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[thirdparty/systemd.git] / src / core / service.c
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 "bus-errors.h"
40 #include "exit-status.h"
41 #include "def.h"
42 #include "path-util.h"
43 #include "util.h"
44 #include "utf8.h"
45 #include "env-util.h"
46 #include "fileio.h"
47
48 #ifdef HAVE_SYSV_COMPAT
49
50 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
51
52 typedef enum RunlevelType {
53 RUNLEVEL_UP,
54 RUNLEVEL_DOWN
55 } RunlevelType;
56
57 static const struct {
58 const char *path;
59 const char *target;
60 const RunlevelType type;
61 } rcnd_table[] = {
62 /* Standard SysV runlevels for start-up */
63 { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP },
64 { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
65 { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
66 { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
67 { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
68
69 /* Standard SysV runlevels for shutdown */
70 { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN },
71 { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }
72
73 /* Note that the order here matters, as we read the
74 directories in this order, and we want to make sure that
75 sysv_start_priority is known when we first load the
76 unit. And that value we only know from S links. Hence
77 UP must be read before DOWN */
78 };
79
80 #define RUNLEVELS_UP "12345"
81 #endif
82
83 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
84 [SERVICE_DEAD] = UNIT_INACTIVE,
85 [SERVICE_START_PRE] = UNIT_ACTIVATING,
86 [SERVICE_START] = UNIT_ACTIVATING,
87 [SERVICE_START_POST] = UNIT_ACTIVATING,
88 [SERVICE_RUNNING] = UNIT_ACTIVE,
89 [SERVICE_EXITED] = UNIT_ACTIVE,
90 [SERVICE_RELOAD] = UNIT_RELOADING,
91 [SERVICE_STOP] = UNIT_DEACTIVATING,
92 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
93 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
94 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
95 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
96 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
97 [SERVICE_FAILED] = UNIT_FAILED,
98 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
99 };
100
101 /* For Type=idle we never want to delay any other jobs, hence we
102 * consider idle jobs active as soon as we start working on them */
103 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
104 [SERVICE_DEAD] = UNIT_INACTIVE,
105 [SERVICE_START_PRE] = UNIT_ACTIVE,
106 [SERVICE_START] = UNIT_ACTIVE,
107 [SERVICE_START_POST] = UNIT_ACTIVE,
108 [SERVICE_RUNNING] = UNIT_ACTIVE,
109 [SERVICE_EXITED] = UNIT_ACTIVE,
110 [SERVICE_RELOAD] = UNIT_RELOADING,
111 [SERVICE_STOP] = UNIT_DEACTIVATING,
112 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
113 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
114 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
115 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
116 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
117 [SERVICE_FAILED] = UNIT_FAILED,
118 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
119 };
120
121 static void service_init(Unit *u) {
122 Service *s = SERVICE(u);
123
124 assert(u);
125 assert(u->load_state == UNIT_STUB);
126
127 s->timeout_start_usec = DEFAULT_TIMEOUT_USEC;
128 s->timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
129 s->restart_usec = DEFAULT_RESTART_USEC;
130 s->type = _SERVICE_TYPE_INVALID;
131
132 watch_init(&s->watchdog_watch);
133 watch_init(&s->timer_watch);
134
135 #ifdef HAVE_SYSV_COMPAT
136 s->sysv_start_priority = -1;
137 s->sysv_start_priority_from_rcnd = -1;
138 #endif
139 s->socket_fd = -1;
140 s->guess_main_pid = true;
141
142 exec_context_init(&s->exec_context);
143 kill_context_init(&s->kill_context);
144
145 RATELIMIT_INIT(s->start_limit, 10*USEC_PER_SEC, 5);
146
147 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
148 }
149
150 static void service_unwatch_control_pid(Service *s) {
151 assert(s);
152
153 if (s->control_pid <= 0)
154 return;
155
156 unit_unwatch_pid(UNIT(s), s->control_pid);
157 s->control_pid = 0;
158 }
159
160 static void service_unwatch_main_pid(Service *s) {
161 assert(s);
162
163 if (s->main_pid <= 0)
164 return;
165
166 unit_unwatch_pid(UNIT(s), s->main_pid);
167 s->main_pid = 0;
168 }
169
170 static void service_unwatch_pid_file(Service *s) {
171 if (!s->pid_file_pathspec)
172 return;
173
174 log_debug_unit(UNIT(s)->id, "Stopping watch for %s's PID file %s",
175 UNIT(s)->id, s->pid_file_pathspec->path);
176 path_spec_unwatch(s->pid_file_pathspec, UNIT(s));
177 path_spec_done(s->pid_file_pathspec);
178 free(s->pid_file_pathspec);
179 s->pid_file_pathspec = NULL;
180 }
181
182 static int service_set_main_pid(Service *s, pid_t pid) {
183 pid_t ppid;
184
185 assert(s);
186
187 if (pid <= 1)
188 return -EINVAL;
189
190 if (pid == getpid())
191 return -EINVAL;
192
193 s->main_pid = pid;
194 s->main_pid_known = true;
195
196 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
197 log_warning_unit(UNIT(s)->id,
198 "%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
199 UNIT(s)->id, (unsigned long) pid);
200
201 s->main_pid_alien = true;
202 } else
203 s->main_pid_alien = false;
204
205 exec_status_start(&s->main_exec_status, pid);
206
207 return 0;
208 }
209
210 static void service_close_socket_fd(Service *s) {
211 assert(s);
212
213 if (s->socket_fd < 0)
214 return;
215
216 close_nointr_nofail(s->socket_fd);
217 s->socket_fd = -1;
218 }
219
220 static void service_connection_unref(Service *s) {
221 assert(s);
222
223 if (!UNIT_DEREF(s->accept_socket))
224 return;
225
226 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
227 unit_ref_unset(&s->accept_socket);
228 }
229
230 static void service_stop_watchdog(Service *s) {
231 assert(s);
232
233 unit_unwatch_timer(UNIT(s), &s->watchdog_watch);
234 s->watchdog_timestamp.realtime = 0;
235 s->watchdog_timestamp.monotonic = 0;
236 }
237
238 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart);
239
240 static void service_handle_watchdog(Service *s) {
241 usec_t offset;
242 int r;
243
244 assert(s);
245
246 if (s->watchdog_usec == 0)
247 return;
248
249 offset = now(CLOCK_MONOTONIC) - s->watchdog_timestamp.monotonic;
250 if (offset >= s->watchdog_usec) {
251 log_error_unit(UNIT(s)->id, "%s watchdog timeout!", UNIT(s)->id);
252 service_enter_dead(s, SERVICE_FAILURE_WATCHDOG, true);
253 return;
254 }
255
256 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->watchdog_usec - offset, &s->watchdog_watch);
257 if (r < 0)
258 log_warning_unit(UNIT(s)->id,
259 "%s failed to install watchdog timer: %s",
260 UNIT(s)->id, strerror(-r));
261 }
262
263 static void service_reset_watchdog(Service *s) {
264 assert(s);
265
266 dual_timestamp_get(&s->watchdog_timestamp);
267 service_handle_watchdog(s);
268 }
269
270 static void service_done(Unit *u) {
271 Service *s = SERVICE(u);
272
273 assert(s);
274
275 free(s->pid_file);
276 s->pid_file = NULL;
277
278 #ifdef HAVE_SYSV_COMPAT
279 free(s->sysv_runlevels);
280 s->sysv_runlevels = NULL;
281 #endif
282
283 free(s->status_text);
284 s->status_text = NULL;
285
286 exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager));
287 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
288 s->control_command = NULL;
289 s->main_command = NULL;
290
291 set_free(s->restart_ignore_status.code);
292 s->restart_ignore_status.code = NULL;
293 set_free(s->restart_ignore_status.signal);
294 s->restart_ignore_status.signal = NULL;
295
296 set_free(s->success_status.code);
297 s->success_status.code = NULL;
298 set_free(s->success_status.signal);
299 s->success_status.signal = NULL;
300
301 /* This will leak a process, but at least no memory or any of
302 * our resources */
303 service_unwatch_main_pid(s);
304 service_unwatch_control_pid(s);
305 service_unwatch_pid_file(s);
306
307 if (s->bus_name) {
308 unit_unwatch_bus_name(u, s->bus_name);
309 free(s->bus_name);
310 s->bus_name = NULL;
311 }
312
313 service_close_socket_fd(s);
314 service_connection_unref(s);
315
316 unit_ref_unset(&s->accept_socket);
317
318 service_stop_watchdog(s);
319
320 unit_unwatch_timer(u, &s->timer_watch);
321 }
322
323 #ifdef HAVE_SYSV_COMPAT
324 static char *sysv_translate_name(const char *name) {
325 char *r;
326
327 r = new(char, strlen(name) + sizeof(".service"));
328 if (!r)
329 return NULL;
330
331 if (endswith(name, ".sh"))
332 /* Drop .sh suffix */
333 strcpy(stpcpy(r, name) - 3, ".service");
334 else
335 /* Normal init script name */
336 strcpy(stpcpy(r, name), ".service");
337
338 return r;
339 }
340
341 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
342
343 /* We silently ignore the $ prefix here. According to the LSB
344 * spec it simply indicates whether something is a
345 * standardized name or a distribution-specific one. Since we
346 * just follow what already exists and do not introduce new
347 * uses or names we don't care who introduced a new name. */
348
349 static const char * const table[] = {
350 /* LSB defined facilities */
351 "local_fs", NULL,
352 "network", SPECIAL_NETWORK_TARGET,
353 "named", SPECIAL_NSS_LOOKUP_TARGET,
354 "portmap", SPECIAL_RPCBIND_TARGET,
355 "remote_fs", SPECIAL_REMOTE_FS_TARGET,
356 "syslog", NULL,
357 "time", SPECIAL_TIME_SYNC_TARGET,
358 };
359
360 unsigned i;
361 char *r;
362 const char *n;
363
364 assert(name);
365 assert(_r);
366
367 n = *name == '$' ? name + 1 : name;
368
369 for (i = 0; i < ELEMENTSOF(table); i += 2) {
370
371 if (!streq(table[i], n))
372 continue;
373
374 if (!table[i+1])
375 return 0;
376
377 r = strdup(table[i+1]);
378 if (!r)
379 return log_oom();
380
381 goto finish;
382 }
383
384 /* If we don't know this name, fallback heuristics to figure
385 * out whether something is a target or a service alias. */
386
387 if (*name == '$') {
388 if (!unit_prefix_is_valid(n))
389 return -EINVAL;
390
391 /* Facilities starting with $ are most likely targets */
392 r = unit_name_build(n, NULL, ".target");
393 } else if (filename && streq(name, filename))
394 /* Names equaling the file name of the services are redundant */
395 return 0;
396 else
397 /* Everything else we assume to be normal service names */
398 r = sysv_translate_name(n);
399
400 if (!r)
401 return -ENOMEM;
402
403 finish:
404 *_r = r;
405
406 return 1;
407 }
408
409 static int sysv_fix_order(Service *s) {
410 Unit *other;
411 int r;
412
413 assert(s);
414
415 if (s->sysv_start_priority < 0)
416 return 0;
417
418 /* For each pair of services where at least one lacks a LSB
419 * header, we use the start priority value to order things. */
420
421 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
422 Service *t;
423 UnitDependency d;
424 bool special_s, special_t;
425
426 t = SERVICE(other);
427
428 if (s == t)
429 continue;
430
431 if (UNIT(t)->load_state != UNIT_LOADED)
432 continue;
433
434 if (t->sysv_start_priority < 0)
435 continue;
436
437 /* If both units have modern headers we don't care
438 * about the priorities */
439 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
440 (UNIT(t)->fragment_path || t->sysv_has_lsb))
441 continue;
442
443 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
444 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
445
446 if (special_t && !special_s)
447 d = UNIT_AFTER;
448 else if (special_s && !special_t)
449 d = UNIT_BEFORE;
450 else if (t->sysv_start_priority < s->sysv_start_priority)
451 d = UNIT_AFTER;
452 else if (t->sysv_start_priority > s->sysv_start_priority)
453 d = UNIT_BEFORE;
454 else
455 continue;
456
457 /* FIXME: Maybe we should compare the name here lexicographically? */
458
459 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
460 return r;
461 }
462
463 return 0;
464 }
465
466 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
467 ExecCommand *c;
468
469 if (!(c = new0(ExecCommand, 1)))
470 return NULL;
471
472 if (!(c->path = strdup(path))) {
473 free(c);
474 return NULL;
475 }
476
477 if (!(c->argv = strv_new(path, arg1, NULL))) {
478 free(c->path);
479 free(c);
480 return NULL;
481 }
482
483 return c;
484 }
485
486 static int sysv_exec_commands(Service *s, const bool supports_reload) {
487 ExecCommand *c;
488
489 assert(s);
490 assert(s->is_sysv);
491 assert(UNIT(s)->source_path);
492
493 c = exec_command_new(UNIT(s)->source_path, "start");
494 if (!c)
495 return -ENOMEM;
496 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
497
498 c = exec_command_new(UNIT(s)->source_path, "stop");
499 if (!c)
500 return -ENOMEM;
501 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
502
503 if (supports_reload) {
504 c = exec_command_new(UNIT(s)->source_path, "reload");
505 if (!c)
506 return -ENOMEM;
507 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
508 }
509
510 return 0;
511 }
512
513 static bool usage_contains_reload(const char *line) {
514 return (strcasestr(line, "{reload|") ||
515 strcasestr(line, "{reload}") ||
516 strcasestr(line, "{reload\"") ||
517 strcasestr(line, "|reload|") ||
518 strcasestr(line, "|reload}") ||
519 strcasestr(line, "|reload\""));
520 }
521
522 static int service_load_sysv_path(Service *s, const char *path) {
523 FILE *f;
524 Unit *u;
525 unsigned line = 0;
526 int r;
527 enum {
528 NORMAL,
529 DESCRIPTION,
530 LSB,
531 LSB_DESCRIPTION,
532 USAGE_CONTINUATION
533 } state = NORMAL;
534 char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
535 struct stat st;
536 bool supports_reload = false;
537
538 assert(s);
539 assert(path);
540
541 u = UNIT(s);
542
543 f = fopen(path, "re");
544 if (!f) {
545 r = errno == ENOENT ? 0 : -errno;
546 goto finish;
547 }
548
549 if (fstat(fileno(f), &st) < 0) {
550 r = -errno;
551 goto finish;
552 }
553
554 free(u->source_path);
555 u->source_path = strdup(path);
556 if (!u->source_path) {
557 r = -ENOMEM;
558 goto finish;
559 }
560 u->source_mtime = timespec_load(&st.st_mtim);
561
562 if (null_or_empty(&st)) {
563 u->load_state = UNIT_MASKED;
564 r = 0;
565 goto finish;
566 }
567
568 s->is_sysv = true;
569
570 while (!feof(f)) {
571 char l[LINE_MAX], *t;
572
573 if (!fgets(l, sizeof(l), f)) {
574 if (feof(f))
575 break;
576
577 r = -errno;
578 log_error_unit(u->id,
579 "Failed to read configuration file '%s': %s",
580 path, strerror(-r));
581 goto finish;
582 }
583
584 line++;
585
586 t = strstrip(l);
587 if (*t != '#') {
588 /* Try to figure out whether this init script supports
589 * the reload operation. This heuristic looks for
590 * "Usage" lines which include the reload option. */
591 if ( state == USAGE_CONTINUATION ||
592 (state == NORMAL && strcasestr(t, "usage"))) {
593 if (usage_contains_reload(t)) {
594 supports_reload = true;
595 state = NORMAL;
596 } else if (t[strlen(t)-1] == '\\')
597 state = USAGE_CONTINUATION;
598 else
599 state = NORMAL;
600 }
601
602 continue;
603 }
604
605 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
606 state = LSB;
607 s->sysv_has_lsb = true;
608 continue;
609 }
610
611 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
612 state = NORMAL;
613 continue;
614 }
615
616 t++;
617 t += strspn(t, WHITESPACE);
618
619 if (state == NORMAL) {
620
621 /* Try to parse Red Hat style chkconfig headers */
622
623 if (startswith_no_case(t, "chkconfig:")) {
624 int start_priority;
625 char runlevels[16], *k;
626
627 state = NORMAL;
628
629 if (sscanf(t+10, "%15s %i %*i",
630 runlevels,
631 &start_priority) != 2) {
632
633 log_warning_unit(u->id,
634 "[%s:%u] Failed to parse chkconfig line. Ignoring.",
635 path, line);
636 continue;
637 }
638
639 /* A start priority gathered from the
640 * symlink farms is preferred over the
641 * data from the LSB header. */
642 if (start_priority < 0 || start_priority > 99)
643 log_warning_unit(u->id,
644 "[%s:%u] Start priority out of range. Ignoring.",
645 path, line);
646 else
647 s->sysv_start_priority = start_priority;
648
649 char_array_0(runlevels);
650 k = delete_chars(runlevels, WHITESPACE "-");
651
652 if (k[0]) {
653 char *d;
654
655 if (!(d = strdup(k))) {
656 r = -ENOMEM;
657 goto finish;
658 }
659
660 free(s->sysv_runlevels);
661 s->sysv_runlevels = d;
662 }
663
664 } else if (startswith_no_case(t, "description:")) {
665
666 size_t k = strlen(t);
667 char *d;
668 const char *j;
669
670 if (t[k-1] == '\\') {
671 state = DESCRIPTION;
672 t[k-1] = 0;
673 }
674
675 if ((j = strstrip(t+12)) && *j) {
676 if (!(d = strdup(j))) {
677 r = -ENOMEM;
678 goto finish;
679 }
680 } else
681 d = NULL;
682
683 free(chkconfig_description);
684 chkconfig_description = d;
685
686 } else if (startswith_no_case(t, "pidfile:")) {
687
688 char *fn;
689
690 state = NORMAL;
691
692 fn = strstrip(t+8);
693 if (!path_is_absolute(fn)) {
694 log_warning_unit(u->id,
695 "[%s:%u] PID file not absolute. Ignoring.",
696 path, line);
697 continue;
698 }
699
700 if (!(fn = strdup(fn))) {
701 r = -ENOMEM;
702 goto finish;
703 }
704
705 free(s->pid_file);
706 s->pid_file = fn;
707 }
708
709 } else if (state == DESCRIPTION) {
710
711 /* Try to parse Red Hat style description
712 * continuation */
713
714 size_t k = strlen(t);
715 char *j;
716
717 if (t[k-1] == '\\')
718 t[k-1] = 0;
719 else
720 state = NORMAL;
721
722 if ((j = strstrip(t)) && *j) {
723 char *d = NULL;
724
725 if (chkconfig_description)
726 d = strjoin(chkconfig_description, " ", j, NULL);
727 else
728 d = strdup(j);
729
730 if (!d) {
731 r = -ENOMEM;
732 goto finish;
733 }
734
735 free(chkconfig_description);
736 chkconfig_description = d;
737 }
738
739 } else if (state == LSB || state == LSB_DESCRIPTION) {
740
741 if (startswith_no_case(t, "Provides:")) {
742 char *i, *w;
743 size_t z;
744
745 state = LSB;
746
747 FOREACH_WORD_QUOTED(w, z, t+9, i) {
748 char *n, *m;
749
750 if (!(n = strndup(w, z))) {
751 r = -ENOMEM;
752 goto finish;
753 }
754
755 r = sysv_translate_facility(n, path_get_file_name(path), &m);
756 free(n);
757
758 if (r < 0)
759 goto finish;
760
761 if (r == 0)
762 continue;
763
764 if (unit_name_to_type(m) == UNIT_SERVICE)
765 r = unit_merge_by_name(u, m);
766 else
767 /* NB: SysV targets
768 * which are provided
769 * by a service are
770 * pulled in by the
771 * services, as an
772 * indication that the
773 * generic service is
774 * now available. This
775 * is strictly
776 * one-way. The
777 * targets do NOT pull
778 * in the SysV
779 * services! */
780 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
781
782 if (r < 0)
783 log_error_unit(u->id,
784 "[%s:%u] Failed to add LSB Provides name %s, ignoring: %s",
785 path, line, m, strerror(-r));
786
787 free(m);
788 }
789
790 } else if (startswith_no_case(t, "Required-Start:") ||
791 startswith_no_case(t, "Should-Start:") ||
792 startswith_no_case(t, "X-Start-Before:") ||
793 startswith_no_case(t, "X-Start-After:")) {
794 char *i, *w;
795 size_t z;
796
797 state = LSB;
798
799 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
800 char *n, *m;
801
802 if (!(n = strndup(w, z))) {
803 r = -ENOMEM;
804 goto finish;
805 }
806
807 r = sysv_translate_facility(n, path_get_file_name(path), &m);
808 if (r < 0) {
809 log_error_unit(u->id,
810 "[%s:%u] Failed to translate LSB dependency %s, ignoring: %s",
811 path, line, n, strerror(-r));
812 free(n);
813 continue;
814 }
815
816 free(n);
817
818 if (r == 0)
819 continue;
820
821 r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
822
823 if (r < 0)
824 log_error_unit(u->id, "[%s:%u] Failed to add dependency on %s, ignoring: %s",
825 path, line, m, strerror(-r));
826
827 free(m);
828 }
829 } else if (startswith_no_case(t, "Default-Start:")) {
830 char *k, *d;
831
832 state = LSB;
833
834 k = delete_chars(t+14, WHITESPACE "-");
835
836 if (k[0] != 0) {
837 if (!(d = strdup(k))) {
838 r = -ENOMEM;
839 goto finish;
840 }
841
842 free(s->sysv_runlevels);
843 s->sysv_runlevels = d;
844 }
845
846 } else if (startswith_no_case(t, "Description:")) {
847 char *d, *j;
848
849 state = LSB_DESCRIPTION;
850
851 if ((j = strstrip(t+12)) && *j) {
852 if (!(d = strdup(j))) {
853 r = -ENOMEM;
854 goto finish;
855 }
856 } else
857 d = NULL;
858
859 free(long_description);
860 long_description = d;
861
862 } else if (startswith_no_case(t, "Short-Description:")) {
863 char *d, *j;
864
865 state = LSB;
866
867 if ((j = strstrip(t+18)) && *j) {
868 if (!(d = strdup(j))) {
869 r = -ENOMEM;
870 goto finish;
871 }
872 } else
873 d = NULL;
874
875 free(short_description);
876 short_description = d;
877
878 } else if (state == LSB_DESCRIPTION) {
879
880 if (startswith(l, "#\t") || startswith(l, "# ")) {
881 char *j;
882
883 if ((j = strstrip(t)) && *j) {
884 char *d = NULL;
885
886 if (long_description)
887 d = strjoin(long_description, " ", t, NULL);
888 else
889 d = strdup(j);
890
891 if (!d) {
892 r = -ENOMEM;
893 goto finish;
894 }
895
896 free(long_description);
897 long_description = d;
898 }
899
900 } else
901 state = LSB;
902 }
903 }
904 }
905
906 if ((r = sysv_exec_commands(s, supports_reload)) < 0)
907 goto finish;
908
909 if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
910 /* If there a runlevels configured for this service
911 * but none of the standard ones, then we assume this
912 * is some special kind of service (which might be
913 * needed for early boot) and don't create any links
914 * to it. */
915
916 UNIT(s)->default_dependencies = false;
917
918 /* Don't timeout special services during boot (like fsck) */
919 s->timeout_start_usec = 0;
920 s->timeout_stop_usec = 0;
921 } else {
922 s->timeout_start_usec = DEFAULT_SYSV_TIMEOUT_USEC;
923 s->timeout_stop_usec = DEFAULT_SYSV_TIMEOUT_USEC;
924 }
925
926 /* Special setting for all SysV services */
927 s->type = SERVICE_FORKING;
928 s->remain_after_exit = !s->pid_file;
929 s->guess_main_pid = false;
930 s->restart = SERVICE_RESTART_NO;
931 s->exec_context.ignore_sigpipe = false;
932 s->kill_context.kill_mode = KILL_PROCESS;
933
934 /* We use the long description only if
935 * no short description is set. */
936
937 if (short_description)
938 description = short_description;
939 else if (chkconfig_description)
940 description = chkconfig_description;
941 else if (long_description)
942 description = long_description;
943 else
944 description = NULL;
945
946 if (description) {
947 char *d;
948
949 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
950 r = -ENOMEM;
951 goto finish;
952 }
953
954 u->description = d;
955 }
956
957 /* The priority that has been set in /etc/rcN.d/ hierarchies
958 * takes precedence over what is stored as default in the LSB
959 * header */
960 if (s->sysv_start_priority_from_rcnd >= 0)
961 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
962
963 u->load_state = UNIT_LOADED;
964 r = 0;
965
966 finish:
967
968 if (f)
969 fclose(f);
970
971 free(short_description);
972 free(long_description);
973 free(chkconfig_description);
974
975 return r;
976 }
977
978 static int service_load_sysv_name(Service *s, const char *name) {
979 char **p;
980
981 assert(s);
982 assert(name);
983
984 /* For SysV services we strip the *.sh suffixes. */
985 if (endswith(name, ".sh.service"))
986 return -ENOENT;
987
988 STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
989 char *path;
990 int r;
991
992 path = strjoin(*p, "/", name, NULL);
993 if (!path)
994 return -ENOMEM;
995
996 assert(endswith(path, ".service"));
997 path[strlen(path)-8] = 0;
998
999 r = service_load_sysv_path(s, path);
1000
1001 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1002 /* Try *.sh source'able init scripts */
1003 strcat(path, ".sh");
1004 r = service_load_sysv_path(s, path);
1005 }
1006 free(path);
1007
1008 if (r < 0)
1009 return r;
1010
1011 if (UNIT(s)->load_state != UNIT_STUB)
1012 break;
1013 }
1014
1015 return 0;
1016 }
1017
1018 static int service_load_sysv(Service *s) {
1019 const char *t;
1020 Iterator i;
1021 int r;
1022
1023 assert(s);
1024
1025 /* Load service data from SysV init scripts, preferably with
1026 * LSB headers ... */
1027
1028 if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1029 return 0;
1030
1031 if ((t = UNIT(s)->id))
1032 if ((r = service_load_sysv_name(s, t)) < 0)
1033 return r;
1034
1035 if (UNIT(s)->load_state == UNIT_STUB)
1036 SET_FOREACH(t, UNIT(s)->names, i) {
1037 if (t == UNIT(s)->id)
1038 continue;
1039
1040 if ((r = service_load_sysv_name(s, t)) < 0)
1041 return r;
1042
1043 if (UNIT(s)->load_state != UNIT_STUB)
1044 break;
1045 }
1046
1047 return 0;
1048 }
1049 #endif
1050
1051 static int fsck_fix_order(Service *s) {
1052 Unit *other;
1053 int r;
1054
1055 assert(s);
1056
1057 if (s->fsck_passno <= 0)
1058 return 0;
1059
1060 /* For each pair of services where both have an fsck priority
1061 * we order things based on it. */
1062
1063 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
1064 Service *t;
1065 UnitDependency d;
1066
1067 t = SERVICE(other);
1068
1069 if (s == t)
1070 continue;
1071
1072 if (UNIT(t)->load_state != UNIT_LOADED)
1073 continue;
1074
1075 if (t->fsck_passno <= 0)
1076 continue;
1077
1078 if (t->fsck_passno < s->fsck_passno)
1079 d = UNIT_AFTER;
1080 else if (t->fsck_passno > s->fsck_passno)
1081 d = UNIT_BEFORE;
1082 else
1083 continue;
1084
1085 r = unit_add_dependency(UNIT(s), d, UNIT(t), true);
1086 if (r < 0)
1087 return r;
1088 }
1089
1090 return 0;
1091 }
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_DBUS && !s->bus_name) {
1113 log_error_unit(UNIT(s)->id,
1114 "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1115 return -EINVAL;
1116 }
1117
1118 if (s->bus_name && s->type != SERVICE_DBUS)
1119 log_warning_unit(UNIT(s)->id,
1120 "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
1121
1122 if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
1123 log_error_unit(UNIT(s)->id,
1124 "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
1125 return -EINVAL;
1126 }
1127
1128 return 0;
1129 }
1130
1131 static int service_add_default_dependencies(Service *s) {
1132 int r;
1133
1134 assert(s);
1135
1136 /* Add a number of automatic dependencies useful for the
1137 * majority of services. */
1138
1139 /* First, pull in base system */
1140 if (UNIT(s)->manager->running_as == SYSTEMD_SYSTEM) {
1141 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1142 SPECIAL_BASIC_TARGET, NULL, true);
1143 if (r < 0)
1144 return r;
1145
1146 } else if (UNIT(s)->manager->running_as == SYSTEMD_USER) {
1147 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1148 SPECIAL_SOCKETS_TARGET, NULL, true);
1149 if (r < 0)
1150 return r;
1151
1152 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1153 SPECIAL_TIMERS_TARGET, NULL, true);
1154 if (r < 0)
1155 return r;
1156
1157 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1158 SPECIAL_PATHS_TARGET, NULL, true);
1159 if (r < 0)
1160 return r;
1161 }
1162
1163 /* Second, activate normal shutdown */
1164 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS,
1165 SPECIAL_SHUTDOWN_TARGET, NULL, true);
1166 return r;
1167 }
1168
1169 static void service_fix_output(Service *s) {
1170 assert(s);
1171
1172 /* If nothing has been explicitly configured, patch default
1173 * output in. If input is socket/tty we avoid this however,
1174 * since in that case we want output to default to the same
1175 * place as we read input from. */
1176
1177 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1178 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1179 s->exec_context.std_input == EXEC_INPUT_NULL)
1180 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1181
1182 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1183 s->exec_context.std_input == EXEC_INPUT_NULL)
1184 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1185 }
1186
1187 static int service_load(Unit *u) {
1188 int r;
1189 Service *s = SERVICE(u);
1190
1191 assert(s);
1192
1193 /* Load a .service file */
1194 if ((r = unit_load_fragment(u)) < 0)
1195 return r;
1196
1197 #ifdef HAVE_SYSV_COMPAT
1198 /* Load a classic init script as a fallback, if we couldn't find anything */
1199 if (u->load_state == UNIT_STUB)
1200 if ((r = service_load_sysv(s)) < 0)
1201 return r;
1202 #endif
1203
1204 /* Still nothing found? Then let's give up */
1205 if (u->load_state == UNIT_STUB)
1206 return -ENOENT;
1207
1208 /* We were able to load something, then let's add in the
1209 * dropin directories. */
1210 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1211 return r;
1212
1213 /* This is a new unit? Then let's add in some extras */
1214 if (u->load_state == UNIT_LOADED) {
1215 if (s->type == _SERVICE_TYPE_INVALID)
1216 s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
1217
1218 /* Oneshot services have disabled start timeout by default */
1219 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
1220 s->timeout_start_usec = 0;
1221
1222 service_fix_output(s);
1223
1224 r = unit_add_exec_dependencies(u, &s->exec_context);
1225 if (r < 0)
1226 return r;
1227
1228 r = unit_add_default_cgroups(u);
1229 if (r < 0)
1230 return r;
1231
1232 #ifdef HAVE_SYSV_COMPAT
1233 r = sysv_fix_order(s);
1234 if (r < 0)
1235 return r;
1236 #endif
1237
1238 r = fsck_fix_order(s);
1239 if (r < 0)
1240 return r;
1241
1242 if (s->bus_name)
1243 if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1244 return r;
1245
1246 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1247 s->notify_access = NOTIFY_MAIN;
1248
1249 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1250 s->notify_access = NOTIFY_MAIN;
1251
1252 if (s->type == SERVICE_DBUS || s->bus_name) {
1253 r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES,
1254 SPECIAL_DBUS_SOCKET, NULL, true);
1255 if (r < 0)
1256 return r;
1257 }
1258
1259 if (UNIT(s)->default_dependencies) {
1260 r = service_add_default_dependencies(s);
1261 if (r < 0)
1262 return r;
1263 }
1264
1265 r = unit_exec_context_defaults(u, &s->exec_context);
1266 if (r < 0)
1267 return r;
1268 }
1269
1270 return service_verify(s);
1271 }
1272
1273 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1274
1275 ServiceExecCommand c;
1276 Service *s = SERVICE(u);
1277 const char *prefix2;
1278 char _cleanup_free_ *p2 = NULL;
1279
1280 assert(s);
1281
1282 p2 = strappend(prefix, "\t");
1283 prefix2 = p2 ? p2 : prefix;
1284
1285 fprintf(f,
1286 "%sService State: %s\n"
1287 "%sResult: %s\n"
1288 "%sReload Result: %s\n"
1289 "%sPermissionsStartOnly: %s\n"
1290 "%sRootDirectoryStartOnly: %s\n"
1291 "%sRemainAfterExit: %s\n"
1292 "%sGuessMainPID: %s\n"
1293 "%sType: %s\n"
1294 "%sRestart: %s\n"
1295 "%sNotifyAccess: %s\n",
1296 prefix, service_state_to_string(s->state),
1297 prefix, service_result_to_string(s->result),
1298 prefix, service_result_to_string(s->reload_result),
1299 prefix, yes_no(s->permissions_start_only),
1300 prefix, yes_no(s->root_directory_start_only),
1301 prefix, yes_no(s->remain_after_exit),
1302 prefix, yes_no(s->guess_main_pid),
1303 prefix, service_type_to_string(s->type),
1304 prefix, service_restart_to_string(s->restart),
1305 prefix, notify_access_to_string(s->notify_access));
1306
1307 if (s->control_pid > 0)
1308 fprintf(f,
1309 "%sControl PID: %lu\n",
1310 prefix, (unsigned long) s->control_pid);
1311
1312 if (s->main_pid > 0)
1313 fprintf(f,
1314 "%sMain PID: %lu\n"
1315 "%sMain PID Known: %s\n"
1316 "%sMain PID Alien: %s\n",
1317 prefix, (unsigned long) s->main_pid,
1318 prefix, yes_no(s->main_pid_known),
1319 prefix, yes_no(s->main_pid_alien));
1320
1321 if (s->pid_file)
1322 fprintf(f,
1323 "%sPIDFile: %s\n",
1324 prefix, s->pid_file);
1325
1326 if (s->bus_name)
1327 fprintf(f,
1328 "%sBusName: %s\n"
1329 "%sBus Name Good: %s\n",
1330 prefix, s->bus_name,
1331 prefix, yes_no(s->bus_name_good));
1332
1333 kill_context_dump(&s->kill_context, f, prefix);
1334 exec_context_dump(&s->exec_context, f, prefix);
1335
1336 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1337
1338 if (!s->exec_command[c])
1339 continue;
1340
1341 fprintf(f, "%s-> %s:\n",
1342 prefix, service_exec_command_to_string(c));
1343
1344 exec_command_dump_list(s->exec_command[c], f, prefix2);
1345 }
1346
1347 #ifdef HAVE_SYSV_COMPAT
1348 if (s->is_sysv)
1349 fprintf(f,
1350 "%sSysV Init Script has LSB Header: %s\n"
1351 "%sSysVEnabled: %s\n",
1352 prefix, yes_no(s->sysv_has_lsb),
1353 prefix, yes_no(s->sysv_enabled));
1354
1355 if (s->sysv_start_priority >= 0)
1356 fprintf(f,
1357 "%sSysVStartPriority: %i\n",
1358 prefix, s->sysv_start_priority);
1359
1360 if (s->sysv_runlevels)
1361 fprintf(f, "%sSysVRunLevels: %s\n",
1362 prefix, s->sysv_runlevels);
1363 #endif
1364
1365 if (s->fsck_passno > 0)
1366 fprintf(f,
1367 "%sFsckPassNo: %i\n",
1368 prefix, s->fsck_passno);
1369
1370 if (s->status_text)
1371 fprintf(f, "%sStatus Text: %s\n",
1372 prefix, s->status_text);
1373 }
1374
1375 static int service_load_pid_file(Service *s, bool may_warn) {
1376 char _cleanup_free_ *k = NULL;
1377 int r;
1378 pid_t pid;
1379
1380 assert(s);
1381
1382 if (!s->pid_file)
1383 return -ENOENT;
1384
1385 r = read_one_line_file(s->pid_file, &k);
1386 if (r < 0) {
1387 if (may_warn)
1388 log_info_unit(UNIT(s)->id,
1389 "PID file %s not readable (yet?) after %s.",
1390 s->pid_file, service_state_to_string(s->state));
1391 return r;
1392 }
1393
1394 r = parse_pid(k, &pid);
1395 if (r < 0) {
1396 if (may_warn)
1397 log_info_unit(UNIT(s)->id,
1398 "Failed to read PID from file %s: %s",
1399 s->pid_file, strerror(-r));
1400 return r;
1401 }
1402
1403 if (kill(pid, 0) < 0 && errno != EPERM) {
1404 if (may_warn)
1405 log_info_unit(UNIT(s)->id,
1406 "PID %lu read from file %s does not exist.",
1407 (unsigned long) pid, s->pid_file);
1408 return -ESRCH;
1409 }
1410
1411 if (s->main_pid_known) {
1412 if (pid == s->main_pid)
1413 return 0;
1414
1415 log_debug_unit(UNIT(s)->id,
1416 "Main PID changing: %lu -> %lu",
1417 (unsigned long) s->main_pid, (unsigned long) pid);
1418 service_unwatch_main_pid(s);
1419 s->main_pid_known = false;
1420 } else
1421 log_debug_unit(UNIT(s)->id,
1422 "Main PID loaded: %lu", (unsigned long) pid);
1423
1424 r = service_set_main_pid(s, pid);
1425 if (r < 0)
1426 return r;
1427
1428 r = unit_watch_pid(UNIT(s), pid);
1429 if (r < 0) {
1430 /* FIXME: we need to do something here */
1431 log_warning_unit(UNIT(s)->id,
1432 "Failed to watch PID %lu from service %s",
1433 (unsigned long) pid, UNIT(s)->id);
1434 return r;
1435 }
1436
1437 return 0;
1438 }
1439
1440 static int service_search_main_pid(Service *s) {
1441 pid_t pid;
1442 int r;
1443
1444 assert(s);
1445
1446 /* If we know it anyway, don't ever fallback to unreliable
1447 * heuristics */
1448 if (s->main_pid_known)
1449 return 0;
1450
1451 if (!s->guess_main_pid)
1452 return 0;
1453
1454 assert(s->main_pid <= 0);
1455
1456 pid = cgroup_bonding_search_main_pid_list(UNIT(s)->cgroup_bondings);
1457 if (pid <= 0)
1458 return -ENOENT;
1459
1460 log_debug_unit(UNIT(s)->id,
1461 "Main PID guessed: %lu", (unsigned long) pid);
1462 r = service_set_main_pid(s, pid);
1463 if (r < 0)
1464 return r;
1465
1466 r = unit_watch_pid(UNIT(s), pid);
1467 if (r < 0)
1468 /* FIXME: we need to do something here */
1469 return r;
1470
1471 return 0;
1472 }
1473
1474 static void service_notify_sockets_dead(Service *s, bool failed_permanent) {
1475 Iterator i;
1476 Unit *u;
1477
1478 assert(s);
1479
1480 /* Notifies all our sockets when we die */
1481
1482 if (s->socket_fd >= 0)
1483 return;
1484
1485 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i)
1486 if (u->type == UNIT_SOCKET)
1487 socket_notify_service_dead(SOCKET(u), failed_permanent);
1488
1489 return;
1490 }
1491
1492 static void service_set_state(Service *s, ServiceState state) {
1493 ServiceState old_state;
1494 const UnitActiveState *table;
1495 assert(s);
1496
1497 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1498
1499 old_state = s->state;
1500 s->state = state;
1501
1502 service_unwatch_pid_file(s);
1503
1504 if (state != SERVICE_START_PRE &&
1505 state != SERVICE_START &&
1506 state != SERVICE_START_POST &&
1507 state != SERVICE_RELOAD &&
1508 state != SERVICE_STOP &&
1509 state != SERVICE_STOP_SIGTERM &&
1510 state != SERVICE_STOP_SIGKILL &&
1511 state != SERVICE_STOP_POST &&
1512 state != SERVICE_FINAL_SIGTERM &&
1513 state != SERVICE_FINAL_SIGKILL &&
1514 state != SERVICE_AUTO_RESTART)
1515 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1516
1517 if (state != SERVICE_START &&
1518 state != SERVICE_START_POST &&
1519 state != SERVICE_RUNNING &&
1520 state != SERVICE_RELOAD &&
1521 state != SERVICE_STOP &&
1522 state != SERVICE_STOP_SIGTERM &&
1523 state != SERVICE_STOP_SIGKILL) {
1524 service_unwatch_main_pid(s);
1525 s->main_command = NULL;
1526 }
1527
1528 if (state != SERVICE_START_PRE &&
1529 state != SERVICE_START &&
1530 state != SERVICE_START_POST &&
1531 state != SERVICE_RELOAD &&
1532 state != SERVICE_STOP &&
1533 state != SERVICE_STOP_SIGTERM &&
1534 state != SERVICE_STOP_SIGKILL &&
1535 state != SERVICE_STOP_POST &&
1536 state != SERVICE_FINAL_SIGTERM &&
1537 state != SERVICE_FINAL_SIGKILL) {
1538 service_unwatch_control_pid(s);
1539 s->control_command = NULL;
1540 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1541 }
1542
1543 if (state == SERVICE_FAILED)
1544 service_notify_sockets_dead(s, s->result == SERVICE_FAILURE_START_LIMIT);
1545
1546 if (state == SERVICE_DEAD ||
1547 state == SERVICE_STOP ||
1548 state == SERVICE_STOP_SIGTERM ||
1549 state == SERVICE_STOP_SIGKILL ||
1550 state == SERVICE_STOP_POST ||
1551 state == SERVICE_FINAL_SIGTERM ||
1552 state == SERVICE_FINAL_SIGKILL ||
1553 state == SERVICE_AUTO_RESTART)
1554 service_notify_sockets_dead(s, false);
1555
1556 if (state != SERVICE_START_PRE &&
1557 state != SERVICE_START &&
1558 state != SERVICE_START_POST &&
1559 state != SERVICE_RUNNING &&
1560 state != SERVICE_RELOAD &&
1561 state != SERVICE_STOP &&
1562 state != SERVICE_STOP_SIGTERM &&
1563 state != SERVICE_STOP_SIGKILL &&
1564 state != SERVICE_STOP_POST &&
1565 state != SERVICE_FINAL_SIGTERM &&
1566 state != SERVICE_FINAL_SIGKILL &&
1567 !(state == SERVICE_DEAD && UNIT(s)->job)) {
1568 service_close_socket_fd(s);
1569 service_connection_unref(s);
1570 }
1571
1572 if (state == SERVICE_STOP || state == SERVICE_STOP_SIGTERM)
1573 service_stop_watchdog(s);
1574
1575 /* For the inactive states unit_notify() will trim the cgroup,
1576 * but for exit we have to do that ourselves... */
1577 if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1578 cgroup_bonding_trim_list(UNIT(s)->cgroup_bondings, true);
1579
1580 if (old_state != state)
1581 log_debug_unit(UNIT(s)->id,
1582 "%s changed %s -> %s", UNIT(s)->id,
1583 service_state_to_string(old_state),
1584 service_state_to_string(state));
1585
1586 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1587 s->reload_result = SERVICE_SUCCESS;
1588 }
1589
1590 static int service_coldplug(Unit *u) {
1591 Service *s = SERVICE(u);
1592 int r;
1593
1594 assert(s);
1595 assert(s->state == SERVICE_DEAD);
1596
1597 if (s->deserialized_state != s->state) {
1598
1599 if (s->deserialized_state == SERVICE_START_PRE ||
1600 s->deserialized_state == SERVICE_START ||
1601 s->deserialized_state == SERVICE_START_POST ||
1602 s->deserialized_state == SERVICE_RELOAD ||
1603 s->deserialized_state == SERVICE_STOP ||
1604 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1605 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1606 s->deserialized_state == SERVICE_STOP_POST ||
1607 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1608 s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1609 s->deserialized_state == SERVICE_AUTO_RESTART) {
1610 if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_start_usec > 0) {
1611 usec_t k;
1612
1613 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_start_usec;
1614
1615 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, k, &s->timer_watch);
1616 if (r < 0)
1617 return r;
1618 }
1619 }
1620
1621 if ((s->deserialized_state == SERVICE_START &&
1622 (s->type == SERVICE_FORKING ||
1623 s->type == SERVICE_DBUS ||
1624 s->type == SERVICE_ONESHOT ||
1625 s->type == SERVICE_NOTIFY)) ||
1626 s->deserialized_state == SERVICE_START_POST ||
1627 s->deserialized_state == SERVICE_RUNNING ||
1628 s->deserialized_state == SERVICE_RELOAD ||
1629 s->deserialized_state == SERVICE_STOP ||
1630 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1631 s->deserialized_state == SERVICE_STOP_SIGKILL)
1632 if (s->main_pid > 0) {
1633 r = unit_watch_pid(UNIT(s), s->main_pid);
1634 if (r < 0)
1635 return r;
1636 }
1637
1638 if (s->deserialized_state == SERVICE_START_PRE ||
1639 s->deserialized_state == SERVICE_START ||
1640 s->deserialized_state == SERVICE_START_POST ||
1641 s->deserialized_state == SERVICE_RELOAD ||
1642 s->deserialized_state == SERVICE_STOP ||
1643 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1644 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1645 s->deserialized_state == SERVICE_STOP_POST ||
1646 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1647 s->deserialized_state == SERVICE_FINAL_SIGKILL)
1648 if (s->control_pid > 0) {
1649 r = unit_watch_pid(UNIT(s), s->control_pid);
1650 if (r < 0)
1651 return r;
1652 }
1653
1654 if (s->deserialized_state == SERVICE_START_POST ||
1655 s->deserialized_state == SERVICE_RUNNING)
1656 service_handle_watchdog(s);
1657
1658 service_set_state(s, s->deserialized_state);
1659 }
1660 return 0;
1661 }
1662
1663 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1664 Iterator i;
1665 int r;
1666 int *rfds = NULL;
1667 unsigned rn_fds = 0;
1668 Unit *u;
1669
1670 assert(s);
1671 assert(fds);
1672 assert(n_fds);
1673
1674 if (s->socket_fd >= 0)
1675 return 0;
1676
1677 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1678 int *cfds;
1679 unsigned cn_fds;
1680 Socket *sock;
1681
1682 if (u->type != UNIT_SOCKET)
1683 continue;
1684
1685 sock = SOCKET(u);
1686
1687 r = socket_collect_fds(sock, &cfds, &cn_fds);
1688 if (r < 0)
1689 goto fail;
1690
1691 if (!cfds)
1692 continue;
1693
1694 if (!rfds) {
1695 rfds = cfds;
1696 rn_fds = cn_fds;
1697 } else {
1698 int *t;
1699
1700 t = new(int, rn_fds+cn_fds);
1701 if (!t) {
1702 free(cfds);
1703 r = -ENOMEM;
1704 goto fail;
1705 }
1706
1707 memcpy(t, rfds, rn_fds * sizeof(int));
1708 memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1709 free(rfds);
1710 free(cfds);
1711
1712 rfds = t;
1713 rn_fds = rn_fds+cn_fds;
1714 }
1715 }
1716
1717 *fds = rfds;
1718 *n_fds = rn_fds;
1719
1720 return 0;
1721
1722 fail:
1723 free(rfds);
1724
1725 return r;
1726 }
1727
1728 static int service_spawn(
1729 Service *s,
1730 ExecCommand *c,
1731 bool timeout,
1732 bool pass_fds,
1733 bool apply_permissions,
1734 bool apply_chroot,
1735 bool apply_tty_stdin,
1736 bool set_notify_socket,
1737 bool is_control,
1738 pid_t *_pid) {
1739
1740 pid_t pid;
1741 int r;
1742 int *fds = NULL;
1743 int _cleanup_free_ *fdsbuf = NULL;
1744 unsigned n_fds = 0, n_env = 0;
1745 char _cleanup_strv_free_
1746 **argv = NULL, **final_env = NULL, **our_env = NULL;
1747
1748 assert(s);
1749 assert(c);
1750 assert(_pid);
1751
1752 if (pass_fds ||
1753 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1754 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1755 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1756
1757 if (s->socket_fd >= 0) {
1758 fds = &s->socket_fd;
1759 n_fds = 1;
1760 } else {
1761 r = service_collect_fds(s, &fdsbuf, &n_fds);
1762 if (r < 0)
1763 goto fail;
1764
1765 fds = fdsbuf;
1766 }
1767 }
1768
1769 if (timeout && s->timeout_start_usec) {
1770 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true,
1771 s->timeout_start_usec, &s->timer_watch);
1772 if (r < 0)
1773 goto fail;
1774 } else
1775 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1776
1777 argv = unit_full_printf_strv(UNIT(s), c->argv);
1778 if (!argv) {
1779 r = -ENOMEM;
1780 goto fail;
1781 }
1782
1783 our_env = new0(char*, 5);
1784 if (!our_env) {
1785 r = -ENOMEM;
1786 goto fail;
1787 }
1788
1789 if (set_notify_socket)
1790 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1791 r = -ENOMEM;
1792 goto fail;
1793 }
1794
1795 if (s->main_pid > 0)
1796 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1797 r = -ENOMEM;
1798 goto fail;
1799 }
1800
1801 if (s->watchdog_usec > 0)
1802 if (asprintf(our_env + n_env++, "WATCHDOG_USEC=%llu", (unsigned long long) s->watchdog_usec) < 0) {
1803 r = -ENOMEM;
1804 goto fail;
1805 }
1806
1807 if (s->meta.manager->running_as != SYSTEMD_SYSTEM)
1808 if (asprintf(our_env + n_env++, "MANAGERPID=%lu", (unsigned long) getpid()) < 0) {
1809 r = -ENOMEM;
1810 goto fail;
1811 }
1812
1813 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1814 if (!final_env) {
1815 r = -ENOMEM;
1816 goto fail;
1817 }
1818
1819 r = exec_spawn(c,
1820 argv,
1821 &s->exec_context,
1822 fds, n_fds,
1823 final_env,
1824 apply_permissions,
1825 apply_chroot,
1826 apply_tty_stdin,
1827 UNIT(s)->manager->confirm_spawn,
1828 UNIT(s)->cgroup_bondings,
1829 UNIT(s)->cgroup_attributes,
1830 is_control ? "control" : NULL,
1831 UNIT(s)->id,
1832 s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
1833 &pid);
1834 if (r < 0)
1835 goto fail;
1836
1837 r = unit_watch_pid(UNIT(s), pid);
1838 if (r < 0)
1839 /* FIXME: we need to do something here */
1840 goto fail;
1841
1842 *_pid = pid;
1843
1844 return 0;
1845
1846 fail:
1847 if (timeout)
1848 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1849
1850 return r;
1851 }
1852
1853 static int main_pid_good(Service *s) {
1854 assert(s);
1855
1856 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1857 * don't know */
1858
1859 /* If we know the pid file, then lets just check if it is
1860 * still valid */
1861 if (s->main_pid_known) {
1862
1863 /* If it's an alien child let's check if it is still
1864 * alive ... */
1865 if (s->main_pid_alien)
1866 return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1867
1868 /* .. otherwise assume we'll get a SIGCHLD for it,
1869 * which we really should wait for to collect exit
1870 * status and code */
1871 return s->main_pid > 0;
1872 }
1873
1874 /* We don't know the pid */
1875 return -EAGAIN;
1876 }
1877
1878 static int control_pid_good(Service *s) {
1879 assert(s);
1880
1881 return s->control_pid > 0;
1882 }
1883
1884 static int cgroup_good(Service *s) {
1885 int r;
1886
1887 assert(s);
1888
1889 r = cgroup_bonding_is_empty_list(UNIT(s)->cgroup_bondings);
1890 if (r < 0)
1891 return r;
1892
1893 return !r;
1894 }
1895
1896 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1897 int r;
1898 assert(s);
1899
1900 if (f != SERVICE_SUCCESS)
1901 s->result = f;
1902
1903 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1904
1905 if (allow_restart &&
1906 !s->forbid_restart &&
1907 (s->restart == SERVICE_RESTART_ALWAYS ||
1908 (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1909 (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
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
1918 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->restart_usec, &s->timer_watch);
1919 if (r < 0)
1920 goto fail;
1921
1922 service_set_state(s, SERVICE_AUTO_RESTART);
1923 }
1924
1925 s->forbid_restart = false;
1926
1927 /* we want fresh tmpdirs in case service is started again immediately */
1928 exec_context_tmp_dirs_done(&s->exec_context);
1929
1930 return;
1931
1932 fail:
1933 log_warning_unit(UNIT(s)->id,
1934 "%s failed to run install restart timer: %s",
1935 UNIT(s)->id, strerror(-r));
1936 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1937 }
1938
1939 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
1940
1941 static void service_enter_stop_post(Service *s, ServiceResult f) {
1942 int r;
1943 assert(s);
1944
1945 if (f != SERVICE_SUCCESS)
1946 s->result = f;
1947
1948 service_unwatch_control_pid(s);
1949
1950 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1951 if (s->control_command) {
1952 s->control_command_id = SERVICE_EXEC_STOP_POST;
1953
1954 r = service_spawn(s,
1955 s->control_command,
1956 true,
1957 false,
1958 !s->permissions_start_only,
1959 !s->root_directory_start_only,
1960 true,
1961 false,
1962 true,
1963 &s->control_pid);
1964 if (r < 0)
1965 goto fail;
1966
1967
1968 service_set_state(s, SERVICE_STOP_POST);
1969 } else
1970 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1971
1972 return;
1973
1974 fail:
1975 log_warning_unit(UNIT(s)->id,
1976 "%s failed to run 'stop-post' task: %s",
1977 UNIT(s)->id, strerror(-r));
1978 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1979 }
1980
1981 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1982 int r;
1983
1984 assert(s);
1985
1986 if (f != SERVICE_SUCCESS)
1987 s->result = f;
1988
1989 r = unit_kill_context(
1990 UNIT(s),
1991 &s->kill_context,
1992 state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM,
1993 s->main_pid,
1994 s->control_pid,
1995 s->main_pid_alien);
1996 if (r < 0)
1997 goto fail;
1998
1999 if (r > 0) {
2000 if (s->timeout_stop_usec > 0) {
2001 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true,
2002 s->timeout_stop_usec, &s->timer_watch);
2003 if (r < 0)
2004 goto fail;
2005 }
2006
2007 service_set_state(s, state);
2008 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
2009 service_enter_stop_post(s, SERVICE_SUCCESS);
2010 else
2011 service_enter_dead(s, SERVICE_SUCCESS, true);
2012
2013 return;
2014
2015 fail:
2016 log_warning_unit(UNIT(s)->id,
2017 "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
2018
2019 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
2020 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
2021 else
2022 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2023 }
2024
2025 static void service_enter_stop(Service *s, ServiceResult f) {
2026 int r;
2027
2028 assert(s);
2029
2030 if (f != SERVICE_SUCCESS)
2031 s->result = f;
2032
2033 service_unwatch_control_pid(s);
2034
2035 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
2036 if (s->control_command) {
2037 s->control_command_id = SERVICE_EXEC_STOP;
2038
2039 r = service_spawn(s,
2040 s->control_command,
2041 true,
2042 false,
2043 !s->permissions_start_only,
2044 !s->root_directory_start_only,
2045 false,
2046 false,
2047 true,
2048 &s->control_pid);
2049 if (r < 0)
2050 goto fail;
2051
2052 service_set_state(s, SERVICE_STOP);
2053 } else
2054 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2055
2056 return;
2057
2058 fail:
2059 log_warning_unit(UNIT(s)->id,
2060 "%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2061 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2062 }
2063
2064 static void service_enter_running(Service *s, ServiceResult f) {
2065 int main_pid_ok, cgroup_ok;
2066 assert(s);
2067
2068 if (f != SERVICE_SUCCESS)
2069 s->result = f;
2070
2071 main_pid_ok = main_pid_good(s);
2072 cgroup_ok = cgroup_good(s);
2073
2074 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2075 (s->bus_name_good || s->type != SERVICE_DBUS))
2076 service_set_state(s, SERVICE_RUNNING);
2077 else if (s->remain_after_exit)
2078 service_set_state(s, SERVICE_EXITED);
2079 else
2080 service_enter_stop(s, SERVICE_SUCCESS);
2081 }
2082
2083 static void service_enter_start_post(Service *s) {
2084 int r;
2085 assert(s);
2086
2087 service_unwatch_control_pid(s);
2088
2089 if (s->watchdog_usec > 0)
2090 service_reset_watchdog(s);
2091
2092 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
2093 if (s->control_command) {
2094 s->control_command_id = SERVICE_EXEC_START_POST;
2095
2096 r = service_spawn(s,
2097 s->control_command,
2098 true,
2099 false,
2100 !s->permissions_start_only,
2101 !s->root_directory_start_only,
2102 false,
2103 false,
2104 true,
2105 &s->control_pid);
2106 if (r < 0)
2107 goto fail;
2108
2109 service_set_state(s, SERVICE_START_POST);
2110 } else
2111 service_enter_running(s, SERVICE_SUCCESS);
2112
2113 return;
2114
2115 fail:
2116 log_warning_unit(UNIT(s)->id,
2117 "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2118 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2119 }
2120
2121 static void service_enter_start(Service *s) {
2122 pid_t pid;
2123 int r;
2124 ExecCommand *c;
2125
2126 assert(s);
2127
2128 assert(s->exec_command[SERVICE_EXEC_START]);
2129 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2130
2131 if (s->type == SERVICE_FORKING)
2132 service_unwatch_control_pid(s);
2133 else
2134 service_unwatch_main_pid(s);
2135
2136 /* We want to ensure that nobody leaks processes from
2137 * START_PRE here, so let's go on a killing spree, People
2138 * should not spawn long running processes from START_PRE. */
2139 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, true, NULL, "control");
2140
2141 if (s->type == SERVICE_FORKING) {
2142 s->control_command_id = SERVICE_EXEC_START;
2143 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2144
2145 s->main_command = NULL;
2146 } else {
2147 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2148 s->control_command = NULL;
2149
2150 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2151 }
2152
2153 r = service_spawn(s,
2154 c,
2155 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS ||
2156 s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
2157 true,
2158 true,
2159 true,
2160 true,
2161 s->notify_access != NOTIFY_NONE,
2162 false,
2163 &pid);
2164 if (r < 0)
2165 goto fail;
2166
2167 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
2168 /* For simple services we immediately start
2169 * the START_POST binaries. */
2170
2171 service_set_main_pid(s, pid);
2172 service_enter_start_post(s);
2173
2174 } else if (s->type == SERVICE_FORKING) {
2175
2176 /* For forking services we wait until the start
2177 * process exited. */
2178
2179 s->control_pid = pid;
2180 service_set_state(s, SERVICE_START);
2181
2182 } else if (s->type == SERVICE_ONESHOT ||
2183 s->type == SERVICE_DBUS ||
2184 s->type == SERVICE_NOTIFY) {
2185
2186 /* For oneshot services we wait until the start
2187 * process exited, too, but it is our main process. */
2188
2189 /* For D-Bus services we know the main pid right away,
2190 * but wait for the bus name to appear on the
2191 * bus. Notify services are similar. */
2192
2193 service_set_main_pid(s, pid);
2194 service_set_state(s, SERVICE_START);
2195 } else
2196 assert_not_reached("Unknown service type");
2197
2198 return;
2199
2200 fail:
2201 log_warning_unit(UNIT(s)->id,
2202 "%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2203 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2204 }
2205
2206 static void service_enter_start_pre(Service *s) {
2207 int r;
2208
2209 assert(s);
2210
2211 service_unwatch_control_pid(s);
2212
2213 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
2214 if (s->control_command) {
2215
2216 /* Before we start anything, let's clear up what might
2217 * be left from previous runs. */
2218 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL,
2219 true,true, NULL, "control");
2220
2221 s->control_command_id = SERVICE_EXEC_START_PRE;
2222
2223 r = service_spawn(s,
2224 s->control_command,
2225 true,
2226 false,
2227 !s->permissions_start_only,
2228 !s->root_directory_start_only,
2229 true,
2230 false,
2231 true,
2232 &s->control_pid);
2233 if (r < 0)
2234 goto fail;
2235
2236 service_set_state(s, SERVICE_START_PRE);
2237 } else
2238 service_enter_start(s);
2239
2240 return;
2241
2242 fail:
2243 log_warning_unit(UNIT(s)->id,
2244 "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2245 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2246 }
2247
2248 static void service_enter_restart(Service *s) {
2249 int r;
2250 DBusError error;
2251
2252 assert(s);
2253 dbus_error_init(&error);
2254
2255 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2256 /* Don't restart things if we are going down anyway */
2257 log_info_unit(UNIT(s)->id,
2258 "Stop job pending for unit, delaying automatic restart.");
2259
2260 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->restart_usec, &s->timer_watch);
2261 if (r < 0)
2262 goto fail;
2263
2264 return;
2265 }
2266
2267 /* Any units that are bound to this service must also be
2268 * restarted. We use JOB_RESTART (instead of the more obvious
2269 * JOB_START) here so that those dependency jobs will be added
2270 * as well. */
2271 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
2272 if (r < 0)
2273 goto fail;
2274
2275 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2276 * it will be canceled as part of the service_stop() call that
2277 * is executed as part of JOB_RESTART. */
2278
2279 log_debug_unit(UNIT(s)->id,
2280 "%s scheduled restart job.", UNIT(s)->id);
2281 return;
2282
2283 fail:
2284 log_warning_unit(UNIT(s)->id,
2285 "%s failed to schedule restart job: %s",
2286 UNIT(s)->id, bus_error(&error, -r));
2287 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2288
2289 dbus_error_free(&error);
2290 }
2291
2292 static void service_enter_reload(Service *s) {
2293 int r;
2294
2295 assert(s);
2296
2297 service_unwatch_control_pid(s);
2298
2299 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2300 if (s->control_command) {
2301 s->control_command_id = SERVICE_EXEC_RELOAD;
2302
2303 r = service_spawn(s,
2304 s->control_command,
2305 true,
2306 false,
2307 !s->permissions_start_only,
2308 !s->root_directory_start_only,
2309 false,
2310 false,
2311 true,
2312 &s->control_pid);
2313 if (r < 0)
2314 goto fail;
2315
2316 service_set_state(s, SERVICE_RELOAD);
2317 } else
2318 service_enter_running(s, SERVICE_SUCCESS);
2319
2320 return;
2321
2322 fail:
2323 log_warning_unit(UNIT(s)->id,
2324 "%s failed to run 'reload' task: %s",
2325 UNIT(s)->id, strerror(-r));
2326 s->reload_result = SERVICE_FAILURE_RESOURCES;
2327 service_enter_running(s, SERVICE_SUCCESS);
2328 }
2329
2330 static void service_run_next_control(Service *s) {
2331 int r;
2332
2333 assert(s);
2334 assert(s->control_command);
2335 assert(s->control_command->command_next);
2336
2337 assert(s->control_command_id != SERVICE_EXEC_START);
2338
2339 s->control_command = s->control_command->command_next;
2340 service_unwatch_control_pid(s);
2341
2342 r = service_spawn(s,
2343 s->control_command,
2344 true,
2345 false,
2346 !s->permissions_start_only,
2347 !s->root_directory_start_only,
2348 s->control_command_id == SERVICE_EXEC_START_PRE ||
2349 s->control_command_id == SERVICE_EXEC_STOP_POST,
2350 false,
2351 true,
2352 &s->control_pid);
2353 if (r < 0)
2354 goto fail;
2355
2356 return;
2357
2358 fail:
2359 log_warning_unit(UNIT(s)->id,
2360 "%s failed to run next control task: %s",
2361 UNIT(s)->id, strerror(-r));
2362
2363 if (s->state == SERVICE_START_PRE)
2364 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2365 else if (s->state == SERVICE_STOP)
2366 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2367 else if (s->state == SERVICE_STOP_POST)
2368 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2369 else if (s->state == SERVICE_RELOAD) {
2370 s->reload_result = SERVICE_FAILURE_RESOURCES;
2371 service_enter_running(s, SERVICE_SUCCESS);
2372 } else
2373 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2374 }
2375
2376 static void service_run_next_main(Service *s) {
2377 pid_t pid;
2378 int r;
2379
2380 assert(s);
2381 assert(s->main_command);
2382 assert(s->main_command->command_next);
2383 assert(s->type == SERVICE_ONESHOT);
2384
2385 s->main_command = s->main_command->command_next;
2386 service_unwatch_main_pid(s);
2387
2388 r = service_spawn(s,
2389 s->main_command,
2390 true,
2391 true,
2392 true,
2393 true,
2394 true,
2395 s->notify_access != NOTIFY_NONE,
2396 false,
2397 &pid);
2398 if (r < 0)
2399 goto fail;
2400
2401 service_set_main_pid(s, pid);
2402
2403 return;
2404
2405 fail:
2406 log_warning_unit(UNIT(s)->id,
2407 "%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2408 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2409 }
2410
2411 static int service_start_limit_test(Service *s) {
2412 assert(s);
2413
2414 if (ratelimit_test(&s->start_limit))
2415 return 0;
2416
2417 switch (s->start_limit_action) {
2418
2419 case SERVICE_START_LIMIT_NONE:
2420 log_warning_unit(UNIT(s)->id,
2421 "%s start request repeated too quickly, refusing to start.",
2422 UNIT(s)->id);
2423 break;
2424
2425 case SERVICE_START_LIMIT_REBOOT: {
2426 DBusError error;
2427 int r;
2428
2429 dbus_error_init(&error);
2430
2431 log_warning_unit(UNIT(s)->id,
2432 "%s start request repeated too quickly, rebooting.", UNIT(s)->id);
2433
2434 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START,
2435 SPECIAL_REBOOT_TARGET, JOB_REPLACE,
2436 true, &error, NULL);
2437 if (r < 0) {
2438 log_error_unit(UNIT(s)->id,
2439 "Failed to reboot: %s.", bus_error(&error, r));
2440 dbus_error_free(&error);
2441 }
2442
2443 break;
2444 }
2445
2446 case SERVICE_START_LIMIT_REBOOT_FORCE:
2447 log_warning_unit(UNIT(s)->id,
2448 "%s start request repeated too quickly, forcibly rebooting.", UNIT(s)->id);
2449 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2450 break;
2451
2452 case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
2453 log_warning_unit(UNIT(s)->id,
2454 "%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
2455 sync();
2456 reboot(RB_AUTOBOOT);
2457 break;
2458
2459 default:
2460 log_error_unit(UNIT(s)->id,
2461 "start limit action=%i", s->start_limit_action);
2462 assert_not_reached("Unknown StartLimitAction.");
2463 }
2464
2465 return -ECANCELED;
2466 }
2467
2468 static int service_start(Unit *u) {
2469 Service *s = SERVICE(u);
2470 int r;
2471
2472 assert(s);
2473
2474 /* We cannot fulfill this request right now, try again later
2475 * please! */
2476 if (s->state == SERVICE_STOP ||
2477 s->state == SERVICE_STOP_SIGTERM ||
2478 s->state == SERVICE_STOP_SIGKILL ||
2479 s->state == SERVICE_STOP_POST ||
2480 s->state == SERVICE_FINAL_SIGTERM ||
2481 s->state == SERVICE_FINAL_SIGKILL)
2482 return -EAGAIN;
2483
2484 /* Already on it! */
2485 if (s->state == SERVICE_START_PRE ||
2486 s->state == SERVICE_START ||
2487 s->state == SERVICE_START_POST)
2488 return 0;
2489
2490 /* A service that will be restarted must be stopped first to
2491 * trigger BindsTo and/or OnFailure dependencies. If a user
2492 * does not want to wait for the holdoff time to elapse, the
2493 * service should be manually restarted, not started. We
2494 * simply return EAGAIN here, so that any start jobs stay
2495 * queued, and assume that the auto restart timer will
2496 * eventually trigger the restart. */
2497 if (s->state == SERVICE_AUTO_RESTART)
2498 return -EAGAIN;
2499
2500 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
2501
2502 /* Make sure we don't enter a busy loop of some kind. */
2503 r = service_start_limit_test(s);
2504 if (r < 0) {
2505 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
2506 return r;
2507 }
2508
2509 s->result = SERVICE_SUCCESS;
2510 s->reload_result = SERVICE_SUCCESS;
2511 s->main_pid_known = false;
2512 s->main_pid_alien = false;
2513 s->forbid_restart = false;
2514
2515 service_enter_start_pre(s);
2516 return 0;
2517 }
2518
2519 static int service_stop(Unit *u) {
2520 Service *s = SERVICE(u);
2521
2522 assert(s);
2523
2524 /* Don't create restart jobs from here. */
2525 s->forbid_restart = true;
2526
2527 /* Already on it */
2528 if (s->state == SERVICE_STOP ||
2529 s->state == SERVICE_STOP_SIGTERM ||
2530 s->state == SERVICE_STOP_SIGKILL ||
2531 s->state == SERVICE_STOP_POST ||
2532 s->state == SERVICE_FINAL_SIGTERM ||
2533 s->state == SERVICE_FINAL_SIGKILL)
2534 return 0;
2535
2536 /* A restart will be scheduled or is in progress. */
2537 if (s->state == SERVICE_AUTO_RESTART) {
2538 service_set_state(s, SERVICE_DEAD);
2539 return 0;
2540 }
2541
2542 /* If there's already something running we go directly into
2543 * kill mode. */
2544 if (s->state == SERVICE_START_PRE ||
2545 s->state == SERVICE_START ||
2546 s->state == SERVICE_START_POST ||
2547 s->state == SERVICE_RELOAD) {
2548 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2549 return 0;
2550 }
2551
2552 assert(s->state == SERVICE_RUNNING ||
2553 s->state == SERVICE_EXITED);
2554
2555 service_enter_stop(s, SERVICE_SUCCESS);
2556 return 0;
2557 }
2558
2559 static int service_reload(Unit *u) {
2560 Service *s = SERVICE(u);
2561
2562 assert(s);
2563
2564 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2565
2566 service_enter_reload(s);
2567 return 0;
2568 }
2569
2570 static bool service_can_reload(Unit *u) {
2571 Service *s = SERVICE(u);
2572
2573 assert(s);
2574
2575 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2576 }
2577
2578 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2579 Service *s = SERVICE(u);
2580
2581 assert(u);
2582 assert(f);
2583 assert(fds);
2584
2585 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2586 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2587 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2588
2589 if (s->control_pid > 0)
2590 unit_serialize_item_format(u, f, "control-pid", "%lu",
2591 (unsigned long) s->control_pid);
2592
2593 if (s->main_pid_known && s->main_pid > 0)
2594 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2595
2596 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2597
2598 if (s->status_text)
2599 unit_serialize_item(u, f, "status-text", s->status_text);
2600
2601 /* FIXME: There's a minor uncleanliness here: if there are
2602 * multiple commands attached here, we will start from the
2603 * first one again */
2604 if (s->control_command_id >= 0)
2605 unit_serialize_item(u, f, "control-command",
2606 service_exec_command_to_string(s->control_command_id));
2607
2608 if (s->socket_fd >= 0) {
2609 int copy;
2610
2611 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2612 return copy;
2613
2614 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2615 }
2616
2617 if (s->main_exec_status.pid > 0) {
2618 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu",
2619 (unsigned long) s->main_exec_status.pid);
2620 dual_timestamp_serialize(f, "main-exec-status-start",
2621 &s->main_exec_status.start_timestamp);
2622 dual_timestamp_serialize(f, "main-exec-status-exit",
2623 &s->main_exec_status.exit_timestamp);
2624
2625 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2626 unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
2627 s->main_exec_status.code);
2628 unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
2629 s->main_exec_status.status);
2630 }
2631 }
2632 if (dual_timestamp_is_set(&s->watchdog_timestamp))
2633 dual_timestamp_serialize(f, "watchdog-timestamp",
2634 &s->watchdog_timestamp);
2635
2636 if (s->exec_context.tmp_dir)
2637 unit_serialize_item(u, f, "tmp-dir", s->exec_context.tmp_dir);
2638
2639 if (s->exec_context.var_tmp_dir)
2640 unit_serialize_item(u, f, "var-tmp-dir", s->exec_context.var_tmp_dir);
2641
2642 return 0;
2643 }
2644
2645 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2646 Service *s = SERVICE(u);
2647
2648 assert(u);
2649 assert(key);
2650 assert(value);
2651 assert(fds);
2652
2653 if (streq(key, "state")) {
2654 ServiceState state;
2655
2656 state = service_state_from_string(value);
2657 if (state < 0)
2658 log_debug_unit(u->id, "Failed to parse state value %s", value);
2659 else
2660 s->deserialized_state = state;
2661 } else if (streq(key, "result")) {
2662 ServiceResult f;
2663
2664 f = service_result_from_string(value);
2665 if (f < 0)
2666 log_debug_unit(u->id, "Failed to parse result value %s", value);
2667 else if (f != SERVICE_SUCCESS)
2668 s->result = f;
2669
2670 } else if (streq(key, "reload-result")) {
2671 ServiceResult f;
2672
2673 f = service_result_from_string(value);
2674 if (f < 0)
2675 log_debug_unit(u->id, "Failed to parse reload result value %s", value);
2676 else if (f != SERVICE_SUCCESS)
2677 s->reload_result = f;
2678
2679 } else if (streq(key, "control-pid")) {
2680 pid_t pid;
2681
2682 if (parse_pid(value, &pid) < 0)
2683 log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
2684 else
2685 s->control_pid = pid;
2686 } else if (streq(key, "main-pid")) {
2687 pid_t pid;
2688
2689 if (parse_pid(value, &pid) < 0)
2690 log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
2691 else
2692 service_set_main_pid(s, (pid_t) pid);
2693 } else if (streq(key, "main-pid-known")) {
2694 int b;
2695
2696 b = parse_boolean(value);
2697 if (b < 0)
2698 log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
2699 else
2700 s->main_pid_known = b;
2701 } else if (streq(key, "status-text")) {
2702 char *t;
2703
2704 t = strdup(value);
2705 if (!t)
2706 log_oom();
2707 else {
2708 free(s->status_text);
2709 s->status_text = t;
2710 }
2711
2712 } else if (streq(key, "control-command")) {
2713 ServiceExecCommand id;
2714
2715 id = service_exec_command_from_string(value);
2716 if (id < 0)
2717 log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
2718 else {
2719 s->control_command_id = id;
2720 s->control_command = s->exec_command[id];
2721 }
2722 } else if (streq(key, "socket-fd")) {
2723 int fd;
2724
2725 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2726 log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
2727 else {
2728
2729 if (s->socket_fd >= 0)
2730 close_nointr_nofail(s->socket_fd);
2731 s->socket_fd = fdset_remove(fds, fd);
2732 }
2733 } else if (streq(key, "main-exec-status-pid")) {
2734 pid_t pid;
2735
2736 if (parse_pid(value, &pid) < 0)
2737 log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
2738 else
2739 s->main_exec_status.pid = pid;
2740 } else if (streq(key, "main-exec-status-code")) {
2741 int i;
2742
2743 if (safe_atoi(value, &i) < 0)
2744 log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
2745 else
2746 s->main_exec_status.code = i;
2747 } else if (streq(key, "main-exec-status-status")) {
2748 int i;
2749
2750 if (safe_atoi(value, &i) < 0)
2751 log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
2752 else
2753 s->main_exec_status.status = i;
2754 } else if (streq(key, "main-exec-status-start"))
2755 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2756 else if (streq(key, "main-exec-status-exit"))
2757 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2758 else if (streq(key, "watchdog-timestamp"))
2759 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2760 else if (streq(key, "tmp-dir")) {
2761 char *t;
2762
2763 t = strdup(value);
2764 if (!t)
2765 return log_oom();
2766
2767 s->exec_context.tmp_dir = t;
2768 } else if (streq(key, "var-tmp-dir")) {
2769 char *t;
2770
2771 t = strdup(value);
2772 if (!t)
2773 return log_oom();
2774
2775 s->exec_context.var_tmp_dir = t;
2776 } else
2777 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
2778
2779 return 0;
2780 }
2781
2782 static UnitActiveState service_active_state(Unit *u) {
2783 const UnitActiveState *table;
2784
2785 assert(u);
2786
2787 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2788
2789 return table[SERVICE(u)->state];
2790 }
2791
2792 static const char *service_sub_state_to_string(Unit *u) {
2793 assert(u);
2794
2795 return service_state_to_string(SERVICE(u)->state);
2796 }
2797
2798 static bool service_check_gc(Unit *u) {
2799 Service *s = SERVICE(u);
2800
2801 assert(s);
2802
2803 /* Never clean up services that still have a process around,
2804 * even if the service is formally dead. */
2805 if (cgroup_good(s) > 0 ||
2806 main_pid_good(s) > 0 ||
2807 control_pid_good(s) > 0)
2808 return true;
2809
2810 #ifdef HAVE_SYSV_COMPAT
2811 if (s->is_sysv)
2812 return true;
2813 #endif
2814
2815 return false;
2816 }
2817
2818 static bool service_check_snapshot(Unit *u) {
2819 Service *s = SERVICE(u);
2820
2821 assert(s);
2822
2823 return !s->got_socket_fd;
2824 }
2825
2826 static int service_retry_pid_file(Service *s) {
2827 int r;
2828
2829 assert(s->pid_file);
2830 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2831
2832 r = service_load_pid_file(s, false);
2833 if (r < 0)
2834 return r;
2835
2836 service_unwatch_pid_file(s);
2837
2838 service_enter_running(s, SERVICE_SUCCESS);
2839 return 0;
2840 }
2841
2842 static int service_watch_pid_file(Service *s) {
2843 int r;
2844
2845 log_debug_unit(UNIT(s)->id,
2846 "Setting watch for %s's PID file %s",
2847 UNIT(s)->id, s->pid_file_pathspec->path);
2848 r = path_spec_watch(s->pid_file_pathspec, UNIT(s));
2849 if (r < 0)
2850 goto fail;
2851
2852 /* the pidfile might have appeared just before we set the watch */
2853 log_debug_unit(UNIT(s)->id,
2854 "Trying to read %s's PID file %s in case it changed",
2855 UNIT(s)->id, s->pid_file_pathspec->path);
2856 service_retry_pid_file(s);
2857
2858 return 0;
2859 fail:
2860 log_error_unit(UNIT(s)->id,
2861 "Failed to set a watch for %s's PID file %s: %s",
2862 UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2863 service_unwatch_pid_file(s);
2864 return r;
2865 }
2866
2867 static int service_demand_pid_file(Service *s) {
2868 PathSpec *ps;
2869
2870 assert(s->pid_file);
2871 assert(!s->pid_file_pathspec);
2872
2873 ps = new0(PathSpec, 1);
2874 if (!ps)
2875 return -ENOMEM;
2876
2877 ps->path = strdup(s->pid_file);
2878 if (!ps->path) {
2879 free(ps);
2880 return -ENOMEM;
2881 }
2882
2883 path_kill_slashes(ps->path);
2884
2885 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2886 * keep their PID file open all the time. */
2887 ps->type = PATH_MODIFIED;
2888 ps->inotify_fd = -1;
2889
2890 s->pid_file_pathspec = ps;
2891
2892 return service_watch_pid_file(s);
2893 }
2894
2895 static void service_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
2896 Service *s = SERVICE(u);
2897
2898 assert(s);
2899 assert(fd >= 0);
2900 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2901 assert(s->pid_file_pathspec);
2902 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2903
2904 log_debug_unit(u->id, "inotify event for %s", u->id);
2905
2906 if (path_spec_fd_event(s->pid_file_pathspec, events) < 0)
2907 goto fail;
2908
2909 if (service_retry_pid_file(s) == 0)
2910 return;
2911
2912 if (service_watch_pid_file(s) < 0)
2913 goto fail;
2914
2915 return;
2916 fail:
2917 service_unwatch_pid_file(s);
2918 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2919 }
2920
2921 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2922 Service *s = SERVICE(u);
2923 ServiceResult f;
2924
2925 assert(s);
2926 assert(pid >= 0);
2927
2928 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2929 is_clean_exit_lsb(code, status, &s->success_status))
2930 f = SERVICE_SUCCESS;
2931 else if (code == CLD_EXITED)
2932 f = SERVICE_FAILURE_EXIT_CODE;
2933 else if (code == CLD_KILLED)
2934 f = SERVICE_FAILURE_SIGNAL;
2935 else if (code == CLD_DUMPED)
2936 f = SERVICE_FAILURE_CORE_DUMP;
2937 else
2938 assert_not_reached("Unknown code");
2939
2940 if (s->main_pid == pid) {
2941 /* Forking services may occasionally move to a new PID.
2942 * As long as they update the PID file before exiting the old
2943 * PID, they're fine. */
2944 if (service_load_pid_file(s, false) == 0)
2945 return;
2946
2947 s->main_pid = 0;
2948 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2949
2950 if (s->main_command) {
2951 /* If this is not a forking service than the
2952 * main process got started and hence we copy
2953 * the exit status so that it is recorded both
2954 * as main and as control process exit
2955 * status */
2956
2957 s->main_command->exec_status = s->main_exec_status;
2958
2959 if (s->main_command->ignore)
2960 f = SERVICE_SUCCESS;
2961 } else if (s->exec_command[SERVICE_EXEC_START]) {
2962
2963 /* If this is a forked process, then we should
2964 * ignore the return value if this was
2965 * configured for the starter process */
2966
2967 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2968 f = SERVICE_SUCCESS;
2969 }
2970
2971 log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2972 u->id,
2973 "MESSAGE=%s: main process exited, code=%s, status=%i/%s",
2974 u->id, sigchld_code_to_string(code), status,
2975 strna(code == CLD_EXITED
2976 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2977 : signal_to_string(status)),
2978 "EXIT_CODE=%s", sigchld_code_to_string(code),
2979 "EXIT_STATUS=%i", status,
2980 NULL);
2981
2982 if (f != SERVICE_SUCCESS)
2983 s->result = f;
2984
2985 if (s->main_command &&
2986 s->main_command->command_next &&
2987 f == SERVICE_SUCCESS) {
2988
2989 /* There is another command to *
2990 * execute, so let's do that. */
2991
2992 log_debug_unit(u->id,
2993 "%s running next main command for state %s",
2994 u->id, service_state_to_string(s->state));
2995 service_run_next_main(s);
2996
2997 } else {
2998
2999 /* The service exited, so the service is officially
3000 * gone. */
3001 s->main_command = NULL;
3002
3003 switch (s->state) {
3004
3005 case SERVICE_START_POST:
3006 case SERVICE_RELOAD:
3007 case SERVICE_STOP:
3008 /* Need to wait until the operation is
3009 * done */
3010 break;
3011
3012 case SERVICE_START:
3013 if (s->type == SERVICE_ONESHOT) {
3014 /* This was our main goal, so let's go on */
3015 if (f == SERVICE_SUCCESS)
3016 service_enter_start_post(s);
3017 else
3018 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3019 break;
3020 }
3021
3022 /* Fall through */
3023
3024 case SERVICE_RUNNING:
3025 service_enter_running(s, f);
3026 break;
3027
3028 case SERVICE_STOP_SIGTERM:
3029 case SERVICE_STOP_SIGKILL:
3030
3031 if (!control_pid_good(s))
3032 service_enter_stop_post(s, f);
3033
3034 /* If there is still a control process, wait for that first */
3035 break;
3036
3037 default:
3038 assert_not_reached("Uh, main process died at wrong time.");
3039 }
3040 }
3041
3042 } else if (s->control_pid == pid) {
3043
3044 s->control_pid = 0;
3045
3046 if (s->control_command) {
3047 exec_status_exit(&s->control_command->exec_status,
3048 &s->exec_context, pid, code, status);
3049
3050 if (s->control_command->ignore)
3051 f = SERVICE_SUCCESS;
3052 }
3053
3054 log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
3055 "%s: control process exited, code=%s status=%i",
3056 u->id, sigchld_code_to_string(code), status);
3057
3058 if (f != SERVICE_SUCCESS)
3059 s->result = f;
3060
3061 /* Immediately get rid of the cgroup, so that the
3062 * kernel doesn't delay the cgroup empty messages for
3063 * the service cgroup any longer than necessary */
3064 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL,
3065 true, true, NULL, "control");
3066
3067 if (s->control_command &&
3068 s->control_command->command_next &&
3069 f == SERVICE_SUCCESS) {
3070
3071 /* There is another command to *
3072 * execute, so let's do that. */
3073
3074 log_debug_unit(u->id,
3075 "%s running next control command for state %s",
3076 u->id, service_state_to_string(s->state));
3077 service_run_next_control(s);
3078
3079 } else {
3080 /* No further commands for this step, so let's
3081 * figure out what to do next */
3082
3083 s->control_command = NULL;
3084 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3085
3086 log_debug_unit(u->id,
3087 "%s got final SIGCHLD for state %s",
3088 u->id, service_state_to_string(s->state));
3089
3090 switch (s->state) {
3091
3092 case SERVICE_START_PRE:
3093 if (f == SERVICE_SUCCESS)
3094 service_enter_start(s);
3095 else
3096 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3097 break;
3098
3099 case SERVICE_START:
3100 if (s->type != SERVICE_FORKING)
3101 /* Maybe spurious event due to a reload that changed the type? */
3102 break;
3103
3104 if (f != SERVICE_SUCCESS) {
3105 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3106 break;
3107 }
3108
3109 if (s->pid_file) {
3110 bool has_start_post;
3111 int r;
3112
3113 /* Let's try to load the pid file here if we can.
3114 * The PID file might actually be created by a START_POST
3115 * script. In that case don't worry if the loading fails. */
3116
3117 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3118 r = service_load_pid_file(s, !has_start_post);
3119 if (!has_start_post && r < 0) {
3120 r = service_demand_pid_file(s);
3121 if (r < 0 || !cgroup_good(s))
3122 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3123 break;
3124 }
3125 } else
3126 service_search_main_pid(s);
3127
3128 service_enter_start_post(s);
3129 break;
3130
3131 case SERVICE_START_POST:
3132 if (f != SERVICE_SUCCESS) {
3133 service_enter_stop(s, f);
3134 break;
3135 }
3136
3137 if (s->pid_file) {
3138 int r;
3139
3140 r = service_load_pid_file(s, true);
3141 if (r < 0) {
3142 r = service_demand_pid_file(s);
3143 if (r < 0 || !cgroup_good(s))
3144 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3145 break;
3146 }
3147 } else
3148 service_search_main_pid(s);
3149
3150 service_enter_running(s, SERVICE_SUCCESS);
3151 break;
3152
3153 case SERVICE_RELOAD:
3154 if (f == SERVICE_SUCCESS) {
3155 service_load_pid_file(s, true);
3156 service_search_main_pid(s);
3157 }
3158
3159 s->reload_result = f;
3160 service_enter_running(s, SERVICE_SUCCESS);
3161 break;
3162
3163 case SERVICE_STOP:
3164 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3165 break;
3166
3167 case SERVICE_STOP_SIGTERM:
3168 case SERVICE_STOP_SIGKILL:
3169 if (main_pid_good(s) <= 0)
3170 service_enter_stop_post(s, f);
3171
3172 /* If there is still a service
3173 * process around, wait until
3174 * that one quit, too */
3175 break;
3176
3177 case SERVICE_STOP_POST:
3178 case SERVICE_FINAL_SIGTERM:
3179 case SERVICE_FINAL_SIGKILL:
3180 service_enter_dead(s, f, true);
3181 break;
3182
3183 default:
3184 assert_not_reached("Uh, control process died at wrong time.");
3185 }
3186 }
3187 }
3188
3189 /* Notify clients about changed exit status */
3190 unit_add_to_dbus_queue(u);
3191 }
3192
3193 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
3194 Service *s = SERVICE(u);
3195
3196 assert(s);
3197 assert(elapsed == 1);
3198
3199 if (w == &s->watchdog_watch) {
3200 service_handle_watchdog(s);
3201 return;
3202 }
3203
3204 assert(w == &s->timer_watch);
3205
3206 switch (s->state) {
3207
3208 case SERVICE_START_PRE:
3209 case SERVICE_START:
3210 log_warning_unit(u->id,
3211 "%s operation timed out. Terminating.", u->id);
3212 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3213 break;
3214
3215 case SERVICE_START_POST:
3216 log_warning_unit(u->id,
3217 "%s operation timed out. Stopping.", u->id);
3218 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3219 break;
3220
3221 case SERVICE_RELOAD:
3222 log_warning_unit(u->id,
3223 "%s operation timed out. Stopping.", u->id);
3224 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3225 service_enter_running(s, SERVICE_SUCCESS);
3226 break;
3227
3228 case SERVICE_STOP:
3229 log_warning_unit(u->id,
3230 "%s stopping timed out. Terminating.", u->id);
3231 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3232 break;
3233
3234 case SERVICE_STOP_SIGTERM:
3235 if (s->kill_context.send_sigkill) {
3236 log_warning_unit(u->id,
3237 "%s stopping timed out. Killing.", u->id);
3238 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3239 } else {
3240 log_warning_unit(u->id,
3241 "%s stopping timed out. Skipping SIGKILL.", u->id);
3242 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3243 }
3244
3245 break;
3246
3247 case SERVICE_STOP_SIGKILL:
3248 /* Uh, we sent a SIGKILL and it is still not gone?
3249 * Must be something we cannot kill, so let's just be
3250 * weirded out and continue */
3251
3252 log_warning_unit(u->id,
3253 "%s still around after SIGKILL. Ignoring.", u->id);
3254 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3255 break;
3256
3257 case SERVICE_STOP_POST:
3258 log_warning_unit(u->id,
3259 "%s stopping timed out (2). Terminating.", u->id);
3260 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3261 break;
3262
3263 case SERVICE_FINAL_SIGTERM:
3264 if (s->kill_context.send_sigkill) {
3265 log_warning_unit(u->id,
3266 "%s stopping timed out (2). Killing.", u->id);
3267 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3268 } else {
3269 log_warning_unit(u->id,
3270 "%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.",
3271 u->id);
3272 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3273 }
3274
3275 break;
3276
3277 case SERVICE_FINAL_SIGKILL:
3278 log_warning_unit(u->id,
3279 "%s still around after SIGKILL (2). Entering failed mode.", u->id);
3280 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3281 break;
3282
3283 case SERVICE_AUTO_RESTART:
3284 log_info_unit(u->id,
3285 "%s holdoff time over, scheduling restart.", u->id);
3286 service_enter_restart(s);
3287 break;
3288
3289 default:
3290 assert_not_reached("Timeout at wrong time.");
3291 }
3292 }
3293
3294 static void service_cgroup_notify_event(Unit *u) {
3295 Service *s = SERVICE(u);
3296
3297 assert(u);
3298
3299 log_debug_unit(u->id,
3300 "%s: cgroup is empty", u->id);
3301
3302 switch (s->state) {
3303
3304 /* Waiting for SIGCHLD is usually more interesting,
3305 * because it includes return codes/signals. Which is
3306 * why we ignore the cgroup events for most cases,
3307 * except when we don't know pid which to expect the
3308 * SIGCHLD for. */
3309
3310 case SERVICE_START:
3311 case SERVICE_START_POST:
3312 /* If we were hoping for the daemon to write its PID file,
3313 * we can give up now. */
3314 if (s->pid_file_pathspec) {
3315 log_warning_unit(u->id,
3316 "%s never wrote its PID file. Failing.", UNIT(s)->id);
3317 service_unwatch_pid_file(s);
3318 if (s->state == SERVICE_START)
3319 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3320 else
3321 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3322 }
3323 break;
3324
3325 case SERVICE_RUNNING:
3326 /* service_enter_running() will figure out what to do */
3327 service_enter_running(s, SERVICE_SUCCESS);
3328 break;
3329
3330 case SERVICE_STOP_SIGTERM:
3331 case SERVICE_STOP_SIGKILL:
3332
3333 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3334 service_enter_stop_post(s, SERVICE_SUCCESS);
3335
3336 break;
3337
3338 case SERVICE_FINAL_SIGTERM:
3339 case SERVICE_FINAL_SIGKILL:
3340 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3341 service_enter_dead(s, SERVICE_SUCCESS, true);
3342
3343 break;
3344
3345 default:
3346 ;
3347 }
3348 }
3349
3350 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3351 Service *s = SERVICE(u);
3352 const char *e;
3353
3354 assert(u);
3355
3356 if (s->notify_access == NOTIFY_NONE) {
3357 log_warning_unit(u->id,
3358 "%s: Got notification message from PID %lu, but reception is disabled.",
3359 u->id, (unsigned long) pid);
3360 return;
3361 }
3362
3363 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3364 log_warning_unit(u->id,
3365 "%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3366 u->id, (unsigned long) pid, (unsigned long) s->main_pid);
3367 return;
3368 }
3369
3370 log_debug_unit(u->id,
3371 "%s: Got message", u->id);
3372
3373 /* Interpret MAINPID= */
3374 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3375 (s->state == SERVICE_START ||
3376 s->state == SERVICE_START_POST ||
3377 s->state == SERVICE_RUNNING ||
3378 s->state == SERVICE_RELOAD)) {
3379
3380 if (parse_pid(e + 8, &pid) < 0)
3381 log_warning_unit(u->id,
3382 "Failed to parse notification message %s", e);
3383 else {
3384 log_debug_unit(u->id,
3385 "%s: got %s", u->id, e);
3386 service_set_main_pid(s, pid);
3387 }
3388 }
3389
3390 /* Interpret READY= */
3391 if (s->type == SERVICE_NOTIFY &&
3392 s->state == SERVICE_START &&
3393 strv_find(tags, "READY=1")) {
3394 log_debug_unit(u->id,
3395 "%s: got READY=1", u->id);
3396
3397 service_enter_start_post(s);
3398 }
3399
3400 /* Interpret STATUS= */
3401 e = strv_find_prefix(tags, "STATUS=");
3402 if (e) {
3403 char *t;
3404
3405 if (e[7]) {
3406
3407 if (!utf8_is_valid(e+7)) {
3408 log_warning_unit(u->id,
3409 "Status message in notification is not UTF-8 clean.");
3410 return;
3411 }
3412
3413 t = strdup(e+7);
3414 if (!t) {
3415 log_error_unit(u->id,
3416 "Failed to allocate string.");
3417 return;
3418 }
3419
3420 log_debug_unit(u->id,
3421 "%s: got %s", u->id, e);
3422
3423 free(s->status_text);
3424 s->status_text = t;
3425 } else {
3426 free(s->status_text);
3427 s->status_text = NULL;
3428 }
3429
3430 }
3431 if (strv_find(tags, "WATCHDOG=1")) {
3432 log_debug_unit(u->id,
3433 "%s: got WATCHDOG=1", u->id);
3434 if (dual_timestamp_is_set(&s->watchdog_timestamp))
3435 service_reset_watchdog(s);
3436 }
3437
3438 /* Notify clients about changed status or main pid */
3439 unit_add_to_dbus_queue(u);
3440 }
3441
3442 #ifdef HAVE_SYSV_COMPAT
3443
3444 static int service_enumerate(Manager *m) {
3445 char **p;
3446 unsigned i;
3447 DIR _cleanup_closedir_ *d = NULL;
3448 char _cleanup_free_ *path = NULL, *fpath = NULL, *name = NULL;
3449 Set *runlevel_services[ELEMENTSOF(rcnd_table)];
3450 Set _cleanup_set_free_ *shutdown_services = NULL;
3451 Unit *service;
3452 Iterator j;
3453 int r;
3454
3455 assert(m);
3456
3457 if (m->running_as != SYSTEMD_SYSTEM)
3458 return 0;
3459
3460 zero(runlevel_services);
3461
3462 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3463 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3464 struct dirent *de;
3465
3466 free(path);
3467 path = strjoin(*p, "/", rcnd_table[i].path, NULL);
3468 if (!path) {
3469 r = -ENOMEM;
3470 goto finish;
3471 }
3472
3473 if (d)
3474 closedir(d);
3475
3476 d = opendir(path);
3477 if (!d) {
3478 if (errno != ENOENT)
3479 log_warning("opendir(%s) failed: %s", path, strerror(errno));
3480
3481 continue;
3482 }
3483
3484 while ((de = readdir(d))) {
3485 int a, b;
3486
3487 if (ignore_file(de->d_name))
3488 continue;
3489
3490 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3491 continue;
3492
3493 if (strlen(de->d_name) < 4)
3494 continue;
3495
3496 a = undecchar(de->d_name[1]);
3497 b = undecchar(de->d_name[2]);
3498
3499 if (a < 0 || b < 0)
3500 continue;
3501
3502 free(fpath);
3503 fpath = strjoin(path, "/", de->d_name, NULL);
3504 if (!fpath) {
3505 r = -ENOMEM;
3506 goto finish;
3507 }
3508
3509 if (access(fpath, X_OK) < 0) {
3510
3511 if (errno != ENOENT)
3512 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3513
3514 continue;
3515 }
3516
3517 free(name);
3518 name = sysv_translate_name(de->d_name + 3);
3519 if (!name) {
3520 r = log_oom();
3521 goto finish;
3522 }
3523
3524 r = manager_load_unit_prepare(m, name, NULL, NULL, &service);
3525 if (r < 0) {
3526 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3527 continue;
3528 }
3529
3530 if (de->d_name[0] == 'S') {
3531
3532 if (rcnd_table[i].type == RUNLEVEL_UP) {
3533 SERVICE(service)->sysv_start_priority_from_rcnd =
3534 MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3535
3536 SERVICE(service)->sysv_enabled = true;
3537 }
3538
3539 r = set_ensure_allocated(&runlevel_services[i],
3540 trivial_hash_func, trivial_compare_func);
3541 if (r < 0)
3542 goto finish;
3543
3544 r = set_put(runlevel_services[i], service);
3545 if (r < 0)
3546 goto finish;
3547
3548 } else if (de->d_name[0] == 'K' &&
3549 (rcnd_table[i].type == RUNLEVEL_DOWN)) {
3550
3551 r = set_ensure_allocated(&shutdown_services,
3552 trivial_hash_func, trivial_compare_func);
3553 if (r < 0)
3554 goto finish;
3555
3556 r = set_put(shutdown_services, service);
3557 if (r < 0)
3558 goto finish;
3559 }
3560 }
3561 }
3562
3563 /* Now we loaded all stubs and are aware of the lowest
3564 start-up priority for all services, not let's actually load
3565 the services, this will also tell us which services are
3566 actually native now */
3567 manager_dispatch_load_queue(m);
3568
3569 /* If this is a native service, rely on native ways to pull in
3570 * a service, don't pull it in via sysv rcN.d links. */
3571 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3572 SET_FOREACH(service, runlevel_services[i], j) {
3573 service = unit_follow_merge(service);
3574
3575 if (service->fragment_path)
3576 continue;
3577
3578 r = unit_add_two_dependencies_by_name_inverse(
3579 service, UNIT_AFTER, UNIT_WANTS,
3580 rcnd_table[i].target, NULL, true);
3581 if (r < 0)
3582 goto finish;
3583 }
3584
3585 /* We honour K links only for halt/reboot. For the normal
3586 * runlevels we assume the stop jobs will be implicitly added
3587 * by the core logic. Also, we don't really distinguish here
3588 * between the runlevels 0 and 6 and just add them to the
3589 * special shutdown target. */
3590 SET_FOREACH(service, shutdown_services, j) {
3591 service = unit_follow_merge(service);
3592
3593 if (service->fragment_path)
3594 continue;
3595
3596 r = unit_add_two_dependencies_by_name(
3597 service, UNIT_BEFORE, UNIT_CONFLICTS,
3598 SPECIAL_SHUTDOWN_TARGET, NULL, true);
3599 if (r < 0)
3600 goto finish;
3601 }
3602
3603 r = 0;
3604
3605 finish:
3606
3607 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3608 set_free(runlevel_services[i]);
3609
3610 return r;
3611 }
3612 #endif
3613
3614 static void service_bus_name_owner_change(
3615 Unit *u,
3616 const char *name,
3617 const char *old_owner,
3618 const char *new_owner) {
3619
3620 Service *s = SERVICE(u);
3621
3622 assert(s);
3623 assert(name);
3624
3625 assert(streq(s->bus_name, name));
3626 assert(old_owner || new_owner);
3627
3628 if (old_owner && new_owner)
3629 log_debug_unit(u->id,
3630 "%s's D-Bus name %s changed owner from %s to %s",
3631 u->id, name, old_owner, new_owner);
3632 else if (old_owner)
3633 log_debug_unit(u->id,
3634 "%s's D-Bus name %s no longer registered by %s",
3635 u->id, name, old_owner);
3636 else
3637 log_debug_unit(u->id,
3638 "%s's D-Bus name %s now registered by %s",
3639 u->id, name, new_owner);
3640
3641 s->bus_name_good = !!new_owner;
3642
3643 if (s->type == SERVICE_DBUS) {
3644
3645 /* service_enter_running() will figure out what to
3646 * do */
3647 if (s->state == SERVICE_RUNNING)
3648 service_enter_running(s, SERVICE_SUCCESS);
3649 else if (s->state == SERVICE_START && new_owner)
3650 service_enter_start_post(s);
3651
3652 } else if (new_owner &&
3653 s->main_pid <= 0 &&
3654 (s->state == SERVICE_START ||
3655 s->state == SERVICE_START_POST ||
3656 s->state == SERVICE_RUNNING ||
3657 s->state == SERVICE_RELOAD)) {
3658
3659 /* Try to acquire PID from bus service */
3660 log_debug_unit(u->id,
3661 "Trying to acquire PID from D-Bus name...");
3662
3663 bus_query_pid(u->manager, name);
3664 }
3665 }
3666
3667 static void service_bus_query_pid_done(
3668 Unit *u,
3669 const char *name,
3670 pid_t pid) {
3671
3672 Service *s = SERVICE(u);
3673
3674 assert(s);
3675 assert(name);
3676
3677 log_debug_unit(u->id,
3678 "%s's D-Bus name %s is now owned by process %u",
3679 u->id, name, (unsigned) pid);
3680
3681 if (s->main_pid <= 0 &&
3682 (s->state == SERVICE_START ||
3683 s->state == SERVICE_START_POST ||
3684 s->state == SERVICE_RUNNING ||
3685 s->state == SERVICE_RELOAD))
3686 service_set_main_pid(s, pid);
3687 }
3688
3689 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3690
3691 assert(s);
3692 assert(fd >= 0);
3693
3694 /* This is called by the socket code when instantiating a new
3695 * service for a stream socket and the socket needs to be
3696 * configured. */
3697
3698 if (UNIT(s)->load_state != UNIT_LOADED)
3699 return -EINVAL;
3700
3701 if (s->socket_fd >= 0)
3702 return -EBUSY;
3703
3704 if (s->state != SERVICE_DEAD)
3705 return -EAGAIN;
3706
3707 s->socket_fd = fd;
3708 s->got_socket_fd = true;
3709
3710 unit_ref_set(&s->accept_socket, UNIT(sock));
3711
3712 return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3713 }
3714
3715 static void service_reset_failed(Unit *u) {
3716 Service *s = SERVICE(u);
3717
3718 assert(s);
3719
3720 if (s->state == SERVICE_FAILED)
3721 service_set_state(s, SERVICE_DEAD);
3722
3723 s->result = SERVICE_SUCCESS;
3724 s->reload_result = SERVICE_SUCCESS;
3725
3726 RATELIMIT_RESET(s->start_limit);
3727 }
3728
3729 static int service_kill(Unit *u, KillWho who, int signo, DBusError *error) {
3730 Service *s = SERVICE(u);
3731 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3732 }
3733
3734 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3735 [SERVICE_DEAD] = "dead",
3736 [SERVICE_START_PRE] = "start-pre",
3737 [SERVICE_START] = "start",
3738 [SERVICE_START_POST] = "start-post",
3739 [SERVICE_RUNNING] = "running",
3740 [SERVICE_EXITED] = "exited",
3741 [SERVICE_RELOAD] = "reload",
3742 [SERVICE_STOP] = "stop",
3743 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3744 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3745 [SERVICE_STOP_POST] = "stop-post",
3746 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3747 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3748 [SERVICE_FAILED] = "failed",
3749 [SERVICE_AUTO_RESTART] = "auto-restart",
3750 };
3751
3752 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3753
3754 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3755 [SERVICE_RESTART_NO] = "no",
3756 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3757 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3758 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3759 [SERVICE_RESTART_ALWAYS] = "always"
3760 };
3761
3762 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3763
3764 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3765 [SERVICE_SIMPLE] = "simple",
3766 [SERVICE_FORKING] = "forking",
3767 [SERVICE_ONESHOT] = "oneshot",
3768 [SERVICE_DBUS] = "dbus",
3769 [SERVICE_NOTIFY] = "notify",
3770 [SERVICE_IDLE] = "idle"
3771 };
3772
3773 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3774
3775 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3776 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3777 [SERVICE_EXEC_START] = "ExecStart",
3778 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3779 [SERVICE_EXEC_RELOAD] = "ExecReload",
3780 [SERVICE_EXEC_STOP] = "ExecStop",
3781 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3782 };
3783
3784 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3785
3786 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3787 [NOTIFY_NONE] = "none",
3788 [NOTIFY_MAIN] = "main",
3789 [NOTIFY_ALL] = "all"
3790 };
3791
3792 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3793
3794 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3795 [SERVICE_SUCCESS] = "success",
3796 [SERVICE_FAILURE_RESOURCES] = "resources",
3797 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3798 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3799 [SERVICE_FAILURE_SIGNAL] = "signal",
3800 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3801 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3802 [SERVICE_FAILURE_START_LIMIT] = "start-limit"
3803 };
3804
3805 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3806
3807 static const char* const start_limit_action_table[_SERVICE_START_LIMIT_MAX] = {
3808 [SERVICE_START_LIMIT_NONE] = "none",
3809 [SERVICE_START_LIMIT_REBOOT] = "reboot",
3810 [SERVICE_START_LIMIT_REBOOT_FORCE] = "reboot-force",
3811 [SERVICE_START_LIMIT_REBOOT_IMMEDIATE] = "reboot-immediate"
3812 };
3813 DEFINE_STRING_TABLE_LOOKUP(start_limit_action, StartLimitAction);
3814
3815 const UnitVTable service_vtable = {
3816 .object_size = sizeof(Service),
3817
3818 .sections =
3819 "Unit\0"
3820 "Service\0"
3821 "Install\0",
3822
3823 .exec_context_offset = offsetof(Service, exec_context),
3824 .exec_section = "Service",
3825
3826 .init = service_init,
3827 .done = service_done,
3828 .load = service_load,
3829
3830 .coldplug = service_coldplug,
3831
3832 .dump = service_dump,
3833
3834 .start = service_start,
3835 .stop = service_stop,
3836 .reload = service_reload,
3837
3838 .can_reload = service_can_reload,
3839
3840 .kill = service_kill,
3841
3842 .serialize = service_serialize,
3843 .deserialize_item = service_deserialize_item,
3844
3845 .active_state = service_active_state,
3846 .sub_state_to_string = service_sub_state_to_string,
3847
3848 .check_gc = service_check_gc,
3849 .check_snapshot = service_check_snapshot,
3850
3851 .sigchld_event = service_sigchld_event,
3852 .timer_event = service_timer_event,
3853 .fd_event = service_fd_event,
3854
3855 .reset_failed = service_reset_failed,
3856
3857 .cgroup_notify_empty = service_cgroup_notify_event,
3858 .notify_message = service_notify_message,
3859
3860 .bus_name_owner_change = service_bus_name_owner_change,
3861 .bus_query_pid_done = service_bus_query_pid_done,
3862
3863 .bus_interface = "org.freedesktop.systemd1.Service",
3864 .bus_message_handler = bus_service_message_handler,
3865 .bus_invalidating_properties = bus_service_invalidating_properties,
3866
3867 #ifdef HAVE_SYSV_COMPAT
3868 .enumerate = service_enumerate,
3869 #endif
3870 .status_message_formats = {
3871 .starting_stopping = {
3872 [0] = "Starting %s...",
3873 [1] = "Stopping %s...",
3874 },
3875 .finished_start_job = {
3876 [JOB_DONE] = "Started %s.",
3877 [JOB_FAILED] = "Failed to start %s.",
3878 [JOB_DEPENDENCY] = "Dependency failed for %s.",
3879 [JOB_TIMEOUT] = "Timed out starting %s.",
3880 },
3881 .finished_stop_job = {
3882 [JOB_DONE] = "Stopped %s.",
3883 [JOB_FAILED] = "Stopped (with error) %s.",
3884 [JOB_TIMEOUT] = "Timed out stopping %s.",
3885 },
3886 },
3887 };
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