src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35 #include "special.h"
  36 #include "bus-errors.h"
  37
  38 #define COMMENTS "#;\n"
  39 #define NEWLINES "\n\r"
  40
  41 #ifdef HAVE_SYSV_COMPAT
  42
  43 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
  44
  45 typedef enum RunlevelType {
  46         RUNLEVEL_UP,
  47         RUNLEVEL_DOWN,
  48         RUNLEVEL_SYSINIT
  49 } RunlevelType;
  50
  51 static const struct {
  52         const char *path;
  53         const char *target;
  54         const RunlevelType type;
  55 } rcnd_table[] = {
  56         /* Standard SysV runlevels for start-up */
  57         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  58         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  59         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  60         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  61         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  62
  63 #ifdef TARGET_SUSE
  64         /* SUSE style boot.d */
  65         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  66 #endif
  67
  68 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
  69         /* Debian style rcS.d */
  70         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  71 #endif
  72
  73         /* Standard SysV runlevels for shutdown */
  74         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  75         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  76
  77         /* Note that the order here matters, as we read the
  78            directories in this order, and we want to make sure that
  79            sysv_start_priority is known when we first load the
  80            unit. And that value we only know from S links. Hence
  81            UP/SYSINIT must be read before DOWN */
  82 };
  83
  84 #define RUNLEVELS_UP "12345"
  85 /* #define RUNLEVELS_DOWN "06" */
  86 /* #define RUNLEVELS_BOOT "bBsS" */
  87 #endif
  88
  89 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  90         [SERVICE_DEAD] = UNIT_INACTIVE,
  91         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  92         [SERVICE_START] = UNIT_ACTIVATING,
  93         [SERVICE_START_POST] = UNIT_ACTIVATING,
  94         [SERVICE_RUNNING] = UNIT_ACTIVE,
  95         [SERVICE_EXITED] = UNIT_ACTIVE,
  96         [SERVICE_RELOAD] = UNIT_RELOADING,
  97         [SERVICE_STOP] = UNIT_DEACTIVATING,
  98         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 101         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 103         [SERVICE_FAILED] = UNIT_FAILED,
 104         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 105 };
 106
 107 static void service_init(Unit *u) {
 108         Service *s = SERVICE(u);
 109
 110         assert(u);
 111         assert(u->meta.load_state == UNIT_STUB);
 112
 113         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 114         s->restart_usec = DEFAULT_RESTART_USEC;
 115         s->timer_watch.type = WATCH_INVALID;
 116 #ifdef HAVE_SYSV_COMPAT
 117         s->sysv_start_priority = -1;
 118 #endif
 119         s->socket_fd = -1;
 120
 121         exec_context_init(&s->exec_context);
 122
 123         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 124
 125         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 126 }
 127
 128 static void service_unwatch_control_pid(Service *s) {
 129         assert(s);
 130
 131         if (s->control_pid <= 0)
 132                 return;
 133
 134         unit_unwatch_pid(UNIT(s), s->control_pid);
 135         s->control_pid = 0;
 136 }
 137
 138 static void service_unwatch_main_pid(Service *s) {
 139         assert(s);
 140
 141         if (s->main_pid <= 0)
 142                 return;
 143
 144         unit_unwatch_pid(UNIT(s), s->main_pid);
 145         s->main_pid = 0;
 146 }
 147
 148 static int service_set_main_pid(Service *s, pid_t pid) {
 149         pid_t ppid;
 150
 151         assert(s);
 152
 153         if (pid <= 1)
 154                 return -EINVAL;
 155
 156         if (pid == getpid())
 157                 return -EINVAL;
 158
 159         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 160                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 161                             s->meta.id, (unsigned long) pid);
 162
 163         s->main_pid = pid;
 164         s->main_pid_known = true;
 165
 166         exec_status_start(&s->main_exec_status, pid);
 167
 168         return 0;
 169 }
 170
 171 static void service_close_socket_fd(Service *s) {
 172         assert(s);
 173
 174         if (s->socket_fd < 0)
 175                 return;
 176
 177         close_nointr_nofail(s->socket_fd);
 178         s->socket_fd = -1;
 179 }
 180
 181 static void service_connection_unref(Service *s) {
 182         assert(s);
 183
 184         if (!s->accept_socket)
 185                 return;
 186
 187         socket_connection_unref(s->accept_socket);
 188         s->accept_socket = NULL;
 189 }
 190
 191 static void service_done(Unit *u) {
 192         Service *s = SERVICE(u);
 193
 194         assert(s);
 195
 196         free(s->pid_file);
 197         s->pid_file = NULL;
 198
 199 #ifdef HAVE_SYSV_COMPAT
 200         free(s->sysv_path);
 201         s->sysv_path = NULL;
 202
 203         free(s->sysv_runlevels);
 204         s->sysv_runlevels = NULL;
 205 #endif
 206
 207         free(s->status_text);
 208         s->status_text = NULL;
 209
 210         exec_context_done(&s->exec_context);
 211         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 212         s->control_command = NULL;
 213
 214         /* This will leak a process, but at least no memory or any of
 215          * our resources */
 216         service_unwatch_main_pid(s);
 217         service_unwatch_control_pid(s);
 218
 219         if (s->bus_name)  {
 220                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 221                 free(s->bus_name);
 222                 s->bus_name = NULL;
 223         }
 224
 225         service_close_socket_fd(s);
 226         service_connection_unref(s);
 227
 228         set_free(s->configured_sockets);
 229
 230         unit_unwatch_timer(u, &s->timer_watch);
 231 }
 232
 233 #ifdef HAVE_SYSV_COMPAT
 234 static char *sysv_translate_name(const char *name) {
 235         char *r;
 236
 237         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 238                 return NULL;
 239
 240         if (startswith(name, "boot."))
 241                 /* Drop SuSE-style boot. prefix */
 242                 strcpy(stpcpy(r, name + 5), ".service");
 243         else if (endswith(name, ".sh"))
 244                 /* Drop Debian-style .sh suffix */
 245                 strcpy(stpcpy(r, name) - 3, ".service");
 246 #ifdef TARGET_ARCH
 247         else if (startswith(name, "@"))
 248                 /* Drop Arch-style background prefix */
 249                 strcpy(stpcpy(r, name + 1), ".service");
 250 #endif
 251         else
 252                 /* Normal init scripts */
 253                 strcpy(stpcpy(r, name), ".service");
 254
 255         return r;
 256 }
 257
 258 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 259
 260         /* We silently ignore the $ prefix here. According to the LSB
 261          * spec it simply indicates whether something is a
 262          * standardized name or a distribution-specific one. Since we
 263          * just follow what already exists and do not introduce new
 264          * uses or names we don't care who introduced a new name. */
 265
 266         static const char * const table[] = {
 267                 /* LSB defined facilities */
 268                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 269                 "network",              SPECIAL_NETWORK_TARGET,
 270                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 271                 "portmap",              SPECIAL_RPCBIND_TARGET,
 272                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 273                 "syslog",               SPECIAL_SYSLOG_TARGET,
 274                 "time",                 SPECIAL_RTC_SET_TARGET,
 275
 276                 /* Debian extensions */
 277 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 278                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 279 #endif
 280                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 281                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 282
 283 #ifdef TARGET_FEDORA
 284                 /* Fedora extensions */
 285                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 286                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 287                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 288 #endif
 289
 290                 /* SuSE extensions */
 291                 "null",                 NULL
 292
 293         };
 294
 295         unsigned i;
 296         char *r;
 297         const char *n;
 298
 299         assert(name);
 300         assert(_r);
 301
 302         n = *name == '$' ? name + 1 : name;
 303
 304         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 305
 306                 if (!streq(table[i], n))
 307                         continue;
 308
 309                 if (!table[i+1])
 310                         return 0;
 311
 312                 if (!(r = strdup(table[i+1])))
 313                         return -ENOMEM;
 314
 315                 goto finish;
 316         }
 317
 318         /* If we don't know this name, fallback heuristics to figure
 319          * out whether something is a target or a service alias. */
 320
 321         if (*name == '$')
 322                 /* Facilities starting with $ are most likely targets */
 323                 r = unit_name_build(n, NULL, ".target");
 324         else if (filename && streq(name, filename))
 325                 /* Names equalling the file name of the services are redundant */
 326                 return 0;
 327         else
 328                 /* Everything else we assume to be normal service names */
 329                 r = sysv_translate_name(n);
 330
 331         if (!r)
 332                 return -ENOMEM;
 333
 334 finish:
 335
 336         if (_r)
 337                 *_r = r;
 338
 339         return 1;
 340 }
 341
 342 static int sysv_fix_order(Service *s) {
 343         Meta *other;
 344         int r;
 345
 346         assert(s);
 347
 348         if (s->sysv_start_priority < 0)
 349                 return 0;
 350
 351         /* For each pair of services where at least one lacks a LSB
 352          * header, we use the start priority value to order things. */
 353
 354         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 355                 Service *t;
 356                 UnitDependency d;
 357                 bool special_s, special_t;
 358
 359                 t = (Service*) other;
 360
 361                 if (s == t)
 362                         continue;
 363
 364                 if (t->meta.load_state != UNIT_LOADED)
 365                         continue;
 366
 367                 if (t->sysv_start_priority < 0)
 368                         continue;
 369
 370                 /* If both units have modern headers we don't care
 371                  * about the priorities */
 372                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 373                     (t->meta.fragment_path || t->sysv_has_lsb))
 374                         continue;
 375
 376                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 377                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 378
 379                 if (special_t && !special_s)
 380                         d = UNIT_AFTER;
 381                 else if (special_s && !special_t)
 382                         d = UNIT_BEFORE;
 383                 else if (t->sysv_start_priority < s->sysv_start_priority)
 384                         d = UNIT_AFTER;
 385                 else if (t->sysv_start_priority > s->sysv_start_priority)
 386                         d = UNIT_BEFORE;
 387                 else
 388                         continue;
 389
 390                 /* FIXME: Maybe we should compare the name here lexicographically? */
 391
 392                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 393                         return r;
 394         }
 395
 396         return 0;
 397 }
 398
 399 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 400         ExecCommand *c;
 401
 402         if (!(c = new0(ExecCommand, 1)))
 403                 return NULL;
 404
 405         if (!(c->path = strdup(path))) {
 406                 free(c);
 407                 return NULL;
 408         }
 409
 410         if (!(c->argv = strv_new(path, arg1, NULL))) {
 411                 free(c->path);
 412                 free(c);
 413                 return NULL;
 414         }
 415
 416         return c;
 417 }
 418
 419 static int sysv_exec_commands(Service *s) {
 420         ExecCommand *c;
 421
 422         assert(s);
 423         assert(s->sysv_path);
 424
 425         if (!(c = exec_command_new(s->sysv_path, "start")))
 426                 return -ENOMEM;
 427         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 428
 429         if (!(c = exec_command_new(s->sysv_path, "stop")))
 430                 return -ENOMEM;
 431         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 432
 433         if (!(c = exec_command_new(s->sysv_path, "reload")))
 434                 return -ENOMEM;
 435         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 436
 437         return 0;
 438 }
 439
 440 static int service_load_sysv_path(Service *s, const char *path) {
 441         FILE *f;
 442         Unit *u;
 443         unsigned line = 0;
 444         int r;
 445         enum {
 446                 NORMAL,
 447                 DESCRIPTION,
 448                 LSB,
 449                 LSB_DESCRIPTION
 450         } state = NORMAL;
 451         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 452
 453         assert(s);
 454         assert(path);
 455
 456         u = UNIT(s);
 457
 458         if (!(f = fopen(path, "re"))) {
 459                 r = errno == ENOENT ? 0 : -errno;
 460                 goto finish;
 461         }
 462
 463         free(s->sysv_path);
 464         if (!(s->sysv_path = strdup(path))) {
 465                 r = -ENOMEM;
 466                 goto finish;
 467         }
 468
 469         while (!feof(f)) {
 470                 char l[LINE_MAX], *t;
 471
 472                 if (!fgets(l, sizeof(l), f)) {
 473                         if (feof(f))
 474                                 break;
 475
 476                         r = -errno;
 477                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 478                         goto finish;
 479                 }
 480
 481                 line++;
 482
 483                 t = strstrip(l);
 484                 if (*t != '#')
 485                         continue;
 486
 487                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 488                         state = LSB;
 489                         s->sysv_has_lsb = true;
 490                         continue;
 491                 }
 492
 493                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 494                         state = NORMAL;
 495                         continue;
 496                 }
 497
 498                 t++;
 499                 t += strspn(t, WHITESPACE);
 500
 501                 if (state == NORMAL) {
 502
 503                         /* Try to parse Red Hat style chkconfig headers */
 504
 505                         if (startswith_no_case(t, "chkconfig:")) {
 506                                 int start_priority;
 507                                 char runlevels[16], *k;
 508
 509                                 state = NORMAL;
 510
 511                                 if (sscanf(t+10, "%15s %i %*i",
 512                                            runlevels,
 513                                            &start_priority) != 2) {
 514
 515                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 516                                         continue;
 517                                 }
 518
 519                                 /* A start priority gathered from the
 520                                  * symlink farms is preferred over the
 521                                  * data from the LSB header. */
 522                                 if (start_priority < 0 || start_priority > 99)
 523                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 524                                 else if (s->sysv_start_priority < 0)
 525                                         s->sysv_start_priority = start_priority;
 526
 527                                 char_array_0(runlevels);
 528                                 k = delete_chars(runlevels, WHITESPACE "-");
 529
 530                                 if (k[0]) {
 531                                         char *d;
 532
 533                                         if (!(d = strdup(k))) {
 534                                                 r = -ENOMEM;
 535                                                 goto finish;
 536                                         }
 537
 538                                         free(s->sysv_runlevels);
 539                                         s->sysv_runlevels = d;
 540                                 }
 541
 542                         } else if (startswith_no_case(t, "description:")) {
 543
 544                                 size_t k = strlen(t);
 545                                 char *d;
 546                                 const char *j;
 547
 548                                 if (t[k-1] == '\\') {
 549                                         state = DESCRIPTION;
 550                                         t[k-1] = 0;
 551                                 }
 552
 553                                 if ((j = strstrip(t+12)) && *j) {
 554                                         if (!(d = strdup(j))) {
 555                                                 r = -ENOMEM;
 556                                                 goto finish;
 557                                         }
 558                                 } else
 559                                         d = NULL;
 560
 561                                 free(chkconfig_description);
 562                                 chkconfig_description = d;
 563
 564                         } else if (startswith_no_case(t, "pidfile:")) {
 565
 566                                 char *fn;
 567
 568                                 state = NORMAL;
 569
 570                                 fn = strstrip(t+8);
 571                                 if (!path_is_absolute(fn)) {
 572                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 573                                         continue;
 574                                 }
 575
 576                                 if (!(fn = strdup(fn))) {
 577                                         r = -ENOMEM;
 578                                         goto finish;
 579                                 }
 580
 581                                 free(s->pid_file);
 582                                 s->pid_file = fn;
 583                         }
 584
 585                 } else if (state == DESCRIPTION) {
 586
 587                         /* Try to parse Red Hat style description
 588                          * continuation */
 589
 590                         size_t k = strlen(t);
 591                         char *j;
 592
 593                         if (t[k-1] == '\\')
 594                                 t[k-1] = 0;
 595                         else
 596                                 state = NORMAL;
 597
 598                         if ((j = strstrip(t)) && *j) {
 599                                 char *d = NULL;
 600
 601                                 if (chkconfig_description)
 602                                         asprintf(&d, "%s %s", chkconfig_description, j);
 603                                 else
 604                                         d = strdup(j);
 605
 606                                 if (!d) {
 607                                         r = -ENOMEM;
 608                                         goto finish;
 609                                 }
 610
 611                                 free(chkconfig_description);
 612                                 chkconfig_description = d;
 613                         }
 614
 615                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 616
 617                         if (startswith_no_case(t, "Provides:")) {
 618                                 char *i, *w;
 619                                 size_t z;
 620
 621                                 state = LSB;
 622
 623                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 624                                         char *n, *m;
 625
 626                                         if (!(n = strndup(w, z))) {
 627                                                 r = -ENOMEM;
 628                                                 goto finish;
 629                                         }
 630
 631                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 632                                         free(n);
 633
 634                                         if (r < 0)
 635                                                 goto finish;
 636
 637                                         if (r == 0)
 638                                                 continue;
 639
 640                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 641                                                 r = unit_add_name(u, m);
 642                                         else {
 643                                                 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 644
 645                                                 if (s->sysv_enabled) {
 646                                                         int k;
 647
 648                                                         if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
 649                                                                 r = k;
 650                                                 }
 651                                         }
 652
 653                                         if (r < 0)
 654                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 655
 656                                         free(m);
 657                                 }
 658
 659                         } else if (startswith_no_case(t, "Required-Start:") ||
 660                                    startswith_no_case(t, "Should-Start:") ||
 661                                    startswith_no_case(t, "X-Start-Before:") ||
 662                                    startswith_no_case(t, "X-Start-After:")) {
 663                                 char *i, *w;
 664                                 size_t z;
 665
 666                                 state = LSB;
 667
 668                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 669                                         char *n, *m;
 670
 671                                         if (!(n = strndup(w, z))) {
 672                                                 r = -ENOMEM;
 673                                                 goto finish;
 674                                         }
 675
 676                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 677                                         free(n);
 678
 679                                         if (r < 0)
 680                                                 goto finish;
 681
 682                                         if (r == 0)
 683                                                 continue;
 684
 685                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 686
 687                                         if (r < 0)
 688                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 689
 690                                         free(m);
 691                                 }
 692                         } else if (startswith_no_case(t, "Default-Start:")) {
 693                                 char *k, *d;
 694
 695                                 state = LSB;
 696
 697                                 k = delete_chars(t+14, WHITESPACE "-");
 698
 699                                 if (k[0] != 0) {
 700                                         if (!(d = strdup(k))) {
 701                                                 r = -ENOMEM;
 702                                                 goto finish;
 703                                         }
 704
 705                                         free(s->sysv_runlevels);
 706                                         s->sysv_runlevels = d;
 707                                 }
 708
 709                         } else if (startswith_no_case(t, "Description:")) {
 710                                 char *d, *j;
 711
 712                                 state = LSB_DESCRIPTION;
 713
 714                                 if ((j = strstrip(t+12)) && *j) {
 715                                         if (!(d = strdup(j))) {
 716                                                 r = -ENOMEM;
 717                                                 goto finish;
 718                                         }
 719                                 } else
 720                                         d = NULL;
 721
 722                                 free(long_description);
 723                                 long_description = d;
 724
 725                         } else if (startswith_no_case(t, "Short-Description:")) {
 726                                 char *d, *j;
 727
 728                                 state = LSB;
 729
 730                                 if ((j = strstrip(t+18)) && *j) {
 731                                         if (!(d = strdup(j))) {
 732                                                 r = -ENOMEM;
 733                                                 goto finish;
 734                                         }
 735                                 } else
 736                                         d = NULL;
 737
 738                                 free(short_description);
 739                                 short_description = d;
 740
 741                         } else if (startswith_no_case(t, "X-Interactive:")) {
 742                                 int b;
 743
 744                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 745                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 746                                         continue;
 747                                 }
 748
 749                                 if (b)
 750                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 751                                 else
 752                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 753
 754                         } else if (state == LSB_DESCRIPTION) {
 755
 756                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 757                                         char *j;
 758
 759                                         if ((j = strstrip(t)) && *j) {
 760                                                 char *d = NULL;
 761
 762                                                 if (long_description)
 763                                                         asprintf(&d, "%s %s", long_description, t);
 764                                                 else
 765                                                         d = strdup(j);
 766
 767                                                 if (!d) {
 768                                                         r = -ENOMEM;
 769                                                         goto finish;
 770                                                 }
 771
 772                                                 free(long_description);
 773                                                 long_description = d;
 774                                         }
 775
 776                                 } else
 777                                         state = LSB;
 778                         }
 779                 }
 780         }
 781
 782         if ((r = sysv_exec_commands(s)) < 0)
 783                 goto finish;
 784
 785         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 786                 /* If there a runlevels configured for this service
 787                  * but none of the standard ones, then we assume this
 788                  * is some special kind of service (which might be
 789                  * needed for early boot) and don't create any links
 790                  * to it. */
 791
 792                 s->meta.default_dependencies = false;
 793
 794                 /* Don't timeout special services during boot (like fsck) */
 795                 s->timeout_usec = 0;
 796         } else
 797                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 798
 799         /* Special setting for all SysV services */
 800         s->type = SERVICE_FORKING;
 801         s->remain_after_exit = true;
 802         s->restart = SERVICE_RESTART_NO;
 803         s->exec_context.std_output =
 804                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 805                 ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL;
 806         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 807
 808         /* We use the long description only if
 809          * no short description is set. */
 810
 811         if (short_description)
 812                 description = short_description;
 813         else if (chkconfig_description)
 814                 description = chkconfig_description;
 815         else if (long_description)
 816                 description = long_description;
 817         else
 818                 description = NULL;
 819
 820         if (description) {
 821                 char *d;
 822
 823                 if (!(d = strappend("LSB: ", description))) {
 824                         r = -ENOMEM;
 825                         goto finish;
 826                 }
 827
 828                 u->meta.description = d;
 829         }
 830
 831         u->meta.load_state = UNIT_LOADED;
 832         r = 0;
 833
 834 finish:
 835
 836         if (f)
 837                 fclose(f);
 838
 839         free(short_description);
 840         free(long_description);
 841         free(chkconfig_description);
 842
 843         return r;
 844 }
 845
 846 static int service_load_sysv_name(Service *s, const char *name) {
 847         char **p;
 848
 849         assert(s);
 850         assert(name);
 851
 852         /* For SysV services we strip the boot. or .sh
 853          * prefixes/suffixes. */
 854         if (startswith(name, "boot.") ||
 855             endswith(name, ".sh.service"))
 856                 return -ENOENT;
 857
 858         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 859                 char *path;
 860                 int r;
 861
 862                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 863                         return -ENOMEM;
 864
 865                 assert(endswith(path, ".service"));
 866                 path[strlen(path)-8] = 0;
 867
 868                 r = service_load_sysv_path(s, path);
 869
 870                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 871                         /* Try Debian style xxx.sh source'able init scripts */
 872                         strcat(path, ".sh");
 873                         r = service_load_sysv_path(s, path);
 874                 }
 875
 876                 free(path);
 877
 878                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 879                         /* Try SUSE style boot.xxx init scripts */
 880
 881                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 882                                 return -ENOMEM;
 883
 884                         path[strlen(path)-8] = 0;
 885                         r = service_load_sysv_path(s, path);
 886                         free(path);
 887                 }
 888
 889                 if (r < 0)
 890                         return r;
 891
 892                 if ((s->meta.load_state != UNIT_STUB))
 893                         break;
 894         }
 895
 896         return 0;
 897 }
 898
 899 static int service_load_sysv(Service *s) {
 900         const char *t;
 901         Iterator i;
 902         int r;
 903
 904         assert(s);
 905
 906         /* Load service data from SysV init scripts, preferably with
 907          * LSB headers ... */
 908
 909         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 910                 return 0;
 911
 912         if ((t = s->meta.id))
 913                 if ((r = service_load_sysv_name(s, t)) < 0)
 914                         return r;
 915
 916         if (s->meta.load_state == UNIT_STUB)
 917                 SET_FOREACH(t, s->meta.names, i) {
 918                         if (t == s->meta.id)
 919                                 continue;
 920
 921                         if ((r = service_load_sysv_name(s, t)) < 0)
 922                                 return r;
 923
 924                         if (s->meta.load_state != UNIT_STUB)
 925                                 break;
 926                 }
 927
 928         return 0;
 929 }
 930 #endif
 931
 932 static int fsck_fix_order(Service *s) {
 933         Meta *other;
 934         int r;
 935
 936         assert(s);
 937
 938         if (s->fsck_passno <= 0)
 939                 return 0;
 940
 941         /* For each pair of services where both have an fsck priority
 942          * we order things based on it. */
 943
 944         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 945                 Service *t;
 946                 UnitDependency d;
 947
 948                 t = (Service*) other;
 949
 950                 if (s == t)
 951                         continue;
 952
 953                 if (t->meta.load_state != UNIT_LOADED)
 954                         continue;
 955
 956                 if (t->fsck_passno <= 0)
 957                         continue;
 958
 959                 if (t->fsck_passno < s->fsck_passno)
 960                         d = UNIT_AFTER;
 961                 else if (t->fsck_passno > s->fsck_passno)
 962                         d = UNIT_BEFORE;
 963                 else
 964                         continue;
 965
 966                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 967                         return r;
 968         }
 969
 970         return 0;
 971 }
 972
 973 static int service_verify(Service *s) {
 974         assert(s);
 975
 976         if (s->meta.load_state != UNIT_LOADED)
 977                 return 0;
 978
 979         if (!s->exec_command[SERVICE_EXEC_START]) {
 980                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
 981                 return -EINVAL;
 982         }
 983
 984         if (s->type != SERVICE_ONESHOT &&
 985             s->exec_command[SERVICE_EXEC_START]->command_next) {
 986                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
 987                 return -EINVAL;
 988         }
 989
 990         if (s->type == SERVICE_DBUS && !s->bus_name) {
 991                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
 992                 return -EINVAL;
 993         }
 994
 995         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 996                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 997                 return -EINVAL;
 998         }
 999
1000         return 0;
1001 }
1002
1003 static int service_add_default_dependencies(Service *s) {
1004         int r;
1005
1006         assert(s);
1007
1008         /* Add a number of automatic dependencies useful for the
1009          * majority of services. */
1010
1011         /* First, pull in base system */
1012         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1013
1014                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1015                         return r;
1016
1017         } else if (s->meta.manager->running_as == MANAGER_SESSION) {
1018
1019                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1020                         return r;
1021         }
1022
1023         /* Second, activate normal shutdown */
1024         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1025 }
1026
1027 static int service_load(Unit *u) {
1028         int r;
1029         Service *s = SERVICE(u);
1030
1031         assert(s);
1032
1033         /* Load a .service file */
1034         if ((r = unit_load_fragment(u)) < 0)
1035                 return r;
1036
1037 #ifdef HAVE_SYSV_COMPAT
1038         /* Load a classic init script as a fallback, if we couldn't find anything */
1039         if (u->meta.load_state == UNIT_STUB)
1040                 if ((r = service_load_sysv(s)) < 0)
1041                         return r;
1042 #endif
1043
1044         /* Still nothing found? Then let's give up */
1045         if (u->meta.load_state == UNIT_STUB)
1046                 return -ENOENT;
1047
1048         /* We were able to load something, then let's add in the
1049          * dropin directories. */
1050         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1051                 return r;
1052
1053         /* This is a new unit? Then let's add in some extras */
1054         if (u->meta.load_state == UNIT_LOADED) {
1055                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1056                         return r;
1057
1058                 if ((r = unit_add_default_cgroup(u)) < 0)
1059                         return r;
1060
1061 #ifdef HAVE_SYSV_COMPAT
1062                 if ((r = sysv_fix_order(s)) < 0)
1063                         return r;
1064 #endif
1065
1066                 if ((r = fsck_fix_order(s)) < 0)
1067                         return r;
1068
1069                 if (s->bus_name)
1070                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1071                                 return r;
1072
1073                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1074                         s->notify_access = NOTIFY_MAIN;
1075
1076                 if (s->type == SERVICE_DBUS || s->bus_name)
1077                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1078                                 return r;
1079
1080                 if (s->meta.default_dependencies)
1081                         if ((r = service_add_default_dependencies(s)) < 0)
1082                                 return r;
1083         }
1084
1085         return service_verify(s);
1086 }
1087
1088 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1089
1090         ServiceExecCommand c;
1091         Service *s = SERVICE(u);
1092         const char *prefix2;
1093         char *p2;
1094
1095         assert(s);
1096
1097         p2 = strappend(prefix, "\t");
1098         prefix2 = p2 ? p2 : prefix;
1099
1100         fprintf(f,
1101                 "%sService State: %s\n"
1102                 "%sPermissionsStartOnly: %s\n"
1103                 "%sRootDirectoryStartOnly: %s\n"
1104                 "%sRemainAfterExit: %s\n"
1105                 "%sType: %s\n"
1106                 "%sRestart: %s\n"
1107                 "%sNotifyAccess: %s\n",
1108                 prefix, service_state_to_string(s->state),
1109                 prefix, yes_no(s->permissions_start_only),
1110                 prefix, yes_no(s->root_directory_start_only),
1111                 prefix, yes_no(s->remain_after_exit),
1112                 prefix, service_type_to_string(s->type),
1113                 prefix, service_restart_to_string(s->restart),
1114                 prefix, notify_access_to_string(s->notify_access));
1115
1116         if (s->control_pid > 0)
1117                 fprintf(f,
1118                         "%sControl PID: %lu\n",
1119                         prefix, (unsigned long) s->control_pid);
1120
1121         if (s->main_pid > 0)
1122                 fprintf(f,
1123                         "%sMain PID: %lu\n",
1124                         prefix, (unsigned long) s->main_pid);
1125
1126         if (s->pid_file)
1127                 fprintf(f,
1128                         "%sPIDFile: %s\n",
1129                         prefix, s->pid_file);
1130
1131         if (s->bus_name)
1132                 fprintf(f,
1133                         "%sBusName: %s\n"
1134                         "%sBus Name Good: %s\n",
1135                         prefix, s->bus_name,
1136                         prefix, yes_no(s->bus_name_good));
1137
1138         exec_context_dump(&s->exec_context, f, prefix);
1139
1140         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1141
1142                 if (!s->exec_command[c])
1143                         continue;
1144
1145                 fprintf(f, "%s-> %s:\n",
1146                         prefix, service_exec_command_to_string(c));
1147
1148                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1149         }
1150
1151 #ifdef HAVE_SYSV_COMPAT
1152         if (s->sysv_path)
1153                 fprintf(f,
1154                         "%sSysV Init Script Path: %s\n"
1155                         "%sSysV Init Script has LSB Header: %s\n"
1156                         "%sSysVEnabled: %s\n",
1157                         prefix, s->sysv_path,
1158                         prefix, yes_no(s->sysv_has_lsb),
1159                         prefix, yes_no(s->sysv_enabled));
1160
1161         if (s->sysv_start_priority >= 0)
1162                 fprintf(f,
1163                         "%sSysVStartPriority: %i\n",
1164                         prefix, s->sysv_start_priority);
1165
1166         if (s->sysv_runlevels)
1167                 fprintf(f, "%sSysVRunLevels: %s\n",
1168                         prefix, s->sysv_runlevels);
1169 #endif
1170
1171         if (s->fsck_passno > 0)
1172                 fprintf(f,
1173                         "%sFsckPassNo: %i\n",
1174                         prefix, s->fsck_passno);
1175
1176         if (s->status_text)
1177                 fprintf(f, "%sStatus Text: %s\n",
1178                         prefix, s->status_text);
1179
1180         free(p2);
1181 }
1182
1183 static int service_load_pid_file(Service *s) {
1184         char *k;
1185         int r;
1186         pid_t pid;
1187
1188         assert(s);
1189
1190         if (s->main_pid_known)
1191                 return 0;
1192
1193         assert(s->main_pid <= 0);
1194
1195         if (!s->pid_file)
1196                 return -ENOENT;
1197
1198         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1199                 return r;
1200
1201         r = parse_pid(k, &pid);
1202         free(k);
1203
1204         if (r < 0)
1205                 return r;
1206
1207         if (kill(pid, 0) < 0 && errno != EPERM) {
1208                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1209                             (unsigned long) pid, s->pid_file);
1210                 return -ESRCH;
1211         }
1212
1213         if ((r = service_set_main_pid(s, pid)) < 0)
1214                 return r;
1215
1216         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1217                 /* FIXME: we need to do something here */
1218                 return r;
1219
1220         return 0;
1221 }
1222
1223 static int service_get_sockets(Service *s, Set **_set) {
1224         Set *set;
1225         Iterator i;
1226         char *t;
1227         int r;
1228
1229         assert(s);
1230         assert(_set);
1231
1232         if (s->socket_fd >= 0)
1233                 return 0;
1234
1235         if (!set_isempty(s->configured_sockets))
1236                 return 0;
1237
1238         /* Collects all Socket objects that belong to this
1239          * service. Note that a service might have multiple sockets
1240          * via multiple names. */
1241
1242         if (!(set = set_new(NULL, NULL)))
1243                 return -ENOMEM;
1244
1245         SET_FOREACH(t, s->meta.names, i) {
1246                 char *k;
1247                 Unit *p;
1248
1249                 /* Look for all socket objects that go by any of our
1250                  * units and collect their fds */
1251
1252                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1253                         r = -ENOMEM;
1254                         goto fail;
1255                 }
1256
1257                 p = manager_get_unit(s->meta.manager, k);
1258                 free(k);
1259
1260                 if (!p)
1261                         continue;
1262
1263                 if ((r = set_put(set, p)) < 0)
1264                         goto fail;
1265         }
1266
1267         *_set = set;
1268         return 0;
1269
1270 fail:
1271         set_free(set);
1272         return r;
1273 }
1274
1275 static int service_notify_sockets_dead(Service *s) {
1276         Iterator i;
1277         Set *set, *free_set = NULL;
1278         Socket *sock;
1279         int r;
1280
1281         assert(s);
1282
1283         /* Notifies all our sockets when we die */
1284
1285         if (s->socket_fd >= 0)
1286                 return 0;
1287
1288         if (!set_isempty(s->configured_sockets))
1289                 set = s->configured_sockets;
1290         else {
1291                 if ((r = service_get_sockets(s, &free_set)) < 0)
1292                         return r;
1293
1294                 set = free_set;
1295         }
1296
1297         SET_FOREACH(sock, set, i)
1298                 socket_notify_service_dead(sock);
1299
1300         set_free(free_set);
1301
1302         return 0;
1303 }
1304
1305 static void service_set_state(Service *s, ServiceState state) {
1306         ServiceState old_state;
1307         assert(s);
1308
1309         old_state = s->state;
1310         s->state = state;
1311
1312         if (state != SERVICE_START_PRE &&
1313             state != SERVICE_START &&
1314             state != SERVICE_START_POST &&
1315             state != SERVICE_RELOAD &&
1316             state != SERVICE_STOP &&
1317             state != SERVICE_STOP_SIGTERM &&
1318             state != SERVICE_STOP_SIGKILL &&
1319             state != SERVICE_STOP_POST &&
1320             state != SERVICE_FINAL_SIGTERM &&
1321             state != SERVICE_FINAL_SIGKILL &&
1322             state != SERVICE_AUTO_RESTART)
1323                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1324
1325         if (state != SERVICE_START &&
1326             state != SERVICE_START_POST &&
1327             state != SERVICE_RUNNING &&
1328             state != SERVICE_RELOAD &&
1329             state != SERVICE_STOP &&
1330             state != SERVICE_STOP_SIGTERM &&
1331             state != SERVICE_STOP_SIGKILL)
1332                 service_unwatch_main_pid(s);
1333
1334         if (state != SERVICE_START_PRE &&
1335             state != SERVICE_START &&
1336             state != SERVICE_START_POST &&
1337             state != SERVICE_RELOAD &&
1338             state != SERVICE_STOP &&
1339             state != SERVICE_STOP_SIGTERM &&
1340             state != SERVICE_STOP_SIGKILL &&
1341             state != SERVICE_STOP_POST &&
1342             state != SERVICE_FINAL_SIGTERM &&
1343             state != SERVICE_FINAL_SIGKILL) {
1344                 service_unwatch_control_pid(s);
1345                 s->control_command = NULL;
1346                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1347         }
1348
1349         if (state == SERVICE_DEAD ||
1350             state == SERVICE_STOP ||
1351             state == SERVICE_STOP_SIGTERM ||
1352             state == SERVICE_STOP_SIGKILL ||
1353             state == SERVICE_STOP_POST ||
1354             state == SERVICE_FINAL_SIGTERM ||
1355             state == SERVICE_FINAL_SIGKILL ||
1356             state == SERVICE_FAILED ||
1357             state == SERVICE_AUTO_RESTART)
1358                 service_notify_sockets_dead(s);
1359
1360         if (state != SERVICE_START_PRE &&
1361             state != SERVICE_START &&
1362             state != SERVICE_START_POST &&
1363             state != SERVICE_RUNNING &&
1364             state != SERVICE_RELOAD &&
1365             state != SERVICE_STOP &&
1366             state != SERVICE_STOP_SIGTERM &&
1367             state != SERVICE_STOP_SIGKILL &&
1368             state != SERVICE_STOP_POST &&
1369             state != SERVICE_FINAL_SIGTERM &&
1370             state != SERVICE_FINAL_SIGKILL &&
1371             !(state == SERVICE_DEAD && s->meta.job)) {
1372                 service_close_socket_fd(s);
1373                 service_connection_unref(s);
1374         }
1375
1376         /* For the inactive states unit_notify() will trim the cgroup,
1377          * but for exit we have to do that ourselves... */
1378         if (state == SERVICE_EXITED)
1379                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1380
1381         if (old_state != state)
1382                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1383
1384         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1385 }
1386
1387 static int service_coldplug(Unit *u) {
1388         Service *s = SERVICE(u);
1389         int r;
1390
1391         assert(s);
1392         assert(s->state == SERVICE_DEAD);
1393
1394         if (s->deserialized_state != s->state) {
1395
1396                 if (s->deserialized_state == SERVICE_START_PRE ||
1397                     s->deserialized_state == SERVICE_START ||
1398                     s->deserialized_state == SERVICE_START_POST ||
1399                     s->deserialized_state == SERVICE_RELOAD ||
1400                     s->deserialized_state == SERVICE_STOP ||
1401                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1402                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1403                     s->deserialized_state == SERVICE_STOP_POST ||
1404                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1405                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1406                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1407
1408                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1409                                 usec_t k;
1410
1411                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1412
1413                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1414                                         return r;
1415                         }
1416                 }
1417
1418                 if ((s->deserialized_state == SERVICE_START &&
1419                      (s->type == SERVICE_FORKING ||
1420                       s->type == SERVICE_DBUS ||
1421                       s->type == SERVICE_ONESHOT ||
1422                       s->type == SERVICE_NOTIFY)) ||
1423                     s->deserialized_state == SERVICE_START_POST ||
1424                     s->deserialized_state == SERVICE_RUNNING ||
1425                     s->deserialized_state == SERVICE_RELOAD ||
1426                     s->deserialized_state == SERVICE_STOP ||
1427                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1428                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1429                         if (s->main_pid > 0)
1430                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1431                                         return r;
1432
1433                 if (s->deserialized_state == SERVICE_START_PRE ||
1434                     s->deserialized_state == SERVICE_START ||
1435                     s->deserialized_state == SERVICE_START_POST ||
1436                     s->deserialized_state == SERVICE_RELOAD ||
1437                     s->deserialized_state == SERVICE_STOP ||
1438                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1439                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1440                     s->deserialized_state == SERVICE_STOP_POST ||
1441                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1442                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1443                         if (s->control_pid > 0)
1444                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1445                                         return r;
1446
1447                 service_set_state(s, s->deserialized_state);
1448         }
1449
1450         return 0;
1451 }
1452
1453 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1454         Iterator i;
1455         int r;
1456         int *rfds = NULL;
1457         unsigned rn_fds = 0;
1458         Set *set, *free_set = NULL;
1459         Socket *sock;
1460
1461         assert(s);
1462         assert(fds);
1463         assert(n_fds);
1464
1465         if (s->socket_fd >= 0)
1466                 return 0;
1467
1468         if (!set_isempty(s->configured_sockets))
1469                 set = s->configured_sockets;
1470         else {
1471                 if ((r = service_get_sockets(s, &free_set)) < 0)
1472                         return r;
1473
1474                 set = free_set;
1475         }
1476
1477         SET_FOREACH(sock, set, i) {
1478                 int *cfds;
1479                 unsigned cn_fds;
1480
1481                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1482                         goto fail;
1483
1484                 if (!cfds)
1485                         continue;
1486
1487                 if (!rfds) {
1488                         rfds = cfds;
1489                         rn_fds = cn_fds;
1490                 } else {
1491                         int *t;
1492
1493                         if (!(t = new(int, rn_fds+cn_fds))) {
1494                                 free(cfds);
1495                                 r = -ENOMEM;
1496                                 goto fail;
1497                         }
1498
1499                         memcpy(t, rfds, rn_fds);
1500                         memcpy(t+rn_fds, cfds, cn_fds);
1501                         free(rfds);
1502                         free(cfds);
1503
1504                         rfds = t;
1505                         rn_fds = rn_fds+cn_fds;
1506                 }
1507         }
1508
1509         *fds = rfds;
1510         *n_fds = rn_fds;
1511
1512         set_free(free_set);
1513
1514         return 0;
1515
1516 fail:
1517         set_free(set);
1518         free(rfds);
1519
1520         return r;
1521 }
1522
1523 static int service_spawn(
1524                 Service *s,
1525                 ExecCommand *c,
1526                 bool timeout,
1527                 bool pass_fds,
1528                 bool apply_permissions,
1529                 bool apply_chroot,
1530                 bool apply_tty_stdin,
1531                 bool set_notify_socket,
1532                 pid_t *_pid) {
1533
1534         pid_t pid;
1535         int r;
1536         int *fds = NULL, *fdsbuf = NULL;
1537         unsigned n_fds = 0, n_env = 0;
1538         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1539
1540         assert(s);
1541         assert(c);
1542         assert(_pid);
1543
1544         if (pass_fds ||
1545             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1546             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1547             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1548
1549                 if (s->socket_fd >= 0) {
1550                         fds = &s->socket_fd;
1551                         n_fds = 1;
1552                 } else {
1553                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1554                                 goto fail;
1555
1556                         fds = fdsbuf;
1557                 }
1558         }
1559
1560         if (timeout && s->timeout_usec) {
1561                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1562                         goto fail;
1563         } else
1564                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1565
1566         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1567                 r = -ENOMEM;
1568                 goto fail;
1569         }
1570
1571         if (!(our_env = new0(char*, 4))) {
1572                 r = -ENOMEM;
1573                 goto fail;
1574         }
1575
1576         if (set_notify_socket)
1577                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1578                         r = -ENOMEM;
1579                         goto fail;
1580                 }
1581
1582         if (s->main_pid > 0)
1583                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1584                         r = -ENOMEM;
1585                         goto fail;
1586                 }
1587
1588 #ifdef HAVE_SYSV_COMPAT
1589         /* Make sure we set TERM=linux for SysV scripts, since some
1590          * require it to be set from the kernel */
1591         if (s->sysv_path && !strv_env_get(s->meta.manager->environment, "TERM"))
1592                 if (!(our_env[n_env++] = strdup("TERM=linux"))) {
1593                         r = -ENOMEM;
1594                         goto fail;
1595                 }
1596 #endif
1597
1598         if (!(final_env = strv_env_merge(2,
1599                                          s->meta.manager->environment,
1600                                          our_env,
1601                                          NULL))) {
1602                 r = -ENOMEM;
1603                 goto fail;
1604         }
1605
1606         r = exec_spawn(c,
1607                        argv,
1608                        &s->exec_context,
1609                        fds, n_fds,
1610                        final_env,
1611                        apply_permissions,
1612                        apply_chroot,
1613                        apply_tty_stdin,
1614                        s->meta.manager->confirm_spawn,
1615                        s->meta.cgroup_bondings,
1616                        &pid);
1617
1618         if (r < 0)
1619                 goto fail;
1620
1621
1622         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1623                 /* FIXME: we need to do something here */
1624                 goto fail;
1625
1626         free(fdsbuf);
1627         strv_free(argv);
1628         strv_free(our_env);
1629         strv_free(final_env);
1630
1631         *_pid = pid;
1632
1633         return 0;
1634
1635 fail:
1636         free(fdsbuf);
1637         strv_free(argv);
1638         strv_free(our_env);
1639         strv_free(final_env);
1640
1641         if (timeout)
1642                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1643
1644         return r;
1645 }
1646
1647 static int main_pid_good(Service *s) {
1648         assert(s);
1649
1650         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1651          * don't know */
1652
1653         /* If we know the pid file, then lets just check if it is
1654          * still valid */
1655         if (s->main_pid_known)
1656                 return s->main_pid > 0;
1657
1658         /* We don't know the pid */
1659         return -EAGAIN;
1660 }
1661
1662 static int control_pid_good(Service *s) {
1663         assert(s);
1664
1665         return s->control_pid > 0;
1666 }
1667
1668 static int cgroup_good(Service *s) {
1669         int r;
1670
1671         assert(s);
1672
1673         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1674                 return r;
1675
1676         return !r;
1677 }
1678
1679 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1680         int r;
1681         assert(s);
1682
1683         if (!success)
1684                 s->failure = true;
1685
1686         if (allow_restart &&
1687             !s->forbid_restart &&
1688             (s->restart == SERVICE_RESTART_ALWAYS ||
1689              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1690              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1691              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1692               (s->main_exec_status.code == CLD_KILLED ||
1693                s->main_exec_status.code == CLD_DUMPED)))) {
1694
1695                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1696                         goto fail;
1697
1698                 service_set_state(s, SERVICE_AUTO_RESTART);
1699         } else
1700                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1701
1702         s->forbid_restart = false;
1703
1704         return;
1705
1706 fail:
1707         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1708         service_enter_dead(s, false, false);
1709 }
1710
1711 static void service_enter_signal(Service *s, ServiceState state, bool success);
1712
1713 static void service_enter_stop_post(Service *s, bool success) {
1714         int r;
1715         assert(s);
1716
1717         if (!success)
1718                 s->failure = true;
1719
1720         service_unwatch_control_pid(s);
1721
1722         s->control_command_id = SERVICE_EXEC_STOP_POST;
1723         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1724                 if ((r = service_spawn(s,
1725                                        s->control_command,
1726                                        true,
1727                                        false,
1728                                        !s->permissions_start_only,
1729                                        !s->root_directory_start_only,
1730                                        true,
1731                                        false,
1732                                        &s->control_pid)) < 0)
1733                         goto fail;
1734
1735
1736                 service_set_state(s, SERVICE_STOP_POST);
1737         } else
1738                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1739
1740         return;
1741
1742 fail:
1743         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1744         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1745 }
1746
1747 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1748         int r;
1749         Set *pid_set = NULL;
1750         bool wait_for_exit = false;
1751
1752         assert(s);
1753
1754         if (!success)
1755                 s->failure = true;
1756
1757         if (s->exec_context.kill_mode != KILL_NONE) {
1758                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1759
1760                 if (s->main_pid > 0) {
1761                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1762                                  -s->main_pid :
1763                                  s->main_pid, sig) < 0 && errno != ESRCH)
1764
1765                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1766                         else
1767                                 wait_for_exit = true;
1768                 }
1769
1770                 if (s->control_pid > 0) {
1771                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1772                                  -s->control_pid :
1773                                  s->control_pid, sig) < 0 && errno != ESRCH)
1774
1775                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1776                         else
1777                                 wait_for_exit = true;
1778                 }
1779
1780                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1781
1782                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1783                                 r = -ENOMEM;
1784                                 goto fail;
1785                         }
1786
1787                         /* Exclude the main/control pids from being killed via the cgroup */
1788                         if (s->main_pid > 0)
1789                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1790                                         goto fail;
1791
1792                         if (s->control_pid > 0)
1793                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1794                                         goto fail;
1795
1796                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1797                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1798                                         log_warning("Failed to kill control group: %s", strerror(-r));
1799                         } else if (r > 0)
1800                                 wait_for_exit = true;
1801
1802                         set_free(pid_set);
1803                 }
1804         }
1805
1806         if (wait_for_exit) {
1807                 if (s->timeout_usec > 0)
1808                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1809                                 goto fail;
1810
1811                 service_set_state(s, state);
1812         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1813                 service_enter_stop_post(s, true);
1814         else
1815                 service_enter_dead(s, true, true);
1816
1817         return;
1818
1819 fail:
1820         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1821
1822         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1823                 service_enter_stop_post(s, false);
1824         else
1825                 service_enter_dead(s, false, true);
1826
1827         if (pid_set)
1828                 set_free(pid_set);
1829 }
1830
1831 static void service_enter_stop(Service *s, bool success) {
1832         int r;
1833
1834         assert(s);
1835
1836         if (!success)
1837                 s->failure = true;
1838
1839         service_unwatch_control_pid(s);
1840
1841         s->control_command_id = SERVICE_EXEC_STOP;
1842         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1843                 if ((r = service_spawn(s,
1844                                        s->control_command,
1845                                        true,
1846                                        false,
1847                                        !s->permissions_start_only,
1848                                        !s->root_directory_start_only,
1849                                        false,
1850                                        false,
1851                                        &s->control_pid)) < 0)
1852                         goto fail;
1853
1854                 service_set_state(s, SERVICE_STOP);
1855         } else
1856                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1857
1858         return;
1859
1860 fail:
1861         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1862         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1863 }
1864
1865 static void service_enter_running(Service *s, bool success) {
1866         int main_pid_ok, cgroup_ok;
1867         assert(s);
1868
1869         if (!success)
1870                 s->failure = true;
1871
1872         main_pid_ok = main_pid_good(s);
1873         cgroup_ok = cgroup_good(s);
1874
1875         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1876             (s->bus_name_good || s->type != SERVICE_DBUS))
1877                 service_set_state(s, SERVICE_RUNNING);
1878         else if (s->remain_after_exit)
1879                 service_set_state(s, SERVICE_EXITED);
1880         else
1881                 service_enter_stop(s, true);
1882 }
1883
1884 static void service_enter_start_post(Service *s) {
1885         int r;
1886         assert(s);
1887
1888         service_unwatch_control_pid(s);
1889
1890         s->control_command_id = SERVICE_EXEC_START_POST;
1891         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1892                 if ((r = service_spawn(s,
1893                                        s->control_command,
1894                                        true,
1895                                        false,
1896                                        !s->permissions_start_only,
1897                                        !s->root_directory_start_only,
1898                                        false,
1899                                        false,
1900                                        &s->control_pid)) < 0)
1901                         goto fail;
1902
1903                 service_set_state(s, SERVICE_START_POST);
1904         } else
1905                 service_enter_running(s, true);
1906
1907         return;
1908
1909 fail:
1910         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1911         service_enter_stop(s, false);
1912 }
1913
1914 static void service_enter_start(Service *s) {
1915         pid_t pid;
1916         int r;
1917
1918         assert(s);
1919
1920         assert(s->exec_command[SERVICE_EXEC_START]);
1921         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1922
1923         if (s->type == SERVICE_FORKING)
1924                 service_unwatch_control_pid(s);
1925         else
1926                 service_unwatch_main_pid(s);
1927
1928         s->control_command_id = SERVICE_EXEC_START;
1929         s->control_command = s->exec_command[SERVICE_EXEC_START];
1930
1931         if ((r = service_spawn(s,
1932                                s->control_command,
1933                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1934                                true,
1935                                true,
1936                                true,
1937                                true,
1938                                s->notify_access != NOTIFY_NONE,
1939                                &pid)) < 0)
1940                 goto fail;
1941
1942         if (s->type == SERVICE_SIMPLE) {
1943                 /* For simple services we immediately start
1944                  * the START_POST binaries. */
1945
1946                 service_set_main_pid(s, pid);
1947                 service_enter_start_post(s);
1948
1949         } else  if (s->type == SERVICE_FORKING) {
1950
1951                 /* For forking services we wait until the start
1952                  * process exited. */
1953
1954                 s->control_pid = pid;
1955                 service_set_state(s, SERVICE_START);
1956
1957         } else if (s->type == SERVICE_ONESHOT ||
1958                    s->type == SERVICE_DBUS ||
1959                    s->type == SERVICE_NOTIFY) {
1960
1961                 /* For oneshot services we wait until the start
1962                  * process exited, too, but it is our main process. */
1963
1964                 /* For D-Bus services we know the main pid right away,
1965                  * but wait for the bus name to appear on the
1966                  * bus. Notify services are similar. */
1967
1968                 service_set_main_pid(s, pid);
1969                 service_set_state(s, SERVICE_START);
1970         } else
1971                 assert_not_reached("Unknown service type");
1972
1973         return;
1974
1975 fail:
1976         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
1977         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1978 }
1979
1980 static void service_enter_start_pre(Service *s) {
1981         int r;
1982
1983         assert(s);
1984
1985         service_unwatch_control_pid(s);
1986
1987         s->control_command_id = SERVICE_EXEC_START_PRE;
1988         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1989                 if ((r = service_spawn(s,
1990                                        s->control_command,
1991                                        true,
1992                                        false,
1993                                        !s->permissions_start_only,
1994                                        !s->root_directory_start_only,
1995                                        true,
1996                                        false,
1997                                        &s->control_pid)) < 0)
1998                         goto fail;
1999
2000                 service_set_state(s, SERVICE_START_PRE);
2001         } else
2002                 service_enter_start(s);
2003
2004         return;
2005
2006 fail:
2007         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2008         service_enter_dead(s, false, true);
2009 }
2010
2011 static void service_enter_restart(Service *s) {
2012         int r;
2013         DBusError error;
2014
2015         assert(s);
2016         dbus_error_init(&error);
2017
2018         service_enter_dead(s, true, false);
2019
2020         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2021                 goto fail;
2022
2023         log_debug("%s scheduled restart job.", s->meta.id);
2024         return;
2025
2026 fail:
2027         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2028         service_enter_dead(s, false, false);
2029
2030         dbus_error_free(&error);
2031 }
2032
2033 static void service_enter_reload(Service *s) {
2034         int r;
2035
2036         assert(s);
2037
2038         service_unwatch_control_pid(s);
2039
2040         s->control_command_id = SERVICE_EXEC_RELOAD;
2041         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2042                 if ((r = service_spawn(s,
2043                                        s->control_command,
2044                                        true,
2045                                        false,
2046                                        !s->permissions_start_only,
2047                                        !s->root_directory_start_only,
2048                                        false,
2049                                        false,
2050                                        &s->control_pid)) < 0)
2051                         goto fail;
2052
2053                 service_set_state(s, SERVICE_RELOAD);
2054         } else
2055                 service_enter_running(s, true);
2056
2057         return;
2058
2059 fail:
2060         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2061         service_enter_stop(s, false);
2062 }
2063
2064 static void service_run_next_control(Service *s, bool success) {
2065         int r;
2066
2067         assert(s);
2068         assert(s->control_command);
2069         assert(s->control_command->command_next);
2070
2071         if (!success)
2072                 s->failure = true;
2073
2074         assert(s->control_command_id != SERVICE_EXEC_START);
2075
2076         s->control_command = s->control_command->command_next;
2077         service_unwatch_control_pid(s);
2078
2079         if ((r = service_spawn(s,
2080                                s->control_command,
2081                                true,
2082                                false,
2083                                !s->permissions_start_only,
2084                                !s->root_directory_start_only,
2085                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2086                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2087                                false,
2088                                &s->control_pid)) < 0)
2089                 goto fail;
2090
2091         return;
2092
2093 fail:
2094         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2095
2096         if (s->state == SERVICE_START_PRE)
2097                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2098         else if (s->state == SERVICE_STOP)
2099                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2100         else if (s->state == SERVICE_STOP_POST)
2101                 service_enter_dead(s, false, true);
2102         else
2103                 service_enter_stop(s, false);
2104 }
2105
2106 static void service_run_next_main(Service *s, bool success) {
2107         pid_t pid;
2108         int r;
2109
2110         assert(s);
2111         assert(s->control_command);
2112         assert(s->control_command->command_next);
2113
2114         if (!success)
2115                 s->failure = true;
2116
2117         assert(s->control_command_id == SERVICE_EXEC_START);
2118         assert(s->type == SERVICE_ONESHOT);
2119
2120         s->control_command = s->control_command->command_next;
2121         service_unwatch_main_pid(s);
2122
2123         if ((r = service_spawn(s,
2124                                s->control_command,
2125                                false,
2126                                true,
2127                                true,
2128                                true,
2129                                true,
2130                                s->notify_access != NOTIFY_NONE,
2131                                &pid)) < 0)
2132                 goto fail;
2133
2134         service_set_main_pid(s, pid);
2135
2136         return;
2137
2138 fail:
2139         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2140         service_enter_stop(s, false);
2141 }
2142
2143 static int service_start(Unit *u) {
2144         Service *s = SERVICE(u);
2145
2146         assert(s);
2147
2148         /* We cannot fulfill this request right now, try again later
2149          * please! */
2150         if (s->state == SERVICE_STOP ||
2151             s->state == SERVICE_STOP_SIGTERM ||
2152             s->state == SERVICE_STOP_SIGKILL ||
2153             s->state == SERVICE_STOP_POST ||
2154             s->state == SERVICE_FINAL_SIGTERM ||
2155             s->state == SERVICE_FINAL_SIGKILL)
2156                 return -EAGAIN;
2157
2158         /* Already on it! */
2159         if (s->state == SERVICE_START_PRE ||
2160             s->state == SERVICE_START ||
2161             s->state == SERVICE_START_POST)
2162                 return 0;
2163
2164         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2165
2166         /* Make sure we don't enter a busy loop of some kind. */
2167         if (!ratelimit_test(&s->ratelimit)) {
2168                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2169                 return -ECANCELED;
2170         }
2171
2172         s->failure = false;
2173         s->main_pid_known = false;
2174         s->forbid_restart = false;
2175
2176         service_enter_start_pre(s);
2177         return 0;
2178 }
2179
2180 static int service_stop(Unit *u) {
2181         Service *s = SERVICE(u);
2182
2183         assert(s);
2184
2185         /* This is a user request, so don't do restarts on this
2186          * shutdown. */
2187         s->forbid_restart = true;
2188
2189         /* Already on it */
2190         if (s->state == SERVICE_STOP ||
2191             s->state == SERVICE_STOP_SIGTERM ||
2192             s->state == SERVICE_STOP_SIGKILL ||
2193             s->state == SERVICE_STOP_POST ||
2194             s->state == SERVICE_FINAL_SIGTERM ||
2195             s->state == SERVICE_FINAL_SIGKILL)
2196                 return 0;
2197
2198         /* Don't allow a restart */
2199         if (s->state == SERVICE_AUTO_RESTART) {
2200                 service_set_state(s, SERVICE_DEAD);
2201                 return 0;
2202         }
2203
2204         /* If there's already something running we go directly into
2205          * kill mode. */
2206         if (s->state == SERVICE_START_PRE ||
2207             s->state == SERVICE_START ||
2208             s->state == SERVICE_START_POST ||
2209             s->state == SERVICE_RELOAD) {
2210                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2211                 return 0;
2212         }
2213
2214         assert(s->state == SERVICE_RUNNING ||
2215                s->state == SERVICE_EXITED);
2216
2217         service_enter_stop(s, true);
2218         return 0;
2219 }
2220
2221 static int service_reload(Unit *u) {
2222         Service *s = SERVICE(u);
2223
2224         assert(s);
2225
2226         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2227
2228         service_enter_reload(s);
2229         return 0;
2230 }
2231
2232 static bool service_can_reload(Unit *u) {
2233         Service *s = SERVICE(u);
2234
2235         assert(s);
2236
2237         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2238 }
2239
2240 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2241         Service *s = SERVICE(u);
2242
2243         assert(u);
2244         assert(f);
2245         assert(fds);
2246
2247         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2248         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2249
2250         if (s->control_pid > 0)
2251                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2252
2253         if (s->main_pid_known && s->main_pid > 0)
2254                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2255
2256         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2257
2258         if (s->status_text)
2259                 unit_serialize_item(u, f, "status-text", s->status_text);
2260
2261         /* There's a minor uncleanliness here: if there are multiple
2262          * commands attached here, we will start from the first one
2263          * again */
2264         if (s->control_command_id >= 0)
2265                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2266
2267         if (s->socket_fd >= 0) {
2268                 int copy;
2269
2270                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2271                         return copy;
2272
2273                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2274         }
2275
2276         if (s->main_exec_status.pid > 0) {
2277                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2278
2279                 if (s->main_exec_status.start_timestamp.realtime > 0) {
2280                         unit_serialize_item_format(u, f, "main-exec-status-start-realtime",
2281                                                    "%llu", (unsigned long long) s->main_exec_status.start_timestamp.realtime);
2282
2283                         unit_serialize_item_format(u, f, "main-exec-status-start-monotonic",
2284                                                    "%llu", (unsigned long long) s->main_exec_status.start_timestamp.monotonic);
2285                 }
2286
2287                 if (s->main_exec_status.exit_timestamp.realtime > 0) {
2288                         unit_serialize_item_format(u, f, "main-exec-status-exit-realtime",
2289                                                    "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.realtime);
2290                         unit_serialize_item_format(u, f, "main-exec-status-exit-monotonic",
2291                                                    "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.monotonic);
2292
2293                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2294                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2295                 }
2296         }
2297
2298         return 0;
2299 }
2300
2301 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2302         Service *s = SERVICE(u);
2303
2304         assert(u);
2305         assert(key);
2306         assert(value);
2307         assert(fds);
2308
2309         if (streq(key, "state")) {
2310                 ServiceState state;
2311
2312                 if ((state = service_state_from_string(value)) < 0)
2313                         log_debug("Failed to parse state value %s", value);
2314                 else
2315                         s->deserialized_state = state;
2316         } else if (streq(key, "failure")) {
2317                 int b;
2318
2319                 if ((b = parse_boolean(value)) < 0)
2320                         log_debug("Failed to parse failure value %s", value);
2321                 else
2322                         s->failure = b || s->failure;
2323         } else if (streq(key, "control-pid")) {
2324                 pid_t pid;
2325
2326                 if (parse_pid(value, &pid) < 0)
2327                         log_debug("Failed to parse control-pid value %s", value);
2328                 else
2329                         s->control_pid = pid;
2330         } else if (streq(key, "main-pid")) {
2331                 pid_t pid;
2332
2333                 if (parse_pid(value, &pid) < 0)
2334                         log_debug("Failed to parse main-pid value %s", value);
2335                 else
2336                         service_set_main_pid(s, (pid_t) pid);
2337         } else if (streq(key, "main-pid-known")) {
2338                 int b;
2339
2340                 if ((b = parse_boolean(value)) < 0)
2341                         log_debug("Failed to parse main-pid-known value %s", value);
2342                 else
2343                         s->main_pid_known = b;
2344         } else if (streq(key, "status-text")) {
2345                 char *t;
2346
2347                 if ((t = strdup(value))) {
2348                         free(s->status_text);
2349                         s->status_text = t;
2350                 }
2351
2352         } else if (streq(key, "control-command")) {
2353                 ServiceExecCommand id;
2354
2355                 if ((id = service_exec_command_from_string(value)) < 0)
2356                         log_debug("Failed to parse exec-command value %s", value);
2357                 else {
2358                         s->control_command_id = id;
2359                         s->control_command = s->exec_command[id];
2360                 }
2361         } else if (streq(key, "socket-fd")) {
2362                 int fd;
2363
2364                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2365                         log_debug("Failed to parse socket-fd value %s", value);
2366                 else {
2367
2368                         if (s->socket_fd >= 0)
2369                                 close_nointr_nofail(s->socket_fd);
2370                         s->socket_fd = fdset_remove(fds, fd);
2371                 }
2372         } else if (streq(key, "main-exec-status-pid")) {
2373                 pid_t pid;
2374
2375                 if (parse_pid(value, &pid) < 0)
2376                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2377                 else
2378                         s->main_exec_status.pid = pid;
2379         } else if (streq(key, "main-exec-status-code")) {
2380                 int i;
2381
2382                 if (safe_atoi(value, &i) < 0)
2383                         log_debug("Failed to parse main-exec-status-code value %s", value);
2384                 else
2385                         s->main_exec_status.code = i;
2386         } else if (streq(key, "main-exec-status-status")) {
2387                 int i;
2388
2389                 if (safe_atoi(value, &i) < 0)
2390                         log_debug("Failed to parse main-exec-status-status value %s", value);
2391                 else
2392                         s->main_exec_status.status = i;
2393         } else if (streq(key, "main-exec-status-start-realtime")) {
2394                 uint64_t k;
2395
2396                 if (safe_atou64(value, &k) < 0)
2397                         log_debug("Failed to parse main-exec-status-start-realtime value %s", value);
2398                 else
2399                         s->main_exec_status.start_timestamp.realtime = (usec_t) k;
2400         } else if (streq(key, "main-exec-status-start-monotonic")) {
2401                 uint64_t k;
2402
2403                 if (safe_atou64(value, &k) < 0)
2404                         log_debug("Failed to parse main-exec-status-start-monotonic value %s", value);
2405                 else
2406                         s->main_exec_status.start_timestamp.monotonic = (usec_t) k;
2407         } else if (streq(key, "main-exec-status-exit-realtime")) {
2408                 uint64_t k;
2409
2410                 if (safe_atou64(value, &k) < 0)
2411                         log_debug("Failed to parse main-exec-status-exit-realtime value %s", value);
2412                 else
2413                         s->main_exec_status.exit_timestamp.realtime = (usec_t) k;
2414         } else if (streq(key, "main-exec-status-exit-monotonic")) {
2415                 uint64_t k;
2416
2417                 if (safe_atou64(value, &k) < 0)
2418                         log_debug("Failed to parse main-exec-status-exit-monotonic value %s", value);
2419                 else
2420                         s->main_exec_status.exit_timestamp.monotonic = (usec_t) k;
2421         } else
2422                 log_debug("Unknown serialization key '%s'", key);
2423
2424         return 0;
2425 }
2426
2427 static UnitActiveState service_active_state(Unit *u) {
2428         assert(u);
2429
2430         return state_translation_table[SERVICE(u)->state];
2431 }
2432
2433 static const char *service_sub_state_to_string(Unit *u) {
2434         assert(u);
2435
2436         return service_state_to_string(SERVICE(u)->state);
2437 }
2438
2439 #ifdef HAVE_SYSV_COMPAT
2440 static bool service_check_gc(Unit *u) {
2441         Service *s = SERVICE(u);
2442
2443         assert(s);
2444
2445         return !!s->sysv_path;
2446 }
2447 #endif
2448
2449 static bool service_check_snapshot(Unit *u) {
2450         Service *s = SERVICE(u);
2451
2452         assert(s);
2453
2454         return !s->got_socket_fd;
2455 }
2456
2457 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2458         Service *s = SERVICE(u);
2459         bool success;
2460
2461         assert(s);
2462         assert(pid >= 0);
2463
2464         if (!s->meta.fragment_path)
2465                 success = is_clean_exit_lsb(code, status);
2466         else
2467                 success = is_clean_exit(code, status);
2468
2469         if (s->main_pid == pid) {
2470
2471                 s->main_pid = 0;
2472                 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2473
2474                 if (s->type != SERVICE_FORKING && s->control_command) {
2475                         s->control_command->exec_status = s->main_exec_status;
2476
2477                         if (s->control_command->ignore)
2478                                 success = true;
2479                 }
2480
2481                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2482                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2483                 s->failure = s->failure || !success;
2484
2485                 if (s->control_command &&
2486                     s->control_command->command_next &&
2487                     success) {
2488
2489                         /* There is another command to *
2490                          * execute, so let's do that. */
2491
2492                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2493                         service_run_next_main(s, success);
2494
2495                 } else {
2496
2497                         /* The service exited, so the service is officially
2498                          * gone. */
2499
2500                         s->control_command = NULL;
2501                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2502
2503                         switch (s->state) {
2504
2505                         case SERVICE_START_POST:
2506                         case SERVICE_RELOAD:
2507                         case SERVICE_STOP:
2508                                 /* Need to wait until the operation is
2509                                  * done */
2510                                 break;
2511
2512                         case SERVICE_START:
2513                                 if (s->type == SERVICE_ONESHOT) {
2514                                         /* This was our main goal, so let's go on */
2515                                         if (success)
2516                                                 service_enter_start_post(s);
2517                                         else
2518                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2519                                         break;
2520                                 } else {
2521                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2522
2523                                         /* Fall through */
2524                                 }
2525
2526                         case SERVICE_RUNNING:
2527                                 service_enter_running(s, success);
2528                                 break;
2529
2530                         case SERVICE_STOP_SIGTERM:
2531                         case SERVICE_STOP_SIGKILL:
2532
2533                                 if (!control_pid_good(s))
2534                                         service_enter_stop_post(s, success);
2535
2536                                 /* If there is still a control process, wait for that first */
2537                                 break;
2538
2539                         default:
2540                                 assert_not_reached("Uh, main process died at wrong time.");
2541                         }
2542                 }
2543
2544         } else if (s->control_pid == pid) {
2545
2546                 s->control_pid = 0;
2547
2548                 if (s->control_command) {
2549                         exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2550
2551                         if (s->control_command->ignore)
2552                                 success = true;
2553                 }
2554
2555                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2556                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2557                 s->failure = s->failure || !success;
2558
2559                 if (s->control_command &&
2560                     s->control_command->command_next &&
2561                     success) {
2562
2563                         /* There is another command to *
2564                          * execute, so let's do that. */
2565
2566                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2567                         service_run_next_control(s, success);
2568
2569                 } else {
2570                         /* No further commands for this step, so let's
2571                          * figure out what to do next */
2572
2573                         s->control_command = NULL;
2574                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2575
2576                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2577
2578                         switch (s->state) {
2579
2580                         case SERVICE_START_PRE:
2581                                 if (success)
2582                                         service_enter_start(s);
2583                                 else
2584                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2585                                 break;
2586
2587                         case SERVICE_START:
2588                                 assert(s->type == SERVICE_FORKING);
2589
2590                                 /* Let's try to load the pid
2591                                  * file here if we can. We
2592                                  * ignore the return value,
2593                                  * since the PID file might
2594                                  * actually be created by a
2595                                  * START_POST script */
2596
2597                                 if (success) {
2598                                         if (s->pid_file)
2599                                                 service_load_pid_file(s);
2600
2601                                         service_enter_start_post(s);
2602                                 } else
2603                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2604
2605                                 break;
2606
2607                         case SERVICE_START_POST:
2608                                 if (success && s->pid_file && !s->main_pid_known) {
2609                                         int r;
2610
2611                                         /* Hmm, let's see if we can
2612                                          * load the pid now after the
2613                                          * start-post scripts got
2614                                          * executed. */
2615
2616                                         if ((r = service_load_pid_file(s)) < 0)
2617                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2618                                 }
2619
2620                                 /* Fall through */
2621
2622                         case SERVICE_RELOAD:
2623                                 if (success)
2624                                         service_enter_running(s, true);
2625                                 else
2626                                         service_enter_stop(s, false);
2627
2628                                 break;
2629
2630                         case SERVICE_STOP:
2631                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2632                                 break;
2633
2634                         case SERVICE_STOP_SIGTERM:
2635                         case SERVICE_STOP_SIGKILL:
2636                                 if (main_pid_good(s) <= 0)
2637                                         service_enter_stop_post(s, success);
2638
2639                                 /* If there is still a service
2640                                  * process around, wait until
2641                                  * that one quit, too */
2642                                 break;
2643
2644                         case SERVICE_STOP_POST:
2645                         case SERVICE_FINAL_SIGTERM:
2646                         case SERVICE_FINAL_SIGKILL:
2647                                 service_enter_dead(s, success, true);
2648                                 break;
2649
2650                         default:
2651                                 assert_not_reached("Uh, control process died at wrong time.");
2652                         }
2653                 }
2654         }
2655
2656         /* Notify clients about changed exit status */
2657         unit_add_to_dbus_queue(u);
2658 }
2659
2660 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2661         Service *s = SERVICE(u);
2662
2663         assert(s);
2664         assert(elapsed == 1);
2665
2666         assert(w == &s->timer_watch);
2667
2668         switch (s->state) {
2669
2670         case SERVICE_START_PRE:
2671         case SERVICE_START:
2672                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2673                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2674                 break;
2675
2676         case SERVICE_START_POST:
2677         case SERVICE_RELOAD:
2678                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2679                 service_enter_stop(s, false);
2680                 break;
2681
2682         case SERVICE_STOP:
2683                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2684                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2685                 break;
2686
2687         case SERVICE_STOP_SIGTERM:
2688                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2689                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2690                 break;
2691
2692         case SERVICE_STOP_SIGKILL:
2693                 /* Uh, wie sent a SIGKILL and it is still not gone?
2694                  * Must be something we cannot kill, so let's just be
2695                  * weirded out and continue */
2696
2697                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2698                 service_enter_stop_post(s, false);
2699                 break;
2700
2701         case SERVICE_STOP_POST:
2702                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2703                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2704                 break;
2705
2706         case SERVICE_FINAL_SIGTERM:
2707                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2708                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2709                 break;
2710
2711         case SERVICE_FINAL_SIGKILL:
2712                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2713                 service_enter_dead(s, false, true);
2714                 break;
2715
2716         case SERVICE_AUTO_RESTART:
2717                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2718                 service_enter_restart(s);
2719                 break;
2720
2721         default:
2722                 assert_not_reached("Timeout at wrong time.");
2723         }
2724 }
2725
2726 static void service_cgroup_notify_event(Unit *u) {
2727         Service *s = SERVICE(u);
2728
2729         assert(u);
2730
2731         log_debug("%s: cgroup is empty", u->meta.id);
2732
2733         switch (s->state) {
2734
2735                 /* Waiting for SIGCHLD is usually more interesting,
2736                  * because it includes return codes/signals. Which is
2737                  * why we ignore the cgroup events for most cases,
2738                  * except when we don't know pid which to expect the
2739                  * SIGCHLD for. */
2740
2741         case SERVICE_RUNNING:
2742                 service_enter_running(s, true);
2743                 break;
2744
2745         case SERVICE_STOP_SIGTERM:
2746         case SERVICE_STOP_SIGKILL:
2747                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2748                         service_enter_stop_post(s, true);
2749
2750                 break;
2751
2752         case SERVICE_FINAL_SIGTERM:
2753         case SERVICE_FINAL_SIGKILL:
2754                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2755                         service_enter_dead(s, true, true);
2756
2757                 break;
2758
2759         default:
2760                 ;
2761         }
2762 }
2763
2764 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2765         Service *s = SERVICE(u);
2766         const char *e;
2767
2768         assert(u);
2769
2770         if (s->notify_access == NOTIFY_NONE) {
2771                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2772                             u->meta.id, (unsigned long) pid);
2773                 return;
2774         }
2775
2776         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2777                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2778                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2779                 return;
2780         }
2781
2782         log_debug("%s: Got message", u->meta.id);
2783
2784         /* Interpret MAINPID= */
2785         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2786             (s->state == SERVICE_START ||
2787              s->state == SERVICE_START_POST ||
2788              s->state == SERVICE_RUNNING ||
2789              s->state == SERVICE_RELOAD)) {
2790
2791                 if (parse_pid(e + 8, &pid) < 0)
2792                         log_warning("Failed to parse notification message %s", e);
2793                 else {
2794                         log_debug("%s: got %s", u->meta.id, e);
2795                         service_set_main_pid(s, pid);
2796                 }
2797         }
2798
2799         /* Interpret READY= */
2800         if (s->type == SERVICE_NOTIFY &&
2801             s->state == SERVICE_START &&
2802             strv_find(tags, "READY=1")) {
2803                 log_debug("%s: got READY=1", u->meta.id);
2804
2805                 service_enter_start_post(s);
2806         }
2807
2808         /* Interpret STATUS= */
2809         if ((e = strv_find_prefix(tags, "STATUS="))) {
2810                 char *t;
2811
2812                 if (e[7]) {
2813                         if (!(t = strdup(e+7))) {
2814                                 log_error("Failed to allocate string.");
2815                                 return;
2816                         }
2817
2818                         log_debug("%s: got %s", u->meta.id, e);
2819
2820                         free(s->status_text);
2821                         s->status_text = t;
2822                 } else {
2823                         free(s->status_text);
2824                         s->status_text = NULL;
2825                 }
2826
2827         }
2828
2829         /* Notify clients about changed status or main pid */
2830         unit_add_to_dbus_queue(u);
2831 }
2832
2833 #ifdef HAVE_SYSV_COMPAT
2834 static int service_enumerate(Manager *m) {
2835         char **p;
2836         unsigned i;
2837         DIR *d = NULL;
2838         char *path = NULL, *fpath = NULL, *name = NULL;
2839         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2840         Unit *service;
2841         Iterator j;
2842         int r;
2843 #ifdef TARGET_ARCH
2844         Unit *previous = NULL;
2845         char *arch_daemons = NULL;
2846         char *arch_daemons_stripped = NULL;
2847         char **arch_daemons_split = NULL;
2848 #endif
2849
2850         assert(m);
2851
2852 #ifdef TARGET_ARCH
2853         if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
2854                                 "DAEMONS", &arch_daemons,
2855                                 NULL)) < 0) {
2856
2857                 if (r != -ENOENT)
2858                         log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
2859
2860         } else if (arch_daemons) {
2861                 if (!(arch_daemons_stripped = strchr(arch_daemons, '(')))
2862                         arch_daemons_stripped = arch_daemons;
2863                 else
2864                         arch_daemons_stripped++; /* strip start paren */
2865
2866                 arch_daemons_stripped[strcspn(arch_daemons_stripped, ")")] = 0; /* strip end paren */
2867
2868                 if (!(arch_daemons_split = strv_split_quoted(arch_daemons_stripped))) {
2869                         r = -ENOMEM;
2870                         goto finish;
2871                 }
2872
2873                 STRV_FOREACH(p, arch_daemons_split) {
2874
2875                         free(name);
2876                         name = NULL;
2877
2878                         if (**p == '!') /* daemons prefixed with ! are disabled, so ignore them */
2879                                 continue;
2880
2881                         if (!(name = sysv_translate_name(*p))) {
2882                                 r = -ENOMEM;
2883                                 goto finish;
2884                         }
2885
2886                         if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2887                                 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2888                                 continue;
2889                         }
2890
2891                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, "multi-user.target", NULL, true)) < 0)
2892                                 goto finish;
2893
2894                         if (previous)
2895                                 if ((r = unit_add_dependency(service, UNIT_AFTER, previous, true)) < 0)
2896                                         goto finish;
2897
2898                         if (**p != '@') /* daemons prefixed with @ can be started in the background */
2899                                 previous = service;
2900                 }
2901         }
2902 #endif
2903
2904         zero(runlevel_services);
2905
2906         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2907                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2908                         struct dirent *de;
2909
2910                         free(path);
2911                         path = NULL;
2912                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2913                                 r = -ENOMEM;
2914                                 goto finish;
2915                         }
2916
2917                         if (d)
2918                                 closedir(d);
2919
2920                         if (!(d = opendir(path))) {
2921                                 if (errno != ENOENT)
2922                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2923
2924                                 continue;
2925                         }
2926
2927                         while ((de = readdir(d))) {
2928                                 int a, b;
2929
2930                                 if (ignore_file(de->d_name))
2931                                         continue;
2932
2933                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2934                                         continue;
2935
2936                                 if (strlen(de->d_name) < 4)
2937                                         continue;
2938
2939                                 a = undecchar(de->d_name[1]);
2940                                 b = undecchar(de->d_name[2]);
2941
2942                                 if (a < 0 || b < 0)
2943                                         continue;
2944
2945                                 free(fpath);
2946                                 fpath = NULL;
2947                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2948                                         r = -ENOMEM;
2949                                         goto finish;
2950                                 }
2951
2952                                 if (access(fpath, X_OK) < 0) {
2953
2954                                         if (errno != ENOENT)
2955                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2956
2957                                         continue;
2958                                 }
2959
2960                                 free(name);
2961                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2962                                         r = -ENOMEM;
2963                                         goto finish;
2964                                 }
2965
2966                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2967                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2968                                         continue;
2969                                 }
2970
2971                                 if (de->d_name[0] == 'S')  {
2972
2973                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
2974                                                 SERVICE(service)->sysv_start_priority =
2975                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2976
2977                                                 SERVICE(service)->sysv_enabled = true;
2978                                         }
2979
2980                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
2981                                                 goto finish;
2982
2983                                         if ((r = set_put(runlevel_services[i], service)) < 0)
2984                                                 goto finish;
2985
2986                                 } else if (de->d_name[0] == 'K' &&
2987                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2988                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2989
2990                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
2991                                                 goto finish;
2992
2993                                         if ((r = set_put(shutdown_services, service)) < 0)
2994                                                 goto finish;
2995                                 }
2996                         }
2997                 }
2998
2999         /* Now we loaded all stubs and are aware of the lowest
3000         start-up priority for all services, not let's actually load
3001         the services, this will also tell us which services are
3002         actually native now */
3003         manager_dispatch_load_queue(m);
3004
3005         /* If this is a native service, rely on native ways to pull in
3006          * a service, don't pull it in via sysv rcN.d links. */
3007         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3008                 SET_FOREACH(service, runlevel_services[i], j) {
3009                         service = unit_follow_merge(service);
3010
3011                         if (service->meta.fragment_path)
3012                                 continue;
3013
3014                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3015                                 goto finish;
3016                 }
3017
3018         /* We honour K links only for halt/reboot. For the normal
3019          * runlevels we assume the stop jobs will be implicitly added
3020          * by the core logic. Also, we don't really distuingish here
3021          * between the runlevels 0 and 6 and just add them to the
3022          * special shutdown target. On SUSE the boot.d/ runlevel is
3023          * also used for shutdown, so we add links for that too to the
3024          * shutdown target.*/
3025         SET_FOREACH(service, shutdown_services, j) {
3026                 service = unit_follow_merge(service);
3027
3028                 if (service->meta.fragment_path)
3029                         continue;
3030
3031                 if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3032                         goto finish;
3033         }
3034
3035         r = 0;
3036
3037 finish:
3038         free(path);
3039         free(fpath);
3040         free(name);
3041 #ifdef TARGET_ARCH
3042         free(arch_daemons);
3043         free(arch_daemons_split);
3044 #endif
3045
3046         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3047                 set_free(runlevel_services[i]);
3048         set_free(shutdown_services);
3049
3050         if (d)
3051                 closedir(d);
3052
3053         return r;
3054 }
3055 #endif
3056
3057 static void service_bus_name_owner_change(
3058                 Unit *u,
3059                 const char *name,
3060                 const char *old_owner,
3061                 const char *new_owner) {
3062
3063         Service *s = SERVICE(u);
3064
3065         assert(s);
3066         assert(name);
3067
3068         assert(streq(s->bus_name, name));
3069         assert(old_owner || new_owner);
3070
3071         if (old_owner && new_owner)
3072                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3073         else if (old_owner)
3074                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3075         else
3076                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3077
3078         s->bus_name_good = !!new_owner;
3079
3080         if (s->type == SERVICE_DBUS) {
3081
3082                 /* service_enter_running() will figure out what to
3083                  * do */
3084                 if (s->state == SERVICE_RUNNING)
3085                         service_enter_running(s, true);
3086                 else if (s->state == SERVICE_START && new_owner)
3087                         service_enter_start_post(s);
3088
3089         } else if (new_owner &&
3090                    s->main_pid <= 0 &&
3091                    (s->state == SERVICE_START ||
3092                     s->state == SERVICE_START_POST ||
3093                     s->state == SERVICE_RUNNING ||
3094                     s->state == SERVICE_RELOAD)) {
3095
3096                 /* Try to acquire PID from bus service */
3097                 log_debug("Trying to acquire PID from D-Bus name...");
3098
3099                 bus_query_pid(u->meta.manager, name);
3100         }
3101 }
3102
3103 static void service_bus_query_pid_done(
3104                 Unit *u,
3105                 const char *name,
3106                 pid_t pid) {
3107
3108         Service *s = SERVICE(u);
3109
3110         assert(s);
3111         assert(name);
3112
3113         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3114
3115         if (s->main_pid <= 0 &&
3116             (s->state == SERVICE_START ||
3117              s->state == SERVICE_START_POST ||
3118              s->state == SERVICE_RUNNING ||
3119              s->state == SERVICE_RELOAD))
3120                 service_set_main_pid(s, pid);
3121 }
3122
3123 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3124         assert(s);
3125         assert(fd >= 0);
3126
3127         /* This is called by the socket code when instantiating a new
3128          * service for a stream socket and the socket needs to be
3129          * configured. */
3130
3131         if (s->meta.load_state != UNIT_LOADED)
3132                 return -EINVAL;
3133
3134         if (s->socket_fd >= 0)
3135                 return -EBUSY;
3136
3137         if (s->state != SERVICE_DEAD)
3138                 return -EAGAIN;
3139
3140         s->socket_fd = fd;
3141         s->got_socket_fd = true;
3142         s->accept_socket = sock;
3143
3144         return 0;
3145 }
3146
3147 static void service_reset_failed(Unit *u) {
3148         Service *s = SERVICE(u);
3149
3150         assert(s);
3151
3152         if (s->state == SERVICE_FAILED)
3153                 service_set_state(s, SERVICE_DEAD);
3154
3155         s->failure = false;
3156 }
3157
3158 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3159         Service *s = SERVICE(u);
3160         int r = 0;
3161         Set *pid_set = NULL;
3162
3163         assert(s);
3164
3165         if (s->main_pid <= 0 && who == KILL_MAIN) {
3166                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3167                 return -EINVAL;
3168         }
3169
3170         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3171                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3172                 return -ENOENT;
3173         }
3174
3175         if (s->control_pid > 0)
3176                 if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0)
3177                         r = -errno;
3178
3179         if (s->main_pid > 0)
3180                 if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0)
3181                         r = -errno;
3182
3183         if (mode == KILL_CONTROL_GROUP) {
3184                 int q;
3185
3186                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3187                         return -ENOMEM;
3188
3189                 /* Exclude the control/main pid from being killed via the cgroup */
3190                 if (s->control_pid > 0)
3191                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3192                                 r = q;
3193                                 goto finish;
3194                         }
3195
3196                 if (s->main_pid > 0)
3197                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3198                                 r = q;
3199                                 goto finish;
3200                         }
3201
3202                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, pid_set)) < 0)
3203                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3204                                 r = q;
3205         }
3206
3207 finish:
3208         if (pid_set)
3209                 set_free(pid_set);
3210
3211         return r;
3212 }
3213
3214 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3215         [SERVICE_DEAD] = "dead",
3216         [SERVICE_START_PRE] = "start-pre",
3217         [SERVICE_START] = "start",
3218         [SERVICE_START_POST] = "start-post",
3219         [SERVICE_RUNNING] = "running",
3220         [SERVICE_EXITED] = "exited",
3221         [SERVICE_RELOAD] = "reload",
3222         [SERVICE_STOP] = "stop",
3223         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3224         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3225         [SERVICE_STOP_POST] = "stop-post",
3226         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3227         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3228         [SERVICE_FAILED] = "failed",
3229         [SERVICE_AUTO_RESTART] = "auto-restart",
3230 };
3231
3232 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3233
3234 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3235         [SERVICE_RESTART_NO] = "no",
3236         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3237         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3238         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3239         [SERVICE_RESTART_ALWAYS] = "always"
3240 };
3241
3242 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3243
3244 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3245         [SERVICE_SIMPLE] = "simple",
3246         [SERVICE_FORKING] = "forking",
3247         [SERVICE_ONESHOT] = "oneshot",
3248         [SERVICE_DBUS] = "dbus",
3249         [SERVICE_NOTIFY] = "notify"
3250 };
3251
3252 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3253
3254 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3255         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3256         [SERVICE_EXEC_START] = "ExecStart",
3257         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3258         [SERVICE_EXEC_RELOAD] = "ExecReload",
3259         [SERVICE_EXEC_STOP] = "ExecStop",
3260         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3261 };
3262
3263 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3264
3265 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3266         [NOTIFY_NONE] = "none",
3267         [NOTIFY_MAIN] = "main",
3268         [NOTIFY_ALL] = "all"
3269 };
3270
3271 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3272
3273 const UnitVTable service_vtable = {
3274         .suffix = ".service",
3275         .show_status = true,
3276
3277         .init = service_init,
3278         .done = service_done,
3279         .load = service_load,
3280
3281         .coldplug = service_coldplug,
3282
3283         .dump = service_dump,
3284
3285         .start = service_start,
3286         .stop = service_stop,
3287         .reload = service_reload,
3288
3289         .can_reload = service_can_reload,
3290
3291         .kill = service_kill,
3292
3293         .serialize = service_serialize,
3294         .deserialize_item = service_deserialize_item,
3295
3296         .active_state = service_active_state,
3297         .sub_state_to_string = service_sub_state_to_string,
3298
3299 #ifdef HAVE_SYSV_COMPAT
3300         .check_gc = service_check_gc,
3301 #endif
3302         .check_snapshot = service_check_snapshot,
3303
3304         .sigchld_event = service_sigchld_event,
3305         .timer_event = service_timer_event,
3306
3307         .reset_failed = service_reset_failed,
3308
3309         .cgroup_notify_empty = service_cgroup_notify_event,
3310         .notify_message = service_notify_message,
3311
3312         .bus_name_owner_change = service_bus_name_owner_change,
3313         .bus_query_pid_done = service_bus_query_pid_done,
3314
3315         .bus_interface = "org.freedesktop.systemd1.Service",
3316         .bus_message_handler = bus_service_message_handler,
3317         .bus_invalidating_properties =  bus_service_invalidating_properties,
3318
3319 #ifdef HAVE_SYSV_COMPAT
3320         .enumerate = service_enumerate
3321 #endif
3322 };