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
  37 #define COMMENTS "#;\n"
  38 #define NEWLINES "\n\r"
  39 #define LINE_MAX 4096
  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_ACTIVE_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_INACTIVE,
  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         return 0;
 148 }
 149
 150 static void service_close_socket_fd(Service *s) {
 151         assert(s);
 152
 153         if (s->socket_fd < 0)
 154                 return;
 155
 156         close_nointr_nofail(s->socket_fd);
 157         s->socket_fd = -1;
 158 }
 159
 160 static void service_connection_unref(Service *s) {
 161         assert(s);
 162
 163         if (!s->socket)
 164                 return;
 165
 166         socket_connection_unref(s->socket);
 167         s->socket = NULL;
 168 }
 169
 170 static void service_done(Unit *u) {
 171         Service *s = SERVICE(u);
 172
 173         assert(s);
 174
 175         free(s->pid_file);
 176         s->pid_file = NULL;
 177
 178         free(s->sysv_path);
 179         s->sysv_path = NULL;
 180
 181         free(s->sysv_runlevels);
 182         s->sysv_runlevels = NULL;
 183
 184         free(s->status_text);
 185         s->status_text = NULL;
 186
 187         exec_context_done(&s->exec_context);
 188         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 189         s->control_command = NULL;
 190
 191         /* This will leak a process, but at least no memory or any of
 192          * our resources */
 193         service_unwatch_main_pid(s);
 194         service_unwatch_control_pid(s);
 195
 196         if (s->bus_name)  {
 197                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 198                 free(s->bus_name);
 199                 s->bus_name = NULL;
 200         }
 201
 202         service_close_socket_fd(s);
 203         service_connection_unref(s);
 204
 205         unit_unwatch_timer(u, &s->timer_watch);
 206 }
 207
 208 static char *sysv_translate_name(const char *name) {
 209         char *r;
 210
 211         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 212                 return NULL;
 213
 214         if (startswith(name, "boot."))
 215                 /* Drop SuSE-style boot. prefix */
 216                 strcpy(stpcpy(r, name + 5), ".service");
 217         else if (endswith(name, ".sh"))
 218                 /* Drop Debian-style .sh suffix */
 219                 strcpy(stpcpy(r, name) - 3, ".service");
 220         else
 221                 /* Normal init scripts */
 222                 strcpy(stpcpy(r, name), ".service");
 223
 224         return r;
 225 }
 226
 227 static int sysv_translate_facility(const char *name, char **_r) {
 228
 229         static const char * const table[] = {
 230                 /* LSB defined facilities */
 231                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 232                 "$network",   SPECIAL_NETWORK_TARGET,
 233                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 234                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 235                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 236                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 237                 "$time",      SPECIAL_RTC_SET_TARGET,
 238
 239                 /* Debian extensions */
 240                 "$mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 241                 "$mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 242                 "$x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE
 243         };
 244
 245         unsigned i;
 246         char *r;
 247
 248         for (i = 0; i < ELEMENTSOF(table); i += 2)
 249                 if (streq(table[i], name)) {
 250                         if (!(r = strdup(table[i+1])))
 251                                 return -ENOMEM;
 252
 253                         goto finish;
 254                 }
 255
 256         if (*name == '$')
 257                 return 0;
 258
 259         if (!(r = sysv_translate_name(name)))
 260                 return -ENOMEM;
 261
 262 finish:
 263
 264         if (_r)
 265                 *_r = r;
 266
 267         return 1;
 268 }
 269
 270 static int sysv_fix_order(Service *s) {
 271         Meta *other;
 272         int r;
 273
 274         assert(s);
 275
 276         if (s->sysv_start_priority < 0)
 277                 return 0;
 278
 279         /* For each pair of services where at least one lacks a LSB
 280          * header, we use the start priority value to order things. */
 281
 282         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 283                 Service *t;
 284                 UnitDependency d;
 285
 286                 t = (Service*) other;
 287
 288                 if (s == t)
 289                         continue;
 290
 291                 if (t->sysv_start_priority < 0)
 292                         continue;
 293
 294                 /* If both units have modern headers we don't care
 295                  * about the priorities */
 296                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 297                     (!t->sysv_path || t->sysv_has_lsb))
 298                         continue;
 299
 300                 if (t->sysv_start_priority < s->sysv_start_priority)
 301                         d = UNIT_AFTER;
 302                 else if (t->sysv_start_priority > s->sysv_start_priority)
 303                         d = UNIT_BEFORE;
 304                 else
 305                         continue;
 306
 307                 /* FIXME: Maybe we should compare the name here lexicographically? */
 308
 309                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 310                         return r;
 311         }
 312
 313         return 0;
 314 }
 315
 316 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 317         ExecCommand *c;
 318
 319         if (!(c = new0(ExecCommand, 1)))
 320                 return NULL;
 321
 322         if (!(c->path = strdup(path))) {
 323                 free(c);
 324                 return NULL;
 325         }
 326
 327         if (!(c->argv = strv_new(path, arg1, NULL))) {
 328                 free(c->path);
 329                 free(c);
 330                 return NULL;
 331         }
 332
 333         return c;
 334 }
 335
 336 static int sysv_exec_commands(Service *s) {
 337         ExecCommand *c;
 338
 339         assert(s);
 340         assert(s->sysv_path);
 341
 342         if (!(c = exec_command_new(s->sysv_path, "start")))
 343                 return -ENOMEM;
 344         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 345
 346         if (!(c = exec_command_new(s->sysv_path, "stop")))
 347                 return -ENOMEM;
 348         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 349
 350         if (!(c = exec_command_new(s->sysv_path, "reload")))
 351                 return -ENOMEM;
 352         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 353
 354         return 0;
 355 }
 356
 357 static int service_load_sysv_path(Service *s, const char *path) {
 358         FILE *f;
 359         Unit *u;
 360         unsigned line = 0;
 361         int r;
 362         enum {
 363                 NORMAL,
 364                 DESCRIPTION,
 365                 LSB,
 366                 LSB_DESCRIPTION
 367         } state = NORMAL;
 368
 369         assert(s);
 370         assert(path);
 371
 372         u = UNIT(s);
 373
 374         if (!(f = fopen(path, "re"))) {
 375                 r = errno == ENOENT ? 0 : -errno;
 376                 goto finish;
 377         }
 378
 379         free(s->sysv_path);
 380         if (!(s->sysv_path = strdup(path))) {
 381                 r = -ENOMEM;
 382                 goto finish;
 383         }
 384
 385         while (!feof(f)) {
 386                 char l[LINE_MAX], *t;
 387
 388                 if (!fgets(l, sizeof(l), f)) {
 389                         if (feof(f))
 390                                 break;
 391
 392                         r = -errno;
 393                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 394                         goto finish;
 395                 }
 396
 397                 line++;
 398
 399                 t = strstrip(l);
 400                 if (*t != '#')
 401                         continue;
 402
 403                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 404                         state = LSB;
 405                         s->sysv_has_lsb = true;
 406                         continue;
 407                 }
 408
 409                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 410                         state = NORMAL;
 411                         continue;
 412                 }
 413
 414                 t++;
 415                 t += strspn(t, WHITESPACE);
 416
 417                 if (state == NORMAL) {
 418
 419                         /* Try to parse Red Hat style chkconfig headers */
 420
 421                         if (startswith_no_case(t, "chkconfig:")) {
 422                                 int start_priority;
 423                                 char runlevels[16], *k;
 424
 425                                 state = NORMAL;
 426
 427                                 if (sscanf(t+10, "%15s %i %*i",
 428                                            runlevels,
 429                                            &start_priority) != 2) {
 430
 431                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 432                                         continue;
 433                                 }
 434
 435                                 /* A start priority gathered from the
 436                                  * symlink farms is preferred over the
 437                                  * data from the LSB header. */
 438                                 if (start_priority < 0 || start_priority > 99)
 439                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 440                                 else if (s->sysv_start_priority < 0)
 441                                         s->sysv_start_priority = start_priority;
 442
 443                                 char_array_0(runlevels);
 444                                 k = delete_chars(runlevels, WHITESPACE "-");
 445
 446                                 if (k[0]) {
 447                                         char *d;
 448
 449                                         if (!(d = strdup(k))) {
 450                                                 r = -ENOMEM;
 451                                                 goto finish;
 452                                         }
 453
 454                                         free(s->sysv_runlevels);
 455                                         s->sysv_runlevels = d;
 456                                 }
 457
 458                         } else if (startswith_no_case(t, "description:")) {
 459
 460                                 size_t k = strlen(t);
 461                                 char *d;
 462
 463                                 if (t[k-1] == '\\') {
 464                                         state = DESCRIPTION;
 465                                         t[k-1] = 0;
 466                                 }
 467
 468                                 if (!(d = strdup(strstrip(t+12)))) {
 469                                         r = -ENOMEM;
 470                                         goto finish;
 471                                 }
 472
 473                                 free(u->meta.description);
 474                                 u->meta.description = d;
 475
 476                         } else if (startswith_no_case(t, "pidfile:")) {
 477
 478                                 char *fn;
 479
 480                                 state = NORMAL;
 481
 482                                 fn = strstrip(t+8);
 483                                 if (!path_is_absolute(fn)) {
 484                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 485                                         continue;
 486                                 }
 487
 488                                 if (!(fn = strdup(fn))) {
 489                                         r = -ENOMEM;
 490                                         goto finish;
 491                                 }
 492
 493                                 free(s->pid_file);
 494                                 s->pid_file = fn;
 495                         }
 496
 497                 } else if (state == DESCRIPTION) {
 498
 499                         /* Try to parse Red Hat style description
 500                          * continuation */
 501
 502                         size_t k = strlen(t);
 503                         char *d;
 504
 505                         if (t[k-1] == '\\')
 506                                 t[k-1] = 0;
 507                         else
 508                                 state = NORMAL;
 509
 510                         assert(u->meta.description);
 511                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 512                                 r = -ENOMEM;
 513                                 goto finish;
 514                         }
 515
 516                         free(u->meta.description);
 517                         u->meta.description = d;
 518
 519                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 520
 521                         if (startswith_no_case(t, "Provides:")) {
 522                                 char *i, *w;
 523                                 size_t z;
 524
 525                                 state = LSB;
 526
 527                                 FOREACH_WORD(w, z, t+9, i) {
 528                                         char *n, *m;
 529
 530                                         if (!(n = strndup(w, z))) {
 531                                                 r = -ENOMEM;
 532                                                 goto finish;
 533                                         }
 534
 535                                         r = sysv_translate_facility(n, &m);
 536                                         free(n);
 537
 538                                         if (r < 0)
 539                                                 goto finish;
 540
 541                                         if (r == 0)
 542                                                 continue;
 543
 544                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 545                                                 r = unit_add_name(u, m);
 546                                         else {
 547                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m, NULL, true)) >= 0)
 548                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 549                                         }
 550
 551                                         free(m);
 552
 553                                         if (r < 0)
 554                                                 goto finish;
 555                                 }
 556
 557                         } else if (startswith_no_case(t, "Required-Start:") ||
 558                                    startswith_no_case(t, "Should-Start:") ||
 559                                    startswith_no_case(t, "X-Start-Before:") ||
 560                                    startswith_no_case(t, "X-Start-After:")) {
 561                                 char *i, *w;
 562                                 size_t z;
 563
 564                                 state = LSB;
 565
 566                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 567                                         char *n, *m;
 568
 569                                         if (!(n = strndup(w, z))) {
 570                                                 r = -ENOMEM;
 571                                                 goto finish;
 572                                         }
 573
 574                                         r = sysv_translate_facility(n, &m);
 575                                         free(n);
 576
 577                                         if (r < 0)
 578                                                 goto finish;
 579
 580                                         if (r == 0)
 581                                                 continue;
 582
 583                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 584                                         free(m);
 585
 586                                         if (r < 0)
 587                                                 goto finish;
 588                                 }
 589                         } else if (startswith_no_case(t, "Default-Start:")) {
 590                                 char *k, *d;
 591
 592                                 state = LSB;
 593
 594                                 k = delete_chars(t+14, WHITESPACE "-");
 595
 596                                 if (k[0] != 0) {
 597                                         if (!(d = strdup(k))) {
 598                                                 r = -ENOMEM;
 599                                                 goto finish;
 600                                         }
 601
 602                                         free(s->sysv_runlevels);
 603                                         s->sysv_runlevels = d;
 604                                 }
 605
 606                         } else if (startswith_no_case(t, "Description:")) {
 607                                 char *d;
 608
 609                                 state = LSB_DESCRIPTION;
 610
 611                                 if (!(d = strdup(strstrip(t+12)))) {
 612                                         r = -ENOMEM;
 613                                         goto finish;
 614                                 }
 615
 616                                 free(u->meta.description);
 617                                 u->meta.description = d;
 618
 619                         } else if (startswith_no_case(t, "Short-Description:") &&
 620                                    !u->meta.description) {
 621                                 char *d;
 622
 623                                 /* We use the short description only
 624                                  * if no long description is set. */
 625
 626                                 state = LSB;
 627
 628                                 if (!(d = strdup(strstrip(t+18)))) {
 629                                         r = -ENOMEM;
 630                                         goto finish;
 631                                 }
 632
 633                                 u->meta.description = d;
 634
 635                         } else if (startswith_no_case(t, "X-Interactive:")) {
 636                                 int b;
 637
 638                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 639                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 640                                         continue;
 641                                 }
 642
 643                                 if (b)
 644                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 645                                 else
 646                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 647
 648                         } else if (state == LSB_DESCRIPTION) {
 649
 650                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 651                                         char *d;
 652
 653                                         assert(u->meta.description);
 654                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 655                                                 r = -ENOMEM;
 656                                                 goto finish;
 657                                         }
 658
 659                                         free(u->meta.description);
 660                                         u->meta.description = d;
 661                                 } else
 662                                         state = LSB;
 663                         }
 664                 }
 665         }
 666
 667         if ((r = sysv_exec_commands(s)) < 0)
 668                 goto finish;
 669
 670         if (!s->sysv_runlevels || chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 671                 /* If there a runlevels configured for this service
 672                  * but none of the standard ones, then we assume this
 673                  * is some special kind of service (which might be
 674                  * needed for early boot) and don't create any links
 675                  * to it. */
 676
 677                 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0 ||
 678                     (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 679                         goto finish;
 680
 681         } else
 682                 /* Don't timeout special services during boot (like fsck) */
 683                 s->timeout_usec = 0;
 684
 685         /* Special setting for all SysV services */
 686         s->type = SERVICE_FORKING;
 687         s->valid_no_process = true;
 688         s->kill_mode = KILL_PROCESS_GROUP;
 689         s->restart = SERVICE_ONCE;
 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, UNIT(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 && UNIT(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 && UNIT(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 ((UNIT(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(UNIT(s)->meta.manager->lookup_paths.sysvinit_path))
 766                 return 0;
 767
 768         if ((t = UNIT(s)->meta.id))
 769                 if ((r = service_load_sysv_name(s, t)) < 0)
 770                         return r;
 771
 772         if (UNIT(s)->meta.load_state == UNIT_STUB)
 773                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 774                         if (t == UNIT(s)->meta.id)
 775                                 continue;
 776
 777                         if ((r == service_load_sysv_name(s, t)) < 0)
 778                                 return r;
 779
 780                         if (UNIT(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 (UNIT(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.", UNIT(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.", UNIT(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.", UNIT(s)->meta.id);
 821                 return -EINVAL;
 822         }
 823
 824         return 0;
 825 }
 826
 827 static int service_load(Unit *u) {
 828         int r;
 829         Service *s = SERVICE(u);
 830
 831         assert(s);
 832
 833         /* Load a .service file */
 834         if ((r = unit_load_fragment(u)) < 0)
 835                 return r;
 836
 837         /* Load a classic init script as a fallback, if we couldn't find anything */
 838         if (u->meta.load_state == UNIT_STUB)
 839                 if ((r = service_load_sysv(s)) < 0)
 840                         return r;
 841
 842         /* Still nothing found? Then let's give up */
 843         if (u->meta.load_state == UNIT_STUB)
 844                 return -ENOENT;
 845
 846         /* We were able to load something, then let's add in the
 847          * dropin directories. */
 848         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 849                 return r;
 850
 851         /* This is a new unit? Then let's add in some extras */
 852         if (u->meta.load_state == UNIT_LOADED) {
 853                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 854                         return r;
 855
 856                 if ((r = unit_add_default_cgroup(u)) < 0)
 857                         return r;
 858
 859                 if ((r = sysv_fix_order(s)) < 0)
 860                         return r;
 861
 862                 if (s->bus_name) {
 863                         if ((r = service_add_bus_name(s)) < 0)
 864                                 return r;
 865
 866                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 867                             return r;
 868                 }
 869
 870                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
 871                         s->notify_access = NOTIFY_MAIN;
 872         }
 873
 874         return service_verify(s);
 875 }
 876
 877 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 878
 879         ServiceExecCommand c;
 880         Service *s = SERVICE(u);
 881         const char *prefix2;
 882         char *p2;
 883
 884         assert(s);
 885
 886         p2 = strappend(prefix, "\t");
 887         prefix2 = p2 ? p2 : prefix;
 888
 889         fprintf(f,
 890                 "%sService State: %s\n"
 891                 "%sPermissionsStartOnly: %s\n"
 892                 "%sRootDirectoryStartOnly: %s\n"
 893                 "%sValidNoProcess: %s\n"
 894                 "%sKillMode: %s\n"
 895                 "%sType: %s\n"
 896                 "%sNotifyAccess: %s\n",
 897                 prefix, service_state_to_string(s->state),
 898                 prefix, yes_no(s->permissions_start_only),
 899                 prefix, yes_no(s->root_directory_start_only),
 900                 prefix, yes_no(s->valid_no_process),
 901                 prefix, kill_mode_to_string(s->kill_mode),
 902                 prefix, service_type_to_string(s->type),
 903                 prefix, notify_access_to_string(s->notify_access));
 904
 905         if (s->control_pid > 0)
 906                 fprintf(f,
 907                         "%sControl PID: %lu\n",
 908                         prefix, (unsigned long) s->control_pid);
 909
 910         if (s->main_pid > 0)
 911                 fprintf(f,
 912                         "%sMain PID: %lu\n",
 913                         prefix, (unsigned long) s->main_pid);
 914
 915         if (s->pid_file)
 916                 fprintf(f,
 917                         "%sPIDFile: %s\n",
 918                         prefix, s->pid_file);
 919
 920         if (s->bus_name)
 921                 fprintf(f,
 922                         "%sBusName: %s\n"
 923                         "%sBus Name Good: %s\n",
 924                         prefix, s->bus_name,
 925                         prefix, yes_no(s->bus_name_good));
 926
 927         exec_context_dump(&s->exec_context, f, prefix);
 928
 929         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 930
 931                 if (!s->exec_command[c])
 932                         continue;
 933
 934                 fprintf(f, "%s-> %s:\n",
 935                         prefix, service_exec_command_to_string(c));
 936
 937                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 938         }
 939
 940         if (s->sysv_path)
 941                 fprintf(f,
 942                         "%sSysV Init Script Path: %s\n"
 943                         "%sSysV Init Script has LSB Header: %s\n",
 944                         prefix, s->sysv_path,
 945                         prefix, yes_no(s->sysv_has_lsb));
 946
 947         if (s->sysv_start_priority >= 0)
 948                 fprintf(f,
 949                         "%sSysVStartPriority: %i\n",
 950                         prefix, s->sysv_start_priority);
 951
 952         if (s->sysv_runlevels)
 953                 fprintf(f, "%sSysVRunLevels: %s\n",
 954                         prefix, s->sysv_runlevels);
 955
 956         if (s->status_text)
 957                 fprintf(f, "%sStatus Text: %s\n",
 958                         prefix, s->status_text);
 959
 960         free(p2);
 961 }
 962
 963 static int service_load_pid_file(Service *s) {
 964         char *k;
 965         int r;
 966         pid_t pid;
 967
 968         assert(s);
 969
 970         if (s->main_pid_known)
 971                 return 0;
 972
 973         assert(s->main_pid <= 0);
 974
 975         if (!s->pid_file)
 976                 return -ENOENT;
 977
 978         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 979                 return r;
 980
 981         r = parse_pid(k, &pid);
 982         free(k);
 983
 984         if (r < 0)
 985                 return r;
 986
 987         if (kill(pid, 0) < 0 && errno != EPERM) {
 988                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
 989                             (unsigned long) pid, s->pid_file);
 990                 return -ESRCH;
 991         }
 992
 993         if ((r = service_set_main_pid(s, pid)) < 0)
 994                 return r;
 995
 996         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 997                 /* FIXME: we need to do something here */
 998                 return r;
 999
1000         return 0;
1001 }
1002
1003 static int service_get_sockets(Service *s, Set **_set) {
1004         Set *set;
1005         Iterator i;
1006         char *t;
1007         int r;
1008
1009         assert(s);
1010         assert(_set);
1011
1012         if (s->socket_fd >= 0)
1013                 return 0;
1014
1015         /* Collects all Socket objects that belong to this
1016          * service. Note that a service might have multiple sockets
1017          * via multiple names. */
1018
1019         if (!(set = set_new(NULL, NULL)))
1020                 return -ENOMEM;
1021
1022         SET_FOREACH(t, UNIT(s)->meta.names, i) {
1023                 char *k;
1024                 Unit *p;
1025
1026                 /* Look for all socket objects that go by any of our
1027                  * units and collect their fds */
1028
1029                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1030                         r = -ENOMEM;
1031                         goto fail;
1032                 }
1033
1034                 p = manager_get_unit(UNIT(s)->meta.manager, k);
1035                 free(k);
1036
1037                 if (!p)
1038                         continue;
1039
1040                 if ((r = set_put(set, p)) < 0)
1041                         goto fail;
1042         }
1043
1044         *_set = set;
1045         return 0;
1046
1047 fail:
1048         set_free(set);
1049         return r;
1050 }
1051
1052 static int service_notify_sockets_dead(Service *s) {
1053         Iterator i;
1054         Set *set;
1055         Socket *sock;
1056         int r;
1057
1058         assert(s);
1059
1060         if (s->socket_fd >= 0)
1061                 return 0;
1062
1063         /* Notifies all our sockets when we die */
1064         if ((r = service_get_sockets(s, &set)) < 0)
1065                 return r;
1066
1067         SET_FOREACH(sock, set, i)
1068                 socket_notify_service_dead(sock);
1069
1070         set_free(set);
1071
1072         return 0;
1073 }
1074
1075 static void service_set_state(Service *s, ServiceState state) {
1076         ServiceState old_state;
1077         assert(s);
1078
1079         old_state = s->state;
1080         s->state = state;
1081
1082         if (state != SERVICE_START_PRE &&
1083             state != SERVICE_START &&
1084             state != SERVICE_START_POST &&
1085             state != SERVICE_RELOAD &&
1086             state != SERVICE_STOP &&
1087             state != SERVICE_STOP_SIGTERM &&
1088             state != SERVICE_STOP_SIGKILL &&
1089             state != SERVICE_STOP_POST &&
1090             state != SERVICE_FINAL_SIGTERM &&
1091             state != SERVICE_FINAL_SIGKILL &&
1092             state != SERVICE_AUTO_RESTART)
1093                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1094
1095         if (state != SERVICE_START &&
1096             state != SERVICE_START_POST &&
1097             state != SERVICE_RUNNING &&
1098             state != SERVICE_RELOAD &&
1099             state != SERVICE_STOP &&
1100             state != SERVICE_STOP_SIGTERM &&
1101             state != SERVICE_STOP_SIGKILL)
1102                 service_unwatch_main_pid(s);
1103
1104         if (state != SERVICE_START_PRE &&
1105             state != SERVICE_START &&
1106             state != SERVICE_START_POST &&
1107             state != SERVICE_RELOAD &&
1108             state != SERVICE_STOP &&
1109             state != SERVICE_STOP_SIGTERM &&
1110             state != SERVICE_STOP_SIGKILL &&
1111             state != SERVICE_STOP_POST &&
1112             state != SERVICE_FINAL_SIGTERM &&
1113             state != SERVICE_FINAL_SIGKILL) {
1114                 service_unwatch_control_pid(s);
1115                 s->control_command = NULL;
1116                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1117         }
1118
1119         if (state == SERVICE_DEAD ||
1120             state == SERVICE_STOP ||
1121             state == SERVICE_STOP_SIGTERM ||
1122             state == SERVICE_STOP_SIGKILL ||
1123             state == SERVICE_STOP_POST ||
1124             state == SERVICE_FINAL_SIGTERM ||
1125             state == SERVICE_FINAL_SIGKILL ||
1126             state == SERVICE_MAINTENANCE ||
1127             state == SERVICE_AUTO_RESTART)
1128                 service_notify_sockets_dead(s);
1129
1130         if (state != SERVICE_START_PRE &&
1131             state != SERVICE_START &&
1132             state != SERVICE_START_POST &&
1133             state != SERVICE_RUNNING &&
1134             state != SERVICE_RELOAD &&
1135             state != SERVICE_STOP &&
1136             state != SERVICE_STOP_SIGTERM &&
1137             state != SERVICE_STOP_SIGKILL &&
1138             state != SERVICE_STOP_POST &&
1139             state != SERVICE_FINAL_SIGTERM &&
1140             state != SERVICE_FINAL_SIGKILL &&
1141             !(state == SERVICE_DEAD && UNIT(s)->meta.job)) {
1142                 service_close_socket_fd(s);
1143                 service_connection_unref(s);
1144         }
1145
1146         if (old_state != state)
1147                 log_debug("%s changed %s -> %s", UNIT(s)->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1148
1149         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1150 }
1151
1152 static int service_coldplug(Unit *u) {
1153         Service *s = SERVICE(u);
1154         int r;
1155
1156         assert(s);
1157         assert(s->state == SERVICE_DEAD);
1158
1159         if (s->deserialized_state != s->state) {
1160
1161                 if (s->deserialized_state == SERVICE_START_PRE ||
1162                     s->deserialized_state == SERVICE_START ||
1163                     s->deserialized_state == SERVICE_START_POST ||
1164                     s->deserialized_state == SERVICE_RELOAD ||
1165                     s->deserialized_state == SERVICE_STOP ||
1166                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1167                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1168                     s->deserialized_state == SERVICE_STOP_POST ||
1169                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1170                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1171                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1172
1173                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1174                                 usec_t k;
1175
1176                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1177
1178                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1179                                         return r;
1180                         }
1181                 }
1182
1183                 if ((s->deserialized_state == SERVICE_START &&
1184                      (s->type == SERVICE_FORKING ||
1185                       s->type == SERVICE_DBUS ||
1186                       s->type == SERVICE_FINISH ||
1187                       s->type == SERVICE_NOTIFY)) ||
1188                     s->deserialized_state == SERVICE_START_POST ||
1189                     s->deserialized_state == SERVICE_RUNNING ||
1190                     s->deserialized_state == SERVICE_RELOAD ||
1191                     s->deserialized_state == SERVICE_STOP ||
1192                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1193                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1194                         if (s->main_pid > 0)
1195                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1196                                         return r;
1197
1198                 if (s->deserialized_state == SERVICE_START_PRE ||
1199                     s->deserialized_state == SERVICE_START ||
1200                     s->deserialized_state == SERVICE_START_POST ||
1201                     s->deserialized_state == SERVICE_RELOAD ||
1202                     s->deserialized_state == SERVICE_STOP ||
1203                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1204                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1205                     s->deserialized_state == SERVICE_STOP_POST ||
1206                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1207                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1208                         if (s->control_pid > 0)
1209                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1210                                         return r;
1211
1212                 service_set_state(s, s->deserialized_state);
1213         }
1214
1215         return 0;
1216 }
1217
1218 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1219         Iterator i;
1220         int r;
1221         int *rfds = NULL;
1222         unsigned rn_fds = 0;
1223         Set *set;
1224         Socket *sock;
1225
1226         assert(s);
1227         assert(fds);
1228         assert(n_fds);
1229
1230         if (s->socket_fd >= 0)
1231                 return 0;
1232
1233         if ((r = service_get_sockets(s, &set)) < 0)
1234                 return r;
1235
1236         SET_FOREACH(sock, set, i) {
1237                 int *cfds;
1238                 unsigned cn_fds;
1239
1240                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1241                         goto fail;
1242
1243                 if (!cfds)
1244                         continue;
1245
1246                 if (!rfds) {
1247                         rfds = cfds;
1248                         rn_fds = cn_fds;
1249                 } else {
1250                         int *t;
1251
1252                         if (!(t = new(int, rn_fds+cn_fds))) {
1253                                 free(cfds);
1254                                 r = -ENOMEM;
1255                                 goto fail;
1256                         }
1257
1258                         memcpy(t, rfds, rn_fds);
1259                         memcpy(t+rn_fds, cfds, cn_fds);
1260                         free(rfds);
1261                         free(cfds);
1262
1263                         rfds = t;
1264                         rn_fds = rn_fds+cn_fds;
1265                 }
1266         }
1267
1268         *fds = rfds;
1269         *n_fds = rn_fds;
1270
1271         set_free(set);
1272
1273         return 0;
1274
1275 fail:
1276         set_free(set);
1277         free(rfds);
1278
1279         return r;
1280 }
1281
1282 static int service_spawn(
1283                 Service *s,
1284                 ExecCommand *c,
1285                 bool timeout,
1286                 bool pass_fds,
1287                 bool apply_permissions,
1288                 bool apply_chroot,
1289                 bool set_notify_socket,
1290                 pid_t *_pid) {
1291
1292         pid_t pid;
1293         int r;
1294         int *fds = NULL, *fdsbuf = NULL;
1295         unsigned n_fds = 0;
1296         char **argv = NULL, **env = NULL;
1297
1298         assert(s);
1299         assert(c);
1300         assert(_pid);
1301
1302         if (pass_fds ||
1303             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1304             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1305             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1306
1307                 if (s->socket_fd >= 0) {
1308                         fds = &s->socket_fd;
1309                         n_fds = 1;
1310                 } else {
1311                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1312                                 goto fail;
1313
1314                         fds = fdsbuf;
1315                 }
1316         }
1317
1318         if (timeout && s->timeout_usec) {
1319                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1320                         goto fail;
1321         } else
1322                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1323
1324         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1325                 r = -ENOMEM;
1326                 goto fail;
1327         }
1328
1329         if (set_notify_socket) {
1330                 char *t;
1331
1332                 if (asprintf(&t, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1333                         r = -ENOMEM;
1334                         goto fail;
1335                 }
1336
1337                 env = strv_env_set(s->meta.manager->environment, t);
1338                 free(t);
1339
1340                 if (!env) {
1341                         r = -ENOMEM;
1342                         goto fail;
1343                 }
1344         } else
1345                 env = s->meta.manager->environment;
1346
1347         r = exec_spawn(c,
1348                        argv,
1349                        &s->exec_context,
1350                        fds, n_fds,
1351                        env,
1352                        apply_permissions,
1353                        apply_chroot,
1354                        UNIT(s)->meta.manager->confirm_spawn,
1355                        UNIT(s)->meta.cgroup_bondings,
1356                        &pid);
1357
1358         strv_free(argv);
1359         argv = NULL;
1360
1361         if (set_notify_socket)
1362                 strv_free(env);
1363         env = NULL;
1364
1365         if (r < 0)
1366                 goto fail;
1367
1368         if (fdsbuf)
1369                 free(fdsbuf);
1370
1371         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1372                 /* FIXME: we need to do something here */
1373                 goto fail;
1374
1375         *_pid = pid;
1376
1377         return 0;
1378
1379 fail:
1380         free(fds);
1381
1382         strv_free(argv);
1383
1384         if (set_notify_socket)
1385                 strv_free(env);
1386
1387         if (timeout)
1388                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1389
1390         return r;
1391 }
1392
1393 static int main_pid_good(Service *s) {
1394         assert(s);
1395
1396         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1397          * don't know */
1398
1399         /* If we know the pid file, then lets just check if it is
1400          * still valid */
1401         if (s->main_pid_known)
1402                 return s->main_pid > 0;
1403
1404         /* We don't know the pid */
1405         return -EAGAIN;
1406 }
1407
1408 static int control_pid_good(Service *s) {
1409         assert(s);
1410
1411         return s->control_pid > 0;
1412 }
1413
1414 static int cgroup_good(Service *s) {
1415         int r;
1416
1417         assert(s);
1418
1419         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1420                 return r;
1421
1422         return !r;
1423 }
1424
1425 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1426         int r;
1427         assert(s);
1428
1429         if (!success)
1430                 s->failure = true;
1431
1432         if (allow_restart &&
1433             s->allow_restart &&
1434             (s->restart == SERVICE_RESTART_ALWAYS ||
1435              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1436
1437                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1438                         goto fail;
1439
1440                 service_set_state(s, SERVICE_AUTO_RESTART);
1441         } else
1442                 service_set_state(s, s->failure ? SERVICE_MAINTENANCE : SERVICE_DEAD);
1443
1444         return;
1445
1446 fail:
1447         log_warning("%s failed to run install restart timer: %s", UNIT(s)->meta.id, strerror(-r));
1448         service_enter_dead(s, false, false);
1449 }
1450
1451 static void service_enter_signal(Service *s, ServiceState state, bool success);
1452
1453 static void service_enter_stop_post(Service *s, bool success) {
1454         int r;
1455         assert(s);
1456
1457         if (!success)
1458                 s->failure = true;
1459
1460         service_unwatch_control_pid(s);
1461
1462         s->control_command_id = SERVICE_EXEC_STOP_POST;
1463         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1464                 if ((r = service_spawn(s,
1465                                        s->control_command,
1466                                        true,
1467                                        false,
1468                                        !s->permissions_start_only,
1469                                        !s->root_directory_start_only,
1470                                        false,
1471                                        &s->control_pid)) < 0)
1472                         goto fail;
1473
1474
1475                 service_set_state(s, SERVICE_STOP_POST);
1476         } else
1477                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1478
1479         return;
1480
1481 fail:
1482         log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->meta.id, strerror(-r));
1483         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1484 }
1485
1486 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1487         int r;
1488         bool sent = false;
1489
1490         assert(s);
1491
1492         if (!success)
1493                 s->failure = true;
1494
1495         if (s->kill_mode != KILL_NONE) {
1496                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1497
1498                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1499
1500                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1501                                 if (r != -EAGAIN && r != -ESRCH)
1502                                         goto fail;
1503                         } else
1504                                 sent = true;
1505                 }
1506
1507                 if (!sent) {
1508                         r = 0;
1509
1510                         if (s->main_pid > 0) {
1511                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1512                                         r = -errno;
1513                                 else
1514                                         sent = true;
1515                         }
1516
1517                         if (s->control_pid > 0) {
1518                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1519                                         r = -errno;
1520                                 else
1521                                         sent = true;
1522                         }
1523
1524                         if (r < 0)
1525                                 goto fail;
1526                 }
1527         }
1528
1529         if (sent && (s->main_pid > 0 || s->control_pid > 0)) {
1530                 if (s->timeout_usec > 0)
1531                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1532                                 goto fail;
1533
1534                 service_set_state(s, state);
1535         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1536                 service_enter_stop_post(s, true);
1537         else
1538                 service_enter_dead(s, true, true);
1539
1540         return;
1541
1542 fail:
1543         log_warning("%s failed to kill processes: %s", UNIT(s)->meta.id, strerror(-r));
1544
1545         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1546                 service_enter_stop_post(s, false);
1547         else
1548                 service_enter_dead(s, false, true);
1549 }
1550
1551 static void service_enter_stop(Service *s, bool success) {
1552         int r;
1553
1554         assert(s);
1555
1556         if (!success)
1557                 s->failure = true;
1558
1559         service_unwatch_control_pid(s);
1560
1561         s->control_command_id = SERVICE_EXEC_STOP;
1562         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1563                 if ((r = service_spawn(s,
1564                                        s->control_command,
1565                                        true,
1566                                        false,
1567                                        !s->permissions_start_only,
1568                                        !s->root_directory_start_only,
1569                                        false,
1570                                        &s->control_pid)) < 0)
1571                         goto fail;
1572
1573                 service_set_state(s, SERVICE_STOP);
1574         } else
1575                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1576
1577         return;
1578
1579 fail:
1580         log_warning("%s failed to run 'stop' task: %s", UNIT(s)->meta.id, strerror(-r));
1581         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1582 }
1583
1584 static void service_enter_running(Service *s, bool success) {
1585         assert(s);
1586
1587         if (!success)
1588                 s->failure = true;
1589
1590         if (main_pid_good(s) != 0 &&
1591             cgroup_good(s) != 0 &&
1592             (s->bus_name_good || s->type != SERVICE_DBUS))
1593                 service_set_state(s, SERVICE_RUNNING);
1594         else if (s->valid_no_process)
1595                 service_set_state(s, SERVICE_EXITED);
1596         else
1597                 service_enter_stop(s, true);
1598 }
1599
1600 static void service_enter_start_post(Service *s) {
1601         int r;
1602         assert(s);
1603
1604         service_unwatch_control_pid(s);
1605
1606         s->control_command_id = SERVICE_EXEC_START_POST;
1607         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1608                 if ((r = service_spawn(s,
1609                                        s->control_command,
1610                                        true,
1611                                        false,
1612                                        !s->permissions_start_only,
1613                                        !s->root_directory_start_only,
1614                                        false,
1615                                        &s->control_pid)) < 0)
1616                         goto fail;
1617
1618                 service_set_state(s, SERVICE_START_POST);
1619         } else
1620                 service_enter_running(s, true);
1621
1622         return;
1623
1624 fail:
1625         log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->meta.id, strerror(-r));
1626         service_enter_stop(s, false);
1627 }
1628
1629 static void service_enter_start(Service *s) {
1630         pid_t pid;
1631         int r;
1632
1633         assert(s);
1634
1635         assert(s->exec_command[SERVICE_EXEC_START]);
1636         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1637
1638         if (s->type == SERVICE_FORKING)
1639                 service_unwatch_control_pid(s);
1640         else
1641                 service_unwatch_main_pid(s);
1642
1643         if ((r = service_spawn(s,
1644                                s->exec_command[SERVICE_EXEC_START],
1645                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1646                                true,
1647                                true,
1648                                true,
1649                                s->notify_access != NOTIFY_NONE,
1650                                &pid)) < 0)
1651                 goto fail;
1652
1653         if (s->type == SERVICE_SIMPLE) {
1654                 /* For simple services we immediately start
1655                  * the START_POST binaries. */
1656
1657                 service_set_main_pid(s, pid);
1658                 service_enter_start_post(s);
1659
1660         } else  if (s->type == SERVICE_FORKING) {
1661
1662                 /* For forking services we wait until the start
1663                  * process exited. */
1664
1665                 s->control_command_id = SERVICE_EXEC_START;
1666                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1667
1668                 s->control_pid = pid;
1669                 service_set_state(s, SERVICE_START);
1670
1671         } else if (s->type == SERVICE_FINISH ||
1672                    s->type == SERVICE_DBUS ||
1673                    s->type == SERVICE_NOTIFY) {
1674
1675                 /* For finishing services we wait until the start
1676                  * process exited, too, but it is our main process. */
1677
1678                 /* For D-Bus services we know the main pid right away,
1679                  * but wait for the bus name to appear on the
1680                  * bus. Notify services are similar. */
1681
1682                 service_set_main_pid(s, pid);
1683                 service_set_state(s, SERVICE_START);
1684         } else
1685                 assert_not_reached("Unknown service type");
1686
1687         return;
1688
1689 fail:
1690         log_warning("%s failed to run 'start' task: %s", UNIT(s)->meta.id, strerror(-r));
1691         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1692 }
1693
1694 static void service_enter_start_pre(Service *s) {
1695         int r;
1696
1697         assert(s);
1698
1699         service_unwatch_control_pid(s);
1700
1701         s->control_command_id = SERVICE_EXEC_START_PRE;
1702         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1703                 if ((r = service_spawn(s,
1704                                        s->control_command,
1705                                        true,
1706                                        false,
1707                                        !s->permissions_start_only,
1708                                        !s->root_directory_start_only,
1709                                        false,
1710                                        &s->control_pid)) < 0)
1711                         goto fail;
1712
1713                 service_set_state(s, SERVICE_START_PRE);
1714         } else
1715                 service_enter_start(s);
1716
1717         return;
1718
1719 fail:
1720         log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->meta.id, strerror(-r));
1721         service_enter_dead(s, false, true);
1722 }
1723
1724 static void service_enter_restart(Service *s) {
1725         int r;
1726         assert(s);
1727
1728         service_enter_dead(s, true, false);
1729
1730         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1731                 goto fail;
1732
1733         log_debug("%s scheduled restart job.", UNIT(s)->meta.id);
1734         return;
1735
1736 fail:
1737
1738         log_warning("%s failed to schedule restart job: %s", UNIT(s)->meta.id, strerror(-r));
1739         service_enter_dead(s, false, false);
1740 }
1741
1742 static void service_enter_reload(Service *s) {
1743         int r;
1744
1745         assert(s);
1746
1747         service_unwatch_control_pid(s);
1748
1749         s->control_command_id = SERVICE_EXEC_RELOAD;
1750         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1751                 if ((r = service_spawn(s,
1752                                        s->control_command,
1753                                        true,
1754                                        false,
1755                                        !s->permissions_start_only,
1756                                        !s->root_directory_start_only,
1757                                        false,
1758                                        &s->control_pid)) < 0)
1759                         goto fail;
1760
1761                 service_set_state(s, SERVICE_RELOAD);
1762         } else
1763                 service_enter_running(s, true);
1764
1765         return;
1766
1767 fail:
1768         log_warning("%s failed to run 'reload' task: %s", UNIT(s)->meta.id, strerror(-r));
1769         service_enter_stop(s, false);
1770 }
1771
1772 static void service_run_next(Service *s, bool success) {
1773         int r;
1774
1775         assert(s);
1776         assert(s->control_command);
1777         assert(s->control_command->command_next);
1778
1779         if (!success)
1780                 s->failure = true;
1781
1782         s->control_command = s->control_command->command_next;
1783
1784         service_unwatch_control_pid(s);
1785
1786         if ((r = service_spawn(s,
1787                                s->control_command,
1788                                true,
1789                                false,
1790                                !s->permissions_start_only,
1791                                !s->root_directory_start_only,
1792                                false,
1793                                &s->control_pid)) < 0)
1794                 goto fail;
1795
1796         return;
1797
1798 fail:
1799         log_warning("%s failed to run next task: %s", UNIT(s)->meta.id, strerror(-r));
1800
1801         if (s->state == SERVICE_START_PRE)
1802                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1803         else if (s->state == SERVICE_STOP)
1804                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1805         else if (s->state == SERVICE_STOP_POST)
1806                 service_enter_dead(s, false, true);
1807         else
1808                 service_enter_stop(s, false);
1809 }
1810
1811 static int service_start(Unit *u) {
1812         Service *s = SERVICE(u);
1813
1814         assert(s);
1815
1816         /* We cannot fulfill this request right now, try again later
1817          * please! */
1818         if (s->state == SERVICE_STOP ||
1819             s->state == SERVICE_STOP_SIGTERM ||
1820             s->state == SERVICE_STOP_SIGKILL ||
1821             s->state == SERVICE_STOP_POST ||
1822             s->state == SERVICE_FINAL_SIGTERM ||
1823             s->state == SERVICE_FINAL_SIGKILL)
1824                 return -EAGAIN;
1825
1826         /* Already on it! */
1827         if (s->state == SERVICE_START_PRE ||
1828             s->state == SERVICE_START ||
1829             s->state == SERVICE_START_POST)
1830                 return 0;
1831
1832         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTENANCE || s->state == SERVICE_AUTO_RESTART);
1833
1834         /* Make sure we don't enter a busy loop of some kind. */
1835         if (!ratelimit_test(&s->ratelimit)) {
1836                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1837                 return -ECANCELED;
1838         }
1839
1840         s->failure = false;
1841         s->main_pid_known = false;
1842         s->allow_restart = true;
1843
1844         service_enter_start_pre(s);
1845         return 0;
1846 }
1847
1848 static int service_stop(Unit *u) {
1849         Service *s = SERVICE(u);
1850
1851         assert(s);
1852
1853         /* Cannot do this now */
1854         if (s->state == SERVICE_START_PRE ||
1855             s->state == SERVICE_START ||
1856             s->state == SERVICE_START_POST ||
1857             s->state == SERVICE_RELOAD)
1858                 return -EAGAIN;
1859
1860         /* Already on it */
1861         if (s->state == SERVICE_STOP ||
1862             s->state == SERVICE_STOP_SIGTERM ||
1863             s->state == SERVICE_STOP_SIGKILL ||
1864             s->state == SERVICE_STOP_POST ||
1865             s->state == SERVICE_FINAL_SIGTERM ||
1866             s->state == SERVICE_FINAL_SIGKILL)
1867                 return 0;
1868
1869         if (s->state == SERVICE_AUTO_RESTART) {
1870                 service_set_state(s, SERVICE_DEAD);
1871                 return 0;
1872         }
1873
1874         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1875
1876         /* This is a user request, so don't do restarts on this
1877          * shutdown. */
1878         s->allow_restart = false;
1879
1880         service_enter_stop(s, true);
1881         return 0;
1882 }
1883
1884 static int service_reload(Unit *u) {
1885         Service *s = SERVICE(u);
1886
1887         assert(s);
1888
1889         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1890
1891         service_enter_reload(s);
1892         return 0;
1893 }
1894
1895 static bool service_can_reload(Unit *u) {
1896         Service *s = SERVICE(u);
1897
1898         assert(s);
1899
1900         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1901 }
1902
1903 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1904         Service *s = SERVICE(u);
1905
1906         assert(u);
1907         assert(f);
1908         assert(fds);
1909
1910         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1911         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1912
1913         if (s->control_pid > 0)
1914                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1915
1916         if (s->main_pid_known && s->main_pid > 0)
1917                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
1918
1919         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1920
1921         /* There's a minor uncleanliness here: if there are multiple
1922          * commands attached here, we will start from the first one
1923          * again */
1924         if (s->control_command_id >= 0)
1925                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
1926
1927         if (s->socket_fd >= 0) {
1928                 int copy;
1929
1930                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1931                         return copy;
1932
1933                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1934         }
1935
1936         return 0;
1937 }
1938
1939 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1940         Service *s = SERVICE(u);
1941         int r;
1942
1943         assert(u);
1944         assert(key);
1945         assert(value);
1946         assert(fds);
1947
1948         if (streq(key, "state")) {
1949                 ServiceState state;
1950
1951                 if ((state = service_state_from_string(value)) < 0)
1952                         log_debug("Failed to parse state value %s", value);
1953                 else
1954                         s->deserialized_state = state;
1955         } else if (streq(key, "failure")) {
1956                 int b;
1957
1958                 if ((b = parse_boolean(value)) < 0)
1959                         log_debug("Failed to parse failure value %s", value);
1960                 else
1961                         s->failure = b || s->failure;
1962         } else if (streq(key, "control-pid")) {
1963                 pid_t pid;
1964
1965                 if ((r = parse_pid(value, &pid)) < 0)
1966                         log_debug("Failed to parse control-pid value %s", value);
1967                 else
1968                         s->control_pid = pid;
1969         } else if (streq(key, "main-pid")) {
1970                 pid_t pid;
1971
1972                 if ((r = parse_pid(value, &pid)) < 0)
1973                         log_debug("Failed to parse main-pid value %s", value);
1974                 else
1975                         service_set_main_pid(s, (pid_t) pid);
1976         } else if (streq(key, "main-pid-known")) {
1977                 int b;
1978
1979                 if ((b = parse_boolean(value)) < 0)
1980                         log_debug("Failed to parse main-pid-known value %s", value);
1981                 else
1982                         s->main_pid_known = b;
1983         } else if (streq(key, "control-command")) {
1984                 ServiceExecCommand id;
1985
1986                 if ((id = service_exec_command_from_string(value)) < 0)
1987                         log_debug("Failed to parse exec-command value %s", value);
1988                 else {
1989                         s->control_command_id = id;
1990                         s->control_command = s->exec_command[id];
1991                 }
1992         } else if (streq(key, "socket-fd")) {
1993                 int fd;
1994
1995                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1996                         log_debug("Failed to parse socket-fd value %s", value);
1997                 else {
1998
1999                         if (s->socket_fd >= 0)
2000                                 close_nointr_nofail(s->socket_fd);
2001                         s->socket_fd = fdset_remove(fds, fd);
2002                 }
2003         } else
2004                 log_debug("Unknown serialization key '%s'", key);
2005
2006         return 0;
2007 }
2008
2009 static UnitActiveState service_active_state(Unit *u) {
2010         assert(u);
2011
2012         return state_translation_table[SERVICE(u)->state];
2013 }
2014
2015 static const char *service_sub_state_to_string(Unit *u) {
2016         assert(u);
2017
2018         return service_state_to_string(SERVICE(u)->state);
2019 }
2020
2021 static bool service_check_gc(Unit *u) {
2022         Service *s = SERVICE(u);
2023
2024         assert(s);
2025
2026         return !!s->sysv_path;
2027 }
2028
2029 static bool service_check_snapshot(Unit *u) {
2030         Service *s = SERVICE(u);
2031
2032         assert(s);
2033
2034         return !s->got_socket_fd;
2035 }
2036
2037 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2038         Service *s = SERVICE(u);
2039         bool success;
2040
2041         assert(s);
2042         assert(pid >= 0);
2043
2044         success = is_clean_exit(code, status);
2045         s->failure = s->failure || !success;
2046
2047         if (s->main_pid == pid) {
2048
2049                 exec_status_fill(&s->main_exec_status, pid, code, status);
2050                 s->main_pid = 0;
2051
2052                 if (s->type != SERVICE_FORKING) {
2053                         assert(s->exec_command[SERVICE_EXEC_START]);
2054                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
2055                 }
2056
2057                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2058
2059                 /* The service exited, so the service is officially
2060                  * gone. */
2061
2062                 switch (s->state) {
2063
2064                 case SERVICE_START_POST:
2065                 case SERVICE_RELOAD:
2066                 case SERVICE_STOP:
2067                         /* Need to wait until the operation is
2068                          * done */
2069                         break;
2070
2071                 case SERVICE_START:
2072                         if (s->type == SERVICE_FINISH) {
2073                                 /* This was our main goal, so let's go on */
2074                                 if (success)
2075                                         service_enter_start_post(s);
2076                                 else
2077                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2078                                 break;
2079                         } else {
2080                                 assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2081
2082                                 /* Fall through */
2083                         }
2084
2085                 case SERVICE_RUNNING:
2086                         service_enter_running(s, success);
2087                         break;
2088
2089                 case SERVICE_STOP_SIGTERM:
2090                 case SERVICE_STOP_SIGKILL:
2091
2092                         if (!control_pid_good(s))
2093                                 service_enter_stop_post(s, success);
2094
2095                         /* If there is still a control process, wait for that first */
2096                         break;
2097
2098                 default:
2099                         assert_not_reached("Uh, main process died at wrong time.");
2100                 }
2101
2102         } else if (s->control_pid == pid) {
2103
2104                 if (s->control_command)
2105                         exec_status_fill(&s->control_command->exec_status, pid, code, status);
2106
2107                 s->control_pid = 0;
2108
2109                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2110
2111                 /* If we are shutting things down anyway we
2112                  * don't care about failing commands. */
2113
2114                 if (s->control_command && s->control_command->command_next && success) {
2115
2116                         /* There is another command to *
2117                          * execute, so let's do that. */
2118
2119                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
2120                         service_run_next(s, success);
2121
2122                 } else {
2123                         /* No further commands for this step, so let's
2124                          * figure out what to do next */
2125
2126                         s->control_command = NULL;
2127                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2128
2129                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2130
2131                         switch (s->state) {
2132
2133                         case SERVICE_START_PRE:
2134                                 if (success)
2135                                         service_enter_start(s);
2136                                 else
2137                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2138                                 break;
2139
2140                         case SERVICE_START:
2141                                 assert(s->type == SERVICE_FORKING);
2142
2143                                 /* Let's try to load the pid
2144                                  * file here if we can. We
2145                                  * ignore the return value,
2146                                  * since the PID file might
2147                                  * actually be created by a
2148                                  * START_POST script */
2149
2150                                 if (success) {
2151                                         if (s->pid_file)
2152                                                 service_load_pid_file(s);
2153
2154                                         service_enter_start_post(s);
2155                                 } else
2156                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2157
2158                                 break;
2159
2160                         case SERVICE_START_POST:
2161                                 if (success && s->pid_file && !s->main_pid_known) {
2162                                         int r;
2163
2164                                         /* Hmm, let's see if we can
2165                                          * load the pid now after the
2166                                          * start-post scripts got
2167                                          * executed. */
2168
2169                                         if ((r = service_load_pid_file(s)) < 0)
2170                                                 log_warning("%s: failed to load PID file %s: %s", UNIT(s)->meta.id, s->pid_file, strerror(-r));
2171                                 }
2172
2173                                 /* Fall through */
2174
2175                         case SERVICE_RELOAD:
2176                                 if (success)
2177                                         service_enter_running(s, true);
2178                                 else
2179                                         service_enter_stop(s, false);
2180
2181                                 break;
2182
2183                         case SERVICE_STOP:
2184                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2185                                 break;
2186
2187                         case SERVICE_STOP_SIGTERM:
2188                         case SERVICE_STOP_SIGKILL:
2189                                 if (main_pid_good(s) <= 0)
2190                                         service_enter_stop_post(s, success);
2191
2192                                 /* If there is still a service
2193                                  * process around, wait until
2194                                  * that one quit, too */
2195                                 break;
2196
2197                         case SERVICE_STOP_POST:
2198                         case SERVICE_FINAL_SIGTERM:
2199                         case SERVICE_FINAL_SIGKILL:
2200                                 service_enter_dead(s, success, true);
2201                                 break;
2202
2203                         default:
2204                                 assert_not_reached("Uh, control process died at wrong time.");
2205                         }
2206                 }
2207         }
2208 }
2209
2210 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2211         Service *s = SERVICE(u);
2212
2213         assert(s);
2214         assert(elapsed == 1);
2215
2216         assert(w == &s->timer_watch);
2217
2218         switch (s->state) {
2219
2220         case SERVICE_START_PRE:
2221         case SERVICE_START:
2222                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2223                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2224                 break;
2225
2226         case SERVICE_START_POST:
2227         case SERVICE_RELOAD:
2228                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2229                 service_enter_stop(s, false);
2230                 break;
2231
2232         case SERVICE_STOP:
2233                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2234                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2235                 break;
2236
2237         case SERVICE_STOP_SIGTERM:
2238                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2239                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2240                 break;
2241
2242         case SERVICE_STOP_SIGKILL:
2243                 /* Uh, wie sent a SIGKILL and it is still not gone?
2244                  * Must be something we cannot kill, so let's just be
2245                  * weirded out and continue */
2246
2247                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2248                 service_enter_stop_post(s, false);
2249                 break;
2250
2251         case SERVICE_STOP_POST:
2252                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2253                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2254                 break;
2255
2256         case SERVICE_FINAL_SIGTERM:
2257                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2258                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2259                 break;
2260
2261         case SERVICE_FINAL_SIGKILL:
2262                 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
2263                 service_enter_dead(s, false, true);
2264                 break;
2265
2266         case SERVICE_AUTO_RESTART:
2267                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2268                 service_enter_restart(s);
2269                 break;
2270
2271         default:
2272                 assert_not_reached("Timeout at wrong time.");
2273         }
2274 }
2275
2276 static void service_cgroup_notify_event(Unit *u) {
2277         Service *s = SERVICE(u);
2278
2279         assert(u);
2280
2281         log_debug("%s: cgroup is empty", u->meta.id);
2282
2283         switch (s->state) {
2284
2285                 /* Waiting for SIGCHLD is usually more interesting,
2286                  * because it includes return codes/signals. Which is
2287                  * why we ignore the cgroup events for most cases,
2288                  * except when we don't know pid which to expect the
2289                  * SIGCHLD for. */
2290
2291         case SERVICE_RUNNING:
2292                 service_enter_running(s, true);
2293                 break;
2294
2295         default:
2296                 ;
2297         }
2298 }
2299
2300 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2301         Service *s = SERVICE(u);
2302         const char *e;
2303
2304         assert(u);
2305
2306         if (s->notify_access == NOTIFY_NONE) {
2307                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2308                             u->meta.id, (unsigned long) pid);
2309                 return;
2310         }
2311
2312         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2313                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2314                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2315                 return;
2316         }
2317
2318         log_debug("%s: Got message", u->meta.id);
2319
2320         /* Interpret MAINPID= */
2321         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2322             (s->state == SERVICE_START ||
2323              s->state == SERVICE_START_POST ||
2324              s->state == SERVICE_RUNNING ||
2325              s->state == SERVICE_RELOAD)) {
2326
2327                 if (parse_pid(e + 8, &pid) < 0)
2328                         log_warning("Failed to parse %s", e);
2329                 else {
2330                         log_debug("%s: got %s", u->meta.id, e);
2331                         service_set_main_pid(s, pid);
2332                 }
2333         }
2334
2335         /* Interpret READY= */
2336         if (s->type == SERVICE_NOTIFY &&
2337             s->state == SERVICE_START &&
2338             strv_find(tags, "READY=1")) {
2339                 log_debug("%s: got READY=1", u->meta.id);
2340
2341                 service_enter_start_post(s);
2342         }
2343
2344         /* Interpret STATUS= */
2345         if ((e = strv_find_prefix(tags, "STATUS="))) {
2346                 char *t;
2347
2348                 if (!(t = strdup(e+7))) {
2349                         log_error("Failed to allocate string.");
2350                         return;
2351                 }
2352
2353                 log_debug("%s: got %s", u->meta.id, e);
2354
2355                 free(s->status_text);
2356                 s->status_text = t;
2357         }
2358 }
2359
2360 static int service_enumerate(Manager *m) {
2361         char **p;
2362         unsigned i;
2363         DIR *d = NULL;
2364         char *path = NULL, *fpath = NULL, *name = NULL;
2365         int r;
2366
2367         assert(m);
2368
2369         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2370                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2371                         struct dirent *de;
2372
2373                         free(path);
2374                         path = NULL;
2375                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2376                                 r = -ENOMEM;
2377                                 goto finish;
2378                         }
2379
2380                         if (d)
2381                                 closedir(d);
2382
2383                         if (!(d = opendir(path))) {
2384                                 if (errno != ENOENT)
2385                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2386
2387                                 continue;
2388                         }
2389
2390                         while ((de = readdir(d))) {
2391                                 Unit *service;
2392                                 int a, b;
2393
2394                                 if (ignore_file(de->d_name))
2395                                         continue;
2396
2397                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2398                                         continue;
2399
2400                                 if (strlen(de->d_name) < 4)
2401                                         continue;
2402
2403                                 a = undecchar(de->d_name[1]);
2404                                 b = undecchar(de->d_name[2]);
2405
2406                                 if (a < 0 || b < 0)
2407                                         continue;
2408
2409                                 free(fpath);
2410                                 fpath = NULL;
2411                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2412                                         r = -ENOMEM;
2413                                         goto finish;
2414                                 }
2415
2416                                 if (access(fpath, X_OK) < 0) {
2417
2418                                         if (errno != ENOENT)
2419                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2420
2421                                         continue;
2422                                 }
2423
2424                                 free(name);
2425                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2426                                         r = -ENOMEM;
2427                                         goto finish;
2428                                 }
2429
2430                                 if ((r = manager_load_unit_prepare(m, name, NULL, &service)) < 0) {
2431                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2432                                         continue;
2433                                 }
2434
2435                                 if (de->d_name[0] == 'S' &&
2436                                     (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT))
2437                                         SERVICE(service)->sysv_start_priority =
2438                                                 MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2439
2440                                 manager_dispatch_load_queue(m);
2441                                 service = unit_follow_merge(service);
2442
2443                                 if (de->d_name[0] == 'S') {
2444                                         Unit *runlevel_target;
2445
2446                                         if ((r = manager_load_unit(m, rcnd_table[i].target, NULL, &runlevel_target)) < 0)
2447                                                 goto finish;
2448
2449                                         if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
2450                                                 goto finish;
2451
2452                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, runlevel_target, true)) < 0)
2453                                                 goto finish;
2454
2455                                 } else if (de->d_name[0] == 'K' &&
2456                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2457                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2458                                         Unit *shutdown_target;
2459
2460                                         /* We honour K links only for
2461                                          * halt/reboot. For the normal
2462                                          * runlevels we assume the
2463                                          * stop jobs will be
2464                                          * implicitly added by the
2465                                          * core logic. Also, we don't
2466                                          * really distuingish here
2467                                          * between the runlevels 0 and
2468                                          * 6 and just add them to the
2469                                          * special shutdown target. On
2470                                          * SUSE the boot.d/ runlevel
2471                                          * is also used for shutdown,
2472                                          * so we add links for that
2473                                          * too to the shutdown
2474                                          * target.*/
2475
2476                                         if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
2477                                                 goto finish;
2478
2479                                         if ((r = unit_add_dependency(service, UNIT_CONFLICTS, shutdown_target, true)) < 0)
2480                                                 goto finish;
2481
2482                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, shutdown_target, true)) < 0)
2483                                                 goto finish;
2484                                 }
2485                         }
2486                 }
2487
2488         r = 0;
2489
2490 finish:
2491         free(path);
2492         free(fpath);
2493         free(name);
2494
2495         if (d)
2496                 closedir(d);
2497
2498         return r;
2499 }
2500
2501 static void service_bus_name_owner_change(
2502                 Unit *u,
2503                 const char *name,
2504                 const char *old_owner,
2505                 const char *new_owner) {
2506
2507         Service *s = SERVICE(u);
2508
2509         assert(s);
2510         assert(name);
2511
2512         assert(streq(s->bus_name, name));
2513         assert(old_owner || new_owner);
2514
2515         if (old_owner && new_owner)
2516                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2517         else if (old_owner)
2518                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2519         else
2520                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2521
2522         s->bus_name_good = !!new_owner;
2523
2524         if (s->type == SERVICE_DBUS) {
2525
2526                 /* service_enter_running() will figure out what to
2527                  * do */
2528                 if (s->state == SERVICE_RUNNING)
2529                         service_enter_running(s, true);
2530                 else if (s->state == SERVICE_START && new_owner)
2531                         service_enter_start_post(s);
2532
2533         } else if (new_owner &&
2534                    s->main_pid <= 0 &&
2535                    (s->state == SERVICE_START ||
2536                     s->state == SERVICE_START_POST ||
2537                     s->state == SERVICE_RUNNING ||
2538                     s->state == SERVICE_RELOAD)) {
2539
2540                 /* Try to acquire PID from bus service */
2541                 log_debug("Trying to acquire PID from D-Bus name...");
2542
2543                 bus_query_pid(u->meta.manager, name);
2544         }
2545 }
2546
2547 static void service_bus_query_pid_done(
2548                 Unit *u,
2549                 const char *name,
2550                 pid_t pid) {
2551
2552         Service *s = SERVICE(u);
2553
2554         assert(s);
2555         assert(name);
2556
2557         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2558
2559         if (s->main_pid <= 0 &&
2560             (s->state == SERVICE_START ||
2561              s->state == SERVICE_START_POST ||
2562              s->state == SERVICE_RUNNING ||
2563              s->state == SERVICE_RELOAD))
2564                 service_set_main_pid(s, pid);
2565 }
2566
2567 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
2568         assert(s);
2569         assert(fd >= 0);
2570
2571         /* This is called by the socket code when instantiating a new
2572          * service for a stream socket and the socket needs to be
2573          * configured. */
2574
2575         if (UNIT(s)->meta.load_state != UNIT_LOADED)
2576                 return -EINVAL;
2577
2578         if (s->socket_fd >= 0)
2579                 return -EBUSY;
2580
2581         if (s->state != SERVICE_DEAD)
2582                 return -EAGAIN;
2583
2584         s->socket_fd = fd;
2585         s->got_socket_fd = true;
2586         s->socket = sock;
2587
2588         return 0;
2589 }
2590
2591 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2592         [SERVICE_DEAD] = "dead",
2593         [SERVICE_START_PRE] = "start-pre",
2594         [SERVICE_START] = "start",
2595         [SERVICE_START_POST] = "start-post",
2596         [SERVICE_RUNNING] = "running",
2597         [SERVICE_EXITED] = "exited",
2598         [SERVICE_RELOAD] = "reload",
2599         [SERVICE_STOP] = "stop",
2600         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2601         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2602         [SERVICE_STOP_POST] = "stop-post",
2603         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2604         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2605         [SERVICE_MAINTENANCE] = "maintenance",
2606         [SERVICE_AUTO_RESTART] = "auto-restart",
2607 };
2608
2609 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2610
2611 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2612         [SERVICE_ONCE] = "once",
2613         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2614         [SERVICE_RESTART_ALWAYS] = "restart-always",
2615 };
2616
2617 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2618
2619 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2620         [SERVICE_FORKING] = "forking",
2621         [SERVICE_SIMPLE] = "simple",
2622         [SERVICE_FINISH] = "finish",
2623         [SERVICE_DBUS] = "dbus",
2624         [SERVICE_NOTIFY] = "notify"
2625 };
2626
2627 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2628
2629 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2630         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2631         [SERVICE_EXEC_START] = "ExecStart",
2632         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2633         [SERVICE_EXEC_RELOAD] = "ExecReload",
2634         [SERVICE_EXEC_STOP] = "ExecStop",
2635         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2636 };
2637
2638 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2639
2640 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
2641         [NOTIFY_NONE] = "none",
2642         [NOTIFY_MAIN] = "main",
2643         [NOTIFY_ALL] = "all"
2644 };
2645
2646 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
2647
2648 const UnitVTable service_vtable = {
2649         .suffix = ".service",
2650
2651         .init = service_init,
2652         .done = service_done,
2653         .load = service_load,
2654
2655         .coldplug = service_coldplug,
2656
2657         .dump = service_dump,
2658
2659         .start = service_start,
2660         .stop = service_stop,
2661         .reload = service_reload,
2662
2663         .can_reload = service_can_reload,
2664
2665         .serialize = service_serialize,
2666         .deserialize_item = service_deserialize_item,
2667
2668         .active_state = service_active_state,
2669         .sub_state_to_string = service_sub_state_to_string,
2670
2671         .check_gc = service_check_gc,
2672         .check_snapshot = service_check_snapshot,
2673
2674         .sigchld_event = service_sigchld_event,
2675         .timer_event = service_timer_event,
2676
2677         .cgroup_notify_empty = service_cgroup_notify_event,
2678         .notify_message = service_notify_message,
2679
2680         .bus_name_owner_change = service_bus_name_owner_change,
2681         .bus_query_pid_done = service_bus_query_pid_done,
2682
2683         .bus_message_handler = bus_service_message_handler,
2684
2685         .enumerate = service_enumerate
2686 };