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