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