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service: handle services with racy daemonization gracefully
[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_info("PID file %s not readable (yet?) after %s.",
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_info("PID %lu read from file %s does not exist.",
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 } else
1332 log_debug("Main PID loaded: %lu", (unsigned long) pid);
1333
1334 if ((r = service_set_main_pid(s, pid)) < 0)
1335 return r;
1336
1337 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1338 /* FIXME: we need to do something here */
1339 return r;
1340
1341 return 0;
1342 }
1343
1344 static int service_search_main_pid(Service *s) {
1345 pid_t pid;
1346 int r;
1347
1348 assert(s);
1349
1350 /* If we know it anyway, don't ever fallback to unreliable
1351 * heuristics */
1352 if (s->main_pid_known)
1353 return 0;
1354
1355 if (!s->guess_main_pid)
1356 return 0;
1357
1358 assert(s->main_pid <= 0);
1359
1360 if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1361 return -ENOENT;
1362
1363 log_debug("Main PID guessed: %lu", (unsigned long) pid);
1364 if ((r = service_set_main_pid(s, pid)) < 0)
1365 return r;
1366
1367 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1368 /* FIXME: we need to do something here */
1369 return r;
1370
1371 return 0;
1372 }
1373
1374 static int service_get_sockets(Service *s, Set **_set) {
1375 Set *set;
1376 Iterator i;
1377 char *t;
1378 int r;
1379
1380 assert(s);
1381 assert(_set);
1382
1383 if (s->socket_fd >= 0)
1384 return 0;
1385
1386 if (!set_isempty(s->configured_sockets))
1387 return 0;
1388
1389 /* Collects all Socket objects that belong to this
1390 * service. Note that a service might have multiple sockets
1391 * via multiple names. */
1392
1393 if (!(set = set_new(NULL, NULL)))
1394 return -ENOMEM;
1395
1396 SET_FOREACH(t, s->meta.names, i) {
1397 char *k;
1398 Unit *p;
1399
1400 /* Look for all socket objects that go by any of our
1401 * units and collect their fds */
1402
1403 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1404 r = -ENOMEM;
1405 goto fail;
1406 }
1407
1408 p = manager_get_unit(s->meta.manager, k);
1409 free(k);
1410
1411 if (!p)
1412 continue;
1413
1414 if ((r = set_put(set, p)) < 0)
1415 goto fail;
1416 }
1417
1418 *_set = set;
1419 return 0;
1420
1421 fail:
1422 set_free(set);
1423 return r;
1424 }
1425
1426 static int service_notify_sockets_dead(Service *s) {
1427 Iterator i;
1428 Set *set, *free_set = NULL;
1429 Socket *sock;
1430 int r;
1431
1432 assert(s);
1433
1434 /* Notifies all our sockets when we die */
1435
1436 if (s->socket_fd >= 0)
1437 return 0;
1438
1439 if (!set_isempty(s->configured_sockets))
1440 set = s->configured_sockets;
1441 else {
1442 if ((r = service_get_sockets(s, &free_set)) < 0)
1443 return r;
1444
1445 set = free_set;
1446 }
1447
1448 SET_FOREACH(sock, set, i)
1449 socket_notify_service_dead(sock);
1450
1451 set_free(free_set);
1452
1453 return 0;
1454 }
1455
1456 static void service_unwatch_pid_file(Service *s) {
1457 if (!s->pid_file_pathspec)
1458 return;
1459
1460 log_debug("Stopping watch for %s's PID file %s", s->meta.id, s->pid_file_pathspec->path);
1461 pathspec_unwatch(s->pid_file_pathspec, UNIT(s));
1462 pathspec_done(s->pid_file_pathspec);
1463 free(s->pid_file_pathspec);
1464 s->pid_file_pathspec = NULL;
1465 }
1466
1467 static void service_set_state(Service *s, ServiceState state) {
1468 ServiceState old_state;
1469 assert(s);
1470
1471 old_state = s->state;
1472 s->state = state;
1473
1474 service_unwatch_pid_file(s);
1475
1476 if (state != SERVICE_START_PRE &&
1477 state != SERVICE_START &&
1478 state != SERVICE_START_POST &&
1479 state != SERVICE_RELOAD &&
1480 state != SERVICE_STOP &&
1481 state != SERVICE_STOP_SIGTERM &&
1482 state != SERVICE_STOP_SIGKILL &&
1483 state != SERVICE_STOP_POST &&
1484 state != SERVICE_FINAL_SIGTERM &&
1485 state != SERVICE_FINAL_SIGKILL &&
1486 state != SERVICE_AUTO_RESTART)
1487 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1488
1489 if (state != SERVICE_START &&
1490 state != SERVICE_START_POST &&
1491 state != SERVICE_RUNNING &&
1492 state != SERVICE_RELOAD &&
1493 state != SERVICE_STOP &&
1494 state != SERVICE_STOP_SIGTERM &&
1495 state != SERVICE_STOP_SIGKILL) {
1496 service_unwatch_main_pid(s);
1497 s->main_command = NULL;
1498 }
1499
1500 if (state != SERVICE_START_PRE &&
1501 state != SERVICE_START &&
1502 state != SERVICE_START_POST &&
1503 state != SERVICE_RELOAD &&
1504 state != SERVICE_STOP &&
1505 state != SERVICE_STOP_SIGTERM &&
1506 state != SERVICE_STOP_SIGKILL &&
1507 state != SERVICE_STOP_POST &&
1508 state != SERVICE_FINAL_SIGTERM &&
1509 state != SERVICE_FINAL_SIGKILL) {
1510 service_unwatch_control_pid(s);
1511 s->control_command = NULL;
1512 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1513 }
1514
1515 if (state == SERVICE_DEAD ||
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_FAILED ||
1523 state == SERVICE_AUTO_RESTART)
1524 service_notify_sockets_dead(s);
1525
1526 if (state != SERVICE_START_PRE &&
1527 state != SERVICE_START &&
1528 state != SERVICE_START_POST &&
1529 state != SERVICE_RUNNING &&
1530 state != SERVICE_RELOAD &&
1531 state != SERVICE_STOP &&
1532 state != SERVICE_STOP_SIGTERM &&
1533 state != SERVICE_STOP_SIGKILL &&
1534 state != SERVICE_STOP_POST &&
1535 state != SERVICE_FINAL_SIGTERM &&
1536 state != SERVICE_FINAL_SIGKILL &&
1537 !(state == SERVICE_DEAD && s->meta.job)) {
1538 service_close_socket_fd(s);
1539 service_connection_unref(s);
1540 }
1541
1542 /* For the inactive states unit_notify() will trim the cgroup,
1543 * but for exit we have to do that ourselves... */
1544 if (state == SERVICE_EXITED && s->meta.manager->n_reloading <= 0)
1545 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1546
1547 if (old_state != state)
1548 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1549
1550 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1551 s->reload_failure = false;
1552 }
1553
1554 static int service_coldplug(Unit *u) {
1555 Service *s = SERVICE(u);
1556 int r;
1557
1558 assert(s);
1559 assert(s->state == SERVICE_DEAD);
1560
1561 if (s->deserialized_state != s->state) {
1562
1563 if (s->deserialized_state == SERVICE_START_PRE ||
1564 s->deserialized_state == SERVICE_START ||
1565 s->deserialized_state == SERVICE_START_POST ||
1566 s->deserialized_state == SERVICE_RELOAD ||
1567 s->deserialized_state == SERVICE_STOP ||
1568 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1569 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1570 s->deserialized_state == SERVICE_STOP_POST ||
1571 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1572 s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1573 s->deserialized_state == SERVICE_AUTO_RESTART) {
1574
1575 if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1576 usec_t k;
1577
1578 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1579
1580 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1581 return r;
1582 }
1583 }
1584
1585 if ((s->deserialized_state == SERVICE_START &&
1586 (s->type == SERVICE_FORKING ||
1587 s->type == SERVICE_DBUS ||
1588 s->type == SERVICE_ONESHOT ||
1589 s->type == SERVICE_NOTIFY)) ||
1590 s->deserialized_state == SERVICE_START_POST ||
1591 s->deserialized_state == SERVICE_RUNNING ||
1592 s->deserialized_state == SERVICE_RELOAD ||
1593 s->deserialized_state == SERVICE_STOP ||
1594 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1595 s->deserialized_state == SERVICE_STOP_SIGKILL)
1596 if (s->main_pid > 0)
1597 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1598 return r;
1599
1600 if (s->deserialized_state == SERVICE_START_PRE ||
1601 s->deserialized_state == SERVICE_START ||
1602 s->deserialized_state == SERVICE_START_POST ||
1603 s->deserialized_state == SERVICE_RELOAD ||
1604 s->deserialized_state == SERVICE_STOP ||
1605 s->deserialized_state == SERVICE_STOP_SIGTERM ||
1606 s->deserialized_state == SERVICE_STOP_SIGKILL ||
1607 s->deserialized_state == SERVICE_STOP_POST ||
1608 s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1609 s->deserialized_state == SERVICE_FINAL_SIGKILL)
1610 if (s->control_pid > 0)
1611 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1612 return r;
1613
1614 service_set_state(s, s->deserialized_state);
1615 }
1616
1617 return 0;
1618 }
1619
1620 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1621 Iterator i;
1622 int r;
1623 int *rfds = NULL;
1624 unsigned rn_fds = 0;
1625 Set *set, *free_set = NULL;
1626 Socket *sock;
1627
1628 assert(s);
1629 assert(fds);
1630 assert(n_fds);
1631
1632 if (s->socket_fd >= 0)
1633 return 0;
1634
1635 if (!set_isempty(s->configured_sockets))
1636 set = s->configured_sockets;
1637 else {
1638 if ((r = service_get_sockets(s, &free_set)) < 0)
1639 return r;
1640
1641 set = free_set;
1642 }
1643
1644 SET_FOREACH(sock, set, i) {
1645 int *cfds;
1646 unsigned cn_fds;
1647
1648 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1649 goto fail;
1650
1651 if (!cfds)
1652 continue;
1653
1654 if (!rfds) {
1655 rfds = cfds;
1656 rn_fds = cn_fds;
1657 } else {
1658 int *t;
1659
1660 if (!(t = new(int, rn_fds+cn_fds))) {
1661 free(cfds);
1662 r = -ENOMEM;
1663 goto fail;
1664 }
1665
1666 memcpy(t, rfds, rn_fds * sizeof(int));
1667 memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1668 free(rfds);
1669 free(cfds);
1670
1671 rfds = t;
1672 rn_fds = rn_fds+cn_fds;
1673 }
1674 }
1675
1676 *fds = rfds;
1677 *n_fds = rn_fds;
1678
1679 set_free(free_set);
1680
1681 return 0;
1682
1683 fail:
1684 set_free(set);
1685 free(rfds);
1686
1687 return r;
1688 }
1689
1690 static int service_spawn(
1691 Service *s,
1692 ExecCommand *c,
1693 bool timeout,
1694 bool pass_fds,
1695 bool apply_permissions,
1696 bool apply_chroot,
1697 bool apply_tty_stdin,
1698 bool set_notify_socket,
1699 pid_t *_pid) {
1700
1701 pid_t pid;
1702 int r;
1703 int *fds = NULL, *fdsbuf = NULL;
1704 unsigned n_fds = 0, n_env = 0;
1705 char **argv = NULL, **final_env = NULL, **our_env = NULL;
1706
1707 assert(s);
1708 assert(c);
1709 assert(_pid);
1710
1711 if (pass_fds ||
1712 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1713 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1714 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1715
1716 if (s->socket_fd >= 0) {
1717 fds = &s->socket_fd;
1718 n_fds = 1;
1719 } else {
1720 if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1721 goto fail;
1722
1723 fds = fdsbuf;
1724 }
1725 }
1726
1727 if (timeout && s->timeout_usec) {
1728 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1729 goto fail;
1730 } else
1731 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1732
1733 if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1734 r = -ENOMEM;
1735 goto fail;
1736 }
1737
1738 if (!(our_env = new0(char*, 4))) {
1739 r = -ENOMEM;
1740 goto fail;
1741 }
1742
1743 if (set_notify_socket)
1744 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", s->meta.manager->notify_socket) < 0) {
1745 r = -ENOMEM;
1746 goto fail;
1747 }
1748
1749 if (s->main_pid > 0)
1750 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1751 r = -ENOMEM;
1752 goto fail;
1753 }
1754
1755 if (!(final_env = strv_env_merge(2,
1756 s->meta.manager->environment,
1757 our_env,
1758 NULL))) {
1759 r = -ENOMEM;
1760 goto fail;
1761 }
1762
1763 r = exec_spawn(c,
1764 argv,
1765 &s->exec_context,
1766 fds, n_fds,
1767 final_env,
1768 apply_permissions,
1769 apply_chroot,
1770 apply_tty_stdin,
1771 s->meta.manager->confirm_spawn,
1772 s->meta.cgroup_bondings,
1773 s->meta.cgroup_attributes,
1774 &pid);
1775
1776 if (r < 0)
1777 goto fail;
1778
1779
1780 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1781 /* FIXME: we need to do something here */
1782 goto fail;
1783
1784 free(fdsbuf);
1785 strv_free(argv);
1786 strv_free(our_env);
1787 strv_free(final_env);
1788
1789 *_pid = pid;
1790
1791 return 0;
1792
1793 fail:
1794 free(fdsbuf);
1795 strv_free(argv);
1796 strv_free(our_env);
1797 strv_free(final_env);
1798
1799 if (timeout)
1800 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1801
1802 return r;
1803 }
1804
1805 static int main_pid_good(Service *s) {
1806 assert(s);
1807
1808 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1809 * don't know */
1810
1811 /* If we know the pid file, then lets just check if it is
1812 * still valid */
1813 if (s->main_pid_known) {
1814
1815 /* If it's an alien child let's check if it is still
1816 * alive ... */
1817 if (s->main_pid_alien)
1818 return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1819
1820 /* .. otherwise assume we'll get a SIGCHLD for it,
1821 * which we really should wait for to collect exit
1822 * status and code */
1823 return s->main_pid > 0;
1824 }
1825
1826 /* We don't know the pid */
1827 return -EAGAIN;
1828 }
1829
1830 static int control_pid_good(Service *s) {
1831 assert(s);
1832
1833 return s->control_pid > 0;
1834 }
1835
1836 static int cgroup_good(Service *s) {
1837 int r;
1838
1839 assert(s);
1840
1841 if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1842 return r;
1843
1844 return !r;
1845 }
1846
1847 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1848 int r;
1849 assert(s);
1850
1851 if (!success)
1852 s->failure = true;
1853
1854 if (allow_restart &&
1855 !s->forbid_restart &&
1856 (s->restart == SERVICE_RESTART_ALWAYS ||
1857 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1858 (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1859 (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1860 (s->main_exec_status.code == CLD_KILLED ||
1861 s->main_exec_status.code == CLD_DUMPED)))) {
1862
1863 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1864 goto fail;
1865
1866 service_set_state(s, SERVICE_AUTO_RESTART);
1867 } else
1868 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1869
1870 s->forbid_restart = false;
1871
1872 return;
1873
1874 fail:
1875 log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1876 service_enter_dead(s, false, false);
1877 }
1878
1879 static void service_enter_signal(Service *s, ServiceState state, bool success);
1880
1881 static void service_enter_stop_post(Service *s, bool success) {
1882 int r;
1883 assert(s);
1884
1885 if (!success)
1886 s->failure = true;
1887
1888 service_unwatch_control_pid(s);
1889
1890 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1891 s->control_command_id = SERVICE_EXEC_STOP_POST;
1892
1893 if ((r = service_spawn(s,
1894 s->control_command,
1895 true,
1896 false,
1897 !s->permissions_start_only,
1898 !s->root_directory_start_only,
1899 true,
1900 false,
1901 &s->control_pid)) < 0)
1902 goto fail;
1903
1904
1905 service_set_state(s, SERVICE_STOP_POST);
1906 } else
1907 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1908
1909 return;
1910
1911 fail:
1912 log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1913 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1914 }
1915
1916 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1917 int r;
1918 Set *pid_set = NULL;
1919 bool wait_for_exit = false;
1920
1921 assert(s);
1922
1923 if (!success)
1924 s->failure = true;
1925
1926 if (s->exec_context.kill_mode != KILL_NONE) {
1927 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1928
1929 if (s->main_pid > 0) {
1930 if (kill_and_sigcont(s->main_pid, sig) < 0 && errno != ESRCH)
1931 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1932 else
1933 wait_for_exit = !s->main_pid_alien;
1934 }
1935
1936 if (s->control_pid > 0) {
1937 if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1938 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1939 else
1940 wait_for_exit = true;
1941 }
1942
1943 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1944
1945 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1946 r = -ENOMEM;
1947 goto fail;
1948 }
1949
1950 /* Exclude the main/control pids from being killed via the cgroup */
1951 if (s->main_pid > 0)
1952 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1953 goto fail;
1954
1955 if (s->control_pid > 0)
1956 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1957 goto fail;
1958
1959 if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
1960 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1961 log_warning("Failed to kill control group: %s", strerror(-r));
1962 } else if (r > 0)
1963 wait_for_exit = true;
1964
1965 set_free(pid_set);
1966 pid_set = NULL;
1967 }
1968 }
1969
1970 if (wait_for_exit) {
1971 if (s->timeout_usec > 0)
1972 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1973 goto fail;
1974
1975 service_set_state(s, state);
1976 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1977 service_enter_stop_post(s, true);
1978 else
1979 service_enter_dead(s, true, true);
1980
1981 return;
1982
1983 fail:
1984 log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1985
1986 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1987 service_enter_stop_post(s, false);
1988 else
1989 service_enter_dead(s, false, true);
1990
1991 if (pid_set)
1992 set_free(pid_set);
1993 }
1994
1995 static void service_enter_stop(Service *s, bool success) {
1996 int r;
1997
1998 assert(s);
1999
2000 if (!success)
2001 s->failure = true;
2002
2003 service_unwatch_control_pid(s);
2004
2005 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
2006 s->control_command_id = SERVICE_EXEC_STOP;
2007
2008 if ((r = service_spawn(s,
2009 s->control_command,
2010 true,
2011 false,
2012 !s->permissions_start_only,
2013 !s->root_directory_start_only,
2014 false,
2015 false,
2016 &s->control_pid)) < 0)
2017 goto fail;
2018
2019 service_set_state(s, SERVICE_STOP);
2020 } else
2021 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2022
2023 return;
2024
2025 fail:
2026 log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
2027 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2028 }
2029
2030 static void service_enter_running(Service *s, bool success) {
2031 int main_pid_ok, cgroup_ok;
2032 assert(s);
2033
2034 if (!success)
2035 s->failure = true;
2036
2037 main_pid_ok = main_pid_good(s);
2038 cgroup_ok = cgroup_good(s);
2039
2040 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2041 (s->bus_name_good || s->type != SERVICE_DBUS))
2042 service_set_state(s, SERVICE_RUNNING);
2043 else if (s->remain_after_exit)
2044 service_set_state(s, SERVICE_EXITED);
2045 else
2046 service_enter_stop(s, true);
2047 }
2048
2049 static void service_enter_start_post(Service *s) {
2050 int r;
2051 assert(s);
2052
2053 service_unwatch_control_pid(s);
2054
2055 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
2056 s->control_command_id = SERVICE_EXEC_START_POST;
2057
2058 if ((r = service_spawn(s,
2059 s->control_command,
2060 true,
2061 false,
2062 !s->permissions_start_only,
2063 !s->root_directory_start_only,
2064 false,
2065 false,
2066 &s->control_pid)) < 0)
2067 goto fail;
2068
2069 service_set_state(s, SERVICE_START_POST);
2070 } else
2071 service_enter_running(s, true);
2072
2073 return;
2074
2075 fail:
2076 log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
2077 service_enter_stop(s, false);
2078 }
2079
2080 static void service_enter_start(Service *s) {
2081 pid_t pid;
2082 int r;
2083 ExecCommand *c;
2084
2085 assert(s);
2086
2087 assert(s->exec_command[SERVICE_EXEC_START]);
2088 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2089
2090 if (s->type == SERVICE_FORKING)
2091 service_unwatch_control_pid(s);
2092 else
2093 service_unwatch_main_pid(s);
2094
2095 if (s->type == SERVICE_FORKING) {
2096 s->control_command_id = SERVICE_EXEC_START;
2097 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2098
2099 s->main_command = NULL;
2100 } else {
2101 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2102 s->control_command = NULL;
2103
2104 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2105 }
2106
2107 if ((r = service_spawn(s,
2108 c,
2109 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2110 true,
2111 true,
2112 true,
2113 true,
2114 s->notify_access != NOTIFY_NONE,
2115 &pid)) < 0)
2116 goto fail;
2117
2118 if (s->type == SERVICE_SIMPLE) {
2119 /* For simple services we immediately start
2120 * the START_POST binaries. */
2121
2122 service_set_main_pid(s, pid);
2123 service_enter_start_post(s);
2124
2125 } else if (s->type == SERVICE_FORKING) {
2126
2127 /* For forking services we wait until the start
2128 * process exited. */
2129
2130 s->control_pid = pid;
2131 service_set_state(s, SERVICE_START);
2132
2133 } else if (s->type == SERVICE_ONESHOT ||
2134 s->type == SERVICE_DBUS ||
2135 s->type == SERVICE_NOTIFY) {
2136
2137 /* For oneshot services we wait until the start
2138 * process exited, too, but it is our main process. */
2139
2140 /* For D-Bus services we know the main pid right away,
2141 * but wait for the bus name to appear on the
2142 * bus. Notify services are similar. */
2143
2144 service_set_main_pid(s, pid);
2145 service_set_state(s, SERVICE_START);
2146 } else
2147 assert_not_reached("Unknown service type");
2148
2149 return;
2150
2151 fail:
2152 log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2153 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2154 }
2155
2156 static void service_enter_start_pre(Service *s) {
2157 int r;
2158
2159 assert(s);
2160
2161 service_unwatch_control_pid(s);
2162
2163 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2164 s->control_command_id = SERVICE_EXEC_START_PRE;
2165
2166 if ((r = service_spawn(s,
2167 s->control_command,
2168 true,
2169 false,
2170 !s->permissions_start_only,
2171 !s->root_directory_start_only,
2172 true,
2173 false,
2174 &s->control_pid)) < 0)
2175 goto fail;
2176
2177 service_set_state(s, SERVICE_START_PRE);
2178 } else
2179 service_enter_start(s);
2180
2181 return;
2182
2183 fail:
2184 log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2185 service_enter_dead(s, false, true);
2186 }
2187
2188 static void service_enter_restart(Service *s) {
2189 int r;
2190 DBusError error;
2191
2192 assert(s);
2193 dbus_error_init(&error);
2194
2195 if (s->meta.job) {
2196 log_info("Job pending for unit, delaying automatic restart.");
2197
2198 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2199 goto fail;
2200 }
2201
2202 service_enter_dead(s, true, false);
2203
2204 if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2205 goto fail;
2206
2207 log_debug("%s scheduled restart job.", s->meta.id);
2208 return;
2209
2210 fail:
2211 log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2212 service_enter_dead(s, false, false);
2213
2214 dbus_error_free(&error);
2215 }
2216
2217 static void service_enter_reload(Service *s) {
2218 int r;
2219
2220 assert(s);
2221
2222 service_unwatch_control_pid(s);
2223
2224 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2225 s->control_command_id = SERVICE_EXEC_RELOAD;
2226
2227 if ((r = service_spawn(s,
2228 s->control_command,
2229 true,
2230 false,
2231 !s->permissions_start_only,
2232 !s->root_directory_start_only,
2233 false,
2234 false,
2235 &s->control_pid)) < 0)
2236 goto fail;
2237
2238 service_set_state(s, SERVICE_RELOAD);
2239 } else
2240 service_enter_running(s, true);
2241
2242 return;
2243
2244 fail:
2245 log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2246 s->reload_failure = true;
2247 service_enter_running(s, true);
2248 }
2249
2250 static void service_run_next_control(Service *s, bool success) {
2251 int r;
2252
2253 assert(s);
2254 assert(s->control_command);
2255 assert(s->control_command->command_next);
2256
2257 if (!success)
2258 s->failure = true;
2259
2260 assert(s->control_command_id != SERVICE_EXEC_START);
2261
2262 s->control_command = s->control_command->command_next;
2263 service_unwatch_control_pid(s);
2264
2265 if ((r = service_spawn(s,
2266 s->control_command,
2267 true,
2268 false,
2269 !s->permissions_start_only,
2270 !s->root_directory_start_only,
2271 s->control_command_id == SERVICE_EXEC_START_PRE ||
2272 s->control_command_id == SERVICE_EXEC_STOP_POST,
2273 false,
2274 &s->control_pid)) < 0)
2275 goto fail;
2276
2277 return;
2278
2279 fail:
2280 log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2281
2282 if (s->state == SERVICE_START_PRE)
2283 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2284 else if (s->state == SERVICE_STOP)
2285 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2286 else if (s->state == SERVICE_STOP_POST)
2287 service_enter_dead(s, false, true);
2288 else if (s->state == SERVICE_RELOAD) {
2289 s->reload_failure = true;
2290 service_enter_running(s, true);
2291 } else
2292 service_enter_stop(s, false);
2293 }
2294
2295 static void service_run_next_main(Service *s, bool success) {
2296 pid_t pid;
2297 int r;
2298
2299 assert(s);
2300 assert(s->main_command);
2301 assert(s->main_command->command_next);
2302 assert(s->type == SERVICE_ONESHOT);
2303
2304 if (!success)
2305 s->failure = true;
2306
2307 s->main_command = s->main_command->command_next;
2308 service_unwatch_main_pid(s);
2309
2310 if ((r = service_spawn(s,
2311 s->main_command,
2312 false,
2313 true,
2314 true,
2315 true,
2316 true,
2317 s->notify_access != NOTIFY_NONE,
2318 &pid)) < 0)
2319 goto fail;
2320
2321 service_set_main_pid(s, pid);
2322
2323 return;
2324
2325 fail:
2326 log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2327 service_enter_stop(s, false);
2328 }
2329
2330 static int service_start(Unit *u) {
2331 Service *s = SERVICE(u);
2332
2333 assert(s);
2334
2335 /* We cannot fulfill this request right now, try again later
2336 * please! */
2337 if (s->state == SERVICE_STOP ||
2338 s->state == SERVICE_STOP_SIGTERM ||
2339 s->state == SERVICE_STOP_SIGKILL ||
2340 s->state == SERVICE_STOP_POST ||
2341 s->state == SERVICE_FINAL_SIGTERM ||
2342 s->state == SERVICE_FINAL_SIGKILL)
2343 return -EAGAIN;
2344
2345 /* Already on it! */
2346 if (s->state == SERVICE_START_PRE ||
2347 s->state == SERVICE_START ||
2348 s->state == SERVICE_START_POST)
2349 return 0;
2350
2351 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2352
2353 /* Make sure we don't enter a busy loop of some kind. */
2354 if (!ratelimit_test(&s->ratelimit)) {
2355 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2356 return -ECANCELED;
2357 }
2358
2359 s->failure = false;
2360 s->main_pid_known = false;
2361 s->main_pid_alien = false;
2362 s->forbid_restart = false;
2363
2364 service_enter_start_pre(s);
2365 return 0;
2366 }
2367
2368 static int service_stop(Unit *u) {
2369 Service *s = SERVICE(u);
2370
2371 assert(s);
2372
2373 /* This is a user request, so don't do restarts on this
2374 * shutdown. */
2375 s->forbid_restart = true;
2376
2377 /* Already on it */
2378 if (s->state == SERVICE_STOP ||
2379 s->state == SERVICE_STOP_SIGTERM ||
2380 s->state == SERVICE_STOP_SIGKILL ||
2381 s->state == SERVICE_STOP_POST ||
2382 s->state == SERVICE_FINAL_SIGTERM ||
2383 s->state == SERVICE_FINAL_SIGKILL)
2384 return 0;
2385
2386 /* Don't allow a restart */
2387 if (s->state == SERVICE_AUTO_RESTART) {
2388 service_set_state(s, SERVICE_DEAD);
2389 return 0;
2390 }
2391
2392 /* If there's already something running we go directly into
2393 * kill mode. */
2394 if (s->state == SERVICE_START_PRE ||
2395 s->state == SERVICE_START ||
2396 s->state == SERVICE_START_POST ||
2397 s->state == SERVICE_RELOAD) {
2398 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2399 return 0;
2400 }
2401
2402 assert(s->state == SERVICE_RUNNING ||
2403 s->state == SERVICE_EXITED);
2404
2405 service_enter_stop(s, true);
2406 return 0;
2407 }
2408
2409 static int service_reload(Unit *u) {
2410 Service *s = SERVICE(u);
2411
2412 assert(s);
2413
2414 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2415
2416 service_enter_reload(s);
2417 return 0;
2418 }
2419
2420 static bool service_can_reload(Unit *u) {
2421 Service *s = SERVICE(u);
2422
2423 assert(s);
2424
2425 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2426 }
2427
2428 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2429 Service *s = SERVICE(u);
2430
2431 assert(u);
2432 assert(f);
2433 assert(fds);
2434
2435 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2436 unit_serialize_item(u, f, "failure", yes_no(s->failure));
2437
2438 if (s->control_pid > 0)
2439 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2440
2441 if (s->main_pid_known && s->main_pid > 0)
2442 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2443
2444 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2445
2446 if (s->status_text)
2447 unit_serialize_item(u, f, "status-text", s->status_text);
2448
2449 /* There's a minor uncleanliness here: if there are multiple
2450 * commands attached here, we will start from the first one
2451 * again */
2452 if (s->control_command_id >= 0)
2453 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2454
2455 if (s->socket_fd >= 0) {
2456 int copy;
2457
2458 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2459 return copy;
2460
2461 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2462 }
2463
2464 if (s->main_exec_status.pid > 0) {
2465 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2466 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2467 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2468
2469 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2470 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2471 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2472 }
2473 }
2474
2475 return 0;
2476 }
2477
2478 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2479 Service *s = SERVICE(u);
2480
2481 assert(u);
2482 assert(key);
2483 assert(value);
2484 assert(fds);
2485
2486 if (streq(key, "state")) {
2487 ServiceState state;
2488
2489 if ((state = service_state_from_string(value)) < 0)
2490 log_debug("Failed to parse state value %s", value);
2491 else
2492 s->deserialized_state = state;
2493 } else if (streq(key, "failure")) {
2494 int b;
2495
2496 if ((b = parse_boolean(value)) < 0)
2497 log_debug("Failed to parse failure value %s", value);
2498 else
2499 s->failure = b || s->failure;
2500 } else if (streq(key, "control-pid")) {
2501 pid_t pid;
2502
2503 if (parse_pid(value, &pid) < 0)
2504 log_debug("Failed to parse control-pid value %s", value);
2505 else
2506 s->control_pid = pid;
2507 } else if (streq(key, "main-pid")) {
2508 pid_t pid;
2509
2510 if (parse_pid(value, &pid) < 0)
2511 log_debug("Failed to parse main-pid value %s", value);
2512 else
2513 service_set_main_pid(s, (pid_t) pid);
2514 } else if (streq(key, "main-pid-known")) {
2515 int b;
2516
2517 if ((b = parse_boolean(value)) < 0)
2518 log_debug("Failed to parse main-pid-known value %s", value);
2519 else
2520 s->main_pid_known = b;
2521 } else if (streq(key, "status-text")) {
2522 char *t;
2523
2524 if ((t = strdup(value))) {
2525 free(s->status_text);
2526 s->status_text = t;
2527 }
2528
2529 } else if (streq(key, "control-command")) {
2530 ServiceExecCommand id;
2531
2532 if ((id = service_exec_command_from_string(value)) < 0)
2533 log_debug("Failed to parse exec-command value %s", value);
2534 else {
2535 s->control_command_id = id;
2536 s->control_command = s->exec_command[id];
2537 }
2538 } else if (streq(key, "socket-fd")) {
2539 int fd;
2540
2541 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2542 log_debug("Failed to parse socket-fd value %s", value);
2543 else {
2544
2545 if (s->socket_fd >= 0)
2546 close_nointr_nofail(s->socket_fd);
2547 s->socket_fd = fdset_remove(fds, fd);
2548 }
2549 } else if (streq(key, "main-exec-status-pid")) {
2550 pid_t pid;
2551
2552 if (parse_pid(value, &pid) < 0)
2553 log_debug("Failed to parse main-exec-status-pid value %s", value);
2554 else
2555 s->main_exec_status.pid = pid;
2556 } else if (streq(key, "main-exec-status-code")) {
2557 int i;
2558
2559 if (safe_atoi(value, &i) < 0)
2560 log_debug("Failed to parse main-exec-status-code value %s", value);
2561 else
2562 s->main_exec_status.code = i;
2563 } else if (streq(key, "main-exec-status-status")) {
2564 int i;
2565
2566 if (safe_atoi(value, &i) < 0)
2567 log_debug("Failed to parse main-exec-status-status value %s", value);
2568 else
2569 s->main_exec_status.status = i;
2570 } else if (streq(key, "main-exec-status-start"))
2571 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2572 else if (streq(key, "main-exec-status-exit"))
2573 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2574 else
2575 log_debug("Unknown serialization key '%s'", key);
2576
2577 return 0;
2578 }
2579
2580 static UnitActiveState service_active_state(Unit *u) {
2581 assert(u);
2582
2583 return state_translation_table[SERVICE(u)->state];
2584 }
2585
2586 static const char *service_sub_state_to_string(Unit *u) {
2587 assert(u);
2588
2589 return service_state_to_string(SERVICE(u)->state);
2590 }
2591
2592 static bool service_check_gc(Unit *u) {
2593 Service *s = SERVICE(u);
2594
2595 assert(s);
2596
2597 /* Never clean up services that still have a process around,
2598 * even if the service is formally dead. */
2599 if (cgroup_good(s) > 0 ||
2600 main_pid_good(s) > 0 ||
2601 control_pid_good(s) > 0)
2602 return true;
2603
2604 #ifdef HAVE_SYSV_COMPAT
2605 if (s->sysv_path)
2606 return true;
2607 #endif
2608
2609 return false;
2610 }
2611
2612 static bool service_check_snapshot(Unit *u) {
2613 Service *s = SERVICE(u);
2614
2615 assert(s);
2616
2617 return !s->got_socket_fd;
2618 }
2619
2620 static int service_retry_pid_file(Service *s) {
2621 int r;
2622
2623 assert(s->pid_file);
2624 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2625
2626 r = service_load_pid_file(s, false);
2627 if (r < 0)
2628 return r;
2629
2630 service_unwatch_pid_file(s);
2631
2632 service_enter_running(s, true);
2633 return 0;
2634 }
2635
2636 static int service_watch_pid_file(Service *s) {
2637 int r;
2638
2639 log_debug("Setting watch for %s's PID file %s", s->meta.id, s->pid_file_pathspec->path);
2640 r = pathspec_watch(s->pid_file_pathspec, UNIT(s));
2641 if (r < 0)
2642 goto fail;
2643
2644 /* the pidfile might have appeared just before we set the watch */
2645 service_retry_pid_file(s);
2646
2647 return 0;
2648 fail:
2649 log_error("Failed to set a watch for %s's PID file %s: %s",
2650 s->meta.id, s->pid_file_pathspec->path, strerror(-r));
2651 service_unwatch_pid_file(s);
2652 return r;
2653 }
2654
2655 static int service_demand_pid_file(Service *s) {
2656 PathSpec *ps;
2657
2658 assert(s->pid_file);
2659 assert(!s->pid_file_pathspec);
2660
2661 ps = new0(PathSpec, 1);
2662 if (!ps)
2663 return -ENOMEM;
2664
2665 ps->path = strdup(s->pid_file);
2666 if (!ps->path) {
2667 free(ps);
2668 return -ENOMEM;
2669 }
2670
2671 path_kill_slashes(ps->path);
2672
2673 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2674 * keep their PID file open all the time. */
2675 ps->type = PATH_MODIFIED;
2676 ps->inotify_fd = -1;
2677
2678 s->pid_file_pathspec = ps;
2679
2680 return service_watch_pid_file(s);
2681 }
2682
2683 static void service_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
2684 Service *s = SERVICE(u);
2685
2686 assert(s);
2687 assert(fd >= 0);
2688 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2689 assert(s->pid_file_pathspec);
2690 assert(pathspec_owns_inotify_fd(s->pid_file_pathspec, fd));
2691
2692 log_debug("inotify event for %s", u->meta.id);
2693
2694 if (pathspec_fd_event(s->pid_file_pathspec, events) < 0)
2695 goto fail;
2696
2697 if (service_retry_pid_file(s) == 0)
2698 return;
2699
2700 if (service_watch_pid_file(s) < 0)
2701 goto fail;
2702
2703 return;
2704 fail:
2705 service_unwatch_pid_file(s);
2706 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2707 }
2708
2709 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2710 Service *s = SERVICE(u);
2711 bool success;
2712
2713 assert(s);
2714 assert(pid >= 0);
2715
2716 if (!s->meta.fragment_path)
2717 success = is_clean_exit_lsb(code, status);
2718 else
2719 success = is_clean_exit(code, status);
2720
2721 if (s->main_pid == pid) {
2722 /* Forking services may occasionally move to a new PID.
2723 * As long as they update the PID file before exiting the old
2724 * PID, they're fine. */
2725 if (service_load_pid_file(s, false) == 0)
2726 return;
2727
2728 s->main_pid = 0;
2729 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2730
2731 /* If this is not a forking service than the main
2732 * process got started and hence we copy the exit
2733 * status so that it is recorded both as main and as
2734 * control process exit status */
2735 if (s->main_command) {
2736 s->main_command->exec_status = s->main_exec_status;
2737
2738 if (s->main_command->ignore)
2739 success = true;
2740 }
2741
2742 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2743 "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2744 s->failure = s->failure || !success;
2745
2746 if (s->main_command &&
2747 s->main_command->command_next &&
2748 success) {
2749
2750 /* There is another command to *
2751 * execute, so let's do that. */
2752
2753 log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2754 service_run_next_main(s, success);
2755
2756 } else {
2757
2758 /* The service exited, so the service is officially
2759 * gone. */
2760 s->main_command = NULL;
2761
2762 switch (s->state) {
2763
2764 case SERVICE_START_POST:
2765 case SERVICE_RELOAD:
2766 case SERVICE_STOP:
2767 /* Need to wait until the operation is
2768 * done */
2769 break;
2770
2771 case SERVICE_START:
2772 if (s->type == SERVICE_ONESHOT) {
2773 /* This was our main goal, so let's go on */
2774 if (success)
2775 service_enter_start_post(s);
2776 else
2777 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2778 break;
2779 } else {
2780 assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2781
2782 /* Fall through */
2783 }
2784
2785 case SERVICE_RUNNING:
2786 service_enter_running(s, success);
2787 break;
2788
2789 case SERVICE_STOP_SIGTERM:
2790 case SERVICE_STOP_SIGKILL:
2791
2792 if (!control_pid_good(s))
2793 service_enter_stop_post(s, success);
2794
2795 /* If there is still a control process, wait for that first */
2796 break;
2797
2798 default:
2799 assert_not_reached("Uh, main process died at wrong time.");
2800 }
2801 }
2802
2803 } else if (s->control_pid == pid) {
2804
2805 s->control_pid = 0;
2806
2807 if (s->control_command) {
2808 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2809
2810 if (s->control_command->ignore)
2811 success = true;
2812 }
2813
2814 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2815 "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2816 s->failure = s->failure || !success;
2817
2818 if (s->control_command &&
2819 s->control_command->command_next &&
2820 success) {
2821
2822 /* There is another command to *
2823 * execute, so let's do that. */
2824
2825 log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2826 service_run_next_control(s, success);
2827
2828 } else {
2829 /* No further commands for this step, so let's
2830 * figure out what to do next */
2831
2832 s->control_command = NULL;
2833 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2834
2835 log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2836
2837 switch (s->state) {
2838
2839 case SERVICE_START_PRE:
2840 if (success)
2841 service_enter_start(s);
2842 else
2843 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2844 break;
2845
2846 case SERVICE_START:
2847 assert(s->type == SERVICE_FORKING);
2848
2849 if (!success) {
2850 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2851 break;
2852 }
2853
2854 if (s->pid_file) {
2855 /* Let's try to load the pid file here if we can.
2856 * The PID file might actually be created by a START_POST
2857 * script. In that case don't worry if the loading fails. */
2858 bool has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
2859 int r = service_load_pid_file(s, !has_start_post);
2860 if (!has_start_post && r < 0) {
2861 r = service_demand_pid_file(s);
2862 if (r < 0 || !cgroup_good(s))
2863 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2864 break;
2865 }
2866 } else
2867 service_search_main_pid(s);
2868
2869 service_enter_start_post(s);
2870 break;
2871
2872 case SERVICE_START_POST:
2873 if (success) {
2874 if (s->pid_file) {
2875 int r = service_load_pid_file(s, true);
2876 if (r < 0) {
2877 r = service_demand_pid_file(s);
2878 if (r < 0 || !cgroup_good(s))
2879 service_enter_stop(s, false);
2880 break;
2881 }
2882 } else
2883 service_search_main_pid(s);
2884 }
2885
2886 s->reload_failure = !success;
2887 service_enter_running(s, true);
2888 break;
2889
2890 case SERVICE_RELOAD:
2891 if (success) {
2892 service_load_pid_file(s, true);
2893 service_search_main_pid(s);
2894 }
2895
2896 s->reload_failure = !success;
2897 service_enter_running(s, true);
2898 break;
2899
2900 case SERVICE_STOP:
2901 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2902 break;
2903
2904 case SERVICE_STOP_SIGTERM:
2905 case SERVICE_STOP_SIGKILL:
2906 if (main_pid_good(s) <= 0)
2907 service_enter_stop_post(s, success);
2908
2909 /* If there is still a service
2910 * process around, wait until
2911 * that one quit, too */
2912 break;
2913
2914 case SERVICE_STOP_POST:
2915 case SERVICE_FINAL_SIGTERM:
2916 case SERVICE_FINAL_SIGKILL:
2917 service_enter_dead(s, success, true);
2918 break;
2919
2920 default:
2921 assert_not_reached("Uh, control process died at wrong time.");
2922 }
2923 }
2924 }
2925
2926 /* Notify clients about changed exit status */
2927 unit_add_to_dbus_queue(u);
2928 }
2929
2930 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2931 Service *s = SERVICE(u);
2932
2933 assert(s);
2934 assert(elapsed == 1);
2935
2936 assert(w == &s->timer_watch);
2937
2938 switch (s->state) {
2939
2940 case SERVICE_START_PRE:
2941 case SERVICE_START:
2942 log_warning("%s operation timed out. Terminating.", u->meta.id);
2943 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2944 break;
2945
2946 case SERVICE_START_POST:
2947 log_warning("%s operation timed out. Stopping.", u->meta.id);
2948 service_enter_stop(s, false);
2949 break;
2950
2951 case SERVICE_RELOAD:
2952 log_warning("%s operation timed out. Stopping.", u->meta.id);
2953 s->reload_failure = true;
2954 service_enter_running(s, true);
2955 break;
2956
2957 case SERVICE_STOP:
2958 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2959 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2960 break;
2961
2962 case SERVICE_STOP_SIGTERM:
2963 if (s->exec_context.send_sigkill) {
2964 log_warning("%s stopping timed out. Killing.", u->meta.id);
2965 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2966 } else {
2967 log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2968 service_enter_stop_post(s, false);
2969 }
2970
2971 break;
2972
2973 case SERVICE_STOP_SIGKILL:
2974 /* Uh, we sent a SIGKILL and it is still not gone?
2975 * Must be something we cannot kill, so let's just be
2976 * weirded out and continue */
2977
2978 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2979 service_enter_stop_post(s, false);
2980 break;
2981
2982 case SERVICE_STOP_POST:
2983 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2984 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2985 break;
2986
2987 case SERVICE_FINAL_SIGTERM:
2988 if (s->exec_context.send_sigkill) {
2989 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2990 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2991 } else {
2992 log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2993 service_enter_dead(s, false, true);
2994 }
2995
2996 break;
2997
2998 case SERVICE_FINAL_SIGKILL:
2999 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
3000 service_enter_dead(s, false, true);
3001 break;
3002
3003 case SERVICE_AUTO_RESTART:
3004 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
3005 service_enter_restart(s);
3006 break;
3007
3008 default:
3009 assert_not_reached("Timeout at wrong time.");
3010 }
3011 }
3012
3013 static void service_cgroup_notify_event(Unit *u) {
3014 Service *s = SERVICE(u);
3015
3016 assert(u);
3017
3018 log_debug("%s: cgroup is empty", u->meta.id);
3019
3020 switch (s->state) {
3021
3022 /* Waiting for SIGCHLD is usually more interesting,
3023 * because it includes return codes/signals. Which is
3024 * why we ignore the cgroup events for most cases,
3025 * except when we don't know pid which to expect the
3026 * SIGCHLD for. */
3027
3028 case SERVICE_START:
3029 case SERVICE_START_POST:
3030 /* If we were hoping for the daemon to write its PID file,
3031 * we can give up now. */
3032 if (s->pid_file_pathspec) {
3033 log_warning("%s never wrote its PID file. Failing.", s->meta.id);
3034 service_unwatch_pid_file(s);
3035 if (s->state == SERVICE_START)
3036 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
3037 else
3038 service_enter_stop(s, false);
3039 }
3040 break;
3041
3042 case SERVICE_RUNNING:
3043 service_enter_running(s, true);
3044 break;
3045
3046 case SERVICE_STOP_SIGTERM:
3047 case SERVICE_STOP_SIGKILL:
3048
3049 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3050 service_enter_stop_post(s, true);
3051
3052 break;
3053
3054 case SERVICE_FINAL_SIGTERM:
3055 case SERVICE_FINAL_SIGKILL:
3056 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3057 service_enter_dead(s, true, true);
3058
3059 break;
3060
3061 default:
3062 ;
3063 }
3064 }
3065
3066 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3067 Service *s = SERVICE(u);
3068 const char *e;
3069
3070 assert(u);
3071
3072 if (s->notify_access == NOTIFY_NONE) {
3073 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
3074 u->meta.id, (unsigned long) pid);
3075 return;
3076 }
3077
3078 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3079 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3080 u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
3081 return;
3082 }
3083
3084 log_debug("%s: Got message", u->meta.id);
3085
3086 /* Interpret MAINPID= */
3087 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3088 (s->state == SERVICE_START ||
3089 s->state == SERVICE_START_POST ||
3090 s->state == SERVICE_RUNNING ||
3091 s->state == SERVICE_RELOAD)) {
3092
3093 if (parse_pid(e + 8, &pid) < 0)
3094 log_warning("Failed to parse notification message %s", e);
3095 else {
3096 log_debug("%s: got %s", u->meta.id, e);
3097 service_set_main_pid(s, pid);
3098 }
3099 }
3100
3101 /* Interpret READY= */
3102 if (s->type == SERVICE_NOTIFY &&
3103 s->state == SERVICE_START &&
3104 strv_find(tags, "READY=1")) {
3105 log_debug("%s: got READY=1", u->meta.id);
3106
3107 service_enter_start_post(s);
3108 }
3109
3110 /* Interpret STATUS= */
3111 if ((e = strv_find_prefix(tags, "STATUS="))) {
3112 char *t;
3113
3114 if (e[7]) {
3115 if (!(t = strdup(e+7))) {
3116 log_error("Failed to allocate string.");
3117 return;
3118 }
3119
3120 log_debug("%s: got %s", u->meta.id, e);
3121
3122 free(s->status_text);
3123 s->status_text = t;
3124 } else {
3125 free(s->status_text);
3126 s->status_text = NULL;
3127 }
3128
3129 }
3130
3131 /* Notify clients about changed status or main pid */
3132 unit_add_to_dbus_queue(u);
3133 }
3134
3135 #ifdef HAVE_SYSV_COMPAT
3136
3137 #ifdef TARGET_SUSE
3138 static void sysv_facility_in_insserv_conf(Manager *mgr) {
3139 FILE *f=NULL;
3140 int r;
3141
3142 if (!(f = fopen("/etc/insserv.conf", "re"))) {
3143 r = errno == ENOENT ? 0 : -errno;
3144 goto finish;
3145 }
3146
3147 while (!feof(f)) {
3148 char l[LINE_MAX], *t;
3149 char **parsed = NULL;
3150
3151 if (!fgets(l, sizeof(l), f)) {
3152 if (feof(f))
3153 break;
3154
3155 r = -errno;
3156 log_error("Failed to read configuration file '/etc/insserv.conf': %s", strerror(-r));
3157 goto finish;
3158 }
3159
3160 t = strstrip(l);
3161 if (*t != '$' && *t != '<')
3162 continue;
3163
3164 parsed = strv_split(t,WHITESPACE);
3165 /* we ignore <interactive>, not used, equivalent to X-Interactive */
3166 if (parsed && !startswith_no_case (parsed[0], "<interactive>")) {
3167 char *facility;
3168 Unit *u;
3169 if (sysv_translate_facility(parsed[0], NULL, &facility) < 0)
3170 continue;
3171 if ((u = manager_get_unit(mgr, facility)) && (u->meta.type == UNIT_TARGET)) {
3172 UnitDependency e;
3173 char *dep = NULL, *name, **j;
3174
3175 STRV_FOREACH (j, parsed+1) {
3176 if (*j[0]=='+') {
3177 e = UNIT_WANTS;
3178 name = *j+1;
3179 }
3180 else {
3181 e = UNIT_REQUIRES;
3182 name = *j;
3183 }
3184 if (sysv_translate_facility(name, NULL, &dep) < 0)
3185 continue;
3186
3187 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, e, dep, NULL, true);
3188 free(dep);
3189 }
3190 }
3191 free(facility);
3192 }
3193 strv_free(parsed);
3194 }
3195 finish:
3196 if (f)
3197 fclose(f);
3198
3199 }
3200 #endif
3201
3202 static int service_enumerate(Manager *m) {
3203 char **p;
3204 unsigned i;
3205 DIR *d = NULL;
3206 char *path = NULL, *fpath = NULL, *name = NULL;
3207 Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
3208 Unit *service;
3209 Iterator j;
3210 int r;
3211
3212 assert(m);
3213
3214 if (m->running_as != MANAGER_SYSTEM)
3215 return 0;
3216
3217 zero(runlevel_services);
3218
3219 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3220 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3221 struct dirent *de;
3222
3223 free(path);
3224 path = join(*p, "/", rcnd_table[i].path, NULL);
3225 if (!path) {
3226 r = -ENOMEM;
3227 goto finish;
3228 }
3229
3230 if (d)
3231 closedir(d);
3232
3233 if (!(d = opendir(path))) {
3234 if (errno != ENOENT)
3235 log_warning("opendir() failed on %s: %s", path, strerror(errno));
3236
3237 continue;
3238 }
3239
3240 while ((de = readdir(d))) {
3241 int a, b;
3242
3243 if (ignore_file(de->d_name))
3244 continue;
3245
3246 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3247 continue;
3248
3249 if (strlen(de->d_name) < 4)
3250 continue;
3251
3252 a = undecchar(de->d_name[1]);
3253 b = undecchar(de->d_name[2]);
3254
3255 if (a < 0 || b < 0)
3256 continue;
3257
3258 free(fpath);
3259 fpath = join(path, "/", de->d_name, NULL);
3260 if (!fpath) {
3261 r = -ENOMEM;
3262 goto finish;
3263 }
3264
3265 if (access(fpath, X_OK) < 0) {
3266
3267 if (errno != ENOENT)
3268 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3269
3270 continue;
3271 }
3272
3273 free(name);
3274 if (!(name = sysv_translate_name(de->d_name + 3))) {
3275 r = -ENOMEM;
3276 goto finish;
3277 }
3278
3279 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
3280 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3281 continue;
3282 }
3283
3284 if (de->d_name[0] == 'S') {
3285
3286 if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
3287 SERVICE(service)->sysv_start_priority_from_rcnd =
3288 MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3289
3290 SERVICE(service)->sysv_enabled = true;
3291 }
3292
3293 if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3294 goto finish;
3295
3296 if ((r = set_put(runlevel_services[i], service)) < 0)
3297 goto finish;
3298
3299 } else if (de->d_name[0] == 'K' &&
3300 (rcnd_table[i].type == RUNLEVEL_DOWN ||
3301 rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3302
3303 if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3304 goto finish;
3305
3306 if ((r = set_put(shutdown_services, service)) < 0)
3307 goto finish;
3308 }
3309 }
3310 }
3311
3312 /* Now we loaded all stubs and are aware of the lowest
3313 start-up priority for all services, not let's actually load
3314 the services, this will also tell us which services are
3315 actually native now */
3316 manager_dispatch_load_queue(m);
3317
3318 /* If this is a native service, rely on native ways to pull in
3319 * a service, don't pull it in via sysv rcN.d links. */
3320 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3321 SET_FOREACH(service, runlevel_services[i], j) {
3322 service = unit_follow_merge(service);
3323
3324 if (service->meta.fragment_path)
3325 continue;
3326
3327 if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3328 goto finish;
3329 }
3330
3331 /* We honour K links only for halt/reboot. For the normal
3332 * runlevels we assume the stop jobs will be implicitly added
3333 * by the core logic. Also, we don't really distinguish here
3334 * between the runlevels 0 and 6 and just add them to the
3335 * special shutdown target. On SUSE the boot.d/ runlevel is
3336 * also used for shutdown, so we add links for that too to the
3337 * shutdown target.*/
3338 SET_FOREACH(service, shutdown_services, j) {
3339 service = unit_follow_merge(service);
3340
3341 if (service->meta.fragment_path)
3342 continue;
3343
3344 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3345 goto finish;
3346 }
3347
3348 r = 0;
3349
3350 #ifdef TARGET_SUSE
3351 sysv_facility_in_insserv_conf (m);
3352 #endif
3353
3354 finish:
3355 free(path);
3356 free(fpath);
3357 free(name);
3358
3359 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3360 set_free(runlevel_services[i]);
3361 set_free(shutdown_services);
3362
3363 if (d)
3364 closedir(d);
3365
3366 return r;
3367 }
3368 #endif
3369
3370 static void service_bus_name_owner_change(
3371 Unit *u,
3372 const char *name,
3373 const char *old_owner,
3374 const char *new_owner) {
3375
3376 Service *s = SERVICE(u);
3377
3378 assert(s);
3379 assert(name);
3380
3381 assert(streq(s->bus_name, name));
3382 assert(old_owner || new_owner);
3383
3384 if (old_owner && new_owner)
3385 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3386 else if (old_owner)
3387 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3388 else
3389 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3390
3391 s->bus_name_good = !!new_owner;
3392
3393 if (s->type == SERVICE_DBUS) {
3394
3395 /* service_enter_running() will figure out what to
3396 * do */
3397 if (s->state == SERVICE_RUNNING)
3398 service_enter_running(s, true);
3399 else if (s->state == SERVICE_START && new_owner)
3400 service_enter_start_post(s);
3401
3402 } else if (new_owner &&
3403 s->main_pid <= 0 &&
3404 (s->state == SERVICE_START ||
3405 s->state == SERVICE_START_POST ||
3406 s->state == SERVICE_RUNNING ||
3407 s->state == SERVICE_RELOAD)) {
3408
3409 /* Try to acquire PID from bus service */
3410 log_debug("Trying to acquire PID from D-Bus name...");
3411
3412 bus_query_pid(u->meta.manager, name);
3413 }
3414 }
3415
3416 static void service_bus_query_pid_done(
3417 Unit *u,
3418 const char *name,
3419 pid_t pid) {
3420
3421 Service *s = SERVICE(u);
3422
3423 assert(s);
3424 assert(name);
3425
3426 log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3427
3428 if (s->main_pid <= 0 &&
3429 (s->state == SERVICE_START ||
3430 s->state == SERVICE_START_POST ||
3431 s->state == SERVICE_RUNNING ||
3432 s->state == SERVICE_RELOAD))
3433 service_set_main_pid(s, pid);
3434 }
3435
3436 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3437 assert(s);
3438 assert(fd >= 0);
3439
3440 /* This is called by the socket code when instantiating a new
3441 * service for a stream socket and the socket needs to be
3442 * configured. */
3443
3444 if (s->meta.load_state != UNIT_LOADED)
3445 return -EINVAL;
3446
3447 if (s->socket_fd >= 0)
3448 return -EBUSY;
3449
3450 if (s->state != SERVICE_DEAD)
3451 return -EAGAIN;
3452
3453 s->socket_fd = fd;
3454 s->got_socket_fd = true;
3455 s->accept_socket = sock;
3456
3457 return 0;
3458 }
3459
3460 static void service_reset_failed(Unit *u) {
3461 Service *s = SERVICE(u);
3462
3463 assert(s);
3464
3465 if (s->state == SERVICE_FAILED)
3466 service_set_state(s, SERVICE_DEAD);
3467
3468 s->failure = false;
3469 }
3470
3471 static bool service_need_daemon_reload(Unit *u) {
3472 Service *s = SERVICE(u);
3473
3474 assert(s);
3475
3476 #ifdef HAVE_SYSV_COMPAT
3477 if (s->sysv_path) {
3478 struct stat st;
3479
3480 zero(st);
3481 if (stat(s->sysv_path, &st) < 0)
3482 /* What, cannot access this anymore? */
3483 return true;
3484
3485 if (s->sysv_mtime > 0 &&
3486 timespec_load(&st.st_mtim) != s->sysv_mtime)
3487 return true;
3488 }
3489 #endif
3490
3491 return false;
3492 }
3493
3494 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3495 Service *s = SERVICE(u);
3496 int r = 0;
3497 Set *pid_set = NULL;
3498
3499 assert(s);
3500
3501 if (s->main_pid <= 0 && who == KILL_MAIN) {
3502 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3503 return -ESRCH;
3504 }
3505
3506 if (s->control_pid <= 0 && who == KILL_CONTROL) {
3507 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3508 return -ESRCH;
3509 }
3510
3511 if (who == KILL_CONTROL || who == KILL_ALL)
3512 if (s->control_pid > 0)
3513 if (kill(s->control_pid, signo) < 0)
3514 r = -errno;
3515
3516 if (who == KILL_MAIN || who == KILL_ALL)
3517 if (s->main_pid > 0)
3518 if (kill(s->main_pid, signo) < 0)
3519 r = -errno;
3520
3521 if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
3522 int q;
3523
3524 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3525 return -ENOMEM;
3526
3527 /* Exclude the control/main pid from being killed via the cgroup */
3528 if (s->control_pid > 0)
3529 if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3530 r = q;
3531 goto finish;
3532 }
3533
3534 if (s->main_pid > 0)
3535 if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3536 r = q;
3537 goto finish;
3538 }
3539
3540 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, false, pid_set)) < 0)
3541 if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
3542 r = q;
3543 }
3544
3545 finish:
3546 if (pid_set)
3547 set_free(pid_set);
3548
3549 return r;
3550 }
3551
3552 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3553 [SERVICE_DEAD] = "dead",
3554 [SERVICE_START_PRE] = "start-pre",
3555 [SERVICE_START] = "start",
3556 [SERVICE_START_POST] = "start-post",
3557 [SERVICE_RUNNING] = "running",
3558 [SERVICE_EXITED] = "exited",
3559 [SERVICE_RELOAD] = "reload",
3560 [SERVICE_STOP] = "stop",
3561 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3562 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3563 [SERVICE_STOP_POST] = "stop-post",
3564 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3565 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3566 [SERVICE_FAILED] = "failed",
3567 [SERVICE_AUTO_RESTART] = "auto-restart",
3568 };
3569
3570 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3571
3572 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3573 [SERVICE_RESTART_NO] = "no",
3574 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3575 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3576 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3577 [SERVICE_RESTART_ALWAYS] = "always"
3578 };
3579
3580 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3581
3582 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3583 [SERVICE_SIMPLE] = "simple",
3584 [SERVICE_FORKING] = "forking",
3585 [SERVICE_ONESHOT] = "oneshot",
3586 [SERVICE_DBUS] = "dbus",
3587 [SERVICE_NOTIFY] = "notify"
3588 };
3589
3590 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3591
3592 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3593 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3594 [SERVICE_EXEC_START] = "ExecStart",
3595 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3596 [SERVICE_EXEC_RELOAD] = "ExecReload",
3597 [SERVICE_EXEC_STOP] = "ExecStop",
3598 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3599 };
3600
3601 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3602
3603 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3604 [NOTIFY_NONE] = "none",
3605 [NOTIFY_MAIN] = "main",
3606 [NOTIFY_ALL] = "all"
3607 };
3608
3609 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3610
3611 const UnitVTable service_vtable = {
3612 .suffix = ".service",
3613 .sections =
3614 "Unit\0"
3615 "Service\0"
3616 "Install\0",
3617 .show_status = true,
3618
3619 .init = service_init,
3620 .done = service_done,
3621 .load = service_load,
3622
3623 .coldplug = service_coldplug,
3624
3625 .dump = service_dump,
3626
3627 .start = service_start,
3628 .stop = service_stop,
3629 .reload = service_reload,
3630
3631 .can_reload = service_can_reload,
3632
3633 .kill = service_kill,
3634
3635 .serialize = service_serialize,
3636 .deserialize_item = service_deserialize_item,
3637
3638 .active_state = service_active_state,
3639 .sub_state_to_string = service_sub_state_to_string,
3640
3641 .check_gc = service_check_gc,
3642 .check_snapshot = service_check_snapshot,
3643
3644 .sigchld_event = service_sigchld_event,
3645 .timer_event = service_timer_event,
3646 .fd_event = service_fd_event,
3647
3648 .reset_failed = service_reset_failed,
3649
3650 .need_daemon_reload = service_need_daemon_reload,
3651
3652 .cgroup_notify_empty = service_cgroup_notify_event,
3653 .notify_message = service_notify_message,
3654
3655 .bus_name_owner_change = service_bus_name_owner_change,
3656 .bus_query_pid_done = service_bus_query_pid_done,
3657
3658 .bus_interface = "org.freedesktop.systemd1.Service",
3659 .bus_message_handler = bus_service_message_handler,
3660 .bus_invalidating_properties = bus_service_invalidating_properties,
3661
3662 #ifdef HAVE_SYSV_COMPAT
3663 .enumerate = service_enumerate
3664 #endif
3665 };
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