src/core/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26 #include <sys/reboot.h>
  27
  28 #include "manager.h"
  29 #include "unit.h"
  30 #include "service.h"
  31 #include "load-fragment.h"
  32 #include "load-dropin.h"
  33 #include "log.h"
  34 #include "strv.h"
  35 #include "unit-name.h"
  36 #include "unit-printf.h"
  37 #include "dbus-service.h"
  38 #include "special.h"
  39 #include "dbus-common.h"
  40 #include "exit-status.h"
  41 #include "def.h"
  42 #include "path-util.h"
  43 #include "util.h"
  44 #include "utf8.h"
  45 #include "env-util.h"
  46 #include "fileio.h"
  47
  48 #ifdef HAVE_SYSV_COMPAT
  49
  50 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
  51
  52 typedef enum RunlevelType {
  53         RUNLEVEL_UP,
  54         RUNLEVEL_DOWN
  55 } RunlevelType;
  56
  57 static const struct {
  58         const char *path;
  59         const char *target;
  60         const RunlevelType type;
  61 } rcnd_table[] = {
  62         /* Standard SysV runlevels for start-up */
  63         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  64         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  65         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  66         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  67         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  68
  69         /* Standard SysV runlevels for shutdown */
  70         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  71         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  72
  73         /* Note that the order here matters, as we read the
  74            directories in this order, and we want to make sure that
  75            sysv_start_priority is known when we first load the
  76            unit. And that value we only know from S links. Hence
  77            UP must be read before DOWN */
  78 };
  79
  80 #define RUNLEVELS_UP "12345"
  81 #endif
  82
  83 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  84         [SERVICE_DEAD] = UNIT_INACTIVE,
  85         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  86         [SERVICE_START] = UNIT_ACTIVATING,
  87         [SERVICE_START_POST] = UNIT_ACTIVATING,
  88         [SERVICE_RUNNING] = UNIT_ACTIVE,
  89         [SERVICE_EXITED] = UNIT_ACTIVE,
  90         [SERVICE_RELOAD] = UNIT_RELOADING,
  91         [SERVICE_STOP] = UNIT_DEACTIVATING,
  92         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  93         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  94         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  95         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  96         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  97         [SERVICE_FAILED] = UNIT_FAILED,
  98         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
  99 };
 100
 101 /* For Type=idle we never want to delay any other jobs, hence we
 102  * consider idle jobs active as soon as we start working on them */
 103 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
 104         [SERVICE_DEAD] = UNIT_INACTIVE,
 105         [SERVICE_START_PRE] = UNIT_ACTIVE,
 106         [SERVICE_START] = UNIT_ACTIVE,
 107         [SERVICE_START_POST] = UNIT_ACTIVE,
 108         [SERVICE_RUNNING] = UNIT_ACTIVE,
 109         [SERVICE_EXITED] = UNIT_ACTIVE,
 110         [SERVICE_RELOAD] = UNIT_RELOADING,
 111         [SERVICE_STOP] = UNIT_DEACTIVATING,
 112         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
 113         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 114         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 115         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 116         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 117         [SERVICE_FAILED] = UNIT_FAILED,
 118         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 119 };
 120
 121 static void service_init(Unit *u) {
 122         Service *s = SERVICE(u);
 123
 124         assert(u);
 125         assert(u->load_state == UNIT_STUB);
 126
 127         s->timeout_start_usec = u->manager->default_timeout_start_usec;
 128         s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
 129         s->restart_usec = u->manager->default_restart_usec;
 130         s->type = _SERVICE_TYPE_INVALID;
 131
 132         watch_init(&s->watchdog_watch);
 133         watch_init(&s->timer_watch);
 134
 135 #ifdef HAVE_SYSV_COMPAT
 136         s->sysv_start_priority = -1;
 137         s->sysv_start_priority_from_rcnd = -1;
 138 #endif
 139         s->socket_fd = -1;
 140         s->guess_main_pid = true;
 141
 142         exec_context_init(&s->exec_context);
 143         kill_context_init(&s->kill_context);
 144         cgroup_context_init(&s->cgroup_context);
 145
 146         RATELIMIT_INIT(s->start_limit, 10*USEC_PER_SEC, 5);
 147
 148         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 149 }
 150
 151 static void service_unwatch_control_pid(Service *s) {
 152         assert(s);
 153
 154         if (s->control_pid <= 0)
 155                 return;
 156
 157         unit_unwatch_pid(UNIT(s), s->control_pid);
 158         s->control_pid = 0;
 159 }
 160
 161 static void service_unwatch_main_pid(Service *s) {
 162         assert(s);
 163
 164         if (s->main_pid <= 0)
 165                 return;
 166
 167         unit_unwatch_pid(UNIT(s), s->main_pid);
 168         s->main_pid = 0;
 169 }
 170
 171 static void service_unwatch_pid_file(Service *s) {
 172         if (!s->pid_file_pathspec)
 173                 return;
 174
 175         log_debug_unit(UNIT(s)->id, "Stopping watch for %s's PID file %s",
 176                        UNIT(s)->id, s->pid_file_pathspec->path);
 177         path_spec_unwatch(s->pid_file_pathspec, UNIT(s));
 178         path_spec_done(s->pid_file_pathspec);
 179         free(s->pid_file_pathspec);
 180         s->pid_file_pathspec = NULL;
 181 }
 182
 183 static int service_set_main_pid(Service *s, pid_t pid) {
 184         pid_t ppid;
 185
 186         assert(s);
 187
 188         if (pid <= 1)
 189                 return -EINVAL;
 190
 191         if (pid == getpid())
 192                 return -EINVAL;
 193
 194         if (s->main_pid == pid && s->main_pid_known)
 195                 return 0;
 196
 197         if (s->main_pid != pid) {
 198                 service_unwatch_main_pid(s);
 199                 exec_status_start(&s->main_exec_status, pid);
 200         }
 201
 202         s->main_pid = pid;
 203         s->main_pid_known = true;
 204
 205         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
 206                 log_warning_unit(UNIT(s)->id,
 207                                  "%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 208                                  UNIT(s)->id, (unsigned long) pid);
 209
 210                 s->main_pid_alien = true;
 211         } else
 212                 s->main_pid_alien = false;
 213
 214         return 0;
 215 }
 216
 217 static void service_close_socket_fd(Service *s) {
 218         assert(s);
 219
 220         if (s->socket_fd < 0)
 221                 return;
 222
 223         close_nointr_nofail(s->socket_fd);
 224         s->socket_fd = -1;
 225 }
 226
 227 static void service_connection_unref(Service *s) {
 228         assert(s);
 229
 230         if (!UNIT_ISSET(s->accept_socket))
 231                 return;
 232
 233         socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
 234         unit_ref_unset(&s->accept_socket);
 235 }
 236
 237 static void service_stop_watchdog(Service *s) {
 238         assert(s);
 239
 240         unit_unwatch_timer(UNIT(s), &s->watchdog_watch);
 241         s->watchdog_timestamp.realtime = 0;
 242         s->watchdog_timestamp.monotonic = 0;
 243 }
 244
 245 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
 246
 247 static void service_handle_watchdog(Service *s) {
 248         usec_t offset;
 249         int r;
 250
 251         assert(s);
 252
 253         if (s->watchdog_usec == 0)
 254                 return;
 255
 256         offset = now(CLOCK_MONOTONIC) - s->watchdog_timestamp.monotonic;
 257         if (offset >= s->watchdog_usec) {
 258                 log_error_unit(UNIT(s)->id, "%s watchdog timeout!", UNIT(s)->id);
 259                 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_WATCHDOG);
 260                 return;
 261         }
 262
 263         r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->watchdog_usec - offset, &s->watchdog_watch);
 264         if (r < 0)
 265                 log_warning_unit(UNIT(s)->id,
 266                                  "%s failed to install watchdog timer: %s",
 267                                  UNIT(s)->id, strerror(-r));
 268 }
 269
 270 static void service_reset_watchdog(Service *s) {
 271         assert(s);
 272
 273         dual_timestamp_get(&s->watchdog_timestamp);
 274         service_handle_watchdog(s);
 275 }
 276
 277 static void service_done(Unit *u) {
 278         Service *s = SERVICE(u);
 279
 280         assert(s);
 281
 282         free(s->pid_file);
 283         s->pid_file = NULL;
 284
 285 #ifdef HAVE_SYSV_COMPAT
 286         free(s->sysv_runlevels);
 287         s->sysv_runlevels = NULL;
 288 #endif
 289
 290         free(s->status_text);
 291         s->status_text = NULL;
 292
 293         cgroup_context_done(&s->cgroup_context);
 294         exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager));
 295         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 296         s->control_command = NULL;
 297         s->main_command = NULL;
 298
 299         set_free(s->restart_ignore_status.code);
 300         s->restart_ignore_status.code = NULL;
 301         set_free(s->restart_ignore_status.signal);
 302         s->restart_ignore_status.signal = NULL;
 303
 304         set_free(s->success_status.code);
 305         s->success_status.code = NULL;
 306         set_free(s->success_status.signal);
 307         s->success_status.signal = NULL;
 308
 309         /* This will leak a process, but at least no memory or any of
 310          * our resources */
 311         service_unwatch_main_pid(s);
 312         service_unwatch_control_pid(s);
 313         service_unwatch_pid_file(s);
 314
 315         if (s->bus_name)  {
 316                 unit_unwatch_bus_name(u, s->bus_name);
 317                 free(s->bus_name);
 318                 s->bus_name = NULL;
 319         }
 320
 321         service_close_socket_fd(s);
 322         service_connection_unref(s);
 323
 324         unit_ref_unset(&s->accept_socket);
 325
 326         service_stop_watchdog(s);
 327
 328         unit_unwatch_timer(u, &s->timer_watch);
 329 }
 330
 331 #ifdef HAVE_SYSV_COMPAT
 332 static char *sysv_translate_name(const char *name) {
 333         char *r;
 334
 335         r = new(char, strlen(name) + sizeof(".service"));
 336         if (!r)
 337                 return NULL;
 338
 339         if (endswith(name, ".sh"))
 340                 /* Drop .sh suffix */
 341                 strcpy(stpcpy(r, name) - 3, ".service");
 342         else
 343                 /* Normal init script name */
 344                 strcpy(stpcpy(r, name), ".service");
 345
 346         return r;
 347 }
 348
 349 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 350
 351         /* We silently ignore the $ prefix here. According to the LSB
 352          * spec it simply indicates whether something is a
 353          * standardized name or a distribution-specific one. Since we
 354          * just follow what already exists and do not introduce new
 355          * uses or names we don't care who introduced a new name. */
 356
 357         static const char * const table[] = {
 358                 /* LSB defined facilities */
 359                 "local_fs",             NULL,
 360                 "network",              SPECIAL_NETWORK_TARGET,
 361                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 362                 "portmap",              SPECIAL_RPCBIND_TARGET,
 363                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 364                 "syslog",               NULL,
 365                 "time",                 SPECIAL_TIME_SYNC_TARGET,
 366         };
 367
 368         unsigned i;
 369         char *r;
 370         const char *n;
 371
 372         assert(name);
 373         assert(_r);
 374
 375         n = *name == '$' ? name + 1 : name;
 376
 377         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 378
 379                 if (!streq(table[i], n))
 380                         continue;
 381
 382                 if (!table[i+1])
 383                         return 0;
 384
 385                 r = strdup(table[i+1]);
 386                 if (!r)
 387                         return log_oom();
 388
 389                 goto finish;
 390         }
 391
 392         /* If we don't know this name, fallback heuristics to figure
 393          * out whether something is a target or a service alias. */
 394
 395         if (*name == '$') {
 396                 if (!unit_prefix_is_valid(n))
 397                         return -EINVAL;
 398
 399                 /* Facilities starting with $ are most likely targets */
 400                 r = unit_name_build(n, NULL, ".target");
 401         } else if (filename && streq(name, filename))
 402                 /* Names equaling the file name of the services are redundant */
 403                 return 0;
 404         else
 405                 /* Everything else we assume to be normal service names */
 406                 r = sysv_translate_name(n);
 407
 408         if (!r)
 409                 return -ENOMEM;
 410
 411 finish:
 412         *_r = r;
 413
 414         return 1;
 415 }
 416
 417 static int sysv_fix_order(Service *s) {
 418         Unit *other;
 419         int r;
 420
 421         assert(s);
 422
 423         if (s->sysv_start_priority < 0)
 424                 return 0;
 425
 426         /* For each pair of services where at least one lacks a LSB
 427          * header, we use the start priority value to order things. */
 428
 429         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
 430                 Service *t;
 431                 UnitDependency d;
 432                 bool special_s, special_t;
 433
 434                 t = SERVICE(other);
 435
 436                 if (s == t)
 437                         continue;
 438
 439                 if (UNIT(t)->load_state != UNIT_LOADED)
 440                         continue;
 441
 442                 if (t->sysv_start_priority < 0)
 443                         continue;
 444
 445                 /* If both units have modern headers we don't care
 446                  * about the priorities */
 447                 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
 448                     (UNIT(t)->fragment_path || t->sysv_has_lsb))
 449                         continue;
 450
 451                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 452                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 453
 454                 if (special_t && !special_s)
 455                         d = UNIT_AFTER;
 456                 else if (special_s && !special_t)
 457                         d = UNIT_BEFORE;
 458                 else if (t->sysv_start_priority < s->sysv_start_priority)
 459                         d = UNIT_AFTER;
 460                 else if (t->sysv_start_priority > s->sysv_start_priority)
 461                         d = UNIT_BEFORE;
 462                 else
 463                         continue;
 464
 465                 /* FIXME: Maybe we should compare the name here lexicographically? */
 466
 467                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 468                         return r;
 469         }
 470
 471         return 0;
 472 }
 473
 474 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 475         ExecCommand *c;
 476
 477         if (!(c = new0(ExecCommand, 1)))
 478                 return NULL;
 479
 480         if (!(c->path = strdup(path))) {
 481                 free(c);
 482                 return NULL;
 483         }
 484
 485         if (!(c->argv = strv_new(path, arg1, NULL))) {
 486                 free(c->path);
 487                 free(c);
 488                 return NULL;
 489         }
 490
 491         return c;
 492 }
 493
 494 static int sysv_exec_commands(Service *s, const bool supports_reload) {
 495         ExecCommand *c;
 496
 497         assert(s);
 498         assert(s->is_sysv);
 499         assert(UNIT(s)->source_path);
 500
 501         c = exec_command_new(UNIT(s)->source_path, "start");
 502         if (!c)
 503                 return -ENOMEM;
 504         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 505
 506         c = exec_command_new(UNIT(s)->source_path, "stop");
 507         if (!c)
 508                 return -ENOMEM;
 509         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 510
 511         if (supports_reload) {
 512                 c = exec_command_new(UNIT(s)->source_path, "reload");
 513                 if (!c)
 514                         return -ENOMEM;
 515                 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 516         }
 517
 518         return 0;
 519 }
 520
 521 static bool usage_contains_reload(const char *line) {
 522         return (strcasestr(line, "{reload|") ||
 523                 strcasestr(line, "{reload}") ||
 524                 strcasestr(line, "{reload\"") ||
 525                 strcasestr(line, "|reload|") ||
 526                 strcasestr(line, "|reload}") ||
 527                 strcasestr(line, "|reload\""));
 528 }
 529
 530 static int service_load_sysv_path(Service *s, const char *path) {
 531         FILE *f;
 532         Unit *u;
 533         unsigned line = 0;
 534         int r;
 535         enum {
 536                 NORMAL,
 537                 DESCRIPTION,
 538                 LSB,
 539                 LSB_DESCRIPTION,
 540                 USAGE_CONTINUATION
 541         } state = NORMAL;
 542         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 543         struct stat st;
 544         bool supports_reload = false;
 545
 546         assert(s);
 547         assert(path);
 548
 549         u = UNIT(s);
 550
 551         f = fopen(path, "re");
 552         if (!f) {
 553                 r = errno == ENOENT ? 0 : -errno;
 554                 goto finish;
 555         }
 556
 557         if (fstat(fileno(f), &st) < 0) {
 558                 r = -errno;
 559                 goto finish;
 560         }
 561
 562         free(u->source_path);
 563         u->source_path = strdup(path);
 564         if (!u->source_path) {
 565                 r = -ENOMEM;
 566                 goto finish;
 567         }
 568         u->source_mtime = timespec_load(&st.st_mtim);
 569
 570         if (null_or_empty(&st)) {
 571                 u->load_state = UNIT_MASKED;
 572                 r = 0;
 573                 goto finish;
 574         }
 575
 576         s->is_sysv = true;
 577
 578         while (!feof(f)) {
 579                 char l[LINE_MAX], *t;
 580
 581                 if (!fgets(l, sizeof(l), f)) {
 582                         if (feof(f))
 583                                 break;
 584
 585                         r = -errno;
 586                         log_error_unit(u->id,
 587                                        "Failed to read configuration file '%s': %s",
 588                                        path, strerror(-r));
 589                         goto finish;
 590                 }
 591
 592                 line++;
 593
 594                 t = strstrip(l);
 595                 if (*t != '#') {
 596                         /* Try to figure out whether this init script supports
 597                          * the reload operation. This heuristic looks for
 598                          * "Usage" lines which include the reload option. */
 599                         if ( state == USAGE_CONTINUATION ||
 600                             (state == NORMAL && strcasestr(t, "usage"))) {
 601                                 if (usage_contains_reload(t)) {
 602                                         supports_reload = true;
 603                                         state = NORMAL;
 604                                 } else if (t[strlen(t)-1] == '\\')
 605                                         state = USAGE_CONTINUATION;
 606                                 else
 607                                         state = NORMAL;
 608                         }
 609
 610                         continue;
 611                 }
 612
 613                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 614                         state = LSB;
 615                         s->sysv_has_lsb = true;
 616                         continue;
 617                 }
 618
 619                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 620                         state = NORMAL;
 621                         continue;
 622                 }
 623
 624                 t++;
 625                 t += strspn(t, WHITESPACE);
 626
 627                 if (state == NORMAL) {
 628
 629                         /* Try to parse Red Hat style chkconfig headers */
 630
 631                         if (startswith_no_case(t, "chkconfig:")) {
 632                                 int start_priority;
 633                                 char runlevels[16], *k;
 634
 635                                 state = NORMAL;
 636
 637                                 if (sscanf(t+10, "%15s %i %*i",
 638                                            runlevels,
 639                                            &start_priority) != 2) {
 640
 641                                         log_warning_unit(u->id,
 642                                                          "[%s:%u] Failed to parse chkconfig line. Ignoring.",
 643                                                          path, line);
 644                                         continue;
 645                                 }
 646
 647                                 /* A start priority gathered from the
 648                                  * symlink farms is preferred over the
 649                                  * data from the LSB header. */
 650                                 if (start_priority < 0 || start_priority > 99)
 651                                         log_warning_unit(u->id,
 652                                                          "[%s:%u] Start priority out of range. Ignoring.",
 653                                                          path, line);
 654                                 else
 655                                         s->sysv_start_priority = start_priority;
 656
 657                                 char_array_0(runlevels);
 658                                 k = delete_chars(runlevels, WHITESPACE "-");
 659
 660                                 if (k[0]) {
 661                                         char *d;
 662
 663                                         if (!(d = strdup(k))) {
 664                                                 r = -ENOMEM;
 665                                                 goto finish;
 666                                         }
 667
 668                                         free(s->sysv_runlevels);
 669                                         s->sysv_runlevels = d;
 670                                 }
 671
 672                         } else if (startswith_no_case(t, "description:")) {
 673
 674                                 size_t k = strlen(t);
 675                                 char *d;
 676                                 const char *j;
 677
 678                                 if (t[k-1] == '\\') {
 679                                         state = DESCRIPTION;
 680                                         t[k-1] = 0;
 681                                 }
 682
 683                                 if ((j = strstrip(t+12)) && *j) {
 684                                         if (!(d = strdup(j))) {
 685                                                 r = -ENOMEM;
 686                                                 goto finish;
 687                                         }
 688                                 } else
 689                                         d = NULL;
 690
 691                                 free(chkconfig_description);
 692                                 chkconfig_description = d;
 693
 694                         } else if (startswith_no_case(t, "pidfile:")) {
 695
 696                                 char *fn;
 697
 698                                 state = NORMAL;
 699
 700                                 fn = strstrip(t+8);
 701                                 if (!path_is_absolute(fn)) {
 702                                         log_warning_unit(u->id,
 703                                                          "[%s:%u] PID file not absolute. Ignoring.",
 704                                                          path, line);
 705                                         continue;
 706                                 }
 707
 708                                 if (!(fn = strdup(fn))) {
 709                                         r = -ENOMEM;
 710                                         goto finish;
 711                                 }
 712
 713                                 free(s->pid_file);
 714                                 s->pid_file = fn;
 715                         }
 716
 717                 } else if (state == DESCRIPTION) {
 718
 719                         /* Try to parse Red Hat style description
 720                          * continuation */
 721
 722                         size_t k = strlen(t);
 723                         char *j;
 724
 725                         if (t[k-1] == '\\')
 726                                 t[k-1] = 0;
 727                         else
 728                                 state = NORMAL;
 729
 730                         if ((j = strstrip(t)) && *j) {
 731                                 char *d = NULL;
 732
 733                                 if (chkconfig_description)
 734                                         d = strjoin(chkconfig_description, " ", j, NULL);
 735                                 else
 736                                         d = strdup(j);
 737
 738                                 if (!d) {
 739                                         r = -ENOMEM;
 740                                         goto finish;
 741                                 }
 742
 743                                 free(chkconfig_description);
 744                                 chkconfig_description = d;
 745                         }
 746
 747                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 748
 749                         if (startswith_no_case(t, "Provides:")) {
 750                                 char *i, *w;
 751                                 size_t z;
 752
 753                                 state = LSB;
 754
 755                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 756                                         char *n, *m;
 757
 758                                         if (!(n = strndup(w, z))) {
 759                                                 r = -ENOMEM;
 760                                                 goto finish;
 761                                         }
 762
 763                                         r = sysv_translate_facility(n, path_get_file_name(path), &m);
 764                                         free(n);
 765
 766                                         if (r < 0)
 767                                                 goto finish;
 768
 769                                         if (r == 0)
 770                                                 continue;
 771
 772                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 773                                                 r = unit_merge_by_name(u, m);
 774                                         else
 775                                                 /* NB: SysV targets
 776                                                  * which are provided
 777                                                  * by a service are
 778                                                  * pulled in by the
 779                                                  * services, as an
 780                                                  * indication that the
 781                                                  * generic service is
 782                                                  * now available. This
 783                                                  * is strictly
 784                                                  * one-way. The
 785                                                  * targets do NOT pull
 786                                                  * in the SysV
 787                                                  * services! */
 788                                                 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
 789
 790                                         if (r < 0)
 791                                                 log_error_unit(u->id,
 792                                                                "[%s:%u] Failed to add LSB Provides name %s, ignoring: %s",
 793                                                                path, line, m, strerror(-r));
 794
 795                                         free(m);
 796                                 }
 797
 798                         } else if (startswith_no_case(t, "Required-Start:") ||
 799                                    startswith_no_case(t, "Should-Start:") ||
 800                                    startswith_no_case(t, "X-Start-Before:") ||
 801                                    startswith_no_case(t, "X-Start-After:")) {
 802                                 char *i, *w;
 803                                 size_t z;
 804
 805                                 state = LSB;
 806
 807                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 808                                         char *n, *m;
 809
 810                                         if (!(n = strndup(w, z))) {
 811                                                 r = -ENOMEM;
 812                                                 goto finish;
 813                                         }
 814
 815                                         r = sysv_translate_facility(n, path_get_file_name(path), &m);
 816                                         if (r < 0) {
 817                                                 log_error_unit(u->id,
 818                                                                "[%s:%u] Failed to translate LSB dependency %s, ignoring: %s",
 819                                                                path, line, n, strerror(-r));
 820                                                 free(n);
 821                                                 continue;
 822                                         }
 823
 824                                         free(n);
 825
 826                                         if (r == 0)
 827                                                 continue;
 828
 829                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 830
 831                                         if (r < 0)
 832                                                 log_error_unit(u->id, "[%s:%u] Failed to add dependency on %s, ignoring: %s",
 833                                                                path, line, m, strerror(-r));
 834
 835                                         free(m);
 836                                 }
 837                         } else if (startswith_no_case(t, "Default-Start:")) {
 838                                 char *k, *d;
 839
 840                                 state = LSB;
 841
 842                                 k = delete_chars(t+14, WHITESPACE "-");
 843
 844                                 if (k[0] != 0) {
 845                                         if (!(d = strdup(k))) {
 846                                                 r = -ENOMEM;
 847                                                 goto finish;
 848                                         }
 849
 850                                         free(s->sysv_runlevels);
 851                                         s->sysv_runlevels = d;
 852                                 }
 853
 854                         } else if (startswith_no_case(t, "Description:")) {
 855                                 char *d, *j;
 856
 857                                 state = LSB_DESCRIPTION;
 858
 859                                 if ((j = strstrip(t+12)) && *j) {
 860                                         if (!(d = strdup(j))) {
 861                                                 r = -ENOMEM;
 862                                                 goto finish;
 863                                         }
 864                                 } else
 865                                         d = NULL;
 866
 867                                 free(long_description);
 868                                 long_description = d;
 869
 870                         } else if (startswith_no_case(t, "Short-Description:")) {
 871                                 char *d, *j;
 872
 873                                 state = LSB;
 874
 875                                 if ((j = strstrip(t+18)) && *j) {
 876                                         if (!(d = strdup(j))) {
 877                                                 r = -ENOMEM;
 878                                                 goto finish;
 879                                         }
 880                                 } else
 881                                         d = NULL;
 882
 883                                 free(short_description);
 884                                 short_description = d;
 885
 886                         } else if (state == LSB_DESCRIPTION) {
 887
 888                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 889                                         char *j;
 890
 891                                         if ((j = strstrip(t)) && *j) {
 892                                                 char *d = NULL;
 893
 894                                                 if (long_description)
 895                                                         d = strjoin(long_description, " ", t, NULL);
 896                                                 else
 897                                                         d = strdup(j);
 898
 899                                                 if (!d) {
 900                                                         r = -ENOMEM;
 901                                                         goto finish;
 902                                                 }
 903
 904                                                 free(long_description);
 905                                                 long_description = d;
 906                                         }
 907
 908                                 } else
 909                                         state = LSB;
 910                         }
 911                 }
 912         }
 913
 914         if ((r = sysv_exec_commands(s, supports_reload)) < 0)
 915                 goto finish;
 916
 917         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 918                 /* If there a runlevels configured for this service
 919                  * but none of the standard ones, then we assume this
 920                  * is some special kind of service (which might be
 921                  * needed for early boot) and don't create any links
 922                  * to it. */
 923
 924                 UNIT(s)->default_dependencies = false;
 925
 926                 /* Don't timeout special services during boot (like fsck) */
 927                 s->timeout_start_usec = 0;
 928                 s->timeout_stop_usec = 0;
 929         } else {
 930                 s->timeout_start_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 931                 s->timeout_stop_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 932         }
 933
 934         /* Special setting for all SysV services */
 935         s->type = SERVICE_FORKING;
 936         s->remain_after_exit = !s->pid_file;
 937         s->guess_main_pid = false;
 938         s->restart = SERVICE_RESTART_NO;
 939         s->exec_context.ignore_sigpipe = false;
 940         s->kill_context.kill_mode = KILL_PROCESS;
 941
 942         /* We use the long description only if
 943          * no short description is set. */
 944
 945         if (short_description)
 946                 description = short_description;
 947         else if (chkconfig_description)
 948                 description = chkconfig_description;
 949         else if (long_description)
 950                 description = long_description;
 951         else
 952                 description = NULL;
 953
 954         if (description) {
 955                 char *d;
 956
 957                 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
 958                         r = -ENOMEM;
 959                         goto finish;
 960                 }
 961
 962                 u->description = d;
 963         }
 964
 965         /* The priority that has been set in /etc/rcN.d/ hierarchies
 966          * takes precedence over what is stored as default in the LSB
 967          * header */
 968         if (s->sysv_start_priority_from_rcnd >= 0)
 969                 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
 970
 971         u->load_state = UNIT_LOADED;
 972         r = 0;
 973
 974 finish:
 975
 976         if (f)
 977                 fclose(f);
 978
 979         free(short_description);
 980         free(long_description);
 981         free(chkconfig_description);
 982
 983         return r;
 984 }
 985
 986 static int service_load_sysv_name(Service *s, const char *name) {
 987         char **p;
 988
 989         assert(s);
 990         assert(name);
 991
 992         /* For SysV services we strip the *.sh suffixes. */
 993         if (endswith(name, ".sh.service"))
 994                 return -ENOENT;
 995
 996         STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
 997                 char *path;
 998                 int r;
 999
1000                 path = strjoin(*p, "/", name, NULL);
1001                 if (!path)
1002                         return -ENOMEM;
1003
1004                 assert(endswith(path, ".service"));
1005                 path[strlen(path)-8] = 0;
1006
1007                 r = service_load_sysv_path(s, path);
1008
1009                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1010                         /* Try *.sh source'able init scripts */
1011                         strcat(path, ".sh");
1012                         r = service_load_sysv_path(s, path);
1013                 }
1014                 free(path);
1015
1016                 if (r < 0)
1017                         return r;
1018
1019                 if (UNIT(s)->load_state != UNIT_STUB)
1020                         break;
1021         }
1022
1023         return 0;
1024 }
1025
1026 static int service_load_sysv(Service *s) {
1027         const char *t;
1028         Iterator i;
1029         int r;
1030
1031         assert(s);
1032
1033         /* Load service data from SysV init scripts, preferably with
1034          * LSB headers ... */
1035
1036         if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1037                 return 0;
1038
1039         if ((t = UNIT(s)->id))
1040                 if ((r = service_load_sysv_name(s, t)) < 0)
1041                         return r;
1042
1043         if (UNIT(s)->load_state == UNIT_STUB)
1044                 SET_FOREACH(t, UNIT(s)->names, i) {
1045                         if (t == UNIT(s)->id)
1046                                 continue;
1047
1048                         if ((r = service_load_sysv_name(s, t)) < 0)
1049                                 return r;
1050
1051                         if (UNIT(s)->load_state != UNIT_STUB)
1052                                 break;
1053                 }
1054
1055         return 0;
1056 }
1057 #endif
1058
1059 static int service_verify(Service *s) {
1060         assert(s);
1061
1062         if (UNIT(s)->load_state != UNIT_LOADED)
1063                 return 0;
1064
1065         if (!s->exec_command[SERVICE_EXEC_START]) {
1066                 log_error_unit(UNIT(s)->id,
1067                                "%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1068                 return -EINVAL;
1069         }
1070
1071         if (s->type != SERVICE_ONESHOT &&
1072             s->exec_command[SERVICE_EXEC_START]->command_next) {
1073                 log_error_unit(UNIT(s)->id,
1074                                "%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1075                 return -EINVAL;
1076         }
1077
1078         if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
1079                 log_error_unit(UNIT(s)->id,
1080                                 "%s has Restart setting other than no, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1081                 return -EINVAL;
1082         }
1083
1084         if (s->type == SERVICE_DBUS && !s->bus_name) {
1085                 log_error_unit(UNIT(s)->id,
1086                                "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1087                 return -EINVAL;
1088         }
1089
1090         if (s->bus_name && s->type != SERVICE_DBUS)
1091                 log_warning_unit(UNIT(s)->id,
1092                                  "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
1093
1094         if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
1095                 log_error_unit(UNIT(s)->id,
1096                                "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
1097                 return -EINVAL;
1098         }
1099
1100         return 0;
1101 }
1102
1103 static int service_add_default_dependencies(Service *s) {
1104         int r;
1105
1106         assert(s);
1107
1108         /* Add a number of automatic dependencies useful for the
1109          * majority of services. */
1110
1111         /* First, pull in base system */
1112         if (UNIT(s)->manager->running_as == SYSTEMD_SYSTEM) {
1113                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1114                                                       SPECIAL_BASIC_TARGET, NULL, true);
1115                 if (r < 0)
1116                         return r;
1117
1118         } else if (UNIT(s)->manager->running_as == SYSTEMD_USER) {
1119                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1120                                                       SPECIAL_SOCKETS_TARGET, NULL, true);
1121                 if (r < 0)
1122                         return r;
1123
1124                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1125                                                       SPECIAL_TIMERS_TARGET, NULL, true);
1126                 if (r < 0)
1127                         return r;
1128
1129                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1130                                                       SPECIAL_PATHS_TARGET, NULL, true);
1131                 if (r < 0)
1132                         return r;
1133         }
1134
1135         /* Second, activate normal shutdown */
1136         r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS,
1137                                               SPECIAL_SHUTDOWN_TARGET, NULL, true);
1138         return r;
1139 }
1140
1141 static void service_fix_output(Service *s) {
1142         assert(s);
1143
1144         /* If nothing has been explicitly configured, patch default
1145          * output in. If input is socket/tty we avoid this however,
1146          * since in that case we want output to default to the same
1147          * place as we read input from. */
1148
1149         if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1150             s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1151             s->exec_context.std_input == EXEC_INPUT_NULL)
1152                 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1153
1154         if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1155             s->exec_context.std_input == EXEC_INPUT_NULL)
1156                 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1157 }
1158
1159 static int service_load(Unit *u) {
1160         int r;
1161         Service *s = SERVICE(u);
1162
1163         assert(s);
1164
1165         /* Load a .service file */
1166         r = unit_load_fragment(u);
1167         if (r < 0)
1168                 return r;
1169
1170 #ifdef HAVE_SYSV_COMPAT
1171         /* Load a classic init script as a fallback, if we couldn't find anything */
1172         if (u->load_state == UNIT_STUB) {
1173                 r = service_load_sysv(s);
1174                 if (r < 0)
1175                         return r;
1176         }
1177 #endif
1178
1179         /* Still nothing found? Then let's give up */
1180         if (u->load_state == UNIT_STUB)
1181                 return -ENOENT;
1182
1183         /* This is a new unit? Then let's add in some extras */
1184         if (u->load_state == UNIT_LOADED) {
1185
1186                 /* We were able to load something, then let's add in
1187                  * the dropin directories. */
1188                 r = unit_load_dropin(u);
1189                 if (r < 0)
1190                         return r;
1191
1192                 if (s->type == _SERVICE_TYPE_INVALID)
1193                         s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
1194
1195                 /* Oneshot services have disabled start timeout by default */
1196                 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
1197                         s->timeout_start_usec = 0;
1198
1199                 service_fix_output(s);
1200
1201                 r = unit_add_exec_dependencies(u, &s->exec_context);
1202                 if (r < 0)
1203                         return r;
1204
1205                 r = unit_add_default_slice(u);
1206                 if (r < 0)
1207                         return r;
1208
1209 #ifdef HAVE_SYSV_COMPAT
1210                 r = sysv_fix_order(s);
1211                 if (r < 0)
1212                         return r;
1213 #endif
1214
1215                 if (s->bus_name)
1216                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1217                                 return r;
1218
1219                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1220                         s->notify_access = NOTIFY_MAIN;
1221
1222                 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1223                         s->notify_access = NOTIFY_MAIN;
1224
1225                 if (s->type == SERVICE_DBUS || s->bus_name) {
1226                         r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES,
1227                                                               SPECIAL_DBUS_SOCKET, NULL, true);
1228                         if (r < 0)
1229                                 return r;
1230                 }
1231
1232                 if (UNIT(s)->default_dependencies) {
1233                         r = service_add_default_dependencies(s);
1234                         if (r < 0)
1235                                 return r;
1236                 }
1237
1238                 r = unit_exec_context_defaults(u, &s->exec_context);
1239                 if (r < 0)
1240                         return r;
1241         }
1242
1243         return service_verify(s);
1244 }
1245
1246 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1247
1248         ServiceExecCommand c;
1249         Service *s = SERVICE(u);
1250         const char *prefix2;
1251         _cleanup_free_ char *p2 = NULL;
1252
1253         assert(s);
1254
1255         p2 = strappend(prefix, "\t");
1256         prefix2 = p2 ? p2 : prefix;
1257
1258         fprintf(f,
1259                 "%sService State: %s\n"
1260                 "%sResult: %s\n"
1261                 "%sReload Result: %s\n"
1262                 "%sPermissionsStartOnly: %s\n"
1263                 "%sRootDirectoryStartOnly: %s\n"
1264                 "%sRemainAfterExit: %s\n"
1265                 "%sGuessMainPID: %s\n"
1266                 "%sType: %s\n"
1267                 "%sRestart: %s\n"
1268                 "%sNotifyAccess: %s\n",
1269                 prefix, service_state_to_string(s->state),
1270                 prefix, service_result_to_string(s->result),
1271                 prefix, service_result_to_string(s->reload_result),
1272                 prefix, yes_no(s->permissions_start_only),
1273                 prefix, yes_no(s->root_directory_start_only),
1274                 prefix, yes_no(s->remain_after_exit),
1275                 prefix, yes_no(s->guess_main_pid),
1276                 prefix, service_type_to_string(s->type),
1277                 prefix, service_restart_to_string(s->restart),
1278                 prefix, notify_access_to_string(s->notify_access));
1279
1280         if (s->control_pid > 0)
1281                 fprintf(f,
1282                         "%sControl PID: %lu\n",
1283                         prefix, (unsigned long) s->control_pid);
1284
1285         if (s->main_pid > 0)
1286                 fprintf(f,
1287                         "%sMain PID: %lu\n"
1288                         "%sMain PID Known: %s\n"
1289                         "%sMain PID Alien: %s\n",
1290                         prefix, (unsigned long) s->main_pid,
1291                         prefix, yes_no(s->main_pid_known),
1292                         prefix, yes_no(s->main_pid_alien));
1293
1294         if (s->pid_file)
1295                 fprintf(f,
1296                         "%sPIDFile: %s\n",
1297                         prefix, s->pid_file);
1298
1299         if (s->bus_name)
1300                 fprintf(f,
1301                         "%sBusName: %s\n"
1302                         "%sBus Name Good: %s\n",
1303                         prefix, s->bus_name,
1304                         prefix, yes_no(s->bus_name_good));
1305
1306         kill_context_dump(&s->kill_context, f, prefix);
1307         exec_context_dump(&s->exec_context, f, prefix);
1308
1309         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1310
1311                 if (!s->exec_command[c])
1312                         continue;
1313
1314                 fprintf(f, "%s-> %s:\n",
1315                         prefix, service_exec_command_to_string(c));
1316
1317                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1318         }
1319
1320 #ifdef HAVE_SYSV_COMPAT
1321         if (s->is_sysv)
1322                 fprintf(f,
1323                         "%sSysV Init Script has LSB Header: %s\n"
1324                         "%sSysVEnabled: %s\n",
1325                         prefix, yes_no(s->sysv_has_lsb),
1326                         prefix, yes_no(s->sysv_enabled));
1327
1328         if (s->sysv_start_priority >= 0)
1329                 fprintf(f,
1330                         "%sSysVStartPriority: %i\n",
1331                         prefix, s->sysv_start_priority);
1332
1333         if (s->sysv_runlevels)
1334                 fprintf(f, "%sSysVRunLevels: %s\n",
1335                         prefix, s->sysv_runlevels);
1336 #endif
1337
1338         if (s->status_text)
1339                 fprintf(f, "%sStatus Text: %s\n",
1340                         prefix, s->status_text);
1341 }
1342
1343 static int service_load_pid_file(Service *s, bool may_warn) {
1344         _cleanup_free_ char *k = NULL;
1345         int r;
1346         pid_t pid;
1347
1348         assert(s);
1349
1350         if (!s->pid_file)
1351                 return -ENOENT;
1352
1353         r = read_one_line_file(s->pid_file, &k);
1354         if (r < 0) {
1355                 if (may_warn)
1356                         log_info_unit(UNIT(s)->id,
1357                                       "PID file %s not readable (yet?) after %s.",
1358                                       s->pid_file, service_state_to_string(s->state));
1359                 return r;
1360         }
1361
1362         r = parse_pid(k, &pid);
1363         if (r < 0) {
1364                 if (may_warn)
1365                         log_info_unit(UNIT(s)->id,
1366                                       "Failed to read PID from file %s: %s",
1367                                       s->pid_file, strerror(-r));
1368                 return r;
1369         }
1370
1371         if (kill(pid, 0) < 0 && errno != EPERM) {
1372                 if (may_warn)
1373                         log_info_unit(UNIT(s)->id,
1374                                       "PID %lu read from file %s does not exist.",
1375                                       (unsigned long) pid, s->pid_file);
1376                 return -ESRCH;
1377         }
1378
1379         if (s->main_pid_known) {
1380                 if (pid == s->main_pid)
1381                         return 0;
1382
1383                 log_debug_unit(UNIT(s)->id,
1384                                "Main PID changing: %lu -> %lu",
1385                                (unsigned long) s->main_pid, (unsigned long) pid);
1386                 service_unwatch_main_pid(s);
1387                 s->main_pid_known = false;
1388         } else
1389                 log_debug_unit(UNIT(s)->id,
1390                                "Main PID loaded: %lu", (unsigned long) pid);
1391
1392         r = service_set_main_pid(s, pid);
1393         if (r < 0)
1394                 return r;
1395
1396         r = unit_watch_pid(UNIT(s), pid);
1397         if (r < 0) {
1398                 /* FIXME: we need to do something here */
1399                 log_warning_unit(UNIT(s)->id,
1400                                  "Failed to watch PID %lu from service %s",
1401                                  (unsigned long) pid, UNIT(s)->id);
1402                 return r;
1403         }
1404
1405         return 0;
1406 }
1407
1408 static int service_search_main_pid(Service *s) {
1409         pid_t pid;
1410         int r;
1411
1412         assert(s);
1413
1414         /* If we know it anyway, don't ever fallback to unreliable
1415          * heuristics */
1416         if (s->main_pid_known)
1417                 return 0;
1418
1419         if (!s->guess_main_pid)
1420                 return 0;
1421
1422         assert(s->main_pid <= 0);
1423
1424         pid = unit_search_main_pid(UNIT(s));
1425         if (pid <= 0)
1426                 return -ENOENT;
1427
1428         log_debug_unit(UNIT(s)->id,
1429                        "Main PID guessed: %lu", (unsigned long) pid);
1430         r = service_set_main_pid(s, pid);
1431         if (r < 0)
1432                 return r;
1433
1434         r = unit_watch_pid(UNIT(s), pid);
1435         if (r < 0)
1436                 /* FIXME: we need to do something here */
1437                 log_warning_unit(UNIT(s)->id,
1438                                  "Failed to watch PID %lu from service %s",
1439                                  (unsigned long) pid, UNIT(s)->id);
1440                 return r;
1441
1442         return 0;
1443 }
1444
1445 static void service_set_state(Service *s, ServiceState state) {
1446         ServiceState old_state;
1447         const UnitActiveState *table;
1448         assert(s);
1449
1450         table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1451
1452         old_state = s->state;
1453         s->state = state;
1454
1455         service_unwatch_pid_file(s);
1456
1457         if (state != SERVICE_START_PRE &&
1458             state != SERVICE_START &&
1459             state != SERVICE_START_POST &&
1460             state != SERVICE_RELOAD &&
1461             state != SERVICE_STOP &&
1462             state != SERVICE_STOP_SIGTERM &&
1463             state != SERVICE_STOP_SIGKILL &&
1464             state != SERVICE_STOP_POST &&
1465             state != SERVICE_FINAL_SIGTERM &&
1466             state != SERVICE_FINAL_SIGKILL &&
1467             state != SERVICE_AUTO_RESTART)
1468                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1469
1470         if (state != SERVICE_START &&
1471             state != SERVICE_START_POST &&
1472             state != SERVICE_RUNNING &&
1473             state != SERVICE_RELOAD &&
1474             state != SERVICE_STOP &&
1475             state != SERVICE_STOP_SIGTERM &&
1476             state != SERVICE_STOP_SIGKILL) {
1477                 service_unwatch_main_pid(s);
1478                 s->main_command = NULL;
1479         }
1480
1481         if (state != SERVICE_START_PRE &&
1482             state != SERVICE_START &&
1483             state != SERVICE_START_POST &&
1484             state != SERVICE_RELOAD &&
1485             state != SERVICE_STOP &&
1486             state != SERVICE_STOP_SIGTERM &&
1487             state != SERVICE_STOP_SIGKILL &&
1488             state != SERVICE_STOP_POST &&
1489             state != SERVICE_FINAL_SIGTERM &&
1490             state != SERVICE_FINAL_SIGKILL) {
1491                 service_unwatch_control_pid(s);
1492                 s->control_command = NULL;
1493                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1494         }
1495
1496         if (state != SERVICE_START_PRE &&
1497             state != SERVICE_START &&
1498             state != SERVICE_START_POST &&
1499             state != SERVICE_RUNNING &&
1500             state != SERVICE_RELOAD &&
1501             state != SERVICE_STOP &&
1502             state != SERVICE_STOP_SIGTERM &&
1503             state != SERVICE_STOP_SIGKILL &&
1504             state != SERVICE_STOP_POST &&
1505             state != SERVICE_FINAL_SIGTERM &&
1506             state != SERVICE_FINAL_SIGKILL &&
1507             !(state == SERVICE_DEAD && UNIT(s)->job)) {
1508                 service_close_socket_fd(s);
1509                 service_connection_unref(s);
1510         }
1511
1512         if (state == SERVICE_STOP || state == SERVICE_STOP_SIGTERM)
1513                 service_stop_watchdog(s);
1514
1515         /* For the inactive states unit_notify() will trim the cgroup,
1516          * but for exit we have to do that ourselves... */
1517         if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1518                 unit_destroy_cgroup(UNIT(s));
1519
1520         if (old_state != state)
1521                 log_debug_unit(UNIT(s)->id,
1522                                "%s changed %s -> %s", UNIT(s)->id,
1523                                service_state_to_string(old_state),
1524                                service_state_to_string(state));
1525
1526         unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1527         s->reload_result = SERVICE_SUCCESS;
1528 }
1529
1530 static int service_coldplug(Unit *u) {
1531         Service *s = SERVICE(u);
1532         int r;
1533
1534         assert(s);
1535         assert(s->state == SERVICE_DEAD);
1536
1537         if (s->deserialized_state != s->state) {
1538
1539                 if (s->deserialized_state == SERVICE_START_PRE ||
1540                     s->deserialized_state == SERVICE_START ||
1541                     s->deserialized_state == SERVICE_START_POST ||
1542                     s->deserialized_state == SERVICE_RELOAD ||
1543                     s->deserialized_state == SERVICE_STOP ||
1544                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1545                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1546                     s->deserialized_state == SERVICE_STOP_POST ||
1547                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1548                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1549                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1550
1551                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_start_usec > 0) {
1552                                 usec_t k;
1553
1554                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_start_usec;
1555
1556                                 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, k, &s->timer_watch);
1557                                 if (r < 0)
1558                                         return r;
1559                         }
1560                 }
1561
1562                 if ((s->deserialized_state == SERVICE_START &&
1563                      (s->type == SERVICE_FORKING ||
1564                       s->type == SERVICE_DBUS ||
1565                       s->type == SERVICE_ONESHOT ||
1566                       s->type == SERVICE_NOTIFY)) ||
1567                     s->deserialized_state == SERVICE_START_POST ||
1568                     s->deserialized_state == SERVICE_RUNNING ||
1569                     s->deserialized_state == SERVICE_RELOAD ||
1570                     s->deserialized_state == SERVICE_STOP ||
1571                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1572                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1573                         if (s->main_pid > 0) {
1574                                 r = unit_watch_pid(UNIT(s), s->main_pid);
1575                                 if (r < 0)
1576                                         return r;
1577                         }
1578
1579                 if (s->deserialized_state == SERVICE_START_PRE ||
1580                     s->deserialized_state == SERVICE_START ||
1581                     s->deserialized_state == SERVICE_START_POST ||
1582                     s->deserialized_state == SERVICE_RELOAD ||
1583                     s->deserialized_state == SERVICE_STOP ||
1584                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1585                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1586                     s->deserialized_state == SERVICE_STOP_POST ||
1587                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1588                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1589                         if (s->control_pid > 0) {
1590                                 r = unit_watch_pid(UNIT(s), s->control_pid);
1591                                 if (r < 0)
1592                                         return r;
1593                         }
1594
1595                 if (s->deserialized_state == SERVICE_START_POST ||
1596                     s->deserialized_state == SERVICE_RUNNING)
1597                         service_handle_watchdog(s);
1598
1599                 service_set_state(s, s->deserialized_state);
1600         }
1601         return 0;
1602 }
1603
1604 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1605         Iterator i;
1606         int r;
1607         int *rfds = NULL;
1608         unsigned rn_fds = 0;
1609         Unit *u;
1610
1611         assert(s);
1612         assert(fds);
1613         assert(n_fds);
1614
1615         if (s->socket_fd >= 0)
1616                 return 0;
1617
1618         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1619                 int *cfds;
1620                 unsigned cn_fds;
1621                 Socket *sock;
1622
1623                 if (u->type != UNIT_SOCKET)
1624                         continue;
1625
1626                 sock = SOCKET(u);
1627
1628                 r = socket_collect_fds(sock, &cfds, &cn_fds);
1629                 if (r < 0)
1630                         goto fail;
1631
1632                 if (!cfds)
1633                         continue;
1634
1635                 if (!rfds) {
1636                         rfds = cfds;
1637                         rn_fds = cn_fds;
1638                 } else {
1639                         int *t;
1640
1641                         t = new(int, rn_fds+cn_fds);
1642                         if (!t) {
1643                                 free(cfds);
1644                                 r = -ENOMEM;
1645                                 goto fail;
1646                         }
1647
1648                         memcpy(t, rfds, rn_fds * sizeof(int));
1649                         memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1650                         free(rfds);
1651                         free(cfds);
1652
1653                         rfds = t;
1654                         rn_fds = rn_fds+cn_fds;
1655                 }
1656         }
1657
1658         *fds = rfds;
1659         *n_fds = rn_fds;
1660
1661         return 0;
1662
1663 fail:
1664         free(rfds);
1665
1666         return r;
1667 }
1668
1669 static int service_spawn(
1670                 Service *s,
1671                 ExecCommand *c,
1672                 bool timeout,
1673                 bool pass_fds,
1674                 bool apply_permissions,
1675                 bool apply_chroot,
1676                 bool apply_tty_stdin,
1677                 bool set_notify_socket,
1678                 bool is_control,
1679                 pid_t *_pid) {
1680
1681         pid_t pid;
1682         int r;
1683         int *fds = NULL;
1684         _cleanup_free_ int *fdsbuf = NULL;
1685         unsigned n_fds = 0, n_env = 0;
1686         _cleanup_strv_free_ char
1687                 **argv = NULL, **final_env = NULL, **our_env = NULL;
1688         const char *path;
1689
1690         assert(s);
1691         assert(c);
1692         assert(_pid);
1693
1694         unit_realize_cgroup(UNIT(s));
1695
1696         if (pass_fds ||
1697             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1698             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1699             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1700
1701                 if (s->socket_fd >= 0) {
1702                         fds = &s->socket_fd;
1703                         n_fds = 1;
1704                 } else {
1705                         r = service_collect_fds(s, &fdsbuf, &n_fds);
1706                         if (r < 0)
1707                                 goto fail;
1708
1709                         fds = fdsbuf;
1710                 }
1711         }
1712
1713         if (timeout && s->timeout_start_usec) {
1714                 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true,
1715                                      s->timeout_start_usec, &s->timer_watch);
1716                 if (r < 0)
1717                         goto fail;
1718         } else
1719                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1720
1721         r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
1722         if (r < 0)
1723                 goto fail;
1724
1725         our_env = new0(char*, 5);
1726         if (!our_env) {
1727                 r = -ENOMEM;
1728                 goto fail;
1729         }
1730
1731         if (set_notify_socket)
1732                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1733                         r = -ENOMEM;
1734                         goto fail;
1735                 }
1736
1737         if (s->main_pid > 0)
1738                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1739                         r = -ENOMEM;
1740                         goto fail;
1741                 }
1742
1743         if (s->watchdog_usec > 0)
1744                 if (asprintf(our_env + n_env++, "WATCHDOG_USEC=%llu", (unsigned long long) s->watchdog_usec) < 0) {
1745                         r = -ENOMEM;
1746                         goto fail;
1747                 }
1748
1749         if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
1750                 if (asprintf(our_env + n_env++, "MANAGERPID=%lu", (unsigned long) getpid()) < 0) {
1751                         r = -ENOMEM;
1752                         goto fail;
1753                 }
1754
1755         final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1756         if (!final_env) {
1757                 r = -ENOMEM;
1758                 goto fail;
1759         }
1760
1761         if (is_control && UNIT(s)->cgroup_path) {
1762                 path = strappenda(UNIT(s)->cgroup_path, "/control");
1763                 cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1764         } else
1765                 path = UNIT(s)->cgroup_path;
1766
1767         r = exec_spawn(c,
1768                        argv,
1769                        &s->exec_context,
1770                        fds, n_fds,
1771                        final_env,
1772                        apply_permissions,
1773                        apply_chroot,
1774                        apply_tty_stdin,
1775                        UNIT(s)->manager->confirm_spawn,
1776                        UNIT(s)->manager->cgroup_supported,
1777                        path,
1778                        UNIT(s)->id,
1779                        s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
1780                        &pid);
1781         if (r < 0)
1782                 goto fail;
1783
1784         r = unit_watch_pid(UNIT(s), pid);
1785         if (r < 0)
1786                 /* FIXME: we need to do something here */
1787                 goto fail;
1788
1789         *_pid = pid;
1790
1791         return 0;
1792
1793 fail:
1794         if (timeout)
1795                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1796
1797         return r;
1798 }
1799
1800 static int main_pid_good(Service *s) {
1801         assert(s);
1802
1803         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1804          * don't know */
1805
1806         /* If we know the pid file, then lets just check if it is
1807          * still valid */
1808         if (s->main_pid_known) {
1809
1810                 /* If it's an alien child let's check if it is still
1811                  * alive ... */
1812                 if (s->main_pid_alien && s->main_pid > 0)
1813                         return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1814
1815                 /* .. otherwise assume we'll get a SIGCHLD for it,
1816                  * which we really should wait for to collect exit
1817                  * status and code */
1818                 return s->main_pid > 0;
1819         }
1820
1821         /* We don't know the pid */
1822         return -EAGAIN;
1823 }
1824
1825 _pure_ static int control_pid_good(Service *s) {
1826         assert(s);
1827
1828         return s->control_pid > 0;
1829 }
1830
1831 static int cgroup_good(Service *s) {
1832         int r;
1833
1834         assert(s);
1835
1836         if (!UNIT(s)->cgroup_path)
1837                 return 0;
1838
1839         r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
1840         if (r < 0)
1841                 return r;
1842
1843         return !r;
1844 }
1845
1846 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1847         int r;
1848         assert(s);
1849
1850         if (f != SERVICE_SUCCESS)
1851                 s->result = f;
1852
1853         service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1854
1855         if (allow_restart &&
1856             !s->forbid_restart &&
1857             (s->restart == SERVICE_RESTART_ALWAYS ||
1858              (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1859              (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1860              (s->restart == SERVICE_RESTART_ON_WATCHDOG && s->result == SERVICE_FAILURE_WATCHDOG) ||
1861              (s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
1862                                                          s->result == SERVICE_FAILURE_CORE_DUMP))) &&
1863             (s->result != SERVICE_FAILURE_EXIT_CODE ||
1864              !set_contains(s->restart_ignore_status.code, INT_TO_PTR(s->main_exec_status.status))) &&
1865             (s->result != SERVICE_FAILURE_SIGNAL ||
1866              !set_contains(s->restart_ignore_status.signal, INT_TO_PTR(s->main_exec_status.status)))
1867                 ) {
1868
1869                 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->restart_usec, &s->timer_watch);
1870                 if (r < 0)
1871                         goto fail;
1872
1873                 service_set_state(s, SERVICE_AUTO_RESTART);
1874         }
1875
1876         s->forbid_restart = false;
1877
1878         /* we want fresh tmpdirs in case service is started again immediately */
1879         exec_context_tmp_dirs_done(&s->exec_context);
1880
1881         /* Try to delete the pid file. At this point it will be
1882          * out-of-date, and some software might be confused by it, so
1883          * let's remove it. */
1884         if (s->pid_file)
1885                 unlink_noerrno(s->pid_file);
1886
1887         return;
1888
1889 fail:
1890         log_warning_unit(UNIT(s)->id,
1891                          "%s failed to run install restart timer: %s",
1892                          UNIT(s)->id, strerror(-r));
1893         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1894 }
1895
1896 static void service_enter_stop_post(Service *s, ServiceResult f) {
1897         int r;
1898         assert(s);
1899
1900         if (f != SERVICE_SUCCESS)
1901                 s->result = f;
1902
1903         service_unwatch_control_pid(s);
1904
1905         s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1906         if (s->control_command) {
1907                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1908
1909                 r = service_spawn(s,
1910                                   s->control_command,
1911                                   true,
1912                                   false,
1913                                   !s->permissions_start_only,
1914                                   !s->root_directory_start_only,
1915                                   true,
1916                                   false,
1917                                   true,
1918                                   &s->control_pid);
1919                 if (r < 0)
1920                         goto fail;
1921
1922
1923                 service_set_state(s, SERVICE_STOP_POST);
1924         } else
1925                 service_enter_dead(s, SERVICE_SUCCESS, true);
1926
1927         return;
1928
1929 fail:
1930         log_warning_unit(UNIT(s)->id,
1931                          "%s failed to run 'stop-post' task: %s",
1932                          UNIT(s)->id, strerror(-r));
1933         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1934 }
1935
1936 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1937         int r;
1938
1939         assert(s);
1940
1941         if (f != SERVICE_SUCCESS)
1942                 s->result = f;
1943
1944         r = unit_kill_context(
1945                         UNIT(s),
1946                         &s->kill_context,
1947                         state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM,
1948                         s->main_pid,
1949                         s->control_pid,
1950                         s->main_pid_alien);
1951         if (r < 0)
1952                 goto fail;
1953
1954         if (r > 0) {
1955                 if (s->timeout_stop_usec > 0) {
1956                         r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true,
1957                                              s->timeout_stop_usec, &s->timer_watch);
1958                         if (r < 0)
1959                                 goto fail;
1960                 }
1961
1962                 service_set_state(s, state);
1963         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1964                 service_enter_stop_post(s, SERVICE_SUCCESS);
1965         else
1966                 service_enter_dead(s, SERVICE_SUCCESS, true);
1967
1968         return;
1969
1970 fail:
1971         log_warning_unit(UNIT(s)->id,
1972                          "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1973
1974         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1975                 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1976         else
1977                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1978 }
1979
1980 static void service_enter_stop(Service *s, ServiceResult f) {
1981         int r;
1982
1983         assert(s);
1984
1985         if (f != SERVICE_SUCCESS)
1986                 s->result = f;
1987
1988         service_unwatch_control_pid(s);
1989
1990         s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1991         if (s->control_command) {
1992                 s->control_command_id = SERVICE_EXEC_STOP;
1993
1994                 r = service_spawn(s,
1995                                   s->control_command,
1996                                   true,
1997                                   false,
1998                                   !s->permissions_start_only,
1999                                   !s->root_directory_start_only,
2000                                   false,
2001                                   false,
2002                                   true,
2003                                   &s->control_pid);
2004                 if (r < 0)
2005                         goto fail;
2006
2007                 service_set_state(s, SERVICE_STOP);
2008         } else
2009                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2010
2011         return;
2012
2013 fail:
2014         log_warning_unit(UNIT(s)->id,
2015                          "%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2016         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2017 }
2018
2019 static void service_enter_running(Service *s, ServiceResult f) {
2020         int main_pid_ok, cgroup_ok;
2021         assert(s);
2022
2023         if (f != SERVICE_SUCCESS)
2024                 s->result = f;
2025
2026         main_pid_ok = main_pid_good(s);
2027         cgroup_ok = cgroup_good(s);
2028
2029         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2030             (s->bus_name_good || s->type != SERVICE_DBUS))
2031                 service_set_state(s, SERVICE_RUNNING);
2032         else if (s->remain_after_exit)
2033                 service_set_state(s, SERVICE_EXITED);
2034         else
2035                 service_enter_stop(s, SERVICE_SUCCESS);
2036 }
2037
2038 static void service_enter_start_post(Service *s) {
2039         int r;
2040         assert(s);
2041
2042         service_unwatch_control_pid(s);
2043
2044         if (s->watchdog_usec > 0)
2045                 service_reset_watchdog(s);
2046
2047         s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
2048         if (s->control_command) {
2049                 s->control_command_id = SERVICE_EXEC_START_POST;
2050
2051                 r = service_spawn(s,
2052                                   s->control_command,
2053                                   true,
2054                                   false,
2055                                   !s->permissions_start_only,
2056                                   !s->root_directory_start_only,
2057                                   false,
2058                                   false,
2059                                   true,
2060                                   &s->control_pid);
2061                 if (r < 0)
2062                         goto fail;
2063
2064                 service_set_state(s, SERVICE_START_POST);
2065         } else
2066                 service_enter_running(s, SERVICE_SUCCESS);
2067
2068         return;
2069
2070 fail:
2071         log_warning_unit(UNIT(s)->id,
2072                          "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2073         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2074 }
2075
2076 static void service_kill_control_processes(Service *s) {
2077         char *p;
2078
2079         if (!UNIT(s)->cgroup_path)
2080                 return;
2081
2082         p = strappenda(UNIT(s)->cgroup_path, "/control");
2083         cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL);
2084 }
2085
2086 static void service_enter_start(Service *s) {
2087         ExecCommand *c;
2088         pid_t pid;
2089         int r;
2090
2091         assert(s);
2092
2093         assert(s->exec_command[SERVICE_EXEC_START]);
2094         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2095
2096         service_unwatch_control_pid(s);
2097         service_unwatch_main_pid(s);
2098
2099         /* We want to ensure that nobody leaks processes from
2100          * START_PRE here, so let's go on a killing spree, People
2101          * should not spawn long running processes from START_PRE. */
2102         service_kill_control_processes(s);
2103
2104         if (s->type == SERVICE_FORKING) {
2105                 s->control_command_id = SERVICE_EXEC_START;
2106                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2107
2108                 s->main_command = NULL;
2109         } else {
2110                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2111                 s->control_command = NULL;
2112
2113                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2114         }
2115
2116         r = service_spawn(s,
2117                           c,
2118                           s->type == SERVICE_FORKING || s->type == SERVICE_DBUS ||
2119                             s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
2120                           true,
2121                           true,
2122                           true,
2123                           true,
2124                           s->notify_access != NOTIFY_NONE,
2125                           false,
2126                           &pid);
2127         if (r < 0)
2128                 goto fail;
2129
2130         if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
2131                 /* For simple services we immediately start
2132                  * the START_POST binaries. */
2133
2134                 service_set_main_pid(s, pid);
2135                 service_enter_start_post(s);
2136
2137         } else  if (s->type == SERVICE_FORKING) {
2138
2139                 /* For forking services we wait until the start
2140                  * process exited. */
2141
2142                 s->control_pid = pid;
2143                 service_set_state(s, SERVICE_START);
2144
2145         } else if (s->type == SERVICE_ONESHOT ||
2146                    s->type == SERVICE_DBUS ||
2147                    s->type == SERVICE_NOTIFY) {
2148
2149                 /* For oneshot services we wait until the start
2150                  * process exited, too, but it is our main process. */
2151
2152                 /* For D-Bus services we know the main pid right away,
2153                  * but wait for the bus name to appear on the
2154                  * bus. Notify services are similar. */
2155
2156                 service_set_main_pid(s, pid);
2157                 service_set_state(s, SERVICE_START);
2158         } else
2159                 assert_not_reached("Unknown service type");
2160
2161         return;
2162
2163 fail:
2164         log_warning_unit(UNIT(s)->id,
2165                          "%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2166         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2167 }
2168
2169 static void service_enter_start_pre(Service *s) {
2170         int r;
2171
2172         assert(s);
2173
2174         service_unwatch_control_pid(s);
2175
2176         s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
2177         if (s->control_command) {
2178                 /* Before we start anything, let's clear up what might
2179                  * be left from previous runs. */
2180                 service_kill_control_processes(s);
2181
2182                 s->control_command_id = SERVICE_EXEC_START_PRE;
2183
2184                 r = service_spawn(s,
2185                                   s->control_command,
2186                                   true,
2187                                   false,
2188                                   !s->permissions_start_only,
2189                                   !s->root_directory_start_only,
2190                                   true,
2191                                   false,
2192                                   true,
2193                                   &s->control_pid);
2194                 if (r < 0)
2195                         goto fail;
2196
2197                 service_set_state(s, SERVICE_START_PRE);
2198         } else
2199                 service_enter_start(s);
2200
2201         return;
2202
2203 fail:
2204         log_warning_unit(UNIT(s)->id,
2205                          "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2206         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2207 }
2208
2209 static void service_enter_restart(Service *s) {
2210         int r;
2211         DBusError error;
2212
2213         assert(s);
2214         dbus_error_init(&error);
2215
2216         if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2217                 /* Don't restart things if we are going down anyway */
2218                 log_info_unit(UNIT(s)->id,
2219                               "Stop job pending for unit, delaying automatic restart.");
2220
2221                 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->restart_usec, &s->timer_watch);
2222                 if (r < 0)
2223                         goto fail;
2224
2225                 return;
2226         }
2227
2228         /* Any units that are bound to this service must also be
2229          * restarted. We use JOB_RESTART (instead of the more obvious
2230          * JOB_START) here so that those dependency jobs will be added
2231          * as well. */
2232         r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
2233         if (r < 0)
2234                 goto fail;
2235
2236         /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2237          * it will be canceled as part of the service_stop() call that
2238          * is executed as part of JOB_RESTART. */
2239
2240         log_debug_unit(UNIT(s)->id,
2241                        "%s scheduled restart job.", UNIT(s)->id);
2242         return;
2243
2244 fail:
2245         log_warning_unit(UNIT(s)->id,
2246                          "%s failed to schedule restart job: %s",
2247                          UNIT(s)->id, bus_error(&error, -r));
2248         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2249
2250         dbus_error_free(&error);
2251 }
2252
2253 static void service_enter_reload(Service *s) {
2254         int r;
2255
2256         assert(s);
2257
2258         service_unwatch_control_pid(s);
2259
2260         s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2261         if (s->control_command) {
2262                 s->control_command_id = SERVICE_EXEC_RELOAD;
2263
2264                 r = service_spawn(s,
2265                                   s->control_command,
2266                                   true,
2267                                   false,
2268                                   !s->permissions_start_only,
2269                                   !s->root_directory_start_only,
2270                                   false,
2271                                   false,
2272                                   true,
2273                                   &s->control_pid);
2274                 if (r < 0)
2275                         goto fail;
2276
2277                 service_set_state(s, SERVICE_RELOAD);
2278         } else
2279                 service_enter_running(s, SERVICE_SUCCESS);
2280
2281         return;
2282
2283 fail:
2284         log_warning_unit(UNIT(s)->id,
2285                          "%s failed to run 'reload' task: %s",
2286                          UNIT(s)->id, strerror(-r));
2287         s->reload_result = SERVICE_FAILURE_RESOURCES;
2288         service_enter_running(s, SERVICE_SUCCESS);
2289 }
2290
2291 static void service_run_next_control(Service *s) {
2292         int r;
2293
2294         assert(s);
2295         assert(s->control_command);
2296         assert(s->control_command->command_next);
2297
2298         assert(s->control_command_id != SERVICE_EXEC_START);
2299
2300         s->control_command = s->control_command->command_next;
2301         service_unwatch_control_pid(s);
2302
2303         r = service_spawn(s,
2304                           s->control_command,
2305                           true,
2306                           false,
2307                           !s->permissions_start_only,
2308                           !s->root_directory_start_only,
2309                           s->control_command_id == SERVICE_EXEC_START_PRE ||
2310                           s->control_command_id == SERVICE_EXEC_STOP_POST,
2311                           false,
2312                           true,
2313                           &s->control_pid);
2314         if (r < 0)
2315                 goto fail;
2316
2317         return;
2318
2319 fail:
2320         log_warning_unit(UNIT(s)->id,
2321                          "%s failed to run next control task: %s",
2322                          UNIT(s)->id, strerror(-r));
2323
2324         if (s->state == SERVICE_START_PRE)
2325                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2326         else if (s->state == SERVICE_STOP)
2327                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2328         else if (s->state == SERVICE_STOP_POST)
2329                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2330         else if (s->state == SERVICE_RELOAD) {
2331                 s->reload_result = SERVICE_FAILURE_RESOURCES;
2332                 service_enter_running(s, SERVICE_SUCCESS);
2333         } else
2334                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2335 }
2336
2337 static void service_run_next_main(Service *s) {
2338         pid_t pid;
2339         int r;
2340
2341         assert(s);
2342         assert(s->main_command);
2343         assert(s->main_command->command_next);
2344         assert(s->type == SERVICE_ONESHOT);
2345
2346         s->main_command = s->main_command->command_next;
2347         service_unwatch_main_pid(s);
2348
2349         r = service_spawn(s,
2350                           s->main_command,
2351                           true,
2352                           true,
2353                           true,
2354                           true,
2355                           true,
2356                           s->notify_access != NOTIFY_NONE,
2357                           false,
2358                           &pid);
2359         if (r < 0)
2360                 goto fail;
2361
2362         service_set_main_pid(s, pid);
2363
2364         return;
2365
2366 fail:
2367         log_warning_unit(UNIT(s)->id,
2368                          "%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2369         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2370 }
2371
2372 static int service_start_limit_test(Service *s) {
2373         assert(s);
2374
2375         if (ratelimit_test(&s->start_limit))
2376                 return 0;
2377
2378         switch (s->start_limit_action) {
2379
2380         case SERVICE_START_LIMIT_NONE:
2381                 log_warning_unit(UNIT(s)->id,
2382                                  "%s start request repeated too quickly, refusing to start.",
2383                                  UNIT(s)->id);
2384                 break;
2385
2386         case SERVICE_START_LIMIT_REBOOT: {
2387                 DBusError error;
2388                 int r;
2389
2390                 dbus_error_init(&error);
2391
2392                 log_warning_unit(UNIT(s)->id,
2393                                  "%s start request repeated too quickly, rebooting.", UNIT(s)->id);
2394
2395                 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START,
2396                                             SPECIAL_REBOOT_TARGET, JOB_REPLACE,
2397                                             true, &error, NULL);
2398                 if (r < 0) {
2399                         log_error_unit(UNIT(s)->id,
2400                                        "Failed to reboot: %s.", bus_error(&error, r));
2401                         dbus_error_free(&error);
2402                 }
2403
2404                 break;
2405         }
2406
2407         case SERVICE_START_LIMIT_REBOOT_FORCE:
2408                 log_warning_unit(UNIT(s)->id,
2409                                  "%s start request repeated too quickly, forcibly rebooting.", UNIT(s)->id);
2410                 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2411                 break;
2412
2413         case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
2414                 log_warning_unit(UNIT(s)->id,
2415                                  "%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
2416                 sync();
2417                 reboot(RB_AUTOBOOT);
2418                 break;
2419
2420         default:
2421                 log_error_unit(UNIT(s)->id,
2422                                "start limit action=%i", s->start_limit_action);
2423                 assert_not_reached("Unknown StartLimitAction.");
2424         }
2425
2426         return -ECANCELED;
2427 }
2428
2429 static int service_start(Unit *u) {
2430         Service *s = SERVICE(u);
2431         int r;
2432
2433         assert(s);
2434
2435         /* We cannot fulfill this request right now, try again later
2436          * please! */
2437         if (s->state == SERVICE_STOP ||
2438             s->state == SERVICE_STOP_SIGTERM ||
2439             s->state == SERVICE_STOP_SIGKILL ||
2440             s->state == SERVICE_STOP_POST ||
2441             s->state == SERVICE_FINAL_SIGTERM ||
2442             s->state == SERVICE_FINAL_SIGKILL)
2443                 return -EAGAIN;
2444
2445         /* Already on it! */
2446         if (s->state == SERVICE_START_PRE ||
2447             s->state == SERVICE_START ||
2448             s->state == SERVICE_START_POST)
2449                 return 0;
2450
2451         /* A service that will be restarted must be stopped first to
2452          * trigger BindsTo and/or OnFailure dependencies. If a user
2453          * does not want to wait for the holdoff time to elapse, the
2454          * service should be manually restarted, not started. We
2455          * simply return EAGAIN here, so that any start jobs stay
2456          * queued, and assume that the auto restart timer will
2457          * eventually trigger the restart. */
2458         if (s->state == SERVICE_AUTO_RESTART)
2459                 return -EAGAIN;
2460
2461         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
2462
2463         /* Make sure we don't enter a busy loop of some kind. */
2464         r = service_start_limit_test(s);
2465         if (r < 0) {
2466                 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
2467                 return r;
2468         }
2469
2470         s->result = SERVICE_SUCCESS;
2471         s->reload_result = SERVICE_SUCCESS;
2472         s->main_pid_known = false;
2473         s->main_pid_alien = false;
2474         s->forbid_restart = false;
2475
2476         service_enter_start_pre(s);
2477         return 0;
2478 }
2479
2480 static int service_stop(Unit *u) {
2481         Service *s = SERVICE(u);
2482
2483         assert(s);
2484
2485         /* Don't create restart jobs from here. */
2486         s->forbid_restart = true;
2487
2488         /* Already on it */
2489         if (s->state == SERVICE_STOP ||
2490             s->state == SERVICE_STOP_SIGTERM ||
2491             s->state == SERVICE_STOP_SIGKILL ||
2492             s->state == SERVICE_STOP_POST ||
2493             s->state == SERVICE_FINAL_SIGTERM ||
2494             s->state == SERVICE_FINAL_SIGKILL)
2495                 return 0;
2496
2497         /* A restart will be scheduled or is in progress. */
2498         if (s->state == SERVICE_AUTO_RESTART) {
2499                 service_set_state(s, SERVICE_DEAD);
2500                 return 0;
2501         }
2502
2503         /* If there's already something running we go directly into
2504          * kill mode. */
2505         if (s->state == SERVICE_START_PRE ||
2506             s->state == SERVICE_START ||
2507             s->state == SERVICE_START_POST ||
2508             s->state == SERVICE_RELOAD) {
2509                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2510                 return 0;
2511         }
2512
2513         assert(s->state == SERVICE_RUNNING ||
2514                s->state == SERVICE_EXITED);
2515
2516         service_enter_stop(s, SERVICE_SUCCESS);
2517         return 0;
2518 }
2519
2520 static int service_reload(Unit *u) {
2521         Service *s = SERVICE(u);
2522
2523         assert(s);
2524
2525         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2526
2527         service_enter_reload(s);
2528         return 0;
2529 }
2530
2531 _pure_ static bool service_can_reload(Unit *u) {
2532         Service *s = SERVICE(u);
2533
2534         assert(s);
2535
2536         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2537 }
2538
2539 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2540         Service *s = SERVICE(u);
2541
2542         assert(u);
2543         assert(f);
2544         assert(fds);
2545
2546         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2547         unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2548         unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2549
2550         if (s->control_pid > 0)
2551                 unit_serialize_item_format(u, f, "control-pid", "%lu",
2552                                            (unsigned long) s->control_pid);
2553
2554         if (s->main_pid_known && s->main_pid > 0)
2555                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2556
2557         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2558
2559         if (s->status_text)
2560                 unit_serialize_item(u, f, "status-text", s->status_text);
2561
2562         /* FIXME: There's a minor uncleanliness here: if there are
2563          * multiple commands attached here, we will start from the
2564          * first one again */
2565         if (s->control_command_id >= 0)
2566                 unit_serialize_item(u, f, "control-command",
2567                                     service_exec_command_to_string(s->control_command_id));
2568
2569         if (s->socket_fd >= 0) {
2570                 int copy;
2571
2572                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2573                         return copy;
2574
2575                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2576         }
2577
2578         if (s->main_exec_status.pid > 0) {
2579                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu",
2580                                            (unsigned long) s->main_exec_status.pid);
2581                 dual_timestamp_serialize(f, "main-exec-status-start",
2582                                          &s->main_exec_status.start_timestamp);
2583                 dual_timestamp_serialize(f, "main-exec-status-exit",
2584                                          &s->main_exec_status.exit_timestamp);
2585
2586                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2587                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
2588                                                    s->main_exec_status.code);
2589                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
2590                                                    s->main_exec_status.status);
2591                 }
2592         }
2593         if (dual_timestamp_is_set(&s->watchdog_timestamp))
2594                 dual_timestamp_serialize(f, "watchdog-timestamp",
2595                                          &s->watchdog_timestamp);
2596
2597         if (s->exec_context.tmp_dir)
2598                 unit_serialize_item(u, f, "tmp-dir", s->exec_context.tmp_dir);
2599
2600         if (s->exec_context.var_tmp_dir)
2601                 unit_serialize_item(u, f, "var-tmp-dir", s->exec_context.var_tmp_dir);
2602
2603         if (s->forbid_restart)
2604                 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2605
2606         return 0;
2607 }
2608
2609 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2610         Service *s = SERVICE(u);
2611
2612         assert(u);
2613         assert(key);
2614         assert(value);
2615         assert(fds);
2616
2617         if (streq(key, "state")) {
2618                 ServiceState state;
2619
2620                 state = service_state_from_string(value);
2621                 if (state < 0)
2622                         log_debug_unit(u->id, "Failed to parse state value %s", value);
2623                 else
2624                         s->deserialized_state = state;
2625         } else if (streq(key, "result")) {
2626                 ServiceResult f;
2627
2628                 f = service_result_from_string(value);
2629                 if (f < 0)
2630                         log_debug_unit(u->id, "Failed to parse result value %s", value);
2631                 else if (f != SERVICE_SUCCESS)
2632                         s->result = f;
2633
2634         } else if (streq(key, "reload-result")) {
2635                 ServiceResult f;
2636
2637                 f = service_result_from_string(value);
2638                 if (f < 0)
2639                         log_debug_unit(u->id, "Failed to parse reload result value %s", value);
2640                 else if (f != SERVICE_SUCCESS)
2641                         s->reload_result = f;
2642
2643         } else if (streq(key, "control-pid")) {
2644                 pid_t pid;
2645
2646                 if (parse_pid(value, &pid) < 0)
2647                         log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
2648                 else
2649                         s->control_pid = pid;
2650         } else if (streq(key, "main-pid")) {
2651                 pid_t pid;
2652
2653                 if (parse_pid(value, &pid) < 0)
2654                         log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
2655                 else {
2656                         service_set_main_pid(s, pid);
2657                         unit_watch_pid(UNIT(s), pid);
2658                 }
2659         } else if (streq(key, "main-pid-known")) {
2660                 int b;
2661
2662                 b = parse_boolean(value);
2663                 if (b < 0)
2664                         log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
2665                 else
2666                         s->main_pid_known = b;
2667         } else if (streq(key, "status-text")) {
2668                 char *t;
2669
2670                 t = strdup(value);
2671                 if (!t)
2672                         log_oom();
2673                 else {
2674                         free(s->status_text);
2675                         s->status_text = t;
2676                 }
2677
2678         } else if (streq(key, "control-command")) {
2679                 ServiceExecCommand id;
2680
2681                 id = service_exec_command_from_string(value);
2682                 if (id < 0)
2683                         log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
2684                 else {
2685                         s->control_command_id = id;
2686                         s->control_command = s->exec_command[id];
2687                 }
2688         } else if (streq(key, "socket-fd")) {
2689                 int fd;
2690
2691                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2692                         log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
2693                 else {
2694
2695                         if (s->socket_fd >= 0)
2696                                 close_nointr_nofail(s->socket_fd);
2697                         s->socket_fd = fdset_remove(fds, fd);
2698                 }
2699         } else if (streq(key, "main-exec-status-pid")) {
2700                 pid_t pid;
2701
2702                 if (parse_pid(value, &pid) < 0)
2703                         log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
2704                 else
2705                         s->main_exec_status.pid = pid;
2706         } else if (streq(key, "main-exec-status-code")) {
2707                 int i;
2708
2709                 if (safe_atoi(value, &i) < 0)
2710                         log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
2711                 else
2712                         s->main_exec_status.code = i;
2713         } else if (streq(key, "main-exec-status-status")) {
2714                 int i;
2715
2716                 if (safe_atoi(value, &i) < 0)
2717                         log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
2718                 else
2719                         s->main_exec_status.status = i;
2720         } else if (streq(key, "main-exec-status-start"))
2721                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2722         else if (streq(key, "main-exec-status-exit"))
2723                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2724         else if (streq(key, "watchdog-timestamp"))
2725                 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2726         else if (streq(key, "tmp-dir")) {
2727                 char *t;
2728
2729                 t = strdup(value);
2730                 if (!t)
2731                         return log_oom();
2732
2733                 s->exec_context.tmp_dir = t;
2734         } else if (streq(key, "var-tmp-dir")) {
2735                 char *t;
2736
2737                 t = strdup(value);
2738                 if (!t)
2739                         return log_oom();
2740
2741                 s->exec_context.var_tmp_dir = t;
2742         } else if (streq(key, "forbid-restart")) {
2743                 int b;
2744
2745                 b = parse_boolean(value);
2746                 if (b < 0)
2747                         log_debug_unit(u->id, "Failed to parse forbid-restart value %s", value);
2748                 else
2749                         s->forbid_restart = b;
2750         } else
2751                 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
2752
2753         return 0;
2754 }
2755
2756 _pure_ static UnitActiveState service_active_state(Unit *u) {
2757         const UnitActiveState *table;
2758
2759         assert(u);
2760
2761         table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2762
2763         return table[SERVICE(u)->state];
2764 }
2765
2766 static const char *service_sub_state_to_string(Unit *u) {
2767         assert(u);
2768
2769         return service_state_to_string(SERVICE(u)->state);
2770 }
2771
2772 static bool service_check_gc(Unit *u) {
2773         Service *s = SERVICE(u);
2774
2775         assert(s);
2776
2777         /* Never clean up services that still have a process around,
2778          * even if the service is formally dead. */
2779         if (cgroup_good(s) > 0 ||
2780             main_pid_good(s) > 0 ||
2781             control_pid_good(s) > 0)
2782                 return true;
2783
2784 #ifdef HAVE_SYSV_COMPAT
2785         if (s->is_sysv)
2786                 return true;
2787 #endif
2788
2789         return false;
2790 }
2791
2792 _pure_ static bool service_check_snapshot(Unit *u) {
2793         Service *s = SERVICE(u);
2794
2795         assert(s);
2796
2797         return !s->got_socket_fd;
2798 }
2799
2800 static int service_retry_pid_file(Service *s) {
2801         int r;
2802
2803         assert(s->pid_file);
2804         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2805
2806         r = service_load_pid_file(s, false);
2807         if (r < 0)
2808                 return r;
2809
2810         service_unwatch_pid_file(s);
2811
2812         service_enter_running(s, SERVICE_SUCCESS);
2813         return 0;
2814 }
2815
2816 static int service_watch_pid_file(Service *s) {
2817         int r;
2818
2819         log_debug_unit(UNIT(s)->id,
2820                        "Setting watch for %s's PID file %s",
2821                        UNIT(s)->id, s->pid_file_pathspec->path);
2822         r = path_spec_watch(s->pid_file_pathspec, UNIT(s));
2823         if (r < 0)
2824                 goto fail;
2825
2826         /* the pidfile might have appeared just before we set the watch */
2827         log_debug_unit(UNIT(s)->id,
2828                        "Trying to read %s's PID file %s in case it changed",
2829                        UNIT(s)->id, s->pid_file_pathspec->path);
2830         service_retry_pid_file(s);
2831
2832         return 0;
2833 fail:
2834         log_error_unit(UNIT(s)->id,
2835                        "Failed to set a watch for %s's PID file %s: %s",
2836                        UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2837         service_unwatch_pid_file(s);
2838         return r;
2839 }
2840
2841 static int service_demand_pid_file(Service *s) {
2842         PathSpec *ps;
2843
2844         assert(s->pid_file);
2845         assert(!s->pid_file_pathspec);
2846
2847         ps = new0(PathSpec, 1);
2848         if (!ps)
2849                 return -ENOMEM;
2850
2851         ps->path = strdup(s->pid_file);
2852         if (!ps->path) {
2853                 free(ps);
2854                 return -ENOMEM;
2855         }
2856
2857         path_kill_slashes(ps->path);
2858
2859         /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2860          * keep their PID file open all the time. */
2861         ps->type = PATH_MODIFIED;
2862         ps->inotify_fd = -1;
2863
2864         s->pid_file_pathspec = ps;
2865
2866         return service_watch_pid_file(s);
2867 }
2868
2869 static void service_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
2870         Service *s = SERVICE(u);
2871
2872         assert(s);
2873         assert(fd >= 0);
2874         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2875         assert(s->pid_file_pathspec);
2876         assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2877
2878         log_debug_unit(u->id, "inotify event for %s", u->id);
2879
2880         if (path_spec_fd_event(s->pid_file_pathspec, events) < 0)
2881                 goto fail;
2882
2883         if (service_retry_pid_file(s) == 0)
2884                 return;
2885
2886         if (service_watch_pid_file(s) < 0)
2887                 goto fail;
2888
2889         return;
2890 fail:
2891         service_unwatch_pid_file(s);
2892         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2893 }
2894
2895 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2896         Service *s = SERVICE(u);
2897         ServiceResult f;
2898
2899         assert(s);
2900         assert(pid >= 0);
2901
2902         if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2903                                      is_clean_exit_lsb(code, status, &s->success_status))
2904                 f = SERVICE_SUCCESS;
2905         else if (code == CLD_EXITED)
2906                 f = SERVICE_FAILURE_EXIT_CODE;
2907         else if (code == CLD_KILLED)
2908                 f = SERVICE_FAILURE_SIGNAL;
2909         else if (code == CLD_DUMPED)
2910                 f = SERVICE_FAILURE_CORE_DUMP;
2911         else
2912                 assert_not_reached("Unknown code");
2913
2914         if (s->main_pid == pid) {
2915                 /* Forking services may occasionally move to a new PID.
2916                  * As long as they update the PID file before exiting the old
2917                  * PID, they're fine. */
2918                 if (service_load_pid_file(s, false) == 0)
2919                         return;
2920
2921                 s->main_pid = 0;
2922                 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2923
2924                 if (s->main_command) {
2925                         /* If this is not a forking service than the
2926                          * main process got started and hence we copy
2927                          * the exit status so that it is recorded both
2928                          * as main and as control process exit
2929                          * status */
2930
2931                         s->main_command->exec_status = s->main_exec_status;
2932
2933                         if (s->main_command->ignore)
2934                                 f = SERVICE_SUCCESS;
2935                 } else if (s->exec_command[SERVICE_EXEC_START]) {
2936
2937                         /* If this is a forked process, then we should
2938                          * ignore the return value if this was
2939                          * configured for the starter process */
2940
2941                         if (s->exec_command[SERVICE_EXEC_START]->ignore)
2942                                 f = SERVICE_SUCCESS;
2943                 }
2944
2945                 log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2946                            u->id,
2947                            "MESSAGE=%s: main process exited, code=%s, status=%i/%s",
2948                                   u->id, sigchld_code_to_string(code), status,
2949                                   strna(code == CLD_EXITED
2950                                         ? exit_status_to_string(status, EXIT_STATUS_FULL)
2951                                         : signal_to_string(status)),
2952                            "EXIT_CODE=%s", sigchld_code_to_string(code),
2953                            "EXIT_STATUS=%i", status,
2954                            NULL);
2955
2956                 if (f != SERVICE_SUCCESS)
2957                         s->result = f;
2958
2959                 if (s->main_command &&
2960                     s->main_command->command_next &&
2961                     f == SERVICE_SUCCESS) {
2962
2963                         /* There is another command to *
2964                          * execute, so let's do that. */
2965
2966                         log_debug_unit(u->id,
2967                                        "%s running next main command for state %s",
2968                                        u->id, service_state_to_string(s->state));
2969                         service_run_next_main(s);
2970
2971                 } else {
2972
2973                         /* The service exited, so the service is officially
2974                          * gone. */
2975                         s->main_command = NULL;
2976
2977                         switch (s->state) {
2978
2979                         case SERVICE_START_POST:
2980                         case SERVICE_RELOAD:
2981                         case SERVICE_STOP:
2982                                 /* Need to wait until the operation is
2983                                  * done */
2984                                 break;
2985
2986                         case SERVICE_START:
2987                                 if (s->type == SERVICE_ONESHOT) {
2988                                         /* This was our main goal, so let's go on */
2989                                         if (f == SERVICE_SUCCESS)
2990                                                 service_enter_start_post(s);
2991                                         else
2992                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2993                                         break;
2994                                 }
2995
2996                                 /* Fall through */
2997
2998                         case SERVICE_RUNNING:
2999                                 service_enter_running(s, f);
3000                                 break;
3001
3002                         case SERVICE_STOP_SIGTERM:
3003                         case SERVICE_STOP_SIGKILL:
3004
3005                                 if (!control_pid_good(s))
3006                                         service_enter_stop_post(s, f);
3007
3008                                 /* If there is still a control process, wait for that first */
3009                                 break;
3010
3011                         default:
3012                                 assert_not_reached("Uh, main process died at wrong time.");
3013                         }
3014                 }
3015
3016         } else if (s->control_pid == pid) {
3017                 s->control_pid = 0;
3018
3019                 if (s->control_command) {
3020                         exec_status_exit(&s->control_command->exec_status,
3021                                          &s->exec_context, pid, code, status);
3022
3023                         if (s->control_command->ignore)
3024                                 f = SERVICE_SUCCESS;
3025                 }
3026
3027                 log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
3028                               "%s: control process exited, code=%s status=%i",
3029                               u->id, sigchld_code_to_string(code), status);
3030
3031                 if (f != SERVICE_SUCCESS)
3032                         s->result = f;
3033
3034                 /* Immediately get rid of the cgroup, so that the
3035                  * kernel doesn't delay the cgroup empty messages for
3036                  * the service cgroup any longer than necessary */
3037                 service_kill_control_processes(s);
3038
3039                 if (s->control_command &&
3040                     s->control_command->command_next &&
3041                     f == SERVICE_SUCCESS) {
3042
3043                         /* There is another command to *
3044                          * execute, so let's do that. */
3045
3046                         log_debug_unit(u->id,
3047                                        "%s running next control command for state %s",
3048                                        u->id, service_state_to_string(s->state));
3049                         service_run_next_control(s);
3050
3051                 } else {
3052                         /* No further commands for this step, so let's
3053                          * figure out what to do next */
3054
3055                         s->control_command = NULL;
3056                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3057
3058                         log_debug_unit(u->id,
3059                                        "%s got final SIGCHLD for state %s",
3060                                        u->id, service_state_to_string(s->state));
3061
3062                         switch (s->state) {
3063
3064                         case SERVICE_START_PRE:
3065                                 if (f == SERVICE_SUCCESS)
3066                                         service_enter_start(s);
3067                                 else
3068                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3069                                 break;
3070
3071                         case SERVICE_START:
3072                                 if (s->type != SERVICE_FORKING)
3073                                         /* Maybe spurious event due to a reload that changed the type? */
3074                                         break;
3075
3076                                 if (f != SERVICE_SUCCESS) {
3077                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3078                                         break;
3079                                 }
3080
3081                                 if (s->pid_file) {
3082                                         bool has_start_post;
3083                                         int r;
3084
3085                                         /* Let's try to load the pid file here if we can.
3086                                          * The PID file might actually be created by a START_POST
3087                                          * script. In that case don't worry if the loading fails. */
3088
3089                                         has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3090                                         r = service_load_pid_file(s, !has_start_post);
3091                                         if (!has_start_post && r < 0) {
3092                                                 r = service_demand_pid_file(s);
3093                                                 if (r < 0 || !cgroup_good(s))
3094                                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3095                                                 break;
3096                                         }
3097                                 } else
3098                                         service_search_main_pid(s);
3099
3100                                 service_enter_start_post(s);
3101                                 break;
3102
3103                         case SERVICE_START_POST:
3104                                 if (f != SERVICE_SUCCESS) {
3105                                         service_enter_stop(s, f);
3106                                         break;
3107                                 }
3108
3109                                 if (s->pid_file) {
3110                                         int r;
3111
3112                                         r = service_load_pid_file(s, true);
3113                                         if (r < 0) {
3114                                                 r = service_demand_pid_file(s);
3115                                                 if (r < 0 || !cgroup_good(s))
3116                                                         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3117                                                 break;
3118                                         }
3119                                 } else
3120                                         service_search_main_pid(s);
3121
3122                                 service_enter_running(s, SERVICE_SUCCESS);
3123                                 break;
3124
3125                         case SERVICE_RELOAD:
3126                                 if (f == SERVICE_SUCCESS) {
3127                                         service_load_pid_file(s, true);
3128                                         service_search_main_pid(s);
3129                                 }
3130
3131                                 s->reload_result = f;
3132                                 service_enter_running(s, SERVICE_SUCCESS);
3133                                 break;
3134
3135                         case SERVICE_STOP:
3136                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3137                                 break;
3138
3139                         case SERVICE_STOP_SIGTERM:
3140                         case SERVICE_STOP_SIGKILL:
3141                                 if (main_pid_good(s) <= 0)
3142                                         service_enter_stop_post(s, f);
3143
3144                                 /* If there is still a service
3145                                  * process around, wait until
3146                                  * that one quit, too */
3147                                 break;
3148
3149                         case SERVICE_STOP_POST:
3150                         case SERVICE_FINAL_SIGTERM:
3151                         case SERVICE_FINAL_SIGKILL:
3152                                 service_enter_dead(s, f, true);
3153                                 break;
3154
3155                         default:
3156                                 assert_not_reached("Uh, control process died at wrong time.");
3157                         }
3158                 }
3159         }
3160
3161         /* Notify clients about changed exit status */
3162         unit_add_to_dbus_queue(u);
3163 }
3164
3165 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
3166         Service *s = SERVICE(u);
3167
3168         assert(s);
3169         assert(elapsed == 1);
3170
3171         if (w == &s->watchdog_watch) {
3172                 service_handle_watchdog(s);
3173                 return;
3174         }
3175
3176         assert(w == &s->timer_watch);
3177
3178         switch (s->state) {
3179
3180         case SERVICE_START_PRE:
3181         case SERVICE_START:
3182                 log_warning_unit(u->id,
3183                                  "%s operation timed out. Terminating.", u->id);
3184                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3185                 break;
3186
3187         case SERVICE_START_POST:
3188                 log_warning_unit(u->id,
3189                                  "%s operation timed out. Stopping.", u->id);
3190                 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3191                 break;
3192
3193         case SERVICE_RELOAD:
3194                 log_warning_unit(u->id,
3195                                  "%s operation timed out. Stopping.", u->id);
3196                 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3197                 service_enter_running(s, SERVICE_SUCCESS);
3198                 break;
3199
3200         case SERVICE_STOP:
3201                 log_warning_unit(u->id,
3202                                  "%s stopping timed out. Terminating.", u->id);
3203                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3204                 break;
3205
3206         case SERVICE_STOP_SIGTERM:
3207                 if (s->kill_context.send_sigkill) {
3208                         log_warning_unit(u->id,
3209                                          "%s stopping timed out. Killing.", u->id);
3210                         service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3211                 } else {
3212                         log_warning_unit(u->id,
3213                                          "%s stopping timed out. Skipping SIGKILL.", u->id);
3214                         service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3215                 }
3216
3217                 break;
3218
3219         case SERVICE_STOP_SIGKILL:
3220                 /* Uh, we sent a SIGKILL and it is still not gone?
3221                  * Must be something we cannot kill, so let's just be
3222                  * weirded out and continue */
3223
3224                 log_warning_unit(u->id,
3225                                  "%s still around after SIGKILL. Ignoring.", u->id);
3226                 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3227                 break;
3228
3229         case SERVICE_STOP_POST:
3230                 log_warning_unit(u->id,
3231                                  "%s stopping timed out (2). Terminating.", u->id);
3232                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3233                 break;
3234
3235         case SERVICE_FINAL_SIGTERM:
3236                 if (s->kill_context.send_sigkill) {
3237                         log_warning_unit(u->id,
3238                                          "%s stopping timed out (2). Killing.", u->id);
3239                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3240                 } else {
3241                         log_warning_unit(u->id,
3242                                          "%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.",
3243                                          u->id);
3244                         service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3245                 }
3246
3247                 break;
3248
3249         case SERVICE_FINAL_SIGKILL:
3250                 log_warning_unit(u->id,
3251                                  "%s still around after SIGKILL (2). Entering failed mode.", u->id);
3252                 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3253                 break;
3254
3255         case SERVICE_AUTO_RESTART:
3256                 log_info_unit(u->id,
3257                               "%s holdoff time over, scheduling restart.", u->id);
3258                 service_enter_restart(s);
3259                 break;
3260
3261         default:
3262                 assert_not_reached("Timeout at wrong time.");
3263         }
3264 }
3265
3266 static void service_notify_cgroup_empty_event(Unit *u) {
3267         Service *s = SERVICE(u);
3268
3269         assert(u);
3270
3271         log_debug_unit(u->id, "%s: cgroup is empty", u->id);
3272
3273         switch (s->state) {
3274
3275                 /* Waiting for SIGCHLD is usually more interesting,
3276                  * because it includes return codes/signals. Which is
3277                  * why we ignore the cgroup events for most cases,
3278                  * except when we don't know pid which to expect the
3279                  * SIGCHLD for. */
3280
3281         case SERVICE_START:
3282         case SERVICE_START_POST:
3283                 /* If we were hoping for the daemon to write its PID file,
3284                  * we can give up now. */
3285                 if (s->pid_file_pathspec) {
3286                         log_warning_unit(u->id,
3287                                          "%s never wrote its PID file. Failing.", UNIT(s)->id);
3288                         service_unwatch_pid_file(s);
3289                         if (s->state == SERVICE_START)
3290                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3291                         else
3292                                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3293                 }
3294                 break;
3295
3296         case SERVICE_RUNNING:
3297                 /* service_enter_running() will figure out what to do */
3298                 service_enter_running(s, SERVICE_SUCCESS);
3299                 break;
3300
3301         case SERVICE_STOP_SIGTERM:
3302         case SERVICE_STOP_SIGKILL:
3303
3304                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3305                         service_enter_stop_post(s, SERVICE_SUCCESS);
3306
3307                 break;
3308
3309         case SERVICE_FINAL_SIGTERM:
3310         case SERVICE_FINAL_SIGKILL:
3311                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3312                         service_enter_dead(s, SERVICE_SUCCESS, true);
3313
3314                 break;
3315
3316         default:
3317                 ;
3318         }
3319 }
3320
3321 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3322         Service *s = SERVICE(u);
3323         const char *e;
3324
3325         assert(u);
3326
3327         if (s->notify_access == NOTIFY_NONE) {
3328                 log_warning_unit(u->id,
3329                                  "%s: Got notification message from PID %lu, but reception is disabled.",
3330                                  u->id, (unsigned long) pid);
3331                 return;
3332         }
3333
3334         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3335                 log_warning_unit(u->id,
3336                                  "%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3337                                  u->id, (unsigned long) pid, (unsigned long) s->main_pid);
3338                 return;
3339         }
3340
3341         log_debug_unit(u->id,
3342                        "%s: Got message", u->id);
3343
3344         /* Interpret MAINPID= */
3345         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3346             (s->state == SERVICE_START ||
3347              s->state == SERVICE_START_POST ||
3348              s->state == SERVICE_RUNNING ||
3349              s->state == SERVICE_RELOAD)) {
3350
3351                 if (parse_pid(e + 8, &pid) < 0)
3352                         log_warning_unit(u->id,
3353                                          "Failed to parse notification message %s", e);
3354                 else {
3355                         log_debug_unit(u->id,
3356                                        "%s: got %s", u->id, e);
3357                         service_set_main_pid(s, pid);
3358                         unit_watch_pid(UNIT(s), pid);
3359                 }
3360         }
3361
3362         /* Interpret READY= */
3363         if (s->type == SERVICE_NOTIFY &&
3364             s->state == SERVICE_START &&
3365             strv_find(tags, "READY=1")) {
3366                 log_debug_unit(u->id,
3367                                "%s: got READY=1", u->id);
3368
3369                 service_enter_start_post(s);
3370         }
3371
3372         /* Interpret STATUS= */
3373         e = strv_find_prefix(tags, "STATUS=");
3374         if (e) {
3375                 char *t;
3376
3377                 if (e[7]) {
3378
3379                         if (!utf8_is_valid(e+7)) {
3380                                 log_warning_unit(u->id,
3381                                                  "Status message in notification is not UTF-8 clean.");
3382                                 return;
3383                         }
3384
3385                         t = strdup(e+7);
3386                         if (!t) {
3387                                 log_error_unit(u->id,
3388                                                "Failed to allocate string.");
3389                                 return;
3390                         }
3391
3392                         log_debug_unit(u->id,
3393                                        "%s: got %s", u->id, e);
3394
3395                         free(s->status_text);
3396                         s->status_text = t;
3397                 } else {
3398                         free(s->status_text);
3399                         s->status_text = NULL;
3400                 }
3401
3402         }
3403         if (strv_find(tags, "WATCHDOG=1")) {
3404                 log_debug_unit(u->id,
3405                                "%s: got WATCHDOG=1", u->id);
3406                 if (dual_timestamp_is_set(&s->watchdog_timestamp))
3407                         service_reset_watchdog(s);
3408         }
3409
3410         /* Notify clients about changed status or main pid */
3411         unit_add_to_dbus_queue(u);
3412 }
3413
3414 #ifdef HAVE_SYSV_COMPAT
3415
3416 static int service_enumerate(Manager *m) {
3417         char **p;
3418         unsigned i;
3419         _cleanup_closedir_ DIR *d = NULL;
3420         _cleanup_free_ char *path = NULL, *fpath = NULL, *name = NULL;
3421         Set *runlevel_services[ELEMENTSOF(rcnd_table)] = {};
3422         _cleanup_set_free_ Set *shutdown_services = NULL;
3423         Unit *service;
3424         Iterator j;
3425         int r;
3426
3427         assert(m);
3428
3429         if (m->running_as != SYSTEMD_SYSTEM)
3430                 return 0;
3431
3432         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3433                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3434                         struct dirent *de;
3435
3436                         free(path);
3437                         path = strjoin(*p, "/", rcnd_table[i].path, NULL);
3438                         if (!path) {
3439                                 r = -ENOMEM;
3440                                 goto finish;
3441                         }
3442
3443                         if (d)
3444                                 closedir(d);
3445
3446                         d = opendir(path);
3447                         if (!d) {
3448                                 if (errno != ENOENT)
3449                                         log_warning("opendir(%s) failed: %s", path, strerror(errno));
3450
3451                                 continue;
3452                         }
3453
3454                         while ((de = readdir(d))) {
3455                                 int a, b;
3456
3457                                 if (ignore_file(de->d_name))
3458                                         continue;
3459
3460                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3461                                         continue;
3462
3463                                 if (strlen(de->d_name) < 4)
3464                                         continue;
3465
3466                                 a = undecchar(de->d_name[1]);
3467                                 b = undecchar(de->d_name[2]);
3468
3469                                 if (a < 0 || b < 0)
3470                                         continue;
3471
3472                                 free(fpath);
3473                                 fpath = strjoin(path, "/", de->d_name, NULL);
3474                                 if (!fpath) {
3475                                         r = -ENOMEM;
3476                                         goto finish;
3477                                 }
3478
3479                                 if (access(fpath, X_OK) < 0) {
3480
3481                                         if (errno != ENOENT)
3482                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3483
3484                                         continue;
3485                                 }
3486
3487                                 free(name);
3488                                 name = sysv_translate_name(de->d_name + 3);
3489                                 if (!name) {
3490                                         r = log_oom();
3491                                         goto finish;
3492                                 }
3493
3494                                 r = manager_load_unit_prepare(m, name, NULL, NULL, &service);
3495                                 if (r < 0) {
3496                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3497                                         continue;
3498                                 }
3499
3500                                 if (de->d_name[0] == 'S')  {
3501
3502                                         if (rcnd_table[i].type == RUNLEVEL_UP) {
3503                                                 SERVICE(service)->sysv_start_priority_from_rcnd =
3504                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3505
3506                                                 SERVICE(service)->sysv_enabled = true;
3507                                         }
3508
3509                                         r = set_ensure_allocated(&runlevel_services[i],
3510                                                                  trivial_hash_func, trivial_compare_func);
3511                                         if (r < 0)
3512                                                 goto finish;
3513
3514                                         r = set_put(runlevel_services[i], service);
3515                                         if (r < 0)
3516                                                 goto finish;
3517
3518                                 } else if (de->d_name[0] == 'K' &&
3519                                            (rcnd_table[i].type == RUNLEVEL_DOWN)) {
3520
3521                                         r = set_ensure_allocated(&shutdown_services,
3522                                                                  trivial_hash_func, trivial_compare_func);
3523                                         if (r < 0)
3524                                                 goto finish;
3525
3526                                         r = set_put(shutdown_services, service);
3527                                         if (r < 0)
3528                                                 goto finish;
3529                                 }
3530                         }
3531                 }
3532
3533         /* Now we loaded all stubs and are aware of the lowest
3534         start-up priority for all services, not let's actually load
3535         the services, this will also tell us which services are
3536         actually native now */
3537         manager_dispatch_load_queue(m);
3538
3539         /* If this is a native service, rely on native ways to pull in
3540          * a service, don't pull it in via sysv rcN.d links. */
3541         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3542                 SET_FOREACH(service, runlevel_services[i], j) {
3543                         service = unit_follow_merge(service);
3544
3545                         if (service->fragment_path)
3546                                 continue;
3547
3548                         r = unit_add_two_dependencies_by_name_inverse(
3549                                 service, UNIT_AFTER, UNIT_WANTS,
3550                                 rcnd_table[i].target, NULL, true);
3551                         if (r < 0)
3552                                 goto finish;
3553                 }
3554
3555         /* We honour K links only for halt/reboot. For the normal
3556          * runlevels we assume the stop jobs will be implicitly added
3557          * by the core logic. Also, we don't really distinguish here
3558          * between the runlevels 0 and 6 and just add them to the
3559          * special shutdown target. */
3560         SET_FOREACH(service, shutdown_services, j) {
3561                 service = unit_follow_merge(service);
3562
3563                 if (service->fragment_path)
3564                         continue;
3565
3566                 r = unit_add_two_dependencies_by_name(
3567                         service, UNIT_BEFORE, UNIT_CONFLICTS,
3568                         SPECIAL_SHUTDOWN_TARGET, NULL, true);
3569                 if (r < 0)
3570                         goto finish;
3571         }
3572
3573         r = 0;
3574
3575 finish:
3576
3577         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3578                 set_free(runlevel_services[i]);
3579
3580         return r;
3581 }
3582 #endif
3583
3584 static void service_bus_name_owner_change(
3585                 Unit *u,
3586                 const char *name,
3587                 const char *old_owner,
3588                 const char *new_owner) {
3589
3590         Service *s = SERVICE(u);
3591
3592         assert(s);
3593         assert(name);
3594
3595         assert(streq(s->bus_name, name));
3596         assert(old_owner || new_owner);
3597
3598         if (old_owner && new_owner)
3599                 log_debug_unit(u->id,
3600                                "%s's D-Bus name %s changed owner from %s to %s",
3601                                u->id, name, old_owner, new_owner);
3602         else if (old_owner)
3603                 log_debug_unit(u->id,
3604                                "%s's D-Bus name %s no longer registered by %s",
3605                                u->id, name, old_owner);
3606         else
3607                 log_debug_unit(u->id,
3608                                "%s's D-Bus name %s now registered by %s",
3609                                u->id, name, new_owner);
3610
3611         s->bus_name_good = !!new_owner;
3612
3613         if (s->type == SERVICE_DBUS) {
3614
3615                 /* service_enter_running() will figure out what to
3616                  * do */
3617                 if (s->state == SERVICE_RUNNING)
3618                         service_enter_running(s, SERVICE_SUCCESS);
3619                 else if (s->state == SERVICE_START && new_owner)
3620                         service_enter_start_post(s);
3621
3622         } else if (new_owner &&
3623                    s->main_pid <= 0 &&
3624                    (s->state == SERVICE_START ||
3625                     s->state == SERVICE_START_POST ||
3626                     s->state == SERVICE_RUNNING ||
3627                     s->state == SERVICE_RELOAD)) {
3628
3629                 /* Try to acquire PID from bus service */
3630                 log_debug_unit(u->id,
3631                                "Trying to acquire PID from D-Bus name...");
3632
3633                 bus_query_pid(u->manager, name);
3634         }
3635 }
3636
3637 static void service_bus_query_pid_done(
3638                 Unit *u,
3639                 const char *name,
3640                 pid_t pid) {
3641
3642         Service *s = SERVICE(u);
3643
3644         assert(s);
3645         assert(name);
3646
3647         log_debug_unit(u->id,
3648                        "%s's D-Bus name %s is now owned by process %u",
3649                        u->id, name, (unsigned) pid);
3650
3651         if (s->main_pid <= 0 &&
3652             (s->state == SERVICE_START ||
3653              s->state == SERVICE_START_POST ||
3654              s->state == SERVICE_RUNNING ||
3655              s->state == SERVICE_RELOAD)){
3656                 service_set_main_pid(s, pid);
3657                 unit_watch_pid(UNIT(s), pid);
3658         }
3659 }
3660
3661 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3662
3663         assert(s);
3664         assert(fd >= 0);
3665
3666         /* This is called by the socket code when instantiating a new
3667          * service for a stream socket and the socket needs to be
3668          * configured. */
3669
3670         if (UNIT(s)->load_state != UNIT_LOADED)
3671                 return -EINVAL;
3672
3673         if (s->socket_fd >= 0)
3674                 return -EBUSY;
3675
3676         if (s->state != SERVICE_DEAD)
3677                 return -EAGAIN;
3678
3679         s->socket_fd = fd;
3680         s->got_socket_fd = true;
3681
3682         unit_ref_set(&s->accept_socket, UNIT(sock));
3683
3684         return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3685 }
3686
3687 static void service_reset_failed(Unit *u) {
3688         Service *s = SERVICE(u);
3689
3690         assert(s);
3691
3692         if (s->state == SERVICE_FAILED)
3693                 service_set_state(s, SERVICE_DEAD);
3694
3695         s->result = SERVICE_SUCCESS;
3696         s->reload_result = SERVICE_SUCCESS;
3697
3698         RATELIMIT_RESET(s->start_limit);
3699 }
3700
3701 static int service_kill(Unit *u, KillWho who, int signo, DBusError *error) {
3702         Service *s = SERVICE(u);
3703
3704         return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3705 }
3706
3707 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3708         [SERVICE_DEAD] = "dead",
3709         [SERVICE_START_PRE] = "start-pre",
3710         [SERVICE_START] = "start",
3711         [SERVICE_START_POST] = "start-post",
3712         [SERVICE_RUNNING] = "running",
3713         [SERVICE_EXITED] = "exited",
3714         [SERVICE_RELOAD] = "reload",
3715         [SERVICE_STOP] = "stop",
3716         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3717         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3718         [SERVICE_STOP_POST] = "stop-post",
3719         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3720         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3721         [SERVICE_FAILED] = "failed",
3722         [SERVICE_AUTO_RESTART] = "auto-restart",
3723 };
3724
3725 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3726
3727 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3728         [SERVICE_RESTART_NO] = "no",
3729         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3730         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3731         [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3732         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3733         [SERVICE_RESTART_ALWAYS] = "always"
3734 };
3735
3736 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3737
3738 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3739         [SERVICE_SIMPLE] = "simple",
3740         [SERVICE_FORKING] = "forking",
3741         [SERVICE_ONESHOT] = "oneshot",
3742         [SERVICE_DBUS] = "dbus",
3743         [SERVICE_NOTIFY] = "notify",
3744         [SERVICE_IDLE] = "idle"
3745 };
3746
3747 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3748
3749 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3750         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3751         [SERVICE_EXEC_START] = "ExecStart",
3752         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3753         [SERVICE_EXEC_RELOAD] = "ExecReload",
3754         [SERVICE_EXEC_STOP] = "ExecStop",
3755         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3756 };
3757
3758 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3759
3760 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3761         [NOTIFY_NONE] = "none",
3762         [NOTIFY_MAIN] = "main",
3763         [NOTIFY_ALL] = "all"
3764 };
3765
3766 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3767
3768 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3769         [SERVICE_SUCCESS] = "success",
3770         [SERVICE_FAILURE_RESOURCES] = "resources",
3771         [SERVICE_FAILURE_TIMEOUT] = "timeout",
3772         [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3773         [SERVICE_FAILURE_SIGNAL] = "signal",
3774         [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3775         [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3776         [SERVICE_FAILURE_START_LIMIT] = "start-limit"
3777 };
3778
3779 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3780
3781 static const char* const start_limit_action_table[_SERVICE_START_LIMIT_MAX] = {
3782         [SERVICE_START_LIMIT_NONE] = "none",
3783         [SERVICE_START_LIMIT_REBOOT] = "reboot",
3784         [SERVICE_START_LIMIT_REBOOT_FORCE] = "reboot-force",
3785         [SERVICE_START_LIMIT_REBOOT_IMMEDIATE] = "reboot-immediate"
3786 };
3787 DEFINE_STRING_TABLE_LOOKUP(start_limit_action, StartLimitAction);
3788
3789 const UnitVTable service_vtable = {
3790         .object_size = sizeof(Service),
3791
3792         .sections =
3793                 "Unit\0"
3794                 "Service\0"
3795                 "Install\0",
3796
3797         .private_section = "Service",
3798         .exec_context_offset = offsetof(Service, exec_context),
3799         .cgroup_context_offset = offsetof(Service, cgroup_context),
3800
3801         .init = service_init,
3802         .done = service_done,
3803         .load = service_load,
3804
3805         .coldplug = service_coldplug,
3806
3807         .dump = service_dump,
3808
3809         .start = service_start,
3810         .stop = service_stop,
3811         .reload = service_reload,
3812
3813         .can_reload = service_can_reload,
3814
3815         .kill = service_kill,
3816
3817         .serialize = service_serialize,
3818         .deserialize_item = service_deserialize_item,
3819
3820         .active_state = service_active_state,
3821         .sub_state_to_string = service_sub_state_to_string,
3822
3823         .check_gc = service_check_gc,
3824         .check_snapshot = service_check_snapshot,
3825
3826         .sigchld_event = service_sigchld_event,
3827         .timer_event = service_timer_event,
3828         .fd_event = service_fd_event,
3829
3830         .reset_failed = service_reset_failed,
3831
3832         .notify_cgroup_empty = service_notify_cgroup_empty_event,
3833         .notify_message = service_notify_message,
3834
3835         .bus_name_owner_change = service_bus_name_owner_change,
3836         .bus_query_pid_done = service_bus_query_pid_done,
3837
3838         .bus_interface = "org.freedesktop.systemd1.Service",
3839         .bus_message_handler = bus_service_message_handler,
3840         .bus_invalidating_properties =  bus_service_invalidating_properties,
3841         .bus_set_property = bus_service_set_property,
3842         .bus_commit_properties = bus_service_commit_properties,
3843
3844         .can_transient = true,
3845
3846 #ifdef HAVE_SYSV_COMPAT
3847         .enumerate = service_enumerate,
3848 #endif
3849         .status_message_formats = {
3850                 .starting_stopping = {
3851                         [0] = "Starting %s...",
3852                         [1] = "Stopping %s...",
3853                 },
3854                 .finished_start_job = {
3855                         [JOB_DONE]       = "Started %s.",
3856                         [JOB_FAILED]     = "Failed to start %s.",
3857                         [JOB_DEPENDENCY] = "Dependency failed for %s.",
3858                         [JOB_TIMEOUT]    = "Timed out starting %s.",
3859                 },
3860                 .finished_stop_job = {
3861                         [JOB_DONE]       = "Stopped %s.",
3862                         [JOB_FAILED]     = "Stopped (with error) %s.",
3863                         [JOB_TIMEOUT]    = "Timed out stopping %s.",
3864                 },
3865         },
3866 };