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 #include "def.h"
  39 #include "util.h"
  40
  41 #ifdef HAVE_SYSV_COMPAT
  42
  43 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
  44
  45 typedef enum RunlevelType {
  46         RUNLEVEL_UP,
  47         RUNLEVEL_DOWN,
  48         RUNLEVEL_SYSINIT
  49 } RunlevelType;
  50
  51 static const struct {
  52         const char *path;
  53         const char *target;
  54         const RunlevelType type;
  55 } rcnd_table[] = {
  56         /* Standard SysV runlevels for start-up */
  57         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  58         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  59         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  60         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  61         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  62
  63 #ifdef TARGET_SUSE
  64         /* SUSE style boot.d */
  65         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  66 #endif
  67
  68 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_FRUGALWARE)
  69         /* Debian style rcS.d */
  70         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  71 #endif
  72
  73         /* Standard SysV runlevels for shutdown */
  74         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  75         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  76
  77         /* Note that the order here matters, as we read the
  78            directories in this order, and we want to make sure that
  79            sysv_start_priority is known when we first load the
  80            unit. And that value we only know from S links. Hence
  81            UP/SYSINIT must be read before DOWN */
  82 };
  83
  84 #define RUNLEVELS_UP "12345"
  85 /* #define RUNLEVELS_DOWN "06" */
  86 /* #define RUNLEVELS_BOOT "bBsS" */
  87 #endif
  88
  89 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  90         [SERVICE_DEAD] = UNIT_INACTIVE,
  91         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  92         [SERVICE_START] = UNIT_ACTIVATING,
  93         [SERVICE_START_POST] = UNIT_ACTIVATING,
  94         [SERVICE_RUNNING] = UNIT_ACTIVE,
  95         [SERVICE_EXITED] = UNIT_ACTIVE,
  96         [SERVICE_RELOAD] = UNIT_RELOADING,
  97         [SERVICE_STOP] = UNIT_DEACTIVATING,
  98         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 101         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 103         [SERVICE_FAILED] = UNIT_FAILED,
 104         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 105 };
 106
 107 static void service_init(Unit *u) {
 108         Service *s = SERVICE(u);
 109
 110         assert(u);
 111         assert(u->meta.load_state == UNIT_STUB);
 112
 113         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 114         s->restart_usec = DEFAULT_RESTART_USEC;
 115         s->timer_watch.type = WATCH_INVALID;
 116 #ifdef HAVE_SYSV_COMPAT
 117         s->sysv_start_priority = -1;
 118         s->sysv_start_priority_from_rcnd = -1;
 119 #endif
 120         s->socket_fd = -1;
 121         s->guess_main_pid = true;
 122
 123         exec_context_init(&s->exec_context);
 124         s->exec_context.std_output = u->meta.manager->default_std_output;
 125         s->exec_context.std_error = u->meta.manager->default_std_error;
 126
 127         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 128
 129         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 130 }
 131
 132 static void service_unwatch_control_pid(Service *s) {
 133         assert(s);
 134
 135         if (s->control_pid <= 0)
 136                 return;
 137
 138         unit_unwatch_pid(UNIT(s), s->control_pid);
 139         s->control_pid = 0;
 140 }
 141
 142 static void service_unwatch_main_pid(Service *s) {
 143         assert(s);
 144
 145         if (s->main_pid <= 0)
 146                 return;
 147
 148         unit_unwatch_pid(UNIT(s), s->main_pid);
 149         s->main_pid = 0;
 150 }
 151
 152 static int service_set_main_pid(Service *s, pid_t pid) {
 153         pid_t ppid;
 154
 155         assert(s);
 156
 157         if (pid <= 1)
 158                 return -EINVAL;
 159
 160         if (pid == getpid())
 161                 return -EINVAL;
 162
 163         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 164                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 165                             s->meta.id, (unsigned long) pid);
 166
 167         s->main_pid = pid;
 168         s->main_pid_known = true;
 169
 170         exec_status_start(&s->main_exec_status, pid);
 171
 172         return 0;
 173 }
 174
 175 static void service_close_socket_fd(Service *s) {
 176         assert(s);
 177
 178         if (s->socket_fd < 0)
 179                 return;
 180
 181         close_nointr_nofail(s->socket_fd);
 182         s->socket_fd = -1;
 183 }
 184
 185 static void service_connection_unref(Service *s) {
 186         assert(s);
 187
 188         if (!s->accept_socket)
 189                 return;
 190
 191         socket_connection_unref(s->accept_socket);
 192         s->accept_socket = NULL;
 193 }
 194
 195 static void service_done(Unit *u) {
 196         Service *s = SERVICE(u);
 197
 198         assert(s);
 199
 200         free(s->pid_file);
 201         s->pid_file = NULL;
 202
 203 #ifdef HAVE_SYSV_COMPAT
 204         free(s->sysv_path);
 205         s->sysv_path = NULL;
 206
 207         free(s->sysv_runlevels);
 208         s->sysv_runlevels = NULL;
 209 #endif
 210
 211         free(s->status_text);
 212         s->status_text = NULL;
 213
 214         exec_context_done(&s->exec_context);
 215         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 216         s->control_command = NULL;
 217         s->main_command = NULL;
 218
 219         /* This will leak a process, but at least no memory or any of
 220          * our resources */
 221         service_unwatch_main_pid(s);
 222         service_unwatch_control_pid(s);
 223
 224         if (s->bus_name)  {
 225                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 226                 free(s->bus_name);
 227                 s->bus_name = NULL;
 228         }
 229
 230         service_close_socket_fd(s);
 231         service_connection_unref(s);
 232
 233         set_free(s->configured_sockets);
 234
 235         unit_unwatch_timer(u, &s->timer_watch);
 236 }
 237
 238 #ifdef HAVE_SYSV_COMPAT
 239 static char *sysv_translate_name(const char *name) {
 240         char *r;
 241
 242         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 243                 return NULL;
 244
 245 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 246         if (endswith(name, ".sh"))
 247                 /* Drop Debian-style .sh suffix */
 248                 strcpy(stpcpy(r, name) - 3, ".service");
 249 #endif
 250 #ifdef TARGET_SUSE
 251         if (startswith(name, "boot."))
 252                 /* Drop SuSE-style boot. prefix */
 253                 strcpy(stpcpy(r, name + 5), ".service");
 254 #endif
 255 #ifdef TARGET_FRUGALWARE
 256         if (startswith(name, "rc."))
 257                 /* Drop Frugalware-style rc. prefix */
 258                 strcpy(stpcpy(r, name + 3), ".service");
 259 #endif
 260         else
 261                 /* Normal init scripts */
 262                 strcpy(stpcpy(r, name), ".service");
 263
 264         return r;
 265 }
 266
 267 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 268
 269         /* We silently ignore the $ prefix here. According to the LSB
 270          * spec it simply indicates whether something is a
 271          * standardized name or a distribution-specific one. Since we
 272          * just follow what already exists and do not introduce new
 273          * uses or names we don't care who introduced a new name. */
 274
 275         static const char * const table[] = {
 276                 /* LSB defined facilities */
 277                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 278 #ifndef TARGET_MANDRIVA
 279                 /* Due to unfortunate name selection in Mandriva,
 280                  * $network is provided by network-up which is ordered
 281                  * after network which actually starts interfaces.
 282                  * To break the loop, just ignore it */
 283                 "network",              SPECIAL_NETWORK_TARGET,
 284 #endif
 285                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 286                 "portmap",              SPECIAL_RPCBIND_TARGET,
 287                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 288                 "syslog",               SPECIAL_SYSLOG_TARGET,
 289                 "time",                 SPECIAL_RTC_SET_TARGET,
 290
 291                 /* common extensions */
 292                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 293                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 294                 "null",                 NULL,
 295
 296 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 297                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 298 #endif
 299
 300 #ifdef TARGET_FEDORA
 301                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 302                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 303                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 304 #endif
 305
 306 #ifdef TARGET_SUSE
 307                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 308 #endif
 309         };
 310
 311         unsigned i;
 312         char *r;
 313         const char *n;
 314
 315         assert(name);
 316         assert(_r);
 317
 318         n = *name == '$' ? name + 1 : name;
 319
 320         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 321
 322                 if (!streq(table[i], n))
 323                         continue;
 324
 325                 if (!table[i+1])
 326                         return 0;
 327
 328                 if (!(r = strdup(table[i+1])))
 329                         return -ENOMEM;
 330
 331                 goto finish;
 332         }
 333
 334         /* If we don't know this name, fallback heuristics to figure
 335          * out whether something is a target or a service alias. */
 336
 337         if (*name == '$') {
 338                 if (!unit_prefix_is_valid(n))
 339                         return -EINVAL;
 340
 341                 /* Facilities starting with $ are most likely targets */
 342                 r = unit_name_build(n, NULL, ".target");
 343         } else if (filename && streq(name, filename))
 344                 /* Names equaling the file name of the services are redundant */
 345                 return 0;
 346         else
 347                 /* Everything else we assume to be normal service names */
 348                 r = sysv_translate_name(n);
 349
 350         if (!r)
 351                 return -ENOMEM;
 352
 353 finish:
 354         *_r = r;
 355
 356         return 1;
 357 }
 358
 359 static int sysv_fix_order(Service *s) {
 360         Meta *other;
 361         int r;
 362
 363         assert(s);
 364
 365         if (s->sysv_start_priority < 0)
 366                 return 0;
 367
 368         /* For each pair of services where at least one lacks a LSB
 369          * header, we use the start priority value to order things. */
 370
 371         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 372                 Service *t;
 373                 UnitDependency d;
 374                 bool special_s, special_t;
 375
 376                 t = (Service*) other;
 377
 378                 if (s == t)
 379                         continue;
 380
 381                 if (t->meta.load_state != UNIT_LOADED)
 382                         continue;
 383
 384                 if (t->sysv_start_priority < 0)
 385                         continue;
 386
 387                 /* If both units have modern headers we don't care
 388                  * about the priorities */
 389                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 390                     (t->meta.fragment_path || t->sysv_has_lsb))
 391                         continue;
 392
 393                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 394                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 395
 396                 if (special_t && !special_s)
 397                         d = UNIT_AFTER;
 398                 else if (special_s && !special_t)
 399                         d = UNIT_BEFORE;
 400                 else if (t->sysv_start_priority < s->sysv_start_priority)
 401                         d = UNIT_AFTER;
 402                 else if (t->sysv_start_priority > s->sysv_start_priority)
 403                         d = UNIT_BEFORE;
 404                 else
 405                         continue;
 406
 407                 /* FIXME: Maybe we should compare the name here lexicographically? */
 408
 409                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 410                         return r;
 411         }
 412
 413         return 0;
 414 }
 415
 416 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 417         ExecCommand *c;
 418
 419         if (!(c = new0(ExecCommand, 1)))
 420                 return NULL;
 421
 422         if (!(c->path = strdup(path))) {
 423                 free(c);
 424                 return NULL;
 425         }
 426
 427         if (!(c->argv = strv_new(path, arg1, NULL))) {
 428                 free(c->path);
 429                 free(c);
 430                 return NULL;
 431         }
 432
 433         return c;
 434 }
 435
 436 static int sysv_exec_commands(Service *s) {
 437         ExecCommand *c;
 438
 439         assert(s);
 440         assert(s->sysv_path);
 441
 442         if (!(c = exec_command_new(s->sysv_path, "start")))
 443                 return -ENOMEM;
 444         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 445
 446         if (!(c = exec_command_new(s->sysv_path, "stop")))
 447                 return -ENOMEM;
 448         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 449
 450         if (!(c = exec_command_new(s->sysv_path, "reload")))
 451                 return -ENOMEM;
 452         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 453
 454         return 0;
 455 }
 456
 457 static int service_load_sysv_path(Service *s, const char *path) {
 458         FILE *f;
 459         Unit *u;
 460         unsigned line = 0;
 461         int r;
 462         enum {
 463                 NORMAL,
 464                 DESCRIPTION,
 465                 LSB,
 466                 LSB_DESCRIPTION
 467         } state = NORMAL;
 468         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 469
 470         assert(s);
 471         assert(path);
 472
 473         u = UNIT(s);
 474
 475         if (!(f = fopen(path, "re"))) {
 476                 r = errno == ENOENT ? 0 : -errno;
 477                 goto finish;
 478         }
 479
 480         free(s->sysv_path);
 481         if (!(s->sysv_path = strdup(path))) {
 482                 r = -ENOMEM;
 483                 goto finish;
 484         }
 485
 486         while (!feof(f)) {
 487                 char l[LINE_MAX], *t;
 488
 489                 if (!fgets(l, sizeof(l), f)) {
 490                         if (feof(f))
 491                                 break;
 492
 493                         r = -errno;
 494                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 495                         goto finish;
 496                 }
 497
 498                 line++;
 499
 500                 t = strstrip(l);
 501                 if (*t != '#')
 502                         continue;
 503
 504                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 505                         state = LSB;
 506                         s->sysv_has_lsb = true;
 507                         continue;
 508                 }
 509
 510                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 511                         state = NORMAL;
 512                         continue;
 513                 }
 514
 515                 t++;
 516                 t += strspn(t, WHITESPACE);
 517
 518                 if (state == NORMAL) {
 519
 520                         /* Try to parse Red Hat style chkconfig headers */
 521
 522                         if (startswith_no_case(t, "chkconfig:")) {
 523                                 int start_priority;
 524                                 char runlevels[16], *k;
 525
 526                                 state = NORMAL;
 527
 528                                 if (sscanf(t+10, "%15s %i %*i",
 529                                            runlevels,
 530                                            &start_priority) != 2) {
 531
 532                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 533                                         continue;
 534                                 }
 535
 536                                 /* A start priority gathered from the
 537                                  * symlink farms is preferred over the
 538                                  * data from the LSB header. */
 539                                 if (start_priority < 0 || start_priority > 99)
 540                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 541                                 else
 542                                         s->sysv_start_priority = start_priority;
 543
 544                                 char_array_0(runlevels);
 545                                 k = delete_chars(runlevels, WHITESPACE "-");
 546
 547                                 if (k[0]) {
 548                                         char *d;
 549
 550                                         if (!(d = strdup(k))) {
 551                                                 r = -ENOMEM;
 552                                                 goto finish;
 553                                         }
 554
 555                                         free(s->sysv_runlevels);
 556                                         s->sysv_runlevels = d;
 557                                 }
 558
 559                         } else if (startswith_no_case(t, "description:")) {
 560
 561                                 size_t k = strlen(t);
 562                                 char *d;
 563                                 const char *j;
 564
 565                                 if (t[k-1] == '\\') {
 566                                         state = DESCRIPTION;
 567                                         t[k-1] = 0;
 568                                 }
 569
 570                                 if ((j = strstrip(t+12)) && *j) {
 571                                         if (!(d = strdup(j))) {
 572                                                 r = -ENOMEM;
 573                                                 goto finish;
 574                                         }
 575                                 } else
 576                                         d = NULL;
 577
 578                                 free(chkconfig_description);
 579                                 chkconfig_description = d;
 580
 581                         } else if (startswith_no_case(t, "pidfile:")) {
 582
 583                                 char *fn;
 584
 585                                 state = NORMAL;
 586
 587                                 fn = strstrip(t+8);
 588                                 if (!path_is_absolute(fn)) {
 589                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 590                                         continue;
 591                                 }
 592
 593                                 if (!(fn = strdup(fn))) {
 594                                         r = -ENOMEM;
 595                                         goto finish;
 596                                 }
 597
 598                                 free(s->pid_file);
 599                                 s->pid_file = fn;
 600                         }
 601
 602                 } else if (state == DESCRIPTION) {
 603
 604                         /* Try to parse Red Hat style description
 605                          * continuation */
 606
 607                         size_t k = strlen(t);
 608                         char *j;
 609
 610                         if (t[k-1] == '\\')
 611                                 t[k-1] = 0;
 612                         else
 613                                 state = NORMAL;
 614
 615                         if ((j = strstrip(t)) && *j) {
 616                                 char *d = NULL;
 617
 618                                 if (chkconfig_description)
 619                                         asprintf(&d, "%s %s", chkconfig_description, j);
 620                                 else
 621                                         d = strdup(j);
 622
 623                                 if (!d) {
 624                                         r = -ENOMEM;
 625                                         goto finish;
 626                                 }
 627
 628                                 free(chkconfig_description);
 629                                 chkconfig_description = d;
 630                         }
 631
 632                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 633
 634                         if (startswith_no_case(t, "Provides:")) {
 635                                 char *i, *w;
 636                                 size_t z;
 637
 638                                 state = LSB;
 639
 640                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 641                                         char *n, *m;
 642
 643                                         if (!(n = strndup(w, z))) {
 644                                                 r = -ENOMEM;
 645                                                 goto finish;
 646                                         }
 647
 648                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 649                                         free(n);
 650
 651                                         if (r < 0)
 652                                                 goto finish;
 653
 654                                         if (r == 0)
 655                                                 continue;
 656
 657                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 658                                                 r = unit_add_name(u, m);
 659                                         else
 660                                                 /* NB: SysV targets
 661                                                  * which are provided
 662                                                  * by a service are
 663                                                  * pulled in by the
 664                                                  * services, as an
 665                                                  * indication that the
 666                                                  * generic service is
 667                                                  * now available. This
 668                                                  * is strictly
 669                                                  * one-way. The
 670                                                  * targets do NOT pull
 671                                                  * in the SysV
 672                                                  * services! */
 673                                                 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
 674
 675                                         if (r < 0)
 676                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 677
 678                                         free(m);
 679                                 }
 680
 681                         } else if (startswith_no_case(t, "Required-Start:") ||
 682                                    startswith_no_case(t, "Should-Start:") ||
 683                                    startswith_no_case(t, "X-Start-Before:") ||
 684                                    startswith_no_case(t, "X-Start-After:")) {
 685                                 char *i, *w;
 686                                 size_t z;
 687
 688                                 state = LSB;
 689
 690                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 691                                         char *n, *m;
 692
 693                                         if (!(n = strndup(w, z))) {
 694                                                 r = -ENOMEM;
 695                                                 goto finish;
 696                                         }
 697
 698                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 699
 700                                         if (r < 0) {
 701                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
 702                                                 free(n);
 703                                                 continue;
 704                                         }
 705
 706                                         free(n);
 707
 708                                         if (r == 0)
 709                                                 continue;
 710
 711                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 712
 713                                         if (r < 0)
 714                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 715
 716                                         free(m);
 717                                 }
 718                         } else if (startswith_no_case(t, "Default-Start:")) {
 719                                 char *k, *d;
 720
 721                                 state = LSB;
 722
 723                                 k = delete_chars(t+14, WHITESPACE "-");
 724
 725                                 if (k[0] != 0) {
 726                                         if (!(d = strdup(k))) {
 727                                                 r = -ENOMEM;
 728                                                 goto finish;
 729                                         }
 730
 731                                         free(s->sysv_runlevels);
 732                                         s->sysv_runlevels = d;
 733                                 }
 734
 735                         } else if (startswith_no_case(t, "Description:")) {
 736                                 char *d, *j;
 737
 738                                 state = LSB_DESCRIPTION;
 739
 740                                 if ((j = strstrip(t+12)) && *j) {
 741                                         if (!(d = strdup(j))) {
 742                                                 r = -ENOMEM;
 743                                                 goto finish;
 744                                         }
 745                                 } else
 746                                         d = NULL;
 747
 748                                 free(long_description);
 749                                 long_description = d;
 750
 751                         } else if (startswith_no_case(t, "Short-Description:")) {
 752                                 char *d, *j;
 753
 754                                 state = LSB;
 755
 756                                 if ((j = strstrip(t+18)) && *j) {
 757                                         if (!(d = strdup(j))) {
 758                                                 r = -ENOMEM;
 759                                                 goto finish;
 760                                         }
 761                                 } else
 762                                         d = NULL;
 763
 764                                 free(short_description);
 765                                 short_description = d;
 766
 767                         } else if (startswith_no_case(t, "X-Interactive:")) {
 768                                 int b;
 769
 770                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 771                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 772                                         continue;
 773                                 }
 774
 775                                 if (b)
 776                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 777                                 else
 778                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 779
 780                         } else if (state == LSB_DESCRIPTION) {
 781
 782                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 783                                         char *j;
 784
 785                                         if ((j = strstrip(t)) && *j) {
 786                                                 char *d = NULL;
 787
 788                                                 if (long_description)
 789                                                         asprintf(&d, "%s %s", long_description, t);
 790                                                 else
 791                                                         d = strdup(j);
 792
 793                                                 if (!d) {
 794                                                         r = -ENOMEM;
 795                                                         goto finish;
 796                                                 }
 797
 798                                                 free(long_description);
 799                                                 long_description = d;
 800                                         }
 801
 802                                 } else
 803                                         state = LSB;
 804                         }
 805                 }
 806         }
 807
 808         if ((r = sysv_exec_commands(s)) < 0)
 809                 goto finish;
 810
 811         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 812                 /* If there a runlevels configured for this service
 813                  * but none of the standard ones, then we assume this
 814                  * is some special kind of service (which might be
 815                  * needed for early boot) and don't create any links
 816                  * to it. */
 817
 818                 s->meta.default_dependencies = false;
 819
 820                 /* Don't timeout special services during boot (like fsck) */
 821                 s->timeout_usec = 0;
 822         } else
 823                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 824
 825         /* Special setting for all SysV services */
 826         s->type = SERVICE_FORKING;
 827         s->remain_after_exit = true;
 828         s->restart = SERVICE_RESTART_NO;
 829         s->exec_context.std_output =
 830                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 831                 ? EXEC_OUTPUT_TTY : s->meta.manager->default_std_output;
 832         s->exec_context.kill_mode = KILL_PROCESS;
 833
 834         /* We use the long description only if
 835          * no short description is set. */
 836
 837         if (short_description)
 838                 description = short_description;
 839         else if (chkconfig_description)
 840                 description = chkconfig_description;
 841         else if (long_description)
 842                 description = long_description;
 843         else
 844                 description = NULL;
 845
 846         if (description) {
 847                 char *d;
 848
 849                 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
 850                         r = -ENOMEM;
 851                         goto finish;
 852                 }
 853
 854                 u->meta.description = d;
 855         }
 856
 857         /* The priority that has been set in /etc/rcN.d/ hierarchies
 858          * takes precedence over what is stored as default in the LSB
 859          * header */
 860         if (s->sysv_start_priority_from_rcnd >= 0)
 861                 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
 862
 863         u->meta.load_state = UNIT_LOADED;
 864         r = 0;
 865
 866 finish:
 867
 868         if (f)
 869                 fclose(f);
 870
 871         free(short_description);
 872         free(long_description);
 873         free(chkconfig_description);
 874
 875         return r;
 876 }
 877
 878 static int service_load_sysv_name(Service *s, const char *name) {
 879         char **p;
 880
 881         assert(s);
 882         assert(name);
 883
 884         /* For SysV services we strip the boot.*, rc.* and *.sh
 885          * prefixes/suffixes. */
 886 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 887         if (endswith(name, ".sh.service"))
 888                 return -ENOENT;
 889 #endif
 890
 891 #ifdef TARGET_SUSE
 892         if (startswith(name, "boot."))
 893                 return -ENOENT;
 894 #endif
 895
 896 #ifdef TARGET_FRUGALWARE
 897         if (startswith(name, "rc."))
 898                 return -ENOENT;
 899 #endif
 900
 901         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 902                 char *path;
 903                 int r;
 904
 905                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 906                         return -ENOMEM;
 907
 908                 assert(endswith(path, ".service"));
 909                 path[strlen(path)-8] = 0;
 910
 911                 r = service_load_sysv_path(s, path);
 912
 913 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 914                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 915                         /* Try Debian style *.sh source'able init scripts */
 916                         strcat(path, ".sh");
 917                         r = service_load_sysv_path(s, path);
 918                 }
 919 #endif
 920                 free(path);
 921
 922 #ifdef TARGET_SUSE
 923                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 924                         /* Try SUSE style boot.* init scripts */
 925
 926                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 927                                 return -ENOMEM;
 928
 929                         /* Drop .service suffix */
 930                         path[strlen(path)-8] = 0;
 931                         r = service_load_sysv_path(s, path);
 932                         free(path);
 933                 }
 934 #endif
 935
 936 #ifdef TARGET_FRUGALWARE
 937                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 938                         /* Try Frugalware style rc.* init scripts */
 939
 940                         if (asprintf(&path, "%s/rc.%s", *p, name) < 0)
 941                                 return -ENOMEM;
 942
 943                         /* Drop .service suffix */
 944                         path[strlen(path)-8] = 0;
 945                         r = service_load_sysv_path(s, path);
 946                         free(path);
 947                 }
 948 #endif
 949
 950                 if (r < 0)
 951                         return r;
 952
 953                 if ((s->meta.load_state != UNIT_STUB))
 954                         break;
 955         }
 956
 957         return 0;
 958 }
 959
 960 static int service_load_sysv(Service *s) {
 961         const char *t;
 962         Iterator i;
 963         int r;
 964
 965         assert(s);
 966
 967         /* Load service data from SysV init scripts, preferably with
 968          * LSB headers ... */
 969
 970         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 971                 return 0;
 972
 973         if ((t = s->meta.id))
 974                 if ((r = service_load_sysv_name(s, t)) < 0)
 975                         return r;
 976
 977         if (s->meta.load_state == UNIT_STUB)
 978                 SET_FOREACH(t, s->meta.names, i) {
 979                         if (t == s->meta.id)
 980                                 continue;
 981
 982                         if ((r = service_load_sysv_name(s, t)) < 0)
 983                                 return r;
 984
 985                         if (s->meta.load_state != UNIT_STUB)
 986                                 break;
 987                 }
 988
 989         return 0;
 990 }
 991 #endif
 992
 993 static int fsck_fix_order(Service *s) {
 994         Meta *other;
 995         int r;
 996
 997         assert(s);
 998
 999         if (s->fsck_passno <= 0)
1000                 return 0;
1001
1002         /* For each pair of services where both have an fsck priority
1003          * we order things based on it. */
1004
1005         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
1006                 Service *t;
1007                 UnitDependency d;
1008
1009                 t = (Service*) other;
1010
1011                 if (s == t)
1012                         continue;
1013
1014                 if (t->meta.load_state != UNIT_LOADED)
1015                         continue;
1016
1017                 if (t->fsck_passno <= 0)
1018                         continue;
1019
1020                 if (t->fsck_passno < s->fsck_passno)
1021                         d = UNIT_AFTER;
1022                 else if (t->fsck_passno > s->fsck_passno)
1023                         d = UNIT_BEFORE;
1024                 else
1025                         continue;
1026
1027                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1028                         return r;
1029         }
1030
1031         return 0;
1032 }
1033
1034 static int service_verify(Service *s) {
1035         assert(s);
1036
1037         if (s->meta.load_state != UNIT_LOADED)
1038                 return 0;
1039
1040         if (!s->exec_command[SERVICE_EXEC_START]) {
1041                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1042                 return -EINVAL;
1043         }
1044
1045         if (s->type != SERVICE_ONESHOT &&
1046             s->exec_command[SERVICE_EXEC_START]->command_next) {
1047                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1048                 return -EINVAL;
1049         }
1050
1051         if (s->type == SERVICE_ONESHOT &&
1052             s->exec_command[SERVICE_EXEC_RELOAD]) {
1053                 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", s->meta.id);
1054                 return -EINVAL;
1055         }
1056
1057         if (s->type == SERVICE_DBUS && !s->bus_name) {
1058                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1059                 return -EINVAL;
1060         }
1061
1062         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1063                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1064                 return -EINVAL;
1065         }
1066
1067         return 0;
1068 }
1069
1070 static int service_add_default_dependencies(Service *s) {
1071         int r;
1072
1073         assert(s);
1074
1075         /* Add a number of automatic dependencies useful for the
1076          * majority of services. */
1077
1078         /* First, pull in base system */
1079         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1080
1081                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1082                         return r;
1083
1084         } else if (s->meta.manager->running_as == MANAGER_USER) {
1085
1086                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1087                         return r;
1088         }
1089
1090         /* Second, activate normal shutdown */
1091         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1092 }
1093
1094 static int service_load(Unit *u) {
1095         int r;
1096         Service *s = SERVICE(u);
1097
1098         assert(s);
1099
1100         /* Load a .service file */
1101         if ((r = unit_load_fragment(u)) < 0)
1102                 return r;
1103
1104 #ifdef HAVE_SYSV_COMPAT
1105         /* Load a classic init script as a fallback, if we couldn't find anything */
1106         if (u->meta.load_state == UNIT_STUB)
1107                 if ((r = service_load_sysv(s)) < 0)
1108                         return r;
1109 #endif
1110
1111         /* Still nothing found? Then let's give up */
1112         if (u->meta.load_state == UNIT_STUB)
1113                 return -ENOENT;
1114
1115         /* We were able to load something, then let's add in the
1116          * dropin directories. */
1117         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1118                 return r;
1119
1120         /* This is a new unit? Then let's add in some extras */
1121         if (u->meta.load_state == UNIT_LOADED) {
1122                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1123                         return r;
1124
1125                 if ((r = unit_add_default_cgroups(u)) < 0)
1126                         return r;
1127
1128 #ifdef HAVE_SYSV_COMPAT
1129                 if ((r = sysv_fix_order(s)) < 0)
1130                         return r;
1131 #endif
1132
1133                 if ((r = fsck_fix_order(s)) < 0)
1134                         return r;
1135
1136                 if (s->bus_name)
1137                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1138                                 return r;
1139
1140                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1141                         s->notify_access = NOTIFY_MAIN;
1142
1143                 if (s->type == SERVICE_DBUS || s->bus_name)
1144                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true)) < 0)
1145                                 return r;
1146
1147                 if (s->meta.default_dependencies)
1148                         if ((r = service_add_default_dependencies(s)) < 0)
1149                                 return r;
1150         }
1151
1152         return service_verify(s);
1153 }
1154
1155 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1156
1157         ServiceExecCommand c;
1158         Service *s = SERVICE(u);
1159         const char *prefix2;
1160         char *p2;
1161
1162         assert(s);
1163
1164         p2 = strappend(prefix, "\t");
1165         prefix2 = p2 ? p2 : prefix;
1166
1167         fprintf(f,
1168                 "%sService State: %s\n"
1169                 "%sPermissionsStartOnly: %s\n"
1170                 "%sRootDirectoryStartOnly: %s\n"
1171                 "%sRemainAfterExit: %s\n"
1172                 "%sGuessMainPID: %s\n"
1173                 "%sType: %s\n"
1174                 "%sRestart: %s\n"
1175                 "%sNotifyAccess: %s\n",
1176                 prefix, service_state_to_string(s->state),
1177                 prefix, yes_no(s->permissions_start_only),
1178                 prefix, yes_no(s->root_directory_start_only),
1179                 prefix, yes_no(s->remain_after_exit),
1180                 prefix, yes_no(s->guess_main_pid),
1181                 prefix, service_type_to_string(s->type),
1182                 prefix, service_restart_to_string(s->restart),
1183                 prefix, notify_access_to_string(s->notify_access));
1184
1185         if (s->control_pid > 0)
1186                 fprintf(f,
1187                         "%sControl PID: %lu\n",
1188                         prefix, (unsigned long) s->control_pid);
1189
1190         if (s->main_pid > 0)
1191                 fprintf(f,
1192                         "%sMain PID: %lu\n",
1193                         prefix, (unsigned long) s->main_pid);
1194
1195         if (s->pid_file)
1196                 fprintf(f,
1197                         "%sPIDFile: %s\n",
1198                         prefix, s->pid_file);
1199
1200         if (s->bus_name)
1201                 fprintf(f,
1202                         "%sBusName: %s\n"
1203                         "%sBus Name Good: %s\n",
1204                         prefix, s->bus_name,
1205                         prefix, yes_no(s->bus_name_good));
1206
1207         exec_context_dump(&s->exec_context, f, prefix);
1208
1209         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1210
1211                 if (!s->exec_command[c])
1212                         continue;
1213
1214                 fprintf(f, "%s-> %s:\n",
1215                         prefix, service_exec_command_to_string(c));
1216
1217                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1218         }
1219
1220 #ifdef HAVE_SYSV_COMPAT
1221         if (s->sysv_path)
1222                 fprintf(f,
1223                         "%sSysV Init Script Path: %s\n"
1224                         "%sSysV Init Script has LSB Header: %s\n"
1225                         "%sSysVEnabled: %s\n",
1226                         prefix, s->sysv_path,
1227                         prefix, yes_no(s->sysv_has_lsb),
1228                         prefix, yes_no(s->sysv_enabled));
1229
1230         if (s->sysv_start_priority >= 0)
1231                 fprintf(f,
1232                         "%sSysVStartPriority: %i\n",
1233                         prefix, s->sysv_start_priority);
1234
1235         if (s->sysv_runlevels)
1236                 fprintf(f, "%sSysVRunLevels: %s\n",
1237                         prefix, s->sysv_runlevels);
1238 #endif
1239
1240         if (s->fsck_passno > 0)
1241                 fprintf(f,
1242                         "%sFsckPassNo: %i\n",
1243                         prefix, s->fsck_passno);
1244
1245         if (s->status_text)
1246                 fprintf(f, "%sStatus Text: %s\n",
1247                         prefix, s->status_text);
1248
1249         free(p2);
1250 }
1251
1252 static int service_load_pid_file(Service *s) {
1253         char *k;
1254         int r;
1255         pid_t pid;
1256
1257         assert(s);
1258
1259         if (!s->pid_file)
1260                 return -ENOENT;
1261
1262         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1263                 return r;
1264
1265         r = parse_pid(k, &pid);
1266         free(k);
1267
1268         if (r < 0)
1269                 return r;
1270
1271         if (kill(pid, 0) < 0 && errno != EPERM) {
1272                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1273                             (unsigned long) pid, s->pid_file);
1274                 return -ESRCH;
1275         }
1276
1277         if ((r = service_set_main_pid(s, pid)) < 0)
1278                 return r;
1279
1280         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1281                 /* FIXME: we need to do something here */
1282                 return r;
1283
1284         return 0;
1285 }
1286
1287 static int service_search_main_pid(Service *s) {
1288         pid_t pid;
1289         int r;
1290
1291         assert(s);
1292
1293         /* If we know it anyway, don't ever fallback to unreliable
1294          * heuristics */
1295         if (s->main_pid_known)
1296                 return 0;
1297
1298         if (!s->guess_main_pid)
1299                 return 0;
1300
1301         assert(s->main_pid <= 0);
1302
1303         if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1304                 return -ENOENT;
1305
1306         if ((r = service_set_main_pid(s, pid)) < 0)
1307                 return r;
1308
1309         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1310                 /* FIXME: we need to do something here */
1311                 return r;
1312
1313         return 0;
1314 }
1315
1316 static int service_get_sockets(Service *s, Set **_set) {
1317         Set *set;
1318         Iterator i;
1319         char *t;
1320         int r;
1321
1322         assert(s);
1323         assert(_set);
1324
1325         if (s->socket_fd >= 0)
1326                 return 0;
1327
1328         if (!set_isempty(s->configured_sockets))
1329                 return 0;
1330
1331         /* Collects all Socket objects that belong to this
1332          * service. Note that a service might have multiple sockets
1333          * via multiple names. */
1334
1335         if (!(set = set_new(NULL, NULL)))
1336                 return -ENOMEM;
1337
1338         SET_FOREACH(t, s->meta.names, i) {
1339                 char *k;
1340                 Unit *p;
1341
1342                 /* Look for all socket objects that go by any of our
1343                  * units and collect their fds */
1344
1345                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1346                         r = -ENOMEM;
1347                         goto fail;
1348                 }
1349
1350                 p = manager_get_unit(s->meta.manager, k);
1351                 free(k);
1352
1353                 if (!p)
1354                         continue;
1355
1356                 if ((r = set_put(set, p)) < 0)
1357                         goto fail;
1358         }
1359
1360         *_set = set;
1361         return 0;
1362
1363 fail:
1364         set_free(set);
1365         return r;
1366 }
1367
1368 static int service_notify_sockets_dead(Service *s) {
1369         Iterator i;
1370         Set *set, *free_set = NULL;
1371         Socket *sock;
1372         int r;
1373
1374         assert(s);
1375
1376         /* Notifies all our sockets when we die */
1377
1378         if (s->socket_fd >= 0)
1379                 return 0;
1380
1381         if (!set_isempty(s->configured_sockets))
1382                 set = s->configured_sockets;
1383         else {
1384                 if ((r = service_get_sockets(s, &free_set)) < 0)
1385                         return r;
1386
1387                 set = free_set;
1388         }
1389
1390         SET_FOREACH(sock, set, i)
1391                 socket_notify_service_dead(sock);
1392
1393         set_free(free_set);
1394
1395         return 0;
1396 }
1397
1398 static void service_set_state(Service *s, ServiceState state) {
1399         ServiceState old_state;
1400         assert(s);
1401
1402         old_state = s->state;
1403         s->state = state;
1404
1405         if (state != SERVICE_START_PRE &&
1406             state != SERVICE_START &&
1407             state != SERVICE_START_POST &&
1408             state != SERVICE_RELOAD &&
1409             state != SERVICE_STOP &&
1410             state != SERVICE_STOP_SIGTERM &&
1411             state != SERVICE_STOP_SIGKILL &&
1412             state != SERVICE_STOP_POST &&
1413             state != SERVICE_FINAL_SIGTERM &&
1414             state != SERVICE_FINAL_SIGKILL &&
1415             state != SERVICE_AUTO_RESTART)
1416                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1417
1418         if (state != SERVICE_START &&
1419             state != SERVICE_START_POST &&
1420             state != SERVICE_RUNNING &&
1421             state != SERVICE_RELOAD &&
1422             state != SERVICE_STOP &&
1423             state != SERVICE_STOP_SIGTERM &&
1424             state != SERVICE_STOP_SIGKILL) {
1425                 service_unwatch_main_pid(s);
1426                 s->main_command = NULL;
1427         }
1428
1429         if (state != SERVICE_START_PRE &&
1430             state != SERVICE_START &&
1431             state != SERVICE_START_POST &&
1432             state != SERVICE_RELOAD &&
1433             state != SERVICE_STOP &&
1434             state != SERVICE_STOP_SIGTERM &&
1435             state != SERVICE_STOP_SIGKILL &&
1436             state != SERVICE_STOP_POST &&
1437             state != SERVICE_FINAL_SIGTERM &&
1438             state != SERVICE_FINAL_SIGKILL) {
1439                 service_unwatch_control_pid(s);
1440                 s->control_command = NULL;
1441                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1442         }
1443
1444         if (state == SERVICE_DEAD ||
1445             state == SERVICE_STOP ||
1446             state == SERVICE_STOP_SIGTERM ||
1447             state == SERVICE_STOP_SIGKILL ||
1448             state == SERVICE_STOP_POST ||
1449             state == SERVICE_FINAL_SIGTERM ||
1450             state == SERVICE_FINAL_SIGKILL ||
1451             state == SERVICE_FAILED ||
1452             state == SERVICE_AUTO_RESTART)
1453                 service_notify_sockets_dead(s);
1454
1455         if (state != SERVICE_START_PRE &&
1456             state != SERVICE_START &&
1457             state != SERVICE_START_POST &&
1458             state != SERVICE_RUNNING &&
1459             state != SERVICE_RELOAD &&
1460             state != SERVICE_STOP &&
1461             state != SERVICE_STOP_SIGTERM &&
1462             state != SERVICE_STOP_SIGKILL &&
1463             state != SERVICE_STOP_POST &&
1464             state != SERVICE_FINAL_SIGTERM &&
1465             state != SERVICE_FINAL_SIGKILL &&
1466             !(state == SERVICE_DEAD && s->meta.job)) {
1467                 service_close_socket_fd(s);
1468                 service_connection_unref(s);
1469         }
1470
1471         /* For the inactive states unit_notify() will trim the cgroup,
1472          * but for exit we have to do that ourselves... */
1473         if (state == SERVICE_EXITED)
1474                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1475
1476         if (old_state != state)
1477                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1478
1479         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1480         s->reload_failure = false;
1481 }
1482
1483 static int service_coldplug(Unit *u) {
1484         Service *s = SERVICE(u);
1485         int r;
1486
1487         assert(s);
1488         assert(s->state == SERVICE_DEAD);
1489
1490         if (s->deserialized_state != s->state) {
1491
1492                 if (s->deserialized_state == SERVICE_START_PRE ||
1493                     s->deserialized_state == SERVICE_START ||
1494                     s->deserialized_state == SERVICE_START_POST ||
1495                     s->deserialized_state == SERVICE_RELOAD ||
1496                     s->deserialized_state == SERVICE_STOP ||
1497                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1498                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1499                     s->deserialized_state == SERVICE_STOP_POST ||
1500                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1501                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1502                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1503
1504                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1505                                 usec_t k;
1506
1507                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1508
1509                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1510                                         return r;
1511                         }
1512                 }
1513
1514                 if ((s->deserialized_state == SERVICE_START &&
1515                      (s->type == SERVICE_FORKING ||
1516                       s->type == SERVICE_DBUS ||
1517                       s->type == SERVICE_ONESHOT ||
1518                       s->type == SERVICE_NOTIFY)) ||
1519                     s->deserialized_state == SERVICE_START_POST ||
1520                     s->deserialized_state == SERVICE_RUNNING ||
1521                     s->deserialized_state == SERVICE_RELOAD ||
1522                     s->deserialized_state == SERVICE_STOP ||
1523                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1524                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1525                         if (s->main_pid > 0)
1526                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1527                                         return r;
1528
1529                 if (s->deserialized_state == SERVICE_START_PRE ||
1530                     s->deserialized_state == SERVICE_START ||
1531                     s->deserialized_state == SERVICE_START_POST ||
1532                     s->deserialized_state == SERVICE_RELOAD ||
1533                     s->deserialized_state == SERVICE_STOP ||
1534                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1535                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1536                     s->deserialized_state == SERVICE_STOP_POST ||
1537                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1538                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1539                         if (s->control_pid > 0)
1540                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1541                                         return r;
1542
1543                 service_set_state(s, s->deserialized_state);
1544         }
1545
1546         return 0;
1547 }
1548
1549 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1550         Iterator i;
1551         int r;
1552         int *rfds = NULL;
1553         unsigned rn_fds = 0;
1554         Set *set, *free_set = NULL;
1555         Socket *sock;
1556
1557         assert(s);
1558         assert(fds);
1559         assert(n_fds);
1560
1561         if (s->socket_fd >= 0)
1562                 return 0;
1563
1564         if (!set_isempty(s->configured_sockets))
1565                 set = s->configured_sockets;
1566         else {
1567                 if ((r = service_get_sockets(s, &free_set)) < 0)
1568                         return r;
1569
1570                 set = free_set;
1571         }
1572
1573         SET_FOREACH(sock, set, i) {
1574                 int *cfds;
1575                 unsigned cn_fds;
1576
1577                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1578                         goto fail;
1579
1580                 if (!cfds)
1581                         continue;
1582
1583                 if (!rfds) {
1584                         rfds = cfds;
1585                         rn_fds = cn_fds;
1586                 } else {
1587                         int *t;
1588
1589                         if (!(t = new(int, rn_fds+cn_fds))) {
1590                                 free(cfds);
1591                                 r = -ENOMEM;
1592                                 goto fail;
1593                         }
1594
1595                         memcpy(t, rfds, rn_fds * sizeof(int));
1596                         memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1597                         free(rfds);
1598                         free(cfds);
1599
1600                         rfds = t;
1601                         rn_fds = rn_fds+cn_fds;
1602                 }
1603         }
1604
1605         *fds = rfds;
1606         *n_fds = rn_fds;
1607
1608         set_free(free_set);
1609
1610         return 0;
1611
1612 fail:
1613         set_free(set);
1614         free(rfds);
1615
1616         return r;
1617 }
1618
1619 static int service_spawn(
1620                 Service *s,
1621                 ExecCommand *c,
1622                 bool timeout,
1623                 bool pass_fds,
1624                 bool apply_permissions,
1625                 bool apply_chroot,
1626                 bool apply_tty_stdin,
1627                 bool set_notify_socket,
1628                 pid_t *_pid) {
1629
1630         pid_t pid;
1631         int r;
1632         int *fds = NULL, *fdsbuf = NULL;
1633         unsigned n_fds = 0, n_env = 0;
1634         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1635
1636         assert(s);
1637         assert(c);
1638         assert(_pid);
1639
1640         if (pass_fds ||
1641             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1642             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1643             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1644
1645                 if (s->socket_fd >= 0) {
1646                         fds = &s->socket_fd;
1647                         n_fds = 1;
1648                 } else {
1649                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1650                                 goto fail;
1651
1652                         fds = fdsbuf;
1653                 }
1654         }
1655
1656         if (timeout && s->timeout_usec) {
1657                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1658                         goto fail;
1659         } else
1660                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1661
1662         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1663                 r = -ENOMEM;
1664                 goto fail;
1665         }
1666
1667         if (!(our_env = new0(char*, 4))) {
1668                 r = -ENOMEM;
1669                 goto fail;
1670         }
1671
1672         if (set_notify_socket)
1673                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", s->meta.manager->notify_socket) < 0) {
1674                         r = -ENOMEM;
1675                         goto fail;
1676                 }
1677
1678         if (s->main_pid > 0)
1679                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1680                         r = -ENOMEM;
1681                         goto fail;
1682                 }
1683
1684         if (!(final_env = strv_env_merge(2,
1685                                          s->meta.manager->environment,
1686                                          our_env,
1687                                          NULL))) {
1688                 r = -ENOMEM;
1689                 goto fail;
1690         }
1691
1692         r = exec_spawn(c,
1693                        argv,
1694                        &s->exec_context,
1695                        fds, n_fds,
1696                        final_env,
1697                        apply_permissions,
1698                        apply_chroot,
1699                        apply_tty_stdin,
1700                        s->meta.manager->confirm_spawn,
1701                        s->meta.cgroup_bondings,
1702                        &pid);
1703
1704         if (r < 0)
1705                 goto fail;
1706
1707
1708         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1709                 /* FIXME: we need to do something here */
1710                 goto fail;
1711
1712         free(fdsbuf);
1713         strv_free(argv);
1714         strv_free(our_env);
1715         strv_free(final_env);
1716
1717         *_pid = pid;
1718
1719         return 0;
1720
1721 fail:
1722         free(fdsbuf);
1723         strv_free(argv);
1724         strv_free(our_env);
1725         strv_free(final_env);
1726
1727         if (timeout)
1728                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1729
1730         return r;
1731 }
1732
1733 static int main_pid_good(Service *s) {
1734         assert(s);
1735
1736         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1737          * don't know */
1738
1739         /* If we know the pid file, then lets just check if it is
1740          * still valid */
1741         if (s->main_pid_known)
1742                 return s->main_pid > 0;
1743
1744         /* We don't know the pid */
1745         return -EAGAIN;
1746 }
1747
1748 static int control_pid_good(Service *s) {
1749         assert(s);
1750
1751         return s->control_pid > 0;
1752 }
1753
1754 static int cgroup_good(Service *s) {
1755         int r;
1756
1757         assert(s);
1758
1759         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1760                 return r;
1761
1762         return !r;
1763 }
1764
1765 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1766         int r;
1767         assert(s);
1768
1769         if (!success)
1770                 s->failure = true;
1771
1772         if (allow_restart &&
1773             !s->forbid_restart &&
1774             (s->restart == SERVICE_RESTART_ALWAYS ||
1775              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1776              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1777              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1778               (s->main_exec_status.code == CLD_KILLED ||
1779                s->main_exec_status.code == CLD_DUMPED)))) {
1780
1781                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1782                         goto fail;
1783
1784                 service_set_state(s, SERVICE_AUTO_RESTART);
1785         } else
1786                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1787
1788         s->forbid_restart = false;
1789
1790         return;
1791
1792 fail:
1793         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1794         service_enter_dead(s, false, false);
1795 }
1796
1797 static void service_enter_signal(Service *s, ServiceState state, bool success);
1798
1799 static void service_enter_stop_post(Service *s, bool success) {
1800         int r;
1801         assert(s);
1802
1803         if (!success)
1804                 s->failure = true;
1805
1806         service_unwatch_control_pid(s);
1807
1808         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1809                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1810
1811                 if ((r = service_spawn(s,
1812                                        s->control_command,
1813                                        true,
1814                                        false,
1815                                        !s->permissions_start_only,
1816                                        !s->root_directory_start_only,
1817                                        true,
1818                                        false,
1819                                        &s->control_pid)) < 0)
1820                         goto fail;
1821
1822
1823                 service_set_state(s, SERVICE_STOP_POST);
1824         } else
1825                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1826
1827         return;
1828
1829 fail:
1830         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1831         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1832 }
1833
1834 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1835         int r;
1836         Set *pid_set = NULL;
1837         bool wait_for_exit = false;
1838
1839         assert(s);
1840
1841         if (!success)
1842                 s->failure = true;
1843
1844         if (s->exec_context.kill_mode != KILL_NONE) {
1845                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1846
1847                 if (s->main_pid > 0) {
1848                         if (kill_and_sigcont(s->main_pid, sig) < 0 && errno != ESRCH)
1849                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1850                         else
1851                                 wait_for_exit = true;
1852                 }
1853
1854                 if (s->control_pid > 0) {
1855                         if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1856
1857                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1858                         else
1859                                 wait_for_exit = true;
1860                 }
1861
1862                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1863
1864                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1865                                 r = -ENOMEM;
1866                                 goto fail;
1867                         }
1868
1869                         /* Exclude the main/control pids from being killed via the cgroup */
1870                         if (s->main_pid > 0)
1871                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1872                                         goto fail;
1873
1874                         if (s->control_pid > 0)
1875                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1876                                         goto fail;
1877
1878                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
1879                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1880                                         log_warning("Failed to kill control group: %s", strerror(-r));
1881                         } else if (r > 0)
1882                                 wait_for_exit = true;
1883
1884                         set_free(pid_set);
1885                         pid_set = NULL;
1886                 }
1887         }
1888
1889         if (wait_for_exit) {
1890                 if (s->timeout_usec > 0)
1891                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1892                                 goto fail;
1893
1894                 service_set_state(s, state);
1895         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1896                 service_enter_stop_post(s, true);
1897         else
1898                 service_enter_dead(s, true, true);
1899
1900         return;
1901
1902 fail:
1903         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1904
1905         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1906                 service_enter_stop_post(s, false);
1907         else
1908                 service_enter_dead(s, false, true);
1909
1910         if (pid_set)
1911                 set_free(pid_set);
1912 }
1913
1914 static void service_enter_stop(Service *s, bool success) {
1915         int r;
1916
1917         assert(s);
1918
1919         if (!success)
1920                 s->failure = true;
1921
1922         service_unwatch_control_pid(s);
1923
1924         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1925                 s->control_command_id = SERVICE_EXEC_STOP;
1926
1927                 if ((r = service_spawn(s,
1928                                        s->control_command,
1929                                        true,
1930                                        false,
1931                                        !s->permissions_start_only,
1932                                        !s->root_directory_start_only,
1933                                        false,
1934                                        false,
1935                                        &s->control_pid)) < 0)
1936                         goto fail;
1937
1938                 service_set_state(s, SERVICE_STOP);
1939         } else
1940                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1941
1942         return;
1943
1944 fail:
1945         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1946         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1947 }
1948
1949 static void service_enter_running(Service *s, bool success) {
1950         int main_pid_ok, cgroup_ok;
1951         assert(s);
1952
1953         if (!success)
1954                 s->failure = true;
1955
1956         main_pid_ok = main_pid_good(s);
1957         cgroup_ok = cgroup_good(s);
1958
1959         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1960             (s->bus_name_good || s->type != SERVICE_DBUS))
1961                 service_set_state(s, SERVICE_RUNNING);
1962         else if (s->remain_after_exit)
1963                 service_set_state(s, SERVICE_EXITED);
1964         else
1965                 service_enter_stop(s, true);
1966 }
1967
1968 static void service_enter_start_post(Service *s) {
1969         int r;
1970         assert(s);
1971
1972         service_unwatch_control_pid(s);
1973
1974         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1975                 s->control_command_id = SERVICE_EXEC_START_POST;
1976
1977                 if ((r = service_spawn(s,
1978                                        s->control_command,
1979                                        true,
1980                                        false,
1981                                        !s->permissions_start_only,
1982                                        !s->root_directory_start_only,
1983                                        false,
1984                                        false,
1985                                        &s->control_pid)) < 0)
1986                         goto fail;
1987
1988                 service_set_state(s, SERVICE_START_POST);
1989         } else
1990                 service_enter_running(s, true);
1991
1992         return;
1993
1994 fail:
1995         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1996         service_enter_stop(s, false);
1997 }
1998
1999 static void service_enter_start(Service *s) {
2000         pid_t pid;
2001         int r;
2002         ExecCommand *c;
2003
2004         assert(s);
2005
2006         assert(s->exec_command[SERVICE_EXEC_START]);
2007         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2008
2009         if (s->type == SERVICE_FORKING)
2010                 service_unwatch_control_pid(s);
2011         else
2012                 service_unwatch_main_pid(s);
2013
2014         if (s->type == SERVICE_FORKING) {
2015                 s->control_command_id = SERVICE_EXEC_START;
2016                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2017
2018                 s->main_command = NULL;
2019         } else {
2020                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2021                 s->control_command = NULL;
2022
2023                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2024         }
2025
2026         if ((r = service_spawn(s,
2027                                c,
2028                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2029                                true,
2030                                true,
2031                                true,
2032                                true,
2033                                s->notify_access != NOTIFY_NONE,
2034                                &pid)) < 0)
2035                 goto fail;
2036
2037         if (s->type == SERVICE_SIMPLE) {
2038                 /* For simple services we immediately start
2039                  * the START_POST binaries. */
2040
2041                 service_set_main_pid(s, pid);
2042                 service_enter_start_post(s);
2043
2044         } else  if (s->type == SERVICE_FORKING) {
2045
2046                 /* For forking services we wait until the start
2047                  * process exited. */
2048
2049                 s->control_pid = pid;
2050                 service_set_state(s, SERVICE_START);
2051
2052         } else if (s->type == SERVICE_ONESHOT ||
2053                    s->type == SERVICE_DBUS ||
2054                    s->type == SERVICE_NOTIFY) {
2055
2056                 /* For oneshot services we wait until the start
2057                  * process exited, too, but it is our main process. */
2058
2059                 /* For D-Bus services we know the main pid right away,
2060                  * but wait for the bus name to appear on the
2061                  * bus. Notify services are similar. */
2062
2063                 service_set_main_pid(s, pid);
2064                 service_set_state(s, SERVICE_START);
2065         } else
2066                 assert_not_reached("Unknown service type");
2067
2068         return;
2069
2070 fail:
2071         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2072         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2073 }
2074
2075 static void service_enter_start_pre(Service *s) {
2076         int r;
2077
2078         assert(s);
2079
2080         service_unwatch_control_pid(s);
2081
2082         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2083                 s->control_command_id = SERVICE_EXEC_START_PRE;
2084
2085                 if ((r = service_spawn(s,
2086                                        s->control_command,
2087                                        true,
2088                                        false,
2089                                        !s->permissions_start_only,
2090                                        !s->root_directory_start_only,
2091                                        true,
2092                                        false,
2093                                        &s->control_pid)) < 0)
2094                         goto fail;
2095
2096                 service_set_state(s, SERVICE_START_PRE);
2097         } else
2098                 service_enter_start(s);
2099
2100         return;
2101
2102 fail:
2103         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2104         service_enter_dead(s, false, true);
2105 }
2106
2107 static void service_enter_restart(Service *s) {
2108         int r;
2109         DBusError error;
2110
2111         assert(s);
2112         dbus_error_init(&error);
2113
2114         if (s->meta.job) {
2115                 log_info("Job pending for unit, delaying automatic restart.");
2116
2117                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2118                         goto fail;
2119         }
2120
2121         service_enter_dead(s, true, false);
2122
2123         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2124                 goto fail;
2125
2126         log_debug("%s scheduled restart job.", s->meta.id);
2127         return;
2128
2129 fail:
2130         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2131         service_enter_dead(s, false, false);
2132
2133         dbus_error_free(&error);
2134 }
2135
2136 static void service_enter_reload(Service *s) {
2137         int r;
2138
2139         assert(s);
2140
2141         service_unwatch_control_pid(s);
2142
2143         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2144                 s->control_command_id = SERVICE_EXEC_RELOAD;
2145
2146                 if ((r = service_spawn(s,
2147                                        s->control_command,
2148                                        true,
2149                                        false,
2150                                        !s->permissions_start_only,
2151                                        !s->root_directory_start_only,
2152                                        false,
2153                                        false,
2154                                        &s->control_pid)) < 0)
2155                         goto fail;
2156
2157                 service_set_state(s, SERVICE_RELOAD);
2158         } else
2159                 service_enter_running(s, true);
2160
2161         return;
2162
2163 fail:
2164         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2165         s->reload_failure = true;
2166         service_enter_running(s, true);
2167 }
2168
2169 static void service_run_next_control(Service *s, bool success) {
2170         int r;
2171
2172         assert(s);
2173         assert(s->control_command);
2174         assert(s->control_command->command_next);
2175
2176         if (!success)
2177                 s->failure = true;
2178
2179         assert(s->control_command_id != SERVICE_EXEC_START);
2180
2181         s->control_command = s->control_command->command_next;
2182         service_unwatch_control_pid(s);
2183
2184         if ((r = service_spawn(s,
2185                                s->control_command,
2186                                true,
2187                                false,
2188                                !s->permissions_start_only,
2189                                !s->root_directory_start_only,
2190                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2191                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2192                                false,
2193                                &s->control_pid)) < 0)
2194                 goto fail;
2195
2196         return;
2197
2198 fail:
2199         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2200
2201         if (s->state == SERVICE_START_PRE)
2202                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2203         else if (s->state == SERVICE_STOP)
2204                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2205         else if (s->state == SERVICE_STOP_POST)
2206                 service_enter_dead(s, false, true);
2207         else if (s->state == SERVICE_RELOAD) {
2208                 s->reload_failure = true;
2209                 service_enter_running(s, true);
2210         } else
2211                 service_enter_stop(s, false);
2212 }
2213
2214 static void service_run_next_main(Service *s, bool success) {
2215         pid_t pid;
2216         int r;
2217
2218         assert(s);
2219         assert(s->main_command);
2220         assert(s->main_command->command_next);
2221         assert(s->type == SERVICE_ONESHOT);
2222
2223         if (!success)
2224                 s->failure = true;
2225
2226         s->main_command = s->main_command->command_next;
2227         service_unwatch_main_pid(s);
2228
2229         if ((r = service_spawn(s,
2230                                s->main_command,
2231                                false,
2232                                true,
2233                                true,
2234                                true,
2235                                true,
2236                                s->notify_access != NOTIFY_NONE,
2237                                &pid)) < 0)
2238                 goto fail;
2239
2240         service_set_main_pid(s, pid);
2241
2242         return;
2243
2244 fail:
2245         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2246         service_enter_stop(s, false);
2247 }
2248
2249 static int service_start(Unit *u) {
2250         Service *s = SERVICE(u);
2251
2252         assert(s);
2253
2254         /* We cannot fulfill this request right now, try again later
2255          * please! */
2256         if (s->state == SERVICE_STOP ||
2257             s->state == SERVICE_STOP_SIGTERM ||
2258             s->state == SERVICE_STOP_SIGKILL ||
2259             s->state == SERVICE_STOP_POST ||
2260             s->state == SERVICE_FINAL_SIGTERM ||
2261             s->state == SERVICE_FINAL_SIGKILL)
2262                 return -EAGAIN;
2263
2264         /* Already on it! */
2265         if (s->state == SERVICE_START_PRE ||
2266             s->state == SERVICE_START ||
2267             s->state == SERVICE_START_POST)
2268                 return 0;
2269
2270         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2271
2272         /* Make sure we don't enter a busy loop of some kind. */
2273         if (!ratelimit_test(&s->ratelimit)) {
2274                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2275                 return -ECANCELED;
2276         }
2277
2278         s->failure = false;
2279         s->main_pid_known = false;
2280         s->forbid_restart = false;
2281
2282         service_enter_start_pre(s);
2283         return 0;
2284 }
2285
2286 static int service_stop(Unit *u) {
2287         Service *s = SERVICE(u);
2288
2289         assert(s);
2290
2291         /* This is a user request, so don't do restarts on this
2292          * shutdown. */
2293         s->forbid_restart = true;
2294
2295         /* Already on it */
2296         if (s->state == SERVICE_STOP ||
2297             s->state == SERVICE_STOP_SIGTERM ||
2298             s->state == SERVICE_STOP_SIGKILL ||
2299             s->state == SERVICE_STOP_POST ||
2300             s->state == SERVICE_FINAL_SIGTERM ||
2301             s->state == SERVICE_FINAL_SIGKILL)
2302                 return 0;
2303
2304         /* Don't allow a restart */
2305         if (s->state == SERVICE_AUTO_RESTART) {
2306                 service_set_state(s, SERVICE_DEAD);
2307                 return 0;
2308         }
2309
2310         /* If there's already something running we go directly into
2311          * kill mode. */
2312         if (s->state == SERVICE_START_PRE ||
2313             s->state == SERVICE_START ||
2314             s->state == SERVICE_START_POST ||
2315             s->state == SERVICE_RELOAD) {
2316                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2317                 return 0;
2318         }
2319
2320         assert(s->state == SERVICE_RUNNING ||
2321                s->state == SERVICE_EXITED);
2322
2323         service_enter_stop(s, true);
2324         return 0;
2325 }
2326
2327 static int service_reload(Unit *u) {
2328         Service *s = SERVICE(u);
2329
2330         assert(s);
2331
2332         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2333
2334         service_enter_reload(s);
2335         return 0;
2336 }
2337
2338 static bool service_can_reload(Unit *u) {
2339         Service *s = SERVICE(u);
2340
2341         assert(s);
2342
2343         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2344 }
2345
2346 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2347         Service *s = SERVICE(u);
2348
2349         assert(u);
2350         assert(f);
2351         assert(fds);
2352
2353         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2354         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2355
2356         if (s->control_pid > 0)
2357                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2358
2359         if (s->main_pid_known && s->main_pid > 0)
2360                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2361
2362         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2363
2364         if (s->status_text)
2365                 unit_serialize_item(u, f, "status-text", s->status_text);
2366
2367         /* There's a minor uncleanliness here: if there are multiple
2368          * commands attached here, we will start from the first one
2369          * again */
2370         if (s->control_command_id >= 0)
2371                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2372
2373         if (s->socket_fd >= 0) {
2374                 int copy;
2375
2376                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2377                         return copy;
2378
2379                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2380         }
2381
2382         if (s->main_exec_status.pid > 0) {
2383                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2384                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2385                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2386
2387                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2388                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2389                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2390                 }
2391         }
2392
2393         return 0;
2394 }
2395
2396 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2397         Service *s = SERVICE(u);
2398
2399         assert(u);
2400         assert(key);
2401         assert(value);
2402         assert(fds);
2403
2404         if (streq(key, "state")) {
2405                 ServiceState state;
2406
2407                 if ((state = service_state_from_string(value)) < 0)
2408                         log_debug("Failed to parse state value %s", value);
2409                 else
2410                         s->deserialized_state = state;
2411         } else if (streq(key, "failure")) {
2412                 int b;
2413
2414                 if ((b = parse_boolean(value)) < 0)
2415                         log_debug("Failed to parse failure value %s", value);
2416                 else
2417                         s->failure = b || s->failure;
2418         } else if (streq(key, "control-pid")) {
2419                 pid_t pid;
2420
2421                 if (parse_pid(value, &pid) < 0)
2422                         log_debug("Failed to parse control-pid value %s", value);
2423                 else
2424                         s->control_pid = pid;
2425         } else if (streq(key, "main-pid")) {
2426                 pid_t pid;
2427
2428                 if (parse_pid(value, &pid) < 0)
2429                         log_debug("Failed to parse main-pid value %s", value);
2430                 else
2431                         service_set_main_pid(s, (pid_t) pid);
2432         } else if (streq(key, "main-pid-known")) {
2433                 int b;
2434
2435                 if ((b = parse_boolean(value)) < 0)
2436                         log_debug("Failed to parse main-pid-known value %s", value);
2437                 else
2438                         s->main_pid_known = b;
2439         } else if (streq(key, "status-text")) {
2440                 char *t;
2441
2442                 if ((t = strdup(value))) {
2443                         free(s->status_text);
2444                         s->status_text = t;
2445                 }
2446
2447         } else if (streq(key, "control-command")) {
2448                 ServiceExecCommand id;
2449
2450                 if ((id = service_exec_command_from_string(value)) < 0)
2451                         log_debug("Failed to parse exec-command value %s", value);
2452                 else {
2453                         s->control_command_id = id;
2454                         s->control_command = s->exec_command[id];
2455                 }
2456         } else if (streq(key, "socket-fd")) {
2457                 int fd;
2458
2459                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2460                         log_debug("Failed to parse socket-fd value %s", value);
2461                 else {
2462
2463                         if (s->socket_fd >= 0)
2464                                 close_nointr_nofail(s->socket_fd);
2465                         s->socket_fd = fdset_remove(fds, fd);
2466                 }
2467         } else if (streq(key, "main-exec-status-pid")) {
2468                 pid_t pid;
2469
2470                 if (parse_pid(value, &pid) < 0)
2471                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2472                 else
2473                         s->main_exec_status.pid = pid;
2474         } else if (streq(key, "main-exec-status-code")) {
2475                 int i;
2476
2477                 if (safe_atoi(value, &i) < 0)
2478                         log_debug("Failed to parse main-exec-status-code value %s", value);
2479                 else
2480                         s->main_exec_status.code = i;
2481         } else if (streq(key, "main-exec-status-status")) {
2482                 int i;
2483
2484                 if (safe_atoi(value, &i) < 0)
2485                         log_debug("Failed to parse main-exec-status-status value %s", value);
2486                 else
2487                         s->main_exec_status.status = i;
2488         } else if (streq(key, "main-exec-status-start"))
2489                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2490         else if (streq(key, "main-exec-status-exit"))
2491                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2492         else
2493                 log_debug("Unknown serialization key '%s'", key);
2494
2495         return 0;
2496 }
2497
2498 static UnitActiveState service_active_state(Unit *u) {
2499         assert(u);
2500
2501         return state_translation_table[SERVICE(u)->state];
2502 }
2503
2504 static const char *service_sub_state_to_string(Unit *u) {
2505         assert(u);
2506
2507         return service_state_to_string(SERVICE(u)->state);
2508 }
2509
2510 static bool service_check_gc(Unit *u) {
2511         Service *s = SERVICE(u);
2512
2513         assert(s);
2514
2515         /* Never clean up services that still have a process around,
2516          * even if the service is formally dead. */
2517         if (cgroup_good(s) > 0 ||
2518             main_pid_good(s) > 0 ||
2519             control_pid_good(s) > 0)
2520                 return true;
2521
2522 #ifdef HAVE_SYSV_COMPAT
2523         if (s->sysv_path)
2524                 return true;
2525 #endif
2526
2527         return false;
2528 }
2529
2530 static bool service_check_snapshot(Unit *u) {
2531         Service *s = SERVICE(u);
2532
2533         assert(s);
2534
2535         return !s->got_socket_fd;
2536 }
2537
2538 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2539         Service *s = SERVICE(u);
2540         bool success;
2541
2542         assert(s);
2543         assert(pid >= 0);
2544
2545         if (!s->meta.fragment_path)
2546                 success = is_clean_exit_lsb(code, status);
2547         else
2548                 success = is_clean_exit(code, status);
2549
2550         if (s->main_pid == pid) {
2551
2552                 s->main_pid = 0;
2553                 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2554
2555                 /* If this is not a forking service than the main
2556                  * process got started and hence we copy the exit
2557                  * status so that it is recorded both as main and as
2558                  * control process exit status */
2559                 if (s->main_command) {
2560                         s->main_command->exec_status = s->main_exec_status;
2561
2562                         if (s->main_command->ignore)
2563                                 success = true;
2564                 }
2565
2566                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2567                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2568                 s->failure = s->failure || !success;
2569
2570                 if (s->main_command &&
2571                     s->main_command->command_next &&
2572                     success) {
2573
2574                         /* There is another command to *
2575                          * execute, so let's do that. */
2576
2577                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2578                         service_run_next_main(s, success);
2579
2580                 } else {
2581
2582                         /* The service exited, so the service is officially
2583                          * gone. */
2584                         s->main_command = NULL;
2585
2586                         switch (s->state) {
2587
2588                         case SERVICE_START_POST:
2589                         case SERVICE_RELOAD:
2590                         case SERVICE_STOP:
2591                                 /* Need to wait until the operation is
2592                                  * done */
2593                                 break;
2594
2595                         case SERVICE_START:
2596                                 if (s->type == SERVICE_ONESHOT) {
2597                                         /* This was our main goal, so let's go on */
2598                                         if (success)
2599                                                 service_enter_start_post(s);
2600                                         else
2601                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2602                                         break;
2603                                 } else {
2604                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2605
2606                                         /* Fall through */
2607                                 }
2608
2609                         case SERVICE_RUNNING:
2610                                 service_enter_running(s, success);
2611                                 break;
2612
2613                         case SERVICE_STOP_SIGTERM:
2614                         case SERVICE_STOP_SIGKILL:
2615
2616                                 if (!control_pid_good(s))
2617                                         service_enter_stop_post(s, success);
2618
2619                                 /* If there is still a control process, wait for that first */
2620                                 break;
2621
2622                         default:
2623                                 assert_not_reached("Uh, main process died at wrong time.");
2624                         }
2625                 }
2626
2627         } else if (s->control_pid == pid) {
2628
2629                 s->control_pid = 0;
2630
2631                 if (s->control_command) {
2632                         exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2633
2634                         if (s->control_command->ignore)
2635                                 success = true;
2636                 }
2637
2638                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2639                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2640                 s->failure = s->failure || !success;
2641
2642                 if (s->control_command &&
2643                     s->control_command->command_next &&
2644                     success) {
2645
2646                         /* There is another command to *
2647                          * execute, so let's do that. */
2648
2649                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2650                         service_run_next_control(s, success);
2651
2652                 } else {
2653                         /* No further commands for this step, so let's
2654                          * figure out what to do next */
2655
2656                         s->control_command = NULL;
2657                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2658
2659                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2660
2661                         switch (s->state) {
2662
2663                         case SERVICE_START_PRE:
2664                                 if (success)
2665                                         service_enter_start(s);
2666                                 else
2667                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2668                                 break;
2669
2670                         case SERVICE_START:
2671                                 assert(s->type == SERVICE_FORKING);
2672
2673                                 /* Let's try to load the pid
2674                                  * file here if we can. We
2675                                  * ignore the return value,
2676                                  * since the PID file might
2677                                  * actually be created by a
2678                                  * START_POST script */
2679
2680                                 if (success) {
2681                                         service_load_pid_file(s);
2682                                         service_search_main_pid(s);
2683
2684                                         service_enter_start_post(s);
2685                                 } else
2686                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2687
2688                                 break;
2689
2690                         case SERVICE_START_POST:
2691                                 if (success && s->pid_file && !s->main_pid_known) {
2692                                         int r;
2693
2694                                         /* Hmm, let's see if we can
2695                                          * load the pid now after the
2696                                          * start-post scripts got
2697                                          * executed. */
2698
2699                                         if ((r = service_load_pid_file(s)) < 0)
2700                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2701                                 }
2702
2703                                 s->reload_failure = !success;
2704                                 service_enter_running(s, true);
2705                                 break;
2706
2707                         case SERVICE_RELOAD:
2708                                 if (success) {
2709                                         service_load_pid_file(s);
2710                                         service_search_main_pid(s);
2711                                 }
2712
2713                                 s->reload_failure = !success;
2714                                 service_enter_running(s, true);
2715                                 break;
2716
2717                         case SERVICE_STOP:
2718                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2719                                 break;
2720
2721                         case SERVICE_STOP_SIGTERM:
2722                         case SERVICE_STOP_SIGKILL:
2723                                 if (main_pid_good(s) <= 0)
2724                                         service_enter_stop_post(s, success);
2725
2726                                 /* If there is still a service
2727                                  * process around, wait until
2728                                  * that one quit, too */
2729                                 break;
2730
2731                         case SERVICE_STOP_POST:
2732                         case SERVICE_FINAL_SIGTERM:
2733                         case SERVICE_FINAL_SIGKILL:
2734                                 service_enter_dead(s, success, true);
2735                                 break;
2736
2737                         default:
2738                                 assert_not_reached("Uh, control process died at wrong time.");
2739                         }
2740                 }
2741         }
2742
2743         /* Notify clients about changed exit status */
2744         unit_add_to_dbus_queue(u);
2745 }
2746
2747 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2748         Service *s = SERVICE(u);
2749
2750         assert(s);
2751         assert(elapsed == 1);
2752
2753         assert(w == &s->timer_watch);
2754
2755         switch (s->state) {
2756
2757         case SERVICE_START_PRE:
2758         case SERVICE_START:
2759                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2760                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2761                 break;
2762
2763         case SERVICE_START_POST:
2764                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2765                 service_enter_stop(s, false);
2766                 break;
2767
2768         case SERVICE_RELOAD:
2769                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2770                 s->reload_failure = true;
2771                 service_enter_running(s, true);
2772                 break;
2773
2774         case SERVICE_STOP:
2775                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2776                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2777                 break;
2778
2779         case SERVICE_STOP_SIGTERM:
2780                 if (s->exec_context.send_sigkill) {
2781                         log_warning("%s stopping timed out. Killing.", u->meta.id);
2782                         service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2783                 } else {
2784                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2785                         service_enter_stop_post(s, false);
2786                 }
2787
2788                 break;
2789
2790         case SERVICE_STOP_SIGKILL:
2791                 /* Uh, we sent a SIGKILL and it is still not gone?
2792                  * Must be something we cannot kill, so let's just be
2793                  * weirded out and continue */
2794
2795                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2796                 service_enter_stop_post(s, false);
2797                 break;
2798
2799         case SERVICE_STOP_POST:
2800                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2801                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2802                 break;
2803
2804         case SERVICE_FINAL_SIGTERM:
2805                 if (s->exec_context.send_sigkill) {
2806                         log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2807                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2808                 } else {
2809                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2810                         service_enter_dead(s, false, true);
2811                 }
2812
2813                 break;
2814
2815         case SERVICE_FINAL_SIGKILL:
2816                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2817                 service_enter_dead(s, false, true);
2818                 break;
2819
2820         case SERVICE_AUTO_RESTART:
2821                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2822                 service_enter_restart(s);
2823                 break;
2824
2825         default:
2826                 assert_not_reached("Timeout at wrong time.");
2827         }
2828 }
2829
2830 static void service_cgroup_notify_event(Unit *u) {
2831         Service *s = SERVICE(u);
2832
2833         assert(u);
2834
2835         log_debug("%s: cgroup is empty", u->meta.id);
2836
2837         switch (s->state) {
2838
2839                 /* Waiting for SIGCHLD is usually more interesting,
2840                  * because it includes return codes/signals. Which is
2841                  * why we ignore the cgroup events for most cases,
2842                  * except when we don't know pid which to expect the
2843                  * SIGCHLD for. */
2844
2845         case SERVICE_RUNNING:
2846                 service_enter_running(s, true);
2847                 break;
2848
2849         case SERVICE_STOP_SIGTERM:
2850         case SERVICE_STOP_SIGKILL:
2851                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2852                         service_enter_stop_post(s, true);
2853
2854                 break;
2855
2856         case SERVICE_FINAL_SIGTERM:
2857         case SERVICE_FINAL_SIGKILL:
2858                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2859                         service_enter_dead(s, true, true);
2860
2861                 break;
2862
2863         default:
2864                 ;
2865         }
2866 }
2867
2868 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2869         Service *s = SERVICE(u);
2870         const char *e;
2871
2872         assert(u);
2873
2874         if (s->notify_access == NOTIFY_NONE) {
2875                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2876                             u->meta.id, (unsigned long) pid);
2877                 return;
2878         }
2879
2880         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2881                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2882                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2883                 return;
2884         }
2885
2886         log_debug("%s: Got message", u->meta.id);
2887
2888         /* Interpret MAINPID= */
2889         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2890             (s->state == SERVICE_START ||
2891              s->state == SERVICE_START_POST ||
2892              s->state == SERVICE_RUNNING ||
2893              s->state == SERVICE_RELOAD)) {
2894
2895                 if (parse_pid(e + 8, &pid) < 0)
2896                         log_warning("Failed to parse notification message %s", e);
2897                 else {
2898                         log_debug("%s: got %s", u->meta.id, e);
2899                         service_set_main_pid(s, pid);
2900                 }
2901         }
2902
2903         /* Interpret READY= */
2904         if (s->type == SERVICE_NOTIFY &&
2905             s->state == SERVICE_START &&
2906             strv_find(tags, "READY=1")) {
2907                 log_debug("%s: got READY=1", u->meta.id);
2908
2909                 service_enter_start_post(s);
2910         }
2911
2912         /* Interpret STATUS= */
2913         if ((e = strv_find_prefix(tags, "STATUS="))) {
2914                 char *t;
2915
2916                 if (e[7]) {
2917                         if (!(t = strdup(e+7))) {
2918                                 log_error("Failed to allocate string.");
2919                                 return;
2920                         }
2921
2922                         log_debug("%s: got %s", u->meta.id, e);
2923
2924                         free(s->status_text);
2925                         s->status_text = t;
2926                 } else {
2927                         free(s->status_text);
2928                         s->status_text = NULL;
2929                 }
2930
2931         }
2932
2933         /* Notify clients about changed status or main pid */
2934         unit_add_to_dbus_queue(u);
2935 }
2936
2937 #ifdef HAVE_SYSV_COMPAT
2938 static int service_enumerate(Manager *m) {
2939         char **p;
2940         unsigned i;
2941         DIR *d = NULL;
2942         char *path = NULL, *fpath = NULL, *name = NULL;
2943         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2944         Unit *service;
2945         Iterator j;
2946         int r;
2947
2948         assert(m);
2949
2950         zero(runlevel_services);
2951
2952         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2953                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2954                         struct dirent *de;
2955
2956                         free(path);
2957                         path = NULL;
2958                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2959                                 r = -ENOMEM;
2960                                 goto finish;
2961                         }
2962
2963                         if (d)
2964                                 closedir(d);
2965
2966                         if (!(d = opendir(path))) {
2967                                 if (errno != ENOENT)
2968                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2969
2970                                 continue;
2971                         }
2972
2973                         while ((de = readdir(d))) {
2974                                 int a, b;
2975
2976                                 if (ignore_file(de->d_name))
2977                                         continue;
2978
2979                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2980                                         continue;
2981
2982                                 if (strlen(de->d_name) < 4)
2983                                         continue;
2984
2985                                 a = undecchar(de->d_name[1]);
2986                                 b = undecchar(de->d_name[2]);
2987
2988                                 if (a < 0 || b < 0)
2989                                         continue;
2990
2991                                 free(fpath);
2992                                 fpath = NULL;
2993                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2994                                         r = -ENOMEM;
2995                                         goto finish;
2996                                 }
2997
2998                                 if (access(fpath, X_OK) < 0) {
2999
3000                                         if (errno != ENOENT)
3001                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3002
3003                                         continue;
3004                                 }
3005
3006                                 free(name);
3007                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
3008                                         r = -ENOMEM;
3009                                         goto finish;
3010                                 }
3011
3012                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
3013                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3014                                         continue;
3015                                 }
3016
3017                                 if (de->d_name[0] == 'S')  {
3018
3019                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
3020                                                 SERVICE(service)->sysv_start_priority_from_rcnd =
3021                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3022
3023                                                 SERVICE(service)->sysv_enabled = true;
3024                                         }
3025
3026                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3027                                                 goto finish;
3028
3029                                         if ((r = set_put(runlevel_services[i], service)) < 0)
3030                                                 goto finish;
3031
3032                                 } else if (de->d_name[0] == 'K' &&
3033                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
3034                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3035
3036                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3037                                                 goto finish;
3038
3039                                         if ((r = set_put(shutdown_services, service)) < 0)
3040                                                 goto finish;
3041                                 }
3042                         }
3043                 }
3044
3045         /* Now we loaded all stubs and are aware of the lowest
3046         start-up priority for all services, not let's actually load
3047         the services, this will also tell us which services are
3048         actually native now */
3049         manager_dispatch_load_queue(m);
3050
3051         /* If this is a native service, rely on native ways to pull in
3052          * a service, don't pull it in via sysv rcN.d links. */
3053         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3054                 SET_FOREACH(service, runlevel_services[i], j) {
3055                         service = unit_follow_merge(service);
3056
3057                         if (service->meta.fragment_path)
3058                                 continue;
3059
3060                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3061                                 goto finish;
3062                 }
3063
3064         /* We honour K links only for halt/reboot. For the normal
3065          * runlevels we assume the stop jobs will be implicitly added
3066          * by the core logic. Also, we don't really distinguish here
3067          * between the runlevels 0 and 6 and just add them to the
3068          * special shutdown target. On SUSE the boot.d/ runlevel is
3069          * also used for shutdown, so we add links for that too to the
3070          * shutdown target.*/
3071         SET_FOREACH(service, shutdown_services, j) {
3072                 service = unit_follow_merge(service);
3073
3074                 if (service->meta.fragment_path)
3075                         continue;
3076
3077                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3078                         goto finish;
3079         }
3080
3081         r = 0;
3082
3083 finish:
3084         free(path);
3085         free(fpath);
3086         free(name);
3087
3088         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3089                 set_free(runlevel_services[i]);
3090         set_free(shutdown_services);
3091
3092         if (d)
3093                 closedir(d);
3094
3095         return r;
3096 }
3097 #endif
3098
3099 static void service_bus_name_owner_change(
3100                 Unit *u,
3101                 const char *name,
3102                 const char *old_owner,
3103                 const char *new_owner) {
3104
3105         Service *s = SERVICE(u);
3106
3107         assert(s);
3108         assert(name);
3109
3110         assert(streq(s->bus_name, name));
3111         assert(old_owner || new_owner);
3112
3113         if (old_owner && new_owner)
3114                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3115         else if (old_owner)
3116                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3117         else
3118                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3119
3120         s->bus_name_good = !!new_owner;
3121
3122         if (s->type == SERVICE_DBUS) {
3123
3124                 /* service_enter_running() will figure out what to
3125                  * do */
3126                 if (s->state == SERVICE_RUNNING)
3127                         service_enter_running(s, true);
3128                 else if (s->state == SERVICE_START && new_owner)
3129                         service_enter_start_post(s);
3130
3131         } else if (new_owner &&
3132                    s->main_pid <= 0 &&
3133                    (s->state == SERVICE_START ||
3134                     s->state == SERVICE_START_POST ||
3135                     s->state == SERVICE_RUNNING ||
3136                     s->state == SERVICE_RELOAD)) {
3137
3138                 /* Try to acquire PID from bus service */
3139                 log_debug("Trying to acquire PID from D-Bus name...");
3140
3141                 bus_query_pid(u->meta.manager, name);
3142         }
3143 }
3144
3145 static void service_bus_query_pid_done(
3146                 Unit *u,
3147                 const char *name,
3148                 pid_t pid) {
3149
3150         Service *s = SERVICE(u);
3151
3152         assert(s);
3153         assert(name);
3154
3155         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3156
3157         if (s->main_pid <= 0 &&
3158             (s->state == SERVICE_START ||
3159              s->state == SERVICE_START_POST ||
3160              s->state == SERVICE_RUNNING ||
3161              s->state == SERVICE_RELOAD))
3162                 service_set_main_pid(s, pid);
3163 }
3164
3165 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3166         assert(s);
3167         assert(fd >= 0);
3168
3169         /* This is called by the socket code when instantiating a new
3170          * service for a stream socket and the socket needs to be
3171          * configured. */
3172
3173         if (s->meta.load_state != UNIT_LOADED)
3174                 return -EINVAL;
3175
3176         if (s->socket_fd >= 0)
3177                 return -EBUSY;
3178
3179         if (s->state != SERVICE_DEAD)
3180                 return -EAGAIN;
3181
3182         s->socket_fd = fd;
3183         s->got_socket_fd = true;
3184         s->accept_socket = sock;
3185
3186         return 0;
3187 }
3188
3189 static void service_reset_failed(Unit *u) {
3190         Service *s = SERVICE(u);
3191
3192         assert(s);
3193
3194         if (s->state == SERVICE_FAILED)
3195                 service_set_state(s, SERVICE_DEAD);
3196
3197         s->failure = false;
3198 }
3199
3200 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3201         Service *s = SERVICE(u);
3202         int r = 0;
3203         Set *pid_set = NULL;
3204
3205         assert(s);
3206
3207         if (s->main_pid <= 0 && who == KILL_MAIN) {
3208                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3209                 return -EINVAL;
3210         }
3211
3212         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3213                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3214                 return -ENOENT;
3215         }
3216
3217         if (s->control_pid > 0)
3218                 if (kill(s->control_pid, signo) < 0)
3219                         r = -errno;
3220
3221         if (s->main_pid > 0)
3222                 if (kill(s->main_pid, signo) < 0)
3223                         r = -errno;
3224
3225         if (mode == KILL_CONTROL_GROUP) {
3226                 int q;
3227
3228                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3229                         return -ENOMEM;
3230
3231                 /* Exclude the control/main pid from being killed via the cgroup */
3232                 if (s->control_pid > 0)
3233                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3234                                 r = q;
3235                                 goto finish;
3236                         }
3237
3238                 if (s->main_pid > 0)
3239                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3240                                 r = q;
3241                                 goto finish;
3242                         }
3243
3244                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, false, pid_set)) < 0)
3245                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3246                                 r = q;
3247         }
3248
3249 finish:
3250         if (pid_set)
3251                 set_free(pid_set);
3252
3253         return r;
3254 }
3255
3256 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3257         [SERVICE_DEAD] = "dead",
3258         [SERVICE_START_PRE] = "start-pre",
3259         [SERVICE_START] = "start",
3260         [SERVICE_START_POST] = "start-post",
3261         [SERVICE_RUNNING] = "running",
3262         [SERVICE_EXITED] = "exited",
3263         [SERVICE_RELOAD] = "reload",
3264         [SERVICE_STOP] = "stop",
3265         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3266         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3267         [SERVICE_STOP_POST] = "stop-post",
3268         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3269         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3270         [SERVICE_FAILED] = "failed",
3271         [SERVICE_AUTO_RESTART] = "auto-restart",
3272 };
3273
3274 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3275
3276 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3277         [SERVICE_RESTART_NO] = "no",
3278         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3279         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3280         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3281         [SERVICE_RESTART_ALWAYS] = "always"
3282 };
3283
3284 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3285
3286 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3287         [SERVICE_SIMPLE] = "simple",
3288         [SERVICE_FORKING] = "forking",
3289         [SERVICE_ONESHOT] = "oneshot",
3290         [SERVICE_DBUS] = "dbus",
3291         [SERVICE_NOTIFY] = "notify"
3292 };
3293
3294 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3295
3296 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3297         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3298         [SERVICE_EXEC_START] = "ExecStart",
3299         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3300         [SERVICE_EXEC_RELOAD] = "ExecReload",
3301         [SERVICE_EXEC_STOP] = "ExecStop",
3302         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3303 };
3304
3305 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3306
3307 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3308         [NOTIFY_NONE] = "none",
3309         [NOTIFY_MAIN] = "main",
3310         [NOTIFY_ALL] = "all"
3311 };
3312
3313 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3314
3315 const UnitVTable service_vtable = {
3316         .suffix = ".service",
3317         .show_status = true,
3318
3319         .init = service_init,
3320         .done = service_done,
3321         .load = service_load,
3322
3323         .coldplug = service_coldplug,
3324
3325         .dump = service_dump,
3326
3327         .start = service_start,
3328         .stop = service_stop,
3329         .reload = service_reload,
3330
3331         .can_reload = service_can_reload,
3332
3333         .kill = service_kill,
3334
3335         .serialize = service_serialize,
3336         .deserialize_item = service_deserialize_item,
3337
3338         .active_state = service_active_state,
3339         .sub_state_to_string = service_sub_state_to_string,
3340
3341         .check_gc = service_check_gc,
3342         .check_snapshot = service_check_snapshot,
3343
3344         .sigchld_event = service_sigchld_event,
3345         .timer_event = service_timer_event,
3346
3347         .reset_failed = service_reset_failed,
3348
3349         .cgroup_notify_empty = service_cgroup_notify_event,
3350         .notify_message = service_notify_message,
3351
3352         .bus_name_owner_change = service_bus_name_owner_change,
3353         .bus_query_pid_done = service_bus_query_pid_done,
3354
3355         .bus_interface = "org.freedesktop.systemd1.Service",
3356         .bus_message_handler = bus_service_message_handler,
3357         .bus_invalidating_properties =  bus_service_invalidating_properties,
3358
3359 #ifdef HAVE_SYSV_COMPAT
3360         .enumerate = service_enumerate
3361 #endif
3362 };