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Commit | Line | Data |
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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) { | |
139 | execl("/bin/sh", "/bin/sh", NULL); | |
140 | ||
141 | log_error("execl() failed: %s", strerror(errno)); | |
142 | _exit(1); | |
143 | } | |
c99b188e | 144 | |
6f5e3f35 | 145 | log_info("Successfully spawned crash shall as pid %llu.", (unsigned long long) pid); |
4fc935ca LP |
146 | } |
147 | ||
148 | log_info("Freezing execution."); | |
97c4f35c LP |
149 | freeze(); |
150 | } | |
151 | ||
152 | static void install_crash_handler(void) { | |
153 | struct sigaction sa; | |
154 | ||
155 | zero(sa); | |
156 | ||
157 | sa.sa_handler = crash; | |
158 | sa.sa_flags = SA_NODEFER; | |
159 | ||
160 | assert_se(sigaction(SIGSEGV, &sa, NULL) == 0); | |
5373d602 LP |
161 | assert_se(sigaction(SIGILL, &sa, NULL) == 0); |
162 | assert_se(sigaction(SIGFPE, &sa, NULL) == 0); | |
163 | assert_se(sigaction(SIGBUS, &sa, NULL) == 0); | |
164 | assert_se(sigaction(SIGQUIT, &sa, NULL) == 0); | |
97c4f35c LP |
165 | assert_se(sigaction(SIGABRT, &sa, NULL) == 0); |
166 | } | |
f170852a | 167 | |
2146621b | 168 | static int console_setup(bool do_reset) { |
80876c20 LP |
169 | int tty_fd = -1, null_fd = -1, r = 0; |
170 | ||
171 | /* If we are init, we connect stdout/stderr to /dev/console | |
172 | * and stdin to /dev/null and make sure we don't have a | |
173 | * controlling tty. */ | |
174 | ||
175 | release_terminal(); | |
176 | ||
177 | if ((tty_fd = open_terminal("/dev/console", O_WRONLY)) < 0) { | |
178 | log_error("Failed to open /dev/console: %s", strerror(-tty_fd)); | |
179 | r = -tty_fd; | |
180 | goto finish; | |
181 | } | |
182 | ||
183 | if ((null_fd = open("/dev/null", O_RDONLY)) < 0) { | |
184 | log_error("Failed to open /dev/null: %m"); | |
185 | r = -errno; | |
186 | goto finish; | |
187 | } | |
188 | ||
189 | assert(tty_fd >= 3); | |
190 | assert(null_fd >= 3); | |
191 | ||
2146621b LP |
192 | if (do_reset) |
193 | if (reset_terminal(tty_fd) < 0) | |
194 | log_error("Failed to reset /dev/console: %m"); | |
80876c20 LP |
195 | |
196 | if (dup2(tty_fd, STDOUT_FILENO) < 0 || | |
197 | dup2(tty_fd, STDERR_FILENO) < 0 || | |
198 | dup2(null_fd, STDIN_FILENO) < 0) { | |
199 | log_error("Failed to dup2() device: %m"); | |
200 | r = -errno; | |
201 | goto finish; | |
202 | } | |
203 | ||
204 | r = 0; | |
205 | ||
206 | finish: | |
207 | if (tty_fd >= 0) | |
a16e1123 | 208 | close_nointr_nofail(tty_fd); |
80876c20 LP |
209 | |
210 | if (null_fd >= 0) | |
a16e1123 | 211 | close_nointr_nofail(null_fd); |
80876c20 LP |
212 | |
213 | return r; | |
214 | } | |
215 | ||
f170852a LP |
216 | static int set_default_unit(const char *u) { |
217 | char *c; | |
218 | ||
219 | assert(u); | |
220 | ||
221 | if (!(c = strdup(u))) | |
222 | return -ENOMEM; | |
223 | ||
224 | free(default_unit); | |
225 | default_unit = c; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int parse_proc_cmdline_word(const char *word) { | |
230 | ||
231 | static const char * const rlmap[] = { | |
232 | "single", SPECIAL_RUNLEVEL1_TARGET, | |
233 | "-s", SPECIAL_RUNLEVEL1_TARGET, | |
234 | "s", SPECIAL_RUNLEVEL1_TARGET, | |
235 | "S", SPECIAL_RUNLEVEL1_TARGET, | |
236 | "1", SPECIAL_RUNLEVEL1_TARGET, | |
237 | "2", SPECIAL_RUNLEVEL2_TARGET, | |
238 | "3", SPECIAL_RUNLEVEL3_TARGET, | |
239 | "4", SPECIAL_RUNLEVEL4_TARGET, | |
240 | "5", SPECIAL_RUNLEVEL5_TARGET | |
241 | }; | |
242 | ||
243 | if (startswith(word, "systemd.default=")) | |
82771ba1 | 244 | return set_default_unit(word + 16); |
f170852a LP |
245 | |
246 | else if (startswith(word, "systemd.log_target=")) { | |
247 | ||
248 | if (log_set_target_from_string(word + 19) < 0) | |
249 | log_warning("Failed to parse log target %s. Ignoring.", word + 19); | |
250 | ||
251 | } else if (startswith(word, "systemd.log_level=")) { | |
252 | ||
253 | if (log_set_max_level_from_string(word + 18) < 0) | |
254 | log_warning("Failed to parse log level %s. Ignoring.", word + 18); | |
255 | ||
4fc935ca LP |
256 | } else if (startswith(word, "systemd.dump_core=")) { |
257 | int r; | |
258 | ||
259 | if ((r = parse_boolean(word + 18)) < 0) | |
601f6a1e | 260 | log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18); |
4fc935ca LP |
261 | else |
262 | dump_core = r; | |
263 | ||
264 | } else if (startswith(word, "systemd.crash_shell=")) { | |
265 | int r; | |
266 | ||
267 | if ((r = parse_boolean(word + 20)) < 0) | |
601f6a1e | 268 | log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20); |
4fc935ca LP |
269 | else |
270 | crash_shell = r; | |
271 | ||
5e7ee61c LP |
272 | |
273 | } else if (startswith(word, "systemd.confirm_spawn=")) { | |
274 | int r; | |
275 | ||
276 | if ((r = parse_boolean(word + 22)) < 0) | |
277 | log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22); | |
278 | else | |
279 | confirm_spawn = r; | |
280 | ||
601f6a1e LP |
281 | } else if (startswith(word, "systemd.crash_chvt=")) { |
282 | int k; | |
283 | ||
284 | if (safe_atoi(word + 19, &k) < 0) | |
285 | log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19); | |
286 | else | |
287 | crash_chvt = k; | |
288 | ||
4fc935ca LP |
289 | } else if (startswith(word, "systemd.")) { |
290 | ||
291 | log_warning("Unknown kernel switch %s. Ignoring.", word); | |
292 | ||
293 | log_info("Supported kernel switches:"); | |
294 | log_info("systemd.default=UNIT Default unit to start"); | |
295 | log_info("systemd.log_target=console|kmsg|syslog Log target"); | |
296 | log_info("systemd.log_level=LEVEL Log level"); | |
297 | log_info("systemd.dump_core=0|1 Dump core on crash"); | |
298 | log_info("systemd.crash_shell=0|1 On crash run shell"); | |
601f6a1e | 299 | log_info("systemd.crash_chvt=N Change to VT #N on crash"); |
5e7ee61c | 300 | log_info("systemd.confirm_spawn=0|1 Confirm every process spawn"); |
4fc935ca | 301 | |
f170852a LP |
302 | } else { |
303 | unsigned i; | |
304 | ||
305 | /* SysV compatibility */ | |
f170852a LP |
306 | for (i = 0; i < ELEMENTSOF(rlmap); i += 2) |
307 | if (streq(word, rlmap[i])) | |
308 | return set_default_unit(rlmap[i+1]); | |
309 | } | |
310 | ||
311 | return 0; | |
312 | } | |
313 | ||
314 | static int parse_proc_cmdline(void) { | |
315 | char *line; | |
316 | int r; | |
317 | char *w; | |
318 | size_t l; | |
319 | char *state; | |
320 | ||
321 | if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { | |
322 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno)); | |
323 | return 0; | |
324 | } | |
325 | ||
326 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
327 | char *word; | |
328 | ||
329 | if (!(word = strndup(w, l))) { | |
330 | r = -ENOMEM; | |
331 | goto finish; | |
332 | } | |
333 | ||
334 | r = parse_proc_cmdline_word(word); | |
335 | free(word); | |
336 | ||
337 | if (r < 0) | |
338 | goto finish; | |
339 | } | |
340 | ||
341 | r = 0; | |
342 | ||
343 | finish: | |
344 | free(line); | |
345 | return r; | |
346 | } | |
347 | ||
348 | static int parse_argv(int argc, char *argv[]) { | |
349 | ||
350 | enum { | |
351 | ARG_LOG_LEVEL = 0x100, | |
352 | ARG_LOG_TARGET, | |
a5dab5ce | 353 | ARG_DEFAULT, |
e965d56d | 354 | ARG_RUNNING_AS, |
e537352b | 355 | ARG_TEST, |
80876c20 | 356 | ARG_DUMP_CONFIGURATION_ITEMS, |
a16e1123 LP |
357 | ARG_CONFIRM_SPAWN, |
358 | ARG_DESERIALIZE | |
f170852a LP |
359 | }; |
360 | ||
361 | static const struct option options[] = { | |
a16e1123 LP |
362 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, |
363 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
364 | { "default", required_argument, NULL, ARG_DEFAULT }, | |
365 | { "running-as", required_argument, NULL, ARG_RUNNING_AS }, | |
366 | { "test", no_argument, NULL, ARG_TEST }, | |
367 | { "help", no_argument, NULL, 'h' }, | |
368 | { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS }, | |
369 | { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN }, | |
370 | { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, | |
371 | { NULL, 0, NULL, 0 } | |
f170852a LP |
372 | }; |
373 | ||
374 | int c, r; | |
375 | ||
376 | assert(argc >= 1); | |
377 | assert(argv); | |
378 | ||
379 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
380 | ||
381 | switch (c) { | |
382 | ||
383 | case ARG_LOG_LEVEL: | |
384 | if ((r = log_set_max_level_from_string(optarg)) < 0) { | |
385 | log_error("Failed to parse log level %s.", optarg); | |
386 | return r; | |
387 | } | |
388 | ||
389 | break; | |
390 | ||
391 | case ARG_LOG_TARGET: | |
392 | ||
393 | if ((r = log_set_target_from_string(optarg)) < 0) { | |
394 | log_error("Failed to parse log target %s.", optarg); | |
395 | return r; | |
396 | } | |
397 | ||
398 | break; | |
399 | ||
400 | case ARG_DEFAULT: | |
401 | ||
402 | if ((r = set_default_unit(optarg)) < 0) { | |
403 | log_error("Failed to set default unit %s: %s", optarg, strerror(-r)); | |
404 | return r; | |
405 | } | |
406 | ||
407 | break; | |
408 | ||
a5dab5ce LP |
409 | case ARG_RUNNING_AS: { |
410 | ManagerRunningAs as; | |
411 | ||
412 | if ((as = manager_running_as_from_string(optarg)) < 0) { | |
413 | log_error("Failed to parse running as value %s", optarg); | |
414 | return -EINVAL; | |
415 | } | |
416 | ||
417 | running_as = as; | |
418 | break; | |
419 | } | |
420 | ||
e965d56d LP |
421 | case ARG_TEST: |
422 | action = ACTION_TEST; | |
423 | break; | |
424 | ||
e537352b LP |
425 | case ARG_DUMP_CONFIGURATION_ITEMS: |
426 | action = ACTION_DUMP_CONFIGURATION_ITEMS; | |
427 | break; | |
428 | ||
80876c20 LP |
429 | case ARG_CONFIRM_SPAWN: |
430 | confirm_spawn = true; | |
431 | break; | |
432 | ||
a16e1123 LP |
433 | case ARG_DESERIALIZE: { |
434 | int fd; | |
435 | FILE *f; | |
436 | ||
437 | if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) { | |
438 | log_error("Failed to parse deserialize option %s.", optarg); | |
439 | return r; | |
440 | } | |
441 | ||
442 | if (!(f = fdopen(fd, "r"))) { | |
443 | log_error("Failed to open serialization fd: %m"); | |
444 | return r; | |
445 | } | |
446 | ||
447 | if (serialization) | |
448 | fclose(serialization); | |
449 | ||
450 | serialization = f; | |
451 | ||
452 | break; | |
453 | } | |
454 | ||
f170852a LP |
455 | case 'h': |
456 | action = ACTION_HELP; | |
457 | break; | |
458 | ||
459 | case '?': | |
460 | return -EINVAL; | |
461 | ||
462 | default: | |
463 | log_error("Unknown option code %c", c); | |
464 | return -EINVAL; | |
465 | } | |
466 | ||
51f0e189 LP |
467 | /* PID 1 will get the kernel arguments as parameters, which we |
468 | * ignore and unconditionally read from | |
469 | * /proc/cmdline. However, we need to ignore those arguments | |
470 | * here. */ | |
471 | if (running_as != MANAGER_INIT && optind < argc) { | |
472 | log_error("Excess arguments."); | |
473 | return -EINVAL; | |
474 | } | |
475 | ||
f170852a LP |
476 | return 0; |
477 | } | |
478 | ||
479 | static int help(void) { | |
480 | ||
481 | printf("%s [options]\n\n" | |
e537352b LP |
482 | " -h --help Show this help\n" |
483 | " --default=UNIT Set default unit\n" | |
484 | " --log-level=LEVEL Set log level\n" | |
485 | " --log-target=TARGET Set log target (console, syslog, kmsg)\n" | |
486 | " --running-as=AS Set running as (init, system, session)\n" | |
487 | " --test Determine startup sequence, dump it and exit\n" | |
80876c20 LP |
488 | " --dump-configuration-items Dump understood unit configuration items\n" |
489 | " --confirm-spawn Ask for confirmation when spawning processes\n", | |
f170852a LP |
490 | __progname); |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
a16e1123 LP |
495 | static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { |
496 | FILE *f = NULL; | |
497 | FDSet *fds = NULL; | |
498 | int r; | |
499 | ||
500 | assert(m); | |
501 | assert(_f); | |
502 | assert(_fds); | |
503 | ||
504 | if ((r = manager_open_serialization(&f)) < 0) { | |
505 | log_error("Failed to create serialization faile: %s", strerror(-r)); | |
506 | goto fail; | |
507 | } | |
508 | ||
509 | if (!(fds = fdset_new())) { | |
510 | r = -ENOMEM; | |
511 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
512 | goto fail; | |
513 | } | |
514 | ||
515 | if ((r = manager_serialize(m, f, fds)) < 0) { | |
516 | log_error("Failed to serialize state: %s", strerror(-r)); | |
517 | goto fail; | |
518 | } | |
519 | ||
520 | if (fseeko(f, 0, SEEK_SET) < 0) { | |
521 | log_error("Failed to rewind serialization fd: %m"); | |
522 | goto fail; | |
523 | } | |
524 | ||
525 | if ((r = fd_cloexec(fileno(f), false)) < 0) { | |
526 | log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r)); | |
527 | goto fail; | |
528 | } | |
529 | ||
530 | if ((r = fdset_cloexec(fds, false)) < 0) { | |
531 | log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r)); | |
532 | goto fail; | |
533 | } | |
534 | ||
535 | *_f = f; | |
536 | *_fds = fds; | |
537 | ||
538 | return 0; | |
539 | ||
540 | fail: | |
541 | fdset_free(fds); | |
542 | ||
543 | if (f) | |
544 | fclose(f); | |
545 | ||
546 | return r; | |
547 | } | |
548 | ||
60918275 LP |
549 | int main(int argc, char *argv[]) { |
550 | Manager *m = NULL; | |
87f0e418 | 551 | Unit *target = NULL; |
60918275 LP |
552 | Job *job = NULL; |
553 | int r, retval = 1; | |
a16e1123 LP |
554 | FDSet *fds = NULL; |
555 | bool reexecute = false; | |
27b14a22 | 556 | |
a5dab5ce LP |
557 | if (getpid() == 1) |
558 | running_as = MANAGER_INIT; | |
559 | else if (getuid() == 0) | |
560 | running_as = MANAGER_SYSTEM; | |
561 | else | |
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 | ||
2146621b LP |
626 | /* Reset the console, but only if this is really init and we |
627 | * are freshly booted */ | |
8d025b23 | 628 | if (running_as == MANAGER_INIT && action == ACTION_RUN) |
2146621b | 629 | console_setup(getpid() == 1 && !serialization); |
4ade7963 LP |
630 | |
631 | /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */ | |
632 | dbus_connection_set_change_sigpipe(FALSE); | |
633 | ||
18149b9f | 634 | /* Open the logging devices, if possible and necessary */ |
4ade7963 LP |
635 | log_open_syslog(); |
636 | log_open_kmsg(); | |
637 | ||
5373d602 LP |
638 | /* Make sure we leave a core dump without panicing the |
639 | * kernel. */ | |
4fc935ca LP |
640 | if (getpid() == 1) |
641 | install_crash_handler(); | |
97c4f35c | 642 | |
a5dab5ce LP |
643 | log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as)); |
644 | ||
af5bc85d | 645 | if (running_as == MANAGER_INIT) { |
e537352b | 646 | hostname_setup(); |
af5bc85d LP |
647 | loopback_setup(); |
648 | } | |
302e8c4c | 649 | |
80876c20 | 650 | if ((r = manager_new(running_as, confirm_spawn, &m)) < 0) { |
8e274523 | 651 | log_error("Failed to allocate manager object: %s", strerror(-r)); |
60918275 LP |
652 | goto finish; |
653 | } | |
654 | ||
a16e1123 LP |
655 | if ((r = manager_startup(m, serialization, fds)) < 0) |
656 | log_error("Failed to fully startup daemon: %s", strerror(-r)); | |
657 | ||
658 | if (fds) { | |
659 | /* This will close all file descriptors that were opened, but | |
660 | * not claimed by any unit. */ | |
661 | ||
662 | fdset_free(fds); | |
663 | fds = NULL; | |
f50e0a01 LP |
664 | } |
665 | ||
a16e1123 LP |
666 | if (serialization) { |
667 | fclose(serialization); | |
668 | serialization = NULL; | |
669 | } else { | |
670 | log_debug("Activating default unit: %s", default_unit); | |
671 | ||
672 | if ((r = manager_load_unit(m, default_unit, NULL, &target)) < 0) { | |
673 | log_error("Failed to load default target: %s", strerror(-r)); | |
27b14a22 | 674 | |
a16e1123 LP |
675 | log_info("Trying to load rescue target..."); |
676 | if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &target)) < 0) { | |
677 | log_error("Failed to load rescue target: %s", strerror(-r)); | |
678 | goto finish; | |
679 | } | |
680 | } | |
37d88da7 | 681 | |
a16e1123 | 682 | if (action == ACTION_TEST) { |
40d50879 | 683 | printf("-> By units:\n"); |
a16e1123 LP |
684 | manager_dump_units(m, stdout, "\t"); |
685 | } | |
686 | ||
687 | if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) { | |
688 | log_error("Failed to start default target: %s", strerror(-r)); | |
37d88da7 LP |
689 | goto finish; |
690 | } | |
60918275 | 691 | |
a16e1123 | 692 | if (action == ACTION_TEST) { |
40d50879 | 693 | printf("-> By jobs:\n"); |
a16e1123 LP |
694 | manager_dump_jobs(m, stdout, "\t"); |
695 | retval = 0; | |
696 | goto finish; | |
697 | } | |
e965d56d | 698 | } |
d46de8a1 | 699 | |
a16e1123 LP |
700 | for (;;) { |
701 | if ((r = manager_loop(m)) < 0) { | |
702 | log_error("Failed to run mainloop: %s", strerror(-r)); | |
703 | goto finish; | |
704 | } | |
11dd41ce | 705 | |
a16e1123 | 706 | switch (m->exit_code) { |
e965d56d | 707 | |
a16e1123 LP |
708 | case MANAGER_EXIT: |
709 | retval = 0; | |
710 | log_debug("Exit."); | |
711 | goto finish; | |
e965d56d | 712 | |
a16e1123 LP |
713 | case MANAGER_RELOAD: |
714 | if ((r = manager_reload(m)) < 0) | |
715 | log_error("Failed to reload: %s", strerror(-r)); | |
716 | break; | |
cea8e32e | 717 | |
a16e1123 | 718 | case MANAGER_REEXECUTE: |
a16e1123 LP |
719 | if (prepare_reexecute(m, &serialization, &fds) < 0) |
720 | goto finish; | |
60918275 | 721 | |
a16e1123 LP |
722 | reexecute = true; |
723 | log_debug("Reexecuting."); | |
724 | goto finish; | |
725 | ||
726 | default: | |
727 | assert_not_reached("Unknown exit code."); | |
728 | } | |
729 | } | |
f170852a | 730 | |
60918275 LP |
731 | finish: |
732 | if (m) | |
733 | manager_free(m); | |
734 | ||
f170852a | 735 | free(default_unit); |
b9cd2ec1 | 736 | |
ea430986 LP |
737 | dbus_shutdown(); |
738 | ||
a16e1123 LP |
739 | if (reexecute) { |
740 | const char *args[11]; | |
741 | unsigned i = 0; | |
742 | char sfd[16]; | |
743 | ||
744 | assert(serialization); | |
745 | assert(fds); | |
746 | ||
747 | args[i++] = SYSTEMD_BINARY_PATH; | |
748 | ||
749 | args[i++] = "--log-level"; | |
750 | args[i++] = log_level_to_string(log_get_max_level()); | |
751 | ||
752 | args[i++] = "--log-target"; | |
753 | args[i++] = log_target_to_string(log_get_target()); | |
754 | ||
755 | args[i++] = "--running-as"; | |
756 | args[i++] = manager_running_as_to_string(running_as); | |
757 | ||
758 | snprintf(sfd, sizeof(sfd), "%i", fileno(serialization)); | |
759 | char_array_0(sfd); | |
760 | ||
761 | args[i++] = "--deserialize"; | |
762 | args[i++] = sfd; | |
763 | ||
764 | if (confirm_spawn) | |
765 | args[i++] = "--confirm-spawn"; | |
766 | ||
767 | args[i++] = NULL; | |
768 | ||
769 | assert(i <= ELEMENTSOF(args)); | |
770 | ||
771 | execv(args[0], (char* const*) args); | |
772 | ||
773 | log_error("Failed to reexecute: %m"); | |
774 | } | |
775 | ||
776 | if (serialization) | |
777 | fclose(serialization); | |
778 | ||
779 | if (fds) | |
780 | fdset_free(fds); | |
781 | ||
c3b3c274 LP |
782 | if (getpid() == 1) |
783 | freeze(); | |
784 | ||
60918275 LP |
785 | return retval; |
786 | } |