src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35 #include "special.h"
  36 #include "bus-errors.h"
  37 #include "exit-status.h"
  38
  39 #define COMMENTS "#;\n"
  40 #define NEWLINES "\n\r"
  41
  42 #ifdef HAVE_SYSV_COMPAT
  43
  44 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
  45
  46 typedef enum RunlevelType {
  47         RUNLEVEL_UP,
  48         RUNLEVEL_DOWN,
  49         RUNLEVEL_SYSINIT
  50 } RunlevelType;
  51
  52 static const struct {
  53         const char *path;
  54         const char *target;
  55         const RunlevelType type;
  56 } rcnd_table[] = {
  57         /* Standard SysV runlevels for start-up */
  58         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  59         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  60         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  61         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  62         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  63
  64 #ifdef TARGET_SUSE
  65         /* SUSE style boot.d */
  66         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  67 #endif
  68
  69 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_FRUGALWARE)
  70         /* Debian style rcS.d */
  71         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  72 #endif
  73
  74         /* Standard SysV runlevels for shutdown */
  75         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  76         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  77
  78         /* Note that the order here matters, as we read the
  79            directories in this order, and we want to make sure that
  80            sysv_start_priority is known when we first load the
  81            unit. And that value we only know from S links. Hence
  82            UP/SYSINIT must be read before DOWN */
  83 };
  84
  85 #define RUNLEVELS_UP "12345"
  86 /* #define RUNLEVELS_DOWN "06" */
  87 /* #define RUNLEVELS_BOOT "bBsS" */
  88 #endif
  89
  90 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  91         [SERVICE_DEAD] = UNIT_INACTIVE,
  92         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  93         [SERVICE_START] = UNIT_ACTIVATING,
  94         [SERVICE_START_POST] = UNIT_ACTIVATING,
  95         [SERVICE_RUNNING] = UNIT_ACTIVE,
  96         [SERVICE_EXITED] = UNIT_ACTIVE,
  97         [SERVICE_RELOAD] = UNIT_RELOADING,
  98         [SERVICE_STOP] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 101         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 103         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 104         [SERVICE_FAILED] = UNIT_FAILED,
 105         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 106 };
 107
 108 static void service_init(Unit *u) {
 109         Service *s = SERVICE(u);
 110
 111         assert(u);
 112         assert(u->meta.load_state == UNIT_STUB);
 113
 114         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 115         s->restart_usec = DEFAULT_RESTART_USEC;
 116         s->timer_watch.type = WATCH_INVALID;
 117 #ifdef HAVE_SYSV_COMPAT
 118         s->sysv_start_priority = -1;
 119 #endif
 120         s->socket_fd = -1;
 121
 122         exec_context_init(&s->exec_context);
 123
 124         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 125
 126         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 127 }
 128
 129 static void service_unwatch_control_pid(Service *s) {
 130         assert(s);
 131
 132         if (s->control_pid <= 0)
 133                 return;
 134
 135         unit_unwatch_pid(UNIT(s), s->control_pid);
 136         s->control_pid = 0;
 137 }
 138
 139 static void service_unwatch_main_pid(Service *s) {
 140         assert(s);
 141
 142         if (s->main_pid <= 0)
 143                 return;
 144
 145         unit_unwatch_pid(UNIT(s), s->main_pid);
 146         s->main_pid = 0;
 147 }
 148
 149 static int service_set_main_pid(Service *s, pid_t pid) {
 150         pid_t ppid;
 151
 152         assert(s);
 153
 154         if (pid <= 1)
 155                 return -EINVAL;
 156
 157         if (pid == getpid())
 158                 return -EINVAL;
 159
 160         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 161                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 162                             s->meta.id, (unsigned long) pid);
 163
 164         s->main_pid = pid;
 165         s->main_pid_known = true;
 166
 167         exec_status_start(&s->main_exec_status, pid);
 168
 169         return 0;
 170 }
 171
 172 static void service_close_socket_fd(Service *s) {
 173         assert(s);
 174
 175         if (s->socket_fd < 0)
 176                 return;
 177
 178         close_nointr_nofail(s->socket_fd);
 179         s->socket_fd = -1;
 180 }
 181
 182 static void service_connection_unref(Service *s) {
 183         assert(s);
 184
 185         if (!s->accept_socket)
 186                 return;
 187
 188         socket_connection_unref(s->accept_socket);
 189         s->accept_socket = NULL;
 190 }
 191
 192 static void service_done(Unit *u) {
 193         Service *s = SERVICE(u);
 194
 195         assert(s);
 196
 197         free(s->pid_file);
 198         s->pid_file = NULL;
 199
 200 #ifdef HAVE_SYSV_COMPAT
 201         free(s->sysv_path);
 202         s->sysv_path = NULL;
 203
 204         free(s->sysv_runlevels);
 205         s->sysv_runlevels = NULL;
 206 #endif
 207
 208         free(s->status_text);
 209         s->status_text = NULL;
 210
 211         exec_context_done(&s->exec_context);
 212         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 213         s->control_command = NULL;
 214
 215         /* This will leak a process, but at least no memory or any of
 216          * our resources */
 217         service_unwatch_main_pid(s);
 218         service_unwatch_control_pid(s);
 219
 220         if (s->bus_name)  {
 221                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 222                 free(s->bus_name);
 223                 s->bus_name = NULL;
 224         }
 225
 226         service_close_socket_fd(s);
 227         service_connection_unref(s);
 228
 229         set_free(s->configured_sockets);
 230
 231         unit_unwatch_timer(u, &s->timer_watch);
 232 }
 233
 234 #ifdef HAVE_SYSV_COMPAT
 235 static char *sysv_translate_name(const char *name) {
 236         char *r;
 237
 238         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 239                 return NULL;
 240
 241 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 242         if (endswith(name, ".sh"))
 243                 /* Drop Debian-style .sh suffix */
 244                 strcpy(stpcpy(r, name) - 3, ".service");
 245 #endif
 246 #ifdef TARGET_SUSE
 247         if (startswith(name, "boot."))
 248                 /* Drop SuSE-style boot. prefix */
 249                 strcpy(stpcpy(r, name + 5), ".service");
 250 #endif
 251 #ifdef TARGET_FRUGALWARE
 252         if (startswith(name, "rc."))
 253                 /* Drop Frugalware-style rc. prefix */
 254                 strcpy(stpcpy(r, name + 3), ".service");
 255 #endif
 256         else
 257                 /* Normal init scripts */
 258                 strcpy(stpcpy(r, name), ".service");
 259
 260         return r;
 261 }
 262
 263 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 264
 265         /* We silently ignore the $ prefix here. According to the LSB
 266          * spec it simply indicates whether something is a
 267          * standardized name or a distribution-specific one. Since we
 268          * just follow what already exists and do not introduce new
 269          * uses or names we don't care who introduced a new name. */
 270
 271         static const char * const table[] = {
 272                 /* LSB defined facilities */
 273                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 274                 "network",              SPECIAL_NETWORK_TARGET,
 275                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 276                 "portmap",              SPECIAL_RPCBIND_TARGET,
 277                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 278                 "syslog",               SPECIAL_SYSLOG_TARGET,
 279                 "time",                 SPECIAL_RTC_SET_TARGET,
 280
 281                 /* common extensions */
 282                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 283                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 284                 "null",                 NULL,
 285
 286 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 287                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 288 #endif
 289
 290 #ifdef TARGET_FEDORA
 291                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 292                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 293                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 294 #endif
 295
 296 #ifdef TARGET_SUSE
 297                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 298 #endif
 299         };
 300
 301         unsigned i;
 302         char *r;
 303         const char *n;
 304
 305         assert(name);
 306         assert(_r);
 307
 308         n = *name == '$' ? name + 1 : name;
 309
 310         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 311
 312                 if (!streq(table[i], n))
 313                         continue;
 314
 315                 if (!table[i+1])
 316                         return 0;
 317
 318                 if (!(r = strdup(table[i+1])))
 319                         return -ENOMEM;
 320
 321                 goto finish;
 322         }
 323
 324         /* If we don't know this name, fallback heuristics to figure
 325          * out whether something is a target or a service alias. */
 326
 327         if (*name == '$') {
 328                 if (!unit_prefix_is_valid(n))
 329                         return -EINVAL;
 330
 331                 /* Facilities starting with $ are most likely targets */
 332                 r = unit_name_build(n, NULL, ".target");
 333         } else if (filename && streq(name, filename))
 334                 /* Names equalling the file name of the services are redundant */
 335                 return 0;
 336         else
 337                 /* Everything else we assume to be normal service names */
 338                 r = sysv_translate_name(n);
 339
 340         if (!r)
 341                 return -ENOMEM;
 342
 343 finish:
 344
 345         if (_r)
 346                 *_r = r;
 347
 348         return 1;
 349 }
 350
 351 static int sysv_fix_order(Service *s) {
 352         Meta *other;
 353         int r;
 354
 355         assert(s);
 356
 357         if (s->sysv_start_priority < 0)
 358                 return 0;
 359
 360         /* For each pair of services where at least one lacks a LSB
 361          * header, we use the start priority value to order things. */
 362
 363         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 364                 Service *t;
 365                 UnitDependency d;
 366                 bool special_s, special_t;
 367
 368                 t = (Service*) other;
 369
 370                 if (s == t)
 371                         continue;
 372
 373                 if (t->meta.load_state != UNIT_LOADED)
 374                         continue;
 375
 376                 if (t->sysv_start_priority < 0)
 377                         continue;
 378
 379                 /* If both units have modern headers we don't care
 380                  * about the priorities */
 381                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 382                     (t->meta.fragment_path || t->sysv_has_lsb))
 383                         continue;
 384
 385                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 386                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 387
 388                 if (special_t && !special_s)
 389                         d = UNIT_AFTER;
 390                 else if (special_s && !special_t)
 391                         d = UNIT_BEFORE;
 392                 else if (t->sysv_start_priority < s->sysv_start_priority)
 393                         d = UNIT_AFTER;
 394                 else if (t->sysv_start_priority > s->sysv_start_priority)
 395                         d = UNIT_BEFORE;
 396                 else
 397                         continue;
 398
 399                 /* FIXME: Maybe we should compare the name here lexicographically? */
 400
 401                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 402                         return r;
 403         }
 404
 405         return 0;
 406 }
 407
 408 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 409         ExecCommand *c;
 410
 411         if (!(c = new0(ExecCommand, 1)))
 412                 return NULL;
 413
 414         if (!(c->path = strdup(path))) {
 415                 free(c);
 416                 return NULL;
 417         }
 418
 419         if (!(c->argv = strv_new(path, arg1, NULL))) {
 420                 free(c->path);
 421                 free(c);
 422                 return NULL;
 423         }
 424
 425         return c;
 426 }
 427
 428 static int sysv_exec_commands(Service *s) {
 429         ExecCommand *c;
 430
 431         assert(s);
 432         assert(s->sysv_path);
 433
 434         if (!(c = exec_command_new(s->sysv_path, "start")))
 435                 return -ENOMEM;
 436         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 437
 438         if (!(c = exec_command_new(s->sysv_path, "stop")))
 439                 return -ENOMEM;
 440         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 441
 442         if (!(c = exec_command_new(s->sysv_path, "reload")))
 443                 return -ENOMEM;
 444         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 445
 446         return 0;
 447 }
 448
 449 static int service_load_sysv_path(Service *s, const char *path) {
 450         FILE *f;
 451         Unit *u;
 452         unsigned line = 0;
 453         int r;
 454         enum {
 455                 NORMAL,
 456                 DESCRIPTION,
 457                 LSB,
 458                 LSB_DESCRIPTION
 459         } state = NORMAL;
 460         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 461
 462         assert(s);
 463         assert(path);
 464
 465         u = UNIT(s);
 466
 467         if (!(f = fopen(path, "re"))) {
 468                 r = errno == ENOENT ? 0 : -errno;
 469                 goto finish;
 470         }
 471
 472         free(s->sysv_path);
 473         if (!(s->sysv_path = strdup(path))) {
 474                 r = -ENOMEM;
 475                 goto finish;
 476         }
 477
 478         while (!feof(f)) {
 479                 char l[LINE_MAX], *t;
 480
 481                 if (!fgets(l, sizeof(l), f)) {
 482                         if (feof(f))
 483                                 break;
 484
 485                         r = -errno;
 486                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 487                         goto finish;
 488                 }
 489
 490                 line++;
 491
 492                 t = strstrip(l);
 493                 if (*t != '#')
 494                         continue;
 495
 496                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 497                         state = LSB;
 498                         s->sysv_has_lsb = true;
 499                         continue;
 500                 }
 501
 502                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 503                         state = NORMAL;
 504                         continue;
 505                 }
 506
 507                 t++;
 508                 t += strspn(t, WHITESPACE);
 509
 510                 if (state == NORMAL) {
 511
 512                         /* Try to parse Red Hat style chkconfig headers */
 513
 514                         if (startswith_no_case(t, "chkconfig:")) {
 515                                 int start_priority;
 516                                 char runlevels[16], *k;
 517
 518                                 state = NORMAL;
 519
 520                                 if (sscanf(t+10, "%15s %i %*i",
 521                                            runlevels,
 522                                            &start_priority) != 2) {
 523
 524                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 525                                         continue;
 526                                 }
 527
 528                                 /* A start priority gathered from the
 529                                  * symlink farms is preferred over the
 530                                  * data from the LSB header. */
 531                                 if (start_priority < 0 || start_priority > 99)
 532                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 533                                 else if (s->sysv_start_priority < 0)
 534                                         s->sysv_start_priority = start_priority;
 535
 536                                 char_array_0(runlevels);
 537                                 k = delete_chars(runlevels, WHITESPACE "-");
 538
 539                                 if (k[0]) {
 540                                         char *d;
 541
 542                                         if (!(d = strdup(k))) {
 543                                                 r = -ENOMEM;
 544                                                 goto finish;
 545                                         }
 546
 547                                         free(s->sysv_runlevels);
 548                                         s->sysv_runlevels = d;
 549                                 }
 550
 551                         } else if (startswith_no_case(t, "description:")) {
 552
 553                                 size_t k = strlen(t);
 554                                 char *d;
 555                                 const char *j;
 556
 557                                 if (t[k-1] == '\\') {
 558                                         state = DESCRIPTION;
 559                                         t[k-1] = 0;
 560                                 }
 561
 562                                 if ((j = strstrip(t+12)) && *j) {
 563                                         if (!(d = strdup(j))) {
 564                                                 r = -ENOMEM;
 565                                                 goto finish;
 566                                         }
 567                                 } else
 568                                         d = NULL;
 569
 570                                 free(chkconfig_description);
 571                                 chkconfig_description = d;
 572
 573                         } else if (startswith_no_case(t, "pidfile:")) {
 574
 575                                 char *fn;
 576
 577                                 state = NORMAL;
 578
 579                                 fn = strstrip(t+8);
 580                                 if (!path_is_absolute(fn)) {
 581                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 582                                         continue;
 583                                 }
 584
 585                                 if (!(fn = strdup(fn))) {
 586                                         r = -ENOMEM;
 587                                         goto finish;
 588                                 }
 589
 590                                 free(s->pid_file);
 591                                 s->pid_file = fn;
 592                         }
 593
 594                 } else if (state == DESCRIPTION) {
 595
 596                         /* Try to parse Red Hat style description
 597                          * continuation */
 598
 599                         size_t k = strlen(t);
 600                         char *j;
 601
 602                         if (t[k-1] == '\\')
 603                                 t[k-1] = 0;
 604                         else
 605                                 state = NORMAL;
 606
 607                         if ((j = strstrip(t)) && *j) {
 608                                 char *d = NULL;
 609
 610                                 if (chkconfig_description)
 611                                         asprintf(&d, "%s %s", chkconfig_description, j);
 612                                 else
 613                                         d = strdup(j);
 614
 615                                 if (!d) {
 616                                         r = -ENOMEM;
 617                                         goto finish;
 618                                 }
 619
 620                                 free(chkconfig_description);
 621                                 chkconfig_description = d;
 622                         }
 623
 624                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 625
 626                         if (startswith_no_case(t, "Provides:")) {
 627                                 char *i, *w;
 628                                 size_t z;
 629
 630                                 state = LSB;
 631
 632                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 633                                         char *n, *m;
 634
 635                                         if (!(n = strndup(w, z))) {
 636                                                 r = -ENOMEM;
 637                                                 goto finish;
 638                                         }
 639
 640                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 641                                         free(n);
 642
 643                                         if (r < 0)
 644                                                 goto finish;
 645
 646                                         if (r == 0)
 647                                                 continue;
 648
 649                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 650                                                 r = unit_add_name(u, m);
 651                                         else {
 652                                                 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 653
 654                                                 if (s->sysv_enabled) {
 655                                                         int k;
 656
 657                                                         if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
 658                                                                 r = k;
 659                                                 }
 660                                         }
 661
 662                                         if (r < 0)
 663                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 664
 665                                         free(m);
 666                                 }
 667
 668                         } else if (startswith_no_case(t, "Required-Start:") ||
 669                                    startswith_no_case(t, "Should-Start:") ||
 670                                    startswith_no_case(t, "X-Start-Before:") ||
 671                                    startswith_no_case(t, "X-Start-After:")) {
 672                                 char *i, *w;
 673                                 size_t z;
 674
 675                                 state = LSB;
 676
 677                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 678                                         char *n, *m;
 679
 680                                         if (!(n = strndup(w, z))) {
 681                                                 r = -ENOMEM;
 682                                                 goto finish;
 683                                         }
 684
 685                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 686
 687                                         if (r < 0) {
 688                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
 689                                                 free(n);
 690                                                 continue;
 691                                         }
 692
 693                                         free(n);
 694
 695                                         if (r == 0)
 696                                                 continue;
 697
 698                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 699
 700                                         if (r < 0)
 701                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 702
 703                                         free(m);
 704                                 }
 705                         } else if (startswith_no_case(t, "Default-Start:")) {
 706                                 char *k, *d;
 707
 708                                 state = LSB;
 709
 710                                 k = delete_chars(t+14, WHITESPACE "-");
 711
 712                                 if (k[0] != 0) {
 713                                         if (!(d = strdup(k))) {
 714                                                 r = -ENOMEM;
 715                                                 goto finish;
 716                                         }
 717
 718                                         free(s->sysv_runlevels);
 719                                         s->sysv_runlevels = d;
 720                                 }
 721
 722                         } else if (startswith_no_case(t, "Description:")) {
 723                                 char *d, *j;
 724
 725                                 state = LSB_DESCRIPTION;
 726
 727                                 if ((j = strstrip(t+12)) && *j) {
 728                                         if (!(d = strdup(j))) {
 729                                                 r = -ENOMEM;
 730                                                 goto finish;
 731                                         }
 732                                 } else
 733                                         d = NULL;
 734
 735                                 free(long_description);
 736                                 long_description = d;
 737
 738                         } else if (startswith_no_case(t, "Short-Description:")) {
 739                                 char *d, *j;
 740
 741                                 state = LSB;
 742
 743                                 if ((j = strstrip(t+18)) && *j) {
 744                                         if (!(d = strdup(j))) {
 745                                                 r = -ENOMEM;
 746                                                 goto finish;
 747                                         }
 748                                 } else
 749                                         d = NULL;
 750
 751                                 free(short_description);
 752                                 short_description = d;
 753
 754                         } else if (startswith_no_case(t, "X-Interactive:")) {
 755                                 int b;
 756
 757                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 758                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 759                                         continue;
 760                                 }
 761
 762                                 if (b)
 763                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 764                                 else
 765                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 766
 767                         } else if (state == LSB_DESCRIPTION) {
 768
 769                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 770                                         char *j;
 771
 772                                         if ((j = strstrip(t)) && *j) {
 773                                                 char *d = NULL;
 774
 775                                                 if (long_description)
 776                                                         asprintf(&d, "%s %s", long_description, t);
 777                                                 else
 778                                                         d = strdup(j);
 779
 780                                                 if (!d) {
 781                                                         r = -ENOMEM;
 782                                                         goto finish;
 783                                                 }
 784
 785                                                 free(long_description);
 786                                                 long_description = d;
 787                                         }
 788
 789                                 } else
 790                                         state = LSB;
 791                         }
 792                 }
 793         }
 794
 795         if ((r = sysv_exec_commands(s)) < 0)
 796                 goto finish;
 797
 798         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 799                 /* If there a runlevels configured for this service
 800                  * but none of the standard ones, then we assume this
 801                  * is some special kind of service (which might be
 802                  * needed for early boot) and don't create any links
 803                  * to it. */
 804
 805                 s->meta.default_dependencies = false;
 806
 807                 /* Don't timeout special services during boot (like fsck) */
 808                 s->timeout_usec = 0;
 809         } else
 810                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 811
 812         /* Special setting for all SysV services */
 813         s->type = SERVICE_FORKING;
 814         s->remain_after_exit = true;
 815         s->restart = SERVICE_RESTART_NO;
 816         s->exec_context.std_output =
 817                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 818                 ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL;
 819         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 820
 821         /* We use the long description only if
 822          * no short description is set. */
 823
 824         if (short_description)
 825                 description = short_description;
 826         else if (chkconfig_description)
 827                 description = chkconfig_description;
 828         else if (long_description)
 829                 description = long_description;
 830         else
 831                 description = NULL;
 832
 833         if (description) {
 834                 char *d;
 835
 836                 if (!(d = strappend("LSB: ", description))) {
 837                         r = -ENOMEM;
 838                         goto finish;
 839                 }
 840
 841                 u->meta.description = d;
 842         }
 843
 844         u->meta.load_state = UNIT_LOADED;
 845         r = 0;
 846
 847 finish:
 848
 849         if (f)
 850                 fclose(f);
 851
 852         free(short_description);
 853         free(long_description);
 854         free(chkconfig_description);
 855
 856         return r;
 857 }
 858
 859 static int service_load_sysv_name(Service *s, const char *name) {
 860         char **p;
 861
 862         assert(s);
 863         assert(name);
 864
 865         /* For SysV services we strip the boot.*, rc.* and *.sh
 866          * prefixes/suffixes. */
 867 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 868         if (endswith(name, ".sh.service"))
 869                 return -ENOENT;
 870 #endif
 871
 872 #ifdef TARGET_SUSE
 873         if (startswith(name, "boot."))
 874                 return -ENOENT;
 875 #endif
 876
 877 #ifdef TARGET_FRUGALWARE
 878         if (startswith(name, "rc."))
 879                 return -ENOENT;
 880 #endif
 881
 882         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 883                 char *path;
 884                 int r;
 885
 886                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 887                         return -ENOMEM;
 888
 889                 assert(endswith(path, ".service"));
 890                 path[strlen(path)-8] = 0;
 891
 892                 r = service_load_sysv_path(s, path);
 893
 894 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 895                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 896                         /* Try Debian style *.sh source'able init scripts */
 897                         strcat(path, ".sh");
 898                         r = service_load_sysv_path(s, path);
 899                 }
 900 #endif
 901                 free(path);
 902
 903 #ifdef TARGET_SUSE
 904                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 905                         /* Try SUSE style boot.* init scripts */
 906
 907                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 908                                 return -ENOMEM;
 909
 910                         /* Drop .service suffix */
 911                         path[strlen(path)-8] = 0;
 912                         r = service_load_sysv_path(s, path);
 913                         free(path);
 914                 }
 915 #endif
 916
 917 #ifdef TARGET_FRUGALWARE
 918                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 919                         /* Try Frugalware style rc.* init scripts */
 920
 921                         if (asprintf(&path, "%s/rc.%s", *p, name) < 0)
 922                                 return -ENOMEM;
 923
 924                         /* Drop .service suffix */
 925                         path[strlen(path)-8] = 0;
 926                         r = service_load_sysv_path(s, path);
 927                         free(path);
 928                 }
 929 #endif
 930
 931                 if (r < 0)
 932                         return r;
 933
 934                 if ((s->meta.load_state != UNIT_STUB))
 935                         break;
 936         }
 937
 938         return 0;
 939 }
 940
 941 static int service_load_sysv(Service *s) {
 942         const char *t;
 943         Iterator i;
 944         int r;
 945
 946         assert(s);
 947
 948         /* Load service data from SysV init scripts, preferably with
 949          * LSB headers ... */
 950
 951         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 952                 return 0;
 953
 954         if ((t = s->meta.id))
 955                 if ((r = service_load_sysv_name(s, t)) < 0)
 956                         return r;
 957
 958         if (s->meta.load_state == UNIT_STUB)
 959                 SET_FOREACH(t, s->meta.names, i) {
 960                         if (t == s->meta.id)
 961                                 continue;
 962
 963                         if ((r = service_load_sysv_name(s, t)) < 0)
 964                                 return r;
 965
 966                         if (s->meta.load_state != UNIT_STUB)
 967                                 break;
 968                 }
 969
 970         return 0;
 971 }
 972 #endif
 973
 974 static int fsck_fix_order(Service *s) {
 975         Meta *other;
 976         int r;
 977
 978         assert(s);
 979
 980         if (s->fsck_passno <= 0)
 981                 return 0;
 982
 983         /* For each pair of services where both have an fsck priority
 984          * we order things based on it. */
 985
 986         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 987                 Service *t;
 988                 UnitDependency d;
 989
 990                 t = (Service*) other;
 991
 992                 if (s == t)
 993                         continue;
 994
 995                 if (t->meta.load_state != UNIT_LOADED)
 996                         continue;
 997
 998                 if (t->fsck_passno <= 0)
 999                         continue;
1000
1001                 if (t->fsck_passno < s->fsck_passno)
1002                         d = UNIT_AFTER;
1003                 else if (t->fsck_passno > s->fsck_passno)
1004                         d = UNIT_BEFORE;
1005                 else
1006                         continue;
1007
1008                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1009                         return r;
1010         }
1011
1012         return 0;
1013 }
1014
1015 static int service_verify(Service *s) {
1016         assert(s);
1017
1018         if (s->meta.load_state != UNIT_LOADED)
1019                 return 0;
1020
1021         if (!s->exec_command[SERVICE_EXEC_START]) {
1022                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1023                 return -EINVAL;
1024         }
1025
1026         if (s->type != SERVICE_ONESHOT &&
1027             s->exec_command[SERVICE_EXEC_START]->command_next) {
1028                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1029                 return -EINVAL;
1030         }
1031
1032         if (s->type == SERVICE_DBUS && !s->bus_name) {
1033                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1034                 return -EINVAL;
1035         }
1036
1037         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1038                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1039                 return -EINVAL;
1040         }
1041
1042         return 0;
1043 }
1044
1045 static int service_add_default_dependencies(Service *s) {
1046         int r;
1047
1048         assert(s);
1049
1050         /* Add a number of automatic dependencies useful for the
1051          * majority of services. */
1052
1053         /* First, pull in base system */
1054         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1055
1056                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1057                         return r;
1058
1059         } else if (s->meta.manager->running_as == MANAGER_USER) {
1060
1061                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1062                         return r;
1063         }
1064
1065         /* Second, activate normal shutdown */
1066         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1067 }
1068
1069 static int service_load(Unit *u) {
1070         int r;
1071         Service *s = SERVICE(u);
1072
1073         assert(s);
1074
1075         /* Load a .service file */
1076         if ((r = unit_load_fragment(u)) < 0)
1077                 return r;
1078
1079 #ifdef HAVE_SYSV_COMPAT
1080         /* Load a classic init script as a fallback, if we couldn't find anything */
1081         if (u->meta.load_state == UNIT_STUB)
1082                 if ((r = service_load_sysv(s)) < 0)
1083                         return r;
1084 #endif
1085
1086         /* Still nothing found? Then let's give up */
1087         if (u->meta.load_state == UNIT_STUB)
1088                 return -ENOENT;
1089
1090         /* We were able to load something, then let's add in the
1091          * dropin directories. */
1092         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1093                 return r;
1094
1095         /* This is a new unit? Then let's add in some extras */
1096         if (u->meta.load_state == UNIT_LOADED) {
1097                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1098                         return r;
1099
1100                 if ((r = unit_add_default_cgroups(u)) < 0)
1101                         return r;
1102
1103 #ifdef HAVE_SYSV_COMPAT
1104                 if ((r = sysv_fix_order(s)) < 0)
1105                         return r;
1106 #endif
1107
1108                 if ((r = fsck_fix_order(s)) < 0)
1109                         return r;
1110
1111                 if (s->bus_name)
1112                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1113                                 return r;
1114
1115                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1116                         s->notify_access = NOTIFY_MAIN;
1117
1118                 if (s->type == SERVICE_DBUS || s->bus_name)
1119                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1120                                 return r;
1121
1122                 if (s->meta.default_dependencies)
1123                         if ((r = service_add_default_dependencies(s)) < 0)
1124                                 return r;
1125         }
1126
1127         return service_verify(s);
1128 }
1129
1130 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1131
1132         ServiceExecCommand c;
1133         Service *s = SERVICE(u);
1134         const char *prefix2;
1135         char *p2;
1136
1137         assert(s);
1138
1139         p2 = strappend(prefix, "\t");
1140         prefix2 = p2 ? p2 : prefix;
1141
1142         fprintf(f,
1143                 "%sService State: %s\n"
1144                 "%sPermissionsStartOnly: %s\n"
1145                 "%sRootDirectoryStartOnly: %s\n"
1146                 "%sRemainAfterExit: %s\n"
1147                 "%sType: %s\n"
1148                 "%sRestart: %s\n"
1149                 "%sNotifyAccess: %s\n",
1150                 prefix, service_state_to_string(s->state),
1151                 prefix, yes_no(s->permissions_start_only),
1152                 prefix, yes_no(s->root_directory_start_only),
1153                 prefix, yes_no(s->remain_after_exit),
1154                 prefix, service_type_to_string(s->type),
1155                 prefix, service_restart_to_string(s->restart),
1156                 prefix, notify_access_to_string(s->notify_access));
1157
1158         if (s->control_pid > 0)
1159                 fprintf(f,
1160                         "%sControl PID: %lu\n",
1161                         prefix, (unsigned long) s->control_pid);
1162
1163         if (s->main_pid > 0)
1164                 fprintf(f,
1165                         "%sMain PID: %lu\n",
1166                         prefix, (unsigned long) s->main_pid);
1167
1168         if (s->pid_file)
1169                 fprintf(f,
1170                         "%sPIDFile: %s\n",
1171                         prefix, s->pid_file);
1172
1173         if (s->bus_name)
1174                 fprintf(f,
1175                         "%sBusName: %s\n"
1176                         "%sBus Name Good: %s\n",
1177                         prefix, s->bus_name,
1178                         prefix, yes_no(s->bus_name_good));
1179
1180         exec_context_dump(&s->exec_context, f, prefix);
1181
1182         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1183
1184                 if (!s->exec_command[c])
1185                         continue;
1186
1187                 fprintf(f, "%s-> %s:\n",
1188                         prefix, service_exec_command_to_string(c));
1189
1190                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1191         }
1192
1193 #ifdef HAVE_SYSV_COMPAT
1194         if (s->sysv_path)
1195                 fprintf(f,
1196                         "%sSysV Init Script Path: %s\n"
1197                         "%sSysV Init Script has LSB Header: %s\n"
1198                         "%sSysVEnabled: %s\n",
1199                         prefix, s->sysv_path,
1200                         prefix, yes_no(s->sysv_has_lsb),
1201                         prefix, yes_no(s->sysv_enabled));
1202
1203         if (s->sysv_start_priority >= 0)
1204                 fprintf(f,
1205                         "%sSysVStartPriority: %i\n",
1206                         prefix, s->sysv_start_priority);
1207
1208         if (s->sysv_runlevels)
1209                 fprintf(f, "%sSysVRunLevels: %s\n",
1210                         prefix, s->sysv_runlevels);
1211 #endif
1212
1213         if (s->fsck_passno > 0)
1214                 fprintf(f,
1215                         "%sFsckPassNo: %i\n",
1216                         prefix, s->fsck_passno);
1217
1218         if (s->status_text)
1219                 fprintf(f, "%sStatus Text: %s\n",
1220                         prefix, s->status_text);
1221
1222         free(p2);
1223 }
1224
1225 static int service_load_pid_file(Service *s) {
1226         char *k;
1227         int r;
1228         pid_t pid;
1229
1230         assert(s);
1231
1232         if (s->main_pid_known)
1233                 return 0;
1234
1235         assert(s->main_pid <= 0);
1236
1237         if (!s->pid_file)
1238                 return -ENOENT;
1239
1240         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1241                 return r;
1242
1243         r = parse_pid(k, &pid);
1244         free(k);
1245
1246         if (r < 0)
1247                 return r;
1248
1249         if (kill(pid, 0) < 0 && errno != EPERM) {
1250                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1251                             (unsigned long) pid, s->pid_file);
1252                 return -ESRCH;
1253         }
1254
1255         if ((r = service_set_main_pid(s, pid)) < 0)
1256                 return r;
1257
1258         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1259                 /* FIXME: we need to do something here */
1260                 return r;
1261
1262         return 0;
1263 }
1264
1265 static int service_search_main_pid(Service *s) {
1266         pid_t pid;
1267         int r;
1268
1269         assert(s);
1270
1271         if (s->main_pid_known)
1272                 return 0;
1273
1274         assert(s->main_pid <= 0);
1275
1276         if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1277                 return -ENOENT;
1278
1279         if ((r = service_set_main_pid(s, pid)) < 0)
1280                 return r;
1281
1282         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1283                 /* FIXME: we need to do something here */
1284                 return r;
1285
1286         return 0;
1287 }
1288
1289 static int service_get_sockets(Service *s, Set **_set) {
1290         Set *set;
1291         Iterator i;
1292         char *t;
1293         int r;
1294
1295         assert(s);
1296         assert(_set);
1297
1298         if (s->socket_fd >= 0)
1299                 return 0;
1300
1301         if (!set_isempty(s->configured_sockets))
1302                 return 0;
1303
1304         /* Collects all Socket objects that belong to this
1305          * service. Note that a service might have multiple sockets
1306          * via multiple names. */
1307
1308         if (!(set = set_new(NULL, NULL)))
1309                 return -ENOMEM;
1310
1311         SET_FOREACH(t, s->meta.names, i) {
1312                 char *k;
1313                 Unit *p;
1314
1315                 /* Look for all socket objects that go by any of our
1316                  * units and collect their fds */
1317
1318                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1319                         r = -ENOMEM;
1320                         goto fail;
1321                 }
1322
1323                 p = manager_get_unit(s->meta.manager, k);
1324                 free(k);
1325
1326                 if (!p)
1327                         continue;
1328
1329                 if ((r = set_put(set, p)) < 0)
1330                         goto fail;
1331         }
1332
1333         *_set = set;
1334         return 0;
1335
1336 fail:
1337         set_free(set);
1338         return r;
1339 }
1340
1341 static int service_notify_sockets_dead(Service *s) {
1342         Iterator i;
1343         Set *set, *free_set = NULL;
1344         Socket *sock;
1345         int r;
1346
1347         assert(s);
1348
1349         /* Notifies all our sockets when we die */
1350
1351         if (s->socket_fd >= 0)
1352                 return 0;
1353
1354         if (!set_isempty(s->configured_sockets))
1355                 set = s->configured_sockets;
1356         else {
1357                 if ((r = service_get_sockets(s, &free_set)) < 0)
1358                         return r;
1359
1360                 set = free_set;
1361         }
1362
1363         SET_FOREACH(sock, set, i)
1364                 socket_notify_service_dead(sock);
1365
1366         set_free(free_set);
1367
1368         return 0;
1369 }
1370
1371 static void service_set_state(Service *s, ServiceState state) {
1372         ServiceState old_state;
1373         assert(s);
1374
1375         old_state = s->state;
1376         s->state = state;
1377
1378         if (state != SERVICE_START_PRE &&
1379             state != SERVICE_START &&
1380             state != SERVICE_START_POST &&
1381             state != SERVICE_RELOAD &&
1382             state != SERVICE_STOP &&
1383             state != SERVICE_STOP_SIGTERM &&
1384             state != SERVICE_STOP_SIGKILL &&
1385             state != SERVICE_STOP_POST &&
1386             state != SERVICE_FINAL_SIGTERM &&
1387             state != SERVICE_FINAL_SIGKILL &&
1388             state != SERVICE_AUTO_RESTART)
1389                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1390
1391         if (state != SERVICE_START &&
1392             state != SERVICE_START_POST &&
1393             state != SERVICE_RUNNING &&
1394             state != SERVICE_RELOAD &&
1395             state != SERVICE_STOP &&
1396             state != SERVICE_STOP_SIGTERM &&
1397             state != SERVICE_STOP_SIGKILL)
1398                 service_unwatch_main_pid(s);
1399
1400         if (state != SERVICE_START_PRE &&
1401             state != SERVICE_START &&
1402             state != SERVICE_START_POST &&
1403             state != SERVICE_RELOAD &&
1404             state != SERVICE_STOP &&
1405             state != SERVICE_STOP_SIGTERM &&
1406             state != SERVICE_STOP_SIGKILL &&
1407             state != SERVICE_STOP_POST &&
1408             state != SERVICE_FINAL_SIGTERM &&
1409             state != SERVICE_FINAL_SIGKILL) {
1410                 service_unwatch_control_pid(s);
1411                 s->control_command = NULL;
1412                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1413         }
1414
1415         if (state == SERVICE_DEAD ||
1416             state == SERVICE_STOP ||
1417             state == SERVICE_STOP_SIGTERM ||
1418             state == SERVICE_STOP_SIGKILL ||
1419             state == SERVICE_STOP_POST ||
1420             state == SERVICE_FINAL_SIGTERM ||
1421             state == SERVICE_FINAL_SIGKILL ||
1422             state == SERVICE_FAILED ||
1423             state == SERVICE_AUTO_RESTART)
1424                 service_notify_sockets_dead(s);
1425
1426         if (state != SERVICE_START_PRE &&
1427             state != SERVICE_START &&
1428             state != SERVICE_START_POST &&
1429             state != SERVICE_RUNNING &&
1430             state != SERVICE_RELOAD &&
1431             state != SERVICE_STOP &&
1432             state != SERVICE_STOP_SIGTERM &&
1433             state != SERVICE_STOP_SIGKILL &&
1434             state != SERVICE_STOP_POST &&
1435             state != SERVICE_FINAL_SIGTERM &&
1436             state != SERVICE_FINAL_SIGKILL &&
1437             !(state == SERVICE_DEAD && s->meta.job)) {
1438                 service_close_socket_fd(s);
1439                 service_connection_unref(s);
1440         }
1441
1442         /* For the inactive states unit_notify() will trim the cgroup,
1443          * but for exit we have to do that ourselves... */
1444         if (state == SERVICE_EXITED)
1445                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1446
1447         if (old_state != state)
1448                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1449
1450         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1451         s->reload_failure = false;
1452 }
1453
1454 static int service_coldplug(Unit *u) {
1455         Service *s = SERVICE(u);
1456         int r;
1457
1458         assert(s);
1459         assert(s->state == SERVICE_DEAD);
1460
1461         if (s->deserialized_state != s->state) {
1462
1463                 if (s->deserialized_state == SERVICE_START_PRE ||
1464                     s->deserialized_state == SERVICE_START ||
1465                     s->deserialized_state == SERVICE_START_POST ||
1466                     s->deserialized_state == SERVICE_RELOAD ||
1467                     s->deserialized_state == SERVICE_STOP ||
1468                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1469                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1470                     s->deserialized_state == SERVICE_STOP_POST ||
1471                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1472                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1473                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1474
1475                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1476                                 usec_t k;
1477
1478                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1479
1480                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1481                                         return r;
1482                         }
1483                 }
1484
1485                 if ((s->deserialized_state == SERVICE_START &&
1486                      (s->type == SERVICE_FORKING ||
1487                       s->type == SERVICE_DBUS ||
1488                       s->type == SERVICE_ONESHOT ||
1489                       s->type == SERVICE_NOTIFY)) ||
1490                     s->deserialized_state == SERVICE_START_POST ||
1491                     s->deserialized_state == SERVICE_RUNNING ||
1492                     s->deserialized_state == SERVICE_RELOAD ||
1493                     s->deserialized_state == SERVICE_STOP ||
1494                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1495                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1496                         if (s->main_pid > 0)
1497                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1498                                         return r;
1499
1500                 if (s->deserialized_state == SERVICE_START_PRE ||
1501                     s->deserialized_state == SERVICE_START ||
1502                     s->deserialized_state == SERVICE_START_POST ||
1503                     s->deserialized_state == SERVICE_RELOAD ||
1504                     s->deserialized_state == SERVICE_STOP ||
1505                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1506                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1507                     s->deserialized_state == SERVICE_STOP_POST ||
1508                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1509                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1510                         if (s->control_pid > 0)
1511                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1512                                         return r;
1513
1514                 service_set_state(s, s->deserialized_state);
1515         }
1516
1517         return 0;
1518 }
1519
1520 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1521         Iterator i;
1522         int r;
1523         int *rfds = NULL;
1524         unsigned rn_fds = 0;
1525         Set *set, *free_set = NULL;
1526         Socket *sock;
1527
1528         assert(s);
1529         assert(fds);
1530         assert(n_fds);
1531
1532         if (s->socket_fd >= 0)
1533                 return 0;
1534
1535         if (!set_isempty(s->configured_sockets))
1536                 set = s->configured_sockets;
1537         else {
1538                 if ((r = service_get_sockets(s, &free_set)) < 0)
1539                         return r;
1540
1541                 set = free_set;
1542         }
1543
1544         SET_FOREACH(sock, set, i) {
1545                 int *cfds;
1546                 unsigned cn_fds;
1547
1548                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1549                         goto fail;
1550
1551                 if (!cfds)
1552                         continue;
1553
1554                 if (!rfds) {
1555                         rfds = cfds;
1556                         rn_fds = cn_fds;
1557                 } else {
1558                         int *t;
1559
1560                         if (!(t = new(int, rn_fds+cn_fds))) {
1561                                 free(cfds);
1562                                 r = -ENOMEM;
1563                                 goto fail;
1564                         }
1565
1566                         memcpy(t, rfds, rn_fds);
1567                         memcpy(t+rn_fds, cfds, cn_fds);
1568                         free(rfds);
1569                         free(cfds);
1570
1571                         rfds = t;
1572                         rn_fds = rn_fds+cn_fds;
1573                 }
1574         }
1575
1576         *fds = rfds;
1577         *n_fds = rn_fds;
1578
1579         set_free(free_set);
1580
1581         return 0;
1582
1583 fail:
1584         set_free(set);
1585         free(rfds);
1586
1587         return r;
1588 }
1589
1590 static int service_spawn(
1591                 Service *s,
1592                 ExecCommand *c,
1593                 bool timeout,
1594                 bool pass_fds,
1595                 bool apply_permissions,
1596                 bool apply_chroot,
1597                 bool apply_tty_stdin,
1598                 bool set_notify_socket,
1599                 pid_t *_pid) {
1600
1601         pid_t pid;
1602         int r;
1603         int *fds = NULL, *fdsbuf = NULL;
1604         unsigned n_fds = 0, n_env = 0;
1605         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1606
1607         assert(s);
1608         assert(c);
1609         assert(_pid);
1610
1611         if (pass_fds ||
1612             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1613             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1614             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1615
1616                 if (s->socket_fd >= 0) {
1617                         fds = &s->socket_fd;
1618                         n_fds = 1;
1619                 } else {
1620                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1621                                 goto fail;
1622
1623                         fds = fdsbuf;
1624                 }
1625         }
1626
1627         if (timeout && s->timeout_usec) {
1628                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1629                         goto fail;
1630         } else
1631                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1632
1633         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1634                 r = -ENOMEM;
1635                 goto fail;
1636         }
1637
1638         if (!(our_env = new0(char*, 4))) {
1639                 r = -ENOMEM;
1640                 goto fail;
1641         }
1642
1643         if (set_notify_socket)
1644                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1645                         r = -ENOMEM;
1646                         goto fail;
1647                 }
1648
1649         if (s->main_pid > 0)
1650                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1651                         r = -ENOMEM;
1652                         goto fail;
1653                 }
1654
1655         if (!(final_env = strv_env_merge(2,
1656                                          s->meta.manager->environment,
1657                                          our_env,
1658                                          NULL))) {
1659                 r = -ENOMEM;
1660                 goto fail;
1661         }
1662
1663         r = exec_spawn(c,
1664                        argv,
1665                        &s->exec_context,
1666                        fds, n_fds,
1667                        final_env,
1668                        apply_permissions,
1669                        apply_chroot,
1670                        apply_tty_stdin,
1671                        s->meta.manager->confirm_spawn,
1672                        s->meta.cgroup_bondings,
1673                        &pid);
1674
1675         if (r < 0)
1676                 goto fail;
1677
1678
1679         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1680                 /* FIXME: we need to do something here */
1681                 goto fail;
1682
1683         free(fdsbuf);
1684         strv_free(argv);
1685         strv_free(our_env);
1686         strv_free(final_env);
1687
1688         *_pid = pid;
1689
1690         return 0;
1691
1692 fail:
1693         free(fdsbuf);
1694         strv_free(argv);
1695         strv_free(our_env);
1696         strv_free(final_env);
1697
1698         if (timeout)
1699                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1700
1701         return r;
1702 }
1703
1704 static int main_pid_good(Service *s) {
1705         assert(s);
1706
1707         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1708          * don't know */
1709
1710         /* If we know the pid file, then lets just check if it is
1711          * still valid */
1712         if (s->main_pid_known)
1713                 return s->main_pid > 0;
1714
1715         /* We don't know the pid */
1716         return -EAGAIN;
1717 }
1718
1719 static int control_pid_good(Service *s) {
1720         assert(s);
1721
1722         return s->control_pid > 0;
1723 }
1724
1725 static int cgroup_good(Service *s) {
1726         int r;
1727
1728         assert(s);
1729
1730         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1731                 return r;
1732
1733         return !r;
1734 }
1735
1736 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1737         int r;
1738         assert(s);
1739
1740         if (!success)
1741                 s->failure = true;
1742
1743         if (allow_restart &&
1744             !s->forbid_restart &&
1745             (s->restart == SERVICE_RESTART_ALWAYS ||
1746              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1747              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1748              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1749               (s->main_exec_status.code == CLD_KILLED ||
1750                s->main_exec_status.code == CLD_DUMPED)))) {
1751
1752                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1753                         goto fail;
1754
1755                 service_set_state(s, SERVICE_AUTO_RESTART);
1756         } else
1757                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1758
1759         s->forbid_restart = false;
1760
1761         return;
1762
1763 fail:
1764         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1765         service_enter_dead(s, false, false);
1766 }
1767
1768 static void service_enter_signal(Service *s, ServiceState state, bool success);
1769
1770 static void service_enter_stop_post(Service *s, bool success) {
1771         int r;
1772         assert(s);
1773
1774         if (!success)
1775                 s->failure = true;
1776
1777         service_unwatch_control_pid(s);
1778
1779         s->control_command_id = SERVICE_EXEC_STOP_POST;
1780         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1781                 if ((r = service_spawn(s,
1782                                        s->control_command,
1783                                        true,
1784                                        false,
1785                                        !s->permissions_start_only,
1786                                        !s->root_directory_start_only,
1787                                        true,
1788                                        false,
1789                                        &s->control_pid)) < 0)
1790                         goto fail;
1791
1792
1793                 service_set_state(s, SERVICE_STOP_POST);
1794         } else
1795                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1796
1797         return;
1798
1799 fail:
1800         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1801         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1802 }
1803
1804 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1805         int r;
1806         Set *pid_set = NULL;
1807         bool wait_for_exit = false;
1808
1809         assert(s);
1810
1811         if (!success)
1812                 s->failure = true;
1813
1814         if (s->exec_context.kill_mode != KILL_NONE) {
1815                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1816
1817                 if (s->main_pid > 0) {
1818                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1819                                  -s->main_pid :
1820                                  s->main_pid, sig) < 0 && errno != ESRCH)
1821
1822                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1823                         else
1824                                 wait_for_exit = true;
1825                 }
1826
1827                 if (s->control_pid > 0) {
1828                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1829                                  -s->control_pid :
1830                                  s->control_pid, sig) < 0 && errno != ESRCH)
1831
1832                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1833                         else
1834                                 wait_for_exit = true;
1835                 }
1836
1837                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1838
1839                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1840                                 r = -ENOMEM;
1841                                 goto fail;
1842                         }
1843
1844                         /* Exclude the main/control pids from being killed via the cgroup */
1845                         if (s->main_pid > 0)
1846                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1847                                         goto fail;
1848
1849                         if (s->control_pid > 0)
1850                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1851                                         goto fail;
1852
1853                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1854                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1855                                         log_warning("Failed to kill control group: %s", strerror(-r));
1856                         } else if (r > 0)
1857                                 wait_for_exit = true;
1858
1859                         set_free(pid_set);
1860                 }
1861         }
1862
1863         if (wait_for_exit) {
1864                 if (s->timeout_usec > 0)
1865                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1866                                 goto fail;
1867
1868                 service_set_state(s, state);
1869         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1870                 service_enter_stop_post(s, true);
1871         else
1872                 service_enter_dead(s, true, true);
1873
1874         return;
1875
1876 fail:
1877         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1878
1879         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1880                 service_enter_stop_post(s, false);
1881         else
1882                 service_enter_dead(s, false, true);
1883
1884         if (pid_set)
1885                 set_free(pid_set);
1886 }
1887
1888 static void service_enter_stop(Service *s, bool success) {
1889         int r;
1890
1891         assert(s);
1892
1893         if (!success)
1894                 s->failure = true;
1895
1896         service_unwatch_control_pid(s);
1897
1898         s->control_command_id = SERVICE_EXEC_STOP;
1899         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1900                 if ((r = service_spawn(s,
1901                                        s->control_command,
1902                                        true,
1903                                        false,
1904                                        !s->permissions_start_only,
1905                                        !s->root_directory_start_only,
1906                                        false,
1907                                        false,
1908                                        &s->control_pid)) < 0)
1909                         goto fail;
1910
1911                 service_set_state(s, SERVICE_STOP);
1912         } else
1913                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1914
1915         return;
1916
1917 fail:
1918         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1919         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1920 }
1921
1922 static void service_enter_running(Service *s, bool success) {
1923         int main_pid_ok, cgroup_ok;
1924         assert(s);
1925
1926         if (!success)
1927                 s->failure = true;
1928
1929         main_pid_ok = main_pid_good(s);
1930         cgroup_ok = cgroup_good(s);
1931
1932         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1933             (s->bus_name_good || s->type != SERVICE_DBUS))
1934                 service_set_state(s, SERVICE_RUNNING);
1935         else if (s->remain_after_exit)
1936                 service_set_state(s, SERVICE_EXITED);
1937         else
1938                 service_enter_stop(s, true);
1939 }
1940
1941 static void service_enter_start_post(Service *s) {
1942         int r;
1943         assert(s);
1944
1945         service_unwatch_control_pid(s);
1946
1947         s->control_command_id = SERVICE_EXEC_START_POST;
1948         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1949                 if ((r = service_spawn(s,
1950                                        s->control_command,
1951                                        true,
1952                                        false,
1953                                        !s->permissions_start_only,
1954                                        !s->root_directory_start_only,
1955                                        false,
1956                                        false,
1957                                        &s->control_pid)) < 0)
1958                         goto fail;
1959
1960                 service_set_state(s, SERVICE_START_POST);
1961         } else
1962                 service_enter_running(s, true);
1963
1964         return;
1965
1966 fail:
1967         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1968         service_enter_stop(s, false);
1969 }
1970
1971 static void service_enter_start(Service *s) {
1972         pid_t pid;
1973         int r;
1974
1975         assert(s);
1976
1977         assert(s->exec_command[SERVICE_EXEC_START]);
1978         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1979
1980         if (s->type == SERVICE_FORKING)
1981                 service_unwatch_control_pid(s);
1982         else
1983                 service_unwatch_main_pid(s);
1984
1985         s->control_command_id = SERVICE_EXEC_START;
1986         s->control_command = s->exec_command[SERVICE_EXEC_START];
1987
1988         if ((r = service_spawn(s,
1989                                s->control_command,
1990                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1991                                true,
1992                                true,
1993                                true,
1994                                true,
1995                                s->notify_access != NOTIFY_NONE,
1996                                &pid)) < 0)
1997                 goto fail;
1998
1999         if (s->type == SERVICE_SIMPLE) {
2000                 /* For simple services we immediately start
2001                  * the START_POST binaries. */
2002
2003                 service_set_main_pid(s, pid);
2004                 service_enter_start_post(s);
2005
2006         } else  if (s->type == SERVICE_FORKING) {
2007
2008                 /* For forking services we wait until the start
2009                  * process exited. */
2010
2011                 s->control_pid = pid;
2012                 service_set_state(s, SERVICE_START);
2013
2014         } else if (s->type == SERVICE_ONESHOT ||
2015                    s->type == SERVICE_DBUS ||
2016                    s->type == SERVICE_NOTIFY) {
2017
2018                 /* For oneshot services we wait until the start
2019                  * process exited, too, but it is our main process. */
2020
2021                 /* For D-Bus services we know the main pid right away,
2022                  * but wait for the bus name to appear on the
2023                  * bus. Notify services are similar. */
2024
2025                 service_set_main_pid(s, pid);
2026                 service_set_state(s, SERVICE_START);
2027         } else
2028                 assert_not_reached("Unknown service type");
2029
2030         return;
2031
2032 fail:
2033         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2034         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2035 }
2036
2037 static void service_enter_start_pre(Service *s) {
2038         int r;
2039
2040         assert(s);
2041
2042         service_unwatch_control_pid(s);
2043
2044         s->control_command_id = SERVICE_EXEC_START_PRE;
2045         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2046                 if ((r = service_spawn(s,
2047                                        s->control_command,
2048                                        true,
2049                                        false,
2050                                        !s->permissions_start_only,
2051                                        !s->root_directory_start_only,
2052                                        true,
2053                                        false,
2054                                        &s->control_pid)) < 0)
2055                         goto fail;
2056
2057                 service_set_state(s, SERVICE_START_PRE);
2058         } else
2059                 service_enter_start(s);
2060
2061         return;
2062
2063 fail:
2064         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2065         service_enter_dead(s, false, true);
2066 }
2067
2068 static void service_enter_restart(Service *s) {
2069         int r;
2070         DBusError error;
2071
2072         assert(s);
2073         dbus_error_init(&error);
2074
2075         if (s->meta.job) {
2076                 log_info("Job pending for unit, delaying automatic restart.");
2077
2078                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2079                         goto fail;
2080         }
2081
2082         service_enter_dead(s, true, false);
2083
2084         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2085                 goto fail;
2086
2087         log_debug("%s scheduled restart job.", s->meta.id);
2088         return;
2089
2090 fail:
2091         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2092         service_enter_dead(s, false, false);
2093
2094         dbus_error_free(&error);
2095 }
2096
2097 static void service_enter_reload(Service *s) {
2098         int r;
2099
2100         assert(s);
2101
2102         service_unwatch_control_pid(s);
2103
2104         s->control_command_id = SERVICE_EXEC_RELOAD;
2105         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2106                 if ((r = service_spawn(s,
2107                                        s->control_command,
2108                                        true,
2109                                        false,
2110                                        !s->permissions_start_only,
2111                                        !s->root_directory_start_only,
2112                                        false,
2113                                        false,
2114                                        &s->control_pid)) < 0)
2115                         goto fail;
2116
2117                 service_set_state(s, SERVICE_RELOAD);
2118         } else
2119                 service_enter_running(s, true);
2120
2121         return;
2122
2123 fail:
2124         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2125         s->reload_failure = true;
2126         service_enter_running(s, true);
2127 }
2128
2129 static void service_run_next_control(Service *s, bool success) {
2130         int r;
2131
2132         assert(s);
2133         assert(s->control_command);
2134         assert(s->control_command->command_next);
2135
2136         if (!success)
2137                 s->failure = true;
2138
2139         assert(s->control_command_id != SERVICE_EXEC_START);
2140
2141         s->control_command = s->control_command->command_next;
2142         service_unwatch_control_pid(s);
2143
2144         if ((r = service_spawn(s,
2145                                s->control_command,
2146                                true,
2147                                false,
2148                                !s->permissions_start_only,
2149                                !s->root_directory_start_only,
2150                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2151                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2152                                false,
2153                                &s->control_pid)) < 0)
2154                 goto fail;
2155
2156         return;
2157
2158 fail:
2159         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2160
2161         if (s->state == SERVICE_START_PRE)
2162                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2163         else if (s->state == SERVICE_STOP)
2164                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2165         else if (s->state == SERVICE_STOP_POST)
2166                 service_enter_dead(s, false, true);
2167         else if (s->state == SERVICE_RELOAD) {
2168                 s->reload_failure = true;
2169                 service_enter_running(s, true);
2170         } else
2171                 service_enter_stop(s, false);
2172 }
2173
2174 static void service_run_next_main(Service *s, bool success) {
2175         pid_t pid;
2176         int r;
2177
2178         assert(s);
2179         assert(s->control_command);
2180         assert(s->control_command->command_next);
2181
2182         if (!success)
2183                 s->failure = true;
2184
2185         assert(s->control_command_id == SERVICE_EXEC_START);
2186         assert(s->type == SERVICE_ONESHOT);
2187
2188         s->control_command = s->control_command->command_next;
2189         service_unwatch_main_pid(s);
2190
2191         if ((r = service_spawn(s,
2192                                s->control_command,
2193                                false,
2194                                true,
2195                                true,
2196                                true,
2197                                true,
2198                                s->notify_access != NOTIFY_NONE,
2199                                &pid)) < 0)
2200                 goto fail;
2201
2202         service_set_main_pid(s, pid);
2203
2204         return;
2205
2206 fail:
2207         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2208         service_enter_stop(s, false);
2209 }
2210
2211 static int service_start(Unit *u) {
2212         Service *s = SERVICE(u);
2213
2214         assert(s);
2215
2216         /* We cannot fulfill this request right now, try again later
2217          * please! */
2218         if (s->state == SERVICE_STOP ||
2219             s->state == SERVICE_STOP_SIGTERM ||
2220             s->state == SERVICE_STOP_SIGKILL ||
2221             s->state == SERVICE_STOP_POST ||
2222             s->state == SERVICE_FINAL_SIGTERM ||
2223             s->state == SERVICE_FINAL_SIGKILL)
2224                 return -EAGAIN;
2225
2226         /* Already on it! */
2227         if (s->state == SERVICE_START_PRE ||
2228             s->state == SERVICE_START ||
2229             s->state == SERVICE_START_POST)
2230                 return 0;
2231
2232         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2233
2234         /* Make sure we don't enter a busy loop of some kind. */
2235         if (!ratelimit_test(&s->ratelimit)) {
2236                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2237                 return -ECANCELED;
2238         }
2239
2240         s->failure = false;
2241         s->main_pid_known = false;
2242         s->forbid_restart = false;
2243
2244         service_enter_start_pre(s);
2245         return 0;
2246 }
2247
2248 static int service_stop(Unit *u) {
2249         Service *s = SERVICE(u);
2250
2251         assert(s);
2252
2253         /* This is a user request, so don't do restarts on this
2254          * shutdown. */
2255         s->forbid_restart = true;
2256
2257         /* Already on it */
2258         if (s->state == SERVICE_STOP ||
2259             s->state == SERVICE_STOP_SIGTERM ||
2260             s->state == SERVICE_STOP_SIGKILL ||
2261             s->state == SERVICE_STOP_POST ||
2262             s->state == SERVICE_FINAL_SIGTERM ||
2263             s->state == SERVICE_FINAL_SIGKILL)
2264                 return 0;
2265
2266         /* Don't allow a restart */
2267         if (s->state == SERVICE_AUTO_RESTART) {
2268                 service_set_state(s, SERVICE_DEAD);
2269                 return 0;
2270         }
2271
2272         /* If there's already something running we go directly into
2273          * kill mode. */
2274         if (s->state == SERVICE_START_PRE ||
2275             s->state == SERVICE_START ||
2276             s->state == SERVICE_START_POST ||
2277             s->state == SERVICE_RELOAD) {
2278                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2279                 return 0;
2280         }
2281
2282         assert(s->state == SERVICE_RUNNING ||
2283                s->state == SERVICE_EXITED);
2284
2285         service_enter_stop(s, true);
2286         return 0;
2287 }
2288
2289 static int service_reload(Unit *u) {
2290         Service *s = SERVICE(u);
2291
2292         assert(s);
2293
2294         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2295
2296         service_enter_reload(s);
2297         return 0;
2298 }
2299
2300 static bool service_can_reload(Unit *u) {
2301         Service *s = SERVICE(u);
2302
2303         assert(s);
2304
2305         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2306 }
2307
2308 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2309         Service *s = SERVICE(u);
2310
2311         assert(u);
2312         assert(f);
2313         assert(fds);
2314
2315         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2316         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2317
2318         if (s->control_pid > 0)
2319                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2320
2321         if (s->main_pid_known && s->main_pid > 0)
2322                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2323
2324         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2325
2326         if (s->status_text)
2327                 unit_serialize_item(u, f, "status-text", s->status_text);
2328
2329         /* There's a minor uncleanliness here: if there are multiple
2330          * commands attached here, we will start from the first one
2331          * again */
2332         if (s->control_command_id >= 0)
2333                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2334
2335         if (s->socket_fd >= 0) {
2336                 int copy;
2337
2338                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2339                         return copy;
2340
2341                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2342         }
2343
2344         if (s->main_exec_status.pid > 0) {
2345                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2346                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2347                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2348
2349                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2350                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2351                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2352                 }
2353         }
2354
2355         return 0;
2356 }
2357
2358 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2359         Service *s = SERVICE(u);
2360
2361         assert(u);
2362         assert(key);
2363         assert(value);
2364         assert(fds);
2365
2366         if (streq(key, "state")) {
2367                 ServiceState state;
2368
2369                 if ((state = service_state_from_string(value)) < 0)
2370                         log_debug("Failed to parse state value %s", value);
2371                 else
2372                         s->deserialized_state = state;
2373         } else if (streq(key, "failure")) {
2374                 int b;
2375
2376                 if ((b = parse_boolean(value)) < 0)
2377                         log_debug("Failed to parse failure value %s", value);
2378                 else
2379                         s->failure = b || s->failure;
2380         } else if (streq(key, "control-pid")) {
2381                 pid_t pid;
2382
2383                 if (parse_pid(value, &pid) < 0)
2384                         log_debug("Failed to parse control-pid value %s", value);
2385                 else
2386                         s->control_pid = pid;
2387         } else if (streq(key, "main-pid")) {
2388                 pid_t pid;
2389
2390                 if (parse_pid(value, &pid) < 0)
2391                         log_debug("Failed to parse main-pid value %s", value);
2392                 else
2393                         service_set_main_pid(s, (pid_t) pid);
2394         } else if (streq(key, "main-pid-known")) {
2395                 int b;
2396
2397                 if ((b = parse_boolean(value)) < 0)
2398                         log_debug("Failed to parse main-pid-known value %s", value);
2399                 else
2400                         s->main_pid_known = b;
2401         } else if (streq(key, "status-text")) {
2402                 char *t;
2403
2404                 if ((t = strdup(value))) {
2405                         free(s->status_text);
2406                         s->status_text = t;
2407                 }
2408
2409         } else if (streq(key, "control-command")) {
2410                 ServiceExecCommand id;
2411
2412                 if ((id = service_exec_command_from_string(value)) < 0)
2413                         log_debug("Failed to parse exec-command value %s", value);
2414                 else {
2415                         s->control_command_id = id;
2416                         s->control_command = s->exec_command[id];
2417                 }
2418         } else if (streq(key, "socket-fd")) {
2419                 int fd;
2420
2421                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2422                         log_debug("Failed to parse socket-fd value %s", value);
2423                 else {
2424
2425                         if (s->socket_fd >= 0)
2426                                 close_nointr_nofail(s->socket_fd);
2427                         s->socket_fd = fdset_remove(fds, fd);
2428                 }
2429         } else if (streq(key, "main-exec-status-pid")) {
2430                 pid_t pid;
2431
2432                 if (parse_pid(value, &pid) < 0)
2433                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2434                 else
2435                         s->main_exec_status.pid = pid;
2436         } else if (streq(key, "main-exec-status-code")) {
2437                 int i;
2438
2439                 if (safe_atoi(value, &i) < 0)
2440                         log_debug("Failed to parse main-exec-status-code value %s", value);
2441                 else
2442                         s->main_exec_status.code = i;
2443         } else if (streq(key, "main-exec-status-status")) {
2444                 int i;
2445
2446                 if (safe_atoi(value, &i) < 0)
2447                         log_debug("Failed to parse main-exec-status-status value %s", value);
2448                 else
2449                         s->main_exec_status.status = i;
2450         } else if (streq(key, "main-exec-status-start"))
2451                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2452         else if (streq(key, "main-exec-status-exit"))
2453                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2454         else
2455                 log_debug("Unknown serialization key '%s'", key);
2456
2457         return 0;
2458 }
2459
2460 static UnitActiveState service_active_state(Unit *u) {
2461         assert(u);
2462
2463         return state_translation_table[SERVICE(u)->state];
2464 }
2465
2466 static const char *service_sub_state_to_string(Unit *u) {
2467         assert(u);
2468
2469         return service_state_to_string(SERVICE(u)->state);
2470 }
2471
2472 #ifdef HAVE_SYSV_COMPAT
2473 static bool service_check_gc(Unit *u) {
2474         Service *s = SERVICE(u);
2475
2476         assert(s);
2477
2478         return !!s->sysv_path;
2479 }
2480 #endif
2481
2482 static bool service_check_snapshot(Unit *u) {
2483         Service *s = SERVICE(u);
2484
2485         assert(s);
2486
2487         return !s->got_socket_fd;
2488 }
2489
2490 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2491         Service *s = SERVICE(u);
2492         bool success;
2493
2494         assert(s);
2495         assert(pid >= 0);
2496
2497         if (!s->meta.fragment_path)
2498                 success = is_clean_exit_lsb(code, status);
2499         else
2500                 success = is_clean_exit(code, status);
2501
2502         if (s->main_pid == pid) {
2503
2504                 s->main_pid = 0;
2505                 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2506
2507                 if (s->type != SERVICE_FORKING && s->control_command) {
2508                         s->control_command->exec_status = s->main_exec_status;
2509
2510                         if (s->control_command->ignore)
2511                                 success = true;
2512                 }
2513
2514                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2515                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2516                 s->failure = s->failure || !success;
2517
2518                 if (s->control_command &&
2519                     s->control_command->command_next &&
2520                     success) {
2521
2522                         /* There is another command to *
2523                          * execute, so let's do that. */
2524
2525                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2526                         service_run_next_main(s, success);
2527
2528                 } else {
2529
2530                         /* The service exited, so the service is officially
2531                          * gone. */
2532
2533                         s->control_command = NULL;
2534                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2535
2536                         switch (s->state) {
2537
2538                         case SERVICE_START_POST:
2539                         case SERVICE_RELOAD:
2540                         case SERVICE_STOP:
2541                                 /* Need to wait until the operation is
2542                                  * done */
2543                                 break;
2544
2545                         case SERVICE_START:
2546                                 if (s->type == SERVICE_ONESHOT) {
2547                                         /* This was our main goal, so let's go on */
2548                                         if (success)
2549                                                 service_enter_start_post(s);
2550                                         else
2551                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2552                                         break;
2553                                 } else {
2554                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2555
2556                                         /* Fall through */
2557                                 }
2558
2559                         case SERVICE_RUNNING:
2560                                 service_enter_running(s, success);
2561                                 break;
2562
2563                         case SERVICE_STOP_SIGTERM:
2564                         case SERVICE_STOP_SIGKILL:
2565
2566                                 if (!control_pid_good(s))
2567                                         service_enter_stop_post(s, success);
2568
2569                                 /* If there is still a control process, wait for that first */
2570                                 break;
2571
2572                         default:
2573                                 assert_not_reached("Uh, main process died at wrong time.");
2574                         }
2575                 }
2576
2577         } else if (s->control_pid == pid) {
2578
2579                 s->control_pid = 0;
2580
2581                 if (s->control_command) {
2582                         exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2583
2584                         if (s->control_command->ignore)
2585                                 success = true;
2586                 }
2587
2588                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2589                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2590                 s->failure = s->failure || !success;
2591
2592                 if (s->control_command &&
2593                     s->control_command->command_next &&
2594                     success) {
2595
2596                         /* There is another command to *
2597                          * execute, so let's do that. */
2598
2599                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2600                         service_run_next_control(s, success);
2601
2602                 } else {
2603                         /* No further commands for this step, so let's
2604                          * figure out what to do next */
2605
2606                         s->control_command = NULL;
2607                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2608
2609                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2610
2611                         switch (s->state) {
2612
2613                         case SERVICE_START_PRE:
2614                                 if (success)
2615                                         service_enter_start(s);
2616                                 else
2617                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2618                                 break;
2619
2620                         case SERVICE_START:
2621                                 assert(s->type == SERVICE_FORKING);
2622
2623                                 /* Let's try to load the pid
2624                                  * file here if we can. We
2625                                  * ignore the return value,
2626                                  * since the PID file might
2627                                  * actually be created by a
2628                                  * START_POST script */
2629
2630                                 if (success) {
2631                                         service_load_pid_file(s);
2632                                         service_search_main_pid(s);
2633
2634                                         service_enter_start_post(s);
2635                                 } else
2636                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2637
2638                                 break;
2639
2640                         case SERVICE_START_POST:
2641                                 if (success && s->pid_file && !s->main_pid_known) {
2642                                         int r;
2643
2644                                         /* Hmm, let's see if we can
2645                                          * load the pid now after the
2646                                          * start-post scripts got
2647                                          * executed. */
2648
2649                                         if ((r = service_load_pid_file(s)) < 0)
2650                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2651                                 }
2652
2653                                 /* Fall through */
2654
2655                         case SERVICE_RELOAD:
2656                                 s->reload_failure = !success;
2657                                 service_enter_running(s, true);
2658                                 break;
2659
2660                         case SERVICE_STOP:
2661                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2662                                 break;
2663
2664                         case SERVICE_STOP_SIGTERM:
2665                         case SERVICE_STOP_SIGKILL:
2666                                 if (main_pid_good(s) <= 0)
2667                                         service_enter_stop_post(s, success);
2668
2669                                 /* If there is still a service
2670                                  * process around, wait until
2671                                  * that one quit, too */
2672                                 break;
2673
2674                         case SERVICE_STOP_POST:
2675                         case SERVICE_FINAL_SIGTERM:
2676                         case SERVICE_FINAL_SIGKILL:
2677                                 service_enter_dead(s, success, true);
2678                                 break;
2679
2680                         default:
2681                                 assert_not_reached("Uh, control process died at wrong time.");
2682                         }
2683                 }
2684         }
2685
2686         /* Notify clients about changed exit status */
2687         unit_add_to_dbus_queue(u);
2688 }
2689
2690 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2691         Service *s = SERVICE(u);
2692
2693         assert(s);
2694         assert(elapsed == 1);
2695
2696         assert(w == &s->timer_watch);
2697
2698         switch (s->state) {
2699
2700         case SERVICE_START_PRE:
2701         case SERVICE_START:
2702                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2703                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2704                 break;
2705
2706         case SERVICE_START_POST:
2707                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2708                 service_enter_stop(s, false);
2709                 break;
2710
2711         case SERVICE_RELOAD:
2712                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2713                 s->reload_failure = true;
2714                 service_enter_running(s, true);
2715                 break;
2716
2717         case SERVICE_STOP:
2718                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2719                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2720                 break;
2721
2722         case SERVICE_STOP_SIGTERM:
2723                 if (s->exec_context.send_sigkill) {
2724                         log_warning("%s stopping timed out. Killing.", u->meta.id);
2725                         service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2726                 } else {
2727                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2728                         service_enter_stop_post(s, false);
2729                 }
2730
2731                 break;
2732
2733         case SERVICE_STOP_SIGKILL:
2734                 /* Uh, wie sent a SIGKILL and it is still not gone?
2735                  * Must be something we cannot kill, so let's just be
2736                  * weirded out and continue */
2737
2738                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2739                 service_enter_stop_post(s, false);
2740                 break;
2741
2742         case SERVICE_STOP_POST:
2743                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2744                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2745                 break;
2746
2747         case SERVICE_FINAL_SIGTERM:
2748                 if (s->exec_context.send_sigkill) {
2749                         log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2750                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2751                 } else {
2752                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2753                         service_enter_dead(s, false, true);
2754                 }
2755
2756                 break;
2757
2758         case SERVICE_FINAL_SIGKILL:
2759                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2760                 service_enter_dead(s, false, true);
2761                 break;
2762
2763         case SERVICE_AUTO_RESTART:
2764                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2765                 service_enter_restart(s);
2766                 break;
2767
2768         default:
2769                 assert_not_reached("Timeout at wrong time.");
2770         }
2771 }
2772
2773 static void service_cgroup_notify_event(Unit *u) {
2774         Service *s = SERVICE(u);
2775
2776         assert(u);
2777
2778         log_debug("%s: cgroup is empty", u->meta.id);
2779
2780         switch (s->state) {
2781
2782                 /* Waiting for SIGCHLD is usually more interesting,
2783                  * because it includes return codes/signals. Which is
2784                  * why we ignore the cgroup events for most cases,
2785                  * except when we don't know pid which to expect the
2786                  * SIGCHLD for. */
2787
2788         case SERVICE_RUNNING:
2789                 service_enter_running(s, true);
2790                 break;
2791
2792         case SERVICE_STOP_SIGTERM:
2793         case SERVICE_STOP_SIGKILL:
2794                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2795                         service_enter_stop_post(s, true);
2796
2797                 break;
2798
2799         case SERVICE_FINAL_SIGTERM:
2800         case SERVICE_FINAL_SIGKILL:
2801                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2802                         service_enter_dead(s, true, true);
2803
2804                 break;
2805
2806         default:
2807                 ;
2808         }
2809 }
2810
2811 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2812         Service *s = SERVICE(u);
2813         const char *e;
2814
2815         assert(u);
2816
2817         if (s->notify_access == NOTIFY_NONE) {
2818                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2819                             u->meta.id, (unsigned long) pid);
2820                 return;
2821         }
2822
2823         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2824                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2825                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2826                 return;
2827         }
2828
2829         log_debug("%s: Got message", u->meta.id);
2830
2831         /* Interpret MAINPID= */
2832         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2833             (s->state == SERVICE_START ||
2834              s->state == SERVICE_START_POST ||
2835              s->state == SERVICE_RUNNING ||
2836              s->state == SERVICE_RELOAD)) {
2837
2838                 if (parse_pid(e + 8, &pid) < 0)
2839                         log_warning("Failed to parse notification message %s", e);
2840                 else {
2841                         log_debug("%s: got %s", u->meta.id, e);
2842                         service_set_main_pid(s, pid);
2843                 }
2844         }
2845
2846         /* Interpret READY= */
2847         if (s->type == SERVICE_NOTIFY &&
2848             s->state == SERVICE_START &&
2849             strv_find(tags, "READY=1")) {
2850                 log_debug("%s: got READY=1", u->meta.id);
2851
2852                 service_enter_start_post(s);
2853         }
2854
2855         /* Interpret STATUS= */
2856         if ((e = strv_find_prefix(tags, "STATUS="))) {
2857                 char *t;
2858
2859                 if (e[7]) {
2860                         if (!(t = strdup(e+7))) {
2861                                 log_error("Failed to allocate string.");
2862                                 return;
2863                         }
2864
2865                         log_debug("%s: got %s", u->meta.id, e);
2866
2867                         free(s->status_text);
2868                         s->status_text = t;
2869                 } else {
2870                         free(s->status_text);
2871                         s->status_text = NULL;
2872                 }
2873
2874         }
2875
2876         /* Notify clients about changed status or main pid */
2877         unit_add_to_dbus_queue(u);
2878 }
2879
2880 #ifdef HAVE_SYSV_COMPAT
2881 static int service_enumerate(Manager *m) {
2882         char **p;
2883         unsigned i;
2884         DIR *d = NULL;
2885         char *path = NULL, *fpath = NULL, *name = NULL;
2886         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2887         Unit *service;
2888         Iterator j;
2889         int r;
2890
2891         assert(m);
2892
2893         zero(runlevel_services);
2894
2895         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2896                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2897                         struct dirent *de;
2898
2899                         free(path);
2900                         path = NULL;
2901                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2902                                 r = -ENOMEM;
2903                                 goto finish;
2904                         }
2905
2906                         if (d)
2907                                 closedir(d);
2908
2909                         if (!(d = opendir(path))) {
2910                                 if (errno != ENOENT)
2911                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2912
2913                                 continue;
2914                         }
2915
2916                         while ((de = readdir(d))) {
2917                                 int a, b;
2918
2919                                 if (ignore_file(de->d_name))
2920                                         continue;
2921
2922                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2923                                         continue;
2924
2925                                 if (strlen(de->d_name) < 4)
2926                                         continue;
2927
2928                                 a = undecchar(de->d_name[1]);
2929                                 b = undecchar(de->d_name[2]);
2930
2931                                 if (a < 0 || b < 0)
2932                                         continue;
2933
2934                                 free(fpath);
2935                                 fpath = NULL;
2936                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2937                                         r = -ENOMEM;
2938                                         goto finish;
2939                                 }
2940
2941                                 if (access(fpath, X_OK) < 0) {
2942
2943                                         if (errno != ENOENT)
2944                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2945
2946                                         continue;
2947                                 }
2948
2949                                 free(name);
2950                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2951                                         r = -ENOMEM;
2952                                         goto finish;
2953                                 }
2954
2955                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2956                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2957                                         continue;
2958                                 }
2959
2960                                 if (de->d_name[0] == 'S')  {
2961
2962                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
2963                                                 SERVICE(service)->sysv_start_priority =
2964                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2965
2966                                                 SERVICE(service)->sysv_enabled = true;
2967                                         }
2968
2969                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
2970                                                 goto finish;
2971
2972                                         if ((r = set_put(runlevel_services[i], service)) < 0)
2973                                                 goto finish;
2974
2975                                 } else if (de->d_name[0] == 'K' &&
2976                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2977                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2978
2979                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
2980                                                 goto finish;
2981
2982                                         if ((r = set_put(shutdown_services, service)) < 0)
2983                                                 goto finish;
2984                                 }
2985                         }
2986                 }
2987
2988         /* Now we loaded all stubs and are aware of the lowest
2989         start-up priority for all services, not let's actually load
2990         the services, this will also tell us which services are
2991         actually native now */
2992         manager_dispatch_load_queue(m);
2993
2994         /* If this is a native service, rely on native ways to pull in
2995          * a service, don't pull it in via sysv rcN.d links. */
2996         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
2997                 SET_FOREACH(service, runlevel_services[i], j) {
2998                         service = unit_follow_merge(service);
2999
3000                         if (service->meta.fragment_path)
3001                                 continue;
3002
3003                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3004                                 goto finish;
3005                 }
3006
3007         /* We honour K links only for halt/reboot. For the normal
3008          * runlevels we assume the stop jobs will be implicitly added
3009          * by the core logic. Also, we don't really distuingish here
3010          * between the runlevels 0 and 6 and just add them to the
3011          * special shutdown target. On SUSE the boot.d/ runlevel is
3012          * also used for shutdown, so we add links for that too to the
3013          * shutdown target.*/
3014         SET_FOREACH(service, shutdown_services, j) {
3015                 service = unit_follow_merge(service);
3016
3017                 if (service->meta.fragment_path)
3018                         continue;
3019
3020                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3021                         goto finish;
3022         }
3023
3024         r = 0;
3025
3026 finish:
3027         free(path);
3028         free(fpath);
3029         free(name);
3030
3031         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3032                 set_free(runlevel_services[i]);
3033         set_free(shutdown_services);
3034
3035         if (d)
3036                 closedir(d);
3037
3038         return r;
3039 }
3040 #endif
3041
3042 static void service_bus_name_owner_change(
3043                 Unit *u,
3044                 const char *name,
3045                 const char *old_owner,
3046                 const char *new_owner) {
3047
3048         Service *s = SERVICE(u);
3049
3050         assert(s);
3051         assert(name);
3052
3053         assert(streq(s->bus_name, name));
3054         assert(old_owner || new_owner);
3055
3056         if (old_owner && new_owner)
3057                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3058         else if (old_owner)
3059                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3060         else
3061                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3062
3063         s->bus_name_good = !!new_owner;
3064
3065         if (s->type == SERVICE_DBUS) {
3066
3067                 /* service_enter_running() will figure out what to
3068                  * do */
3069                 if (s->state == SERVICE_RUNNING)
3070                         service_enter_running(s, true);
3071                 else if (s->state == SERVICE_START && new_owner)
3072                         service_enter_start_post(s);
3073
3074         } else if (new_owner &&
3075                    s->main_pid <= 0 &&
3076                    (s->state == SERVICE_START ||
3077                     s->state == SERVICE_START_POST ||
3078                     s->state == SERVICE_RUNNING ||
3079                     s->state == SERVICE_RELOAD)) {
3080
3081                 /* Try to acquire PID from bus service */
3082                 log_debug("Trying to acquire PID from D-Bus name...");
3083
3084                 bus_query_pid(u->meta.manager, name);
3085         }
3086 }
3087
3088 static void service_bus_query_pid_done(
3089                 Unit *u,
3090                 const char *name,
3091                 pid_t pid) {
3092
3093         Service *s = SERVICE(u);
3094
3095         assert(s);
3096         assert(name);
3097
3098         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3099
3100         if (s->main_pid <= 0 &&
3101             (s->state == SERVICE_START ||
3102              s->state == SERVICE_START_POST ||
3103              s->state == SERVICE_RUNNING ||
3104              s->state == SERVICE_RELOAD))
3105                 service_set_main_pid(s, pid);
3106 }
3107
3108 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3109         assert(s);
3110         assert(fd >= 0);
3111
3112         /* This is called by the socket code when instantiating a new
3113          * service for a stream socket and the socket needs to be
3114          * configured. */
3115
3116         if (s->meta.load_state != UNIT_LOADED)
3117                 return -EINVAL;
3118
3119         if (s->socket_fd >= 0)
3120                 return -EBUSY;
3121
3122         if (s->state != SERVICE_DEAD)
3123                 return -EAGAIN;
3124
3125         s->socket_fd = fd;
3126         s->got_socket_fd = true;
3127         s->accept_socket = sock;
3128
3129         return 0;
3130 }
3131
3132 static void service_reset_failed(Unit *u) {
3133         Service *s = SERVICE(u);
3134
3135         assert(s);
3136
3137         if (s->state == SERVICE_FAILED)
3138                 service_set_state(s, SERVICE_DEAD);
3139
3140         s->failure = false;
3141 }
3142
3143 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3144         Service *s = SERVICE(u);
3145         int r = 0;
3146         Set *pid_set = NULL;
3147
3148         assert(s);
3149
3150         if (s->main_pid <= 0 && who == KILL_MAIN) {
3151                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3152                 return -EINVAL;
3153         }
3154
3155         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3156                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3157                 return -ENOENT;
3158         }
3159
3160         if (s->control_pid > 0)
3161                 if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0)
3162                         r = -errno;
3163
3164         if (s->main_pid > 0)
3165                 if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0)
3166                         r = -errno;
3167
3168         if (mode == KILL_CONTROL_GROUP) {
3169                 int q;
3170
3171                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3172                         return -ENOMEM;
3173
3174                 /* Exclude the control/main pid from being killed via the cgroup */
3175                 if (s->control_pid > 0)
3176                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3177                                 r = q;
3178                                 goto finish;
3179                         }
3180
3181                 if (s->main_pid > 0)
3182                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3183                                 r = q;
3184                                 goto finish;
3185                         }
3186
3187                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, pid_set)) < 0)
3188                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3189                                 r = q;
3190         }
3191
3192 finish:
3193         if (pid_set)
3194                 set_free(pid_set);
3195
3196         return r;
3197 }
3198
3199 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3200         [SERVICE_DEAD] = "dead",
3201         [SERVICE_START_PRE] = "start-pre",
3202         [SERVICE_START] = "start",
3203         [SERVICE_START_POST] = "start-post",
3204         [SERVICE_RUNNING] = "running",
3205         [SERVICE_EXITED] = "exited",
3206         [SERVICE_RELOAD] = "reload",
3207         [SERVICE_STOP] = "stop",
3208         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3209         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3210         [SERVICE_STOP_POST] = "stop-post",
3211         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3212         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3213         [SERVICE_FAILED] = "failed",
3214         [SERVICE_AUTO_RESTART] = "auto-restart",
3215 };
3216
3217 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3218
3219 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3220         [SERVICE_RESTART_NO] = "no",
3221         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3222         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3223         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3224         [SERVICE_RESTART_ALWAYS] = "always"
3225 };
3226
3227 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3228
3229 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3230         [SERVICE_SIMPLE] = "simple",
3231         [SERVICE_FORKING] = "forking",
3232         [SERVICE_ONESHOT] = "oneshot",
3233         [SERVICE_DBUS] = "dbus",
3234         [SERVICE_NOTIFY] = "notify"
3235 };
3236
3237 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3238
3239 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3240         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3241         [SERVICE_EXEC_START] = "ExecStart",
3242         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3243         [SERVICE_EXEC_RELOAD] = "ExecReload",
3244         [SERVICE_EXEC_STOP] = "ExecStop",
3245         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3246 };
3247
3248 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3249
3250 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3251         [NOTIFY_NONE] = "none",
3252         [NOTIFY_MAIN] = "main",
3253         [NOTIFY_ALL] = "all"
3254 };
3255
3256 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3257
3258 const UnitVTable service_vtable = {
3259         .suffix = ".service",
3260         .show_status = true,
3261
3262         .init = service_init,
3263         .done = service_done,
3264         .load = service_load,
3265
3266         .coldplug = service_coldplug,
3267
3268         .dump = service_dump,
3269
3270         .start = service_start,
3271         .stop = service_stop,
3272         .reload = service_reload,
3273
3274         .can_reload = service_can_reload,
3275
3276         .kill = service_kill,
3277
3278         .serialize = service_serialize,
3279         .deserialize_item = service_deserialize_item,
3280
3281         .active_state = service_active_state,
3282         .sub_state_to_string = service_sub_state_to_string,
3283
3284 #ifdef HAVE_SYSV_COMPAT
3285         .check_gc = service_check_gc,
3286 #endif
3287         .check_snapshot = service_check_snapshot,
3288
3289         .sigchld_event = service_sigchld_event,
3290         .timer_event = service_timer_event,
3291
3292         .reset_failed = service_reset_failed,
3293
3294         .cgroup_notify_empty = service_cgroup_notify_event,
3295         .notify_message = service_notify_message,
3296
3297         .bus_name_owner_change = service_bus_name_owner_change,
3298         .bus_query_pid_done = service_bus_query_pid_done,
3299
3300         .bus_interface = "org.freedesktop.systemd1.Service",
3301         .bus_message_handler = bus_service_message_handler,
3302         .bus_invalidating_properties =  bus_service_invalidating_properties,
3303
3304 #ifdef HAVE_SYSV_COMPAT
3305         .enumerate = service_enumerate
3306 #endif
3307 };