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execute: make sending of SIGKILL on shutdown optional
[thirdparty/systemd.git] / src / 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 General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include <errno.h>
23 #include <signal.h>
24 #include <dirent.h>
25 #include <unistd.h>
26
27 #include "unit.h"
28 #include "service.h"
29 #include "load-fragment.h"
30 #include "load-dropin.h"
31 #include "log.h"
32 #include "strv.h"
33 #include "unit-name.h"
34 #include "dbus-service.h"
35 #include "special.h"
36 #include "bus-errors.h"
37
38 #define COMMENTS "#;\n"
39 #define NEWLINES "\n\r"
40
41 #ifdef HAVE_SYSV_COMPAT
42
43 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
44
45 typedef enum RunlevelType {
46 RUNLEVEL_UP,
47 RUNLEVEL_DOWN,
48 RUNLEVEL_SYSINIT
49 } RunlevelType;
50
51 static const struct {
52 const char *path;
53 const char *target;
54 const RunlevelType type;
55 } rcnd_table[] = {
56 /* Standard SysV runlevels for start-up */
57 { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP },
58 { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
59 { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
60 { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
61 { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
62
63 #ifdef TARGET_SUSE
64 /* SUSE style boot.d */
65 { "boot.d", SPECIAL_SYSINIT_TARGET, RUNLEVEL_SYSINIT },
66 #endif
67
68 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_FRUGALWARE)
69 /* Debian style rcS.d */
70 { "rcS.d", SPECIAL_SYSINIT_TARGET, RUNLEVEL_SYSINIT },
71 #endif
72
73 /* Standard SysV runlevels for shutdown */
74 { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN },
75 { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }
76
77 /* Note that the order here matters, as we read the
78 directories in this order, and we want to make sure that
79 sysv_start_priority is known when we first load the
80 unit. And that value we only know from S links. Hence
81 UP/SYSINIT must be read before DOWN */
82 };
83
84 #define RUNLEVELS_UP "12345"
85 /* #define RUNLEVELS_DOWN "06" */
86 /* #define RUNLEVELS_BOOT "bBsS" */
87 #endif
88
89 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
90 [SERVICE_DEAD] = UNIT_INACTIVE,
91 [SERVICE_START_PRE] = UNIT_ACTIVATING,
92 [SERVICE_START] = UNIT_ACTIVATING,
93 [SERVICE_START_POST] = UNIT_ACTIVATING,
94 [SERVICE_RUNNING] = UNIT_ACTIVE,
95 [SERVICE_EXITED] = UNIT_ACTIVE,
96 [SERVICE_RELOAD] = UNIT_RELOADING,
97 [SERVICE_STOP] = UNIT_DEACTIVATING,
98 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
99 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
100 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
101 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
102 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
103 [SERVICE_FAILED] = UNIT_FAILED,
104 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
105 };
106
107 static void service_init(Unit *u) {
108 Service *s = SERVICE(u);
109
110 assert(u);
111 assert(u->meta.load_state == UNIT_STUB);
112
113 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
114 s->restart_usec = DEFAULT_RESTART_USEC;
115 s->timer_watch.type = WATCH_INVALID;
116 #ifdef HAVE_SYSV_COMPAT
117 s->sysv_start_priority = -1;
118 #endif
119 s->socket_fd = -1;
120
121 exec_context_init(&s->exec_context);
122
123 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
124
125 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
126 }
127
128 static void service_unwatch_control_pid(Service *s) {
129 assert(s);
130
131 if (s->control_pid <= 0)
132 return;
133
134 unit_unwatch_pid(UNIT(s), s->control_pid);
135 s->control_pid = 0;
136 }
137
138 static void service_unwatch_main_pid(Service *s) {
139 assert(s);
140
141 if (s->main_pid <= 0)
142 return;
143
144 unit_unwatch_pid(UNIT(s), s->main_pid);
145 s->main_pid = 0;
146 }
147
148 static int service_set_main_pid(Service *s, pid_t pid) {
149 pid_t ppid;
150
151 assert(s);
152
153 if (pid <= 1)
154 return -EINVAL;
155
156 if (pid == getpid())
157 return -EINVAL;
158
159 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
160 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
161 s->meta.id, (unsigned long) pid);
162
163 s->main_pid = pid;
164 s->main_pid_known = true;
165
166 exec_status_start(&s->main_exec_status, pid);
167
168 return 0;
169 }
170
171 static void service_close_socket_fd(Service *s) {
172 assert(s);
173
174 if (s->socket_fd < 0)
175 return;
176
177 close_nointr_nofail(s->socket_fd);
178 s->socket_fd = -1;
179 }
180
181 static void service_connection_unref(Service *s) {
182 assert(s);
183
184 if (!s->accept_socket)
185 return;
186
187 socket_connection_unref(s->accept_socket);
188 s->accept_socket = NULL;
189 }
190
191 static void service_done(Unit *u) {
192 Service *s = SERVICE(u);
193
194 assert(s);
195
196 free(s->pid_file);
197 s->pid_file = NULL;
198
199 #ifdef HAVE_SYSV_COMPAT
200 free(s->sysv_path);
201 s->sysv_path = NULL;
202
203 free(s->sysv_runlevels);
204 s->sysv_runlevels = NULL;
205 #endif
206
207 free(s->status_text);
208 s->status_text = NULL;
209
210 exec_context_done(&s->exec_context);
211 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
212 s->control_command = NULL;
213
214 /* This will leak a process, but at least no memory or any of
215 * our resources */
216 service_unwatch_main_pid(s);
217 service_unwatch_control_pid(s);
218
219 if (s->bus_name) {
220 unit_unwatch_bus_name(UNIT(u), s->bus_name);
221 free(s->bus_name);
222 s->bus_name = NULL;
223 }
224
225 service_close_socket_fd(s);
226 service_connection_unref(s);
227
228 set_free(s->configured_sockets);
229
230 unit_unwatch_timer(u, &s->timer_watch);
231 }
232
233 #ifdef HAVE_SYSV_COMPAT
234 static char *sysv_translate_name(const char *name) {
235 char *r;
236
237 if (!(r = new(char, strlen(name) + sizeof(".service"))))
238 return NULL;
239
240 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
241 if (endswith(name, ".sh"))
242 /* Drop Debian-style .sh suffix */
243 strcpy(stpcpy(r, name) - 3, ".service");
244 #endif
245 #ifdef TARGET_SUSE
246 if (startswith(name, "boot."))
247 /* Drop SuSE-style boot. prefix */
248 strcpy(stpcpy(r, name + 5), ".service");
249 #endif
250 #ifdef TARGET_FRUGALWARE
251 if (startswith(name, "rc."))
252 /* Drop Frugalware-style rc. prefix */
253 strcpy(stpcpy(r, name + 3), ".service");
254 #endif
255 else
256 /* Normal init scripts */
257 strcpy(stpcpy(r, name), ".service");
258
259 return r;
260 }
261
262 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
263
264 /* We silently ignore the $ prefix here. According to the LSB
265 * spec it simply indicates whether something is a
266 * standardized name or a distribution-specific one. Since we
267 * just follow what already exists and do not introduce new
268 * uses or names we don't care who introduced a new name. */
269
270 static const char * const table[] = {
271 /* LSB defined facilities */
272 "local_fs", SPECIAL_LOCAL_FS_TARGET,
273 "network", SPECIAL_NETWORK_TARGET,
274 "named", SPECIAL_NSS_LOOKUP_TARGET,
275 "portmap", SPECIAL_RPCBIND_TARGET,
276 "remote_fs", SPECIAL_REMOTE_FS_TARGET,
277 "syslog", SPECIAL_SYSLOG_TARGET,
278 "time", SPECIAL_RTC_SET_TARGET,
279
280 /* common extensions */
281 "mail-transfer-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
282 "x-display-manager", SPECIAL_DISPLAY_MANAGER_SERVICE,
283 "null", NULL,
284
285 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
286 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
287 #endif
288
289 #ifdef TARGET_FEDORA
290 "MTA", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
291 "smtpdaemon", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
292 "httpd", SPECIAL_HTTP_DAEMON_TARGET,
293 #endif
294
295 #ifdef TARGET_SUSE
296 "smtp", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
297 #endif
298 };
299
300 unsigned i;
301 char *r;
302 const char *n;
303
304 assert(name);
305 assert(_r);
306
307 n = *name == '$' ? name + 1 : name;
308
309 for (i = 0; i < ELEMENTSOF(table); i += 2) {
310
311 if (!streq(table[i], n))
312 continue;
313
314 if (!table[i+1])
315 return 0;
316
317 if (!(r = strdup(table[i+1])))
318 return -ENOMEM;
319
320 goto finish;
321 }
322
323 /* If we don't know this name, fallback heuristics to figure
324 * out whether something is a target or a service alias. */
325
326 if (*name == '$') {
327 if (!unit_prefix_is_valid(n))
328 return -EINVAL;
329
330 /* Facilities starting with $ are most likely targets */
331 r = unit_name_build(n, NULL, ".target");
332 } else if (filename && streq(name, filename))
333 /* Names equalling the file name of the services are redundant */
334 return 0;
335 else
336 /* Everything else we assume to be normal service names */
337 r = sysv_translate_name(n);
338
339 if (!r)
340 return -ENOMEM;
341
342 finish:
343
344 if (_r)
345 *_r = r;
346
347 return 1;
348 }
349
350 static int sysv_fix_order(Service *s) {
351 Meta *other;
352 int r;
353
354 assert(s);
355
356 if (s->sysv_start_priority < 0)
357 return 0;
358
359 /* For each pair of services where at least one lacks a LSB
360 * header, we use the start priority value to order things. */
361
362 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
363 Service *t;
364 UnitDependency d;
365 bool special_s, special_t;
366
367 t = (Service*) other;
368
369 if (s == t)
370 continue;
371
372 if (t->meta.load_state != UNIT_LOADED)
373 continue;
374
375 if (t->sysv_start_priority < 0)
376 continue;
377
378 /* If both units have modern headers we don't care
379 * about the priorities */
380 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
381 (t->meta.fragment_path || t->sysv_has_lsb))
382 continue;
383
384 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
385 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
386
387 if (special_t && !special_s)
388 d = UNIT_AFTER;
389 else if (special_s && !special_t)
390 d = UNIT_BEFORE;
391 else if (t->sysv_start_priority < s->sysv_start_priority)
392 d = UNIT_AFTER;
393 else if (t->sysv_start_priority > s->sysv_start_priority)
394 d = UNIT_BEFORE;
395 else
396 continue;
397
398 /* FIXME: Maybe we should compare the name here lexicographically? */
399
400 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
401 return r;
402 }
403
404 return 0;
405 }
406
407 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
408 ExecCommand *c;
409
410 if (!(c = new0(ExecCommand, 1)))
411 return NULL;
412
413 if (!(c->path = strdup(path))) {
414 free(c);
415 return NULL;
416 }
417
418 if (!(c->argv = strv_new(path, arg1, NULL))) {
419 free(c->path);
420 free(c);
421 return NULL;
422 }
423
424 return c;
425 }
426
427 static int sysv_exec_commands(Service *s) {
428 ExecCommand *c;
429
430 assert(s);
431 assert(s->sysv_path);
432
433 if (!(c = exec_command_new(s->sysv_path, "start")))
434 return -ENOMEM;
435 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
436
437 if (!(c = exec_command_new(s->sysv_path, "stop")))
438 return -ENOMEM;
439 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
440
441 if (!(c = exec_command_new(s->sysv_path, "reload")))
442 return -ENOMEM;
443 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
444
445 return 0;
446 }
447
448 static int service_load_sysv_path(Service *s, const char *path) {
449 FILE *f;
450 Unit *u;
451 unsigned line = 0;
452 int r;
453 enum {
454 NORMAL,
455 DESCRIPTION,
456 LSB,
457 LSB_DESCRIPTION
458 } state = NORMAL;
459 char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
460
461 assert(s);
462 assert(path);
463
464 u = UNIT(s);
465
466 if (!(f = fopen(path, "re"))) {
467 r = errno == ENOENT ? 0 : -errno;
468 goto finish;
469 }
470
471 free(s->sysv_path);
472 if (!(s->sysv_path = strdup(path))) {
473 r = -ENOMEM;
474 goto finish;
475 }
476
477 while (!feof(f)) {
478 char l[LINE_MAX], *t;
479
480 if (!fgets(l, sizeof(l), f)) {
481 if (feof(f))
482 break;
483
484 r = -errno;
485 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
486 goto finish;
487 }
488
489 line++;
490
491 t = strstrip(l);
492 if (*t != '#')
493 continue;
494
495 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
496 state = LSB;
497 s->sysv_has_lsb = true;
498 continue;
499 }
500
501 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
502 state = NORMAL;
503 continue;
504 }
505
506 t++;
507 t += strspn(t, WHITESPACE);
508
509 if (state == NORMAL) {
510
511 /* Try to parse Red Hat style chkconfig headers */
512
513 if (startswith_no_case(t, "chkconfig:")) {
514 int start_priority;
515 char runlevels[16], *k;
516
517 state = NORMAL;
518
519 if (sscanf(t+10, "%15s %i %*i",
520 runlevels,
521 &start_priority) != 2) {
522
523 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
524 continue;
525 }
526
527 /* A start priority gathered from the
528 * symlink farms is preferred over the
529 * data from the LSB header. */
530 if (start_priority < 0 || start_priority > 99)
531 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
532 else if (s->sysv_start_priority < 0)
533 s->sysv_start_priority = start_priority;
534
535 char_array_0(runlevels);
536 k = delete_chars(runlevels, WHITESPACE "-");
537
538 if (k[0]) {
539 char *d;
540
541 if (!(d = strdup(k))) {
542 r = -ENOMEM;
543 goto finish;
544 }
545
546 free(s->sysv_runlevels);
547 s->sysv_runlevels = d;
548 }
549
550 } else if (startswith_no_case(t, "description:")) {
551
552 size_t k = strlen(t);
553 char *d;
554 const char *j;
555
556 if (t[k-1] == '\\') {
557 state = DESCRIPTION;
558 t[k-1] = 0;
559 }
560
561 if ((j = strstrip(t+12)) && *j) {
562 if (!(d = strdup(j))) {
563 r = -ENOMEM;
564 goto finish;
565 }
566 } else
567 d = NULL;
568
569 free(chkconfig_description);
570 chkconfig_description = d;
571
572 } else if (startswith_no_case(t, "pidfile:")) {
573
574 char *fn;
575
576 state = NORMAL;
577
578 fn = strstrip(t+8);
579 if (!path_is_absolute(fn)) {
580 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
581 continue;
582 }
583
584 if (!(fn = strdup(fn))) {
585 r = -ENOMEM;
586 goto finish;
587 }
588
589 free(s->pid_file);
590 s->pid_file = fn;
591 }
592
593 } else if (state == DESCRIPTION) {
594
595 /* Try to parse Red Hat style description
596 * continuation */
597
598 size_t k = strlen(t);
599 char *j;
600
601 if (t[k-1] == '\\')
602 t[k-1] = 0;
603 else
604 state = NORMAL;
605
606 if ((j = strstrip(t)) && *j) {
607 char *d = NULL;
608
609 if (chkconfig_description)
610 asprintf(&d, "%s %s", chkconfig_description, j);
611 else
612 d = strdup(j);
613
614 if (!d) {
615 r = -ENOMEM;
616 goto finish;
617 }
618
619 free(chkconfig_description);
620 chkconfig_description = d;
621 }
622
623 } else if (state == LSB || state == LSB_DESCRIPTION) {
624
625 if (startswith_no_case(t, "Provides:")) {
626 char *i, *w;
627 size_t z;
628
629 state = LSB;
630
631 FOREACH_WORD_QUOTED(w, z, t+9, i) {
632 char *n, *m;
633
634 if (!(n = strndup(w, z))) {
635 r = -ENOMEM;
636 goto finish;
637 }
638
639 r = sysv_translate_facility(n, file_name_from_path(path), &m);
640 free(n);
641
642 if (r < 0)
643 goto finish;
644
645 if (r == 0)
646 continue;
647
648 if (unit_name_to_type(m) == UNIT_SERVICE)
649 r = unit_add_name(u, m);
650 else {
651 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
652
653 if (s->sysv_enabled) {
654 int k;
655
656 if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
657 r = k;
658 }
659 }
660
661 if (r < 0)
662 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
663
664 free(m);
665 }
666
667 } else if (startswith_no_case(t, "Required-Start:") ||
668 startswith_no_case(t, "Should-Start:") ||
669 startswith_no_case(t, "X-Start-Before:") ||
670 startswith_no_case(t, "X-Start-After:")) {
671 char *i, *w;
672 size_t z;
673
674 state = LSB;
675
676 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
677 char *n, *m;
678
679 if (!(n = strndup(w, z))) {
680 r = -ENOMEM;
681 goto finish;
682 }
683
684 r = sysv_translate_facility(n, file_name_from_path(path), &m);
685
686 if (r < 0) {
687 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
688 free(n);
689 continue;
690 }
691
692 free(n);
693
694 if (r == 0)
695 continue;
696
697 r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
698
699 if (r < 0)
700 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
701
702 free(m);
703 }
704 } else if (startswith_no_case(t, "Default-Start:")) {
705 char *k, *d;
706
707 state = LSB;
708
709 k = delete_chars(t+14, WHITESPACE "-");
710
711 if (k[0] != 0) {
712 if (!(d = strdup(k))) {
713 r = -ENOMEM;
714 goto finish;
715 }
716
717 free(s->sysv_runlevels);
718 s->sysv_runlevels = d;
719 }
720
721 } else if (startswith_no_case(t, "Description:")) {
722 char *d, *j;
723
724 state = LSB_DESCRIPTION;
725
726 if ((j = strstrip(t+12)) && *j) {
727 if (!(d = strdup(j))) {
728 r = -ENOMEM;
729 goto finish;
730 }
731 } else
732 d = NULL;
733
734 free(long_description);
735 long_description = d;
736
737 } else if (startswith_no_case(t, "Short-Description:")) {
738 char *d, *j;
739
740 state = LSB;
741
742 if ((j = strstrip(t+18)) && *j) {
743 if (!(d = strdup(j))) {
744 r = -ENOMEM;
745 goto finish;
746 }
747 } else
748 d = NULL;
749
750 free(short_description);
751 short_description = d;
752
753 } else if (startswith_no_case(t, "X-Interactive:")) {
754 int b;
755
756 if ((b = parse_boolean(strstrip(t+14))) < 0) {
757 log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
758 continue;
759 }
760
761 if (b)
762 s->exec_context.std_input = EXEC_INPUT_TTY;
763 else
764 s->exec_context.std_input = EXEC_INPUT_NULL;
765
766 } else if (state == LSB_DESCRIPTION) {
767
768 if (startswith(l, "#\t") || startswith(l, "# ")) {
769 char *j;
770
771 if ((j = strstrip(t)) && *j) {
772 char *d = NULL;
773
774 if (long_description)
775 asprintf(&d, "%s %s", long_description, t);
776 else
777 d = strdup(j);
778
779 if (!d) {
780 r = -ENOMEM;
781 goto finish;
782 }
783
784 free(long_description);
785 long_description = d;
786 }
787
788 } else
789 state = LSB;
790 }
791 }
792 }
793
794 if ((r = sysv_exec_commands(s)) < 0)
795 goto finish;
796
797 if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
798 /* If there a runlevels configured for this service
799 * but none of the standard ones, then we assume this
800 * is some special kind of service (which might be
801 * needed for early boot) and don't create any links
802 * to it. */
803
804 s->meta.default_dependencies = false;
805
806 /* Don't timeout special services during boot (like fsck) */
807 s->timeout_usec = 0;
808 } else
809 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
810
811 /* Special setting for all SysV services */
812 s->type = SERVICE_FORKING;
813 s->remain_after_exit = true;
814 s->restart = SERVICE_RESTART_NO;
815 s->exec_context.std_output =
816 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
817 ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL;
818 s->exec_context.kill_mode = KILL_PROCESS_GROUP;
819
820 /* We use the long description only if
821 * no short description is set. */
822
823 if (short_description)
824 description = short_description;
825 else if (chkconfig_description)
826 description = chkconfig_description;
827 else if (long_description)
828 description = long_description;
829 else
830 description = NULL;
831
832 if (description) {
833 char *d;
834
835 if (!(d = strappend("LSB: ", description))) {
836 r = -ENOMEM;
837 goto finish;
838 }
839
840 u->meta.description = d;
841 }
842
843 u->meta.load_state = UNIT_LOADED;
844 r = 0;
845
846 finish:
847
848 if (f)
849 fclose(f);
850
851 free(short_description);
852 free(long_description);
853 free(chkconfig_description);
854
855 return r;
856 }
857
858 static int service_load_sysv_name(Service *s, const char *name) {
859 char **p;
860
861 assert(s);
862 assert(name);
863
864 /* For SysV services we strip the boot.*, rc.* and *.sh
865 * prefixes/suffixes. */
866 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
867 if (endswith(name, ".sh.service"))
868 return -ENOENT;
869 #endif
870
871 #ifdef TARGET_SUSE
872 if (startswith(name, "boot."))
873 return -ENOENT;
874 #endif
875
876 #ifdef TARGET_FRUGALWARE
877 if (startswith(name, "rc."))
878 return -ENOENT;
879 #endif
880
881 STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
882 char *path;
883 int r;
884
885 if (asprintf(&path, "%s/%s", *p, name) < 0)
886 return -ENOMEM;
887
888 assert(endswith(path, ".service"));
889 path[strlen(path)-8] = 0;
890
891 r = service_load_sysv_path(s, path);
892
893 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
894 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
895 /* Try Debian style *.sh source'able init scripts */
896 strcat(path, ".sh");
897 r = service_load_sysv_path(s, path);
898 }
899 #endif
900 free(path);
901
902 #ifdef TARGET_SUSE
903 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
904 /* Try SUSE style boot.* init scripts */
905
906 if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
907 return -ENOMEM;
908
909 /* Drop .service suffix */
910 path[strlen(path)-8] = 0;
911 r = service_load_sysv_path(s, path);
912 free(path);
913 }
914 #endif
915
916 #ifdef TARGET_FRUGALWARE
917 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
918 /* Try Frugalware style rc.* init scripts */
919
920 if (asprintf(&path, "%s/rc.%s", *p, name) < 0)
921 return -ENOMEM;
922
923 /* Drop .service suffix */
924 path[strlen(path)-8] = 0;
925 r = service_load_sysv_path(s, path);
926 free(path);
927 }
928 #endif
929
930 if (r < 0)
931 return r;
932
933 if ((s->meta.load_state != UNIT_STUB))
934 break;
935 }
936
937 return 0;
938 }
939
940 static int service_load_sysv(Service *s) {
941 const char *t;
942 Iterator i;
943 int r;
944
945 assert(s);
946
947 /* Load service data from SysV init scripts, preferably with
948 * LSB headers ... */
949
950 if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
951 return 0;
952
953 if ((t = s->meta.id))
954 if ((r = service_load_sysv_name(s, t)) < 0)
955 return r;
956
957 if (s->meta.load_state == UNIT_STUB)
958 SET_FOREACH(t, s->meta.names, i) {
959 if (t == s->meta.id)
960 continue;
961
962 if ((r = service_load_sysv_name(s, t)) < 0)
963 return r;
964
965 if (s->meta.load_state != UNIT_STUB)
966 break;
967 }
968
969 return 0;
970 }
971 #endif
972
973 static int fsck_fix_order(Service *s) {
974 Meta *other;
975 int r;
976
977 assert(s);
978
979 if (s->fsck_passno <= 0)
980 return 0;
981
982 /* For each pair of services where both have an fsck priority
983 * we order things based on it. */
984
985 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
986 Service *t;
987 UnitDependency d;
988
989 t = (Service*) other;
990
991 if (s == t)
992 continue;
993
994 if (t->meta.load_state != UNIT_LOADED)
995 continue;
996
997 if (t->fsck_passno <= 0)
998 continue;
999
1000 if (t->fsck_passno < s->fsck_passno)
1001 d = UNIT_AFTER;
1002 else if (t->fsck_passno > s->fsck_passno)
1003 d = UNIT_BEFORE;
1004 else
1005 continue;
1006
1007 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1008 return r;
1009 }
1010
1011 return 0;
1012 }
1013
1014 static int service_verify(Service *s) {
1015 assert(s);
1016
1017 if (s->meta.load_state != UNIT_LOADED)
1018 return 0;
1019
1020 if (!s->exec_command[SERVICE_EXEC_START]) {
1021 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1022 return -EINVAL;
1023 }
1024
1025 if (s->type != SERVICE_ONESHOT &&
1026 s->exec_command[SERVICE_EXEC_START]->command_next) {
1027 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1028 return -EINVAL;
1029 }
1030
1031 if (s->type == SERVICE_DBUS && !s->bus_name) {
1032 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1033 return -EINVAL;
1034 }
1035
1036 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1037 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1038 return -EINVAL;
1039 }
1040
1041 return 0;
1042 }
1043
1044 static int service_add_default_dependencies(Service *s) {
1045 int r;
1046
1047 assert(s);
1048
1049 /* Add a number of automatic dependencies useful for the
1050 * majority of services. */
1051
1052 /* First, pull in base system */
1053 if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1054
1055 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1056 return r;
1057
1058 } else if (s->meta.manager->running_as == MANAGER_USER) {
1059
1060 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1061 return r;
1062 }
1063
1064 /* Second, activate normal shutdown */
1065 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1066 }
1067
1068 static int service_load(Unit *u) {
1069 int r;
1070 Service *s = SERVICE(u);
1071
1072 assert(s);
1073
1074 /* Load a .service file */
1075 if ((r = unit_load_fragment(u)) < 0)
1076 return r;
1077
1078 #ifdef HAVE_SYSV_COMPAT
1079 /* Load a classic init script as a fallback, if we couldn't find anything */
1080 if (u->meta.load_state == UNIT_STUB)
1081 if ((r = service_load_sysv(s)) < 0)
1082 return r;
1083 #endif
1084
1085 /* Still nothing found? Then let's give up */
1086 if (u->meta.load_state == UNIT_STUB)
1087 return -ENOENT;
1088
1089 /* We were able to load something, then let's add in the
1090 * dropin directories. */
1091 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1092 return r;
1093
1094 /* This is a new unit? Then let's add in some extras */
1095 if (u->meta.load_state == UNIT_LOADED) {
1096 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1097 return r;
1098
1099 if ((r = unit_add_default_cgroups(u)) < 0)
1100 return r;
1101
1102 #ifdef HAVE_SYSV_COMPAT
1103 if ((r = sysv_fix_order(s)) < 0)
1104 return r;
1105 #endif
1106
1107 if ((r = fsck_fix_order(s)) < 0)
1108 return r;
1109
1110 if (s->bus_name)
1111 if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1112 return r;
1113
1114 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1115 s->notify_access = NOTIFY_MAIN;
1116
1117 if (s->type == SERVICE_DBUS || s->bus_name)
1118 if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1119 return r;
1120
1121 if (s->meta.default_dependencies)
1122 if ((r = service_add_default_dependencies(s)) < 0)
1123 return r;
1124 }
1125
1126 return service_verify(s);
1127 }
1128
1129 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1130
1131 ServiceExecCommand c;
1132 Service *s = SERVICE(u);
1133 const char *prefix2;
1134 char *p2;
1135
1136 assert(s);
1137
1138 p2 = strappend(prefix, "\t");
1139 prefix2 = p2 ? p2 : prefix;
1140
1141 fprintf(f,
1142 "%sService State: %s\n"
1143 "%sPermissionsStartOnly: %s\n"
1144 "%sRootDirectoryStartOnly: %s\n"
1145 "%sRemainAfterExit: %s\n"
1146 "%sType: %s\n"
1147 "%sRestart: %s\n"
1148 "%sNotifyAccess: %s\n",
1149 prefix, service_state_to_string(s->state),
1150 prefix, yes_no(s->permissions_start_only),
1151 prefix, yes_no(s->root_directory_start_only),
1152 prefix, yes_no(s->remain_after_exit),
1153 prefix, service_type_to_string(s->type),
1154 prefix, service_restart_to_string(s->restart),
1155 prefix, notify_access_to_string(s->notify_access));
1156
1157 if (s->control_pid > 0)
1158 fprintf(f,
1159 "%sControl PID: %lu\n",
1160 prefix, (unsigned long) s->control_pid);
1161
1162 if (s->main_pid > 0)
1163 fprintf(f,
1164 "%sMain PID: %lu\n",
1165 prefix, (unsigned long) s->main_pid);
1166
1167 if (s->pid_file)
1168 fprintf(f,
1169 "%sPIDFile: %s\n",
1170 prefix, s->pid_file);
1171
1172 if (s->bus_name)
1173 fprintf(f,
1174 "%sBusName: %s\n"
1175 "%sBus Name Good: %s\n",
1176 prefix, s->bus_name,
1177 prefix, yes_no(s->bus_name_good));
1178
1179 exec_context_dump(&s->exec_context, f, prefix);
1180
1181 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1182
1183 if (!s->exec_command[c])
1184 continue;
1185
1186 fprintf(f, "%s-> %s:\n",
1187 prefix, service_exec_command_to_string(c));
1188
1189 exec_command_dump_list(s->exec_command[c], f, prefix2);
1190 }
1191
1192 #ifdef HAVE_SYSV_COMPAT
1193 if (s->sysv_path)
1194 fprintf(f,
1195 "%sSysV Init Script Path: %s\n"
1196 "%sSysV Init Script has LSB Header: %s\n"
1197 "%sSysVEnabled: %s\n",
1198 prefix, s->sysv_path,
1199 prefix, yes_no(s->sysv_has_lsb),
1200 prefix, yes_no(s->sysv_enabled));
1201
1202 if (s->sysv_start_priority >= 0)
1203 fprintf(f,
1204 "%sSysVStartPriority: %i\n",
1205 prefix, s->sysv_start_priority);
1206
1207 if (s->sysv_runlevels)
1208 fprintf(f, "%sSysVRunLevels: %s\n",
1209 prefix, s->sysv_runlevels);
1210 #endif
1211
1212 if (s->fsck_passno > 0)
1213 fprintf(f,
1214 "%sFsckPassNo: %i\n",
1215 prefix, s->fsck_passno);
1216
1217 if (s->status_text)
1218 fprintf(f, "%sStatus Text: %s\n",
1219 prefix, s->status_text);
1220
1221 free(p2);
1222 }
1223
1224 static int service_load_pid_file(Service *s) {
1225 char *k;
1226 int r;
1227 pid_t pid;
1228
1229 assert(s);
1230
1231 if (s->main_pid_known)
1232 return 0;
1233
1234 assert(s->main_pid <= 0);
1235
1236 if (!s->pid_file)
1237 return -ENOENT;
1238
1239 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1240 return r;
1241
1242 r = parse_pid(k, &pid);
1243 free(k);
1244
1245 if (r < 0)
1246 return r;
1247
1248 if (kill(pid, 0) < 0 && errno != EPERM) {
1249 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1250 (unsigned long) pid, s->pid_file);
1251 return -ESRCH;
1252 }
1253
1254 if ((r = service_set_main_pid(s, pid)) < 0)
1255 return r;
1256
1257 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1258 /* FIXME: we need to do something here */
1259 return r;
1260
1261 return 0;
1262 }
1263
1264 static int service_search_main_pid(Service *s) {
1265 pid_t pid;
1266 int r;
1267
1268 assert(s);
1269
1270 if (s->main_pid_known)
1271 return 0;
1272
1273 assert(s->main_pid <= 0);
1274
1275 if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1276 return -ENOENT;
1277
1278 if ((r = service_set_main_pid(s, pid)) < 0)
1279 return r;
1280
1281 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1282 /* FIXME: we need to do something here */
1283 return r;
1284
1285 return 0;
1286 }
1287
1288 static int service_get_sockets(Service *s, Set **_set) {
1289 Set *set;
1290 Iterator i;
1291 char *t;
1292 int r;
1293
1294 assert(s);
1295 assert(_set);
1296
1297 if (s->socket_fd >= 0)
1298 return 0;
1299
1300 if (!set_isempty(s->configured_sockets))
1301 return 0;
1302
1303 /* Collects all Socket objects that belong to this
1304 * service. Note that a service might have multiple sockets
1305 * via multiple names. */
1306
1307 if (!(set = set_new(NULL, NULL)))
1308 return -ENOMEM;
1309
1310 SET_FOREACH(t, s->meta.names, i) {
1311 char *k;
1312 Unit *p;
1313
1314 /* Look for all socket objects that go by any of our
1315 * units and collect their fds */
1316
1317 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1318 r = -ENOMEM;
1319 goto fail;
1320 }
1321
1322 p = manager_get_unit(s->meta.manager, k);
1323 free(k);
1324
1325 if (!p)
1326 continue;
1327
1328 if ((r = set_put(set, p)) < 0)
1329 goto fail;
1330 }
1331
1332 *_set = set;
1333 return 0;
1334
1335 fail:
1336 set_free(set);
1337 return r;
1338 }
1339
1340 static int service_notify_sockets_dead(Service *s) {
1341 Iterator i;
1342 Set *set, *free_set = NULL;
1343 Socket *sock;
1344 int r;
1345
1346 assert(s);
1347
1348 /* Notifies all our sockets when we die */
1349
1350 if (s->socket_fd >= 0)
1351 return 0;
1352
1353 if (!set_isempty(s->configured_sockets))
1354 set = s->configured_sockets;
1355 else {
1356 if ((r = service_get_sockets(s, &free_set)) < 0)
1357 return r;
1358
1359 set = free_set;
1360 }
1361
1362 SET_FOREACH(sock, set, i)
1363 socket_notify_service_dead(sock);
1364
1365 set_free(free_set);
1366
1367 return 0;
1368 }
1369
1370 static void service_set_state(Service *s, ServiceState state) {
1371 ServiceState old_state;
1372 assert(s);
1373
1374 old_state = s->state;
1375 s->state = state;
1376
1377 if (state != SERVICE_START_PRE &&
1378 state != SERVICE_START &&
1379 state != SERVICE_START_POST &&
1380 state != SERVICE_RELOAD &&
1381 state != SERVICE_STOP &&
1382 state != SERVICE_STOP_SIGTERM &&
1383 state != SERVICE_STOP_SIGKILL &&
1384 state != SERVICE_STOP_POST &&
1385 state != SERVICE_FINAL_SIGTERM &&
1386 state != SERVICE_FINAL_SIGKILL &&
1387 state != SERVICE_AUTO_RESTART)
1388 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1389
1390 if (state != SERVICE_START &&
1391 state != SERVICE_START_POST &&
1392 state != SERVICE_RUNNING &&
1393 state != SERVICE_RELOAD &&
1394 state != SERVICE_STOP &&
1395 state != SERVICE_STOP_SIGTERM &&
1396 state != SERVICE_STOP_SIGKILL)
1397 service_unwatch_main_pid(s);
1398
1399 if (state != SERVICE_START_PRE &&
1400 state != SERVICE_START &&
1401 state != SERVICE_START_POST &&
1402 state != SERVICE_RELOAD &&
1403 state != SERVICE_STOP &&
1404 state != SERVICE_STOP_SIGTERM &&
1405 state != SERVICE_STOP_SIGKILL &&
1406 state != SERVICE_STOP_POST &&
1407 state != SERVICE_FINAL_SIGTERM &&
1408 state != SERVICE_FINAL_SIGKILL) {
1409 service_unwatch_control_pid(s);
1410 s->control_command = NULL;
1411 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1412 }
1413
1414 if (state == SERVICE_DEAD ||
1415 state == SERVICE_STOP ||
1416 state == SERVICE_STOP_SIGTERM ||
1417 state == SERVICE_STOP_SIGKILL ||
1418 state == SERVICE_STOP_POST ||
1419 state == SERVICE_FINAL_SIGTERM ||
1420 state == SERVICE_FINAL_SIGKILL ||
1421 state == SERVICE_FAILED ||
1422 state == SERVICE_AUTO_RESTART)
1423 service_notify_sockets_dead(s);
1424
1425 if (state != SERVICE_START_PRE &&
1426 state != SERVICE_START &&
1427 state != SERVICE_START_POST &&
1428 state != SERVICE_RUNNING &&
1429 state != SERVICE_RELOAD &&
1430 state != SERVICE_STOP &&
1431 state != SERVICE_STOP_SIGTERM &&
1432 state != SERVICE_STOP_SIGKILL &&
1433 state != SERVICE_STOP_POST &&
1434 state != SERVICE_FINAL_SIGTERM &&
1435 state != SERVICE_FINAL_SIGKILL &&
1436 !(state == SERVICE_DEAD && s->meta.job)) {
1437 service_close_socket_fd(s);
1438 service_connection_unref(s);
1439 }
1440
1441 /* For the inactive states unit_notify() will trim the cgroup,
1442 * but for exit we have to do that ourselves... */
1443 if (state == SERVICE_EXITED)
1444 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1445
1446 if (old_state != state)
1447 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1448
1449 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1450 }
1451
1452 static int service_coldplug(Unit *u) {
1453 Service *s = SERVICE(u);
1454 int r;
1455
1456 assert(s);
1457 assert(s->state == SERVICE_DEAD);
1458
1459 if (s->deserialized_state != s->state) {
1460
1461 if (s->deserialized_state == SERVICE_START_PRE ||
1462 s->deserialized_state == SERVICE_START ||
1463 s->deserialized_state == SERVICE_START_POST ||
1464 s->deserialized_state == SERVICE_RELOAD ||
1465 s->deserialized_state == SERVICE_STOP ||
1466 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1467 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1468 s->deserialized_state == SERVICE_STOP_POST ||
1469 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1470 s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1471 s->deserialized_state == SERVICE_AUTO_RESTART) {
1472
1473 if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1474 usec_t k;
1475
1476 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1477
1478 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1479 return r;
1480 }
1481 }
1482
1483 if ((s->deserialized_state == SERVICE_START &&
1484 (s->type == SERVICE_FORKING ||
1485 s->type == SERVICE_DBUS ||
1486 s->type == SERVICE_ONESHOT ||
1487 s->type == SERVICE_NOTIFY)) ||
1488 s->deserialized_state == SERVICE_START_POST ||
1489 s->deserialized_state == SERVICE_RUNNING ||
1490 s->deserialized_state == SERVICE_RELOAD ||
1491 s->deserialized_state == SERVICE_STOP ||
1492 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1493 s->deserialized_state == SERVICE_STOP_SIGKILL)
1494 if (s->main_pid > 0)
1495 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1496 return r;
1497
1498 if (s->deserialized_state == SERVICE_START_PRE ||
1499 s->deserialized_state == SERVICE_START ||
1500 s->deserialized_state == SERVICE_START_POST ||
1501 s->deserialized_state == SERVICE_RELOAD ||
1502 s->deserialized_state == SERVICE_STOP ||
1503 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1504 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1505 s->deserialized_state == SERVICE_STOP_POST ||
1506 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1507 s->deserialized_state == SERVICE_FINAL_SIGKILL)
1508 if (s->control_pid > 0)
1509 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1510 return r;
1511
1512 service_set_state(s, s->deserialized_state);
1513 }
1514
1515 return 0;
1516 }
1517
1518 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1519 Iterator i;
1520 int r;
1521 int *rfds = NULL;
1522 unsigned rn_fds = 0;
1523 Set *set, *free_set = NULL;
1524 Socket *sock;
1525
1526 assert(s);
1527 assert(fds);
1528 assert(n_fds);
1529
1530 if (s->socket_fd >= 0)
1531 return 0;
1532
1533 if (!set_isempty(s->configured_sockets))
1534 set = s->configured_sockets;
1535 else {
1536 if ((r = service_get_sockets(s, &free_set)) < 0)
1537 return r;
1538
1539 set = free_set;
1540 }
1541
1542 SET_FOREACH(sock, set, i) {
1543 int *cfds;
1544 unsigned cn_fds;
1545
1546 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1547 goto fail;
1548
1549 if (!cfds)
1550 continue;
1551
1552 if (!rfds) {
1553 rfds = cfds;
1554 rn_fds = cn_fds;
1555 } else {
1556 int *t;
1557
1558 if (!(t = new(int, rn_fds+cn_fds))) {
1559 free(cfds);
1560 r = -ENOMEM;
1561 goto fail;
1562 }
1563
1564 memcpy(t, rfds, rn_fds);
1565 memcpy(t+rn_fds, cfds, cn_fds);
1566 free(rfds);
1567 free(cfds);
1568
1569 rfds = t;
1570 rn_fds = rn_fds+cn_fds;
1571 }
1572 }
1573
1574 *fds = rfds;
1575 *n_fds = rn_fds;
1576
1577 set_free(free_set);
1578
1579 return 0;
1580
1581 fail:
1582 set_free(set);
1583 free(rfds);
1584
1585 return r;
1586 }
1587
1588 static int service_spawn(
1589 Service *s,
1590 ExecCommand *c,
1591 bool timeout,
1592 bool pass_fds,
1593 bool apply_permissions,
1594 bool apply_chroot,
1595 bool apply_tty_stdin,
1596 bool set_notify_socket,
1597 pid_t *_pid) {
1598
1599 pid_t pid;
1600 int r;
1601 int *fds = NULL, *fdsbuf = NULL;
1602 unsigned n_fds = 0, n_env = 0;
1603 char **argv = NULL, **final_env = NULL, **our_env = NULL;
1604
1605 assert(s);
1606 assert(c);
1607 assert(_pid);
1608
1609 if (pass_fds ||
1610 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1611 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1612 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1613
1614 if (s->socket_fd >= 0) {
1615 fds = &s->socket_fd;
1616 n_fds = 1;
1617 } else {
1618 if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1619 goto fail;
1620
1621 fds = fdsbuf;
1622 }
1623 }
1624
1625 if (timeout && s->timeout_usec) {
1626 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1627 goto fail;
1628 } else
1629 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1630
1631 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1632 r = -ENOMEM;
1633 goto fail;
1634 }
1635
1636 if (!(our_env = new0(char*, 4))) {
1637 r = -ENOMEM;
1638 goto fail;
1639 }
1640
1641 if (set_notify_socket)
1642 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1643 r = -ENOMEM;
1644 goto fail;
1645 }
1646
1647 if (s->main_pid > 0)
1648 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1649 r = -ENOMEM;
1650 goto fail;
1651 }
1652
1653 if (!(final_env = strv_env_merge(2,
1654 s->meta.manager->environment,
1655 our_env,
1656 NULL))) {
1657 r = -ENOMEM;
1658 goto fail;
1659 }
1660
1661 r = exec_spawn(c,
1662 argv,
1663 &s->exec_context,
1664 fds, n_fds,
1665 final_env,
1666 apply_permissions,
1667 apply_chroot,
1668 apply_tty_stdin,
1669 s->meta.manager->confirm_spawn,
1670 s->meta.cgroup_bondings,
1671 &pid);
1672
1673 if (r < 0)
1674 goto fail;
1675
1676
1677 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1678 /* FIXME: we need to do something here */
1679 goto fail;
1680
1681 free(fdsbuf);
1682 strv_free(argv);
1683 strv_free(our_env);
1684 strv_free(final_env);
1685
1686 *_pid = pid;
1687
1688 return 0;
1689
1690 fail:
1691 free(fdsbuf);
1692 strv_free(argv);
1693 strv_free(our_env);
1694 strv_free(final_env);
1695
1696 if (timeout)
1697 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1698
1699 return r;
1700 }
1701
1702 static int main_pid_good(Service *s) {
1703 assert(s);
1704
1705 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1706 * don't know */
1707
1708 /* If we know the pid file, then lets just check if it is
1709 * still valid */
1710 if (s->main_pid_known)
1711 return s->main_pid > 0;
1712
1713 /* We don't know the pid */
1714 return -EAGAIN;
1715 }
1716
1717 static int control_pid_good(Service *s) {
1718 assert(s);
1719
1720 return s->control_pid > 0;
1721 }
1722
1723 static int cgroup_good(Service *s) {
1724 int r;
1725
1726 assert(s);
1727
1728 if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1729 return r;
1730
1731 return !r;
1732 }
1733
1734 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1735 int r;
1736 assert(s);
1737
1738 if (!success)
1739 s->failure = true;
1740
1741 if (allow_restart &&
1742 !s->forbid_restart &&
1743 (s->restart == SERVICE_RESTART_ALWAYS ||
1744 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1745 (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1746 (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1747 (s->main_exec_status.code == CLD_KILLED ||
1748 s->main_exec_status.code == CLD_DUMPED)))) {
1749
1750 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1751 goto fail;
1752
1753 service_set_state(s, SERVICE_AUTO_RESTART);
1754 } else
1755 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1756
1757 s->forbid_restart = false;
1758
1759 return;
1760
1761 fail:
1762 log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1763 service_enter_dead(s, false, false);
1764 }
1765
1766 static void service_enter_signal(Service *s, ServiceState state, bool success);
1767
1768 static void service_enter_stop_post(Service *s, bool success) {
1769 int r;
1770 assert(s);
1771
1772 if (!success)
1773 s->failure = true;
1774
1775 service_unwatch_control_pid(s);
1776
1777 s->control_command_id = SERVICE_EXEC_STOP_POST;
1778 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1779 if ((r = service_spawn(s,
1780 s->control_command,
1781 true,
1782 false,
1783 !s->permissions_start_only,
1784 !s->root_directory_start_only,
1785 true,
1786 false,
1787 &s->control_pid)) < 0)
1788 goto fail;
1789
1790
1791 service_set_state(s, SERVICE_STOP_POST);
1792 } else
1793 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1794
1795 return;
1796
1797 fail:
1798 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1799 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1800 }
1801
1802 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1803 int r;
1804 Set *pid_set = NULL;
1805 bool wait_for_exit = false;
1806
1807 assert(s);
1808
1809 if (!success)
1810 s->failure = true;
1811
1812 if (s->exec_context.kill_mode != KILL_NONE) {
1813 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1814
1815 if (s->main_pid > 0) {
1816 if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1817 -s->main_pid :
1818 s->main_pid, sig) < 0 && errno != ESRCH)
1819
1820 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1821 else
1822 wait_for_exit = true;
1823 }
1824
1825 if (s->control_pid > 0) {
1826 if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1827 -s->control_pid :
1828 s->control_pid, sig) < 0 && errno != ESRCH)
1829
1830 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1831 else
1832 wait_for_exit = true;
1833 }
1834
1835 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1836
1837 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1838 r = -ENOMEM;
1839 goto fail;
1840 }
1841
1842 /* Exclude the main/control pids from being killed via the cgroup */
1843 if (s->main_pid > 0)
1844 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1845 goto fail;
1846
1847 if (s->control_pid > 0)
1848 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1849 goto fail;
1850
1851 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1852 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1853 log_warning("Failed to kill control group: %s", strerror(-r));
1854 } else if (r > 0)
1855 wait_for_exit = true;
1856
1857 set_free(pid_set);
1858 }
1859 }
1860
1861 if (wait_for_exit) {
1862 if (s->timeout_usec > 0)
1863 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1864 goto fail;
1865
1866 service_set_state(s, state);
1867 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1868 service_enter_stop_post(s, true);
1869 else
1870 service_enter_dead(s, true, true);
1871
1872 return;
1873
1874 fail:
1875 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1876
1877 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1878 service_enter_stop_post(s, false);
1879 else
1880 service_enter_dead(s, false, true);
1881
1882 if (pid_set)
1883 set_free(pid_set);
1884 }
1885
1886 static void service_enter_stop(Service *s, bool success) {
1887 int r;
1888
1889 assert(s);
1890
1891 if (!success)
1892 s->failure = true;
1893
1894 service_unwatch_control_pid(s);
1895
1896 s->control_command_id = SERVICE_EXEC_STOP;
1897 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1898 if ((r = service_spawn(s,
1899 s->control_command,
1900 true,
1901 false,
1902 !s->permissions_start_only,
1903 !s->root_directory_start_only,
1904 false,
1905 false,
1906 &s->control_pid)) < 0)
1907 goto fail;
1908
1909 service_set_state(s, SERVICE_STOP);
1910 } else
1911 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1912
1913 return;
1914
1915 fail:
1916 log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1917 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1918 }
1919
1920 static void service_enter_running(Service *s, bool success) {
1921 int main_pid_ok, cgroup_ok;
1922 assert(s);
1923
1924 if (!success)
1925 s->failure = true;
1926
1927 main_pid_ok = main_pid_good(s);
1928 cgroup_ok = cgroup_good(s);
1929
1930 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1931 (s->bus_name_good || s->type != SERVICE_DBUS))
1932 service_set_state(s, SERVICE_RUNNING);
1933 else if (s->remain_after_exit)
1934 service_set_state(s, SERVICE_EXITED);
1935 else
1936 service_enter_stop(s, true);
1937 }
1938
1939 static void service_enter_start_post(Service *s) {
1940 int r;
1941 assert(s);
1942
1943 service_unwatch_control_pid(s);
1944
1945 s->control_command_id = SERVICE_EXEC_START_POST;
1946 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1947 if ((r = service_spawn(s,
1948 s->control_command,
1949 true,
1950 false,
1951 !s->permissions_start_only,
1952 !s->root_directory_start_only,
1953 false,
1954 false,
1955 &s->control_pid)) < 0)
1956 goto fail;
1957
1958 service_set_state(s, SERVICE_START_POST);
1959 } else
1960 service_enter_running(s, true);
1961
1962 return;
1963
1964 fail:
1965 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1966 service_enter_stop(s, false);
1967 }
1968
1969 static void service_enter_start(Service *s) {
1970 pid_t pid;
1971 int r;
1972
1973 assert(s);
1974
1975 assert(s->exec_command[SERVICE_EXEC_START]);
1976 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1977
1978 if (s->type == SERVICE_FORKING)
1979 service_unwatch_control_pid(s);
1980 else
1981 service_unwatch_main_pid(s);
1982
1983 s->control_command_id = SERVICE_EXEC_START;
1984 s->control_command = s->exec_command[SERVICE_EXEC_START];
1985
1986 if ((r = service_spawn(s,
1987 s->control_command,
1988 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1989 true,
1990 true,
1991 true,
1992 true,
1993 s->notify_access != NOTIFY_NONE,
1994 &pid)) < 0)
1995 goto fail;
1996
1997 if (s->type == SERVICE_SIMPLE) {
1998 /* For simple services we immediately start
1999 * the START_POST binaries. */
2000
2001 service_set_main_pid(s, pid);
2002 service_enter_start_post(s);
2003
2004 } else if (s->type == SERVICE_FORKING) {
2005
2006 /* For forking services we wait until the start
2007 * process exited. */
2008
2009 s->control_pid = pid;
2010 service_set_state(s, SERVICE_START);
2011
2012 } else if (s->type == SERVICE_ONESHOT ||
2013 s->type == SERVICE_DBUS ||
2014 s->type == SERVICE_NOTIFY) {
2015
2016 /* For oneshot services we wait until the start
2017 * process exited, too, but it is our main process. */
2018
2019 /* For D-Bus services we know the main pid right away,
2020 * but wait for the bus name to appear on the
2021 * bus. Notify services are similar. */
2022
2023 service_set_main_pid(s, pid);
2024 service_set_state(s, SERVICE_START);
2025 } else
2026 assert_not_reached("Unknown service type");
2027
2028 return;
2029
2030 fail:
2031 log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2032 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2033 }
2034
2035 static void service_enter_start_pre(Service *s) {
2036 int r;
2037
2038 assert(s);
2039
2040 service_unwatch_control_pid(s);
2041
2042 s->control_command_id = SERVICE_EXEC_START_PRE;
2043 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2044 if ((r = service_spawn(s,
2045 s->control_command,
2046 true,
2047 false,
2048 !s->permissions_start_only,
2049 !s->root_directory_start_only,
2050 true,
2051 false,
2052 &s->control_pid)) < 0)
2053 goto fail;
2054
2055 service_set_state(s, SERVICE_START_PRE);
2056 } else
2057 service_enter_start(s);
2058
2059 return;
2060
2061 fail:
2062 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2063 service_enter_dead(s, false, true);
2064 }
2065
2066 static void service_enter_restart(Service *s) {
2067 int r;
2068 DBusError error;
2069
2070 assert(s);
2071 dbus_error_init(&error);
2072
2073 if (s->meta.job) {
2074 log_info("Job pending for unit, delaying automatic restart.");
2075
2076 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2077 goto fail;
2078 }
2079
2080 service_enter_dead(s, true, false);
2081
2082 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2083 goto fail;
2084
2085 log_debug("%s scheduled restart job.", s->meta.id);
2086 return;
2087
2088 fail:
2089 log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2090 service_enter_dead(s, false, false);
2091
2092 dbus_error_free(&error);
2093 }
2094
2095 static void service_enter_reload(Service *s) {
2096 int r;
2097
2098 assert(s);
2099
2100 service_unwatch_control_pid(s);
2101
2102 s->control_command_id = SERVICE_EXEC_RELOAD;
2103 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2104 if ((r = service_spawn(s,
2105 s->control_command,
2106 true,
2107 false,
2108 !s->permissions_start_only,
2109 !s->root_directory_start_only,
2110 false,
2111 false,
2112 &s->control_pid)) < 0)
2113 goto fail;
2114
2115 service_set_state(s, SERVICE_RELOAD);
2116 } else
2117 service_enter_running(s, true);
2118
2119 return;
2120
2121 fail:
2122 log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2123 service_enter_stop(s, false);
2124 }
2125
2126 static void service_run_next_control(Service *s, bool success) {
2127 int r;
2128
2129 assert(s);
2130 assert(s->control_command);
2131 assert(s->control_command->command_next);
2132
2133 if (!success)
2134 s->failure = true;
2135
2136 assert(s->control_command_id != SERVICE_EXEC_START);
2137
2138 s->control_command = s->control_command->command_next;
2139 service_unwatch_control_pid(s);
2140
2141 if ((r = service_spawn(s,
2142 s->control_command,
2143 true,
2144 false,
2145 !s->permissions_start_only,
2146 !s->root_directory_start_only,
2147 s->control_command_id == SERVICE_EXEC_START_PRE ||
2148 s->control_command_id == SERVICE_EXEC_STOP_POST,
2149 false,
2150 &s->control_pid)) < 0)
2151 goto fail;
2152
2153 return;
2154
2155 fail:
2156 log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2157
2158 if (s->state == SERVICE_START_PRE)
2159 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2160 else if (s->state == SERVICE_STOP)
2161 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2162 else if (s->state == SERVICE_STOP_POST)
2163 service_enter_dead(s, false, true);
2164 else
2165 service_enter_stop(s, false);
2166 }
2167
2168 static void service_run_next_main(Service *s, bool success) {
2169 pid_t pid;
2170 int r;
2171
2172 assert(s);
2173 assert(s->control_command);
2174 assert(s->control_command->command_next);
2175
2176 if (!success)
2177 s->failure = true;
2178
2179 assert(s->control_command_id == SERVICE_EXEC_START);
2180 assert(s->type == SERVICE_ONESHOT);
2181
2182 s->control_command = s->control_command->command_next;
2183 service_unwatch_main_pid(s);
2184
2185 if ((r = service_spawn(s,
2186 s->control_command,
2187 false,
2188 true,
2189 true,
2190 true,
2191 true,
2192 s->notify_access != NOTIFY_NONE,
2193 &pid)) < 0)
2194 goto fail;
2195
2196 service_set_main_pid(s, pid);
2197
2198 return;
2199
2200 fail:
2201 log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2202 service_enter_stop(s, false);
2203 }
2204
2205 static int service_start(Unit *u) {
2206 Service *s = SERVICE(u);
2207
2208 assert(s);
2209
2210 /* We cannot fulfill this request right now, try again later
2211 * please! */
2212 if (s->state == SERVICE_STOP ||
2213 s->state == SERVICE_STOP_SIGTERM ||
2214 s->state == SERVICE_STOP_SIGKILL ||
2215 s->state == SERVICE_STOP_POST ||
2216 s->state == SERVICE_FINAL_SIGTERM ||
2217 s->state == SERVICE_FINAL_SIGKILL)
2218 return -EAGAIN;
2219
2220 /* Already on it! */
2221 if (s->state == SERVICE_START_PRE ||
2222 s->state == SERVICE_START ||
2223 s->state == SERVICE_START_POST)
2224 return 0;
2225
2226 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2227
2228 /* Make sure we don't enter a busy loop of some kind. */
2229 if (!ratelimit_test(&s->ratelimit)) {
2230 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2231 return -ECANCELED;
2232 }
2233
2234 s->failure = false;
2235 s->main_pid_known = false;
2236 s->forbid_restart = false;
2237
2238 service_enter_start_pre(s);
2239 return 0;
2240 }
2241
2242 static int service_stop(Unit *u) {
2243 Service *s = SERVICE(u);
2244
2245 assert(s);
2246
2247 /* This is a user request, so don't do restarts on this
2248 * shutdown. */
2249 s->forbid_restart = true;
2250
2251 /* Already on it */
2252 if (s->state == SERVICE_STOP ||
2253 s->state == SERVICE_STOP_SIGTERM ||
2254 s->state == SERVICE_STOP_SIGKILL ||
2255 s->state == SERVICE_STOP_POST ||
2256 s->state == SERVICE_FINAL_SIGTERM ||
2257 s->state == SERVICE_FINAL_SIGKILL)
2258 return 0;
2259
2260 /* Don't allow a restart */
2261 if (s->state == SERVICE_AUTO_RESTART) {
2262 service_set_state(s, SERVICE_DEAD);
2263 return 0;
2264 }
2265
2266 /* If there's already something running we go directly into
2267 * kill mode. */
2268 if (s->state == SERVICE_START_PRE ||
2269 s->state == SERVICE_START ||
2270 s->state == SERVICE_START_POST ||
2271 s->state == SERVICE_RELOAD) {
2272 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2273 return 0;
2274 }
2275
2276 assert(s->state == SERVICE_RUNNING ||
2277 s->state == SERVICE_EXITED);
2278
2279 service_enter_stop(s, true);
2280 return 0;
2281 }
2282
2283 static int service_reload(Unit *u) {
2284 Service *s = SERVICE(u);
2285
2286 assert(s);
2287
2288 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2289
2290 service_enter_reload(s);
2291 return 0;
2292 }
2293
2294 static bool service_can_reload(Unit *u) {
2295 Service *s = SERVICE(u);
2296
2297 assert(s);
2298
2299 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2300 }
2301
2302 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2303 Service *s = SERVICE(u);
2304
2305 assert(u);
2306 assert(f);
2307 assert(fds);
2308
2309 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2310 unit_serialize_item(u, f, "failure", yes_no(s->failure));
2311
2312 if (s->control_pid > 0)
2313 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2314
2315 if (s->main_pid_known && s->main_pid > 0)
2316 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2317
2318 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2319
2320 if (s->status_text)
2321 unit_serialize_item(u, f, "status-text", s->status_text);
2322
2323 /* There's a minor uncleanliness here: if there are multiple
2324 * commands attached here, we will start from the first one
2325 * again */
2326 if (s->control_command_id >= 0)
2327 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2328
2329 if (s->socket_fd >= 0) {
2330 int copy;
2331
2332 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2333 return copy;
2334
2335 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2336 }
2337
2338 if (s->main_exec_status.pid > 0) {
2339 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2340 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2341 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2342
2343 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2344 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2345 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2346 }
2347 }
2348
2349 return 0;
2350 }
2351
2352 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2353 Service *s = SERVICE(u);
2354
2355 assert(u);
2356 assert(key);
2357 assert(value);
2358 assert(fds);
2359
2360 if (streq(key, "state")) {
2361 ServiceState state;
2362
2363 if ((state = service_state_from_string(value)) < 0)
2364 log_debug("Failed to parse state value %s", value);
2365 else
2366 s->deserialized_state = state;
2367 } else if (streq(key, "failure")) {
2368 int b;
2369
2370 if ((b = parse_boolean(value)) < 0)
2371 log_debug("Failed to parse failure value %s", value);
2372 else
2373 s->failure = b || s->failure;
2374 } else if (streq(key, "control-pid")) {
2375 pid_t pid;
2376
2377 if (parse_pid(value, &pid) < 0)
2378 log_debug("Failed to parse control-pid value %s", value);
2379 else
2380 s->control_pid = pid;
2381 } else if (streq(key, "main-pid")) {
2382 pid_t pid;
2383
2384 if (parse_pid(value, &pid) < 0)
2385 log_debug("Failed to parse main-pid value %s", value);
2386 else
2387 service_set_main_pid(s, (pid_t) pid);
2388 } else if (streq(key, "main-pid-known")) {
2389 int b;
2390
2391 if ((b = parse_boolean(value)) < 0)
2392 log_debug("Failed to parse main-pid-known value %s", value);
2393 else
2394 s->main_pid_known = b;
2395 } else if (streq(key, "status-text")) {
2396 char *t;
2397
2398 if ((t = strdup(value))) {
2399 free(s->status_text);
2400 s->status_text = t;
2401 }
2402
2403 } else if (streq(key, "control-command")) {
2404 ServiceExecCommand id;
2405
2406 if ((id = service_exec_command_from_string(value)) < 0)
2407 log_debug("Failed to parse exec-command value %s", value);
2408 else {
2409 s->control_command_id = id;
2410 s->control_command = s->exec_command[id];
2411 }
2412 } else if (streq(key, "socket-fd")) {
2413 int fd;
2414
2415 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2416 log_debug("Failed to parse socket-fd value %s", value);
2417 else {
2418
2419 if (s->socket_fd >= 0)
2420 close_nointr_nofail(s->socket_fd);
2421 s->socket_fd = fdset_remove(fds, fd);
2422 }
2423 } else if (streq(key, "main-exec-status-pid")) {
2424 pid_t pid;
2425
2426 if (parse_pid(value, &pid) < 0)
2427 log_debug("Failed to parse main-exec-status-pid value %s", value);
2428 else
2429 s->main_exec_status.pid = pid;
2430 } else if (streq(key, "main-exec-status-code")) {
2431 int i;
2432
2433 if (safe_atoi(value, &i) < 0)
2434 log_debug("Failed to parse main-exec-status-code value %s", value);
2435 else
2436 s->main_exec_status.code = i;
2437 } else if (streq(key, "main-exec-status-status")) {
2438 int i;
2439
2440 if (safe_atoi(value, &i) < 0)
2441 log_debug("Failed to parse main-exec-status-status value %s", value);
2442 else
2443 s->main_exec_status.status = i;
2444 } else if (streq(key, "main-exec-status-start"))
2445 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2446 else if (streq(key, "main-exec-status-exit"))
2447 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2448 else
2449 log_debug("Unknown serialization key '%s'", key);
2450
2451 return 0;
2452 }
2453
2454 static UnitActiveState service_active_state(Unit *u) {
2455 assert(u);
2456
2457 return state_translation_table[SERVICE(u)->state];
2458 }
2459
2460 static const char *service_sub_state_to_string(Unit *u) {
2461 assert(u);
2462
2463 return service_state_to_string(SERVICE(u)->state);
2464 }
2465
2466 #ifdef HAVE_SYSV_COMPAT
2467 static bool service_check_gc(Unit *u) {
2468 Service *s = SERVICE(u);
2469
2470 assert(s);
2471
2472 return !!s->sysv_path;
2473 }
2474 #endif
2475
2476 static bool service_check_snapshot(Unit *u) {
2477 Service *s = SERVICE(u);
2478
2479 assert(s);
2480
2481 return !s->got_socket_fd;
2482 }
2483
2484 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2485 Service *s = SERVICE(u);
2486 bool success;
2487
2488 assert(s);
2489 assert(pid >= 0);
2490
2491 if (!s->meta.fragment_path)
2492 success = is_clean_exit_lsb(code, status);
2493 else
2494 success = is_clean_exit(code, status);
2495
2496 if (s->main_pid == pid) {
2497
2498 s->main_pid = 0;
2499 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2500
2501 if (s->type != SERVICE_FORKING && s->control_command) {
2502 s->control_command->exec_status = s->main_exec_status;
2503
2504 if (s->control_command->ignore)
2505 success = true;
2506 }
2507
2508 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2509 "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2510 s->failure = s->failure || !success;
2511
2512 if (s->control_command &&
2513 s->control_command->command_next &&
2514 success) {
2515
2516 /* There is another command to *
2517 * execute, so let's do that. */
2518
2519 log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2520 service_run_next_main(s, success);
2521
2522 } else {
2523
2524 /* The service exited, so the service is officially
2525 * gone. */
2526
2527 s->control_command = NULL;
2528 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2529
2530 switch (s->state) {
2531
2532 case SERVICE_START_POST:
2533 case SERVICE_RELOAD:
2534 case SERVICE_STOP:
2535 /* Need to wait until the operation is
2536 * done */
2537 break;
2538
2539 case SERVICE_START:
2540 if (s->type == SERVICE_ONESHOT) {
2541 /* This was our main goal, so let's go on */
2542 if (success)
2543 service_enter_start_post(s);
2544 else
2545 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2546 break;
2547 } else {
2548 assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2549
2550 /* Fall through */
2551 }
2552
2553 case SERVICE_RUNNING:
2554 service_enter_running(s, success);
2555 break;
2556
2557 case SERVICE_STOP_SIGTERM:
2558 case SERVICE_STOP_SIGKILL:
2559
2560 if (!control_pid_good(s))
2561 service_enter_stop_post(s, success);
2562
2563 /* If there is still a control process, wait for that first */
2564 break;
2565
2566 default:
2567 assert_not_reached("Uh, main process died at wrong time.");
2568 }
2569 }
2570
2571 } else if (s->control_pid == pid) {
2572
2573 s->control_pid = 0;
2574
2575 if (s->control_command) {
2576 exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2577
2578 if (s->control_command->ignore)
2579 success = true;
2580 }
2581
2582 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2583 "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2584 s->failure = s->failure || !success;
2585
2586 if (s->control_command &&
2587 s->control_command->command_next &&
2588 success) {
2589
2590 /* There is another command to *
2591 * execute, so let's do that. */
2592
2593 log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2594 service_run_next_control(s, success);
2595
2596 } else {
2597 /* No further commands for this step, so let's
2598 * figure out what to do next */
2599
2600 s->control_command = NULL;
2601 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2602
2603 log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2604
2605 switch (s->state) {
2606
2607 case SERVICE_START_PRE:
2608 if (success)
2609 service_enter_start(s);
2610 else
2611 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2612 break;
2613
2614 case SERVICE_START:
2615 assert(s->type == SERVICE_FORKING);
2616
2617 /* Let's try to load the pid
2618 * file here if we can. We
2619 * ignore the return value,
2620 * since the PID file might
2621 * actually be created by a
2622 * START_POST script */
2623
2624 if (success) {
2625 service_load_pid_file(s);
2626 service_search_main_pid(s);
2627
2628 service_enter_start_post(s);
2629 } else
2630 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2631
2632 break;
2633
2634 case SERVICE_START_POST:
2635 if (success && s->pid_file && !s->main_pid_known) {
2636 int r;
2637
2638 /* Hmm, let's see if we can
2639 * load the pid now after the
2640 * start-post scripts got
2641 * executed. */
2642
2643 if ((r = service_load_pid_file(s)) < 0)
2644 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2645 }
2646
2647 /* Fall through */
2648
2649 case SERVICE_RELOAD:
2650 if (success)
2651 service_enter_running(s, true);
2652 else
2653 service_enter_stop(s, false);
2654
2655 break;
2656
2657 case SERVICE_STOP:
2658 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2659 break;
2660
2661 case SERVICE_STOP_SIGTERM:
2662 case SERVICE_STOP_SIGKILL:
2663 if (main_pid_good(s) <= 0)
2664 service_enter_stop_post(s, success);
2665
2666 /* If there is still a service
2667 * process around, wait until
2668 * that one quit, too */
2669 break;
2670
2671 case SERVICE_STOP_POST:
2672 case SERVICE_FINAL_SIGTERM:
2673 case SERVICE_FINAL_SIGKILL:
2674 service_enter_dead(s, success, true);
2675 break;
2676
2677 default:
2678 assert_not_reached("Uh, control process died at wrong time.");
2679 }
2680 }
2681 }
2682
2683 /* Notify clients about changed exit status */
2684 unit_add_to_dbus_queue(u);
2685 }
2686
2687 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2688 Service *s = SERVICE(u);
2689
2690 assert(s);
2691 assert(elapsed == 1);
2692
2693 assert(w == &s->timer_watch);
2694
2695 switch (s->state) {
2696
2697 case SERVICE_START_PRE:
2698 case SERVICE_START:
2699 log_warning("%s operation timed out. Terminating.", u->meta.id);
2700 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2701 break;
2702
2703 case SERVICE_START_POST:
2704 case SERVICE_RELOAD:
2705 log_warning("%s operation timed out. Stopping.", u->meta.id);
2706 service_enter_stop(s, false);
2707 break;
2708
2709 case SERVICE_STOP:
2710 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2711 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2712 break;
2713
2714 case SERVICE_STOP_SIGTERM:
2715 if (s->exec_context.send_sigkill) {
2716 log_warning("%s stopping timed out. Killing.", u->meta.id);
2717 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2718 } else {
2719 log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2720 service_enter_stop_post(s, false);
2721 }
2722
2723 break;
2724
2725 case SERVICE_STOP_SIGKILL:
2726 /* Uh, wie sent a SIGKILL and it is still not gone?
2727 * Must be something we cannot kill, so let's just be
2728 * weirded out and continue */
2729
2730 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2731 service_enter_stop_post(s, false);
2732 break;
2733
2734 case SERVICE_STOP_POST:
2735 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2736 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2737 break;
2738
2739 case SERVICE_FINAL_SIGTERM:
2740 if (s->exec_context.send_sigkill) {
2741 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2742 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2743 } else {
2744 log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2745 service_enter_dead(s, false, true);
2746 }
2747
2748 break;
2749
2750 case SERVICE_FINAL_SIGKILL:
2751 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2752 service_enter_dead(s, false, true);
2753 break;
2754
2755 case SERVICE_AUTO_RESTART:
2756 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2757 service_enter_restart(s);
2758 break;
2759
2760 default:
2761 assert_not_reached("Timeout at wrong time.");
2762 }
2763 }
2764
2765 static void service_cgroup_notify_event(Unit *u) {
2766 Service *s = SERVICE(u);
2767
2768 assert(u);
2769
2770 log_debug("%s: cgroup is empty", u->meta.id);
2771
2772 switch (s->state) {
2773
2774 /* Waiting for SIGCHLD is usually more interesting,
2775 * because it includes return codes/signals. Which is
2776 * why we ignore the cgroup events for most cases,
2777 * except when we don't know pid which to expect the
2778 * SIGCHLD for. */
2779
2780 case SERVICE_RUNNING:
2781 service_enter_running(s, true);
2782 break;
2783
2784 case SERVICE_STOP_SIGTERM:
2785 case SERVICE_STOP_SIGKILL:
2786 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2787 service_enter_stop_post(s, true);
2788
2789 break;
2790
2791 case SERVICE_FINAL_SIGTERM:
2792 case SERVICE_FINAL_SIGKILL:
2793 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2794 service_enter_dead(s, true, true);
2795
2796 break;
2797
2798 default:
2799 ;
2800 }
2801 }
2802
2803 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2804 Service *s = SERVICE(u);
2805 const char *e;
2806
2807 assert(u);
2808
2809 if (s->notify_access == NOTIFY_NONE) {
2810 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2811 u->meta.id, (unsigned long) pid);
2812 return;
2813 }
2814
2815 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2816 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2817 u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2818 return;
2819 }
2820
2821 log_debug("%s: Got message", u->meta.id);
2822
2823 /* Interpret MAINPID= */
2824 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2825 (s->state == SERVICE_START ||
2826 s->state == SERVICE_START_POST ||
2827 s->state == SERVICE_RUNNING ||
2828 s->state == SERVICE_RELOAD)) {
2829
2830 if (parse_pid(e + 8, &pid) < 0)
2831 log_warning("Failed to parse notification message %s", e);
2832 else {
2833 log_debug("%s: got %s", u->meta.id, e);
2834 service_set_main_pid(s, pid);
2835 }
2836 }
2837
2838 /* Interpret READY= */
2839 if (s->type == SERVICE_NOTIFY &&
2840 s->state == SERVICE_START &&
2841 strv_find(tags, "READY=1")) {
2842 log_debug("%s: got READY=1", u->meta.id);
2843
2844 service_enter_start_post(s);
2845 }
2846
2847 /* Interpret STATUS= */
2848 if ((e = strv_find_prefix(tags, "STATUS="))) {
2849 char *t;
2850
2851 if (e[7]) {
2852 if (!(t = strdup(e+7))) {
2853 log_error("Failed to allocate string.");
2854 return;
2855 }
2856
2857 log_debug("%s: got %s", u->meta.id, e);
2858
2859 free(s->status_text);
2860 s->status_text = t;
2861 } else {
2862 free(s->status_text);
2863 s->status_text = NULL;
2864 }
2865
2866 }
2867
2868 /* Notify clients about changed status or main pid */
2869 unit_add_to_dbus_queue(u);
2870 }
2871
2872 #ifdef HAVE_SYSV_COMPAT
2873 static int service_enumerate(Manager *m) {
2874 char **p;
2875 unsigned i;
2876 DIR *d = NULL;
2877 char *path = NULL, *fpath = NULL, *name = NULL;
2878 Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2879 Unit *service;
2880 Iterator j;
2881 int r;
2882
2883 assert(m);
2884
2885 zero(runlevel_services);
2886
2887 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2888 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2889 struct dirent *de;
2890
2891 free(path);
2892 path = NULL;
2893 if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2894 r = -ENOMEM;
2895 goto finish;
2896 }
2897
2898 if (d)
2899 closedir(d);
2900
2901 if (!(d = opendir(path))) {
2902 if (errno != ENOENT)
2903 log_warning("opendir() failed on %s: %s", path, strerror(errno));
2904
2905 continue;
2906 }
2907
2908 while ((de = readdir(d))) {
2909 int a, b;
2910
2911 if (ignore_file(de->d_name))
2912 continue;
2913
2914 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2915 continue;
2916
2917 if (strlen(de->d_name) < 4)
2918 continue;
2919
2920 a = undecchar(de->d_name[1]);
2921 b = undecchar(de->d_name[2]);
2922
2923 if (a < 0 || b < 0)
2924 continue;
2925
2926 free(fpath);
2927 fpath = NULL;
2928 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2929 r = -ENOMEM;
2930 goto finish;
2931 }
2932
2933 if (access(fpath, X_OK) < 0) {
2934
2935 if (errno != ENOENT)
2936 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2937
2938 continue;
2939 }
2940
2941 free(name);
2942 if (!(name = sysv_translate_name(de->d_name + 3))) {
2943 r = -ENOMEM;
2944 goto finish;
2945 }
2946
2947 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2948 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2949 continue;
2950 }
2951
2952 if (de->d_name[0] == 'S') {
2953
2954 if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
2955 SERVICE(service)->sysv_start_priority =
2956 MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2957
2958 SERVICE(service)->sysv_enabled = true;
2959 }
2960
2961 if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
2962 goto finish;
2963
2964 if ((r = set_put(runlevel_services[i], service)) < 0)
2965 goto finish;
2966
2967 } else if (de->d_name[0] == 'K' &&
2968 (rcnd_table[i].type == RUNLEVEL_DOWN ||
2969 rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2970
2971 if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
2972 goto finish;
2973
2974 if ((r = set_put(shutdown_services, service)) < 0)
2975 goto finish;
2976 }
2977 }
2978 }
2979
2980 /* Now we loaded all stubs and are aware of the lowest
2981 start-up priority for all services, not let's actually load
2982 the services, this will also tell us which services are
2983 actually native now */
2984 manager_dispatch_load_queue(m);
2985
2986 /* If this is a native service, rely on native ways to pull in
2987 * a service, don't pull it in via sysv rcN.d links. */
2988 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
2989 SET_FOREACH(service, runlevel_services[i], j) {
2990 service = unit_follow_merge(service);
2991
2992 if (service->meta.fragment_path)
2993 continue;
2994
2995 if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
2996 goto finish;
2997 }
2998
2999 /* We honour K links only for halt/reboot. For the normal
3000 * runlevels we assume the stop jobs will be implicitly added
3001 * by the core logic. Also, we don't really distuingish here
3002 * between the runlevels 0 and 6 and just add them to the
3003 * special shutdown target. On SUSE the boot.d/ runlevel is
3004 * also used for shutdown, so we add links for that too to the
3005 * shutdown target.*/
3006 SET_FOREACH(service, shutdown_services, j) {
3007 service = unit_follow_merge(service);
3008
3009 if (service->meta.fragment_path)
3010 continue;
3011
3012 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3013 goto finish;
3014 }
3015
3016 r = 0;
3017
3018 finish:
3019 free(path);
3020 free(fpath);
3021 free(name);
3022
3023 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3024 set_free(runlevel_services[i]);
3025 set_free(shutdown_services);
3026
3027 if (d)
3028 closedir(d);
3029
3030 return r;
3031 }
3032 #endif
3033
3034 static void service_bus_name_owner_change(
3035 Unit *u,
3036 const char *name,
3037 const char *old_owner,
3038 const char *new_owner) {
3039
3040 Service *s = SERVICE(u);
3041
3042 assert(s);
3043 assert(name);
3044
3045 assert(streq(s->bus_name, name));
3046 assert(old_owner || new_owner);
3047
3048 if (old_owner && new_owner)
3049 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3050 else if (old_owner)
3051 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3052 else
3053 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3054
3055 s->bus_name_good = !!new_owner;
3056
3057 if (s->type == SERVICE_DBUS) {
3058
3059 /* service_enter_running() will figure out what to
3060 * do */
3061 if (s->state == SERVICE_RUNNING)
3062 service_enter_running(s, true);
3063 else if (s->state == SERVICE_START && new_owner)
3064 service_enter_start_post(s);
3065
3066 } else if (new_owner &&
3067 s->main_pid <= 0 &&
3068 (s->state == SERVICE_START ||
3069 s->state == SERVICE_START_POST ||
3070 s->state == SERVICE_RUNNING ||
3071 s->state == SERVICE_RELOAD)) {
3072
3073 /* Try to acquire PID from bus service */
3074 log_debug("Trying to acquire PID from D-Bus name...");
3075
3076 bus_query_pid(u->meta.manager, name);
3077 }
3078 }
3079
3080 static void service_bus_query_pid_done(
3081 Unit *u,
3082 const char *name,
3083 pid_t pid) {
3084
3085 Service *s = SERVICE(u);
3086
3087 assert(s);
3088 assert(name);
3089
3090 log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3091
3092 if (s->main_pid <= 0 &&
3093 (s->state == SERVICE_START ||
3094 s->state == SERVICE_START_POST ||
3095 s->state == SERVICE_RUNNING ||
3096 s->state == SERVICE_RELOAD))
3097 service_set_main_pid(s, pid);
3098 }
3099
3100 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3101 assert(s);
3102 assert(fd >= 0);
3103
3104 /* This is called by the socket code when instantiating a new
3105 * service for a stream socket and the socket needs to be
3106 * configured. */
3107
3108 if (s->meta.load_state != UNIT_LOADED)
3109 return -EINVAL;
3110
3111 if (s->socket_fd >= 0)
3112 return -EBUSY;
3113
3114 if (s->state != SERVICE_DEAD)
3115 return -EAGAIN;
3116
3117 s->socket_fd = fd;
3118 s->got_socket_fd = true;
3119 s->accept_socket = sock;
3120
3121 return 0;
3122 }
3123
3124 static void service_reset_failed(Unit *u) {
3125 Service *s = SERVICE(u);
3126
3127 assert(s);
3128
3129 if (s->state == SERVICE_FAILED)
3130 service_set_state(s, SERVICE_DEAD);
3131
3132 s->failure = false;
3133 }
3134
3135 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3136 Service *s = SERVICE(u);
3137 int r = 0;
3138 Set *pid_set = NULL;
3139
3140 assert(s);
3141
3142 if (s->main_pid <= 0 && who == KILL_MAIN) {
3143 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3144 return -EINVAL;
3145 }
3146
3147 if (s->control_pid <= 0 && who == KILL_CONTROL) {
3148 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3149 return -ENOENT;
3150 }
3151
3152 if (s->control_pid > 0)
3153 if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0)
3154 r = -errno;
3155
3156 if (s->main_pid > 0)
3157 if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0)
3158 r = -errno;
3159
3160 if (mode == KILL_CONTROL_GROUP) {
3161 int q;
3162
3163 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3164 return -ENOMEM;
3165
3166 /* Exclude the control/main pid from being killed via the cgroup */
3167 if (s->control_pid > 0)
3168 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3169 r = q;
3170 goto finish;
3171 }
3172
3173 if (s->main_pid > 0)
3174 if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3175 r = q;
3176 goto finish;
3177 }
3178
3179 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, pid_set)) < 0)
3180 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3181 r = q;
3182 }
3183
3184 finish:
3185 if (pid_set)
3186 set_free(pid_set);
3187
3188 return r;
3189 }
3190
3191 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3192 [SERVICE_DEAD] = "dead",
3193 [SERVICE_START_PRE] = "start-pre",
3194 [SERVICE_START] = "start",
3195 [SERVICE_START_POST] = "start-post",
3196 [SERVICE_RUNNING] = "running",
3197 [SERVICE_EXITED] = "exited",
3198 [SERVICE_RELOAD] = "reload",
3199 [SERVICE_STOP] = "stop",
3200 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3201 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3202 [SERVICE_STOP_POST] = "stop-post",
3203 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3204 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3205 [SERVICE_FAILED] = "failed",
3206 [SERVICE_AUTO_RESTART] = "auto-restart",
3207 };
3208
3209 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3210
3211 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3212 [SERVICE_RESTART_NO] = "no",
3213 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3214 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3215 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3216 [SERVICE_RESTART_ALWAYS] = "always"
3217 };
3218
3219 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3220
3221 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3222 [SERVICE_SIMPLE] = "simple",
3223 [SERVICE_FORKING] = "forking",
3224 [SERVICE_ONESHOT] = "oneshot",
3225 [SERVICE_DBUS] = "dbus",
3226 [SERVICE_NOTIFY] = "notify"
3227 };
3228
3229 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3230
3231 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3232 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3233 [SERVICE_EXEC_START] = "ExecStart",
3234 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3235 [SERVICE_EXEC_RELOAD] = "ExecReload",
3236 [SERVICE_EXEC_STOP] = "ExecStop",
3237 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3238 };
3239
3240 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3241
3242 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3243 [NOTIFY_NONE] = "none",
3244 [NOTIFY_MAIN] = "main",
3245 [NOTIFY_ALL] = "all"
3246 };
3247
3248 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3249
3250 const UnitVTable service_vtable = {
3251 .suffix = ".service",
3252 .show_status = true,
3253
3254 .init = service_init,
3255 .done = service_done,
3256 .load = service_load,
3257
3258 .coldplug = service_coldplug,
3259
3260 .dump = service_dump,
3261
3262 .start = service_start,
3263 .stop = service_stop,
3264 .reload = service_reload,
3265
3266 .can_reload = service_can_reload,
3267
3268 .kill = service_kill,
3269
3270 .serialize = service_serialize,
3271 .deserialize_item = service_deserialize_item,
3272
3273 .active_state = service_active_state,
3274 .sub_state_to_string = service_sub_state_to_string,
3275
3276 #ifdef HAVE_SYSV_COMPAT
3277 .check_gc = service_check_gc,
3278 #endif
3279 .check_snapshot = service_check_snapshot,
3280
3281 .sigchld_event = service_sigchld_event,
3282 .timer_event = service_timer_event,
3283
3284 .reset_failed = service_reset_failed,
3285
3286 .cgroup_notify_empty = service_cgroup_notify_event,
3287 .notify_message = service_notify_message,
3288
3289 .bus_name_owner_change = service_bus_name_owner_change,
3290 .bus_query_pid_done = service_bus_query_pid_done,
3291
3292 .bus_interface = "org.freedesktop.systemd1.Service",
3293 .bus_message_handler = bus_service_message_handler,
3294 .bus_invalidating_properties = bus_service_invalidating_properties,
3295
3296 #ifdef HAVE_SYSV_COMPAT
3297 .enumerate = service_enumerate
3298 #endif
3299 };
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