src/service.c

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