]>
Commit | Line | Data |
---|---|---|
60918275 LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
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" |
302e8c4c | 40 | #include "load-fragment.h" |
a16e1123 | 41 | #include "fdset.h" |
60918275 | 42 | |
f170852a LP |
43 | static enum { |
44 | ACTION_RUN, | |
e965d56d | 45 | ACTION_HELP, |
e537352b LP |
46 | ACTION_TEST, |
47 | ACTION_DUMP_CONFIGURATION_ITEMS | |
f170852a LP |
48 | } action = ACTION_RUN; |
49 | ||
50 | static char *default_unit = NULL; | |
a5dab5ce | 51 | static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID; |
4fc935ca | 52 | |
97c4f35c | 53 | static bool dump_core = true; |
601f6a1e LP |
54 | static bool crash_shell = false; |
55 | static int crash_chvt = -1; | |
80876c20 | 56 | static bool confirm_spawn = false; |
a16e1123 | 57 | static FILE* serialization = NULL; |
80876c20 | 58 | |
97c4f35c LP |
59 | _noreturn static void freeze(void) { |
60 | for (;;) | |
61 | pause(); | |
62 | } | |
63 | ||
6f5e3f35 LP |
64 | static void nop_handler(int sig) { |
65 | } | |
66 | ||
97c4f35c LP |
67 | _noreturn static void crash(int sig) { |
68 | ||
69 | if (!dump_core) | |
70 | log_error("Caught <%s>, not dumping core.", strsignal(sig)); | |
71 | else { | |
6f5e3f35 | 72 | struct sigaction sa; |
97c4f35c LP |
73 | pid_t pid; |
74 | ||
6f5e3f35 LP |
75 | /* We want to wait for the core process, hence let's enable SIGCHLD */ |
76 | zero(sa); | |
77 | sa.sa_handler = nop_handler; | |
78 | sa.sa_flags = SA_NOCLDSTOP|SA_RESTART; | |
79 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
80 | ||
97c4f35c | 81 | if ((pid = fork()) < 0) |
4fc935ca | 82 | log_error("Caught <%s>, cannot fork for core dump: %s", strsignal(sig), strerror(errno)); |
97c4f35c LP |
83 | |
84 | else if (pid == 0) { | |
97c4f35c LP |
85 | struct rlimit rl; |
86 | ||
87 | /* Enable default signal handler for core dump */ | |
88 | zero(sa); | |
89 | sa.sa_handler = SIG_DFL; | |
90 | assert_se(sigaction(sig, &sa, NULL) == 0); | |
91 | ||
92 | /* Don't limit the core dump size */ | |
93 | zero(rl); | |
94 | rl.rlim_cur = RLIM_INFINITY; | |
95 | rl.rlim_max = RLIM_INFINITY; | |
96 | setrlimit(RLIMIT_CORE, &rl); | |
97 | ||
98 | /* Just to be sure... */ | |
99 | assert_se(chdir("/") == 0); | |
100 | ||
101 | /* Raise the signal again */ | |
102 | raise(sig); | |
103 | ||
104 | assert_not_reached("We shouldn't be here..."); | |
105 | _exit(1); | |
4fc935ca LP |
106 | |
107 | } else { | |
108 | int status, r; | |
109 | ||
110 | /* Order things nicely. */ | |
111 | if ((r = waitpid(pid, &status, 0)) < 0) | |
112 | log_error("Caught <%s>, waitpid() failed: %s", strsignal(sig), strerror(errno)); | |
113 | else if (!WCOREDUMP(status)) | |
114 | log_error("Caught <%s>, core dump failed.", strsignal(sig)); | |
115 | else | |
116 | log_error("Caught <%s>, dumped core as pid %llu.", strsignal(sig), (unsigned long long) pid); | |
97c4f35c LP |
117 | } |
118 | } | |
119 | ||
601f6a1e LP |
120 | if (crash_chvt) |
121 | chvt(crash_chvt); | |
122 | ||
4fc935ca | 123 | if (crash_shell) { |
6f5e3f35 LP |
124 | struct sigaction sa; |
125 | pid_t pid; | |
8c43883a | 126 | |
4fc935ca LP |
127 | log_info("Executing crash shell in 10s..."); |
128 | sleep(10); | |
129 | ||
6f5e3f35 LP |
130 | /* Let the kernel reap children for us */ |
131 | zero(sa); | |
132 | sa.sa_handler = SIG_IGN; | |
133 | sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART; | |
134 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
8c43883a | 135 | |
6f5e3f35 LP |
136 | if ((pid = fork()) < 0) |
137 | log_error("Failed to fork off crash shell: %s", strerror(errno)); | |
138 | else if (pid == 0) { | |
843d2643 | 139 | int fd, r; |
ea5652c2 LP |
140 | |
141 | if ((fd = acquire_terminal("/dev/console", false, true)) < 0) { | |
142 | log_error("Failed to acquire terminal: %s", strerror(-fd)); | |
143 | _exit(1); | |
144 | } | |
145 | ||
843d2643 LP |
146 | if ((r = make_stdio(fd)) < 0) { |
147 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); | |
ea5652c2 LP |
148 | _exit(1); |
149 | } | |
150 | ||
6f5e3f35 LP |
151 | execl("/bin/sh", "/bin/sh", NULL); |
152 | ||
153 | log_error("execl() failed: %s", strerror(errno)); | |
154 | _exit(1); | |
155 | } | |
c99b188e | 156 | |
6f5e3f35 | 157 | log_info("Successfully spawned crash shall as pid %llu.", (unsigned long long) pid); |
4fc935ca LP |
158 | } |
159 | ||
160 | log_info("Freezing execution."); | |
97c4f35c LP |
161 | freeze(); |
162 | } | |
163 | ||
164 | static void install_crash_handler(void) { | |
165 | struct sigaction sa; | |
166 | ||
167 | zero(sa); | |
168 | ||
169 | sa.sa_handler = crash; | |
170 | sa.sa_flags = SA_NODEFER; | |
171 | ||
172 | assert_se(sigaction(SIGSEGV, &sa, NULL) == 0); | |
5373d602 LP |
173 | assert_se(sigaction(SIGILL, &sa, NULL) == 0); |
174 | assert_se(sigaction(SIGFPE, &sa, NULL) == 0); | |
175 | assert_se(sigaction(SIGBUS, &sa, NULL) == 0); | |
176 | assert_se(sigaction(SIGQUIT, &sa, NULL) == 0); | |
97c4f35c LP |
177 | assert_se(sigaction(SIGABRT, &sa, NULL) == 0); |
178 | } | |
f170852a | 179 | |
843d2643 LP |
180 | static int make_null_stdio(void) { |
181 | int null_fd, r; | |
80876c20 | 182 | |
843d2643 | 183 | if ((null_fd = open("/dev/null", O_RDWR)) < 0) { |
80876c20 | 184 | log_error("Failed to open /dev/null: %m"); |
843d2643 | 185 | return -errno; |
80876c20 LP |
186 | } |
187 | ||
843d2643 LP |
188 | if ((r = make_stdio(null_fd)) < 0) |
189 | log_warning("Failed to dup2() device: %s", strerror(-r)); | |
80876c20 | 190 | |
843d2643 LP |
191 | return r; |
192 | } | |
80876c20 | 193 | |
843d2643 LP |
194 | static int console_setup(bool do_reset) { |
195 | int tty_fd, r; | |
80876c20 | 196 | |
843d2643 LP |
197 | /* If we are init, we connect stdin/stdout/stderr to /dev/null |
198 | * and make sure we don't have a controlling tty. */ | |
80876c20 | 199 | |
843d2643 LP |
200 | release_terminal(); |
201 | ||
202 | if (!do_reset) | |
203 | return 0; | |
80876c20 | 204 | |
843d2643 LP |
205 | if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) { |
206 | log_error("Failed to open /dev/console: %s", strerror(-tty_fd)); | |
207 | return -tty_fd; | |
208 | } | |
80876c20 | 209 | |
843d2643 LP |
210 | if ((r = reset_terminal(tty_fd)) < 0) |
211 | log_error("Failed to reset /dev/console: %s", strerror(-r)); | |
212 | ||
213 | close_nointr_nofail(tty_fd); | |
80876c20 LP |
214 | return r; |
215 | } | |
216 | ||
f170852a LP |
217 | static int set_default_unit(const char *u) { |
218 | char *c; | |
219 | ||
220 | assert(u); | |
221 | ||
222 | if (!(c = strdup(u))) | |
223 | return -ENOMEM; | |
224 | ||
225 | free(default_unit); | |
226 | default_unit = c; | |
227 | return 0; | |
228 | } | |
229 | ||
230 | static int parse_proc_cmdline_word(const char *word) { | |
231 | ||
232 | static const char * const rlmap[] = { | |
233 | "single", SPECIAL_RUNLEVEL1_TARGET, | |
234 | "-s", SPECIAL_RUNLEVEL1_TARGET, | |
235 | "s", SPECIAL_RUNLEVEL1_TARGET, | |
236 | "S", SPECIAL_RUNLEVEL1_TARGET, | |
237 | "1", SPECIAL_RUNLEVEL1_TARGET, | |
238 | "2", SPECIAL_RUNLEVEL2_TARGET, | |
239 | "3", SPECIAL_RUNLEVEL3_TARGET, | |
240 | "4", SPECIAL_RUNLEVEL4_TARGET, | |
241 | "5", SPECIAL_RUNLEVEL5_TARGET | |
242 | }; | |
243 | ||
244 | if (startswith(word, "systemd.default=")) | |
82771ba1 | 245 | return set_default_unit(word + 16); |
f170852a LP |
246 | |
247 | else if (startswith(word, "systemd.log_target=")) { | |
248 | ||
249 | if (log_set_target_from_string(word + 19) < 0) | |
250 | log_warning("Failed to parse log target %s. Ignoring.", word + 19); | |
251 | ||
252 | } else if (startswith(word, "systemd.log_level=")) { | |
253 | ||
254 | if (log_set_max_level_from_string(word + 18) < 0) | |
255 | log_warning("Failed to parse log level %s. Ignoring.", word + 18); | |
256 | ||
4fc935ca LP |
257 | } else if (startswith(word, "systemd.dump_core=")) { |
258 | int r; | |
259 | ||
260 | if ((r = parse_boolean(word + 18)) < 0) | |
601f6a1e | 261 | log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18); |
4fc935ca LP |
262 | else |
263 | dump_core = r; | |
264 | ||
265 | } else if (startswith(word, "systemd.crash_shell=")) { | |
266 | int r; | |
267 | ||
268 | if ((r = parse_boolean(word + 20)) < 0) | |
601f6a1e | 269 | log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20); |
4fc935ca LP |
270 | else |
271 | crash_shell = r; | |
272 | ||
5e7ee61c LP |
273 | |
274 | } else if (startswith(word, "systemd.confirm_spawn=")) { | |
275 | int r; | |
276 | ||
277 | if ((r = parse_boolean(word + 22)) < 0) | |
278 | log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22); | |
279 | else | |
280 | confirm_spawn = r; | |
281 | ||
601f6a1e LP |
282 | } else if (startswith(word, "systemd.crash_chvt=")) { |
283 | int k; | |
284 | ||
285 | if (safe_atoi(word + 19, &k) < 0) | |
286 | log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19); | |
287 | else | |
288 | crash_chvt = k; | |
289 | ||
4fc935ca LP |
290 | } else if (startswith(word, "systemd.")) { |
291 | ||
292 | log_warning("Unknown kernel switch %s. Ignoring.", word); | |
293 | ||
294 | log_info("Supported kernel switches:"); | |
295 | log_info("systemd.default=UNIT Default unit to start"); | |
296 | log_info("systemd.log_target=console|kmsg|syslog Log target"); | |
297 | log_info("systemd.log_level=LEVEL Log level"); | |
298 | log_info("systemd.dump_core=0|1 Dump core on crash"); | |
299 | log_info("systemd.crash_shell=0|1 On crash run shell"); | |
601f6a1e | 300 | log_info("systemd.crash_chvt=N Change to VT #N on crash"); |
5e7ee61c | 301 | log_info("systemd.confirm_spawn=0|1 Confirm every process spawn"); |
4fc935ca | 302 | |
f170852a LP |
303 | } else { |
304 | unsigned i; | |
305 | ||
306 | /* SysV compatibility */ | |
f170852a LP |
307 | for (i = 0; i < ELEMENTSOF(rlmap); i += 2) |
308 | if (streq(word, rlmap[i])) | |
309 | return set_default_unit(rlmap[i+1]); | |
310 | } | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | static int parse_proc_cmdline(void) { | |
316 | char *line; | |
317 | int r; | |
318 | char *w; | |
319 | size_t l; | |
320 | char *state; | |
321 | ||
322 | if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { | |
323 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno)); | |
324 | return 0; | |
325 | } | |
326 | ||
327 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
328 | char *word; | |
329 | ||
330 | if (!(word = strndup(w, l))) { | |
331 | r = -ENOMEM; | |
332 | goto finish; | |
333 | } | |
334 | ||
335 | r = parse_proc_cmdline_word(word); | |
336 | free(word); | |
337 | ||
338 | if (r < 0) | |
339 | goto finish; | |
340 | } | |
341 | ||
342 | r = 0; | |
343 | ||
344 | finish: | |
345 | free(line); | |
346 | return r; | |
347 | } | |
348 | ||
349 | static int parse_argv(int argc, char *argv[]) { | |
350 | ||
351 | enum { | |
352 | ARG_LOG_LEVEL = 0x100, | |
353 | ARG_LOG_TARGET, | |
a5dab5ce | 354 | ARG_DEFAULT, |
e965d56d | 355 | ARG_RUNNING_AS, |
e537352b | 356 | ARG_TEST, |
80876c20 | 357 | ARG_DUMP_CONFIGURATION_ITEMS, |
a16e1123 LP |
358 | ARG_CONFIRM_SPAWN, |
359 | ARG_DESERIALIZE | |
f170852a LP |
360 | }; |
361 | ||
362 | static const struct option options[] = { | |
a16e1123 LP |
363 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, |
364 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
365 | { "default", required_argument, NULL, ARG_DEFAULT }, | |
366 | { "running-as", required_argument, NULL, ARG_RUNNING_AS }, | |
367 | { "test", no_argument, NULL, ARG_TEST }, | |
368 | { "help", no_argument, NULL, 'h' }, | |
369 | { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS }, | |
370 | { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN }, | |
371 | { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, | |
372 | { NULL, 0, NULL, 0 } | |
f170852a LP |
373 | }; |
374 | ||
375 | int c, r; | |
376 | ||
377 | assert(argc >= 1); | |
378 | assert(argv); | |
379 | ||
380 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
381 | ||
382 | switch (c) { | |
383 | ||
384 | case ARG_LOG_LEVEL: | |
385 | if ((r = log_set_max_level_from_string(optarg)) < 0) { | |
386 | log_error("Failed to parse log level %s.", optarg); | |
387 | return r; | |
388 | } | |
389 | ||
390 | break; | |
391 | ||
392 | case ARG_LOG_TARGET: | |
393 | ||
394 | if ((r = log_set_target_from_string(optarg)) < 0) { | |
395 | log_error("Failed to parse log target %s.", optarg); | |
396 | return r; | |
397 | } | |
398 | ||
399 | break; | |
400 | ||
401 | case ARG_DEFAULT: | |
402 | ||
403 | if ((r = set_default_unit(optarg)) < 0) { | |
404 | log_error("Failed to set default unit %s: %s", optarg, strerror(-r)); | |
405 | return r; | |
406 | } | |
407 | ||
408 | break; | |
409 | ||
a5dab5ce LP |
410 | case ARG_RUNNING_AS: { |
411 | ManagerRunningAs as; | |
412 | ||
413 | if ((as = manager_running_as_from_string(optarg)) < 0) { | |
414 | log_error("Failed to parse running as value %s", optarg); | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
418 | running_as = as; | |
419 | break; | |
420 | } | |
421 | ||
e965d56d LP |
422 | case ARG_TEST: |
423 | action = ACTION_TEST; | |
424 | break; | |
425 | ||
e537352b LP |
426 | case ARG_DUMP_CONFIGURATION_ITEMS: |
427 | action = ACTION_DUMP_CONFIGURATION_ITEMS; | |
428 | break; | |
429 | ||
80876c20 LP |
430 | case ARG_CONFIRM_SPAWN: |
431 | confirm_spawn = true; | |
432 | break; | |
433 | ||
a16e1123 LP |
434 | case ARG_DESERIALIZE: { |
435 | int fd; | |
436 | FILE *f; | |
437 | ||
438 | if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) { | |
439 | log_error("Failed to parse deserialize option %s.", optarg); | |
440 | return r; | |
441 | } | |
442 | ||
443 | if (!(f = fdopen(fd, "r"))) { | |
444 | log_error("Failed to open serialization fd: %m"); | |
445 | return r; | |
446 | } | |
447 | ||
448 | if (serialization) | |
449 | fclose(serialization); | |
450 | ||
451 | serialization = f; | |
452 | ||
453 | break; | |
454 | } | |
455 | ||
f170852a LP |
456 | case 'h': |
457 | action = ACTION_HELP; | |
458 | break; | |
459 | ||
460 | case '?': | |
461 | return -EINVAL; | |
462 | ||
463 | default: | |
464 | log_error("Unknown option code %c", c); | |
465 | return -EINVAL; | |
466 | } | |
467 | ||
51f0e189 LP |
468 | /* PID 1 will get the kernel arguments as parameters, which we |
469 | * ignore and unconditionally read from | |
470 | * /proc/cmdline. However, we need to ignore those arguments | |
471 | * here. */ | |
472 | if (running_as != MANAGER_INIT && optind < argc) { | |
473 | log_error("Excess arguments."); | |
474 | return -EINVAL; | |
475 | } | |
476 | ||
f170852a LP |
477 | return 0; |
478 | } | |
479 | ||
480 | static int help(void) { | |
481 | ||
482 | printf("%s [options]\n\n" | |
e537352b LP |
483 | " -h --help Show this help\n" |
484 | " --default=UNIT Set default unit\n" | |
485 | " --log-level=LEVEL Set log level\n" | |
843d2643 | 486 | " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg)\n" |
e537352b LP |
487 | " --running-as=AS Set running as (init, system, session)\n" |
488 | " --test Determine startup sequence, dump it and exit\n" | |
80876c20 LP |
489 | " --dump-configuration-items Dump understood unit configuration items\n" |
490 | " --confirm-spawn Ask for confirmation when spawning processes\n", | |
f170852a LP |
491 | __progname); |
492 | ||
493 | return 0; | |
494 | } | |
495 | ||
a16e1123 LP |
496 | static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { |
497 | FILE *f = NULL; | |
498 | FDSet *fds = NULL; | |
499 | int r; | |
500 | ||
501 | assert(m); | |
502 | assert(_f); | |
503 | assert(_fds); | |
504 | ||
505 | if ((r = manager_open_serialization(&f)) < 0) { | |
506 | log_error("Failed to create serialization faile: %s", strerror(-r)); | |
507 | goto fail; | |
508 | } | |
509 | ||
510 | if (!(fds = fdset_new())) { | |
511 | r = -ENOMEM; | |
512 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
513 | goto fail; | |
514 | } | |
515 | ||
516 | if ((r = manager_serialize(m, f, fds)) < 0) { | |
517 | log_error("Failed to serialize state: %s", strerror(-r)); | |
518 | goto fail; | |
519 | } | |
520 | ||
521 | if (fseeko(f, 0, SEEK_SET) < 0) { | |
522 | log_error("Failed to rewind serialization fd: %m"); | |
523 | goto fail; | |
524 | } | |
525 | ||
526 | if ((r = fd_cloexec(fileno(f), false)) < 0) { | |
527 | log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r)); | |
528 | goto fail; | |
529 | } | |
530 | ||
531 | if ((r = fdset_cloexec(fds, false)) < 0) { | |
532 | log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r)); | |
533 | goto fail; | |
534 | } | |
535 | ||
536 | *_f = f; | |
537 | *_fds = fds; | |
538 | ||
539 | return 0; | |
540 | ||
541 | fail: | |
542 | fdset_free(fds); | |
543 | ||
544 | if (f) | |
545 | fclose(f); | |
546 | ||
547 | return r; | |
548 | } | |
549 | ||
60918275 LP |
550 | int main(int argc, char *argv[]) { |
551 | Manager *m = NULL; | |
87f0e418 | 552 | Unit *target = NULL; |
60918275 LP |
553 | Job *job = NULL; |
554 | int r, retval = 1; | |
a16e1123 LP |
555 | FDSet *fds = NULL; |
556 | bool reexecute = false; | |
27b14a22 | 557 | |
843d2643 | 558 | if (getpid() == 1) { |
a5dab5ce | 559 | running_as = MANAGER_INIT; |
843d2643 LP |
560 | log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); |
561 | } else | |
a5dab5ce LP |
562 | running_as = MANAGER_SESSION; |
563 | ||
f170852a LP |
564 | if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0) |
565 | goto finish; | |
60918275 | 566 | |
f170852a LP |
567 | /* Mount /proc, /sys and friends, so that /proc/cmdline and |
568 | * /proc/$PID/fd is available. */ | |
d89e521e LP |
569 | if (mount_setup() < 0) |
570 | goto finish; | |
4ade7963 LP |
571 | |
572 | /* Reset all signal handlers. */ | |
573 | assert_se(reset_all_signal_handlers() == 0); | |
574 | ||
078e4539 | 575 | /* If we are init, we can block sigkill. Yay. */ |
a337c6fc LP |
576 | ignore_signal(SIGKILL); |
577 | ignore_signal(SIGPIPE); | |
078e4539 | 578 | |
a5dab5ce LP |
579 | if (running_as != MANAGER_SESSION) |
580 | if (parse_proc_cmdline() < 0) | |
581 | goto finish; | |
f170852a LP |
582 | |
583 | log_parse_environment(); | |
584 | ||
585 | if (parse_argv(argc, argv) < 0) | |
586 | goto finish; | |
587 | ||
588 | if (action == ACTION_HELP) { | |
589 | retval = help(); | |
590 | goto finish; | |
e537352b LP |
591 | } else if (action == ACTION_DUMP_CONFIGURATION_ITEMS) { |
592 | unit_dump_config_items(stdout); | |
593 | retval = 0; | |
594 | goto finish; | |
f170852a LP |
595 | } |
596 | ||
e965d56d | 597 | assert_se(action == ACTION_RUN || action == ACTION_TEST); |
f170852a | 598 | |
a16e1123 LP |
599 | /* Remember open file descriptors for later deserialization */ |
600 | if (serialization) { | |
601 | if ((r = fdset_new_fill(&fds)) < 0) { | |
602 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
603 | goto finish; | |
604 | } | |
605 | ||
606 | assert_se(fdset_remove(fds, fileno(serialization)) >= 0); | |
607 | } else | |
608 | close_all_fds(NULL, 0); | |
609 | ||
09082a94 | 610 | /* Set up PATH unless it is already set */ |
e537352b LP |
611 | setenv("PATH", |
612 | "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", | |
613 | running_as == MANAGER_INIT); | |
09082a94 | 614 | |
f170852a LP |
615 | /* Move out of the way, so that we won't block unmounts */ |
616 | assert_se(chdir("/") == 0); | |
617 | ||
80876c20 LP |
618 | if (running_as != MANAGER_SESSION) { |
619 | /* Become a session leader if we aren't one yet. */ | |
620 | setsid(); | |
4ade7963 | 621 | |
80876c20 LP |
622 | /* Disable the umask logic */ |
623 | umask(0); | |
624 | } | |
625 | ||
843d2643 LP |
626 | /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */ |
627 | dbus_connection_set_change_sigpipe(FALSE); | |
628 | ||
2146621b LP |
629 | /* Reset the console, but only if this is really init and we |
630 | * are freshly booted */ | |
843d2643 | 631 | if (running_as != MANAGER_SESSION && action == ACTION_RUN) { |
2146621b | 632 | console_setup(getpid() == 1 && !serialization); |
843d2643 LP |
633 | make_null_stdio(); |
634 | } | |
4ade7963 | 635 | |
18149b9f | 636 | /* Open the logging devices, if possible and necessary */ |
843d2643 | 637 | log_open(); |
4ade7963 | 638 | |
5373d602 LP |
639 | /* Make sure we leave a core dump without panicing the |
640 | * kernel. */ | |
4fc935ca LP |
641 | if (getpid() == 1) |
642 | install_crash_handler(); | |
97c4f35c | 643 | |
a5dab5ce LP |
644 | log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as)); |
645 | ||
af5bc85d | 646 | if (running_as == MANAGER_INIT) { |
e537352b | 647 | hostname_setup(); |
af5bc85d LP |
648 | loopback_setup(); |
649 | } | |
302e8c4c | 650 | |
80876c20 | 651 | if ((r = manager_new(running_as, confirm_spawn, &m)) < 0) { |
8e274523 | 652 | log_error("Failed to allocate manager object: %s", strerror(-r)); |
60918275 LP |
653 | goto finish; |
654 | } | |
655 | ||
a16e1123 | 656 | if ((r = manager_startup(m, serialization, fds)) < 0) |
6e2ef85b | 657 | log_error("Failed to fully start up daemon: %s", strerror(-r)); |
a16e1123 LP |
658 | |
659 | if (fds) { | |
660 | /* This will close all file descriptors that were opened, but | |
661 | * not claimed by any unit. */ | |
662 | ||
663 | fdset_free(fds); | |
664 | fds = NULL; | |
f50e0a01 LP |
665 | } |
666 | ||
a16e1123 LP |
667 | if (serialization) { |
668 | fclose(serialization); | |
669 | serialization = NULL; | |
670 | } else { | |
671 | log_debug("Activating default unit: %s", default_unit); | |
672 | ||
673 | if ((r = manager_load_unit(m, default_unit, NULL, &target)) < 0) { | |
674 | log_error("Failed to load default target: %s", strerror(-r)); | |
27b14a22 | 675 | |
a16e1123 LP |
676 | log_info("Trying to load rescue target..."); |
677 | if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &target)) < 0) { | |
678 | log_error("Failed to load rescue target: %s", strerror(-r)); | |
679 | goto finish; | |
680 | } | |
681 | } | |
37d88da7 | 682 | |
a16e1123 | 683 | if (action == ACTION_TEST) { |
40d50879 | 684 | printf("-> By units:\n"); |
a16e1123 LP |
685 | manager_dump_units(m, stdout, "\t"); |
686 | } | |
687 | ||
688 | if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) { | |
689 | log_error("Failed to start default target: %s", strerror(-r)); | |
37d88da7 LP |
690 | goto finish; |
691 | } | |
60918275 | 692 | |
a16e1123 | 693 | if (action == ACTION_TEST) { |
40d50879 | 694 | printf("-> By jobs:\n"); |
a16e1123 LP |
695 | manager_dump_jobs(m, stdout, "\t"); |
696 | retval = 0; | |
697 | goto finish; | |
698 | } | |
e965d56d | 699 | } |
d46de8a1 | 700 | |
a16e1123 LP |
701 | for (;;) { |
702 | if ((r = manager_loop(m)) < 0) { | |
703 | log_error("Failed to run mainloop: %s", strerror(-r)); | |
704 | goto finish; | |
705 | } | |
11dd41ce | 706 | |
a16e1123 | 707 | switch (m->exit_code) { |
e965d56d | 708 | |
a16e1123 LP |
709 | case MANAGER_EXIT: |
710 | retval = 0; | |
711 | log_debug("Exit."); | |
712 | goto finish; | |
e965d56d | 713 | |
a16e1123 LP |
714 | case MANAGER_RELOAD: |
715 | if ((r = manager_reload(m)) < 0) | |
716 | log_error("Failed to reload: %s", strerror(-r)); | |
717 | break; | |
cea8e32e | 718 | |
a16e1123 | 719 | case MANAGER_REEXECUTE: |
a16e1123 LP |
720 | if (prepare_reexecute(m, &serialization, &fds) < 0) |
721 | goto finish; | |
60918275 | 722 | |
a16e1123 LP |
723 | reexecute = true; |
724 | log_debug("Reexecuting."); | |
725 | goto finish; | |
726 | ||
727 | default: | |
728 | assert_not_reached("Unknown exit code."); | |
729 | } | |
730 | } | |
f170852a | 731 | |
60918275 LP |
732 | finish: |
733 | if (m) | |
734 | manager_free(m); | |
735 | ||
f170852a | 736 | free(default_unit); |
b9cd2ec1 | 737 | |
ea430986 LP |
738 | dbus_shutdown(); |
739 | ||
a16e1123 LP |
740 | if (reexecute) { |
741 | const char *args[11]; | |
742 | unsigned i = 0; | |
743 | char sfd[16]; | |
744 | ||
745 | assert(serialization); | |
746 | assert(fds); | |
747 | ||
748 | args[i++] = SYSTEMD_BINARY_PATH; | |
749 | ||
750 | args[i++] = "--log-level"; | |
751 | args[i++] = log_level_to_string(log_get_max_level()); | |
752 | ||
753 | args[i++] = "--log-target"; | |
754 | args[i++] = log_target_to_string(log_get_target()); | |
755 | ||
756 | args[i++] = "--running-as"; | |
757 | args[i++] = manager_running_as_to_string(running_as); | |
758 | ||
759 | snprintf(sfd, sizeof(sfd), "%i", fileno(serialization)); | |
760 | char_array_0(sfd); | |
761 | ||
762 | args[i++] = "--deserialize"; | |
763 | args[i++] = sfd; | |
764 | ||
765 | if (confirm_spawn) | |
766 | args[i++] = "--confirm-spawn"; | |
767 | ||
768 | args[i++] = NULL; | |
769 | ||
770 | assert(i <= ELEMENTSOF(args)); | |
771 | ||
772 | execv(args[0], (char* const*) args); | |
773 | ||
774 | log_error("Failed to reexecute: %m"); | |
775 | } | |
776 | ||
777 | if (serialization) | |
778 | fclose(serialization); | |
779 | ||
780 | if (fds) | |
781 | fdset_free(fds); | |
782 | ||
c3b3c274 LP |
783 | if (getpid() == 1) |
784 | freeze(); | |
785 | ||
60918275 LP |
786 | return retval; |
787 | } |