src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35 #include "special.h"
  36 #include "bus-errors.h"
  37
  38 #define COMMENTS "#;\n"
  39 #define NEWLINES "\n\r"
  40
  41 #ifdef HAVE_SYSV_COMPAT
  42
  43 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
  44
  45 typedef enum RunlevelType {
  46         RUNLEVEL_UP,
  47         RUNLEVEL_DOWN,
  48         RUNLEVEL_SYSINIT
  49 } RunlevelType;
  50
  51 static const struct {
  52         const char *path;
  53         const char *target;
  54         const RunlevelType type;
  55 } rcnd_table[] = {
  56         /* Standard SysV runlevels for start-up */
  57         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  58         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  59         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  60         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  61         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  62
  63 #ifdef TARGET_SUSE
  64         /* SUSE style boot.d */
  65         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  66 #endif
  67
  68 #ifdef TARGET_DEBIAN
  69         /* Debian style rcS.d */
  70         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  71 #endif
  72
  73         /* Standard SysV runlevels for shutdown */
  74         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  75         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  76
  77         /* Note that the order here matters, as we read the
  78            directories in this order, and we want to make sure that
  79            sysv_start_priority is known when we first load the
  80            unit. And that value we only know from S links. Hence
  81            UP/SYSINIT must be read before DOWN */
  82 };
  83
  84 #define RUNLEVELS_UP "12345"
  85 /* #define RUNLEVELS_DOWN "06" */
  86 /* #define RUNLEVELS_BOOT "bBsS" */
  87 #endif
  88
  89 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  90         [SERVICE_DEAD] = UNIT_INACTIVE,
  91         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  92         [SERVICE_START] = UNIT_ACTIVATING,
  93         [SERVICE_START_POST] = UNIT_ACTIVATING,
  94         [SERVICE_RUNNING] = UNIT_ACTIVE,
  95         [SERVICE_EXITED] = UNIT_ACTIVE,
  96         [SERVICE_RELOAD] = UNIT_RELOADING,
  97         [SERVICE_STOP] = UNIT_DEACTIVATING,
  98         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 101         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 103         [SERVICE_FAILED] = UNIT_FAILED,
 104         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 105 };
 106
 107 static void service_init(Unit *u) {
 108         Service *s = SERVICE(u);
 109
 110         assert(u);
 111         assert(u->meta.load_state == UNIT_STUB);
 112
 113         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 114         s->restart_usec = DEFAULT_RESTART_USEC;
 115         s->timer_watch.type = WATCH_INVALID;
 116 #ifdef HAVE_SYSV_COMPAT
 117         s->sysv_start_priority = -1;
 118 #endif
 119         s->socket_fd = -1;
 120
 121         exec_context_init(&s->exec_context);
 122
 123         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 124
 125         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 126 }
 127
 128 static void service_unwatch_control_pid(Service *s) {
 129         assert(s);
 130
 131         if (s->control_pid <= 0)
 132                 return;
 133
 134         unit_unwatch_pid(UNIT(s), s->control_pid);
 135         s->control_pid = 0;
 136 }
 137
 138 static void service_unwatch_main_pid(Service *s) {
 139         assert(s);
 140
 141         if (s->main_pid <= 0)
 142                 return;
 143
 144         unit_unwatch_pid(UNIT(s), s->main_pid);
 145         s->main_pid = 0;
 146 }
 147
 148 static int service_set_main_pid(Service *s, pid_t pid) {
 149         pid_t ppid;
 150
 151         assert(s);
 152
 153         if (pid <= 1)
 154                 return -EINVAL;
 155
 156         if (pid == getpid())
 157                 return -EINVAL;
 158
 159         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 160                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 161                             s->meta.id, (unsigned long) pid);
 162
 163         s->main_pid = pid;
 164         s->main_pid_known = true;
 165
 166         exec_status_start(&s->main_exec_status, pid);
 167
 168         return 0;
 169 }
 170
 171 static void service_close_socket_fd(Service *s) {
 172         assert(s);
 173
 174         if (s->socket_fd < 0)
 175                 return;
 176
 177         close_nointr_nofail(s->socket_fd);
 178         s->socket_fd = -1;
 179 }
 180
 181 static void service_connection_unref(Service *s) {
 182         assert(s);
 183
 184         if (!s->accept_socket)
 185                 return;
 186
 187         socket_connection_unref(s->accept_socket);
 188         s->accept_socket = NULL;
 189 }
 190
 191 static void service_done(Unit *u) {
 192         Service *s = SERVICE(u);
 193
 194         assert(s);
 195
 196         free(s->pid_file);
 197         s->pid_file = NULL;
 198
 199 #ifdef HAVE_SYSV_COMPAT
 200         free(s->sysv_path);
 201         s->sysv_path = NULL;
 202
 203         free(s->sysv_runlevels);
 204         s->sysv_runlevels = NULL;
 205 #endif
 206
 207         free(s->status_text);
 208         s->status_text = NULL;
 209
 210         exec_context_done(&s->exec_context);
 211         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 212         s->control_command = NULL;
 213
 214         /* This will leak a process, but at least no memory or any of
 215          * our resources */
 216         service_unwatch_main_pid(s);
 217         service_unwatch_control_pid(s);
 218
 219         if (s->bus_name)  {
 220                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 221                 free(s->bus_name);
 222                 s->bus_name = NULL;
 223         }
 224
 225         service_close_socket_fd(s);
 226         service_connection_unref(s);
 227
 228         set_free(s->configured_sockets);
 229
 230         unit_unwatch_timer(u, &s->timer_watch);
 231 }
 232
 233 #ifdef HAVE_SYSV_COMPAT
 234 static char *sysv_translate_name(const char *name) {
 235         char *r;
 236
 237         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 238                 return NULL;
 239
 240         if (startswith(name, "boot."))
 241                 /* Drop SuSE-style boot. prefix */
 242                 strcpy(stpcpy(r, name + 5), ".service");
 243         else if (endswith(name, ".sh"))
 244                 /* Drop Debian-style .sh suffix */
 245                 strcpy(stpcpy(r, name) - 3, ".service");
 246 #ifdef TARGET_ARCH
 247         else if (startswith(name, "@"))
 248                 /* Drop Arch-style background prefix */
 249                 strcpy(stpcpy(r, name + 1), ".service");
 250 #endif
 251         else
 252                 /* Normal init scripts */
 253                 strcpy(stpcpy(r, name), ".service");
 254
 255         return r;
 256 }
 257
 258 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 259
 260         /* We silently ignore the $ prefix here. According to the LSB
 261          * spec it simply indicates whether something is a
 262          * standardized name or a distribution-specific one. Since we
 263          * just follow what already exists and do not introduce new
 264          * uses or names we don't care who introduced a new name. */
 265
 266         static const char * const table[] = {
 267                 /* LSB defined facilities */
 268                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 269                 "network",              SPECIAL_NETWORK_TARGET,
 270                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 271                 "portmap",              SPECIAL_RPCBIND_TARGET,
 272                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 273                 "syslog",               SPECIAL_SYSLOG_TARGET,
 274                 "time",                 SPECIAL_RTC_SET_TARGET,
 275
 276                 /* Debian extensions */
 277 #ifdef TARGET_DEBIAN
 278                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 279 #endif
 280                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 281                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 282
 283 #ifdef TARGET_FEDORA
 284                 /* Fedora extensions */
 285                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 286                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 287                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 288 #endif
 289
 290                 /* SuSE extensions */
 291                 "null",                 NULL
 292
 293         };
 294
 295         unsigned i;
 296         char *r;
 297         const char *n;
 298
 299         assert(name);
 300         assert(_r);
 301
 302         n = *name == '$' ? name + 1 : name;
 303
 304         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 305
 306                 if (!streq(table[i], n))
 307                         continue;
 308
 309                 if (!table[i+1])
 310                         return 0;
 311
 312                 if (!(r = strdup(table[i+1])))
 313                         return -ENOMEM;
 314
 315                 goto finish;
 316         }
 317
 318         /* If we don't know this name, fallback heuristics to figure
 319          * out whether something is a target or an service alias. */
 320
 321         if (*name == '$')
 322                 /* Facilities starting with $ are most likely targets */
 323                 r = unit_name_build(n, NULL, ".target");
 324         else if (filename && streq(name, filename))
 325                 /* Names equalling the file name of the services are redundant */
 326                 return 0;
 327         else
 328                 /* Everything else we assume to be normal service names */
 329                 r = sysv_translate_name(n);
 330
 331         if (!r)
 332                 return -ENOMEM;
 333
 334 finish:
 335
 336         if (_r)
 337                 *_r = r;
 338
 339         return 1;
 340 }
 341
 342 static int sysv_fix_order(Service *s) {
 343         Meta *other;
 344         int r;
 345
 346         assert(s);
 347
 348         if (s->sysv_start_priority < 0)
 349                 return 0;
 350
 351         /* For each pair of services where at least one lacks a LSB
 352          * header, we use the start priority value to order things. */
 353
 354         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 355                 Service *t;
 356                 UnitDependency d;
 357                 bool special_s, special_t;
 358
 359                 t = (Service*) other;
 360
 361                 if (s == t)
 362                         continue;
 363
 364                 if (t->meta.load_state != UNIT_LOADED)
 365                         continue;
 366
 367                 if (t->sysv_start_priority < 0)
 368                         continue;
 369
 370                 /* If both units have modern headers we don't care
 371                  * about the priorities */
 372                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 373                     (t->meta.fragment_path || t->sysv_has_lsb))
 374                         continue;
 375
 376                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 377                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 378
 379                 if (special_t && !special_s)
 380                         d = UNIT_AFTER;
 381                 else if (special_s && !special_t)
 382                         d = UNIT_BEFORE;
 383                 else if (t->sysv_start_priority < s->sysv_start_priority)
 384                         d = UNIT_AFTER;
 385                 else if (t->sysv_start_priority > s->sysv_start_priority)
 386                         d = UNIT_BEFORE;
 387                 else
 388                         continue;
 389
 390                 /* FIXME: Maybe we should compare the name here lexicographically? */
 391
 392                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 393                         return r;
 394         }
 395
 396         return 0;
 397 }
 398
 399 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 400         ExecCommand *c;
 401
 402         if (!(c = new0(ExecCommand, 1)))
 403                 return NULL;
 404
 405         if (!(c->path = strdup(path))) {
 406                 free(c);
 407                 return NULL;
 408         }
 409
 410         if (!(c->argv = strv_new(path, arg1, NULL))) {
 411                 free(c->path);
 412                 free(c);
 413                 return NULL;
 414         }
 415
 416         return c;
 417 }
 418
 419 static int sysv_exec_commands(Service *s) {
 420         ExecCommand *c;
 421
 422         assert(s);
 423         assert(s->sysv_path);
 424
 425         if (!(c = exec_command_new(s->sysv_path, "start")))
 426                 return -ENOMEM;
 427         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 428
 429         if (!(c = exec_command_new(s->sysv_path, "stop")))
 430                 return -ENOMEM;
 431         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 432
 433         if (!(c = exec_command_new(s->sysv_path, "reload")))
 434                 return -ENOMEM;
 435         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 436
 437         return 0;
 438 }
 439
 440 static int service_load_sysv_path(Service *s, const char *path) {
 441         FILE *f;
 442         Unit *u;
 443         unsigned line = 0;
 444         int r;
 445         enum {
 446                 NORMAL,
 447                 DESCRIPTION,
 448                 LSB,
 449                 LSB_DESCRIPTION
 450         } state = NORMAL;
 451         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 452
 453         assert(s);
 454         assert(path);
 455
 456         u = UNIT(s);
 457
 458         if (!(f = fopen(path, "re"))) {
 459                 r = errno == ENOENT ? 0 : -errno;
 460                 goto finish;
 461         }
 462
 463         free(s->sysv_path);
 464         if (!(s->sysv_path = strdup(path))) {
 465                 r = -ENOMEM;
 466                 goto finish;
 467         }
 468
 469         while (!feof(f)) {
 470                 char l[LINE_MAX], *t;
 471
 472                 if (!fgets(l, sizeof(l), f)) {
 473                         if (feof(f))
 474                                 break;
 475
 476                         r = -errno;
 477                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 478                         goto finish;
 479                 }
 480
 481                 line++;
 482
 483                 t = strstrip(l);
 484                 if (*t != '#')
 485                         continue;
 486
 487                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 488                         state = LSB;
 489                         s->sysv_has_lsb = true;
 490                         continue;
 491                 }
 492
 493                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 494                         state = NORMAL;
 495                         continue;
 496                 }
 497
 498                 t++;
 499                 t += strspn(t, WHITESPACE);
 500
 501                 if (state == NORMAL) {
 502
 503                         /* Try to parse Red Hat style chkconfig headers */
 504
 505                         if (startswith_no_case(t, "chkconfig:")) {
 506                                 int start_priority;
 507                                 char runlevels[16], *k;
 508
 509                                 state = NORMAL;
 510
 511                                 if (sscanf(t+10, "%15s %i %*i",
 512                                            runlevels,
 513                                            &start_priority) != 2) {
 514
 515                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 516                                         continue;
 517                                 }
 518
 519                                 /* A start priority gathered from the
 520                                  * symlink farms is preferred over the
 521                                  * data from the LSB header. */
 522                                 if (start_priority < 0 || start_priority > 99)
 523                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 524                                 else if (s->sysv_start_priority < 0)
 525                                         s->sysv_start_priority = start_priority;
 526
 527                                 char_array_0(runlevels);
 528                                 k = delete_chars(runlevels, WHITESPACE "-");
 529
 530                                 if (k[0]) {
 531                                         char *d;
 532
 533                                         if (!(d = strdup(k))) {
 534                                                 r = -ENOMEM;
 535                                                 goto finish;
 536                                         }
 537
 538                                         free(s->sysv_runlevels);
 539                                         s->sysv_runlevels = d;
 540                                 }
 541
 542                         } else if (startswith_no_case(t, "description:")) {
 543
 544                                 size_t k = strlen(t);
 545                                 char *d;
 546                                 const char *j;
 547
 548                                 if (t[k-1] == '\\') {
 549                                         state = DESCRIPTION;
 550                                         t[k-1] = 0;
 551                                 }
 552
 553                                 if ((j = strstrip(t+12)) && *j) {
 554                                         if (!(d = strdup(j))) {
 555                                                 r = -ENOMEM;
 556                                                 goto finish;
 557                                         }
 558                                 } else
 559                                         d = NULL;
 560
 561                                 free(chkconfig_description);
 562                                 chkconfig_description = d;
 563
 564                         } else if (startswith_no_case(t, "pidfile:")) {
 565
 566                                 char *fn;
 567
 568                                 state = NORMAL;
 569
 570                                 fn = strstrip(t+8);
 571                                 if (!path_is_absolute(fn)) {
 572                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 573                                         continue;
 574                                 }
 575
 576                                 if (!(fn = strdup(fn))) {
 577                                         r = -ENOMEM;
 578                                         goto finish;
 579                                 }
 580
 581                                 free(s->pid_file);
 582                                 s->pid_file = fn;
 583                         }
 584
 585                 } else if (state == DESCRIPTION) {
 586
 587                         /* Try to parse Red Hat style description
 588                          * continuation */
 589
 590                         size_t k = strlen(t);
 591                         char *j;
 592
 593                         if (t[k-1] == '\\')
 594                                 t[k-1] = 0;
 595                         else
 596                                 state = NORMAL;
 597
 598                         if ((j = strstrip(t)) && *j) {
 599                                 char *d = NULL;
 600
 601                                 if (chkconfig_description)
 602                                         asprintf(&d, "%s %s", chkconfig_description, j);
 603                                 else
 604                                         d = strdup(j);
 605
 606                                 if (!d) {
 607                                         r = -ENOMEM;
 608                                         goto finish;
 609                                 }
 610
 611                                 free(chkconfig_description);
 612                                 chkconfig_description = d;
 613                         }
 614
 615                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 616
 617                         if (startswith_no_case(t, "Provides:")) {
 618                                 char *i, *w;
 619                                 size_t z;
 620
 621                                 state = LSB;
 622
 623                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 624                                         char *n, *m;
 625
 626                                         if (!(n = strndup(w, z))) {
 627                                                 r = -ENOMEM;
 628                                                 goto finish;
 629                                         }
 630
 631                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 632                                         free(n);
 633
 634                                         if (r < 0)
 635                                                 goto finish;
 636
 637                                         if (r == 0)
 638                                                 continue;
 639
 640                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 641                                                 r = unit_add_name(u, m);
 642                                         else {
 643                                                 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 644
 645                                                 if (s->sysv_enabled) {
 646                                                         int k;
 647
 648                                                         if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
 649                                                                 r = k;
 650                                                 }
 651                                         }
 652
 653                                         if (r < 0)
 654                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 655
 656                                         free(m);
 657                                 }
 658
 659                         } else if (startswith_no_case(t, "Required-Start:") ||
 660                                    startswith_no_case(t, "Should-Start:") ||
 661                                    startswith_no_case(t, "X-Start-Before:") ||
 662                                    startswith_no_case(t, "X-Start-After:")) {
 663                                 char *i, *w;
 664                                 size_t z;
 665
 666                                 state = LSB;
 667
 668                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 669                                         char *n, *m;
 670
 671                                         if (!(n = strndup(w, z))) {
 672                                                 r = -ENOMEM;
 673                                                 goto finish;
 674                                         }
 675
 676                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 677                                         free(n);
 678
 679                                         if (r < 0)
 680                                                 goto finish;
 681
 682                                         if (r == 0)
 683                                                 continue;
 684
 685                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 686
 687                                         if (r < 0)
 688                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 689
 690                                         free(m);
 691                                 }
 692                         } else if (startswith_no_case(t, "Default-Start:")) {
 693                                 char *k, *d;
 694
 695                                 state = LSB;
 696
 697                                 k = delete_chars(t+14, WHITESPACE "-");
 698
 699                                 if (k[0] != 0) {
 700                                         if (!(d = strdup(k))) {
 701                                                 r = -ENOMEM;
 702                                                 goto finish;
 703                                         }
 704
 705                                         free(s->sysv_runlevels);
 706                                         s->sysv_runlevels = d;
 707                                 }
 708
 709                         } else if (startswith_no_case(t, "Description:")) {
 710                                 char *d, *j;
 711
 712                                 state = LSB_DESCRIPTION;
 713
 714                                 if ((j = strstrip(t+12)) && *j) {
 715                                         if (!(d = strdup(j))) {
 716                                                 r = -ENOMEM;
 717                                                 goto finish;
 718                                         }
 719                                 } else
 720                                         d = NULL;
 721
 722                                 free(long_description);
 723                                 long_description = d;
 724
 725                         } else if (startswith_no_case(t, "Short-Description:")) {
 726                                 char *d, *j;
 727
 728                                 state = LSB;
 729
 730                                 if ((j = strstrip(t+18)) && *j) {
 731                                         if (!(d = strdup(j))) {
 732                                                 r = -ENOMEM;
 733                                                 goto finish;
 734                                         }
 735                                 } else
 736                                         d = NULL;
 737
 738                                 free(short_description);
 739                                 short_description = d;
 740
 741                         } else if (startswith_no_case(t, "X-Interactive:")) {
 742                                 int b;
 743
 744                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 745                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 746                                         continue;
 747                                 }
 748
 749                                 if (b)
 750                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 751                                 else
 752                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 753
 754                         } else if (state == LSB_DESCRIPTION) {
 755
 756                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 757                                         char *j;
 758
 759                                         if ((j = strstrip(t)) && *j) {
 760                                                 char *d = NULL;
 761
 762                                                 if (long_description)
 763                                                         asprintf(&d, "%s %s", long_description, t);
 764                                                 else
 765                                                         d = strdup(j);
 766
 767                                                 if (!d) {
 768                                                         r = -ENOMEM;
 769                                                         goto finish;
 770                                                 }
 771
 772                                                 free(long_description);
 773                                                 long_description = d;
 774                                         }
 775
 776                                 } else
 777                                         state = LSB;
 778                         }
 779                 }
 780         }
 781
 782         if ((r = sysv_exec_commands(s)) < 0)
 783                 goto finish;
 784
 785         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 786                 /* If there a runlevels configured for this service
 787                  * but none of the standard ones, then we assume this
 788                  * is some special kind of service (which might be
 789                  * needed for early boot) and don't create any links
 790                  * to it. */
 791
 792                 s->meta.default_dependencies = false;
 793
 794                 /* Don't timeout special services during boot (like fsck) */
 795                 s->timeout_usec = 0;
 796         } else
 797                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 798
 799         /* Special setting for all SysV services */
 800         s->type = SERVICE_FORKING;
 801         s->remain_after_exit = true;
 802         s->restart = SERVICE_RESTART_NO;
 803         s->exec_context.std_output =
 804                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 805                 ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL;
 806         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 807
 808         /* We use the long description only if
 809          * no short description is set. */
 810
 811         if (short_description)
 812                 description = short_description;
 813         else if (chkconfig_description)
 814                 description = chkconfig_description;
 815         else if (long_description)
 816                 description = long_description;
 817         else
 818                 description = NULL;
 819
 820         if (description) {
 821                 char *d;
 822
 823                 if (!(d = strappend("LSB: ", description))) {
 824                         r = -ENOMEM;
 825                         goto finish;
 826                 }
 827
 828                 u->meta.description = d;
 829         }
 830
 831         u->meta.load_state = UNIT_LOADED;
 832         r = 0;
 833
 834 finish:
 835
 836         if (f)
 837                 fclose(f);
 838
 839         free(short_description);
 840         free(long_description);
 841         free(chkconfig_description);
 842
 843         return r;
 844 }
 845
 846 static int service_load_sysv_name(Service *s, const char *name) {
 847         char **p;
 848
 849         assert(s);
 850         assert(name);
 851
 852         /* For SysV services we strip the boot. or .sh
 853          * prefixes/suffixes. */
 854         if (startswith(name, "boot.") ||
 855             endswith(name, ".sh.service"))
 856                 return -ENOENT;
 857
 858         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 859                 char *path;
 860                 int r;
 861
 862                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 863                         return -ENOMEM;
 864
 865                 assert(endswith(path, ".service"));
 866                 path[strlen(path)-8] = 0;
 867
 868                 r = service_load_sysv_path(s, path);
 869
 870                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 871                         /* Try Debian style xxx.sh source'able init scripts */
 872                         strcat(path, ".sh");
 873                         r = service_load_sysv_path(s, path);
 874                 }
 875
 876                 free(path);
 877
 878                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 879                         /* Try SUSE style boot.xxx init scripts */
 880
 881                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 882                                 return -ENOMEM;
 883
 884                         path[strlen(path)-8] = 0;
 885                         r = service_load_sysv_path(s, path);
 886                         free(path);
 887                 }
 888
 889                 if (r < 0)
 890                         return r;
 891
 892                 if ((s->meta.load_state != UNIT_STUB))
 893                         break;
 894         }
 895
 896         return 0;
 897 }
 898
 899 static int service_load_sysv(Service *s) {
 900         const char *t;
 901         Iterator i;
 902         int r;
 903
 904         assert(s);
 905
 906         /* Load service data from SysV init scripts, preferably with
 907          * LSB headers ... */
 908
 909         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 910                 return 0;
 911
 912         if ((t = s->meta.id))
 913                 if ((r = service_load_sysv_name(s, t)) < 0)
 914                         return r;
 915
 916         if (s->meta.load_state == UNIT_STUB)
 917                 SET_FOREACH(t, s->meta.names, i) {
 918                         if (t == s->meta.id)
 919                                 continue;
 920
 921                         if ((r = service_load_sysv_name(s, t)) < 0)
 922                                 return r;
 923
 924                         if (s->meta.load_state != UNIT_STUB)
 925                                 break;
 926                 }
 927
 928         return 0;
 929 }
 930 #endif
 931
 932 static int service_verify(Service *s) {
 933         assert(s);
 934
 935         if (s->meta.load_state != UNIT_LOADED)
 936                 return 0;
 937
 938         if (!s->exec_command[SERVICE_EXEC_START]) {
 939                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
 940                 return -EINVAL;
 941         }
 942
 943         if (s->type != SERVICE_ONESHOT &&
 944             s->exec_command[SERVICE_EXEC_START]->command_next) {
 945                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
 946                 return -EINVAL;
 947         }
 948
 949         if (s->type == SERVICE_DBUS && !s->bus_name) {
 950                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
 951                 return -EINVAL;
 952         }
 953
 954         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 955                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 956                 return -EINVAL;
 957         }
 958
 959         return 0;
 960 }
 961
 962 static int service_add_default_dependencies(Service *s) {
 963         int r;
 964
 965         assert(s);
 966
 967         /* Add a number of automatic dependencies useful for the
 968          * majority of services. */
 969
 970         /* First, pull in base system */
 971         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
 972
 973                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 974                         return r;
 975
 976         } else if (s->meta.manager->running_as == MANAGER_SESSION) {
 977
 978                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
 979                         return r;
 980         }
 981
 982         /* Second, activate normal shutdown */
 983         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_SHUTDOWN_TARGET, NULL, true);
 984 }
 985
 986 static int service_load(Unit *u) {
 987         int r;
 988         Service *s = SERVICE(u);
 989
 990         assert(s);
 991
 992         /* Load a .service file */
 993         if ((r = unit_load_fragment(u)) < 0)
 994                 return r;
 995
 996 #ifdef HAVE_SYSV_COMPAT
 997         /* Load a classic init script as a fallback, if we couldn't find anything */
 998         if (u->meta.load_state == UNIT_STUB)
 999                 if ((r = service_load_sysv(s)) < 0)
1000                         return r;
1001 #endif
1002
1003         /* Still nothing found? Then let's give up */
1004         if (u->meta.load_state == UNIT_STUB)
1005                 return -ENOENT;
1006
1007         /* We were able to load something, then let's add in the
1008          * dropin directories. */
1009         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1010                 return r;
1011
1012         /* This is a new unit? Then let's add in some extras */
1013         if (u->meta.load_state == UNIT_LOADED) {
1014                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1015                         return r;
1016
1017                 if ((r = unit_add_default_cgroup(u)) < 0)
1018                         return r;
1019
1020 #ifdef HAVE_SYSV_COMPAT
1021                 if ((r = sysv_fix_order(s)) < 0)
1022                         return r;
1023 #endif
1024
1025                 if (s->bus_name)
1026                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1027                                 return r;
1028
1029                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1030                         s->notify_access = NOTIFY_MAIN;
1031
1032                 if (s->type == SERVICE_DBUS || s->bus_name)
1033                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1034                                 return r;
1035
1036                 if (s->meta.default_dependencies)
1037                         if ((r = service_add_default_dependencies(s)) < 0)
1038                                 return r;
1039         }
1040
1041         return service_verify(s);
1042 }
1043
1044 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1045
1046         ServiceExecCommand c;
1047         Service *s = SERVICE(u);
1048         const char *prefix2;
1049         char *p2;
1050
1051         assert(s);
1052
1053         p2 = strappend(prefix, "\t");
1054         prefix2 = p2 ? p2 : prefix;
1055
1056         fprintf(f,
1057                 "%sService State: %s\n"
1058                 "%sPermissionsStartOnly: %s\n"
1059                 "%sRootDirectoryStartOnly: %s\n"
1060                 "%sRemainAfterExit: %s\n"
1061                 "%sType: %s\n"
1062                 "%sRestart: %s\n"
1063                 "%sNotifyAccess: %s\n",
1064                 prefix, service_state_to_string(s->state),
1065                 prefix, yes_no(s->permissions_start_only),
1066                 prefix, yes_no(s->root_directory_start_only),
1067                 prefix, yes_no(s->remain_after_exit),
1068                 prefix, service_type_to_string(s->type),
1069                 prefix, service_restart_to_string(s->restart),
1070                 prefix, notify_access_to_string(s->notify_access));
1071
1072         if (s->control_pid > 0)
1073                 fprintf(f,
1074                         "%sControl PID: %lu\n",
1075                         prefix, (unsigned long) s->control_pid);
1076
1077         if (s->main_pid > 0)
1078                 fprintf(f,
1079                         "%sMain PID: %lu\n",
1080                         prefix, (unsigned long) s->main_pid);
1081
1082         if (s->pid_file)
1083                 fprintf(f,
1084                         "%sPIDFile: %s\n",
1085                         prefix, s->pid_file);
1086
1087         if (s->bus_name)
1088                 fprintf(f,
1089                         "%sBusName: %s\n"
1090                         "%sBus Name Good: %s\n",
1091                         prefix, s->bus_name,
1092                         prefix, yes_no(s->bus_name_good));
1093
1094         exec_context_dump(&s->exec_context, f, prefix);
1095
1096         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1097
1098                 if (!s->exec_command[c])
1099                         continue;
1100
1101                 fprintf(f, "%s-> %s:\n",
1102                         prefix, service_exec_command_to_string(c));
1103
1104                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1105         }
1106
1107 #ifdef HAVE_SYSV_COMPAT
1108         if (s->sysv_path)
1109                 fprintf(f,
1110                         "%sSysV Init Script Path: %s\n"
1111                         "%sSysV Init Script has LSB Header: %s\n",
1112                         prefix, s->sysv_path,
1113                         prefix, yes_no(s->sysv_has_lsb));
1114
1115         if (s->sysv_start_priority >= 0)
1116                 fprintf(f,
1117                         "%sSysVStartPriority: %i\n"
1118                         "%sSysVEnabled: %s\n",
1119                         prefix, s->sysv_start_priority,
1120                         prefix, yes_no(s->sysv_enabled));
1121
1122         if (s->sysv_runlevels)
1123                 fprintf(f, "%sSysVRunLevels: %s\n",
1124                         prefix, s->sysv_runlevels);
1125 #endif
1126
1127         if (s->status_text)
1128                 fprintf(f, "%sStatus Text: %s\n",
1129                         prefix, s->status_text);
1130
1131         free(p2);
1132 }
1133
1134 static int service_load_pid_file(Service *s) {
1135         char *k;
1136         int r;
1137         pid_t pid;
1138
1139         assert(s);
1140
1141         if (s->main_pid_known)
1142                 return 0;
1143
1144         assert(s->main_pid <= 0);
1145
1146         if (!s->pid_file)
1147                 return -ENOENT;
1148
1149         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1150                 return r;
1151
1152         r = parse_pid(k, &pid);
1153         free(k);
1154
1155         if (r < 0)
1156                 return r;
1157
1158         if (kill(pid, 0) < 0 && errno != EPERM) {
1159                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1160                             (unsigned long) pid, s->pid_file);
1161                 return -ESRCH;
1162         }
1163
1164         if ((r = service_set_main_pid(s, pid)) < 0)
1165                 return r;
1166
1167         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1168                 /* FIXME: we need to do something here */
1169                 return r;
1170
1171         return 0;
1172 }
1173
1174 static int service_get_sockets(Service *s, Set **_set) {
1175         Set *set;
1176         Iterator i;
1177         char *t;
1178         int r;
1179
1180         assert(s);
1181         assert(_set);
1182
1183         if (s->socket_fd >= 0)
1184                 return 0;
1185
1186         if (!set_isempty(s->configured_sockets))
1187                 return 0;
1188
1189         /* Collects all Socket objects that belong to this
1190          * service. Note that a service might have multiple sockets
1191          * via multiple names. */
1192
1193         if (!(set = set_new(NULL, NULL)))
1194                 return -ENOMEM;
1195
1196         SET_FOREACH(t, s->meta.names, i) {
1197                 char *k;
1198                 Unit *p;
1199
1200                 /* Look for all socket objects that go by any of our
1201                  * units and collect their fds */
1202
1203                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1204                         r = -ENOMEM;
1205                         goto fail;
1206                 }
1207
1208                 p = manager_get_unit(s->meta.manager, k);
1209                 free(k);
1210
1211                 if (!p)
1212                         continue;
1213
1214                 if ((r = set_put(set, p)) < 0)
1215                         goto fail;
1216         }
1217
1218         *_set = set;
1219         return 0;
1220
1221 fail:
1222         set_free(set);
1223         return r;
1224 }
1225
1226 static int service_notify_sockets_dead(Service *s) {
1227         Iterator i;
1228         Set *set, *free_set = NULL;
1229         Socket *sock;
1230         int r;
1231
1232         assert(s);
1233
1234         /* Notifies all our sockets when we die */
1235
1236         if (s->socket_fd >= 0)
1237                 return 0;
1238
1239         if (!set_isempty(s->configured_sockets))
1240                 set = s->configured_sockets;
1241         else {
1242                 if ((r = service_get_sockets(s, &free_set)) < 0)
1243                         return r;
1244
1245                 set = free_set;
1246         }
1247
1248         SET_FOREACH(sock, set, i)
1249                 socket_notify_service_dead(sock);
1250
1251         set_free(free_set);
1252
1253         return 0;
1254 }
1255
1256 static void service_set_state(Service *s, ServiceState state) {
1257         ServiceState old_state;
1258         assert(s);
1259
1260         old_state = s->state;
1261         s->state = state;
1262
1263         if (state != SERVICE_START_PRE &&
1264             state != SERVICE_START &&
1265             state != SERVICE_START_POST &&
1266             state != SERVICE_RELOAD &&
1267             state != SERVICE_STOP &&
1268             state != SERVICE_STOP_SIGTERM &&
1269             state != SERVICE_STOP_SIGKILL &&
1270             state != SERVICE_STOP_POST &&
1271             state != SERVICE_FINAL_SIGTERM &&
1272             state != SERVICE_FINAL_SIGKILL &&
1273             state != SERVICE_AUTO_RESTART)
1274                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1275
1276         if (state != SERVICE_START &&
1277             state != SERVICE_START_POST &&
1278             state != SERVICE_RUNNING &&
1279             state != SERVICE_RELOAD &&
1280             state != SERVICE_STOP &&
1281             state != SERVICE_STOP_SIGTERM &&
1282             state != SERVICE_STOP_SIGKILL)
1283                 service_unwatch_main_pid(s);
1284
1285         if (state != SERVICE_START_PRE &&
1286             state != SERVICE_START &&
1287             state != SERVICE_START_POST &&
1288             state != SERVICE_RELOAD &&
1289             state != SERVICE_STOP &&
1290             state != SERVICE_STOP_SIGTERM &&
1291             state != SERVICE_STOP_SIGKILL &&
1292             state != SERVICE_STOP_POST &&
1293             state != SERVICE_FINAL_SIGTERM &&
1294             state != SERVICE_FINAL_SIGKILL) {
1295                 service_unwatch_control_pid(s);
1296                 s->control_command = NULL;
1297                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1298         }
1299
1300         if (state == SERVICE_DEAD ||
1301             state == SERVICE_STOP ||
1302             state == SERVICE_STOP_SIGTERM ||
1303             state == SERVICE_STOP_SIGKILL ||
1304             state == SERVICE_STOP_POST ||
1305             state == SERVICE_FINAL_SIGTERM ||
1306             state == SERVICE_FINAL_SIGKILL ||
1307             state == SERVICE_FAILED ||
1308             state == SERVICE_AUTO_RESTART)
1309                 service_notify_sockets_dead(s);
1310
1311         if (state != SERVICE_START_PRE &&
1312             state != SERVICE_START &&
1313             state != SERVICE_START_POST &&
1314             state != SERVICE_RUNNING &&
1315             state != SERVICE_RELOAD &&
1316             state != SERVICE_STOP &&
1317             state != SERVICE_STOP_SIGTERM &&
1318             state != SERVICE_STOP_SIGKILL &&
1319             state != SERVICE_STOP_POST &&
1320             state != SERVICE_FINAL_SIGTERM &&
1321             state != SERVICE_FINAL_SIGKILL &&
1322             !(state == SERVICE_DEAD && s->meta.job)) {
1323                 service_close_socket_fd(s);
1324                 service_connection_unref(s);
1325         }
1326
1327         /* For the inactive states unit_notify() will trim the cgroup,
1328          * but for exit we have to do that ourselves... */
1329         if (state == SERVICE_EXITED)
1330                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1331
1332         if (old_state != state)
1333                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1334
1335         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1336 }
1337
1338 static int service_coldplug(Unit *u) {
1339         Service *s = SERVICE(u);
1340         int r;
1341
1342         assert(s);
1343         assert(s->state == SERVICE_DEAD);
1344
1345         if (s->deserialized_state != s->state) {
1346
1347                 if (s->deserialized_state == SERVICE_START_PRE ||
1348                     s->deserialized_state == SERVICE_START ||
1349                     s->deserialized_state == SERVICE_START_POST ||
1350                     s->deserialized_state == SERVICE_RELOAD ||
1351                     s->deserialized_state == SERVICE_STOP ||
1352                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1353                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1354                     s->deserialized_state == SERVICE_STOP_POST ||
1355                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1356                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1357                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1358
1359                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1360                                 usec_t k;
1361
1362                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1363
1364                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1365                                         return r;
1366                         }
1367                 }
1368
1369                 if ((s->deserialized_state == SERVICE_START &&
1370                      (s->type == SERVICE_FORKING ||
1371                       s->type == SERVICE_DBUS ||
1372                       s->type == SERVICE_ONESHOT ||
1373                       s->type == SERVICE_NOTIFY)) ||
1374                     s->deserialized_state == SERVICE_START_POST ||
1375                     s->deserialized_state == SERVICE_RUNNING ||
1376                     s->deserialized_state == SERVICE_RELOAD ||
1377                     s->deserialized_state == SERVICE_STOP ||
1378                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1379                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1380                         if (s->main_pid > 0)
1381                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1382                                         return r;
1383
1384                 if (s->deserialized_state == SERVICE_START_PRE ||
1385                     s->deserialized_state == SERVICE_START ||
1386                     s->deserialized_state == SERVICE_START_POST ||
1387                     s->deserialized_state == SERVICE_RELOAD ||
1388                     s->deserialized_state == SERVICE_STOP ||
1389                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1390                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1391                     s->deserialized_state == SERVICE_STOP_POST ||
1392                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1393                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1394                         if (s->control_pid > 0)
1395                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1396                                         return r;
1397
1398                 service_set_state(s, s->deserialized_state);
1399         }
1400
1401         return 0;
1402 }
1403
1404 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1405         Iterator i;
1406         int r;
1407         int *rfds = NULL;
1408         unsigned rn_fds = 0;
1409         Set *set, *free_set = NULL;
1410         Socket *sock;
1411
1412         assert(s);
1413         assert(fds);
1414         assert(n_fds);
1415
1416         if (s->socket_fd >= 0)
1417                 return 0;
1418
1419         if (!set_isempty(s->configured_sockets))
1420                 set = s->configured_sockets;
1421         else {
1422                 if ((r = service_get_sockets(s, &free_set)) < 0)
1423                         return r;
1424
1425                 set = free_set;
1426         }
1427
1428         SET_FOREACH(sock, set, i) {
1429                 int *cfds;
1430                 unsigned cn_fds;
1431
1432                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1433                         goto fail;
1434
1435                 if (!cfds)
1436                         continue;
1437
1438                 if (!rfds) {
1439                         rfds = cfds;
1440                         rn_fds = cn_fds;
1441                 } else {
1442                         int *t;
1443
1444                         if (!(t = new(int, rn_fds+cn_fds))) {
1445                                 free(cfds);
1446                                 r = -ENOMEM;
1447                                 goto fail;
1448                         }
1449
1450                         memcpy(t, rfds, rn_fds);
1451                         memcpy(t+rn_fds, cfds, cn_fds);
1452                         free(rfds);
1453                         free(cfds);
1454
1455                         rfds = t;
1456                         rn_fds = rn_fds+cn_fds;
1457                 }
1458         }
1459
1460         *fds = rfds;
1461         *n_fds = rn_fds;
1462
1463         set_free(free_set);
1464
1465         return 0;
1466
1467 fail:
1468         set_free(set);
1469         free(rfds);
1470
1471         return r;
1472 }
1473
1474 static int service_spawn(
1475                 Service *s,
1476                 ExecCommand *c,
1477                 bool timeout,
1478                 bool pass_fds,
1479                 bool apply_permissions,
1480                 bool apply_chroot,
1481                 bool apply_tty_stdin,
1482                 bool set_notify_socket,
1483                 pid_t *_pid) {
1484
1485         pid_t pid;
1486         int r;
1487         int *fds = NULL, *fdsbuf = NULL;
1488         unsigned n_fds = 0, n_env = 0;
1489         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1490
1491         assert(s);
1492         assert(c);
1493         assert(_pid);
1494
1495         if (pass_fds ||
1496             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1497             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1498             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1499
1500                 if (s->socket_fd >= 0) {
1501                         fds = &s->socket_fd;
1502                         n_fds = 1;
1503                 } else {
1504                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1505                                 goto fail;
1506
1507                         fds = fdsbuf;
1508                 }
1509         }
1510
1511         if (timeout && s->timeout_usec) {
1512                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1513                         goto fail;
1514         } else
1515                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1516
1517         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1518                 r = -ENOMEM;
1519                 goto fail;
1520         }
1521
1522         if (!(our_env = new0(char*, 3))) {
1523                 r = -ENOMEM;
1524                 goto fail;
1525         }
1526
1527         if (set_notify_socket)
1528                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1529                         r = -ENOMEM;
1530                         goto fail;
1531                 }
1532
1533         if (s->main_pid > 0)
1534                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1535                         r = -ENOMEM;
1536                         goto fail;
1537                 }
1538
1539         if (!(final_env = strv_env_merge(2,
1540                                          s->meta.manager->environment,
1541                                          our_env,
1542                                          NULL))) {
1543                 r = -ENOMEM;
1544                 goto fail;
1545         }
1546
1547         r = exec_spawn(c,
1548                        argv,
1549                        &s->exec_context,
1550                        fds, n_fds,
1551                        final_env,
1552                        apply_permissions,
1553                        apply_chroot,
1554                        apply_tty_stdin,
1555                        s->meta.manager->confirm_spawn,
1556                        s->meta.cgroup_bondings,
1557                        &pid);
1558
1559         if (r < 0)
1560                 goto fail;
1561
1562
1563         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1564                 /* FIXME: we need to do something here */
1565                 goto fail;
1566
1567         free(fdsbuf);
1568         strv_free(argv);
1569         strv_free(our_env);
1570         strv_free(final_env);
1571
1572         *_pid = pid;
1573
1574         return 0;
1575
1576 fail:
1577         free(fdsbuf);
1578         strv_free(argv);
1579         strv_free(our_env);
1580         strv_free(final_env);
1581
1582         if (timeout)
1583                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1584
1585         return r;
1586 }
1587
1588 static int main_pid_good(Service *s) {
1589         assert(s);
1590
1591         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1592          * don't know */
1593
1594         /* If we know the pid file, then lets just check if it is
1595          * still valid */
1596         if (s->main_pid_known)
1597                 return s->main_pid > 0;
1598
1599         /* We don't know the pid */
1600         return -EAGAIN;
1601 }
1602
1603 static int control_pid_good(Service *s) {
1604         assert(s);
1605
1606         return s->control_pid > 0;
1607 }
1608
1609 static int cgroup_good(Service *s) {
1610         int r;
1611
1612         assert(s);
1613
1614         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1615                 return r;
1616
1617         return !r;
1618 }
1619
1620 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1621         int r;
1622         assert(s);
1623
1624         if (!success)
1625                 s->failure = true;
1626
1627         if (allow_restart &&
1628             !s->forbid_restart &&
1629             (s->restart == SERVICE_RESTART_ALWAYS ||
1630              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1631              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1632              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1633               (s->main_exec_status.code == CLD_KILLED ||
1634                s->main_exec_status.code == CLD_DUMPED)))) {
1635
1636                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1637                         goto fail;
1638
1639                 service_set_state(s, SERVICE_AUTO_RESTART);
1640         } else
1641                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1642
1643         s->forbid_restart = false;
1644
1645         return;
1646
1647 fail:
1648         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1649         service_enter_dead(s, false, false);
1650 }
1651
1652 static void service_enter_signal(Service *s, ServiceState state, bool success);
1653
1654 static void service_enter_stop_post(Service *s, bool success) {
1655         int r;
1656         assert(s);
1657
1658         if (!success)
1659                 s->failure = true;
1660
1661         service_unwatch_control_pid(s);
1662
1663         s->control_command_id = SERVICE_EXEC_STOP_POST;
1664         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1665                 if ((r = service_spawn(s,
1666                                        s->control_command,
1667                                        true,
1668                                        false,
1669                                        !s->permissions_start_only,
1670                                        !s->root_directory_start_only,
1671                                        true,
1672                                        false,
1673                                        &s->control_pid)) < 0)
1674                         goto fail;
1675
1676
1677                 service_set_state(s, SERVICE_STOP_POST);
1678         } else
1679                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1680
1681         return;
1682
1683 fail:
1684         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1685         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1686 }
1687
1688 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1689         int r;
1690         Set *pid_set = NULL;
1691         bool wait_for_exit = false;
1692
1693         assert(s);
1694
1695         if (!success)
1696                 s->failure = true;
1697
1698         if (s->exec_context.kill_mode != KILL_NONE) {
1699                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1700
1701                 if (s->main_pid > 0) {
1702                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1703                                  -s->main_pid :
1704                                  s->main_pid, sig) < 0 && errno != ESRCH)
1705
1706                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1707                         else
1708                                 wait_for_exit = true;
1709                 }
1710
1711                 if (s->control_pid > 0) {
1712                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1713                                  -s->control_pid :
1714                                  s->control_pid, sig) < 0 && errno != ESRCH)
1715
1716                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1717                         else
1718                                 wait_for_exit = true;
1719                 }
1720
1721                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1722
1723                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1724                                 r = -ENOMEM;
1725                                 goto fail;
1726                         }
1727
1728                         /* Exclude the main/control pids from being killed via the cgroup */
1729                         if (s->main_pid > 0)
1730                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1731                                         goto fail;
1732
1733                         if (s->control_pid > 0)
1734                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1735                                         goto fail;
1736
1737                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1738                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1739                                         log_warning("Failed to kill control group: %s", strerror(-r));
1740                         } else if (r > 0)
1741                                 wait_for_exit = true;
1742
1743                         set_free(pid_set);
1744                 }
1745         }
1746
1747         if (wait_for_exit) {
1748                 if (s->timeout_usec > 0)
1749                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1750                                 goto fail;
1751
1752                 service_set_state(s, state);
1753         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1754                 service_enter_stop_post(s, true);
1755         else
1756                 service_enter_dead(s, true, true);
1757
1758         return;
1759
1760 fail:
1761         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1762
1763         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1764                 service_enter_stop_post(s, false);
1765         else
1766                 service_enter_dead(s, false, true);
1767
1768         if (pid_set)
1769                 set_free(pid_set);
1770 }
1771
1772 static void service_enter_stop(Service *s, bool success) {
1773         int r;
1774
1775         assert(s);
1776
1777         if (!success)
1778                 s->failure = true;
1779
1780         service_unwatch_control_pid(s);
1781
1782         s->control_command_id = SERVICE_EXEC_STOP;
1783         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1784                 if ((r = service_spawn(s,
1785                                        s->control_command,
1786                                        true,
1787                                        false,
1788                                        !s->permissions_start_only,
1789                                        !s->root_directory_start_only,
1790                                        false,
1791                                        false,
1792                                        &s->control_pid)) < 0)
1793                         goto fail;
1794
1795                 service_set_state(s, SERVICE_STOP);
1796         } else
1797                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1798
1799         return;
1800
1801 fail:
1802         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1803         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1804 }
1805
1806 static void service_enter_running(Service *s, bool success) {
1807         int main_pid_ok, cgroup_ok;
1808         assert(s);
1809
1810         if (!success)
1811                 s->failure = true;
1812
1813         main_pid_ok = main_pid_good(s);
1814         cgroup_ok = cgroup_good(s);
1815
1816         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1817             (s->bus_name_good || s->type != SERVICE_DBUS))
1818                 service_set_state(s, SERVICE_RUNNING);
1819         else if (s->remain_after_exit)
1820                 service_set_state(s, SERVICE_EXITED);
1821         else
1822                 service_enter_stop(s, true);
1823 }
1824
1825 static void service_enter_start_post(Service *s) {
1826         int r;
1827         assert(s);
1828
1829         service_unwatch_control_pid(s);
1830
1831         s->control_command_id = SERVICE_EXEC_START_POST;
1832         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1833                 if ((r = service_spawn(s,
1834                                        s->control_command,
1835                                        true,
1836                                        false,
1837                                        !s->permissions_start_only,
1838                                        !s->root_directory_start_only,
1839                                        false,
1840                                        false,
1841                                        &s->control_pid)) < 0)
1842                         goto fail;
1843
1844                 service_set_state(s, SERVICE_START_POST);
1845         } else
1846                 service_enter_running(s, true);
1847
1848         return;
1849
1850 fail:
1851         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1852         service_enter_stop(s, false);
1853 }
1854
1855 static void service_enter_start(Service *s) {
1856         pid_t pid;
1857         int r;
1858
1859         assert(s);
1860
1861         assert(s->exec_command[SERVICE_EXEC_START]);
1862         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1863
1864         if (s->type == SERVICE_FORKING)
1865                 service_unwatch_control_pid(s);
1866         else
1867                 service_unwatch_main_pid(s);
1868
1869         s->control_command_id = SERVICE_EXEC_START;
1870         s->control_command = s->exec_command[SERVICE_EXEC_START];
1871
1872         if ((r = service_spawn(s,
1873                                s->control_command,
1874                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1875                                true,
1876                                true,
1877                                true,
1878                                true,
1879                                s->notify_access != NOTIFY_NONE,
1880                                &pid)) < 0)
1881                 goto fail;
1882
1883         if (s->type == SERVICE_SIMPLE) {
1884                 /* For simple services we immediately start
1885                  * the START_POST binaries. */
1886
1887                 service_set_main_pid(s, pid);
1888                 service_enter_start_post(s);
1889
1890         } else  if (s->type == SERVICE_FORKING) {
1891
1892                 /* For forking services we wait until the start
1893                  * process exited. */
1894
1895                 s->control_pid = pid;
1896                 service_set_state(s, SERVICE_START);
1897
1898         } else if (s->type == SERVICE_ONESHOT ||
1899                    s->type == SERVICE_DBUS ||
1900                    s->type == SERVICE_NOTIFY) {
1901
1902                 /* For oneshot services we wait until the start
1903                  * process exited, too, but it is our main process. */
1904
1905                 /* For D-Bus services we know the main pid right away,
1906                  * but wait for the bus name to appear on the
1907                  * bus. Notify services are similar. */
1908
1909                 service_set_main_pid(s, pid);
1910                 service_set_state(s, SERVICE_START);
1911         } else
1912                 assert_not_reached("Unknown service type");
1913
1914         return;
1915
1916 fail:
1917         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
1918         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1919 }
1920
1921 static void service_enter_start_pre(Service *s) {
1922         int r;
1923
1924         assert(s);
1925
1926         service_unwatch_control_pid(s);
1927
1928         s->control_command_id = SERVICE_EXEC_START_PRE;
1929         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1930                 if ((r = service_spawn(s,
1931                                        s->control_command,
1932                                        true,
1933                                        false,
1934                                        !s->permissions_start_only,
1935                                        !s->root_directory_start_only,
1936                                        true,
1937                                        false,
1938                                        &s->control_pid)) < 0)
1939                         goto fail;
1940
1941                 service_set_state(s, SERVICE_START_PRE);
1942         } else
1943                 service_enter_start(s);
1944
1945         return;
1946
1947 fail:
1948         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1949         service_enter_dead(s, false, true);
1950 }
1951
1952 static void service_enter_restart(Service *s) {
1953         int r;
1954         DBusError error;
1955
1956         assert(s);
1957         dbus_error_init(&error);
1958
1959         service_enter_dead(s, true, false);
1960
1961         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
1962                 goto fail;
1963
1964         log_debug("%s scheduled restart job.", s->meta.id);
1965         return;
1966
1967 fail:
1968         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
1969         service_enter_dead(s, false, false);
1970
1971         dbus_error_free(&error);
1972 }
1973
1974 static void service_enter_reload(Service *s) {
1975         int r;
1976
1977         assert(s);
1978
1979         service_unwatch_control_pid(s);
1980
1981         s->control_command_id = SERVICE_EXEC_RELOAD;
1982         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1983                 if ((r = service_spawn(s,
1984                                        s->control_command,
1985                                        true,
1986                                        false,
1987                                        !s->permissions_start_only,
1988                                        !s->root_directory_start_only,
1989                                        false,
1990                                        false,
1991                                        &s->control_pid)) < 0)
1992                         goto fail;
1993
1994                 service_set_state(s, SERVICE_RELOAD);
1995         } else
1996                 service_enter_running(s, true);
1997
1998         return;
1999
2000 fail:
2001         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2002         service_enter_stop(s, false);
2003 }
2004
2005 static void service_run_next_control(Service *s, bool success) {
2006         int r;
2007
2008         assert(s);
2009         assert(s->control_command);
2010         assert(s->control_command->command_next);
2011
2012         if (!success)
2013                 s->failure = true;
2014
2015         assert(s->control_command_id != SERVICE_EXEC_START);
2016
2017         s->control_command = s->control_command->command_next;
2018         service_unwatch_control_pid(s);
2019
2020         if ((r = service_spawn(s,
2021                                s->control_command,
2022                                true,
2023                                false,
2024                                !s->permissions_start_only,
2025                                !s->root_directory_start_only,
2026                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2027                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2028                                false,
2029                                &s->control_pid)) < 0)
2030                 goto fail;
2031
2032         return;
2033
2034 fail:
2035         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2036
2037         if (s->state == SERVICE_START_PRE)
2038                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2039         else if (s->state == SERVICE_STOP)
2040                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2041         else if (s->state == SERVICE_STOP_POST)
2042                 service_enter_dead(s, false, true);
2043         else
2044                 service_enter_stop(s, false);
2045 }
2046
2047 static void service_run_next_main(Service *s, bool success) {
2048         pid_t pid;
2049         int r;
2050
2051         assert(s);
2052         assert(s->control_command);
2053         assert(s->control_command->command_next);
2054
2055         if (!success)
2056                 s->failure = true;
2057
2058         assert(s->control_command_id == SERVICE_EXEC_START);
2059         assert(s->type == SERVICE_ONESHOT);
2060
2061         s->control_command = s->control_command->command_next;
2062         service_unwatch_main_pid(s);
2063
2064         if ((r = service_spawn(s,
2065                                s->control_command,
2066                                false,
2067                                true,
2068                                true,
2069                                true,
2070                                true,
2071                                s->notify_access != NOTIFY_NONE,
2072                                &pid)) < 0)
2073                 goto fail;
2074
2075         service_set_main_pid(s, pid);
2076
2077         return;
2078
2079 fail:
2080         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2081         service_enter_stop(s, false);
2082 }
2083
2084 static int service_start(Unit *u) {
2085         Service *s = SERVICE(u);
2086
2087         assert(s);
2088
2089         /* We cannot fulfill this request right now, try again later
2090          * please! */
2091         if (s->state == SERVICE_STOP ||
2092             s->state == SERVICE_STOP_SIGTERM ||
2093             s->state == SERVICE_STOP_SIGKILL ||
2094             s->state == SERVICE_STOP_POST ||
2095             s->state == SERVICE_FINAL_SIGTERM ||
2096             s->state == SERVICE_FINAL_SIGKILL)
2097                 return -EAGAIN;
2098
2099         /* Already on it! */
2100         if (s->state == SERVICE_START_PRE ||
2101             s->state == SERVICE_START ||
2102             s->state == SERVICE_START_POST)
2103                 return 0;
2104
2105         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2106
2107         /* Make sure we don't enter a busy loop of some kind. */
2108         if (!ratelimit_test(&s->ratelimit)) {
2109                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2110                 return -ECANCELED;
2111         }
2112
2113         s->failure = false;
2114         s->main_pid_known = false;
2115         s->forbid_restart = false;
2116
2117         service_enter_start_pre(s);
2118         return 0;
2119 }
2120
2121 static int service_stop(Unit *u) {
2122         Service *s = SERVICE(u);
2123
2124         assert(s);
2125
2126         /* This is a user request, so don't do restarts on this
2127          * shutdown. */
2128         s->forbid_restart = true;
2129
2130         /* Already on it */
2131         if (s->state == SERVICE_STOP ||
2132             s->state == SERVICE_STOP_SIGTERM ||
2133             s->state == SERVICE_STOP_SIGKILL ||
2134             s->state == SERVICE_STOP_POST ||
2135             s->state == SERVICE_FINAL_SIGTERM ||
2136             s->state == SERVICE_FINAL_SIGKILL)
2137                 return 0;
2138
2139         /* Don't allow a restart */
2140         if (s->state == SERVICE_AUTO_RESTART) {
2141                 service_set_state(s, SERVICE_DEAD);
2142                 return 0;
2143         }
2144
2145         /* If there's already something running we go directly into
2146          * kill mode. */
2147         if (s->state == SERVICE_START_PRE ||
2148             s->state == SERVICE_START ||
2149             s->state == SERVICE_START_POST ||
2150             s->state == SERVICE_RELOAD) {
2151                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2152                 return 0;
2153         }
2154
2155         assert(s->state == SERVICE_RUNNING ||
2156                s->state == SERVICE_EXITED);
2157
2158         service_enter_stop(s, true);
2159         return 0;
2160 }
2161
2162 static int service_reload(Unit *u) {
2163         Service *s = SERVICE(u);
2164
2165         assert(s);
2166
2167         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2168
2169         service_enter_reload(s);
2170         return 0;
2171 }
2172
2173 static bool service_can_reload(Unit *u) {
2174         Service *s = SERVICE(u);
2175
2176         assert(s);
2177
2178         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2179 }
2180
2181 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2182         Service *s = SERVICE(u);
2183
2184         assert(u);
2185         assert(f);
2186         assert(fds);
2187
2188         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2189         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2190
2191         if (s->control_pid > 0)
2192                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2193
2194         if (s->main_pid_known && s->main_pid > 0)
2195                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2196
2197         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2198
2199         if (s->status_text)
2200                 unit_serialize_item(u, f, "status-text", s->status_text);
2201
2202         /* There's a minor uncleanliness here: if there are multiple
2203          * commands attached here, we will start from the first one
2204          * again */
2205         if (s->control_command_id >= 0)
2206                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2207
2208         if (s->socket_fd >= 0) {
2209                 int copy;
2210
2211                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2212                         return copy;
2213
2214                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2215         }
2216
2217         if (s->main_exec_status.pid > 0) {
2218                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2219
2220                 if (s->main_exec_status.start_timestamp.realtime > 0) {
2221                         unit_serialize_item_format(u, f, "main-exec-status-start-realtime",
2222                                                    "%llu", (unsigned long long) s->main_exec_status.start_timestamp.realtime);
2223
2224                         unit_serialize_item_format(u, f, "main-exec-status-start-monotonic",
2225                                                    "%llu", (unsigned long long) s->main_exec_status.start_timestamp.monotonic);
2226                 }
2227
2228                 if (s->main_exec_status.exit_timestamp.realtime > 0) {
2229                         unit_serialize_item_format(u, f, "main-exec-status-exit-realtime",
2230                                                    "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.realtime);
2231                         unit_serialize_item_format(u, f, "main-exec-status-exit-monotonic",
2232                                                    "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.monotonic);
2233
2234                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2235                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2236                 }
2237         }
2238
2239         return 0;
2240 }
2241
2242 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2243         Service *s = SERVICE(u);
2244
2245         assert(u);
2246         assert(key);
2247         assert(value);
2248         assert(fds);
2249
2250         if (streq(key, "state")) {
2251                 ServiceState state;
2252
2253                 if ((state = service_state_from_string(value)) < 0)
2254                         log_debug("Failed to parse state value %s", value);
2255                 else
2256                         s->deserialized_state = state;
2257         } else if (streq(key, "failure")) {
2258                 int b;
2259
2260                 if ((b = parse_boolean(value)) < 0)
2261                         log_debug("Failed to parse failure value %s", value);
2262                 else
2263                         s->failure = b || s->failure;
2264         } else if (streq(key, "control-pid")) {
2265                 pid_t pid;
2266
2267                 if (parse_pid(value, &pid) < 0)
2268                         log_debug("Failed to parse control-pid value %s", value);
2269                 else
2270                         s->control_pid = pid;
2271         } else if (streq(key, "main-pid")) {
2272                 pid_t pid;
2273
2274                 if (parse_pid(value, &pid) < 0)
2275                         log_debug("Failed to parse main-pid value %s", value);
2276                 else
2277                         service_set_main_pid(s, (pid_t) pid);
2278         } else if (streq(key, "main-pid-known")) {
2279                 int b;
2280
2281                 if ((b = parse_boolean(value)) < 0)
2282                         log_debug("Failed to parse main-pid-known value %s", value);
2283                 else
2284                         s->main_pid_known = b;
2285         } else if (streq(key, "status-text")) {
2286                 char *t;
2287
2288                 if ((t = strdup(value))) {
2289                         free(s->status_text);
2290                         s->status_text = t;
2291                 }
2292
2293         } else if (streq(key, "control-command")) {
2294                 ServiceExecCommand id;
2295
2296                 if ((id = service_exec_command_from_string(value)) < 0)
2297                         log_debug("Failed to parse exec-command value %s", value);
2298                 else {
2299                         s->control_command_id = id;
2300                         s->control_command = s->exec_command[id];
2301                 }
2302         } else if (streq(key, "socket-fd")) {
2303                 int fd;
2304
2305                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2306                         log_debug("Failed to parse socket-fd value %s", value);
2307                 else {
2308
2309                         if (s->socket_fd >= 0)
2310                                 close_nointr_nofail(s->socket_fd);
2311                         s->socket_fd = fdset_remove(fds, fd);
2312                 }
2313         } else if (streq(key, "main-exec-status-pid")) {
2314                 pid_t pid;
2315
2316                 if (parse_pid(value, &pid) < 0)
2317                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2318                 else
2319                         s->main_exec_status.pid = pid;
2320         } else if (streq(key, "main-exec-status-code")) {
2321                 int i;
2322
2323                 if (safe_atoi(value, &i) < 0)
2324                         log_debug("Failed to parse main-exec-status-code value %s", value);
2325                 else
2326                         s->main_exec_status.code = i;
2327         } else if (streq(key, "main-exec-status-status")) {
2328                 int i;
2329
2330                 if (safe_atoi(value, &i) < 0)
2331                         log_debug("Failed to parse main-exec-status-status value %s", value);
2332                 else
2333                         s->main_exec_status.status = i;
2334         } else if (streq(key, "main-exec-status-start-realtime")) {
2335                 uint64_t k;
2336
2337                 if (safe_atou64(value, &k) < 0)
2338                         log_debug("Failed to parse main-exec-status-start-realtime value %s", value);
2339                 else
2340                         s->main_exec_status.start_timestamp.realtime = (usec_t) k;
2341         } else if (streq(key, "main-exec-status-start-monotonic")) {
2342                 uint64_t k;
2343
2344                 if (safe_atou64(value, &k) < 0)
2345                         log_debug("Failed to parse main-exec-status-start-monotonic value %s", value);
2346                 else
2347                         s->main_exec_status.start_timestamp.monotonic = (usec_t) k;
2348         } else if (streq(key, "main-exec-status-exit-realtime")) {
2349                 uint64_t k;
2350
2351                 if (safe_atou64(value, &k) < 0)
2352                         log_debug("Failed to parse main-exec-status-exit-realtime value %s", value);
2353                 else
2354                         s->main_exec_status.exit_timestamp.realtime = (usec_t) k;
2355         } else if (streq(key, "main-exec-status-exit-monotonic")) {
2356                 uint64_t k;
2357
2358                 if (safe_atou64(value, &k) < 0)
2359                         log_debug("Failed to parse main-exec-status-exit-monotonic value %s", value);
2360                 else
2361                         s->main_exec_status.exit_timestamp.monotonic = (usec_t) k;
2362         } else
2363                 log_debug("Unknown serialization key '%s'", key);
2364
2365         return 0;
2366 }
2367
2368 static UnitActiveState service_active_state(Unit *u) {
2369         assert(u);
2370
2371         return state_translation_table[SERVICE(u)->state];
2372 }
2373
2374 static const char *service_sub_state_to_string(Unit *u) {
2375         assert(u);
2376
2377         return service_state_to_string(SERVICE(u)->state);
2378 }
2379
2380 #ifdef HAVE_SYSV_COMPAT
2381 static bool service_check_gc(Unit *u) {
2382         Service *s = SERVICE(u);
2383
2384         assert(s);
2385
2386         return !!s->sysv_path;
2387 }
2388 #endif
2389
2390 static bool service_check_snapshot(Unit *u) {
2391         Service *s = SERVICE(u);
2392
2393         assert(s);
2394
2395         return !s->got_socket_fd;
2396 }
2397
2398 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2399         Service *s = SERVICE(u);
2400         bool success;
2401
2402         assert(s);
2403         assert(pid >= 0);
2404
2405         if (!s->meta.fragment_path)
2406                 success = is_clean_exit_lsb(code, status);
2407         else
2408                 success = is_clean_exit(code, status);
2409
2410         if (s->main_pid == pid) {
2411
2412                 s->main_pid = 0;
2413                 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2414
2415                 if (s->type != SERVICE_FORKING && s->control_command) {
2416                         s->control_command->exec_status = s->main_exec_status;
2417
2418                         if (s->control_command->ignore)
2419                                 success = true;
2420                 }
2421
2422                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2423                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2424                 s->failure = s->failure || !success;
2425
2426                 if (s->control_command &&
2427                     s->control_command->command_next &&
2428                     success) {
2429
2430                         /* There is another command to *
2431                          * execute, so let's do that. */
2432
2433                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2434                         service_run_next_main(s, success);
2435
2436                 } else {
2437
2438                         /* The service exited, so the service is officially
2439                          * gone. */
2440
2441                         s->control_command = NULL;
2442                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2443
2444                         switch (s->state) {
2445
2446                         case SERVICE_START_POST:
2447                         case SERVICE_RELOAD:
2448                         case SERVICE_STOP:
2449                                 /* Need to wait until the operation is
2450                                  * done */
2451                                 break;
2452
2453                         case SERVICE_START:
2454                                 if (s->type == SERVICE_ONESHOT) {
2455                                         /* This was our main goal, so let's go on */
2456                                         if (success)
2457                                                 service_enter_start_post(s);
2458                                         else
2459                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2460                                         break;
2461                                 } else {
2462                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2463
2464                                         /* Fall through */
2465                                 }
2466
2467                         case SERVICE_RUNNING:
2468                                 service_enter_running(s, success);
2469                                 break;
2470
2471                         case SERVICE_STOP_SIGTERM:
2472                         case SERVICE_STOP_SIGKILL:
2473
2474                                 if (!control_pid_good(s))
2475                                         service_enter_stop_post(s, success);
2476
2477                                 /* If there is still a control process, wait for that first */
2478                                 break;
2479
2480                         default:
2481                                 assert_not_reached("Uh, main process died at wrong time.");
2482                         }
2483                 }
2484
2485         } else if (s->control_pid == pid) {
2486
2487                 s->control_pid = 0;
2488
2489                 if (s->control_command) {
2490                         exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2491
2492                         if (s->control_command->ignore)
2493                                 success = true;
2494                 }
2495
2496                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2497                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2498                 s->failure = s->failure || !success;
2499
2500                 if (s->control_command &&
2501                     s->control_command->command_next &&
2502                     success) {
2503
2504                         /* There is another command to *
2505                          * execute, so let's do that. */
2506
2507                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2508                         service_run_next_control(s, success);
2509
2510                 } else {
2511                         /* No further commands for this step, so let's
2512                          * figure out what to do next */
2513
2514                         s->control_command = NULL;
2515                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2516
2517                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2518
2519                         switch (s->state) {
2520
2521                         case SERVICE_START_PRE:
2522                                 if (success)
2523                                         service_enter_start(s);
2524                                 else
2525                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2526                                 break;
2527
2528                         case SERVICE_START:
2529                                 assert(s->type == SERVICE_FORKING);
2530
2531                                 /* Let's try to load the pid
2532                                  * file here if we can. We
2533                                  * ignore the return value,
2534                                  * since the PID file might
2535                                  * actually be created by a
2536                                  * START_POST script */
2537
2538                                 if (success) {
2539                                         if (s->pid_file)
2540                                                 service_load_pid_file(s);
2541
2542                                         service_enter_start_post(s);
2543                                 } else
2544                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2545
2546                                 break;
2547
2548                         case SERVICE_START_POST:
2549                                 if (success && s->pid_file && !s->main_pid_known) {
2550                                         int r;
2551
2552                                         /* Hmm, let's see if we can
2553                                          * load the pid now after the
2554                                          * start-post scripts got
2555                                          * executed. */
2556
2557                                         if ((r = service_load_pid_file(s)) < 0)
2558                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2559                                 }
2560
2561                                 /* Fall through */
2562
2563                         case SERVICE_RELOAD:
2564                                 if (success)
2565                                         service_enter_running(s, true);
2566                                 else
2567                                         service_enter_stop(s, false);
2568
2569                                 break;
2570
2571                         case SERVICE_STOP:
2572                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2573                                 break;
2574
2575                         case SERVICE_STOP_SIGTERM:
2576                         case SERVICE_STOP_SIGKILL:
2577                                 if (main_pid_good(s) <= 0)
2578                                         service_enter_stop_post(s, success);
2579
2580                                 /* If there is still a service
2581                                  * process around, wait until
2582                                  * that one quit, too */
2583                                 break;
2584
2585                         case SERVICE_STOP_POST:
2586                         case SERVICE_FINAL_SIGTERM:
2587                         case SERVICE_FINAL_SIGKILL:
2588                                 service_enter_dead(s, success, true);
2589                                 break;
2590
2591                         default:
2592                                 assert_not_reached("Uh, control process died at wrong time.");
2593                         }
2594                 }
2595         }
2596
2597         /* Notify clients about changed exit status */
2598         unit_add_to_dbus_queue(u);
2599 }
2600
2601 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2602         Service *s = SERVICE(u);
2603
2604         assert(s);
2605         assert(elapsed == 1);
2606
2607         assert(w == &s->timer_watch);
2608
2609         switch (s->state) {
2610
2611         case SERVICE_START_PRE:
2612         case SERVICE_START:
2613                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2614                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2615                 break;
2616
2617         case SERVICE_START_POST:
2618         case SERVICE_RELOAD:
2619                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2620                 service_enter_stop(s, false);
2621                 break;
2622
2623         case SERVICE_STOP:
2624                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2625                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2626                 break;
2627
2628         case SERVICE_STOP_SIGTERM:
2629                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2630                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2631                 break;
2632
2633         case SERVICE_STOP_SIGKILL:
2634                 /* Uh, wie sent a SIGKILL and it is still not gone?
2635                  * Must be something we cannot kill, so let's just be
2636                  * weirded out and continue */
2637
2638                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2639                 service_enter_stop_post(s, false);
2640                 break;
2641
2642         case SERVICE_STOP_POST:
2643                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2644                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2645                 break;
2646
2647         case SERVICE_FINAL_SIGTERM:
2648                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2649                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2650                 break;
2651
2652         case SERVICE_FINAL_SIGKILL:
2653                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2654                 service_enter_dead(s, false, true);
2655                 break;
2656
2657         case SERVICE_AUTO_RESTART:
2658                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2659                 service_enter_restart(s);
2660                 break;
2661
2662         default:
2663                 assert_not_reached("Timeout at wrong time.");
2664         }
2665 }
2666
2667 static void service_cgroup_notify_event(Unit *u) {
2668         Service *s = SERVICE(u);
2669
2670         assert(u);
2671
2672         log_debug("%s: cgroup is empty", u->meta.id);
2673
2674         switch (s->state) {
2675
2676                 /* Waiting for SIGCHLD is usually more interesting,
2677                  * because it includes return codes/signals. Which is
2678                  * why we ignore the cgroup events for most cases,
2679                  * except when we don't know pid which to expect the
2680                  * SIGCHLD for. */
2681
2682         case SERVICE_RUNNING:
2683                 service_enter_running(s, true);
2684                 break;
2685
2686         case SERVICE_STOP_SIGTERM:
2687         case SERVICE_STOP_SIGKILL:
2688                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2689                         service_enter_stop_post(s, true);
2690
2691                 break;
2692
2693         case SERVICE_FINAL_SIGTERM:
2694         case SERVICE_FINAL_SIGKILL:
2695                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2696                         service_enter_dead(s, true, true);
2697
2698                 break;
2699
2700         default:
2701                 ;
2702         }
2703 }
2704
2705 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2706         Service *s = SERVICE(u);
2707         const char *e;
2708
2709         assert(u);
2710
2711         if (s->notify_access == NOTIFY_NONE) {
2712                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2713                             u->meta.id, (unsigned long) pid);
2714                 return;
2715         }
2716
2717         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2718                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2719                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2720                 return;
2721         }
2722
2723         log_debug("%s: Got message", u->meta.id);
2724
2725         /* Interpret MAINPID= */
2726         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2727             (s->state == SERVICE_START ||
2728              s->state == SERVICE_START_POST ||
2729              s->state == SERVICE_RUNNING ||
2730              s->state == SERVICE_RELOAD)) {
2731
2732                 if (parse_pid(e + 8, &pid) < 0)
2733                         log_warning("Failed to parse notification message %s", e);
2734                 else {
2735                         log_debug("%s: got %s", u->meta.id, e);
2736                         service_set_main_pid(s, pid);
2737                 }
2738         }
2739
2740         /* Interpret READY= */
2741         if (s->type == SERVICE_NOTIFY &&
2742             s->state == SERVICE_START &&
2743             strv_find(tags, "READY=1")) {
2744                 log_debug("%s: got READY=1", u->meta.id);
2745
2746                 service_enter_start_post(s);
2747         }
2748
2749         /* Interpret STATUS= */
2750         if ((e = strv_find_prefix(tags, "STATUS="))) {
2751                 char *t;
2752
2753                 if (e[7]) {
2754                         if (!(t = strdup(e+7))) {
2755                                 log_error("Failed to allocate string.");
2756                                 return;
2757                         }
2758
2759                         log_debug("%s: got %s", u->meta.id, e);
2760
2761                         free(s->status_text);
2762                         s->status_text = t;
2763                 } else {
2764                         free(s->status_text);
2765                         s->status_text = NULL;
2766                 }
2767
2768         }
2769
2770         /* Notify clients about changed status or main pid */
2771         unit_add_to_dbus_queue(u);
2772 }
2773
2774 #ifdef HAVE_SYSV_COMPAT
2775 static int service_enumerate(Manager *m) {
2776         char **p;
2777         unsigned i;
2778         DIR *d = NULL;
2779         char *path = NULL, *fpath = NULL, *name = NULL;
2780         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2781         Unit *service;
2782         Iterator j;
2783         int r;
2784 #ifdef TARGET_ARCH
2785         Unit *previous = NULL;
2786         char *arch_daemons = NULL;
2787         char *arch_daemons_stripped = NULL;
2788         char **arch_daemons_split = NULL;
2789 #endif
2790
2791         assert(m);
2792
2793 #ifdef TARGET_ARCH
2794         if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
2795                                 "DAEMONS", &arch_daemons,
2796                                 NULL)) < 0) {
2797
2798                 if (r != -ENOENT)
2799                         log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
2800
2801         } else if (arch_daemons) {
2802                 if (!(arch_daemons_stripped = strchr(arch_daemons, '(')))
2803                         arch_daemons_stripped = arch_daemons;
2804                 else
2805                         arch_daemons_stripped++; /* strip start paren */
2806
2807                 arch_daemons_stripped[strcspn(arch_daemons_stripped, ")")] = 0; /* strip end paren */
2808
2809                 if (!(arch_daemons_split = strv_split_quoted(arch_daemons_stripped))) {
2810                         r = -ENOMEM;
2811                         goto finish;
2812                 }
2813
2814                 STRV_FOREACH(p, arch_daemons_split) {
2815
2816                         free(name);
2817                         name = NULL;
2818
2819                         if (**p == '!') /* daemons prefixed with ! are disabled, so ignore them */
2820                                 continue;
2821
2822                         if (!(name = sysv_translate_name(*p))) {
2823                                 r = -ENOMEM;
2824                                 goto finish;
2825                         }
2826
2827                         if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2828                                 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2829                                 continue;
2830                         }
2831
2832                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, "multi-user.target", NULL, true)) < 0)
2833                                 goto finish;
2834
2835                         if (previous)
2836                                 if ((r = unit_add_dependency(service, UNIT_AFTER, previous, true)) < 0)
2837                                         goto finish;
2838
2839                         if (**p != '@') /* daemons prefixed with @ can be started in the background */
2840                                 previous = service;
2841                 }
2842         }
2843 #endif
2844
2845         zero(runlevel_services);
2846
2847         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2848                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2849                         struct dirent *de;
2850
2851                         free(path);
2852                         path = NULL;
2853                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2854                                 r = -ENOMEM;
2855                                 goto finish;
2856                         }
2857
2858                         if (d)
2859                                 closedir(d);
2860
2861                         if (!(d = opendir(path))) {
2862                                 if (errno != ENOENT)
2863                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2864
2865                                 continue;
2866                         }
2867
2868                         while ((de = readdir(d))) {
2869                                 int a, b;
2870
2871                                 if (ignore_file(de->d_name))
2872                                         continue;
2873
2874                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2875                                         continue;
2876
2877                                 if (strlen(de->d_name) < 4)
2878                                         continue;
2879
2880                                 a = undecchar(de->d_name[1]);
2881                                 b = undecchar(de->d_name[2]);
2882
2883                                 if (a < 0 || b < 0)
2884                                         continue;
2885
2886                                 free(fpath);
2887                                 fpath = NULL;
2888                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2889                                         r = -ENOMEM;
2890                                         goto finish;
2891                                 }
2892
2893                                 if (access(fpath, X_OK) < 0) {
2894
2895                                         if (errno != ENOENT)
2896                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2897
2898                                         continue;
2899                                 }
2900
2901                                 free(name);
2902                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2903                                         r = -ENOMEM;
2904                                         goto finish;
2905                                 }
2906
2907                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2908                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2909                                         continue;
2910                                 }
2911
2912                                 if (de->d_name[0] == 'S')  {
2913
2914                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
2915                                                 SERVICE(service)->sysv_start_priority =
2916                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2917
2918                                                 SERVICE(service)->sysv_enabled = true;
2919                                         }
2920
2921                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
2922                                                 goto finish;
2923
2924                                         if ((r = set_put(runlevel_services[i], service)) < 0)
2925                                                 goto finish;
2926
2927                                 } else if (de->d_name[0] == 'K' &&
2928                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2929                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2930
2931                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
2932                                                 goto finish;
2933
2934                                         if ((r = set_put(shutdown_services, service)) < 0)
2935                                                 goto finish;
2936                                 }
2937                         }
2938                 }
2939
2940         /* Now we loaded all stubs and are aware of the lowest
2941         start-up priority for all services, not let's actually load
2942         the services, this will also tell us which services are
2943         actually native now */
2944         manager_dispatch_load_queue(m);
2945
2946         /* If this is a native service, rely on native ways to pull in
2947          * a service, don't pull it in via sysv rcN.d links. */
2948         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
2949                 SET_FOREACH(service, runlevel_services[i], j) {
2950                         service = unit_follow_merge(service);
2951
2952                         if (service->meta.fragment_path)
2953                                 continue;
2954
2955                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
2956                                 goto finish;
2957                 }
2958
2959         /* We honour K links only for halt/reboot. For the normal
2960          * runlevels we assume the stop jobs will be implicitly added
2961          * by the core logic. Also, we don't really distuingish here
2962          * between the runlevels 0 and 6 and just add them to the
2963          * special shutdown target. On SUSE the boot.d/ runlevel is
2964          * also used for shutdown, so we add links for that too to the
2965          * shutdown target.*/
2966         SET_FOREACH(service, shutdown_services, j) {
2967                 service = unit_follow_merge(service);
2968
2969                 if (service->meta.fragment_path)
2970                         continue;
2971
2972                 if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
2973                         goto finish;
2974         }
2975
2976         r = 0;
2977
2978 finish:
2979         free(path);
2980         free(fpath);
2981         free(name);
2982 #ifdef TARGET_ARCH
2983         free(arch_daemons);
2984         free(arch_daemons_split);
2985 #endif
2986
2987         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
2988                 set_free(runlevel_services[i]);
2989         set_free(shutdown_services);
2990
2991         if (d)
2992                 closedir(d);
2993
2994         return r;
2995 }
2996 #endif
2997
2998 static void service_bus_name_owner_change(
2999                 Unit *u,
3000                 const char *name,
3001                 const char *old_owner,
3002                 const char *new_owner) {
3003
3004         Service *s = SERVICE(u);
3005
3006         assert(s);
3007         assert(name);
3008
3009         assert(streq(s->bus_name, name));
3010         assert(old_owner || new_owner);
3011
3012         if (old_owner && new_owner)
3013                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3014         else if (old_owner)
3015                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3016         else
3017                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3018
3019         s->bus_name_good = !!new_owner;
3020
3021         if (s->type == SERVICE_DBUS) {
3022
3023                 /* service_enter_running() will figure out what to
3024                  * do */
3025                 if (s->state == SERVICE_RUNNING)
3026                         service_enter_running(s, true);
3027                 else if (s->state == SERVICE_START && new_owner)
3028                         service_enter_start_post(s);
3029
3030         } else if (new_owner &&
3031                    s->main_pid <= 0 &&
3032                    (s->state == SERVICE_START ||
3033                     s->state == SERVICE_START_POST ||
3034                     s->state == SERVICE_RUNNING ||
3035                     s->state == SERVICE_RELOAD)) {
3036
3037                 /* Try to acquire PID from bus service */
3038                 log_debug("Trying to acquire PID from D-Bus name...");
3039
3040                 bus_query_pid(u->meta.manager, name);
3041         }
3042 }
3043
3044 static void service_bus_query_pid_done(
3045                 Unit *u,
3046                 const char *name,
3047                 pid_t pid) {
3048
3049         Service *s = SERVICE(u);
3050
3051         assert(s);
3052         assert(name);
3053
3054         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3055
3056         if (s->main_pid <= 0 &&
3057             (s->state == SERVICE_START ||
3058              s->state == SERVICE_START_POST ||
3059              s->state == SERVICE_RUNNING ||
3060              s->state == SERVICE_RELOAD))
3061                 service_set_main_pid(s, pid);
3062 }
3063
3064 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3065         assert(s);
3066         assert(fd >= 0);
3067
3068         /* This is called by the socket code when instantiating a new
3069          * service for a stream socket and the socket needs to be
3070          * configured. */
3071
3072         if (s->meta.load_state != UNIT_LOADED)
3073                 return -EINVAL;
3074
3075         if (s->socket_fd >= 0)
3076                 return -EBUSY;
3077
3078         if (s->state != SERVICE_DEAD)
3079                 return -EAGAIN;
3080
3081         s->socket_fd = fd;
3082         s->got_socket_fd = true;
3083         s->accept_socket = sock;
3084
3085         return 0;
3086 }
3087
3088 static void service_reset_failed(Unit *u) {
3089         Service *s = SERVICE(u);
3090
3091         assert(s);
3092
3093         if (s->state == SERVICE_FAILED)
3094                 service_set_state(s, SERVICE_DEAD);
3095
3096         s->failure = false;
3097 }
3098
3099 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3100         [SERVICE_DEAD] = "dead",
3101         [SERVICE_START_PRE] = "start-pre",
3102         [SERVICE_START] = "start",
3103         [SERVICE_START_POST] = "start-post",
3104         [SERVICE_RUNNING] = "running",
3105         [SERVICE_EXITED] = "exited",
3106         [SERVICE_RELOAD] = "reload",
3107         [SERVICE_STOP] = "stop",
3108         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3109         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3110         [SERVICE_STOP_POST] = "stop-post",
3111         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3112         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3113         [SERVICE_FAILED] = "failed",
3114         [SERVICE_AUTO_RESTART] = "auto-restart",
3115 };
3116
3117 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3118
3119 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3120         [SERVICE_RESTART_NO] = "no",
3121         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3122         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3123         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3124         [SERVICE_RESTART_ALWAYS] = "always"
3125 };
3126
3127 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3128
3129 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3130         [SERVICE_SIMPLE] = "simple",
3131         [SERVICE_FORKING] = "forking",
3132         [SERVICE_ONESHOT] = "oneshot",
3133         [SERVICE_DBUS] = "dbus",
3134         [SERVICE_NOTIFY] = "notify"
3135 };
3136
3137 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3138
3139 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3140         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3141         [SERVICE_EXEC_START] = "ExecStart",
3142         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3143         [SERVICE_EXEC_RELOAD] = "ExecReload",
3144         [SERVICE_EXEC_STOP] = "ExecStop",
3145         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3146 };
3147
3148 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3149
3150 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3151         [NOTIFY_NONE] = "none",
3152         [NOTIFY_MAIN] = "main",
3153         [NOTIFY_ALL] = "all"
3154 };
3155
3156 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3157
3158 const UnitVTable service_vtable = {
3159         .suffix = ".service",
3160         .show_status = true,
3161
3162         .init = service_init,
3163         .done = service_done,
3164         .load = service_load,
3165
3166         .coldplug = service_coldplug,
3167
3168         .dump = service_dump,
3169
3170         .start = service_start,
3171         .stop = service_stop,
3172         .reload = service_reload,
3173
3174         .can_reload = service_can_reload,
3175
3176         .serialize = service_serialize,
3177         .deserialize_item = service_deserialize_item,
3178
3179         .active_state = service_active_state,
3180         .sub_state_to_string = service_sub_state_to_string,
3181
3182 #ifdef HAVE_SYSV_COMPAT
3183         .check_gc = service_check_gc,
3184 #endif
3185         .check_snapshot = service_check_snapshot,
3186
3187         .sigchld_event = service_sigchld_event,
3188         .timer_event = service_timer_event,
3189
3190         .reset_failed = service_reset_failed,
3191
3192         .cgroup_notify_empty = service_cgroup_notify_event,
3193         .notify_message = service_notify_message,
3194
3195         .bus_name_owner_change = service_bus_name_owner_change,
3196         .bus_query_pid_done = service_bus_query_pid_done,
3197
3198         .bus_interface = "org.freedesktop.systemd1.Service",
3199         .bus_message_handler = bus_service_message_handler,
3200         .bus_invalidating_properties =  bus_service_invalidating_properties,
3201
3202 #ifdef HAVE_SYSV_COMPAT
3203         .enumerate = service_enumerate
3204 #endif
3205 };