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core: unify kill code of mount, service, socket, swap units
[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
46 #ifdef HAVE_SYSV_COMPAT
47
48 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
49
50 typedef enum RunlevelType {
51 RUNLEVEL_UP,
52 RUNLEVEL_DOWN
53 } RunlevelType;
54
55 static const struct {
56 const char *path;
57 const char *target;
58 const RunlevelType type;
59 } rcnd_table[] = {
60 /* Standard SysV runlevels for start-up */
61 { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP },
62 { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
63 { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
64 { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
65 { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
66
67 /* Standard SysV runlevels for shutdown */
68 { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN },
69 { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }
70
71 /* Note that the order here matters, as we read the
72 directories in this order, and we want to make sure that
73 sysv_start_priority is known when we first load the
74 unit. And that value we only know from S links. Hence
75 UP must be read before DOWN */
76 };
77
78 #define RUNLEVELS_UP "12345"
79 #endif
80
81 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
82 [SERVICE_DEAD] = UNIT_INACTIVE,
83 [SERVICE_START_PRE] = UNIT_ACTIVATING,
84 [SERVICE_START] = UNIT_ACTIVATING,
85 [SERVICE_START_POST] = UNIT_ACTIVATING,
86 [SERVICE_RUNNING] = UNIT_ACTIVE,
87 [SERVICE_EXITED] = UNIT_ACTIVE,
88 [SERVICE_RELOAD] = UNIT_RELOADING,
89 [SERVICE_STOP] = UNIT_DEACTIVATING,
90 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
91 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
92 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
93 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
94 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
95 [SERVICE_FAILED] = UNIT_FAILED,
96 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
97 };
98
99 /* For Type=idle we never want to delay any other jobs, hence we
100 * consider idle jobs active as soon as we start working on them */
101 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
102 [SERVICE_DEAD] = UNIT_INACTIVE,
103 [SERVICE_START_PRE] = UNIT_ACTIVE,
104 [SERVICE_START] = UNIT_ACTIVE,
105 [SERVICE_START_POST] = UNIT_ACTIVE,
106 [SERVICE_RUNNING] = UNIT_ACTIVE,
107 [SERVICE_EXITED] = UNIT_ACTIVE,
108 [SERVICE_RELOAD] = UNIT_RELOADING,
109 [SERVICE_STOP] = UNIT_DEACTIVATING,
110 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
111 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
112 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
113 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
114 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
115 [SERVICE_FAILED] = UNIT_FAILED,
116 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
117 };
118
119 static void service_init(Unit *u) {
120 Service *s = SERVICE(u);
121
122 assert(u);
123 assert(u->load_state == UNIT_STUB);
124
125 s->timeout_start_usec = DEFAULT_TIMEOUT_USEC;
126 s->timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
127 s->restart_usec = DEFAULT_RESTART_USEC;
128 s->type = _SERVICE_TYPE_INVALID;
129
130 watch_init(&s->watchdog_watch);
131 watch_init(&s->timer_watch);
132
133 #ifdef HAVE_SYSV_COMPAT
134 s->sysv_start_priority = -1;
135 s->sysv_start_priority_from_rcnd = -1;
136 #endif
137 s->socket_fd = -1;
138 s->guess_main_pid = true;
139
140 exec_context_init(&s->exec_context);
141 kill_context_init(&s->kill_context);
142
143 RATELIMIT_INIT(s->start_limit, 10*USEC_PER_SEC, 5);
144
145 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
146 }
147
148 static void service_unwatch_control_pid(Service *s) {
149 assert(s);
150
151 if (s->control_pid <= 0)
152 return;
153
154 unit_unwatch_pid(UNIT(s), s->control_pid);
155 s->control_pid = 0;
156 }
157
158 static void service_unwatch_main_pid(Service *s) {
159 assert(s);
160
161 if (s->main_pid <= 0)
162 return;
163
164 unit_unwatch_pid(UNIT(s), s->main_pid);
165 s->main_pid = 0;
166 }
167
168 static void service_unwatch_pid_file(Service *s) {
169 if (!s->pid_file_pathspec)
170 return;
171
172 log_debug_unit(UNIT(s)->id, "Stopping watch for %s's PID file %s",
173 UNIT(s)->id, s->pid_file_pathspec->path);
174 path_spec_unwatch(s->pid_file_pathspec, UNIT(s));
175 path_spec_done(s->pid_file_pathspec);
176 free(s->pid_file_pathspec);
177 s->pid_file_pathspec = NULL;
178 }
179
180 static int service_set_main_pid(Service *s, pid_t pid) {
181 pid_t ppid;
182
183 assert(s);
184
185 if (pid <= 1)
186 return -EINVAL;
187
188 if (pid == getpid())
189 return -EINVAL;
190
191 s->main_pid = pid;
192 s->main_pid_known = true;
193
194 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
195 log_warning_unit(UNIT(s)->id,
196 "%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
197 UNIT(s)->id, (unsigned long) pid);
198
199 s->main_pid_alien = true;
200 } else
201 s->main_pid_alien = false;
202
203 exec_status_start(&s->main_exec_status, pid);
204
205 return 0;
206 }
207
208 static void service_close_socket_fd(Service *s) {
209 assert(s);
210
211 if (s->socket_fd < 0)
212 return;
213
214 close_nointr_nofail(s->socket_fd);
215 s->socket_fd = -1;
216 }
217
218 static void service_connection_unref(Service *s) {
219 assert(s);
220
221 if (!UNIT_DEREF(s->accept_socket))
222 return;
223
224 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
225 unit_ref_unset(&s->accept_socket);
226 }
227
228 static void service_stop_watchdog(Service *s) {
229 assert(s);
230
231 unit_unwatch_timer(UNIT(s), &s->watchdog_watch);
232 s->watchdog_timestamp.realtime = 0;
233 s->watchdog_timestamp.monotonic = 0;
234 }
235
236 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart);
237
238 static void service_handle_watchdog(Service *s) {
239 usec_t offset;
240 int r;
241
242 assert(s);
243
244 if (s->watchdog_usec == 0)
245 return;
246
247 offset = now(CLOCK_MONOTONIC) - s->watchdog_timestamp.monotonic;
248 if (offset >= s->watchdog_usec) {
249 log_error_unit(UNIT(s)->id, "%s watchdog timeout!", UNIT(s)->id);
250 service_enter_dead(s, SERVICE_FAILURE_WATCHDOG, true);
251 return;
252 }
253
254 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->watchdog_usec - offset, &s->watchdog_watch);
255 if (r < 0)
256 log_warning_unit(UNIT(s)->id,
257 "%s failed to install watchdog timer: %s",
258 UNIT(s)->id, strerror(-r));
259 }
260
261 static void service_reset_watchdog(Service *s) {
262 assert(s);
263
264 dual_timestamp_get(&s->watchdog_timestamp);
265 service_handle_watchdog(s);
266 }
267
268 static void service_done(Unit *u) {
269 Service *s = SERVICE(u);
270
271 assert(s);
272
273 free(s->pid_file);
274 s->pid_file = NULL;
275
276 #ifdef HAVE_SYSV_COMPAT
277 free(s->sysv_runlevels);
278 s->sysv_runlevels = NULL;
279 #endif
280
281 free(s->status_text);
282 s->status_text = NULL;
283
284 exec_context_done(&s->exec_context);
285 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
286 s->control_command = NULL;
287 s->main_command = NULL;
288
289 set_free(s->restart_ignore_status.code);
290 s->restart_ignore_status.code = NULL;
291 set_free(s->restart_ignore_status.signal);
292 s->restart_ignore_status.signal = NULL;
293
294 set_free(s->success_status.code);
295 s->success_status.code = NULL;
296 set_free(s->success_status.signal);
297 s->success_status.signal = NULL;
298
299 /* This will leak a process, but at least no memory or any of
300 * our resources */
301 service_unwatch_main_pid(s);
302 service_unwatch_control_pid(s);
303 service_unwatch_pid_file(s);
304
305 if (s->bus_name) {
306 unit_unwatch_bus_name(u, s->bus_name);
307 free(s->bus_name);
308 s->bus_name = NULL;
309 }
310
311 service_close_socket_fd(s);
312 service_connection_unref(s);
313
314 unit_ref_unset(&s->accept_socket);
315
316 service_stop_watchdog(s);
317
318 unit_unwatch_timer(u, &s->timer_watch);
319 }
320
321 #ifdef HAVE_SYSV_COMPAT
322 static char *sysv_translate_name(const char *name) {
323 char *r;
324
325 r = new(char, strlen(name) + sizeof(".service"));
326 if (!r)
327 return NULL;
328
329 if (endswith(name, ".sh"))
330 /* Drop .sh suffix */
331 strcpy(stpcpy(r, name) - 3, ".service");
332 if (startswith(name, "rc."))
333 /* Drop rc. prefix */
334 strcpy(stpcpy(r, name + 3), ".service");
335 else
336 /* Normal init script name */
337 strcpy(stpcpy(r, name), ".service");
338
339 return r;
340 }
341
342 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
343
344 /* We silently ignore the $ prefix here. According to the LSB
345 * spec it simply indicates whether something is a
346 * standardized name or a distribution-specific one. Since we
347 * just follow what already exists and do not introduce new
348 * uses or names we don't care who introduced a new name. */
349
350 static const char * const table[] = {
351 /* LSB defined facilities */
352 "local_fs", NULL,
353 "network", SPECIAL_NETWORK_TARGET,
354 "named", SPECIAL_NSS_LOOKUP_TARGET,
355 "portmap", SPECIAL_RPCBIND_TARGET,
356 "remote_fs", SPECIAL_REMOTE_FS_TARGET,
357 "syslog", NULL,
358 "time", SPECIAL_TIME_SYNC_TARGET,
359 };
360
361 unsigned i;
362 char *r;
363 const char *n;
364
365 assert(name);
366 assert(_r);
367
368 n = *name == '$' ? name + 1 : name;
369
370 for (i = 0; i < ELEMENTSOF(table); i += 2) {
371
372 if (!streq(table[i], n))
373 continue;
374
375 if (!table[i+1])
376 return 0;
377
378 r = strdup(table[i+1]);
379 if (!r)
380 return log_oom();
381
382 goto finish;
383 }
384
385 /* If we don't know this name, fallback heuristics to figure
386 * out whether something is a target or a service alias. */
387
388 if (*name == '$') {
389 if (!unit_prefix_is_valid(n))
390 return -EINVAL;
391
392 /* Facilities starting with $ are most likely targets */
393 r = unit_name_build(n, NULL, ".target");
394 } else if (filename && streq(name, filename))
395 /* Names equaling the file name of the services are redundant */
396 return 0;
397 else
398 /* Everything else we assume to be normal service names */
399 r = sysv_translate_name(n);
400
401 if (!r)
402 return -ENOMEM;
403
404 finish:
405 *_r = r;
406
407 return 1;
408 }
409
410 static int sysv_fix_order(Service *s) {
411 Unit *other;
412 int r;
413
414 assert(s);
415
416 if (s->sysv_start_priority < 0)
417 return 0;
418
419 /* For each pair of services where at least one lacks a LSB
420 * header, we use the start priority value to order things. */
421
422 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
423 Service *t;
424 UnitDependency d;
425 bool special_s, special_t;
426
427 t = SERVICE(other);
428
429 if (s == t)
430 continue;
431
432 if (UNIT(t)->load_state != UNIT_LOADED)
433 continue;
434
435 if (t->sysv_start_priority < 0)
436 continue;
437
438 /* If both units have modern headers we don't care
439 * about the priorities */
440 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
441 (UNIT(t)->fragment_path || t->sysv_has_lsb))
442 continue;
443
444 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
445 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
446
447 if (special_t && !special_s)
448 d = UNIT_AFTER;
449 else if (special_s && !special_t)
450 d = UNIT_BEFORE;
451 else if (t->sysv_start_priority < s->sysv_start_priority)
452 d = UNIT_AFTER;
453 else if (t->sysv_start_priority > s->sysv_start_priority)
454 d = UNIT_BEFORE;
455 else
456 continue;
457
458 /* FIXME: Maybe we should compare the name here lexicographically? */
459
460 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
461 return r;
462 }
463
464 return 0;
465 }
466
467 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
468 ExecCommand *c;
469
470 if (!(c = new0(ExecCommand, 1)))
471 return NULL;
472
473 if (!(c->path = strdup(path))) {
474 free(c);
475 return NULL;
476 }
477
478 if (!(c->argv = strv_new(path, arg1, NULL))) {
479 free(c->path);
480 free(c);
481 return NULL;
482 }
483
484 return c;
485 }
486
487 static int sysv_exec_commands(Service *s, const bool supports_reload) {
488 ExecCommand *c;
489
490 assert(s);
491 assert(s->is_sysv);
492 assert(UNIT(s)->source_path);
493
494 c = exec_command_new(UNIT(s)->source_path, "start");
495 if (!c)
496 return -ENOMEM;
497 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
498
499 c = exec_command_new(UNIT(s)->source_path, "stop");
500 if (!c)
501 return -ENOMEM;
502 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
503
504 if (supports_reload) {
505 c = exec_command_new(UNIT(s)->source_path, "reload");
506 if (!c)
507 return -ENOMEM;
508 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
509 }
510
511 return 0;
512 }
513
514 static bool usage_contains_reload(const char *line) {
515 return (strcasestr(line, "{reload|") ||
516 strcasestr(line, "{reload}") ||
517 strcasestr(line, "{reload\"") ||
518 strcasestr(line, "|reload|") ||
519 strcasestr(line, "|reload}") ||
520 strcasestr(line, "|reload\""));
521 }
522
523 static int service_load_sysv_path(Service *s, const char *path) {
524 FILE *f;
525 Unit *u;
526 unsigned line = 0;
527 int r;
528 enum {
529 NORMAL,
530 DESCRIPTION,
531 LSB,
532 LSB_DESCRIPTION,
533 USAGE_CONTINUATION
534 } state = NORMAL;
535 char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
536 struct stat st;
537 bool supports_reload = false;
538
539 assert(s);
540 assert(path);
541
542 u = UNIT(s);
543
544 f = fopen(path, "re");
545 if (!f) {
546 r = errno == ENOENT ? 0 : -errno;
547 goto finish;
548 }
549
550 if (fstat(fileno(f), &st) < 0) {
551 r = -errno;
552 goto finish;
553 }
554
555 free(u->source_path);
556 u->source_path = strdup(path);
557 if (!u->source_path) {
558 r = -ENOMEM;
559 goto finish;
560 }
561 u->source_mtime = timespec_load(&st.st_mtim);
562
563 if (null_or_empty(&st)) {
564 u->load_state = UNIT_MASKED;
565 r = 0;
566 goto finish;
567 }
568
569 s->is_sysv = true;
570
571 while (!feof(f)) {
572 char l[LINE_MAX], *t;
573
574 if (!fgets(l, sizeof(l), f)) {
575 if (feof(f))
576 break;
577
578 r = -errno;
579 log_error_unit(u->id,
580 "Failed to read configuration file '%s': %s",
581 path, strerror(-r));
582 goto finish;
583 }
584
585 line++;
586
587 t = strstrip(l);
588 if (*t != '#') {
589 /* Try to figure out whether this init script supports
590 * the reload operation. This heuristic looks for
591 * "Usage" lines which include the reload option. */
592 if ( state == USAGE_CONTINUATION ||
593 (state == NORMAL && strcasestr(t, "usage"))) {
594 if (usage_contains_reload(t)) {
595 supports_reload = true;
596 state = NORMAL;
597 } else if (t[strlen(t)-1] == '\\')
598 state = USAGE_CONTINUATION;
599 else
600 state = NORMAL;
601 }
602
603 continue;
604 }
605
606 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
607 state = LSB;
608 s->sysv_has_lsb = true;
609 continue;
610 }
611
612 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
613 state = NORMAL;
614 continue;
615 }
616
617 t++;
618 t += strspn(t, WHITESPACE);
619
620 if (state == NORMAL) {
621
622 /* Try to parse Red Hat style chkconfig headers */
623
624 if (startswith_no_case(t, "chkconfig:")) {
625 int start_priority;
626 char runlevels[16], *k;
627
628 state = NORMAL;
629
630 if (sscanf(t+10, "%15s %i %*i",
631 runlevels,
632 &start_priority) != 2) {
633
634 log_warning_unit(u->id,
635 "[%s:%u] Failed to parse chkconfig line. Ignoring.",
636 path, line);
637 continue;
638 }
639
640 /* A start priority gathered from the
641 * symlink farms is preferred over the
642 * data from the LSB header. */
643 if (start_priority < 0 || start_priority > 99)
644 log_warning_unit(u->id,
645 "[%s:%u] Start priority out of range. Ignoring.",
646 path, line);
647 else
648 s->sysv_start_priority = start_priority;
649
650 char_array_0(runlevels);
651 k = delete_chars(runlevels, WHITESPACE "-");
652
653 if (k[0]) {
654 char *d;
655
656 if (!(d = strdup(k))) {
657 r = -ENOMEM;
658 goto finish;
659 }
660
661 free(s->sysv_runlevels);
662 s->sysv_runlevels = d;
663 }
664
665 } else if (startswith_no_case(t, "description:")) {
666
667 size_t k = strlen(t);
668 char *d;
669 const char *j;
670
671 if (t[k-1] == '\\') {
672 state = DESCRIPTION;
673 t[k-1] = 0;
674 }
675
676 if ((j = strstrip(t+12)) && *j) {
677 if (!(d = strdup(j))) {
678 r = -ENOMEM;
679 goto finish;
680 }
681 } else
682 d = NULL;
683
684 free(chkconfig_description);
685 chkconfig_description = d;
686
687 } else if (startswith_no_case(t, "pidfile:")) {
688
689 char *fn;
690
691 state = NORMAL;
692
693 fn = strstrip(t+8);
694 if (!path_is_absolute(fn)) {
695 log_warning_unit(u->id,
696 "[%s:%u] PID file not absolute. Ignoring.",
697 path, line);
698 continue;
699 }
700
701 if (!(fn = strdup(fn))) {
702 r = -ENOMEM;
703 goto finish;
704 }
705
706 free(s->pid_file);
707 s->pid_file = fn;
708 }
709
710 } else if (state == DESCRIPTION) {
711
712 /* Try to parse Red Hat style description
713 * continuation */
714
715 size_t k = strlen(t);
716 char *j;
717
718 if (t[k-1] == '\\')
719 t[k-1] = 0;
720 else
721 state = NORMAL;
722
723 if ((j = strstrip(t)) && *j) {
724 char *d = NULL;
725
726 if (chkconfig_description)
727 d = strjoin(chkconfig_description, " ", j, NULL);
728 else
729 d = strdup(j);
730
731 if (!d) {
732 r = -ENOMEM;
733 goto finish;
734 }
735
736 free(chkconfig_description);
737 chkconfig_description = d;
738 }
739
740 } else if (state == LSB || state == LSB_DESCRIPTION) {
741
742 if (startswith_no_case(t, "Provides:")) {
743 char *i, *w;
744 size_t z;
745
746 state = LSB;
747
748 FOREACH_WORD_QUOTED(w, z, t+9, i) {
749 char *n, *m;
750
751 if (!(n = strndup(w, z))) {
752 r = -ENOMEM;
753 goto finish;
754 }
755
756 r = sysv_translate_facility(n, path_get_file_name(path), &m);
757 free(n);
758
759 if (r < 0)
760 goto finish;
761
762 if (r == 0)
763 continue;
764
765 if (unit_name_to_type(m) == UNIT_SERVICE)
766 r = unit_add_name(u, m);
767 else
768 /* NB: SysV targets
769 * which are provided
770 * by a service are
771 * pulled in by the
772 * services, as an
773 * indication that the
774 * generic service is
775 * now available. This
776 * is strictly
777 * one-way. The
778 * targets do NOT pull
779 * in the SysV
780 * services! */
781 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
782
783 if (r < 0)
784 log_error_unit(u->id,
785 "[%s:%u] Failed to add LSB Provides name %s, ignoring: %s",
786 path, line, m, strerror(-r));
787
788 free(m);
789 }
790
791 } else if (startswith_no_case(t, "Required-Start:") ||
792 startswith_no_case(t, "Should-Start:") ||
793 startswith_no_case(t, "X-Start-Before:") ||
794 startswith_no_case(t, "X-Start-After:")) {
795 char *i, *w;
796 size_t z;
797
798 state = LSB;
799
800 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
801 char *n, *m;
802
803 if (!(n = strndup(w, z))) {
804 r = -ENOMEM;
805 goto finish;
806 }
807
808 r = sysv_translate_facility(n, path_get_file_name(path), &m);
809 if (r < 0) {
810 log_error_unit(u->id,
811 "[%s:%u] Failed to translate LSB dependency %s, ignoring: %s",
812 path, line, n, strerror(-r));
813 free(n);
814 continue;
815 }
816
817 free(n);
818
819 if (r == 0)
820 continue;
821
822 r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
823
824 if (r < 0)
825 log_error_unit(u->id, "[%s:%u] Failed to add dependency on %s, ignoring: %s",
826 path, line, m, strerror(-r));
827
828 free(m);
829 }
830 } else if (startswith_no_case(t, "Default-Start:")) {
831 char *k, *d;
832
833 state = LSB;
834
835 k = delete_chars(t+14, WHITESPACE "-");
836
837 if (k[0] != 0) {
838 if (!(d = strdup(k))) {
839 r = -ENOMEM;
840 goto finish;
841 }
842
843 free(s->sysv_runlevels);
844 s->sysv_runlevels = d;
845 }
846
847 } else if (startswith_no_case(t, "Description:")) {
848 char *d, *j;
849
850 state = LSB_DESCRIPTION;
851
852 if ((j = strstrip(t+12)) && *j) {
853 if (!(d = strdup(j))) {
854 r = -ENOMEM;
855 goto finish;
856 }
857 } else
858 d = NULL;
859
860 free(long_description);
861 long_description = d;
862
863 } else if (startswith_no_case(t, "Short-Description:")) {
864 char *d, *j;
865
866 state = LSB;
867
868 if ((j = strstrip(t+18)) && *j) {
869 if (!(d = strdup(j))) {
870 r = -ENOMEM;
871 goto finish;
872 }
873 } else
874 d = NULL;
875
876 free(short_description);
877 short_description = d;
878
879 } else if (state == LSB_DESCRIPTION) {
880
881 if (startswith(l, "#\t") || startswith(l, "# ")) {
882 char *j;
883
884 if ((j = strstrip(t)) && *j) {
885 char *d = NULL;
886
887 if (long_description)
888 d = strjoin(long_description, " ", t, NULL);
889 else
890 d = strdup(j);
891
892 if (!d) {
893 r = -ENOMEM;
894 goto finish;
895 }
896
897 free(long_description);
898 long_description = d;
899 }
900
901 } else
902 state = LSB;
903 }
904 }
905 }
906
907 if ((r = sysv_exec_commands(s, supports_reload)) < 0)
908 goto finish;
909
910 if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
911 /* If there a runlevels configured for this service
912 * but none of the standard ones, then we assume this
913 * is some special kind of service (which might be
914 * needed for early boot) and don't create any links
915 * to it. */
916
917 UNIT(s)->default_dependencies = false;
918
919 /* Don't timeout special services during boot (like fsck) */
920 s->timeout_start_usec = 0;
921 s->timeout_stop_usec = 0;
922 } else {
923 s->timeout_start_usec = DEFAULT_SYSV_TIMEOUT_USEC;
924 s->timeout_stop_usec = DEFAULT_SYSV_TIMEOUT_USEC;
925 }
926
927 /* Special setting for all SysV services */
928 s->type = SERVICE_FORKING;
929 s->remain_after_exit = !s->pid_file;
930 s->guess_main_pid = false;
931 s->restart = SERVICE_RESTART_NO;
932 s->exec_context.ignore_sigpipe = false;
933 s->kill_context.kill_mode = KILL_PROCESS;
934
935 /* We use the long description only if
936 * no short description is set. */
937
938 if (short_description)
939 description = short_description;
940 else if (chkconfig_description)
941 description = chkconfig_description;
942 else if (long_description)
943 description = long_description;
944 else
945 description = NULL;
946
947 if (description) {
948 char *d;
949
950 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
951 r = -ENOMEM;
952 goto finish;
953 }
954
955 u->description = d;
956 }
957
958 /* The priority that has been set in /etc/rcN.d/ hierarchies
959 * takes precedence over what is stored as default in the LSB
960 * header */
961 if (s->sysv_start_priority_from_rcnd >= 0)
962 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
963
964 u->load_state = UNIT_LOADED;
965 r = 0;
966
967 finish:
968
969 if (f)
970 fclose(f);
971
972 free(short_description);
973 free(long_description);
974 free(chkconfig_description);
975
976 return r;
977 }
978
979 static int service_load_sysv_name(Service *s, const char *name) {
980 char **p;
981
982 assert(s);
983 assert(name);
984
985 /* For SysV services we strip the rc.* and *.sh
986 * prefixes/suffixes. */
987 if (startswith(name, "rc.") ||
988 endswith(name, ".sh.service"))
989 return -ENOENT;
990
991 STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
992 char *path;
993 int r;
994
995 path = strjoin(*p, "/", name, NULL);
996 if (!path)
997 return -ENOMEM;
998
999 assert(endswith(path, ".service"));
1000 path[strlen(path)-8] = 0;
1001
1002 r = service_load_sysv_path(s, path);
1003
1004 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1005 /* Try *.sh source'able init scripts */
1006 strcat(path, ".sh");
1007 r = service_load_sysv_path(s, path);
1008 }
1009 free(path);
1010
1011 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1012 /* Try rc.* init scripts */
1013
1014 path = strjoin(*p, "/rc.", name, NULL);
1015 if (!path)
1016 return -ENOMEM;
1017
1018 /* Drop .service suffix */
1019 path[strlen(path)-8] = 0;
1020 r = service_load_sysv_path(s, path);
1021 free(path);
1022 }
1023
1024 if (r < 0)
1025 return r;
1026
1027 if (UNIT(s)->load_state != UNIT_STUB)
1028 break;
1029 }
1030
1031 return 0;
1032 }
1033
1034 static int service_load_sysv(Service *s) {
1035 const char *t;
1036 Iterator i;
1037 int r;
1038
1039 assert(s);
1040
1041 /* Load service data from SysV init scripts, preferably with
1042 * LSB headers ... */
1043
1044 if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1045 return 0;
1046
1047 if ((t = UNIT(s)->id))
1048 if ((r = service_load_sysv_name(s, t)) < 0)
1049 return r;
1050
1051 if (UNIT(s)->load_state == UNIT_STUB)
1052 SET_FOREACH(t, UNIT(s)->names, i) {
1053 if (t == UNIT(s)->id)
1054 continue;
1055
1056 if ((r = service_load_sysv_name(s, t)) < 0)
1057 return r;
1058
1059 if (UNIT(s)->load_state != UNIT_STUB)
1060 break;
1061 }
1062
1063 return 0;
1064 }
1065 #endif
1066
1067 static int fsck_fix_order(Service *s) {
1068 Unit *other;
1069 int r;
1070
1071 assert(s);
1072
1073 if (s->fsck_passno <= 0)
1074 return 0;
1075
1076 /* For each pair of services where both have an fsck priority
1077 * we order things based on it. */
1078
1079 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
1080 Service *t;
1081 UnitDependency d;
1082
1083 t = SERVICE(other);
1084
1085 if (s == t)
1086 continue;
1087
1088 if (UNIT(t)->load_state != UNIT_LOADED)
1089 continue;
1090
1091 if (t->fsck_passno <= 0)
1092 continue;
1093
1094 if (t->fsck_passno < s->fsck_passno)
1095 d = UNIT_AFTER;
1096 else if (t->fsck_passno > s->fsck_passno)
1097 d = UNIT_BEFORE;
1098 else
1099 continue;
1100
1101 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1102 return r;
1103 }
1104
1105 return 0;
1106 }
1107
1108 static int service_verify(Service *s) {
1109 assert(s);
1110
1111 if (UNIT(s)->load_state != UNIT_LOADED)
1112 return 0;
1113
1114 if (!s->exec_command[SERVICE_EXEC_START]) {
1115 log_error_unit(UNIT(s)->id,
1116 "%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1117 return -EINVAL;
1118 }
1119
1120 if (s->type != SERVICE_ONESHOT &&
1121 s->exec_command[SERVICE_EXEC_START]->command_next) {
1122 log_error_unit(UNIT(s)->id,
1123 "%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1124 return -EINVAL;
1125 }
1126
1127 if (s->type == SERVICE_DBUS && !s->bus_name) {
1128 log_error_unit(UNIT(s)->id,
1129 "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1130 return -EINVAL;
1131 }
1132
1133 if (s->bus_name && s->type != SERVICE_DBUS)
1134 log_warning_unit(UNIT(s)->id,
1135 "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
1136
1137 if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
1138 log_error_unit(UNIT(s)->id,
1139 "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
1140 return -EINVAL;
1141 }
1142
1143 return 0;
1144 }
1145
1146 static int service_add_default_dependencies(Service *s) {
1147 int r;
1148
1149 assert(s);
1150
1151 /* Add a number of automatic dependencies useful for the
1152 * majority of services. */
1153
1154 /* First, pull in base system */
1155 if (UNIT(s)->manager->running_as == SYSTEMD_SYSTEM) {
1156
1157 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1158 return r;
1159
1160 } else if (UNIT(s)->manager->running_as == SYSTEMD_USER) {
1161
1162 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1163 return r;
1164 }
1165
1166 /* Second, activate normal shutdown */
1167 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1168 }
1169
1170 static void service_fix_output(Service *s) {
1171 assert(s);
1172
1173 /* If nothing has been explicitly configured, patch default
1174 * output in. If input is socket/tty we avoid this however,
1175 * since in that case we want output to default to the same
1176 * place as we read input from. */
1177
1178 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1179 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1180 s->exec_context.std_input == EXEC_INPUT_NULL)
1181 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1182
1183 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1184 s->exec_context.std_input == EXEC_INPUT_NULL)
1185 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1186 }
1187
1188 static int service_load(Unit *u) {
1189 int r;
1190 Service *s = SERVICE(u);
1191
1192 assert(s);
1193
1194 /* Load a .service file */
1195 if ((r = unit_load_fragment(u)) < 0)
1196 return r;
1197
1198 #ifdef HAVE_SYSV_COMPAT
1199 /* Load a classic init script as a fallback, if we couldn't find anything */
1200 if (u->load_state == UNIT_STUB)
1201 if ((r = service_load_sysv(s)) < 0)
1202 return r;
1203 #endif
1204
1205 /* Still nothing found? Then let's give up */
1206 if (u->load_state == UNIT_STUB)
1207 return -ENOENT;
1208
1209 /* We were able to load something, then let's add in the
1210 * dropin directories. */
1211 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1212 return r;
1213
1214 /* This is a new unit? Then let's add in some extras */
1215 if (u->load_state == UNIT_LOADED) {
1216 if (s->type == _SERVICE_TYPE_INVALID)
1217 s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
1218
1219 /* Oneshot services have disabled start timeout by default */
1220 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
1221 s->timeout_start_usec = 0;
1222
1223 service_fix_output(s);
1224
1225 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1226 return r;
1227
1228 if ((r = unit_add_default_cgroups(u)) < 0)
1229 return r;
1230
1231 #ifdef HAVE_SYSV_COMPAT
1232 if ((r = sysv_fix_order(s)) < 0)
1233 return r;
1234 #endif
1235
1236 if ((r = fsck_fix_order(s)) < 0)
1237 return r;
1238
1239 if (s->bus_name)
1240 if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1241 return r;
1242
1243 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1244 s->notify_access = NOTIFY_MAIN;
1245
1246 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1247 s->notify_access = NOTIFY_MAIN;
1248
1249 if (s->type == SERVICE_DBUS || s->bus_name)
1250 if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true)) < 0)
1251 return r;
1252
1253 if (UNIT(s)->default_dependencies)
1254 if ((r = service_add_default_dependencies(s)) < 0)
1255 return r;
1256
1257 r = unit_exec_context_defaults(u, &s->exec_context);
1258 if (r < 0)
1259 return r;
1260 }
1261
1262 return service_verify(s);
1263 }
1264
1265 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1266
1267 ServiceExecCommand c;
1268 Service *s = SERVICE(u);
1269 const char *prefix2;
1270 char *p2;
1271
1272 assert(s);
1273
1274 p2 = strappend(prefix, "\t");
1275 prefix2 = p2 ? p2 : prefix;
1276
1277 fprintf(f,
1278 "%sService State: %s\n"
1279 "%sResult: %s\n"
1280 "%sReload Result: %s\n"
1281 "%sPermissionsStartOnly: %s\n"
1282 "%sRootDirectoryStartOnly: %s\n"
1283 "%sRemainAfterExit: %s\n"
1284 "%sGuessMainPID: %s\n"
1285 "%sType: %s\n"
1286 "%sRestart: %s\n"
1287 "%sNotifyAccess: %s\n",
1288 prefix, service_state_to_string(s->state),
1289 prefix, service_result_to_string(s->result),
1290 prefix, service_result_to_string(s->reload_result),
1291 prefix, yes_no(s->permissions_start_only),
1292 prefix, yes_no(s->root_directory_start_only),
1293 prefix, yes_no(s->remain_after_exit),
1294 prefix, yes_no(s->guess_main_pid),
1295 prefix, service_type_to_string(s->type),
1296 prefix, service_restart_to_string(s->restart),
1297 prefix, notify_access_to_string(s->notify_access));
1298
1299 if (s->control_pid > 0)
1300 fprintf(f,
1301 "%sControl PID: %lu\n",
1302 prefix, (unsigned long) s->control_pid);
1303
1304 if (s->main_pid > 0)
1305 fprintf(f,
1306 "%sMain PID: %lu\n"
1307 "%sMain PID Known: %s\n"
1308 "%sMain PID Alien: %s\n",
1309 prefix, (unsigned long) s->main_pid,
1310 prefix, yes_no(s->main_pid_known),
1311 prefix, yes_no(s->main_pid_alien));
1312
1313 if (s->pid_file)
1314 fprintf(f,
1315 "%sPIDFile: %s\n",
1316 prefix, s->pid_file);
1317
1318 if (s->bus_name)
1319 fprintf(f,
1320 "%sBusName: %s\n"
1321 "%sBus Name Good: %s\n",
1322 prefix, s->bus_name,
1323 prefix, yes_no(s->bus_name_good));
1324
1325 kill_context_dump(&s->kill_context, f, prefix);
1326 exec_context_dump(&s->exec_context, f, prefix);
1327
1328 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1329
1330 if (!s->exec_command[c])
1331 continue;
1332
1333 fprintf(f, "%s-> %s:\n",
1334 prefix, service_exec_command_to_string(c));
1335
1336 exec_command_dump_list(s->exec_command[c], f, prefix2);
1337 }
1338
1339 #ifdef HAVE_SYSV_COMPAT
1340 if (s->is_sysv)
1341 fprintf(f,
1342 "%sSysV Init Script has LSB Header: %s\n"
1343 "%sSysVEnabled: %s\n",
1344 prefix, yes_no(s->sysv_has_lsb),
1345 prefix, yes_no(s->sysv_enabled));
1346
1347 if (s->sysv_start_priority >= 0)
1348 fprintf(f,
1349 "%sSysVStartPriority: %i\n",
1350 prefix, s->sysv_start_priority);
1351
1352 if (s->sysv_runlevels)
1353 fprintf(f, "%sSysVRunLevels: %s\n",
1354 prefix, s->sysv_runlevels);
1355 #endif
1356
1357 if (s->fsck_passno > 0)
1358 fprintf(f,
1359 "%sFsckPassNo: %i\n",
1360 prefix, s->fsck_passno);
1361
1362 if (s->status_text)
1363 fprintf(f, "%sStatus Text: %s\n",
1364 prefix, s->status_text);
1365
1366 free(p2);
1367 }
1368
1369 static int service_load_pid_file(Service *s, bool may_warn) {
1370 char *k;
1371 int r;
1372 pid_t pid;
1373
1374 assert(s);
1375
1376 if (!s->pid_file)
1377 return -ENOENT;
1378
1379 if ((r = read_one_line_file(s->pid_file, &k)) < 0) {
1380 if (may_warn)
1381 log_info_unit(UNIT(s)->id,
1382 "PID file %s not readable (yet?) after %s.",
1383 s->pid_file, service_state_to_string(s->state));
1384 return r;
1385 }
1386
1387 r = parse_pid(k, &pid);
1388 free(k);
1389
1390 if (r < 0)
1391 return r;
1392
1393 if (kill(pid, 0) < 0 && errno != EPERM) {
1394 if (may_warn)
1395 log_info_unit(UNIT(s)->id,
1396 "PID %lu read from file %s does not exist.",
1397 (unsigned long) pid, s->pid_file);
1398 return -ESRCH;
1399 }
1400
1401 if (s->main_pid_known) {
1402 if (pid == s->main_pid)
1403 return 0;
1404
1405 log_debug_unit(UNIT(s)->id,
1406 "Main PID changing: %lu -> %lu",
1407 (unsigned long) s->main_pid, (unsigned long) pid);
1408 service_unwatch_main_pid(s);
1409 s->main_pid_known = false;
1410 } else
1411 log_debug_unit(UNIT(s)->id,
1412 "Main PID loaded: %lu", (unsigned long) pid);
1413
1414 if ((r = service_set_main_pid(s, pid)) < 0)
1415 return r;
1416
1417 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1418 /* FIXME: we need to do something here */
1419 return r;
1420
1421 return 0;
1422 }
1423
1424 static int service_search_main_pid(Service *s) {
1425 pid_t pid;
1426 int r;
1427
1428 assert(s);
1429
1430 /* If we know it anyway, don't ever fallback to unreliable
1431 * heuristics */
1432 if (s->main_pid_known)
1433 return 0;
1434
1435 if (!s->guess_main_pid)
1436 return 0;
1437
1438 assert(s->main_pid <= 0);
1439
1440 if ((pid = cgroup_bonding_search_main_pid_list(UNIT(s)->cgroup_bondings)) <= 0)
1441 return -ENOENT;
1442
1443 log_debug_unit(UNIT(s)->id,
1444 "Main PID guessed: %lu", (unsigned long) pid);
1445 if ((r = service_set_main_pid(s, pid)) < 0)
1446 return r;
1447
1448 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1449 /* FIXME: we need to do something here */
1450 return r;
1451
1452 return 0;
1453 }
1454
1455 static void service_notify_sockets_dead(Service *s, bool failed_permanent) {
1456 Iterator i;
1457 Unit *u;
1458
1459 assert(s);
1460
1461 /* Notifies all our sockets when we die */
1462
1463 if (s->socket_fd >= 0)
1464 return;
1465
1466 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i)
1467 if (u->type == UNIT_SOCKET)
1468 socket_notify_service_dead(SOCKET(u), failed_permanent);
1469
1470 return;
1471 }
1472
1473 static void service_set_state(Service *s, ServiceState state) {
1474 ServiceState old_state;
1475 const UnitActiveState *table;
1476 assert(s);
1477
1478 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1479
1480 old_state = s->state;
1481 s->state = state;
1482
1483 service_unwatch_pid_file(s);
1484
1485 if (state != SERVICE_START_PRE &&
1486 state != SERVICE_START &&
1487 state != SERVICE_START_POST &&
1488 state != SERVICE_RELOAD &&
1489 state != SERVICE_STOP &&
1490 state != SERVICE_STOP_SIGTERM &&
1491 state != SERVICE_STOP_SIGKILL &&
1492 state != SERVICE_STOP_POST &&
1493 state != SERVICE_FINAL_SIGTERM &&
1494 state != SERVICE_FINAL_SIGKILL &&
1495 state != SERVICE_AUTO_RESTART)
1496 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1497
1498 if (state != SERVICE_START &&
1499 state != SERVICE_START_POST &&
1500 state != SERVICE_RUNNING &&
1501 state != SERVICE_RELOAD &&
1502 state != SERVICE_STOP &&
1503 state != SERVICE_STOP_SIGTERM &&
1504 state != SERVICE_STOP_SIGKILL) {
1505 service_unwatch_main_pid(s);
1506 s->main_command = NULL;
1507 }
1508
1509 if (state != SERVICE_START_PRE &&
1510 state != SERVICE_START &&
1511 state != SERVICE_START_POST &&
1512 state != SERVICE_RELOAD &&
1513 state != SERVICE_STOP &&
1514 state != SERVICE_STOP_SIGTERM &&
1515 state != SERVICE_STOP_SIGKILL &&
1516 state != SERVICE_STOP_POST &&
1517 state != SERVICE_FINAL_SIGTERM &&
1518 state != SERVICE_FINAL_SIGKILL) {
1519 service_unwatch_control_pid(s);
1520 s->control_command = NULL;
1521 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1522 }
1523
1524 if (state == SERVICE_FAILED)
1525 service_notify_sockets_dead(s, s->result == SERVICE_FAILURE_START_LIMIT);
1526
1527 if (state == SERVICE_DEAD ||
1528 state == SERVICE_STOP ||
1529 state == SERVICE_STOP_SIGTERM ||
1530 state == SERVICE_STOP_SIGKILL ||
1531 state == SERVICE_STOP_POST ||
1532 state == SERVICE_FINAL_SIGTERM ||
1533 state == SERVICE_FINAL_SIGKILL ||
1534 state == SERVICE_AUTO_RESTART)
1535 service_notify_sockets_dead(s, false);
1536
1537 if (state != SERVICE_START_PRE &&
1538 state != SERVICE_START &&
1539 state != SERVICE_START_POST &&
1540 state != SERVICE_RUNNING &&
1541 state != SERVICE_RELOAD &&
1542 state != SERVICE_STOP &&
1543 state != SERVICE_STOP_SIGTERM &&
1544 state != SERVICE_STOP_SIGKILL &&
1545 state != SERVICE_STOP_POST &&
1546 state != SERVICE_FINAL_SIGTERM &&
1547 state != SERVICE_FINAL_SIGKILL &&
1548 !(state == SERVICE_DEAD && UNIT(s)->job)) {
1549 service_close_socket_fd(s);
1550 service_connection_unref(s);
1551 }
1552
1553 if (state == SERVICE_STOP || state == SERVICE_STOP_SIGTERM)
1554 service_stop_watchdog(s);
1555
1556 /* For the inactive states unit_notify() will trim the cgroup,
1557 * but for exit we have to do that ourselves... */
1558 if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1559 cgroup_bonding_trim_list(UNIT(s)->cgroup_bondings, true);
1560
1561 if (old_state != state)
1562 log_debug_unit(UNIT(s)->id,
1563 "%s changed %s -> %s", UNIT(s)->id,
1564 service_state_to_string(old_state),
1565 service_state_to_string(state));
1566
1567 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1568 s->reload_result = SERVICE_SUCCESS;
1569 }
1570
1571 static int service_coldplug(Unit *u) {
1572 Service *s = SERVICE(u);
1573 int r;
1574
1575 assert(s);
1576 assert(s->state == SERVICE_DEAD);
1577
1578 if (s->deserialized_state != s->state) {
1579
1580 if (s->deserialized_state == SERVICE_START_PRE ||
1581 s->deserialized_state == SERVICE_START ||
1582 s->deserialized_state == SERVICE_START_POST ||
1583 s->deserialized_state == SERVICE_RELOAD ||
1584 s->deserialized_state == SERVICE_STOP ||
1585 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1586 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1587 s->deserialized_state == SERVICE_STOP_POST ||
1588 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1589 s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1590 s->deserialized_state == SERVICE_AUTO_RESTART) {
1591 if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_start_usec > 0) {
1592 usec_t k;
1593
1594 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_start_usec;
1595
1596 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, k, &s->timer_watch);
1597 if (r < 0)
1598 return r;
1599 }
1600 }
1601
1602 if ((s->deserialized_state == SERVICE_START &&
1603 (s->type == SERVICE_FORKING ||
1604 s->type == SERVICE_DBUS ||
1605 s->type == SERVICE_ONESHOT ||
1606 s->type == SERVICE_NOTIFY)) ||
1607 s->deserialized_state == SERVICE_START_POST ||
1608 s->deserialized_state == SERVICE_RUNNING ||
1609 s->deserialized_state == SERVICE_RELOAD ||
1610 s->deserialized_state == SERVICE_STOP ||
1611 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1612 s->deserialized_state == SERVICE_STOP_SIGKILL)
1613 if (s->main_pid > 0)
1614 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1615 return r;
1616
1617 if (s->deserialized_state == SERVICE_START_PRE ||
1618 s->deserialized_state == SERVICE_START ||
1619 s->deserialized_state == SERVICE_START_POST ||
1620 s->deserialized_state == SERVICE_RELOAD ||
1621 s->deserialized_state == SERVICE_STOP ||
1622 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1623 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1624 s->deserialized_state == SERVICE_STOP_POST ||
1625 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1626 s->deserialized_state == SERVICE_FINAL_SIGKILL)
1627 if (s->control_pid > 0)
1628 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1629 return r;
1630
1631 if (s->deserialized_state == SERVICE_START_POST ||
1632 s->deserialized_state == SERVICE_RUNNING)
1633 service_handle_watchdog(s);
1634
1635 service_set_state(s, s->deserialized_state);
1636 }
1637 return 0;
1638 }
1639
1640 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1641 Iterator i;
1642 int r;
1643 int *rfds = NULL;
1644 unsigned rn_fds = 0;
1645 Unit *u;
1646
1647 assert(s);
1648 assert(fds);
1649 assert(n_fds);
1650
1651 if (s->socket_fd >= 0)
1652 return 0;
1653
1654 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1655 int *cfds;
1656 unsigned cn_fds;
1657 Socket *sock;
1658
1659 if (u->type != UNIT_SOCKET)
1660 continue;
1661
1662 sock = SOCKET(u);
1663
1664 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1665 goto fail;
1666
1667 if (!cfds)
1668 continue;
1669
1670 if (!rfds) {
1671 rfds = cfds;
1672 rn_fds = cn_fds;
1673 } else {
1674 int *t;
1675
1676 if (!(t = new(int, rn_fds+cn_fds))) {
1677 free(cfds);
1678 r = -ENOMEM;
1679 goto fail;
1680 }
1681
1682 memcpy(t, rfds, rn_fds * sizeof(int));
1683 memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1684 free(rfds);
1685 free(cfds);
1686
1687 rfds = t;
1688 rn_fds = rn_fds+cn_fds;
1689 }
1690 }
1691
1692 *fds = rfds;
1693 *n_fds = rn_fds;
1694
1695 return 0;
1696
1697 fail:
1698 free(rfds);
1699
1700 return r;
1701 }
1702
1703 static int service_spawn(
1704 Service *s,
1705 ExecCommand *c,
1706 bool timeout,
1707 bool pass_fds,
1708 bool apply_permissions,
1709 bool apply_chroot,
1710 bool apply_tty_stdin,
1711 bool set_notify_socket,
1712 bool is_control,
1713 pid_t *_pid) {
1714
1715 pid_t pid;
1716 int r;
1717 int *fds = NULL, *fdsbuf = NULL;
1718 unsigned n_fds = 0, n_env = 0;
1719 char **argv = NULL, **final_env = NULL, **our_env = NULL;
1720
1721 assert(s);
1722 assert(c);
1723 assert(_pid);
1724
1725 if (pass_fds ||
1726 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1727 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1728 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1729
1730 if (s->socket_fd >= 0) {
1731 fds = &s->socket_fd;
1732 n_fds = 1;
1733 } else {
1734 if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1735 goto fail;
1736
1737 fds = fdsbuf;
1738 }
1739 }
1740
1741 if (timeout && s->timeout_start_usec) {
1742 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_start_usec, &s->timer_watch);
1743 if (r < 0)
1744 goto fail;
1745 } else
1746 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1747
1748 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1749 r = -ENOMEM;
1750 goto fail;
1751 }
1752
1753 our_env = new0(char*, 5);
1754 if (!our_env) {
1755 r = -ENOMEM;
1756 goto fail;
1757 }
1758
1759 if (set_notify_socket)
1760 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1761 r = -ENOMEM;
1762 goto fail;
1763 }
1764
1765 if (s->main_pid > 0)
1766 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1767 r = -ENOMEM;
1768 goto fail;
1769 }
1770
1771 if (s->watchdog_usec > 0)
1772 if (asprintf(our_env + n_env++, "WATCHDOG_USEC=%llu", (unsigned long long) s->watchdog_usec) < 0) {
1773 r = -ENOMEM;
1774 goto fail;
1775 }
1776
1777 if (s->meta.manager->running_as != SYSTEMD_SYSTEM)
1778 if (asprintf(our_env + n_env++, "MANAGERPID=%lu", (unsigned long) getpid()) < 0) {
1779 r = -ENOMEM;
1780 goto fail;
1781 }
1782
1783 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1784 if (!final_env) {
1785 r = -ENOMEM;
1786 goto fail;
1787 }
1788
1789 r = exec_spawn(c,
1790 argv,
1791 &s->exec_context,
1792 fds, n_fds,
1793 final_env,
1794 apply_permissions,
1795 apply_chroot,
1796 apply_tty_stdin,
1797 UNIT(s)->manager->confirm_spawn,
1798 UNIT(s)->cgroup_bondings,
1799 UNIT(s)->cgroup_attributes,
1800 is_control ? "control" : NULL,
1801 UNIT(s)->id,
1802 s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
1803 &pid);
1804
1805 if (r < 0)
1806 goto fail;
1807
1808 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1809 /* FIXME: we need to do something here */
1810 goto fail;
1811
1812 free(fdsbuf);
1813 strv_free(argv);
1814 strv_free(our_env);
1815 strv_free(final_env);
1816
1817 *_pid = pid;
1818
1819 return 0;
1820
1821 fail:
1822 free(fdsbuf);
1823 strv_free(argv);
1824 strv_free(our_env);
1825 strv_free(final_env);
1826
1827 if (timeout)
1828 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1829
1830 return r;
1831 }
1832
1833 static int main_pid_good(Service *s) {
1834 assert(s);
1835
1836 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1837 * don't know */
1838
1839 /* If we know the pid file, then lets just check if it is
1840 * still valid */
1841 if (s->main_pid_known) {
1842
1843 /* If it's an alien child let's check if it is still
1844 * alive ... */
1845 if (s->main_pid_alien)
1846 return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1847
1848 /* .. otherwise assume we'll get a SIGCHLD for it,
1849 * which we really should wait for to collect exit
1850 * status and code */
1851 return s->main_pid > 0;
1852 }
1853
1854 /* We don't know the pid */
1855 return -EAGAIN;
1856 }
1857
1858 static int control_pid_good(Service *s) {
1859 assert(s);
1860
1861 return s->control_pid > 0;
1862 }
1863
1864 static int cgroup_good(Service *s) {
1865 int r;
1866
1867 assert(s);
1868
1869 if ((r = cgroup_bonding_is_empty_list(UNIT(s)->cgroup_bondings)) < 0)
1870 return r;
1871
1872 return !r;
1873 }
1874
1875 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1876 int r;
1877 assert(s);
1878
1879 if (f != SERVICE_SUCCESS)
1880 s->result = f;
1881
1882 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1883
1884 if (allow_restart &&
1885 !s->forbid_restart &&
1886 (s->restart == SERVICE_RESTART_ALWAYS ||
1887 (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1888 (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1889 (s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
1890 s->result == SERVICE_FAILURE_CORE_DUMP))) &&
1891 (s->result != SERVICE_FAILURE_EXIT_CODE ||
1892 !set_contains(s->restart_ignore_status.code, INT_TO_PTR(s->main_exec_status.status))) &&
1893 (s->result != SERVICE_FAILURE_SIGNAL ||
1894 !set_contains(s->restart_ignore_status.signal, INT_TO_PTR(s->main_exec_status.status)))
1895 ) {
1896
1897 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->restart_usec, &s->timer_watch);
1898 if (r < 0)
1899 goto fail;
1900
1901 service_set_state(s, SERVICE_AUTO_RESTART);
1902 }
1903
1904 s->forbid_restart = false;
1905
1906 return;
1907
1908 fail:
1909 log_warning_unit(UNIT(s)->id,
1910 "%s failed to run install restart timer: %s",
1911 UNIT(s)->id, strerror(-r));
1912 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1913 }
1914
1915 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
1916
1917 static void service_enter_stop_post(Service *s, ServiceResult f) {
1918 int r;
1919 assert(s);
1920
1921 if (f != SERVICE_SUCCESS)
1922 s->result = f;
1923
1924 service_unwatch_control_pid(s);
1925
1926 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1927 s->control_command_id = SERVICE_EXEC_STOP_POST;
1928
1929 r = service_spawn(s,
1930 s->control_command,
1931 true,
1932 false,
1933 !s->permissions_start_only,
1934 !s->root_directory_start_only,
1935 true,
1936 false,
1937 true,
1938 &s->control_pid);
1939 if (r < 0)
1940 goto fail;
1941
1942
1943 service_set_state(s, SERVICE_STOP_POST);
1944 } else
1945 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1946
1947 return;
1948
1949 fail:
1950 log_warning_unit(UNIT(s)->id,
1951 "%s failed to run 'stop-post' task: %s",
1952 UNIT(s)->id, strerror(-r));
1953 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1954 }
1955
1956 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1957 int r;
1958
1959 assert(s);
1960
1961 if (f != SERVICE_SUCCESS)
1962 s->result = f;
1963
1964 r = unit_kill_context(
1965 UNIT(s),
1966 &s->kill_context,
1967 state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM,
1968 s->main_pid,
1969 s->control_pid,
1970 s->main_pid_alien);
1971 if (r < 0)
1972 goto fail;
1973
1974 if (r > 0) {
1975 if (s->timeout_stop_usec > 0) {
1976 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_stop_usec, &s->timer_watch);
1977 if (r < 0)
1978 goto fail;
1979 }
1980
1981 service_set_state(s, state);
1982 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1983 service_enter_stop_post(s, SERVICE_SUCCESS);
1984 else
1985 service_enter_dead(s, SERVICE_SUCCESS, true);
1986
1987 return;
1988
1989 fail:
1990 log_warning_unit(UNIT(s)->id,
1991 "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1992
1993 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1994 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1995 else
1996 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1997 }
1998
1999 static void service_enter_stop(Service *s, ServiceResult f) {
2000 int r;
2001
2002 assert(s);
2003
2004 if (f != SERVICE_SUCCESS)
2005 s->result = f;
2006
2007 service_unwatch_control_pid(s);
2008
2009 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
2010 s->control_command_id = SERVICE_EXEC_STOP;
2011
2012 r = service_spawn(s,
2013 s->control_command,
2014 true,
2015 false,
2016 !s->permissions_start_only,
2017 !s->root_directory_start_only,
2018 false,
2019 false,
2020 true,
2021 &s->control_pid);
2022 if (r < 0)
2023 goto fail;
2024
2025 service_set_state(s, SERVICE_STOP);
2026 } else
2027 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2028
2029 return;
2030
2031 fail:
2032 log_warning_unit(UNIT(s)->id,
2033 "%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2034 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2035 }
2036
2037 static void service_enter_running(Service *s, ServiceResult f) {
2038 int main_pid_ok, cgroup_ok;
2039 assert(s);
2040
2041 if (f != SERVICE_SUCCESS)
2042 s->result = f;
2043
2044 main_pid_ok = main_pid_good(s);
2045 cgroup_ok = cgroup_good(s);
2046
2047 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2048 (s->bus_name_good || s->type != SERVICE_DBUS))
2049 service_set_state(s, SERVICE_RUNNING);
2050 else if (s->remain_after_exit)
2051 service_set_state(s, SERVICE_EXITED);
2052 else
2053 service_enter_stop(s, SERVICE_SUCCESS);
2054 }
2055
2056 static void service_enter_start_post(Service *s) {
2057 int r;
2058 assert(s);
2059
2060 service_unwatch_control_pid(s);
2061
2062 if (s->watchdog_usec > 0)
2063 service_reset_watchdog(s);
2064
2065 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
2066 s->control_command_id = SERVICE_EXEC_START_POST;
2067
2068 r = service_spawn(s,
2069 s->control_command,
2070 true,
2071 false,
2072 !s->permissions_start_only,
2073 !s->root_directory_start_only,
2074 false,
2075 false,
2076 true,
2077 &s->control_pid);
2078 if (r < 0)
2079 goto fail;
2080
2081 service_set_state(s, SERVICE_START_POST);
2082 } else
2083 service_enter_running(s, SERVICE_SUCCESS);
2084
2085 return;
2086
2087 fail:
2088 log_warning_unit(UNIT(s)->id,
2089 "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2090 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2091 }
2092
2093 static void service_enter_start(Service *s) {
2094 pid_t pid;
2095 int r;
2096 ExecCommand *c;
2097
2098 assert(s);
2099
2100 assert(s->exec_command[SERVICE_EXEC_START]);
2101 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2102
2103 if (s->type == SERVICE_FORKING)
2104 service_unwatch_control_pid(s);
2105 else
2106 service_unwatch_main_pid(s);
2107
2108 /* We want to ensure that nobody leaks processes from
2109 * START_PRE here, so let's go on a killing spree, People
2110 * should not spawn long running processes from START_PRE. */
2111 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, true, NULL, "control");
2112
2113 if (s->type == SERVICE_FORKING) {
2114 s->control_command_id = SERVICE_EXEC_START;
2115 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2116
2117 s->main_command = NULL;
2118 } else {
2119 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2120 s->control_command = NULL;
2121
2122 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2123 }
2124
2125 r = service_spawn(s,
2126 c,
2127 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
2128 true,
2129 true,
2130 true,
2131 true,
2132 s->notify_access != NOTIFY_NONE,
2133 false,
2134 &pid);
2135 if (r < 0)
2136 goto fail;
2137
2138 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
2139 /* For simple services we immediately start
2140 * the START_POST binaries. */
2141
2142 service_set_main_pid(s, pid);
2143 service_enter_start_post(s);
2144
2145 } else if (s->type == SERVICE_FORKING) {
2146
2147 /* For forking services we wait until the start
2148 * process exited. */
2149
2150 s->control_pid = pid;
2151 service_set_state(s, SERVICE_START);
2152
2153 } else if (s->type == SERVICE_ONESHOT ||
2154 s->type == SERVICE_DBUS ||
2155 s->type == SERVICE_NOTIFY) {
2156
2157 /* For oneshot services we wait until the start
2158 * process exited, too, but it is our main process. */
2159
2160 /* For D-Bus services we know the main pid right away,
2161 * but wait for the bus name to appear on the
2162 * bus. Notify services are similar. */
2163
2164 service_set_main_pid(s, pid);
2165 service_set_state(s, SERVICE_START);
2166 } else
2167 assert_not_reached("Unknown service type");
2168
2169 return;
2170
2171 fail:
2172 log_warning_unit(UNIT(s)->id,
2173 "%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2174 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2175 }
2176
2177 static void service_enter_start_pre(Service *s) {
2178 int r;
2179
2180 assert(s);
2181
2182 service_unwatch_control_pid(s);
2183
2184 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2185
2186 /* Before we start anything, let's clear up what might
2187 * be left from previous runs. */
2188 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, true, NULL, "control");
2189
2190 s->control_command_id = SERVICE_EXEC_START_PRE;
2191
2192 r = service_spawn(s,
2193 s->control_command,
2194 true,
2195 false,
2196 !s->permissions_start_only,
2197 !s->root_directory_start_only,
2198 true,
2199 false,
2200 true,
2201 &s->control_pid);
2202 if (r < 0)
2203 goto fail;
2204
2205 service_set_state(s, SERVICE_START_PRE);
2206 } else
2207 service_enter_start(s);
2208
2209 return;
2210
2211 fail:
2212 log_warning_unit(UNIT(s)->id,
2213 "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2214 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2215 }
2216
2217 static void service_enter_restart(Service *s) {
2218 int r;
2219 DBusError error;
2220
2221 assert(s);
2222 dbus_error_init(&error);
2223
2224 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2225 /* Don't restart things if we are going down anyway */
2226 log_info_unit(UNIT(s)->id,
2227 "Stop job pending for unit, delaying automatic restart.");
2228
2229 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->restart_usec, &s->timer_watch);
2230 if (r < 0)
2231 goto fail;
2232
2233 return;
2234 }
2235
2236 /* Any units that are bound to this service must also be
2237 * restarted. We use JOB_RESTART (instead of the more obvious
2238 * JOB_START) here so that those dependency jobs will be added
2239 * as well. */
2240 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
2241 if (r < 0)
2242 goto fail;
2243
2244 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2245 * it will be canceled as part of the service_stop() call that
2246 * is executed as part of JOB_RESTART. */
2247
2248 log_debug_unit(UNIT(s)->id,
2249 "%s scheduled restart job.", UNIT(s)->id);
2250 return;
2251
2252 fail:
2253 log_warning_unit(UNIT(s)->id,
2254 "%s failed to schedule restart job: %s",
2255 UNIT(s)->id, bus_error(&error, -r));
2256 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2257
2258 dbus_error_free(&error);
2259 }
2260
2261 static void service_enter_reload(Service *s) {
2262 int r;
2263
2264 assert(s);
2265
2266 service_unwatch_control_pid(s);
2267
2268 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2269 s->control_command_id = SERVICE_EXEC_RELOAD;
2270
2271 r = service_spawn(s,
2272 s->control_command,
2273 true,
2274 false,
2275 !s->permissions_start_only,
2276 !s->root_directory_start_only,
2277 false,
2278 false,
2279 true,
2280 &s->control_pid);
2281 if (r < 0)
2282 goto fail;
2283
2284 service_set_state(s, SERVICE_RELOAD);
2285 } else
2286 service_enter_running(s, SERVICE_SUCCESS);
2287
2288 return;
2289
2290 fail:
2291 log_warning_unit(UNIT(s)->id,
2292 "%s failed to run 'reload' task: %s",
2293 UNIT(s)->id, strerror(-r));
2294 s->reload_result = SERVICE_FAILURE_RESOURCES;
2295 service_enter_running(s, SERVICE_SUCCESS);
2296 }
2297
2298 static void service_run_next_control(Service *s) {
2299 int r;
2300
2301 assert(s);
2302 assert(s->control_command);
2303 assert(s->control_command->command_next);
2304
2305 assert(s->control_command_id != SERVICE_EXEC_START);
2306
2307 s->control_command = s->control_command->command_next;
2308 service_unwatch_control_pid(s);
2309
2310 r = service_spawn(s,
2311 s->control_command,
2312 true,
2313 false,
2314 !s->permissions_start_only,
2315 !s->root_directory_start_only,
2316 s->control_command_id == SERVICE_EXEC_START_PRE ||
2317 s->control_command_id == SERVICE_EXEC_STOP_POST,
2318 false,
2319 true,
2320 &s->control_pid);
2321 if (r < 0)
2322 goto fail;
2323
2324 return;
2325
2326 fail:
2327 log_warning_unit(UNIT(s)->id,
2328 "%s failed to run next control task: %s",
2329 UNIT(s)->id, strerror(-r));
2330
2331 if (s->state == SERVICE_START_PRE)
2332 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2333 else if (s->state == SERVICE_STOP)
2334 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2335 else if (s->state == SERVICE_STOP_POST)
2336 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2337 else if (s->state == SERVICE_RELOAD) {
2338 s->reload_result = SERVICE_FAILURE_RESOURCES;
2339 service_enter_running(s, SERVICE_SUCCESS);
2340 } else
2341 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2342 }
2343
2344 static void service_run_next_main(Service *s) {
2345 pid_t pid;
2346 int r;
2347
2348 assert(s);
2349 assert(s->main_command);
2350 assert(s->main_command->command_next);
2351 assert(s->type == SERVICE_ONESHOT);
2352
2353 s->main_command = s->main_command->command_next;
2354 service_unwatch_main_pid(s);
2355
2356 r = service_spawn(s,
2357 s->main_command,
2358 true,
2359 true,
2360 true,
2361 true,
2362 true,
2363 s->notify_access != NOTIFY_NONE,
2364 false,
2365 &pid);
2366 if (r < 0)
2367 goto fail;
2368
2369 service_set_main_pid(s, pid);
2370
2371 return;
2372
2373 fail:
2374 log_warning_unit(UNIT(s)->id,
2375 "%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2376 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2377 }
2378
2379 static int service_start_limit_test(Service *s) {
2380 assert(s);
2381
2382 if (ratelimit_test(&s->start_limit))
2383 return 0;
2384
2385 switch (s->start_limit_action) {
2386
2387 case SERVICE_START_LIMIT_NONE:
2388 log_warning_unit(UNIT(s)->id,
2389 "%s start request repeated too quickly, refusing to start.",
2390 UNIT(s)->id);
2391 break;
2392
2393 case SERVICE_START_LIMIT_REBOOT: {
2394 DBusError error;
2395 int r;
2396
2397 dbus_error_init(&error);
2398
2399 log_warning_unit(UNIT(s)->id,
2400 "%s start request repeated too quickly, rebooting.", UNIT(s)->id);
2401
2402 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE, true, &error, NULL);
2403 if (r < 0) {
2404 log_error_unit(UNIT(s)->id,
2405 "Failed to reboot: %s.", bus_error(&error, r));
2406 dbus_error_free(&error);
2407 }
2408
2409 break;
2410 }
2411
2412 case SERVICE_START_LIMIT_REBOOT_FORCE:
2413 log_warning_unit(UNIT(s)->id,
2414 "%s start request repeated too quickly, forcibly rebooting.", UNIT(s)->id);
2415 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2416 break;
2417
2418 case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
2419 log_warning_unit(UNIT(s)->id,
2420 "%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
2421 sync();
2422 reboot(RB_AUTOBOOT);
2423 break;
2424
2425 default:
2426 log_error_unit(UNIT(s)->id,
2427 "start limit action=%i", s->start_limit_action);
2428 assert_not_reached("Unknown StartLimitAction.");
2429 }
2430
2431 return -ECANCELED;
2432 }
2433
2434 static int service_start(Unit *u) {
2435 Service *s = SERVICE(u);
2436 int r;
2437
2438 assert(s);
2439
2440 /* We cannot fulfill this request right now, try again later
2441 * please! */
2442 if (s->state == SERVICE_STOP ||
2443 s->state == SERVICE_STOP_SIGTERM ||
2444 s->state == SERVICE_STOP_SIGKILL ||
2445 s->state == SERVICE_STOP_POST ||
2446 s->state == SERVICE_FINAL_SIGTERM ||
2447 s->state == SERVICE_FINAL_SIGKILL)
2448 return -EAGAIN;
2449
2450 /* Already on it! */
2451 if (s->state == SERVICE_START_PRE ||
2452 s->state == SERVICE_START ||
2453 s->state == SERVICE_START_POST)
2454 return 0;
2455
2456 /* A service that will be restarted must be stopped first to
2457 * trigger BindsTo and/or OnFailure dependencies. If a user
2458 * does not want to wait for the holdoff time to elapse, the
2459 * service should be manually restarted, not started. We
2460 * simply return EAGAIN here, so that any start jobs stay
2461 * queued, and assume that the auto restart timer will
2462 * eventually trigger the restart. */
2463 if (s->state == SERVICE_AUTO_RESTART)
2464 return -EAGAIN;
2465
2466 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
2467
2468 /* Make sure we don't enter a busy loop of some kind. */
2469 r = service_start_limit_test(s);
2470 if (r < 0) {
2471 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
2472 return r;
2473 }
2474
2475 s->result = SERVICE_SUCCESS;
2476 s->reload_result = SERVICE_SUCCESS;
2477 s->main_pid_known = false;
2478 s->main_pid_alien = false;
2479 s->forbid_restart = false;
2480
2481 service_enter_start_pre(s);
2482 return 0;
2483 }
2484
2485 static int service_stop(Unit *u) {
2486 Service *s = SERVICE(u);
2487
2488 assert(s);
2489
2490 /* Don't create restart jobs from here. */
2491 s->forbid_restart = true;
2492
2493 /* Already on it */
2494 if (s->state == SERVICE_STOP ||
2495 s->state == SERVICE_STOP_SIGTERM ||
2496 s->state == SERVICE_STOP_SIGKILL ||
2497 s->state == SERVICE_STOP_POST ||
2498 s->state == SERVICE_FINAL_SIGTERM ||
2499 s->state == SERVICE_FINAL_SIGKILL)
2500 return 0;
2501
2502 /* A restart will be scheduled or is in progress. */
2503 if (s->state == SERVICE_AUTO_RESTART) {
2504 service_set_state(s, SERVICE_DEAD);
2505 return 0;
2506 }
2507
2508 /* If there's already something running we go directly into
2509 * kill mode. */
2510 if (s->state == SERVICE_START_PRE ||
2511 s->state == SERVICE_START ||
2512 s->state == SERVICE_START_POST ||
2513 s->state == SERVICE_RELOAD) {
2514 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2515 return 0;
2516 }
2517
2518 assert(s->state == SERVICE_RUNNING ||
2519 s->state == SERVICE_EXITED);
2520
2521 service_enter_stop(s, SERVICE_SUCCESS);
2522 return 0;
2523 }
2524
2525 static int service_reload(Unit *u) {
2526 Service *s = SERVICE(u);
2527
2528 assert(s);
2529
2530 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2531
2532 service_enter_reload(s);
2533 return 0;
2534 }
2535
2536 static bool service_can_reload(Unit *u) {
2537 Service *s = SERVICE(u);
2538
2539 assert(s);
2540
2541 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2542 }
2543
2544 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2545 Service *s = SERVICE(u);
2546
2547 assert(u);
2548 assert(f);
2549 assert(fds);
2550
2551 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2552 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2553 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2554
2555 if (s->control_pid > 0)
2556 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2557
2558 if (s->main_pid_known && s->main_pid > 0)
2559 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2560
2561 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2562
2563 if (s->status_text)
2564 unit_serialize_item(u, f, "status-text", s->status_text);
2565
2566 /* FIXME: There's a minor uncleanliness here: if there are
2567 * multiple commands attached here, we will start from the
2568 * first one again */
2569 if (s->control_command_id >= 0)
2570 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2571
2572 if (s->socket_fd >= 0) {
2573 int copy;
2574
2575 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2576 return copy;
2577
2578 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2579 }
2580
2581 if (s->main_exec_status.pid > 0) {
2582 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2583 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2584 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2585
2586 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2587 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2588 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2589 }
2590 }
2591 if (dual_timestamp_is_set(&s->watchdog_timestamp))
2592 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2593
2594 return 0;
2595 }
2596
2597 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2598 Service *s = SERVICE(u);
2599
2600 assert(u);
2601 assert(key);
2602 assert(value);
2603 assert(fds);
2604
2605 if (streq(key, "state")) {
2606 ServiceState state;
2607
2608 if ((state = service_state_from_string(value)) < 0)
2609 log_debug_unit(u->id, "Failed to parse state value %s", value);
2610 else
2611 s->deserialized_state = state;
2612 } else if (streq(key, "result")) {
2613 ServiceResult f;
2614
2615 f = service_result_from_string(value);
2616 if (f < 0)
2617 log_debug_unit(u->id, "Failed to parse result value %s", value);
2618 else if (f != SERVICE_SUCCESS)
2619 s->result = f;
2620
2621 } else if (streq(key, "reload-result")) {
2622 ServiceResult f;
2623
2624 f = service_result_from_string(value);
2625 if (f < 0)
2626 log_debug_unit(u->id, "Failed to parse reload result value %s", value);
2627 else if (f != SERVICE_SUCCESS)
2628 s->reload_result = f;
2629
2630 } else if (streq(key, "control-pid")) {
2631 pid_t pid;
2632
2633 if (parse_pid(value, &pid) < 0)
2634 log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
2635 else
2636 s->control_pid = pid;
2637 } else if (streq(key, "main-pid")) {
2638 pid_t pid;
2639
2640 if (parse_pid(value, &pid) < 0)
2641 log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
2642 else
2643 service_set_main_pid(s, (pid_t) pid);
2644 } else if (streq(key, "main-pid-known")) {
2645 int b;
2646
2647 if ((b = parse_boolean(value)) < 0)
2648 log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
2649 else
2650 s->main_pid_known = b;
2651 } else if (streq(key, "status-text")) {
2652 char *t;
2653
2654 if ((t = strdup(value))) {
2655 free(s->status_text);
2656 s->status_text = t;
2657 }
2658
2659 } else if (streq(key, "control-command")) {
2660 ServiceExecCommand id;
2661
2662 if ((id = service_exec_command_from_string(value)) < 0)
2663 log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
2664 else {
2665 s->control_command_id = id;
2666 s->control_command = s->exec_command[id];
2667 }
2668 } else if (streq(key, "socket-fd")) {
2669 int fd;
2670
2671 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2672 log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
2673 else {
2674
2675 if (s->socket_fd >= 0)
2676 close_nointr_nofail(s->socket_fd);
2677 s->socket_fd = fdset_remove(fds, fd);
2678 }
2679 } else if (streq(key, "main-exec-status-pid")) {
2680 pid_t pid;
2681
2682 if (parse_pid(value, &pid) < 0)
2683 log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
2684 else
2685 s->main_exec_status.pid = pid;
2686 } else if (streq(key, "main-exec-status-code")) {
2687 int i;
2688
2689 if (safe_atoi(value, &i) < 0)
2690 log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
2691 else
2692 s->main_exec_status.code = i;
2693 } else if (streq(key, "main-exec-status-status")) {
2694 int i;
2695
2696 if (safe_atoi(value, &i) < 0)
2697 log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
2698 else
2699 s->main_exec_status.status = i;
2700 } else if (streq(key, "main-exec-status-start"))
2701 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2702 else if (streq(key, "main-exec-status-exit"))
2703 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2704 else if (streq(key, "watchdog-timestamp"))
2705 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2706 else
2707 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
2708
2709 return 0;
2710 }
2711
2712 static UnitActiveState service_active_state(Unit *u) {
2713 const UnitActiveState *table;
2714
2715 assert(u);
2716
2717 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2718
2719 return table[SERVICE(u)->state];
2720 }
2721
2722 static const char *service_sub_state_to_string(Unit *u) {
2723 assert(u);
2724
2725 return service_state_to_string(SERVICE(u)->state);
2726 }
2727
2728 static bool service_check_gc(Unit *u) {
2729 Service *s = SERVICE(u);
2730
2731 assert(s);
2732
2733 /* Never clean up services that still have a process around,
2734 * even if the service is formally dead. */
2735 if (cgroup_good(s) > 0 ||
2736 main_pid_good(s) > 0 ||
2737 control_pid_good(s) > 0)
2738 return true;
2739
2740 #ifdef HAVE_SYSV_COMPAT
2741 if (s->is_sysv)
2742 return true;
2743 #endif
2744
2745 return false;
2746 }
2747
2748 static bool service_check_snapshot(Unit *u) {
2749 Service *s = SERVICE(u);
2750
2751 assert(s);
2752
2753 return !s->got_socket_fd;
2754 }
2755
2756 static int service_retry_pid_file(Service *s) {
2757 int r;
2758
2759 assert(s->pid_file);
2760 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2761
2762 r = service_load_pid_file(s, false);
2763 if (r < 0)
2764 return r;
2765
2766 service_unwatch_pid_file(s);
2767
2768 service_enter_running(s, SERVICE_SUCCESS);
2769 return 0;
2770 }
2771
2772 static int service_watch_pid_file(Service *s) {
2773 int r;
2774
2775 log_debug_unit(UNIT(s)->id,
2776 "Setting watch for %s's PID file %s",
2777 UNIT(s)->id, s->pid_file_pathspec->path);
2778 r = path_spec_watch(s->pid_file_pathspec, UNIT(s));
2779 if (r < 0)
2780 goto fail;
2781
2782 /* the pidfile might have appeared just before we set the watch */
2783 service_retry_pid_file(s);
2784
2785 return 0;
2786 fail:
2787 log_error_unit(UNIT(s)->id,
2788 "Failed to set a watch for %s's PID file %s: %s",
2789 UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2790 service_unwatch_pid_file(s);
2791 return r;
2792 }
2793
2794 static int service_demand_pid_file(Service *s) {
2795 PathSpec *ps;
2796
2797 assert(s->pid_file);
2798 assert(!s->pid_file_pathspec);
2799
2800 ps = new0(PathSpec, 1);
2801 if (!ps)
2802 return -ENOMEM;
2803
2804 ps->path = strdup(s->pid_file);
2805 if (!ps->path) {
2806 free(ps);
2807 return -ENOMEM;
2808 }
2809
2810 path_kill_slashes(ps->path);
2811
2812 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2813 * keep their PID file open all the time. */
2814 ps->type = PATH_MODIFIED;
2815 ps->inotify_fd = -1;
2816
2817 s->pid_file_pathspec = ps;
2818
2819 return service_watch_pid_file(s);
2820 }
2821
2822 static void service_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
2823 Service *s = SERVICE(u);
2824
2825 assert(s);
2826 assert(fd >= 0);
2827 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2828 assert(s->pid_file_pathspec);
2829 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2830
2831 log_debug_unit(u->id, "inotify event for %s", u->id);
2832
2833 if (path_spec_fd_event(s->pid_file_pathspec, events) < 0)
2834 goto fail;
2835
2836 if (service_retry_pid_file(s) == 0)
2837 return;
2838
2839 if (service_watch_pid_file(s) < 0)
2840 goto fail;
2841
2842 return;
2843 fail:
2844 service_unwatch_pid_file(s);
2845 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2846 }
2847
2848 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2849 Service *s = SERVICE(u);
2850 ServiceResult f;
2851
2852 assert(s);
2853 assert(pid >= 0);
2854
2855 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2856 is_clean_exit_lsb(code, status, &s->success_status))
2857 f = SERVICE_SUCCESS;
2858 else if (code == CLD_EXITED)
2859 f = SERVICE_FAILURE_EXIT_CODE;
2860 else if (code == CLD_KILLED)
2861 f = SERVICE_FAILURE_SIGNAL;
2862 else if (code == CLD_DUMPED)
2863 f = SERVICE_FAILURE_CORE_DUMP;
2864 else
2865 assert_not_reached("Unknown code");
2866
2867 if (s->main_pid == pid) {
2868 /* Forking services may occasionally move to a new PID.
2869 * As long as they update the PID file before exiting the old
2870 * PID, they're fine. */
2871 if (service_load_pid_file(s, false) == 0)
2872 return;
2873
2874 s->main_pid = 0;
2875 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2876
2877 if (s->main_command) {
2878 /* If this is not a forking service than the
2879 * main process got started and hence we copy
2880 * the exit status so that it is recorded both
2881 * as main and as control process exit
2882 * status */
2883
2884 s->main_command->exec_status = s->main_exec_status;
2885
2886 if (s->main_command->ignore)
2887 f = SERVICE_SUCCESS;
2888 } else if (s->exec_command[SERVICE_EXEC_START]) {
2889
2890 /* If this is a forked process, then we should
2891 * ignore the return value if this was
2892 * configured for the starter process */
2893
2894 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2895 f = SERVICE_SUCCESS;
2896 }
2897
2898 log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2899 u->id,
2900 "MESSAGE=%s: main process exited, code=%s, status=%i/%s",
2901 u->id, sigchld_code_to_string(code), status,
2902 strna(code == CLD_EXITED
2903 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2904 : signal_to_string(status)),
2905 "EXIT_CODE=%s", sigchld_code_to_string(code),
2906 "EXIT_STATUS=%i", status,
2907 NULL);
2908
2909 if (f != SERVICE_SUCCESS)
2910 s->result = f;
2911
2912 if (s->main_command &&
2913 s->main_command->command_next &&
2914 f == SERVICE_SUCCESS) {
2915
2916 /* There is another command to *
2917 * execute, so let's do that. */
2918
2919 log_debug_unit(u->id,
2920 "%s running next main command for state %s",
2921 u->id, service_state_to_string(s->state));
2922 service_run_next_main(s);
2923
2924 } else {
2925
2926 /* The service exited, so the service is officially
2927 * gone. */
2928 s->main_command = NULL;
2929
2930 switch (s->state) {
2931
2932 case SERVICE_START_POST:
2933 case SERVICE_RELOAD:
2934 case SERVICE_STOP:
2935 /* Need to wait until the operation is
2936 * done */
2937 break;
2938
2939 case SERVICE_START:
2940 if (s->type == SERVICE_ONESHOT) {
2941 /* This was our main goal, so let's go on */
2942 if (f == SERVICE_SUCCESS)
2943 service_enter_start_post(s);
2944 else
2945 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2946 break;
2947 }
2948
2949 /* Fall through */
2950
2951 case SERVICE_RUNNING:
2952 service_enter_running(s, f);
2953 break;
2954
2955 case SERVICE_STOP_SIGTERM:
2956 case SERVICE_STOP_SIGKILL:
2957
2958 if (!control_pid_good(s))
2959 service_enter_stop_post(s, f);
2960
2961 /* If there is still a control process, wait for that first */
2962 break;
2963
2964 default:
2965 assert_not_reached("Uh, main process died at wrong time.");
2966 }
2967 }
2968
2969 } else if (s->control_pid == pid) {
2970
2971 s->control_pid = 0;
2972
2973 if (s->control_command) {
2974 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2975
2976 if (s->control_command->ignore)
2977 f = SERVICE_SUCCESS;
2978 }
2979
2980 log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
2981 "%s: control process exited, code=%s status=%i",
2982 u->id, sigchld_code_to_string(code), status);
2983
2984 if (f != SERVICE_SUCCESS)
2985 s->result = f;
2986
2987 /* Immediately get rid of the cgroup, so that the
2988 * kernel doesn't delay the cgroup empty messages for
2989 * the service cgroup any longer than necessary */
2990 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, true, NULL, "control");
2991
2992 if (s->control_command &&
2993 s->control_command->command_next &&
2994 f == SERVICE_SUCCESS) {
2995
2996 /* There is another command to *
2997 * execute, so let's do that. */
2998
2999 log_debug_unit(u->id,
3000 "%s running next control command for state %s",
3001 u->id, service_state_to_string(s->state));
3002 service_run_next_control(s);
3003
3004 } else {
3005 /* No further commands for this step, so let's
3006 * figure out what to do next */
3007
3008 s->control_command = NULL;
3009 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3010
3011 log_debug_unit(u->id,
3012 "%s got final SIGCHLD for state %s",
3013 u->id, service_state_to_string(s->state));
3014
3015 switch (s->state) {
3016
3017 case SERVICE_START_PRE:
3018 if (f == SERVICE_SUCCESS)
3019 service_enter_start(s);
3020 else
3021 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3022 break;
3023
3024 case SERVICE_START:
3025 if (s->type != SERVICE_FORKING)
3026 /* Maybe spurious event due to a reload that changed the type? */
3027 break;
3028
3029 if (f != SERVICE_SUCCESS) {
3030 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3031 break;
3032 }
3033
3034 if (s->pid_file) {
3035 bool has_start_post;
3036 int r;
3037
3038 /* Let's try to load the pid file here if we can.
3039 * The PID file might actually be created by a START_POST
3040 * script. In that case don't worry if the loading fails. */
3041
3042 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3043 r = service_load_pid_file(s, !has_start_post);
3044 if (!has_start_post && r < 0) {
3045 r = service_demand_pid_file(s);
3046 if (r < 0 || !cgroup_good(s))
3047 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3048 break;
3049 }
3050 } else
3051 service_search_main_pid(s);
3052
3053 service_enter_start_post(s);
3054 break;
3055
3056 case SERVICE_START_POST:
3057 if (f != SERVICE_SUCCESS) {
3058 service_enter_stop(s, f);
3059 break;
3060 }
3061
3062 if (s->pid_file) {
3063 int r;
3064
3065 r = service_load_pid_file(s, true);
3066 if (r < 0) {
3067 r = service_demand_pid_file(s);
3068 if (r < 0 || !cgroup_good(s))
3069 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3070 break;
3071 }
3072 } else
3073 service_search_main_pid(s);
3074
3075 service_enter_running(s, SERVICE_SUCCESS);
3076 break;
3077
3078 case SERVICE_RELOAD:
3079 if (f == SERVICE_SUCCESS) {
3080 service_load_pid_file(s, true);
3081 service_search_main_pid(s);
3082 }
3083
3084 s->reload_result = f;
3085 service_enter_running(s, SERVICE_SUCCESS);
3086 break;
3087
3088 case SERVICE_STOP:
3089 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3090 break;
3091
3092 case SERVICE_STOP_SIGTERM:
3093 case SERVICE_STOP_SIGKILL:
3094 if (main_pid_good(s) <= 0)
3095 service_enter_stop_post(s, f);
3096
3097 /* If there is still a service
3098 * process around, wait until
3099 * that one quit, too */
3100 break;
3101
3102 case SERVICE_STOP_POST:
3103 case SERVICE_FINAL_SIGTERM:
3104 case SERVICE_FINAL_SIGKILL:
3105 service_enter_dead(s, f, true);
3106 break;
3107
3108 default:
3109 assert_not_reached("Uh, control process died at wrong time.");
3110 }
3111 }
3112 }
3113
3114 /* Notify clients about changed exit status */
3115 unit_add_to_dbus_queue(u);
3116 }
3117
3118 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
3119 Service *s = SERVICE(u);
3120
3121 assert(s);
3122 assert(elapsed == 1);
3123
3124 if (w == &s->watchdog_watch) {
3125 service_handle_watchdog(s);
3126 return;
3127 }
3128
3129 assert(w == &s->timer_watch);
3130
3131 switch (s->state) {
3132
3133 case SERVICE_START_PRE:
3134 case SERVICE_START:
3135 log_warning_unit(u->id,
3136 "%s operation timed out. Terminating.", u->id);
3137 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3138 break;
3139
3140 case SERVICE_START_POST:
3141 log_warning_unit(u->id,
3142 "%s operation timed out. Stopping.", u->id);
3143 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3144 break;
3145
3146 case SERVICE_RELOAD:
3147 log_warning_unit(u->id,
3148 "%s operation timed out. Stopping.", u->id);
3149 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3150 service_enter_running(s, SERVICE_SUCCESS);
3151 break;
3152
3153 case SERVICE_STOP:
3154 log_warning_unit(u->id,
3155 "%s stopping timed out. Terminating.", u->id);
3156 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3157 break;
3158
3159 case SERVICE_STOP_SIGTERM:
3160 if (s->kill_context.send_sigkill) {
3161 log_warning_unit(u->id,
3162 "%s stopping timed out. Killing.", u->id);
3163 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3164 } else {
3165 log_warning_unit(u->id,
3166 "%s stopping timed out. Skipping SIGKILL.", u->id);
3167 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3168 }
3169
3170 break;
3171
3172 case SERVICE_STOP_SIGKILL:
3173 /* Uh, we sent a SIGKILL and it is still not gone?
3174 * Must be something we cannot kill, so let's just be
3175 * weirded out and continue */
3176
3177 log_warning_unit(u->id,
3178 "%s still around after SIGKILL. Ignoring.", u->id);
3179 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3180 break;
3181
3182 case SERVICE_STOP_POST:
3183 log_warning_unit(u->id,
3184 "%s stopping timed out (2). Terminating.", u->id);
3185 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3186 break;
3187
3188 case SERVICE_FINAL_SIGTERM:
3189 if (s->kill_context.send_sigkill) {
3190 log_warning_unit(u->id,
3191 "%s stopping timed out (2). Killing.", u->id);
3192 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3193 } else {
3194 log_warning_unit(u->id,
3195 "%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.",
3196 u->id);
3197 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3198 }
3199
3200 break;
3201
3202 case SERVICE_FINAL_SIGKILL:
3203 log_warning_unit(u->id,
3204 "%s still around after SIGKILL (2). Entering failed mode.", u->id);
3205 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3206 break;
3207
3208 case SERVICE_AUTO_RESTART:
3209 log_info_unit(u->id,
3210 "%s holdoff time over, scheduling restart.", u->id);
3211 service_enter_restart(s);
3212 break;
3213
3214 default:
3215 assert_not_reached("Timeout at wrong time.");
3216 }
3217 }
3218
3219 static void service_cgroup_notify_event(Unit *u) {
3220 Service *s = SERVICE(u);
3221
3222 assert(u);
3223
3224 log_debug_unit(u->id,
3225 "%s: cgroup is empty", u->id);
3226
3227 switch (s->state) {
3228
3229 /* Waiting for SIGCHLD is usually more interesting,
3230 * because it includes return codes/signals. Which is
3231 * why we ignore the cgroup events for most cases,
3232 * except when we don't know pid which to expect the
3233 * SIGCHLD for. */
3234
3235 case SERVICE_START:
3236 case SERVICE_START_POST:
3237 /* If we were hoping for the daemon to write its PID file,
3238 * we can give up now. */
3239 if (s->pid_file_pathspec) {
3240 log_warning_unit(u->id,
3241 "%s never wrote its PID file. Failing.", UNIT(s)->id);
3242 service_unwatch_pid_file(s);
3243 if (s->state == SERVICE_START)
3244 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3245 else
3246 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3247 }
3248 break;
3249
3250 case SERVICE_RUNNING:
3251 /* service_enter_running() will figure out what to do */
3252 service_enter_running(s, SERVICE_SUCCESS);
3253 break;
3254
3255 case SERVICE_STOP_SIGTERM:
3256 case SERVICE_STOP_SIGKILL:
3257
3258 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3259 service_enter_stop_post(s, SERVICE_SUCCESS);
3260
3261 break;
3262
3263 case SERVICE_FINAL_SIGTERM:
3264 case SERVICE_FINAL_SIGKILL:
3265 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3266 service_enter_dead(s, SERVICE_SUCCESS, true);
3267
3268 break;
3269
3270 default:
3271 ;
3272 }
3273 }
3274
3275 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3276 Service *s = SERVICE(u);
3277 const char *e;
3278
3279 assert(u);
3280
3281 if (s->notify_access == NOTIFY_NONE) {
3282 log_warning_unit(u->id,
3283 "%s: Got notification message from PID %lu, but reception is disabled.",
3284 u->id, (unsigned long) pid);
3285 return;
3286 }
3287
3288 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3289 log_warning_unit(u->id,
3290 "%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3291 u->id, (unsigned long) pid, (unsigned long) s->main_pid);
3292 return;
3293 }
3294
3295 log_debug_unit(u->id,
3296 "%s: Got message", u->id);
3297
3298 /* Interpret MAINPID= */
3299 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3300 (s->state == SERVICE_START ||
3301 s->state == SERVICE_START_POST ||
3302 s->state == SERVICE_RUNNING ||
3303 s->state == SERVICE_RELOAD)) {
3304
3305 if (parse_pid(e + 8, &pid) < 0)
3306 log_warning_unit(u->id,
3307 "Failed to parse notification message %s", e);
3308 else {
3309 log_debug_unit(u->id,
3310 "%s: got %s", u->id, e);
3311 service_set_main_pid(s, pid);
3312 }
3313 }
3314
3315 /* Interpret READY= */
3316 if (s->type == SERVICE_NOTIFY &&
3317 s->state == SERVICE_START &&
3318 strv_find(tags, "READY=1")) {
3319 log_debug_unit(u->id,
3320 "%s: got READY=1", u->id);
3321
3322 service_enter_start_post(s);
3323 }
3324
3325 /* Interpret STATUS= */
3326 e = strv_find_prefix(tags, "STATUS=");
3327 if (e) {
3328 char *t;
3329
3330 if (e[7]) {
3331
3332 if (!utf8_is_valid(e+7)) {
3333 log_warning_unit(u->id,
3334 "Status message in notification is not UTF-8 clean.");
3335 return;
3336 }
3337
3338 t = strdup(e+7);
3339 if (!t) {
3340 log_error_unit(u->id,
3341 "Failed to allocate string.");
3342 return;
3343 }
3344
3345 log_debug_unit(u->id,
3346 "%s: got %s", u->id, e);
3347
3348 free(s->status_text);
3349 s->status_text = t;
3350 } else {
3351 free(s->status_text);
3352 s->status_text = NULL;
3353 }
3354
3355 }
3356 if (strv_find(tags, "WATCHDOG=1")) {
3357 log_debug_unit(u->id,
3358 "%s: got WATCHDOG=1", u->id);
3359 if (dual_timestamp_is_set(&s->watchdog_timestamp))
3360 service_reset_watchdog(s);
3361 }
3362
3363 /* Notify clients about changed status or main pid */
3364 unit_add_to_dbus_queue(u);
3365 }
3366
3367 #ifdef HAVE_SYSV_COMPAT
3368
3369 static int service_enumerate(Manager *m) {
3370 char **p;
3371 unsigned i;
3372 DIR *d = NULL;
3373 char *path = NULL, *fpath = NULL, *name = NULL;
3374 Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
3375 Unit *service;
3376 Iterator j;
3377 int r;
3378
3379 assert(m);
3380
3381 if (m->running_as != SYSTEMD_SYSTEM)
3382 return 0;
3383
3384 zero(runlevel_services);
3385
3386 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3387 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3388 struct dirent *de;
3389
3390 free(path);
3391 path = strjoin(*p, "/", rcnd_table[i].path, NULL);
3392 if (!path) {
3393 r = -ENOMEM;
3394 goto finish;
3395 }
3396
3397 if (d)
3398 closedir(d);
3399
3400 if (!(d = opendir(path))) {
3401 if (errno != ENOENT)
3402 log_warning("opendir() failed on %s: %s", path, strerror(errno));
3403
3404 continue;
3405 }
3406
3407 while ((de = readdir(d))) {
3408 int a, b;
3409
3410 if (ignore_file(de->d_name))
3411 continue;
3412
3413 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3414 continue;
3415
3416 if (strlen(de->d_name) < 4)
3417 continue;
3418
3419 a = undecchar(de->d_name[1]);
3420 b = undecchar(de->d_name[2]);
3421
3422 if (a < 0 || b < 0)
3423 continue;
3424
3425 free(fpath);
3426 fpath = strjoin(path, "/", de->d_name, NULL);
3427 if (!fpath) {
3428 r = -ENOMEM;
3429 goto finish;
3430 }
3431
3432 if (access(fpath, X_OK) < 0) {
3433
3434 if (errno != ENOENT)
3435 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3436
3437 continue;
3438 }
3439
3440 free(name);
3441 if (!(name = sysv_translate_name(de->d_name + 3))) {
3442 r = -ENOMEM;
3443 goto finish;
3444 }
3445
3446 r = manager_load_unit_prepare(m, name, NULL, NULL, &service);
3447 if (r < 0) {
3448 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3449 continue;
3450 }
3451
3452 if (de->d_name[0] == 'S') {
3453
3454 if (rcnd_table[i].type == RUNLEVEL_UP) {
3455 SERVICE(service)->sysv_start_priority_from_rcnd =
3456 MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3457
3458 SERVICE(service)->sysv_enabled = true;
3459 }
3460
3461 if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3462 goto finish;
3463
3464 if ((r = set_put(runlevel_services[i], service)) < 0)
3465 goto finish;
3466
3467 } else if (de->d_name[0] == 'K' &&
3468 (rcnd_table[i].type == RUNLEVEL_DOWN)) {
3469
3470 if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3471 goto finish;
3472
3473 if ((r = set_put(shutdown_services, service)) < 0)
3474 goto finish;
3475 }
3476 }
3477 }
3478
3479 /* Now we loaded all stubs and are aware of the lowest
3480 start-up priority for all services, not let's actually load
3481 the services, this will also tell us which services are
3482 actually native now */
3483 manager_dispatch_load_queue(m);
3484
3485 /* If this is a native service, rely on native ways to pull in
3486 * a service, don't pull it in via sysv rcN.d links. */
3487 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3488 SET_FOREACH(service, runlevel_services[i], j) {
3489 service = unit_follow_merge(service);
3490
3491 if (service->fragment_path)
3492 continue;
3493
3494 if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3495 goto finish;
3496 }
3497
3498 /* We honour K links only for halt/reboot. For the normal
3499 * runlevels we assume the stop jobs will be implicitly added
3500 * by the core logic. Also, we don't really distinguish here
3501 * between the runlevels 0 and 6 and just add them to the
3502 * special shutdown target. */
3503 SET_FOREACH(service, shutdown_services, j) {
3504 service = unit_follow_merge(service);
3505
3506 if (service->fragment_path)
3507 continue;
3508
3509 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3510 goto finish;
3511 }
3512
3513 r = 0;
3514
3515 finish:
3516 free(path);
3517 free(fpath);
3518 free(name);
3519
3520 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3521 set_free(runlevel_services[i]);
3522 set_free(shutdown_services);
3523
3524 if (d)
3525 closedir(d);
3526
3527 return r;
3528 }
3529 #endif
3530
3531 static void service_bus_name_owner_change(
3532 Unit *u,
3533 const char *name,
3534 const char *old_owner,
3535 const char *new_owner) {
3536
3537 Service *s = SERVICE(u);
3538
3539 assert(s);
3540 assert(name);
3541
3542 assert(streq(s->bus_name, name));
3543 assert(old_owner || new_owner);
3544
3545 if (old_owner && new_owner)
3546 log_debug_unit(u->id,
3547 "%s's D-Bus name %s changed owner from %s to %s",
3548 u->id, name, old_owner, new_owner);
3549 else if (old_owner)
3550 log_debug_unit(u->id,
3551 "%s's D-Bus name %s no longer registered by %s",
3552 u->id, name, old_owner);
3553 else
3554 log_debug_unit(u->id,
3555 "%s's D-Bus name %s now registered by %s",
3556 u->id, name, new_owner);
3557
3558 s->bus_name_good = !!new_owner;
3559
3560 if (s->type == SERVICE_DBUS) {
3561
3562 /* service_enter_running() will figure out what to
3563 * do */
3564 if (s->state == SERVICE_RUNNING)
3565 service_enter_running(s, SERVICE_SUCCESS);
3566 else if (s->state == SERVICE_START && new_owner)
3567 service_enter_start_post(s);
3568
3569 } else if (new_owner &&
3570 s->main_pid <= 0 &&
3571 (s->state == SERVICE_START ||
3572 s->state == SERVICE_START_POST ||
3573 s->state == SERVICE_RUNNING ||
3574 s->state == SERVICE_RELOAD)) {
3575
3576 /* Try to acquire PID from bus service */
3577 log_debug_unit(u->id,
3578 "Trying to acquire PID from D-Bus name...");
3579
3580 bus_query_pid(u->manager, name);
3581 }
3582 }
3583
3584 static void service_bus_query_pid_done(
3585 Unit *u,
3586 const char *name,
3587 pid_t pid) {
3588
3589 Service *s = SERVICE(u);
3590
3591 assert(s);
3592 assert(name);
3593
3594 log_debug_unit(u->id,
3595 "%s's D-Bus name %s is now owned by process %u",
3596 u->id, name, (unsigned) pid);
3597
3598 if (s->main_pid <= 0 &&
3599 (s->state == SERVICE_START ||
3600 s->state == SERVICE_START_POST ||
3601 s->state == SERVICE_RUNNING ||
3602 s->state == SERVICE_RELOAD))
3603 service_set_main_pid(s, pid);
3604 }
3605
3606 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3607
3608 assert(s);
3609 assert(fd >= 0);
3610
3611 /* This is called by the socket code when instantiating a new
3612 * service for a stream socket and the socket needs to be
3613 * configured. */
3614
3615 if (UNIT(s)->load_state != UNIT_LOADED)
3616 return -EINVAL;
3617
3618 if (s->socket_fd >= 0)
3619 return -EBUSY;
3620
3621 if (s->state != SERVICE_DEAD)
3622 return -EAGAIN;
3623
3624 s->socket_fd = fd;
3625 s->got_socket_fd = true;
3626
3627 unit_ref_set(&s->accept_socket, UNIT(sock));
3628
3629 return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3630 }
3631
3632 static void service_reset_failed(Unit *u) {
3633 Service *s = SERVICE(u);
3634
3635 assert(s);
3636
3637 if (s->state == SERVICE_FAILED)
3638 service_set_state(s, SERVICE_DEAD);
3639
3640 s->result = SERVICE_SUCCESS;
3641 s->reload_result = SERVICE_SUCCESS;
3642
3643 RATELIMIT_RESET(s->start_limit);
3644 }
3645
3646 static int service_kill(Unit *u, KillWho who, int signo, DBusError *error) {
3647 Service *s = SERVICE(u);
3648 int r = 0;
3649 Set *pid_set = NULL;
3650
3651 assert(s);
3652
3653 if (s->main_pid <= 0 && who == KILL_MAIN) {
3654 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3655 return -ESRCH;
3656 }
3657
3658 if (s->control_pid <= 0 && who == KILL_CONTROL) {
3659 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3660 return -ESRCH;
3661 }
3662
3663 if (who == KILL_CONTROL || who == KILL_ALL)
3664 if (s->control_pid > 0)
3665 if (kill(s->control_pid, signo) < 0)
3666 r = -errno;
3667
3668 if (who == KILL_MAIN || who == KILL_ALL)
3669 if (s->main_pid > 0)
3670 if (kill(s->main_pid, signo) < 0)
3671 r = -errno;
3672
3673 if (who == KILL_ALL) {
3674 int q;
3675
3676 pid_set = set_new(trivial_hash_func, trivial_compare_func);
3677 if (!pid_set)
3678 return -ENOMEM;
3679
3680 /* Exclude the control/main pid from being killed via the cgroup */
3681 if (s->control_pid > 0) {
3682 q = set_put(pid_set, LONG_TO_PTR(s->control_pid));
3683 if (q < 0) {
3684 r = q;
3685 goto finish;
3686 }
3687 }
3688
3689 if (s->main_pid > 0) {
3690 q = set_put(pid_set, LONG_TO_PTR(s->main_pid));
3691 if (q < 0) {
3692 r = q;
3693 goto finish;
3694 }
3695 }
3696
3697 q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, false, pid_set, NULL);
3698 if (q < 0 && q != -EAGAIN && q != -ESRCH && q != -ENOENT)
3699 r = q;
3700 }
3701
3702 finish:
3703 if (pid_set)
3704 set_free(pid_set);
3705
3706 return r;
3707 }
3708
3709 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3710 [SERVICE_DEAD] = "dead",
3711 [SERVICE_START_PRE] = "start-pre",
3712 [SERVICE_START] = "start",
3713 [SERVICE_START_POST] = "start-post",
3714 [SERVICE_RUNNING] = "running",
3715 [SERVICE_EXITED] = "exited",
3716 [SERVICE_RELOAD] = "reload",
3717 [SERVICE_STOP] = "stop",
3718 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3719 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3720 [SERVICE_STOP_POST] = "stop-post",
3721 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3722 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3723 [SERVICE_FAILED] = "failed",
3724 [SERVICE_AUTO_RESTART] = "auto-restart",
3725 };
3726
3727 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3728
3729 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3730 [SERVICE_RESTART_NO] = "no",
3731 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3732 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3733 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3734 [SERVICE_RESTART_ALWAYS] = "always"
3735 };
3736
3737 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3738
3739 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3740 [SERVICE_SIMPLE] = "simple",
3741 [SERVICE_FORKING] = "forking",
3742 [SERVICE_ONESHOT] = "oneshot",
3743 [SERVICE_DBUS] = "dbus",
3744 [SERVICE_NOTIFY] = "notify",
3745 [SERVICE_IDLE] = "idle"
3746 };
3747
3748 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3749
3750 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3751 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3752 [SERVICE_EXEC_START] = "ExecStart",
3753 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3754 [SERVICE_EXEC_RELOAD] = "ExecReload",
3755 [SERVICE_EXEC_STOP] = "ExecStop",
3756 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3757 };
3758
3759 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3760
3761 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3762 [NOTIFY_NONE] = "none",
3763 [NOTIFY_MAIN] = "main",
3764 [NOTIFY_ALL] = "all"
3765 };
3766
3767 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3768
3769 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3770 [SERVICE_SUCCESS] = "success",
3771 [SERVICE_FAILURE_RESOURCES] = "resources",
3772 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3773 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3774 [SERVICE_FAILURE_SIGNAL] = "signal",
3775 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3776 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3777 [SERVICE_FAILURE_START_LIMIT] = "start-limit"
3778 };
3779
3780 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3781
3782 static const char* const start_limit_action_table[_SERVICE_START_LIMIT_MAX] = {
3783 [SERVICE_START_LIMIT_NONE] = "none",
3784 [SERVICE_START_LIMIT_REBOOT] = "reboot",
3785 [SERVICE_START_LIMIT_REBOOT_FORCE] = "reboot-force",
3786 [SERVICE_START_LIMIT_REBOOT_IMMEDIATE] = "reboot-immediate"
3787 };
3788 DEFINE_STRING_TABLE_LOOKUP(start_limit_action, StartLimitAction);
3789
3790 const UnitVTable service_vtable = {
3791 .object_size = sizeof(Service),
3792
3793 .sections =
3794 "Unit\0"
3795 "Service\0"
3796 "Install\0",
3797
3798 .exec_context_offset = offsetof(Service, exec_context),
3799 .exec_section = "Service",
3800
3801 .init = service_init,
3802 .done = service_done,
3803 .load = service_load,
3804
3805 .coldplug = service_coldplug,
3806
3807 .dump = service_dump,
3808
3809 .start = service_start,
3810 .stop = service_stop,
3811 .reload = service_reload,
3812
3813 .can_reload = service_can_reload,
3814
3815 .kill = service_kill,
3816
3817 .serialize = service_serialize,
3818 .deserialize_item = service_deserialize_item,
3819
3820 .active_state = service_active_state,
3821 .sub_state_to_string = service_sub_state_to_string,
3822
3823 .check_gc = service_check_gc,
3824 .check_snapshot = service_check_snapshot,
3825
3826 .sigchld_event = service_sigchld_event,
3827 .timer_event = service_timer_event,
3828 .fd_event = service_fd_event,
3829
3830 .reset_failed = service_reset_failed,
3831
3832 .cgroup_notify_empty = service_cgroup_notify_event,
3833 .notify_message = service_notify_message,
3834
3835 .bus_name_owner_change = service_bus_name_owner_change,
3836 .bus_query_pid_done = service_bus_query_pid_done,
3837
3838 .bus_interface = "org.freedesktop.systemd1.Service",
3839 .bus_message_handler = bus_service_message_handler,
3840 .bus_invalidating_properties = bus_service_invalidating_properties,
3841
3842 #ifdef HAVE_SYSV_COMPAT
3843 .enumerate = service_enumerate,
3844 #endif
3845 .status_message_formats = {
3846 .starting_stopping = {
3847 [0] = "Starting %s...",
3848 [1] = "Stopping %s...",
3849 },
3850 .finished_start_job = {
3851 [JOB_DONE] = "Started %s.",
3852 [JOB_FAILED] = "Failed to start %s.",
3853 [JOB_DEPENDENCY] = "Dependency failed for %s.",
3854 [JOB_TIMEOUT] = "Timed out starting %s.",
3855 },
3856 .finished_stop_job = {
3857 [JOB_DONE] = "Stopped %s.",
3858 [JOB_FAILED] = "Stopped (with error) %s.",
3859 [JOB_TIMEOUT] = "Timed out stopping %s.",
3860 },
3861 },
3862 };
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