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Merge pull request #1653 from keszybz/lz4-compress-time
[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 <errno.h>
23 #include <fcntl.h>
24 #include <getopt.h>
25 #include <signal.h>
26 #include <stdio.h>
27 #include <string.h>
28 #include <sys/mount.h>
29 #include <sys/prctl.h>
30 #include <sys/reboot.h>
31 #include <sys/stat.h>
32 #include <unistd.h>
33 #ifdef HAVE_SECCOMP
34 #include <seccomp.h>
35 #endif
36 #ifdef HAVE_VALGRIND_VALGRIND_H
37 #include <valgrind/valgrind.h>
38 #endif
39
40 #include "sd-daemon.h"
41 #include "sd-bus.h"
42
43 #include "architecture.h"
44 #include "build.h"
45 #include "bus-error.h"
46 #include "bus-util.h"
47 #include "capability.h"
48 #include "clock-util.h"
49 #include "conf-parser.h"
50 #include "cpu-set-util.h"
51 #include "dbus-manager.h"
52 #include "def.h"
53 #include "env-util.h"
54 #include "fdset.h"
55 #include "fileio.h"
56 #include "formats-util.h"
57 #include "hostname-setup.h"
58 #include "ima-setup.h"
59 #include "killall.h"
60 #include "kmod-setup.h"
61 #include "load-fragment.h"
62 #include "log.h"
63 #include "loopback-setup.h"
64 #include "machine-id-setup.h"
65 #include "manager.h"
66 #include "missing.h"
67 #include "mount-setup.h"
68 #include "pager.h"
69 #include "process-util.h"
70 #include "selinux-setup.h"
71 #include "selinux-util.h"
72 #include "signal-util.h"
73 #include "smack-setup.h"
74 #include "special.h"
75 #include "strv.h"
76 #include "switch-root.h"
77 #include "terminal-util.h"
78 #include "virt.h"
79 #include "watchdog.h"
80
81 static enum {
82 ACTION_RUN,
83 ACTION_HELP,
84 ACTION_VERSION,
85 ACTION_TEST,
86 ACTION_DUMP_CONFIGURATION_ITEMS,
87 ACTION_DONE
88 } arg_action = ACTION_RUN;
89 static char *arg_default_unit = NULL;
90 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
91 static bool arg_dump_core = true;
92 static int arg_crash_chvt = -1;
93 static bool arg_crash_shell = false;
94 static bool arg_crash_reboot = false;
95 static bool arg_confirm_spawn = false;
96 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
97 static bool arg_switched_root = false;
98 static int arg_no_pager = -1;
99 static char ***arg_join_controllers = NULL;
100 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
101 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
102 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
103 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
104 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
105 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
106 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
107 static usec_t arg_runtime_watchdog = 0;
108 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
109 static char **arg_default_environment = NULL;
110 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
111 static uint64_t arg_capability_bounding_set_drop = 0;
112 static nsec_t arg_timer_slack_nsec = NSEC_INFINITY;
113 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
114 static Set* arg_syscall_archs = NULL;
115 static FILE* arg_serialization = NULL;
116 static bool arg_default_cpu_accounting = false;
117 static bool arg_default_blockio_accounting = false;
118 static bool arg_default_memory_accounting = false;
119 static bool arg_default_tasks_accounting = false;
120
121 static void pager_open_if_enabled(void) {
122
123 if (arg_no_pager <= 0)
124 return;
125
126 pager_open(false);
127 }
128
129 noreturn static void freeze_or_reboot(void) {
130
131 if (arg_crash_reboot) {
132 log_notice("Rebooting in 10s...");
133 (void) sleep(10);
134
135 log_notice("Rebooting now...");
136 (void) reboot(RB_AUTOBOOT);
137 log_emergency_errno(errno, "Failed to reboot: %m");
138 }
139
140 log_emergency("Freezing execution.");
141 freeze();
142 }
143
144 noreturn static void crash(int sig) {
145 struct sigaction sa;
146 pid_t pid;
147
148 if (getpid() != 1)
149 /* Pass this on immediately, if this is not PID 1 */
150 (void) raise(sig);
151 else if (!arg_dump_core)
152 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig));
153 else {
154 sa = (struct sigaction) {
155 .sa_handler = nop_signal_handler,
156 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
157 };
158
159 /* We want to wait for the core process, hence let's enable SIGCHLD */
160 (void) sigaction(SIGCHLD, &sa, NULL);
161
162 pid = raw_clone(SIGCHLD, NULL);
163 if (pid < 0)
164 log_emergency_errno(errno, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
165 else if (pid == 0) {
166 struct rlimit rl = {
167 .rlim_cur = RLIM_INFINITY,
168 .rlim_max = RLIM_INFINITY,
169 };
170
171 /* Enable default signal handler for core dump */
172 sa = (struct sigaction) {
173 .sa_handler = SIG_DFL,
174 };
175 (void) sigaction(sig, &sa, NULL);
176
177 /* Don't limit the core dump size */
178 (void) setrlimit(RLIMIT_CORE, &rl);
179
180 /* Just to be sure... */
181 (void) chdir("/");
182
183 /* Raise the signal again */
184 pid = raw_getpid();
185 (void) kill(pid, sig); /* raise() would kill the parent */
186
187 assert_not_reached("We shouldn't be here...");
188 _exit(EXIT_FAILURE);
189 } else {
190 siginfo_t status;
191 int r;
192
193 /* Order things nicely. */
194 r = wait_for_terminate(pid, &status);
195 if (r < 0)
196 log_emergency_errno(r, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig));
197 else if (status.si_code != CLD_DUMPED)
198 log_emergency("Caught <%s>, core dump failed (child "PID_FMT", code=%s, status=%i/%s).",
199 signal_to_string(sig),
200 pid, sigchld_code_to_string(status.si_code),
201 status.si_status,
202 strna(status.si_code == CLD_EXITED
203 ? exit_status_to_string(status.si_status, EXIT_STATUS_FULL)
204 : signal_to_string(status.si_status)));
205 else
206 log_emergency("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
207 }
208 }
209
210 if (arg_crash_chvt >= 0)
211 (void) chvt(arg_crash_chvt);
212
213 sa = (struct sigaction) {
214 .sa_handler = SIG_IGN,
215 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
216 };
217
218 /* Let the kernel reap children for us */
219 (void) sigaction(SIGCHLD, &sa, NULL);
220
221 if (arg_crash_shell) {
222 log_notice("Executing crash shell in 10s...");
223 (void) sleep(10);
224
225 pid = raw_clone(SIGCHLD, NULL);
226 if (pid < 0)
227 log_emergency_errno(errno, "Failed to fork off crash shell: %m");
228 else if (pid == 0) {
229 (void) setsid();
230 (void) make_console_stdio();
231 (void) execle("/bin/sh", "/bin/sh", NULL, environ);
232
233 log_emergency_errno(errno, "execle() failed: %m");
234 _exit(EXIT_FAILURE);
235 } else {
236 log_info("Spawned crash shell as PID "PID_FMT".", pid);
237 (void) wait_for_terminate(pid, NULL);
238 }
239 }
240
241 freeze_or_reboot();
242 }
243
244 static void install_crash_handler(void) {
245 static const struct sigaction sa = {
246 .sa_handler = crash,
247 .sa_flags = SA_NODEFER, /* So that we can raise the signal again from the signal handler */
248 };
249 int r;
250
251 /* We ignore the return value here, since, we don't mind if we
252 * cannot set up a crash handler */
253 r = sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
254 if (r < 0)
255 log_debug_errno(r, "I had trouble setting up the crash handler, ignoring: %m");
256 }
257
258 static int console_setup(void) {
259 _cleanup_close_ int tty_fd = -1;
260 int r;
261
262 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
263 if (tty_fd < 0)
264 return log_error_errno(tty_fd, "Failed to open /dev/console: %m");
265
266 /* We don't want to force text mode. plymouth may be showing
267 * pictures already from initrd. */
268 r = reset_terminal_fd(tty_fd, false);
269 if (r < 0)
270 return log_error_errno(r, "Failed to reset /dev/console: %m");
271
272 return 0;
273 }
274
275 static int parse_crash_chvt(const char *value) {
276 int b;
277
278 if (safe_atoi(value, &arg_crash_chvt) >= 0)
279 return 0;
280
281 b = parse_boolean(value);
282 if (b < 0)
283 return b;
284
285 if (b > 0)
286 arg_crash_chvt = 0; /* switch to where kmsg goes */
287 else
288 arg_crash_chvt = -1; /* turn off switching */
289
290 return 0;
291 }
292
293 static int parse_proc_cmdline_item(const char *key, const char *value) {
294
295 static const char * const rlmap[] = {
296 "emergency", SPECIAL_EMERGENCY_TARGET,
297 "-b", SPECIAL_EMERGENCY_TARGET,
298 "rescue", SPECIAL_RESCUE_TARGET,
299 "single", SPECIAL_RESCUE_TARGET,
300 "-s", SPECIAL_RESCUE_TARGET,
301 "s", SPECIAL_RESCUE_TARGET,
302 "S", SPECIAL_RESCUE_TARGET,
303 "1", SPECIAL_RESCUE_TARGET,
304 "2", SPECIAL_MULTI_USER_TARGET,
305 "3", SPECIAL_MULTI_USER_TARGET,
306 "4", SPECIAL_MULTI_USER_TARGET,
307 "5", SPECIAL_GRAPHICAL_TARGET,
308 };
309 int r;
310
311 assert(key);
312
313 if (streq(key, "systemd.unit") && value) {
314
315 if (!in_initrd())
316 return free_and_strdup(&arg_default_unit, value);
317
318 } else if (streq(key, "rd.systemd.unit") && value) {
319
320 if (in_initrd())
321 return free_and_strdup(&arg_default_unit, value);
322
323 } else if (streq(key, "systemd.dump_core") && value) {
324
325 r = parse_boolean(value);
326 if (r < 0)
327 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
328 else
329 arg_dump_core = r;
330
331 } else if (streq(key, "systemd.crash_chvt") && value) {
332
333 if (parse_crash_chvt(value) < 0)
334 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
335
336 } else if (streq(key, "systemd.crash_shell") && value) {
337
338 r = parse_boolean(value);
339 if (r < 0)
340 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
341 else
342 arg_crash_shell = r;
343
344 } else if (streq(key, "systemd.crash_reboot") && value) {
345
346 r = parse_boolean(value);
347 if (r < 0)
348 log_warning("Failed to parse crash reboot switch %s. Ignoring.", value);
349 else
350 arg_crash_reboot = r;
351
352 } else if (streq(key, "systemd.confirm_spawn") && value) {
353
354 r = parse_boolean(value);
355 if (r < 0)
356 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
357 else
358 arg_confirm_spawn = r;
359
360 } else if (streq(key, "systemd.show_status") && value) {
361
362 r = parse_show_status(value, &arg_show_status);
363 if (r < 0)
364 log_warning("Failed to parse show status switch %s. Ignoring.", value);
365
366 } else if (streq(key, "systemd.default_standard_output") && value) {
367
368 r = exec_output_from_string(value);
369 if (r < 0)
370 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
371 else
372 arg_default_std_output = r;
373
374 } else if (streq(key, "systemd.default_standard_error") && value) {
375
376 r = exec_output_from_string(value);
377 if (r < 0)
378 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
379 else
380 arg_default_std_error = r;
381
382 } else if (streq(key, "systemd.setenv") && value) {
383
384 if (env_assignment_is_valid(value)) {
385 char **env;
386
387 env = strv_env_set(arg_default_environment, value);
388 if (env)
389 arg_default_environment = env;
390 else
391 log_warning_errno(ENOMEM, "Setting environment variable '%s' failed, ignoring: %m", value);
392 } else
393 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
394
395 } else if (streq(key, "quiet") && !value) {
396
397 if (arg_show_status == _SHOW_STATUS_UNSET)
398 arg_show_status = SHOW_STATUS_AUTO;
399
400 } else if (streq(key, "debug") && !value) {
401
402 /* Note that log_parse_environment() handles 'debug'
403 * too, and sets the log level to LOG_DEBUG. */
404
405 if (detect_container() > 0)
406 log_set_target(LOG_TARGET_CONSOLE);
407
408 } else if (!in_initrd() && !value) {
409 unsigned i;
410
411 /* SysV compatibility */
412 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
413 if (streq(key, rlmap[i]))
414 return free_and_strdup(&arg_default_unit, rlmap[i+1]);
415 }
416
417 return 0;
418 }
419
420 #define DEFINE_SETTER(name, func, descr) \
421 static int name(const char *unit, \
422 const char *filename, \
423 unsigned line, \
424 const char *section, \
425 unsigned section_line, \
426 const char *lvalue, \
427 int ltype, \
428 const char *rvalue, \
429 void *data, \
430 void *userdata) { \
431 \
432 int r; \
433 \
434 assert(filename); \
435 assert(lvalue); \
436 assert(rvalue); \
437 \
438 r = func(rvalue); \
439 if (r < 0) \
440 log_syntax(unit, LOG_ERR, filename, line, r, \
441 "Invalid " descr "'%s': %m", \
442 rvalue); \
443 \
444 return 0; \
445 }
446
447 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
448 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
449 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
450 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
451
452 static int config_parse_cpu_affinity2(
453 const char *unit,
454 const char *filename,
455 unsigned line,
456 const char *section,
457 unsigned section_line,
458 const char *lvalue,
459 int ltype,
460 const char *rvalue,
461 void *data,
462 void *userdata) {
463
464 _cleanup_cpu_free_ cpu_set_t *c = NULL;
465 int ncpus;
466
467 ncpus = parse_cpu_set_and_warn(rvalue, &c, unit, filename, line, lvalue);
468 if (ncpus < 0)
469 return ncpus;
470
471 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
472 log_warning("Failed to set CPU affinity: %m");
473
474 return 0;
475 }
476
477 static int config_parse_show_status(
478 const char* unit,
479 const char *filename,
480 unsigned line,
481 const char *section,
482 unsigned section_line,
483 const char *lvalue,
484 int ltype,
485 const char *rvalue,
486 void *data,
487 void *userdata) {
488
489 int k;
490 ShowStatus *b = data;
491
492 assert(filename);
493 assert(lvalue);
494 assert(rvalue);
495 assert(data);
496
497 k = parse_show_status(rvalue, b);
498 if (k < 0) {
499 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse show status setting, ignoring: %s", rvalue);
500 return 0;
501 }
502
503 return 0;
504 }
505
506 static int config_parse_crash_chvt(
507 const char* unit,
508 const char *filename,
509 unsigned line,
510 const char *section,
511 unsigned section_line,
512 const char *lvalue,
513 int ltype,
514 const char *rvalue,
515 void *data,
516 void *userdata) {
517
518 int r;
519
520 assert(filename);
521 assert(lvalue);
522 assert(rvalue);
523
524 r = parse_crash_chvt(rvalue);
525 if (r < 0) {
526 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse CrashChangeVT= setting, ignoring: %s", rvalue);
527 return 0;
528 }
529
530 return 0;
531 }
532
533 static int config_parse_join_controllers(const char *unit,
534 const char *filename,
535 unsigned line,
536 const char *section,
537 unsigned section_line,
538 const char *lvalue,
539 int ltype,
540 const char *rvalue,
541 void *data,
542 void *userdata) {
543
544 const char *whole_rvalue = rvalue;
545 unsigned n = 0;
546
547 assert(filename);
548 assert(lvalue);
549 assert(rvalue);
550
551 arg_join_controllers = strv_free_free(arg_join_controllers);
552
553 for (;;) {
554 _cleanup_free_ char *word = NULL;
555 char **l;
556 int r;
557
558 r = extract_first_word(&rvalue, &word, WHITESPACE, EXTRACT_QUOTES);
559 if (r < 0) {
560 log_syntax(unit, LOG_ERR, filename, line, r, "Invalid value for %s: %s", lvalue, whole_rvalue);
561 return r;
562 }
563 if (r == 0)
564 break;
565
566 l = strv_split(word, ",");
567 if (!l)
568 return log_oom();
569 strv_uniq(l);
570
571 if (strv_length(l) <= 1) {
572 strv_free(l);
573 continue;
574 }
575
576 if (!arg_join_controllers) {
577 arg_join_controllers = new(char**, 2);
578 if (!arg_join_controllers) {
579 strv_free(l);
580 return log_oom();
581 }
582
583 arg_join_controllers[0] = l;
584 arg_join_controllers[1] = NULL;
585
586 n = 1;
587 } else {
588 char ***a;
589 char ***t;
590
591 t = new0(char**, n+2);
592 if (!t) {
593 strv_free(l);
594 return log_oom();
595 }
596
597 n = 0;
598
599 for (a = arg_join_controllers; *a; a++) {
600
601 if (strv_overlap(*a, l)) {
602 if (strv_extend_strv(&l, *a, false) < 0) {
603 strv_free(l);
604 strv_free_free(t);
605 return log_oom();
606 }
607
608 } else {
609 char **c;
610
611 c = strv_copy(*a);
612 if (!c) {
613 strv_free(l);
614 strv_free_free(t);
615 return log_oom();
616 }
617
618 t[n++] = c;
619 }
620 }
621
622 t[n++] = strv_uniq(l);
623
624 strv_free_free(arg_join_controllers);
625 arg_join_controllers = t;
626 }
627 }
628 if (!isempty(rvalue))
629 log_syntax(unit, LOG_ERR, filename, line, 0, "Trailing garbage, ignoring.");
630
631 return 0;
632 }
633
634 static int parse_config_file(void) {
635
636 const ConfigTableItem items[] = {
637 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
638 { "Manager", "LogTarget", config_parse_target, 0, NULL },
639 { "Manager", "LogColor", config_parse_color, 0, NULL },
640 { "Manager", "LogLocation", config_parse_location, 0, NULL },
641 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
642 { "Manager", "CrashChVT", /* legacy */ config_parse_crash_chvt, 0, NULL },
643 { "Manager", "CrashChangeVT", config_parse_crash_chvt, 0, NULL },
644 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
645 { "Manager", "CrashReboot", config_parse_bool, 0, &arg_crash_reboot },
646 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
647 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
648 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
649 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
650 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
651 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
652 #ifdef HAVE_SECCOMP
653 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
654 #endif
655 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
656 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
657 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
658 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
659 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
660 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
661 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
662 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
663 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
664 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
665 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
666 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
667 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
668 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
669 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
670 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
671 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
672 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
673 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
674 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
675 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
676 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
677 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
678 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
679 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
680 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
681 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
682 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
683 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
684 { "Manager", "DefaultTasksAccounting", config_parse_bool, 0, &arg_default_tasks_accounting },
685 {}
686 };
687
688 const char *fn, *conf_dirs_nulstr;
689
690 fn = arg_running_as == MANAGER_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
691 conf_dirs_nulstr = arg_running_as == MANAGER_SYSTEM ? CONF_DIRS_NULSTR("systemd/system.conf") : CONF_DIRS_NULSTR("systemd/user.conf");
692 config_parse_many(fn, conf_dirs_nulstr, "Manager\0",
693 config_item_table_lookup, items, false, NULL);
694
695 return 0;
696 }
697
698 static void manager_set_defaults(Manager *m) {
699
700 assert(m);
701
702 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
703 m->default_std_output = arg_default_std_output;
704 m->default_std_error = arg_default_std_error;
705 m->default_timeout_start_usec = arg_default_timeout_start_usec;
706 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
707 m->default_restart_usec = arg_default_restart_usec;
708 m->default_start_limit_interval = arg_default_start_limit_interval;
709 m->default_start_limit_burst = arg_default_start_limit_burst;
710 m->default_cpu_accounting = arg_default_cpu_accounting;
711 m->default_blockio_accounting = arg_default_blockio_accounting;
712 m->default_memory_accounting = arg_default_memory_accounting;
713 m->default_tasks_accounting = arg_default_tasks_accounting;
714
715 manager_set_default_rlimits(m, arg_default_rlimit);
716 manager_environment_add(m, NULL, arg_default_environment);
717 }
718
719 static int parse_argv(int argc, char *argv[]) {
720
721 enum {
722 ARG_LOG_LEVEL = 0x100,
723 ARG_LOG_TARGET,
724 ARG_LOG_COLOR,
725 ARG_LOG_LOCATION,
726 ARG_UNIT,
727 ARG_SYSTEM,
728 ARG_USER,
729 ARG_TEST,
730 ARG_NO_PAGER,
731 ARG_VERSION,
732 ARG_DUMP_CONFIGURATION_ITEMS,
733 ARG_DUMP_CORE,
734 ARG_CRASH_CHVT,
735 ARG_CRASH_SHELL,
736 ARG_CRASH_REBOOT,
737 ARG_CONFIRM_SPAWN,
738 ARG_SHOW_STATUS,
739 ARG_DESERIALIZE,
740 ARG_SWITCHED_ROOT,
741 ARG_DEFAULT_STD_OUTPUT,
742 ARG_DEFAULT_STD_ERROR
743 };
744
745 static const struct option options[] = {
746 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
747 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
748 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
749 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
750 { "unit", required_argument, NULL, ARG_UNIT },
751 { "system", no_argument, NULL, ARG_SYSTEM },
752 { "user", no_argument, NULL, ARG_USER },
753 { "test", no_argument, NULL, ARG_TEST },
754 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
755 { "help", no_argument, NULL, 'h' },
756 { "version", no_argument, NULL, ARG_VERSION },
757 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
758 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
759 { "crash-chvt", required_argument, NULL, ARG_CRASH_CHVT },
760 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
761 { "crash-reboot", optional_argument, NULL, ARG_CRASH_REBOOT },
762 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
763 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
764 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
765 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
766 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
767 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
768 {}
769 };
770
771 int c, r;
772
773 assert(argc >= 1);
774 assert(argv);
775
776 if (getpid() == 1)
777 opterr = 0;
778
779 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
780
781 switch (c) {
782
783 case ARG_LOG_LEVEL:
784 r = log_set_max_level_from_string(optarg);
785 if (r < 0) {
786 log_error("Failed to parse log level %s.", optarg);
787 return r;
788 }
789
790 break;
791
792 case ARG_LOG_TARGET:
793 r = log_set_target_from_string(optarg);
794 if (r < 0) {
795 log_error("Failed to parse log target %s.", optarg);
796 return r;
797 }
798
799 break;
800
801 case ARG_LOG_COLOR:
802
803 if (optarg) {
804 r = log_show_color_from_string(optarg);
805 if (r < 0) {
806 log_error("Failed to parse log color setting %s.", optarg);
807 return r;
808 }
809 } else
810 log_show_color(true);
811
812 break;
813
814 case ARG_LOG_LOCATION:
815 if (optarg) {
816 r = log_show_location_from_string(optarg);
817 if (r < 0) {
818 log_error("Failed to parse log location setting %s.", optarg);
819 return r;
820 }
821 } else
822 log_show_location(true);
823
824 break;
825
826 case ARG_DEFAULT_STD_OUTPUT:
827 r = exec_output_from_string(optarg);
828 if (r < 0) {
829 log_error("Failed to parse default standard output setting %s.", optarg);
830 return r;
831 } else
832 arg_default_std_output = r;
833 break;
834
835 case ARG_DEFAULT_STD_ERROR:
836 r = exec_output_from_string(optarg);
837 if (r < 0) {
838 log_error("Failed to parse default standard error output setting %s.", optarg);
839 return r;
840 } else
841 arg_default_std_error = r;
842 break;
843
844 case ARG_UNIT:
845
846 r = free_and_strdup(&arg_default_unit, optarg);
847 if (r < 0)
848 return log_error_errno(r, "Failed to set default unit %s: %m", optarg);
849
850 break;
851
852 case ARG_SYSTEM:
853 arg_running_as = MANAGER_SYSTEM;
854 break;
855
856 case ARG_USER:
857 arg_running_as = MANAGER_USER;
858 break;
859
860 case ARG_TEST:
861 arg_action = ACTION_TEST;
862 if (arg_no_pager < 0)
863 arg_no_pager = true;
864 break;
865
866 case ARG_NO_PAGER:
867 arg_no_pager = true;
868 break;
869
870 case ARG_VERSION:
871 arg_action = ACTION_VERSION;
872 break;
873
874 case ARG_DUMP_CONFIGURATION_ITEMS:
875 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
876 break;
877
878 case ARG_DUMP_CORE:
879 if (!optarg)
880 arg_dump_core = true;
881 else {
882 r = parse_boolean(optarg);
883 if (r < 0)
884 return log_error_errno(r, "Failed to parse dump core boolean: %s", optarg);
885 arg_dump_core = r;
886 }
887 break;
888
889 case ARG_CRASH_CHVT:
890 r = parse_crash_chvt(optarg);
891 if (r < 0)
892 return log_error_errno(r, "Failed to parse crash virtual terminal index: %s", optarg);
893 break;
894
895 case ARG_CRASH_SHELL:
896 if (!optarg)
897 arg_crash_shell = true;
898 else {
899 r = parse_boolean(optarg);
900 if (r < 0)
901 return log_error_errno(r, "Failed to parse crash shell boolean: %s", optarg);
902 arg_crash_shell = r;
903 }
904 break;
905
906 case ARG_CRASH_REBOOT:
907 if (!optarg)
908 arg_crash_reboot = true;
909 else {
910 r = parse_boolean(optarg);
911 if (r < 0)
912 return log_error_errno(r, "Failed to parse crash shell boolean: %s", optarg);
913 arg_crash_reboot = r;
914 }
915 break;
916
917 case ARG_CONFIRM_SPAWN:
918 r = optarg ? parse_boolean(optarg) : 1;
919 if (r < 0) {
920 log_error("Failed to parse confirm spawn boolean %s.", optarg);
921 return r;
922 }
923 arg_confirm_spawn = r;
924 break;
925
926 case ARG_SHOW_STATUS:
927 if (optarg) {
928 r = parse_show_status(optarg, &arg_show_status);
929 if (r < 0) {
930 log_error("Failed to parse show status boolean %s.", optarg);
931 return r;
932 }
933 } else
934 arg_show_status = SHOW_STATUS_YES;
935 break;
936
937 case ARG_DESERIALIZE: {
938 int fd;
939 FILE *f;
940
941 r = safe_atoi(optarg, &fd);
942 if (r < 0 || fd < 0) {
943 log_error("Failed to parse deserialize option %s.", optarg);
944 return -EINVAL;
945 }
946
947 (void) fd_cloexec(fd, true);
948
949 f = fdopen(fd, "r");
950 if (!f)
951 return log_error_errno(errno, "Failed to open serialization fd: %m");
952
953 safe_fclose(arg_serialization);
954 arg_serialization = f;
955
956 break;
957 }
958
959 case ARG_SWITCHED_ROOT:
960 arg_switched_root = true;
961 break;
962
963 case 'h':
964 arg_action = ACTION_HELP;
965 if (arg_no_pager < 0)
966 arg_no_pager = true;
967 break;
968
969 case 'D':
970 log_set_max_level(LOG_DEBUG);
971 break;
972
973 case 'b':
974 case 's':
975 case 'z':
976 /* Just to eat away the sysvinit kernel
977 * cmdline args without getopt() error
978 * messages that we'll parse in
979 * parse_proc_cmdline_word() or ignore. */
980
981 case '?':
982 if (getpid() != 1)
983 return -EINVAL;
984 else
985 return 0;
986
987 default:
988 assert_not_reached("Unhandled option code.");
989 }
990
991 if (optind < argc && getpid() != 1) {
992 /* Hmm, when we aren't run as init system
993 * let's complain about excess arguments */
994
995 log_error("Excess arguments.");
996 return -EINVAL;
997 }
998
999 return 0;
1000 }
1001
1002 static int help(void) {
1003
1004 printf("%s [OPTIONS...]\n\n"
1005 "Starts up and maintains the system or user services.\n\n"
1006 " -h --help Show this help\n"
1007 " --test Determine startup sequence, dump it and exit\n"
1008 " --no-pager Do not pipe output into a pager\n"
1009 " --dump-configuration-items Dump understood unit configuration items\n"
1010 " --unit=UNIT Set default unit\n"
1011 " --system Run a system instance, even if PID != 1\n"
1012 " --user Run a user instance\n"
1013 " --dump-core[=BOOL] Dump core on crash\n"
1014 " --crash-vt=NR Change to specified VT on crash\n"
1015 " --crash-reboot[=BOOL] Reboot on crash\n"
1016 " --crash-shell[=BOOL] Run shell on crash\n"
1017 " --confirm-spawn[=BOOL] Ask for confirmation when spawning processes\n"
1018 " --show-status[=BOOL] Show status updates on the console during bootup\n"
1019 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
1020 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1021 " --log-color[=BOOL] Highlight important log messages\n"
1022 " --log-location[=BOOL] Include code location in log messages\n"
1023 " --default-standard-output= Set default standard output for services\n"
1024 " --default-standard-error= Set default standard error output for services\n",
1025 program_invocation_short_name);
1026
1027 return 0;
1028 }
1029
1030 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1031 _cleanup_fdset_free_ FDSet *fds = NULL;
1032 _cleanup_fclose_ FILE *f = NULL;
1033 int r;
1034
1035 assert(m);
1036 assert(_f);
1037 assert(_fds);
1038
1039 r = manager_open_serialization(m, &f);
1040 if (r < 0)
1041 return log_error_errno(r, "Failed to create serialization file: %m");
1042
1043 /* Make sure nothing is really destructed when we shut down */
1044 m->n_reloading ++;
1045 bus_manager_send_reloading(m, true);
1046
1047 fds = fdset_new();
1048 if (!fds)
1049 return log_oom();
1050
1051 r = manager_serialize(m, f, fds, switching_root);
1052 if (r < 0)
1053 return log_error_errno(r, "Failed to serialize state: %m");
1054
1055 if (fseeko(f, 0, SEEK_SET) == (off_t) -1)
1056 return log_error_errno(errno, "Failed to rewind serialization fd: %m");
1057
1058 r = fd_cloexec(fileno(f), false);
1059 if (r < 0)
1060 return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m");
1061
1062 r = fdset_cloexec(fds, false);
1063 if (r < 0)
1064 return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m");
1065
1066 *_f = f;
1067 *_fds = fds;
1068
1069 f = NULL;
1070 fds = NULL;
1071
1072 return 0;
1073 }
1074
1075 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1076 struct rlimit nl;
1077 int r;
1078
1079 assert(saved_rlimit);
1080
1081 /* Save the original RLIMIT_NOFILE so that we can reset it
1082 * later when transitioning from the initrd to the main
1083 * systemd or suchlike. */
1084 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0)
1085 return log_error_errno(errno, "Reading RLIMIT_NOFILE failed: %m");
1086
1087 /* Make sure forked processes get the default kernel setting */
1088 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1089 struct rlimit *rl;
1090
1091 rl = newdup(struct rlimit, saved_rlimit, 1);
1092 if (!rl)
1093 return log_oom();
1094
1095 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1096 }
1097
1098 /* Bump up the resource limit for ourselves substantially */
1099 nl.rlim_cur = nl.rlim_max = 64*1024;
1100 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1101 if (r < 0)
1102 return log_error_errno(r, "Setting RLIMIT_NOFILE failed: %m");
1103
1104 return 0;
1105 }
1106
1107 static void test_mtab(void) {
1108
1109 static const char ok[] =
1110 "/proc/self/mounts\0"
1111 "/proc/mounts\0"
1112 "../proc/self/mounts\0"
1113 "../proc/mounts\0";
1114
1115 _cleanup_free_ char *p = NULL;
1116 int r;
1117
1118 /* Check that /etc/mtab is a symlink to the right place or
1119 * non-existing. But certainly not a file, or a symlink to
1120 * some weird place... */
1121
1122 r = readlink_malloc("/etc/mtab", &p);
1123 if (r == -ENOENT)
1124 return;
1125 if (r >= 0 && nulstr_contains(ok, p))
1126 return;
1127
1128 log_error("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1129 "This is not supported anymore. "
1130 "Please replace /etc/mtab with a symlink to /proc/self/mounts.");
1131 freeze_or_reboot();
1132 }
1133
1134 static void test_usr(void) {
1135
1136 /* Check that /usr is not a separate fs */
1137
1138 if (dir_is_empty("/usr") <= 0)
1139 return;
1140
1141 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
1142 "Some things will probably break (sometimes even silently) in mysterious ways. "
1143 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1144 }
1145
1146 static int initialize_join_controllers(void) {
1147 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1148 * + "net_prio". We'd like to add "cpuset" to the mix, but
1149 * "cpuset" doesn't really work for groups with no initialized
1150 * attributes. */
1151
1152 arg_join_controllers = new(char**, 3);
1153 if (!arg_join_controllers)
1154 return -ENOMEM;
1155
1156 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1157 if (!arg_join_controllers[0])
1158 goto oom;
1159
1160 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1161 if (!arg_join_controllers[1])
1162 goto oom;
1163
1164 arg_join_controllers[2] = NULL;
1165 return 0;
1166
1167 oom:
1168 arg_join_controllers = strv_free_free(arg_join_controllers);
1169 return -ENOMEM;
1170 }
1171
1172 static int enforce_syscall_archs(Set *archs) {
1173 #ifdef HAVE_SECCOMP
1174 scmp_filter_ctx *seccomp;
1175 Iterator i;
1176 void *id;
1177 int r;
1178
1179 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1180 if (!seccomp)
1181 return log_oom();
1182
1183 SET_FOREACH(id, arg_syscall_archs, i) {
1184 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1185 if (r == -EEXIST)
1186 continue;
1187 if (r < 0) {
1188 log_error_errno(r, "Failed to add architecture to seccomp: %m");
1189 goto finish;
1190 }
1191 }
1192
1193 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1194 if (r < 0) {
1195 log_error_errno(r, "Failed to unset NO_NEW_PRIVS: %m");
1196 goto finish;
1197 }
1198
1199 r = seccomp_load(seccomp);
1200 if (r < 0)
1201 log_error_errno(r, "Failed to add install architecture seccomp: %m");
1202
1203 finish:
1204 seccomp_release(seccomp);
1205 return r;
1206 #else
1207 return 0;
1208 #endif
1209 }
1210
1211 static int status_welcome(void) {
1212 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1213 int r;
1214
1215 r = parse_env_file("/etc/os-release", NEWLINE,
1216 "PRETTY_NAME", &pretty_name,
1217 "ANSI_COLOR", &ansi_color,
1218 NULL);
1219 if (r == -ENOENT)
1220 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1221 "PRETTY_NAME", &pretty_name,
1222 "ANSI_COLOR", &ansi_color,
1223 NULL);
1224
1225 if (r < 0 && r != -ENOENT)
1226 log_warning_errno(r, "Failed to read os-release file: %m");
1227
1228 return status_printf(NULL, false, false,
1229 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1230 isempty(ansi_color) ? "1" : ansi_color,
1231 isempty(pretty_name) ? "Linux" : pretty_name);
1232 }
1233
1234 static int write_container_id(void) {
1235 const char *c;
1236
1237 c = getenv("container");
1238 if (isempty(c))
1239 return 0;
1240
1241 return write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE);
1242 }
1243
1244 int main(int argc, char *argv[]) {
1245 Manager *m = NULL;
1246 int r, retval = EXIT_FAILURE;
1247 usec_t before_startup, after_startup;
1248 char timespan[FORMAT_TIMESPAN_MAX];
1249 FDSet *fds = NULL;
1250 bool reexecute = false;
1251 const char *shutdown_verb = NULL;
1252 dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL;
1253 dual_timestamp userspace_timestamp = DUAL_TIMESTAMP_NULL;
1254 dual_timestamp kernel_timestamp = DUAL_TIMESTAMP_NULL;
1255 dual_timestamp security_start_timestamp = DUAL_TIMESTAMP_NULL;
1256 dual_timestamp security_finish_timestamp = DUAL_TIMESTAMP_NULL;
1257 static char systemd[] = "systemd";
1258 bool skip_setup = false;
1259 unsigned j;
1260 bool loaded_policy = false;
1261 bool arm_reboot_watchdog = false;
1262 bool queue_default_job = false;
1263 bool empty_etc = false;
1264 char *switch_root_dir = NULL, *switch_root_init = NULL;
1265 struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0);
1266 const char *error_message = NULL;
1267
1268 #ifdef HAVE_SYSV_COMPAT
1269 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1270 /* This is compatibility support for SysV, where
1271 * calling init as a user is identical to telinit. */
1272
1273 errno = -ENOENT;
1274 execv(SYSTEMCTL_BINARY_PATH, argv);
1275 log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1276 return 1;
1277 }
1278 #endif
1279
1280 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1281 dual_timestamp_get(&userspace_timestamp);
1282
1283 /* Determine if this is a reexecution or normal bootup. We do
1284 * the full command line parsing much later, so let's just
1285 * have a quick peek here. */
1286 if (strv_find(argv+1, "--deserialize"))
1287 skip_setup = true;
1288
1289 /* If we have switched root, do all the special setup
1290 * things */
1291 if (strv_find(argv+1, "--switched-root"))
1292 skip_setup = false;
1293
1294 /* If we get started via the /sbin/init symlink then we are
1295 called 'init'. After a subsequent reexecution we are then
1296 called 'systemd'. That is confusing, hence let's call us
1297 systemd right-away. */
1298 program_invocation_short_name = systemd;
1299 prctl(PR_SET_NAME, systemd);
1300
1301 saved_argv = argv;
1302 saved_argc = argc;
1303
1304 log_show_color(isatty(STDERR_FILENO) > 0);
1305 log_set_upgrade_syslog_to_journal(true);
1306
1307 /* Disable the umask logic */
1308 if (getpid() == 1)
1309 umask(0);
1310
1311 if (getpid() == 1 && detect_container() <= 0) {
1312
1313 /* Running outside of a container as PID 1 */
1314 arg_running_as = MANAGER_SYSTEM;
1315 make_null_stdio();
1316 log_set_target(LOG_TARGET_KMSG);
1317 log_open();
1318
1319 if (in_initrd())
1320 initrd_timestamp = userspace_timestamp;
1321
1322 if (!skip_setup) {
1323 mount_setup_early();
1324 dual_timestamp_get(&security_start_timestamp);
1325 if (mac_selinux_setup(&loaded_policy) < 0) {
1326 error_message = "Failed to load SELinux policy";
1327 goto finish;
1328 } else if (ima_setup() < 0) {
1329 error_message = "Failed to load IMA policy";
1330 goto finish;
1331 } else if (mac_smack_setup(&loaded_policy) < 0) {
1332 error_message = "Failed to load SMACK policy";
1333 goto finish;
1334 }
1335 dual_timestamp_get(&security_finish_timestamp);
1336 }
1337
1338 if (mac_selinux_init(NULL) < 0) {
1339 error_message = "Failed to initialize SELinux policy";
1340 goto finish;
1341 }
1342
1343 if (!skip_setup) {
1344 if (clock_is_localtime() > 0) {
1345 int min;
1346
1347 /*
1348 * The very first call of settimeofday() also does a time warp in the kernel.
1349 *
1350 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1351 * external tools to take care of maintaining the RTC and do all adjustments.
1352 * This matches the behavior of Windows, which leaves the RTC alone if the
1353 * registry tells that the RTC runs in UTC.
1354 */
1355 r = clock_set_timezone(&min);
1356 if (r < 0)
1357 log_error_errno(r, "Failed to apply local time delta, ignoring: %m");
1358 else
1359 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1360 } else if (!in_initrd()) {
1361 /*
1362 * Do a dummy very first call to seal the kernel's time warp magic.
1363 *
1364 * Do not call this this from inside the initrd. The initrd might not
1365 * carry /etc/adjtime with LOCAL, but the real system could be set up
1366 * that way. In such case, we need to delay the time-warp or the sealing
1367 * until we reach the real system.
1368 *
1369 * Do no set the kernel's timezone. The concept of local time cannot
1370 * be supported reliably, the time will jump or be incorrect at every daylight
1371 * saving time change. All kernel local time concepts will be treated
1372 * as UTC that way.
1373 */
1374 clock_reset_timewarp();
1375 }
1376 }
1377
1378 /* Set the default for later on, but don't actually
1379 * open the logs like this for now. Note that if we
1380 * are transitioning from the initrd there might still
1381 * be journal fd open, and we shouldn't attempt
1382 * opening that before we parsed /proc/cmdline which
1383 * might redirect output elsewhere. */
1384 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1385
1386 } else if (getpid() == 1) {
1387 /* Running inside a container, as PID 1 */
1388 arg_running_as = MANAGER_SYSTEM;
1389 log_set_target(LOG_TARGET_CONSOLE);
1390 log_close_console(); /* force reopen of /dev/console */
1391 log_open();
1392
1393 /* For the later on, see above... */
1394 log_set_target(LOG_TARGET_JOURNAL);
1395
1396 /* clear the kernel timestamp,
1397 * because we are in a container */
1398 kernel_timestamp.monotonic = 0ULL;
1399 kernel_timestamp.realtime = 0ULL;
1400
1401 } else {
1402 /* Running as user instance */
1403 arg_running_as = MANAGER_USER;
1404 log_set_target(LOG_TARGET_AUTO);
1405 log_open();
1406
1407 /* clear the kernel timestamp,
1408 * because we are not PID 1 */
1409 kernel_timestamp = DUAL_TIMESTAMP_NULL;
1410 }
1411
1412 /* Initialize default unit */
1413 r = free_and_strdup(&arg_default_unit, SPECIAL_DEFAULT_TARGET);
1414 if (r < 0) {
1415 log_emergency_errno(r, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET);
1416 error_message = "Failed to set default unit";
1417 goto finish;
1418 }
1419
1420 r = initialize_join_controllers();
1421 if (r < 0) {
1422 error_message = "Failed to initialize cgroup controllers";
1423 goto finish;
1424 }
1425
1426 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1427 * /proc/$PID/fd is available. */
1428 if (getpid() == 1) {
1429
1430 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1431 if (!skip_setup)
1432 kmod_setup();
1433
1434 r = mount_setup(loaded_policy);
1435 if (r < 0) {
1436 error_message = "Failed to mount API filesystems";
1437 goto finish;
1438 }
1439 }
1440
1441 /* Reset all signal handlers. */
1442 (void) reset_all_signal_handlers();
1443 (void) ignore_signals(SIGNALS_IGNORE, -1);
1444
1445 if (parse_config_file() < 0) {
1446 error_message = "Failed to parse config file";
1447 goto finish;
1448 }
1449
1450 if (arg_running_as == MANAGER_SYSTEM) {
1451 r = parse_proc_cmdline(parse_proc_cmdline_item);
1452 if (r < 0)
1453 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
1454 }
1455
1456 /* Note that this also parses bits from the kernel command
1457 * line, including "debug". */
1458 log_parse_environment();
1459
1460 if (parse_argv(argc, argv) < 0) {
1461 error_message = "Failed to parse commandline arguments";
1462 goto finish;
1463 }
1464
1465 if (arg_action == ACTION_TEST &&
1466 geteuid() == 0) {
1467 log_error("Don't run test mode as root.");
1468 goto finish;
1469 }
1470
1471 if (arg_running_as == MANAGER_USER &&
1472 arg_action == ACTION_RUN &&
1473 sd_booted() <= 0) {
1474 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1475 goto finish;
1476 }
1477
1478 if (arg_running_as == MANAGER_SYSTEM &&
1479 arg_action == ACTION_RUN &&
1480 running_in_chroot() > 0) {
1481 log_error("Cannot be run in a chroot() environment.");
1482 goto finish;
1483 }
1484
1485 if (arg_action == ACTION_TEST)
1486 skip_setup = true;
1487
1488 pager_open_if_enabled();
1489
1490 if (arg_action == ACTION_HELP) {
1491 retval = help();
1492 goto finish;
1493 } else if (arg_action == ACTION_VERSION) {
1494 retval = version();
1495 goto finish;
1496 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1497 unit_dump_config_items(stdout);
1498 retval = EXIT_SUCCESS;
1499 goto finish;
1500 } else if (arg_action == ACTION_DONE) {
1501 retval = EXIT_SUCCESS;
1502 goto finish;
1503 }
1504
1505 if (arg_running_as == MANAGER_USER &&
1506 !getenv("XDG_RUNTIME_DIR")) {
1507 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1508 goto finish;
1509 }
1510
1511 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1512
1513 /* Close logging fds, in order not to confuse fdset below */
1514 log_close();
1515
1516 /* Remember open file descriptors for later deserialization */
1517 r = fdset_new_fill(&fds);
1518 if (r < 0) {
1519 log_emergency_errno(r, "Failed to allocate fd set: %m");
1520 error_message = "Failed to allocate fd set";
1521 goto finish;
1522 } else
1523 fdset_cloexec(fds, true);
1524
1525 if (arg_serialization)
1526 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1527
1528 if (arg_running_as == MANAGER_SYSTEM)
1529 /* Become a session leader if we aren't one yet. */
1530 setsid();
1531
1532 /* Move out of the way, so that we won't block unmounts */
1533 assert_se(chdir("/") == 0);
1534
1535 /* Reset the console, but only if this is really init and we
1536 * are freshly booted */
1537 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1538
1539 /* If we are init, we connect stdin/stdout/stderr to
1540 * /dev/null and make sure we don't have a controlling
1541 * tty. */
1542 release_terminal();
1543
1544 if (getpid() == 1 && !skip_setup)
1545 console_setup();
1546 }
1547
1548 /* Open the logging devices, if possible and necessary */
1549 log_open();
1550
1551 if (arg_show_status == _SHOW_STATUS_UNSET)
1552 arg_show_status = SHOW_STATUS_YES;
1553
1554 /* Make sure we leave a core dump without panicing the
1555 * kernel. */
1556 if (getpid() == 1) {
1557 install_crash_handler();
1558
1559 r = mount_cgroup_controllers(arg_join_controllers);
1560 if (r < 0)
1561 goto finish;
1562 }
1563
1564 if (arg_running_as == MANAGER_SYSTEM) {
1565 int v;
1566
1567 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1568 arg_action == ACTION_TEST ? "test " : "" );
1569
1570 v = detect_virtualization();
1571 if (v > 0)
1572 log_info("Detected virtualization %s.", virtualization_to_string(v));
1573
1574 write_container_id();
1575
1576 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1577
1578 if (in_initrd())
1579 log_info("Running in initial RAM disk.");
1580
1581 /* Let's check whether /etc is already populated. We
1582 * don't actually really check for that, but use
1583 * /etc/machine-id as flag file. This allows container
1584 * managers and installers to provision a couple of
1585 * files already. If the container manager wants to
1586 * provision the machine ID itself it should pass
1587 * $container_uuid to PID 1. */
1588
1589 empty_etc = access("/etc/machine-id", F_OK) < 0;
1590 if (empty_etc)
1591 log_info("Running with unpopulated /etc.");
1592 } else {
1593 _cleanup_free_ char *t;
1594
1595 t = uid_to_name(getuid());
1596 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1597 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1598 }
1599
1600 if (arg_running_as == MANAGER_SYSTEM && !skip_setup) {
1601 if (arg_show_status > 0)
1602 status_welcome();
1603
1604 hostname_setup();
1605 machine_id_setup(NULL);
1606 loopback_setup();
1607
1608 test_mtab();
1609 test_usr();
1610 }
1611
1612 if (arg_running_as == MANAGER_SYSTEM && arg_runtime_watchdog > 0)
1613 watchdog_set_timeout(&arg_runtime_watchdog);
1614
1615 if (arg_timer_slack_nsec != NSEC_INFINITY)
1616 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1617 log_error_errno(errno, "Failed to adjust timer slack: %m");
1618
1619 if (arg_capability_bounding_set_drop) {
1620 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1621 if (r < 0) {
1622 log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m");
1623 error_message = "Failed to drop capability bounding set of usermode helpers";
1624 goto finish;
1625 }
1626 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1627 if (r < 0) {
1628 log_emergency_errno(r, "Failed to drop capability bounding set: %m");
1629 error_message = "Failed to drop capability bounding set";
1630 goto finish;
1631 }
1632 }
1633
1634 if (arg_syscall_archs) {
1635 r = enforce_syscall_archs(arg_syscall_archs);
1636 if (r < 0) {
1637 error_message = "Failed to set syscall architectures";
1638 goto finish;
1639 }
1640 }
1641
1642 if (arg_running_as == MANAGER_USER)
1643 /* Become reaper of our children */
1644 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0)
1645 log_warning_errno(errno, "Failed to make us a subreaper: %m");
1646
1647 if (arg_running_as == MANAGER_SYSTEM) {
1648 bump_rlimit_nofile(&saved_rlimit_nofile);
1649
1650 if (empty_etc) {
1651 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_ENABLE_ONLY, false, NULL, 0);
1652 if (r < 0)
1653 log_warning_errno(r, "Failed to populate /etc with preset unit settings, ignoring: %m");
1654 else
1655 log_info("Populated /etc with preset unit settings.");
1656 }
1657 }
1658
1659 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1660 if (r < 0) {
1661 log_emergency_errno(r, "Failed to allocate manager object: %m");
1662 error_message = "Failed to allocate manager object";
1663 goto finish;
1664 }
1665
1666 m->confirm_spawn = arg_confirm_spawn;
1667 m->runtime_watchdog = arg_runtime_watchdog;
1668 m->shutdown_watchdog = arg_shutdown_watchdog;
1669 m->userspace_timestamp = userspace_timestamp;
1670 m->kernel_timestamp = kernel_timestamp;
1671 m->initrd_timestamp = initrd_timestamp;
1672 m->security_start_timestamp = security_start_timestamp;
1673 m->security_finish_timestamp = security_finish_timestamp;
1674
1675 manager_set_defaults(m);
1676 manager_set_show_status(m, arg_show_status);
1677 manager_set_first_boot(m, empty_etc);
1678
1679 /* Remember whether we should queue the default job */
1680 queue_default_job = !arg_serialization || arg_switched_root;
1681
1682 before_startup = now(CLOCK_MONOTONIC);
1683
1684 r = manager_startup(m, arg_serialization, fds);
1685 if (r < 0)
1686 log_error_errno(r, "Failed to fully start up daemon: %m");
1687
1688 /* This will close all file descriptors that were opened, but
1689 * not claimed by any unit. */
1690 fds = fdset_free(fds);
1691
1692 arg_serialization = safe_fclose(arg_serialization);
1693
1694 if (queue_default_job) {
1695 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1696 Unit *target = NULL;
1697 Job *default_unit_job;
1698
1699 log_debug("Activating default unit: %s", arg_default_unit);
1700
1701 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1702 if (r < 0)
1703 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1704 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1705 log_error_errno(target->load_error, "Failed to load default target: %m");
1706 else if (target->load_state == UNIT_MASKED)
1707 log_error("Default target masked.");
1708
1709 if (!target || target->load_state != UNIT_LOADED) {
1710 log_info("Trying to load rescue target...");
1711
1712 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1713 if (r < 0) {
1714 log_emergency("Failed to load rescue target: %s", bus_error_message(&error, r));
1715 error_message = "Failed to load rescue target";
1716 goto finish;
1717 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1718 log_emergency_errno(target->load_error, "Failed to load rescue target: %m");
1719 error_message = "Failed to load rescue target";
1720 goto finish;
1721 } else if (target->load_state == UNIT_MASKED) {
1722 log_emergency("Rescue target masked.");
1723 error_message = "Rescue target masked";
1724 goto finish;
1725 }
1726 }
1727
1728 assert(target->load_state == UNIT_LOADED);
1729
1730 if (arg_action == ACTION_TEST) {
1731 printf("-> By units:\n");
1732 manager_dump_units(m, stdout, "\t");
1733 }
1734
1735 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1736 if (r == -EPERM) {
1737 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1738
1739 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1740 if (r < 0) {
1741 log_emergency("Failed to start default target: %s", bus_error_message(&error, r));
1742 error_message = "Failed to start default target";
1743 goto finish;
1744 }
1745 } else if (r < 0) {
1746 log_emergency("Failed to isolate default target: %s", bus_error_message(&error, r));
1747 error_message = "Failed to isolate default target";
1748 goto finish;
1749 }
1750
1751 m->default_unit_job_id = default_unit_job->id;
1752
1753 after_startup = now(CLOCK_MONOTONIC);
1754 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1755 "Loaded units and determined initial transaction in %s.",
1756 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
1757
1758 if (arg_action == ACTION_TEST) {
1759 printf("-> By jobs:\n");
1760 manager_dump_jobs(m, stdout, "\t");
1761 retval = EXIT_SUCCESS;
1762 goto finish;
1763 }
1764 }
1765
1766 for (;;) {
1767 r = manager_loop(m);
1768 if (r < 0) {
1769 log_emergency_errno(r, "Failed to run main loop: %m");
1770 error_message = "Failed to run main loop";
1771 goto finish;
1772 }
1773
1774 switch (m->exit_code) {
1775
1776 case MANAGER_RELOAD:
1777 log_info("Reloading.");
1778
1779 r = parse_config_file();
1780 if (r < 0)
1781 log_error("Failed to parse config file.");
1782
1783 manager_set_defaults(m);
1784
1785 r = manager_reload(m);
1786 if (r < 0)
1787 log_error_errno(r, "Failed to reload: %m");
1788 break;
1789
1790 case MANAGER_REEXECUTE:
1791
1792 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0) {
1793 error_message = "Failed to prepare for reexecution";
1794 goto finish;
1795 }
1796
1797 reexecute = true;
1798 log_notice("Reexecuting.");
1799 goto finish;
1800
1801 case MANAGER_SWITCH_ROOT:
1802 /* Steal the switch root parameters */
1803 switch_root_dir = m->switch_root;
1804 switch_root_init = m->switch_root_init;
1805 m->switch_root = m->switch_root_init = NULL;
1806
1807 if (!switch_root_init)
1808 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0) {
1809 error_message = "Failed to prepare for reexecution";
1810 goto finish;
1811 }
1812
1813 reexecute = true;
1814 log_notice("Switching root.");
1815 goto finish;
1816
1817 case MANAGER_EXIT:
1818 retval = m->return_value;
1819
1820 if (m->running_as == MANAGER_USER) {
1821 log_debug("Exit.");
1822 goto finish;
1823 }
1824
1825 /* fallthrough */
1826 case MANAGER_REBOOT:
1827 case MANAGER_POWEROFF:
1828 case MANAGER_HALT:
1829 case MANAGER_KEXEC: {
1830 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1831 [MANAGER_EXIT] = "exit",
1832 [MANAGER_REBOOT] = "reboot",
1833 [MANAGER_POWEROFF] = "poweroff",
1834 [MANAGER_HALT] = "halt",
1835 [MANAGER_KEXEC] = "kexec"
1836 };
1837
1838 assert_se(shutdown_verb = table[m->exit_code]);
1839 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1840
1841 log_notice("Shutting down.");
1842 goto finish;
1843 }
1844
1845 default:
1846 assert_not_reached("Unknown exit code.");
1847 }
1848 }
1849
1850 finish:
1851 pager_close();
1852
1853 if (m)
1854 arg_shutdown_watchdog = m->shutdown_watchdog;
1855
1856 m = manager_free(m);
1857
1858 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++)
1859 arg_default_rlimit[j] = mfree(arg_default_rlimit[j]);
1860
1861 arg_default_unit = mfree(arg_default_unit);
1862 arg_join_controllers = strv_free_free(arg_join_controllers);
1863 arg_default_environment = strv_free(arg_default_environment);
1864 arg_syscall_archs = set_free(arg_syscall_archs);
1865
1866 mac_selinux_finish();
1867
1868 if (reexecute) {
1869 const char **args;
1870 unsigned i, args_size;
1871
1872 /* Close and disarm the watchdog, so that the new
1873 * instance can reinitialize it, but doesn't get
1874 * rebooted while we do that */
1875 watchdog_close(true);
1876
1877 /* Reset the RLIMIT_NOFILE to the kernel default, so
1878 * that the new systemd can pass the kernel default to
1879 * its child processes */
1880 if (saved_rlimit_nofile.rlim_cur > 0)
1881 (void) setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1882
1883 if (switch_root_dir) {
1884 /* Kill all remaining processes from the
1885 * initrd, but don't wait for them, so that we
1886 * can handle the SIGCHLD for them after
1887 * deserializing. */
1888 broadcast_signal(SIGTERM, false, true);
1889
1890 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1891 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1892 if (r < 0)
1893 log_error_errno(r, "Failed to switch root, trying to continue: %m");
1894 }
1895
1896 args_size = MAX(6, argc+1);
1897 args = newa(const char*, args_size);
1898
1899 if (!switch_root_init) {
1900 char sfd[DECIMAL_STR_MAX(int) + 1];
1901
1902 /* First try to spawn ourselves with the right
1903 * path, and with full serialization. We do
1904 * this only if the user didn't specify an
1905 * explicit init to spawn. */
1906
1907 assert(arg_serialization);
1908 assert(fds);
1909
1910 xsprintf(sfd, "%i", fileno(arg_serialization));
1911
1912 i = 0;
1913 args[i++] = SYSTEMD_BINARY_PATH;
1914 if (switch_root_dir)
1915 args[i++] = "--switched-root";
1916 args[i++] = arg_running_as == MANAGER_SYSTEM ? "--system" : "--user";
1917 args[i++] = "--deserialize";
1918 args[i++] = sfd;
1919 args[i++] = NULL;
1920
1921 /* do not pass along the environment we inherit from the kernel or initrd */
1922 if (switch_root_dir)
1923 (void) clearenv();
1924
1925 assert(i <= args_size);
1926 (void) execv(args[0], (char* const*) args);
1927 }
1928
1929 /* Try the fallback, if there is any, without any
1930 * serialization. We pass the original argv[] and
1931 * envp[]. (Well, modulo the ordering changes due to
1932 * getopt() in argv[], and some cleanups in envp[],
1933 * but let's hope that doesn't matter.) */
1934
1935 arg_serialization = safe_fclose(arg_serialization);
1936 fds = fdset_free(fds);
1937
1938 /* Reopen the console */
1939 (void) make_console_stdio();
1940
1941 for (j = 1, i = 1; j < (unsigned) argc; j++)
1942 args[i++] = argv[j];
1943 args[i++] = NULL;
1944 assert(i <= args_size);
1945
1946 /* Reenable any blocked signals, especially important
1947 * if we switch from initial ramdisk to init=... */
1948 (void) reset_all_signal_handlers();
1949 (void) reset_signal_mask();
1950
1951 if (switch_root_init) {
1952 args[0] = switch_root_init;
1953 (void) execv(args[0], (char* const*) args);
1954 log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");
1955 }
1956
1957 args[0] = "/sbin/init";
1958 (void) execv(args[0], (char* const*) args);
1959
1960 if (errno == ENOENT) {
1961 log_warning("No /sbin/init, trying fallback");
1962
1963 args[0] = "/bin/sh";
1964 args[1] = NULL;
1965 (void) execv(args[0], (char* const*) args);
1966 log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m");
1967 } else
1968 log_warning_errno(errno, "Failed to execute /sbin/init, giving up: %m");
1969 }
1970
1971 arg_serialization = safe_fclose(arg_serialization);
1972 fds = fdset_free(fds);
1973
1974 #ifdef HAVE_VALGRIND_VALGRIND_H
1975 /* If we are PID 1 and running under valgrind, then let's exit
1976 * here explicitly. valgrind will only generate nice output on
1977 * exit(), not on exec(), hence let's do the former not the
1978 * latter here. */
1979 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1980 return 0;
1981 #endif
1982
1983 if (shutdown_verb) {
1984 char log_level[DECIMAL_STR_MAX(int) + 1];
1985 char exit_code[DECIMAL_STR_MAX(uint8_t) + 1];
1986 const char* command_line[11] = {
1987 SYSTEMD_SHUTDOWN_BINARY_PATH,
1988 shutdown_verb,
1989 "--log-level", log_level,
1990 "--log-target",
1991 };
1992 unsigned pos = 5;
1993 _cleanup_strv_free_ char **env_block = NULL;
1994
1995 assert(command_line[pos] == NULL);
1996 env_block = strv_copy(environ);
1997
1998 xsprintf(log_level, "%d", log_get_max_level());
1999
2000 switch (log_get_target()) {
2001
2002 case LOG_TARGET_KMSG:
2003 case LOG_TARGET_JOURNAL_OR_KMSG:
2004 case LOG_TARGET_SYSLOG_OR_KMSG:
2005 command_line[pos++] = "kmsg";
2006 break;
2007
2008 case LOG_TARGET_NULL:
2009 command_line[pos++] = "null";
2010 break;
2011
2012 case LOG_TARGET_CONSOLE:
2013 default:
2014 command_line[pos++] = "console";
2015 break;
2016 };
2017
2018 if (log_get_show_color())
2019 command_line[pos++] = "--log-color";
2020
2021 if (log_get_show_location())
2022 command_line[pos++] = "--log-location";
2023
2024 if (streq(shutdown_verb, "exit")) {
2025 command_line[pos++] = "--exit-code";
2026 command_line[pos++] = exit_code;
2027 xsprintf(exit_code, "%d", retval);
2028 }
2029
2030 assert(pos < ELEMENTSOF(command_line));
2031
2032 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2033 char *e;
2034
2035 /* If we reboot let's set the shutdown
2036 * watchdog and tell the shutdown binary to
2037 * repeatedly ping it */
2038 r = watchdog_set_timeout(&arg_shutdown_watchdog);
2039 watchdog_close(r < 0);
2040
2041 /* Tell the binary how often to ping, ignore failure */
2042 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2043 (void) strv_push(&env_block, e);
2044 } else
2045 watchdog_close(true);
2046
2047 /* Avoid the creation of new processes forked by the
2048 * kernel; at this point, we will not listen to the
2049 * signals anyway */
2050 if (detect_container() <= 0)
2051 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2052
2053 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2054 log_error_errno(errno, "Failed to execute shutdown binary, %s: %m",
2055 getpid() == 1 ? "freezing" : "quitting");
2056 }
2057
2058 if (getpid() == 1) {
2059 if (error_message)
2060 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
2061 ANSI_HIGHLIGHT_RED "!!!!!!" ANSI_NORMAL,
2062 "%s, freezing.", error_message);
2063 freeze_or_reboot();
2064 }
2065
2066 return retval;
2067 }
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