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[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 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 if (r < 0 && r != -ENOENT)
1214 log_warning_errno(r, "Failed to read os-release file: %m");
1215
1216 return status_printf(NULL, false, false,
1217 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1218 isempty(ansi_color) ? "1" : ansi_color,
1219 isempty(pretty_name) ? "Linux" : pretty_name);
1220 }
1221
1222 static int write_container_id(void) {
1223 const char *c;
1224
1225 c = getenv("container");
1226 if (isempty(c))
1227 return 0;
1228
1229 return write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE);
1230 }
1231
1232 int main(int argc, char *argv[]) {
1233 Manager *m = NULL;
1234 int r, retval = EXIT_FAILURE;
1235 usec_t before_startup, after_startup;
1236 char timespan[FORMAT_TIMESPAN_MAX];
1237 FDSet *fds = NULL;
1238 bool reexecute = false;
1239 const char *shutdown_verb = NULL;
1240 dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL;
1241 dual_timestamp userspace_timestamp = DUAL_TIMESTAMP_NULL;
1242 dual_timestamp kernel_timestamp = DUAL_TIMESTAMP_NULL;
1243 dual_timestamp security_start_timestamp = DUAL_TIMESTAMP_NULL;
1244 dual_timestamp security_finish_timestamp = DUAL_TIMESTAMP_NULL;
1245 static char systemd[] = "systemd";
1246 bool skip_setup = false;
1247 unsigned j;
1248 bool loaded_policy = false;
1249 bool arm_reboot_watchdog = false;
1250 bool queue_default_job = false;
1251 bool empty_etc = false;
1252 char *switch_root_dir = NULL, *switch_root_init = NULL;
1253 struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0);
1254 const char *error_message = NULL;
1255
1256 #ifdef HAVE_SYSV_COMPAT
1257 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1258 /* This is compatibility support for SysV, where
1259 * calling init as a user is identical to telinit. */
1260
1261 errno = -ENOENT;
1262 execv(SYSTEMCTL_BINARY_PATH, argv);
1263 log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1264 return 1;
1265 }
1266 #endif
1267
1268 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1269 dual_timestamp_get(&userspace_timestamp);
1270
1271 /* Determine if this is a reexecution or normal bootup. We do
1272 * the full command line parsing much later, so let's just
1273 * have a quick peek here. */
1274 if (strv_find(argv+1, "--deserialize"))
1275 skip_setup = true;
1276
1277 /* If we have switched root, do all the special setup
1278 * things */
1279 if (strv_find(argv+1, "--switched-root"))
1280 skip_setup = false;
1281
1282 /* If we get started via the /sbin/init symlink then we are
1283 called 'init'. After a subsequent reexecution we are then
1284 called 'systemd'. That is confusing, hence let's call us
1285 systemd right-away. */
1286 program_invocation_short_name = systemd;
1287 prctl(PR_SET_NAME, systemd);
1288
1289 saved_argv = argv;
1290 saved_argc = argc;
1291
1292 log_show_color(isatty(STDERR_FILENO) > 0);
1293 log_set_upgrade_syslog_to_journal(true);
1294
1295 /* Disable the umask logic */
1296 if (getpid() == 1)
1297 umask(0);
1298
1299 if (getpid() == 1 && detect_container() <= 0) {
1300
1301 /* Running outside of a container as PID 1 */
1302 arg_running_as = MANAGER_SYSTEM;
1303 make_null_stdio();
1304 log_set_target(LOG_TARGET_KMSG);
1305 log_open();
1306
1307 if (in_initrd())
1308 initrd_timestamp = userspace_timestamp;
1309
1310 if (!skip_setup) {
1311 mount_setup_early();
1312 dual_timestamp_get(&security_start_timestamp);
1313 if (mac_selinux_setup(&loaded_policy) < 0) {
1314 error_message = "Failed to load SELinux policy";
1315 goto finish;
1316 } else if (ima_setup() < 0) {
1317 error_message = "Failed to load IMA policy";
1318 goto finish;
1319 } else if (mac_smack_setup(&loaded_policy) < 0) {
1320 error_message = "Failed to load SMACK policy";
1321 goto finish;
1322 }
1323 dual_timestamp_get(&security_finish_timestamp);
1324 }
1325
1326 if (mac_selinux_init(NULL) < 0) {
1327 error_message = "Failed to initialize SELinux policy";
1328 goto finish;
1329 }
1330
1331 if (!skip_setup) {
1332 if (clock_is_localtime() > 0) {
1333 int min;
1334
1335 /*
1336 * The very first call of settimeofday() also does a time warp in the kernel.
1337 *
1338 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1339 * external tools to take care of maintaining the RTC and do all adjustments.
1340 * This matches the behavior of Windows, which leaves the RTC alone if the
1341 * registry tells that the RTC runs in UTC.
1342 */
1343 r = clock_set_timezone(&min);
1344 if (r < 0)
1345 log_error_errno(r, "Failed to apply local time delta, ignoring: %m");
1346 else
1347 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1348 } else if (!in_initrd()) {
1349 /*
1350 * Do a dummy very first call to seal the kernel's time warp magic.
1351 *
1352 * Do not call this this from inside the initrd. The initrd might not
1353 * carry /etc/adjtime with LOCAL, but the real system could be set up
1354 * that way. In such case, we need to delay the time-warp or the sealing
1355 * until we reach the real system.
1356 *
1357 * Do no set the kernel's timezone. The concept of local time cannot
1358 * be supported reliably, the time will jump or be incorrect at every daylight
1359 * saving time change. All kernel local time concepts will be treated
1360 * as UTC that way.
1361 */
1362 clock_reset_timewarp();
1363 }
1364 }
1365
1366 /* Set the default for later on, but don't actually
1367 * open the logs like this for now. Note that if we
1368 * are transitioning from the initrd there might still
1369 * be journal fd open, and we shouldn't attempt
1370 * opening that before we parsed /proc/cmdline which
1371 * might redirect output elsewhere. */
1372 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1373
1374 } else if (getpid() == 1) {
1375 /* Running inside a container, as PID 1 */
1376 arg_running_as = MANAGER_SYSTEM;
1377 log_set_target(LOG_TARGET_CONSOLE);
1378 log_close_console(); /* force reopen of /dev/console */
1379 log_open();
1380
1381 /* For the later on, see above... */
1382 log_set_target(LOG_TARGET_JOURNAL);
1383
1384 /* clear the kernel timestamp,
1385 * because we are in a container */
1386 kernel_timestamp.monotonic = 0ULL;
1387 kernel_timestamp.realtime = 0ULL;
1388
1389 } else {
1390 /* Running as user instance */
1391 arg_running_as = MANAGER_USER;
1392 log_set_target(LOG_TARGET_AUTO);
1393 log_open();
1394
1395 /* clear the kernel timestamp,
1396 * because we are not PID 1 */
1397 kernel_timestamp = DUAL_TIMESTAMP_NULL;
1398 }
1399
1400 /* Initialize default unit */
1401 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1402 if (r < 0) {
1403 log_emergency_errno(r, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET);
1404 error_message = "Failed to set default unit";
1405 goto finish;
1406 }
1407
1408 r = initialize_join_controllers();
1409 if (r < 0) {
1410 error_message = "Failed to initialize cgroup controllers";
1411 goto finish;
1412 }
1413
1414 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1415 * /proc/$PID/fd is available. */
1416 if (getpid() == 1) {
1417
1418 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1419 if (!skip_setup)
1420 kmod_setup();
1421
1422 r = mount_setup(loaded_policy);
1423 if (r < 0) {
1424 error_message = "Failed to mount API filesystems";
1425 goto finish;
1426 }
1427 }
1428
1429 /* Reset all signal handlers. */
1430 (void) reset_all_signal_handlers();
1431 (void) ignore_signals(SIGNALS_IGNORE, -1);
1432
1433 if (parse_config_file() < 0) {
1434 error_message = "Failed to parse config file";
1435 goto finish;
1436 }
1437
1438 if (arg_running_as == MANAGER_SYSTEM) {
1439 r = parse_proc_cmdline(parse_proc_cmdline_item);
1440 if (r < 0)
1441 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
1442 }
1443
1444 /* Note that this also parses bits from the kernel command
1445 * line, including "debug". */
1446 log_parse_environment();
1447
1448 if (parse_argv(argc, argv) < 0) {
1449 error_message = "Failed to parse commandline arguments";
1450 goto finish;
1451 }
1452
1453 if (arg_action == ACTION_TEST &&
1454 geteuid() == 0) {
1455 log_error("Don't run test mode as root.");
1456 goto finish;
1457 }
1458
1459 if (arg_running_as == MANAGER_USER &&
1460 arg_action == ACTION_RUN &&
1461 sd_booted() <= 0) {
1462 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1463 goto finish;
1464 }
1465
1466 if (arg_running_as == MANAGER_SYSTEM &&
1467 arg_action == ACTION_RUN &&
1468 running_in_chroot() > 0) {
1469 log_error("Cannot be run in a chroot() environment.");
1470 goto finish;
1471 }
1472
1473 if (arg_action == ACTION_TEST)
1474 skip_setup = true;
1475
1476 pager_open_if_enabled();
1477
1478 if (arg_action == ACTION_HELP) {
1479 retval = help();
1480 goto finish;
1481 } else if (arg_action == ACTION_VERSION) {
1482 retval = version();
1483 goto finish;
1484 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1485 unit_dump_config_items(stdout);
1486 retval = EXIT_SUCCESS;
1487 goto finish;
1488 } else if (arg_action == ACTION_DONE) {
1489 retval = EXIT_SUCCESS;
1490 goto finish;
1491 }
1492
1493 if (arg_running_as == MANAGER_USER &&
1494 !getenv("XDG_RUNTIME_DIR")) {
1495 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1496 goto finish;
1497 }
1498
1499 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1500
1501 /* Close logging fds, in order not to confuse fdset below */
1502 log_close();
1503
1504 /* Remember open file descriptors for later deserialization */
1505 r = fdset_new_fill(&fds);
1506 if (r < 0) {
1507 log_emergency_errno(r, "Failed to allocate fd set: %m");
1508 error_message = "Failed to allocate fd set";
1509 goto finish;
1510 } else
1511 fdset_cloexec(fds, true);
1512
1513 if (arg_serialization)
1514 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1515
1516 if (arg_running_as == MANAGER_SYSTEM)
1517 /* Become a session leader if we aren't one yet. */
1518 setsid();
1519
1520 /* Move out of the way, so that we won't block unmounts */
1521 assert_se(chdir("/") == 0);
1522
1523 /* Reset the console, but only if this is really init and we
1524 * are freshly booted */
1525 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1526
1527 /* If we are init, we connect stdin/stdout/stderr to
1528 * /dev/null and make sure we don't have a controlling
1529 * tty. */
1530 release_terminal();
1531
1532 if (getpid() == 1 && !skip_setup)
1533 console_setup();
1534 }
1535
1536 /* Open the logging devices, if possible and necessary */
1537 log_open();
1538
1539 if (arg_show_status == _SHOW_STATUS_UNSET)
1540 arg_show_status = SHOW_STATUS_YES;
1541
1542 /* Make sure we leave a core dump without panicing the
1543 * kernel. */
1544 if (getpid() == 1) {
1545 install_crash_handler();
1546
1547 r = mount_cgroup_controllers(arg_join_controllers);
1548 if (r < 0)
1549 goto finish;
1550 }
1551
1552 if (arg_running_as == MANAGER_SYSTEM) {
1553 int v;
1554
1555 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1556 arg_action == ACTION_TEST ? "test " : "" );
1557
1558 v = detect_virtualization();
1559 if (v > 0)
1560 log_info("Detected virtualization %s.", virtualization_to_string(v));
1561
1562 write_container_id();
1563
1564 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1565
1566 if (in_initrd())
1567 log_info("Running in initial RAM disk.");
1568
1569 /* Let's check whether /etc is already populated. We
1570 * don't actually really check for that, but use
1571 * /etc/machine-id as flag file. This allows container
1572 * managers and installers to provision a couple of
1573 * files already. If the container manager wants to
1574 * provision the machine ID itself it should pass
1575 * $container_uuid to PID 1. */
1576
1577 empty_etc = access("/etc/machine-id", F_OK) < 0;
1578 if (empty_etc)
1579 log_info("Running with unpopulated /etc.");
1580 } else {
1581 _cleanup_free_ char *t;
1582
1583 t = uid_to_name(getuid());
1584 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1585 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1586 }
1587
1588 if (arg_running_as == MANAGER_SYSTEM && !skip_setup) {
1589 if (arg_show_status > 0)
1590 status_welcome();
1591
1592 hostname_setup();
1593 machine_id_setup(NULL);
1594 loopback_setup();
1595
1596 test_mtab();
1597 test_usr();
1598 }
1599
1600 if (arg_running_as == MANAGER_SYSTEM && arg_runtime_watchdog > 0)
1601 watchdog_set_timeout(&arg_runtime_watchdog);
1602
1603 if (arg_timer_slack_nsec != NSEC_INFINITY)
1604 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1605 log_error_errno(errno, "Failed to adjust timer slack: %m");
1606
1607 if (arg_capability_bounding_set_drop) {
1608 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1609 if (r < 0) {
1610 log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m");
1611 error_message = "Failed to drop capability bounding set of usermode helpers";
1612 goto finish;
1613 }
1614 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1615 if (r < 0) {
1616 log_emergency_errno(r, "Failed to drop capability bounding set: %m");
1617 error_message = "Failed to drop capability bounding set";
1618 goto finish;
1619 }
1620 }
1621
1622 if (arg_syscall_archs) {
1623 r = enforce_syscall_archs(arg_syscall_archs);
1624 if (r < 0) {
1625 error_message = "Failed to set syscall architectures";
1626 goto finish;
1627 }
1628 }
1629
1630 if (arg_running_as == MANAGER_USER)
1631 /* Become reaper of our children */
1632 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0)
1633 log_warning_errno(errno, "Failed to make us a subreaper: %m");
1634
1635 if (arg_running_as == MANAGER_SYSTEM) {
1636 bump_rlimit_nofile(&saved_rlimit_nofile);
1637
1638 if (empty_etc) {
1639 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_ENABLE_ONLY, false, NULL, 0);
1640 if (r < 0)
1641 log_warning_errno(r, "Failed to populate /etc with preset unit settings, ignoring: %m");
1642 else
1643 log_info("Populated /etc with preset unit settings.");
1644 }
1645 }
1646
1647 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1648 if (r < 0) {
1649 log_emergency_errno(r, "Failed to allocate manager object: %m");
1650 error_message = "Failed to allocate manager object";
1651 goto finish;
1652 }
1653
1654 m->confirm_spawn = arg_confirm_spawn;
1655 m->runtime_watchdog = arg_runtime_watchdog;
1656 m->shutdown_watchdog = arg_shutdown_watchdog;
1657 m->userspace_timestamp = userspace_timestamp;
1658 m->kernel_timestamp = kernel_timestamp;
1659 m->initrd_timestamp = initrd_timestamp;
1660 m->security_start_timestamp = security_start_timestamp;
1661 m->security_finish_timestamp = security_finish_timestamp;
1662
1663 manager_set_defaults(m);
1664 manager_set_show_status(m, arg_show_status);
1665 manager_set_first_boot(m, empty_etc);
1666
1667 /* Remember whether we should queue the default job */
1668 queue_default_job = !arg_serialization || arg_switched_root;
1669
1670 before_startup = now(CLOCK_MONOTONIC);
1671
1672 r = manager_startup(m, arg_serialization, fds);
1673 if (r < 0)
1674 log_error_errno(r, "Failed to fully start up daemon: %m");
1675
1676 /* This will close all file descriptors that were opened, but
1677 * not claimed by any unit. */
1678 fdset_free(fds);
1679 fds = NULL;
1680
1681 if (arg_serialization) {
1682 fclose(arg_serialization);
1683 arg_serialization = NULL;
1684 }
1685
1686 if (queue_default_job) {
1687 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1688 Unit *target = NULL;
1689 Job *default_unit_job;
1690
1691 log_debug("Activating default unit: %s", arg_default_unit);
1692
1693 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1694 if (r < 0)
1695 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1696 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1697 log_error_errno(target->load_error, "Failed to load default target: %m");
1698 else if (target->load_state == UNIT_MASKED)
1699 log_error("Default target masked.");
1700
1701 if (!target || target->load_state != UNIT_LOADED) {
1702 log_info("Trying to load rescue target...");
1703
1704 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1705 if (r < 0) {
1706 log_emergency("Failed to load rescue target: %s", bus_error_message(&error, r));
1707 error_message = "Failed to load rescue target";
1708 goto finish;
1709 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1710 log_emergency_errno(target->load_error, "Failed to load rescue target: %m");
1711 error_message = "Failed to load rescue target";
1712 goto finish;
1713 } else if (target->load_state == UNIT_MASKED) {
1714 log_emergency("Rescue target masked.");
1715 error_message = "Rescue target masked";
1716 goto finish;
1717 }
1718 }
1719
1720 assert(target->load_state == UNIT_LOADED);
1721
1722 if (arg_action == ACTION_TEST) {
1723 printf("-> By units:\n");
1724 manager_dump_units(m, stdout, "\t");
1725 }
1726
1727 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1728 if (r == -EPERM) {
1729 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1730
1731 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1732 if (r < 0) {
1733 log_emergency("Failed to start default target: %s", bus_error_message(&error, r));
1734 error_message = "Failed to start default target";
1735 goto finish;
1736 }
1737 } else if (r < 0) {
1738 log_emergency("Failed to isolate default target: %s", bus_error_message(&error, r));
1739 error_message = "Failed to isolate default target";
1740 goto finish;
1741 }
1742
1743 m->default_unit_job_id = default_unit_job->id;
1744
1745 after_startup = now(CLOCK_MONOTONIC);
1746 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1747 "Loaded units and determined initial transaction in %s.",
1748 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
1749
1750 if (arg_action == ACTION_TEST) {
1751 printf("-> By jobs:\n");
1752 manager_dump_jobs(m, stdout, "\t");
1753 retval = EXIT_SUCCESS;
1754 goto finish;
1755 }
1756 }
1757
1758 for (;;) {
1759 r = manager_loop(m);
1760 if (r < 0) {
1761 log_emergency_errno(r, "Failed to run main loop: %m");
1762 error_message = "Failed to run main loop";
1763 goto finish;
1764 }
1765
1766 switch (m->exit_code) {
1767
1768 case MANAGER_EXIT:
1769 retval = EXIT_SUCCESS;
1770 log_debug("Exit.");
1771 goto finish;
1772
1773 case MANAGER_RELOAD:
1774 log_info("Reloading.");
1775
1776 r = parse_config_file();
1777 if (r < 0)
1778 log_error("Failed to parse config file.");
1779
1780 manager_set_defaults(m);
1781
1782 r = manager_reload(m);
1783 if (r < 0)
1784 log_error_errno(r, "Failed to reload: %m");
1785 break;
1786
1787 case MANAGER_REEXECUTE:
1788
1789 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0) {
1790 error_message = "Failed to prepare for reexecution";
1791 goto finish;
1792 }
1793
1794 reexecute = true;
1795 log_notice("Reexecuting.");
1796 goto finish;
1797
1798 case MANAGER_SWITCH_ROOT:
1799 /* Steal the switch root parameters */
1800 switch_root_dir = m->switch_root;
1801 switch_root_init = m->switch_root_init;
1802 m->switch_root = m->switch_root_init = NULL;
1803
1804 if (!switch_root_init)
1805 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0) {
1806 error_message = "Failed to prepare for reexecution";
1807 goto finish;
1808 }
1809
1810 reexecute = true;
1811 log_notice("Switching root.");
1812 goto finish;
1813
1814 case MANAGER_REBOOT:
1815 case MANAGER_POWEROFF:
1816 case MANAGER_HALT:
1817 case MANAGER_KEXEC: {
1818 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1819 [MANAGER_REBOOT] = "reboot",
1820 [MANAGER_POWEROFF] = "poweroff",
1821 [MANAGER_HALT] = "halt",
1822 [MANAGER_KEXEC] = "kexec"
1823 };
1824
1825 assert_se(shutdown_verb = table[m->exit_code]);
1826 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1827
1828 log_notice("Shutting down.");
1829 goto finish;
1830 }
1831
1832 default:
1833 assert_not_reached("Unknown exit code.");
1834 }
1835 }
1836
1837 finish:
1838 pager_close();
1839
1840 if (m)
1841 arg_shutdown_watchdog = m->shutdown_watchdog;
1842 m = manager_free(m);
1843
1844 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1845 arg_default_rlimit[j] = mfree(arg_default_rlimit[j]);
1846 }
1847
1848 arg_default_unit = mfree(arg_default_unit);
1849
1850 free_join_controllers();
1851
1852 arg_default_environment = strv_free(arg_default_environment);
1853
1854 set_free(arg_syscall_archs);
1855 arg_syscall_archs = NULL;
1856
1857 mac_selinux_finish();
1858
1859 if (reexecute) {
1860 const char **args;
1861 unsigned i, args_size;
1862
1863 /* Close and disarm the watchdog, so that the new
1864 * instance can reinitialize it, but doesn't get
1865 * rebooted while we do that */
1866 watchdog_close(true);
1867
1868 /* Reset the RLIMIT_NOFILE to the kernel default, so
1869 * that the new systemd can pass the kernel default to
1870 * its child processes */
1871 if (saved_rlimit_nofile.rlim_cur > 0)
1872 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1873
1874 if (switch_root_dir) {
1875 /* Kill all remaining processes from the
1876 * initrd, but don't wait for them, so that we
1877 * can handle the SIGCHLD for them after
1878 * deserializing. */
1879 broadcast_signal(SIGTERM, false, true);
1880
1881 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1882 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1883 if (r < 0)
1884 log_error_errno(r, "Failed to switch root, trying to continue: %m");
1885 }
1886
1887 args_size = MAX(6, argc+1);
1888 args = newa(const char*, args_size);
1889
1890 if (!switch_root_init) {
1891 char sfd[DECIMAL_STR_MAX(int) + 1];
1892
1893 /* First try to spawn ourselves with the right
1894 * path, and with full serialization. We do
1895 * this only if the user didn't specify an
1896 * explicit init to spawn. */
1897
1898 assert(arg_serialization);
1899 assert(fds);
1900
1901 xsprintf(sfd, "%i", fileno(arg_serialization));
1902
1903 i = 0;
1904 args[i++] = SYSTEMD_BINARY_PATH;
1905 if (switch_root_dir)
1906 args[i++] = "--switched-root";
1907 args[i++] = arg_running_as == MANAGER_SYSTEM ? "--system" : "--user";
1908 args[i++] = "--deserialize";
1909 args[i++] = sfd;
1910 args[i++] = NULL;
1911
1912 /* do not pass along the environment we inherit from the kernel or initrd */
1913 if (switch_root_dir)
1914 clearenv();
1915
1916 assert(i <= args_size);
1917 execv(args[0], (char* const*) args);
1918 }
1919
1920 /* Try the fallback, if there is any, without any
1921 * serialization. We pass the original argv[] and
1922 * envp[]. (Well, modulo the ordering changes due to
1923 * getopt() in argv[], and some cleanups in envp[],
1924 * but let's hope that doesn't matter.) */
1925
1926 if (arg_serialization) {
1927 fclose(arg_serialization);
1928 arg_serialization = NULL;
1929 }
1930
1931 if (fds) {
1932 fdset_free(fds);
1933 fds = NULL;
1934 }
1935
1936 /* Reopen the console */
1937 make_console_stdio();
1938
1939 for (j = 1, i = 1; j < (unsigned) argc; j++)
1940 args[i++] = argv[j];
1941 args[i++] = NULL;
1942 assert(i <= args_size);
1943
1944 /* Reenable any blocked signals, especially important
1945 * if we switch from initial ramdisk to init=... */
1946 (void) reset_all_signal_handlers();
1947 (void) reset_signal_mask();
1948
1949 if (switch_root_init) {
1950 args[0] = switch_root_init;
1951 execv(args[0], (char* const*) args);
1952 log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");
1953 }
1954
1955 args[0] = "/sbin/init";
1956 execv(args[0], (char* const*) args);
1957
1958 if (errno == ENOENT) {
1959 log_warning("No /sbin/init, trying fallback");
1960
1961 args[0] = "/bin/sh";
1962 args[1] = NULL;
1963 execv(args[0], (char* const*) args);
1964 log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m");
1965 } else
1966 log_warning_errno(errno, "Failed to execute /sbin/init, giving up: %m");
1967 }
1968
1969 if (arg_serialization) {
1970 fclose(arg_serialization);
1971 arg_serialization = NULL;
1972 }
1973
1974 if (fds) {
1975 fdset_free(fds);
1976 fds = NULL;
1977 }
1978
1979 #ifdef HAVE_VALGRIND_VALGRIND_H
1980 /* If we are PID 1 and running under valgrind, then let's exit
1981 * here explicitly. valgrind will only generate nice output on
1982 * exit(), not on exec(), hence let's do the former not the
1983 * latter here. */
1984 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1985 return 0;
1986 #endif
1987
1988 if (shutdown_verb) {
1989 char log_level[DECIMAL_STR_MAX(int) + 1];
1990 const char* command_line[9] = {
1991 SYSTEMD_SHUTDOWN_BINARY_PATH,
1992 shutdown_verb,
1993 "--log-level", log_level,
1994 "--log-target",
1995 };
1996 unsigned pos = 5;
1997 _cleanup_strv_free_ char **env_block = NULL;
1998
1999 assert(command_line[pos] == NULL);
2000 env_block = strv_copy(environ);
2001
2002 xsprintf(log_level, "%d", log_get_max_level());
2003
2004 switch (log_get_target()) {
2005 case LOG_TARGET_KMSG:
2006 case LOG_TARGET_JOURNAL_OR_KMSG:
2007 case LOG_TARGET_SYSLOG_OR_KMSG:
2008 command_line[pos++] = "kmsg";
2009 break;
2010
2011 case LOG_TARGET_NULL:
2012 command_line[pos++] = "null";
2013 break;
2014
2015 case LOG_TARGET_CONSOLE:
2016 default:
2017 command_line[pos++] = "console";
2018 break;
2019 };
2020
2021 if (log_get_show_color())
2022 command_line[pos++] = "--log-color";
2023
2024 if (log_get_show_location())
2025 command_line[pos++] = "--log-location";
2026
2027 assert(pos < ELEMENTSOF(command_line));
2028
2029 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2030 char *e;
2031
2032 /* If we reboot let's set the shutdown
2033 * watchdog and tell the shutdown binary to
2034 * repeatedly ping it */
2035 r = watchdog_set_timeout(&arg_shutdown_watchdog);
2036 watchdog_close(r < 0);
2037
2038 /* Tell the binary how often to ping, ignore failure */
2039 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2040 strv_push(&env_block, e);
2041 } else
2042 watchdog_close(true);
2043
2044 /* Avoid the creation of new processes forked by the
2045 * kernel; at this point, we will not listen to the
2046 * signals anyway */
2047 if (detect_container() <= 0)
2048 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2049
2050 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2051 log_error_errno(errno, "Failed to execute shutdown binary, %s: %m",
2052 getpid() == 1 ? "freezing" : "quitting");
2053 }
2054
2055 if (getpid() == 1) {
2056 if (error_message)
2057 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
2058 ANSI_HIGHLIGHT_RED_ON "!!!!!!" ANSI_HIGHLIGHT_OFF,
2059 "%s, freezing.", error_message);
2060 freeze();
2061 }
2062
2063 return retval;
2064 }
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