src/service.c

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