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