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util: improve comments why we ignore EACCES and EPERM
[thirdparty/systemd.git] / src / core / main.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
a7334b09 2
60918275 3#include <errno.h>
3dfc9763 4#include <fcntl.h>
f170852a 5#include <getopt.h>
97c4f35c 6#include <signal.h>
3dfc9763
LP		 7#include <stdio.h>
8#include <string.h>
664f88a7 9#include <sys/mount.h>
3dfc9763 10#include <sys/prctl.h>
b9e74c39 11#include <sys/reboot.h>
3dfc9763
LP		 12#include <sys/stat.h>
13#include <unistd.h>
349cc4a5 14#if HAVE_SECCOMP
b64a3d86
LP		 15#include <seccomp.h>
16#endif
349cc4a5 17#if HAVE_VALGRIND_VALGRIND_H
3dfc9763
LP		 18#include <valgrind/valgrind.h>
19#endif
54b434b1 20
718db961 21#include "sd-bus.h"
cf0fbc49 22#include "sd-daemon.h"
b2e7486c 23#include "sd-messages.h"
3dfc9763 24
b5efdb8a 25#include "alloc-util.h"
d9d93745 26#include "architecture.h"
3dfc9763
LP		 27#include "build.h"
28#include "bus-error.h"
29#include "bus-util.h"
430f0182 30#include "capability-util.h"
24efb112 31#include "clock-util.h"
3dfc9763 32#include "conf-parser.h"
618234a5 33#include "cpu-set-util.h"
bbc1acab 34#include "dbus.h"
3dfc9763
LP		 35#include "dbus-manager.h"
36#include "def.h"
eee8b7ab 37#include "emergency-action.h"
3dfc9763 38#include "env-util.h"
57b7a260 39#include "exit-status.h"
3ffd4af2 40#include "fd-util.h"
3dfc9763 41#include "fdset.h"
718db961 42#include "fileio.h"
f97b34a6 43#include "format-util.h"
f4f15635 44#include "fs-util.h"
3dfc9763
LP		 45#include "hostname-setup.h"
46#include "ima-setup.h"
47#include "killall.h"
48#include "kmod-setup.h"
d7b8eec7 49#include "load-fragment.h"
3dfc9763 50#include "log.h"
b6e66135 51#include "loopback-setup.h"
b6e66135 52#include "machine-id-setup.h"
3dfc9763
LP		 53#include "manager.h"
54#include "missing.h"
55#include "mount-setup.h"
d58ad743 56#include "os-util.h"
3dfc9763 57#include "pager.h"
6bedfcbb 58#include "parse-util.h"
7d5ceb64 59#include "path-util.h"
4e731273 60#include "proc-cmdline.h"
3dfc9763 61#include "process-util.h"
8869a0b4 62#include "raw-clone.h"
78f22b97 63#include "rlimit-util.h"
349cc4a5 64#if HAVE_SECCOMP
83f12b27
FS		 65#include "seccomp-util.h"
66#endif
b6e66135 67#include "selinux-setup.h"
3dfc9763
LP		 68#include "selinux-util.h"
69#include "signal-util.h"
ffbd2c4d 70#include "smack-setup.h"
3dfc9763 71#include "special.h"
8fcde012 72#include "stat-util.h"
15a5e950 73#include "stdio-util.h"
3dfc9763
LP		 74#include "strv.h"
75#include "switch-root.h"
76#include "terminal-util.h"
8612da97 77#include "umask-util.h"
b1d4f8e1 78#include "user-util.h"
9ce17593 79#include "util.h"
3dfc9763
LP		 80#include "virt.h"
81#include "watchdog.h"
b6e66135 82
f170852a
LP		 83static enum {
84 ACTION_RUN,
e965d56d 85 ACTION_HELP,
9ba0bc4e 86 ACTION_VERSION,
e537352b 87 ACTION_TEST,
bbc1acab
YW		 88 ACTION_DUMP_CONFIGURATION_ITEMS,
89 ACTION_DUMP_BUS_PROPERTIES,
fa0f4d8a 90} arg_action = ACTION_RUN;
fa0f4d8a 91static char *arg_default_unit = NULL;
463d0d15 92static bool arg_system = false;
fa0f4d8a 93static bool arg_dump_core = true;
fa0f4d8a 94static int arg_crash_chvt = -1;
b9e74c39
LP		 95static bool arg_crash_shell = false;
96static bool arg_crash_reboot = false;
7d5ceb64 97static char *arg_confirm_spawn = NULL;
7a293242 98static ShowStatus arg_show_status = _SHOW_STATUS_INVALID;
bf4df7c3 99static bool arg_switched_root = false;
ea4b98e6 100static bool arg_no_pager = false;
2a12e32e 101static bool arg_service_watchdogs = true;
0c85a4f3 102static char ***arg_join_controllers = NULL;
706343f4 103static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
0a494f1f 104static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
1f19a534
OS		 105static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
106static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
107static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
3f41e1e5
LN		 108static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
109static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
e96d6be7
LP		 110static usec_t arg_runtime_watchdog = 0;
111static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
8a2c1fbf 112static char *arg_watchdog_device = NULL;
97d0e5f8 113static char **arg_default_environment = NULL;
517d56b1 114static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
a103496c 115static uint64_t arg_capability_bounding_set = CAP_ALL;
39362f6f 116static bool arg_no_new_privs = false;
3a43da28 117static nsec_t arg_timer_slack_nsec = NSEC_INFINITY;
bd8f585b 118static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
d3b1c508
LP		 119static Set* arg_syscall_archs = NULL;
120static FILE* arg_serialization = NULL;
085afe36 121static bool arg_default_cpu_accounting = false;
13c31542 122static bool arg_default_io_accounting = false;
377bfd2d 123static bool arg_default_ip_accounting = false;
085afe36 124static bool arg_default_blockio_accounting = false;
444d5863 125static bool arg_default_memory_accounting = MEMORY_ACCOUNTING_DEFAULT;
9ded9cd1 126static bool arg_default_tasks_accounting = true;
79baeeb9 127static uint64_t arg_default_tasks_max = UINT64_MAX;
ee48dbd5 128static sd_id128_t arg_machine_id = {};
ae8c7939 129static EmergencyAction arg_cad_burst_action = EMERGENCY_ACTION_REBOOT_FORCE;
4fc935ca 130
848e863a 131_noreturn_ static void freeze_or_reboot(void) {
b9e74c39
LP		 132
133 if (arg_crash_reboot) {
134 log_notice("Rebooting in 10s...");
135 (void) sleep(10);
136
137 log_notice("Rebooting now...");
138 (void) reboot(RB_AUTOBOOT);
139 log_emergency_errno(errno, "Failed to reboot: %m");
140 }
141
142 log_emergency("Freezing execution.");
143 freeze();
144}
145
848e863a 146_noreturn_ static void crash(int sig) {
7d06dad9
MS		 147 struct sigaction sa;
148 pid_t pid;
97c4f35c 149
df0ff127 150 if (getpid_cached() != 1)
abb26902 151 /* Pass this on immediately, if this is not PID 1 */
92ca4cac 152 (void) raise(sig);
abb26902 153 else if (!arg_dump_core)
4104970e 154 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig));
97c4f35c 155 else {
7d06dad9 156 sa = (struct sigaction) {
189d5bac 157 .sa_handler = nop_signal_handler,
b92bea5d
ZJS		 158 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
159 };
97c4f35c 160
6f5e3f35 161 /* We want to wait for the core process, hence let's enable SIGCHLD */
92ca4cac 162 (void) sigaction(SIGCHLD, &sa, NULL);
6f5e3f35 163
8869a0b4 164 pid = raw_clone(SIGCHLD);
e62d8c39 165 if (pid < 0)
56f64d95 166 log_emergency_errno(errno, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
97c4f35c 167 else if (pid == 0) {
97c4f35c 168 /* Enable default signal handler for core dump */
15a90032 169
92ca4cac
LP		 170 sa = (struct sigaction) {
171 .sa_handler = SIG_DFL,
172 };
173 (void) sigaction(sig, &sa, NULL);
97c4f35c 174
15a90032
LP		 175 /* Don't limit the coredump size */
176 (void) setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY));
97c4f35c
LP		 177
178 /* Just to be sure... */
e62d9b81 179 (void) chdir("/");
97c4f35c
LP		 180
181 /* Raise the signal again */
ee05e779 182 pid = raw_getpid();
92ca4cac 183 (void) kill(pid, sig); /* raise() would kill the parent */
97c4f35c
LP		 184
185 assert_not_reached("We shouldn't be here...");
92ca4cac 186 _exit(EXIT_FAILURE);
4fc935ca 187 } else {
8e12a6ae
LP		 188 siginfo_t status;
189 int r;
4fc935ca
LP		 190
191 /* Order things nicely. */
e62d8c39
ZJS		 192 r = wait_for_terminate(pid, &status);
193 if (r < 0)
da927ba9 194 log_emergency_errno(r, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig));
8e12a6ae 195 else if (status.si_code != CLD_DUMPED)
ee05e779
ZJS		 196 log_emergency("Caught <%s>, core dump failed (child "PID_FMT", code=%s, status=%i/%s).",
197 signal_to_string(sig),
198 pid, sigchld_code_to_string(status.si_code),
199 status.si_status,
200 strna(status.si_code == CLD_EXITED
38107f5a 201 ? exit_status_to_string(status.si_status, EXIT_STATUS_MINIMAL)
ee05e779 202 : signal_to_string(status.si_status)));
4fc935ca 203 else
4104970e 204 log_emergency("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
97c4f35c
LP		 205 }
206 }
207
b9e74c39 208 if (arg_crash_chvt >= 0)
92ca4cac 209 (void) chvt(arg_crash_chvt);
601f6a1e 210
7d06dad9
MS		 211 sa = (struct sigaction) {
212 .sa_handler = SIG_IGN,
213 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
214 };
215
216 /* Let the kernel reap children for us */
217 (void) sigaction(SIGCHLD, &sa, NULL);
8c43883a 218
7d06dad9 219 if (arg_crash_shell) {
b9e74c39 220 log_notice("Executing crash shell in 10s...");
92ca4cac 221 (void) sleep(10);
4fc935ca 222
8869a0b4 223 pid = raw_clone(SIGCHLD);
cd3bd60a 224 if (pid < 0)
56f64d95 225 log_emergency_errno(errno, "Failed to fork off crash shell: %m");
6f5e3f35 226 else if (pid == 0) {
b9e74c39 227 (void) setsid();
92ca4cac
LP		 228 (void) make_console_stdio();
229 (void) execle("/bin/sh", "/bin/sh", NULL, environ);
6f5e3f35 230
ee05e779 231 log_emergency_errno(errno, "execle() failed: %m");
92ca4cac 232 _exit(EXIT_FAILURE);
b9e74c39
LP		 233 } else {
234 log_info("Spawned crash shell as PID "PID_FMT".", pid);
4cf0b03b 235 (void) wait_for_terminate(pid, NULL);
b9e74c39 236 }
4fc935ca
LP		 237 }
238
b9e74c39 239 freeze_or_reboot();
97c4f35c
LP		 240}
241
242static void install_crash_handler(void) {
297d563d 243 static const struct sigaction sa = {
b92bea5d 244 .sa_handler = crash,
297d563d 245 .sa_flags = SA_NODEFER, /* So that we can raise the signal again from the signal handler */
b92bea5d 246 };
297d563d 247 int r;
97c4f35c 248
297d563d
LP		 249 /* We ignore the return value here, since, we don't mind if we
250 * cannot set up a crash handler */
251 r = sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
252 if (r < 0)
253 log_debug_errno(r, "I had trouble setting up the crash handler, ignoring: %m");
97c4f35c 254}
f170852a 255
56d96fc0
LP		 256static int console_setup(void) {
257 _cleanup_close_ int tty_fd = -1;
258 int r;
80876c20 259
512947d4 260 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
23bbb0de
MS		 261 if (tty_fd < 0)
262 return log_error_errno(tty_fd, "Failed to open /dev/console: %m");
80876c20 263
56d96fc0
LP		 264 /* We don't want to force text mode. plymouth may be showing
265 * pictures already from initrd. */
512947d4 266 r = reset_terminal_fd(tty_fd, false);
23bbb0de
MS		 267 if (r < 0)
268 return log_error_errno(r, "Failed to reset /dev/console: %m");
843d2643 269
56d96fc0 270 return 0;
80876c20
LP		 271}
272
b9e74c39
LP		 273static int parse_crash_chvt(const char *value) {
274 int b;
275
276 if (safe_atoi(value, &arg_crash_chvt) >= 0)
277 return 0;
278
279 b = parse_boolean(value);
280 if (b < 0)
281 return b;
282
283 if (b > 0)
284 arg_crash_chvt = 0; /* switch to where kmsg goes */
285 else
286 arg_crash_chvt = -1; /* turn off switching */
287
288 return 0;
289}
290
7d5ceb64
FB		 291static int parse_confirm_spawn(const char *value, char **console) {
292 char *s;
293 int r;
294
295 r = value ? parse_boolean(value) : 1;
296 if (r == 0) {
297 *console = NULL;
298 return 0;
299 }
300
301 if (r > 0) /* on with default tty */
302 s = strdup("/dev/console");
303 else if (is_path(value)) /* on with fully qualified path */
304 s = strdup(value);
305 else /* on with only a tty file name, not a fully qualified path */
306 s = strjoin("/dev/", value);
307 if (!s)
308 return -ENOMEM;
5b65ae15 309
7d5ceb64
FB		 310 *console = s;
311 return 0;
312}
313
ee48dbd5 314static int set_machine_id(const char *m) {
e042eab7 315 sd_id128_t t;
8b26cdbd 316 assert(m);
ee48dbd5 317
e042eab7 318 if (sd_id128_from_string(m, &t) < 0)
ee48dbd5
NC		 319 return -EINVAL;
320
e042eab7 321 if (sd_id128_is_null(t))
ee48dbd5
NC		 322 return -EINVAL;
323
e042eab7 324 arg_machine_id = t;
ee48dbd5
NC		 325 return 0;
326}
327
96287a49 328static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
f170852a 329
059cb385 330 int r;
f170852a 331
059cb385 332 assert(key);
5192bd19 333
1d84ad94 334 if (STR_IN_SET(key, "systemd.unit", "rd.systemd.unit")) {
bf4df7c3 335
1d84ad94
LP		 336 if (proc_cmdline_value_missing(key, value))
337 return 0;
bf4df7c3 338
1d84ad94
LP		 339 if (!unit_name_is_valid(value, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE))
340 log_warning("Unit name specified on %s= is not valid, ignoring: %s", key, value);
341 else if (in_initrd() == !!startswith(key, "rd.")) {
342 if (free_and_strdup(&arg_default_unit, value) < 0)
343 return log_oom();
344 }
f170852a 345
1d84ad94 346 } else if (proc_cmdline_key_streq(key, "systemd.dump_core")) {
4fc935ca 347
1d84ad94 348 r = value ? parse_boolean(value) : true;
fb472900 349 if (r < 0)
059cb385 350 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
4fc935ca 351 else
fa0f4d8a 352 arg_dump_core = r;
4fc935ca 353
1d84ad94 354 } else if (proc_cmdline_key_streq(key, "systemd.crash_chvt")) {
b9e74c39 355
1d84ad94
LP		 356 if (!value)
357 arg_crash_chvt = 0; /* turn on */
358 else if (parse_crash_chvt(value) < 0)
b9e74c39
LP		 359 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
360
1d84ad94 361 } else if (proc_cmdline_key_streq(key, "systemd.crash_shell")) {
4fc935ca 362
1d84ad94 363 r = value ? parse_boolean(value) : true;
fb472900 364 if (r < 0)
059cb385 365 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
4fc935ca 366 else
fa0f4d8a 367 arg_crash_shell = r;
5e7ee61c 368
1d84ad94 369 } else if (proc_cmdline_key_streq(key, "systemd.crash_reboot")) {
5e7ee61c 370
1d84ad94 371 r = value ? parse_boolean(value) : true;
b9e74c39
LP		 372 if (r < 0)
373 log_warning("Failed to parse crash reboot switch %s. Ignoring.", value);
5e7ee61c 374 else
b9e74c39 375 arg_crash_reboot = r;
5e7ee61c 376
1d84ad94
LP		 377 } else if (proc_cmdline_key_streq(key, "systemd.confirm_spawn")) {
378 char *s;
7d5ceb64 379
1d84ad94 380 r = parse_confirm_spawn(value, &s);
059cb385 381 if (r < 0)
7d5ceb64 382 log_warning_errno(r, "Failed to parse confirm_spawn switch %s. Ignoring.", value);
1d84ad94
LP		 383 else {
384 free(arg_confirm_spawn);
385 arg_confirm_spawn = s;
386 }
601f6a1e 387
2a12e32e
JK		 388 } else if (proc_cmdline_key_streq(key, "systemd.service_watchdogs")) {
389
390 r = value ? parse_boolean(value) : true;
391 if (r < 0)
392 log_warning("Failed to parse service watchdog switch %s. Ignoring.", value);
393 else
394 arg_service_watchdogs = r;
395
1d84ad94 396 } else if (proc_cmdline_key_streq(key, "systemd.show_status")) {
9e58ff9c 397
1d84ad94
LP		 398 if (value) {
399 r = parse_show_status(value, &arg_show_status);
400 if (r < 0)
401 log_warning("Failed to parse show status switch %s. Ignoring.", value);
402 } else
403 arg_show_status = SHOW_STATUS_YES;
059cb385 404
1d84ad94
LP		 405 } else if (proc_cmdline_key_streq(key, "systemd.default_standard_output")) {
406
407 if (proc_cmdline_value_missing(key, value))
408 return 0;
0a494f1f 409
059cb385 410 r = exec_output_from_string(value);
fb472900 411 if (r < 0)
059cb385 412 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
0a494f1f
LP		 413 else
414 arg_default_std_output = r;
0a494f1f 415
1d84ad94
LP		 416 } else if (proc_cmdline_key_streq(key, "systemd.default_standard_error")) {
417
418 if (proc_cmdline_value_missing(key, value))
419 return 0;
059cb385
LP		 420
421 r = exec_output_from_string(value);
fb472900 422 if (r < 0)
059cb385 423 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
0a494f1f
LP		 424 else
425 arg_default_std_error = r;
9e7c5357 426
1d84ad94
LP		 427 } else if (streq(key, "systemd.setenv")) {
428
429 if (proc_cmdline_value_missing(key, value))
430 return 0;
059cb385
LP		 431
432 if (env_assignment_is_valid(value)) {
e21fea24
KS		 433 char **env;
434
059cb385 435 env = strv_env_set(arg_default_environment, value);
1d84ad94
LP		 436 if (!env)
437 return log_oom();
438
439 arg_default_environment = env;
e21fea24 440 } else
059cb385 441 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
9e58ff9c 442
1d84ad94
LP		 443 } else if (proc_cmdline_key_streq(key, "systemd.machine_id")) {
444
445 if (proc_cmdline_value_missing(key, value))
446 return 0;
447
448 r = set_machine_id(value);
449 if (r < 0)
450 log_warning("MachineID '%s' is not valid. Ignoring.", value);
ee48dbd5 451
1d84ad94
LP		 452 } else if (proc_cmdline_key_streq(key, "systemd.default_timeout_start_sec")) {
453
454 if (proc_cmdline_value_missing(key, value))
455 return 0;
456
457 r = parse_sec(value, &arg_default_timeout_start_usec);
458 if (r < 0)
459 log_warning_errno(r, "Failed to parse default start timeout: %s, ignoring.", value);
460
461 if (arg_default_timeout_start_usec <= 0)
462 arg_default_timeout_start_usec = USEC_INFINITY;
ee48dbd5 463
8a2c1fbf
EJ		 464 } else if (proc_cmdline_key_streq(key, "systemd.watchdog_device")) {
465
466 if (proc_cmdline_value_missing(key, value))
467 return 0;
468
469 parse_path_argument_and_warn(value, false, &arg_watchdog_device);
470
059cb385 471 } else if (streq(key, "quiet") && !value) {
d7b15e0a 472
7a293242 473 if (arg_show_status == _SHOW_STATUS_INVALID)
d450b6f2 474 arg_show_status = SHOW_STATUS_AUTO;
059cb385
LP		 475
476 } else if (streq(key, "debug") && !value) {
d7b15e0a 477
1de1c9c3
LP		 478 /* Note that log_parse_environment() handles 'debug'
479 * too, and sets the log level to LOG_DEBUG. */
d7b15e0a 480
75f86906 481 if (detect_container() > 0)
b2103dcc 482 log_set_target(LOG_TARGET_CONSOLE);
059cb385 483
dcd61450 484 } else if (!value) {
e2c9a131 485 const char *target;
f170852a
LP		 486
487 /* SysV compatibility */
e2c9a131
EV		 488 target = runlevel_to_target(key);
489 if (target)
490 return free_and_strdup(&arg_default_unit, target);
f170852a
LP		 491 }
492
493 return 0;
494}
495
e8e581bf
ZJS		 496#define DEFINE_SETTER(name, func, descr) \
497 static int name(const char *unit, \
498 const char *filename, \
499 unsigned line, \
500 const char *section, \
71a61510 501 unsigned section_line, \
e8e581bf
ZJS		 502 const char *lvalue, \
503 int ltype, \
504 const char *rvalue, \
505 void *data, \
506 void *userdata) { \
507 \
508 int r; \
509 \
510 assert(filename); \
511 assert(lvalue); \
512 assert(rvalue); \
513 \
514 r = func(rvalue); \
515 if (r < 0) \
d1cefe0a
LP		 516 log_syntax(unit, LOG_ERR, filename, line, r, \
517 "Invalid " descr "'%s': %m", \
518 rvalue); \
e8e581bf
ZJS		 519 \
520 return 0; \
521 }
487393e9 522
a6ecbf83
FB		 523DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level");
524DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target");
525DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" );
526DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location");
487393e9 527
4d7213b2
LP		 528static int config_parse_cpu_affinity2(
529 const char *unit,
530 const char *filename,
531 unsigned line,
532 const char *section,
533 unsigned section_line,
534 const char *lvalue,
535 int ltype,
536 const char *rvalue,
537 void *data,
538 void *userdata) {
487393e9 539
4b40bc38 540 _cleanup_cpu_free_ cpu_set_t *c = NULL;
f5c72b73 541 int ncpus;
487393e9 542
765d143b 543 ncpus = parse_cpu_set_and_warn(rvalue, &c, unit, filename, line, lvalue);
f5c72b73
FB		 544 if (ncpus < 0)
545 return ncpus;
487393e9 546
f5c72b73 547 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
25f027c5 548 log_warning_errno(errno, "Failed to set CPU affinity: %m");
487393e9 549
487393e9
LP		 550 return 0;
551}
552
4d7213b2
LP		 553static int config_parse_show_status(
554 const char* unit,
555 const char *filename,
556 unsigned line,
557 const char *section,
558 unsigned section_line,
559 const char *lvalue,
560 int ltype,
561 const char *rvalue,
562 void *data,
563 void *userdata) {
564
565 int k;
566 ShowStatus *b = data;
567
568 assert(filename);
569 assert(lvalue);
570 assert(rvalue);
571 assert(data);
572
573 k = parse_show_status(rvalue, b);
574 if (k < 0) {
12ca818f 575 log_syntax(unit, LOG_ERR, filename, line, k, "Failed to parse show status setting, ignoring: %s", rvalue);
4d7213b2
LP		 576 return 0;
577 }
578
579 return 0;
580}
581
5db98187
LP		 582static int config_parse_output_restricted(
583 const char* unit,
584 const char *filename,
585 unsigned line,
586 const char *section,
587 unsigned section_line,
588 const char *lvalue,
589 int ltype,
590 const char *rvalue,
591 void *data,
592 void *userdata) {
593
594 ExecOutput t, *eo = data;
595
596 assert(filename);
597 assert(lvalue);
598 assert(rvalue);
599 assert(data);
600
601 t = exec_output_from_string(rvalue);
602 if (t < 0) {
603 log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse output type, ignoring: %s", rvalue);
604 return 0;
605 }
606
566b7d23
ZD		 607 if (IN_SET(t, EXEC_OUTPUT_SOCKET, EXEC_OUTPUT_NAMED_FD, EXEC_OUTPUT_FILE, EXEC_OUTPUT_FILE_APPEND)) {
608 log_syntax(unit, LOG_ERR, filename, line, 0, "Standard output types socket, fd:, file:, append: are not supported as defaults, ignoring: %s", rvalue);
5db98187
LP		 609 return 0;
610 }
611
612 *eo = t;
613 return 0;
614}
615
b9e74c39
LP		 616static int config_parse_crash_chvt(
617 const char* unit,
618 const char *filename,
619 unsigned line,
620 const char *section,
621 unsigned section_line,
622 const char *lvalue,
623 int ltype,
624 const char *rvalue,
625 void *data,
626 void *userdata) {
627
628 int r;
629
630 assert(filename);
631 assert(lvalue);
632 assert(rvalue);
b9e74c39
LP		 633
634 r = parse_crash_chvt(rvalue);
635 if (r < 0) {
636 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse CrashChangeVT= setting, ignoring: %s", rvalue);
637 return 0;
638 }
639
640 return 0;
641}
642
487393e9
LP		 643static int parse_config_file(void) {
644
f975e971 645 const ConfigTableItem items[] = {
d3b1c508
LP		 646 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
647 { "Manager", "LogTarget", config_parse_target, 0, NULL },
648 { "Manager", "LogColor", config_parse_color, 0, NULL },
649 { "Manager", "LogLocation", config_parse_location, 0, NULL },
650 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
b9e74c39
LP		 651 { "Manager", "CrashChVT", /* legacy */ config_parse_crash_chvt, 0, NULL },
652 { "Manager", "CrashChangeVT", config_parse_crash_chvt, 0, NULL },
d3b1c508 653 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
b9e74c39 654 { "Manager", "CrashReboot", config_parse_bool, 0, &arg_crash_reboot },
d3b1c508 655 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
d3b1c508
LP		 656 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
657 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
658 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
659 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
8a2c1fbf 660 { "Manager", "WatchdogDevice", config_parse_path, 0, &arg_watchdog_device },
a103496c 661 { "Manager", "CapabilityBoundingSet", config_parse_capability_set, 0, &arg_capability_bounding_set },
39362f6f 662 { "Manager", "NoNewPrivileges", config_parse_bool, 0, &arg_no_new_privs },
349cc4a5 663#if HAVE_SECCOMP
d3b1c508 664 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
89fffa27 665#endif
d3b1c508 666 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
bd8f585b 667 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
5db98187
LP		 668 { "Manager", "DefaultStandardOutput", config_parse_output_restricted,0, &arg_default_std_output },
669 { "Manager", "DefaultStandardError", config_parse_output_restricted,0, &arg_default_std_error },
d3b1c508
LP		 670 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
671 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
672 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
f0367da7
LP		 673 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval }, /* obsolete alias */
674 { "Manager", "DefaultStartLimitIntervalSec",config_parse_sec, 0, &arg_default_start_limit_interval },
d3b1c508
LP		 675 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
676 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
4f424df7
LP		 677 { "Manager", "DefaultLimitCPU", config_parse_rlimit, RLIMIT_CPU, arg_default_rlimit },
678 { "Manager", "DefaultLimitFSIZE", config_parse_rlimit, RLIMIT_FSIZE, arg_default_rlimit },
679 { "Manager", "DefaultLimitDATA", config_parse_rlimit, RLIMIT_DATA, arg_default_rlimit },
680 { "Manager", "DefaultLimitSTACK", config_parse_rlimit, RLIMIT_STACK, arg_default_rlimit },
681 { "Manager", "DefaultLimitCORE", config_parse_rlimit, RLIMIT_CORE, arg_default_rlimit },
682 { "Manager", "DefaultLimitRSS", config_parse_rlimit, RLIMIT_RSS, arg_default_rlimit },
683 { "Manager", "DefaultLimitNOFILE", config_parse_rlimit, RLIMIT_NOFILE, arg_default_rlimit },
684 { "Manager", "DefaultLimitAS", config_parse_rlimit, RLIMIT_AS, arg_default_rlimit },
685 { "Manager", "DefaultLimitNPROC", config_parse_rlimit, RLIMIT_NPROC, arg_default_rlimit },
686 { "Manager", "DefaultLimitMEMLOCK", config_parse_rlimit, RLIMIT_MEMLOCK, arg_default_rlimit },
687 { "Manager", "DefaultLimitLOCKS", config_parse_rlimit, RLIMIT_LOCKS, arg_default_rlimit },
688 { "Manager", "DefaultLimitSIGPENDING", config_parse_rlimit, RLIMIT_SIGPENDING, arg_default_rlimit },
689 { "Manager", "DefaultLimitMSGQUEUE", config_parse_rlimit, RLIMIT_MSGQUEUE, arg_default_rlimit },
690 { "Manager", "DefaultLimitNICE", config_parse_rlimit, RLIMIT_NICE, arg_default_rlimit },
691 { "Manager", "DefaultLimitRTPRIO", config_parse_rlimit, RLIMIT_RTPRIO, arg_default_rlimit },
692 { "Manager", "DefaultLimitRTTIME", config_parse_rlimit, RLIMIT_RTTIME, arg_default_rlimit },
085afe36 693 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
13c31542 694 { "Manager", "DefaultIOAccounting", config_parse_bool, 0, &arg_default_io_accounting },
377bfd2d 695 { "Manager", "DefaultIPAccounting", config_parse_bool, 0, &arg_default_ip_accounting },
085afe36
LP		 696 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
697 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
03a7b521 698 { "Manager", "DefaultTasksAccounting", config_parse_bool, 0, &arg_default_tasks_accounting },
0af20ea2 699 { "Manager", "DefaultTasksMax", config_parse_tasks_max, 0, &arg_default_tasks_max },
ae8c7939 700 { "Manager", "CtrlAltDelBurstAction", config_parse_emergency_action, 0, &arg_cad_burst_action },
d3b1c508 701 {}
487393e9
LP		 702 };
703
1b907b5c 704 const char *fn, *conf_dirs_nulstr;
487393e9 705
463d0d15 706 fn = arg_system ?
75eb6154
LP		 707 PKGSYSCONFDIR "/system.conf" :
708 PKGSYSCONFDIR "/user.conf";
709
463d0d15 710 conf_dirs_nulstr = arg_system ?
75eb6154
LP		 711 CONF_PATHS_NULSTR("systemd/system.conf.d") :
712 CONF_PATHS_NULSTR("systemd/user.conf.d");
713
bcde742e 714 (void) config_parse_many_nulstr(fn, conf_dirs_nulstr, "Manager\0", config_item_table_lookup, items, CONFIG_PARSE_WARN, NULL);
36c16a7c
LP		 715
716 /* Traditionally "0" was used to turn off the default unit timeouts. Fix this up so that we used USEC_INFINITY
717 * like everywhere else. */
718 if (arg_default_timeout_start_usec <= 0)
719 arg_default_timeout_start_usec = USEC_INFINITY;
720 if (arg_default_timeout_stop_usec <= 0)
721 arg_default_timeout_stop_usec = USEC_INFINITY;
487393e9 722
487393e9
LP		 723 return 0;
724}
725
85cb4151 726static void set_manager_defaults(Manager *m) {
06af2a04
TB		 727
728 assert(m);
729
5b65ae15
LP		 730 /* Propagates the various default unit property settings into the manager object, i.e. properties that do not
731 * affect the manager itself, but are just what newly allocated units will have set if they haven't set
732 * anything else. (Also see set_manager_settings() for the settings that affect the manager's own behaviour) */
733
06af2a04
TB		 734 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
735 m->default_std_output = arg_default_std_output;
736 m->default_std_error = arg_default_std_error;
737 m->default_timeout_start_usec = arg_default_timeout_start_usec;
738 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
739 m->default_restart_usec = arg_default_restart_usec;
740 m->default_start_limit_interval = arg_default_start_limit_interval;
741 m->default_start_limit_burst = arg_default_start_limit_burst;
742 m->default_cpu_accounting = arg_default_cpu_accounting;
13c31542 743 m->default_io_accounting = arg_default_io_accounting;
377bfd2d 744 m->default_ip_accounting = arg_default_ip_accounting;
06af2a04
TB		 745 m->default_blockio_accounting = arg_default_blockio_accounting;
746 m->default_memory_accounting = arg_default_memory_accounting;
03a7b521 747 m->default_tasks_accounting = arg_default_tasks_accounting;
0af20ea2 748 m->default_tasks_max = arg_default_tasks_max;
06af2a04
TB		 749
750 manager_set_default_rlimits(m, arg_default_rlimit);
751 manager_environment_add(m, NULL, arg_default_environment);
752}
753
7b46fc6a
LP		 754static void set_manager_settings(Manager *m) {
755
756 assert(m);
757
5b65ae15
LP		 758 /* Propagates the various manager settings into the manager object, i.e. properties that effect the manager
759 * itself (as opposed to just being inherited into newly allocated units, see set_manager_defaults() above). */
760
7b46fc6a 761 m->confirm_spawn = arg_confirm_spawn;
2a12e32e 762 m->service_watchdogs = arg_service_watchdogs;
7b46fc6a
LP		 763 m->runtime_watchdog = arg_runtime_watchdog;
764 m->shutdown_watchdog = arg_shutdown_watchdog;
765 m->cad_burst_action = arg_cad_burst_action;
766
767 manager_set_show_status(m, arg_show_status);
768}
769
f170852a 770static int parse_argv(int argc, char *argv[]) {
f170852a
LP		 771 enum {
772 ARG_LOG_LEVEL = 0x100,
773 ARG_LOG_TARGET,
bbe63281
LP		 774 ARG_LOG_COLOR,
775 ARG_LOG_LOCATION,
2f198e2f 776 ARG_UNIT,
edb9aaa8 777 ARG_SYSTEM,
af2d49f7 778 ARG_USER,
e537352b 779 ARG_TEST,
b87c2aa6 780 ARG_NO_PAGER,
9ba0bc4e 781 ARG_VERSION,
80876c20 782 ARG_DUMP_CONFIGURATION_ITEMS,
bbc1acab 783 ARG_DUMP_BUS_PROPERTIES,
9e58ff9c 784 ARG_DUMP_CORE,
b9e74c39 785 ARG_CRASH_CHVT,
9e58ff9c 786 ARG_CRASH_SHELL,
b9e74c39 787 ARG_CRASH_REBOOT,
a16e1123 788 ARG_CONFIRM_SPAWN,
9e58ff9c 789 ARG_SHOW_STATUS,
4288f619 790 ARG_DESERIALIZE,
2660882b 791 ARG_SWITCHED_ROOT,
0a494f1f 792 ARG_DEFAULT_STD_OUTPUT,
ee48dbd5 793 ARG_DEFAULT_STD_ERROR,
2a12e32e
JK		 794 ARG_MACHINE_ID,
795 ARG_SERVICE_WATCHDOGS,
f170852a
LP		 796 };
797
798 static const struct option options[] = {
a16e1123
LP		 799 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
800 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
bbe63281
LP		 801 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
802 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
2f198e2f 803 { "unit", required_argument, NULL, ARG_UNIT },
edb9aaa8 804 { "system", no_argument, NULL, ARG_SYSTEM },
af2d49f7 805 { "user", no_argument, NULL, ARG_USER },
a16e1123 806 { "test", no_argument, NULL, ARG_TEST },
b87c2aa6 807 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
a16e1123 808 { "help", no_argument, NULL, 'h' },
9ba0bc4e 809 { "version", no_argument, NULL, ARG_VERSION },
a16e1123 810 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
bbc1acab 811 { "dump-bus-properties", no_argument, NULL, ARG_DUMP_BUS_PROPERTIES },
a5d87bf0 812 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
b9e74c39 813 { "crash-chvt", required_argument, NULL, ARG_CRASH_CHVT },
a5d87bf0 814 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
b9e74c39 815 { "crash-reboot", optional_argument, NULL, ARG_CRASH_REBOOT },
a5d87bf0 816 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
6e98720f 817 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
a16e1123 818 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
2660882b 819 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
0a494f1f
LP		 820 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
821 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
ee48dbd5 822 { "machine-id", required_argument, NULL, ARG_MACHINE_ID },
2a12e32e 823 { "service-watchdogs", required_argument, NULL, ARG_SERVICE_WATCHDOGS },
fb472900 824 {}
f170852a
LP		 825 };
826
827 int c, r;
828
829 assert(argc >= 1);
830 assert(argv);
831
df0ff127 832 if (getpid_cached() == 1)
b770165a
LP		 833 opterr = 0;
834
099663ff 835 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
f170852a
LP		 836
837 switch (c) {
838
839 case ARG_LOG_LEVEL:
fb472900 840 r = log_set_max_level_from_string(optarg);
2b5107e1
ZJS		 841 if (r < 0)
842 return log_error_errno(r, "Failed to parse log level \"%s\": %m", optarg);
f170852a
LP		 843
844 break;
845
846 case ARG_LOG_TARGET:
fb472900 847 r = log_set_target_from_string(optarg);
2b5107e1
ZJS		 848 if (r < 0)
849 return log_error_errno(r, "Failed to parse log target \"%s\": %m", optarg);
f170852a
LP		 850
851 break;
852
bbe63281
LP		 853 case ARG_LOG_COLOR:
854
d0b170c8 855 if (optarg) {
fb472900 856 r = log_show_color_from_string(optarg);
2b5107e1
ZJS		 857 if (r < 0)
858 return log_error_errno(r, "Failed to parse log color setting \"%s\": %m",
859 optarg);
d0b170c8
LP		 860 } else
861 log_show_color(true);
bbe63281
LP		 862
863 break;
864
865 case ARG_LOG_LOCATION:
d0b170c8 866 if (optarg) {
fb472900 867 r = log_show_location_from_string(optarg);
2b5107e1
ZJS		 868 if (r < 0)
869 return log_error_errno(r, "Failed to parse log location setting \"%s\": %m",
870 optarg);
d0b170c8
LP		 871 } else
872 log_show_location(true);
bbe63281
LP		 873
874 break;
875
0a494f1f 876 case ARG_DEFAULT_STD_OUTPUT:
fb472900 877 r = exec_output_from_string(optarg);
2b5107e1
ZJS		 878 if (r < 0)
879 return log_error_errno(r, "Failed to parse default standard output setting \"%s\": %m",
880 optarg);
881 arg_default_std_output = r;
0a494f1f
LP		 882 break;
883
884 case ARG_DEFAULT_STD_ERROR:
fb472900 885 r = exec_output_from_string(optarg);
2b5107e1
ZJS		 886 if (r < 0)
887 return log_error_errno(r, "Failed to parse default standard error output setting \"%s\": %m",
888 optarg);
889 arg_default_std_error = r;
0a494f1f
LP		 890 break;
891
2f198e2f 892 case ARG_UNIT:
e6e242ad 893 r = free_and_strdup(&arg_default_unit, optarg);
23bbb0de 894 if (r < 0)
2b5107e1 895 return log_error_errno(r, "Failed to set default unit \"%s\": %m", optarg);
f170852a
LP		 896
897 break;
898
edb9aaa8 899 case ARG_SYSTEM:
463d0d15 900 arg_system = true;
edb9aaa8 901 break;
a5dab5ce 902
af2d49f7 903 case ARG_USER:
463d0d15 904 arg_system = false;
a5dab5ce 905 break;
a5dab5ce 906
e965d56d 907 case ARG_TEST:
fa0f4d8a 908 arg_action = ACTION_TEST;
b87c2aa6
ZJS		 909 break;
910
911 case ARG_NO_PAGER:
912 arg_no_pager = true;
e965d56d
LP		 913 break;
914
9ba0bc4e
ZJS		 915 case ARG_VERSION:
916 arg_action = ACTION_VERSION;
917 break;
918
e537352b 919 case ARG_DUMP_CONFIGURATION_ITEMS:
fa0f4d8a 920 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
e537352b
LP		 921 break;
922
bbc1acab
YW		 923 case ARG_DUMP_BUS_PROPERTIES:
924 arg_action = ACTION_DUMP_BUS_PROPERTIES;
925 break;
926
9e58ff9c 927 case ARG_DUMP_CORE:
b9e74c39
LP		 928 if (!optarg)
929 arg_dump_core = true;
930 else {
931 r = parse_boolean(optarg);
932 if (r < 0)
2b5107e1
ZJS		 933 return log_error_errno(r, "Failed to parse dump core boolean: \"%s\": %m",
934 optarg);
b9e74c39 935 arg_dump_core = r;
a5d87bf0 936 }
b9e74c39
LP		 937 break;
938
939 case ARG_CRASH_CHVT:
940 r = parse_crash_chvt(optarg);
941 if (r < 0)
2b5107e1
ZJS		 942 return log_error_errno(r, "Failed to parse crash virtual terminal index: \"%s\": %m",
943 optarg);
9e58ff9c
LP		 944 break;
945
946 case ARG_CRASH_SHELL:
b9e74c39
LP		 947 if (!optarg)
948 arg_crash_shell = true;
949 else {
950 r = parse_boolean(optarg);
951 if (r < 0)
2b5107e1
ZJS		 952 return log_error_errno(r, "Failed to parse crash shell boolean: \"%s\": %m",
953 optarg);
b9e74c39
LP		 954 arg_crash_shell = r;
955 }
956 break;
957
958 case ARG_CRASH_REBOOT:
959 if (!optarg)
960 arg_crash_reboot = true;
961 else {
962 r = parse_boolean(optarg);
963 if (r < 0)
2b5107e1
ZJS		 964 return log_error_errno(r, "Failed to parse crash shell boolean: \"%s\": %m",
965 optarg);
b9e74c39 966 arg_crash_reboot = r;
a5d87bf0 967 }
9e58ff9c
LP		 968 break;
969
80876c20 970 case ARG_CONFIRM_SPAWN:
7d5ceb64
FB		 971 arg_confirm_spawn = mfree(arg_confirm_spawn);
972
973 r = parse_confirm_spawn(optarg, &arg_confirm_spawn);
974 if (r < 0)
2b5107e1
ZJS		 975 return log_error_errno(r, "Failed to parse confirm spawn option: \"%s\": %m",
976 optarg);
80876c20
LP		 977 break;
978
2a12e32e
JK		 979 case ARG_SERVICE_WATCHDOGS:
980 r = parse_boolean(optarg);
981 if (r < 0)
2b5107e1
ZJS		 982 return log_error_errno(r, "Failed to parse service watchdogs boolean: \"%s\": %m",
983 optarg);
2a12e32e
JK		 984 arg_service_watchdogs = r;
985 break;
986
9e58ff9c 987 case ARG_SHOW_STATUS:
d450b6f2
ZJS		 988 if (optarg) {
989 r = parse_show_status(optarg, &arg_show_status);
ac7ec288 990 if (r < 0)
2b5107e1
ZJS		 991 return log_error_errno(r, "Failed to parse show status boolean: \"%s\": %m",
992 optarg);
d450b6f2
ZJS		 993 } else
994 arg_show_status = SHOW_STATUS_YES;
6e98720f 995 break;
a5d87bf0 996
a16e1123
LP		 997 case ARG_DESERIALIZE: {
998 int fd;
999 FILE *f;
1000
01e10de3 1001 r = safe_atoi(optarg, &fd);
2b5107e1
ZJS		 1002 if (r < 0)
1003 log_error_errno(r, "Failed to parse deserialize option \"%s\": %m", optarg);
1004 if (fd < 0) {
1005 log_error("Invalid deserialize fd: %d", fd);
b9e74c39 1006 return -EINVAL;
a16e1123
LP		 1007 }
1008
b9e74c39 1009 (void) fd_cloexec(fd, true);
01e10de3
LP		 1010
1011 f = fdopen(fd, "r");
4a62c710 1012 if (!f)
2b5107e1 1013 return log_error_errno(errno, "Failed to open serialization fd %d: %m", fd);
a16e1123 1014
74ca738f 1015 safe_fclose(arg_serialization);
d3b1c508 1016 arg_serialization = f;
a16e1123
LP		 1017
1018 break;
1019 }
1020
2660882b 1021 case ARG_SWITCHED_ROOT:
bf4df7c3 1022 arg_switched_root = true;
d03bc1b8
HH		 1023 break;
1024
ee48dbd5
NC		 1025 case ARG_MACHINE_ID:
1026 r = set_machine_id(optarg);
54500613 1027 if (r < 0)
2b5107e1 1028 return log_error_errno(r, "MachineID '%s' is not valid: %m", optarg);
ee48dbd5
NC		 1029 break;
1030
f170852a 1031 case 'h':
fa0f4d8a 1032 arg_action = ACTION_HELP;
f170852a
LP		 1033 break;
1034
1d2e23ab
LP		 1035 case 'D':
1036 log_set_max_level(LOG_DEBUG);
1037 break;
1038
099663ff
LP		 1039 case 'b':
1040 case 's':
1041 case 'z':
1042 /* Just to eat away the sysvinit kernel
1043 * cmdline args without getopt() error
1044 * messages that we'll parse in
1045 * parse_proc_cmdline_word() or ignore. */
f170852a 1046
099663ff 1047 case '?':
df0ff127 1048 if (getpid_cached() != 1)
099663ff 1049 return -EINVAL;
601185b4
ZJS		 1050 else
1051 return 0;
099663ff 1052
601185b4
ZJS		 1053 default:
1054 assert_not_reached("Unhandled option code.");
f170852a
LP		 1055 }
1056
df0ff127 1057 if (optind < argc && getpid_cached() != 1) {
d821e6d6
LP		 1058 /* Hmm, when we aren't run as init system
1059 * let's complain about excess arguments */
1060
1061 log_error("Excess arguments.");
1062 return -EINVAL;
1063 }
1064
f170852a
LP		 1065 return 0;
1066}
1067
1068static int help(void) {
1069
2e33c433 1070 printf("%s [OPTIONS...]\n\n"
af2d49f7 1071 "Starts up and maintains the system or user services.\n\n"
e537352b 1072 " -h --help Show this help\n"
cb4069d9 1073 " --version Show version\n"
e537352b 1074 " --test Determine startup sequence, dump it and exit\n"
b87c2aa6 1075 " --no-pager Do not pipe output into a pager\n"
80876c20 1076 " --dump-configuration-items Dump understood unit configuration items\n"
bbc1acab 1077 " --dump-bus-properties Dump exposed bus properties\n"
9e58ff9c 1078 " --unit=UNIT Set default unit\n"
edb9aaa8 1079 " --system Run a system instance, even if PID != 1\n"
af2d49f7 1080 " --user Run a user instance\n"
b9e74c39
LP		 1081 " --dump-core[=BOOL] Dump core on crash\n"
1082 " --crash-vt=NR Change to specified VT on crash\n"
1083 " --crash-reboot[=BOOL] Reboot on crash\n"
1084 " --crash-shell[=BOOL] Run shell on crash\n"
1085 " --confirm-spawn[=BOOL] Ask for confirmation when spawning processes\n"
1086 " --show-status[=BOOL] Show status updates on the console during bootup\n"
c1dc6153 1087 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
9e58ff9c 1088 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
b9e74c39
LP		 1089 " --log-color[=BOOL] Highlight important log messages\n"
1090 " --log-location[=BOOL] Include code location in log messages\n"
0a494f1f
LP		 1091 " --default-standard-output= Set default standard output for services\n"
1092 " --default-standard-error= Set default standard error output for services\n",
5b6319dc 1093 program_invocation_short_name);
f170852a
LP		 1094
1095 return 0;
1096}
1097
b3680f49 1098static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
48b90859
LP		 1099 _cleanup_fdset_free_ FDSet *fds = NULL;
1100 _cleanup_fclose_ FILE *f = NULL;
a16e1123
LP		 1101 int r;
1102
1103 assert(m);
1104 assert(_f);
1105 assert(_fds);
1106
6b78f9b4 1107 r = manager_open_serialization(m, &f);
48b90859
LP		 1108 if (r < 0)
1109 return log_error_errno(r, "Failed to create serialization file: %m");
a16e1123 1110
71445ae7 1111 /* Make sure nothing is really destructed when we shut down */
313cefa1 1112 m->n_reloading++;
718db961 1113 bus_manager_send_reloading(m, true);
71445ae7 1114
6b78f9b4 1115 fds = fdset_new();
48b90859
LP		 1116 if (!fds)
1117 return log_oom();
a16e1123 1118
b3680f49 1119 r = manager_serialize(m, f, fds, switching_root);
48b90859
LP		 1120 if (r < 0)
1121 return log_error_errno(r, "Failed to serialize state: %m");
a16e1123 1122
48b90859
LP		 1123 if (fseeko(f, 0, SEEK_SET) == (off_t) -1)
1124 return log_error_errno(errno, "Failed to rewind serialization fd: %m");
a16e1123 1125
6b78f9b4 1126 r = fd_cloexec(fileno(f), false);
48b90859
LP		 1127 if (r < 0)
1128 return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m");
a16e1123 1129
6b78f9b4 1130 r = fdset_cloexec(fds, false);
48b90859
LP		 1131 if (r < 0)
1132 return log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m");
a16e1123 1133
1cc6c93a
YW		 1134 *_f = TAKE_PTR(f);
1135 *_fds = TAKE_PTR(fds);
a16e1123 1136
48b90859 1137 return 0;
a16e1123
LP		 1138}
1139
4096d6f5 1140static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
9264cc39 1141 int r, nr;
4096d6f5
LP		 1142
1143 assert(saved_rlimit);
1144
1145 /* Save the original RLIMIT_NOFILE so that we can reset it
1146 * later when transitioning from the initrd to the main
1147 * systemd or suchlike. */
4a62c710 1148 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0)
3ce40911 1149 return log_warning_errno(errno, "Reading RLIMIT_NOFILE failed, ignoring: %m");
4096d6f5
LP		 1150
1151 /* Make sure forked processes get the default kernel setting */
1152 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1153 struct rlimit *rl;
1154
1155 rl = newdup(struct rlimit, saved_rlimit, 1);
1156 if (!rl)
1157 return log_oom();
1158
1159 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1160 }
1161
9264cc39
LP		 1162 /* Bump up the resource limit for ourselves substantially, all the way to the maximum the kernel allows */
1163 nr = read_nr_open();
1164 r = setrlimit_closest(RLIMIT_NOFILE, &RLIMIT_MAKE_CONST(nr));
23bbb0de 1165 if (r < 0)
3ce40911 1166 return log_warning_errno(r, "Setting RLIMIT_NOFILE failed, ignoring: %m");
4096d6f5
LP		 1167
1168 return 0;
1169}
1170
fb3ae275
LP		 1171static int bump_rlimit_memlock(struct rlimit *saved_rlimit) {
1172 int r;
1173
1174 assert(saved_rlimit);
1175 assert(getuid() == 0);
1176
1177 /* BPF_MAP_TYPE_LPM_TRIE bpf maps are charged against RLIMIT_MEMLOCK, even though we have CAP_IPC_LOCK which
1178 * should normally disable such checks. We need them to implement IPAccessAllow= and IPAccessDeny=, hence let's
1179 * bump the value high enough for the root user. */
1180
1181 if (getrlimit(RLIMIT_MEMLOCK, saved_rlimit) < 0)
1182 return log_warning_errno(errno, "Reading RLIMIT_MEMLOCK failed, ignoring: %m");
1183
1184 r = setrlimit_closest(RLIMIT_MEMLOCK, &RLIMIT_MAKE_CONST(1024ULL*1024ULL*16ULL));
1185 if (r < 0)
1186 return log_warning_errno(r, "Setting RLIMIT_MEMLOCK failed, ignoring: %m");
1187
1188 return 0;
1189}
1190
80758717 1191static void test_usr(void) {
80758717 1192
ed1c99fc 1193 /* Check that /usr is not a separate fs */
80758717 1194
871c44a7
LP		 1195 if (dir_is_empty("/usr") <= 0)
1196 return;
1197
8b173b5e 1198 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
871c44a7
LP		 1199 "Some things will probably break (sometimes even silently) in mysterious ways. "
1200 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1201}
1202
d3b1c508 1203static int enforce_syscall_archs(Set *archs) {
349cc4a5 1204#if HAVE_SECCOMP
d3b1c508
LP		 1205 int r;
1206
83f12b27
FS		 1207 if (!is_seccomp_available())
1208 return 0;
1209
469830d1 1210 r = seccomp_restrict_archs(arg_syscall_archs);
d3b1c508 1211 if (r < 0)
469830d1 1212 return log_error_errno(r, "Failed to enforce system call architecture restrication: %m");
d3b1c508 1213#endif
469830d1 1214 return 0;
d3b1c508
LP		 1215}
1216
b6e2f329
LP		 1217static int status_welcome(void) {
1218 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1219 int r;
1220
7a293242 1221 if (IN_SET(arg_show_status, SHOW_STATUS_NO, SHOW_STATUS_AUTO))
fd8c85c6
LP		 1222 return 0;
1223
d58ad743
LP		 1224 r = parse_os_release(NULL,
1225 "PRETTY_NAME", &pretty_name,
1226 "ANSI_COLOR", &ansi_color,
1227 NULL);
1228 if (r < 0)
1229 log_full_errno(r == -ENOENT ? LOG_DEBUG : LOG_WARNING, r,
1230 "Failed to read os-release file, ignoring: %m");
b6e2f329 1231
dc9b5816
ZJS		 1232 if (log_get_show_color())
1233 return status_printf(NULL, false, false,
1234 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1235 isempty(ansi_color) ? "1" : ansi_color,
1236 isempty(pretty_name) ? "Linux" : pretty_name);
1237 else
1238 return status_printf(NULL, false, false,
1239 "\nWelcome to %s!\n",
1240 isempty(pretty_name) ? "Linux" : pretty_name);
b6e2f329
LP		 1241}
1242
fdd25311
LP		 1243static int write_container_id(void) {
1244 const char *c;
19854865 1245 int r;
fdd25311
LP		 1246
1247 c = getenv("container");
1248 if (isempty(c))
1249 return 0;
1250
8612da97
LP		 1251 RUN_WITH_UMASK(0022)
1252 r = write_string_file("/run/systemd/container", c, WRITE_STRING_FILE_CREATE);
19854865 1253 if (r < 0)
f1f849b0 1254 return log_warning_errno(r, "Failed to write /run/systemd/container, ignoring: %m");
19854865
LP		 1255
1256 return 1;
1257}
1258
1259static int bump_unix_max_dgram_qlen(void) {
1260 _cleanup_free_ char *qlen = NULL;
1261 unsigned long v;
1262 int r;
1263
3130fca5
LP		 1264 /* Let's bump the net.unix.max_dgram_qlen sysctl. The kernel default of 16 is simply too low. We set the value
1265 * really really early during boot, so that it is actually applied to all our sockets, including the
1266 * $NOTIFY_SOCKET one. */
19854865
LP		 1267
1268 r = read_one_line_file("/proc/sys/net/unix/max_dgram_qlen", &qlen);
1269 if (r < 0)
1270 return log_warning_errno(r, "Failed to read AF_UNIX datagram queue length, ignoring: %m");
1271
1272 r = safe_atolu(qlen, &v);
1273 if (r < 0)
3130fca5 1274 return log_warning_errno(r, "Failed to parse AF_UNIX datagram queue length '%s', ignoring: %m", qlen);
19854865
LP		 1275
1276 if (v >= DEFAULT_UNIX_MAX_DGRAM_QLEN)
1277 return 0;
1278
3130fca5 1279 r = write_string_filef("/proc/sys/net/unix/max_dgram_qlen", 0, "%lu", DEFAULT_UNIX_MAX_DGRAM_QLEN);
19854865
LP		 1280 if (r < 0)
1281 return log_full_errno(IN_SET(r, -EROFS, -EPERM, -EACCES) ? LOG_DEBUG : LOG_WARNING, r,
1282 "Failed to bump AF_UNIX datagram queue length, ignoring: %m");
1283
1284 return 1;
fdd25311
LP		 1285}
1286
32391275
FB		 1287static int fixup_environment(void) {
1288 _cleanup_free_ char *term = NULL;
4dc63c4b 1289 const char *t;
32391275
FB		 1290 int r;
1291
43db615b
LP		 1292 /* Only fix up the environment when we are started as PID 1 */
1293 if (getpid_cached() != 1)
1294 return 0;
1295
1296 /* We expect the environment to be set correctly if run inside a container. */
84af7821
LP		 1297 if (detect_container() > 0)
1298 return 0;
1299
43db615b
LP		 1300 /* When started as PID1, the kernel uses /dev/console for our stdios and uses TERM=linux whatever the backend
1301 * device used by the console. We try to make a better guess here since some consoles might not have support
1302 * for color mode for example.
32391275 1303 *
43db615b 1304 * However if TERM was configured through the kernel command line then leave it alone. */
1d84ad94 1305 r = proc_cmdline_get_key("TERM", 0, &term);
32391275
FB		 1306 if (r < 0)
1307 return r;
32391275 1308
4dc63c4b
LP		 1309 t = term ?: default_term_for_tty("/dev/console");
1310
1311 if (setenv("TERM", t, 1) < 0)
32391275
FB		 1312 return -errno;
1313
1314 return 0;
1315}
1316
6808a0bc
LP		 1317static void redirect_telinit(int argc, char *argv[]) {
1318
1319 /* This is compatibility support for SysV, where calling init as a user is identical to telinit. */
1320
1321#if HAVE_SYSV_COMPAT
1322 if (getpid_cached() == 1)
1323 return;
1324
1325 if (!strstr(program_invocation_short_name, "init"))
1326 return;
1327
1328 execv(SYSTEMCTL_BINARY_PATH, argv);
1329 log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
a45d7127 1330 exit(EXIT_FAILURE);
6808a0bc
LP		 1331#endif
1332}
1333
4a36297c
LP		 1334static int become_shutdown(
1335 const char *shutdown_verb,
7eb35049 1336 int retval) {
4a36297c
LP		 1337
1338 char log_level[DECIMAL_STR_MAX(int) + 1],
e73c54b8
JK		 1339 exit_code[DECIMAL_STR_MAX(uint8_t) + 1],
1340 timeout[DECIMAL_STR_MAX(usec_t) + 1];
4a36297c 1341
e73c54b8 1342 const char* command_line[13] = {
4a36297c
LP		 1343 SYSTEMD_SHUTDOWN_BINARY_PATH,
1344 shutdown_verb,
e73c54b8 1345 "--timeout", timeout,
4a36297c
LP		 1346 "--log-level", log_level,
1347 "--log-target",
1348 };
1349
1350 _cleanup_strv_free_ char **env_block = NULL;
e73c54b8 1351 size_t pos = 7;
4a36297c
LP		 1352 int r;
1353
7eb35049 1354 assert(shutdown_verb);
234519ae 1355 assert(!command_line[pos]);
4a36297c
LP		 1356 env_block = strv_copy(environ);
1357
1358 xsprintf(log_level, "%d", log_get_max_level());
e73c54b8 1359 xsprintf(timeout, "%" PRI_USEC "us", arg_default_timeout_stop_usec);
4a36297c
LP		 1360
1361 switch (log_get_target()) {
1362
1363 case LOG_TARGET_KMSG:
1364 case LOG_TARGET_JOURNAL_OR_KMSG:
1365 case LOG_TARGET_SYSLOG_OR_KMSG:
1366 command_line[pos++] = "kmsg";
1367 break;
1368
1369 case LOG_TARGET_NULL:
1370 command_line[pos++] = "null";
1371 break;
1372
1373 case LOG_TARGET_CONSOLE:
1374 default:
1375 command_line[pos++] = "console";
1376 break;
1377 };
1378
1379 if (log_get_show_color())
1380 command_line[pos++] = "--log-color";
1381
1382 if (log_get_show_location())
1383 command_line[pos++] = "--log-location";
1384
1385 if (streq(shutdown_verb, "exit")) {
1386 command_line[pos++] = "--exit-code";
1387 command_line[pos++] = exit_code;
1388 xsprintf(exit_code, "%d", retval);
1389 }
1390
1391 assert(pos < ELEMENTSOF(command_line));
1392
7eb35049
LP		 1393 if (streq(shutdown_verb, "reboot") &&
1394 arg_shutdown_watchdog > 0 &&
1395 arg_shutdown_watchdog != USEC_INFINITY) {
1396
4a36297c
LP		 1397 char *e;
1398
1399 /* If we reboot let's set the shutdown
1400 * watchdog and tell the shutdown binary to
1401 * repeatedly ping it */
1402 r = watchdog_set_timeout(&arg_shutdown_watchdog);
1403 watchdog_close(r < 0);
1404
1405 /* Tell the binary how often to ping, ignore failure */
1406 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
8a2c1fbf
EJ		 1407 (void) strv_consume(&env_block, e);
1408
1409 if (arg_watchdog_device &&
1410 asprintf(&e, "WATCHDOG_DEVICE=%s", arg_watchdog_device) > 0)
1411 (void) strv_consume(&env_block, e);
4a36297c
LP		 1412 } else
1413 watchdog_close(true);
1414
1415 /* Avoid the creation of new processes forked by the
1416 * kernel; at this point, we will not listen to the
1417 * signals anyway */
1418 if (detect_container() <= 0)
1419 (void) cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1420
1421 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1422 return -errno;
1423}
1424
e839bafd
LP		 1425static void initialize_clock(void) {
1426 int r;
1427
1428 if (clock_is_localtime(NULL) > 0) {
1429 int min;
1430
1431 /*
1432 * The very first call of settimeofday() also does a time warp in the kernel.
1433 *
1434 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on external tools to take care
1435 * of maintaining the RTC and do all adjustments. This matches the behavior of Windows, which leaves
1436 * the RTC alone if the registry tells that the RTC runs in UTC.
1437 */
1438 r = clock_set_timezone(&min);
1439 if (r < 0)
1440 log_error_errno(r, "Failed to apply local time delta, ignoring: %m");
1441 else
1442 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1443
1444 } else if (!in_initrd()) {
1445 /*
1446 * Do a dummy very first call to seal the kernel's time warp magic.
1447 *
1448 * Do not call this from inside the initrd. The initrd might not carry /etc/adjtime with LOCAL, but the
1449 * real system could be set up that way. In such case, we need to delay the time-warp or the sealing
1450 * until we reach the real system.
1451 *
1452 * Do no set the kernel's timezone. The concept of local time cannot be supported reliably, the time
1453 * will jump or be incorrect at every daylight saving time change. All kernel local time concepts will
1454 * be treated as UTC that way.
1455 */
1456 (void) clock_reset_timewarp();
1457 }
1458
1459 r = clock_apply_epoch();
1460 if (r < 0)
1461 log_error_errno(r, "Current system time is before build time, but cannot correct: %m");
1462 else if (r > 0)
1463 log_info("System time before build time, advancing clock.");
1464}
1465
1e41242e 1466static void initialize_coredump(bool skip_setup) {
752bcb77 1467#if ENABLE_COREDUMP
1e41242e
LP		 1468 if (getpid_cached() != 1)
1469 return;
1470
1471 /* Don't limit the core dump size, so that coredump handlers such as systemd-coredump (which honour the limit)
1472 * will process core dumps for system services by default. */
1473 if (setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY)) < 0)
1474 log_warning_errno(errno, "Failed to set RLIMIT_CORE: %m");
1475
1476 /* But at the same time, turn off the core_pattern logic by default, so that no coredumps are stored
1477 * until the systemd-coredump tool is enabled via sysctl. */
1478 if (!skip_setup)
e557b1a6 1479 disable_coredumps();
752bcb77 1480#endif
1e41242e
LP		 1481}
1482
3c7878f9
LP		 1483static void do_reexecute(
1484 int argc,
1485 char *argv[],
1486 const struct rlimit *saved_rlimit_nofile,
1487 const struct rlimit *saved_rlimit_memlock,
1488 FDSet *fds,
1489 const char *switch_root_dir,
1490 const char *switch_root_init,
1491 const char **ret_error_message) {
1492
1493 unsigned i, j, args_size;
1494 const char **args;
1495 int r;
1496
1497 assert(saved_rlimit_nofile);
1498 assert(saved_rlimit_memlock);
1499 assert(ret_error_message);
1500
1501 /* Close and disarm the watchdog, so that the new instance can reinitialize it, but doesn't get rebooted while
1502 * we do that */
1503 watchdog_close(true);
1504
1505 /* Reset the RLIMIT_NOFILE to the kernel default, so that the new systemd can pass the kernel default to its
1506 * child processes */
1507
1508 if (saved_rlimit_nofile->rlim_cur > 0)
1509 (void) setrlimit(RLIMIT_NOFILE, saved_rlimit_nofile);
1510 if (saved_rlimit_memlock->rlim_cur != (rlim_t) -1)
1511 (void) setrlimit(RLIMIT_MEMLOCK, saved_rlimit_memlock);
1512
1513 if (switch_root_dir) {
1514 /* Kill all remaining processes from the initrd, but don't wait for them, so that we can handle the
1515 * SIGCHLD for them after deserializing. */
e73c54b8 1516 broadcast_signal(SIGTERM, false, true, arg_default_timeout_stop_usec);
3c7878f9
LP		 1517
1518 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1519 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1520 if (r < 0)
1521 log_error_errno(r, "Failed to switch root, trying to continue: %m");
1522 }
1523
1524 args_size = MAX(6, argc+1);
1525 args = newa(const char*, args_size);
1526
1527 if (!switch_root_init) {
1528 char sfd[DECIMAL_STR_MAX(int) + 1];
1529
1530 /* First try to spawn ourselves with the right path, and with full serialization. We do this only if
1531 * the user didn't specify an explicit init to spawn. */
1532
1533 assert(arg_serialization);
1534 assert(fds);
1535
1536 xsprintf(sfd, "%i", fileno(arg_serialization));
1537
1538 i = 0;
1539 args[i++] = SYSTEMD_BINARY_PATH;
1540 if (switch_root_dir)
1541 args[i++] = "--switched-root";
1542 args[i++] = arg_system ? "--system" : "--user";
1543 args[i++] = "--deserialize";
1544 args[i++] = sfd;
1545 args[i++] = NULL;
1546
1547 assert(i <= args_size);
1548
1549 /*
1550 * We want valgrind to print its memory usage summary before reexecution. Valgrind won't do this is on
1551 * its own on exec(), but it will do it on exit(). Hence, to ensure we get a summary here, fork() off
1552 * a child, let it exit() cleanly, so that it prints the summary, and wait() for it in the parent,
1553 * before proceeding into the exec().
1554 */
1555 valgrind_summary_hack();
1556
1557 (void) execv(args[0], (char* const*) args);
1558 log_debug_errno(errno, "Failed to execute our own binary, trying fallback: %m");
1559 }
1560
1561 /* Try the fallback, if there is any, without any serialization. We pass the original argv[] and envp[]. (Well,
1562 * modulo the ordering changes due to getopt() in argv[], and some cleanups in envp[], but let's hope that
1563 * doesn't matter.) */
1564
1565 arg_serialization = safe_fclose(arg_serialization);
1566 fds = fdset_free(fds);
1567
1568 /* Reopen the console */
1569 (void) make_console_stdio();
1570
1571 for (j = 1, i = 1; j < (unsigned) argc; j++)
1572 args[i++] = argv[j];
1573 args[i++] = NULL;
1574 assert(i <= args_size);
1575
1576 /* Reenable any blocked signals, especially important if we switch from initial ramdisk to init=... */
1577 (void) reset_all_signal_handlers();
1578 (void) reset_signal_mask();
1579
1580 if (switch_root_init) {
1581 args[0] = switch_root_init;
1582 (void) execv(args[0], (char* const*) args);
1583 log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");
1584 }
1585
1586 args[0] = "/sbin/init";
1587 (void) execv(args[0], (char* const*) args);
1588 r = -errno;
1589
1590 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
1591 ANSI_HIGHLIGHT_RED " !! " ANSI_NORMAL,
1592 "Failed to execute /sbin/init");
1593
1594 if (r == -ENOENT) {
1595 log_warning("No /sbin/init, trying fallback");
1596
1597 args[0] = "/bin/sh";
1598 args[1] = NULL;
1599 (void) execv(args[0], (char* const*) args);
1600 log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m");
1601 } else
1602 log_warning_errno(r, "Failed to execute /sbin/init, giving up: %m");
1603
1604 *ret_error_message = "Failed to execute fallback shell";
1605}
1606
7eb35049
LP		 1607static int invoke_main_loop(
1608 Manager *m,
1609 bool *ret_reexecute,
1610 int *ret_retval, /* Return parameters relevant for shutting down */
1611 const char **ret_shutdown_verb, /* … */
1612 FDSet **ret_fds, /* Return parameters for reexecuting */
1613 char **ret_switch_root_dir, /* … */
1614 char **ret_switch_root_init, /* … */
1615 const char **ret_error_message) {
1616
1617 int r;
1618
1619 assert(m);
1620 assert(ret_reexecute);
1621 assert(ret_retval);
1622 assert(ret_shutdown_verb);
1623 assert(ret_fds);
1624 assert(ret_switch_root_dir);
1625 assert(ret_switch_root_init);
1626 assert(ret_error_message);
1627
1628 for (;;) {
1629 r = manager_loop(m);
1630 if (r < 0) {
1631 *ret_error_message = "Failed to run main loop";
1632 return log_emergency_errno(r, "Failed to run main loop: %m");
1633 }
1634
1635 switch (m->exit_code) {
1636
a6ecbf83 1637 case MANAGER_RELOAD: {
bda7d78b 1638 LogTarget saved_log_target;
a6ecbf83
FB		 1639 int saved_log_level;
1640
7eb35049
LP		 1641 log_info("Reloading.");
1642
3fe91079 1643 /* First, save any overridden log level/target, then parse the configuration file, which might
bda7d78b
FB		 1644 * change the log level to new settings. */
1645
a6ecbf83 1646 saved_log_level = m->log_level_overridden ? log_get_max_level() : -1;
bda7d78b 1647 saved_log_target = m->log_target_overridden ? log_get_target() : _LOG_TARGET_INVALID;
a6ecbf83 1648
7eb35049
LP		 1649 r = parse_config_file();
1650 if (r < 0)
1651 log_warning_errno(r, "Failed to parse config file, ignoring: %m");
1652
1653 set_manager_defaults(m);
1654
a6ecbf83
FB		 1655 if (saved_log_level >= 0)
1656 manager_override_log_level(m, saved_log_level);
bda7d78b
FB		 1657 if (saved_log_target >= 0)
1658 manager_override_log_target(m, saved_log_target);
a6ecbf83 1659
7eb35049
LP		 1660 r = manager_reload(m);
1661 if (r < 0)
1662 log_warning_errno(r, "Failed to reload, ignoring: %m");
1663
1664 break;
a6ecbf83 1665 }
7eb35049
LP		 1666
1667 case MANAGER_REEXECUTE:
1668
1669 r = prepare_reexecute(m, &arg_serialization, ret_fds, false);
1670 if (r < 0) {
1671 *ret_error_message = "Failed to prepare for reexecution";
1672 return r;
1673 }
1674
1675 log_notice("Reexecuting.");
1676
1677 *ret_reexecute = true;
1678 *ret_retval = EXIT_SUCCESS;
1679 *ret_shutdown_verb = NULL;
1680 *ret_switch_root_dir = *ret_switch_root_init = NULL;
1681
1682 return 0;
1683
1684 case MANAGER_SWITCH_ROOT:
1685 if (!m->switch_root_init) {
1686 r = prepare_reexecute(m, &arg_serialization, ret_fds, true);
1687 if (r < 0) {
1688 *ret_error_message = "Failed to prepare for reexecution";
1689 return r;
1690 }
1691 } else
1692 *ret_fds = NULL;
1693
1694 log_notice("Switching root.");
1695
1696 *ret_reexecute = true;
1697 *ret_retval = EXIT_SUCCESS;
1698 *ret_shutdown_verb = NULL;
1699
1700 /* Steal the switch root parameters */
1701 *ret_switch_root_dir = m->switch_root;
1702 *ret_switch_root_init = m->switch_root_init;
1703 m->switch_root = m->switch_root_init = NULL;
1704
1705 return 0;
1706
1707 case MANAGER_EXIT:
1708
1709 if (MANAGER_IS_USER(m)) {
1710 log_debug("Exit.");
1711
1712 *ret_reexecute = false;
1713 *ret_retval = m->return_value;
1714 *ret_shutdown_verb = NULL;
1715 *ret_fds = NULL;
1716 *ret_switch_root_dir = *ret_switch_root_init = NULL;
1717
1718 return 0;
1719 }
1720
1721 _fallthrough_;
1722 case MANAGER_REBOOT:
1723 case MANAGER_POWEROFF:
1724 case MANAGER_HALT:
1725 case MANAGER_KEXEC: {
1726 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1727 [MANAGER_EXIT] = "exit",
1728 [MANAGER_REBOOT] = "reboot",
1729 [MANAGER_POWEROFF] = "poweroff",
1730 [MANAGER_HALT] = "halt",
1731 [MANAGER_KEXEC] = "kexec"
1732 };
1733
1734 log_notice("Shutting down.");
1735
1736 *ret_reexecute = false;
1737 *ret_retval = m->return_value;
1738 assert_se(*ret_shutdown_verb = table[m->exit_code]);
1739 *ret_fds = NULL;
1740 *ret_switch_root_dir = *ret_switch_root_init = NULL;
1741
1742 return 0;
1743 }
1744
1745 default:
1746 assert_not_reached("Unknown exit code.");
1747 }
1748 }
1749}
1750
31aef7ff
LP		 1751static void log_execution_mode(bool *ret_first_boot) {
1752 assert(ret_first_boot);
1753
1754 if (arg_system) {
1755 int v;
1756
1757 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1758 arg_action == ACTION_TEST ? "test " : "" );
1759
1760 v = detect_virtualization();
1761 if (v > 0)
1762 log_info("Detected virtualization %s.", virtualization_to_string(v));
1763
1764 log_info("Detected architecture %s.", architecture_to_string(uname_architecture()));
1765
1766 if (in_initrd()) {
1767 *ret_first_boot = false;
1768 log_info("Running in initial RAM disk.");
1769 } else {
1770 /* Let's check whether we are in first boot, i.e. whether /etc is still unpopulated. We use
1771 * /etc/machine-id as flag file, for this: if it exists we assume /etc is populated, if it
1772 * doesn't it's unpopulated. This allows container managers and installers to provision a
1773 * couple of files already. If the container manager wants to provision the machine ID itself
1774 * it should pass $container_uuid to PID 1. */
1775
1776 *ret_first_boot = access("/etc/machine-id", F_OK) < 0;
1777 if (*ret_first_boot)
1778 log_info("Running with unpopulated /etc.");
1779 }
1780 } else {
b9e90f3a
LP		 1781 if (DEBUG_LOGGING) {
1782 _cleanup_free_ char *t;
31aef7ff 1783
b9e90f3a
LP		 1784 t = uid_to_name(getuid());
1785 log_debug(PACKAGE_STRING " running in %suser mode for user " UID_FMT "/%s. (" SYSTEMD_FEATURES ")",
1786 arg_action == ACTION_TEST ? " test" : "", getuid(), strna(t));
1787 }
31aef7ff
LP		 1788
1789 *ret_first_boot = false;
1790 }
1791}
1792
5afbaa36
LP		 1793static int initialize_runtime(
1794 bool skip_setup,
1795 struct rlimit *saved_rlimit_nofile,
1796 struct rlimit *saved_rlimit_memlock,
1797 const char **ret_error_message) {
1798
1799 int r;
1800
1801 assert(ret_error_message);
1802
1803 /* Sets up various runtime parameters. Many of these initializations are conditionalized:
1804 *
1805 * - Some only apply to --system instances
1806 * - Some only apply to --user instances
1807 * - Some only apply when we first start up, but not when we reexecute
1808 */
1809
2d776038
LP		 1810 if (arg_action != ACTION_RUN)
1811 return 0;
1812
3c3c6cb9
LP		 1813 if (arg_system) {
1814 /* Make sure we leave a core dump without panicing the kernel. */
1815 install_crash_handler();
5afbaa36 1816
3c3c6cb9
LP		 1817 if (!skip_setup) {
1818 r = mount_cgroup_controllers(arg_join_controllers);
1819 if (r < 0) {
1820 *ret_error_message = "Failed to mount cgroup hierarchies";
1821 return r;
1822 }
1823
1824 status_welcome();
1825 hostname_setup();
1826 machine_id_setup(NULL, arg_machine_id, NULL);
1827 loopback_setup();
1828 bump_unix_max_dgram_qlen();
1829 test_usr();
1830 write_container_id();
1831 }
8a2c1fbf 1832
3c3c6cb9
LP		 1833 if (arg_watchdog_device) {
1834 r = watchdog_set_device(arg_watchdog_device);
1835 if (r < 0)
1836 log_warning_errno(r, "Failed to set watchdog device to %s, ignoring: %m", arg_watchdog_device);
1837 }
1838
1839 if (arg_runtime_watchdog > 0 && arg_runtime_watchdog != USEC_INFINITY)
1840 watchdog_set_timeout(&arg_runtime_watchdog);
1841 }
5afbaa36
LP		 1842
1843 if (arg_timer_slack_nsec != NSEC_INFINITY)
1844 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
3a671cd1 1845 log_warning_errno(errno, "Failed to adjust timer slack, ignoring: %m");
5afbaa36
LP		 1846
1847 if (arg_system && !cap_test_all(arg_capability_bounding_set)) {
1848 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set);
1849 if (r < 0) {
1850 *ret_error_message = "Failed to drop capability bounding set of usermode helpers";
1851 return log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m");
1852 }
1853
1854 r = capability_bounding_set_drop(arg_capability_bounding_set, true);
1855 if (r < 0) {
1856 *ret_error_message = "Failed to drop capability bounding set";
1857 return log_emergency_errno(r, "Failed to drop capability bounding set: %m");
1858 }
1859 }
1860
39362f6f
JB		 1861 if (arg_system && arg_no_new_privs) {
1862 if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) {
1863 *ret_error_message = "Failed to disable new privileges";
1864 return log_emergency_errno(errno, "Failed to disable new privileges: %m");
1865 }
1866 }
1867
5afbaa36
LP		 1868 if (arg_syscall_archs) {
1869 r = enforce_syscall_archs(arg_syscall_archs);
1870 if (r < 0) {
1871 *ret_error_message = "Failed to set syscall architectures";
1872 return r;
1873 }
1874 }
1875
1876 if (!arg_system)
1877 /* Become reaper of our children */
1878 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0)
1879 log_warning_errno(errno, "Failed to make us a subreaper: %m");
1880
1881 if (arg_system) {
1882 /* Bump up RLIMIT_NOFILE for systemd itself */
1883 (void) bump_rlimit_nofile(saved_rlimit_nofile);
1884 (void) bump_rlimit_memlock(saved_rlimit_memlock);
1885 }
1886
1887 return 0;
1888}
1889
6acca5fc
LP		 1890static int do_queue_default_job(
1891 Manager *m,
1892 const char **ret_error_message) {
1893
1894 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1895 Job *default_unit_job;
1896 Unit *target = NULL;
1897 int r;
1898
1899 log_debug("Activating default unit: %s", arg_default_unit);
1900
4109ede7
ZJS		 1901 r = manager_load_startable_unit_or_warn(m, arg_default_unit, NULL, &target);
1902 if (r < 0) {
1903 log_info("Falling back to rescue target: " SPECIAL_RESCUE_TARGET);
6acca5fc 1904
4109ede7 1905 r = manager_load_startable_unit_or_warn(m, SPECIAL_RESCUE_TARGET, NULL, &target);
6acca5fc 1906 if (r < 0) {
4109ede7
ZJS		 1907 *ret_error_message = r == -ERFKILL ? "Rescue target masked"
1908 : "Failed to load rescue target";
1909 return r;
6acca5fc
LP		 1910 }
1911 }
1912
1913 assert(target->load_state == UNIT_LOADED);
1914
1915 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, &error, &default_unit_job);
1916 if (r == -EPERM) {
1917 log_debug_errno(r, "Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1918
1919 sd_bus_error_free(&error);
1920
1921 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, &error, &default_unit_job);
1922 if (r < 0) {
1923 *ret_error_message = "Failed to start default target";
1924 return log_emergency_errno(r, "Failed to start default target: %s", bus_error_message(&error, r));
1925 }
1926
1927 } else if (r < 0) {
1928 *ret_error_message = "Failed to isolate default target";
1929 return log_emergency_errno(r, "Failed to isolate default target: %s", bus_error_message(&error, r));
1930 }
1931
1932 m->default_unit_job_id = default_unit_job->id;
1933
1934 return 0;
1935}
1936
970777b5 1937static void free_arguments(void) {
970777b5
LP		 1938
1939 /* Frees all arg_* variables, with the exception of arg_serialization */
ef59409f 1940 rlimit_free_all(arg_default_rlimit);
970777b5
LP		 1941
1942 arg_default_unit = mfree(arg_default_unit);
1943 arg_confirm_spawn = mfree(arg_confirm_spawn);
1944 arg_join_controllers = strv_free_free(arg_join_controllers);
1945 arg_default_environment = strv_free(arg_default_environment);
1946 arg_syscall_archs = set_free(arg_syscall_archs);
1947}
1948
97d1fb94
LP		 1949static int load_configuration(int argc, char **argv, const char **ret_error_message) {
1950 int r;
1951
1952 assert(ret_error_message);
1953
1954 arg_default_tasks_max = system_tasks_max_scale(DEFAULT_TASKS_MAX_PERCENTAGE, 100U);
1955
1956 r = parse_config_file();
1957 if (r < 0) {
1958 *ret_error_message = "Failed to parse config file";
1959 return r;
1960 }
1961
1962 if (arg_system) {
1963 r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, 0);
1964 if (r < 0)
1965 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
1966 }
1967
1968 /* Note that this also parses bits from the kernel command line, including "debug". */
1969 log_parse_environment();
1970
1971 r = parse_argv(argc, argv);
1972 if (r < 0) {
1973 *ret_error_message = "Failed to parse commandline arguments";
1974 return r;
1975 }
1976
1977 /* Initialize default unit */
1978 if (!arg_default_unit) {
1979 arg_default_unit = strdup(SPECIAL_DEFAULT_TARGET);
1980 if (!arg_default_unit) {
1981 *ret_error_message = "Failed to set default unit";
1982 return log_oom();
1983 }
1984 }
1985
db33214b 1986 /* Initialize the show status setting if it hasn't been set explicitly yet */
7a293242 1987 if (arg_show_status == _SHOW_STATUS_INVALID)
db33214b
LP		 1988 arg_show_status = SHOW_STATUS_YES;
1989
97d1fb94
LP		 1990 return 0;
1991}
1992
b0d7c989
LP		 1993static int safety_checks(void) {
1994
febf46a4
LP		 1995 if (getpid_cached() == 1 &&
1996 arg_action != ACTION_RUN) {
1997 log_error("Unsupported execution mode while PID 1.");
1998 return -EPERM;
1999 }
2000
2001 if (getpid_cached() == 1 &&
2002 !arg_system) {
2003 log_error("Can't run --user mode as PID 1.");
2004 return -EPERM;
2005 }
2006
2007 if (arg_action == ACTION_RUN &&
2008 arg_system &&
2009 getpid_cached() != 1) {
2010 log_error("Can't run system mode unless PID 1.");
2011 return -EPERM;
2012 }
2013
b0d7c989
LP		 2014 if (arg_action == ACTION_TEST &&
2015 geteuid() == 0) {
2016 log_error("Don't run test mode as root.");
2017 return -EPERM;
2018 }
2019
2020 if (!arg_system &&
2021 arg_action == ACTION_RUN &&
2022 sd_booted() <= 0) {
2023 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
2024 return -EOPNOTSUPP;
2025 }
2026
2027 if (!arg_system &&
2028 arg_action == ACTION_RUN &&
2029 !getenv("XDG_RUNTIME_DIR")) {
2030 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
2031 return -EUNATCH;
2032 }
2033
2034 if (arg_system &&
2035 arg_action == ACTION_RUN &&
2036 running_in_chroot() > 0) {
2037 log_error("Cannot be run in a chroot() environment.");
2038 return -EOPNOTSUPP;
2039 }
2040
2041 return 0;
2042}
2043
74da609f
LP		 2044static int initialize_security(
2045 bool *loaded_policy,
2046 dual_timestamp *security_start_timestamp,
2047 dual_timestamp *security_finish_timestamp,
2048 const char **ret_error_message) {
2049
2050 int r;
2051
2052 assert(loaded_policy);
2053 assert(security_start_timestamp);
2054 assert(security_finish_timestamp);
2055 assert(ret_error_message);
2056
2057 dual_timestamp_get(security_start_timestamp);
2058
97149f40 2059 r = mac_selinux_setup(loaded_policy);
74da609f
LP		 2060 if (r < 0) {
2061 *ret_error_message = "Failed to load SELinux policy";
2062 return r;
2063 }
2064
2065 r = mac_smack_setup(loaded_policy);
2066 if (r < 0) {
2067 *ret_error_message = "Failed to load SMACK policy";
2068 return r;
2069 }
2070
2071 r = ima_setup();
2072 if (r < 0) {
2073 *ret_error_message = "Failed to load IMA policy";
2074 return r;
2075 }
2076
2077 dual_timestamp_get(security_finish_timestamp);
2078 return 0;
2079}
2080
263162da
LP		 2081static void test_summary(Manager *m) {
2082 assert(m);
2083
2084 printf("-> By units:\n");
2085 manager_dump_units(m, stdout, "\t");
2086
2087 printf("-> By jobs:\n");
2088 manager_dump_jobs(m, stdout, "\t");
2089}
2090
efeb853f
LP		 2091static int collect_fds(FDSet **ret_fds, const char **ret_error_message) {
2092 int r;
2093
2094 assert(ret_fds);
2095 assert(ret_error_message);
2096
2097 r = fdset_new_fill(ret_fds);
2098 if (r < 0) {
2099 *ret_error_message = "Failed to allocate fd set";
2100 return log_emergency_errno(r, "Failed to allocate fd set: %m");
2101 }
2102
2103 fdset_cloexec(*ret_fds, true);
2104
2105 if (arg_serialization)
2106 assert_se(fdset_remove(*ret_fds, fileno(arg_serialization)) >= 0);
2107
2108 return 0;
2109}
2110
2e51b31c
LP		 2111static void setup_console_terminal(bool skip_setup) {
2112
2113 if (!arg_system)
2114 return;
2115
2116 /* Become a session leader if we aren't one yet. */
2117 (void) setsid();
2118
2119 /* If we are init, we connect stdin/stdout/stderr to /dev/null and make sure we don't have a controlling
2120 * tty. */
2121 (void) release_terminal();
2122
2123 /* Reset the console, but only if this is really init and we are freshly booted */
2124 if (getpid_cached() == 1 && !skip_setup)
2125 (void) console_setup();
2126}
2127
aa40ff07
LP		 2128static bool early_skip_setup_check(int argc, char *argv[]) {
2129 bool found_deserialize = false;
2130 int i;
2131
2132 /* Determine if this is a reexecution or normal bootup. We do the full command line parsing much later, so
2133 * let's just have a quick peek here. Note that if we have switched root, do all the special setup things
2134 * anyway, even if in that case we also do deserialization. */
2135
2136 for (i = 1; i < argc; i++) {
aa40ff07
LP		 2137 if (streq(argv[i], "--switched-root"))
2138 return false; /* If we switched root, don't skip the setup. */
2139 else if (streq(argv[i], "--deserialize"))
2140 found_deserialize = true;
2141 }
2142
2143 return found_deserialize; /* When we are deserializing, then we are reexecuting, hence avoid the extensive setup */
2144}
2145
60918275 2146int main(int argc, char *argv[]) {
625e8690
LP		 2147
2148 dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL, userspace_timestamp = DUAL_TIMESTAMP_NULL, kernel_timestamp = DUAL_TIMESTAMP_NULL,
2149 security_start_timestamp = DUAL_TIMESTAMP_NULL, security_finish_timestamp = DUAL_TIMESTAMP_NULL;
2150 struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0), saved_rlimit_memlock = RLIMIT_MAKE_CONST((rlim_t) -1);
2151 bool skip_setup, loaded_policy = false, queue_default_job = false, first_boot = false, reexecute = false;
2152 char *switch_root_dir = NULL, *switch_root_init = NULL;
9d76d730 2153 usec_t before_startup, after_startup;
625e8690 2154 static char systemd[] = "systemd";
9d76d730 2155 char timespan[FORMAT_TIMESPAN_MAX];
625e8690
LP		 2156 const char *shutdown_verb = NULL, *error_message = NULL;
2157 int r, retval = EXIT_FAILURE;
2158 Manager *m = NULL;
a16e1123 2159 FDSet *fds = NULL;
27b14a22 2160
d72a8f10 2161 /* SysV compatibility: redirect init → telinit */
6808a0bc 2162 redirect_telinit(argc, argv);
2cb1a60d 2163
d72a8f10 2164 /* Take timestamps early on */
c3a170f3
HH		 2165 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
2166 dual_timestamp_get(&userspace_timestamp);
2167
d72a8f10
LP		 2168 /* Figure out whether we need to do initialize the system, or if we already did that because we are
2169 * reexecuting */
aa40ff07 2170 skip_setup = early_skip_setup_check(argc, argv);
d03bc1b8 2171
d72a8f10
LP		 2172 /* If we get started via the /sbin/init symlink then we are called 'init'. After a subsequent reexecution we
2173 * are then called 'systemd'. That is confusing, hence let's call us systemd right-away. */
f3b6a3ed 2174 program_invocation_short_name = systemd;
eee8b7ab 2175 (void) prctl(PR_SET_NAME, systemd);
5d6b1584 2176
d72a8f10 2177 /* Save the original command line */
9a0e6896
LP		 2178 saved_argv = argv;
2179 saved_argc = argc;
f3b6a3ed 2180
6fdb8de4 2181 /* Make sure that if the user says "syslog" we actually log to the journal. */
c1dc6153 2182 log_set_upgrade_syslog_to_journal(true);
bbe63281 2183
df0ff127 2184 if (getpid_cached() == 1) {
b5752d23
LP		 2185 /* When we run as PID 1 force system mode */
2186 arg_system = true;
2187
48a601fe 2188 /* Disable the umask logic */
90dc8c2e
MG		 2189 umask(0);
2190
92890452
LP		 2191 /* Make sure that at least initially we do not ever log to journald/syslogd, because it might not be
2192 * activated yet (even though the log socket for it exists). */
d075092f
LP		 2193 log_set_prohibit_ipc(true);
2194
48a601fe
LP		 2195 /* Always reopen /dev/console when running as PID 1 or one of its pre-execve() children. This is
2196 * important so that we never end up logging to any foreign stderr, for example if we have to log in a
2197 * child process right before execve()'ing the actual binary, at a point in time where socket
2198 * activation stderr/stdout area already set up. */
2199 log_set_always_reopen_console(true);
48a601fe 2200
92890452 2201 if (detect_container() <= 0) {
4f8d551f 2202
92890452 2203 /* Running outside of a container as PID 1 */
92890452
LP		 2204 log_set_target(LOG_TARGET_KMSG);
2205 log_open();
a866073d 2206
92890452
LP		 2207 if (in_initrd())
2208 initrd_timestamp = userspace_timestamp;
c3ba6250 2209
92890452
LP		 2210 if (!skip_setup) {
2211 r = mount_setup_early();
2212 if (r < 0) {
2213 error_message = "Failed to mount early API filesystems";
2214 goto finish;
2215 }
2216
2217 r = initialize_security(
2218 &loaded_policy,
2219 &security_start_timestamp,
2220 &security_finish_timestamp,
2221 &error_message);
2222 if (r < 0)
2223 goto finish;
d723cd65 2224 }
eee8b7ab 2225
92890452
LP		 2226 if (mac_selinux_init() < 0) {
2227 error_message = "Failed to initialize SELinux policy";
96694e99 2228 goto finish;
92890452 2229 }
0b3325e7 2230
92890452
LP		 2231 if (!skip_setup)
2232 initialize_clock();
2233
2234 /* Set the default for later on, but don't actually open the logs like this for now. Note that
2235 * if we are transitioning from the initrd there might still be journal fd open, and we
2236 * shouldn't attempt opening that before we parsed /proc/cmdline which might redirect output
2237 * elsewhere. */
2238 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
2239
2240 } else {
2241 /* Running inside a container, as PID 1 */
92890452
LP		 2242 log_set_target(LOG_TARGET_CONSOLE);
2243 log_open();
2244
2245 /* For later on, see above... */
2246 log_set_target(LOG_TARGET_JOURNAL);
2247
2248 /* clear the kernel timestamp,
2249 * because we are in a container */
2250 kernel_timestamp = DUAL_TIMESTAMP_NULL;
cb6531be 2251 }
7948c4df 2252
92890452 2253 initialize_coredump(skip_setup);
a866073d 2254
92890452
LP		 2255 r = fixup_environment();
2256 if (r < 0) {
2257 log_emergency_errno(r, "Failed to fix up PID 1 environment: %m");
2258 error_message = "Failed to fix up PID1 environment";
2259 goto finish;
2260 }
a866073d 2261
c3a170f3 2262 } else {
a866073d 2263 /* Running as user instance */
463d0d15 2264 arg_system = false;
eeecf6e6 2265 log_set_target(LOG_TARGET_AUTO);
871e5809 2266 log_open();
c3a170f3
HH		 2267
2268 /* clear the kernel timestamp,
2269 * because we are not PID 1 */
6513d561 2270 kernel_timestamp = DUAL_TIMESTAMP_NULL;
bbe63281 2271 }
a5dab5ce 2272
6edefe0b 2273 if (arg_system) {
92890452
LP		 2274 /* Try to figure out if we can use colors with the console. No need to do that for user instances since
2275 * they never log into the console. */
3a18b604 2276 log_show_color(colors_enabled());
92890452 2277
c76cf844
AK		 2278 r = make_null_stdio();
2279 if (r < 0)
92890452 2280 log_warning_errno(r, "Failed to redirect standard streams to /dev/null, ignoring: %m");
3a18b604
FB		 2281 }
2282
f170852a
LP		 2283 /* Mount /proc, /sys and friends, so that /proc/cmdline and
2284 * /proc/$PID/fd is available. */
df0ff127 2285 if (getpid_cached() == 1) {
f84f9974 2286
a132bef0 2287 /* Load the kernel modules early. */
2e75e2a8
DM		 2288 if (!skip_setup)
2289 kmod_setup();
2e75e2a8 2290
0c85a4f3 2291 r = mount_setup(loaded_policy);
cb6531be
ZJS		 2292 if (r < 0) {
2293 error_message = "Failed to mount API filesystems";
8efe3c01 2294 goto finish;
cb6531be 2295 }
0c85a4f3 2296 }
4ade7963
LP		 2297
2298 /* Reset all signal handlers. */
ce30c8dc
LP		 2299 (void) reset_all_signal_handlers();
2300 (void) ignore_signals(SIGNALS_IGNORE, -1);
078e4539 2301
97d1fb94
LP		 2302 r = load_configuration(argc, argv, &error_message);
2303 if (r < 0)
f170852a 2304 goto finish;
10c961b9 2305
b0d7c989
LP		 2306 r = safety_checks();
2307 if (r < 0)
fe783b03 2308 goto finish;
fe783b03 2309
bbc1acab 2310 if (IN_SET(arg_action, ACTION_TEST, ACTION_HELP, ACTION_DUMP_CONFIGURATION_ITEMS, ACTION_DUMP_BUS_PROPERTIES))
ee5324aa 2311 (void) pager_open(arg_no_pager, false);
b0d7c989
LP		 2312
2313 if (arg_action != ACTION_RUN)
74e7579c 2314 skip_setup = true;
b87c2aa6 2315
fa0f4d8a 2316 if (arg_action == ACTION_HELP) {
f170852a
LP		 2317 retval = help();
2318 goto finish;
9ba0bc4e
ZJS		 2319 } else if (arg_action == ACTION_VERSION) {
2320 retval = version();
2321 goto finish;
fa0f4d8a 2322 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
e537352b 2323 unit_dump_config_items(stdout);
22f4096c 2324 retval = EXIT_SUCCESS;
e537352b 2325 goto finish;
bbc1acab
YW		 2326 } else if (arg_action == ACTION_DUMP_BUS_PROPERTIES) {
2327 dump_bus_properties(stdout);
2328 retval = EXIT_SUCCESS;
2329 goto finish;
f170852a
LP		 2330 }
2331
4c701096 2332 assert_se(IN_SET(arg_action, ACTION_RUN, ACTION_TEST));
f170852a 2333
5a2e0c62
LP		 2334 /* Move out of the way, so that we won't block unmounts */
2335 assert_se(chdir("/") == 0);
2336
dea374e8 2337 if (arg_action == ACTION_RUN) {
a70c72a0 2338
efeb853f 2339 /* Close logging fds, in order not to confuse collecting passed fds and terminal logic below */
a70c72a0
LP		 2340 log_close();
2341
2342 /* Remember open file descriptors for later deserialization */
efeb853f
LP		 2343 r = collect_fds(&fds, &error_message);
2344 if (r < 0)
dea374e8 2345 goto finish;
a16e1123 2346
2e51b31c
LP		 2347 /* Give up any control of the console, but make sure its initialized. */
2348 setup_console_terminal(skip_setup);
56d96fc0 2349
a70c72a0
LP		 2350 /* Open the logging devices, if possible and necessary */
2351 log_open();
56d96fc0 2352 }
4ade7963 2353
31aef7ff 2354 log_execution_mode(&first_boot);
a5dab5ce 2355
2d776038
LP		 2356 r = initialize_runtime(skip_setup,
2357 &saved_rlimit_nofile,
2358 &saved_rlimit_memlock,
2359 &error_message);
2360 if (r < 0)
2361 goto finish;
4096d6f5 2362
e0a3da1f
ZJS		 2363 r = manager_new(arg_system ? UNIT_FILE_SYSTEM : UNIT_FILE_USER,
2364 arg_action == ACTION_TEST ? MANAGER_TEST_FULL : 0,
2365 &m);
e96d6be7 2366 if (r < 0) {
da927ba9 2367 log_emergency_errno(r, "Failed to allocate manager object: %m");
cb6531be 2368 error_message = "Failed to allocate manager object";
60918275
LP		 2369 goto finish;
2370 }
2371
9f9f0342
LP		 2372 m->timestamps[MANAGER_TIMESTAMP_KERNEL] = kernel_timestamp;
2373 m->timestamps[MANAGER_TIMESTAMP_INITRD] = initrd_timestamp;
2374 m->timestamps[MANAGER_TIMESTAMP_USERSPACE] = userspace_timestamp;
d4ee7bd8
YW		 2375 m->timestamps[manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_SECURITY_START)] = security_start_timestamp;
2376 m->timestamps[manager_timestamp_initrd_mangle(MANAGER_TIMESTAMP_SECURITY_FINISH)] = security_finish_timestamp;
9e58ff9c 2377
85cb4151 2378 set_manager_defaults(m);
7b46fc6a 2379 set_manager_settings(m);
fd130612 2380 manager_set_first_boot(m, first_boot);
27d340c7 2381
bf4df7c3 2382 /* Remember whether we should queue the default job */
d3b1c508 2383 queue_default_job = !arg_serialization || arg_switched_root;
bf4df7c3 2384
9d76d730
LP		 2385 before_startup = now(CLOCK_MONOTONIC);
2386
d3b1c508 2387 r = manager_startup(m, arg_serialization, fds);
58f88d92 2388 if (r < 0) {
da927ba9 2389 log_error_errno(r, "Failed to fully start up daemon: %m");
cefb3eda 2390 error_message = "Failed to start up manager";
58f88d92
ZJS		 2391 goto finish;
2392 }
a16e1123 2393
6acca5fc 2394 /* This will close all file descriptors that were opened, but not claimed by any unit. */
2feceb5e 2395 fds = fdset_free(fds);
74ca738f 2396 arg_serialization = safe_fclose(arg_serialization);
bf4df7c3
LP		 2397
2398 if (queue_default_job) {
6acca5fc 2399 r = do_queue_default_job(m, &error_message);
718db961 2400 if (r < 0)
37d88da7 2401 goto finish;
6acca5fc 2402 }
ab17a050 2403
6acca5fc 2404 after_startup = now(CLOCK_MONOTONIC);
60918275 2405
6acca5fc
LP		 2406 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
2407 "Loaded units and determined initial transaction in %s.",
2408 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
07672f49 2409
6acca5fc 2410 if (arg_action == ACTION_TEST) {
263162da 2411 test_summary(m);
6acca5fc
LP		 2412 retval = EXIT_SUCCESS;
2413 goto finish;
e965d56d 2414 }
d46de8a1 2415
3046b6db
LP		 2416 (void) invoke_main_loop(m,
2417 &reexecute,
2418 &retval,
2419 &shutdown_verb,
2420 &fds,
2421 &switch_root_dir,
2422 &switch_root_init,
2423 &error_message);
f170852a 2424
60918275 2425finish:
b87c2aa6
ZJS		 2426 pager_close();
2427
92890452 2428 if (m) {
81f5fc2d 2429 arg_shutdown_watchdog = m->shutdown_watchdog;
92890452
LP		 2430 m = manager_free(m);
2431 }
60918275 2432
970777b5 2433 free_arguments();
cc56fafe 2434 mac_selinux_finish();
b2bb3dbe 2435
3c7878f9
LP		 2436 if (reexecute)
2437 do_reexecute(argc, argv,
2438 &saved_rlimit_nofile,
2439 &saved_rlimit_memlock,
2440 fds,
2441 switch_root_dir,
2442 switch_root_init,
2443 &error_message); /* This only returns if reexecution failed */
a16e1123 2444
74ca738f 2445 arg_serialization = safe_fclose(arg_serialization);
2feceb5e 2446 fds = fdset_free(fds);
a16e1123 2447
349cc4a5 2448#if HAVE_VALGRIND_VALGRIND_H
54b434b1
LP		 2449 /* If we are PID 1 and running under valgrind, then let's exit
2450 * here explicitly. valgrind will only generate nice output on
2451 * exit(), not on exec(), hence let's do the former not the
2452 * latter here. */
8a2c1fbf
EJ		 2453 if (getpid_cached() == 1 && RUNNING_ON_VALGRIND) {
2454 /* Cleanup watchdog_device strings for valgrind. We need them
2455 * in become_shutdown() so normally we cannot free them yet. */
2456 watchdog_free_device();
2457 arg_watchdog_device = mfree(arg_watchdog_device);
27fe58b7 2458 return retval;
8a2c1fbf 2459 }
54b434b1
LP		 2460#endif
2461
b9080b03 2462 if (shutdown_verb) {
7eb35049 2463 r = become_shutdown(shutdown_verb, retval);
4a36297c 2464 log_error_errno(r, "Failed to execute shutdown binary, %s: %m", getpid_cached() == 1 ? "freezing" : "quitting");
9b9881d7 2465 error_message = "Failed to execute shutdown binary";
b9080b03
FF		 2466 }
2467
8a2c1fbf
EJ		 2468 watchdog_free_device();
2469 arg_watchdog_device = mfree(arg_watchdog_device);
2470
df0ff127 2471 if (getpid_cached() == 1) {
cb6531be
ZJS		 2472 if (error_message)
2473 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
1fc464f6 2474 ANSI_HIGHLIGHT_RED "!!!!!!" ANSI_NORMAL,
cb6531be 2475 "%s, freezing.", error_message);
b9e74c39 2476 freeze_or_reboot();
cb6531be 2477 }
c3b3c274 2478
60918275
LP		 2479 return retval;
2480}
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