src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35 #include "special.h"
  36 #include "bus-errors.h"
  37
  38 #define COMMENTS "#;\n"
  39 #define NEWLINES "\n\r"
  40
  41 #ifdef HAVE_SYSV_COMPAT
  42
  43 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
  44
  45 typedef enum RunlevelType {
  46         RUNLEVEL_UP,
  47         RUNLEVEL_DOWN,
  48         RUNLEVEL_SYSINIT
  49 } RunlevelType;
  50
  51 static const struct {
  52         const char *path;
  53         const char *target;
  54         const RunlevelType type;
  55 } rcnd_table[] = {
  56         /* Standard SysV runlevels for start-up */
  57         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  58         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  59         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  60         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  61         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  62
  63 #ifdef TARGET_SUSE
  64         /* SUSE style boot.d */
  65         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  66 #endif
  67
  68 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_FRUGALWARE)
  69         /* Debian style rcS.d */
  70         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  71 #endif
  72
  73         /* Standard SysV runlevels for shutdown */
  74         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  75         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  76
  77         /* Note that the order here matters, as we read the
  78            directories in this order, and we want to make sure that
  79            sysv_start_priority is known when we first load the
  80            unit. And that value we only know from S links. Hence
  81            UP/SYSINIT must be read before DOWN */
  82 };
  83
  84 #define RUNLEVELS_UP "12345"
  85 /* #define RUNLEVELS_DOWN "06" */
  86 /* #define RUNLEVELS_BOOT "bBsS" */
  87 #endif
  88
  89 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  90         [SERVICE_DEAD] = UNIT_INACTIVE,
  91         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  92         [SERVICE_START] = UNIT_ACTIVATING,
  93         [SERVICE_START_POST] = UNIT_ACTIVATING,
  94         [SERVICE_RUNNING] = UNIT_ACTIVE,
  95         [SERVICE_EXITED] = UNIT_ACTIVE,
  96         [SERVICE_RELOAD] = UNIT_RELOADING,
  97         [SERVICE_STOP] = UNIT_DEACTIVATING,
  98         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 101         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 103         [SERVICE_FAILED] = UNIT_FAILED,
 104         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 105 };
 106
 107 static void service_init(Unit *u) {
 108         Service *s = SERVICE(u);
 109
 110         assert(u);
 111         assert(u->meta.load_state == UNIT_STUB);
 112
 113         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 114         s->restart_usec = DEFAULT_RESTART_USEC;
 115         s->timer_watch.type = WATCH_INVALID;
 116 #ifdef HAVE_SYSV_COMPAT
 117         s->sysv_start_priority = -1;
 118 #endif
 119         s->socket_fd = -1;
 120
 121         exec_context_init(&s->exec_context);
 122
 123         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 124
 125         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 126 }
 127
 128 static void service_unwatch_control_pid(Service *s) {
 129         assert(s);
 130
 131         if (s->control_pid <= 0)
 132                 return;
 133
 134         unit_unwatch_pid(UNIT(s), s->control_pid);
 135         s->control_pid = 0;
 136 }
 137
 138 static void service_unwatch_main_pid(Service *s) {
 139         assert(s);
 140
 141         if (s->main_pid <= 0)
 142                 return;
 143
 144         unit_unwatch_pid(UNIT(s), s->main_pid);
 145         s->main_pid = 0;
 146 }
 147
 148 static int service_set_main_pid(Service *s, pid_t pid) {
 149         pid_t ppid;
 150
 151         assert(s);
 152
 153         if (pid <= 1)
 154                 return -EINVAL;
 155
 156         if (pid == getpid())
 157                 return -EINVAL;
 158
 159         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 160                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 161                             s->meta.id, (unsigned long) pid);
 162
 163         s->main_pid = pid;
 164         s->main_pid_known = true;
 165
 166         exec_status_start(&s->main_exec_status, pid);
 167
 168         return 0;
 169 }
 170
 171 static void service_close_socket_fd(Service *s) {
 172         assert(s);
 173
 174         if (s->socket_fd < 0)
 175                 return;
 176
 177         close_nointr_nofail(s->socket_fd);
 178         s->socket_fd = -1;
 179 }
 180
 181 static void service_connection_unref(Service *s) {
 182         assert(s);
 183
 184         if (!s->accept_socket)
 185                 return;
 186
 187         socket_connection_unref(s->accept_socket);
 188         s->accept_socket = NULL;
 189 }
 190
 191 static void service_done(Unit *u) {
 192         Service *s = SERVICE(u);
 193
 194         assert(s);
 195
 196         free(s->pid_file);
 197         s->pid_file = NULL;
 198
 199 #ifdef HAVE_SYSV_COMPAT
 200         free(s->sysv_path);
 201         s->sysv_path = NULL;
 202
 203         free(s->sysv_runlevels);
 204         s->sysv_runlevels = NULL;
 205 #endif
 206
 207         free(s->status_text);
 208         s->status_text = NULL;
 209
 210         exec_context_done(&s->exec_context);
 211         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 212         s->control_command = NULL;
 213
 214         /* This will leak a process, but at least no memory or any of
 215          * our resources */
 216         service_unwatch_main_pid(s);
 217         service_unwatch_control_pid(s);
 218
 219         if (s->bus_name)  {
 220                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 221                 free(s->bus_name);
 222                 s->bus_name = NULL;
 223         }
 224
 225         service_close_socket_fd(s);
 226         service_connection_unref(s);
 227
 228         set_free(s->configured_sockets);
 229
 230         unit_unwatch_timer(u, &s->timer_watch);
 231 }
 232
 233 #ifdef HAVE_SYSV_COMPAT
 234 static char *sysv_translate_name(const char *name) {
 235         char *r;
 236
 237         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 238                 return NULL;
 239
 240 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 241         if (endswith(name, ".sh"))
 242                 /* Drop Debian-style .sh suffix */
 243                 strcpy(stpcpy(r, name) - 3, ".service");
 244 #endif
 245 #ifdef TARGET_SUSE
 246         if (startswith(name, "boot."))
 247                 /* Drop SuSE-style boot. prefix */
 248                 strcpy(stpcpy(r, name + 5), ".service");
 249 #endif
 250 #ifdef TARGET_FRUGALWARE
 251         if (startswith(name, "rc."))
 252                 /* Drop Frugalware-style rc. prefix */
 253                 strcpy(stpcpy(r, name + 3), ".service");
 254 #endif
 255         else
 256                 /* Normal init scripts */
 257                 strcpy(stpcpy(r, name), ".service");
 258
 259         return r;
 260 }
 261
 262 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 263
 264         /* We silently ignore the $ prefix here. According to the LSB
 265          * spec it simply indicates whether something is a
 266          * standardized name or a distribution-specific one. Since we
 267          * just follow what already exists and do not introduce new
 268          * uses or names we don't care who introduced a new name. */
 269
 270         static const char * const table[] = {
 271                 /* LSB defined facilities */
 272                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 273                 "network",              SPECIAL_NETWORK_TARGET,
 274                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 275                 "portmap",              SPECIAL_RPCBIND_TARGET,
 276                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 277                 "syslog",               SPECIAL_SYSLOG_TARGET,
 278                 "time",                 SPECIAL_RTC_SET_TARGET,
 279
 280                 /* common extensions */
 281                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 282                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 283                 "null",                 NULL,
 284
 285 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 286                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 287 #endif
 288
 289 #ifdef TARGET_FEDORA
 290                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 291                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 292                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 293 #endif
 294
 295 #ifdef TARGET_SUSE
 296                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 297 #endif
 298         };
 299
 300         unsigned i;
 301         char *r;
 302         const char *n;
 303
 304         assert(name);
 305         assert(_r);
 306
 307         n = *name == '$' ? name + 1 : name;
 308
 309         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 310
 311                 if (!streq(table[i], n))
 312                         continue;
 313
 314                 if (!table[i+1])
 315                         return 0;
 316
 317                 if (!(r = strdup(table[i+1])))
 318                         return -ENOMEM;
 319
 320                 goto finish;
 321         }
 322
 323         /* If we don't know this name, fallback heuristics to figure
 324          * out whether something is a target or a service alias. */
 325
 326         if (*name == '$') {
 327                 if (!unit_prefix_is_valid(n))
 328                         return -EINVAL;
 329
 330                 /* Facilities starting with $ are most likely targets */
 331                 r = unit_name_build(n, NULL, ".target");
 332         } else if (filename && streq(name, filename))
 333                 /* Names equalling the file name of the services are redundant */
 334                 return 0;
 335         else
 336                 /* Everything else we assume to be normal service names */
 337                 r = sysv_translate_name(n);
 338
 339         if (!r)
 340                 return -ENOMEM;
 341
 342 finish:
 343
 344         if (_r)
 345                 *_r = r;
 346
 347         return 1;
 348 }
 349
 350 static int sysv_fix_order(Service *s) {
 351         Meta *other;
 352         int r;
 353
 354         assert(s);
 355
 356         if (s->sysv_start_priority < 0)
 357                 return 0;
 358
 359         /* For each pair of services where at least one lacks a LSB
 360          * header, we use the start priority value to order things. */
 361
 362         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 363                 Service *t;
 364                 UnitDependency d;
 365                 bool special_s, special_t;
 366
 367                 t = (Service*) other;
 368
 369                 if (s == t)
 370                         continue;
 371
 372                 if (t->meta.load_state != UNIT_LOADED)
 373                         continue;
 374
 375                 if (t->sysv_start_priority < 0)
 376                         continue;
 377
 378                 /* If both units have modern headers we don't care
 379                  * about the priorities */
 380                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 381                     (t->meta.fragment_path || t->sysv_has_lsb))
 382                         continue;
 383
 384                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 385                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 386
 387                 if (special_t && !special_s)
 388                         d = UNIT_AFTER;
 389                 else if (special_s && !special_t)
 390                         d = UNIT_BEFORE;
 391                 else if (t->sysv_start_priority < s->sysv_start_priority)
 392                         d = UNIT_AFTER;
 393                 else if (t->sysv_start_priority > s->sysv_start_priority)
 394                         d = UNIT_BEFORE;
 395                 else
 396                         continue;
 397
 398                 /* FIXME: Maybe we should compare the name here lexicographically? */
 399
 400                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 401                         return r;
 402         }
 403
 404         return 0;
 405 }
 406
 407 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 408         ExecCommand *c;
 409
 410         if (!(c = new0(ExecCommand, 1)))
 411                 return NULL;
 412
 413         if (!(c->path = strdup(path))) {
 414                 free(c);
 415                 return NULL;
 416         }
 417
 418         if (!(c->argv = strv_new(path, arg1, NULL))) {
 419                 free(c->path);
 420                 free(c);
 421                 return NULL;
 422         }
 423
 424         return c;
 425 }
 426
 427 static int sysv_exec_commands(Service *s) {
 428         ExecCommand *c;
 429
 430         assert(s);
 431         assert(s->sysv_path);
 432
 433         if (!(c = exec_command_new(s->sysv_path, "start")))
 434                 return -ENOMEM;
 435         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 436
 437         if (!(c = exec_command_new(s->sysv_path, "stop")))
 438                 return -ENOMEM;
 439         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 440
 441         if (!(c = exec_command_new(s->sysv_path, "reload")))
 442                 return -ENOMEM;
 443         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 444
 445         return 0;
 446 }
 447
 448 static int service_load_sysv_path(Service *s, const char *path) {
 449         FILE *f;
 450         Unit *u;
 451         unsigned line = 0;
 452         int r;
 453         enum {
 454                 NORMAL,
 455                 DESCRIPTION,
 456                 LSB,
 457                 LSB_DESCRIPTION
 458         } state = NORMAL;
 459         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 460
 461         assert(s);
 462         assert(path);
 463
 464         u = UNIT(s);
 465
 466         if (!(f = fopen(path, "re"))) {
 467                 r = errno == ENOENT ? 0 : -errno;
 468                 goto finish;
 469         }
 470
 471         free(s->sysv_path);
 472         if (!(s->sysv_path = strdup(path))) {
 473                 r = -ENOMEM;
 474                 goto finish;
 475         }
 476
 477         while (!feof(f)) {
 478                 char l[LINE_MAX], *t;
 479
 480                 if (!fgets(l, sizeof(l), f)) {
 481                         if (feof(f))
 482                                 break;
 483
 484                         r = -errno;
 485                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 486                         goto finish;
 487                 }
 488
 489                 line++;
 490
 491                 t = strstrip(l);
 492                 if (*t != '#')
 493                         continue;
 494
 495                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 496                         state = LSB;
 497                         s->sysv_has_lsb = true;
 498                         continue;
 499                 }
 500
 501                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 502                         state = NORMAL;
 503                         continue;
 504                 }
 505
 506                 t++;
 507                 t += strspn(t, WHITESPACE);
 508
 509                 if (state == NORMAL) {
 510
 511                         /* Try to parse Red Hat style chkconfig headers */
 512
 513                         if (startswith_no_case(t, "chkconfig:")) {
 514                                 int start_priority;
 515                                 char runlevels[16], *k;
 516
 517                                 state = NORMAL;
 518
 519                                 if (sscanf(t+10, "%15s %i %*i",
 520                                            runlevels,
 521                                            &start_priority) != 2) {
 522
 523                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 524                                         continue;
 525                                 }
 526
 527                                 /* A start priority gathered from the
 528                                  * symlink farms is preferred over the
 529                                  * data from the LSB header. */
 530                                 if (start_priority < 0 || start_priority > 99)
 531                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 532                                 else if (s->sysv_start_priority < 0)
 533                                         s->sysv_start_priority = start_priority;
 534
 535                                 char_array_0(runlevels);
 536                                 k = delete_chars(runlevels, WHITESPACE "-");
 537
 538                                 if (k[0]) {
 539                                         char *d;
 540
 541                                         if (!(d = strdup(k))) {
 542                                                 r = -ENOMEM;
 543                                                 goto finish;
 544                                         }
 545
 546                                         free(s->sysv_runlevels);
 547                                         s->sysv_runlevels = d;
 548                                 }
 549
 550                         } else if (startswith_no_case(t, "description:")) {
 551
 552                                 size_t k = strlen(t);
 553                                 char *d;
 554                                 const char *j;
 555
 556                                 if (t[k-1] == '\\') {
 557                                         state = DESCRIPTION;
 558                                         t[k-1] = 0;
 559                                 }
 560
 561                                 if ((j = strstrip(t+12)) && *j) {
 562                                         if (!(d = strdup(j))) {
 563                                                 r = -ENOMEM;
 564                                                 goto finish;
 565                                         }
 566                                 } else
 567                                         d = NULL;
 568
 569                                 free(chkconfig_description);
 570                                 chkconfig_description = d;
 571
 572                         } else if (startswith_no_case(t, "pidfile:")) {
 573
 574                                 char *fn;
 575
 576                                 state = NORMAL;
 577
 578                                 fn = strstrip(t+8);
 579                                 if (!path_is_absolute(fn)) {
 580                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 581                                         continue;
 582                                 }
 583
 584                                 if (!(fn = strdup(fn))) {
 585                                         r = -ENOMEM;
 586                                         goto finish;
 587                                 }
 588
 589                                 free(s->pid_file);
 590                                 s->pid_file = fn;
 591                         }
 592
 593                 } else if (state == DESCRIPTION) {
 594
 595                         /* Try to parse Red Hat style description
 596                          * continuation */
 597
 598                         size_t k = strlen(t);
 599                         char *j;
 600
 601                         if (t[k-1] == '\\')
 602                                 t[k-1] = 0;
 603                         else
 604                                 state = NORMAL;
 605
 606                         if ((j = strstrip(t)) && *j) {
 607                                 char *d = NULL;
 608
 609                                 if (chkconfig_description)
 610                                         asprintf(&d, "%s %s", chkconfig_description, j);
 611                                 else
 612                                         d = strdup(j);
 613
 614                                 if (!d) {
 615                                         r = -ENOMEM;
 616                                         goto finish;
 617                                 }
 618
 619                                 free(chkconfig_description);
 620                                 chkconfig_description = d;
 621                         }
 622
 623                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 624
 625                         if (startswith_no_case(t, "Provides:")) {
 626                                 char *i, *w;
 627                                 size_t z;
 628
 629                                 state = LSB;
 630
 631                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 632                                         char *n, *m;
 633
 634                                         if (!(n = strndup(w, z))) {
 635                                                 r = -ENOMEM;
 636                                                 goto finish;
 637                                         }
 638
 639                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 640                                         free(n);
 641
 642                                         if (r < 0)
 643                                                 goto finish;
 644
 645                                         if (r == 0)
 646                                                 continue;
 647
 648                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 649                                                 r = unit_add_name(u, m);
 650                                         else {
 651                                                 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 652
 653                                                 if (s->sysv_enabled) {
 654                                                         int k;
 655
 656                                                         if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
 657                                                                 r = k;
 658                                                 }
 659                                         }
 660
 661                                         if (r < 0)
 662                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 663
 664                                         free(m);
 665                                 }
 666
 667                         } else if (startswith_no_case(t, "Required-Start:") ||
 668                                    startswith_no_case(t, "Should-Start:") ||
 669                                    startswith_no_case(t, "X-Start-Before:") ||
 670                                    startswith_no_case(t, "X-Start-After:")) {
 671                                 char *i, *w;
 672                                 size_t z;
 673
 674                                 state = LSB;
 675
 676                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 677                                         char *n, *m;
 678
 679                                         if (!(n = strndup(w, z))) {
 680                                                 r = -ENOMEM;
 681                                                 goto finish;
 682                                         }
 683
 684                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 685
 686                                         if (r < 0) {
 687                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
 688                                                 free(n);
 689                                                 continue;
 690                                         }
 691
 692                                         free(n);
 693
 694                                         if (r == 0)
 695                                                 continue;
 696
 697                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 698
 699                                         if (r < 0)
 700                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 701
 702                                         free(m);
 703                                 }
 704                         } else if (startswith_no_case(t, "Default-Start:")) {
 705                                 char *k, *d;
 706
 707                                 state = LSB;
 708
 709                                 k = delete_chars(t+14, WHITESPACE "-");
 710
 711                                 if (k[0] != 0) {
 712                                         if (!(d = strdup(k))) {
 713                                                 r = -ENOMEM;
 714                                                 goto finish;
 715                                         }
 716
 717                                         free(s->sysv_runlevels);
 718                                         s->sysv_runlevels = d;
 719                                 }
 720
 721                         } else if (startswith_no_case(t, "Description:")) {
 722                                 char *d, *j;
 723
 724                                 state = LSB_DESCRIPTION;
 725
 726                                 if ((j = strstrip(t+12)) && *j) {
 727                                         if (!(d = strdup(j))) {
 728                                                 r = -ENOMEM;
 729                                                 goto finish;
 730                                         }
 731                                 } else
 732                                         d = NULL;
 733
 734                                 free(long_description);
 735                                 long_description = d;
 736
 737                         } else if (startswith_no_case(t, "Short-Description:")) {
 738                                 char *d, *j;
 739
 740                                 state = LSB;
 741
 742                                 if ((j = strstrip(t+18)) && *j) {
 743                                         if (!(d = strdup(j))) {
 744                                                 r = -ENOMEM;
 745                                                 goto finish;
 746                                         }
 747                                 } else
 748                                         d = NULL;
 749
 750                                 free(short_description);
 751                                 short_description = d;
 752
 753                         } else if (startswith_no_case(t, "X-Interactive:")) {
 754                                 int b;
 755
 756                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 757                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 758                                         continue;
 759                                 }
 760
 761                                 if (b)
 762                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 763                                 else
 764                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 765
 766                         } else if (state == LSB_DESCRIPTION) {
 767
 768                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 769                                         char *j;
 770
 771                                         if ((j = strstrip(t)) && *j) {
 772                                                 char *d = NULL;
 773
 774                                                 if (long_description)
 775                                                         asprintf(&d, "%s %s", long_description, t);
 776                                                 else
 777                                                         d = strdup(j);
 778
 779                                                 if (!d) {
 780                                                         r = -ENOMEM;
 781                                                         goto finish;
 782                                                 }
 783
 784                                                 free(long_description);
 785                                                 long_description = d;
 786                                         }
 787
 788                                 } else
 789                                         state = LSB;
 790                         }
 791                 }
 792         }
 793
 794         if ((r = sysv_exec_commands(s)) < 0)
 795                 goto finish;
 796
 797         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 798                 /* If there a runlevels configured for this service
 799                  * but none of the standard ones, then we assume this
 800                  * is some special kind of service (which might be
 801                  * needed for early boot) and don't create any links
 802                  * to it. */
 803
 804                 s->meta.default_dependencies = false;
 805
 806                 /* Don't timeout special services during boot (like fsck) */
 807                 s->timeout_usec = 0;
 808         } else
 809                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 810
 811         /* Special setting for all SysV services */
 812         s->type = SERVICE_FORKING;
 813         s->remain_after_exit = true;
 814         s->restart = SERVICE_RESTART_NO;
 815         s->exec_context.std_output =
 816                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 817                 ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL;
 818         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 819
 820         /* We use the long description only if
 821          * no short description is set. */
 822
 823         if (short_description)
 824                 description = short_description;
 825         else if (chkconfig_description)
 826                 description = chkconfig_description;
 827         else if (long_description)
 828                 description = long_description;
 829         else
 830                 description = NULL;
 831
 832         if (description) {
 833                 char *d;
 834
 835                 if (!(d = strappend("LSB: ", description))) {
 836                         r = -ENOMEM;
 837                         goto finish;
 838                 }
 839
 840                 u->meta.description = d;
 841         }
 842
 843         u->meta.load_state = UNIT_LOADED;
 844         r = 0;
 845
 846 finish:
 847
 848         if (f)
 849                 fclose(f);
 850
 851         free(short_description);
 852         free(long_description);
 853         free(chkconfig_description);
 854
 855         return r;
 856 }
 857
 858 static int service_load_sysv_name(Service *s, const char *name) {
 859         char **p;
 860
 861         assert(s);
 862         assert(name);
 863
 864         /* For SysV services we strip the boot.*, rc.* and *.sh
 865          * prefixes/suffixes. */
 866 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 867         if (endswith(name, ".sh.service"))
 868                 return -ENOENT;
 869 #endif
 870
 871 #ifdef TARGET_SUSE
 872         if (startswith(name, "boot."))
 873                 return -ENOENT;
 874 #endif
 875
 876 #ifdef TARGET_FRUGALWARE
 877         if (startswith(name, "rc."))
 878                 return -ENOENT;
 879 #endif
 880
 881         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 882                 char *path;
 883                 int r;
 884
 885                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 886                         return -ENOMEM;
 887
 888                 assert(endswith(path, ".service"));
 889                 path[strlen(path)-8] = 0;
 890
 891                 r = service_load_sysv_path(s, path);
 892
 893 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 894                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 895                         /* Try Debian style *.sh source'able init scripts */
 896                         strcat(path, ".sh");
 897                         r = service_load_sysv_path(s, path);
 898                 }
 899 #endif
 900                 free(path);
 901
 902 #ifdef TARGET_SUSE
 903                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 904                         /* Try SUSE style boot.* init scripts */
 905
 906                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 907                                 return -ENOMEM;
 908
 909                         /* Drop .service suffix */
 910                         path[strlen(path)-8] = 0;
 911                         r = service_load_sysv_path(s, path);
 912                         free(path);
 913                 }
 914 #endif
 915
 916 #ifdef TARGET_FRUGALWARE
 917                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 918                         /* Try Frugalware style rc.* init scripts */
 919
 920                         if (asprintf(&path, "%s/rc.%s", *p, name) < 0)
 921                                 return -ENOMEM;
 922
 923                         /* Drop .service suffix */
 924                         path[strlen(path)-8] = 0;
 925                         r = service_load_sysv_path(s, path);
 926                         free(path);
 927                 }
 928 #endif
 929
 930                 if (r < 0)
 931                         return r;
 932
 933                 if ((s->meta.load_state != UNIT_STUB))
 934                         break;
 935         }
 936
 937         return 0;
 938 }
 939
 940 static int service_load_sysv(Service *s) {
 941         const char *t;
 942         Iterator i;
 943         int r;
 944
 945         assert(s);
 946
 947         /* Load service data from SysV init scripts, preferably with
 948          * LSB headers ... */
 949
 950         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 951                 return 0;
 952
 953         if ((t = s->meta.id))
 954                 if ((r = service_load_sysv_name(s, t)) < 0)
 955                         return r;
 956
 957         if (s->meta.load_state == UNIT_STUB)
 958                 SET_FOREACH(t, s->meta.names, i) {
 959                         if (t == s->meta.id)
 960                                 continue;
 961
 962                         if ((r = service_load_sysv_name(s, t)) < 0)
 963                                 return r;
 964
 965                         if (s->meta.load_state != UNIT_STUB)
 966                                 break;
 967                 }
 968
 969         return 0;
 970 }
 971 #endif
 972
 973 static int fsck_fix_order(Service *s) {
 974         Meta *other;
 975         int r;
 976
 977         assert(s);
 978
 979         if (s->fsck_passno <= 0)
 980                 return 0;
 981
 982         /* For each pair of services where both have an fsck priority
 983          * we order things based on it. */
 984
 985         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 986                 Service *t;
 987                 UnitDependency d;
 988
 989                 t = (Service*) other;
 990
 991                 if (s == t)
 992                         continue;
 993
 994                 if (t->meta.load_state != UNIT_LOADED)
 995                         continue;
 996
 997                 if (t->fsck_passno <= 0)
 998                         continue;
 999
1000                 if (t->fsck_passno < s->fsck_passno)
1001                         d = UNIT_AFTER;
1002                 else if (t->fsck_passno > s->fsck_passno)
1003                         d = UNIT_BEFORE;
1004                 else
1005                         continue;
1006
1007                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1008                         return r;
1009         }
1010
1011         return 0;
1012 }
1013
1014 static int service_verify(Service *s) {
1015         assert(s);
1016
1017         if (s->meta.load_state != UNIT_LOADED)
1018                 return 0;
1019
1020         if (!s->exec_command[SERVICE_EXEC_START]) {
1021                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1022                 return -EINVAL;
1023         }
1024
1025         if (s->type != SERVICE_ONESHOT &&
1026             s->exec_command[SERVICE_EXEC_START]->command_next) {
1027                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1028                 return -EINVAL;
1029         }
1030
1031         if (s->type == SERVICE_DBUS && !s->bus_name) {
1032                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1033                 return -EINVAL;
1034         }
1035
1036         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1037                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1038                 return -EINVAL;
1039         }
1040
1041         return 0;
1042 }
1043
1044 static int service_add_default_dependencies(Service *s) {
1045         int r;
1046
1047         assert(s);
1048
1049         /* Add a number of automatic dependencies useful for the
1050          * majority of services. */
1051
1052         /* First, pull in base system */
1053         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1054
1055                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1056                         return r;
1057
1058         } else if (s->meta.manager->running_as == MANAGER_USER) {
1059
1060                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1061                         return r;
1062         }
1063
1064         /* Second, activate normal shutdown */
1065         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1066 }
1067
1068 static int service_load(Unit *u) {
1069         int r;
1070         Service *s = SERVICE(u);
1071
1072         assert(s);
1073
1074         /* Load a .service file */
1075         if ((r = unit_load_fragment(u)) < 0)
1076                 return r;
1077
1078 #ifdef HAVE_SYSV_COMPAT
1079         /* Load a classic init script as a fallback, if we couldn't find anything */
1080         if (u->meta.load_state == UNIT_STUB)
1081                 if ((r = service_load_sysv(s)) < 0)
1082                         return r;
1083 #endif
1084
1085         /* Still nothing found? Then let's give up */
1086         if (u->meta.load_state == UNIT_STUB)
1087                 return -ENOENT;
1088
1089         /* We were able to load something, then let's add in the
1090          * dropin directories. */
1091         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1092                 return r;
1093
1094         /* This is a new unit? Then let's add in some extras */
1095         if (u->meta.load_state == UNIT_LOADED) {
1096                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1097                         return r;
1098
1099                 if ((r = unit_add_default_cgroups(u)) < 0)
1100                         return r;
1101
1102 #ifdef HAVE_SYSV_COMPAT
1103                 if ((r = sysv_fix_order(s)) < 0)
1104                         return r;
1105 #endif
1106
1107                 if ((r = fsck_fix_order(s)) < 0)
1108                         return r;
1109
1110                 if (s->bus_name)
1111                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1112                                 return r;
1113
1114                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1115                         s->notify_access = NOTIFY_MAIN;
1116
1117                 if (s->type == SERVICE_DBUS || s->bus_name)
1118                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1119                                 return r;
1120
1121                 if (s->meta.default_dependencies)
1122                         if ((r = service_add_default_dependencies(s)) < 0)
1123                                 return r;
1124         }
1125
1126         return service_verify(s);
1127 }
1128
1129 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1130
1131         ServiceExecCommand c;
1132         Service *s = SERVICE(u);
1133         const char *prefix2;
1134         char *p2;
1135
1136         assert(s);
1137
1138         p2 = strappend(prefix, "\t");
1139         prefix2 = p2 ? p2 : prefix;
1140
1141         fprintf(f,
1142                 "%sService State: %s\n"
1143                 "%sPermissionsStartOnly: %s\n"
1144                 "%sRootDirectoryStartOnly: %s\n"
1145                 "%sRemainAfterExit: %s\n"
1146                 "%sType: %s\n"
1147                 "%sRestart: %s\n"
1148                 "%sNotifyAccess: %s\n",
1149                 prefix, service_state_to_string(s->state),
1150                 prefix, yes_no(s->permissions_start_only),
1151                 prefix, yes_no(s->root_directory_start_only),
1152                 prefix, yes_no(s->remain_after_exit),
1153                 prefix, service_type_to_string(s->type),
1154                 prefix, service_restart_to_string(s->restart),
1155                 prefix, notify_access_to_string(s->notify_access));
1156
1157         if (s->control_pid > 0)
1158                 fprintf(f,
1159                         "%sControl PID: %lu\n",
1160                         prefix, (unsigned long) s->control_pid);
1161
1162         if (s->main_pid > 0)
1163                 fprintf(f,
1164                         "%sMain PID: %lu\n",
1165                         prefix, (unsigned long) s->main_pid);
1166
1167         if (s->pid_file)
1168                 fprintf(f,
1169                         "%sPIDFile: %s\n",
1170                         prefix, s->pid_file);
1171
1172         if (s->bus_name)
1173                 fprintf(f,
1174                         "%sBusName: %s\n"
1175                         "%sBus Name Good: %s\n",
1176                         prefix, s->bus_name,
1177                         prefix, yes_no(s->bus_name_good));
1178
1179         exec_context_dump(&s->exec_context, f, prefix);
1180
1181         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1182
1183                 if (!s->exec_command[c])
1184                         continue;
1185
1186                 fprintf(f, "%s-> %s:\n",
1187                         prefix, service_exec_command_to_string(c));
1188
1189                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1190         }
1191
1192 #ifdef HAVE_SYSV_COMPAT
1193         if (s->sysv_path)
1194                 fprintf(f,
1195                         "%sSysV Init Script Path: %s\n"
1196                         "%sSysV Init Script has LSB Header: %s\n"
1197                         "%sSysVEnabled: %s\n",
1198                         prefix, s->sysv_path,
1199                         prefix, yes_no(s->sysv_has_lsb),
1200                         prefix, yes_no(s->sysv_enabled));
1201
1202         if (s->sysv_start_priority >= 0)
1203                 fprintf(f,
1204                         "%sSysVStartPriority: %i\n",
1205                         prefix, s->sysv_start_priority);
1206
1207         if (s->sysv_runlevels)
1208                 fprintf(f, "%sSysVRunLevels: %s\n",
1209                         prefix, s->sysv_runlevels);
1210 #endif
1211
1212         if (s->fsck_passno > 0)
1213                 fprintf(f,
1214                         "%sFsckPassNo: %i\n",
1215                         prefix, s->fsck_passno);
1216
1217         if (s->status_text)
1218                 fprintf(f, "%sStatus Text: %s\n",
1219                         prefix, s->status_text);
1220
1221         free(p2);
1222 }
1223
1224 static int service_load_pid_file(Service *s) {
1225         char *k;
1226         int r;
1227         pid_t pid;
1228
1229         assert(s);
1230
1231         if (s->main_pid_known)
1232                 return 0;
1233
1234         assert(s->main_pid <= 0);
1235
1236         if (!s->pid_file)
1237                 return -ENOENT;
1238
1239         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1240                 return r;
1241
1242         r = parse_pid(k, &pid);
1243         free(k);
1244
1245         if (r < 0)
1246                 return r;
1247
1248         if (kill(pid, 0) < 0 && errno != EPERM) {
1249                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1250                             (unsigned long) pid, s->pid_file);
1251                 return -ESRCH;
1252         }
1253
1254         if ((r = service_set_main_pid(s, pid)) < 0)
1255                 return r;
1256
1257         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1258                 /* FIXME: we need to do something here */
1259                 return r;
1260
1261         return 0;
1262 }
1263
1264 static int service_search_main_pid(Service *s) {
1265         pid_t pid;
1266         int r;
1267
1268         assert(s);
1269
1270         if (s->main_pid_known)
1271                 return 0;
1272
1273         assert(s->main_pid <= 0);
1274
1275         if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1276                 return -ENOENT;
1277
1278         if ((r = service_set_main_pid(s, pid)) < 0)
1279                 return r;
1280
1281         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1282                 /* FIXME: we need to do something here */
1283                 return r;
1284
1285         return 0;
1286 }
1287
1288 static int service_get_sockets(Service *s, Set **_set) {
1289         Set *set;
1290         Iterator i;
1291         char *t;
1292         int r;
1293
1294         assert(s);
1295         assert(_set);
1296
1297         if (s->socket_fd >= 0)
1298                 return 0;
1299
1300         if (!set_isempty(s->configured_sockets))
1301                 return 0;
1302
1303         /* Collects all Socket objects that belong to this
1304          * service. Note that a service might have multiple sockets
1305          * via multiple names. */
1306
1307         if (!(set = set_new(NULL, NULL)))
1308                 return -ENOMEM;
1309
1310         SET_FOREACH(t, s->meta.names, i) {
1311                 char *k;
1312                 Unit *p;
1313
1314                 /* Look for all socket objects that go by any of our
1315                  * units and collect their fds */
1316
1317                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1318                         r = -ENOMEM;
1319                         goto fail;
1320                 }
1321
1322                 p = manager_get_unit(s->meta.manager, k);
1323                 free(k);
1324
1325                 if (!p)
1326                         continue;
1327
1328                 if ((r = set_put(set, p)) < 0)
1329                         goto fail;
1330         }
1331
1332         *_set = set;
1333         return 0;
1334
1335 fail:
1336         set_free(set);
1337         return r;
1338 }
1339
1340 static int service_notify_sockets_dead(Service *s) {
1341         Iterator i;
1342         Set *set, *free_set = NULL;
1343         Socket *sock;
1344         int r;
1345
1346         assert(s);
1347
1348         /* Notifies all our sockets when we die */
1349
1350         if (s->socket_fd >= 0)
1351                 return 0;
1352
1353         if (!set_isempty(s->configured_sockets))
1354                 set = s->configured_sockets;
1355         else {
1356                 if ((r = service_get_sockets(s, &free_set)) < 0)
1357                         return r;
1358
1359                 set = free_set;
1360         }
1361
1362         SET_FOREACH(sock, set, i)
1363                 socket_notify_service_dead(sock);
1364
1365         set_free(free_set);
1366
1367         return 0;
1368 }
1369
1370 static void service_set_state(Service *s, ServiceState state) {
1371         ServiceState old_state;
1372         assert(s);
1373
1374         old_state = s->state;
1375         s->state = state;
1376
1377         if (state != SERVICE_START_PRE &&
1378             state != SERVICE_START &&
1379             state != SERVICE_START_POST &&
1380             state != SERVICE_RELOAD &&
1381             state != SERVICE_STOP &&
1382             state != SERVICE_STOP_SIGTERM &&
1383             state != SERVICE_STOP_SIGKILL &&
1384             state != SERVICE_STOP_POST &&
1385             state != SERVICE_FINAL_SIGTERM &&
1386             state != SERVICE_FINAL_SIGKILL &&
1387             state != SERVICE_AUTO_RESTART)
1388                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1389
1390         if (state != SERVICE_START &&
1391             state != SERVICE_START_POST &&
1392             state != SERVICE_RUNNING &&
1393             state != SERVICE_RELOAD &&
1394             state != SERVICE_STOP &&
1395             state != SERVICE_STOP_SIGTERM &&
1396             state != SERVICE_STOP_SIGKILL)
1397                 service_unwatch_main_pid(s);
1398
1399         if (state != SERVICE_START_PRE &&
1400             state != SERVICE_START &&
1401             state != SERVICE_START_POST &&
1402             state != SERVICE_RELOAD &&
1403             state != SERVICE_STOP &&
1404             state != SERVICE_STOP_SIGTERM &&
1405             state != SERVICE_STOP_SIGKILL &&
1406             state != SERVICE_STOP_POST &&
1407             state != SERVICE_FINAL_SIGTERM &&
1408             state != SERVICE_FINAL_SIGKILL) {
1409                 service_unwatch_control_pid(s);
1410                 s->control_command = NULL;
1411                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1412         }
1413
1414         if (state == SERVICE_DEAD ||
1415             state == SERVICE_STOP ||
1416             state == SERVICE_STOP_SIGTERM ||
1417             state == SERVICE_STOP_SIGKILL ||
1418             state == SERVICE_STOP_POST ||
1419             state == SERVICE_FINAL_SIGTERM ||
1420             state == SERVICE_FINAL_SIGKILL ||
1421             state == SERVICE_FAILED ||
1422             state == SERVICE_AUTO_RESTART)
1423                 service_notify_sockets_dead(s);
1424
1425         if (state != SERVICE_START_PRE &&
1426             state != SERVICE_START &&
1427             state != SERVICE_START_POST &&
1428             state != SERVICE_RUNNING &&
1429             state != SERVICE_RELOAD &&
1430             state != SERVICE_STOP &&
1431             state != SERVICE_STOP_SIGTERM &&
1432             state != SERVICE_STOP_SIGKILL &&
1433             state != SERVICE_STOP_POST &&
1434             state != SERVICE_FINAL_SIGTERM &&
1435             state != SERVICE_FINAL_SIGKILL &&
1436             !(state == SERVICE_DEAD && s->meta.job)) {
1437                 service_close_socket_fd(s);
1438                 service_connection_unref(s);
1439         }
1440
1441         /* For the inactive states unit_notify() will trim the cgroup,
1442          * but for exit we have to do that ourselves... */
1443         if (state == SERVICE_EXITED)
1444                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1445
1446         if (old_state != state)
1447                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1448
1449         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1450         s->reload_failure = false;
1451 }
1452
1453 static int service_coldplug(Unit *u) {
1454         Service *s = SERVICE(u);
1455         int r;
1456
1457         assert(s);
1458         assert(s->state == SERVICE_DEAD);
1459
1460         if (s->deserialized_state != s->state) {
1461
1462                 if (s->deserialized_state == SERVICE_START_PRE ||
1463                     s->deserialized_state == SERVICE_START ||
1464                     s->deserialized_state == SERVICE_START_POST ||
1465                     s->deserialized_state == SERVICE_RELOAD ||
1466                     s->deserialized_state == SERVICE_STOP ||
1467                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1468                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1469                     s->deserialized_state == SERVICE_STOP_POST ||
1470                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1471                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1472                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1473
1474                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1475                                 usec_t k;
1476
1477                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1478
1479                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1480                                         return r;
1481                         }
1482                 }
1483
1484                 if ((s->deserialized_state == SERVICE_START &&
1485                      (s->type == SERVICE_FORKING ||
1486                       s->type == SERVICE_DBUS ||
1487                       s->type == SERVICE_ONESHOT ||
1488                       s->type == SERVICE_NOTIFY)) ||
1489                     s->deserialized_state == SERVICE_START_POST ||
1490                     s->deserialized_state == SERVICE_RUNNING ||
1491                     s->deserialized_state == SERVICE_RELOAD ||
1492                     s->deserialized_state == SERVICE_STOP ||
1493                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1494                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1495                         if (s->main_pid > 0)
1496                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1497                                         return r;
1498
1499                 if (s->deserialized_state == SERVICE_START_PRE ||
1500                     s->deserialized_state == SERVICE_START ||
1501                     s->deserialized_state == SERVICE_START_POST ||
1502                     s->deserialized_state == SERVICE_RELOAD ||
1503                     s->deserialized_state == SERVICE_STOP ||
1504                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1505                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1506                     s->deserialized_state == SERVICE_STOP_POST ||
1507                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1508                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1509                         if (s->control_pid > 0)
1510                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1511                                         return r;
1512
1513                 service_set_state(s, s->deserialized_state);
1514         }
1515
1516         return 0;
1517 }
1518
1519 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1520         Iterator i;
1521         int r;
1522         int *rfds = NULL;
1523         unsigned rn_fds = 0;
1524         Set *set, *free_set = NULL;
1525         Socket *sock;
1526
1527         assert(s);
1528         assert(fds);
1529         assert(n_fds);
1530
1531         if (s->socket_fd >= 0)
1532                 return 0;
1533
1534         if (!set_isempty(s->configured_sockets))
1535                 set = s->configured_sockets;
1536         else {
1537                 if ((r = service_get_sockets(s, &free_set)) < 0)
1538                         return r;
1539
1540                 set = free_set;
1541         }
1542
1543         SET_FOREACH(sock, set, i) {
1544                 int *cfds;
1545                 unsigned cn_fds;
1546
1547                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1548                         goto fail;
1549
1550                 if (!cfds)
1551                         continue;
1552
1553                 if (!rfds) {
1554                         rfds = cfds;
1555                         rn_fds = cn_fds;
1556                 } else {
1557                         int *t;
1558
1559                         if (!(t = new(int, rn_fds+cn_fds))) {
1560                                 free(cfds);
1561                                 r = -ENOMEM;
1562                                 goto fail;
1563                         }
1564
1565                         memcpy(t, rfds, rn_fds);
1566                         memcpy(t+rn_fds, cfds, cn_fds);
1567                         free(rfds);
1568                         free(cfds);
1569
1570                         rfds = t;
1571                         rn_fds = rn_fds+cn_fds;
1572                 }
1573         }
1574
1575         *fds = rfds;
1576         *n_fds = rn_fds;
1577
1578         set_free(free_set);
1579
1580         return 0;
1581
1582 fail:
1583         set_free(set);
1584         free(rfds);
1585
1586         return r;
1587 }
1588
1589 static int service_spawn(
1590                 Service *s,
1591                 ExecCommand *c,
1592                 bool timeout,
1593                 bool pass_fds,
1594                 bool apply_permissions,
1595                 bool apply_chroot,
1596                 bool apply_tty_stdin,
1597                 bool set_notify_socket,
1598                 pid_t *_pid) {
1599
1600         pid_t pid;
1601         int r;
1602         int *fds = NULL, *fdsbuf = NULL;
1603         unsigned n_fds = 0, n_env = 0;
1604         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1605
1606         assert(s);
1607         assert(c);
1608         assert(_pid);
1609
1610         if (pass_fds ||
1611             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1612             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1613             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1614
1615                 if (s->socket_fd >= 0) {
1616                         fds = &s->socket_fd;
1617                         n_fds = 1;
1618                 } else {
1619                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1620                                 goto fail;
1621
1622                         fds = fdsbuf;
1623                 }
1624         }
1625
1626         if (timeout && s->timeout_usec) {
1627                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1628                         goto fail;
1629         } else
1630                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1631
1632         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1633                 r = -ENOMEM;
1634                 goto fail;
1635         }
1636
1637         if (!(our_env = new0(char*, 4))) {
1638                 r = -ENOMEM;
1639                 goto fail;
1640         }
1641
1642         if (set_notify_socket)
1643                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1644                         r = -ENOMEM;
1645                         goto fail;
1646                 }
1647
1648         if (s->main_pid > 0)
1649                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1650                         r = -ENOMEM;
1651                         goto fail;
1652                 }
1653
1654         if (!(final_env = strv_env_merge(2,
1655                                          s->meta.manager->environment,
1656                                          our_env,
1657                                          NULL))) {
1658                 r = -ENOMEM;
1659                 goto fail;
1660         }
1661
1662         r = exec_spawn(c,
1663                        argv,
1664                        &s->exec_context,
1665                        fds, n_fds,
1666                        final_env,
1667                        apply_permissions,
1668                        apply_chroot,
1669                        apply_tty_stdin,
1670                        s->meta.manager->confirm_spawn,
1671                        s->meta.cgroup_bondings,
1672                        &pid);
1673
1674         if (r < 0)
1675                 goto fail;
1676
1677
1678         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1679                 /* FIXME: we need to do something here */
1680                 goto fail;
1681
1682         free(fdsbuf);
1683         strv_free(argv);
1684         strv_free(our_env);
1685         strv_free(final_env);
1686
1687         *_pid = pid;
1688
1689         return 0;
1690
1691 fail:
1692         free(fdsbuf);
1693         strv_free(argv);
1694         strv_free(our_env);
1695         strv_free(final_env);
1696
1697         if (timeout)
1698                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1699
1700         return r;
1701 }
1702
1703 static int main_pid_good(Service *s) {
1704         assert(s);
1705
1706         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1707          * don't know */
1708
1709         /* If we know the pid file, then lets just check if it is
1710          * still valid */
1711         if (s->main_pid_known)
1712                 return s->main_pid > 0;
1713
1714         /* We don't know the pid */
1715         return -EAGAIN;
1716 }
1717
1718 static int control_pid_good(Service *s) {
1719         assert(s);
1720
1721         return s->control_pid > 0;
1722 }
1723
1724 static int cgroup_good(Service *s) {
1725         int r;
1726
1727         assert(s);
1728
1729         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1730                 return r;
1731
1732         return !r;
1733 }
1734
1735 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1736         int r;
1737         assert(s);
1738
1739         if (!success)
1740                 s->failure = true;
1741
1742         if (allow_restart &&
1743             !s->forbid_restart &&
1744             (s->restart == SERVICE_RESTART_ALWAYS ||
1745              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1746              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1747              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1748               (s->main_exec_status.code == CLD_KILLED ||
1749                s->main_exec_status.code == CLD_DUMPED)))) {
1750
1751                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1752                         goto fail;
1753
1754                 service_set_state(s, SERVICE_AUTO_RESTART);
1755         } else
1756                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1757
1758         s->forbid_restart = false;
1759
1760         return;
1761
1762 fail:
1763         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1764         service_enter_dead(s, false, false);
1765 }
1766
1767 static void service_enter_signal(Service *s, ServiceState state, bool success);
1768
1769 static void service_enter_stop_post(Service *s, bool success) {
1770         int r;
1771         assert(s);
1772
1773         if (!success)
1774                 s->failure = true;
1775
1776         service_unwatch_control_pid(s);
1777
1778         s->control_command_id = SERVICE_EXEC_STOP_POST;
1779         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1780                 if ((r = service_spawn(s,
1781                                        s->control_command,
1782                                        true,
1783                                        false,
1784                                        !s->permissions_start_only,
1785                                        !s->root_directory_start_only,
1786                                        true,
1787                                        false,
1788                                        &s->control_pid)) < 0)
1789                         goto fail;
1790
1791
1792                 service_set_state(s, SERVICE_STOP_POST);
1793         } else
1794                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1795
1796         return;
1797
1798 fail:
1799         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1800         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1801 }
1802
1803 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1804         int r;
1805         Set *pid_set = NULL;
1806         bool wait_for_exit = false;
1807
1808         assert(s);
1809
1810         if (!success)
1811                 s->failure = true;
1812
1813         if (s->exec_context.kill_mode != KILL_NONE) {
1814                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1815
1816                 if (s->main_pid > 0) {
1817                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1818                                  -s->main_pid :
1819                                  s->main_pid, sig) < 0 && errno != ESRCH)
1820
1821                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1822                         else
1823                                 wait_for_exit = true;
1824                 }
1825
1826                 if (s->control_pid > 0) {
1827                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1828                                  -s->control_pid :
1829                                  s->control_pid, sig) < 0 && errno != ESRCH)
1830
1831                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1832                         else
1833                                 wait_for_exit = true;
1834                 }
1835
1836                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1837
1838                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1839                                 r = -ENOMEM;
1840                                 goto fail;
1841                         }
1842
1843                         /* Exclude the main/control pids from being killed via the cgroup */
1844                         if (s->main_pid > 0)
1845                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1846                                         goto fail;
1847
1848                         if (s->control_pid > 0)
1849                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1850                                         goto fail;
1851
1852                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1853                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1854                                         log_warning("Failed to kill control group: %s", strerror(-r));
1855                         } else if (r > 0)
1856                                 wait_for_exit = true;
1857
1858                         set_free(pid_set);
1859                 }
1860         }
1861
1862         if (wait_for_exit) {
1863                 if (s->timeout_usec > 0)
1864                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1865                                 goto fail;
1866
1867                 service_set_state(s, state);
1868         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1869                 service_enter_stop_post(s, true);
1870         else
1871                 service_enter_dead(s, true, true);
1872
1873         return;
1874
1875 fail:
1876         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1877
1878         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1879                 service_enter_stop_post(s, false);
1880         else
1881                 service_enter_dead(s, false, true);
1882
1883         if (pid_set)
1884                 set_free(pid_set);
1885 }
1886
1887 static void service_enter_stop(Service *s, bool success) {
1888         int r;
1889
1890         assert(s);
1891
1892         if (!success)
1893                 s->failure = true;
1894
1895         service_unwatch_control_pid(s);
1896
1897         s->control_command_id = SERVICE_EXEC_STOP;
1898         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1899                 if ((r = service_spawn(s,
1900                                        s->control_command,
1901                                        true,
1902                                        false,
1903                                        !s->permissions_start_only,
1904                                        !s->root_directory_start_only,
1905                                        false,
1906                                        false,
1907                                        &s->control_pid)) < 0)
1908                         goto fail;
1909
1910                 service_set_state(s, SERVICE_STOP);
1911         } else
1912                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1913
1914         return;
1915
1916 fail:
1917         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1918         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1919 }
1920
1921 static void service_enter_running(Service *s, bool success) {
1922         int main_pid_ok, cgroup_ok;
1923         assert(s);
1924
1925         if (!success)
1926                 s->failure = true;
1927
1928         main_pid_ok = main_pid_good(s);
1929         cgroup_ok = cgroup_good(s);
1930
1931         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1932             (s->bus_name_good || s->type != SERVICE_DBUS))
1933                 service_set_state(s, SERVICE_RUNNING);
1934         else if (s->remain_after_exit)
1935                 service_set_state(s, SERVICE_EXITED);
1936         else
1937                 service_enter_stop(s, true);
1938 }
1939
1940 static void service_enter_start_post(Service *s) {
1941         int r;
1942         assert(s);
1943
1944         service_unwatch_control_pid(s);
1945
1946         s->control_command_id = SERVICE_EXEC_START_POST;
1947         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1948                 if ((r = service_spawn(s,
1949                                        s->control_command,
1950                                        true,
1951                                        false,
1952                                        !s->permissions_start_only,
1953                                        !s->root_directory_start_only,
1954                                        false,
1955                                        false,
1956                                        &s->control_pid)) < 0)
1957                         goto fail;
1958
1959                 service_set_state(s, SERVICE_START_POST);
1960         } else
1961                 service_enter_running(s, true);
1962
1963         return;
1964
1965 fail:
1966         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1967         service_enter_stop(s, false);
1968 }
1969
1970 static void service_enter_start(Service *s) {
1971         pid_t pid;
1972         int r;
1973
1974         assert(s);
1975
1976         assert(s->exec_command[SERVICE_EXEC_START]);
1977         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1978
1979         if (s->type == SERVICE_FORKING)
1980                 service_unwatch_control_pid(s);
1981         else
1982                 service_unwatch_main_pid(s);
1983
1984         s->control_command_id = SERVICE_EXEC_START;
1985         s->control_command = s->exec_command[SERVICE_EXEC_START];
1986
1987         if ((r = service_spawn(s,
1988                                s->control_command,
1989                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1990                                true,
1991                                true,
1992                                true,
1993                                true,
1994                                s->notify_access != NOTIFY_NONE,
1995                                &pid)) < 0)
1996                 goto fail;
1997
1998         if (s->type == SERVICE_SIMPLE) {
1999                 /* For simple services we immediately start
2000                  * the START_POST binaries. */
2001
2002                 service_set_main_pid(s, pid);
2003                 service_enter_start_post(s);
2004
2005         } else  if (s->type == SERVICE_FORKING) {
2006
2007                 /* For forking services we wait until the start
2008                  * process exited. */
2009
2010                 s->control_pid = pid;
2011                 service_set_state(s, SERVICE_START);
2012
2013         } else if (s->type == SERVICE_ONESHOT ||
2014                    s->type == SERVICE_DBUS ||
2015                    s->type == SERVICE_NOTIFY) {
2016
2017                 /* For oneshot services we wait until the start
2018                  * process exited, too, but it is our main process. */
2019
2020                 /* For D-Bus services we know the main pid right away,
2021                  * but wait for the bus name to appear on the
2022                  * bus. Notify services are similar. */
2023
2024                 service_set_main_pid(s, pid);
2025                 service_set_state(s, SERVICE_START);
2026         } else
2027                 assert_not_reached("Unknown service type");
2028
2029         return;
2030
2031 fail:
2032         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2033         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2034 }
2035
2036 static void service_enter_start_pre(Service *s) {
2037         int r;
2038
2039         assert(s);
2040
2041         service_unwatch_control_pid(s);
2042
2043         s->control_command_id = SERVICE_EXEC_START_PRE;
2044         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2045                 if ((r = service_spawn(s,
2046                                        s->control_command,
2047                                        true,
2048                                        false,
2049                                        !s->permissions_start_only,
2050                                        !s->root_directory_start_only,
2051                                        true,
2052                                        false,
2053                                        &s->control_pid)) < 0)
2054                         goto fail;
2055
2056                 service_set_state(s, SERVICE_START_PRE);
2057         } else
2058                 service_enter_start(s);
2059
2060         return;
2061
2062 fail:
2063         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2064         service_enter_dead(s, false, true);
2065 }
2066
2067 static void service_enter_restart(Service *s) {
2068         int r;
2069         DBusError error;
2070
2071         assert(s);
2072         dbus_error_init(&error);
2073
2074         if (s->meta.job) {
2075                 log_info("Job pending for unit, delaying automatic restart.");
2076
2077                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2078                         goto fail;
2079         }
2080
2081         service_enter_dead(s, true, false);
2082
2083         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2084                 goto fail;
2085
2086         log_debug("%s scheduled restart job.", s->meta.id);
2087         return;
2088
2089 fail:
2090         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2091         service_enter_dead(s, false, false);
2092
2093         dbus_error_free(&error);
2094 }
2095
2096 static void service_enter_reload(Service *s) {
2097         int r;
2098
2099         assert(s);
2100
2101         service_unwatch_control_pid(s);
2102
2103         s->control_command_id = SERVICE_EXEC_RELOAD;
2104         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2105                 if ((r = service_spawn(s,
2106                                        s->control_command,
2107                                        true,
2108                                        false,
2109                                        !s->permissions_start_only,
2110                                        !s->root_directory_start_only,
2111                                        false,
2112                                        false,
2113                                        &s->control_pid)) < 0)
2114                         goto fail;
2115
2116                 service_set_state(s, SERVICE_RELOAD);
2117         } else
2118                 service_enter_running(s, true);
2119
2120         return;
2121
2122 fail:
2123         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2124         s->reload_failure = true;
2125         service_enter_running(s, true);
2126 }
2127
2128 static void service_run_next_control(Service *s, bool success) {
2129         int r;
2130
2131         assert(s);
2132         assert(s->control_command);
2133         assert(s->control_command->command_next);
2134
2135         if (!success)
2136                 s->failure = true;
2137
2138         assert(s->control_command_id != SERVICE_EXEC_START);
2139
2140         s->control_command = s->control_command->command_next;
2141         service_unwatch_control_pid(s);
2142
2143         if ((r = service_spawn(s,
2144                                s->control_command,
2145                                true,
2146                                false,
2147                                !s->permissions_start_only,
2148                                !s->root_directory_start_only,
2149                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2150                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2151                                false,
2152                                &s->control_pid)) < 0)
2153                 goto fail;
2154
2155         return;
2156
2157 fail:
2158         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2159
2160         if (s->state == SERVICE_START_PRE)
2161                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2162         else if (s->state == SERVICE_STOP)
2163                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2164         else if (s->state == SERVICE_STOP_POST)
2165                 service_enter_dead(s, false, true);
2166         else if (s->state == SERVICE_RELOAD) {
2167                 s->reload_failure = true;
2168                 service_enter_running(s, true);
2169         } else
2170                 service_enter_stop(s, false);
2171 }
2172
2173 static void service_run_next_main(Service *s, bool success) {
2174         pid_t pid;
2175         int r;
2176
2177         assert(s);
2178         assert(s->control_command);
2179         assert(s->control_command->command_next);
2180
2181         if (!success)
2182                 s->failure = true;
2183
2184         assert(s->control_command_id == SERVICE_EXEC_START);
2185         assert(s->type == SERVICE_ONESHOT);
2186
2187         s->control_command = s->control_command->command_next;
2188         service_unwatch_main_pid(s);
2189
2190         if ((r = service_spawn(s,
2191                                s->control_command,
2192                                false,
2193                                true,
2194                                true,
2195                                true,
2196                                true,
2197                                s->notify_access != NOTIFY_NONE,
2198                                &pid)) < 0)
2199                 goto fail;
2200
2201         service_set_main_pid(s, pid);
2202
2203         return;
2204
2205 fail:
2206         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2207         service_enter_stop(s, false);
2208 }
2209
2210 static int service_start(Unit *u) {
2211         Service *s = SERVICE(u);
2212
2213         assert(s);
2214
2215         /* We cannot fulfill this request right now, try again later
2216          * please! */
2217         if (s->state == SERVICE_STOP ||
2218             s->state == SERVICE_STOP_SIGTERM ||
2219             s->state == SERVICE_STOP_SIGKILL ||
2220             s->state == SERVICE_STOP_POST ||
2221             s->state == SERVICE_FINAL_SIGTERM ||
2222             s->state == SERVICE_FINAL_SIGKILL)
2223                 return -EAGAIN;
2224
2225         /* Already on it! */
2226         if (s->state == SERVICE_START_PRE ||
2227             s->state == SERVICE_START ||
2228             s->state == SERVICE_START_POST)
2229                 return 0;
2230
2231         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2232
2233         /* Make sure we don't enter a busy loop of some kind. */
2234         if (!ratelimit_test(&s->ratelimit)) {
2235                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2236                 return -ECANCELED;
2237         }
2238
2239         s->failure = false;
2240         s->main_pid_known = false;
2241         s->forbid_restart = false;
2242
2243         service_enter_start_pre(s);
2244         return 0;
2245 }
2246
2247 static int service_stop(Unit *u) {
2248         Service *s = SERVICE(u);
2249
2250         assert(s);
2251
2252         /* This is a user request, so don't do restarts on this
2253          * shutdown. */
2254         s->forbid_restart = true;
2255
2256         /* Already on it */
2257         if (s->state == SERVICE_STOP ||
2258             s->state == SERVICE_STOP_SIGTERM ||
2259             s->state == SERVICE_STOP_SIGKILL ||
2260             s->state == SERVICE_STOP_POST ||
2261             s->state == SERVICE_FINAL_SIGTERM ||
2262             s->state == SERVICE_FINAL_SIGKILL)
2263                 return 0;
2264
2265         /* Don't allow a restart */
2266         if (s->state == SERVICE_AUTO_RESTART) {
2267                 service_set_state(s, SERVICE_DEAD);
2268                 return 0;
2269         }
2270
2271         /* If there's already something running we go directly into
2272          * kill mode. */
2273         if (s->state == SERVICE_START_PRE ||
2274             s->state == SERVICE_START ||
2275             s->state == SERVICE_START_POST ||
2276             s->state == SERVICE_RELOAD) {
2277                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2278                 return 0;
2279         }
2280
2281         assert(s->state == SERVICE_RUNNING ||
2282                s->state == SERVICE_EXITED);
2283
2284         service_enter_stop(s, true);
2285         return 0;
2286 }
2287
2288 static int service_reload(Unit *u) {
2289         Service *s = SERVICE(u);
2290
2291         assert(s);
2292
2293         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2294
2295         service_enter_reload(s);
2296         return 0;
2297 }
2298
2299 static bool service_can_reload(Unit *u) {
2300         Service *s = SERVICE(u);
2301
2302         assert(s);
2303
2304         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2305 }
2306
2307 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2308         Service *s = SERVICE(u);
2309
2310         assert(u);
2311         assert(f);
2312         assert(fds);
2313
2314         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2315         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2316
2317         if (s->control_pid > 0)
2318                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2319
2320         if (s->main_pid_known && s->main_pid > 0)
2321                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2322
2323         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2324
2325         if (s->status_text)
2326                 unit_serialize_item(u, f, "status-text", s->status_text);
2327
2328         /* There's a minor uncleanliness here: if there are multiple
2329          * commands attached here, we will start from the first one
2330          * again */
2331         if (s->control_command_id >= 0)
2332                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2333
2334         if (s->socket_fd >= 0) {
2335                 int copy;
2336
2337                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2338                         return copy;
2339
2340                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2341         }
2342
2343         if (s->main_exec_status.pid > 0) {
2344                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2345                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2346                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2347
2348                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2349                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2350                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2351                 }
2352         }
2353
2354         return 0;
2355 }
2356
2357 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2358         Service *s = SERVICE(u);
2359
2360         assert(u);
2361         assert(key);
2362         assert(value);
2363         assert(fds);
2364
2365         if (streq(key, "state")) {
2366                 ServiceState state;
2367
2368                 if ((state = service_state_from_string(value)) < 0)
2369                         log_debug("Failed to parse state value %s", value);
2370                 else
2371                         s->deserialized_state = state;
2372         } else if (streq(key, "failure")) {
2373                 int b;
2374
2375                 if ((b = parse_boolean(value)) < 0)
2376                         log_debug("Failed to parse failure value %s", value);
2377                 else
2378                         s->failure = b || s->failure;
2379         } else if (streq(key, "control-pid")) {
2380                 pid_t pid;
2381
2382                 if (parse_pid(value, &pid) < 0)
2383                         log_debug("Failed to parse control-pid value %s", value);
2384                 else
2385                         s->control_pid = pid;
2386         } else if (streq(key, "main-pid")) {
2387                 pid_t pid;
2388
2389                 if (parse_pid(value, &pid) < 0)
2390                         log_debug("Failed to parse main-pid value %s", value);
2391                 else
2392                         service_set_main_pid(s, (pid_t) pid);
2393         } else if (streq(key, "main-pid-known")) {
2394                 int b;
2395
2396                 if ((b = parse_boolean(value)) < 0)
2397                         log_debug("Failed to parse main-pid-known value %s", value);
2398                 else
2399                         s->main_pid_known = b;
2400         } else if (streq(key, "status-text")) {
2401                 char *t;
2402
2403                 if ((t = strdup(value))) {
2404                         free(s->status_text);
2405                         s->status_text = t;
2406                 }
2407
2408         } else if (streq(key, "control-command")) {
2409                 ServiceExecCommand id;
2410
2411                 if ((id = service_exec_command_from_string(value)) < 0)
2412                         log_debug("Failed to parse exec-command value %s", value);
2413                 else {
2414                         s->control_command_id = id;
2415                         s->control_command = s->exec_command[id];
2416                 }
2417         } else if (streq(key, "socket-fd")) {
2418                 int fd;
2419
2420                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2421                         log_debug("Failed to parse socket-fd value %s", value);
2422                 else {
2423
2424                         if (s->socket_fd >= 0)
2425                                 close_nointr_nofail(s->socket_fd);
2426                         s->socket_fd = fdset_remove(fds, fd);
2427                 }
2428         } else if (streq(key, "main-exec-status-pid")) {
2429                 pid_t pid;
2430
2431                 if (parse_pid(value, &pid) < 0)
2432                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2433                 else
2434                         s->main_exec_status.pid = pid;
2435         } else if (streq(key, "main-exec-status-code")) {
2436                 int i;
2437
2438                 if (safe_atoi(value, &i) < 0)
2439                         log_debug("Failed to parse main-exec-status-code value %s", value);
2440                 else
2441                         s->main_exec_status.code = i;
2442         } else if (streq(key, "main-exec-status-status")) {
2443                 int i;
2444
2445                 if (safe_atoi(value, &i) < 0)
2446                         log_debug("Failed to parse main-exec-status-status value %s", value);
2447                 else
2448                         s->main_exec_status.status = i;
2449         } else if (streq(key, "main-exec-status-start"))
2450                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2451         else if (streq(key, "main-exec-status-exit"))
2452                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2453         else
2454                 log_debug("Unknown serialization key '%s'", key);
2455
2456         return 0;
2457 }
2458
2459 static UnitActiveState service_active_state(Unit *u) {
2460         assert(u);
2461
2462         return state_translation_table[SERVICE(u)->state];
2463 }
2464
2465 static const char *service_sub_state_to_string(Unit *u) {
2466         assert(u);
2467
2468         return service_state_to_string(SERVICE(u)->state);
2469 }
2470
2471 #ifdef HAVE_SYSV_COMPAT
2472 static bool service_check_gc(Unit *u) {
2473         Service *s = SERVICE(u);
2474
2475         assert(s);
2476
2477         return !!s->sysv_path;
2478 }
2479 #endif
2480
2481 static bool service_check_snapshot(Unit *u) {
2482         Service *s = SERVICE(u);
2483
2484         assert(s);
2485
2486         return !s->got_socket_fd;
2487 }
2488
2489 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2490         Service *s = SERVICE(u);
2491         bool success;
2492
2493         assert(s);
2494         assert(pid >= 0);
2495
2496         if (!s->meta.fragment_path)
2497                 success = is_clean_exit_lsb(code, status);
2498         else
2499                 success = is_clean_exit(code, status);
2500
2501         if (s->main_pid == pid) {
2502
2503                 s->main_pid = 0;
2504                 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2505
2506                 if (s->type != SERVICE_FORKING && s->control_command) {
2507                         s->control_command->exec_status = s->main_exec_status;
2508
2509                         if (s->control_command->ignore)
2510                                 success = true;
2511                 }
2512
2513                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2514                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2515                 s->failure = s->failure || !success;
2516
2517                 if (s->control_command &&
2518                     s->control_command->command_next &&
2519                     success) {
2520
2521                         /* There is another command to *
2522                          * execute, so let's do that. */
2523
2524                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2525                         service_run_next_main(s, success);
2526
2527                 } else {
2528
2529                         /* The service exited, so the service is officially
2530                          * gone. */
2531
2532                         s->control_command = NULL;
2533                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2534
2535                         switch (s->state) {
2536
2537                         case SERVICE_START_POST:
2538                         case SERVICE_RELOAD:
2539                         case SERVICE_STOP:
2540                                 /* Need to wait until the operation is
2541                                  * done */
2542                                 break;
2543
2544                         case SERVICE_START:
2545                                 if (s->type == SERVICE_ONESHOT) {
2546                                         /* This was our main goal, so let's go on */
2547                                         if (success)
2548                                                 service_enter_start_post(s);
2549                                         else
2550                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2551                                         break;
2552                                 } else {
2553                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2554
2555                                         /* Fall through */
2556                                 }
2557
2558                         case SERVICE_RUNNING:
2559                                 service_enter_running(s, success);
2560                                 break;
2561
2562                         case SERVICE_STOP_SIGTERM:
2563                         case SERVICE_STOP_SIGKILL:
2564
2565                                 if (!control_pid_good(s))
2566                                         service_enter_stop_post(s, success);
2567
2568                                 /* If there is still a control process, wait for that first */
2569                                 break;
2570
2571                         default:
2572                                 assert_not_reached("Uh, main process died at wrong time.");
2573                         }
2574                 }
2575
2576         } else if (s->control_pid == pid) {
2577
2578                 s->control_pid = 0;
2579
2580                 if (s->control_command) {
2581                         exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2582
2583                         if (s->control_command->ignore)
2584                                 success = true;
2585                 }
2586
2587                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2588                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2589                 s->failure = s->failure || !success;
2590
2591                 if (s->control_command &&
2592                     s->control_command->command_next &&
2593                     success) {
2594
2595                         /* There is another command to *
2596                          * execute, so let's do that. */
2597
2598                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2599                         service_run_next_control(s, success);
2600
2601                 } else {
2602                         /* No further commands for this step, so let's
2603                          * figure out what to do next */
2604
2605                         s->control_command = NULL;
2606                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2607
2608                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2609
2610                         switch (s->state) {
2611
2612                         case SERVICE_START_PRE:
2613                                 if (success)
2614                                         service_enter_start(s);
2615                                 else
2616                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2617                                 break;
2618
2619                         case SERVICE_START:
2620                                 assert(s->type == SERVICE_FORKING);
2621
2622                                 /* Let's try to load the pid
2623                                  * file here if we can. We
2624                                  * ignore the return value,
2625                                  * since the PID file might
2626                                  * actually be created by a
2627                                  * START_POST script */
2628
2629                                 if (success) {
2630                                         service_load_pid_file(s);
2631                                         service_search_main_pid(s);
2632
2633                                         service_enter_start_post(s);
2634                                 } else
2635                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2636
2637                                 break;
2638
2639                         case SERVICE_START_POST:
2640                                 if (success && s->pid_file && !s->main_pid_known) {
2641                                         int r;
2642
2643                                         /* Hmm, let's see if we can
2644                                          * load the pid now after the
2645                                          * start-post scripts got
2646                                          * executed. */
2647
2648                                         if ((r = service_load_pid_file(s)) < 0)
2649                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2650                                 }
2651
2652                                 /* Fall through */
2653
2654                         case SERVICE_RELOAD:
2655                                 s->reload_failure = !success;
2656                                 service_enter_running(s, true);
2657                                 break;
2658
2659                         case SERVICE_STOP:
2660                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2661                                 break;
2662
2663                         case SERVICE_STOP_SIGTERM:
2664                         case SERVICE_STOP_SIGKILL:
2665                                 if (main_pid_good(s) <= 0)
2666                                         service_enter_stop_post(s, success);
2667
2668                                 /* If there is still a service
2669                                  * process around, wait until
2670                                  * that one quit, too */
2671                                 break;
2672
2673                         case SERVICE_STOP_POST:
2674                         case SERVICE_FINAL_SIGTERM:
2675                         case SERVICE_FINAL_SIGKILL:
2676                                 service_enter_dead(s, success, true);
2677                                 break;
2678
2679                         default:
2680                                 assert_not_reached("Uh, control process died at wrong time.");
2681                         }
2682                 }
2683         }
2684
2685         /* Notify clients about changed exit status */
2686         unit_add_to_dbus_queue(u);
2687 }
2688
2689 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2690         Service *s = SERVICE(u);
2691
2692         assert(s);
2693         assert(elapsed == 1);
2694
2695         assert(w == &s->timer_watch);
2696
2697         switch (s->state) {
2698
2699         case SERVICE_START_PRE:
2700         case SERVICE_START:
2701                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2702                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2703                 break;
2704
2705         case SERVICE_START_POST:
2706                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2707                 service_enter_stop(s, false);
2708                 break;
2709
2710         case SERVICE_RELOAD:
2711                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2712                 s->reload_failure = true;
2713                 service_enter_running(s, true);
2714                 break;
2715
2716         case SERVICE_STOP:
2717                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2718                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2719                 break;
2720
2721         case SERVICE_STOP_SIGTERM:
2722                 if (s->exec_context.send_sigkill) {
2723                         log_warning("%s stopping timed out. Killing.", u->meta.id);
2724                         service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2725                 } else {
2726                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2727                         service_enter_stop_post(s, false);
2728                 }
2729
2730                 break;
2731
2732         case SERVICE_STOP_SIGKILL:
2733                 /* Uh, wie sent a SIGKILL and it is still not gone?
2734                  * Must be something we cannot kill, so let's just be
2735                  * weirded out and continue */
2736
2737                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2738                 service_enter_stop_post(s, false);
2739                 break;
2740
2741         case SERVICE_STOP_POST:
2742                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2743                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2744                 break;
2745
2746         case SERVICE_FINAL_SIGTERM:
2747                 if (s->exec_context.send_sigkill) {
2748                         log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2749                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2750                 } else {
2751                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2752                         service_enter_dead(s, false, true);
2753                 }
2754
2755                 break;
2756
2757         case SERVICE_FINAL_SIGKILL:
2758                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2759                 service_enter_dead(s, false, true);
2760                 break;
2761
2762         case SERVICE_AUTO_RESTART:
2763                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2764                 service_enter_restart(s);
2765                 break;
2766
2767         default:
2768                 assert_not_reached("Timeout at wrong time.");
2769         }
2770 }
2771
2772 static void service_cgroup_notify_event(Unit *u) {
2773         Service *s = SERVICE(u);
2774
2775         assert(u);
2776
2777         log_debug("%s: cgroup is empty", u->meta.id);
2778
2779         switch (s->state) {
2780
2781                 /* Waiting for SIGCHLD is usually more interesting,
2782                  * because it includes return codes/signals. Which is
2783                  * why we ignore the cgroup events for most cases,
2784                  * except when we don't know pid which to expect the
2785                  * SIGCHLD for. */
2786
2787         case SERVICE_RUNNING:
2788                 service_enter_running(s, true);
2789                 break;
2790
2791         case SERVICE_STOP_SIGTERM:
2792         case SERVICE_STOP_SIGKILL:
2793                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2794                         service_enter_stop_post(s, true);
2795
2796                 break;
2797
2798         case SERVICE_FINAL_SIGTERM:
2799         case SERVICE_FINAL_SIGKILL:
2800                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2801                         service_enter_dead(s, true, true);
2802
2803                 break;
2804
2805         default:
2806                 ;
2807         }
2808 }
2809
2810 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2811         Service *s = SERVICE(u);
2812         const char *e;
2813
2814         assert(u);
2815
2816         if (s->notify_access == NOTIFY_NONE) {
2817                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2818                             u->meta.id, (unsigned long) pid);
2819                 return;
2820         }
2821
2822         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2823                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2824                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2825                 return;
2826         }
2827
2828         log_debug("%s: Got message", u->meta.id);
2829
2830         /* Interpret MAINPID= */
2831         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2832             (s->state == SERVICE_START ||
2833              s->state == SERVICE_START_POST ||
2834              s->state == SERVICE_RUNNING ||
2835              s->state == SERVICE_RELOAD)) {
2836
2837                 if (parse_pid(e + 8, &pid) < 0)
2838                         log_warning("Failed to parse notification message %s", e);
2839                 else {
2840                         log_debug("%s: got %s", u->meta.id, e);
2841                         service_set_main_pid(s, pid);
2842                 }
2843         }
2844
2845         /* Interpret READY= */
2846         if (s->type == SERVICE_NOTIFY &&
2847             s->state == SERVICE_START &&
2848             strv_find(tags, "READY=1")) {
2849                 log_debug("%s: got READY=1", u->meta.id);
2850
2851                 service_enter_start_post(s);
2852         }
2853
2854         /* Interpret STATUS= */
2855         if ((e = strv_find_prefix(tags, "STATUS="))) {
2856                 char *t;
2857
2858                 if (e[7]) {
2859                         if (!(t = strdup(e+7))) {
2860                                 log_error("Failed to allocate string.");
2861                                 return;
2862                         }
2863
2864                         log_debug("%s: got %s", u->meta.id, e);
2865
2866                         free(s->status_text);
2867                         s->status_text = t;
2868                 } else {
2869                         free(s->status_text);
2870                         s->status_text = NULL;
2871                 }
2872
2873         }
2874
2875         /* Notify clients about changed status or main pid */
2876         unit_add_to_dbus_queue(u);
2877 }
2878
2879 #ifdef HAVE_SYSV_COMPAT
2880 static int service_enumerate(Manager *m) {
2881         char **p;
2882         unsigned i;
2883         DIR *d = NULL;
2884         char *path = NULL, *fpath = NULL, *name = NULL;
2885         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2886         Unit *service;
2887         Iterator j;
2888         int r;
2889
2890         assert(m);
2891
2892         zero(runlevel_services);
2893
2894         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2895                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2896                         struct dirent *de;
2897
2898                         free(path);
2899                         path = NULL;
2900                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2901                                 r = -ENOMEM;
2902                                 goto finish;
2903                         }
2904
2905                         if (d)
2906                                 closedir(d);
2907
2908                         if (!(d = opendir(path))) {
2909                                 if (errno != ENOENT)
2910                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2911
2912                                 continue;
2913                         }
2914
2915                         while ((de = readdir(d))) {
2916                                 int a, b;
2917
2918                                 if (ignore_file(de->d_name))
2919                                         continue;
2920
2921                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2922                                         continue;
2923
2924                                 if (strlen(de->d_name) < 4)
2925                                         continue;
2926
2927                                 a = undecchar(de->d_name[1]);
2928                                 b = undecchar(de->d_name[2]);
2929
2930                                 if (a < 0 || b < 0)
2931                                         continue;
2932
2933                                 free(fpath);
2934                                 fpath = NULL;
2935                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2936                                         r = -ENOMEM;
2937                                         goto finish;
2938                                 }
2939
2940                                 if (access(fpath, X_OK) < 0) {
2941
2942                                         if (errno != ENOENT)
2943                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2944
2945                                         continue;
2946                                 }
2947
2948                                 free(name);
2949                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2950                                         r = -ENOMEM;
2951                                         goto finish;
2952                                 }
2953
2954                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2955                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2956                                         continue;
2957                                 }
2958
2959                                 if (de->d_name[0] == 'S')  {
2960
2961                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
2962                                                 SERVICE(service)->sysv_start_priority =
2963                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2964
2965                                                 SERVICE(service)->sysv_enabled = true;
2966                                         }
2967
2968                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
2969                                                 goto finish;
2970
2971                                         if ((r = set_put(runlevel_services[i], service)) < 0)
2972                                                 goto finish;
2973
2974                                 } else if (de->d_name[0] == 'K' &&
2975                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2976                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2977
2978                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
2979                                                 goto finish;
2980
2981                                         if ((r = set_put(shutdown_services, service)) < 0)
2982                                                 goto finish;
2983                                 }
2984                         }
2985                 }
2986
2987         /* Now we loaded all stubs and are aware of the lowest
2988         start-up priority for all services, not let's actually load
2989         the services, this will also tell us which services are
2990         actually native now */
2991         manager_dispatch_load_queue(m);
2992
2993         /* If this is a native service, rely on native ways to pull in
2994          * a service, don't pull it in via sysv rcN.d links. */
2995         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
2996                 SET_FOREACH(service, runlevel_services[i], j) {
2997                         service = unit_follow_merge(service);
2998
2999                         if (service->meta.fragment_path)
3000                                 continue;
3001
3002                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3003                                 goto finish;
3004                 }
3005
3006         /* We honour K links only for halt/reboot. For the normal
3007          * runlevels we assume the stop jobs will be implicitly added
3008          * by the core logic. Also, we don't really distuingish here
3009          * between the runlevels 0 and 6 and just add them to the
3010          * special shutdown target. On SUSE the boot.d/ runlevel is
3011          * also used for shutdown, so we add links for that too to the
3012          * shutdown target.*/
3013         SET_FOREACH(service, shutdown_services, j) {
3014                 service = unit_follow_merge(service);
3015
3016                 if (service->meta.fragment_path)
3017                         continue;
3018
3019                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3020                         goto finish;
3021         }
3022
3023         r = 0;
3024
3025 finish:
3026         free(path);
3027         free(fpath);
3028         free(name);
3029
3030         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3031                 set_free(runlevel_services[i]);
3032         set_free(shutdown_services);
3033
3034         if (d)
3035                 closedir(d);
3036
3037         return r;
3038 }
3039 #endif
3040
3041 static void service_bus_name_owner_change(
3042                 Unit *u,
3043                 const char *name,
3044                 const char *old_owner,
3045                 const char *new_owner) {
3046
3047         Service *s = SERVICE(u);
3048
3049         assert(s);
3050         assert(name);
3051
3052         assert(streq(s->bus_name, name));
3053         assert(old_owner || new_owner);
3054
3055         if (old_owner && new_owner)
3056                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3057         else if (old_owner)
3058                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3059         else
3060                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3061
3062         s->bus_name_good = !!new_owner;
3063
3064         if (s->type == SERVICE_DBUS) {
3065
3066                 /* service_enter_running() will figure out what to
3067                  * do */
3068                 if (s->state == SERVICE_RUNNING)
3069                         service_enter_running(s, true);
3070                 else if (s->state == SERVICE_START && new_owner)
3071                         service_enter_start_post(s);
3072
3073         } else if (new_owner &&
3074                    s->main_pid <= 0 &&
3075                    (s->state == SERVICE_START ||
3076                     s->state == SERVICE_START_POST ||
3077                     s->state == SERVICE_RUNNING ||
3078                     s->state == SERVICE_RELOAD)) {
3079
3080                 /* Try to acquire PID from bus service */
3081                 log_debug("Trying to acquire PID from D-Bus name...");
3082
3083                 bus_query_pid(u->meta.manager, name);
3084         }
3085 }
3086
3087 static void service_bus_query_pid_done(
3088                 Unit *u,
3089                 const char *name,
3090                 pid_t pid) {
3091
3092         Service *s = SERVICE(u);
3093
3094         assert(s);
3095         assert(name);
3096
3097         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3098
3099         if (s->main_pid <= 0 &&
3100             (s->state == SERVICE_START ||
3101              s->state == SERVICE_START_POST ||
3102              s->state == SERVICE_RUNNING ||
3103              s->state == SERVICE_RELOAD))
3104                 service_set_main_pid(s, pid);
3105 }
3106
3107 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3108         assert(s);
3109         assert(fd >= 0);
3110
3111         /* This is called by the socket code when instantiating a new
3112          * service for a stream socket and the socket needs to be
3113          * configured. */
3114
3115         if (s->meta.load_state != UNIT_LOADED)
3116                 return -EINVAL;
3117
3118         if (s->socket_fd >= 0)
3119                 return -EBUSY;
3120
3121         if (s->state != SERVICE_DEAD)
3122                 return -EAGAIN;
3123
3124         s->socket_fd = fd;
3125         s->got_socket_fd = true;
3126         s->accept_socket = sock;
3127
3128         return 0;
3129 }
3130
3131 static void service_reset_failed(Unit *u) {
3132         Service *s = SERVICE(u);
3133
3134         assert(s);
3135
3136         if (s->state == SERVICE_FAILED)
3137                 service_set_state(s, SERVICE_DEAD);
3138
3139         s->failure = false;
3140 }
3141
3142 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3143         Service *s = SERVICE(u);
3144         int r = 0;
3145         Set *pid_set = NULL;
3146
3147         assert(s);
3148
3149         if (s->main_pid <= 0 && who == KILL_MAIN) {
3150                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3151                 return -EINVAL;
3152         }
3153
3154         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3155                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3156                 return -ENOENT;
3157         }
3158
3159         if (s->control_pid > 0)
3160                 if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0)
3161                         r = -errno;
3162
3163         if (s->main_pid > 0)
3164                 if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0)
3165                         r = -errno;
3166
3167         if (mode == KILL_CONTROL_GROUP) {
3168                 int q;
3169
3170                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3171                         return -ENOMEM;
3172
3173                 /* Exclude the control/main pid from being killed via the cgroup */
3174                 if (s->control_pid > 0)
3175                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3176                                 r = q;
3177                                 goto finish;
3178                         }
3179
3180                 if (s->main_pid > 0)
3181                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3182                                 r = q;
3183                                 goto finish;
3184                         }
3185
3186                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, pid_set)) < 0)
3187                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3188                                 r = q;
3189         }
3190
3191 finish:
3192         if (pid_set)
3193                 set_free(pid_set);
3194
3195         return r;
3196 }
3197
3198 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3199         [SERVICE_DEAD] = "dead",
3200         [SERVICE_START_PRE] = "start-pre",
3201         [SERVICE_START] = "start",
3202         [SERVICE_START_POST] = "start-post",
3203         [SERVICE_RUNNING] = "running",
3204         [SERVICE_EXITED] = "exited",
3205         [SERVICE_RELOAD] = "reload",
3206         [SERVICE_STOP] = "stop",
3207         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3208         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3209         [SERVICE_STOP_POST] = "stop-post",
3210         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3211         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3212         [SERVICE_FAILED] = "failed",
3213         [SERVICE_AUTO_RESTART] = "auto-restart",
3214 };
3215
3216 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3217
3218 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3219         [SERVICE_RESTART_NO] = "no",
3220         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3221         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3222         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3223         [SERVICE_RESTART_ALWAYS] = "always"
3224 };
3225
3226 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3227
3228 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3229         [SERVICE_SIMPLE] = "simple",
3230         [SERVICE_FORKING] = "forking",
3231         [SERVICE_ONESHOT] = "oneshot",
3232         [SERVICE_DBUS] = "dbus",
3233         [SERVICE_NOTIFY] = "notify"
3234 };
3235
3236 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3237
3238 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3239         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3240         [SERVICE_EXEC_START] = "ExecStart",
3241         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3242         [SERVICE_EXEC_RELOAD] = "ExecReload",
3243         [SERVICE_EXEC_STOP] = "ExecStop",
3244         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3245 };
3246
3247 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3248
3249 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3250         [NOTIFY_NONE] = "none",
3251         [NOTIFY_MAIN] = "main",
3252         [NOTIFY_ALL] = "all"
3253 };
3254
3255 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3256
3257 const UnitVTable service_vtable = {
3258         .suffix = ".service",
3259         .show_status = true,
3260
3261         .init = service_init,
3262         .done = service_done,
3263         .load = service_load,
3264
3265         .coldplug = service_coldplug,
3266
3267         .dump = service_dump,
3268
3269         .start = service_start,
3270         .stop = service_stop,
3271         .reload = service_reload,
3272
3273         .can_reload = service_can_reload,
3274
3275         .kill = service_kill,
3276
3277         .serialize = service_serialize,
3278         .deserialize_item = service_deserialize_item,
3279
3280         .active_state = service_active_state,
3281         .sub_state_to_string = service_sub_state_to_string,
3282
3283 #ifdef HAVE_SYSV_COMPAT
3284         .check_gc = service_check_gc,
3285 #endif
3286         .check_snapshot = service_check_snapshot,
3287
3288         .sigchld_event = service_sigchld_event,
3289         .timer_event = service_timer_event,
3290
3291         .reset_failed = service_reset_failed,
3292
3293         .cgroup_notify_empty = service_cgroup_notify_event,
3294         .notify_message = service_notify_message,
3295
3296         .bus_name_owner_change = service_bus_name_owner_change,
3297         .bus_query_pid_done = service_bus_query_pid_done,
3298
3299         .bus_interface = "org.freedesktop.systemd1.Service",
3300         .bus_message_handler = bus_service_message_handler,
3301         .bus_invalidating_properties =  bus_service_invalidating_properties,
3302
3303 #ifdef HAVE_SYSV_COMPAT
3304         .enumerate = service_enumerate
3305 #endif
3306 };