src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35 #include "special.h"
  36 #include "bus-errors.h"
  37 #include "exit-status.h"
  38
  39 #define COMMENTS "#;\n"
  40 #define NEWLINES "\n\r"
  41
  42 #ifdef HAVE_SYSV_COMPAT
  43
  44 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
  45
  46 typedef enum RunlevelType {
  47         RUNLEVEL_UP,
  48         RUNLEVEL_DOWN,
  49         RUNLEVEL_SYSINIT
  50 } RunlevelType;
  51
  52 static const struct {
  53         const char *path;
  54         const char *target;
  55         const RunlevelType type;
  56 } rcnd_table[] = {
  57         /* Standard SysV runlevels for start-up */
  58         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  59         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  60         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  61         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  62         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  63
  64 #ifdef TARGET_SUSE
  65         /* SUSE style boot.d */
  66         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  67 #endif
  68
  69 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_FRUGALWARE)
  70         /* Debian style rcS.d */
  71         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  72 #endif
  73
  74         /* Standard SysV runlevels for shutdown */
  75         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  76         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  77
  78         /* Note that the order here matters, as we read the
  79            directories in this order, and we want to make sure that
  80            sysv_start_priority is known when we first load the
  81            unit. And that value we only know from S links. Hence
  82            UP/SYSINIT must be read before DOWN */
  83 };
  84
  85 #define RUNLEVELS_UP "12345"
  86 /* #define RUNLEVELS_DOWN "06" */
  87 /* #define RUNLEVELS_BOOT "bBsS" */
  88 #endif
  89
  90 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  91         [SERVICE_DEAD] = UNIT_INACTIVE,
  92         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  93         [SERVICE_START] = UNIT_ACTIVATING,
  94         [SERVICE_START_POST] = UNIT_ACTIVATING,
  95         [SERVICE_RUNNING] = UNIT_ACTIVE,
  96         [SERVICE_EXITED] = UNIT_ACTIVE,
  97         [SERVICE_RELOAD] = UNIT_RELOADING,
  98         [SERVICE_STOP] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 101         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 103         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 104         [SERVICE_FAILED] = UNIT_FAILED,
 105         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 106 };
 107
 108 static void service_init(Unit *u) {
 109         Service *s = SERVICE(u);
 110
 111         assert(u);
 112         assert(u->meta.load_state == UNIT_STUB);
 113
 114         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 115         s->restart_usec = DEFAULT_RESTART_USEC;
 116         s->timer_watch.type = WATCH_INVALID;
 117 #ifdef HAVE_SYSV_COMPAT
 118         s->sysv_start_priority = -1;
 119 #endif
 120         s->socket_fd = -1;
 121         s->guess_main_pid = true;
 122
 123         exec_context_init(&s->exec_context);
 124         s->exec_context.std_output = u->meta.manager->default_std_output;
 125         s->exec_context.std_error = u->meta.manager->default_std_error;
 126
 127         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 128
 129         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 130 }
 131
 132 static void service_unwatch_control_pid(Service *s) {
 133         assert(s);
 134
 135         if (s->control_pid <= 0)
 136                 return;
 137
 138         unit_unwatch_pid(UNIT(s), s->control_pid);
 139         s->control_pid = 0;
 140 }
 141
 142 static void service_unwatch_main_pid(Service *s) {
 143         assert(s);
 144
 145         if (s->main_pid <= 0)
 146                 return;
 147
 148         unit_unwatch_pid(UNIT(s), s->main_pid);
 149         s->main_pid = 0;
 150 }
 151
 152 static int service_set_main_pid(Service *s, pid_t pid) {
 153         pid_t ppid;
 154
 155         assert(s);
 156
 157         if (pid <= 1)
 158                 return -EINVAL;
 159
 160         if (pid == getpid())
 161                 return -EINVAL;
 162
 163         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 164                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 165                             s->meta.id, (unsigned long) pid);
 166
 167         s->main_pid = pid;
 168         s->main_pid_known = true;
 169
 170         exec_status_start(&s->main_exec_status, pid);
 171
 172         return 0;
 173 }
 174
 175 static void service_close_socket_fd(Service *s) {
 176         assert(s);
 177
 178         if (s->socket_fd < 0)
 179                 return;
 180
 181         close_nointr_nofail(s->socket_fd);
 182         s->socket_fd = -1;
 183 }
 184
 185 static void service_connection_unref(Service *s) {
 186         assert(s);
 187
 188         if (!s->accept_socket)
 189                 return;
 190
 191         socket_connection_unref(s->accept_socket);
 192         s->accept_socket = NULL;
 193 }
 194
 195 static void service_done(Unit *u) {
 196         Service *s = SERVICE(u);
 197
 198         assert(s);
 199
 200         free(s->pid_file);
 201         s->pid_file = NULL;
 202
 203 #ifdef HAVE_SYSV_COMPAT
 204         free(s->sysv_path);
 205         s->sysv_path = NULL;
 206
 207         free(s->sysv_runlevels);
 208         s->sysv_runlevels = NULL;
 209 #endif
 210
 211         free(s->status_text);
 212         s->status_text = NULL;
 213
 214         exec_context_done(&s->exec_context);
 215         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 216         s->control_command = NULL;
 217         s->main_command = NULL;
 218
 219         /* This will leak a process, but at least no memory or any of
 220          * our resources */
 221         service_unwatch_main_pid(s);
 222         service_unwatch_control_pid(s);
 223
 224         if (s->bus_name)  {
 225                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 226                 free(s->bus_name);
 227                 s->bus_name = NULL;
 228         }
 229
 230         service_close_socket_fd(s);
 231         service_connection_unref(s);
 232
 233         set_free(s->configured_sockets);
 234
 235         unit_unwatch_timer(u, &s->timer_watch);
 236 }
 237
 238 #ifdef HAVE_SYSV_COMPAT
 239 static char *sysv_translate_name(const char *name) {
 240         char *r;
 241
 242         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 243                 return NULL;
 244
 245 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 246         if (endswith(name, ".sh"))
 247                 /* Drop Debian-style .sh suffix */
 248                 strcpy(stpcpy(r, name) - 3, ".service");
 249 #endif
 250 #ifdef TARGET_SUSE
 251         if (startswith(name, "boot."))
 252                 /* Drop SuSE-style boot. prefix */
 253                 strcpy(stpcpy(r, name + 5), ".service");
 254 #endif
 255 #ifdef TARGET_FRUGALWARE
 256         if (startswith(name, "rc."))
 257                 /* Drop Frugalware-style rc. prefix */
 258                 strcpy(stpcpy(r, name + 3), ".service");
 259 #endif
 260         else
 261                 /* Normal init scripts */
 262                 strcpy(stpcpy(r, name), ".service");
 263
 264         return r;
 265 }
 266
 267 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 268
 269         /* We silently ignore the $ prefix here. According to the LSB
 270          * spec it simply indicates whether something is a
 271          * standardized name or a distribution-specific one. Since we
 272          * just follow what already exists and do not introduce new
 273          * uses or names we don't care who introduced a new name. */
 274
 275         static const char * const table[] = {
 276                 /* LSB defined facilities */
 277                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 278                 "network",              SPECIAL_NETWORK_TARGET,
 279                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 280                 "portmap",              SPECIAL_RPCBIND_TARGET,
 281                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 282                 "syslog",               SPECIAL_SYSLOG_TARGET,
 283                 "time",                 SPECIAL_RTC_SET_TARGET,
 284
 285                 /* common extensions */
 286                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 287                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 288                 "null",                 NULL,
 289
 290 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 291                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 292 #endif
 293
 294 #ifdef TARGET_FEDORA
 295                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 296                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 297                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 298 #endif
 299
 300 #ifdef TARGET_SUSE
 301                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 302 #endif
 303         };
 304
 305         unsigned i;
 306         char *r;
 307         const char *n;
 308
 309         assert(name);
 310         assert(_r);
 311
 312         n = *name == '$' ? name + 1 : name;
 313
 314         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 315
 316                 if (!streq(table[i], n))
 317                         continue;
 318
 319                 if (!table[i+1])
 320                         return 0;
 321
 322                 if (!(r = strdup(table[i+1])))
 323                         return -ENOMEM;
 324
 325                 goto finish;
 326         }
 327
 328         /* If we don't know this name, fallback heuristics to figure
 329          * out whether something is a target or a service alias. */
 330
 331         if (*name == '$') {
 332                 if (!unit_prefix_is_valid(n))
 333                         return -EINVAL;
 334
 335                 /* Facilities starting with $ are most likely targets */
 336                 r = unit_name_build(n, NULL, ".target");
 337         } else if (filename && streq(name, filename))
 338                 /* Names equaling the file name of the services are redundant */
 339                 return 0;
 340         else
 341                 /* Everything else we assume to be normal service names */
 342                 r = sysv_translate_name(n);
 343
 344         if (!r)
 345                 return -ENOMEM;
 346
 347 finish:
 348
 349         if (_r)
 350                 *_r = r;
 351
 352         return 1;
 353 }
 354
 355 static int sysv_fix_order(Service *s) {
 356         Meta *other;
 357         int r;
 358
 359         assert(s);
 360
 361         if (s->sysv_start_priority < 0)
 362                 return 0;
 363
 364         /* For each pair of services where at least one lacks a LSB
 365          * header, we use the start priority value to order things. */
 366
 367         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 368                 Service *t;
 369                 UnitDependency d;
 370                 bool special_s, special_t;
 371
 372                 t = (Service*) other;
 373
 374                 if (s == t)
 375                         continue;
 376
 377                 if (t->meta.load_state != UNIT_LOADED)
 378                         continue;
 379
 380                 if (t->sysv_start_priority < 0)
 381                         continue;
 382
 383                 /* If both units have modern headers we don't care
 384                  * about the priorities */
 385                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 386                     (t->meta.fragment_path || t->sysv_has_lsb))
 387                         continue;
 388
 389                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 390                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 391
 392                 if (special_t && !special_s)
 393                         d = UNIT_AFTER;
 394                 else if (special_s && !special_t)
 395                         d = UNIT_BEFORE;
 396                 else if (t->sysv_start_priority < s->sysv_start_priority)
 397                         d = UNIT_AFTER;
 398                 else if (t->sysv_start_priority > s->sysv_start_priority)
 399                         d = UNIT_BEFORE;
 400                 else
 401                         continue;
 402
 403                 /* FIXME: Maybe we should compare the name here lexicographically? */
 404
 405                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 406                         return r;
 407         }
 408
 409         return 0;
 410 }
 411
 412 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 413         ExecCommand *c;
 414
 415         if (!(c = new0(ExecCommand, 1)))
 416                 return NULL;
 417
 418         if (!(c->path = strdup(path))) {
 419                 free(c);
 420                 return NULL;
 421         }
 422
 423         if (!(c->argv = strv_new(path, arg1, NULL))) {
 424                 free(c->path);
 425                 free(c);
 426                 return NULL;
 427         }
 428
 429         return c;
 430 }
 431
 432 static int sysv_exec_commands(Service *s) {
 433         ExecCommand *c;
 434
 435         assert(s);
 436         assert(s->sysv_path);
 437
 438         if (!(c = exec_command_new(s->sysv_path, "start")))
 439                 return -ENOMEM;
 440         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 441
 442         if (!(c = exec_command_new(s->sysv_path, "stop")))
 443                 return -ENOMEM;
 444         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 445
 446         if (!(c = exec_command_new(s->sysv_path, "reload")))
 447                 return -ENOMEM;
 448         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 449
 450         return 0;
 451 }
 452
 453 static int service_load_sysv_path(Service *s, const char *path) {
 454         FILE *f;
 455         Unit *u;
 456         unsigned line = 0;
 457         int r;
 458         enum {
 459                 NORMAL,
 460                 DESCRIPTION,
 461                 LSB,
 462                 LSB_DESCRIPTION
 463         } state = NORMAL;
 464         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 465
 466         assert(s);
 467         assert(path);
 468
 469         u = UNIT(s);
 470
 471         if (!(f = fopen(path, "re"))) {
 472                 r = errno == ENOENT ? 0 : -errno;
 473                 goto finish;
 474         }
 475
 476         free(s->sysv_path);
 477         if (!(s->sysv_path = strdup(path))) {
 478                 r = -ENOMEM;
 479                 goto finish;
 480         }
 481
 482         while (!feof(f)) {
 483                 char l[LINE_MAX], *t;
 484
 485                 if (!fgets(l, sizeof(l), f)) {
 486                         if (feof(f))
 487                                 break;
 488
 489                         r = -errno;
 490                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 491                         goto finish;
 492                 }
 493
 494                 line++;
 495
 496                 t = strstrip(l);
 497                 if (*t != '#')
 498                         continue;
 499
 500                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 501                         state = LSB;
 502                         s->sysv_has_lsb = true;
 503                         continue;
 504                 }
 505
 506                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 507                         state = NORMAL;
 508                         continue;
 509                 }
 510
 511                 t++;
 512                 t += strspn(t, WHITESPACE);
 513
 514                 if (state == NORMAL) {
 515
 516                         /* Try to parse Red Hat style chkconfig headers */
 517
 518                         if (startswith_no_case(t, "chkconfig:")) {
 519                                 int start_priority;
 520                                 char runlevels[16], *k;
 521
 522                                 state = NORMAL;
 523
 524                                 if (sscanf(t+10, "%15s %i %*i",
 525                                            runlevels,
 526                                            &start_priority) != 2) {
 527
 528                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 529                                         continue;
 530                                 }
 531
 532                                 /* A start priority gathered from the
 533                                  * symlink farms is preferred over the
 534                                  * data from the LSB header. */
 535                                 if (start_priority < 0 || start_priority > 99)
 536                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 537                                 else if (s->sysv_start_priority < 0)
 538                                         s->sysv_start_priority = start_priority;
 539
 540                                 char_array_0(runlevels);
 541                                 k = delete_chars(runlevels, WHITESPACE "-");
 542
 543                                 if (k[0]) {
 544                                         char *d;
 545
 546                                         if (!(d = strdup(k))) {
 547                                                 r = -ENOMEM;
 548                                                 goto finish;
 549                                         }
 550
 551                                         free(s->sysv_runlevels);
 552                                         s->sysv_runlevels = d;
 553                                 }
 554
 555                         } else if (startswith_no_case(t, "description:")) {
 556
 557                                 size_t k = strlen(t);
 558                                 char *d;
 559                                 const char *j;
 560
 561                                 if (t[k-1] == '\\') {
 562                                         state = DESCRIPTION;
 563                                         t[k-1] = 0;
 564                                 }
 565
 566                                 if ((j = strstrip(t+12)) && *j) {
 567                                         if (!(d = strdup(j))) {
 568                                                 r = -ENOMEM;
 569                                                 goto finish;
 570                                         }
 571                                 } else
 572                                         d = NULL;
 573
 574                                 free(chkconfig_description);
 575                                 chkconfig_description = d;
 576
 577                         } else if (startswith_no_case(t, "pidfile:")) {
 578
 579                                 char *fn;
 580
 581                                 state = NORMAL;
 582
 583                                 fn = strstrip(t+8);
 584                                 if (!path_is_absolute(fn)) {
 585                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 586                                         continue;
 587                                 }
 588
 589                                 if (!(fn = strdup(fn))) {
 590                                         r = -ENOMEM;
 591                                         goto finish;
 592                                 }
 593
 594                                 free(s->pid_file);
 595                                 s->pid_file = fn;
 596                         }
 597
 598                 } else if (state == DESCRIPTION) {
 599
 600                         /* Try to parse Red Hat style description
 601                          * continuation */
 602
 603                         size_t k = strlen(t);
 604                         char *j;
 605
 606                         if (t[k-1] == '\\')
 607                                 t[k-1] = 0;
 608                         else
 609                                 state = NORMAL;
 610
 611                         if ((j = strstrip(t)) && *j) {
 612                                 char *d = NULL;
 613
 614                                 if (chkconfig_description)
 615                                         asprintf(&d, "%s %s", chkconfig_description, j);
 616                                 else
 617                                         d = strdup(j);
 618
 619                                 if (!d) {
 620                                         r = -ENOMEM;
 621                                         goto finish;
 622                                 }
 623
 624                                 free(chkconfig_description);
 625                                 chkconfig_description = d;
 626                         }
 627
 628                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 629
 630                         if (startswith_no_case(t, "Provides:")) {
 631                                 char *i, *w;
 632                                 size_t z;
 633
 634                                 state = LSB;
 635
 636                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 637                                         char *n, *m;
 638
 639                                         if (!(n = strndup(w, z))) {
 640                                                 r = -ENOMEM;
 641                                                 goto finish;
 642                                         }
 643
 644                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 645                                         free(n);
 646
 647                                         if (r < 0)
 648                                                 goto finish;
 649
 650                                         if (r == 0)
 651                                                 continue;
 652
 653                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 654                                                 r = unit_add_name(u, m);
 655                                         else {
 656                                                 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 657
 658                                                 if (s->sysv_enabled) {
 659                                                         int k;
 660
 661                                                         if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
 662                                                                 r = k;
 663                                                 }
 664                                         }
 665
 666                                         if (r < 0)
 667                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 668
 669                                         free(m);
 670                                 }
 671
 672                         } else if (startswith_no_case(t, "Required-Start:") ||
 673                                    startswith_no_case(t, "Should-Start:") ||
 674                                    startswith_no_case(t, "X-Start-Before:") ||
 675                                    startswith_no_case(t, "X-Start-After:")) {
 676                                 char *i, *w;
 677                                 size_t z;
 678
 679                                 state = LSB;
 680
 681                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 682                                         char *n, *m;
 683
 684                                         if (!(n = strndup(w, z))) {
 685                                                 r = -ENOMEM;
 686                                                 goto finish;
 687                                         }
 688
 689                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 690
 691                                         if (r < 0) {
 692                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
 693                                                 free(n);
 694                                                 continue;
 695                                         }
 696
 697                                         free(n);
 698
 699                                         if (r == 0)
 700                                                 continue;
 701
 702                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 703
 704                                         if (r < 0)
 705                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 706
 707                                         free(m);
 708                                 }
 709                         } else if (startswith_no_case(t, "Default-Start:")) {
 710                                 char *k, *d;
 711
 712                                 state = LSB;
 713
 714                                 k = delete_chars(t+14, WHITESPACE "-");
 715
 716                                 if (k[0] != 0) {
 717                                         if (!(d = strdup(k))) {
 718                                                 r = -ENOMEM;
 719                                                 goto finish;
 720                                         }
 721
 722                                         free(s->sysv_runlevels);
 723                                         s->sysv_runlevels = d;
 724                                 }
 725
 726                         } else if (startswith_no_case(t, "Description:")) {
 727                                 char *d, *j;
 728
 729                                 state = LSB_DESCRIPTION;
 730
 731                                 if ((j = strstrip(t+12)) && *j) {
 732                                         if (!(d = strdup(j))) {
 733                                                 r = -ENOMEM;
 734                                                 goto finish;
 735                                         }
 736                                 } else
 737                                         d = NULL;
 738
 739                                 free(long_description);
 740                                 long_description = d;
 741
 742                         } else if (startswith_no_case(t, "Short-Description:")) {
 743                                 char *d, *j;
 744
 745                                 state = LSB;
 746
 747                                 if ((j = strstrip(t+18)) && *j) {
 748                                         if (!(d = strdup(j))) {
 749                                                 r = -ENOMEM;
 750                                                 goto finish;
 751                                         }
 752                                 } else
 753                                         d = NULL;
 754
 755                                 free(short_description);
 756                                 short_description = d;
 757
 758                         } else if (startswith_no_case(t, "X-Interactive:")) {
 759                                 int b;
 760
 761                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 762                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 763                                         continue;
 764                                 }
 765
 766                                 if (b)
 767                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 768                                 else
 769                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 770
 771                         } else if (state == LSB_DESCRIPTION) {
 772
 773                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 774                                         char *j;
 775
 776                                         if ((j = strstrip(t)) && *j) {
 777                                                 char *d = NULL;
 778
 779                                                 if (long_description)
 780                                                         asprintf(&d, "%s %s", long_description, t);
 781                                                 else
 782                                                         d = strdup(j);
 783
 784                                                 if (!d) {
 785                                                         r = -ENOMEM;
 786                                                         goto finish;
 787                                                 }
 788
 789                                                 free(long_description);
 790                                                 long_description = d;
 791                                         }
 792
 793                                 } else
 794                                         state = LSB;
 795                         }
 796                 }
 797         }
 798
 799         if ((r = sysv_exec_commands(s)) < 0)
 800                 goto finish;
 801
 802         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 803                 /* If there a runlevels configured for this service
 804                  * but none of the standard ones, then we assume this
 805                  * is some special kind of service (which might be
 806                  * needed for early boot) and don't create any links
 807                  * to it. */
 808
 809                 s->meta.default_dependencies = false;
 810
 811                 /* Don't timeout special services during boot (like fsck) */
 812                 s->timeout_usec = 0;
 813         } else
 814                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 815
 816         /* Special setting for all SysV services */
 817         s->type = SERVICE_FORKING;
 818         s->remain_after_exit = true;
 819         s->restart = SERVICE_RESTART_NO;
 820         s->exec_context.std_output =
 821                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 822                 ? EXEC_OUTPUT_TTY : s->meta.manager->default_std_output;
 823         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 824
 825         /* We use the long description only if
 826          * no short description is set. */
 827
 828         if (short_description)
 829                 description = short_description;
 830         else if (chkconfig_description)
 831                 description = chkconfig_description;
 832         else if (long_description)
 833                 description = long_description;
 834         else
 835                 description = NULL;
 836
 837         if (description) {
 838                 char *d;
 839
 840                 if (!(d = strappend("LSB: ", description))) {
 841                         r = -ENOMEM;
 842                         goto finish;
 843                 }
 844
 845                 u->meta.description = d;
 846         }
 847
 848         u->meta.load_state = UNIT_LOADED;
 849         r = 0;
 850
 851 finish:
 852
 853         if (f)
 854                 fclose(f);
 855
 856         free(short_description);
 857         free(long_description);
 858         free(chkconfig_description);
 859
 860         return r;
 861 }
 862
 863 static int service_load_sysv_name(Service *s, const char *name) {
 864         char **p;
 865
 866         assert(s);
 867         assert(name);
 868
 869         /* For SysV services we strip the boot.*, rc.* and *.sh
 870          * prefixes/suffixes. */
 871 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 872         if (endswith(name, ".sh.service"))
 873                 return -ENOENT;
 874 #endif
 875
 876 #ifdef TARGET_SUSE
 877         if (startswith(name, "boot."))
 878                 return -ENOENT;
 879 #endif
 880
 881 #ifdef TARGET_FRUGALWARE
 882         if (startswith(name, "rc."))
 883                 return -ENOENT;
 884 #endif
 885
 886         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 887                 char *path;
 888                 int r;
 889
 890                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 891                         return -ENOMEM;
 892
 893                 assert(endswith(path, ".service"));
 894                 path[strlen(path)-8] = 0;
 895
 896                 r = service_load_sysv_path(s, path);
 897
 898 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 899                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 900                         /* Try Debian style *.sh source'able init scripts */
 901                         strcat(path, ".sh");
 902                         r = service_load_sysv_path(s, path);
 903                 }
 904 #endif
 905                 free(path);
 906
 907 #ifdef TARGET_SUSE
 908                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 909                         /* Try SUSE style boot.* init scripts */
 910
 911                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 912                                 return -ENOMEM;
 913
 914                         /* Drop .service suffix */
 915                         path[strlen(path)-8] = 0;
 916                         r = service_load_sysv_path(s, path);
 917                         free(path);
 918                 }
 919 #endif
 920
 921 #ifdef TARGET_FRUGALWARE
 922                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 923                         /* Try Frugalware style rc.* init scripts */
 924
 925                         if (asprintf(&path, "%s/rc.%s", *p, name) < 0)
 926                                 return -ENOMEM;
 927
 928                         /* Drop .service suffix */
 929                         path[strlen(path)-8] = 0;
 930                         r = service_load_sysv_path(s, path);
 931                         free(path);
 932                 }
 933 #endif
 934
 935                 if (r < 0)
 936                         return r;
 937
 938                 if ((s->meta.load_state != UNIT_STUB))
 939                         break;
 940         }
 941
 942         return 0;
 943 }
 944
 945 static int service_load_sysv(Service *s) {
 946         const char *t;
 947         Iterator i;
 948         int r;
 949
 950         assert(s);
 951
 952         /* Load service data from SysV init scripts, preferably with
 953          * LSB headers ... */
 954
 955         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 956                 return 0;
 957
 958         if ((t = s->meta.id))
 959                 if ((r = service_load_sysv_name(s, t)) < 0)
 960                         return r;
 961
 962         if (s->meta.load_state == UNIT_STUB)
 963                 SET_FOREACH(t, s->meta.names, i) {
 964                         if (t == s->meta.id)
 965                                 continue;
 966
 967                         if ((r = service_load_sysv_name(s, t)) < 0)
 968                                 return r;
 969
 970                         if (s->meta.load_state != UNIT_STUB)
 971                                 break;
 972                 }
 973
 974         return 0;
 975 }
 976 #endif
 977
 978 static int fsck_fix_order(Service *s) {
 979         Meta *other;
 980         int r;
 981
 982         assert(s);
 983
 984         if (s->fsck_passno <= 0)
 985                 return 0;
 986
 987         /* For each pair of services where both have an fsck priority
 988          * we order things based on it. */
 989
 990         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 991                 Service *t;
 992                 UnitDependency d;
 993
 994                 t = (Service*) other;
 995
 996                 if (s == t)
 997                         continue;
 998
 999                 if (t->meta.load_state != UNIT_LOADED)
1000                         continue;
1001
1002                 if (t->fsck_passno <= 0)
1003                         continue;
1004
1005                 if (t->fsck_passno < s->fsck_passno)
1006                         d = UNIT_AFTER;
1007                 else if (t->fsck_passno > s->fsck_passno)
1008                         d = UNIT_BEFORE;
1009                 else
1010                         continue;
1011
1012                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1013                         return r;
1014         }
1015
1016         return 0;
1017 }
1018
1019 static int service_verify(Service *s) {
1020         assert(s);
1021
1022         if (s->meta.load_state != UNIT_LOADED)
1023                 return 0;
1024
1025         if (!s->exec_command[SERVICE_EXEC_START]) {
1026                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1027                 return -EINVAL;
1028         }
1029
1030         if (s->type != SERVICE_ONESHOT &&
1031             s->exec_command[SERVICE_EXEC_START]->command_next) {
1032                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1033                 return -EINVAL;
1034         }
1035
1036         if (s->type == SERVICE_ONESHOT &&
1037             s->exec_command[SERVICE_EXEC_RELOAD]) {
1038                 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", s->meta.id);
1039                 return -EINVAL;
1040         }
1041
1042         if (s->type == SERVICE_DBUS && !s->bus_name) {
1043                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1044                 return -EINVAL;
1045         }
1046
1047         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1048                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1049                 return -EINVAL;
1050         }
1051
1052         return 0;
1053 }
1054
1055 static int service_add_default_dependencies(Service *s) {
1056         int r;
1057
1058         assert(s);
1059
1060         /* Add a number of automatic dependencies useful for the
1061          * majority of services. */
1062
1063         /* First, pull in base system */
1064         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1065
1066                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1067                         return r;
1068
1069         } else if (s->meta.manager->running_as == MANAGER_USER) {
1070
1071                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1072                         return r;
1073         }
1074
1075         /* Second, activate normal shutdown */
1076         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1077 }
1078
1079 static int service_load(Unit *u) {
1080         int r;
1081         Service *s = SERVICE(u);
1082
1083         assert(s);
1084
1085         /* Load a .service file */
1086         if ((r = unit_load_fragment(u)) < 0)
1087                 return r;
1088
1089 #ifdef HAVE_SYSV_COMPAT
1090         /* Load a classic init script as a fallback, if we couldn't find anything */
1091         if (u->meta.load_state == UNIT_STUB)
1092                 if ((r = service_load_sysv(s)) < 0)
1093                         return r;
1094 #endif
1095
1096         /* Still nothing found? Then let's give up */
1097         if (u->meta.load_state == UNIT_STUB)
1098                 return -ENOENT;
1099
1100         /* We were able to load something, then let's add in the
1101          * dropin directories. */
1102         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1103                 return r;
1104
1105         /* This is a new unit? Then let's add in some extras */
1106         if (u->meta.load_state == UNIT_LOADED) {
1107                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1108                         return r;
1109
1110                 if ((r = unit_add_default_cgroups(u)) < 0)
1111                         return r;
1112
1113 #ifdef HAVE_SYSV_COMPAT
1114                 if ((r = sysv_fix_order(s)) < 0)
1115                         return r;
1116 #endif
1117
1118                 if ((r = fsck_fix_order(s)) < 0)
1119                         return r;
1120
1121                 if (s->bus_name)
1122                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1123                                 return r;
1124
1125                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1126                         s->notify_access = NOTIFY_MAIN;
1127
1128                 if (s->type == SERVICE_DBUS || s->bus_name)
1129                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1130                                 return r;
1131
1132                 if (s->meta.default_dependencies)
1133                         if ((r = service_add_default_dependencies(s)) < 0)
1134                                 return r;
1135         }
1136
1137         return service_verify(s);
1138 }
1139
1140 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1141
1142         ServiceExecCommand c;
1143         Service *s = SERVICE(u);
1144         const char *prefix2;
1145         char *p2;
1146
1147         assert(s);
1148
1149         p2 = strappend(prefix, "\t");
1150         prefix2 = p2 ? p2 : prefix;
1151
1152         fprintf(f,
1153                 "%sService State: %s\n"
1154                 "%sPermissionsStartOnly: %s\n"
1155                 "%sRootDirectoryStartOnly: %s\n"
1156                 "%sRemainAfterExit: %s\n"
1157                 "%sGuessMainPID: %s\n"
1158                 "%sType: %s\n"
1159                 "%sRestart: %s\n"
1160                 "%sNotifyAccess: %s\n",
1161                 prefix, service_state_to_string(s->state),
1162                 prefix, yes_no(s->permissions_start_only),
1163                 prefix, yes_no(s->root_directory_start_only),
1164                 prefix, yes_no(s->remain_after_exit),
1165                 prefix, yes_no(s->guess_main_pid),
1166                 prefix, service_type_to_string(s->type),
1167                 prefix, service_restart_to_string(s->restart),
1168                 prefix, notify_access_to_string(s->notify_access));
1169
1170         if (s->control_pid > 0)
1171                 fprintf(f,
1172                         "%sControl PID: %lu\n",
1173                         prefix, (unsigned long) s->control_pid);
1174
1175         if (s->main_pid > 0)
1176                 fprintf(f,
1177                         "%sMain PID: %lu\n",
1178                         prefix, (unsigned long) s->main_pid);
1179
1180         if (s->pid_file)
1181                 fprintf(f,
1182                         "%sPIDFile: %s\n",
1183                         prefix, s->pid_file);
1184
1185         if (s->bus_name)
1186                 fprintf(f,
1187                         "%sBusName: %s\n"
1188                         "%sBus Name Good: %s\n",
1189                         prefix, s->bus_name,
1190                         prefix, yes_no(s->bus_name_good));
1191
1192         exec_context_dump(&s->exec_context, f, prefix);
1193
1194         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1195
1196                 if (!s->exec_command[c])
1197                         continue;
1198
1199                 fprintf(f, "%s-> %s:\n",
1200                         prefix, service_exec_command_to_string(c));
1201
1202                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1203         }
1204
1205 #ifdef HAVE_SYSV_COMPAT
1206         if (s->sysv_path)
1207                 fprintf(f,
1208                         "%sSysV Init Script Path: %s\n"
1209                         "%sSysV Init Script has LSB Header: %s\n"
1210                         "%sSysVEnabled: %s\n",
1211                         prefix, s->sysv_path,
1212                         prefix, yes_no(s->sysv_has_lsb),
1213                         prefix, yes_no(s->sysv_enabled));
1214
1215         if (s->sysv_start_priority >= 0)
1216                 fprintf(f,
1217                         "%sSysVStartPriority: %i\n",
1218                         prefix, s->sysv_start_priority);
1219
1220         if (s->sysv_runlevels)
1221                 fprintf(f, "%sSysVRunLevels: %s\n",
1222                         prefix, s->sysv_runlevels);
1223 #endif
1224
1225         if (s->fsck_passno > 0)
1226                 fprintf(f,
1227                         "%sFsckPassNo: %i\n",
1228                         prefix, s->fsck_passno);
1229
1230         if (s->status_text)
1231                 fprintf(f, "%sStatus Text: %s\n",
1232                         prefix, s->status_text);
1233
1234         free(p2);
1235 }
1236
1237 static int service_load_pid_file(Service *s) {
1238         char *k;
1239         int r;
1240         pid_t pid;
1241
1242         assert(s);
1243
1244         if (!s->pid_file)
1245                 return -ENOENT;
1246
1247         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1248                 return r;
1249
1250         r = parse_pid(k, &pid);
1251         free(k);
1252
1253         if (r < 0)
1254                 return r;
1255
1256         if (kill(pid, 0) < 0 && errno != EPERM) {
1257                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1258                             (unsigned long) pid, s->pid_file);
1259                 return -ESRCH;
1260         }
1261
1262         if ((r = service_set_main_pid(s, pid)) < 0)
1263                 return r;
1264
1265         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1266                 /* FIXME: we need to do something here */
1267                 return r;
1268
1269         return 0;
1270 }
1271
1272 static int service_search_main_pid(Service *s) {
1273         pid_t pid;
1274         int r;
1275
1276         assert(s);
1277
1278         /* If we know it anyway, don't ever fallback to unreliable
1279          * heuristics */
1280         if (s->main_pid_known)
1281                 return 0;
1282
1283         if (!s->guess_main_pid)
1284                 return 0;
1285
1286         assert(s->main_pid <= 0);
1287
1288         if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1289                 return -ENOENT;
1290
1291         if ((r = service_set_main_pid(s, pid)) < 0)
1292                 return r;
1293
1294         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1295                 /* FIXME: we need to do something here */
1296                 return r;
1297
1298         return 0;
1299 }
1300
1301 static int service_get_sockets(Service *s, Set **_set) {
1302         Set *set;
1303         Iterator i;
1304         char *t;
1305         int r;
1306
1307         assert(s);
1308         assert(_set);
1309
1310         if (s->socket_fd >= 0)
1311                 return 0;
1312
1313         if (!set_isempty(s->configured_sockets))
1314                 return 0;
1315
1316         /* Collects all Socket objects that belong to this
1317          * service. Note that a service might have multiple sockets
1318          * via multiple names. */
1319
1320         if (!(set = set_new(NULL, NULL)))
1321                 return -ENOMEM;
1322
1323         SET_FOREACH(t, s->meta.names, i) {
1324                 char *k;
1325                 Unit *p;
1326
1327                 /* Look for all socket objects that go by any of our
1328                  * units and collect their fds */
1329
1330                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1331                         r = -ENOMEM;
1332                         goto fail;
1333                 }
1334
1335                 p = manager_get_unit(s->meta.manager, k);
1336                 free(k);
1337
1338                 if (!p)
1339                         continue;
1340
1341                 if ((r = set_put(set, p)) < 0)
1342                         goto fail;
1343         }
1344
1345         *_set = set;
1346         return 0;
1347
1348 fail:
1349         set_free(set);
1350         return r;
1351 }
1352
1353 static int service_notify_sockets_dead(Service *s) {
1354         Iterator i;
1355         Set *set, *free_set = NULL;
1356         Socket *sock;
1357         int r;
1358
1359         assert(s);
1360
1361         /* Notifies all our sockets when we die */
1362
1363         if (s->socket_fd >= 0)
1364                 return 0;
1365
1366         if (!set_isempty(s->configured_sockets))
1367                 set = s->configured_sockets;
1368         else {
1369                 if ((r = service_get_sockets(s, &free_set)) < 0)
1370                         return r;
1371
1372                 set = free_set;
1373         }
1374
1375         SET_FOREACH(sock, set, i)
1376                 socket_notify_service_dead(sock);
1377
1378         set_free(free_set);
1379
1380         return 0;
1381 }
1382
1383 static void service_set_state(Service *s, ServiceState state) {
1384         ServiceState old_state;
1385         assert(s);
1386
1387         old_state = s->state;
1388         s->state = state;
1389
1390         if (state != SERVICE_START_PRE &&
1391             state != SERVICE_START &&
1392             state != SERVICE_START_POST &&
1393             state != SERVICE_RELOAD &&
1394             state != SERVICE_STOP &&
1395             state != SERVICE_STOP_SIGTERM &&
1396             state != SERVICE_STOP_SIGKILL &&
1397             state != SERVICE_STOP_POST &&
1398             state != SERVICE_FINAL_SIGTERM &&
1399             state != SERVICE_FINAL_SIGKILL &&
1400             state != SERVICE_AUTO_RESTART)
1401                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1402
1403         if (state != SERVICE_START &&
1404             state != SERVICE_START_POST &&
1405             state != SERVICE_RUNNING &&
1406             state != SERVICE_RELOAD &&
1407             state != SERVICE_STOP &&
1408             state != SERVICE_STOP_SIGTERM &&
1409             state != SERVICE_STOP_SIGKILL) {
1410                 service_unwatch_main_pid(s);
1411                 s->main_command = NULL;
1412         }
1413
1414         if (state != SERVICE_START_PRE &&
1415             state != SERVICE_START &&
1416             state != SERVICE_START_POST &&
1417             state != SERVICE_RELOAD &&
1418             state != SERVICE_STOP &&
1419             state != SERVICE_STOP_SIGTERM &&
1420             state != SERVICE_STOP_SIGKILL &&
1421             state != SERVICE_STOP_POST &&
1422             state != SERVICE_FINAL_SIGTERM &&
1423             state != SERVICE_FINAL_SIGKILL) {
1424                 service_unwatch_control_pid(s);
1425                 s->control_command = NULL;
1426                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1427         }
1428
1429         if (state == SERVICE_DEAD ||
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_FAILED ||
1437             state == SERVICE_AUTO_RESTART)
1438                 service_notify_sockets_dead(s);
1439
1440         if (state != SERVICE_START_PRE &&
1441             state != SERVICE_START &&
1442             state != SERVICE_START_POST &&
1443             state != SERVICE_RUNNING &&
1444             state != SERVICE_RELOAD &&
1445             state != SERVICE_STOP &&
1446             state != SERVICE_STOP_SIGTERM &&
1447             state != SERVICE_STOP_SIGKILL &&
1448             state != SERVICE_STOP_POST &&
1449             state != SERVICE_FINAL_SIGTERM &&
1450             state != SERVICE_FINAL_SIGKILL &&
1451             !(state == SERVICE_DEAD && s->meta.job)) {
1452                 service_close_socket_fd(s);
1453                 service_connection_unref(s);
1454         }
1455
1456         /* For the inactive states unit_notify() will trim the cgroup,
1457          * but for exit we have to do that ourselves... */
1458         if (state == SERVICE_EXITED)
1459                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1460
1461         if (old_state != state)
1462                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1463
1464         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1465         s->reload_failure = false;
1466 }
1467
1468 static int service_coldplug(Unit *u) {
1469         Service *s = SERVICE(u);
1470         int r;
1471
1472         assert(s);
1473         assert(s->state == SERVICE_DEAD);
1474
1475         if (s->deserialized_state != s->state) {
1476
1477                 if (s->deserialized_state == SERVICE_START_PRE ||
1478                     s->deserialized_state == SERVICE_START ||
1479                     s->deserialized_state == SERVICE_START_POST ||
1480                     s->deserialized_state == SERVICE_RELOAD ||
1481                     s->deserialized_state == SERVICE_STOP ||
1482                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1483                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1484                     s->deserialized_state == SERVICE_STOP_POST ||
1485                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1486                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1487                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1488
1489                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1490                                 usec_t k;
1491
1492                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1493
1494                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1495                                         return r;
1496                         }
1497                 }
1498
1499                 if ((s->deserialized_state == SERVICE_START &&
1500                      (s->type == SERVICE_FORKING ||
1501                       s->type == SERVICE_DBUS ||
1502                       s->type == SERVICE_ONESHOT ||
1503                       s->type == SERVICE_NOTIFY)) ||
1504                     s->deserialized_state == SERVICE_START_POST ||
1505                     s->deserialized_state == SERVICE_RUNNING ||
1506                     s->deserialized_state == SERVICE_RELOAD ||
1507                     s->deserialized_state == SERVICE_STOP ||
1508                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1509                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1510                         if (s->main_pid > 0)
1511                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1512                                         return r;
1513
1514                 if (s->deserialized_state == SERVICE_START_PRE ||
1515                     s->deserialized_state == SERVICE_START ||
1516                     s->deserialized_state == SERVICE_START_POST ||
1517                     s->deserialized_state == SERVICE_RELOAD ||
1518                     s->deserialized_state == SERVICE_STOP ||
1519                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1520                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1521                     s->deserialized_state == SERVICE_STOP_POST ||
1522                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1523                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1524                         if (s->control_pid > 0)
1525                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1526                                         return r;
1527
1528                 service_set_state(s, s->deserialized_state);
1529         }
1530
1531         return 0;
1532 }
1533
1534 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1535         Iterator i;
1536         int r;
1537         int *rfds = NULL;
1538         unsigned rn_fds = 0;
1539         Set *set, *free_set = NULL;
1540         Socket *sock;
1541
1542         assert(s);
1543         assert(fds);
1544         assert(n_fds);
1545
1546         if (s->socket_fd >= 0)
1547                 return 0;
1548
1549         if (!set_isempty(s->configured_sockets))
1550                 set = s->configured_sockets;
1551         else {
1552                 if ((r = service_get_sockets(s, &free_set)) < 0)
1553                         return r;
1554
1555                 set = free_set;
1556         }
1557
1558         SET_FOREACH(sock, set, i) {
1559                 int *cfds;
1560                 unsigned cn_fds;
1561
1562                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1563                         goto fail;
1564
1565                 if (!cfds)
1566                         continue;
1567
1568                 if (!rfds) {
1569                         rfds = cfds;
1570                         rn_fds = cn_fds;
1571                 } else {
1572                         int *t;
1573
1574                         if (!(t = new(int, rn_fds+cn_fds))) {
1575                                 free(cfds);
1576                                 r = -ENOMEM;
1577                                 goto fail;
1578                         }
1579
1580                         memcpy(t, rfds, rn_fds);
1581                         memcpy(t+rn_fds, cfds, cn_fds);
1582                         free(rfds);
1583                         free(cfds);
1584
1585                         rfds = t;
1586                         rn_fds = rn_fds+cn_fds;
1587                 }
1588         }
1589
1590         *fds = rfds;
1591         *n_fds = rn_fds;
1592
1593         set_free(free_set);
1594
1595         return 0;
1596
1597 fail:
1598         set_free(set);
1599         free(rfds);
1600
1601         return r;
1602 }
1603
1604 static int service_spawn(
1605                 Service *s,
1606                 ExecCommand *c,
1607                 bool timeout,
1608                 bool pass_fds,
1609                 bool apply_permissions,
1610                 bool apply_chroot,
1611                 bool apply_tty_stdin,
1612                 bool set_notify_socket,
1613                 pid_t *_pid) {
1614
1615         pid_t pid;
1616         int r;
1617         int *fds = NULL, *fdsbuf = NULL;
1618         unsigned n_fds = 0, n_env = 0;
1619         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1620
1621         assert(s);
1622         assert(c);
1623         assert(_pid);
1624
1625         if (pass_fds ||
1626             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1627             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1628             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1629
1630                 if (s->socket_fd >= 0) {
1631                         fds = &s->socket_fd;
1632                         n_fds = 1;
1633                 } else {
1634                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1635                                 goto fail;
1636
1637                         fds = fdsbuf;
1638                 }
1639         }
1640
1641         if (timeout && s->timeout_usec) {
1642                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1643                         goto fail;
1644         } else
1645                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1646
1647         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1648                 r = -ENOMEM;
1649                 goto fail;
1650         }
1651
1652         if (!(our_env = new0(char*, 4))) {
1653                 r = -ENOMEM;
1654                 goto fail;
1655         }
1656
1657         if (set_notify_socket)
1658                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1659                         r = -ENOMEM;
1660                         goto fail;
1661                 }
1662
1663         if (s->main_pid > 0)
1664                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1665                         r = -ENOMEM;
1666                         goto fail;
1667                 }
1668
1669         if (!(final_env = strv_env_merge(2,
1670                                          s->meta.manager->environment,
1671                                          our_env,
1672                                          NULL))) {
1673                 r = -ENOMEM;
1674                 goto fail;
1675         }
1676
1677         r = exec_spawn(c,
1678                        argv,
1679                        &s->exec_context,
1680                        fds, n_fds,
1681                        final_env,
1682                        apply_permissions,
1683                        apply_chroot,
1684                        apply_tty_stdin,
1685                        s->meta.manager->confirm_spawn,
1686                        s->meta.cgroup_bondings,
1687                        &pid);
1688
1689         if (r < 0)
1690                 goto fail;
1691
1692
1693         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1694                 /* FIXME: we need to do something here */
1695                 goto fail;
1696
1697         free(fdsbuf);
1698         strv_free(argv);
1699         strv_free(our_env);
1700         strv_free(final_env);
1701
1702         *_pid = pid;
1703
1704         return 0;
1705
1706 fail:
1707         free(fdsbuf);
1708         strv_free(argv);
1709         strv_free(our_env);
1710         strv_free(final_env);
1711
1712         if (timeout)
1713                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1714
1715         return r;
1716 }
1717
1718 static int main_pid_good(Service *s) {
1719         assert(s);
1720
1721         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1722          * don't know */
1723
1724         /* If we know the pid file, then lets just check if it is
1725          * still valid */
1726         if (s->main_pid_known)
1727                 return s->main_pid > 0;
1728
1729         /* We don't know the pid */
1730         return -EAGAIN;
1731 }
1732
1733 static int control_pid_good(Service *s) {
1734         assert(s);
1735
1736         return s->control_pid > 0;
1737 }
1738
1739 static int cgroup_good(Service *s) {
1740         int r;
1741
1742         assert(s);
1743
1744         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1745                 return r;
1746
1747         return !r;
1748 }
1749
1750 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1751         int r;
1752         assert(s);
1753
1754         if (!success)
1755                 s->failure = true;
1756
1757         if (allow_restart &&
1758             !s->forbid_restart &&
1759             (s->restart == SERVICE_RESTART_ALWAYS ||
1760              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1761              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1762              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1763               (s->main_exec_status.code == CLD_KILLED ||
1764                s->main_exec_status.code == CLD_DUMPED)))) {
1765
1766                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1767                         goto fail;
1768
1769                 service_set_state(s, SERVICE_AUTO_RESTART);
1770         } else
1771                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1772
1773         s->forbid_restart = false;
1774
1775         return;
1776
1777 fail:
1778         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1779         service_enter_dead(s, false, false);
1780 }
1781
1782 static void service_enter_signal(Service *s, ServiceState state, bool success);
1783
1784 static void service_enter_stop_post(Service *s, bool success) {
1785         int r;
1786         assert(s);
1787
1788         if (!success)
1789                 s->failure = true;
1790
1791         service_unwatch_control_pid(s);
1792
1793         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1794                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1795
1796                 if ((r = service_spawn(s,
1797                                        s->control_command,
1798                                        true,
1799                                        false,
1800                                        !s->permissions_start_only,
1801                                        !s->root_directory_start_only,
1802                                        true,
1803                                        false,
1804                                        &s->control_pid)) < 0)
1805                         goto fail;
1806
1807
1808                 service_set_state(s, SERVICE_STOP_POST);
1809         } else
1810                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1811
1812         return;
1813
1814 fail:
1815         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1816         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1817 }
1818
1819 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1820         int r;
1821         Set *pid_set = NULL;
1822         bool wait_for_exit = false;
1823
1824         assert(s);
1825
1826         if (!success)
1827                 s->failure = true;
1828
1829         if (s->exec_context.kill_mode != KILL_NONE) {
1830                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1831
1832                 if (s->main_pid > 0) {
1833                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1834                                  -s->main_pid :
1835                                  s->main_pid, sig) < 0 && errno != ESRCH)
1836
1837                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1838                         else
1839                                 wait_for_exit = true;
1840                 }
1841
1842                 if (s->control_pid > 0) {
1843                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1844                                  -s->control_pid :
1845                                  s->control_pid, sig) < 0 && errno != ESRCH)
1846
1847                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1848                         else
1849                                 wait_for_exit = true;
1850                 }
1851
1852                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1853
1854                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1855                                 r = -ENOMEM;
1856                                 goto fail;
1857                         }
1858
1859                         /* Exclude the main/control pids from being killed via the cgroup */
1860                         if (s->main_pid > 0)
1861                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1862                                         goto fail;
1863
1864                         if (s->control_pid > 0)
1865                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1866                                         goto fail;
1867
1868                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1869                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1870                                         log_warning("Failed to kill control group: %s", strerror(-r));
1871                         } else if (r > 0)
1872                                 wait_for_exit = true;
1873
1874                         set_free(pid_set);
1875                 }
1876         }
1877
1878         if (wait_for_exit) {
1879                 if (s->timeout_usec > 0)
1880                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1881                                 goto fail;
1882
1883                 service_set_state(s, state);
1884         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1885                 service_enter_stop_post(s, true);
1886         else
1887                 service_enter_dead(s, true, true);
1888
1889         return;
1890
1891 fail:
1892         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1893
1894         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1895                 service_enter_stop_post(s, false);
1896         else
1897                 service_enter_dead(s, false, true);
1898
1899         if (pid_set)
1900                 set_free(pid_set);
1901 }
1902
1903 static void service_enter_stop(Service *s, bool success) {
1904         int r;
1905
1906         assert(s);
1907
1908         if (!success)
1909                 s->failure = true;
1910
1911         service_unwatch_control_pid(s);
1912
1913         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1914                 s->control_command_id = SERVICE_EXEC_STOP;
1915
1916                 if ((r = service_spawn(s,
1917                                        s->control_command,
1918                                        true,
1919                                        false,
1920                                        !s->permissions_start_only,
1921                                        !s->root_directory_start_only,
1922                                        false,
1923                                        false,
1924                                        &s->control_pid)) < 0)
1925                         goto fail;
1926
1927                 service_set_state(s, SERVICE_STOP);
1928         } else
1929                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1930
1931         return;
1932
1933 fail:
1934         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1935         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1936 }
1937
1938 static void service_enter_running(Service *s, bool success) {
1939         int main_pid_ok, cgroup_ok;
1940         assert(s);
1941
1942         if (!success)
1943                 s->failure = true;
1944
1945         main_pid_ok = main_pid_good(s);
1946         cgroup_ok = cgroup_good(s);
1947
1948         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1949             (s->bus_name_good || s->type != SERVICE_DBUS))
1950                 service_set_state(s, SERVICE_RUNNING);
1951         else if (s->remain_after_exit)
1952                 service_set_state(s, SERVICE_EXITED);
1953         else
1954                 service_enter_stop(s, true);
1955 }
1956
1957 static void service_enter_start_post(Service *s) {
1958         int r;
1959         assert(s);
1960
1961         service_unwatch_control_pid(s);
1962
1963         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1964                 s->control_command_id = SERVICE_EXEC_START_POST;
1965
1966                 if ((r = service_spawn(s,
1967                                        s->control_command,
1968                                        true,
1969                                        false,
1970                                        !s->permissions_start_only,
1971                                        !s->root_directory_start_only,
1972                                        false,
1973                                        false,
1974                                        &s->control_pid)) < 0)
1975                         goto fail;
1976
1977                 service_set_state(s, SERVICE_START_POST);
1978         } else
1979                 service_enter_running(s, true);
1980
1981         return;
1982
1983 fail:
1984         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1985         service_enter_stop(s, false);
1986 }
1987
1988 static void service_enter_start(Service *s) {
1989         pid_t pid;
1990         int r;
1991         ExecCommand *c;
1992
1993         assert(s);
1994
1995         assert(s->exec_command[SERVICE_EXEC_START]);
1996         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1997
1998         if (s->type == SERVICE_FORKING)
1999                 service_unwatch_control_pid(s);
2000         else
2001                 service_unwatch_main_pid(s);
2002
2003         if (s->type == SERVICE_FORKING) {
2004                 s->control_command_id = SERVICE_EXEC_START;
2005                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2006
2007                 s->main_command = NULL;
2008         } else {
2009                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2010                 s->control_command = NULL;
2011
2012                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2013         }
2014
2015         if ((r = service_spawn(s,
2016                                c,
2017                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2018                                true,
2019                                true,
2020                                true,
2021                                true,
2022                                s->notify_access != NOTIFY_NONE,
2023                                &pid)) < 0)
2024                 goto fail;
2025
2026         if (s->type == SERVICE_SIMPLE) {
2027                 /* For simple services we immediately start
2028                  * the START_POST binaries. */
2029
2030                 service_set_main_pid(s, pid);
2031                 service_enter_start_post(s);
2032
2033         } else  if (s->type == SERVICE_FORKING) {
2034
2035                 /* For forking services we wait until the start
2036                  * process exited. */
2037
2038                 s->control_pid = pid;
2039                 service_set_state(s, SERVICE_START);
2040
2041         } else if (s->type == SERVICE_ONESHOT ||
2042                    s->type == SERVICE_DBUS ||
2043                    s->type == SERVICE_NOTIFY) {
2044
2045                 /* For oneshot services we wait until the start
2046                  * process exited, too, but it is our main process. */
2047
2048                 /* For D-Bus services we know the main pid right away,
2049                  * but wait for the bus name to appear on the
2050                  * bus. Notify services are similar. */
2051
2052                 service_set_main_pid(s, pid);
2053                 service_set_state(s, SERVICE_START);
2054         } else
2055                 assert_not_reached("Unknown service type");
2056
2057         return;
2058
2059 fail:
2060         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2061         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2062 }
2063
2064 static void service_enter_start_pre(Service *s) {
2065         int r;
2066
2067         assert(s);
2068
2069         service_unwatch_control_pid(s);
2070
2071         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2072                 s->control_command_id = SERVICE_EXEC_START_PRE;
2073
2074                 if ((r = service_spawn(s,
2075                                        s->control_command,
2076                                        true,
2077                                        false,
2078                                        !s->permissions_start_only,
2079                                        !s->root_directory_start_only,
2080                                        true,
2081                                        false,
2082                                        &s->control_pid)) < 0)
2083                         goto fail;
2084
2085                 service_set_state(s, SERVICE_START_PRE);
2086         } else
2087                 service_enter_start(s);
2088
2089         return;
2090
2091 fail:
2092         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2093         service_enter_dead(s, false, true);
2094 }
2095
2096 static void service_enter_restart(Service *s) {
2097         int r;
2098         DBusError error;
2099
2100         assert(s);
2101         dbus_error_init(&error);
2102
2103         if (s->meta.job) {
2104                 log_info("Job pending for unit, delaying automatic restart.");
2105
2106                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2107                         goto fail;
2108         }
2109
2110         service_enter_dead(s, true, false);
2111
2112         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2113                 goto fail;
2114
2115         log_debug("%s scheduled restart job.", s->meta.id);
2116         return;
2117
2118 fail:
2119         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2120         service_enter_dead(s, false, false);
2121
2122         dbus_error_free(&error);
2123 }
2124
2125 static void service_enter_reload(Service *s) {
2126         int r;
2127
2128         assert(s);
2129
2130         service_unwatch_control_pid(s);
2131
2132         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2133                 s->control_command_id = SERVICE_EXEC_RELOAD;
2134
2135                 if ((r = service_spawn(s,
2136                                        s->control_command,
2137                                        true,
2138                                        false,
2139                                        !s->permissions_start_only,
2140                                        !s->root_directory_start_only,
2141                                        false,
2142                                        false,
2143                                        &s->control_pid)) < 0)
2144                         goto fail;
2145
2146                 service_set_state(s, SERVICE_RELOAD);
2147         } else
2148                 service_enter_running(s, true);
2149
2150         return;
2151
2152 fail:
2153         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2154         s->reload_failure = true;
2155         service_enter_running(s, true);
2156 }
2157
2158 static void service_run_next_control(Service *s, bool success) {
2159         int r;
2160
2161         assert(s);
2162         assert(s->control_command);
2163         assert(s->control_command->command_next);
2164
2165         if (!success)
2166                 s->failure = true;
2167
2168         assert(s->control_command_id != SERVICE_EXEC_START);
2169
2170         s->control_command = s->control_command->command_next;
2171         service_unwatch_control_pid(s);
2172
2173         if ((r = service_spawn(s,
2174                                s->control_command,
2175                                true,
2176                                false,
2177                                !s->permissions_start_only,
2178                                !s->root_directory_start_only,
2179                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2180                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2181                                false,
2182                                &s->control_pid)) < 0)
2183                 goto fail;
2184
2185         return;
2186
2187 fail:
2188         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2189
2190         if (s->state == SERVICE_START_PRE)
2191                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2192         else if (s->state == SERVICE_STOP)
2193                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2194         else if (s->state == SERVICE_STOP_POST)
2195                 service_enter_dead(s, false, true);
2196         else if (s->state == SERVICE_RELOAD) {
2197                 s->reload_failure = true;
2198                 service_enter_running(s, true);
2199         } else
2200                 service_enter_stop(s, false);
2201 }
2202
2203 static void service_run_next_main(Service *s, bool success) {
2204         pid_t pid;
2205         int r;
2206
2207         assert(s);
2208         assert(s->main_command);
2209         assert(s->main_command->command_next);
2210         assert(s->type == SERVICE_ONESHOT);
2211
2212         if (!success)
2213                 s->failure = true;
2214
2215         s->main_command = s->main_command->command_next;
2216         service_unwatch_main_pid(s);
2217
2218         if ((r = service_spawn(s,
2219                                s->main_command,
2220                                false,
2221                                true,
2222                                true,
2223                                true,
2224                                true,
2225                                s->notify_access != NOTIFY_NONE,
2226                                &pid)) < 0)
2227                 goto fail;
2228
2229         service_set_main_pid(s, pid);
2230
2231         return;
2232
2233 fail:
2234         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2235         service_enter_stop(s, false);
2236 }
2237
2238 static int service_start(Unit *u) {
2239         Service *s = SERVICE(u);
2240
2241         assert(s);
2242
2243         /* We cannot fulfill this request right now, try again later
2244          * please! */
2245         if (s->state == SERVICE_STOP ||
2246             s->state == SERVICE_STOP_SIGTERM ||
2247             s->state == SERVICE_STOP_SIGKILL ||
2248             s->state == SERVICE_STOP_POST ||
2249             s->state == SERVICE_FINAL_SIGTERM ||
2250             s->state == SERVICE_FINAL_SIGKILL)
2251                 return -EAGAIN;
2252
2253         /* Already on it! */
2254         if (s->state == SERVICE_START_PRE ||
2255             s->state == SERVICE_START ||
2256             s->state == SERVICE_START_POST)
2257                 return 0;
2258
2259         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2260
2261         /* Make sure we don't enter a busy loop of some kind. */
2262         if (!ratelimit_test(&s->ratelimit)) {
2263                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2264                 return -ECANCELED;
2265         }
2266
2267         s->failure = false;
2268         s->main_pid_known = false;
2269         s->forbid_restart = false;
2270
2271         service_enter_start_pre(s);
2272         return 0;
2273 }
2274
2275 static int service_stop(Unit *u) {
2276         Service *s = SERVICE(u);
2277
2278         assert(s);
2279
2280         /* This is a user request, so don't do restarts on this
2281          * shutdown. */
2282         s->forbid_restart = true;
2283
2284         /* Already on it */
2285         if (s->state == SERVICE_STOP ||
2286             s->state == SERVICE_STOP_SIGTERM ||
2287             s->state == SERVICE_STOP_SIGKILL ||
2288             s->state == SERVICE_STOP_POST ||
2289             s->state == SERVICE_FINAL_SIGTERM ||
2290             s->state == SERVICE_FINAL_SIGKILL)
2291                 return 0;
2292
2293         /* Don't allow a restart */
2294         if (s->state == SERVICE_AUTO_RESTART) {
2295                 service_set_state(s, SERVICE_DEAD);
2296                 return 0;
2297         }
2298
2299         /* If there's already something running we go directly into
2300          * kill mode. */
2301         if (s->state == SERVICE_START_PRE ||
2302             s->state == SERVICE_START ||
2303             s->state == SERVICE_START_POST ||
2304             s->state == SERVICE_RELOAD) {
2305                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2306                 return 0;
2307         }
2308
2309         assert(s->state == SERVICE_RUNNING ||
2310                s->state == SERVICE_EXITED);
2311
2312         service_enter_stop(s, true);
2313         return 0;
2314 }
2315
2316 static int service_reload(Unit *u) {
2317         Service *s = SERVICE(u);
2318
2319         assert(s);
2320
2321         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2322
2323         service_enter_reload(s);
2324         return 0;
2325 }
2326
2327 static bool service_can_reload(Unit *u) {
2328         Service *s = SERVICE(u);
2329
2330         assert(s);
2331
2332         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2333 }
2334
2335 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2336         Service *s = SERVICE(u);
2337
2338         assert(u);
2339         assert(f);
2340         assert(fds);
2341
2342         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2343         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2344
2345         if (s->control_pid > 0)
2346                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2347
2348         if (s->main_pid_known && s->main_pid > 0)
2349                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2350
2351         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2352
2353         if (s->status_text)
2354                 unit_serialize_item(u, f, "status-text", s->status_text);
2355
2356         /* There's a minor uncleanliness here: if there are multiple
2357          * commands attached here, we will start from the first one
2358          * again */
2359         if (s->control_command_id >= 0)
2360                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2361
2362         if (s->socket_fd >= 0) {
2363                 int copy;
2364
2365                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2366                         return copy;
2367
2368                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2369         }
2370
2371         if (s->main_exec_status.pid > 0) {
2372                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2373                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2374                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2375
2376                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2377                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2378                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2379                 }
2380         }
2381
2382         return 0;
2383 }
2384
2385 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2386         Service *s = SERVICE(u);
2387
2388         assert(u);
2389         assert(key);
2390         assert(value);
2391         assert(fds);
2392
2393         if (streq(key, "state")) {
2394                 ServiceState state;
2395
2396                 if ((state = service_state_from_string(value)) < 0)
2397                         log_debug("Failed to parse state value %s", value);
2398                 else
2399                         s->deserialized_state = state;
2400         } else if (streq(key, "failure")) {
2401                 int b;
2402
2403                 if ((b = parse_boolean(value)) < 0)
2404                         log_debug("Failed to parse failure value %s", value);
2405                 else
2406                         s->failure = b || s->failure;
2407         } else if (streq(key, "control-pid")) {
2408                 pid_t pid;
2409
2410                 if (parse_pid(value, &pid) < 0)
2411                         log_debug("Failed to parse control-pid value %s", value);
2412                 else
2413                         s->control_pid = pid;
2414         } else if (streq(key, "main-pid")) {
2415                 pid_t pid;
2416
2417                 if (parse_pid(value, &pid) < 0)
2418                         log_debug("Failed to parse main-pid value %s", value);
2419                 else
2420                         service_set_main_pid(s, (pid_t) pid);
2421         } else if (streq(key, "main-pid-known")) {
2422                 int b;
2423
2424                 if ((b = parse_boolean(value)) < 0)
2425                         log_debug("Failed to parse main-pid-known value %s", value);
2426                 else
2427                         s->main_pid_known = b;
2428         } else if (streq(key, "status-text")) {
2429                 char *t;
2430
2431                 if ((t = strdup(value))) {
2432                         free(s->status_text);
2433                         s->status_text = t;
2434                 }
2435
2436         } else if (streq(key, "control-command")) {
2437                 ServiceExecCommand id;
2438
2439                 if ((id = service_exec_command_from_string(value)) < 0)
2440                         log_debug("Failed to parse exec-command value %s", value);
2441                 else {
2442                         s->control_command_id = id;
2443                         s->control_command = s->exec_command[id];
2444                 }
2445         } else if (streq(key, "socket-fd")) {
2446                 int fd;
2447
2448                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2449                         log_debug("Failed to parse socket-fd value %s", value);
2450                 else {
2451
2452                         if (s->socket_fd >= 0)
2453                                 close_nointr_nofail(s->socket_fd);
2454                         s->socket_fd = fdset_remove(fds, fd);
2455                 }
2456         } else if (streq(key, "main-exec-status-pid")) {
2457                 pid_t pid;
2458
2459                 if (parse_pid(value, &pid) < 0)
2460                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2461                 else
2462                         s->main_exec_status.pid = pid;
2463         } else if (streq(key, "main-exec-status-code")) {
2464                 int i;
2465
2466                 if (safe_atoi(value, &i) < 0)
2467                         log_debug("Failed to parse main-exec-status-code value %s", value);
2468                 else
2469                         s->main_exec_status.code = i;
2470         } else if (streq(key, "main-exec-status-status")) {
2471                 int i;
2472
2473                 if (safe_atoi(value, &i) < 0)
2474                         log_debug("Failed to parse main-exec-status-status value %s", value);
2475                 else
2476                         s->main_exec_status.status = i;
2477         } else if (streq(key, "main-exec-status-start"))
2478                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2479         else if (streq(key, "main-exec-status-exit"))
2480                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2481         else
2482                 log_debug("Unknown serialization key '%s'", key);
2483
2484         return 0;
2485 }
2486
2487 static UnitActiveState service_active_state(Unit *u) {
2488         assert(u);
2489
2490         return state_translation_table[SERVICE(u)->state];
2491 }
2492
2493 static const char *service_sub_state_to_string(Unit *u) {
2494         assert(u);
2495
2496         return service_state_to_string(SERVICE(u)->state);
2497 }
2498
2499 static bool service_check_gc(Unit *u) {
2500         Service *s = SERVICE(u);
2501
2502         assert(s);
2503
2504         /* Never clean up services that still have a process around,
2505          * even if the service is formally dead. */
2506         if (cgroup_good(s) > 0 ||
2507             main_pid_good(s) > 0 ||
2508             control_pid_good(s) > 0)
2509                 return true;
2510
2511 #ifdef HAVE_SYSV_COMPAT
2512         if (s->sysv_path)
2513                 return true;
2514 #endif
2515
2516         return false;
2517 }
2518
2519 static bool service_check_snapshot(Unit *u) {
2520         Service *s = SERVICE(u);
2521
2522         assert(s);
2523
2524         return !s->got_socket_fd;
2525 }
2526
2527 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2528         Service *s = SERVICE(u);
2529         bool success;
2530
2531         assert(s);
2532         assert(pid >= 0);
2533
2534         if (!s->meta.fragment_path)
2535                 success = is_clean_exit_lsb(code, status);
2536         else
2537                 success = is_clean_exit(code, status);
2538
2539         if (s->main_pid == pid) {
2540
2541                 s->main_pid = 0;
2542                 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2543
2544                 /* If this is not a forking service than the main
2545                  * process got started and hence we copy the exit
2546                  * status so that it is recorded both as main and as
2547                  * control process exit status */
2548                 if (s->main_command) {
2549                         s->main_command->exec_status = s->main_exec_status;
2550
2551                         if (s->main_command->ignore)
2552                                 success = true;
2553                 }
2554
2555                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2556                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2557                 s->failure = s->failure || !success;
2558
2559                 if (s->main_command &&
2560                     s->main_command->command_next &&
2561                     success) {
2562
2563                         /* There is another command to *
2564                          * execute, so let's do that. */
2565
2566                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2567                         service_run_next_main(s, success);
2568
2569                 } else {
2570
2571                         /* The service exited, so the service is officially
2572                          * gone. */
2573                         s->main_command = NULL;
2574
2575                         switch (s->state) {
2576
2577                         case SERVICE_START_POST:
2578                         case SERVICE_RELOAD:
2579                         case SERVICE_STOP:
2580                                 /* Need to wait until the operation is
2581                                  * done */
2582                                 break;
2583
2584                         case SERVICE_START:
2585                                 if (s->type == SERVICE_ONESHOT) {
2586                                         /* This was our main goal, so let's go on */
2587                                         if (success)
2588                                                 service_enter_start_post(s);
2589                                         else
2590                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2591                                         break;
2592                                 } else {
2593                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2594
2595                                         /* Fall through */
2596                                 }
2597
2598                         case SERVICE_RUNNING:
2599                                 service_enter_running(s, success);
2600                                 break;
2601
2602                         case SERVICE_STOP_SIGTERM:
2603                         case SERVICE_STOP_SIGKILL:
2604
2605                                 if (!control_pid_good(s))
2606                                         service_enter_stop_post(s, success);
2607
2608                                 /* If there is still a control process, wait for that first */
2609                                 break;
2610
2611                         default:
2612                                 assert_not_reached("Uh, main process died at wrong time.");
2613                         }
2614                 }
2615
2616         } else if (s->control_pid == pid) {
2617
2618                 s->control_pid = 0;
2619
2620                 if (s->control_command) {
2621                         exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2622
2623                         if (s->control_command->ignore)
2624                                 success = true;
2625                 }
2626
2627                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2628                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2629                 s->failure = s->failure || !success;
2630
2631                 if (s->control_command &&
2632                     s->control_command->command_next &&
2633                     success) {
2634
2635                         /* There is another command to *
2636                          * execute, so let's do that. */
2637
2638                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2639                         service_run_next_control(s, success);
2640
2641                 } else {
2642                         /* No further commands for this step, so let's
2643                          * figure out what to do next */
2644
2645                         s->control_command = NULL;
2646                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2647
2648                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2649
2650                         switch (s->state) {
2651
2652                         case SERVICE_START_PRE:
2653                                 if (success)
2654                                         service_enter_start(s);
2655                                 else
2656                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2657                                 break;
2658
2659                         case SERVICE_START:
2660                                 assert(s->type == SERVICE_FORKING);
2661
2662                                 /* Let's try to load the pid
2663                                  * file here if we can. We
2664                                  * ignore the return value,
2665                                  * since the PID file might
2666                                  * actually be created by a
2667                                  * START_POST script */
2668
2669                                 if (success) {
2670                                         service_load_pid_file(s);
2671                                         service_search_main_pid(s);
2672
2673                                         service_enter_start_post(s);
2674                                 } else
2675                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2676
2677                                 break;
2678
2679                         case SERVICE_START_POST:
2680                                 if (success && s->pid_file && !s->main_pid_known) {
2681                                         int r;
2682
2683                                         /* Hmm, let's see if we can
2684                                          * load the pid now after the
2685                                          * start-post scripts got
2686                                          * executed. */
2687
2688                                         if ((r = service_load_pid_file(s)) < 0)
2689                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2690                                 }
2691
2692                                 s->reload_failure = !success;
2693                                 service_enter_running(s, true);
2694                                 break;
2695
2696                         case SERVICE_RELOAD:
2697                                 if (success) {
2698                                         service_load_pid_file(s);
2699                                         service_search_main_pid(s);
2700                                 }
2701
2702                                 s->reload_failure = !success;
2703                                 service_enter_running(s, true);
2704                                 break;
2705
2706                         case SERVICE_STOP:
2707                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2708                                 break;
2709
2710                         case SERVICE_STOP_SIGTERM:
2711                         case SERVICE_STOP_SIGKILL:
2712                                 if (main_pid_good(s) <= 0)
2713                                         service_enter_stop_post(s, success);
2714
2715                                 /* If there is still a service
2716                                  * process around, wait until
2717                                  * that one quit, too */
2718                                 break;
2719
2720                         case SERVICE_STOP_POST:
2721                         case SERVICE_FINAL_SIGTERM:
2722                         case SERVICE_FINAL_SIGKILL:
2723                                 service_enter_dead(s, success, true);
2724                                 break;
2725
2726                         default:
2727                                 assert_not_reached("Uh, control process died at wrong time.");
2728                         }
2729                 }
2730         }
2731
2732         /* Notify clients about changed exit status */
2733         unit_add_to_dbus_queue(u);
2734 }
2735
2736 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2737         Service *s = SERVICE(u);
2738
2739         assert(s);
2740         assert(elapsed == 1);
2741
2742         assert(w == &s->timer_watch);
2743
2744         switch (s->state) {
2745
2746         case SERVICE_START_PRE:
2747         case SERVICE_START:
2748                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2749                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2750                 break;
2751
2752         case SERVICE_START_POST:
2753                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2754                 service_enter_stop(s, false);
2755                 break;
2756
2757         case SERVICE_RELOAD:
2758                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2759                 s->reload_failure = true;
2760                 service_enter_running(s, true);
2761                 break;
2762
2763         case SERVICE_STOP:
2764                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2765                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2766                 break;
2767
2768         case SERVICE_STOP_SIGTERM:
2769                 if (s->exec_context.send_sigkill) {
2770                         log_warning("%s stopping timed out. Killing.", u->meta.id);
2771                         service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2772                 } else {
2773                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2774                         service_enter_stop_post(s, false);
2775                 }
2776
2777                 break;
2778
2779         case SERVICE_STOP_SIGKILL:
2780                 /* Uh, we sent a SIGKILL and it is still not gone?
2781                  * Must be something we cannot kill, so let's just be
2782                  * weirded out and continue */
2783
2784                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2785                 service_enter_stop_post(s, false);
2786                 break;
2787
2788         case SERVICE_STOP_POST:
2789                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2790                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2791                 break;
2792
2793         case SERVICE_FINAL_SIGTERM:
2794                 if (s->exec_context.send_sigkill) {
2795                         log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2796                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2797                 } else {
2798                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2799                         service_enter_dead(s, false, true);
2800                 }
2801
2802                 break;
2803
2804         case SERVICE_FINAL_SIGKILL:
2805                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2806                 service_enter_dead(s, false, true);
2807                 break;
2808
2809         case SERVICE_AUTO_RESTART:
2810                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2811                 service_enter_restart(s);
2812                 break;
2813
2814         default:
2815                 assert_not_reached("Timeout at wrong time.");
2816         }
2817 }
2818
2819 static void service_cgroup_notify_event(Unit *u) {
2820         Service *s = SERVICE(u);
2821
2822         assert(u);
2823
2824         log_debug("%s: cgroup is empty", u->meta.id);
2825
2826         switch (s->state) {
2827
2828                 /* Waiting for SIGCHLD is usually more interesting,
2829                  * because it includes return codes/signals. Which is
2830                  * why we ignore the cgroup events for most cases,
2831                  * except when we don't know pid which to expect the
2832                  * SIGCHLD for. */
2833
2834         case SERVICE_RUNNING:
2835                 service_enter_running(s, true);
2836                 break;
2837
2838         case SERVICE_STOP_SIGTERM:
2839         case SERVICE_STOP_SIGKILL:
2840                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2841                         service_enter_stop_post(s, true);
2842
2843                 break;
2844
2845         case SERVICE_FINAL_SIGTERM:
2846         case SERVICE_FINAL_SIGKILL:
2847                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2848                         service_enter_dead(s, true, true);
2849
2850                 break;
2851
2852         default:
2853                 ;
2854         }
2855 }
2856
2857 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2858         Service *s = SERVICE(u);
2859         const char *e;
2860
2861         assert(u);
2862
2863         if (s->notify_access == NOTIFY_NONE) {
2864                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2865                             u->meta.id, (unsigned long) pid);
2866                 return;
2867         }
2868
2869         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2870                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2871                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2872                 return;
2873         }
2874
2875         log_debug("%s: Got message", u->meta.id);
2876
2877         /* Interpret MAINPID= */
2878         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2879             (s->state == SERVICE_START ||
2880              s->state == SERVICE_START_POST ||
2881              s->state == SERVICE_RUNNING ||
2882              s->state == SERVICE_RELOAD)) {
2883
2884                 if (parse_pid(e + 8, &pid) < 0)
2885                         log_warning("Failed to parse notification message %s", e);
2886                 else {
2887                         log_debug("%s: got %s", u->meta.id, e);
2888                         service_set_main_pid(s, pid);
2889                 }
2890         }
2891
2892         /* Interpret READY= */
2893         if (s->type == SERVICE_NOTIFY &&
2894             s->state == SERVICE_START &&
2895             strv_find(tags, "READY=1")) {
2896                 log_debug("%s: got READY=1", u->meta.id);
2897
2898                 service_enter_start_post(s);
2899         }
2900
2901         /* Interpret STATUS= */
2902         if ((e = strv_find_prefix(tags, "STATUS="))) {
2903                 char *t;
2904
2905                 if (e[7]) {
2906                         if (!(t = strdup(e+7))) {
2907                                 log_error("Failed to allocate string.");
2908                                 return;
2909                         }
2910
2911                         log_debug("%s: got %s", u->meta.id, e);
2912
2913                         free(s->status_text);
2914                         s->status_text = t;
2915                 } else {
2916                         free(s->status_text);
2917                         s->status_text = NULL;
2918                 }
2919
2920         }
2921
2922         /* Notify clients about changed status or main pid */
2923         unit_add_to_dbus_queue(u);
2924 }
2925
2926 #ifdef HAVE_SYSV_COMPAT
2927 static int service_enumerate(Manager *m) {
2928         char **p;
2929         unsigned i;
2930         DIR *d = NULL;
2931         char *path = NULL, *fpath = NULL, *name = NULL;
2932         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2933         Unit *service;
2934         Iterator j;
2935         int r;
2936
2937         assert(m);
2938
2939         zero(runlevel_services);
2940
2941         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2942                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2943                         struct dirent *de;
2944
2945                         free(path);
2946                         path = NULL;
2947                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2948                                 r = -ENOMEM;
2949                                 goto finish;
2950                         }
2951
2952                         if (d)
2953                                 closedir(d);
2954
2955                         if (!(d = opendir(path))) {
2956                                 if (errno != ENOENT)
2957                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2958
2959                                 continue;
2960                         }
2961
2962                         while ((de = readdir(d))) {
2963                                 int a, b;
2964
2965                                 if (ignore_file(de->d_name))
2966                                         continue;
2967
2968                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2969                                         continue;
2970
2971                                 if (strlen(de->d_name) < 4)
2972                                         continue;
2973
2974                                 a = undecchar(de->d_name[1]);
2975                                 b = undecchar(de->d_name[2]);
2976
2977                                 if (a < 0 || b < 0)
2978                                         continue;
2979
2980                                 free(fpath);
2981                                 fpath = NULL;
2982                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2983                                         r = -ENOMEM;
2984                                         goto finish;
2985                                 }
2986
2987                                 if (access(fpath, X_OK) < 0) {
2988
2989                                         if (errno != ENOENT)
2990                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2991
2992                                         continue;
2993                                 }
2994
2995                                 free(name);
2996                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2997                                         r = -ENOMEM;
2998                                         goto finish;
2999                                 }
3000
3001                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
3002                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3003                                         continue;
3004                                 }
3005
3006                                 if (de->d_name[0] == 'S')  {
3007
3008                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
3009                                                 SERVICE(service)->sysv_start_priority =
3010                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
3011
3012                                                 SERVICE(service)->sysv_enabled = true;
3013                                         }
3014
3015                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3016                                                 goto finish;
3017
3018                                         if ((r = set_put(runlevel_services[i], service)) < 0)
3019                                                 goto finish;
3020
3021                                 } else if (de->d_name[0] == 'K' &&
3022                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
3023                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3024
3025                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3026                                                 goto finish;
3027
3028                                         if ((r = set_put(shutdown_services, service)) < 0)
3029                                                 goto finish;
3030                                 }
3031                         }
3032                 }
3033
3034         /* Now we loaded all stubs and are aware of the lowest
3035         start-up priority for all services, not let's actually load
3036         the services, this will also tell us which services are
3037         actually native now */
3038         manager_dispatch_load_queue(m);
3039
3040         /* If this is a native service, rely on native ways to pull in
3041          * a service, don't pull it in via sysv rcN.d links. */
3042         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3043                 SET_FOREACH(service, runlevel_services[i], j) {
3044                         service = unit_follow_merge(service);
3045
3046                         if (service->meta.fragment_path)
3047                                 continue;
3048
3049                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3050                                 goto finish;
3051                 }
3052
3053         /* We honour K links only for halt/reboot. For the normal
3054          * runlevels we assume the stop jobs will be implicitly added
3055          * by the core logic. Also, we don't really distinguish here
3056          * between the runlevels 0 and 6 and just add them to the
3057          * special shutdown target. On SUSE the boot.d/ runlevel is
3058          * also used for shutdown, so we add links for that too to the
3059          * shutdown target.*/
3060         SET_FOREACH(service, shutdown_services, j) {
3061                 service = unit_follow_merge(service);
3062
3063                 if (service->meta.fragment_path)
3064                         continue;
3065
3066                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3067                         goto finish;
3068         }
3069
3070         r = 0;
3071
3072 finish:
3073         free(path);
3074         free(fpath);
3075         free(name);
3076
3077         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3078                 set_free(runlevel_services[i]);
3079         set_free(shutdown_services);
3080
3081         if (d)
3082                 closedir(d);
3083
3084         return r;
3085 }
3086 #endif
3087
3088 static void service_bus_name_owner_change(
3089                 Unit *u,
3090                 const char *name,
3091                 const char *old_owner,
3092                 const char *new_owner) {
3093
3094         Service *s = SERVICE(u);
3095
3096         assert(s);
3097         assert(name);
3098
3099         assert(streq(s->bus_name, name));
3100         assert(old_owner || new_owner);
3101
3102         if (old_owner && new_owner)
3103                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3104         else if (old_owner)
3105                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3106         else
3107                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3108
3109         s->bus_name_good = !!new_owner;
3110
3111         if (s->type == SERVICE_DBUS) {
3112
3113                 /* service_enter_running() will figure out what to
3114                  * do */
3115                 if (s->state == SERVICE_RUNNING)
3116                         service_enter_running(s, true);
3117                 else if (s->state == SERVICE_START && new_owner)
3118                         service_enter_start_post(s);
3119
3120         } else if (new_owner &&
3121                    s->main_pid <= 0 &&
3122                    (s->state == SERVICE_START ||
3123                     s->state == SERVICE_START_POST ||
3124                     s->state == SERVICE_RUNNING ||
3125                     s->state == SERVICE_RELOAD)) {
3126
3127                 /* Try to acquire PID from bus service */
3128                 log_debug("Trying to acquire PID from D-Bus name...");
3129
3130                 bus_query_pid(u->meta.manager, name);
3131         }
3132 }
3133
3134 static void service_bus_query_pid_done(
3135                 Unit *u,
3136                 const char *name,
3137                 pid_t pid) {
3138
3139         Service *s = SERVICE(u);
3140
3141         assert(s);
3142         assert(name);
3143
3144         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3145
3146         if (s->main_pid <= 0 &&
3147             (s->state == SERVICE_START ||
3148              s->state == SERVICE_START_POST ||
3149              s->state == SERVICE_RUNNING ||
3150              s->state == SERVICE_RELOAD))
3151                 service_set_main_pid(s, pid);
3152 }
3153
3154 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3155         assert(s);
3156         assert(fd >= 0);
3157
3158         /* This is called by the socket code when instantiating a new
3159          * service for a stream socket and the socket needs to be
3160          * configured. */
3161
3162         if (s->meta.load_state != UNIT_LOADED)
3163                 return -EINVAL;
3164
3165         if (s->socket_fd >= 0)
3166                 return -EBUSY;
3167
3168         if (s->state != SERVICE_DEAD)
3169                 return -EAGAIN;
3170
3171         s->socket_fd = fd;
3172         s->got_socket_fd = true;
3173         s->accept_socket = sock;
3174
3175         return 0;
3176 }
3177
3178 static void service_reset_failed(Unit *u) {
3179         Service *s = SERVICE(u);
3180
3181         assert(s);
3182
3183         if (s->state == SERVICE_FAILED)
3184                 service_set_state(s, SERVICE_DEAD);
3185
3186         s->failure = false;
3187 }
3188
3189 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3190         Service *s = SERVICE(u);
3191         int r = 0;
3192         Set *pid_set = NULL;
3193
3194         assert(s);
3195
3196         if (s->main_pid <= 0 && who == KILL_MAIN) {
3197                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3198                 return -EINVAL;
3199         }
3200
3201         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3202                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3203                 return -ENOENT;
3204         }
3205
3206         if (s->control_pid > 0)
3207                 if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0)
3208                         r = -errno;
3209
3210         if (s->main_pid > 0)
3211                 if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0)
3212                         r = -errno;
3213
3214         if (mode == KILL_CONTROL_GROUP) {
3215                 int q;
3216
3217                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3218                         return -ENOMEM;
3219
3220                 /* Exclude the control/main pid from being killed via the cgroup */
3221                 if (s->control_pid > 0)
3222                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3223                                 r = q;
3224                                 goto finish;
3225                         }
3226
3227                 if (s->main_pid > 0)
3228                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3229                                 r = q;
3230                                 goto finish;
3231                         }
3232
3233                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, pid_set)) < 0)
3234                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3235                                 r = q;
3236         }
3237
3238 finish:
3239         if (pid_set)
3240                 set_free(pid_set);
3241
3242         return r;
3243 }
3244
3245 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3246         [SERVICE_DEAD] = "dead",
3247         [SERVICE_START_PRE] = "start-pre",
3248         [SERVICE_START] = "start",
3249         [SERVICE_START_POST] = "start-post",
3250         [SERVICE_RUNNING] = "running",
3251         [SERVICE_EXITED] = "exited",
3252         [SERVICE_RELOAD] = "reload",
3253         [SERVICE_STOP] = "stop",
3254         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3255         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3256         [SERVICE_STOP_POST] = "stop-post",
3257         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3258         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3259         [SERVICE_FAILED] = "failed",
3260         [SERVICE_AUTO_RESTART] = "auto-restart",
3261 };
3262
3263 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3264
3265 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3266         [SERVICE_RESTART_NO] = "no",
3267         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3268         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3269         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3270         [SERVICE_RESTART_ALWAYS] = "always"
3271 };
3272
3273 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3274
3275 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3276         [SERVICE_SIMPLE] = "simple",
3277         [SERVICE_FORKING] = "forking",
3278         [SERVICE_ONESHOT] = "oneshot",
3279         [SERVICE_DBUS] = "dbus",
3280         [SERVICE_NOTIFY] = "notify"
3281 };
3282
3283 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3284
3285 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3286         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3287         [SERVICE_EXEC_START] = "ExecStart",
3288         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3289         [SERVICE_EXEC_RELOAD] = "ExecReload",
3290         [SERVICE_EXEC_STOP] = "ExecStop",
3291         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3292 };
3293
3294 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3295
3296 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3297         [NOTIFY_NONE] = "none",
3298         [NOTIFY_MAIN] = "main",
3299         [NOTIFY_ALL] = "all"
3300 };
3301
3302 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3303
3304 const UnitVTable service_vtable = {
3305         .suffix = ".service",
3306         .show_status = true,
3307
3308         .init = service_init,
3309         .done = service_done,
3310         .load = service_load,
3311
3312         .coldplug = service_coldplug,
3313
3314         .dump = service_dump,
3315
3316         .start = service_start,
3317         .stop = service_stop,
3318         .reload = service_reload,
3319
3320         .can_reload = service_can_reload,
3321
3322         .kill = service_kill,
3323
3324         .serialize = service_serialize,
3325         .deserialize_item = service_deserialize_item,
3326
3327         .active_state = service_active_state,
3328         .sub_state_to_string = service_sub_state_to_string,
3329
3330         .check_gc = service_check_gc,
3331         .check_snapshot = service_check_snapshot,
3332
3333         .sigchld_event = service_sigchld_event,
3334         .timer_event = service_timer_event,
3335
3336         .reset_failed = service_reset_failed,
3337
3338         .cgroup_notify_empty = service_cgroup_notify_event,
3339         .notify_message = service_notify_message,
3340
3341         .bus_name_owner_change = service_bus_name_owner_change,
3342         .bus_query_pid_done = service_bus_query_pid_done,
3343
3344         .bus_interface = "org.freedesktop.systemd1.Service",
3345         .bus_message_handler = bus_service_message_handler,
3346         .bus_invalidating_properties =  bus_service_invalidating_properties,
3347
3348 #ifdef HAVE_SYSV_COMPAT
3349         .enumerate = service_enumerate
3350 #endif
3351 };