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
  39 #define COMMENTS "#;\n"
  40 #define NEWLINES "\n\r"
  41
  42 #ifdef HAVE_SYSV_COMPAT
  43
  44 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
  45
  46 typedef enum RunlevelType {
  47         RUNLEVEL_UP,
  48         RUNLEVEL_DOWN,
  49         RUNLEVEL_SYSINIT
  50 } RunlevelType;
  51
  52 static const struct {
  53         const char *path;
  54         const char *target;
  55         const RunlevelType type;
  56 } rcnd_table[] = {
  57         /* Standard SysV runlevels for start-up */
  58         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  59         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  60         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  61         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  62         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  63
  64 #ifdef TARGET_SUSE
  65         /* SUSE style boot.d */
  66         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  67 #endif
  68
  69 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_FRUGALWARE)
  70         /* Debian style rcS.d */
  71         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  72 #endif
  73
  74         /* Standard SysV runlevels for shutdown */
  75         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  76         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  77
  78         /* Note that the order here matters, as we read the
  79            directories in this order, and we want to make sure that
  80            sysv_start_priority is known when we first load the
  81            unit. And that value we only know from S links. Hence
  82            UP/SYSINIT must be read before DOWN */
  83 };
  84
  85 #define RUNLEVELS_UP "12345"
  86 /* #define RUNLEVELS_DOWN "06" */
  87 /* #define RUNLEVELS_BOOT "bBsS" */
  88 #endif
  89
  90 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  91         [SERVICE_DEAD] = UNIT_INACTIVE,
  92         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  93         [SERVICE_START] = UNIT_ACTIVATING,
  94         [SERVICE_START_POST] = UNIT_ACTIVATING,
  95         [SERVICE_RUNNING] = UNIT_ACTIVE,
  96         [SERVICE_EXITED] = UNIT_ACTIVE,
  97         [SERVICE_RELOAD] = UNIT_RELOADING,
  98         [SERVICE_STOP] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 101         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 103         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 104         [SERVICE_FAILED] = UNIT_FAILED,
 105         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 106 };
 107
 108 static void service_init(Unit *u) {
 109         Service *s = SERVICE(u);
 110
 111         assert(u);
 112         assert(u->meta.load_state == UNIT_STUB);
 113
 114         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 115         s->restart_usec = DEFAULT_RESTART_USEC;
 116         s->timer_watch.type = WATCH_INVALID;
 117 #ifdef HAVE_SYSV_COMPAT
 118         s->sysv_start_priority = -1;
 119 #endif
 120         s->socket_fd = -1;
 121
 122         exec_context_init(&s->exec_context);
 123
 124         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 125
 126         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 127 }
 128
 129 static void service_unwatch_control_pid(Service *s) {
 130         assert(s);
 131
 132         if (s->control_pid <= 0)
 133                 return;
 134
 135         unit_unwatch_pid(UNIT(s), s->control_pid);
 136         s->control_pid = 0;
 137 }
 138
 139 static void service_unwatch_main_pid(Service *s) {
 140         assert(s);
 141
 142         if (s->main_pid <= 0)
 143                 return;
 144
 145         unit_unwatch_pid(UNIT(s), s->main_pid);
 146         s->main_pid = 0;
 147 }
 148
 149 static int service_set_main_pid(Service *s, pid_t pid) {
 150         pid_t ppid;
 151
 152         assert(s);
 153
 154         if (pid <= 1)
 155                 return -EINVAL;
 156
 157         if (pid == getpid())
 158                 return -EINVAL;
 159
 160         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 161                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 162                             s->meta.id, (unsigned long) pid);
 163
 164         s->main_pid = pid;
 165         s->main_pid_known = true;
 166
 167         exec_status_start(&s->main_exec_status, pid);
 168
 169         return 0;
 170 }
 171
 172 static void service_close_socket_fd(Service *s) {
 173         assert(s);
 174
 175         if (s->socket_fd < 0)
 176                 return;
 177
 178         close_nointr_nofail(s->socket_fd);
 179         s->socket_fd = -1;
 180 }
 181
 182 static void service_connection_unref(Service *s) {
 183         assert(s);
 184
 185         if (!s->accept_socket)
 186                 return;
 187
 188         socket_connection_unref(s->accept_socket);
 189         s->accept_socket = NULL;
 190 }
 191
 192 static void service_done(Unit *u) {
 193         Service *s = SERVICE(u);
 194
 195         assert(s);
 196
 197         free(s->pid_file);
 198         s->pid_file = NULL;
 199
 200 #ifdef HAVE_SYSV_COMPAT
 201         free(s->sysv_path);
 202         s->sysv_path = NULL;
 203
 204         free(s->sysv_runlevels);
 205         s->sysv_runlevels = NULL;
 206 #endif
 207
 208         free(s->status_text);
 209         s->status_text = NULL;
 210
 211         exec_context_done(&s->exec_context);
 212         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 213         s->control_command = NULL;
 214         s->main_command = NULL;
 215
 216         /* This will leak a process, but at least no memory or any of
 217          * our resources */
 218         service_unwatch_main_pid(s);
 219         service_unwatch_control_pid(s);
 220
 221         if (s->bus_name)  {
 222                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 223                 free(s->bus_name);
 224                 s->bus_name = NULL;
 225         }
 226
 227         service_close_socket_fd(s);
 228         service_connection_unref(s);
 229
 230         set_free(s->configured_sockets);
 231
 232         unit_unwatch_timer(u, &s->timer_watch);
 233 }
 234
 235 #ifdef HAVE_SYSV_COMPAT
 236 static char *sysv_translate_name(const char *name) {
 237         char *r;
 238
 239         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 240                 return NULL;
 241
 242 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 243         if (endswith(name, ".sh"))
 244                 /* Drop Debian-style .sh suffix */
 245                 strcpy(stpcpy(r, name) - 3, ".service");
 246 #endif
 247 #ifdef TARGET_SUSE
 248         if (startswith(name, "boot."))
 249                 /* Drop SuSE-style boot. prefix */
 250                 strcpy(stpcpy(r, name + 5), ".service");
 251 #endif
 252 #ifdef TARGET_FRUGALWARE
 253         if (startswith(name, "rc."))
 254                 /* Drop Frugalware-style rc. prefix */
 255                 strcpy(stpcpy(r, name + 3), ".service");
 256 #endif
 257         else
 258                 /* Normal init scripts */
 259                 strcpy(stpcpy(r, name), ".service");
 260
 261         return r;
 262 }
 263
 264 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 265
 266         /* We silently ignore the $ prefix here. According to the LSB
 267          * spec it simply indicates whether something is a
 268          * standardized name or a distribution-specific one. Since we
 269          * just follow what already exists and do not introduce new
 270          * uses or names we don't care who introduced a new name. */
 271
 272         static const char * const table[] = {
 273                 /* LSB defined facilities */
 274                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 275                 "network",              SPECIAL_NETWORK_TARGET,
 276                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 277                 "portmap",              SPECIAL_RPCBIND_TARGET,
 278                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 279                 "syslog",               SPECIAL_SYSLOG_TARGET,
 280                 "time",                 SPECIAL_RTC_SET_TARGET,
 281
 282                 /* common extensions */
 283                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 284                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 285                 "null",                 NULL,
 286
 287 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 288                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 289 #endif
 290
 291 #ifdef TARGET_FEDORA
 292                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 293                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 294                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 295 #endif
 296
 297 #ifdef TARGET_SUSE
 298                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 299 #endif
 300         };
 301
 302         unsigned i;
 303         char *r;
 304         const char *n;
 305
 306         assert(name);
 307         assert(_r);
 308
 309         n = *name == '$' ? name + 1 : name;
 310
 311         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 312
 313                 if (!streq(table[i], n))
 314                         continue;
 315
 316                 if (!table[i+1])
 317                         return 0;
 318
 319                 if (!(r = strdup(table[i+1])))
 320                         return -ENOMEM;
 321
 322                 goto finish;
 323         }
 324
 325         /* If we don't know this name, fallback heuristics to figure
 326          * out whether something is a target or a service alias. */
 327
 328         if (*name == '$') {
 329                 if (!unit_prefix_is_valid(n))
 330                         return -EINVAL;
 331
 332                 /* Facilities starting with $ are most likely targets */
 333                 r = unit_name_build(n, NULL, ".target");
 334         } else if (filename && streq(name, filename))
 335                 /* Names equalling the file name of the services are redundant */
 336                 return 0;
 337         else
 338                 /* Everything else we assume to be normal service names */
 339                 r = sysv_translate_name(n);
 340
 341         if (!r)
 342                 return -ENOMEM;
 343
 344 finish:
 345
 346         if (_r)
 347                 *_r = r;
 348
 349         return 1;
 350 }
 351
 352 static int sysv_fix_order(Service *s) {
 353         Meta *other;
 354         int r;
 355
 356         assert(s);
 357
 358         if (s->sysv_start_priority < 0)
 359                 return 0;
 360
 361         /* For each pair of services where at least one lacks a LSB
 362          * header, we use the start priority value to order things. */
 363
 364         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 365                 Service *t;
 366                 UnitDependency d;
 367                 bool special_s, special_t;
 368
 369                 t = (Service*) other;
 370
 371                 if (s == t)
 372                         continue;
 373
 374                 if (t->meta.load_state != UNIT_LOADED)
 375                         continue;
 376
 377                 if (t->sysv_start_priority < 0)
 378                         continue;
 379
 380                 /* If both units have modern headers we don't care
 381                  * about the priorities */
 382                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 383                     (t->meta.fragment_path || t->sysv_has_lsb))
 384                         continue;
 385
 386                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 387                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 388
 389                 if (special_t && !special_s)
 390                         d = UNIT_AFTER;
 391                 else if (special_s && !special_t)
 392                         d = UNIT_BEFORE;
 393                 else if (t->sysv_start_priority < s->sysv_start_priority)
 394                         d = UNIT_AFTER;
 395                 else if (t->sysv_start_priority > s->sysv_start_priority)
 396                         d = UNIT_BEFORE;
 397                 else
 398                         continue;
 399
 400                 /* FIXME: Maybe we should compare the name here lexicographically? */
 401
 402                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 403                         return r;
 404         }
 405
 406         return 0;
 407 }
 408
 409 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 410         ExecCommand *c;
 411
 412         if (!(c = new0(ExecCommand, 1)))
 413                 return NULL;
 414
 415         if (!(c->path = strdup(path))) {
 416                 free(c);
 417                 return NULL;
 418         }
 419
 420         if (!(c->argv = strv_new(path, arg1, NULL))) {
 421                 free(c->path);
 422                 free(c);
 423                 return NULL;
 424         }
 425
 426         return c;
 427 }
 428
 429 static int sysv_exec_commands(Service *s) {
 430         ExecCommand *c;
 431
 432         assert(s);
 433         assert(s->sysv_path);
 434
 435         if (!(c = exec_command_new(s->sysv_path, "start")))
 436                 return -ENOMEM;
 437         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 438
 439         if (!(c = exec_command_new(s->sysv_path, "stop")))
 440                 return -ENOMEM;
 441         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 442
 443         if (!(c = exec_command_new(s->sysv_path, "reload")))
 444                 return -ENOMEM;
 445         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 446
 447         return 0;
 448 }
 449
 450 static int service_load_sysv_path(Service *s, const char *path) {
 451         FILE *f;
 452         Unit *u;
 453         unsigned line = 0;
 454         int r;
 455         enum {
 456                 NORMAL,
 457                 DESCRIPTION,
 458                 LSB,
 459                 LSB_DESCRIPTION
 460         } state = NORMAL;
 461         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 462
 463         assert(s);
 464         assert(path);
 465
 466         u = UNIT(s);
 467
 468         if (!(f = fopen(path, "re"))) {
 469                 r = errno == ENOENT ? 0 : -errno;
 470                 goto finish;
 471         }
 472
 473         free(s->sysv_path);
 474         if (!(s->sysv_path = strdup(path))) {
 475                 r = -ENOMEM;
 476                 goto finish;
 477         }
 478
 479         while (!feof(f)) {
 480                 char l[LINE_MAX], *t;
 481
 482                 if (!fgets(l, sizeof(l), f)) {
 483                         if (feof(f))
 484                                 break;
 485
 486                         r = -errno;
 487                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 488                         goto finish;
 489                 }
 490
 491                 line++;
 492
 493                 t = strstrip(l);
 494                 if (*t != '#')
 495                         continue;
 496
 497                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 498                         state = LSB;
 499                         s->sysv_has_lsb = true;
 500                         continue;
 501                 }
 502
 503                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 504                         state = NORMAL;
 505                         continue;
 506                 }
 507
 508                 t++;
 509                 t += strspn(t, WHITESPACE);
 510
 511                 if (state == NORMAL) {
 512
 513                         /* Try to parse Red Hat style chkconfig headers */
 514
 515                         if (startswith_no_case(t, "chkconfig:")) {
 516                                 int start_priority;
 517                                 char runlevels[16], *k;
 518
 519                                 state = NORMAL;
 520
 521                                 if (sscanf(t+10, "%15s %i %*i",
 522                                            runlevels,
 523                                            &start_priority) != 2) {
 524
 525                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 526                                         continue;
 527                                 }
 528
 529                                 /* A start priority gathered from the
 530                                  * symlink farms is preferred over the
 531                                  * data from the LSB header. */
 532                                 if (start_priority < 0 || start_priority > 99)
 533                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 534                                 else if (s->sysv_start_priority < 0)
 535                                         s->sysv_start_priority = start_priority;
 536
 537                                 char_array_0(runlevels);
 538                                 k = delete_chars(runlevels, WHITESPACE "-");
 539
 540                                 if (k[0]) {
 541                                         char *d;
 542
 543                                         if (!(d = strdup(k))) {
 544                                                 r = -ENOMEM;
 545                                                 goto finish;
 546                                         }
 547
 548                                         free(s->sysv_runlevels);
 549                                         s->sysv_runlevels = d;
 550                                 }
 551
 552                         } else if (startswith_no_case(t, "description:")) {
 553
 554                                 size_t k = strlen(t);
 555                                 char *d;
 556                                 const char *j;
 557
 558                                 if (t[k-1] == '\\') {
 559                                         state = DESCRIPTION;
 560                                         t[k-1] = 0;
 561                                 }
 562
 563                                 if ((j = strstrip(t+12)) && *j) {
 564                                         if (!(d = strdup(j))) {
 565                                                 r = -ENOMEM;
 566                                                 goto finish;
 567                                         }
 568                                 } else
 569                                         d = NULL;
 570
 571                                 free(chkconfig_description);
 572                                 chkconfig_description = d;
 573
 574                         } else if (startswith_no_case(t, "pidfile:")) {
 575
 576                                 char *fn;
 577
 578                                 state = NORMAL;
 579
 580                                 fn = strstrip(t+8);
 581                                 if (!path_is_absolute(fn)) {
 582                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 583                                         continue;
 584                                 }
 585
 586                                 if (!(fn = strdup(fn))) {
 587                                         r = -ENOMEM;
 588                                         goto finish;
 589                                 }
 590
 591                                 free(s->pid_file);
 592                                 s->pid_file = fn;
 593                         }
 594
 595                 } else if (state == DESCRIPTION) {
 596
 597                         /* Try to parse Red Hat style description
 598                          * continuation */
 599
 600                         size_t k = strlen(t);
 601                         char *j;
 602
 603                         if (t[k-1] == '\\')
 604                                 t[k-1] = 0;
 605                         else
 606                                 state = NORMAL;
 607
 608                         if ((j = strstrip(t)) && *j) {
 609                                 char *d = NULL;
 610
 611                                 if (chkconfig_description)
 612                                         asprintf(&d, "%s %s", chkconfig_description, j);
 613                                 else
 614                                         d = strdup(j);
 615
 616                                 if (!d) {
 617                                         r = -ENOMEM;
 618                                         goto finish;
 619                                 }
 620
 621                                 free(chkconfig_description);
 622                                 chkconfig_description = d;
 623                         }
 624
 625                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 626
 627                         if (startswith_no_case(t, "Provides:")) {
 628                                 char *i, *w;
 629                                 size_t z;
 630
 631                                 state = LSB;
 632
 633                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 634                                         char *n, *m;
 635
 636                                         if (!(n = strndup(w, z))) {
 637                                                 r = -ENOMEM;
 638                                                 goto finish;
 639                                         }
 640
 641                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 642                                         free(n);
 643
 644                                         if (r < 0)
 645                                                 goto finish;
 646
 647                                         if (r == 0)
 648                                                 continue;
 649
 650                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 651                                                 r = unit_add_name(u, m);
 652                                         else {
 653                                                 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 654
 655                                                 if (s->sysv_enabled) {
 656                                                         int k;
 657
 658                                                         if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
 659                                                                 r = k;
 660                                                 }
 661                                         }
 662
 663                                         if (r < 0)
 664                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 665
 666                                         free(m);
 667                                 }
 668
 669                         } else if (startswith_no_case(t, "Required-Start:") ||
 670                                    startswith_no_case(t, "Should-Start:") ||
 671                                    startswith_no_case(t, "X-Start-Before:") ||
 672                                    startswith_no_case(t, "X-Start-After:")) {
 673                                 char *i, *w;
 674                                 size_t z;
 675
 676                                 state = LSB;
 677
 678                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 679                                         char *n, *m;
 680
 681                                         if (!(n = strndup(w, z))) {
 682                                                 r = -ENOMEM;
 683                                                 goto finish;
 684                                         }
 685
 686                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 687
 688                                         if (r < 0) {
 689                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
 690                                                 free(n);
 691                                                 continue;
 692                                         }
 693
 694                                         free(n);
 695
 696                                         if (r == 0)
 697                                                 continue;
 698
 699                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 700
 701                                         if (r < 0)
 702                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 703
 704                                         free(m);
 705                                 }
 706                         } else if (startswith_no_case(t, "Default-Start:")) {
 707                                 char *k, *d;
 708
 709                                 state = LSB;
 710
 711                                 k = delete_chars(t+14, WHITESPACE "-");
 712
 713                                 if (k[0] != 0) {
 714                                         if (!(d = strdup(k))) {
 715                                                 r = -ENOMEM;
 716                                                 goto finish;
 717                                         }
 718
 719                                         free(s->sysv_runlevels);
 720                                         s->sysv_runlevels = d;
 721                                 }
 722
 723                         } else if (startswith_no_case(t, "Description:")) {
 724                                 char *d, *j;
 725
 726                                 state = LSB_DESCRIPTION;
 727
 728                                 if ((j = strstrip(t+12)) && *j) {
 729                                         if (!(d = strdup(j))) {
 730                                                 r = -ENOMEM;
 731                                                 goto finish;
 732                                         }
 733                                 } else
 734                                         d = NULL;
 735
 736                                 free(long_description);
 737                                 long_description = d;
 738
 739                         } else if (startswith_no_case(t, "Short-Description:")) {
 740                                 char *d, *j;
 741
 742                                 state = LSB;
 743
 744                                 if ((j = strstrip(t+18)) && *j) {
 745                                         if (!(d = strdup(j))) {
 746                                                 r = -ENOMEM;
 747                                                 goto finish;
 748                                         }
 749                                 } else
 750                                         d = NULL;
 751
 752                                 free(short_description);
 753                                 short_description = d;
 754
 755                         } else if (startswith_no_case(t, "X-Interactive:")) {
 756                                 int b;
 757
 758                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 759                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 760                                         continue;
 761                                 }
 762
 763                                 if (b)
 764                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 765                                 else
 766                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 767
 768                         } else if (state == LSB_DESCRIPTION) {
 769
 770                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 771                                         char *j;
 772
 773                                         if ((j = strstrip(t)) && *j) {
 774                                                 char *d = NULL;
 775
 776                                                 if (long_description)
 777                                                         asprintf(&d, "%s %s", long_description, t);
 778                                                 else
 779                                                         d = strdup(j);
 780
 781                                                 if (!d) {
 782                                                         r = -ENOMEM;
 783                                                         goto finish;
 784                                                 }
 785
 786                                                 free(long_description);
 787                                                 long_description = d;
 788                                         }
 789
 790                                 } else
 791                                         state = LSB;
 792                         }
 793                 }
 794         }
 795
 796         if ((r = sysv_exec_commands(s)) < 0)
 797                 goto finish;
 798
 799         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 800                 /* If there a runlevels configured for this service
 801                  * but none of the standard ones, then we assume this
 802                  * is some special kind of service (which might be
 803                  * needed for early boot) and don't create any links
 804                  * to it. */
 805
 806                 s->meta.default_dependencies = false;
 807
 808                 /* Don't timeout special services during boot (like fsck) */
 809                 s->timeout_usec = 0;
 810         } else
 811                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 812
 813         /* Special setting for all SysV services */
 814         s->type = SERVICE_FORKING;
 815         s->remain_after_exit = true;
 816         s->restart = SERVICE_RESTART_NO;
 817         s->exec_context.std_output =
 818                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 819                 ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL;
 820         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 821
 822         /* We use the long description only if
 823          * no short description is set. */
 824
 825         if (short_description)
 826                 description = short_description;
 827         else if (chkconfig_description)
 828                 description = chkconfig_description;
 829         else if (long_description)
 830                 description = long_description;
 831         else
 832                 description = NULL;
 833
 834         if (description) {
 835                 char *d;
 836
 837                 if (!(d = strappend("LSB: ", description))) {
 838                         r = -ENOMEM;
 839                         goto finish;
 840                 }
 841
 842                 u->meta.description = d;
 843         }
 844
 845         u->meta.load_state = UNIT_LOADED;
 846         r = 0;
 847
 848 finish:
 849
 850         if (f)
 851                 fclose(f);
 852
 853         free(short_description);
 854         free(long_description);
 855         free(chkconfig_description);
 856
 857         return r;
 858 }
 859
 860 static int service_load_sysv_name(Service *s, const char *name) {
 861         char **p;
 862
 863         assert(s);
 864         assert(name);
 865
 866         /* For SysV services we strip the boot.*, rc.* and *.sh
 867          * prefixes/suffixes. */
 868 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 869         if (endswith(name, ".sh.service"))
 870                 return -ENOENT;
 871 #endif
 872
 873 #ifdef TARGET_SUSE
 874         if (startswith(name, "boot."))
 875                 return -ENOENT;
 876 #endif
 877
 878 #ifdef TARGET_FRUGALWARE
 879         if (startswith(name, "rc."))
 880                 return -ENOENT;
 881 #endif
 882
 883         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 884                 char *path;
 885                 int r;
 886
 887                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 888                         return -ENOMEM;
 889
 890                 assert(endswith(path, ".service"));
 891                 path[strlen(path)-8] = 0;
 892
 893                 r = service_load_sysv_path(s, path);
 894
 895 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 896                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 897                         /* Try Debian style *.sh source'able init scripts */
 898                         strcat(path, ".sh");
 899                         r = service_load_sysv_path(s, path);
 900                 }
 901 #endif
 902                 free(path);
 903
 904 #ifdef TARGET_SUSE
 905                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 906                         /* Try SUSE style boot.* init scripts */
 907
 908                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 909                                 return -ENOMEM;
 910
 911                         /* Drop .service suffix */
 912                         path[strlen(path)-8] = 0;
 913                         r = service_load_sysv_path(s, path);
 914                         free(path);
 915                 }
 916 #endif
 917
 918 #ifdef TARGET_FRUGALWARE
 919                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 920                         /* Try Frugalware style rc.* init scripts */
 921
 922                         if (asprintf(&path, "%s/rc.%s", *p, name) < 0)
 923                                 return -ENOMEM;
 924
 925                         /* Drop .service suffix */
 926                         path[strlen(path)-8] = 0;
 927                         r = service_load_sysv_path(s, path);
 928                         free(path);
 929                 }
 930 #endif
 931
 932                 if (r < 0)
 933                         return r;
 934
 935                 if ((s->meta.load_state != UNIT_STUB))
 936                         break;
 937         }
 938
 939         return 0;
 940 }
 941
 942 static int service_load_sysv(Service *s) {
 943         const char *t;
 944         Iterator i;
 945         int r;
 946
 947         assert(s);
 948
 949         /* Load service data from SysV init scripts, preferably with
 950          * LSB headers ... */
 951
 952         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 953                 return 0;
 954
 955         if ((t = s->meta.id))
 956                 if ((r = service_load_sysv_name(s, t)) < 0)
 957                         return r;
 958
 959         if (s->meta.load_state == UNIT_STUB)
 960                 SET_FOREACH(t, s->meta.names, i) {
 961                         if (t == s->meta.id)
 962                                 continue;
 963
 964                         if ((r = service_load_sysv_name(s, t)) < 0)
 965                                 return r;
 966
 967                         if (s->meta.load_state != UNIT_STUB)
 968                                 break;
 969                 }
 970
 971         return 0;
 972 }
 973 #endif
 974
 975 static int fsck_fix_order(Service *s) {
 976         Meta *other;
 977         int r;
 978
 979         assert(s);
 980
 981         if (s->fsck_passno <= 0)
 982                 return 0;
 983
 984         /* For each pair of services where both have an fsck priority
 985          * we order things based on it. */
 986
 987         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 988                 Service *t;
 989                 UnitDependency d;
 990
 991                 t = (Service*) other;
 992
 993                 if (s == t)
 994                         continue;
 995
 996                 if (t->meta.load_state != UNIT_LOADED)
 997                         continue;
 998
 999                 if (t->fsck_passno <= 0)
1000                         continue;
1001
1002                 if (t->fsck_passno < s->fsck_passno)
1003                         d = UNIT_AFTER;
1004                 else if (t->fsck_passno > s->fsck_passno)
1005                         d = UNIT_BEFORE;
1006                 else
1007                         continue;
1008
1009                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1010                         return r;
1011         }
1012
1013         return 0;
1014 }
1015
1016 static int service_verify(Service *s) {
1017         assert(s);
1018
1019         if (s->meta.load_state != UNIT_LOADED)
1020                 return 0;
1021
1022         if (!s->exec_command[SERVICE_EXEC_START]) {
1023                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1024                 return -EINVAL;
1025         }
1026
1027         if (s->type != SERVICE_ONESHOT &&
1028             s->exec_command[SERVICE_EXEC_START]->command_next) {
1029                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1030                 return -EINVAL;
1031         }
1032
1033         if (s->type == SERVICE_ONESHOT &&
1034             s->exec_command[SERVICE_EXEC_RELOAD]) {
1035                 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", s->meta.id);
1036                 return -EINVAL;
1037         }
1038
1039         if (s->type == SERVICE_DBUS && !s->bus_name) {
1040                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1041                 return -EINVAL;
1042         }
1043
1044         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1045                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1046                 return -EINVAL;
1047         }
1048
1049         return 0;
1050 }
1051
1052 static int service_add_default_dependencies(Service *s) {
1053         int r;
1054
1055         assert(s);
1056
1057         /* Add a number of automatic dependencies useful for the
1058          * majority of services. */
1059
1060         /* First, pull in base system */
1061         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1062
1063                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1064                         return r;
1065
1066         } else if (s->meta.manager->running_as == MANAGER_USER) {
1067
1068                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1069                         return r;
1070         }
1071
1072         /* Second, activate normal shutdown */
1073         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1074 }
1075
1076 static int service_load(Unit *u) {
1077         int r;
1078         Service *s = SERVICE(u);
1079
1080         assert(s);
1081
1082         /* Load a .service file */
1083         if ((r = unit_load_fragment(u)) < 0)
1084                 return r;
1085
1086 #ifdef HAVE_SYSV_COMPAT
1087         /* Load a classic init script as a fallback, if we couldn't find anything */
1088         if (u->meta.load_state == UNIT_STUB)
1089                 if ((r = service_load_sysv(s)) < 0)
1090                         return r;
1091 #endif
1092
1093         /* Still nothing found? Then let's give up */
1094         if (u->meta.load_state == UNIT_STUB)
1095                 return -ENOENT;
1096
1097         /* We were able to load something, then let's add in the
1098          * dropin directories. */
1099         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1100                 return r;
1101
1102         /* This is a new unit? Then let's add in some extras */
1103         if (u->meta.load_state == UNIT_LOADED) {
1104                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1105                         return r;
1106
1107                 if ((r = unit_add_default_cgroups(u)) < 0)
1108                         return r;
1109
1110 #ifdef HAVE_SYSV_COMPAT
1111                 if ((r = sysv_fix_order(s)) < 0)
1112                         return r;
1113 #endif
1114
1115                 if ((r = fsck_fix_order(s)) < 0)
1116                         return r;
1117
1118                 if (s->bus_name)
1119                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1120                                 return r;
1121
1122                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1123                         s->notify_access = NOTIFY_MAIN;
1124
1125                 if (s->type == SERVICE_DBUS || s->bus_name)
1126                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1127                                 return r;
1128
1129                 if (s->meta.default_dependencies)
1130                         if ((r = service_add_default_dependencies(s)) < 0)
1131                                 return r;
1132         }
1133
1134         return service_verify(s);
1135 }
1136
1137 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1138
1139         ServiceExecCommand c;
1140         Service *s = SERVICE(u);
1141         const char *prefix2;
1142         char *p2;
1143
1144         assert(s);
1145
1146         p2 = strappend(prefix, "\t");
1147         prefix2 = p2 ? p2 : prefix;
1148
1149         fprintf(f,
1150                 "%sService State: %s\n"
1151                 "%sPermissionsStartOnly: %s\n"
1152                 "%sRootDirectoryStartOnly: %s\n"
1153                 "%sRemainAfterExit: %s\n"
1154                 "%sType: %s\n"
1155                 "%sRestart: %s\n"
1156                 "%sNotifyAccess: %s\n",
1157                 prefix, service_state_to_string(s->state),
1158                 prefix, yes_no(s->permissions_start_only),
1159                 prefix, yes_no(s->root_directory_start_only),
1160                 prefix, yes_no(s->remain_after_exit),
1161                 prefix, service_type_to_string(s->type),
1162                 prefix, service_restart_to_string(s->restart),
1163                 prefix, notify_access_to_string(s->notify_access));
1164
1165         if (s->control_pid > 0)
1166                 fprintf(f,
1167                         "%sControl PID: %lu\n",
1168                         prefix, (unsigned long) s->control_pid);
1169
1170         if (s->main_pid > 0)
1171                 fprintf(f,
1172                         "%sMain PID: %lu\n",
1173                         prefix, (unsigned long) s->main_pid);
1174
1175         if (s->pid_file)
1176                 fprintf(f,
1177                         "%sPIDFile: %s\n",
1178                         prefix, s->pid_file);
1179
1180         if (s->bus_name)
1181                 fprintf(f,
1182                         "%sBusName: %s\n"
1183                         "%sBus Name Good: %s\n",
1184                         prefix, s->bus_name,
1185                         prefix, yes_no(s->bus_name_good));
1186
1187         exec_context_dump(&s->exec_context, f, prefix);
1188
1189         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1190
1191                 if (!s->exec_command[c])
1192                         continue;
1193
1194                 fprintf(f, "%s-> %s:\n",
1195                         prefix, service_exec_command_to_string(c));
1196
1197                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1198         }
1199
1200 #ifdef HAVE_SYSV_COMPAT
1201         if (s->sysv_path)
1202                 fprintf(f,
1203                         "%sSysV Init Script Path: %s\n"
1204                         "%sSysV Init Script has LSB Header: %s\n"
1205                         "%sSysVEnabled: %s\n",
1206                         prefix, s->sysv_path,
1207                         prefix, yes_no(s->sysv_has_lsb),
1208                         prefix, yes_no(s->sysv_enabled));
1209
1210         if (s->sysv_start_priority >= 0)
1211                 fprintf(f,
1212                         "%sSysVStartPriority: %i\n",
1213                         prefix, s->sysv_start_priority);
1214
1215         if (s->sysv_runlevels)
1216                 fprintf(f, "%sSysVRunLevels: %s\n",
1217                         prefix, s->sysv_runlevels);
1218 #endif
1219
1220         if (s->fsck_passno > 0)
1221                 fprintf(f,
1222                         "%sFsckPassNo: %i\n",
1223                         prefix, s->fsck_passno);
1224
1225         if (s->status_text)
1226                 fprintf(f, "%sStatus Text: %s\n",
1227                         prefix, s->status_text);
1228
1229         free(p2);
1230 }
1231
1232 static int service_load_pid_file(Service *s) {
1233         char *k;
1234         int r;
1235         pid_t pid;
1236
1237         assert(s);
1238
1239         if (s->main_pid_known)
1240                 return 0;
1241
1242         assert(s->main_pid <= 0);
1243
1244         if (!s->pid_file)
1245                 return -ENOENT;
1246
1247         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1248                 return r;
1249
1250         r = parse_pid(k, &pid);
1251         free(k);
1252
1253         if (r < 0)
1254                 return r;
1255
1256         if (kill(pid, 0) < 0 && errno != EPERM) {
1257                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1258                             (unsigned long) pid, s->pid_file);
1259                 return -ESRCH;
1260         }
1261
1262         if ((r = service_set_main_pid(s, pid)) < 0)
1263                 return r;
1264
1265         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1266                 /* FIXME: we need to do something here */
1267                 return r;
1268
1269         return 0;
1270 }
1271
1272 static int service_search_main_pid(Service *s) {
1273         pid_t pid;
1274         int r;
1275
1276         assert(s);
1277
1278         if (s->main_pid_known)
1279                 return 0;
1280
1281         assert(s->main_pid <= 0);
1282
1283         if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1284                 return -ENOENT;
1285
1286         if ((r = service_set_main_pid(s, pid)) < 0)
1287                 return r;
1288
1289         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1290                 /* FIXME: we need to do something here */
1291                 return r;
1292
1293         return 0;
1294 }
1295
1296 static int service_get_sockets(Service *s, Set **_set) {
1297         Set *set;
1298         Iterator i;
1299         char *t;
1300         int r;
1301
1302         assert(s);
1303         assert(_set);
1304
1305         if (s->socket_fd >= 0)
1306                 return 0;
1307
1308         if (!set_isempty(s->configured_sockets))
1309                 return 0;
1310
1311         /* Collects all Socket objects that belong to this
1312          * service. Note that a service might have multiple sockets
1313          * via multiple names. */
1314
1315         if (!(set = set_new(NULL, NULL)))
1316                 return -ENOMEM;
1317
1318         SET_FOREACH(t, s->meta.names, i) {
1319                 char *k;
1320                 Unit *p;
1321
1322                 /* Look for all socket objects that go by any of our
1323                  * units and collect their fds */
1324
1325                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1326                         r = -ENOMEM;
1327                         goto fail;
1328                 }
1329
1330                 p = manager_get_unit(s->meta.manager, k);
1331                 free(k);
1332
1333                 if (!p)
1334                         continue;
1335
1336                 if ((r = set_put(set, p)) < 0)
1337                         goto fail;
1338         }
1339
1340         *_set = set;
1341         return 0;
1342
1343 fail:
1344         set_free(set);
1345         return r;
1346 }
1347
1348 static int service_notify_sockets_dead(Service *s) {
1349         Iterator i;
1350         Set *set, *free_set = NULL;
1351         Socket *sock;
1352         int r;
1353
1354         assert(s);
1355
1356         /* Notifies all our sockets when we die */
1357
1358         if (s->socket_fd >= 0)
1359                 return 0;
1360
1361         if (!set_isempty(s->configured_sockets))
1362                 set = s->configured_sockets;
1363         else {
1364                 if ((r = service_get_sockets(s, &free_set)) < 0)
1365                         return r;
1366
1367                 set = free_set;
1368         }
1369
1370         SET_FOREACH(sock, set, i)
1371                 socket_notify_service_dead(sock);
1372
1373         set_free(free_set);
1374
1375         return 0;
1376 }
1377
1378 static void service_set_state(Service *s, ServiceState state) {
1379         ServiceState old_state;
1380         assert(s);
1381
1382         old_state = s->state;
1383         s->state = state;
1384
1385         if (state != SERVICE_START_PRE &&
1386             state != SERVICE_START &&
1387             state != SERVICE_START_POST &&
1388             state != SERVICE_RELOAD &&
1389             state != SERVICE_STOP &&
1390             state != SERVICE_STOP_SIGTERM &&
1391             state != SERVICE_STOP_SIGKILL &&
1392             state != SERVICE_STOP_POST &&
1393             state != SERVICE_FINAL_SIGTERM &&
1394             state != SERVICE_FINAL_SIGKILL &&
1395             state != SERVICE_AUTO_RESTART)
1396                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1397
1398         if (state != SERVICE_START &&
1399             state != SERVICE_START_POST &&
1400             state != SERVICE_RUNNING &&
1401             state != SERVICE_RELOAD &&
1402             state != SERVICE_STOP &&
1403             state != SERVICE_STOP_SIGTERM &&
1404             state != SERVICE_STOP_SIGKILL) {
1405                 service_unwatch_main_pid(s);
1406                 s->main_command = NULL;
1407         }
1408
1409         if (state != SERVICE_START_PRE &&
1410             state != SERVICE_START &&
1411             state != SERVICE_START_POST &&
1412             state != SERVICE_RELOAD &&
1413             state != SERVICE_STOP &&
1414             state != SERVICE_STOP_SIGTERM &&
1415             state != SERVICE_STOP_SIGKILL &&
1416             state != SERVICE_STOP_POST &&
1417             state != SERVICE_FINAL_SIGTERM &&
1418             state != SERVICE_FINAL_SIGKILL) {
1419                 service_unwatch_control_pid(s);
1420                 s->control_command = NULL;
1421                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1422         }
1423
1424         if (state == SERVICE_DEAD ||
1425             state == SERVICE_STOP ||
1426             state == SERVICE_STOP_SIGTERM ||
1427             state == SERVICE_STOP_SIGKILL ||
1428             state == SERVICE_STOP_POST ||
1429             state == SERVICE_FINAL_SIGTERM ||
1430             state == SERVICE_FINAL_SIGKILL ||
1431             state == SERVICE_FAILED ||
1432             state == SERVICE_AUTO_RESTART)
1433                 service_notify_sockets_dead(s);
1434
1435         if (state != SERVICE_START_PRE &&
1436             state != SERVICE_START &&
1437             state != SERVICE_START_POST &&
1438             state != SERVICE_RUNNING &&
1439             state != SERVICE_RELOAD &&
1440             state != SERVICE_STOP &&
1441             state != SERVICE_STOP_SIGTERM &&
1442             state != SERVICE_STOP_SIGKILL &&
1443             state != SERVICE_STOP_POST &&
1444             state != SERVICE_FINAL_SIGTERM &&
1445             state != SERVICE_FINAL_SIGKILL &&
1446             !(state == SERVICE_DEAD && s->meta.job)) {
1447                 service_close_socket_fd(s);
1448                 service_connection_unref(s);
1449         }
1450
1451         /* For the inactive states unit_notify() will trim the cgroup,
1452          * but for exit we have to do that ourselves... */
1453         if (state == SERVICE_EXITED)
1454                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1455
1456         if (old_state != state)
1457                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1458
1459         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1460         s->reload_failure = false;
1461 }
1462
1463 static int service_coldplug(Unit *u) {
1464         Service *s = SERVICE(u);
1465         int r;
1466
1467         assert(s);
1468         assert(s->state == SERVICE_DEAD);
1469
1470         if (s->deserialized_state != s->state) {
1471
1472                 if (s->deserialized_state == SERVICE_START_PRE ||
1473                     s->deserialized_state == SERVICE_START ||
1474                     s->deserialized_state == SERVICE_START_POST ||
1475                     s->deserialized_state == SERVICE_RELOAD ||
1476                     s->deserialized_state == SERVICE_STOP ||
1477                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1478                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1479                     s->deserialized_state == SERVICE_STOP_POST ||
1480                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1481                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1482                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1483
1484                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1485                                 usec_t k;
1486
1487                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1488
1489                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1490                                         return r;
1491                         }
1492                 }
1493
1494                 if ((s->deserialized_state == SERVICE_START &&
1495                      (s->type == SERVICE_FORKING ||
1496                       s->type == SERVICE_DBUS ||
1497                       s->type == SERVICE_ONESHOT ||
1498                       s->type == SERVICE_NOTIFY)) ||
1499                     s->deserialized_state == SERVICE_START_POST ||
1500                     s->deserialized_state == SERVICE_RUNNING ||
1501                     s->deserialized_state == SERVICE_RELOAD ||
1502                     s->deserialized_state == SERVICE_STOP ||
1503                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1504                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1505                         if (s->main_pid > 0)
1506                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1507                                         return r;
1508
1509                 if (s->deserialized_state == SERVICE_START_PRE ||
1510                     s->deserialized_state == SERVICE_START ||
1511                     s->deserialized_state == SERVICE_START_POST ||
1512                     s->deserialized_state == SERVICE_RELOAD ||
1513                     s->deserialized_state == SERVICE_STOP ||
1514                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1515                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1516                     s->deserialized_state == SERVICE_STOP_POST ||
1517                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1518                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1519                         if (s->control_pid > 0)
1520                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1521                                         return r;
1522
1523                 service_set_state(s, s->deserialized_state);
1524         }
1525
1526         return 0;
1527 }
1528
1529 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1530         Iterator i;
1531         int r;
1532         int *rfds = NULL;
1533         unsigned rn_fds = 0;
1534         Set *set, *free_set = NULL;
1535         Socket *sock;
1536
1537         assert(s);
1538         assert(fds);
1539         assert(n_fds);
1540
1541         if (s->socket_fd >= 0)
1542                 return 0;
1543
1544         if (!set_isempty(s->configured_sockets))
1545                 set = s->configured_sockets;
1546         else {
1547                 if ((r = service_get_sockets(s, &free_set)) < 0)
1548                         return r;
1549
1550                 set = free_set;
1551         }
1552
1553         SET_FOREACH(sock, set, i) {
1554                 int *cfds;
1555                 unsigned cn_fds;
1556
1557                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1558                         goto fail;
1559
1560                 if (!cfds)
1561                         continue;
1562
1563                 if (!rfds) {
1564                         rfds = cfds;
1565                         rn_fds = cn_fds;
1566                 } else {
1567                         int *t;
1568
1569                         if (!(t = new(int, rn_fds+cn_fds))) {
1570                                 free(cfds);
1571                                 r = -ENOMEM;
1572                                 goto fail;
1573                         }
1574
1575                         memcpy(t, rfds, rn_fds);
1576                         memcpy(t+rn_fds, cfds, cn_fds);
1577                         free(rfds);
1578                         free(cfds);
1579
1580                         rfds = t;
1581                         rn_fds = rn_fds+cn_fds;
1582                 }
1583         }
1584
1585         *fds = rfds;
1586         *n_fds = rn_fds;
1587
1588         set_free(free_set);
1589
1590         return 0;
1591
1592 fail:
1593         set_free(set);
1594         free(rfds);
1595
1596         return r;
1597 }
1598
1599 static int service_spawn(
1600                 Service *s,
1601                 ExecCommand *c,
1602                 bool timeout,
1603                 bool pass_fds,
1604                 bool apply_permissions,
1605                 bool apply_chroot,
1606                 bool apply_tty_stdin,
1607                 bool set_notify_socket,
1608                 pid_t *_pid) {
1609
1610         pid_t pid;
1611         int r;
1612         int *fds = NULL, *fdsbuf = NULL;
1613         unsigned n_fds = 0, n_env = 0;
1614         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1615
1616         assert(s);
1617         assert(c);
1618         assert(_pid);
1619
1620         if (pass_fds ||
1621             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1622             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1623             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1624
1625                 if (s->socket_fd >= 0) {
1626                         fds = &s->socket_fd;
1627                         n_fds = 1;
1628                 } else {
1629                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1630                                 goto fail;
1631
1632                         fds = fdsbuf;
1633                 }
1634         }
1635
1636         if (timeout && s->timeout_usec) {
1637                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1638                         goto fail;
1639         } else
1640                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1641
1642         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1643                 r = -ENOMEM;
1644                 goto fail;
1645         }
1646
1647         if (!(our_env = new0(char*, 4))) {
1648                 r = -ENOMEM;
1649                 goto fail;
1650         }
1651
1652         if (set_notify_socket)
1653                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1654                         r = -ENOMEM;
1655                         goto fail;
1656                 }
1657
1658         if (s->main_pid > 0)
1659                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1660                         r = -ENOMEM;
1661                         goto fail;
1662                 }
1663
1664         if (!(final_env = strv_env_merge(2,
1665                                          s->meta.manager->environment,
1666                                          our_env,
1667                                          NULL))) {
1668                 r = -ENOMEM;
1669                 goto fail;
1670         }
1671
1672         r = exec_spawn(c,
1673                        argv,
1674                        &s->exec_context,
1675                        fds, n_fds,
1676                        final_env,
1677                        apply_permissions,
1678                        apply_chroot,
1679                        apply_tty_stdin,
1680                        s->meta.manager->confirm_spawn,
1681                        s->meta.cgroup_bondings,
1682                        &pid);
1683
1684         if (r < 0)
1685                 goto fail;
1686
1687
1688         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1689                 /* FIXME: we need to do something here */
1690                 goto fail;
1691
1692         free(fdsbuf);
1693         strv_free(argv);
1694         strv_free(our_env);
1695         strv_free(final_env);
1696
1697         *_pid = pid;
1698
1699         return 0;
1700
1701 fail:
1702         free(fdsbuf);
1703         strv_free(argv);
1704         strv_free(our_env);
1705         strv_free(final_env);
1706
1707         if (timeout)
1708                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1709
1710         return r;
1711 }
1712
1713 static int main_pid_good(Service *s) {
1714         assert(s);
1715
1716         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1717          * don't know */
1718
1719         /* If we know the pid file, then lets just check if it is
1720          * still valid */
1721         if (s->main_pid_known)
1722                 return s->main_pid > 0;
1723
1724         /* We don't know the pid */
1725         return -EAGAIN;
1726 }
1727
1728 static int control_pid_good(Service *s) {
1729         assert(s);
1730
1731         return s->control_pid > 0;
1732 }
1733
1734 static int cgroup_good(Service *s) {
1735         int r;
1736
1737         assert(s);
1738
1739         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1740                 return r;
1741
1742         return !r;
1743 }
1744
1745 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1746         int r;
1747         assert(s);
1748
1749         if (!success)
1750                 s->failure = true;
1751
1752         if (allow_restart &&
1753             !s->forbid_restart &&
1754             (s->restart == SERVICE_RESTART_ALWAYS ||
1755              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1756              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1757              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1758               (s->main_exec_status.code == CLD_KILLED ||
1759                s->main_exec_status.code == CLD_DUMPED)))) {
1760
1761                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1762                         goto fail;
1763
1764                 service_set_state(s, SERVICE_AUTO_RESTART);
1765         } else
1766                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1767
1768         s->forbid_restart = false;
1769
1770         return;
1771
1772 fail:
1773         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1774         service_enter_dead(s, false, false);
1775 }
1776
1777 static void service_enter_signal(Service *s, ServiceState state, bool success);
1778
1779 static void service_enter_stop_post(Service *s, bool success) {
1780         int r;
1781         assert(s);
1782
1783         if (!success)
1784                 s->failure = true;
1785
1786         service_unwatch_control_pid(s);
1787
1788         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1789                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1790
1791                 if ((r = service_spawn(s,
1792                                        s->control_command,
1793                                        true,
1794                                        false,
1795                                        !s->permissions_start_only,
1796                                        !s->root_directory_start_only,
1797                                        true,
1798                                        false,
1799                                        &s->control_pid)) < 0)
1800                         goto fail;
1801
1802
1803                 service_set_state(s, SERVICE_STOP_POST);
1804         } else
1805                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1806
1807         return;
1808
1809 fail:
1810         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1811         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1812 }
1813
1814 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1815         int r;
1816         Set *pid_set = NULL;
1817         bool wait_for_exit = false;
1818
1819         assert(s);
1820
1821         if (!success)
1822                 s->failure = true;
1823
1824         if (s->exec_context.kill_mode != KILL_NONE) {
1825                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1826
1827                 if (s->main_pid > 0) {
1828                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1829                                  -s->main_pid :
1830                                  s->main_pid, sig) < 0 && errno != ESRCH)
1831
1832                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1833                         else
1834                                 wait_for_exit = true;
1835                 }
1836
1837                 if (s->control_pid > 0) {
1838                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1839                                  -s->control_pid :
1840                                  s->control_pid, sig) < 0 && errno != ESRCH)
1841
1842                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1843                         else
1844                                 wait_for_exit = true;
1845                 }
1846
1847                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1848
1849                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1850                                 r = -ENOMEM;
1851                                 goto fail;
1852                         }
1853
1854                         /* Exclude the main/control pids from being killed via the cgroup */
1855                         if (s->main_pid > 0)
1856                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1857                                         goto fail;
1858
1859                         if (s->control_pid > 0)
1860                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1861                                         goto fail;
1862
1863                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1864                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1865                                         log_warning("Failed to kill control group: %s", strerror(-r));
1866                         } else if (r > 0)
1867                                 wait_for_exit = true;
1868
1869                         set_free(pid_set);
1870                 }
1871         }
1872
1873         if (wait_for_exit) {
1874                 if (s->timeout_usec > 0)
1875                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1876                                 goto fail;
1877
1878                 service_set_state(s, state);
1879         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1880                 service_enter_stop_post(s, true);
1881         else
1882                 service_enter_dead(s, true, true);
1883
1884         return;
1885
1886 fail:
1887         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1888
1889         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1890                 service_enter_stop_post(s, false);
1891         else
1892                 service_enter_dead(s, false, true);
1893
1894         if (pid_set)
1895                 set_free(pid_set);
1896 }
1897
1898 static void service_enter_stop(Service *s, bool success) {
1899         int r;
1900
1901         assert(s);
1902
1903         if (!success)
1904                 s->failure = true;
1905
1906         service_unwatch_control_pid(s);
1907
1908         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1909                 s->control_command_id = SERVICE_EXEC_STOP;
1910
1911                 if ((r = service_spawn(s,
1912                                        s->control_command,
1913                                        true,
1914                                        false,
1915                                        !s->permissions_start_only,
1916                                        !s->root_directory_start_only,
1917                                        false,
1918                                        false,
1919                                        &s->control_pid)) < 0)
1920                         goto fail;
1921
1922                 service_set_state(s, SERVICE_STOP);
1923         } else
1924                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1925
1926         return;
1927
1928 fail:
1929         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1930         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1931 }
1932
1933 static void service_enter_running(Service *s, bool success) {
1934         int main_pid_ok, cgroup_ok;
1935         assert(s);
1936
1937         if (!success)
1938                 s->failure = true;
1939
1940         main_pid_ok = main_pid_good(s);
1941         cgroup_ok = cgroup_good(s);
1942
1943         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1944             (s->bus_name_good || s->type != SERVICE_DBUS))
1945                 service_set_state(s, SERVICE_RUNNING);
1946         else if (s->remain_after_exit)
1947                 service_set_state(s, SERVICE_EXITED);
1948         else
1949                 service_enter_stop(s, true);
1950 }
1951
1952 static void service_enter_start_post(Service *s) {
1953         int r;
1954         assert(s);
1955
1956         service_unwatch_control_pid(s);
1957
1958         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1959                 s->control_command_id = SERVICE_EXEC_START_POST;
1960
1961                 if ((r = service_spawn(s,
1962                                        s->control_command,
1963                                        true,
1964                                        false,
1965                                        !s->permissions_start_only,
1966                                        !s->root_directory_start_only,
1967                                        false,
1968                                        false,
1969                                        &s->control_pid)) < 0)
1970                         goto fail;
1971
1972                 service_set_state(s, SERVICE_START_POST);
1973         } else
1974                 service_enter_running(s, true);
1975
1976         return;
1977
1978 fail:
1979         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1980         service_enter_stop(s, false);
1981 }
1982
1983 static void service_enter_start(Service *s) {
1984         pid_t pid;
1985         int r;
1986         ExecCommand *c;
1987
1988         assert(s);
1989
1990         assert(s->exec_command[SERVICE_EXEC_START]);
1991         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1992
1993         if (s->type == SERVICE_FORKING)
1994                 service_unwatch_control_pid(s);
1995         else
1996                 service_unwatch_main_pid(s);
1997
1998         if (s->type == SERVICE_FORKING) {
1999                 s->control_command_id = SERVICE_EXEC_START;
2000                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2001
2002                 s->main_command = NULL;
2003         } else {
2004                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2005                 s->control_command = NULL;
2006
2007                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2008         }
2009
2010         if ((r = service_spawn(s,
2011                                c,
2012                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2013                                true,
2014                                true,
2015                                true,
2016                                true,
2017                                s->notify_access != NOTIFY_NONE,
2018                                &pid)) < 0)
2019                 goto fail;
2020
2021         if (s->type == SERVICE_SIMPLE) {
2022                 /* For simple services we immediately start
2023                  * the START_POST binaries. */
2024
2025                 service_set_main_pid(s, pid);
2026                 service_enter_start_post(s);
2027
2028         } else  if (s->type == SERVICE_FORKING) {
2029
2030                 /* For forking services we wait until the start
2031                  * process exited. */
2032
2033                 s->control_pid = pid;
2034                 service_set_state(s, SERVICE_START);
2035
2036         } else if (s->type == SERVICE_ONESHOT ||
2037                    s->type == SERVICE_DBUS ||
2038                    s->type == SERVICE_NOTIFY) {
2039
2040                 /* For oneshot services we wait until the start
2041                  * process exited, too, but it is our main process. */
2042
2043                 /* For D-Bus services we know the main pid right away,
2044                  * but wait for the bus name to appear on the
2045                  * bus. Notify services are similar. */
2046
2047                 service_set_main_pid(s, pid);
2048                 service_set_state(s, SERVICE_START);
2049         } else
2050                 assert_not_reached("Unknown service type");
2051
2052         return;
2053
2054 fail:
2055         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2056         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2057 }
2058
2059 static void service_enter_start_pre(Service *s) {
2060         int r;
2061
2062         assert(s);
2063
2064         service_unwatch_control_pid(s);
2065
2066         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2067                 s->control_command_id = SERVICE_EXEC_START_PRE;
2068
2069                 if ((r = service_spawn(s,
2070                                        s->control_command,
2071                                        true,
2072                                        false,
2073                                        !s->permissions_start_only,
2074                                        !s->root_directory_start_only,
2075                                        true,
2076                                        false,
2077                                        &s->control_pid)) < 0)
2078                         goto fail;
2079
2080                 service_set_state(s, SERVICE_START_PRE);
2081         } else
2082                 service_enter_start(s);
2083
2084         return;
2085
2086 fail:
2087         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2088         service_enter_dead(s, false, true);
2089 }
2090
2091 static void service_enter_restart(Service *s) {
2092         int r;
2093         DBusError error;
2094
2095         assert(s);
2096         dbus_error_init(&error);
2097
2098         if (s->meta.job) {
2099                 log_info("Job pending for unit, delaying automatic restart.");
2100
2101                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2102                         goto fail;
2103         }
2104
2105         service_enter_dead(s, true, false);
2106
2107         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2108                 goto fail;
2109
2110         log_debug("%s scheduled restart job.", s->meta.id);
2111         return;
2112
2113 fail:
2114         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2115         service_enter_dead(s, false, false);
2116
2117         dbus_error_free(&error);
2118 }
2119
2120 static void service_enter_reload(Service *s) {
2121         int r;
2122
2123         assert(s);
2124
2125         service_unwatch_control_pid(s);
2126
2127         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2128                 s->control_command_id = SERVICE_EXEC_RELOAD;
2129
2130                 if ((r = service_spawn(s,
2131                                        s->control_command,
2132                                        true,
2133                                        false,
2134                                        !s->permissions_start_only,
2135                                        !s->root_directory_start_only,
2136                                        false,
2137                                        false,
2138                                        &s->control_pid)) < 0)
2139                         goto fail;
2140
2141                 service_set_state(s, SERVICE_RELOAD);
2142         } else
2143                 service_enter_running(s, true);
2144
2145         return;
2146
2147 fail:
2148         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2149         s->reload_failure = true;
2150         service_enter_running(s, true);
2151 }
2152
2153 static void service_run_next_control(Service *s, bool success) {
2154         int r;
2155
2156         assert(s);
2157         assert(s->control_command);
2158         assert(s->control_command->command_next);
2159
2160         if (!success)
2161                 s->failure = true;
2162
2163         assert(s->control_command_id != SERVICE_EXEC_START);
2164
2165         s->control_command = s->control_command->command_next;
2166         service_unwatch_control_pid(s);
2167
2168         if ((r = service_spawn(s,
2169                                s->control_command,
2170                                true,
2171                                false,
2172                                !s->permissions_start_only,
2173                                !s->root_directory_start_only,
2174                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2175                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2176                                false,
2177                                &s->control_pid)) < 0)
2178                 goto fail;
2179
2180         return;
2181
2182 fail:
2183         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2184
2185         if (s->state == SERVICE_START_PRE)
2186                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2187         else if (s->state == SERVICE_STOP)
2188                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2189         else if (s->state == SERVICE_STOP_POST)
2190                 service_enter_dead(s, false, true);
2191         else if (s->state == SERVICE_RELOAD) {
2192                 s->reload_failure = true;
2193                 service_enter_running(s, true);
2194         } else
2195                 service_enter_stop(s, false);
2196 }
2197
2198 static void service_run_next_main(Service *s, bool success) {
2199         pid_t pid;
2200         int r;
2201
2202         assert(s);
2203         assert(s->main_command);
2204         assert(s->main_command->command_next);
2205         assert(s->type == SERVICE_ONESHOT);
2206
2207         if (!success)
2208                 s->failure = true;
2209
2210         s->main_command = s->main_command->command_next;
2211         service_unwatch_main_pid(s);
2212
2213         if ((r = service_spawn(s,
2214                                s->main_command,
2215                                false,
2216                                true,
2217                                true,
2218                                true,
2219                                true,
2220                                s->notify_access != NOTIFY_NONE,
2221                                &pid)) < 0)
2222                 goto fail;
2223
2224         service_set_main_pid(s, pid);
2225
2226         return;
2227
2228 fail:
2229         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2230         service_enter_stop(s, false);
2231 }
2232
2233 static int service_start(Unit *u) {
2234         Service *s = SERVICE(u);
2235
2236         assert(s);
2237
2238         /* We cannot fulfill this request right now, try again later
2239          * please! */
2240         if (s->state == SERVICE_STOP ||
2241             s->state == SERVICE_STOP_SIGTERM ||
2242             s->state == SERVICE_STOP_SIGKILL ||
2243             s->state == SERVICE_STOP_POST ||
2244             s->state == SERVICE_FINAL_SIGTERM ||
2245             s->state == SERVICE_FINAL_SIGKILL)
2246                 return -EAGAIN;
2247
2248         /* Already on it! */
2249         if (s->state == SERVICE_START_PRE ||
2250             s->state == SERVICE_START ||
2251             s->state == SERVICE_START_POST)
2252                 return 0;
2253
2254         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2255
2256         /* Make sure we don't enter a busy loop of some kind. */
2257         if (!ratelimit_test(&s->ratelimit)) {
2258                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2259                 return -ECANCELED;
2260         }
2261
2262         s->failure = false;
2263         s->main_pid_known = false;
2264         s->forbid_restart = false;
2265
2266         service_enter_start_pre(s);
2267         return 0;
2268 }
2269
2270 static int service_stop(Unit *u) {
2271         Service *s = SERVICE(u);
2272
2273         assert(s);
2274
2275         /* This is a user request, so don't do restarts on this
2276          * shutdown. */
2277         s->forbid_restart = true;
2278
2279         /* Already on it */
2280         if (s->state == SERVICE_STOP ||
2281             s->state == SERVICE_STOP_SIGTERM ||
2282             s->state == SERVICE_STOP_SIGKILL ||
2283             s->state == SERVICE_STOP_POST ||
2284             s->state == SERVICE_FINAL_SIGTERM ||
2285             s->state == SERVICE_FINAL_SIGKILL)
2286                 return 0;
2287
2288         /* Don't allow a restart */
2289         if (s->state == SERVICE_AUTO_RESTART) {
2290                 service_set_state(s, SERVICE_DEAD);
2291                 return 0;
2292         }
2293
2294         /* If there's already something running we go directly into
2295          * kill mode. */
2296         if (s->state == SERVICE_START_PRE ||
2297             s->state == SERVICE_START ||
2298             s->state == SERVICE_START_POST ||
2299             s->state == SERVICE_RELOAD) {
2300                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2301                 return 0;
2302         }
2303
2304         assert(s->state == SERVICE_RUNNING ||
2305                s->state == SERVICE_EXITED);
2306
2307         service_enter_stop(s, true);
2308         return 0;
2309 }
2310
2311 static int service_reload(Unit *u) {
2312         Service *s = SERVICE(u);
2313
2314         assert(s);
2315
2316         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2317
2318         service_enter_reload(s);
2319         return 0;
2320 }
2321
2322 static bool service_can_reload(Unit *u) {
2323         Service *s = SERVICE(u);
2324
2325         assert(s);
2326
2327         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2328 }
2329
2330 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2331         Service *s = SERVICE(u);
2332
2333         assert(u);
2334         assert(f);
2335         assert(fds);
2336
2337         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2338         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2339
2340         if (s->control_pid > 0)
2341                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2342
2343         if (s->main_pid_known && s->main_pid > 0)
2344                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2345
2346         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2347
2348         if (s->status_text)
2349                 unit_serialize_item(u, f, "status-text", s->status_text);
2350
2351         /* There's a minor uncleanliness here: if there are multiple
2352          * commands attached here, we will start from the first one
2353          * again */
2354         if (s->control_command_id >= 0)
2355                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2356
2357         if (s->socket_fd >= 0) {
2358                 int copy;
2359
2360                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2361                         return copy;
2362
2363                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2364         }
2365
2366         if (s->main_exec_status.pid > 0) {
2367                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2368                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2369                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2370
2371                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2372                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2373                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2374                 }
2375         }
2376
2377         return 0;
2378 }
2379
2380 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2381         Service *s = SERVICE(u);
2382
2383         assert(u);
2384         assert(key);
2385         assert(value);
2386         assert(fds);
2387
2388         if (streq(key, "state")) {
2389                 ServiceState state;
2390
2391                 if ((state = service_state_from_string(value)) < 0)
2392                         log_debug("Failed to parse state value %s", value);
2393                 else
2394                         s->deserialized_state = state;
2395         } else if (streq(key, "failure")) {
2396                 int b;
2397
2398                 if ((b = parse_boolean(value)) < 0)
2399                         log_debug("Failed to parse failure value %s", value);
2400                 else
2401                         s->failure = b || s->failure;
2402         } else if (streq(key, "control-pid")) {
2403                 pid_t pid;
2404
2405                 if (parse_pid(value, &pid) < 0)
2406                         log_debug("Failed to parse control-pid value %s", value);
2407                 else
2408                         s->control_pid = pid;
2409         } else if (streq(key, "main-pid")) {
2410                 pid_t pid;
2411
2412                 if (parse_pid(value, &pid) < 0)
2413                         log_debug("Failed to parse main-pid value %s", value);
2414                 else
2415                         service_set_main_pid(s, (pid_t) pid);
2416         } else if (streq(key, "main-pid-known")) {
2417                 int b;
2418
2419                 if ((b = parse_boolean(value)) < 0)
2420                         log_debug("Failed to parse main-pid-known value %s", value);
2421                 else
2422                         s->main_pid_known = b;
2423         } else if (streq(key, "status-text")) {
2424                 char *t;
2425
2426                 if ((t = strdup(value))) {
2427                         free(s->status_text);
2428                         s->status_text = t;
2429                 }
2430
2431         } else if (streq(key, "control-command")) {
2432                 ServiceExecCommand id;
2433
2434                 if ((id = service_exec_command_from_string(value)) < 0)
2435                         log_debug("Failed to parse exec-command value %s", value);
2436                 else {
2437                         s->control_command_id = id;
2438                         s->control_command = s->exec_command[id];
2439                 }
2440         } else if (streq(key, "socket-fd")) {
2441                 int fd;
2442
2443                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2444                         log_debug("Failed to parse socket-fd value %s", value);
2445                 else {
2446
2447                         if (s->socket_fd >= 0)
2448                                 close_nointr_nofail(s->socket_fd);
2449                         s->socket_fd = fdset_remove(fds, fd);
2450                 }
2451         } else if (streq(key, "main-exec-status-pid")) {
2452                 pid_t pid;
2453
2454                 if (parse_pid(value, &pid) < 0)
2455                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2456                 else
2457                         s->main_exec_status.pid = pid;
2458         } else if (streq(key, "main-exec-status-code")) {
2459                 int i;
2460
2461                 if (safe_atoi(value, &i) < 0)
2462                         log_debug("Failed to parse main-exec-status-code value %s", value);
2463                 else
2464                         s->main_exec_status.code = i;
2465         } else if (streq(key, "main-exec-status-status")) {
2466                 int i;
2467
2468                 if (safe_atoi(value, &i) < 0)
2469                         log_debug("Failed to parse main-exec-status-status value %s", value);
2470                 else
2471                         s->main_exec_status.status = i;
2472         } else if (streq(key, "main-exec-status-start"))
2473                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2474         else if (streq(key, "main-exec-status-exit"))
2475                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2476         else
2477                 log_debug("Unknown serialization key '%s'", key);
2478
2479         return 0;
2480 }
2481
2482 static UnitActiveState service_active_state(Unit *u) {
2483         assert(u);
2484
2485         return state_translation_table[SERVICE(u)->state];
2486 }
2487
2488 static const char *service_sub_state_to_string(Unit *u) {
2489         assert(u);
2490
2491         return service_state_to_string(SERVICE(u)->state);
2492 }
2493
2494 #ifdef HAVE_SYSV_COMPAT
2495 static bool service_check_gc(Unit *u) {
2496         Service *s = SERVICE(u);
2497
2498         assert(s);
2499
2500         return !!s->sysv_path;
2501 }
2502 #endif
2503
2504 static bool service_check_snapshot(Unit *u) {
2505         Service *s = SERVICE(u);
2506
2507         assert(s);
2508
2509         return !s->got_socket_fd;
2510 }
2511
2512 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2513         Service *s = SERVICE(u);
2514         bool success;
2515
2516         assert(s);
2517         assert(pid >= 0);
2518
2519         if (!s->meta.fragment_path)
2520                 success = is_clean_exit_lsb(code, status);
2521         else
2522                 success = is_clean_exit(code, status);
2523
2524         if (s->main_pid == pid) {
2525
2526                 s->main_pid = 0;
2527                 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2528
2529                 /* If this is not a forking service than the main
2530                  * process got started and hence we copy the exit
2531                  * status so that it is recorded both as main and as
2532                  * control process exit status */
2533                 if (s->main_command) {
2534                         s->main_command->exec_status = s->main_exec_status;
2535
2536                         if (s->main_command->ignore)
2537                                 success = true;
2538                 }
2539
2540                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2541                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2542                 s->failure = s->failure || !success;
2543
2544                 if (s->main_command &&
2545                     s->main_command->command_next &&
2546                     success) {
2547
2548                         /* There is another command to *
2549                          * execute, so let's do that. */
2550
2551                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2552                         service_run_next_main(s, success);
2553
2554                 } else {
2555
2556                         /* The service exited, so the service is officially
2557                          * gone. */
2558                         s->main_command = NULL;
2559
2560                         switch (s->state) {
2561
2562                         case SERVICE_START_POST:
2563                         case SERVICE_RELOAD:
2564                         case SERVICE_STOP:
2565                                 /* Need to wait until the operation is
2566                                  * done */
2567                                 break;
2568
2569                         case SERVICE_START:
2570                                 if (s->type == SERVICE_ONESHOT) {
2571                                         /* This was our main goal, so let's go on */
2572                                         if (success)
2573                                                 service_enter_start_post(s);
2574                                         else
2575                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2576                                         break;
2577                                 } else {
2578                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2579
2580                                         /* Fall through */
2581                                 }
2582
2583                         case SERVICE_RUNNING:
2584                                 service_enter_running(s, success);
2585                                 break;
2586
2587                         case SERVICE_STOP_SIGTERM:
2588                         case SERVICE_STOP_SIGKILL:
2589
2590                                 if (!control_pid_good(s))
2591                                         service_enter_stop_post(s, success);
2592
2593                                 /* If there is still a control process, wait for that first */
2594                                 break;
2595
2596                         default:
2597                                 assert_not_reached("Uh, main process died at wrong time.");
2598                         }
2599                 }
2600
2601         } else if (s->control_pid == pid) {
2602
2603                 s->control_pid = 0;
2604
2605                 if (s->control_command) {
2606                         exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2607
2608                         if (s->control_command->ignore)
2609                                 success = true;
2610                 }
2611
2612                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2613                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2614                 s->failure = s->failure || !success;
2615
2616                 if (s->control_command &&
2617                     s->control_command->command_next &&
2618                     success) {
2619
2620                         /* There is another command to *
2621                          * execute, so let's do that. */
2622
2623                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2624                         service_run_next_control(s, success);
2625
2626                 } else {
2627                         /* No further commands for this step, so let's
2628                          * figure out what to do next */
2629
2630                         s->control_command = NULL;
2631                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2632
2633                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2634
2635                         switch (s->state) {
2636
2637                         case SERVICE_START_PRE:
2638                                 if (success)
2639                                         service_enter_start(s);
2640                                 else
2641                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2642                                 break;
2643
2644                         case SERVICE_START:
2645                                 assert(s->type == SERVICE_FORKING);
2646
2647                                 /* Let's try to load the pid
2648                                  * file here if we can. We
2649                                  * ignore the return value,
2650                                  * since the PID file might
2651                                  * actually be created by a
2652                                  * START_POST script */
2653
2654                                 if (success) {
2655                                         service_load_pid_file(s);
2656                                         service_search_main_pid(s);
2657
2658                                         service_enter_start_post(s);
2659                                 } else
2660                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2661
2662                                 break;
2663
2664                         case SERVICE_START_POST:
2665                                 if (success && s->pid_file && !s->main_pid_known) {
2666                                         int r;
2667
2668                                         /* Hmm, let's see if we can
2669                                          * load the pid now after the
2670                                          * start-post scripts got
2671                                          * executed. */
2672
2673                                         if ((r = service_load_pid_file(s)) < 0)
2674                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2675                                 }
2676
2677                                 /* Fall through */
2678
2679                         case SERVICE_RELOAD:
2680                                 s->reload_failure = !success;
2681                                 service_enter_running(s, true);
2682                                 break;
2683
2684                         case SERVICE_STOP:
2685                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2686                                 break;
2687
2688                         case SERVICE_STOP_SIGTERM:
2689                         case SERVICE_STOP_SIGKILL:
2690                                 if (main_pid_good(s) <= 0)
2691                                         service_enter_stop_post(s, success);
2692
2693                                 /* If there is still a service
2694                                  * process around, wait until
2695                                  * that one quit, too */
2696                                 break;
2697
2698                         case SERVICE_STOP_POST:
2699                         case SERVICE_FINAL_SIGTERM:
2700                         case SERVICE_FINAL_SIGKILL:
2701                                 service_enter_dead(s, success, true);
2702                                 break;
2703
2704                         default:
2705                                 assert_not_reached("Uh, control process died at wrong time.");
2706                         }
2707                 }
2708         }
2709
2710         /* Notify clients about changed exit status */
2711         unit_add_to_dbus_queue(u);
2712 }
2713
2714 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2715         Service *s = SERVICE(u);
2716
2717         assert(s);
2718         assert(elapsed == 1);
2719
2720         assert(w == &s->timer_watch);
2721
2722         switch (s->state) {
2723
2724         case SERVICE_START_PRE:
2725         case SERVICE_START:
2726                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2727                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2728                 break;
2729
2730         case SERVICE_START_POST:
2731                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2732                 service_enter_stop(s, false);
2733                 break;
2734
2735         case SERVICE_RELOAD:
2736                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2737                 s->reload_failure = true;
2738                 service_enter_running(s, true);
2739                 break;
2740
2741         case SERVICE_STOP:
2742                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2743                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2744                 break;
2745
2746         case SERVICE_STOP_SIGTERM:
2747                 if (s->exec_context.send_sigkill) {
2748                         log_warning("%s stopping timed out. Killing.", u->meta.id);
2749                         service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2750                 } else {
2751                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2752                         service_enter_stop_post(s, false);
2753                 }
2754
2755                 break;
2756
2757         case SERVICE_STOP_SIGKILL:
2758                 /* Uh, wie sent a SIGKILL and it is still not gone?
2759                  * Must be something we cannot kill, so let's just be
2760                  * weirded out and continue */
2761
2762                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2763                 service_enter_stop_post(s, false);
2764                 break;
2765
2766         case SERVICE_STOP_POST:
2767                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2768                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2769                 break;
2770
2771         case SERVICE_FINAL_SIGTERM:
2772                 if (s->exec_context.send_sigkill) {
2773                         log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2774                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2775                 } else {
2776                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2777                         service_enter_dead(s, false, true);
2778                 }
2779
2780                 break;
2781
2782         case SERVICE_FINAL_SIGKILL:
2783                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2784                 service_enter_dead(s, false, true);
2785                 break;
2786
2787         case SERVICE_AUTO_RESTART:
2788                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2789                 service_enter_restart(s);
2790                 break;
2791
2792         default:
2793                 assert_not_reached("Timeout at wrong time.");
2794         }
2795 }
2796
2797 static void service_cgroup_notify_event(Unit *u) {
2798         Service *s = SERVICE(u);
2799
2800         assert(u);
2801
2802         log_debug("%s: cgroup is empty", u->meta.id);
2803
2804         switch (s->state) {
2805
2806                 /* Waiting for SIGCHLD is usually more interesting,
2807                  * because it includes return codes/signals. Which is
2808                  * why we ignore the cgroup events for most cases,
2809                  * except when we don't know pid which to expect the
2810                  * SIGCHLD for. */
2811
2812         case SERVICE_RUNNING:
2813                 service_enter_running(s, true);
2814                 break;
2815
2816         case SERVICE_STOP_SIGTERM:
2817         case SERVICE_STOP_SIGKILL:
2818                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2819                         service_enter_stop_post(s, true);
2820
2821                 break;
2822
2823         case SERVICE_FINAL_SIGTERM:
2824         case SERVICE_FINAL_SIGKILL:
2825                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2826                         service_enter_dead(s, true, true);
2827
2828                 break;
2829
2830         default:
2831                 ;
2832         }
2833 }
2834
2835 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2836         Service *s = SERVICE(u);
2837         const char *e;
2838
2839         assert(u);
2840
2841         if (s->notify_access == NOTIFY_NONE) {
2842                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2843                             u->meta.id, (unsigned long) pid);
2844                 return;
2845         }
2846
2847         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2848                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2849                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2850                 return;
2851         }
2852
2853         log_debug("%s: Got message", u->meta.id);
2854
2855         /* Interpret MAINPID= */
2856         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2857             (s->state == SERVICE_START ||
2858              s->state == SERVICE_START_POST ||
2859              s->state == SERVICE_RUNNING ||
2860              s->state == SERVICE_RELOAD)) {
2861
2862                 if (parse_pid(e + 8, &pid) < 0)
2863                         log_warning("Failed to parse notification message %s", e);
2864                 else {
2865                         log_debug("%s: got %s", u->meta.id, e);
2866                         service_set_main_pid(s, pid);
2867                 }
2868         }
2869
2870         /* Interpret READY= */
2871         if (s->type == SERVICE_NOTIFY &&
2872             s->state == SERVICE_START &&
2873             strv_find(tags, "READY=1")) {
2874                 log_debug("%s: got READY=1", u->meta.id);
2875
2876                 service_enter_start_post(s);
2877         }
2878
2879         /* Interpret STATUS= */
2880         if ((e = strv_find_prefix(tags, "STATUS="))) {
2881                 char *t;
2882
2883                 if (e[7]) {
2884                         if (!(t = strdup(e+7))) {
2885                                 log_error("Failed to allocate string.");
2886                                 return;
2887                         }
2888
2889                         log_debug("%s: got %s", u->meta.id, e);
2890
2891                         free(s->status_text);
2892                         s->status_text = t;
2893                 } else {
2894                         free(s->status_text);
2895                         s->status_text = NULL;
2896                 }
2897
2898         }
2899
2900         /* Notify clients about changed status or main pid */
2901         unit_add_to_dbus_queue(u);
2902 }
2903
2904 #ifdef HAVE_SYSV_COMPAT
2905 static int service_enumerate(Manager *m) {
2906         char **p;
2907         unsigned i;
2908         DIR *d = NULL;
2909         char *path = NULL, *fpath = NULL, *name = NULL;
2910         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2911         Unit *service;
2912         Iterator j;
2913         int r;
2914
2915         assert(m);
2916
2917         zero(runlevel_services);
2918
2919         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2920                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2921                         struct dirent *de;
2922
2923                         free(path);
2924                         path = NULL;
2925                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2926                                 r = -ENOMEM;
2927                                 goto finish;
2928                         }
2929
2930                         if (d)
2931                                 closedir(d);
2932
2933                         if (!(d = opendir(path))) {
2934                                 if (errno != ENOENT)
2935                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2936
2937                                 continue;
2938                         }
2939
2940                         while ((de = readdir(d))) {
2941                                 int a, b;
2942
2943                                 if (ignore_file(de->d_name))
2944                                         continue;
2945
2946                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2947                                         continue;
2948
2949                                 if (strlen(de->d_name) < 4)
2950                                         continue;
2951
2952                                 a = undecchar(de->d_name[1]);
2953                                 b = undecchar(de->d_name[2]);
2954
2955                                 if (a < 0 || b < 0)
2956                                         continue;
2957
2958                                 free(fpath);
2959                                 fpath = NULL;
2960                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2961                                         r = -ENOMEM;
2962                                         goto finish;
2963                                 }
2964
2965                                 if (access(fpath, X_OK) < 0) {
2966
2967                                         if (errno != ENOENT)
2968                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2969
2970                                         continue;
2971                                 }
2972
2973                                 free(name);
2974                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2975                                         r = -ENOMEM;
2976                                         goto finish;
2977                                 }
2978
2979                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2980                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2981                                         continue;
2982                                 }
2983
2984                                 if (de->d_name[0] == 'S')  {
2985
2986                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
2987                                                 SERVICE(service)->sysv_start_priority =
2988                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2989
2990                                                 SERVICE(service)->sysv_enabled = true;
2991                                         }
2992
2993                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
2994                                                 goto finish;
2995
2996                                         if ((r = set_put(runlevel_services[i], service)) < 0)
2997                                                 goto finish;
2998
2999                                 } else if (de->d_name[0] == 'K' &&
3000                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
3001                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3002
3003                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3004                                                 goto finish;
3005
3006                                         if ((r = set_put(shutdown_services, service)) < 0)
3007                                                 goto finish;
3008                                 }
3009                         }
3010                 }
3011
3012         /* Now we loaded all stubs and are aware of the lowest
3013         start-up priority for all services, not let's actually load
3014         the services, this will also tell us which services are
3015         actually native now */
3016         manager_dispatch_load_queue(m);
3017
3018         /* If this is a native service, rely on native ways to pull in
3019          * a service, don't pull it in via sysv rcN.d links. */
3020         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3021                 SET_FOREACH(service, runlevel_services[i], j) {
3022                         service = unit_follow_merge(service);
3023
3024                         if (service->meta.fragment_path)
3025                                 continue;
3026
3027                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3028                                 goto finish;
3029                 }
3030
3031         /* We honour K links only for halt/reboot. For the normal
3032          * runlevels we assume the stop jobs will be implicitly added
3033          * by the core logic. Also, we don't really distuingish here
3034          * between the runlevels 0 and 6 and just add them to the
3035          * special shutdown target. On SUSE the boot.d/ runlevel is
3036          * also used for shutdown, so we add links for that too to the
3037          * shutdown target.*/
3038         SET_FOREACH(service, shutdown_services, j) {
3039                 service = unit_follow_merge(service);
3040
3041                 if (service->meta.fragment_path)
3042                         continue;
3043
3044                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3045                         goto finish;
3046         }
3047
3048         r = 0;
3049
3050 finish:
3051         free(path);
3052         free(fpath);
3053         free(name);
3054
3055         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3056                 set_free(runlevel_services[i]);
3057         set_free(shutdown_services);
3058
3059         if (d)
3060                 closedir(d);
3061
3062         return r;
3063 }
3064 #endif
3065
3066 static void service_bus_name_owner_change(
3067                 Unit *u,
3068                 const char *name,
3069                 const char *old_owner,
3070                 const char *new_owner) {
3071
3072         Service *s = SERVICE(u);
3073
3074         assert(s);
3075         assert(name);
3076
3077         assert(streq(s->bus_name, name));
3078         assert(old_owner || new_owner);
3079
3080         if (old_owner && new_owner)
3081                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3082         else if (old_owner)
3083                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3084         else
3085                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3086
3087         s->bus_name_good = !!new_owner;
3088
3089         if (s->type == SERVICE_DBUS) {
3090
3091                 /* service_enter_running() will figure out what to
3092                  * do */
3093                 if (s->state == SERVICE_RUNNING)
3094                         service_enter_running(s, true);
3095                 else if (s->state == SERVICE_START && new_owner)
3096                         service_enter_start_post(s);
3097
3098         } else if (new_owner &&
3099                    s->main_pid <= 0 &&
3100                    (s->state == SERVICE_START ||
3101                     s->state == SERVICE_START_POST ||
3102                     s->state == SERVICE_RUNNING ||
3103                     s->state == SERVICE_RELOAD)) {
3104
3105                 /* Try to acquire PID from bus service */
3106                 log_debug("Trying to acquire PID from D-Bus name...");
3107
3108                 bus_query_pid(u->meta.manager, name);
3109         }
3110 }
3111
3112 static void service_bus_query_pid_done(
3113                 Unit *u,
3114                 const char *name,
3115                 pid_t pid) {
3116
3117         Service *s = SERVICE(u);
3118
3119         assert(s);
3120         assert(name);
3121
3122         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3123
3124         if (s->main_pid <= 0 &&
3125             (s->state == SERVICE_START ||
3126              s->state == SERVICE_START_POST ||
3127              s->state == SERVICE_RUNNING ||
3128              s->state == SERVICE_RELOAD))
3129                 service_set_main_pid(s, pid);
3130 }
3131
3132 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3133         assert(s);
3134         assert(fd >= 0);
3135
3136         /* This is called by the socket code when instantiating a new
3137          * service for a stream socket and the socket needs to be
3138          * configured. */
3139
3140         if (s->meta.load_state != UNIT_LOADED)
3141                 return -EINVAL;
3142
3143         if (s->socket_fd >= 0)
3144                 return -EBUSY;
3145
3146         if (s->state != SERVICE_DEAD)
3147                 return -EAGAIN;
3148
3149         s->socket_fd = fd;
3150         s->got_socket_fd = true;
3151         s->accept_socket = sock;
3152
3153         return 0;
3154 }
3155
3156 static void service_reset_failed(Unit *u) {
3157         Service *s = SERVICE(u);
3158
3159         assert(s);
3160
3161         if (s->state == SERVICE_FAILED)
3162                 service_set_state(s, SERVICE_DEAD);
3163
3164         s->failure = false;
3165 }
3166
3167 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3168         Service *s = SERVICE(u);
3169         int r = 0;
3170         Set *pid_set = NULL;
3171
3172         assert(s);
3173
3174         if (s->main_pid <= 0 && who == KILL_MAIN) {
3175                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3176                 return -EINVAL;
3177         }
3178
3179         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3180                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3181                 return -ENOENT;
3182         }
3183
3184         if (s->control_pid > 0)
3185                 if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0)
3186                         r = -errno;
3187
3188         if (s->main_pid > 0)
3189                 if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0)
3190                         r = -errno;
3191
3192         if (mode == KILL_CONTROL_GROUP) {
3193                 int q;
3194
3195                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3196                         return -ENOMEM;
3197
3198                 /* Exclude the control/main pid from being killed via the cgroup */
3199                 if (s->control_pid > 0)
3200                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3201                                 r = q;
3202                                 goto finish;
3203                         }
3204
3205                 if (s->main_pid > 0)
3206                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3207                                 r = q;
3208                                 goto finish;
3209                         }
3210
3211                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, pid_set)) < 0)
3212                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3213                                 r = q;
3214         }
3215
3216 finish:
3217         if (pid_set)
3218                 set_free(pid_set);
3219
3220         return r;
3221 }
3222
3223 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3224         [SERVICE_DEAD] = "dead",
3225         [SERVICE_START_PRE] = "start-pre",
3226         [SERVICE_START] = "start",
3227         [SERVICE_START_POST] = "start-post",
3228         [SERVICE_RUNNING] = "running",
3229         [SERVICE_EXITED] = "exited",
3230         [SERVICE_RELOAD] = "reload",
3231         [SERVICE_STOP] = "stop",
3232         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3233         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3234         [SERVICE_STOP_POST] = "stop-post",
3235         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3236         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3237         [SERVICE_FAILED] = "failed",
3238         [SERVICE_AUTO_RESTART] = "auto-restart",
3239 };
3240
3241 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3242
3243 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3244         [SERVICE_RESTART_NO] = "no",
3245         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3246         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3247         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3248         [SERVICE_RESTART_ALWAYS] = "always"
3249 };
3250
3251 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3252
3253 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3254         [SERVICE_SIMPLE] = "simple",
3255         [SERVICE_FORKING] = "forking",
3256         [SERVICE_ONESHOT] = "oneshot",
3257         [SERVICE_DBUS] = "dbus",
3258         [SERVICE_NOTIFY] = "notify"
3259 };
3260
3261 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3262
3263 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3264         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3265         [SERVICE_EXEC_START] = "ExecStart",
3266         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3267         [SERVICE_EXEC_RELOAD] = "ExecReload",
3268         [SERVICE_EXEC_STOP] = "ExecStop",
3269         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3270 };
3271
3272 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3273
3274 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3275         [NOTIFY_NONE] = "none",
3276         [NOTIFY_MAIN] = "main",
3277         [NOTIFY_ALL] = "all"
3278 };
3279
3280 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3281
3282 const UnitVTable service_vtable = {
3283         .suffix = ".service",
3284         .show_status = true,
3285
3286         .init = service_init,
3287         .done = service_done,
3288         .load = service_load,
3289
3290         .coldplug = service_coldplug,
3291
3292         .dump = service_dump,
3293
3294         .start = service_start,
3295         .stop = service_stop,
3296         .reload = service_reload,
3297
3298         .can_reload = service_can_reload,
3299
3300         .kill = service_kill,
3301
3302         .serialize = service_serialize,
3303         .deserialize_item = service_deserialize_item,
3304
3305         .active_state = service_active_state,
3306         .sub_state_to_string = service_sub_state_to_string,
3307
3308 #ifdef HAVE_SYSV_COMPAT
3309         .check_gc = service_check_gc,
3310 #endif
3311         .check_snapshot = service_check_snapshot,
3312
3313         .sigchld_event = service_sigchld_event,
3314         .timer_event = service_timer_event,
3315
3316         .reset_failed = service_reset_failed,
3317
3318         .cgroup_notify_empty = service_cgroup_notify_event,
3319         .notify_message = service_notify_message,
3320
3321         .bus_name_owner_change = service_bus_name_owner_change,
3322         .bus_query_pid_done = service_bus_query_pid_done,
3323
3324         .bus_interface = "org.freedesktop.systemd1.Service",
3325         .bus_message_handler = bus_service_message_handler,
3326         .bus_invalidating_properties =  bus_service_invalidating_properties,
3327
3328 #ifdef HAVE_SYSV_COMPAT
3329         .enumerate = service_enumerate
3330 #endif
3331 };