src/main.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 <dbus/dbus.h>
  23
  24 #include <stdio.h>
  25 #include <errno.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <getopt.h>
  31 #include <signal.h>
  32 #include <sys/wait.h>
  33 #include <fcntl.h>
  34 #include <sys/prctl.h>
  35
  36 #include "manager.h"
  37 #include "log.h"
  38 #include "mount-setup.h"
  39 #include "hostname-setup.h"
  40 #include "loopback-setup.h"
  41 #include "kmod-setup.h"
  42 #include "locale-setup.h"
  43 #include "selinux-setup.h"
  44 #include "machine-id-setup.h"
  45 #include "load-fragment.h"
  46 #include "fdset.h"
  47 #include "special.h"
  48 #include "conf-parser.h"
  49 #include "bus-errors.h"
  50 #include "missing.h"
  51 #include "label.h"
  52 #include "build.h"
  53 #include "strv.h"
  54
  55 static enum {
  56         ACTION_RUN,
  57         ACTION_HELP,
  58         ACTION_TEST,
  59         ACTION_DUMP_CONFIGURATION_ITEMS,
  60         ACTION_DONE
  61 } arg_action = ACTION_RUN;
  62
  63 static char *arg_default_unit = NULL;
  64 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
  65
  66 static bool arg_dump_core = true;
  67 static bool arg_crash_shell = false;
  68 static int arg_crash_chvt = -1;
  69 static bool arg_confirm_spawn = false;
  70 static bool arg_show_status = true;
  71 #ifdef HAVE_SYSV_COMPAT
  72 static bool arg_sysv_console = true;
  73 #endif
  74 static bool arg_mount_auto = true;
  75 static bool arg_swap_auto = true;
  76 static char **arg_default_controllers = NULL;
  77 static ExecOutput arg_default_std_output = EXEC_OUTPUT_INHERIT;
  78 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
  79
  80 static FILE* serialization = NULL;
  81
  82 static void nop_handler(int sig) {
  83 }
  84
  85 _noreturn_ static void crash(int sig) {
  86
  87         if (!arg_dump_core)
  88                 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
  89         else {
  90                 struct sigaction sa;
  91                 pid_t pid;
  92
  93                 /* We want to wait for the core process, hence let's enable SIGCHLD */
  94                 zero(sa);
  95                 sa.sa_handler = nop_handler;
  96                 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
  97                 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
  98
  99                 if ((pid = fork()) < 0)
 100                         log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
 101
 102                 else if (pid == 0) {
 103                         struct rlimit rl;
 104
 105                         /* Enable default signal handler for core dump */
 106                         zero(sa);
 107                         sa.sa_handler = SIG_DFL;
 108                         assert_se(sigaction(sig, &sa, NULL) == 0);
 109
 110                         /* Don't limit the core dump size */
 111                         zero(rl);
 112                         rl.rlim_cur = RLIM_INFINITY;
 113                         rl.rlim_max = RLIM_INFINITY;
 114                         setrlimit(RLIMIT_CORE, &rl);
 115
 116                         /* Just to be sure... */
 117                         assert_se(chdir("/") == 0);
 118
 119                         /* Raise the signal again */
 120                         raise(sig);
 121
 122                         assert_not_reached("We shouldn't be here...");
 123                         _exit(1);
 124
 125                 } else {
 126                         siginfo_t status;
 127                         int r;
 128
 129                         /* Order things nicely. */
 130                         if ((r = wait_for_terminate(pid, &status)) < 0)
 131                                 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
 132                         else if (status.si_code != CLD_DUMPED)
 133                                 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
 134                         else
 135                                 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
 136                 }
 137         }
 138
 139         if (arg_crash_chvt)
 140                 chvt(arg_crash_chvt);
 141
 142         if (arg_crash_shell) {
 143                 struct sigaction sa;
 144                 pid_t pid;
 145
 146                 log_info("Executing crash shell in 10s...");
 147                 sleep(10);
 148
 149                 /* Let the kernel reap children for us */
 150                 zero(sa);
 151                 sa.sa_handler = SIG_IGN;
 152                 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
 153                 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
 154
 155                 if ((pid = fork()) < 0)
 156                         log_error("Failed to fork off crash shell: %s", strerror(errno));
 157                 else if (pid == 0) {
 158                         int fd, r;
 159
 160                         if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
 161                                 log_error("Failed to acquire terminal: %s", strerror(-fd));
 162                         else if ((r = make_stdio(fd)) < 0)
 163                                 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
 164
 165                         execl("/bin/sh", "/bin/sh", NULL);
 166
 167                         log_error("execl() failed: %s", strerror(errno));
 168                         _exit(1);
 169                 }
 170
 171                 log_info("Successfully spawned crash shall as pid %lu.", (unsigned long) pid);
 172         }
 173
 174         log_info("Freezing execution.");
 175         freeze();
 176 }
 177
 178 static void install_crash_handler(void) {
 179         struct sigaction sa;
 180
 181         zero(sa);
 182
 183         sa.sa_handler = crash;
 184         sa.sa_flags = SA_NODEFER;
 185
 186         sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
 187 }
 188
 189 static int console_setup(bool do_reset) {
 190         int tty_fd, r;
 191
 192         /* If we are init, we connect stdin/stdout/stderr to /dev/null
 193          * and make sure we don't have a controlling tty. */
 194
 195         release_terminal();
 196
 197         if (!do_reset)
 198                 return 0;
 199
 200         if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
 201                 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
 202                 return -tty_fd;
 203         }
 204
 205         if ((r = reset_terminal(tty_fd)) < 0)
 206                 log_error("Failed to reset /dev/console: %s", strerror(-r));
 207
 208         close_nointr_nofail(tty_fd);
 209         return r;
 210 }
 211
 212 static int set_default_unit(const char *u) {
 213         char *c;
 214
 215         assert(u);
 216
 217         if (!(c = strdup(u)))
 218                 return -ENOMEM;
 219
 220         free(arg_default_unit);
 221         arg_default_unit = c;
 222         return 0;
 223 }
 224
 225 static int parse_proc_cmdline_word(const char *word) {
 226
 227         static const char * const rlmap[] = {
 228                 "emergency", SPECIAL_EMERGENCY_TARGET,
 229                 "-b",        SPECIAL_EMERGENCY_TARGET,
 230                 "b",         SPECIAL_EMERGENCY_TARGET,
 231                 "single",    SPECIAL_RESCUE_TARGET,
 232                 "-s",        SPECIAL_RESCUE_TARGET,
 233                 "s",         SPECIAL_RESCUE_TARGET,
 234                 "S",         SPECIAL_RESCUE_TARGET,
 235                 "1",         SPECIAL_RESCUE_TARGET,
 236                 "2",         SPECIAL_RUNLEVEL2_TARGET,
 237                 "3",         SPECIAL_RUNLEVEL3_TARGET,
 238                 "4",         SPECIAL_RUNLEVEL4_TARGET,
 239                 "5",         SPECIAL_RUNLEVEL5_TARGET,
 240         };
 241
 242         assert(word);
 243
 244         if (startswith(word, "systemd.unit="))
 245                 return set_default_unit(word + 13);
 246
 247         else if (startswith(word, "systemd.log_target=")) {
 248
 249                 if (log_set_target_from_string(word + 19) < 0)
 250                         log_warning("Failed to parse log target %s. Ignoring.", word + 19);
 251
 252         } else if (startswith(word, "systemd.log_level=")) {
 253
 254                 if (log_set_max_level_from_string(word + 18) < 0)
 255                         log_warning("Failed to parse log level %s. Ignoring.", word + 18);
 256
 257         } else if (startswith(word, "systemd.log_color=")) {
 258
 259                 if (log_show_color_from_string(word + 18) < 0)
 260                         log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
 261
 262         } else if (startswith(word, "systemd.log_location=")) {
 263
 264                 if (log_show_location_from_string(word + 21) < 0)
 265                         log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
 266
 267         } else if (startswith(word, "systemd.dump_core=")) {
 268                 int r;
 269
 270                 if ((r = parse_boolean(word + 18)) < 0)
 271                         log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
 272                 else
 273                         arg_dump_core = r;
 274
 275         } else if (startswith(word, "systemd.crash_shell=")) {
 276                 int r;
 277
 278                 if ((r = parse_boolean(word + 20)) < 0)
 279                         log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
 280                 else
 281                         arg_crash_shell = r;
 282
 283         } else if (startswith(word, "systemd.confirm_spawn=")) {
 284                 int r;
 285
 286                 if ((r = parse_boolean(word + 22)) < 0)
 287                         log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
 288                 else
 289                         arg_confirm_spawn = r;
 290
 291         } else if (startswith(word, "systemd.crash_chvt=")) {
 292                 int k;
 293
 294                 if (safe_atoi(word + 19, &k) < 0)
 295                         log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
 296                 else
 297                         arg_crash_chvt = k;
 298
 299         } else if (startswith(word, "systemd.show_status=")) {
 300                 int r;
 301
 302                 if ((r = parse_boolean(word + 20)) < 0)
 303                         log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
 304                 else
 305                         arg_show_status = r;
 306         } else if (startswith(word, "systemd.default_standard_output=")) {
 307                 int r;
 308
 309                 if ((r = exec_output_from_string(word + 32)) < 0)
 310                         log_warning("Failed to parse default standard output switch %s, Ignoring.", word + 32);
 311                 else
 312                         arg_default_std_output = r;
 313         } else if (startswith(word, "systemd.default_standard_error=")) {
 314                 int r;
 315
 316                 if ((r = exec_output_from_string(word + 31)) < 0)
 317                         log_warning("Failed to parse default standard error switch %s, Ignoring.", word + 31);
 318                 else
 319                         arg_default_std_error = r;
 320 #ifdef HAVE_SYSV_COMPAT
 321         } else if (startswith(word, "systemd.sysv_console=")) {
 322                 int r;
 323
 324                 if ((r = parse_boolean(word + 21)) < 0)
 325                         log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
 326                 else
 327                         arg_sysv_console = r;
 328 #endif
 329
 330         } else if (startswith(word, "systemd.")) {
 331
 332                 log_warning("Unknown kernel switch %s. Ignoring.", word);
 333
 334                 log_info("Supported kernel switches:\n"
 335                          "systemd.unit=UNIT                        Default unit to start\n"
 336                          "systemd.dump_core=0|1                    Dump core on crash\n"
 337                          "systemd.crash_shell=0|1                  Run shell on crash\n"
 338                          "systemd.crash_chvt=N                     Change to VT #N on crash\n"
 339                          "systemd.confirm_spawn=0|1                Confirm every process spawn\n"
 340                          "systemd.show_status=0|1                  Show status updates on the console during bootup\n"
 341 #ifdef HAVE_SYSV_COMPAT
 342                          "systemd.sysv_console=0|1                 Connect output of SysV scripts to console\n"
 343 #endif
 344                          "systemd.log_target=console|kmsg|syslog|syslog-or-kmsg|null\n"
 345                          "                                         Log target\n"
 346                          "systemd.log_level=LEVEL                  Log level\n"
 347                          "systemd.log_color=0|1                    Highlight important log messages\n"
 348                          "systemd.log_location=0|1                 Include code location in log messages\n"
 349                          "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
 350                          "                                         Set default log output for services\n"
 351                          "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
 352                          "                                         Set default log error output for services\n");
 353
 354         } else if (streq(word, "quiet")) {
 355                 arg_show_status = false;
 356 #ifdef HAVE_SYSV_COMPAT
 357                 arg_sysv_console = false;
 358 #endif
 359         } else {
 360                 unsigned i;
 361
 362                 /* SysV compatibility */
 363                 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
 364                         if (streq(word, rlmap[i]))
 365                                 return set_default_unit(rlmap[i+1]);
 366         }
 367
 368         return 0;
 369 }
 370
 371 static int config_parse_level(
 372                 const char *filename,
 373                 unsigned line,
 374                 const char *section,
 375                 const char *lvalue,
 376                 const char *rvalue,
 377                 void *data,
 378                 void *userdata) {
 379
 380         assert(filename);
 381         assert(lvalue);
 382         assert(rvalue);
 383
 384         log_set_max_level_from_string(rvalue);
 385         return 0;
 386 }
 387
 388 static int config_parse_target(
 389                 const char *filename,
 390                 unsigned line,
 391                 const char *section,
 392                 const char *lvalue,
 393                 const char *rvalue,
 394                 void *data,
 395                 void *userdata) {
 396
 397         assert(filename);
 398         assert(lvalue);
 399         assert(rvalue);
 400
 401         log_set_target_from_string(rvalue);
 402         return 0;
 403 }
 404
 405 static int config_parse_color(
 406                 const char *filename,
 407                 unsigned line,
 408                 const char *section,
 409                 const char *lvalue,
 410                 const char *rvalue,
 411                 void *data,
 412                 void *userdata) {
 413
 414         assert(filename);
 415         assert(lvalue);
 416         assert(rvalue);
 417
 418         log_show_color_from_string(rvalue);
 419         return 0;
 420 }
 421
 422 static int config_parse_location(
 423                 const char *filename,
 424                 unsigned line,
 425                 const char *section,
 426                 const char *lvalue,
 427                 const char *rvalue,
 428                 void *data,
 429                 void *userdata) {
 430
 431         assert(filename);
 432         assert(lvalue);
 433         assert(rvalue);
 434
 435         log_show_location_from_string(rvalue);
 436         return 0;
 437 }
 438
 439 static int config_parse_cpu_affinity(
 440                 const char *filename,
 441                 unsigned line,
 442                 const char *section,
 443                 const char *lvalue,
 444                 const char *rvalue,
 445                 void *data,
 446                 void *userdata) {
 447
 448         char *w;
 449         size_t l;
 450         char *state;
 451         cpu_set_t *c = NULL;
 452         unsigned ncpus = 0;
 453
 454         assert(filename);
 455         assert(lvalue);
 456         assert(rvalue);
 457
 458         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 459                 char *t;
 460                 int r;
 461                 unsigned cpu;
 462
 463                 if (!(t = strndup(w, l)))
 464                         return -ENOMEM;
 465
 466                 r = safe_atou(t, &cpu);
 467                 free(t);
 468
 469                 if (!c)
 470                         if (!(c = cpu_set_malloc(&ncpus)))
 471                                 return -ENOMEM;
 472
 473                 if (r < 0 || cpu >= ncpus) {
 474                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 475                         CPU_FREE(c);
 476                         return -EBADMSG;
 477                 }
 478
 479                 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
 480         }
 481
 482         if (c) {
 483                 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
 484                         log_warning("Failed to set CPU affinity: %m");
 485
 486                 CPU_FREE(c);
 487         }
 488
 489         return 0;
 490 }
 491
 492 static DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
 493
 494 static int parse_config_file(void) {
 495
 496         const ConfigItem items[] = {
 497                 { "LogLevel",              config_parse_level,        NULL,                     "Manager" },
 498                 { "LogTarget",             config_parse_target,       NULL,                     "Manager" },
 499                 { "LogColor",              config_parse_color,        NULL,                     "Manager" },
 500                 { "LogLocation",           config_parse_location,     NULL,                     "Manager" },
 501                 { "DumpCore",              config_parse_bool,         &arg_dump_core,           "Manager" },
 502                 { "CrashShell",            config_parse_bool,         &arg_crash_shell,         "Manager" },
 503                 { "ShowStatus",            config_parse_bool,         &arg_show_status,         "Manager" },
 504 #ifdef HAVE_SYSV_COMPAT
 505                 { "SysVConsole",           config_parse_bool,         &arg_sysv_console,        "Manager" },
 506 #endif
 507                 { "CrashChVT",             config_parse_int,          &arg_crash_chvt,          "Manager" },
 508                 { "CPUAffinity",           config_parse_cpu_affinity, NULL,                     "Manager" },
 509                 { "MountAuto",             config_parse_bool,         &arg_mount_auto,          "Manager" },
 510                 { "SwapAuto",              config_parse_bool,         &arg_swap_auto,           "Manager" },
 511                 { "DefaultControllers",    config_parse_strv,         &arg_default_controllers, "Manager" },
 512                 { "DefaultStandardOutput", config_parse_output,       &arg_default_std_output,  "Manager" },
 513                 { "DefaultStandardError",  config_parse_output,       &arg_default_std_error,   "Manager" },
 514                 { NULL, NULL, NULL, NULL }
 515         };
 516
 517         static const char * const sections[] = {
 518                 "Manager",
 519                 NULL
 520         };
 521
 522         FILE *f;
 523         const char *fn;
 524         int r;
 525
 526         fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
 527
 528         if (!(f = fopen(fn, "re"))) {
 529                 if (errno == ENOENT)
 530                         return 0;
 531
 532                 log_warning("Failed to open configuration file '%s': %m", fn);
 533                 return 0;
 534         }
 535
 536         if ((r = config_parse(fn, f, sections, items, false, NULL)) < 0)
 537                 log_warning("Failed to parse configuration file: %s", strerror(-r));
 538
 539         fclose(f);
 540
 541         return 0;
 542 }
 543
 544 static int parse_proc_cmdline(void) {
 545         char *line, *w, *state;
 546         int r;
 547         size_t l;
 548
 549         if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
 550                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
 551                 return 0;
 552         }
 553
 554         FOREACH_WORD_QUOTED(w, l, line, state) {
 555                 char *word;
 556
 557                 if (!(word = strndup(w, l))) {
 558                         r = -ENOMEM;
 559                         goto finish;
 560                 }
 561
 562                 r = parse_proc_cmdline_word(word);
 563                 free(word);
 564
 565                 if (r < 0)
 566                         goto finish;
 567         }
 568
 569         r = 0;
 570
 571 finish:
 572         free(line);
 573         return r;
 574 }
 575
 576 static int parse_argv(int argc, char *argv[]) {
 577
 578         enum {
 579                 ARG_LOG_LEVEL = 0x100,
 580                 ARG_LOG_TARGET,
 581                 ARG_LOG_COLOR,
 582                 ARG_LOG_LOCATION,
 583                 ARG_UNIT,
 584                 ARG_SYSTEM,
 585                 ARG_USER,
 586                 ARG_TEST,
 587                 ARG_DUMP_CONFIGURATION_ITEMS,
 588                 ARG_DUMP_CORE,
 589                 ARG_CRASH_SHELL,
 590                 ARG_CONFIRM_SPAWN,
 591                 ARG_SHOW_STATUS,
 592                 ARG_SYSV_CONSOLE,
 593                 ARG_DESERIALIZE,
 594                 ARG_INTROSPECT,
 595                 ARG_DEFAULT_STD_OUTPUT,
 596                 ARG_DEFAULT_STD_ERROR
 597         };
 598
 599         static const struct option options[] = {
 600                 { "log-level",                required_argument, NULL, ARG_LOG_LEVEL                },
 601                 { "log-target",               required_argument, NULL, ARG_LOG_TARGET               },
 602                 { "log-color",                optional_argument, NULL, ARG_LOG_COLOR                },
 603                 { "log-location",             optional_argument, NULL, ARG_LOG_LOCATION             },
 604                 { "unit",                     required_argument, NULL, ARG_UNIT                     },
 605                 { "system",                   no_argument,       NULL, ARG_SYSTEM                   },
 606                 { "user",                     no_argument,       NULL, ARG_USER                     },
 607                 { "test",                     no_argument,       NULL, ARG_TEST                     },
 608                 { "help",                     no_argument,       NULL, 'h'                          },
 609                 { "dump-configuration-items", no_argument,       NULL, ARG_DUMP_CONFIGURATION_ITEMS },
 610                 { "dump-core",                no_argument,       NULL, ARG_DUMP_CORE                },
 611                 { "crash-shell",              no_argument,       NULL, ARG_CRASH_SHELL              },
 612                 { "confirm-spawn",            no_argument,       NULL, ARG_CONFIRM_SPAWN            },
 613                 { "show-status",              optional_argument, NULL, ARG_SHOW_STATUS              },
 614 #ifdef HAVE_SYSV_COMPAT
 615                 { "sysv-console",             optional_argument, NULL, ARG_SYSV_CONSOLE             },
 616 #endif
 617                 { "deserialize",              required_argument, NULL, ARG_DESERIALIZE              },
 618                 { "introspect",               optional_argument, NULL, ARG_INTROSPECT               },
 619                 { "default-standard-output",  required_argument, NULL, ARG_DEFAULT_STD_OUTPUT,      },
 620                 { "default-standard-error",   required_argument, NULL, ARG_DEFAULT_STD_ERROR,       },
 621                 { NULL,                       0,                 NULL, 0                            }
 622         };
 623
 624         int c, r;
 625
 626         assert(argc >= 1);
 627         assert(argv);
 628
 629         while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
 630
 631                 switch (c) {
 632
 633                 case ARG_LOG_LEVEL:
 634                         if ((r = log_set_max_level_from_string(optarg)) < 0) {
 635                                 log_error("Failed to parse log level %s.", optarg);
 636                                 return r;
 637                         }
 638
 639                         break;
 640
 641                 case ARG_LOG_TARGET:
 642
 643                         if ((r = log_set_target_from_string(optarg)) < 0) {
 644                                 log_error("Failed to parse log target %s.", optarg);
 645                                 return r;
 646                         }
 647
 648                         break;
 649
 650                 case ARG_LOG_COLOR:
 651
 652                         if (optarg) {
 653                                 if ((r = log_show_color_from_string(optarg)) < 0) {
 654                                         log_error("Failed to parse log color setting %s.", optarg);
 655                                         return r;
 656                                 }
 657                         } else
 658                                 log_show_color(true);
 659
 660                         break;
 661
 662                 case ARG_LOG_LOCATION:
 663
 664                         if (optarg) {
 665                                 if ((r = log_show_location_from_string(optarg)) < 0) {
 666                                         log_error("Failed to parse log location setting %s.", optarg);
 667                                         return r;
 668                                 }
 669                         } else
 670                                 log_show_location(true);
 671
 672                         break;
 673
 674                 case ARG_DEFAULT_STD_OUTPUT:
 675
 676                         if ((r = exec_output_from_string(optarg)) < 0) {
 677                                 log_error("Failed to parse default standard output setting %s.", optarg);
 678                                 return r;
 679                         } else
 680                                 arg_default_std_output = r;
 681                         break;
 682
 683                 case ARG_DEFAULT_STD_ERROR:
 684
 685                         if ((r = exec_output_from_string(optarg)) < 0) {
 686                                 log_error("Failed to parse default standard error output setting %s.", optarg);
 687                                 return r;
 688                         } else
 689                                 arg_default_std_error = r;
 690                         break;
 691
 692                 case ARG_UNIT:
 693
 694                         if ((r = set_default_unit(optarg)) < 0) {
 695                                 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
 696                                 return r;
 697                         }
 698
 699                         break;
 700
 701                 case ARG_SYSTEM:
 702                         arg_running_as = MANAGER_SYSTEM;
 703                         break;
 704
 705                 case ARG_USER:
 706                         arg_running_as = MANAGER_USER;
 707                         break;
 708
 709                 case ARG_TEST:
 710                         arg_action = ACTION_TEST;
 711                         break;
 712
 713                 case ARG_DUMP_CONFIGURATION_ITEMS:
 714                         arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
 715                         break;
 716
 717                 case ARG_DUMP_CORE:
 718                         arg_dump_core = true;
 719                         break;
 720
 721                 case ARG_CRASH_SHELL:
 722                         arg_crash_shell = true;
 723                         break;
 724
 725                 case ARG_CONFIRM_SPAWN:
 726                         arg_confirm_spawn = true;
 727                         break;
 728
 729                 case ARG_SHOW_STATUS:
 730
 731                         if (optarg) {
 732                                 if ((r = parse_boolean(optarg)) < 0) {
 733                                         log_error("Failed to show status boolean %s.", optarg);
 734                                         return r;
 735                                 }
 736                                 arg_show_status = r;
 737                         } else
 738                                 arg_show_status = true;
 739                         break;
 740 #ifdef HAVE_SYSV_COMPAT
 741                 case ARG_SYSV_CONSOLE:
 742
 743                         if (optarg) {
 744                                 if ((r = parse_boolean(optarg)) < 0) {
 745                                         log_error("Failed to SysV console boolean %s.", optarg);
 746                                         return r;
 747                                 }
 748                                 arg_sysv_console = r;
 749                         } else
 750                                 arg_sysv_console = true;
 751                         break;
 752 #endif
 753
 754                 case ARG_DESERIALIZE: {
 755                         int fd;
 756                         FILE *f;
 757
 758                         if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
 759                                 log_error("Failed to parse deserialize option %s.", optarg);
 760                                 return r;
 761                         }
 762
 763                         if (!(f = fdopen(fd, "r"))) {
 764                                 log_error("Failed to open serialization fd: %m");
 765                                 return r;
 766                         }
 767
 768                         if (serialization)
 769                                 fclose(serialization);
 770
 771                         serialization = f;
 772
 773                         break;
 774                 }
 775
 776                 case ARG_INTROSPECT: {
 777                         const char * const * i = NULL;
 778
 779                         for (i = bus_interface_table; *i; i += 2)
 780                                 if (!optarg || streq(i[0], optarg)) {
 781                                         fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
 782                                               "<node>\n", stdout);
 783                                         fputs(i[1], stdout);
 784                                         fputs("</node>\n", stdout);
 785
 786                                         if (optarg)
 787                                                 break;
 788                                 }
 789
 790                         if (!i[0] && optarg)
 791                                 log_error("Unknown interface %s.", optarg);
 792
 793                         arg_action = ACTION_DONE;
 794                         break;
 795                 }
 796
 797                 case 'h':
 798                         arg_action = ACTION_HELP;
 799                         break;
 800
 801                 case 'D':
 802                         log_set_max_level(LOG_DEBUG);
 803                         break;
 804
 805                 case 'b':
 806                 case 's':
 807                 case 'z':
 808                         /* Just to eat away the sysvinit kernel
 809                          * cmdline args without getopt() error
 810                          * messages that we'll parse in
 811                          * parse_proc_cmdline_word() or ignore. */
 812
 813                 case '?':
 814                 default:
 815                         if (getpid() != 1) {
 816                                 log_error("Unknown option code %c", c);
 817                                 return -EINVAL;
 818                         }
 819
 820                         break;
 821                 }
 822
 823         /* PID 1 will get the kernel arguments as parameters, which we
 824          * ignore and unconditionally read from
 825          * /proc/cmdline. However, we need to ignore those arguments
 826          * here. */
 827         if (getpid() != 1 && optind < argc) {
 828                 log_error("Excess arguments.");
 829                 return -EINVAL;
 830         }
 831
 832         return 0;
 833 }
 834
 835 static int help(void) {
 836
 837         printf("%s [OPTIONS...]\n\n"
 838                "Starts up and maintains the system or user services.\n\n"
 839                "  -h --help                      Show this help\n"
 840                "     --test                      Determine startup sequence, dump it and exit\n"
 841                "     --dump-configuration-items  Dump understood unit configuration items\n"
 842                "     --introspect[=INTERFACE]    Extract D-Bus interface data\n"
 843                "     --unit=UNIT                 Set default unit\n"
 844                "     --system                    Run a system instance, even if PID != 1\n"
 845                "     --user                      Run a user instance\n"
 846                "     --dump-core                 Dump core on crash\n"
 847                "     --crash-shell               Run shell on crash\n"
 848                "     --confirm-spawn             Ask for confirmation when spawning processes\n"
 849                "     --show-status[=0|1]         Show status updates on the console during bootup\n"
 850 #ifdef HAVE_SYSV_COMPAT
 851                "     --sysv-console[=0|1]        Connect output of SysV scripts to console\n"
 852 #endif
 853                "     --log-target=TARGET         Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
 854                "     --log-level=LEVEL           Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
 855                "     --log-color[=0|1]           Highlight important log messages\n"
 856                "     --log-location[=0|1]        Include code location in log messages\n"
 857                "     --default-standard-output=  Set default standard output for services\n"
 858                "     --default-standard-error=   Set default standard error output for services\n",
 859                program_invocation_short_name);
 860
 861         return 0;
 862 }
 863
 864 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
 865         FILE *f = NULL;
 866         FDSet *fds = NULL;
 867         int r;
 868
 869         assert(m);
 870         assert(_f);
 871         assert(_fds);
 872
 873         if ((r = manager_open_serialization(m, &f)) < 0) {
 874                 log_error("Failed to create serialization file: %s", strerror(-r));
 875                 goto fail;
 876         }
 877
 878         if (!(fds = fdset_new())) {
 879                 r = -ENOMEM;
 880                 log_error("Failed to allocate fd set: %s", strerror(-r));
 881                 goto fail;
 882         }
 883
 884         if ((r = manager_serialize(m, f, fds)) < 0) {
 885                 log_error("Failed to serialize state: %s", strerror(-r));
 886                 goto fail;
 887         }
 888
 889         if (fseeko(f, 0, SEEK_SET) < 0) {
 890                 log_error("Failed to rewind serialization fd: %m");
 891                 goto fail;
 892         }
 893
 894         if ((r = fd_cloexec(fileno(f), false)) < 0) {
 895                 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
 896                 goto fail;
 897         }
 898
 899         if ((r = fdset_cloexec(fds, false)) < 0) {
 900                 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
 901                 goto fail;
 902         }
 903
 904         *_f = f;
 905         *_fds = fds;
 906
 907         return 0;
 908
 909 fail:
 910         fdset_free(fds);
 911
 912         if (f)
 913                 fclose(f);
 914
 915         return r;
 916 }
 917
 918 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
 919         const char *e;
 920         unsigned long long a, b;
 921
 922         assert(t);
 923
 924         if (!(e = getenv("RD_TIMESTAMP")))
 925                 return NULL;
 926
 927         if (sscanf(e, "%llu %llu", &a, &b) != 2)
 928                 return NULL;
 929
 930         t->realtime = (usec_t) a;
 931         t->monotonic = (usec_t) b;
 932
 933         return t;
 934 }
 935
 936 static void test_mtab(void) {
 937         char *p;
 938
 939         /* Check that /etc/mtab is a symlink */
 940
 941         if (readlink_malloc("/etc/mtab", &p) >= 0) {
 942                 bool b;
 943
 944                 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
 945                 free(p);
 946
 947                 if (b)
 948                         return;
 949         }
 950
 951         log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
 952                     "This is not supported anymore. "
 953                     "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
 954 }
 955
 956 static void test_usr(void) {
 957
 958         /* Check that /usr is not a separate fs */
 959
 960         if (dir_is_empty("/usr") > 0)
 961                 log_warning("/usr appears to be on a different file system than /. This is not supported anymore. "
 962                             "Some things will probably break (sometimes even silently) in mysterious ways. "
 963                             "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
 964 }
 965
 966 int main(int argc, char *argv[]) {
 967         Manager *m = NULL;
 968         int r, retval = EXIT_FAILURE;
 969         FDSet *fds = NULL;
 970         bool reexecute = false;
 971         const char *shutdown_verb = NULL;
 972         dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
 973         char systemd[] = "systemd";
 974
 975         if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
 976                 /* This is compatibility support for SysV, where
 977                  * calling init as a user is identical to telinit. */
 978
 979                 errno = -ENOENT;
 980                 execv(SYSTEMCTL_BINARY_PATH, argv);
 981                 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
 982                 return 1;
 983         }
 984
 985         /* If we get started via the /sbin/init symlink then we are
 986            called 'init'. After a subsequent reexecution we are then
 987            called 'systemd'. That is confusing, hence let's call us
 988            systemd right-away. */
 989
 990         program_invocation_short_name = systemd;
 991         prctl(PR_SET_NAME, systemd);
 992
 993         log_show_color(isatty(STDERR_FILENO) > 0);
 994         log_show_location(false);
 995         log_set_max_level(LOG_INFO);
 996
 997         if (getpid() == 1) {
 998                 arg_running_as = MANAGER_SYSTEM;
 999                 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1000
1001                 /* This might actually not return, but cause a
1002                  * reexecution */
1003                 if (selinux_setup(argv) < 0)
1004                         goto finish;
1005
1006                 if (label_init() < 0)
1007                         goto finish;
1008         } else {
1009                 arg_running_as = MANAGER_USER;
1010                 log_set_target(LOG_TARGET_CONSOLE);
1011         }
1012
1013         if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1014                 goto finish;
1015
1016         /* Mount /proc, /sys and friends, so that /proc/cmdline and
1017          * /proc/$PID/fd is available. */
1018         if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS"))
1019                 if (mount_setup() < 0)
1020                         goto finish;
1021
1022         /* Reset all signal handlers. */
1023         assert_se(reset_all_signal_handlers() == 0);
1024
1025         /* If we are init, we can block sigkill. Yay. */
1026         ignore_signals(SIGNALS_IGNORE, -1);
1027
1028         if (parse_config_file() < 0)
1029                 goto finish;
1030
1031         if (arg_running_as == MANAGER_SYSTEM)
1032                 if (parse_proc_cmdline() < 0)
1033                         goto finish;
1034
1035         log_parse_environment();
1036
1037         if (parse_argv(argc, argv) < 0)
1038                 goto finish;
1039
1040         if (arg_action == ACTION_TEST && geteuid() == 0) {
1041                 log_error("Don't run test mode as root.");
1042                 goto finish;
1043         }
1044
1045         if (arg_running_as == MANAGER_SYSTEM &&
1046             arg_action == ACTION_RUN &&
1047             running_in_chroot() > 0) {
1048                 log_error("Cannot be run in a chroot() environment.");
1049                 goto finish;
1050         }
1051
1052         /* If Plymouth is being run make sure we show the status, so
1053          * that there's something nice to see when people press Esc */
1054         if (access("/dev/.systemd/plymouth", F_OK) >= 0)
1055                 arg_show_status = true;
1056
1057         if (arg_action == ACTION_HELP) {
1058                 retval = help();
1059                 goto finish;
1060         } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1061                 unit_dump_config_items(stdout);
1062                 retval = EXIT_SUCCESS;
1063                 goto finish;
1064         } else if (arg_action == ACTION_DONE) {
1065                 retval = EXIT_SUCCESS;
1066                 goto finish;
1067         }
1068
1069         assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1070
1071         /* Remember open file descriptors for later deserialization */
1072         if (serialization) {
1073                 if ((r = fdset_new_fill(&fds)) < 0) {
1074                         log_error("Failed to allocate fd set: %s", strerror(-r));
1075                         goto finish;
1076                 }
1077
1078                 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1079         } else
1080                 close_all_fds(NULL, 0);
1081
1082         /* Set up PATH unless it is already set */
1083         setenv("PATH",
1084                "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1085                arg_running_as == MANAGER_SYSTEM);
1086
1087         if (arg_running_as == MANAGER_SYSTEM) {
1088                 /* Parse the data passed to us by the initrd and unset it */
1089                 parse_initrd_timestamp(&initrd_timestamp);
1090                 filter_environ("RD_");
1091
1092                 /* Unset some environment variables passed in from the
1093                  * kernel that don't really make sense for us. */
1094                 unsetenv("HOME");
1095                 unsetenv("TERM");
1096         }
1097
1098         /* Move out of the way, so that we won't block unmounts */
1099         assert_se(chdir("/")  == 0);
1100
1101         if (arg_running_as == MANAGER_SYSTEM) {
1102                 /* Become a session leader if we aren't one yet. */
1103                 setsid();
1104
1105                 /* Disable the umask logic */
1106                 umask(0);
1107         }
1108
1109         /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1110         dbus_connection_set_change_sigpipe(FALSE);
1111
1112         /* Reset the console, but only if this is really init and we
1113          * are freshly booted */
1114         if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1115                 console_setup(getpid() == 1 && !serialization);
1116                 make_null_stdio();
1117         }
1118
1119         /* Open the logging devices, if possible and necessary */
1120         log_open();
1121
1122         /* Make sure we leave a core dump without panicing the
1123          * kernel. */
1124         if (getpid() == 1)
1125                 install_crash_handler();
1126
1127         log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1128                  PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1129
1130         if (arg_running_as == MANAGER_SYSTEM && !serialization) {
1131                 locale_setup();
1132
1133                 if (arg_show_status)
1134                         status_welcome();
1135
1136                 kmod_setup();
1137                 hostname_setup();
1138                 machine_id_setup();
1139                 loopback_setup();
1140
1141                 test_mtab();
1142                 test_usr();
1143         }
1144
1145         if ((r = manager_new(arg_running_as, &m)) < 0) {
1146                 log_error("Failed to allocate manager object: %s", strerror(-r));
1147                 goto finish;
1148         }
1149
1150         m->confirm_spawn = arg_confirm_spawn;
1151         m->show_status = arg_show_status;
1152 #ifdef HAVE_SYSV_COMPAT
1153         m->sysv_console = arg_sysv_console;
1154 #endif
1155         m->mount_auto = arg_mount_auto;
1156         m->swap_auto = arg_swap_auto;
1157         m->default_std_output = arg_default_std_output;
1158         m->default_std_error = arg_default_std_error;
1159
1160         if (dual_timestamp_is_set(&initrd_timestamp))
1161                 m->initrd_timestamp = initrd_timestamp;
1162
1163         if (arg_default_controllers)
1164                 manager_set_default_controllers(m, arg_default_controllers);
1165
1166         if ((r = manager_startup(m, serialization, fds)) < 0)
1167                 log_error("Failed to fully start up daemon: %s", strerror(-r));
1168
1169         if (fds) {
1170                 /* This will close all file descriptors that were opened, but
1171                  * not claimed by any unit. */
1172
1173                 fdset_free(fds);
1174                 fds = NULL;
1175         }
1176
1177         if (serialization) {
1178                 fclose(serialization);
1179                 serialization = NULL;
1180         } else {
1181                 DBusError error;
1182                 Unit *target = NULL;
1183
1184                 dbus_error_init(&error);
1185
1186                 log_debug("Activating default unit: %s", arg_default_unit);
1187
1188                 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1189                         log_error("Failed to load default target: %s", bus_error(&error, r));
1190                         dbus_error_free(&error);
1191                 } else if (target->meta.load_state == UNIT_ERROR)
1192                         log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
1193                 else if (target->meta.load_state == UNIT_MASKED)
1194                         log_error("Default target masked.");
1195
1196                 if (!target || target->meta.load_state != UNIT_LOADED) {
1197                         log_info("Trying to load rescue target...");
1198
1199                         if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1200                                 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1201                                 dbus_error_free(&error);
1202                                 goto finish;
1203                         } else if (target->meta.load_state == UNIT_ERROR) {
1204                                 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1205                                 goto finish;
1206                         } else if (target->meta.load_state == UNIT_MASKED) {
1207                                 log_error("Rescue target masked.");
1208                                 goto finish;
1209                         }
1210                 }
1211
1212                 assert(target->meta.load_state == UNIT_LOADED);
1213
1214                 if (arg_action == ACTION_TEST) {
1215                         printf("-> By units:\n");
1216                         manager_dump_units(m, stdout, "\t");
1217                 }
1218
1219                 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
1220                         log_error("Failed to start default target: %s", bus_error(&error, r));
1221                         dbus_error_free(&error);
1222                         goto finish;
1223                 }
1224
1225                 if (arg_action == ACTION_TEST) {
1226                         printf("-> By jobs:\n");
1227                         manager_dump_jobs(m, stdout, "\t");
1228                         retval = EXIT_SUCCESS;
1229                         goto finish;
1230                 }
1231         }
1232
1233         for (;;) {
1234                 if ((r = manager_loop(m)) < 0) {
1235                         log_error("Failed to run mainloop: %s", strerror(-r));
1236                         goto finish;
1237                 }
1238
1239                 switch (m->exit_code) {
1240
1241                 case MANAGER_EXIT:
1242                         retval = EXIT_SUCCESS;
1243                         log_debug("Exit.");
1244                         goto finish;
1245
1246                 case MANAGER_RELOAD:
1247                         log_info("Reloading.");
1248                         if ((r = manager_reload(m)) < 0)
1249                                 log_error("Failed to reload: %s", strerror(-r));
1250                         break;
1251
1252                 case MANAGER_REEXECUTE:
1253                         if (prepare_reexecute(m, &serialization, &fds) < 0)
1254                                 goto finish;
1255
1256                         reexecute = true;
1257                         log_notice("Reexecuting.");
1258                         goto finish;
1259
1260                 case MANAGER_REBOOT:
1261                 case MANAGER_POWEROFF:
1262                 case MANAGER_HALT:
1263                 case MANAGER_KEXEC: {
1264                         static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1265                                 [MANAGER_REBOOT] = "reboot",
1266                                 [MANAGER_POWEROFF] = "poweroff",
1267                                 [MANAGER_HALT] = "halt",
1268                                 [MANAGER_KEXEC] = "kexec"
1269                         };
1270
1271                         assert_se(shutdown_verb = table[m->exit_code]);
1272
1273                         log_notice("Shutting down.");
1274                         goto finish;
1275                 }
1276
1277                 default:
1278                         assert_not_reached("Unknown exit code.");
1279                 }
1280         }
1281
1282 finish:
1283         if (m)
1284                 manager_free(m);
1285
1286         free(arg_default_unit);
1287         strv_free(arg_default_controllers);
1288
1289         dbus_shutdown();
1290
1291         label_finish();
1292
1293         if (reexecute) {
1294                 const char *args[15];
1295                 unsigned i = 0;
1296                 char sfd[16];
1297
1298                 assert(serialization);
1299                 assert(fds);
1300
1301                 args[i++] = SYSTEMD_BINARY_PATH;
1302
1303                 args[i++] = "--log-level";
1304                 args[i++] = log_level_to_string(log_get_max_level());
1305
1306                 args[i++] = "--log-target";
1307                 args[i++] = log_target_to_string(log_get_target());
1308
1309                 if (arg_running_as == MANAGER_SYSTEM)
1310                         args[i++] = "--system";
1311                 else
1312                         args[i++] = "--user";
1313
1314                 if (arg_dump_core)
1315                         args[i++] = "--dump-core";
1316
1317                 if (arg_crash_shell)
1318                         args[i++] = "--crash-shell";
1319
1320                 if (arg_confirm_spawn)
1321                         args[i++] = "--confirm-spawn";
1322
1323                 if (arg_show_status)
1324                         args[i++] = "--show-status=1";
1325                 else
1326                         args[i++] = "--show-status=0";
1327
1328 #ifdef HAVE_SYSV_COMPAT
1329                 if (arg_sysv_console)
1330                         args[i++] = "--sysv-console=1";
1331                 else
1332                         args[i++] = "--sysv-console=0";
1333 #endif
1334
1335                 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1336                 char_array_0(sfd);
1337
1338                 args[i++] = "--deserialize";
1339                 args[i++] = sfd;
1340
1341                 args[i++] = NULL;
1342
1343                 assert(i <= ELEMENTSOF(args));
1344
1345                 execv(args[0], (char* const*) args);
1346
1347                 log_error("Failed to reexecute: %m");
1348         }
1349
1350         if (serialization)
1351                 fclose(serialization);
1352
1353         if (fds)
1354                 fdset_free(fds);
1355
1356         if (shutdown_verb) {
1357                 const char * command_line[] = {
1358                         SYSTEMD_SHUTDOWN_BINARY_PATH,
1359                         shutdown_verb,
1360                         NULL
1361                 };
1362
1363                 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1364                 log_error("Failed to execute shutdown binary, freezing: %m");
1365         }
1366
1367         if (getpid() == 1)
1368                 freeze();
1369
1370         return retval;
1371 }