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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 <dirent.h>
25 #include <unistd.h>
26 #include <sys/reboot.h>
27
28 #include "manager.h"
29 #include "unit.h"
30 #include "service.h"
31 #include "load-fragment.h"
32 #include "load-dropin.h"
33 #include "log.h"
34 #include "strv.h"
35 #include "unit-name.h"
36 #include "unit-printf.h"
37 #include "dbus-service.h"
38 #include "special.h"
39 #include "exit-status.h"
40 #include "def.h"
41 #include "path-util.h"
42 #include "util.h"
43 #include "utf8.h"
44 #include "env-util.h"
45 #include "fileio.h"
46 #include "bus-error.h"
47 #include "bus-util.h"
48
49 #ifdef HAVE_SYSV_COMPAT
50
51 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
52
53 typedef enum RunlevelType {
54 RUNLEVEL_UP,
55 RUNLEVEL_DOWN
56 } RunlevelType;
57
58 static const struct {
59 const char *path;
60 const char *target;
61 const RunlevelType type;
62 } rcnd_table[] = {
63 /* Standard SysV runlevels for start-up */
64 { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP },
65 { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
66 { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
67 { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
68 { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
69
70 /* Standard SysV runlevels for shutdown */
71 { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN },
72 { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }
73
74 /* Note that the order here matters, as we read the
75 directories in this order, and we want to make sure that
76 sysv_start_priority is known when we first load the
77 unit. And that value we only know from S links. Hence
78 UP must be read before DOWN */
79 };
80
81 #define RUNLEVELS_UP "12345"
82 #endif
83
84 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
85 [SERVICE_DEAD] = UNIT_INACTIVE,
86 [SERVICE_START_PRE] = UNIT_ACTIVATING,
87 [SERVICE_START] = UNIT_ACTIVATING,
88 [SERVICE_START_POST] = UNIT_ACTIVATING,
89 [SERVICE_RUNNING] = UNIT_ACTIVE,
90 [SERVICE_EXITED] = UNIT_ACTIVE,
91 [SERVICE_RELOAD] = UNIT_RELOADING,
92 [SERVICE_STOP] = UNIT_DEACTIVATING,
93 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
94 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
95 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
96 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
97 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
98 [SERVICE_FAILED] = UNIT_FAILED,
99 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
100 };
101
102 /* For Type=idle we never want to delay any other jobs, hence we
103 * consider idle jobs active as soon as we start working on them */
104 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
105 [SERVICE_DEAD] = UNIT_INACTIVE,
106 [SERVICE_START_PRE] = UNIT_ACTIVE,
107 [SERVICE_START] = UNIT_ACTIVE,
108 [SERVICE_START_POST] = UNIT_ACTIVE,
109 [SERVICE_RUNNING] = UNIT_ACTIVE,
110 [SERVICE_EXITED] = UNIT_ACTIVE,
111 [SERVICE_RELOAD] = UNIT_RELOADING,
112 [SERVICE_STOP] = UNIT_DEACTIVATING,
113 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
114 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
115 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
116 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
117 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
118 [SERVICE_FAILED] = UNIT_FAILED,
119 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
120 };
121
122 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
123 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
124 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
125
126 static void service_init(Unit *u) {
127 Service *s = SERVICE(u);
128
129 assert(u);
130 assert(u->load_state == UNIT_STUB);
131
132 s->timeout_start_usec = u->manager->default_timeout_start_usec;
133 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
134 s->restart_usec = u->manager->default_restart_usec;
135 s->type = _SERVICE_TYPE_INVALID;
136
137 #ifdef HAVE_SYSV_COMPAT
138 s->sysv_start_priority = -1;
139 s->sysv_start_priority_from_rcnd = -1;
140 #endif
141 s->socket_fd = -1;
142 s->guess_main_pid = true;
143
144 exec_context_init(&s->exec_context);
145 kill_context_init(&s->kill_context);
146 cgroup_context_init(&s->cgroup_context);
147
148 RATELIMIT_INIT(s->start_limit,
149 u->manager->default_start_limit_interval,
150 u->manager->default_start_limit_burst);
151
152 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
153 }
154
155 static void service_unwatch_control_pid(Service *s) {
156 assert(s);
157
158 if (s->control_pid <= 0)
159 return;
160
161 unit_unwatch_pid(UNIT(s), s->control_pid);
162 s->control_pid = 0;
163 }
164
165 static void service_unwatch_main_pid(Service *s) {
166 assert(s);
167
168 if (s->main_pid <= 0)
169 return;
170
171 unit_unwatch_pid(UNIT(s), s->main_pid);
172 s->main_pid = 0;
173 }
174
175 static void service_unwatch_pid_file(Service *s) {
176 if (!s->pid_file_pathspec)
177 return;
178
179 log_debug_unit(UNIT(s)->id, "Stopping watch for %s's PID file %s",
180 UNIT(s)->id, s->pid_file_pathspec->path);
181 path_spec_unwatch(s->pid_file_pathspec);
182 path_spec_done(s->pid_file_pathspec);
183 free(s->pid_file_pathspec);
184 s->pid_file_pathspec = NULL;
185 }
186
187 static int service_set_main_pid(Service *s, pid_t pid) {
188 pid_t ppid;
189
190 assert(s);
191
192 if (pid <= 1)
193 return -EINVAL;
194
195 if (pid == getpid())
196 return -EINVAL;
197
198 if (s->main_pid == pid && s->main_pid_known)
199 return 0;
200
201 if (s->main_pid != pid) {
202 service_unwatch_main_pid(s);
203 exec_status_start(&s->main_exec_status, pid);
204 }
205
206 s->main_pid = pid;
207 s->main_pid_known = true;
208
209 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
210 log_warning_unit(UNIT(s)->id,
211 "%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
212 UNIT(s)->id, (unsigned long) pid);
213
214 s->main_pid_alien = true;
215 } else
216 s->main_pid_alien = false;
217
218 return 0;
219 }
220
221 static void service_close_socket_fd(Service *s) {
222 assert(s);
223
224 if (s->socket_fd < 0)
225 return;
226
227 close_nointr_nofail(s->socket_fd);
228 s->socket_fd = -1;
229 }
230
231 static void service_connection_unref(Service *s) {
232 assert(s);
233
234 if (!UNIT_ISSET(s->accept_socket))
235 return;
236
237 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
238 unit_ref_unset(&s->accept_socket);
239 }
240
241 static void service_stop_watchdog(Service *s) {
242 assert(s);
243
244 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
245 s->watchdog_timestamp = (struct dual_timestamp) { 0, 0 };
246 }
247
248 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
249
250 static void service_handle_watchdog(Service *s) {
251 usec_t nw;
252 int r;
253
254 assert(s);
255
256 if (s->watchdog_usec == 0)
257 return;
258
259 nw = now(CLOCK_MONOTONIC);
260 if (nw >= s->watchdog_timestamp.monotonic + s->watchdog_usec) {
261 log_error_unit(UNIT(s)->id, "%s watchdog timeout!", UNIT(s)->id);
262 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_WATCHDOG);
263 return;
264 }
265
266 if (s->watchdog_event_source) {
267 r = sd_event_source_set_time(s->watchdog_event_source, s->watchdog_timestamp.monotonic + s->watchdog_usec);
268 if (r < 0) {
269 log_warning_unit(UNIT(s)->id, "%s failed to reset watchdog timer: %s", UNIT(s)->id, strerror(-r));
270 return;
271 }
272
273 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ON);
274 } else
275 r = sd_event_add_monotonic(UNIT(s)->manager->event, s->watchdog_timestamp.monotonic + s->watchdog_usec, 0, service_dispatch_watchdog, s, &s->watchdog_event_source);
276
277 if (r < 0)
278 log_warning_unit(UNIT(s)->id,
279 "%s failed to install watchdog timer: %s",
280 UNIT(s)->id, strerror(-r));
281 }
282
283 static void service_reset_watchdog(Service *s) {
284 assert(s);
285
286 dual_timestamp_get(&s->watchdog_timestamp);
287 service_handle_watchdog(s);
288 }
289
290 static void service_done(Unit *u) {
291 Service *s = SERVICE(u);
292
293 assert(s);
294
295 free(s->pid_file);
296 s->pid_file = NULL;
297
298 #ifdef HAVE_SYSV_COMPAT
299 free(s->sysv_runlevels);
300 s->sysv_runlevels = NULL;
301 #endif
302
303 free(s->status_text);
304 s->status_text = NULL;
305
306 cgroup_context_done(&s->cgroup_context);
307 exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager));
308 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
309 s->control_command = NULL;
310 s->main_command = NULL;
311
312 set_free(s->restart_ignore_status.code);
313 s->restart_ignore_status.code = NULL;
314 set_free(s->restart_ignore_status.signal);
315 s->restart_ignore_status.signal = NULL;
316
317 set_free(s->success_status.code);
318 s->success_status.code = NULL;
319 set_free(s->success_status.signal);
320 s->success_status.signal = NULL;
321
322 /* This will leak a process, but at least no memory or any of
323 * our resources */
324 service_unwatch_main_pid(s);
325 service_unwatch_control_pid(s);
326 service_unwatch_pid_file(s);
327
328 if (s->bus_name) {
329 unit_unwatch_bus_name(u, s->bus_name);
330 free(s->bus_name);
331 s->bus_name = NULL;
332 }
333
334 service_close_socket_fd(s);
335 service_connection_unref(s);
336
337 unit_ref_unset(&s->accept_socket);
338
339 service_stop_watchdog(s);
340
341 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
342 }
343
344 static int service_arm_timer(Service *s, usec_t usec) {
345 int r;
346
347 assert(s);
348
349 if (usec <= 0) {
350 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
351 return 0;
352 }
353
354 if (s->timer_event_source) {
355 r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + usec);
356 if (r < 0)
357 return r;
358
359 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
360 }
361
362 return sd_event_add_monotonic(UNIT(s)->manager->event, now(CLOCK_MONOTONIC) + usec, 0, service_dispatch_timer, s, &s->timer_event_source);
363 }
364
365 #ifdef HAVE_SYSV_COMPAT
366 static char *sysv_translate_name(const char *name) {
367 char *r;
368
369 r = new(char, strlen(name) + sizeof(".service"));
370 if (!r)
371 return NULL;
372
373 if (endswith(name, ".sh"))
374 /* Drop .sh suffix */
375 strcpy(stpcpy(r, name) - 3, ".service");
376 else
377 /* Normal init script name */
378 strcpy(stpcpy(r, name), ".service");
379
380 return r;
381 }
382
383 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
384
385 /* We silently ignore the $ prefix here. According to the LSB
386 * spec it simply indicates whether something is a
387 * standardized name or a distribution-specific one. Since we
388 * just follow what already exists and do not introduce new
389 * uses or names we don't care who introduced a new name. */
390
391 static const char * const table[] = {
392 /* LSB defined facilities */
393 "local_fs", NULL,
394 "network", SPECIAL_NETWORK_TARGET,
395 "named", SPECIAL_NSS_LOOKUP_TARGET,
396 "portmap", SPECIAL_RPCBIND_TARGET,
397 "remote_fs", SPECIAL_REMOTE_FS_TARGET,
398 "syslog", NULL,
399 "time", SPECIAL_TIME_SYNC_TARGET,
400 };
401
402 unsigned i;
403 char *r;
404 const char *n;
405
406 assert(name);
407 assert(_r);
408
409 n = *name == '$' ? name + 1 : name;
410
411 for (i = 0; i < ELEMENTSOF(table); i += 2) {
412
413 if (!streq(table[i], n))
414 continue;
415
416 if (!table[i+1])
417 return 0;
418
419 r = strdup(table[i+1]);
420 if (!r)
421 return log_oom();
422
423 goto finish;
424 }
425
426 /* If we don't know this name, fallback heuristics to figure
427 * out whether something is a target or a service alias. */
428
429 if (*name == '$') {
430 if (!unit_prefix_is_valid(n))
431 return -EINVAL;
432
433 /* Facilities starting with $ are most likely targets */
434 r = unit_name_build(n, NULL, ".target");
435 } else if (filename && streq(name, filename))
436 /* Names equaling the file name of the services are redundant */
437 return 0;
438 else
439 /* Everything else we assume to be normal service names */
440 r = sysv_translate_name(n);
441
442 if (!r)
443 return -ENOMEM;
444
445 finish:
446 *_r = r;
447
448 return 1;
449 }
450
451 static int sysv_fix_order(Service *s) {
452 Unit *other;
453 int r;
454
455 assert(s);
456
457 if (s->sysv_start_priority < 0)
458 return 0;
459
460 /* For each pair of services where at least one lacks a LSB
461 * header, we use the start priority value to order things. */
462
463 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
464 Service *t;
465 UnitDependency d;
466 bool special_s, special_t;
467
468 t = SERVICE(other);
469
470 if (s == t)
471 continue;
472
473 if (UNIT(t)->load_state != UNIT_LOADED)
474 continue;
475
476 if (t->sysv_start_priority < 0)
477 continue;
478
479 /* If both units have modern headers we don't care
480 * about the priorities */
481 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
482 (UNIT(t)->fragment_path || t->sysv_has_lsb))
483 continue;
484
485 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
486 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
487
488 if (special_t && !special_s)
489 d = UNIT_AFTER;
490 else if (special_s && !special_t)
491 d = UNIT_BEFORE;
492 else if (t->sysv_start_priority < s->sysv_start_priority)
493 d = UNIT_AFTER;
494 else if (t->sysv_start_priority > s->sysv_start_priority)
495 d = UNIT_BEFORE;
496 else
497 continue;
498
499 /* FIXME: Maybe we should compare the name here lexicographically? */
500
501 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
502 return r;
503 }
504
505 return 0;
506 }
507
508 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
509 ExecCommand *c;
510
511 if (!(c = new0(ExecCommand, 1)))
512 return NULL;
513
514 if (!(c->path = strdup(path))) {
515 free(c);
516 return NULL;
517 }
518
519 if (!(c->argv = strv_new(path, arg1, NULL))) {
520 free(c->path);
521 free(c);
522 return NULL;
523 }
524
525 return c;
526 }
527
528 static int sysv_exec_commands(Service *s, const bool supports_reload) {
529 ExecCommand *c;
530
531 assert(s);
532 assert(s->is_sysv);
533 assert(UNIT(s)->source_path);
534
535 c = exec_command_new(UNIT(s)->source_path, "start");
536 if (!c)
537 return -ENOMEM;
538 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
539
540 c = exec_command_new(UNIT(s)->source_path, "stop");
541 if (!c)
542 return -ENOMEM;
543 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
544
545 if (supports_reload) {
546 c = exec_command_new(UNIT(s)->source_path, "reload");
547 if (!c)
548 return -ENOMEM;
549 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
550 }
551
552 return 0;
553 }
554
555 static bool usage_contains_reload(const char *line) {
556 return (strcasestr(line, "{reload|") ||
557 strcasestr(line, "{reload}") ||
558 strcasestr(line, "{reload\"") ||
559 strcasestr(line, "|reload|") ||
560 strcasestr(line, "|reload}") ||
561 strcasestr(line, "|reload\""));
562 }
563
564 static int service_load_sysv_path(Service *s, const char *path) {
565 FILE *f;
566 Unit *u;
567 unsigned line = 0;
568 int r;
569 enum {
570 NORMAL,
571 DESCRIPTION,
572 LSB,
573 LSB_DESCRIPTION,
574 USAGE_CONTINUATION
575 } state = NORMAL;
576 char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
577 struct stat st;
578 bool supports_reload = false;
579
580 assert(s);
581 assert(path);
582
583 u = UNIT(s);
584
585 f = fopen(path, "re");
586 if (!f) {
587 r = errno == ENOENT ? 0 : -errno;
588 goto finish;
589 }
590
591 if (fstat(fileno(f), &st) < 0) {
592 r = -errno;
593 goto finish;
594 }
595
596 free(u->source_path);
597 u->source_path = strdup(path);
598 if (!u->source_path) {
599 r = -ENOMEM;
600 goto finish;
601 }
602 u->source_mtime = timespec_load(&st.st_mtim);
603
604 if (null_or_empty(&st)) {
605 u->load_state = UNIT_MASKED;
606 r = 0;
607 goto finish;
608 }
609
610 s->is_sysv = true;
611
612 while (!feof(f)) {
613 char l[LINE_MAX], *t;
614
615 if (!fgets(l, sizeof(l), f)) {
616 if (feof(f))
617 break;
618
619 r = -errno;
620 log_error_unit(u->id,
621 "Failed to read configuration file '%s': %s",
622 path, strerror(-r));
623 goto finish;
624 }
625
626 line++;
627
628 t = strstrip(l);
629 if (*t != '#') {
630 /* Try to figure out whether this init script supports
631 * the reload operation. This heuristic looks for
632 * "Usage" lines which include the reload option. */
633 if ( state == USAGE_CONTINUATION ||
634 (state == NORMAL && strcasestr(t, "usage"))) {
635 if (usage_contains_reload(t)) {
636 supports_reload = true;
637 state = NORMAL;
638 } else if (t[strlen(t)-1] == '\\')
639 state = USAGE_CONTINUATION;
640 else
641 state = NORMAL;
642 }
643
644 continue;
645 }
646
647 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
648 state = LSB;
649 s->sysv_has_lsb = true;
650 continue;
651 }
652
653 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
654 state = NORMAL;
655 continue;
656 }
657
658 t++;
659 t += strspn(t, WHITESPACE);
660
661 if (state == NORMAL) {
662
663 /* Try to parse Red Hat style chkconfig headers */
664
665 if (startswith_no_case(t, "chkconfig:")) {
666 int start_priority;
667 char runlevels[16], *k;
668
669 state = NORMAL;
670
671 if (sscanf(t+10, "%15s %i %*i",
672 runlevels,
673 &start_priority) != 2) {
674
675 log_warning_unit(u->id,
676 "[%s:%u] Failed to parse chkconfig line. Ignoring.",
677 path, line);
678 continue;
679 }
680
681 /* A start priority gathered from the
682 * symlink farms is preferred over the
683 * data from the LSB header. */
684 if (start_priority < 0 || start_priority > 99)
685 log_warning_unit(u->id,
686 "[%s:%u] Start priority out of range. Ignoring.",
687 path, line);
688 else
689 s->sysv_start_priority = start_priority;
690
691 char_array_0(runlevels);
692 k = delete_chars(runlevels, WHITESPACE "-");
693
694 if (k[0]) {
695 char *d;
696
697 if (!(d = strdup(k))) {
698 r = -ENOMEM;
699 goto finish;
700 }
701
702 free(s->sysv_runlevels);
703 s->sysv_runlevels = d;
704 }
705
706 } else if (startswith_no_case(t, "description:")) {
707
708 size_t k = strlen(t);
709 char *d;
710 const char *j;
711
712 if (t[k-1] == '\\') {
713 state = DESCRIPTION;
714 t[k-1] = 0;
715 }
716
717 if ((j = strstrip(t+12)) && *j) {
718 if (!(d = strdup(j))) {
719 r = -ENOMEM;
720 goto finish;
721 }
722 } else
723 d = NULL;
724
725 free(chkconfig_description);
726 chkconfig_description = d;
727
728 } else if (startswith_no_case(t, "pidfile:")) {
729
730 char *fn;
731
732 state = NORMAL;
733
734 fn = strstrip(t+8);
735 if (!path_is_absolute(fn)) {
736 log_warning_unit(u->id,
737 "[%s:%u] PID file not absolute. Ignoring.",
738 path, line);
739 continue;
740 }
741
742 if (!(fn = strdup(fn))) {
743 r = -ENOMEM;
744 goto finish;
745 }
746
747 free(s->pid_file);
748 s->pid_file = fn;
749 }
750
751 } else if (state == DESCRIPTION) {
752
753 /* Try to parse Red Hat style description
754 * continuation */
755
756 size_t k = strlen(t);
757 char *j;
758
759 if (t[k-1] == '\\')
760 t[k-1] = 0;
761 else
762 state = NORMAL;
763
764 if ((j = strstrip(t)) && *j) {
765 char *d = NULL;
766
767 if (chkconfig_description)
768 d = strjoin(chkconfig_description, " ", j, NULL);
769 else
770 d = strdup(j);
771
772 if (!d) {
773 r = -ENOMEM;
774 goto finish;
775 }
776
777 free(chkconfig_description);
778 chkconfig_description = d;
779 }
780
781 } else if (state == LSB || state == LSB_DESCRIPTION) {
782
783 if (startswith_no_case(t, "Provides:")) {
784 char *i, *w;
785 size_t z;
786
787 state = LSB;
788
789 FOREACH_WORD_QUOTED(w, z, t+9, i) {
790 char *n, *m;
791
792 if (!(n = strndup(w, z))) {
793 r = -ENOMEM;
794 goto finish;
795 }
796
797 r = sysv_translate_facility(n, path_get_file_name(path), &m);
798 free(n);
799
800 if (r < 0)
801 goto finish;
802
803 if (r == 0)
804 continue;
805
806 if (unit_name_to_type(m) == UNIT_SERVICE)
807 r = unit_merge_by_name(u, m);
808 else
809 /* NB: SysV targets
810 * which are provided
811 * by a service are
812 * pulled in by the
813 * services, as an
814 * indication that the
815 * generic service is
816 * now available. This
817 * is strictly
818 * one-way. The
819 * targets do NOT pull
820 * in the SysV
821 * services! */
822 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
823
824 if (r < 0)
825 log_error_unit(u->id,
826 "[%s:%u] Failed to add LSB Provides name %s, ignoring: %s",
827 path, line, m, strerror(-r));
828
829 free(m);
830 }
831
832 } else if (startswith_no_case(t, "Required-Start:") ||
833 startswith_no_case(t, "Should-Start:") ||
834 startswith_no_case(t, "X-Start-Before:") ||
835 startswith_no_case(t, "X-Start-After:")) {
836 char *i, *w;
837 size_t z;
838
839 state = LSB;
840
841 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
842 char *n, *m;
843
844 if (!(n = strndup(w, z))) {
845 r = -ENOMEM;
846 goto finish;
847 }
848
849 r = sysv_translate_facility(n, path_get_file_name(path), &m);
850 if (r < 0) {
851 log_error_unit(u->id,
852 "[%s:%u] Failed to translate LSB dependency %s, ignoring: %s",
853 path, line, n, strerror(-r));
854 free(n);
855 continue;
856 }
857
858 free(n);
859
860 if (r == 0)
861 continue;
862
863 r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
864
865 if (r < 0)
866 log_error_unit(u->id, "[%s:%u] Failed to add dependency on %s, ignoring: %s",
867 path, line, m, strerror(-r));
868
869 free(m);
870 }
871 } else if (startswith_no_case(t, "Default-Start:")) {
872 char *k, *d;
873
874 state = LSB;
875
876 k = delete_chars(t+14, WHITESPACE "-");
877
878 if (k[0] != 0) {
879 if (!(d = strdup(k))) {
880 r = -ENOMEM;
881 goto finish;
882 }
883
884 free(s->sysv_runlevels);
885 s->sysv_runlevels = d;
886 }
887
888 } else if (startswith_no_case(t, "Description:")) {
889 char *d, *j;
890
891 state = LSB_DESCRIPTION;
892
893 if ((j = strstrip(t+12)) && *j) {
894 if (!(d = strdup(j))) {
895 r = -ENOMEM;
896 goto finish;
897 }
898 } else
899 d = NULL;
900
901 free(long_description);
902 long_description = d;
903
904 } else if (startswith_no_case(t, "Short-Description:")) {
905 char *d, *j;
906
907 state = LSB;
908
909 if ((j = strstrip(t+18)) && *j) {
910 if (!(d = strdup(j))) {
911 r = -ENOMEM;
912 goto finish;
913 }
914 } else
915 d = NULL;
916
917 free(short_description);
918 short_description = d;
919
920 } else if (state == LSB_DESCRIPTION) {
921
922 if (startswith(l, "#\t") || startswith(l, "# ")) {
923 char *j;
924
925 if ((j = strstrip(t)) && *j) {
926 char *d = NULL;
927
928 if (long_description)
929 d = strjoin(long_description, " ", t, NULL);
930 else
931 d = strdup(j);
932
933 if (!d) {
934 r = -ENOMEM;
935 goto finish;
936 }
937
938 free(long_description);
939 long_description = d;
940 }
941
942 } else
943 state = LSB;
944 }
945 }
946 }
947
948 if ((r = sysv_exec_commands(s, supports_reload)) < 0)
949 goto finish;
950
951 if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
952 /* If there a runlevels configured for this service
953 * but none of the standard ones, then we assume this
954 * is some special kind of service (which might be
955 * needed for early boot) and don't create any links
956 * to it. */
957
958 UNIT(s)->default_dependencies = false;
959
960 /* Don't timeout special services during boot (like fsck) */
961 s->timeout_start_usec = 0;
962 s->timeout_stop_usec = 0;
963 } else {
964 s->timeout_start_usec = DEFAULT_SYSV_TIMEOUT_USEC;
965 s->timeout_stop_usec = DEFAULT_SYSV_TIMEOUT_USEC;
966 }
967
968 /* Special setting for all SysV services */
969 s->type = SERVICE_FORKING;
970 s->remain_after_exit = !s->pid_file;
971 s->guess_main_pid = false;
972 s->restart = SERVICE_RESTART_NO;
973 s->exec_context.ignore_sigpipe = false;
974 s->kill_context.kill_mode = KILL_PROCESS;
975
976 /* We use the long description only if
977 * no short description is set. */
978
979 if (short_description)
980 description = short_description;
981 else if (chkconfig_description)
982 description = chkconfig_description;
983 else if (long_description)
984 description = long_description;
985 else
986 description = NULL;
987
988 if (description) {
989 char *d;
990
991 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
992 r = -ENOMEM;
993 goto finish;
994 }
995
996 u->description = d;
997 }
998
999 /* The priority that has been set in /etc/rcN.d/ hierarchies
1000 * takes precedence over what is stored as default in the LSB
1001 * header */
1002 if (s->sysv_start_priority_from_rcnd >= 0)
1003 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
1004
1005 u->load_state = UNIT_LOADED;
1006 r = 0;
1007
1008 finish:
1009
1010 if (f)
1011 fclose(f);
1012
1013 free(short_description);
1014 free(long_description);
1015 free(chkconfig_description);
1016
1017 return r;
1018 }
1019
1020 static int service_load_sysv_name(Service *s, const char *name) {
1021 char **p;
1022
1023 assert(s);
1024 assert(name);
1025
1026 /* For SysV services we strip the *.sh suffixes. */
1027 if (endswith(name, ".sh.service"))
1028 return -ENOENT;
1029
1030 STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
1031 char *path;
1032 int r;
1033
1034 path = strjoin(*p, "/", name, NULL);
1035 if (!path)
1036 return -ENOMEM;
1037
1038 assert(endswith(path, ".service"));
1039 path[strlen(path)-8] = 0;
1040
1041 r = service_load_sysv_path(s, path);
1042
1043 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1044 /* Try *.sh source'able init scripts */
1045 strcat(path, ".sh");
1046 r = service_load_sysv_path(s, path);
1047 }
1048 free(path);
1049
1050 if (r < 0)
1051 return r;
1052
1053 if (UNIT(s)->load_state != UNIT_STUB)
1054 break;
1055 }
1056
1057 return 0;
1058 }
1059
1060 static int service_load_sysv(Service *s) {
1061 const char *t;
1062 Iterator i;
1063 int r;
1064
1065 assert(s);
1066
1067 /* Load service data from SysV init scripts, preferably with
1068 * LSB headers ... */
1069
1070 if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1071 return 0;
1072
1073 if ((t = UNIT(s)->id))
1074 if ((r = service_load_sysv_name(s, t)) < 0)
1075 return r;
1076
1077 if (UNIT(s)->load_state == UNIT_STUB)
1078 SET_FOREACH(t, UNIT(s)->names, i) {
1079 if (t == UNIT(s)->id)
1080 continue;
1081
1082 if ((r = service_load_sysv_name(s, t)) < 0)
1083 return r;
1084
1085 if (UNIT(s)->load_state != UNIT_STUB)
1086 break;
1087 }
1088
1089 return 0;
1090 }
1091 #endif
1092
1093 static int service_verify(Service *s) {
1094 assert(s);
1095
1096 if (UNIT(s)->load_state != UNIT_LOADED)
1097 return 0;
1098
1099 if (!s->exec_command[SERVICE_EXEC_START]) {
1100 log_error_unit(UNIT(s)->id,
1101 "%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1102 return -EINVAL;
1103 }
1104
1105 if (s->type != SERVICE_ONESHOT &&
1106 s->exec_command[SERVICE_EXEC_START]->command_next) {
1107 log_error_unit(UNIT(s)->id,
1108 "%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1109 return -EINVAL;
1110 }
1111
1112 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
1113 log_error_unit(UNIT(s)->id,
1114 "%s has Restart setting other than no, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1115 return -EINVAL;
1116 }
1117
1118 if (s->type == SERVICE_DBUS && !s->bus_name) {
1119 log_error_unit(UNIT(s)->id,
1120 "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1121 return -EINVAL;
1122 }
1123
1124 if (s->bus_name && s->type != SERVICE_DBUS)
1125 log_warning_unit(UNIT(s)->id,
1126 "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
1127
1128 if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
1129 log_error_unit(UNIT(s)->id,
1130 "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
1131 return -EINVAL;
1132 }
1133
1134 return 0;
1135 }
1136
1137 static int service_add_default_dependencies(Service *s) {
1138 int r;
1139
1140 assert(s);
1141
1142 /* Add a number of automatic dependencies useful for the
1143 * majority of services. */
1144
1145 /* First, pull in base system */
1146 if (UNIT(s)->manager->running_as == SYSTEMD_SYSTEM) {
1147 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1148 SPECIAL_BASIC_TARGET, NULL, true);
1149 if (r < 0)
1150 return r;
1151
1152 } else if (UNIT(s)->manager->running_as == SYSTEMD_USER) {
1153 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1154 SPECIAL_SOCKETS_TARGET, NULL, true);
1155 if (r < 0)
1156 return r;
1157
1158 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1159 SPECIAL_TIMERS_TARGET, NULL, true);
1160 if (r < 0)
1161 return r;
1162
1163 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1164 SPECIAL_PATHS_TARGET, NULL, true);
1165 if (r < 0)
1166 return r;
1167 }
1168
1169 /* Second, activate normal shutdown */
1170 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS,
1171 SPECIAL_SHUTDOWN_TARGET, NULL, true);
1172 return r;
1173 }
1174
1175 static void service_fix_output(Service *s) {
1176 assert(s);
1177
1178 /* If nothing has been explicitly configured, patch default
1179 * output in. If input is socket/tty we avoid this however,
1180 * since in that case we want output to default to the same
1181 * place as we read input from. */
1182
1183 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1184 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1185 s->exec_context.std_input == EXEC_INPUT_NULL)
1186 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1187
1188 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1189 s->exec_context.std_input == EXEC_INPUT_NULL)
1190 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1191 }
1192
1193 static int service_load(Unit *u) {
1194 int r;
1195 Service *s = SERVICE(u);
1196
1197 assert(s);
1198
1199 /* Load a .service file */
1200 r = unit_load_fragment(u);
1201 if (r < 0)
1202 return r;
1203
1204 #ifdef HAVE_SYSV_COMPAT
1205 /* Load a classic init script as a fallback, if we couldn't find anything */
1206 if (u->load_state == UNIT_STUB) {
1207 r = service_load_sysv(s);
1208 if (r < 0)
1209 return r;
1210 }
1211 #endif
1212
1213 /* Still nothing found? Then let's give up */
1214 if (u->load_state == UNIT_STUB)
1215 return -ENOENT;
1216
1217 /* This is a new unit? Then let's add in some extras */
1218 if (u->load_state == UNIT_LOADED) {
1219
1220 /* We were able to load something, then let's add in
1221 * the dropin directories. */
1222 r = unit_load_dropin(u);
1223 if (r < 0)
1224 return r;
1225
1226 if (s->type == _SERVICE_TYPE_INVALID)
1227 s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
1228
1229 /* Oneshot services have disabled start timeout by default */
1230 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
1231 s->timeout_start_usec = 0;
1232
1233 service_fix_output(s);
1234
1235 r = unit_add_exec_dependencies(u, &s->exec_context);
1236 if (r < 0)
1237 return r;
1238
1239 r = unit_add_default_slice(u);
1240 if (r < 0)
1241 return r;
1242
1243 #ifdef HAVE_SYSV_COMPAT
1244 r = sysv_fix_order(s);
1245 if (r < 0)
1246 return r;
1247 #endif
1248
1249 if (s->bus_name) {
1250 r = unit_watch_bus_name(u, s->bus_name);
1251 if (r < 0)
1252 return r;
1253 }
1254
1255 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1256 s->notify_access = NOTIFY_MAIN;
1257
1258 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1259 s->notify_access = NOTIFY_MAIN;
1260
1261 if (s->type == SERVICE_DBUS || s->bus_name) {
1262 r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES,
1263 SPECIAL_DBUS_SOCKET, NULL, true);
1264 if (r < 0)
1265 return r;
1266 }
1267
1268 if (UNIT(s)->default_dependencies) {
1269 r = service_add_default_dependencies(s);
1270 if (r < 0)
1271 return r;
1272 }
1273
1274 r = unit_exec_context_defaults(u, &s->exec_context);
1275 if (r < 0)
1276 return r;
1277 }
1278
1279 return service_verify(s);
1280 }
1281
1282 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1283
1284 ServiceExecCommand c;
1285 Service *s = SERVICE(u);
1286 const char *prefix2;
1287 _cleanup_free_ char *p2 = NULL;
1288
1289 assert(s);
1290
1291 p2 = strappend(prefix, "\t");
1292 prefix2 = p2 ? p2 : prefix;
1293
1294 fprintf(f,
1295 "%sService State: %s\n"
1296 "%sResult: %s\n"
1297 "%sReload Result: %s\n"
1298 "%sPermissionsStartOnly: %s\n"
1299 "%sRootDirectoryStartOnly: %s\n"
1300 "%sRemainAfterExit: %s\n"
1301 "%sGuessMainPID: %s\n"
1302 "%sType: %s\n"
1303 "%sRestart: %s\n"
1304 "%sNotifyAccess: %s\n",
1305 prefix, service_state_to_string(s->state),
1306 prefix, service_result_to_string(s->result),
1307 prefix, service_result_to_string(s->reload_result),
1308 prefix, yes_no(s->permissions_start_only),
1309 prefix, yes_no(s->root_directory_start_only),
1310 prefix, yes_no(s->remain_after_exit),
1311 prefix, yes_no(s->guess_main_pid),
1312 prefix, service_type_to_string(s->type),
1313 prefix, service_restart_to_string(s->restart),
1314 prefix, notify_access_to_string(s->notify_access));
1315
1316 if (s->control_pid > 0)
1317 fprintf(f,
1318 "%sControl PID: %lu\n",
1319 prefix, (unsigned long) s->control_pid);
1320
1321 if (s->main_pid > 0)
1322 fprintf(f,
1323 "%sMain PID: %lu\n"
1324 "%sMain PID Known: %s\n"
1325 "%sMain PID Alien: %s\n",
1326 prefix, (unsigned long) s->main_pid,
1327 prefix, yes_no(s->main_pid_known),
1328 prefix, yes_no(s->main_pid_alien));
1329
1330 if (s->pid_file)
1331 fprintf(f,
1332 "%sPIDFile: %s\n",
1333 prefix, s->pid_file);
1334
1335 if (s->bus_name)
1336 fprintf(f,
1337 "%sBusName: %s\n"
1338 "%sBus Name Good: %s\n",
1339 prefix, s->bus_name,
1340 prefix, yes_no(s->bus_name_good));
1341
1342 kill_context_dump(&s->kill_context, f, prefix);
1343 exec_context_dump(&s->exec_context, f, prefix);
1344
1345 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1346
1347 if (!s->exec_command[c])
1348 continue;
1349
1350 fprintf(f, "%s-> %s:\n",
1351 prefix, service_exec_command_to_string(c));
1352
1353 exec_command_dump_list(s->exec_command[c], f, prefix2);
1354 }
1355
1356 #ifdef HAVE_SYSV_COMPAT
1357 if (s->is_sysv)
1358 fprintf(f,
1359 "%sSysV Init Script has LSB Header: %s\n"
1360 "%sSysVEnabled: %s\n",
1361 prefix, yes_no(s->sysv_has_lsb),
1362 prefix, yes_no(s->sysv_enabled));
1363
1364 if (s->sysv_start_priority >= 0)
1365 fprintf(f,
1366 "%sSysVStartPriority: %i\n",
1367 prefix, s->sysv_start_priority);
1368
1369 if (s->sysv_runlevels)
1370 fprintf(f, "%sSysVRunLevels: %s\n",
1371 prefix, s->sysv_runlevels);
1372 #endif
1373
1374 if (s->status_text)
1375 fprintf(f, "%sStatus Text: %s\n",
1376 prefix, s->status_text);
1377 }
1378
1379 static int service_load_pid_file(Service *s, bool may_warn) {
1380 _cleanup_free_ char *k = NULL;
1381 int r;
1382 pid_t pid;
1383
1384 assert(s);
1385
1386 if (!s->pid_file)
1387 return -ENOENT;
1388
1389 r = read_one_line_file(s->pid_file, &k);
1390 if (r < 0) {
1391 if (may_warn)
1392 log_info_unit(UNIT(s)->id,
1393 "PID file %s not readable (yet?) after %s.",
1394 s->pid_file, service_state_to_string(s->state));
1395 return r;
1396 }
1397
1398 r = parse_pid(k, &pid);
1399 if (r < 0) {
1400 if (may_warn)
1401 log_info_unit(UNIT(s)->id,
1402 "Failed to read PID from file %s: %s",
1403 s->pid_file, strerror(-r));
1404 return r;
1405 }
1406
1407 if (kill(pid, 0) < 0 && errno != EPERM) {
1408 if (may_warn)
1409 log_info_unit(UNIT(s)->id,
1410 "PID %lu read from file %s does not exist.",
1411 (unsigned long) pid, s->pid_file);
1412 return -ESRCH;
1413 }
1414
1415 if (s->main_pid_known) {
1416 if (pid == s->main_pid)
1417 return 0;
1418
1419 log_debug_unit(UNIT(s)->id,
1420 "Main PID changing: %lu -> %lu",
1421 (unsigned long) s->main_pid, (unsigned long) pid);
1422 service_unwatch_main_pid(s);
1423 s->main_pid_known = false;
1424 } else
1425 log_debug_unit(UNIT(s)->id,
1426 "Main PID loaded: %lu", (unsigned long) pid);
1427
1428 r = service_set_main_pid(s, pid);
1429 if (r < 0)
1430 return r;
1431
1432 r = unit_watch_pid(UNIT(s), pid);
1433 if (r < 0) {
1434 /* FIXME: we need to do something here */
1435 log_warning_unit(UNIT(s)->id,
1436 "Failed to watch PID %lu from service %s",
1437 (unsigned long) pid, UNIT(s)->id);
1438 return r;
1439 }
1440
1441 return 0;
1442 }
1443
1444 static int service_search_main_pid(Service *s) {
1445 pid_t pid;
1446 int r;
1447
1448 assert(s);
1449
1450 /* If we know it anyway, don't ever fallback to unreliable
1451 * heuristics */
1452 if (s->main_pid_known)
1453 return 0;
1454
1455 if (!s->guess_main_pid)
1456 return 0;
1457
1458 assert(s->main_pid <= 0);
1459
1460 pid = unit_search_main_pid(UNIT(s));
1461 if (pid <= 0)
1462 return -ENOENT;
1463
1464 log_debug_unit(UNIT(s)->id,
1465 "Main PID guessed: %lu", (unsigned long) pid);
1466 r = service_set_main_pid(s, pid);
1467 if (r < 0)
1468 return r;
1469
1470 r = unit_watch_pid(UNIT(s), pid);
1471 if (r < 0)
1472 /* FIXME: we need to do something here */
1473 log_warning_unit(UNIT(s)->id,
1474 "Failed to watch PID %lu from service %s",
1475 (unsigned long) pid, UNIT(s)->id);
1476 return r;
1477
1478 return 0;
1479 }
1480
1481 static void service_set_state(Service *s, ServiceState state) {
1482 ServiceState old_state;
1483 const UnitActiveState *table;
1484 assert(s);
1485
1486 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1487
1488 old_state = s->state;
1489 s->state = state;
1490
1491 service_unwatch_pid_file(s);
1492
1493 if (state != SERVICE_START_PRE &&
1494 state != SERVICE_START &&
1495 state != SERVICE_START_POST &&
1496 state != SERVICE_RELOAD &&
1497 state != SERVICE_STOP &&
1498 state != SERVICE_STOP_SIGTERM &&
1499 state != SERVICE_STOP_SIGKILL &&
1500 state != SERVICE_STOP_POST &&
1501 state != SERVICE_FINAL_SIGTERM &&
1502 state != SERVICE_FINAL_SIGKILL &&
1503 state != SERVICE_AUTO_RESTART)
1504 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1505
1506 if (state != SERVICE_START &&
1507 state != SERVICE_START_POST &&
1508 state != SERVICE_RUNNING &&
1509 state != SERVICE_RELOAD &&
1510 state != SERVICE_STOP &&
1511 state != SERVICE_STOP_SIGTERM &&
1512 state != SERVICE_STOP_SIGKILL) {
1513 service_unwatch_main_pid(s);
1514 s->main_command = NULL;
1515 }
1516
1517 if (state != SERVICE_START_PRE &&
1518 state != SERVICE_START &&
1519 state != SERVICE_START_POST &&
1520 state != SERVICE_RELOAD &&
1521 state != SERVICE_STOP &&
1522 state != SERVICE_STOP_SIGTERM &&
1523 state != SERVICE_STOP_SIGKILL &&
1524 state != SERVICE_STOP_POST &&
1525 state != SERVICE_FINAL_SIGTERM &&
1526 state != SERVICE_FINAL_SIGKILL) {
1527 service_unwatch_control_pid(s);
1528 s->control_command = NULL;
1529 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1530 }
1531
1532 if (state != SERVICE_START_PRE &&
1533 state != SERVICE_START &&
1534 state != SERVICE_START_POST &&
1535 state != SERVICE_RUNNING &&
1536 state != SERVICE_RELOAD &&
1537 state != SERVICE_STOP &&
1538 state != SERVICE_STOP_SIGTERM &&
1539 state != SERVICE_STOP_SIGKILL &&
1540 state != SERVICE_STOP_POST &&
1541 state != SERVICE_FINAL_SIGTERM &&
1542 state != SERVICE_FINAL_SIGKILL &&
1543 !(state == SERVICE_DEAD && UNIT(s)->job)) {
1544 service_close_socket_fd(s);
1545 service_connection_unref(s);
1546 }
1547
1548 if (state == SERVICE_STOP || state == SERVICE_STOP_SIGTERM)
1549 service_stop_watchdog(s);
1550
1551 /* For the inactive states unit_notify() will trim the cgroup,
1552 * but for exit we have to do that ourselves... */
1553 if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1554 unit_destroy_cgroup(UNIT(s));
1555
1556 /* For remain_after_exit services, let's see if we can "release" the
1557 * hold on the console, since unit_notify() only does that in case of
1558 * change of state */
1559 if (state == SERVICE_EXITED && s->remain_after_exit &&
1560 UNIT(s)->manager->n_on_console > 0) {
1561 ExecContext *ec = unit_get_exec_context(UNIT(s));
1562 if (ec && exec_context_may_touch_console(ec)) {
1563 Manager *m = UNIT(s)->manager;
1564
1565 m->n_on_console --;
1566 if (m->n_on_console == 0)
1567 /* unset no_console_output flag, since the console is free */
1568 m->no_console_output = false;
1569 }
1570 }
1571
1572 if (old_state != state)
1573 log_debug_unit(UNIT(s)->id,
1574 "%s changed %s -> %s", UNIT(s)->id,
1575 service_state_to_string(old_state),
1576 service_state_to_string(state));
1577
1578 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1579 s->reload_result = SERVICE_SUCCESS;
1580 }
1581
1582 static int service_coldplug(Unit *u) {
1583 Service *s = SERVICE(u);
1584 int r;
1585
1586 assert(s);
1587 assert(s->state == SERVICE_DEAD);
1588
1589 if (s->deserialized_state != s->state) {
1590
1591 if (s->deserialized_state == SERVICE_START_PRE ||
1592 s->deserialized_state == SERVICE_START ||
1593 s->deserialized_state == SERVICE_START_POST ||
1594 s->deserialized_state == SERVICE_RELOAD ||
1595 s->deserialized_state == SERVICE_STOP ||
1596 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1597 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1598 s->deserialized_state == SERVICE_STOP_POST ||
1599 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1600 s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1601 s->deserialized_state == SERVICE_AUTO_RESTART) {
1602
1603 if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_start_usec > 0) {
1604
1605 r = service_arm_timer(s,
1606 s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec :
1607 s->deserialized_state == SERVICE_START_PRE || s->deserialized_state == SERVICE_START ||
1608 s->deserialized_state == SERVICE_START_POST || s->deserialized_state == SERVICE_RELOAD ? s->timeout_start_usec :
1609 s->timeout_stop_usec);
1610 if (r < 0)
1611 return r;
1612 }
1613 }
1614
1615 if ((s->deserialized_state == SERVICE_START &&
1616 (s->type == SERVICE_FORKING ||
1617 s->type == SERVICE_DBUS ||
1618 s->type == SERVICE_ONESHOT ||
1619 s->type == SERVICE_NOTIFY)) ||
1620 s->deserialized_state == SERVICE_START_POST ||
1621 s->deserialized_state == SERVICE_RUNNING ||
1622 s->deserialized_state == SERVICE_RELOAD ||
1623 s->deserialized_state == SERVICE_STOP ||
1624 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1625 s->deserialized_state == SERVICE_STOP_SIGKILL)
1626 if (s->main_pid > 0) {
1627 r = unit_watch_pid(UNIT(s), s->main_pid);
1628 if (r < 0)
1629 return r;
1630 }
1631
1632 if (s->deserialized_state == SERVICE_START_PRE ||
1633 s->deserialized_state == SERVICE_START ||
1634 s->deserialized_state == SERVICE_START_POST ||
1635 s->deserialized_state == SERVICE_RELOAD ||
1636 s->deserialized_state == SERVICE_STOP ||
1637 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1638 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1639 s->deserialized_state == SERVICE_STOP_POST ||
1640 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1641 s->deserialized_state == SERVICE_FINAL_SIGKILL)
1642 if (s->control_pid > 0) {
1643 r = unit_watch_pid(UNIT(s), s->control_pid);
1644 if (r < 0)
1645 return r;
1646 }
1647
1648 if (s->deserialized_state == SERVICE_START_POST ||
1649 s->deserialized_state == SERVICE_RUNNING)
1650 service_handle_watchdog(s);
1651
1652 service_set_state(s, s->deserialized_state);
1653 }
1654 return 0;
1655 }
1656
1657 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1658 Iterator i;
1659 int r;
1660 int *rfds = NULL;
1661 unsigned rn_fds = 0;
1662 Unit *u;
1663
1664 assert(s);
1665 assert(fds);
1666 assert(n_fds);
1667
1668 if (s->socket_fd >= 0)
1669 return 0;
1670
1671 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1672 int *cfds;
1673 unsigned cn_fds;
1674 Socket *sock;
1675
1676 if (u->type != UNIT_SOCKET)
1677 continue;
1678
1679 sock = SOCKET(u);
1680
1681 r = socket_collect_fds(sock, &cfds, &cn_fds);
1682 if (r < 0)
1683 goto fail;
1684
1685 if (!cfds)
1686 continue;
1687
1688 if (!rfds) {
1689 rfds = cfds;
1690 rn_fds = cn_fds;
1691 } else {
1692 int *t;
1693
1694 t = new(int, rn_fds+cn_fds);
1695 if (!t) {
1696 free(cfds);
1697 r = -ENOMEM;
1698 goto fail;
1699 }
1700
1701 memcpy(t, rfds, rn_fds * sizeof(int));
1702 memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1703 free(rfds);
1704 free(cfds);
1705
1706 rfds = t;
1707 rn_fds = rn_fds+cn_fds;
1708 }
1709 }
1710
1711 *fds = rfds;
1712 *n_fds = rn_fds;
1713
1714 return 0;
1715
1716 fail:
1717 free(rfds);
1718
1719 return r;
1720 }
1721
1722 static int service_spawn(
1723 Service *s,
1724 ExecCommand *c,
1725 bool timeout,
1726 bool pass_fds,
1727 bool apply_permissions,
1728 bool apply_chroot,
1729 bool apply_tty_stdin,
1730 bool set_notify_socket,
1731 bool is_control,
1732 pid_t *_pid) {
1733
1734 pid_t pid;
1735 int r;
1736 int *fds = NULL;
1737 _cleanup_free_ int *fdsbuf = NULL;
1738 unsigned n_fds = 0, n_env = 0;
1739 _cleanup_strv_free_ char
1740 **argv = NULL, **final_env = NULL, **our_env = NULL;
1741 const char *path;
1742
1743 assert(s);
1744 assert(c);
1745 assert(_pid);
1746
1747 unit_realize_cgroup(UNIT(s));
1748
1749 if (pass_fds ||
1750 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1751 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1752 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1753
1754 if (s->socket_fd >= 0) {
1755 fds = &s->socket_fd;
1756 n_fds = 1;
1757 } else {
1758 r = service_collect_fds(s, &fdsbuf, &n_fds);
1759 if (r < 0)
1760 goto fail;
1761
1762 fds = fdsbuf;
1763 }
1764 }
1765
1766 r = service_arm_timer(s, timeout ? s->timeout_start_usec : 0);
1767 if (r < 0)
1768 goto fail;
1769
1770 r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
1771 if (r < 0)
1772 goto fail;
1773
1774 our_env = new0(char*, 5);
1775 if (!our_env) {
1776 r = -ENOMEM;
1777 goto fail;
1778 }
1779
1780 if (set_notify_socket)
1781 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1782 r = -ENOMEM;
1783 goto fail;
1784 }
1785
1786 if (s->main_pid > 0)
1787 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1788 r = -ENOMEM;
1789 goto fail;
1790 }
1791
1792 if (s->watchdog_usec > 0)
1793 if (asprintf(our_env + n_env++, "WATCHDOG_USEC=%llu", (unsigned long long) s->watchdog_usec) < 0) {
1794 r = -ENOMEM;
1795 goto fail;
1796 }
1797
1798 if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
1799 if (asprintf(our_env + n_env++, "MANAGERPID=%lu", (unsigned long) getpid()) < 0) {
1800 r = -ENOMEM;
1801 goto fail;
1802 }
1803
1804 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1805 if (!final_env) {
1806 r = -ENOMEM;
1807 goto fail;
1808 }
1809
1810 if (is_control && UNIT(s)->cgroup_path) {
1811 path = strappenda(UNIT(s)->cgroup_path, "/control");
1812 cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1813 } else
1814 path = UNIT(s)->cgroup_path;
1815
1816 r = exec_spawn(c,
1817 argv,
1818 &s->exec_context,
1819 fds, n_fds,
1820 final_env,
1821 apply_permissions,
1822 apply_chroot,
1823 apply_tty_stdin,
1824 UNIT(s)->manager->confirm_spawn,
1825 UNIT(s)->manager->cgroup_supported,
1826 path,
1827 UNIT(s)->id,
1828 s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
1829 &pid);
1830 if (r < 0)
1831 goto fail;
1832
1833 r = unit_watch_pid(UNIT(s), pid);
1834 if (r < 0)
1835 /* FIXME: we need to do something here */
1836 goto fail;
1837
1838 *_pid = pid;
1839
1840 return 0;
1841
1842 fail:
1843 if (timeout)
1844 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1845
1846 return r;
1847 }
1848
1849 static int main_pid_good(Service *s) {
1850 assert(s);
1851
1852 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1853 * don't know */
1854
1855 /* If we know the pid file, then lets just check if it is
1856 * still valid */
1857 if (s->main_pid_known) {
1858
1859 /* If it's an alien child let's check if it is still
1860 * alive ... */
1861 if (s->main_pid_alien && s->main_pid > 0)
1862 return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1863
1864 /* .. otherwise assume we'll get a SIGCHLD for it,
1865 * which we really should wait for to collect exit
1866 * status and code */
1867 return s->main_pid > 0;
1868 }
1869
1870 /* We don't know the pid */
1871 return -EAGAIN;
1872 }
1873
1874 _pure_ static int control_pid_good(Service *s) {
1875 assert(s);
1876
1877 return s->control_pid > 0;
1878 }
1879
1880 static int cgroup_good(Service *s) {
1881 int r;
1882
1883 assert(s);
1884
1885 if (!UNIT(s)->cgroup_path)
1886 return 0;
1887
1888 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
1889 if (r < 0)
1890 return r;
1891
1892 return !r;
1893 }
1894
1895 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1896 int r;
1897 assert(s);
1898
1899 if (f != SERVICE_SUCCESS)
1900 s->result = f;
1901
1902 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1903
1904 if (allow_restart &&
1905 !s->forbid_restart &&
1906 (s->restart == SERVICE_RESTART_ALWAYS ||
1907 (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1908 (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1909 (s->restart == SERVICE_RESTART_ON_WATCHDOG && s->result == SERVICE_FAILURE_WATCHDOG) ||
1910 (s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
1911 s->result == SERVICE_FAILURE_CORE_DUMP))) &&
1912 (s->result != SERVICE_FAILURE_EXIT_CODE ||
1913 !set_contains(s->restart_ignore_status.code, INT_TO_PTR(s->main_exec_status.status))) &&
1914 (s->result != SERVICE_FAILURE_SIGNAL ||
1915 !set_contains(s->restart_ignore_status.signal, INT_TO_PTR(s->main_exec_status.status)))) {
1916
1917 r = service_arm_timer(s, s->restart_usec);
1918 if (r < 0)
1919 goto fail;
1920
1921 service_set_state(s, SERVICE_AUTO_RESTART);
1922 }
1923
1924 s->forbid_restart = false;
1925
1926 /* we want fresh tmpdirs in case service is started again immediately */
1927 exec_context_tmp_dirs_done(&s->exec_context);
1928
1929 /* Try to delete the pid file. At this point it will be
1930 * out-of-date, and some software might be confused by it, so
1931 * let's remove it. */
1932 if (s->pid_file)
1933 unlink_noerrno(s->pid_file);
1934
1935 return;
1936
1937 fail:
1938 log_warning_unit(UNIT(s)->id,
1939 "%s failed to run install restart timer: %s",
1940 UNIT(s)->id, strerror(-r));
1941 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1942 }
1943
1944 static void service_enter_stop_post(Service *s, ServiceResult f) {
1945 int r;
1946 assert(s);
1947
1948 if (f != SERVICE_SUCCESS)
1949 s->result = f;
1950
1951 service_unwatch_control_pid(s);
1952
1953 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1954 if (s->control_command) {
1955 s->control_command_id = SERVICE_EXEC_STOP_POST;
1956
1957 r = service_spawn(s,
1958 s->control_command,
1959 true,
1960 false,
1961 !s->permissions_start_only,
1962 !s->root_directory_start_only,
1963 true,
1964 false,
1965 true,
1966 &s->control_pid);
1967 if (r < 0)
1968 goto fail;
1969
1970
1971 service_set_state(s, SERVICE_STOP_POST);
1972 } else
1973 service_enter_dead(s, SERVICE_SUCCESS, true);
1974
1975 return;
1976
1977 fail:
1978 log_warning_unit(UNIT(s)->id,
1979 "%s failed to run 'stop-post' task: %s",
1980 UNIT(s)->id, strerror(-r));
1981 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1982 }
1983
1984 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1985 int r;
1986
1987 assert(s);
1988
1989 if (f != SERVICE_SUCCESS)
1990 s->result = f;
1991
1992 r = unit_kill_context(
1993 UNIT(s),
1994 &s->kill_context,
1995 state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM,
1996 s->main_pid,
1997 s->control_pid,
1998 s->main_pid_alien);
1999 if (r < 0)
2000 goto fail;
2001
2002 if (r > 0) {
2003 if (s->timeout_stop_usec > 0) {
2004 r = service_arm_timer(s, s->timeout_stop_usec);
2005 if (r < 0)
2006 goto fail;
2007 }
2008
2009 service_set_state(s, state);
2010 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
2011 service_enter_stop_post(s, SERVICE_SUCCESS);
2012 else
2013 service_enter_dead(s, SERVICE_SUCCESS, true);
2014
2015 return;
2016
2017 fail:
2018 log_warning_unit(UNIT(s)->id,
2019 "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
2020
2021 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
2022 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
2023 else
2024 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2025 }
2026
2027 static void service_enter_stop(Service *s, ServiceResult f) {
2028 int r;
2029
2030 assert(s);
2031
2032 if (f != SERVICE_SUCCESS)
2033 s->result = f;
2034
2035 service_unwatch_control_pid(s);
2036
2037 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
2038 if (s->control_command) {
2039 s->control_command_id = SERVICE_EXEC_STOP;
2040
2041 r = service_spawn(s,
2042 s->control_command,
2043 true,
2044 false,
2045 !s->permissions_start_only,
2046 !s->root_directory_start_only,
2047 false,
2048 false,
2049 true,
2050 &s->control_pid);
2051 if (r < 0)
2052 goto fail;
2053
2054 service_set_state(s, SERVICE_STOP);
2055 } else
2056 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2057
2058 return;
2059
2060 fail:
2061 log_warning_unit(UNIT(s)->id,
2062 "%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2063 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2064 }
2065
2066 static void service_enter_running(Service *s, ServiceResult f) {
2067 int main_pid_ok, cgroup_ok;
2068 assert(s);
2069
2070 if (f != SERVICE_SUCCESS)
2071 s->result = f;
2072
2073 main_pid_ok = main_pid_good(s);
2074 cgroup_ok = cgroup_good(s);
2075
2076 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2077 (s->bus_name_good || s->type != SERVICE_DBUS))
2078 service_set_state(s, SERVICE_RUNNING);
2079 else if (s->remain_after_exit)
2080 service_set_state(s, SERVICE_EXITED);
2081 else
2082 service_enter_stop(s, SERVICE_SUCCESS);
2083 }
2084
2085 static void service_enter_start_post(Service *s) {
2086 int r;
2087 assert(s);
2088
2089 service_unwatch_control_pid(s);
2090
2091 if (s->watchdog_usec > 0)
2092 service_reset_watchdog(s);
2093
2094 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
2095 if (s->control_command) {
2096 s->control_command_id = SERVICE_EXEC_START_POST;
2097
2098 r = service_spawn(s,
2099 s->control_command,
2100 true,
2101 false,
2102 !s->permissions_start_only,
2103 !s->root_directory_start_only,
2104 false,
2105 false,
2106 true,
2107 &s->control_pid);
2108 if (r < 0)
2109 goto fail;
2110
2111 service_set_state(s, SERVICE_START_POST);
2112 } else
2113 service_enter_running(s, SERVICE_SUCCESS);
2114
2115 return;
2116
2117 fail:
2118 log_warning_unit(UNIT(s)->id,
2119 "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2120 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2121 }
2122
2123 static void service_kill_control_processes(Service *s) {
2124 char *p;
2125
2126 if (!UNIT(s)->cgroup_path)
2127 return;
2128
2129 p = strappenda(UNIT(s)->cgroup_path, "/control");
2130 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL);
2131 }
2132
2133 static void service_enter_start(Service *s) {
2134 ExecCommand *c;
2135 pid_t pid;
2136 int r;
2137
2138 assert(s);
2139
2140 assert(s->exec_command[SERVICE_EXEC_START]);
2141 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2142
2143 service_unwatch_control_pid(s);
2144 service_unwatch_main_pid(s);
2145
2146 /* We want to ensure that nobody leaks processes from
2147 * START_PRE here, so let's go on a killing spree, People
2148 * should not spawn long running processes from START_PRE. */
2149 service_kill_control_processes(s);
2150
2151 if (s->type == SERVICE_FORKING) {
2152 s->control_command_id = SERVICE_EXEC_START;
2153 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2154
2155 s->main_command = NULL;
2156 } else {
2157 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2158 s->control_command = NULL;
2159
2160 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2161 }
2162
2163 r = service_spawn(s,
2164 c,
2165 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS ||
2166 s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
2167 true,
2168 true,
2169 true,
2170 true,
2171 s->notify_access != NOTIFY_NONE,
2172 false,
2173 &pid);
2174 if (r < 0)
2175 goto fail;
2176
2177 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
2178 /* For simple services we immediately start
2179 * the START_POST binaries. */
2180
2181 service_set_main_pid(s, pid);
2182 service_enter_start_post(s);
2183
2184 } else if (s->type == SERVICE_FORKING) {
2185
2186 /* For forking services we wait until the start
2187 * process exited. */
2188
2189 s->control_pid = pid;
2190 service_set_state(s, SERVICE_START);
2191
2192 } else if (s->type == SERVICE_ONESHOT ||
2193 s->type == SERVICE_DBUS ||
2194 s->type == SERVICE_NOTIFY) {
2195
2196 /* For oneshot services we wait until the start
2197 * process exited, too, but it is our main process. */
2198
2199 /* For D-Bus services we know the main pid right away,
2200 * but wait for the bus name to appear on the
2201 * bus. Notify services are similar. */
2202
2203 service_set_main_pid(s, pid);
2204 service_set_state(s, SERVICE_START);
2205 } else
2206 assert_not_reached("Unknown service type");
2207
2208 return;
2209
2210 fail:
2211 log_warning_unit(UNIT(s)->id,
2212 "%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2213 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2214 }
2215
2216 static void service_enter_start_pre(Service *s) {
2217 int r;
2218
2219 assert(s);
2220
2221 service_unwatch_control_pid(s);
2222
2223 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
2224 if (s->control_command) {
2225 /* Before we start anything, let's clear up what might
2226 * be left from previous runs. */
2227 service_kill_control_processes(s);
2228
2229 s->control_command_id = SERVICE_EXEC_START_PRE;
2230
2231 r = service_spawn(s,
2232 s->control_command,
2233 true,
2234 false,
2235 !s->permissions_start_only,
2236 !s->root_directory_start_only,
2237 true,
2238 false,
2239 true,
2240 &s->control_pid);
2241 if (r < 0)
2242 goto fail;
2243
2244 service_set_state(s, SERVICE_START_PRE);
2245 } else
2246 service_enter_start(s);
2247
2248 return;
2249
2250 fail:
2251 log_warning_unit(UNIT(s)->id,
2252 "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2253 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2254 }
2255
2256 static void service_enter_restart(Service *s) {
2257 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
2258 int r;
2259
2260 assert(s);
2261
2262 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2263 /* Don't restart things if we are going down anyway */
2264 log_info_unit(UNIT(s)->id,
2265 "Stop job pending for unit, delaying automatic restart.");
2266
2267 r = service_arm_timer(s, s->restart_usec);
2268 if (r < 0)
2269 goto fail;
2270
2271 return;
2272 }
2273
2274 /* Any units that are bound to this service must also be
2275 * restarted. We use JOB_RESTART (instead of the more obvious
2276 * JOB_START) here so that those dependency jobs will be added
2277 * as well. */
2278 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
2279 if (r < 0)
2280 goto fail;
2281
2282 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2283 * it will be canceled as part of the service_stop() call that
2284 * is executed as part of JOB_RESTART. */
2285
2286 log_debug_unit(UNIT(s)->id,
2287 "%s scheduled restart job.", UNIT(s)->id);
2288 return;
2289
2290 fail:
2291 log_warning_unit(UNIT(s)->id,
2292 "%s failed to schedule restart job: %s",
2293 UNIT(s)->id, bus_error_message(&error, -r));
2294 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2295 }
2296
2297 static void service_enter_reload(Service *s) {
2298 int r;
2299
2300 assert(s);
2301
2302 service_unwatch_control_pid(s);
2303
2304 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2305 if (s->control_command) {
2306 s->control_command_id = SERVICE_EXEC_RELOAD;
2307
2308 r = service_spawn(s,
2309 s->control_command,
2310 true,
2311 false,
2312 !s->permissions_start_only,
2313 !s->root_directory_start_only,
2314 false,
2315 false,
2316 true,
2317 &s->control_pid);
2318 if (r < 0)
2319 goto fail;
2320
2321 service_set_state(s, SERVICE_RELOAD);
2322 } else
2323 service_enter_running(s, SERVICE_SUCCESS);
2324
2325 return;
2326
2327 fail:
2328 log_warning_unit(UNIT(s)->id,
2329 "%s failed to run 'reload' task: %s",
2330 UNIT(s)->id, strerror(-r));
2331 s->reload_result = SERVICE_FAILURE_RESOURCES;
2332 service_enter_running(s, SERVICE_SUCCESS);
2333 }
2334
2335 static void service_run_next_control(Service *s) {
2336 int r;
2337
2338 assert(s);
2339 assert(s->control_command);
2340 assert(s->control_command->command_next);
2341
2342 assert(s->control_command_id != SERVICE_EXEC_START);
2343
2344 s->control_command = s->control_command->command_next;
2345 service_unwatch_control_pid(s);
2346
2347 r = service_spawn(s,
2348 s->control_command,
2349 true,
2350 false,
2351 !s->permissions_start_only,
2352 !s->root_directory_start_only,
2353 s->control_command_id == SERVICE_EXEC_START_PRE ||
2354 s->control_command_id == SERVICE_EXEC_STOP_POST,
2355 false,
2356 true,
2357 &s->control_pid);
2358 if (r < 0)
2359 goto fail;
2360
2361 return;
2362
2363 fail:
2364 log_warning_unit(UNIT(s)->id,
2365 "%s failed to run next control task: %s",
2366 UNIT(s)->id, strerror(-r));
2367
2368 if (s->state == SERVICE_START_PRE)
2369 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2370 else if (s->state == SERVICE_STOP)
2371 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2372 else if (s->state == SERVICE_STOP_POST)
2373 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2374 else if (s->state == SERVICE_RELOAD) {
2375 s->reload_result = SERVICE_FAILURE_RESOURCES;
2376 service_enter_running(s, SERVICE_SUCCESS);
2377 } else
2378 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2379 }
2380
2381 static void service_run_next_main(Service *s) {
2382 pid_t pid;
2383 int r;
2384
2385 assert(s);
2386 assert(s->main_command);
2387 assert(s->main_command->command_next);
2388 assert(s->type == SERVICE_ONESHOT);
2389
2390 s->main_command = s->main_command->command_next;
2391 service_unwatch_main_pid(s);
2392
2393 r = service_spawn(s,
2394 s->main_command,
2395 true,
2396 true,
2397 true,
2398 true,
2399 true,
2400 s->notify_access != NOTIFY_NONE,
2401 false,
2402 &pid);
2403 if (r < 0)
2404 goto fail;
2405
2406 service_set_main_pid(s, pid);
2407
2408 return;
2409
2410 fail:
2411 log_warning_unit(UNIT(s)->id,
2412 "%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2413 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2414 }
2415
2416 static int service_start_limit_test(Service *s) {
2417 assert(s);
2418
2419 if (ratelimit_test(&s->start_limit))
2420 return 0;
2421
2422 switch (s->start_limit_action) {
2423
2424 case SERVICE_START_LIMIT_NONE:
2425 log_warning_unit(UNIT(s)->id,
2426 "%s start request repeated too quickly, refusing to start.",
2427 UNIT(s)->id);
2428 break;
2429
2430 case SERVICE_START_LIMIT_REBOOT: {
2431 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
2432 int r;
2433
2434 log_warning_unit(UNIT(s)->id,
2435 "%s start request repeated too quickly, rebooting.", UNIT(s)->id);
2436
2437 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START,
2438 SPECIAL_REBOOT_TARGET, JOB_REPLACE,
2439 true, &error, NULL);
2440 if (r < 0)
2441 log_error_unit(UNIT(s)->id,
2442 "Failed to reboot: %s.", bus_error_message(&error, r));
2443
2444 break;
2445 }
2446
2447 case SERVICE_START_LIMIT_REBOOT_FORCE:
2448 log_warning_unit(UNIT(s)->id,
2449 "%s start request repeated too quickly, forcibly rebooting.", UNIT(s)->id);
2450 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2451 break;
2452
2453 case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
2454 log_warning_unit(UNIT(s)->id,
2455 "%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
2456 sync();
2457 reboot(RB_AUTOBOOT);
2458 break;
2459
2460 default:
2461 log_error_unit(UNIT(s)->id,
2462 "start limit action=%i", s->start_limit_action);
2463 assert_not_reached("Unknown StartLimitAction.");
2464 }
2465
2466 return -ECANCELED;
2467 }
2468
2469 static int service_start(Unit *u) {
2470 Service *s = SERVICE(u);
2471 int r;
2472
2473 assert(s);
2474
2475 /* We cannot fulfill this request right now, try again later
2476 * please! */
2477 if (s->state == SERVICE_STOP ||
2478 s->state == SERVICE_STOP_SIGTERM ||
2479 s->state == SERVICE_STOP_SIGKILL ||
2480 s->state == SERVICE_STOP_POST ||
2481 s->state == SERVICE_FINAL_SIGTERM ||
2482 s->state == SERVICE_FINAL_SIGKILL)
2483 return -EAGAIN;
2484
2485 /* Already on it! */
2486 if (s->state == SERVICE_START_PRE ||
2487 s->state == SERVICE_START ||
2488 s->state == SERVICE_START_POST)
2489 return 0;
2490
2491 /* A service that will be restarted must be stopped first to
2492 * trigger BindsTo and/or OnFailure dependencies. If a user
2493 * does not want to wait for the holdoff time to elapse, the
2494 * service should be manually restarted, not started. We
2495 * simply return EAGAIN here, so that any start jobs stay
2496 * queued, and assume that the auto restart timer will
2497 * eventually trigger the restart. */
2498 if (s->state == SERVICE_AUTO_RESTART)
2499 return -EAGAIN;
2500
2501 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
2502
2503 /* Make sure we don't enter a busy loop of some kind. */
2504 r = service_start_limit_test(s);
2505 if (r < 0) {
2506 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
2507 return r;
2508 }
2509
2510 s->result = SERVICE_SUCCESS;
2511 s->reload_result = SERVICE_SUCCESS;
2512 s->main_pid_known = false;
2513 s->main_pid_alien = false;
2514 s->forbid_restart = false;
2515
2516 service_enter_start_pre(s);
2517 return 0;
2518 }
2519
2520 static int service_stop(Unit *u) {
2521 Service *s = SERVICE(u);
2522
2523 assert(s);
2524
2525 /* Don't create restart jobs from here. */
2526 s->forbid_restart = true;
2527
2528 /* Already on it */
2529 if (s->state == SERVICE_STOP ||
2530 s->state == SERVICE_STOP_SIGTERM ||
2531 s->state == SERVICE_STOP_SIGKILL ||
2532 s->state == SERVICE_STOP_POST ||
2533 s->state == SERVICE_FINAL_SIGTERM ||
2534 s->state == SERVICE_FINAL_SIGKILL)
2535 return 0;
2536
2537 /* A restart will be scheduled or is in progress. */
2538 if (s->state == SERVICE_AUTO_RESTART) {
2539 service_set_state(s, SERVICE_DEAD);
2540 return 0;
2541 }
2542
2543 /* If there's already something running we go directly into
2544 * kill mode. */
2545 if (s->state == SERVICE_START_PRE ||
2546 s->state == SERVICE_START ||
2547 s->state == SERVICE_START_POST ||
2548 s->state == SERVICE_RELOAD) {
2549 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2550 return 0;
2551 }
2552
2553 assert(s->state == SERVICE_RUNNING ||
2554 s->state == SERVICE_EXITED);
2555
2556 service_enter_stop(s, SERVICE_SUCCESS);
2557 return 0;
2558 }
2559
2560 static int service_reload(Unit *u) {
2561 Service *s = SERVICE(u);
2562
2563 assert(s);
2564
2565 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2566
2567 service_enter_reload(s);
2568 return 0;
2569 }
2570
2571 _pure_ static bool service_can_reload(Unit *u) {
2572 Service *s = SERVICE(u);
2573
2574 assert(s);
2575
2576 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2577 }
2578
2579 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2580 Service *s = SERVICE(u);
2581
2582 assert(u);
2583 assert(f);
2584 assert(fds);
2585
2586 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2587 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2588 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2589
2590 if (s->control_pid > 0)
2591 unit_serialize_item_format(u, f, "control-pid", "%lu",
2592 (unsigned long) s->control_pid);
2593
2594 if (s->main_pid_known && s->main_pid > 0)
2595 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2596
2597 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2598
2599 if (s->status_text)
2600 unit_serialize_item(u, f, "status-text", s->status_text);
2601
2602 /* FIXME: There's a minor uncleanliness here: if there are
2603 * multiple commands attached here, we will start from the
2604 * first one again */
2605 if (s->control_command_id >= 0)
2606 unit_serialize_item(u, f, "control-command",
2607 service_exec_command_to_string(s->control_command_id));
2608
2609 if (s->socket_fd >= 0) {
2610 int copy;
2611
2612 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2613 return copy;
2614
2615 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2616 }
2617
2618 if (s->main_exec_status.pid > 0) {
2619 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu",
2620 (unsigned long) s->main_exec_status.pid);
2621 dual_timestamp_serialize(f, "main-exec-status-start",
2622 &s->main_exec_status.start_timestamp);
2623 dual_timestamp_serialize(f, "main-exec-status-exit",
2624 &s->main_exec_status.exit_timestamp);
2625
2626 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2627 unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
2628 s->main_exec_status.code);
2629 unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
2630 s->main_exec_status.status);
2631 }
2632 }
2633 if (dual_timestamp_is_set(&s->watchdog_timestamp))
2634 dual_timestamp_serialize(f, "watchdog-timestamp",
2635 &s->watchdog_timestamp);
2636
2637 if (s->exec_context.tmp_dir)
2638 unit_serialize_item(u, f, "tmp-dir", s->exec_context.tmp_dir);
2639
2640 if (s->exec_context.var_tmp_dir)
2641 unit_serialize_item(u, f, "var-tmp-dir", s->exec_context.var_tmp_dir);
2642
2643 if (s->forbid_restart)
2644 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2645
2646 return 0;
2647 }
2648
2649 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2650 Service *s = SERVICE(u);
2651
2652 assert(u);
2653 assert(key);
2654 assert(value);
2655 assert(fds);
2656
2657 if (streq(key, "state")) {
2658 ServiceState state;
2659
2660 state = service_state_from_string(value);
2661 if (state < 0)
2662 log_debug_unit(u->id, "Failed to parse state value %s", value);
2663 else
2664 s->deserialized_state = state;
2665 } else if (streq(key, "result")) {
2666 ServiceResult f;
2667
2668 f = service_result_from_string(value);
2669 if (f < 0)
2670 log_debug_unit(u->id, "Failed to parse result value %s", value);
2671 else if (f != SERVICE_SUCCESS)
2672 s->result = f;
2673
2674 } else if (streq(key, "reload-result")) {
2675 ServiceResult f;
2676
2677 f = service_result_from_string(value);
2678 if (f < 0)
2679 log_debug_unit(u->id, "Failed to parse reload result value %s", value);
2680 else if (f != SERVICE_SUCCESS)
2681 s->reload_result = f;
2682
2683 } else if (streq(key, "control-pid")) {
2684 pid_t pid;
2685
2686 if (parse_pid(value, &pid) < 0)
2687 log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
2688 else
2689 s->control_pid = pid;
2690 } else if (streq(key, "main-pid")) {
2691 pid_t pid;
2692
2693 if (parse_pid(value, &pid) < 0)
2694 log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
2695 else {
2696 service_set_main_pid(s, pid);
2697 unit_watch_pid(UNIT(s), pid);
2698 }
2699 } else if (streq(key, "main-pid-known")) {
2700 int b;
2701
2702 b = parse_boolean(value);
2703 if (b < 0)
2704 log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
2705 else
2706 s->main_pid_known = b;
2707 } else if (streq(key, "status-text")) {
2708 char *t;
2709
2710 t = strdup(value);
2711 if (!t)
2712 log_oom();
2713 else {
2714 free(s->status_text);
2715 s->status_text = t;
2716 }
2717
2718 } else if (streq(key, "control-command")) {
2719 ServiceExecCommand id;
2720
2721 id = service_exec_command_from_string(value);
2722 if (id < 0)
2723 log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
2724 else {
2725 s->control_command_id = id;
2726 s->control_command = s->exec_command[id];
2727 }
2728 } else if (streq(key, "socket-fd")) {
2729 int fd;
2730
2731 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2732 log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
2733 else {
2734
2735 if (s->socket_fd >= 0)
2736 close_nointr_nofail(s->socket_fd);
2737 s->socket_fd = fdset_remove(fds, fd);
2738 }
2739 } else if (streq(key, "main-exec-status-pid")) {
2740 pid_t pid;
2741
2742 if (parse_pid(value, &pid) < 0)
2743 log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
2744 else
2745 s->main_exec_status.pid = pid;
2746 } else if (streq(key, "main-exec-status-code")) {
2747 int i;
2748
2749 if (safe_atoi(value, &i) < 0)
2750 log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
2751 else
2752 s->main_exec_status.code = i;
2753 } else if (streq(key, "main-exec-status-status")) {
2754 int i;
2755
2756 if (safe_atoi(value, &i) < 0)
2757 log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
2758 else
2759 s->main_exec_status.status = i;
2760 } else if (streq(key, "main-exec-status-start"))
2761 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2762 else if (streq(key, "main-exec-status-exit"))
2763 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2764 else if (streq(key, "watchdog-timestamp"))
2765 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2766 else if (streq(key, "tmp-dir")) {
2767 char *t;
2768
2769 t = strdup(value);
2770 if (!t)
2771 return log_oom();
2772
2773 s->exec_context.tmp_dir = t;
2774 } else if (streq(key, "var-tmp-dir")) {
2775 char *t;
2776
2777 t = strdup(value);
2778 if (!t)
2779 return log_oom();
2780
2781 s->exec_context.var_tmp_dir = t;
2782 } else if (streq(key, "forbid-restart")) {
2783 int b;
2784
2785 b = parse_boolean(value);
2786 if (b < 0)
2787 log_debug_unit(u->id, "Failed to parse forbid-restart value %s", value);
2788 else
2789 s->forbid_restart = b;
2790 } else
2791 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
2792
2793 return 0;
2794 }
2795
2796 _pure_ static UnitActiveState service_active_state(Unit *u) {
2797 const UnitActiveState *table;
2798
2799 assert(u);
2800
2801 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2802
2803 return table[SERVICE(u)->state];
2804 }
2805
2806 static const char *service_sub_state_to_string(Unit *u) {
2807 assert(u);
2808
2809 return service_state_to_string(SERVICE(u)->state);
2810 }
2811
2812 static bool service_check_gc(Unit *u) {
2813 Service *s = SERVICE(u);
2814
2815 assert(s);
2816
2817 /* Never clean up services that still have a process around,
2818 * even if the service is formally dead. */
2819 if (cgroup_good(s) > 0 ||
2820 main_pid_good(s) > 0 ||
2821 control_pid_good(s) > 0)
2822 return true;
2823
2824 #ifdef HAVE_SYSV_COMPAT
2825 if (s->is_sysv)
2826 return true;
2827 #endif
2828
2829 return false;
2830 }
2831
2832 _pure_ static bool service_check_snapshot(Unit *u) {
2833 Service *s = SERVICE(u);
2834
2835 assert(s);
2836
2837 return !s->got_socket_fd;
2838 }
2839
2840 static int service_retry_pid_file(Service *s) {
2841 int r;
2842
2843 assert(s->pid_file);
2844 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2845
2846 r = service_load_pid_file(s, false);
2847 if (r < 0)
2848 return r;
2849
2850 service_unwatch_pid_file(s);
2851
2852 service_enter_running(s, SERVICE_SUCCESS);
2853 return 0;
2854 }
2855
2856 static int service_watch_pid_file(Service *s) {
2857 int r;
2858
2859 log_debug_unit(UNIT(s)->id,
2860 "Setting watch for %s's PID file %s",
2861 UNIT(s)->id, s->pid_file_pathspec->path);
2862 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2863 if (r < 0)
2864 goto fail;
2865
2866 /* the pidfile might have appeared just before we set the watch */
2867 log_debug_unit(UNIT(s)->id,
2868 "Trying to read %s's PID file %s in case it changed",
2869 UNIT(s)->id, s->pid_file_pathspec->path);
2870 service_retry_pid_file(s);
2871
2872 return 0;
2873 fail:
2874 log_error_unit(UNIT(s)->id,
2875 "Failed to set a watch for %s's PID file %s: %s",
2876 UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2877 service_unwatch_pid_file(s);
2878 return r;
2879 }
2880
2881 static int service_demand_pid_file(Service *s) {
2882 PathSpec *ps;
2883
2884 assert(s->pid_file);
2885 assert(!s->pid_file_pathspec);
2886
2887 ps = new0(PathSpec, 1);
2888 if (!ps)
2889 return -ENOMEM;
2890
2891 ps->unit = UNIT(s);
2892 ps->path = strdup(s->pid_file);
2893 if (!ps->path) {
2894 free(ps);
2895 return -ENOMEM;
2896 }
2897
2898 path_kill_slashes(ps->path);
2899
2900 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2901 * keep their PID file open all the time. */
2902 ps->type = PATH_MODIFIED;
2903 ps->inotify_fd = -1;
2904
2905 s->pid_file_pathspec = ps;
2906
2907 return service_watch_pid_file(s);
2908 }
2909
2910 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2911 Service *s = SERVICE(userdata);
2912
2913 assert(s);
2914 assert(fd >= 0);
2915 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2916 assert(s->pid_file_pathspec);
2917 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2918
2919 log_debug_unit(UNIT(s)->id, "inotify event for %s", UNIT(s)->id);
2920
2921 if (path_spec_fd_event(s->pid_file_pathspec, events) < 0)
2922 goto fail;
2923
2924 if (service_retry_pid_file(s) == 0)
2925 return 0;
2926
2927 if (service_watch_pid_file(s) < 0)
2928 goto fail;
2929
2930 return 0;
2931
2932 fail:
2933 service_unwatch_pid_file(s);
2934 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2935 return 0;
2936 }
2937
2938 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2939 Service *s = SERVICE(u);
2940 ServiceResult f;
2941
2942 assert(s);
2943 assert(pid >= 0);
2944
2945 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2946 is_clean_exit_lsb(code, status, &s->success_status))
2947 f = SERVICE_SUCCESS;
2948 else if (code == CLD_EXITED)
2949 f = SERVICE_FAILURE_EXIT_CODE;
2950 else if (code == CLD_KILLED)
2951 f = SERVICE_FAILURE_SIGNAL;
2952 else if (code == CLD_DUMPED)
2953 f = SERVICE_FAILURE_CORE_DUMP;
2954 else
2955 assert_not_reached("Unknown code");
2956
2957 if (s->main_pid == pid) {
2958 /* Forking services may occasionally move to a new PID.
2959 * As long as they update the PID file before exiting the old
2960 * PID, they're fine. */
2961 if (service_load_pid_file(s, false) == 0)
2962 return;
2963
2964 s->main_pid = 0;
2965 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2966
2967 if (s->main_command) {
2968 /* If this is not a forking service than the
2969 * main process got started and hence we copy
2970 * the exit status so that it is recorded both
2971 * as main and as control process exit
2972 * status */
2973
2974 s->main_command->exec_status = s->main_exec_status;
2975
2976 if (s->main_command->ignore)
2977 f = SERVICE_SUCCESS;
2978 } else if (s->exec_command[SERVICE_EXEC_START]) {
2979
2980 /* If this is a forked process, then we should
2981 * ignore the return value if this was
2982 * configured for the starter process */
2983
2984 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2985 f = SERVICE_SUCCESS;
2986 }
2987
2988 log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2989 u->id,
2990 "MESSAGE=%s: main process exited, code=%s, status=%i/%s",
2991 u->id, sigchld_code_to_string(code), status,
2992 strna(code == CLD_EXITED
2993 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2994 : signal_to_string(status)),
2995 "EXIT_CODE=%s", sigchld_code_to_string(code),
2996 "EXIT_STATUS=%i", status,
2997 NULL);
2998
2999 if (f != SERVICE_SUCCESS)
3000 s->result = f;
3001
3002 if (s->main_command &&
3003 s->main_command->command_next &&
3004 f == SERVICE_SUCCESS) {
3005
3006 /* There is another command to *
3007 * execute, so let's do that. */
3008
3009 log_debug_unit(u->id,
3010 "%s running next main command for state %s",
3011 u->id, service_state_to_string(s->state));
3012 service_run_next_main(s);
3013
3014 } else {
3015
3016 /* The service exited, so the service is officially
3017 * gone. */
3018 s->main_command = NULL;
3019
3020 switch (s->state) {
3021
3022 case SERVICE_START_POST:
3023 case SERVICE_RELOAD:
3024 case SERVICE_STOP:
3025 /* Need to wait until the operation is
3026 * done */
3027 break;
3028
3029 case SERVICE_START:
3030 if (s->type == SERVICE_ONESHOT) {
3031 /* This was our main goal, so let's go on */
3032 if (f == SERVICE_SUCCESS)
3033 service_enter_start_post(s);
3034 else
3035 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3036 break;
3037 }
3038
3039 /* Fall through */
3040
3041 case SERVICE_RUNNING:
3042 service_enter_running(s, f);
3043 break;
3044
3045 case SERVICE_STOP_SIGTERM:
3046 case SERVICE_STOP_SIGKILL:
3047
3048 if (!control_pid_good(s))
3049 service_enter_stop_post(s, f);
3050
3051 /* If there is still a control process, wait for that first */
3052 break;
3053
3054 default:
3055 assert_not_reached("Uh, main process died at wrong time.");
3056 }
3057 }
3058
3059 } else if (s->control_pid == pid) {
3060 s->control_pid = 0;
3061
3062 if (s->control_command) {
3063 exec_status_exit(&s->control_command->exec_status,
3064 &s->exec_context, pid, code, status);
3065
3066 if (s->control_command->ignore)
3067 f = SERVICE_SUCCESS;
3068 }
3069
3070 log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
3071 "%s: control process exited, code=%s status=%i",
3072 u->id, sigchld_code_to_string(code), status);
3073
3074 if (f != SERVICE_SUCCESS)
3075 s->result = f;
3076
3077 /* Immediately get rid of the cgroup, so that the
3078 * kernel doesn't delay the cgroup empty messages for
3079 * the service cgroup any longer than necessary */
3080 service_kill_control_processes(s);
3081
3082 if (s->control_command &&
3083 s->control_command->command_next &&
3084 f == SERVICE_SUCCESS) {
3085
3086 /* There is another command to *
3087 * execute, so let's do that. */
3088
3089 log_debug_unit(u->id,
3090 "%s running next control command for state %s",
3091 u->id, service_state_to_string(s->state));
3092 service_run_next_control(s);
3093
3094 } else {
3095 /* No further commands for this step, so let's
3096 * figure out what to do next */
3097
3098 s->control_command = NULL;
3099 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3100
3101 log_debug_unit(u->id,
3102 "%s got final SIGCHLD for state %s",
3103 u->id, service_state_to_string(s->state));
3104
3105 switch (s->state) {
3106
3107 case SERVICE_START_PRE:
3108 if (f == SERVICE_SUCCESS)
3109 service_enter_start(s);
3110 else
3111 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3112 break;
3113
3114 case SERVICE_START:
3115 if (s->type != SERVICE_FORKING)
3116 /* Maybe spurious event due to a reload that changed the type? */
3117 break;
3118
3119 if (f != SERVICE_SUCCESS) {
3120 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3121 break;
3122 }
3123
3124 if (s->pid_file) {
3125 bool has_start_post;
3126 int r;
3127
3128 /* Let's try to load the pid file here if we can.
3129 * The PID file might actually be created by a START_POST
3130 * script. In that case don't worry if the loading fails. */
3131
3132 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3133 r = service_load_pid_file(s, !has_start_post);
3134 if (!has_start_post && r < 0) {
3135 r = service_demand_pid_file(s);
3136 if (r < 0 || !cgroup_good(s))
3137 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3138 break;
3139 }
3140 } else
3141 service_search_main_pid(s);
3142
3143 service_enter_start_post(s);
3144 break;
3145
3146 case SERVICE_START_POST:
3147 if (f != SERVICE_SUCCESS) {
3148 service_enter_stop(s, f);
3149 break;
3150 }
3151
3152 if (s->pid_file) {
3153 int r;
3154
3155 r = service_load_pid_file(s, true);
3156 if (r < 0) {
3157 r = service_demand_pid_file(s);
3158 if (r < 0 || !cgroup_good(s))
3159 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3160 break;
3161 }
3162 } else
3163 service_search_main_pid(s);
3164
3165 service_enter_running(s, SERVICE_SUCCESS);
3166 break;
3167
3168 case SERVICE_RELOAD:
3169 if (f == SERVICE_SUCCESS) {
3170 service_load_pid_file(s, true);
3171 service_search_main_pid(s);
3172 }
3173
3174 s->reload_result = f;
3175 service_enter_running(s, SERVICE_SUCCESS);
3176 break;
3177
3178 case SERVICE_STOP:
3179 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3180 break;
3181
3182 case SERVICE_STOP_SIGTERM:
3183 case SERVICE_STOP_SIGKILL:
3184 if (main_pid_good(s) <= 0)
3185 service_enter_stop_post(s, f);
3186
3187 /* If there is still a service
3188 * process around, wait until
3189 * that one quit, too */
3190 break;
3191
3192 case SERVICE_STOP_POST:
3193 case SERVICE_FINAL_SIGTERM:
3194 case SERVICE_FINAL_SIGKILL:
3195 service_enter_dead(s, f, true);
3196 break;
3197
3198 default:
3199 assert_not_reached("Uh, control process died at wrong time.");
3200 }
3201 }
3202 }
3203
3204 /* Notify clients about changed exit status */
3205 unit_add_to_dbus_queue(u);
3206 }
3207
3208 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3209 Service *s = SERVICE(userdata);
3210
3211 assert(s);
3212 assert(source == s->timer_event_source);
3213
3214 switch (s->state) {
3215
3216 case SERVICE_START_PRE:
3217 case SERVICE_START:
3218 log_warning_unit(UNIT(s)->id,
3219 "%s operation timed out. Terminating.", UNIT(s)->id);
3220 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3221 break;
3222
3223 case SERVICE_START_POST:
3224 log_warning_unit(UNIT(s)->id,
3225 "%s operation timed out. Stopping.", UNIT(s)->id);
3226 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3227 break;
3228
3229 case SERVICE_RELOAD:
3230 log_warning_unit(UNIT(s)->id,
3231 "%s operation timed out. Stopping.", UNIT(s)->id);
3232 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3233 service_enter_running(s, SERVICE_SUCCESS);
3234 break;
3235
3236 case SERVICE_STOP:
3237 log_warning_unit(UNIT(s)->id,
3238 "%s stopping timed out. Terminating.", UNIT(s)->id);
3239 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3240 break;
3241
3242 case SERVICE_STOP_SIGTERM:
3243 if (s->kill_context.send_sigkill) {
3244 log_warning_unit(UNIT(s)->id,
3245 "%s stopping timed out. Killing.", UNIT(s)->id);
3246 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3247 } else {
3248 log_warning_unit(UNIT(s)->id,
3249 "%s stopping timed out. Skipping SIGKILL.", UNIT(s)->id);
3250 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3251 }
3252
3253 break;
3254
3255 case SERVICE_STOP_SIGKILL:
3256 /* Uh, we sent a SIGKILL and it is still not gone?
3257 * Must be something we cannot kill, so let's just be
3258 * weirded out and continue */
3259
3260 log_warning_unit(UNIT(s)->id,
3261 "%s still around after SIGKILL. Ignoring.", UNIT(s)->id);
3262 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3263 break;
3264
3265 case SERVICE_STOP_POST:
3266 log_warning_unit(UNIT(s)->id,
3267 "%s stopping timed out (2). Terminating.", UNIT(s)->id);
3268 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3269 break;
3270
3271 case SERVICE_FINAL_SIGTERM:
3272 if (s->kill_context.send_sigkill) {
3273 log_warning_unit(UNIT(s)->id,
3274 "%s stopping timed out (2). Killing.", UNIT(s)->id);
3275 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3276 } else {
3277 log_warning_unit(UNIT(s)->id,
3278 "%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.",
3279 UNIT(s)->id);
3280 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3281 }
3282
3283 break;
3284
3285 case SERVICE_FINAL_SIGKILL:
3286 log_warning_unit(UNIT(s)->id,
3287 "%s still around after SIGKILL (2). Entering failed mode.", UNIT(s)->id);
3288 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3289 break;
3290
3291 case SERVICE_AUTO_RESTART:
3292 log_info_unit(UNIT(s)->id,
3293 "%s holdoff time over, scheduling restart.", UNIT(s)->id);
3294 service_enter_restart(s);
3295 break;
3296
3297 default:
3298 assert_not_reached("Timeout at wrong time.");
3299 }
3300
3301 return 0;
3302 }
3303
3304 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3305 Service *s = SERVICE(userdata);
3306
3307 assert(s);
3308 assert(source == s->watchdog_event_source);
3309
3310 service_handle_watchdog(s);
3311 return 0;
3312 }
3313
3314 static void service_notify_cgroup_empty_event(Unit *u) {
3315 Service *s = SERVICE(u);
3316
3317 assert(u);
3318
3319 log_debug_unit(u->id, "%s: cgroup is empty", u->id);
3320
3321 switch (s->state) {
3322
3323 /* Waiting for SIGCHLD is usually more interesting,
3324 * because it includes return codes/signals. Which is
3325 * why we ignore the cgroup events for most cases,
3326 * except when we don't know pid which to expect the
3327 * SIGCHLD for. */
3328
3329 case SERVICE_START:
3330 case SERVICE_START_POST:
3331 /* If we were hoping for the daemon to write its PID file,
3332 * we can give up now. */
3333 if (s->pid_file_pathspec) {
3334 log_warning_unit(u->id,
3335 "%s never wrote its PID file. Failing.", UNIT(s)->id);
3336 service_unwatch_pid_file(s);
3337 if (s->state == SERVICE_START)
3338 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3339 else
3340 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3341 }
3342 break;
3343
3344 case SERVICE_RUNNING:
3345 /* service_enter_running() will figure out what to do */
3346 service_enter_running(s, SERVICE_SUCCESS);
3347 break;
3348
3349 case SERVICE_STOP_SIGTERM:
3350 case SERVICE_STOP_SIGKILL:
3351
3352 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3353 service_enter_stop_post(s, SERVICE_SUCCESS);
3354
3355 break;
3356
3357 case SERVICE_FINAL_SIGTERM:
3358 case SERVICE_FINAL_SIGKILL:
3359 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3360 service_enter_dead(s, SERVICE_SUCCESS, true);
3361
3362 break;
3363
3364 default:
3365 ;
3366 }
3367 }
3368
3369 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3370 Service *s = SERVICE(u);
3371 const char *e;
3372
3373 assert(u);
3374
3375 if (s->notify_access == NOTIFY_NONE) {
3376 log_warning_unit(u->id,
3377 "%s: Got notification message from PID %lu, but reception is disabled.",
3378 u->id, (unsigned long) pid);
3379 return;
3380 }
3381
3382 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3383 log_warning_unit(u->id,
3384 "%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3385 u->id, (unsigned long) pid, (unsigned long) s->main_pid);
3386 return;
3387 }
3388
3389 log_debug_unit(u->id,
3390 "%s: Got message", u->id);
3391
3392 /* Interpret MAINPID= */
3393 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3394 (s->state == SERVICE_START ||
3395 s->state == SERVICE_START_POST ||
3396 s->state == SERVICE_RUNNING ||
3397 s->state == SERVICE_RELOAD)) {
3398
3399 if (parse_pid(e + 8, &pid) < 0)
3400 log_warning_unit(u->id,
3401 "Failed to parse notification message %s", e);
3402 else {
3403 log_debug_unit(u->id,
3404 "%s: got %s", u->id, e);
3405 service_set_main_pid(s, pid);
3406 unit_watch_pid(UNIT(s), pid);
3407 }
3408 }
3409
3410 /* Interpret READY= */
3411 if (s->type == SERVICE_NOTIFY &&
3412 s->state == SERVICE_START &&
3413 strv_find(tags, "READY=1")) {
3414 log_debug_unit(u->id,
3415 "%s: got READY=1", u->id);
3416
3417 service_enter_start_post(s);
3418 }
3419
3420 /* Interpret STATUS= */
3421 e = strv_find_prefix(tags, "STATUS=");
3422 if (e) {
3423 char *t;
3424
3425 if (e[7]) {
3426
3427 if (!utf8_is_valid(e+7)) {
3428 log_warning_unit(u->id,
3429 "Status message in notification is not UTF-8 clean.");
3430 return;
3431 }
3432
3433 t = strdup(e+7);
3434 if (!t) {
3435 log_error_unit(u->id,
3436 "Failed to allocate string.");
3437 return;
3438 }
3439
3440 log_debug_unit(u->id,
3441 "%s: got %s", u->id, e);
3442
3443 free(s->status_text);
3444 s->status_text = t;
3445 } else {
3446 free(s->status_text);
3447 s->status_text = NULL;
3448 }
3449
3450 }
3451 if (strv_find(tags, "WATCHDOG=1")) {
3452 log_debug_unit(u->id,
3453 "%s: got WATCHDOG=1", u->id);
3454 if (dual_timestamp_is_set(&s->watchdog_timestamp))
3455 service_reset_watchdog(s);
3456 }
3457
3458 /* Notify clients about changed status or main pid */
3459 unit_add_to_dbus_queue(u);
3460 }
3461
3462 #ifdef HAVE_SYSV_COMPAT
3463
3464 static int service_enumerate(Manager *m) {
3465 char **p;
3466 unsigned i;
3467 _cleanup_closedir_ DIR *d = NULL;
3468 _cleanup_free_ char *path = NULL, *fpath = NULL, *name = NULL;
3469 Set *runlevel_services[ELEMENTSOF(rcnd_table)] = {};
3470 _cleanup_set_free_ Set *shutdown_services = NULL;
3471 Unit *service;
3472 Iterator j;
3473 int r;
3474
3475 assert(m);
3476
3477 if (m->running_as != SYSTEMD_SYSTEM)
3478 return 0;
3479
3480 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3481 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3482 struct dirent *de;
3483
3484 free(path);
3485 path = strjoin(*p, "/", rcnd_table[i].path, NULL);
3486 if (!path) {
3487 r = -ENOMEM;
3488 goto finish;
3489 }
3490
3491 if (d)
3492 closedir(d);
3493
3494 d = opendir(path);
3495 if (!d) {
3496 if (errno != ENOENT)
3497 log_warning("opendir(%s) failed: %s", path, strerror(errno));
3498
3499 continue;
3500 }
3501
3502 while ((de = readdir(d))) {
3503 int a, b;
3504
3505 if (ignore_file(de->d_name))
3506 continue;
3507
3508 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3509 continue;
3510
3511 if (strlen(de->d_name) < 4)
3512 continue;
3513
3514 a = undecchar(de->d_name[1]);
3515 b = undecchar(de->d_name[2]);
3516
3517 if (a < 0 || b < 0)
3518 continue;
3519
3520 free(fpath);
3521 fpath = strjoin(path, "/", de->d_name, NULL);
3522 if (!fpath) {
3523 r = -ENOMEM;
3524 goto finish;
3525 }
3526
3527 if (access(fpath, X_OK) < 0) {
3528
3529 if (errno != ENOENT)
3530 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3531
3532 continue;
3533 }
3534
3535 free(name);
3536 name = sysv_translate_name(de->d_name + 3);
3537 if (!name) {
3538 r = log_oom();
3539 goto finish;
3540 }
3541
3542 r = manager_load_unit_prepare(m, name, NULL, NULL, &service);
3543 if (r < 0) {
3544 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3545 continue;
3546 }
3547
3548 if (de->d_name[0] == 'S') {
3549
3550 if (rcnd_table[i].type == RUNLEVEL_UP) {
3551 SERVICE(service)->sysv_start_priority_from_rcnd =
3552 MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3553
3554 SERVICE(service)->sysv_enabled = true;
3555 }
3556
3557 r = set_ensure_allocated(&runlevel_services[i],
3558 trivial_hash_func, trivial_compare_func);
3559 if (r < 0)
3560 goto finish;
3561
3562 r = set_put(runlevel_services[i], service);
3563 if (r < 0)
3564 goto finish;
3565
3566 } else if (de->d_name[0] == 'K' &&
3567 (rcnd_table[i].type == RUNLEVEL_DOWN)) {
3568
3569 r = set_ensure_allocated(&shutdown_services,
3570 trivial_hash_func, trivial_compare_func);
3571 if (r < 0)
3572 goto finish;
3573
3574 r = set_put(shutdown_services, service);
3575 if (r < 0)
3576 goto finish;
3577 }
3578 }
3579 }
3580
3581 /* Now we loaded all stubs and are aware of the lowest
3582 start-up priority for all services, not let's actually load
3583 the services, this will also tell us which services are
3584 actually native now */
3585 manager_dispatch_load_queue(m);
3586
3587 /* If this is a native service, rely on native ways to pull in
3588 * a service, don't pull it in via sysv rcN.d links. */
3589 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3590 SET_FOREACH(service, runlevel_services[i], j) {
3591 service = unit_follow_merge(service);
3592
3593 if (service->fragment_path)
3594 continue;
3595
3596 r = unit_add_two_dependencies_by_name_inverse(
3597 service, UNIT_AFTER, UNIT_WANTS,
3598 rcnd_table[i].target, NULL, true);
3599 if (r < 0)
3600 goto finish;
3601 }
3602
3603 /* We honour K links only for halt/reboot. For the normal
3604 * runlevels we assume the stop jobs will be implicitly added
3605 * by the core logic. Also, we don't really distinguish here
3606 * between the runlevels 0 and 6 and just add them to the
3607 * special shutdown target. */
3608 SET_FOREACH(service, shutdown_services, j) {
3609 service = unit_follow_merge(service);
3610
3611 if (service->fragment_path)
3612 continue;
3613
3614 r = unit_add_two_dependencies_by_name(
3615 service, UNIT_BEFORE, UNIT_CONFLICTS,
3616 SPECIAL_SHUTDOWN_TARGET, NULL, true);
3617 if (r < 0)
3618 goto finish;
3619 }
3620
3621 r = 0;
3622
3623 finish:
3624
3625 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3626 set_free(runlevel_services[i]);
3627
3628 return r;
3629 }
3630 #endif
3631
3632 static void service_bus_name_owner_change(
3633 Unit *u,
3634 const char *name,
3635 const char *old_owner,
3636 const char *new_owner) {
3637
3638 Service *s = SERVICE(u);
3639 int r;
3640
3641 assert(s);
3642 assert(name);
3643
3644 assert(streq(s->bus_name, name));
3645 assert(old_owner || new_owner);
3646
3647 if (old_owner && new_owner)
3648 log_debug_unit(u->id,
3649 "%s's D-Bus name %s changed owner from %s to %s",
3650 u->id, name, old_owner, new_owner);
3651 else if (old_owner)
3652 log_debug_unit(u->id,
3653 "%s's D-Bus name %s no longer registered by %s",
3654 u->id, name, old_owner);
3655 else
3656 log_debug_unit(u->id,
3657 "%s's D-Bus name %s now registered by %s",
3658 u->id, name, new_owner);
3659
3660 s->bus_name_good = !!new_owner;
3661
3662 if (s->type == SERVICE_DBUS) {
3663
3664 /* service_enter_running() will figure out what to
3665 * do */
3666 if (s->state == SERVICE_RUNNING)
3667 service_enter_running(s, SERVICE_SUCCESS);
3668 else if (s->state == SERVICE_START && new_owner)
3669 service_enter_start_post(s);
3670
3671 } else if (new_owner &&
3672 s->main_pid <= 0 &&
3673 (s->state == SERVICE_START ||
3674 s->state == SERVICE_START_POST ||
3675 s->state == SERVICE_RUNNING ||
3676 s->state == SERVICE_RELOAD)) {
3677
3678 pid_t pid;
3679
3680 /* Try to acquire PID from bus service */
3681
3682 r = sd_bus_get_owner_pid(u->manager->api_bus, name, &pid);
3683 if (r >= 0) {
3684 log_debug_unit(u->id, "%s's D-Bus name %s is now owned by process %u", u->id, name, (unsigned) pid);
3685
3686 service_set_main_pid(s, pid);
3687 unit_watch_pid(UNIT(s), pid);
3688 }
3689 }
3690 }
3691
3692 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3693
3694 assert(s);
3695 assert(fd >= 0);
3696
3697 /* This is called by the socket code when instantiating a new
3698 * service for a stream socket and the socket needs to be
3699 * configured. */
3700
3701 if (UNIT(s)->load_state != UNIT_LOADED)
3702 return -EINVAL;
3703
3704 if (s->socket_fd >= 0)
3705 return -EBUSY;
3706
3707 if (s->state != SERVICE_DEAD)
3708 return -EAGAIN;
3709
3710 s->socket_fd = fd;
3711 s->got_socket_fd = true;
3712
3713 unit_ref_set(&s->accept_socket, UNIT(sock));
3714
3715 return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3716 }
3717
3718 static void service_reset_failed(Unit *u) {
3719 Service *s = SERVICE(u);
3720
3721 assert(s);
3722
3723 if (s->state == SERVICE_FAILED)
3724 service_set_state(s, SERVICE_DEAD);
3725
3726 s->result = SERVICE_SUCCESS;
3727 s->reload_result = SERVICE_SUCCESS;
3728
3729 RATELIMIT_RESET(s->start_limit);
3730 }
3731
3732 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3733 Service *s = SERVICE(u);
3734
3735 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3736 }
3737
3738 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3739 [SERVICE_DEAD] = "dead",
3740 [SERVICE_START_PRE] = "start-pre",
3741 [SERVICE_START] = "start",
3742 [SERVICE_START_POST] = "start-post",
3743 [SERVICE_RUNNING] = "running",
3744 [SERVICE_EXITED] = "exited",
3745 [SERVICE_RELOAD] = "reload",
3746 [SERVICE_STOP] = "stop",
3747 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3748 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3749 [SERVICE_STOP_POST] = "stop-post",
3750 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3751 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3752 [SERVICE_FAILED] = "failed",
3753 [SERVICE_AUTO_RESTART] = "auto-restart",
3754 };
3755
3756 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3757
3758 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3759 [SERVICE_RESTART_NO] = "no",
3760 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3761 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3762 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3763 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3764 [SERVICE_RESTART_ALWAYS] = "always"
3765 };
3766
3767 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3768
3769 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3770 [SERVICE_SIMPLE] = "simple",
3771 [SERVICE_FORKING] = "forking",
3772 [SERVICE_ONESHOT] = "oneshot",
3773 [SERVICE_DBUS] = "dbus",
3774 [SERVICE_NOTIFY] = "notify",
3775 [SERVICE_IDLE] = "idle"
3776 };
3777
3778 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3779
3780 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3781 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3782 [SERVICE_EXEC_START] = "ExecStart",
3783 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3784 [SERVICE_EXEC_RELOAD] = "ExecReload",
3785 [SERVICE_EXEC_STOP] = "ExecStop",
3786 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3787 };
3788
3789 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3790
3791 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3792 [NOTIFY_NONE] = "none",
3793 [NOTIFY_MAIN] = "main",
3794 [NOTIFY_ALL] = "all"
3795 };
3796
3797 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3798
3799 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3800 [SERVICE_SUCCESS] = "success",
3801 [SERVICE_FAILURE_RESOURCES] = "resources",
3802 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3803 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3804 [SERVICE_FAILURE_SIGNAL] = "signal",
3805 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3806 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3807 [SERVICE_FAILURE_START_LIMIT] = "start-limit"
3808 };
3809
3810 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3811
3812 static const char* const start_limit_action_table[_SERVICE_START_LIMIT_MAX] = {
3813 [SERVICE_START_LIMIT_NONE] = "none",
3814 [SERVICE_START_LIMIT_REBOOT] = "reboot",
3815 [SERVICE_START_LIMIT_REBOOT_FORCE] = "reboot-force",
3816 [SERVICE_START_LIMIT_REBOOT_IMMEDIATE] = "reboot-immediate"
3817 };
3818 DEFINE_STRING_TABLE_LOOKUP(start_limit_action, StartLimitAction);
3819
3820 const UnitVTable service_vtable = {
3821 .object_size = sizeof(Service),
3822 .exec_context_offset = offsetof(Service, exec_context),
3823 .cgroup_context_offset = offsetof(Service, cgroup_context),
3824 .kill_context_offset = offsetof(Service, kill_context),
3825
3826 .sections =
3827 "Unit\0"
3828 "Service\0"
3829 "Install\0",
3830 .private_section = "Service",
3831
3832 .init = service_init,
3833 .done = service_done,
3834 .load = service_load,
3835
3836 .coldplug = service_coldplug,
3837
3838 .dump = service_dump,
3839
3840 .start = service_start,
3841 .stop = service_stop,
3842 .reload = service_reload,
3843
3844 .can_reload = service_can_reload,
3845
3846 .kill = service_kill,
3847
3848 .serialize = service_serialize,
3849 .deserialize_item = service_deserialize_item,
3850
3851 .active_state = service_active_state,
3852 .sub_state_to_string = service_sub_state_to_string,
3853
3854 .check_gc = service_check_gc,
3855 .check_snapshot = service_check_snapshot,
3856
3857 .sigchld_event = service_sigchld_event,
3858
3859 .reset_failed = service_reset_failed,
3860
3861 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3862 .notify_message = service_notify_message,
3863
3864 .bus_name_owner_change = service_bus_name_owner_change,
3865
3866 .bus_interface = "org.freedesktop.systemd1.Service",
3867 .bus_vtable = bus_service_vtable,
3868 .bus_changing_properties = bus_service_changing_properties,
3869 .bus_set_property = bus_service_set_property,
3870 .bus_commit_properties = bus_service_commit_properties,
3871
3872 #ifdef HAVE_SYSV_COMPAT
3873 .enumerate = service_enumerate,
3874 #endif
3875
3876 .can_transient = true,
3877
3878 .status_message_formats = {
3879 .starting_stopping = {
3880 [0] = "Starting %s...",
3881 [1] = "Stopping %s...",
3882 },
3883 .finished_start_job = {
3884 [JOB_DONE] = "Started %s.",
3885 [JOB_FAILED] = "Failed to start %s.",
3886 [JOB_DEPENDENCY] = "Dependency failed for %s.",
3887 [JOB_TIMEOUT] = "Timed out starting %s.",
3888 },
3889 .finished_stop_job = {
3890 [JOB_DONE] = "Stopped %s.",
3891 [JOB_FAILED] = "Stopped (with error) %s.",
3892 [JOB_TIMEOUT] = "Timed out stopping %s.",
3893 },
3894 },
3895 };
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