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core: only set the kernel's timezone when the RTC runs in local time
[thirdparty/systemd.git] / src / core / main.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include <stdio.h>
23 #include <errno.h>
24 #include <string.h>
25 #include <unistd.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <getopt.h>
29 #include <signal.h>
30 #include <sys/wait.h>
31 #include <fcntl.h>
32 #include <sys/prctl.h>
33 #include <sys/mount.h>
34
35 #ifdef HAVE_VALGRIND_VALGRIND_H
36 #include <valgrind/valgrind.h>
37 #endif
38 #ifdef HAVE_SECCOMP
39 #include <seccomp.h>
40 #endif
41
42 #include "sd-daemon.h"
43 #include "sd-messages.h"
44 #include "sd-bus.h"
45 #include "manager.h"
46 #include "log.h"
47 #include "load-fragment.h"
48 #include "fdset.h"
49 #include "special.h"
50 #include "conf-parser.h"
51 #include "missing.h"
52 #include "label.h"
53 #include "pager.h"
54 #include "build.h"
55 #include "strv.h"
56 #include "def.h"
57 #include "virt.h"
58 #include "architecture.h"
59 #include "watchdog.h"
60 #include "path-util.h"
61 #include "switch-root.h"
62 #include "capability.h"
63 #include "killall.h"
64 #include "env-util.h"
65 #include "clock-util.h"
66 #include "fileio.h"
67 #include "dbus-manager.h"
68 #include "bus-error.h"
69 #include "bus-util.h"
70
71 #include "mount-setup.h"
72 #include "loopback-setup.h"
73 #include "hostname-setup.h"
74 #include "machine-id-setup.h"
75 #include "selinux-setup.h"
76 #include "ima-setup.h"
77 #include "smack-setup.h"
78 #ifdef HAVE_KMOD
79 #include "kmod-setup.h"
80 #endif
81
82 static 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;
90 static char *arg_default_unit = NULL;
91 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
92 static bool arg_dump_core = true;
93 static bool arg_crash_shell = false;
94 static int arg_crash_chvt = -1;
95 static bool arg_confirm_spawn = false;
96 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
97 static bool arg_switched_root = false;
98 static int arg_no_pager = -1;
99 static char ***arg_join_controllers = NULL;
100 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
101 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
102 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
103 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
104 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
105 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
106 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
107 static usec_t arg_runtime_watchdog = 0;
108 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
109 static char **arg_default_environment = NULL;
110 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
111 static uint64_t arg_capability_bounding_set_drop = 0;
112 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
113 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
114 static Set* arg_syscall_archs = NULL;
115 static FILE* arg_serialization = NULL;
116 static bool arg_default_cpu_accounting = false;
117 static bool arg_default_blockio_accounting = false;
118 static bool arg_default_memory_accounting = false;
119
120 static void nop_handler(int sig) {}
121
122 static void pager_open_if_enabled(void) {
123
124 if (arg_no_pager <= 0)
125 return;
126
127 pager_open(false);
128 }
129
130 noreturn static void crash(int sig) {
131
132 if (getpid() != 1)
133 /* Pass this on immediately, if this is not PID 1 */
134 raise(sig);
135 else if (!arg_dump_core)
136 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
137 else {
138 struct sigaction sa = {
139 .sa_handler = nop_handler,
140 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
141 };
142 pid_t pid;
143
144 /* We want to wait for the core process, hence let's enable SIGCHLD */
145 sigaction(SIGCHLD, &sa, NULL);
146
147 pid = fork();
148 if (pid < 0)
149 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
150
151 else if (pid == 0) {
152 struct rlimit rl = {};
153
154 /* Enable default signal handler for core dump */
155 zero(sa);
156 sa.sa_handler = SIG_DFL;
157 sigaction(sig, &sa, NULL);
158
159 /* Don't limit the core dump size */
160 rl.rlim_cur = RLIM_INFINITY;
161 rl.rlim_max = RLIM_INFINITY;
162 setrlimit(RLIMIT_CORE, &rl);
163
164 /* Just to be sure... */
165 chdir("/");
166
167 /* Raise the signal again */
168 raise(sig);
169
170 assert_not_reached("We shouldn't be here...");
171 _exit(1);
172
173 } else {
174 siginfo_t status;
175 int r;
176
177 /* Order things nicely. */
178 r = wait_for_terminate(pid, &status);
179 if (r < 0)
180 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
181 else if (status.si_code != CLD_DUMPED)
182 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
183 else
184 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
185 }
186 }
187
188 if (arg_crash_chvt)
189 chvt(arg_crash_chvt);
190
191 if (arg_crash_shell) {
192 struct sigaction sa = {
193 .sa_handler = SIG_IGN,
194 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
195 };
196 pid_t pid;
197
198 log_info("Executing crash shell in 10s...");
199 sleep(10);
200
201 /* Let the kernel reap children for us */
202 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
203
204 pid = fork();
205 if (pid < 0)
206 log_error("Failed to fork off crash shell: %m");
207 else if (pid == 0) {
208 make_console_stdio();
209 execl("/bin/sh", "/bin/sh", NULL);
210
211 log_error("execl() failed: %m");
212 _exit(1);
213 }
214
215 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
216 }
217
218 log_info("Freezing execution.");
219 freeze();
220 }
221
222 static void install_crash_handler(void) {
223 struct sigaction sa = {
224 .sa_handler = crash,
225 .sa_flags = SA_NODEFER,
226 };
227
228 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
229 }
230
231 static int console_setup(bool do_reset) {
232 int tty_fd, r;
233
234 /* If we are init, we connect stdin/stdout/stderr to /dev/null
235 * and make sure we don't have a controlling tty. */
236
237 release_terminal();
238
239 if (!do_reset)
240 return 0;
241
242 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
243 if (tty_fd < 0) {
244 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
245 return -tty_fd;
246 }
247
248 /* We don't want to force text mode.
249 * plymouth may be showing pictures already from initrd. */
250 r = reset_terminal_fd(tty_fd, false);
251 if (r < 0)
252 log_error("Failed to reset /dev/console: %s", strerror(-r));
253
254 safe_close(tty_fd);
255 return r;
256 }
257
258 static int set_default_unit(const char *u) {
259 char *c;
260
261 assert(u);
262
263 c = strdup(u);
264 if (!c)
265 return -ENOMEM;
266
267 free(arg_default_unit);
268 arg_default_unit = c;
269
270 return 0;
271 }
272
273 static int parse_proc_cmdline_item(const char *key, const char *value) {
274
275 static const char * const rlmap[] = {
276 "emergency", SPECIAL_EMERGENCY_TARGET,
277 "-b", SPECIAL_EMERGENCY_TARGET,
278 "single", SPECIAL_RESCUE_TARGET,
279 "-s", SPECIAL_RESCUE_TARGET,
280 "s", SPECIAL_RESCUE_TARGET,
281 "S", SPECIAL_RESCUE_TARGET,
282 "1", SPECIAL_RESCUE_TARGET,
283 "2", SPECIAL_RUNLEVEL2_TARGET,
284 "3", SPECIAL_RUNLEVEL3_TARGET,
285 "4", SPECIAL_RUNLEVEL4_TARGET,
286 "5", SPECIAL_RUNLEVEL5_TARGET,
287 };
288 int r;
289
290 assert(key);
291
292 if (streq(key, "systemd.unit") && value) {
293
294 if (!in_initrd())
295 return set_default_unit(value);
296
297 } else if (streq(key, "rd.systemd.unit") && value) {
298
299 if (in_initrd())
300 return set_default_unit(value);
301
302 } else if (streq(key, "systemd.log_target") && value) {
303
304 if (log_set_target_from_string(value) < 0)
305 log_warning("Failed to parse log target %s. Ignoring.", value);
306
307 } else if (streq(key, "systemd.log_level") && value) {
308
309 if (log_set_max_level_from_string(value) < 0)
310 log_warning("Failed to parse log level %s. Ignoring.", value);
311
312 } else if (streq(key, "systemd.log_color") && value) {
313
314 if (log_show_color_from_string(value) < 0)
315 log_warning("Failed to parse log color setting %s. Ignoring.", value);
316
317 } else if (streq(key, "systemd.log_location") && value) {
318
319 if (log_show_location_from_string(value) < 0)
320 log_warning("Failed to parse log location setting %s. Ignoring.", value);
321
322 } else if (streq(key, "systemd.dump_core") && value) {
323
324 r = parse_boolean(value);
325 if (r < 0)
326 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
327 else
328 arg_dump_core = r;
329
330 } else if (streq(key, "systemd.crash_shell") && value) {
331
332 r = parse_boolean(value);
333 if (r < 0)
334 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
335 else
336 arg_crash_shell = r;
337
338 } else if (streq(key, "systemd.crash_chvt") && value) {
339
340 if (safe_atoi(value, &r) < 0)
341 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
342 else
343 arg_crash_chvt = r;
344
345 } else if (streq(key, "systemd.confirm_spawn") && value) {
346
347 r = parse_boolean(value);
348 if (r < 0)
349 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
350 else
351 arg_confirm_spawn = r;
352
353 } else if (streq(key, "systemd.show_status") && value) {
354
355 r = parse_show_status(value, &arg_show_status);
356 if (r < 0)
357 log_warning("Failed to parse show status switch %s. Ignoring.", value);
358
359 } else if (streq(key, "systemd.default_standard_output") && value) {
360
361 r = exec_output_from_string(value);
362 if (r < 0)
363 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
364 else
365 arg_default_std_output = r;
366
367 } else if (streq(key, "systemd.default_standard_error") && value) {
368
369 r = exec_output_from_string(value);
370 if (r < 0)
371 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
372 else
373 arg_default_std_error = r;
374
375 } else if (streq(key, "systemd.setenv") && value) {
376
377 if (env_assignment_is_valid(value)) {
378 char **env;
379
380 env = strv_env_set(arg_default_environment, value);
381 if (env)
382 arg_default_environment = env;
383 else
384 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
385 } else
386 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
387
388 } else if (streq(key, "quiet") && !value) {
389
390 log_set_max_level(LOG_NOTICE);
391
392 if (arg_show_status == _SHOW_STATUS_UNSET)
393 arg_show_status = SHOW_STATUS_AUTO;
394
395 } else if (streq(key, "debug") && !value) {
396
397 log_set_max_level(LOG_DEBUG);
398
399 if (detect_container(NULL) > 0)
400 log_set_target(LOG_TARGET_CONSOLE);
401
402 } else if (!in_initrd() && !value) {
403 unsigned i;
404
405 /* SysV compatibility */
406 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
407 if (streq(key, rlmap[i]))
408 return set_default_unit(rlmap[i+1]);
409 }
410
411 return 0;
412 }
413
414 #define DEFINE_SETTER(name, func, descr) \
415 static int name(const char *unit, \
416 const char *filename, \
417 unsigned line, \
418 const char *section, \
419 unsigned section_line, \
420 const char *lvalue, \
421 int ltype, \
422 const char *rvalue, \
423 void *data, \
424 void *userdata) { \
425 \
426 int r; \
427 \
428 assert(filename); \
429 assert(lvalue); \
430 assert(rvalue); \
431 \
432 r = func(rvalue); \
433 if (r < 0) \
434 log_syntax(unit, LOG_ERR, filename, line, -r, \
435 "Invalid " descr "'%s': %s", \
436 rvalue, strerror(-r)); \
437 \
438 return 0; \
439 }
440
441 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
442 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
443 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
444 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
445
446 static int config_parse_cpu_affinity2(
447 const char *unit,
448 const char *filename,
449 unsigned line,
450 const char *section,
451 unsigned section_line,
452 const char *lvalue,
453 int ltype,
454 const char *rvalue,
455 void *data,
456 void *userdata) {
457
458 char *w;
459 size_t l;
460 char *state;
461 cpu_set_t *c = NULL;
462 unsigned ncpus = 0;
463
464 assert(filename);
465 assert(lvalue);
466 assert(rvalue);
467
468 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
469 char *t;
470 int r;
471 unsigned cpu;
472
473 if (!(t = strndup(w, l)))
474 return log_oom();
475
476 r = safe_atou(t, &cpu);
477 free(t);
478
479 if (!c)
480 if (!(c = cpu_set_malloc(&ncpus)))
481 return log_oom();
482
483 if (r < 0 || cpu >= ncpus) {
484 log_syntax(unit, LOG_ERR, filename, line, -r,
485 "Failed to parse CPU affinity '%s'", rvalue);
486 CPU_FREE(c);
487 return -EBADMSG;
488 }
489
490 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
491 }
492
493 if (c) {
494 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
495 log_warning_unit(unit, "Failed to set CPU affinity: %m");
496
497 CPU_FREE(c);
498 }
499
500 return 0;
501 }
502
503 static int config_parse_show_status(
504 const char* unit,
505 const char *filename,
506 unsigned line,
507 const char *section,
508 unsigned section_line,
509 const char *lvalue,
510 int ltype,
511 const char *rvalue,
512 void *data,
513 void *userdata) {
514
515 int k;
516 ShowStatus *b = data;
517
518 assert(filename);
519 assert(lvalue);
520 assert(rvalue);
521 assert(data);
522
523 k = parse_show_status(rvalue, b);
524 if (k < 0) {
525 log_syntax(unit, LOG_ERR, filename, line, -k,
526 "Failed to parse show status setting, ignoring: %s", rvalue);
527 return 0;
528 }
529
530 return 0;
531 }
532
533 static void strv_free_free(char ***l) {
534 char ***i;
535
536 if (!l)
537 return;
538
539 for (i = l; *i; i++)
540 strv_free(*i);
541
542 free(l);
543 }
544
545 static void free_join_controllers(void) {
546 strv_free_free(arg_join_controllers);
547 arg_join_controllers = NULL;
548 }
549
550 static int config_parse_join_controllers(const char *unit,
551 const char *filename,
552 unsigned line,
553 const char *section,
554 unsigned section_line,
555 const char *lvalue,
556 int ltype,
557 const char *rvalue,
558 void *data,
559 void *userdata) {
560
561 unsigned n = 0;
562 char *state, *w;
563 size_t length;
564
565 assert(filename);
566 assert(lvalue);
567 assert(rvalue);
568
569 free_join_controllers();
570
571 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
572 char *s, **l;
573
574 s = strndup(w, length);
575 if (!s)
576 return log_oom();
577
578 l = strv_split(s, ",");
579 free(s);
580
581 strv_uniq(l);
582
583 if (strv_length(l) <= 1) {
584 strv_free(l);
585 continue;
586 }
587
588 if (!arg_join_controllers) {
589 arg_join_controllers = new(char**, 2);
590 if (!arg_join_controllers) {
591 strv_free(l);
592 return log_oom();
593 }
594
595 arg_join_controllers[0] = l;
596 arg_join_controllers[1] = NULL;
597
598 n = 1;
599 } else {
600 char ***a;
601 char ***t;
602
603 t = new0(char**, n+2);
604 if (!t) {
605 strv_free(l);
606 return log_oom();
607 }
608
609 n = 0;
610
611 for (a = arg_join_controllers; *a; a++) {
612
613 if (strv_overlap(*a, l)) {
614 if (strv_extend_strv(&l, *a) < 0) {
615 strv_free(l);
616 strv_free_free(t);
617 return log_oom();
618 }
619
620 } else {
621 char **c;
622
623 c = strv_copy(*a);
624 if (!c) {
625 strv_free(l);
626 strv_free_free(t);
627 return log_oom();
628 }
629
630 t[n++] = c;
631 }
632 }
633
634 t[n++] = strv_uniq(l);
635
636 strv_free_free(arg_join_controllers);
637 arg_join_controllers = t;
638 }
639 }
640
641 return 0;
642 }
643
644 static int parse_config_file(void) {
645
646 const ConfigTableItem items[] = {
647 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
648 { "Manager", "LogTarget", config_parse_target, 0, NULL },
649 { "Manager", "LogColor", config_parse_color, 0, NULL },
650 { "Manager", "LogLocation", config_parse_location, 0, NULL },
651 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
652 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
653 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
654 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
655 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
656 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
657 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
658 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
659 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
660 #ifdef HAVE_SECCOMP
661 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
662 #endif
663 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
664 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
665 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
666 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
667 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
668 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
669 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
670 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
671 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
672 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
673 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
674 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
675 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
676 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
677 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
678 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
679 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
680 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
681 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
682 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
683 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
684 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
685 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
686 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
687 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
688 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
689 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
690 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
691 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
692 {}
693 };
694
695 const char *fn;
696
697 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
698 config_parse(NULL, fn, NULL,
699 "Manager\0",
700 config_item_table_lookup, items,
701 false, false, true, NULL);
702
703 return 0;
704 }
705
706 static int parse_argv(int argc, char *argv[]) {
707
708 enum {
709 ARG_LOG_LEVEL = 0x100,
710 ARG_LOG_TARGET,
711 ARG_LOG_COLOR,
712 ARG_LOG_LOCATION,
713 ARG_UNIT,
714 ARG_SYSTEM,
715 ARG_USER,
716 ARG_TEST,
717 ARG_NO_PAGER,
718 ARG_VERSION,
719 ARG_DUMP_CONFIGURATION_ITEMS,
720 ARG_DUMP_CORE,
721 ARG_CRASH_SHELL,
722 ARG_CONFIRM_SPAWN,
723 ARG_SHOW_STATUS,
724 ARG_DESERIALIZE,
725 ARG_SWITCHED_ROOT,
726 ARG_DEFAULT_STD_OUTPUT,
727 ARG_DEFAULT_STD_ERROR
728 };
729
730 static const struct option options[] = {
731 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
732 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
733 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
734 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
735 { "unit", required_argument, NULL, ARG_UNIT },
736 { "system", no_argument, NULL, ARG_SYSTEM },
737 { "user", no_argument, NULL, ARG_USER },
738 { "test", no_argument, NULL, ARG_TEST },
739 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
740 { "help", no_argument, NULL, 'h' },
741 { "version", no_argument, NULL, ARG_VERSION },
742 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
743 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
744 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
745 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
746 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
747 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
748 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
749 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
750 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
751 {}
752 };
753
754 int c, r;
755
756 assert(argc >= 1);
757 assert(argv);
758
759 if (getpid() == 1)
760 opterr = 0;
761
762 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
763
764 switch (c) {
765
766 case ARG_LOG_LEVEL:
767 r = log_set_max_level_from_string(optarg);
768 if (r < 0) {
769 log_error("Failed to parse log level %s.", optarg);
770 return r;
771 }
772
773 break;
774
775 case ARG_LOG_TARGET:
776 r = log_set_target_from_string(optarg);
777 if (r < 0) {
778 log_error("Failed to parse log target %s.", optarg);
779 return r;
780 }
781
782 break;
783
784 case ARG_LOG_COLOR:
785
786 if (optarg) {
787 r = log_show_color_from_string(optarg);
788 if (r < 0) {
789 log_error("Failed to parse log color setting %s.", optarg);
790 return r;
791 }
792 } else
793 log_show_color(true);
794
795 break;
796
797 case ARG_LOG_LOCATION:
798 if (optarg) {
799 r = log_show_location_from_string(optarg);
800 if (r < 0) {
801 log_error("Failed to parse log location setting %s.", optarg);
802 return r;
803 }
804 } else
805 log_show_location(true);
806
807 break;
808
809 case ARG_DEFAULT_STD_OUTPUT:
810 r = exec_output_from_string(optarg);
811 if (r < 0) {
812 log_error("Failed to parse default standard output setting %s.", optarg);
813 return r;
814 } else
815 arg_default_std_output = r;
816 break;
817
818 case ARG_DEFAULT_STD_ERROR:
819 r = exec_output_from_string(optarg);
820 if (r < 0) {
821 log_error("Failed to parse default standard error output setting %s.", optarg);
822 return r;
823 } else
824 arg_default_std_error = r;
825 break;
826
827 case ARG_UNIT:
828
829 r = set_default_unit(optarg);
830 if (r < 0) {
831 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
832 return r;
833 }
834
835 break;
836
837 case ARG_SYSTEM:
838 arg_running_as = SYSTEMD_SYSTEM;
839 break;
840
841 case ARG_USER:
842 arg_running_as = SYSTEMD_USER;
843 break;
844
845 case ARG_TEST:
846 arg_action = ACTION_TEST;
847 if (arg_no_pager < 0)
848 arg_no_pager = true;
849 break;
850
851 case ARG_NO_PAGER:
852 arg_no_pager = true;
853 break;
854
855 case ARG_VERSION:
856 arg_action = ACTION_VERSION;
857 break;
858
859 case ARG_DUMP_CONFIGURATION_ITEMS:
860 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
861 break;
862
863 case ARG_DUMP_CORE:
864 r = optarg ? parse_boolean(optarg) : 1;
865 if (r < 0) {
866 log_error("Failed to parse dump core boolean %s.", optarg);
867 return r;
868 }
869 arg_dump_core = r;
870 break;
871
872 case ARG_CRASH_SHELL:
873 r = optarg ? parse_boolean(optarg) : 1;
874 if (r < 0) {
875 log_error("Failed to parse crash shell boolean %s.", optarg);
876 return r;
877 }
878 arg_crash_shell = r;
879 break;
880
881 case ARG_CONFIRM_SPAWN:
882 r = optarg ? parse_boolean(optarg) : 1;
883 if (r < 0) {
884 log_error("Failed to parse confirm spawn boolean %s.", optarg);
885 return r;
886 }
887 arg_confirm_spawn = r;
888 break;
889
890 case ARG_SHOW_STATUS:
891 if (optarg) {
892 r = parse_show_status(optarg, &arg_show_status);
893 if (r < 0) {
894 log_error("Failed to parse show status boolean %s.", optarg);
895 return r;
896 }
897 } else
898 arg_show_status = SHOW_STATUS_YES;
899 break;
900
901 case ARG_DESERIALIZE: {
902 int fd;
903 FILE *f;
904
905 r = safe_atoi(optarg, &fd);
906 if (r < 0 || fd < 0) {
907 log_error("Failed to parse deserialize option %s.", optarg);
908 return r < 0 ? r : -EINVAL;
909 }
910
911 fd_cloexec(fd, true);
912
913 f = fdopen(fd, "r");
914 if (!f) {
915 log_error("Failed to open serialization fd: %m");
916 return -errno;
917 }
918
919 if (arg_serialization)
920 fclose(arg_serialization);
921
922 arg_serialization = f;
923
924 break;
925 }
926
927 case ARG_SWITCHED_ROOT:
928 arg_switched_root = true;
929 break;
930
931 case 'h':
932 arg_action = ACTION_HELP;
933 if (arg_no_pager < 0)
934 arg_no_pager = true;
935 break;
936
937 case 'D':
938 log_set_max_level(LOG_DEBUG);
939 break;
940
941 case 'b':
942 case 's':
943 case 'z':
944 /* Just to eat away the sysvinit kernel
945 * cmdline args without getopt() error
946 * messages that we'll parse in
947 * parse_proc_cmdline_word() or ignore. */
948
949 case '?':
950 default:
951 if (getpid() != 1) {
952 log_error("Unknown option code %c", c);
953 return -EINVAL;
954 }
955
956 break;
957 }
958
959 if (optind < argc && getpid() != 1) {
960 /* Hmm, when we aren't run as init system
961 * let's complain about excess arguments */
962
963 log_error("Excess arguments.");
964 return -EINVAL;
965 }
966
967 if (detect_container(NULL) > 0) {
968 char **a;
969
970 /* All /proc/cmdline arguments the kernel didn't
971 * understand it passed to us. We're not really
972 * interested in that usually since /proc/cmdline is
973 * more interesting and complete. With one exception:
974 * if we are run in a container /proc/cmdline is not
975 * relevant for the container, hence we rely on argv[]
976 * instead. */
977
978 for (a = argv; a < argv + argc; a++) {
979 _cleanup_free_ char *w;
980 char *value;
981
982 w = strdup(*a);
983 if (!w)
984 return log_oom();
985
986 value = strchr(w, '=');
987 if (value)
988 *(value++) = 0;
989
990 r = parse_proc_cmdline_item(w, value);
991 if (r < 0) {
992 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
993 return r;
994 }
995 }
996 }
997
998 return 0;
999 }
1000
1001 static int help(void) {
1002
1003 printf("%s [OPTIONS...]\n\n"
1004 "Starts up and maintains the system or user services.\n\n"
1005 " -h --help Show this help\n"
1006 " --test Determine startup sequence, dump it and exit\n"
1007 " --no-pager Do not pipe output into a pager\n"
1008 " --dump-configuration-items Dump understood unit configuration items\n"
1009 " --unit=UNIT Set default unit\n"
1010 " --system Run a system instance, even if PID != 1\n"
1011 " --user Run a user instance\n"
1012 " --dump-core[=0|1] Dump core on crash\n"
1013 " --crash-shell[=0|1] Run shell on crash\n"
1014 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1015 " --show-status[=0|1] Show status updates on the console during bootup\n"
1016 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1017 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1018 " --log-color[=0|1] Highlight important log messages\n"
1019 " --log-location[=0|1] Include code location in log messages\n"
1020 " --default-standard-output= Set default standard output for services\n"
1021 " --default-standard-error= Set default standard error output for services\n",
1022 program_invocation_short_name);
1023
1024 return 0;
1025 }
1026
1027 static int version(void) {
1028 puts(PACKAGE_STRING);
1029 puts(SYSTEMD_FEATURES);
1030
1031 return 0;
1032 }
1033
1034 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1035 FILE *f = NULL;
1036 FDSet *fds = NULL;
1037 int r;
1038
1039 assert(m);
1040 assert(_f);
1041 assert(_fds);
1042
1043 r = manager_open_serialization(m, &f);
1044 if (r < 0) {
1045 log_error("Failed to create serialization file: %s", strerror(-r));
1046 goto fail;
1047 }
1048
1049 /* Make sure nothing is really destructed when we shut down */
1050 m->n_reloading ++;
1051 bus_manager_send_reloading(m, true);
1052
1053 fds = fdset_new();
1054 if (!fds) {
1055 r = -ENOMEM;
1056 log_error("Failed to allocate fd set: %s", strerror(-r));
1057 goto fail;
1058 }
1059
1060 r = manager_serialize(m, f, fds, switching_root);
1061 if (r < 0) {
1062 log_error("Failed to serialize state: %s", strerror(-r));
1063 goto fail;
1064 }
1065
1066 if (fseeko(f, 0, SEEK_SET) < 0) {
1067 log_error("Failed to rewind serialization fd: %m");
1068 goto fail;
1069 }
1070
1071 r = fd_cloexec(fileno(f), false);
1072 if (r < 0) {
1073 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1074 goto fail;
1075 }
1076
1077 r = fdset_cloexec(fds, false);
1078 if (r < 0) {
1079 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1080 goto fail;
1081 }
1082
1083 *_f = f;
1084 *_fds = fds;
1085
1086 return 0;
1087
1088 fail:
1089 fdset_free(fds);
1090
1091 if (f)
1092 fclose(f);
1093
1094 return r;
1095 }
1096
1097 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1098 struct rlimit nl;
1099 int r;
1100
1101 assert(saved_rlimit);
1102
1103 /* Save the original RLIMIT_NOFILE so that we can reset it
1104 * later when transitioning from the initrd to the main
1105 * systemd or suchlike. */
1106 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1107 log_error("Reading RLIMIT_NOFILE failed: %m");
1108 return -errno;
1109 }
1110
1111 /* Make sure forked processes get the default kernel setting */
1112 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1113 struct rlimit *rl;
1114
1115 rl = newdup(struct rlimit, saved_rlimit, 1);
1116 if (!rl)
1117 return log_oom();
1118
1119 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1120 }
1121
1122 /* Bump up the resource limit for ourselves substantially */
1123 nl.rlim_cur = nl.rlim_max = 64*1024;
1124 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1125 if (r < 0) {
1126 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1127 return r;
1128 }
1129
1130 return 0;
1131 }
1132
1133 static void test_mtab(void) {
1134
1135 static const char ok[] =
1136 "/proc/self/mounts\0"
1137 "/proc/mounts\0"
1138 "../proc/self/mounts\0"
1139 "../proc/mounts\0";
1140
1141 _cleanup_free_ char *p = NULL;
1142 int r;
1143
1144 /* Check that /etc/mtab is a symlink to the right place or
1145 * non-existing. But certainly not a file, or a symlink to
1146 * some weird place... */
1147
1148 r = readlink_malloc("/etc/mtab", &p);
1149 if (r == -ENOENT)
1150 return;
1151 if (r >= 0 && nulstr_contains(ok, p))
1152 return;
1153
1154 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1155 "This is not supported anymore. "
1156 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1157 }
1158
1159 static void test_usr(void) {
1160
1161 /* Check that /usr is not a separate fs */
1162
1163 if (dir_is_empty("/usr") <= 0)
1164 return;
1165
1166 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1167 "Some things will probably break (sometimes even silently) in mysterious ways. "
1168 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1169 }
1170
1171 static int initialize_join_controllers(void) {
1172 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1173 * + "net_prio". We'd like to add "cpuset" to the mix, but
1174 * "cpuset" does't really work for groups with no initialized
1175 * attributes. */
1176
1177 arg_join_controllers = new(char**, 3);
1178 if (!arg_join_controllers)
1179 return -ENOMEM;
1180
1181 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1182 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1183 arg_join_controllers[2] = NULL;
1184
1185 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1186 free_join_controllers();
1187 return -ENOMEM;
1188 }
1189
1190 return 0;
1191 }
1192
1193 static int enforce_syscall_archs(Set *archs) {
1194 #ifdef HAVE_SECCOMP
1195 scmp_filter_ctx *seccomp;
1196 Iterator i;
1197 void *id;
1198 int r;
1199
1200 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1201 if (!seccomp)
1202 return log_oom();
1203
1204 SET_FOREACH(id, arg_syscall_archs, i) {
1205 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1206 if (r == -EEXIST)
1207 continue;
1208 if (r < 0) {
1209 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1210 goto finish;
1211 }
1212 }
1213
1214 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1215 if (r < 0) {
1216 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1217 goto finish;
1218 }
1219
1220 r = seccomp_load(seccomp);
1221 if (r < 0)
1222 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1223
1224 finish:
1225 seccomp_release(seccomp);
1226 return r;
1227 #else
1228 return 0;
1229 #endif
1230 }
1231
1232 static int status_welcome(void) {
1233 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1234 int r;
1235
1236 r = parse_env_file("/etc/os-release", NEWLINE,
1237 "PRETTY_NAME", &pretty_name,
1238 "ANSI_COLOR", &ansi_color,
1239 NULL);
1240 if (r == -ENOENT) {
1241 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1242 "PRETTY_NAME", &pretty_name,
1243 "ANSI_COLOR", &ansi_color,
1244 NULL);
1245 }
1246
1247 if (r < 0 && r != -ENOENT)
1248 log_warning("Failed to read os-release file: %s", strerror(-r));
1249
1250 return status_printf(NULL, false, false,
1251 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1252 isempty(ansi_color) ? "1" : ansi_color,
1253 isempty(pretty_name) ? "Linux" : pretty_name);
1254 }
1255
1256 static int write_container_id(void) {
1257 const char *c;
1258
1259 c = getenv("container");
1260 if (isempty(c))
1261 return 0;
1262
1263 return write_string_file("/run/systemd/container", c);
1264 }
1265
1266 int main(int argc, char *argv[]) {
1267 Manager *m = NULL;
1268 int r, retval = EXIT_FAILURE;
1269 usec_t before_startup, after_startup;
1270 char timespan[FORMAT_TIMESPAN_MAX];
1271 FDSet *fds = NULL;
1272 bool reexecute = false;
1273 const char *shutdown_verb = NULL;
1274 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1275 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1276 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1277 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1278 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1279 static char systemd[] = "systemd";
1280 bool skip_setup = false;
1281 unsigned j;
1282 bool loaded_policy = false;
1283 bool arm_reboot_watchdog = false;
1284 bool queue_default_job = false;
1285 bool empty_etc = false;
1286 char *switch_root_dir = NULL, *switch_root_init = NULL;
1287 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1288
1289 #ifdef HAVE_SYSV_COMPAT
1290 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1291 /* This is compatibility support for SysV, where
1292 * calling init as a user is identical to telinit. */
1293
1294 errno = -ENOENT;
1295 execv(SYSTEMCTL_BINARY_PATH, argv);
1296 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1297 return 1;
1298 }
1299 #endif
1300
1301 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1302 dual_timestamp_get(&userspace_timestamp);
1303
1304 /* Determine if this is a reexecution or normal bootup. We do
1305 * the full command line parsing much later, so let's just
1306 * have a quick peek here. */
1307 if (strv_find(argv+1, "--deserialize"))
1308 skip_setup = true;
1309
1310 /* If we have switched root, do all the special setup
1311 * things */
1312 if (strv_find(argv+1, "--switched-root"))
1313 skip_setup = false;
1314
1315 /* If we get started via the /sbin/init symlink then we are
1316 called 'init'. After a subsequent reexecution we are then
1317 called 'systemd'. That is confusing, hence let's call us
1318 systemd right-away. */
1319 program_invocation_short_name = systemd;
1320 prctl(PR_SET_NAME, systemd);
1321
1322 saved_argv = argv;
1323 saved_argc = argc;
1324
1325 log_show_color(isatty(STDERR_FILENO) > 0);
1326
1327 /* Disable the umask logic */
1328 if (getpid() == 1)
1329 umask(0);
1330
1331 if (getpid() == 1 && detect_container(NULL) <= 0) {
1332
1333 /* Running outside of a container as PID 1 */
1334 arg_running_as = SYSTEMD_SYSTEM;
1335 make_null_stdio();
1336 log_set_target(LOG_TARGET_KMSG);
1337 log_open();
1338
1339 if (in_initrd())
1340 initrd_timestamp = userspace_timestamp;
1341
1342 if (!skip_setup) {
1343 mount_setup_early();
1344 dual_timestamp_get(&security_start_timestamp);
1345 if (selinux_setup(&loaded_policy) < 0)
1346 goto finish;
1347 if (ima_setup() < 0)
1348 goto finish;
1349 if (smack_setup(&loaded_policy) < 0)
1350 goto finish;
1351 dual_timestamp_get(&security_finish_timestamp);
1352 }
1353
1354 if (label_init(NULL) < 0)
1355 goto finish;
1356
1357 if (!skip_setup) {
1358 if (clock_is_localtime() > 0) {
1359 int min;
1360
1361 /*
1362 * The very first call of settimeofday() also does a time warp in the kernel.
1363 *
1364 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1365 * external tools to take care of maintaining the RTC and do all adjustments.
1366 * This matches the behavior of Windows, which leaves the RTC alone if the
1367 * registry tells that the RTC runs in UTC.
1368 */
1369 r = clock_set_timezone(&min);
1370 if (r < 0)
1371 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1372 else
1373 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1374 } else if (!in_initrd()) {
1375 /*
1376 * Do a dummy very first call to seal the kernel's time warp magic.
1377 *
1378 * Do not call this this from inside the initrd. The initrd might not
1379 * carry /etc/adjtime with LOCAL, but the real system could be set up
1380 * that way. In such case, we need to delay the time-warp or the sealing
1381 * until we reach the real system.
1382 *
1383 * Do no set the kernel's timezone. The concept of local time cannot
1384 * be supported reliably, the time will jump or be incorrect at every daylight
1385 * saving time change. All kernel local time concepts will be treated
1386 * as UTC that way.
1387 */
1388 clock_reset_timewarp();
1389 }
1390 }
1391
1392 /* Set the default for later on, but don't actually
1393 * open the logs like this for now. Note that if we
1394 * are transitioning from the initrd there might still
1395 * be journal fd open, and we shouldn't attempt
1396 * opening that before we parsed /proc/cmdline which
1397 * might redirect output elsewhere. */
1398 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1399
1400 } else if (getpid() == 1) {
1401 /* Running inside a container, as PID 1 */
1402 arg_running_as = SYSTEMD_SYSTEM;
1403 log_set_target(LOG_TARGET_CONSOLE);
1404 log_close_console(); /* force reopen of /dev/console */
1405 log_open();
1406
1407 /* For the later on, see above... */
1408 log_set_target(LOG_TARGET_JOURNAL);
1409
1410 /* clear the kernel timestamp,
1411 * because we are in a container */
1412 kernel_timestamp.monotonic = 0ULL;
1413 kernel_timestamp.realtime = 0ULL;
1414
1415 } else {
1416 /* Running as user instance */
1417 arg_running_as = SYSTEMD_USER;
1418 log_set_target(LOG_TARGET_AUTO);
1419 log_open();
1420
1421 /* clear the kernel timestamp,
1422 * because we are not PID 1 */
1423 kernel_timestamp.monotonic = 0ULL;
1424 kernel_timestamp.realtime = 0ULL;
1425 }
1426
1427 /* Initialize default unit */
1428 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1429 if (r < 0) {
1430 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1431 goto finish;
1432 }
1433
1434 r = initialize_join_controllers();
1435 if (r < 0)
1436 goto finish;
1437
1438 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1439 * /proc/$PID/fd is available. */
1440 if (getpid() == 1) {
1441 r = mount_setup(loaded_policy);
1442 if (r < 0)
1443 goto finish;
1444 }
1445
1446 /* Reset all signal handlers. */
1447 assert_se(reset_all_signal_handlers() == 0);
1448
1449 ignore_signals(SIGNALS_IGNORE, -1);
1450
1451 if (parse_config_file() < 0)
1452 goto finish;
1453
1454 if (arg_running_as == SYSTEMD_SYSTEM)
1455 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1456 goto finish;
1457
1458 log_parse_environment();
1459
1460 if (parse_argv(argc, argv) < 0)
1461 goto finish;
1462
1463 if (arg_action == ACTION_TEST &&
1464 geteuid() == 0) {
1465 log_error("Don't run test mode as root.");
1466 goto finish;
1467 }
1468
1469 if (arg_running_as == SYSTEMD_USER &&
1470 arg_action == ACTION_RUN &&
1471 sd_booted() <= 0) {
1472 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1473 goto finish;
1474 }
1475
1476 if (arg_running_as == SYSTEMD_SYSTEM &&
1477 arg_action == ACTION_RUN &&
1478 running_in_chroot() > 0) {
1479 log_error("Cannot be run in a chroot() environment.");
1480 goto finish;
1481 }
1482
1483 if (arg_action == ACTION_TEST)
1484 skip_setup = true;
1485
1486 pager_open_if_enabled();
1487
1488 if (arg_action == ACTION_HELP) {
1489 retval = help();
1490 goto finish;
1491 } else if (arg_action == ACTION_VERSION) {
1492 retval = version();
1493 goto finish;
1494 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1495 unit_dump_config_items(stdout);
1496 retval = EXIT_SUCCESS;
1497 goto finish;
1498 } else if (arg_action == ACTION_DONE) {
1499 retval = EXIT_SUCCESS;
1500 goto finish;
1501 }
1502
1503 if (arg_running_as == SYSTEMD_USER &&
1504 !getenv("XDG_RUNTIME_DIR")) {
1505 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1506 goto finish;
1507 }
1508
1509 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1510
1511 /* Close logging fds, in order not to confuse fdset below */
1512 log_close();
1513
1514 /* Remember open file descriptors for later deserialization */
1515 r = fdset_new_fill(&fds);
1516 if (r < 0) {
1517 log_error("Failed to allocate fd set: %s", strerror(-r));
1518 goto finish;
1519 } else
1520 fdset_cloexec(fds, true);
1521
1522 if (arg_serialization)
1523 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1524
1525 if (arg_running_as == SYSTEMD_SYSTEM)
1526 /* Become a session leader if we aren't one yet. */
1527 setsid();
1528
1529 /* Move out of the way, so that we won't block unmounts */
1530 assert_se(chdir("/") == 0);
1531
1532 /* Reset the console, but only if this is really init and we
1533 * are freshly booted */
1534 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1535 console_setup(getpid() == 1 && !skip_setup);
1536
1537 /* Open the logging devices, if possible and necessary */
1538 log_open();
1539
1540 if (arg_show_status == _SHOW_STATUS_UNSET)
1541 arg_show_status = SHOW_STATUS_YES;
1542
1543 /* Make sure we leave a core dump without panicing the
1544 * kernel. */
1545 if (getpid() == 1) {
1546 install_crash_handler();
1547
1548 r = mount_cgroup_controllers(arg_join_controllers);
1549 if (r < 0)
1550 goto finish;
1551 }
1552
1553 if (arg_running_as == SYSTEMD_SYSTEM) {
1554 const char *virtualization = NULL;
1555
1556 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1557 arg_action == ACTION_TEST ? "test " : "" );
1558
1559 detect_virtualization(&virtualization);
1560 if (virtualization)
1561 log_info("Detected virtualization '%s'.", virtualization);
1562
1563 write_container_id();
1564
1565 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1566
1567 if (in_initrd())
1568 log_info("Running in initial RAM disk.");
1569
1570 /* Let's check whether /etc is already populated. We
1571 * don't actually really check for that, but use
1572 * /etc/machine-id as flag file. This allows container
1573 * managers and installers to provision a couple of
1574 * files already. If the container manager wants to
1575 * provision the machine ID itself it should pass
1576 * $container_uuid to PID 1.*/
1577
1578 empty_etc = access("/etc/machine-id", F_OK) < 0;
1579 if (empty_etc)
1580 log_info("Running with unpopulated /etc.");
1581 } else {
1582 _cleanup_free_ char *t;
1583
1584 t = uid_to_name(getuid());
1585 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1586 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1587 }
1588
1589 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1590 if (arg_show_status > 0 || plymouth_running())
1591 status_welcome();
1592
1593 #ifdef HAVE_KMOD
1594 kmod_setup();
1595 #endif
1596 hostname_setup();
1597 machine_id_setup(NULL);
1598 loopback_setup();
1599
1600 test_mtab();
1601 test_usr();
1602 }
1603
1604 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1605 watchdog_set_timeout(&arg_runtime_watchdog);
1606
1607 if (arg_timer_slack_nsec != (nsec_t) -1)
1608 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1609 log_error("Failed to adjust timer slack: %m");
1610
1611 if (arg_capability_bounding_set_drop) {
1612 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1613 if (r < 0) {
1614 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1615 goto finish;
1616 }
1617 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1618 if (r < 0) {
1619 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1620 goto finish;
1621 }
1622 }
1623
1624 if (arg_syscall_archs) {
1625 r = enforce_syscall_archs(arg_syscall_archs);
1626 if (r < 0)
1627 goto finish;
1628 }
1629
1630 if (arg_running_as == SYSTEMD_USER) {
1631 /* Become reaper of our children */
1632 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1633 log_warning("Failed to make us a subreaper: %m");
1634 if (errno == EINVAL)
1635 log_info("Perhaps the kernel version is too old (< 3.4?)");
1636 }
1637 }
1638
1639 if (arg_running_as == SYSTEMD_SYSTEM) {
1640 bump_rlimit_nofile(&saved_rlimit_nofile);
1641
1642 if (empty_etc) {
1643 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
1644 if (r < 0)
1645 log_warning("Failed to populate /etc with preset unit settings, ignoring: %s", strerror(-r));
1646 else
1647 log_info("Populated /etc with preset unit settings.");
1648 }
1649 }
1650
1651 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1652 if (r < 0) {
1653 log_error("Failed to allocate manager object: %s", strerror(-r));
1654 goto finish;
1655 }
1656
1657 m->confirm_spawn = arg_confirm_spawn;
1658 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1659 m->default_std_output = arg_default_std_output;
1660 m->default_std_error = arg_default_std_error;
1661 m->default_restart_usec = arg_default_restart_usec;
1662 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1663 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1664 m->default_start_limit_interval = arg_default_start_limit_interval;
1665 m->default_start_limit_burst = arg_default_start_limit_burst;
1666 m->default_cpu_accounting = arg_default_cpu_accounting;
1667 m->default_blockio_accounting = arg_default_blockio_accounting;
1668 m->default_memory_accounting = arg_default_memory_accounting;
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_default_rlimits(m, arg_default_rlimit);
1678 manager_environment_add(m, NULL, arg_default_environment);
1679 manager_set_show_status(m, arg_show_status);
1680 manager_set_first_boot(m, empty_etc);
1681
1682 /* Remember whether we should queue the default job */
1683 queue_default_job = !arg_serialization || arg_switched_root;
1684
1685 before_startup = now(CLOCK_MONOTONIC);
1686
1687 r = manager_startup(m, arg_serialization, fds);
1688 if (r < 0)
1689 log_error("Failed to fully start up daemon: %s", strerror(-r));
1690
1691 /* This will close all file descriptors that were opened, but
1692 * not claimed by any unit. */
1693 fdset_free(fds);
1694 fds = NULL;
1695
1696 if (arg_serialization) {
1697 fclose(arg_serialization);
1698 arg_serialization = NULL;
1699 }
1700
1701 if (queue_default_job) {
1702 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1703 Unit *target = NULL;
1704 Job *default_unit_job;
1705
1706 log_debug("Activating default unit: %s", arg_default_unit);
1707
1708 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1709 if (r < 0)
1710 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1711 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1712 log_error("Failed to load default target: %s", strerror(-target->load_error));
1713 else if (target->load_state == UNIT_MASKED)
1714 log_error("Default target masked.");
1715
1716 if (!target || target->load_state != UNIT_LOADED) {
1717 log_info("Trying to load rescue target...");
1718
1719 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1720 if (r < 0) {
1721 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1722 goto finish;
1723 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1724 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1725 goto finish;
1726 } else if (target->load_state == UNIT_MASKED) {
1727 log_error("Rescue target masked.");
1728 goto finish;
1729 }
1730 }
1731
1732 assert(target->load_state == UNIT_LOADED);
1733
1734 if (arg_action == ACTION_TEST) {
1735 printf("-> By units:\n");
1736 manager_dump_units(m, stdout, "\t");
1737 }
1738
1739 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1740 if (r == -EPERM) {
1741 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1742
1743 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1744 if (r < 0) {
1745 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1746 goto finish;
1747 }
1748 } else if (r < 0) {
1749 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
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, 0));
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_error("Failed to run mainloop: %s", strerror(-r));
1772 goto finish;
1773 }
1774
1775 switch (m->exit_code) {
1776
1777 case MANAGER_EXIT:
1778 retval = EXIT_SUCCESS;
1779 log_debug("Exit.");
1780 goto finish;
1781
1782 case MANAGER_RELOAD:
1783 log_info("Reloading.");
1784 r = manager_reload(m);
1785 if (r < 0)
1786 log_error("Failed to reload: %s", strerror(-r));
1787 break;
1788
1789 case MANAGER_REEXECUTE:
1790
1791 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1792 goto finish;
1793
1794 reexecute = true;
1795 log_notice("Reexecuting.");
1796 goto finish;
1797
1798 case MANAGER_SWITCH_ROOT:
1799 /* Steal the switch root parameters */
1800 switch_root_dir = m->switch_root;
1801 switch_root_init = m->switch_root_init;
1802 m->switch_root = m->switch_root_init = NULL;
1803
1804 if (!switch_root_init)
1805 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1806 goto finish;
1807
1808 reexecute = true;
1809 log_notice("Switching root.");
1810 goto finish;
1811
1812 case MANAGER_REBOOT:
1813 case MANAGER_POWEROFF:
1814 case MANAGER_HALT:
1815 case MANAGER_KEXEC: {
1816 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1817 [MANAGER_REBOOT] = "reboot",
1818 [MANAGER_POWEROFF] = "poweroff",
1819 [MANAGER_HALT] = "halt",
1820 [MANAGER_KEXEC] = "kexec"
1821 };
1822
1823 assert_se(shutdown_verb = table[m->exit_code]);
1824 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1825
1826 log_notice("Shutting down.");
1827 goto finish;
1828 }
1829
1830 default:
1831 assert_not_reached("Unknown exit code.");
1832 }
1833 }
1834
1835 finish:
1836 pager_close();
1837
1838 if (m) {
1839 manager_free(m);
1840 m = NULL;
1841 }
1842
1843 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1844 free(arg_default_rlimit[j]);
1845 arg_default_rlimit[j] = NULL;
1846 }
1847
1848 free(arg_default_unit);
1849 arg_default_unit = NULL;
1850
1851 free_join_controllers();
1852
1853 strv_free(arg_default_environment);
1854 arg_default_environment = NULL;
1855
1856 set_free(arg_syscall_archs);
1857 arg_syscall_archs = NULL;
1858
1859 label_finish();
1860
1861 if (reexecute) {
1862 const char **args;
1863 unsigned i, args_size;
1864 sigset_t ss;
1865
1866 /* Close and disarm the watchdog, so that the new
1867 * instance can reinitialize it, but doesn't get
1868 * rebooted while we do that */
1869 watchdog_close(true);
1870
1871 /* Reset the RLIMIT_NOFILE to the kernel default, so
1872 * that the new systemd can pass the kernel default to
1873 * its child processes */
1874 if (saved_rlimit_nofile.rlim_cur > 0)
1875 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1876
1877 if (switch_root_dir) {
1878 /* Kill all remaining processes from the
1879 * initrd, but don't wait for them, so that we
1880 * can handle the SIGCHLD for them after
1881 * deserializing. */
1882 broadcast_signal(SIGTERM, false, true);
1883
1884 /* And switch root */
1885 r = switch_root(switch_root_dir);
1886 if (r < 0)
1887 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1888 }
1889
1890 args_size = MAX(6, argc+1);
1891 args = newa(const char*, args_size);
1892
1893 if (!switch_root_init) {
1894 char sfd[16];
1895
1896 /* First try to spawn ourselves with the right
1897 * path, and with full serialization. We do
1898 * this only if the user didn't specify an
1899 * explicit init to spawn. */
1900
1901 assert(arg_serialization);
1902 assert(fds);
1903
1904 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1905 char_array_0(sfd);
1906
1907 i = 0;
1908 args[i++] = SYSTEMD_BINARY_PATH;
1909 if (switch_root_dir)
1910 args[i++] = "--switched-root";
1911 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1912 args[i++] = "--deserialize";
1913 args[i++] = sfd;
1914 args[i++] = NULL;
1915
1916 /* do not pass along the environment we inherit from the kernel or initrd */
1917 if (switch_root_dir)
1918 clearenv();
1919
1920 assert(i <= args_size);
1921 execv(args[0], (char* const*) args);
1922 }
1923
1924 /* Try the fallback, if there is any, without any
1925 * serialization. We pass the original argv[] and
1926 * envp[]. (Well, modulo the ordering changes due to
1927 * getopt() in argv[], and some cleanups in envp[],
1928 * but let's hope that doesn't matter.) */
1929
1930 if (arg_serialization) {
1931 fclose(arg_serialization);
1932 arg_serialization = NULL;
1933 }
1934
1935 if (fds) {
1936 fdset_free(fds);
1937 fds = NULL;
1938 }
1939
1940 /* Reopen the console */
1941 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 reset_all_signal_handlers();
1951
1952 assert_se(sigemptyset(&ss) == 0);
1953 assert_se(sigprocmask(SIG_SETMASK, &ss, NULL) == 0);
1954
1955 if (switch_root_init) {
1956 args[0] = switch_root_init;
1957 execv(args[0], (char* const*) args);
1958 log_warning("Failed to execute configured init, trying fallback: %m");
1959 }
1960
1961 args[0] = "/sbin/init";
1962 execv(args[0], (char* const*) args);
1963
1964 if (errno == ENOENT) {
1965 log_warning("No /sbin/init, trying fallback");
1966
1967 args[0] = "/bin/sh";
1968 args[1] = NULL;
1969 execv(args[0], (char* const*) args);
1970 log_error("Failed to execute /bin/sh, giving up: %m");
1971 } else
1972 log_warning("Failed to execute /sbin/init, giving up: %m");
1973 }
1974
1975 if (arg_serialization) {
1976 fclose(arg_serialization);
1977 arg_serialization = NULL;
1978 }
1979
1980 if (fds) {
1981 fdset_free(fds);
1982 fds = NULL;
1983 }
1984
1985 #ifdef HAVE_VALGRIND_VALGRIND_H
1986 /* If we are PID 1 and running under valgrind, then let's exit
1987 * here explicitly. valgrind will only generate nice output on
1988 * exit(), not on exec(), hence let's do the former not the
1989 * latter here. */
1990 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1991 return 0;
1992 #endif
1993
1994 if (shutdown_verb) {
1995 char log_level[DECIMAL_STR_MAX(int) + 1];
1996 const char* command_line[9] = {
1997 SYSTEMD_SHUTDOWN_BINARY_PATH,
1998 shutdown_verb,
1999 "--log-level", log_level,
2000 "--log-target",
2001 };
2002 unsigned pos = 5;
2003 _cleanup_strv_free_ char **env_block = NULL;
2004
2005 assert(command_line[pos] == NULL);
2006 env_block = strv_copy(environ);
2007
2008 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
2009
2010 switch (log_get_target()) {
2011 case LOG_TARGET_KMSG:
2012 case LOG_TARGET_JOURNAL_OR_KMSG:
2013 case LOG_TARGET_SYSLOG_OR_KMSG:
2014 command_line[pos++] = "kmsg";
2015 break;
2016
2017 case LOG_TARGET_CONSOLE:
2018 default:
2019 command_line[pos++] = "console";
2020 break;
2021 };
2022
2023 if (log_get_show_color())
2024 command_line[pos++] = "--log-color";
2025
2026 if (log_get_show_location())
2027 command_line[pos++] = "--log-location";
2028
2029 assert(pos < ELEMENTSOF(command_line));
2030
2031 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2032 char *e;
2033
2034 /* If we reboot let's set the shutdown
2035 * watchdog and tell the shutdown binary to
2036 * repeatedly ping it */
2037 watchdog_set_timeout(&arg_shutdown_watchdog);
2038 watchdog_close(false);
2039
2040 /* Tell the binary how often to ping, ignore failure */
2041 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2042 strv_push(&env_block, e);
2043 } else
2044 watchdog_close(true);
2045
2046 /* Avoid the creation of new processes forked by the
2047 * kernel; at this point, we will not listen to the
2048 * signals anyway */
2049 if (detect_container(NULL) <= 0)
2050 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2051
2052 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2053 log_error("Failed to execute shutdown binary, %s: %m",
2054 getpid() == 1 ? "freezing" : "quitting");
2055 }
2056
2057 if (getpid() == 1)
2058 freeze();
2059
2060 return retval;
2061 }
Unnamed repository; edit this file 'description' to name the repository.