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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
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 | ||
22 | #include <errno.h> | |
23 | #include <signal.h> | |
24 | #include <dirent.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | #include "unit.h" | |
28 | #include "service.h" | |
29 | #include "load-fragment.h" | |
30 | #include "load-dropin.h" | |
31 | #include "log.h" | |
32 | #include "strv.h" | |
33 | #include "unit-name.h" | |
34 | #include "dbus-service.h" | |
35 | #include "special.h" | |
36 | #include "bus-errors.h" | |
37 | ||
38 | #define COMMENTS "#;\n" | |
39 | #define NEWLINES "\n\r" | |
40 | ||
41 | typedef enum RunlevelType { | |
42 | RUNLEVEL_UP, | |
43 | RUNLEVEL_DOWN, | |
44 | RUNLEVEL_SYSINIT | |
45 | } RunlevelType; | |
46 | ||
47 | static const struct { | |
48 | const char *path; | |
49 | const char *target; | |
50 | const RunlevelType type; | |
51 | } rcnd_table[] = { | |
52 | /* Standard SysV runlevels for start-up */ | |
53 | { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP }, | |
54 | { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP }, | |
55 | { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP }, | |
56 | { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP }, | |
57 | { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP }, | |
58 | ||
59 | #ifdef TARGET_SUSE | |
60 | /* SUSE style boot.d */ | |
61 | { "boot.d", SPECIAL_SYSINIT_TARGET, RUNLEVEL_SYSINIT }, | |
62 | #endif | |
63 | ||
64 | #ifdef TARGET_DEBIAN | |
65 | /* Debian style rcS.d */ | |
66 | { "rcS.d", SPECIAL_SYSINIT_TARGET, RUNLEVEL_SYSINIT }, | |
67 | #endif | |
68 | ||
69 | /* Standard SysV runlevels for shutdown */ | |
70 | { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN }, | |
71 | { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN } | |
72 | ||
73 | /* Note that the order here matters, as we read the | |
74 | directories in this order, and we want to make sure that | |
75 | sysv_start_priority is known when we first load the | |
76 | unit. And that value we only know from S links. Hence | |
77 | UP/SYSINIT must be read before DOWN */ | |
78 | }; | |
79 | ||
80 | #define RUNLEVELS_UP "12345" | |
81 | /* #define RUNLEVELS_DOWN "06" */ | |
82 | /* #define RUNLEVELS_BOOT "bBsS" */ | |
83 | ||
84 | static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = { | |
85 | [SERVICE_DEAD] = UNIT_INACTIVE, | |
86 | [SERVICE_START_PRE] = UNIT_ACTIVATING, | |
87 | [SERVICE_START] = UNIT_ACTIVATING, | |
88 | [SERVICE_START_POST] = UNIT_ACTIVATING, | |
89 | [SERVICE_RUNNING] = UNIT_ACTIVE, | |
90 | [SERVICE_EXITED] = UNIT_ACTIVE, | |
91 | [SERVICE_RELOAD] = UNIT_RELOADING, | |
92 | [SERVICE_STOP] = UNIT_DEACTIVATING, | |
93 | [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING, | |
94 | [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
95 | [SERVICE_STOP_POST] = UNIT_DEACTIVATING, | |
96 | [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING, | |
97 | [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
98 | [SERVICE_MAINTENANCE] = UNIT_MAINTENANCE, | |
99 | [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING | |
100 | }; | |
101 | ||
102 | static void service_init(Unit *u) { | |
103 | Service *s = SERVICE(u); | |
104 | ||
105 | assert(u); | |
106 | assert(u->meta.load_state == UNIT_STUB); | |
107 | ||
108 | s->timeout_usec = DEFAULT_TIMEOUT_USEC; | |
109 | s->restart_usec = DEFAULT_RESTART_USEC; | |
110 | s->timer_watch.type = WATCH_INVALID; | |
111 | s->sysv_start_priority = -1; | |
112 | s->socket_fd = -1; | |
113 | ||
114 | exec_context_init(&s->exec_context); | |
115 | ||
116 | RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5); | |
117 | ||
118 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
119 | } | |
120 | ||
121 | static void service_unwatch_control_pid(Service *s) { | |
122 | assert(s); | |
123 | ||
124 | if (s->control_pid <= 0) | |
125 | return; | |
126 | ||
127 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
128 | s->control_pid = 0; | |
129 | } | |
130 | ||
131 | static void service_unwatch_main_pid(Service *s) { | |
132 | assert(s); | |
133 | ||
134 | if (s->main_pid <= 0) | |
135 | return; | |
136 | ||
137 | unit_unwatch_pid(UNIT(s), s->main_pid); | |
138 | s->main_pid = 0; | |
139 | } | |
140 | ||
141 | static int service_set_main_pid(Service *s, pid_t pid) { | |
142 | pid_t ppid; | |
143 | ||
144 | assert(s); | |
145 | ||
146 | if (pid <= 1) | |
147 | return -EINVAL; | |
148 | ||
149 | if (pid == getpid()) | |
150 | return -EINVAL; | |
151 | ||
152 | if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) | |
153 | log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.", | |
154 | s->meta.id, (unsigned long) pid); | |
155 | ||
156 | s->main_pid = pid; | |
157 | s->main_pid_known = true; | |
158 | ||
159 | exec_status_start(&s->main_exec_status, pid); | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static void service_close_socket_fd(Service *s) { | |
165 | assert(s); | |
166 | ||
167 | if (s->socket_fd < 0) | |
168 | return; | |
169 | ||
170 | close_nointr_nofail(s->socket_fd); | |
171 | s->socket_fd = -1; | |
172 | } | |
173 | ||
174 | static void service_connection_unref(Service *s) { | |
175 | assert(s); | |
176 | ||
177 | if (!s->socket) | |
178 | return; | |
179 | ||
180 | socket_connection_unref(s->socket); | |
181 | s->socket = NULL; | |
182 | } | |
183 | ||
184 | static void service_done(Unit *u) { | |
185 | Service *s = SERVICE(u); | |
186 | ||
187 | assert(s); | |
188 | ||
189 | free(s->pid_file); | |
190 | s->pid_file = NULL; | |
191 | ||
192 | free(s->sysv_path); | |
193 | s->sysv_path = NULL; | |
194 | ||
195 | free(s->sysv_runlevels); | |
196 | s->sysv_runlevels = NULL; | |
197 | ||
198 | free(s->status_text); | |
199 | s->status_text = NULL; | |
200 | ||
201 | exec_context_done(&s->exec_context); | |
202 | exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX); | |
203 | s->control_command = NULL; | |
204 | ||
205 | /* This will leak a process, but at least no memory or any of | |
206 | * our resources */ | |
207 | service_unwatch_main_pid(s); | |
208 | service_unwatch_control_pid(s); | |
209 | ||
210 | if (s->bus_name) { | |
211 | unit_unwatch_bus_name(UNIT(u), s->bus_name); | |
212 | free(s->bus_name); | |
213 | s->bus_name = NULL; | |
214 | } | |
215 | ||
216 | service_close_socket_fd(s); | |
217 | service_connection_unref(s); | |
218 | ||
219 | unit_unwatch_timer(u, &s->timer_watch); | |
220 | } | |
221 | ||
222 | static char *sysv_translate_name(const char *name) { | |
223 | char *r; | |
224 | ||
225 | if (!(r = new(char, strlen(name) + sizeof(".service")))) | |
226 | return NULL; | |
227 | ||
228 | if (startswith(name, "boot.")) | |
229 | /* Drop SuSE-style boot. prefix */ | |
230 | strcpy(stpcpy(r, name + 5), ".service"); | |
231 | else if (endswith(name, ".sh")) | |
232 | /* Drop Debian-style .sh suffix */ | |
233 | strcpy(stpcpy(r, name) - 3, ".service"); | |
234 | else | |
235 | /* Normal init scripts */ | |
236 | strcpy(stpcpy(r, name), ".service"); | |
237 | ||
238 | return r; | |
239 | } | |
240 | ||
241 | static int sysv_translate_facility(const char *name, char **_r) { | |
242 | ||
243 | static const char * const table[] = { | |
244 | /* LSB defined facilities */ | |
245 | "$local_fs", SPECIAL_LOCAL_FS_TARGET, | |
246 | "$network", SPECIAL_NETWORK_TARGET, | |
247 | "$named", SPECIAL_NSS_LOOKUP_TARGET, | |
248 | "$portmap", SPECIAL_RPCBIND_TARGET, | |
249 | "$remote_fs", SPECIAL_REMOTE_FS_TARGET, | |
250 | "$syslog", SPECIAL_SYSLOG_TARGET, | |
251 | "$time", SPECIAL_RTC_SET_TARGET, | |
252 | ||
253 | /* Debian extensions */ | |
254 | "$mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET, | |
255 | "$mail-transfer-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET, | |
256 | "$x-display-manager", SPECIAL_DISPLAY_MANAGER_SERVICE | |
257 | }; | |
258 | ||
259 | unsigned i; | |
260 | char *r; | |
261 | ||
262 | for (i = 0; i < ELEMENTSOF(table); i += 2) | |
263 | if (streq(table[i], name)) { | |
264 | if (!(r = strdup(table[i+1]))) | |
265 | return -ENOMEM; | |
266 | ||
267 | goto finish; | |
268 | } | |
269 | ||
270 | if (*name == '$') | |
271 | return 0; | |
272 | ||
273 | if (!(r = sysv_translate_name(name))) | |
274 | return -ENOMEM; | |
275 | ||
276 | finish: | |
277 | ||
278 | if (_r) | |
279 | *_r = r; | |
280 | ||
281 | return 1; | |
282 | } | |
283 | ||
284 | static int sysv_fix_order(Service *s) { | |
285 | Meta *other; | |
286 | int r; | |
287 | ||
288 | assert(s); | |
289 | ||
290 | if (s->sysv_start_priority < 0) | |
291 | return 0; | |
292 | ||
293 | /* For each pair of services where at least one lacks a LSB | |
294 | * header, we use the start priority value to order things. */ | |
295 | ||
296 | LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) { | |
297 | Service *t; | |
298 | UnitDependency d; | |
299 | bool special_s, special_t; | |
300 | ||
301 | t = (Service*) other; | |
302 | ||
303 | if (s == t) | |
304 | continue; | |
305 | ||
306 | if (t->sysv_start_priority < 0) | |
307 | continue; | |
308 | ||
309 | /* If both units have modern headers we don't care | |
310 | * about the priorities */ | |
311 | if ((!s->sysv_path || s->sysv_has_lsb) && | |
312 | (!t->sysv_path || t->sysv_has_lsb)) | |
313 | continue; | |
314 | ||
315 | special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels); | |
316 | special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels); | |
317 | ||
318 | if (special_t && !special_s) | |
319 | d = UNIT_AFTER; | |
320 | else if (special_s && !special_t) | |
321 | d = UNIT_BEFORE; | |
322 | else if (t->sysv_start_priority < s->sysv_start_priority) | |
323 | d = UNIT_AFTER; | |
324 | else if (t->sysv_start_priority > s->sysv_start_priority) | |
325 | d = UNIT_BEFORE; | |
326 | else | |
327 | continue; | |
328 | ||
329 | /* FIXME: Maybe we should compare the name here lexicographically? */ | |
330 | ||
331 | if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0) | |
332 | return r; | |
333 | } | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
338 | static ExecCommand *exec_command_new(const char *path, const char *arg1) { | |
339 | ExecCommand *c; | |
340 | ||
341 | if (!(c = new0(ExecCommand, 1))) | |
342 | return NULL; | |
343 | ||
344 | if (!(c->path = strdup(path))) { | |
345 | free(c); | |
346 | return NULL; | |
347 | } | |
348 | ||
349 | if (!(c->argv = strv_new(path, arg1, NULL))) { | |
350 | free(c->path); | |
351 | free(c); | |
352 | return NULL; | |
353 | } | |
354 | ||
355 | return c; | |
356 | } | |
357 | ||
358 | static int sysv_exec_commands(Service *s) { | |
359 | ExecCommand *c; | |
360 | ||
361 | assert(s); | |
362 | assert(s->sysv_path); | |
363 | ||
364 | if (!(c = exec_command_new(s->sysv_path, "start"))) | |
365 | return -ENOMEM; | |
366 | exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c); | |
367 | ||
368 | if (!(c = exec_command_new(s->sysv_path, "stop"))) | |
369 | return -ENOMEM; | |
370 | exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c); | |
371 | ||
372 | if (!(c = exec_command_new(s->sysv_path, "reload"))) | |
373 | return -ENOMEM; | |
374 | exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c); | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
379 | static int service_load_sysv_path(Service *s, const char *path) { | |
380 | FILE *f; | |
381 | Unit *u; | |
382 | unsigned line = 0; | |
383 | int r; | |
384 | enum { | |
385 | NORMAL, | |
386 | DESCRIPTION, | |
387 | LSB, | |
388 | LSB_DESCRIPTION | |
389 | } state = NORMAL; | |
390 | ||
391 | assert(s); | |
392 | assert(path); | |
393 | ||
394 | u = UNIT(s); | |
395 | ||
396 | if (!(f = fopen(path, "re"))) { | |
397 | r = errno == ENOENT ? 0 : -errno; | |
398 | goto finish; | |
399 | } | |
400 | ||
401 | free(s->sysv_path); | |
402 | if (!(s->sysv_path = strdup(path))) { | |
403 | r = -ENOMEM; | |
404 | goto finish; | |
405 | } | |
406 | ||
407 | while (!feof(f)) { | |
408 | char l[LINE_MAX], *t; | |
409 | ||
410 | if (!fgets(l, sizeof(l), f)) { | |
411 | if (feof(f)) | |
412 | break; | |
413 | ||
414 | r = -errno; | |
415 | log_error("Failed to read configuration file '%s': %s", path, strerror(-r)); | |
416 | goto finish; | |
417 | } | |
418 | ||
419 | line++; | |
420 | ||
421 | t = strstrip(l); | |
422 | if (*t != '#') | |
423 | continue; | |
424 | ||
425 | if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) { | |
426 | state = LSB; | |
427 | s->sysv_has_lsb = true; | |
428 | continue; | |
429 | } | |
430 | ||
431 | if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) { | |
432 | state = NORMAL; | |
433 | continue; | |
434 | } | |
435 | ||
436 | t++; | |
437 | t += strspn(t, WHITESPACE); | |
438 | ||
439 | if (state == NORMAL) { | |
440 | ||
441 | /* Try to parse Red Hat style chkconfig headers */ | |
442 | ||
443 | if (startswith_no_case(t, "chkconfig:")) { | |
444 | int start_priority; | |
445 | char runlevels[16], *k; | |
446 | ||
447 | state = NORMAL; | |
448 | ||
449 | if (sscanf(t+10, "%15s %i %*i", | |
450 | runlevels, | |
451 | &start_priority) != 2) { | |
452 | ||
453 | log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line); | |
454 | continue; | |
455 | } | |
456 | ||
457 | /* A start priority gathered from the | |
458 | * symlink farms is preferred over the | |
459 | * data from the LSB header. */ | |
460 | if (start_priority < 0 || start_priority > 99) | |
461 | log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line); | |
462 | else if (s->sysv_start_priority < 0) | |
463 | s->sysv_start_priority = start_priority; | |
464 | ||
465 | char_array_0(runlevels); | |
466 | k = delete_chars(runlevels, WHITESPACE "-"); | |
467 | ||
468 | if (k[0]) { | |
469 | char *d; | |
470 | ||
471 | if (!(d = strdup(k))) { | |
472 | r = -ENOMEM; | |
473 | goto finish; | |
474 | } | |
475 | ||
476 | free(s->sysv_runlevels); | |
477 | s->sysv_runlevels = d; | |
478 | } | |
479 | ||
480 | } else if (startswith_no_case(t, "description:") && | |
481 | !u->meta.description) { | |
482 | ||
483 | size_t k = strlen(t); | |
484 | char *d; | |
485 | ||
486 | if (t[k-1] == '\\') { | |
487 | state = DESCRIPTION; | |
488 | t[k-1] = 0; | |
489 | } | |
490 | ||
491 | if (!(d = strappend("LSB: ", strstrip(t+12)))) { | |
492 | r = -ENOMEM; | |
493 | goto finish; | |
494 | } | |
495 | ||
496 | free(u->meta.description); | |
497 | u->meta.description = d; | |
498 | ||
499 | } else if (startswith_no_case(t, "pidfile:")) { | |
500 | ||
501 | char *fn; | |
502 | ||
503 | state = NORMAL; | |
504 | ||
505 | fn = strstrip(t+8); | |
506 | if (!path_is_absolute(fn)) { | |
507 | log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line); | |
508 | continue; | |
509 | } | |
510 | ||
511 | if (!(fn = strdup(fn))) { | |
512 | r = -ENOMEM; | |
513 | goto finish; | |
514 | } | |
515 | ||
516 | free(s->pid_file); | |
517 | s->pid_file = fn; | |
518 | } | |
519 | ||
520 | } else if (state == DESCRIPTION) { | |
521 | ||
522 | /* Try to parse Red Hat style description | |
523 | * continuation */ | |
524 | ||
525 | size_t k = strlen(t); | |
526 | char *d; | |
527 | ||
528 | if (t[k-1] == '\\') | |
529 | t[k-1] = 0; | |
530 | else | |
531 | state = NORMAL; | |
532 | ||
533 | assert(u->meta.description); | |
534 | if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) { | |
535 | r = -ENOMEM; | |
536 | goto finish; | |
537 | } | |
538 | ||
539 | free(u->meta.description); | |
540 | u->meta.description = d; | |
541 | ||
542 | } else if (state == LSB || state == LSB_DESCRIPTION) { | |
543 | ||
544 | if (startswith_no_case(t, "Provides:")) { | |
545 | char *i, *w; | |
546 | size_t z; | |
547 | ||
548 | state = LSB; | |
549 | ||
550 | FOREACH_WORD_QUOTED(w, z, t+9, i) { | |
551 | char *n, *m; | |
552 | ||
553 | if (!(n = strndup(w, z))) { | |
554 | r = -ENOMEM; | |
555 | goto finish; | |
556 | } | |
557 | ||
558 | r = sysv_translate_facility(n, &m); | |
559 | free(n); | |
560 | ||
561 | if (r < 0) | |
562 | goto finish; | |
563 | ||
564 | if (r == 0) | |
565 | continue; | |
566 | ||
567 | if (unit_name_to_type(m) == UNIT_SERVICE) | |
568 | r = unit_add_name(u, m); | |
569 | else if (s->sysv_enabled) | |
570 | r = unit_add_two_dependencies_by_name_inverse(u, UNIT_AFTER, UNIT_WANTS, m, NULL, true); | |
571 | else | |
572 | r = unit_add_dependency_by_name_inverse(u, UNIT_AFTER, m, NULL, true); | |
573 | ||
574 | if (r < 0) | |
575 | log_error("[%s:%u] Failed to add LSB Provides name %s: %s. Ignoring.", path, line, m, strerror(-r)); | |
576 | ||
577 | free(m); | |
578 | } | |
579 | ||
580 | } else if (startswith_no_case(t, "Required-Start:") || | |
581 | startswith_no_case(t, "Should-Start:") || | |
582 | startswith_no_case(t, "X-Start-Before:") || | |
583 | startswith_no_case(t, "X-Start-After:")) { | |
584 | char *i, *w; | |
585 | size_t z; | |
586 | ||
587 | state = LSB; | |
588 | ||
589 | FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) { | |
590 | char *n, *m; | |
591 | ||
592 | if (!(n = strndup(w, z))) { | |
593 | r = -ENOMEM; | |
594 | goto finish; | |
595 | } | |
596 | ||
597 | r = sysv_translate_facility(n, &m); | |
598 | free(n); | |
599 | ||
600 | if (r < 0) | |
601 | goto finish; | |
602 | ||
603 | if (r == 0) | |
604 | continue; | |
605 | ||
606 | r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true); | |
607 | ||
608 | if (r < 0) | |
609 | log_error("Failed to add dependency on %s, ignoring: %s", m, strerror(-r)); | |
610 | ||
611 | free(m); | |
612 | } | |
613 | } else if (startswith_no_case(t, "Default-Start:")) { | |
614 | char *k, *d; | |
615 | ||
616 | state = LSB; | |
617 | ||
618 | k = delete_chars(t+14, WHITESPACE "-"); | |
619 | ||
620 | if (k[0] != 0) { | |
621 | if (!(d = strdup(k))) { | |
622 | r = -ENOMEM; | |
623 | goto finish; | |
624 | } | |
625 | ||
626 | free(s->sysv_runlevels); | |
627 | s->sysv_runlevels = d; | |
628 | } | |
629 | ||
630 | } else if (startswith_no_case(t, "Description:") && | |
631 | !u->meta.description) { | |
632 | char *d; | |
633 | ||
634 | /* We use the long description only if | |
635 | * no short description is set. */ | |
636 | ||
637 | state = LSB_DESCRIPTION; | |
638 | ||
639 | if (!(d = strappend("LSB: ", strstrip(t+12)))) { | |
640 | r = -ENOMEM; | |
641 | goto finish; | |
642 | } | |
643 | ||
644 | free(u->meta.description); | |
645 | u->meta.description = d; | |
646 | ||
647 | } else if (startswith_no_case(t, "Short-Description:")) { | |
648 | char *d; | |
649 | ||
650 | state = LSB; | |
651 | ||
652 | if (!(d = strappend("LSB: ", strstrip(t+18)))) { | |
653 | r = -ENOMEM; | |
654 | goto finish; | |
655 | } | |
656 | ||
657 | free(u->meta.description); | |
658 | u->meta.description = d; | |
659 | ||
660 | } else if (startswith_no_case(t, "X-Interactive:")) { | |
661 | int b; | |
662 | ||
663 | if ((b = parse_boolean(strstrip(t+14))) < 0) { | |
664 | log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line); | |
665 | continue; | |
666 | } | |
667 | ||
668 | if (b) | |
669 | s->exec_context.std_input = EXEC_INPUT_TTY; | |
670 | else | |
671 | s->exec_context.std_input = EXEC_INPUT_NULL; | |
672 | ||
673 | } else if (state == LSB_DESCRIPTION) { | |
674 | ||
675 | if (startswith(l, "#\t") || startswith(l, "# ")) { | |
676 | char *d; | |
677 | ||
678 | assert(u->meta.description); | |
679 | if (asprintf(&d, "%s %s", u->meta.description, t) < 0) { | |
680 | r = -ENOMEM; | |
681 | goto finish; | |
682 | } | |
683 | ||
684 | free(u->meta.description); | |
685 | u->meta.description = d; | |
686 | } else | |
687 | state = LSB; | |
688 | } | |
689 | } | |
690 | } | |
691 | ||
692 | if ((r = sysv_exec_commands(s)) < 0) | |
693 | goto finish; | |
694 | ||
695 | if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) { | |
696 | /* If there a runlevels configured for this service | |
697 | * but none of the standard ones, then we assume this | |
698 | * is some special kind of service (which might be | |
699 | * needed for early boot) and don't create any links | |
700 | * to it. */ | |
701 | ||
702 | s->meta.default_dependencies = false; | |
703 | ||
704 | /* Don't timeout special services during boot (like fsck) */ | |
705 | s->timeout_usec = 0; | |
706 | } | |
707 | ||
708 | /* Special setting for all SysV services */ | |
709 | s->type = SERVICE_FORKING; | |
710 | s->remain_after_exit = true; | |
711 | s->restart = SERVICE_ONCE; | |
712 | s->exec_context.std_output = | |
713 | (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY) | |
714 | ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL; | |
715 | s->exec_context.kill_mode = KILL_PROCESS_GROUP; | |
716 | ||
717 | u->meta.load_state = UNIT_LOADED; | |
718 | r = 0; | |
719 | ||
720 | finish: | |
721 | ||
722 | if (f) | |
723 | fclose(f); | |
724 | ||
725 | return r; | |
726 | } | |
727 | ||
728 | static int service_load_sysv_name(Service *s, const char *name) { | |
729 | char **p; | |
730 | ||
731 | assert(s); | |
732 | assert(name); | |
733 | ||
734 | /* For SysV services we strip the boot. or .sh | |
735 | * prefixes/suffixes. */ | |
736 | if (startswith(name, "boot.") || | |
737 | endswith(name, ".sh.service")) | |
738 | return -ENOENT; | |
739 | ||
740 | STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) { | |
741 | char *path; | |
742 | int r; | |
743 | ||
744 | if (asprintf(&path, "%s/%s", *p, name) < 0) | |
745 | return -ENOMEM; | |
746 | ||
747 | assert(endswith(path, ".service")); | |
748 | path[strlen(path)-8] = 0; | |
749 | ||
750 | r = service_load_sysv_path(s, path); | |
751 | ||
752 | if (r >= 0 && s->meta.load_state == UNIT_STUB) { | |
753 | /* Try Debian style xxx.sh source'able init scripts */ | |
754 | strcat(path, ".sh"); | |
755 | r = service_load_sysv_path(s, path); | |
756 | } | |
757 | ||
758 | free(path); | |
759 | ||
760 | if (r >= 0 && s->meta.load_state == UNIT_STUB) { | |
761 | /* Try SUSE style boot.xxx init scripts */ | |
762 | ||
763 | if (asprintf(&path, "%s/boot.%s", *p, name) < 0) | |
764 | return -ENOMEM; | |
765 | ||
766 | path[strlen(path)-8] = 0; | |
767 | r = service_load_sysv_path(s, path); | |
768 | free(path); | |
769 | } | |
770 | ||
771 | if (r < 0) | |
772 | return r; | |
773 | ||
774 | if ((s->meta.load_state != UNIT_STUB)) | |
775 | break; | |
776 | } | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
781 | static int service_load_sysv(Service *s) { | |
782 | const char *t; | |
783 | Iterator i; | |
784 | int r; | |
785 | ||
786 | assert(s); | |
787 | ||
788 | /* Load service data from SysV init scripts, preferably with | |
789 | * LSB headers ... */ | |
790 | ||
791 | if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path)) | |
792 | return 0; | |
793 | ||
794 | if ((t = s->meta.id)) | |
795 | if ((r = service_load_sysv_name(s, t)) < 0) | |
796 | return r; | |
797 | ||
798 | if (s->meta.load_state == UNIT_STUB) | |
799 | SET_FOREACH(t, s->meta.names, i) { | |
800 | if (t == s->meta.id) | |
801 | continue; | |
802 | ||
803 | if ((r = service_load_sysv_name(s, t)) < 0) | |
804 | return r; | |
805 | ||
806 | if (s->meta.load_state != UNIT_STUB) | |
807 | break; | |
808 | } | |
809 | ||
810 | return 0; | |
811 | } | |
812 | ||
813 | static int service_add_bus_name(Service *s) { | |
814 | char *n; | |
815 | int r; | |
816 | ||
817 | assert(s); | |
818 | assert(s->bus_name); | |
819 | ||
820 | if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0) | |
821 | return 0; | |
822 | ||
823 | r = unit_merge_by_name(UNIT(s), n); | |
824 | free(n); | |
825 | ||
826 | return r; | |
827 | } | |
828 | ||
829 | static int service_verify(Service *s) { | |
830 | assert(s); | |
831 | ||
832 | if (s->meta.load_state != UNIT_LOADED) | |
833 | return 0; | |
834 | ||
835 | if (!s->exec_command[SERVICE_EXEC_START]) { | |
836 | log_error("%s lacks ExecStart setting. Refusing.", s->meta.id); | |
837 | return -EINVAL; | |
838 | } | |
839 | ||
840 | if (s->type != SERVICE_ONESHOT && | |
841 | s->exec_command[SERVICE_EXEC_START]->command_next) { | |
842 | log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id); | |
843 | return -EINVAL; | |
844 | } | |
845 | ||
846 | if (s->type == SERVICE_DBUS && !s->bus_name) { | |
847 | log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id); | |
848 | return -EINVAL; | |
849 | } | |
850 | ||
851 | if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) { | |
852 | log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id); | |
853 | return -EINVAL; | |
854 | } | |
855 | ||
856 | return 0; | |
857 | } | |
858 | ||
859 | static int service_add_default_dependencies(Service *s) { | |
860 | int r; | |
861 | ||
862 | assert(s); | |
863 | ||
864 | /* Add a number of automatic dependencies useful for the | |
865 | * majority of services. */ | |
866 | ||
867 | /* First, pull in base system */ | |
868 | if (s->meta.manager->running_as == MANAGER_SYSTEM) { | |
869 | ||
870 | if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0) | |
871 | return r; | |
872 | ||
873 | } else if (s->meta.manager->running_as == MANAGER_SESSION) { | |
874 | ||
875 | if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0) | |
876 | return r; | |
877 | } | |
878 | ||
879 | /* Second, activate normal shutdown */ | |
880 | return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_SHUTDOWN_TARGET, NULL, true); | |
881 | } | |
882 | ||
883 | static int service_load(Unit *u) { | |
884 | int r; | |
885 | Service *s = SERVICE(u); | |
886 | ||
887 | assert(s); | |
888 | ||
889 | /* Load a .service file */ | |
890 | if ((r = unit_load_fragment(u)) < 0) | |
891 | return r; | |
892 | ||
893 | /* Load a classic init script as a fallback, if we couldn't find anything */ | |
894 | if (u->meta.load_state == UNIT_STUB) | |
895 | if ((r = service_load_sysv(s)) < 0) | |
896 | return r; | |
897 | ||
898 | /* Still nothing found? Then let's give up */ | |
899 | if (u->meta.load_state == UNIT_STUB) | |
900 | return -ENOENT; | |
901 | ||
902 | /* We were able to load something, then let's add in the | |
903 | * dropin directories. */ | |
904 | if ((r = unit_load_dropin(unit_follow_merge(u))) < 0) | |
905 | return r; | |
906 | ||
907 | /* This is a new unit? Then let's add in some extras */ | |
908 | if (u->meta.load_state == UNIT_LOADED) { | |
909 | if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0) | |
910 | return r; | |
911 | ||
912 | if ((r = unit_add_default_cgroup(u)) < 0) | |
913 | return r; | |
914 | ||
915 | if ((r = sysv_fix_order(s)) < 0) | |
916 | return r; | |
917 | ||
918 | if (s->bus_name) { | |
919 | if ((r = service_add_bus_name(s)) < 0) | |
920 | return r; | |
921 | ||
922 | if ((r = unit_watch_bus_name(u, s->bus_name)) < 0) | |
923 | return r; | |
924 | } | |
925 | ||
926 | if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE) | |
927 | s->notify_access = NOTIFY_MAIN; | |
928 | ||
929 | if (s->type == SERVICE_DBUS || s->bus_name) | |
930 | if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0) | |
931 | return r; | |
932 | ||
933 | if (s->meta.default_dependencies) | |
934 | if ((r = service_add_default_dependencies(s)) < 0) | |
935 | return r; | |
936 | } | |
937 | ||
938 | return service_verify(s); | |
939 | } | |
940 | ||
941 | static void service_dump(Unit *u, FILE *f, const char *prefix) { | |
942 | ||
943 | ServiceExecCommand c; | |
944 | Service *s = SERVICE(u); | |
945 | const char *prefix2; | |
946 | char *p2; | |
947 | ||
948 | assert(s); | |
949 | ||
950 | p2 = strappend(prefix, "\t"); | |
951 | prefix2 = p2 ? p2 : prefix; | |
952 | ||
953 | fprintf(f, | |
954 | "%sService State: %s\n" | |
955 | "%sPermissionsStartOnly: %s\n" | |
956 | "%sRootDirectoryStartOnly: %s\n" | |
957 | "%sRemainAfterExit: %s\n" | |
958 | "%sType: %s\n" | |
959 | "%sRestart: %s\n" | |
960 | "%sNotifyAccess: %s\n", | |
961 | prefix, service_state_to_string(s->state), | |
962 | prefix, yes_no(s->permissions_start_only), | |
963 | prefix, yes_no(s->root_directory_start_only), | |
964 | prefix, yes_no(s->remain_after_exit), | |
965 | prefix, service_type_to_string(s->type), | |
966 | prefix, service_restart_to_string(s->restart), | |
967 | prefix, notify_access_to_string(s->notify_access)); | |
968 | ||
969 | if (s->control_pid > 0) | |
970 | fprintf(f, | |
971 | "%sControl PID: %lu\n", | |
972 | prefix, (unsigned long) s->control_pid); | |
973 | ||
974 | if (s->main_pid > 0) | |
975 | fprintf(f, | |
976 | "%sMain PID: %lu\n", | |
977 | prefix, (unsigned long) s->main_pid); | |
978 | ||
979 | if (s->pid_file) | |
980 | fprintf(f, | |
981 | "%sPIDFile: %s\n", | |
982 | prefix, s->pid_file); | |
983 | ||
984 | if (s->bus_name) | |
985 | fprintf(f, | |
986 | "%sBusName: %s\n" | |
987 | "%sBus Name Good: %s\n", | |
988 | prefix, s->bus_name, | |
989 | prefix, yes_no(s->bus_name_good)); | |
990 | ||
991 | exec_context_dump(&s->exec_context, f, prefix); | |
992 | ||
993 | for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) { | |
994 | ||
995 | if (!s->exec_command[c]) | |
996 | continue; | |
997 | ||
998 | fprintf(f, "%s-> %s:\n", | |
999 | prefix, service_exec_command_to_string(c)); | |
1000 | ||
1001 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
1002 | } | |
1003 | ||
1004 | if (s->sysv_path) | |
1005 | fprintf(f, | |
1006 | "%sSysV Init Script Path: %s\n" | |
1007 | "%sSysV Init Script has LSB Header: %s\n", | |
1008 | prefix, s->sysv_path, | |
1009 | prefix, yes_no(s->sysv_has_lsb)); | |
1010 | ||
1011 | if (s->sysv_start_priority >= 0) | |
1012 | fprintf(f, | |
1013 | "%sSysVStartPriority: %i\n" | |
1014 | "%sSysVEnabled: %s\n", | |
1015 | prefix, s->sysv_start_priority, | |
1016 | prefix, yes_no(s->sysv_enabled)); | |
1017 | ||
1018 | if (s->sysv_runlevels) | |
1019 | fprintf(f, "%sSysVRunLevels: %s\n", | |
1020 | prefix, s->sysv_runlevels); | |
1021 | ||
1022 | if (s->status_text) | |
1023 | fprintf(f, "%sStatus Text: %s\n", | |
1024 | prefix, s->status_text); | |
1025 | ||
1026 | free(p2); | |
1027 | } | |
1028 | ||
1029 | static int service_load_pid_file(Service *s) { | |
1030 | char *k; | |
1031 | int r; | |
1032 | pid_t pid; | |
1033 | ||
1034 | assert(s); | |
1035 | ||
1036 | if (s->main_pid_known) | |
1037 | return 0; | |
1038 | ||
1039 | assert(s->main_pid <= 0); | |
1040 | ||
1041 | if (!s->pid_file) | |
1042 | return -ENOENT; | |
1043 | ||
1044 | if ((r = read_one_line_file(s->pid_file, &k)) < 0) | |
1045 | return r; | |
1046 | ||
1047 | r = parse_pid(k, &pid); | |
1048 | free(k); | |
1049 | ||
1050 | if (r < 0) | |
1051 | return r; | |
1052 | ||
1053 | if (kill(pid, 0) < 0 && errno != EPERM) { | |
1054 | log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.", | |
1055 | (unsigned long) pid, s->pid_file); | |
1056 | return -ESRCH; | |
1057 | } | |
1058 | ||
1059 | if ((r = service_set_main_pid(s, pid)) < 0) | |
1060 | return r; | |
1061 | ||
1062 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) | |
1063 | /* FIXME: we need to do something here */ | |
1064 | return r; | |
1065 | ||
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | static int service_get_sockets(Service *s, Set **_set) { | |
1070 | Set *set; | |
1071 | Iterator i; | |
1072 | char *t; | |
1073 | int r; | |
1074 | ||
1075 | assert(s); | |
1076 | assert(_set); | |
1077 | ||
1078 | if (s->socket_fd >= 0) | |
1079 | return 0; | |
1080 | ||
1081 | /* Collects all Socket objects that belong to this | |
1082 | * service. Note that a service might have multiple sockets | |
1083 | * via multiple names. */ | |
1084 | ||
1085 | if (!(set = set_new(NULL, NULL))) | |
1086 | return -ENOMEM; | |
1087 | ||
1088 | SET_FOREACH(t, s->meta.names, i) { | |
1089 | char *k; | |
1090 | Unit *p; | |
1091 | ||
1092 | /* Look for all socket objects that go by any of our | |
1093 | * units and collect their fds */ | |
1094 | ||
1095 | if (!(k = unit_name_change_suffix(t, ".socket"))) { | |
1096 | r = -ENOMEM; | |
1097 | goto fail; | |
1098 | } | |
1099 | ||
1100 | p = manager_get_unit(s->meta.manager, k); | |
1101 | free(k); | |
1102 | ||
1103 | if (!p) | |
1104 | continue; | |
1105 | ||
1106 | if ((r = set_put(set, p)) < 0) | |
1107 | goto fail; | |
1108 | } | |
1109 | ||
1110 | *_set = set; | |
1111 | return 0; | |
1112 | ||
1113 | fail: | |
1114 | set_free(set); | |
1115 | return r; | |
1116 | } | |
1117 | ||
1118 | static int service_notify_sockets_dead(Service *s) { | |
1119 | Iterator i; | |
1120 | Set *set; | |
1121 | Socket *sock; | |
1122 | int r; | |
1123 | ||
1124 | assert(s); | |
1125 | ||
1126 | if (s->socket_fd >= 0) | |
1127 | return 0; | |
1128 | ||
1129 | /* Notifies all our sockets when we die */ | |
1130 | if ((r = service_get_sockets(s, &set)) < 0) | |
1131 | return r; | |
1132 | ||
1133 | SET_FOREACH(sock, set, i) | |
1134 | socket_notify_service_dead(sock); | |
1135 | ||
1136 | set_free(set); | |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | static void service_set_state(Service *s, ServiceState state) { | |
1142 | ServiceState old_state; | |
1143 | assert(s); | |
1144 | ||
1145 | old_state = s->state; | |
1146 | s->state = state; | |
1147 | ||
1148 | if (state != SERVICE_START_PRE && | |
1149 | state != SERVICE_START && | |
1150 | state != SERVICE_START_POST && | |
1151 | state != SERVICE_RELOAD && | |
1152 | state != SERVICE_STOP && | |
1153 | state != SERVICE_STOP_SIGTERM && | |
1154 | state != SERVICE_STOP_SIGKILL && | |
1155 | state != SERVICE_STOP_POST && | |
1156 | state != SERVICE_FINAL_SIGTERM && | |
1157 | state != SERVICE_FINAL_SIGKILL && | |
1158 | state != SERVICE_AUTO_RESTART) | |
1159 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
1160 | ||
1161 | if (state != SERVICE_START && | |
1162 | state != SERVICE_START_POST && | |
1163 | state != SERVICE_RUNNING && | |
1164 | state != SERVICE_RELOAD && | |
1165 | state != SERVICE_STOP && | |
1166 | state != SERVICE_STOP_SIGTERM && | |
1167 | state != SERVICE_STOP_SIGKILL) | |
1168 | service_unwatch_main_pid(s); | |
1169 | ||
1170 | if (state != SERVICE_START_PRE && | |
1171 | state != SERVICE_START && | |
1172 | state != SERVICE_START_POST && | |
1173 | state != SERVICE_RELOAD && | |
1174 | state != SERVICE_STOP && | |
1175 | state != SERVICE_STOP_SIGTERM && | |
1176 | state != SERVICE_STOP_SIGKILL && | |
1177 | state != SERVICE_STOP_POST && | |
1178 | state != SERVICE_FINAL_SIGTERM && | |
1179 | state != SERVICE_FINAL_SIGKILL) { | |
1180 | service_unwatch_control_pid(s); | |
1181 | s->control_command = NULL; | |
1182 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
1183 | } | |
1184 | ||
1185 | if (state == SERVICE_DEAD || | |
1186 | state == SERVICE_STOP || | |
1187 | state == SERVICE_STOP_SIGTERM || | |
1188 | state == SERVICE_STOP_SIGKILL || | |
1189 | state == SERVICE_STOP_POST || | |
1190 | state == SERVICE_FINAL_SIGTERM || | |
1191 | state == SERVICE_FINAL_SIGKILL || | |
1192 | state == SERVICE_MAINTENANCE || | |
1193 | state == SERVICE_AUTO_RESTART) | |
1194 | service_notify_sockets_dead(s); | |
1195 | ||
1196 | if (state != SERVICE_START_PRE && | |
1197 | state != SERVICE_START && | |
1198 | state != SERVICE_START_POST && | |
1199 | state != SERVICE_RUNNING && | |
1200 | state != SERVICE_RELOAD && | |
1201 | state != SERVICE_STOP && | |
1202 | state != SERVICE_STOP_SIGTERM && | |
1203 | state != SERVICE_STOP_SIGKILL && | |
1204 | state != SERVICE_STOP_POST && | |
1205 | state != SERVICE_FINAL_SIGTERM && | |
1206 | state != SERVICE_FINAL_SIGKILL && | |
1207 | !(state == SERVICE_DEAD && s->meta.job)) { | |
1208 | service_close_socket_fd(s); | |
1209 | service_connection_unref(s); | |
1210 | } | |
1211 | ||
1212 | /* For the inactive states unit_notify() will trim the cgroup, | |
1213 | * but for exit we have to do that ourselves... */ | |
1214 | if (state == SERVICE_EXITED) | |
1215 | cgroup_bonding_trim_list(s->meta.cgroup_bondings, true); | |
1216 | ||
1217 | if (old_state != state) | |
1218 | log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state)); | |
1219 | ||
1220 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); | |
1221 | } | |
1222 | ||
1223 | static int service_coldplug(Unit *u) { | |
1224 | Service *s = SERVICE(u); | |
1225 | int r; | |
1226 | ||
1227 | assert(s); | |
1228 | assert(s->state == SERVICE_DEAD); | |
1229 | ||
1230 | if (s->deserialized_state != s->state) { | |
1231 | ||
1232 | if (s->deserialized_state == SERVICE_START_PRE || | |
1233 | s->deserialized_state == SERVICE_START || | |
1234 | s->deserialized_state == SERVICE_START_POST || | |
1235 | s->deserialized_state == SERVICE_RELOAD || | |
1236 | s->deserialized_state == SERVICE_STOP || | |
1237 | s->deserialized_state == SERVICE_STOP_SIGTERM || | |
1238 | s->deserialized_state == SERVICE_STOP_SIGKILL || | |
1239 | s->deserialized_state == SERVICE_STOP_POST || | |
1240 | s->deserialized_state == SERVICE_FINAL_SIGTERM || | |
1241 | s->deserialized_state == SERVICE_FINAL_SIGKILL || | |
1242 | s->deserialized_state == SERVICE_AUTO_RESTART) { | |
1243 | ||
1244 | if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) { | |
1245 | usec_t k; | |
1246 | ||
1247 | k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec; | |
1248 | ||
1249 | if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0) | |
1250 | return r; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | if ((s->deserialized_state == SERVICE_START && | |
1255 | (s->type == SERVICE_FORKING || | |
1256 | s->type == SERVICE_DBUS || | |
1257 | s->type == SERVICE_ONESHOT || | |
1258 | s->type == SERVICE_NOTIFY)) || | |
1259 | s->deserialized_state == SERVICE_START_POST || | |
1260 | s->deserialized_state == SERVICE_RUNNING || | |
1261 | s->deserialized_state == SERVICE_RELOAD || | |
1262 | s->deserialized_state == SERVICE_STOP || | |
1263 | s->deserialized_state == SERVICE_STOP_SIGTERM || | |
1264 | s->deserialized_state == SERVICE_STOP_SIGKILL) | |
1265 | if (s->main_pid > 0) | |
1266 | if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0) | |
1267 | return r; | |
1268 | ||
1269 | if (s->deserialized_state == SERVICE_START_PRE || | |
1270 | s->deserialized_state == SERVICE_START || | |
1271 | s->deserialized_state == SERVICE_START_POST || | |
1272 | s->deserialized_state == SERVICE_RELOAD || | |
1273 | s->deserialized_state == SERVICE_STOP || | |
1274 | s->deserialized_state == SERVICE_STOP_SIGTERM || | |
1275 | s->deserialized_state == SERVICE_STOP_SIGKILL || | |
1276 | s->deserialized_state == SERVICE_STOP_POST || | |
1277 | s->deserialized_state == SERVICE_FINAL_SIGTERM || | |
1278 | s->deserialized_state == SERVICE_FINAL_SIGKILL) | |
1279 | if (s->control_pid > 0) | |
1280 | if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0) | |
1281 | return r; | |
1282 | ||
1283 | service_set_state(s, s->deserialized_state); | |
1284 | } | |
1285 | ||
1286 | return 0; | |
1287 | } | |
1288 | ||
1289 | static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) { | |
1290 | Iterator i; | |
1291 | int r; | |
1292 | int *rfds = NULL; | |
1293 | unsigned rn_fds = 0; | |
1294 | Set *set; | |
1295 | Socket *sock; | |
1296 | ||
1297 | assert(s); | |
1298 | assert(fds); | |
1299 | assert(n_fds); | |
1300 | ||
1301 | if (s->socket_fd >= 0) | |
1302 | return 0; | |
1303 | ||
1304 | if ((r = service_get_sockets(s, &set)) < 0) | |
1305 | return r; | |
1306 | ||
1307 | SET_FOREACH(sock, set, i) { | |
1308 | int *cfds; | |
1309 | unsigned cn_fds; | |
1310 | ||
1311 | if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0) | |
1312 | goto fail; | |
1313 | ||
1314 | if (!cfds) | |
1315 | continue; | |
1316 | ||
1317 | if (!rfds) { | |
1318 | rfds = cfds; | |
1319 | rn_fds = cn_fds; | |
1320 | } else { | |
1321 | int *t; | |
1322 | ||
1323 | if (!(t = new(int, rn_fds+cn_fds))) { | |
1324 | free(cfds); | |
1325 | r = -ENOMEM; | |
1326 | goto fail; | |
1327 | } | |
1328 | ||
1329 | memcpy(t, rfds, rn_fds); | |
1330 | memcpy(t+rn_fds, cfds, cn_fds); | |
1331 | free(rfds); | |
1332 | free(cfds); | |
1333 | ||
1334 | rfds = t; | |
1335 | rn_fds = rn_fds+cn_fds; | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | *fds = rfds; | |
1340 | *n_fds = rn_fds; | |
1341 | ||
1342 | set_free(set); | |
1343 | ||
1344 | return 0; | |
1345 | ||
1346 | fail: | |
1347 | set_free(set); | |
1348 | free(rfds); | |
1349 | ||
1350 | return r; | |
1351 | } | |
1352 | ||
1353 | static int service_spawn( | |
1354 | Service *s, | |
1355 | ExecCommand *c, | |
1356 | bool timeout, | |
1357 | bool pass_fds, | |
1358 | bool apply_permissions, | |
1359 | bool apply_chroot, | |
1360 | bool apply_tty_stdin, | |
1361 | bool set_notify_socket, | |
1362 | pid_t *_pid) { | |
1363 | ||
1364 | pid_t pid; | |
1365 | int r; | |
1366 | int *fds = NULL, *fdsbuf = NULL; | |
1367 | unsigned n_fds = 0, n_env = 0; | |
1368 | char **argv = NULL, **final_env = NULL, **our_env = NULL; | |
1369 | ||
1370 | assert(s); | |
1371 | assert(c); | |
1372 | assert(_pid); | |
1373 | ||
1374 | if (pass_fds || | |
1375 | s->exec_context.std_input == EXEC_INPUT_SOCKET || | |
1376 | s->exec_context.std_output == EXEC_OUTPUT_SOCKET || | |
1377 | s->exec_context.std_error == EXEC_OUTPUT_SOCKET) { | |
1378 | ||
1379 | if (s->socket_fd >= 0) { | |
1380 | fds = &s->socket_fd; | |
1381 | n_fds = 1; | |
1382 | } else { | |
1383 | if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0) | |
1384 | goto fail; | |
1385 | ||
1386 | fds = fdsbuf; | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | if (timeout && s->timeout_usec) { | |
1391 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) | |
1392 | goto fail; | |
1393 | } else | |
1394 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
1395 | ||
1396 | if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) { | |
1397 | r = -ENOMEM; | |
1398 | goto fail; | |
1399 | } | |
1400 | ||
1401 | if (!(our_env = new0(char*, 3))) { | |
1402 | r = -ENOMEM; | |
1403 | goto fail; | |
1404 | } | |
1405 | ||
1406 | if (set_notify_socket) | |
1407 | if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) { | |
1408 | r = -ENOMEM; | |
1409 | goto fail; | |
1410 | } | |
1411 | ||
1412 | if (s->main_pid > 0) | |
1413 | if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) { | |
1414 | r = -ENOMEM; | |
1415 | goto fail; | |
1416 | } | |
1417 | ||
1418 | if (!(final_env = strv_env_merge(2, | |
1419 | s->meta.manager->environment, | |
1420 | our_env, | |
1421 | NULL))) { | |
1422 | r = -ENOMEM; | |
1423 | goto fail; | |
1424 | } | |
1425 | ||
1426 | r = exec_spawn(c, | |
1427 | argv, | |
1428 | &s->exec_context, | |
1429 | fds, n_fds, | |
1430 | final_env, | |
1431 | apply_permissions, | |
1432 | apply_chroot, | |
1433 | apply_tty_stdin, | |
1434 | s->meta.manager->confirm_spawn, | |
1435 | s->meta.cgroup_bondings, | |
1436 | &pid); | |
1437 | ||
1438 | if (r < 0) | |
1439 | goto fail; | |
1440 | ||
1441 | ||
1442 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) | |
1443 | /* FIXME: we need to do something here */ | |
1444 | goto fail; | |
1445 | ||
1446 | free(fdsbuf); | |
1447 | strv_free(argv); | |
1448 | strv_free(our_env); | |
1449 | strv_free(final_env); | |
1450 | ||
1451 | *_pid = pid; | |
1452 | ||
1453 | return 0; | |
1454 | ||
1455 | fail: | |
1456 | free(fdsbuf); | |
1457 | strv_free(argv); | |
1458 | strv_free(our_env); | |
1459 | strv_free(final_env); | |
1460 | ||
1461 | if (timeout) | |
1462 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
1463 | ||
1464 | return r; | |
1465 | } | |
1466 | ||
1467 | static int main_pid_good(Service *s) { | |
1468 | assert(s); | |
1469 | ||
1470 | /* Returns 0 if the pid is dead, 1 if it is good, -1 if we | |
1471 | * don't know */ | |
1472 | ||
1473 | /* If we know the pid file, then lets just check if it is | |
1474 | * still valid */ | |
1475 | if (s->main_pid_known) | |
1476 | return s->main_pid > 0; | |
1477 | ||
1478 | /* We don't know the pid */ | |
1479 | return -EAGAIN; | |
1480 | } | |
1481 | ||
1482 | static int control_pid_good(Service *s) { | |
1483 | assert(s); | |
1484 | ||
1485 | return s->control_pid > 0; | |
1486 | } | |
1487 | ||
1488 | static int cgroup_good(Service *s) { | |
1489 | int r; | |
1490 | ||
1491 | assert(s); | |
1492 | ||
1493 | if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0) | |
1494 | return r; | |
1495 | ||
1496 | return !r; | |
1497 | } | |
1498 | ||
1499 | static void service_enter_dead(Service *s, bool success, bool allow_restart) { | |
1500 | int r; | |
1501 | assert(s); | |
1502 | ||
1503 | if (!success) | |
1504 | s->failure = true; | |
1505 | ||
1506 | if (allow_restart && | |
1507 | !s->forbid_restart && | |
1508 | (s->restart == SERVICE_RESTART_ALWAYS || | |
1509 | (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) { | |
1510 | ||
1511 | if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0) | |
1512 | goto fail; | |
1513 | ||
1514 | service_set_state(s, SERVICE_AUTO_RESTART); | |
1515 | } else | |
1516 | service_set_state(s, s->failure ? SERVICE_MAINTENANCE : SERVICE_DEAD); | |
1517 | ||
1518 | s->forbid_restart = false; | |
1519 | ||
1520 | return; | |
1521 | ||
1522 | fail: | |
1523 | log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r)); | |
1524 | service_enter_dead(s, false, false); | |
1525 | } | |
1526 | ||
1527 | static void service_enter_signal(Service *s, ServiceState state, bool success); | |
1528 | ||
1529 | static void service_enter_stop_post(Service *s, bool success) { | |
1530 | int r; | |
1531 | assert(s); | |
1532 | ||
1533 | if (!success) | |
1534 | s->failure = true; | |
1535 | ||
1536 | service_unwatch_control_pid(s); | |
1537 | ||
1538 | s->control_command_id = SERVICE_EXEC_STOP_POST; | |
1539 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) { | |
1540 | if ((r = service_spawn(s, | |
1541 | s->control_command, | |
1542 | true, | |
1543 | false, | |
1544 | !s->permissions_start_only, | |
1545 | !s->root_directory_start_only, | |
1546 | true, | |
1547 | false, | |
1548 | &s->control_pid)) < 0) | |
1549 | goto fail; | |
1550 | ||
1551 | ||
1552 | service_set_state(s, SERVICE_STOP_POST); | |
1553 | } else | |
1554 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, true); | |
1555 | ||
1556 | return; | |
1557 | ||
1558 | fail: | |
1559 | log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r)); | |
1560 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
1561 | } | |
1562 | ||
1563 | static void service_enter_signal(Service *s, ServiceState state, bool success) { | |
1564 | int r; | |
1565 | bool sent = false; | |
1566 | ||
1567 | assert(s); | |
1568 | ||
1569 | if (!success) | |
1570 | s->failure = true; | |
1571 | ||
1572 | if (s->exec_context.kill_mode != KILL_NONE) { | |
1573 | int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL; | |
1574 | ||
1575 | if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) { | |
1576 | ||
1577 | if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) { | |
1578 | if (r != -EAGAIN && r != -ESRCH) | |
1579 | goto fail; | |
1580 | } else | |
1581 | sent = true; | |
1582 | } | |
1583 | ||
1584 | if (!sent) { | |
1585 | r = 0; | |
1586 | ||
1587 | if (s->main_pid > 0) { | |
1588 | if (kill(s->exec_context.kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH) | |
1589 | r = -errno; | |
1590 | else | |
1591 | sent = true; | |
1592 | } | |
1593 | ||
1594 | if (s->control_pid > 0) { | |
1595 | if (kill(s->exec_context.kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) | |
1596 | r = -errno; | |
1597 | else | |
1598 | sent = true; | |
1599 | } | |
1600 | ||
1601 | if (r < 0) | |
1602 | goto fail; | |
1603 | } | |
1604 | } | |
1605 | ||
1606 | if (sent && (s->main_pid > 0 || s->control_pid > 0)) { | |
1607 | if (s->timeout_usec > 0) | |
1608 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) | |
1609 | goto fail; | |
1610 | ||
1611 | service_set_state(s, state); | |
1612 | } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) | |
1613 | service_enter_stop_post(s, true); | |
1614 | else | |
1615 | service_enter_dead(s, true, true); | |
1616 | ||
1617 | return; | |
1618 | ||
1619 | fail: | |
1620 | log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r)); | |
1621 | ||
1622 | if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) | |
1623 | service_enter_stop_post(s, false); | |
1624 | else | |
1625 | service_enter_dead(s, false, true); | |
1626 | } | |
1627 | ||
1628 | static void service_enter_stop(Service *s, bool success) { | |
1629 | int r; | |
1630 | ||
1631 | assert(s); | |
1632 | ||
1633 | if (!success) | |
1634 | s->failure = true; | |
1635 | ||
1636 | service_unwatch_control_pid(s); | |
1637 | ||
1638 | s->control_command_id = SERVICE_EXEC_STOP; | |
1639 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) { | |
1640 | if ((r = service_spawn(s, | |
1641 | s->control_command, | |
1642 | true, | |
1643 | false, | |
1644 | !s->permissions_start_only, | |
1645 | !s->root_directory_start_only, | |
1646 | false, | |
1647 | false, | |
1648 | &s->control_pid)) < 0) | |
1649 | goto fail; | |
1650 | ||
1651 | service_set_state(s, SERVICE_STOP); | |
1652 | } else | |
1653 | service_enter_signal(s, SERVICE_STOP_SIGTERM, true); | |
1654 | ||
1655 | return; | |
1656 | ||
1657 | fail: | |
1658 | log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r)); | |
1659 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); | |
1660 | } | |
1661 | ||
1662 | static void service_enter_running(Service *s, bool success) { | |
1663 | int main_pid_ok, cgroup_ok; | |
1664 | assert(s); | |
1665 | ||
1666 | if (!success) | |
1667 | s->failure = true; | |
1668 | ||
1669 | main_pid_ok = main_pid_good(s); | |
1670 | cgroup_ok = cgroup_good(s); | |
1671 | ||
1672 | if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) && | |
1673 | (s->bus_name_good || s->type != SERVICE_DBUS)) | |
1674 | service_set_state(s, SERVICE_RUNNING); | |
1675 | else if (s->remain_after_exit) | |
1676 | service_set_state(s, SERVICE_EXITED); | |
1677 | else | |
1678 | service_enter_stop(s, true); | |
1679 | } | |
1680 | ||
1681 | static void service_enter_start_post(Service *s) { | |
1682 | int r; | |
1683 | assert(s); | |
1684 | ||
1685 | service_unwatch_control_pid(s); | |
1686 | ||
1687 | s->control_command_id = SERVICE_EXEC_START_POST; | |
1688 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) { | |
1689 | if ((r = service_spawn(s, | |
1690 | s->control_command, | |
1691 | true, | |
1692 | false, | |
1693 | !s->permissions_start_only, | |
1694 | !s->root_directory_start_only, | |
1695 | false, | |
1696 | false, | |
1697 | &s->control_pid)) < 0) | |
1698 | goto fail; | |
1699 | ||
1700 | service_set_state(s, SERVICE_START_POST); | |
1701 | } else | |
1702 | service_enter_running(s, true); | |
1703 | ||
1704 | return; | |
1705 | ||
1706 | fail: | |
1707 | log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r)); | |
1708 | service_enter_stop(s, false); | |
1709 | } | |
1710 | ||
1711 | static void service_enter_start(Service *s) { | |
1712 | pid_t pid; | |
1713 | int r; | |
1714 | ||
1715 | assert(s); | |
1716 | ||
1717 | assert(s->exec_command[SERVICE_EXEC_START]); | |
1718 | assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT); | |
1719 | ||
1720 | if (s->type == SERVICE_FORKING) | |
1721 | service_unwatch_control_pid(s); | |
1722 | else | |
1723 | service_unwatch_main_pid(s); | |
1724 | ||
1725 | s->control_command_id = SERVICE_EXEC_START; | |
1726 | s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
1727 | ||
1728 | if ((r = service_spawn(s, | |
1729 | s->control_command, | |
1730 | s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY, | |
1731 | true, | |
1732 | true, | |
1733 | true, | |
1734 | true, | |
1735 | s->notify_access != NOTIFY_NONE, | |
1736 | &pid)) < 0) | |
1737 | goto fail; | |
1738 | ||
1739 | if (s->type == SERVICE_SIMPLE) { | |
1740 | /* For simple services we immediately start | |
1741 | * the START_POST binaries. */ | |
1742 | ||
1743 | service_set_main_pid(s, pid); | |
1744 | service_enter_start_post(s); | |
1745 | ||
1746 | } else if (s->type == SERVICE_FORKING) { | |
1747 | ||
1748 | /* For forking services we wait until the start | |
1749 | * process exited. */ | |
1750 | ||
1751 | s->control_pid = pid; | |
1752 | service_set_state(s, SERVICE_START); | |
1753 | ||
1754 | } else if (s->type == SERVICE_ONESHOT || | |
1755 | s->type == SERVICE_DBUS || | |
1756 | s->type == SERVICE_NOTIFY) { | |
1757 | ||
1758 | /* For oneshot services we wait until the start | |
1759 | * process exited, too, but it is our main process. */ | |
1760 | ||
1761 | /* For D-Bus services we know the main pid right away, | |
1762 | * but wait for the bus name to appear on the | |
1763 | * bus. Notify services are similar. */ | |
1764 | ||
1765 | service_set_main_pid(s, pid); | |
1766 | service_set_state(s, SERVICE_START); | |
1767 | } else | |
1768 | assert_not_reached("Unknown service type"); | |
1769 | ||
1770 | return; | |
1771 | ||
1772 | fail: | |
1773 | log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r)); | |
1774 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
1775 | } | |
1776 | ||
1777 | static void service_enter_start_pre(Service *s) { | |
1778 | int r; | |
1779 | ||
1780 | assert(s); | |
1781 | ||
1782 | service_unwatch_control_pid(s); | |
1783 | ||
1784 | s->control_command_id = SERVICE_EXEC_START_PRE; | |
1785 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) { | |
1786 | if ((r = service_spawn(s, | |
1787 | s->control_command, | |
1788 | true, | |
1789 | false, | |
1790 | !s->permissions_start_only, | |
1791 | !s->root_directory_start_only, | |
1792 | true, | |
1793 | false, | |
1794 | &s->control_pid)) < 0) | |
1795 | goto fail; | |
1796 | ||
1797 | service_set_state(s, SERVICE_START_PRE); | |
1798 | } else | |
1799 | service_enter_start(s); | |
1800 | ||
1801 | return; | |
1802 | ||
1803 | fail: | |
1804 | log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r)); | |
1805 | service_enter_dead(s, false, true); | |
1806 | } | |
1807 | ||
1808 | static void service_enter_restart(Service *s) { | |
1809 | int r; | |
1810 | DBusError error; | |
1811 | ||
1812 | assert(s); | |
1813 | dbus_error_init(&error); | |
1814 | ||
1815 | service_enter_dead(s, true, false); | |
1816 | ||
1817 | if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL, NULL)) < 0) | |
1818 | goto fail; | |
1819 | ||
1820 | log_debug("%s scheduled restart job.", s->meta.id); | |
1821 | return; | |
1822 | ||
1823 | fail: | |
1824 | log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r)); | |
1825 | service_enter_dead(s, false, false); | |
1826 | ||
1827 | dbus_error_free(&error); | |
1828 | } | |
1829 | ||
1830 | static void service_enter_reload(Service *s) { | |
1831 | int r; | |
1832 | ||
1833 | assert(s); | |
1834 | ||
1835 | service_unwatch_control_pid(s); | |
1836 | ||
1837 | s->control_command_id = SERVICE_EXEC_RELOAD; | |
1838 | if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) { | |
1839 | if ((r = service_spawn(s, | |
1840 | s->control_command, | |
1841 | true, | |
1842 | false, | |
1843 | !s->permissions_start_only, | |
1844 | !s->root_directory_start_only, | |
1845 | false, | |
1846 | false, | |
1847 | &s->control_pid)) < 0) | |
1848 | goto fail; | |
1849 | ||
1850 | service_set_state(s, SERVICE_RELOAD); | |
1851 | } else | |
1852 | service_enter_running(s, true); | |
1853 | ||
1854 | return; | |
1855 | ||
1856 | fail: | |
1857 | log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r)); | |
1858 | service_enter_stop(s, false); | |
1859 | } | |
1860 | ||
1861 | static void service_run_next_control(Service *s, bool success) { | |
1862 | int r; | |
1863 | ||
1864 | assert(s); | |
1865 | assert(s->control_command); | |
1866 | assert(s->control_command->command_next); | |
1867 | ||
1868 | if (!success) | |
1869 | s->failure = true; | |
1870 | ||
1871 | assert(s->control_command_id != SERVICE_EXEC_START); | |
1872 | ||
1873 | s->control_command = s->control_command->command_next; | |
1874 | service_unwatch_control_pid(s); | |
1875 | ||
1876 | if ((r = service_spawn(s, | |
1877 | s->control_command, | |
1878 | true, | |
1879 | false, | |
1880 | !s->permissions_start_only, | |
1881 | !s->root_directory_start_only, | |
1882 | s->control_command_id == SERVICE_EXEC_START_PRE || | |
1883 | s->control_command_id == SERVICE_EXEC_STOP_POST, | |
1884 | false, | |
1885 | &s->control_pid)) < 0) | |
1886 | goto fail; | |
1887 | ||
1888 | return; | |
1889 | ||
1890 | fail: | |
1891 | log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r)); | |
1892 | ||
1893 | if (s->state == SERVICE_START_PRE) | |
1894 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
1895 | else if (s->state == SERVICE_STOP) | |
1896 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); | |
1897 | else if (s->state == SERVICE_STOP_POST) | |
1898 | service_enter_dead(s, false, true); | |
1899 | else | |
1900 | service_enter_stop(s, false); | |
1901 | } | |
1902 | ||
1903 | static void service_run_next_main(Service *s, bool success) { | |
1904 | pid_t pid; | |
1905 | int r; | |
1906 | ||
1907 | assert(s); | |
1908 | assert(s->control_command); | |
1909 | assert(s->control_command->command_next); | |
1910 | ||
1911 | if (!success) | |
1912 | s->failure = true; | |
1913 | ||
1914 | assert(s->control_command_id == SERVICE_EXEC_START); | |
1915 | assert(s->type == SERVICE_ONESHOT); | |
1916 | ||
1917 | s->control_command = s->control_command->command_next; | |
1918 | service_unwatch_main_pid(s); | |
1919 | ||
1920 | if ((r = service_spawn(s, | |
1921 | s->control_command, | |
1922 | false, | |
1923 | true, | |
1924 | true, | |
1925 | true, | |
1926 | true, | |
1927 | s->notify_access != NOTIFY_NONE, | |
1928 | &pid)) < 0) | |
1929 | goto fail; | |
1930 | ||
1931 | service_set_main_pid(s, pid); | |
1932 | ||
1933 | return; | |
1934 | ||
1935 | fail: | |
1936 | log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r)); | |
1937 | service_enter_stop(s, false); | |
1938 | } | |
1939 | ||
1940 | static int service_start(Unit *u) { | |
1941 | Service *s = SERVICE(u); | |
1942 | ||
1943 | assert(s); | |
1944 | ||
1945 | /* We cannot fulfill this request right now, try again later | |
1946 | * please! */ | |
1947 | if (s->state == SERVICE_STOP || | |
1948 | s->state == SERVICE_STOP_SIGTERM || | |
1949 | s->state == SERVICE_STOP_SIGKILL || | |
1950 | s->state == SERVICE_STOP_POST || | |
1951 | s->state == SERVICE_FINAL_SIGTERM || | |
1952 | s->state == SERVICE_FINAL_SIGKILL) | |
1953 | return -EAGAIN; | |
1954 | ||
1955 | /* Already on it! */ | |
1956 | if (s->state == SERVICE_START_PRE || | |
1957 | s->state == SERVICE_START || | |
1958 | s->state == SERVICE_START_POST) | |
1959 | return 0; | |
1960 | ||
1961 | assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTENANCE || s->state == SERVICE_AUTO_RESTART); | |
1962 | ||
1963 | /* Make sure we don't enter a busy loop of some kind. */ | |
1964 | if (!ratelimit_test(&s->ratelimit)) { | |
1965 | log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id); | |
1966 | return -ECANCELED; | |
1967 | } | |
1968 | ||
1969 | if ((s->exec_context.std_input == EXEC_INPUT_SOCKET || | |
1970 | s->exec_context.std_output == EXEC_OUTPUT_SOCKET || | |
1971 | s->exec_context.std_error == EXEC_OUTPUT_SOCKET) && | |
1972 | s->socket_fd < 0) { | |
1973 | log_warning("%s can only be started with a per-connection socket.", u->meta.id); | |
1974 | return -EINVAL; | |
1975 | } | |
1976 | ||
1977 | s->failure = false; | |
1978 | s->main_pid_known = false; | |
1979 | s->forbid_restart = false; | |
1980 | ||
1981 | service_enter_start_pre(s); | |
1982 | return 0; | |
1983 | } | |
1984 | ||
1985 | static int service_stop(Unit *u) { | |
1986 | Service *s = SERVICE(u); | |
1987 | ||
1988 | assert(s); | |
1989 | ||
1990 | /* This is a user request, so don't do restarts on this | |
1991 | * shutdown. */ | |
1992 | s->forbid_restart = true; | |
1993 | ||
1994 | /* Already on it */ | |
1995 | if (s->state == SERVICE_STOP || | |
1996 | s->state == SERVICE_STOP_SIGTERM || | |
1997 | s->state == SERVICE_STOP_SIGKILL || | |
1998 | s->state == SERVICE_STOP_POST || | |
1999 | s->state == SERVICE_FINAL_SIGTERM || | |
2000 | s->state == SERVICE_FINAL_SIGKILL) | |
2001 | return 0; | |
2002 | ||
2003 | /* Don't allow a restart */ | |
2004 | if (s->state == SERVICE_AUTO_RESTART) { | |
2005 | service_set_state(s, SERVICE_DEAD); | |
2006 | return 0; | |
2007 | } | |
2008 | ||
2009 | /* If there's already something running we go directly into | |
2010 | * kill mode. */ | |
2011 | if (s->state == SERVICE_START_PRE || | |
2012 | s->state == SERVICE_START || | |
2013 | s->state == SERVICE_START_POST || | |
2014 | s->state == SERVICE_RELOAD) { | |
2015 | service_enter_signal(s, SERVICE_STOP_SIGTERM, true); | |
2016 | return 0; | |
2017 | } | |
2018 | ||
2019 | assert(s->state == SERVICE_RUNNING || | |
2020 | s->state == SERVICE_EXITED); | |
2021 | ||
2022 | service_enter_stop(s, true); | |
2023 | return 0; | |
2024 | } | |
2025 | ||
2026 | static int service_reload(Unit *u) { | |
2027 | Service *s = SERVICE(u); | |
2028 | ||
2029 | assert(s); | |
2030 | ||
2031 | assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED); | |
2032 | ||
2033 | service_enter_reload(s); | |
2034 | return 0; | |
2035 | } | |
2036 | ||
2037 | static bool service_can_reload(Unit *u) { | |
2038 | Service *s = SERVICE(u); | |
2039 | ||
2040 | assert(s); | |
2041 | ||
2042 | return !!s->exec_command[SERVICE_EXEC_RELOAD]; | |
2043 | } | |
2044 | ||
2045 | static int service_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2046 | Service *s = SERVICE(u); | |
2047 | ||
2048 | assert(u); | |
2049 | assert(f); | |
2050 | assert(fds); | |
2051 | ||
2052 | unit_serialize_item(u, f, "state", service_state_to_string(s->state)); | |
2053 | unit_serialize_item(u, f, "failure", yes_no(s->failure)); | |
2054 | ||
2055 | if (s->control_pid > 0) | |
2056 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid); | |
2057 | ||
2058 | if (s->main_pid_known && s->main_pid > 0) | |
2059 | unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid); | |
2060 | ||
2061 | unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known)); | |
2062 | ||
2063 | if (s->status_text) | |
2064 | unit_serialize_item(u, f, "status-text", s->status_text); | |
2065 | ||
2066 | /* There's a minor uncleanliness here: if there are multiple | |
2067 | * commands attached here, we will start from the first one | |
2068 | * again */ | |
2069 | if (s->control_command_id >= 0) | |
2070 | unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id)); | |
2071 | ||
2072 | if (s->socket_fd >= 0) { | |
2073 | int copy; | |
2074 | ||
2075 | if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0) | |
2076 | return copy; | |
2077 | ||
2078 | unit_serialize_item_format(u, f, "socket-fd", "%i", copy); | |
2079 | } | |
2080 | ||
2081 | if (s->main_exec_status.pid > 0) { | |
2082 | unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid); | |
2083 | ||
2084 | if (s->main_exec_status.start_timestamp.realtime > 0) { | |
2085 | unit_serialize_item_format(u, f, "main-exec-status-start-realtime", | |
2086 | "%llu", (unsigned long long) s->main_exec_status.start_timestamp.realtime); | |
2087 | ||
2088 | unit_serialize_item_format(u, f, "main-exec-status-start-monotonic", | |
2089 | "%llu", (unsigned long long) s->main_exec_status.start_timestamp.monotonic); | |
2090 | } | |
2091 | ||
2092 | if (s->main_exec_status.exit_timestamp.realtime > 0) { | |
2093 | unit_serialize_item_format(u, f, "main-exec-status-exit-realtime", | |
2094 | "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.realtime); | |
2095 | unit_serialize_item_format(u, f, "main-exec-status-exit-monotonic", | |
2096 | "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.monotonic); | |
2097 | ||
2098 | unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code); | |
2099 | unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status); | |
2100 | } | |
2101 | } | |
2102 | ||
2103 | return 0; | |
2104 | } | |
2105 | ||
2106 | static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
2107 | Service *s = SERVICE(u); | |
2108 | ||
2109 | assert(u); | |
2110 | assert(key); | |
2111 | assert(value); | |
2112 | assert(fds); | |
2113 | ||
2114 | if (streq(key, "state")) { | |
2115 | ServiceState state; | |
2116 | ||
2117 | if ((state = service_state_from_string(value)) < 0) | |
2118 | log_debug("Failed to parse state value %s", value); | |
2119 | else | |
2120 | s->deserialized_state = state; | |
2121 | } else if (streq(key, "failure")) { | |
2122 | int b; | |
2123 | ||
2124 | if ((b = parse_boolean(value)) < 0) | |
2125 | log_debug("Failed to parse failure value %s", value); | |
2126 | else | |
2127 | s->failure = b || s->failure; | |
2128 | } else if (streq(key, "control-pid")) { | |
2129 | pid_t pid; | |
2130 | ||
2131 | if (parse_pid(value, &pid) < 0) | |
2132 | log_debug("Failed to parse control-pid value %s", value); | |
2133 | else | |
2134 | s->control_pid = pid; | |
2135 | } else if (streq(key, "main-pid")) { | |
2136 | pid_t pid; | |
2137 | ||
2138 | if (parse_pid(value, &pid) < 0) | |
2139 | log_debug("Failed to parse main-pid value %s", value); | |
2140 | else | |
2141 | service_set_main_pid(s, (pid_t) pid); | |
2142 | } else if (streq(key, "main-pid-known")) { | |
2143 | int b; | |
2144 | ||
2145 | if ((b = parse_boolean(value)) < 0) | |
2146 | log_debug("Failed to parse main-pid-known value %s", value); | |
2147 | else | |
2148 | s->main_pid_known = b; | |
2149 | } else if (streq(key, "status-text")) { | |
2150 | char *t; | |
2151 | ||
2152 | if ((t = strdup(value))) { | |
2153 | free(s->status_text); | |
2154 | s->status_text = t; | |
2155 | } | |
2156 | ||
2157 | } else if (streq(key, "control-command")) { | |
2158 | ServiceExecCommand id; | |
2159 | ||
2160 | if ((id = service_exec_command_from_string(value)) < 0) | |
2161 | log_debug("Failed to parse exec-command value %s", value); | |
2162 | else { | |
2163 | s->control_command_id = id; | |
2164 | s->control_command = s->exec_command[id]; | |
2165 | } | |
2166 | } else if (streq(key, "socket-fd")) { | |
2167 | int fd; | |
2168 | ||
2169 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2170 | log_debug("Failed to parse socket-fd value %s", value); | |
2171 | else { | |
2172 | ||
2173 | if (s->socket_fd >= 0) | |
2174 | close_nointr_nofail(s->socket_fd); | |
2175 | s->socket_fd = fdset_remove(fds, fd); | |
2176 | } | |
2177 | } else if (streq(key, "main-exec-status-pid")) { | |
2178 | pid_t pid; | |
2179 | ||
2180 | if (parse_pid(value, &pid) < 0) | |
2181 | log_debug("Failed to parse main-exec-status-pid value %s", value); | |
2182 | else | |
2183 | s->main_exec_status.pid = pid; | |
2184 | } else if (streq(key, "main-exec-status-code")) { | |
2185 | int i; | |
2186 | ||
2187 | if (safe_atoi(value, &i) < 0) | |
2188 | log_debug("Failed to parse main-exec-status-code value %s", value); | |
2189 | else | |
2190 | s->main_exec_status.code = i; | |
2191 | } else if (streq(key, "main-exec-status-status")) { | |
2192 | int i; | |
2193 | ||
2194 | if (safe_atoi(value, &i) < 0) | |
2195 | log_debug("Failed to parse main-exec-status-status value %s", value); | |
2196 | else | |
2197 | s->main_exec_status.status = i; | |
2198 | } else if (streq(key, "main-exec-status-start-realtime")) { | |
2199 | uint64_t k; | |
2200 | ||
2201 | if (safe_atou64(value, &k) < 0) | |
2202 | log_debug("Failed to parse main-exec-status-start-realtime value %s", value); | |
2203 | else | |
2204 | s->main_exec_status.start_timestamp.realtime = (usec_t) k; | |
2205 | } else if (streq(key, "main-exec-status-start-monotonic")) { | |
2206 | uint64_t k; | |
2207 | ||
2208 | if (safe_atou64(value, &k) < 0) | |
2209 | log_debug("Failed to parse main-exec-status-start-monotonic value %s", value); | |
2210 | else | |
2211 | s->main_exec_status.start_timestamp.monotonic = (usec_t) k; | |
2212 | } else if (streq(key, "main-exec-status-exit-realtime")) { | |
2213 | uint64_t k; | |
2214 | ||
2215 | if (safe_atou64(value, &k) < 0) | |
2216 | log_debug("Failed to parse main-exec-status-exit-realtime value %s", value); | |
2217 | else | |
2218 | s->main_exec_status.exit_timestamp.realtime = (usec_t) k; | |
2219 | } else if (streq(key, "main-exec-status-exit-monotonic")) { | |
2220 | uint64_t k; | |
2221 | ||
2222 | if (safe_atou64(value, &k) < 0) | |
2223 | log_debug("Failed to parse main-exec-status-exit-monotonic value %s", value); | |
2224 | else | |
2225 | s->main_exec_status.exit_timestamp.monotonic = (usec_t) k; | |
2226 | } else | |
2227 | log_debug("Unknown serialization key '%s'", key); | |
2228 | ||
2229 | return 0; | |
2230 | } | |
2231 | ||
2232 | static UnitActiveState service_active_state(Unit *u) { | |
2233 | assert(u); | |
2234 | ||
2235 | return state_translation_table[SERVICE(u)->state]; | |
2236 | } | |
2237 | ||
2238 | static const char *service_sub_state_to_string(Unit *u) { | |
2239 | assert(u); | |
2240 | ||
2241 | return service_state_to_string(SERVICE(u)->state); | |
2242 | } | |
2243 | ||
2244 | static bool service_check_gc(Unit *u) { | |
2245 | Service *s = SERVICE(u); | |
2246 | ||
2247 | assert(s); | |
2248 | ||
2249 | return !!s->sysv_path; | |
2250 | } | |
2251 | ||
2252 | static bool service_check_snapshot(Unit *u) { | |
2253 | Service *s = SERVICE(u); | |
2254 | ||
2255 | assert(s); | |
2256 | ||
2257 | return !s->got_socket_fd; | |
2258 | } | |
2259 | ||
2260 | static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { | |
2261 | Service *s = SERVICE(u); | |
2262 | bool success; | |
2263 | ||
2264 | assert(s); | |
2265 | assert(pid >= 0); | |
2266 | ||
2267 | if (s->sysv_path) | |
2268 | success = is_clean_exit_lsb(code, status); | |
2269 | else | |
2270 | success = is_clean_exit(code, status); | |
2271 | ||
2272 | if (s->main_pid == pid) { | |
2273 | ||
2274 | s->main_pid = 0; | |
2275 | exec_status_exit(&s->main_exec_status, pid, code, status); | |
2276 | ||
2277 | if (s->type != SERVICE_FORKING && s->control_command) { | |
2278 | s->control_command->exec_status = s->main_exec_status; | |
2279 | ||
2280 | if (s->control_command->ignore) | |
2281 | success = true; | |
2282 | } | |
2283 | ||
2284 | log_full(success ? LOG_DEBUG : LOG_NOTICE, | |
2285 | "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status); | |
2286 | s->failure = s->failure || !success; | |
2287 | ||
2288 | if (s->control_command && | |
2289 | s->control_command->command_next && | |
2290 | success) { | |
2291 | ||
2292 | /* There is another command to * | |
2293 | * execute, so let's do that. */ | |
2294 | ||
2295 | log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state)); | |
2296 | service_run_next_main(s, success); | |
2297 | ||
2298 | } else { | |
2299 | ||
2300 | /* The service exited, so the service is officially | |
2301 | * gone. */ | |
2302 | ||
2303 | s->control_command = NULL; | |
2304 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
2305 | ||
2306 | switch (s->state) { | |
2307 | ||
2308 | case SERVICE_START_POST: | |
2309 | case SERVICE_RELOAD: | |
2310 | case SERVICE_STOP: | |
2311 | /* Need to wait until the operation is | |
2312 | * done */ | |
2313 | break; | |
2314 | ||
2315 | case SERVICE_START: | |
2316 | if (s->type == SERVICE_ONESHOT) { | |
2317 | /* This was our main goal, so let's go on */ | |
2318 | if (success) | |
2319 | service_enter_start_post(s); | |
2320 | else | |
2321 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
2322 | break; | |
2323 | } else { | |
2324 | assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY); | |
2325 | ||
2326 | /* Fall through */ | |
2327 | } | |
2328 | ||
2329 | case SERVICE_RUNNING: | |
2330 | service_enter_running(s, success); | |
2331 | break; | |
2332 | ||
2333 | case SERVICE_STOP_SIGTERM: | |
2334 | case SERVICE_STOP_SIGKILL: | |
2335 | ||
2336 | if (!control_pid_good(s)) | |
2337 | service_enter_stop_post(s, success); | |
2338 | ||
2339 | /* If there is still a control process, wait for that first */ | |
2340 | break; | |
2341 | ||
2342 | default: | |
2343 | assert_not_reached("Uh, main process died at wrong time."); | |
2344 | } | |
2345 | } | |
2346 | ||
2347 | } else if (s->control_pid == pid) { | |
2348 | ||
2349 | s->control_pid = 0; | |
2350 | ||
2351 | if (s->control_command) { | |
2352 | exec_status_exit(&s->control_command->exec_status, pid, code, status); | |
2353 | ||
2354 | if (s->control_command->ignore) | |
2355 | success = true; | |
2356 | } | |
2357 | ||
2358 | log_full(success ? LOG_DEBUG : LOG_NOTICE, | |
2359 | "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status); | |
2360 | s->failure = s->failure || !success; | |
2361 | ||
2362 | if (s->control_command && | |
2363 | s->control_command->command_next && | |
2364 | success) { | |
2365 | ||
2366 | /* There is another command to * | |
2367 | * execute, so let's do that. */ | |
2368 | ||
2369 | log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state)); | |
2370 | service_run_next_control(s, success); | |
2371 | ||
2372 | } else { | |
2373 | /* No further commands for this step, so let's | |
2374 | * figure out what to do next */ | |
2375 | ||
2376 | s->control_command = NULL; | |
2377 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
2378 | ||
2379 | log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state)); | |
2380 | ||
2381 | switch (s->state) { | |
2382 | ||
2383 | case SERVICE_START_PRE: | |
2384 | if (success) | |
2385 | service_enter_start(s); | |
2386 | else | |
2387 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
2388 | break; | |
2389 | ||
2390 | case SERVICE_START: | |
2391 | assert(s->type == SERVICE_FORKING); | |
2392 | ||
2393 | /* Let's try to load the pid | |
2394 | * file here if we can. We | |
2395 | * ignore the return value, | |
2396 | * since the PID file might | |
2397 | * actually be created by a | |
2398 | * START_POST script */ | |
2399 | ||
2400 | if (success) { | |
2401 | if (s->pid_file) | |
2402 | service_load_pid_file(s); | |
2403 | ||
2404 | service_enter_start_post(s); | |
2405 | } else | |
2406 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
2407 | ||
2408 | break; | |
2409 | ||
2410 | case SERVICE_START_POST: | |
2411 | if (success && s->pid_file && !s->main_pid_known) { | |
2412 | int r; | |
2413 | ||
2414 | /* Hmm, let's see if we can | |
2415 | * load the pid now after the | |
2416 | * start-post scripts got | |
2417 | * executed. */ | |
2418 | ||
2419 | if ((r = service_load_pid_file(s)) < 0) | |
2420 | log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r)); | |
2421 | } | |
2422 | ||
2423 | /* Fall through */ | |
2424 | ||
2425 | case SERVICE_RELOAD: | |
2426 | if (success) | |
2427 | service_enter_running(s, true); | |
2428 | else | |
2429 | service_enter_stop(s, false); | |
2430 | ||
2431 | break; | |
2432 | ||
2433 | case SERVICE_STOP: | |
2434 | service_enter_signal(s, SERVICE_STOP_SIGTERM, success); | |
2435 | break; | |
2436 | ||
2437 | case SERVICE_STOP_SIGTERM: | |
2438 | case SERVICE_STOP_SIGKILL: | |
2439 | if (main_pid_good(s) <= 0) | |
2440 | service_enter_stop_post(s, success); | |
2441 | ||
2442 | /* If there is still a service | |
2443 | * process around, wait until | |
2444 | * that one quit, too */ | |
2445 | break; | |
2446 | ||
2447 | case SERVICE_STOP_POST: | |
2448 | case SERVICE_FINAL_SIGTERM: | |
2449 | case SERVICE_FINAL_SIGKILL: | |
2450 | service_enter_dead(s, success, true); | |
2451 | break; | |
2452 | ||
2453 | default: | |
2454 | assert_not_reached("Uh, control process died at wrong time."); | |
2455 | } | |
2456 | } | |
2457 | } | |
2458 | ||
2459 | /* Notify clients about changed exit status */ | |
2460 | unit_add_to_dbus_queue(u); | |
2461 | } | |
2462 | ||
2463 | static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) { | |
2464 | Service *s = SERVICE(u); | |
2465 | ||
2466 | assert(s); | |
2467 | assert(elapsed == 1); | |
2468 | ||
2469 | assert(w == &s->timer_watch); | |
2470 | ||
2471 | switch (s->state) { | |
2472 | ||
2473 | case SERVICE_START_PRE: | |
2474 | case SERVICE_START: | |
2475 | log_warning("%s operation timed out. Terminating.", u->meta.id); | |
2476 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
2477 | break; | |
2478 | ||
2479 | case SERVICE_START_POST: | |
2480 | case SERVICE_RELOAD: | |
2481 | log_warning("%s operation timed out. Stopping.", u->meta.id); | |
2482 | service_enter_stop(s, false); | |
2483 | break; | |
2484 | ||
2485 | case SERVICE_STOP: | |
2486 | log_warning("%s stopping timed out. Terminating.", u->meta.id); | |
2487 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); | |
2488 | break; | |
2489 | ||
2490 | case SERVICE_STOP_SIGTERM: | |
2491 | log_warning("%s stopping timed out. Killing.", u->meta.id); | |
2492 | service_enter_signal(s, SERVICE_STOP_SIGKILL, false); | |
2493 | break; | |
2494 | ||
2495 | case SERVICE_STOP_SIGKILL: | |
2496 | /* Uh, wie sent a SIGKILL and it is still not gone? | |
2497 | * Must be something we cannot kill, so let's just be | |
2498 | * weirded out and continue */ | |
2499 | ||
2500 | log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id); | |
2501 | service_enter_stop_post(s, false); | |
2502 | break; | |
2503 | ||
2504 | case SERVICE_STOP_POST: | |
2505 | log_warning("%s stopping timed out (2). Terminating.", u->meta.id); | |
2506 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); | |
2507 | break; | |
2508 | ||
2509 | case SERVICE_FINAL_SIGTERM: | |
2510 | log_warning("%s stopping timed out (2). Killing.", u->meta.id); | |
2511 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, false); | |
2512 | break; | |
2513 | ||
2514 | case SERVICE_FINAL_SIGKILL: | |
2515 | log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id); | |
2516 | service_enter_dead(s, false, true); | |
2517 | break; | |
2518 | ||
2519 | case SERVICE_AUTO_RESTART: | |
2520 | log_info("%s holdoff time over, scheduling restart.", u->meta.id); | |
2521 | service_enter_restart(s); | |
2522 | break; | |
2523 | ||
2524 | default: | |
2525 | assert_not_reached("Timeout at wrong time."); | |
2526 | } | |
2527 | } | |
2528 | ||
2529 | static void service_cgroup_notify_event(Unit *u) { | |
2530 | Service *s = SERVICE(u); | |
2531 | ||
2532 | assert(u); | |
2533 | ||
2534 | log_debug("%s: cgroup is empty", u->meta.id); | |
2535 | ||
2536 | switch (s->state) { | |
2537 | ||
2538 | /* Waiting for SIGCHLD is usually more interesting, | |
2539 | * because it includes return codes/signals. Which is | |
2540 | * why we ignore the cgroup events for most cases, | |
2541 | * except when we don't know pid which to expect the | |
2542 | * SIGCHLD for. */ | |
2543 | ||
2544 | case SERVICE_RUNNING: | |
2545 | service_enter_running(s, true); | |
2546 | break; | |
2547 | ||
2548 | default: | |
2549 | ; | |
2550 | } | |
2551 | } | |
2552 | ||
2553 | static void service_notify_message(Unit *u, pid_t pid, char **tags) { | |
2554 | Service *s = SERVICE(u); | |
2555 | const char *e; | |
2556 | ||
2557 | assert(u); | |
2558 | ||
2559 | if (s->notify_access == NOTIFY_NONE) { | |
2560 | log_warning("%s: Got notification message from PID %lu, but reception is disabled.", | |
2561 | u->meta.id, (unsigned long) pid); | |
2562 | return; | |
2563 | } | |
2564 | ||
2565 | if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) { | |
2566 | log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu", | |
2567 | u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid); | |
2568 | return; | |
2569 | } | |
2570 | ||
2571 | log_debug("%s: Got message", u->meta.id); | |
2572 | ||
2573 | /* Interpret MAINPID= */ | |
2574 | if ((e = strv_find_prefix(tags, "MAINPID=")) && | |
2575 | (s->state == SERVICE_START || | |
2576 | s->state == SERVICE_START_POST || | |
2577 | s->state == SERVICE_RUNNING || | |
2578 | s->state == SERVICE_RELOAD)) { | |
2579 | ||
2580 | if (parse_pid(e + 8, &pid) < 0) | |
2581 | log_warning("Failed to parse notification message %s", e); | |
2582 | else { | |
2583 | log_debug("%s: got %s", u->meta.id, e); | |
2584 | service_set_main_pid(s, pid); | |
2585 | } | |
2586 | } | |
2587 | ||
2588 | /* Interpret READY= */ | |
2589 | if (s->type == SERVICE_NOTIFY && | |
2590 | s->state == SERVICE_START && | |
2591 | strv_find(tags, "READY=1")) { | |
2592 | log_debug("%s: got READY=1", u->meta.id); | |
2593 | ||
2594 | service_enter_start_post(s); | |
2595 | } | |
2596 | ||
2597 | /* Interpret STATUS= */ | |
2598 | if ((e = strv_find_prefix(tags, "STATUS="))) { | |
2599 | char *t; | |
2600 | ||
2601 | if (e[7]) { | |
2602 | if (!(t = strdup(e+7))) { | |
2603 | log_error("Failed to allocate string."); | |
2604 | return; | |
2605 | } | |
2606 | ||
2607 | log_debug("%s: got %s", u->meta.id, e); | |
2608 | ||
2609 | free(s->status_text); | |
2610 | s->status_text = t; | |
2611 | } else { | |
2612 | free(s->status_text); | |
2613 | s->status_text = NULL; | |
2614 | } | |
2615 | ||
2616 | } | |
2617 | ||
2618 | /* Notify clients about changed status or main pid */ | |
2619 | unit_add_to_dbus_queue(u); | |
2620 | } | |
2621 | ||
2622 | static int service_enumerate(Manager *m) { | |
2623 | char **p; | |
2624 | unsigned i; | |
2625 | DIR *d = NULL; | |
2626 | char *path = NULL, *fpath = NULL, *name = NULL; | |
2627 | int r; | |
2628 | ||
2629 | assert(m); | |
2630 | ||
2631 | STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path) | |
2632 | for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) { | |
2633 | struct dirent *de; | |
2634 | ||
2635 | free(path); | |
2636 | path = NULL; | |
2637 | if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) { | |
2638 | r = -ENOMEM; | |
2639 | goto finish; | |
2640 | } | |
2641 | ||
2642 | if (d) | |
2643 | closedir(d); | |
2644 | ||
2645 | if (!(d = opendir(path))) { | |
2646 | if (errno != ENOENT) | |
2647 | log_warning("opendir() failed on %s: %s", path, strerror(errno)); | |
2648 | ||
2649 | continue; | |
2650 | } | |
2651 | ||
2652 | while ((de = readdir(d))) { | |
2653 | Unit *service; | |
2654 | int a, b; | |
2655 | ||
2656 | if (ignore_file(de->d_name)) | |
2657 | continue; | |
2658 | ||
2659 | if (de->d_name[0] != 'S' && de->d_name[0] != 'K') | |
2660 | continue; | |
2661 | ||
2662 | if (strlen(de->d_name) < 4) | |
2663 | continue; | |
2664 | ||
2665 | a = undecchar(de->d_name[1]); | |
2666 | b = undecchar(de->d_name[2]); | |
2667 | ||
2668 | if (a < 0 || b < 0) | |
2669 | continue; | |
2670 | ||
2671 | free(fpath); | |
2672 | fpath = NULL; | |
2673 | if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) { | |
2674 | r = -ENOMEM; | |
2675 | goto finish; | |
2676 | } | |
2677 | ||
2678 | if (access(fpath, X_OK) < 0) { | |
2679 | ||
2680 | if (errno != ENOENT) | |
2681 | log_warning("access() failed on %s: %s", fpath, strerror(errno)); | |
2682 | ||
2683 | continue; | |
2684 | } | |
2685 | ||
2686 | free(name); | |
2687 | if (!(name = sysv_translate_name(de->d_name + 3))) { | |
2688 | r = -ENOMEM; | |
2689 | goto finish; | |
2690 | } | |
2691 | ||
2692 | if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) { | |
2693 | log_warning("Failed to prepare unit %s: %s", name, strerror(-r)); | |
2694 | continue; | |
2695 | } | |
2696 | ||
2697 | if (de->d_name[0] == 'S' && | |
2698 | (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT)) { | |
2699 | SERVICE(service)->sysv_start_priority = | |
2700 | MAX(a*10 + b, SERVICE(service)->sysv_start_priority); | |
2701 | SERVICE(service)->sysv_enabled = true; | |
2702 | } | |
2703 | ||
2704 | manager_dispatch_load_queue(m); | |
2705 | service = unit_follow_merge(service); | |
2706 | ||
2707 | /* If this is a native service, rely | |
2708 | * on native ways to pull in a | |
2709 | * service, don't pull it in via sysv | |
2710 | * rcN.d links. */ | |
2711 | if (service->meta.fragment_path) | |
2712 | continue; | |
2713 | ||
2714 | if (de->d_name[0] == 'S') { | |
2715 | ||
2716 | if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0) | |
2717 | goto finish; | |
2718 | ||
2719 | } else if (de->d_name[0] == 'K' && | |
2720 | (rcnd_table[i].type == RUNLEVEL_DOWN || | |
2721 | rcnd_table[i].type == RUNLEVEL_SYSINIT)) { | |
2722 | ||
2723 | /* We honour K links only for | |
2724 | * halt/reboot. For the normal | |
2725 | * runlevels we assume the | |
2726 | * stop jobs will be | |
2727 | * implicitly added by the | |
2728 | * core logic. Also, we don't | |
2729 | * really distuingish here | |
2730 | * between the runlevels 0 and | |
2731 | * 6 and just add them to the | |
2732 | * special shutdown target. On | |
2733 | * SUSE the boot.d/ runlevel | |
2734 | * is also used for shutdown, | |
2735 | * so we add links for that | |
2736 | * too to the shutdown | |
2737 | * target.*/ | |
2738 | ||
2739 | if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0) | |
2740 | goto finish; | |
2741 | } | |
2742 | } | |
2743 | } | |
2744 | ||
2745 | r = 0; | |
2746 | ||
2747 | finish: | |
2748 | free(path); | |
2749 | free(fpath); | |
2750 | free(name); | |
2751 | ||
2752 | if (d) | |
2753 | closedir(d); | |
2754 | ||
2755 | return r; | |
2756 | } | |
2757 | ||
2758 | static void service_bus_name_owner_change( | |
2759 | Unit *u, | |
2760 | const char *name, | |
2761 | const char *old_owner, | |
2762 | const char *new_owner) { | |
2763 | ||
2764 | Service *s = SERVICE(u); | |
2765 | ||
2766 | assert(s); | |
2767 | assert(name); | |
2768 | ||
2769 | assert(streq(s->bus_name, name)); | |
2770 | assert(old_owner || new_owner); | |
2771 | ||
2772 | if (old_owner && new_owner) | |
2773 | log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner); | |
2774 | else if (old_owner) | |
2775 | log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner); | |
2776 | else | |
2777 | log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner); | |
2778 | ||
2779 | s->bus_name_good = !!new_owner; | |
2780 | ||
2781 | if (s->type == SERVICE_DBUS) { | |
2782 | ||
2783 | /* service_enter_running() will figure out what to | |
2784 | * do */ | |
2785 | if (s->state == SERVICE_RUNNING) | |
2786 | service_enter_running(s, true); | |
2787 | else if (s->state == SERVICE_START && new_owner) | |
2788 | service_enter_start_post(s); | |
2789 | ||
2790 | } else if (new_owner && | |
2791 | s->main_pid <= 0 && | |
2792 | (s->state == SERVICE_START || | |
2793 | s->state == SERVICE_START_POST || | |
2794 | s->state == SERVICE_RUNNING || | |
2795 | s->state == SERVICE_RELOAD)) { | |
2796 | ||
2797 | /* Try to acquire PID from bus service */ | |
2798 | log_debug("Trying to acquire PID from D-Bus name..."); | |
2799 | ||
2800 | bus_query_pid(u->meta.manager, name); | |
2801 | } | |
2802 | } | |
2803 | ||
2804 | static void service_bus_query_pid_done( | |
2805 | Unit *u, | |
2806 | const char *name, | |
2807 | pid_t pid) { | |
2808 | ||
2809 | Service *s = SERVICE(u); | |
2810 | ||
2811 | assert(s); | |
2812 | assert(name); | |
2813 | ||
2814 | log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid); | |
2815 | ||
2816 | if (s->main_pid <= 0 && | |
2817 | (s->state == SERVICE_START || | |
2818 | s->state == SERVICE_START_POST || | |
2819 | s->state == SERVICE_RUNNING || | |
2820 | s->state == SERVICE_RELOAD)) | |
2821 | service_set_main_pid(s, pid); | |
2822 | } | |
2823 | ||
2824 | int service_set_socket_fd(Service *s, int fd, Socket *sock) { | |
2825 | assert(s); | |
2826 | assert(fd >= 0); | |
2827 | ||
2828 | /* This is called by the socket code when instantiating a new | |
2829 | * service for a stream socket and the socket needs to be | |
2830 | * configured. */ | |
2831 | ||
2832 | if (s->meta.load_state != UNIT_LOADED) | |
2833 | return -EINVAL; | |
2834 | ||
2835 | if (s->socket_fd >= 0) | |
2836 | return -EBUSY; | |
2837 | ||
2838 | if (s->state != SERVICE_DEAD) | |
2839 | return -EAGAIN; | |
2840 | ||
2841 | s->socket_fd = fd; | |
2842 | s->got_socket_fd = true; | |
2843 | s->socket = sock; | |
2844 | ||
2845 | return 0; | |
2846 | } | |
2847 | ||
2848 | static void service_reset_maintenance(Unit *u) { | |
2849 | Service *s = SERVICE(u); | |
2850 | ||
2851 | assert(s); | |
2852 | ||
2853 | if (s->state == SERVICE_MAINTENANCE) | |
2854 | service_set_state(s, SERVICE_DEAD); | |
2855 | ||
2856 | s->failure = false; | |
2857 | } | |
2858 | ||
2859 | static const char* const service_state_table[_SERVICE_STATE_MAX] = { | |
2860 | [SERVICE_DEAD] = "dead", | |
2861 | [SERVICE_START_PRE] = "start-pre", | |
2862 | [SERVICE_START] = "start", | |
2863 | [SERVICE_START_POST] = "start-post", | |
2864 | [SERVICE_RUNNING] = "running", | |
2865 | [SERVICE_EXITED] = "exited", | |
2866 | [SERVICE_RELOAD] = "reload", | |
2867 | [SERVICE_STOP] = "stop", | |
2868 | [SERVICE_STOP_SIGTERM] = "stop-sigterm", | |
2869 | [SERVICE_STOP_SIGKILL] = "stop-sigkill", | |
2870 | [SERVICE_STOP_POST] = "stop-post", | |
2871 | [SERVICE_FINAL_SIGTERM] = "final-sigterm", | |
2872 | [SERVICE_FINAL_SIGKILL] = "final-sigkill", | |
2873 | [SERVICE_MAINTENANCE] = "maintenance", | |
2874 | [SERVICE_AUTO_RESTART] = "auto-restart", | |
2875 | }; | |
2876 | ||
2877 | DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState); | |
2878 | ||
2879 | static const char* const service_restart_table[_SERVICE_RESTART_MAX] = { | |
2880 | [SERVICE_ONCE] = "once", | |
2881 | [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success", | |
2882 | [SERVICE_RESTART_ALWAYS] = "restart-always", | |
2883 | }; | |
2884 | ||
2885 | DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart); | |
2886 | ||
2887 | static const char* const service_type_table[_SERVICE_TYPE_MAX] = { | |
2888 | [SERVICE_SIMPLE] = "simple", | |
2889 | [SERVICE_FORKING] = "forking", | |
2890 | [SERVICE_ONESHOT] = "oneshot", | |
2891 | [SERVICE_DBUS] = "dbus", | |
2892 | [SERVICE_NOTIFY] = "notify" | |
2893 | }; | |
2894 | ||
2895 | DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType); | |
2896 | ||
2897 | static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = { | |
2898 | [SERVICE_EXEC_START_PRE] = "ExecStartPre", | |
2899 | [SERVICE_EXEC_START] = "ExecStart", | |
2900 | [SERVICE_EXEC_START_POST] = "ExecStartPost", | |
2901 | [SERVICE_EXEC_RELOAD] = "ExecReload", | |
2902 | [SERVICE_EXEC_STOP] = "ExecStop", | |
2903 | [SERVICE_EXEC_STOP_POST] = "ExecStopPost", | |
2904 | }; | |
2905 | ||
2906 | DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand); | |
2907 | ||
2908 | static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = { | |
2909 | [NOTIFY_NONE] = "none", | |
2910 | [NOTIFY_MAIN] = "main", | |
2911 | [NOTIFY_ALL] = "all" | |
2912 | }; | |
2913 | ||
2914 | DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess); | |
2915 | ||
2916 | const UnitVTable service_vtable = { | |
2917 | .suffix = ".service", | |
2918 | .show_status = true, | |
2919 | ||
2920 | .init = service_init, | |
2921 | .done = service_done, | |
2922 | .load = service_load, | |
2923 | ||
2924 | .coldplug = service_coldplug, | |
2925 | ||
2926 | .dump = service_dump, | |
2927 | ||
2928 | .start = service_start, | |
2929 | .stop = service_stop, | |
2930 | .reload = service_reload, | |
2931 | ||
2932 | .can_reload = service_can_reload, | |
2933 | ||
2934 | .serialize = service_serialize, | |
2935 | .deserialize_item = service_deserialize_item, | |
2936 | ||
2937 | .active_state = service_active_state, | |
2938 | .sub_state_to_string = service_sub_state_to_string, | |
2939 | ||
2940 | .check_gc = service_check_gc, | |
2941 | .check_snapshot = service_check_snapshot, | |
2942 | ||
2943 | .sigchld_event = service_sigchld_event, | |
2944 | .timer_event = service_timer_event, | |
2945 | ||
2946 | .reset_maintenance = service_reset_maintenance, | |
2947 | ||
2948 | .cgroup_notify_empty = service_cgroup_notify_event, | |
2949 | .notify_message = service_notify_message, | |
2950 | ||
2951 | .bus_name_owner_change = service_bus_name_owner_change, | |
2952 | .bus_query_pid_done = service_bus_query_pid_done, | |
2953 | ||
2954 | .bus_interface = "org.freedesktop.systemd1.Service", | |
2955 | .bus_message_handler = bus_service_message_handler, | |
2956 | .bus_invalidating_properties = bus_service_invalidating_properties, | |
2957 | ||
2958 | .enumerate = service_enumerate | |
2959 | }; |