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shutdown: make use of wait_for_terminate_and_warn()
[thirdparty/systemd.git] / src / 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
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
ea430986
LP		 22#include <dbus/dbus.h>
23
60918275
LP		 24#include <stdio.h>
25#include <errno.h>
26#include <string.h>
16354eff 27#include <unistd.h>
4ade7963
LP		 28#include <sys/types.h>
29#include <sys/stat.h>
f170852a 30#include <getopt.h>
97c4f35c 31#include <signal.h>
4fc935ca 32#include <sys/wait.h>
80876c20 33#include <fcntl.h>
60918275
LP		 34
35#include "manager.h"
16354eff 36#include "log.h"
4ade7963 37#include "mount-setup.h"
302e8c4c 38#include "hostname-setup.h"
af5bc85d 39#include "loopback-setup.h"
11c3a4ee 40#include "kmod-setup.h"
72bca11b 41#include "locale-setup.h"
302e8c4c 42#include "load-fragment.h"
a16e1123 43#include "fdset.h"
514f4ef5 44#include "special.h"
487393e9 45#include "conf-parser.h"
398ef8ba 46#include "bus-errors.h"
ad780f19 47#include "missing.h"
e51bc1a2 48#include "label.h"
302e27c8 49#include "build.h"
60918275 50
f170852a
LP		 51static enum {
52 ACTION_RUN,
e965d56d 53 ACTION_HELP,
e537352b 54 ACTION_TEST,
4288f619
LP		 55 ACTION_DUMP_CONFIGURATION_ITEMS,
56 ACTION_DONE
fa0f4d8a 57} arg_action = ACTION_RUN;
f170852a 58
fa0f4d8a
LP		 59static char *arg_default_unit = NULL;
60static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
61
62static bool arg_dump_core = true;
63static bool arg_crash_shell = false;
64static int arg_crash_chvt = -1;
65static bool arg_confirm_spawn = false;
9e58ff9c 66static bool arg_show_status = true;
07459bb6 67#ifdef HAVE_SYSV_COMPAT
6e98720f 68static bool arg_sysv_console = true;
07459bb6 69#endif
d3689161 70static bool arg_mount_auto = true;
173a8d04 71static bool arg_swap_auto = true;
b2bb3dbe 72static char *arg_console = NULL;
4fc935ca 73
a16e1123 74static FILE* serialization = NULL;
80876c20 75
6f5e3f35
LP		 76static void nop_handler(int sig) {
77}
78
93a46b0b 79_noreturn_ static void crash(int sig) {
97c4f35c 80
fa0f4d8a 81 if (!arg_dump_core)
582a507f 82 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
97c4f35c 83 else {
6f5e3f35 84 struct sigaction sa;
97c4f35c
LP		 85 pid_t pid;
86
6f5e3f35
LP		 87 /* We want to wait for the core process, hence let's enable SIGCHLD */
88 zero(sa);
89 sa.sa_handler = nop_handler;
90 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
91 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
92
97c4f35c 93 if ((pid = fork()) < 0)
582a507f 94 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
97c4f35c
LP		 95
96 else if (pid == 0) {
97c4f35c
LP		 97 struct rlimit rl;
98
99 /* Enable default signal handler for core dump */
100 zero(sa);
101 sa.sa_handler = SIG_DFL;
102 assert_se(sigaction(sig, &sa, NULL) == 0);
103
104 /* Don't limit the core dump size */
105 zero(rl);
106 rl.rlim_cur = RLIM_INFINITY;
107 rl.rlim_max = RLIM_INFINITY;
108 setrlimit(RLIMIT_CORE, &rl);
109
110 /* Just to be sure... */
111 assert_se(chdir("/") == 0);
112
113 /* Raise the signal again */
114 raise(sig);
115
116 assert_not_reached("We shouldn't be here...");
117 _exit(1);
4fc935ca
LP		 118
119 } else {
8e12a6ae
LP		 120 siginfo_t status;
121 int r;
4fc935ca
LP		 122
123 /* Order things nicely. */
8e12a6ae
LP		 124 if ((r = wait_for_terminate(pid, &status)) < 0)
125 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
126 else if (status.si_code != CLD_DUMPED)
582a507f 127 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
4fc935ca 128 else
582a507f 129 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
97c4f35c
LP		 130 }
131 }
132
fa0f4d8a
LP		 133 if (arg_crash_chvt)
134 chvt(arg_crash_chvt);
601f6a1e 135
fa0f4d8a 136 if (arg_crash_shell) {
6f5e3f35
LP		 137 struct sigaction sa;
138 pid_t pid;
8c43883a 139
4fc935ca
LP		 140 log_info("Executing crash shell in 10s...");
141 sleep(10);
142
6f5e3f35
LP		 143 /* Let the kernel reap children for us */
144 zero(sa);
145 sa.sa_handler = SIG_IGN;
146 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
147 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
8c43883a 148
6f5e3f35
LP		 149 if ((pid = fork()) < 0)
150 log_error("Failed to fork off crash shell: %s", strerror(errno));
151 else if (pid == 0) {
843d2643 152 int fd, r;
ea5652c2 153
21de3988 154 if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
ea5652c2 155 log_error("Failed to acquire terminal: %s", strerror(-fd));
5b2a0903 156 else if ((r = make_stdio(fd)) < 0)
843d2643 157 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
ea5652c2 158
6f5e3f35
LP		 159 execl("/bin/sh", "/bin/sh", NULL);
160
161 log_error("execl() failed: %s", strerror(errno));
162 _exit(1);
163 }
c99b188e 164
bb00e604 165 log_info("Successfully spawned crash shall as pid %lu.", (unsigned long) pid);
4fc935ca
LP		 166 }
167
168 log_info("Freezing execution.");
97c4f35c
LP		 169 freeze();
170}
171
172static void install_crash_handler(void) {
173 struct sigaction sa;
174
175 zero(sa);
176
177 sa.sa_handler = crash;
178 sa.sa_flags = SA_NODEFER;
179
1b91d3e8 180 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
97c4f35c 181}
f170852a 182
843d2643
LP		 183static int make_null_stdio(void) {
184 int null_fd, r;
80876c20 185
c8513d54 186 if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) {
80876c20 187 log_error("Failed to open /dev/null: %m");
843d2643 188 return -errno;
80876c20
LP		 189 }
190
843d2643
LP		 191 if ((r = make_stdio(null_fd)) < 0)
192 log_warning("Failed to dup2() device: %s", strerror(-r));
80876c20 193
843d2643
LP		 194 return r;
195}
80876c20 196
843d2643
LP		 197static int console_setup(bool do_reset) {
198 int tty_fd, r;
80876c20 199
843d2643
LP		 200 /* If we are init, we connect stdin/stdout/stderr to /dev/null
201 * and make sure we don't have a controlling tty. */
80876c20 202
843d2643
LP		 203 release_terminal();
204
205 if (!do_reset)
206 return 0;
80876c20 207
843d2643
LP		 208 if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
209 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
210 return -tty_fd;
211 }
80876c20 212
843d2643
LP		 213 if ((r = reset_terminal(tty_fd)) < 0)
214 log_error("Failed to reset /dev/console: %s", strerror(-r));
215
216 close_nointr_nofail(tty_fd);
80876c20
LP		 217 return r;
218}
219
f170852a
LP		 220static int set_default_unit(const char *u) {
221 char *c;
222
223 assert(u);
224
225 if (!(c = strdup(u)))
226 return -ENOMEM;
227
fa0f4d8a
LP		 228 free(arg_default_unit);
229 arg_default_unit = c;
f170852a
LP		 230 return 0;
231}
232
233static int parse_proc_cmdline_word(const char *word) {
234
235 static const char * const rlmap[] = {
ed370f5d
LP		 236 "emergency", SPECIAL_EMERGENCY_TARGET,
237 "single", SPECIAL_RESCUE_TARGET,
238 "-s", SPECIAL_RESCUE_TARGET,
239 "s", SPECIAL_RESCUE_TARGET,
240 "S", SPECIAL_RESCUE_TARGET,
241 "1", SPECIAL_RESCUE_TARGET,
242 "2", SPECIAL_RUNLEVEL2_TARGET,
243 "3", SPECIAL_RUNLEVEL3_TARGET,
244 "4", SPECIAL_RUNLEVEL4_TARGET,
245 "5", SPECIAL_RUNLEVEL5_TARGET,
f170852a
LP		 246 };
247
5192bd19
LP		 248 assert(word);
249
2f198e2f
LP		 250 if (startswith(word, "systemd.unit="))
251 return set_default_unit(word + 13);
f170852a
LP		 252
253 else if (startswith(word, "systemd.log_target=")) {
254
255 if (log_set_target_from_string(word + 19) < 0)
256 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
257
258 } else if (startswith(word, "systemd.log_level=")) {
259
260 if (log_set_max_level_from_string(word + 18) < 0)
261 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
262
bbe63281
LP		 263 } else if (startswith(word, "systemd.log_color=")) {
264
265 if (log_show_color_from_string(word + 18) < 0)
266 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
267
268 } else if (startswith(word, "systemd.log_location=")) {
269
270 if (log_show_location_from_string(word + 21) < 0)
271 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
272
4fc935ca
LP		 273 } else if (startswith(word, "systemd.dump_core=")) {
274 int r;
275
276 if ((r = parse_boolean(word + 18)) < 0)
601f6a1e 277 log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
4fc935ca 278 else
fa0f4d8a 279 arg_dump_core = r;
4fc935ca
LP		 280
281 } else if (startswith(word, "systemd.crash_shell=")) {
282 int r;
283
284 if ((r = parse_boolean(word + 20)) < 0)
601f6a1e 285 log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
4fc935ca 286 else
fa0f4d8a 287 arg_crash_shell = r;
5e7ee61c
LP		 288
289 } else if (startswith(word, "systemd.confirm_spawn=")) {
290 int r;
291
292 if ((r = parse_boolean(word + 22)) < 0)
293 log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
294 else
fa0f4d8a 295 arg_confirm_spawn = r;
5e7ee61c 296
601f6a1e
LP		 297 } else if (startswith(word, "systemd.crash_chvt=")) {
298 int k;
299
300 if (safe_atoi(word + 19, &k) < 0)
301 log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
302 else
fa0f4d8a 303 arg_crash_chvt = k;
601f6a1e 304
9e58ff9c
LP		 305 } else if (startswith(word, "systemd.show_status=")) {
306 int r;
307
308 if ((r = parse_boolean(word + 20)) < 0)
309 log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
6e98720f 310 else
9e58ff9c 311 arg_show_status = r;
07459bb6 312#ifdef HAVE_SYSV_COMPAT
6e98720f
LP		 313 } else if (startswith(word, "systemd.sysv_console=")) {
314 int r;
315
316 if ((r = parse_boolean(word + 21)) < 0)
317 log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
318 else
319 arg_sysv_console = r;
07459bb6 320#endif
9e58ff9c 321
4fc935ca
LP		 322 } else if (startswith(word, "systemd.")) {
323
324 log_warning("Unknown kernel switch %s. Ignoring.", word);
325
bbe63281
LP		 326 log_info("Supported kernel switches:\n"
327 "systemd.unit=UNIT Default unit to start\n"
bbe63281 328 "systemd.dump_core=0|1 Dump core on crash\n"
9e58ff9c 329 "systemd.crash_shell=0|1 Run shell on crash\n"
bbe63281 330 "systemd.crash_chvt=N Change to VT #N on crash\n"
9e58ff9c 331 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
6e98720f 332 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
07459bb6 333#ifdef HAVE_SYSV_COMPAT
6e98720f 334 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
07459bb6 335#endif
6e98720f
LP		 336 "systemd.log_target=console|kmsg|syslog|syslog-org-kmsg|null\n"
337 " Log target\n"
338 "systemd.log_level=LEVEL Log level\n"
339 "systemd.log_color=0|1 Highlight important log messages\n"
340 "systemd.log_location=0|1 Include code location in log messages\n");
4fc935ca 341
b2bb3dbe
LP		 342 } else if (startswith(word, "console=")) {
343 const char *k;
344 size_t l;
345 char *w = NULL;
346
347 k = word + 8;
348 l = strcspn(k, ",");
349
350 /* Ignore the console setting if set to a VT */
351 if (l < 4 ||
352 !startswith(k, "tty") ||
353 k[3+strspn(k+3, "0123456789")] != 0) {
354
355 if (!(w = strndup(k, l)))
356 return -ENOMEM;
357 }
358
359 free(arg_console);
360 arg_console = w;
361
a9c501a5 362 } else if (streq(word, "quiet")) {
6e98720f 363 arg_show_status = false;
07459bb6 364#ifdef HAVE_SYSV_COMPAT
6e98720f 365 arg_sysv_console = false;
07459bb6 366#endif
9e58ff9c 367 } else {
f170852a
LP		 368 unsigned i;
369
370 /* SysV compatibility */
f170852a
LP		 371 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
372 if (streq(word, rlmap[i]))
373 return set_default_unit(rlmap[i+1]);
374 }
375
376 return 0;
377}
378
487393e9
LP		 379static int config_parse_level(
380 const char *filename,
381 unsigned line,
382 const char *section,
383 const char *lvalue,
384 const char *rvalue,
385 void *data,
386 void *userdata) {
387
388 assert(filename);
389 assert(lvalue);
390 assert(rvalue);
391
392 log_set_max_level_from_string(rvalue);
393 return 0;
394}
395
396static int config_parse_target(
397 const char *filename,
398 unsigned line,
399 const char *section,
400 const char *lvalue,
401 const char *rvalue,
402 void *data,
403 void *userdata) {
404
405 assert(filename);
406 assert(lvalue);
407 assert(rvalue);
408
409 log_set_target_from_string(rvalue);
410 return 0;
411}
412
413static int config_parse_color(
414 const char *filename,
415 unsigned line,
416 const char *section,
417 const char *lvalue,
418 const char *rvalue,
419 void *data,
420 void *userdata) {
421
422 assert(filename);
423 assert(lvalue);
424 assert(rvalue);
425
426 log_show_color_from_string(rvalue);
427 return 0;
428}
429
430static int config_parse_location(
431 const char *filename,
432 unsigned line,
433 const char *section,
434 const char *lvalue,
435 const char *rvalue,
436 void *data,
437 void *userdata) {
438
439 assert(filename);
440 assert(lvalue);
441 assert(rvalue);
442
443 log_show_location_from_string(rvalue);
444 return 0;
445}
446
447static int config_parse_cpu_affinity(
448 const char *filename,
449 unsigned line,
450 const char *section,
451 const char *lvalue,
452 const char *rvalue,
453 void *data,
454 void *userdata) {
455
456 char *w;
457 size_t l;
458 char *state;
459 cpu_set_t *c = NULL;
460 unsigned ncpus = 0;
461
462 assert(filename);
463 assert(lvalue);
464 assert(rvalue);
465
f60f22df 466 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
487393e9
LP		 467 char *t;
468 int r;
469 unsigned cpu;
470
471 if (!(t = strndup(w, l)))
472 return -ENOMEM;
473
474 r = safe_atou(t, &cpu);
475 free(t);
476
477 if (!c)
478 if (!(c = cpu_set_malloc(&ncpus)))
479 return -ENOMEM;
480
481 if (r < 0 || cpu >= ncpus) {
482 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
483 CPU_FREE(c);
484 return -EBADMSG;
485 }
486
487 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
488 }
489
490 if (c) {
491 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
492 log_warning("Failed to set CPU affinity: %m");
493
494 CPU_FREE(c);
495 }
496
497 return 0;
498}
499
500static int parse_config_file(void) {
501
502 const ConfigItem items[] = {
d3689161
LP		 503 { "LogLevel", config_parse_level, NULL, "Manager" },
504 { "LogTarget", config_parse_target, NULL, "Manager" },
505 { "LogColor", config_parse_color, NULL, "Manager" },
506 { "LogLocation", config_parse_location, NULL, "Manager" },
507 { "DumpCore", config_parse_bool, &arg_dump_core, "Manager" },
508 { "CrashShell", config_parse_bool, &arg_crash_shell, "Manager" },
509 { "ShowStatus", config_parse_bool, &arg_show_status, "Manager" },
07459bb6 510#ifdef HAVE_SYSV_COMPAT
d3689161 511 { "SysVConsole", config_parse_bool, &arg_sysv_console, "Manager" },
07459bb6 512#endif
d3689161
LP		 513 { "CrashChVT", config_parse_int, &arg_crash_chvt, "Manager" },
514 { "CPUAffinity", config_parse_cpu_affinity, NULL, "Manager" },
d3689161 515 { "MountAuto", config_parse_bool, &arg_mount_auto, "Manager" },
173a8d04 516 { "SwapAuto", config_parse_bool, &arg_swap_auto, "Manager" },
487393e9
LP		 517 { NULL, NULL, NULL, NULL }
518 };
519
520 static const char * const sections[] = {
521 "Manager",
522 NULL
523 };
524
525 FILE *f;
526 const char *fn;
527 int r;
528
529 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : SESSION_CONFIG_FILE;
530
531 if (!(f = fopen(fn, "re"))) {
532 if (errno == ENOENT)
533 return 0;
534
535 log_warning("Failed to open configuration file '%s': %m", fn);
536 return 0;
537 }
538
539 if ((r = config_parse(fn, f, sections, items, false, NULL)) < 0)
540 log_warning("Failed to parse configuration file: %s", strerror(-r));
541
542 fclose(f);
543
544 return 0;
545}
546
f170852a 547static int parse_proc_cmdline(void) {
52661efd 548 char *line, *w, *state;
f170852a 549 int r;
f170852a 550 size_t l;
f170852a
LP		 551
552 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
e364ad06 553 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
f170852a
LP		 554 return 0;
555 }
556
557 FOREACH_WORD_QUOTED(w, l, line, state) {
558 char *word;
559
560 if (!(word = strndup(w, l))) {
561 r = -ENOMEM;
562 goto finish;
563 }
564
565 r = parse_proc_cmdline_word(word);
566 free(word);
567
568 if (r < 0)
569 goto finish;
570 }
571
572 r = 0;
573
574finish:
575 free(line);
576 return r;
577}
578
579static int parse_argv(int argc, char *argv[]) {
580
581 enum {
582 ARG_LOG_LEVEL = 0x100,
583 ARG_LOG_TARGET,
bbe63281
LP		 584 ARG_LOG_COLOR,
585 ARG_LOG_LOCATION,
2f198e2f 586 ARG_UNIT,
edb9aaa8
LP		 587 ARG_SYSTEM,
588 ARG_SESSION,
e537352b 589 ARG_TEST,
80876c20 590 ARG_DUMP_CONFIGURATION_ITEMS,
9e58ff9c
LP		 591 ARG_DUMP_CORE,
592 ARG_CRASH_SHELL,
a16e1123 593 ARG_CONFIRM_SPAWN,
9e58ff9c 594 ARG_SHOW_STATUS,
6e98720f 595 ARG_SYSV_CONSOLE,
4288f619
LP		 596 ARG_DESERIALIZE,
597 ARG_INTROSPECT
f170852a
LP		 598 };
599
600 static const struct option options[] = {
a16e1123
LP		 601 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
602 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
bbe63281
LP		 603 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
604 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
2f198e2f 605 { "unit", required_argument, NULL, ARG_UNIT },
edb9aaa8
LP		 606 { "system", no_argument, NULL, ARG_SYSTEM },
607 { "session", no_argument, NULL, ARG_SESSION },
a16e1123
LP		 608 { "test", no_argument, NULL, ARG_TEST },
609 { "help", no_argument, NULL, 'h' },
610 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
9e58ff9c
LP		 611 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
612 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
a16e1123 613 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
6e98720f 614 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
07459bb6 615#ifdef HAVE_SYSV_COMPAT
6e98720f 616 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
07459bb6 617#endif
a16e1123 618 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
4288f619 619 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
a16e1123 620 { NULL, 0, NULL, 0 }
f170852a
LP		 621 };
622
623 int c, r;
624
625 assert(argc >= 1);
626 assert(argv);
627
1d2e23ab 628 while ((c = getopt_long(argc, argv, "hD", options, NULL)) >= 0)
f170852a
LP		 629
630 switch (c) {
631
632 case ARG_LOG_LEVEL:
633 if ((r = log_set_max_level_from_string(optarg)) < 0) {
634 log_error("Failed to parse log level %s.", optarg);
635 return r;
636 }
637
638 break;
639
640 case ARG_LOG_TARGET:
641
642 if ((r = log_set_target_from_string(optarg)) < 0) {
643 log_error("Failed to parse log target %s.", optarg);
644 return r;
645 }
646
647 break;
648
bbe63281
LP		 649 case ARG_LOG_COLOR:
650
d0b170c8
LP		 651 if (optarg) {
652 if ((r = log_show_color_from_string(optarg)) < 0) {
653 log_error("Failed to parse log color setting %s.", optarg);
654 return r;
655 }
656 } else
657 log_show_color(true);
bbe63281
LP		 658
659 break;
660
661 case ARG_LOG_LOCATION:
662
d0b170c8
LP		 663 if (optarg) {
664 if ((r = log_show_location_from_string(optarg)) < 0) {
665 log_error("Failed to parse log location setting %s.", optarg);
666 return r;
667 }
668 } else
669 log_show_location(true);
bbe63281
LP		 670
671 break;
672
2f198e2f 673 case ARG_UNIT:
f170852a
LP		 674
675 if ((r = set_default_unit(optarg)) < 0) {
676 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
677 return r;
678 }
679
680 break;
681
edb9aaa8
LP		 682 case ARG_SYSTEM:
683 arg_running_as = MANAGER_SYSTEM;
684 break;
a5dab5ce 685
edb9aaa8
LP		 686 case ARG_SESSION:
687 arg_running_as = MANAGER_SESSION;
a5dab5ce 688 break;
a5dab5ce 689
e965d56d 690 case ARG_TEST:
fa0f4d8a 691 arg_action = ACTION_TEST;
e965d56d
LP		 692 break;
693
e537352b 694 case ARG_DUMP_CONFIGURATION_ITEMS:
fa0f4d8a 695 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
e537352b
LP		 696 break;
697
9e58ff9c
LP		 698 case ARG_DUMP_CORE:
699 arg_dump_core = true;
700 break;
701
702 case ARG_CRASH_SHELL:
703 arg_crash_shell = true;
704 break;
705
80876c20 706 case ARG_CONFIRM_SPAWN:
fa0f4d8a 707 arg_confirm_spawn = true;
80876c20
LP		 708 break;
709
9e58ff9c 710 case ARG_SHOW_STATUS:
6e98720f
LP		 711
712 if (optarg) {
713 if ((r = parse_boolean(optarg)) < 0) {
714 log_error("Failed to show status boolean %s.", optarg);
715 return r;
716 }
717 arg_show_status = r;
718 } else
719 arg_show_status = true;
720 break;
07459bb6 721#ifdef HAVE_SYSV_COMPAT
6e98720f
LP		 722 case ARG_SYSV_CONSOLE:
723
724 if (optarg) {
725 if ((r = parse_boolean(optarg)) < 0) {
726 log_error("Failed to SysV console boolean %s.", optarg);
727 return r;
728 }
729 arg_sysv_console = r;
730 } else
731 arg_sysv_console = true;
9e58ff9c 732 break;
07459bb6 733#endif
9e58ff9c 734
a16e1123
LP		 735 case ARG_DESERIALIZE: {
736 int fd;
737 FILE *f;
738
739 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
740 log_error("Failed to parse deserialize option %s.", optarg);
741 return r;
742 }
743
744 if (!(f = fdopen(fd, "r"))) {
745 log_error("Failed to open serialization fd: %m");
746 return r;
747 }
748
749 if (serialization)
750 fclose(serialization);
751
752 serialization = f;
753
754 break;
755 }
756
4288f619
LP		 757 case ARG_INTROSPECT: {
758 const char * const * i = NULL;
759
760 for (i = bus_interface_table; *i; i += 2)
761 if (!optarg || streq(i[0], optarg)) {
762 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
763 "<node>\n", stdout);
764 fputs(i[1], stdout);
765 fputs("</node>\n", stdout);
766
767 if (optarg)
768 break;
769 }
770
771 if (!i[0] && optarg)
772 log_error("Unknown interface %s.", optarg);
773
fa0f4d8a 774 arg_action = ACTION_DONE;
4288f619
LP		 775 break;
776 }
777
f170852a 778 case 'h':
fa0f4d8a 779 arg_action = ACTION_HELP;
f170852a
LP		 780 break;
781
1d2e23ab
LP		 782 case 'D':
783 log_set_max_level(LOG_DEBUG);
784 break;
785
f170852a
LP		 786 case '?':
787 return -EINVAL;
788
789 default:
790 log_error("Unknown option code %c", c);
791 return -EINVAL;
792 }
793
51f0e189
LP		 794 /* PID 1 will get the kernel arguments as parameters, which we
795 * ignore and unconditionally read from
796 * /proc/cmdline. However, we need to ignore those arguments
797 * here. */
fa0f4d8a 798 if (arg_running_as != MANAGER_SYSTEM && optind < argc) {
51f0e189
LP		 799 log_error("Excess arguments.");
800 return -EINVAL;
801 }
802
f170852a
LP		 803 return 0;
804}
805
806static int help(void) {
807
2e33c433 808 printf("%s [OPTIONS...]\n\n"
bbe63281 809 "Starts up and maintains the system or a session.\n\n"
e537352b 810 " -h --help Show this help\n"
e537352b 811 " --test Determine startup sequence, dump it and exit\n"
80876c20 812 " --dump-configuration-items Dump understood unit configuration items\n"
bbe63281 813 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
9e58ff9c 814 " --unit=UNIT Set default unit\n"
edb9aaa8
LP		 815 " --system Run a system instance, even if PID != 1\n"
816 " --session Run a session instance\n"
9e58ff9c
LP		 817 " --dump-core Dump core on crash\n"
818 " --crash-shell Run shell on crash\n"
819 " --confirm-spawn Ask for confirmation when spawning processes\n"
6e98720f 820 " --show-status[=0|1] Show status updates on the console during bootup\n"
07459bb6 821#ifdef HAVE_SYSV_COMPAT
6e98720f 822 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
07459bb6 823#endif
bbe63281 824 " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
9e58ff9c 825 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
2218198b 826 " --log-color[=0|1] Highlight important log messages\n"
bbe63281 827 " --log-location[=0|1] Include code location in log messages\n",
5b6319dc 828 program_invocation_short_name);
f170852a
LP		 829
830 return 0;
831}
832
a16e1123
LP		 833static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
834 FILE *f = NULL;
835 FDSet *fds = NULL;
836 int r;
837
838 assert(m);
839 assert(_f);
840 assert(_fds);
841
d8d5ab98 842 if ((r = manager_open_serialization(m, &f)) < 0) {
a16e1123
LP		 843 log_error("Failed to create serialization faile: %s", strerror(-r));
844 goto fail;
845 }
846
847 if (!(fds = fdset_new())) {
848 r = -ENOMEM;
849 log_error("Failed to allocate fd set: %s", strerror(-r));
850 goto fail;
851 }
852
853 if ((r = manager_serialize(m, f, fds)) < 0) {
854 log_error("Failed to serialize state: %s", strerror(-r));
855 goto fail;
856 }
857
858 if (fseeko(f, 0, SEEK_SET) < 0) {
859 log_error("Failed to rewind serialization fd: %m");
860 goto fail;
861 }
862
863 if ((r = fd_cloexec(fileno(f), false)) < 0) {
864 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
865 goto fail;
866 }
867
868 if ((r = fdset_cloexec(fds, false)) < 0) {
869 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
870 goto fail;
871 }
872
873 *_f = f;
874 *_fds = fds;
875
876 return 0;
877
878fail:
879 fdset_free(fds);
880
881 if (f)
882 fclose(f);
883
884 return r;
885}
886
60918275
LP		 887int main(int argc, char *argv[]) {
888 Manager *m = NULL;
22f4096c 889 int r, retval = EXIT_FAILURE;
a16e1123
LP		 890 FDSet *fds = NULL;
891 bool reexecute = false;
27b14a22 892
2cb1a60d
LP		 893 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
894 /* This is compatbility support for SysV, where
895 * calling init as a user is identical to telinit. */
896
897 errno = -ENOENT;
898 execv(SYSTEMCTL_BINARY_PATH, argv);
899 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
900 return 1;
901 }
902
2cc59dbf 903 log_show_color(isatty(STDERR_FILENO) > 0);
bbe63281 904 log_show_location(false);
7c706717 905 log_set_max_level(LOG_INFO);
bbe63281 906
843d2643 907 if (getpid() == 1) {
fa0f4d8a 908 arg_running_as = MANAGER_SYSTEM;
843d2643 909 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
0ff4cdd9
LP		 910
911 if (label_init() < 0)
912 goto finish;
bbe63281 913 } else {
fa0f4d8a 914 arg_running_as = MANAGER_SESSION;
bbe63281
LP		 915 log_set_target(LOG_TARGET_CONSOLE);
916 }
a5dab5ce 917
f170852a
LP		 918 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
919 goto finish;
60918275 920
f170852a
LP		 921 /* Mount /proc, /sys and friends, so that /proc/cmdline and
922 * /proc/$PID/fd is available. */
ca326f6f 923 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS"))
8efe3c01
LP		 924 if (mount_setup() < 0)
925 goto finish;
4ade7963
LP		 926
927 /* Reset all signal handlers. */
928 assert_se(reset_all_signal_handlers() == 0);
929
078e4539 930 /* If we are init, we can block sigkill. Yay. */
9a34ec5f 931 ignore_signals(SIGNALS_IGNORE, -1);
078e4539 932
487393e9
LP		 933 if (parse_config_file() < 0)
934 goto finish;
935
fa0f4d8a 936 if (arg_running_as == MANAGER_SYSTEM)
a5dab5ce
LP		 937 if (parse_proc_cmdline() < 0)
938 goto finish;
f170852a
LP		 939
940 log_parse_environment();
941
942 if (parse_argv(argc, argv) < 0)
943 goto finish;
944
fa0f4d8a 945 if (arg_action == ACTION_HELP) {
f170852a
LP		 946 retval = help();
947 goto finish;
fa0f4d8a 948 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
e537352b 949 unit_dump_config_items(stdout);
22f4096c 950 retval = EXIT_SUCCESS;
e537352b 951 goto finish;
fa0f4d8a 952 } else if (arg_action == ACTION_DONE) {
22f4096c 953 retval = EXIT_SUCCESS;
4288f619 954 goto finish;
f170852a
LP		 955 }
956
fa0f4d8a 957 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
f170852a 958
a16e1123
LP		 959 /* Remember open file descriptors for later deserialization */
960 if (serialization) {
961 if ((r = fdset_new_fill(&fds)) < 0) {
962 log_error("Failed to allocate fd set: %s", strerror(-r));
963 goto finish;
964 }
965
966 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
967 } else
968 close_all_fds(NULL, 0);
969
09082a94 970 /* Set up PATH unless it is already set */
e537352b
LP		 971 setenv("PATH",
972 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
fa0f4d8a 973 arg_running_as == MANAGER_SYSTEM);
09082a94 974
f170852a
LP		 975 /* Move out of the way, so that we won't block unmounts */
976 assert_se(chdir("/") == 0);
977
fa0f4d8a 978 if (arg_running_as == MANAGER_SYSTEM) {
80876c20
LP		 979 /* Become a session leader if we aren't one yet. */
980 setsid();
4ade7963 981
80876c20
LP		 982 /* Disable the umask logic */
983 umask(0);
984 }
985
843d2643
LP		 986 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
987 dbus_connection_set_change_sigpipe(FALSE);
988
2146621b
LP		 989 /* Reset the console, but only if this is really init and we
990 * are freshly booted */
fa0f4d8a 991 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
2146621b 992 console_setup(getpid() == 1 && !serialization);
843d2643
LP		 993 make_null_stdio();
994 }
4ade7963 995
18149b9f 996 /* Open the logging devices, if possible and necessary */
843d2643 997 log_open();
4ade7963 998
5373d602
LP		 999 /* Make sure we leave a core dump without panicing the
1000 * kernel. */
4fc935ca
LP		 1001 if (getpid() == 1)
1002 install_crash_handler();
97c4f35c 1003
302e27c8 1004 log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
7d568925 1005 PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
a5dab5ce 1006
888c6216 1007 if (arg_running_as == MANAGER_SYSTEM && !serialization) {
72bca11b
LP		 1008 locale_setup();
1009
888c6216
LP		 1010 if (arg_show_status)
1011 status_welcome();
1012
888c6216
LP		 1013 kmod_setup();
1014 hostname_setup();
1015 loopback_setup();
490aed58
LP		 1016
1017 mkdir_p("/dev/.systemd/ask-password/", 0755);
af5bc85d 1018 }
302e8c4c 1019
9e58ff9c 1020 if ((r = manager_new(arg_running_as, &m)) < 0) {
8e274523 1021 log_error("Failed to allocate manager object: %s", strerror(-r));
60918275
LP		 1022 goto finish;
1023 }
1024
9e58ff9c
LP		 1025 m->confirm_spawn = arg_confirm_spawn;
1026 m->show_status = arg_show_status;
07459bb6 1027#ifdef HAVE_SYSV_COMPAT
6e98720f 1028 m->sysv_console = arg_sysv_console;
07459bb6 1029#endif
d3689161 1030 m->mount_auto = arg_mount_auto;
173a8d04 1031 m->swap_auto = arg_swap_auto;
9e58ff9c 1032
b2bb3dbe
LP		 1033 if (arg_console)
1034 manager_set_console(m, arg_console);
1035
a16e1123 1036 if ((r = manager_startup(m, serialization, fds)) < 0)
6e2ef85b 1037 log_error("Failed to fully start up daemon: %s", strerror(-r));
a16e1123
LP		 1038
1039 if (fds) {
1040 /* This will close all file descriptors that were opened, but
1041 * not claimed by any unit. */
1042
1043 fdset_free(fds);
1044 fds = NULL;
f50e0a01
LP		 1045 }
1046
a16e1123
LP		 1047 if (serialization) {
1048 fclose(serialization);
1049 serialization = NULL;
1050 } else {
398ef8ba 1051 DBusError error;
1c27d3f3 1052 Unit *target = NULL;
398ef8ba
LP		 1053
1054 dbus_error_init(&error);
1055
fa0f4d8a 1056 log_debug("Activating default unit: %s", arg_default_unit);
a16e1123 1057
398ef8ba
LP		 1058 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1059 log_error("Failed to load default target: %s", bus_error(&error, r));
1060 dbus_error_free(&error);
00dc5d76 1061 } else if (target->meta.load_state == UNIT_ERROR)
1c27d3f3 1062 log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
6daf4f90
LP		 1063 else if (target->meta.load_state == UNIT_MASKED)
1064 log_error("Default target masked.");
27b14a22 1065
1c27d3f3 1066 if (!target || target->meta.load_state != UNIT_LOADED) {
a16e1123 1067 log_info("Trying to load rescue target...");
1c27d3f3 1068
398ef8ba
LP		 1069 if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1070 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1071 dbus_error_free(&error);
a16e1123 1072 goto finish;
00dc5d76 1073 } else if (target->meta.load_state == UNIT_ERROR) {
1c27d3f3
LP		 1074 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1075 goto finish;
6daf4f90
LP		 1076 } else if (target->meta.load_state == UNIT_MASKED) {
1077 log_error("Rescue target masked.");
00dc5d76 1078 goto finish;
a16e1123
LP		 1079 }
1080 }
37d88da7 1081
00dc5d76
LP		 1082 assert(target->meta.load_state == UNIT_LOADED);
1083
fa0f4d8a 1084 if (arg_action == ACTION_TEST) {
40d50879 1085 printf("-> By units:\n");
a16e1123
LP		 1086 manager_dump_units(m, stdout, "\t");
1087 }
1088
0ff4cdd9 1089 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
398ef8ba
LP		 1090 log_error("Failed to start default target: %s", bus_error(&error, r));
1091 dbus_error_free(&error);
37d88da7
LP		 1092 goto finish;
1093 }
60918275 1094
fa0f4d8a 1095 if (arg_action == ACTION_TEST) {
40d50879 1096 printf("-> By jobs:\n");
a16e1123 1097 manager_dump_jobs(m, stdout, "\t");
22f4096c 1098 retval = EXIT_SUCCESS;
a16e1123
LP		 1099 goto finish;
1100 }
e965d56d 1101 }
d46de8a1 1102
a16e1123
LP		 1103 for (;;) {
1104 if ((r = manager_loop(m)) < 0) {
1105 log_error("Failed to run mainloop: %s", strerror(-r));
1106 goto finish;
1107 }
11dd41ce 1108
a16e1123 1109 switch (m->exit_code) {
e965d56d 1110
a16e1123 1111 case MANAGER_EXIT:
22f4096c 1112 retval = EXIT_SUCCESS;
a16e1123
LP		 1113 log_debug("Exit.");
1114 goto finish;
e965d56d 1115
a16e1123 1116 case MANAGER_RELOAD:
e015090f 1117 log_info("Reloading.");
a16e1123
LP		 1118 if ((r = manager_reload(m)) < 0)
1119 log_error("Failed to reload: %s", strerror(-r));
1120 break;
cea8e32e 1121
a16e1123 1122 case MANAGER_REEXECUTE:
a16e1123
LP		 1123 if (prepare_reexecute(m, &serialization, &fds) < 0)
1124 goto finish;
60918275 1125
a16e1123 1126 reexecute = true;
e015090f 1127 log_notice("Reexecuting.");
a16e1123
LP		 1128 goto finish;
1129
1130 default:
1131 assert_not_reached("Unknown exit code.");
1132 }
1133 }
f170852a 1134
60918275
LP		 1135finish:
1136 if (m)
1137 manager_free(m);
1138
fa0f4d8a 1139 free(arg_default_unit);
b2bb3dbe 1140 free(arg_console);
b9cd2ec1 1141
ea430986
LP		 1142 dbus_shutdown();
1143
b2bb3dbe
LP		 1144 label_finish();
1145
a16e1123 1146 if (reexecute) {
6e98720f 1147 const char *args[15];
a16e1123
LP		 1148 unsigned i = 0;
1149 char sfd[16];
1150
1151 assert(serialization);
1152 assert(fds);
1153
1154 args[i++] = SYSTEMD_BINARY_PATH;
1155
1156 args[i++] = "--log-level";
1157 args[i++] = log_level_to_string(log_get_max_level());
1158
1159 args[i++] = "--log-target";
1160 args[i++] = log_target_to_string(log_get_target());
1161
edb9aaa8
LP		 1162 if (arg_running_as == MANAGER_SYSTEM)
1163 args[i++] = "--system";
1164 else
1165 args[i++] = "--session";
1166
1167 if (arg_dump_core)
1168 args[i++] = "--dump-core";
1169
1170 if (arg_crash_shell)
1171 args[i++] = "--crash-shell";
1172
1173 if (arg_confirm_spawn)
1174 args[i++] = "--confirm-spawn";
1175
1176 if (arg_show_status)
6e98720f
LP		 1177 args[i++] = "--show-status=1";
1178 else
1179 args[i++] = "--show-status=0";
1180
07459bb6 1181#ifdef HAVE_SYSV_COMPAT
6e98720f
LP		 1182 if (arg_sysv_console)
1183 args[i++] = "--sysv-console=1";
1184 else
1185 args[i++] = "--sysv-console=0";
07459bb6 1186#endif
a16e1123
LP		 1187
1188 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1189 char_array_0(sfd);
1190
1191 args[i++] = "--deserialize";
1192 args[i++] = sfd;
1193
a16e1123
LP		 1194 args[i++] = NULL;
1195
1196 assert(i <= ELEMENTSOF(args));
1197
1198 execv(args[0], (char* const*) args);
1199
1200 log_error("Failed to reexecute: %m");
1201 }
1202
1203 if (serialization)
1204 fclose(serialization);
1205
1206 if (fds)
1207 fdset_free(fds);
1208
c3b3c274
LP		 1209 if (getpid() == 1)
1210 freeze();
1211
60918275
LP		 1212 return retval;
1213}
Unnamed repository; edit this file 'description' to name the repository.