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modules-load: fix minor race
[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"
c4dcdb9f 42#include "selinux-setup.h"
302e8c4c 43#include "load-fragment.h"
a16e1123 44#include "fdset.h"
514f4ef5 45#include "special.h"
487393e9 46#include "conf-parser.h"
398ef8ba 47#include "bus-errors.h"
ad780f19 48#include "missing.h"
e51bc1a2 49#include "label.h"
302e27c8 50#include "build.h"
60918275 51
f170852a
LP		 52static enum {
53 ACTION_RUN,
e965d56d 54 ACTION_HELP,
e537352b 55 ACTION_TEST,
4288f619
LP		 56 ACTION_DUMP_CONFIGURATION_ITEMS,
57 ACTION_DONE
fa0f4d8a 58} arg_action = ACTION_RUN;
f170852a 59
fa0f4d8a
LP		 60static char *arg_default_unit = NULL;
61static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
62
63static bool arg_dump_core = true;
64static bool arg_crash_shell = false;
65static int arg_crash_chvt = -1;
66static bool arg_confirm_spawn = false;
9e58ff9c 67static bool arg_show_status = true;
07459bb6 68#ifdef HAVE_SYSV_COMPAT
6e98720f 69static bool arg_sysv_console = true;
07459bb6 70#endif
d3689161 71static bool arg_mount_auto = true;
173a8d04 72static bool arg_swap_auto = true;
b2bb3dbe 73static char *arg_console = NULL;
4fc935ca 74
a16e1123 75static FILE* serialization = NULL;
80876c20 76
6f5e3f35
LP		 77static void nop_handler(int sig) {
78}
79
93a46b0b 80_noreturn_ static void crash(int sig) {
97c4f35c 81
fa0f4d8a 82 if (!arg_dump_core)
582a507f 83 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
97c4f35c 84 else {
6f5e3f35 85 struct sigaction sa;
97c4f35c
LP		 86 pid_t pid;
87
6f5e3f35
LP		 88 /* We want to wait for the core process, hence let's enable SIGCHLD */
89 zero(sa);
90 sa.sa_handler = nop_handler;
91 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
92 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
93
97c4f35c 94 if ((pid = fork()) < 0)
582a507f 95 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
97c4f35c
LP		 96
97 else if (pid == 0) {
97c4f35c
LP		 98 struct rlimit rl;
99
100 /* Enable default signal handler for core dump */
101 zero(sa);
102 sa.sa_handler = SIG_DFL;
103 assert_se(sigaction(sig, &sa, NULL) == 0);
104
105 /* Don't limit the core dump size */
106 zero(rl);
107 rl.rlim_cur = RLIM_INFINITY;
108 rl.rlim_max = RLIM_INFINITY;
109 setrlimit(RLIMIT_CORE, &rl);
110
111 /* Just to be sure... */
112 assert_se(chdir("/") == 0);
113
114 /* Raise the signal again */
115 raise(sig);
116
117 assert_not_reached("We shouldn't be here...");
118 _exit(1);
4fc935ca
LP		 119
120 } else {
8e12a6ae
LP		 121 siginfo_t status;
122 int r;
4fc935ca
LP		 123
124 /* Order things nicely. */
8e12a6ae
LP		 125 if ((r = wait_for_terminate(pid, &status)) < 0)
126 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
127 else if (status.si_code != CLD_DUMPED)
582a507f 128 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
4fc935ca 129 else
582a507f 130 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
97c4f35c
LP		 131 }
132 }
133
fa0f4d8a
LP		 134 if (arg_crash_chvt)
135 chvt(arg_crash_chvt);
601f6a1e 136
fa0f4d8a 137 if (arg_crash_shell) {
6f5e3f35
LP		 138 struct sigaction sa;
139 pid_t pid;
8c43883a 140
4fc935ca
LP		 141 log_info("Executing crash shell in 10s...");
142 sleep(10);
143
6f5e3f35
LP		 144 /* Let the kernel reap children for us */
145 zero(sa);
146 sa.sa_handler = SIG_IGN;
147 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
148 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
8c43883a 149
6f5e3f35
LP		 150 if ((pid = fork()) < 0)
151 log_error("Failed to fork off crash shell: %s", strerror(errno));
152 else if (pid == 0) {
843d2643 153 int fd, r;
ea5652c2 154
21de3988 155 if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
ea5652c2 156 log_error("Failed to acquire terminal: %s", strerror(-fd));
5b2a0903 157 else if ((r = make_stdio(fd)) < 0)
843d2643 158 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
ea5652c2 159
6f5e3f35
LP		 160 execl("/bin/sh", "/bin/sh", NULL);
161
162 log_error("execl() failed: %s", strerror(errno));
163 _exit(1);
164 }
c99b188e 165
bb00e604 166 log_info("Successfully spawned crash shall as pid %lu.", (unsigned long) pid);
4fc935ca
LP		 167 }
168
169 log_info("Freezing execution.");
97c4f35c
LP		 170 freeze();
171}
172
173static void install_crash_handler(void) {
174 struct sigaction sa;
175
176 zero(sa);
177
178 sa.sa_handler = crash;
179 sa.sa_flags = SA_NODEFER;
180
1b91d3e8 181 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
97c4f35c 182}
f170852a 183
843d2643
LP		 184static int console_setup(bool do_reset) {
185 int tty_fd, r;
80876c20 186
843d2643
LP		 187 /* If we are init, we connect stdin/stdout/stderr to /dev/null
188 * and make sure we don't have a controlling tty. */
80876c20 189
843d2643
LP		 190 release_terminal();
191
192 if (!do_reset)
193 return 0;
80876c20 194
843d2643
LP		 195 if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
196 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
197 return -tty_fd;
198 }
80876c20 199
843d2643
LP		 200 if ((r = reset_terminal(tty_fd)) < 0)
201 log_error("Failed to reset /dev/console: %s", strerror(-r));
202
203 close_nointr_nofail(tty_fd);
80876c20
LP		 204 return r;
205}
206
f170852a
LP		 207static int set_default_unit(const char *u) {
208 char *c;
209
210 assert(u);
211
212 if (!(c = strdup(u)))
213 return -ENOMEM;
214
fa0f4d8a
LP		 215 free(arg_default_unit);
216 arg_default_unit = c;
f170852a
LP		 217 return 0;
218}
219
220static int parse_proc_cmdline_word(const char *word) {
221
222 static const char * const rlmap[] = {
ed370f5d
LP		 223 "emergency", SPECIAL_EMERGENCY_TARGET,
224 "single", SPECIAL_RESCUE_TARGET,
225 "-s", SPECIAL_RESCUE_TARGET,
226 "s", SPECIAL_RESCUE_TARGET,
227 "S", SPECIAL_RESCUE_TARGET,
228 "1", SPECIAL_RESCUE_TARGET,
229 "2", SPECIAL_RUNLEVEL2_TARGET,
230 "3", SPECIAL_RUNLEVEL3_TARGET,
231 "4", SPECIAL_RUNLEVEL4_TARGET,
232 "5", SPECIAL_RUNLEVEL5_TARGET,
f170852a
LP		 233 };
234
5192bd19
LP		 235 assert(word);
236
2f198e2f
LP		 237 if (startswith(word, "systemd.unit="))
238 return set_default_unit(word + 13);
f170852a
LP		 239
240 else if (startswith(word, "systemd.log_target=")) {
241
242 if (log_set_target_from_string(word + 19) < 0)
243 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
244
245 } else if (startswith(word, "systemd.log_level=")) {
246
247 if (log_set_max_level_from_string(word + 18) < 0)
248 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
249
bbe63281
LP		 250 } else if (startswith(word, "systemd.log_color=")) {
251
252 if (log_show_color_from_string(word + 18) < 0)
253 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
254
255 } else if (startswith(word, "systemd.log_location=")) {
256
257 if (log_show_location_from_string(word + 21) < 0)
258 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
259
4fc935ca
LP		 260 } else if (startswith(word, "systemd.dump_core=")) {
261 int r;
262
263 if ((r = parse_boolean(word + 18)) < 0)
601f6a1e 264 log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
4fc935ca 265 else
fa0f4d8a 266 arg_dump_core = r;
4fc935ca
LP		 267
268 } else if (startswith(word, "systemd.crash_shell=")) {
269 int r;
270
271 if ((r = parse_boolean(word + 20)) < 0)
601f6a1e 272 log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
4fc935ca 273 else
fa0f4d8a 274 arg_crash_shell = r;
5e7ee61c
LP		 275
276 } else if (startswith(word, "systemd.confirm_spawn=")) {
277 int r;
278
279 if ((r = parse_boolean(word + 22)) < 0)
280 log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
281 else
fa0f4d8a 282 arg_confirm_spawn = r;
5e7ee61c 283
601f6a1e
LP		 284 } else if (startswith(word, "systemd.crash_chvt=")) {
285 int k;
286
287 if (safe_atoi(word + 19, &k) < 0)
288 log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
289 else
fa0f4d8a 290 arg_crash_chvt = k;
601f6a1e 291
9e58ff9c
LP		 292 } else if (startswith(word, "systemd.show_status=")) {
293 int r;
294
295 if ((r = parse_boolean(word + 20)) < 0)
296 log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
6e98720f 297 else
9e58ff9c 298 arg_show_status = r;
07459bb6 299#ifdef HAVE_SYSV_COMPAT
6e98720f
LP		 300 } else if (startswith(word, "systemd.sysv_console=")) {
301 int r;
302
303 if ((r = parse_boolean(word + 21)) < 0)
304 log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
305 else
306 arg_sysv_console = r;
07459bb6 307#endif
9e58ff9c 308
4fc935ca
LP		 309 } else if (startswith(word, "systemd.")) {
310
311 log_warning("Unknown kernel switch %s. Ignoring.", word);
312
bbe63281
LP		 313 log_info("Supported kernel switches:\n"
314 "systemd.unit=UNIT Default unit to start\n"
bbe63281 315 "systemd.dump_core=0|1 Dump core on crash\n"
9e58ff9c 316 "systemd.crash_shell=0|1 Run shell on crash\n"
bbe63281 317 "systemd.crash_chvt=N Change to VT #N on crash\n"
9e58ff9c 318 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
6e98720f 319 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
07459bb6 320#ifdef HAVE_SYSV_COMPAT
6e98720f 321 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
07459bb6 322#endif
87d1969b 323 "systemd.log_target=console|kmsg|syslog|syslog-or-kmsg|null\n"
6e98720f
LP		 324 " Log target\n"
325 "systemd.log_level=LEVEL Log level\n"
326 "systemd.log_color=0|1 Highlight important log messages\n"
327 "systemd.log_location=0|1 Include code location in log messages\n");
4fc935ca 328
b2bb3dbe
LP		 329 } else if (startswith(word, "console=")) {
330 const char *k;
331 size_t l;
332 char *w = NULL;
333
334 k = word + 8;
335 l = strcspn(k, ",");
336
337 /* Ignore the console setting if set to a VT */
338 if (l < 4 ||
339 !startswith(k, "tty") ||
340 k[3+strspn(k+3, "0123456789")] != 0) {
341
342 if (!(w = strndup(k, l)))
343 return -ENOMEM;
344 }
345
346 free(arg_console);
347 arg_console = w;
348
a9c501a5 349 } else if (streq(word, "quiet")) {
6e98720f 350 arg_show_status = false;
07459bb6 351#ifdef HAVE_SYSV_COMPAT
6e98720f 352 arg_sysv_console = false;
07459bb6 353#endif
9e58ff9c 354 } else {
f170852a
LP		 355 unsigned i;
356
357 /* SysV compatibility */
f170852a
LP		 358 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
359 if (streq(word, rlmap[i]))
360 return set_default_unit(rlmap[i+1]);
361 }
362
363 return 0;
364}
365
487393e9
LP		 366static int config_parse_level(
367 const char *filename,
368 unsigned line,
369 const char *section,
370 const char *lvalue,
371 const char *rvalue,
372 void *data,
373 void *userdata) {
374
375 assert(filename);
376 assert(lvalue);
377 assert(rvalue);
378
379 log_set_max_level_from_string(rvalue);
380 return 0;
381}
382
383static int config_parse_target(
384 const char *filename,
385 unsigned line,
386 const char *section,
387 const char *lvalue,
388 const char *rvalue,
389 void *data,
390 void *userdata) {
391
392 assert(filename);
393 assert(lvalue);
394 assert(rvalue);
395
396 log_set_target_from_string(rvalue);
397 return 0;
398}
399
400static int config_parse_color(
401 const char *filename,
402 unsigned line,
403 const char *section,
404 const char *lvalue,
405 const char *rvalue,
406 void *data,
407 void *userdata) {
408
409 assert(filename);
410 assert(lvalue);
411 assert(rvalue);
412
413 log_show_color_from_string(rvalue);
414 return 0;
415}
416
417static int config_parse_location(
418 const char *filename,
419 unsigned line,
420 const char *section,
421 const char *lvalue,
422 const char *rvalue,
423 void *data,
424 void *userdata) {
425
426 assert(filename);
427 assert(lvalue);
428 assert(rvalue);
429
430 log_show_location_from_string(rvalue);
431 return 0;
432}
433
434static int config_parse_cpu_affinity(
435 const char *filename,
436 unsigned line,
437 const char *section,
438 const char *lvalue,
439 const char *rvalue,
440 void *data,
441 void *userdata) {
442
443 char *w;
444 size_t l;
445 char *state;
446 cpu_set_t *c = NULL;
447 unsigned ncpus = 0;
448
449 assert(filename);
450 assert(lvalue);
451 assert(rvalue);
452
f60f22df 453 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
487393e9
LP		 454 char *t;
455 int r;
456 unsigned cpu;
457
458 if (!(t = strndup(w, l)))
459 return -ENOMEM;
460
461 r = safe_atou(t, &cpu);
462 free(t);
463
464 if (!c)
465 if (!(c = cpu_set_malloc(&ncpus)))
466 return -ENOMEM;
467
468 if (r < 0 || cpu >= ncpus) {
469 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
470 CPU_FREE(c);
471 return -EBADMSG;
472 }
473
474 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
475 }
476
477 if (c) {
478 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
479 log_warning("Failed to set CPU affinity: %m");
480
481 CPU_FREE(c);
482 }
483
484 return 0;
485}
486
487static int parse_config_file(void) {
488
489 const ConfigItem items[] = {
d3689161
LP		 490 { "LogLevel", config_parse_level, NULL, "Manager" },
491 { "LogTarget", config_parse_target, NULL, "Manager" },
492 { "LogColor", config_parse_color, NULL, "Manager" },
493 { "LogLocation", config_parse_location, NULL, "Manager" },
494 { "DumpCore", config_parse_bool, &arg_dump_core, "Manager" },
495 { "CrashShell", config_parse_bool, &arg_crash_shell, "Manager" },
496 { "ShowStatus", config_parse_bool, &arg_show_status, "Manager" },
07459bb6 497#ifdef HAVE_SYSV_COMPAT
d3689161 498 { "SysVConsole", config_parse_bool, &arg_sysv_console, "Manager" },
07459bb6 499#endif
d3689161
LP		 500 { "CrashChVT", config_parse_int, &arg_crash_chvt, "Manager" },
501 { "CPUAffinity", config_parse_cpu_affinity, NULL, "Manager" },
d3689161 502 { "MountAuto", config_parse_bool, &arg_mount_auto, "Manager" },
173a8d04 503 { "SwapAuto", config_parse_bool, &arg_swap_auto, "Manager" },
487393e9
LP		 504 { NULL, NULL, NULL, NULL }
505 };
506
507 static const char * const sections[] = {
508 "Manager",
509 NULL
510 };
511
512 FILE *f;
513 const char *fn;
514 int r;
515
516 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : SESSION_CONFIG_FILE;
517
518 if (!(f = fopen(fn, "re"))) {
519 if (errno == ENOENT)
520 return 0;
521
522 log_warning("Failed to open configuration file '%s': %m", fn);
523 return 0;
524 }
525
526 if ((r = config_parse(fn, f, sections, items, false, NULL)) < 0)
527 log_warning("Failed to parse configuration file: %s", strerror(-r));
528
529 fclose(f);
530
531 return 0;
532}
533
f170852a 534static int parse_proc_cmdline(void) {
52661efd 535 char *line, *w, *state;
f170852a 536 int r;
f170852a 537 size_t l;
f170852a
LP		 538
539 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
e364ad06 540 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
f170852a
LP		 541 return 0;
542 }
543
544 FOREACH_WORD_QUOTED(w, l, line, state) {
545 char *word;
546
547 if (!(word = strndup(w, l))) {
548 r = -ENOMEM;
549 goto finish;
550 }
551
552 r = parse_proc_cmdline_word(word);
553 free(word);
554
555 if (r < 0)
556 goto finish;
557 }
558
559 r = 0;
560
561finish:
562 free(line);
563 return r;
564}
565
566static int parse_argv(int argc, char *argv[]) {
567
568 enum {
569 ARG_LOG_LEVEL = 0x100,
570 ARG_LOG_TARGET,
bbe63281
LP		 571 ARG_LOG_COLOR,
572 ARG_LOG_LOCATION,
2f198e2f 573 ARG_UNIT,
edb9aaa8
LP		 574 ARG_SYSTEM,
575 ARG_SESSION,
e537352b 576 ARG_TEST,
80876c20 577 ARG_DUMP_CONFIGURATION_ITEMS,
9e58ff9c
LP		 578 ARG_DUMP_CORE,
579 ARG_CRASH_SHELL,
a16e1123 580 ARG_CONFIRM_SPAWN,
9e58ff9c 581 ARG_SHOW_STATUS,
6e98720f 582 ARG_SYSV_CONSOLE,
4288f619
LP		 583 ARG_DESERIALIZE,
584 ARG_INTROSPECT
f170852a
LP		 585 };
586
587 static const struct option options[] = {
a16e1123
LP		 588 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
589 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
bbe63281
LP		 590 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
591 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
2f198e2f 592 { "unit", required_argument, NULL, ARG_UNIT },
edb9aaa8
LP		 593 { "system", no_argument, NULL, ARG_SYSTEM },
594 { "session", no_argument, NULL, ARG_SESSION },
a16e1123
LP		 595 { "test", no_argument, NULL, ARG_TEST },
596 { "help", no_argument, NULL, 'h' },
597 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
9e58ff9c
LP		 598 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
599 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
a16e1123 600 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
6e98720f 601 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
07459bb6 602#ifdef HAVE_SYSV_COMPAT
6e98720f 603 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
07459bb6 604#endif
a16e1123 605 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
4288f619 606 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
a16e1123 607 { NULL, 0, NULL, 0 }
f170852a
LP		 608 };
609
610 int c, r;
611
612 assert(argc >= 1);
613 assert(argv);
614
1d2e23ab 615 while ((c = getopt_long(argc, argv, "hD", options, NULL)) >= 0)
f170852a
LP		 616
617 switch (c) {
618
619 case ARG_LOG_LEVEL:
620 if ((r = log_set_max_level_from_string(optarg)) < 0) {
621 log_error("Failed to parse log level %s.", optarg);
622 return r;
623 }
624
625 break;
626
627 case ARG_LOG_TARGET:
628
629 if ((r = log_set_target_from_string(optarg)) < 0) {
630 log_error("Failed to parse log target %s.", optarg);
631 return r;
632 }
633
634 break;
635
bbe63281
LP		 636 case ARG_LOG_COLOR:
637
d0b170c8
LP		 638 if (optarg) {
639 if ((r = log_show_color_from_string(optarg)) < 0) {
640 log_error("Failed to parse log color setting %s.", optarg);
641 return r;
642 }
643 } else
644 log_show_color(true);
bbe63281
LP		 645
646 break;
647
648 case ARG_LOG_LOCATION:
649
d0b170c8
LP		 650 if (optarg) {
651 if ((r = log_show_location_from_string(optarg)) < 0) {
652 log_error("Failed to parse log location setting %s.", optarg);
653 return r;
654 }
655 } else
656 log_show_location(true);
bbe63281
LP		 657
658 break;
659
2f198e2f 660 case ARG_UNIT:
f170852a
LP		 661
662 if ((r = set_default_unit(optarg)) < 0) {
663 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
664 return r;
665 }
666
667 break;
668
edb9aaa8
LP		 669 case ARG_SYSTEM:
670 arg_running_as = MANAGER_SYSTEM;
671 break;
a5dab5ce 672
edb9aaa8
LP		 673 case ARG_SESSION:
674 arg_running_as = MANAGER_SESSION;
a5dab5ce 675 break;
a5dab5ce 676
e965d56d 677 case ARG_TEST:
fa0f4d8a 678 arg_action = ACTION_TEST;
e965d56d
LP		 679 break;
680
e537352b 681 case ARG_DUMP_CONFIGURATION_ITEMS:
fa0f4d8a 682 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
e537352b
LP		 683 break;
684
9e58ff9c
LP		 685 case ARG_DUMP_CORE:
686 arg_dump_core = true;
687 break;
688
689 case ARG_CRASH_SHELL:
690 arg_crash_shell = true;
691 break;
692
80876c20 693 case ARG_CONFIRM_SPAWN:
fa0f4d8a 694 arg_confirm_spawn = true;
80876c20
LP		 695 break;
696
9e58ff9c 697 case ARG_SHOW_STATUS:
6e98720f
LP		 698
699 if (optarg) {
700 if ((r = parse_boolean(optarg)) < 0) {
701 log_error("Failed to show status boolean %s.", optarg);
702 return r;
703 }
704 arg_show_status = r;
705 } else
706 arg_show_status = true;
707 break;
07459bb6 708#ifdef HAVE_SYSV_COMPAT
6e98720f
LP		 709 case ARG_SYSV_CONSOLE:
710
711 if (optarg) {
712 if ((r = parse_boolean(optarg)) < 0) {
713 log_error("Failed to SysV console boolean %s.", optarg);
714 return r;
715 }
716 arg_sysv_console = r;
717 } else
718 arg_sysv_console = true;
9e58ff9c 719 break;
07459bb6 720#endif
9e58ff9c 721
a16e1123
LP		 722 case ARG_DESERIALIZE: {
723 int fd;
724 FILE *f;
725
726 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
727 log_error("Failed to parse deserialize option %s.", optarg);
728 return r;
729 }
730
731 if (!(f = fdopen(fd, "r"))) {
732 log_error("Failed to open serialization fd: %m");
733 return r;
734 }
735
736 if (serialization)
737 fclose(serialization);
738
739 serialization = f;
740
741 break;
742 }
743
4288f619
LP		 744 case ARG_INTROSPECT: {
745 const char * const * i = NULL;
746
747 for (i = bus_interface_table; *i; i += 2)
748 if (!optarg || streq(i[0], optarg)) {
749 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
750 "<node>\n", stdout);
751 fputs(i[1], stdout);
752 fputs("</node>\n", stdout);
753
754 if (optarg)
755 break;
756 }
757
758 if (!i[0] && optarg)
759 log_error("Unknown interface %s.", optarg);
760
fa0f4d8a 761 arg_action = ACTION_DONE;
4288f619
LP		 762 break;
763 }
764
f170852a 765 case 'h':
fa0f4d8a 766 arg_action = ACTION_HELP;
f170852a
LP		 767 break;
768
1d2e23ab
LP		 769 case 'D':
770 log_set_max_level(LOG_DEBUG);
771 break;
772
f170852a
LP		 773 case '?':
774 return -EINVAL;
775
776 default:
777 log_error("Unknown option code %c", c);
778 return -EINVAL;
779 }
780
51f0e189
LP		 781 /* PID 1 will get the kernel arguments as parameters, which we
782 * ignore and unconditionally read from
783 * /proc/cmdline. However, we need to ignore those arguments
784 * here. */
fa0f4d8a 785 if (arg_running_as != MANAGER_SYSTEM && optind < argc) {
51f0e189
LP		 786 log_error("Excess arguments.");
787 return -EINVAL;
788 }
789
f170852a
LP		 790 return 0;
791}
792
793static int help(void) {
794
2e33c433 795 printf("%s [OPTIONS...]\n\n"
bbe63281 796 "Starts up and maintains the system or a session.\n\n"
e537352b 797 " -h --help Show this help\n"
e537352b 798 " --test Determine startup sequence, dump it and exit\n"
80876c20 799 " --dump-configuration-items Dump understood unit configuration items\n"
bbe63281 800 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
9e58ff9c 801 " --unit=UNIT Set default unit\n"
edb9aaa8
LP		 802 " --system Run a system instance, even if PID != 1\n"
803 " --session Run a session instance\n"
9e58ff9c
LP		 804 " --dump-core Dump core on crash\n"
805 " --crash-shell Run shell on crash\n"
806 " --confirm-spawn Ask for confirmation when spawning processes\n"
6e98720f 807 " --show-status[=0|1] Show status updates on the console during bootup\n"
07459bb6 808#ifdef HAVE_SYSV_COMPAT
6e98720f 809 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
07459bb6 810#endif
bbe63281 811 " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
9e58ff9c 812 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
2218198b 813 " --log-color[=0|1] Highlight important log messages\n"
bbe63281 814 " --log-location[=0|1] Include code location in log messages\n",
5b6319dc 815 program_invocation_short_name);
f170852a
LP		 816
817 return 0;
818}
819
a16e1123
LP		 820static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
821 FILE *f = NULL;
822 FDSet *fds = NULL;
823 int r;
824
825 assert(m);
826 assert(_f);
827 assert(_fds);
828
d8d5ab98 829 if ((r = manager_open_serialization(m, &f)) < 0) {
a16e1123
LP		 830 log_error("Failed to create serialization faile: %s", strerror(-r));
831 goto fail;
832 }
833
834 if (!(fds = fdset_new())) {
835 r = -ENOMEM;
836 log_error("Failed to allocate fd set: %s", strerror(-r));
837 goto fail;
838 }
839
840 if ((r = manager_serialize(m, f, fds)) < 0) {
841 log_error("Failed to serialize state: %s", strerror(-r));
842 goto fail;
843 }
844
845 if (fseeko(f, 0, SEEK_SET) < 0) {
846 log_error("Failed to rewind serialization fd: %m");
847 goto fail;
848 }
849
850 if ((r = fd_cloexec(fileno(f), false)) < 0) {
851 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
852 goto fail;
853 }
854
855 if ((r = fdset_cloexec(fds, false)) < 0) {
856 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
857 goto fail;
858 }
859
860 *_f = f;
861 *_fds = fds;
862
863 return 0;
864
865fail:
866 fdset_free(fds);
867
868 if (f)
869 fclose(f);
870
871 return r;
872}
873
60918275
LP		 874int main(int argc, char *argv[]) {
875 Manager *m = NULL;
22f4096c 876 int r, retval = EXIT_FAILURE;
a16e1123
LP		 877 FDSet *fds = NULL;
878 bool reexecute = false;
b9080b03 879 const char *shutdown_verb = NULL;
27b14a22 880
2cb1a60d
LP		 881 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
882 /* This is compatbility support for SysV, where
883 * calling init as a user is identical to telinit. */
884
885 errno = -ENOENT;
886 execv(SYSTEMCTL_BINARY_PATH, argv);
887 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
888 return 1;
889 }
890
2cc59dbf 891 log_show_color(isatty(STDERR_FILENO) > 0);
bbe63281 892 log_show_location(false);
7c706717 893 log_set_max_level(LOG_INFO);
bbe63281 894
843d2643 895 if (getpid() == 1) {
fa0f4d8a 896 arg_running_as = MANAGER_SYSTEM;
843d2643 897 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
0ff4cdd9 898
c4dcdb9f
LP		 899 /* This might actually not return, but cause a
900 * reexecution */
901 if (selinux_setup(argv) < 0)
902 goto finish;
903
0ff4cdd9
LP		 904 if (label_init() < 0)
905 goto finish;
bbe63281 906 } else {
fa0f4d8a 907 arg_running_as = MANAGER_SESSION;
bbe63281
LP		 908 log_set_target(LOG_TARGET_CONSOLE);
909 }
a5dab5ce 910
f170852a
LP		 911 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
912 goto finish;
60918275 913
f170852a
LP		 914 /* Mount /proc, /sys and friends, so that /proc/cmdline and
915 * /proc/$PID/fd is available. */
ca326f6f 916 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS"))
8efe3c01
LP		 917 if (mount_setup() < 0)
918 goto finish;
4ade7963
LP		 919
920 /* Reset all signal handlers. */
921 assert_se(reset_all_signal_handlers() == 0);
922
078e4539 923 /* If we are init, we can block sigkill. Yay. */
9a34ec5f 924 ignore_signals(SIGNALS_IGNORE, -1);
078e4539 925
487393e9
LP		 926 if (parse_config_file() < 0)
927 goto finish;
928
fa0f4d8a 929 if (arg_running_as == MANAGER_SYSTEM)
a5dab5ce
LP		 930 if (parse_proc_cmdline() < 0)
931 goto finish;
f170852a
LP		 932
933 log_parse_environment();
934
935 if (parse_argv(argc, argv) < 0)
936 goto finish;
937
fa0f4d8a 938 if (arg_action == ACTION_HELP) {
f170852a
LP		 939 retval = help();
940 goto finish;
fa0f4d8a 941 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
e537352b 942 unit_dump_config_items(stdout);
22f4096c 943 retval = EXIT_SUCCESS;
e537352b 944 goto finish;
fa0f4d8a 945 } else if (arg_action == ACTION_DONE) {
22f4096c 946 retval = EXIT_SUCCESS;
4288f619 947 goto finish;
f170852a
LP		 948 }
949
fa0f4d8a 950 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
f170852a 951
a16e1123
LP		 952 /* Remember open file descriptors for later deserialization */
953 if (serialization) {
954 if ((r = fdset_new_fill(&fds)) < 0) {
955 log_error("Failed to allocate fd set: %s", strerror(-r));
956 goto finish;
957 }
958
959 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
960 } else
961 close_all_fds(NULL, 0);
962
09082a94 963 /* Set up PATH unless it is already set */
e537352b
LP		 964 setenv("PATH",
965 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
fa0f4d8a 966 arg_running_as == MANAGER_SYSTEM);
09082a94 967
1104f3c1
LP		 968 /* Unset some environment variables passed in from the kernel
969 * that don't really make sense for us. */
39439087
LP		 970 if (arg_running_as == MANAGER_SYSTEM) {
971 unsetenv("HOME");
972 unsetenv("TERM");
973 }
1104f3c1 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
b9080b03
FF		 1130 case MANAGER_REBOOT:
1131 case MANAGER_POWEROFF:
1132 case MANAGER_HALT:
1133 case MANAGER_KEXEC: {
1134 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1135 [MANAGER_REBOOT] = "reboot",
1136 [MANAGER_POWEROFF] = "poweroff",
1137 [MANAGER_HALT] = "halt",
1138 [MANAGER_KEXEC] = "kexec"
1139 };
1140
1141 assert_se(shutdown_verb = table[m->exit_code]);
1142
1143 log_notice("Shutting down.");
1144 goto finish;
1145 }
1146
a16e1123
LP		 1147 default:
1148 assert_not_reached("Unknown exit code.");
1149 }
1150 }
f170852a 1151
60918275
LP		 1152finish:
1153 if (m)
1154 manager_free(m);
1155
fa0f4d8a 1156 free(arg_default_unit);
b2bb3dbe 1157 free(arg_console);
b9cd2ec1 1158
ea430986
LP		 1159 dbus_shutdown();
1160
b2bb3dbe
LP		 1161 label_finish();
1162
a16e1123 1163 if (reexecute) {
6e98720f 1164 const char *args[15];
a16e1123
LP		 1165 unsigned i = 0;
1166 char sfd[16];
1167
1168 assert(serialization);
1169 assert(fds);
1170
1171 args[i++] = SYSTEMD_BINARY_PATH;
1172
1173 args[i++] = "--log-level";
1174 args[i++] = log_level_to_string(log_get_max_level());
1175
1176 args[i++] = "--log-target";
1177 args[i++] = log_target_to_string(log_get_target());
1178
edb9aaa8
LP		 1179 if (arg_running_as == MANAGER_SYSTEM)
1180 args[i++] = "--system";
1181 else
1182 args[i++] = "--session";
1183
1184 if (arg_dump_core)
1185 args[i++] = "--dump-core";
1186
1187 if (arg_crash_shell)
1188 args[i++] = "--crash-shell";
1189
1190 if (arg_confirm_spawn)
1191 args[i++] = "--confirm-spawn";
1192
1193 if (arg_show_status)
6e98720f
LP		 1194 args[i++] = "--show-status=1";
1195 else
1196 args[i++] = "--show-status=0";
1197
07459bb6 1198#ifdef HAVE_SYSV_COMPAT
6e98720f
LP		 1199 if (arg_sysv_console)
1200 args[i++] = "--sysv-console=1";
1201 else
1202 args[i++] = "--sysv-console=0";
07459bb6 1203#endif
a16e1123
LP		 1204
1205 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1206 char_array_0(sfd);
1207
1208 args[i++] = "--deserialize";
1209 args[i++] = sfd;
1210
a16e1123
LP		 1211 args[i++] = NULL;
1212
1213 assert(i <= ELEMENTSOF(args));
1214
1215 execv(args[0], (char* const*) args);
1216
1217 log_error("Failed to reexecute: %m");
1218 }
1219
1220 if (serialization)
1221 fclose(serialization);
1222
1223 if (fds)
1224 fdset_free(fds);
1225
b9080b03
FF		 1226 if (shutdown_verb) {
1227 const char * command_line[] = {
1228 SYSTEMD_SHUTDOWN_BINARY_PATH,
1229 shutdown_verb,
1230 NULL
1231 };
1232
1233 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1234 log_error("Failed to execute shutdown binary, freezing: %m");
1235 }
1236
c3b3c274
LP		 1237 if (getpid() == 1)
1238 freeze();
1239
60918275
LP		 1240 return retval;
1241}
Unnamed repository; edit this file 'description' to name the repository.