src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35 #include "special.h"
  36 #include "bus-errors.h"
  37 #include "exit-status.h"
  38
  39 #define COMMENTS "#;\n"
  40 #define NEWLINES "\n\r"
  41
  42 #ifdef HAVE_SYSV_COMPAT
  43
  44 #define DEFAULT_SYSV_TIMEOUT_USEC (3*USEC_PER_MINUTE)
  45
  46 typedef enum RunlevelType {
  47         RUNLEVEL_UP,
  48         RUNLEVEL_DOWN,
  49         RUNLEVEL_SYSINIT
  50 } RunlevelType;
  51
  52 static const struct {
  53         const char *path;
  54         const char *target;
  55         const RunlevelType type;
  56 } rcnd_table[] = {
  57         /* Standard SysV runlevels for start-up */
  58         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  59         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  60         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  61         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  62         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  63
  64 #ifdef TARGET_SUSE
  65         /* SUSE style boot.d */
  66         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  67 #endif
  68
  69 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_FRUGALWARE)
  70         /* Debian style rcS.d */
  71         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  72 #endif
  73
  74         /* Standard SysV runlevels for shutdown */
  75         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  76         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  77
  78         /* Note that the order here matters, as we read the
  79            directories in this order, and we want to make sure that
  80            sysv_start_priority is known when we first load the
  81            unit. And that value we only know from S links. Hence
  82            UP/SYSINIT must be read before DOWN */
  83 };
  84
  85 #define RUNLEVELS_UP "12345"
  86 /* #define RUNLEVELS_DOWN "06" */
  87 /* #define RUNLEVELS_BOOT "bBsS" */
  88 #endif
  89
  90 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  91         [SERVICE_DEAD] = UNIT_INACTIVE,
  92         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  93         [SERVICE_START] = UNIT_ACTIVATING,
  94         [SERVICE_START_POST] = UNIT_ACTIVATING,
  95         [SERVICE_RUNNING] = UNIT_ACTIVE,
  96         [SERVICE_EXITED] = UNIT_ACTIVE,
  97         [SERVICE_RELOAD] = UNIT_RELOADING,
  98         [SERVICE_STOP] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 101         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 103         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 104         [SERVICE_FAILED] = UNIT_FAILED,
 105         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 106 };
 107
 108 static void service_init(Unit *u) {
 109         Service *s = SERVICE(u);
 110
 111         assert(u);
 112         assert(u->meta.load_state == UNIT_STUB);
 113
 114         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 115         s->restart_usec = DEFAULT_RESTART_USEC;
 116         s->timer_watch.type = WATCH_INVALID;
 117 #ifdef HAVE_SYSV_COMPAT
 118         s->sysv_start_priority = -1;
 119 #endif
 120         s->socket_fd = -1;
 121         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                 "network",              SPECIAL_NETWORK_TARGET,
 279                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 280                 "portmap",              SPECIAL_RPCBIND_TARGET,
 281                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 282                 "syslog",               SPECIAL_SYSLOG_TARGET,
 283                 "time",                 SPECIAL_RTC_SET_TARGET,
 284
 285                 /* common extensions */
 286                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 287                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 288                 "null",                 NULL,
 289
 290 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 291                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 292 #endif
 293
 294 #ifdef TARGET_FEDORA
 295                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 296                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 297                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 298 #endif
 299
 300 #ifdef TARGET_SUSE
 301                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 302 #endif
 303         };
 304
 305         unsigned i;
 306         char *r;
 307         const char *n;
 308
 309         assert(name);
 310         assert(_r);
 311
 312         n = *name == '$' ? name + 1 : name;
 313
 314         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 315
 316                 if (!streq(table[i], n))
 317                         continue;
 318
 319                 if (!table[i+1])
 320                         return 0;
 321
 322                 if (!(r = strdup(table[i+1])))
 323                         return -ENOMEM;
 324
 325                 goto finish;
 326         }
 327
 328         /* If we don't know this name, fallback heuristics to figure
 329          * out whether something is a target or a service alias. */
 330
 331         if (*name == '$') {
 332                 if (!unit_prefix_is_valid(n))
 333                         return -EINVAL;
 334
 335                 /* Facilities starting with $ are most likely targets */
 336                 r = unit_name_build(n, NULL, ".target");
 337         } else if (filename && streq(name, filename))
 338                 /* Names equaling the file name of the services are redundant */
 339                 return 0;
 340         else
 341                 /* Everything else we assume to be normal service names */
 342                 r = sysv_translate_name(n);
 343
 344         if (!r)
 345                 return -ENOMEM;
 346
 347 finish:
 348         *_r = r;
 349
 350         return 1;
 351 }
 352
 353 static int sysv_fix_order(Service *s) {
 354         Meta *other;
 355         int r;
 356
 357         assert(s);
 358
 359         if (s->sysv_start_priority < 0)
 360                 return 0;
 361
 362         /* For each pair of services where at least one lacks a LSB
 363          * header, we use the start priority value to order things. */
 364
 365         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 366                 Service *t;
 367                 UnitDependency d;
 368                 bool special_s, special_t;
 369
 370                 t = (Service*) other;
 371
 372                 if (s == t)
 373                         continue;
 374
 375                 if (t->meta.load_state != UNIT_LOADED)
 376                         continue;
 377
 378                 if (t->sysv_start_priority < 0)
 379                         continue;
 380
 381                 /* If both units have modern headers we don't care
 382                  * about the priorities */
 383                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 384                     (t->meta.fragment_path || t->sysv_has_lsb))
 385                         continue;
 386
 387                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 388                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 389
 390                 if (special_t && !special_s)
 391                         d = UNIT_AFTER;
 392                 else if (special_s && !special_t)
 393                         d = UNIT_BEFORE;
 394                 else if (t->sysv_start_priority < s->sysv_start_priority)
 395                         d = UNIT_AFTER;
 396                 else if (t->sysv_start_priority > s->sysv_start_priority)
 397                         d = UNIT_BEFORE;
 398                 else
 399                         continue;
 400
 401                 /* FIXME: Maybe we should compare the name here lexicographically? */
 402
 403                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 404                         return r;
 405         }
 406
 407         return 0;
 408 }
 409
 410 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 411         ExecCommand *c;
 412
 413         if (!(c = new0(ExecCommand, 1)))
 414                 return NULL;
 415
 416         if (!(c->path = strdup(path))) {
 417                 free(c);
 418                 return NULL;
 419         }
 420
 421         if (!(c->argv = strv_new(path, arg1, NULL))) {
 422                 free(c->path);
 423                 free(c);
 424                 return NULL;
 425         }
 426
 427         return c;
 428 }
 429
 430 static int sysv_exec_commands(Service *s) {
 431         ExecCommand *c;
 432
 433         assert(s);
 434         assert(s->sysv_path);
 435
 436         if (!(c = exec_command_new(s->sysv_path, "start")))
 437                 return -ENOMEM;
 438         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 439
 440         if (!(c = exec_command_new(s->sysv_path, "stop")))
 441                 return -ENOMEM;
 442         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 443
 444         if (!(c = exec_command_new(s->sysv_path, "reload")))
 445                 return -ENOMEM;
 446         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 447
 448         return 0;
 449 }
 450
 451 static int service_load_sysv_path(Service *s, const char *path) {
 452         FILE *f;
 453         Unit *u;
 454         unsigned line = 0;
 455         int r;
 456         enum {
 457                 NORMAL,
 458                 DESCRIPTION,
 459                 LSB,
 460                 LSB_DESCRIPTION
 461         } state = NORMAL;
 462         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 463
 464         assert(s);
 465         assert(path);
 466
 467         u = UNIT(s);
 468
 469         if (!(f = fopen(path, "re"))) {
 470                 r = errno == ENOENT ? 0 : -errno;
 471                 goto finish;
 472         }
 473
 474         free(s->sysv_path);
 475         if (!(s->sysv_path = strdup(path))) {
 476                 r = -ENOMEM;
 477                 goto finish;
 478         }
 479
 480         while (!feof(f)) {
 481                 char l[LINE_MAX], *t;
 482
 483                 if (!fgets(l, sizeof(l), f)) {
 484                         if (feof(f))
 485                                 break;
 486
 487                         r = -errno;
 488                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 489                         goto finish;
 490                 }
 491
 492                 line++;
 493
 494                 t = strstrip(l);
 495                 if (*t != '#')
 496                         continue;
 497
 498                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 499                         state = LSB;
 500                         s->sysv_has_lsb = true;
 501                         continue;
 502                 }
 503
 504                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 505                         state = NORMAL;
 506                         continue;
 507                 }
 508
 509                 t++;
 510                 t += strspn(t, WHITESPACE);
 511
 512                 if (state == NORMAL) {
 513
 514                         /* Try to parse Red Hat style chkconfig headers */
 515
 516                         if (startswith_no_case(t, "chkconfig:")) {
 517                                 int start_priority;
 518                                 char runlevels[16], *k;
 519
 520                                 state = NORMAL;
 521
 522                                 if (sscanf(t+10, "%15s %i %*i",
 523                                            runlevels,
 524                                            &start_priority) != 2) {
 525
 526                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 527                                         continue;
 528                                 }
 529
 530                                 /* A start priority gathered from the
 531                                  * symlink farms is preferred over the
 532                                  * data from the LSB header. */
 533                                 if (start_priority < 0 || start_priority > 99)
 534                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 535                                 else if (s->sysv_start_priority < 0)
 536                                         s->sysv_start_priority = start_priority;
 537
 538                                 char_array_0(runlevels);
 539                                 k = delete_chars(runlevels, WHITESPACE "-");
 540
 541                                 if (k[0]) {
 542                                         char *d;
 543
 544                                         if (!(d = strdup(k))) {
 545                                                 r = -ENOMEM;
 546                                                 goto finish;
 547                                         }
 548
 549                                         free(s->sysv_runlevels);
 550                                         s->sysv_runlevels = d;
 551                                 }
 552
 553                         } else if (startswith_no_case(t, "description:")) {
 554
 555                                 size_t k = strlen(t);
 556                                 char *d;
 557                                 const char *j;
 558
 559                                 if (t[k-1] == '\\') {
 560                                         state = DESCRIPTION;
 561                                         t[k-1] = 0;
 562                                 }
 563
 564                                 if ((j = strstrip(t+12)) && *j) {
 565                                         if (!(d = strdup(j))) {
 566                                                 r = -ENOMEM;
 567                                                 goto finish;
 568                                         }
 569                                 } else
 570                                         d = NULL;
 571
 572                                 free(chkconfig_description);
 573                                 chkconfig_description = d;
 574
 575                         } else if (startswith_no_case(t, "pidfile:")) {
 576
 577                                 char *fn;
 578
 579                                 state = NORMAL;
 580
 581                                 fn = strstrip(t+8);
 582                                 if (!path_is_absolute(fn)) {
 583                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 584                                         continue;
 585                                 }
 586
 587                                 if (!(fn = strdup(fn))) {
 588                                         r = -ENOMEM;
 589                                         goto finish;
 590                                 }
 591
 592                                 free(s->pid_file);
 593                                 s->pid_file = fn;
 594                         }
 595
 596                 } else if (state == DESCRIPTION) {
 597
 598                         /* Try to parse Red Hat style description
 599                          * continuation */
 600
 601                         size_t k = strlen(t);
 602                         char *j;
 603
 604                         if (t[k-1] == '\\')
 605                                 t[k-1] = 0;
 606                         else
 607                                 state = NORMAL;
 608
 609                         if ((j = strstrip(t)) && *j) {
 610                                 char *d = NULL;
 611
 612                                 if (chkconfig_description)
 613                                         asprintf(&d, "%s %s", chkconfig_description, j);
 614                                 else
 615                                         d = strdup(j);
 616
 617                                 if (!d) {
 618                                         r = -ENOMEM;
 619                                         goto finish;
 620                                 }
 621
 622                                 free(chkconfig_description);
 623                                 chkconfig_description = d;
 624                         }
 625
 626                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 627
 628                         if (startswith_no_case(t, "Provides:")) {
 629                                 char *i, *w;
 630                                 size_t z;
 631
 632                                 state = LSB;
 633
 634                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 635                                         char *n, *m;
 636
 637                                         if (!(n = strndup(w, z))) {
 638                                                 r = -ENOMEM;
 639                                                 goto finish;
 640                                         }
 641
 642                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 643                                         free(n);
 644
 645                                         if (r < 0)
 646                                                 goto finish;
 647
 648                                         if (r == 0)
 649                                                 continue;
 650
 651                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 652                                                 r = unit_add_name(u, m);
 653                                         else {
 654                                                 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 655
 656                                                 if (s->sysv_enabled) {
 657                                                         int k;
 658
 659                                                         if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
 660                                                                 r = k;
 661                                                 }
 662                                         }
 663
 664                                         if (r < 0)
 665                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 666
 667                                         free(m);
 668                                 }
 669
 670                         } else if (startswith_no_case(t, "Required-Start:") ||
 671                                    startswith_no_case(t, "Should-Start:") ||
 672                                    startswith_no_case(t, "X-Start-Before:") ||
 673                                    startswith_no_case(t, "X-Start-After:")) {
 674                                 char *i, *w;
 675                                 size_t z;
 676
 677                                 state = LSB;
 678
 679                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 680                                         char *n, *m;
 681
 682                                         if (!(n = strndup(w, z))) {
 683                                                 r = -ENOMEM;
 684                                                 goto finish;
 685                                         }
 686
 687                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 688
 689                                         if (r < 0) {
 690                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
 691                                                 free(n);
 692                                                 continue;
 693                                         }
 694
 695                                         free(n);
 696
 697                                         if (r == 0)
 698                                                 continue;
 699
 700                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 701
 702                                         if (r < 0)
 703                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 704
 705                                         free(m);
 706                                 }
 707                         } else if (startswith_no_case(t, "Default-Start:")) {
 708                                 char *k, *d;
 709
 710                                 state = LSB;
 711
 712                                 k = delete_chars(t+14, WHITESPACE "-");
 713
 714                                 if (k[0] != 0) {
 715                                         if (!(d = strdup(k))) {
 716                                                 r = -ENOMEM;
 717                                                 goto finish;
 718                                         }
 719
 720                                         free(s->sysv_runlevels);
 721                                         s->sysv_runlevels = d;
 722                                 }
 723
 724                         } else if (startswith_no_case(t, "Description:")) {
 725                                 char *d, *j;
 726
 727                                 state = LSB_DESCRIPTION;
 728
 729                                 if ((j = strstrip(t+12)) && *j) {
 730                                         if (!(d = strdup(j))) {
 731                                                 r = -ENOMEM;
 732                                                 goto finish;
 733                                         }
 734                                 } else
 735                                         d = NULL;
 736
 737                                 free(long_description);
 738                                 long_description = d;
 739
 740                         } else if (startswith_no_case(t, "Short-Description:")) {
 741                                 char *d, *j;
 742
 743                                 state = LSB;
 744
 745                                 if ((j = strstrip(t+18)) && *j) {
 746                                         if (!(d = strdup(j))) {
 747                                                 r = -ENOMEM;
 748                                                 goto finish;
 749                                         }
 750                                 } else
 751                                         d = NULL;
 752
 753                                 free(short_description);
 754                                 short_description = d;
 755
 756                         } else if (startswith_no_case(t, "X-Interactive:")) {
 757                                 int b;
 758
 759                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 760                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 761                                         continue;
 762                                 }
 763
 764                                 if (b)
 765                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 766                                 else
 767                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 768
 769                         } else if (state == LSB_DESCRIPTION) {
 770
 771                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 772                                         char *j;
 773
 774                                         if ((j = strstrip(t)) && *j) {
 775                                                 char *d = NULL;
 776
 777                                                 if (long_description)
 778                                                         asprintf(&d, "%s %s", long_description, t);
 779                                                 else
 780                                                         d = strdup(j);
 781
 782                                                 if (!d) {
 783                                                         r = -ENOMEM;
 784                                                         goto finish;
 785                                                 }
 786
 787                                                 free(long_description);
 788                                                 long_description = d;
 789                                         }
 790
 791                                 } else
 792                                         state = LSB;
 793                         }
 794                 }
 795         }
 796
 797         if ((r = sysv_exec_commands(s)) < 0)
 798                 goto finish;
 799
 800         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 801                 /* If there a runlevels configured for this service
 802                  * but none of the standard ones, then we assume this
 803                  * is some special kind of service (which might be
 804                  * needed for early boot) and don't create any links
 805                  * to it. */
 806
 807                 s->meta.default_dependencies = false;
 808
 809                 /* Don't timeout special services during boot (like fsck) */
 810                 s->timeout_usec = 0;
 811         } else
 812                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 813
 814         /* Special setting for all SysV services */
 815         s->type = SERVICE_FORKING;
 816         s->remain_after_exit = true;
 817         s->restart = SERVICE_RESTART_NO;
 818         s->exec_context.std_output =
 819                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 820                 ? EXEC_OUTPUT_TTY : s->meta.manager->default_std_output;
 821         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 822
 823         /* We use the long description only if
 824          * no short description is set. */
 825
 826         if (short_description)
 827                 description = short_description;
 828         else if (chkconfig_description)
 829                 description = chkconfig_description;
 830         else if (long_description)
 831                 description = long_description;
 832         else
 833                 description = NULL;
 834
 835         if (description) {
 836                 char *d;
 837
 838                 if (!(d = strappend("LSB: ", description))) {
 839                         r = -ENOMEM;
 840                         goto finish;
 841                 }
 842
 843                 u->meta.description = d;
 844         }
 845
 846         u->meta.load_state = UNIT_LOADED;
 847         r = 0;
 848
 849 finish:
 850
 851         if (f)
 852                 fclose(f);
 853
 854         free(short_description);
 855         free(long_description);
 856         free(chkconfig_description);
 857
 858         return r;
 859 }
 860
 861 static int service_load_sysv_name(Service *s, const char *name) {
 862         char **p;
 863
 864         assert(s);
 865         assert(name);
 866
 867         /* For SysV services we strip the boot.*, rc.* and *.sh
 868          * prefixes/suffixes. */
 869 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 870         if (endswith(name, ".sh.service"))
 871                 return -ENOENT;
 872 #endif
 873
 874 #ifdef TARGET_SUSE
 875         if (startswith(name, "boot."))
 876                 return -ENOENT;
 877 #endif
 878
 879 #ifdef TARGET_FRUGALWARE
 880         if (startswith(name, "rc."))
 881                 return -ENOENT;
 882 #endif
 883
 884         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 885                 char *path;
 886                 int r;
 887
 888                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 889                         return -ENOMEM;
 890
 891                 assert(endswith(path, ".service"));
 892                 path[strlen(path)-8] = 0;
 893
 894                 r = service_load_sysv_path(s, path);
 895
 896 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU)
 897                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 898                         /* Try Debian style *.sh source'able init scripts */
 899                         strcat(path, ".sh");
 900                         r = service_load_sysv_path(s, path);
 901                 }
 902 #endif
 903                 free(path);
 904
 905 #ifdef TARGET_SUSE
 906                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 907                         /* Try SUSE style boot.* init scripts */
 908
 909                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 910                                 return -ENOMEM;
 911
 912                         /* Drop .service suffix */
 913                         path[strlen(path)-8] = 0;
 914                         r = service_load_sysv_path(s, path);
 915                         free(path);
 916                 }
 917 #endif
 918
 919 #ifdef TARGET_FRUGALWARE
 920                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 921                         /* Try Frugalware style rc.* init scripts */
 922
 923                         if (asprintf(&path, "%s/rc.%s", *p, name) < 0)
 924                                 return -ENOMEM;
 925
 926                         /* Drop .service suffix */
 927                         path[strlen(path)-8] = 0;
 928                         r = service_load_sysv_path(s, path);
 929                         free(path);
 930                 }
 931 #endif
 932
 933                 if (r < 0)
 934                         return r;
 935
 936                 if ((s->meta.load_state != UNIT_STUB))
 937                         break;
 938         }
 939
 940         return 0;
 941 }
 942
 943 static int service_load_sysv(Service *s) {
 944         const char *t;
 945         Iterator i;
 946         int r;
 947
 948         assert(s);
 949
 950         /* Load service data from SysV init scripts, preferably with
 951          * LSB headers ... */
 952
 953         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 954                 return 0;
 955
 956         if ((t = s->meta.id))
 957                 if ((r = service_load_sysv_name(s, t)) < 0)
 958                         return r;
 959
 960         if (s->meta.load_state == UNIT_STUB)
 961                 SET_FOREACH(t, s->meta.names, i) {
 962                         if (t == s->meta.id)
 963                                 continue;
 964
 965                         if ((r = service_load_sysv_name(s, t)) < 0)
 966                                 return r;
 967
 968                         if (s->meta.load_state != UNIT_STUB)
 969                                 break;
 970                 }
 971
 972         return 0;
 973 }
 974 #endif
 975
 976 static int fsck_fix_order(Service *s) {
 977         Meta *other;
 978         int r;
 979
 980         assert(s);
 981
 982         if (s->fsck_passno <= 0)
 983                 return 0;
 984
 985         /* For each pair of services where both have an fsck priority
 986          * we order things based on it. */
 987
 988         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 989                 Service *t;
 990                 UnitDependency d;
 991
 992                 t = (Service*) other;
 993
 994                 if (s == t)
 995                         continue;
 996
 997                 if (t->meta.load_state != UNIT_LOADED)
 998                         continue;
 999
1000                 if (t->fsck_passno <= 0)
1001                         continue;
1002
1003                 if (t->fsck_passno < s->fsck_passno)
1004                         d = UNIT_AFTER;
1005                 else if (t->fsck_passno > s->fsck_passno)
1006                         d = UNIT_BEFORE;
1007                 else
1008                         continue;
1009
1010                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1011                         return r;
1012         }
1013
1014         return 0;
1015 }
1016
1017 static int service_verify(Service *s) {
1018         assert(s);
1019
1020         if (s->meta.load_state != UNIT_LOADED)
1021                 return 0;
1022
1023         if (!s->exec_command[SERVICE_EXEC_START]) {
1024                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
1025                 return -EINVAL;
1026         }
1027
1028         if (s->type != SERVICE_ONESHOT &&
1029             s->exec_command[SERVICE_EXEC_START]->command_next) {
1030                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
1031                 return -EINVAL;
1032         }
1033
1034         if (s->type == SERVICE_ONESHOT &&
1035             s->exec_command[SERVICE_EXEC_RELOAD]) {
1036                 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", s->meta.id);
1037                 return -EINVAL;
1038         }
1039
1040         if (s->type == SERVICE_DBUS && !s->bus_name) {
1041                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
1042                 return -EINVAL;
1043         }
1044
1045         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1046                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
1047                 return -EINVAL;
1048         }
1049
1050         return 0;
1051 }
1052
1053 static int service_add_default_dependencies(Service *s) {
1054         int r;
1055
1056         assert(s);
1057
1058         /* Add a number of automatic dependencies useful for the
1059          * majority of services. */
1060
1061         /* First, pull in base system */
1062         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
1063
1064                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1065                         return r;
1066
1067         } else if (s->meta.manager->running_as == MANAGER_USER) {
1068
1069                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1070                         return r;
1071         }
1072
1073         /* Second, activate normal shutdown */
1074         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1075 }
1076
1077 static int service_load(Unit *u) {
1078         int r;
1079         Service *s = SERVICE(u);
1080
1081         assert(s);
1082
1083         /* Load a .service file */
1084         if ((r = unit_load_fragment(u)) < 0)
1085                 return r;
1086
1087 #ifdef HAVE_SYSV_COMPAT
1088         /* Load a classic init script as a fallback, if we couldn't find anything */
1089         if (u->meta.load_state == UNIT_STUB)
1090                 if ((r = service_load_sysv(s)) < 0)
1091                         return r;
1092 #endif
1093
1094         /* Still nothing found? Then let's give up */
1095         if (u->meta.load_state == UNIT_STUB)
1096                 return -ENOENT;
1097
1098         /* We were able to load something, then let's add in the
1099          * dropin directories. */
1100         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1101                 return r;
1102
1103         /* This is a new unit? Then let's add in some extras */
1104         if (u->meta.load_state == UNIT_LOADED) {
1105                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1106                         return r;
1107
1108                 if ((r = unit_add_default_cgroups(u)) < 0)
1109                         return r;
1110
1111 #ifdef HAVE_SYSV_COMPAT
1112                 if ((r = sysv_fix_order(s)) < 0)
1113                         return r;
1114 #endif
1115
1116                 if ((r = fsck_fix_order(s)) < 0)
1117                         return r;
1118
1119                 if (s->bus_name)
1120                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1121                                 return r;
1122
1123                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1124                         s->notify_access = NOTIFY_MAIN;
1125
1126                 if (s->type == SERVICE_DBUS || s->bus_name)
1127                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
1128                                 return r;
1129
1130                 if (s->meta.default_dependencies)
1131                         if ((r = service_add_default_dependencies(s)) < 0)
1132                                 return r;
1133         }
1134
1135         return service_verify(s);
1136 }
1137
1138 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1139
1140         ServiceExecCommand c;
1141         Service *s = SERVICE(u);
1142         const char *prefix2;
1143         char *p2;
1144
1145         assert(s);
1146
1147         p2 = strappend(prefix, "\t");
1148         prefix2 = p2 ? p2 : prefix;
1149
1150         fprintf(f,
1151                 "%sService State: %s\n"
1152                 "%sPermissionsStartOnly: %s\n"
1153                 "%sRootDirectoryStartOnly: %s\n"
1154                 "%sRemainAfterExit: %s\n"
1155                 "%sGuessMainPID: %s\n"
1156                 "%sType: %s\n"
1157                 "%sRestart: %s\n"
1158                 "%sNotifyAccess: %s\n",
1159                 prefix, service_state_to_string(s->state),
1160                 prefix, yes_no(s->permissions_start_only),
1161                 prefix, yes_no(s->root_directory_start_only),
1162                 prefix, yes_no(s->remain_after_exit),
1163                 prefix, yes_no(s->guess_main_pid),
1164                 prefix, service_type_to_string(s->type),
1165                 prefix, service_restart_to_string(s->restart),
1166                 prefix, notify_access_to_string(s->notify_access));
1167
1168         if (s->control_pid > 0)
1169                 fprintf(f,
1170                         "%sControl PID: %lu\n",
1171                         prefix, (unsigned long) s->control_pid);
1172
1173         if (s->main_pid > 0)
1174                 fprintf(f,
1175                         "%sMain PID: %lu\n",
1176                         prefix, (unsigned long) s->main_pid);
1177
1178         if (s->pid_file)
1179                 fprintf(f,
1180                         "%sPIDFile: %s\n",
1181                         prefix, s->pid_file);
1182
1183         if (s->bus_name)
1184                 fprintf(f,
1185                         "%sBusName: %s\n"
1186                         "%sBus Name Good: %s\n",
1187                         prefix, s->bus_name,
1188                         prefix, yes_no(s->bus_name_good));
1189
1190         exec_context_dump(&s->exec_context, f, prefix);
1191
1192         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1193
1194                 if (!s->exec_command[c])
1195                         continue;
1196
1197                 fprintf(f, "%s-> %s:\n",
1198                         prefix, service_exec_command_to_string(c));
1199
1200                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1201         }
1202
1203 #ifdef HAVE_SYSV_COMPAT
1204         if (s->sysv_path)
1205                 fprintf(f,
1206                         "%sSysV Init Script Path: %s\n"
1207                         "%sSysV Init Script has LSB Header: %s\n"
1208                         "%sSysVEnabled: %s\n",
1209                         prefix, s->sysv_path,
1210                         prefix, yes_no(s->sysv_has_lsb),
1211                         prefix, yes_no(s->sysv_enabled));
1212
1213         if (s->sysv_start_priority >= 0)
1214                 fprintf(f,
1215                         "%sSysVStartPriority: %i\n",
1216                         prefix, s->sysv_start_priority);
1217
1218         if (s->sysv_runlevels)
1219                 fprintf(f, "%sSysVRunLevels: %s\n",
1220                         prefix, s->sysv_runlevels);
1221 #endif
1222
1223         if (s->fsck_passno > 0)
1224                 fprintf(f,
1225                         "%sFsckPassNo: %i\n",
1226                         prefix, s->fsck_passno);
1227
1228         if (s->status_text)
1229                 fprintf(f, "%sStatus Text: %s\n",
1230                         prefix, s->status_text);
1231
1232         free(p2);
1233 }
1234
1235 static int service_load_pid_file(Service *s) {
1236         char *k;
1237         int r;
1238         pid_t pid;
1239
1240         assert(s);
1241
1242         if (!s->pid_file)
1243                 return -ENOENT;
1244
1245         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1246                 return r;
1247
1248         r = parse_pid(k, &pid);
1249         free(k);
1250
1251         if (r < 0)
1252                 return r;
1253
1254         if (kill(pid, 0) < 0 && errno != EPERM) {
1255                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1256                             (unsigned long) pid, s->pid_file);
1257                 return -ESRCH;
1258         }
1259
1260         if ((r = service_set_main_pid(s, pid)) < 0)
1261                 return r;
1262
1263         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1264                 /* FIXME: we need to do something here */
1265                 return r;
1266
1267         return 0;
1268 }
1269
1270 static int service_search_main_pid(Service *s) {
1271         pid_t pid;
1272         int r;
1273
1274         assert(s);
1275
1276         /* If we know it anyway, don't ever fallback to unreliable
1277          * heuristics */
1278         if (s->main_pid_known)
1279                 return 0;
1280
1281         if (!s->guess_main_pid)
1282                 return 0;
1283
1284         assert(s->main_pid <= 0);
1285
1286         if ((pid = cgroup_bonding_search_main_pid_list(s->meta.cgroup_bondings)) <= 0)
1287                 return -ENOENT;
1288
1289         if ((r = service_set_main_pid(s, pid)) < 0)
1290                 return r;
1291
1292         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1293                 /* FIXME: we need to do something here */
1294                 return r;
1295
1296         return 0;
1297 }
1298
1299 static int service_get_sockets(Service *s, Set **_set) {
1300         Set *set;
1301         Iterator i;
1302         char *t;
1303         int r;
1304
1305         assert(s);
1306         assert(_set);
1307
1308         if (s->socket_fd >= 0)
1309                 return 0;
1310
1311         if (!set_isempty(s->configured_sockets))
1312                 return 0;
1313
1314         /* Collects all Socket objects that belong to this
1315          * service. Note that a service might have multiple sockets
1316          * via multiple names. */
1317
1318         if (!(set = set_new(NULL, NULL)))
1319                 return -ENOMEM;
1320
1321         SET_FOREACH(t, s->meta.names, i) {
1322                 char *k;
1323                 Unit *p;
1324
1325                 /* Look for all socket objects that go by any of our
1326                  * units and collect their fds */
1327
1328                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1329                         r = -ENOMEM;
1330                         goto fail;
1331                 }
1332
1333                 p = manager_get_unit(s->meta.manager, k);
1334                 free(k);
1335
1336                 if (!p)
1337                         continue;
1338
1339                 if ((r = set_put(set, p)) < 0)
1340                         goto fail;
1341         }
1342
1343         *_set = set;
1344         return 0;
1345
1346 fail:
1347         set_free(set);
1348         return r;
1349 }
1350
1351 static int service_notify_sockets_dead(Service *s) {
1352         Iterator i;
1353         Set *set, *free_set = NULL;
1354         Socket *sock;
1355         int r;
1356
1357         assert(s);
1358
1359         /* Notifies all our sockets when we die */
1360
1361         if (s->socket_fd >= 0)
1362                 return 0;
1363
1364         if (!set_isempty(s->configured_sockets))
1365                 set = s->configured_sockets;
1366         else {
1367                 if ((r = service_get_sockets(s, &free_set)) < 0)
1368                         return r;
1369
1370                 set = free_set;
1371         }
1372
1373         SET_FOREACH(sock, set, i)
1374                 socket_notify_service_dead(sock);
1375
1376         set_free(free_set);
1377
1378         return 0;
1379 }
1380
1381 static void service_set_state(Service *s, ServiceState state) {
1382         ServiceState old_state;
1383         assert(s);
1384
1385         old_state = s->state;
1386         s->state = state;
1387
1388         if (state != SERVICE_START_PRE &&
1389             state != SERVICE_START &&
1390             state != SERVICE_START_POST &&
1391             state != SERVICE_RELOAD &&
1392             state != SERVICE_STOP &&
1393             state != SERVICE_STOP_SIGTERM &&
1394             state != SERVICE_STOP_SIGKILL &&
1395             state != SERVICE_STOP_POST &&
1396             state != SERVICE_FINAL_SIGTERM &&
1397             state != SERVICE_FINAL_SIGKILL &&
1398             state != SERVICE_AUTO_RESTART)
1399                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1400
1401         if (state != SERVICE_START &&
1402             state != SERVICE_START_POST &&
1403             state != SERVICE_RUNNING &&
1404             state != SERVICE_RELOAD &&
1405             state != SERVICE_STOP &&
1406             state != SERVICE_STOP_SIGTERM &&
1407             state != SERVICE_STOP_SIGKILL) {
1408                 service_unwatch_main_pid(s);
1409                 s->main_command = NULL;
1410         }
1411
1412         if (state != SERVICE_START_PRE &&
1413             state != SERVICE_START &&
1414             state != SERVICE_START_POST &&
1415             state != SERVICE_RELOAD &&
1416             state != SERVICE_STOP &&
1417             state != SERVICE_STOP_SIGTERM &&
1418             state != SERVICE_STOP_SIGKILL &&
1419             state != SERVICE_STOP_POST &&
1420             state != SERVICE_FINAL_SIGTERM &&
1421             state != SERVICE_FINAL_SIGKILL) {
1422                 service_unwatch_control_pid(s);
1423                 s->control_command = NULL;
1424                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1425         }
1426
1427         if (state == SERVICE_DEAD ||
1428             state == SERVICE_STOP ||
1429             state == SERVICE_STOP_SIGTERM ||
1430             state == SERVICE_STOP_SIGKILL ||
1431             state == SERVICE_STOP_POST ||
1432             state == SERVICE_FINAL_SIGTERM ||
1433             state == SERVICE_FINAL_SIGKILL ||
1434             state == SERVICE_FAILED ||
1435             state == SERVICE_AUTO_RESTART)
1436                 service_notify_sockets_dead(s);
1437
1438         if (state != SERVICE_START_PRE &&
1439             state != SERVICE_START &&
1440             state != SERVICE_START_POST &&
1441             state != SERVICE_RUNNING &&
1442             state != SERVICE_RELOAD &&
1443             state != SERVICE_STOP &&
1444             state != SERVICE_STOP_SIGTERM &&
1445             state != SERVICE_STOP_SIGKILL &&
1446             state != SERVICE_STOP_POST &&
1447             state != SERVICE_FINAL_SIGTERM &&
1448             state != SERVICE_FINAL_SIGKILL &&
1449             !(state == SERVICE_DEAD && s->meta.job)) {
1450                 service_close_socket_fd(s);
1451                 service_connection_unref(s);
1452         }
1453
1454         /* For the inactive states unit_notify() will trim the cgroup,
1455          * but for exit we have to do that ourselves... */
1456         if (state == SERVICE_EXITED)
1457                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1458
1459         if (old_state != state)
1460                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1461
1462         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1463         s->reload_failure = false;
1464 }
1465
1466 static int service_coldplug(Unit *u) {
1467         Service *s = SERVICE(u);
1468         int r;
1469
1470         assert(s);
1471         assert(s->state == SERVICE_DEAD);
1472
1473         if (s->deserialized_state != s->state) {
1474
1475                 if (s->deserialized_state == SERVICE_START_PRE ||
1476                     s->deserialized_state == SERVICE_START ||
1477                     s->deserialized_state == SERVICE_START_POST ||
1478                     s->deserialized_state == SERVICE_RELOAD ||
1479                     s->deserialized_state == SERVICE_STOP ||
1480                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1481                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1482                     s->deserialized_state == SERVICE_STOP_POST ||
1483                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1484                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1485                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1486
1487                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1488                                 usec_t k;
1489
1490                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1491
1492                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1493                                         return r;
1494                         }
1495                 }
1496
1497                 if ((s->deserialized_state == SERVICE_START &&
1498                      (s->type == SERVICE_FORKING ||
1499                       s->type == SERVICE_DBUS ||
1500                       s->type == SERVICE_ONESHOT ||
1501                       s->type == SERVICE_NOTIFY)) ||
1502                     s->deserialized_state == SERVICE_START_POST ||
1503                     s->deserialized_state == SERVICE_RUNNING ||
1504                     s->deserialized_state == SERVICE_RELOAD ||
1505                     s->deserialized_state == SERVICE_STOP ||
1506                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1507                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1508                         if (s->main_pid > 0)
1509                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1510                                         return r;
1511
1512                 if (s->deserialized_state == SERVICE_START_PRE ||
1513                     s->deserialized_state == SERVICE_START ||
1514                     s->deserialized_state == SERVICE_START_POST ||
1515                     s->deserialized_state == SERVICE_RELOAD ||
1516                     s->deserialized_state == SERVICE_STOP ||
1517                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1518                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1519                     s->deserialized_state == SERVICE_STOP_POST ||
1520                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1521                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1522                         if (s->control_pid > 0)
1523                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1524                                         return r;
1525
1526                 service_set_state(s, s->deserialized_state);
1527         }
1528
1529         return 0;
1530 }
1531
1532 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1533         Iterator i;
1534         int r;
1535         int *rfds = NULL;
1536         unsigned rn_fds = 0;
1537         Set *set, *free_set = NULL;
1538         Socket *sock;
1539
1540         assert(s);
1541         assert(fds);
1542         assert(n_fds);
1543
1544         if (s->socket_fd >= 0)
1545                 return 0;
1546
1547         if (!set_isempty(s->configured_sockets))
1548                 set = s->configured_sockets;
1549         else {
1550                 if ((r = service_get_sockets(s, &free_set)) < 0)
1551                         return r;
1552
1553                 set = free_set;
1554         }
1555
1556         SET_FOREACH(sock, set, i) {
1557                 int *cfds;
1558                 unsigned cn_fds;
1559
1560                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1561                         goto fail;
1562
1563                 if (!cfds)
1564                         continue;
1565
1566                 if (!rfds) {
1567                         rfds = cfds;
1568                         rn_fds = cn_fds;
1569                 } else {
1570                         int *t;
1571
1572                         if (!(t = new(int, rn_fds+cn_fds))) {
1573                                 free(cfds);
1574                                 r = -ENOMEM;
1575                                 goto fail;
1576                         }
1577
1578                         memcpy(t, rfds, rn_fds);
1579                         memcpy(t+rn_fds, cfds, cn_fds);
1580                         free(rfds);
1581                         free(cfds);
1582
1583                         rfds = t;
1584                         rn_fds = rn_fds+cn_fds;
1585                 }
1586         }
1587
1588         *fds = rfds;
1589         *n_fds = rn_fds;
1590
1591         set_free(free_set);
1592
1593         return 0;
1594
1595 fail:
1596         set_free(set);
1597         free(rfds);
1598
1599         return r;
1600 }
1601
1602 static int service_spawn(
1603                 Service *s,
1604                 ExecCommand *c,
1605                 bool timeout,
1606                 bool pass_fds,
1607                 bool apply_permissions,
1608                 bool apply_chroot,
1609                 bool apply_tty_stdin,
1610                 bool set_notify_socket,
1611                 pid_t *_pid) {
1612
1613         pid_t pid;
1614         int r;
1615         int *fds = NULL, *fdsbuf = NULL;
1616         unsigned n_fds = 0, n_env = 0;
1617         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1618
1619         assert(s);
1620         assert(c);
1621         assert(_pid);
1622
1623         if (pass_fds ||
1624             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1625             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1626             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1627
1628                 if (s->socket_fd >= 0) {
1629                         fds = &s->socket_fd;
1630                         n_fds = 1;
1631                 } else {
1632                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1633                                 goto fail;
1634
1635                         fds = fdsbuf;
1636                 }
1637         }
1638
1639         if (timeout && s->timeout_usec) {
1640                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1641                         goto fail;
1642         } else
1643                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1644
1645         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1646                 r = -ENOMEM;
1647                 goto fail;
1648         }
1649
1650         if (!(our_env = new0(char*, 4))) {
1651                 r = -ENOMEM;
1652                 goto fail;
1653         }
1654
1655         if (set_notify_socket)
1656                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1657                         r = -ENOMEM;
1658                         goto fail;
1659                 }
1660
1661         if (s->main_pid > 0)
1662                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1663                         r = -ENOMEM;
1664                         goto fail;
1665                 }
1666
1667         if (!(final_env = strv_env_merge(2,
1668                                          s->meta.manager->environment,
1669                                          our_env,
1670                                          NULL))) {
1671                 r = -ENOMEM;
1672                 goto fail;
1673         }
1674
1675         r = exec_spawn(c,
1676                        argv,
1677                        &s->exec_context,
1678                        fds, n_fds,
1679                        final_env,
1680                        apply_permissions,
1681                        apply_chroot,
1682                        apply_tty_stdin,
1683                        s->meta.manager->confirm_spawn,
1684                        s->meta.cgroup_bondings,
1685                        &pid);
1686
1687         if (r < 0)
1688                 goto fail;
1689
1690
1691         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1692                 /* FIXME: we need to do something here */
1693                 goto fail;
1694
1695         free(fdsbuf);
1696         strv_free(argv);
1697         strv_free(our_env);
1698         strv_free(final_env);
1699
1700         *_pid = pid;
1701
1702         return 0;
1703
1704 fail:
1705         free(fdsbuf);
1706         strv_free(argv);
1707         strv_free(our_env);
1708         strv_free(final_env);
1709
1710         if (timeout)
1711                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1712
1713         return r;
1714 }
1715
1716 static int main_pid_good(Service *s) {
1717         assert(s);
1718
1719         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1720          * don't know */
1721
1722         /* If we know the pid file, then lets just check if it is
1723          * still valid */
1724         if (s->main_pid_known)
1725                 return s->main_pid > 0;
1726
1727         /* We don't know the pid */
1728         return -EAGAIN;
1729 }
1730
1731 static int control_pid_good(Service *s) {
1732         assert(s);
1733
1734         return s->control_pid > 0;
1735 }
1736
1737 static int cgroup_good(Service *s) {
1738         int r;
1739
1740         assert(s);
1741
1742         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1743                 return r;
1744
1745         return !r;
1746 }
1747
1748 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1749         int r;
1750         assert(s);
1751
1752         if (!success)
1753                 s->failure = true;
1754
1755         if (allow_restart &&
1756             !s->forbid_restart &&
1757             (s->restart == SERVICE_RESTART_ALWAYS ||
1758              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1759              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1760              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1761               (s->main_exec_status.code == CLD_KILLED ||
1762                s->main_exec_status.code == CLD_DUMPED)))) {
1763
1764                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1765                         goto fail;
1766
1767                 service_set_state(s, SERVICE_AUTO_RESTART);
1768         } else
1769                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1770
1771         s->forbid_restart = false;
1772
1773         return;
1774
1775 fail:
1776         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1777         service_enter_dead(s, false, false);
1778 }
1779
1780 static void service_enter_signal(Service *s, ServiceState state, bool success);
1781
1782 static void service_enter_stop_post(Service *s, bool success) {
1783         int r;
1784         assert(s);
1785
1786         if (!success)
1787                 s->failure = true;
1788
1789         service_unwatch_control_pid(s);
1790
1791         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1792                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1793
1794                 if ((r = service_spawn(s,
1795                                        s->control_command,
1796                                        true,
1797                                        false,
1798                                        !s->permissions_start_only,
1799                                        !s->root_directory_start_only,
1800                                        true,
1801                                        false,
1802                                        &s->control_pid)) < 0)
1803                         goto fail;
1804
1805
1806                 service_set_state(s, SERVICE_STOP_POST);
1807         } else
1808                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1809
1810         return;
1811
1812 fail:
1813         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1814         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1815 }
1816
1817 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1818         int r;
1819         Set *pid_set = NULL;
1820         bool wait_for_exit = false;
1821
1822         assert(s);
1823
1824         if (!success)
1825                 s->failure = true;
1826
1827         if (s->exec_context.kill_mode != KILL_NONE) {
1828                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1829
1830                 if (s->main_pid > 0) {
1831                         if (kill_and_sigcont(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1832                                              -s->main_pid :
1833                                              s->main_pid, sig) < 0 && errno != ESRCH)
1834
1835                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1836                         else
1837                                 wait_for_exit = true;
1838                 }
1839
1840                 if (s->control_pid > 0) {
1841                         if (kill_and_sigcont(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1842                                              -s->control_pid :
1843                                              s->control_pid, sig) < 0 && errno != ESRCH)
1844
1845                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1846                         else
1847                                 wait_for_exit = true;
1848                 }
1849
1850                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1851
1852                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1853                                 r = -ENOMEM;
1854                                 goto fail;
1855                         }
1856
1857                         /* Exclude the main/control pids from being killed via the cgroup */
1858                         if (s->main_pid > 0)
1859                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1860                                         goto fail;
1861
1862                         if (s->control_pid > 0)
1863                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1864                                         goto fail;
1865
1866                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, true, pid_set)) < 0) {
1867                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1868                                         log_warning("Failed to kill control group: %s", strerror(-r));
1869                         } else if (r > 0)
1870                                 wait_for_exit = true;
1871
1872                         set_free(pid_set);
1873                 }
1874         }
1875
1876         if (wait_for_exit) {
1877                 if (s->timeout_usec > 0)
1878                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1879                                 goto fail;
1880
1881                 service_set_state(s, state);
1882         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1883                 service_enter_stop_post(s, true);
1884         else
1885                 service_enter_dead(s, true, true);
1886
1887         return;
1888
1889 fail:
1890         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1891
1892         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1893                 service_enter_stop_post(s, false);
1894         else
1895                 service_enter_dead(s, false, true);
1896
1897         if (pid_set)
1898                 set_free(pid_set);
1899 }
1900
1901 static void service_enter_stop(Service *s, bool success) {
1902         int r;
1903
1904         assert(s);
1905
1906         if (!success)
1907                 s->failure = true;
1908
1909         service_unwatch_control_pid(s);
1910
1911         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1912                 s->control_command_id = SERVICE_EXEC_STOP;
1913
1914                 if ((r = service_spawn(s,
1915                                        s->control_command,
1916                                        true,
1917                                        false,
1918                                        !s->permissions_start_only,
1919                                        !s->root_directory_start_only,
1920                                        false,
1921                                        false,
1922                                        &s->control_pid)) < 0)
1923                         goto fail;
1924
1925                 service_set_state(s, SERVICE_STOP);
1926         } else
1927                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1928
1929         return;
1930
1931 fail:
1932         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1933         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1934 }
1935
1936 static void service_enter_running(Service *s, bool success) {
1937         int main_pid_ok, cgroup_ok;
1938         assert(s);
1939
1940         if (!success)
1941                 s->failure = true;
1942
1943         main_pid_ok = main_pid_good(s);
1944         cgroup_ok = cgroup_good(s);
1945
1946         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1947             (s->bus_name_good || s->type != SERVICE_DBUS))
1948                 service_set_state(s, SERVICE_RUNNING);
1949         else if (s->remain_after_exit)
1950                 service_set_state(s, SERVICE_EXITED);
1951         else
1952                 service_enter_stop(s, true);
1953 }
1954
1955 static void service_enter_start_post(Service *s) {
1956         int r;
1957         assert(s);
1958
1959         service_unwatch_control_pid(s);
1960
1961         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1962                 s->control_command_id = SERVICE_EXEC_START_POST;
1963
1964                 if ((r = service_spawn(s,
1965                                        s->control_command,
1966                                        true,
1967                                        false,
1968                                        !s->permissions_start_only,
1969                                        !s->root_directory_start_only,
1970                                        false,
1971                                        false,
1972                                        &s->control_pid)) < 0)
1973                         goto fail;
1974
1975                 service_set_state(s, SERVICE_START_POST);
1976         } else
1977                 service_enter_running(s, true);
1978
1979         return;
1980
1981 fail:
1982         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1983         service_enter_stop(s, false);
1984 }
1985
1986 static void service_enter_start(Service *s) {
1987         pid_t pid;
1988         int r;
1989         ExecCommand *c;
1990
1991         assert(s);
1992
1993         assert(s->exec_command[SERVICE_EXEC_START]);
1994         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1995
1996         if (s->type == SERVICE_FORKING)
1997                 service_unwatch_control_pid(s);
1998         else
1999                 service_unwatch_main_pid(s);
2000
2001         if (s->type == SERVICE_FORKING) {
2002                 s->control_command_id = SERVICE_EXEC_START;
2003                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2004
2005                 s->main_command = NULL;
2006         } else {
2007                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2008                 s->control_command = NULL;
2009
2010                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2011         }
2012
2013         if ((r = service_spawn(s,
2014                                c,
2015                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2016                                true,
2017                                true,
2018                                true,
2019                                true,
2020                                s->notify_access != NOTIFY_NONE,
2021                                &pid)) < 0)
2022                 goto fail;
2023
2024         if (s->type == SERVICE_SIMPLE) {
2025                 /* For simple services we immediately start
2026                  * the START_POST binaries. */
2027
2028                 service_set_main_pid(s, pid);
2029                 service_enter_start_post(s);
2030
2031         } else  if (s->type == SERVICE_FORKING) {
2032
2033                 /* For forking services we wait until the start
2034                  * process exited. */
2035
2036                 s->control_pid = pid;
2037                 service_set_state(s, SERVICE_START);
2038
2039         } else if (s->type == SERVICE_ONESHOT ||
2040                    s->type == SERVICE_DBUS ||
2041                    s->type == SERVICE_NOTIFY) {
2042
2043                 /* For oneshot services we wait until the start
2044                  * process exited, too, but it is our main process. */
2045
2046                 /* For D-Bus services we know the main pid right away,
2047                  * but wait for the bus name to appear on the
2048                  * bus. Notify services are similar. */
2049
2050                 service_set_main_pid(s, pid);
2051                 service_set_state(s, SERVICE_START);
2052         } else
2053                 assert_not_reached("Unknown service type");
2054
2055         return;
2056
2057 fail:
2058         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
2059         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2060 }
2061
2062 static void service_enter_start_pre(Service *s) {
2063         int r;
2064
2065         assert(s);
2066
2067         service_unwatch_control_pid(s);
2068
2069         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2070                 s->control_command_id = SERVICE_EXEC_START_PRE;
2071
2072                 if ((r = service_spawn(s,
2073                                        s->control_command,
2074                                        true,
2075                                        false,
2076                                        !s->permissions_start_only,
2077                                        !s->root_directory_start_only,
2078                                        true,
2079                                        false,
2080                                        &s->control_pid)) < 0)
2081                         goto fail;
2082
2083                 service_set_state(s, SERVICE_START_PRE);
2084         } else
2085                 service_enter_start(s);
2086
2087         return;
2088
2089 fail:
2090         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
2091         service_enter_dead(s, false, true);
2092 }
2093
2094 static void service_enter_restart(Service *s) {
2095         int r;
2096         DBusError error;
2097
2098         assert(s);
2099         dbus_error_init(&error);
2100
2101         if (s->meta.job) {
2102                 log_info("Job pending for unit, delaying automatic restart.");
2103
2104                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2105                         goto fail;
2106         }
2107
2108         service_enter_dead(s, true, false);
2109
2110         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2111                 goto fail;
2112
2113         log_debug("%s scheduled restart job.", s->meta.id);
2114         return;
2115
2116 fail:
2117         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
2118         service_enter_dead(s, false, false);
2119
2120         dbus_error_free(&error);
2121 }
2122
2123 static void service_enter_reload(Service *s) {
2124         int r;
2125
2126         assert(s);
2127
2128         service_unwatch_control_pid(s);
2129
2130         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2131                 s->control_command_id = SERVICE_EXEC_RELOAD;
2132
2133                 if ((r = service_spawn(s,
2134                                        s->control_command,
2135                                        true,
2136                                        false,
2137                                        !s->permissions_start_only,
2138                                        !s->root_directory_start_only,
2139                                        false,
2140                                        false,
2141                                        &s->control_pid)) < 0)
2142                         goto fail;
2143
2144                 service_set_state(s, SERVICE_RELOAD);
2145         } else
2146                 service_enter_running(s, true);
2147
2148         return;
2149
2150 fail:
2151         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
2152         s->reload_failure = true;
2153         service_enter_running(s, true);
2154 }
2155
2156 static void service_run_next_control(Service *s, bool success) {
2157         int r;
2158
2159         assert(s);
2160         assert(s->control_command);
2161         assert(s->control_command->command_next);
2162
2163         if (!success)
2164                 s->failure = true;
2165
2166         assert(s->control_command_id != SERVICE_EXEC_START);
2167
2168         s->control_command = s->control_command->command_next;
2169         service_unwatch_control_pid(s);
2170
2171         if ((r = service_spawn(s,
2172                                s->control_command,
2173                                true,
2174                                false,
2175                                !s->permissions_start_only,
2176                                !s->root_directory_start_only,
2177                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2178                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2179                                false,
2180                                &s->control_pid)) < 0)
2181                 goto fail;
2182
2183         return;
2184
2185 fail:
2186         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
2187
2188         if (s->state == SERVICE_START_PRE)
2189                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2190         else if (s->state == SERVICE_STOP)
2191                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2192         else if (s->state == SERVICE_STOP_POST)
2193                 service_enter_dead(s, false, true);
2194         else if (s->state == SERVICE_RELOAD) {
2195                 s->reload_failure = true;
2196                 service_enter_running(s, true);
2197         } else
2198                 service_enter_stop(s, false);
2199 }
2200
2201 static void service_run_next_main(Service *s, bool success) {
2202         pid_t pid;
2203         int r;
2204
2205         assert(s);
2206         assert(s->main_command);
2207         assert(s->main_command->command_next);
2208         assert(s->type == SERVICE_ONESHOT);
2209
2210         if (!success)
2211                 s->failure = true;
2212
2213         s->main_command = s->main_command->command_next;
2214         service_unwatch_main_pid(s);
2215
2216         if ((r = service_spawn(s,
2217                                s->main_command,
2218                                false,
2219                                true,
2220                                true,
2221                                true,
2222                                true,
2223                                s->notify_access != NOTIFY_NONE,
2224                                &pid)) < 0)
2225                 goto fail;
2226
2227         service_set_main_pid(s, pid);
2228
2229         return;
2230
2231 fail:
2232         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
2233         service_enter_stop(s, false);
2234 }
2235
2236 static int service_start(Unit *u) {
2237         Service *s = SERVICE(u);
2238
2239         assert(s);
2240
2241         /* We cannot fulfill this request right now, try again later
2242          * please! */
2243         if (s->state == SERVICE_STOP ||
2244             s->state == SERVICE_STOP_SIGTERM ||
2245             s->state == SERVICE_STOP_SIGKILL ||
2246             s->state == SERVICE_STOP_POST ||
2247             s->state == SERVICE_FINAL_SIGTERM ||
2248             s->state == SERVICE_FINAL_SIGKILL)
2249                 return -EAGAIN;
2250
2251         /* Already on it! */
2252         if (s->state == SERVICE_START_PRE ||
2253             s->state == SERVICE_START ||
2254             s->state == SERVICE_START_POST)
2255                 return 0;
2256
2257         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2258
2259         /* Make sure we don't enter a busy loop of some kind. */
2260         if (!ratelimit_test(&s->ratelimit)) {
2261                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
2262                 return -ECANCELED;
2263         }
2264
2265         s->failure = false;
2266         s->main_pid_known = false;
2267         s->forbid_restart = false;
2268
2269         service_enter_start_pre(s);
2270         return 0;
2271 }
2272
2273 static int service_stop(Unit *u) {
2274         Service *s = SERVICE(u);
2275
2276         assert(s);
2277
2278         /* This is a user request, so don't do restarts on this
2279          * shutdown. */
2280         s->forbid_restart = true;
2281
2282         /* Already on it */
2283         if (s->state == SERVICE_STOP ||
2284             s->state == SERVICE_STOP_SIGTERM ||
2285             s->state == SERVICE_STOP_SIGKILL ||
2286             s->state == SERVICE_STOP_POST ||
2287             s->state == SERVICE_FINAL_SIGTERM ||
2288             s->state == SERVICE_FINAL_SIGKILL)
2289                 return 0;
2290
2291         /* Don't allow a restart */
2292         if (s->state == SERVICE_AUTO_RESTART) {
2293                 service_set_state(s, SERVICE_DEAD);
2294                 return 0;
2295         }
2296
2297         /* If there's already something running we go directly into
2298          * kill mode. */
2299         if (s->state == SERVICE_START_PRE ||
2300             s->state == SERVICE_START ||
2301             s->state == SERVICE_START_POST ||
2302             s->state == SERVICE_RELOAD) {
2303                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2304                 return 0;
2305         }
2306
2307         assert(s->state == SERVICE_RUNNING ||
2308                s->state == SERVICE_EXITED);
2309
2310         service_enter_stop(s, true);
2311         return 0;
2312 }
2313
2314 static int service_reload(Unit *u) {
2315         Service *s = SERVICE(u);
2316
2317         assert(s);
2318
2319         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2320
2321         service_enter_reload(s);
2322         return 0;
2323 }
2324
2325 static bool service_can_reload(Unit *u) {
2326         Service *s = SERVICE(u);
2327
2328         assert(s);
2329
2330         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2331 }
2332
2333 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2334         Service *s = SERVICE(u);
2335
2336         assert(u);
2337         assert(f);
2338         assert(fds);
2339
2340         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2341         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2342
2343         if (s->control_pid > 0)
2344                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2345
2346         if (s->main_pid_known && s->main_pid > 0)
2347                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2348
2349         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2350
2351         if (s->status_text)
2352                 unit_serialize_item(u, f, "status-text", s->status_text);
2353
2354         /* There's a minor uncleanliness here: if there are multiple
2355          * commands attached here, we will start from the first one
2356          * again */
2357         if (s->control_command_id >= 0)
2358                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2359
2360         if (s->socket_fd >= 0) {
2361                 int copy;
2362
2363                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2364                         return copy;
2365
2366                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2367         }
2368
2369         if (s->main_exec_status.pid > 0) {
2370                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2371                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2372                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2373
2374                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2375                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2376                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2377                 }
2378         }
2379
2380         return 0;
2381 }
2382
2383 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2384         Service *s = SERVICE(u);
2385
2386         assert(u);
2387         assert(key);
2388         assert(value);
2389         assert(fds);
2390
2391         if (streq(key, "state")) {
2392                 ServiceState state;
2393
2394                 if ((state = service_state_from_string(value)) < 0)
2395                         log_debug("Failed to parse state value %s", value);
2396                 else
2397                         s->deserialized_state = state;
2398         } else if (streq(key, "failure")) {
2399                 int b;
2400
2401                 if ((b = parse_boolean(value)) < 0)
2402                         log_debug("Failed to parse failure value %s", value);
2403                 else
2404                         s->failure = b || s->failure;
2405         } else if (streq(key, "control-pid")) {
2406                 pid_t pid;
2407
2408                 if (parse_pid(value, &pid) < 0)
2409                         log_debug("Failed to parse control-pid value %s", value);
2410                 else
2411                         s->control_pid = pid;
2412         } else if (streq(key, "main-pid")) {
2413                 pid_t pid;
2414
2415                 if (parse_pid(value, &pid) < 0)
2416                         log_debug("Failed to parse main-pid value %s", value);
2417                 else
2418                         service_set_main_pid(s, (pid_t) pid);
2419         } else if (streq(key, "main-pid-known")) {
2420                 int b;
2421
2422                 if ((b = parse_boolean(value)) < 0)
2423                         log_debug("Failed to parse main-pid-known value %s", value);
2424                 else
2425                         s->main_pid_known = b;
2426         } else if (streq(key, "status-text")) {
2427                 char *t;
2428
2429                 if ((t = strdup(value))) {
2430                         free(s->status_text);
2431                         s->status_text = t;
2432                 }
2433
2434         } else if (streq(key, "control-command")) {
2435                 ServiceExecCommand id;
2436
2437                 if ((id = service_exec_command_from_string(value)) < 0)
2438                         log_debug("Failed to parse exec-command value %s", value);
2439                 else {
2440                         s->control_command_id = id;
2441                         s->control_command = s->exec_command[id];
2442                 }
2443         } else if (streq(key, "socket-fd")) {
2444                 int fd;
2445
2446                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2447                         log_debug("Failed to parse socket-fd value %s", value);
2448                 else {
2449
2450                         if (s->socket_fd >= 0)
2451                                 close_nointr_nofail(s->socket_fd);
2452                         s->socket_fd = fdset_remove(fds, fd);
2453                 }
2454         } else if (streq(key, "main-exec-status-pid")) {
2455                 pid_t pid;
2456
2457                 if (parse_pid(value, &pid) < 0)
2458                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2459                 else
2460                         s->main_exec_status.pid = pid;
2461         } else if (streq(key, "main-exec-status-code")) {
2462                 int i;
2463
2464                 if (safe_atoi(value, &i) < 0)
2465                         log_debug("Failed to parse main-exec-status-code value %s", value);
2466                 else
2467                         s->main_exec_status.code = i;
2468         } else if (streq(key, "main-exec-status-status")) {
2469                 int i;
2470
2471                 if (safe_atoi(value, &i) < 0)
2472                         log_debug("Failed to parse main-exec-status-status value %s", value);
2473                 else
2474                         s->main_exec_status.status = i;
2475         } else if (streq(key, "main-exec-status-start"))
2476                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2477         else if (streq(key, "main-exec-status-exit"))
2478                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2479         else
2480                 log_debug("Unknown serialization key '%s'", key);
2481
2482         return 0;
2483 }
2484
2485 static UnitActiveState service_active_state(Unit *u) {
2486         assert(u);
2487
2488         return state_translation_table[SERVICE(u)->state];
2489 }
2490
2491 static const char *service_sub_state_to_string(Unit *u) {
2492         assert(u);
2493
2494         return service_state_to_string(SERVICE(u)->state);
2495 }
2496
2497 static bool service_check_gc(Unit *u) {
2498         Service *s = SERVICE(u);
2499
2500         assert(s);
2501
2502         /* Never clean up services that still have a process around,
2503          * even if the service is formally dead. */
2504         if (cgroup_good(s) > 0 ||
2505             main_pid_good(s) > 0 ||
2506             control_pid_good(s) > 0)
2507                 return true;
2508
2509 #ifdef HAVE_SYSV_COMPAT
2510         if (s->sysv_path)
2511                 return true;
2512 #endif
2513
2514         return false;
2515 }
2516
2517 static bool service_check_snapshot(Unit *u) {
2518         Service *s = SERVICE(u);
2519
2520         assert(s);
2521
2522         return !s->got_socket_fd;
2523 }
2524
2525 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2526         Service *s = SERVICE(u);
2527         bool success;
2528
2529         assert(s);
2530         assert(pid >= 0);
2531
2532         if (!s->meta.fragment_path)
2533                 success = is_clean_exit_lsb(code, status);
2534         else
2535                 success = is_clean_exit(code, status);
2536
2537         if (s->main_pid == pid) {
2538
2539                 s->main_pid = 0;
2540                 exec_status_exit(&s->main_exec_status, pid, code, status, s->exec_context.utmp_id);
2541
2542                 /* If this is not a forking service than the main
2543                  * process got started and hence we copy the exit
2544                  * status so that it is recorded both as main and as
2545                  * control process exit status */
2546                 if (s->main_command) {
2547                         s->main_command->exec_status = s->main_exec_status;
2548
2549                         if (s->main_command->ignore)
2550                                 success = true;
2551                 }
2552
2553                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2554                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2555                 s->failure = s->failure || !success;
2556
2557                 if (s->main_command &&
2558                     s->main_command->command_next &&
2559                     success) {
2560
2561                         /* There is another command to *
2562                          * execute, so let's do that. */
2563
2564                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2565                         service_run_next_main(s, success);
2566
2567                 } else {
2568
2569                         /* The service exited, so the service is officially
2570                          * gone. */
2571                         s->main_command = NULL;
2572
2573                         switch (s->state) {
2574
2575                         case SERVICE_START_POST:
2576                         case SERVICE_RELOAD:
2577                         case SERVICE_STOP:
2578                                 /* Need to wait until the operation is
2579                                  * done */
2580                                 break;
2581
2582                         case SERVICE_START:
2583                                 if (s->type == SERVICE_ONESHOT) {
2584                                         /* This was our main goal, so let's go on */
2585                                         if (success)
2586                                                 service_enter_start_post(s);
2587                                         else
2588                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2589                                         break;
2590                                 } else {
2591                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2592
2593                                         /* Fall through */
2594                                 }
2595
2596                         case SERVICE_RUNNING:
2597                                 service_enter_running(s, success);
2598                                 break;
2599
2600                         case SERVICE_STOP_SIGTERM:
2601                         case SERVICE_STOP_SIGKILL:
2602
2603                                 if (!control_pid_good(s))
2604                                         service_enter_stop_post(s, success);
2605
2606                                 /* If there is still a control process, wait for that first */
2607                                 break;
2608
2609                         default:
2610                                 assert_not_reached("Uh, main process died at wrong time.");
2611                         }
2612                 }
2613
2614         } else if (s->control_pid == pid) {
2615
2616                 s->control_pid = 0;
2617
2618                 if (s->control_command) {
2619                         exec_status_exit(&s->control_command->exec_status, pid, code, status, s->exec_context.utmp_id);
2620
2621                         if (s->control_command->ignore)
2622                                 success = true;
2623                 }
2624
2625                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2626                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2627                 s->failure = s->failure || !success;
2628
2629                 if (s->control_command &&
2630                     s->control_command->command_next &&
2631                     success) {
2632
2633                         /* There is another command to *
2634                          * execute, so let's do that. */
2635
2636                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2637                         service_run_next_control(s, success);
2638
2639                 } else {
2640                         /* No further commands for this step, so let's
2641                          * figure out what to do next */
2642
2643                         s->control_command = NULL;
2644                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2645
2646                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2647
2648                         switch (s->state) {
2649
2650                         case SERVICE_START_PRE:
2651                                 if (success)
2652                                         service_enter_start(s);
2653                                 else
2654                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2655                                 break;
2656
2657                         case SERVICE_START:
2658                                 assert(s->type == SERVICE_FORKING);
2659
2660                                 /* Let's try to load the pid
2661                                  * file here if we can. We
2662                                  * ignore the return value,
2663                                  * since the PID file might
2664                                  * actually be created by a
2665                                  * START_POST script */
2666
2667                                 if (success) {
2668                                         service_load_pid_file(s);
2669                                         service_search_main_pid(s);
2670
2671                                         service_enter_start_post(s);
2672                                 } else
2673                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2674
2675                                 break;
2676
2677                         case SERVICE_START_POST:
2678                                 if (success && s->pid_file && !s->main_pid_known) {
2679                                         int r;
2680
2681                                         /* Hmm, let's see if we can
2682                                          * load the pid now after the
2683                                          * start-post scripts got
2684                                          * executed. */
2685
2686                                         if ((r = service_load_pid_file(s)) < 0)
2687                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2688                                 }
2689
2690                                 s->reload_failure = !success;
2691                                 service_enter_running(s, true);
2692                                 break;
2693
2694                         case SERVICE_RELOAD:
2695                                 if (success) {
2696                                         service_load_pid_file(s);
2697                                         service_search_main_pid(s);
2698                                 }
2699
2700                                 s->reload_failure = !success;
2701                                 service_enter_running(s, true);
2702                                 break;
2703
2704                         case SERVICE_STOP:
2705                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2706                                 break;
2707
2708                         case SERVICE_STOP_SIGTERM:
2709                         case SERVICE_STOP_SIGKILL:
2710                                 if (main_pid_good(s) <= 0)
2711                                         service_enter_stop_post(s, success);
2712
2713                                 /* If there is still a service
2714                                  * process around, wait until
2715                                  * that one quit, too */
2716                                 break;
2717
2718                         case SERVICE_STOP_POST:
2719                         case SERVICE_FINAL_SIGTERM:
2720                         case SERVICE_FINAL_SIGKILL:
2721                                 service_enter_dead(s, success, true);
2722                                 break;
2723
2724                         default:
2725                                 assert_not_reached("Uh, control process died at wrong time.");
2726                         }
2727                 }
2728         }
2729
2730         /* Notify clients about changed exit status */
2731         unit_add_to_dbus_queue(u);
2732 }
2733
2734 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2735         Service *s = SERVICE(u);
2736
2737         assert(s);
2738         assert(elapsed == 1);
2739
2740         assert(w == &s->timer_watch);
2741
2742         switch (s->state) {
2743
2744         case SERVICE_START_PRE:
2745         case SERVICE_START:
2746                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2747                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2748                 break;
2749
2750         case SERVICE_START_POST:
2751                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2752                 service_enter_stop(s, false);
2753                 break;
2754
2755         case SERVICE_RELOAD:
2756                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2757                 s->reload_failure = true;
2758                 service_enter_running(s, true);
2759                 break;
2760
2761         case SERVICE_STOP:
2762                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2763                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2764                 break;
2765
2766         case SERVICE_STOP_SIGTERM:
2767                 if (s->exec_context.send_sigkill) {
2768                         log_warning("%s stopping timed out. Killing.", u->meta.id);
2769                         service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2770                 } else {
2771                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->meta.id);
2772                         service_enter_stop_post(s, false);
2773                 }
2774
2775                 break;
2776
2777         case SERVICE_STOP_SIGKILL:
2778                 /* Uh, we sent a SIGKILL and it is still not gone?
2779                  * Must be something we cannot kill, so let's just be
2780                  * weirded out and continue */
2781
2782                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2783                 service_enter_stop_post(s, false);
2784                 break;
2785
2786         case SERVICE_STOP_POST:
2787                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2788                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2789                 break;
2790
2791         case SERVICE_FINAL_SIGTERM:
2792                 if (s->exec_context.send_sigkill) {
2793                         log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2794                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2795                 } else {
2796                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->meta.id);
2797                         service_enter_dead(s, false, true);
2798                 }
2799
2800                 break;
2801
2802         case SERVICE_FINAL_SIGKILL:
2803                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2804                 service_enter_dead(s, false, true);
2805                 break;
2806
2807         case SERVICE_AUTO_RESTART:
2808                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2809                 service_enter_restart(s);
2810                 break;
2811
2812         default:
2813                 assert_not_reached("Timeout at wrong time.");
2814         }
2815 }
2816
2817 static void service_cgroup_notify_event(Unit *u) {
2818         Service *s = SERVICE(u);
2819
2820         assert(u);
2821
2822         log_debug("%s: cgroup is empty", u->meta.id);
2823
2824         switch (s->state) {
2825
2826                 /* Waiting for SIGCHLD is usually more interesting,
2827                  * because it includes return codes/signals. Which is
2828                  * why we ignore the cgroup events for most cases,
2829                  * except when we don't know pid which to expect the
2830                  * SIGCHLD for. */
2831
2832         case SERVICE_RUNNING:
2833                 service_enter_running(s, true);
2834                 break;
2835
2836         case SERVICE_STOP_SIGTERM:
2837         case SERVICE_STOP_SIGKILL:
2838                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2839                         service_enter_stop_post(s, true);
2840
2841                 break;
2842
2843         case SERVICE_FINAL_SIGTERM:
2844         case SERVICE_FINAL_SIGKILL:
2845                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2846                         service_enter_dead(s, true, true);
2847
2848                 break;
2849
2850         default:
2851                 ;
2852         }
2853 }
2854
2855 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2856         Service *s = SERVICE(u);
2857         const char *e;
2858
2859         assert(u);
2860
2861         if (s->notify_access == NOTIFY_NONE) {
2862                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2863                             u->meta.id, (unsigned long) pid);
2864                 return;
2865         }
2866
2867         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2868                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2869                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2870                 return;
2871         }
2872
2873         log_debug("%s: Got message", u->meta.id);
2874
2875         /* Interpret MAINPID= */
2876         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2877             (s->state == SERVICE_START ||
2878              s->state == SERVICE_START_POST ||
2879              s->state == SERVICE_RUNNING ||
2880              s->state == SERVICE_RELOAD)) {
2881
2882                 if (parse_pid(e + 8, &pid) < 0)
2883                         log_warning("Failed to parse notification message %s", e);
2884                 else {
2885                         log_debug("%s: got %s", u->meta.id, e);
2886                         service_set_main_pid(s, pid);
2887                 }
2888         }
2889
2890         /* Interpret READY= */
2891         if (s->type == SERVICE_NOTIFY &&
2892             s->state == SERVICE_START &&
2893             strv_find(tags, "READY=1")) {
2894                 log_debug("%s: got READY=1", u->meta.id);
2895
2896                 service_enter_start_post(s);
2897         }
2898
2899         /* Interpret STATUS= */
2900         if ((e = strv_find_prefix(tags, "STATUS="))) {
2901                 char *t;
2902
2903                 if (e[7]) {
2904                         if (!(t = strdup(e+7))) {
2905                                 log_error("Failed to allocate string.");
2906                                 return;
2907                         }
2908
2909                         log_debug("%s: got %s", u->meta.id, e);
2910
2911                         free(s->status_text);
2912                         s->status_text = t;
2913                 } else {
2914                         free(s->status_text);
2915                         s->status_text = NULL;
2916                 }
2917
2918         }
2919
2920         /* Notify clients about changed status or main pid */
2921         unit_add_to_dbus_queue(u);
2922 }
2923
2924 #ifdef HAVE_SYSV_COMPAT
2925 static int service_enumerate(Manager *m) {
2926         char **p;
2927         unsigned i;
2928         DIR *d = NULL;
2929         char *path = NULL, *fpath = NULL, *name = NULL;
2930         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2931         Unit *service;
2932         Iterator j;
2933         int r;
2934
2935         assert(m);
2936
2937         zero(runlevel_services);
2938
2939         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2940                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2941                         struct dirent *de;
2942
2943                         free(path);
2944                         path = NULL;
2945                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2946                                 r = -ENOMEM;
2947                                 goto finish;
2948                         }
2949
2950                         if (d)
2951                                 closedir(d);
2952
2953                         if (!(d = opendir(path))) {
2954                                 if (errno != ENOENT)
2955                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2956
2957                                 continue;
2958                         }
2959
2960                         while ((de = readdir(d))) {
2961                                 int a, b;
2962
2963                                 if (ignore_file(de->d_name))
2964                                         continue;
2965
2966                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2967                                         continue;
2968
2969                                 if (strlen(de->d_name) < 4)
2970                                         continue;
2971
2972                                 a = undecchar(de->d_name[1]);
2973                                 b = undecchar(de->d_name[2]);
2974
2975                                 if (a < 0 || b < 0)
2976                                         continue;
2977
2978                                 free(fpath);
2979                                 fpath = NULL;
2980                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2981                                         r = -ENOMEM;
2982                                         goto finish;
2983                                 }
2984
2985                                 if (access(fpath, X_OK) < 0) {
2986
2987                                         if (errno != ENOENT)
2988                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2989
2990                                         continue;
2991                                 }
2992
2993                                 free(name);
2994                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2995                                         r = -ENOMEM;
2996                                         goto finish;
2997                                 }
2998
2999                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
3000                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3001                                         continue;
3002                                 }
3003
3004                                 if (de->d_name[0] == 'S')  {
3005
3006                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
3007                                                 SERVICE(service)->sysv_start_priority =
3008                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
3009
3010                                                 SERVICE(service)->sysv_enabled = true;
3011                                         }
3012
3013                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3014                                                 goto finish;
3015
3016                                         if ((r = set_put(runlevel_services[i], service)) < 0)
3017                                                 goto finish;
3018
3019                                 } else if (de->d_name[0] == 'K' &&
3020                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
3021                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3022
3023                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3024                                                 goto finish;
3025
3026                                         if ((r = set_put(shutdown_services, service)) < 0)
3027                                                 goto finish;
3028                                 }
3029                         }
3030                 }
3031
3032         /* Now we loaded all stubs and are aware of the lowest
3033         start-up priority for all services, not let's actually load
3034         the services, this will also tell us which services are
3035         actually native now */
3036         manager_dispatch_load_queue(m);
3037
3038         /* If this is a native service, rely on native ways to pull in
3039          * a service, don't pull it in via sysv rcN.d links. */
3040         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3041                 SET_FOREACH(service, runlevel_services[i], j) {
3042                         service = unit_follow_merge(service);
3043
3044                         if (service->meta.fragment_path)
3045                                 continue;
3046
3047                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3048                                 goto finish;
3049                 }
3050
3051         /* We honour K links only for halt/reboot. For the normal
3052          * runlevels we assume the stop jobs will be implicitly added
3053          * by the core logic. Also, we don't really distinguish here
3054          * between the runlevels 0 and 6 and just add them to the
3055          * special shutdown target. On SUSE the boot.d/ runlevel is
3056          * also used for shutdown, so we add links for that too to the
3057          * shutdown target.*/
3058         SET_FOREACH(service, shutdown_services, j) {
3059                 service = unit_follow_merge(service);
3060
3061                 if (service->meta.fragment_path)
3062                         continue;
3063
3064                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3065                         goto finish;
3066         }
3067
3068         r = 0;
3069
3070 finish:
3071         free(path);
3072         free(fpath);
3073         free(name);
3074
3075         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3076                 set_free(runlevel_services[i]);
3077         set_free(shutdown_services);
3078
3079         if (d)
3080                 closedir(d);
3081
3082         return r;
3083 }
3084 #endif
3085
3086 static void service_bus_name_owner_change(
3087                 Unit *u,
3088                 const char *name,
3089                 const char *old_owner,
3090                 const char *new_owner) {
3091
3092         Service *s = SERVICE(u);
3093
3094         assert(s);
3095         assert(name);
3096
3097         assert(streq(s->bus_name, name));
3098         assert(old_owner || new_owner);
3099
3100         if (old_owner && new_owner)
3101                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
3102         else if (old_owner)
3103                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
3104         else
3105                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
3106
3107         s->bus_name_good = !!new_owner;
3108
3109         if (s->type == SERVICE_DBUS) {
3110
3111                 /* service_enter_running() will figure out what to
3112                  * do */
3113                 if (s->state == SERVICE_RUNNING)
3114                         service_enter_running(s, true);
3115                 else if (s->state == SERVICE_START && new_owner)
3116                         service_enter_start_post(s);
3117
3118         } else if (new_owner &&
3119                    s->main_pid <= 0 &&
3120                    (s->state == SERVICE_START ||
3121                     s->state == SERVICE_START_POST ||
3122                     s->state == SERVICE_RUNNING ||
3123                     s->state == SERVICE_RELOAD)) {
3124
3125                 /* Try to acquire PID from bus service */
3126                 log_debug("Trying to acquire PID from D-Bus name...");
3127
3128                 bus_query_pid(u->meta.manager, name);
3129         }
3130 }
3131
3132 static void service_bus_query_pid_done(
3133                 Unit *u,
3134                 const char *name,
3135                 pid_t pid) {
3136
3137         Service *s = SERVICE(u);
3138
3139         assert(s);
3140         assert(name);
3141
3142         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
3143
3144         if (s->main_pid <= 0 &&
3145             (s->state == SERVICE_START ||
3146              s->state == SERVICE_START_POST ||
3147              s->state == SERVICE_RUNNING ||
3148              s->state == SERVICE_RELOAD))
3149                 service_set_main_pid(s, pid);
3150 }
3151
3152 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3153         assert(s);
3154         assert(fd >= 0);
3155
3156         /* This is called by the socket code when instantiating a new
3157          * service for a stream socket and the socket needs to be
3158          * configured. */
3159
3160         if (s->meta.load_state != UNIT_LOADED)
3161                 return -EINVAL;
3162
3163         if (s->socket_fd >= 0)
3164                 return -EBUSY;
3165
3166         if (s->state != SERVICE_DEAD)
3167                 return -EAGAIN;
3168
3169         s->socket_fd = fd;
3170         s->got_socket_fd = true;
3171         s->accept_socket = sock;
3172
3173         return 0;
3174 }
3175
3176 static void service_reset_failed(Unit *u) {
3177         Service *s = SERVICE(u);
3178
3179         assert(s);
3180
3181         if (s->state == SERVICE_FAILED)
3182                 service_set_state(s, SERVICE_DEAD);
3183
3184         s->failure = false;
3185 }
3186
3187 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3188         Service *s = SERVICE(u);
3189         int r = 0;
3190         Set *pid_set = NULL;
3191
3192         assert(s);
3193
3194         if (s->main_pid <= 0 && who == KILL_MAIN) {
3195                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3196                 return -EINVAL;
3197         }
3198
3199         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3200                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3201                 return -ENOENT;
3202         }
3203
3204         if (s->control_pid > 0)
3205                 if (kill(mode == KILL_PROCESS_GROUP ? -s->control_pid : s->control_pid, signo) < 0)
3206                         r = -errno;
3207
3208         if (s->main_pid > 0)
3209                 if (kill(mode == KILL_PROCESS_GROUP ? -s->main_pid : s->main_pid, signo) < 0)
3210                         r = -errno;
3211
3212         if (mode == KILL_CONTROL_GROUP) {
3213                 int q;
3214
3215                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3216                         return -ENOMEM;
3217
3218                 /* Exclude the control/main pid from being killed via the cgroup */
3219                 if (s->control_pid > 0)
3220                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3221                                 r = q;
3222                                 goto finish;
3223                         }
3224
3225                 if (s->main_pid > 0)
3226                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3227                                 r = q;
3228                                 goto finish;
3229                         }
3230
3231                 if ((q = cgroup_bonding_kill_list(s->meta.cgroup_bondings, signo, false, pid_set)) < 0)
3232                         if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
3233                                 r = q;
3234         }
3235
3236 finish:
3237         if (pid_set)
3238                 set_free(pid_set);
3239
3240         return r;
3241 }
3242
3243 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3244         [SERVICE_DEAD] = "dead",
3245         [SERVICE_START_PRE] = "start-pre",
3246         [SERVICE_START] = "start",
3247         [SERVICE_START_POST] = "start-post",
3248         [SERVICE_RUNNING] = "running",
3249         [SERVICE_EXITED] = "exited",
3250         [SERVICE_RELOAD] = "reload",
3251         [SERVICE_STOP] = "stop",
3252         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3253         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3254         [SERVICE_STOP_POST] = "stop-post",
3255         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3256         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3257         [SERVICE_FAILED] = "failed",
3258         [SERVICE_AUTO_RESTART] = "auto-restart",
3259 };
3260
3261 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3262
3263 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3264         [SERVICE_RESTART_NO] = "no",
3265         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3266         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3267         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3268         [SERVICE_RESTART_ALWAYS] = "always"
3269 };
3270
3271 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3272
3273 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3274         [SERVICE_SIMPLE] = "simple",
3275         [SERVICE_FORKING] = "forking",
3276         [SERVICE_ONESHOT] = "oneshot",
3277         [SERVICE_DBUS] = "dbus",
3278         [SERVICE_NOTIFY] = "notify"
3279 };
3280
3281 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3282
3283 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3284         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3285         [SERVICE_EXEC_START] = "ExecStart",
3286         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3287         [SERVICE_EXEC_RELOAD] = "ExecReload",
3288         [SERVICE_EXEC_STOP] = "ExecStop",
3289         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3290 };
3291
3292 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3293
3294 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3295         [NOTIFY_NONE] = "none",
3296         [NOTIFY_MAIN] = "main",
3297         [NOTIFY_ALL] = "all"
3298 };
3299
3300 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3301
3302 const UnitVTable service_vtable = {
3303         .suffix = ".service",
3304         .show_status = true,
3305
3306         .init = service_init,
3307         .done = service_done,
3308         .load = service_load,
3309
3310         .coldplug = service_coldplug,
3311
3312         .dump = service_dump,
3313
3314         .start = service_start,
3315         .stop = service_stop,
3316         .reload = service_reload,
3317
3318         .can_reload = service_can_reload,
3319
3320         .kill = service_kill,
3321
3322         .serialize = service_serialize,
3323         .deserialize_item = service_deserialize_item,
3324
3325         .active_state = service_active_state,
3326         .sub_state_to_string = service_sub_state_to_string,
3327
3328         .check_gc = service_check_gc,
3329         .check_snapshot = service_check_snapshot,
3330
3331         .sigchld_event = service_sigchld_event,
3332         .timer_event = service_timer_event,
3333
3334         .reset_failed = service_reset_failed,
3335
3336         .cgroup_notify_empty = service_cgroup_notify_event,
3337         .notify_message = service_notify_message,
3338
3339         .bus_name_owner_change = service_bus_name_owner_change,
3340         .bus_query_pid_done = service_bus_query_pid_done,
3341
3342         .bus_interface = "org.freedesktop.systemd1.Service",
3343         .bus_message_handler = bus_service_message_handler,
3344         .bus_invalidating_properties =  bus_service_invalidating_properties,
3345
3346 #ifdef HAVE_SYSV_COMPAT
3347         .enumerate = service_enumerate
3348 #endif
3349 };