]>
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" |
11c3a4ee | 40 | #include "kmod-setup.h" |
302e8c4c | 41 | #include "load-fragment.h" |
a16e1123 | 42 | #include "fdset.h" |
60918275 | 43 | |
f170852a LP |
44 | static enum { |
45 | ACTION_RUN, | |
e965d56d | 46 | ACTION_HELP, |
e537352b LP |
47 | ACTION_TEST, |
48 | ACTION_DUMP_CONFIGURATION_ITEMS | |
f170852a LP |
49 | } action = ACTION_RUN; |
50 | ||
51 | static char *default_unit = NULL; | |
a5dab5ce | 52 | static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID; |
4fc935ca | 53 | |
97c4f35c | 54 | static bool dump_core = true; |
601f6a1e LP |
55 | static bool crash_shell = false; |
56 | static int crash_chvt = -1; | |
80876c20 | 57 | static bool confirm_spawn = false; |
a16e1123 | 58 | static FILE* serialization = NULL; |
80876c20 | 59 | |
97c4f35c LP |
60 | _noreturn static void freeze(void) { |
61 | for (;;) | |
62 | pause(); | |
63 | } | |
64 | ||
6f5e3f35 LP |
65 | static void nop_handler(int sig) { |
66 | } | |
67 | ||
97c4f35c LP |
68 | _noreturn static void crash(int sig) { |
69 | ||
70 | if (!dump_core) | |
71 | log_error("Caught <%s>, not dumping core.", strsignal(sig)); | |
72 | else { | |
6f5e3f35 | 73 | struct sigaction sa; |
97c4f35c LP |
74 | pid_t pid; |
75 | ||
6f5e3f35 LP |
76 | /* We want to wait for the core process, hence let's enable SIGCHLD */ |
77 | zero(sa); | |
78 | sa.sa_handler = nop_handler; | |
79 | sa.sa_flags = SA_NOCLDSTOP|SA_RESTART; | |
80 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
81 | ||
97c4f35c | 82 | if ((pid = fork()) < 0) |
4fc935ca | 83 | log_error("Caught <%s>, cannot fork for core dump: %s", strsignal(sig), strerror(errno)); |
97c4f35c LP |
84 | |
85 | else if (pid == 0) { | |
97c4f35c LP |
86 | struct rlimit rl; |
87 | ||
88 | /* Enable default signal handler for core dump */ | |
89 | zero(sa); | |
90 | sa.sa_handler = SIG_DFL; | |
91 | assert_se(sigaction(sig, &sa, NULL) == 0); | |
92 | ||
93 | /* Don't limit the core dump size */ | |
94 | zero(rl); | |
95 | rl.rlim_cur = RLIM_INFINITY; | |
96 | rl.rlim_max = RLIM_INFINITY; | |
97 | setrlimit(RLIMIT_CORE, &rl); | |
98 | ||
99 | /* Just to be sure... */ | |
100 | assert_se(chdir("/") == 0); | |
101 | ||
102 | /* Raise the signal again */ | |
103 | raise(sig); | |
104 | ||
105 | assert_not_reached("We shouldn't be here..."); | |
106 | _exit(1); | |
4fc935ca LP |
107 | |
108 | } else { | |
109 | int status, r; | |
110 | ||
111 | /* Order things nicely. */ | |
112 | if ((r = waitpid(pid, &status, 0)) < 0) | |
113 | log_error("Caught <%s>, waitpid() failed: %s", strsignal(sig), strerror(errno)); | |
114 | else if (!WCOREDUMP(status)) | |
115 | log_error("Caught <%s>, core dump failed.", strsignal(sig)); | |
116 | else | |
117 | log_error("Caught <%s>, dumped core as pid %llu.", strsignal(sig), (unsigned long long) pid); | |
97c4f35c LP |
118 | } |
119 | } | |
120 | ||
601f6a1e LP |
121 | if (crash_chvt) |
122 | chvt(crash_chvt); | |
123 | ||
4fc935ca | 124 | if (crash_shell) { |
6f5e3f35 LP |
125 | struct sigaction sa; |
126 | pid_t pid; | |
8c43883a | 127 | |
4fc935ca LP |
128 | log_info("Executing crash shell in 10s..."); |
129 | sleep(10); | |
130 | ||
6f5e3f35 LP |
131 | /* Let the kernel reap children for us */ |
132 | zero(sa); | |
133 | sa.sa_handler = SIG_IGN; | |
134 | sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART; | |
135 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
8c43883a | 136 | |
6f5e3f35 LP |
137 | if ((pid = fork()) < 0) |
138 | log_error("Failed to fork off crash shell: %s", strerror(errno)); | |
139 | else if (pid == 0) { | |
843d2643 | 140 | int fd, r; |
ea5652c2 | 141 | |
21de3988 | 142 | if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0) |
ea5652c2 | 143 | log_error("Failed to acquire terminal: %s", strerror(-fd)); |
5b2a0903 | 144 | else if ((r = make_stdio(fd)) < 0) |
843d2643 | 145 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); |
ea5652c2 | 146 | |
6f5e3f35 LP |
147 | execl("/bin/sh", "/bin/sh", NULL); |
148 | ||
149 | log_error("execl() failed: %s", strerror(errno)); | |
150 | _exit(1); | |
151 | } | |
c99b188e | 152 | |
6f5e3f35 | 153 | log_info("Successfully spawned crash shall as pid %llu.", (unsigned long long) pid); |
4fc935ca LP |
154 | } |
155 | ||
156 | log_info("Freezing execution."); | |
97c4f35c LP |
157 | freeze(); |
158 | } | |
159 | ||
160 | static void install_crash_handler(void) { | |
161 | struct sigaction sa; | |
162 | ||
163 | zero(sa); | |
164 | ||
165 | sa.sa_handler = crash; | |
166 | sa.sa_flags = SA_NODEFER; | |
167 | ||
1b91d3e8 | 168 | sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1); |
97c4f35c | 169 | } |
f170852a | 170 | |
843d2643 LP |
171 | static int make_null_stdio(void) { |
172 | int null_fd, r; | |
80876c20 | 173 | |
c8513d54 | 174 | if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) { |
80876c20 | 175 | log_error("Failed to open /dev/null: %m"); |
843d2643 | 176 | return -errno; |
80876c20 LP |
177 | } |
178 | ||
843d2643 LP |
179 | if ((r = make_stdio(null_fd)) < 0) |
180 | log_warning("Failed to dup2() device: %s", strerror(-r)); | |
80876c20 | 181 | |
843d2643 LP |
182 | return r; |
183 | } | |
80876c20 | 184 | |
843d2643 LP |
185 | static int console_setup(bool do_reset) { |
186 | int tty_fd, r; | |
80876c20 | 187 | |
843d2643 LP |
188 | /* If we are init, we connect stdin/stdout/stderr to /dev/null |
189 | * and make sure we don't have a controlling tty. */ | |
80876c20 | 190 | |
843d2643 LP |
191 | release_terminal(); |
192 | ||
193 | if (!do_reset) | |
194 | return 0; | |
80876c20 | 195 | |
843d2643 LP |
196 | if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) { |
197 | log_error("Failed to open /dev/console: %s", strerror(-tty_fd)); | |
198 | return -tty_fd; | |
199 | } | |
80876c20 | 200 | |
843d2643 LP |
201 | if ((r = reset_terminal(tty_fd)) < 0) |
202 | log_error("Failed to reset /dev/console: %s", strerror(-r)); | |
203 | ||
204 | close_nointr_nofail(tty_fd); | |
80876c20 LP |
205 | return r; |
206 | } | |
207 | ||
f170852a LP |
208 | static int set_default_unit(const char *u) { |
209 | char *c; | |
210 | ||
211 | assert(u); | |
212 | ||
213 | if (!(c = strdup(u))) | |
214 | return -ENOMEM; | |
215 | ||
216 | free(default_unit); | |
217 | default_unit = c; | |
218 | return 0; | |
219 | } | |
220 | ||
221 | static int parse_proc_cmdline_word(const char *word) { | |
222 | ||
223 | static const char * const rlmap[] = { | |
224 | "single", SPECIAL_RUNLEVEL1_TARGET, | |
225 | "-s", SPECIAL_RUNLEVEL1_TARGET, | |
226 | "s", SPECIAL_RUNLEVEL1_TARGET, | |
227 | "S", SPECIAL_RUNLEVEL1_TARGET, | |
228 | "1", SPECIAL_RUNLEVEL1_TARGET, | |
229 | "2", SPECIAL_RUNLEVEL2_TARGET, | |
230 | "3", SPECIAL_RUNLEVEL3_TARGET, | |
231 | "4", SPECIAL_RUNLEVEL4_TARGET, | |
232 | "5", SPECIAL_RUNLEVEL5_TARGET | |
233 | }; | |
234 | ||
235 | if (startswith(word, "systemd.default=")) | |
82771ba1 | 236 | return set_default_unit(word + 16); |
f170852a LP |
237 | |
238 | else if (startswith(word, "systemd.log_target=")) { | |
239 | ||
240 | if (log_set_target_from_string(word + 19) < 0) | |
241 | log_warning("Failed to parse log target %s. Ignoring.", word + 19); | |
242 | ||
243 | } else if (startswith(word, "systemd.log_level=")) { | |
244 | ||
245 | if (log_set_max_level_from_string(word + 18) < 0) | |
246 | log_warning("Failed to parse log level %s. Ignoring.", word + 18); | |
247 | ||
4fc935ca LP |
248 | } else if (startswith(word, "systemd.dump_core=")) { |
249 | int r; | |
250 | ||
251 | if ((r = parse_boolean(word + 18)) < 0) | |
601f6a1e | 252 | log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18); |
4fc935ca LP |
253 | else |
254 | dump_core = r; | |
255 | ||
256 | } else if (startswith(word, "systemd.crash_shell=")) { | |
257 | int r; | |
258 | ||
259 | if ((r = parse_boolean(word + 20)) < 0) | |
601f6a1e | 260 | log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20); |
4fc935ca LP |
261 | else |
262 | crash_shell = r; | |
263 | ||
5e7ee61c LP |
264 | |
265 | } else if (startswith(word, "systemd.confirm_spawn=")) { | |
266 | int r; | |
267 | ||
268 | if ((r = parse_boolean(word + 22)) < 0) | |
269 | log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22); | |
270 | else | |
271 | confirm_spawn = r; | |
272 | ||
601f6a1e LP |
273 | } else if (startswith(word, "systemd.crash_chvt=")) { |
274 | int k; | |
275 | ||
276 | if (safe_atoi(word + 19, &k) < 0) | |
277 | log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19); | |
278 | else | |
279 | crash_chvt = k; | |
280 | ||
4fc935ca LP |
281 | } else if (startswith(word, "systemd.")) { |
282 | ||
283 | log_warning("Unknown kernel switch %s. Ignoring.", word); | |
284 | ||
285 | log_info("Supported kernel switches:"); | |
286 | log_info("systemd.default=UNIT Default unit to start"); | |
287 | log_info("systemd.log_target=console|kmsg|syslog Log target"); | |
288 | log_info("systemd.log_level=LEVEL Log level"); | |
289 | log_info("systemd.dump_core=0|1 Dump core on crash"); | |
290 | log_info("systemd.crash_shell=0|1 On crash run shell"); | |
601f6a1e | 291 | log_info("systemd.crash_chvt=N Change to VT #N on crash"); |
5e7ee61c | 292 | log_info("systemd.confirm_spawn=0|1 Confirm every process spawn"); |
4fc935ca | 293 | |
f170852a LP |
294 | } else { |
295 | unsigned i; | |
296 | ||
297 | /* SysV compatibility */ | |
f170852a LP |
298 | for (i = 0; i < ELEMENTSOF(rlmap); i += 2) |
299 | if (streq(word, rlmap[i])) | |
300 | return set_default_unit(rlmap[i+1]); | |
301 | } | |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | static int parse_proc_cmdline(void) { | |
307 | char *line; | |
308 | int r; | |
309 | char *w; | |
310 | size_t l; | |
311 | char *state; | |
312 | ||
313 | if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { | |
314 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno)); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
319 | char *word; | |
320 | ||
321 | if (!(word = strndup(w, l))) { | |
322 | r = -ENOMEM; | |
323 | goto finish; | |
324 | } | |
325 | ||
326 | r = parse_proc_cmdline_word(word); | |
327 | free(word); | |
328 | ||
329 | if (r < 0) | |
330 | goto finish; | |
331 | } | |
332 | ||
333 | r = 0; | |
334 | ||
335 | finish: | |
336 | free(line); | |
337 | return r; | |
338 | } | |
339 | ||
340 | static int parse_argv(int argc, char *argv[]) { | |
341 | ||
342 | enum { | |
343 | ARG_LOG_LEVEL = 0x100, | |
344 | ARG_LOG_TARGET, | |
a5dab5ce | 345 | ARG_DEFAULT, |
e965d56d | 346 | ARG_RUNNING_AS, |
e537352b | 347 | ARG_TEST, |
80876c20 | 348 | ARG_DUMP_CONFIGURATION_ITEMS, |
a16e1123 LP |
349 | ARG_CONFIRM_SPAWN, |
350 | ARG_DESERIALIZE | |
f170852a LP |
351 | }; |
352 | ||
353 | static const struct option options[] = { | |
a16e1123 LP |
354 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, |
355 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
356 | { "default", required_argument, NULL, ARG_DEFAULT }, | |
357 | { "running-as", required_argument, NULL, ARG_RUNNING_AS }, | |
358 | { "test", no_argument, NULL, ARG_TEST }, | |
359 | { "help", no_argument, NULL, 'h' }, | |
360 | { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS }, | |
361 | { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN }, | |
362 | { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, | |
363 | { NULL, 0, NULL, 0 } | |
f170852a LP |
364 | }; |
365 | ||
366 | int c, r; | |
367 | ||
368 | assert(argc >= 1); | |
369 | assert(argv); | |
370 | ||
371 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
372 | ||
373 | switch (c) { | |
374 | ||
375 | case ARG_LOG_LEVEL: | |
376 | if ((r = log_set_max_level_from_string(optarg)) < 0) { | |
377 | log_error("Failed to parse log level %s.", optarg); | |
378 | return r; | |
379 | } | |
380 | ||
381 | break; | |
382 | ||
383 | case ARG_LOG_TARGET: | |
384 | ||
385 | if ((r = log_set_target_from_string(optarg)) < 0) { | |
386 | log_error("Failed to parse log target %s.", optarg); | |
387 | return r; | |
388 | } | |
389 | ||
390 | break; | |
391 | ||
392 | case ARG_DEFAULT: | |
393 | ||
394 | if ((r = set_default_unit(optarg)) < 0) { | |
395 | log_error("Failed to set default unit %s: %s", optarg, strerror(-r)); | |
396 | return r; | |
397 | } | |
398 | ||
399 | break; | |
400 | ||
a5dab5ce LP |
401 | case ARG_RUNNING_AS: { |
402 | ManagerRunningAs as; | |
403 | ||
404 | if ((as = manager_running_as_from_string(optarg)) < 0) { | |
405 | log_error("Failed to parse running as value %s", optarg); | |
406 | return -EINVAL; | |
407 | } | |
408 | ||
409 | running_as = as; | |
410 | break; | |
411 | } | |
412 | ||
e965d56d LP |
413 | case ARG_TEST: |
414 | action = ACTION_TEST; | |
415 | break; | |
416 | ||
e537352b LP |
417 | case ARG_DUMP_CONFIGURATION_ITEMS: |
418 | action = ACTION_DUMP_CONFIGURATION_ITEMS; | |
419 | break; | |
420 | ||
80876c20 LP |
421 | case ARG_CONFIRM_SPAWN: |
422 | confirm_spawn = true; | |
423 | break; | |
424 | ||
a16e1123 LP |
425 | case ARG_DESERIALIZE: { |
426 | int fd; | |
427 | FILE *f; | |
428 | ||
429 | if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) { | |
430 | log_error("Failed to parse deserialize option %s.", optarg); | |
431 | return r; | |
432 | } | |
433 | ||
434 | if (!(f = fdopen(fd, "r"))) { | |
435 | log_error("Failed to open serialization fd: %m"); | |
436 | return r; | |
437 | } | |
438 | ||
439 | if (serialization) | |
440 | fclose(serialization); | |
441 | ||
442 | serialization = f; | |
443 | ||
444 | break; | |
445 | } | |
446 | ||
f170852a LP |
447 | case 'h': |
448 | action = ACTION_HELP; | |
449 | break; | |
450 | ||
451 | case '?': | |
452 | return -EINVAL; | |
453 | ||
454 | default: | |
455 | log_error("Unknown option code %c", c); | |
456 | return -EINVAL; | |
457 | } | |
458 | ||
51f0e189 LP |
459 | /* PID 1 will get the kernel arguments as parameters, which we |
460 | * ignore and unconditionally read from | |
461 | * /proc/cmdline. However, we need to ignore those arguments | |
462 | * here. */ | |
463 | if (running_as != MANAGER_INIT && optind < argc) { | |
464 | log_error("Excess arguments."); | |
465 | return -EINVAL; | |
466 | } | |
467 | ||
f170852a LP |
468 | return 0; |
469 | } | |
470 | ||
471 | static int help(void) { | |
472 | ||
473 | printf("%s [options]\n\n" | |
e537352b LP |
474 | " -h --help Show this help\n" |
475 | " --default=UNIT Set default unit\n" | |
476 | " --log-level=LEVEL Set log level\n" | |
843d2643 | 477 | " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg)\n" |
e537352b LP |
478 | " --running-as=AS Set running as (init, system, session)\n" |
479 | " --test Determine startup sequence, dump it and exit\n" | |
80876c20 LP |
480 | " --dump-configuration-items Dump understood unit configuration items\n" |
481 | " --confirm-spawn Ask for confirmation when spawning processes\n", | |
f170852a LP |
482 | __progname); |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
a16e1123 LP |
487 | static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { |
488 | FILE *f = NULL; | |
489 | FDSet *fds = NULL; | |
490 | int r; | |
491 | ||
492 | assert(m); | |
493 | assert(_f); | |
494 | assert(_fds); | |
495 | ||
496 | if ((r = manager_open_serialization(&f)) < 0) { | |
497 | log_error("Failed to create serialization faile: %s", strerror(-r)); | |
498 | goto fail; | |
499 | } | |
500 | ||
501 | if (!(fds = fdset_new())) { | |
502 | r = -ENOMEM; | |
503 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
504 | goto fail; | |
505 | } | |
506 | ||
507 | if ((r = manager_serialize(m, f, fds)) < 0) { | |
508 | log_error("Failed to serialize state: %s", strerror(-r)); | |
509 | goto fail; | |
510 | } | |
511 | ||
512 | if (fseeko(f, 0, SEEK_SET) < 0) { | |
513 | log_error("Failed to rewind serialization fd: %m"); | |
514 | goto fail; | |
515 | } | |
516 | ||
517 | if ((r = fd_cloexec(fileno(f), false)) < 0) { | |
518 | log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r)); | |
519 | goto fail; | |
520 | } | |
521 | ||
522 | if ((r = fdset_cloexec(fds, false)) < 0) { | |
523 | log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r)); | |
524 | goto fail; | |
525 | } | |
526 | ||
527 | *_f = f; | |
528 | *_fds = fds; | |
529 | ||
530 | return 0; | |
531 | ||
532 | fail: | |
533 | fdset_free(fds); | |
534 | ||
535 | if (f) | |
536 | fclose(f); | |
537 | ||
538 | return r; | |
539 | } | |
540 | ||
60918275 LP |
541 | int main(int argc, char *argv[]) { |
542 | Manager *m = NULL; | |
87f0e418 | 543 | Unit *target = NULL; |
60918275 LP |
544 | Job *job = NULL; |
545 | int r, retval = 1; | |
a16e1123 LP |
546 | FDSet *fds = NULL; |
547 | bool reexecute = false; | |
27b14a22 | 548 | |
843d2643 | 549 | if (getpid() == 1) { |
a5dab5ce | 550 | running_as = MANAGER_INIT; |
843d2643 LP |
551 | log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); |
552 | } else | |
a5dab5ce LP |
553 | running_as = MANAGER_SESSION; |
554 | ||
f170852a LP |
555 | if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0) |
556 | goto finish; | |
60918275 | 557 | |
f170852a LP |
558 | /* Mount /proc, /sys and friends, so that /proc/cmdline and |
559 | * /proc/$PID/fd is available. */ | |
d89e521e LP |
560 | if (mount_setup() < 0) |
561 | goto finish; | |
4ade7963 LP |
562 | |
563 | /* Reset all signal handlers. */ | |
564 | assert_se(reset_all_signal_handlers() == 0); | |
565 | ||
078e4539 | 566 | /* If we are init, we can block sigkill. Yay. */ |
9a34ec5f | 567 | ignore_signals(SIGNALS_IGNORE, -1); |
078e4539 | 568 | |
a5dab5ce LP |
569 | if (running_as != MANAGER_SESSION) |
570 | if (parse_proc_cmdline() < 0) | |
571 | goto finish; | |
f170852a LP |
572 | |
573 | log_parse_environment(); | |
574 | ||
575 | if (parse_argv(argc, argv) < 0) | |
576 | goto finish; | |
577 | ||
578 | if (action == ACTION_HELP) { | |
579 | retval = help(); | |
580 | goto finish; | |
e537352b LP |
581 | } else if (action == ACTION_DUMP_CONFIGURATION_ITEMS) { |
582 | unit_dump_config_items(stdout); | |
583 | retval = 0; | |
584 | goto finish; | |
f170852a LP |
585 | } |
586 | ||
e965d56d | 587 | assert_se(action == ACTION_RUN || action == ACTION_TEST); |
f170852a | 588 | |
a16e1123 LP |
589 | /* Remember open file descriptors for later deserialization */ |
590 | if (serialization) { | |
591 | if ((r = fdset_new_fill(&fds)) < 0) { | |
592 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
593 | goto finish; | |
594 | } | |
595 | ||
596 | assert_se(fdset_remove(fds, fileno(serialization)) >= 0); | |
597 | } else | |
598 | close_all_fds(NULL, 0); | |
599 | ||
09082a94 | 600 | /* Set up PATH unless it is already set */ |
e537352b LP |
601 | setenv("PATH", |
602 | "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", | |
603 | running_as == MANAGER_INIT); | |
09082a94 | 604 | |
f170852a LP |
605 | /* Move out of the way, so that we won't block unmounts */ |
606 | assert_se(chdir("/") == 0); | |
607 | ||
80876c20 LP |
608 | if (running_as != MANAGER_SESSION) { |
609 | /* Become a session leader if we aren't one yet. */ | |
610 | setsid(); | |
4ade7963 | 611 | |
80876c20 LP |
612 | /* Disable the umask logic */ |
613 | umask(0); | |
614 | } | |
615 | ||
843d2643 LP |
616 | /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */ |
617 | dbus_connection_set_change_sigpipe(FALSE); | |
618 | ||
2146621b LP |
619 | /* Reset the console, but only if this is really init and we |
620 | * are freshly booted */ | |
843d2643 | 621 | if (running_as != MANAGER_SESSION && action == ACTION_RUN) { |
2146621b | 622 | console_setup(getpid() == 1 && !serialization); |
843d2643 LP |
623 | make_null_stdio(); |
624 | } | |
4ade7963 | 625 | |
18149b9f | 626 | /* Open the logging devices, if possible and necessary */ |
843d2643 | 627 | log_open(); |
4ade7963 | 628 | |
5373d602 LP |
629 | /* Make sure we leave a core dump without panicing the |
630 | * kernel. */ | |
4fc935ca LP |
631 | if (getpid() == 1) |
632 | install_crash_handler(); | |
97c4f35c | 633 | |
a5dab5ce LP |
634 | log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as)); |
635 | ||
af5bc85d | 636 | if (running_as == MANAGER_INIT) { |
11c3a4ee | 637 | kmod_setup(); |
e537352b | 638 | hostname_setup(); |
af5bc85d LP |
639 | loopback_setup(); |
640 | } | |
302e8c4c | 641 | |
80876c20 | 642 | if ((r = manager_new(running_as, confirm_spawn, &m)) < 0) { |
8e274523 | 643 | log_error("Failed to allocate manager object: %s", strerror(-r)); |
60918275 LP |
644 | goto finish; |
645 | } | |
646 | ||
a16e1123 | 647 | if ((r = manager_startup(m, serialization, fds)) < 0) |
6e2ef85b | 648 | log_error("Failed to fully start up daemon: %s", strerror(-r)); |
a16e1123 LP |
649 | |
650 | if (fds) { | |
651 | /* This will close all file descriptors that were opened, but | |
652 | * not claimed by any unit. */ | |
653 | ||
654 | fdset_free(fds); | |
655 | fds = NULL; | |
f50e0a01 LP |
656 | } |
657 | ||
a16e1123 LP |
658 | if (serialization) { |
659 | fclose(serialization); | |
660 | serialization = NULL; | |
661 | } else { | |
662 | log_debug("Activating default unit: %s", default_unit); | |
663 | ||
664 | if ((r = manager_load_unit(m, default_unit, NULL, &target)) < 0) { | |
665 | log_error("Failed to load default target: %s", strerror(-r)); | |
27b14a22 | 666 | |
a16e1123 LP |
667 | log_info("Trying to load rescue target..."); |
668 | if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &target)) < 0) { | |
669 | log_error("Failed to load rescue target: %s", strerror(-r)); | |
670 | goto finish; | |
671 | } | |
672 | } | |
37d88da7 | 673 | |
a16e1123 | 674 | if (action == ACTION_TEST) { |
40d50879 | 675 | printf("-> By units:\n"); |
a16e1123 LP |
676 | manager_dump_units(m, stdout, "\t"); |
677 | } | |
678 | ||
679 | if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) { | |
680 | log_error("Failed to start default target: %s", strerror(-r)); | |
37d88da7 LP |
681 | goto finish; |
682 | } | |
60918275 | 683 | |
a16e1123 | 684 | if (action == ACTION_TEST) { |
40d50879 | 685 | printf("-> By jobs:\n"); |
a16e1123 LP |
686 | manager_dump_jobs(m, stdout, "\t"); |
687 | retval = 0; | |
688 | goto finish; | |
689 | } | |
e965d56d | 690 | } |
d46de8a1 | 691 | |
a16e1123 LP |
692 | for (;;) { |
693 | if ((r = manager_loop(m)) < 0) { | |
694 | log_error("Failed to run mainloop: %s", strerror(-r)); | |
695 | goto finish; | |
696 | } | |
11dd41ce | 697 | |
a16e1123 | 698 | switch (m->exit_code) { |
e965d56d | 699 | |
a16e1123 LP |
700 | case MANAGER_EXIT: |
701 | retval = 0; | |
702 | log_debug("Exit."); | |
703 | goto finish; | |
e965d56d | 704 | |
a16e1123 LP |
705 | case MANAGER_RELOAD: |
706 | if ((r = manager_reload(m)) < 0) | |
707 | log_error("Failed to reload: %s", strerror(-r)); | |
708 | break; | |
cea8e32e | 709 | |
a16e1123 | 710 | case MANAGER_REEXECUTE: |
a16e1123 LP |
711 | if (prepare_reexecute(m, &serialization, &fds) < 0) |
712 | goto finish; | |
60918275 | 713 | |
a16e1123 LP |
714 | reexecute = true; |
715 | log_debug("Reexecuting."); | |
716 | goto finish; | |
717 | ||
718 | default: | |
719 | assert_not_reached("Unknown exit code."); | |
720 | } | |
721 | } | |
f170852a | 722 | |
60918275 LP |
723 | finish: |
724 | if (m) | |
725 | manager_free(m); | |
726 | ||
f170852a | 727 | free(default_unit); |
b9cd2ec1 | 728 | |
ea430986 LP |
729 | dbus_shutdown(); |
730 | ||
a16e1123 LP |
731 | if (reexecute) { |
732 | const char *args[11]; | |
733 | unsigned i = 0; | |
734 | char sfd[16]; | |
735 | ||
736 | assert(serialization); | |
737 | assert(fds); | |
738 | ||
739 | args[i++] = SYSTEMD_BINARY_PATH; | |
740 | ||
741 | args[i++] = "--log-level"; | |
742 | args[i++] = log_level_to_string(log_get_max_level()); | |
743 | ||
744 | args[i++] = "--log-target"; | |
745 | args[i++] = log_target_to_string(log_get_target()); | |
746 | ||
747 | args[i++] = "--running-as"; | |
748 | args[i++] = manager_running_as_to_string(running_as); | |
749 | ||
750 | snprintf(sfd, sizeof(sfd), "%i", fileno(serialization)); | |
751 | char_array_0(sfd); | |
752 | ||
753 | args[i++] = "--deserialize"; | |
754 | args[i++] = sfd; | |
755 | ||
756 | if (confirm_spawn) | |
757 | args[i++] = "--confirm-spawn"; | |
758 | ||
759 | args[i++] = NULL; | |
760 | ||
761 | assert(i <= ELEMENTSOF(args)); | |
762 | ||
763 | execv(args[0], (char* const*) args); | |
764 | ||
765 | log_error("Failed to reexecute: %m"); | |
766 | } | |
767 | ||
768 | if (serialization) | |
769 | fclose(serialization); | |
770 | ||
771 | if (fds) | |
772 | fdset_free(fds); | |
773 | ||
c3b3c274 LP |
774 | if (getpid() == 1) |
775 | freeze(); | |
776 | ||
60918275 LP |
777 | return retval; |
778 | } |