src/service.c

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