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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; | |
4fc935ca | 62 | |
a16e1123 | 63 | static FILE* serialization = NULL; |
80876c20 | 64 | |
93a46b0b | 65 | _noreturn_ static void freeze(void) { |
97c4f35c LP |
66 | for (;;) |
67 | pause(); | |
68 | } | |
69 | ||
6f5e3f35 LP |
70 | static void nop_handler(int sig) { |
71 | } | |
72 | ||
93a46b0b | 73 | _noreturn_ static void crash(int sig) { |
97c4f35c | 74 | |
fa0f4d8a | 75 | if (!arg_dump_core) |
97c4f35c LP |
76 | log_error("Caught <%s>, not dumping core.", strsignal(sig)); |
77 | else { | |
6f5e3f35 | 78 | struct sigaction sa; |
97c4f35c LP |
79 | pid_t pid; |
80 | ||
6f5e3f35 LP |
81 | /* We want to wait for the core process, hence let's enable SIGCHLD */ |
82 | zero(sa); | |
83 | sa.sa_handler = nop_handler; | |
84 | sa.sa_flags = SA_NOCLDSTOP|SA_RESTART; | |
85 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
86 | ||
97c4f35c | 87 | if ((pid = fork()) < 0) |
4fc935ca | 88 | log_error("Caught <%s>, cannot fork for core dump: %s", strsignal(sig), strerror(errno)); |
97c4f35c LP |
89 | |
90 | else if (pid == 0) { | |
97c4f35c LP |
91 | struct rlimit rl; |
92 | ||
93 | /* Enable default signal handler for core dump */ | |
94 | zero(sa); | |
95 | sa.sa_handler = SIG_DFL; | |
96 | assert_se(sigaction(sig, &sa, NULL) == 0); | |
97 | ||
98 | /* Don't limit the core dump size */ | |
99 | zero(rl); | |
100 | rl.rlim_cur = RLIM_INFINITY; | |
101 | rl.rlim_max = RLIM_INFINITY; | |
102 | setrlimit(RLIMIT_CORE, &rl); | |
103 | ||
104 | /* Just to be sure... */ | |
105 | assert_se(chdir("/") == 0); | |
106 | ||
107 | /* Raise the signal again */ | |
108 | raise(sig); | |
109 | ||
110 | assert_not_reached("We shouldn't be here..."); | |
111 | _exit(1); | |
4fc935ca LP |
112 | |
113 | } else { | |
114 | int status, r; | |
115 | ||
116 | /* Order things nicely. */ | |
117 | if ((r = waitpid(pid, &status, 0)) < 0) | |
118 | log_error("Caught <%s>, waitpid() failed: %s", strsignal(sig), strerror(errno)); | |
119 | else if (!WCOREDUMP(status)) | |
120 | log_error("Caught <%s>, core dump failed.", strsignal(sig)); | |
121 | else | |
bb00e604 | 122 | log_error("Caught <%s>, dumped core as pid %lu.", strsignal(sig), (unsigned long) pid); |
97c4f35c LP |
123 | } |
124 | } | |
125 | ||
fa0f4d8a LP |
126 | if (arg_crash_chvt) |
127 | chvt(arg_crash_chvt); | |
601f6a1e | 128 | |
fa0f4d8a | 129 | if (arg_crash_shell) { |
6f5e3f35 LP |
130 | struct sigaction sa; |
131 | pid_t pid; | |
8c43883a | 132 | |
4fc935ca LP |
133 | log_info("Executing crash shell in 10s..."); |
134 | sleep(10); | |
135 | ||
6f5e3f35 LP |
136 | /* Let the kernel reap children for us */ |
137 | zero(sa); | |
138 | sa.sa_handler = SIG_IGN; | |
139 | sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART; | |
140 | assert_se(sigaction(SIGCHLD, &sa, NULL) == 0); | |
8c43883a | 141 | |
6f5e3f35 LP |
142 | if ((pid = fork()) < 0) |
143 | log_error("Failed to fork off crash shell: %s", strerror(errno)); | |
144 | else if (pid == 0) { | |
843d2643 | 145 | int fd, r; |
ea5652c2 | 146 | |
21de3988 | 147 | if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0) |
ea5652c2 | 148 | log_error("Failed to acquire terminal: %s", strerror(-fd)); |
5b2a0903 | 149 | else if ((r = make_stdio(fd)) < 0) |
843d2643 | 150 | log_error("Failed to duplicate terminal fd: %s", strerror(-r)); |
ea5652c2 | 151 | |
6f5e3f35 LP |
152 | execl("/bin/sh", "/bin/sh", NULL); |
153 | ||
154 | log_error("execl() failed: %s", strerror(errno)); | |
155 | _exit(1); | |
156 | } | |
c99b188e | 157 | |
bb00e604 | 158 | log_info("Successfully spawned crash shall as pid %lu.", (unsigned long) pid); |
4fc935ca LP |
159 | } |
160 | ||
161 | log_info("Freezing execution."); | |
97c4f35c LP |
162 | freeze(); |
163 | } | |
164 | ||
165 | static void install_crash_handler(void) { | |
166 | struct sigaction sa; | |
167 | ||
168 | zero(sa); | |
169 | ||
170 | sa.sa_handler = crash; | |
171 | sa.sa_flags = SA_NODEFER; | |
172 | ||
1b91d3e8 | 173 | sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1); |
97c4f35c | 174 | } |
f170852a | 175 | |
843d2643 LP |
176 | static int make_null_stdio(void) { |
177 | int null_fd, r; | |
80876c20 | 178 | |
c8513d54 | 179 | if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) { |
80876c20 | 180 | log_error("Failed to open /dev/null: %m"); |
843d2643 | 181 | return -errno; |
80876c20 LP |
182 | } |
183 | ||
843d2643 LP |
184 | if ((r = make_stdio(null_fd)) < 0) |
185 | log_warning("Failed to dup2() device: %s", strerror(-r)); | |
80876c20 | 186 | |
843d2643 LP |
187 | return r; |
188 | } | |
80876c20 | 189 | |
843d2643 LP |
190 | static int console_setup(bool do_reset) { |
191 | int tty_fd, r; | |
80876c20 | 192 | |
843d2643 LP |
193 | /* If we are init, we connect stdin/stdout/stderr to /dev/null |
194 | * and make sure we don't have a controlling tty. */ | |
80876c20 | 195 | |
843d2643 LP |
196 | release_terminal(); |
197 | ||
198 | if (!do_reset) | |
199 | return 0; | |
80876c20 | 200 | |
843d2643 LP |
201 | if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) { |
202 | log_error("Failed to open /dev/console: %s", strerror(-tty_fd)); | |
203 | return -tty_fd; | |
204 | } | |
80876c20 | 205 | |
843d2643 LP |
206 | if ((r = reset_terminal(tty_fd)) < 0) |
207 | log_error("Failed to reset /dev/console: %s", strerror(-r)); | |
208 | ||
209 | close_nointr_nofail(tty_fd); | |
80876c20 LP |
210 | return r; |
211 | } | |
212 | ||
f170852a LP |
213 | static int set_default_unit(const char *u) { |
214 | char *c; | |
215 | ||
216 | assert(u); | |
217 | ||
218 | if (!(c = strdup(u))) | |
219 | return -ENOMEM; | |
220 | ||
fa0f4d8a LP |
221 | free(arg_default_unit); |
222 | arg_default_unit = c; | |
f170852a LP |
223 | return 0; |
224 | } | |
225 | ||
226 | static int parse_proc_cmdline_word(const char *word) { | |
227 | ||
228 | static const char * const rlmap[] = { | |
514f4ef5 LP |
229 | "single", SPECIAL_RESCUE_TARGET, |
230 | "-s", SPECIAL_RESCUE_TARGET, | |
231 | "s", SPECIAL_RESCUE_TARGET, | |
232 | "S", SPECIAL_RESCUE_TARGET, | |
233 | "1", SPECIAL_RESCUE_TARGET, | |
f170852a LP |
234 | "2", SPECIAL_RUNLEVEL2_TARGET, |
235 | "3", SPECIAL_RUNLEVEL3_TARGET, | |
236 | "4", SPECIAL_RUNLEVEL4_TARGET, | |
237 | "5", SPECIAL_RUNLEVEL5_TARGET | |
238 | }; | |
239 | ||
2f198e2f LP |
240 | if (startswith(word, "systemd.unit=")) |
241 | return set_default_unit(word + 13); | |
f170852a LP |
242 | |
243 | else if (startswith(word, "systemd.log_target=")) { | |
244 | ||
245 | if (log_set_target_from_string(word + 19) < 0) | |
246 | log_warning("Failed to parse log target %s. Ignoring.", word + 19); | |
247 | ||
248 | } else if (startswith(word, "systemd.log_level=")) { | |
249 | ||
250 | if (log_set_max_level_from_string(word + 18) < 0) | |
251 | log_warning("Failed to parse log level %s. Ignoring.", word + 18); | |
252 | ||
bbe63281 LP |
253 | } else if (startswith(word, "systemd.log_color=")) { |
254 | ||
255 | if (log_show_color_from_string(word + 18) < 0) | |
256 | log_warning("Failed to parse log color setting %s. Ignoring.", word + 18); | |
257 | ||
258 | } else if (startswith(word, "systemd.log_location=")) { | |
259 | ||
260 | if (log_show_location_from_string(word + 21) < 0) | |
261 | log_warning("Failed to parse log location setting %s. Ignoring.", word + 21); | |
262 | ||
4fc935ca LP |
263 | } else if (startswith(word, "systemd.dump_core=")) { |
264 | int r; | |
265 | ||
266 | if ((r = parse_boolean(word + 18)) < 0) | |
601f6a1e | 267 | log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18); |
4fc935ca | 268 | else |
fa0f4d8a | 269 | arg_dump_core = r; |
4fc935ca LP |
270 | |
271 | } else if (startswith(word, "systemd.crash_shell=")) { | |
272 | int r; | |
273 | ||
274 | if ((r = parse_boolean(word + 20)) < 0) | |
601f6a1e | 275 | log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20); |
4fc935ca | 276 | else |
fa0f4d8a | 277 | arg_crash_shell = r; |
5e7ee61c LP |
278 | |
279 | } else if (startswith(word, "systemd.confirm_spawn=")) { | |
280 | int r; | |
281 | ||
282 | if ((r = parse_boolean(word + 22)) < 0) | |
283 | log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22); | |
284 | else | |
fa0f4d8a | 285 | arg_confirm_spawn = r; |
5e7ee61c | 286 | |
601f6a1e LP |
287 | } else if (startswith(word, "systemd.crash_chvt=")) { |
288 | int k; | |
289 | ||
290 | if (safe_atoi(word + 19, &k) < 0) | |
291 | log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19); | |
292 | else | |
fa0f4d8a | 293 | arg_crash_chvt = k; |
601f6a1e | 294 | |
4fc935ca LP |
295 | } else if (startswith(word, "systemd.")) { |
296 | ||
297 | log_warning("Unknown kernel switch %s. Ignoring.", word); | |
298 | ||
bbe63281 LP |
299 | log_info("Supported kernel switches:\n" |
300 | "systemd.unit=UNIT Default unit to start\n" | |
301 | "systemd.log_target=console|kmsg|syslog| Log target\n" | |
302 | " syslog-org-kmsg|null\n" | |
303 | "systemd.log_level=LEVEL Log level\n" | |
304 | "systemd.log_color=0|1 Highlight important log messages\n" | |
305 | "systemd.log_location=0|1 Include code location in log messages\n" | |
306 | "systemd.dump_core=0|1 Dump core on crash\n" | |
307 | "systemd.crash_shell=0|1 On crash run shell\n" | |
308 | "systemd.crash_chvt=N Change to VT #N on crash\n" | |
309 | "systemd.confirm_spawn=0|1 Confirm every process spawn"); | |
4fc935ca | 310 | |
fa0f4d8a LP |
311 | } else if (streq(word, "nomodules")) |
312 | arg_nomodules = true; | |
313 | else { | |
f170852a LP |
314 | unsigned i; |
315 | ||
316 | /* SysV compatibility */ | |
f170852a LP |
317 | for (i = 0; i < ELEMENTSOF(rlmap); i += 2) |
318 | if (streq(word, rlmap[i])) | |
319 | return set_default_unit(rlmap[i+1]); | |
320 | } | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | static int parse_proc_cmdline(void) { | |
326 | char *line; | |
327 | int r; | |
328 | char *w; | |
329 | size_t l; | |
330 | char *state; | |
331 | ||
332 | if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { | |
333 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno)); | |
334 | return 0; | |
335 | } | |
336 | ||
337 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
338 | char *word; | |
339 | ||
340 | if (!(word = strndup(w, l))) { | |
341 | r = -ENOMEM; | |
342 | goto finish; | |
343 | } | |
344 | ||
345 | r = parse_proc_cmdline_word(word); | |
346 | free(word); | |
347 | ||
348 | if (r < 0) | |
349 | goto finish; | |
350 | } | |
351 | ||
352 | r = 0; | |
353 | ||
354 | finish: | |
355 | free(line); | |
356 | return r; | |
357 | } | |
358 | ||
359 | static int parse_argv(int argc, char *argv[]) { | |
360 | ||
361 | enum { | |
362 | ARG_LOG_LEVEL = 0x100, | |
363 | ARG_LOG_TARGET, | |
bbe63281 LP |
364 | ARG_LOG_COLOR, |
365 | ARG_LOG_LOCATION, | |
2f198e2f | 366 | ARG_UNIT, |
e965d56d | 367 | ARG_RUNNING_AS, |
e537352b | 368 | ARG_TEST, |
80876c20 | 369 | ARG_DUMP_CONFIGURATION_ITEMS, |
a16e1123 | 370 | ARG_CONFIRM_SPAWN, |
4288f619 LP |
371 | ARG_DESERIALIZE, |
372 | ARG_INTROSPECT | |
f170852a LP |
373 | }; |
374 | ||
375 | static const struct option options[] = { | |
a16e1123 LP |
376 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, |
377 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
bbe63281 LP |
378 | { "log-color", optional_argument, NULL, ARG_LOG_COLOR }, |
379 | { "log-location", optional_argument, NULL, ARG_LOG_LOCATION }, | |
2f198e2f | 380 | { "unit", required_argument, NULL, ARG_UNIT }, |
a16e1123 LP |
381 | { "running-as", required_argument, NULL, ARG_RUNNING_AS }, |
382 | { "test", no_argument, NULL, ARG_TEST }, | |
383 | { "help", no_argument, NULL, 'h' }, | |
384 | { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS }, | |
385 | { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN }, | |
386 | { "deserialize", required_argument, NULL, ARG_DESERIALIZE }, | |
4288f619 | 387 | { "introspect", optional_argument, NULL, ARG_INTROSPECT }, |
a16e1123 | 388 | { NULL, 0, NULL, 0 } |
f170852a LP |
389 | }; |
390 | ||
391 | int c, r; | |
392 | ||
393 | assert(argc >= 1); | |
394 | assert(argv); | |
395 | ||
396 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
397 | ||
398 | switch (c) { | |
399 | ||
400 | case ARG_LOG_LEVEL: | |
401 | if ((r = log_set_max_level_from_string(optarg)) < 0) { | |
402 | log_error("Failed to parse log level %s.", optarg); | |
403 | return r; | |
404 | } | |
405 | ||
406 | break; | |
407 | ||
408 | case ARG_LOG_TARGET: | |
409 | ||
410 | if ((r = log_set_target_from_string(optarg)) < 0) { | |
411 | log_error("Failed to parse log target %s.", optarg); | |
412 | return r; | |
413 | } | |
414 | ||
415 | break; | |
416 | ||
bbe63281 LP |
417 | case ARG_LOG_COLOR: |
418 | ||
d0b170c8 LP |
419 | if (optarg) { |
420 | if ((r = log_show_color_from_string(optarg)) < 0) { | |
421 | log_error("Failed to parse log color setting %s.", optarg); | |
422 | return r; | |
423 | } | |
424 | } else | |
425 | log_show_color(true); | |
bbe63281 LP |
426 | |
427 | break; | |
428 | ||
429 | case ARG_LOG_LOCATION: | |
430 | ||
d0b170c8 LP |
431 | if (optarg) { |
432 | if ((r = log_show_location_from_string(optarg)) < 0) { | |
433 | log_error("Failed to parse log location setting %s.", optarg); | |
434 | return r; | |
435 | } | |
436 | } else | |
437 | log_show_location(true); | |
bbe63281 LP |
438 | |
439 | break; | |
440 | ||
2f198e2f | 441 | case ARG_UNIT: |
f170852a LP |
442 | |
443 | if ((r = set_default_unit(optarg)) < 0) { | |
444 | log_error("Failed to set default unit %s: %s", optarg, strerror(-r)); | |
445 | return r; | |
446 | } | |
447 | ||
448 | break; | |
449 | ||
a5dab5ce LP |
450 | case ARG_RUNNING_AS: { |
451 | ManagerRunningAs as; | |
452 | ||
453 | if ((as = manager_running_as_from_string(optarg)) < 0) { | |
454 | log_error("Failed to parse running as value %s", optarg); | |
455 | return -EINVAL; | |
456 | } | |
457 | ||
fa0f4d8a | 458 | arg_running_as = as; |
a5dab5ce LP |
459 | break; |
460 | } | |
461 | ||
e965d56d | 462 | case ARG_TEST: |
fa0f4d8a | 463 | arg_action = ACTION_TEST; |
e965d56d LP |
464 | break; |
465 | ||
e537352b | 466 | case ARG_DUMP_CONFIGURATION_ITEMS: |
fa0f4d8a | 467 | arg_action = ACTION_DUMP_CONFIGURATION_ITEMS; |
e537352b LP |
468 | break; |
469 | ||
80876c20 | 470 | case ARG_CONFIRM_SPAWN: |
fa0f4d8a | 471 | arg_confirm_spawn = true; |
80876c20 LP |
472 | break; |
473 | ||
a16e1123 LP |
474 | case ARG_DESERIALIZE: { |
475 | int fd; | |
476 | FILE *f; | |
477 | ||
478 | if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) { | |
479 | log_error("Failed to parse deserialize option %s.", optarg); | |
480 | return r; | |
481 | } | |
482 | ||
483 | if (!(f = fdopen(fd, "r"))) { | |
484 | log_error("Failed to open serialization fd: %m"); | |
485 | return r; | |
486 | } | |
487 | ||
488 | if (serialization) | |
489 | fclose(serialization); | |
490 | ||
491 | serialization = f; | |
492 | ||
493 | break; | |
494 | } | |
495 | ||
4288f619 LP |
496 | case ARG_INTROSPECT: { |
497 | const char * const * i = NULL; | |
498 | ||
499 | for (i = bus_interface_table; *i; i += 2) | |
500 | if (!optarg || streq(i[0], optarg)) { | |
501 | fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE | |
502 | "<node>\n", stdout); | |
503 | fputs(i[1], stdout); | |
504 | fputs("</node>\n", stdout); | |
505 | ||
506 | if (optarg) | |
507 | break; | |
508 | } | |
509 | ||
510 | if (!i[0] && optarg) | |
511 | log_error("Unknown interface %s.", optarg); | |
512 | ||
fa0f4d8a | 513 | arg_action = ACTION_DONE; |
4288f619 LP |
514 | break; |
515 | } | |
516 | ||
f170852a | 517 | case 'h': |
fa0f4d8a | 518 | arg_action = ACTION_HELP; |
f170852a LP |
519 | break; |
520 | ||
521 | case '?': | |
522 | return -EINVAL; | |
523 | ||
524 | default: | |
525 | log_error("Unknown option code %c", c); | |
526 | return -EINVAL; | |
527 | } | |
528 | ||
51f0e189 LP |
529 | /* PID 1 will get the kernel arguments as parameters, which we |
530 | * ignore and unconditionally read from | |
531 | * /proc/cmdline. However, we need to ignore those arguments | |
532 | * here. */ | |
fa0f4d8a | 533 | if (arg_running_as != MANAGER_SYSTEM && optind < argc) { |
51f0e189 LP |
534 | log_error("Excess arguments."); |
535 | return -EINVAL; | |
536 | } | |
537 | ||
f170852a LP |
538 | return 0; |
539 | } | |
540 | ||
541 | static int help(void) { | |
542 | ||
2e33c433 | 543 | printf("%s [OPTIONS...]\n\n" |
bbe63281 | 544 | "Starts up and maintains the system or a session.\n\n" |
e537352b | 545 | " -h --help Show this help\n" |
41192f6e | 546 | " --unit=UNIT Set default unit\n" |
a3d4e06d | 547 | " --running-as=AS Set running as (system, session)\n" |
e537352b | 548 | " --test Determine startup sequence, dump it and exit\n" |
80876c20 | 549 | " --dump-configuration-items Dump understood unit configuration items\n" |
4288f619 | 550 | " --confirm-spawn Ask for confirmation when spawning processes\n" |
bbe63281 LP |
551 | " --introspect[=INTERFACE] Extract D-Bus interface data\n" |
552 | " --log-level=LEVEL Set log level\n" | |
553 | " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n" | |
2218198b | 554 | " --log-color[=0|1] Highlight important log messages\n" |
bbe63281 | 555 | " --log-location[=0|1] Include code location in log messages\n", |
5b6319dc | 556 | program_invocation_short_name); |
f170852a LP |
557 | |
558 | return 0; | |
559 | } | |
560 | ||
a16e1123 LP |
561 | static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) { |
562 | FILE *f = NULL; | |
563 | FDSet *fds = NULL; | |
564 | int r; | |
565 | ||
566 | assert(m); | |
567 | assert(_f); | |
568 | assert(_fds); | |
569 | ||
570 | if ((r = manager_open_serialization(&f)) < 0) { | |
571 | log_error("Failed to create serialization faile: %s", strerror(-r)); | |
572 | goto fail; | |
573 | } | |
574 | ||
575 | if (!(fds = fdset_new())) { | |
576 | r = -ENOMEM; | |
577 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
578 | goto fail; | |
579 | } | |
580 | ||
581 | if ((r = manager_serialize(m, f, fds)) < 0) { | |
582 | log_error("Failed to serialize state: %s", strerror(-r)); | |
583 | goto fail; | |
584 | } | |
585 | ||
586 | if (fseeko(f, 0, SEEK_SET) < 0) { | |
587 | log_error("Failed to rewind serialization fd: %m"); | |
588 | goto fail; | |
589 | } | |
590 | ||
591 | if ((r = fd_cloexec(fileno(f), false)) < 0) { | |
592 | log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r)); | |
593 | goto fail; | |
594 | } | |
595 | ||
596 | if ((r = fdset_cloexec(fds, false)) < 0) { | |
597 | log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r)); | |
598 | goto fail; | |
599 | } | |
600 | ||
601 | *_f = f; | |
602 | *_fds = fds; | |
603 | ||
604 | return 0; | |
605 | ||
606 | fail: | |
607 | fdset_free(fds); | |
608 | ||
609 | if (f) | |
610 | fclose(f); | |
611 | ||
612 | return r; | |
613 | } | |
614 | ||
60918275 LP |
615 | int main(int argc, char *argv[]) { |
616 | Manager *m = NULL; | |
87f0e418 | 617 | Unit *target = NULL; |
60918275 LP |
618 | Job *job = NULL; |
619 | int r, retval = 1; | |
a16e1123 LP |
620 | FDSet *fds = NULL; |
621 | bool reexecute = false; | |
27b14a22 | 622 | |
2cb1a60d LP |
623 | if (getpid() != 1 && strstr(program_invocation_short_name, "init")) { |
624 | /* This is compatbility support for SysV, where | |
625 | * calling init as a user is identical to telinit. */ | |
626 | ||
627 | errno = -ENOENT; | |
628 | execv(SYSTEMCTL_BINARY_PATH, argv); | |
629 | log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m"); | |
630 | return 1; | |
631 | } | |
632 | ||
bbe63281 LP |
633 | log_show_color(true); |
634 | log_show_location(false); | |
635 | log_set_max_level(LOG_DEBUG); | |
636 | ||
843d2643 | 637 | if (getpid() == 1) { |
fa0f4d8a | 638 | arg_running_as = MANAGER_SYSTEM; |
843d2643 | 639 | log_set_target(LOG_TARGET_SYSLOG_OR_KMSG); |
bbe63281 | 640 | } else { |
fa0f4d8a | 641 | arg_running_as = MANAGER_SESSION; |
bbe63281 LP |
642 | log_set_target(LOG_TARGET_CONSOLE); |
643 | } | |
a5dab5ce | 644 | |
f170852a LP |
645 | if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0) |
646 | goto finish; | |
60918275 | 647 | |
f170852a LP |
648 | /* Mount /proc, /sys and friends, so that /proc/cmdline and |
649 | * /proc/$PID/fd is available. */ | |
8efe3c01 LP |
650 | if (geteuid() == 0) |
651 | if (mount_setup() < 0) | |
652 | goto finish; | |
4ade7963 LP |
653 | |
654 | /* Reset all signal handlers. */ | |
655 | assert_se(reset_all_signal_handlers() == 0); | |
656 | ||
078e4539 | 657 | /* If we are init, we can block sigkill. Yay. */ |
9a34ec5f | 658 | ignore_signals(SIGNALS_IGNORE, -1); |
078e4539 | 659 | |
fa0f4d8a | 660 | if (arg_running_as == MANAGER_SYSTEM) |
a5dab5ce LP |
661 | if (parse_proc_cmdline() < 0) |
662 | goto finish; | |
f170852a LP |
663 | |
664 | log_parse_environment(); | |
665 | ||
666 | if (parse_argv(argc, argv) < 0) | |
667 | goto finish; | |
668 | ||
fa0f4d8a | 669 | if (arg_action == ACTION_HELP) { |
f170852a LP |
670 | retval = help(); |
671 | goto finish; | |
fa0f4d8a | 672 | } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) { |
e537352b LP |
673 | unit_dump_config_items(stdout); |
674 | retval = 0; | |
675 | goto finish; | |
fa0f4d8a | 676 | } else if (arg_action == ACTION_DONE) { |
4288f619 LP |
677 | retval = 0; |
678 | goto finish; | |
f170852a LP |
679 | } |
680 | ||
fa0f4d8a | 681 | assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST); |
f170852a | 682 | |
a16e1123 LP |
683 | /* Remember open file descriptors for later deserialization */ |
684 | if (serialization) { | |
685 | if ((r = fdset_new_fill(&fds)) < 0) { | |
686 | log_error("Failed to allocate fd set: %s", strerror(-r)); | |
687 | goto finish; | |
688 | } | |
689 | ||
690 | assert_se(fdset_remove(fds, fileno(serialization)) >= 0); | |
691 | } else | |
692 | close_all_fds(NULL, 0); | |
693 | ||
09082a94 | 694 | /* Set up PATH unless it is already set */ |
e537352b LP |
695 | setenv("PATH", |
696 | "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", | |
fa0f4d8a | 697 | arg_running_as == MANAGER_SYSTEM); |
09082a94 | 698 | |
f170852a LP |
699 | /* Move out of the way, so that we won't block unmounts */ |
700 | assert_se(chdir("/") == 0); | |
701 | ||
fa0f4d8a | 702 | if (arg_running_as == MANAGER_SYSTEM) { |
80876c20 LP |
703 | /* Become a session leader if we aren't one yet. */ |
704 | setsid(); | |
4ade7963 | 705 | |
80876c20 LP |
706 | /* Disable the umask logic */ |
707 | umask(0); | |
708 | } | |
709 | ||
843d2643 LP |
710 | /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */ |
711 | dbus_connection_set_change_sigpipe(FALSE); | |
712 | ||
2146621b LP |
713 | /* Reset the console, but only if this is really init and we |
714 | * are freshly booted */ | |
fa0f4d8a | 715 | if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) { |
2146621b | 716 | console_setup(getpid() == 1 && !serialization); |
843d2643 LP |
717 | make_null_stdio(); |
718 | } | |
4ade7963 | 719 | |
18149b9f | 720 | /* Open the logging devices, if possible and necessary */ |
843d2643 | 721 | log_open(); |
4ade7963 | 722 | |
5373d602 LP |
723 | /* Make sure we leave a core dump without panicing the |
724 | * kernel. */ | |
4fc935ca LP |
725 | if (getpid() == 1) |
726 | install_crash_handler(); | |
97c4f35c | 727 | |
fa0f4d8a | 728 | log_debug(PACKAGE_STRING " running in %s mode.", manager_running_as_to_string(arg_running_as)); |
a5dab5ce | 729 | |
fa0f4d8a LP |
730 | if (arg_running_as == MANAGER_SYSTEM) { |
731 | modprobe_setup(arg_nomodules); | |
11c3a4ee | 732 | kmod_setup(); |
e537352b | 733 | hostname_setup(); |
af5bc85d LP |
734 | loopback_setup(); |
735 | } | |
302e8c4c | 736 | |
fa0f4d8a | 737 | if ((r = manager_new(arg_running_as, arg_confirm_spawn, &m)) < 0) { |
8e274523 | 738 | log_error("Failed to allocate manager object: %s", strerror(-r)); |
60918275 LP |
739 | goto finish; |
740 | } | |
741 | ||
a16e1123 | 742 | if ((r = manager_startup(m, serialization, fds)) < 0) |
6e2ef85b | 743 | log_error("Failed to fully start up daemon: %s", strerror(-r)); |
a16e1123 LP |
744 | |
745 | if (fds) { | |
746 | /* This will close all file descriptors that were opened, but | |
747 | * not claimed by any unit. */ | |
748 | ||
749 | fdset_free(fds); | |
750 | fds = NULL; | |
f50e0a01 LP |
751 | } |
752 | ||
a16e1123 LP |
753 | if (serialization) { |
754 | fclose(serialization); | |
755 | serialization = NULL; | |
756 | } else { | |
fa0f4d8a | 757 | log_debug("Activating default unit: %s", arg_default_unit); |
a16e1123 | 758 | |
fa0f4d8a | 759 | if ((r = manager_load_unit(m, arg_default_unit, NULL, &target)) < 0) { |
a16e1123 | 760 | log_error("Failed to load default target: %s", strerror(-r)); |
27b14a22 | 761 | |
a16e1123 LP |
762 | log_info("Trying to load rescue target..."); |
763 | if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &target)) < 0) { | |
764 | log_error("Failed to load rescue target: %s", strerror(-r)); | |
765 | goto finish; | |
766 | } | |
767 | } | |
37d88da7 | 768 | |
fa0f4d8a | 769 | if (arg_action == ACTION_TEST) { |
40d50879 | 770 | printf("-> By units:\n"); |
a16e1123 LP |
771 | manager_dump_units(m, stdout, "\t"); |
772 | } | |
773 | ||
774 | if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) { | |
775 | log_error("Failed to start default target: %s", strerror(-r)); | |
37d88da7 LP |
776 | goto finish; |
777 | } | |
60918275 | 778 | |
fa0f4d8a | 779 | if (arg_action == ACTION_TEST) { |
40d50879 | 780 | printf("-> By jobs:\n"); |
a16e1123 LP |
781 | manager_dump_jobs(m, stdout, "\t"); |
782 | retval = 0; | |
783 | goto finish; | |
784 | } | |
e965d56d | 785 | } |
d46de8a1 | 786 | |
a16e1123 LP |
787 | for (;;) { |
788 | if ((r = manager_loop(m)) < 0) { | |
789 | log_error("Failed to run mainloop: %s", strerror(-r)); | |
790 | goto finish; | |
791 | } | |
11dd41ce | 792 | |
a16e1123 | 793 | switch (m->exit_code) { |
e965d56d | 794 | |
a16e1123 LP |
795 | case MANAGER_EXIT: |
796 | retval = 0; | |
797 | log_debug("Exit."); | |
798 | goto finish; | |
e965d56d | 799 | |
a16e1123 LP |
800 | case MANAGER_RELOAD: |
801 | if ((r = manager_reload(m)) < 0) | |
802 | log_error("Failed to reload: %s", strerror(-r)); | |
803 | break; | |
cea8e32e | 804 | |
a16e1123 | 805 | case MANAGER_REEXECUTE: |
a16e1123 LP |
806 | if (prepare_reexecute(m, &serialization, &fds) < 0) |
807 | goto finish; | |
60918275 | 808 | |
a16e1123 LP |
809 | reexecute = true; |
810 | log_debug("Reexecuting."); | |
811 | goto finish; | |
812 | ||
813 | default: | |
814 | assert_not_reached("Unknown exit code."); | |
815 | } | |
816 | } | |
f170852a | 817 | |
60918275 LP |
818 | finish: |
819 | if (m) | |
820 | manager_free(m); | |
821 | ||
fa0f4d8a | 822 | free(arg_default_unit); |
b9cd2ec1 | 823 | |
ea430986 LP |
824 | dbus_shutdown(); |
825 | ||
a16e1123 LP |
826 | if (reexecute) { |
827 | const char *args[11]; | |
828 | unsigned i = 0; | |
829 | char sfd[16]; | |
830 | ||
831 | assert(serialization); | |
832 | assert(fds); | |
833 | ||
834 | args[i++] = SYSTEMD_BINARY_PATH; | |
835 | ||
836 | args[i++] = "--log-level"; | |
837 | args[i++] = log_level_to_string(log_get_max_level()); | |
838 | ||
839 | args[i++] = "--log-target"; | |
840 | args[i++] = log_target_to_string(log_get_target()); | |
841 | ||
842 | args[i++] = "--running-as"; | |
fa0f4d8a | 843 | args[i++] = manager_running_as_to_string(arg_running_as); |
a16e1123 LP |
844 | |
845 | snprintf(sfd, sizeof(sfd), "%i", fileno(serialization)); | |
846 | char_array_0(sfd); | |
847 | ||
848 | args[i++] = "--deserialize"; | |
849 | args[i++] = sfd; | |
850 | ||
fa0f4d8a | 851 | if (arg_confirm_spawn) |
a16e1123 LP |
852 | args[i++] = "--confirm-spawn"; |
853 | ||
854 | args[i++] = NULL; | |
855 | ||
856 | assert(i <= ELEMENTSOF(args)); | |
857 | ||
858 | execv(args[0], (char* const*) args); | |
859 | ||
860 | log_error("Failed to reexecute: %m"); | |
861 | } | |
862 | ||
863 | if (serialization) | |
864 | fclose(serialization); | |
865 | ||
866 | if (fds) | |
867 | fdset_free(fds); | |
868 | ||
c3b3c274 LP |
869 | if (getpid() == 1) |
870 | freeze(); | |
871 | ||
60918275 LP |
872 | return retval; |
873 | } |