]> git.ipfire.org Git - thirdparty/systemd.git/blame - src/core/main.c
projects / thirdparty / systemd.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
core: s/reexection/reexecution/ typo fix
[thirdparty/systemd.git] / src / core / main.c
CommitLineData
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
60918275
LP		 22#include <stdio.h>
23#include <errno.h>
24#include <string.h>
16354eff 25#include <unistd.h>
4ade7963 26#include <sys/stat.h>
f170852a 27#include <getopt.h>
97c4f35c 28#include <signal.h>
80876c20 29#include <fcntl.h>
f3b6a3ed 30#include <sys/prctl.h>
664f88a7 31#include <sys/mount.h>
60918275 32
54b434b1
LP		 33#ifdef HAVE_VALGRIND_VALGRIND_H
34#include <valgrind/valgrind.h>
35#endif
b64a3d86
LP		 36#ifdef HAVE_SECCOMP
37#include <seccomp.h>
38#endif
54b434b1 39
718db961 40#include "sd-daemon.h"
718db961 41#include "sd-bus.h"
16354eff 42#include "log.h"
a16e1123 43#include "fdset.h"
514f4ef5 44#include "special.h"
487393e9 45#include "conf-parser.h"
ad780f19 46#include "missing.h"
b87c2aa6 47#include "pager.h"
302e27c8 48#include "build.h"
06d4c99a 49#include "strv.h"
f6a6225e 50#include "def.h"
b52aae1d 51#include "virt.h"
d9d93745 52#include "architecture.h"
e96d6be7 53#include "watchdog.h"
41669317 54#include "switch-root.h"
ec8927ca 55#include "capability.h"
bd3fa1d2 56#include "killall.h"
0c4025d1 57#include "env-util.h"
24efb112 58#include "clock-util.h"
718db961 59#include "fileio.h"
718db961
LP		 60#include "bus-error.h"
61#include "bus-util.h"
d7b8eec7 62#include "selinux-util.h"
24882e06
LP		 63#include "formats-util.h"
64#include "process-util.h"
65#include "terminal-util.h"
66#include "signal-util.h"
d7b8eec7
LP		 67#include "manager.h"
68#include "dbus-manager.h"
69#include "load-fragment.h"
60918275 70
b6e66135
LP		 71#include "mount-setup.h"
72#include "loopback-setup.h"
b6e66135
LP		 73#include "hostname-setup.h"
74#include "machine-id-setup.h"
b6e66135
LP		 75#include "selinux-setup.h"
76#include "ima-setup.h"
ffbd2c4d 77#include "smack-setup.h"
718db961 78#include "kmod-setup.h"
b6e66135 79
f170852a
LP		 80static enum {
81 ACTION_RUN,
e965d56d 82 ACTION_HELP,
9ba0bc4e 83 ACTION_VERSION,
e537352b 84 ACTION_TEST,
4288f619
LP		 85 ACTION_DUMP_CONFIGURATION_ITEMS,
86 ACTION_DONE
fa0f4d8a 87} arg_action = ACTION_RUN;
fa0f4d8a 88static char *arg_default_unit = NULL;
b2c23da8 89static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
fa0f4d8a
LP		 90static bool arg_dump_core = true;
91static bool arg_crash_shell = false;
92static int arg_crash_chvt = -1;
93static bool arg_confirm_spawn = false;
b6e2f329 94static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
bf4df7c3 95static bool arg_switched_root = false;
b87c2aa6 96static int arg_no_pager = -1;
0c85a4f3 97static char ***arg_join_controllers = NULL;
706343f4 98static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
0a494f1f 99static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
1f19a534
OS		 100static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
101static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
102static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
3f41e1e5
LN		 103static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
104static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
e96d6be7
LP		 105static usec_t arg_runtime_watchdog = 0;
106static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
97d0e5f8 107static char **arg_default_environment = NULL;
517d56b1 108static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
ec8927ca 109static uint64_t arg_capability_bounding_set_drop = 0;
3a43da28 110static nsec_t arg_timer_slack_nsec = NSEC_INFINITY;
bd8f585b 111static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
d3b1c508
LP		 112static Set* arg_syscall_archs = NULL;
113static FILE* arg_serialization = NULL;
085afe36
LP		 114static bool arg_default_cpu_accounting = false;
115static bool arg_default_blockio_accounting = false;
116static bool arg_default_memory_accounting = false;
4fc935ca 117
d3b1c508 118static void nop_handler(int sig) {}
6f5e3f35 119
b87c2aa6
ZJS		 120static void pager_open_if_enabled(void) {
121
122 if (arg_no_pager <= 0)
123 return;
124
125 pager_open(false);
126}
127
919ce0b7 128noreturn static void crash(int sig) {
97c4f35c 129
abb26902
LP		 130 if (getpid() != 1)
131 /* Pass this on immediately, if this is not PID 1 */
132 raise(sig);
133 else if (!arg_dump_core)
4104970e 134 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig));
97c4f35c 135 else {
b92bea5d
ZJS		 136 struct sigaction sa = {
137 .sa_handler = nop_handler,
138 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
139 };
97c4f35c
LP		 140 pid_t pid;
141
6f5e3f35 142 /* We want to wait for the core process, hence let's enable SIGCHLD */
abb26902 143 sigaction(SIGCHLD, &sa, NULL);
6f5e3f35 144
ee05e779 145 pid = raw_clone(SIGCHLD, NULL);
e62d8c39 146 if (pid < 0)
56f64d95 147 log_emergency_errno(errno, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
97c4f35c
LP		 148
149 else if (pid == 0) {
b92bea5d 150 struct rlimit rl = {};
97c4f35c
LP		 151
152 /* Enable default signal handler for core dump */
153 zero(sa);
154 sa.sa_handler = SIG_DFL;
abb26902 155 sigaction(sig, &sa, NULL);
97c4f35c
LP		 156
157 /* Don't limit the core dump size */
97c4f35c
LP		 158 rl.rlim_cur = RLIM_INFINITY;
159 rl.rlim_max = RLIM_INFINITY;
160 setrlimit(RLIMIT_CORE, &rl);
161
162 /* Just to be sure... */
e62d9b81 163 (void) chdir("/");
97c4f35c
LP		 164
165 /* Raise the signal again */
ee05e779
ZJS		 166 pid = raw_getpid();
167 kill(pid, sig); /* raise() would kill the parent */
97c4f35c
LP		 168
169 assert_not_reached("We shouldn't be here...");
170 _exit(1);
4fc935ca 171 } else {
8e12a6ae
LP		 172 siginfo_t status;
173 int r;
4fc935ca
LP		 174
175 /* Order things nicely. */
e62d8c39
ZJS		 176 r = wait_for_terminate(pid, &status);
177 if (r < 0)
da927ba9 178 log_emergency_errno(r, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig));
8e12a6ae 179 else if (status.si_code != CLD_DUMPED)
ee05e779
ZJS		 180 log_emergency("Caught <%s>, core dump failed (child "PID_FMT", code=%s, status=%i/%s).",
181 signal_to_string(sig),
182 pid, sigchld_code_to_string(status.si_code),
183 status.si_status,
184 strna(status.si_code == CLD_EXITED
185 ? exit_status_to_string(status.si_status, EXIT_STATUS_FULL)
186 : signal_to_string(status.si_status)));
4fc935ca 187 else
4104970e 188 log_emergency("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
97c4f35c
LP		 189 }
190 }
191
fa0f4d8a
LP		 192 if (arg_crash_chvt)
193 chvt(arg_crash_chvt);
601f6a1e 194
fa0f4d8a 195 if (arg_crash_shell) {
b92bea5d
ZJS		 196 struct sigaction sa = {
197 .sa_handler = SIG_IGN,
198 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
199 };
6f5e3f35 200 pid_t pid;
8c43883a 201
4fc935ca
LP		 202 log_info("Executing crash shell in 10s...");
203 sleep(10);
204
6f5e3f35 205 /* Let the kernel reap children for us */
6f5e3f35 206 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
8c43883a 207
ee05e779 208 pid = raw_clone(SIGCHLD, NULL);
cd3bd60a 209 if (pid < 0)
56f64d95 210 log_emergency_errno(errno, "Failed to fork off crash shell: %m");
6f5e3f35 211 else if (pid == 0) {
cd3bd60a 212 make_console_stdio();
ee05e779 213 execle("/bin/sh", "/bin/sh", NULL, environ);
6f5e3f35 214
ee05e779 215 log_emergency_errno(errno, "execle() failed: %m");
6f5e3f35 216 _exit(1);
ee05e779
ZJS		 217 } else
218 log_info("Successfully spawned crash shell as PID "PID_FMT".", pid);
4fc935ca
LP		 219 }
220
4104970e 221 log_emergency("Freezing execution.");
97c4f35c
LP		 222 freeze();
223}
224
225static void install_crash_handler(void) {
297d563d 226 static const struct sigaction sa = {
b92bea5d 227 .sa_handler = crash,
297d563d 228 .sa_flags = SA_NODEFER, /* So that we can raise the signal again from the signal handler */
b92bea5d 229 };
297d563d 230 int r;
97c4f35c 231
297d563d
LP		 232 /* We ignore the return value here, since, we don't mind if we
233 * cannot set up a crash handler */
234 r = sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
235 if (r < 0)
236 log_debug_errno(r, "I had trouble setting up the crash handler, ignoring: %m");
97c4f35c 237}
f170852a 238
56d96fc0
LP		 239static int console_setup(void) {
240 _cleanup_close_ int tty_fd = -1;
241 int r;
80876c20 242
512947d4 243 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
23bbb0de
MS		 244 if (tty_fd < 0)
245 return log_error_errno(tty_fd, "Failed to open /dev/console: %m");
80876c20 246
56d96fc0
LP		 247 /* We don't want to force text mode. plymouth may be showing
248 * pictures already from initrd. */
512947d4 249 r = reset_terminal_fd(tty_fd, false);
23bbb0de
MS		 250 if (r < 0)
251 return log_error_errno(r, "Failed to reset /dev/console: %m");
843d2643 252
56d96fc0 253 return 0;
80876c20
LP		 254}
255
f170852a
LP		 256static int set_default_unit(const char *u) {
257 char *c;
258
259 assert(u);
260
bf4df7c3
LP		 261 c = strdup(u);
262 if (!c)
f170852a
LP		 263 return -ENOMEM;
264
fa0f4d8a
LP		 265 free(arg_default_unit);
266 arg_default_unit = c;
bf4df7c3 267
f170852a
LP		 268 return 0;
269}
270
059cb385 271static int parse_proc_cmdline_item(const char *key, const char *value) {
f170852a
LP		 272
273 static const char * const rlmap[] = {
ed370f5d 274 "emergency", SPECIAL_EMERGENCY_TARGET,
099663ff 275 "-b", SPECIAL_EMERGENCY_TARGET,
5329ab10 276 "rescue", SPECIAL_RESCUE_TARGET,
ed370f5d
LP		 277 "single", SPECIAL_RESCUE_TARGET,
278 "-s", SPECIAL_RESCUE_TARGET,
279 "s", SPECIAL_RESCUE_TARGET,
280 "S", SPECIAL_RESCUE_TARGET,
281 "1", SPECIAL_RESCUE_TARGET,
d5d8429a
LP		 282 "2", SPECIAL_MULTI_USER_TARGET,
283 "3", SPECIAL_MULTI_USER_TARGET,
284 "4", SPECIAL_MULTI_USER_TARGET,
285 "5", SPECIAL_GRAPHICAL_TARGET,
f170852a 286 };
059cb385 287 int r;
f170852a 288
059cb385 289 assert(key);
5192bd19 290
059cb385 291 if (streq(key, "systemd.unit") && value) {
bf4df7c3
LP		 292
293 if (!in_initrd())
059cb385 294 return set_default_unit(value);
bf4df7c3 295
059cb385 296 } else if (streq(key, "rd.systemd.unit") && value) {
bf4df7c3 297
ca05941b
LP		 298 if (in_initrd())
299 return set_default_unit(value);
f170852a 300
059cb385 301 } else if (streq(key, "systemd.dump_core") && value) {
4fc935ca 302
059cb385 303 r = parse_boolean(value);
fb472900 304 if (r < 0)
059cb385 305 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
4fc935ca 306 else
fa0f4d8a 307 arg_dump_core = r;
4fc935ca 308
059cb385 309 } else if (streq(key, "systemd.crash_shell") && value) {
4fc935ca 310
059cb385 311 r = parse_boolean(value);
fb472900 312 if (r < 0)
059cb385 313 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
4fc935ca 314 else
fa0f4d8a 315 arg_crash_shell = r;
5e7ee61c 316
059cb385 317 } else if (streq(key, "systemd.crash_chvt") && value) {
5e7ee61c 318
059cb385
LP		 319 if (safe_atoi(value, &r) < 0)
320 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
5e7ee61c 321 else
059cb385 322 arg_crash_chvt = r;
5e7ee61c 323
059cb385 324 } else if (streq(key, "systemd.confirm_spawn") && value) {
601f6a1e 325
059cb385
LP		 326 r = parse_boolean(value);
327 if (r < 0)
328 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
601f6a1e 329 else
059cb385 330 arg_confirm_spawn = r;
601f6a1e 331
059cb385 332 } else if (streq(key, "systemd.show_status") && value) {
9e58ff9c 333
059cb385 334 r = parse_show_status(value, &arg_show_status);
d450b6f2 335 if (r < 0)
059cb385
LP		 336 log_warning("Failed to parse show status switch %s. Ignoring.", value);
337
338 } else if (streq(key, "systemd.default_standard_output") && value) {
0a494f1f 339
059cb385 340 r = exec_output_from_string(value);
fb472900 341 if (r < 0)
059cb385 342 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
0a494f1f
LP		 343 else
344 arg_default_std_output = r;
0a494f1f 345
059cb385
LP		 346 } else if (streq(key, "systemd.default_standard_error") && value) {
347
348 r = exec_output_from_string(value);
fb472900 349 if (r < 0)
059cb385 350 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
0a494f1f
LP		 351 else
352 arg_default_std_error = r;
9e7c5357 353
059cb385
LP		 354 } else if (streq(key, "systemd.setenv") && value) {
355
356 if (env_assignment_is_valid(value)) {
e21fea24
KS		 357 char **env;
358
059cb385 359 env = strv_env_set(arg_default_environment, value);
e21fea24
KS		 360 if (env)
361 arg_default_environment = env;
362 else
279d3c9c 363 log_warning_errno(ENOMEM, "Setting environment variable '%s' failed, ignoring: %m", value);
e21fea24 364 } else
059cb385 365 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
9e58ff9c 366
059cb385 367 } else if (streq(key, "quiet") && !value) {
d7b15e0a 368
b6e2f329 369 if (arg_show_status == _SHOW_STATUS_UNSET)
d450b6f2 370 arg_show_status = SHOW_STATUS_AUTO;
059cb385
LP		 371
372 } else if (streq(key, "debug") && !value) {
d7b15e0a 373
1de1c9c3
LP		 374 /* Note that log_parse_environment() handles 'debug'
375 * too, and sets the log level to LOG_DEBUG. */
d7b15e0a 376
b2103dcc
KS		 377 if (detect_container(NULL) > 0)
378 log_set_target(LOG_TARGET_CONSOLE);
059cb385
LP		 379
380 } else if (!in_initrd() && !value) {
f170852a
LP		 381 unsigned i;
382
383 /* SysV compatibility */
f170852a 384 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
059cb385 385 if (streq(key, rlmap[i]))
f170852a
LP		 386 return set_default_unit(rlmap[i+1]);
387 }
388
389 return 0;
390}
391
e8e581bf
ZJS		 392#define DEFINE_SETTER(name, func, descr) \
393 static int name(const char *unit, \
394 const char *filename, \
395 unsigned line, \
396 const char *section, \
71a61510 397 unsigned section_line, \
e8e581bf
ZJS		 398 const char *lvalue, \
399 int ltype, \
400 const char *rvalue, \
401 void *data, \
402 void *userdata) { \
403 \
404 int r; \
405 \
406 assert(filename); \
407 assert(lvalue); \
408 assert(rvalue); \
409 \
410 r = func(rvalue); \
411 if (r < 0) \
412 log_syntax(unit, LOG_ERR, filename, line, -r, \
413 "Invalid " descr "'%s': %s", \
414 rvalue, strerror(-r)); \
415 \
416 return 0; \
417 }
487393e9 418
e8e581bf
ZJS		 419DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
420DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
421DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
422DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
487393e9 423
4d7213b2
LP		 424static int config_parse_cpu_affinity2(
425 const char *unit,
426 const char *filename,
427 unsigned line,
428 const char *section,
429 unsigned section_line,
430 const char *lvalue,
431 int ltype,
432 const char *rvalue,
433 void *data,
434 void *userdata) {
487393e9 435
a2a5291b 436 const char *word, *state;
487393e9 437 size_t l;
487393e9
LP		 438 cpu_set_t *c = NULL;
439 unsigned ncpus = 0;
440
441 assert(filename);
442 assert(lvalue);
443 assert(rvalue);
444
a2a5291b 445 FOREACH_WORD_QUOTED(word, l, rvalue, state) {
487393e9
LP		 446 char *t;
447 int r;
448 unsigned cpu;
449
a2a5291b 450 if (!(t = strndup(word, l)))
14212119 451 return log_oom();
487393e9
LP		 452
453 r = safe_atou(t, &cpu);
454 free(t);
455
456 if (!c)
457 if (!(c = cpu_set_malloc(&ncpus)))
14212119 458 return log_oom();
487393e9
LP		 459
460 if (r < 0 || cpu >= ncpus) {
e8e581bf
ZJS		 461 log_syntax(unit, LOG_ERR, filename, line, -r,
462 "Failed to parse CPU affinity '%s'", rvalue);
487393e9
LP		 463 CPU_FREE(c);
464 return -EBADMSG;
465 }
466
467 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
468 }
b2fadec6
ZJS		 469 if (!isempty(state))
470 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
471 "Trailing garbage, ignoring.");
487393e9
LP		 472
473 if (c) {
474 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
f2341e0a 475 log_warning("Failed to set CPU affinity: %m");
487393e9
LP		 476
477 CPU_FREE(c);
478 }
479
480 return 0;
481}
482
4d7213b2
LP		 483static int config_parse_show_status(
484 const char* unit,
485 const char *filename,
486 unsigned line,
487 const char *section,
488 unsigned section_line,
489 const char *lvalue,
490 int ltype,
491 const char *rvalue,
492 void *data,
493 void *userdata) {
494
495 int k;
496 ShowStatus *b = data;
497
498 assert(filename);
499 assert(lvalue);
500 assert(rvalue);
501 assert(data);
502
503 k = parse_show_status(rvalue, b);
504 if (k < 0) {
505 log_syntax(unit, LOG_ERR, filename, line, -k,
506 "Failed to parse show status setting, ignoring: %s", rvalue);
507 return 0;
508 }
509
510 return 0;
511}
512
0c85a4f3
LP		 513static void strv_free_free(char ***l) {
514 char ***i;
515
516 if (!l)
517 return;
518
519 for (i = l; *i; i++)
520 strv_free(*i);
521
522 free(l);
523}
524
525static void free_join_controllers(void) {
0c85a4f3
LP		 526 strv_free_free(arg_join_controllers);
527 arg_join_controllers = NULL;
528}
529
e8e581bf
ZJS		 530static int config_parse_join_controllers(const char *unit,
531 const char *filename,
532 unsigned line,
533 const char *section,
71a61510 534 unsigned section_line,
e8e581bf
ZJS		 535 const char *lvalue,
536 int ltype,
537 const char *rvalue,
538 void *data,
539 void *userdata) {
0c85a4f3
LP		 540
541 unsigned n = 0;
a2a5291b 542 const char *word, *state;
0c85a4f3
LP		 543 size_t length;
544
545 assert(filename);
546 assert(lvalue);
547 assert(rvalue);
548
549 free_join_controllers();
550
a2a5291b 551 FOREACH_WORD_QUOTED(word, length, rvalue, state) {
0c85a4f3
LP		 552 char *s, **l;
553
a2a5291b 554 s = strndup(word, length);
0c85a4f3 555 if (!s)
14212119 556 return log_oom();
0c85a4f3
LP		 557
558 l = strv_split(s, ",");
559 free(s);
560
561 strv_uniq(l);
562
563 if (strv_length(l) <= 1) {
564 strv_free(l);
565 continue;
566 }
567
568 if (!arg_join_controllers) {
569 arg_join_controllers = new(char**, 2);
570 if (!arg_join_controllers) {
571 strv_free(l);
14212119 572 return log_oom();
0c85a4f3
LP		 573 }
574
575 arg_join_controllers[0] = l;
576 arg_join_controllers[1] = NULL;
577
578 n = 1;
579 } else {
580 char ***a;
581 char ***t;
582
583 t = new0(char**, n+2);
584 if (!t) {
585 strv_free(l);
14212119 586 return log_oom();
0c85a4f3
LP		 587 }
588
589 n = 0;
590
591 for (a = arg_join_controllers; *a; a++) {
592
593 if (strv_overlap(*a, l)) {
e3e45d4f 594 if (strv_extend_strv(&l, *a) < 0) {
0c85a4f3
LP		 595 strv_free(l);
596 strv_free_free(t);
14212119 597 return log_oom();
0c85a4f3
LP		 598 }
599
0c85a4f3
LP		 600 } else {
601 char **c;
602
603 c = strv_copy(*a);
604 if (!c) {
605 strv_free(l);
606 strv_free_free(t);
14212119 607 return log_oom();
0c85a4f3
LP		 608 }
609
610 t[n++] = c;
611 }
612 }
613
614 t[n++] = strv_uniq(l);
615
616 strv_free_free(arg_join_controllers);
617 arg_join_controllers = t;
618 }
619 }
b2fadec6
ZJS		 620 if (!isempty(state))
621 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
622 "Trailing garbage, ignoring.");
0c85a4f3
LP		 623
624 return 0;
625}
626
487393e9
LP		 627static int parse_config_file(void) {
628
f975e971 629 const ConfigTableItem items[] = {
d3b1c508
LP		 630 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
631 { "Manager", "LogTarget", config_parse_target, 0, NULL },
632 { "Manager", "LogColor", config_parse_color, 0, NULL },
633 { "Manager", "LogLocation", config_parse_location, 0, NULL },
634 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
635 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
636 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
637 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
638 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
639 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
640 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
641 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
642 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
89fffa27 643#ifdef HAVE_SECCOMP
d3b1c508 644 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
89fffa27 645#endif
d3b1c508 646 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
bd8f585b 647 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
d3b1c508
LP		 648 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
649 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
650 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
651 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
652 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
653 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
654 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
655 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
656 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
657 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
658 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
659 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
660 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
661 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
662 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
663 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
664 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
665 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
666 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
667 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
668 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
669 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
670 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
671 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
085afe36
LP		 672 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
673 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
674 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
d3b1c508 675 {}
487393e9
LP		 676 };
677
1b907b5c 678 const char *fn, *conf_dirs_nulstr;
487393e9 679
b2c23da8
LP		 680 fn = arg_running_as == MANAGER_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
681 conf_dirs_nulstr = arg_running_as == MANAGER_SYSTEM ? CONF_DIRS_NULSTR("systemd/system.conf") : CONF_DIRS_NULSTR("systemd/user.conf");
1b907b5c
JT		 682 config_parse_many(fn, conf_dirs_nulstr, "Manager\0",
683 config_item_table_lookup, items, false, NULL);
487393e9 684
487393e9
LP		 685 return 0;
686}
687
06af2a04
TB		 688static void manager_set_defaults(Manager *m) {
689
690 assert(m);
691
692 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
693 m->default_std_output = arg_default_std_output;
694 m->default_std_error = arg_default_std_error;
695 m->default_timeout_start_usec = arg_default_timeout_start_usec;
696 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
697 m->default_restart_usec = arg_default_restart_usec;
698 m->default_start_limit_interval = arg_default_start_limit_interval;
699 m->default_start_limit_burst = arg_default_start_limit_burst;
700 m->default_cpu_accounting = arg_default_cpu_accounting;
701 m->default_blockio_accounting = arg_default_blockio_accounting;
702 m->default_memory_accounting = arg_default_memory_accounting;
703
704 manager_set_default_rlimits(m, arg_default_rlimit);
705 manager_environment_add(m, NULL, arg_default_environment);
706}
707
f170852a
LP		 708static int parse_argv(int argc, char *argv[]) {
709
710 enum {
711 ARG_LOG_LEVEL = 0x100,
712 ARG_LOG_TARGET,
bbe63281
LP		 713 ARG_LOG_COLOR,
714 ARG_LOG_LOCATION,
2f198e2f 715 ARG_UNIT,
edb9aaa8 716 ARG_SYSTEM,
af2d49f7 717 ARG_USER,
e537352b 718 ARG_TEST,
b87c2aa6 719 ARG_NO_PAGER,
9ba0bc4e 720 ARG_VERSION,
80876c20 721 ARG_DUMP_CONFIGURATION_ITEMS,
9e58ff9c
LP		 722 ARG_DUMP_CORE,
723 ARG_CRASH_SHELL,
a16e1123 724 ARG_CONFIRM_SPAWN,
9e58ff9c 725 ARG_SHOW_STATUS,
4288f619 726 ARG_DESERIALIZE,
2660882b 727 ARG_SWITCHED_ROOT,
0a494f1f
LP		 728 ARG_DEFAULT_STD_OUTPUT,
729 ARG_DEFAULT_STD_ERROR
f170852a
LP		 730 };
731
732 static const struct option options[] = {
a16e1123
LP		 733 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
734 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
bbe63281
LP		 735 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
736 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
2f198e2f 737 { "unit", required_argument, NULL, ARG_UNIT },
edb9aaa8 738 { "system", no_argument, NULL, ARG_SYSTEM },
af2d49f7 739 { "user", no_argument, NULL, ARG_USER },
a16e1123 740 { "test", no_argument, NULL, ARG_TEST },
b87c2aa6 741 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
a16e1123 742 { "help", no_argument, NULL, 'h' },
9ba0bc4e 743 { "version", no_argument, NULL, ARG_VERSION },
a16e1123 744 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
a5d87bf0
LP		 745 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
746 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
747 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
6e98720f 748 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
a16e1123 749 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
2660882b 750 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
0a494f1f
LP		 751 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
752 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
fb472900 753 {}
f170852a
LP		 754 };
755
756 int c, r;
757
758 assert(argc >= 1);
759 assert(argv);
760
b770165a
LP		 761 if (getpid() == 1)
762 opterr = 0;
763
099663ff 764 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
f170852a
LP		 765
766 switch (c) {
767
768 case ARG_LOG_LEVEL:
fb472900
ZJS		 769 r = log_set_max_level_from_string(optarg);
770 if (r < 0) {
f170852a
LP		 771 log_error("Failed to parse log level %s.", optarg);
772 return r;
773 }
774
775 break;
776
777 case ARG_LOG_TARGET:
fb472900
ZJS		 778 r = log_set_target_from_string(optarg);
779 if (r < 0) {
f170852a
LP		 780 log_error("Failed to parse log target %s.", optarg);
781 return r;
782 }
783
784 break;
785
bbe63281
LP		 786 case ARG_LOG_COLOR:
787
d0b170c8 788 if (optarg) {
fb472900
ZJS		 789 r = log_show_color_from_string(optarg);
790 if (r < 0) {
d0b170c8
LP		 791 log_error("Failed to parse log color setting %s.", optarg);
792 return r;
793 }
794 } else
795 log_show_color(true);
bbe63281
LP		 796
797 break;
798
799 case ARG_LOG_LOCATION:
d0b170c8 800 if (optarg) {
fb472900
ZJS		 801 r = log_show_location_from_string(optarg);
802 if (r < 0) {
d0b170c8
LP		 803 log_error("Failed to parse log location setting %s.", optarg);
804 return r;
805 }
806 } else
807 log_show_location(true);
bbe63281
LP		 808
809 break;
810
0a494f1f 811 case ARG_DEFAULT_STD_OUTPUT:
fb472900
ZJS		 812 r = exec_output_from_string(optarg);
813 if (r < 0) {
0a494f1f
LP		 814 log_error("Failed to parse default standard output setting %s.", optarg);
815 return r;
816 } else
817 arg_default_std_output = r;
818 break;
819
820 case ARG_DEFAULT_STD_ERROR:
fb472900
ZJS		 821 r = exec_output_from_string(optarg);
822 if (r < 0) {
0a494f1f
LP		 823 log_error("Failed to parse default standard error output setting %s.", optarg);
824 return r;
825 } else
826 arg_default_std_error = r;
827 break;
828
2f198e2f 829 case ARG_UNIT:
f170852a 830
fb472900 831 r = set_default_unit(optarg);
23bbb0de
MS		 832 if (r < 0)
833 return log_error_errno(r, "Failed to set default unit %s: %m", optarg);
f170852a
LP		 834
835 break;
836
edb9aaa8 837 case ARG_SYSTEM:
b2c23da8 838 arg_running_as = MANAGER_SYSTEM;
edb9aaa8 839 break;
a5dab5ce 840
af2d49f7 841 case ARG_USER:
b2c23da8 842 arg_running_as = MANAGER_USER;
a5dab5ce 843 break;
a5dab5ce 844
e965d56d 845 case ARG_TEST:
fa0f4d8a 846 arg_action = ACTION_TEST;
b87c2aa6
ZJS		 847 if (arg_no_pager < 0)
848 arg_no_pager = true;
849 break;
850
851 case ARG_NO_PAGER:
852 arg_no_pager = true;
e965d56d
LP		 853 break;
854
9ba0bc4e
ZJS		 855 case ARG_VERSION:
856 arg_action = ACTION_VERSION;
857 break;
858
e537352b 859 case ARG_DUMP_CONFIGURATION_ITEMS:
fa0f4d8a 860 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
e537352b
LP		 861 break;
862
9e58ff9c 863 case ARG_DUMP_CORE:
a5d87bf0
LP		 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;
9e58ff9c
LP		 870 break;
871
872 case ARG_CRASH_SHELL:
a5d87bf0
LP		 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;
9e58ff9c
LP		 879 break;
880
80876c20 881 case ARG_CONFIRM_SPAWN:
a5d87bf0
LP		 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;
80876c20
LP		 888 break;
889
9e58ff9c 890 case ARG_SHOW_STATUS:
d450b6f2
ZJS		 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;
6e98720f 899 break;
a5d87bf0 900
a16e1123
LP		 901 case ARG_DESERIALIZE: {
902 int fd;
903 FILE *f;
904
01e10de3
LP		 905 r = safe_atoi(optarg, &fd);
906 if (r < 0 || fd < 0) {
a16e1123 907 log_error("Failed to parse deserialize option %s.", optarg);
01e10de3 908 return r < 0 ? r : -EINVAL;
a16e1123
LP		 909 }
910
01e10de3
LP		 911 fd_cloexec(fd, true);
912
913 f = fdopen(fd, "r");
4a62c710
MS		 914 if (!f)
915 return log_error_errno(errno, "Failed to open serialization fd: %m");
a16e1123 916
d3b1c508
LP		 917 if (arg_serialization)
918 fclose(arg_serialization);
a16e1123 919
d3b1c508 920 arg_serialization = f;
a16e1123
LP		 921
922 break;
923 }
924
2660882b 925 case ARG_SWITCHED_ROOT:
bf4df7c3 926 arg_switched_root = true;
d03bc1b8
HH		 927 break;
928
f170852a 929 case 'h':
fa0f4d8a 930 arg_action = ACTION_HELP;
b87c2aa6
ZJS		 931 if (arg_no_pager < 0)
932 arg_no_pager = true;
f170852a
LP		 933 break;
934
1d2e23ab
LP		 935 case 'D':
936 log_set_max_level(LOG_DEBUG);
937 break;
938
099663ff
LP		 939 case 'b':
940 case 's':
941 case 'z':
942 /* Just to eat away the sysvinit kernel
943 * cmdline args without getopt() error
944 * messages that we'll parse in
945 * parse_proc_cmdline_word() or ignore. */
f170852a 946
099663ff 947 case '?':
601185b4 948 if (getpid() != 1)
099663ff 949 return -EINVAL;
601185b4
ZJS		 950 else
951 return 0;
099663ff 952
601185b4
ZJS		 953 default:
954 assert_not_reached("Unhandled option code.");
f170852a
LP		 955 }
956
d821e6d6
LP		 957 if (optind < argc && getpid() != 1) {
958 /* Hmm, when we aren't run as init system
959 * let's complain about excess arguments */
960
961 log_error("Excess arguments.");
962 return -EINVAL;
963 }
964
f170852a
LP		 965 return 0;
966}
967
968static int help(void) {
969
2e33c433 970 printf("%s [OPTIONS...]\n\n"
af2d49f7 971 "Starts up and maintains the system or user services.\n\n"
e537352b 972 " -h --help Show this help\n"
e537352b 973 " --test Determine startup sequence, dump it and exit\n"
b87c2aa6 974 " --no-pager Do not pipe output into a pager\n"
80876c20 975 " --dump-configuration-items Dump understood unit configuration items\n"
9e58ff9c 976 " --unit=UNIT Set default unit\n"
edb9aaa8 977 " --system Run a system instance, even if PID != 1\n"
af2d49f7 978 " --user Run a user instance\n"
a5d87bf0
LP		 979 " --dump-core[=0|1] Dump core on crash\n"
980 " --crash-shell[=0|1] Run shell on crash\n"
981 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
6e98720f 982 " --show-status[=0|1] Show status updates on the console during bootup\n"
c1dc6153 983 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
9e58ff9c 984 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
2218198b 985 " --log-color[=0|1] Highlight important log messages\n"
0a494f1f
LP		 986 " --log-location[=0|1] Include code location in log messages\n"
987 " --default-standard-output= Set default standard output for services\n"
988 " --default-standard-error= Set default standard error output for services\n",
5b6319dc 989 program_invocation_short_name);
f170852a
LP		 990
991 return 0;
992}
993
9ba0bc4e
ZJS		 994static int version(void) {
995 puts(PACKAGE_STRING);
9ba0bc4e
ZJS		 996 puts(SYSTEMD_FEATURES);
997
998 return 0;
999}
1000
b3680f49 1001static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
a16e1123
LP		 1002 FILE *f = NULL;
1003 FDSet *fds = NULL;
1004 int r;
1005
1006 assert(m);
1007 assert(_f);
1008 assert(_fds);
1009
6b78f9b4
LP		 1010 r = manager_open_serialization(m, &f);
1011 if (r < 0) {
da927ba9 1012 log_error_errno(r, "Failed to create serialization file: %m");
a16e1123
LP		 1013 goto fail;
1014 }
1015
71445ae7
LP		 1016 /* Make sure nothing is really destructed when we shut down */
1017 m->n_reloading ++;
718db961 1018 bus_manager_send_reloading(m, true);
71445ae7 1019
6b78f9b4
LP		 1020 fds = fdset_new();
1021 if (!fds) {
a16e1123 1022 r = -ENOMEM;
da927ba9 1023 log_error_errno(r, "Failed to allocate fd set: %m");
a16e1123
LP		 1024 goto fail;
1025 }
1026
b3680f49 1027 r = manager_serialize(m, f, fds, switching_root);
6b78f9b4 1028 if (r < 0) {
da927ba9 1029 log_error_errno(r, "Failed to serialize state: %m");
a16e1123
LP		 1030 goto fail;
1031 }
1032
1033 if (fseeko(f, 0, SEEK_SET) < 0) {
56f64d95 1034 log_error_errno(errno, "Failed to rewind serialization fd: %m");
a16e1123
LP		 1035 goto fail;
1036 }
1037
6b78f9b4
LP		 1038 r = fd_cloexec(fileno(f), false);
1039 if (r < 0) {
da927ba9 1040 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m");
a16e1123
LP		 1041 goto fail;
1042 }
1043
6b78f9b4
LP		 1044 r = fdset_cloexec(fds, false);
1045 if (r < 0) {
da927ba9 1046 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m");
a16e1123
LP		 1047 goto fail;
1048 }
1049
1050 *_f = f;
1051 *_fds = fds;
1052
1053 return 0;
1054
1055fail:
1056 fdset_free(fds);
1057
1058 if (f)
1059 fclose(f);
1060
1061 return r;
1062}
1063
4096d6f5
LP		 1064static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1065 struct rlimit nl;
1066 int r;
1067
1068 assert(saved_rlimit);
1069
1070 /* Save the original RLIMIT_NOFILE so that we can reset it
1071 * later when transitioning from the initrd to the main
1072 * systemd or suchlike. */
4a62c710
MS		 1073 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0)
1074 return log_error_errno(errno, "Reading RLIMIT_NOFILE failed: %m");
4096d6f5
LP		 1075
1076 /* Make sure forked processes get the default kernel setting */
1077 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1078 struct rlimit *rl;
1079
1080 rl = newdup(struct rlimit, saved_rlimit, 1);
1081 if (!rl)
1082 return log_oom();
1083
1084 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1085 }
1086
1087 /* Bump up the resource limit for ourselves substantially */
1088 nl.rlim_cur = nl.rlim_max = 64*1024;
1089 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
23bbb0de
MS		 1090 if (r < 0)
1091 return log_error_errno(r, "Setting RLIMIT_NOFILE failed: %m");
4096d6f5
LP		 1092
1093 return 0;
1094}
1095
6ee5bbf8 1096static void test_mtab(void) {
6ee5bbf8 1097
5b4c0131
LP		 1098 static const char ok[] =
1099 "/proc/self/mounts\0"
1100 "/proc/mounts\0"
1101 "../proc/self/mounts\0"
1102 "../proc/mounts\0";
80758717 1103
5b4c0131
LP		 1104 _cleanup_free_ char *p = NULL;
1105 int r;
6ee5bbf8 1106
5b4c0131
LP		 1107 /* Check that /etc/mtab is a symlink to the right place or
1108 * non-existing. But certainly not a file, or a symlink to
1109 * some weird place... */
6ee5bbf8 1110
5b4c0131
LP		 1111 r = readlink_malloc("/etc/mtab", &p);
1112 if (r == -ENOENT)
1113 return;
1114 if (r >= 0 && nulstr_contains(ok, p))
1115 return;
6ee5bbf8 1116
80758717
LP		 1117 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1118 "This is not supported anymore. "
1119 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1120}
1121
1122static void test_usr(void) {
80758717 1123
ed1c99fc 1124 /* Check that /usr is not a separate fs */
80758717 1125
871c44a7
LP		 1126 if (dir_is_empty("/usr") <= 0)
1127 return;
1128
8b173b5e 1129 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
871c44a7
LP		 1130 "Some things will probably break (sometimes even silently) in mysterious ways. "
1131 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1132}
1133
a07fdfa3
LP		 1134static int initialize_join_controllers(void) {
1135 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1136 * + "net_prio". We'd like to add "cpuset" to the mix, but
f131770b 1137 * "cpuset" doesn't really work for groups with no initialized
a07fdfa3
LP		 1138 * attributes. */
1139
1140 arg_join_controllers = new(char**, 3);
1141 if (!arg_join_controllers)
1142 return -ENOMEM;
1143
1144 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
a07fdfa3 1145 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
a6b26d90
ZJS		 1146 arg_join_controllers[2] = NULL;
1147
1148 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1149 free_join_controllers();
a07fdfa3 1150 return -ENOMEM;
a6b26d90 1151 }
a07fdfa3 1152
a07fdfa3
LP		 1153 return 0;
1154}
1155
d3b1c508
LP		 1156static int enforce_syscall_archs(Set *archs) {
1157#ifdef HAVE_SECCOMP
1158 scmp_filter_ctx *seccomp;
1159 Iterator i;
1160 void *id;
1161 int r;
1162
1163 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1164 if (!seccomp)
1165 return log_oom();
1166
1167 SET_FOREACH(id, arg_syscall_archs, i) {
1168 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1169 if (r == -EEXIST)
1170 continue;
1171 if (r < 0) {
da927ba9 1172 log_error_errno(r, "Failed to add architecture to seccomp: %m");
d3b1c508
LP		 1173 goto finish;
1174 }
1175 }
1176
8a8bf3c0
LP		 1177 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1178 if (r < 0) {
da927ba9 1179 log_error_errno(r, "Failed to unset NO_NEW_PRIVS: %m");
8a8bf3c0
LP		 1180 goto finish;
1181 }
1182
d3b1c508
LP		 1183 r = seccomp_load(seccomp);
1184 if (r < 0)
da927ba9 1185 log_error_errno(r, "Failed to add install architecture seccomp: %m");
d3b1c508
LP		 1186
1187finish:
1188 seccomp_release(seccomp);
1189 return r;
1190#else
1191 return 0;
1192#endif
1193}
1194
b6e2f329
LP		 1195static int status_welcome(void) {
1196 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1197 int r;
1198
1199 r = parse_env_file("/etc/os-release", NEWLINE,
1200 "PRETTY_NAME", &pretty_name,
1201 "ANSI_COLOR", &ansi_color,
1202 NULL);
5ae4d543
LP		 1203 if (r == -ENOENT) {
1204 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1205 "PRETTY_NAME", &pretty_name,
1206 "ANSI_COLOR", &ansi_color,
1207 NULL);
1208 }
b6e2f329
LP		 1209
1210 if (r < 0 && r != -ENOENT)
da927ba9 1211 log_warning_errno(r, "Failed to read os-release file: %m");
b6e2f329
LP		 1212
1213 return status_printf(NULL, false, false,
1214 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1215 isempty(ansi_color) ? "1" : ansi_color,
1216 isempty(pretty_name) ? "Linux" : pretty_name);
1217}
1218
fdd25311
LP		 1219static int write_container_id(void) {
1220 const char *c;
1221
1222 c = getenv("container");
1223 if (isempty(c))
1224 return 0;
1225
4c1fc3e4 1226 return write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE);
fdd25311
LP		 1227}
1228
60918275
LP		 1229int main(int argc, char *argv[]) {
1230 Manager *m = NULL;
22f4096c 1231 int r, retval = EXIT_FAILURE;
9d76d730
LP		 1232 usec_t before_startup, after_startup;
1233 char timespan[FORMAT_TIMESPAN_MAX];
a16e1123
LP		 1234 FDSet *fds = NULL;
1235 bool reexecute = false;
b9080b03 1236 const char *shutdown_verb = NULL;
86caf095
LP		 1237 dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL;
1238 dual_timestamp userspace_timestamp = DUAL_TIMESTAMP_NULL;
1239 dual_timestamp kernel_timestamp = DUAL_TIMESTAMP_NULL;
1240 dual_timestamp security_start_timestamp = DUAL_TIMESTAMP_NULL;
1241 dual_timestamp security_finish_timestamp = DUAL_TIMESTAMP_NULL;
5d6b1584 1242 static char systemd[] = "systemd";
2660882b 1243 bool skip_setup = false;
d3b1c508 1244 unsigned j;
0b3325e7 1245 bool loaded_policy = false;
e96d6be7 1246 bool arm_reboot_watchdog = false;
bf4df7c3 1247 bool queue_default_job = false;
5f5c2f38 1248 bool empty_etc = false;
41669317 1249 char *switch_root_dir = NULL, *switch_root_init = NULL;
86caf095 1250 struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0);
cb6531be 1251 const char *error_message = NULL;
27b14a22 1252
058dc6f3 1253#ifdef HAVE_SYSV_COMPAT
2cb1a60d 1254 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
35b8ca3a 1255 /* This is compatibility support for SysV, where
2cb1a60d
LP		 1256 * calling init as a user is identical to telinit. */
1257
1258 errno = -ENOENT;
1259 execv(SYSTEMCTL_BINARY_PATH, argv);
56f64d95 1260 log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
2cb1a60d
LP		 1261 return 1;
1262 }
058dc6f3 1263#endif
2cb1a60d 1264
c3a170f3
HH		 1265 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1266 dual_timestamp_get(&userspace_timestamp);
1267
0b3325e7
LP		 1268 /* Determine if this is a reexecution or normal bootup. We do
1269 * the full command line parsing much later, so let's just
1270 * have a quick peek here. */
db813c2a
LP		 1271 if (strv_find(argv+1, "--deserialize"))
1272 skip_setup = true;
0b3325e7 1273
2660882b
LP		 1274 /* If we have switched root, do all the special setup
1275 * things */
db813c2a
LP		 1276 if (strv_find(argv+1, "--switched-root"))
1277 skip_setup = false;
d03bc1b8 1278
f3b6a3ed
LP		 1279 /* If we get started via the /sbin/init symlink then we are
1280 called 'init'. After a subsequent reexecution we are then
1281 called 'systemd'. That is confusing, hence let's call us
1282 systemd right-away. */
f3b6a3ed
LP		 1283 program_invocation_short_name = systemd;
1284 prctl(PR_SET_NAME, systemd);
5d6b1584 1285
9a0e6896
LP		 1286 saved_argv = argv;
1287 saved_argc = argc;
f3b6a3ed 1288
2cc59dbf 1289 log_show_color(isatty(STDERR_FILENO) > 0);
c1dc6153 1290 log_set_upgrade_syslog_to_journal(true);
bbe63281 1291
90dc8c2e
MG		 1292 /* Disable the umask logic */
1293 if (getpid() == 1)
1294 umask(0);
1295
a866073d 1296 if (getpid() == 1 && detect_container(NULL) <= 0) {
4f8d551f 1297
a866073d 1298 /* Running outside of a container as PID 1 */
b2c23da8 1299 arg_running_as = MANAGER_SYSTEM;
a866073d
LP		 1300 make_null_stdio();
1301 log_set_target(LOG_TARGET_KMSG);
1302 log_open();
1303
21bf2ab0 1304 if (in_initrd())
c3a170f3 1305 initrd_timestamp = userspace_timestamp;
c3ba6250 1306
2660882b 1307 if (!skip_setup) {
8f838d8a 1308 mount_setup_early();
c2e0d600 1309 dual_timestamp_get(&security_start_timestamp);
cb6531be
ZJS		 1310 if (mac_selinux_setup(&loaded_policy) < 0) {
1311 error_message = "Failed to load SELinux policy";
0b3325e7 1312 goto finish;
cb6531be
ZJS		 1313 } else if (ima_setup() < 0) {
1314 error_message = "Failed to load IMA policy";
81611586 1315 goto finish;
cb6531be
ZJS		 1316 } else if (mac_smack_setup(&loaded_policy) < 0) {
1317 error_message = "Failed to load SMACK policy";
ffbd2c4d 1318 goto finish;
cb6531be 1319 }
c2e0d600 1320 dual_timestamp_get(&security_finish_timestamp);
81611586 1321 }
0b3325e7 1322
cb6531be
ZJS		 1323 if (mac_selinux_init(NULL) < 0) {
1324 error_message = "Failed to initialize SELinux policy";
0ff4cdd9 1325 goto finish;
cb6531be 1326 }
7948c4df 1327
72edcff5 1328 if (!skip_setup) {
24efb112 1329 if (clock_is_localtime() > 0) {
0b3325e7 1330 int min;
7948c4df 1331
c264aeab
KS		 1332 /*
1333 * The very first call of settimeofday() also does a time warp in the kernel.
1334 *
1335 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1336 * external tools to take care of maintaining the RTC and do all adjustments.
1337 * This matches the behavior of Windows, which leaves the RTC alone if the
1338 * registry tells that the RTC runs in UTC.
1339 */
24efb112 1340 r = clock_set_timezone(&min);
0b3325e7 1341 if (r < 0)
da927ba9 1342 log_error_errno(r, "Failed to apply local time delta, ignoring: %m");
0b3325e7
LP		 1343 else
1344 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
19e65613
KS		 1345 } else if (!in_initrd()) {
1346 /*
c264aeab 1347 * Do a dummy very first call to seal the kernel's time warp magic.
19e65613
KS		 1348 *
1349 * Do not call this this from inside the initrd. The initrd might not
1350 * carry /etc/adjtime with LOCAL, but the real system could be set up
1351 * that way. In such case, we need to delay the time-warp or the sealing
1352 * until we reach the real system.
c264aeab
KS		 1353 *
1354 * Do no set the kernel's timezone. The concept of local time cannot
1355 * be supported reliably, the time will jump or be incorrect at every daylight
1356 * saving time change. All kernel local time concepts will be treated
1357 * as UTC that way.
19e65613 1358 */
c264aeab 1359 clock_reset_timewarp();
72edcff5
KS		 1360 }
1361 }
a866073d
LP		 1362
1363 /* Set the default for later on, but don't actually
1364 * open the logs like this for now. Note that if we
1365 * are transitioning from the initrd there might still
1366 * be journal fd open, and we shouldn't attempt
1367 * opening that before we parsed /proc/cmdline which
1368 * might redirect output elsewhere. */
1369 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1370
1371 } else if (getpid() == 1) {
a866073d 1372 /* Running inside a container, as PID 1 */
b2c23da8 1373 arg_running_as = MANAGER_SYSTEM;
a866073d 1374 log_set_target(LOG_TARGET_CONSOLE);
99f09825 1375 log_close_console(); /* force reopen of /dev/console */
a866073d
LP		 1376 log_open();
1377
1378 /* For the later on, see above... */
1379 log_set_target(LOG_TARGET_JOURNAL);
1380
c3a170f3
HH		 1381 /* clear the kernel timestamp,
1382 * because we are in a container */
1383 kernel_timestamp.monotonic = 0ULL;
1384 kernel_timestamp.realtime = 0ULL;
a866073d 1385
c3a170f3 1386 } else {
a866073d 1387 /* Running as user instance */
b2c23da8 1388 arg_running_as = MANAGER_USER;
eeecf6e6 1389 log_set_target(LOG_TARGET_AUTO);
871e5809 1390 log_open();
c3a170f3
HH		 1391
1392 /* clear the kernel timestamp,
1393 * because we are not PID 1 */
1394 kernel_timestamp.monotonic = 0ULL;
1395 kernel_timestamp.realtime = 0ULL;
bbe63281 1396 }
a5dab5ce 1397
0c85a4f3 1398 /* Initialize default unit */
6afa301b
LP		 1399 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1400 if (r < 0) {
da927ba9 1401 log_emergency_errno(r, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET);
cb6531be 1402 error_message = "Failed to set default unit";
f170852a 1403 goto finish;
14212119 1404 }
60918275 1405
a07fdfa3 1406 r = initialize_join_controllers();
cb6531be 1407 if (r < 0) {
ff9b60f3 1408 error_message = "Failed to initialize cgroup controllers";
0c85a4f3 1409 goto finish;
cb6531be 1410 }
0c85a4f3 1411
f170852a
LP		 1412 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1413 * /proc/$PID/fd is available. */
c1dae1b3 1414 if (getpid() == 1) {
f84f9974
LP		 1415
1416 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
2e75e2a8
DM		 1417 if (!skip_setup)
1418 kmod_setup();
2e75e2a8 1419
0c85a4f3 1420 r = mount_setup(loaded_policy);
cb6531be
ZJS		 1421 if (r < 0) {
1422 error_message = "Failed to mount API filesystems";
8efe3c01 1423 goto finish;
cb6531be 1424 }
0c85a4f3 1425 }
4ade7963
LP		 1426
1427 /* Reset all signal handlers. */
ce30c8dc
LP		 1428 (void) reset_all_signal_handlers();
1429 (void) ignore_signals(SIGNALS_IGNORE, -1);
078e4539 1430
cb6531be
ZJS		 1431 if (parse_config_file() < 0) {
1432 error_message = "Failed to parse config file";
487393e9 1433 goto finish;
cb6531be 1434 }
487393e9 1435
b2c23da8 1436 if (arg_running_as == MANAGER_SYSTEM) {
b5884878
LP		 1437 r = parse_proc_cmdline(parse_proc_cmdline_item);
1438 if (r < 0)
da927ba9 1439 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
b5884878 1440 }
f170852a 1441
1de1c9c3
LP		 1442 /* Note that this also parses bits from the kernel command
1443 * line, including "debug". */
f170852a
LP		 1444 log_parse_environment();
1445
cb6531be
ZJS		 1446 if (parse_argv(argc, argv) < 0) {
1447 error_message = "Failed to parse commandline arguments";
f170852a 1448 goto finish;
cb6531be 1449 }
f170852a 1450
6bae23a0
TB		 1451 if (arg_action == ACTION_TEST &&
1452 geteuid() == 0) {
b5c6cf87
LP		 1453 log_error("Don't run test mode as root.");
1454 goto finish;
1455 }
1456
b2c23da8 1457 if (arg_running_as == MANAGER_USER &&
6bae23a0
TB		 1458 arg_action == ACTION_RUN &&
1459 sd_booted() <= 0) {
1460 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1461 goto finish;
1462 }
1463
b2c23da8 1464 if (arg_running_as == MANAGER_SYSTEM &&
fe783b03
LP		 1465 arg_action == ACTION_RUN &&
1466 running_in_chroot() > 0) {
1467 log_error("Cannot be run in a chroot() environment.");
1468 goto finish;
1469 }
1470
0d8c31ff
ZJS		 1471 if (arg_action == ACTION_TEST)
1472 skip_setup = true;
1473
b87c2aa6
ZJS		 1474 pager_open_if_enabled();
1475
fa0f4d8a 1476 if (arg_action == ACTION_HELP) {
f170852a
LP		 1477 retval = help();
1478 goto finish;
9ba0bc4e
ZJS		 1479 } else if (arg_action == ACTION_VERSION) {
1480 retval = version();
1481 goto finish;
fa0f4d8a 1482 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
e537352b 1483 unit_dump_config_items(stdout);
22f4096c 1484 retval = EXIT_SUCCESS;
e537352b 1485 goto finish;
fa0f4d8a 1486 } else if (arg_action == ACTION_DONE) {
22f4096c 1487 retval = EXIT_SUCCESS;
4288f619 1488 goto finish;
f170852a
LP		 1489 }
1490
b2c23da8 1491 if (arg_running_as == MANAGER_USER &&
8be28fb1
KS		 1492 !getenv("XDG_RUNTIME_DIR")) {
1493 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1494 goto finish;
1495 }
1496
fa0f4d8a 1497 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
f170852a 1498
871e5809
LP		 1499 /* Close logging fds, in order not to confuse fdset below */
1500 log_close();
1501
a16e1123 1502 /* Remember open file descriptors for later deserialization */
01e10de3
LP		 1503 r = fdset_new_fill(&fds);
1504 if (r < 0) {
da927ba9 1505 log_emergency_errno(r, "Failed to allocate fd set: %m");
cb6531be 1506 error_message = "Failed to allocate fd set";
01e10de3
LP		 1507 goto finish;
1508 } else
1509 fdset_cloexec(fds, true);
a16e1123 1510
d3b1c508
LP		 1511 if (arg_serialization)
1512 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
a16e1123 1513
b2c23da8 1514 if (arg_running_as == MANAGER_SYSTEM)
80876c20
LP		 1515 /* Become a session leader if we aren't one yet. */
1516 setsid();
4ade7963 1517
befb5b6a 1518 /* Move out of the way, so that we won't block unmounts */
d250afe7 1519 assert_se(chdir("/") == 0);
befb5b6a 1520
2146621b
LP		 1521 /* Reset the console, but only if this is really init and we
1522 * are freshly booted */
b2c23da8 1523 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
56d96fc0
LP		 1524
1525 /* If we are init, we connect stdin/stdout/stderr to
1526 * /dev/null and make sure we don't have a controlling
1527 * tty. */
1528 release_terminal();
1529
1530 if (getpid() == 1 && !skip_setup)
1531 console_setup();
1532 }
4ade7963 1533
18149b9f 1534 /* Open the logging devices, if possible and necessary */
843d2643 1535 log_open();
4ade7963 1536
b6e2f329
LP		 1537 if (arg_show_status == _SHOW_STATUS_UNSET)
1538 arg_show_status = SHOW_STATUS_YES;
1539
5373d602
LP		 1540 /* Make sure we leave a core dump without panicing the
1541 * kernel. */
ab422445 1542 if (getpid() == 1) {
4fc935ca 1543 install_crash_handler();
97c4f35c 1544
0c85a4f3
LP		 1545 r = mount_cgroup_controllers(arg_join_controllers);
1546 if (r < 0)
1547 goto finish;
1548 }
1549
b2c23da8 1550 if (arg_running_as == MANAGER_SYSTEM) {
c20f5ac7
LP		 1551 const char *virtualization = NULL;
1552
0d8c31ff
ZJS		 1553 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1554 arg_action == ACTION_TEST ? "test " : "" );
c20f5ac7
LP		 1555
1556 detect_virtualization(&virtualization);
1557 if (virtualization)
d3f86679 1558 log_info("Detected virtualization %s.", virtualization);
c20f5ac7 1559
fdd25311
LP		 1560 write_container_id();
1561
d3f86679 1562 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
d9d93745 1563
26a1efdf
LP		 1564 if (in_initrd())
1565 log_info("Running in initial RAM disk.");
1566
3408ba01
LP		 1567 /* Let's check whether /etc is already populated. We
1568 * don't actually really check for that, but use
1569 * /etc/machine-id as flag file. This allows container
1570 * managers and installers to provision a couple of
1571 * files already. If the container manager wants to
1572 * provision the machine ID itself it should pass
ee33e53a 1573 * $container_uuid to PID 1. */
3408ba01 1574
baa1bdf7 1575 empty_etc = access("/etc/machine-id", F_OK) < 0;
5f5c2f38
LP		 1576 if (empty_etc)
1577 log_info("Running with unpopulated /etc.");
d8160f21 1578 } else {
1f97091d
LP		 1579 _cleanup_free_ char *t;
1580
1581 t = uid_to_name(getuid());
0d8c31ff
ZJS		 1582 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1583 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
d8160f21 1584 }
a5dab5ce 1585
b2c23da8 1586 if (arg_running_as == MANAGER_SYSTEM && !skip_setup) {
031886ed 1587 if (arg_show_status > 0)
888c6216
LP		 1588 status_welcome();
1589
888c6216 1590 hostname_setup();
489388fb 1591 machine_id_setup(NULL);
888c6216 1592 loopback_setup();
490aed58 1593
6ee5bbf8 1594 test_mtab();
80758717 1595 test_usr();
af5bc85d 1596 }
302e8c4c 1597
b2c23da8 1598 if (arg_running_as == MANAGER_SYSTEM && arg_runtime_watchdog > 0)
e96d6be7
LP		 1599 watchdog_set_timeout(&arg_runtime_watchdog);
1600
3a43da28 1601 if (arg_timer_slack_nsec != NSEC_INFINITY)
aa0f64ac 1602 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
56f64d95 1603 log_error_errno(errno, "Failed to adjust timer slack: %m");
aa0f64ac 1604
ec8927ca 1605 if (arg_capability_bounding_set_drop) {
31c885e9 1606 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
ec8927ca 1607 if (r < 0) {
da927ba9 1608 log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m");
cb6531be 1609 error_message = "Failed to drop capability bounding set of usermode helpers";
ec8927ca
LP		 1610 goto finish;
1611 }
31c885e9 1612 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
939b8f14 1613 if (r < 0) {
da927ba9 1614 log_emergency_errno(r, "Failed to drop capability bounding set: %m");
cb6531be 1615 error_message = "Failed to drop capability bounding set";
939b8f14
LP		 1616 goto finish;
1617 }
ec8927ca
LP		 1618 }
1619
d3b1c508
LP		 1620 if (arg_syscall_archs) {
1621 r = enforce_syscall_archs(arg_syscall_archs);
cb6531be
ZJS		 1622 if (r < 0) {
1623 error_message = "Failed to set syscall architectures";
d3b1c508 1624 goto finish;
cb6531be 1625 }
d3b1c508
LP		 1626 }
1627
61b9b203 1628 if (arg_running_as == MANAGER_USER)
d4447f4d 1629 /* Become reaper of our children */
61b9b203 1630 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0)
56f64d95 1631 log_warning_errno(errno, "Failed to make us a subreaper: %m");
d4447f4d 1632
b2c23da8 1633 if (arg_running_as == MANAGER_SYSTEM) {
4096d6f5
LP		 1634 bump_rlimit_nofile(&saved_rlimit_nofile);
1635
5f5c2f38 1636 if (empty_etc) {
304b3079 1637 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_ENABLE_ONLY, false, NULL, 0);
5f5c2f38 1638 if (r < 0)
da927ba9 1639 log_warning_errno(r, "Failed to populate /etc with preset unit settings, ignoring: %m");
5f5c2f38
LP		 1640 else
1641 log_info("Populated /etc with preset unit settings.");
1642 }
1643 }
1644
0d8c31ff 1645 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
e96d6be7 1646 if (r < 0) {
da927ba9 1647 log_emergency_errno(r, "Failed to allocate manager object: %m");
cb6531be 1648 error_message = "Failed to allocate manager object";
60918275
LP		 1649 goto finish;
1650 }
1651
9e58ff9c 1652 m->confirm_spawn = arg_confirm_spawn;
e96d6be7
LP		 1653 m->runtime_watchdog = arg_runtime_watchdog;
1654 m->shutdown_watchdog = arg_shutdown_watchdog;
c3a170f3
HH		 1655 m->userspace_timestamp = userspace_timestamp;
1656 m->kernel_timestamp = kernel_timestamp;
c3a170f3 1657 m->initrd_timestamp = initrd_timestamp;
c2e0d600
TA		 1658 m->security_start_timestamp = security_start_timestamp;
1659 m->security_finish_timestamp = security_finish_timestamp;
9e58ff9c 1660
06af2a04 1661 manager_set_defaults(m);
27d340c7 1662 manager_set_show_status(m, arg_show_status);
e2680723 1663 manager_set_first_boot(m, empty_etc);
27d340c7 1664
bf4df7c3 1665 /* Remember whether we should queue the default job */
d3b1c508 1666 queue_default_job = !arg_serialization || arg_switched_root;
bf4df7c3 1667
9d76d730
LP		 1668 before_startup = now(CLOCK_MONOTONIC);
1669
d3b1c508 1670 r = manager_startup(m, arg_serialization, fds);
e96d6be7 1671 if (r < 0)
da927ba9 1672 log_error_errno(r, "Failed to fully start up daemon: %m");
a16e1123 1673
bf4df7c3
LP		 1674 /* This will close all file descriptors that were opened, but
1675 * not claimed by any unit. */
01e10de3 1676 fdset_free(fds);
6c081276 1677 fds = NULL;
f50e0a01 1678
d3b1c508
LP		 1679 if (arg_serialization) {
1680 fclose(arg_serialization);
1681 arg_serialization = NULL;
bf4df7c3
LP		 1682 }
1683
1684 if (queue_default_job) {
718db961 1685 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1c27d3f3 1686 Unit *target = NULL;
bacbccb7 1687 Job *default_unit_job;
398ef8ba 1688
fa0f4d8a 1689 log_debug("Activating default unit: %s", arg_default_unit);
a16e1123 1690
e96d6be7 1691 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
718db961
LP		 1692 if (r < 0)
1693 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1694 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
c33b3297 1695 log_error_errno(target->load_error, "Failed to load default target: %m");
ac155bb8 1696 else if (target->load_state == UNIT_MASKED)
6daf4f90 1697 log_error("Default target masked.");
27b14a22 1698
ac155bb8 1699 if (!target || target->load_state != UNIT_LOADED) {
a16e1123 1700 log_info("Trying to load rescue target...");
1c27d3f3 1701
e96d6be7
LP		 1702 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1703 if (r < 0) {
4104970e 1704 log_emergency("Failed to load rescue target: %s", bus_error_message(&error, r));
cb6531be 1705 error_message = "Failed to load rescue target";
a16e1123 1706 goto finish;
11ddb6f4 1707 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
c33b3297 1708 log_emergency_errno(target->load_error, "Failed to load rescue target: %m");
cb6531be 1709 error_message = "Failed to load rescue target";
1c27d3f3 1710 goto finish;
ac155bb8 1711 } else if (target->load_state == UNIT_MASKED) {
4104970e 1712 log_emergency("Rescue target masked.");
cb6531be 1713 error_message = "Rescue target masked";
00dc5d76 1714 goto finish;
a16e1123
LP		 1715 }
1716 }
37d88da7 1717
ac155bb8 1718 assert(target->load_state == UNIT_LOADED);
00dc5d76 1719
fa0f4d8a 1720 if (arg_action == ACTION_TEST) {
40d50879 1721 printf("-> By units:\n");
a16e1123
LP		 1722 manager_dump_units(m, stdout, "\t");
1723 }
1724
95f1b47d 1725 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
ab17a050 1726 if (r == -EPERM) {
718db961 1727 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
ab17a050
LP		 1728
1729 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1730 if (r < 0) {
4104970e 1731 log_emergency("Failed to start default target: %s", bus_error_message(&error, r));
cb6531be 1732 error_message = "Failed to start default target";
ab17a050
LP		 1733 goto finish;
1734 }
1735 } else if (r < 0) {
4104970e 1736 log_emergency("Failed to isolate default target: %s", bus_error_message(&error, r));
cb6531be 1737 error_message = "Failed to isolate default target";
37d88da7
LP		 1738 goto finish;
1739 }
ab17a050 1740
bacbccb7 1741 m->default_unit_job_id = default_unit_job->id;
60918275 1742
07672f49
LP		 1743 after_startup = now(CLOCK_MONOTONIC);
1744 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1745 "Loaded units and determined initial transaction in %s.",
fdb14b7e 1746 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
07672f49 1747
fa0f4d8a 1748 if (arg_action == ACTION_TEST) {
40d50879 1749 printf("-> By jobs:\n");
a16e1123 1750 manager_dump_jobs(m, stdout, "\t");
22f4096c 1751 retval = EXIT_SUCCESS;
a16e1123
LP		 1752 goto finish;
1753 }
e965d56d 1754 }
d46de8a1 1755
a16e1123 1756 for (;;) {
e96d6be7
LP		 1757 r = manager_loop(m);
1758 if (r < 0) {
da927ba9 1759 log_emergency_errno(r, "Failed to run main loop: %m");
cb6531be 1760 error_message = "Failed to run main loop";
a16e1123
LP		 1761 goto finish;
1762 }
11dd41ce 1763
a16e1123 1764 switch (m->exit_code) {
e965d56d 1765
a16e1123 1766 case MANAGER_EXIT:
22f4096c 1767 retval = EXIT_SUCCESS;
a16e1123
LP		 1768 log_debug("Exit.");
1769 goto finish;
e965d56d 1770
a16e1123 1771 case MANAGER_RELOAD:
e015090f 1772 log_info("Reloading.");
06af2a04
TB		 1773
1774 r = parse_config_file();
1775 if (r < 0)
1776 log_error("Failed to parse config file.");
1777
1778 manager_set_defaults(m);
1779
e96d6be7
LP		 1780 r = manager_reload(m);
1781 if (r < 0)
da927ba9 1782 log_error_errno(r, "Failed to reload: %m");
a16e1123 1783 break;
cea8e32e 1784
a16e1123 1785 case MANAGER_REEXECUTE:
664f88a7 1786
cb6531be 1787 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0) {
6b9af963 1788 error_message = "Failed to prepare for reexecution";
a16e1123 1789 goto finish;
cb6531be 1790 }
60918275 1791
a16e1123 1792 reexecute = true;
e015090f 1793 log_notice("Reexecuting.");
a16e1123
LP		 1794 goto finish;
1795
664f88a7
LP		 1796 case MANAGER_SWITCH_ROOT:
1797 /* Steal the switch root parameters */
41669317 1798 switch_root_dir = m->switch_root;
664f88a7
LP		 1799 switch_root_init = m->switch_root_init;
1800 m->switch_root = m->switch_root_init = NULL;
1801
1802 if (!switch_root_init)
cb6531be 1803 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0) {
6b9af963 1804 error_message = "Failed to prepare for reexecution";
664f88a7 1805 goto finish;
cb6531be 1806 }
664f88a7
LP		 1807
1808 reexecute = true;
1809 log_notice("Switching root.");
1810 goto finish;
1811
b9080b03
FF		 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]);
e96d6be7 1824 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
b9080b03
FF		 1825
1826 log_notice("Shutting down.");
1827 goto finish;
1828 }
1829
a16e1123
LP		 1830 default:
1831 assert_not_reached("Unknown exit code.");
1832 }
1833 }
f170852a 1834
60918275 1835finish:
b87c2aa6
ZJS		 1836 pager_close();
1837
81f5fc2d
MM		 1838 if (m)
1839 arg_shutdown_watchdog = m->shutdown_watchdog;
06d8d842 1840 m = manager_free(m);
60918275 1841
d3b1c508 1842 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
4096d6f5 1843 free(arg_default_rlimit[j]);
d3b1c508
LP		 1844 arg_default_rlimit[j] = NULL;
1845 }
c93ff2e9 1846
97b11eed 1847 arg_default_unit = mfree(arg_default_unit);
d3b1c508 1848
0c85a4f3 1849 free_join_controllers();
b9cd2ec1 1850
97b11eed 1851 arg_default_environment = strv_free(arg_default_environment);
d3b1c508
LP		 1852
1853 set_free(arg_syscall_archs);
1854 arg_syscall_archs = NULL;
1855
cc56fafe 1856 mac_selinux_finish();
b2bb3dbe 1857
a16e1123 1858 if (reexecute) {
664f88a7 1859 const char **args;
e564a982 1860 unsigned i, args_size;
a16e1123 1861
664f88a7
LP		 1862 /* Close and disarm the watchdog, so that the new
1863 * instance can reinitialize it, but doesn't get
1864 * rebooted while we do that */
1865 watchdog_close(true);
a16e1123 1866
4096d6f5
LP		 1867 /* Reset the RLIMIT_NOFILE to the kernel default, so
1868 * that the new systemd can pass the kernel default to
1869 * its child processes */
1870 if (saved_rlimit_nofile.rlim_cur > 0)
1871 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1872
41669317 1873 if (switch_root_dir) {
cee530bb
LP		 1874 /* Kill all remaining processes from the
1875 * initrd, but don't wait for them, so that we
1876 * can handle the SIGCHLD for them after
1877 * deserializing. */
0bee65f0 1878 broadcast_signal(SIGTERM, false, true);
bd3fa1d2 1879
5a4bf02f
HH		 1880 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1881 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
41669317 1882 if (r < 0)
da927ba9 1883 log_error_errno(r, "Failed to switch root, trying to continue: %m");
41669317 1884 }
a16e1123 1885
d03bc1b8 1886 args_size = MAX(6, argc+1);
e564a982 1887 args = newa(const char*, args_size);
a16e1123 1888
664f88a7 1889 if (!switch_root_init) {
5ffa8c81 1890 char sfd[DECIMAL_STR_MAX(int) + 1];
a16e1123 1891
664f88a7
LP		 1892 /* First try to spawn ourselves with the right
1893 * path, and with full serialization. We do
1894 * this only if the user didn't specify an
1895 * explicit init to spawn. */
edb9aaa8 1896
d3b1c508 1897 assert(arg_serialization);
664f88a7 1898 assert(fds);
edb9aaa8 1899
5ffa8c81 1900 xsprintf(sfd, "%i", fileno(arg_serialization));
edb9aaa8 1901
664f88a7
LP		 1902 i = 0;
1903 args[i++] = SYSTEMD_BINARY_PATH;
41669317 1904 if (switch_root_dir)
2660882b 1905 args[i++] = "--switched-root";
b2c23da8 1906 args[i++] = arg_running_as == MANAGER_SYSTEM ? "--system" : "--user";
664f88a7
LP		 1907 args[i++] = "--deserialize";
1908 args[i++] = sfd;
1909 args[i++] = NULL;
edb9aaa8 1910
ce8aba56
KS		 1911 /* do not pass along the environment we inherit from the kernel or initrd */
1912 if (switch_root_dir)
1913 clearenv();
1914
e564a982 1915 assert(i <= args_size);
664f88a7
LP		 1916 execv(args[0], (char* const*) args);
1917 }
6e98720f 1918
664f88a7
LP		 1919 /* Try the fallback, if there is any, without any
1920 * serialization. We pass the original argv[] and
1921 * envp[]. (Well, modulo the ordering changes due to
1922 * getopt() in argv[], and some cleanups in envp[],
1923 * but let's hope that doesn't matter.) */
a16e1123 1924
d3b1c508
LP		 1925 if (arg_serialization) {
1926 fclose(arg_serialization);
1927 arg_serialization = NULL;
b8f83232 1928 }
a16e1123 1929
b8f83232 1930 if (fds) {
664f88a7 1931 fdset_free(fds);
b8f83232
LP		 1932 fds = NULL;
1933 }
a16e1123 1934
a504223d
HH		 1935 /* Reopen the console */
1936 make_console_stdio();
1937
d3b1c508 1938 for (j = 1, i = 1; j < (unsigned) argc; j++)
664f88a7 1939 args[i++] = argv[j];
a16e1123 1940 args[i++] = NULL;
e564a982 1941 assert(i <= args_size);
b8f83232 1942
1b6d7fa7 1943 /* Reenable any blocked signals, especially important
5a85ca1c 1944 * if we switch from initial ramdisk to init=... */
ce30c8dc
LP		 1945 (void) reset_all_signal_handlers();
1946 (void) reset_signal_mask();
5a85ca1c 1947
b8f83232
LP		 1948 if (switch_root_init) {
1949 args[0] = switch_root_init;
1950 execv(args[0], (char* const*) args);
56f64d95 1951 log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");
b8f83232
LP		 1952 }
1953
1954 args[0] = "/sbin/init";
a16e1123
LP		 1955 execv(args[0], (char* const*) args);
1956
745e2fb7
KS		 1957 if (errno == ENOENT) {
1958 log_warning("No /sbin/init, trying fallback");
b8f83232 1959
745e2fb7
KS		 1960 args[0] = "/bin/sh";
1961 args[1] = NULL;
1962 execv(args[0], (char* const*) args);
56f64d95 1963 log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m");
745e2fb7 1964 } else
56f64d95 1965 log_warning_errno(errno, "Failed to execute /sbin/init, giving up: %m");
a16e1123
LP		 1966 }
1967
d3b1c508
LP		 1968 if (arg_serialization) {
1969 fclose(arg_serialization);
1970 arg_serialization = NULL;
1971 }
a16e1123 1972
d3b1c508 1973 if (fds) {
a16e1123 1974 fdset_free(fds);
d3b1c508
LP		 1975 fds = NULL;
1976 }
a16e1123 1977
54b434b1
LP		 1978#ifdef HAVE_VALGRIND_VALGRIND_H
1979 /* If we are PID 1 and running under valgrind, then let's exit
1980 * here explicitly. valgrind will only generate nice output on
1981 * exit(), not on exec(), hence let's do the former not the
1982 * latter here. */
1983 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1984 return 0;
1985#endif
1986
b9080b03 1987 if (shutdown_verb) {
b1e90ec5
ZJS		 1988 char log_level[DECIMAL_STR_MAX(int) + 1];
1989 const char* command_line[9] = {
b9080b03
FF		 1990 SYSTEMD_SHUTDOWN_BINARY_PATH,
1991 shutdown_verb,
b1e90ec5
ZJS		 1992 "--log-level", log_level,
1993 "--log-target",
b9080b03 1994 };
b1e90ec5 1995 unsigned pos = 5;
e3e45d4f 1996 _cleanup_strv_free_ char **env_block = NULL;
15bd5aee
LP		 1997
1998 assert(command_line[pos] == NULL);
e3e45d4f 1999 env_block = strv_copy(environ);
b9080b03 2000
5ffa8c81 2001 xsprintf(log_level, "%d", log_get_max_level());
b1e90ec5
ZJS		 2002
2003 switch (log_get_target()) {
2004 case LOG_TARGET_KMSG:
2005 case LOG_TARGET_JOURNAL_OR_KMSG:
2006 case LOG_TARGET_SYSLOG_OR_KMSG:
2007 command_line[pos++] = "kmsg";
2008 break;
2009
10f00ff1
ILG		 2010 case LOG_TARGET_NULL:
2011 command_line[pos++] = "null";
2012 break;
2013
b1e90ec5
ZJS		 2014 case LOG_TARGET_CONSOLE:
2015 default:
2016 command_line[pos++] = "console";
2017 break;
2018 };
2019
2020 if (log_get_show_color())
2021 command_line[pos++] = "--log-color";
2022
2023 if (log_get_show_location())
2024 command_line[pos++] = "--log-location";
2025
26abdc73 2026 assert(pos < ELEMENTSOF(command_line));
b1e90ec5 2027
e96d6be7 2028 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
e3e45d4f 2029 char *e;
d18f337c 2030
e96d6be7
LP		 2031 /* If we reboot let's set the shutdown
2032 * watchdog and tell the shutdown binary to
2033 * repeatedly ping it */
c2cc6b9a
LP		 2034 r = watchdog_set_timeout(&arg_shutdown_watchdog);
2035 watchdog_close(r < 0);
e96d6be7 2036
e3e45d4f
SP		 2037 /* Tell the binary how often to ping, ignore failure */
2038 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2039 strv_push(&env_block, e);
2040 } else
e96d6be7
LP		 2041 watchdog_close(true);
2042
66713f77
LP		 2043 /* Avoid the creation of new processes forked by the
2044 * kernel; at this point, we will not listen to the
2045 * signals anyway */
2046 if (detect_container(NULL) <= 0)
2047 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
ad929bcc 2048
d18f337c 2049 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
56f64d95 2050 log_error_errno(errno, "Failed to execute shutdown binary, %s: %m",
b1e90ec5 2051 getpid() == 1 ? "freezing" : "quitting");
b9080b03
FF		 2052 }
2053
cb6531be
ZJS		 2054 if (getpid() == 1) {
2055 if (error_message)
2056 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
2057 ANSI_HIGHLIGHT_RED_ON "!!!!!!" ANSI_HIGHLIGHT_OFF,
2058 "%s, freezing.", error_message);
c3b3c274 2059 freeze();
cb6531be 2060 }
c3b3c274 2061
60918275
LP		 2062 return retval;
2063}
Unnamed repository; edit this file 'description' to name the repository.