chiark / gitweb /
service: don't print a warning if we are in autorestart state, and can't start a...
[elogind.git] / src / core / 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 Lesser General Public License as published by
10   the Free Software Foundation; either version 2.1 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   Lesser General Public License for more details.
17
18   You should have received a copy of the GNU Lesser 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 #include <sys/reboot.h>
27
28 #include "manager.h"
29 #include "unit.h"
30 #include "service.h"
31 #include "load-fragment.h"
32 #include "load-dropin.h"
33 #include "log.h"
34 #include "strv.h"
35 #include "unit-name.h"
36 #include "dbus-service.h"
37 #include "special.h"
38 #include "bus-errors.h"
39 #include "exit-status.h"
40 #include "def.h"
41 #include "path-util.h"
42 #include "util.h"
43 #include "utf8.h"
44
45 #ifdef HAVE_SYSV_COMPAT
46
47 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
48
49 typedef enum RunlevelType {
50         RUNLEVEL_UP,
51         RUNLEVEL_DOWN,
52         RUNLEVEL_SYSINIT
53 } RunlevelType;
54
55 static const struct {
56         const char *path;
57         const char *target;
58         const RunlevelType type;
59 } rcnd_table[] = {
60         /* Standard SysV runlevels for start-up */
61         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
62         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
63         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
64         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
65         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
66
67 #ifdef TARGET_SUSE
68         /* SUSE style boot.d */
69         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
70 #endif
71
72 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
73         /* Debian style rcS.d */
74         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
75 #endif
76
77         /* Standard SysV runlevels for shutdown */
78         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
79         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
80
81         /* Note that the order here matters, as we read the
82            directories in this order, and we want to make sure that
83            sysv_start_priority is known when we first load the
84            unit. And that value we only know from S links. Hence
85            UP/SYSINIT must be read before DOWN */
86 };
87
88 #define RUNLEVELS_UP "12345"
89 /* #define RUNLEVELS_DOWN "06" */
90 #define RUNLEVELS_BOOT "bBsS"
91 #endif
92
93 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
94         [SERVICE_DEAD] = UNIT_INACTIVE,
95         [SERVICE_START_PRE] = UNIT_ACTIVATING,
96         [SERVICE_START] = UNIT_ACTIVATING,
97         [SERVICE_START_POST] = UNIT_ACTIVATING,
98         [SERVICE_RUNNING] = UNIT_ACTIVE,
99         [SERVICE_EXITED] = UNIT_ACTIVE,
100         [SERVICE_RELOAD] = UNIT_RELOADING,
101         [SERVICE_STOP] = UNIT_DEACTIVATING,
102         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
103         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
104         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
105         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
106         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
107         [SERVICE_FAILED] = UNIT_FAILED,
108         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
109 };
110
111 /* For Type=idle we never want to delay any other jobs, hence we
112  * consider idle jobs active as soon as we start working on them */
113 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
114         [SERVICE_DEAD] = UNIT_INACTIVE,
115         [SERVICE_START_PRE] = UNIT_ACTIVE,
116         [SERVICE_START] = UNIT_ACTIVE,
117         [SERVICE_START_POST] = UNIT_ACTIVE,
118         [SERVICE_RUNNING] = UNIT_ACTIVE,
119         [SERVICE_EXITED] = UNIT_ACTIVE,
120         [SERVICE_RELOAD] = UNIT_RELOADING,
121         [SERVICE_STOP] = UNIT_DEACTIVATING,
122         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
123         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
124         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
125         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
126         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
127         [SERVICE_FAILED] = UNIT_FAILED,
128         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
129 };
130
131 static void service_init(Unit *u) {
132         Service *s = SERVICE(u);
133         int i;
134
135         assert(u);
136         assert(u->load_state == UNIT_STUB);
137
138         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
139         s->restart_usec = DEFAULT_RESTART_USEC;
140         s->type = _SERVICE_TYPE_INVALID;
141
142         s->watchdog_watch.type = WATCH_INVALID;
143
144         s->timer_watch.type = WATCH_INVALID;
145 #ifdef HAVE_SYSV_COMPAT
146         s->sysv_start_priority = -1;
147         s->sysv_start_priority_from_rcnd = -1;
148 #endif
149         s->socket_fd = -1;
150         s->guess_main_pid = true;
151
152         exec_context_init(&s->exec_context);
153         for (i = 0; i < RLIMIT_NLIMITS; i++)
154                 if (UNIT(s)->manager->rlimit[i])
155                         s->exec_context.rlimit[i] = newdup(struct rlimit, UNIT(s)->manager->rlimit[i], 1);
156
157         RATELIMIT_INIT(s->start_limit, 10*USEC_PER_SEC, 5);
158
159         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
160 }
161
162 static void service_unwatch_control_pid(Service *s) {
163         assert(s);
164
165         if (s->control_pid <= 0)
166                 return;
167
168         unit_unwatch_pid(UNIT(s), s->control_pid);
169         s->control_pid = 0;
170 }
171
172 static void service_unwatch_main_pid(Service *s) {
173         assert(s);
174
175         if (s->main_pid <= 0)
176                 return;
177
178         unit_unwatch_pid(UNIT(s), s->main_pid);
179         s->main_pid = 0;
180 }
181
182 static void service_unwatch_pid_file(Service *s) {
183         if (!s->pid_file_pathspec)
184                 return;
185
186         log_debug("Stopping watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
187         path_spec_unwatch(s->pid_file_pathspec, UNIT(s));
188         path_spec_done(s->pid_file_pathspec);
189         free(s->pid_file_pathspec);
190         s->pid_file_pathspec = NULL;
191 }
192
193 static int service_set_main_pid(Service *s, pid_t pid) {
194         pid_t ppid;
195
196         assert(s);
197
198         if (pid <= 1)
199                 return -EINVAL;
200
201         if (pid == getpid())
202                 return -EINVAL;
203
204         s->main_pid = pid;
205         s->main_pid_known = true;
206
207         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
208                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
209                             UNIT(s)->id, (unsigned long) pid);
210
211                 s->main_pid_alien = true;
212         } else
213                 s->main_pid_alien = false;
214
215         exec_status_start(&s->main_exec_status, pid);
216
217         return 0;
218 }
219
220 static void service_close_socket_fd(Service *s) {
221         assert(s);
222
223         if (s->socket_fd < 0)
224                 return;
225
226         close_nointr_nofail(s->socket_fd);
227         s->socket_fd = -1;
228 }
229
230 static void service_connection_unref(Service *s) {
231         assert(s);
232
233         if (!UNIT_DEREF(s->accept_socket))
234                 return;
235
236         socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
237         unit_ref_unset(&s->accept_socket);
238 }
239
240 static void service_stop_watchdog(Service *s) {
241         assert(s);
242
243         unit_unwatch_timer(UNIT(s), &s->watchdog_watch);
244         s->watchdog_timestamp.realtime = 0;
245         s->watchdog_timestamp.monotonic = 0;
246 }
247
248 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart);
249
250 static void service_handle_watchdog(Service *s) {
251         usec_t offset;
252         int r;
253
254         assert(s);
255
256         if (s->watchdog_usec == 0)
257                 return;
258
259         offset = now(CLOCK_MONOTONIC) - s->watchdog_timestamp.monotonic;
260         if (offset >= s->watchdog_usec) {
261                 log_error("%s watchdog timeout!", UNIT(s)->id);
262                 service_enter_dead(s, SERVICE_FAILURE_WATCHDOG, true);
263                 return;
264         }
265
266         r = unit_watch_timer(UNIT(s), s->watchdog_usec - offset, &s->watchdog_watch);
267         if (r < 0)
268                 log_warning("%s failed to install watchdog timer: %s", UNIT(s)->id, strerror(-r));
269 }
270
271 static void service_reset_watchdog(Service *s) {
272         assert(s);
273
274         dual_timestamp_get(&s->watchdog_timestamp);
275         service_handle_watchdog(s);
276 }
277
278 static void service_done(Unit *u) {
279         Service *s = SERVICE(u);
280
281         assert(s);
282
283         free(s->pid_file);
284         s->pid_file = NULL;
285
286 #ifdef HAVE_SYSV_COMPAT
287         free(s->sysv_runlevels);
288         s->sysv_runlevels = NULL;
289 #endif
290
291         free(s->status_text);
292         s->status_text = NULL;
293
294         exec_context_done(&s->exec_context);
295         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
296         s->control_command = NULL;
297         s->main_command = NULL;
298
299         /* This will leak a process, but at least no memory or any of
300          * our resources */
301         service_unwatch_main_pid(s);
302         service_unwatch_control_pid(s);
303         service_unwatch_pid_file(s);
304
305         if (s->bus_name)  {
306                 unit_unwatch_bus_name(u, s->bus_name);
307                 free(s->bus_name);
308                 s->bus_name = NULL;
309         }
310
311         service_close_socket_fd(s);
312         service_connection_unref(s);
313
314         unit_ref_unset(&s->accept_socket);
315
316         service_stop_watchdog(s);
317
318         unit_unwatch_timer(u, &s->timer_watch);
319 }
320
321 #ifdef HAVE_SYSV_COMPAT
322 static char *sysv_translate_name(const char *name) {
323         char *r;
324
325         if (!(r = new(char, strlen(name) + sizeof(".service"))))
326                 return NULL;
327
328 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
329         if (endswith(name, ".sh"))
330                 /* Drop Debian-style .sh suffix */
331                 strcpy(stpcpy(r, name) - 3, ".service");
332 #endif
333 #ifdef TARGET_SUSE
334         if (startswith(name, "boot."))
335                 /* Drop SuSE-style boot. prefix */
336                 strcpy(stpcpy(r, name + 5), ".service");
337 #endif
338 #ifdef TARGET_FRUGALWARE
339         if (startswith(name, "rc."))
340                 /* Drop Frugalware-style rc. prefix */
341                 strcpy(stpcpy(r, name + 3), ".service");
342 #endif
343         else
344                 /* Normal init scripts */
345                 strcpy(stpcpy(r, name), ".service");
346
347         return r;
348 }
349
350 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
351
352         /* We silently ignore the $ prefix here. According to the LSB
353          * spec it simply indicates whether something is a
354          * standardized name or a distribution-specific one. Since we
355          * just follow what already exists and do not introduce new
356          * uses or names we don't care who introduced a new name. */
357
358         static const char * const table[] = {
359                 /* LSB defined facilities */
360                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
361 #if defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
362 #else
363                 /* Due to unfortunate name selection in Mandriva,
364                  * $network is provided by network-up which is ordered
365                  * after network which actually starts interfaces.
366                  * To break the loop, just ignore it */
367                 "network",              SPECIAL_NETWORK_TARGET,
368 #endif
369                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
370                 "portmap",              SPECIAL_RPCBIND_TARGET,
371                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
372                 "syslog",               SPECIAL_SYSLOG_TARGET,
373                 "time",                 SPECIAL_TIME_SYNC_TARGET,
374
375                 /* common extensions */
376                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
377                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
378                 "null",                 NULL,
379
380 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
381                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
382 #endif
383
384 #ifdef TARGET_FEDORA
385                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
386                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
387                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
388 #endif
389
390 #ifdef TARGET_SUSE
391                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
392 #endif
393         };
394
395         unsigned i;
396         char *r;
397         const char *n;
398
399         assert(name);
400         assert(_r);
401
402         n = *name == '$' ? name + 1 : name;
403
404         for (i = 0; i < ELEMENTSOF(table); i += 2) {
405
406                 if (!streq(table[i], n))
407                         continue;
408
409                 if (!table[i+1])
410                         return 0;
411
412                 if (!(r = strdup(table[i+1])))
413                         return -ENOMEM;
414
415                 goto finish;
416         }
417
418         /* If we don't know this name, fallback heuristics to figure
419          * out whether something is a target or a service alias. */
420
421         if (*name == '$') {
422                 if (!unit_prefix_is_valid(n))
423                         return -EINVAL;
424
425                 /* Facilities starting with $ are most likely targets */
426                 r = unit_name_build(n, NULL, ".target");
427         } else if (filename && streq(name, filename))
428                 /* Names equaling the file name of the services are redundant */
429                 return 0;
430         else
431                 /* Everything else we assume to be normal service names */
432                 r = sysv_translate_name(n);
433
434         if (!r)
435                 return -ENOMEM;
436
437 finish:
438         *_r = r;
439
440         return 1;
441 }
442
443 static int sysv_fix_order(Service *s) {
444         Unit *other;
445         int r;
446
447         assert(s);
448
449         if (s->sysv_start_priority < 0)
450                 return 0;
451
452         /* For each pair of services where at least one lacks a LSB
453          * header, we use the start priority value to order things. */
454
455         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
456                 Service *t;
457                 UnitDependency d;
458                 bool special_s, special_t;
459
460                 t = SERVICE(other);
461
462                 if (s == t)
463                         continue;
464
465                 if (UNIT(t)->load_state != UNIT_LOADED)
466                         continue;
467
468                 if (t->sysv_start_priority < 0)
469                         continue;
470
471                 /* If both units have modern headers we don't care
472                  * about the priorities */
473                 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
474                     (UNIT(t)->fragment_path || t->sysv_has_lsb))
475                         continue;
476
477                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
478                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
479
480                 if (special_t && !special_s)
481                         d = UNIT_AFTER;
482                 else if (special_s && !special_t)
483                         d = UNIT_BEFORE;
484                 else if (t->sysv_start_priority < s->sysv_start_priority)
485                         d = UNIT_AFTER;
486                 else if (t->sysv_start_priority > s->sysv_start_priority)
487                         d = UNIT_BEFORE;
488                 else
489                         continue;
490
491                 /* FIXME: Maybe we should compare the name here lexicographically? */
492
493                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
494                         return r;
495         }
496
497         return 0;
498 }
499
500 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
501         ExecCommand *c;
502
503         if (!(c = new0(ExecCommand, 1)))
504                 return NULL;
505
506         if (!(c->path = strdup(path))) {
507                 free(c);
508                 return NULL;
509         }
510
511         if (!(c->argv = strv_new(path, arg1, NULL))) {
512                 free(c->path);
513                 free(c);
514                 return NULL;
515         }
516
517         return c;
518 }
519
520 static int sysv_exec_commands(Service *s) {
521         ExecCommand *c;
522
523         assert(s);
524         assert(s->is_sysv);
525         assert(UNIT(s)->source_path);
526
527         c = exec_command_new(UNIT(s)->source_path, "start");
528         if (!c)
529                 return -ENOMEM;
530         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
531
532         c = exec_command_new(UNIT(s)->source_path, "stop");
533         if (!c)
534                 return -ENOMEM;
535         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
536
537         c = exec_command_new(UNIT(s)->source_path, "reload");
538         if (!c)
539                 return -ENOMEM;
540         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
541
542         return 0;
543 }
544
545 static int service_load_sysv_path(Service *s, const char *path) {
546         FILE *f;
547         Unit *u;
548         unsigned line = 0;
549         int r;
550         enum {
551                 NORMAL,
552                 DESCRIPTION,
553                 LSB,
554                 LSB_DESCRIPTION
555         } state = NORMAL;
556         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
557         struct stat st;
558
559         assert(s);
560         assert(path);
561
562         u = UNIT(s);
563
564         f = fopen(path, "re");
565         if (!f) {
566                 r = errno == ENOENT ? 0 : -errno;
567                 goto finish;
568         }
569
570         zero(st);
571         if (fstat(fileno(f), &st) < 0) {
572                 r = -errno;
573                 goto finish;
574         }
575
576         free(u->source_path);
577         u->source_path = strdup(path);
578         if (!u->source_path) {
579                 r = -ENOMEM;
580                 goto finish;
581         }
582         u->source_mtime = timespec_load(&st.st_mtim);
583
584         if (null_or_empty(&st)) {
585                 u->load_state = UNIT_MASKED;
586                 r = 0;
587                 goto finish;
588         }
589
590         s->is_sysv = true;
591
592         while (!feof(f)) {
593                 char l[LINE_MAX], *t;
594
595                 if (!fgets(l, sizeof(l), f)) {
596                         if (feof(f))
597                                 break;
598
599                         r = -errno;
600                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
601                         goto finish;
602                 }
603
604                 line++;
605
606                 t = strstrip(l);
607                 if (*t != '#')
608                         continue;
609
610                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
611                         state = LSB;
612                         s->sysv_has_lsb = true;
613                         continue;
614                 }
615
616                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
617                         state = NORMAL;
618                         continue;
619                 }
620
621                 t++;
622                 t += strspn(t, WHITESPACE);
623
624                 if (state == NORMAL) {
625
626                         /* Try to parse Red Hat style chkconfig headers */
627
628                         if (startswith_no_case(t, "chkconfig:")) {
629                                 int start_priority;
630                                 char runlevels[16], *k;
631
632                                 state = NORMAL;
633
634                                 if (sscanf(t+10, "%15s %i %*i",
635                                            runlevels,
636                                            &start_priority) != 2) {
637
638                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
639                                         continue;
640                                 }
641
642                                 /* A start priority gathered from the
643                                  * symlink farms is preferred over the
644                                  * data from the LSB header. */
645                                 if (start_priority < 0 || start_priority > 99)
646                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
647                                 else
648                                         s->sysv_start_priority = start_priority;
649
650                                 char_array_0(runlevels);
651                                 k = delete_chars(runlevels, WHITESPACE "-");
652
653                                 if (k[0]) {
654                                         char *d;
655
656                                         if (!(d = strdup(k))) {
657                                                 r = -ENOMEM;
658                                                 goto finish;
659                                         }
660
661                                         free(s->sysv_runlevels);
662                                         s->sysv_runlevels = d;
663                                 }
664
665                         } else if (startswith_no_case(t, "description:")) {
666
667                                 size_t k = strlen(t);
668                                 char *d;
669                                 const char *j;
670
671                                 if (t[k-1] == '\\') {
672                                         state = DESCRIPTION;
673                                         t[k-1] = 0;
674                                 }
675
676                                 if ((j = strstrip(t+12)) && *j) {
677                                         if (!(d = strdup(j))) {
678                                                 r = -ENOMEM;
679                                                 goto finish;
680                                         }
681                                 } else
682                                         d = NULL;
683
684                                 free(chkconfig_description);
685                                 chkconfig_description = d;
686
687                         } else if (startswith_no_case(t, "pidfile:")) {
688
689                                 char *fn;
690
691                                 state = NORMAL;
692
693                                 fn = strstrip(t+8);
694                                 if (!path_is_absolute(fn)) {
695                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
696                                         continue;
697                                 }
698
699                                 if (!(fn = strdup(fn))) {
700                                         r = -ENOMEM;
701                                         goto finish;
702                                 }
703
704                                 free(s->pid_file);
705                                 s->pid_file = fn;
706                         }
707
708                 } else if (state == DESCRIPTION) {
709
710                         /* Try to parse Red Hat style description
711                          * continuation */
712
713                         size_t k = strlen(t);
714                         char *j;
715
716                         if (t[k-1] == '\\')
717                                 t[k-1] = 0;
718                         else
719                                 state = NORMAL;
720
721                         if ((j = strstrip(t)) && *j) {
722                                 char *d = NULL;
723
724                                 if (chkconfig_description)
725                                         d = strjoin(chkconfig_description, " ", j, NULL);
726                                 else
727                                         d = strdup(j);
728
729                                 if (!d) {
730                                         r = -ENOMEM;
731                                         goto finish;
732                                 }
733
734                                 free(chkconfig_description);
735                                 chkconfig_description = d;
736                         }
737
738                 } else if (state == LSB || state == LSB_DESCRIPTION) {
739
740                         if (startswith_no_case(t, "Provides:")) {
741                                 char *i, *w;
742                                 size_t z;
743
744                                 state = LSB;
745
746                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
747                                         char *n, *m;
748
749                                         if (!(n = strndup(w, z))) {
750                                                 r = -ENOMEM;
751                                                 goto finish;
752                                         }
753
754                                         r = sysv_translate_facility(n, path_get_file_name(path), &m);
755                                         free(n);
756
757                                         if (r < 0)
758                                                 goto finish;
759
760                                         if (r == 0)
761                                                 continue;
762
763                                         if (unit_name_to_type(m) == UNIT_SERVICE)
764                                                 r = unit_add_name(u, m);
765                                         else
766                                                 /* NB: SysV targets
767                                                  * which are provided
768                                                  * by a service are
769                                                  * pulled in by the
770                                                  * services, as an
771                                                  * indication that the
772                                                  * generic service is
773                                                  * now available. This
774                                                  * is strictly
775                                                  * one-way. The
776                                                  * targets do NOT pull
777                                                  * in the SysV
778                                                  * services! */
779                                                 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
780
781                                         if (r < 0)
782                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
783
784                                         free(m);
785                                 }
786
787                         } else if (startswith_no_case(t, "Required-Start:") ||
788                                    startswith_no_case(t, "Should-Start:") ||
789                                    startswith_no_case(t, "X-Start-Before:") ||
790                                    startswith_no_case(t, "X-Start-After:")) {
791                                 char *i, *w;
792                                 size_t z;
793
794                                 state = LSB;
795
796                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
797                                         char *n, *m;
798
799                                         if (!(n = strndup(w, z))) {
800                                                 r = -ENOMEM;
801                                                 goto finish;
802                                         }
803
804                                         r = sysv_translate_facility(n, path_get_file_name(path), &m);
805
806                                         if (r < 0) {
807                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
808                                                 free(n);
809                                                 continue;
810                                         }
811
812                                         free(n);
813
814                                         if (r == 0)
815                                                 continue;
816
817                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
818
819                                         if (r < 0)
820                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
821
822                                         free(m);
823                                 }
824                         } else if (startswith_no_case(t, "Default-Start:")) {
825                                 char *k, *d;
826
827                                 state = LSB;
828
829                                 k = delete_chars(t+14, WHITESPACE "-");
830
831                                 if (k[0] != 0) {
832                                         if (!(d = strdup(k))) {
833                                                 r = -ENOMEM;
834                                                 goto finish;
835                                         }
836
837                                         free(s->sysv_runlevels);
838                                         s->sysv_runlevels = d;
839                                 }
840
841                         } else if (startswith_no_case(t, "Description:")) {
842                                 char *d, *j;
843
844                                 state = LSB_DESCRIPTION;
845
846                                 if ((j = strstrip(t+12)) && *j) {
847                                         if (!(d = strdup(j))) {
848                                                 r = -ENOMEM;
849                                                 goto finish;
850                                         }
851                                 } else
852                                         d = NULL;
853
854                                 free(long_description);
855                                 long_description = d;
856
857                         } else if (startswith_no_case(t, "Short-Description:")) {
858                                 char *d, *j;
859
860                                 state = LSB;
861
862                                 if ((j = strstrip(t+18)) && *j) {
863                                         if (!(d = strdup(j))) {
864                                                 r = -ENOMEM;
865                                                 goto finish;
866                                         }
867                                 } else
868                                         d = NULL;
869
870                                 free(short_description);
871                                 short_description = d;
872
873                         } else if (state == LSB_DESCRIPTION) {
874
875                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
876                                         char *j;
877
878                                         if ((j = strstrip(t)) && *j) {
879                                                 char *d = NULL;
880
881                                                 if (long_description)
882                                                         d = strjoin(long_description, " ", t, NULL);
883                                                 else
884                                                         d = strdup(j);
885
886                                                 if (!d) {
887                                                         r = -ENOMEM;
888                                                         goto finish;
889                                                 }
890
891                                                 free(long_description);
892                                                 long_description = d;
893                                         }
894
895                                 } else
896                                         state = LSB;
897                         }
898                 }
899         }
900
901         if ((r = sysv_exec_commands(s)) < 0)
902                 goto finish;
903         if (s->sysv_runlevels &&
904             chars_intersect(RUNLEVELS_BOOT, s->sysv_runlevels) &&
905             chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
906                 /* Service has both boot and "up" runlevels
907                    configured.  Kill the "up" ones. */
908                 delete_chars(s->sysv_runlevels, RUNLEVELS_UP);
909         }
910
911         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
912                 /* If there a runlevels configured for this service
913                  * but none of the standard ones, then we assume this
914                  * is some special kind of service (which might be
915                  * needed for early boot) and don't create any links
916                  * to it. */
917
918                 UNIT(s)->default_dependencies = false;
919
920                 /* Don't timeout special services during boot (like fsck) */
921                 s->timeout_usec = 0;
922         } else
923                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
924
925         /* Special setting for all SysV services */
926         s->type = SERVICE_FORKING;
927         s->remain_after_exit = !s->pid_file;
928         s->guess_main_pid = false;
929         s->restart = SERVICE_RESTART_NO;
930         s->exec_context.ignore_sigpipe = false;
931         s->exec_context.kill_mode = KILL_PROCESS;
932
933         /* We use the long description only if
934          * no short description is set. */
935
936         if (short_description)
937                 description = short_description;
938         else if (chkconfig_description)
939                 description = chkconfig_description;
940         else if (long_description)
941                 description = long_description;
942         else
943                 description = NULL;
944
945         if (description) {
946                 char *d;
947
948                 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
949                         r = -ENOMEM;
950                         goto finish;
951                 }
952
953                 u->description = d;
954         }
955
956         /* The priority that has been set in /etc/rcN.d/ hierarchies
957          * takes precedence over what is stored as default in the LSB
958          * header */
959         if (s->sysv_start_priority_from_rcnd >= 0)
960                 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
961
962         u->load_state = UNIT_LOADED;
963         r = 0;
964
965 finish:
966
967         if (f)
968                 fclose(f);
969
970         free(short_description);
971         free(long_description);
972         free(chkconfig_description);
973
974         return r;
975 }
976
977 static int service_load_sysv_name(Service *s, const char *name) {
978         char **p;
979
980         assert(s);
981         assert(name);
982
983         /* For SysV services we strip the boot.*, rc.* and *.sh
984          * prefixes/suffixes. */
985 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
986         if (endswith(name, ".sh.service"))
987                 return -ENOENT;
988 #endif
989
990 #ifdef TARGET_SUSE
991         if (startswith(name, "boot."))
992                 return -ENOENT;
993 #endif
994
995 #ifdef TARGET_FRUGALWARE
996         if (startswith(name, "rc."))
997                 return -ENOENT;
998 #endif
999
1000         STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
1001                 char *path;
1002                 int r;
1003
1004                 path = strjoin(*p, "/", name, NULL);
1005                 if (!path)
1006                         return -ENOMEM;
1007
1008                 assert(endswith(path, ".service"));
1009                 path[strlen(path)-8] = 0;
1010
1011                 r = service_load_sysv_path(s, path);
1012
1013 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
1014                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1015                         /* Try Debian style *.sh source'able init scripts */
1016                         strcat(path, ".sh");
1017                         r = service_load_sysv_path(s, path);
1018                 }
1019 #endif
1020                 free(path);
1021
1022 #ifdef TARGET_SUSE
1023                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1024                         /* Try SUSE style boot.* init scripts */
1025
1026                         path = strjoin(*p, "/boot.", name, NULL);
1027                         if (!path)
1028                                 return -ENOMEM;
1029
1030                         /* Drop .service suffix */
1031                         path[strlen(path)-8] = 0;
1032                         r = service_load_sysv_path(s, path);
1033                         free(path);
1034                 }
1035 #endif
1036
1037 #ifdef TARGET_FRUGALWARE
1038                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1039                         /* Try Frugalware style rc.* init scripts */
1040
1041                         path = strjoin(*p, "/rc.", name, NULL);
1042                         if (!path)
1043                                 return -ENOMEM;
1044
1045                         /* Drop .service suffix */
1046                         path[strlen(path)-8] = 0;
1047                         r = service_load_sysv_path(s, path);
1048                         free(path);
1049                 }
1050 #endif
1051
1052                 if (r < 0)
1053                         return r;
1054
1055                 if ((UNIT(s)->load_state != UNIT_STUB))
1056                         break;
1057         }
1058
1059         return 0;
1060 }
1061
1062 static int service_load_sysv(Service *s) {
1063         const char *t;
1064         Iterator i;
1065         int r;
1066
1067         assert(s);
1068
1069         /* Load service data from SysV init scripts, preferably with
1070          * LSB headers ... */
1071
1072         if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1073                 return 0;
1074
1075         if ((t = UNIT(s)->id))
1076                 if ((r = service_load_sysv_name(s, t)) < 0)
1077                         return r;
1078
1079         if (UNIT(s)->load_state == UNIT_STUB)
1080                 SET_FOREACH(t, UNIT(s)->names, i) {
1081                         if (t == UNIT(s)->id)
1082                                 continue;
1083
1084                         if ((r = service_load_sysv_name(s, t)) < 0)
1085                                 return r;
1086
1087                         if (UNIT(s)->load_state != UNIT_STUB)
1088                                 break;
1089                 }
1090
1091         return 0;
1092 }
1093 #endif
1094
1095 static int fsck_fix_order(Service *s) {
1096         Unit *other;
1097         int r;
1098
1099         assert(s);
1100
1101         if (s->fsck_passno <= 0)
1102                 return 0;
1103
1104         /* For each pair of services where both have an fsck priority
1105          * we order things based on it. */
1106
1107         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
1108                 Service *t;
1109                 UnitDependency d;
1110
1111                 t = SERVICE(other);
1112
1113                 if (s == t)
1114                         continue;
1115
1116                 if (UNIT(t)->load_state != UNIT_LOADED)
1117                         continue;
1118
1119                 if (t->fsck_passno <= 0)
1120                         continue;
1121
1122                 if (t->fsck_passno < s->fsck_passno)
1123                         d = UNIT_AFTER;
1124                 else if (t->fsck_passno > s->fsck_passno)
1125                         d = UNIT_BEFORE;
1126                 else
1127                         continue;
1128
1129                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1130                         return r;
1131         }
1132
1133         return 0;
1134 }
1135
1136 static int service_verify(Service *s) {
1137         assert(s);
1138
1139         if (UNIT(s)->load_state != UNIT_LOADED)
1140                 return 0;
1141
1142         if (!s->exec_command[SERVICE_EXEC_START]) {
1143                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1144                 return -EINVAL;
1145         }
1146
1147         if (s->type != SERVICE_ONESHOT &&
1148             s->exec_command[SERVICE_EXEC_START]->command_next) {
1149                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1150                 return -EINVAL;
1151         }
1152
1153         if (s->type == SERVICE_ONESHOT &&
1154             s->exec_command[SERVICE_EXEC_RELOAD]) {
1155                 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1156                 return -EINVAL;
1157         }
1158
1159         if (s->type == SERVICE_DBUS && !s->bus_name) {
1160                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1161                 return -EINVAL;
1162         }
1163
1164         if (s->bus_name && s->type != SERVICE_DBUS)
1165                 log_warning("%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
1166
1167         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1168                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
1169                 return -EINVAL;
1170         }
1171
1172         return 0;
1173 }
1174
1175 static int service_add_default_dependencies(Service *s) {
1176         int r;
1177
1178         assert(s);
1179
1180         /* Add a number of automatic dependencies useful for the
1181          * majority of services. */
1182
1183         /* First, pull in base system */
1184         if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
1185
1186                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1187                         return r;
1188
1189         } else if (UNIT(s)->manager->running_as == MANAGER_USER) {
1190
1191                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1192                         return r;
1193         }
1194
1195         /* Second, activate normal shutdown */
1196         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1197 }
1198
1199 static void service_fix_output(Service *s) {
1200         assert(s);
1201
1202         /* If nothing has been explicitly configured, patch default
1203          * output in. If input is socket/tty we avoid this however,
1204          * since in that case we want output to default to the same
1205          * place as we read input from. */
1206
1207         if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1208             s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1209             s->exec_context.std_input == EXEC_INPUT_NULL)
1210                 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1211
1212         if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1213             s->exec_context.std_input == EXEC_INPUT_NULL)
1214                 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1215 }
1216
1217 static int service_load(Unit *u) {
1218         int r;
1219         Service *s = SERVICE(u);
1220
1221         assert(s);
1222
1223         /* Load a .service file */
1224         if ((r = unit_load_fragment(u)) < 0)
1225                 return r;
1226
1227 #ifdef HAVE_SYSV_COMPAT
1228         /* Load a classic init script as a fallback, if we couldn't find anything */
1229         if (u->load_state == UNIT_STUB)
1230                 if ((r = service_load_sysv(s)) < 0)
1231                         return r;
1232 #endif
1233
1234         /* Still nothing found? Then let's give up */
1235         if (u->load_state == UNIT_STUB)
1236                 return -ENOENT;
1237
1238         /* We were able to load something, then let's add in the
1239          * dropin directories. */
1240         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1241                 return r;
1242
1243         /* This is a new unit? Then let's add in some extras */
1244         if (u->load_state == UNIT_LOADED) {
1245                 if (s->type == _SERVICE_TYPE_INVALID)
1246                         s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
1247
1248                 /* Oneshot services have disabled timeout by default */
1249                 if (s->type == SERVICE_ONESHOT && !s->timeout_defined)
1250                         s->timeout_usec = 0;
1251
1252                 service_fix_output(s);
1253
1254                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1255                         return r;
1256
1257                 if ((r = unit_add_default_cgroups(u)) < 0)
1258                         return r;
1259
1260 #ifdef HAVE_SYSV_COMPAT
1261                 if ((r = sysv_fix_order(s)) < 0)
1262                         return r;
1263 #endif
1264
1265                 if ((r = fsck_fix_order(s)) < 0)
1266                         return r;
1267
1268                 if (s->bus_name)
1269                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1270                                 return r;
1271
1272                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1273                         s->notify_access = NOTIFY_MAIN;
1274
1275                 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1276                         s->notify_access = NOTIFY_MAIN;
1277
1278                 if (s->type == SERVICE_DBUS || s->bus_name)
1279                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true)) < 0)
1280                                 return r;
1281
1282                 if (UNIT(s)->default_dependencies)
1283                         if ((r = service_add_default_dependencies(s)) < 0)
1284                                 return r;
1285
1286                 r = unit_patch_working_directory(UNIT(s), &s->exec_context);
1287                 if (r < 0)
1288                         return r;
1289         }
1290
1291         return service_verify(s);
1292 }
1293
1294 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1295
1296         ServiceExecCommand c;
1297         Service *s = SERVICE(u);
1298         const char *prefix2;
1299         char *p2;
1300
1301         assert(s);
1302
1303         p2 = strappend(prefix, "\t");
1304         prefix2 = p2 ? p2 : prefix;
1305
1306         fprintf(f,
1307                 "%sService State: %s\n"
1308                 "%sResult: %s\n"
1309                 "%sReload Result: %s\n"
1310                 "%sPermissionsStartOnly: %s\n"
1311                 "%sRootDirectoryStartOnly: %s\n"
1312                 "%sRemainAfterExit: %s\n"
1313                 "%sGuessMainPID: %s\n"
1314                 "%sType: %s\n"
1315                 "%sRestart: %s\n"
1316                 "%sNotifyAccess: %s\n",
1317                 prefix, service_state_to_string(s->state),
1318                 prefix, service_result_to_string(s->result),
1319                 prefix, service_result_to_string(s->reload_result),
1320                 prefix, yes_no(s->permissions_start_only),
1321                 prefix, yes_no(s->root_directory_start_only),
1322                 prefix, yes_no(s->remain_after_exit),
1323                 prefix, yes_no(s->guess_main_pid),
1324                 prefix, service_type_to_string(s->type),
1325                 prefix, service_restart_to_string(s->restart),
1326                 prefix, notify_access_to_string(s->notify_access));
1327
1328         if (s->control_pid > 0)
1329                 fprintf(f,
1330                         "%sControl PID: %lu\n",
1331                         prefix, (unsigned long) s->control_pid);
1332
1333         if (s->main_pid > 0)
1334                 fprintf(f,
1335                         "%sMain PID: %lu\n"
1336                         "%sMain PID Known: %s\n"
1337                         "%sMain PID Alien: %s\n",
1338                         prefix, (unsigned long) s->main_pid,
1339                         prefix, yes_no(s->main_pid_known),
1340                         prefix, yes_no(s->main_pid_alien));
1341
1342         if (s->pid_file)
1343                 fprintf(f,
1344                         "%sPIDFile: %s\n",
1345                         prefix, s->pid_file);
1346
1347         if (s->bus_name)
1348                 fprintf(f,
1349                         "%sBusName: %s\n"
1350                         "%sBus Name Good: %s\n",
1351                         prefix, s->bus_name,
1352                         prefix, yes_no(s->bus_name_good));
1353
1354         exec_context_dump(&s->exec_context, f, prefix);
1355
1356         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1357
1358                 if (!s->exec_command[c])
1359                         continue;
1360
1361                 fprintf(f, "%s-> %s:\n",
1362                         prefix, service_exec_command_to_string(c));
1363
1364                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1365         }
1366
1367 #ifdef HAVE_SYSV_COMPAT
1368         if (s->is_sysv)
1369                 fprintf(f,
1370                         "%sSysV Init Script has LSB Header: %s\n"
1371                         "%sSysVEnabled: %s\n",
1372                         prefix, yes_no(s->sysv_has_lsb),
1373                         prefix, yes_no(s->sysv_enabled));
1374
1375         if (s->sysv_start_priority >= 0)
1376                 fprintf(f,
1377                         "%sSysVStartPriority: %i\n",
1378                         prefix, s->sysv_start_priority);
1379
1380         if (s->sysv_runlevels)
1381                 fprintf(f, "%sSysVRunLevels: %s\n",
1382                         prefix, s->sysv_runlevels);
1383 #endif
1384
1385         if (s->fsck_passno > 0)
1386                 fprintf(f,
1387                         "%sFsckPassNo: %i\n",
1388                         prefix, s->fsck_passno);
1389
1390         if (s->status_text)
1391                 fprintf(f, "%sStatus Text: %s\n",
1392                         prefix, s->status_text);
1393
1394         free(p2);
1395 }
1396
1397 static int service_load_pid_file(Service *s, bool may_warn) {
1398         char *k;
1399         int r;
1400         pid_t pid;
1401
1402         assert(s);
1403
1404         if (!s->pid_file)
1405                 return -ENOENT;
1406
1407         if ((r = read_one_line_file(s->pid_file, &k)) < 0) {
1408                 if (may_warn)
1409                         log_info("PID file %s not readable (yet?) after %s.",
1410                                  s->pid_file, service_state_to_string(s->state));
1411                 return r;
1412         }
1413
1414         r = parse_pid(k, &pid);
1415         free(k);
1416
1417         if (r < 0)
1418                 return r;
1419
1420         if (kill(pid, 0) < 0 && errno != EPERM) {
1421                 if (may_warn)
1422                         log_info("PID %lu read from file %s does not exist.",
1423                                  (unsigned long) pid, s->pid_file);
1424                 return -ESRCH;
1425         }
1426
1427         if (s->main_pid_known) {
1428                 if (pid == s->main_pid)
1429                         return 0;
1430
1431                 log_debug("Main PID changing: %lu -> %lu",
1432                           (unsigned long) s->main_pid, (unsigned long) pid);
1433                 service_unwatch_main_pid(s);
1434                 s->main_pid_known = false;
1435         } else
1436                 log_debug("Main PID loaded: %lu", (unsigned long) pid);
1437
1438         if ((r = service_set_main_pid(s, pid)) < 0)
1439                 return r;
1440
1441         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1442                 /* FIXME: we need to do something here */
1443                 return r;
1444
1445         return 0;
1446 }
1447
1448 static int service_search_main_pid(Service *s) {
1449         pid_t pid;
1450         int r;
1451
1452         assert(s);
1453
1454         /* If we know it anyway, don't ever fallback to unreliable
1455          * heuristics */
1456         if (s->main_pid_known)
1457                 return 0;
1458
1459         if (!s->guess_main_pid)
1460                 return 0;
1461
1462         assert(s->main_pid <= 0);
1463
1464         if ((pid = cgroup_bonding_search_main_pid_list(UNIT(s)->cgroup_bondings)) <= 0)
1465                 return -ENOENT;
1466
1467         log_debug("Main PID guessed: %lu", (unsigned long) pid);
1468         if ((r = service_set_main_pid(s, pid)) < 0)
1469                 return r;
1470
1471         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1472                 /* FIXME: we need to do something here */
1473                 return r;
1474
1475         return 0;
1476 }
1477
1478 static void service_notify_sockets_dead(Service *s, bool failed_permanent) {
1479         Iterator i;
1480         Unit *u;
1481
1482         assert(s);
1483
1484         /* Notifies all our sockets when we die */
1485
1486         if (s->socket_fd >= 0)
1487                 return;
1488
1489         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i)
1490                 if (u->type == UNIT_SOCKET)
1491                         socket_notify_service_dead(SOCKET(u), failed_permanent);
1492
1493         return;
1494 }
1495
1496 static void service_set_state(Service *s, ServiceState state) {
1497         ServiceState old_state;
1498         const UnitActiveState *table;
1499         assert(s);
1500
1501         table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1502
1503         old_state = s->state;
1504         s->state = state;
1505
1506         service_unwatch_pid_file(s);
1507
1508         if (state != SERVICE_START_PRE &&
1509             state != SERVICE_START &&
1510             state != SERVICE_START_POST &&
1511             state != SERVICE_RELOAD &&
1512             state != SERVICE_STOP &&
1513             state != SERVICE_STOP_SIGTERM &&
1514             state != SERVICE_STOP_SIGKILL &&
1515             state != SERVICE_STOP_POST &&
1516             state != SERVICE_FINAL_SIGTERM &&
1517             state != SERVICE_FINAL_SIGKILL &&
1518             state != SERVICE_AUTO_RESTART)
1519                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1520
1521         if (state != SERVICE_START &&
1522             state != SERVICE_START_POST &&
1523             state != SERVICE_RUNNING &&
1524             state != SERVICE_RELOAD &&
1525             state != SERVICE_STOP &&
1526             state != SERVICE_STOP_SIGTERM &&
1527             state != SERVICE_STOP_SIGKILL) {
1528                 service_unwatch_main_pid(s);
1529                 s->main_command = NULL;
1530         }
1531
1532         if (state != SERVICE_START_PRE &&
1533             state != SERVICE_START &&
1534             state != SERVICE_START_POST &&
1535             state != SERVICE_RELOAD &&
1536             state != SERVICE_STOP &&
1537             state != SERVICE_STOP_SIGTERM &&
1538             state != SERVICE_STOP_SIGKILL &&
1539             state != SERVICE_STOP_POST &&
1540             state != SERVICE_FINAL_SIGTERM &&
1541             state != SERVICE_FINAL_SIGKILL) {
1542                 service_unwatch_control_pid(s);
1543                 s->control_command = NULL;
1544                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1545         }
1546
1547         if (state == SERVICE_DEAD ||
1548             state == SERVICE_STOP ||
1549             state == SERVICE_STOP_SIGTERM ||
1550             state == SERVICE_STOP_SIGKILL ||
1551             state == SERVICE_STOP_POST ||
1552             state == SERVICE_FINAL_SIGTERM ||
1553             state == SERVICE_FINAL_SIGKILL ||
1554             state == SERVICE_FAILED ||
1555             state == SERVICE_AUTO_RESTART)
1556                 service_notify_sockets_dead(s, false);
1557
1558         if (state != SERVICE_START_PRE &&
1559             state != SERVICE_START &&
1560             state != SERVICE_START_POST &&
1561             state != SERVICE_RUNNING &&
1562             state != SERVICE_RELOAD &&
1563             state != SERVICE_STOP &&
1564             state != SERVICE_STOP_SIGTERM &&
1565             state != SERVICE_STOP_SIGKILL &&
1566             state != SERVICE_STOP_POST &&
1567             state != SERVICE_FINAL_SIGTERM &&
1568             state != SERVICE_FINAL_SIGKILL &&
1569             !(state == SERVICE_DEAD && UNIT(s)->job)) {
1570                 service_close_socket_fd(s);
1571                 service_connection_unref(s);
1572         }
1573
1574         if (state == SERVICE_STOP)
1575                 service_stop_watchdog(s);
1576
1577         /* For the inactive states unit_notify() will trim the cgroup,
1578          * but for exit we have to do that ourselves... */
1579         if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1580                 cgroup_bonding_trim_list(UNIT(s)->cgroup_bondings, true);
1581
1582         if (old_state != state)
1583                 log_debug("%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
1584
1585         unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1586         s->reload_result = SERVICE_SUCCESS;
1587 }
1588
1589 static int service_coldplug(Unit *u) {
1590         Service *s = SERVICE(u);
1591         int r;
1592
1593         assert(s);
1594         assert(s->state == SERVICE_DEAD);
1595
1596         if (s->deserialized_state != s->state) {
1597
1598                 if (s->deserialized_state == SERVICE_START_PRE ||
1599                     s->deserialized_state == SERVICE_START ||
1600                     s->deserialized_state == SERVICE_START_POST ||
1601                     s->deserialized_state == SERVICE_RELOAD ||
1602                     s->deserialized_state == SERVICE_STOP ||
1603                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1604                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1605                     s->deserialized_state == SERVICE_STOP_POST ||
1606                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1607                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1608                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1609
1610                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1611                                 usec_t k;
1612
1613                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1614
1615                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1616                                         return r;
1617                         }
1618                 }
1619
1620                 if ((s->deserialized_state == SERVICE_START &&
1621                      (s->type == SERVICE_FORKING ||
1622                       s->type == SERVICE_DBUS ||
1623                       s->type == SERVICE_ONESHOT ||
1624                       s->type == SERVICE_NOTIFY)) ||
1625                     s->deserialized_state == SERVICE_START_POST ||
1626                     s->deserialized_state == SERVICE_RUNNING ||
1627                     s->deserialized_state == SERVICE_RELOAD ||
1628                     s->deserialized_state == SERVICE_STOP ||
1629                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1630                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1631                         if (s->main_pid > 0)
1632                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1633                                         return r;
1634
1635                 if (s->deserialized_state == SERVICE_START_PRE ||
1636                     s->deserialized_state == SERVICE_START ||
1637                     s->deserialized_state == SERVICE_START_POST ||
1638                     s->deserialized_state == SERVICE_RELOAD ||
1639                     s->deserialized_state == SERVICE_STOP ||
1640                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1641                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1642                     s->deserialized_state == SERVICE_STOP_POST ||
1643                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1644                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1645                         if (s->control_pid > 0)
1646                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1647                                         return r;
1648
1649                 if (s->deserialized_state == SERVICE_START_POST ||
1650                     s->deserialized_state == SERVICE_RUNNING)
1651                         service_handle_watchdog(s);
1652
1653                 service_set_state(s, s->deserialized_state);
1654         }
1655         return 0;
1656 }
1657
1658 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1659         Iterator i;
1660         int r;
1661         int *rfds = NULL;
1662         unsigned rn_fds = 0;
1663         Unit *u;
1664
1665         assert(s);
1666         assert(fds);
1667         assert(n_fds);
1668
1669         if (s->socket_fd >= 0)
1670                 return 0;
1671
1672         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1673                 int *cfds;
1674                 unsigned cn_fds;
1675                 Socket *sock;
1676
1677                 if (u->type != UNIT_SOCKET)
1678                         continue;
1679
1680                 sock = SOCKET(u);
1681
1682                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1683                         goto fail;
1684
1685                 if (!cfds)
1686                         continue;
1687
1688                 if (!rfds) {
1689                         rfds = cfds;
1690                         rn_fds = cn_fds;
1691                 } else {
1692                         int *t;
1693
1694                         if (!(t = new(int, rn_fds+cn_fds))) {
1695                                 free(cfds);
1696                                 r = -ENOMEM;
1697                                 goto fail;
1698                         }
1699
1700                         memcpy(t, rfds, rn_fds * sizeof(int));
1701                         memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1702                         free(rfds);
1703                         free(cfds);
1704
1705                         rfds = t;
1706                         rn_fds = rn_fds+cn_fds;
1707                 }
1708         }
1709
1710         *fds = rfds;
1711         *n_fds = rn_fds;
1712
1713         return 0;
1714
1715 fail:
1716         free(rfds);
1717
1718         return r;
1719 }
1720
1721 static int service_spawn(
1722                 Service *s,
1723                 ExecCommand *c,
1724                 bool timeout,
1725                 bool pass_fds,
1726                 bool apply_permissions,
1727                 bool apply_chroot,
1728                 bool apply_tty_stdin,
1729                 bool set_notify_socket,
1730                 bool is_control,
1731                 pid_t *_pid) {
1732
1733         pid_t pid;
1734         int r;
1735         int *fds = NULL, *fdsbuf = NULL;
1736         unsigned n_fds = 0, n_env = 0;
1737         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1738
1739         assert(s);
1740         assert(c);
1741         assert(_pid);
1742
1743         if (pass_fds ||
1744             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1745             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1746             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1747
1748                 if (s->socket_fd >= 0) {
1749                         fds = &s->socket_fd;
1750                         n_fds = 1;
1751                 } else {
1752                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1753                                 goto fail;
1754
1755                         fds = fdsbuf;
1756                 }
1757         }
1758
1759         if (timeout && s->timeout_usec) {
1760                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1761                         goto fail;
1762         } else
1763                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1764
1765         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1766                 r = -ENOMEM;
1767                 goto fail;
1768         }
1769
1770         if (!(our_env = new0(char*, 4))) {
1771                 r = -ENOMEM;
1772                 goto fail;
1773         }
1774
1775         if (set_notify_socket)
1776                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1777                         r = -ENOMEM;
1778                         goto fail;
1779                 }
1780
1781         if (s->main_pid > 0)
1782                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1783                         r = -ENOMEM;
1784                         goto fail;
1785                 }
1786
1787         if (s->watchdog_usec > 0)
1788                 if (asprintf(our_env + n_env++, "WATCHDOG_USEC=%llu", (unsigned long long) s->watchdog_usec) < 0) {
1789                         r = -ENOMEM;
1790                         goto fail;
1791                 }
1792
1793         if (!(final_env = strv_env_merge(2,
1794                                          UNIT(s)->manager->environment,
1795                                          our_env,
1796                                          NULL))) {
1797                 r = -ENOMEM;
1798                 goto fail;
1799         }
1800
1801         r = exec_spawn(c,
1802                        argv,
1803                        &s->exec_context,
1804                        fds, n_fds,
1805                        final_env,
1806                        apply_permissions,
1807                        apply_chroot,
1808                        apply_tty_stdin,
1809                        UNIT(s)->manager->confirm_spawn,
1810                        UNIT(s)->cgroup_bondings,
1811                        UNIT(s)->cgroup_attributes,
1812                        is_control ? "control" : NULL,
1813                        UNIT(s)->id,
1814                        s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
1815                        &pid);
1816
1817         if (r < 0)
1818                 goto fail;
1819
1820
1821         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1822                 /* FIXME: we need to do something here */
1823                 goto fail;
1824
1825         free(fdsbuf);
1826         strv_free(argv);
1827         strv_free(our_env);
1828         strv_free(final_env);
1829
1830         *_pid = pid;
1831
1832         return 0;
1833
1834 fail:
1835         free(fdsbuf);
1836         strv_free(argv);
1837         strv_free(our_env);
1838         strv_free(final_env);
1839
1840         if (timeout)
1841                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1842
1843         return r;
1844 }
1845
1846 static int main_pid_good(Service *s) {
1847         assert(s);
1848
1849         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1850          * don't know */
1851
1852         /* If we know the pid file, then lets just check if it is
1853          * still valid */
1854         if (s->main_pid_known) {
1855
1856                 /* If it's an alien child let's check if it is still
1857                  * alive ... */
1858                 if (s->main_pid_alien)
1859                         return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1860
1861                 /* .. otherwise assume we'll get a SIGCHLD for it,
1862                  * which we really should wait for to collect exit
1863                  * status and code */
1864                 return s->main_pid > 0;
1865         }
1866
1867         /* We don't know the pid */
1868         return -EAGAIN;
1869 }
1870
1871 static int control_pid_good(Service *s) {
1872         assert(s);
1873
1874         return s->control_pid > 0;
1875 }
1876
1877 static int cgroup_good(Service *s) {
1878         int r;
1879
1880         assert(s);
1881
1882         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->cgroup_bondings)) < 0)
1883                 return r;
1884
1885         return !r;
1886 }
1887
1888 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1889         int r;
1890         assert(s);
1891
1892         if (f != SERVICE_SUCCESS)
1893                 s->result = f;
1894
1895         service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1896
1897         if (allow_restart &&
1898             !s->forbid_restart &&
1899             (s->restart == SERVICE_RESTART_ALWAYS ||
1900              (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1901              (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1902              (s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
1903                                                          s->result == SERVICE_FAILURE_CORE_DUMP)))) {
1904
1905                 r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch);
1906                 if (r < 0)
1907                         goto fail;
1908
1909                 service_set_state(s, SERVICE_AUTO_RESTART);
1910         }
1911
1912         s->forbid_restart = false;
1913
1914         return;
1915
1916 fail:
1917         log_warning("%s failed to run install restart timer: %s", UNIT(s)->id, strerror(-r));
1918         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1919 }
1920
1921 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
1922
1923 static void service_enter_stop_post(Service *s, ServiceResult f) {
1924         int r;
1925         assert(s);
1926
1927         if (f != SERVICE_SUCCESS)
1928                 s->result = f;
1929
1930         service_unwatch_control_pid(s);
1931
1932         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1933                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1934
1935                 r = service_spawn(s,
1936                                   s->control_command,
1937                                   true,
1938                                   false,
1939                                   !s->permissions_start_only,
1940                                   !s->root_directory_start_only,
1941                                   true,
1942                                   false,
1943                                   true,
1944                                   &s->control_pid);
1945                 if (r < 0)
1946                         goto fail;
1947
1948
1949                 service_set_state(s, SERVICE_STOP_POST);
1950         } else
1951                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1952
1953         return;
1954
1955 fail:
1956         log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r));
1957         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1958 }
1959
1960 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1961         int r;
1962         Set *pid_set = NULL;
1963         bool wait_for_exit = false;
1964
1965         assert(s);
1966
1967         if (f != SERVICE_SUCCESS)
1968                 s->result = f;
1969
1970         if (s->exec_context.kill_mode != KILL_NONE) {
1971                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1972
1973                 if (s->main_pid > 0) {
1974                         if (kill_and_sigcont(s->main_pid, sig) < 0 && errno != ESRCH)
1975                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1976                         else
1977                                 wait_for_exit = !s->main_pid_alien;
1978                 }
1979
1980                 if (s->control_pid > 0) {
1981                         if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1982                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1983                         else
1984                                 wait_for_exit = true;
1985                 }
1986
1987                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1988
1989                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1990                                 r = -ENOMEM;
1991                                 goto fail;
1992                         }
1993
1994                         /* Exclude the main/control pids from being killed via the cgroup */
1995                         if (s->main_pid > 0)
1996                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1997                                         goto fail;
1998
1999                         if (s->control_pid > 0)
2000                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
2001                                         goto fail;
2002
2003                         r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, false, pid_set, NULL);
2004                         if (r < 0) {
2005                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
2006                                         log_warning("Failed to kill control group: %s", strerror(-r));
2007                         } else if (r > 0)
2008                                 wait_for_exit = true;
2009
2010                         set_free(pid_set);
2011                         pid_set = NULL;
2012                 }
2013         }
2014
2015         if (wait_for_exit) {
2016                 if (s->timeout_usec > 0)
2017                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
2018                                 goto fail;
2019
2020                 service_set_state(s, state);
2021         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
2022                 service_enter_stop_post(s, SERVICE_SUCCESS);
2023         else
2024                 service_enter_dead(s, SERVICE_SUCCESS, true);
2025
2026         return;
2027
2028 fail:
2029         log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
2030
2031         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
2032                 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
2033         else
2034                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2035
2036         if (pid_set)
2037                 set_free(pid_set);
2038 }
2039
2040 static void service_enter_stop(Service *s, ServiceResult f) {
2041         int r;
2042
2043         assert(s);
2044
2045         if (f != SERVICE_SUCCESS)
2046                 s->result = f;
2047
2048         service_unwatch_control_pid(s);
2049
2050         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
2051                 s->control_command_id = SERVICE_EXEC_STOP;
2052
2053                 r = service_spawn(s,
2054                                   s->control_command,
2055                                   true,
2056                                   false,
2057                                   !s->permissions_start_only,
2058                                   !s->root_directory_start_only,
2059                                   false,
2060                                   false,
2061                                   true,
2062                                   &s->control_pid);
2063                 if (r < 0)
2064                         goto fail;
2065
2066                 service_set_state(s, SERVICE_STOP);
2067         } else
2068                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2069
2070         return;
2071
2072 fail:
2073         log_warning("%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2074         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2075 }
2076
2077 static void service_enter_running(Service *s, ServiceResult f) {
2078         int main_pid_ok, cgroup_ok;
2079         assert(s);
2080
2081         if (f != SERVICE_SUCCESS)
2082                 s->result = f;
2083
2084         main_pid_ok = main_pid_good(s);
2085         cgroup_ok = cgroup_good(s);
2086
2087         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2088             (s->bus_name_good || s->type != SERVICE_DBUS))
2089                 service_set_state(s, SERVICE_RUNNING);
2090         else if (s->remain_after_exit)
2091                 service_set_state(s, SERVICE_EXITED);
2092         else
2093                 service_enter_stop(s, SERVICE_SUCCESS);
2094 }
2095
2096 static void service_enter_start_post(Service *s) {
2097         int r;
2098         assert(s);
2099
2100         service_unwatch_control_pid(s);
2101
2102         if (s->watchdog_usec > 0)
2103                 service_reset_watchdog(s);
2104
2105         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
2106                 s->control_command_id = SERVICE_EXEC_START_POST;
2107
2108                 r = service_spawn(s,
2109                                   s->control_command,
2110                                   true,
2111                                   false,
2112                                   !s->permissions_start_only,
2113                                   !s->root_directory_start_only,
2114                                   false,
2115                                   false,
2116                                   true,
2117                                   &s->control_pid);
2118                 if (r < 0)
2119                         goto fail;
2120
2121                 service_set_state(s, SERVICE_START_POST);
2122         } else
2123                 service_enter_running(s, SERVICE_SUCCESS);
2124
2125         return;
2126
2127 fail:
2128         log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2129         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2130 }
2131
2132 static void service_enter_start(Service *s) {
2133         pid_t pid;
2134         int r;
2135         ExecCommand *c;
2136
2137         assert(s);
2138
2139         assert(s->exec_command[SERVICE_EXEC_START]);
2140         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2141
2142         if (s->type == SERVICE_FORKING)
2143                 service_unwatch_control_pid(s);
2144         else
2145                 service_unwatch_main_pid(s);
2146
2147         /* We want to ensure that nobody leaks processes from
2148          * START_PRE here, so let's go on a killing spree, People
2149          * should not spawn long running processes from START_PRE. */
2150         cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, true, NULL, "control");
2151
2152         if (s->type == SERVICE_FORKING) {
2153                 s->control_command_id = SERVICE_EXEC_START;
2154                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2155
2156                 s->main_command = NULL;
2157         } else {
2158                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2159                 s->control_command = NULL;
2160
2161                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2162         }
2163
2164         r = service_spawn(s,
2165                           c,
2166                           s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
2167                           true,
2168                           true,
2169                           true,
2170                           true,
2171                           s->notify_access != NOTIFY_NONE,
2172                           false,
2173                           &pid);
2174         if (r < 0)
2175                 goto fail;
2176
2177         if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
2178                 /* For simple services we immediately start
2179                  * the START_POST binaries. */
2180
2181                 service_set_main_pid(s, pid);
2182                 service_enter_start_post(s);
2183
2184         } else  if (s->type == SERVICE_FORKING) {
2185
2186                 /* For forking services we wait until the start
2187                  * process exited. */
2188
2189                 s->control_pid = pid;
2190                 service_set_state(s, SERVICE_START);
2191
2192         } else if (s->type == SERVICE_ONESHOT ||
2193                    s->type == SERVICE_DBUS ||
2194                    s->type == SERVICE_NOTIFY) {
2195
2196                 /* For oneshot services we wait until the start
2197                  * process exited, too, but it is our main process. */
2198
2199                 /* For D-Bus services we know the main pid right away,
2200                  * but wait for the bus name to appear on the
2201                  * bus. Notify services are similar. */
2202
2203                 service_set_main_pid(s, pid);
2204                 service_set_state(s, SERVICE_START);
2205         } else
2206                 assert_not_reached("Unknown service type");
2207
2208         return;
2209
2210 fail:
2211         log_warning("%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2212         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2213 }
2214
2215 static void service_enter_start_pre(Service *s) {
2216         int r;
2217
2218         assert(s);
2219
2220         service_unwatch_control_pid(s);
2221
2222         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2223
2224                 /* Before we start anything, let's clear up what might
2225                  * be left from previous runs. */
2226                 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, true, NULL, "control");
2227
2228                 s->control_command_id = SERVICE_EXEC_START_PRE;
2229
2230                 r = service_spawn(s,
2231                                   s->control_command,
2232                                   true,
2233                                   false,
2234                                   !s->permissions_start_only,
2235                                   !s->root_directory_start_only,
2236                                   true,
2237                                   false,
2238                                   true,
2239                                   &s->control_pid);
2240                 if (r < 0)
2241                         goto fail;
2242
2243                 service_set_state(s, SERVICE_START_PRE);
2244         } else
2245                 service_enter_start(s);
2246
2247         return;
2248
2249 fail:
2250         log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2251         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2252 }
2253
2254 static void service_enter_restart(Service *s) {
2255         int r;
2256         DBusError error;
2257
2258         assert(s);
2259         dbus_error_init(&error);
2260
2261         if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2262                 /* Don't restart things if we are going down anyway */
2263                 log_info("Stop job pending for unit, delaying automatic restart.");
2264
2265                 r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch);
2266                 if (r < 0)
2267                         goto fail;
2268
2269                 return;
2270         }
2271
2272         /* Any units that are bound to this service must also be
2273          * restarted. We use JOB_RESTART (instead of the more obvious
2274          * JOB_START) here so that those dependency jobs will be added
2275          * as well. */
2276         r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
2277         if (r < 0)
2278                 goto fail;
2279
2280         /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2281          * it will be canceled as part of the service_stop() call that
2282          * is executed as part of JOB_RESTART. */
2283
2284         log_debug("%s scheduled restart job.", UNIT(s)->id);
2285         return;
2286
2287 fail:
2288         log_warning("%s failed to schedule restart job: %s", UNIT(s)->id, bus_error(&error, -r));
2289         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2290
2291         dbus_error_free(&error);
2292 }
2293
2294 static void service_enter_reload(Service *s) {
2295         int r;
2296
2297         assert(s);
2298
2299         service_unwatch_control_pid(s);
2300
2301         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2302                 s->control_command_id = SERVICE_EXEC_RELOAD;
2303
2304                 r = service_spawn(s,
2305                                   s->control_command,
2306                                   true,
2307                                   false,
2308                                   !s->permissions_start_only,
2309                                   !s->root_directory_start_only,
2310                                   false,
2311                                   false,
2312                                   true,
2313                                   &s->control_pid);
2314                 if (r < 0)
2315                         goto fail;
2316
2317                 service_set_state(s, SERVICE_RELOAD);
2318         } else
2319                 service_enter_running(s, SERVICE_SUCCESS);
2320
2321         return;
2322
2323 fail:
2324         log_warning("%s failed to run 'reload' task: %s", UNIT(s)->id, strerror(-r));
2325         s->reload_result = SERVICE_FAILURE_RESOURCES;
2326         service_enter_running(s, SERVICE_SUCCESS);
2327 }
2328
2329 static void service_run_next_control(Service *s) {
2330         int r;
2331
2332         assert(s);
2333         assert(s->control_command);
2334         assert(s->control_command->command_next);
2335
2336         assert(s->control_command_id != SERVICE_EXEC_START);
2337
2338         s->control_command = s->control_command->command_next;
2339         service_unwatch_control_pid(s);
2340
2341         r = service_spawn(s,
2342                           s->control_command,
2343                           true,
2344                           false,
2345                           !s->permissions_start_only,
2346                           !s->root_directory_start_only,
2347                           s->control_command_id == SERVICE_EXEC_START_PRE ||
2348                           s->control_command_id == SERVICE_EXEC_STOP_POST,
2349                           false,
2350                           true,
2351                           &s->control_pid);
2352         if (r < 0)
2353                 goto fail;
2354
2355         return;
2356
2357 fail:
2358         log_warning("%s failed to run next control task: %s", UNIT(s)->id, strerror(-r));
2359
2360         if (s->state == SERVICE_START_PRE)
2361                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2362         else if (s->state == SERVICE_STOP)
2363                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2364         else if (s->state == SERVICE_STOP_POST)
2365                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2366         else if (s->state == SERVICE_RELOAD) {
2367                 s->reload_result = SERVICE_FAILURE_RESOURCES;
2368                 service_enter_running(s, SERVICE_SUCCESS);
2369         } else
2370                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2371 }
2372
2373 static void service_run_next_main(Service *s) {
2374         pid_t pid;
2375         int r;
2376
2377         assert(s);
2378         assert(s->main_command);
2379         assert(s->main_command->command_next);
2380         assert(s->type == SERVICE_ONESHOT);
2381
2382         s->main_command = s->main_command->command_next;
2383         service_unwatch_main_pid(s);
2384
2385         r = service_spawn(s,
2386                           s->main_command,
2387                           true,
2388                           true,
2389                           true,
2390                           true,
2391                           true,
2392                           s->notify_access != NOTIFY_NONE,
2393                           false,
2394                           &pid);
2395         if (r < 0)
2396                 goto fail;
2397
2398         service_set_main_pid(s, pid);
2399
2400         return;
2401
2402 fail:
2403         log_warning("%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2404         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2405 }
2406
2407 static int service_start_limit_test(Service *s) {
2408         assert(s);
2409
2410         if (ratelimit_test(&s->start_limit))
2411                 return 0;
2412
2413         switch (s->start_limit_action) {
2414
2415         case SERVICE_START_LIMIT_NONE:
2416                 log_warning("%s start request repeated too quickly, refusing to start.", UNIT(s)->id);
2417                 break;
2418
2419         case SERVICE_START_LIMIT_REBOOT: {
2420                 DBusError error;
2421                 int r;
2422
2423                 dbus_error_init(&error);
2424
2425                 log_warning("%s start request repeated too quickly, rebooting.", UNIT(s)->id);
2426
2427                 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE, true, &error, NULL);
2428                 if (r < 0) {
2429                         log_error("Failed to reboot: %s.", bus_error(&error, r));
2430                         dbus_error_free(&error);
2431                 }
2432
2433                 break;
2434         }
2435
2436         case SERVICE_START_LIMIT_REBOOT_FORCE:
2437                 log_warning("%s start request repeated too quickly, forcibly rebooting.", UNIT(s)->id);
2438                 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2439                 break;
2440
2441         case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
2442                 log_warning("%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
2443                 reboot(RB_AUTOBOOT);
2444                 break;
2445
2446         default:
2447                 log_error("start limit action=%i", s->start_limit_action);
2448                 assert_not_reached("Unknown StartLimitAction.");
2449         }
2450
2451         return -ECANCELED;
2452 }
2453
2454 static int service_start(Unit *u) {
2455         Service *s = SERVICE(u);
2456         int r;
2457
2458         assert(s);
2459
2460         /* We cannot fulfill this request right now, try again later
2461          * please! */
2462         if (s->state == SERVICE_STOP ||
2463             s->state == SERVICE_STOP_SIGTERM ||
2464             s->state == SERVICE_STOP_SIGKILL ||
2465             s->state == SERVICE_STOP_POST ||
2466             s->state == SERVICE_FINAL_SIGTERM ||
2467             s->state == SERVICE_FINAL_SIGKILL)
2468                 return -EAGAIN;
2469
2470         /* Already on it! */
2471         if (s->state == SERVICE_START_PRE ||
2472             s->state == SERVICE_START ||
2473             s->state == SERVICE_START_POST)
2474                 return 0;
2475
2476         /* A service that will be restarted must be stopped first to
2477          * trigger BindsTo and/or OnFailure dependencies. If a user
2478          * does not want to wait for the holdoff time to elapse, the
2479          * service should be manually restarted, not started. We
2480          * simply return EAGAIN here, so that any start jobs stay
2481          * queued, and assume that the auto restart timer will
2482          * eventually trigger the restart. */
2483         if (s->state == SERVICE_AUTO_RESTART)
2484                 return -EAGAIN;
2485
2486         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
2487
2488         /* Make sure we don't enter a busy loop of some kind. */
2489         r = service_start_limit_test(s);
2490         if (r < 0) {
2491                 service_notify_sockets_dead(s, true);
2492                 return r;
2493         }
2494
2495         s->result = SERVICE_SUCCESS;
2496         s->reload_result = SERVICE_SUCCESS;
2497         s->main_pid_known = false;
2498         s->main_pid_alien = false;
2499         s->forbid_restart = false;
2500
2501         service_enter_start_pre(s);
2502         return 0;
2503 }
2504
2505 static int service_stop(Unit *u) {
2506         Service *s = SERVICE(u);
2507
2508         assert(s);
2509
2510         /* Don't create restart jobs from here. */
2511         s->forbid_restart = true;
2512
2513         /* Already on it */
2514         if (s->state == SERVICE_STOP ||
2515             s->state == SERVICE_STOP_SIGTERM ||
2516             s->state == SERVICE_STOP_SIGKILL ||
2517             s->state == SERVICE_STOP_POST ||
2518             s->state == SERVICE_FINAL_SIGTERM ||
2519             s->state == SERVICE_FINAL_SIGKILL)
2520                 return 0;
2521
2522         /* A restart will be scheduled or is in progress. */
2523         if (s->state == SERVICE_AUTO_RESTART) {
2524                 service_set_state(s, SERVICE_DEAD);
2525                 return 0;
2526         }
2527
2528         /* If there's already something running we go directly into
2529          * kill mode. */
2530         if (s->state == SERVICE_START_PRE ||
2531             s->state == SERVICE_START ||
2532             s->state == SERVICE_START_POST ||
2533             s->state == SERVICE_RELOAD) {
2534                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2535                 return 0;
2536         }
2537
2538         assert(s->state == SERVICE_RUNNING ||
2539                s->state == SERVICE_EXITED);
2540
2541         service_enter_stop(s, SERVICE_SUCCESS);
2542         return 0;
2543 }
2544
2545 static int service_reload(Unit *u) {
2546         Service *s = SERVICE(u);
2547
2548         assert(s);
2549
2550         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2551
2552         service_enter_reload(s);
2553         return 0;
2554 }
2555
2556 static bool service_can_reload(Unit *u) {
2557         Service *s = SERVICE(u);
2558
2559         assert(s);
2560
2561         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2562 }
2563
2564 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2565         Service *s = SERVICE(u);
2566
2567         assert(u);
2568         assert(f);
2569         assert(fds);
2570
2571         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2572         unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2573         unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2574
2575         if (s->control_pid > 0)
2576                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2577
2578         if (s->main_pid_known && s->main_pid > 0)
2579                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2580
2581         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2582
2583         if (s->status_text)
2584                 unit_serialize_item(u, f, "status-text", s->status_text);
2585
2586         /* FIXME: There's a minor uncleanliness here: if there are
2587          * multiple commands attached here, we will start from the
2588          * first one again */
2589         if (s->control_command_id >= 0)
2590                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2591
2592         if (s->socket_fd >= 0) {
2593                 int copy;
2594
2595                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2596                         return copy;
2597
2598                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2599         }
2600
2601         if (s->main_exec_status.pid > 0) {
2602                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2603                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2604                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2605
2606                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2607                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2608                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2609                 }
2610         }
2611         if (dual_timestamp_is_set(&s->watchdog_timestamp))
2612                 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2613
2614         return 0;
2615 }
2616
2617 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2618         Service *s = SERVICE(u);
2619
2620         assert(u);
2621         assert(key);
2622         assert(value);
2623         assert(fds);
2624
2625         if (streq(key, "state")) {
2626                 ServiceState state;
2627
2628                 if ((state = service_state_from_string(value)) < 0)
2629                         log_debug("Failed to parse state value %s", value);
2630                 else
2631                         s->deserialized_state = state;
2632         } else if (streq(key, "result")) {
2633                 ServiceResult f;
2634
2635                 f = service_result_from_string(value);
2636                 if (f < 0)
2637                         log_debug("Failed to parse result value %s", value);
2638                 else if (f != SERVICE_SUCCESS)
2639                         s->result = f;
2640
2641         } else if (streq(key, "reload-result")) {
2642                 ServiceResult f;
2643
2644                 f = service_result_from_string(value);
2645                 if (f < 0)
2646                         log_debug("Failed to parse reload result value %s", value);
2647                 else if (f != SERVICE_SUCCESS)
2648                         s->reload_result = f;
2649
2650         } else if (streq(key, "control-pid")) {
2651                 pid_t pid;
2652
2653                 if (parse_pid(value, &pid) < 0)
2654                         log_debug("Failed to parse control-pid value %s", value);
2655                 else
2656                         s->control_pid = pid;
2657         } else if (streq(key, "main-pid")) {
2658                 pid_t pid;
2659
2660                 if (parse_pid(value, &pid) < 0)
2661                         log_debug("Failed to parse main-pid value %s", value);
2662                 else
2663                         service_set_main_pid(s, (pid_t) pid);
2664         } else if (streq(key, "main-pid-known")) {
2665                 int b;
2666
2667                 if ((b = parse_boolean(value)) < 0)
2668                         log_debug("Failed to parse main-pid-known value %s", value);
2669                 else
2670                         s->main_pid_known = b;
2671         } else if (streq(key, "status-text")) {
2672                 char *t;
2673
2674                 if ((t = strdup(value))) {
2675                         free(s->status_text);
2676                         s->status_text = t;
2677                 }
2678
2679         } else if (streq(key, "control-command")) {
2680                 ServiceExecCommand id;
2681
2682                 if ((id = service_exec_command_from_string(value)) < 0)
2683                         log_debug("Failed to parse exec-command value %s", value);
2684                 else {
2685                         s->control_command_id = id;
2686                         s->control_command = s->exec_command[id];
2687                 }
2688         } else if (streq(key, "socket-fd")) {
2689                 int fd;
2690
2691                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2692                         log_debug("Failed to parse socket-fd value %s", value);
2693                 else {
2694
2695                         if (s->socket_fd >= 0)
2696                                 close_nointr_nofail(s->socket_fd);
2697                         s->socket_fd = fdset_remove(fds, fd);
2698                 }
2699         } else if (streq(key, "main-exec-status-pid")) {
2700                 pid_t pid;
2701
2702                 if (parse_pid(value, &pid) < 0)
2703                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2704                 else
2705                         s->main_exec_status.pid = pid;
2706         } else if (streq(key, "main-exec-status-code")) {
2707                 int i;
2708
2709                 if (safe_atoi(value, &i) < 0)
2710                         log_debug("Failed to parse main-exec-status-code value %s", value);
2711                 else
2712                         s->main_exec_status.code = i;
2713         } else if (streq(key, "main-exec-status-status")) {
2714                 int i;
2715
2716                 if (safe_atoi(value, &i) < 0)
2717                         log_debug("Failed to parse main-exec-status-status value %s", value);
2718                 else
2719                         s->main_exec_status.status = i;
2720         } else if (streq(key, "main-exec-status-start"))
2721                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2722         else if (streq(key, "main-exec-status-exit"))
2723                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2724         else if (streq(key, "watchdog-timestamp"))
2725                 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2726         else
2727                 log_debug("Unknown serialization key '%s'", key);
2728
2729         return 0;
2730 }
2731
2732 static UnitActiveState service_active_state(Unit *u) {
2733         const UnitActiveState *table;
2734
2735         assert(u);
2736
2737         table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2738
2739         return table[SERVICE(u)->state];
2740 }
2741
2742 static const char *service_sub_state_to_string(Unit *u) {
2743         assert(u);
2744
2745         return service_state_to_string(SERVICE(u)->state);
2746 }
2747
2748 static bool service_check_gc(Unit *u) {
2749         Service *s = SERVICE(u);
2750
2751         assert(s);
2752
2753         /* Never clean up services that still have a process around,
2754          * even if the service is formally dead. */
2755         if (cgroup_good(s) > 0 ||
2756             main_pid_good(s) > 0 ||
2757             control_pid_good(s) > 0)
2758                 return true;
2759
2760 #ifdef HAVE_SYSV_COMPAT
2761         if (s->is_sysv)
2762                 return true;
2763 #endif
2764
2765         return false;
2766 }
2767
2768 static bool service_check_snapshot(Unit *u) {
2769         Service *s = SERVICE(u);
2770
2771         assert(s);
2772
2773         return !s->got_socket_fd;
2774 }
2775
2776 static int service_retry_pid_file(Service *s) {
2777         int r;
2778
2779         assert(s->pid_file);
2780         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2781
2782         r = service_load_pid_file(s, false);
2783         if (r < 0)
2784                 return r;
2785
2786         service_unwatch_pid_file(s);
2787
2788         service_enter_running(s, SERVICE_SUCCESS);
2789         return 0;
2790 }
2791
2792 static int service_watch_pid_file(Service *s) {
2793         int r;
2794
2795         log_debug("Setting watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
2796         r = path_spec_watch(s->pid_file_pathspec, UNIT(s));
2797         if (r < 0)
2798                 goto fail;
2799
2800         /* the pidfile might have appeared just before we set the watch */
2801         service_retry_pid_file(s);
2802
2803         return 0;
2804 fail:
2805         log_error("Failed to set a watch for %s's PID file %s: %s",
2806                   UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2807         service_unwatch_pid_file(s);
2808         return r;
2809 }
2810
2811 static int service_demand_pid_file(Service *s) {
2812         PathSpec *ps;
2813
2814         assert(s->pid_file);
2815         assert(!s->pid_file_pathspec);
2816
2817         ps = new0(PathSpec, 1);
2818         if (!ps)
2819                 return -ENOMEM;
2820
2821         ps->path = strdup(s->pid_file);
2822         if (!ps->path) {
2823                 free(ps);
2824                 return -ENOMEM;
2825         }
2826
2827         path_kill_slashes(ps->path);
2828
2829         /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2830          * keep their PID file open all the time. */
2831         ps->type = PATH_MODIFIED;
2832         ps->inotify_fd = -1;
2833
2834         s->pid_file_pathspec = ps;
2835
2836         return service_watch_pid_file(s);
2837 }
2838
2839 static void service_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
2840         Service *s = SERVICE(u);
2841
2842         assert(s);
2843         assert(fd >= 0);
2844         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2845         assert(s->pid_file_pathspec);
2846         assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2847
2848         log_debug("inotify event for %s", u->id);
2849
2850         if (path_spec_fd_event(s->pid_file_pathspec, events) < 0)
2851                 goto fail;
2852
2853         if (service_retry_pid_file(s) == 0)
2854                 return;
2855
2856         if (service_watch_pid_file(s) < 0)
2857                 goto fail;
2858
2859         return;
2860 fail:
2861         service_unwatch_pid_file(s);
2862         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2863 }
2864
2865 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2866         Service *s = SERVICE(u);
2867         ServiceResult f;
2868
2869         assert(s);
2870         assert(pid >= 0);
2871
2872         if (UNIT(s)->fragment_path ? is_clean_exit(code, status) : is_clean_exit_lsb(code, status))
2873                 f = SERVICE_SUCCESS;
2874         else if (code == CLD_EXITED)
2875                 f = SERVICE_FAILURE_EXIT_CODE;
2876         else if (code == CLD_KILLED)
2877                 f = SERVICE_FAILURE_SIGNAL;
2878         else if (code == CLD_DUMPED)
2879                 f = SERVICE_FAILURE_CORE_DUMP;
2880         else
2881                 assert_not_reached("Unknown code");
2882
2883         if (s->main_pid == pid) {
2884                 /* Forking services may occasionally move to a new PID.
2885                  * As long as they update the PID file before exiting the old
2886                  * PID, they're fine. */
2887                 if (service_load_pid_file(s, false) == 0)
2888                         return;
2889
2890                 s->main_pid = 0;
2891                 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2892
2893                 /* If this is not a forking service than the main
2894                  * process got started and hence we copy the exit
2895                  * status so that it is recorded both as main and as
2896                  * control process exit status */
2897                 if (s->main_command) {
2898                         s->main_command->exec_status = s->main_exec_status;
2899
2900                         if (s->main_command->ignore)
2901                                 f = SERVICE_SUCCESS;
2902                 }
2903
2904                 log_full(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2905                          "%s: main process exited, code=%s, status=%i", u->id, sigchld_code_to_string(code), status);
2906
2907                 if (f != SERVICE_SUCCESS)
2908                         s->result = f;
2909
2910                 if (s->main_command &&
2911                     s->main_command->command_next &&
2912                     f == SERVICE_SUCCESS) {
2913
2914                         /* There is another command to *
2915                          * execute, so let's do that. */
2916
2917                         log_debug("%s running next main command for state %s", u->id, service_state_to_string(s->state));
2918                         service_run_next_main(s);
2919
2920                 } else {
2921
2922                         /* The service exited, so the service is officially
2923                          * gone. */
2924                         s->main_command = NULL;
2925
2926                         switch (s->state) {
2927
2928                         case SERVICE_START_POST:
2929                         case SERVICE_RELOAD:
2930                         case SERVICE_STOP:
2931                                 /* Need to wait until the operation is
2932                                  * done */
2933                                 break;
2934
2935                         case SERVICE_START:
2936                                 if (s->type == SERVICE_ONESHOT) {
2937                                         /* This was our main goal, so let's go on */
2938                                         if (f == SERVICE_SUCCESS)
2939                                                 service_enter_start_post(s);
2940                                         else
2941                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2942                                         break;
2943                                 } else {
2944                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2945
2946                                         /* Fall through */
2947                                 }
2948
2949                         case SERVICE_RUNNING:
2950                                 service_enter_running(s, f);
2951                                 break;
2952
2953                         case SERVICE_STOP_SIGTERM:
2954                         case SERVICE_STOP_SIGKILL:
2955
2956                                 if (!control_pid_good(s))
2957                                         service_enter_stop_post(s, f);
2958
2959                                 /* If there is still a control process, wait for that first */
2960                                 break;
2961
2962                         default:
2963                                 assert_not_reached("Uh, main process died at wrong time.");
2964                         }
2965                 }
2966
2967         } else if (s->control_pid == pid) {
2968
2969                 s->control_pid = 0;
2970
2971                 if (s->control_command) {
2972                         exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2973
2974                         if (s->control_command->ignore)
2975                                 f = SERVICE_SUCCESS;
2976                 }
2977
2978                 log_full(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2979                          "%s: control process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
2980
2981                 if (f != SERVICE_SUCCESS)
2982                         s->result = f;
2983
2984                 /* Immediately get rid of the cgroup, so that the
2985                  * kernel doesn't delay the cgroup empty messages for
2986                  * the service cgroup any longer than necessary */
2987                 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, true, NULL, "control");
2988
2989                 if (s->control_command &&
2990                     s->control_command->command_next &&
2991                     f == SERVICE_SUCCESS) {
2992
2993                         /* There is another command to *
2994                          * execute, so let's do that. */
2995
2996                         log_debug("%s running next control command for state %s", u->id, service_state_to_string(s->state));
2997                         service_run_next_control(s);
2998
2999                 } else {
3000                         /* No further commands for this step, so let's
3001                          * figure out what to do next */
3002
3003                         s->control_command = NULL;
3004                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3005
3006                         log_debug("%s got final SIGCHLD for state %s", u->id, service_state_to_string(s->state));
3007
3008                         switch (s->state) {
3009
3010                         case SERVICE_START_PRE:
3011                                 if (f == SERVICE_SUCCESS)
3012                                         service_enter_start(s);
3013                                 else
3014                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3015                                 break;
3016
3017                         case SERVICE_START:
3018                                 assert(s->type == SERVICE_FORKING);
3019
3020                                 if (f != SERVICE_SUCCESS) {
3021                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3022                                         break;
3023                                 }
3024
3025                                 if (s->pid_file) {
3026                                         bool has_start_post;
3027                                         int r;
3028
3029                                         /* Let's try to load the pid file here if we can.
3030                                          * The PID file might actually be created by a START_POST
3031                                          * script. In that case don't worry if the loading fails. */
3032
3033                                         has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3034                                         r = service_load_pid_file(s, !has_start_post);
3035                                         if (!has_start_post && r < 0) {
3036                                                 r = service_demand_pid_file(s);
3037                                                 if (r < 0 || !cgroup_good(s))
3038                                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3039                                                 break;
3040                                         }
3041                                 } else
3042                                         service_search_main_pid(s);
3043
3044                                 service_enter_start_post(s);
3045                                 break;
3046
3047                         case SERVICE_START_POST:
3048                                 if (f != SERVICE_SUCCESS) {
3049                                         service_enter_stop(s, f);
3050                                         break;
3051                                 }
3052
3053                                 if (s->pid_file) {
3054                                         int r;
3055
3056                                         r = service_load_pid_file(s, true);
3057                                         if (r < 0) {
3058                                                 r = service_demand_pid_file(s);
3059                                                 if (r < 0 || !cgroup_good(s))
3060                                                         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3061                                                 break;
3062                                         }
3063                                 } else
3064                                         service_search_main_pid(s);
3065
3066                                 service_enter_running(s, SERVICE_SUCCESS);
3067                                 break;
3068
3069                         case SERVICE_RELOAD:
3070                                 if (f == SERVICE_SUCCESS) {
3071                                         service_load_pid_file(s, true);
3072                                         service_search_main_pid(s);
3073                                 }
3074
3075                                 s->reload_result = f;
3076                                 service_enter_running(s, SERVICE_SUCCESS);
3077                                 break;
3078
3079                         case SERVICE_STOP:
3080                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3081                                 break;
3082
3083                         case SERVICE_STOP_SIGTERM:
3084                         case SERVICE_STOP_SIGKILL:
3085                                 if (main_pid_good(s) <= 0)
3086                                         service_enter_stop_post(s, f);
3087
3088                                 /* If there is still a service
3089                                  * process around, wait until
3090                                  * that one quit, too */
3091                                 break;
3092
3093                         case SERVICE_STOP_POST:
3094                         case SERVICE_FINAL_SIGTERM:
3095                         case SERVICE_FINAL_SIGKILL:
3096                                 service_enter_dead(s, f, true);
3097                                 break;
3098
3099                         default:
3100                                 assert_not_reached("Uh, control process died at wrong time.");
3101                         }
3102                 }
3103         }
3104
3105         /* Notify clients about changed exit status */
3106         unit_add_to_dbus_queue(u);
3107 }
3108
3109 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
3110         Service *s = SERVICE(u);
3111
3112         assert(s);
3113         assert(elapsed == 1);
3114
3115         if (w == &s->watchdog_watch) {
3116                 service_handle_watchdog(s);
3117                 return;
3118         }
3119
3120         assert(w == &s->timer_watch);
3121
3122         switch (s->state) {
3123
3124         case SERVICE_START_PRE:
3125         case SERVICE_START:
3126                 log_warning("%s operation timed out. Terminating.", u->id);
3127                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3128                 break;
3129
3130         case SERVICE_START_POST:
3131                 log_warning("%s operation timed out. Stopping.", u->id);
3132                 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3133                 break;
3134
3135         case SERVICE_RELOAD:
3136                 log_warning("%s operation timed out. Stopping.", u->id);
3137                 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3138                 service_enter_running(s, SERVICE_SUCCESS);
3139                 break;
3140
3141         case SERVICE_STOP:
3142                 log_warning("%s stopping timed out. Terminating.", u->id);
3143                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3144                 break;
3145
3146         case SERVICE_STOP_SIGTERM:
3147                 if (s->exec_context.send_sigkill) {
3148                         log_warning("%s stopping timed out. Killing.", u->id);
3149                         service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3150                 } else {
3151                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->id);
3152                         service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3153                 }
3154
3155                 break;
3156
3157         case SERVICE_STOP_SIGKILL:
3158                 /* Uh, we sent a SIGKILL and it is still not gone?
3159                  * Must be something we cannot kill, so let's just be
3160                  * weirded out and continue */
3161
3162                 log_warning("%s still around after SIGKILL. Ignoring.", u->id);
3163                 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3164                 break;
3165
3166         case SERVICE_STOP_POST:
3167                 log_warning("%s stopping timed out (2). Terminating.", u->id);
3168                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3169                 break;
3170
3171         case SERVICE_FINAL_SIGTERM:
3172                 if (s->exec_context.send_sigkill) {
3173                         log_warning("%s stopping timed out (2). Killing.", u->id);
3174                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3175                 } else {
3176                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->id);
3177                         service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3178                 }
3179
3180                 break;
3181
3182         case SERVICE_FINAL_SIGKILL:
3183                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->id);
3184                 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3185                 break;
3186
3187         case SERVICE_AUTO_RESTART:
3188                 log_info("%s holdoff time over, scheduling restart.", u->id);
3189                 service_enter_restart(s);
3190                 break;
3191
3192         default:
3193                 assert_not_reached("Timeout at wrong time.");
3194         }
3195 }
3196
3197 static void service_cgroup_notify_event(Unit *u) {
3198         Service *s = SERVICE(u);
3199
3200         assert(u);
3201
3202         log_debug("%s: cgroup is empty", u->id);
3203
3204         switch (s->state) {
3205
3206                 /* Waiting for SIGCHLD is usually more interesting,
3207                  * because it includes return codes/signals. Which is
3208                  * why we ignore the cgroup events for most cases,
3209                  * except when we don't know pid which to expect the
3210                  * SIGCHLD for. */
3211
3212         case SERVICE_START:
3213         case SERVICE_START_POST:
3214                 /* If we were hoping for the daemon to write its PID file,
3215                  * we can give up now. */
3216                 if (s->pid_file_pathspec) {
3217                         log_warning("%s never wrote its PID file. Failing.", UNIT(s)->id);
3218                         service_unwatch_pid_file(s);
3219                         if (s->state == SERVICE_START)
3220                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3221                         else
3222                                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3223                 }
3224                 break;
3225
3226         case SERVICE_RUNNING:
3227                 /* service_enter_running() will figure out what to do */
3228                 service_enter_running(s, SERVICE_SUCCESS);
3229                 break;
3230
3231         case SERVICE_STOP_SIGTERM:
3232         case SERVICE_STOP_SIGKILL:
3233
3234                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3235                         service_enter_stop_post(s, SERVICE_SUCCESS);
3236
3237                 break;
3238
3239         case SERVICE_FINAL_SIGTERM:
3240         case SERVICE_FINAL_SIGKILL:
3241                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3242                         service_enter_dead(s, SERVICE_SUCCESS, true);
3243
3244                 break;
3245
3246         default:
3247                 ;
3248         }
3249 }
3250
3251 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3252         Service *s = SERVICE(u);
3253         const char *e;
3254
3255         assert(u);
3256
3257         if (s->notify_access == NOTIFY_NONE) {
3258                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
3259                             u->id, (unsigned long) pid);
3260                 return;
3261         }
3262
3263         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3264                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3265                             u->id, (unsigned long) pid, (unsigned long) s->main_pid);
3266                 return;
3267         }
3268
3269         log_debug("%s: Got message", u->id);
3270
3271         /* Interpret MAINPID= */
3272         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3273             (s->state == SERVICE_START ||
3274              s->state == SERVICE_START_POST ||
3275              s->state == SERVICE_RUNNING ||
3276              s->state == SERVICE_RELOAD)) {
3277
3278                 if (parse_pid(e + 8, &pid) < 0)
3279                         log_warning("Failed to parse notification message %s", e);
3280                 else {
3281                         log_debug("%s: got %s", u->id, e);
3282                         service_set_main_pid(s, pid);
3283                 }
3284         }
3285
3286         /* Interpret READY= */
3287         if (s->type == SERVICE_NOTIFY &&
3288             s->state == SERVICE_START &&
3289             strv_find(tags, "READY=1")) {
3290                 log_debug("%s: got READY=1", u->id);
3291
3292                 service_enter_start_post(s);
3293         }
3294
3295         /* Interpret STATUS= */
3296         e = strv_find_prefix(tags, "STATUS=");
3297         if (e) {
3298                 char *t;
3299
3300                 if (e[7]) {
3301
3302                         if (!utf8_is_valid(e+7)) {
3303                                 log_warning("Status message in notification is not UTF-8 clean.");
3304                                 return;
3305                         }
3306
3307                         t = strdup(e+7);
3308                         if (!t) {
3309                                 log_error("Failed to allocate string.");
3310                                 return;
3311                         }
3312
3313                         log_debug("%s: got %s", u->id, e);
3314
3315                         free(s->status_text);
3316                         s->status_text = t;
3317                 } else {
3318                         free(s->status_text);
3319                         s->status_text = NULL;
3320                 }
3321
3322         }
3323         if (strv_find(tags, "WATCHDOG=1")) {
3324                 log_debug("%s: got WATCHDOG=1", u->id);
3325                 service_reset_watchdog(s);
3326         }
3327
3328         /* Notify clients about changed status or main pid */
3329         unit_add_to_dbus_queue(u);
3330 }
3331
3332 #ifdef HAVE_SYSV_COMPAT
3333
3334 #ifdef TARGET_SUSE
3335 static void sysv_facility_in_insserv_conf(Manager *mgr) {
3336         FILE *f=NULL;
3337         int r;
3338
3339         if (!(f = fopen("/etc/insserv.conf", "re"))) {
3340                 r = errno == ENOENT ? 0 : -errno;
3341                 goto finish;
3342         }
3343
3344         while (!feof(f)) {
3345                 char l[LINE_MAX], *t;
3346                 char **parsed = NULL;
3347
3348                 if (!fgets(l, sizeof(l), f)) {
3349                         if (feof(f))
3350                                 break;
3351
3352                         r = -errno;
3353                         log_error("Failed to read configuration file '/etc/insserv.conf': %s", strerror(-r));
3354                         goto finish;
3355                 }
3356
3357                 t = strstrip(l);
3358                 if (*t != '$' && *t != '<')
3359                         continue;
3360
3361                 parsed = strv_split(t,WHITESPACE);
3362                 /* we ignore <interactive>, not used, equivalent to X-Interactive */
3363                 if (parsed && !startswith_no_case (parsed[0], "<interactive>")) {
3364                         char *facility;
3365                         Unit *u;
3366                         if (sysv_translate_facility(parsed[0], NULL, &facility) < 0)
3367                                 continue;
3368                         if ((u = manager_get_unit(mgr, facility)) && (u->type == UNIT_TARGET)) {
3369                                 UnitDependency e;
3370                                 char *dep = NULL, *name, **j;
3371
3372                                 STRV_FOREACH (j, parsed+1) {
3373                                         if (*j[0]=='+') {
3374                                                 e = UNIT_WANTS;
3375                                                 name = *j+1;
3376                                         }
3377                                         else {
3378                                                 e = UNIT_REQUIRES;
3379                                                 name = *j;
3380                                         }
3381                                         if (sysv_translate_facility(name, NULL, &dep) < 0)
3382                                                 continue;
3383
3384                                         r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, e, dep, NULL, true);
3385                                         free(dep);
3386                                 }
3387                         }
3388                         free(facility);
3389                 }
3390                 strv_free(parsed);
3391         }
3392 finish:
3393         if (f)
3394                 fclose(f);
3395
3396 }
3397 #endif
3398
3399 static int service_enumerate(Manager *m) {
3400         char **p;
3401         unsigned i;
3402         DIR *d = NULL;
3403         char *path = NULL, *fpath = NULL, *name = NULL;
3404         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
3405         Unit *service;
3406         Iterator j;
3407         int r;
3408
3409         assert(m);
3410
3411         if (m->running_as != MANAGER_SYSTEM)
3412                 return 0;
3413
3414         zero(runlevel_services);
3415
3416         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3417                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3418                         struct dirent *de;
3419
3420                         free(path);
3421                         path = strjoin(*p, "/", rcnd_table[i].path, NULL);
3422                         if (!path) {
3423                                 r = -ENOMEM;
3424                                 goto finish;
3425                         }
3426
3427                         if (d)
3428                                 closedir(d);
3429
3430                         if (!(d = opendir(path))) {
3431                                 if (errno != ENOENT)
3432                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
3433
3434                                 continue;
3435                         }
3436
3437                         while ((de = readdir(d))) {
3438                                 int a, b;
3439
3440                                 if (ignore_file(de->d_name))
3441                                         continue;
3442
3443                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3444                                         continue;
3445
3446                                 if (strlen(de->d_name) < 4)
3447                                         continue;
3448
3449                                 a = undecchar(de->d_name[1]);
3450                                 b = undecchar(de->d_name[2]);
3451
3452                                 if (a < 0 || b < 0)
3453                                         continue;
3454
3455                                 free(fpath);
3456                                 fpath = strjoin(path, "/", de->d_name, NULL);
3457                                 if (!fpath) {
3458                                         r = -ENOMEM;
3459                                         goto finish;
3460                                 }
3461
3462                                 if (access(fpath, X_OK) < 0) {
3463
3464                                         if (errno != ENOENT)
3465                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3466
3467                                         continue;
3468                                 }
3469
3470                                 free(name);
3471                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
3472                                         r = -ENOMEM;
3473                                         goto finish;
3474                                 }
3475
3476                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
3477                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3478                                         continue;
3479                                 }
3480
3481                                 if (de->d_name[0] == 'S')  {
3482
3483                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
3484                                                 SERVICE(service)->sysv_start_priority_from_rcnd =
3485                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3486
3487                                                 SERVICE(service)->sysv_enabled = true;
3488                                         }
3489
3490                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3491                                                 goto finish;
3492
3493                                         if ((r = set_put(runlevel_services[i], service)) < 0)
3494                                                 goto finish;
3495
3496                                 } else if (de->d_name[0] == 'K' &&
3497                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
3498                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3499
3500                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3501                                                 goto finish;
3502
3503                                         if ((r = set_put(shutdown_services, service)) < 0)
3504                                                 goto finish;
3505                                 }
3506                         }
3507                 }
3508
3509         /* Now we loaded all stubs and are aware of the lowest
3510         start-up priority for all services, not let's actually load
3511         the services, this will also tell us which services are
3512         actually native now */
3513         manager_dispatch_load_queue(m);
3514
3515         /* If this is a native service, rely on native ways to pull in
3516          * a service, don't pull it in via sysv rcN.d links. */
3517         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3518                 SET_FOREACH(service, runlevel_services[i], j) {
3519                         service = unit_follow_merge(service);
3520
3521                         if (service->fragment_path)
3522                                 continue;
3523
3524                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3525                                 goto finish;
3526                 }
3527
3528         /* We honour K links only for halt/reboot. For the normal
3529          * runlevels we assume the stop jobs will be implicitly added
3530          * by the core logic. Also, we don't really distinguish here
3531          * between the runlevels 0 and 6 and just add them to the
3532          * special shutdown target. On SUSE the boot.d/ runlevel is
3533          * also used for shutdown, so we add links for that too to the
3534          * shutdown target.*/
3535         SET_FOREACH(service, shutdown_services, j) {
3536                 service = unit_follow_merge(service);
3537
3538                 if (service->fragment_path)
3539                         continue;
3540
3541                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3542                         goto finish;
3543         }
3544
3545         r = 0;
3546
3547 #ifdef TARGET_SUSE
3548         sysv_facility_in_insserv_conf (m);
3549 #endif
3550
3551 finish:
3552         free(path);
3553         free(fpath);
3554         free(name);
3555
3556         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3557                 set_free(runlevel_services[i]);
3558         set_free(shutdown_services);
3559
3560         if (d)
3561                 closedir(d);
3562
3563         return r;
3564 }
3565 #endif
3566
3567 static void service_bus_name_owner_change(
3568                 Unit *u,
3569                 const char *name,
3570                 const char *old_owner,
3571                 const char *new_owner) {
3572
3573         Service *s = SERVICE(u);
3574
3575         assert(s);
3576         assert(name);
3577
3578         assert(streq(s->bus_name, name));
3579         assert(old_owner || new_owner);
3580
3581         if (old_owner && new_owner)
3582                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->id, name, old_owner, new_owner);
3583         else if (old_owner)
3584                 log_debug("%s's D-Bus name %s no longer registered by %s", u->id, name, old_owner);
3585         else
3586                 log_debug("%s's D-Bus name %s now registered by %s", u->id, name, new_owner);
3587
3588         s->bus_name_good = !!new_owner;
3589
3590         if (s->type == SERVICE_DBUS) {
3591
3592                 /* service_enter_running() will figure out what to
3593                  * do */
3594                 if (s->state == SERVICE_RUNNING)
3595                         service_enter_running(s, SERVICE_SUCCESS);
3596                 else if (s->state == SERVICE_START && new_owner)
3597                         service_enter_start_post(s);
3598
3599         } else if (new_owner &&
3600                    s->main_pid <= 0 &&
3601                    (s->state == SERVICE_START ||
3602                     s->state == SERVICE_START_POST ||
3603                     s->state == SERVICE_RUNNING ||
3604                     s->state == SERVICE_RELOAD)) {
3605
3606                 /* Try to acquire PID from bus service */
3607                 log_debug("Trying to acquire PID from D-Bus name...");
3608
3609                 bus_query_pid(u->manager, name);
3610         }
3611 }
3612
3613 static void service_bus_query_pid_done(