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