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