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