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service: handle forking services that move to a new PID
[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 #include "def.h"
39 #include "util.h"
40
41 #ifdef HAVE_SYSV_COMPAT
42
43 #define DEFAULT_SYSV_TIMEOUT_USEC (5*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_ANGSTROM)
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 s->sysv_start_priority_from_rcnd = -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 s->main_pid = pid;
164 s->main_pid_known = true;
165
166 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
167 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
168 s->meta.id, (unsigned long) pid);
169
170 s->main_pid_alien = true;
171 } else
172 s->main_pid_alien = false;
173
174 exec_status_start(&s->main_exec_status, pid);
175
176 return 0;
177 }
178
179 static void service_close_socket_fd(Service *s) {
180 assert(s);
181
182 if (s->socket_fd < 0)
183 return;
184
185 close_nointr_nofail(s->socket_fd);
186 s->socket_fd = -1;
187 }
188
189 static void service_connection_unref(Service *s) {
190 assert(s);
191
192 if (!s->accept_socket)
193 return;
194
195 socket_connection_unref(s->accept_socket);
196 s->accept_socket = NULL;
197 }
198
199 static void service_done(Unit *u) {
200 Service *s = SERVICE(u);
201
202 assert(s);
203
204 free(s->pid_file);
205 s->pid_file = NULL;
206
207 #ifdef HAVE_SYSV_COMPAT
208 free(s->sysv_path);
209 s->sysv_path = NULL;
210
211 free(s->sysv_runlevels);
212 s->sysv_runlevels = NULL;
213 #endif
214
215 free(s->status_text);
216 s->status_text = NULL;
217
218 exec_context_done(&s->exec_context);
219 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
220 s->control_command = NULL;
221 s->main_command = NULL;
222
223 /* This will leak a process, but at least no memory or any of
224 * our resources */
225 service_unwatch_main_pid(s);
226 service_unwatch_control_pid(s);
227
228 if (s->bus_name) {
229 unit_unwatch_bus_name(UNIT(u), s->bus_name);
230 free(s->bus_name);
231 s->bus_name = NULL;
232 }
233
234 service_close_socket_fd(s);
235 service_connection_unref(s);
236
237 set_free(s->configured_sockets);
238
239 unit_unwatch_timer(u, &s->timer_watch);
240 }
241
242 #ifdef HAVE_SYSV_COMPAT
243 static char *sysv_translate_name(const char *name) {
244 char *r;
245
246 if (!(r = new(char, strlen(name) + sizeof(".service"))))
247 return NULL;
248
249 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
250 if (endswith(name, ".sh"))
251 /* Drop Debian-style .sh suffix */
252 strcpy(stpcpy(r, name) - 3, ".service");
253 #endif
254 #ifdef TARGET_SUSE
255 if (startswith(name, "boot."))
256 /* Drop SuSE-style boot. prefix */
257 strcpy(stpcpy(r, name + 5), ".service");
258 #endif
259 #ifdef TARGET_FRUGALWARE
260 if (startswith(name, "rc."))
261 /* Drop Frugalware-style rc. prefix */
262 strcpy(stpcpy(r, name + 3), ".service");
263 #endif
264 else
265 /* Normal init scripts */
266 strcpy(stpcpy(r, name), ".service");
267
268 return r;
269 }
270
271 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
272
273 /* We silently ignore the $ prefix here. According to the LSB
274 * spec it simply indicates whether something is a
275 * standardized name or a distribution-specific one. Since we
276 * just follow what already exists and do not introduce new
277 * uses or names we don't care who introduced a new name. */
278
279 static const char * const table[] = {
280 /* LSB defined facilities */
281 "local_fs", SPECIAL_LOCAL_FS_TARGET,
282 #ifndef TARGET_MANDRIVA
283 /* Due to unfortunate name selection in Mandriva,
284 * $network is provided by network-up which is ordered
285 * after network which actually starts interfaces.
286 * To break the loop, just ignore it */
287 "network", SPECIAL_NETWORK_TARGET,
288 #endif
289 "named", SPECIAL_NSS_LOOKUP_TARGET,
290 "portmap", SPECIAL_RPCBIND_TARGET,
291 "remote_fs", SPECIAL_REMOTE_FS_TARGET,
292 "syslog", SPECIAL_SYSLOG_TARGET,
293 "time", SPECIAL_TIME_SYNC_TARGET,
294
295 /* common extensions */
296 "mail-transfer-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
297 "x-display-manager", SPECIAL_DISPLAY_MANAGER_SERVICE,
298 "null", NULL,
299
300 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
301 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
302 #endif
303
304 #ifdef TARGET_FEDORA
305 "MTA", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
306 "smtpdaemon", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
307 "httpd", SPECIAL_HTTP_DAEMON_TARGET,
308 #endif
309
310 #ifdef TARGET_SUSE
311 "smtp", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
312 #endif
313 };
314
315 unsigned i;
316 char *r;
317 const char *n;
318
319 assert(name);
320 assert(_r);
321
322 n = *name == '$' ? name + 1 : name;
323
324 for (i = 0; i < ELEMENTSOF(table); i += 2) {
325
326 if (!streq(table[i], n))
327 continue;
328
329 if (!table[i+1])
330 return 0;
331
332 if (!(r = strdup(table[i+1])))
333 return -ENOMEM;
334
335 goto finish;
336 }
337
338 /* If we don't know this name, fallback heuristics to figure
339 * out whether something is a target or a service alias. */
340
341 if (*name == '$') {
342 if (!unit_prefix_is_valid(n))
343 return -EINVAL;
344
345 /* Facilities starting with $ are most likely targets */
346 r = unit_name_build(n, NULL, ".target");
347 } else if (filename && streq(name, filename))
348 /* Names equaling the file name of the services are redundant */
349 return 0;
350 else
351 /* Everything else we assume to be normal service names */
352 r = sysv_translate_name(n);
353
354 if (!r)
355 return -ENOMEM;
356
357 finish:
358 *_r = r;
359
360 return 1;
361 }
362
363 static int sysv_fix_order(Service *s) {
364 Meta *other;
365 int r;
366
367 assert(s);
368
369 if (s->sysv_start_priority < 0)
370 return 0;
371
372 /* For each pair of services where at least one lacks a LSB
373 * header, we use the start priority value to order things. */
374
375 LIST_FOREACH(units_by_type, other, s->meta.manager->units_by_type[UNIT_SERVICE]) {
376 Service *t;
377 UnitDependency d;
378 bool special_s, special_t;
379
380 t = (Service*) other;
381
382 if (s == t)
383 continue;
384
385 if (t->meta.load_state != UNIT_LOADED)
386 continue;
387
388 if (t->sysv_start_priority < 0)
389 continue;
390
391 /* If both units have modern headers we don't care
392 * about the priorities */
393 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
394 (t->meta.fragment_path || t->sysv_has_lsb))
395 continue;
396
397 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
398 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
399
400 if (special_t && !special_s)
401 d = UNIT_AFTER;
402 else if (special_s && !special_t)
403 d = UNIT_BEFORE;
404 else if (t->sysv_start_priority < s->sysv_start_priority)
405 d = UNIT_AFTER;
406 else if (t->sysv_start_priority > s->sysv_start_priority)
407 d = UNIT_BEFORE;
408 else
409 continue;
410
411 /* FIXME: Maybe we should compare the name here lexicographically? */
412
413 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
414 return r;
415 }
416
417 return 0;
418 }
419
420 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
421 ExecCommand *c;
422
423 if (!(c = new0(ExecCommand, 1)))
424 return NULL;
425
426 if (!(c->path = strdup(path))) {
427 free(c);
428 return NULL;
429 }
430
431 if (!(c->argv = strv_new(path, arg1, NULL))) {
432 free(c->path);
433 free(c);
434 return NULL;
435 }
436
437 return c;
438 }
439
440 static int sysv_exec_commands(Service *s) {
441 ExecCommand *c;
442
443 assert(s);
444 assert(s->sysv_path);
445
446 if (!(c = exec_command_new(s->sysv_path, "start")))
447 return -ENOMEM;
448 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
449
450 if (!(c = exec_command_new(s->sysv_path, "stop")))
451 return -ENOMEM;
452 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
453
454 if (!(c = exec_command_new(s->sysv_path, "reload")))
455 return -ENOMEM;
456 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
457
458 return 0;
459 }
460
461 static int service_load_sysv_path(Service *s, const char *path) {
462 FILE *f;
463 Unit *u;
464 unsigned line = 0;
465 int r;
466 enum {
467 NORMAL,
468 DESCRIPTION,
469 LSB,
470 LSB_DESCRIPTION
471 } state = NORMAL;
472 char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
473 struct stat st;
474
475 assert(s);
476 assert(path);
477
478 u = UNIT(s);
479
480 if (!(f = fopen(path, "re"))) {
481 r = errno == ENOENT ? 0 : -errno;
482 goto finish;
483 }
484
485 zero(st);
486 if (fstat(fileno(f), &st) < 0) {
487 r = -errno;
488 goto finish;
489 }
490
491 free(s->sysv_path);
492 if (!(s->sysv_path = strdup(path))) {
493 r = -ENOMEM;
494 goto finish;
495 }
496
497 s->sysv_mtime = timespec_load(&st.st_mtim);
498
499 if (null_or_empty(&st)) {
500 u->meta.load_state = UNIT_MASKED;
501 r = 0;
502 goto finish;
503 }
504
505 while (!feof(f)) {
506 char l[LINE_MAX], *t;
507
508 if (!fgets(l, sizeof(l), f)) {
509 if (feof(f))
510 break;
511
512 r = -errno;
513 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
514 goto finish;
515 }
516
517 line++;
518
519 t = strstrip(l);
520 if (*t != '#')
521 continue;
522
523 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
524 state = LSB;
525 s->sysv_has_lsb = true;
526 continue;
527 }
528
529 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
530 state = NORMAL;
531 continue;
532 }
533
534 t++;
535 t += strspn(t, WHITESPACE);
536
537 if (state == NORMAL) {
538
539 /* Try to parse Red Hat style chkconfig headers */
540
541 if (startswith_no_case(t, "chkconfig:")) {
542 int start_priority;
543 char runlevels[16], *k;
544
545 state = NORMAL;
546
547 if (sscanf(t+10, "%15s %i %*i",
548 runlevels,
549 &start_priority) != 2) {
550
551 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
552 continue;
553 }
554
555 /* A start priority gathered from the
556 * symlink farms is preferred over the
557 * data from the LSB header. */
558 if (start_priority < 0 || start_priority > 99)
559 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
560 else
561 s->sysv_start_priority = start_priority;
562
563 char_array_0(runlevels);
564 k = delete_chars(runlevels, WHITESPACE "-");
565
566 if (k[0]) {
567 char *d;
568
569 if (!(d = strdup(k))) {
570 r = -ENOMEM;
571 goto finish;
572 }
573
574 free(s->sysv_runlevels);
575 s->sysv_runlevels = d;
576 }
577
578 } else if (startswith_no_case(t, "description:")) {
579
580 size_t k = strlen(t);
581 char *d;
582 const char *j;
583
584 if (t[k-1] == '\\') {
585 state = DESCRIPTION;
586 t[k-1] = 0;
587 }
588
589 if ((j = strstrip(t+12)) && *j) {
590 if (!(d = strdup(j))) {
591 r = -ENOMEM;
592 goto finish;
593 }
594 } else
595 d = NULL;
596
597 free(chkconfig_description);
598 chkconfig_description = d;
599
600 } else if (startswith_no_case(t, "pidfile:")) {
601
602 char *fn;
603
604 state = NORMAL;
605
606 fn = strstrip(t+8);
607 if (!path_is_absolute(fn)) {
608 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
609 continue;
610 }
611
612 if (!(fn = strdup(fn))) {
613 r = -ENOMEM;
614 goto finish;
615 }
616
617 free(s->pid_file);
618 s->pid_file = fn;
619 }
620
621 } else if (state == DESCRIPTION) {
622
623 /* Try to parse Red Hat style description
624 * continuation */
625
626 size_t k = strlen(t);
627 char *j;
628
629 if (t[k-1] == '\\')
630 t[k-1] = 0;
631 else
632 state = NORMAL;
633
634 if ((j = strstrip(t)) && *j) {
635 char *d = NULL;
636
637 if (chkconfig_description)
638 d = join(chkconfig_description, " ", j, NULL);
639 else
640 d = strdup(j);
641
642 if (!d) {
643 r = -ENOMEM;
644 goto finish;
645 }
646
647 free(chkconfig_description);
648 chkconfig_description = d;
649 }
650
651 } else if (state == LSB || state == LSB_DESCRIPTION) {
652
653 if (startswith_no_case(t, "Provides:")) {
654 char *i, *w;
655 size_t z;
656
657 state = LSB;
658
659 FOREACH_WORD_QUOTED(w, z, t+9, i) {
660 char *n, *m;
661
662 if (!(n = strndup(w, z))) {
663 r = -ENOMEM;
664 goto finish;
665 }
666
667 r = sysv_translate_facility(n, file_name_from_path(path), &m);
668 free(n);
669
670 if (r < 0)
671 goto finish;
672
673 if (r == 0)
674 continue;
675
676 if (unit_name_to_type(m) == UNIT_SERVICE)
677 r = unit_add_name(u, m);
678 else
679 /* NB: SysV targets
680 * which are provided
681 * by a service are
682 * pulled in by the
683 * services, as an
684 * indication that the
685 * generic service is
686 * now available. This
687 * is strictly
688 * one-way. The
689 * targets do NOT pull
690 * in the SysV
691 * services! */
692 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
693
694 if (r < 0)
695 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
696
697 free(m);
698 }
699
700 } else if (startswith_no_case(t, "Required-Start:") ||
701 startswith_no_case(t, "Should-Start:") ||
702 startswith_no_case(t, "X-Start-Before:") ||
703 startswith_no_case(t, "X-Start-After:")) {
704 char *i, *w;
705 size_t z;
706
707 state = LSB;
708
709 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
710 char *n, *m;
711
712 if (!(n = strndup(w, z))) {
713 r = -ENOMEM;
714 goto finish;
715 }
716
717 r = sysv_translate_facility(n, file_name_from_path(path), &m);
718
719 if (r < 0) {
720 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
721 free(n);
722 continue;
723 }
724
725 free(n);
726
727 if (r == 0)
728 continue;
729
730 r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
731
732 if (r < 0)
733 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
734
735 free(m);
736 }
737 } else if (startswith_no_case(t, "Default-Start:")) {
738 char *k, *d;
739
740 state = LSB;
741
742 k = delete_chars(t+14, WHITESPACE "-");
743
744 if (k[0] != 0) {
745 if (!(d = strdup(k))) {
746 r = -ENOMEM;
747 goto finish;
748 }
749
750 free(s->sysv_runlevels);
751 s->sysv_runlevels = d;
752 }
753
754 } else if (startswith_no_case(t, "Description:")) {
755 char *d, *j;
756
757 state = LSB_DESCRIPTION;
758
759 if ((j = strstrip(t+12)) && *j) {
760 if (!(d = strdup(j))) {
761 r = -ENOMEM;
762 goto finish;
763 }
764 } else
765 d = NULL;
766
767 free(long_description);
768 long_description = d;
769
770 } else if (startswith_no_case(t, "Short-Description:")) {
771 char *d, *j;
772
773 state = LSB;
774
775 if ((j = strstrip(t+18)) && *j) {
776 if (!(d = strdup(j))) {
777 r = -ENOMEM;
778 goto finish;
779 }
780 } else
781 d = NULL;
782
783 free(short_description);
784 short_description = d;
785
786 } else if (state == LSB_DESCRIPTION) {
787
788 if (startswith(l, "#\t") || startswith(l, "# ")) {
789 char *j;
790
791 if ((j = strstrip(t)) && *j) {
792 char *d = NULL;
793
794 if (long_description)
795 d = join(long_description, " ", t, NULL);
796 else
797 d = strdup(j);
798
799 if (!d) {
800 r = -ENOMEM;
801 goto finish;
802 }
803
804 free(long_description);
805 long_description = d;
806 }
807
808 } else
809 state = LSB;
810 }
811 }
812 }
813
814 if ((r = sysv_exec_commands(s)) < 0)
815 goto finish;
816
817 if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
818 /* If there a runlevels configured for this service
819 * but none of the standard ones, then we assume this
820 * is some special kind of service (which might be
821 * needed for early boot) and don't create any links
822 * to it. */
823
824 s->meta.default_dependencies = false;
825
826 /* Don't timeout special services during boot (like fsck) */
827 s->timeout_usec = 0;
828 } else
829 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
830
831 /* Special setting for all SysV services */
832 s->type = SERVICE_FORKING;
833 s->remain_after_exit = !s->pid_file;
834 s->restart = SERVICE_RESTART_NO;
835 s->exec_context.std_output =
836 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
837 ? EXEC_OUTPUT_TTY : s->meta.manager->default_std_output;
838 s->exec_context.kill_mode = KILL_PROCESS;
839
840 /* We use the long description only if
841 * no short description is set. */
842
843 if (short_description)
844 description = short_description;
845 else if (chkconfig_description)
846 description = chkconfig_description;
847 else if (long_description)
848 description = long_description;
849 else
850 description = NULL;
851
852 if (description) {
853 char *d;
854
855 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
856 r = -ENOMEM;
857 goto finish;
858 }
859
860 u->meta.description = d;
861 }
862
863 /* The priority that has been set in /etc/rcN.d/ hierarchies
864 * takes precedence over what is stored as default in the LSB
865 * header */
866 if (s->sysv_start_priority_from_rcnd >= 0)
867 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
868
869 u->meta.load_state = UNIT_LOADED;
870 r = 0;
871
872 finish:
873
874 if (f)
875 fclose(f);
876
877 free(short_description);
878 free(long_description);
879 free(chkconfig_description);
880
881 return r;
882 }
883
884 static int service_load_sysv_name(Service *s, const char *name) {
885 char **p;
886
887 assert(s);
888 assert(name);
889
890 /* For SysV services we strip the boot.*, rc.* and *.sh
891 * prefixes/suffixes. */
892 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
893 if (endswith(name, ".sh.service"))
894 return -ENOENT;
895 #endif
896
897 #ifdef TARGET_SUSE
898 if (startswith(name, "boot."))
899 return -ENOENT;
900 #endif
901
902 #ifdef TARGET_FRUGALWARE
903 if (startswith(name, "rc."))
904 return -ENOENT;
905 #endif
906
907 STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
908 char *path;
909 int r;
910
911 path = join(*p, "/", name, NULL);
912 if (!path)
913 return -ENOMEM;
914
915 assert(endswith(path, ".service"));
916 path[strlen(path)-8] = 0;
917
918 r = service_load_sysv_path(s, path);
919
920 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
921 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
922 /* Try Debian style *.sh source'able init scripts */
923 strcat(path, ".sh");
924 r = service_load_sysv_path(s, path);
925 }
926 #endif
927 free(path);
928
929 #ifdef TARGET_SUSE
930 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
931 /* Try SUSE style boot.* init scripts */
932
933 path = join(*p, "/boot.", name, NULL);
934 if (!path)
935 return -ENOMEM;
936
937 /* Drop .service suffix */
938 path[strlen(path)-8] = 0;
939 r = service_load_sysv_path(s, path);
940 free(path);
941 }
942 #endif
943
944 #ifdef TARGET_FRUGALWARE
945 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
946 /* Try Frugalware style rc.* init scripts */
947
948 path = join(*p, "/rc.", name, NULL);
949 if (!path)
950 return -ENOMEM;
951
952 /* Drop .service suffix */
953 path[strlen(path)-8] = 0;
954 r = service_load_sysv_path(s, path);
955 free(path);
956 }
957 #endif
958
959 if (r < 0)
960 return r;
961
962 if ((s->meta.load_state != UNIT_STUB))
963 break;
964 }
965
966 return 0;
967 }
968
969 static int service_load_sysv(Service *s) {
970 const char *t;
971 Iterator i;
972 int r;
973
974 assert(s);
975
976 /* Load service data from SysV init scripts, preferably with
977 * LSB headers ... */
978
979 if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
980 return 0;
981
982 if ((t = s->meta.id))
983 if ((r = service_load_sysv_name(s, t)) < 0)
984 return r;
985
986 if (s->meta.load_state == UNIT_STUB)
987 SET_FOREACH(t, s->meta.names, i) {
988 if (t == s->meta.id)
989 continue;
990
991 if ((r = service_load_sysv_name(s, t)) < 0)
992 return r;
993
994 if (s->meta.load_state != UNIT_STUB)
995 break;
996 }
997
998 return 0;
999 }
1000 #endif
1001
1002 static int fsck_fix_order(Service *s) {
1003 Meta *other;
1004 int r;
1005
1006 assert(s);
1007
1008 if (s->fsck_passno <= 0)
1009 return 0;
1010
1011 /* For each pair of services where both have an fsck priority
1012 * we order things based on it. */
1013
1014 LIST_FOREACH(units_by_type, other, s->meta.manager->units_by_type[UNIT_SERVICE]) {
1015 Service *t;
1016 UnitDependency d;
1017
1018 t = (Service*) other;
1019
1020 if (s == t)
1021 continue;
1022
1023 if (t->meta.load_state != UNIT_LOADED)
1024 continue;
1025
1026 if (t->fsck_passno <= 0)
1027 continue;
1028
1029 if (t->fsck_passno < s->fsck_passno)
1030 d = UNIT_AFTER;
1031 else if (t->fsck_passno > s->fsck_passno)
1032 d = UNIT_BEFORE;
1033 else
1034 continue;
1035
1036 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1037 return r;
1038 }
1039
1040 return 0;
1041 }
1042
1043 static int service_verify(Service *s) {
1044 assert(s);
1045
1046 if (s->meta.load_state != UNIT_LOADED)
1047 return 0;
1048
1049 if (!s->exec_command[SERVICE_EXEC_START]) {
1050 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1051 return -EINVAL;
1052 }
1053
1054 if (s->type != SERVICE_ONESHOT &&
1055 s->exec_command[SERVICE_EXEC_START]->command_next) {
1056 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1057 return -EINVAL;
1058 }
1059
1060 if (s->type == SERVICE_ONESHOT &&
1061 s->exec_command[SERVICE_EXEC_RELOAD]) {
1062 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", s->meta.id);
1063 return -EINVAL;
1064 }
1065
1066 if (s->type == SERVICE_DBUS && !s->bus_name) {
1067 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1068 return -EINVAL;
1069 }
1070
1071 if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1072 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1073 return -EINVAL;
1074 }
1075
1076 return 0;
1077 }
1078
1079 static int service_add_default_dependencies(Service *s) {
1080 int r;
1081
1082 assert(s);
1083
1084 /* Add a number of automatic dependencies useful for the
1085 * majority of services. */
1086
1087 /* First, pull in base system */
1088 if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1089
1090 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1091 return r;
1092
1093 } else if (s->meta.manager->running_as == MANAGER_USER) {
1094
1095 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1096 return r;
1097 }
1098
1099 /* Second, activate normal shutdown */
1100 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1101 }
1102
1103 static int service_load(Unit *u) {
1104 int r;
1105 Service *s = SERVICE(u);
1106
1107 assert(s);
1108
1109 /* Load a .service file */
1110 if ((r = unit_load_fragment(u)) < 0)
1111 return r;
1112
1113 #ifdef HAVE_SYSV_COMPAT
1114 /* Load a classic init script as a fallback, if we couldn't find anything */
1115 if (u->meta.load_state == UNIT_STUB)
1116 if ((r = service_load_sysv(s)) < 0)
1117 return r;
1118 #endif
1119
1120 /* Still nothing found? Then let's give up */
1121 if (u->meta.load_state == UNIT_STUB)
1122 return -ENOENT;
1123
1124 /* We were able to load something, then let's add in the
1125 * dropin directories. */
1126 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1127 return r;
1128
1129 /* This is a new unit? Then let's add in some extras */
1130 if (u->meta.load_state == UNIT_LOADED) {
1131 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1132 return r;
1133
1134 if ((r = unit_add_default_cgroups(u)) < 0)
1135 return r;
1136
1137 #ifdef HAVE_SYSV_COMPAT
1138 if ((r = sysv_fix_order(s)) < 0)
1139 return r;
1140 #endif
1141
1142 if ((r = fsck_fix_order(s)) < 0)
1143 return r;
1144
1145 if (s->bus_name)
1146 if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1147 return r;
1148
1149 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1150 s->notify_access = NOTIFY_MAIN;
1151
1152 if (s->type == SERVICE_DBUS || s->bus_name)
1153 if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true)) < 0)
1154 return r;
1155
1156 if (s->meta.default_dependencies)
1157 if ((r = service_add_default_dependencies(s)) < 0)
1158 return r;
1159 }
1160
1161 return service_verify(s);
1162 }
1163
1164 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1165
1166 ServiceExecCommand c;
1167 Service *s = SERVICE(u);
1168 const char *prefix2;
1169 char *p2;
1170
1171 assert(s);
1172
1173 p2 = strappend(prefix, "\t");
1174 prefix2 = p2 ? p2 : prefix;
1175
1176 fprintf(f,
1177 "%sService State: %s\n"
1178 "%sPermissionsStartOnly: %s\n"
1179 "%sRootDirectoryStartOnly: %s\n"
1180 "%sRemainAfterExit: %s\n"
1181 "%sGuessMainPID: %s\n"
1182 "%sType: %s\n"
1183 "%sRestart: %s\n"
1184 "%sNotifyAccess: %s\n",
1185 prefix, service_state_to_string(s->state),
1186 prefix, yes_no(s->permissions_start_only),
1187 prefix, yes_no(s->root_directory_start_only),
1188 prefix, yes_no(s->remain_after_exit),
1189 prefix, yes_no(s->guess_main_pid),
1190 prefix, service_type_to_string(s->type),
1191 prefix, service_restart_to_string(s->restart),
1192 prefix, notify_access_to_string(s->notify_access));
1193
1194 if (s->control_pid > 0)
1195 fprintf(f,
1196 "%sControl PID: %lu\n",
1197 prefix, (unsigned long) s->control_pid);
1198
1199 if (s->main_pid > 0)
1200 fprintf(f,
1201 "%sMain PID: %lu\n"
1202 "%sMain PID Known: %s\n"
1203 "%sMain PID Alien: %s\n",
1204 prefix, (unsigned long) s->main_pid,
1205 prefix, yes_no(s->main_pid_known),
1206 prefix, yes_no(s->main_pid_alien));
1207
1208 if (s->pid_file)
1209 fprintf(f,
1210 "%sPIDFile: %s\n",
1211 prefix, s->pid_file);
1212
1213 if (s->bus_name)
1214 fprintf(f,
1215 "%sBusName: %s\n"
1216 "%sBus Name Good: %s\n",
1217 prefix, s->bus_name,
1218 prefix, yes_no(s->bus_name_good));
1219
1220 exec_context_dump(&s->exec_context, f, prefix);
1221
1222 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1223
1224 if (!s->exec_command[c])
1225 continue;
1226
1227 fprintf(f, "%s-> %s:\n",
1228 prefix, service_exec_command_to_string(c));
1229
1230 exec_command_dump_list(s->exec_command[c], f, prefix2);
1231 }
1232
1233 #ifdef HAVE_SYSV_COMPAT
1234 if (s->sysv_path)
1235 fprintf(f,
1236 "%sSysV Init Script Path: %s\n"
1237 "%sSysV Init Script has LSB Header: %s\n"
1238 "%sSysVEnabled: %s\n",
1239 prefix, s->sysv_path,
1240 prefix, yes_no(s->sysv_has_lsb),
1241 prefix, yes_no(s->sysv_enabled));
1242
1243 if (s->sysv_start_priority >= 0)
1244 fprintf(f,
1245 "%sSysVStartPriority: %i\n",
1246 prefix, s->sysv_start_priority);
1247
1248 if (s->sysv_runlevels)
1249 fprintf(f, "%sSysVRunLevels: %s\n",
1250 prefix, s->sysv_runlevels);
1251 #endif
1252
1253 if (s->fsck_passno > 0)
1254 fprintf(f,
1255 "%sFsckPassNo: %i\n",
1256 prefix, s->fsck_passno);
1257
1258 if (s->status_text)
1259 fprintf(f, "%sStatus Text: %s\n",
1260 prefix, s->status_text);
1261
1262 free(p2);
1263 }
1264
1265 static int service_load_pid_file(Service *s) {
1266 char *k;
1267 int r;
1268 pid_t pid;
1269
1270 assert(s);
1271
1272 if (!s->pid_file)
1273 return 0;
1274
1275 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1276 return r;
1277
1278 r = parse_pid(k, &pid);
1279 free(k);
1280
1281 if (r < 0)
1282 return r;
1283
1284 if (kill(pid, 0) < 0 && errno != EPERM) {
1285 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1286 (unsigned long) pid, s->pid_file);
1287 return -ESRCH;
1288 }
1289
1290 if (s->main_pid_known) {
1291 if (pid == s->main_pid)
1292 return 0;
1293
1294 log_debug("Main PID changing: %lu -> %lu",
1295 (unsigned long) s->main_pid, (unsigned long) pid);
1296 service_unwatch_main_pid(s);
1297 s->main_pid_known = false;
1298 }
1299
1300 if ((r = service_set_main_pid(s, pid)) < 0)
1301 return r;
1302
1303 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1304 /* FIXME: we need to do something here */
1305 return r;
1306
1307 return 0;
1308 }
1309
1310 static int service_search_main_pid(Service *s) {
1311 pid_t pid;
1312 int r;
1313
1314 assert(s);
1315
1316 /* If we know it anyway, don't ever fallback to unreliable
1317 * heuristics */
1318 if (s->main_pid_known)
1319 return 0;
1320
1321 if (!s->guess_main_pid)
1322 return 0;
1323
1324 assert(s->main_pid <= 0);
1325
1326 if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1327 return -ENOENT;
1328
1329 if ((r = service_set_main_pid(s, pid)) < 0)
1330 return r;
1331
1332 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1333 /* FIXME: we need to do something here */
1334 return r;
1335
1336 return 0;
1337 }
1338
1339 static int service_get_sockets(Service *s, Set **_set) {
1340 Set *set;
1341 Iterator i;
1342 char *t;
1343 int r;
1344
1345 assert(s);
1346 assert(_set);
1347
1348 if (s->socket_fd >= 0)
1349 return 0;
1350
1351 if (!set_isempty(s->configured_sockets))
1352 return 0;
1353
1354 /* Collects all Socket objects that belong to this
1355 * service. Note that a service might have multiple sockets
1356 * via multiple names. */
1357
1358 if (!(set = set_new(NULL, NULL)))
1359 return -ENOMEM;
1360
1361 SET_FOREACH(t, s->meta.names, i) {
1362 char *k;
1363 Unit *p;
1364
1365 /* Look for all socket objects that go by any of our
1366 * units and collect their fds */
1367
1368 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1369 r = -ENOMEM;
1370 goto fail;
1371 }
1372
1373 p = manager_get_unit(s->meta.manager, k);
1374 free(k);
1375
1376 if (!p)
1377 continue;
1378
1379 if ((r = set_put(set, p)) < 0)
1380 goto fail;
1381 }
1382
1383 *_set = set;
1384 return 0;
1385
1386 fail:
1387 set_free(set);
1388 return r;
1389 }
1390
1391 static int service_notify_sockets_dead(Service *s) {
1392 Iterator i;
1393 Set *set, *free_set = NULL;
1394 Socket *sock;
1395 int r;
1396
1397 assert(s);
1398
1399 /* Notifies all our sockets when we die */
1400
1401 if (s->socket_fd >= 0)
1402 return 0;
1403
1404 if (!set_isempty(s->configured_sockets))
1405 set = s->configured_sockets;
1406 else {
1407 if ((r = service_get_sockets(s, &free_set)) < 0)
1408 return r;
1409
1410 set = free_set;
1411 }
1412
1413 SET_FOREACH(sock, set, i)
1414 socket_notify_service_dead(sock);
1415
1416 set_free(free_set);
1417
1418 return 0;
1419 }
1420
1421 static void service_set_state(Service *s, ServiceState state) {
1422 ServiceState old_state;
1423 assert(s);
1424
1425 old_state = s->state;
1426 s->state = state;
1427
1428 if (state != SERVICE_START_PRE &&
1429 state != SERVICE_START &&
1430 state != SERVICE_START_POST &&
1431 state != SERVICE_RELOAD &&
1432 state != SERVICE_STOP &&
1433 state != SERVICE_STOP_SIGTERM &&
1434 state != SERVICE_STOP_SIGKILL &&
1435 state != SERVICE_STOP_POST &&
1436 state != SERVICE_FINAL_SIGTERM &&
1437 state != SERVICE_FINAL_SIGKILL &&
1438 state != SERVICE_AUTO_RESTART)
1439 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1440
1441 if (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 service_unwatch_main_pid(s);
1449 s->main_command = NULL;
1450 }
1451
1452 if (state != SERVICE_START_PRE &&
1453 state != SERVICE_START &&
1454 state != SERVICE_START_POST &&
1455 state != SERVICE_RELOAD &&
1456 state != SERVICE_STOP &&
1457 state != SERVICE_STOP_SIGTERM &&
1458 state != SERVICE_STOP_SIGKILL &&
1459 state != SERVICE_STOP_POST &&
1460 state != SERVICE_FINAL_SIGTERM &&
1461 state != SERVICE_FINAL_SIGKILL) {
1462 service_unwatch_control_pid(s);
1463 s->control_command = NULL;
1464 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1465 }
1466
1467 if (state == SERVICE_DEAD ||
1468 state == SERVICE_STOP ||
1469 state == SERVICE_STOP_SIGTERM ||
1470 state == SERVICE_STOP_SIGKILL ||
1471 state == SERVICE_STOP_POST ||
1472 state == SERVICE_FINAL_SIGTERM ||
1473 state == SERVICE_FINAL_SIGKILL ||
1474 state == SERVICE_FAILED ||
1475 state == SERVICE_AUTO_RESTART)
1476 service_notify_sockets_dead(s);
1477
1478 if (state != SERVICE_START_PRE &&
1479 state != SERVICE_START &&
1480 state != SERVICE_START_POST &&
1481 state != SERVICE_RUNNING &&
1482 state != SERVICE_RELOAD &&
1483 state != SERVICE_STOP &&
1484 state != SERVICE_STOP_SIGTERM &&
1485 state != SERVICE_STOP_SIGKILL &&
1486 state != SERVICE_STOP_POST &&
1487 state != SERVICE_FINAL_SIGTERM &&
1488 state != SERVICE_FINAL_SIGKILL &&
1489 !(state == SERVICE_DEAD && s->meta.job)) {
1490 service_close_socket_fd(s);
1491 service_connection_unref(s);
1492 }
1493
1494 /* For the inactive states unit_notify() will trim the cgroup,
1495 * but for exit we have to do that ourselves... */
1496 if (state == SERVICE_EXITED && s->meta.manager->n_reloading <= 0)
1497 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1498
1499 if (old_state != state)
1500 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1501
1502 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1503 s->reload_failure = false;
1504 }
1505
1506 static int service_coldplug(Unit *u) {
1507 Service *s = SERVICE(u);
1508 int r;
1509
1510 assert(s);
1511 assert(s->state == SERVICE_DEAD);
1512
1513 if (s->deserialized_state != s->state) {
1514
1515 if (s->deserialized_state == SERVICE_START_PRE ||
1516 s->deserialized_state == SERVICE_START ||
1517 s->deserialized_state == SERVICE_START_POST ||
1518 s->deserialized_state == SERVICE_RELOAD ||
1519 s->deserialized_state == SERVICE_STOP ||
1520 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1521 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1522 s->deserialized_state == SERVICE_STOP_POST ||
1523 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1524 s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1525 s->deserialized_state == SERVICE_AUTO_RESTART) {
1526
1527 if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1528 usec_t k;
1529
1530 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1531
1532 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1533 return r;
1534 }
1535 }
1536
1537 if ((s->deserialized_state == SERVICE_START &&
1538 (s->type == SERVICE_FORKING ||
1539 s->type == SERVICE_DBUS ||
1540 s->type == SERVICE_ONESHOT ||
1541 s->type == SERVICE_NOTIFY)) ||
1542 s->deserialized_state == SERVICE_START_POST ||
1543 s->deserialized_state == SERVICE_RUNNING ||
1544 s->deserialized_state == SERVICE_RELOAD ||
1545 s->deserialized_state == SERVICE_STOP ||
1546 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1547 s->deserialized_state == SERVICE_STOP_SIGKILL)
1548 if (s->main_pid > 0)
1549 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1550 return r;
1551
1552 if (s->deserialized_state == SERVICE_START_PRE ||
1553 s->deserialized_state == SERVICE_START ||
1554 s->deserialized_state == SERVICE_START_POST ||
1555 s->deserialized_state == SERVICE_RELOAD ||
1556 s->deserialized_state == SERVICE_STOP ||
1557 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1558 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1559 s->deserialized_state == SERVICE_STOP_POST ||
1560 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1561 s->deserialized_state == SERVICE_FINAL_SIGKILL)
1562 if (s->control_pid > 0)
1563 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1564 return r;
1565
1566 service_set_state(s, s->deserialized_state);
1567 }
1568
1569 return 0;
1570 }
1571
1572 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1573 Iterator i;
1574 int r;
1575 int *rfds = NULL;
1576 unsigned rn_fds = 0;
1577 Set *set, *free_set = NULL;
1578 Socket *sock;
1579
1580 assert(s);
1581 assert(fds);
1582 assert(n_fds);
1583
1584 if (s->socket_fd >= 0)
1585 return 0;
1586
1587 if (!set_isempty(s->configured_sockets))
1588 set = s->configured_sockets;
1589 else {
1590 if ((r = service_get_sockets(s, &free_set)) < 0)
1591 return r;
1592
1593 set = free_set;
1594 }
1595
1596 SET_FOREACH(sock, set, i) {
1597 int *cfds;
1598 unsigned cn_fds;
1599
1600 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1601 goto fail;
1602
1603 if (!cfds)
1604 continue;
1605
1606 if (!rfds) {
1607 rfds = cfds;
1608 rn_fds = cn_fds;
1609 } else {
1610 int *t;
1611
1612 if (!(t = new(int, rn_fds+cn_fds))) {
1613 free(cfds);
1614 r = -ENOMEM;
1615 goto fail;
1616 }
1617
1618 memcpy(t, rfds, rn_fds * sizeof(int));
1619 memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1620 free(rfds);
1621 free(cfds);
1622
1623 rfds = t;
1624 rn_fds = rn_fds+cn_fds;
1625 }
1626 }
1627
1628 *fds = rfds;
1629 *n_fds = rn_fds;
1630
1631 set_free(free_set);
1632
1633 return 0;
1634
1635 fail:
1636 set_free(set);
1637 free(rfds);
1638
1639 return r;
1640 }
1641
1642 static int service_spawn(
1643 Service *s,
1644 ExecCommand *c,
1645 bool timeout,
1646 bool pass_fds,
1647 bool apply_permissions,
1648 bool apply_chroot,
1649 bool apply_tty_stdin,
1650 bool set_notify_socket,
1651 pid_t *_pid) {
1652
1653 pid_t pid;
1654 int r;
1655 int *fds = NULL, *fdsbuf = NULL;
1656 unsigned n_fds = 0, n_env = 0;
1657 char **argv = NULL, **final_env = NULL, **our_env = NULL;
1658
1659 assert(s);
1660 assert(c);
1661 assert(_pid);
1662
1663 if (pass_fds ||
1664 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1665 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1666 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1667
1668 if (s->socket_fd >= 0) {
1669 fds = &s->socket_fd;
1670 n_fds = 1;
1671 } else {
1672 if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1673 goto fail;
1674
1675 fds = fdsbuf;
1676 }
1677 }
1678
1679 if (timeout && s->timeout_usec) {
1680 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1681 goto fail;
1682 } else
1683 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1684
1685 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1686 r = -ENOMEM;
1687 goto fail;
1688 }
1689
1690 if (!(our_env = new0(char*, 4))) {
1691 r = -ENOMEM;
1692 goto fail;
1693 }
1694
1695 if (set_notify_socket)
1696 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", s->meta.manager->notify_socket) < 0) {
1697 r = -ENOMEM;
1698 goto fail;
1699 }
1700
1701 if (s->main_pid > 0)
1702 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1703 r = -ENOMEM;
1704 goto fail;
1705 }
1706
1707 if (!(final_env = strv_env_merge(2,
1708 s->meta.manager->environment,
1709 our_env,
1710 NULL))) {
1711 r = -ENOMEM;
1712 goto fail;
1713 }
1714
1715 r = exec_spawn(c,
1716 argv,
1717 &s->exec_context,
1718 fds, n_fds,
1719 final_env,
1720 apply_permissions,
1721 apply_chroot,
1722 apply_tty_stdin,
1723 s->meta.manager->confirm_spawn,
1724 s->meta.cgroup_bondings,
1725 s->meta.cgroup_attributes,
1726 &pid);
1727
1728 if (r < 0)
1729 goto fail;
1730
1731
1732 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1733 /* FIXME: we need to do something here */
1734 goto fail;
1735
1736 free(fdsbuf);
1737 strv_free(argv);
1738 strv_free(our_env);
1739 strv_free(final_env);
1740
1741 *_pid = pid;
1742
1743 return 0;
1744
1745 fail:
1746 free(fdsbuf);
1747 strv_free(argv);
1748 strv_free(our_env);
1749 strv_free(final_env);
1750
1751 if (timeout)
1752 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1753
1754 return r;
1755 }
1756
1757 static int main_pid_good(Service *s) {
1758 assert(s);
1759
1760 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1761 * don't know */
1762
1763 /* If we know the pid file, then lets just check if it is
1764 * still valid */
1765 if (s->main_pid_known) {
1766
1767 /* If it's an alien child let's check if it is still
1768 * alive ... */
1769 if (s->main_pid_alien)
1770 return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1771
1772 /* .. otherwise assume we'll get a SIGCHLD for it,
1773 * which we really should wait for to collect exit
1774 * status and code */
1775 return s->main_pid > 0;
1776 }
1777
1778 /* We don't know the pid */
1779 return -EAGAIN;
1780 }
1781
1782 static int control_pid_good(Service *s) {
1783 assert(s);
1784
1785 return s->control_pid > 0;
1786 }
1787
1788 static int cgroup_good(Service *s) {
1789 int r;
1790
1791 assert(s);
1792
1793 if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1794 return r;
1795
1796 return !r;
1797 }
1798
1799 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1800 int r;
1801 assert(s);
1802
1803 if (!success)
1804 s->failure = true;
1805
1806 if (allow_restart &&
1807 !s->forbid_restart &&
1808 (s->restart == SERVICE_RESTART_ALWAYS ||
1809 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1810 (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1811 (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1812 (s->main_exec_status.code == CLD_KILLED ||
1813 s->main_exec_status.code == CLD_DUMPED)))) {
1814
1815 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1816 goto fail;
1817
1818 service_set_state(s, SERVICE_AUTO_RESTART);
1819 } else
1820 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1821
1822 s->forbid_restart = false;
1823
1824 return;
1825
1826 fail:
1827 log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1828 service_enter_dead(s, false, false);
1829 }
1830
1831 static void service_enter_signal(Service *s, ServiceState state, bool success);
1832
1833 static void service_enter_stop_post(Service *s, bool success) {
1834 int r;
1835 assert(s);
1836
1837 if (!success)
1838 s->failure = true;
1839
1840 service_unwatch_control_pid(s);
1841
1842 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1843 s->control_command_id = SERVICE_EXEC_STOP_POST;
1844
1845 if ((r = service_spawn(s,
1846 s->control_command,
1847 true,
1848 false,
1849 !s->permissions_start_only,
1850 !s->root_directory_start_only,
1851 true,
1852 false,
1853 &s->control_pid)) < 0)
1854 goto fail;
1855
1856
1857 service_set_state(s, SERVICE_STOP_POST);
1858 } else
1859 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1860
1861 return;
1862
1863 fail:
1864 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1865 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1866 }
1867
1868 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1869 int r;
1870 Set *pid_set = NULL;
1871 bool wait_for_exit = false;
1872
1873 assert(s);
1874
1875 if (!success)
1876 s->failure = true;
1877
1878 if (s->exec_context.kill_mode != KILL_NONE) {
1879 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1880
1881 if (s->main_pid > 0) {
1882 if (kill_and_sigcont(s->main_pid, sig) < 0 && errno != ESRCH)
1883 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1884 else
1885 wait_for_exit = !s->main_pid_alien;
1886 }
1887
1888 if (s->control_pid > 0) {
1889 if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1890 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1891 else
1892 wait_for_exit = true;
1893 }
1894
1895 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1896
1897 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1898 r = -ENOMEM;
1899 goto fail;
1900 }
1901
1902 /* Exclude the main/control pids from being killed via the cgroup */
1903 if (s->main_pid > 0)
1904 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1905 goto fail;
1906
1907 if (s->control_pid > 0)
1908 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1909 goto fail;
1910
1911 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
1912 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1913 log_warning("Failed to kill control group: %s", strerror(-r));
1914 } else if (r > 0)
1915 wait_for_exit = true;
1916
1917 set_free(pid_set);
1918 pid_set = NULL;
1919 }
1920 }
1921
1922 if (wait_for_exit) {
1923 if (s->timeout_usec > 0)
1924 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1925 goto fail;
1926
1927 service_set_state(s, state);
1928 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1929 service_enter_stop_post(s, true);
1930 else
1931 service_enter_dead(s, true, true);
1932
1933 return;
1934
1935 fail:
1936 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1937
1938 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1939 service_enter_stop_post(s, false);
1940 else
1941 service_enter_dead(s, false, true);
1942
1943 if (pid_set)
1944 set_free(pid_set);
1945 }
1946
1947 static void service_enter_stop(Service *s, bool success) {
1948 int r;
1949
1950 assert(s);
1951
1952 if (!success)
1953 s->failure = true;
1954
1955 service_unwatch_control_pid(s);
1956
1957 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1958 s->control_command_id = SERVICE_EXEC_STOP;
1959
1960 if ((r = service_spawn(s,
1961 s->control_command,
1962 true,
1963 false,
1964 !s->permissions_start_only,
1965 !s->root_directory_start_only,
1966 false,
1967 false,
1968 &s->control_pid)) < 0)
1969 goto fail;
1970
1971 service_set_state(s, SERVICE_STOP);
1972 } else
1973 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1974
1975 return;
1976
1977 fail:
1978 log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1979 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1980 }
1981
1982 static void service_enter_running(Service *s, bool success) {
1983 int main_pid_ok, cgroup_ok;
1984 assert(s);
1985
1986 if (!success)
1987 s->failure = true;
1988
1989 main_pid_ok = main_pid_good(s);
1990 cgroup_ok = cgroup_good(s);
1991
1992 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1993 (s->bus_name_good || s->type != SERVICE_DBUS))
1994 service_set_state(s, SERVICE_RUNNING);
1995 else if (s->remain_after_exit)
1996 service_set_state(s, SERVICE_EXITED);
1997 else
1998 service_enter_stop(s, true);
1999 }
2000
2001 static void service_enter_start_post(Service *s) {
2002 int r;
2003 assert(s);
2004
2005 service_unwatch_control_pid(s);
2006
2007 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
2008 s->control_command_id = SERVICE_EXEC_START_POST;
2009
2010 if ((r = service_spawn(s,
2011 s->control_command,
2012 true,
2013 false,
2014 !s->permissions_start_only,
2015 !s->root_directory_start_only,
2016 false,
2017 false,
2018 &s->control_pid)) < 0)
2019 goto fail;
2020
2021 service_set_state(s, SERVICE_START_POST);
2022 } else
2023 service_enter_running(s, true);
2024
2025 return;
2026
2027 fail:
2028 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
2029 service_enter_stop(s, false);
2030 }
2031
2032 static void service_enter_start(Service *s) {
2033 pid_t pid;
2034 int r;
2035 ExecCommand *c;
2036
2037 assert(s);
2038
2039 assert(s->exec_command[SERVICE_EXEC_START]);
2040 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2041
2042 if (s->type == SERVICE_FORKING)
2043 service_unwatch_control_pid(s);
2044 else
2045 service_unwatch_main_pid(s);
2046
2047 if (s->type == SERVICE_FORKING) {
2048 s->control_command_id = SERVICE_EXEC_START;
2049 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2050
2051 s->main_command = NULL;
2052 } else {
2053 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2054 s->control_command = NULL;
2055
2056 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2057 }
2058
2059 if ((r = service_spawn(s,
2060 c,
2061 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2062 true,
2063 true,
2064 true,
2065 true,
2066 s->notify_access != NOTIFY_NONE,
2067 &pid)) < 0)
2068 goto fail;
2069
2070 if (s->type == SERVICE_SIMPLE) {
2071 /* For simple services we immediately start
2072 * the START_POST binaries. */
2073
2074 service_set_main_pid(s, pid);
2075 service_enter_start_post(s);
2076
2077 } else if (s->type == SERVICE_FORKING) {
2078
2079 /* For forking services we wait until the start
2080 * process exited. */
2081
2082 s->control_pid = pid;
2083 service_set_state(s, SERVICE_START);
2084
2085 } else if (s->type == SERVICE_ONESHOT ||
2086 s->type == SERVICE_DBUS ||
2087 s->type == SERVICE_NOTIFY) {
2088
2089 /* For oneshot services we wait until the start
2090 * process exited, too, but it is our main process. */
2091
2092 /* For D-Bus services we know the main pid right away,
2093 * but wait for the bus name to appear on the
2094 * bus. Notify services are similar. */
2095
2096 service_set_main_pid(s, pid);
2097 service_set_state(s, SERVICE_START);
2098 } else
2099 assert_not_reached("Unknown service type");
2100
2101 return;
2102
2103 fail:
2104 log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2105 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2106 }
2107
2108 static void service_enter_start_pre(Service *s) {
2109 int r;
2110
2111 assert(s);
2112
2113 service_unwatch_control_pid(s);
2114
2115 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2116 s->control_command_id = SERVICE_EXEC_START_PRE;
2117
2118 if ((r = service_spawn(s,
2119 s->control_command,
2120 true,
2121 false,
2122 !s->permissions_start_only,
2123 !s->root_directory_start_only,
2124 true,
2125 false,
2126 &s->control_pid)) < 0)
2127 goto fail;
2128
2129 service_set_state(s, SERVICE_START_PRE);
2130 } else
2131 service_enter_start(s);
2132
2133 return;
2134
2135 fail:
2136 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2137 service_enter_dead(s, false, true);
2138 }
2139
2140 static void service_enter_restart(Service *s) {
2141 int r;
2142 DBusError error;
2143
2144 assert(s);
2145 dbus_error_init(&error);
2146
2147 if (s->meta.job) {
2148 log_info("Job pending for unit, delaying automatic restart.");
2149
2150 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2151 goto fail;
2152 }
2153
2154 service_enter_dead(s, true, false);
2155
2156 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2157 goto fail;
2158
2159 log_debug("%s scheduled restart job.", s->meta.id);
2160 return;
2161
2162 fail:
2163 log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2164 service_enter_dead(s, false, false);
2165
2166 dbus_error_free(&error);
2167 }
2168
2169 static void service_enter_reload(Service *s) {
2170 int r;
2171
2172 assert(s);
2173
2174 service_unwatch_control_pid(s);
2175
2176 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2177 s->control_command_id = SERVICE_EXEC_RELOAD;
2178
2179 if ((r = service_spawn(s,
2180 s->control_command,
2181 true,
2182 false,
2183 !s->permissions_start_only,
2184 !s->root_directory_start_only,
2185 false,
2186 false,
2187 &s->control_pid)) < 0)
2188 goto fail;
2189
2190 service_set_state(s, SERVICE_RELOAD);
2191 } else
2192 service_enter_running(s, true);
2193
2194 return;
2195
2196 fail:
2197 log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2198 s->reload_failure = true;
2199 service_enter_running(s, true);
2200 }
2201
2202 static void service_run_next_control(Service *s, bool success) {
2203 int r;
2204
2205 assert(s);
2206 assert(s->control_command);
2207 assert(s->control_command->command_next);
2208
2209 if (!success)
2210 s->failure = true;
2211
2212 assert(s->control_command_id != SERVICE_EXEC_START);
2213
2214 s->control_command = s->control_command->command_next;
2215 service_unwatch_control_pid(s);
2216
2217 if ((r = service_spawn(s,
2218 s->control_command,
2219 true,
2220 false,
2221 !s->permissions_start_only,
2222 !s->root_directory_start_only,
2223 s->control_command_id == SERVICE_EXEC_START_PRE ||
2224 s->control_command_id == SERVICE_EXEC_STOP_POST,
2225 false,
2226 &s->control_pid)) < 0)
2227 goto fail;
2228
2229 return;
2230
2231 fail:
2232 log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2233
2234 if (s->state == SERVICE_START_PRE)
2235 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2236 else if (s->state == SERVICE_STOP)
2237 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2238 else if (s->state == SERVICE_STOP_POST)
2239 service_enter_dead(s, false, true);
2240 else if (s->state == SERVICE_RELOAD) {
2241 s->reload_failure = true;
2242 service_enter_running(s, true);
2243 } else
2244 service_enter_stop(s, false);
2245 }
2246
2247 static void service_run_next_main(Service *s, bool success) {
2248 pid_t pid;
2249 int r;
2250
2251 assert(s);
2252 assert(s->main_command);
2253 assert(s->main_command->command_next);
2254 assert(s->type == SERVICE_ONESHOT);
2255
2256 if (!success)
2257 s->failure = true;
2258
2259 s->main_command = s->main_command->command_next;
2260 service_unwatch_main_pid(s);
2261
2262 if ((r = service_spawn(s,
2263 s->main_command,
2264 false,
2265 true,
2266 true,
2267 true,
2268 true,
2269 s->notify_access != NOTIFY_NONE,
2270 &pid)) < 0)
2271 goto fail;
2272
2273 service_set_main_pid(s, pid);
2274
2275 return;
2276
2277 fail:
2278 log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2279 service_enter_stop(s, false);
2280 }
2281
2282 static int service_start(Unit *u) {
2283 Service *s = SERVICE(u);
2284
2285 assert(s);
2286
2287 /* We cannot fulfill this request right now, try again later
2288 * please! */
2289 if (s->state == SERVICE_STOP ||
2290 s->state == SERVICE_STOP_SIGTERM ||
2291 s->state == SERVICE_STOP_SIGKILL ||
2292 s->state == SERVICE_STOP_POST ||
2293 s->state == SERVICE_FINAL_SIGTERM ||
2294 s->state == SERVICE_FINAL_SIGKILL)
2295 return -EAGAIN;
2296
2297 /* Already on it! */
2298 if (s->state == SERVICE_START_PRE ||
2299 s->state == SERVICE_START ||
2300 s->state == SERVICE_START_POST)
2301 return 0;
2302
2303 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2304
2305 /* Make sure we don't enter a busy loop of some kind. */
2306 if (!ratelimit_test(&s->ratelimit)) {
2307 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2308 return -ECANCELED;
2309 }
2310
2311 s->failure = false;
2312 s->main_pid_known = false;
2313 s->main_pid_alien = false;
2314 s->forbid_restart = false;
2315
2316 service_enter_start_pre(s);
2317 return 0;
2318 }
2319
2320 static int service_stop(Unit *u) {
2321 Service *s = SERVICE(u);
2322
2323 assert(s);
2324
2325 /* This is a user request, so don't do restarts on this
2326 * shutdown. */
2327 s->forbid_restart = true;
2328
2329 /* Already on it */
2330 if (s->state == SERVICE_STOP ||
2331 s->state == SERVICE_STOP_SIGTERM ||
2332 s->state == SERVICE_STOP_SIGKILL ||
2333 s->state == SERVICE_STOP_POST ||
2334 s->state == SERVICE_FINAL_SIGTERM ||
2335 s->state == SERVICE_FINAL_SIGKILL)
2336 return 0;
2337
2338 /* Don't allow a restart */
2339 if (s->state == SERVICE_AUTO_RESTART) {
2340 service_set_state(s, SERVICE_DEAD);
2341 return 0;
2342 }
2343
2344 /* If there's already something running we go directly into
2345 * kill mode. */
2346 if (s->state == SERVICE_START_PRE ||
2347 s->state == SERVICE_START ||
2348 s->state == SERVICE_START_POST ||
2349 s->state == SERVICE_RELOAD) {
2350 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2351 return 0;
2352 }
2353
2354 assert(s->state == SERVICE_RUNNING ||
2355 s->state == SERVICE_EXITED);
2356
2357 service_enter_stop(s, true);
2358 return 0;
2359 }
2360
2361 static int service_reload(Unit *u) {
2362 Service *s = SERVICE(u);
2363
2364 assert(s);
2365
2366 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2367
2368 service_enter_reload(s);
2369 return 0;
2370 }
2371
2372 static bool service_can_reload(Unit *u) {
2373 Service *s = SERVICE(u);
2374
2375 assert(s);
2376
2377 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2378 }
2379
2380 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2381 Service *s = SERVICE(u);
2382
2383 assert(u);
2384 assert(f);
2385 assert(fds);
2386
2387 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2388 unit_serialize_item(u, f, "failure", yes_no(s->failure));
2389
2390 if (s->control_pid > 0)
2391 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2392
2393 if (s->main_pid_known && s->main_pid > 0)
2394 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2395
2396 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2397
2398 if (s->status_text)
2399 unit_serialize_item(u, f, "status-text", s->status_text);
2400
2401 /* There's a minor uncleanliness here: if there are multiple
2402 * commands attached here, we will start from the first one
2403 * again */
2404 if (s->control_command_id >= 0)
2405 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2406
2407 if (s->socket_fd >= 0) {
2408 int copy;
2409
2410 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2411 return copy;
2412
2413 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2414 }
2415
2416 if (s->main_exec_status.pid > 0) {
2417 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2418 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2419 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2420
2421 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2422 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2423 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2424 }
2425 }
2426
2427 return 0;
2428 }
2429
2430 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2431 Service *s = SERVICE(u);
2432
2433 assert(u);
2434 assert(key);
2435 assert(value);
2436 assert(fds);
2437
2438 if (streq(key, "state")) {
2439 ServiceState state;
2440
2441 if ((state = service_state_from_string(value)) < 0)
2442 log_debug("Failed to parse state value %s", value);
2443 else
2444 s->deserialized_state = state;
2445 } else if (streq(key, "failure")) {
2446 int b;
2447
2448 if ((b = parse_boolean(value)) < 0)
2449 log_debug("Failed to parse failure value %s", value);
2450 else
2451 s->failure = b || s->failure;
2452 } else if (streq(key, "control-pid")) {
2453 pid_t pid;
2454
2455 if (parse_pid(value, &pid) < 0)
2456 log_debug("Failed to parse control-pid value %s", value);
2457 else
2458 s->control_pid = pid;
2459 } else if (streq(key, "main-pid")) {
2460 pid_t pid;
2461
2462 if (parse_pid(value, &pid) < 0)
2463 log_debug("Failed to parse main-pid value %s", value);
2464 else
2465 service_set_main_pid(s, (pid_t) pid);
2466 } else if (streq(key, "main-pid-known")) {
2467 int b;
2468
2469 if ((b = parse_boolean(value)) < 0)
2470 log_debug("Failed to parse main-pid-known value %s", value);
2471 else
2472 s->main_pid_known = b;
2473 } else if (streq(key, "status-text")) {
2474 char *t;
2475
2476 if ((t = strdup(value))) {
2477 free(s->status_text);
2478 s->status_text = t;
2479 }
2480
2481 } else if (streq(key, "control-command")) {
2482 ServiceExecCommand id;
2483
2484 if ((id = service_exec_command_from_string(value)) < 0)
2485 log_debug("Failed to parse exec-command value %s", value);
2486 else {
2487 s->control_command_id = id;
2488 s->control_command = s->exec_command[id];
2489 }
2490 } else if (streq(key, "socket-fd")) {
2491 int fd;
2492
2493 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2494 log_debug("Failed to parse socket-fd value %s", value);
2495 else {
2496
2497 if (s->socket_fd >= 0)
2498 close_nointr_nofail(s->socket_fd);
2499 s->socket_fd = fdset_remove(fds, fd);
2500 }
2501 } else if (streq(key, "main-exec-status-pid")) {
2502 pid_t pid;
2503
2504 if (parse_pid(value, &pid) < 0)
2505 log_debug("Failed to parse main-exec-status-pid value %s", value);
2506 else
2507 s->main_exec_status.pid = pid;
2508 } else if (streq(key, "main-exec-status-code")) {
2509 int i;
2510
2511 if (safe_atoi(value, &i) < 0)
2512 log_debug("Failed to parse main-exec-status-code value %s", value);
2513 else
2514 s->main_exec_status.code = i;
2515 } else if (streq(key, "main-exec-status-status")) {
2516 int i;
2517
2518 if (safe_atoi(value, &i) < 0)
2519 log_debug("Failed to parse main-exec-status-status value %s", value);
2520 else
2521 s->main_exec_status.status = i;
2522 } else if (streq(key, "main-exec-status-start"))
2523 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2524 else if (streq(key, "main-exec-status-exit"))
2525 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2526 else
2527 log_debug("Unknown serialization key '%s'", key);
2528
2529 return 0;
2530 }
2531
2532 static UnitActiveState service_active_state(Unit *u) {
2533 assert(u);
2534
2535 return state_translation_table[SERVICE(u)->state];
2536 }
2537
2538 static const char *service_sub_state_to_string(Unit *u) {
2539 assert(u);
2540
2541 return service_state_to_string(SERVICE(u)->state);
2542 }
2543
2544 static bool service_check_gc(Unit *u) {
2545 Service *s = SERVICE(u);
2546
2547 assert(s);
2548
2549 /* Never clean up services that still have a process around,
2550 * even if the service is formally dead. */
2551 if (cgroup_good(s) > 0 ||
2552 main_pid_good(s) > 0 ||
2553 control_pid_good(s) > 0)
2554 return true;
2555
2556 #ifdef HAVE_SYSV_COMPAT
2557 if (s->sysv_path)
2558 return true;
2559 #endif
2560
2561 return false;
2562 }
2563
2564 static bool service_check_snapshot(Unit *u) {
2565 Service *s = SERVICE(u);
2566
2567 assert(s);
2568
2569 return !s->got_socket_fd;
2570 }
2571
2572 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2573 Service *s = SERVICE(u);
2574 bool success;
2575
2576 assert(s);
2577 assert(pid >= 0);
2578
2579 if (!s->meta.fragment_path)
2580 success = is_clean_exit_lsb(code, status);
2581 else
2582 success = is_clean_exit(code, status);
2583
2584 if (s->main_pid == pid) {
2585 /* Forking services may occasionally move to a new PID.
2586 * As long as they update the PID file before exiting the old
2587 * PID, they're fine. */
2588 if (s->pid_file && service_load_pid_file(s) == 0)
2589 return;
2590
2591 s->main_pid = 0;
2592 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2593
2594 /* If this is not a forking service than the main
2595 * process got started and hence we copy the exit
2596 * status so that it is recorded both as main and as
2597 * control process exit status */
2598 if (s->main_command) {
2599 s->main_command->exec_status = s->main_exec_status;
2600
2601 if (s->main_command->ignore)
2602 success = true;
2603 }
2604
2605 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2606 "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2607 s->failure = s->failure || !success;
2608
2609 if (s->main_command &&
2610 s->main_command->command_next &&
2611 success) {
2612
2613 /* There is another command to *
2614 * execute, so let's do that. */
2615
2616 log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2617 service_run_next_main(s, success);
2618
2619 } else {
2620
2621 /* The service exited, so the service is officially
2622 * gone. */
2623 s->main_command = NULL;
2624
2625 switch (s->state) {
2626
2627 case SERVICE_START_POST:
2628 case SERVICE_RELOAD:
2629 case SERVICE_STOP:
2630 /* Need to wait until the operation is
2631 * done */
2632 break;
2633
2634 case SERVICE_START:
2635 if (s->type == SERVICE_ONESHOT) {
2636 /* This was our main goal, so let's go on */
2637 if (success)
2638 service_enter_start_post(s);
2639 else
2640 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2641 break;
2642 } else {
2643 assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2644
2645 /* Fall through */
2646 }
2647
2648 case SERVICE_RUNNING:
2649 service_enter_running(s, success);
2650 break;
2651
2652 case SERVICE_STOP_SIGTERM:
2653 case SERVICE_STOP_SIGKILL:
2654
2655 if (!control_pid_good(s))
2656 service_enter_stop_post(s, success);
2657
2658 /* If there is still a control process, wait for that first */
2659 break;
2660
2661 default:
2662 assert_not_reached("Uh, main process died at wrong time.");
2663 }
2664 }
2665
2666 } else if (s->control_pid == pid) {
2667
2668 s->control_pid = 0;
2669
2670 if (s->control_command) {
2671 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2672
2673 if (s->control_command->ignore)
2674 success = true;
2675 }
2676
2677 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2678 "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2679 s->failure = s->failure || !success;
2680
2681 if (s->control_command &&
2682 s->control_command->command_next &&
2683 success) {
2684
2685 /* There is another command to *
2686 * execute, so let's do that. */
2687
2688 log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2689 service_run_next_control(s, success);
2690
2691 } else {
2692 /* No further commands for this step, so let's
2693 * figure out what to do next */
2694
2695 s->control_command = NULL;
2696 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2697
2698 log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2699
2700 switch (s->state) {
2701
2702 case SERVICE_START_PRE:
2703 if (success)
2704 service_enter_start(s);
2705 else
2706 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2707 break;
2708
2709 case SERVICE_START:
2710 assert(s->type == SERVICE_FORKING);
2711
2712 /* Let's try to load the pid
2713 * file here if we can. We
2714 * ignore the return value,
2715 * since the PID file might
2716 * actually be created by a
2717 * START_POST script */
2718
2719 if (success) {
2720 service_load_pid_file(s);
2721 service_search_main_pid(s);
2722
2723 service_enter_start_post(s);
2724 } else
2725 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2726
2727 break;
2728
2729 case SERVICE_START_POST:
2730 if (success) {
2731 service_load_pid_file(s);
2732 service_search_main_pid(s);
2733 }
2734
2735 s->reload_failure = !success;
2736 service_enter_running(s, true);
2737 break;
2738
2739 case SERVICE_RELOAD:
2740 if (success) {
2741 service_load_pid_file(s);
2742 service_search_main_pid(s);
2743 }
2744
2745 s->reload_failure = !success;
2746 service_enter_running(s, true);
2747 break;
2748
2749 case SERVICE_STOP:
2750 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2751 break;
2752
2753 case SERVICE_STOP_SIGTERM:
2754 case SERVICE_STOP_SIGKILL:
2755 if (main_pid_good(s) <= 0)
2756 service_enter_stop_post(s, success);
2757
2758 /* If there is still a service
2759 * process around, wait until
2760 * that one quit, too */
2761 break;
2762
2763 case SERVICE_STOP_POST:
2764 case SERVICE_FINAL_SIGTERM:
2765 case SERVICE_FINAL_SIGKILL:
2766 service_enter_dead(s, success, true);
2767 break;
2768
2769 default:
2770 assert_not_reached("Uh, control process died at wrong time.");
2771 }
2772 }
2773 }
2774
2775 /* Notify clients about changed exit status */
2776 unit_add_to_dbus_queue(u);
2777 }
2778
2779 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2780 Service *s = SERVICE(u);
2781
2782 assert(s);
2783 assert(elapsed == 1);
2784
2785 assert(w == &s->timer_watch);
2786
2787 switch (s->state) {
2788
2789 case SERVICE_START_PRE:
2790 case SERVICE_START:
2791 log_warning("%s operation timed out. Terminating.", u->meta.id);
2792 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2793 break;
2794
2795 case SERVICE_START_POST:
2796 log_warning("%s operation timed out. Stopping.", u->meta.id);
2797 service_enter_stop(s, false);
2798 break;
2799
2800 case SERVICE_RELOAD:
2801 log_warning("%s operation timed out. Stopping.", u->meta.id);
2802 s->reload_failure = true;
2803 service_enter_running(s, true);
2804 break;
2805
2806 case SERVICE_STOP:
2807 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2808 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2809 break;
2810
2811 case SERVICE_STOP_SIGTERM:
2812 if (s->exec_context.send_sigkill) {
2813 log_warning("%s stopping timed out. Killing.", u->meta.id);
2814 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2815 } else {
2816 log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2817 service_enter_stop_post(s, false);
2818 }
2819
2820 break;
2821
2822 case SERVICE_STOP_SIGKILL:
2823 /* Uh, we sent a SIGKILL and it is still not gone?
2824 * Must be something we cannot kill, so let's just be
2825 * weirded out and continue */
2826
2827 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2828 service_enter_stop_post(s, false);
2829 break;
2830
2831 case SERVICE_STOP_POST:
2832 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2833 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2834 break;
2835
2836 case SERVICE_FINAL_SIGTERM:
2837 if (s->exec_context.send_sigkill) {
2838 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2839 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2840 } else {
2841 log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2842 service_enter_dead(s, false, true);
2843 }
2844
2845 break;
2846
2847 case SERVICE_FINAL_SIGKILL:
2848 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2849 service_enter_dead(s, false, true);
2850 break;
2851
2852 case SERVICE_AUTO_RESTART:
2853 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2854 service_enter_restart(s);
2855 break;
2856
2857 default:
2858 assert_not_reached("Timeout at wrong time.");
2859 }
2860 }
2861
2862 static void service_cgroup_notify_event(Unit *u) {
2863 Service *s = SERVICE(u);
2864
2865 assert(u);
2866
2867 log_debug("%s: cgroup is empty", u->meta.id);
2868
2869 switch (s->state) {
2870
2871 /* Waiting for SIGCHLD is usually more interesting,
2872 * because it includes return codes/signals. Which is
2873 * why we ignore the cgroup events for most cases,
2874 * except when we don't know pid which to expect the
2875 * SIGCHLD for. */
2876
2877 case SERVICE_RUNNING:
2878 service_enter_running(s, true);
2879 break;
2880
2881 case SERVICE_STOP_SIGTERM:
2882 case SERVICE_STOP_SIGKILL:
2883
2884 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2885 service_enter_stop_post(s, true);
2886
2887 break;
2888
2889 case SERVICE_FINAL_SIGTERM:
2890 case SERVICE_FINAL_SIGKILL:
2891 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2892 service_enter_dead(s, true, true);
2893
2894 break;
2895
2896 default:
2897 ;
2898 }
2899 }
2900
2901 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2902 Service *s = SERVICE(u);
2903 const char *e;
2904
2905 assert(u);
2906
2907 if (s->notify_access == NOTIFY_NONE) {
2908 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2909 u->meta.id, (unsigned long) pid);
2910 return;
2911 }
2912
2913 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2914 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2915 u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2916 return;
2917 }
2918
2919 log_debug("%s: Got message", u->meta.id);
2920
2921 /* Interpret MAINPID= */
2922 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2923 (s->state == SERVICE_START ||
2924 s->state == SERVICE_START_POST ||
2925 s->state == SERVICE_RUNNING ||
2926 s->state == SERVICE_RELOAD)) {
2927
2928 if (parse_pid(e + 8, &pid) < 0)
2929 log_warning("Failed to parse notification message %s", e);
2930 else {
2931 log_debug("%s: got %s", u->meta.id, e);
2932 service_set_main_pid(s, pid);
2933 }
2934 }
2935
2936 /* Interpret READY= */
2937 if (s->type == SERVICE_NOTIFY &&
2938 s->state == SERVICE_START &&
2939 strv_find(tags, "READY=1")) {
2940 log_debug("%s: got READY=1", u->meta.id);
2941
2942 service_enter_start_post(s);
2943 }
2944
2945 /* Interpret STATUS= */
2946 if ((e = strv_find_prefix(tags, "STATUS="))) {
2947 char *t;
2948
2949 if (e[7]) {
2950 if (!(t = strdup(e+7))) {
2951 log_error("Failed to allocate string.");
2952 return;
2953 }
2954
2955 log_debug("%s: got %s", u->meta.id, e);
2956
2957 free(s->status_text);
2958 s->status_text = t;
2959 } else {
2960 free(s->status_text);
2961 s->status_text = NULL;
2962 }
2963
2964 }
2965
2966 /* Notify clients about changed status or main pid */
2967 unit_add_to_dbus_queue(u);
2968 }
2969
2970 #ifdef HAVE_SYSV_COMPAT
2971
2972 #ifdef TARGET_SUSE
2973 static void sysv_facility_in_insserv_conf(Manager *mgr) {
2974 FILE *f=NULL;
2975 int r;
2976
2977 if (!(f = fopen("/etc/insserv.conf", "re"))) {
2978 r = errno == ENOENT ? 0 : -errno;
2979 goto finish;
2980 }
2981
2982 while (!feof(f)) {
2983 char l[LINE_MAX], *t;
2984 char **parsed = NULL;
2985
2986 if (!fgets(l, sizeof(l), f)) {
2987 if (feof(f))
2988 break;
2989
2990 r = -errno;
2991 log_error("Failed to read configuration file '/etc/insserv.conf': %s", strerror(-r));
2992 goto finish;
2993 }
2994
2995 t = strstrip(l);
2996 if (*t != '$' && *t != '<')
2997 continue;
2998
2999 parsed = strv_split(t,WHITESPACE);
3000 /* we ignore <interactive>, not used, equivalent to X-Interactive */
3001 if (parsed && !startswith_no_case (parsed[0], "<interactive>")) {
3002 char *facility;
3003 Unit *u;
3004 if (sysv_translate_facility(parsed[0], NULL, &facility) < 0)
3005 continue;
3006 if ((u = manager_get_unit(mgr, facility)) && (u->meta.type == UNIT_TARGET)) {
3007 UnitDependency e;
3008 char *dep = NULL, *name, **j;
3009
3010 STRV_FOREACH (j, parsed+1) {
3011 if (*j[0]=='+') {
3012 e = UNIT_WANTS;
3013 name = *j+1;
3014 }
3015 else {
3016 e = UNIT_REQUIRES;
3017 name = *j;
3018 }
3019 if (sysv_translate_facility(name, NULL, &dep) < 0)
3020 continue;
3021
3022 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, e, dep, NULL, true);
3023 free(dep);
3024 }
3025 }
3026 free(facility);
3027 }
3028 strv_free(parsed);
3029 }
3030 finish:
3031 if (f)
3032 fclose(f);
3033
3034 }
3035 #endif
3036
3037 static int service_enumerate(Manager *m) {
3038 char **p;
3039 unsigned i;
3040 DIR *d = NULL;
3041 char *path = NULL, *fpath = NULL, *name = NULL;
3042 Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
3043 Unit *service;
3044 Iterator j;
3045 int r;
3046
3047 assert(m);
3048
3049 if (m->running_as != MANAGER_SYSTEM)
3050 return 0;
3051
3052 zero(runlevel_services);
3053
3054 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3055 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3056 struct dirent *de;
3057
3058 free(path);
3059 path = join(*p, "/", rcnd_table[i].path, NULL);
3060 if (!path) {
3061 r = -ENOMEM;
3062 goto finish;
3063 }
3064
3065 if (d)
3066 closedir(d);
3067
3068 if (!(d = opendir(path))) {
3069 if (errno != ENOENT)
3070 log_warning("opendir() failed on %s: %s", path, strerror(errno));
3071
3072 continue;
3073 }
3074
3075 while ((de = readdir(d))) {
3076 int a, b;
3077
3078 if (ignore_file(de->d_name))
3079 continue;
3080
3081 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3082 continue;
3083
3084 if (strlen(de->d_name) < 4)
3085 continue;
3086
3087 a = undecchar(de->d_name[1]);
3088 b = undecchar(de->d_name[2]);
3089
3090 if (a < 0 || b < 0)
3091 continue;
3092
3093 free(fpath);
3094 fpath = join(path, "/", de->d_name, NULL);
3095 if (!path) {
3096 r = -ENOMEM;
3097 goto finish;
3098 }
3099
3100 if (access(fpath, X_OK) < 0) {
3101
3102 if (errno != ENOENT)
3103 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3104
3105 continue;
3106 }
3107
3108 free(name);
3109 if (!(name = sysv_translate_name(de->d_name + 3))) {
3110 r = -ENOMEM;
3111 goto finish;
3112 }
3113
3114 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
3115 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3116 continue;
3117 }
3118
3119 if (de->d_name[0] == 'S') {
3120
3121 if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
3122 SERVICE(service)->sysv_start_priority_from_rcnd =
3123 MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3124
3125 SERVICE(service)->sysv_enabled = true;
3126 }
3127
3128 if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3129 goto finish;
3130
3131 if ((r = set_put(runlevel_services[i], service)) < 0)
3132 goto finish;
3133
3134 } else if (de->d_name[0] == 'K' &&
3135 (rcnd_table[i].type == RUNLEVEL_DOWN ||
3136 rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3137
3138 if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3139 goto finish;
3140
3141 if ((r = set_put(shutdown_services, service)) < 0)
3142 goto finish;
3143 }
3144 }
3145 }
3146
3147 /* Now we loaded all stubs and are aware of the lowest
3148 start-up priority for all services, not let's actually load
3149 the services, this will also tell us which services are
3150 actually native now */
3151 manager_dispatch_load_queue(m);
3152
3153 /* If this is a native service, rely on native ways to pull in
3154 * a service, don't pull it in via sysv rcN.d links. */
3155 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3156 SET_FOREACH(service, runlevel_services[i], j) {
3157 service = unit_follow_merge(service);
3158
3159 if (service->meta.fragment_path)
3160 continue;
3161
3162 if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3163 goto finish;
3164 }
3165
3166 /* We honour K links only for halt/reboot. For the normal
3167 * runlevels we assume the stop jobs will be implicitly added
3168 * by the core logic. Also, we don't really distinguish here
3169 * between the runlevels 0 and 6 and just add them to the
3170 * special shutdown target. On SUSE the boot.d/ runlevel is
3171 * also used for shutdown, so we add links for that too to the
3172 * shutdown target.*/
3173 SET_FOREACH(service, shutdown_services, j) {
3174 service = unit_follow_merge(service);
3175
3176 if (service->meta.fragment_path)
3177 continue;
3178
3179 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3180 goto finish;
3181 }
3182
3183 r = 0;
3184
3185 #ifdef TARGET_SUSE
3186 sysv_facility_in_insserv_conf (m);
3187 #endif
3188
3189 finish:
3190 free(path);
3191 free(fpath);
3192 free(name);
3193
3194 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3195 set_free(runlevel_services[i]);
3196 set_free(shutdown_services);
3197
3198 if (d)
3199 closedir(d);
3200
3201 return r;
3202 }
3203 #endif
3204
3205 static void service_bus_name_owner_change(
3206 Unit *u,
3207 const char *name,
3208 const char *old_owner,
3209 const char *new_owner) {
3210
3211 Service *s = SERVICE(u);
3212
3213 assert(s);
3214 assert(name);
3215
3216 assert(streq(s->bus_name, name));
3217 assert(old_owner || new_owner);
3218
3219 if (old_owner && new_owner)
3220 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3221 else if (old_owner)
3222 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3223 else
3224 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3225
3226 s->bus_name_good = !!new_owner;
3227
3228 if (s->type == SERVICE_DBUS) {
3229
3230 /* service_enter_running() will figure out what to
3231 * do */
3232 if (s->state == SERVICE_RUNNING)
3233 service_enter_running(s, true);
3234 else if (s->state == SERVICE_START && new_owner)
3235 service_enter_start_post(s);
3236
3237 } else if (new_owner &&
3238 s->main_pid <= 0 &&
3239 (s->state == SERVICE_START ||
3240 s->state == SERVICE_START_POST ||
3241 s->state == SERVICE_RUNNING ||
3242 s->state == SERVICE_RELOAD)) {
3243
3244 /* Try to acquire PID from bus service */
3245 log_debug("Trying to acquire PID from D-Bus name...");
3246
3247 bus_query_pid(u->meta.manager, name);
3248 }
3249 }
3250
3251 static void service_bus_query_pid_done(
3252 Unit *u,
3253 const char *name,
3254 pid_t pid) {
3255
3256 Service *s = SERVICE(u);
3257
3258 assert(s);
3259 assert(name);
3260
3261 log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3262
3263 if (s->main_pid <= 0 &&
3264 (s->state == SERVICE_START ||
3265 s->state == SERVICE_START_POST ||
3266 s->state == SERVICE_RUNNING ||
3267 s->state == SERVICE_RELOAD))
3268 service_set_main_pid(s, pid);
3269 }
3270
3271 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3272 assert(s);
3273 assert(fd >= 0);
3274
3275 /* This is called by the socket code when instantiating a new
3276 * service for a stream socket and the socket needs to be
3277 * configured. */
3278
3279 if (s->meta.load_state != UNIT_LOADED)
3280 return -EINVAL;
3281
3282 if (s->socket_fd >= 0)
3283 return -EBUSY;
3284
3285 if (s->state != SERVICE_DEAD)
3286 return -EAGAIN;
3287
3288 s->socket_fd = fd;
3289 s->got_socket_fd = true;
3290 s->accept_socket = sock;
3291
3292 return 0;
3293 }
3294
3295 static void service_reset_failed(Unit *u) {
3296 Service *s = SERVICE(u);
3297
3298 assert(s);
3299
3300 if (s->state == SERVICE_FAILED)
3301 service_set_state(s, SERVICE_DEAD);
3302
3303 s->failure = false;
3304 }
3305
3306 static bool service_need_daemon_reload(Unit *u) {
3307 Service *s = SERVICE(u);
3308
3309 assert(s);
3310
3311 #ifdef HAVE_SYSV_COMPAT
3312 if (s->sysv_path) {
3313 struct stat st;
3314
3315 zero(st);
3316 if (stat(s->sysv_path, &st) < 0)
3317 /* What, cannot access this anymore? */
3318 return true;
3319
3320 if (s->sysv_mtime > 0 &&
3321 timespec_load(&st.st_mtim) != s->sysv_mtime)
3322 return true;
3323 }
3324 #endif
3325
3326 return false;
3327 }
3328
3329 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3330 Service *s = SERVICE(u);
3331 int r = 0;
3332 Set *pid_set = NULL;
3333
3334 assert(s);
3335
3336 if (s->main_pid <= 0 && who == KILL_MAIN) {
3337 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3338 return -ESRCH;
3339 }
3340
3341 if (s->control_pid <= 0 && who == KILL_CONTROL) {
3342 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3343 return -ESRCH;
3344 }
3345
3346 if (who == KILL_CONTROL || who == KILL_ALL)
3347 if (s->control_pid > 0)
3348 if (kill(s->control_pid, signo) < 0)
3349 r = -errno;
3350
3351 if (who == KILL_MAIN || who == KILL_ALL)
3352 if (s->main_pid > 0)
3353 if (kill(s->main_pid, signo) < 0)
3354 r = -errno;
3355
3356 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
3357 int q;
3358
3359 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3360 return -ENOMEM;
3361
3362 /* Exclude the control/main pid from being killed via the cgroup */
3363 if (s->control_pid > 0)
3364 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3365 r = q;
3366 goto finish;
3367 }
3368
3369 if (s->main_pid > 0)
3370 if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3371 r = q;
3372 goto finish;
3373 }
3374
3375 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, false, pid_set)) < 0)
3376 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
3377 r = q;
3378 }
3379
3380 finish:
3381 if (pid_set)
3382 set_free(pid_set);
3383
3384 return r;
3385 }
3386
3387 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3388 [SERVICE_DEAD] = "dead",
3389 [SERVICE_START_PRE] = "start-pre",
3390 [SERVICE_START] = "start",
3391 [SERVICE_START_POST] = "start-post",
3392 [SERVICE_RUNNING] = "running",
3393 [SERVICE_EXITED] = "exited",
3394 [SERVICE_RELOAD] = "reload",
3395 [SERVICE_STOP] = "stop",
3396 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3397 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3398 [SERVICE_STOP_POST] = "stop-post",
3399 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3400 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3401 [SERVICE_FAILED] = "failed",
3402 [SERVICE_AUTO_RESTART] = "auto-restart",
3403 };
3404
3405 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3406
3407 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3408 [SERVICE_RESTART_NO] = "no",
3409 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3410 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3411 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3412 [SERVICE_RESTART_ALWAYS] = "always"
3413 };
3414
3415 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3416
3417 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3418 [SERVICE_SIMPLE] = "simple",
3419 [SERVICE_FORKING] = "forking",
3420 [SERVICE_ONESHOT] = "oneshot",
3421 [SERVICE_DBUS] = "dbus",
3422 [SERVICE_NOTIFY] = "notify"
3423 };
3424
3425 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3426
3427 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3428 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3429 [SERVICE_EXEC_START] = "ExecStart",
3430 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3431 [SERVICE_EXEC_RELOAD] = "ExecReload",
3432 [SERVICE_EXEC_STOP] = "ExecStop",
3433 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3434 };
3435
3436 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3437
3438 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3439 [NOTIFY_NONE] = "none",
3440 [NOTIFY_MAIN] = "main",
3441 [NOTIFY_ALL] = "all"
3442 };
3443
3444 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3445
3446 const UnitVTable service_vtable = {
3447 .suffix = ".service",
3448 .sections =
3449 "Unit\0"
3450 "Service\0"
3451 "Install\0",
3452 .show_status = true,
3453
3454 .init = service_init,
3455 .done = service_done,
3456 .load = service_load,
3457
3458 .coldplug = service_coldplug,
3459
3460 .dump = service_dump,
3461
3462 .start = service_start,
3463 .stop = service_stop,
3464 .reload = service_reload,
3465
3466 .can_reload = service_can_reload,
3467
3468 .kill = service_kill,
3469
3470 .serialize = service_serialize,
3471 .deserialize_item = service_deserialize_item,
3472
3473 .active_state = service_active_state,
3474 .sub_state_to_string = service_sub_state_to_string,
3475
3476 .check_gc = service_check_gc,
3477 .check_snapshot = service_check_snapshot,
3478
3479 .sigchld_event = service_sigchld_event,
3480 .timer_event = service_timer_event,
3481
3482 .reset_failed = service_reset_failed,
3483
3484 .need_daemon_reload = service_need_daemon_reload,
3485
3486 .cgroup_notify_empty = service_cgroup_notify_event,
3487 .notify_message = service_notify_message,
3488
3489 .bus_name_owner_change = service_bus_name_owner_change,
3490 .bus_query_pid_done = service_bus_query_pid_done,
3491
3492 .bus_interface = "org.freedesktop.systemd1.Service",
3493 .bus_message_handler = bus_service_message_handler,
3494 .bus_invalidating_properties = bus_service_invalidating_properties,
3495
3496 #ifdef HAVE_SYSV_COMPAT
3497 .enumerate = service_enumerate
3498 #endif
3499 };
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