goto finish;
1496 }
1497
1498 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1499
1500 /* Close logging fds, in order not to confuse fdset below */
1501 log_close();
1502
1503 /* Remember open file descriptors for later deserialization */
1504 r = fdset_new_fill(&fds);
1505 if (r < 0) {
1506 log_emergency_errno(r, "Failed to allocate fd set: %m");
1507 error_message = "Failed to allocate fd set";
1508 goto finish;
1509 } else
1510 fdset_cloexec(fds, true);
1511
1512 if (arg_serialization)
1513 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1514
1515 if (arg_running_as == MANAGER_SYSTEM)
1516 /* Become a session leader if we aren't one yet. */
1517 setsid();
1518
1519 /* Move out of the way, so that we won't block unmounts */
1520 assert_se(chdir("/") == 0);
1521
1522 /* Reset the console, but only if this is really init and we
1523 * are freshly booted */
1524 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1525
1526 /* If we are init, we connect stdin/stdout/stderr to
1527 * /dev/null and make sure we don't have a controlling
1528 * tty. */
1529 release_terminal();
1530
1531 if (getpid() == 1 && !skip_setup)
1532 console_setup();
1533 }
1534
1535 /* Open the logging devices, if possible and necessary */
1536 log_open();
1537
1538 if (arg_show_status == _SHOW_STATUS_UNSET)
1539 arg_show_status = SHOW_STATUS_YES;
1540
1541 /* Make sure we leave a core dump without panicing the
1542 * kernel. */
1543 if (getpid() == 1) {
1544 install_crash_handler();
1545
1546 r = mount_cgroup_controllers(arg_join_controllers);
1547 if (r < 0)
1548 goto finish;
1549 }
1550
1551 if (arg_running_as == MANAGER_SYSTEM) {
1552 int v;
1553
1554 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1555 arg_action == ACTION_TEST ? "test " : "" );
1556
1557 v = detect_virtualization();
1558 if (v > 0)
1559 log_info("Detected virtualization %s.", virtualization_to_string(v));
1560
1561 write_container_id();
1562
1563 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1564
1565 if (in_initrd())
1566 log_info("Running in initial RAM disk.");
1567
1568 /* Let's check whether /etc is already populated. We
1569 * don't actually really check for that, but use
1570 * /etc/machine-id as flag file. This allows container
1571 * managers and installers to provision a couple of
1572 * files already. If the container manager wants to
1573 * provision the machine ID itself it should pass
1574 * $container_uuid to PID 1. */
1575
1576 empty_etc = access("/etc/machine-id", F_OK) < 0;
1577 if (empty_etc)
1578 log_info("Running with unpopulated /etc.");
1579 } else {
1580 _cleanup_free_ char *t;
1581
1582 t = uid_to_name(getuid());
1583 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1584 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1585 }
1586
1587 if (arg_running_as == MANAGER_SYSTEM && !skip_setup) {
1588 if (arg_show_status > 0)
1589 status_welcome();
1590
1591 hostname_setup();
1592 machine_id_setup(NULL);
1593 loopback_setup();
1594
1595 test_mtab();
1596 test_usr();
1597 }
1598
1599 if (arg_running_as == MANAGER_SYSTEM && arg_runtime_watchdog > 0)
1600 watchdog_set_timeout(&arg_runtime_watchdog);
1601
1602 if (arg_timer_slack_nsec != NSEC_INFINITY)
1603 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1604 log_error_errno(errno, "Failed to adjust timer slack: %m");
1605
1606 if (arg_capability_bounding_set_drop) {
1607 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1608 if (r < 0) {
1609 log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m");
1610 error_message = "Failed to drop capability bounding set of usermode helpers";
1611 goto finish;
1612 }
1613 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1614 if (r < 0) {
1615 log_emergency_errno(r, "Failed to drop capability bounding set: %m");
1616 error_message = "Failed to drop capability bounding set";
1617 goto finish;
1618 }
1619 }
1620
1621 if (arg_syscall_archs) {
1622 r = enforce_syscall_archs(arg_syscall_archs);
1623 if (r < 0) {
1624 error_message = "Failed to set syscall architectures";
1625 goto finish;
1626 }
1627 }
1628
1629 if (arg_running_as == MANAGER_USER)
1630 /* Become reaper of our children */
1631 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0)
1632 log_warning_errno(errno, "Failed to make us a subreaper: %m");
1633
1634 if (arg_running_as == MANAGER_SYSTEM) {
1635 bump_rlimit_nofile(&saved_rlimit_nofile);
1636
1637 if (empty_etc) {
1638 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_ENABLE_ONLY, false, NULL, 0);
1639 if (r < 0)
1640 log_warning_errno(r, "Failed to populate /etc with preset unit settings, ignoring: %m");
1641 else
1642 log_info("Populated /etc with preset unit settings.");
1643 }
1644 }
1645
1646 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1647 if (r < 0) {
1648 log_emergency_errno(r, "Failed to allocate manager object: %m");
1649 error_message = "Failed to allocate manager object";
1650 goto finish;
1651 }
1652
1653 m->confirm_spawn = arg_confirm_spawn;
1654 m->runtime_watchdog = arg_runtime_watchdog;
1655 m->shutdown_watchdog = arg_shutdown_watchdog;
1656 m->userspace_timestamp = userspace_timestamp;
1657 m->kernel_timestamp = kernel_timestamp;
1658 m->initrd_timestamp = initrd_timestamp;
1659 m->security_start_timestamp = security_start_timestamp;
1660 m->security_finish_timestamp = security_finish_timestamp;
1661
1662 manager_set_defaults(m);
1663 manager_set_show_status(m, arg_show_status);
1664 manager_set_first_boot(m, empty_etc);
1665
1666 /* Remember whether we should queue the default job */
1667 queue_default_job = !arg_serialization || arg_switched_root;
1668
1669 before_startup = now(CLOCK_MONOTONIC);
1670
1671 r = manager_startup(m, arg_serialization, fds);
1672 if (r < 0)
1673 log_error_errno(r, "Failed to fully start up daemon: %m");
1674
1675 /* This will close all file descriptors that were opened, but
1676 * not claimed by any unit. */
1677 fdset_free(fds);
1678 fds = NULL;
1679
1680 arg_serialization = safe_fclose(arg_serialization);
1681
1682 if (queue_default_job) {
1683 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1684 Unit *target = NULL;
1685 Job *default_unit_job;
1686
1687 log_debug("Activating default unit: %s", arg_default_unit);
1688
1689 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1690 if (r < 0)
1691 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1692 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1693 log_error_errno(target->load_error, "Failed to load default target: %m");
1694 else if (target->load_state == UNIT_MASKED)
1695 log_error("Default target masked.");
1696
1697 if (!target || target->load_state != UNIT_LOADED) {
1698 log_info("Trying to load rescue target...");
1699
1700 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1701 if (r < 0) {
1702 log_emergency("Failed to load rescue target: %s", bus_error_message(&error, r));
1703 error_message = "Failed to load rescue target";
1704 goto finish;
1705 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1706 log_emergency_errno(target->load_error, "Failed to load rescue target: %m");
1707 error_message = "Failed to load rescue target";
1708 goto finish;
1709 } else if (target->load_state == UNIT_MASKED) {
1710 log_emergency("Rescue target masked.");
1711 error_message = "Rescue target masked";
1712 goto finish;
1713 }
1714 }
1715
1716 assert(target->load_state == UNIT_LOADED);
1717
1718 if (arg_action == ACTION_TEST) {
1719 printf("-> By units:\n");
1720 manager_dump_units(m, stdout, "\t");
1721 }
1722
1723 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1724 if (r == -EPERM) {
1725 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1726
1727 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1728 if (r < 0) {
1729 log_emergency("Failed to start default target: %s", bus_error_message(&error, r));
1730 error_message = "Failed to start default target";
1731 goto finish;
1732 }
1733 } else if (r < 0) {
1734 log_emergency("Failed to isolate default target: %s", bus_error_message(&error, r));
1735 error_message = "Failed to isolate default target";
1736 goto finish;
1737 }
1738
1739 m->default_unit_job_id = default_unit_job->id;
1740
1741 after_startup = now(CLOCK_MONOTONIC);
1742 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1743 "Loaded units and determined initial transaction in %s.",
1744 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
1745
1746 if (arg_action == ACTION_TEST) {
1747 printf("-> By jobs:\n");
1748 manager_dump_jobs(m, stdout, "\t");
1749 retval = EXIT_SUCCESS;
1750 goto finish;
1751 }
1752 }
1753
1754 for (;;) {
1755 r = manager_loop(m);
1756 if (r < 0) {
1757 log_emergency_errno(r, "Failed to run main loop: %m");
1758 error_message = "Failed to run main loop";
1759 goto finish;
1760 }
1761
1762 switch (m->exit_code) {
1763
1764 case MANAGER_EXIT:
1765 retval = EXIT_SUCCESS;
1766 log_debug("Exit.");
1767 goto finish;
1768
1769 case MANAGER_RELOAD:
1770 log_info("Reloading.");
1771
1772 r = parse_config_file();
1773 if (r < 0)
1774 log_error("Failed to parse config file.");
1775
1776 manager_set_defaults(m);
1777
1778 r = manager_reload(m);
1779 if (r < 0)
1780 log_error_errno(r, "Failed to reload: %m");
1781 break;
1782
1783 case MANAGER_REEXECUTE:
1784
1785 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0) {
1786 error_message = "Failed to prepare for reexecution";
1787 goto finish;
1788 }
1789
1790 reexecute = true;
1791 log_notice("Reexecuting.");
1792 goto finish;
1793
1794 case MANAGER_SWITCH_ROOT:
1795 /* Steal the switch root parameters */
1796 switch_root_dir = m->switch_root;
1797 switch_root_init = m->switch_root_init;
1798 m->switch_root = m->switch_root_init = NULL;
1799
1800 if (!switch_root_init)
1801 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0) {
1802 error_message = "Failed to prepare for reexecution";
1803 goto finish;
1804 }
1805
1806 reexecute = true;
1807 log_notice("Switching root.");
1808 goto finish;
1809
1810 case MANAGER_REBOOT:
1811 case MANAGER_POWEROFF:
1812 case MANAGER_HALT:
1813 case MANAGER_KEXEC: {
1814 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1815 [MANAGER_REBOOT] = "reboot",
1816 [MANAGER_POWEROFF] = "poweroff",
1817 [MANAGER_HALT] = "halt",
1818 [MANAGER_KEXEC] = "kexec"
1819 };
1820
1821 assert_se(shutdown_verb = table[m->exit_code]);
1822 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1823
1824 log_notice("Shutting down.");
1825 goto finish;
1826 }
1827
1828 default:
1829 assert_not_reached("Unknown exit code.");
1830 }
1831 }
1832
1833 finish:
1834 pager_close();
1835
1836 if (m)
1837 arg_shutdown_watchdog = m->shutdown_watchdog;
1838 m = manager_free(m);
1839
1840 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++)
1841 arg_default_rlimit[j] = mfree(arg_default_rlimit[j]);
1842
1843 arg_default_unit = mfree(arg_default_unit);
1844
1845 free_join_controllers();
1846
1847 arg_default_environment = strv_free(arg_default_environment);
1848
1849 set_free(arg_syscall_archs);
1850 arg_syscall_archs = NULL;
1851
1852 mac_selinux_finish();
1853
1854 if (reexecute) {
1855 const char **args;
1856 unsigned i, args_size;
1857
1858 /* Close and disarm the watchdog, so that the new
1859 * instance can reinitialize it, but doesn't get
1860 * rebooted while we do that */
1861 watchdog_close(true);
1862
1863 /* Reset the RLIMIT_NOFILE to the kernel default, so
1864 * that the new systemd can pass the kernel default to
1865 * its child processes */
1866 if (saved_rlimit_nofile.rlim_cur > 0)
1867 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1868
1869 if (switch_root_dir) {
1870 /* Kill all remaining processes from the
1871 * initrd, but don't wait for them, so that we
1872 * can handle the SIGCHLD for them after
1873 * deserializing. */
1874 broadcast_signal(SIGTERM, false, true);
1875
1876 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1877 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1878 if (r < 0)
1879 log_error_errno(r, "Failed to switch root, trying to continue: %m");
1880 }
1881
1882 args_size = MAX(6, argc+1);
1883 args = newa(const char*, args_size);
1884
1885 if (!switch_root_init) {
1886 char sfd[DECIMAL_STR_MAX(int) + 1];
1887
1888 /* First try to spawn ourselves with the right
1889 * path, and with full serialization. We do
1890 * this only if the user didn't specify an
1891 * explicit init to spawn. */
1892
1893 assert(arg_serialization);
1894 assert(fds);
1895
1896 xsprintf(sfd, "%i", fileno(arg_serialization));
1897
1898 i = 0;
1899 args[i++] = SYSTEMD_BINARY_PATH;
1900 if (switch_root_dir)
1901 args[i++] = "--switched-root";
1902 args[i++] = arg_running_as == MANAGER_SYSTEM ? "--system" : "--user";
1903 args[i++] = "--deserialize";
1904 args[i++] = sfd;
1905 args[i++] = NULL;
1906
1907 /* do not pass along the environment we inherit from the kernel or initrd */
1908 if (switch_root_dir)
1909 clearenv();
1910
1911 assert(i <= args_size);
1912 execv(args[0], (char* const*) args);
1913 }
1914
1915 /* Try the fallback, if there is any, without any
1916 * serialization. We pass the original argv[] and
1917 * envp[]. (Well, modulo the ordering changes due to
1918 * getopt() in argv[], and some cleanups in envp[],
1919 * but let's hope that doesn't matter.) */
1920
1921 arg_serialization = safe_fclose(arg_serialization);
1922
1923 if (fds) {
1924 fdset_free(fds);
1925 fds = NULL;
1926 }
1927
1928 /* Reopen the console */
1929 make_console_stdio();
1930
1931 for (j = 1, i = 1; j < (unsigned) argc; j++)
1932 args[i++] = argv[j];
1933 args[i++] = NULL;
1934 assert(i <= args_size);
1935
1936 /* Reenable any blocked signals, especially important
1937 * if we switch from initial ramdisk to init=... */
1938 (void) reset_all_signal_handlers();
1939 (void) reset_signal_mask();
1940
1941 if (switch_root_init) {
1942 args[0] = switch_root_init;
1943 execv(args[0], (char* const*) args);
1944 log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");
1945 }
1946
1947 args[0] = "/sbin/init";
1948 execv(args[0], (char* const*) args);
1949
1950 if (errno == ENOENT) {
1951 log_warning("No /sbin/init, trying fallback");
1952
1953 args[0] = "/bin/sh";
1954 args[1] = NULL;
1955 execv(args[0], (char* const*) args);
1956 log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m");
1957 } else
1958 log_warning_errno(errno, "Failed to execute /sbin/init, giving up: %m");
1959 }
1960
1961 arg_serialization = safe_fclose(arg_serialization);
1962
1963 if (fds) {
1964 fdset_free(fds);
1965 fds = NULL;
1966 }
1967
1968 #ifdef HAVE_VALGRIND_VALGRIND_H
1969 /* If we are PID 1 and running under valgrind, then let's exit
1970 * here explicitly. valgrind will only generate nice output on
1971 * exit(), not on exec(), hence let's do the former not the
1972 * latter here. */
1973 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1974 return 0;
1975 #endif
1976
1977 if (shutdown_verb) {
1978 char log_level[DECIMAL_STR_MAX(int) + 1];
1979 const char* command_line[9] = {
1980 SYSTEMD_SHUTDOWN_BINARY_PATH,
1981 shutdown_verb,
1982 "--log-level", log_level,
1983 "--log-target",
1984 };
1985 unsigned pos = 5;
1986 _cleanup_strv_free_ char **env_block = NULL;
1987
1988 assert(command_line[pos] == NULL);
1989 env_block = strv_copy(environ);
1990
1991 xsprintf(log_level, "%d", log_get_max_level());
1992
1993 switch (log_get_target()) {
1994 case LOG_TARGET_KMSG:
1995 case LOG_TARGET_JOURNAL_OR_KMSG:
1996 case LOG_TARGET_SYSLOG_OR_KMSG:
1997 command_line[pos++] = "kmsg";
1998 break;
1999
2000 case LOG_TARGET_NULL:
2001 command_line[pos++] = "null";
2002 break;
2003
2004 case LOG_TARGET_CONSOLE:
2005 default:
2006 command_line[pos++] = "console";
2007 break;
2008 };
2009
2010 if (log_get_show_color())
2011 command_line[pos++] = "--log-color";
2012
2013 if (log_get_show_location())
2014 command_line[pos++] = "--log-location";
2015
2016 assert(pos < ELEMENTSOF(command_line));
2017
2018 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2019 char *e;
2020
2021 /* If we reboot let's set the shutdown
2022 * watchdog and tell the shutdown binary to
2023 * repeatedly ping it */
2024 r = watchdog_set_timeout(&arg_shutdown_watchdog);
2025 watchdog_close(r < 0);
2026
2027 /* Tell the binary how often to ping, ignore failure */
2028 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2029 strv_push(&env_block, e);
2030 } else
2031 watchdog_close(true);
2032
2033 /* Avoid the creation of new processes forked by the
2034 * kernel; at this point, we will not listen to the
2035 * signals anyway */
2036 if (detect_container() <= 0)
2037 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2038
2039 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2040 log_error_errno(errno, "Failed to execute shutdown binary, %s: %m",
2041 getpid() == 1 ? "freezing" : "quitting");
2042 }
2043
2044 if (getpid() == 1) {
2045 if (error_message)
2046 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
2047 ANSI_HIGHLIGHT_RED_ON "!!!!!!" ANSI_HIGHLIGHT_OFF,
2048 "%s, freezing.", error_message);
2049 freeze();
2050 }
2051
2052 return retval;
2053 }
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