src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35 #include "special.h"
  36 #include "bus-errors.h"
  37
  38 #define COMMENTS "#;\n"
  39 #define NEWLINES "\n\r"
  40
  41 #ifdef HAVE_SYSV_COMPAT
  42
  43 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
  44
  45 typedef enum RunlevelType {
  46         RUNLEVEL_UP,
  47         RUNLEVEL_DOWN,
  48         RUNLEVEL_SYSINIT
  49 } RunlevelType;
  50
  51 static const struct {
  52         const char *path;
  53         const char *target;
  54         const RunlevelType type;
  55 } rcnd_table[] = {
  56         /* Standard SysV runlevels for start-up */
  57         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  58         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  59         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  60         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  61         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  62
  63 #ifdef TARGET_SUSE
  64         /* SUSE style boot.d */
  65         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  66 #endif
  67
  68 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_FRUGALWARE)
  69         /* Debian style rcS.d */
  70         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  71 #endif
  72
  73         /* Standard SysV runlevels for shutdown */
  74         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  75         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  76
  77         /* Note that the order here matters, as we read the
  78            directories in this order, and we want to make sure that
  79            sysv_start_priority is known when we first load the
  80            unit. And that value we only know from S links. Hence
  81            UP/SYSINIT must be read before DOWN */
  82 };
  83
  84 #define RUNLEVELS_UP "12345"
  85 /* #define RUNLEVELS_DOWN "06" */
  86 /* #define RUNLEVELS_BOOT "bBsS" */
  87 #endif
  88
  89 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  90         [SERVICE_DEAD] = UNIT_INACTIVE,
  91         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  92         [SERVICE_START] = UNIT_ACTIVATING,
  93         [SERVICE_START_POST] = UNIT_ACTIVATING,
  94         [SERVICE_RUNNING] = UNIT_ACTIVE,
  95         [SERVICE_EXITED] = UNIT_ACTIVE,
  96         [SERVICE_RELOAD] = UNIT_RELOADING,
  97         [SERVICE_STOP] = UNIT_DEACTIVATING,
  98         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 101         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 103         [SERVICE_FAILED] = UNIT_FAILED,
 104         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 105 };
 106
 107 static void service_init(Unit *u) {
 108         Service *s = SERVICE(u);
 109
 110         assert(u);
 111         assert(u->meta.load_state == UNIT_STUB);
 112
 113         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 114         s->restart_usec = DEFAULT_RESTART_USEC;
 115         s->timer_watch.type = WATCH_INVALID;
 116 #ifdef HAVE_SYSV_COMPAT
 117         s->sysv_start_priority = -1;
 118 #endif
 119         s->socket_fd = -1;
 120
 121         exec_context_init(&s->exec_context);
 122
 123         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 124
 125         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 126 }
 127
 128 static void service_unwatch_control_pid(Service *s) {
 129         assert(s);
 130
 131         if (s->control_pid <= 0)
 132                 return;
 133
 134         unit_unwatch_pid(UNIT(s), s->control_pid);
 135         s->control_pid = 0;
 136 }
 137
 138 static void service_unwatch_main_pid(Service *s) {
 139         assert(s);
 140
 141         if (s->main_pid <= 0)
 142                 return;
 143
 144         unit_unwatch_pid(UNIT(s), s->main_pid);
 145         s->main_pid = 0;
 146 }
 147
 148 static int service_set_main_pid(Service *s, pid_t pid) {
 149         pid_t ppid;
 150
 151         assert(s);
 152
 153         if (pid <= 1)
 154                 return -EINVAL;
 155
 156         if (pid == getpid())
 157                 return -EINVAL;
 158
 159         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 160                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 161                             s->meta.id, (unsigned long) pid);
 162
 163         s->main_pid = pid;
 164         s->main_pid_known = true;
 165
 166         exec_status_start(&s->main_exec_status, pid);
 167
 168         return 0;
 169 }
 170
 171 static void service_close_socket_fd(Service *s) {
 172         assert(s);
 173
 174         if (s->socket_fd < 0)
 175                 return;
 176
 177         close_nointr_nofail(s->socket_fd);
 178         s->socket_fd = -1;
 179 }
 180
 181 static void service_connection_unref(Service *s) {
 182         assert(s);
 183
 184         if (!s->accept_socket)
 185                 return;
 186
 187         socket_connection_unref(s->accept_socket);
 188         s->accept_socket = NULL;
 189 }
 190
 191 static void service_done(Unit *u) {
 192         Service *s = SERVICE(u);
 193
 194         assert(s);
 195
 196         free(s->pid_file);
 197         s->pid_file = NULL;
 198
 199 #ifdef HAVE_SYSV_COMPAT
 200         free(s->sysv_path);
 201         s->sysv_path = NULL;
 202
 203         free(s->sysv_runlevels);
 204         s->sysv_runlevels = NULL;
 205 #endif
 206
 207         free(s->status_text);
 208         s->status_text = NULL;
 209
 210         exec_context_done(&s->exec_context);
 211         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 212         s->control_command = NULL;
 213
 214         /* This will leak a process, but at least no memory or any of
 215          * our resources */
 216         service_unwatch_main_pid(s);
 217         service_unwatch_control_pid(s);
 218
 219         if (s->bus_name)  {
 220                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 221                 free(s->bus_name);
 222                 s->bus_name = NULL;
 223         }
 224
 225         service_close_socket_fd(s);
 226         service_connection_unref(s);
 227
 228         set_free(s->configured_sockets);
 229
 230         unit_unwatch_timer(u, &s->timer_watch);
 231 }
 232
 233 #ifdef HAVE_SYSV_COMPAT
 234 static char *sysv_translate_name(const char *name) {
 235         char *r;
 236
 237         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 238                 return NULL;
 239
 240         if (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 #ifdef TARGET_FRUGALWARE
 252         else if (startswith(name, "rc."))
 253                 /* Drop Frugalware-style rc. prefix */
 254                 strcpy(stpcpy(r, name + 3), ".service");
 255 #endif
 256         else
 257                 /* Normal init scripts */
 258                 strcpy(stpcpy(r, name), ".service");
 259
 260         return r;
 261 }
 262
 263 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 264
 265         /* We silently ignore the $ prefix here. According to the LSB
 266          * spec it simply indicates whether something is a
 267          * standardized name or a distribution-specific one. Since we
 268          * just follow what already exists and do not introduce new
 269          * uses or names we don't care who introduced a new name. */
 270
 271         static const char * const table[] = {
 272                 /* LSB defined facilities */
 273                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 274                 "network",              SPECIAL_NETWORK_TARGET,
 275                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 276                 "portmap",              SPECIAL_RPCBIND_TARGET,
 277                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 278                 "syslog",               SPECIAL_SYSLOG_TARGET,
 279                 "time",                 SPECIAL_RTC_SET_TARGET,
 280
 281                 /* common extensions */
 282                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 283                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 284                 "null",                 NULL,
 285
 286 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 287                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 288 #endif
 289
 290 #ifdef TARGET_FEDORA
 291                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 292                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 293                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 294 #endif
 295
 296 #ifdef TARGET_SUSE
 297                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 298 #endif
 299         };
 300
 301         unsigned i;
 302         char *r;
 303         const char *n;
 304
 305         assert(name);
 306         assert(_r);
 307
 308         n = *name == '$' ? name + 1 : name;
 309
 310         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 311
 312                 if (!streq(table[i], n))
 313                         continue;
 314
 315                 if (!table[i+1])
 316                         return 0;
 317
 318                 if (!(r = strdup(table[i+1])))
 319                         return -ENOMEM;
 320
 321                 goto finish;
 322         }
 323
 324         /* If we don't know this name, fallback heuristics to figure
 325          * out whether something is a target or a service alias. */
 326
 327         if (*name == '$')
 328                 /* Facilities starting with $ are most likely targets */
 329                 r = unit_name_build(n, NULL, ".target");
 330         else if (filename && streq(name, filename))
 331                 /* Names equalling the file name of the services are redundant */
 332                 return 0;
 333         else
 334                 /* Everything else we assume to be normal service names */
 335                 r = sysv_translate_name(n);
 336
 337         if (!r)
 338                 return -ENOMEM;
 339
 340 finish:
 341
 342         if (_r)
 343                 *_r = r;
 344
 345         return 1;
 346 }
 347
 348 static int sysv_fix_order(Service *s) {
 349         Meta *other;
 350         int r;
 351
 352         assert(s);
 353
 354         if (s->sysv_start_priority < 0)
 355                 return 0;
 356
 357         /* For each pair of services where at least one lacks a LSB
 358          * header, we use the start priority value to order things. */
 359
 360         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 361                 Service *t;
 362                 UnitDependency d;
 363                 bool special_s, special_t;
 364
 365                 t = (Service*) other;
 366
 367                 if (s == t)
 368                         continue;
 369
 370                 if (t->meta.load_state != UNIT_LOADED)
 371                         continue;
 372
 373                 if (t->sysv_start_priority < 0)
 374                         continue;
 375
 376                 /* If both units have modern headers we don't care
 377                  * about the priorities */
 378                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 379                     (t->meta.fragment_path || t->sysv_has_lsb))
 380                         continue;
 381
 382                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 383                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 384
 385                 if (special_t && !special_s)
 386                         d = UNIT_AFTER;
 387                 else if (special_s && !special_t)
 388                         d = UNIT_BEFORE;
 389                 else if (t->sysv_start_priority < s->sysv_start_priority)
 390                         d = UNIT_AFTER;
 391                 else if (t->sysv_start_priority > s->sysv_start_priority)
 392                         d = UNIT_BEFORE;
 393                 else
 394                         continue;
 395
 396                 /* FIXME: Maybe we should compare the name here lexicographically? */
 397
 398                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 399                         return r;
 400         }
 401
 402         return 0;
 403 }
 404
 405 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 406         ExecCommand *c;
 407
 408         if (!(c = new0(ExecCommand, 1)))
 409                 return NULL;
 410
 411         if (!(c->path = strdup(path))) {
 412                 free(c);
 413                 return NULL;
 414         }
 415
 416         if (!(c->argv = strv_new(path, arg1, NULL))) {
 417                 free(c->path);
 418                 free(c);
 419                 return NULL;
 420         }
 421
 422         return c;
 423 }
 424
 425 static int sysv_exec_commands(Service *s) {
 426         ExecCommand *c;
 427
 428         assert(s);
 429         assert(s->sysv_path);
 430
 431         if (!(c = exec_command_new(s->sysv_path, "start")))
 432                 return -ENOMEM;
 433         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 434
 435         if (!(c = exec_command_new(s->sysv_path, "stop")))
 436                 return -ENOMEM;
 437         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 438
 439         if (!(c = exec_command_new(s->sysv_path, "reload")))
 440                 return -ENOMEM;
 441         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 442
 443         return 0;
 444 }
 445
 446 static int service_load_sysv_path(Service *s, const char *path) {
 447         FILE *f;
 448         Unit *u;
 449         unsigned line = 0;
 450         int r;
 451         enum {
 452                 NORMAL,
 453                 DESCRIPTION,
 454                 LSB,
 455                 LSB_DESCRIPTION
 456         } state = NORMAL;
 457         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 458
 459         assert(s);
 460         assert(path);
 461
 462         u = UNIT(s);
 463
 464         if (!(f = fopen(path, "re"))) {
 465                 r = errno == ENOENT ? 0 : -errno;
 466                 goto finish;
 467         }
 468
 469         free(s->sysv_path);
 470         if (!(s->sysv_path = strdup(path))) {
 471                 r = -ENOMEM;
 472                 goto finish;
 473         }
 474
 475         while (!feof(f)) {
 476                 char l[LINE_MAX], *t;
 477
 478                 if (!fgets(l, sizeof(l), f)) {
 479                         if (feof(f))
 480                                 break;
 481
 482                         r = -errno;
 483                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 484                         goto finish;
 485                 }
 486
 487                 line++;
 488
 489                 t = strstrip(l);
 490                 if (*t != '#')
 491                         continue;
 492
 493                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 494                         state = LSB;
 495                         s->sysv_has_lsb = true;
 496                         continue;
 497                 }
 498
 499                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 500                         state = NORMAL;
 501                         continue;
 502                 }
 503
 504                 t++;
 505                 t += strspn(t, WHITESPACE);
 506
 507                 if (state == NORMAL) {
 508
 509                         /* Try to parse Red Hat style chkconfig headers */
 510
 511                         if (startswith_no_case(t, "chkconfig:")) {
 512                                 int start_priority;
 513                                 char runlevels[16], *k;
 514
 515                                 state = NORMAL;
 516
 517                                 if (sscanf(t+10, "%15s %i %*i",
 518                                            runlevels,
 519                                            &start_priority) != 2) {
 520
 521                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 522                                         continue;
 523                                 }
 524
 525                                 /* A start priority gathered from the
 526                                  * symlink farms is preferred over the
 527                                  * data from the LSB header. */
 528                                 if (start_priority < 0 || start_priority > 99)
 529                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 530                                 else if (s->sysv_start_priority < 0)
 531                                         s->sysv_start_priority = start_priority;
 532
 533                                 char_array_0(runlevels);
 534                                 k = delete_chars(runlevels, WHITESPACE "-");
 535
 536                                 if (k[0]) {
 537                                         char *d;
 538
 539                                         if (!(d = strdup(k))) {
 540                                                 r = -ENOMEM;
 541                                                 goto finish;
 542                                         }
 543
 544                                         free(s->sysv_runlevels);
 545                                         s->sysv_runlevels = d;
 546                                 }
 547
 548                         } else if (startswith_no_case(t, "description:")) {
 549
 550                                 size_t k = strlen(t);
 551                                 char *d;
 552                                 const char *j;
 553
 554                                 if (t[k-1] == '\\') {
 555                                         state = DESCRIPTION;
 556                                         t[k-1] = 0;
 557                                 }
 558
 559                                 if ((j = strstrip(t+12)) && *j) {
 560                                         if (!(d = strdup(j))) {
 561                                                 r = -ENOMEM;
 562                                                 goto finish;
 563                                         }
 564                                 } else
 565                                         d = NULL;
 566
 567                                 free(chkconfig_description);
 568                                 chkconfig_description = d;
 569
 570                         } else if (startswith_no_case(t, "pidfile:")) {
 571
 572                                 char *fn;
 573
 574                                 state = NORMAL;
 575
 576                                 fn = strstrip(t+8);
 577                                 if (!path_is_absolute(fn)) {
 578                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 579                                         continue;
 580                                 }
 581
 582                                 if (!(fn = strdup(fn))) {
 583                                         r = -ENOMEM;
 584                                         goto finish;
 585                                 }
 586
 587                                 free(s->pid_file);
 588                                 s->pid_file = fn;
 589                         }
 590
 591                 } else if (state == DESCRIPTION) {
 592
 593                         /* Try to parse Red Hat style description
 594                          * continuation */
 595
 596                         size_t k = strlen(t);
 597                         char *j;
 598
 599                         if (t[k-1] == '\\')
 600                                 t[k-1] = 0;
 601                         else
 602                                 state = NORMAL;
 603
 604                         if ((j = strstrip(t)) && *j) {
 605                                 char *d = NULL;
 606
 607                                 if (chkconfig_description)
 608                                         asprintf(&d, "%s %s", chkconfig_description, j);
 609                                 else
 610                                         d = strdup(j);
 611
 612                                 if (!d) {
 613                                         r = -ENOMEM;
 614                                         goto finish;
 615                                 }
 616
 617                                 free(chkconfig_description);
 618                                 chkconfig_description = d;
 619                         }
 620
 621                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 622
 623                         if (startswith_no_case(t, "Provides:")) {
 624                                 char *i, *w;
 625                                 size_t z;
 626
 627                                 state = LSB;
 628
 629                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 630                                         char *n, *m;
 631
 632                                         if (!(n = strndup(w, z))) {
 633                                                 r = -ENOMEM;
 634                                                 goto finish;
 635                                         }
 636
 637                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 638                                         free(n);
 639
 640                                         if (r < 0)
 641                                                 goto finish;
 642
 643                                         if (r == 0)
 644                                                 continue;
 645
 646                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 647                                                 r = unit_add_name(u, m);
 648                                         else {
 649                                                 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 650
 651                                                 if (s->sysv_enabled) {
 652                                                         int k;
 653
 654                                                         if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
 655                                                                 r = k;
 656                                                 }
 657                                         }
 658
 659                                         if (r < 0)
 660                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 661
 662                                         free(m);
 663                                 }
 664
 665                         } else if (startswith_no_case(t, "Required-Start:") ||
 666                                    startswith_no_case(t, "Should-Start:") ||
 667                                    startswith_no_case(t, "X-Start-Before:") ||
 668                                    startswith_no_case(t, "X-Start-After:")) {
 669                                 char *i, *w;
 670                                 size_t z;
 671
 672                                 state = LSB;
 673
 674                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 675                                         char *n, *m;
 676
 677                                         if (!(n = strndup(w, z))) {
 678                                                 r = -ENOMEM;
 679                                                 goto finish;
 680                                         }
 681
 682                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 683                                         free(n);
 684
 685                                         if (r < 0)
 686                                                 goto finish;
 687
 688                                         if (r == 0)
 689                                                 continue;
 690
 691                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 692
 693                                         if (r < 0)
 694                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 695
 696                                         free(m);
 697                                 }
 698                         } else if (startswith_no_case(t, "Default-Start:")) {
 699                                 char *k, *d;
 700
 701                                 state = LSB;
 702
 703                                 k = delete_chars(t+14, WHITESPACE "-");
 704
 705                                 if (k[0] != 0) {
 706                                         if (!(d = strdup(k))) {
 707                                                 r = -ENOMEM;
 708                                                 goto finish;
 709                                         }
 710
 711                                         free(s->sysv_runlevels);
 712                                         s->sysv_runlevels = d;
 713                                 }
 714
 715                         } else if (startswith_no_case(t, "Description:")) {
 716                                 char *d, *j;
 717
 718                                 state = LSB_DESCRIPTION;
 719
 720                                 if ((j = strstrip(t+12)) && *j) {
 721                                         if (!(d = strdup(j))) {
 722                                                 r = -ENOMEM;
 723                                                 goto finish;
 724                                         }
 725                                 } else
 726                                         d = NULL;
 727
 728                                 free(long_description);
 729                                 long_description = d;
 730
 731                         } else if (startswith_no_case(t, "Short-Description:")) {
 732                                 char *d, *j;
 733
 734                                 state = LSB;
 735
 736                                 if ((j = strstrip(t+18)) && *j) {
 737                                         if (!(d = strdup(j))) {
 738                                                 r = -ENOMEM;
 739                                                 goto finish;
 740                                         }
 741                                 } else
 742                                         d = NULL;
 743
 744                                 free(short_description);
 745                                 short_description = d;
 746
 747                         } else if (startswith_no_case(t, "X-Interactive:")) {
 748                                 int b;
 749
 750                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 751                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 752                                         continue;
 753                                 }
 754
 755                                 if (b)
 756                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 757                                 else
 758                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 759
 760                         } else if (state == LSB_DESCRIPTION) {
 761
 762                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 763                                         char *j;
 764
 765                                         if ((j = strstrip(t)) && *j) {
 766                                                 char *d = NULL;
 767
 768                                                 if (long_description)
 769                                                         asprintf(&d, "%s %s", long_description, t);
 770                                                 else
 771                                                         d = strdup(j);
 772
 773                                                 if (!d) {
 774                                                         r = -ENOMEM;
 775                                                         goto finish;
 776                                                 }
 777
 778                                                 free(long_description);
 779                                                 long_description = d;
 780                                         }
 781
 782                                 } else
 783                                         state = LSB;
 784                         }
 785                 }
 786         }
 787
 788         if ((r = sysv_exec_commands(s)) < 0)
 789                 goto finish;
 790
 791         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 792                 /* If there a runlevels configured for this service
 793                  * but none of the standard ones, then we assume this
 794                  * is some special kind of service (which might be
 795                  * needed for early boot) and don't create any links
 796                  * to it. */
 797
 798                 s->meta.default_dependencies = false;
 799
 800                 /* Don't timeout special services during boot (like fsck) */
 801                 s->timeout_usec = 0;
 802         } else
 803                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 804
 805         /* Special setting for all SysV services */
 806         s->type = SERVICE_FORKING;
 807         s->remain_after_exit = true;
 808         s->restart = SERVICE_RESTART_NO;
 809         s->exec_context.std_output =
 810                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 811                 ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL;
 812         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 813
 814         /* We use the long description only if
 815          * no short description is set. */
 816
 817         if (short_description)
 818                 description = short_description;
 819         else if (chkconfig_description)
 820                 description = chkconfig_description;
 821         else if (long_description)
 822                 description = long_description;
 823         else
 824                 description = NULL;
 825
 826         if (description) {
 827                 char *d;
 828
 829                 if (!(d = strappend("LSB: ", description))) {
 830                         r = -ENOMEM;
 831                         goto finish;
 832                 }
 833
 834                 u->meta.description = d;
 835         }
 836
 837         u->meta.load_state = UNIT_LOADED;
 838         r = 0;
 839
 840 finish:
 841
 842         if (f)
 843                 fclose(f);
 844
 845         free(short_description);
 846         free(long_description);
 847         free(chkconfig_description);
 848
 849         return r;
 850 }
 851
 852 static int service_load_sysv_name(Service *s, const char *name) {
 853         char **p;
 854
 855         assert(s);
 856         assert(name);
 857
 858         /* For SysV services we strip the boot.*, rc.* and *.sh
 859          * prefixes/suffixes. */
 860         if (startswith(name, "boot.") ||
 861             startswith(name, "rc.") ||
 862             endswith(name, ".sh.service"))
 863                 return -ENOENT;
 864
 865         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 866                 char *path;
 867                 int r;
 868
 869                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 870                         return -ENOMEM;
 871
 872                 assert(endswith(path, ".service"));
 873                 path[strlen(path)-8] = 0;
 874
 875                 r = service_load_sysv_path(s, path);
 876
 877 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 878                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 879                         /* Try Debian style *.sh source'able init scripts */
 880                         strcat(path, ".sh");
 881                         r = service_load_sysv_path(s, path);
 882                 }
 883 #endif
 884                 free(path);
 885
 886 #ifdef TARGET_SUSE
 887                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 888                         /* Try SUSE style boot.* init scripts */
 889
 890                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 891                                 return -ENOMEM;
 892
 893                         /* Drop .service suffix */
 894                         path[strlen(path)-8] = 0;
 895                         r = service_load_sysv_path(s, path);
 896                         free(path);
 897                 }
 898 #endif
 899
 900 #ifdef TARGET_FRUGALWARE
 901                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 902                         /* Try Frugalware style rc.* init scripts */
 903
 904                         if (asprintf(&path, "%s/rc.%s", *p, name) < 0)
 905                                 return -ENOMEM;
 906
 907                         /* Drop .service suffix */
 908                         path[strlen(path)-8] = 0;
 909                         r = service_load_sysv_path(s, path);
 910                         free(path);
 911                 }
 912 #endif
 913
 914                 if (r < 0)
 915                         return r;
 916
 917                 if ((s->meta.load_state != UNIT_STUB))
 918                         break;
 919         }
 920
 921         return 0;
 922 }
 923
 924 static int service_load_sysv(Service *s) {
 925         const char *t;
 926         Iterator i;
 927         int r;
 928
 929         assert(s);
 930
 931         /* Load service data from SysV init scripts, preferably with
 932          * LSB headers ... */
 933
 934         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 935                 return 0;
 936
 937         if ((t = s->meta.id))
 938                 if ((r = service_load_sysv_name(s, t)) < 0)
 939                         return r;
 940
 941         if (s->meta.load_state == UNIT_STUB)
 942                 SET_FOREACH(t, s->meta.names, i) {
 943                         if (t == s->meta.id)
 944                                 continue;
 945
 946                         if ((r = service_load_sysv_name(s, t)) < 0)
 947                                 return r;
 948
 949                         if (s->meta.load_state != UNIT_STUB)
 950                                 break;
 951                 }
 952
 953         return 0;
 954 }
 955 #endif
 956
 957 static int fsck_fix_order(Service *s) {
 958         Meta *other;
 959         int r;
 960
 961         assert(s);
 962
 963         if (s->fsck_passno <= 0)
 964                 return 0;
 965
 966         /* For each pair of services where both have an fsck priority
 967          * we order things based on it. */
 968
 969         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 970                 Service *t;
 971                 UnitDependency d;
 972
 973                 t = (Service*) other;
 974
 975                 if (s == t)
 976                         continue;
 977
 978                 if (t->meta.load_state != UNIT_LOADED)
 979                         continue;
 980
 981                 if (t->fsck_passno <= 0)
 982                         continue;
 983
 984                 if (t->fsck_passno < s->fsck_passno)
 985                         d = UNIT_AFTER;
 986                 else if (t->fsck_passno > s->fsck_passno)
 987                         d = UNIT_BEFORE;
 988                 else
 989                         continue;
 990
 991                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 992                         return r;
 993         }
 994
 995         return 0;
 996 }
 997
 998 static int service_verify(Service *s) {
 999         assert(s);
1000
1001         if (s->meta.load_state != UNIT_LOADED)
1002                 return 0;
1003
1004         if (!s->exec_command[SERVICE_EXEC_START]) {
1005                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1006                 return -EINVAL;
1007         }
1008
1009         if (s->type != SERVICE_ONESHOT &&
1010             s->exec_command[SERVICE_EXEC_START]->command_next) {
1011                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1012                 return -EINVAL;
1013         }
1014
1015         if (s->type == SERVICE_DBUS && !s->bus_name) {
1016                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1017                 return -EINVAL;
1018         }
1019
1020         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1021                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1022                 return -EINVAL;
1023         }
1024
1025         return 0;
1026 }
1027
1028 static int service_add_default_dependencies(Service *s) {
1029         int r;
1030
1031         assert(s);
1032
1033         /* Add a number of automatic dependencies useful for the
1034          * majority of services. */
1035
1036         /* First, pull in base system */
1037         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1038
1039                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1040                         return r;
1041
1042         } else if (s->meta.manager->running_as == MANAGER_USER) {
1043
1044                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1045                         return r;
1046         }
1047
1048         /* Second, activate normal shutdown */
1049         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1050 }
1051
1052 static int service_load(Unit *u) {
1053         int r;
1054         Service *s = SERVICE(u);
1055
1056         assert(s);
1057
1058         /* Load a .service file */
1059         if ((r = unit_load_fragment(u)) < 0)
1060                 return r;
1061
1062 #ifdef HAVE_SYSV_COMPAT
1063         /* Load a classic init script as a fallback, if we couldn't find anything */
1064         if (u->meta.load_state == UNIT_STUB)
1065                 if ((r = service_load_sysv(s)) < 0)
1066                         return r;
1067 #endif
1068
1069         /* Still nothing found? Then let's give up */
1070         if (u->meta.load_state == UNIT_STUB)
1071                 return -ENOENT;
1072
1073         /* We were able to load something, then let's add in the
1074          * dropin directories. */
1075         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1076                 return r;
1077
1078         /* This is a new unit? Then let's add in some extras */
1079         if (u->meta.load_state == UNIT_LOADED) {
1080                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1081                         return r;
1082
1083                 if ((r = unit_add_default_cgroups(u)) < 0)
1084                         return r;
1085
1086 #ifdef HAVE_SYSV_COMPAT
1087                 if ((r = sysv_fix_order(s)) < 0)
1088                         return r;
1089 #endif
1090
1091                 if ((r = fsck_fix_order(s)) < 0)
1092                         return r;
1093
1094                 if (s->bus_name)
1095                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1096                                 return r;
1097
1098                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1099                         s->notify_access = NOTIFY_MAIN;
1100
1101                 if (s->type == SERVICE_DBUS || s->bus_name)
1102                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1103                                 return r;
1104
1105                 if (s->meta.default_dependencies)
1106                         if ((r = service_add_default_dependencies(s)) < 0)
1107                                 return r;
1108         }
1109
1110         return service_verify(s);
1111 }
1112
1113 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1114
1115         ServiceExecCommand c;
1116         Service *s = SERVICE(u);
1117         const char *prefix2;
1118         char *p2;
1119
1120         assert(s);
1121
1122         p2 = strappend(prefix, "\t");
1123         prefix2 = p2 ? p2 : prefix;
1124
1125         fprintf(f,
1126                 "%sService State: %s\n"
1127                 "%sPermissionsStartOnly: %s\n"
1128                 "%sRootDirectoryStartOnly: %s\n"
1129                 "%sRemainAfterExit: %s\n"
1130                 "%sType: %s\n"
1131                 "%sRestart: %s\n"
1132                 "%sNotifyAccess: %s\n",
1133                 prefix, service_state_to_string(s->state),
1134                 prefix, yes_no(s->permissions_start_only),
1135                 prefix, yes_no(s->root_directory_start_only),
1136                 prefix, yes_no(s->remain_after_exit),
1137                 prefix, service_type_to_string(s->type),
1138                 prefix, service_restart_to_string(s->restart),
1139                 prefix, notify_access_to_string(s->notify_access));
1140
1141         if (s->control_pid > 0)
1142                 fprintf(f,
1143                         "%sControl PID: %lu\n",
1144                         prefix, (unsigned long) s->control_pid);
1145
1146         if (s->main_pid > 0)
1147                 fprintf(f,
1148                         "%sMain PID: %lu\n",
1149                         prefix, (unsigned long) s->main_pid);
1150
1151         if (s->pid_file)
1152                 fprintf(f,
1153                         "%sPIDFile: %s\n",
1154                         prefix, s->pid_file);
1155
1156         if (s->bus_name)
1157                 fprintf(f,
1158                         "%sBusName: %s\n"
1159                         "%sBus Name Good: %s\n",
1160                         prefix, s->bus_name,
1161                         prefix, yes_no(s->bus_name_good));
1162
1163         exec_context_dump(&s->exec_context, f, prefix);
1164
1165         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1166
1167                 if (!s->exec_command[c])
1168                         continue;
1169
1170                 fprintf(f, "%s-> %s:\n",
1171                         prefix, service_exec_command_to_string(c));
1172
1173                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1174         }
1175
1176 #ifdef HAVE_SYSV_COMPAT
1177         if (s->sysv_path)
1178                 fprintf(f,
1179                         "%sSysV Init Script Path: %s\n"
1180                         "%sSysV Init Script has LSB Header: %s\n"
1181                         "%sSysVEnabled: %s\n",
1182                         prefix, s->sysv_path,
1183                         prefix, yes_no(s->sysv_has_lsb),
1184                         prefix, yes_no(s->sysv_enabled));
1185
1186         if (s->sysv_start_priority >= 0)
1187                 fprintf(f,
1188                         "%sSysVStartPriority: %i\n",
1189                         prefix, s->sysv_start_priority);
1190
1191         if (s->sysv_runlevels)
1192                 fprintf(f, "%sSysVRunLevels: %s\n",
1193                         prefix, s->sysv_runlevels);
1194 #endif
1195
1196         if (s->fsck_passno > 0)
1197                 fprintf(f,
1198                         "%sFsckPassNo: %i\n",
1199                         prefix, s->fsck_passno);
1200
1201         if (s->status_text)
1202                 fprintf(f, "%sStatus Text: %s\n",
1203                         prefix, s->status_text);
1204
1205         free(p2);
1206 }
1207
1208 static int service_load_pid_file(Service *s) {
1209         char *k;
1210         int r;
1211         pid_t pid;
1212
1213         assert(s);
1214
1215         if (s->main_pid_known)
1216                 return 0;
1217
1218         assert(s->main_pid <= 0);
1219
1220         if (!s->pid_file)
1221                 return -ENOENT;
1222
1223         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1224                 return r;
1225
1226         r = parse_pid(k, &pid);
1227         free(k);
1228
1229         if (r < 0)
1230                 return r;
1231
1232         if (kill(pid, 0) < 0 && errno != EPERM) {
1233                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1234                             (unsigned long) pid, s->pid_file);
1235                 return -ESRCH;
1236         }
1237
1238         if ((r = service_set_main_pid(s, pid)) < 0)
1239                 return r;
1240
1241         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1242                 /* FIXME: we need to do something here */
1243                 return r;
1244
1245         return 0;
1246 }
1247
1248 static int service_search_main_pid(Service *s) {
1249         pid_t pid;
1250         int r;
1251
1252         assert(s);
1253
1254         if (s->main_pid_known)
1255                 return 0;
1256
1257         assert(s->main_pid <= 0);
1258
1259         if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1260                 return -ENOENT;
1261
1262         if ((r = service_set_main_pid(s, pid)) < 0)
1263                 return r;
1264
1265         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1266                 /* FIXME: we need to do something here */
1267                 return r;
1268
1269         return 0;
1270 }
1271
1272 static int service_get_sockets(Service *s, Set **_set) {
1273         Set *set;
1274         Iterator i;
1275         char *t;
1276         int r;
1277
1278         assert(s);
1279         assert(_set);
1280
1281         if (s->socket_fd >= 0)
1282                 return 0;
1283
1284         if (!set_isempty(s->configured_sockets))
1285                 return 0;
1286
1287         /* Collects all Socket objects that belong to this
1288          * service. Note that a service might have multiple sockets
1289          * via multiple names. */
1290
1291         if (!(set = set_new(NULL, NULL)))
1292                 return -ENOMEM;
1293
1294         SET_FOREACH(t, s->meta.names, i) {
1295                 char *k;
1296                 Unit *p;
1297
1298                 /* Look for all socket objects that go by any of our
1299                  * units and collect their fds */
1300
1301                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1302                         r = -ENOMEM;
1303                         goto fail;
1304                 }
1305
1306                 p = manager_get_unit(s->meta.manager, k);
1307                 free(k);
1308
1309                 if (!p)
1310                         continue;
1311
1312                 if ((r = set_put(set, p)) < 0)
1313                         goto fail;
1314         }
1315
1316         *_set = set;
1317         return 0;
1318
1319 fail:
1320         set_free(set);
1321         return r;
1322 }
1323
1324 static int service_notify_sockets_dead(Service *s) {
1325         Iterator i;
1326         Set *set, *free_set = NULL;
1327         Socket *sock;
1328         int r;
1329
1330         assert(s);
1331
1332         /* Notifies all our sockets when we die */
1333
1334         if (s->socket_fd >= 0)
1335                 return 0;
1336
1337         if (!set_isempty(s->configured_sockets))
1338                 set = s->configured_sockets;
1339         else {
1340                 if ((r = service_get_sockets(s, &free_set)) < 0)
1341                         return r;
1342
1343                 set = free_set;
1344         }
1345
1346         SET_FOREACH(sock, set, i)
1347                 socket_notify_service_dead(sock);
1348
1349         set_free(free_set);
1350
1351         return 0;
1352 }
1353
1354 static void service_set_state(Service *s, ServiceState state) {
1355         ServiceState old_state;
1356         assert(s);
1357
1358         old_state = s->state;
1359         s->state = state;
1360
1361         if (state != SERVICE_START_PRE &&
1362             state != SERVICE_START &&
1363             state != SERVICE_START_POST &&
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_AUTO_RESTART)
1372                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1373
1374         if (state != SERVICE_START &&
1375             state != SERVICE_START_POST &&
1376             state != SERVICE_RUNNING &&
1377             state != SERVICE_RELOAD &&
1378             state != SERVICE_STOP &&
1379             state != SERVICE_STOP_SIGTERM &&
1380             state != SERVICE_STOP_SIGKILL)
1381                 service_unwatch_main_pid(s);
1382
1383         if (state != SERVICE_START_PRE &&
1384             state != SERVICE_START &&
1385             state != SERVICE_START_POST &&
1386             state != SERVICE_RELOAD &&
1387             state != SERVICE_STOP &&
1388             state != SERVICE_STOP_SIGTERM &&
1389             state != SERVICE_STOP_SIGKILL &&
1390             state != SERVICE_STOP_POST &&
1391             state != SERVICE_FINAL_SIGTERM &&
1392             state != SERVICE_FINAL_SIGKILL) {
1393                 service_unwatch_control_pid(s);
1394                 s->control_command = NULL;
1395                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1396         }
1397
1398         if (state == SERVICE_DEAD ||
1399             state == SERVICE_STOP ||
1400             state == SERVICE_STOP_SIGTERM ||
1401             state == SERVICE_STOP_SIGKILL ||
1402             state == SERVICE_STOP_POST ||
1403             state == SERVICE_FINAL_SIGTERM ||
1404             state == SERVICE_FINAL_SIGKILL ||
1405             state == SERVICE_FAILED ||
1406             state == SERVICE_AUTO_RESTART)
1407                 service_notify_sockets_dead(s);
1408
1409         if (state != SERVICE_START_PRE &&
1410             state != SERVICE_START &&
1411             state != SERVICE_START_POST &&
1412             state != SERVICE_RUNNING &&
1413             state != SERVICE_RELOAD &&
1414             state != SERVICE_STOP &&
1415             state != SERVICE_STOP_SIGTERM &&
1416             state != SERVICE_STOP_SIGKILL &&
1417             state != SERVICE_STOP_POST &&
1418             state != SERVICE_FINAL_SIGTERM &&
1419             state != SERVICE_FINAL_SIGKILL &&
1420             !(state == SERVICE_DEAD && s->meta.job)) {
1421                 service_close_socket_fd(s);
1422                 service_connection_unref(s);
1423         }
1424
1425         /* For the inactive states unit_notify() will trim the cgroup,
1426          * but for exit we have to do that ourselves... */
1427         if (state == SERVICE_EXITED)
1428                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1429
1430         if (old_state != state)
1431                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1432
1433         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1434 }
1435
1436 static int service_coldplug(Unit *u) {
1437         Service *s = SERVICE(u);
1438         int r;
1439
1440         assert(s);
1441         assert(s->state == SERVICE_DEAD);
1442
1443         if (s->deserialized_state != s->state) {
1444
1445                 if (s->deserialized_state == SERVICE_START_PRE ||
1446                     s->deserialized_state == SERVICE_START ||
1447                     s->deserialized_state == SERVICE_START_POST ||
1448                     s->deserialized_state == SERVICE_RELOAD ||
1449                     s->deserialized_state == SERVICE_STOP ||
1450                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1451                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1452                     s->deserialized_state == SERVICE_STOP_POST ||
1453                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1454                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1455                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1456
1457                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1458                                 usec_t k;
1459
1460                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1461
1462                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1463                                         return r;
1464                         }
1465                 }
1466
1467                 if ((s->deserialized_state == SERVICE_START &&
1468                      (s->type == SERVICE_FORKING ||
1469                       s->type == SERVICE_DBUS ||
1470                       s->type == SERVICE_ONESHOT ||
1471                       s->type == SERVICE_NOTIFY)) ||
1472                     s->deserialized_state == SERVICE_START_POST ||
1473                     s->deserialized_state == SERVICE_RUNNING ||
1474                     s->deserialized_state == SERVICE_RELOAD ||
1475                     s->deserialized_state == SERVICE_STOP ||
1476                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1477                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1478                         if (s->main_pid > 0)
1479                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1480                                         return r;
1481
1482                 if (s->deserialized_state == SERVICE_START_PRE ||
1483                     s->deserialized_state == SERVICE_START ||
1484                     s->deserialized_state == SERVICE_START_POST ||
1485                     s->deserialized_state == SERVICE_RELOAD ||
1486                     s->deserialized_state == SERVICE_STOP ||
1487                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1488                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1489                     s->deserialized_state == SERVICE_STOP_POST ||
1490                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1491                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1492                         if (s->control_pid > 0)
1493                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1494                                         return r;
1495
1496                 service_set_state(s, s->deserialized_state);
1497         }
1498
1499         return 0;
1500 }
1501
1502 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1503         Iterator i;
1504         int r;
1505         int *rfds = NULL;
1506         unsigned rn_fds = 0;
1507         Set *set, *free_set = NULL;
1508         Socket *sock;
1509
1510         assert(s);
1511         assert(fds);
1512         assert(n_fds);
1513
1514         if (s->socket_fd >= 0)
1515                 return 0;
1516
1517         if (!set_isempty(s->configured_sockets))
1518                 set = s->configured_sockets;
1519         else {
1520                 if ((r = service_get_sockets(s, &free_set)) < 0)
1521                         return r;
1522
1523                 set = free_set;
1524         }
1525
1526         SET_FOREACH(sock, set, i) {
1527                 int *cfds;
1528                 unsigned cn_fds;
1529
1530                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1531                         goto fail;
1532
1533                 if (!cfds)
1534                         continue;
1535
1536                 if (!rfds) {
1537                         rfds = cfds;
1538                         rn_fds = cn_fds;
1539                 } else {
1540                         int *t;
1541
1542                         if (!(t = new(int, rn_fds+cn_fds))) {
1543                                 free(cfds);
1544                                 r = -ENOMEM;
1545                                 goto fail;
1546                         }
1547
1548                         memcpy(t, rfds, rn_fds);
1549                         memcpy(t+rn_fds, cfds, cn_fds);
1550                         free(rfds);
1551                         free(cfds);
1552
1553                         rfds = t;
1554                         rn_fds = rn_fds+cn_fds;
1555                 }
1556         }
1557
1558         *fds = rfds;
1559         *n_fds = rn_fds;
1560
1561         set_free(free_set);
1562
1563         return 0;
1564
1565 fail:
1566         set_free(set);
1567         free(rfds);
1568
1569         return r;
1570 }
1571
1572 static int service_spawn(
1573                 Service *s,
1574                 ExecCommand *c,
1575                 bool timeout,
1576                 bool pass_fds,
1577                 bool apply_permissions,
1578                 bool apply_chroot,
1579                 bool apply_tty_stdin,
1580                 bool set_notify_socket,
1581                 pid_t *_pid) {
1582
1583         pid_t pid;
1584         int r;
1585         int *fds = NULL, *fdsbuf = NULL;
1586         unsigned n_fds = 0, n_env = 0;
1587         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1588
1589         assert(s);
1590         assert(c);
1591         assert(_pid);
1592
1593         if (pass_fds ||
1594             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1595             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1596             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1597
1598                 if (s->socket_fd >= 0) {
1599                         fds = &s->socket_fd;
1600                         n_fds = 1;
1601                 } else {
1602                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1603                                 goto fail;
1604
1605                         fds = fdsbuf;
1606                 }
1607         }
1608
1609         if (timeout && s->timeout_usec) {
1610                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1611                         goto fail;
1612         } else
1613                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1614
1615         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1616                 r = -ENOMEM;
1617                 goto fail;
1618         }
1619
1620         if (!(our_env = new0(char*, 4))) {
1621                 r = -ENOMEM;
1622                 goto fail;
1623         }
1624
1625         if (set_notify_socket)
1626                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1627                         r = -ENOMEM;
1628                         goto fail;
1629                 }
1630
1631         if (s->main_pid > 0)
1632                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1633                         r = -ENOMEM;
1634                         goto fail;
1635                 }
1636
1637         if (!(final_env = strv_env_merge(2,
1638                                          s->meta.manager->environment,
1639                                          our_env,
1640                                          NULL))) {
1641                 r = -ENOMEM;
1642                 goto fail;
1643         }
1644
1645         r = exec_spawn(c,
1646                        argv,
1647                        &s->exec_context,
1648                        fds, n_fds,
1649                        final_env,
1650                        apply_permissions,
1651                        apply_chroot,
1652                        apply_tty_stdin,
1653                        s->meta.manager->confirm_spawn,
1654                        s->meta.cgroup_bondings,
1655                        &pid);
1656
1657         if (r < 0)
1658                 goto fail;
1659
1660
1661         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1662                 /* FIXME: we need to do something here */
1663                 goto fail;
1664
1665         free(fdsbuf);
1666         strv_free(argv);
1667         strv_free(our_env);
1668         strv_free(final_env);
1669
1670         *_pid = pid;
1671
1672         return 0;
1673
1674 fail:
1675         free(fdsbuf);
1676         strv_free(argv);
1677         strv_free(our_env);
1678         strv_free(final_env);
1679
1680         if (timeout)
1681                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1682
1683         return r;
1684 }
1685
1686 static int main_pid_good(Service *s) {
1687         assert(s);
1688
1689         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1690          * don't know */
1691
1692         /* If we know the pid file, then lets just check if it is
1693          * still valid */
1694         if (s->main_pid_known)
1695                 return s->main_pid > 0;
1696
1697         /* We don't know the pid */
1698         return -EAGAIN;
1699 }
1700
1701 static int control_pid_good(Service *s) {
1702         assert(s);
1703
1704         return s->control_pid > 0;
1705 }
1706
1707 static int cgroup_good(Service *s) {
1708         int r;
1709
1710         assert(s);
1711
1712         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1713                 return r;
1714
1715         return !r;
1716 }
1717
1718 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1719         int r;
1720         assert(s);
1721
1722         if (!success)
1723                 s->failure = true;
1724
1725         if (allow_restart &&
1726             !s->forbid_restart &&
1727             (s->restart == SERVICE_RESTART_ALWAYS ||
1728              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1729              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1730              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1731               (s->main_exec_status.code == CLD_KILLED ||
1732                s->main_exec_status.code == CLD_DUMPED)))) {
1733
1734                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1735                         goto fail;
1736
1737                 service_set_state(s, SERVICE_AUTO_RESTART);
1738         } else
1739                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1740
1741         s->forbid_restart = false;
1742
1743         return;
1744
1745 fail:
1746         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1747         service_enter_dead(s, false, false);
1748 }
1749
1750 static void service_enter_signal(Service *s, ServiceState state, bool success);
1751
1752 static void service_enter_stop_post(Service *s, bool success) {
1753         int r;
1754         assert(s);
1755
1756         if (!success)
1757                 s->failure = true;
1758
1759         service_unwatch_control_pid(s);
1760
1761         s->control_command_id = SERVICE_EXEC_STOP_POST;
1762         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1763                 if ((r = service_spawn(s,
1764                                        s->control_command,
1765                                        true,
1766                                        false,
1767                                        !s->permissions_start_only,
1768                                        !s->root_directory_start_only,
1769                                        true,
1770                                        false,
1771                                        &s->control_pid)) < 0)
1772                         goto fail;
1773
1774
1775                 service_set_state(s, SERVICE_STOP_POST);
1776         } else
1777                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1778
1779         return;
1780
1781 fail:
1782         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1783         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1784 }
1785
1786 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1787         int r;
1788         Set *pid_set = NULL;
1789         bool wait_for_exit = false;
1790
1791         assert(s);
1792
1793         if (!success)
1794                 s->failure = true;
1795
1796         if (s->exec_context.kill_mode != KILL_NONE) {
1797                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1798
1799                 if (s->main_pid > 0) {
1800                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1801                                  -s->main_pid :
1802                                  s->main_pid, sig) < 0 && errno != ESRCH)
1803
1804                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1805                         else
1806                                 wait_for_exit = true;
1807                 }
1808
1809                 if (s->control_pid > 0) {
1810                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1811                                  -s->control_pid :
1812                                  s->control_pid, sig) < 0 && errno != ESRCH)
1813
1814                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1815                         else
1816                                 wait_for_exit = true;
1817                 }
1818
1819                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1820
1821                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1822                                 r = -ENOMEM;
1823                                 goto fail;
1824                         }
1825
1826                         /* Exclude the main/control pids from being killed via the cgroup */
1827                         if (s->main_pid > 0)
1828                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1829                                         goto fail;
1830
1831                         if (s->control_pid > 0)
1832                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1833                                         goto fail;
1834
1835                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1836                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1837                                         log_warning("Failed to kill control group: %s", strerror(-r));
1838                         } else if (r > 0)
1839                                 wait_for_exit = true;
1840
1841                         set_free(pid_set);
1842                 }
1843         }
1844
1845         if (wait_for_exit) {
1846                 if (s->timeout_usec > 0)
1847                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1848                                 goto fail;
1849
1850                 service_set_state(s, state);
1851         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1852                 service_enter_stop_post(s, true);
1853         else
1854                 service_enter_dead(s, true, true);
1855
1856         return;
1857
1858 fail:
1859         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1860
1861         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1862                 service_enter_stop_post(s, false);
1863         else
1864                 service_enter_dead(s, false, true);
1865
1866         if (pid_set)
1867                 set_free(pid_set);
1868 }
1869
1870 static void service_enter_stop(Service *s, bool success) {
1871         int r;
1872
1873         assert(s);
1874
1875         if (!success)
1876                 s->failure = true;
1877
1878         service_unwatch_control_pid(s);
1879
1880         s->control_command_id = SERVICE_EXEC_STOP;
1881         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1882                 if ((r = service_spawn(s,
1883                                        s->control_command,
1884                                        true,
1885                                        false,
1886                                        !s->permissions_start_only,
1887                                        !s->root_directory_start_only,
1888                                        false,
1889                                        false,
1890                                        &s->control_pid)) < 0)
1891                         goto fail;
1892
1893                 service_set_state(s, SERVICE_STOP);
1894         } else
1895                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1896
1897         return;
1898
1899 fail:
1900         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1901         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1902 }
1903
1904 static void service_enter_running(Service *s, bool success) {
1905         int main_pid_ok, cgroup_ok;
1906         assert(s);
1907
1908         if (!success)
1909                 s->failure = true;
1910
1911         main_pid_ok = main_pid_good(s);
1912         cgroup_ok = cgroup_good(s);
1913
1914         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1915             (s->bus_name_good || s->type != SERVICE_DBUS))
1916                 service_set_state(s, SERVICE_RUNNING);
1917         else if (s->remain_after_exit)
1918                 service_set_state(s, SERVICE_EXITED);
1919         else
1920                 service_enter_stop(s, true);
1921 }
1922
1923 static void service_enter_start_post(Service *s) {
1924         int r;
1925         assert(s);
1926
1927         service_unwatch_control_pid(s);
1928
1929         s->control_command_id = SERVICE_EXEC_START_POST;
1930         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1931                 if ((r = service_spawn(s,
1932                                        s->control_command,
1933                                        true,
1934                                        false,
1935                                        !s->permissions_start_only,
1936                                        !s->root_directory_start_only,
1937                                        false,
1938                                        false,
1939                                        &s->control_pid)) < 0)
1940                         goto fail;
1941
1942                 service_set_state(s, SERVICE_START_POST);
1943         } else
1944                 service_enter_running(s, true);
1945
1946         return;
1947
1948 fail:
1949         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1950         service_enter_stop(s, false);
1951 }
1952
1953 static void service_enter_start(Service *s) {
1954         pid_t pid;
1955         int r;
1956
1957         assert(s);
1958
1959         assert(s->exec_command[SERVICE_EXEC_START]);
1960         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1961
1962         if (s->type == SERVICE_FORKING)
1963                 service_unwatch_control_pid(s);
1964         else
1965                 service_unwatch_main_pid(s);
1966
1967         s->control_command_id = SERVICE_EXEC_START;
1968         s->control_command = s->exec_command[SERVICE_EXEC_START];
1969
1970         if ((r = service_spawn(s,
1971                                s->control_command,
1972                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1973                                true,
1974                                true,
1975                                true,
1976                                true,
1977                                s->notify_access != NOTIFY_NONE,
1978                                &pid)) < 0)
1979                 goto fail;
1980
1981         if (s->type == SERVICE_SIMPLE) {
1982                 /* For simple services we immediately start
1983                  * the START_POST binaries. */
1984
1985                 service_set_main_pid(s, pid);
1986                 service_enter_start_post(s);
1987
1988         } else  if (s->type == SERVICE_FORKING) {
1989
1990                 /* For forking services we wait until the start
1991                  * process exited. */
1992
1993                 s->control_pid = pid;
1994                 service_set_state(s, SERVICE_START);
1995
1996         } else if (s->type == SERVICE_ONESHOT ||
1997                    s->type == SERVICE_DBUS ||
1998                    s->type == SERVICE_NOTIFY) {
1999
2000                 /* For oneshot services we wait until the start
2001                  * process exited, too, but it is our main process. */
2002
2003                 /* For D-Bus services we know the main pid right away,
2004                  * but wait for the bus name to appear on the
2005                  * bus. Notify services are similar. */
2006
2007                 service_set_main_pid(s, pid);
2008                 service_set_state(s, SERVICE_START);
2009         } else
2010                 assert_not_reached("Unknown service type");
2011
2012         return;
2013
2014 fail:
2015         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2016         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2017 }
2018
2019 static void service_enter_start_pre(Service *s) {
2020         int r;
2021
2022         assert(s);
2023
2024         service_unwatch_control_pid(s);
2025
2026         s->control_command_id = SERVICE_EXEC_START_PRE;
2027         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2028                 if ((r = service_spawn(s,
2029                                        s->control_command,
2030                                        true,
2031                                        false,
2032                                        !s->permissions_start_only,
2033                                        !s->root_directory_start_only,
2034                                        true,
2035                                        false,
2036                                        &s->control_pid)) < 0)
2037                         goto fail;
2038
2039                 service_set_state(s, SERVICE_START_PRE);
2040         } else
2041                 service_enter_start(s);
2042
2043         return;
2044
2045 fail:
2046         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2047         service_enter_dead(s, false, true);
2048 }
2049
2050 static void service_enter_restart(Service *s) {
2051         int r;
2052         DBusError error;
2053
2054         assert(s);
2055         dbus_error_init(&error);
2056
2057         if (s->meta.job) {
2058                 log_info("Job pending for unit, delaying automatic restart.");
2059
2060                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2061                         goto fail;
2062         }
2063
2064         service_enter_dead(s, true, false);
2065
2066         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2067                 goto fail;
2068
2069         log_debug("%s scheduled restart job.", s->meta.id);
2070         return;
2071
2072 fail:
2073         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2074         service_enter_dead(s, false, false);
2075
2076         dbus_error_free(&error);
2077 }
2078
2079 static void service_enter_reload(Service *s) {
2080         int r;
2081
2082         assert(s);
2083
2084         service_unwatch_control_pid(s);
2085
2086         s->control_command_id = SERVICE_EXEC_RELOAD;
2087         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2088                 if ((r = service_spawn(s,
2089                                        s->control_command,
2090                                        true,
2091                                        false,
2092                                        !s->permissions_start_only,
2093                                        !s->root_directory_start_only,
2094                                        false,
2095                                        false,
2096                                        &s->control_pid)) < 0)
2097                         goto fail;
2098
2099                 service_set_state(s, SERVICE_RELOAD);
2100         } else
2101                 service_enter_running(s, true);
2102
2103         return;
2104
2105 fail:
2106         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2107         service_enter_stop(s, false);
2108 }
2109
2110 static void service_run_next_control(Service *s, bool success) {
2111         int r;
2112
2113         assert(s);
2114         assert(s->control_command);
2115         assert(s->control_command->command_next);
2116
2117         if (!success)
2118                 s->failure = true;
2119
2120         assert(s->control_command_id != SERVICE_EXEC_START);
2121
2122         s->control_command = s->control_command->command_next;
2123         service_unwatch_control_pid(s);
2124
2125         if ((r = service_spawn(s,
2126                                s->control_command,
2127                                true,
2128                                false,
2129                                !s->permissions_start_only,
2130                                !s->root_directory_start_only,
2131                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2132                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2133                                false,
2134                                &s->control_pid)) < 0)
2135                 goto fail;
2136
2137         return;
2138
2139 fail:
2140         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2141
2142         if (s->state == SERVICE_START_PRE)
2143                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2144         else if (s->state == SERVICE_STOP)
2145                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2146         else if (s->state == SERVICE_STOP_POST)
2147                 service_enter_dead(s, false, true);
2148         else
2149                 service_enter_stop(s, false);
2150 }
2151
2152 static void service_run_next_main(Service *s, bool success) {
2153         pid_t pid;
2154         int r;
2155
2156         assert(s);
2157         assert(s->control_command);
2158         assert(s->control_command->command_next);
2159
2160         if (!success)
2161                 s->failure = true;
2162
2163         assert(s->control_command_id == SERVICE_EXEC_START);
2164         assert(s->type == SERVICE_ONESHOT);
2165
2166         s->control_command = s->control_command->command_next;
2167         service_unwatch_main_pid(s);
2168
2169         if ((r = service_spawn(s,
2170                                s->control_command,
2171                                false,
2172                                true,
2173                                true,
2174                                true,
2175                                true,
2176                                s->notify_access != NOTIFY_NONE,
2177                                &pid)) < 0)
2178                 goto fail;
2179
2180         service_set_main_pid(s, pid);
2181
2182         return;
2183
2184 fail:
2185         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2186         service_enter_stop(s, false);
2187 }
2188
2189 static int service_start(Unit *u) {
2190         Service *s = SERVICE(u);
2191
2192         assert(s);
2193
2194         /* We cannot fulfill this request right now, try again later
2195          * please! */
2196         if (s->state == SERVICE_STOP ||
2197             s->state == SERVICE_STOP_SIGTERM ||
2198             s->state == SERVICE_STOP_SIGKILL ||
2199             s->state == SERVICE_STOP_POST ||
2200             s->state == SERVICE_FINAL_SIGTERM ||
2201             s->state == SERVICE_FINAL_SIGKILL)
2202                 return -EAGAIN;
2203
2204         /* Already on it! */
2205         if (s->state == SERVICE_START_PRE ||
2206             s->state == SERVICE_START ||
2207             s->state == SERVICE_START_POST)
2208                 return 0;
2209
2210         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2211
2212         /* Make sure we don't enter a busy loop of some kind. */
2213         if (!ratelimit_test(&s->ratelimit)) {
2214                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2215                 return -ECANCELED;
2216         }
2217
2218         s->failure = false;
2219         s->main_pid_known = false;
2220         s->forbid_restart = false;
2221
2222         service_enter_start_pre(s);
2223         return 0;
2224 }
2225
2226 static int service_stop(Unit *u) {
2227         Service *s = SERVICE(u);
2228
2229         assert(s);
2230
2231         /* This is a user request, so don't do restarts on this
2232          * shutdown. */
2233         s->forbid_restart = true;
2234
2235         /* Already on it */
2236         if (s->state == SERVICE_STOP ||
2237             s->state == SERVICE_STOP_SIGTERM ||
2238             s->state == SERVICE_STOP_SIGKILL ||
2239             s->state == SERVICE_STOP_POST ||
2240             s->state == SERVICE_FINAL_SIGTERM ||
2241             s->state == SERVICE_FINAL_SIGKILL)
2242                 return 0;
2243
2244         /* Don't allow a restart */
2245         if (s->state == SERVICE_AUTO_RESTART) {
2246                 service_set_state(s, SERVICE_DEAD);
2247                 return 0;
2248         }
2249
2250         /* If there's already something running we go directly into
2251          * kill mode. */
2252         if (s->state == SERVICE_START_PRE ||
2253             s->state == SERVICE_START ||
2254             s->state == SERVICE_START_POST ||
2255             s->state == SERVICE_RELOAD) {
2256                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2257                 return 0;
2258         }
2259
2260         assert(s->state == SERVICE_RUNNING ||
2261                s->state == SERVICE_EXITED);
2262
2263         service_enter_stop(s, true);
2264         return 0;
2265 }
2266
2267 static int service_reload(Unit *u) {
2268         Service *s = SERVICE(u);
2269
2270         assert(s);
2271
2272         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2273
2274         service_enter_reload(s);
2275         return 0;
2276 }
2277
2278 static bool service_can_reload(Unit *u) {
2279         Service *s = SERVICE(u);
2280
2281         assert(s);
2282
2283         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2284 }
2285
2286 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2287         Service *s = SERVICE(u);
2288
2289         assert(u);
2290         assert(f);
2291         assert(fds);
2292
2293         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2294         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2295
2296         if (s->control_pid > 0)
2297                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2298
2299         if (s->main_pid_known && s->main_pid > 0)
2300                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2301
2302         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2303
2304         if (s->status_text)
2305                 unit_serialize_item(u, f, "status-text", s->status_text);
2306
2307         /* There's a minor uncleanliness here: if there are multiple
2308          * commands attached here, we will start from the first one
2309          * again */
2310         if (s->control_command_id >= 0)
2311                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2312
2313         if (s->socket_fd >= 0) {
2314                 int copy;
2315
2316                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2317                         return copy;
2318
2319                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2320         }
2321
2322         if (s->main_exec_status.pid > 0) {
2323                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2324                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2325                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2326
2327                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2328                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2329                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2330                 }
2331         }
2332
2333         return 0;
2334 }
2335
2336 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2337         Service *s = SERVICE(u);
2338
2339         assert(u);
2340         assert(key);
2341         assert(value);
2342         assert(fds);
2343
2344         if (streq(key, "state")) {
2345                 ServiceState state;
2346
2347                 if ((state = service_state_from_string(value)) < 0)
2348                         log_debug("Failed to parse state value %s", value);
2349                 else
2350                         s->deserialized_state = state;
2351         } else if (streq(key, "failure")) {
2352                 int b;
2353
2354                 if ((b = parse_boolean(value)) < 0)
2355                         log_debug("Failed to parse failure value %s", value);
2356                 else
2357                         s->failure = b || s->failure;
2358         } else if (streq(key, "control-pid")) {
2359                 pid_t pid;
2360
2361                 if (parse_pid(value, &pid) < 0)
2362                         log_debug("Failed to parse control-pid value %s", value);
2363                 else
2364                         s->control_pid = pid;
2365         } else if (streq(key, "main-pid")) {
2366                 pid_t pid;
2367
2368                 if (parse_pid(value, &pid) < 0)
2369                         log_debug("Failed to parse main-pid value %s", value);
2370                 else
2371                         service_set_main_pid(s, (pid_t) pid);
2372         } else if (streq(key, "main-pid-known")) {
2373                 int b;
2374
2375                 if ((b = parse_boolean(value)) < 0)
2376                         log_debug("Failed to parse main-pid-known value %s", value);
2377                 else
2378                         s->main_pid_known = b;
2379         } else if (streq(key, "status-text")) {
2380                 char *t;
2381
2382                 if ((t = strdup(value))) {
2383                         free(s->status_text);
2384                         s->status_text = t;
2385                 }
2386
2387         } else if (streq(key, "control-command")) {
2388                 ServiceExecCommand id;
2389
2390                 if ((id = service_exec_command_from_string(value)) < 0)
2391                         log_debug("Failed to parse exec-command value %s", value);
2392                 else {
2393                         s->control_command_id = id;
2394                         s->control_command = s->exec_command[id];
2395                 }
2396         } else if (streq(key, "socket-fd")) {
2397                 int fd;
2398
2399                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2400                         log_debug("Failed to parse socket-fd value %s", value);
2401                 else {
2402
2403                         if (s->socket_fd >= 0)
2404                                 close_nointr_nofail(s->socket_fd);
2405                         s->socket_fd = fdset_remove(fds, fd);
2406                 }
2407         } else if (streq(key, "main-exec-status-pid")) {
2408                 pid_t pid;
2409
2410                 if (parse_pid(value, &pid) < 0)
2411                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2412                 else
2413                         s->main_exec_status.pid = pid;
2414         } else if (streq(key, "main-exec-status-code")) {
2415                 int i;
2416
2417                 if (safe_atoi(value, &i) < 0)
2418                         log_debug("Failed to parse main-exec-status-code value %s", value);
2419                 else
2420                         s->main_exec_status.code = i;
2421         } else if (streq(key, "main-exec-status-status")) {
2422                 int i;
2423
2424                 if (safe_atoi(value, &i) < 0)
2425                         log_debug("Failed to parse main-exec-status-status value %s", value);
2426                 else
2427                         s->main_exec_status.status = i;
2428         } else if (streq(key, "main-exec-status-start"))
2429                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2430         else if (streq(key, "main-exec-status-exit"))
2431                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2432         else
2433                 log_debug("Unknown serialization key '%s'", key);
2434
2435         return 0;
2436 }
2437
2438 static UnitActiveState service_active_state(Unit *u) {
2439         assert(u);
2440
2441         return state_translation_table[SERVICE(u)->state];
2442 }
2443
2444 static const char *service_sub_state_to_string(Unit *u) {
2445         assert(u);
2446
2447         return service_state_to_string(SERVICE(u)->state);
2448 }
2449
2450 #ifdef HAVE_SYSV_COMPAT
2451 static bool service_check_gc(Unit *u) {
2452         Service *s = SERVICE(u);
2453
2454         assert(s);
2455
2456         return !!s->sysv_path;
2457 }
2458 #endif
2459
2460 static bool service_check_snapshot(Unit *u) {
2461         Service *s = SERVICE(u);
2462
2463         assert(s);
2464
2465         return !s->got_socket_fd;
2466 }
2467
2468 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2469         Service *s = SERVICE(u);
2470         bool success;
2471
2472         assert(s);
2473         assert(pid >= 0);
2474
2475         if (!s->meta.fragment_path)
2476                 success = is_clean_exit_lsb(code, status);
2477         else
2478                 success = is_clean_exit(code, status);
2479
2480         if (s->main_pid == pid) {
2481
2482                 s->main_pid = 0;
2483                 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2484
2485                 if (s->type != SERVICE_FORKING && s->control_command) {
2486                         s->control_command->exec_status = s->main_exec_status;
2487
2488                         if (s->control_command->ignore)
2489                                 success = true;
2490                 }
2491
2492                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2493                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2494                 s->failure = s->failure || !success;
2495
2496                 if (s->control_command &&
2497                     s->control_command->command_next &&
2498                     success) {
2499
2500                         /* There is another command to *
2501                          * execute, so let's do that. */
2502
2503                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2504                         service_run_next_main(s, success);
2505
2506                 } else {
2507
2508                         /* The service exited, so the service is officially
2509                          * gone. */
2510
2511                         s->control_command = NULL;
2512                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2513
2514                         switch (s->state) {
2515
2516                         case SERVICE_START_POST:
2517                         case SERVICE_RELOAD:
2518                         case SERVICE_STOP:
2519                                 /* Need to wait until the operation is
2520                                  * done */
2521                                 break;
2522
2523                         case SERVICE_START:
2524                                 if (s->type == SERVICE_ONESHOT) {
2525                                         /* This was our main goal, so let's go on */
2526                                         if (success)
2527                                                 service_enter_start_post(s);
2528                                         else
2529                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2530                                         break;
2531                                 } else {
2532                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2533
2534                                         /* Fall through */
2535                                 }
2536
2537                         case SERVICE_RUNNING:
2538                                 service_enter_running(s, success);
2539                                 break;
2540
2541                         case SERVICE_STOP_SIGTERM:
2542                         case SERVICE_STOP_SIGKILL:
2543
2544                                 if (!control_pid_good(s))
2545                                         service_enter_stop_post(s, success);
2546
2547                                 /* If there is still a control process, wait for that first */
2548                                 break;
2549
2550                         default:
2551                                 assert_not_reached("Uh, main process died at wrong time.");
2552                         }
2553                 }
2554
2555         } else if (s->control_pid == pid) {
2556
2557                 s->control_pid = 0;
2558
2559                 if (s->control_command) {
2560                         exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2561
2562                         if (s->control_command->ignore)
2563                                 success = true;
2564                 }
2565
2566                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2567                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2568                 s->failure = s->failure || !success;
2569
2570                 if (s->control_command &&
2571                     s->control_command->command_next &&
2572                     success) {
2573
2574                         /* There is another command to *
2575                          * execute, so let's do that. */
2576
2577                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2578                         service_run_next_control(s, success);
2579
2580                 } else {
2581                         /* No further commands for this step, so let's
2582                          * figure out what to do next */
2583
2584                         s->control_command = NULL;
2585                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2586
2587                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2588
2589                         switch (s->state) {
2590
2591                         case SERVICE_START_PRE:
2592                                 if (success)
2593                                         service_enter_start(s);
2594                                 else
2595                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2596                                 break;
2597
2598                         case SERVICE_START:
2599                                 assert(s->type == SERVICE_FORKING);
2600
2601                                 /* Let's try to load the pid
2602                                  * file here if we can. We
2603                                  * ignore the return value,
2604                                  * since the PID file might
2605                                  * actually be created by a
2606                                  * START_POST script */
2607
2608                                 if (success) {
2609                                         service_load_pid_file(s);
2610                                         service_search_main_pid(s);
2611
2612                                         service_enter_start_post(s);
2613                                 } else
2614                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2615
2616                                 break;
2617
2618                         case SERVICE_START_POST:
2619                                 if (success && s->pid_file && !s->main_pid_known) {
2620                                         int r;
2621
2622                                         /* Hmm, let's see if we can
2623                                          * load the pid now after the
2624                                          * start-post scripts got
2625                                          * executed. */
2626
2627                                         if ((r = service_load_pid_file(s)) < 0)
2628                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2629                                 }
2630
2631                                 /* Fall through */
2632
2633                         case SERVICE_RELOAD:
2634                                 if (success)
2635                                         service_enter_running(s, true);
2636                                 else
2637                                         service_enter_stop(s, false);
2638
2639                                 break;
2640
2641                         case SERVICE_STOP:
2642                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2643                                 break;
2644
2645                         case SERVICE_STOP_SIGTERM:
2646                         case SERVICE_STOP_SIGKILL:
2647                                 if (main_pid_good(s) <= 0)
2648                                         service_enter_stop_post(s, success);
2649
2650                                 /* If there is still a service
2651                                  * process around, wait until
2652                                  * that one quit, too */
2653                                 break;
2654
2655                         case SERVICE_STOP_POST:
2656                         case SERVICE_FINAL_SIGTERM:
2657                         case SERVICE_FINAL_SIGKILL:
2658                                 service_enter_dead(s, success, true);
2659                                 break;
2660
2661                         default:
2662                                 assert_not_reached("Uh, control process died at wrong time.");
2663                         }
2664                 }
2665         }
2666
2667         /* Notify clients about changed exit status */
2668         unit_add_to_dbus_queue(u);
2669 }
2670
2671 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2672         Service *s = SERVICE(u);
2673
2674         assert(s);
2675         assert(elapsed == 1);
2676
2677         assert(w == &s->timer_watch);
2678
2679         switch (s->state) {
2680
2681         case SERVICE_START_PRE:
2682         case SERVICE_START:
2683                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2684                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2685                 break;
2686
2687         case SERVICE_START_POST:
2688         case SERVICE_RELOAD:
2689                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2690                 service_enter_stop(s, false);
2691                 break;
2692
2693         case SERVICE_STOP:
2694                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2695                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2696                 break;
2697
2698         case SERVICE_STOP_SIGTERM:
2699                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2700                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2701                 break;
2702
2703         case SERVICE_STOP_SIGKILL:
2704                 /* Uh, wie sent a SIGKILL and it is still not gone?
2705                  * Must be something we cannot kill, so let's just be
2706                  * weirded out and continue */
2707
2708                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2709                 service_enter_stop_post(s, false);
2710                 break;
2711
2712         case SERVICE_STOP_POST:
2713                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2714                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2715                 break;
2716
2717         case SERVICE_FINAL_SIGTERM:
2718                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2719                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2720                 break;
2721
2722         case SERVICE_FINAL_SIGKILL:
2723                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2724                 service_enter_dead(s, false, true);
2725                 break;
2726
2727         case SERVICE_AUTO_RESTART:
2728                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2729                 service_enter_restart(s);
2730                 break;
2731
2732         default:
2733                 assert_not_reached("Timeout at wrong time.");
2734         }
2735 }
2736
2737 static void service_cgroup_notify_event(Unit *u) {
2738         Service *s = SERVICE(u);
2739
2740         assert(u);
2741
2742         log_debug("%s: cgroup is empty", u->meta.id);
2743
2744         switch (s->state) {
2745
2746                 /* Waiting for SIGCHLD is usually more interesting,
2747                  * because it includes return codes/signals. Which is
2748                  * why we ignore the cgroup events for most cases,
2749                  * except when we don't know pid which to expect the
2750                  * SIGCHLD for. */
2751
2752         case SERVICE_RUNNING:
2753                 service_enter_running(s, true);
2754                 break;
2755
2756         case SERVICE_STOP_SIGTERM:
2757         case SERVICE_STOP_SIGKILL:
2758                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2759                         service_enter_stop_post(s, true);
2760
2761                 break;
2762
2763         case SERVICE_FINAL_SIGTERM:
2764         case SERVICE_FINAL_SIGKILL:
2765                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2766                         service_enter_dead(s, true, true);
2767
2768                 break;
2769
2770         default:
2771                 ;
2772         }
2773 }
2774
2775 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2776         Service *s = SERVICE(u);
2777         const char *e;
2778
2779         assert(u);
2780
2781         if (s->notify_access == NOTIFY_NONE) {
2782                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2783                             u->meta.id, (unsigned long) pid);
2784                 return;
2785         }
2786
2787         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2788                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2789                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2790                 return;
2791         }
2792
2793         log_debug("%s: Got message", u->meta.id);
2794
2795         /* Interpret MAINPID= */
2796         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2797             (s->state == SERVICE_START ||
2798              s->state == SERVICE_START_POST ||
2799              s->state == SERVICE_RUNNING ||
2800              s->state == SERVICE_RELOAD)) {
2801
2802                 if (parse_pid(e + 8, &pid) < 0)
2803                         log_warning("Failed to parse notification message %s", e);
2804                 else {
2805                         log_debug("%s: got %s", u->meta.id, e);
2806                         service_set_main_pid(s, pid);
2807                 }
2808         }
2809
2810         /* Interpret READY= */
2811         if (s->type == SERVICE_NOTIFY &&
2812             s->state == SERVICE_START &&
2813             strv_find(tags, "READY=1")) {
2814                 log_debug("%s: got READY=1", u->meta.id);
2815
2816                 service_enter_start_post(s);
2817         }
2818
2819         /* Interpret STATUS= */
2820         if ((e = strv_find_prefix(tags, "STATUS="))) {
2821                 char *t;
2822
2823                 if (e[7]) {
2824                         if (!(t = strdup(e+7))) {
2825                                 log_error("Failed to allocate string.");
2826                                 return;
2827                         }
2828
2829                         log_debug("%s: got %s", u->meta.id, e);
2830
2831                         free(s->status_text);
2832                         s->status_text = t;
2833                 } else {
2834                         free(s->status_text);
2835                         s->status_text = NULL;
2836                 }
2837
2838         }
2839
2840         /* Notify clients about changed status or main pid */
2841         unit_add_to_dbus_queue(u);
2842 }
2843
2844 #ifdef HAVE_SYSV_COMPAT
2845 static int service_enumerate(Manager *m) {
2846         char **p;
2847         unsigned i;
2848         DIR *d = NULL;
2849         char *path = NULL, *fpath = NULL, *name = NULL;
2850         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2851         Unit *service;
2852         Iterator j;
2853         int r;
2854 #ifdef TARGET_ARCH
2855         Unit *previous = NULL;
2856         char *arch_daemons = NULL;
2857         char *arch_daemons_stripped = NULL;
2858         char **arch_daemons_split = NULL;
2859 #endif
2860
2861         assert(m);
2862
2863 #ifdef TARGET_ARCH
2864         if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
2865                                 "DAEMONS", &arch_daemons,
2866                                 NULL)) < 0) {
2867
2868                 if (r != -ENOENT)
2869                         log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
2870
2871         } else if (arch_daemons) {
2872                 if (!(arch_daemons_stripped = strchr(arch_daemons, '(')))
2873                         arch_daemons_stripped = arch_daemons;
2874                 else
2875                         arch_daemons_stripped++; /* strip start paren */
2876
2877                 arch_daemons_stripped[strcspn(arch_daemons_stripped, ")")] = 0; /* strip end paren */
2878
2879                 if (!(arch_daemons_split = strv_split_quoted(arch_daemons_stripped))) {
2880                         r = -ENOMEM;
2881                         goto finish;
2882                 }
2883
2884                 STRV_FOREACH(p, arch_daemons_split) {
2885
2886                         free(name);
2887                         name = NULL;
2888
2889                         if (**p == '!') /* daemons prefixed with ! are disabled, so ignore them */
2890                                 continue;
2891
2892                         if (!(name = sysv_translate_name(*p))) {
2893                                 r = -ENOMEM;
2894                                 goto finish;
2895                         }
2896
2897                         if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2898                                 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2899                                 continue;
2900                         }
2901
2902                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, "multi-user.target", NULL, true)) < 0)
2903                                 goto finish;
2904
2905                         if (previous)
2906                                 if ((r = unit_add_dependency(service, UNIT_AFTER, previous, true)) < 0)
2907                                         goto finish;
2908
2909                         if (**p != '@') /* daemons prefixed with @ can be started in the background */
2910                                 previous = service;
2911                 }
2912         }
2913 #endif
2914
2915         zero(runlevel_services);
2916
2917         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2918                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2919                         struct dirent *de;
2920
2921                         free(path);
2922                         path = NULL;
2923                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2924                                 r = -ENOMEM;
2925                                 goto finish;
2926                         }
2927
2928                         if (d)
2929                                 closedir(d);
2930
2931                         if (!(d = opendir(path))) {
2932                                 if (errno != ENOENT)
2933                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2934
2935                                 continue;
2936                         }
2937
2938                         while ((de = readdir(d))) {
2939                                 int a, b;
2940
2941                                 if (ignore_file(de->d_name))
2942                                         continue;
2943
2944                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2945                                         continue;
2946
2947                                 if (strlen(de->d_name) < 4)
2948                                         continue;
2949
2950                                 a = undecchar(de->d_name[1]);
2951                                 b = undecchar(de->d_name[2]);
2952
2953                                 if (a < 0 || b < 0)
2954                                         continue;
2955
2956                                 free(fpath);
2957                                 fpath = NULL;
2958                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2959                                         r = -ENOMEM;
2960                                         goto finish;
2961                                 }
2962
2963                                 if (access(fpath, X_OK) < 0) {
2964
2965                                         if (errno != ENOENT)
2966                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2967
2968                                         continue;
2969                                 }
2970
2971                                 free(name);
2972                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2973                                         r = -ENOMEM;
2974                                         goto finish;
2975                                 }
2976
2977                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2978                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2979                                         continue;
2980                                 }
2981
2982                                 if (de->d_name[0] == 'S')  {
2983
2984                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
2985                                                 SERVICE(service)->sysv_start_priority =
2986                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2987
2988                                                 SERVICE(service)->sysv_enabled = true;
2989                                         }
2990
2991                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
2992                                                 goto finish;
2993
2994                                         if ((r = set_put(runlevel_services[i], service)) < 0)
2995                                                 goto finish;
2996
2997                                 } else if (de->d_name[0] == 'K' &&
2998                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2999                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3000
3001                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3002                                                 goto finish;
3003
3004                                         if ((r = set_put(shutdown_services, service)) < 0)
3005                                                 goto finish;
3006                                 }
3007                         }
3008                 }
3009
3010         /* Now we loaded all stubs and are aware of the lowest
3011         start-up priority for all services, not let's actually load
3012         the services, this will also tell us which services are
3013         actually native now */
3014         manager_dispatch_load_queue(m);
3015
3016         /* If this is a native service, rely on native ways to pull in
3017          * a service, don't pull it in via sysv rcN.d links. */
3018         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3019                 SET_FOREACH(service, runlevel_services[i], j) {
3020                         service = unit_follow_merge(service);
3021
3022                         if (service->meta.fragment_path)
3023                                 continue;
3024
3025                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3026                                 goto finish;
3027                 }
3028
3029         /* We honour K links only for halt/reboot. For the normal
3030          * runlevels we assume the stop jobs will be implicitly added
3031          * by the core logic. Also, we don't really distuingish here
3032          * between the runlevels 0 and 6 and just add them to the
3033          * special shutdown target. On SUSE the boot.d/ runlevel is
3034          * also used for shutdown, so we add links for that too to the
3035          * shutdown target.*/
3036         SET_FOREACH(service, shutdown_services, j) {
3037                 service = unit_follow_merge(service);
3038
3039                 if (service->meta.fragment_path)
3040                         continue;
3041
3042                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3043                         goto finish;
3044         }
3045
3046         r = 0;
3047
3048 finish:
3049         free(path);
3050         free(fpath);
3051         free(name);
3052 #ifdef TARGET_ARCH
3053         free(arch_daemons);
3054         free(arch_daemons_split);
3055 #endif
3056
3057         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3058                 set_free(runlevel_services[i]);
3059         set_free(shutdown_services);
3060
3061         if (d)
3062                 closedir(d);
3063
3064         return r;
3065 }
3066 #endif
3067
3068 static void service_bus_name_owner_change(
3069                 Unit *u,
3070                 const char *name,
3071                 const char *old_owner,
3072                 const char *new_owner) {
3073
3074         Service *s = SERVICE(u);
3075
3076         assert(s);
3077         assert(name);
3078
3079         assert(streq(s->bus_name, name));
3080         assert(old_owner || new_owner);
3081
3082         if (old_owner && new_owner)
3083                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3084         else if (old_owner)
3085                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3086         else
3087                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3088
3089         s->bus_name_good = !!new_owner;
3090
3091         if (s->type == SERVICE_DBUS) {
3092
3093                 /* service_enter_running() will figure out what to
3094                  * do */
3095                 if (s->state == SERVICE_RUNNING)
3096                         service_enter_running(s, true);
3097                 else if (s->state == SERVICE_START && new_owner)
3098                         service_enter_start_post(s);
3099
3100         } else if (new_owner &&
3101                    s->main_pid <= 0 &&
3102                    (s->state == SERVICE_START ||
3103                     s->state == SERVICE_START_POST ||
3104                     s->state == SERVICE_RUNNING ||
3105                     s->state == SERVICE_RELOAD)) {
3106
3107                 /* Try to acquire PID from bus service */
3108                 log_debug("Trying to acquire PID from D-Bus name...");
3109
3110                 bus_query_pid(u->meta.manager, name);
3111         }
3112 }
3113
3114 static void service_bus_query_pid_done(
3115                 Unit *u,
3116                 const char *name,
3117                 pid_t pid) {
3118
3119         Service *s = SERVICE(u);
3120
3121         assert(s);
3122         assert(name);
3123
3124         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3125
3126         if (s->main_pid <= 0 &&
3127             (s->state == SERVICE_START ||
3128              s->state == SERVICE_START_POST ||
3129              s->state == SERVICE_RUNNING ||
3130              s->state == SERVICE_RELOAD))
3131                 service_set_main_pid(s, pid);
3132 }
3133
3134 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3135         assert(s);
3136         assert(fd >= 0);
3137
3138         /* This is called by the socket code when instantiating a new
3139          * service for a stream socket and the socket needs to be
3140          * configured. */
3141
3142         if (s->meta.load_state != UNIT_LOADED)
3143                 return -EINVAL;
3144
3145         if (s->socket_fd >= 0)
3146                 return -EBUSY;
3147
3148         if (s->state != SERVICE_DEAD)
3149                 return -EAGAIN;
3150
3151         s->socket_fd = fd;
3152         s->got_socket_fd = true;
3153         s->accept_socket = sock;
3154
3155         return 0;
3156 }
3157
3158 static void service_reset_failed(Unit *u) {
3159         Service *s = SERVICE(u);
3160
3161         assert(s);
3162
3163         if (s->state == SERVICE_FAILED)
3164                 service_set_state(s, SERVICE_DEAD);
3165
3166         s->failure = false;
3167 }
3168
3169 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3170         Service *s = SERVICE(u);
3171         int r = 0;
3172         Set *pid_set = NULL;
3173
3174         assert(s);
3175
3176         if (s->main_pid <= 0 && who == KILL_MAIN) {
3177                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3178                 return -EINVAL;
3179         }
3180
3181         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3182                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3183                 return -ENOENT;
3184         }
3185
3186         if (s->control_pid > 0)
3187                 if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0)
3188                         r = -errno;
3189
3190         if (s->main_pid > 0)
3191                 if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0)
3192                         r = -errno;
3193
3194         if (mode == KILL_CONTROL_GROUP) {
3195                 int q;
3196
3197                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3198                         return -ENOMEM;
3199
3200                 /* Exclude the control/main pid from being killed via the cgroup */
3201                 if (s->control_pid > 0)
3202                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3203                                 r = q;
3204                                 goto finish;
3205                         }
3206
3207                 if (s->main_pid > 0)
3208                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3209                                 r = q;
3210                                 goto finish;
3211                         }
3212
3213                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, pid_set)) < 0)
3214                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3215                                 r = q;
3216         }
3217
3218 finish:
3219         if (pid_set)
3220                 set_free(pid_set);
3221
3222         return r;
3223 }
3224
3225 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3226         [SERVICE_DEAD] = "dead",
3227         [SERVICE_START_PRE] = "start-pre",
3228         [SERVICE_START] = "start",
3229         [SERVICE_START_POST] = "start-post",
3230         [SERVICE_RUNNING] = "running",
3231         [SERVICE_EXITED] = "exited",
3232         [SERVICE_RELOAD] = "reload",
3233         [SERVICE_STOP] = "stop",
3234         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3235         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3236         [SERVICE_STOP_POST] = "stop-post",
3237         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3238         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3239         [SERVICE_FAILED] = "failed",
3240         [SERVICE_AUTO_RESTART] = "auto-restart",
3241 };
3242
3243 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3244
3245 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3246         [SERVICE_RESTART_NO] = "no",
3247         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3248         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3249         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3250         [SERVICE_RESTART_ALWAYS] = "always"
3251 };
3252
3253 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3254
3255 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3256         [SERVICE_SIMPLE] = "simple",
3257         [SERVICE_FORKING] = "forking",
3258         [SERVICE_ONESHOT] = "oneshot",
3259         [SERVICE_DBUS] = "dbus",
3260         [SERVICE_NOTIFY] = "notify"
3261 };
3262
3263 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3264
3265 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3266         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3267         [SERVICE_EXEC_START] = "ExecStart",
3268         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3269         [SERVICE_EXEC_RELOAD] = "ExecReload",
3270         [SERVICE_EXEC_STOP] = "ExecStop",
3271         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3272 };
3273
3274 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3275
3276 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3277         [NOTIFY_NONE] = "none",
3278         [NOTIFY_MAIN] = "main",
3279         [NOTIFY_ALL] = "all"
3280 };
3281
3282 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3283
3284 const UnitVTable service_vtable = {
3285         .suffix = ".service",
3286         .show_status = true,
3287
3288         .init = service_init,
3289         .done = service_done,
3290         .load = service_load,
3291
3292         .coldplug = service_coldplug,
3293
3294         .dump = service_dump,
3295
3296         .start = service_start,
3297         .stop = service_stop,
3298         .reload = service_reload,
3299
3300         .can_reload = service_can_reload,
3301
3302         .kill = service_kill,
3303
3304         .serialize = service_serialize,
3305         .deserialize_item = service_deserialize_item,
3306
3307         .active_state = service_active_state,
3308         .sub_state_to_string = service_sub_state_to_string,
3309
3310 #ifdef HAVE_SYSV_COMPAT
3311         .check_gc = service_check_gc,
3312 #endif
3313         .check_snapshot = service_check_snapshot,
3314
3315         .sigchld_event = service_sigchld_event,
3316         .timer_event = service_timer_event,
3317
3318         .reset_failed = service_reset_failed,
3319
3320         .cgroup_notify_empty = service_cgroup_notify_event,
3321         .notify_message = service_notify_message,
3322
3323         .bus_name_owner_change = service_bus_name_owner_change,
3324         .bus_query_pid_done = service_bus_query_pid_done,
3325
3326         .bus_interface = "org.freedesktop.systemd1.Service",
3327         .bus_message_handler = bus_service_message_handler,
3328         .bus_invalidating_properties =  bus_service_invalidating_properties,
3329
3330 #ifdef HAVE_SYSV_COMPAT
3331         .enumerate = service_enumerate
3332 #endif
3333 };