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d6c9574f 1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
60918275 2
a7334b09
LP		 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
5430f7f2
LP		 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
a7334b09
LP		 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
5430f7f2 16 Lesser General Public License for more details.
a7334b09 17
5430f7f2 18 You should have received a copy of the GNU Lesser General Public License
a7334b09
LP		 19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
ea430986
LP		 22#include <dbus/dbus.h>
23
60918275
LP		 24#include <stdio.h>
25#include <errno.h>
26#include <string.h>
16354eff 27#include <unistd.h>
4ade7963
LP		 28#include <sys/types.h>
29#include <sys/stat.h>
f170852a 30#include <getopt.h>
97c4f35c 31#include <signal.h>
4fc935ca 32#include <sys/wait.h>
80876c20 33#include <fcntl.h>
f3b6a3ed 34#include <sys/prctl.h>
664f88a7 35#include <sys/mount.h>
60918275
LP		 36
37#include "manager.h"
16354eff 38#include "log.h"
302e8c4c 39#include "load-fragment.h"
a16e1123 40#include "fdset.h"
514f4ef5 41#include "special.h"
487393e9 42#include "conf-parser.h"
449101fc 43#include "dbus-common.h"
ad780f19 44#include "missing.h"
e51bc1a2 45#include "label.h"
302e27c8 46#include "build.h"
06d4c99a 47#include "strv.h"
f6a6225e 48#include "def.h"
b52aae1d 49#include "virt.h"
e96d6be7 50#include "watchdog.h"
664f88a7 51#include "path-util.h"
41669317 52#include "switch-root.h"
ec8927ca 53#include "capability.h"
bd3fa1d2 54#include "killall.h"
0c4025d1
LP		 55#include "env-util.h"
56#include "hwclock.h"
57#include "sd-daemon.h"
e8e581bf 58#include "sd-messages.h"
60918275 59
b6e66135
LP		 60#include "mount-setup.h"
61#include "loopback-setup.h"
e3043162 62#ifdef HAVE_KMOD
b6e66135 63#include "kmod-setup.h"
e3043162 64#endif
b6e66135
LP		 65#include "hostname-setup.h"
66#include "machine-id-setup.h"
67#include "locale-setup.h"
68#include "selinux-setup.h"
69#include "ima-setup.h"
a5c32cff 70#include "fileio.h"
ffbd2c4d 71#include "smack-setup.h"
b6e66135 72
f170852a
LP		 73static enum {
74 ACTION_RUN,
e965d56d 75 ACTION_HELP,
9ba0bc4e 76 ACTION_VERSION,
e537352b 77 ACTION_TEST,
4288f619
LP		 78 ACTION_DUMP_CONFIGURATION_ITEMS,
79 ACTION_DONE
fa0f4d8a 80} arg_action = ACTION_RUN;
f170852a 81
fa0f4d8a 82static char *arg_default_unit = NULL;
67445f4e 83static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
fa0f4d8a
LP		 84
85static bool arg_dump_core = true;
86static bool arg_crash_shell = false;
87static int arg_crash_chvt = -1;
88static bool arg_confirm_spawn = false;
9e58ff9c 89static bool arg_show_status = true;
bf4df7c3 90static bool arg_switched_root = false;
0c85a4f3 91static char ***arg_join_controllers = NULL;
706343f4 92static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
0a494f1f 93static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
e96d6be7
LP		 94static usec_t arg_runtime_watchdog = 0;
95static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
97d0e5f8 96static char **arg_default_environment = NULL;
c93ff2e9 97static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
ec8927ca 98static uint64_t arg_capability_bounding_set_drop = 0;
aa0f64ac 99static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
4fc935ca 100
a16e1123 101static FILE* serialization = NULL;
80876c20 102
6f5e3f35
LP		 103static void nop_handler(int sig) {
104}
105
93a46b0b 106_noreturn_ static void crash(int sig) {
97c4f35c 107
abb26902
LP		 108 if (getpid() != 1)
109 /* Pass this on immediately, if this is not PID 1 */
110 raise(sig);
111 else if (!arg_dump_core)
582a507f 112 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
97c4f35c 113 else {
b92bea5d
ZJS		 114 struct sigaction sa = {
115 .sa_handler = nop_handler,
116 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
117 };
97c4f35c
LP		 118 pid_t pid;
119
6f5e3f35 120 /* We want to wait for the core process, hence let's enable SIGCHLD */
abb26902 121 sigaction(SIGCHLD, &sa, NULL);
6f5e3f35 122
e62d8c39
ZJS		 123 pid = fork();
124 if (pid < 0)
7989e1f2 125 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
97c4f35c
LP		 126
127 else if (pid == 0) {
b92bea5d 128 struct rlimit rl = {};
97c4f35c
LP		 129
130 /* Enable default signal handler for core dump */
131 zero(sa);
132 sa.sa_handler = SIG_DFL;
abb26902 133 sigaction(sig, &sa, NULL);
97c4f35c
LP		 134
135 /* Don't limit the core dump size */
97c4f35c
LP		 136 rl.rlim_cur = RLIM_INFINITY;
137 rl.rlim_max = RLIM_INFINITY;
138 setrlimit(RLIMIT_CORE, &rl);
139
140 /* Just to be sure... */
abb26902 141 chdir("/");
97c4f35c
LP		 142
143 /* Raise the signal again */
144 raise(sig);
145
146 assert_not_reached("We shouldn't be here...");
147 _exit(1);
4fc935ca
LP		 148
149 } else {
8e12a6ae
LP		 150 siginfo_t status;
151 int r;
4fc935ca
LP		 152
153 /* Order things nicely. */
e62d8c39
ZJS		 154 r = wait_for_terminate(pid, &status);
155 if (r < 0)
7989e1f2 156 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
8e12a6ae 157 else if (status.si_code != CLD_DUMPED)
7989e1f2 158 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
4fc935ca 159 else
7989e1f2 160 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
97c4f35c
LP		 161 }
162 }
163
fa0f4d8a
LP		 164 if (arg_crash_chvt)
165 chvt(arg_crash_chvt);
601f6a1e 166
fa0f4d8a 167 if (arg_crash_shell) {
b92bea5d
ZJS		 168 struct sigaction sa = {
169 .sa_handler = SIG_IGN,
170 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
171 };
6f5e3f35 172 pid_t pid;
8c43883a 173
4fc935ca
LP		 174 log_info("Executing crash shell in 10s...");
175 sleep(10);
176
6f5e3f35 177 /* Let the kernel reap children for us */
6f5e3f35 178 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
8c43883a 179
cd3bd60a
LP		 180 pid = fork();
181 if (pid < 0)
14212119 182 log_error("Failed to fork off crash shell: %m");
6f5e3f35 183 else if (pid == 0) {
cd3bd60a 184 make_console_stdio();
6f5e3f35
LP		 185 execl("/bin/sh", "/bin/sh", NULL);
186
14212119 187 log_error("execl() failed: %m");
6f5e3f35
LP		 188 _exit(1);
189 }
c99b188e 190
7989e1f2 191 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
4fc935ca
LP		 192 }
193
194 log_info("Freezing execution.");
97c4f35c
LP		 195 freeze();
196}
197
198static void install_crash_handler(void) {
b92bea5d
ZJS		 199 struct sigaction sa = {
200 .sa_handler = crash,
201 .sa_flags = SA_NODEFER,
202 };
97c4f35c 203
1b91d3e8 204 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
97c4f35c 205}
f170852a 206
843d2643
LP		 207static int console_setup(bool do_reset) {
208 int tty_fd, r;
80876c20 209
843d2643
LP		 210 /* If we are init, we connect stdin/stdout/stderr to /dev/null
211 * and make sure we don't have a controlling tty. */
80876c20 212
843d2643
LP		 213 release_terminal();
214
215 if (!do_reset)
216 return 0;
80876c20 217
512947d4
MS		 218 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
219 if (tty_fd < 0) {
843d2643
LP		 220 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
221 return -tty_fd;
222 }
80876c20 223
512947d4
MS		 224 /* We don't want to force text mode.
225 * plymouth may be showing pictures already from initrd. */
226 r = reset_terminal_fd(tty_fd, false);
227 if (r < 0)
843d2643
LP		 228 log_error("Failed to reset /dev/console: %s", strerror(-r));
229
230 close_nointr_nofail(tty_fd);
80876c20
LP		 231 return r;
232}
233
f170852a
LP		 234static int set_default_unit(const char *u) {
235 char *c;
236
237 assert(u);
238
bf4df7c3
LP		 239 c = strdup(u);
240 if (!c)
f170852a
LP		 241 return -ENOMEM;
242
fa0f4d8a
LP		 243 free(arg_default_unit);
244 arg_default_unit = c;
bf4df7c3 245
f170852a
LP		 246 return 0;
247}
248
249static int parse_proc_cmdline_word(const char *word) {
250
251 static const char * const rlmap[] = {
ed370f5d 252 "emergency", SPECIAL_EMERGENCY_TARGET,
099663ff 253 "-b", SPECIAL_EMERGENCY_TARGET,
ed370f5d
LP		 254 "single", SPECIAL_RESCUE_TARGET,
255 "-s", SPECIAL_RESCUE_TARGET,
256 "s", SPECIAL_RESCUE_TARGET,
257 "S", SPECIAL_RESCUE_TARGET,
258 "1", SPECIAL_RESCUE_TARGET,
259 "2", SPECIAL_RUNLEVEL2_TARGET,
260 "3", SPECIAL_RUNLEVEL3_TARGET,
261 "4", SPECIAL_RUNLEVEL4_TARGET,
262 "5", SPECIAL_RUNLEVEL5_TARGET,
f170852a
LP		 263 };
264
5192bd19
LP		 265 assert(word);
266
bf4df7c3
LP		 267 if (startswith(word, "systemd.unit=")) {
268
269 if (!in_initrd())
270 return set_default_unit(word + 13);
271
272 } else if (startswith(word, "rd.systemd.unit=")) {
273
274 if (in_initrd())
275 return set_default_unit(word + 16);
f170852a 276
bf4df7c3 277 } else if (startswith(word, "systemd.log_target=")) {
f170852a
LP		 278
279 if (log_set_target_from_string(word + 19) < 0)
280 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
281
282 } else if (startswith(word, "systemd.log_level=")) {
283
284 if (log_set_max_level_from_string(word + 18) < 0)
285 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
286
bbe63281
LP		 287 } else if (startswith(word, "systemd.log_color=")) {
288
289 if (log_show_color_from_string(word + 18) < 0)
290 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
291
292 } else if (startswith(word, "systemd.log_location=")) {
293
294 if (log_show_location_from_string(word + 21) < 0)
295 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
296
4fc935ca
LP		 297 } else if (startswith(word, "systemd.dump_core=")) {
298 int r;
299
300 if ((r = parse_boolean(word + 18)) < 0)
509b6efb 301 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
4fc935ca 302 else
fa0f4d8a 303 arg_dump_core = r;
4fc935ca
LP		 304
305 } else if (startswith(word, "systemd.crash_shell=")) {
306 int r;
307
308 if ((r = parse_boolean(word + 20)) < 0)
509b6efb 309 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
4fc935ca 310 else
fa0f4d8a 311 arg_crash_shell = r;
5e7ee61c
LP		 312
313 } else if (startswith(word, "systemd.confirm_spawn=")) {
314 int r;
315
316 if ((r = parse_boolean(word + 22)) < 0)
509b6efb 317 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
5e7ee61c 318 else
fa0f4d8a 319 arg_confirm_spawn = r;
5e7ee61c 320
601f6a1e
LP		 321 } else if (startswith(word, "systemd.crash_chvt=")) {
322 int k;
323
324 if (safe_atoi(word + 19, &k) < 0)
509b6efb 325 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
601f6a1e 326 else
fa0f4d8a 327 arg_crash_chvt = k;
601f6a1e 328
9e58ff9c
LP		 329 } else if (startswith(word, "systemd.show_status=")) {
330 int r;
331
332 if ((r = parse_boolean(word + 20)) < 0)
509b6efb 333 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
6e98720f 334 else
9e58ff9c 335 arg_show_status = r;
0a494f1f
LP		 336 } else if (startswith(word, "systemd.default_standard_output=")) {
337 int r;
338
339 if ((r = exec_output_from_string(word + 32)) < 0)
509b6efb 340 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
0a494f1f
LP		 341 else
342 arg_default_std_output = r;
343 } else if (startswith(word, "systemd.default_standard_error=")) {
344 int r;
345
346 if ((r = exec_output_from_string(word + 31)) < 0)
509b6efb 347 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
0a494f1f
LP		 348 else
349 arg_default_std_error = r;
9e7c5357 350 } else if (startswith(word, "systemd.setenv=")) {
0c4025d1
LP		 351 _cleanup_free_ char *cenv = NULL;
352 char *eq;
9e7c5357
WD		 353 int r;
354
355 cenv = strdup(word + 15);
356 if (!cenv)
357 return -ENOMEM;
358
359 eq = strchr(cenv, '=');
360 if (!eq) {
0c4025d1
LP		 361 if (!env_name_is_valid(cenv))
362 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
363 else {
364 r = unsetenv(cenv);
365 if (r < 0)
366 log_warning("Unsetting environment variable '%s' failed, ignoring: %m", cenv);
367 }
9e7c5357 368 } else {
0c4025d1
LP		 369 if (!env_assignment_is_valid(cenv))
370 log_warning("Environment variable assignment '%s' is not valid. Ignoring.", cenv);
371 else {
372 *eq = 0;
373 r = setenv(cenv, eq + 1, 1);
374 if (r < 0)
375 log_warning("Setting environment variable '%s=%s' failed, ignoring: %m", cenv, eq + 1);
376 }
9e7c5357 377 }
9e58ff9c 378
66a78c2b
LP		 379 } else if (startswith(word, "systemd.") ||
380 (in_initrd() && startswith(word, "rd.systemd."))) {
4fc935ca 381
dd7c30c3
LP		 382 const char *c;
383
384 /* Ignore systemd.journald.xyz and friends */
385 c = word;
386 if (startswith(c, "rd."))
387 c += 3;
388 if (startswith(c, "systemd."))
389 c += 8;
390 if (c[strcspn(c, ".=")] != '.') {
391
392 log_warning("Unknown kernel switch %s. Ignoring.", word);
393
394 log_info("Supported kernel switches:\n"
395 "systemd.unit=UNIT Default unit to start\n"
396 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
397 "systemd.dump_core=0|1 Dump core on crash\n"
398 "systemd.crash_shell=0|1 Run shell on crash\n"
399 "systemd.crash_chvt=N Change to VT #N on crash\n"
400 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
401 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
402 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
403 " Log target\n"
404 "systemd.log_level=LEVEL Log level\n"
405 "systemd.log_color=0|1 Highlight important log messages\n"
406 "systemd.log_location=0|1 Include code location in log messages\n"
407 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
408 " Set default log output for services\n"
409 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
410 " Set default log error output for services\n"
411 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
412 }
4fc935ca 413
d081dffb 414 } else if (streq(word, "quiet"))
6e98720f 415 arg_show_status = false;
9749cd77
LN		 416 else if (streq(word, "debug"))
417 log_set_max_level(LOG_DEBUG);
d081dffb 418 else if (!in_initrd()) {
f170852a
LP		 419 unsigned i;
420
421 /* SysV compatibility */
f170852a
LP		 422 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
423 if (streq(word, rlmap[i]))
424 return set_default_unit(rlmap[i+1]);
425 }
426
427 return 0;
428}
429
e8e581bf
ZJS		 430#define DEFINE_SETTER(name, func, descr) \
431 static int name(const char *unit, \
432 const char *filename, \
433 unsigned line, \
434 const char *section, \
435 const char *lvalue, \
436 int ltype, \
437 const char *rvalue, \
438 void *data, \
439 void *userdata) { \
440 \
441 int r; \
442 \
443 assert(filename); \
444 assert(lvalue); \
445 assert(rvalue); \
446 \
447 r = func(rvalue); \
448 if (r < 0) \
449 log_syntax(unit, LOG_ERR, filename, line, -r, \
450 "Invalid " descr "'%s': %s", \
451 rvalue, strerror(-r)); \
452 \
453 return 0; \
454 }
487393e9 455
e8e581bf
ZJS		 456DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
457DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
458DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
459DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
487393e9 460
487393e9 461
e8e581bf
ZJS		 462static int config_parse_cpu_affinity2(const char *unit,
463 const char *filename,
464 unsigned line,
465 const char *section,
466 const char *lvalue,
467 int ltype,
468 const char *rvalue,
469 void *data,
470 void *userdata) {
487393e9
LP		 471
472 char *w;
473 size_t l;
474 char *state;
475 cpu_set_t *c = NULL;
476 unsigned ncpus = 0;
477
478 assert(filename);
479 assert(lvalue);
480 assert(rvalue);
481
f60f22df 482 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
487393e9
LP		 483 char *t;
484 int r;
485 unsigned cpu;
486
487 if (!(t = strndup(w, l)))
14212119 488 return log_oom();
487393e9
LP		 489
490 r = safe_atou(t, &cpu);
491 free(t);
492
493 if (!c)
494 if (!(c = cpu_set_malloc(&ncpus)))
14212119 495 return log_oom();
487393e9
LP		 496
497 if (r < 0 || cpu >= ncpus) {
e8e581bf
ZJS		 498 log_syntax(unit, LOG_ERR, filename, line, -r,
499 "Failed to parse CPU affinity '%s'", rvalue);
487393e9
LP		 500 CPU_FREE(c);
501 return -EBADMSG;
502 }
503
504 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
505 }
506
507 if (c) {
508 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
e8e581bf 509 log_warning_unit(unit, "Failed to set CPU affinity: %m");
487393e9
LP		 510
511 CPU_FREE(c);
512 }
513
514 return 0;
515}
516
0c85a4f3
LP		 517static void strv_free_free(char ***l) {
518 char ***i;
519
520 if (!l)
521 return;
522
523 for (i = l; *i; i++)
524 strv_free(*i);
525
526 free(l);
527}
528
529static void free_join_controllers(void) {
0c85a4f3
LP		 530 strv_free_free(arg_join_controllers);
531 arg_join_controllers = NULL;
532}
533
e8e581bf
ZJS		 534static int config_parse_join_controllers(const char *unit,
535 const char *filename,
536 unsigned line,
537 const char *section,
538 const char *lvalue,
539 int ltype,
540 const char *rvalue,
541 void *data,
542 void *userdata) {
0c85a4f3
LP		 543
544 unsigned n = 0;
545 char *state, *w;
546 size_t length;
547
548 assert(filename);
549 assert(lvalue);
550 assert(rvalue);
551
552 free_join_controllers();
553
554 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
555 char *s, **l;
556
557 s = strndup(w, length);
558 if (!s)
14212119 559 return log_oom();
0c85a4f3
LP		 560
561 l = strv_split(s, ",");
562 free(s);
563
564 strv_uniq(l);
565
566 if (strv_length(l) <= 1) {
567 strv_free(l);
568 continue;
569 }
570
571 if (!arg_join_controllers) {
572 arg_join_controllers = new(char**, 2);
573 if (!arg_join_controllers) {
574 strv_free(l);
14212119 575 return log_oom();
0c85a4f3
LP		 576 }
577
578 arg_join_controllers[0] = l;
579 arg_join_controllers[1] = NULL;
580
581 n = 1;
582 } else {
583 char ***a;
584 char ***t;
585
586 t = new0(char**, n+2);
587 if (!t) {
588 strv_free(l);
14212119 589 return log_oom();
0c85a4f3
LP		 590 }
591
592 n = 0;
593
594 for (a = arg_join_controllers; *a; a++) {
595
596 if (strv_overlap(*a, l)) {
597 char **c;
598
599 c = strv_merge(*a, l);
600 if (!c) {
601 strv_free(l);
602 strv_free_free(t);
14212119 603 return log_oom();
0c85a4f3
LP		 604 }
605
606 strv_free(l);
607 l = c;
608 } else {
609 char **c;
610
611 c = strv_copy(*a);
612 if (!c) {
613 strv_free(l);
614 strv_free_free(t);
14212119 615 return log_oom();
0c85a4f3
LP		 616 }
617
618 t[n++] = c;
619 }
620 }
621
622 t[n++] = strv_uniq(l);
623
624 strv_free_free(arg_join_controllers);
625 arg_join_controllers = t;
626 }
627 }
628
629 return 0;
630}
631
487393e9
LP		 632static int parse_config_file(void) {
633
f975e971
LP		 634 const ConfigTableItem items[] = {
635 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
636 { "Manager", "LogTarget", config_parse_target, 0, NULL },
637 { "Manager", "LogColor", config_parse_color, 0, NULL },
638 { "Manager", "LogLocation", config_parse_location, 0, NULL },
639 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
640 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
641 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
f975e971
LP		 642 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
643 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
f975e971
LP		 644 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
645 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
0c85a4f3 646 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
7f602784
LP		 647 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
648 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
ec8927ca 649 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
aa0f64ac 650 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
97d0e5f8 651 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
c93ff2e9
FC		 652 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
653 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
654 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
655 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
656 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
657 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
658 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
659 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
660 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
661 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
662 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
663 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
664 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
665 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
666 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
667 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
f975e971 668 { NULL, NULL, NULL, 0, NULL }
487393e9
LP		 669 };
670
7fd1b19b 671 _cleanup_fclose_ FILE *f;
487393e9
LP		 672 const char *fn;
673 int r;
674
19adb8a3 675 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
f975e971
LP		 676 f = fopen(fn, "re");
677 if (!f) {
487393e9
LP		 678 if (errno == ENOENT)
679 return 0;
680
681 log_warning("Failed to open configuration file '%s': %m", fn);
682 return 0;
683 }
684
db5c0122 685 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
f975e971 686 if (r < 0)
487393e9
LP		 687 log_warning("Failed to parse configuration file: %s", strerror(-r));
688
487393e9
LP		 689 return 0;
690}
691
f170852a 692static int parse_proc_cmdline(void) {
7fd1b19b 693 _cleanup_free_ char *line = NULL;
543295ad 694 char *w, *state;
f170852a 695 int r;
f170852a 696 size_t l;
f170852a 697
b770165a
LP		 698 /* Don't read /proc/cmdline if we are in a container, since
699 * that is only relevant for the host system */
700 if (detect_container(NULL) > 0)
701 return 0;
702
543295ad
ZJS		 703 r = read_one_line_file("/proc/cmdline", &line);
704 if (r < 0) {
e364ad06 705 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
f170852a
LP		 706 return 0;
707 }
708
709 FOREACH_WORD_QUOTED(w, l, line, state) {
7fd1b19b 710 _cleanup_free_ char *word;
f170852a 711
543295ad
ZJS		 712 word = strndup(w, l);
713 if (!word)
714 return log_oom();
f170852a
LP		 715
716 r = parse_proc_cmdline_word(word);
14212119
SL		 717 if (r < 0) {
718 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
543295ad 719 return r;
14212119 720 }
f170852a
LP		 721 }
722
543295ad 723 return 0;
f170852a
LP		 724}
725
726static int parse_argv(int argc, char *argv[]) {
727
728 enum {
729 ARG_LOG_LEVEL = 0x100,
730 ARG_LOG_TARGET,
bbe63281
LP		 731 ARG_LOG_COLOR,
732 ARG_LOG_LOCATION,
2f198e2f 733 ARG_UNIT,
edb9aaa8 734 ARG_SYSTEM,
af2d49f7 735 ARG_USER,
e537352b 736 ARG_TEST,
9ba0bc4e 737 ARG_VERSION,
80876c20 738 ARG_DUMP_CONFIGURATION_ITEMS,
9e58ff9c
LP		 739 ARG_DUMP_CORE,
740 ARG_CRASH_SHELL,
a16e1123 741 ARG_CONFIRM_SPAWN,
9e58ff9c 742 ARG_SHOW_STATUS,
4288f619 743 ARG_DESERIALIZE,
2660882b 744 ARG_SWITCHED_ROOT,
0a494f1f
LP		 745 ARG_INTROSPECT,
746 ARG_DEFAULT_STD_OUTPUT,
747 ARG_DEFAULT_STD_ERROR
f170852a
LP		 748 };
749
750 static const struct option options[] = {
a16e1123
LP		 751 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
752 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
bbe63281
LP		 753 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
754 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
2f198e2f 755 { "unit", required_argument, NULL, ARG_UNIT },
edb9aaa8 756 { "system", no_argument, NULL, ARG_SYSTEM },
af2d49f7 757 { "user", no_argument, NULL, ARG_USER },
a16e1123
LP		 758 { "test", no_argument, NULL, ARG_TEST },
759 { "help", no_argument, NULL, 'h' },
9ba0bc4e 760 { "version", no_argument, NULL, ARG_VERSION },
a16e1123 761 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
a5d87bf0
LP		 762 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
763 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
764 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
6e98720f 765 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
a16e1123 766 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
2660882b 767 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
4288f619 768 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
0a494f1f
LP		 769 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
770 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
a16e1123 771 { NULL, 0, NULL, 0 }
f170852a
LP		 772 };
773
774 int c, r;
775
776 assert(argc >= 1);
777 assert(argv);
778
b770165a
LP		 779 if (getpid() == 1)
780 opterr = 0;
781
099663ff 782 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
f170852a
LP		 783
784 switch (c) {
785
786 case ARG_LOG_LEVEL:
787 if ((r = log_set_max_level_from_string(optarg)) < 0) {
788 log_error("Failed to parse log level %s.", optarg);
789 return r;
790 }
791
792 break;
793
794 case ARG_LOG_TARGET:
795
796 if ((r = log_set_target_from_string(optarg)) < 0) {
797 log_error("Failed to parse log target %s.", optarg);
798 return r;
799 }
800
801 break;
802
bbe63281
LP		 803 case ARG_LOG_COLOR:
804
d0b170c8
LP		 805 if (optarg) {
806 if ((r = log_show_color_from_string(optarg)) < 0) {
807 log_error("Failed to parse log color setting %s.", optarg);
808 return r;
809 }
810 } else
811 log_show_color(true);
bbe63281
LP		 812
813 break;
814
815 case ARG_LOG_LOCATION:
816
d0b170c8
LP		 817 if (optarg) {
818 if ((r = log_show_location_from_string(optarg)) < 0) {
819 log_error("Failed to parse log location setting %s.", optarg);
820 return r;
821 }
822 } else
823 log_show_location(true);
bbe63281
LP		 824
825 break;
826
0a494f1f
LP		 827 case ARG_DEFAULT_STD_OUTPUT:
828
829 if ((r = exec_output_from_string(optarg)) < 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
838 if ((r = exec_output_from_string(optarg)) < 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
2f198e2f 845 case ARG_UNIT:
f170852a
LP		 846
847 if ((r = set_default_unit(optarg)) < 0) {
848 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
849 return r;
850 }
851
852 break;
853
edb9aaa8 854 case ARG_SYSTEM:
67445f4e 855 arg_running_as = SYSTEMD_SYSTEM;
edb9aaa8 856 break;
a5dab5ce 857
af2d49f7 858 case ARG_USER:
67445f4e 859 arg_running_as = SYSTEMD_USER;
a5dab5ce 860 break;
a5dab5ce 861
e965d56d 862 case ARG_TEST:
fa0f4d8a 863 arg_action = ACTION_TEST;
e965d56d
LP		 864 break;
865
9ba0bc4e
ZJS		 866 case ARG_VERSION:
867 arg_action = ACTION_VERSION;
868 break;
869
e537352b 870 case ARG_DUMP_CONFIGURATION_ITEMS:
fa0f4d8a 871 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
e537352b
LP		 872 break;
873
9e58ff9c 874 case ARG_DUMP_CORE:
a5d87bf0
LP		 875 r = optarg ? parse_boolean(optarg) : 1;
876 if (r < 0) {
877 log_error("Failed to parse dump core boolean %s.", optarg);
878 return r;
879 }
880 arg_dump_core = r;
9e58ff9c
LP		 881 break;
882
883 case ARG_CRASH_SHELL:
a5d87bf0
LP		 884 r = optarg ? parse_boolean(optarg) : 1;
885 if (r < 0) {
886 log_error("Failed to parse crash shell boolean %s.", optarg);
887 return r;
888 }
889 arg_crash_shell = r;
9e58ff9c
LP		 890 break;
891
80876c20 892 case ARG_CONFIRM_SPAWN:
a5d87bf0
LP		 893 r = optarg ? parse_boolean(optarg) : 1;
894 if (r < 0) {
895 log_error("Failed to parse confirm spawn boolean %s.", optarg);
896 return r;
897 }
898 arg_confirm_spawn = r;
80876c20
LP		 899 break;
900
9e58ff9c 901 case ARG_SHOW_STATUS:
a5d87bf0
LP		 902 r = optarg ? parse_boolean(optarg) : 1;
903 if (r < 0) {
904 log_error("Failed to parse show status boolean %s.", optarg);
905 return r;
906 }
907 arg_show_status = r;
6e98720f 908 break;
a5d87bf0 909
a16e1123
LP		 910 case ARG_DESERIALIZE: {
911 int fd;
912 FILE *f;
913
01e10de3
LP		 914 r = safe_atoi(optarg, &fd);
915 if (r < 0 || fd < 0) {
a16e1123 916 log_error("Failed to parse deserialize option %s.", optarg);
01e10de3 917 return r < 0 ? r : -EINVAL;
a16e1123
LP		 918 }
919
01e10de3
LP		 920 fd_cloexec(fd, true);
921
922 f = fdopen(fd, "r");
923 if (!f) {
a16e1123 924 log_error("Failed to open serialization fd: %m");
01e10de3 925 return -errno;
a16e1123
LP		 926 }
927
928 if (serialization)
929 fclose(serialization);
930
931 serialization = f;
932
933 break;
934 }
935
2660882b 936 case ARG_SWITCHED_ROOT:
bf4df7c3 937 arg_switched_root = true;
d03bc1b8
HH		 938 break;
939
4288f619
LP		 940 case ARG_INTROSPECT: {
941 const char * const * i = NULL;
942
943 for (i = bus_interface_table; *i; i += 2)
944 if (!optarg || streq(i[0], optarg)) {
945 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
946 "<node>\n", stdout);
947 fputs(i[1], stdout);
948 fputs("</node>\n", stdout);
949
950 if (optarg)
951 break;
952 }
953
954 if (!i[0] && optarg)
955 log_error("Unknown interface %s.", optarg);
956
fa0f4d8a 957 arg_action = ACTION_DONE;
4288f619
LP		 958 break;
959 }
960
f170852a 961 case 'h':
fa0f4d8a 962 arg_action = ACTION_HELP;
f170852a
LP		 963 break;
964
1d2e23ab
LP		 965 case 'D':
966 log_set_max_level(LOG_DEBUG);
967 break;
968
099663ff
LP		 969 case 'b':
970 case 's':
971 case 'z':
972 /* Just to eat away the sysvinit kernel
973 * cmdline args without getopt() error
974 * messages that we'll parse in
975 * parse_proc_cmdline_word() or ignore. */
f170852a 976
099663ff 977 case '?':
f170852a 978 default:
099663ff
LP		 979 if (getpid() != 1) {
980 log_error("Unknown option code %c", c);
981 return -EINVAL;
982 }
983
984 break;
f170852a
LP		 985 }
986
d821e6d6
LP		 987 if (optind < argc && getpid() != 1) {
988 /* Hmm, when we aren't run as init system
989 * let's complain about excess arguments */
990
991 log_error("Excess arguments.");
992 return -EINVAL;
993 }
994
995 if (detect_container(NULL) > 0) {
996 char **a;
997
998 /* All /proc/cmdline arguments the kernel didn't
999 * understand it passed to us. We're not really
1000 * interested in that usually since /proc/cmdline is
1001 * more interesting and complete. With one exception:
1002 * if we are run in a container /proc/cmdline is not
1003 * relevant for the container, hence we rely on argv[]
1004 * instead. */
1005
1006 for (a = argv; a < argv + argc; a++)
14212119
SL		 1007 if ((r = parse_proc_cmdline_word(*a)) < 0) {
1008 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
d821e6d6 1009 return r;
14212119 1010 }
51f0e189
LP		 1011 }
1012
f170852a
LP		 1013 return 0;
1014}
1015
1016static int help(void) {
1017
2e33c433 1018 printf("%s [OPTIONS...]\n\n"
af2d49f7 1019 "Starts up and maintains the system or user services.\n\n"
e537352b 1020 " -h --help Show this help\n"
e537352b 1021 " --test Determine startup sequence, dump it and exit\n"
80876c20 1022 " --dump-configuration-items Dump understood unit configuration items\n"
bbe63281 1023 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
9e58ff9c 1024 " --unit=UNIT Set default unit\n"
edb9aaa8 1025 " --system Run a system instance, even if PID != 1\n"
af2d49f7 1026 " --user Run a user instance\n"
a5d87bf0
LP		 1027 " --dump-core[=0|1] Dump core on crash\n"
1028 " --crash-shell[=0|1] Run shell on crash\n"
1029 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
6e98720f 1030 " --show-status[=0|1] Show status updates on the console during bootup\n"
4cfa2c99 1031 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
9e58ff9c 1032 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
2218198b 1033 " --log-color[=0|1] Highlight important log messages\n"
0a494f1f
LP		 1034 " --log-location[=0|1] Include code location in log messages\n"
1035 " --default-standard-output= Set default standard output for services\n"
1036 " --default-standard-error= Set default standard error output for services\n",
5b6319dc 1037 program_invocation_short_name);
f170852a
LP		 1038
1039 return 0;
1040}
1041
9ba0bc4e
ZJS		 1042static int version(void) {
1043 puts(PACKAGE_STRING);
9ba0bc4e
ZJS		 1044 puts(SYSTEMD_FEATURES);
1045
1046 return 0;
1047}
1048
b3680f49 1049static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
a16e1123
LP		 1050 FILE *f = NULL;
1051 FDSet *fds = NULL;
1052 int r;
1053
1054 assert(m);
1055 assert(_f);
1056 assert(_fds);
1057
6b78f9b4
LP		 1058 r = manager_open_serialization(m, &f);
1059 if (r < 0) {
35b8ca3a 1060 log_error("Failed to create serialization file: %s", strerror(-r));
a16e1123
LP		 1061 goto fail;
1062 }
1063
71445ae7
LP		 1064 /* Make sure nothing is really destructed when we shut down */
1065 m->n_reloading ++;
1066 bus_broadcast_reloading(m, true);
1067
6b78f9b4
LP		 1068 fds = fdset_new();
1069 if (!fds) {
a16e1123
LP		 1070 r = -ENOMEM;
1071 log_error("Failed to allocate fd set: %s", strerror(-r));
1072 goto fail;
1073 }
1074
b3680f49 1075 r = manager_serialize(m, f, fds, switching_root);
6b78f9b4 1076 if (r < 0) {
a16e1123
LP		 1077 log_error("Failed to serialize state: %s", strerror(-r));
1078 goto fail;
1079 }
1080
1081 if (fseeko(f, 0, SEEK_SET) < 0) {
1082 log_error("Failed to rewind serialization fd: %m");
1083 goto fail;
1084 }
1085
6b78f9b4
LP		 1086 r = fd_cloexec(fileno(f), false);
1087 if (r < 0) {
a16e1123
LP		 1088 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1089 goto fail;
1090 }
1091
6b78f9b4
LP		 1092 r = fdset_cloexec(fds, false);
1093 if (r < 0) {
a16e1123
LP		 1094 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1095 goto fail;
1096 }
1097
1098 *_f = f;
1099 *_fds = fds;
1100
1101 return 0;
1102
1103fail:
1104 fdset_free(fds);
1105
1106 if (f)
1107 fclose(f);
1108
1109 return r;
1110}
1111
4096d6f5
LP		 1112static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1113 struct rlimit nl;
1114 int r;
1115
1116 assert(saved_rlimit);
1117
1118 /* Save the original RLIMIT_NOFILE so that we can reset it
1119 * later when transitioning from the initrd to the main
1120 * systemd or suchlike. */
1121 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1122 log_error("Reading RLIMIT_NOFILE failed: %m");
1123 return -errno;
1124 }
1125
1126 /* Make sure forked processes get the default kernel setting */
1127 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1128 struct rlimit *rl;
1129
1130 rl = newdup(struct rlimit, saved_rlimit, 1);
1131 if (!rl)
1132 return log_oom();
1133
1134 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1135 }
1136
1137 /* Bump up the resource limit for ourselves substantially */
1138 nl.rlim_cur = nl.rlim_max = 64*1024;
1139 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1140 if (r < 0) {
1141 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1142 return r;
1143 }
1144
1145 return 0;
1146}
1147
6ee5bbf8
LP		 1148static void test_mtab(void) {
1149 char *p;
1150
80758717
LP		 1151 /* Check that /etc/mtab is a symlink */
1152
6ee5bbf8
LP		 1153 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1154 bool b;
1155
ed86ebc4 1156 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
6ee5bbf8
LP		 1157 free(p);
1158
1159 if (b)
1160 return;
1161 }
1162
80758717
LP		 1163 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1164 "This is not supported anymore. "
1165 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1166}
1167
1168static void test_usr(void) {
80758717 1169
ed1c99fc 1170 /* Check that /usr is not a separate fs */
80758717 1171
871c44a7
LP		 1172 if (dir_is_empty("/usr") <= 0)
1173 return;
1174
2376ce13 1175 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
871c44a7
LP		 1176 "Some things will probably break (sometimes even silently) in mysterious ways. "
1177 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1178}
1179
1180static void test_cgroups(void) {
1181
1182 if (access("/proc/cgroups", F_OK) >= 0)
1183 return;
1184
1185 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1186 "Systems without control groups are not supported. "
1187 "We will now sleep for 10s, and then continue boot-up. "
1188 "Expect breakage and please do not file bugs. "
966a5d37
LP		 1189 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1190 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
871c44a7
LP		 1191
1192 sleep(10);
6ee5bbf8
LP		 1193}
1194
a07fdfa3
LP		 1195static int initialize_join_controllers(void) {
1196 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1197 * + "net_prio". We'd like to add "cpuset" to the mix, but
1198 * "cpuset" does't really work for groups with no initialized
1199 * attributes. */
1200
1201 arg_join_controllers = new(char**, 3);
1202 if (!arg_join_controllers)
1203 return -ENOMEM;
1204
1205 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
a07fdfa3 1206 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
a6b26d90
ZJS		 1207 arg_join_controllers[2] = NULL;
1208
1209 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1210 free_join_controllers();
a07fdfa3 1211 return -ENOMEM;
a6b26d90 1212 }
a07fdfa3 1213
a07fdfa3
LP		 1214 return 0;
1215}
1216
60918275
LP		 1217int main(int argc, char *argv[]) {
1218 Manager *m = NULL;
22f4096c 1219 int r, retval = EXIT_FAILURE;
9d76d730
LP		 1220 usec_t before_startup, after_startup;
1221 char timespan[FORMAT_TIMESPAN_MAX];
a16e1123
LP		 1222 FDSet *fds = NULL;
1223 bool reexecute = false;
b9080b03 1224 const char *shutdown_verb = NULL;
e9ddabc2 1225 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
c3a170f3
HH		 1226 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1227 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
5d6b1584 1228 static char systemd[] = "systemd";
2660882b 1229 bool skip_setup = false;
0b3325e7
LP		 1230 int j;
1231 bool loaded_policy = false;
e96d6be7 1232 bool arm_reboot_watchdog = false;
bf4df7c3 1233 bool queue_default_job = false;
41669317 1234 char *switch_root_dir = NULL, *switch_root_init = NULL;
4096d6f5 1235 static struct rlimit saved_rlimit_nofile = { 0, 0 };
27b14a22 1236
058dc6f3 1237#ifdef HAVE_SYSV_COMPAT
2cb1a60d 1238 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
35b8ca3a 1239 /* This is compatibility support for SysV, where
2cb1a60d
LP		 1240 * calling init as a user is identical to telinit. */
1241
1242 errno = -ENOENT;
1243 execv(SYSTEMCTL_BINARY_PATH, argv);
1244 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1245 return 1;
1246 }
058dc6f3 1247#endif
2cb1a60d 1248
c3a170f3
HH		 1249 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1250 dual_timestamp_get(&userspace_timestamp);
1251
0b3325e7
LP		 1252 /* Determine if this is a reexecution or normal bootup. We do
1253 * the full command line parsing much later, so let's just
1254 * have a quick peek here. */
db813c2a
LP		 1255 if (strv_find(argv+1, "--deserialize"))
1256 skip_setup = true;
0b3325e7 1257
2660882b
LP		 1258 /* If we have switched root, do all the special setup
1259 * things */
db813c2a
LP		 1260 if (strv_find(argv+1, "--switched-root"))
1261 skip_setup = false;
d03bc1b8 1262
f3b6a3ed
LP		 1263 /* If we get started via the /sbin/init symlink then we are
1264 called 'init'. After a subsequent reexecution we are then
1265 called 'systemd'. That is confusing, hence let's call us
1266 systemd right-away. */
f3b6a3ed
LP		 1267 program_invocation_short_name = systemd;
1268 prctl(PR_SET_NAME, systemd);
5d6b1584 1269
9a0e6896
LP		 1270 saved_argv = argv;
1271 saved_argc = argc;
f3b6a3ed 1272
2cc59dbf 1273 log_show_color(isatty(STDERR_FILENO) > 0);
bbe63281 1274
a866073d 1275 if (getpid() == 1 && detect_container(NULL) <= 0) {
4f8d551f 1276
a866073d 1277 /* Running outside of a container as PID 1 */
67445f4e 1278 arg_running_as = SYSTEMD_SYSTEM;
a866073d
LP		 1279 make_null_stdio();
1280 log_set_target(LOG_TARGET_KMSG);
1281 log_open();
1282
c3ba6250
HH		 1283 if (in_initrd()) {
1284 char *rd_timestamp = NULL;
1285
c3a170f3 1286 initrd_timestamp = userspace_timestamp;
c3ba6250
HH		 1287 asprintf(&rd_timestamp, "%llu %llu",
1288 (unsigned long long) initrd_timestamp.realtime,
1289 (unsigned long long) initrd_timestamp.monotonic);
1290 if (rd_timestamp) {
1291 setenv("RD_TIMESTAMP", rd_timestamp, 1);
1292 free(rd_timestamp);
1293 }
1294 }
1295
2660882b 1296 if (!skip_setup) {
8f838d8a 1297 mount_setup_early();
0b3325e7
LP		 1298 if (selinux_setup(&loaded_policy) < 0)
1299 goto finish;
81611586
RS		 1300 if (ima_setup() < 0)
1301 goto finish;
ffbd2c4d
NC		 1302 if (smack_setup() < 0)
1303 goto finish;
81611586 1304 }
0b3325e7 1305
e9a5ef7c 1306 if (label_init(NULL) < 0)
0ff4cdd9 1307 goto finish;
7948c4df 1308
72edcff5 1309 if (!skip_setup) {
0b3325e7
LP		 1310 if (hwclock_is_localtime() > 0) {
1311 int min;
7948c4df 1312
72edcff5
KS		 1313 /* The first-time call to settimeofday() does a time warp in the kernel */
1314 r = hwclock_set_timezone(&min);
0b3325e7
LP		 1315 if (r < 0)
1316 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1317 else
1318 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
19e65613
KS		 1319 } else if (!in_initrd()) {
1320 /*
1321 * Do dummy first-time call to seal the kernel's time warp magic
1322 *
1323 * Do not call this this from inside the initrd. The initrd might not
1324 * carry /etc/adjtime with LOCAL, but the real system could be set up
1325 * that way. In such case, we need to delay the time-warp or the sealing
1326 * until we reach the real system.
1327 */
72edcff5 1328 hwclock_reset_timezone();
871e5809 1329
e9dd9f95 1330 /* Tell the kernel our timezone */
72edcff5
KS		 1331 r = hwclock_set_timezone(NULL);
1332 if (r < 0)
e9dd9f95 1333 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
72edcff5
KS		 1334 }
1335 }
a866073d
LP		 1336
1337 /* Set the default for later on, but don't actually
1338 * open the logs like this for now. Note that if we
1339 * are transitioning from the initrd there might still
1340 * be journal fd open, and we shouldn't attempt
1341 * opening that before we parsed /proc/cmdline which
1342 * might redirect output elsewhere. */
1343 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1344
1345 } else if (getpid() == 1) {
a866073d 1346 /* Running inside a container, as PID 1 */
67445f4e 1347 arg_running_as = SYSTEMD_SYSTEM;
a866073d
LP		 1348 log_set_target(LOG_TARGET_CONSOLE);
1349 log_open();
1350
1351 /* For the later on, see above... */
1352 log_set_target(LOG_TARGET_JOURNAL);
1353
c3a170f3
HH		 1354 /* clear the kernel timestamp,
1355 * because we are in a container */
1356 kernel_timestamp.monotonic = 0ULL;
1357 kernel_timestamp.realtime = 0ULL;
a866073d 1358
c3a170f3 1359 } else {
a866073d 1360 /* Running as user instance */
67445f4e 1361 arg_running_as = SYSTEMD_USER;
eeecf6e6 1362 log_set_target(LOG_TARGET_AUTO);
871e5809 1363 log_open();
c3a170f3
HH		 1364
1365 /* clear the kernel timestamp,
1366 * because we are not PID 1 */
1367 kernel_timestamp.monotonic = 0ULL;
1368 kernel_timestamp.realtime = 0ULL;
bbe63281 1369 }
a5dab5ce 1370
0c85a4f3 1371 /* Initialize default unit */
6afa301b
LP		 1372 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1373 if (r < 0) {
14212119 1374 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
f170852a 1375 goto finish;
14212119 1376 }
60918275 1377
a07fdfa3
LP		 1378 r = initialize_join_controllers();
1379 if (r < 0)
0c85a4f3
LP		 1380 goto finish;
1381
f170852a
LP		 1382 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1383 * /proc/$PID/fd is available. */
c1dae1b3 1384 if (getpid() == 1) {
0c85a4f3
LP		 1385 r = mount_setup(loaded_policy);
1386 if (r < 0)
8efe3c01 1387 goto finish;
0c85a4f3 1388 }
4ade7963
LP		 1389
1390 /* Reset all signal handlers. */
1391 assert_se(reset_all_signal_handlers() == 0);
1392
9a34ec5f 1393 ignore_signals(SIGNALS_IGNORE, -1);
078e4539 1394
487393e9
LP		 1395 if (parse_config_file() < 0)
1396 goto finish;
1397
67445f4e 1398 if (arg_running_as == SYSTEMD_SYSTEM)
a5dab5ce
LP		 1399 if (parse_proc_cmdline() < 0)
1400 goto finish;
f170852a
LP		 1401
1402 log_parse_environment();
1403
1404 if (parse_argv(argc, argv) < 0)
1405 goto finish;
1406
6bae23a0
TB		 1407 if (arg_action == ACTION_TEST &&
1408 geteuid() == 0) {
b5c6cf87
LP		 1409 log_error("Don't run test mode as root.");
1410 goto finish;
1411 }
1412
6bae23a0
TB		 1413 if (arg_running_as == SYSTEMD_USER &&
1414 arg_action == ACTION_RUN &&
1415 sd_booted() <= 0) {
1416 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1417 goto finish;
1418 }
1419
67445f4e 1420 if (arg_running_as == SYSTEMD_SYSTEM &&
fe783b03
LP		 1421 arg_action == ACTION_RUN &&
1422 running_in_chroot() > 0) {
1423 log_error("Cannot be run in a chroot() environment.");
1424 goto finish;
1425 }
1426
fa0f4d8a 1427 if (arg_action == ACTION_HELP) {
f170852a
LP		 1428 retval = help();
1429 goto finish;
9ba0bc4e
ZJS		 1430 } else if (arg_action == ACTION_VERSION) {
1431 retval = version();
1432 goto finish;
fa0f4d8a 1433 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
e537352b 1434 unit_dump_config_items(stdout);
22f4096c 1435 retval = EXIT_SUCCESS;
e537352b 1436 goto finish;
fa0f4d8a 1437 } else if (arg_action == ACTION_DONE) {
22f4096c 1438 retval = EXIT_SUCCESS;
4288f619 1439 goto finish;
f170852a
LP		 1440 }
1441
fa0f4d8a 1442 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
f170852a 1443
871e5809
LP		 1444 /* Close logging fds, in order not to confuse fdset below */
1445 log_close();
1446
a16e1123 1447 /* Remember open file descriptors for later deserialization */
01e10de3
LP		 1448 r = fdset_new_fill(&fds);
1449 if (r < 0) {
1450 log_error("Failed to allocate fd set: %s", strerror(-r));
1451 goto finish;
1452 } else
1453 fdset_cloexec(fds, true);
a16e1123 1454
01e10de3 1455 if (serialization)
a16e1123 1456 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
a16e1123 1457
09082a94 1458 /* Set up PATH unless it is already set */
e537352b 1459 setenv("PATH",
2c6db6fb 1460#ifdef HAVE_SPLIT_USR
e537352b 1461 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
2c6db6fb
LP		 1462#else
1463 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1464#endif
67445f4e 1465 arg_running_as == SYSTEMD_SYSTEM);
09082a94 1466
67445f4e 1467 if (arg_running_as == SYSTEMD_SYSTEM) {
e9ddabc2
LP		 1468 /* Unset some environment variables passed in from the
1469 * kernel that don't really make sense for us. */
39439087
LP		 1470 unsetenv("HOME");
1471 unsetenv("TERM");
b770165a 1472
9543ad16
LP		 1473 /* When we are invoked by a shell, these might be set,
1474 * but make little sense to pass on */
1475 unsetenv("PWD");
1476 unsetenv("SHLVL");
1477 unsetenv("_");
1478
2660882b 1479 /* When we are invoked by a chroot-like tool such as
9f28b98e
LP		 1480 * nspawn, these might be set, but make little sense
1481 * to pass on */
1482 unsetenv("USER");
1483 unsetenv("LOGNAME");
1484
01e10de3
LP		 1485 /* We suppress the socket activation env vars, as
1486 * we'll try to match *any* open fd to units if
1487 * possible. */
1488 unsetenv("LISTEN_FDS");
1489 unsetenv("LISTEN_PID");
1490
b770165a
LP		 1491 /* All other variables are left as is, so that clients
1492 * can still read them via /proc/1/environ */
f170852a 1493
80876c20
LP		 1494 /* Become a session leader if we aren't one yet. */
1495 setsid();
4ade7963 1496
80876c20
LP		 1497 /* Disable the umask logic */
1498 umask(0);
1499 }
1500
befb5b6a
LP		 1501 /* Move out of the way, so that we won't block unmounts */
1502 assert_se(chdir("/") == 0);
1503
843d2643
LP		 1504 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1505 dbus_connection_set_change_sigpipe(FALSE);
1506
2146621b
LP		 1507 /* Reset the console, but only if this is really init and we
1508 * are freshly booted */
67445f4e 1509 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
2660882b 1510 console_setup(getpid() == 1 && !skip_setup);
4ade7963 1511
18149b9f 1512 /* Open the logging devices, if possible and necessary */
843d2643 1513 log_open();
4ade7963 1514
5373d602
LP		 1515 /* Make sure we leave a core dump without panicing the
1516 * kernel. */
ab422445 1517 if (getpid() == 1) {
4fc935ca 1518 install_crash_handler();
97c4f35c 1519
0c85a4f3
LP		 1520 r = mount_cgroup_controllers(arg_join_controllers);
1521 if (r < 0)
1522 goto finish;
1523 }
1524
67445f4e 1525 if (arg_running_as == SYSTEMD_SYSTEM) {
c20f5ac7
LP		 1526 const char *virtualization = NULL;
1527
bc270841 1528 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
c20f5ac7
LP		 1529
1530 detect_virtualization(&virtualization);
1531 if (virtualization)
1532 log_info("Detected virtualization '%s'.", virtualization);
1533
26a1efdf
LP		 1534 if (in_initrd())
1535 log_info("Running in initial RAM disk.");
1536
c20f5ac7 1537 } else
bc270841 1538 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
a5dab5ce 1539
67445f4e 1540 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
72bca11b
LP		 1541 locale_setup();
1542
6faa1114 1543 if (arg_show_status || plymouth_running())
888c6216
LP		 1544 status_welcome();
1545
e3043162 1546#ifdef HAVE_KMOD
888c6216 1547 kmod_setup();
e3043162 1548#endif
888c6216 1549 hostname_setup();
d7ccca2e 1550 machine_id_setup();
888c6216 1551 loopback_setup();
490aed58 1552
6ee5bbf8 1553 test_mtab();
80758717 1554 test_usr();
871c44a7 1555 test_cgroups();
af5bc85d 1556 }
302e8c4c 1557
67445f4e 1558 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
e96d6be7
LP		 1559 watchdog_set_timeout(&arg_runtime_watchdog);
1560
aa0f64ac
LP		 1561 if (arg_timer_slack_nsec != (nsec_t) -1)
1562 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1563 log_error("Failed to adjust timer slack: %m");
1564
ec8927ca
LP		 1565 if (arg_capability_bounding_set_drop) {
1566 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1567 if (r < 0) {
1568 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1569 goto finish;
1570 }
939b8f14
LP		 1571 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1572 if (r < 0) {
1573 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1574 goto finish;
1575 }
ec8927ca
LP		 1576 }
1577
67445f4e 1578 if (arg_running_as == SYSTEMD_USER) {
d4447f4d 1579 /* Become reaper of our children */
8b8ffe68
LP		 1580 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1581 log_warning("Failed to make us a subreaper: %m");
1582 if (errno == EINVAL)
ddfa5101 1583 log_info("Perhaps the kernel version is too old (< 3.4?)");
8b8ffe68 1584 }
d4447f4d
AK		 1585 }
1586
67445f4e 1587 if (arg_running_as == SYSTEMD_SYSTEM)
4096d6f5
LP		 1588 bump_rlimit_nofile(&saved_rlimit_nofile);
1589
6fa48533 1590 r = manager_new(arg_running_as, !!serialization, &m);
e96d6be7 1591 if (r < 0) {
8e274523 1592 log_error("Failed to allocate manager object: %s", strerror(-r));
60918275
LP		 1593 goto finish;
1594 }
1595
9e58ff9c 1596 m->confirm_spawn = arg_confirm_spawn;
0a494f1f
LP		 1597 m->default_std_output = arg_default_std_output;
1598 m->default_std_error = arg_default_std_error;
e96d6be7
LP		 1599 m->runtime_watchdog = arg_runtime_watchdog;
1600 m->shutdown_watchdog = arg_shutdown_watchdog;
c3a170f3
HH		 1601 m->userspace_timestamp = userspace_timestamp;
1602 m->kernel_timestamp = kernel_timestamp;
c3a170f3 1603 m->initrd_timestamp = initrd_timestamp;
9e58ff9c 1604
c93ff2e9
FC		 1605 manager_set_default_rlimits(m, arg_default_rlimit);
1606
97d0e5f8
UTL		 1607 if (arg_default_environment)
1608 manager_set_default_environment(m, arg_default_environment);
1609
27d340c7
LP		 1610 manager_set_show_status(m, arg_show_status);
1611
bf4df7c3
LP		 1612 /* Remember whether we should queue the default job */
1613 queue_default_job = !serialization || arg_switched_root;
1614
9d76d730
LP		 1615 before_startup = now(CLOCK_MONOTONIC);
1616
e96d6be7
LP		 1617 r = manager_startup(m, serialization, fds);
1618 if (r < 0)
6e2ef85b 1619 log_error("Failed to fully start up daemon: %s", strerror(-r));
a16e1123 1620
bf4df7c3
LP		 1621 /* This will close all file descriptors that were opened, but
1622 * not claimed by any unit. */
01e10de3 1623 fdset_free(fds);
f50e0a01 1624
a16e1123
LP		 1625 if (serialization) {
1626 fclose(serialization);
1627 serialization = NULL;
bf4df7c3
LP		 1628 }
1629
1630 if (queue_default_job) {
398ef8ba 1631 DBusError error;
1c27d3f3 1632 Unit *target = NULL;
bacbccb7 1633 Job *default_unit_job;
398ef8ba
LP		 1634
1635 dbus_error_init(&error);
1636
fa0f4d8a 1637 log_debug("Activating default unit: %s", arg_default_unit);
a16e1123 1638
e96d6be7
LP		 1639 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1640 if (r < 0) {
398ef8ba
LP		 1641 log_error("Failed to load default target: %s", bus_error(&error, r));
1642 dbus_error_free(&error);
c2756a68 1643 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
ac155bb8
MS		 1644 log_error("Failed to load default target: %s", strerror(-target->load_error));
1645 else if (target->load_state == UNIT_MASKED)
6daf4f90 1646 log_error("Default target masked.");
27b14a22 1647
ac155bb8 1648 if (!target || target->load_state != UNIT_LOADED) {
a16e1123 1649 log_info("Trying to load rescue target...");
1c27d3f3 1650
e96d6be7
LP		 1651 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1652 if (r < 0) {
398ef8ba
LP		 1653 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1654 dbus_error_free(&error);
a16e1123 1655 goto finish;
11ddb6f4 1656 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
ac155bb8 1657 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1c27d3f3 1658 goto finish;
ac155bb8 1659 } else if (target->load_state == UNIT_MASKED) {
6daf4f90 1660 log_error("Rescue target masked.");
00dc5d76 1661 goto finish;
a16e1123
LP		 1662 }
1663 }
37d88da7 1664
ac155bb8 1665 assert(target->load_state == UNIT_LOADED);
00dc5d76 1666
fa0f4d8a 1667 if (arg_action == ACTION_TEST) {
40d50879 1668 printf("-> By units:\n");
a16e1123
LP		 1669 manager_dump_units(m, stdout, "\t");
1670 }
1671
95f1b47d 1672 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
ab17a050 1673 if (r == -EPERM) {
cd8f53ab 1674 log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
ab17a050
LP		 1675 dbus_error_free(&error);
1676
1677 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1678 if (r < 0) {
1679 log_error("Failed to start default target: %s", bus_error(&error, r));
1680 dbus_error_free(&error);
1681 goto finish;
1682 }
1683 } else if (r < 0) {
1684 log_error("Failed to isolate default target: %s", bus_error(&error, r));
398ef8ba 1685 dbus_error_free(&error);
37d88da7
LP		 1686 goto finish;
1687 }
ab17a050 1688
bacbccb7 1689 m->default_unit_job_id = default_unit_job->id;
60918275 1690
07672f49
LP		 1691 after_startup = now(CLOCK_MONOTONIC);
1692 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1693 "Loaded units and determined initial transaction in %s.",
2fa4092c 1694 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
07672f49 1695
fa0f4d8a 1696 if (arg_action == ACTION_TEST) {
40d50879 1697 printf("-> By jobs:\n");
a16e1123 1698 manager_dump_jobs(m, stdout, "\t");
22f4096c 1699 retval = EXIT_SUCCESS;
a16e1123
LP		 1700 goto finish;
1701 }
e965d56d 1702 }
d46de8a1 1703
a16e1123 1704 for (;;) {
e96d6be7
LP		 1705 r = manager_loop(m);
1706 if (r < 0) {
a16e1123
LP		 1707 log_error("Failed to run mainloop: %s", strerror(-r));
1708 goto finish;
1709 }
11dd41ce 1710
a16e1123 1711 switch (m->exit_code) {
e965d56d 1712
a16e1123 1713 case MANAGER_EXIT:
22f4096c 1714 retval = EXIT_SUCCESS;
a16e1123
LP		 1715 log_debug("Exit.");
1716 goto finish;
e965d56d 1717
a16e1123 1718 case MANAGER_RELOAD:
e015090f 1719 log_info("Reloading.");
e96d6be7
LP		 1720 r = manager_reload(m);
1721 if (r < 0)
a16e1123
LP		 1722 log_error("Failed to reload: %s", strerror(-r));
1723 break;
cea8e32e 1724
a16e1123 1725 case MANAGER_REEXECUTE:
664f88a7 1726
b3680f49 1727 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
a16e1123 1728 goto finish;
60918275 1729
a16e1123 1730 reexecute = true;
e015090f 1731 log_notice("Reexecuting.");
a16e1123
LP		 1732 goto finish;
1733
664f88a7
LP		 1734 case MANAGER_SWITCH_ROOT:
1735 /* Steal the switch root parameters */
41669317 1736 switch_root_dir = m->switch_root;
664f88a7
LP		 1737 switch_root_init = m->switch_root_init;
1738 m->switch_root = m->switch_root_init = NULL;
1739
1740 if (!switch_root_init)
b3680f49 1741 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
664f88a7
LP		 1742 goto finish;
1743
1744 reexecute = true;
1745 log_notice("Switching root.");
1746 goto finish;
1747
b9080b03
FF		 1748 case MANAGER_REBOOT:
1749 case MANAGER_POWEROFF:
1750 case MANAGER_HALT:
1751 case MANAGER_KEXEC: {
1752 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1753 [MANAGER_REBOOT] = "reboot",
1754 [MANAGER_POWEROFF] = "poweroff",
1755 [MANAGER_HALT] = "halt",
1756 [MANAGER_KEXEC] = "kexec"
1757 };
1758
1759 assert_se(shutdown_verb = table[m->exit_code]);
e96d6be7 1760 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
b9080b03
FF		 1761
1762 log_notice("Shutting down.");
1763 goto finish;
1764 }
1765
a16e1123
LP		 1766 default:
1767 assert_not_reached("Unknown exit code.");
1768 }
1769 }
f170852a 1770
60918275
LP		 1771finish:
1772 if (m)
1773 manager_free(m);
1774
c93ff2e9 1775 for (j = 0; j < RLIMIT_NLIMITS; j++)
4096d6f5 1776 free(arg_default_rlimit[j]);
c93ff2e9 1777
fa0f4d8a 1778 free(arg_default_unit);
0c85a4f3 1779 free_join_controllers();
b9cd2ec1 1780
ea430986 1781 dbus_shutdown();
b2bb3dbe
LP		 1782 label_finish();
1783
a16e1123 1784 if (reexecute) {
664f88a7 1785 const char **args;
e564a982 1786 unsigned i, args_size;
a16e1123 1787
664f88a7
LP		 1788 /* Close and disarm the watchdog, so that the new
1789 * instance can reinitialize it, but doesn't get
1790 * rebooted while we do that */
1791 watchdog_close(true);
a16e1123 1792
4096d6f5
LP		 1793 /* Reset the RLIMIT_NOFILE to the kernel default, so
1794 * that the new systemd can pass the kernel default to
1795 * its child processes */
1796 if (saved_rlimit_nofile.rlim_cur > 0)
1797 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1798
41669317 1799 if (switch_root_dir) {
cee530bb
LP		 1800 /* Kill all remaining processes from the
1801 * initrd, but don't wait for them, so that we
1802 * can handle the SIGCHLD for them after
1803 * deserializing. */
1804 broadcast_signal(SIGTERM, false);
bd3fa1d2
LP		 1805
1806 /* And switch root */
41669317
LP		 1807 r = switch_root(switch_root_dir);
1808 if (r < 0)
1809 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1810 }
a16e1123 1811
d03bc1b8 1812 args_size = MAX(6, argc+1);
e564a982 1813 args = newa(const char*, args_size);
a16e1123 1814
664f88a7
LP		 1815 if (!switch_root_init) {
1816 char sfd[16];
a16e1123 1817
664f88a7
LP		 1818 /* First try to spawn ourselves with the right
1819 * path, and with full serialization. We do
1820 * this only if the user didn't specify an
1821 * explicit init to spawn. */
edb9aaa8 1822
664f88a7
LP		 1823 assert(serialization);
1824 assert(fds);
edb9aaa8 1825
664f88a7
LP		 1826 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1827 char_array_0(sfd);
edb9aaa8 1828
664f88a7
LP		 1829 i = 0;
1830 args[i++] = SYSTEMD_BINARY_PATH;
41669317 1831 if (switch_root_dir)
2660882b 1832 args[i++] = "--switched-root";
67445f4e 1833 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
664f88a7
LP		 1834 args[i++] = "--deserialize";
1835 args[i++] = sfd;
1836 args[i++] = NULL;
edb9aaa8 1837
e564a982 1838 assert(i <= args_size);
664f88a7
LP		 1839 execv(args[0], (char* const*) args);
1840 }
6e98720f 1841
664f88a7
LP		 1842 /* Try the fallback, if there is any, without any
1843 * serialization. We pass the original argv[] and
1844 * envp[]. (Well, modulo the ordering changes due to
1845 * getopt() in argv[], and some cleanups in envp[],
1846 * but let's hope that doesn't matter.) */
a16e1123 1847
b8f83232 1848 if (serialization) {
664f88a7 1849 fclose(serialization);
b8f83232
LP		 1850 serialization = NULL;
1851 }
a16e1123 1852
b8f83232 1853 if (fds) {
664f88a7 1854 fdset_free(fds);
b8f83232
LP		 1855 fds = NULL;
1856 }
a16e1123 1857
a504223d
HH		 1858 /* Reopen the console */
1859 make_console_stdio();
1860
b8f83232 1861 for (j = 1, i = 1; j < argc; j++)
664f88a7 1862 args[i++] = argv[j];
a16e1123 1863 args[i++] = NULL;
e564a982 1864 assert(i <= args_size);
b8f83232
LP		 1865
1866 if (switch_root_init) {
1867 args[0] = switch_root_init;
1868 execv(args[0], (char* const*) args);
1869 log_warning("Failed to execute configured init, trying fallback: %m");
1870 }
1871
1872 args[0] = "/sbin/init";
a16e1123
LP		 1873 execv(args[0], (char* const*) args);
1874
745e2fb7
KS		 1875 if (errno == ENOENT) {
1876 log_warning("No /sbin/init, trying fallback");
b8f83232 1877
745e2fb7
KS		 1878 args[0] = "/bin/sh";
1879 args[1] = NULL;
1880 execv(args[0], (char* const*) args);
1881 log_error("Failed to execute /bin/sh, giving up: %m");
1882 } else
1883 log_warning("Failed to execute /sbin/init, giving up: %m");
a16e1123
LP		 1884 }
1885
1886 if (serialization)
1887 fclose(serialization);
1888
1889 if (fds)
1890 fdset_free(fds);
1891
b9080b03
FF		 1892 if (shutdown_verb) {
1893 const char * command_line[] = {
1894 SYSTEMD_SHUTDOWN_BINARY_PATH,
1895 shutdown_verb,
1896 NULL
1897 };
d18f337c 1898 char **env_block;
b9080b03 1899
e96d6be7 1900 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
d18f337c
LP		 1901 char e[32];
1902
e96d6be7
LP		 1903 /* If we reboot let's set the shutdown
1904 * watchdog and tell the shutdown binary to
1905 * repeatedly ping it */
1906 watchdog_set_timeout(&arg_shutdown_watchdog);
1907 watchdog_close(false);
1908
1909 /* Tell the binary how often to ping */
1910 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1911 char_array_0(e);
d18f337c
LP		 1912
1913 env_block = strv_append(environ, e);
1914 } else {
1915 env_block = strv_copy(environ);
e96d6be7 1916 watchdog_close(true);
d18f337c 1917 }
e96d6be7 1918
66713f77
LP		 1919 /* Avoid the creation of new processes forked by the
1920 * kernel; at this point, we will not listen to the
1921 * signals anyway */
1922 if (detect_container(NULL) <= 0)
1923 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
ad929bcc 1924
d18f337c
LP		 1925 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1926 free(env_block);
b9080b03
FF		 1927 log_error("Failed to execute shutdown binary, freezing: %m");
1928 }
1929
c3b3c274
LP		 1930 if (getpid() == 1)
1931 freeze();
1932
60918275
LP		 1933 return retval;
1934}
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