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_RELOADING,
  80         [SERVICE_STOP] = UNIT_DEACTIVATING,
  81         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  82         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  83         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  84         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  85         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  86         [SERVICE_MAINTENANCE] = UNIT_MAINTENANCE,
  87         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
  88 };
  89
  90 static void service_init(Unit *u) {
  91         Service *s = SERVICE(u);
  92
  93         assert(u);
  94         assert(u->meta.load_state == UNIT_STUB);
  95
  96         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  97         s->restart_usec = DEFAULT_RESTART_USEC;
  98         s->timer_watch.type = WATCH_INVALID;
  99         s->sysv_start_priority = -1;
 100         s->socket_fd = -1;
 101
 102         exec_context_init(&s->exec_context);
 103
 104         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 105
 106         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 107 }
 108
 109 static void service_unwatch_control_pid(Service *s) {
 110         assert(s);
 111
 112         if (s->control_pid <= 0)
 113                 return;
 114
 115         unit_unwatch_pid(UNIT(s), s->control_pid);
 116         s->control_pid = 0;
 117 }
 118
 119 static void service_unwatch_main_pid(Service *s) {
 120         assert(s);
 121
 122         if (s->main_pid <= 0)
 123                 return;
 124
 125         unit_unwatch_pid(UNIT(s), s->main_pid);
 126         s->main_pid = 0;
 127 }
 128
 129 static int service_set_main_pid(Service *s, pid_t pid) {
 130         pid_t ppid;
 131
 132         assert(s);
 133
 134         if (pid <= 1)
 135                 return -EINVAL;
 136
 137         if (pid == getpid())
 138                 return -EINVAL;
 139
 140         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 141                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 142                             s->meta.id, (unsigned long) pid);
 143
 144         s->main_pid = pid;
 145         s->main_pid_known = true;
 146
 147         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, 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, s->meta.manager->lookup_paths.sysvinit_path) {
 715                 char *path;
 716                 int r;
 717
 718                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 719                         return -ENOMEM;
 720
 721                 assert(endswith(path, ".service"));
 722                 path[strlen(path)-8] = 0;
 723
 724                 r = service_load_sysv_path(s, path);
 725
 726                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 727                         /* Try Debian style xxx.sh source'able init scripts */
 728                         strcat(path, ".sh");
 729                         r = service_load_sysv_path(s, path);
 730                 }
 731
 732                 free(path);
 733
 734                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 735                         /* Try SUSE style boot.xxx init scripts */
 736
 737                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 738                                 return -ENOMEM;
 739
 740                         path[strlen(path)-8] = 0;
 741                         r = service_load_sysv_path(s, path);
 742                         free(path);
 743                 }
 744
 745                 if (r < 0)
 746                         return r;
 747
 748                 if ((s->meta.load_state != UNIT_STUB))
 749                         break;
 750         }
 751
 752         return 0;
 753 }
 754
 755 static int service_load_sysv(Service *s) {
 756         const char *t;
 757         Iterator i;
 758         int r;
 759
 760         assert(s);
 761
 762         /* Load service data from SysV init scripts, preferably with
 763          * LSB headers ... */
 764
 765         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 766                 return 0;
 767
 768         if ((t = s->meta.id))
 769                 if ((r = service_load_sysv_name(s, t)) < 0)
 770                         return r;
 771
 772         if (s->meta.load_state == UNIT_STUB)
 773                 SET_FOREACH(t, s->meta.names, i) {
 774                         if (t == s->meta.id)
 775                                 continue;
 776
 777                         if ((r == service_load_sysv_name(s, t)) < 0)
 778                                 return r;
 779
 780                         if (s->meta.load_state != UNIT_STUB)
 781                                 break;
 782                 }
 783
 784         return 0;
 785 }
 786
 787 static int service_add_bus_name(Service *s) {
 788         char *n;
 789         int r;
 790
 791         assert(s);
 792         assert(s->bus_name);
 793
 794         if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
 795                 return 0;
 796
 797         r = unit_merge_by_name(UNIT(s), n);
 798         free(n);
 799
 800         return r;
 801 }
 802
 803 static int service_verify(Service *s) {
 804         assert(s);
 805
 806         if (s->meta.load_state != UNIT_LOADED)
 807                 return 0;
 808
 809         if (!s->exec_command[SERVICE_EXEC_START]) {
 810                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
 811                 return -EINVAL;
 812         }
 813
 814         if (s->exec_command[SERVICE_EXEC_START]->command_next) {
 815                 log_error("%s has more than one ExecStart setting. Refusing.", s->meta.id);
 816                 return -EINVAL;
 817         }
 818
 819         if (s->type == SERVICE_DBUS && !s->bus_name) {
 820                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
 821                 return -EINVAL;
 822         }
 823
 824         if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
 825                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 826                 return -EINVAL;
 827         }
 828
 829         return 0;
 830 }
 831
 832 static int service_load(Unit *u) {
 833         int r;
 834         Service *s = SERVICE(u);
 835
 836         assert(s);
 837
 838         /* Load a .service file */
 839         if ((r = unit_load_fragment(u)) < 0)
 840                 return r;
 841
 842         /* Load a classic init script as a fallback, if we couldn't find anything */
 843         if (u->meta.load_state == UNIT_STUB)
 844                 if ((r = service_load_sysv(s)) < 0)
 845                         return r;
 846
 847         /* Still nothing found? Then let's give up */
 848         if (u->meta.load_state == UNIT_STUB)
 849                 return -ENOENT;
 850
 851         /* We were able to load something, then let's add in the
 852          * dropin directories. */
 853         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 854                 return r;
 855
 856         /* This is a new unit? Then let's add in some extras */
 857         if (u->meta.load_state == UNIT_LOADED) {
 858                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 859                         return r;
 860
 861                 if ((r = unit_add_default_cgroup(u)) < 0)
 862                         return r;
 863
 864                 if ((r = sysv_fix_order(s)) < 0)
 865                         return r;
 866
 867                 if (s->bus_name) {
 868                         if ((r = service_add_bus_name(s)) < 0)
 869                                 return r;
 870
 871                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 872                             return r;
 873                 }
 874
 875                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
 876                         s->notify_access = NOTIFY_MAIN;
 877         }
 878
 879         return service_verify(s);
 880 }
 881
 882 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 883
 884         ServiceExecCommand c;
 885         Service *s = SERVICE(u);
 886         const char *prefix2;
 887         char *p2;
 888
 889         assert(s);
 890
 891         p2 = strappend(prefix, "\t");
 892         prefix2 = p2 ? p2 : prefix;
 893
 894         fprintf(f,
 895                 "%sService State: %s\n"
 896                 "%sPermissionsStartOnly: %s\n"
 897                 "%sRootDirectoryStartOnly: %s\n"
 898                 "%sValidNoProcess: %s\n"
 899                 "%sKillMode: %s\n"
 900                 "%sType: %s\n"
 901                 "%sNotifyAccess: %s\n",
 902                 prefix, service_state_to_string(s->state),
 903                 prefix, yes_no(s->permissions_start_only),
 904                 prefix, yes_no(s->root_directory_start_only),
 905                 prefix, yes_no(s->valid_no_process),
 906                 prefix, kill_mode_to_string(s->kill_mode),
 907                 prefix, service_type_to_string(s->type),
 908                 prefix, notify_access_to_string(s->notify_access));
 909
 910         if (s->control_pid > 0)
 911                 fprintf(f,
 912                         "%sControl PID: %lu\n",
 913                         prefix, (unsigned long) s->control_pid);
 914
 915         if (s->main_pid > 0)
 916                 fprintf(f,
 917                         "%sMain PID: %lu\n",
 918                         prefix, (unsigned long) s->main_pid);
 919
 920         if (s->pid_file)
 921                 fprintf(f,
 922                         "%sPIDFile: %s\n",
 923                         prefix, s->pid_file);
 924
 925         if (s->bus_name)
 926                 fprintf(f,
 927                         "%sBusName: %s\n"
 928                         "%sBus Name Good: %s\n",
 929                         prefix, s->bus_name,
 930                         prefix, yes_no(s->bus_name_good));
 931
 932         exec_context_dump(&s->exec_context, f, prefix);
 933
 934         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 935
 936                 if (!s->exec_command[c])
 937                         continue;
 938
 939                 fprintf(f, "%s-> %s:\n",
 940                         prefix, service_exec_command_to_string(c));
 941
 942                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 943         }
 944
 945         if (s->sysv_path)
 946                 fprintf(f,
 947                         "%sSysV Init Script Path: %s\n"
 948                         "%sSysV Init Script has LSB Header: %s\n",
 949                         prefix, s->sysv_path,
 950                         prefix, yes_no(s->sysv_has_lsb));
 951
 952         if (s->sysv_start_priority >= 0)
 953                 fprintf(f,
 954                         "%sSysVStartPriority: %i\n",
 955                         prefix, s->sysv_start_priority);
 956
 957         if (s->sysv_runlevels)
 958                 fprintf(f, "%sSysVRunLevels: %s\n",
 959                         prefix, s->sysv_runlevels);
 960
 961         if (s->status_text)
 962                 fprintf(f, "%sStatus Text: %s\n",
 963                         prefix, s->status_text);
 964
 965         free(p2);
 966 }
 967
 968 static int service_load_pid_file(Service *s) {
 969         char *k;
 970         int r;
 971         pid_t pid;
 972
 973         assert(s);
 974
 975         if (s->main_pid_known)
 976                 return 0;
 977
 978         assert(s->main_pid <= 0);
 979
 980         if (!s->pid_file)
 981                 return -ENOENT;
 982
 983         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 984                 return r;
 985
 986         r = parse_pid(k, &pid);
 987         free(k);
 988
 989         if (r < 0)
 990                 return r;
 991
 992         if (kill(pid, 0) < 0 && errno != EPERM) {
 993                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
 994                             (unsigned long) pid, s->pid_file);
 995                 return -ESRCH;
 996         }
 997
 998         if ((r = service_set_main_pid(s, pid)) < 0)
 999                 return r;
1000
1001         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1002                 /* FIXME: we need to do something here */
1003                 return r;
1004
1005         return 0;
1006 }
1007
1008 static int service_get_sockets(Service *s, Set **_set) {
1009         Set *set;
1010         Iterator i;
1011         char *t;
1012         int r;
1013
1014         assert(s);
1015         assert(_set);
1016
1017         if (s->socket_fd >= 0)
1018                 return 0;
1019
1020         /* Collects all Socket objects that belong to this
1021          * service. Note that a service might have multiple sockets
1022          * via multiple names. */
1023
1024         if (!(set = set_new(NULL, NULL)))
1025                 return -ENOMEM;
1026
1027         SET_FOREACH(t, s->meta.names, i) {
1028                 char *k;
1029                 Unit *p;
1030
1031                 /* Look for all socket objects that go by any of our
1032                  * units and collect their fds */
1033
1034                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1035                         r = -ENOMEM;
1036                         goto fail;
1037                 }
1038
1039                 p = manager_get_unit(s->meta.manager, k);
1040                 free(k);
1041
1042                 if (!p)
1043                         continue;
1044
1045                 if ((r = set_put(set, p)) < 0)
1046                         goto fail;
1047         }
1048
1049         *_set = set;
1050         return 0;
1051
1052 fail:
1053         set_free(set);
1054         return r;
1055 }
1056
1057 static int service_notify_sockets_dead(Service *s) {
1058         Iterator i;
1059         Set *set;
1060         Socket *sock;
1061         int r;
1062
1063         assert(s);
1064
1065         if (s->socket_fd >= 0)
1066                 return 0;
1067
1068         /* Notifies all our sockets when we die */
1069         if ((r = service_get_sockets(s, &set)) < 0)
1070                 return r;
1071
1072         SET_FOREACH(sock, set, i)
1073                 socket_notify_service_dead(sock);
1074
1075         set_free(set);
1076
1077         return 0;
1078 }
1079
1080 static void service_set_state(Service *s, ServiceState state) {
1081         ServiceState old_state;
1082         assert(s);
1083
1084         old_state = s->state;
1085         s->state = state;
1086
1087         if (state != SERVICE_START_PRE &&
1088             state != SERVICE_START &&
1089             state != SERVICE_START_POST &&
1090             state != SERVICE_RELOAD &&
1091             state != SERVICE_STOP &&
1092             state != SERVICE_STOP_SIGTERM &&
1093             state != SERVICE_STOP_SIGKILL &&
1094             state != SERVICE_STOP_POST &&
1095             state != SERVICE_FINAL_SIGTERM &&
1096             state != SERVICE_FINAL_SIGKILL &&
1097             state != SERVICE_AUTO_RESTART)
1098                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1099
1100         if (state != SERVICE_START &&
1101             state != SERVICE_START_POST &&
1102             state != SERVICE_RUNNING &&
1103             state != SERVICE_RELOAD &&
1104             state != SERVICE_STOP &&
1105             state != SERVICE_STOP_SIGTERM &&
1106             state != SERVICE_STOP_SIGKILL)
1107                 service_unwatch_main_pid(s);
1108
1109         if (state != SERVICE_START_PRE &&
1110             state != SERVICE_START &&
1111             state != SERVICE_START_POST &&
1112             state != SERVICE_RELOAD &&
1113             state != SERVICE_STOP &&
1114             state != SERVICE_STOP_SIGTERM &&
1115             state != SERVICE_STOP_SIGKILL &&
1116             state != SERVICE_STOP_POST &&
1117             state != SERVICE_FINAL_SIGTERM &&
1118             state != SERVICE_FINAL_SIGKILL) {
1119                 service_unwatch_control_pid(s);
1120                 s->control_command = NULL;
1121                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1122         }
1123
1124         if (state == SERVICE_DEAD ||
1125             state == SERVICE_STOP ||
1126             state == SERVICE_STOP_SIGTERM ||
1127             state == SERVICE_STOP_SIGKILL ||
1128             state == SERVICE_STOP_POST ||
1129             state == SERVICE_FINAL_SIGTERM ||
1130             state == SERVICE_FINAL_SIGKILL ||
1131             state == SERVICE_MAINTENANCE ||
1132             state == SERVICE_AUTO_RESTART)
1133                 service_notify_sockets_dead(s);
1134
1135         if (state != SERVICE_START_PRE &&
1136             state != SERVICE_START &&
1137             state != SERVICE_START_POST &&
1138             state != SERVICE_RUNNING &&
1139             state != SERVICE_RELOAD &&
1140             state != SERVICE_STOP &&
1141             state != SERVICE_STOP_SIGTERM &&
1142             state != SERVICE_STOP_SIGKILL &&
1143             state != SERVICE_STOP_POST &&
1144             state != SERVICE_FINAL_SIGTERM &&
1145             state != SERVICE_FINAL_SIGKILL &&
1146             !(state == SERVICE_DEAD && s->meta.job)) {
1147                 service_close_socket_fd(s);
1148                 service_connection_unref(s);
1149         }
1150
1151         if (old_state != state)
1152                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1153
1154         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1155 }
1156
1157 static int service_coldplug(Unit *u) {
1158         Service *s = SERVICE(u);
1159         int r;
1160
1161         assert(s);
1162         assert(s->state == SERVICE_DEAD);
1163
1164         if (s->deserialized_state != s->state) {
1165
1166                 if (s->deserialized_state == SERVICE_START_PRE ||
1167                     s->deserialized_state == SERVICE_START ||
1168                     s->deserialized_state == SERVICE_START_POST ||
1169                     s->deserialized_state == SERVICE_RELOAD ||
1170                     s->deserialized_state == SERVICE_STOP ||
1171                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1172                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1173                     s->deserialized_state == SERVICE_STOP_POST ||
1174                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1175                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1176                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1177
1178                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1179                                 usec_t k;
1180
1181                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1182
1183                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1184                                         return r;
1185                         }
1186                 }
1187
1188                 if ((s->deserialized_state == SERVICE_START &&
1189                      (s->type == SERVICE_FORKING ||
1190                       s->type == SERVICE_DBUS ||
1191                       s->type == SERVICE_FINISH ||
1192                       s->type == SERVICE_NOTIFY)) ||
1193                     s->deserialized_state == SERVICE_START_POST ||
1194                     s->deserialized_state == SERVICE_RUNNING ||
1195                     s->deserialized_state == SERVICE_RELOAD ||
1196                     s->deserialized_state == SERVICE_STOP ||
1197                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1198                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1199                         if (s->main_pid > 0)
1200                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1201                                         return r;
1202
1203                 if (s->deserialized_state == SERVICE_START_PRE ||
1204                     s->deserialized_state == SERVICE_START ||
1205                     s->deserialized_state == SERVICE_START_POST ||
1206                     s->deserialized_state == SERVICE_RELOAD ||
1207                     s->deserialized_state == SERVICE_STOP ||
1208                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1209                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1210                     s->deserialized_state == SERVICE_STOP_POST ||
1211                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1212                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1213                         if (s->control_pid > 0)
1214                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1215                                         return r;
1216
1217                 service_set_state(s, s->deserialized_state);
1218         }
1219
1220         return 0;
1221 }
1222
1223 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1224         Iterator i;
1225         int r;
1226         int *rfds = NULL;
1227         unsigned rn_fds = 0;
1228         Set *set;
1229         Socket *sock;
1230
1231         assert(s);
1232         assert(fds);
1233         assert(n_fds);
1234
1235         if (s->socket_fd >= 0)
1236                 return 0;
1237
1238         if ((r = service_get_sockets(s, &set)) < 0)
1239                 return r;
1240
1241         SET_FOREACH(sock, set, i) {
1242                 int *cfds;
1243                 unsigned cn_fds;
1244
1245                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1246                         goto fail;
1247
1248                 if (!cfds)
1249                         continue;
1250
1251                 if (!rfds) {
1252                         rfds = cfds;
1253                         rn_fds = cn_fds;
1254                 } else {
1255                         int *t;
1256
1257                         if (!(t = new(int, rn_fds+cn_fds))) {
1258                                 free(cfds);
1259                                 r = -ENOMEM;
1260                                 goto fail;
1261                         }
1262
1263                         memcpy(t, rfds, rn_fds);
1264                         memcpy(t+rn_fds, cfds, cn_fds);
1265                         free(rfds);
1266                         free(cfds);
1267
1268                         rfds = t;
1269                         rn_fds = rn_fds+cn_fds;
1270                 }
1271         }
1272
1273         *fds = rfds;
1274         *n_fds = rn_fds;
1275
1276         set_free(set);
1277
1278         return 0;
1279
1280 fail:
1281         set_free(set);
1282         free(rfds);
1283
1284         return r;
1285 }
1286
1287 static int service_spawn(
1288                 Service *s,
1289                 ExecCommand *c,
1290                 bool timeout,
1291                 bool pass_fds,
1292                 bool apply_permissions,
1293                 bool apply_chroot,
1294                 bool set_notify_socket,
1295                 pid_t *_pid) {
1296
1297         pid_t pid;
1298         int r;
1299         int *fds = NULL, *fdsbuf = NULL;
1300         unsigned n_fds = 0;
1301         char **argv = NULL, **env = NULL;
1302
1303         assert(s);
1304         assert(c);
1305         assert(_pid);
1306
1307         if (pass_fds ||
1308             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1309             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1310             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1311
1312                 if (s->socket_fd >= 0) {
1313                         fds = &s->socket_fd;
1314                         n_fds = 1;
1315                 } else {
1316                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1317                                 goto fail;
1318
1319                         fds = fdsbuf;
1320                 }
1321         }
1322
1323         if (timeout && s->timeout_usec) {
1324                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1325                         goto fail;
1326         } else
1327                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1328
1329         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1330                 r = -ENOMEM;
1331                 goto fail;
1332         }
1333
1334         if (set_notify_socket) {
1335                 char *t;
1336
1337                 if (asprintf(&t, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1338                         r = -ENOMEM;
1339                         goto fail;
1340                 }
1341
1342                 env = strv_env_set(s->meta.manager->environment, t);
1343                 free(t);
1344
1345                 if (!env) {
1346                         r = -ENOMEM;
1347                         goto fail;
1348                 }
1349         } else
1350                 env = s->meta.manager->environment;
1351
1352         r = exec_spawn(c,
1353                        argv,
1354                        &s->exec_context,
1355                        fds, n_fds,
1356                        env,
1357                        apply_permissions,
1358                        apply_chroot,
1359                        s->meta.manager->confirm_spawn,
1360                        s->meta.cgroup_bondings,
1361                        &pid);
1362
1363         strv_free(argv);
1364         argv = NULL;
1365
1366         if (set_notify_socket)
1367                 strv_free(env);
1368         env = NULL;
1369
1370         if (r < 0)
1371                 goto fail;
1372
1373         if (fdsbuf)
1374                 free(fdsbuf);
1375
1376         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1377                 /* FIXME: we need to do something here */
1378                 goto fail;
1379
1380         *_pid = pid;
1381
1382         return 0;
1383
1384 fail:
1385         free(fds);
1386
1387         strv_free(argv);
1388
1389         if (set_notify_socket)
1390                 strv_free(env);
1391
1392         if (timeout)
1393                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1394
1395         return r;
1396 }
1397
1398 static int main_pid_good(Service *s) {
1399         assert(s);
1400
1401         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1402          * don't know */
1403
1404         /* If we know the pid file, then lets just check if it is
1405          * still valid */
1406         if (s->main_pid_known)
1407                 return s->main_pid > 0;
1408
1409         /* We don't know the pid */
1410         return -EAGAIN;
1411 }
1412
1413 static int control_pid_good(Service *s) {
1414         assert(s);
1415
1416         return s->control_pid > 0;
1417 }
1418
1419 static int cgroup_good(Service *s) {
1420         int r;
1421
1422         assert(s);
1423
1424         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1425                 return r;
1426
1427         return !r;
1428 }
1429
1430 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1431         int r;
1432         assert(s);
1433
1434         if (!success)
1435                 s->failure = true;
1436
1437         if (allow_restart &&
1438             s->allow_restart &&
1439             (s->restart == SERVICE_RESTART_ALWAYS ||
1440              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1441
1442                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1443                         goto fail;
1444
1445                 service_set_state(s, SERVICE_AUTO_RESTART);
1446         } else
1447                 service_set_state(s, s->failure ? SERVICE_MAINTENANCE : SERVICE_DEAD);
1448
1449         return;
1450
1451 fail:
1452         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1453         service_enter_dead(s, false, false);
1454 }
1455
1456 static void service_enter_signal(Service *s, ServiceState state, bool success);
1457
1458 static void service_enter_stop_post(Service *s, bool success) {
1459         int r;
1460         assert(s);
1461
1462         if (!success)
1463                 s->failure = true;
1464
1465         service_unwatch_control_pid(s);
1466
1467         s->control_command_id = SERVICE_EXEC_STOP_POST;
1468         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1469                 if ((r = service_spawn(s,
1470                                        s->control_command,
1471                                        true,
1472                                        false,
1473                                        !s->permissions_start_only,
1474                                        !s->root_directory_start_only,
1475                                        false,
1476                                        &s->control_pid)) < 0)
1477                         goto fail;
1478
1479
1480                 service_set_state(s, SERVICE_STOP_POST);
1481         } else
1482                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1483
1484         return;
1485
1486 fail:
1487         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1488         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1489 }
1490
1491 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1492         int r;
1493         bool sent = false;
1494
1495         assert(s);
1496
1497         if (!success)
1498                 s->failure = true;
1499
1500         if (s->kill_mode != KILL_NONE) {
1501                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1502
1503                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1504
1505                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
1506                                 if (r != -EAGAIN && r != -ESRCH)
1507                                         goto fail;
1508                         } else
1509                                 sent = true;
1510                 }
1511
1512                 if (!sent) {
1513                         r = 0;
1514
1515                         if (s->main_pid > 0) {
1516                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1517                                         r = -errno;
1518                                 else
1519                                         sent = true;
1520                         }
1521
1522                         if (s->control_pid > 0) {
1523                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1524                                         r = -errno;
1525                                 else
1526                                         sent = true;
1527                         }
1528
1529                         if (r < 0)
1530                                 goto fail;
1531                 }
1532         }
1533
1534         if (sent && (s->main_pid > 0 || s->control_pid > 0)) {
1535                 if (s->timeout_usec > 0)
1536                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1537                                 goto fail;
1538
1539                 service_set_state(s, state);
1540         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1541                 service_enter_stop_post(s, true);
1542         else
1543                 service_enter_dead(s, true, true);
1544
1545         return;
1546
1547 fail:
1548         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1549
1550         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1551                 service_enter_stop_post(s, false);
1552         else
1553                 service_enter_dead(s, false, true);
1554 }
1555
1556 static void service_enter_stop(Service *s, bool success) {
1557         int r;
1558
1559         assert(s);
1560
1561         if (!success)
1562                 s->failure = true;
1563
1564         service_unwatch_control_pid(s);
1565
1566         s->control_command_id = SERVICE_EXEC_STOP;
1567         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1568                 if ((r = service_spawn(s,
1569                                        s->control_command,
1570                                        true,
1571                                        false,
1572                                        !s->permissions_start_only,
1573                                        !s->root_directory_start_only,
1574                                        false,
1575                                        &s->control_pid)) < 0)
1576                         goto fail;
1577
1578                 service_set_state(s, SERVICE_STOP);
1579         } else
1580                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1581
1582         return;
1583
1584 fail:
1585         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1586         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1587 }
1588
1589 static void service_enter_running(Service *s, bool success) {
1590         int main_pid_ok, cgroup_ok;
1591         assert(s);
1592
1593         if (!success)
1594                 s->failure = true;
1595
1596         main_pid_ok = main_pid_good(s);
1597         cgroup_ok = cgroup_good(s);
1598
1599         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1600             (s->bus_name_good || s->type != SERVICE_DBUS))
1601                 service_set_state(s, SERVICE_RUNNING);
1602         else if (s->valid_no_process)
1603                 service_set_state(s, SERVICE_EXITED);
1604         else
1605                 service_enter_stop(s, true);
1606 }
1607
1608 static void service_enter_start_post(Service *s) {
1609         int r;
1610         assert(s);
1611
1612         service_unwatch_control_pid(s);
1613
1614         s->control_command_id = SERVICE_EXEC_START_POST;
1615         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1616                 if ((r = service_spawn(s,
1617                                        s->control_command,
1618                                        true,
1619                                        false,
1620                                        !s->permissions_start_only,
1621                                        !s->root_directory_start_only,
1622                                        false,
1623                                        &s->control_pid)) < 0)
1624                         goto fail;
1625
1626                 service_set_state(s, SERVICE_START_POST);
1627         } else
1628                 service_enter_running(s, true);
1629
1630         return;
1631
1632 fail:
1633         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1634         service_enter_stop(s, false);
1635 }
1636
1637 static void service_enter_start(Service *s) {
1638         pid_t pid;
1639         int r;
1640
1641         assert(s);
1642
1643         assert(s->exec_command[SERVICE_EXEC_START]);
1644         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1645
1646         if (s->type == SERVICE_FORKING)
1647                 service_unwatch_control_pid(s);
1648         else
1649                 service_unwatch_main_pid(s);
1650
1651         if ((r = service_spawn(s,
1652                                s->exec_command[SERVICE_EXEC_START],
1653                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1654                                true,
1655                                true,
1656                                true,
1657                                s->notify_access != NOTIFY_NONE,
1658                                &pid)) < 0)
1659                 goto fail;
1660
1661         if (s->type == SERVICE_SIMPLE) {
1662                 /* For simple services we immediately start
1663                  * the START_POST binaries. */
1664
1665                 service_set_main_pid(s, pid);
1666                 service_enter_start_post(s);
1667
1668         } else  if (s->type == SERVICE_FORKING) {
1669
1670                 /* For forking services we wait until the start
1671                  * process exited. */
1672
1673                 s->control_command_id = SERVICE_EXEC_START;
1674                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1675
1676                 s->control_pid = pid;
1677                 service_set_state(s, SERVICE_START);
1678
1679         } else if (s->type == SERVICE_FINISH ||
1680                    s->type == SERVICE_DBUS ||
1681                    s->type == SERVICE_NOTIFY) {
1682
1683                 /* For finishing services we wait until the start
1684                  * process exited, too, but it is our main process. */
1685
1686                 /* For D-Bus services we know the main pid right away,
1687                  * but wait for the bus name to appear on the
1688                  * bus. Notify services are similar. */
1689
1690                 service_set_main_pid(s, pid);
1691                 service_set_state(s, SERVICE_START);
1692         } else
1693                 assert_not_reached("Unknown service type");
1694
1695         return;
1696
1697 fail:
1698         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
1699         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1700 }
1701
1702 static void service_enter_start_pre(Service *s) {
1703         int r;
1704
1705         assert(s);
1706
1707         service_unwatch_control_pid(s);
1708
1709         s->control_command_id = SERVICE_EXEC_START_PRE;
1710         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1711                 if ((r = service_spawn(s,
1712                                        s->control_command,
1713                                        true,
1714                                        false,
1715                                        !s->permissions_start_only,
1716                                        !s->root_directory_start_only,
1717                                        false,
1718                                        &s->control_pid)) < 0)
1719                         goto fail;
1720
1721                 service_set_state(s, SERVICE_START_PRE);
1722         } else
1723                 service_enter_start(s);
1724
1725         return;
1726
1727 fail:
1728         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1729         service_enter_dead(s, false, true);
1730 }
1731
1732 static void service_enter_restart(Service *s) {
1733         int r;
1734         assert(s);
1735
1736         service_enter_dead(s, true, false);
1737
1738         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1739                 goto fail;
1740
1741         log_debug("%s scheduled restart job.", s->meta.id);
1742         return;
1743
1744 fail:
1745
1746         log_warning("%s failed to schedule restart job: %s", s->meta.id, strerror(-r));
1747         service_enter_dead(s, false, false);
1748 }
1749
1750 static void service_enter_reload(Service *s) {
1751         int r;
1752
1753         assert(s);
1754
1755         service_unwatch_control_pid(s);
1756
1757         s->control_command_id = SERVICE_EXEC_RELOAD;
1758         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1759                 if ((r = service_spawn(s,
1760                                        s->control_command,
1761                                        true,
1762                                        false,
1763                                        !s->permissions_start_only,
1764                                        !s->root_directory_start_only,
1765                                        false,
1766                                        &s->control_pid)) < 0)
1767                         goto fail;
1768
1769                 service_set_state(s, SERVICE_RELOAD);
1770         } else
1771                 service_enter_running(s, true);
1772
1773         return;
1774
1775 fail:
1776         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
1777         service_enter_stop(s, false);
1778 }
1779
1780 static void service_run_next(Service *s, bool success) {
1781         int r;
1782
1783         assert(s);
1784         assert(s->control_command);
1785         assert(s->control_command->command_next);
1786
1787         if (!success)
1788                 s->failure = true;
1789
1790         s->control_command = s->control_command->command_next;
1791
1792         service_unwatch_control_pid(s);
1793
1794         if ((r = service_spawn(s,
1795                                s->control_command,
1796                                true,
1797                                false,
1798                                !s->permissions_start_only,
1799                                !s->root_directory_start_only,
1800                                false,
1801                                &s->control_pid)) < 0)
1802                 goto fail;
1803
1804         return;
1805
1806 fail:
1807         log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1808
1809         if (s->state == SERVICE_START_PRE)
1810                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1811         else if (s->state == SERVICE_STOP)
1812                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1813         else if (s->state == SERVICE_STOP_POST)
1814                 service_enter_dead(s, false, true);
1815         else
1816                 service_enter_stop(s, false);
1817 }
1818
1819 static int service_start(Unit *u) {
1820         Service *s = SERVICE(u);
1821
1822         assert(s);
1823
1824         /* We cannot fulfill this request right now, try again later
1825          * please! */
1826         if (s->state == SERVICE_STOP ||
1827             s->state == SERVICE_STOP_SIGTERM ||
1828             s->state == SERVICE_STOP_SIGKILL ||
1829             s->state == SERVICE_STOP_POST ||
1830             s->state == SERVICE_FINAL_SIGTERM ||
1831             s->state == SERVICE_FINAL_SIGKILL)
1832                 return -EAGAIN;
1833
1834         /* Already on it! */
1835         if (s->state == SERVICE_START_PRE ||
1836             s->state == SERVICE_START ||
1837             s->state == SERVICE_START_POST)
1838                 return 0;
1839
1840         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTENANCE || s->state == SERVICE_AUTO_RESTART);
1841
1842         /* Make sure we don't enter a busy loop of some kind. */
1843         if (!ratelimit_test(&s->ratelimit)) {
1844                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1845                 return -ECANCELED;
1846         }
1847
1848         s->failure = false;
1849         s->main_pid_known = false;
1850         s->allow_restart = true;
1851
1852         service_enter_start_pre(s);
1853         return 0;
1854 }
1855
1856 static int service_stop(Unit *u) {
1857         Service *s = SERVICE(u);
1858
1859         assert(s);
1860
1861         /* Cannot do this now */
1862         if (s->state == SERVICE_START_PRE ||
1863             s->state == SERVICE_START ||
1864             s->state == SERVICE_START_POST ||
1865             s->state == SERVICE_RELOAD)
1866                 return -EAGAIN;
1867
1868         /* Already on it */
1869         if (s->state == SERVICE_STOP ||
1870             s->state == SERVICE_STOP_SIGTERM ||
1871             s->state == SERVICE_STOP_SIGKILL ||
1872             s->state == SERVICE_STOP_POST ||
1873             s->state == SERVICE_FINAL_SIGTERM ||
1874             s->state == SERVICE_FINAL_SIGKILL)
1875                 return 0;
1876
1877         if (s->state == SERVICE_AUTO_RESTART) {
1878                 service_set_state(s, SERVICE_DEAD);
1879                 return 0;
1880         }
1881
1882         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1883
1884         /* This is a user request, so don't do restarts on this
1885          * shutdown. */
1886         s->allow_restart = false;
1887
1888         service_enter_stop(s, true);
1889         return 0;
1890 }
1891
1892 static int service_reload(Unit *u) {
1893         Service *s = SERVICE(u);
1894
1895         assert(s);
1896
1897         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1898
1899         service_enter_reload(s);
1900         return 0;
1901 }
1902
1903 static bool service_can_reload(Unit *u) {
1904         Service *s = SERVICE(u);
1905
1906         assert(s);
1907
1908         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1909 }
1910
1911 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1912         Service *s = SERVICE(u);
1913
1914         assert(u);
1915         assert(f);
1916         assert(fds);
1917
1918         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1919         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1920
1921         if (s->control_pid > 0)
1922                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1923
1924         if (s->main_pid_known && s->main_pid > 0)
1925                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
1926
1927         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1928
1929         /* There's a minor uncleanliness here: if there are multiple
1930          * commands attached here, we will start from the first one
1931          * again */
1932         if (s->control_command_id >= 0)
1933                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
1934
1935         if (s->socket_fd >= 0) {
1936                 int copy;
1937
1938                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1939                         return copy;
1940
1941                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1942         }
1943
1944         return 0;
1945 }
1946
1947 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1948         Service *s = SERVICE(u);
1949         int r;
1950
1951         assert(u);
1952         assert(key);
1953         assert(value);
1954         assert(fds);
1955
1956         if (streq(key, "state")) {
1957                 ServiceState state;
1958
1959                 if ((state = service_state_from_string(value)) < 0)
1960                         log_debug("Failed to parse state value %s", value);
1961                 else
1962                         s->deserialized_state = state;
1963         } else if (streq(key, "failure")) {
1964                 int b;
1965
1966                 if ((b = parse_boolean(value)) < 0)
1967                         log_debug("Failed to parse failure value %s", value);
1968                 else
1969                         s->failure = b || s->failure;
1970         } else if (streq(key, "control-pid")) {
1971                 pid_t pid;
1972
1973                 if ((r = parse_pid(value, &pid)) < 0)
1974                         log_debug("Failed to parse control-pid value %s", value);
1975                 else
1976                         s->control_pid = pid;
1977         } else if (streq(key, "main-pid")) {
1978                 pid_t pid;
1979
1980                 if ((r = parse_pid(value, &pid)) < 0)
1981                         log_debug("Failed to parse main-pid value %s", value);
1982                 else
1983                         service_set_main_pid(s, (pid_t) pid);
1984         } else if (streq(key, "main-pid-known")) {
1985                 int b;
1986
1987                 if ((b = parse_boolean(value)) < 0)
1988                         log_debug("Failed to parse main-pid-known value %s", value);
1989                 else
1990                         s->main_pid_known = b;
1991         } else if (streq(key, "control-command")) {
1992                 ServiceExecCommand id;
1993
1994                 if ((id = service_exec_command_from_string(value)) < 0)
1995                         log_debug("Failed to parse exec-command value %s", value);
1996                 else {
1997                         s->control_command_id = id;
1998                         s->control_command = s->exec_command[id];
1999                 }
2000         } else if (streq(key, "socket-fd")) {
2001                 int fd;
2002
2003                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2004                         log_debug("Failed to parse socket-fd value %s", value);
2005                 else {
2006
2007                         if (s->socket_fd >= 0)
2008                                 close_nointr_nofail(s->socket_fd);
2009                         s->socket_fd = fdset_remove(fds, fd);
2010                 }
2011         } else
2012                 log_debug("Unknown serialization key '%s'", key);
2013
2014         return 0;
2015 }
2016
2017 static UnitActiveState service_active_state(Unit *u) {
2018         assert(u);
2019
2020         return state_translation_table[SERVICE(u)->state];
2021 }
2022
2023 static const char *service_sub_state_to_string(Unit *u) {
2024         assert(u);
2025
2026         return service_state_to_string(SERVICE(u)->state);
2027 }
2028
2029 static bool service_check_gc(Unit *u) {
2030         Service *s = SERVICE(u);
2031
2032         assert(s);
2033
2034         return !!s->sysv_path;
2035 }
2036
2037 static bool service_check_snapshot(Unit *u) {
2038         Service *s = SERVICE(u);
2039
2040         assert(s);
2041
2042         return !s->got_socket_fd;
2043 }
2044
2045 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2046         Service *s = SERVICE(u);
2047         bool success;
2048
2049         assert(s);
2050         assert(pid >= 0);
2051
2052         success = is_clean_exit(code, status);
2053         s->failure = s->failure || !success;
2054
2055         if (s->main_pid == pid) {
2056
2057                 exec_status_fill(&s->main_exec_status, pid, code, status);
2058                 s->main_pid = 0;
2059
2060                 if (s->type != SERVICE_FORKING) {
2061                         assert(s->exec_command[SERVICE_EXEC_START]);
2062                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
2063                 }
2064
2065                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2066
2067                 /* The service exited, so the service is officially
2068                  * gone. */
2069
2070                 switch (s->state) {
2071
2072                 case SERVICE_START_POST:
2073                 case SERVICE_RELOAD:
2074                 case SERVICE_STOP:
2075                         /* Need to wait until the operation is
2076                          * done */
2077                         break;
2078
2079                 case SERVICE_START:
2080                         if (s->type == SERVICE_FINISH) {
2081                                 /* This was our main goal, so let's go on */
2082                                 if (success)
2083                                         service_enter_start_post(s);
2084                                 else
2085                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2086                                 break;
2087                         } else {
2088                                 assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2089
2090                                 /* Fall through */
2091                         }
2092
2093                 case SERVICE_RUNNING:
2094                         service_enter_running(s, success);
2095                         break;
2096
2097                 case SERVICE_STOP_SIGTERM:
2098                 case SERVICE_STOP_SIGKILL:
2099
2100                         if (!control_pid_good(s))
2101                                 service_enter_stop_post(s, success);
2102
2103                         /* If there is still a control process, wait for that first */
2104                         break;
2105
2106                 default:
2107                         assert_not_reached("Uh, main process died at wrong time.");
2108                 }
2109
2110         } else if (s->control_pid == pid) {
2111
2112                 if (s->control_command)
2113                         exec_status_fill(&s->control_command->exec_status, pid, code, status);
2114
2115                 s->control_pid = 0;
2116
2117                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2118
2119                 /* If we are shutting things down anyway we
2120                  * don't care about failing commands. */
2121
2122                 if (s->control_command && s->control_command->command_next && success) {
2123
2124                         /* There is another command to *
2125                          * execute, so let's do that. */
2126
2127                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
2128                         service_run_next(s, success);
2129
2130                 } else {
2131                         /* No further commands for this step, so let's
2132                          * figure out what to do next */
2133
2134                         s->control_command = NULL;
2135                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2136
2137                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2138
2139                         switch (s->state) {
2140
2141                         case SERVICE_START_PRE:
2142                                 if (success)
2143                                         service_enter_start(s);
2144                                 else
2145                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2146                                 break;
2147
2148                         case SERVICE_START:
2149                                 assert(s->type == SERVICE_FORKING);
2150
2151                                 /* Let's try to load the pid
2152                                  * file here if we can. We
2153                                  * ignore the return value,
2154                                  * since the PID file might
2155                                  * actually be created by a
2156                                  * START_POST script */
2157
2158                                 if (success) {
2159                                         if (s->pid_file)
2160                                                 service_load_pid_file(s);
2161
2162                                         service_enter_start_post(s);
2163                                 } else
2164                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2165
2166                                 break;
2167
2168                         case SERVICE_START_POST:
2169                                 if (success && s->pid_file && !s->main_pid_known) {
2170                                         int r;
2171
2172                                         /* Hmm, let's see if we can
2173                                          * load the pid now after the
2174                                          * start-post scripts got
2175                                          * executed. */
2176
2177                                         if ((r = service_load_pid_file(s)) < 0)
2178                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2179                                 }
2180
2181                                 /* Fall through */
2182
2183                         case SERVICE_RELOAD:
2184                                 if (success)
2185                                         service_enter_running(s, true);
2186                                 else
2187                                         service_enter_stop(s, false);
2188
2189                                 break;
2190
2191                         case SERVICE_STOP:
2192                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2193                                 break;
2194
2195                         case SERVICE_STOP_SIGTERM:
2196                         case SERVICE_STOP_SIGKILL:
2197                                 if (main_pid_good(s) <= 0)
2198                                         service_enter_stop_post(s, success);
2199
2200                                 /* If there is still a service
2201                                  * process around, wait until
2202                                  * that one quit, too */
2203                                 break;
2204
2205                         case SERVICE_STOP_POST:
2206                         case SERVICE_FINAL_SIGTERM:
2207                         case SERVICE_FINAL_SIGKILL:
2208                                 service_enter_dead(s, success, true);
2209                                 break;
2210
2211                         default:
2212                                 assert_not_reached("Uh, control process died at wrong time.");
2213                         }
2214                 }
2215         }
2216 }
2217
2218 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2219         Service *s = SERVICE(u);
2220
2221         assert(s);
2222         assert(elapsed == 1);
2223
2224         assert(w == &s->timer_watch);
2225
2226         switch (s->state) {
2227
2228         case SERVICE_START_PRE:
2229         case SERVICE_START:
2230                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2231                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2232                 break;
2233
2234         case SERVICE_START_POST:
2235         case SERVICE_RELOAD:
2236                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2237                 service_enter_stop(s, false);
2238                 break;
2239
2240         case SERVICE_STOP:
2241                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2242                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2243                 break;
2244
2245         case SERVICE_STOP_SIGTERM:
2246                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2247                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2248                 break;
2249
2250         case SERVICE_STOP_SIGKILL:
2251                 /* Uh, wie sent a SIGKILL and it is still not gone?
2252                  * Must be something we cannot kill, so let's just be
2253                  * weirded out and continue */
2254
2255                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2256                 service_enter_stop_post(s, false);
2257                 break;
2258
2259         case SERVICE_STOP_POST:
2260                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2261                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2262                 break;
2263
2264         case SERVICE_FINAL_SIGTERM:
2265                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2266                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2267                 break;
2268
2269         case SERVICE_FINAL_SIGKILL:
2270                 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
2271                 service_enter_dead(s, false, true);
2272                 break;
2273
2274         case SERVICE_AUTO_RESTART:
2275                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2276                 service_enter_restart(s);
2277                 break;
2278
2279         default:
2280                 assert_not_reached("Timeout at wrong time.");
2281         }
2282 }
2283
2284 static void service_cgroup_notify_event(Unit *u) {
2285         Service *s = SERVICE(u);
2286
2287         assert(u);
2288
2289         log_debug("%s: cgroup is empty", u->meta.id);
2290
2291         switch (s->state) {
2292
2293                 /* Waiting for SIGCHLD is usually more interesting,
2294                  * because it includes return codes/signals. Which is
2295                  * why we ignore the cgroup events for most cases,
2296                  * except when we don't know pid which to expect the
2297                  * SIGCHLD for. */
2298
2299         case SERVICE_RUNNING:
2300                 service_enter_running(s, true);
2301                 break;
2302
2303         default:
2304                 ;
2305         }
2306 }
2307
2308 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2309         Service *s = SERVICE(u);
2310         const char *e;
2311
2312         assert(u);
2313
2314         if (s->notify_access == NOTIFY_NONE) {
2315                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2316                             u->meta.id, (unsigned long) pid);
2317                 return;
2318         }
2319
2320         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2321                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2322                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2323                 return;
2324         }
2325
2326         log_debug("%s: Got message", u->meta.id);
2327
2328         /* Interpret MAINPID= */
2329         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2330             (s->state == SERVICE_START ||
2331              s->state == SERVICE_START_POST ||
2332              s->state == SERVICE_RUNNING ||
2333              s->state == SERVICE_RELOAD)) {
2334
2335                 if (parse_pid(e + 8, &pid) < 0)
2336                         log_warning("Failed to parse %s", e);
2337                 else {
2338                         log_debug("%s: got %s", u->meta.id, e);
2339                         service_set_main_pid(s, pid);
2340                 }
2341         }
2342
2343         /* Interpret READY= */
2344         if (s->type == SERVICE_NOTIFY &&
2345             s->state == SERVICE_START &&
2346             strv_find(tags, "READY=1")) {
2347                 log_debug("%s: got READY=1", u->meta.id);
2348
2349                 service_enter_start_post(s);
2350         }
2351
2352         /* Interpret STATUS= */
2353         if ((e = strv_find_prefix(tags, "STATUS="))) {
2354                 char *t;
2355
2356                 if (!(t = strdup(e+7))) {
2357                         log_error("Failed to allocate string.");
2358                         return;
2359                 }
2360
2361                 log_debug("%s: got %s", u->meta.id, e);
2362
2363                 free(s->status_text);
2364                 s->status_text = t;
2365         }
2366 }
2367
2368 static int service_enumerate(Manager *m) {
2369         char **p;
2370         unsigned i;
2371         DIR *d = NULL;
2372         char *path = NULL, *fpath = NULL, *name = NULL;
2373         int r;
2374
2375         assert(m);
2376
2377         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2378                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2379                         struct dirent *de;
2380
2381                         free(path);
2382                         path = NULL;
2383                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2384                                 r = -ENOMEM;
2385                                 goto finish;
2386                         }
2387
2388                         if (d)
2389                                 closedir(d);
2390
2391                         if (!(d = opendir(path))) {
2392                                 if (errno != ENOENT)
2393                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2394
2395                                 continue;
2396                         }
2397
2398                         while ((de = readdir(d))) {
2399                                 Unit *service;
2400                                 int a, b;
2401
2402                                 if (ignore_file(de->d_name))
2403                                         continue;
2404
2405                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2406                                         continue;
2407
2408                                 if (strlen(de->d_name) < 4)
2409                                         continue;
2410
2411                                 a = undecchar(de->d_name[1]);
2412                                 b = undecchar(de->d_name[2]);
2413
2414                                 if (a < 0 || b < 0)
2415                                         continue;
2416
2417                                 free(fpath);
2418                                 fpath = NULL;
2419                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2420                                         r = -ENOMEM;
2421                                         goto finish;
2422                                 }
2423
2424                                 if (access(fpath, X_OK) < 0) {
2425
2426                                         if (errno != ENOENT)
2427                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2428
2429                                         continue;
2430                                 }
2431
2432                                 free(name);
2433                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2434                                         r = -ENOMEM;
2435                                         goto finish;
2436                                 }
2437
2438                                 if ((r = manager_load_unit_prepare(m, name, NULL, &service)) < 0) {
2439                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2440                                         continue;
2441                                 }
2442
2443                                 if (de->d_name[0] == 'S' &&
2444                                     (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT))
2445                                         SERVICE(service)->sysv_start_priority =
2446                                                 MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2447
2448                                 manager_dispatch_load_queue(m);
2449                                 service = unit_follow_merge(service);
2450
2451                                 if (de->d_name[0] == 'S') {
2452                                         Unit *runlevel_target;
2453
2454                                         if ((r = manager_load_unit(m, rcnd_table[i].target, NULL, &runlevel_target)) < 0)
2455                                                 goto finish;
2456
2457                                         if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
2458                                                 goto finish;
2459
2460                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, runlevel_target, true)) < 0)
2461                                                 goto finish;
2462
2463                                 } else if (de->d_name[0] == 'K' &&
2464                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2465                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2466                                         Unit *shutdown_target;
2467
2468                                         /* We honour K links only for
2469                                          * halt/reboot. For the normal
2470                                          * runlevels we assume the
2471                                          * stop jobs will be
2472                                          * implicitly added by the
2473                                          * core logic. Also, we don't
2474                                          * really distuingish here
2475                                          * between the runlevels 0 and
2476                                          * 6 and just add them to the
2477                                          * special shutdown target. On
2478                                          * SUSE the boot.d/ runlevel
2479                                          * is also used for shutdown,
2480                                          * so we add links for that
2481                                          * too to the shutdown
2482                                          * target.*/
2483
2484                                         if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
2485                                                 goto finish;
2486
2487                                         if ((r = unit_add_dependency(service, UNIT_CONFLICTS, shutdown_target, true)) < 0)
2488                                                 goto finish;
2489
2490                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, shutdown_target, true)) < 0)
2491                                                 goto finish;
2492                                 }
2493                         }
2494                 }
2495
2496         r = 0;
2497
2498 finish:
2499         free(path);
2500         free(fpath);
2501         free(name);
2502
2503         if (d)
2504                 closedir(d);
2505
2506         return r;
2507 }
2508
2509 static void service_bus_name_owner_change(
2510                 Unit *u,
2511                 const char *name,
2512                 const char *old_owner,
2513                 const char *new_owner) {
2514
2515         Service *s = SERVICE(u);
2516
2517         assert(s);
2518         assert(name);
2519
2520         assert(streq(s->bus_name, name));
2521         assert(old_owner || new_owner);
2522
2523         if (old_owner && new_owner)
2524                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2525         else if (old_owner)
2526                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2527         else
2528                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2529
2530         s->bus_name_good = !!new_owner;
2531
2532         if (s->type == SERVICE_DBUS) {
2533
2534                 /* service_enter_running() will figure out what to
2535                  * do */
2536                 if (s->state == SERVICE_RUNNING)
2537                         service_enter_running(s, true);
2538                 else if (s->state == SERVICE_START && new_owner)
2539                         service_enter_start_post(s);
2540
2541         } else if (new_owner &&
2542                    s->main_pid <= 0 &&
2543                    (s->state == SERVICE_START ||
2544                     s->state == SERVICE_START_POST ||
2545                     s->state == SERVICE_RUNNING ||
2546                     s->state == SERVICE_RELOAD)) {
2547
2548                 /* Try to acquire PID from bus service */
2549                 log_debug("Trying to acquire PID from D-Bus name...");
2550
2551                 bus_query_pid(u->meta.manager, name);
2552         }
2553 }
2554
2555 static void service_bus_query_pid_done(
2556                 Unit *u,
2557                 const char *name,
2558                 pid_t pid) {
2559
2560         Service *s = SERVICE(u);
2561
2562         assert(s);
2563         assert(name);
2564
2565         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2566
2567         if (s->main_pid <= 0 &&
2568             (s->state == SERVICE_START ||
2569              s->state == SERVICE_START_POST ||
2570              s->state == SERVICE_RUNNING ||
2571              s->state == SERVICE_RELOAD))
2572                 service_set_main_pid(s, pid);
2573 }
2574
2575 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
2576         assert(s);
2577         assert(fd >= 0);
2578
2579         /* This is called by the socket code when instantiating a new
2580          * service for a stream socket and the socket needs to be
2581          * configured. */
2582
2583         if (s->meta.load_state != UNIT_LOADED)
2584                 return -EINVAL;
2585
2586         if (s->socket_fd >= 0)
2587                 return -EBUSY;
2588
2589         if (s->state != SERVICE_DEAD)
2590                 return -EAGAIN;
2591
2592         s->socket_fd = fd;
2593         s->got_socket_fd = true;
2594         s->socket = sock;
2595
2596         return 0;
2597 }
2598
2599 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2600         [SERVICE_DEAD] = "dead",
2601         [SERVICE_START_PRE] = "start-pre",
2602         [SERVICE_START] = "start",
2603         [SERVICE_START_POST] = "start-post",
2604         [SERVICE_RUNNING] = "running",
2605         [SERVICE_EXITED] = "exited",
2606         [SERVICE_RELOAD] = "reload",
2607         [SERVICE_STOP] = "stop",
2608         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2609         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2610         [SERVICE_STOP_POST] = "stop-post",
2611         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2612         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2613         [SERVICE_MAINTENANCE] = "maintenance",
2614         [SERVICE_AUTO_RESTART] = "auto-restart",
2615 };
2616
2617 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2618
2619 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2620         [SERVICE_ONCE] = "once",
2621         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2622         [SERVICE_RESTART_ALWAYS] = "restart-always",
2623 };
2624
2625 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2626
2627 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2628         [SERVICE_FORKING] = "forking",
2629         [SERVICE_SIMPLE] = "simple",
2630         [SERVICE_FINISH] = "finish",
2631         [SERVICE_DBUS] = "dbus",
2632         [SERVICE_NOTIFY] = "notify"
2633 };
2634
2635 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2636
2637 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2638         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2639         [SERVICE_EXEC_START] = "ExecStart",
2640         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2641         [SERVICE_EXEC_RELOAD] = "ExecReload",
2642         [SERVICE_EXEC_STOP] = "ExecStop",
2643         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2644 };
2645
2646 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2647
2648 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
2649         [NOTIFY_NONE] = "none",
2650         [NOTIFY_MAIN] = "main",
2651         [NOTIFY_ALL] = "all"
2652 };
2653
2654 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
2655
2656 const UnitVTable service_vtable = {
2657         .suffix = ".service",
2658
2659         .init = service_init,
2660         .done = service_done,
2661         .load = service_load,
2662
2663         .coldplug = service_coldplug,
2664
2665         .dump = service_dump,
2666
2667         .start = service_start,
2668         .stop = service_stop,
2669         .reload = service_reload,
2670
2671         .can_reload = service_can_reload,
2672
2673         .serialize = service_serialize,
2674         .deserialize_item = service_deserialize_item,
2675
2676         .active_state = service_active_state,
2677         .sub_state_to_string = service_sub_state_to_string,
2678
2679         .check_gc = service_check_gc,
2680         .check_snapshot = service_check_snapshot,
2681
2682         .sigchld_event = service_sigchld_event,
2683         .timer_event = service_timer_event,
2684
2685         .cgroup_notify_empty = service_cgroup_notify_event,
2686         .notify_message = service_notify_message,
2687
2688         .bus_name_owner_change = service_bus_name_owner_change,
2689         .bus_query_pid_done = service_bus_query_pid_done,
2690
2691         .bus_message_handler = bus_service_message_handler,
2692
2693         .enumerate = service_enumerate
2694 };