chiark / gitweb /
service: add StartLimitInterval/StartLimitBurst/StartLimitAction
[elogind.git] / src / service.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4   This file is part of systemd.
5
6   Copyright 2010 Lennart Poettering
7
8   systemd is free software; you can redistribute it and/or modify it
9   under the terms of the GNU General Public License as published by
10   the Free Software Foundation; either version 2 of the License, or
11   (at your option) any later version.
12
13   systemd is distributed in the hope that it will be useful, but
14   WITHOUT ANY WARRANTY; without even the implied warranty of
15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16   General Public License for more details.
17
18   You should have received a copy of the GNU General Public License
19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include <errno.h>
23 #include <signal.h>
24 #include <dirent.h>
25 #include <unistd.h>
26 #include <sys/reboot.h>
27
28 #include "manager.h"
29 #include "unit.h"
30 #include "service.h"
31 #include "load-fragment.h"
32 #include "load-dropin.h"
33 #include "log.h"
34 #include "strv.h"
35 #include "unit-name.h"
36 #include "dbus-service.h"
37 #include "special.h"
38 #include "bus-errors.h"
39 #include "exit-status.h"
40 #include "def.h"
41 #include "util.h"
42
43 #ifdef HAVE_SYSV_COMPAT
44
45 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
46
47 typedef enum RunlevelType {
48         RUNLEVEL_UP,
49         RUNLEVEL_DOWN,
50         RUNLEVEL_SYSINIT
51 } RunlevelType;
52
53 static const struct {
54         const char *path;
55         const char *target;
56         const RunlevelType type;
57 } rcnd_table[] = {
58         /* Standard SysV runlevels for start-up */
59         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
60         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
61         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
62         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
63         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
64
65 #ifdef TARGET_SUSE
66         /* SUSE style boot.d */
67         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
68 #endif
69
70 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
71         /* Debian style rcS.d */
72         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
73 #endif
74
75         /* Standard SysV runlevels for shutdown */
76         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
77         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
78
79         /* Note that the order here matters, as we read the
80            directories in this order, and we want to make sure that
81            sysv_start_priority is known when we first load the
82            unit. And that value we only know from S links. Hence
83            UP/SYSINIT must be read before DOWN */
84 };
85
86 #define RUNLEVELS_UP "12345"
87 /* #define RUNLEVELS_DOWN "06" */
88 #define RUNLEVELS_BOOT "bBsS"
89 #endif
90
91 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
92         [SERVICE_DEAD] = UNIT_INACTIVE,
93         [SERVICE_START_PRE] = UNIT_ACTIVATING,
94         [SERVICE_START] = UNIT_ACTIVATING,
95         [SERVICE_START_POST] = UNIT_ACTIVATING,
96         [SERVICE_RUNNING] = UNIT_ACTIVE,
97         [SERVICE_EXITED] = UNIT_ACTIVE,
98         [SERVICE_RELOAD] = UNIT_RELOADING,
99         [SERVICE_STOP] = UNIT_DEACTIVATING,
100         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
101         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
102         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
103         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
104         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
105         [SERVICE_FAILED] = UNIT_FAILED,
106         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
107 };
108
109 static void service_init(Unit *u) {
110         Service *s = SERVICE(u);
111
112         assert(u);
113         assert(u->load_state == UNIT_STUB);
114
115         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
116         s->restart_usec = DEFAULT_RESTART_USEC;
117
118         s->watchdog_watch.type = WATCH_INVALID;
119
120         s->timer_watch.type = WATCH_INVALID;
121 #ifdef HAVE_SYSV_COMPAT
122         s->sysv_start_priority = -1;
123         s->sysv_start_priority_from_rcnd = -1;
124 #endif
125         s->socket_fd = -1;
126         s->guess_main_pid = true;
127
128         exec_context_init(&s->exec_context);
129
130         RATELIMIT_INIT(s->start_limit, 10*USEC_PER_SEC, 5);
131
132         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
133 }
134
135 static void service_unwatch_control_pid(Service *s) {
136         assert(s);
137
138         if (s->control_pid <= 0)
139                 return;
140
141         unit_unwatch_pid(UNIT(s), s->control_pid);
142         s->control_pid = 0;
143 }
144
145 static void service_unwatch_main_pid(Service *s) {
146         assert(s);
147
148         if (s->main_pid <= 0)
149                 return;
150
151         unit_unwatch_pid(UNIT(s), s->main_pid);
152         s->main_pid = 0;
153 }
154
155 static void service_unwatch_pid_file(Service *s) {
156         if (!s->pid_file_pathspec)
157                 return;
158
159         log_debug("Stopping watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
160         path_spec_unwatch(s->pid_file_pathspec, UNIT(s));
161         path_spec_done(s->pid_file_pathspec);
162         free(s->pid_file_pathspec);
163         s->pid_file_pathspec = NULL;
164 }
165
166 static int service_set_main_pid(Service *s, pid_t pid) {
167         pid_t ppid;
168
169         assert(s);
170
171         if (pid <= 1)
172                 return -EINVAL;
173
174         if (pid == getpid())
175                 return -EINVAL;
176
177         s->main_pid = pid;
178         s->main_pid_known = true;
179
180         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
181                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
182                             UNIT(s)->id, (unsigned long) pid);
183
184                 s->main_pid_alien = true;
185         } else
186                 s->main_pid_alien = false;
187
188         exec_status_start(&s->main_exec_status, pid);
189
190         return 0;
191 }
192
193 static void service_close_socket_fd(Service *s) {
194         assert(s);
195
196         if (s->socket_fd < 0)
197                 return;
198
199         close_nointr_nofail(s->socket_fd);
200         s->socket_fd = -1;
201 }
202
203 static void service_connection_unref(Service *s) {
204         assert(s);
205
206         if (!UNIT_DEREF(s->accept_socket))
207                 return;
208
209         socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
210         unit_ref_unset(&s->accept_socket);
211 }
212
213 static void service_stop_watchdog(Service *s) {
214         assert(s);
215
216         unit_unwatch_timer(UNIT(s), &s->watchdog_watch);
217         s->watchdog_timestamp.realtime = 0;
218         s->watchdog_timestamp.monotonic = 0;
219 }
220
221 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart);
222
223 static void service_handle_watchdog(Service *s) {
224         usec_t offset;
225         int r;
226
227         assert(s);
228
229         if (s->watchdog_usec == 0)
230                 return;
231
232         offset = now(CLOCK_MONOTONIC) - s->watchdog_timestamp.monotonic;
233         if (offset >= s->watchdog_usec) {
234                 log_error("%s watchdog timeout!", UNIT(s)->id);
235                 service_enter_dead(s, SERVICE_FAILURE_WATCHDOG, true);
236                 return;
237         }
238
239         r = unit_watch_timer(UNIT(s), s->watchdog_usec - offset, &s->watchdog_watch);
240         if (r < 0)
241                 log_warning("%s failed to install watchdog timer: %s", UNIT(s)->id, strerror(-r));
242 }
243
244 static void service_reset_watchdog(Service *s) {
245         assert(s);
246
247         dual_timestamp_get(&s->watchdog_timestamp);
248         service_handle_watchdog(s);
249 }
250
251 static void service_done(Unit *u) {
252         Service *s = SERVICE(u);
253
254         assert(s);
255
256         free(s->pid_file);
257         s->pid_file = NULL;
258
259 #ifdef HAVE_SYSV_COMPAT
260         free(s->sysv_path);
261         s->sysv_path = NULL;
262
263         free(s->sysv_runlevels);
264         s->sysv_runlevels = NULL;
265 #endif
266
267         free(s->status_text);
268         s->status_text = NULL;
269
270         exec_context_done(&s->exec_context);
271         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
272         s->control_command = NULL;
273         s->main_command = NULL;
274
275         /* This will leak a process, but at least no memory or any of
276          * our resources */
277         service_unwatch_main_pid(s);
278         service_unwatch_control_pid(s);
279         service_unwatch_pid_file(s);
280
281         if (s->bus_name)  {
282                 unit_unwatch_bus_name(u, s->bus_name);
283                 free(s->bus_name);
284                 s->bus_name = NULL;
285         }
286
287         service_close_socket_fd(s);
288         service_connection_unref(s);
289
290         unit_ref_unset(&s->accept_socket);
291
292         service_stop_watchdog(s);
293
294         unit_unwatch_timer(u, &s->timer_watch);
295 }
296
297 #ifdef HAVE_SYSV_COMPAT
298 static char *sysv_translate_name(const char *name) {
299         char *r;
300
301         if (!(r = new(char, strlen(name) + sizeof(".service"))))
302                 return NULL;
303
304 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
305         if (endswith(name, ".sh"))
306                 /* Drop Debian-style .sh suffix */
307                 strcpy(stpcpy(r, name) - 3, ".service");
308 #endif
309 #ifdef TARGET_SUSE
310         if (startswith(name, "boot."))
311                 /* Drop SuSE-style boot. prefix */
312                 strcpy(stpcpy(r, name + 5), ".service");
313 #endif
314 #ifdef TARGET_FRUGALWARE
315         if (startswith(name, "rc."))
316                 /* Drop Frugalware-style rc. prefix */
317                 strcpy(stpcpy(r, name + 3), ".service");
318 #endif
319         else
320                 /* Normal init scripts */
321                 strcpy(stpcpy(r, name), ".service");
322
323         return r;
324 }
325
326 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
327
328         /* We silently ignore the $ prefix here. According to the LSB
329          * spec it simply indicates whether something is a
330          * standardized name or a distribution-specific one. Since we
331          * just follow what already exists and do not introduce new
332          * uses or names we don't care who introduced a new name. */
333
334         static const char * const table[] = {
335                 /* LSB defined facilities */
336                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
337 #if defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
338 #else
339                 /* Due to unfortunate name selection in Mandriva,
340                  * $network is provided by network-up which is ordered
341                  * after network which actually starts interfaces.
342                  * To break the loop, just ignore it */
343                 "network",              SPECIAL_NETWORK_TARGET,
344 #endif
345                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
346                 "portmap",              SPECIAL_RPCBIND_TARGET,
347                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
348                 "syslog",               SPECIAL_SYSLOG_TARGET,
349                 "time",                 SPECIAL_TIME_SYNC_TARGET,
350
351                 /* common extensions */
352                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
353                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
354                 "null",                 NULL,
355
356 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
357                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
358 #endif
359
360 #ifdef TARGET_FEDORA
361                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
362                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
363                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
364 #endif
365
366 #ifdef TARGET_SUSE
367                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
368 #endif
369         };
370
371         unsigned i;
372         char *r;
373         const char *n;
374
375         assert(name);
376         assert(_r);
377
378         n = *name == '$' ? name + 1 : name;
379
380         for (i = 0; i < ELEMENTSOF(table); i += 2) {
381
382                 if (!streq(table[i], n))
383                         continue;
384
385                 if (!table[i+1])
386                         return 0;
387
388                 if (!(r = strdup(table[i+1])))
389                         return -ENOMEM;
390
391                 goto finish;
392         }
393
394         /* If we don't know this name, fallback heuristics to figure
395          * out whether something is a target or a service alias. */
396
397         if (*name == '$') {
398                 if (!unit_prefix_is_valid(n))
399                         return -EINVAL;
400
401                 /* Facilities starting with $ are most likely targets */
402                 r = unit_name_build(n, NULL, ".target");
403         } else if (filename && streq(name, filename))
404                 /* Names equaling the file name of the services are redundant */
405                 return 0;
406         else
407                 /* Everything else we assume to be normal service names */
408                 r = sysv_translate_name(n);
409
410         if (!r)
411                 return -ENOMEM;
412
413 finish:
414         *_r = r;
415
416         return 1;
417 }
418
419 static int sysv_fix_order(Service *s) {
420         Unit *other;
421         int r;
422
423         assert(s);
424
425         if (s->sysv_start_priority < 0)
426                 return 0;
427
428         /* For each pair of services where at least one lacks a LSB
429          * header, we use the start priority value to order things. */
430
431         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
432                 Service *t;
433                 UnitDependency d;
434                 bool special_s, special_t;
435
436                 t = SERVICE(other);
437
438                 if (s == t)
439                         continue;
440
441                 if (UNIT(t)->load_state != UNIT_LOADED)
442                         continue;
443
444                 if (t->sysv_start_priority < 0)
445                         continue;
446
447                 /* If both units have modern headers we don't care
448                  * about the priorities */
449                 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
450                     (UNIT(t)->fragment_path || t->sysv_has_lsb))
451                         continue;
452
453                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
454                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
455
456                 if (special_t && !special_s)
457                         d = UNIT_AFTER;
458                 else if (special_s && !special_t)
459                         d = UNIT_BEFORE;
460                 else if (t->sysv_start_priority < s->sysv_start_priority)
461                         d = UNIT_AFTER;
462                 else if (t->sysv_start_priority > s->sysv_start_priority)
463                         d = UNIT_BEFORE;
464                 else
465                         continue;
466
467                 /* FIXME: Maybe we should compare the name here lexicographically? */
468
469                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
470                         return r;
471         }
472
473         return 0;
474 }
475
476 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
477         ExecCommand *c;
478
479         if (!(c = new0(ExecCommand, 1)))
480                 return NULL;
481
482         if (!(c->path = strdup(path))) {
483                 free(c);
484                 return NULL;
485         }
486
487         if (!(c->argv = strv_new(path, arg1, NULL))) {
488                 free(c->path);
489                 free(c);
490                 return NULL;
491         }
492
493         return c;
494 }
495
496 static int sysv_exec_commands(Service *s) {
497         ExecCommand *c;
498
499         assert(s);
500         assert(s->sysv_path);
501
502         if (!(c = exec_command_new(s->sysv_path, "start")))
503                 return -ENOMEM;
504         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
505
506         if (!(c = exec_command_new(s->sysv_path, "stop")))
507                 return -ENOMEM;
508         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
509
510         if (!(c = exec_command_new(s->sysv_path, "reload")))
511                 return -ENOMEM;
512         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
513
514         return 0;
515 }
516
517 static int service_load_sysv_path(Service *s, const char *path) {
518         FILE *f;
519         Unit *u;
520         unsigned line = 0;
521         int r;
522         enum {
523                 NORMAL,
524                 DESCRIPTION,
525                 LSB,
526                 LSB_DESCRIPTION
527         } state = NORMAL;
528         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
529         struct stat st;
530
531         assert(s);
532         assert(path);
533
534         u = UNIT(s);
535
536         if (!(f = fopen(path, "re"))) {
537                 r = errno == ENOENT ? 0 : -errno;
538                 goto finish;
539         }
540
541         zero(st);
542         if (fstat(fileno(f), &st) < 0) {
543                 r = -errno;
544                 goto finish;
545         }
546
547         free(s->sysv_path);
548         if (!(s->sysv_path = strdup(path))) {
549                 r = -ENOMEM;
550                 goto finish;
551         }
552
553         s->sysv_mtime = timespec_load(&st.st_mtim);
554
555         if (null_or_empty(&st)) {
556                 u->load_state = UNIT_MASKED;
557                 r = 0;
558                 goto finish;
559         }
560
561         while (!feof(f)) {
562                 char l[LINE_MAX], *t;
563
564                 if (!fgets(l, sizeof(l), f)) {
565                         if (feof(f))
566                                 break;
567
568                         r = -errno;
569                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
570                         goto finish;
571                 }
572
573                 line++;
574
575                 t = strstrip(l);
576                 if (*t != '#')
577                         continue;
578
579                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
580                         state = LSB;
581                         s->sysv_has_lsb = true;
582                         continue;
583                 }
584
585                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
586                         state = NORMAL;
587                         continue;
588                 }
589
590                 t++;
591                 t += strspn(t, WHITESPACE);
592
593                 if (state == NORMAL) {
594
595                         /* Try to parse Red Hat style chkconfig headers */
596
597                         if (startswith_no_case(t, "chkconfig:")) {
598                                 int start_priority;
599                                 char runlevels[16], *k;
600
601                                 state = NORMAL;
602
603                                 if (sscanf(t+10, "%15s %i %*i",
604                                            runlevels,
605                                            &start_priority) != 2) {
606
607                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
608                                         continue;
609                                 }
610
611                                 /* A start priority gathered from the
612                                  * symlink farms is preferred over the
613                                  * data from the LSB header. */
614                                 if (start_priority < 0 || start_priority > 99)
615                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
616                                 else
617                                         s->sysv_start_priority = start_priority;
618
619                                 char_array_0(runlevels);
620                                 k = delete_chars(runlevels, WHITESPACE "-");
621
622                                 if (k[0]) {
623                                         char *d;
624
625                                         if (!(d = strdup(k))) {
626                                                 r = -ENOMEM;
627                                                 goto finish;
628                                         }
629
630                                         free(s->sysv_runlevels);
631                                         s->sysv_runlevels = d;
632                                 }
633
634                         } else if (startswith_no_case(t, "description:")) {
635
636                                 size_t k = strlen(t);
637                                 char *d;
638                                 const char *j;
639
640                                 if (t[k-1] == '\\') {
641                                         state = DESCRIPTION;
642                                         t[k-1] = 0;
643                                 }
644
645                                 if ((j = strstrip(t+12)) && *j) {
646                                         if (!(d = strdup(j))) {
647                                                 r = -ENOMEM;
648                                                 goto finish;
649                                         }
650                                 } else
651                                         d = NULL;
652
653                                 free(chkconfig_description);
654                                 chkconfig_description = d;
655
656                         } else if (startswith_no_case(t, "pidfile:")) {
657
658                                 char *fn;
659
660                                 state = NORMAL;
661
662                                 fn = strstrip(t+8);
663                                 if (!path_is_absolute(fn)) {
664                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
665                                         continue;
666                                 }
667
668                                 if (!(fn = strdup(fn))) {
669                                         r = -ENOMEM;
670                                         goto finish;
671                                 }
672
673                                 free(s->pid_file);
674                                 s->pid_file = fn;
675                         }
676
677                 } else if (state == DESCRIPTION) {
678
679                         /* Try to parse Red Hat style description
680                          * continuation */
681
682                         size_t k = strlen(t);
683                         char *j;
684
685                         if (t[k-1] == '\\')
686                                 t[k-1] = 0;
687                         else
688                                 state = NORMAL;
689
690                         if ((j = strstrip(t)) && *j) {
691                                 char *d = NULL;
692
693                                 if (chkconfig_description)
694                                         d = join(chkconfig_description, " ", j, NULL);
695                                 else
696                                         d = strdup(j);
697
698                                 if (!d) {
699                                         r = -ENOMEM;
700                                         goto finish;
701                                 }
702
703                                 free(chkconfig_description);
704                                 chkconfig_description = d;
705                         }
706
707                 } else if (state == LSB || state == LSB_DESCRIPTION) {
708
709                         if (startswith_no_case(t, "Provides:")) {
710                                 char *i, *w;
711                                 size_t z;
712
713                                 state = LSB;
714
715                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
716                                         char *n, *m;
717
718                                         if (!(n = strndup(w, z))) {
719                                                 r = -ENOMEM;
720                                                 goto finish;
721                                         }
722
723                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
724                                         free(n);
725
726                                         if (r < 0)
727                                                 goto finish;
728
729                                         if (r == 0)
730                                                 continue;
731
732                                         if (unit_name_to_type(m) == UNIT_SERVICE)
733                                                 r = unit_add_name(u, m);
734                                         else
735                                                 /* NB: SysV targets
736                                                  * which are provided
737                                                  * by a service are
738                                                  * pulled in by the
739                                                  * services, as an
740                                                  * indication that the
741                                                  * generic service is
742                                                  * now available. This
743                                                  * is strictly
744                                                  * one-way. The
745                                                  * targets do NOT pull
746                                                  * in the SysV
747                                                  * services! */
748                                                 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
749
750                                         if (r < 0)
751                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
752
753                                         free(m);
754                                 }
755
756                         } else if (startswith_no_case(t, "Required-Start:") ||
757                                    startswith_no_case(t, "Should-Start:") ||
758                                    startswith_no_case(t, "X-Start-Before:") ||
759                                    startswith_no_case(t, "X-Start-After:")) {
760                                 char *i, *w;
761                                 size_t z;
762
763                                 state = LSB;
764
765                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
766                                         char *n, *m;
767
768                                         if (!(n = strndup(w, z))) {
769                                                 r = -ENOMEM;
770                                                 goto finish;
771                                         }
772
773                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
774
775                                         if (r < 0) {
776                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
777                                                 free(n);
778                                                 continue;
779                                         }
780
781                                         free(n);
782
783                                         if (r == 0)
784                                                 continue;
785
786                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
787
788                                         if (r < 0)
789                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
790
791                                         free(m);
792                                 }
793                         } else if (startswith_no_case(t, "Default-Start:")) {
794                                 char *k, *d;
795
796                                 state = LSB;
797
798                                 k = delete_chars(t+14, WHITESPACE "-");
799
800                                 if (k[0] != 0) {
801                                         if (!(d = strdup(k))) {
802                                                 r = -ENOMEM;
803                                                 goto finish;
804                                         }
805
806                                         free(s->sysv_runlevels);
807                                         s->sysv_runlevels = d;
808                                 }
809
810                         } else if (startswith_no_case(t, "Description:")) {
811                                 char *d, *j;
812
813                                 state = LSB_DESCRIPTION;
814
815                                 if ((j = strstrip(t+12)) && *j) {
816                                         if (!(d = strdup(j))) {
817                                                 r = -ENOMEM;
818                                                 goto finish;
819                                         }
820                                 } else
821                                         d = NULL;
822
823                                 free(long_description);
824                                 long_description = d;
825
826                         } else if (startswith_no_case(t, "Short-Description:")) {
827                                 char *d, *j;
828
829                                 state = LSB;
830
831                                 if ((j = strstrip(t+18)) && *j) {
832                                         if (!(d = strdup(j))) {
833                                                 r = -ENOMEM;
834                                                 goto finish;
835                                         }
836                                 } else
837                                         d = NULL;
838
839                                 free(short_description);
840                                 short_description = d;
841
842                         } else if (state == LSB_DESCRIPTION) {
843
844                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
845                                         char *j;
846
847                                         if ((j = strstrip(t)) && *j) {
848                                                 char *d = NULL;
849
850                                                 if (long_description)
851                                                         d = join(long_description, " ", t, NULL);
852                                                 else
853                                                         d = strdup(j);
854
855                                                 if (!d) {
856                                                         r = -ENOMEM;
857                                                         goto finish;
858                                                 }
859
860                                                 free(long_description);
861                                                 long_description = d;
862                                         }
863
864                                 } else
865                                         state = LSB;
866                         }
867                 }
868         }
869
870         if ((r = sysv_exec_commands(s)) < 0)
871                 goto finish;
872         if (s->sysv_runlevels &&
873             chars_intersect(RUNLEVELS_BOOT, s->sysv_runlevels) &&
874             chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
875                 /* Service has both boot and "up" runlevels
876                    configured.  Kill the "up" ones. */
877                 delete_chars(s->sysv_runlevels, RUNLEVELS_UP);
878         }
879
880         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
881                 /* If there a runlevels configured for this service
882                  * but none of the standard ones, then we assume this
883                  * is some special kind of service (which might be
884                  * needed for early boot) and don't create any links
885                  * to it. */
886
887                 UNIT(s)->default_dependencies = false;
888
889                 /* Don't timeout special services during boot (like fsck) */
890                 s->timeout_usec = 0;
891         } else
892                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
893
894         /* Special setting for all SysV services */
895         s->type = SERVICE_FORKING;
896         s->remain_after_exit = !s->pid_file;
897         s->guess_main_pid = false;
898         s->restart = SERVICE_RESTART_NO;
899         s->exec_context.ignore_sigpipe = false;
900
901         if (UNIT(s)->manager->sysv_console)
902                 s->exec_context.std_output = EXEC_OUTPUT_JOURNAL_AND_CONSOLE;
903
904         s->exec_context.kill_mode = KILL_PROCESS;
905
906         /* We use the long description only if
907          * no short description is set. */
908
909         if (short_description)
910                 description = short_description;
911         else if (chkconfig_description)
912                 description = chkconfig_description;
913         else if (long_description)
914                 description = long_description;
915         else
916                 description = NULL;
917
918         if (description) {
919                 char *d;
920
921                 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
922                         r = -ENOMEM;
923                         goto finish;
924                 }
925
926                 u->description = d;
927         }
928
929         /* The priority that has been set in /etc/rcN.d/ hierarchies
930          * takes precedence over what is stored as default in the LSB
931          * header */
932         if (s->sysv_start_priority_from_rcnd >= 0)
933                 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
934
935         u->load_state = UNIT_LOADED;
936         r = 0;
937
938 finish:
939
940         if (f)
941                 fclose(f);
942
943         free(short_description);
944         free(long_description);
945         free(chkconfig_description);
946
947         return r;
948 }
949
950 static int service_load_sysv_name(Service *s, const char *name) {
951         char **p;
952
953         assert(s);
954         assert(name);
955
956         /* For SysV services we strip the boot.*, rc.* and *.sh
957          * prefixes/suffixes. */
958 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
959         if (endswith(name, ".sh.service"))
960                 return -ENOENT;
961 #endif
962
963 #ifdef TARGET_SUSE
964         if (startswith(name, "boot."))
965                 return -ENOENT;
966 #endif
967
968 #ifdef TARGET_FRUGALWARE
969         if (startswith(name, "rc."))
970                 return -ENOENT;
971 #endif
972
973         STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
974                 char *path;
975                 int r;
976
977                 path = join(*p, "/", name, NULL);
978                 if (!path)
979                         return -ENOMEM;
980
981                 assert(endswith(path, ".service"));
982                 path[strlen(path)-8] = 0;
983
984                 r = service_load_sysv_path(s, path);
985
986 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
987                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
988                         /* Try Debian style *.sh source'able init scripts */
989                         strcat(path, ".sh");
990                         r = service_load_sysv_path(s, path);
991                 }
992 #endif
993                 free(path);
994
995 #ifdef TARGET_SUSE
996                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
997                         /* Try SUSE style boot.* init scripts */
998
999                         path = join(*p, "/boot.", name, NULL);
1000                         if (!path)
1001                                 return -ENOMEM;
1002
1003                         /* Drop .service suffix */
1004                         path[strlen(path)-8] = 0;
1005                         r = service_load_sysv_path(s, path);
1006                         free(path);
1007                 }
1008 #endif
1009
1010 #ifdef TARGET_FRUGALWARE
1011                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1012                         /* Try Frugalware style rc.* init scripts */
1013
1014                         path = join(*p, "/rc.", name, NULL);
1015                         if (!path)
1016                                 return -ENOMEM;
1017
1018                         /* Drop .service suffix */
1019                         path[strlen(path)-8] = 0;
1020                         r = service_load_sysv_path(s, path);
1021                         free(path);
1022                 }
1023 #endif
1024
1025                 if (r < 0)
1026                         return r;
1027
1028                 if ((UNIT(s)->load_state != UNIT_STUB))
1029                         break;
1030         }
1031
1032         return 0;
1033 }
1034
1035 static int service_load_sysv(Service *s) {
1036         const char *t;
1037         Iterator i;
1038         int r;
1039
1040         assert(s);
1041
1042         /* Load service data from SysV init scripts, preferably with
1043          * LSB headers ... */
1044
1045         if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1046                 return 0;
1047
1048         if ((t = UNIT(s)->id))
1049                 if ((r = service_load_sysv_name(s, t)) < 0)
1050                         return r;
1051
1052         if (UNIT(s)->load_state == UNIT_STUB)
1053                 SET_FOREACH(t, UNIT(s)->names, i) {
1054                         if (t == UNIT(s)->id)
1055                                 continue;
1056
1057                         if ((r = service_load_sysv_name(s, t)) < 0)
1058                                 return r;
1059
1060                         if (UNIT(s)->load_state != UNIT_STUB)
1061                                 break;
1062                 }
1063
1064         return 0;
1065 }
1066 #endif
1067
1068 static int fsck_fix_order(Service *s) {
1069         Unit *other;
1070         int r;
1071
1072         assert(s);
1073
1074         if (s->fsck_passno <= 0)
1075                 return 0;
1076
1077         /* For each pair of services where both have an fsck priority
1078          * we order things based on it. */
1079
1080         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
1081                 Service *t;
1082                 UnitDependency d;
1083
1084                 t = SERVICE(other);
1085
1086                 if (s == t)
1087                         continue;
1088
1089                 if (UNIT(t)->load_state != UNIT_LOADED)
1090                         continue;
1091
1092                 if (t->fsck_passno <= 0)
1093                         continue;
1094
1095                 if (t->fsck_passno < s->fsck_passno)
1096                         d = UNIT_AFTER;
1097                 else if (t->fsck_passno > s->fsck_passno)
1098                         d = UNIT_BEFORE;
1099                 else
1100                         continue;
1101
1102                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1103                         return r;
1104         }
1105
1106         return 0;
1107 }
1108
1109 static int service_verify(Service *s) {
1110         assert(s);
1111
1112         if (UNIT(s)->load_state != UNIT_LOADED)
1113                 return 0;
1114
1115         if (!s->exec_command[SERVICE_EXEC_START]) {
1116                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1117                 return -EINVAL;
1118         }
1119
1120         if (s->type != SERVICE_ONESHOT &&
1121             s->exec_command[SERVICE_EXEC_START]->command_next) {
1122                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1123                 return -EINVAL;
1124         }
1125
1126         if (s->type == SERVICE_ONESHOT &&
1127             s->exec_command[SERVICE_EXEC_RELOAD]) {
1128                 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1129                 return -EINVAL;
1130         }
1131
1132         if (s->type == SERVICE_DBUS && !s->bus_name) {
1133                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1134                 return -EINVAL;
1135         }
1136
1137         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1138                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
1139                 return -EINVAL;
1140         }
1141
1142         return 0;
1143 }
1144
1145 static int service_add_default_dependencies(Service *s) {
1146         int r;
1147
1148         assert(s);
1149
1150         /* Add a number of automatic dependencies useful for the
1151          * majority of services. */
1152
1153         /* First, pull in base system */
1154         if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
1155
1156                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1157                         return r;
1158
1159         } else if (UNIT(s)->manager->running_as == MANAGER_USER) {
1160
1161                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1162                         return r;
1163         }
1164
1165         /* Second, activate normal shutdown */
1166         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1167 }
1168
1169 static void service_fix_output(Service *s) {
1170         assert(s);
1171
1172         /* If nothing has been explicitly configured, patch default
1173          * output in. If input is socket/tty we avoid this however,
1174          * since in that case we want output to default to the same
1175          * place as we read input from. */
1176
1177         if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1178             s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1179             s->exec_context.std_input == EXEC_INPUT_NULL)
1180                 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1181
1182         if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1183             s->exec_context.std_input == EXEC_INPUT_NULL)
1184                 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1185 }
1186
1187 static int service_load(Unit *u) {
1188         int r;
1189         Service *s = SERVICE(u);
1190
1191         assert(s);
1192
1193         /* Load a .service file */
1194         if ((r = unit_load_fragment(u)) < 0)
1195                 return r;
1196
1197 #ifdef HAVE_SYSV_COMPAT
1198         /* Load a classic init script as a fallback, if we couldn't find anything */
1199         if (u->load_state == UNIT_STUB)
1200                 if ((r = service_load_sysv(s)) < 0)
1201                         return r;
1202 #endif
1203
1204         /* Still nothing found? Then let's give up */
1205         if (u->load_state == UNIT_STUB)
1206                 return -ENOENT;
1207
1208         /* We were able to load something, then let's add in the
1209          * dropin directories. */
1210         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1211                 return r;
1212
1213         /* This is a new unit? Then let's add in some extras */
1214         if (u->load_state == UNIT_LOADED) {
1215                 service_fix_output(s);
1216
1217                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1218                         return r;
1219
1220                 if ((r = unit_add_default_cgroups(u)) < 0)
1221                         return r;
1222
1223 #ifdef HAVE_SYSV_COMPAT
1224                 if ((r = sysv_fix_order(s)) < 0)
1225                         return r;
1226 #endif
1227
1228                 if ((r = fsck_fix_order(s)) < 0)
1229                         return r;
1230
1231                 if (s->bus_name)
1232                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1233                                 return r;
1234
1235                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1236                         s->notify_access = NOTIFY_MAIN;
1237
1238                 if (s->type == SERVICE_DBUS || s->bus_name)
1239                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true)) < 0)
1240                                 return r;
1241
1242                 if (UNIT(s)->default_dependencies)
1243                         if ((r = service_add_default_dependencies(s)) < 0)
1244                                 return r;
1245         }
1246
1247         return service_verify(s);
1248 }
1249
1250 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1251
1252         ServiceExecCommand c;
1253         Service *s = SERVICE(u);
1254         const char *prefix2;
1255         char *p2;
1256
1257         assert(s);
1258
1259         p2 = strappend(prefix, "\t");
1260         prefix2 = p2 ? p2 : prefix;
1261
1262         fprintf(f,
1263                 "%sService State: %s\n"
1264                 "%sResult: %s\n"
1265                 "%sReload Result: %s\n"
1266                 "%sPermissionsStartOnly: %s\n"
1267                 "%sRootDirectoryStartOnly: %s\n"
1268                 "%sRemainAfterExit: %s\n"
1269                 "%sGuessMainPID: %s\n"
1270                 "%sType: %s\n"
1271                 "%sRestart: %s\n"
1272                 "%sNotifyAccess: %s\n",
1273                 prefix, service_state_to_string(s->state),
1274                 prefix, service_result_to_string(s->result),
1275                 prefix, service_result_to_string(s->reload_result),
1276                 prefix, yes_no(s->permissions_start_only),
1277                 prefix, yes_no(s->root_directory_start_only),
1278                 prefix, yes_no(s->remain_after_exit),
1279                 prefix, yes_no(s->guess_main_pid),
1280                 prefix, service_type_to_string(s->type),
1281                 prefix, service_restart_to_string(s->restart),
1282                 prefix, notify_access_to_string(s->notify_access));
1283
1284         if (s->control_pid > 0)
1285                 fprintf(f,
1286                         "%sControl PID: %lu\n",
1287                         prefix, (unsigned long) s->control_pid);
1288
1289         if (s->main_pid > 0)
1290                 fprintf(f,
1291                         "%sMain PID: %lu\n"
1292                         "%sMain PID Known: %s\n"
1293                         "%sMain PID Alien: %s\n",
1294                         prefix, (unsigned long) s->main_pid,
1295                         prefix, yes_no(s->main_pid_known),
1296                         prefix, yes_no(s->main_pid_alien));
1297
1298         if (s->pid_file)
1299                 fprintf(f,
1300                         "%sPIDFile: %s\n",
1301                         prefix, s->pid_file);
1302
1303         if (s->bus_name)
1304                 fprintf(f,
1305                         "%sBusName: %s\n"
1306                         "%sBus Name Good: %s\n",
1307                         prefix, s->bus_name,
1308                         prefix, yes_no(s->bus_name_good));
1309
1310         exec_context_dump(&s->exec_context, f, prefix);
1311
1312         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1313
1314                 if (!s->exec_command[c])
1315                         continue;
1316
1317                 fprintf(f, "%s-> %s:\n",
1318                         prefix, service_exec_command_to_string(c));
1319
1320                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1321         }
1322
1323 #ifdef HAVE_SYSV_COMPAT
1324         if (s->sysv_path)
1325                 fprintf(f,
1326                         "%sSysV Init Script Path: %s\n"
1327                         "%sSysV Init Script has LSB Header: %s\n"
1328                         "%sSysVEnabled: %s\n",
1329                         prefix, s->sysv_path,
1330                         prefix, yes_no(s->sysv_has_lsb),
1331                         prefix, yes_no(s->sysv_enabled));
1332
1333         if (s->sysv_start_priority >= 0)
1334                 fprintf(f,
1335                         "%sSysVStartPriority: %i\n",
1336                         prefix, s->sysv_start_priority);
1337
1338         if (s->sysv_runlevels)
1339                 fprintf(f, "%sSysVRunLevels: %s\n",
1340                         prefix, s->sysv_runlevels);
1341 #endif
1342
1343         if (s->fsck_passno > 0)
1344                 fprintf(f,
1345                         "%sFsckPassNo: %i\n",
1346                         prefix, s->fsck_passno);
1347
1348         if (s->status_text)
1349                 fprintf(f, "%sStatus Text: %s\n",
1350                         prefix, s->status_text);
1351
1352         free(p2);
1353 }
1354
1355 static int service_load_pid_file(Service *s, bool may_warn) {
1356         char *k;
1357         int r;
1358         pid_t pid;
1359
1360         assert(s);
1361
1362         if (!s->pid_file)
1363                 return -ENOENT;
1364
1365         if ((r = read_one_line_file(s->pid_file, &k)) < 0) {
1366                 if (may_warn)
1367                         log_info("PID file %s not readable (yet?) after %s.",
1368                                  s->pid_file, service_state_to_string(s->state));
1369                 return r;
1370         }
1371
1372         r = parse_pid(k, &pid);
1373         free(k);
1374
1375         if (r < 0)
1376                 return r;
1377
1378         if (kill(pid, 0) < 0 && errno != EPERM) {
1379                 if (may_warn)
1380                         log_info("PID %lu read from file %s does not exist.",
1381                                  (unsigned long) pid, s->pid_file);
1382                 return -ESRCH;
1383         }
1384
1385         if (s->main_pid_known) {
1386                 if (pid == s->main_pid)
1387                         return 0;
1388
1389                 log_debug("Main PID changing: %lu -> %lu",
1390                           (unsigned long) s->main_pid, (unsigned long) pid);
1391                 service_unwatch_main_pid(s);
1392                 s->main_pid_known = false;
1393         } else
1394                 log_debug("Main PID loaded: %lu", (unsigned long) pid);
1395
1396         if ((r = service_set_main_pid(s, pid)) < 0)
1397                 return r;
1398
1399         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1400                 /* FIXME: we need to do something here */
1401                 return r;
1402
1403         return 0;
1404 }
1405
1406 static int service_search_main_pid(Service *s) {
1407         pid_t pid;
1408         int r;
1409
1410         assert(s);
1411
1412         /* If we know it anyway, don't ever fallback to unreliable
1413          * heuristics */
1414         if (s->main_pid_known)
1415                 return 0;
1416
1417         if (!s->guess_main_pid)
1418                 return 0;
1419
1420         assert(s->main_pid <= 0);
1421
1422         if ((pid = cgroup_bonding_search_main_pid_list(UNIT(s)->cgroup_bondings)) <= 0)
1423                 return -ENOENT;
1424
1425         log_debug("Main PID guessed: %lu", (unsigned long) pid);
1426         if ((r = service_set_main_pid(s, pid)) < 0)
1427                 return r;
1428
1429         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1430                 /* FIXME: we need to do something here */
1431                 return r;
1432
1433         return 0;
1434 }
1435
1436 static void service_notify_sockets_dead(Service *s) {
1437         Iterator i;
1438         Unit *u;
1439
1440         assert(s);
1441
1442         /* Notifies all our sockets when we die */
1443
1444         if (s->socket_fd >= 0)
1445                 return;
1446
1447         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i)
1448                 if (u->type == UNIT_SOCKET)
1449                         socket_notify_service_dead(SOCKET(u));
1450
1451         return;
1452 }
1453
1454 static void service_set_state(Service *s, ServiceState state) {
1455         ServiceState old_state;
1456         assert(s);
1457
1458         old_state = s->state;
1459         s->state = state;
1460
1461         service_unwatch_pid_file(s);
1462
1463         if (state != SERVICE_START_PRE &&
1464             state != SERVICE_START &&
1465             state != SERVICE_START_POST &&
1466             state != SERVICE_RELOAD &&
1467             state != SERVICE_STOP &&
1468             state != SERVICE_STOP_SIGTERM &&
1469             state != SERVICE_STOP_SIGKILL &&
1470             state != SERVICE_STOP_POST &&
1471             state != SERVICE_FINAL_SIGTERM &&
1472             state != SERVICE_FINAL_SIGKILL &&
1473             state != SERVICE_AUTO_RESTART)
1474                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1475
1476         if (state != SERVICE_START &&
1477             state != SERVICE_START_POST &&
1478             state != SERVICE_RUNNING &&
1479             state != SERVICE_RELOAD &&
1480             state != SERVICE_STOP &&
1481             state != SERVICE_STOP_SIGTERM &&
1482             state != SERVICE_STOP_SIGKILL) {
1483                 service_unwatch_main_pid(s);
1484                 s->main_command = NULL;
1485         }
1486
1487         if (state != SERVICE_START_PRE &&
1488             state != SERVICE_START &&
1489             state != SERVICE_START_POST &&
1490             state != SERVICE_RELOAD &&
1491             state != SERVICE_STOP &&
1492             state != SERVICE_STOP_SIGTERM &&
1493             state != SERVICE_STOP_SIGKILL &&
1494             state != SERVICE_STOP_POST &&
1495             state != SERVICE_FINAL_SIGTERM &&
1496             state != SERVICE_FINAL_SIGKILL) {
1497                 service_unwatch_control_pid(s);
1498                 s->control_command = NULL;
1499                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1500         }
1501
1502         if (state == SERVICE_DEAD ||
1503             state == SERVICE_STOP ||
1504             state == SERVICE_STOP_SIGTERM ||
1505             state == SERVICE_STOP_SIGKILL ||
1506             state == SERVICE_STOP_POST ||
1507             state == SERVICE_FINAL_SIGTERM ||
1508             state == SERVICE_FINAL_SIGKILL ||
1509             state == SERVICE_FAILED ||
1510             state == SERVICE_AUTO_RESTART)
1511                 service_notify_sockets_dead(s);
1512
1513         if (state != SERVICE_START_PRE &&
1514             state != SERVICE_START &&
1515             state != SERVICE_START_POST &&
1516             state != SERVICE_RUNNING &&
1517             state != SERVICE_RELOAD &&
1518             state != SERVICE_STOP &&
1519             state != SERVICE_STOP_SIGTERM &&
1520             state != SERVICE_STOP_SIGKILL &&
1521             state != SERVICE_STOP_POST &&
1522             state != SERVICE_FINAL_SIGTERM &&
1523             state != SERVICE_FINAL_SIGKILL &&
1524             !(state == SERVICE_DEAD && UNIT(s)->job)) {
1525                 service_close_socket_fd(s);
1526                 service_connection_unref(s);
1527         }
1528
1529         if (state == SERVICE_STOP)
1530                 service_stop_watchdog(s);
1531
1532         /* For the inactive states unit_notify() will trim the cgroup,
1533          * but for exit we have to do that ourselves... */
1534         if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1535                 cgroup_bonding_trim_list(UNIT(s)->cgroup_bondings, true);
1536
1537         if (old_state != state)
1538                 log_debug("%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
1539
1540         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], s->reload_result == SERVICE_SUCCESS);
1541         s->reload_result = SERVICE_SUCCESS;
1542 }
1543
1544 static int service_coldplug(Unit *u) {
1545         Service *s = SERVICE(u);
1546         int r;
1547
1548         assert(s);
1549         assert(s->state == SERVICE_DEAD);
1550
1551         if (s->deserialized_state != s->state) {
1552
1553                 if (s->deserialized_state == SERVICE_START_PRE ||
1554                     s->deserialized_state == SERVICE_START ||
1555                     s->deserialized_state == SERVICE_START_POST ||
1556                     s->deserialized_state == SERVICE_RELOAD ||
1557                     s->deserialized_state == SERVICE_STOP ||
1558                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1559                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1560                     s->deserialized_state == SERVICE_STOP_POST ||
1561                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1562                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1563                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1564
1565                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1566                                 usec_t k;
1567
1568                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1569
1570                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1571                                         return r;
1572                         }
1573                 }
1574
1575                 if ((s->deserialized_state == SERVICE_START &&
1576                      (s->type == SERVICE_FORKING ||
1577                       s->type == SERVICE_DBUS ||
1578                       s->type == SERVICE_ONESHOT ||
1579                       s->type == SERVICE_NOTIFY)) ||
1580                     s->deserialized_state == SERVICE_START_POST ||
1581                     s->deserialized_state == SERVICE_RUNNING ||
1582                     s->deserialized_state == SERVICE_RELOAD ||
1583                     s->deserialized_state == SERVICE_STOP ||
1584                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1585                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1586                         if (s->main_pid > 0)
1587                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1588                                         return r;
1589
1590                 if (s->deserialized_state == SERVICE_START_PRE ||
1591                     s->deserialized_state == SERVICE_START ||
1592                     s->deserialized_state == SERVICE_START_POST ||
1593                     s->deserialized_state == SERVICE_RELOAD ||
1594                     s->deserialized_state == SERVICE_STOP ||
1595                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1596                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1597                     s->deserialized_state == SERVICE_STOP_POST ||
1598                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1599                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1600                         if (s->control_pid > 0)
1601                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1602                                         return r;
1603
1604                 if (s->deserialized_state == SERVICE_START_POST ||
1605                     s->deserialized_state == SERVICE_RUNNING)
1606                         service_handle_watchdog(s);
1607
1608                 service_set_state(s, s->deserialized_state);
1609         }
1610         return 0;
1611 }
1612
1613 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1614         Iterator i;
1615         int r;
1616         int *rfds = NULL;
1617         unsigned rn_fds = 0;
1618         Unit *u;
1619
1620         assert(s);
1621         assert(fds);
1622         assert(n_fds);
1623
1624         if (s->socket_fd >= 0)
1625                 return 0;
1626
1627         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1628                 int *cfds;
1629                 unsigned cn_fds;
1630                 Socket *sock;
1631
1632                 if (u->type != UNIT_SOCKET)
1633                         continue;
1634
1635                 sock = SOCKET(u);
1636
1637                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1638                         goto fail;
1639
1640                 if (!cfds)
1641                         continue;
1642
1643                 if (!rfds) {
1644                         rfds = cfds;
1645                         rn_fds = cn_fds;
1646                 } else {
1647                         int *t;
1648
1649                         if (!(t = new(int, rn_fds+cn_fds))) {
1650                                 free(cfds);
1651                                 r = -ENOMEM;
1652                                 goto fail;
1653                         }
1654
1655                         memcpy(t, rfds, rn_fds * sizeof(int));
1656                         memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1657                         free(rfds);
1658                         free(cfds);
1659
1660                         rfds = t;
1661                         rn_fds = rn_fds+cn_fds;
1662                 }
1663         }
1664
1665         *fds = rfds;
1666         *n_fds = rn_fds;
1667
1668         return 0;
1669
1670 fail:
1671         free(rfds);
1672
1673         return r;
1674 }
1675
1676 static int service_spawn(
1677                 Service *s,
1678                 ExecCommand *c,
1679                 bool timeout,
1680                 bool pass_fds,
1681                 bool apply_permissions,
1682                 bool apply_chroot,
1683                 bool apply_tty_stdin,
1684                 bool set_notify_socket,
1685                 pid_t *_pid) {
1686
1687         pid_t pid;
1688         int r;
1689         int *fds = NULL, *fdsbuf = NULL;
1690         unsigned n_fds = 0, n_env = 0;
1691         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1692
1693         assert(s);
1694         assert(c);
1695         assert(_pid);
1696
1697         if (pass_fds ||
1698             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1699             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1700             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1701
1702                 if (s->socket_fd >= 0) {
1703                         fds = &s->socket_fd;
1704                         n_fds = 1;
1705                 } else {
1706                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1707                                 goto fail;
1708
1709                         fds = fdsbuf;
1710                 }
1711         }
1712
1713         if (timeout && s->timeout_usec) {
1714                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1715                         goto fail;
1716         } else
1717                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1718
1719         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1720                 r = -ENOMEM;
1721                 goto fail;
1722         }
1723
1724         if (!(our_env = new0(char*, 4))) {
1725                 r = -ENOMEM;
1726                 goto fail;
1727         }
1728
1729         if (set_notify_socket)
1730                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1731                         r = -ENOMEM;
1732                         goto fail;
1733                 }
1734
1735         if (s->main_pid > 0)
1736                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1737                         r = -ENOMEM;
1738                         goto fail;
1739                 }
1740
1741         if (s->watchdog_usec > 0)
1742                 if (asprintf(our_env + n_env++, "WATCHDOG_USEC=%llu", (unsigned long long) s->watchdog_usec) < 0) {
1743                         r = -ENOMEM;
1744                         goto fail;
1745                 }
1746
1747         if (!(final_env = strv_env_merge(2,
1748                                          UNIT(s)->manager->environment,
1749                                          our_env,
1750                                          NULL))) {
1751                 r = -ENOMEM;
1752                 goto fail;
1753         }
1754
1755         r = exec_spawn(c,
1756                        argv,
1757                        &s->exec_context,
1758                        fds, n_fds,
1759                        final_env,
1760                        apply_permissions,
1761                        apply_chroot,
1762                        apply_tty_stdin,
1763                        UNIT(s)->manager->confirm_spawn,
1764                        UNIT(s)->cgroup_bondings,
1765                        UNIT(s)->cgroup_attributes,
1766                        &pid);
1767
1768         if (r < 0)
1769                 goto fail;
1770
1771
1772         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1773                 /* FIXME: we need to do something here */
1774                 goto fail;
1775
1776         free(fdsbuf);
1777         strv_free(argv);
1778         strv_free(our_env);
1779         strv_free(final_env);
1780
1781         *_pid = pid;
1782
1783         return 0;
1784
1785 fail:
1786         free(fdsbuf);
1787         strv_free(argv);
1788         strv_free(our_env);
1789         strv_free(final_env);
1790
1791         if (timeout)
1792                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1793
1794         return r;
1795 }
1796
1797 static int main_pid_good(Service *s) {
1798         assert(s);
1799
1800         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1801          * don't know */
1802
1803         /* If we know the pid file, then lets just check if it is
1804          * still valid */
1805         if (s->main_pid_known) {
1806
1807                 /* If it's an alien child let's check if it is still
1808                  * alive ... */
1809                 if (s->main_pid_alien)
1810                         return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1811
1812                 /* .. otherwise assume we'll get a SIGCHLD for it,
1813                  * which we really should wait for to collect exit
1814                  * status and code */
1815                 return s->main_pid > 0;
1816         }
1817
1818         /* We don't know the pid */
1819         return -EAGAIN;
1820 }
1821
1822 static int control_pid_good(Service *s) {
1823         assert(s);
1824
1825         return s->control_pid > 0;
1826 }
1827
1828 static int cgroup_good(Service *s) {
1829         int r;
1830
1831         assert(s);
1832
1833         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->cgroup_bondings)) < 0)
1834                 return r;
1835
1836         return !r;
1837 }
1838
1839 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1840         int r;
1841         assert(s);
1842
1843         if (f != SERVICE_SUCCESS)
1844                 s->result = f;
1845
1846         if (allow_restart &&
1847             !s->forbid_restart &&
1848             (s->restart == SERVICE_RESTART_ALWAYS ||
1849              (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1850              (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1851              (s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
1852                                                          s->result == SERVICE_FAILURE_CORE_DUMP)))) {
1853
1854                 r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch);
1855                 if (r < 0)
1856                         goto fail;
1857
1858                 service_set_state(s, SERVICE_AUTO_RESTART);
1859         } else
1860                 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1861
1862         s->forbid_restart = false;
1863
1864         return;
1865
1866 fail:
1867         log_warning("%s failed to run install restart timer: %s", UNIT(s)->id, strerror(-r));
1868         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1869 }
1870
1871 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
1872
1873 static void service_enter_stop_post(Service *s, ServiceResult f) {
1874         int r;
1875         assert(s);
1876
1877         if (f != SERVICE_SUCCESS)
1878                 s->result = f;
1879
1880         service_unwatch_control_pid(s);
1881
1882         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1883                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1884
1885                 if ((r = service_spawn(s,
1886                                        s->control_command,
1887                                        true,
1888                                        false,
1889                                        !s->permissions_start_only,
1890                                        !s->root_directory_start_only,
1891                                        true,
1892                                        false,
1893                                        &s->control_pid)) < 0)
1894                         goto fail;
1895
1896
1897                 service_set_state(s, SERVICE_STOP_POST);
1898         } else
1899                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1900
1901         return;
1902
1903 fail:
1904         log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r));
1905         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1906 }
1907
1908 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1909         int r;
1910         Set *pid_set = NULL;
1911         bool wait_for_exit = false;
1912
1913         assert(s);
1914
1915         if (f != SERVICE_SUCCESS)
1916                 s->result = f;
1917
1918         if (s->exec_context.kill_mode != KILL_NONE) {
1919                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1920
1921                 if (s->main_pid > 0) {
1922                         if (kill_and_sigcont(s->main_pid, sig) < 0 && errno != ESRCH)
1923                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1924                         else
1925                                 wait_for_exit = !s->main_pid_alien;
1926                 }
1927
1928                 if (s->control_pid > 0) {
1929                         if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1930                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1931                         else
1932                                 wait_for_exit = true;
1933                 }
1934
1935                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1936
1937                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1938                                 r = -ENOMEM;
1939                                 goto fail;
1940                         }
1941
1942                         /* Exclude the main/control pids from being killed via the cgroup */
1943                         if (s->main_pid > 0)
1944                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1945                                         goto fail;
1946
1947                         if (s->control_pid > 0)
1948                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1949                                         goto fail;
1950
1951                         if ((r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, pid_set)) < 0) {
1952                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1953                                         log_warning("Failed to kill control group: %s", strerror(-r));
1954                         } else if (r > 0)
1955                                 wait_for_exit = true;
1956
1957                         set_free(pid_set);
1958                         pid_set = NULL;
1959                 }
1960         }
1961
1962         if (wait_for_exit) {
1963                 if (s->timeout_usec > 0)
1964                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1965                                 goto fail;
1966
1967                 service_set_state(s, state);
1968         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1969                 service_enter_stop_post(s, SERVICE_SUCCESS);
1970         else
1971                 service_enter_dead(s, SERVICE_SUCCESS, true);
1972
1973         return;
1974
1975 fail:
1976         log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1977
1978         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1979                 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1980         else
1981                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1982
1983         if (pid_set)
1984                 set_free(pid_set);
1985 }
1986
1987 static void service_enter_stop(Service *s, ServiceResult f) {
1988         int r;
1989
1990         assert(s);
1991
1992         if (f != SERVICE_SUCCESS)
1993                 s->result = f;
1994
1995         service_unwatch_control_pid(s);
1996
1997         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1998                 s->control_command_id = SERVICE_EXEC_STOP;
1999
2000                 if ((r = service_spawn(s,
2001                                        s->control_command,
2002                                        true,
2003                                        false,
2004                                        !s->permissions_start_only,
2005                                        !s->root_directory_start_only,
2006                                        false,
2007                                        false,
2008                                        &s->control_pid)) < 0)
2009                         goto fail;
2010
2011                 service_set_state(s, SERVICE_STOP);
2012         } else
2013                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2014
2015         return;
2016
2017 fail:
2018         log_warning("%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2019         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2020 }
2021
2022 static void service_enter_running(Service *s, ServiceResult f) {
2023         int main_pid_ok, cgroup_ok;
2024         assert(s);
2025
2026         if (f != SERVICE_SUCCESS)
2027                 s->result = f;
2028
2029         main_pid_ok = main_pid_good(s);
2030         cgroup_ok = cgroup_good(s);
2031
2032         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2033             (s->bus_name_good || s->type != SERVICE_DBUS))
2034                 service_set_state(s, SERVICE_RUNNING);
2035         else if (s->remain_after_exit)
2036                 service_set_state(s, SERVICE_EXITED);
2037         else
2038                 service_enter_stop(s, SERVICE_SUCCESS);
2039 }
2040
2041 static void service_enter_start_post(Service *s) {
2042         int r;
2043         assert(s);
2044
2045         service_unwatch_control_pid(s);
2046
2047         if (s->watchdog_usec > 0)
2048                 service_reset_watchdog(s);
2049
2050         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
2051                 s->control_command_id = SERVICE_EXEC_START_POST;
2052
2053                 if ((r = service_spawn(s,
2054                                        s->control_command,
2055                                        true,
2056                                        false,
2057                                        !s->permissions_start_only,
2058                                        !s->root_directory_start_only,
2059                                        false,
2060                                        false,
2061                                        &s->control_pid)) < 0)
2062                         goto fail;
2063
2064                 service_set_state(s, SERVICE_START_POST);
2065         } else
2066                 service_enter_running(s, SERVICE_SUCCESS);
2067
2068         return;
2069
2070 fail:
2071         log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2072         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2073 }
2074
2075 static void service_enter_start(Service *s) {
2076         pid_t pid;
2077         int r;
2078         ExecCommand *c;
2079
2080         assert(s);
2081
2082         assert(s->exec_command[SERVICE_EXEC_START]);
2083         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2084
2085         if (s->type == SERVICE_FORKING)
2086                 service_unwatch_control_pid(s);
2087         else
2088                 service_unwatch_main_pid(s);
2089
2090         /* We want to ensure that nobody leaks processes from
2091          * START_PRE here, so let's go on a killing spree, People
2092          * should not spawn long running processes from START_PRE. */
2093         cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, NULL);
2094
2095         if (s->type == SERVICE_FORKING) {
2096                 s->control_command_id = SERVICE_EXEC_START;
2097                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2098
2099                 s->main_command = NULL;
2100         } else {
2101                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2102                 s->control_command = NULL;
2103
2104                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2105         }
2106
2107         if ((r = service_spawn(s,
2108                                c,
2109                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2110                                true,
2111                                true,
2112                                true,
2113                                true,
2114                                s->notify_access != NOTIFY_NONE,
2115                                &pid)) < 0)
2116                 goto fail;
2117
2118         if (s->type == SERVICE_SIMPLE) {
2119                 /* For simple services we immediately start
2120                  * the START_POST binaries. */
2121
2122                 service_set_main_pid(s, pid);
2123                 service_enter_start_post(s);
2124
2125         } else  if (s->type == SERVICE_FORKING) {
2126
2127                 /* For forking services we wait until the start
2128                  * process exited. */
2129
2130                 s->control_pid = pid;
2131                 service_set_state(s, SERVICE_START);
2132
2133         } else if (s->type == SERVICE_ONESHOT ||
2134                    s->type == SERVICE_DBUS ||
2135                    s->type == SERVICE_NOTIFY) {
2136
2137                 /* For oneshot services we wait until the start
2138                  * process exited, too, but it is our main process. */
2139
2140                 /* For D-Bus services we know the main pid right away,
2141                  * but wait for the bus name to appear on the
2142                  * bus. Notify services are similar. */
2143
2144                 service_set_main_pid(s, pid);
2145                 service_set_state(s, SERVICE_START);
2146         } else
2147                 assert_not_reached("Unknown service type");
2148
2149         return;
2150
2151 fail:
2152         log_warning("%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2153         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2154 }
2155
2156 static void service_enter_start_pre(Service *s) {
2157         int r;
2158
2159         assert(s);
2160
2161         service_unwatch_control_pid(s);
2162
2163         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2164
2165                 /* Before we start anything, let's clear up what might
2166                  * be left from previous runs. */
2167                 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, NULL);
2168
2169                 s->control_command_id = SERVICE_EXEC_START_PRE;
2170
2171                 if ((r = service_spawn(s,
2172                                        s->control_command,
2173                                        true,
2174                                        false,
2175                                        !s->permissions_start_only,
2176                                        !s->root_directory_start_only,
2177                                        true,
2178                                        false,
2179                                        &s->control_pid)) < 0)
2180                         goto fail;
2181
2182                 service_set_state(s, SERVICE_START_PRE);
2183         } else
2184                 service_enter_start(s);
2185
2186         return;
2187
2188 fail:
2189         log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2190         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2191 }
2192
2193 static void service_enter_restart(Service *s) {
2194         int r;
2195         DBusError error;
2196
2197         assert(s);
2198         dbus_error_init(&error);
2199
2200         if (UNIT(s)->job) {
2201                 log_info("Job pending for unit, delaying automatic restart.");
2202
2203                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2204                         goto fail;
2205         }
2206
2207         service_enter_dead(s, SERVICE_SUCCESS, false);
2208
2209         if ((r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2210                 goto fail;
2211
2212         log_debug("%s scheduled restart job.", UNIT(s)->id);
2213         return;
2214
2215 fail:
2216         log_warning("%s failed to schedule restart job: %s", UNIT(s)->id, bus_error(&error, -r));
2217         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2218
2219         dbus_error_free(&error);
2220 }
2221
2222 static void service_enter_reload(Service *s) {
2223         int r;
2224
2225         assert(s);
2226
2227         service_unwatch_control_pid(s);
2228
2229         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2230                 s->control_command_id = SERVICE_EXEC_RELOAD;
2231
2232                 if ((r = service_spawn(s,
2233                                        s->control_command,
2234                                        true,
2235                                        false,
2236                                        !s->permissions_start_only,
2237                                        !s->root_directory_start_only,
2238                                        false,
2239                                        false,
2240                                        &s->control_pid)) < 0)
2241                         goto fail;
2242
2243                 service_set_state(s, SERVICE_RELOAD);
2244         } else
2245                 service_enter_running(s, SERVICE_SUCCESS);
2246
2247         return;
2248
2249 fail:
2250         log_warning("%s failed to run 'reload' task: %s", UNIT(s)->id, strerror(-r));
2251         s->reload_result = SERVICE_FAILURE_RESOURCES;
2252         service_enter_running(s, SERVICE_SUCCESS);
2253 }
2254
2255 static void service_run_next_control(Service *s) {
2256         int r;
2257
2258         assert(s);
2259         assert(s->control_command);
2260         assert(s->control_command->command_next);
2261
2262         assert(s->control_command_id != SERVICE_EXEC_START);
2263
2264         s->control_command = s->control_command->command_next;
2265         service_unwatch_control_pid(s);
2266
2267         if ((r = service_spawn(s,
2268                                s->control_command,
2269                                true,
2270                                false,
2271                                !s->permissions_start_only,
2272                                !s->root_directory_start_only,
2273                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2274                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2275                                false,
2276                                &s->control_pid)) < 0)
2277                 goto fail;
2278
2279         return;
2280
2281 fail:
2282         log_warning("%s failed to run next control task: %s", UNIT(s)->id, strerror(-r));
2283
2284         if (s->state == SERVICE_START_PRE)
2285                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2286         else if (s->state == SERVICE_STOP)
2287                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2288         else if (s->state == SERVICE_STOP_POST)
2289                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2290         else if (s->state == SERVICE_RELOAD) {
2291                 s->reload_result = SERVICE_FAILURE_RESOURCES;
2292                 service_enter_running(s, SERVICE_SUCCESS);
2293         } else
2294                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2295 }
2296
2297 static void service_run_next_main(Service *s) {
2298         pid_t pid;
2299         int r;
2300
2301         assert(s);
2302         assert(s->main_command);
2303         assert(s->main_command->command_next);
2304         assert(s->type == SERVICE_ONESHOT);
2305
2306         s->main_command = s->main_command->command_next;
2307         service_unwatch_main_pid(s);
2308
2309         if ((r = service_spawn(s,
2310                                s->main_command,
2311                                false,
2312                                true,
2313                                true,
2314                                true,
2315                                true,
2316                                s->notify_access != NOTIFY_NONE,
2317                                &pid)) < 0)
2318                 goto fail;
2319
2320         service_set_main_pid(s, pid);
2321
2322         return;
2323
2324 fail:
2325         log_warning("%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2326         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2327 }
2328
2329 static int service_start_limit_test(Service *s) {
2330         assert(s);
2331
2332         if (ratelimit_test(&s->start_limit))
2333                 return 0;
2334
2335         switch (s->start_limit_action) {
2336
2337         case SERVICE_START_LIMIT_NONE:
2338                 log_warning("%s start request repeated too quickly, refusing to start.", UNIT(s)->id);
2339                 break;
2340
2341         case SERVICE_START_LIMIT_REBOOT: {
2342                 DBusError error;
2343                 int r;
2344
2345                 dbus_error_init(&error);
2346
2347                 log_warning("%s start request repeated too quickly, rebooting.", UNIT(s)->id);
2348
2349                 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE, true, &error, NULL);
2350                 if (r < 0) {
2351                         log_error("Failed to reboot: %s.", bus_error(&error, r));
2352                         dbus_error_free(&error);
2353                 }
2354
2355                 break;
2356         }
2357
2358         case SERVICE_START_LIMIT_REBOOT_FORCE:
2359                 log_warning("%s start request repeated too quickly, force rebooting.", UNIT(s)->id);
2360                 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2361                 break;
2362
2363         case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
2364                 log_warning("%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
2365                 reboot(RB_AUTOBOOT);
2366                 break;
2367
2368         default:
2369                 log_error("start limit action=%i", s->start_limit_action);
2370                 assert_not_reached("Unknown StartLimitAction.");
2371         }
2372
2373         return -ECANCELED;
2374 }
2375
2376 static int service_start(Unit *u) {
2377         Service *s = SERVICE(u);
2378         int r;
2379
2380         assert(s);
2381
2382         /* We cannot fulfill this request right now, try again later
2383          * please! */
2384         if (s->state == SERVICE_STOP ||
2385             s->state == SERVICE_STOP_SIGTERM ||
2386             s->state == SERVICE_STOP_SIGKILL ||
2387             s->state == SERVICE_STOP_POST ||
2388             s->state == SERVICE_FINAL_SIGTERM ||
2389             s->state == SERVICE_FINAL_SIGKILL)
2390                 return -EAGAIN;
2391
2392         /* Already on it! */
2393         if (s->state == SERVICE_START_PRE ||
2394             s->state == SERVICE_START ||
2395             s->state == SERVICE_START_POST)
2396                 return 0;
2397
2398         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2399
2400         /* Make sure we don't enter a busy loop of some kind. */
2401         r = service_start_limit_test(s);
2402         if (r < 0)
2403                 return r;
2404
2405         s->result = SERVICE_SUCCESS;
2406         s->reload_result = SERVICE_SUCCESS;
2407         s->main_pid_known = false;
2408         s->main_pid_alien = false;
2409         s->forbid_restart = false;
2410
2411         service_enter_start_pre(s);
2412         return 0;
2413 }
2414
2415 static int service_stop(Unit *u) {
2416         Service *s = SERVICE(u);
2417
2418         assert(s);
2419
2420         /* This is a user request, so don't do restarts on this
2421          * shutdown. */
2422         s->forbid_restart = true;
2423
2424         /* Already on it */
2425         if (s->state == SERVICE_STOP ||
2426             s->state == SERVICE_STOP_SIGTERM ||
2427             s->state == SERVICE_STOP_SIGKILL ||
2428             s->state == SERVICE_STOP_POST ||
2429             s->state == SERVICE_FINAL_SIGTERM ||
2430             s->state == SERVICE_FINAL_SIGKILL)
2431                 return 0;
2432
2433         /* Don't allow a restart */
2434         if (s->state == SERVICE_AUTO_RESTART) {
2435                 service_set_state(s, SERVICE_DEAD);
2436                 return 0;
2437         }
2438
2439         /* If there's already something running we go directly into
2440          * kill mode. */
2441         if (s->state == SERVICE_START_PRE ||
2442             s->state == SERVICE_START ||
2443             s->state == SERVICE_START_POST ||
2444             s->state == SERVICE_RELOAD) {
2445                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2446                 return 0;
2447         }
2448
2449         assert(s->state == SERVICE_RUNNING ||
2450                s->state == SERVICE_EXITED);
2451
2452         service_enter_stop(s, SERVICE_SUCCESS);
2453         return 0;
2454 }
2455
2456 static int service_reload(Unit *u) {
2457         Service *s = SERVICE(u);
2458
2459         assert(s);
2460
2461         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2462
2463         service_enter_reload(s);
2464         return 0;
2465 }
2466
2467 static bool service_can_reload(Unit *u) {
2468         Service *s = SERVICE(u);
2469
2470         assert(s);
2471
2472         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2473 }
2474
2475 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2476         Service *s = SERVICE(u);
2477
2478         assert(u);
2479         assert(f);
2480         assert(fds);
2481
2482         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2483         unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2484         unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2485
2486         if (s->control_pid > 0)
2487                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2488
2489         if (s->main_pid_known && s->main_pid > 0)
2490                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2491
2492         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2493
2494         if (s->status_text)
2495                 unit_serialize_item(u, f, "status-text", s->status_text);
2496
2497         /* FIXME: There's a minor uncleanliness here: if there are
2498          * multiple commands attached here, we will start from the
2499          * first one again */
2500         if (s->control_command_id >= 0)
2501                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2502
2503         if (s->socket_fd >= 0) {
2504                 int copy;
2505
2506                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2507                         return copy;
2508
2509                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2510         }
2511
2512         if (s->main_exec_status.pid > 0) {
2513                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2514                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2515                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2516
2517                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2518                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2519                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2520                 }
2521         }
2522         if (dual_timestamp_is_set(&s->watchdog_timestamp))
2523                 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2524
2525         return 0;
2526 }
2527
2528 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2529         Service *s = SERVICE(u);
2530
2531         assert(u);
2532         assert(key);
2533         assert(value);
2534         assert(fds);
2535
2536         if (streq(key, "state")) {
2537                 ServiceState state;
2538
2539                 if ((state = service_state_from_string(value)) < 0)
2540                         log_debug("Failed to parse state value %s", value);
2541                 else
2542                         s->deserialized_state = state;
2543         } else if (streq(key, "result")) {
2544                 ServiceResult f;
2545
2546                 f = service_result_from_string(value);
2547                 if (f < 0)
2548                         log_debug("Failed to parse result value %s", value);
2549                 else if (f != SERVICE_SUCCESS)
2550                         s->result = f;
2551
2552         } else if (streq(key, "reload-result")) {
2553                 ServiceResult f;
2554
2555                 f = service_result_from_string(value);
2556                 if (f < 0)
2557                         log_debug("Failed to parse reload result value %s", value);
2558                 else if (f != SERVICE_SUCCESS)
2559                         s->reload_result = f;
2560
2561         } else if (streq(key, "control-pid")) {
2562                 pid_t pid;
2563
2564                 if (parse_pid(value, &pid) < 0)
2565                         log_debug("Failed to parse control-pid value %s", value);
2566                 else
2567                         s->control_pid = pid;
2568         } else if (streq(key, "main-pid")) {
2569                 pid_t pid;
2570
2571                 if (parse_pid(value, &pid) < 0)
2572                         log_debug("Failed to parse main-pid value %s", value);
2573                 else
2574                         service_set_main_pid(s, (pid_t) pid);
2575         } else if (streq(key, "main-pid-known")) {
2576                 int b;
2577
2578                 if ((b = parse_boolean(value)) < 0)
2579                         log_debug("Failed to parse main-pid-known value %s", value);
2580                 else
2581                         s->main_pid_known = b;
2582         } else if (streq(key, "status-text")) {
2583                 char *t;
2584
2585                 if ((t = strdup(value))) {
2586                         free(s->status_text);
2587                         s->status_text = t;
2588                 }
2589
2590         } else if (streq(key, "control-command")) {
2591                 ServiceExecCommand id;
2592
2593                 if ((id = service_exec_command_from_string(value)) < 0)
2594                         log_debug("Failed to parse exec-command value %s", value);
2595                 else {
2596                         s->control_command_id = id;
2597                         s->control_command = s->exec_command[id];
2598                 }
2599         } else if (streq(key, "socket-fd")) {
2600                 int fd;
2601
2602                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2603                         log_debug("Failed to parse socket-fd value %s", value);
2604                 else {
2605
2606                         if (s->socket_fd >= 0)
2607                                 close_nointr_nofail(s->socket_fd);
2608                         s->socket_fd = fdset_remove(fds, fd);
2609                 }
2610         } else if (streq(key, "main-exec-status-pid")) {
2611                 pid_t pid;
2612
2613                 if (parse_pid(value, &pid) < 0)
2614                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2615                 else
2616                         s->main_exec_status.pid = pid;
2617         } else if (streq(key, "main-exec-status-code")) {
2618                 int i;
2619
2620                 if (safe_atoi(value, &i) < 0)
2621                         log_debug("Failed to parse main-exec-status-code value %s", value);
2622                 else
2623                         s->main_exec_status.code = i;
2624         } else if (streq(key, "main-exec-status-status")) {
2625                 int i;
2626
2627                 if (safe_atoi(value, &i) < 0)
2628                         log_debug("Failed to parse main-exec-status-status value %s", value);
2629                 else
2630                         s->main_exec_status.status = i;
2631         } else if (streq(key, "main-exec-status-start"))
2632                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2633         else if (streq(key, "main-exec-status-exit"))
2634                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2635         else if (streq(key, "watchdog-timestamp"))
2636                 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2637         else
2638                 log_debug("Unknown serialization key '%s'", key);
2639
2640         return 0;
2641 }
2642
2643 static UnitActiveState service_active_state(Unit *u) {
2644         assert(u);
2645
2646         return state_translation_table[SERVICE(u)->state];
2647 }
2648
2649 static const char *service_sub_state_to_string(Unit *u) {
2650         assert(u);
2651
2652         return service_state_to_string(SERVICE(u)->state);
2653 }
2654
2655 static bool service_check_gc(Unit *u) {
2656         Service *s = SERVICE(u);
2657
2658         assert(s);
2659
2660         /* Never clean up services that still have a process around,
2661          * even if the service is formally dead. */
2662         if (cgroup_good(s) > 0 ||
2663             main_pid_good(s) > 0 ||
2664             control_pid_good(s) > 0)
2665                 return true;
2666
2667 #ifdef HAVE_SYSV_COMPAT
2668         if (s->sysv_path)
2669                 return true;
2670 #endif
2671
2672         return false;
2673 }
2674
2675 static bool service_check_snapshot(Unit *u) {
2676         Service *s = SERVICE(u);
2677
2678         assert(s);
2679
2680         return !s->got_socket_fd;
2681 }
2682
2683 static int service_retry_pid_file(Service *s) {
2684         int r;
2685
2686         assert(s->pid_file);
2687         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2688
2689         r = service_load_pid_file(s, false);
2690         if (r < 0)
2691                 return r;
2692
2693         service_unwatch_pid_file(s);
2694
2695         service_enter_running(s, SERVICE_SUCCESS);
2696         return 0;
2697 }
2698
2699 static int service_watch_pid_file(Service *s) {
2700         int r;
2701
2702         log_debug("Setting watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
2703         r = path_spec_watch(s->pid_file_pathspec, UNIT(s));
2704         if (r < 0)
2705                 goto fail;
2706
2707         /* the pidfile might have appeared just before we set the watch */
2708         service_retry_pid_file(s);
2709
2710         return 0;
2711 fail:
2712         log_error("Failed to set a watch for %s's PID file %s: %s",
2713                   UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2714         service_unwatch_pid_file(s);
2715         return r;
2716 }
2717
2718 static int service_demand_pid_file(Service *s) {
2719         PathSpec *ps;
2720
2721         assert(s->pid_file);
2722         assert(!s->pid_file_pathspec);
2723
2724         ps = new0(PathSpec, 1);
2725         if (!ps)
2726                 return -ENOMEM;
2727
2728         ps->path = strdup(s->pid_file);
2729         if (!ps->path) {
2730                 free(ps);
2731                 return -ENOMEM;
2732         }
2733
2734         path_kill_slashes(ps->path);
2735
2736         /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2737          * keep their PID file open all the time. */
2738         ps->type = PATH_MODIFIED;
2739         ps->inotify_fd = -1;
2740
2741         s->pid_file_pathspec = ps;
2742
2743         return service_watch_pid_file(s);
2744 }
2745
2746 static void service_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
2747         Service *s = SERVICE(u);
2748
2749         assert(s);
2750         assert(fd >= 0);
2751         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2752         assert(s->pid_file_pathspec);
2753         assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2754
2755         log_debug("inotify event for %s", u->id);
2756
2757         if (path_spec_fd_event(s->pid_file_pathspec, events) < 0)
2758                 goto fail;
2759
2760         if (service_retry_pid_file(s) == 0)
2761                 return;
2762
2763         if (service_watch_pid_file(s) < 0)
2764                 goto fail;
2765
2766         return;
2767 fail:
2768         service_unwatch_pid_file(s);
2769         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2770 }
2771
2772 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2773         Service *s = SERVICE(u);
2774         ServiceResult f;
2775
2776         assert(s);
2777         assert(pid >= 0);
2778
2779         if (UNIT(s)->fragment_path ? is_clean_exit(code, status) : is_clean_exit_lsb(code, status))
2780                 f = SERVICE_SUCCESS;
2781         else if (code == CLD_EXITED)
2782                 f = SERVICE_FAILURE_EXIT_CODE;
2783         else if (code == CLD_KILLED)
2784                 f = SERVICE_FAILURE_SIGNAL;
2785         else if (code == CLD_DUMPED)
2786                 f = SERVICE_FAILURE_CORE_DUMP;
2787         else
2788                 assert_not_reached("Unknown code");
2789
2790         if (s->main_pid == pid) {
2791                 /* Forking services may occasionally move to a new PID.
2792                  * As long as they update the PID file before exiting the old
2793                  * PID, they're fine. */
2794                 if (service_load_pid_file(s, false) == 0)
2795                         return;
2796
2797                 s->main_pid = 0;
2798                 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2799
2800                 /* If this is not a forking service than the main
2801                  * process got started and hence we copy the exit
2802                  * status so that it is recorded both as main and as
2803                  * control process exit status */
2804                 if (s->main_command) {
2805                         s->main_command->exec_status = s->main_exec_status;
2806
2807                         if (s->main_command->ignore)
2808                                 f = SERVICE_SUCCESS;
2809                 }
2810
2811                 log_full(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2812                          "%s: main process exited, code=%s, status=%i", u->id, sigchld_code_to_string(code), status);
2813
2814                 if (f != SERVICE_SUCCESS)
2815                         s->result = f;
2816
2817                 if (s->main_command &&
2818                     s->main_command->command_next &&
2819                     f == SERVICE_SUCCESS) {
2820
2821                         /* There is another command to *
2822                          * execute, so let's do that. */
2823
2824                         log_debug("%s running next main command for state %s", u->id, service_state_to_string(s->state));
2825                         service_run_next_main(s);
2826
2827                 } else {
2828
2829                         /* The service exited, so the service is officially
2830                          * gone. */
2831                         s->main_command = NULL;
2832
2833                         switch (s->state) {
2834
2835                         case SERVICE_START_POST:
2836                         case SERVICE_RELOAD:
2837                         case SERVICE_STOP:
2838                                 /* Need to wait until the operation is
2839                                  * done */
2840                                 break;
2841
2842                         case SERVICE_START:
2843                                 if (s->type == SERVICE_ONESHOT) {
2844                                         /* This was our main goal, so let's go on */
2845                                         if (f == SERVICE_SUCCESS)
2846                                                 service_enter_start_post(s);
2847                                         else
2848                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2849                                         break;
2850                                 } else {
2851                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2852
2853                                         /* Fall through */
2854                                 }
2855
2856                         case SERVICE_RUNNING:
2857                                 service_enter_running(s, f);
2858                                 break;
2859
2860                         case SERVICE_STOP_SIGTERM:
2861                         case SERVICE_STOP_SIGKILL:
2862
2863                                 if (!control_pid_good(s))
2864                                         service_enter_stop_post(s, f);
2865
2866                                 /* If there is still a control process, wait for that first */
2867                                 break;
2868
2869                         default:
2870                                 assert_not_reached("Uh, main process died at wrong time.");
2871                         }
2872                 }
2873
2874         } else if (s->control_pid == pid) {
2875
2876                 s->control_pid = 0;
2877
2878                 if (s->control_command) {
2879                         exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2880
2881                         if (s->control_command->ignore)
2882                                 f = SERVICE_SUCCESS;
2883                 }
2884
2885                 log_full(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2886                          "%s: control process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
2887
2888                 if (f != SERVICE_SUCCESS)
2889                         s->result = f;
2890
2891                 if (s->control_command &&
2892                     s->control_command->command_next &&
2893                     f == SERVICE_SUCCESS) {
2894
2895                         /* There is another command to *
2896                          * execute, so let's do that. */
2897
2898                         log_debug("%s running next control command for state %s", u->id, service_state_to_string(s->state));
2899                         service_run_next_control(s);
2900
2901                 } else {
2902                         /* No further commands for this step, so let's
2903                          * figure out what to do next */
2904
2905                         s->control_command = NULL;
2906                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2907
2908                         log_debug("%s got final SIGCHLD for state %s", u->id, service_state_to_string(s->state));
2909
2910                         switch (s->state) {
2911
2912                         case SERVICE_START_PRE:
2913                                 if (f == SERVICE_SUCCESS)
2914                                         service_enter_start(s);
2915                                 else
2916                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2917                                 break;
2918
2919                         case SERVICE_START:
2920                                 assert(s->type == SERVICE_FORKING);
2921
2922                                 if (f != SERVICE_SUCCESS) {
2923                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2924                                         break;
2925                                 }
2926
2927                                 if (s->pid_file) {
2928                                         bool has_start_post;
2929                                         int r;
2930
2931                                         /* Let's try to load the pid file here if we can.
2932                                          * The PID file might actually be created by a START_POST
2933                                          * script. In that case don't worry if the loading fails. */
2934
2935                                         has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
2936                                         r = service_load_pid_file(s, !has_start_post);
2937                                         if (!has_start_post && r < 0) {
2938                                                 r = service_demand_pid_file(s);
2939                                                 if (r < 0 || !cgroup_good(s))
2940                                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2941                                                 break;
2942                                         }
2943                                 } else
2944                                         service_search_main_pid(s);
2945
2946                                 service_enter_start_post(s);
2947                                 break;
2948
2949                         case SERVICE_START_POST:
2950                                 if (f != SERVICE_SUCCESS) {
2951                                         service_enter_stop(s, f);
2952                                         break;
2953                                 }
2954
2955                                 if (s->pid_file) {
2956                                         int r;
2957
2958                                         r = service_load_pid_file(s, true);
2959                                         if (r < 0) {
2960                                                 r = service_demand_pid_file(s);
2961                                                 if (r < 0 || !cgroup_good(s))
2962                                                         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2963                                                 break;
2964                                         }
2965                                 } else
2966                                         service_search_main_pid(s);
2967
2968                                 service_enter_running(s, SERVICE_SUCCESS);
2969                                 break;
2970
2971                         case SERVICE_RELOAD:
2972                                 if (f == SERVICE_SUCCESS) {
2973                                         service_load_pid_file(s, true);
2974                                         service_search_main_pid(s);
2975                                 }
2976
2977                                 s->reload_result = f;
2978                                 service_enter_running(s, SERVICE_SUCCESS);
2979                                 break;
2980
2981                         case SERVICE_STOP:
2982                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2983                                 break;
2984
2985                         case SERVICE_STOP_SIGTERM:
2986                         case SERVICE_STOP_SIGKILL:
2987                                 if (main_pid_good(s) <= 0)
2988                                         service_enter_stop_post(s, f);
2989
2990                                 /* If there is still a service
2991                                  * process around, wait until
2992                                  * that one quit, too */
2993                                 break;
2994
2995                         case SERVICE_STOP_POST:
2996                         case SERVICE_FINAL_SIGTERM:
2997                         case SERVICE_FINAL_SIGKILL:
2998                                 service_enter_dead(s, f, true);
2999                                 break;
3000
3001                         default:
3002                                 assert_not_reached("Uh, control process died at wrong time.");
3003                         }
3004                 }
3005         }
3006
3007         /* Notify clients about changed exit status */
3008         unit_add_to_dbus_queue(u);
3009 }
3010
3011 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
3012         Service *s = SERVICE(u);
3013
3014         assert(s);
3015         assert(elapsed == 1);
3016
3017         if (w == &s->watchdog_watch) {
3018                 service_handle_watchdog(s);
3019                 return;
3020         }
3021
3022         assert(w == &s->timer_watch);
3023
3024         switch (s->state) {
3025
3026         case SERVICE_START_PRE:
3027         case SERVICE_START:
3028                 log_warning("%s operation timed out. Terminating.", u->id);
3029                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3030                 break;
3031
3032         case SERVICE_START_POST:
3033                 log_warning("%s operation timed out. Stopping.", u->id);
3034                 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3035                 break;
3036
3037         case SERVICE_RELOAD:
3038                 log_warning("%s operation timed out. Stopping.", u->id);
3039                 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3040                 service_enter_running(s, SERVICE_SUCCESS);
3041                 break;
3042
3043         case SERVICE_STOP:
3044                 log_warning("%s stopping timed out. Terminating.", u->id);
3045                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3046                 break;
3047
3048         case SERVICE_STOP_SIGTERM:
3049                 if (s->exec_context.send_sigkill) {
3050                         log_warning("%s stopping timed out. Killing.", u->id);
3051                         service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3052                 } else {
3053                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->id);
3054                         service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3055                 }
3056
3057                 break;
3058
3059         case SERVICE_STOP_SIGKILL:
3060                 /* Uh, we sent a SIGKILL and it is still not gone?
3061                  * Must be something we cannot kill, so let's just be
3062                  * weirded out and continue */
3063
3064                 log_warning("%s still around after SIGKILL. Ignoring.", u->id);
3065                 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3066                 break;
3067
3068         case SERVICE_STOP_POST:
3069                 log_warning("%s stopping timed out (2). Terminating.", u->id);
3070                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3071                 break;
3072
3073         case SERVICE_FINAL_SIGTERM:
3074                 if (s->exec_context.send_sigkill) {
3075                         log_warning("%s stopping timed out (2). Killing.", u->id);
3076                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3077                 } else {
3078                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->id);
3079                         service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3080                 }
3081
3082                 break;
3083
3084         case SERVICE_FINAL_SIGKILL:
3085                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->id);
3086                 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3087                 break;
3088
3089         case SERVICE_AUTO_RESTART:
3090                 log_info("%s holdoff time over, scheduling restart.", u->id);
3091                 service_enter_restart(s);
3092                 break;
3093
3094         default:
3095                 assert_not_reached("Timeout at wrong time.");
3096         }
3097 }
3098
3099 static void service_cgroup_notify_event(Unit *u) {
3100         Service *s = SERVICE(u);
3101
3102         assert(u);
3103
3104         log_debug("%s: cgroup is empty", u->id);
3105
3106         switch (s->state) {
3107
3108                 /* Waiting for SIGCHLD is usually more interesting,
3109                  * because it includes return codes/signals. Which is
3110                  * why we ignore the cgroup events for most cases,
3111                  * except when we don't know pid which to expect the
3112                  * SIGCHLD for. */
3113
3114         case SERVICE_START:
3115         case SERVICE_START_POST:
3116                 /* If we were hoping for the daemon to write its PID file,
3117                  * we can give up now. */
3118                 if (s->pid_file_pathspec) {
3119                         log_warning("%s never wrote its PID file. Failing.", UNIT(s)->id);
3120                         service_unwatch_pid_file(s);
3121                         if (s->state == SERVICE_START)
3122                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3123                         else
3124                                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3125                 }
3126                 break;
3127
3128         case SERVICE_RUNNING:
3129                 /* service_enter_running() will figure out what to do */
3130                 service_enter_running(s, SERVICE_SUCCESS);
3131                 break;
3132
3133         case SERVICE_STOP_SIGTERM:
3134         case SERVICE_STOP_SIGKILL:
3135
3136                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3137                         service_enter_stop_post(s, SERVICE_SUCCESS);
3138
3139                 break;
3140
3141         case SERVICE_FINAL_SIGTERM:
3142         case SERVICE_FINAL_SIGKILL:
3143                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3144                         service_enter_dead(s, SERVICE_SUCCESS, SERVICE_SUCCESS);
3145
3146                 break;
3147
3148         default:
3149                 ;
3150         }
3151 }
3152
3153 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3154         Service *s = SERVICE(u);
3155         const char *e;
3156
3157         assert(u);
3158
3159         if (s->notify_access == NOTIFY_NONE) {
3160                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
3161                             u->id, (unsigned long) pid);
3162                 return;
3163         }
3164
3165         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3166                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3167                             u->id, (unsigned long) pid, (unsigned long) s->main_pid);
3168                 return;
3169         }
3170
3171         log_debug("%s: Got message", u->id);
3172
3173         /* Interpret MAINPID= */
3174         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3175             (s->state == SERVICE_START ||
3176              s->state == SERVICE_START_POST ||
3177              s->state == SERVICE_RUNNING ||
3178              s->state == SERVICE_RELOAD)) {
3179
3180                 if (parse_pid(e + 8, &pid) < 0)
3181                         log_warning("Failed to parse notification message %s", e);
3182                 else {
3183                         log_debug("%s: got %s", u->id, e);
3184                         service_set_main_pid(s, pid);
3185                 }
3186         }
3187
3188         /* Interpret READY= */
3189         if (s->type == SERVICE_NOTIFY &&
3190             s->state == SERVICE_START &&
3191             strv_find(tags, "READY=1")) {
3192                 log_debug("%s: got READY=1", u->id);
3193
3194                 service_enter_start_post(s);
3195         }
3196
3197         /* Interpret STATUS= */
3198         if ((e = strv_find_prefix(tags, "STATUS="))) {
3199                 char *t;
3200
3201                 if (e[7]) {
3202                         if (!(t = strdup(e+7))) {
3203                                 log_error("Failed to allocate string.");
3204                                 return;
3205                         }
3206
3207                         log_debug("%s: got %s", u->id, e);
3208
3209                         free(s->status_text);
3210                         s->status_text = t;
3211                 } else {
3212                         free(s->status_text);