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