src/service.c

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