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 = DEFAULT_TIMEOUT_USEC;
 128         s->timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
 129         s->restart_usec = 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         service_unwatch_main_pid(s);
 195
 196         s->main_pid = pid;
 197         s->main_pid_known = true;
 198
 199         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
 200                 log_warning_unit(UNIT(s)->id,
 201                                  "%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 202                                  UNIT(s)->id, (unsigned long) pid);
 203
 204                 s->main_pid_alien = true;
 205         } else
 206                 s->main_pid_alien = false;
 207
 208         exec_status_start(&s->main_exec_status, pid);
 209
 210         return 0;
 211 }
 212
 213 static void service_close_socket_fd(Service *s) {
 214         assert(s);
 215
 216         if (s->socket_fd < 0)
 217                 return;
 218
 219         close_nointr_nofail(s->socket_fd);
 220         s->socket_fd = -1;
 221 }
 222
 223 static void service_connection_unref(Service *s) {
 224         assert(s);
 225
 226         if (!UNIT_ISSET(s->accept_socket))
 227                 return;
 228
 229         socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
 230         unit_ref_unset(&s->accept_socket);
 231 }
 232
 233 static void service_stop_watchdog(Service *s) {
 234         assert(s);
 235
 236         unit_unwatch_timer(UNIT(s), &s->watchdog_watch);
 237         s->watchdog_timestamp.realtime = 0;
 238         s->watchdog_timestamp.monotonic = 0;
 239 }
 240
 241 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
 242
 243 static void service_handle_watchdog(Service *s) {
 244         usec_t offset;
 245         int r;
 246
 247         assert(s);
 248
 249         if (s->watchdog_usec == 0)
 250                 return;
 251
 252         offset = now(CLOCK_MONOTONIC) - s->watchdog_timestamp.monotonic;
 253         if (offset >= s->watchdog_usec) {
 254                 log_error_unit(UNIT(s)->id, "%s watchdog timeout!", UNIT(s)->id);
 255                 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_WATCHDOG);
 256                 return;
 257         }
 258
 259         r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->watchdog_usec - offset, &s->watchdog_watch);
 260         if (r < 0)
 261                 log_warning_unit(UNIT(s)->id,
 262                                  "%s failed to install watchdog timer: %s",
 263                                  UNIT(s)->id, strerror(-r));
 264 }
 265
 266 static void service_reset_watchdog(Service *s) {
 267         assert(s);
 268
 269         dual_timestamp_get(&s->watchdog_timestamp);
 270         service_handle_watchdog(s);
 271 }
 272
 273 static void service_done(Unit *u) {
 274         Service *s = SERVICE(u);
 275
 276         assert(s);
 277
 278         free(s->pid_file);
 279         s->pid_file = NULL;
 280
 281 #ifdef HAVE_SYSV_COMPAT
 282         free(s->sysv_runlevels);
 283         s->sysv_runlevels = NULL;
 284 #endif
 285
 286         free(s->status_text);
 287         s->status_text = NULL;
 288
 289         cgroup_context_done(&s->cgroup_context);
 290         exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager));
 291         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 292         s->control_command = NULL;
 293         s->main_command = NULL;
 294
 295         set_free(s->restart_ignore_status.code);
 296         s->restart_ignore_status.code = NULL;
 297         set_free(s->restart_ignore_status.signal);
 298         s->restart_ignore_status.signal = NULL;
 299
 300         set_free(s->success_status.code);
 301         s->success_status.code = NULL;
 302         set_free(s->success_status.signal);
 303         s->success_status.signal = NULL;
 304
 305         /* This will leak a process, but at least no memory or any of
 306          * our resources */
 307         service_unwatch_main_pid(s);
 308         service_unwatch_control_pid(s);
 309         service_unwatch_pid_file(s);
 310
 311         if (s->bus_name)  {
 312                 unit_unwatch_bus_name(u, s->bus_name);
 313                 free(s->bus_name);
 314                 s->bus_name = NULL;
 315         }
 316
 317         service_close_socket_fd(s);
 318         service_connection_unref(s);
 319
 320         unit_ref_unset(&s->accept_socket);
 321
 322         service_stop_watchdog(s);
 323
 324         unit_unwatch_timer(u, &s->timer_watch);
 325 }
 326
 327 #ifdef HAVE_SYSV_COMPAT
 328 static char *sysv_translate_name(const char *name) {
 329         char *r;
 330
 331         r = new(char, strlen(name) + sizeof(".service"));
 332         if (!r)
 333                 return NULL;
 334
 335         if (endswith(name, ".sh"))
 336                 /* Drop .sh suffix */
 337                 strcpy(stpcpy(r, name) - 3, ".service");
 338         else
 339                 /* Normal init script name */
 340                 strcpy(stpcpy(r, name), ".service");
 341
 342         return r;
 343 }
 344
 345 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 346
 347         /* We silently ignore the $ prefix here. According to the LSB
 348          * spec it simply indicates whether something is a
 349          * standardized name or a distribution-specific one. Since we
 350          * just follow what already exists and do not introduce new
 351          * uses or names we don't care who introduced a new name. */
 352
 353         static const char * const table[] = {
 354                 /* LSB defined facilities */
 355                 "local_fs",             NULL,
 356                 "network",              SPECIAL_NETWORK_TARGET,
 357                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 358                 "portmap",              SPECIAL_RPCBIND_TARGET,
 359                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 360                 "syslog",               NULL,
 361                 "time",                 SPECIAL_TIME_SYNC_TARGET,
 362         };
 363
 364         unsigned i;
 365         char *r;
 366         const char *n;
 367
 368         assert(name);
 369         assert(_r);
 370
 371         n = *name == '$' ? name + 1 : name;
 372
 373         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 374
 375                 if (!streq(table[i], n))
 376                         continue;
 377
 378                 if (!table[i+1])
 379                         return 0;
 380
 381                 r = strdup(table[i+1]);
 382                 if (!r)
 383                         return log_oom();
 384
 385                 goto finish;
 386         }
 387
 388         /* If we don't know this name, fallback heuristics to figure
 389          * out whether something is a target or a service alias. */
 390
 391         if (*name == '$') {
 392                 if (!unit_prefix_is_valid(n))
 393                         return -EINVAL;
 394
 395                 /* Facilities starting with $ are most likely targets */
 396                 r = unit_name_build(n, NULL, ".target");
 397         } else if (filename && streq(name, filename))
 398                 /* Names equaling the file name of the services are redundant */
 399                 return 0;
 400         else
 401                 /* Everything else we assume to be normal service names */
 402                 r = sysv_translate_name(n);
 403
 404         if (!r)
 405                 return -ENOMEM;
 406
 407 finish:
 408         *_r = r;
 409
 410         return 1;
 411 }
 412
 413 static int sysv_fix_order(Service *s) {
 414         Unit *other;
 415         int r;
 416
 417         assert(s);
 418
 419         if (s->sysv_start_priority < 0)
 420                 return 0;
 421
 422         /* For each pair of services where at least one lacks a LSB
 423          * header, we use the start priority value to order things. */
 424
 425         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
 426                 Service *t;
 427                 UnitDependency d;
 428                 bool special_s, special_t;
 429
 430                 t = SERVICE(other);
 431
 432                 if (s == t)
 433                         continue;
 434
 435                 if (UNIT(t)->load_state != UNIT_LOADED)
 436                         continue;
 437
 438                 if (t->sysv_start_priority < 0)
 439                         continue;
 440
 441                 /* If both units have modern headers we don't care
 442                  * about the priorities */
 443                 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
 444                     (UNIT(t)->fragment_path || t->sysv_has_lsb))
 445                         continue;
 446
 447                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 448                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 449
 450                 if (special_t && !special_s)
 451                         d = UNIT_AFTER;
 452                 else if (special_s && !special_t)
 453                         d = UNIT_BEFORE;
 454                 else if (t->sysv_start_priority < s->sysv_start_priority)
 455                         d = UNIT_AFTER;
 456                 else if (t->sysv_start_priority > s->sysv_start_priority)
 457                         d = UNIT_BEFORE;
 458                 else
 459                         continue;
 460
 461                 /* FIXME: Maybe we should compare the name here lexicographically? */
 462
 463                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 464                         return r;
 465         }
 466
 467         return 0;
 468 }
 469
 470 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 471         ExecCommand *c;
 472
 473         if (!(c = new0(ExecCommand, 1)))
 474                 return NULL;
 475
 476         if (!(c->path = strdup(path))) {
 477                 free(c);
 478                 return NULL;
 479         }
 480
 481         if (!(c->argv = strv_new(path, arg1, NULL))) {
 482                 free(c->path);
 483                 free(c);
 484                 return NULL;
 485         }
 486
 487         return c;
 488 }
 489
 490 static int sysv_exec_commands(Service *s, const bool supports_reload) {
 491         ExecCommand *c;
 492
 493         assert(s);
 494         assert(s->is_sysv);
 495         assert(UNIT(s)->source_path);
 496
 497         c = exec_command_new(UNIT(s)->source_path, "start");
 498         if (!c)
 499                 return -ENOMEM;
 500         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 501
 502         c = exec_command_new(UNIT(s)->source_path, "stop");
 503         if (!c)
 504                 return -ENOMEM;
 505         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 506
 507         if (supports_reload) {
 508                 c = exec_command_new(UNIT(s)->source_path, "reload");
 509                 if (!c)
 510                         return -ENOMEM;
 511                 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 512         }
 513
 514         return 0;
 515 }
 516
 517 static bool usage_contains_reload(const char *line) {
 518         return (strcasestr(line, "{reload|") ||
 519                 strcasestr(line, "{reload}") ||
 520                 strcasestr(line, "{reload\"") ||
 521                 strcasestr(line, "|reload|") ||
 522                 strcasestr(line, "|reload}") ||
 523                 strcasestr(line, "|reload\""));
 524 }
 525
 526 static int service_load_sysv_path(Service *s, const char *path) {
 527         FILE *f;
 528         Unit *u;
 529         unsigned line = 0;
 530         int r;
 531         enum {
 532                 NORMAL,
 533                 DESCRIPTION,
 534                 LSB,
 535                 LSB_DESCRIPTION,
 536                 USAGE_CONTINUATION
 537         } state = NORMAL;
 538         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 539         struct stat st;
 540         bool supports_reload = false;
 541
 542         assert(s);
 543         assert(path);
 544
 545         u = UNIT(s);
 546
 547         f = fopen(path, "re");
 548         if (!f) {
 549                 r = errno == ENOENT ? 0 : -errno;
 550                 goto finish;
 551         }
 552
 553         if (fstat(fileno(f), &st) < 0) {
 554                 r = -errno;
 555                 goto finish;
 556         }
 557
 558         free(u->source_path);
 559         u->source_path = strdup(path);
 560         if (!u->source_path) {
 561                 r = -ENOMEM;
 562                 goto finish;
 563         }
 564         u->source_mtime = timespec_load(&st.st_mtim);
 565
 566         if (null_or_empty(&st)) {
 567                 u->load_state = UNIT_MASKED;
 568                 r = 0;
 569                 goto finish;
 570         }
 571
 572         s->is_sysv = true;
 573
 574         while (!feof(f)) {
 575                 char l[LINE_MAX], *t;
 576
 577                 if (!fgets(l, sizeof(l), f)) {
 578                         if (feof(f))
 579                                 break;
 580
 581                         r = -errno;
 582                         log_error_unit(u->id,
 583                                        "Failed to read configuration file '%s': %s",
 584                                        path, strerror(-r));
 585                         goto finish;
 586                 }
 587
 588                 line++;
 589
 590                 t = strstrip(l);
 591                 if (*t != '#') {
 592                         /* Try to figure out whether this init script supports
 593                          * the reload operation. This heuristic looks for
 594                          * "Usage" lines which include the reload option. */
 595                         if ( state == USAGE_CONTINUATION ||
 596                             (state == NORMAL && strcasestr(t, "usage"))) {
 597                                 if (usage_contains_reload(t)) {
 598                                         supports_reload = true;
 599                                         state = NORMAL;
 600                                 } else if (t[strlen(t)-1] == '\\')
 601                                         state = USAGE_CONTINUATION;
 602                                 else
 603                                         state = NORMAL;
 604                         }
 605
 606                         continue;
 607                 }
 608
 609                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 610                         state = LSB;
 611                         s->sysv_has_lsb = true;
 612                         continue;
 613                 }
 614
 615                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 616                         state = NORMAL;
 617                         continue;
 618                 }
 619
 620                 t++;
 621                 t += strspn(t, WHITESPACE);
 622
 623                 if (state == NORMAL) {
 624
 625                         /* Try to parse Red Hat style chkconfig headers */
 626
 627                         if (startswith_no_case(t, "chkconfig:")) {
 628                                 int start_priority;
 629                                 char runlevels[16], *k;
 630
 631                                 state = NORMAL;
 632
 633                                 if (sscanf(t+10, "%15s %i %*i",
 634                                            runlevels,
 635                                            &start_priority) != 2) {
 636
 637                                         log_warning_unit(u->id,
 638                                                          "[%s:%u] Failed to parse chkconfig line. Ignoring.",
 639                                                          path, line);
 640                                         continue;
 641                                 }
 642
 643                                 /* A start priority gathered from the
 644                                  * symlink farms is preferred over the
 645                                  * data from the LSB header. */
 646                                 if (start_priority < 0 || start_priority > 99)
 647                                         log_warning_unit(u->id,
 648                                                          "[%s:%u] Start priority out of range. Ignoring.",
 649                                                          path, line);
 650                                 else
 651                                         s->sysv_start_priority = start_priority;
 652
 653                                 char_array_0(runlevels);
 654                                 k = delete_chars(runlevels, WHITESPACE "-");
 655
 656                                 if (k[0]) {
 657                                         char *d;
 658
 659                                         if (!(d = strdup(k))) {
 660                                                 r = -ENOMEM;
 661                                                 goto finish;
 662                                         }
 663
 664                                         free(s->sysv_runlevels);
 665                                         s->sysv_runlevels = d;
 666                                 }
 667
 668                         } else if (startswith_no_case(t, "description:")) {
 669
 670                                 size_t k = strlen(t);
 671                                 char *d;
 672                                 const char *j;
 673
 674                                 if (t[k-1] == '\\') {
 675                                         state = DESCRIPTION;
 676                                         t[k-1] = 0;
 677                                 }
 678
 679                                 if ((j = strstrip(t+12)) && *j) {
 680                                         if (!(d = strdup(j))) {
 681                                                 r = -ENOMEM;
 682                                                 goto finish;
 683                                         }
 684                                 } else
 685                                         d = NULL;
 686
 687                                 free(chkconfig_description);
 688                                 chkconfig_description = d;
 689
 690                         } else if (startswith_no_case(t, "pidfile:")) {
 691
 692                                 char *fn;
 693
 694                                 state = NORMAL;
 695
 696                                 fn = strstrip(t+8);
 697                                 if (!path_is_absolute(fn)) {
 698                                         log_warning_unit(u->id,
 699                                                          "[%s:%u] PID file not absolute. Ignoring.",
 700                                                          path, line);
 701                                         continue;
 702                                 }
 703
 704                                 if (!(fn = strdup(fn))) {
 705                                         r = -ENOMEM;
 706                                         goto finish;
 707                                 }
 708
 709                                 free(s->pid_file);
 710                                 s->pid_file = fn;
 711                         }
 712
 713                 } else if (state == DESCRIPTION) {
 714
 715                         /* Try to parse Red Hat style description
 716                          * continuation */
 717
 718                         size_t k = strlen(t);
 719                         char *j;
 720
 721                         if (t[k-1] == '\\')
 722                                 t[k-1] = 0;
 723                         else
 724                                 state = NORMAL;
 725
 726                         if ((j = strstrip(t)) && *j) {
 727                                 char *d = NULL;
 728
 729                                 if (chkconfig_description)
 730                                         d = strjoin(chkconfig_description, " ", j, NULL);
 731                                 else
 732                                         d = strdup(j);
 733
 734                                 if (!d) {
 735                                         r = -ENOMEM;
 736                                         goto finish;
 737                                 }
 738
 739                                 free(chkconfig_description);
 740                                 chkconfig_description = d;
 741                         }
 742
 743                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 744
 745                         if (startswith_no_case(t, "Provides:")) {
 746                                 char *i, *w;
 747                                 size_t z;
 748
 749                                 state = LSB;
 750
 751                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 752                                         char *n, *m;
 753
 754                                         if (!(n = strndup(w, z))) {
 755                                                 r = -ENOMEM;
 756                                                 goto finish;
 757                                         }
 758
 759                                         r = sysv_translate_facility(n, path_get_file_name(path), &m);
 760                                         free(n);
 761
 762                                         if (r < 0)
 763                                                 goto finish;
 764
 765                                         if (r == 0)
 766                                                 continue;
 767
 768                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 769                                                 r = unit_merge_by_name(u, m);
 770                                         else
 771                                                 /* NB: SysV targets
 772                                                  * which are provided
 773                                                  * by a service are
 774                                                  * pulled in by the
 775                                                  * services, as an
 776                                                  * indication that the
 777                                                  * generic service is
 778                                                  * now available. This
 779                                                  * is strictly
 780                                                  * one-way. The
 781                                                  * targets do NOT pull
 782                                                  * in the SysV
 783                                                  * services! */
 784                                                 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
 785
 786                                         if (r < 0)
 787                                                 log_error_unit(u->id,
 788                                                                "[%s:%u] Failed to add LSB Provides name %s, ignoring: %s",
 789                                                                path, line, m, strerror(-r));
 790
 791                                         free(m);
 792                                 }
 793
 794                         } else if (startswith_no_case(t, "Required-Start:") ||
 795                                    startswith_no_case(t, "Should-Start:") ||
 796                                    startswith_no_case(t, "X-Start-Before:") ||
 797                                    startswith_no_case(t, "X-Start-After:")) {
 798                                 char *i, *w;
 799                                 size_t z;
 800
 801                                 state = LSB;
 802
 803                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 804                                         char *n, *m;
 805
 806                                         if (!(n = strndup(w, z))) {
 807                                                 r = -ENOMEM;
 808                                                 goto finish;
 809                                         }
 810
 811                                         r = sysv_translate_facility(n, path_get_file_name(path), &m);
 812                                         if (r < 0) {
 813                                                 log_error_unit(u->id,
 814                                                                "[%s:%u] Failed to translate LSB dependency %s, ignoring: %s",
 815                                                                path, line, n, strerror(-r));
 816                                                 free(n);
 817                                                 continue;
 818                                         }
 819
 820                                         free(n);
 821
 822                                         if (r == 0)
 823                                                 continue;
 824
 825                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 826
 827                                         if (r < 0)
 828                                                 log_error_unit(u->id, "[%s:%u] Failed to add dependency on %s, ignoring: %s",
 829                                                                path, line, m, strerror(-r));
 830
 831                                         free(m);
 832                                 }
 833                         } else if (startswith_no_case(t, "Default-Start:")) {
 834                                 char *k, *d;
 835
 836                                 state = LSB;
 837
 838                                 k = delete_chars(t+14, WHITESPACE "-");
 839
 840                                 if (k[0] != 0) {
 841                                         if (!(d = strdup(k))) {
 842                                                 r = -ENOMEM;
 843                                                 goto finish;
 844                                         }
 845
 846                                         free(s->sysv_runlevels);
 847                                         s->sysv_runlevels = d;
 848                                 }
 849
 850                         } else if (startswith_no_case(t, "Description:")) {
 851                                 char *d, *j;
 852
 853                                 state = LSB_DESCRIPTION;
 854
 855                                 if ((j = strstrip(t+12)) && *j) {
 856                                         if (!(d = strdup(j))) {
 857                                                 r = -ENOMEM;
 858                                                 goto finish;
 859                                         }
 860                                 } else
 861                                         d = NULL;
 862
 863                                 free(long_description);
 864                                 long_description = d;
 865
 866                         } else if (startswith_no_case(t, "Short-Description:")) {
 867                                 char *d, *j;
 868
 869                                 state = LSB;
 870
 871                                 if ((j = strstrip(t+18)) && *j) {
 872                                         if (!(d = strdup(j))) {
 873                                                 r = -ENOMEM;
 874                                                 goto finish;
 875                                         }
 876                                 } else
 877                                         d = NULL;
 878
 879                                 free(short_description);
 880                                 short_description = d;
 881
 882                         } else if (state == LSB_DESCRIPTION) {
 883
 884                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 885                                         char *j;
 886
 887                                         if ((j = strstrip(t)) && *j) {
 888                                                 char *d = NULL;
 889
 890                                                 if (long_description)
 891                                                         d = strjoin(long_description, " ", t, NULL);
 892                                                 else
 893                                                         d = strdup(j);
 894
 895                                                 if (!d) {
 896                                                         r = -ENOMEM;
 897                                                         goto finish;
 898                                                 }
 899
 900                                                 free(long_description);
 901                                                 long_description = d;
 902                                         }
 903
 904                                 } else
 905                                         state = LSB;
 906                         }
 907                 }
 908         }
 909
 910         if ((r = sysv_exec_commands(s, supports_reload)) < 0)
 911                 goto finish;
 912
 913         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 914                 /* If there a runlevels configured for this service
 915                  * but none of the standard ones, then we assume this
 916                  * is some special kind of service (which might be
 917                  * needed for early boot) and don't create any links
 918                  * to it. */
 919
 920                 UNIT(s)->default_dependencies = false;
 921
 922                 /* Don't timeout special services during boot (like fsck) */
 923                 s->timeout_start_usec = 0;
 924                 s->timeout_stop_usec = 0;
 925         } else {
 926                 s->timeout_start_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 927                 s->timeout_stop_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 928         }
 929
 930         /* Special setting for all SysV services */
 931         s->type = SERVICE_FORKING;
 932         s->remain_after_exit = !s->pid_file;
 933         s->guess_main_pid = false;
 934         s->restart = SERVICE_RESTART_NO;
 935         s->exec_context.ignore_sigpipe = false;
 936         s->kill_context.kill_mode = KILL_PROCESS;
 937
 938         /* We use the long description only if
 939          * no short description is set. */
 940
 941         if (short_description)
 942                 description = short_description;
 943         else if (chkconfig_description)
 944                 description = chkconfig_description;
 945         else if (long_description)
 946                 description = long_description;
 947         else
 948                 description = NULL;
 949
 950         if (description) {
 951                 char *d;
 952
 953                 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
 954                         r = -ENOMEM;
 955                         goto finish;
 956                 }
 957
 958                 u->description = d;
 959         }
 960
 961         /* The priority that has been set in /etc/rcN.d/ hierarchies
 962          * takes precedence over what is stored as default in the LSB
 963          * header */
 964         if (s->sysv_start_priority_from_rcnd >= 0)
 965                 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
 966
 967         u->load_state = UNIT_LOADED;
 968         r = 0;
 969
 970 finish:
 971
 972         if (f)
 973                 fclose(f);
 974
 975         free(short_description);
 976         free(long_description);
 977         free(chkconfig_description);
 978
 979         return r;
 980 }
 981
 982 static int service_load_sysv_name(Service *s, const char *name) {
 983         char **p;
 984
 985         assert(s);
 986         assert(name);
 987
 988         /* For SysV services we strip the *.sh suffixes. */
 989         if (endswith(name, ".sh.service"))
 990                 return -ENOENT;
 991
 992         STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
 993                 char *path;
 994                 int r;
 995
 996                 path = strjoin(*p, "/", name, NULL);
 997                 if (!path)
 998                         return -ENOMEM;
 999
1000                 assert(endswith(path, ".service"));
1001                 path[strlen(path)-8] = 0;
1002
1003                 r = service_load_sysv_path(s, path);
1004
1005                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1006                         /* Try *.sh source'able init scripts */
1007                         strcat(path, ".sh");
1008                         r = service_load_sysv_path(s, path);
1009                 }
1010                 free(path);
1011
1012                 if (r < 0)
1013                         return r;
1014
1015                 if (UNIT(s)->load_state != UNIT_STUB)
1016                         break;
1017         }
1018
1019         return 0;
1020 }
1021
1022 static int service_load_sysv(Service *s) {
1023         const char *t;
1024         Iterator i;
1025         int r;
1026
1027         assert(s);
1028
1029         /* Load service data from SysV init scripts, preferably with
1030          * LSB headers ... */
1031
1032         if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1033                 return 0;
1034
1035         if ((t = UNIT(s)->id))
1036                 if ((r = service_load_sysv_name(s, t)) < 0)
1037                         return r;
1038
1039         if (UNIT(s)->load_state == UNIT_STUB)
1040                 SET_FOREACH(t, UNIT(s)->names, i) {
1041                         if (t == UNIT(s)->id)
1042                                 continue;
1043
1044                         if ((r = service_load_sysv_name(s, t)) < 0)
1045                                 return r;
1046
1047                         if (UNIT(s)->load_state != UNIT_STUB)
1048                                 break;
1049                 }
1050
1051         return 0;
1052 }
1053 #endif
1054
1055 static int fsck_fix_order(Service *s) {
1056         Unit *other;
1057         int r;
1058
1059         assert(s);
1060
1061         if (s->fsck_passno <= 0)
1062                 return 0;
1063
1064         /* For each pair of services where both have an fsck priority
1065          * we order things based on it. */
1066
1067         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
1068                 Service *t;
1069                 UnitDependency d;
1070
1071                 t = SERVICE(other);
1072
1073                 if (s == t)
1074                         continue;
1075
1076                 if (UNIT(t)->load_state != UNIT_LOADED)
1077                         continue;
1078
1079                 if (t->fsck_passno <= 0)
1080                         continue;
1081
1082                 if (t->fsck_passno < s->fsck_passno)
1083                         d = UNIT_AFTER;
1084                 else if (t->fsck_passno > s->fsck_passno)
1085                         d = UNIT_BEFORE;
1086                 else
1087                         continue;
1088
1089                 r = unit_add_dependency(UNIT(s), d, UNIT(t), true);
1090                 if (r < 0)
1091                         return r;
1092         }
1093
1094         return 0;
1095 }
1096
1097 static int service_verify(Service *s) {
1098         assert(s);
1099
1100         if (UNIT(s)->load_state != UNIT_LOADED)
1101                 return 0;
1102
1103         if (!s->exec_command[SERVICE_EXEC_START]) {
1104                 log_error_unit(UNIT(s)->id,
1105                                "%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1106                 return -EINVAL;
1107         }
1108
1109         if (s->type != SERVICE_ONESHOT &&
1110             s->exec_command[SERVICE_EXEC_START]->command_next) {
1111                 log_error_unit(UNIT(s)->id,
1112                                "%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1113                 return -EINVAL;
1114         }
1115
1116         if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
1117                 log_error_unit(UNIT(s)->id,
1118                                 "%s has Restart setting other than no, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1119                 return -EINVAL;
1120         }
1121
1122         if (s->type == SERVICE_DBUS && !s->bus_name) {
1123                 log_error_unit(UNIT(s)->id,
1124                                "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1125                 return -EINVAL;
1126         }
1127
1128         if (s->bus_name && s->type != SERVICE_DBUS)
1129                 log_warning_unit(UNIT(s)->id,
1130                                  "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
1131
1132         if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) {
1133                 log_error_unit(UNIT(s)->id,
1134                                "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
1135                 return -EINVAL;
1136         }
1137
1138         return 0;
1139 }
1140
1141 static int service_add_default_dependencies(Service *s) {
1142         int r;
1143
1144         assert(s);
1145
1146         /* Add a number of automatic dependencies useful for the
1147          * majority of services. */
1148
1149         /* First, pull in base system */
1150         if (UNIT(s)->manager->running_as == SYSTEMD_SYSTEM) {
1151                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1152                                                       SPECIAL_BASIC_TARGET, NULL, true);
1153                 if (r < 0)
1154                         return r;
1155
1156         } else if (UNIT(s)->manager->running_as == SYSTEMD_USER) {
1157                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1158                                                       SPECIAL_SOCKETS_TARGET, NULL, true);
1159                 if (r < 0)
1160                         return r;
1161
1162                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1163                                                       SPECIAL_TIMERS_TARGET, NULL, true);
1164                 if (r < 0)
1165                         return r;
1166
1167                 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1168                                                       SPECIAL_PATHS_TARGET, NULL, true);
1169                 if (r < 0)
1170                         return r;
1171         }
1172
1173         /* Second, activate normal shutdown */
1174         r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS,
1175                                               SPECIAL_SHUTDOWN_TARGET, NULL, true);
1176         return r;
1177 }
1178
1179 static void service_fix_output(Service *s) {
1180         assert(s);
1181
1182         /* If nothing has been explicitly configured, patch default
1183          * output in. If input is socket/tty we avoid this however,
1184          * since in that case we want output to default to the same
1185          * place as we read input from. */
1186
1187         if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1188             s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1189             s->exec_context.std_input == EXEC_INPUT_NULL)
1190                 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1191
1192         if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1193             s->exec_context.std_input == EXEC_INPUT_NULL)
1194                 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1195 }
1196
1197 static int service_load(Unit *u) {
1198         int r;
1199         Service *s = SERVICE(u);
1200
1201         assert(s);
1202
1203         /* Load a .service file */
1204         r = unit_load_fragment(u);
1205         if (r < 0)
1206                 return r;
1207
1208 #ifdef HAVE_SYSV_COMPAT
1209         /* Load a classic init script as a fallback, if we couldn't find anything */
1210         if (u->load_state == UNIT_STUB) {
1211                 r = service_load_sysv(s);
1212                 if (r < 0)
1213                         return r;
1214         }
1215 #endif
1216
1217         /* Still nothing found? Then let's give up */
1218         if (u->load_state == UNIT_STUB)
1219                 return -ENOENT;
1220
1221         /* This is a new unit? Then let's add in some extras */
1222         if (u->load_state == UNIT_LOADED) {
1223
1224                 /* We were able to load something, then let's add in
1225                  * the dropin directories. */
1226                 r = unit_load_dropin(u);
1227                 if (r < 0)
1228                         return r;
1229
1230                 if (s->type == _SERVICE_TYPE_INVALID)
1231                         s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
1232
1233                 /* Oneshot services have disabled start timeout by default */
1234                 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
1235                         s->timeout_start_usec = 0;
1236
1237                 service_fix_output(s);
1238
1239                 r = unit_add_exec_dependencies(u, &s->exec_context);
1240                 if (r < 0)
1241                         return r;
1242
1243                 r = unit_add_default_slice(u);
1244                 if (r < 0)
1245                         return r;
1246
1247 #ifdef HAVE_SYSV_COMPAT
1248                 r = sysv_fix_order(s);
1249                 if (r < 0)
1250                         return r;
1251 #endif
1252
1253                 r = fsck_fix_order(s);
1254                 if (r < 0)
1255                         return r;
1256
1257                 if (s->bus_name)
1258                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1259                                 return r;
1260
1261                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1262                         s->notify_access = NOTIFY_MAIN;
1263
1264                 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1265                         s->notify_access = NOTIFY_MAIN;
1266
1267                 if (s->type == SERVICE_DBUS || s->bus_name) {
1268                         r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES,
1269                                                               SPECIAL_DBUS_SOCKET, NULL, true);
1270                         if (r < 0)
1271                                 return r;
1272                 }
1273
1274                 if (UNIT(s)->default_dependencies) {
1275                         r = service_add_default_dependencies(s);
1276                         if (r < 0)
1277                                 return r;
1278                 }
1279
1280                 r = unit_exec_context_defaults(u, &s->exec_context);
1281                 if (r < 0)
1282                         return r;
1283         }
1284
1285         return service_verify(s);
1286 }
1287
1288 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1289
1290         ServiceExecCommand c;
1291         Service *s = SERVICE(u);
1292         const char *prefix2;
1293         _cleanup_free_ char *p2 = NULL;
1294
1295         assert(s);
1296
1297         p2 = strappend(prefix, "\t");
1298         prefix2 = p2 ? p2 : prefix;
1299
1300         fprintf(f,
1301                 "%sService State: %s\n"
1302                 "%sResult: %s\n"
1303                 "%sReload Result: %s\n"
1304                 "%sPermissionsStartOnly: %s\n"
1305                 "%sRootDirectoryStartOnly: %s\n"
1306                 "%sRemainAfterExit: %s\n"
1307                 "%sGuessMainPID: %s\n"
1308                 "%sType: %s\n"
1309                 "%sRestart: %s\n"
1310                 "%sNotifyAccess: %s\n",
1311                 prefix, service_state_to_string(s->state),
1312                 prefix, service_result_to_string(s->result),
1313                 prefix, service_result_to_string(s->reload_result),
1314                 prefix, yes_no(s->permissions_start_only),
1315                 prefix, yes_no(s->root_directory_start_only),
1316                 prefix, yes_no(s->remain_after_exit),
1317                 prefix, yes_no(s->guess_main_pid),
1318                 prefix, service_type_to_string(s->type),
1319                 prefix, service_restart_to_string(s->restart),
1320                 prefix, notify_access_to_string(s->notify_access));
1321
1322         if (s->control_pid > 0)
1323                 fprintf(f,
1324                         "%sControl PID: %lu\n",
1325                         prefix, (unsigned long) s->control_pid);
1326
1327         if (s->main_pid > 0)
1328                 fprintf(f,
1329                         "%sMain PID: %lu\n"
1330                         "%sMain PID Known: %s\n"
1331                         "%sMain PID Alien: %s\n",
1332                         prefix, (unsigned long) s->main_pid,
1333                         prefix, yes_no(s->main_pid_known),
1334                         prefix, yes_no(s->main_pid_alien));
1335
1336         if (s->pid_file)
1337                 fprintf(f,
1338                         "%sPIDFile: %s\n",
1339                         prefix, s->pid_file);
1340
1341         if (s->bus_name)
1342                 fprintf(f,
1343                         "%sBusName: %s\n"
1344                         "%sBus Name Good: %s\n",
1345                         prefix, s->bus_name,
1346                         prefix, yes_no(s->bus_name_good));
1347
1348         kill_context_dump(&s->kill_context, f, prefix);
1349         exec_context_dump(&s->exec_context, f, prefix);
1350
1351         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1352
1353                 if (!s->exec_command[c])
1354                         continue;
1355
1356                 fprintf(f, "%s-> %s:\n",
1357                         prefix, service_exec_command_to_string(c));
1358
1359                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1360         }
1361
1362 #ifdef HAVE_SYSV_COMPAT
1363         if (s->is_sysv)
1364                 fprintf(f,
1365                         "%sSysV Init Script has LSB Header: %s\n"
1366                         "%sSysVEnabled: %s\n",
1367                         prefix, yes_no(s->sysv_has_lsb),
1368                         prefix, yes_no(s->sysv_enabled));
1369
1370         if (s->sysv_start_priority >= 0)
1371                 fprintf(f,
1372                         "%sSysVStartPriority: %i\n",
1373                         prefix, s->sysv_start_priority);
1374
1375         if (s->sysv_runlevels)
1376                 fprintf(f, "%sSysVRunLevels: %s\n",
1377                         prefix, s->sysv_runlevels);
1378 #endif
1379
1380         if (s->fsck_passno > 0)
1381                 fprintf(f,
1382                         "%sFsckPassNo: %i\n",
1383                         prefix, s->fsck_passno);
1384
1385         if (s->status_text)
1386                 fprintf(f, "%sStatus Text: %s\n",
1387                         prefix, s->status_text);
1388 }
1389
1390 static int service_load_pid_file(Service *s, bool may_warn) {
1391         _cleanup_free_ char *k = NULL;
1392         int r;
1393         pid_t pid;
1394
1395         assert(s);
1396
1397         if (!s->pid_file)
1398                 return -ENOENT;
1399
1400         r = read_one_line_file(s->pid_file, &k);
1401         if (r < 0) {
1402                 if (may_warn)
1403                         log_info_unit(UNIT(s)->id,
1404                                       "PID file %s not readable (yet?) after %s.",
1405                                       s->pid_file, service_state_to_string(s->state));
1406                 return r;
1407         }
1408
1409         r = parse_pid(k, &pid);
1410         if (r < 0) {
1411                 if (may_warn)
1412                         log_info_unit(UNIT(s)->id,
1413                                       "Failed to read PID from file %s: %s",
1414                                       s->pid_file, strerror(-r));
1415                 return r;
1416         }
1417
1418         if (kill(pid, 0) < 0 && errno != EPERM) {
1419                 if (may_warn)
1420                         log_info_unit(UNIT(s)->id,
1421                                       "PID %lu read from file %s does not exist.",
1422                                       (unsigned long) pid, s->pid_file);
1423                 return -ESRCH;
1424         }
1425
1426         if (s->main_pid_known) {
1427                 if (pid == s->main_pid)
1428                         return 0;
1429
1430                 log_debug_unit(UNIT(s)->id,
1431                                "Main PID changing: %lu -> %lu",
1432                                (unsigned long) s->main_pid, (unsigned long) pid);
1433                 service_unwatch_main_pid(s);
1434                 s->main_pid_known = false;
1435         } else
1436                 log_debug_unit(UNIT(s)->id,
1437                                "Main PID loaded: %lu", (unsigned long) pid);
1438
1439         r = service_set_main_pid(s, pid);
1440         if (r < 0)
1441                 return r;
1442
1443         r = unit_watch_pid(UNIT(s), pid);
1444         if (r < 0) {
1445                 /* FIXME: we need to do something here */
1446                 log_warning_unit(UNIT(s)->id,
1447                                  "Failed to watch PID %lu from service %s",
1448                                  (unsigned long) pid, UNIT(s)->id);
1449                 return r;
1450         }
1451
1452         return 0;
1453 }
1454
1455 static int service_search_main_pid(Service *s) {
1456         pid_t pid;
1457         int r;
1458
1459         assert(s);
1460
1461         /* If we know it anyway, don't ever fallback to unreliable
1462          * heuristics */
1463         if (s->main_pid_known)
1464                 return 0;
1465
1466         if (!s->guess_main_pid)
1467                 return 0;
1468
1469         assert(s->main_pid <= 0);
1470
1471         pid = unit_search_main_pid(UNIT(s));
1472         if (pid <= 0)
1473                 return -ENOENT;
1474
1475         log_debug_unit(UNIT(s)->id,
1476                        "Main PID guessed: %lu", (unsigned long) pid);
1477         r = service_set_main_pid(s, pid);
1478         if (r < 0)
1479                 return r;
1480
1481         r = unit_watch_pid(UNIT(s), pid);
1482         if (r < 0)
1483                 /* FIXME: we need to do something here */
1484                 log_warning_unit(UNIT(s)->id,
1485                                  "Failed to watch PID %lu from service %s",
1486                                  (unsigned long) pid, UNIT(s)->id);
1487                 return r;
1488
1489         return 0;
1490 }
1491
1492 static void service_notify_sockets_dead(Service *s, bool failed_permanent) {
1493         Iterator i;
1494         Unit *u;
1495
1496         assert(s);
1497
1498         /* Notifies all our sockets when we die */
1499
1500         if (s->socket_fd >= 0)
1501                 return;
1502
1503         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i)
1504                 if (u->type == UNIT_SOCKET)
1505                         socket_notify_service_dead(SOCKET(u), failed_permanent);
1506
1507         return;
1508 }
1509
1510 static void service_set_state(Service *s, ServiceState state) {
1511         ServiceState old_state;
1512         const UnitActiveState *table;
1513         assert(s);
1514
1515         table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1516
1517         old_state = s->state;
1518         s->state = state;
1519
1520         service_unwatch_pid_file(s);
1521
1522         if (state != SERVICE_START_PRE &&
1523             state != SERVICE_START &&
1524             state != SERVICE_START_POST &&
1525             state != SERVICE_RELOAD &&
1526             state != SERVICE_STOP &&
1527             state != SERVICE_STOP_SIGTERM &&
1528             state != SERVICE_STOP_SIGKILL &&
1529             state != SERVICE_STOP_POST &&
1530             state != SERVICE_FINAL_SIGTERM &&
1531             state != SERVICE_FINAL_SIGKILL &&
1532             state != SERVICE_AUTO_RESTART)
1533                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1534
1535         if (state != SERVICE_START &&
1536             state != SERVICE_START_POST &&
1537             state != SERVICE_RUNNING &&
1538             state != SERVICE_RELOAD &&
1539             state != SERVICE_STOP &&
1540             state != SERVICE_STOP_SIGTERM &&
1541             state != SERVICE_STOP_SIGKILL) {
1542                 service_unwatch_main_pid(s);
1543                 s->main_command = NULL;
1544         }
1545
1546         if (state != SERVICE_START_PRE &&
1547             state != SERVICE_START &&
1548             state != SERVICE_START_POST &&
1549             state != SERVICE_RELOAD &&
1550             state != SERVICE_STOP &&
1551             state != SERVICE_STOP_SIGTERM &&
1552             state != SERVICE_STOP_SIGKILL &&
1553             state != SERVICE_STOP_POST &&
1554             state != SERVICE_FINAL_SIGTERM &&
1555             state != SERVICE_FINAL_SIGKILL) {
1556                 service_unwatch_control_pid(s);
1557                 s->control_command = NULL;
1558                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1559         }
1560
1561         if (state == SERVICE_FAILED)
1562                 service_notify_sockets_dead(s, s->result == SERVICE_FAILURE_START_LIMIT);
1563
1564         if (state == SERVICE_DEAD ||
1565             state == SERVICE_STOP ||
1566             state == SERVICE_STOP_SIGTERM ||
1567             state == SERVICE_STOP_SIGKILL ||
1568             state == SERVICE_STOP_POST ||
1569             state == SERVICE_FINAL_SIGTERM ||
1570             state == SERVICE_FINAL_SIGKILL ||
1571             state == SERVICE_AUTO_RESTART)
1572                 service_notify_sockets_dead(s, false);
1573
1574         if (state != SERVICE_START_PRE &&
1575             state != SERVICE_START &&
1576             state != SERVICE_START_POST &&
1577             state != SERVICE_RUNNING &&
1578             state != SERVICE_RELOAD &&
1579             state != SERVICE_STOP &&
1580             state != SERVICE_STOP_SIGTERM &&
1581             state != SERVICE_STOP_SIGKILL &&
1582             state != SERVICE_STOP_POST &&
1583             state != SERVICE_FINAL_SIGTERM &&
1584             state != SERVICE_FINAL_SIGKILL &&
1585             !(state == SERVICE_DEAD && UNIT(s)->job)) {
1586                 service_close_socket_fd(s);
1587                 service_connection_unref(s);
1588         }
1589
1590         if (state == SERVICE_STOP || state == SERVICE_STOP_SIGTERM)
1591                 service_stop_watchdog(s);
1592
1593         /* For the inactive states unit_notify() will trim the cgroup,
1594          * but for exit we have to do that ourselves... */
1595         if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1596                 unit_destroy_cgroup(UNIT(s));
1597
1598         if (old_state != state)
1599                 log_debug_unit(UNIT(s)->id,
1600                                "%s changed %s -> %s", UNIT(s)->id,
1601                                service_state_to_string(old_state),
1602                                service_state_to_string(state));
1603
1604         unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1605         s->reload_result = SERVICE_SUCCESS;
1606 }
1607
1608 static int service_coldplug(Unit *u) {
1609         Service *s = SERVICE(u);
1610         int r;
1611
1612         assert(s);
1613         assert(s->state == SERVICE_DEAD);
1614
1615         if (s->deserialized_state != s->state) {
1616
1617                 if (s->deserialized_state == SERVICE_START_PRE ||
1618                     s->deserialized_state == SERVICE_START ||
1619                     s->deserialized_state == SERVICE_START_POST ||
1620                     s->deserialized_state == SERVICE_RELOAD ||
1621                     s->deserialized_state == SERVICE_STOP ||
1622                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1623                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1624                     s->deserialized_state == SERVICE_STOP_POST ||
1625                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1626                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1627                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1628
1629                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_start_usec > 0) {
1630                                 usec_t k;
1631
1632                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_start_usec;
1633
1634                                 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, k, &s->timer_watch);
1635                                 if (r < 0)
1636                                         return r;
1637                         }
1638                 }
1639
1640                 if ((s->deserialized_state == SERVICE_START &&
1641                      (s->type == SERVICE_FORKING ||
1642                       s->type == SERVICE_DBUS ||
1643                       s->type == SERVICE_ONESHOT ||
1644                       s->type == SERVICE_NOTIFY)) ||
1645                     s->deserialized_state == SERVICE_START_POST ||
1646                     s->deserialized_state == SERVICE_RUNNING ||
1647                     s->deserialized_state == SERVICE_RELOAD ||
1648                     s->deserialized_state == SERVICE_STOP ||
1649                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1650                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1651                         if (s->main_pid > 0) {
1652                                 r = unit_watch_pid(UNIT(s), s->main_pid);
1653                                 if (r < 0)
1654                                         return r;
1655                         }
1656
1657                 if (s->deserialized_state == SERVICE_START_PRE ||
1658                     s->deserialized_state == SERVICE_START ||
1659                     s->deserialized_state == SERVICE_START_POST ||
1660                     s->deserialized_state == SERVICE_RELOAD ||
1661                     s->deserialized_state == SERVICE_STOP ||
1662                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1663                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1664                     s->deserialized_state == SERVICE_STOP_POST ||
1665                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1666                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1667                         if (s->control_pid > 0) {
1668                                 r = unit_watch_pid(UNIT(s), s->control_pid);
1669                                 if (r < 0)
1670                                         return r;
1671                         }
1672
1673                 if (s->deserialized_state == SERVICE_START_POST ||
1674                     s->deserialized_state == SERVICE_RUNNING)
1675                         service_handle_watchdog(s);
1676
1677                 service_set_state(s, s->deserialized_state);
1678         }
1679         return 0;
1680 }
1681
1682 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1683         Iterator i;
1684         int r;
1685         int *rfds = NULL;
1686         unsigned rn_fds = 0;
1687         Unit *u;
1688
1689         assert(s);
1690         assert(fds);
1691         assert(n_fds);
1692
1693         if (s->socket_fd >= 0)
1694                 return 0;
1695
1696         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1697                 int *cfds;
1698                 unsigned cn_fds;
1699                 Socket *sock;
1700
1701                 if (u->type != UNIT_SOCKET)
1702                         continue;
1703
1704                 sock = SOCKET(u);
1705
1706                 r = socket_collect_fds(sock, &cfds, &cn_fds);
1707                 if (r < 0)
1708                         goto fail;
1709
1710                 if (!cfds)
1711                         continue;
1712
1713                 if (!rfds) {
1714                         rfds = cfds;
1715                         rn_fds = cn_fds;
1716                 } else {
1717                         int *t;
1718
1719                         t = new(int, rn_fds+cn_fds);
1720                         if (!t) {
1721                                 free(cfds);
1722                                 r = -ENOMEM;
1723                                 goto fail;
1724                         }
1725
1726                         memcpy(t, rfds, rn_fds * sizeof(int));
1727                         memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1728                         free(rfds);
1729                         free(cfds);
1730
1731                         rfds = t;
1732                         rn_fds = rn_fds+cn_fds;
1733                 }
1734         }
1735
1736         *fds = rfds;
1737         *n_fds = rn_fds;
1738
1739         return 0;
1740
1741 fail:
1742         free(rfds);
1743
1744         return r;
1745 }
1746
1747 static int service_spawn(
1748                 Service *s,
1749                 ExecCommand *c,
1750                 bool timeout,
1751                 bool pass_fds,
1752                 bool apply_permissions,
1753                 bool apply_chroot,
1754                 bool apply_tty_stdin,
1755                 bool set_notify_socket,
1756                 bool is_control,
1757                 pid_t *_pid) {
1758
1759         pid_t pid;
1760         int r;
1761         int *fds = NULL;
1762         _cleanup_free_ int *fdsbuf = NULL;
1763         unsigned n_fds = 0, n_env = 0;
1764         _cleanup_strv_free_ char
1765                 **argv = NULL, **final_env = NULL, **our_env = NULL;
1766         const char *path;
1767
1768         assert(s);
1769         assert(c);
1770         assert(_pid);
1771
1772         unit_realize_cgroup(UNIT(s));
1773
1774         if (pass_fds ||
1775             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1776             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1777             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1778
1779                 if (s->socket_fd >= 0) {
1780                         fds = &s->socket_fd;
1781                         n_fds = 1;
1782                 } else {
1783                         r = service_collect_fds(s, &fdsbuf, &n_fds);
1784                         if (r < 0)
1785                                 goto fail;
1786
1787                         fds = fdsbuf;
1788                 }
1789         }
1790
1791         if (timeout && s->timeout_start_usec) {
1792                 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true,
1793                                      s->timeout_start_usec, &s->timer_watch);
1794                 if (r < 0)
1795                         goto fail;
1796         } else
1797                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1798
1799         argv = unit_full_printf_strv(UNIT(s), c->argv);
1800         if (!argv) {
1801                 r = -ENOMEM;
1802                 goto fail;
1803         }
1804
1805         our_env = new0(char*, 5);
1806         if (!our_env) {
1807                 r = -ENOMEM;
1808                 goto fail;
1809         }
1810
1811         if (set_notify_socket)
1812                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1813                         r = -ENOMEM;
1814                         goto fail;
1815                 }
1816
1817         if (s->main_pid > 0)
1818                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1819                         r = -ENOMEM;
1820                         goto fail;
1821                 }
1822
1823         if (s->watchdog_usec > 0)
1824                 if (asprintf(our_env + n_env++, "WATCHDOG_USEC=%llu", (unsigned long long) s->watchdog_usec) < 0) {
1825                         r = -ENOMEM;
1826                         goto fail;
1827                 }
1828
1829         if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
1830                 if (asprintf(our_env + n_env++, "MANAGERPID=%lu", (unsigned long) getpid()) < 0) {
1831                         r = -ENOMEM;
1832                         goto fail;
1833                 }
1834
1835         final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1836         if (!final_env) {
1837                 r = -ENOMEM;
1838                 goto fail;
1839         }
1840
1841         if (is_control && UNIT(s)->cgroup_path) {
1842                 path = strappenda(UNIT(s)->cgroup_path, "/control");
1843                 cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1844         } else
1845                 path = UNIT(s)->cgroup_path;
1846
1847         r = exec_spawn(c,
1848                        argv,
1849                        &s->exec_context,
1850                        fds, n_fds,
1851                        final_env,
1852                        apply_permissions,
1853                        apply_chroot,
1854                        apply_tty_stdin,
1855                        UNIT(s)->manager->confirm_spawn,
1856                        UNIT(s)->cgroup_mask,
1857                        path,
1858                        UNIT(s)->id,
1859                        s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
1860                        &pid);
1861         if (r < 0)
1862                 goto fail;
1863
1864         r = unit_watch_pid(UNIT(s), pid);
1865         if (r < 0)
1866                 /* FIXME: we need to do something here */
1867                 goto fail;
1868
1869         *_pid = pid;
1870
1871         return 0;
1872
1873 fail:
1874         if (timeout)
1875                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1876
1877         return r;
1878 }
1879
1880 static int main_pid_good(Service *s) {
1881         assert(s);
1882
1883         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1884          * don't know */
1885
1886         /* If we know the pid file, then lets just check if it is
1887          * still valid */
1888         if (s->main_pid_known) {
1889
1890                 /* If it's an alien child let's check if it is still
1891                  * alive ... */
1892                 if (s->main_pid_alien && s->main_pid > 0)
1893                         return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1894
1895                 /* .. otherwise assume we'll get a SIGCHLD for it,
1896                  * which we really should wait for to collect exit
1897                  * status and code */
1898                 return s->main_pid > 0;
1899         }
1900
1901         /* We don't know the pid */
1902         return -EAGAIN;
1903 }
1904
1905 _pure_ static int control_pid_good(Service *s) {
1906         assert(s);
1907
1908         return s->control_pid > 0;
1909 }
1910
1911 static int cgroup_good(Service *s) {
1912         int r;
1913
1914         assert(s);
1915
1916         if (!UNIT(s)->cgroup_path)
1917                 return 0;
1918
1919         r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
1920         if (r < 0)
1921                 return r;
1922
1923         return !r;
1924 }
1925
1926 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1927         int r;
1928         assert(s);
1929
1930         if (f != SERVICE_SUCCESS)
1931                 s->result = f;
1932
1933         service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1934
1935         if (allow_restart &&
1936             !s->forbid_restart &&
1937             (s->restart == SERVICE_RESTART_ALWAYS ||
1938              (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1939              (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1940              (s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
1941                                                          s->result == SERVICE_FAILURE_CORE_DUMP))) &&
1942             (s->result != SERVICE_FAILURE_EXIT_CODE ||
1943              !set_contains(s->restart_ignore_status.code, INT_TO_PTR(s->main_exec_status.status))) &&
1944             (s->result != SERVICE_FAILURE_SIGNAL ||
1945              !set_contains(s->restart_ignore_status.signal, INT_TO_PTR(s->main_exec_status.status)))
1946                 ) {
1947
1948                 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->restart_usec, &s->timer_watch);
1949                 if (r < 0)
1950                         goto fail;
1951
1952                 service_set_state(s, SERVICE_AUTO_RESTART);
1953         }
1954
1955         s->forbid_restart = false;
1956
1957         /* we want fresh tmpdirs in case service is started again immediately */
1958         exec_context_tmp_dirs_done(&s->exec_context);
1959
1960         /* Try to delete the pid file. At this point it will be
1961          * out-of-date, and some software might be confused by it, so
1962          * let's remove it. */
1963         if (s->pid_file)
1964                 unlink_noerrno(s->pid_file);
1965
1966         return;
1967
1968 fail:
1969         log_warning_unit(UNIT(s)->id,
1970                          "%s failed to run install restart timer: %s",
1971                          UNIT(s)->id, strerror(-r));
1972         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1973 }
1974
1975 static void service_enter_stop_post(Service *s, ServiceResult f) {
1976         int r;
1977         assert(s);
1978
1979         if (f != SERVICE_SUCCESS)
1980                 s->result = f;
1981
1982         service_unwatch_control_pid(s);
1983
1984         s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1985         if (s->control_command) {
1986                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1987
1988                 r = service_spawn(s,
1989                                   s->control_command,
1990                                   true,
1991                                   false,
1992                                   !s->permissions_start_only,
1993                                   !s->root_directory_start_only,
1994                                   true,
1995                                   false,
1996                                   true,
1997                                   &s->control_pid);
1998                 if (r < 0)
1999                         goto fail;
2000
2001
2002                 service_set_state(s, SERVICE_STOP_POST);
2003         } else
2004                 service_enter_dead(s, SERVICE_SUCCESS, true);
2005
2006         return;
2007
2008 fail:
2009         log_warning_unit(UNIT(s)->id,
2010                          "%s failed to run 'stop-post' task: %s",
2011                          UNIT(s)->id, strerror(-r));
2012         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2013 }
2014
2015 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
2016         int r;
2017
2018         assert(s);
2019
2020         if (f != SERVICE_SUCCESS)
2021                 s->result = f;
2022
2023         r = unit_kill_context(
2024                         UNIT(s),
2025                         &s->kill_context,
2026                         state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM,
2027                         s->main_pid,
2028                         s->control_pid,
2029                         s->main_pid_alien);
2030         if (r < 0)
2031                 goto fail;
2032
2033         if (r > 0) {
2034                 if (s->timeout_stop_usec > 0) {
2035                         r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true,
2036                                              s->timeout_stop_usec, &s->timer_watch);
2037                         if (r < 0)
2038                                 goto fail;
2039                 }
2040
2041                 service_set_state(s, state);
2042         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
2043                 service_enter_stop_post(s, SERVICE_SUCCESS);
2044         else
2045                 service_enter_dead(s, SERVICE_SUCCESS, true);
2046
2047         return;
2048
2049 fail:
2050         log_warning_unit(UNIT(s)->id,
2051                          "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
2052
2053         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
2054                 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
2055         else
2056                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2057 }
2058
2059 static void service_enter_stop(Service *s, ServiceResult f) {
2060         int r;
2061
2062         assert(s);
2063
2064         if (f != SERVICE_SUCCESS)
2065                 s->result = f;
2066
2067         service_unwatch_control_pid(s);
2068
2069         s->control_command = s->exec_command[SERVICE_EXEC_STOP];
2070         if (s->control_command) {
2071                 s->control_command_id = SERVICE_EXEC_STOP;
2072
2073                 r = service_spawn(s,
2074                                   s->control_command,
2075                                   true,
2076                                   false,
2077                                   !s->permissions_start_only,
2078                                   !s->root_directory_start_only,
2079                                   false,
2080                                   false,
2081                                   true,
2082                                   &s->control_pid);
2083                 if (r < 0)
2084                         goto fail;
2085
2086                 service_set_state(s, SERVICE_STOP);
2087         } else
2088                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2089
2090         return;
2091
2092 fail:
2093         log_warning_unit(UNIT(s)->id,
2094                          "%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2095         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2096 }
2097
2098 static void service_enter_running(Service *s, ServiceResult f) {
2099         int main_pid_ok, cgroup_ok;
2100         assert(s);
2101
2102         if (f != SERVICE_SUCCESS)
2103                 s->result = f;
2104
2105         main_pid_ok = main_pid_good(s);
2106         cgroup_ok = cgroup_good(s);
2107
2108         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2109             (s->bus_name_good || s->type != SERVICE_DBUS))
2110                 service_set_state(s, SERVICE_RUNNING);
2111         else if (s->remain_after_exit)
2112                 service_set_state(s, SERVICE_EXITED);
2113         else
2114                 service_enter_stop(s, SERVICE_SUCCESS);
2115 }
2116
2117 static void service_enter_start_post(Service *s) {
2118         int r;
2119         assert(s);
2120
2121         service_unwatch_control_pid(s);
2122
2123         if (s->watchdog_usec > 0)
2124                 service_reset_watchdog(s);
2125
2126         s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
2127         if (s->control_command) {
2128                 s->control_command_id = SERVICE_EXEC_START_POST;
2129
2130                 r = service_spawn(s,
2131                                   s->control_command,
2132                                   true,
2133                                   false,
2134                                   !s->permissions_start_only,
2135                                   !s->root_directory_start_only,
2136                                   false,
2137                                   false,
2138                                   true,
2139                                   &s->control_pid);
2140                 if (r < 0)
2141                         goto fail;
2142
2143                 service_set_state(s, SERVICE_START_POST);
2144         } else
2145                 service_enter_running(s, SERVICE_SUCCESS);
2146
2147         return;
2148
2149 fail:
2150         log_warning_unit(UNIT(s)->id,
2151                          "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2152         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2153 }
2154
2155 static void service_kill_control_processes(Service *s) {
2156         char *p;
2157
2158         if (!UNIT(s)->cgroup_path)
2159                 return;
2160
2161         p = strappenda(UNIT(s)->cgroup_path, "/control");
2162         cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL);
2163 }
2164
2165 static void service_enter_start(Service *s) {
2166         ExecCommand *c;
2167         pid_t pid;
2168         int r;
2169
2170         assert(s);
2171
2172         assert(s->exec_command[SERVICE_EXEC_START]);
2173         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2174
2175         service_unwatch_control_pid(s);
2176         service_unwatch_main_pid(s);
2177
2178         /* We want to ensure that nobody leaks processes from
2179          * START_PRE here, so let's go on a killing spree, People
2180          * should not spawn long running processes from START_PRE. */
2181         service_kill_control_processes(s);
2182
2183         if (s->type == SERVICE_FORKING) {
2184                 s->control_command_id = SERVICE_EXEC_START;
2185                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2186
2187                 s->main_command = NULL;
2188         } else {
2189                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2190                 s->control_command = NULL;
2191
2192                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2193         }
2194
2195         r = service_spawn(s,
2196                           c,
2197                           s->type == SERVICE_FORKING || s->type == SERVICE_DBUS ||
2198                             s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
2199                           true,
2200                           true,
2201                           true,
2202                           true,
2203                           s->notify_access != NOTIFY_NONE,
2204                           false,
2205                           &pid);
2206         if (r < 0)
2207                 goto fail;
2208
2209         if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
2210                 /* For simple services we immediately start
2211                  * the START_POST binaries. */
2212
2213                 service_set_main_pid(s, pid);
2214                 service_enter_start_post(s);
2215
2216         } else  if (s->type == SERVICE_FORKING) {
2217
2218                 /* For forking services we wait until the start
2219                  * process exited. */
2220
2221                 s->control_pid = pid;
2222                 service_set_state(s, SERVICE_START);
2223
2224         } else if (s->type == SERVICE_ONESHOT ||
2225                    s->type == SERVICE_DBUS ||
2226                    s->type == SERVICE_NOTIFY) {
2227
2228                 /* For oneshot services we wait until the start
2229                  * process exited, too, but it is our main process. */
2230
2231                 /* For D-Bus services we know the main pid right away,
2232                  * but wait for the bus name to appear on the
2233                  * bus. Notify services are similar. */
2234
2235                 service_set_main_pid(s, pid);
2236                 service_set_state(s, SERVICE_START);
2237         } else
2238                 assert_not_reached("Unknown service type");
2239
2240         return;
2241
2242 fail:
2243         log_warning_unit(UNIT(s)->id,
2244                          "%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2245         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2246 }
2247
2248 static void service_enter_start_pre(Service *s) {
2249         int r;
2250
2251         assert(s);
2252
2253         service_unwatch_control_pid(s);
2254
2255         s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
2256         if (s->control_command) {
2257                 /* Before we start anything, let's clear up what might
2258                  * be left from previous runs. */
2259                 service_kill_control_processes(s);
2260
2261                 s->control_command_id = SERVICE_EXEC_START_PRE;
2262
2263                 r = service_spawn(s,
2264                                   s->control_command,
2265                                   true,
2266                                   false,
2267                                   !s->permissions_start_only,
2268                                   !s->root_directory_start_only,
2269                                   true,
2270                                   false,
2271                                   true,
2272                                   &s->control_pid);
2273                 if (r < 0)
2274                         goto fail;
2275
2276                 service_set_state(s, SERVICE_START_PRE);
2277         } else
2278                 service_enter_start(s);
2279
2280         return;
2281
2282 fail:
2283         log_warning_unit(UNIT(s)->id,
2284                          "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2285         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2286 }
2287
2288 static void service_enter_restart(Service *s) {
2289         int r;
2290         DBusError error;
2291
2292         assert(s);
2293         dbus_error_init(&error);
2294
2295         if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2296                 /* Don't restart things if we are going down anyway */
2297                 log_info_unit(UNIT(s)->id,
2298                               "Stop job pending for unit, delaying automatic restart.");
2299
2300                 r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->restart_usec, &s->timer_watch);
2301                 if (r < 0)
2302                         goto fail;
2303
2304                 return;
2305         }
2306
2307         /* Any units that are bound to this service must also be
2308          * restarted. We use JOB_RESTART (instead of the more obvious
2309          * JOB_START) here so that those dependency jobs will be added
2310          * as well. */
2311         r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
2312         if (r < 0)
2313                 goto fail;
2314
2315         /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2316          * it will be canceled as part of the service_stop() call that
2317          * is executed as part of JOB_RESTART. */
2318
2319         log_debug_unit(UNIT(s)->id,
2320                        "%s scheduled restart job.", UNIT(s)->id);
2321         return;
2322
2323 fail:
2324         log_warning_unit(UNIT(s)->id,
2325                          "%s failed to schedule restart job: %s",
2326                          UNIT(s)->id, bus_error(&error, -r));
2327         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2328
2329         dbus_error_free(&error);
2330 }
2331
2332 static void service_enter_reload(Service *s) {
2333         int r;
2334
2335         assert(s);
2336
2337         service_unwatch_control_pid(s);
2338
2339         s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2340         if (s->control_command) {
2341                 s->control_command_id = SERVICE_EXEC_RELOAD;
2342
2343                 r = service_spawn(s,
2344                                   s->control_command,
2345                                   true,
2346                                   false,
2347                                   !s->permissions_start_only,
2348                                   !s->root_directory_start_only,
2349                                   false,
2350                                   false,
2351                                   true,
2352                                   &s->control_pid);
2353                 if (r < 0)
2354                         goto fail;
2355
2356                 service_set_state(s, SERVICE_RELOAD);
2357         } else
2358                 service_enter_running(s, SERVICE_SUCCESS);
2359
2360         return;
2361
2362 fail:
2363         log_warning_unit(UNIT(s)->id,
2364                          "%s failed to run 'reload' task: %s",
2365                          UNIT(s)->id, strerror(-r));
2366         s->reload_result = SERVICE_FAILURE_RESOURCES;
2367         service_enter_running(s, SERVICE_SUCCESS);
2368 }
2369
2370 static void service_run_next_control(Service *s) {
2371         int r;
2372
2373         assert(s);
2374         assert(s->control_command);
2375         assert(s->control_command->command_next);
2376
2377         assert(s->control_command_id != SERVICE_EXEC_START);
2378
2379         s->control_command = s->control_command->command_next;
2380         service_unwatch_control_pid(s);
2381
2382         r = service_spawn(s,
2383                           s->control_command,
2384                           true,
2385                           false,
2386                           !s->permissions_start_only,
2387                           !s->root_directory_start_only,
2388                           s->control_command_id == SERVICE_EXEC_START_PRE ||
2389                           s->control_command_id == SERVICE_EXEC_STOP_POST,
2390                           false,
2391                           true,
2392                           &s->control_pid);
2393         if (r < 0)
2394                 goto fail;
2395
2396         return;
2397
2398 fail:
2399         log_warning_unit(UNIT(s)->id,
2400                          "%s failed to run next control task: %s",
2401                          UNIT(s)->id, strerror(-r));
2402
2403         if (s->state == SERVICE_START_PRE)
2404                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2405         else if (s->state == SERVICE_STOP)
2406                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2407         else if (s->state == SERVICE_STOP_POST)
2408                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2409         else if (s->state == SERVICE_RELOAD) {
2410                 s->reload_result = SERVICE_FAILURE_RESOURCES;
2411                 service_enter_running(s, SERVICE_SUCCESS);
2412         } else
2413                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2414 }
2415
2416 static void service_run_next_main(Service *s) {
2417         pid_t pid;
2418         int r;
2419
2420         assert(s);
2421         assert(s->main_command);
2422         assert(s->main_command->command_next);
2423         assert(s->type == SERVICE_ONESHOT);
2424
2425         s->main_command = s->main_command->command_next;
2426         service_unwatch_main_pid(s);
2427
2428         r = service_spawn(s,
2429                           s->main_command,
2430                           true,
2431                           true,
2432                           true,
2433                           true,
2434                           true,
2435                           s->notify_access != NOTIFY_NONE,
2436                           false,
2437                           &pid);
2438         if (r < 0)
2439                 goto fail;
2440
2441         service_set_main_pid(s, pid);
2442
2443         return;
2444
2445 fail:
2446         log_warning_unit(UNIT(s)->id,
2447                          "%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2448         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2449 }
2450
2451 static int service_start_limit_test(Service *s) {
2452         assert(s);
2453
2454         if (ratelimit_test(&s->start_limit))
2455                 return 0;
2456
2457         switch (s->start_limit_action) {
2458
2459         case SERVICE_START_LIMIT_NONE:
2460                 log_warning_unit(UNIT(s)->id,
2461                                  "%s start request repeated too quickly, refusing to start.",
2462                                  UNIT(s)->id);
2463                 break;
2464
2465         case SERVICE_START_LIMIT_REBOOT: {
2466                 DBusError error;
2467                 int r;
2468
2469                 dbus_error_init(&error);
2470
2471                 log_warning_unit(UNIT(s)->id,
2472                                  "%s start request repeated too quickly, rebooting.", UNIT(s)->id);
2473
2474                 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START,
2475                                             SPECIAL_REBOOT_TARGET, JOB_REPLACE,
2476                                             true, &error, NULL);
2477                 if (r < 0) {
2478                         log_error_unit(UNIT(s)->id,
2479                                        "Failed to reboot: %s.", bus_error(&error, r));
2480                         dbus_error_free(&error);
2481                 }
2482
2483                 break;
2484         }
2485
2486         case SERVICE_START_LIMIT_REBOOT_FORCE:
2487                 log_warning_unit(UNIT(s)->id,
2488                                  "%s start request repeated too quickly, forcibly rebooting.", UNIT(s)->id);
2489                 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2490                 break;
2491
2492         case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
2493                 log_warning_unit(UNIT(s)->id,
2494                                  "%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
2495                 sync();
2496                 reboot(RB_AUTOBOOT);
2497                 break;
2498
2499         default:
2500                 log_error_unit(UNIT(s)->id,
2501                                "start limit action=%i", s->start_limit_action);
2502                 assert_not_reached("Unknown StartLimitAction.");
2503         }
2504
2505         return -ECANCELED;
2506 }
2507
2508 static int service_start(Unit *u) {
2509         Service *s = SERVICE(u);
2510         int r;
2511
2512         assert(s);
2513
2514         /* We cannot fulfill this request right now, try again later
2515          * please! */
2516         if (s->state == SERVICE_STOP ||
2517             s->state == SERVICE_STOP_SIGTERM ||
2518             s->state == SERVICE_STOP_SIGKILL ||
2519             s->state == SERVICE_STOP_POST ||
2520             s->state == SERVICE_FINAL_SIGTERM ||
2521             s->state == SERVICE_FINAL_SIGKILL)
2522                 return -EAGAIN;
2523
2524         /* Already on it! */
2525         if (s->state == SERVICE_START_PRE ||
2526             s->state == SERVICE_START ||
2527             s->state == SERVICE_START_POST)
2528                 return 0;
2529
2530         /* A service that will be restarted must be stopped first to
2531          * trigger BindsTo and/or OnFailure dependencies. If a user
2532          * does not want to wait for the holdoff time to elapse, the
2533          * service should be manually restarted, not started. We
2534          * simply return EAGAIN here, so that any start jobs stay
2535          * queued, and assume that the auto restart timer will
2536          * eventually trigger the restart. */
2537         if (s->state == SERVICE_AUTO_RESTART)
2538                 return -EAGAIN;
2539
2540         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
2541
2542         /* Make sure we don't enter a busy loop of some kind. */
2543         r = service_start_limit_test(s);
2544         if (r < 0) {
2545                 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
2546                 return r;
2547         }
2548
2549         s->result = SERVICE_SUCCESS;
2550         s->reload_result = SERVICE_SUCCESS;
2551         s->main_pid_known = false;
2552         s->main_pid_alien = false;
2553         s->forbid_restart = false;
2554
2555         service_enter_start_pre(s);
2556         return 0;
2557 }
2558
2559 static int service_stop(Unit *u) {
2560         Service *s = SERVICE(u);
2561
2562         assert(s);
2563
2564         /* Don't create restart jobs from here. */
2565         s->forbid_restart = true;
2566
2567         /* Already on it */
2568         if (s->state == SERVICE_STOP ||
2569             s->state == SERVICE_STOP_SIGTERM ||
2570             s->state == SERVICE_STOP_SIGKILL ||
2571             s->state == SERVICE_STOP_POST ||
2572             s->state == SERVICE_FINAL_SIGTERM ||
2573             s->state == SERVICE_FINAL_SIGKILL)
2574                 return 0;
2575
2576         /* A restart will be scheduled or is in progress. */
2577         if (s->state == SERVICE_AUTO_RESTART) {
2578                 service_set_state(s, SERVICE_DEAD);
2579                 return 0;
2580         }
2581
2582         /* If there's already something running we go directly into
2583          * kill mode. */
2584         if (s->state == SERVICE_START_PRE ||
2585             s->state == SERVICE_START ||
2586             s->state == SERVICE_START_POST ||
2587             s->state == SERVICE_RELOAD) {
2588                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2589                 return 0;
2590         }
2591
2592         assert(s->state == SERVICE_RUNNING ||
2593                s->state == SERVICE_EXITED);
2594
2595         service_enter_stop(s, SERVICE_SUCCESS);
2596         return 0;
2597 }
2598
2599 static int service_reload(Unit *u) {
2600         Service *s = SERVICE(u);
2601
2602         assert(s);
2603
2604         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2605
2606         service_enter_reload(s);
2607         return 0;
2608 }
2609
2610 _pure_ static bool service_can_reload(Unit *u) {
2611         Service *s = SERVICE(u);
2612
2613         assert(s);
2614
2615         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2616 }
2617
2618 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2619         Service *s = SERVICE(u);
2620
2621         assert(u);
2622         assert(f);
2623         assert(fds);
2624
2625         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2626         unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2627         unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2628
2629         if (s->control_pid > 0)
2630                 unit_serialize_item_format(u, f, "control-pid", "%lu",
2631                                            (unsigned long) s->control_pid);
2632
2633         if (s->main_pid_known && s->main_pid > 0)
2634                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2635
2636         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2637
2638         if (s->status_text)
2639                 unit_serialize_item(u, f, "status-text", s->status_text);
2640
2641         /* FIXME: There's a minor uncleanliness here: if there are
2642          * multiple commands attached here, we will start from the
2643          * first one again */
2644         if (s->control_command_id >= 0)
2645                 unit_serialize_item(u, f, "control-command",
2646                                     service_exec_command_to_string(s->control_command_id));
2647
2648         if (s->socket_fd >= 0) {
2649                 int copy;
2650
2651                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2652                         return copy;
2653
2654                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2655         }
2656
2657         if (s->main_exec_status.pid > 0) {
2658                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu",
2659                                            (unsigned long) s->main_exec_status.pid);
2660                 dual_timestamp_serialize(f, "main-exec-status-start",
2661                                          &s->main_exec_status.start_timestamp);
2662                 dual_timestamp_serialize(f, "main-exec-status-exit",
2663                                          &s->main_exec_status.exit_timestamp);
2664
2665                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2666                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
2667                                                    s->main_exec_status.code);
2668                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
2669                                                    s->main_exec_status.status);
2670                 }
2671         }
2672         if (dual_timestamp_is_set(&s->watchdog_timestamp))
2673                 dual_timestamp_serialize(f, "watchdog-timestamp",
2674                                          &s->watchdog_timestamp);
2675
2676         if (s->exec_context.tmp_dir)
2677                 unit_serialize_item(u, f, "tmp-dir", s->exec_context.tmp_dir);
2678
2679         if (s->exec_context.var_tmp_dir)
2680                 unit_serialize_item(u, f, "var-tmp-dir", s->exec_context.var_tmp_dir);
2681
2682         return 0;
2683 }
2684
2685 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2686         Service *s = SERVICE(u);
2687
2688         assert(u);
2689         assert(key);
2690         assert(value);
2691         assert(fds);
2692
2693         if (streq(key, "state")) {
2694                 ServiceState state;
2695
2696                 state = service_state_from_string(value);
2697                 if (state < 0)
2698                         log_debug_unit(u->id, "Failed to parse state value %s", value);
2699                 else
2700                         s->deserialized_state = state;
2701         } else if (streq(key, "result")) {
2702                 ServiceResult f;
2703
2704                 f = service_result_from_string(value);
2705                 if (f < 0)
2706                         log_debug_unit(u->id, "Failed to parse result value %s", value);
2707                 else if (f != SERVICE_SUCCESS)
2708                         s->result = f;
2709
2710         } else if (streq(key, "reload-result")) {
2711                 ServiceResult f;
2712
2713                 f = service_result_from_string(value);
2714                 if (f < 0)
2715                         log_debug_unit(u->id, "Failed to parse reload result value %s", value);
2716                 else if (f != SERVICE_SUCCESS)
2717                         s->reload_result = f;
2718
2719         } else if (streq(key, "control-pid")) {
2720                 pid_t pid;
2721
2722                 if (parse_pid(value, &pid) < 0)
2723                         log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
2724                 else
2725                         s->control_pid = pid;
2726         } else if (streq(key, "main-pid")) {
2727                 pid_t pid;
2728
2729                 if (parse_pid(value, &pid) < 0)
2730                         log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
2731                 else
2732                         service_set_main_pid(s, (pid_t) pid);
2733         } else if (streq(key, "main-pid-known")) {
2734                 int b;
2735
2736                 b = parse_boolean(value);
2737                 if (b < 0)
2738                         log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
2739                 else
2740                         s->main_pid_known = b;
2741         } else if (streq(key, "status-text")) {
2742                 char *t;
2743
2744                 t = strdup(value);
2745                 if (!t)
2746                         log_oom();
2747                 else {
2748                         free(s->status_text);
2749                         s->status_text = t;
2750                 }
2751
2752         } else if (streq(key, "control-command")) {
2753                 ServiceExecCommand id;
2754
2755                 id = service_exec_command_from_string(value);
2756                 if (id < 0)
2757                         log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
2758                 else {
2759                         s->control_command_id = id;
2760                         s->control_command = s->exec_command[id];
2761                 }
2762         } else if (streq(key, "socket-fd")) {
2763                 int fd;
2764
2765                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2766                         log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
2767                 else {
2768
2769                         if (s->socket_fd >= 0)
2770                                 close_nointr_nofail(s->socket_fd);
2771                         s->socket_fd = fdset_remove(fds, fd);
2772                 }
2773         } else if (streq(key, "main-exec-status-pid")) {
2774                 pid_t pid;
2775
2776                 if (parse_pid(value, &pid) < 0)
2777                         log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
2778                 else
2779                         s->main_exec_status.pid = pid;
2780         } else if (streq(key, "main-exec-status-code")) {
2781                 int i;
2782
2783                 if (safe_atoi(value, &i) < 0)
2784                         log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
2785                 else
2786                         s->main_exec_status.code = i;
2787         } else if (streq(key, "main-exec-status-status")) {
2788                 int i;
2789
2790                 if (safe_atoi(value, &i) < 0)
2791                         log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
2792                 else
2793                         s->main_exec_status.status = i;
2794         } else if (streq(key, "main-exec-status-start"))
2795                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2796         else if (streq(key, "main-exec-status-exit"))
2797                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2798         else if (streq(key, "watchdog-timestamp"))
2799                 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2800         else if (streq(key, "tmp-dir")) {
2801                 char *t;
2802
2803                 t = strdup(value);
2804                 if (!t)
2805                         return log_oom();
2806
2807                 s->exec_context.tmp_dir = t;
2808         } else if (streq(key, "var-tmp-dir")) {
2809                 char *t;
2810
2811                 t = strdup(value);
2812                 if (!t)
2813                         return log_oom();
2814
2815                 s->exec_context.var_tmp_dir = t;
2816         } else
2817                 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
2818
2819         return 0;
2820 }
2821
2822 _pure_ static UnitActiveState service_active_state(Unit *u) {
2823         const UnitActiveState *table;
2824
2825         assert(u);
2826
2827         table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2828
2829         return table[SERVICE(u)->state];
2830 }
2831
2832 static const char *service_sub_state_to_string(Unit *u) {
2833         assert(u);
2834
2835         return service_state_to_string(SERVICE(u)->state);
2836 }
2837
2838 static bool service_check_gc(Unit *u) {
2839         Service *s = SERVICE(u);
2840
2841         assert(s);
2842
2843         /* Never clean up services that still have a process around,
2844          * even if the service is formally dead. */
2845         if (cgroup_good(s) > 0 ||
2846             main_pid_good(s) > 0 ||
2847             control_pid_good(s) > 0)
2848                 return true;
2849
2850 #ifdef HAVE_SYSV_COMPAT
2851         if (s->is_sysv)
2852                 return true;
2853 #endif
2854
2855         return false;
2856 }
2857
2858 _pure_ static bool service_check_snapshot(Unit *u) {
2859         Service *s = SERVICE(u);
2860
2861         assert(s);
2862
2863         return !s->got_socket_fd;
2864 }
2865
2866 static int service_retry_pid_file(Service *s) {
2867         int r;
2868
2869         assert(s->pid_file);
2870         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2871
2872         r = service_load_pid_file(s, false);
2873         if (r < 0)
2874                 return r;
2875
2876         service_unwatch_pid_file(s);
2877
2878         service_enter_running(s, SERVICE_SUCCESS);
2879         return 0;
2880 }
2881
2882 static int service_watch_pid_file(Service *s) {
2883         int r;
2884
2885         log_debug_unit(UNIT(s)->id,
2886                        "Setting watch for %s's PID file %s",
2887                        UNIT(s)->id, s->pid_file_pathspec->path);
2888         r = path_spec_watch(s->pid_file_pathspec, UNIT(s));
2889         if (r < 0)
2890                 goto fail;
2891
2892         /* the pidfile might have appeared just before we set the watch */
2893         log_debug_unit(UNIT(s)->id,
2894                        "Trying to read %s's PID file %s in case it changed",
2895                        UNIT(s)->id, s->pid_file_pathspec->path);
2896         service_retry_pid_file(s);
2897
2898         return 0;
2899 fail:
2900         log_error_unit(UNIT(s)->id,
2901                        "Failed to set a watch for %s's PID file %s: %s",
2902                        UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2903         service_unwatch_pid_file(s);
2904         return r;
2905 }
2906
2907 static int service_demand_pid_file(Service *s) {
2908         PathSpec *ps;
2909
2910         assert(s->pid_file);
2911         assert(!s->pid_file_pathspec);
2912
2913         ps = new0(PathSpec, 1);
2914         if (!ps)
2915                 return -ENOMEM;
2916
2917         ps->path = strdup(s->pid_file);
2918         if (!ps->path) {
2919                 free(ps);
2920                 return -ENOMEM;
2921         }
2922
2923         path_kill_slashes(ps->path);
2924
2925         /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2926          * keep their PID file open all the time. */
2927         ps->type = PATH_MODIFIED;
2928         ps->inotify_fd = -1;
2929
2930         s->pid_file_pathspec = ps;
2931
2932         return service_watch_pid_file(s);
2933 }
2934
2935 static void service_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
2936         Service *s = SERVICE(u);
2937
2938         assert(s);
2939         assert(fd >= 0);
2940         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2941         assert(s->pid_file_pathspec);
2942         assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2943
2944         log_debug_unit(u->id, "inotify event for %s", u->id);
2945
2946         if (path_spec_fd_event(s->pid_file_pathspec, events) < 0)
2947                 goto fail;
2948
2949         if (service_retry_pid_file(s) == 0)
2950                 return;
2951
2952         if (service_watch_pid_file(s) < 0)
2953                 goto fail;
2954
2955         return;
2956 fail:
2957         service_unwatch_pid_file(s);
2958         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2959 }
2960
2961 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2962         Service *s = SERVICE(u);
2963         ServiceResult f;
2964
2965         assert(s);
2966         assert(pid >= 0);
2967
2968         if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2969                                      is_clean_exit_lsb(code, status, &s->success_status))
2970                 f = SERVICE_SUCCESS;
2971         else if (code == CLD_EXITED)
2972                 f = SERVICE_FAILURE_EXIT_CODE;
2973         else if (code == CLD_KILLED)
2974                 f = SERVICE_FAILURE_SIGNAL;
2975         else if (code == CLD_DUMPED)
2976                 f = SERVICE_FAILURE_CORE_DUMP;
2977         else
2978                 assert_not_reached("Unknown code");
2979
2980         if (s->main_pid == pid) {
2981                 /* Forking services may occasionally move to a new PID.
2982                  * As long as they update the PID file before exiting the old
2983                  * PID, they're fine. */
2984                 if (service_load_pid_file(s, false) == 0)
2985                         return;
2986
2987                 s->main_pid = 0;
2988                 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2989
2990                 if (s->main_command) {
2991                         /* If this is not a forking service than the
2992                          * main process got started and hence we copy
2993                          * the exit status so that it is recorded both
2994                          * as main and as control process exit
2995                          * status */
2996
2997                         s->main_command->exec_status = s->main_exec_status;
2998
2999                         if (s->main_command->ignore)
3000                                 f = SERVICE_SUCCESS;
3001                 } else if (s->exec_command[SERVICE_EXEC_START]) {
3002
3003                         /* If this is a forked process, then we should
3004                          * ignore the return value if this was
3005                          * configured for the starter process */
3006
3007                         if (s->exec_command[SERVICE_EXEC_START]->ignore)
3008                                 f = SERVICE_SUCCESS;
3009                 }
3010
3011                 log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
3012                            u->id,
3013                            "MESSAGE=%s: main process exited, code=%s, status=%i/%s",
3014                                   u->id, sigchld_code_to_string(code), status,
3015                                   strna(code == CLD_EXITED
3016                                         ? exit_status_to_string(status, EXIT_STATUS_FULL)
3017                                         : signal_to_string(status)),
3018                            "EXIT_CODE=%s", sigchld_code_to_string(code),
3019                            "EXIT_STATUS=%i", status,
3020                            NULL);
3021
3022                 if (f != SERVICE_SUCCESS)
3023                         s->result = f;
3024
3025                 if (s->main_command &&
3026                     s->main_command->command_next &&
3027                     f == SERVICE_SUCCESS) {
3028
3029                         /* There is another command to *
3030                          * execute, so let's do that. */
3031
3032                         log_debug_unit(u->id,
3033                                        "%s running next main command for state %s",
3034                                        u->id, service_state_to_string(s->state));
3035                         service_run_next_main(s);
3036
3037                 } else {
3038
3039                         /* The service exited, so the service is officially
3040                          * gone. */
3041                         s->main_command = NULL;
3042
3043                         switch (s->state) {
3044
3045                         case SERVICE_START_POST:
3046                         case SERVICE_RELOAD:
3047                         case SERVICE_STOP:
3048                                 /* Need to wait until the operation is
3049                                  * done */
3050                                 break;
3051
3052                         case SERVICE_START:
3053                                 if (s->type == SERVICE_ONESHOT) {
3054                                         /* This was our main goal, so let's go on */
3055                                         if (f == SERVICE_SUCCESS)
3056                                                 service_enter_start_post(s);
3057                                         else
3058                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3059                                         break;
3060                                 }
3061
3062                                 /* Fall through */
3063
3064                         case SERVICE_RUNNING:
3065                                 service_enter_running(s, f);
3066                                 break;
3067
3068                         case SERVICE_STOP_SIGTERM:
3069                         case SERVICE_STOP_SIGKILL:
3070
3071                                 if (!control_pid_good(s))
3072                                         service_enter_stop_post(s, f);
3073
3074                                 /* If there is still a control process, wait for that first */
3075                                 break;
3076
3077                         default:
3078                                 assert_not_reached("Uh, main process died at wrong time.");
3079                         }
3080                 }
3081
3082         } else if (s->control_pid == pid) {
3083                 s->control_pid = 0;
3084
3085                 if (s->control_command) {
3086                         exec_status_exit(&s->control_command->exec_status,
3087                                          &s->exec_context, pid, code, status);
3088
3089                         if (s->control_command->ignore)
3090                                 f = SERVICE_SUCCESS;
3091                 }
3092
3093                 log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
3094                               "%s: control process exited, code=%s status=%i",
3095                               u->id, sigchld_code_to_string(code), status);
3096
3097                 if (f != SERVICE_SUCCESS)
3098                         s->result = f;
3099
3100                 /* Immediately get rid of the cgroup, so that the
3101                  * kernel doesn't delay the cgroup empty messages for
3102                  * the service cgroup any longer than necessary */
3103                 service_kill_control_processes(s);
3104
3105                 if (s->control_command &&
3106                     s->control_command->command_next &&
3107                     f == SERVICE_SUCCESS) {
3108
3109                         /* There is another command to *
3110                          * execute, so let's do that. */
3111
3112                         log_debug_unit(u->id,
3113                                        "%s running next control command for state %s",
3114                                        u->id, service_state_to_string(s->state));
3115                         service_run_next_control(s);
3116
3117                 } else {
3118                         /* No further commands for this step, so let's
3119                          * figure out what to do next */
3120
3121                         s->control_command = NULL;
3122                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3123
3124                         log_debug_unit(u->id,
3125                                        "%s got final SIGCHLD for state %s",
3126                                        u->id, service_state_to_string(s->state));
3127
3128                         switch (s->state) {
3129
3130                         case SERVICE_START_PRE:
3131                                 if (f == SERVICE_SUCCESS)
3132                                         service_enter_start(s);
3133                                 else
3134                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3135                                 break;
3136
3137                         case SERVICE_START:
3138                                 if (s->type != SERVICE_FORKING)
3139                                         /* Maybe spurious event due to a reload that changed the type? */
3140                                         break;
3141
3142                                 if (f != SERVICE_SUCCESS) {
3143                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3144                                         break;
3145                                 }
3146
3147                                 if (s->pid_file) {
3148                                         bool has_start_post;
3149                                         int r;
3150
3151                                         /* Let's try to load the pid file here if we can.
3152                                          * The PID file might actually be created by a START_POST
3153                                          * script. In that case don't worry if the loading fails. */
3154
3155                                         has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3156                                         r = service_load_pid_file(s, !has_start_post);
3157                                         if (!has_start_post && r < 0) {
3158                                                 r = service_demand_pid_file(s);
3159                                                 if (r < 0 || !cgroup_good(s))
3160                                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3161                                                 break;
3162                                         }
3163                                 } else
3164                                         service_search_main_pid(s);
3165
3166                                 service_enter_start_post(s);
3167                                 break;
3168
3169                         case SERVICE_START_POST:
3170                                 if (f != SERVICE_SUCCESS) {
3171                                         service_enter_stop(s, f);
3172                                         break;
3173                                 }
3174
3175                                 if (s->pid_file) {
3176                                         int r;
3177
3178                                         r = service_load_pid_file(s, true);
3179                                         if (r < 0) {
3180                                                 r = service_demand_pid_file(s);
3181                                                 if (r < 0 || !cgroup_good(s))
3182                                                         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3183                                                 break;
3184                                         }
3185                                 } else
3186                                         service_search_main_pid(s);
3187
3188                                 service_enter_running(s, SERVICE_SUCCESS);
3189                                 break;
3190
3191                         case SERVICE_RELOAD:
3192                                 if (f == SERVICE_SUCCESS) {
3193                                         service_load_pid_file(s, true);
3194                                         service_search_main_pid(s);
3195                                 }
3196
3197                                 s->reload_result = f;
3198                                 service_enter_running(s, SERVICE_SUCCESS);
3199                                 break;
3200
3201                         case SERVICE_STOP:
3202                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3203                                 break;
3204
3205                         case SERVICE_STOP_SIGTERM:
3206                         case SERVICE_STOP_SIGKILL:
3207                                 if (main_pid_good(s) <= 0)
3208                                         service_enter_stop_post(s, f);
3209
3210                                 /* If there is still a service
3211                                  * process around, wait until
3212                                  * that one quit, too */
3213                                 break;
3214
3215                         case SERVICE_STOP_POST:
3216                         case SERVICE_FINAL_SIGTERM:
3217                         case SERVICE_FINAL_SIGKILL:
3218                                 service_enter_dead(s, f, true);
3219                                 break;
3220
3221                         default:
3222                                 assert_not_reached("Uh, control process died at wrong time.");
3223                         }
3224                 }
3225         }
3226
3227         /* Notify clients about changed exit status */
3228         unit_add_to_dbus_queue(u);
3229 }
3230
3231 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
3232         Service *s = SERVICE(u);
3233
3234         assert(s);
3235         assert(elapsed == 1);
3236
3237         if (w == &s->watchdog_watch) {
3238                 service_handle_watchdog(s);
3239                 return;
3240         }
3241
3242         assert(w == &s->timer_watch);
3243
3244         switch (s->state) {
3245
3246         case SERVICE_START_PRE:
3247         case SERVICE_START:
3248                 log_warning_unit(u->id,
3249                                  "%s operation timed out. Terminating.", u->id);
3250                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3251                 break;
3252
3253         case SERVICE_START_POST:
3254                 log_warning_unit(u->id,
3255                                  "%s operation timed out. Stopping.", u->id);
3256                 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3257                 break;
3258
3259         case SERVICE_RELOAD:
3260                 log_warning_unit(u->id,
3261                                  "%s operation timed out. Stopping.", u->id);
3262                 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3263                 service_enter_running(s, SERVICE_SUCCESS);
3264                 break;
3265
3266         case SERVICE_STOP:
3267                 log_warning_unit(u->id,
3268                                  "%s stopping timed out. Terminating.", u->id);
3269                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3270                 break;
3271
3272         case SERVICE_STOP_SIGTERM:
3273                 if (s->kill_context.send_sigkill) {
3274                         log_warning_unit(u->id,
3275                                          "%s stopping timed out. Killing.", u->id);
3276                         service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3277                 } else {
3278                         log_warning_unit(u->id,
3279                                          "%s stopping timed out. Skipping SIGKILL.", u->id);
3280                         service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3281                 }
3282
3283                 break;
3284
3285         case SERVICE_STOP_SIGKILL:
3286                 /* Uh, we sent a SIGKILL and it is still not gone?
3287                  * Must be something we cannot kill, so let's just be
3288                  * weirded out and continue */
3289
3290                 log_warning_unit(u->id,
3291                                  "%s still around after SIGKILL. Ignoring.", u->id);
3292                 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3293                 break;
3294
3295         case SERVICE_STOP_POST:
3296                 log_warning_unit(u->id,
3297                                  "%s stopping timed out (2). Terminating.", u->id);
3298                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3299                 break;
3300
3301         case SERVICE_FINAL_SIGTERM:
3302                 if (s->kill_context.send_sigkill) {
3303                         log_warning_unit(u->id,
3304                                          "%s stopping timed out (2). Killing.", u->id);
3305                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3306                 } else {
3307                         log_warning_unit(u->id,
3308                                          "%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.",
3309                                          u->id);
3310                         service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3311                 }
3312
3313                 break;
3314
3315         case SERVICE_FINAL_SIGKILL:
3316                 log_warning_unit(u->id,
3317                                  "%s still around after SIGKILL (2). Entering failed mode.", u->id);
3318                 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3319                 break;
3320
3321         case SERVICE_AUTO_RESTART:
3322                 log_info_unit(u->id,
3323                               "%s holdoff time over, scheduling restart.", u->id);
3324                 service_enter_restart(s);
3325                 break;
3326
3327         default:
3328                 assert_not_reached("Timeout at wrong time.");
3329         }
3330 }
3331
3332 static void service_notify_cgroup_empty_event(Unit *u) {
3333         Service *s = SERVICE(u);
3334
3335         assert(u);
3336
3337         log_debug_unit(u->id, "%s: cgroup is empty", u->id);
3338
3339         switch (s->state) {
3340
3341                 /* Waiting for SIGCHLD is usually more interesting,
3342                  * because it includes return codes/signals. Which is
3343                  * why we ignore the cgroup events for most cases,
3344                  * except when we don't know pid which to expect the
3345                  * SIGCHLD for. */
3346
3347         case SERVICE_START:
3348         case SERVICE_START_POST:
3349                 /* If we were hoping for the daemon to write its PID file,
3350                  * we can give up now. */
3351                 if (s->pid_file_pathspec) {
3352                         log_warning_unit(u->id,
3353                                          "%s never wrote its PID file. Failing.", UNIT(s)->id);
3354                         service_unwatch_pid_file(s);
3355                         if (s->state == SERVICE_START)
3356                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3357                         else
3358                                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3359                 }
3360                 break;
3361
3362         case SERVICE_RUNNING:
3363                 /* service_enter_running() will figure out what to do */
3364                 service_enter_running(s, SERVICE_SUCCESS);
3365                 break;
3366
3367         case SERVICE_STOP_SIGTERM:
3368         case SERVICE_STOP_SIGKILL:
3369
3370                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3371                         service_enter_stop_post(s, SERVICE_SUCCESS);
3372
3373                 break;
3374
3375         case SERVICE_FINAL_SIGTERM:
3376         case SERVICE_FINAL_SIGKILL:
3377                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3378                         service_enter_dead(s, SERVICE_SUCCESS, true);
3379
3380                 break;
3381
3382         default:
3383                 ;
3384         }
3385 }
3386
3387 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3388         Service *s = SERVICE(u);
3389         const char *e;
3390
3391         assert(u);
3392
3393         if (s->notify_access == NOTIFY_NONE) {
3394                 log_warning_unit(u->id,
3395                                  "%s: Got notification message from PID %lu, but reception is disabled.",
3396                                  u->id, (unsigned long) pid);
3397                 return;
3398         }
3399
3400         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3401                 log_warning_unit(u->id,
3402                                  "%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3403                                  u->id, (unsigned long) pid, (unsigned long) s->main_pid);
3404                 return;
3405         }
3406
3407         log_debug_unit(u->id,
3408                        "%s: Got message", u->id);
3409
3410         /* Interpret MAINPID= */
3411         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3412             (s->state == SERVICE_START ||
3413              s->state == SERVICE_START_POST ||
3414              s->state == SERVICE_RUNNING ||
3415              s->state == SERVICE_RELOAD)) {
3416
3417                 if (parse_pid(e + 8, &pid) < 0)
3418                         log_warning_unit(u->id,
3419                                          "Failed to parse notification message %s", e);
3420                 else {
3421                         log_debug_unit(u->id,
3422                                        "%s: got %s", u->id, e);
3423                         service_set_main_pid(s, pid);
3424                 }
3425         }
3426
3427         /* Interpret READY= */
3428         if (s->type == SERVICE_NOTIFY &&
3429             s->state == SERVICE_START &&
3430             strv_find(tags, "READY=1")) {
3431                 log_debug_unit(u->id,
3432                                "%s: got READY=1", u->id);
3433
3434                 service_enter_start_post(s);
3435         }
3436
3437         /* Interpret STATUS= */
3438         e = strv_find_prefix(tags, "STATUS=");
3439         if (e) {
3440                 char *t;
3441
3442                 if (e[7]) {
3443
3444                         if (!utf8_is_valid(e+7)) {
3445                                 log_warning_unit(u->id,
3446                                                  "Status message in notification is not UTF-8 clean.");
3447                                 return;
3448                         }
3449
3450                         t = strdup(e+7);
3451                         if (!t) {
3452                                 log_error_unit(u->id,
3453                                                "Failed to allocate string.");
3454                                 return;
3455                         }
3456
3457                         log_debug_unit(u->id,
3458                                        "%s: got %s", u->id, e);
3459
3460                         free(s->status_text);
3461                         s->status_text = t;
3462                 } else {
3463                         free(s->status_text);
3464                         s->status_text = NULL;
3465                 }
3466
3467         }
3468         if (strv_find(tags, "WATCHDOG=1")) {
3469                 log_debug_unit(u->id,
3470                                "%s: got WATCHDOG=1", u->id);
3471                 if (dual_timestamp_is_set(&s->watchdog_timestamp))
3472                         service_reset_watchdog(s);
3473         }
3474
3475         /* Notify clients about changed status or main pid */
3476         unit_add_to_dbus_queue(u);
3477 }
3478
3479 #ifdef HAVE_SYSV_COMPAT
3480
3481 static int service_enumerate(Manager *m) {
3482         char **p;
3483         unsigned i;
3484         _cleanup_closedir_ DIR *d = NULL;
3485         _cleanup_free_ char *path = NULL, *fpath = NULL, *name = NULL;
3486         Set *runlevel_services[ELEMENTSOF(rcnd_table)] = {};
3487         _cleanup_set_free_ Set *shutdown_services = NULL;
3488         Unit *service;
3489         Iterator j;
3490         int r;
3491
3492         assert(m);
3493
3494         if (m->running_as != SYSTEMD_SYSTEM)
3495                 return 0;
3496
3497         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3498                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3499                         struct dirent *de;
3500
3501                         free(path);
3502                         path = strjoin(*p, "/", rcnd_table[i].path, NULL);
3503                         if (!path) {
3504                                 r = -ENOMEM;
3505                                 goto finish;
3506                         }
3507
3508                         if (d)
3509                                 closedir(d);
3510
3511                         d = opendir(path);
3512                         if (!d) {
3513                                 if (errno != ENOENT)
3514                                         log_warning("opendir(%s) failed: %s", path, strerror(errno));
3515
3516                                 continue;
3517                         }
3518
3519                         while ((de = readdir(d))) {
3520                                 int a, b;
3521
3522                                 if (ignore_file(de->d_name))
3523                                         continue;
3524
3525                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3526                                         continue;
3527
3528                                 if (strlen(de->d_name) < 4)
3529                                         continue;
3530
3531                                 a = undecchar(de->d_name[1]);
3532                                 b = undecchar(de->d_name[2]);
3533
3534                                 if (a < 0 || b < 0)
3535                                         continue;
3536
3537                                 free(fpath);
3538                                 fpath = strjoin(path, "/", de->d_name, NULL);
3539                                 if (!fpath) {
3540                                         r = -ENOMEM;
3541                                         goto finish;
3542                                 }
3543
3544                                 if (access(fpath, X_OK) < 0) {
3545
3546                                         if (errno != ENOENT)
3547                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3548
3549                                         continue;
3550                                 }
3551
3552                                 free(name);
3553                                 name = sysv_translate_name(de->d_name + 3);
3554                                 if (!name) {
3555                                         r = log_oom();
3556                                         goto finish;
3557                                 }
3558
3559                                 r = manager_load_unit_prepare(m, name, NULL, NULL, &service);
3560                                 if (r < 0) {
3561                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3562                                         continue;
3563                                 }
3564
3565                                 if (de->d_name[0] == 'S')  {
3566
3567                                         if (rcnd_table[i].type == RUNLEVEL_UP) {
3568                                                 SERVICE(service)->sysv_start_priority_from_rcnd =
3569                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3570
3571                                                 SERVICE(service)->sysv_enabled = true;
3572                                         }
3573
3574                                         r = set_ensure_allocated(&runlevel_services[i],
3575                                                                  trivial_hash_func, trivial_compare_func);
3576                                         if (r < 0)
3577                                                 goto finish;
3578
3579                                         r = set_put(runlevel_services[i], service);
3580                                         if (r < 0)
3581                                                 goto finish;
3582
3583                                 } else if (de->d_name[0] == 'K' &&
3584                                            (rcnd_table[i].type == RUNLEVEL_DOWN)) {
3585
3586                                         r = set_ensure_allocated(&shutdown_services,
3587                                                                  trivial_hash_func, trivial_compare_func);
3588                                         if (r < 0)
3589                                                 goto finish;
3590
3591                                         r = set_put(shutdown_services, service);
3592                                         if (r < 0)
3593                                                 goto finish;
3594                                 }
3595                         }
3596                 }
3597
3598         /* Now we loaded all stubs and are aware of the lowest
3599         start-up priority for all services, not let's actually load
3600         the services, this will also tell us which services are
3601         actually native now */
3602         manager_dispatch_load_queue(m);
3603
3604         /* If this is a native service, rely on native ways to pull in
3605          * a service, don't pull it in via sysv rcN.d links. */
3606         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3607                 SET_FOREACH(service, runlevel_services[i], j) {
3608                         service = unit_follow_merge(service);
3609
3610                         if (service->fragment_path)
3611                                 continue;
3612
3613                         r = unit_add_two_dependencies_by_name_inverse(
3614                                 service, UNIT_AFTER, UNIT_WANTS,
3615                                 rcnd_table[i].target, NULL, true);
3616                         if (r < 0)
3617                                 goto finish;
3618                 }
3619
3620         /* We honour K links only for halt/reboot. For the normal
3621          * runlevels we assume the stop jobs will be implicitly added
3622          * by the core logic. Also, we don't really distinguish here
3623          * between the runlevels 0 and 6 and just add them to the
3624          * special shutdown target. */
3625         SET_FOREACH(service, shutdown_services, j) {
3626                 service = unit_follow_merge(service);
3627
3628                 if (service->fragment_path)
3629                         continue;
3630
3631                 r = unit_add_two_dependencies_by_name(
3632                         service, UNIT_BEFORE, UNIT_CONFLICTS,
3633                         SPECIAL_SHUTDOWN_TARGET, NULL, true);
3634                 if (r < 0)
3635                         goto finish;
3636         }
3637
3638         r = 0;
3639
3640 finish:
3641
3642         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3643                 set_free(runlevel_services[i]);
3644
3645         return r;
3646 }
3647 #endif
3648
3649 static void service_bus_name_owner_change(
3650                 Unit *u,
3651                 const char *name,
3652                 const char *old_owner,
3653                 const char *new_owner) {
3654
3655         Service *s = SERVICE(u);
3656
3657         assert(s);
3658         assert(name);
3659
3660         assert(streq(s->bus_name, name));
3661         assert(old_owner || new_owner);
3662
3663         if (old_owner && new_owner)
3664                 log_debug_unit(u->id,
3665                                "%s's D-Bus name %s changed owner from %s to %s",
3666                                u->id, name, old_owner, new_owner);
3667         else if (old_owner)
3668                 log_debug_unit(u->id,
3669                                "%s's D-Bus name %s no longer registered by %s",
3670                                u->id, name, old_owner);
3671         else
3672                 log_debug_unit(u->id,
3673                                "%s's D-Bus name %s now registered by %s",
3674                                u->id, name, new_owner);
3675
3676         s->bus_name_good = !!new_owner;
3677
3678         if (s->type == SERVICE_DBUS) {
3679
3680                 /* service_enter_running() will figure out what to
3681                  * do */
3682                 if (s->state == SERVICE_RUNNING)
3683                         service_enter_running(s, SERVICE_SUCCESS);
3684                 else if (s->state == SERVICE_START && new_owner)
3685                         service_enter_start_post(s);
3686
3687         } else if (new_owner &&
3688                    s->main_pid <= 0 &&
3689                    (s->state == SERVICE_START ||
3690                     s->state == SERVICE_START_POST ||
3691                     s->state == SERVICE_RUNNING ||
3692                     s->state == SERVICE_RELOAD)) {
3693
3694                 /* Try to acquire PID from bus service */
3695                 log_debug_unit(u->id,
3696                                "Trying to acquire PID from D-Bus name...");
3697
3698                 bus_query_pid(u->manager, name);
3699         }
3700 }
3701
3702 static void service_bus_query_pid_done(
3703                 Unit *u,
3704                 const char *name,
3705                 pid_t pid) {
3706
3707         Service *s = SERVICE(u);
3708
3709         assert(s);
3710         assert(name);
3711
3712         log_debug_unit(u->id,
3713                        "%s's D-Bus name %s is now owned by process %u",
3714                        u->id, name, (unsigned) pid);
3715
3716         if (s->main_pid <= 0 &&
3717             (s->state == SERVICE_START ||
3718              s->state == SERVICE_START_POST ||
3719              s->state == SERVICE_RUNNING ||
3720              s->state == SERVICE_RELOAD))
3721                 service_set_main_pid(s, pid);
3722 }
3723
3724 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3725
3726         assert(s);
3727         assert(fd >= 0);
3728
3729         /* This is called by the socket code when instantiating a new
3730          * service for a stream socket and the socket needs to be
3731          * configured. */
3732
3733         if (UNIT(s)->load_state != UNIT_LOADED)
3734                 return -EINVAL;
3735
3736         if (s->socket_fd >= 0)
3737                 return -EBUSY;
3738
3739         if (s->state != SERVICE_DEAD)
3740                 return -EAGAIN;
3741
3742         s->socket_fd = fd;
3743         s->got_socket_fd = true;
3744
3745         unit_ref_set(&s->accept_socket, UNIT(sock));
3746
3747         return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3748 }
3749
3750 static void service_reset_failed(Unit *u) {
3751         Service *s = SERVICE(u);
3752
3753         assert(s);
3754
3755         if (s->state == SERVICE_FAILED)
3756                 service_set_state(s, SERVICE_DEAD);
3757
3758         s->result = SERVICE_SUCCESS;
3759         s->reload_result = SERVICE_SUCCESS;
3760
3761         RATELIMIT_RESET(s->start_limit);
3762 }
3763
3764 static int service_kill(Unit *u, KillWho who, int signo, DBusError *error) {
3765         Service *s = SERVICE(u);
3766
3767         return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3768 }
3769
3770 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3771         [SERVICE_DEAD] = "dead",
3772         [SERVICE_START_PRE] = "start-pre",
3773         [SERVICE_START] = "start",
3774         [SERVICE_START_POST] = "start-post",
3775         [SERVICE_RUNNING] = "running",
3776         [SERVICE_EXITED] = "exited",
3777         [SERVICE_RELOAD] = "reload",
3778         [SERVICE_STOP] = "stop",
3779         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3780         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3781         [SERVICE_STOP_POST] = "stop-post",
3782         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3783         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3784         [SERVICE_FAILED] = "failed",
3785         [SERVICE_AUTO_RESTART] = "auto-restart",
3786 };
3787
3788 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3789
3790 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3791         [SERVICE_RESTART_NO] = "no",
3792         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3793         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3794         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3795         [SERVICE_RESTART_ALWAYS] = "always"
3796 };
3797
3798 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3799
3800 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3801         [SERVICE_SIMPLE] = "simple",
3802         [SERVICE_FORKING] = "forking",
3803         [SERVICE_ONESHOT] = "oneshot",
3804         [SERVICE_DBUS] = "dbus",
3805         [SERVICE_NOTIFY] = "notify",
3806         [SERVICE_IDLE] = "idle"
3807 };
3808
3809 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3810
3811 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3812         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3813         [SERVICE_EXEC_START] = "ExecStart",
3814         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3815         [SERVICE_EXEC_RELOAD] = "ExecReload",
3816         [SERVICE_EXEC_STOP] = "ExecStop",
3817         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3818 };
3819
3820 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3821
3822 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3823         [NOTIFY_NONE] = "none",
3824         [NOTIFY_MAIN] = "main",
3825         [NOTIFY_ALL] = "all"
3826 };
3827
3828 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3829
3830 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3831         [SERVICE_SUCCESS] = "success",
3832         [SERVICE_FAILURE_RESOURCES] = "resources",
3833         [SERVICE_FAILURE_TIMEOUT] = "timeout",
3834         [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3835         [SERVICE_FAILURE_SIGNAL] = "signal",
3836         [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3837         [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3838         [SERVICE_FAILURE_START_LIMIT] = "start-limit"
3839 };
3840
3841 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3842
3843 static const char* const start_limit_action_table[_SERVICE_START_LIMIT_MAX] = {
3844         [SERVICE_START_LIMIT_NONE] = "none",
3845         [SERVICE_START_LIMIT_REBOOT] = "reboot",
3846         [SERVICE_START_LIMIT_REBOOT_FORCE] = "reboot-force",
3847         [SERVICE_START_LIMIT_REBOOT_IMMEDIATE] = "reboot-immediate"
3848 };
3849 DEFINE_STRING_TABLE_LOOKUP(start_limit_action, StartLimitAction);
3850
3851 const UnitVTable service_vtable = {
3852         .object_size = sizeof(Service),
3853
3854         .sections =
3855                 "Unit\0"
3856                 "Service\0"
3857                 "Install\0",
3858
3859         .private_section = "Service",
3860         .exec_context_offset = offsetof(Service, exec_context),
3861         .cgroup_context_offset = offsetof(Service, cgroup_context),
3862
3863         .init = service_init,
3864         .done = service_done,
3865         .load = service_load,
3866
3867         .coldplug = service_coldplug,
3868
3869         .dump = service_dump,
3870
3871         .start = service_start,
3872         .stop = service_stop,
3873         .reload = service_reload,
3874
3875         .can_reload = service_can_reload,
3876
3877         .kill = service_kill,
3878
3879         .serialize = service_serialize,
3880         .deserialize_item = service_deserialize_item,
3881
3882         .active_state = service_active_state,
3883         .sub_state_to_string = service_sub_state_to_string,
3884
3885         .check_gc = service_check_gc,
3886         .check_snapshot = service_check_snapshot,
3887
3888         .sigchld_event = service_sigchld_event,
3889         .timer_event = service_timer_event,
3890         .fd_event = service_fd_event,
3891
3892         .reset_failed = service_reset_failed,
3893
3894         .notify_cgroup_empty = service_notify_cgroup_empty_event,
3895         .notify_message = service_notify_message,
3896
3897         .bus_name_owner_change = service_bus_name_owner_change,
3898         .bus_query_pid_done = service_bus_query_pid_done,
3899
3900         .bus_interface = "org.freedesktop.systemd1.Service",
3901         .bus_message_handler = bus_service_message_handler,
3902         .bus_invalidating_properties =  bus_service_invalidating_properties,
3903         .bus_set_property = bus_service_set_property,
3904         .bus_commit_properties = bus_service_commit_properties,
3905
3906         .can_transient = true,
3907
3908 #ifdef HAVE_SYSV_COMPAT
3909         .enumerate = service_enumerate,
3910 #endif
3911         .status_message_formats = {
3912                 .starting_stopping = {
3913                         [0] = "Starting %s...",
3914                         [1] = "Stopping %s...",
3915                 },
3916                 .finished_start_job = {
3917                         [JOB_DONE]       = "Started %s.",
3918                         [JOB_FAILED]     = "Failed to start %s.",
3919                         [JOB_DEPENDENCY] = "Dependency failed for %s.",
3920                         [JOB_TIMEOUT]    = "Timed out starting %s.",
3921                 },
3922                 .finished_stop_job = {
3923                         [JOB_DONE]       = "Stopped %s.",
3924                         [JOB_FAILED]     = "Stopped (with error) %s.",
3925                         [JOB_TIMEOUT]    = "Timed out stopping %s.",
3926                 },
3927         },
3928 };