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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 Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 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 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser 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 <unistd.h> | |
25 | ||
26 | #include "async.h" | |
27 | #include "bus-error.h" | |
28 | #include "bus-kernel.h" | |
29 | #include "bus-util.h" | |
30 | #include "dbus-service.h" | |
31 | #include "def.h" | |
32 | #include "env-util.h" | |
33 | #include "escape.h" | |
34 | #include "exit-status.h" | |
35 | #include "fileio.h" | |
36 | #include "formats-util.h" | |
37 | #include "load-dropin.h" | |
38 | #include "load-fragment.h" | |
39 | #include "log.h" | |
40 | #include "manager.h" | |
41 | #include "path-util.h" | |
42 | #include "process-util.h" | |
43 | #include "signal-util.h" | |
44 | #include "special.h" | |
45 | #include "string-util.h" | |
46 | #include "strv.h" | |
47 | #include "unit-name.h" | |
48 | #include "unit-printf.h" | |
49 | #include "unit.h" | |
50 | #include "utf8.h" | |
51 | #include "util.h" | |
52 | #include "service.h" | |
53 | ||
54 | static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = { | |
55 | [SERVICE_DEAD] = UNIT_INACTIVE, | |
56 | [SERVICE_START_PRE] = UNIT_ACTIVATING, | |
57 | [SERVICE_START] = UNIT_ACTIVATING, | |
58 | [SERVICE_START_POST] = UNIT_ACTIVATING, | |
59 | [SERVICE_RUNNING] = UNIT_ACTIVE, | |
60 | [SERVICE_EXITED] = UNIT_ACTIVE, | |
61 | [SERVICE_RELOAD] = UNIT_RELOADING, | |
62 | [SERVICE_STOP] = UNIT_DEACTIVATING, | |
63 | [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING, | |
64 | [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING, | |
65 | [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
66 | [SERVICE_STOP_POST] = UNIT_DEACTIVATING, | |
67 | [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING, | |
68 | [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
69 | [SERVICE_FAILED] = UNIT_FAILED, | |
70 | [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING | |
71 | }; | |
72 | ||
73 | /* For Type=idle we never want to delay any other jobs, hence we | |
74 | * consider idle jobs active as soon as we start working on them */ | |
75 | static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = { | |
76 | [SERVICE_DEAD] = UNIT_INACTIVE, | |
77 | [SERVICE_START_PRE] = UNIT_ACTIVE, | |
78 | [SERVICE_START] = UNIT_ACTIVE, | |
79 | [SERVICE_START_POST] = UNIT_ACTIVE, | |
80 | [SERVICE_RUNNING] = UNIT_ACTIVE, | |
81 | [SERVICE_EXITED] = UNIT_ACTIVE, | |
82 | [SERVICE_RELOAD] = UNIT_RELOADING, | |
83 | [SERVICE_STOP] = UNIT_DEACTIVATING, | |
84 | [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING, | |
85 | [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING, | |
86 | [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
87 | [SERVICE_STOP_POST] = UNIT_DEACTIVATING, | |
88 | [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING, | |
89 | [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
90 | [SERVICE_FAILED] = UNIT_FAILED, | |
91 | [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING | |
92 | }; | |
93 | ||
94 | static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata); | |
95 | static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); | |
96 | static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata); | |
97 | ||
98 | static void service_enter_signal(Service *s, ServiceState state, ServiceResult f); | |
99 | static void service_enter_reload_by_notify(Service *s); | |
100 | ||
101 | static void service_init(Unit *u) { | |
102 | Service *s = SERVICE(u); | |
103 | ||
104 | assert(u); | |
105 | assert(u->load_state == UNIT_STUB); | |
106 | ||
107 | s->timeout_start_usec = u->manager->default_timeout_start_usec; | |
108 | s->timeout_stop_usec = u->manager->default_timeout_stop_usec; | |
109 | s->restart_usec = u->manager->default_restart_usec; | |
110 | s->type = _SERVICE_TYPE_INVALID; | |
111 | s->socket_fd = -1; | |
112 | s->bus_endpoint_fd = -1; | |
113 | s->stdin_fd = s->stdout_fd = s->stderr_fd = -1; | |
114 | s->guess_main_pid = true; | |
115 | ||
116 | RATELIMIT_INIT(s->start_limit, u->manager->default_start_limit_interval, u->manager->default_start_limit_burst); | |
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 void service_unwatch_pid_file(Service *s) { | |
142 | if (!s->pid_file_pathspec) | |
143 | return; | |
144 | ||
145 | log_unit_debug(UNIT(s), "Stopping watch for PID file %s", s->pid_file_pathspec->path); | |
146 | path_spec_unwatch(s->pid_file_pathspec); | |
147 | path_spec_done(s->pid_file_pathspec); | |
148 | s->pid_file_pathspec = mfree(s->pid_file_pathspec); | |
149 | } | |
150 | ||
151 | static int service_set_main_pid(Service *s, pid_t pid) { | |
152 | pid_t ppid; | |
153 | ||
154 | assert(s); | |
155 | ||
156 | if (pid <= 1) | |
157 | return -EINVAL; | |
158 | ||
159 | if (pid == getpid()) | |
160 | return -EINVAL; | |
161 | ||
162 | if (s->main_pid == pid && s->main_pid_known) | |
163 | return 0; | |
164 | ||
165 | if (s->main_pid != pid) { | |
166 | service_unwatch_main_pid(s); | |
167 | exec_status_start(&s->main_exec_status, pid); | |
168 | } | |
169 | ||
170 | s->main_pid = pid; | |
171 | s->main_pid_known = true; | |
172 | ||
173 | if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) { | |
174 | log_unit_warning(UNIT(s), "Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", pid); | |
175 | s->main_pid_alien = true; | |
176 | } else | |
177 | s->main_pid_alien = false; | |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
182 | static void service_close_socket_fd(Service *s) { | |
183 | assert(s); | |
184 | ||
185 | s->socket_fd = asynchronous_close(s->socket_fd); | |
186 | } | |
187 | ||
188 | static void service_connection_unref(Service *s) { | |
189 | assert(s); | |
190 | ||
191 | if (!UNIT_ISSET(s->accept_socket)) | |
192 | return; | |
193 | ||
194 | socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket))); | |
195 | unit_ref_unset(&s->accept_socket); | |
196 | } | |
197 | ||
198 | static void service_stop_watchdog(Service *s) { | |
199 | assert(s); | |
200 | ||
201 | s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source); | |
202 | s->watchdog_timestamp = DUAL_TIMESTAMP_NULL; | |
203 | } | |
204 | ||
205 | static void service_start_watchdog(Service *s) { | |
206 | int r; | |
207 | ||
208 | assert(s); | |
209 | ||
210 | if (s->watchdog_usec <= 0) | |
211 | return; | |
212 | ||
213 | if (s->watchdog_event_source) { | |
214 | r = sd_event_source_set_time(s->watchdog_event_source, s->watchdog_timestamp.monotonic + s->watchdog_usec); | |
215 | if (r < 0) { | |
216 | log_unit_warning_errno(UNIT(s), r, "Failed to reset watchdog timer: %m"); | |
217 | return; | |
218 | } | |
219 | ||
220 | r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT); | |
221 | } else { | |
222 | r = sd_event_add_time( | |
223 | UNIT(s)->manager->event, | |
224 | &s->watchdog_event_source, | |
225 | CLOCK_MONOTONIC, | |
226 | s->watchdog_timestamp.monotonic + s->watchdog_usec, 0, | |
227 | service_dispatch_watchdog, s); | |
228 | if (r < 0) { | |
229 | log_unit_warning_errno(UNIT(s), r, "Failed to add watchdog timer: %m"); | |
230 | return; | |
231 | } | |
232 | ||
233 | (void) sd_event_source_set_description(s->watchdog_event_source, "service-watchdog"); | |
234 | ||
235 | /* Let's process everything else which might be a sign | |
236 | * of living before we consider a service died. */ | |
237 | r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE); | |
238 | } | |
239 | ||
240 | if (r < 0) | |
241 | log_unit_warning_errno(UNIT(s), r, "Failed to install watchdog timer: %m"); | |
242 | } | |
243 | ||
244 | static void service_reset_watchdog(Service *s) { | |
245 | assert(s); | |
246 | ||
247 | dual_timestamp_get(&s->watchdog_timestamp); | |
248 | service_start_watchdog(s); | |
249 | } | |
250 | ||
251 | static void service_fd_store_unlink(ServiceFDStore *fs) { | |
252 | ||
253 | if (!fs) | |
254 | return; | |
255 | ||
256 | if (fs->service) { | |
257 | assert(fs->service->n_fd_store > 0); | |
258 | LIST_REMOVE(fd_store, fs->service->fd_store, fs); | |
259 | fs->service->n_fd_store--; | |
260 | } | |
261 | ||
262 | if (fs->event_source) { | |
263 | sd_event_source_set_enabled(fs->event_source, SD_EVENT_OFF); | |
264 | sd_event_source_unref(fs->event_source); | |
265 | } | |
266 | ||
267 | free(fs->fdname); | |
268 | safe_close(fs->fd); | |
269 | free(fs); | |
270 | } | |
271 | ||
272 | static void service_release_resources(Unit *u) { | |
273 | Service *s = SERVICE(u); | |
274 | ||
275 | assert(s); | |
276 | ||
277 | if (!s->fd_store && s->stdin_fd < 0 && s->stdout_fd < 0 && s->stderr_fd < 0) | |
278 | return; | |
279 | ||
280 | log_unit_debug(u, "Releasing all resources."); | |
281 | ||
282 | s->stdin_fd = safe_close(s->stdin_fd); | |
283 | s->stdout_fd = safe_close(s->stdout_fd); | |
284 | s->stderr_fd = safe_close(s->stderr_fd); | |
285 | ||
286 | while (s->fd_store) | |
287 | service_fd_store_unlink(s->fd_store); | |
288 | ||
289 | assert(s->n_fd_store == 0); | |
290 | } | |
291 | ||
292 | static void service_done(Unit *u) { | |
293 | Service *s = SERVICE(u); | |
294 | ||
295 | assert(s); | |
296 | ||
297 | s->pid_file = mfree(s->pid_file); | |
298 | s->status_text = mfree(s->status_text); | |
299 | s->reboot_arg = mfree(s->reboot_arg); | |
300 | ||
301 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); | |
302 | exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX); | |
303 | s->control_command = NULL; | |
304 | s->main_command = NULL; | |
305 | ||
306 | exit_status_set_free(&s->restart_prevent_status); | |
307 | exit_status_set_free(&s->restart_force_status); | |
308 | exit_status_set_free(&s->success_status); | |
309 | ||
310 | /* This will leak a process, but at least no memory or any of | |
311 | * our resources */ | |
312 | service_unwatch_main_pid(s); | |
313 | service_unwatch_control_pid(s); | |
314 | service_unwatch_pid_file(s); | |
315 | ||
316 | if (s->bus_name) { | |
317 | unit_unwatch_bus_name(u, s->bus_name); | |
318 | s->bus_name = mfree(s->bus_name); | |
319 | } | |
320 | ||
321 | s->bus_endpoint_fd = safe_close(s->bus_endpoint_fd); | |
322 | service_close_socket_fd(s); | |
323 | service_connection_unref(s); | |
324 | ||
325 | unit_ref_unset(&s->accept_socket); | |
326 | ||
327 | service_stop_watchdog(s); | |
328 | ||
329 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
330 | ||
331 | service_release_resources(u); | |
332 | } | |
333 | ||
334 | static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) { | |
335 | ServiceFDStore *fs = userdata; | |
336 | ||
337 | assert(e); | |
338 | assert(fs); | |
339 | ||
340 | /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */ | |
341 | service_fd_store_unlink(fs); | |
342 | return 0; | |
343 | } | |
344 | ||
345 | static int service_add_fd_store(Service *s, int fd, const char *name) { | |
346 | ServiceFDStore *fs; | |
347 | int r; | |
348 | ||
349 | assert(s); | |
350 | assert(fd >= 0); | |
351 | ||
352 | if (s->n_fd_store >= s->n_fd_store_max) | |
353 | return 0; | |
354 | ||
355 | LIST_FOREACH(fd_store, fs, s->fd_store) { | |
356 | r = same_fd(fs->fd, fd); | |
357 | if (r < 0) | |
358 | return r; | |
359 | if (r > 0) { | |
360 | /* Already included */ | |
361 | safe_close(fd); | |
362 | return 1; | |
363 | } | |
364 | } | |
365 | ||
366 | fs = new0(ServiceFDStore, 1); | |
367 | if (!fs) | |
368 | return -ENOMEM; | |
369 | ||
370 | fs->fd = fd; | |
371 | fs->service = s; | |
372 | fs->fdname = strdup(name ?: "stored"); | |
373 | if (!fs->fdname) { | |
374 | free(fs); | |
375 | return -ENOMEM; | |
376 | } | |
377 | ||
378 | r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs); | |
379 | if (r < 0) { | |
380 | free(fs->fdname); | |
381 | free(fs); | |
382 | return r; | |
383 | } | |
384 | ||
385 | (void) sd_event_source_set_description(fs->event_source, "service-fd-store"); | |
386 | ||
387 | LIST_PREPEND(fd_store, s->fd_store, fs); | |
388 | s->n_fd_store++; | |
389 | ||
390 | return 1; | |
391 | } | |
392 | ||
393 | static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) { | |
394 | int r; | |
395 | ||
396 | assert(s); | |
397 | ||
398 | if (fdset_size(fds) <= 0) | |
399 | return 0; | |
400 | ||
401 | while (s->n_fd_store < s->n_fd_store_max) { | |
402 | _cleanup_close_ int fd = -1; | |
403 | ||
404 | fd = fdset_steal_first(fds); | |
405 | if (fd < 0) | |
406 | break; | |
407 | ||
408 | r = service_add_fd_store(s, fd, name); | |
409 | if (r < 0) | |
410 | return log_unit_error_errno(UNIT(s), r, "Couldn't add fd to fd store: %m"); | |
411 | if (r > 0) { | |
412 | log_unit_debug(UNIT(s), "Added fd to fd store."); | |
413 | fd = -1; | |
414 | } | |
415 | } | |
416 | ||
417 | if (fdset_size(fds) > 0) | |
418 | log_unit_warning(UNIT(s), "Tried to store more fds than FDStoreMax=%u allows, closing remaining.", s->n_fd_store_max); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | static int service_arm_timer(Service *s, usec_t usec) { | |
424 | int r; | |
425 | ||
426 | assert(s); | |
427 | ||
428 | if (s->timer_event_source) { | |
429 | r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + usec); | |
430 | if (r < 0) | |
431 | return r; | |
432 | ||
433 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
434 | } | |
435 | ||
436 | r = sd_event_add_time( | |
437 | UNIT(s)->manager->event, | |
438 | &s->timer_event_source, | |
439 | CLOCK_MONOTONIC, | |
440 | now(CLOCK_MONOTONIC) + usec, 0, | |
441 | service_dispatch_timer, s); | |
442 | if (r < 0) | |
443 | return r; | |
444 | ||
445 | (void) sd_event_source_set_description(s->timer_event_source, "service-timer"); | |
446 | ||
447 | return 0; | |
448 | } | |
449 | ||
450 | static int service_verify(Service *s) { | |
451 | assert(s); | |
452 | ||
453 | if (UNIT(s)->load_state != UNIT_LOADED) | |
454 | return 0; | |
455 | ||
456 | if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) { | |
457 | log_unit_error(UNIT(s), "Service lacks both ExecStart= and ExecStop= setting. Refusing."); | |
458 | return -EINVAL; | |
459 | } | |
460 | ||
461 | if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) { | |
462 | log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing."); | |
463 | return -EINVAL; | |
464 | } | |
465 | ||
466 | if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) { | |
467 | log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing."); | |
468 | return -EINVAL; | |
469 | } | |
470 | ||
471 | if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) { | |
472 | log_unit_error(UNIT(s), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing."); | |
473 | return -EINVAL; | |
474 | } | |
475 | ||
476 | if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) { | |
477 | log_unit_error(UNIT(s), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing."); | |
478 | return -EINVAL; | |
479 | } | |
480 | ||
481 | if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) { | |
482 | log_unit_error(UNIT(s), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing."); | |
483 | return -EINVAL; | |
484 | } | |
485 | ||
486 | if (s->type == SERVICE_DBUS && !s->bus_name) { | |
487 | log_unit_error(UNIT(s), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing."); | |
488 | return -EINVAL; | |
489 | } | |
490 | ||
491 | if (s->bus_name && s->type != SERVICE_DBUS) | |
492 | log_unit_warning(UNIT(s), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring."); | |
493 | ||
494 | if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) { | |
495 | log_unit_error(UNIT(s), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing."); | |
496 | return -EINVAL; | |
497 | } | |
498 | ||
499 | if (s->usb_function_descriptors && !s->usb_function_strings) | |
500 | log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring."); | |
501 | ||
502 | if (!s->usb_function_descriptors && s->usb_function_strings) | |
503 | log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring."); | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int service_add_default_dependencies(Service *s) { | |
509 | int r; | |
510 | ||
511 | assert(s); | |
512 | ||
513 | /* Add a number of automatic dependencies useful for the | |
514 | * majority of services. */ | |
515 | ||
516 | /* First, pull in base system */ | |
517 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true); | |
518 | if (r < 0) | |
519 | return r; | |
520 | ||
521 | /* Second, activate normal shutdown */ | |
522 | return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); | |
523 | } | |
524 | ||
525 | static void service_fix_output(Service *s) { | |
526 | assert(s); | |
527 | ||
528 | /* If nothing has been explicitly configured, patch default | |
529 | * output in. If input is socket/tty we avoid this however, | |
530 | * since in that case we want output to default to the same | |
531 | * place as we read input from. */ | |
532 | ||
533 | if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT && | |
534 | s->exec_context.std_output == EXEC_OUTPUT_INHERIT && | |
535 | s->exec_context.std_input == EXEC_INPUT_NULL) | |
536 | s->exec_context.std_error = UNIT(s)->manager->default_std_error; | |
537 | ||
538 | if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT && | |
539 | s->exec_context.std_input == EXEC_INPUT_NULL) | |
540 | s->exec_context.std_output = UNIT(s)->manager->default_std_output; | |
541 | } | |
542 | ||
543 | static int service_add_extras(Service *s) { | |
544 | int r; | |
545 | ||
546 | assert(s); | |
547 | ||
548 | if (s->type == _SERVICE_TYPE_INVALID) { | |
549 | /* Figure out a type automatically */ | |
550 | if (s->bus_name) | |
551 | s->type = SERVICE_DBUS; | |
552 | else if (s->exec_command[SERVICE_EXEC_START]) | |
553 | s->type = SERVICE_SIMPLE; | |
554 | else | |
555 | s->type = SERVICE_ONESHOT; | |
556 | } | |
557 | ||
558 | /* Oneshot services have disabled start timeout by default */ | |
559 | if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined) | |
560 | s->timeout_start_usec = 0; | |
561 | ||
562 | service_fix_output(s); | |
563 | ||
564 | r = unit_patch_contexts(UNIT(s)); | |
565 | if (r < 0) | |
566 | return r; | |
567 | ||
568 | r = unit_add_exec_dependencies(UNIT(s), &s->exec_context); | |
569 | if (r < 0) | |
570 | return r; | |
571 | ||
572 | r = unit_set_default_slice(UNIT(s)); | |
573 | if (r < 0) | |
574 | return r; | |
575 | ||
576 | if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE) | |
577 | s->notify_access = NOTIFY_MAIN; | |
578 | ||
579 | if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE) | |
580 | s->notify_access = NOTIFY_MAIN; | |
581 | ||
582 | if (s->bus_name) { | |
583 | const char *n; | |
584 | ||
585 | n = strjoina(s->bus_name, ".busname"); | |
586 | r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, n, NULL, true); | |
587 | if (r < 0) | |
588 | return r; | |
589 | ||
590 | r = unit_watch_bus_name(UNIT(s), s->bus_name); | |
591 | if (r == -EEXIST) | |
592 | return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name); | |
593 | if (r < 0) | |
594 | return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name); | |
595 | } | |
596 | ||
597 | if (UNIT(s)->default_dependencies) { | |
598 | r = service_add_default_dependencies(s); | |
599 | if (r < 0) | |
600 | return r; | |
601 | } | |
602 | ||
603 | return 0; | |
604 | } | |
605 | ||
606 | static int service_load(Unit *u) { | |
607 | Service *s = SERVICE(u); | |
608 | int r; | |
609 | ||
610 | assert(s); | |
611 | ||
612 | /* Load a .service file */ | |
613 | r = unit_load_fragment(u); | |
614 | if (r < 0) | |
615 | return r; | |
616 | ||
617 | /* Still nothing found? Then let's give up */ | |
618 | if (u->load_state == UNIT_STUB) | |
619 | return -ENOENT; | |
620 | ||
621 | /* This is a new unit? Then let's add in some extras */ | |
622 | if (u->load_state == UNIT_LOADED) { | |
623 | ||
624 | /* We were able to load something, then let's add in | |
625 | * the dropin directories. */ | |
626 | r = unit_load_dropin(u); | |
627 | if (r < 0) | |
628 | return r; | |
629 | ||
630 | /* This is a new unit? Then let's add in some | |
631 | * extras */ | |
632 | r = service_add_extras(s); | |
633 | if (r < 0) | |
634 | return r; | |
635 | } | |
636 | ||
637 | return service_verify(s); | |
638 | } | |
639 | ||
640 | static void service_dump(Unit *u, FILE *f, const char *prefix) { | |
641 | ServiceExecCommand c; | |
642 | Service *s = SERVICE(u); | |
643 | const char *prefix2; | |
644 | ||
645 | assert(s); | |
646 | ||
647 | prefix = strempty(prefix); | |
648 | prefix2 = strjoina(prefix, "\t"); | |
649 | ||
650 | fprintf(f, | |
651 | "%sService State: %s\n" | |
652 | "%sResult: %s\n" | |
653 | "%sReload Result: %s\n" | |
654 | "%sPermissionsStartOnly: %s\n" | |
655 | "%sRootDirectoryStartOnly: %s\n" | |
656 | "%sRemainAfterExit: %s\n" | |
657 | "%sGuessMainPID: %s\n" | |
658 | "%sType: %s\n" | |
659 | "%sRestart: %s\n" | |
660 | "%sNotifyAccess: %s\n" | |
661 | "%sNotifyState: %s\n", | |
662 | prefix, service_state_to_string(s->state), | |
663 | prefix, service_result_to_string(s->result), | |
664 | prefix, service_result_to_string(s->reload_result), | |
665 | prefix, yes_no(s->permissions_start_only), | |
666 | prefix, yes_no(s->root_directory_start_only), | |
667 | prefix, yes_no(s->remain_after_exit), | |
668 | prefix, yes_no(s->guess_main_pid), | |
669 | prefix, service_type_to_string(s->type), | |
670 | prefix, service_restart_to_string(s->restart), | |
671 | prefix, notify_access_to_string(s->notify_access), | |
672 | prefix, notify_state_to_string(s->notify_state)); | |
673 | ||
674 | if (s->control_pid > 0) | |
675 | fprintf(f, | |
676 | "%sControl PID: "PID_FMT"\n", | |
677 | prefix, s->control_pid); | |
678 | ||
679 | if (s->main_pid > 0) | |
680 | fprintf(f, | |
681 | "%sMain PID: "PID_FMT"\n" | |
682 | "%sMain PID Known: %s\n" | |
683 | "%sMain PID Alien: %s\n", | |
684 | prefix, s->main_pid, | |
685 | prefix, yes_no(s->main_pid_known), | |
686 | prefix, yes_no(s->main_pid_alien)); | |
687 | ||
688 | if (s->pid_file) | |
689 | fprintf(f, | |
690 | "%sPIDFile: %s\n", | |
691 | prefix, s->pid_file); | |
692 | ||
693 | if (s->bus_name) | |
694 | fprintf(f, | |
695 | "%sBusName: %s\n" | |
696 | "%sBus Name Good: %s\n", | |
697 | prefix, s->bus_name, | |
698 | prefix, yes_no(s->bus_name_good)); | |
699 | ||
700 | kill_context_dump(&s->kill_context, f, prefix); | |
701 | exec_context_dump(&s->exec_context, f, prefix); | |
702 | ||
703 | for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) { | |
704 | ||
705 | if (!s->exec_command[c]) | |
706 | continue; | |
707 | ||
708 | fprintf(f, "%s-> %s:\n", | |
709 | prefix, service_exec_command_to_string(c)); | |
710 | ||
711 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
712 | } | |
713 | ||
714 | if (s->status_text) | |
715 | fprintf(f, "%sStatus Text: %s\n", | |
716 | prefix, s->status_text); | |
717 | ||
718 | if (s->n_fd_store_max > 0) | |
719 | fprintf(f, | |
720 | "%sFile Descriptor Store Max: %u\n" | |
721 | "%sFile Descriptor Store Current: %u\n", | |
722 | prefix, s->n_fd_store_max, | |
723 | prefix, s->n_fd_store); | |
724 | } | |
725 | ||
726 | static int service_load_pid_file(Service *s, bool may_warn) { | |
727 | _cleanup_free_ char *k = NULL; | |
728 | int r; | |
729 | pid_t pid; | |
730 | ||
731 | assert(s); | |
732 | ||
733 | if (!s->pid_file) | |
734 | return -ENOENT; | |
735 | ||
736 | r = read_one_line_file(s->pid_file, &k); | |
737 | if (r < 0) { | |
738 | if (may_warn) | |
739 | log_unit_info_errno(UNIT(s), r, "PID file %s not readable (yet?) after %s: %m", s->pid_file, service_state_to_string(s->state)); | |
740 | return r; | |
741 | } | |
742 | ||
743 | r = parse_pid(k, &pid); | |
744 | if (r < 0) { | |
745 | if (may_warn) | |
746 | log_unit_info_errno(UNIT(s), r, "Failed to read PID from file %s: %m", s->pid_file); | |
747 | return r; | |
748 | } | |
749 | ||
750 | if (!pid_is_alive(pid)) { | |
751 | if (may_warn) | |
752 | log_unit_info(UNIT(s), "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file); | |
753 | return -ESRCH; | |
754 | } | |
755 | ||
756 | if (s->main_pid_known) { | |
757 | if (pid == s->main_pid) | |
758 | return 0; | |
759 | ||
760 | log_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid); | |
761 | ||
762 | service_unwatch_main_pid(s); | |
763 | s->main_pid_known = false; | |
764 | } else | |
765 | log_unit_debug(UNIT(s), "Main PID loaded: "PID_FMT, pid); | |
766 | ||
767 | r = service_set_main_pid(s, pid); | |
768 | if (r < 0) | |
769 | return r; | |
770 | ||
771 | r = unit_watch_pid(UNIT(s), pid); | |
772 | if (r < 0) { | |
773 | /* FIXME: we need to do something here */ | |
774 | log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid); | |
775 | return r; | |
776 | } | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
781 | static int service_search_main_pid(Service *s) { | |
782 | pid_t pid = 0; | |
783 | int r; | |
784 | ||
785 | assert(s); | |
786 | ||
787 | /* If we know it anyway, don't ever fallback to unreliable | |
788 | * heuristics */ | |
789 | if (s->main_pid_known) | |
790 | return 0; | |
791 | ||
792 | if (!s->guess_main_pid) | |
793 | return 0; | |
794 | ||
795 | assert(s->main_pid <= 0); | |
796 | ||
797 | r = unit_search_main_pid(UNIT(s), &pid); | |
798 | if (r < 0) | |
799 | return r; | |
800 | ||
801 | log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid); | |
802 | r = service_set_main_pid(s, pid); | |
803 | if (r < 0) | |
804 | return r; | |
805 | ||
806 | r = unit_watch_pid(UNIT(s), pid); | |
807 | if (r < 0) { | |
808 | /* FIXME: we need to do something here */ | |
809 | log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid); | |
810 | return r; | |
811 | } | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
816 | static void service_set_state(Service *s, ServiceState state) { | |
817 | ServiceState old_state; | |
818 | const UnitActiveState *table; | |
819 | ||
820 | assert(s); | |
821 | ||
822 | table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table; | |
823 | ||
824 | old_state = s->state; | |
825 | s->state = state; | |
826 | ||
827 | service_unwatch_pid_file(s); | |
828 | ||
829 | if (!IN_SET(state, | |
830 | SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, | |
831 | SERVICE_RELOAD, | |
832 | SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
833 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, | |
834 | SERVICE_AUTO_RESTART)) | |
835 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
836 | ||
837 | if (!IN_SET(state, | |
838 | SERVICE_START, SERVICE_START_POST, | |
839 | SERVICE_RUNNING, SERVICE_RELOAD, | |
840 | SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
841 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) { | |
842 | service_unwatch_main_pid(s); | |
843 | s->main_command = NULL; | |
844 | } | |
845 | ||
846 | if (!IN_SET(state, | |
847 | SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, | |
848 | SERVICE_RELOAD, | |
849 | SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
850 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) { | |
851 | service_unwatch_control_pid(s); | |
852 | s->control_command = NULL; | |
853 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
854 | } | |
855 | ||
856 | if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART)) | |
857 | unit_unwatch_all_pids(UNIT(s)); | |
858 | ||
859 | if (!IN_SET(state, | |
860 | SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, | |
861 | SERVICE_RUNNING, SERVICE_RELOAD, | |
862 | SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
863 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) && | |
864 | !(state == SERVICE_DEAD && UNIT(s)->job)) { | |
865 | service_close_socket_fd(s); | |
866 | service_connection_unref(s); | |
867 | } | |
868 | ||
869 | if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) | |
870 | service_stop_watchdog(s); | |
871 | ||
872 | /* For the inactive states unit_notify() will trim the cgroup, | |
873 | * but for exit we have to do that ourselves... */ | |
874 | if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0) | |
875 | unit_prune_cgroup(UNIT(s)); | |
876 | ||
877 | /* For remain_after_exit services, let's see if we can "release" the | |
878 | * hold on the console, since unit_notify() only does that in case of | |
879 | * change of state */ | |
880 | if (state == SERVICE_EXITED && | |
881 | s->remain_after_exit && | |
882 | UNIT(s)->manager->n_on_console > 0) { | |
883 | ||
884 | ExecContext *ec; | |
885 | ||
886 | ec = unit_get_exec_context(UNIT(s)); | |
887 | if (ec && exec_context_may_touch_console(ec)) { | |
888 | Manager *m = UNIT(s)->manager; | |
889 | ||
890 | m->n_on_console --; | |
891 | if (m->n_on_console == 0) | |
892 | /* unset no_console_output flag, since the console is free */ | |
893 | m->no_console_output = false; | |
894 | } | |
895 | } | |
896 | ||
897 | if (old_state != state) | |
898 | log_unit_debug(UNIT(s), "Changed %s -> %s", service_state_to_string(old_state), service_state_to_string(state)); | |
899 | ||
900 | unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS); | |
901 | } | |
902 | ||
903 | static int service_coldplug(Unit *u) { | |
904 | Service *s = SERVICE(u); | |
905 | int r; | |
906 | ||
907 | assert(s); | |
908 | assert(s->state == SERVICE_DEAD); | |
909 | ||
910 | if (s->deserialized_state != s->state) { | |
911 | ||
912 | if (IN_SET(s->deserialized_state, | |
913 | SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, | |
914 | SERVICE_RELOAD, | |
915 | SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
916 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) { | |
917 | ||
918 | usec_t k; | |
919 | ||
920 | k = IN_SET(s->deserialized_state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec; | |
921 | ||
922 | /* For the start/stop timeouts 0 means off */ | |
923 | if (k > 0) { | |
924 | r = service_arm_timer(s, k); | |
925 | if (r < 0) | |
926 | return r; | |
927 | } | |
928 | } | |
929 | ||
930 | if (s->deserialized_state == SERVICE_AUTO_RESTART) { | |
931 | ||
932 | /* The restart timeouts 0 means immediately */ | |
933 | r = service_arm_timer(s, s->restart_usec); | |
934 | if (r < 0) | |
935 | return r; | |
936 | } | |
937 | ||
938 | if (pid_is_unwaited(s->main_pid) && | |
939 | ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) || | |
940 | IN_SET(s->deserialized_state, | |
941 | SERVICE_START, SERVICE_START_POST, | |
942 | SERVICE_RUNNING, SERVICE_RELOAD, | |
943 | SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
944 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) { | |
945 | r = unit_watch_pid(UNIT(s), s->main_pid); | |
946 | if (r < 0) | |
947 | return r; | |
948 | } | |
949 | ||
950 | if (pid_is_unwaited(s->control_pid) && | |
951 | IN_SET(s->deserialized_state, | |
952 | SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, | |
953 | SERVICE_RELOAD, | |
954 | SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
955 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) { | |
956 | r = unit_watch_pid(UNIT(s), s->control_pid); | |
957 | if (r < 0) | |
958 | return r; | |
959 | } | |
960 | ||
961 | if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART)) | |
962 | unit_watch_all_pids(UNIT(s)); | |
963 | ||
964 | if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) | |
965 | service_start_watchdog(s); | |
966 | ||
967 | service_set_state(s, s->deserialized_state); | |
968 | } | |
969 | ||
970 | return 0; | |
971 | } | |
972 | ||
973 | static int service_collect_fds(Service *s, int **fds, char ***fd_names) { | |
974 | _cleanup_strv_free_ char **rfd_names = NULL; | |
975 | _cleanup_free_ int *rfds = NULL; | |
976 | int rn_fds = 0, r; | |
977 | ||
978 | assert(s); | |
979 | assert(fds); | |
980 | assert(fd_names); | |
981 | ||
982 | if (s->socket_fd >= 0) { | |
983 | ||
984 | /* Pass the per-connection socket */ | |
985 | ||
986 | rfds = new(int, 1); | |
987 | if (!rfds) | |
988 | return -ENOMEM; | |
989 | rfds[0] = s->socket_fd; | |
990 | ||
991 | rfd_names = strv_new("connection", NULL); | |
992 | if (!rfd_names) | |
993 | return -ENOMEM; | |
994 | ||
995 | rn_fds = 1; | |
996 | } else { | |
997 | Iterator i; | |
998 | Unit *u; | |
999 | ||
1000 | /* Pass all our configured sockets for singleton services */ | |
1001 | ||
1002 | SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) { | |
1003 | _cleanup_free_ int *cfds = NULL; | |
1004 | Socket *sock; | |
1005 | int cn_fds; | |
1006 | ||
1007 | if (u->type != UNIT_SOCKET) | |
1008 | continue; | |
1009 | ||
1010 | sock = SOCKET(u); | |
1011 | ||
1012 | cn_fds = socket_collect_fds(sock, &cfds); | |
1013 | if (cn_fds < 0) | |
1014 | return cn_fds; | |
1015 | ||
1016 | if (cn_fds <= 0) | |
1017 | continue; | |
1018 | ||
1019 | if (!rfds) { | |
1020 | rfds = cfds; | |
1021 | rn_fds = cn_fds; | |
1022 | ||
1023 | cfds = NULL; | |
1024 | } else { | |
1025 | int *t; | |
1026 | ||
1027 | t = realloc(rfds, (rn_fds + cn_fds) * sizeof(int)); | |
1028 | if (!t) | |
1029 | return -ENOMEM; | |
1030 | ||
1031 | memcpy(t + rn_fds, cfds, cn_fds * sizeof(int)); | |
1032 | ||
1033 | rfds = t; | |
1034 | rn_fds += cn_fds; | |
1035 | } | |
1036 | ||
1037 | r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds); | |
1038 | if (r < 0) | |
1039 | return r; | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | if (s->n_fd_store > 0) { | |
1044 | ServiceFDStore *fs; | |
1045 | char **nl; | |
1046 | int *t; | |
1047 | ||
1048 | t = realloc(rfds, (rn_fds + s->n_fd_store) * sizeof(int)); | |
1049 | if (!t) | |
1050 | return -ENOMEM; | |
1051 | ||
1052 | rfds = t; | |
1053 | ||
1054 | nl = realloc(rfd_names, (rn_fds + s->n_fd_store + 1) * sizeof(char*)); | |
1055 | if (!nl) | |
1056 | return -ENOMEM; | |
1057 | ||
1058 | rfd_names = nl; | |
1059 | ||
1060 | LIST_FOREACH(fd_store, fs, s->fd_store) { | |
1061 | rfds[rn_fds] = fs->fd; | |
1062 | rfd_names[rn_fds] = strdup(strempty(fs->fdname)); | |
1063 | if (!rfd_names[rn_fds]) | |
1064 | return -ENOMEM; | |
1065 | ||
1066 | rn_fds++; | |
1067 | } | |
1068 | ||
1069 | rfd_names[rn_fds] = NULL; | |
1070 | } | |
1071 | ||
1072 | *fds = rfds; | |
1073 | *fd_names = rfd_names; | |
1074 | ||
1075 | rfds = NULL; | |
1076 | rfd_names = NULL; | |
1077 | ||
1078 | return rn_fds; | |
1079 | } | |
1080 | ||
1081 | static int service_spawn( | |
1082 | Service *s, | |
1083 | ExecCommand *c, | |
1084 | usec_t timeout, | |
1085 | bool pass_fds, | |
1086 | bool apply_permissions, | |
1087 | bool apply_chroot, | |
1088 | bool apply_tty_stdin, | |
1089 | bool is_control, | |
1090 | pid_t *_pid) { | |
1091 | ||
1092 | _cleanup_strv_free_ char **argv = NULL, **final_env = NULL, **our_env = NULL, **fd_names = NULL; | |
1093 | _cleanup_free_ char *bus_endpoint_path = NULL; | |
1094 | _cleanup_free_ int *fds = NULL; | |
1095 | unsigned n_fds = 0, n_env = 0; | |
1096 | const char *path; | |
1097 | pid_t pid; | |
1098 | ||
1099 | ExecParameters exec_params = { | |
1100 | .apply_permissions = apply_permissions, | |
1101 | .apply_chroot = apply_chroot, | |
1102 | .apply_tty_stdin = apply_tty_stdin, | |
1103 | .bus_endpoint_fd = -1, | |
1104 | .stdin_fd = -1, | |
1105 | .stdout_fd = -1, | |
1106 | .stderr_fd = -1, | |
1107 | }; | |
1108 | ||
1109 | int r; | |
1110 | ||
1111 | assert(s); | |
1112 | assert(c); | |
1113 | assert(_pid); | |
1114 | ||
1115 | (void) unit_realize_cgroup(UNIT(s)); | |
1116 | if (s->reset_cpu_usage) { | |
1117 | (void) unit_reset_cpu_usage(UNIT(s)); | |
1118 | s->reset_cpu_usage = false; | |
1119 | } | |
1120 | ||
1121 | r = unit_setup_exec_runtime(UNIT(s)); | |
1122 | if (r < 0) | |
1123 | goto fail; | |
1124 | ||
1125 | if (pass_fds || | |
1126 | s->exec_context.std_input == EXEC_INPUT_SOCKET || | |
1127 | s->exec_context.std_output == EXEC_OUTPUT_SOCKET || | |
1128 | s->exec_context.std_error == EXEC_OUTPUT_SOCKET) { | |
1129 | ||
1130 | r = service_collect_fds(s, &fds, &fd_names); | |
1131 | if (r < 0) | |
1132 | goto fail; | |
1133 | ||
1134 | n_fds = r; | |
1135 | } | |
1136 | ||
1137 | if (timeout > 0) { | |
1138 | r = service_arm_timer(s, timeout); | |
1139 | if (r < 0) | |
1140 | goto fail; | |
1141 | } else | |
1142 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
1143 | ||
1144 | r = unit_full_printf_strv(UNIT(s), c->argv, &argv); | |
1145 | if (r < 0) | |
1146 | goto fail; | |
1147 | ||
1148 | our_env = new0(char*, 6); | |
1149 | if (!our_env) { | |
1150 | r = -ENOMEM; | |
1151 | goto fail; | |
1152 | } | |
1153 | ||
1154 | if (is_control ? s->notify_access == NOTIFY_ALL : s->notify_access != NOTIFY_NONE) | |
1155 | if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) { | |
1156 | r = -ENOMEM; | |
1157 | goto fail; | |
1158 | } | |
1159 | ||
1160 | if (s->main_pid > 0) | |
1161 | if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0) { | |
1162 | r = -ENOMEM; | |
1163 | goto fail; | |
1164 | } | |
1165 | ||
1166 | if (UNIT(s)->manager->running_as != MANAGER_SYSTEM) | |
1167 | if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0) { | |
1168 | r = -ENOMEM; | |
1169 | goto fail; | |
1170 | } | |
1171 | ||
1172 | if (s->socket_fd >= 0) { | |
1173 | union sockaddr_union sa; | |
1174 | socklen_t salen = sizeof(sa); | |
1175 | ||
1176 | r = getpeername(s->socket_fd, &sa.sa, &salen); | |
1177 | if (r < 0) { | |
1178 | r = -errno; | |
1179 | goto fail; | |
1180 | } | |
1181 | ||
1182 | if (IN_SET(sa.sa.sa_family, AF_INET, AF_INET6)) { | |
1183 | _cleanup_free_ char *addr = NULL; | |
1184 | char *t; | |
1185 | int port; | |
1186 | ||
1187 | r = sockaddr_pretty(&sa.sa, salen, true, false, &addr); | |
1188 | if (r < 0) | |
1189 | goto fail; | |
1190 | ||
1191 | t = strappend("REMOTE_ADDR=", addr); | |
1192 | if (!t) { | |
1193 | r = -ENOMEM; | |
1194 | goto fail; | |
1195 | } | |
1196 | our_env[n_env++] = t; | |
1197 | ||
1198 | port = sockaddr_port(&sa.sa); | |
1199 | if (port < 0) { | |
1200 | r = port; | |
1201 | goto fail; | |
1202 | } | |
1203 | ||
1204 | if (asprintf(&t, "REMOTE_PORT=%u", port) < 0) { | |
1205 | r = -ENOMEM; | |
1206 | goto fail; | |
1207 | } | |
1208 | our_env[n_env++] = t; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL); | |
1213 | if (!final_env) { | |
1214 | r = -ENOMEM; | |
1215 | goto fail; | |
1216 | } | |
1217 | ||
1218 | if (is_control && UNIT(s)->cgroup_path) { | |
1219 | path = strjoina(UNIT(s)->cgroup_path, "/control"); | |
1220 | (void) cg_create(SYSTEMD_CGROUP_CONTROLLER, path); | |
1221 | } else | |
1222 | path = UNIT(s)->cgroup_path; | |
1223 | ||
1224 | if (s->exec_context.bus_endpoint) { | |
1225 | r = bus_kernel_create_endpoint(UNIT(s)->manager->running_as == MANAGER_SYSTEM ? "system" : "user", | |
1226 | UNIT(s)->id, &bus_endpoint_path); | |
1227 | if (r < 0) | |
1228 | goto fail; | |
1229 | ||
1230 | /* Pass the fd to the exec_params so that the child process can upload the policy. | |
1231 | * Keep a reference to the fd in the service, so the endpoint is kept alive as long | |
1232 | * as the service is running. */ | |
1233 | exec_params.bus_endpoint_fd = s->bus_endpoint_fd = r; | |
1234 | } | |
1235 | ||
1236 | exec_params.argv = argv; | |
1237 | exec_params.fds = fds; | |
1238 | exec_params.fd_names = fd_names; | |
1239 | exec_params.n_fds = n_fds; | |
1240 | exec_params.environment = final_env; | |
1241 | exec_params.confirm_spawn = UNIT(s)->manager->confirm_spawn; | |
1242 | exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported; | |
1243 | exec_params.cgroup_path = path; | |
1244 | exec_params.cgroup_delegate = s->cgroup_context.delegate; | |
1245 | exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager); | |
1246 | exec_params.watchdog_usec = s->watchdog_usec; | |
1247 | exec_params.bus_endpoint_path = bus_endpoint_path; | |
1248 | exec_params.selinux_context_net = s->socket_fd_selinux_context_net; | |
1249 | if (s->type == SERVICE_IDLE) | |
1250 | exec_params.idle_pipe = UNIT(s)->manager->idle_pipe; | |
1251 | exec_params.stdin_fd = s->stdin_fd; | |
1252 | exec_params.stdout_fd = s->stdout_fd; | |
1253 | exec_params.stderr_fd = s->stderr_fd; | |
1254 | ||
1255 | r = exec_spawn(UNIT(s), | |
1256 | c, | |
1257 | &s->exec_context, | |
1258 | &exec_params, | |
1259 | s->exec_runtime, | |
1260 | &pid); | |
1261 | if (r < 0) | |
1262 | goto fail; | |
1263 | ||
1264 | r = unit_watch_pid(UNIT(s), pid); | |
1265 | if (r < 0) | |
1266 | /* FIXME: we need to do something here */ | |
1267 | goto fail; | |
1268 | ||
1269 | *_pid = pid; | |
1270 | ||
1271 | return 0; | |
1272 | ||
1273 | fail: | |
1274 | if (timeout) | |
1275 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
1276 | ||
1277 | return r; | |
1278 | } | |
1279 | ||
1280 | static int main_pid_good(Service *s) { | |
1281 | assert(s); | |
1282 | ||
1283 | /* Returns 0 if the pid is dead, 1 if it is good, -1 if we | |
1284 | * don't know */ | |
1285 | ||
1286 | /* If we know the pid file, then let's just check if it is | |
1287 | * still valid */ | |
1288 | if (s->main_pid_known) { | |
1289 | ||
1290 | /* If it's an alien child let's check if it is still | |
1291 | * alive ... */ | |
1292 | if (s->main_pid_alien && s->main_pid > 0) | |
1293 | return pid_is_alive(s->main_pid); | |
1294 | ||
1295 | /* .. otherwise assume we'll get a SIGCHLD for it, | |
1296 | * which we really should wait for to collect exit | |
1297 | * status and code */ | |
1298 | return s->main_pid > 0; | |
1299 | } | |
1300 | ||
1301 | /* We don't know the pid */ | |
1302 | return -EAGAIN; | |
1303 | } | |
1304 | ||
1305 | _pure_ static int control_pid_good(Service *s) { | |
1306 | assert(s); | |
1307 | ||
1308 | return s->control_pid > 0; | |
1309 | } | |
1310 | ||
1311 | static int cgroup_good(Service *s) { | |
1312 | int r; | |
1313 | ||
1314 | assert(s); | |
1315 | ||
1316 | if (!UNIT(s)->cgroup_path) | |
1317 | return 0; | |
1318 | ||
1319 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path); | |
1320 | if (r < 0) | |
1321 | return r; | |
1322 | ||
1323 | return !r; | |
1324 | } | |
1325 | ||
1326 | static bool service_shall_restart(Service *s) { | |
1327 | assert(s); | |
1328 | ||
1329 | /* Don't restart after manual stops */ | |
1330 | if (s->forbid_restart) | |
1331 | return false; | |
1332 | ||
1333 | /* Never restart if this is configured as special exception */ | |
1334 | if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status)) | |
1335 | return false; | |
1336 | ||
1337 | /* Restart if the exit code/status are configured as restart triggers */ | |
1338 | if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status)) | |
1339 | return true; | |
1340 | ||
1341 | switch (s->restart) { | |
1342 | ||
1343 | case SERVICE_RESTART_NO: | |
1344 | return false; | |
1345 | ||
1346 | case SERVICE_RESTART_ALWAYS: | |
1347 | return true; | |
1348 | ||
1349 | case SERVICE_RESTART_ON_SUCCESS: | |
1350 | return s->result == SERVICE_SUCCESS; | |
1351 | ||
1352 | case SERVICE_RESTART_ON_FAILURE: | |
1353 | return s->result != SERVICE_SUCCESS; | |
1354 | ||
1355 | case SERVICE_RESTART_ON_ABNORMAL: | |
1356 | return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE); | |
1357 | ||
1358 | case SERVICE_RESTART_ON_WATCHDOG: | |
1359 | return s->result == SERVICE_FAILURE_WATCHDOG; | |
1360 | ||
1361 | case SERVICE_RESTART_ON_ABORT: | |
1362 | return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP); | |
1363 | ||
1364 | default: | |
1365 | assert_not_reached("unknown restart setting"); | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) { | |
1370 | int r; | |
1371 | assert(s); | |
1372 | ||
1373 | if (f != SERVICE_SUCCESS) | |
1374 | s->result = f; | |
1375 | ||
1376 | service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD); | |
1377 | ||
1378 | if (s->result != SERVICE_SUCCESS) { | |
1379 | log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result)); | |
1380 | failure_action(UNIT(s)->manager, s->failure_action, s->reboot_arg); | |
1381 | } | |
1382 | ||
1383 | if (allow_restart && service_shall_restart(s)) { | |
1384 | ||
1385 | r = service_arm_timer(s, s->restart_usec); | |
1386 | if (r < 0) | |
1387 | goto fail; | |
1388 | ||
1389 | service_set_state(s, SERVICE_AUTO_RESTART); | |
1390 | } | |
1391 | ||
1392 | /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */ | |
1393 | s->forbid_restart = false; | |
1394 | ||
1395 | /* We want fresh tmpdirs in case service is started again immediately */ | |
1396 | exec_runtime_destroy(s->exec_runtime); | |
1397 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); | |
1398 | ||
1399 | /* Also, remove the runtime directory in */ | |
1400 | exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager)); | |
1401 | ||
1402 | /* Try to delete the pid file. At this point it will be | |
1403 | * out-of-date, and some software might be confused by it, so | |
1404 | * let's remove it. */ | |
1405 | if (s->pid_file) | |
1406 | unlink_noerrno(s->pid_file); | |
1407 | ||
1408 | return; | |
1409 | ||
1410 | fail: | |
1411 | log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m"); | |
1412 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false); | |
1413 | } | |
1414 | ||
1415 | static void service_enter_stop_post(Service *s, ServiceResult f) { | |
1416 | int r; | |
1417 | assert(s); | |
1418 | ||
1419 | if (f != SERVICE_SUCCESS) | |
1420 | s->result = f; | |
1421 | ||
1422 | service_unwatch_control_pid(s); | |
1423 | unit_watch_all_pids(UNIT(s)); | |
1424 | ||
1425 | s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]; | |
1426 | if (s->control_command) { | |
1427 | s->control_command_id = SERVICE_EXEC_STOP_POST; | |
1428 | ||
1429 | r = service_spawn(s, | |
1430 | s->control_command, | |
1431 | s->timeout_stop_usec, | |
1432 | false, | |
1433 | !s->permissions_start_only, | |
1434 | !s->root_directory_start_only, | |
1435 | true, | |
1436 | true, | |
1437 | &s->control_pid); | |
1438 | if (r < 0) | |
1439 | goto fail; | |
1440 | ||
1441 | service_set_state(s, SERVICE_STOP_POST); | |
1442 | } else | |
1443 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS); | |
1444 | ||
1445 | return; | |
1446 | ||
1447 | fail: | |
1448 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m"); | |
1449 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
1450 | } | |
1451 | ||
1452 | static int state_to_kill_operation(ServiceState state) { | |
1453 | switch (state) { | |
1454 | ||
1455 | case SERVICE_STOP_SIGABRT: | |
1456 | return KILL_ABORT; | |
1457 | ||
1458 | case SERVICE_STOP_SIGTERM: | |
1459 | case SERVICE_FINAL_SIGTERM: | |
1460 | return KILL_TERMINATE; | |
1461 | ||
1462 | case SERVICE_STOP_SIGKILL: | |
1463 | case SERVICE_FINAL_SIGKILL: | |
1464 | return KILL_KILL; | |
1465 | ||
1466 | default: | |
1467 | return _KILL_OPERATION_INVALID; | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) { | |
1472 | int r; | |
1473 | ||
1474 | assert(s); | |
1475 | ||
1476 | if (f != SERVICE_SUCCESS) | |
1477 | s->result = f; | |
1478 | ||
1479 | unit_watch_all_pids(UNIT(s)); | |
1480 | ||
1481 | r = unit_kill_context( | |
1482 | UNIT(s), | |
1483 | &s->kill_context, | |
1484 | state_to_kill_operation(state), | |
1485 | s->main_pid, | |
1486 | s->control_pid, | |
1487 | s->main_pid_alien); | |
1488 | ||
1489 | if (r < 0) | |
1490 | goto fail; | |
1491 | ||
1492 | if (r > 0) { | |
1493 | if (s->timeout_stop_usec > 0) { | |
1494 | r = service_arm_timer(s, s->timeout_stop_usec); | |
1495 | if (r < 0) | |
1496 | goto fail; | |
1497 | } | |
1498 | ||
1499 | service_set_state(s, state); | |
1500 | } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill) | |
1501 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS); | |
1502 | else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL)) | |
1503 | service_enter_stop_post(s, SERVICE_SUCCESS); | |
1504 | else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill) | |
1505 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS); | |
1506 | else | |
1507 | service_enter_dead(s, SERVICE_SUCCESS, true); | |
1508 | ||
1509 | return; | |
1510 | ||
1511 | fail: | |
1512 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); | |
1513 | ||
1514 | if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL)) | |
1515 | service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES); | |
1516 | else | |
1517 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true); | |
1518 | } | |
1519 | ||
1520 | static void service_enter_stop_by_notify(Service *s) { | |
1521 | assert(s); | |
1522 | ||
1523 | unit_watch_all_pids(UNIT(s)); | |
1524 | ||
1525 | if (s->timeout_stop_usec > 0) | |
1526 | service_arm_timer(s, s->timeout_stop_usec); | |
1527 | ||
1528 | /* The service told us it's stopping, so it's as if we SIGTERM'd it. */ | |
1529 | service_set_state(s, SERVICE_STOP_SIGTERM); | |
1530 | } | |
1531 | ||
1532 | static void service_enter_stop(Service *s, ServiceResult f) { | |
1533 | int r; | |
1534 | ||
1535 | assert(s); | |
1536 | ||
1537 | if (f != SERVICE_SUCCESS) | |
1538 | s->result = f; | |
1539 | ||
1540 | service_unwatch_control_pid(s); | |
1541 | unit_watch_all_pids(UNIT(s)); | |
1542 | ||
1543 | s->control_command = s->exec_command[SERVICE_EXEC_STOP]; | |
1544 | if (s->control_command) { | |
1545 | s->control_command_id = SERVICE_EXEC_STOP; | |
1546 | ||
1547 | r = service_spawn(s, | |
1548 | s->control_command, | |
1549 | s->timeout_stop_usec, | |
1550 | false, | |
1551 | !s->permissions_start_only, | |
1552 | !s->root_directory_start_only, | |
1553 | false, | |
1554 | true, | |
1555 | &s->control_pid); | |
1556 | if (r < 0) | |
1557 | goto fail; | |
1558 | ||
1559 | service_set_state(s, SERVICE_STOP); | |
1560 | } else | |
1561 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS); | |
1562 | ||
1563 | return; | |
1564 | ||
1565 | fail: | |
1566 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m"); | |
1567 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
1568 | } | |
1569 | ||
1570 | static bool service_good(Service *s) { | |
1571 | int main_pid_ok; | |
1572 | assert(s); | |
1573 | ||
1574 | if (s->type == SERVICE_DBUS && !s->bus_name_good) | |
1575 | return false; | |
1576 | ||
1577 | main_pid_ok = main_pid_good(s); | |
1578 | if (main_pid_ok > 0) /* It's alive */ | |
1579 | return true; | |
1580 | if (main_pid_ok == 0) /* It's dead */ | |
1581 | return false; | |
1582 | ||
1583 | /* OK, we don't know anything about the main PID, maybe | |
1584 | * because there is none. Let's check the control group | |
1585 | * instead. */ | |
1586 | ||
1587 | return cgroup_good(s) != 0; | |
1588 | } | |
1589 | ||
1590 | static void service_enter_running(Service *s, ServiceResult f) { | |
1591 | assert(s); | |
1592 | ||
1593 | if (f != SERVICE_SUCCESS) | |
1594 | s->result = f; | |
1595 | ||
1596 | if (service_good(s)) { | |
1597 | ||
1598 | /* If there are any queued up sd_notify() | |
1599 | * notifications, process them now */ | |
1600 | if (s->notify_state == NOTIFY_RELOADING) | |
1601 | service_enter_reload_by_notify(s); | |
1602 | else if (s->notify_state == NOTIFY_STOPPING) | |
1603 | service_enter_stop_by_notify(s); | |
1604 | else | |
1605 | service_set_state(s, SERVICE_RUNNING); | |
1606 | ||
1607 | } else if (s->remain_after_exit) | |
1608 | service_set_state(s, SERVICE_EXITED); | |
1609 | else | |
1610 | service_enter_stop(s, SERVICE_SUCCESS); | |
1611 | } | |
1612 | ||
1613 | static void service_enter_start_post(Service *s) { | |
1614 | int r; | |
1615 | assert(s); | |
1616 | ||
1617 | service_unwatch_control_pid(s); | |
1618 | service_reset_watchdog(s); | |
1619 | ||
1620 | s->control_command = s->exec_command[SERVICE_EXEC_START_POST]; | |
1621 | if (s->control_command) { | |
1622 | s->control_command_id = SERVICE_EXEC_START_POST; | |
1623 | ||
1624 | r = service_spawn(s, | |
1625 | s->control_command, | |
1626 | s->timeout_start_usec, | |
1627 | false, | |
1628 | !s->permissions_start_only, | |
1629 | !s->root_directory_start_only, | |
1630 | false, | |
1631 | true, | |
1632 | &s->control_pid); | |
1633 | if (r < 0) | |
1634 | goto fail; | |
1635 | ||
1636 | service_set_state(s, SERVICE_START_POST); | |
1637 | } else | |
1638 | service_enter_running(s, SERVICE_SUCCESS); | |
1639 | ||
1640 | return; | |
1641 | ||
1642 | fail: | |
1643 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m"); | |
1644 | service_enter_stop(s, SERVICE_FAILURE_RESOURCES); | |
1645 | } | |
1646 | ||
1647 | static void service_kill_control_processes(Service *s) { | |
1648 | char *p; | |
1649 | ||
1650 | if (!UNIT(s)->cgroup_path) | |
1651 | return; | |
1652 | ||
1653 | p = strjoina(UNIT(s)->cgroup_path, "/control"); | |
1654 | cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL); | |
1655 | } | |
1656 | ||
1657 | static void service_enter_start(Service *s) { | |
1658 | ExecCommand *c; | |
1659 | pid_t pid; | |
1660 | int r; | |
1661 | ||
1662 | assert(s); | |
1663 | ||
1664 | service_unwatch_control_pid(s); | |
1665 | service_unwatch_main_pid(s); | |
1666 | ||
1667 | /* We want to ensure that nobody leaks processes from | |
1668 | * START_PRE here, so let's go on a killing spree, People | |
1669 | * should not spawn long running processes from START_PRE. */ | |
1670 | service_kill_control_processes(s); | |
1671 | ||
1672 | if (s->type == SERVICE_FORKING) { | |
1673 | s->control_command_id = SERVICE_EXEC_START; | |
1674 | c = s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
1675 | ||
1676 | s->main_command = NULL; | |
1677 | } else { | |
1678 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
1679 | s->control_command = NULL; | |
1680 | ||
1681 | c = s->main_command = s->exec_command[SERVICE_EXEC_START]; | |
1682 | } | |
1683 | ||
1684 | if (!c) { | |
1685 | assert(s->type == SERVICE_ONESHOT); | |
1686 | service_enter_start_post(s); | |
1687 | return; | |
1688 | } | |
1689 | ||
1690 | r = service_spawn(s, | |
1691 | c, | |
1692 | IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_NOTIFY, SERVICE_ONESHOT) ? s->timeout_start_usec : 0, | |
1693 | true, | |
1694 | true, | |
1695 | true, | |
1696 | true, | |
1697 | false, | |
1698 | &pid); | |
1699 | if (r < 0) | |
1700 | goto fail; | |
1701 | ||
1702 | if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) { | |
1703 | /* For simple services we immediately start | |
1704 | * the START_POST binaries. */ | |
1705 | ||
1706 | service_set_main_pid(s, pid); | |
1707 | service_enter_start_post(s); | |
1708 | ||
1709 | } else if (s->type == SERVICE_FORKING) { | |
1710 | ||
1711 | /* For forking services we wait until the start | |
1712 | * process exited. */ | |
1713 | ||
1714 | s->control_pid = pid; | |
1715 | service_set_state(s, SERVICE_START); | |
1716 | ||
1717 | } else if (s->type == SERVICE_ONESHOT || | |
1718 | s->type == SERVICE_DBUS || | |
1719 | s->type == SERVICE_NOTIFY) { | |
1720 | ||
1721 | /* For oneshot services we wait until the start | |
1722 | * process exited, too, but it is our main process. */ | |
1723 | ||
1724 | /* For D-Bus services we know the main pid right away, | |
1725 | * but wait for the bus name to appear on the | |
1726 | * bus. Notify services are similar. */ | |
1727 | ||
1728 | service_set_main_pid(s, pid); | |
1729 | service_set_state(s, SERVICE_START); | |
1730 | } else | |
1731 | assert_not_reached("Unknown service type"); | |
1732 | ||
1733 | return; | |
1734 | ||
1735 | fail: | |
1736 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m"); | |
1737 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
1738 | } | |
1739 | ||
1740 | static void service_enter_start_pre(Service *s) { | |
1741 | int r; | |
1742 | ||
1743 | assert(s); | |
1744 | ||
1745 | service_unwatch_control_pid(s); | |
1746 | ||
1747 | s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]; | |
1748 | if (s->control_command) { | |
1749 | /* Before we start anything, let's clear up what might | |
1750 | * be left from previous runs. */ | |
1751 | service_kill_control_processes(s); | |
1752 | ||
1753 | s->control_command_id = SERVICE_EXEC_START_PRE; | |
1754 | ||
1755 | r = service_spawn(s, | |
1756 | s->control_command, | |
1757 | s->timeout_start_usec, | |
1758 | false, | |
1759 | !s->permissions_start_only, | |
1760 | !s->root_directory_start_only, | |
1761 | true, | |
1762 | true, | |
1763 | &s->control_pid); | |
1764 | if (r < 0) | |
1765 | goto fail; | |
1766 | ||
1767 | service_set_state(s, SERVICE_START_PRE); | |
1768 | } else | |
1769 | service_enter_start(s); | |
1770 | ||
1771 | return; | |
1772 | ||
1773 | fail: | |
1774 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m"); | |
1775 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true); | |
1776 | } | |
1777 | ||
1778 | static void service_enter_restart(Service *s) { | |
1779 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
1780 | int r; | |
1781 | ||
1782 | assert(s); | |
1783 | ||
1784 | if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) { | |
1785 | /* Don't restart things if we are going down anyway */ | |
1786 | log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart."); | |
1787 | ||
1788 | r = service_arm_timer(s, s->restart_usec); | |
1789 | if (r < 0) | |
1790 | goto fail; | |
1791 | ||
1792 | return; | |
1793 | } | |
1794 | ||
1795 | /* Any units that are bound to this service must also be | |
1796 | * restarted. We use JOB_RESTART (instead of the more obvious | |
1797 | * JOB_START) here so that those dependency jobs will be added | |
1798 | * as well. */ | |
1799 | r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL); | |
1800 | if (r < 0) | |
1801 | goto fail; | |
1802 | ||
1803 | /* Note that we stay in the SERVICE_AUTO_RESTART state here, | |
1804 | * it will be canceled as part of the service_stop() call that | |
1805 | * is executed as part of JOB_RESTART. */ | |
1806 | ||
1807 | log_unit_debug(UNIT(s), "Scheduled restart job."); | |
1808 | return; | |
1809 | ||
1810 | fail: | |
1811 | log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r)); | |
1812 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false); | |
1813 | } | |
1814 | ||
1815 | static void service_enter_reload_by_notify(Service *s) { | |
1816 | assert(s); | |
1817 | ||
1818 | if (s->timeout_start_usec > 0) | |
1819 | service_arm_timer(s, s->timeout_start_usec); | |
1820 | ||
1821 | service_set_state(s, SERVICE_RELOAD); | |
1822 | } | |
1823 | ||
1824 | static void service_enter_reload(Service *s) { | |
1825 | int r; | |
1826 | ||
1827 | assert(s); | |
1828 | ||
1829 | service_unwatch_control_pid(s); | |
1830 | s->reload_result = SERVICE_SUCCESS; | |
1831 | ||
1832 | s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]; | |
1833 | if (s->control_command) { | |
1834 | s->control_command_id = SERVICE_EXEC_RELOAD; | |
1835 | ||
1836 | r = service_spawn(s, | |
1837 | s->control_command, | |
1838 | s->timeout_start_usec, | |
1839 | false, | |
1840 | !s->permissions_start_only, | |
1841 | !s->root_directory_start_only, | |
1842 | false, | |
1843 | true, | |
1844 | &s->control_pid); | |
1845 | if (r < 0) | |
1846 | goto fail; | |
1847 | ||
1848 | service_set_state(s, SERVICE_RELOAD); | |
1849 | } else | |
1850 | service_enter_running(s, SERVICE_SUCCESS); | |
1851 | ||
1852 | return; | |
1853 | ||
1854 | fail: | |
1855 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m"); | |
1856 | s->reload_result = SERVICE_FAILURE_RESOURCES; | |
1857 | service_enter_running(s, SERVICE_SUCCESS); | |
1858 | } | |
1859 | ||
1860 | static void service_run_next_control(Service *s) { | |
1861 | int r; | |
1862 | ||
1863 | assert(s); | |
1864 | assert(s->control_command); | |
1865 | assert(s->control_command->command_next); | |
1866 | ||
1867 | assert(s->control_command_id != SERVICE_EXEC_START); | |
1868 | ||
1869 | s->control_command = s->control_command->command_next; | |
1870 | service_unwatch_control_pid(s); | |
1871 | ||
1872 | r = service_spawn(s, | |
1873 | s->control_command, | |
1874 | IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec, | |
1875 | false, | |
1876 | !s->permissions_start_only, | |
1877 | !s->root_directory_start_only, | |
1878 | s->control_command_id == SERVICE_EXEC_START_PRE || | |
1879 | s->control_command_id == SERVICE_EXEC_STOP_POST, | |
1880 | true, | |
1881 | &s->control_pid); | |
1882 | if (r < 0) | |
1883 | goto fail; | |
1884 | ||
1885 | return; | |
1886 | ||
1887 | fail: | |
1888 | log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m"); | |
1889 | ||
1890 | if (s->state == SERVICE_START_PRE) | |
1891 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
1892 | else if (s->state == SERVICE_STOP) | |
1893 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
1894 | else if (s->state == SERVICE_STOP_POST) | |
1895 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true); | |
1896 | else if (s->state == SERVICE_RELOAD) { | |
1897 | s->reload_result = SERVICE_FAILURE_RESOURCES; | |
1898 | service_enter_running(s, SERVICE_SUCCESS); | |
1899 | } else | |
1900 | service_enter_stop(s, SERVICE_FAILURE_RESOURCES); | |
1901 | } | |
1902 | ||
1903 | static void service_run_next_main(Service *s) { | |
1904 | pid_t pid; | |
1905 | int r; | |
1906 | ||
1907 | assert(s); | |
1908 | assert(s->main_command); | |
1909 | assert(s->main_command->command_next); | |
1910 | assert(s->type == SERVICE_ONESHOT); | |
1911 | ||
1912 | s->main_command = s->main_command->command_next; | |
1913 | service_unwatch_main_pid(s); | |
1914 | ||
1915 | r = service_spawn(s, | |
1916 | s->main_command, | |
1917 | s->timeout_start_usec, | |
1918 | true, | |
1919 | true, | |
1920 | true, | |
1921 | true, | |
1922 | false, | |
1923 | &pid); | |
1924 | if (r < 0) | |
1925 | goto fail; | |
1926 | ||
1927 | service_set_main_pid(s, pid); | |
1928 | ||
1929 | return; | |
1930 | ||
1931 | fail: | |
1932 | log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m"); | |
1933 | service_enter_stop(s, SERVICE_FAILURE_RESOURCES); | |
1934 | } | |
1935 | ||
1936 | static int service_start_limit_test(Service *s) { | |
1937 | assert(s); | |
1938 | ||
1939 | if (ratelimit_test(&s->start_limit)) | |
1940 | return 0; | |
1941 | ||
1942 | log_unit_warning(UNIT(s), "Start request repeated too quickly."); | |
1943 | ||
1944 | return failure_action(UNIT(s)->manager, s->start_limit_action, s->reboot_arg); | |
1945 | } | |
1946 | ||
1947 | static int service_start(Unit *u) { | |
1948 | Service *s = SERVICE(u); | |
1949 | int r; | |
1950 | ||
1951 | assert(s); | |
1952 | ||
1953 | /* We cannot fulfill this request right now, try again later | |
1954 | * please! */ | |
1955 | if (IN_SET(s->state, | |
1956 | SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
1957 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) | |
1958 | return -EAGAIN; | |
1959 | ||
1960 | /* Already on it! */ | |
1961 | if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST)) | |
1962 | return 0; | |
1963 | ||
1964 | /* A service that will be restarted must be stopped first to | |
1965 | * trigger BindsTo and/or OnFailure dependencies. If a user | |
1966 | * does not want to wait for the holdoff time to elapse, the | |
1967 | * service should be manually restarted, not started. We | |
1968 | * simply return EAGAIN here, so that any start jobs stay | |
1969 | * queued, and assume that the auto restart timer will | |
1970 | * eventually trigger the restart. */ | |
1971 | if (s->state == SERVICE_AUTO_RESTART) | |
1972 | return -EAGAIN; | |
1973 | ||
1974 | assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED)); | |
1975 | ||
1976 | /* Make sure we don't enter a busy loop of some kind. */ | |
1977 | r = service_start_limit_test(s); | |
1978 | if (r < 0) { | |
1979 | service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false); | |
1980 | return r; | |
1981 | } | |
1982 | ||
1983 | s->result = SERVICE_SUCCESS; | |
1984 | s->reload_result = SERVICE_SUCCESS; | |
1985 | s->main_pid_known = false; | |
1986 | s->main_pid_alien = false; | |
1987 | s->forbid_restart = false; | |
1988 | s->reset_cpu_usage = true; | |
1989 | ||
1990 | s->status_text = mfree(s->status_text); | |
1991 | s->status_errno = 0; | |
1992 | ||
1993 | s->notify_state = NOTIFY_UNKNOWN; | |
1994 | ||
1995 | service_enter_start_pre(s); | |
1996 | return 1; | |
1997 | } | |
1998 | ||
1999 | static int service_stop(Unit *u) { | |
2000 | Service *s = SERVICE(u); | |
2001 | ||
2002 | assert(s); | |
2003 | ||
2004 | /* Don't create restart jobs from manual stops. */ | |
2005 | s->forbid_restart = true; | |
2006 | ||
2007 | /* Already on it */ | |
2008 | if (IN_SET(s->state, | |
2009 | SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
2010 | SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) | |
2011 | return 0; | |
2012 | ||
2013 | /* A restart will be scheduled or is in progress. */ | |
2014 | if (s->state == SERVICE_AUTO_RESTART) { | |
2015 | service_set_state(s, SERVICE_DEAD); | |
2016 | return 0; | |
2017 | } | |
2018 | ||
2019 | /* If there's already something running we go directly into | |
2020 | * kill mode. */ | |
2021 | if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) { | |
2022 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS); | |
2023 | return 0; | |
2024 | } | |
2025 | ||
2026 | assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED)); | |
2027 | ||
2028 | service_enter_stop(s, SERVICE_SUCCESS); | |
2029 | return 1; | |
2030 | } | |
2031 | ||
2032 | static int service_reload(Unit *u) { | |
2033 | Service *s = SERVICE(u); | |
2034 | ||
2035 | assert(s); | |
2036 | ||
2037 | assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED); | |
2038 | ||
2039 | service_enter_reload(s); | |
2040 | return 1; | |
2041 | } | |
2042 | ||
2043 | _pure_ static bool service_can_reload(Unit *u) { | |
2044 | Service *s = SERVICE(u); | |
2045 | ||
2046 | assert(s); | |
2047 | ||
2048 | return !!s->exec_command[SERVICE_EXEC_RELOAD]; | |
2049 | } | |
2050 | ||
2051 | static int service_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2052 | Service *s = SERVICE(u); | |
2053 | ServiceFDStore *fs; | |
2054 | int r; | |
2055 | ||
2056 | assert(u); | |
2057 | assert(f); | |
2058 | assert(fds); | |
2059 | ||
2060 | unit_serialize_item(u, f, "state", service_state_to_string(s->state)); | |
2061 | unit_serialize_item(u, f, "result", service_result_to_string(s->result)); | |
2062 | unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result)); | |
2063 | ||
2064 | if (s->control_pid > 0) | |
2065 | unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid); | |
2066 | ||
2067 | if (s->main_pid_known && s->main_pid > 0) | |
2068 | unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid); | |
2069 | ||
2070 | unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known)); | |
2071 | unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good)); | |
2072 | ||
2073 | r = unit_serialize_item_escaped(u, f, "status-text", s->status_text); | |
2074 | if (r < 0) | |
2075 | return r; | |
2076 | ||
2077 | /* FIXME: There's a minor uncleanliness here: if there are | |
2078 | * multiple commands attached here, we will start from the | |
2079 | * first one again */ | |
2080 | if (s->control_command_id >= 0) | |
2081 | unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id)); | |
2082 | ||
2083 | r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd); | |
2084 | if (r < 0) | |
2085 | return r; | |
2086 | r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd); | |
2087 | if (r < 0) | |
2088 | return r; | |
2089 | r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd); | |
2090 | if (r < 0) | |
2091 | return r; | |
2092 | ||
2093 | r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd); | |
2094 | if (r < 0) | |
2095 | return r; | |
2096 | r = unit_serialize_item_fd(u, f, fds, "endpoint-fd", s->bus_endpoint_fd); | |
2097 | if (r < 0) | |
2098 | return r; | |
2099 | ||
2100 | LIST_FOREACH(fd_store, fs, s->fd_store) { | |
2101 | _cleanup_free_ char *c = NULL; | |
2102 | int copy; | |
2103 | ||
2104 | copy = fdset_put_dup(fds, fs->fd); | |
2105 | if (copy < 0) | |
2106 | return copy; | |
2107 | ||
2108 | c = cescape(fs->fdname); | |
2109 | ||
2110 | unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c)); | |
2111 | } | |
2112 | ||
2113 | if (s->main_exec_status.pid > 0) { | |
2114 | unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid); | |
2115 | dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp); | |
2116 | dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp); | |
2117 | ||
2118 | if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) { | |
2119 | unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code); | |
2120 | unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status); | |
2121 | } | |
2122 | } | |
2123 | ||
2124 | if (dual_timestamp_is_set(&s->watchdog_timestamp)) | |
2125 | dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp); | |
2126 | ||
2127 | unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart)); | |
2128 | ||
2129 | return 0; | |
2130 | } | |
2131 | ||
2132 | static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
2133 | Service *s = SERVICE(u); | |
2134 | int r; | |
2135 | ||
2136 | assert(u); | |
2137 | assert(key); | |
2138 | assert(value); | |
2139 | assert(fds); | |
2140 | ||
2141 | if (streq(key, "state")) { | |
2142 | ServiceState state; | |
2143 | ||
2144 | state = service_state_from_string(value); | |
2145 | if (state < 0) | |
2146 | log_unit_debug(u, "Failed to parse state value: %s", value); | |
2147 | else | |
2148 | s->deserialized_state = state; | |
2149 | } else if (streq(key, "result")) { | |
2150 | ServiceResult f; | |
2151 | ||
2152 | f = service_result_from_string(value); | |
2153 | if (f < 0) | |
2154 | log_unit_debug(u, "Failed to parse result value: %s", value); | |
2155 | else if (f != SERVICE_SUCCESS) | |
2156 | s->result = f; | |
2157 | ||
2158 | } else if (streq(key, "reload-result")) { | |
2159 | ServiceResult f; | |
2160 | ||
2161 | f = service_result_from_string(value); | |
2162 | if (f < 0) | |
2163 | log_unit_debug(u, "Failed to parse reload result value: %s", value); | |
2164 | else if (f != SERVICE_SUCCESS) | |
2165 | s->reload_result = f; | |
2166 | ||
2167 | } else if (streq(key, "control-pid")) { | |
2168 | pid_t pid; | |
2169 | ||
2170 | if (parse_pid(value, &pid) < 0) | |
2171 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); | |
2172 | else | |
2173 | s->control_pid = pid; | |
2174 | } else if (streq(key, "main-pid")) { | |
2175 | pid_t pid; | |
2176 | ||
2177 | if (parse_pid(value, &pid) < 0) | |
2178 | log_unit_debug(u, "Failed to parse main-pid value: %s", value); | |
2179 | else { | |
2180 | service_set_main_pid(s, pid); | |
2181 | unit_watch_pid(UNIT(s), pid); | |
2182 | } | |
2183 | } else if (streq(key, "main-pid-known")) { | |
2184 | int b; | |
2185 | ||
2186 | b = parse_boolean(value); | |
2187 | if (b < 0) | |
2188 | log_unit_debug(u, "Failed to parse main-pid-known value: %s", value); | |
2189 | else | |
2190 | s->main_pid_known = b; | |
2191 | } else if (streq(key, "bus-name-good")) { | |
2192 | int b; | |
2193 | ||
2194 | b = parse_boolean(value); | |
2195 | if (b < 0) | |
2196 | log_unit_debug(u, "Failed to parse bus-name-good value: %s", value); | |
2197 | else | |
2198 | s->bus_name_good = b; | |
2199 | } else if (streq(key, "status-text")) { | |
2200 | char *t; | |
2201 | ||
2202 | r = cunescape(value, 0, &t); | |
2203 | if (r < 0) | |
2204 | log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value); | |
2205 | else { | |
2206 | free(s->status_text); | |
2207 | s->status_text = t; | |
2208 | } | |
2209 | ||
2210 | } else if (streq(key, "control-command")) { | |
2211 | ServiceExecCommand id; | |
2212 | ||
2213 | id = service_exec_command_from_string(value); | |
2214 | if (id < 0) | |
2215 | log_unit_debug(u, "Failed to parse exec-command value: %s", value); | |
2216 | else { | |
2217 | s->control_command_id = id; | |
2218 | s->control_command = s->exec_command[id]; | |
2219 | } | |
2220 | } else if (streq(key, "socket-fd")) { | |
2221 | int fd; | |
2222 | ||
2223 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2224 | log_unit_debug(u, "Failed to parse socket-fd value: %s", value); | |
2225 | else { | |
2226 | asynchronous_close(s->socket_fd); | |
2227 | s->socket_fd = fdset_remove(fds, fd); | |
2228 | } | |
2229 | } else if (streq(key, "endpoint-fd")) { | |
2230 | int fd; | |
2231 | ||
2232 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2233 | log_unit_debug(u, "Failed to parse endpoint-fd value: %s", value); | |
2234 | else { | |
2235 | safe_close(s->bus_endpoint_fd); | |
2236 | s->bus_endpoint_fd = fdset_remove(fds, fd); | |
2237 | } | |
2238 | } else if (streq(key, "fd-store-fd")) { | |
2239 | const char *fdv; | |
2240 | size_t pf; | |
2241 | int fd; | |
2242 | ||
2243 | pf = strcspn(value, WHITESPACE); | |
2244 | fdv = strndupa(value, pf); | |
2245 | ||
2246 | if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2247 | log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value); | |
2248 | else { | |
2249 | _cleanup_free_ char *t = NULL; | |
2250 | const char *fdn; | |
2251 | ||
2252 | fdn = value + pf; | |
2253 | fdn += strspn(fdn, WHITESPACE); | |
2254 | (void) cunescape(fdn, 0, &t); | |
2255 | ||
2256 | r = service_add_fd_store(s, fd, t); | |
2257 | if (r < 0) | |
2258 | log_unit_error_errno(u, r, "Failed to add fd to store: %m"); | |
2259 | else if (r > 0) | |
2260 | fdset_remove(fds, fd); | |
2261 | } | |
2262 | ||
2263 | } else if (streq(key, "main-exec-status-pid")) { | |
2264 | pid_t pid; | |
2265 | ||
2266 | if (parse_pid(value, &pid) < 0) | |
2267 | log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value); | |
2268 | else | |
2269 | s->main_exec_status.pid = pid; | |
2270 | } else if (streq(key, "main-exec-status-code")) { | |
2271 | int i; | |
2272 | ||
2273 | if (safe_atoi(value, &i) < 0) | |
2274 | log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value); | |
2275 | else | |
2276 | s->main_exec_status.code = i; | |
2277 | } else if (streq(key, "main-exec-status-status")) { | |
2278 | int i; | |
2279 | ||
2280 | if (safe_atoi(value, &i) < 0) | |
2281 | log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value); | |
2282 | else | |
2283 | s->main_exec_status.status = i; | |
2284 | } else if (streq(key, "main-exec-status-start")) | |
2285 | dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp); | |
2286 | else if (streq(key, "main-exec-status-exit")) | |
2287 | dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp); | |
2288 | else if (streq(key, "watchdog-timestamp")) | |
2289 | dual_timestamp_deserialize(value, &s->watchdog_timestamp); | |
2290 | else if (streq(key, "forbid-restart")) { | |
2291 | int b; | |
2292 | ||
2293 | b = parse_boolean(value); | |
2294 | if (b < 0) | |
2295 | log_unit_debug(u, "Failed to parse forbid-restart value: %s", value); | |
2296 | else | |
2297 | s->forbid_restart = b; | |
2298 | } else if (streq(key, "stdin-fd")) { | |
2299 | int fd; | |
2300 | ||
2301 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2302 | log_unit_debug(u, "Failed to parse stdin-fd value: %s", value); | |
2303 | else { | |
2304 | asynchronous_close(s->stdin_fd); | |
2305 | s->stdin_fd = fdset_remove(fds, fd); | |
2306 | } | |
2307 | } else if (streq(key, "stdout-fd")) { | |
2308 | int fd; | |
2309 | ||
2310 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2311 | log_unit_debug(u, "Failed to parse stdout-fd value: %s", value); | |
2312 | else { | |
2313 | asynchronous_close(s->stdout_fd); | |
2314 | s->stdout_fd = fdset_remove(fds, fd); | |
2315 | } | |
2316 | } else if (streq(key, "stderr-fd")) { | |
2317 | int fd; | |
2318 | ||
2319 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2320 | log_unit_debug(u, "Failed to parse stderr-fd value: %s", value); | |
2321 | else { | |
2322 | asynchronous_close(s->stderr_fd); | |
2323 | s->stderr_fd = fdset_remove(fds, fd); | |
2324 | } | |
2325 | } else | |
2326 | log_unit_debug(u, "Unknown serialization key: %s", key); | |
2327 | ||
2328 | return 0; | |
2329 | } | |
2330 | ||
2331 | _pure_ static UnitActiveState service_active_state(Unit *u) { | |
2332 | const UnitActiveState *table; | |
2333 | ||
2334 | assert(u); | |
2335 | ||
2336 | table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table; | |
2337 | ||
2338 | return table[SERVICE(u)->state]; | |
2339 | } | |
2340 | ||
2341 | static const char *service_sub_state_to_string(Unit *u) { | |
2342 | assert(u); | |
2343 | ||
2344 | return service_state_to_string(SERVICE(u)->state); | |
2345 | } | |
2346 | ||
2347 | static bool service_check_gc(Unit *u) { | |
2348 | Service *s = SERVICE(u); | |
2349 | ||
2350 | assert(s); | |
2351 | ||
2352 | /* Never clean up services that still have a process around, | |
2353 | * even if the service is formally dead. */ | |
2354 | if (cgroup_good(s) > 0 || | |
2355 | main_pid_good(s) > 0 || | |
2356 | control_pid_good(s) > 0) | |
2357 | return true; | |
2358 | ||
2359 | return false; | |
2360 | } | |
2361 | ||
2362 | _pure_ static bool service_check_snapshot(Unit *u) { | |
2363 | Service *s = SERVICE(u); | |
2364 | ||
2365 | assert(s); | |
2366 | ||
2367 | return s->socket_fd < 0; | |
2368 | } | |
2369 | ||
2370 | static int service_retry_pid_file(Service *s) { | |
2371 | int r; | |
2372 | ||
2373 | assert(s->pid_file); | |
2374 | assert(s->state == SERVICE_START || s->state == SERVICE_START_POST); | |
2375 | ||
2376 | r = service_load_pid_file(s, false); | |
2377 | if (r < 0) | |
2378 | return r; | |
2379 | ||
2380 | service_unwatch_pid_file(s); | |
2381 | ||
2382 | service_enter_running(s, SERVICE_SUCCESS); | |
2383 | return 0; | |
2384 | } | |
2385 | ||
2386 | static int service_watch_pid_file(Service *s) { | |
2387 | int r; | |
2388 | ||
2389 | log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path); | |
2390 | ||
2391 | r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io); | |
2392 | if (r < 0) | |
2393 | goto fail; | |
2394 | ||
2395 | /* the pidfile might have appeared just before we set the watch */ | |
2396 | log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path); | |
2397 | service_retry_pid_file(s); | |
2398 | ||
2399 | return 0; | |
2400 | fail: | |
2401 | log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path); | |
2402 | service_unwatch_pid_file(s); | |
2403 | return r; | |
2404 | } | |
2405 | ||
2406 | static int service_demand_pid_file(Service *s) { | |
2407 | PathSpec *ps; | |
2408 | ||
2409 | assert(s->pid_file); | |
2410 | assert(!s->pid_file_pathspec); | |
2411 | ||
2412 | ps = new0(PathSpec, 1); | |
2413 | if (!ps) | |
2414 | return -ENOMEM; | |
2415 | ||
2416 | ps->unit = UNIT(s); | |
2417 | ps->path = strdup(s->pid_file); | |
2418 | if (!ps->path) { | |
2419 | free(ps); | |
2420 | return -ENOMEM; | |
2421 | } | |
2422 | ||
2423 | path_kill_slashes(ps->path); | |
2424 | ||
2425 | /* PATH_CHANGED would not be enough. There are daemons (sendmail) that | |
2426 | * keep their PID file open all the time. */ | |
2427 | ps->type = PATH_MODIFIED; | |
2428 | ps->inotify_fd = -1; | |
2429 | ||
2430 | s->pid_file_pathspec = ps; | |
2431 | ||
2432 | return service_watch_pid_file(s); | |
2433 | } | |
2434 | ||
2435 | static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) { | |
2436 | PathSpec *p = userdata; | |
2437 | Service *s; | |
2438 | ||
2439 | assert(p); | |
2440 | ||
2441 | s = SERVICE(p->unit); | |
2442 | ||
2443 | assert(s); | |
2444 | assert(fd >= 0); | |
2445 | assert(s->state == SERVICE_START || s->state == SERVICE_START_POST); | |
2446 | assert(s->pid_file_pathspec); | |
2447 | assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd)); | |
2448 | ||
2449 | log_unit_debug(UNIT(s), "inotify event"); | |
2450 | ||
2451 | if (path_spec_fd_event(p, events) < 0) | |
2452 | goto fail; | |
2453 | ||
2454 | if (service_retry_pid_file(s) == 0) | |
2455 | return 0; | |
2456 | ||
2457 | if (service_watch_pid_file(s) < 0) | |
2458 | goto fail; | |
2459 | ||
2460 | return 0; | |
2461 | ||
2462 | fail: | |
2463 | service_unwatch_pid_file(s); | |
2464 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
2465 | return 0; | |
2466 | } | |
2467 | ||
2468 | static void service_notify_cgroup_empty_event(Unit *u) { | |
2469 | Service *s = SERVICE(u); | |
2470 | ||
2471 | assert(u); | |
2472 | ||
2473 | log_unit_debug(u, "cgroup is empty"); | |
2474 | ||
2475 | switch (s->state) { | |
2476 | ||
2477 | /* Waiting for SIGCHLD is usually more interesting, | |
2478 | * because it includes return codes/signals. Which is | |
2479 | * why we ignore the cgroup events for most cases, | |
2480 | * except when we don't know pid which to expect the | |
2481 | * SIGCHLD for. */ | |
2482 | ||
2483 | case SERVICE_START: | |
2484 | case SERVICE_START_POST: | |
2485 | /* If we were hoping for the daemon to write its PID file, | |
2486 | * we can give up now. */ | |
2487 | if (s->pid_file_pathspec) { | |
2488 | log_unit_warning(u, "Daemon never wrote its PID file. Failing."); | |
2489 | ||
2490 | service_unwatch_pid_file(s); | |
2491 | if (s->state == SERVICE_START) | |
2492 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
2493 | else | |
2494 | service_enter_stop(s, SERVICE_FAILURE_RESOURCES); | |
2495 | } | |
2496 | break; | |
2497 | ||
2498 | case SERVICE_RUNNING: | |
2499 | /* service_enter_running() will figure out what to do */ | |
2500 | service_enter_running(s, SERVICE_SUCCESS); | |
2501 | break; | |
2502 | ||
2503 | case SERVICE_STOP_SIGABRT: | |
2504 | case SERVICE_STOP_SIGTERM: | |
2505 | case SERVICE_STOP_SIGKILL: | |
2506 | ||
2507 | if (main_pid_good(s) <= 0 && !control_pid_good(s)) | |
2508 | service_enter_stop_post(s, SERVICE_SUCCESS); | |
2509 | ||
2510 | break; | |
2511 | ||
2512 | case SERVICE_STOP_POST: | |
2513 | case SERVICE_FINAL_SIGTERM: | |
2514 | case SERVICE_FINAL_SIGKILL: | |
2515 | if (main_pid_good(s) <= 0 && !control_pid_good(s)) | |
2516 | service_enter_dead(s, SERVICE_SUCCESS, true); | |
2517 | ||
2518 | break; | |
2519 | ||
2520 | default: | |
2521 | ; | |
2522 | } | |
2523 | } | |
2524 | ||
2525 | static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { | |
2526 | Service *s = SERVICE(u); | |
2527 | ServiceResult f; | |
2528 | ||
2529 | assert(s); | |
2530 | assert(pid >= 0); | |
2531 | ||
2532 | if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) : | |
2533 | is_clean_exit_lsb(code, status, &s->success_status)) | |
2534 | f = SERVICE_SUCCESS; | |
2535 | else if (code == CLD_EXITED) | |
2536 | f = SERVICE_FAILURE_EXIT_CODE; | |
2537 | else if (code == CLD_KILLED) | |
2538 | f = SERVICE_FAILURE_SIGNAL; | |
2539 | else if (code == CLD_DUMPED) | |
2540 | f = SERVICE_FAILURE_CORE_DUMP; | |
2541 | else | |
2542 | assert_not_reached("Unknown code"); | |
2543 | ||
2544 | if (s->main_pid == pid) { | |
2545 | /* Forking services may occasionally move to a new PID. | |
2546 | * As long as they update the PID file before exiting the old | |
2547 | * PID, they're fine. */ | |
2548 | if (service_load_pid_file(s, false) == 0) | |
2549 | return; | |
2550 | ||
2551 | s->main_pid = 0; | |
2552 | exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status); | |
2553 | ||
2554 | if (s->main_command) { | |
2555 | /* If this is not a forking service than the | |
2556 | * main process got started and hence we copy | |
2557 | * the exit status so that it is recorded both | |
2558 | * as main and as control process exit | |
2559 | * status */ | |
2560 | ||
2561 | s->main_command->exec_status = s->main_exec_status; | |
2562 | ||
2563 | if (s->main_command->ignore) | |
2564 | f = SERVICE_SUCCESS; | |
2565 | } else if (s->exec_command[SERVICE_EXEC_START]) { | |
2566 | ||
2567 | /* If this is a forked process, then we should | |
2568 | * ignore the return value if this was | |
2569 | * configured for the starter process */ | |
2570 | ||
2571 | if (s->exec_command[SERVICE_EXEC_START]->ignore) | |
2572 | f = SERVICE_SUCCESS; | |
2573 | } | |
2574 | ||
2575 | log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, | |
2576 | LOG_UNIT_ID(u), | |
2577 | LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s", | |
2578 | sigchld_code_to_string(code), status, | |
2579 | strna(code == CLD_EXITED | |
2580 | ? exit_status_to_string(status, EXIT_STATUS_FULL) | |
2581 | : signal_to_string(status))), | |
2582 | "EXIT_CODE=%s", sigchld_code_to_string(code), | |
2583 | "EXIT_STATUS=%i", status, | |
2584 | NULL); | |
2585 | ||
2586 | if (f != SERVICE_SUCCESS) | |
2587 | s->result = f; | |
2588 | ||
2589 | if (s->main_command && | |
2590 | s->main_command->command_next && | |
2591 | f == SERVICE_SUCCESS) { | |
2592 | ||
2593 | /* There is another command to * | |
2594 | * execute, so let's do that. */ | |
2595 | ||
2596 | log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state)); | |
2597 | service_run_next_main(s); | |
2598 | ||
2599 | } else { | |
2600 | ||
2601 | /* The service exited, so the service is officially | |
2602 | * gone. */ | |
2603 | s->main_command = NULL; | |
2604 | ||
2605 | switch (s->state) { | |
2606 | ||
2607 | case SERVICE_START_POST: | |
2608 | case SERVICE_RELOAD: | |
2609 | case SERVICE_STOP: | |
2610 | /* Need to wait until the operation is | |
2611 | * done */ | |
2612 | break; | |
2613 | ||
2614 | case SERVICE_START: | |
2615 | if (s->type == SERVICE_ONESHOT) { | |
2616 | /* This was our main goal, so let's go on */ | |
2617 | if (f == SERVICE_SUCCESS) | |
2618 | service_enter_start_post(s); | |
2619 | else | |
2620 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, f); | |
2621 | break; | |
2622 | } | |
2623 | ||
2624 | /* Fall through */ | |
2625 | ||
2626 | case SERVICE_RUNNING: | |
2627 | service_enter_running(s, f); | |
2628 | break; | |
2629 | ||
2630 | case SERVICE_STOP_SIGABRT: | |
2631 | case SERVICE_STOP_SIGTERM: | |
2632 | case SERVICE_STOP_SIGKILL: | |
2633 | ||
2634 | if (!control_pid_good(s)) | |
2635 | service_enter_stop_post(s, f); | |
2636 | ||
2637 | /* If there is still a control process, wait for that first */ | |
2638 | break; | |
2639 | ||
2640 | case SERVICE_STOP_POST: | |
2641 | case SERVICE_FINAL_SIGTERM: | |
2642 | case SERVICE_FINAL_SIGKILL: | |
2643 | ||
2644 | if (!control_pid_good(s)) | |
2645 | service_enter_dead(s, f, true); | |
2646 | break; | |
2647 | ||
2648 | default: | |
2649 | assert_not_reached("Uh, main process died at wrong time."); | |
2650 | } | |
2651 | } | |
2652 | ||
2653 | } else if (s->control_pid == pid) { | |
2654 | s->control_pid = 0; | |
2655 | ||
2656 | if (s->control_command) { | |
2657 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); | |
2658 | ||
2659 | if (s->control_command->ignore) | |
2660 | f = SERVICE_SUCCESS; | |
2661 | } | |
2662 | ||
2663 | log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0, | |
2664 | "Control process exited, code=%s status=%i", | |
2665 | sigchld_code_to_string(code), status); | |
2666 | ||
2667 | if (f != SERVICE_SUCCESS) | |
2668 | s->result = f; | |
2669 | ||
2670 | /* Immediately get rid of the cgroup, so that the | |
2671 | * kernel doesn't delay the cgroup empty messages for | |
2672 | * the service cgroup any longer than necessary */ | |
2673 | service_kill_control_processes(s); | |
2674 | ||
2675 | if (s->control_command && | |
2676 | s->control_command->command_next && | |
2677 | f == SERVICE_SUCCESS) { | |
2678 | ||
2679 | /* There is another command to * | |
2680 | * execute, so let's do that. */ | |
2681 | ||
2682 | log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state)); | |
2683 | service_run_next_control(s); | |
2684 | ||
2685 | } else { | |
2686 | /* No further commands for this step, so let's | |
2687 | * figure out what to do next */ | |
2688 | ||
2689 | s->control_command = NULL; | |
2690 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
2691 | ||
2692 | log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state)); | |
2693 | ||
2694 | switch (s->state) { | |
2695 | ||
2696 | case SERVICE_START_PRE: | |
2697 | if (f == SERVICE_SUCCESS) | |
2698 | service_enter_start(s); | |
2699 | else | |
2700 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, f); | |
2701 | break; | |
2702 | ||
2703 | case SERVICE_START: | |
2704 | if (s->type != SERVICE_FORKING) | |
2705 | /* Maybe spurious event due to a reload that changed the type? */ | |
2706 | break; | |
2707 | ||
2708 | if (f != SERVICE_SUCCESS) { | |
2709 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, f); | |
2710 | break; | |
2711 | } | |
2712 | ||
2713 | if (s->pid_file) { | |
2714 | bool has_start_post; | |
2715 | int r; | |
2716 | ||
2717 | /* Let's try to load the pid file here if we can. | |
2718 | * The PID file might actually be created by a START_POST | |
2719 | * script. In that case don't worry if the loading fails. */ | |
2720 | ||
2721 | has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST]; | |
2722 | r = service_load_pid_file(s, !has_start_post); | |
2723 | if (!has_start_post && r < 0) { | |
2724 | r = service_demand_pid_file(s); | |
2725 | if (r < 0 || !cgroup_good(s)) | |
2726 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
2727 | break; | |
2728 | } | |
2729 | } else | |
2730 | (void) service_search_main_pid(s); | |
2731 | ||
2732 | service_enter_start_post(s); | |
2733 | break; | |
2734 | ||
2735 | case SERVICE_START_POST: | |
2736 | if (f != SERVICE_SUCCESS) { | |
2737 | service_enter_stop(s, f); | |
2738 | break; | |
2739 | } | |
2740 | ||
2741 | if (s->pid_file) { | |
2742 | int r; | |
2743 | ||
2744 | r = service_load_pid_file(s, true); | |
2745 | if (r < 0) { | |
2746 | r = service_demand_pid_file(s); | |
2747 | if (r < 0 || !cgroup_good(s)) | |
2748 | service_enter_stop(s, SERVICE_FAILURE_RESOURCES); | |
2749 | break; | |
2750 | } | |
2751 | } else | |
2752 | (void) service_search_main_pid(s); | |
2753 | ||
2754 | service_enter_running(s, SERVICE_SUCCESS); | |
2755 | break; | |
2756 | ||
2757 | case SERVICE_RELOAD: | |
2758 | if (f == SERVICE_SUCCESS) { | |
2759 | service_load_pid_file(s, true); | |
2760 | (void) service_search_main_pid(s); | |
2761 | } | |
2762 | ||
2763 | s->reload_result = f; | |
2764 | service_enter_running(s, SERVICE_SUCCESS); | |
2765 | break; | |
2766 | ||
2767 | case SERVICE_STOP: | |
2768 | service_enter_signal(s, SERVICE_STOP_SIGTERM, f); | |
2769 | break; | |
2770 | ||
2771 | case SERVICE_STOP_SIGABRT: | |
2772 | case SERVICE_STOP_SIGTERM: | |
2773 | case SERVICE_STOP_SIGKILL: | |
2774 | if (main_pid_good(s) <= 0) | |
2775 | service_enter_stop_post(s, f); | |
2776 | ||
2777 | /* If there is still a service | |
2778 | * process around, wait until | |
2779 | * that one quit, too */ | |
2780 | break; | |
2781 | ||
2782 | case SERVICE_STOP_POST: | |
2783 | case SERVICE_FINAL_SIGTERM: | |
2784 | case SERVICE_FINAL_SIGKILL: | |
2785 | if (main_pid_good(s) <= 0) | |
2786 | service_enter_dead(s, f, true); | |
2787 | break; | |
2788 | ||
2789 | default: | |
2790 | assert_not_reached("Uh, control process died at wrong time."); | |
2791 | } | |
2792 | } | |
2793 | } | |
2794 | ||
2795 | /* Notify clients about changed exit status */ | |
2796 | unit_add_to_dbus_queue(u); | |
2797 | ||
2798 | /* We got one SIGCHLD for the service, let's watch all | |
2799 | * processes that are now running of the service, and watch | |
2800 | * that. Among the PIDs we then watch will be children | |
2801 | * reassigned to us, which hopefully allows us to identify | |
2802 | * when all children are gone */ | |
2803 | unit_tidy_watch_pids(u, s->main_pid, s->control_pid); | |
2804 | unit_watch_all_pids(u); | |
2805 | ||
2806 | /* If the PID set is empty now, then let's finish this off */ | |
2807 | if (set_isempty(u->pids)) | |
2808 | service_notify_cgroup_empty_event(u); | |
2809 | } | |
2810 | ||
2811 | static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { | |
2812 | Service *s = SERVICE(userdata); | |
2813 | ||
2814 | assert(s); | |
2815 | assert(source == s->timer_event_source); | |
2816 | ||
2817 | switch (s->state) { | |
2818 | ||
2819 | case SERVICE_START_PRE: | |
2820 | case SERVICE_START: | |
2821 | log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre"); | |
2822 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT); | |
2823 | break; | |
2824 | ||
2825 | case SERVICE_START_POST: | |
2826 | log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping."); | |
2827 | service_enter_stop(s, SERVICE_FAILURE_TIMEOUT); | |
2828 | break; | |
2829 | ||
2830 | case SERVICE_RELOAD: | |
2831 | log_unit_warning(UNIT(s), "Reload operation timed out. Stopping."); | |
2832 | service_unwatch_control_pid(s); | |
2833 | service_kill_control_processes(s); | |
2834 | s->reload_result = SERVICE_FAILURE_TIMEOUT; | |
2835 | service_enter_running(s, SERVICE_SUCCESS); | |
2836 | break; | |
2837 | ||
2838 | case SERVICE_STOP: | |
2839 | log_unit_warning(UNIT(s), "Stopping timed out. Terminating."); | |
2840 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT); | |
2841 | break; | |
2842 | ||
2843 | case SERVICE_STOP_SIGABRT: | |
2844 | log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating."); | |
2845 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT); | |
2846 | break; | |
2847 | ||
2848 | case SERVICE_STOP_SIGTERM: | |
2849 | if (s->kill_context.send_sigkill) { | |
2850 | log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing."); | |
2851 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT); | |
2852 | } else { | |
2853 | log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL."); | |
2854 | service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT); | |
2855 | } | |
2856 | ||
2857 | break; | |
2858 | ||
2859 | case SERVICE_STOP_SIGKILL: | |
2860 | /* Uh, we sent a SIGKILL and it is still not gone? | |
2861 | * Must be something we cannot kill, so let's just be | |
2862 | * weirded out and continue */ | |
2863 | ||
2864 | log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring."); | |
2865 | service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT); | |
2866 | break; | |
2867 | ||
2868 | case SERVICE_STOP_POST: | |
2869 | log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating."); | |
2870 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT); | |
2871 | break; | |
2872 | ||
2873 | case SERVICE_FINAL_SIGTERM: | |
2874 | if (s->kill_context.send_sigkill) { | |
2875 | log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing."); | |
2876 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT); | |
2877 | } else { | |
2878 | log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode."); | |
2879 | service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false); | |
2880 | } | |
2881 | ||
2882 | break; | |
2883 | ||
2884 | case SERVICE_FINAL_SIGKILL: | |
2885 | log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode."); | |
2886 | service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true); | |
2887 | break; | |
2888 | ||
2889 | case SERVICE_AUTO_RESTART: | |
2890 | log_unit_info(UNIT(s), | |
2891 | s->restart_usec > 0 ? | |
2892 | "Service hold-off time over, scheduling restart." : | |
2893 | "Service has no hold-off time, scheduling restart."); | |
2894 | service_enter_restart(s); | |
2895 | break; | |
2896 | ||
2897 | default: | |
2898 | assert_not_reached("Timeout at wrong time."); | |
2899 | } | |
2900 | ||
2901 | return 0; | |
2902 | } | |
2903 | ||
2904 | static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) { | |
2905 | Service *s = SERVICE(userdata); | |
2906 | char t[FORMAT_TIMESPAN_MAX]; | |
2907 | ||
2908 | assert(s); | |
2909 | assert(source == s->watchdog_event_source); | |
2910 | ||
2911 | log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!", | |
2912 | format_timespan(t, sizeof(t), s->watchdog_usec, 1)); | |
2913 | ||
2914 | service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG); | |
2915 | ||
2916 | return 0; | |
2917 | } | |
2918 | ||
2919 | static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) { | |
2920 | Service *s = SERVICE(u); | |
2921 | _cleanup_free_ char *cc = NULL; | |
2922 | bool notify_dbus = false; | |
2923 | const char *e; | |
2924 | ||
2925 | assert(u); | |
2926 | ||
2927 | cc = strv_join(tags, ", "); | |
2928 | ||
2929 | if (s->notify_access == NOTIFY_NONE) { | |
2930 | log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid); | |
2931 | return; | |
2932 | } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) { | |
2933 | if (s->main_pid != 0) | |
2934 | log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid); | |
2935 | else | |
2936 | log_unit_debug(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid); | |
2937 | return; | |
2938 | } else | |
2939 | log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc); | |
2940 | ||
2941 | /* Interpret MAINPID= */ | |
2942 | e = strv_find_startswith(tags, "MAINPID="); | |
2943 | if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) { | |
2944 | if (parse_pid(e, &pid) < 0) | |
2945 | log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e); | |
2946 | else { | |
2947 | service_set_main_pid(s, pid); | |
2948 | unit_watch_pid(UNIT(s), pid); | |
2949 | notify_dbus = true; | |
2950 | } | |
2951 | } | |
2952 | ||
2953 | /* Interpret RELOADING= */ | |
2954 | if (strv_find(tags, "RELOADING=1")) { | |
2955 | ||
2956 | s->notify_state = NOTIFY_RELOADING; | |
2957 | ||
2958 | if (s->state == SERVICE_RUNNING) | |
2959 | service_enter_reload_by_notify(s); | |
2960 | ||
2961 | notify_dbus = true; | |
2962 | } | |
2963 | ||
2964 | /* Interpret READY= */ | |
2965 | if (strv_find(tags, "READY=1")) { | |
2966 | ||
2967 | s->notify_state = NOTIFY_READY; | |
2968 | ||
2969 | /* Type=notify services inform us about completed | |
2970 | * initialization with READY=1 */ | |
2971 | if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START) | |
2972 | service_enter_start_post(s); | |
2973 | ||
2974 | /* Sending READY=1 while we are reloading informs us | |
2975 | * that the reloading is complete */ | |
2976 | if (s->state == SERVICE_RELOAD && s->control_pid == 0) | |
2977 | service_enter_running(s, SERVICE_SUCCESS); | |
2978 | ||
2979 | notify_dbus = true; | |
2980 | } | |
2981 | ||
2982 | /* Interpret STOPPING= */ | |
2983 | if (strv_find(tags, "STOPPING=1")) { | |
2984 | ||
2985 | s->notify_state = NOTIFY_STOPPING; | |
2986 | ||
2987 | if (s->state == SERVICE_RUNNING) | |
2988 | service_enter_stop_by_notify(s); | |
2989 | ||
2990 | notify_dbus = true; | |
2991 | } | |
2992 | ||
2993 | /* Interpret STATUS= */ | |
2994 | e = strv_find_startswith(tags, "STATUS="); | |
2995 | if (e) { | |
2996 | _cleanup_free_ char *t = NULL; | |
2997 | ||
2998 | if (!isempty(e)) { | |
2999 | if (!utf8_is_valid(e)) | |
3000 | log_unit_warning(u, "Status message in notification message is not UTF-8 clean."); | |
3001 | else { | |
3002 | t = strdup(e); | |
3003 | if (!t) | |
3004 | log_oom(); | |
3005 | } | |
3006 | } | |
3007 | ||
3008 | if (!streq_ptr(s->status_text, t)) { | |
3009 | ||
3010 | free(s->status_text); | |
3011 | s->status_text = t; | |
3012 | t = NULL; | |
3013 | ||
3014 | notify_dbus = true; | |
3015 | } | |
3016 | } | |
3017 | ||
3018 | /* Interpret ERRNO= */ | |
3019 | e = strv_find_startswith(tags, "ERRNO="); | |
3020 | if (e) { | |
3021 | int status_errno; | |
3022 | ||
3023 | if (safe_atoi(e, &status_errno) < 0 || status_errno < 0) | |
3024 | log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e); | |
3025 | else { | |
3026 | if (s->status_errno != status_errno) { | |
3027 | s->status_errno = status_errno; | |
3028 | notify_dbus = true; | |
3029 | } | |
3030 | } | |
3031 | } | |
3032 | ||
3033 | /* Interpret WATCHDOG= */ | |
3034 | if (strv_find(tags, "WATCHDOG=1")) | |
3035 | service_reset_watchdog(s); | |
3036 | ||
3037 | if (strv_find(tags, "FDSTORE=1")) { | |
3038 | const char *name; | |
3039 | ||
3040 | name = strv_find_startswith(tags, "FDNAME="); | |
3041 | if (name && !fdname_is_valid(name)) { | |
3042 | log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring."); | |
3043 | name = NULL; | |
3044 | } | |
3045 | ||
3046 | service_add_fd_store_set(s, fds, name); | |
3047 | } | |
3048 | ||
3049 | /* Notify clients about changed status or main pid */ | |
3050 | if (notify_dbus) | |
3051 | unit_add_to_dbus_queue(u); | |
3052 | } | |
3053 | ||
3054 | static int service_get_timeout(Unit *u, uint64_t *timeout) { | |
3055 | Service *s = SERVICE(u); | |
3056 | int r; | |
3057 | ||
3058 | if (!s->timer_event_source) | |
3059 | return 0; | |
3060 | ||
3061 | r = sd_event_source_get_time(s->timer_event_source, timeout); | |
3062 | if (r < 0) | |
3063 | return r; | |
3064 | ||
3065 | return 1; | |
3066 | } | |
3067 | ||
3068 | static void service_bus_name_owner_change( | |
3069 | Unit *u, | |
3070 | const char *name, | |
3071 | const char *old_owner, | |
3072 | const char *new_owner) { | |
3073 | ||
3074 | Service *s = SERVICE(u); | |
3075 | int r; | |
3076 | ||
3077 | assert(s); | |
3078 | assert(name); | |
3079 | ||
3080 | assert(streq(s->bus_name, name)); | |
3081 | assert(old_owner || new_owner); | |
3082 | ||
3083 | if (old_owner && new_owner) | |
3084 | log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner); | |
3085 | else if (old_owner) | |
3086 | log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner); | |
3087 | else | |
3088 | log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner); | |
3089 | ||
3090 | s->bus_name_good = !!new_owner; | |
3091 | ||
3092 | if (s->type == SERVICE_DBUS) { | |
3093 | ||
3094 | /* service_enter_running() will figure out what to | |
3095 | * do */ | |
3096 | if (s->state == SERVICE_RUNNING) | |
3097 | service_enter_running(s, SERVICE_SUCCESS); | |
3098 | else if (s->state == SERVICE_START && new_owner) | |
3099 | service_enter_start_post(s); | |
3100 | ||
3101 | } else if (new_owner && | |
3102 | s->main_pid <= 0 && | |
3103 | (s->state == SERVICE_START || | |
3104 | s->state == SERVICE_START_POST || | |
3105 | s->state == SERVICE_RUNNING || | |
3106 | s->state == SERVICE_RELOAD)) { | |
3107 | ||
3108 | _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; | |
3109 | pid_t pid; | |
3110 | ||
3111 | /* Try to acquire PID from bus service */ | |
3112 | ||
3113 | r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds); | |
3114 | if (r >= 0) | |
3115 | r = sd_bus_creds_get_pid(creds, &pid); | |
3116 | if (r >= 0) { | |
3117 | log_unit_debug(u, "D-Bus name %s is now owned by process %u", name, (unsigned) pid); | |
3118 | ||
3119 | service_set_main_pid(s, pid); | |
3120 | unit_watch_pid(UNIT(s), pid); | |
3121 | } | |
3122 | } | |
3123 | } | |
3124 | ||
3125 | int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) { | |
3126 | _cleanup_free_ char *peer = NULL; | |
3127 | int r; | |
3128 | ||
3129 | assert(s); | |
3130 | assert(fd >= 0); | |
3131 | ||
3132 | /* This is called by the socket code when instantiating a new | |
3133 | * service for a stream socket and the socket needs to be | |
3134 | * configured. */ | |
3135 | ||
3136 | if (UNIT(s)->load_state != UNIT_LOADED) | |
3137 | return -EINVAL; | |
3138 | ||
3139 | if (s->socket_fd >= 0) | |
3140 | return -EBUSY; | |
3141 | ||
3142 | if (s->state != SERVICE_DEAD) | |
3143 | return -EAGAIN; | |
3144 | ||
3145 | if (getpeername_pretty(fd, &peer) >= 0) { | |
3146 | ||
3147 | if (UNIT(s)->description) { | |
3148 | _cleanup_free_ char *a; | |
3149 | ||
3150 | a = strjoin(UNIT(s)->description, " (", peer, ")", NULL); | |
3151 | if (!a) | |
3152 | return -ENOMEM; | |
3153 | ||
3154 | r = unit_set_description(UNIT(s), a); | |
3155 | } else | |
3156 | r = unit_set_description(UNIT(s), peer); | |
3157 | ||
3158 | if (r < 0) | |
3159 | return r; | |
3160 | } | |
3161 | ||
3162 | s->socket_fd = fd; | |
3163 | s->socket_fd_selinux_context_net = selinux_context_net; | |
3164 | ||
3165 | unit_ref_set(&s->accept_socket, UNIT(sock)); | |
3166 | ||
3167 | return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false); | |
3168 | } | |
3169 | ||
3170 | static void service_reset_failed(Unit *u) { | |
3171 | Service *s = SERVICE(u); | |
3172 | ||
3173 | assert(s); | |
3174 | ||
3175 | if (s->state == SERVICE_FAILED) | |
3176 | service_set_state(s, SERVICE_DEAD); | |
3177 | ||
3178 | s->result = SERVICE_SUCCESS; | |
3179 | s->reload_result = SERVICE_SUCCESS; | |
3180 | ||
3181 | RATELIMIT_RESET(s->start_limit); | |
3182 | } | |
3183 | ||
3184 | static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { | |
3185 | Service *s = SERVICE(u); | |
3186 | ||
3187 | return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error); | |
3188 | } | |
3189 | ||
3190 | static const char* const service_restart_table[_SERVICE_RESTART_MAX] = { | |
3191 | [SERVICE_RESTART_NO] = "no", | |
3192 | [SERVICE_RESTART_ON_SUCCESS] = "on-success", | |
3193 | [SERVICE_RESTART_ON_FAILURE] = "on-failure", | |
3194 | [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal", | |
3195 | [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog", | |
3196 | [SERVICE_RESTART_ON_ABORT] = "on-abort", | |
3197 | [SERVICE_RESTART_ALWAYS] = "always", | |
3198 | }; | |
3199 | ||
3200 | DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart); | |
3201 | ||
3202 | static const char* const service_type_table[_SERVICE_TYPE_MAX] = { | |
3203 | [SERVICE_SIMPLE] = "simple", | |
3204 | [SERVICE_FORKING] = "forking", | |
3205 | [SERVICE_ONESHOT] = "oneshot", | |
3206 | [SERVICE_DBUS] = "dbus", | |
3207 | [SERVICE_NOTIFY] = "notify", | |
3208 | [SERVICE_IDLE] = "idle" | |
3209 | }; | |
3210 | ||
3211 | DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType); | |
3212 | ||
3213 | static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = { | |
3214 | [SERVICE_EXEC_START_PRE] = "ExecStartPre", | |
3215 | [SERVICE_EXEC_START] = "ExecStart", | |
3216 | [SERVICE_EXEC_START_POST] = "ExecStartPost", | |
3217 | [SERVICE_EXEC_RELOAD] = "ExecReload", | |
3218 | [SERVICE_EXEC_STOP] = "ExecStop", | |
3219 | [SERVICE_EXEC_STOP_POST] = "ExecStopPost", | |
3220 | }; | |
3221 | ||
3222 | DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand); | |
3223 | ||
3224 | static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = { | |
3225 | [NOTIFY_NONE] = "none", | |
3226 | [NOTIFY_MAIN] = "main", | |
3227 | [NOTIFY_ALL] = "all" | |
3228 | }; | |
3229 | ||
3230 | DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess); | |
3231 | ||
3232 | static const char* const notify_state_table[_NOTIFY_STATE_MAX] = { | |
3233 | [NOTIFY_UNKNOWN] = "unknown", | |
3234 | [NOTIFY_READY] = "ready", | |
3235 | [NOTIFY_RELOADING] = "reloading", | |
3236 | [NOTIFY_STOPPING] = "stopping", | |
3237 | }; | |
3238 | ||
3239 | DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState); | |
3240 | ||
3241 | static const char* const service_result_table[_SERVICE_RESULT_MAX] = { | |
3242 | [SERVICE_SUCCESS] = "success", | |
3243 | [SERVICE_FAILURE_RESOURCES] = "resources", | |
3244 | [SERVICE_FAILURE_TIMEOUT] = "timeout", | |
3245 | [SERVICE_FAILURE_EXIT_CODE] = "exit-code", | |
3246 | [SERVICE_FAILURE_SIGNAL] = "signal", | |
3247 | [SERVICE_FAILURE_CORE_DUMP] = "core-dump", | |
3248 | [SERVICE_FAILURE_WATCHDOG] = "watchdog", | |
3249 | [SERVICE_FAILURE_START_LIMIT] = "start-limit" | |
3250 | }; | |
3251 | ||
3252 | DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult); | |
3253 | ||
3254 | const UnitVTable service_vtable = { | |
3255 | .object_size = sizeof(Service), | |
3256 | .exec_context_offset = offsetof(Service, exec_context), | |
3257 | .cgroup_context_offset = offsetof(Service, cgroup_context), | |
3258 | .kill_context_offset = offsetof(Service, kill_context), | |
3259 | .exec_runtime_offset = offsetof(Service, exec_runtime), | |
3260 | ||
3261 | .sections = | |
3262 | "Unit\0" | |
3263 | "Service\0" | |
3264 | "Install\0", | |
3265 | .private_section = "Service", | |
3266 | ||
3267 | .init = service_init, | |
3268 | .done = service_done, | |
3269 | .load = service_load, | |
3270 | .release_resources = service_release_resources, | |
3271 | ||
3272 | .coldplug = service_coldplug, | |
3273 | ||
3274 | .dump = service_dump, | |
3275 | ||
3276 | .start = service_start, | |
3277 | .stop = service_stop, | |
3278 | .reload = service_reload, | |
3279 | ||
3280 | .can_reload = service_can_reload, | |
3281 | ||
3282 | .kill = service_kill, | |
3283 | ||
3284 | .serialize = service_serialize, | |
3285 | .deserialize_item = service_deserialize_item, | |
3286 | ||
3287 | .active_state = service_active_state, | |
3288 | .sub_state_to_string = service_sub_state_to_string, | |
3289 | ||
3290 | .check_gc = service_check_gc, | |
3291 | .check_snapshot = service_check_snapshot, | |
3292 | ||
3293 | .sigchld_event = service_sigchld_event, | |
3294 | ||
3295 | .reset_failed = service_reset_failed, | |
3296 | ||
3297 | .notify_cgroup_empty = service_notify_cgroup_empty_event, | |
3298 | .notify_message = service_notify_message, | |
3299 | ||
3300 | .bus_name_owner_change = service_bus_name_owner_change, | |
3301 | ||
3302 | .bus_vtable = bus_service_vtable, | |
3303 | .bus_set_property = bus_service_set_property, | |
3304 | .bus_commit_properties = bus_service_commit_properties, | |
3305 | ||
3306 | .get_timeout = service_get_timeout, | |
3307 | .can_transient = true, | |
3308 | ||
3309 | .status_message_formats = { | |
3310 | .starting_stopping = { | |
3311 | [0] = "Starting %s...", | |
3312 | [1] = "Stopping %s...", | |
3313 | }, | |
3314 | .finished_start_job = { | |
3315 | [JOB_DONE] = "Started %s.", | |
3316 | [JOB_FAILED] = "Failed to start %s.", | |
3317 | }, | |
3318 | .finished_stop_job = { | |
3319 | [JOB_DONE] = "Stopped %s.", | |
3320 | [JOB_FAILED] = "Stopped (with error) %s.", | |
3321 | }, | |
3322 | }, | |
3323 | }; |