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