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service: never clean up a service that still has a process in it
[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 #include "exit-status.h"
38
39 #define COMMENTS "#;\n"
40 #define NEWLINES "\n\r"
41
42 #ifdef HAVE_SYSV_COMPAT
43
44 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
45
46 typedef enum RunlevelType {
47 RUNLEVEL_UP,
48 RUNLEVEL_DOWN,
49 RUNLEVEL_SYSINIT
50 } RunlevelType;
51
52 static const struct {
53 const char *path;
54 const char *target;
55 const RunlevelType type;
56 } rcnd_table[] = {
57 /* Standard SysV runlevels for start-up */
58 { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP },
59 { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
60 { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
61 { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
62 { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
63
64 #ifdef TARGET_SUSE
65 /* SUSE style boot.d */
66 { "boot.d", SPECIAL_SYSINIT_TARGET, RUNLEVEL_SYSINIT },
67 #endif
68
69 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_FRUGALWARE)
70 /* Debian style rcS.d */
71 { "rcS.d", SPECIAL_SYSINIT_TARGET, RUNLEVEL_SYSINIT },
72 #endif
73
74 /* Standard SysV runlevels for shutdown */
75 { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN },
76 { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }
77
78 /* Note that the order here matters, as we read the
79 directories in this order, and we want to make sure that
80 sysv_start_priority is known when we first load the
81 unit. And that value we only know from S links. Hence
82 UP/SYSINIT must be read before DOWN */
83 };
84
85 #define RUNLEVELS_UP "12345"
86 /* #define RUNLEVELS_DOWN "06" */
87 /* #define RUNLEVELS_BOOT "bBsS" */
88 #endif
89
90 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
91 [SERVICE_DEAD] = UNIT_INACTIVE,
92 [SERVICE_START_PRE] = UNIT_ACTIVATING,
93 [SERVICE_START] = UNIT_ACTIVATING,
94 [SERVICE_START_POST] = UNIT_ACTIVATING,
95 [SERVICE_RUNNING] = UNIT_ACTIVE,
96 [SERVICE_EXITED] = UNIT_ACTIVE,
97 [SERVICE_RELOAD] = UNIT_RELOADING,
98 [SERVICE_STOP] = UNIT_DEACTIVATING,
99 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
100 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
101 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
102 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
103 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
104 [SERVICE_FAILED] = UNIT_FAILED,
105 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
106 };
107
108 static void service_init(Unit *u) {
109 Service *s = SERVICE(u);
110
111 assert(u);
112 assert(u->meta.load_state == UNIT_STUB);
113
114 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
115 s->restart_usec = DEFAULT_RESTART_USEC;
116 s->timer_watch.type = WATCH_INVALID;
117 #ifdef HAVE_SYSV_COMPAT
118 s->sysv_start_priority = -1;
119 #endif
120 s->socket_fd = -1;
121 s->guess_main_pid = true;
122
123 exec_context_init(&s->exec_context);
124 s->exec_context.std_output = u->meta.manager->default_std_output;
125 s->exec_context.std_error = u->meta.manager->default_std_error;
126
127 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
128
129 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
130 }
131
132 static void service_unwatch_control_pid(Service *s) {
133 assert(s);
134
135 if (s->control_pid <= 0)
136 return;
137
138 unit_unwatch_pid(UNIT(s), s->control_pid);
139 s->control_pid = 0;
140 }
141
142 static void service_unwatch_main_pid(Service *s) {
143 assert(s);
144
145 if (s->main_pid <= 0)
146 return;
147
148 unit_unwatch_pid(UNIT(s), s->main_pid);
149 s->main_pid = 0;
150 }
151
152 static int service_set_main_pid(Service *s, pid_t pid) {
153 pid_t ppid;
154
155 assert(s);
156
157 if (pid <= 1)
158 return -EINVAL;
159
160 if (pid == getpid())
161 return -EINVAL;
162
163 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
164 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
165 s->meta.id, (unsigned long) pid);
166
167 s->main_pid = pid;
168 s->main_pid_known = true;
169
170 exec_status_start(&s->main_exec_status, pid);
171
172 return 0;
173 }
174
175 static void service_close_socket_fd(Service *s) {
176 assert(s);
177
178 if (s->socket_fd < 0)
179 return;
180
181 close_nointr_nofail(s->socket_fd);
182 s->socket_fd = -1;
183 }
184
185 static void service_connection_unref(Service *s) {
186 assert(s);
187
188 if (!s->accept_socket)
189 return;
190
191 socket_connection_unref(s->accept_socket);
192 s->accept_socket = NULL;
193 }
194
195 static void service_done(Unit *u) {
196 Service *s = SERVICE(u);
197
198 assert(s);
199
200 free(s->pid_file);
201 s->pid_file = NULL;
202
203 #ifdef HAVE_SYSV_COMPAT
204 free(s->sysv_path);
205 s->sysv_path = NULL;
206
207 free(s->sysv_runlevels);
208 s->sysv_runlevels = NULL;
209 #endif
210
211 free(s->status_text);
212 s->status_text = NULL;
213
214 exec_context_done(&s->exec_context);
215 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
216 s->control_command = NULL;
217 s->main_command = NULL;
218
219 /* This will leak a process, but at least no memory or any of
220 * our resources */
221 service_unwatch_main_pid(s);
222 service_unwatch_control_pid(s);
223
224 if (s->bus_name) {
225 unit_unwatch_bus_name(UNIT(u), s->bus_name);
226 free(s->bus_name);
227 s->bus_name = NULL;
228 }
229
230 service_close_socket_fd(s);
231 service_connection_unref(s);
232
233 set_free(s->configured_sockets);
234
235 unit_unwatch_timer(u, &s->timer_watch);
236 }
237
238 #ifdef HAVE_SYSV_COMPAT
239 static char *sysv_translate_name(const char *name) {
240 char *r;
241
242 if (!(r = new(char, strlen(name) + sizeof(".service"))))
243 return NULL;
244
245 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
246 if (endswith(name, ".sh"))
247 /* Drop Debian-style .sh suffix */
248 strcpy(stpcpy(r, name) - 3, ".service");
249 #endif
250 #ifdef TARGET_SUSE
251 if (startswith(name, "boot."))
252 /* Drop SuSE-style boot. prefix */
253 strcpy(stpcpy(r, name + 5), ".service");
254 #endif
255 #ifdef TARGET_FRUGALWARE
256 if (startswith(name, "rc."))
257 /* Drop Frugalware-style rc. prefix */
258 strcpy(stpcpy(r, name + 3), ".service");
259 #endif
260 else
261 /* Normal init scripts */
262 strcpy(stpcpy(r, name), ".service");
263
264 return r;
265 }
266
267 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
268
269 /* We silently ignore the $ prefix here. According to the LSB
270 * spec it simply indicates whether something is a
271 * standardized name or a distribution-specific one. Since we
272 * just follow what already exists and do not introduce new
273 * uses or names we don't care who introduced a new name. */
274
275 static const char * const table[] = {
276 /* LSB defined facilities */
277 "local_fs", SPECIAL_LOCAL_FS_TARGET,
278 "network", SPECIAL_NETWORK_TARGET,
279 "named", SPECIAL_NSS_LOOKUP_TARGET,
280 "portmap", SPECIAL_RPCBIND_TARGET,
281 "remote_fs", SPECIAL_REMOTE_FS_TARGET,
282 "syslog", SPECIAL_SYSLOG_TARGET,
283 "time", SPECIAL_RTC_SET_TARGET,
284
285 /* common extensions */
286 "mail-transfer-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
287 "x-display-manager", SPECIAL_DISPLAY_MANAGER_SERVICE,
288 "null", NULL,
289
290 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
291 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
292 #endif
293
294 #ifdef TARGET_FEDORA
295 "MTA", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
296 "smtpdaemon", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
297 "httpd", SPECIAL_HTTP_DAEMON_TARGET,
298 #endif
299
300 #ifdef TARGET_SUSE
301 "smtp", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
302 #endif
303 };
304
305 unsigned i;
306 char *r;
307 const char *n;
308
309 assert(name);
310 assert(_r);
311
312 n = *name == '$' ? name + 1 : name;
313
314 for (i = 0; i < ELEMENTSOF(table); i += 2) {
315
316 if (!streq(table[i], n))
317 continue;
318
319 if (!table[i+1])
320 return 0;
321
322 if (!(r = strdup(table[i+1])))
323 return -ENOMEM;
324
325 goto finish;
326 }
327
328 /* If we don't know this name, fallback heuristics to figure
329 * out whether something is a target or a service alias. */
330
331 if (*name == '$') {
332 if (!unit_prefix_is_valid(n))
333 return -EINVAL;
334
335 /* Facilities starting with $ are most likely targets */
336 r = unit_name_build(n, NULL, ".target");
337 } else if (filename && streq(name, filename))
338 /* Names equalling the file name of the services are redundant */
339 return 0;
340 else
341 /* Everything else we assume to be normal service names */
342 r = sysv_translate_name(n);
343
344 if (!r)
345 return -ENOMEM;
346
347 finish:
348
349 if (_r)
350 *_r = r;
351
352 return 1;
353 }
354
355 static int sysv_fix_order(Service *s) {
356 Meta *other;
357 int r;
358
359 assert(s);
360
361 if (s->sysv_start_priority < 0)
362 return 0;
363
364 /* For each pair of services where at least one lacks a LSB
365 * header, we use the start priority value to order things. */
366
367 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
368 Service *t;
369 UnitDependency d;
370 bool special_s, special_t;
371
372 t = (Service*) other;
373
374 if (s == t)
375 continue;
376
377 if (t->meta.load_state != UNIT_LOADED)
378 continue;
379
380 if (t->sysv_start_priority < 0)
381 continue;
382
383 /* If both units have modern headers we don't care
384 * about the priorities */
385 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
386 (t->meta.fragment_path || t->sysv_has_lsb))
387 continue;
388
389 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
390 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
391
392 if (special_t && !special_s)
393 d = UNIT_AFTER;
394 else if (special_s && !special_t)
395 d = UNIT_BEFORE;
396 else if (t->sysv_start_priority < s->sysv_start_priority)
397 d = UNIT_AFTER;
398 else if (t->sysv_start_priority > s->sysv_start_priority)
399 d = UNIT_BEFORE;
400 else
401 continue;
402
403 /* FIXME: Maybe we should compare the name here lexicographically? */
404
405 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
406 return r;
407 }
408
409 return 0;
410 }
411
412 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
413 ExecCommand *c;
414
415 if (!(c = new0(ExecCommand, 1)))
416 return NULL;
417
418 if (!(c->path = strdup(path))) {
419 free(c);
420 return NULL;
421 }
422
423 if (!(c->argv = strv_new(path, arg1, NULL))) {
424 free(c->path);
425 free(c);
426 return NULL;
427 }
428
429 return c;
430 }
431
432 static int sysv_exec_commands(Service *s) {
433 ExecCommand *c;
434
435 assert(s);
436 assert(s->sysv_path);
437
438 if (!(c = exec_command_new(s->sysv_path, "start")))
439 return -ENOMEM;
440 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
441
442 if (!(c = exec_command_new(s->sysv_path, "stop")))
443 return -ENOMEM;
444 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
445
446 if (!(c = exec_command_new(s->sysv_path, "reload")))
447 return -ENOMEM;
448 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
449
450 return 0;
451 }
452
453 static int service_load_sysv_path(Service *s, const char *path) {
454 FILE *f;
455 Unit *u;
456 unsigned line = 0;
457 int r;
458 enum {
459 NORMAL,
460 DESCRIPTION,
461 LSB,
462 LSB_DESCRIPTION
463 } state = NORMAL;
464 char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
465
466 assert(s);
467 assert(path);
468
469 u = UNIT(s);
470
471 if (!(f = fopen(path, "re"))) {
472 r = errno == ENOENT ? 0 : -errno;
473 goto finish;
474 }
475
476 free(s->sysv_path);
477 if (!(s->sysv_path = strdup(path))) {
478 r = -ENOMEM;
479 goto finish;
480 }
481
482 while (!feof(f)) {
483 char l[LINE_MAX], *t;
484
485 if (!fgets(l, sizeof(l), f)) {
486 if (feof(f))
487 break;
488
489 r = -errno;
490 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
491 goto finish;
492 }
493
494 line++;
495
496 t = strstrip(l);
497 if (*t != '#')
498 continue;
499
500 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
501 state = LSB;
502 s->sysv_has_lsb = true;
503 continue;
504 }
505
506 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
507 state = NORMAL;
508 continue;
509 }
510
511 t++;
512 t += strspn(t, WHITESPACE);
513
514 if (state == NORMAL) {
515
516 /* Try to parse Red Hat style chkconfig headers */
517
518 if (startswith_no_case(t, "chkconfig:")) {
519 int start_priority;
520 char runlevels[16], *k;
521
522 state = NORMAL;
523
524 if (sscanf(t+10, "%15s %i %*i",
525 runlevels,
526 &start_priority) != 2) {
527
528 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
529 continue;
530 }
531
532 /* A start priority gathered from the
533 * symlink farms is preferred over the
534 * data from the LSB header. */
535 if (start_priority < 0 || start_priority > 99)
536 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
537 else if (s->sysv_start_priority < 0)
538 s->sysv_start_priority = start_priority;
539
540 char_array_0(runlevels);
541 k = delete_chars(runlevels, WHITESPACE "-");
542
543 if (k[0]) {
544 char *d;
545
546 if (!(d = strdup(k))) {
547 r = -ENOMEM;
548 goto finish;
549 }
550
551 free(s->sysv_runlevels);
552 s->sysv_runlevels = d;
553 }
554
555 } else if (startswith_no_case(t, "description:")) {
556
557 size_t k = strlen(t);
558 char *d;
559 const char *j;
560
561 if (t[k-1] == '\\') {
562 state = DESCRIPTION;
563 t[k-1] = 0;
564 }
565
566 if ((j = strstrip(t+12)) && *j) {
567 if (!(d = strdup(j))) {
568 r = -ENOMEM;
569 goto finish;
570 }
571 } else
572 d = NULL;
573
574 free(chkconfig_description);
575 chkconfig_description = d;
576
577 } else if (startswith_no_case(t, "pidfile:")) {
578
579 char *fn;
580
581 state = NORMAL;
582
583 fn = strstrip(t+8);
584 if (!path_is_absolute(fn)) {
585 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
586 continue;
587 }
588
589 if (!(fn = strdup(fn))) {
590 r = -ENOMEM;
591 goto finish;
592 }
593
594 free(s->pid_file);
595 s->pid_file = fn;
596 }
597
598 } else if (state == DESCRIPTION) {
599
600 /* Try to parse Red Hat style description
601 * continuation */
602
603 size_t k = strlen(t);
604 char *j;
605
606 if (t[k-1] == '\\')
607 t[k-1] = 0;
608 else
609 state = NORMAL;
610
611 if ((j = strstrip(t)) && *j) {
612 char *d = NULL;
613
614 if (chkconfig_description)
615 asprintf(&d, "%s %s", chkconfig_description, j);
616 else
617 d = strdup(j);
618
619 if (!d) {
620 r = -ENOMEM;
621 goto finish;
622 }
623
624 free(chkconfig_description);
625 chkconfig_description = d;
626 }
627
628 } else if (state == LSB || state == LSB_DESCRIPTION) {
629
630 if (startswith_no_case(t, "Provides:")) {
631 char *i, *w;
632 size_t z;
633
634 state = LSB;
635
636 FOREACH_WORD_QUOTED(w, z, t+9, i) {
637 char *n, *m;
638
639 if (!(n = strndup(w, z))) {
640 r = -ENOMEM;
641 goto finish;
642 }
643
644 r = sysv_translate_facility(n, file_name_from_path(path), &m);
645 free(n);
646
647 if (r < 0)
648 goto finish;
649
650 if (r == 0)
651 continue;
652
653 if (unit_name_to_type(m) == UNIT_SERVICE)
654 r = unit_add_name(u, m);
655 else {
656 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
657
658 if (s->sysv_enabled) {
659 int k;
660
661 if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
662 r = k;
663 }
664 }
665
666 if (r < 0)
667 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
668
669 free(m);
670 }
671
672 } else if (startswith_no_case(t, "Required-Start:") ||
673 startswith_no_case(t, "Should-Start:") ||
674 startswith_no_case(t, "X-Start-Before:") ||
675 startswith_no_case(t, "X-Start-After:")) {
676 char *i, *w;
677 size_t z;
678
679 state = LSB;
680
681 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
682 char *n, *m;
683
684 if (!(n = strndup(w, z))) {
685 r = -ENOMEM;
686 goto finish;
687 }
688
689 r = sysv_translate_facility(n, file_name_from_path(path), &m);
690
691 if (r < 0) {
692 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
693 free(n);
694 continue;
695 }
696
697 free(n);
698
699 if (r == 0)
700 continue;
701
702 r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
703
704 if (r < 0)
705 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
706
707 free(m);
708 }
709 } else if (startswith_no_case(t, "Default-Start:")) {
710 char *k, *d;
711
712 state = LSB;
713
714 k = delete_chars(t+14, WHITESPACE "-");
715
716 if (k[0] != 0) {
717 if (!(d = strdup(k))) {
718 r = -ENOMEM;
719 goto finish;
720 }
721
722 free(s->sysv_runlevels);
723 s->sysv_runlevels = d;
724 }
725
726 } else if (startswith_no_case(t, "Description:")) {
727 char *d, *j;
728
729 state = LSB_DESCRIPTION;
730
731 if ((j = strstrip(t+12)) && *j) {
732 if (!(d = strdup(j))) {
733 r = -ENOMEM;
734 goto finish;
735 }
736 } else
737 d = NULL;
738
739 free(long_description);
740 long_description = d;
741
742 } else if (startswith_no_case(t, "Short-Description:")) {
743 char *d, *j;
744
745 state = LSB;
746
747 if ((j = strstrip(t+18)) && *j) {
748 if (!(d = strdup(j))) {
749 r = -ENOMEM;
750 goto finish;
751 }
752 } else
753 d = NULL;
754
755 free(short_description);
756 short_description = d;
757
758 } else if (startswith_no_case(t, "X-Interactive:")) {
759 int b;
760
761 if ((b = parse_boolean(strstrip(t+14))) < 0) {
762 log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
763 continue;
764 }
765
766 if (b)
767 s->exec_context.std_input = EXEC_INPUT_TTY;
768 else
769 s->exec_context.std_input = EXEC_INPUT_NULL;
770
771 } else if (state == LSB_DESCRIPTION) {
772
773 if (startswith(l, "#\t") || startswith(l, "# ")) {
774 char *j;
775
776 if ((j = strstrip(t)) && *j) {
777 char *d = NULL;
778
779 if (long_description)
780 asprintf(&d, "%s %s", long_description, t);
781 else
782 d = strdup(j);
783
784 if (!d) {
785 r = -ENOMEM;
786 goto finish;
787 }
788
789 free(long_description);
790 long_description = d;
791 }
792
793 } else
794 state = LSB;
795 }
796 }
797 }
798
799 if ((r = sysv_exec_commands(s)) < 0)
800 goto finish;
801
802 if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
803 /* If there a runlevels configured for this service
804 * but none of the standard ones, then we assume this
805 * is some special kind of service (which might be
806 * needed for early boot) and don't create any links
807 * to it. */
808
809 s->meta.default_dependencies = false;
810
811 /* Don't timeout special services during boot (like fsck) */
812 s->timeout_usec = 0;
813 } else
814 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
815
816 /* Special setting for all SysV services */
817 s->type = SERVICE_FORKING;
818 s->remain_after_exit = true;
819 s->restart = SERVICE_RESTART_NO;
820 s->exec_context.std_output =
821 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
822 ? EXEC_OUTPUT_TTY : s->meta.manager->default_std_output;
823 s->exec_context.kill_mode = KILL_PROCESS_GROUP;
824
825 /* We use the long description only if
826 * no short description is set. */
827
828 if (short_description)
829 description = short_description;
830 else if (chkconfig_description)
831 description = chkconfig_description;
832 else if (long_description)
833 description = long_description;
834 else
835 description = NULL;
836
837 if (description) {
838 char *d;
839
840 if (!(d = strappend("LSB: ", description))) {
841 r = -ENOMEM;
842 goto finish;
843 }
844
845 u->meta.description = d;
846 }
847
848 u->meta.load_state = UNIT_LOADED;
849 r = 0;
850
851 finish:
852
853 if (f)
854 fclose(f);
855
856 free(short_description);
857 free(long_description);
858 free(chkconfig_description);
859
860 return r;
861 }
862
863 static int service_load_sysv_name(Service *s, const char *name) {
864 char **p;
865
866 assert(s);
867 assert(name);
868
869 /* For SysV services we strip the boot.*, rc.* and *.sh
870 * prefixes/suffixes. */
871 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
872 if (endswith(name, ".sh.service"))
873 return -ENOENT;
874 #endif
875
876 #ifdef TARGET_SUSE
877 if (startswith(name, "boot."))
878 return -ENOENT;
879 #endif
880
881 #ifdef TARGET_FRUGALWARE
882 if (startswith(name, "rc."))
883 return -ENOENT;
884 #endif
885
886 STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
887 char *path;
888 int r;
889
890 if (asprintf(&path, "%s/%s", *p, name) < 0)
891 return -ENOMEM;
892
893 assert(endswith(path, ".service"));
894 path[strlen(path)-8] = 0;
895
896 r = service_load_sysv_path(s, path);
897
898 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
899 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
900 /* Try Debian style *.sh source'able init scripts */
901 strcat(path, ".sh");
902 r = service_load_sysv_path(s, path);
903 }
904 #endif
905 free(path);
906
907 #ifdef TARGET_SUSE
908 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
909 /* Try SUSE style boot.* init scripts */
910
911 if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
912 return -ENOMEM;
913
914 /* Drop .service suffix */
915 path[strlen(path)-8] = 0;
916 r = service_load_sysv_path(s, path);
917 free(path);
918 }
919 #endif
920
921 #ifdef TARGET_FRUGALWARE
922 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
923 /* Try Frugalware style rc.* init scripts */
924
925 if (asprintf(&path, "%s/rc.%s", *p, name) < 0)
926 return -ENOMEM;
927
928 /* Drop .service suffix */
929 path[strlen(path)-8] = 0;
930 r = service_load_sysv_path(s, path);
931 free(path);
932 }
933 #endif
934
935 if (r < 0)
936 return r;
937
938 if ((s->meta.load_state != UNIT_STUB))
939 break;
940 }
941
942 return 0;
943 }
944
945 static int service_load_sysv(Service *s) {
946 const char *t;
947 Iterator i;
948 int r;
949
950 assert(s);
951
952 /* Load service data from SysV init scripts, preferably with
953 * LSB headers ... */
954
955 if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
956 return 0;
957
958 if ((t = s->meta.id))
959 if ((r = service_load_sysv_name(s, t)) < 0)
960 return r;
961
962 if (s->meta.load_state == UNIT_STUB)
963 SET_FOREACH(t, s->meta.names, i) {
964 if (t == s->meta.id)
965 continue;
966
967 if ((r = service_load_sysv_name(s, t)) < 0)
968 return r;
969
970 if (s->meta.load_state != UNIT_STUB)
971 break;
972 }
973
974 return 0;
975 }
976 #endif
977
978 static int fsck_fix_order(Service *s) {
979 Meta *other;
980 int r;
981
982 assert(s);
983
984 if (s->fsck_passno <= 0)
985 return 0;
986
987 /* For each pair of services where both have an fsck priority
988 * we order things based on it. */
989
990 LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
991 Service *t;
992 UnitDependency d;
993
994 t = (Service*) other;
995
996 if (s == t)
997 continue;
998
999 if (t->meta.load_state != UNIT_LOADED)
1000 continue;
1001
1002 if (t->fsck_passno <= 0)
1003 continue;
1004
1005 if (t->fsck_passno < s->fsck_passno)
1006 d = UNIT_AFTER;
1007 else if (t->fsck_passno > s->fsck_passno)
1008 d = UNIT_BEFORE;
1009 else
1010 continue;
1011
1012 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1013 return r;
1014 }
1015
1016 return 0;
1017 }
1018
1019 static int service_verify(Service *s) {
1020 assert(s);
1021
1022 if (s->meta.load_state != UNIT_LOADED)
1023 return 0;
1024
1025 if (!s->exec_command[SERVICE_EXEC_START]) {
1026 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1027 return -EINVAL;
1028 }
1029
1030 if (s->type != SERVICE_ONESHOT &&
1031 s->exec_command[SERVICE_EXEC_START]->command_next) {
1032 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1033 return -EINVAL;
1034 }
1035
1036 if (s->type == SERVICE_ONESHOT &&
1037 s->exec_command[SERVICE_EXEC_RELOAD]) {
1038 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", s->meta.id);
1039 return -EINVAL;
1040 }
1041
1042 if (s->type == SERVICE_DBUS && !s->bus_name) {
1043 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1044 return -EINVAL;
1045 }
1046
1047 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1048 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1049 return -EINVAL;
1050 }
1051
1052 return 0;
1053 }
1054
1055 static int service_add_default_dependencies(Service *s) {
1056 int r;
1057
1058 assert(s);
1059
1060 /* Add a number of automatic dependencies useful for the
1061 * majority of services. */
1062
1063 /* First, pull in base system */
1064 if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1065
1066 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1067 return r;
1068
1069 } else if (s->meta.manager->running_as == MANAGER_USER) {
1070
1071 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1072 return r;
1073 }
1074
1075 /* Second, activate normal shutdown */
1076 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1077 }
1078
1079 static int service_load(Unit *u) {
1080 int r;
1081 Service *s = SERVICE(u);
1082
1083 assert(s);
1084
1085 /* Load a .service file */
1086 if ((r = unit_load_fragment(u)) < 0)
1087 return r;
1088
1089 #ifdef HAVE_SYSV_COMPAT
1090 /* Load a classic init script as a fallback, if we couldn't find anything */
1091 if (u->meta.load_state == UNIT_STUB)
1092 if ((r = service_load_sysv(s)) < 0)
1093 return r;
1094 #endif
1095
1096 /* Still nothing found? Then let's give up */
1097 if (u->meta.load_state == UNIT_STUB)
1098 return -ENOENT;
1099
1100 /* We were able to load something, then let's add in the
1101 * dropin directories. */
1102 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1103 return r;
1104
1105 /* This is a new unit? Then let's add in some extras */
1106 if (u->meta.load_state == UNIT_LOADED) {
1107 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1108 return r;
1109
1110 if ((r = unit_add_default_cgroups(u)) < 0)
1111 return r;
1112
1113 #ifdef HAVE_SYSV_COMPAT
1114 if ((r = sysv_fix_order(s)) < 0)
1115 return r;
1116 #endif
1117
1118 if ((r = fsck_fix_order(s)) < 0)
1119 return r;
1120
1121 if (s->bus_name)
1122 if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1123 return r;
1124
1125 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1126 s->notify_access = NOTIFY_MAIN;
1127
1128 if (s->type == SERVICE_DBUS || s->bus_name)
1129 if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1130 return r;
1131
1132 if (s->meta.default_dependencies)
1133 if ((r = service_add_default_dependencies(s)) < 0)
1134 return r;
1135 }
1136
1137 return service_verify(s);
1138 }
1139
1140 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1141
1142 ServiceExecCommand c;
1143 Service *s = SERVICE(u);
1144 const char *prefix2;
1145 char *p2;
1146
1147 assert(s);
1148
1149 p2 = strappend(prefix, "\t");
1150 prefix2 = p2 ? p2 : prefix;
1151
1152 fprintf(f,
1153 "%sService State: %s\n"
1154 "%sPermissionsStartOnly: %s\n"
1155 "%sRootDirectoryStartOnly: %s\n"
1156 "%sRemainAfterExit: %s\n"
1157 "%sGuessMainPID: %s\n"
1158 "%sType: %s\n"
1159 "%sRestart: %s\n"
1160 "%sNotifyAccess: %s\n",
1161 prefix, service_state_to_string(s->state),
1162 prefix, yes_no(s->permissions_start_only),
1163 prefix, yes_no(s->root_directory_start_only),
1164 prefix, yes_no(s->remain_after_exit),
1165 prefix, yes_no(s->guess_main_pid),
1166 prefix, service_type_to_string(s->type),
1167 prefix, service_restart_to_string(s->restart),
1168 prefix, notify_access_to_string(s->notify_access));
1169
1170 if (s->control_pid > 0)
1171 fprintf(f,
1172 "%sControl PID: %lu\n",
1173 prefix, (unsigned long) s->control_pid);
1174
1175 if (s->main_pid > 0)
1176 fprintf(f,
1177 "%sMain PID: %lu\n",
1178 prefix, (unsigned long) s->main_pid);
1179
1180 if (s->pid_file)
1181 fprintf(f,
1182 "%sPIDFile: %s\n",
1183 prefix, s->pid_file);
1184
1185 if (s->bus_name)
1186 fprintf(f,
1187 "%sBusName: %s\n"
1188 "%sBus Name Good: %s\n",
1189 prefix, s->bus_name,
1190 prefix, yes_no(s->bus_name_good));
1191
1192 exec_context_dump(&s->exec_context, f, prefix);
1193
1194 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1195
1196 if (!s->exec_command[c])
1197 continue;
1198
1199 fprintf(f, "%s-> %s:\n",
1200 prefix, service_exec_command_to_string(c));
1201
1202 exec_command_dump_list(s->exec_command[c], f, prefix2);
1203 }
1204
1205 #ifdef HAVE_SYSV_COMPAT
1206 if (s->sysv_path)
1207 fprintf(f,
1208 "%sSysV Init Script Path: %s\n"
1209 "%sSysV Init Script has LSB Header: %s\n"
1210 "%sSysVEnabled: %s\n",
1211 prefix, s->sysv_path,
1212 prefix, yes_no(s->sysv_has_lsb),
1213 prefix, yes_no(s->sysv_enabled));
1214
1215 if (s->sysv_start_priority >= 0)
1216 fprintf(f,
1217 "%sSysVStartPriority: %i\n",
1218 prefix, s->sysv_start_priority);
1219
1220 if (s->sysv_runlevels)
1221 fprintf(f, "%sSysVRunLevels: %s\n",
1222 prefix, s->sysv_runlevels);
1223 #endif
1224
1225 if (s->fsck_passno > 0)
1226 fprintf(f,
1227 "%sFsckPassNo: %i\n",
1228 prefix, s->fsck_passno);
1229
1230 if (s->status_text)
1231 fprintf(f, "%sStatus Text: %s\n",
1232 prefix, s->status_text);
1233
1234 free(p2);
1235 }
1236
1237 static int service_load_pid_file(Service *s) {
1238 char *k;
1239 int r;
1240 pid_t pid;
1241
1242 assert(s);
1243
1244 if (!s->pid_file)
1245 return -ENOENT;
1246
1247 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1248 return r;
1249
1250 r = parse_pid(k, &pid);
1251 free(k);
1252
1253 if (r < 0)
1254 return r;
1255
1256 if (kill(pid, 0) < 0 && errno != EPERM) {
1257 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1258 (unsigned long) pid, s->pid_file);
1259 return -ESRCH;
1260 }
1261
1262 if ((r = service_set_main_pid(s, pid)) < 0)
1263 return r;
1264
1265 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1266 /* FIXME: we need to do something here */
1267 return r;
1268
1269 return 0;
1270 }
1271
1272 static int service_search_main_pid(Service *s) {
1273 pid_t pid;
1274 int r;
1275
1276 assert(s);
1277
1278 /* If we know it anyway, don't ever fallback to unreliable
1279 * heuristics */
1280 if (s->main_pid_known)
1281 return 0;
1282
1283 if (!s->guess_main_pid)
1284 return 0;
1285
1286 assert(s->main_pid <= 0);
1287
1288 if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1289 return -ENOENT;
1290
1291 if ((r = service_set_main_pid(s, pid)) < 0)
1292 return r;
1293
1294 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1295 /* FIXME: we need to do something here */
1296 return r;
1297
1298 return 0;
1299 }
1300
1301 static int service_get_sockets(Service *s, Set **_set) {
1302 Set *set;
1303 Iterator i;
1304 char *t;
1305 int r;
1306
1307 assert(s);
1308 assert(_set);
1309
1310 if (s->socket_fd >= 0)
1311 return 0;
1312
1313 if (!set_isempty(s->configured_sockets))
1314 return 0;
1315
1316 /* Collects all Socket objects that belong to this
1317 * service. Note that a service might have multiple sockets
1318 * via multiple names. */
1319
1320 if (!(set = set_new(NULL, NULL)))
1321 return -ENOMEM;
1322
1323 SET_FOREACH(t, s->meta.names, i) {
1324 char *k;
1325 Unit *p;
1326
1327 /* Look for all socket objects that go by any of our
1328 * units and collect their fds */
1329
1330 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1331 r = -ENOMEM;
1332 goto fail;
1333 }
1334
1335 p = manager_get_unit(s->meta.manager, k);
1336 free(k);
1337
1338 if (!p)
1339 continue;
1340
1341 if ((r = set_put(set, p)) < 0)
1342 goto fail;
1343 }
1344
1345 *_set = set;
1346 return 0;
1347
1348 fail:
1349 set_free(set);
1350 return r;
1351 }
1352
1353 static int service_notify_sockets_dead(Service *s) {
1354 Iterator i;
1355 Set *set, *free_set = NULL;
1356 Socket *sock;
1357 int r;
1358
1359 assert(s);
1360
1361 /* Notifies all our sockets when we die */
1362
1363 if (s->socket_fd >= 0)
1364 return 0;
1365
1366 if (!set_isempty(s->configured_sockets))
1367 set = s->configured_sockets;
1368 else {
1369 if ((r = service_get_sockets(s, &free_set)) < 0)
1370 return r;
1371
1372 set = free_set;
1373 }
1374
1375 SET_FOREACH(sock, set, i)
1376 socket_notify_service_dead(sock);
1377
1378 set_free(free_set);
1379
1380 return 0;
1381 }
1382
1383 static void service_set_state(Service *s, ServiceState state) {
1384 ServiceState old_state;
1385 assert(s);
1386
1387 old_state = s->state;
1388 s->state = state;
1389
1390 if (state != SERVICE_START_PRE &&
1391 state != SERVICE_START &&
1392 state != SERVICE_START_POST &&
1393 state != SERVICE_RELOAD &&
1394 state != SERVICE_STOP &&
1395 state != SERVICE_STOP_SIGTERM &&
1396 state != SERVICE_STOP_SIGKILL &&
1397 state != SERVICE_STOP_POST &&
1398 state != SERVICE_FINAL_SIGTERM &&
1399 state != SERVICE_FINAL_SIGKILL &&
1400 state != SERVICE_AUTO_RESTART)
1401 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1402
1403 if (state != SERVICE_START &&
1404 state != SERVICE_START_POST &&
1405 state != SERVICE_RUNNING &&
1406 state != SERVICE_RELOAD &&
1407 state != SERVICE_STOP &&
1408 state != SERVICE_STOP_SIGTERM &&
1409 state != SERVICE_STOP_SIGKILL) {
1410 service_unwatch_main_pid(s);
1411 s->main_command = NULL;
1412 }
1413
1414 if (state != SERVICE_START_PRE &&
1415 state != SERVICE_START &&
1416 state != SERVICE_START_POST &&
1417 state != SERVICE_RELOAD &&
1418 state != SERVICE_STOP &&
1419 state != SERVICE_STOP_SIGTERM &&
1420 state != SERVICE_STOP_SIGKILL &&
1421 state != SERVICE_STOP_POST &&
1422 state != SERVICE_FINAL_SIGTERM &&
1423 state != SERVICE_FINAL_SIGKILL) {
1424 service_unwatch_control_pid(s);
1425 s->control_command = NULL;
1426 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1427 }
1428
1429 if (state == SERVICE_DEAD ||
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_FAILED ||
1437 state == SERVICE_AUTO_RESTART)
1438 service_notify_sockets_dead(s);
1439
1440 if (state != SERVICE_START_PRE &&
1441 state != SERVICE_START &&
1442 state != SERVICE_START_POST &&
1443 state != SERVICE_RUNNING &&
1444 state != SERVICE_RELOAD &&
1445 state != SERVICE_STOP &&
1446 state != SERVICE_STOP_SIGTERM &&
1447 state != SERVICE_STOP_SIGKILL &&
1448 state != SERVICE_STOP_POST &&
1449 state != SERVICE_FINAL_SIGTERM &&
1450 state != SERVICE_FINAL_SIGKILL &&
1451 !(state == SERVICE_DEAD && s->meta.job)) {
1452 service_close_socket_fd(s);
1453 service_connection_unref(s);
1454 }
1455
1456 /* For the inactive states unit_notify() will trim the cgroup,
1457 * but for exit we have to do that ourselves... */
1458 if (state == SERVICE_EXITED)
1459 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1460
1461 if (old_state != state)
1462 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1463
1464 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1465 s->reload_failure = false;
1466 }
1467
1468 static int service_coldplug(Unit *u) {
1469 Service *s = SERVICE(u);
1470 int r;
1471
1472 assert(s);
1473 assert(s->state == SERVICE_DEAD);
1474
1475 if (s->deserialized_state != s->state) {
1476
1477 if (s->deserialized_state == SERVICE_START_PRE ||
1478 s->deserialized_state == SERVICE_START ||
1479 s->deserialized_state == SERVICE_START_POST ||
1480 s->deserialized_state == SERVICE_RELOAD ||
1481 s->deserialized_state == SERVICE_STOP ||
1482 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1483 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1484 s->deserialized_state == SERVICE_STOP_POST ||
1485 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1486 s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1487 s->deserialized_state == SERVICE_AUTO_RESTART) {
1488
1489 if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1490 usec_t k;
1491
1492 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1493
1494 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1495 return r;
1496 }
1497 }
1498
1499 if ((s->deserialized_state == SERVICE_START &&
1500 (s->type == SERVICE_FORKING ||
1501 s->type == SERVICE_DBUS ||
1502 s->type == SERVICE_ONESHOT ||
1503 s->type == SERVICE_NOTIFY)) ||
1504 s->deserialized_state == SERVICE_START_POST ||
1505 s->deserialized_state == SERVICE_RUNNING ||
1506 s->deserialized_state == SERVICE_RELOAD ||
1507 s->deserialized_state == SERVICE_STOP ||
1508 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1509 s->deserialized_state == SERVICE_STOP_SIGKILL)
1510 if (s->main_pid > 0)
1511 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1512 return r;
1513
1514 if (s->deserialized_state == SERVICE_START_PRE ||
1515 s->deserialized_state == SERVICE_START ||
1516 s->deserialized_state == SERVICE_START_POST ||
1517 s->deserialized_state == SERVICE_RELOAD ||
1518 s->deserialized_state == SERVICE_STOP ||
1519 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1520 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1521 s->deserialized_state == SERVICE_STOP_POST ||
1522 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1523 s->deserialized_state == SERVICE_FINAL_SIGKILL)
1524 if (s->control_pid > 0)
1525 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1526 return r;
1527
1528 service_set_state(s, s->deserialized_state);
1529 }
1530
1531 return 0;
1532 }
1533
1534 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1535 Iterator i;
1536 int r;
1537 int *rfds = NULL;
1538 unsigned rn_fds = 0;
1539 Set *set, *free_set = NULL;
1540 Socket *sock;
1541
1542 assert(s);
1543 assert(fds);
1544 assert(n_fds);
1545
1546 if (s->socket_fd >= 0)
1547 return 0;
1548
1549 if (!set_isempty(s->configured_sockets))
1550 set = s->configured_sockets;
1551 else {
1552 if ((r = service_get_sockets(s, &free_set)) < 0)
1553 return r;
1554
1555 set = free_set;
1556 }
1557
1558 SET_FOREACH(sock, set, i) {
1559 int *cfds;
1560 unsigned cn_fds;
1561
1562 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1563 goto fail;
1564
1565 if (!cfds)
1566 continue;
1567
1568 if (!rfds) {
1569 rfds = cfds;
1570 rn_fds = cn_fds;
1571 } else {
1572 int *t;
1573
1574 if (!(t = new(int, rn_fds+cn_fds))) {
1575 free(cfds);
1576 r = -ENOMEM;
1577 goto fail;
1578 }
1579
1580 memcpy(t, rfds, rn_fds);
1581 memcpy(t+rn_fds, cfds, cn_fds);
1582 free(rfds);
1583 free(cfds);
1584
1585 rfds = t;
1586 rn_fds = rn_fds+cn_fds;
1587 }
1588 }
1589
1590 *fds = rfds;
1591 *n_fds = rn_fds;
1592
1593 set_free(free_set);
1594
1595 return 0;
1596
1597 fail:
1598 set_free(set);
1599 free(rfds);
1600
1601 return r;
1602 }
1603
1604 static int service_spawn(
1605 Service *s,
1606 ExecCommand *c,
1607 bool timeout,
1608 bool pass_fds,
1609 bool apply_permissions,
1610 bool apply_chroot,
1611 bool apply_tty_stdin,
1612 bool set_notify_socket,
1613 pid_t *_pid) {
1614
1615 pid_t pid;
1616 int r;
1617 int *fds = NULL, *fdsbuf = NULL;
1618 unsigned n_fds = 0, n_env = 0;
1619 char **argv = NULL, **final_env = NULL, **our_env = NULL;
1620
1621 assert(s);
1622 assert(c);
1623 assert(_pid);
1624
1625 if (pass_fds ||
1626 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1627 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1628 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1629
1630 if (s->socket_fd >= 0) {
1631 fds = &s->socket_fd;
1632 n_fds = 1;
1633 } else {
1634 if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1635 goto fail;
1636
1637 fds = fdsbuf;
1638 }
1639 }
1640
1641 if (timeout && s->timeout_usec) {
1642 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1643 goto fail;
1644 } else
1645 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1646
1647 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1648 r = -ENOMEM;
1649 goto fail;
1650 }
1651
1652 if (!(our_env = new0(char*, 4))) {
1653 r = -ENOMEM;
1654 goto fail;
1655 }
1656
1657 if (set_notify_socket)
1658 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1659 r = -ENOMEM;
1660 goto fail;
1661 }
1662
1663 if (s->main_pid > 0)
1664 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1665 r = -ENOMEM;
1666 goto fail;
1667 }
1668
1669 if (!(final_env = strv_env_merge(2,
1670 s->meta.manager->environment,
1671 our_env,
1672 NULL))) {
1673 r = -ENOMEM;
1674 goto fail;
1675 }
1676
1677 r = exec_spawn(c,
1678 argv,
1679 &s->exec_context,
1680 fds, n_fds,
1681 final_env,
1682 apply_permissions,
1683 apply_chroot,
1684 apply_tty_stdin,
1685 s->meta.manager->confirm_spawn,
1686 s->meta.cgroup_bondings,
1687 &pid);
1688
1689 if (r < 0)
1690 goto fail;
1691
1692
1693 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1694 /* FIXME: we need to do something here */
1695 goto fail;
1696
1697 free(fdsbuf);
1698 strv_free(argv);
1699 strv_free(our_env);
1700 strv_free(final_env);
1701
1702 *_pid = pid;
1703
1704 return 0;
1705
1706 fail:
1707 free(fdsbuf);
1708 strv_free(argv);
1709 strv_free(our_env);
1710 strv_free(final_env);
1711
1712 if (timeout)
1713 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1714
1715 return r;
1716 }
1717
1718 static int main_pid_good(Service *s) {
1719 assert(s);
1720
1721 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1722 * don't know */
1723
1724 /* If we know the pid file, then lets just check if it is
1725 * still valid */
1726 if (s->main_pid_known)
1727 return s->main_pid > 0;
1728
1729 /* We don't know the pid */
1730 return -EAGAIN;
1731 }
1732
1733 static int control_pid_good(Service *s) {
1734 assert(s);
1735
1736 return s->control_pid > 0;
1737 }
1738
1739 static int cgroup_good(Service *s) {
1740 int r;
1741
1742 assert(s);
1743
1744 if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1745 return r;
1746
1747 return !r;
1748 }
1749
1750 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1751 int r;
1752 assert(s);
1753
1754 if (!success)
1755 s->failure = true;
1756
1757 if (allow_restart &&
1758 !s->forbid_restart &&
1759 (s->restart == SERVICE_RESTART_ALWAYS ||
1760 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1761 (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1762 (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1763 (s->main_exec_status.code == CLD_KILLED ||
1764 s->main_exec_status.code == CLD_DUMPED)))) {
1765
1766 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1767 goto fail;
1768
1769 service_set_state(s, SERVICE_AUTO_RESTART);
1770 } else
1771 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1772
1773 s->forbid_restart = false;
1774
1775 return;
1776
1777 fail:
1778 log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1779 service_enter_dead(s, false, false);
1780 }
1781
1782 static void service_enter_signal(Service *s, ServiceState state, bool success);
1783
1784 static void service_enter_stop_post(Service *s, bool success) {
1785 int r;
1786 assert(s);
1787
1788 if (!success)
1789 s->failure = true;
1790
1791 service_unwatch_control_pid(s);
1792
1793 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1794 s->control_command_id = SERVICE_EXEC_STOP_POST;
1795
1796 if ((r = service_spawn(s,
1797 s->control_command,
1798 true,
1799 false,
1800 !s->permissions_start_only,
1801 !s->root_directory_start_only,
1802 true,
1803 false,
1804 &s->control_pid)) < 0)
1805 goto fail;
1806
1807
1808 service_set_state(s, SERVICE_STOP_POST);
1809 } else
1810 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1811
1812 return;
1813
1814 fail:
1815 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1816 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1817 }
1818
1819 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1820 int r;
1821 Set *pid_set = NULL;
1822 bool wait_for_exit = false;
1823
1824 assert(s);
1825
1826 if (!success)
1827 s->failure = true;
1828
1829 if (s->exec_context.kill_mode != KILL_NONE) {
1830 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1831
1832 if (s->main_pid > 0) {
1833 if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1834 -s->main_pid :
1835 s->main_pid, sig) < 0 && errno != ESRCH)
1836
1837 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1838 else
1839 wait_for_exit = true;
1840 }
1841
1842 if (s->control_pid > 0) {
1843 if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1844 -s->control_pid :
1845 s->control_pid, sig) < 0 && errno != ESRCH)
1846
1847 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1848 else
1849 wait_for_exit = true;
1850 }
1851
1852 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1853
1854 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1855 r = -ENOMEM;
1856 goto fail;
1857 }
1858
1859 /* Exclude the main/control pids from being killed via the cgroup */
1860 if (s->main_pid > 0)
1861 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1862 goto fail;
1863
1864 if (s->control_pid > 0)
1865 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1866 goto fail;
1867
1868 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1869 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1870 log_warning("Failed to kill control group: %s", strerror(-r));
1871 } else if (r > 0)
1872 wait_for_exit = true;
1873
1874 set_free(pid_set);
1875 }
1876 }
1877
1878 if (wait_for_exit) {
1879 if (s->timeout_usec > 0)
1880 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1881 goto fail;
1882
1883 service_set_state(s, state);
1884 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1885 service_enter_stop_post(s, true);
1886 else
1887 service_enter_dead(s, true, true);
1888
1889 return;
1890
1891 fail:
1892 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1893
1894 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1895 service_enter_stop_post(s, false);
1896 else
1897 service_enter_dead(s, false, true);
1898
1899 if (pid_set)
1900 set_free(pid_set);
1901 }
1902
1903 static void service_enter_stop(Service *s, bool success) {
1904 int r;
1905
1906 assert(s);
1907
1908 if (!success)
1909 s->failure = true;
1910
1911 service_unwatch_control_pid(s);
1912
1913 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1914 s->control_command_id = SERVICE_EXEC_STOP;
1915
1916 if ((r = service_spawn(s,
1917 s->control_command,
1918 true,
1919 false,
1920 !s->permissions_start_only,
1921 !s->root_directory_start_only,
1922 false,
1923 false,
1924 &s->control_pid)) < 0)
1925 goto fail;
1926
1927 service_set_state(s, SERVICE_STOP);
1928 } else
1929 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1930
1931 return;
1932
1933 fail:
1934 log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1935 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1936 }
1937
1938 static void service_enter_running(Service *s, bool success) {
1939 int main_pid_ok, cgroup_ok;
1940 assert(s);
1941
1942 if (!success)
1943 s->failure = true;
1944
1945 main_pid_ok = main_pid_good(s);
1946 cgroup_ok = cgroup_good(s);
1947
1948 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1949 (s->bus_name_good || s->type != SERVICE_DBUS))
1950 service_set_state(s, SERVICE_RUNNING);
1951 else if (s->remain_after_exit)
1952 service_set_state(s, SERVICE_EXITED);
1953 else
1954 service_enter_stop(s, true);
1955 }
1956
1957 static void service_enter_start_post(Service *s) {
1958 int r;
1959 assert(s);
1960
1961 service_unwatch_control_pid(s);
1962
1963 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1964 s->control_command_id = SERVICE_EXEC_START_POST;
1965
1966 if ((r = service_spawn(s,
1967 s->control_command,
1968 true,
1969 false,
1970 !s->permissions_start_only,
1971 !s->root_directory_start_only,
1972 false,
1973 false,
1974 &s->control_pid)) < 0)
1975 goto fail;
1976
1977 service_set_state(s, SERVICE_START_POST);
1978 } else
1979 service_enter_running(s, true);
1980
1981 return;
1982
1983 fail:
1984 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1985 service_enter_stop(s, false);
1986 }
1987
1988 static void service_enter_start(Service *s) {
1989 pid_t pid;
1990 int r;
1991 ExecCommand *c;
1992
1993 assert(s);
1994
1995 assert(s->exec_command[SERVICE_EXEC_START]);
1996 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1997
1998 if (s->type == SERVICE_FORKING)
1999 service_unwatch_control_pid(s);
2000 else
2001 service_unwatch_main_pid(s);
2002
2003 if (s->type == SERVICE_FORKING) {
2004 s->control_command_id = SERVICE_EXEC_START;
2005 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2006
2007 s->main_command = NULL;
2008 } else {
2009 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2010 s->control_command = NULL;
2011
2012 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2013 }
2014
2015 if ((r = service_spawn(s,
2016 c,
2017 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2018 true,
2019 true,
2020 true,
2021 true,
2022 s->notify_access != NOTIFY_NONE,
2023 &pid)) < 0)
2024 goto fail;
2025
2026 if (s->type == SERVICE_SIMPLE) {
2027 /* For simple services we immediately start
2028 * the START_POST binaries. */
2029
2030 service_set_main_pid(s, pid);
2031 service_enter_start_post(s);
2032
2033 } else if (s->type == SERVICE_FORKING) {
2034
2035 /* For forking services we wait until the start
2036 * process exited. */
2037
2038 s->control_pid = pid;
2039 service_set_state(s, SERVICE_START);
2040
2041 } else if (s->type == SERVICE_ONESHOT ||
2042 s->type == SERVICE_DBUS ||
2043 s->type == SERVICE_NOTIFY) {
2044
2045 /* For oneshot services we wait until the start
2046 * process exited, too, but it is our main process. */
2047
2048 /* For D-Bus services we know the main pid right away,
2049 * but wait for the bus name to appear on the
2050 * bus. Notify services are similar. */
2051
2052 service_set_main_pid(s, pid);
2053 service_set_state(s, SERVICE_START);
2054 } else
2055 assert_not_reached("Unknown service type");
2056
2057 return;
2058
2059 fail:
2060 log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2061 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2062 }
2063
2064 static void service_enter_start_pre(Service *s) {
2065 int r;
2066
2067 assert(s);
2068
2069 service_unwatch_control_pid(s);
2070
2071 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2072 s->control_command_id = SERVICE_EXEC_START_PRE;
2073
2074 if ((r = service_spawn(s,
2075 s->control_command,
2076 true,
2077 false,
2078 !s->permissions_start_only,
2079 !s->root_directory_start_only,
2080 true,
2081 false,
2082 &s->control_pid)) < 0)
2083 goto fail;
2084
2085 service_set_state(s, SERVICE_START_PRE);
2086 } else
2087 service_enter_start(s);
2088
2089 return;
2090
2091 fail:
2092 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2093 service_enter_dead(s, false, true);
2094 }
2095
2096 static void service_enter_restart(Service *s) {
2097 int r;
2098 DBusError error;
2099
2100 assert(s);
2101 dbus_error_init(&error);
2102
2103 if (s->meta.job) {
2104 log_info("Job pending for unit, delaying automatic restart.");
2105
2106 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2107 goto fail;
2108 }
2109
2110 service_enter_dead(s, true, false);
2111
2112 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2113 goto fail;
2114
2115 log_debug("%s scheduled restart job.", s->meta.id);
2116 return;
2117
2118 fail:
2119 log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2120 service_enter_dead(s, false, false);
2121
2122 dbus_error_free(&error);
2123 }
2124
2125 static void service_enter_reload(Service *s) {
2126 int r;
2127
2128 assert(s);
2129
2130 service_unwatch_control_pid(s);
2131
2132 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2133 s->control_command_id = SERVICE_EXEC_RELOAD;
2134
2135 if ((r = service_spawn(s,
2136 s->control_command,
2137 true,
2138 false,
2139 !s->permissions_start_only,
2140 !s->root_directory_start_only,
2141 false,
2142 false,
2143 &s->control_pid)) < 0)
2144 goto fail;
2145
2146 service_set_state(s, SERVICE_RELOAD);
2147 } else
2148 service_enter_running(s, true);
2149
2150 return;
2151
2152 fail:
2153 log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2154 s->reload_failure = true;
2155 service_enter_running(s, true);
2156 }
2157
2158 static void service_run_next_control(Service *s, bool success) {
2159 int r;
2160
2161 assert(s);
2162 assert(s->control_command);
2163 assert(s->control_command->command_next);
2164
2165 if (!success)
2166 s->failure = true;
2167
2168 assert(s->control_command_id != SERVICE_EXEC_START);
2169
2170 s->control_command = s->control_command->command_next;
2171 service_unwatch_control_pid(s);
2172
2173 if ((r = service_spawn(s,
2174 s->control_command,
2175 true,
2176 false,
2177 !s->permissions_start_only,
2178 !s->root_directory_start_only,
2179 s->control_command_id == SERVICE_EXEC_START_PRE ||
2180 s->control_command_id == SERVICE_EXEC_STOP_POST,
2181 false,
2182 &s->control_pid)) < 0)
2183 goto fail;
2184
2185 return;
2186
2187 fail:
2188 log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2189
2190 if (s->state == SERVICE_START_PRE)
2191 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2192 else if (s->state == SERVICE_STOP)
2193 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2194 else if (s->state == SERVICE_STOP_POST)
2195 service_enter_dead(s, false, true);
2196 else if (s->state == SERVICE_RELOAD) {
2197 s->reload_failure = true;
2198 service_enter_running(s, true);
2199 } else
2200 service_enter_stop(s, false);
2201 }
2202
2203 static void service_run_next_main(Service *s, bool success) {
2204 pid_t pid;
2205 int r;
2206
2207 assert(s);
2208 assert(s->main_command);
2209 assert(s->main_command->command_next);
2210 assert(s->type == SERVICE_ONESHOT);
2211
2212 if (!success)
2213 s->failure = true;
2214
2215 s->main_command = s->main_command->command_next;
2216 service_unwatch_main_pid(s);
2217
2218 if ((r = service_spawn(s,
2219 s->main_command,
2220 false,
2221 true,
2222 true,
2223 true,
2224 true,
2225 s->notify_access != NOTIFY_NONE,
2226 &pid)) < 0)
2227 goto fail;
2228
2229 service_set_main_pid(s, pid);
2230
2231 return;
2232
2233 fail:
2234 log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2235 service_enter_stop(s, false);
2236 }
2237
2238 static int service_start(Unit *u) {
2239 Service *s = SERVICE(u);
2240
2241 assert(s);
2242
2243 /* We cannot fulfill this request right now, try again later
2244 * please! */
2245 if (s->state == SERVICE_STOP ||
2246 s->state == SERVICE_STOP_SIGTERM ||
2247 s->state == SERVICE_STOP_SIGKILL ||
2248 s->state == SERVICE_STOP_POST ||
2249 s->state == SERVICE_FINAL_SIGTERM ||
2250 s->state == SERVICE_FINAL_SIGKILL)
2251 return -EAGAIN;
2252
2253 /* Already on it! */
2254 if (s->state == SERVICE_START_PRE ||
2255 s->state == SERVICE_START ||
2256 s->state == SERVICE_START_POST)
2257 return 0;
2258
2259 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2260
2261 /* Make sure we don't enter a busy loop of some kind. */
2262 if (!ratelimit_test(&s->ratelimit)) {
2263 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2264 return -ECANCELED;
2265 }
2266
2267 s->failure = false;
2268 s->main_pid_known = false;
2269 s->forbid_restart = false;
2270
2271 service_enter_start_pre(s);
2272 return 0;
2273 }
2274
2275 static int service_stop(Unit *u) {
2276 Service *s = SERVICE(u);
2277
2278 assert(s);
2279
2280 /* This is a user request, so don't do restarts on this
2281 * shutdown. */
2282 s->forbid_restart = true;
2283
2284 /* Already on it */
2285 if (s->state == SERVICE_STOP ||
2286 s->state == SERVICE_STOP_SIGTERM ||
2287 s->state == SERVICE_STOP_SIGKILL ||
2288 s->state == SERVICE_STOP_POST ||
2289 s->state == SERVICE_FINAL_SIGTERM ||
2290 s->state == SERVICE_FINAL_SIGKILL)
2291 return 0;
2292
2293 /* Don't allow a restart */
2294 if (s->state == SERVICE_AUTO_RESTART) {
2295 service_set_state(s, SERVICE_DEAD);
2296 return 0;
2297 }
2298
2299 /* If there's already something running we go directly into
2300 * kill mode. */
2301 if (s->state == SERVICE_START_PRE ||
2302 s->state == SERVICE_START ||
2303 s->state == SERVICE_START_POST ||
2304 s->state == SERVICE_RELOAD) {
2305 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2306 return 0;
2307 }
2308
2309 assert(s->state == SERVICE_RUNNING ||
2310 s->state == SERVICE_EXITED);
2311
2312 service_enter_stop(s, true);
2313 return 0;
2314 }
2315
2316 static int service_reload(Unit *u) {
2317 Service *s = SERVICE(u);
2318
2319 assert(s);
2320
2321 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2322
2323 service_enter_reload(s);
2324 return 0;
2325 }
2326
2327 static bool service_can_reload(Unit *u) {
2328 Service *s = SERVICE(u);
2329
2330 assert(s);
2331
2332 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2333 }
2334
2335 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2336 Service *s = SERVICE(u);
2337
2338 assert(u);
2339 assert(f);
2340 assert(fds);
2341
2342 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2343 unit_serialize_item(u, f, "failure", yes_no(s->failure));
2344
2345 if (s->control_pid > 0)
2346 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2347
2348 if (s->main_pid_known && s->main_pid > 0)
2349 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2350
2351 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2352
2353 if (s->status_text)
2354 unit_serialize_item(u, f, "status-text", s->status_text);
2355
2356 /* There's a minor uncleanliness here: if there are multiple
2357 * commands attached here, we will start from the first one
2358 * again */
2359 if (s->control_command_id >= 0)
2360 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2361
2362 if (s->socket_fd >= 0) {
2363 int copy;
2364
2365 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2366 return copy;
2367
2368 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2369 }
2370
2371 if (s->main_exec_status.pid > 0) {
2372 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2373 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2374 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2375
2376 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2377 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2378 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2379 }
2380 }
2381
2382 return 0;
2383 }
2384
2385 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2386 Service *s = SERVICE(u);
2387
2388 assert(u);
2389 assert(key);
2390 assert(value);
2391 assert(fds);
2392
2393 if (streq(key, "state")) {
2394 ServiceState state;
2395
2396 if ((state = service_state_from_string(value)) < 0)
2397 log_debug("Failed to parse state value %s", value);
2398 else
2399 s->deserialized_state = state;
2400 } else if (streq(key, "failure")) {
2401 int b;
2402
2403 if ((b = parse_boolean(value)) < 0)
2404 log_debug("Failed to parse failure value %s", value);
2405 else
2406 s->failure = b || s->failure;
2407 } else if (streq(key, "control-pid")) {
2408 pid_t pid;
2409
2410 if (parse_pid(value, &pid) < 0)
2411 log_debug("Failed to parse control-pid value %s", value);
2412 else
2413 s->control_pid = pid;
2414 } else if (streq(key, "main-pid")) {
2415 pid_t pid;
2416
2417 if (parse_pid(value, &pid) < 0)
2418 log_debug("Failed to parse main-pid value %s", value);
2419 else
2420 service_set_main_pid(s, (pid_t) pid);
2421 } else if (streq(key, "main-pid-known")) {
2422 int b;
2423
2424 if ((b = parse_boolean(value)) < 0)
2425 log_debug("Failed to parse main-pid-known value %s", value);
2426 else
2427 s->main_pid_known = b;
2428 } else if (streq(key, "status-text")) {
2429 char *t;
2430
2431 if ((t = strdup(value))) {
2432 free(s->status_text);
2433 s->status_text = t;
2434 }
2435
2436 } else if (streq(key, "control-command")) {
2437 ServiceExecCommand id;
2438
2439 if ((id = service_exec_command_from_string(value)) < 0)
2440 log_debug("Failed to parse exec-command value %s", value);
2441 else {
2442 s->control_command_id = id;
2443 s->control_command = s->exec_command[id];
2444 }
2445 } else if (streq(key, "socket-fd")) {
2446 int fd;
2447
2448 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2449 log_debug("Failed to parse socket-fd value %s", value);
2450 else {
2451
2452 if (s->socket_fd >= 0)
2453 close_nointr_nofail(s->socket_fd);
2454 s->socket_fd = fdset_remove(fds, fd);
2455 }
2456 } else if (streq(key, "main-exec-status-pid")) {
2457 pid_t pid;
2458
2459 if (parse_pid(value, &pid) < 0)
2460 log_debug("Failed to parse main-exec-status-pid value %s", value);
2461 else
2462 s->main_exec_status.pid = pid;
2463 } else if (streq(key, "main-exec-status-code")) {
2464 int i;
2465
2466 if (safe_atoi(value, &i) < 0)
2467 log_debug("Failed to parse main-exec-status-code value %s", value);
2468 else
2469 s->main_exec_status.code = i;
2470 } else if (streq(key, "main-exec-status-status")) {
2471 int i;
2472
2473 if (safe_atoi(value, &i) < 0)
2474 log_debug("Failed to parse main-exec-status-status value %s", value);
2475 else
2476 s->main_exec_status.status = i;
2477 } else if (streq(key, "main-exec-status-start"))
2478 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2479 else if (streq(key, "main-exec-status-exit"))
2480 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2481 else
2482 log_debug("Unknown serialization key '%s'", key);
2483
2484 return 0;
2485 }
2486
2487 static UnitActiveState service_active_state(Unit *u) {
2488 assert(u);
2489
2490 return state_translation_table[SERVICE(u)->state];
2491 }
2492
2493 static const char *service_sub_state_to_string(Unit *u) {
2494 assert(u);
2495
2496 return service_state_to_string(SERVICE(u)->state);
2497 }
2498
2499 static bool service_check_gc(Unit *u) {
2500 Service *s = SERVICE(u);
2501
2502 assert(s);
2503
2504 /* Never clean up services that still have a process around,
2505 * even if the service is formally dead. */
2506 if (cgroup_good(s) > 0 ||
2507 main_pid_good(s) > 0 ||
2508 control_pid_good(s) > 0)
2509 return true;
2510
2511 #ifdef HAVE_SYSV_COMPAT
2512 if (s->sysv_path)
2513 return true;
2514 #endif
2515
2516 return false;
2517 }
2518
2519 static bool service_check_snapshot(Unit *u) {
2520 Service *s = SERVICE(u);
2521
2522 assert(s);
2523
2524 return !s->got_socket_fd;
2525 }
2526
2527 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2528 Service *s = SERVICE(u);
2529 bool success;
2530
2531 assert(s);
2532 assert(pid >= 0);
2533
2534 if (!s->meta.fragment_path)
2535 success = is_clean_exit_lsb(code, status);
2536 else
2537 success = is_clean_exit(code, status);
2538
2539 if (s->main_pid == pid) {
2540
2541 s->main_pid = 0;
2542 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2543
2544 /* If this is not a forking service than the main
2545 * process got started and hence we copy the exit
2546 * status so that it is recorded both as main and as
2547 * control process exit status */
2548 if (s->main_command) {
2549 s->main_command->exec_status = s->main_exec_status;
2550
2551 if (s->main_command->ignore)
2552 success = true;
2553 }
2554
2555 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2556 "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2557 s->failure = s->failure || !success;
2558
2559 if (s->main_command &&
2560 s->main_command->command_next &&
2561 success) {
2562
2563 /* There is another command to *
2564 * execute, so let's do that. */
2565
2566 log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2567 service_run_next_main(s, success);
2568
2569 } else {
2570
2571 /* The service exited, so the service is officially
2572 * gone. */
2573 s->main_command = NULL;
2574
2575 switch (s->state) {
2576
2577 case SERVICE_START_POST:
2578 case SERVICE_RELOAD:
2579 case SERVICE_STOP:
2580 /* Need to wait until the operation is
2581 * done */
2582 break;
2583
2584 case SERVICE_START:
2585 if (s->type == SERVICE_ONESHOT) {
2586 /* This was our main goal, so let's go on */
2587 if (success)
2588 service_enter_start_post(s);
2589 else
2590 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2591 break;
2592 } else {
2593 assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2594
2595 /* Fall through */
2596 }
2597
2598 case SERVICE_RUNNING:
2599 service_enter_running(s, success);
2600 break;
2601
2602 case SERVICE_STOP_SIGTERM:
2603 case SERVICE_STOP_SIGKILL:
2604
2605 if (!control_pid_good(s))
2606 service_enter_stop_post(s, success);
2607
2608 /* If there is still a control process, wait for that first */
2609 break;
2610
2611 default:
2612 assert_not_reached("Uh, main process died at wrong time.");
2613 }
2614 }
2615
2616 } else if (s->control_pid == pid) {
2617
2618 s->control_pid = 0;
2619
2620 if (s->control_command) {
2621 exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2622
2623 if (s->control_command->ignore)
2624 success = true;
2625 }
2626
2627 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2628 "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2629 s->failure = s->failure || !success;
2630
2631 if (s->control_command &&
2632 s->control_command->command_next &&
2633 success) {
2634
2635 /* There is another command to *
2636 * execute, so let's do that. */
2637
2638 log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2639 service_run_next_control(s, success);
2640
2641 } else {
2642 /* No further commands for this step, so let's
2643 * figure out what to do next */
2644
2645 s->control_command = NULL;
2646 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2647
2648 log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2649
2650 switch (s->state) {
2651
2652 case SERVICE_START_PRE:
2653 if (success)
2654 service_enter_start(s);
2655 else
2656 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2657 break;
2658
2659 case SERVICE_START:
2660 assert(s->type == SERVICE_FORKING);
2661
2662 /* Let's try to load the pid
2663 * file here if we can. We
2664 * ignore the return value,
2665 * since the PID file might
2666 * actually be created by a
2667 * START_POST script */
2668
2669 if (success) {
2670 service_load_pid_file(s);
2671 service_search_main_pid(s);
2672
2673 service_enter_start_post(s);
2674 } else
2675 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2676
2677 break;
2678
2679 case SERVICE_START_POST:
2680 if (success && s->pid_file && !s->main_pid_known) {
2681 int r;
2682
2683 /* Hmm, let's see if we can
2684 * load the pid now after the
2685 * start-post scripts got
2686 * executed. */
2687
2688 if ((r = service_load_pid_file(s)) < 0)
2689 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2690 }
2691
2692 s->reload_failure = !success;
2693 service_enter_running(s, true);
2694 break;
2695
2696 case SERVICE_RELOAD:
2697 if (success) {
2698 service_load_pid_file(s);
2699 service_search_main_pid(s);
2700 }
2701
2702 s->reload_failure = !success;
2703 service_enter_running(s, true);
2704 break;
2705
2706 case SERVICE_STOP:
2707 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2708 break;
2709
2710 case SERVICE_STOP_SIGTERM:
2711 case SERVICE_STOP_SIGKILL:
2712 if (main_pid_good(s) <= 0)
2713 service_enter_stop_post(s, success);
2714
2715 /* If there is still a service
2716 * process around, wait until
2717 * that one quit, too */
2718 break;
2719
2720 case SERVICE_STOP_POST:
2721 case SERVICE_FINAL_SIGTERM:
2722 case SERVICE_FINAL_SIGKILL:
2723 service_enter_dead(s, success, true);
2724 break;
2725
2726 default:
2727 assert_not_reached("Uh, control process died at wrong time.");
2728 }
2729 }
2730 }
2731
2732 /* Notify clients about changed exit status */
2733 unit_add_to_dbus_queue(u);
2734 }
2735
2736 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2737 Service *s = SERVICE(u);
2738
2739 assert(s);
2740 assert(elapsed == 1);
2741
2742 assert(w == &s->timer_watch);
2743
2744 switch (s->state) {
2745
2746 case SERVICE_START_PRE:
2747 case SERVICE_START:
2748 log_warning("%s operation timed out. Terminating.", u->meta.id);
2749 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2750 break;
2751
2752 case SERVICE_START_POST:
2753 log_warning("%s operation timed out. Stopping.", u->meta.id);
2754 service_enter_stop(s, false);
2755 break;
2756
2757 case SERVICE_RELOAD:
2758 log_warning("%s operation timed out. Stopping.", u->meta.id);
2759 s->reload_failure = true;
2760 service_enter_running(s, true);
2761 break;
2762
2763 case SERVICE_STOP:
2764 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2765 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2766 break;
2767
2768 case SERVICE_STOP_SIGTERM:
2769 if (s->exec_context.send_sigkill) {
2770 log_warning("%s stopping timed out. Killing.", u->meta.id);
2771 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2772 } else {
2773 log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2774 service_enter_stop_post(s, false);
2775 }
2776
2777 break;
2778
2779 case SERVICE_STOP_SIGKILL:
2780 /* Uh, wie sent a SIGKILL and it is still not gone?
2781 * Must be something we cannot kill, so let's just be
2782 * weirded out and continue */
2783
2784 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2785 service_enter_stop_post(s, false);
2786 break;
2787
2788 case SERVICE_STOP_POST:
2789 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2790 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2791 break;
2792
2793 case SERVICE_FINAL_SIGTERM:
2794 if (s->exec_context.send_sigkill) {
2795 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2796 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2797 } else {
2798 log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2799 service_enter_dead(s, false, true);
2800 }
2801
2802 break;
2803
2804 case SERVICE_FINAL_SIGKILL:
2805 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2806 service_enter_dead(s, false, true);
2807 break;
2808
2809 case SERVICE_AUTO_RESTART:
2810 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2811 service_enter_restart(s);
2812 break;
2813
2814 default:
2815 assert_not_reached("Timeout at wrong time.");
2816 }
2817 }
2818
2819 static void service_cgroup_notify_event(Unit *u) {
2820 Service *s = SERVICE(u);
2821
2822 assert(u);
2823
2824 log_debug("%s: cgroup is empty", u->meta.id);
2825
2826 switch (s->state) {
2827
2828 /* Waiting for SIGCHLD is usually more interesting,
2829 * because it includes return codes/signals. Which is
2830 * why we ignore the cgroup events for most cases,
2831 * except when we don't know pid which to expect the
2832 * SIGCHLD for. */
2833
2834 case SERVICE_RUNNING:
2835 service_enter_running(s, true);
2836 break;
2837
2838 case SERVICE_STOP_SIGTERM:
2839 case SERVICE_STOP_SIGKILL:
2840 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2841 service_enter_stop_post(s, true);
2842
2843 break;
2844
2845 case SERVICE_FINAL_SIGTERM:
2846 case SERVICE_FINAL_SIGKILL:
2847 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2848 service_enter_dead(s, true, true);
2849
2850 break;
2851
2852 default:
2853 ;
2854 }
2855 }
2856
2857 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2858 Service *s = SERVICE(u);
2859 const char *e;
2860
2861 assert(u);
2862
2863 if (s->notify_access == NOTIFY_NONE) {
2864 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2865 u->meta.id, (unsigned long) pid);
2866 return;
2867 }
2868
2869 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2870 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2871 u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2872 return;
2873 }
2874
2875 log_debug("%s: Got message", u->meta.id);
2876
2877 /* Interpret MAINPID= */
2878 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2879 (s->state == SERVICE_START ||
2880 s->state == SERVICE_START_POST ||
2881 s->state == SERVICE_RUNNING ||
2882 s->state == SERVICE_RELOAD)) {
2883
2884 if (parse_pid(e + 8, &pid) < 0)
2885 log_warning("Failed to parse notification message %s", e);
2886 else {
2887 log_debug("%s: got %s", u->meta.id, e);
2888 service_set_main_pid(s, pid);
2889 }
2890 }
2891
2892 /* Interpret READY= */
2893 if (s->type == SERVICE_NOTIFY &&
2894 s->state == SERVICE_START &&
2895 strv_find(tags, "READY=1")) {
2896 log_debug("%s: got READY=1", u->meta.id);
2897
2898 service_enter_start_post(s);
2899 }
2900
2901 /* Interpret STATUS= */
2902 if ((e = strv_find_prefix(tags, "STATUS="))) {
2903 char *t;
2904
2905 if (e[7]) {
2906 if (!(t = strdup(e+7))) {
2907 log_error("Failed to allocate string.");
2908 return;
2909 }
2910
2911 log_debug("%s: got %s", u->meta.id, e);
2912
2913 free(s->status_text);
2914 s->status_text = t;
2915 } else {
2916 free(s->status_text);
2917 s->status_text = NULL;
2918 }
2919
2920 }
2921
2922 /* Notify clients about changed status or main pid */
2923 unit_add_to_dbus_queue(u);
2924 }
2925
2926 #ifdef HAVE_SYSV_COMPAT
2927 static int service_enumerate(Manager *m) {
2928 char **p;
2929 unsigned i;
2930 DIR *d = NULL;
2931 char *path = NULL, *fpath = NULL, *name = NULL;
2932 Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2933 Unit *service;
2934 Iterator j;
2935 int r;
2936
2937 assert(m);
2938
2939 zero(runlevel_services);
2940
2941 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2942 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2943 struct dirent *de;
2944
2945 free(path);
2946 path = NULL;
2947 if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2948 r = -ENOMEM;
2949 goto finish;
2950 }
2951
2952 if (d)
2953 closedir(d);
2954
2955 if (!(d = opendir(path))) {
2956 if (errno != ENOENT)
2957 log_warning("opendir() failed on %s: %s", path, strerror(errno));
2958
2959 continue;
2960 }
2961
2962 while ((de = readdir(d))) {
2963 int a, b;
2964
2965 if (ignore_file(de->d_name))
2966 continue;
2967
2968 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2969 continue;
2970
2971 if (strlen(de->d_name) < 4)
2972 continue;
2973
2974 a = undecchar(de->d_name[1]);
2975 b = undecchar(de->d_name[2]);
2976
2977 if (a < 0 || b < 0)
2978 continue;
2979
2980 free(fpath);
2981 fpath = NULL;
2982 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2983 r = -ENOMEM;
2984 goto finish;
2985 }
2986
2987 if (access(fpath, X_OK) < 0) {
2988
2989 if (errno != ENOENT)
2990 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2991
2992 continue;
2993 }
2994
2995 free(name);
2996 if (!(name = sysv_translate_name(de->d_name + 3))) {
2997 r = -ENOMEM;
2998 goto finish;
2999 }
3000
3001 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
3002 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3003 continue;
3004 }
3005
3006 if (de->d_name[0] == 'S') {
3007
3008 if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
3009 SERVICE(service)->sysv_start_priority =
3010 MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
3011
3012 SERVICE(service)->sysv_enabled = true;
3013 }
3014
3015 if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3016 goto finish;
3017
3018 if ((r = set_put(runlevel_services[i], service)) < 0)
3019 goto finish;
3020
3021 } else if (de->d_name[0] == 'K' &&
3022 (rcnd_table[i].type == RUNLEVEL_DOWN ||
3023 rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3024
3025 if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3026 goto finish;
3027
3028 if ((r = set_put(shutdown_services, service)) < 0)
3029 goto finish;
3030 }
3031 }
3032 }
3033
3034 /* Now we loaded all stubs and are aware of the lowest
3035 start-up priority for all services, not let's actually load
3036 the services, this will also tell us which services are
3037 actually native now */
3038 manager_dispatch_load_queue(m);
3039
3040 /* If this is a native service, rely on native ways to pull in
3041 * a service, don't pull it in via sysv rcN.d links. */
3042 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3043 SET_FOREACH(service, runlevel_services[i], j) {
3044 service = unit_follow_merge(service);
3045
3046 if (service->meta.fragment_path)
3047 continue;
3048
3049 if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3050 goto finish;
3051 }
3052
3053 /* We honour K links only for halt/reboot. For the normal
3054 * runlevels we assume the stop jobs will be implicitly added
3055 * by the core logic. Also, we don't really distuingish here
3056 * between the runlevels 0 and 6 and just add them to the
3057 * special shutdown target. On SUSE the boot.d/ runlevel is
3058 * also used for shutdown, so we add links for that too to the
3059 * shutdown target.*/
3060 SET_FOREACH(service, shutdown_services, j) {
3061 service = unit_follow_merge(service);
3062
3063 if (service->meta.fragment_path)
3064 continue;
3065
3066 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3067 goto finish;
3068 }
3069
3070 r = 0;
3071
3072 finish:
3073 free(path);
3074 free(fpath);
3075 free(name);
3076
3077 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3078 set_free(runlevel_services[i]);
3079 set_free(shutdown_services);
3080
3081 if (d)
3082 closedir(d);
3083
3084 return r;
3085 }
3086 #endif
3087
3088 static void service_bus_name_owner_change(
3089 Unit *u,
3090 const char *name,
3091 const char *old_owner,
3092 const char *new_owner) {
3093
3094 Service *s = SERVICE(u);
3095
3096 assert(s);
3097 assert(name);
3098
3099 assert(streq(s->bus_name, name));
3100 assert(old_owner || new_owner);
3101
3102 if (old_owner && new_owner)
3103 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3104 else if (old_owner)
3105 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3106 else
3107 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3108
3109 s->bus_name_good = !!new_owner;
3110
3111 if (s->type == SERVICE_DBUS) {
3112
3113 /* service_enter_running() will figure out what to
3114 * do */
3115 if (s->state == SERVICE_RUNNING)
3116 service_enter_running(s, true);
3117 else if (s->state == SERVICE_START && new_owner)
3118 service_enter_start_post(s);
3119
3120 } else if (new_owner &&
3121 s->main_pid <= 0 &&
3122 (s->state == SERVICE_START ||
3123 s->state == SERVICE_START_POST ||
3124 s->state == SERVICE_RUNNING ||
3125 s->state == SERVICE_RELOAD)) {
3126
3127 /* Try to acquire PID from bus service */
3128 log_debug("Trying to acquire PID from D-Bus name...");
3129
3130 bus_query_pid(u->meta.manager, name);
3131 }
3132 }
3133
3134 static void service_bus_query_pid_done(
3135 Unit *u,
3136 const char *name,
3137 pid_t pid) {
3138
3139 Service *s = SERVICE(u);
3140
3141 assert(s);
3142 assert(name);
3143
3144 log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3145
3146 if (s->main_pid <= 0 &&
3147 (s->state == SERVICE_START ||
3148 s->state == SERVICE_START_POST ||
3149 s->state == SERVICE_RUNNING ||
3150 s->state == SERVICE_RELOAD))
3151 service_set_main_pid(s, pid);
3152 }
3153
3154 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3155 assert(s);
3156 assert(fd >= 0);
3157
3158 /* This is called by the socket code when instantiating a new
3159 * service for a stream socket and the socket needs to be
3160 * configured. */
3161
3162 if (s->meta.load_state != UNIT_LOADED)
3163 return -EINVAL;
3164
3165 if (s->socket_fd >= 0)
3166 return -EBUSY;
3167
3168 if (s->state != SERVICE_DEAD)
3169 return -EAGAIN;
3170
3171 s->socket_fd = fd;
3172 s->got_socket_fd = true;
3173 s->accept_socket = sock;
3174
3175 return 0;
3176 }
3177
3178 static void service_reset_failed(Unit *u) {
3179 Service *s = SERVICE(u);
3180
3181 assert(s);
3182
3183 if (s->state == SERVICE_FAILED)
3184 service_set_state(s, SERVICE_DEAD);
3185
3186 s->failure = false;
3187 }
3188
3189 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3190 Service *s = SERVICE(u);
3191 int r = 0;
3192 Set *pid_set = NULL;
3193
3194 assert(s);
3195
3196 if (s->main_pid <= 0 && who == KILL_MAIN) {
3197 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3198 return -EINVAL;
3199 }
3200
3201 if (s->control_pid <= 0 && who == KILL_CONTROL) {
3202 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3203 return -ENOENT;
3204 }
3205
3206 if (s->control_pid > 0)
3207 if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0)
3208 r = -errno;
3209
3210 if (s->main_pid > 0)
3211 if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0)
3212 r = -errno;
3213
3214 if (mode == KILL_CONTROL_GROUP) {
3215 int q;
3216
3217 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3218 return -ENOMEM;
3219
3220 /* Exclude the control/main pid from being killed via the cgroup */
3221 if (s->control_pid > 0)
3222 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3223 r = q;
3224 goto finish;
3225 }
3226
3227 if (s->main_pid > 0)
3228 if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3229 r = q;
3230 goto finish;
3231 }
3232
3233 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, pid_set)) < 0)
3234 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3235 r = q;
3236 }
3237
3238 finish:
3239 if (pid_set)
3240 set_free(pid_set);
3241
3242 return r;
3243 }
3244
3245 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3246 [SERVICE_DEAD] = "dead",
3247 [SERVICE_START_PRE] = "start-pre",
3248 [SERVICE_START] = "start",
3249 [SERVICE_START_POST] = "start-post",
3250 [SERVICE_RUNNING] = "running",
3251 [SERVICE_EXITED] = "exited",
3252 [SERVICE_RELOAD] = "reload",
3253 [SERVICE_STOP] = "stop",
3254 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3255 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3256 [SERVICE_STOP_POST] = "stop-post",
3257 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3258 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3259 [SERVICE_FAILED] = "failed",
3260 [SERVICE_AUTO_RESTART] = "auto-restart",
3261 };
3262
3263 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3264
3265 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3266 [SERVICE_RESTART_NO] = "no",
3267 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3268 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3269 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3270 [SERVICE_RESTART_ALWAYS] = "always"
3271 };
3272
3273 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3274
3275 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3276 [SERVICE_SIMPLE] = "simple",
3277 [SERVICE_FORKING] = "forking",
3278 [SERVICE_ONESHOT] = "oneshot",
3279 [SERVICE_DBUS] = "dbus",
3280 [SERVICE_NOTIFY] = "notify"
3281 };
3282
3283 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3284
3285 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3286 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3287 [SERVICE_EXEC_START] = "ExecStart",
3288 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3289 [SERVICE_EXEC_RELOAD] = "ExecReload",
3290 [SERVICE_EXEC_STOP] = "ExecStop",
3291 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3292 };
3293
3294 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3295
3296 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3297 [NOTIFY_NONE] = "none",
3298 [NOTIFY_MAIN] = "main",
3299 [NOTIFY_ALL] = "all"
3300 };
3301
3302 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3303
3304 const UnitVTable service_vtable = {
3305 .suffix = ".service",
3306 .show_status = true,
3307
3308 .init = service_init,
3309 .done = service_done,
3310 .load = service_load,
3311
3312 .coldplug = service_coldplug,
3313
3314 .dump = service_dump,
3315
3316 .start = service_start,
3317 .stop = service_stop,
3318 .reload = service_reload,
3319
3320 .can_reload = service_can_reload,
3321
3322 .kill = service_kill,
3323
3324 .serialize = service_serialize,
3325 .deserialize_item = service_deserialize_item,
3326
3327 .active_state = service_active_state,
3328 .sub_state_to_string = service_sub_state_to_string,
3329
3330 .check_gc = service_check_gc,
3331 .check_snapshot = service_check_snapshot,
3332
3333 .sigchld_event = service_sigchld_event,
3334 .timer_event = service_timer_event,
3335
3336 .reset_failed = service_reset_failed,
3337
3338 .cgroup_notify_empty = service_cgroup_notify_event,
3339 .notify_message = service_notify_message,
3340
3341 .bus_name_owner_change = service_bus_name_owner_change,
3342 .bus_query_pid_done = service_bus_query_pid_done,
3343
3344 .bus_interface = "org.freedesktop.systemd1.Service",
3345 .bus_message_handler = bus_service_message_handler,
3346 .bus_invalidating_properties = bus_service_invalidating_properties,
3347
3348 #ifdef HAVE_SYSV_COMPAT
3349 .enumerate = service_enumerate
3350 #endif
3351 };
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