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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" |
fa0f4d8a | 41 | #include "modprobe-setup.h" |
302e8c4c | 42 | #include "load-fragment.h" |
a16e1123 | 43 | #include "fdset.h" |
514f4ef5 | 44 | #include "special.h" |
60918275 | 45 | |
f170852a LP |
46 | static enum { |
47 | ACTION_RUN, | |
e965d56d | 48 | ACTION_HELP, |
e537352b | 49 | ACTION_TEST, |
4288f619 LP |
50 | ACTION_DUMP_CONFIGURATION_ITEMS, |
51 | ACTION_DONE | |
fa0f4d8a | 52 | } arg_action = ACTION_RUN; |
f170852a | 53 | |
fa0f4d8a LP |
54 | static char *arg_default_unit = NULL; |
55 | static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID; | |
56 | ||
57 | static bool arg_dump_core = true; | |
58 | static bool arg_crash_shell = false; | |
59 | static int arg_crash_chvt = -1; | |
60 | static bool arg_confirm_spawn = false; | |
61 | static bool arg_nomodules = false; | |
9e58ff9c | 62 | static bool arg_show_status = true; |
4fc935ca | 63 | |
a16e1123 | 64 | static FILE* serialization = NULL; |
80876c20 | 65 | |
93a46b0b | 66 | _noreturn_ static void freeze(void) { |
97c4f35c LP |
67 | for (;;) |
68 | pause(); | |
69 | } | |
70 | ||
6f5e3f35 LP |
71 | static void nop_handler(int sig) { |
72 | } | |
73 | ||
93a46b0b | 74 | _noreturn_ static void crash(int sig) { |
97c4f35c | 75 | |
fa0f4d8a | 76 | if (!arg_dump_core) |
97c4f35c LP |
77 | log_error("Caught <%s>, not dumping core.", strsignal(sig)); |
78 | else { | |
6f5e3f35 | 79 | struct sigaction sa; |
97c4f35c LP |
80 | pid_t pid; |
81 | ||
6f5e3f35 LP |
82 | /* We want to wait for the core process, hence let's enable SIGCHLD */ |
83 | zero(sa); | |
84 | sa.sa_handler = nop_handler; | |
85 | sa.sa_flags = SA_NOCLDSTOP|SA_RESTART; | |
86 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
87 | ||
97c4f35c | 88 | if ((pid = fork()) < 0) |
4fc935ca | 89 | log_error("Caught <%s>, cannot fork for core dump: %s", strsignal(sig), strerror(errno)); |
97c4f35c LP |
90 | |
91 | else if (pid == 0) { | |
97c4f35c LP |
92 | struct rlimit rl; |
93 | ||
94 | /* Enable default signal handler for core dump */ | |
95 | zero(sa); | |
96 | sa.sa_handler = SIG_DFL; | |
97 | assert_se(sigaction(sig, &sa, NULL) == 0); | |
98 | ||
99 | /* Don't limit the core dump size */ | |
100 | zero(rl); | |
101 | rl.rlim_cur = RLIM_INFINITY; | |
102 | rl.rlim_max = RLIM_INFINITY; | |
103 | setrlimit(RLIMIT_CORE, &rl); | |
104 | ||
105 | /* Just to be sure... */ | |
106 | assert_se(chdir("/") == 0); | |
107 | ||
108 | /* Raise the signal again */ | |
109 | raise(sig); | |
110 | ||
111 | assert_not_reached("We shouldn't be here..."); | |
112 | _exit(1); | |
4fc935ca LP |
113 | |
114 | } else { | |
115 | int status, r; | |
116 | ||
117 | /* Order things nicely. */ | |
118 | if ((r = waitpid(pid, &status, 0)) < 0) | |
119 | log_error("Caught <%s>, waitpid() failed: %s", strsignal(sig), strerror(errno)); | |
120 | else if (!WCOREDUMP(status)) | |
121 | log_error("Caught <%s>, core dump failed.", strsignal(sig)); | |
122 | else | |
bb00e604 | 123 | log_error("Caught <%s>, dumped core as pid %lu.", strsignal(sig), (unsigned long) pid); |
97c4f35c LP |
124 | } |
125 | } | |
126 | ||
fa0f4d8a LP |
127 | if (arg_crash_chvt) |
128 | chvt(arg_crash_chvt); | |
601f6a1e | 129 | |
fa0f4d8a | 130 | if (arg_crash_shell) { |
6f5e3f35 LP |
131 | struct sigaction sa; |
132 | pid_t pid; | |
8c43883a | 133 | |
4fc935ca LP |
134 | log_info("Executing crash shell in 10s..."); |
135 | sleep(10); | |
136 | ||
6f5e3f35 LP |
137 | /* Let the kernel reap children for us */ |
138 | zero(sa); | |
139 | sa.sa_handler = SIG_IGN; | |
140 | sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART; | |
141 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
8c43883a | 142 | |
6f5e3f35 LP |
143 | if ((pid = fork()) < 0) |
144 | log_error("Failed to fork off crash shell: %s", strerror(errno)); | |
145 | else if (pid == 0) { | |
843d2643 | 146 | int fd, r; |
ea5652c2 | 147 | |
21de3988 | 148 | if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0) |
ea5652c2 | 149 | log_error("Failed to acquire terminal: %s", strerror(-fd)); |
5b2a0903 | 150 | else if ((r = make_stdio(fd)) < 0) |
843d2643 | 151 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); |
ea5652c2 | 152 | |
6f5e3f35 LP |
153 | execl("/bin/sh", "/bin/sh", NULL); |
154 | ||
155 | log_error("execl() failed: %s", strerror(errno)); | |
156 | _exit(1); | |
157 | } | |
c99b188e | 158 | |
bb00e604 | 159 | log_info("Successfully spawned crash shall as pid %lu.", (unsigned long) pid); |
4fc935ca LP |
160 | } |
161 | ||
162 | log_info("Freezing execution."); | |
97c4f35c LP |
163 | freeze(); |
164 | } | |
165 | ||
166 | static void install_crash_handler(void) { | |
167 | struct sigaction sa; | |
168 | ||
169 | zero(sa); | |
170 | ||
171 | sa.sa_handler = crash; | |
172 | sa.sa_flags = SA_NODEFER; | |
173 | ||
1b91d3e8 | 174 | sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1); |
97c4f35c | 175 | } |
f170852a | 176 | |
843d2643 LP |
177 | static int make_null_stdio(void) { |
178 | int null_fd, r; | |
80876c20 | 179 | |
c8513d54 | 180 | if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) { |
80876c20 | 181 | log_error("Failed to open /dev/null: %m"); |
843d2643 | 182 | return -errno; |
80876c20 LP |
183 | } |
184 | ||
843d2643 LP |
185 | if ((r = make_stdio(null_fd)) < 0) |
186 | log_warning("Failed to dup2() device: %s", strerror(-r)); | |
80876c20 | 187 | |
843d2643 LP |
188 | return r; |
189 | } | |
80876c20 | 190 | |
843d2643 LP |
191 | static int console_setup(bool do_reset) { |
192 | int tty_fd, r; | |
80876c20 | 193 | |
843d2643 LP |
194 | /* If we are init, we connect stdin/stdout/stderr to /dev/null |
195 | * and make sure we don't have a controlling tty. */ | |
80876c20 | 196 | |
843d2643 LP |
197 | release_terminal(); |
198 | ||
199 | if (!do_reset) | |
200 | return 0; | |
80876c20 | 201 | |
843d2643 LP |
202 | if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) { |
203 | log_error("Failed to open /dev/console: %s", strerror(-tty_fd)); | |
204 | return -tty_fd; | |
205 | } | |
80876c20 | 206 | |
843d2643 LP |
207 | if ((r = reset_terminal(tty_fd)) < 0) |
208 | log_error("Failed to reset /dev/console: %s", strerror(-r)); | |
209 | ||
210 | close_nointr_nofail(tty_fd); | |
80876c20 LP |
211 | return r; |
212 | } | |
213 | ||
f170852a LP |
214 | static int set_default_unit(const char *u) { |
215 | char *c; | |
216 | ||
217 | assert(u); | |
218 | ||
219 | if (!(c = strdup(u))) | |
220 | return -ENOMEM; | |
221 | ||
fa0f4d8a LP |
222 | free(arg_default_unit); |
223 | arg_default_unit = c; | |
f170852a LP |
224 | return 0; |
225 | } | |
226 | ||
227 | static int parse_proc_cmdline_word(const char *word) { | |
228 | ||
229 | static const char * const rlmap[] = { | |
514f4ef5 LP |
230 | "single", SPECIAL_RESCUE_TARGET, |
231 | "-s", SPECIAL_RESCUE_TARGET, | |
232 | "s", SPECIAL_RESCUE_TARGET, | |
233 | "S", SPECIAL_RESCUE_TARGET, | |
234 | "1", SPECIAL_RESCUE_TARGET, | |
f170852a LP |
235 | "2", SPECIAL_RUNLEVEL2_TARGET, |
236 | "3", SPECIAL_RUNLEVEL3_TARGET, | |
237 | "4", SPECIAL_RUNLEVEL4_TARGET, | |
238 | "5", SPECIAL_RUNLEVEL5_TARGET | |
239 | }; | |
9e58ff9c | 240 | bool ignore_quiet = false; |
f170852a | 241 | |
2f198e2f LP |
242 | if (startswith(word, "systemd.unit=")) |
243 | return set_default_unit(word + 13); | |
f170852a LP |
244 | |
245 | else if (startswith(word, "systemd.log_target=")) { | |
246 | ||
247 | if (log_set_target_from_string(word + 19) < 0) | |
248 | log_warning("Failed to parse log target %s. Ignoring.", word + 19); | |
249 | ||
250 | } else if (startswith(word, "systemd.log_level=")) { | |
251 | ||
252 | if (log_set_max_level_from_string(word + 18) < 0) | |
253 | log_warning("Failed to parse log level %s. Ignoring.", word + 18); | |
254 | ||
bbe63281 LP |
255 | } else if (startswith(word, "systemd.log_color=")) { |
256 | ||
257 | if (log_show_color_from_string(word + 18) < 0) | |
258 | log_warning("Failed to parse log color setting %s. Ignoring.", word + 18); | |
259 | ||
260 | } else if (startswith(word, "systemd.log_location=")) { | |
261 | ||
262 | if (log_show_location_from_string(word + 21) < 0) | |
263 | log_warning("Failed to parse log location setting %s. Ignoring.", word + 21); | |
264 | ||
4fc935ca LP |
265 | } else if (startswith(word, "systemd.dump_core=")) { |
266 | int r; | |
267 | ||
268 | if ((r = parse_boolean(word + 18)) < 0) | |
601f6a1e | 269 | log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18); |
4fc935ca | 270 | else |
fa0f4d8a | 271 | arg_dump_core = r; |
4fc935ca LP |
272 | |
273 | } else if (startswith(word, "systemd.crash_shell=")) { | |
274 | int r; | |
275 | ||
276 | if ((r = parse_boolean(word + 20)) < 0) | |
601f6a1e | 277 | log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20); |
4fc935ca | 278 | else |
fa0f4d8a | 279 | arg_crash_shell = r; |
5e7ee61c LP |
280 | |
281 | } else if (startswith(word, "systemd.confirm_spawn=")) { | |
282 | int r; | |
283 | ||
284 | if ((r = parse_boolean(word + 22)) < 0) | |
285 | log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22); | |
286 | else | |
fa0f4d8a | 287 | arg_confirm_spawn = r; |
5e7ee61c | 288 | |
601f6a1e LP |
289 | } else if (startswith(word, "systemd.crash_chvt=")) { |
290 | int k; | |
291 | ||
292 | if (safe_atoi(word + 19, &k) < 0) | |
293 | log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19); | |
294 | else | |
fa0f4d8a | 295 | arg_crash_chvt = k; |
601f6a1e | 296 | |
9e58ff9c LP |
297 | } else if (startswith(word, "systemd.show_status=")) { |
298 | int r; | |
299 | ||
300 | if ((r = parse_boolean(word + 20)) < 0) | |
301 | log_warning("Failed to parse show status switch %s, Ignoring.", word + 20); | |
302 | else { | |
303 | arg_show_status = r; | |
304 | ignore_quiet = true; | |
305 | } | |
306 | ||
4fc935ca LP |
307 | } else if (startswith(word, "systemd.")) { |
308 | ||
309 | log_warning("Unknown kernel switch %s. Ignoring.", word); | |
310 | ||
bbe63281 LP |
311 | log_info("Supported kernel switches:\n" |
312 | "systemd.unit=UNIT Default unit to start\n" | |
313 | "systemd.log_target=console|kmsg|syslog| Log target\n" | |
314 | " syslog-org-kmsg|null\n" | |
315 | "systemd.log_level=LEVEL Log level\n" | |
316 | "systemd.log_color=0|1 Highlight important log messages\n" | |
317 | "systemd.log_location=0|1 Include code location in log messages\n" | |
318 | "systemd.dump_core=0|1 Dump core on crash\n" | |
9e58ff9c | 319 | "systemd.crash_shell=0|1 Run shell on crash\n" |
bbe63281 | 320 | "systemd.crash_chvt=N Change to VT #N on crash\n" |
9e58ff9c LP |
321 | "systemd.confirm_spawn=0|1 Confirm every process spawn\n" |
322 | "systemd.show_status=0|1 Show status updates on the console during bootup\n"); | |
4fc935ca | 323 | |
fa0f4d8a LP |
324 | } else if (streq(word, "nomodules")) |
325 | arg_nomodules = true; | |
9e58ff9c LP |
326 | else if (streq(word, "quiet")) { |
327 | if (!ignore_quiet) | |
328 | arg_show_status = false; | |
329 | } else { | |
f170852a LP |
330 | unsigned i; |
331 | ||
332 | /* SysV compatibility */ | |
f170852a LP |
333 | for (i = 0; i < ELEMENTSOF(rlmap); i += 2) |
334 | if (streq(word, rlmap[i])) | |
335 | return set_default_unit(rlmap[i+1]); | |
336 | } | |
337 | ||
338 | return 0; | |
339 | } | |
340 | ||
341 | static int parse_proc_cmdline(void) { | |
342 | char *line; | |
343 | int r; | |
344 | char *w; | |
345 | size_t l; | |
346 | char *state; | |
347 | ||
348 | if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { | |
349 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno)); | |
350 | return 0; | |
351 | } | |
352 | ||
353 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
354 | char *word; | |
355 | ||
356 | if (!(word = strndup(w, l))) { | |
357 | r = -ENOMEM; | |
358 | goto finish; | |
359 | } | |
360 | ||
361 | r = parse_proc_cmdline_word(word); | |
362 | free(word); | |
363 | ||
364 | if (r < 0) | |
365 | goto finish; | |
366 | } | |
367 | ||
368 | r = 0; | |
369 | ||
370 | finish: | |
371 | free(line); | |
372 | return r; | |
373 | } | |
374 | ||
375 | static int parse_argv(int argc, char *argv[]) { | |
376 | ||
377 | enum { | |
378 | ARG_LOG_LEVEL = 0x100, | |
379 | ARG_LOG_TARGET, | |
bbe63281 LP |
380 | ARG_LOG_COLOR, |
381 | ARG_LOG_LOCATION, | |
2f198e2f | 382 | ARG_UNIT, |
e965d56d | 383 | ARG_RUNNING_AS, |
e537352b | 384 | ARG_TEST, |
80876c20 | 385 | ARG_DUMP_CONFIGURATION_ITEMS, |
9e58ff9c LP |
386 | ARG_DUMP_CORE, |
387 | ARG_CRASH_SHELL, | |
a16e1123 | 388 | ARG_CONFIRM_SPAWN, |
9e58ff9c | 389 | ARG_SHOW_STATUS, |
4288f619 LP |
390 | ARG_DESERIALIZE, |
391 | ARG_INTROSPECT | |
f170852a LP |
392 | }; |
393 | ||
394 | static const struct option options[] = { | |
a16e1123 LP |
395 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, |
396 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
bbe63281 LP |
397 | { "log-color", optional_argument, NULL, ARG_LOG_COLOR }, |
398 | { "log-location", optional_argument, NULL, ARG_LOG_LOCATION }, | |
2f198e2f | 399 | { "unit", required_argument, NULL, ARG_UNIT }, |
a16e1123 LP |
400 | { "running-as", required_argument, NULL, ARG_RUNNING_AS }, |
401 | { "test", no_argument, NULL, ARG_TEST }, | |
402 | { "help", no_argument, NULL, 'h' }, | |
403 | { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS }, | |
9e58ff9c LP |
404 | { "dump-core", no_argument, NULL, ARG_DUMP_CORE }, |
405 | { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL }, | |
a16e1123 | 406 | { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN }, |
9e58ff9c | 407 | { "show-status", no_argument, NULL, ARG_SHOW_STATUS }, |
a16e1123 | 408 | { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, |
4288f619 | 409 | { "introspect", optional_argument, NULL, ARG_INTROSPECT }, |
a16e1123 | 410 | { NULL, 0, NULL, 0 } |
f170852a LP |
411 | }; |
412 | ||
413 | int c, r; | |
414 | ||
415 | assert(argc >= 1); | |
416 | assert(argv); | |
417 | ||
418 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
419 | ||
420 | switch (c) { | |
421 | ||
422 | case ARG_LOG_LEVEL: | |
423 | if ((r = log_set_max_level_from_string(optarg)) < 0) { | |
424 | log_error("Failed to parse log level %s.", optarg); | |
425 | return r; | |
426 | } | |
427 | ||
428 | break; | |
429 | ||
430 | case ARG_LOG_TARGET: | |
431 | ||
432 | if ((r = log_set_target_from_string(optarg)) < 0) { | |
433 | log_error("Failed to parse log target %s.", optarg); | |
434 | return r; | |
435 | } | |
436 | ||
437 | break; | |
438 | ||
bbe63281 LP |
439 | case ARG_LOG_COLOR: |
440 | ||
d0b170c8 LP |
441 | if (optarg) { |
442 | if ((r = log_show_color_from_string(optarg)) < 0) { | |
443 | log_error("Failed to parse log color setting %s.", optarg); | |
444 | return r; | |
445 | } | |
446 | } else | |
447 | log_show_color(true); | |
bbe63281 LP |
448 | |
449 | break; | |
450 | ||
451 | case ARG_LOG_LOCATION: | |
452 | ||
d0b170c8 LP |
453 | if (optarg) { |
454 | if ((r = log_show_location_from_string(optarg)) < 0) { | |
455 | log_error("Failed to parse log location setting %s.", optarg); | |
456 | return r; | |
457 | } | |
458 | } else | |
459 | log_show_location(true); | |
bbe63281 LP |
460 | |
461 | break; | |
462 | ||
2f198e2f | 463 | case ARG_UNIT: |
f170852a LP |
464 | |
465 | if ((r = set_default_unit(optarg)) < 0) { | |
466 | log_error("Failed to set default unit %s: %s", optarg, strerror(-r)); | |
467 | return r; | |
468 | } | |
469 | ||
470 | break; | |
471 | ||
a5dab5ce LP |
472 | case ARG_RUNNING_AS: { |
473 | ManagerRunningAs as; | |
474 | ||
475 | if ((as = manager_running_as_from_string(optarg)) < 0) { | |
476 | log_error("Failed to parse running as value %s", optarg); | |
477 | return -EINVAL; | |
478 | } | |
479 | ||
fa0f4d8a | 480 | arg_running_as = as; |
a5dab5ce LP |
481 | break; |
482 | } | |
483 | ||
e965d56d | 484 | case ARG_TEST: |
fa0f4d8a | 485 | arg_action = ACTION_TEST; |
e965d56d LP |
486 | break; |
487 | ||
e537352b | 488 | case ARG_DUMP_CONFIGURATION_ITEMS: |
fa0f4d8a | 489 | arg_action = ACTION_DUMP_CONFIGURATION_ITEMS; |
e537352b LP |
490 | break; |
491 | ||
9e58ff9c LP |
492 | case ARG_DUMP_CORE: |
493 | arg_dump_core = true; | |
494 | break; | |
495 | ||
496 | case ARG_CRASH_SHELL: | |
497 | arg_crash_shell = true; | |
498 | break; | |
499 | ||
80876c20 | 500 | case ARG_CONFIRM_SPAWN: |
fa0f4d8a | 501 | arg_confirm_spawn = true; |
80876c20 LP |
502 | break; |
503 | ||
9e58ff9c LP |
504 | case ARG_SHOW_STATUS: |
505 | arg_show_status = true; | |
506 | break; | |
507 | ||
a16e1123 LP |
508 | case ARG_DESERIALIZE: { |
509 | int fd; | |
510 | FILE *f; | |
511 | ||
512 | if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) { | |
513 | log_error("Failed to parse deserialize option %s.", optarg); | |
514 | return r; | |
515 | } | |
516 | ||
517 | if (!(f = fdopen(fd, "r"))) { | |
518 | log_error("Failed to open serialization fd: %m"); | |
519 | return r; | |
520 | } | |
521 | ||
522 | if (serialization) | |
523 | fclose(serialization); | |
524 | ||
525 | serialization = f; | |
526 | ||
527 | break; | |
528 | } | |
529 | ||
4288f619 LP |
530 | case ARG_INTROSPECT: { |
531 | const char * const * i = NULL; | |
532 | ||
533 | for (i = bus_interface_table; *i; i += 2) | |
534 | if (!optarg || streq(i[0], optarg)) { | |
535 | fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE | |
536 | "<node>\n", stdout); | |
537 | fputs(i[1], stdout); | |
538 | fputs("</node>\n", stdout); | |
539 | ||
540 | if (optarg) | |
541 | break; | |
542 | } | |
543 | ||
544 | if (!i[0] && optarg) | |
545 | log_error("Unknown interface %s.", optarg); | |
546 | ||
fa0f4d8a | 547 | arg_action = ACTION_DONE; |
4288f619 LP |
548 | break; |
549 | } | |
550 | ||
f170852a | 551 | case 'h': |
fa0f4d8a | 552 | arg_action = ACTION_HELP; |
f170852a LP |
553 | break; |
554 | ||
555 | case '?': | |
556 | return -EINVAL; | |
557 | ||
558 | default: | |
559 | log_error("Unknown option code %c", c); | |
560 | return -EINVAL; | |
561 | } | |
562 | ||
51f0e189 LP |
563 | /* PID 1 will get the kernel arguments as parameters, which we |
564 | * ignore and unconditionally read from | |
565 | * /proc/cmdline. However, we need to ignore those arguments | |
566 | * here. */ | |
fa0f4d8a | 567 | if (arg_running_as != MANAGER_SYSTEM && optind < argc) { |
51f0e189 LP |
568 | log_error("Excess arguments."); |
569 | return -EINVAL; | |
570 | } | |
571 | ||
f170852a LP |
572 | return 0; |
573 | } | |
574 | ||
575 | static int help(void) { | |
576 | ||
2e33c433 | 577 | printf("%s [OPTIONS...]\n\n" |
bbe63281 | 578 | "Starts up and maintains the system or a session.\n\n" |
e537352b | 579 | " -h --help Show this help\n" |
e537352b | 580 | " --test Determine startup sequence, dump it and exit\n" |
80876c20 | 581 | " --dump-configuration-items Dump understood unit configuration items\n" |
bbe63281 | 582 | " --introspect[=INTERFACE] Extract D-Bus interface data\n" |
9e58ff9c LP |
583 | " --unit=UNIT Set default unit\n" |
584 | " --running-as=AS Set running as (system, session)\n" | |
585 | " --dump-core Dump core on crash\n" | |
586 | " --crash-shell Run shell on crash\n" | |
587 | " --confirm-spawn Ask for confirmation when spawning processes\n" | |
588 | " --show-status Show status updates on the console during bootup\n" | |
bbe63281 | 589 | " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n" |
9e58ff9c | 590 | " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n" |
2218198b | 591 | " --log-color[=0|1] Highlight important log messages\n" |
bbe63281 | 592 | " --log-location[=0|1] Include code location in log messages\n", |
5b6319dc | 593 | program_invocation_short_name); |
f170852a LP |
594 | |
595 | return 0; | |
596 | } | |
597 | ||
a16e1123 LP |
598 | static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { |
599 | FILE *f = NULL; | |
600 | FDSet *fds = NULL; | |
601 | int r; | |
602 | ||
603 | assert(m); | |
604 | assert(_f); | |
605 | assert(_fds); | |
606 | ||
607 | if ((r = manager_open_serialization(&f)) < 0) { | |
608 | log_error("Failed to create serialization faile: %s", strerror(-r)); | |
609 | goto fail; | |
610 | } | |
611 | ||
612 | if (!(fds = fdset_new())) { | |
613 | r = -ENOMEM; | |
614 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
615 | goto fail; | |
616 | } | |
617 | ||
618 | if ((r = manager_serialize(m, f, fds)) < 0) { | |
619 | log_error("Failed to serialize state: %s", strerror(-r)); | |
620 | goto fail; | |
621 | } | |
622 | ||
623 | if (fseeko(f, 0, SEEK_SET) < 0) { | |
624 | log_error("Failed to rewind serialization fd: %m"); | |
625 | goto fail; | |
626 | } | |
627 | ||
628 | if ((r = fd_cloexec(fileno(f), false)) < 0) { | |
629 | log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r)); | |
630 | goto fail; | |
631 | } | |
632 | ||
633 | if ((r = fdset_cloexec(fds, false)) < 0) { | |
634 | log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r)); | |
635 | goto fail; | |
636 | } | |
637 | ||
638 | *_f = f; | |
639 | *_fds = fds; | |
640 | ||
641 | return 0; | |
642 | ||
643 | fail: | |
644 | fdset_free(fds); | |
645 | ||
646 | if (f) | |
647 | fclose(f); | |
648 | ||
649 | return r; | |
650 | } | |
651 | ||
60918275 LP |
652 | int main(int argc, char *argv[]) { |
653 | Manager *m = NULL; | |
87f0e418 | 654 | Unit *target = NULL; |
60918275 LP |
655 | Job *job = NULL; |
656 | int r, retval = 1; | |
a16e1123 LP |
657 | FDSet *fds = NULL; |
658 | bool reexecute = false; | |
27b14a22 | 659 | |
2cb1a60d LP |
660 | if (getpid() != 1 && strstr(program_invocation_short_name, "init")) { |
661 | /* This is compatbility support for SysV, where | |
662 | * calling init as a user is identical to telinit. */ | |
663 | ||
664 | errno = -ENOENT; | |
665 | execv(SYSTEMCTL_BINARY_PATH, argv); | |
666 | log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m"); | |
667 | return 1; | |
668 | } | |
669 | ||
bbe63281 LP |
670 | log_show_color(true); |
671 | log_show_location(false); | |
672 | log_set_max_level(LOG_DEBUG); | |
673 | ||
843d2643 | 674 | if (getpid() == 1) { |
fa0f4d8a | 675 | arg_running_as = MANAGER_SYSTEM; |
843d2643 | 676 | log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); |
bbe63281 | 677 | } else { |
fa0f4d8a | 678 | arg_running_as = MANAGER_SESSION; |
bbe63281 LP |
679 | log_set_target(LOG_TARGET_CONSOLE); |
680 | } | |
a5dab5ce | 681 | |
f170852a LP |
682 | if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0) |
683 | goto finish; | |
60918275 | 684 | |
f170852a LP |
685 | /* Mount /proc, /sys and friends, so that /proc/cmdline and |
686 | * /proc/$PID/fd is available. */ | |
8efe3c01 LP |
687 | if (geteuid() == 0) |
688 | if (mount_setup() < 0) | |
689 | goto finish; | |
4ade7963 LP |
690 | |
691 | /* Reset all signal handlers. */ | |
692 | assert_se(reset_all_signal_handlers() == 0); | |
693 | ||
078e4539 | 694 | /* If we are init, we can block sigkill. Yay. */ |
9a34ec5f | 695 | ignore_signals(SIGNALS_IGNORE, -1); |
078e4539 | 696 | |
fa0f4d8a | 697 | if (arg_running_as == MANAGER_SYSTEM) |
a5dab5ce LP |
698 | if (parse_proc_cmdline() < 0) |
699 | goto finish; | |
f170852a LP |
700 | |
701 | log_parse_environment(); | |
702 | ||
703 | if (parse_argv(argc, argv) < 0) | |
704 | goto finish; | |
705 | ||
fa0f4d8a | 706 | if (arg_action == ACTION_HELP) { |
f170852a LP |
707 | retval = help(); |
708 | goto finish; | |
fa0f4d8a | 709 | } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) { |
e537352b LP |
710 | unit_dump_config_items(stdout); |
711 | retval = 0; | |
712 | goto finish; | |
fa0f4d8a | 713 | } else if (arg_action == ACTION_DONE) { |
4288f619 LP |
714 | retval = 0; |
715 | goto finish; | |
f170852a LP |
716 | } |
717 | ||
fa0f4d8a | 718 | assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST); |
f170852a | 719 | |
a16e1123 LP |
720 | /* Remember open file descriptors for later deserialization */ |
721 | if (serialization) { | |
722 | if ((r = fdset_new_fill(&fds)) < 0) { | |
723 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
724 | goto finish; | |
725 | } | |
726 | ||
727 | assert_se(fdset_remove(fds, fileno(serialization)) >= 0); | |
728 | } else | |
729 | close_all_fds(NULL, 0); | |
730 | ||
09082a94 | 731 | /* Set up PATH unless it is already set */ |
e537352b LP |
732 | setenv("PATH", |
733 | "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", | |
fa0f4d8a | 734 | arg_running_as == MANAGER_SYSTEM); |
09082a94 | 735 | |
f170852a LP |
736 | /* Move out of the way, so that we won't block unmounts */ |
737 | assert_se(chdir("/") == 0); | |
738 | ||
fa0f4d8a | 739 | if (arg_running_as == MANAGER_SYSTEM) { |
80876c20 LP |
740 | /* Become a session leader if we aren't one yet. */ |
741 | setsid(); | |
4ade7963 | 742 | |
80876c20 LP |
743 | /* Disable the umask logic */ |
744 | umask(0); | |
745 | } | |
746 | ||
843d2643 LP |
747 | /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */ |
748 | dbus_connection_set_change_sigpipe(FALSE); | |
749 | ||
2146621b LP |
750 | /* Reset the console, but only if this is really init and we |
751 | * are freshly booted */ | |
fa0f4d8a | 752 | if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) { |
2146621b | 753 | console_setup(getpid() == 1 && !serialization); |
843d2643 LP |
754 | make_null_stdio(); |
755 | } | |
4ade7963 | 756 | |
18149b9f | 757 | /* Open the logging devices, if possible and necessary */ |
843d2643 | 758 | log_open(); |
4ade7963 | 759 | |
5373d602 LP |
760 | /* Make sure we leave a core dump without panicing the |
761 | * kernel. */ | |
4fc935ca LP |
762 | if (getpid() == 1) |
763 | install_crash_handler(); | |
97c4f35c | 764 | |
fa0f4d8a | 765 | log_debug(PACKAGE_STRING " running in %s mode.", manager_running_as_to_string(arg_running_as)); |
a5dab5ce | 766 | |
c846ff47 LP |
767 | if (arg_running_as == MANAGER_SYSTEM && !serialization) { |
768 | status_welcome(); | |
fa0f4d8a | 769 | modprobe_setup(arg_nomodules); |
11c3a4ee | 770 | kmod_setup(); |
e537352b | 771 | hostname_setup(); |
af5bc85d LP |
772 | loopback_setup(); |
773 | } | |
302e8c4c | 774 | |
9e58ff9c | 775 | if ((r = manager_new(arg_running_as, &m)) < 0) { |
8e274523 | 776 | log_error("Failed to allocate manager object: %s", strerror(-r)); |
60918275 LP |
777 | goto finish; |
778 | } | |
779 | ||
9e58ff9c LP |
780 | m->confirm_spawn = arg_confirm_spawn; |
781 | m->show_status = arg_show_status; | |
782 | ||
a16e1123 | 783 | if ((r = manager_startup(m, serialization, fds)) < 0) |
6e2ef85b | 784 | log_error("Failed to fully start up daemon: %s", strerror(-r)); |
a16e1123 LP |
785 | |
786 | if (fds) { | |
787 | /* This will close all file descriptors that were opened, but | |
788 | * not claimed by any unit. */ | |
789 | ||
790 | fdset_free(fds); | |
791 | fds = NULL; | |
f50e0a01 LP |
792 | } |
793 | ||
a16e1123 LP |
794 | if (serialization) { |
795 | fclose(serialization); | |
796 | serialization = NULL; | |
797 | } else { | |
fa0f4d8a | 798 | log_debug("Activating default unit: %s", arg_default_unit); |
a16e1123 | 799 | |
fa0f4d8a | 800 | if ((r = manager_load_unit(m, arg_default_unit, NULL, &target)) < 0) { |
a16e1123 | 801 | log_error("Failed to load default target: %s", strerror(-r)); |
27b14a22 | 802 | |
a16e1123 LP |
803 | log_info("Trying to load rescue target..."); |
804 | if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &target)) < 0) { | |
805 | log_error("Failed to load rescue target: %s", strerror(-r)); | |
806 | goto finish; | |
807 | } | |
808 | } | |
37d88da7 | 809 | |
fa0f4d8a | 810 | if (arg_action == ACTION_TEST) { |
40d50879 | 811 | printf("-> By units:\n"); |
a16e1123 LP |
812 | manager_dump_units(m, stdout, "\t"); |
813 | } | |
814 | ||
815 | if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) { | |
816 | log_error("Failed to start default target: %s", strerror(-r)); | |
37d88da7 LP |
817 | goto finish; |
818 | } | |
60918275 | 819 | |
fa0f4d8a | 820 | if (arg_action == ACTION_TEST) { |
40d50879 | 821 | printf("-> By jobs:\n"); |
a16e1123 LP |
822 | manager_dump_jobs(m, stdout, "\t"); |
823 | retval = 0; | |
824 | goto finish; | |
825 | } | |
e965d56d | 826 | } |
d46de8a1 | 827 | |
a16e1123 LP |
828 | for (;;) { |
829 | if ((r = manager_loop(m)) < 0) { | |
830 | log_error("Failed to run mainloop: %s", strerror(-r)); | |
831 | goto finish; | |
832 | } | |
11dd41ce | 833 | |
a16e1123 | 834 | switch (m->exit_code) { |
e965d56d | 835 | |
a16e1123 LP |
836 | case MANAGER_EXIT: |
837 | retval = 0; | |
838 | log_debug("Exit."); | |
839 | goto finish; | |
e965d56d | 840 | |
a16e1123 LP |
841 | case MANAGER_RELOAD: |
842 | if ((r = manager_reload(m)) < 0) | |
843 | log_error("Failed to reload: %s", strerror(-r)); | |
844 | break; | |
cea8e32e | 845 | |
a16e1123 | 846 | case MANAGER_REEXECUTE: |
a16e1123 LP |
847 | if (prepare_reexecute(m, &serialization, &fds) < 0) |
848 | goto finish; | |
60918275 | 849 | |
a16e1123 LP |
850 | reexecute = true; |
851 | log_debug("Reexecuting."); | |
852 | goto finish; | |
853 | ||
854 | default: | |
855 | assert_not_reached("Unknown exit code."); | |
856 | } | |
857 | } | |
f170852a | 858 | |
60918275 LP |
859 | finish: |
860 | if (m) | |
861 | manager_free(m); | |
862 | ||
fa0f4d8a | 863 | free(arg_default_unit); |
b9cd2ec1 | 864 | |
ea430986 LP |
865 | dbus_shutdown(); |
866 | ||
a16e1123 LP |
867 | if (reexecute) { |
868 | const char *args[11]; | |
869 | unsigned i = 0; | |
870 | char sfd[16]; | |
871 | ||
872 | assert(serialization); | |
873 | assert(fds); | |
874 | ||
875 | args[i++] = SYSTEMD_BINARY_PATH; | |
876 | ||
877 | args[i++] = "--log-level"; | |
878 | args[i++] = log_level_to_string(log_get_max_level()); | |
879 | ||
880 | args[i++] = "--log-target"; | |
881 | args[i++] = log_target_to_string(log_get_target()); | |
882 | ||
883 | args[i++] = "--running-as"; | |
fa0f4d8a | 884 | args[i++] = manager_running_as_to_string(arg_running_as); |
a16e1123 LP |
885 | |
886 | snprintf(sfd, sizeof(sfd), "%i", fileno(serialization)); | |
887 | char_array_0(sfd); | |
888 | ||
889 | args[i++] = "--deserialize"; | |
890 | args[i++] = sfd; | |
891 | ||
fa0f4d8a | 892 | if (arg_confirm_spawn) |
a16e1123 LP |
893 | args[i++] = "--confirm-spawn"; |
894 | ||
895 | args[i++] = NULL; | |
896 | ||
897 | assert(i <= ELEMENTSOF(args)); | |
898 | ||
899 | execv(args[0], (char* const*) args); | |
900 | ||
901 | log_error("Failed to reexecute: %m"); | |
902 | } | |
903 | ||
904 | if (serialization) | |
905 | fclose(serialization); | |
906 | ||
907 | if (fds) | |
908 | fdset_free(fds); | |
909 | ||
c3b3c274 LP |
910 | if (getpid() == 1) |
911 | freeze(); | |
912 | ||
60918275 LP |
913 | return retval; |
914 | } |