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