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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"
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;
4fc935ca 69
a16e1123 70static FILE* serialization = NULL;
80876c20 71
93a46b0b 72_noreturn_ static void freeze(void) {
97c4f35c
LP		 73 for (;;)
74 pause();
75}
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 {
e364ad06 121 int status;
4fc935ca
LP		 122
123 /* Order things nicely. */
e364ad06 124 if (waitpid(pid, &status, 0) < 0)
582a507f 125 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(errno));
4fc935ca 126 else if (!WCOREDUMP(status))
582a507f 127 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
4fc935ca 128 else
582a507f 129 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
97c4f35c
LP		 130 }
131 }
132
fa0f4d8a
LP		 133 if (arg_crash_chvt)
134 chvt(arg_crash_chvt);
601f6a1e 135
fa0f4d8a 136 if (arg_crash_shell) {
6f5e3f35
LP		 137 struct sigaction sa;
138 pid_t pid;
8c43883a 139
4fc935ca
LP		 140 log_info("Executing crash shell in 10s...");
141 sleep(10);
142
6f5e3f35
LP		 143 /* Let the kernel reap children for us */
144 zero(sa);
145 sa.sa_handler = SIG_IGN;
146 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
147 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
8c43883a 148
6f5e3f35
LP		 149 if ((pid = fork()) < 0)
150 log_error("Failed to fork off crash shell: %s", strerror(errno));
151 else if (pid == 0) {
843d2643 152 int fd, r;
ea5652c2 153
21de3988 154 if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
ea5652c2 155 log_error("Failed to acquire terminal: %s", strerror(-fd));
5b2a0903 156 else if ((r = make_stdio(fd)) < 0)
843d2643 157 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
ea5652c2 158
6f5e3f35
LP		 159 execl("/bin/sh", "/bin/sh", NULL);
160
161 log_error("execl() failed: %s", strerror(errno));
162 _exit(1);
163 }
c99b188e 164
bb00e604 165 log_info("Successfully spawned crash shall as pid %lu.", (unsigned long) pid);
4fc935ca
LP		 166 }
167
168 log_info("Freezing execution.");
97c4f35c
LP		 169 freeze();
170}
171
172static void install_crash_handler(void) {
173 struct sigaction sa;
174
175 zero(sa);
176
177 sa.sa_handler = crash;
178 sa.sa_flags = SA_NODEFER;
179
1b91d3e8 180 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
97c4f35c 181}
f170852a 182
843d2643
LP		 183static int make_null_stdio(void) {
184 int null_fd, r;
80876c20 185
c8513d54 186 if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) {
80876c20 187 log_error("Failed to open /dev/null: %m");
843d2643 188 return -errno;
80876c20
LP		 189 }
190
843d2643
LP		 191 if ((r = make_stdio(null_fd)) < 0)
192 log_warning("Failed to dup2() device: %s", strerror(-r));
80876c20 193
843d2643
LP		 194 return r;
195}
80876c20 196
843d2643
LP		 197static int console_setup(bool do_reset) {
198 int tty_fd, r;
80876c20 199
843d2643
LP		 200 /* If we are init, we connect stdin/stdout/stderr to /dev/null
201 * and make sure we don't have a controlling tty. */
80876c20 202
843d2643
LP		 203 release_terminal();
204
205 if (!do_reset)
206 return 0;
80876c20 207
843d2643
LP		 208 if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
209 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
210 return -tty_fd;
211 }
80876c20 212
843d2643
LP		 213 if ((r = reset_terminal(tty_fd)) < 0)
214 log_error("Failed to reset /dev/console: %s", strerror(-r));
215
216 close_nointr_nofail(tty_fd);
80876c20
LP		 217 return r;
218}
219
f170852a
LP		 220static int set_default_unit(const char *u) {
221 char *c;
222
223 assert(u);
224
225 if (!(c = strdup(u)))
226 return -ENOMEM;
227
fa0f4d8a
LP		 228 free(arg_default_unit);
229 arg_default_unit = c;
f170852a
LP		 230 return 0;
231}
232
233static int parse_proc_cmdline_word(const char *word) {
234
235 static const char * const rlmap[] = {
514f4ef5
LP		 236 "single", SPECIAL_RESCUE_TARGET,
237 "-s", SPECIAL_RESCUE_TARGET,
238 "s", SPECIAL_RESCUE_TARGET,
239 "S", SPECIAL_RESCUE_TARGET,
240 "1", SPECIAL_RESCUE_TARGET,
f170852a
LP		 241 "2", SPECIAL_RUNLEVEL2_TARGET,
242 "3", SPECIAL_RUNLEVEL3_TARGET,
243 "4", SPECIAL_RUNLEVEL4_TARGET,
244 "5", SPECIAL_RUNLEVEL5_TARGET
245 };
246
5192bd19
LP		 247 assert(word);
248
2f198e2f
LP		 249 if (startswith(word, "systemd.unit="))
250 return set_default_unit(word + 13);
f170852a
LP		 251
252 else if (startswith(word, "systemd.log_target=")) {
253
254 if (log_set_target_from_string(word + 19) < 0)
255 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
256
257 } else if (startswith(word, "systemd.log_level=")) {
258
259 if (log_set_max_level_from_string(word + 18) < 0)
260 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
261
bbe63281
LP		 262 } else if (startswith(word, "systemd.log_color=")) {
263
264 if (log_show_color_from_string(word + 18) < 0)
265 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
266
267 } else if (startswith(word, "systemd.log_location=")) {
268
269 if (log_show_location_from_string(word + 21) < 0)
270 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
271
4fc935ca
LP		 272 } else if (startswith(word, "systemd.dump_core=")) {
273 int r;
274
275 if ((r = parse_boolean(word + 18)) < 0)
601f6a1e 276 log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
4fc935ca 277 else
fa0f4d8a 278 arg_dump_core = r;
4fc935ca
LP		 279
280 } else if (startswith(word, "systemd.crash_shell=")) {
281 int r;
282
283 if ((r = parse_boolean(word + 20)) < 0)
601f6a1e 284 log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
4fc935ca 285 else
fa0f4d8a 286 arg_crash_shell = r;
5e7ee61c
LP		 287
288 } else if (startswith(word, "systemd.confirm_spawn=")) {
289 int r;
290
291 if ((r = parse_boolean(word + 22)) < 0)
292 log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
293 else
fa0f4d8a 294 arg_confirm_spawn = r;
5e7ee61c 295
601f6a1e
LP		 296 } else if (startswith(word, "systemd.crash_chvt=")) {
297 int k;
298
299 if (safe_atoi(word + 19, &k) < 0)
300 log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
301 else
fa0f4d8a 302 arg_crash_chvt = k;
601f6a1e 303
9e58ff9c
LP		 304 } else if (startswith(word, "systemd.show_status=")) {
305 int r;
306
307 if ((r = parse_boolean(word + 20)) < 0)
308 log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
6e98720f 309 else
9e58ff9c 310 arg_show_status = r;
6e98720f
LP		 311
312 } else if (startswith(word, "systemd.sysv_console=")) {
313 int r;
314
315 if ((r = parse_boolean(word + 21)) < 0)
316 log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
317 else
318 arg_sysv_console = r;
9e58ff9c 319
4fc935ca
LP		 320 } else if (startswith(word, "systemd.")) {
321
322 log_warning("Unknown kernel switch %s. Ignoring.", word);
323
bbe63281
LP		 324 log_info("Supported kernel switches:\n"
325 "systemd.unit=UNIT Default unit to start\n"
bbe63281 326 "systemd.dump_core=0|1 Dump core on crash\n"
9e58ff9c 327 "systemd.crash_shell=0|1 Run shell on crash\n"
bbe63281 328 "systemd.crash_chvt=N Change to VT #N on crash\n"
9e58ff9c 329 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
6e98720f
LP		 330 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
331 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
332 "systemd.log_target=console|kmsg|syslog|syslog-org-kmsg|null\n"
333 " Log target\n"
334 "systemd.log_level=LEVEL Log level\n"
335 "systemd.log_color=0|1 Highlight important log messages\n"
336 "systemd.log_location=0|1 Include code location in log messages\n");
4fc935ca 337
a9c501a5 338 } else if (streq(word, "quiet")) {
6e98720f
LP		 339 arg_show_status = false;
340 arg_sysv_console = false;
9e58ff9c 341 } else {
f170852a
LP		 342 unsigned i;
343
344 /* SysV compatibility */
f170852a
LP		 345 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
346 if (streq(word, rlmap[i]))
347 return set_default_unit(rlmap[i+1]);
348 }
349
350 return 0;
351}
352
487393e9
LP		 353static int config_parse_level(
354 const char *filename,
355 unsigned line,
356 const char *section,
357 const char *lvalue,
358 const char *rvalue,
359 void *data,
360 void *userdata) {
361
362 assert(filename);
363 assert(lvalue);
364 assert(rvalue);
365
366 log_set_max_level_from_string(rvalue);
367 return 0;
368}
369
370static int config_parse_target(
371 const char *filename,
372 unsigned line,
373 const char *section,
374 const char *lvalue,
375 const char *rvalue,
376 void *data,
377 void *userdata) {
378
379 assert(filename);
380 assert(lvalue);
381 assert(rvalue);
382
383 log_set_target_from_string(rvalue);
384 return 0;
385}
386
387static int config_parse_color(
388 const char *filename,
389 unsigned line,
390 const char *section,
391 const char *lvalue,
392 const char *rvalue,
393 void *data,
394 void *userdata) {
395
396 assert(filename);
397 assert(lvalue);
398 assert(rvalue);
399
400 log_show_color_from_string(rvalue);
401 return 0;
402}
403
404static int config_parse_location(
405 const char *filename,
406 unsigned line,
407 const char *section,
408 const char *lvalue,
409 const char *rvalue,
410 void *data,
411 void *userdata) {
412
413 assert(filename);
414 assert(lvalue);
415 assert(rvalue);
416
417 log_show_location_from_string(rvalue);
418 return 0;
419}
420
421static int config_parse_cpu_affinity(
422 const char *filename,
423 unsigned line,
424 const char *section,
425 const char *lvalue,
426 const char *rvalue,
427 void *data,
428 void *userdata) {
429
430 char *w;
431 size_t l;
432 char *state;
433 cpu_set_t *c = NULL;
434 unsigned ncpus = 0;
435
436 assert(filename);
437 assert(lvalue);
438 assert(rvalue);
439
f60f22df 440 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
487393e9
LP		 441 char *t;
442 int r;
443 unsigned cpu;
444
445 if (!(t = strndup(w, l)))
446 return -ENOMEM;
447
448 r = safe_atou(t, &cpu);
449 free(t);
450
451 if (!c)
452 if (!(c = cpu_set_malloc(&ncpus)))
453 return -ENOMEM;
454
455 if (r < 0 || cpu >= ncpus) {
456 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
457 CPU_FREE(c);
458 return -EBADMSG;
459 }
460
461 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
462 }
463
464 if (c) {
465 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
466 log_warning("Failed to set CPU affinity: %m");
467
468 CPU_FREE(c);
469 }
470
471 return 0;
472}
473
474static int parse_config_file(void) {
475
476 const ConfigItem items[] = {
d3689161
LP		 477 { "LogLevel", config_parse_level, NULL, "Manager" },
478 { "LogTarget", config_parse_target, NULL, "Manager" },
479 { "LogColor", config_parse_color, NULL, "Manager" },
480 { "LogLocation", config_parse_location, NULL, "Manager" },
481 { "DumpCore", config_parse_bool, &arg_dump_core, "Manager" },
482 { "CrashShell", config_parse_bool, &arg_crash_shell, "Manager" },
483 { "ShowStatus", config_parse_bool, &arg_show_status, "Manager" },
484 { "SysVConsole", config_parse_bool, &arg_sysv_console, "Manager" },
485 { "CrashChVT", config_parse_int, &arg_crash_chvt, "Manager" },
486 { "CPUAffinity", config_parse_cpu_affinity, NULL, "Manager" },
d3689161 487 { "MountAuto", config_parse_bool, &arg_mount_auto, "Manager" },
173a8d04 488 { "SwapAuto", config_parse_bool, &arg_swap_auto, "Manager" },
487393e9
LP		 489 { NULL, NULL, NULL, NULL }
490 };
491
492 static const char * const sections[] = {
493 "Manager",
494 NULL
495 };
496
497 FILE *f;
498 const char *fn;
499 int r;
500
501 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : SESSION_CONFIG_FILE;
502
503 if (!(f = fopen(fn, "re"))) {
504 if (errno == ENOENT)
505 return 0;
506
507 log_warning("Failed to open configuration file '%s': %m", fn);
508 return 0;
509 }
510
511 if ((r = config_parse(fn, f, sections, items, false, NULL)) < 0)
512 log_warning("Failed to parse configuration file: %s", strerror(-r));
513
514 fclose(f);
515
516 return 0;
517}
518
f170852a
LP		 519static int parse_proc_cmdline(void) {
520 char *line;
521 int r;
522 char *w;
523 size_t l;
524 char *state;
525
526 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
e364ad06 527 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
f170852a
LP		 528 return 0;
529 }
530
531 FOREACH_WORD_QUOTED(w, l, line, state) {
532 char *word;
533
534 if (!(word = strndup(w, l))) {
535 r = -ENOMEM;
536 goto finish;
537 }
538
539 r = parse_proc_cmdline_word(word);
540 free(word);
541
542 if (r < 0)
543 goto finish;
544 }
545
546 r = 0;
547
548finish:
549 free(line);
550 return r;
551}
552
553static int parse_argv(int argc, char *argv[]) {
554
555 enum {
556 ARG_LOG_LEVEL = 0x100,
557 ARG_LOG_TARGET,
bbe63281
LP		 558 ARG_LOG_COLOR,
559 ARG_LOG_LOCATION,
2f198e2f 560 ARG_UNIT,
edb9aaa8
LP		 561 ARG_SYSTEM,
562 ARG_SESSION,
e537352b 563 ARG_TEST,
80876c20 564 ARG_DUMP_CONFIGURATION_ITEMS,
9e58ff9c
LP		 565 ARG_DUMP_CORE,
566 ARG_CRASH_SHELL,
a16e1123 567 ARG_CONFIRM_SPAWN,
9e58ff9c 568 ARG_SHOW_STATUS,
6e98720f 569 ARG_SYSV_CONSOLE,
4288f619
LP		 570 ARG_DESERIALIZE,
571 ARG_INTROSPECT
f170852a
LP		 572 };
573
574 static const struct option options[] = {
a16e1123
LP		 575 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
576 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
bbe63281
LP		 577 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
578 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
2f198e2f 579 { "unit", required_argument, NULL, ARG_UNIT },
edb9aaa8
LP		 580 { "system", no_argument, NULL, ARG_SYSTEM },
581 { "session", no_argument, NULL, ARG_SESSION },
a16e1123
LP		 582 { "test", no_argument, NULL, ARG_TEST },
583 { "help", no_argument, NULL, 'h' },
584 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
9e58ff9c
LP		 585 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
586 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
a16e1123 587 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
6e98720f
LP		 588 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
589 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
a16e1123 590 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
4288f619 591 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
a16e1123 592 { NULL, 0, NULL, 0 }
f170852a
LP		 593 };
594
595 int c, r;
596
597 assert(argc >= 1);
598 assert(argv);
599
1d2e23ab 600 while ((c = getopt_long(argc, argv, "hD", options, NULL)) >= 0)
f170852a
LP		 601
602 switch (c) {
603
604 case ARG_LOG_LEVEL:
605 if ((r = log_set_max_level_from_string(optarg)) < 0) {
606 log_error("Failed to parse log level %s.", optarg);
607 return r;
608 }
609
610 break;
611
612 case ARG_LOG_TARGET:
613
614 if ((r = log_set_target_from_string(optarg)) < 0) {
615 log_error("Failed to parse log target %s.", optarg);
616 return r;
617 }
618
619 break;
620
bbe63281
LP		 621 case ARG_LOG_COLOR:
622
d0b170c8
LP		 623 if (optarg) {
624 if ((r = log_show_color_from_string(optarg)) < 0) {
625 log_error("Failed to parse log color setting %s.", optarg);
626 return r;
627 }
628 } else
629 log_show_color(true);
bbe63281
LP		 630
631 break;
632
633 case ARG_LOG_LOCATION:
634
d0b170c8
LP		 635 if (optarg) {
636 if ((r = log_show_location_from_string(optarg)) < 0) {
637 log_error("Failed to parse log location setting %s.", optarg);
638 return r;
639 }
640 } else
641 log_show_location(true);
bbe63281
LP		 642
643 break;
644
2f198e2f 645 case ARG_UNIT:
f170852a
LP		 646
647 if ((r = set_default_unit(optarg)) < 0) {
648 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
649 return r;
650 }
651
652 break;
653
edb9aaa8
LP		 654 case ARG_SYSTEM:
655 arg_running_as = MANAGER_SYSTEM;
656 break;
a5dab5ce 657
edb9aaa8
LP		 658 case ARG_SESSION:
659 arg_running_as = MANAGER_SESSION;
a5dab5ce 660 break;
a5dab5ce 661
e965d56d 662 case ARG_TEST:
fa0f4d8a 663 arg_action = ACTION_TEST;
e965d56d
LP		 664 break;
665
e537352b 666 case ARG_DUMP_CONFIGURATION_ITEMS:
fa0f4d8a 667 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
e537352b
LP		 668 break;
669
9e58ff9c
LP		 670 case ARG_DUMP_CORE:
671 arg_dump_core = true;
672 break;
673
674 case ARG_CRASH_SHELL:
675 arg_crash_shell = true;
676 break;
677
80876c20 678 case ARG_CONFIRM_SPAWN:
fa0f4d8a 679 arg_confirm_spawn = true;
80876c20
LP		 680 break;
681
9e58ff9c 682 case ARG_SHOW_STATUS:
6e98720f
LP		 683
684 if (optarg) {
685 if ((r = parse_boolean(optarg)) < 0) {
686 log_error("Failed to show status boolean %s.", optarg);
687 return r;
688 }
689 arg_show_status = r;
690 } else
691 arg_show_status = true;
692 break;
693
694 case ARG_SYSV_CONSOLE:
695
696 if (optarg) {
697 if ((r = parse_boolean(optarg)) < 0) {
698 log_error("Failed to SysV console boolean %s.", optarg);
699 return r;
700 }
701 arg_sysv_console = r;
702 } else
703 arg_sysv_console = true;
9e58ff9c
LP		 704 break;
705
a16e1123
LP		 706 case ARG_DESERIALIZE: {
707 int fd;
708 FILE *f;
709
710 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
711 log_error("Failed to parse deserialize option %s.", optarg);
712 return r;
713 }
714
715 if (!(f = fdopen(fd, "r"))) {
716 log_error("Failed to open serialization fd: %m");
717 return r;
718 }
719
720 if (serialization)
721 fclose(serialization);
722
723 serialization = f;
724
725 break;
726 }
727
4288f619
LP		 728 case ARG_INTROSPECT: {
729 const char * const * i = NULL;
730
731 for (i = bus_interface_table; *i; i += 2)
732 if (!optarg || streq(i[0], optarg)) {
733 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
734 "<node>\n", stdout);
735 fputs(i[1], stdout);
736 fputs("</node>\n", stdout);
737
738 if (optarg)
739 break;
740 }
741
742 if (!i[0] && optarg)
743 log_error("Unknown interface %s.", optarg);
744
fa0f4d8a 745 arg_action = ACTION_DONE;
4288f619
LP		 746 break;
747 }
748
f170852a 749 case 'h':
fa0f4d8a 750 arg_action = ACTION_HELP;
f170852a
LP		 751 break;
752
1d2e23ab
LP		 753 case 'D':
754 log_set_max_level(LOG_DEBUG);
755 break;
756
f170852a
LP		 757 case '?':
758 return -EINVAL;
759
760 default:
761 log_error("Unknown option code %c", c);
762 return -EINVAL;
763 }
764
51f0e189
LP		 765 /* PID 1 will get the kernel arguments as parameters, which we
766 * ignore and unconditionally read from
767 * /proc/cmdline. However, we need to ignore those arguments
768 * here. */
fa0f4d8a 769 if (arg_running_as != MANAGER_SYSTEM && optind < argc) {
51f0e189
LP		 770 log_error("Excess arguments.");
771 return -EINVAL;
772 }
773
f170852a
LP		 774 return 0;
775}
776
777static int help(void) {
778
2e33c433 779 printf("%s [OPTIONS...]\n\n"
bbe63281 780 "Starts up and maintains the system or a session.\n\n"
e537352b 781 " -h --help Show this help\n"
e537352b 782 " --test Determine startup sequence, dump it and exit\n"
80876c20 783 " --dump-configuration-items Dump understood unit configuration items\n"
bbe63281 784 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
9e58ff9c 785 " --unit=UNIT Set default unit\n"
edb9aaa8
LP		 786 " --system Run a system instance, even if PID != 1\n"
787 " --session Run a session instance\n"
9e58ff9c
LP		 788 " --dump-core Dump core on crash\n"
789 " --crash-shell Run shell on crash\n"
790 " --confirm-spawn Ask for confirmation when spawning processes\n"
6e98720f
LP		 791 " --show-status[=0|1] Show status updates on the console during bootup\n"
792 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
bbe63281 793 " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
9e58ff9c 794 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
2218198b 795 " --log-color[=0|1] Highlight important log messages\n"
bbe63281 796 " --log-location[=0|1] Include code location in log messages\n",
5b6319dc 797 program_invocation_short_name);
f170852a
LP		 798
799 return 0;
800}
801
a16e1123
LP		 802static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
803 FILE *f = NULL;
804 FDSet *fds = NULL;
805 int r;
806
807 assert(m);
808 assert(_f);
809 assert(_fds);
810
d8d5ab98 811 if ((r = manager_open_serialization(m, &f)) < 0) {
a16e1123
LP		 812 log_error("Failed to create serialization faile: %s", strerror(-r));
813 goto fail;
814 }
815
816 if (!(fds = fdset_new())) {
817 r = -ENOMEM;
818 log_error("Failed to allocate fd set: %s", strerror(-r));
819 goto fail;
820 }
821
822 if ((r = manager_serialize(m, f, fds)) < 0) {
823 log_error("Failed to serialize state: %s", strerror(-r));
824 goto fail;
825 }
826
827 if (fseeko(f, 0, SEEK_SET) < 0) {
828 log_error("Failed to rewind serialization fd: %m");
829 goto fail;
830 }
831
832 if ((r = fd_cloexec(fileno(f), false)) < 0) {
833 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
834 goto fail;
835 }
836
837 if ((r = fdset_cloexec(fds, false)) < 0) {
838 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
839 goto fail;
840 }
841
842 *_f = f;
843 *_fds = fds;
844
845 return 0;
846
847fail:
848 fdset_free(fds);
849
850 if (f)
851 fclose(f);
852
853 return r;
854}
855
60918275
LP		 856int main(int argc, char *argv[]) {
857 Manager *m = NULL;
60918275 858 int r, retval = 1;
a16e1123
LP		 859 FDSet *fds = NULL;
860 bool reexecute = false;
27b14a22 861
2cb1a60d
LP		 862 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
863 /* This is compatbility support for SysV, where
864 * calling init as a user is identical to telinit. */
865
866 errno = -ENOENT;
867 execv(SYSTEMCTL_BINARY_PATH, argv);
868 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
869 return 1;
870 }
871
2cc59dbf 872 log_show_color(isatty(STDERR_FILENO) > 0);
bbe63281 873 log_show_location(false);
7c706717 874 log_set_max_level(LOG_INFO);
bbe63281 875
843d2643 876 if (getpid() == 1) {
fa0f4d8a 877 arg_running_as = MANAGER_SYSTEM;
843d2643 878 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
0ff4cdd9
LP		 879
880 if (label_init() < 0)
881 goto finish;
bbe63281 882 } else {
fa0f4d8a 883 arg_running_as = MANAGER_SESSION;
bbe63281
LP		 884 log_set_target(LOG_TARGET_CONSOLE);
885 }
a5dab5ce 886
f170852a
LP		 887 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
888 goto finish;
60918275 889
f170852a
LP		 890 /* Mount /proc, /sys and friends, so that /proc/cmdline and
891 * /proc/$PID/fd is available. */
ca326f6f 892 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS"))
8efe3c01
LP		 893 if (mount_setup() < 0)
894 goto finish;
4ade7963
LP		 895
896 /* Reset all signal handlers. */
897 assert_se(reset_all_signal_handlers() == 0);
898
078e4539 899 /* If we are init, we can block sigkill. Yay. */
9a34ec5f 900 ignore_signals(SIGNALS_IGNORE, -1);
078e4539 901
487393e9
LP		 902 if (parse_config_file() < 0)
903 goto finish;
904
fa0f4d8a 905 if (arg_running_as == MANAGER_SYSTEM)
a5dab5ce
LP		 906 if (parse_proc_cmdline() < 0)
907 goto finish;
f170852a
LP		 908
909 log_parse_environment();
910
911 if (parse_argv(argc, argv) < 0)
912 goto finish;
913
fa0f4d8a 914 if (arg_action == ACTION_HELP) {
f170852a
LP		 915 retval = help();
916 goto finish;
fa0f4d8a 917 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
e537352b
LP		 918 unit_dump_config_items(stdout);
919 retval = 0;
920 goto finish;
fa0f4d8a 921 } else if (arg_action == ACTION_DONE) {
4288f619
LP		 922 retval = 0;
923 goto finish;
f170852a
LP		 924 }
925
fa0f4d8a 926 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
f170852a 927
a16e1123
LP		 928 /* Remember open file descriptors for later deserialization */
929 if (serialization) {
930 if ((r = fdset_new_fill(&fds)) < 0) {
931 log_error("Failed to allocate fd set: %s", strerror(-r));
932 goto finish;
933 }
934
935 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
936 } else
937 close_all_fds(NULL, 0);
938
09082a94 939 /* Set up PATH unless it is already set */
e537352b
LP		 940 setenv("PATH",
941 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
fa0f4d8a 942 arg_running_as == MANAGER_SYSTEM);
09082a94 943
f170852a
LP		 944 /* Move out of the way, so that we won't block unmounts */
945 assert_se(chdir("/") == 0);
946
fa0f4d8a 947 if (arg_running_as == MANAGER_SYSTEM) {
80876c20
LP		 948 /* Become a session leader if we aren't one yet. */
949 setsid();
4ade7963 950
80876c20
LP		 951 /* Disable the umask logic */
952 umask(0);
953 }
954
843d2643
LP		 955 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
956 dbus_connection_set_change_sigpipe(FALSE);
957
2146621b
LP		 958 /* Reset the console, but only if this is really init and we
959 * are freshly booted */
fa0f4d8a 960 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
2146621b 961 console_setup(getpid() == 1 && !serialization);
843d2643
LP		 962 make_null_stdio();
963 }
4ade7963 964
18149b9f 965 /* Open the logging devices, if possible and necessary */
843d2643 966 log_open();
4ade7963 967
5373d602
LP		 968 /* Make sure we leave a core dump without panicing the
969 * kernel. */
4fc935ca
LP		 970 if (getpid() == 1)
971 install_crash_handler();
97c4f35c 972
302e27c8
LP		 973 log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
974 PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES ")", manager_running_as_to_string(arg_running_as));
a5dab5ce 975
888c6216
LP		 976 if (arg_running_as == MANAGER_SYSTEM && !serialization) {
977 if (arg_show_status)
978 status_welcome();
979
888c6216
LP		 980 kmod_setup();
981 hostname_setup();
982 loopback_setup();
af5bc85d 983 }
302e8c4c 984
9e58ff9c 985 if ((r = manager_new(arg_running_as, &m)) < 0) {
8e274523 986 log_error("Failed to allocate manager object: %s", strerror(-r));
60918275
LP		 987 goto finish;
988 }
989
9e58ff9c
LP		 990 m->confirm_spawn = arg_confirm_spawn;
991 m->show_status = arg_show_status;
6e98720f 992 m->sysv_console = arg_sysv_console;
d3689161 993 m->mount_auto = arg_mount_auto;
173a8d04 994 m->swap_auto = arg_swap_auto;
9e58ff9c 995
a16e1123 996 if ((r = manager_startup(m, serialization, fds)) < 0)
6e2ef85b 997 log_error("Failed to fully start up daemon: %s", strerror(-r));
a16e1123
LP		 998
999 if (fds) {
1000 /* This will close all file descriptors that were opened, but
1001 * not claimed by any unit. */
1002
1003 fdset_free(fds);
1004 fds = NULL;
f50e0a01
LP		 1005 }
1006
a16e1123
LP		 1007 if (serialization) {
1008 fclose(serialization);
1009 serialization = NULL;
1010 } else {
398ef8ba 1011 DBusError error;
1c27d3f3 1012 Unit *target = NULL;
398ef8ba
LP		 1013
1014 dbus_error_init(&error);
1015
fa0f4d8a 1016 log_debug("Activating default unit: %s", arg_default_unit);
a16e1123 1017
398ef8ba
LP		 1018 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1019 log_error("Failed to load default target: %s", bus_error(&error, r));
1020 dbus_error_free(&error);
1c27d3f3
LP		 1021 } else if (target->meta.load_state != UNIT_LOADED)
1022 log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
27b14a22 1023
1c27d3f3 1024 if (!target || target->meta.load_state != UNIT_LOADED) {
a16e1123 1025 log_info("Trying to load rescue target...");
1c27d3f3 1026
398ef8ba
LP		 1027 if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1028 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1029 dbus_error_free(&error);
a16e1123 1030 goto finish;
1c27d3f3
LP		 1031 } else if (target->meta.load_state != UNIT_LOADED) {
1032 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1033 goto finish;
a16e1123
LP		 1034 }
1035 }
37d88da7 1036
fa0f4d8a 1037 if (arg_action == ACTION_TEST) {
40d50879 1038 printf("-> By units:\n");
a16e1123
LP		 1039 manager_dump_units(m, stdout, "\t");
1040 }
1041
0ff4cdd9 1042 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
398ef8ba
LP		 1043 log_error("Failed to start default target: %s", bus_error(&error, r));
1044 dbus_error_free(&error);
37d88da7
LP		 1045 goto finish;
1046 }
60918275 1047
fa0f4d8a 1048 if (arg_action == ACTION_TEST) {
40d50879 1049 printf("-> By jobs:\n");
a16e1123
LP		 1050 manager_dump_jobs(m, stdout, "\t");
1051 retval = 0;
1052 goto finish;
1053 }
e965d56d 1054 }
d46de8a1 1055
a16e1123
LP		 1056 for (;;) {
1057 if ((r = manager_loop(m)) < 0) {
1058 log_error("Failed to run mainloop: %s", strerror(-r));
1059 goto finish;
1060 }
11dd41ce 1061
a16e1123 1062 switch (m->exit_code) {
e965d56d 1063
a16e1123
LP		 1064 case MANAGER_EXIT:
1065 retval = 0;
1066 log_debug("Exit.");
1067 goto finish;
e965d56d 1068
a16e1123 1069 case MANAGER_RELOAD:
e015090f 1070 log_info("Reloading.");
a16e1123
LP		 1071 if ((r = manager_reload(m)) < 0)
1072 log_error("Failed to reload: %s", strerror(-r));
1073 break;
cea8e32e 1074
a16e1123 1075 case MANAGER_REEXECUTE:
a16e1123
LP		 1076 if (prepare_reexecute(m, &serialization, &fds) < 0)
1077 goto finish;
60918275 1078
a16e1123 1079 reexecute = true;
e015090f 1080 log_notice("Reexecuting.");
a16e1123
LP		 1081 goto finish;
1082
1083 default:
1084 assert_not_reached("Unknown exit code.");
1085 }
1086 }
f170852a 1087
60918275
LP		 1088finish:
1089 if (m)
1090 manager_free(m);
1091
fa0f4d8a 1092 free(arg_default_unit);
b9cd2ec1 1093
ea430986
LP		 1094 dbus_shutdown();
1095
a16e1123 1096 if (reexecute) {
6e98720f 1097 const char *args[15];
a16e1123
LP		 1098 unsigned i = 0;
1099 char sfd[16];
1100
1101 assert(serialization);
1102 assert(fds);
1103
1104 args[i++] = SYSTEMD_BINARY_PATH;
1105
1106 args[i++] = "--log-level";
1107 args[i++] = log_level_to_string(log_get_max_level());
1108
1109 args[i++] = "--log-target";
1110 args[i++] = log_target_to_string(log_get_target());
1111
edb9aaa8
LP		 1112 if (arg_running_as == MANAGER_SYSTEM)
1113 args[i++] = "--system";
1114 else
1115 args[i++] = "--session";
1116
1117 if (arg_dump_core)
1118 args[i++] = "--dump-core";
1119
1120 if (arg_crash_shell)
1121 args[i++] = "--crash-shell";
1122
1123 if (arg_confirm_spawn)
1124 args[i++] = "--confirm-spawn";
1125
1126 if (arg_show_status)
6e98720f
LP		 1127 args[i++] = "--show-status=1";
1128 else
1129 args[i++] = "--show-status=0";
1130
1131 if (arg_sysv_console)
1132 args[i++] = "--sysv-console=1";
1133 else
1134 args[i++] = "--sysv-console=0";
a16e1123
LP		 1135
1136 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1137 char_array_0(sfd);
1138
1139 args[i++] = "--deserialize";
1140 args[i++] = sfd;
1141
a16e1123
LP		 1142 args[i++] = NULL;
1143
1144 assert(i <= ELEMENTSOF(args));
1145
1146 execv(args[0], (char* const*) args);
1147
1148 log_error("Failed to reexecute: %m");
1149 }
1150
1151 if (serialization)
1152 fclose(serialization);
1153
1154 if (fds)
1155 fdset_free(fds);
1156
c3b3c274
LP		 1157 if (getpid() == 1)
1158 freeze();
1159
56cf987f
DW		 1160 label_finish();
1161
60918275
LP		 1162 return retval;
1163}
Unnamed repository; edit this file 'description' to name the repository.