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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" |
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 | 47 | ACTION_TEST, |
4288f619 LP |
48 | ACTION_DUMP_CONFIGURATION_ITEMS, |
49 | ACTION_DONE | |
f170852a LP |
50 | } action = ACTION_RUN; |
51 | ||
52 | static char *default_unit = NULL; | |
a5dab5ce | 53 | static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID; |
4fc935ca | 54 | |
97c4f35c | 55 | static bool dump_core = true; |
601f6a1e LP |
56 | static bool crash_shell = false; |
57 | static int crash_chvt = -1; | |
80876c20 | 58 | static bool confirm_spawn = false; |
a16e1123 | 59 | static FILE* serialization = NULL; |
80876c20 | 60 | |
93a46b0b | 61 | _noreturn_ static void freeze(void) { |
97c4f35c LP |
62 | for (;;) |
63 | pause(); | |
64 | } | |
65 | ||
6f5e3f35 LP |
66 | static void nop_handler(int sig) { |
67 | } | |
68 | ||
93a46b0b | 69 | _noreturn_ static void crash(int sig) { |
97c4f35c LP |
70 | |
71 | if (!dump_core) | |
72 | log_error("Caught <%s>, not dumping core.", strsignal(sig)); | |
73 | else { | |
6f5e3f35 | 74 | struct sigaction sa; |
97c4f35c LP |
75 | pid_t pid; |
76 | ||
6f5e3f35 LP |
77 | /* We want to wait for the core process, hence let's enable SIGCHLD */ |
78 | zero(sa); | |
79 | sa.sa_handler = nop_handler; | |
80 | sa.sa_flags = SA_NOCLDSTOP|SA_RESTART; | |
81 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
82 | ||
97c4f35c | 83 | if ((pid = fork()) < 0) |
4fc935ca | 84 | log_error("Caught <%s>, cannot fork for core dump: %s", strsignal(sig), strerror(errno)); |
97c4f35c LP |
85 | |
86 | else if (pid == 0) { | |
97c4f35c LP |
87 | struct rlimit rl; |
88 | ||
89 | /* Enable default signal handler for core dump */ | |
90 | zero(sa); | |
91 | sa.sa_handler = SIG_DFL; | |
92 | assert_se(sigaction(sig, &sa, NULL) == 0); | |
93 | ||
94 | /* Don't limit the core dump size */ | |
95 | zero(rl); | |
96 | rl.rlim_cur = RLIM_INFINITY; | |
97 | rl.rlim_max = RLIM_INFINITY; | |
98 | setrlimit(RLIMIT_CORE, &rl); | |
99 | ||
100 | /* Just to be sure... */ | |
101 | assert_se(chdir("/") == 0); | |
102 | ||
103 | /* Raise the signal again */ | |
104 | raise(sig); | |
105 | ||
106 | assert_not_reached("We shouldn't be here..."); | |
107 | _exit(1); | |
4fc935ca LP |
108 | |
109 | } else { | |
110 | int status, r; | |
111 | ||
112 | /* Order things nicely. */ | |
113 | if ((r = waitpid(pid, &status, 0)) < 0) | |
114 | log_error("Caught <%s>, waitpid() failed: %s", strsignal(sig), strerror(errno)); | |
115 | else if (!WCOREDUMP(status)) | |
116 | log_error("Caught <%s>, core dump failed.", strsignal(sig)); | |
117 | else | |
118 | log_error("Caught <%s>, dumped core as pid %llu.", strsignal(sig), (unsigned long long) pid); | |
97c4f35c LP |
119 | } |
120 | } | |
121 | ||
601f6a1e LP |
122 | if (crash_chvt) |
123 | chvt(crash_chvt); | |
124 | ||
4fc935ca | 125 | if (crash_shell) { |
6f5e3f35 LP |
126 | struct sigaction sa; |
127 | pid_t pid; | |
8c43883a | 128 | |
4fc935ca LP |
129 | log_info("Executing crash shell in 10s..."); |
130 | sleep(10); | |
131 | ||
6f5e3f35 LP |
132 | /* Let the kernel reap children for us */ |
133 | zero(sa); | |
134 | sa.sa_handler = SIG_IGN; | |
135 | sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART; | |
136 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
8c43883a | 137 | |
6f5e3f35 LP |
138 | if ((pid = fork()) < 0) |
139 | log_error("Failed to fork off crash shell: %s", strerror(errno)); | |
140 | else if (pid == 0) { | |
843d2643 | 141 | int fd, r; |
ea5652c2 | 142 | |
21de3988 | 143 | if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0) |
ea5652c2 | 144 | log_error("Failed to acquire terminal: %s", strerror(-fd)); |
5b2a0903 | 145 | else if ((r = make_stdio(fd)) < 0) |
843d2643 | 146 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); |
ea5652c2 | 147 | |
6f5e3f35 LP |
148 | execl("/bin/sh", "/bin/sh", NULL); |
149 | ||
150 | log_error("execl() failed: %s", strerror(errno)); | |
151 | _exit(1); | |
152 | } | |
c99b188e | 153 | |
6f5e3f35 | 154 | log_info("Successfully spawned crash shall as pid %llu.", (unsigned long long) pid); |
4fc935ca LP |
155 | } |
156 | ||
157 | log_info("Freezing execution."); | |
97c4f35c LP |
158 | freeze(); |
159 | } | |
160 | ||
161 | static void install_crash_handler(void) { | |
162 | struct sigaction sa; | |
163 | ||
164 | zero(sa); | |
165 | ||
166 | sa.sa_handler = crash; | |
167 | sa.sa_flags = SA_NODEFER; | |
168 | ||
1b91d3e8 | 169 | sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1); |
97c4f35c | 170 | } |
f170852a | 171 | |
843d2643 LP |
172 | static int make_null_stdio(void) { |
173 | int null_fd, r; | |
80876c20 | 174 | |
c8513d54 | 175 | if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) { |
80876c20 | 176 | log_error("Failed to open /dev/null: %m"); |
843d2643 | 177 | return -errno; |
80876c20 LP |
178 | } |
179 | ||
843d2643 LP |
180 | if ((r = make_stdio(null_fd)) < 0) |
181 | log_warning("Failed to dup2() device: %s", strerror(-r)); | |
80876c20 | 182 | |
843d2643 LP |
183 | return r; |
184 | } | |
80876c20 | 185 | |
843d2643 LP |
186 | static int console_setup(bool do_reset) { |
187 | int tty_fd, r; | |
80876c20 | 188 | |
843d2643 LP |
189 | /* If we are init, we connect stdin/stdout/stderr to /dev/null |
190 | * and make sure we don't have a controlling tty. */ | |
80876c20 | 191 | |
843d2643 LP |
192 | release_terminal(); |
193 | ||
194 | if (!do_reset) | |
195 | return 0; | |
80876c20 | 196 | |
843d2643 LP |
197 | if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) { |
198 | log_error("Failed to open /dev/console: %s", strerror(-tty_fd)); | |
199 | return -tty_fd; | |
200 | } | |
80876c20 | 201 | |
843d2643 LP |
202 | if ((r = reset_terminal(tty_fd)) < 0) |
203 | log_error("Failed to reset /dev/console: %s", strerror(-r)); | |
204 | ||
205 | close_nointr_nofail(tty_fd); | |
80876c20 LP |
206 | return r; |
207 | } | |
208 | ||
f170852a LP |
209 | static int set_default_unit(const char *u) { |
210 | char *c; | |
211 | ||
212 | assert(u); | |
213 | ||
214 | if (!(c = strdup(u))) | |
215 | return -ENOMEM; | |
216 | ||
217 | free(default_unit); | |
218 | default_unit = c; | |
219 | return 0; | |
220 | } | |
221 | ||
222 | static int parse_proc_cmdline_word(const char *word) { | |
223 | ||
224 | static const char * const rlmap[] = { | |
225 | "single", SPECIAL_RUNLEVEL1_TARGET, | |
226 | "-s", SPECIAL_RUNLEVEL1_TARGET, | |
227 | "s", SPECIAL_RUNLEVEL1_TARGET, | |
228 | "S", SPECIAL_RUNLEVEL1_TARGET, | |
229 | "1", SPECIAL_RUNLEVEL1_TARGET, | |
230 | "2", SPECIAL_RUNLEVEL2_TARGET, | |
231 | "3", SPECIAL_RUNLEVEL3_TARGET, | |
232 | "4", SPECIAL_RUNLEVEL4_TARGET, | |
233 | "5", SPECIAL_RUNLEVEL5_TARGET | |
234 | }; | |
235 | ||
236 | if (startswith(word, "systemd.default=")) | |
82771ba1 | 237 | return set_default_unit(word + 16); |
f170852a LP |
238 | |
239 | else if (startswith(word, "systemd.log_target=")) { | |
240 | ||
241 | if (log_set_target_from_string(word + 19) < 0) | |
242 | log_warning("Failed to parse log target %s. Ignoring.", word + 19); | |
243 | ||
244 | } else if (startswith(word, "systemd.log_level=")) { | |
245 | ||
246 | if (log_set_max_level_from_string(word + 18) < 0) | |
247 | log_warning("Failed to parse log level %s. Ignoring.", word + 18); | |
248 | ||
4fc935ca LP |
249 | } else if (startswith(word, "systemd.dump_core=")) { |
250 | int r; | |
251 | ||
252 | if ((r = parse_boolean(word + 18)) < 0) | |
601f6a1e | 253 | log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18); |
4fc935ca LP |
254 | else |
255 | dump_core = r; | |
256 | ||
257 | } else if (startswith(word, "systemd.crash_shell=")) { | |
258 | int r; | |
259 | ||
260 | if ((r = parse_boolean(word + 20)) < 0) | |
601f6a1e | 261 | log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20); |
4fc935ca LP |
262 | else |
263 | crash_shell = r; | |
264 | ||
5e7ee61c LP |
265 | |
266 | } else if (startswith(word, "systemd.confirm_spawn=")) { | |
267 | int r; | |
268 | ||
269 | if ((r = parse_boolean(word + 22)) < 0) | |
270 | log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22); | |
271 | else | |
272 | confirm_spawn = r; | |
273 | ||
601f6a1e LP |
274 | } else if (startswith(word, "systemd.crash_chvt=")) { |
275 | int k; | |
276 | ||
277 | if (safe_atoi(word + 19, &k) < 0) | |
278 | log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19); | |
279 | else | |
280 | crash_chvt = k; | |
281 | ||
4fc935ca LP |
282 | } else if (startswith(word, "systemd.")) { |
283 | ||
284 | log_warning("Unknown kernel switch %s. Ignoring.", word); | |
285 | ||
286 | log_info("Supported kernel switches:"); | |
287 | log_info("systemd.default=UNIT Default unit to start"); | |
288 | log_info("systemd.log_target=console|kmsg|syslog Log target"); | |
289 | log_info("systemd.log_level=LEVEL Log level"); | |
290 | log_info("systemd.dump_core=0|1 Dump core on crash"); | |
291 | log_info("systemd.crash_shell=0|1 On crash run shell"); | |
601f6a1e | 292 | log_info("systemd.crash_chvt=N Change to VT #N on crash"); |
5e7ee61c | 293 | log_info("systemd.confirm_spawn=0|1 Confirm every process spawn"); |
4fc935ca | 294 | |
f170852a LP |
295 | } else { |
296 | unsigned i; | |
297 | ||
298 | /* SysV compatibility */ | |
f170852a LP |
299 | for (i = 0; i < ELEMENTSOF(rlmap); i += 2) |
300 | if (streq(word, rlmap[i])) | |
301 | return set_default_unit(rlmap[i+1]); | |
302 | } | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | static int parse_proc_cmdline(void) { | |
308 | char *line; | |
309 | int r; | |
310 | char *w; | |
311 | size_t l; | |
312 | char *state; | |
313 | ||
314 | if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { | |
315 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno)); | |
316 | return 0; | |
317 | } | |
318 | ||
319 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
320 | char *word; | |
321 | ||
322 | if (!(word = strndup(w, l))) { | |
323 | r = -ENOMEM; | |
324 | goto finish; | |
325 | } | |
326 | ||
327 | r = parse_proc_cmdline_word(word); | |
328 | free(word); | |
329 | ||
330 | if (r < 0) | |
331 | goto finish; | |
332 | } | |
333 | ||
334 | r = 0; | |
335 | ||
336 | finish: | |
337 | free(line); | |
338 | return r; | |
339 | } | |
340 | ||
341 | static int parse_argv(int argc, char *argv[]) { | |
342 | ||
343 | enum { | |
344 | ARG_LOG_LEVEL = 0x100, | |
345 | ARG_LOG_TARGET, | |
a5dab5ce | 346 | ARG_DEFAULT, |
e965d56d | 347 | ARG_RUNNING_AS, |
e537352b | 348 | ARG_TEST, |
80876c20 | 349 | ARG_DUMP_CONFIGURATION_ITEMS, |
a16e1123 | 350 | ARG_CONFIRM_SPAWN, |
4288f619 LP |
351 | ARG_DESERIALIZE, |
352 | ARG_INTROSPECT | |
f170852a LP |
353 | }; |
354 | ||
355 | static const struct option options[] = { | |
a16e1123 LP |
356 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, |
357 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
358 | { "default", required_argument, NULL, ARG_DEFAULT }, | |
359 | { "running-as", required_argument, NULL, ARG_RUNNING_AS }, | |
360 | { "test", no_argument, NULL, ARG_TEST }, | |
361 | { "help", no_argument, NULL, 'h' }, | |
362 | { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS }, | |
363 | { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN }, | |
364 | { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, | |
4288f619 | 365 | { "introspect", optional_argument, NULL, ARG_INTROSPECT }, |
a16e1123 | 366 | { NULL, 0, NULL, 0 } |
f170852a LP |
367 | }; |
368 | ||
369 | int c, r; | |
370 | ||
371 | assert(argc >= 1); | |
372 | assert(argv); | |
373 | ||
374 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
375 | ||
376 | switch (c) { | |
377 | ||
378 | case ARG_LOG_LEVEL: | |
379 | if ((r = log_set_max_level_from_string(optarg)) < 0) { | |
380 | log_error("Failed to parse log level %s.", optarg); | |
381 | return r; | |
382 | } | |
383 | ||
384 | break; | |
385 | ||
386 | case ARG_LOG_TARGET: | |
387 | ||
388 | if ((r = log_set_target_from_string(optarg)) < 0) { | |
389 | log_error("Failed to parse log target %s.", optarg); | |
390 | return r; | |
391 | } | |
392 | ||
393 | break; | |
394 | ||
395 | case ARG_DEFAULT: | |
396 | ||
397 | if ((r = set_default_unit(optarg)) < 0) { | |
398 | log_error("Failed to set default unit %s: %s", optarg, strerror(-r)); | |
399 | return r; | |
400 | } | |
401 | ||
402 | break; | |
403 | ||
a5dab5ce LP |
404 | case ARG_RUNNING_AS: { |
405 | ManagerRunningAs as; | |
406 | ||
407 | if ((as = manager_running_as_from_string(optarg)) < 0) { | |
408 | log_error("Failed to parse running as value %s", optarg); | |
409 | return -EINVAL; | |
410 | } | |
411 | ||
412 | running_as = as; | |
413 | break; | |
414 | } | |
415 | ||
e965d56d LP |
416 | case ARG_TEST: |
417 | action = ACTION_TEST; | |
418 | break; | |
419 | ||
e537352b LP |
420 | case ARG_DUMP_CONFIGURATION_ITEMS: |
421 | action = ACTION_DUMP_CONFIGURATION_ITEMS; | |
422 | break; | |
423 | ||
80876c20 LP |
424 | case ARG_CONFIRM_SPAWN: |
425 | confirm_spawn = true; | |
426 | break; | |
427 | ||
a16e1123 LP |
428 | case ARG_DESERIALIZE: { |
429 | int fd; | |
430 | FILE *f; | |
431 | ||
432 | if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) { | |
433 | log_error("Failed to parse deserialize option %s.", optarg); | |
434 | return r; | |
435 | } | |
436 | ||
437 | if (!(f = fdopen(fd, "r"))) { | |
438 | log_error("Failed to open serialization fd: %m"); | |
439 | return r; | |
440 | } | |
441 | ||
442 | if (serialization) | |
443 | fclose(serialization); | |
444 | ||
445 | serialization = f; | |
446 | ||
447 | break; | |
448 | } | |
449 | ||
4288f619 LP |
450 | case ARG_INTROSPECT: { |
451 | const char * const * i = NULL; | |
452 | ||
453 | for (i = bus_interface_table; *i; i += 2) | |
454 | if (!optarg || streq(i[0], optarg)) { | |
455 | fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE | |
456 | "<node>\n", stdout); | |
457 | fputs(i[1], stdout); | |
458 | fputs("</node>\n", stdout); | |
459 | ||
460 | if (optarg) | |
461 | break; | |
462 | } | |
463 | ||
464 | if (!i[0] && optarg) | |
465 | log_error("Unknown interface %s.", optarg); | |
466 | ||
467 | action = ACTION_DONE; | |
468 | break; | |
469 | } | |
470 | ||
f170852a LP |
471 | case 'h': |
472 | action = ACTION_HELP; | |
473 | break; | |
474 | ||
475 | case '?': | |
476 | return -EINVAL; | |
477 | ||
478 | default: | |
479 | log_error("Unknown option code %c", c); | |
480 | return -EINVAL; | |
481 | } | |
482 | ||
51f0e189 LP |
483 | /* PID 1 will get the kernel arguments as parameters, which we |
484 | * ignore and unconditionally read from | |
485 | * /proc/cmdline. However, we need to ignore those arguments | |
486 | * here. */ | |
487 | if (running_as != MANAGER_INIT && optind < argc) { | |
488 | log_error("Excess arguments."); | |
489 | return -EINVAL; | |
490 | } | |
491 | ||
f170852a LP |
492 | return 0; |
493 | } | |
494 | ||
495 | static int help(void) { | |
496 | ||
497 | printf("%s [options]\n\n" | |
e537352b LP |
498 | " -h --help Show this help\n" |
499 | " --default=UNIT Set default unit\n" | |
500 | " --log-level=LEVEL Set log level\n" | |
843d2643 | 501 | " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg)\n" |
e537352b LP |
502 | " --running-as=AS Set running as (init, system, session)\n" |
503 | " --test Determine startup sequence, dump it and exit\n" | |
80876c20 | 504 | " --dump-configuration-items Dump understood unit configuration items\n" |
4288f619 LP |
505 | " --confirm-spawn Ask for confirmation when spawning processes\n" |
506 | " --introspect[=INTERFACE] Extract D-Bus interface data\n", | |
f170852a LP |
507 | __progname); |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
a16e1123 LP |
512 | static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { |
513 | FILE *f = NULL; | |
514 | FDSet *fds = NULL; | |
515 | int r; | |
516 | ||
517 | assert(m); | |
518 | assert(_f); | |
519 | assert(_fds); | |
520 | ||
521 | if ((r = manager_open_serialization(&f)) < 0) { | |
522 | log_error("Failed to create serialization faile: %s", strerror(-r)); | |
523 | goto fail; | |
524 | } | |
525 | ||
526 | if (!(fds = fdset_new())) { | |
527 | r = -ENOMEM; | |
528 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
529 | goto fail; | |
530 | } | |
531 | ||
532 | if ((r = manager_serialize(m, f, fds)) < 0) { | |
533 | log_error("Failed to serialize state: %s", strerror(-r)); | |
534 | goto fail; | |
535 | } | |
536 | ||
537 | if (fseeko(f, 0, SEEK_SET) < 0) { | |
538 | log_error("Failed to rewind serialization fd: %m"); | |
539 | goto fail; | |
540 | } | |
541 | ||
542 | if ((r = fd_cloexec(fileno(f), false)) < 0) { | |
543 | log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r)); | |
544 | goto fail; | |
545 | } | |
546 | ||
547 | if ((r = fdset_cloexec(fds, false)) < 0) { | |
548 | log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r)); | |
549 | goto fail; | |
550 | } | |
551 | ||
552 | *_f = f; | |
553 | *_fds = fds; | |
554 | ||
555 | return 0; | |
556 | ||
557 | fail: | |
558 | fdset_free(fds); | |
559 | ||
560 | if (f) | |
561 | fclose(f); | |
562 | ||
563 | return r; | |
564 | } | |
565 | ||
60918275 LP |
566 | int main(int argc, char *argv[]) { |
567 | Manager *m = NULL; | |
87f0e418 | 568 | Unit *target = NULL; |
60918275 LP |
569 | Job *job = NULL; |
570 | int r, retval = 1; | |
a16e1123 LP |
571 | FDSet *fds = NULL; |
572 | bool reexecute = false; | |
27b14a22 | 573 | |
843d2643 | 574 | if (getpid() == 1) { |
a5dab5ce | 575 | running_as = MANAGER_INIT; |
843d2643 LP |
576 | log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); |
577 | } else | |
a5dab5ce LP |
578 | running_as = MANAGER_SESSION; |
579 | ||
f170852a LP |
580 | if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0) |
581 | goto finish; | |
60918275 | 582 | |
f170852a LP |
583 | /* Mount /proc, /sys and friends, so that /proc/cmdline and |
584 | * /proc/$PID/fd is available. */ | |
8efe3c01 LP |
585 | if (geteuid() == 0) |
586 | if (mount_setup() < 0) | |
587 | goto finish; | |
4ade7963 LP |
588 | |
589 | /* Reset all signal handlers. */ | |
590 | assert_se(reset_all_signal_handlers() == 0); | |
591 | ||
078e4539 | 592 | /* If we are init, we can block sigkill. Yay. */ |
9a34ec5f | 593 | ignore_signals(SIGNALS_IGNORE, -1); |
078e4539 | 594 | |
a5dab5ce LP |
595 | if (running_as != MANAGER_SESSION) |
596 | if (parse_proc_cmdline() < 0) | |
597 | goto finish; | |
f170852a LP |
598 | |
599 | log_parse_environment(); | |
600 | ||
601 | if (parse_argv(argc, argv) < 0) | |
602 | goto finish; | |
603 | ||
604 | if (action == ACTION_HELP) { | |
605 | retval = help(); | |
606 | goto finish; | |
e537352b LP |
607 | } else if (action == ACTION_DUMP_CONFIGURATION_ITEMS) { |
608 | unit_dump_config_items(stdout); | |
609 | retval = 0; | |
610 | goto finish; | |
4288f619 LP |
611 | } else if (action == ACTION_DONE) { |
612 | retval = 0; | |
613 | goto finish; | |
f170852a LP |
614 | } |
615 | ||
e965d56d | 616 | assert_se(action == ACTION_RUN || action == ACTION_TEST); |
f170852a | 617 | |
a16e1123 LP |
618 | /* Remember open file descriptors for later deserialization */ |
619 | if (serialization) { | |
620 | if ((r = fdset_new_fill(&fds)) < 0) { | |
621 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
622 | goto finish; | |
623 | } | |
624 | ||
625 | assert_se(fdset_remove(fds, fileno(serialization)) >= 0); | |
626 | } else | |
627 | close_all_fds(NULL, 0); | |
628 | ||
09082a94 | 629 | /* Set up PATH unless it is already set */ |
e537352b LP |
630 | setenv("PATH", |
631 | "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", | |
632 | running_as == MANAGER_INIT); | |
09082a94 | 633 | |
f170852a LP |
634 | /* Move out of the way, so that we won't block unmounts */ |
635 | assert_se(chdir("/") == 0); | |
636 | ||
80876c20 LP |
637 | if (running_as != MANAGER_SESSION) { |
638 | /* Become a session leader if we aren't one yet. */ | |
639 | setsid(); | |
4ade7963 | 640 | |
80876c20 LP |
641 | /* Disable the umask logic */ |
642 | umask(0); | |
643 | } | |
644 | ||
843d2643 LP |
645 | /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */ |
646 | dbus_connection_set_change_sigpipe(FALSE); | |
647 | ||
2146621b LP |
648 | /* Reset the console, but only if this is really init and we |
649 | * are freshly booted */ | |
843d2643 | 650 | if (running_as != MANAGER_SESSION && action == ACTION_RUN) { |
2146621b | 651 | console_setup(getpid() == 1 && !serialization); |
843d2643 LP |
652 | make_null_stdio(); |
653 | } | |
4ade7963 | 654 | |
18149b9f | 655 | /* Open the logging devices, if possible and necessary */ |
843d2643 | 656 | log_open(); |
4ade7963 | 657 | |
5373d602 LP |
658 | /* Make sure we leave a core dump without panicing the |
659 | * kernel. */ | |
4fc935ca LP |
660 | if (getpid() == 1) |
661 | install_crash_handler(); | |
97c4f35c | 662 | |
a5dab5ce LP |
663 | log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as)); |
664 | ||
af5bc85d | 665 | if (running_as == MANAGER_INIT) { |
11c3a4ee | 666 | kmod_setup(); |
e537352b | 667 | hostname_setup(); |
af5bc85d LP |
668 | loopback_setup(); |
669 | } | |
302e8c4c | 670 | |
80876c20 | 671 | if ((r = manager_new(running_as, confirm_spawn, &m)) < 0) { |
8e274523 | 672 | log_error("Failed to allocate manager object: %s", strerror(-r)); |
60918275 LP |
673 | goto finish; |
674 | } | |
675 | ||
a16e1123 | 676 | if ((r = manager_startup(m, serialization, fds)) < 0) |
6e2ef85b | 677 | log_error("Failed to fully start up daemon: %s", strerror(-r)); |
a16e1123 LP |
678 | |
679 | if (fds) { | |
680 | /* This will close all file descriptors that were opened, but | |
681 | * not claimed by any unit. */ | |
682 | ||
683 | fdset_free(fds); | |
684 | fds = NULL; | |
f50e0a01 LP |
685 | } |
686 | ||
a16e1123 LP |
687 | if (serialization) { |
688 | fclose(serialization); | |
689 | serialization = NULL; | |
690 | } else { | |
691 | log_debug("Activating default unit: %s", default_unit); | |
692 | ||
693 | if ((r = manager_load_unit(m, default_unit, NULL, &target)) < 0) { | |
694 | log_error("Failed to load default target: %s", strerror(-r)); | |
27b14a22 | 695 | |
a16e1123 LP |
696 | log_info("Trying to load rescue target..."); |
697 | if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &target)) < 0) { | |
698 | log_error("Failed to load rescue target: %s", strerror(-r)); | |
699 | goto finish; | |
700 | } | |
701 | } | |
37d88da7 | 702 | |
a16e1123 | 703 | if (action == ACTION_TEST) { |
40d50879 | 704 | printf("-> By units:\n"); |
a16e1123 LP |
705 | manager_dump_units(m, stdout, "\t"); |
706 | } | |
707 | ||
708 | if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) { | |
709 | log_error("Failed to start default target: %s", strerror(-r)); | |
37d88da7 LP |
710 | goto finish; |
711 | } | |
60918275 | 712 | |
a16e1123 | 713 | if (action == ACTION_TEST) { |
40d50879 | 714 | printf("-> By jobs:\n"); |
a16e1123 LP |
715 | manager_dump_jobs(m, stdout, "\t"); |
716 | retval = 0; | |
717 | goto finish; | |
718 | } | |
e965d56d | 719 | } |
d46de8a1 | 720 | |
a16e1123 LP |
721 | for (;;) { |
722 | if ((r = manager_loop(m)) < 0) { | |
723 | log_error("Failed to run mainloop: %s", strerror(-r)); | |
724 | goto finish; | |
725 | } | |
11dd41ce | 726 | |
a16e1123 | 727 | switch (m->exit_code) { |
e965d56d | 728 | |
a16e1123 LP |
729 | case MANAGER_EXIT: |
730 | retval = 0; | |
731 | log_debug("Exit."); | |
732 | goto finish; | |
e965d56d | 733 | |
a16e1123 LP |
734 | case MANAGER_RELOAD: |
735 | if ((r = manager_reload(m)) < 0) | |
736 | log_error("Failed to reload: %s", strerror(-r)); | |
737 | break; | |
cea8e32e | 738 | |
a16e1123 | 739 | case MANAGER_REEXECUTE: |
a16e1123 LP |
740 | if (prepare_reexecute(m, &serialization, &fds) < 0) |
741 | goto finish; | |
60918275 | 742 | |
a16e1123 LP |
743 | reexecute = true; |
744 | log_debug("Reexecuting."); | |
745 | goto finish; | |
746 | ||
747 | default: | |
748 | assert_not_reached("Unknown exit code."); | |
749 | } | |
750 | } | |
f170852a | 751 | |
60918275 LP |
752 | finish: |
753 | if (m) | |
754 | manager_free(m); | |
755 | ||
f170852a | 756 | free(default_unit); |
b9cd2ec1 | 757 | |
ea430986 LP |
758 | dbus_shutdown(); |
759 | ||
a16e1123 LP |
760 | if (reexecute) { |
761 | const char *args[11]; | |
762 | unsigned i = 0; | |
763 | char sfd[16]; | |
764 | ||
765 | assert(serialization); | |
766 | assert(fds); | |
767 | ||
768 | args[i++] = SYSTEMD_BINARY_PATH; | |
769 | ||
770 | args[i++] = "--log-level"; | |
771 | args[i++] = log_level_to_string(log_get_max_level()); | |
772 | ||
773 | args[i++] = "--log-target"; | |
774 | args[i++] = log_target_to_string(log_get_target()); | |
775 | ||
776 | args[i++] = "--running-as"; | |
777 | args[i++] = manager_running_as_to_string(running_as); | |
778 | ||
779 | snprintf(sfd, sizeof(sfd), "%i", fileno(serialization)); | |
780 | char_array_0(sfd); | |
781 | ||
782 | args[i++] = "--deserialize"; | |
783 | args[i++] = sfd; | |
784 | ||
785 | if (confirm_spawn) | |
786 | args[i++] = "--confirm-spawn"; | |
787 | ||
788 | args[i++] = NULL; | |
789 | ||
790 | assert(i <= ELEMENTSOF(args)); | |
791 | ||
792 | execv(args[0], (char* const*) args); | |
793 | ||
794 | log_error("Failed to reexecute: %m"); | |
795 | } | |
796 | ||
797 | if (serialization) | |
798 | fclose(serialization); | |
799 | ||
800 | if (fds) | |
801 | fdset_free(fds); | |
802 | ||
c3b3c274 LP |
803 | if (getpid() == 1) |
804 | freeze(); | |
805 | ||
60918275 LP |
806 | return retval; |
807 | } |