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                 "single",    SPECIAL_RESCUE_TARGET,
 230                 "-s",        SPECIAL_RESCUE_TARGET,
 231                 "s",         SPECIAL_RESCUE_TARGET,
 232                 "S",         SPECIAL_RESCUE_TARGET,
 233                 "1",         SPECIAL_RESCUE_TARGET,
 234                 "2",         SPECIAL_RUNLEVEL2_TARGET,
 235                 "3",         SPECIAL_RUNLEVEL3_TARGET,
 236                 "4",         SPECIAL_RUNLEVEL4_TARGET,
 237                 "5",         SPECIAL_RUNLEVEL5_TARGET,
 238         };
 239
 240         assert(word);
 241
 242         if (startswith(word, "systemd.unit="))
 243                 return set_default_unit(word + 13);
 244
 245         else if (startswith(word, "systemd.log_target=")) {
 246
 247                 if (log_set_target_from_string(word + 19) < 0)
 248                         log_warning("Failed to parse log target %s. Ignoring.", word + 19);
 249
 250         } else if (startswith(word, "systemd.log_level=")) {
 251
 252                 if (log_set_max_level_from_string(word + 18) < 0)
 253                         log_warning("Failed to parse log level %s. Ignoring.", word + 18);
 254
 255         } else if (startswith(word, "systemd.log_color=")) {
 256
 257                 if (log_show_color_from_string(word + 18) < 0)
 258                         log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
 259
 260         } else if (startswith(word, "systemd.log_location=")) {
 261
 262                 if (log_show_location_from_string(word + 21) < 0)
 263                         log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
 264
 265         } else if (startswith(word, "systemd.dump_core=")) {
 266                 int r;
 267
 268                 if ((r = parse_boolean(word + 18)) < 0)
 269                         log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
 270                 else
 271                         arg_dump_core = r;
 272
 273         } else if (startswith(word, "systemd.crash_shell=")) {
 274                 int r;
 275
 276                 if ((r = parse_boolean(word + 20)) < 0)
 277                         log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
 278                 else
 279                         arg_crash_shell = r;
 280
 281         } else if (startswith(word, "systemd.confirm_spawn=")) {
 282                 int r;
 283
 284                 if ((r = parse_boolean(word + 22)) < 0)
 285                         log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
 286                 else
 287                         arg_confirm_spawn = r;
 288
 289         } else if (startswith(word, "systemd.crash_chvt=")) {
 290                 int k;
 291
 292                 if (safe_atoi(word + 19, &k) < 0)
 293                         log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
 294                 else
 295                         arg_crash_chvt = k;
 296
 297         } else if (startswith(word, "systemd.show_status=")) {
 298                 int r;
 299
 300                 if ((r = parse_boolean(word + 20)) < 0)
 301                         log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
 302                 else
 303                         arg_show_status = r;
 304         } else if (startswith(word, "systemd.default_standard_output=")) {
 305                 int r;
 306
 307                 if ((r = exec_output_from_string(word + 32)) < 0)
 308                         log_warning("Failed to parse default standard output switch %s, Ignoring.", word + 32);
 309                 else
 310                         arg_default_std_output = r;
 311         } else if (startswith(word, "systemd.default_standard_error=")) {
 312                 int r;
 313
 314                 if ((r = exec_output_from_string(word + 31)) < 0)
 315                         log_warning("Failed to parse default standard error switch %s, Ignoring.", word + 31);
 316                 else
 317                         arg_default_std_error = r;
 318 #ifdef HAVE_SYSV_COMPAT
 319         } else if (startswith(word, "systemd.sysv_console=")) {
 320                 int r;
 321
 322                 if ((r = parse_boolean(word + 21)) < 0)
 323                         log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
 324                 else
 325                         arg_sysv_console = r;
 326 #endif
 327
 328         } else if (startswith(word, "systemd.")) {
 329
 330                 log_warning("Unknown kernel switch %s. Ignoring.", word);
 331
 332                 log_info("Supported kernel switches:\n"
 333                          "systemd.unit=UNIT                        Default unit to start\n"
 334                          "systemd.dump_core=0|1                    Dump core on crash\n"
 335                          "systemd.crash_shell=0|1                  Run shell on crash\n"
 336                          "systemd.crash_chvt=N                     Change to VT #N on crash\n"
 337                          "systemd.confirm_spawn=0|1                Confirm every process spawn\n"
 338                          "systemd.show_status=0|1                  Show status updates on the console during bootup\n"
 339 #ifdef HAVE_SYSV_COMPAT
 340                          "systemd.sysv_console=0|1                 Connect output of SysV scripts to console\n"
 341 #endif
 342                          "systemd.log_target=console|kmsg|syslog|syslog-or-kmsg|null\n"
 343                          "                                         Log target\n"
 344                          "systemd.log_level=LEVEL                  Log level\n"
 345                          "systemd.log_color=0|1                    Highlight important log messages\n"
 346                          "systemd.log_location=0|1                 Include code location in log messages\n"
 347                          "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
 348                          "                                         Set default log output for services\n"
 349                          "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
 350                          "                                         Set default log error output for services\n");
 351
 352         } else if (streq(word, "quiet")) {
 353                 arg_show_status = false;
 354 #ifdef HAVE_SYSV_COMPAT
 355                 arg_sysv_console = false;
 356 #endif
 357         } else {
 358                 unsigned i;
 359
 360                 /* SysV compatibility */
 361                 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
 362                         if (streq(word, rlmap[i]))
 363                                 return set_default_unit(rlmap[i+1]);
 364         }
 365
 366         return 0;
 367 }
 368
 369 static int config_parse_level(
 370                 const char *filename,
 371                 unsigned line,
 372                 const char *section,
 373                 const char *lvalue,
 374                 const char *rvalue,
 375                 void *data,
 376                 void *userdata) {
 377
 378         assert(filename);
 379         assert(lvalue);
 380         assert(rvalue);
 381
 382         log_set_max_level_from_string(rvalue);
 383         return 0;
 384 }
 385
 386 static int config_parse_target(
 387                 const char *filename,
 388                 unsigned line,
 389                 const char *section,
 390                 const char *lvalue,
 391                 const char *rvalue,
 392                 void *data,
 393                 void *userdata) {
 394
 395         assert(filename);
 396         assert(lvalue);
 397         assert(rvalue);
 398
 399         log_set_target_from_string(rvalue);
 400         return 0;
 401 }
 402
 403 static int config_parse_color(
 404                 const char *filename,
 405                 unsigned line,
 406                 const char *section,
 407                 const char *lvalue,
 408                 const char *rvalue,
 409                 void *data,
 410                 void *userdata) {
 411
 412         assert(filename);
 413         assert(lvalue);
 414         assert(rvalue);
 415
 416         log_show_color_from_string(rvalue);
 417         return 0;
 418 }
 419
 420 static int config_parse_location(
 421                 const char *filename,
 422                 unsigned line,
 423                 const char *section,
 424                 const char *lvalue,
 425                 const char *rvalue,
 426                 void *data,
 427                 void *userdata) {
 428
 429         assert(filename);
 430         assert(lvalue);
 431         assert(rvalue);
 432
 433         log_show_location_from_string(rvalue);
 434         return 0;
 435 }
 436
 437 static int config_parse_cpu_affinity(
 438                 const char *filename,
 439                 unsigned line,
 440                 const char *section,
 441                 const char *lvalue,
 442                 const char *rvalue,
 443                 void *data,
 444                 void *userdata) {
 445
 446         char *w;
 447         size_t l;
 448         char *state;
 449         cpu_set_t *c = NULL;
 450         unsigned ncpus = 0;
 451
 452         assert(filename);
 453         assert(lvalue);
 454         assert(rvalue);
 455
 456         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 457                 char *t;
 458                 int r;
 459                 unsigned cpu;
 460
 461                 if (!(t = strndup(w, l)))
 462                         return -ENOMEM;
 463
 464                 r = safe_atou(t, &cpu);
 465                 free(t);
 466
 467                 if (!c)
 468                         if (!(c = cpu_set_malloc(&ncpus)))
 469                                 return -ENOMEM;
 470
 471                 if (r < 0 || cpu >= ncpus) {
 472                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 473                         CPU_FREE(c);
 474                         return -EBADMSG;
 475                 }
 476
 477                 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
 478         }
 479
 480         if (c) {
 481                 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
 482                         log_warning("Failed to set CPU affinity: %m");
 483
 484                 CPU_FREE(c);
 485         }
 486
 487         return 0;
 488 }
 489
 490 static DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
 491
 492 static int parse_config_file(void) {
 493
 494         const ConfigItem items[] = {
 495                 { "LogLevel",              config_parse_level,        NULL,                     "Manager" },
 496                 { "LogTarget",             config_parse_target,       NULL,                     "Manager" },
 497                 { "LogColor",              config_parse_color,        NULL,                     "Manager" },
 498                 { "LogLocation",           config_parse_location,     NULL,                     "Manager" },
 499                 { "DumpCore",              config_parse_bool,         &arg_dump_core,           "Manager" },
 500                 { "CrashShell",            config_parse_bool,         &arg_crash_shell,         "Manager" },
 501                 { "ShowStatus",            config_parse_bool,         &arg_show_status,         "Manager" },
 502 #ifdef HAVE_SYSV_COMPAT
 503                 { "SysVConsole",           config_parse_bool,         &arg_sysv_console,        "Manager" },
 504 #endif
 505                 { "CrashChVT",             config_parse_int,          &arg_crash_chvt,          "Manager" },
 506                 { "CPUAffinity",           config_parse_cpu_affinity, NULL,                     "Manager" },
 507                 { "MountAuto",             config_parse_bool,         &arg_mount_auto,          "Manager" },
 508                 { "SwapAuto",              config_parse_bool,         &arg_swap_auto,           "Manager" },
 509                 { "DefaultControllers",    config_parse_strv,         &arg_default_controllers, "Manager" },
 510                 { "DefaultStandardOutput", config_parse_output,       &arg_default_std_output,  "Manager" },
 511                 { "DefaultStandardError",  config_parse_output,       &arg_default_std_error,   "Manager" },
 512                 { NULL, NULL, NULL, NULL }
 513         };
 514
 515         static const char * const sections[] = {
 516                 "Manager",
 517                 NULL
 518         };
 519
 520         FILE *f;
 521         const char *fn;
 522         int r;
 523
 524         fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
 525
 526         if (!(f = fopen(fn, "re"))) {
 527                 if (errno == ENOENT)
 528                         return 0;
 529
 530                 log_warning("Failed to open configuration file '%s': %m", fn);
 531                 return 0;
 532         }
 533
 534         if ((r = config_parse(fn, f, sections, items, false, NULL)) < 0)
 535                 log_warning("Failed to parse configuration file: %s", strerror(-r));
 536
 537         fclose(f);
 538
 539         return 0;
 540 }
 541
 542 static int parse_proc_cmdline(void) {
 543         char *line, *w, *state;
 544         int r;
 545         size_t l;
 546
 547         if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
 548                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
 549                 return 0;
 550         }
 551
 552         FOREACH_WORD_QUOTED(w, l, line, state) {
 553                 char *word;
 554
 555                 if (!(word = strndup(w, l))) {
 556                         r = -ENOMEM;
 557                         goto finish;
 558                 }
 559
 560                 r = parse_proc_cmdline_word(word);
 561                 free(word);
 562
 563                 if (r < 0)
 564                         goto finish;
 565         }
 566
 567         r = 0;
 568
 569 finish:
 570         free(line);
 571         return r;
 572 }
 573
 574 static int parse_argv(int argc, char *argv[]) {
 575
 576         enum {
 577                 ARG_LOG_LEVEL = 0x100,
 578                 ARG_LOG_TARGET,
 579                 ARG_LOG_COLOR,
 580                 ARG_LOG_LOCATION,
 581                 ARG_UNIT,
 582                 ARG_SYSTEM,
 583                 ARG_USER,
 584                 ARG_TEST,
 585                 ARG_DUMP_CONFIGURATION_ITEMS,
 586                 ARG_DUMP_CORE,
 587                 ARG_CRASH_SHELL,
 588                 ARG_CONFIRM_SPAWN,
 589                 ARG_SHOW_STATUS,
 590                 ARG_SYSV_CONSOLE,
 591                 ARG_DESERIALIZE,
 592                 ARG_INTROSPECT,
 593                 ARG_DEFAULT_STD_OUTPUT,
 594                 ARG_DEFAULT_STD_ERROR
 595         };
 596
 597         static const struct option options[] = {
 598                 { "log-level",                required_argument, NULL, ARG_LOG_LEVEL                },
 599                 { "log-target",               required_argument, NULL, ARG_LOG_TARGET               },
 600                 { "log-color",                optional_argument, NULL, ARG_LOG_COLOR                },
 601                 { "log-location",             optional_argument, NULL, ARG_LOG_LOCATION             },
 602                 { "unit",                     required_argument, NULL, ARG_UNIT                     },
 603                 { "system",                   no_argument,       NULL, ARG_SYSTEM                   },
 604                 { "user",                     no_argument,       NULL, ARG_USER                     },
 605                 { "test",                     no_argument,       NULL, ARG_TEST                     },
 606                 { "help",                     no_argument,       NULL, 'h'                          },
 607                 { "dump-configuration-items", no_argument,       NULL, ARG_DUMP_CONFIGURATION_ITEMS },
 608                 { "dump-core",                no_argument,       NULL, ARG_DUMP_CORE                },
 609                 { "crash-shell",              no_argument,       NULL, ARG_CRASH_SHELL              },
 610                 { "confirm-spawn",            no_argument,       NULL, ARG_CONFIRM_SPAWN            },
 611                 { "show-status",              optional_argument, NULL, ARG_SHOW_STATUS              },
 612 #ifdef HAVE_SYSV_COMPAT
 613                 { "sysv-console",             optional_argument, NULL, ARG_SYSV_CONSOLE             },
 614 #endif
 615                 { "deserialize",              required_argument, NULL, ARG_DESERIALIZE              },
 616                 { "introspect",               optional_argument, NULL, ARG_INTROSPECT               },
 617                 { "default-standard-output",  required_argument, NULL, ARG_DEFAULT_STD_OUTPUT,      },
 618                 { "default-standard-error",   required_argument, NULL, ARG_DEFAULT_STD_ERROR,       },
 619                 { NULL,                       0,                 NULL, 0                            }
 620         };
 621
 622         int c, r;
 623
 624         assert(argc >= 1);
 625         assert(argv);
 626
 627         while ((c = getopt_long(argc, argv, "hD", options, NULL)) >= 0)
 628
 629                 switch (c) {
 630
 631                 case ARG_LOG_LEVEL:
 632                         if ((r = log_set_max_level_from_string(optarg)) < 0) {
 633                                 log_error("Failed to parse log level %s.", optarg);
 634                                 return r;
 635                         }
 636
 637                         break;
 638
 639                 case ARG_LOG_TARGET:
 640
 641                         if ((r = log_set_target_from_string(optarg)) < 0) {
 642                                 log_error("Failed to parse log target %s.", optarg);
 643                                 return r;
 644                         }
 645
 646                         break;
 647
 648                 case ARG_LOG_COLOR:
 649
 650                         if (optarg) {
 651                                 if ((r = log_show_color_from_string(optarg)) < 0) {
 652                                         log_error("Failed to parse log color setting %s.", optarg);
 653                                         return r;
 654                                 }
 655                         } else
 656                                 log_show_color(true);
 657
 658                         break;
 659
 660                 case ARG_LOG_LOCATION:
 661
 662                         if (optarg) {
 663                                 if ((r = log_show_location_from_string(optarg)) < 0) {
 664                                         log_error("Failed to parse log location setting %s.", optarg);
 665                                         return r;
 666                                 }
 667                         } else
 668                                 log_show_location(true);
 669
 670                         break;
 671
 672                 case ARG_DEFAULT_STD_OUTPUT:
 673
 674                         if ((r = exec_output_from_string(optarg)) < 0) {
 675                                 log_error("Failed to parse default standard output setting %s.", optarg);
 676                                 return r;
 677                         } else
 678                                 arg_default_std_output = r;
 679                         break;
 680
 681                 case ARG_DEFAULT_STD_ERROR:
 682
 683                         if ((r = exec_output_from_string(optarg)) < 0) {
 684                                 log_error("Failed to parse default standard error output setting %s.", optarg);
 685                                 return r;
 686                         } else
 687                                 arg_default_std_error = r;
 688                         break;
 689
 690                 case ARG_UNIT:
 691
 692                         if ((r = set_default_unit(optarg)) < 0) {
 693                                 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
 694                                 return r;
 695                         }
 696
 697                         break;
 698
 699                 case ARG_SYSTEM:
 700                         arg_running_as = MANAGER_SYSTEM;
 701                         break;
 702
 703                 case ARG_USER:
 704                         arg_running_as = MANAGER_USER;
 705                         break;
 706
 707                 case ARG_TEST:
 708                         arg_action = ACTION_TEST;
 709                         break;
 710
 711                 case ARG_DUMP_CONFIGURATION_ITEMS:
 712                         arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
 713                         break;
 714
 715                 case ARG_DUMP_CORE:
 716                         arg_dump_core = true;
 717                         break;
 718
 719                 case ARG_CRASH_SHELL:
 720                         arg_crash_shell = true;
 721                         break;
 722
 723                 case ARG_CONFIRM_SPAWN:
 724                         arg_confirm_spawn = true;
 725                         break;
 726
 727                 case ARG_SHOW_STATUS:
 728
 729                         if (optarg) {
 730                                 if ((r = parse_boolean(optarg)) < 0) {
 731                                         log_error("Failed to show status boolean %s.", optarg);
 732                                         return r;
 733                                 }
 734                                 arg_show_status = r;
 735                         } else
 736                                 arg_show_status = true;
 737                         break;
 738 #ifdef HAVE_SYSV_COMPAT
 739                 case ARG_SYSV_CONSOLE:
 740
 741                         if (optarg) {
 742                                 if ((r = parse_boolean(optarg)) < 0) {
 743                                         log_error("Failed to SysV console boolean %s.", optarg);
 744                                         return r;
 745                                 }
 746                                 arg_sysv_console = r;
 747                         } else
 748                                 arg_sysv_console = true;
 749                         break;
 750 #endif
 751
 752                 case ARG_DESERIALIZE: {
 753                         int fd;
 754                         FILE *f;
 755
 756                         if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
 757                                 log_error("Failed to parse deserialize option %s.", optarg);
 758                                 return r;
 759                         }
 760
 761                         if (!(f = fdopen(fd, "r"))) {
 762                                 log_error("Failed to open serialization fd: %m");
 763                                 return r;
 764                         }
 765
 766                         if (serialization)
 767                                 fclose(serialization);
 768
 769                         serialization = f;
 770
 771                         break;
 772                 }
 773
 774                 case ARG_INTROSPECT: {
 775                         const char * const * i = NULL;
 776
 777                         for (i = bus_interface_table; *i; i += 2)
 778                                 if (!optarg || streq(i[0], optarg)) {
 779                                         fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
 780                                               "<node>\n", stdout);
 781                                         fputs(i[1], stdout);
 782                                         fputs("</node>\n", stdout);
 783
 784                                         if (optarg)
 785                                                 break;
 786                                 }
 787
 788                         if (!i[0] && optarg)
 789                                 log_error("Unknown interface %s.", optarg);
 790
 791                         arg_action = ACTION_DONE;
 792                         break;
 793                 }
 794
 795                 case 'h':
 796                         arg_action = ACTION_HELP;
 797                         break;
 798
 799                 case 'D':
 800                         log_set_max_level(LOG_DEBUG);
 801                         break;
 802
 803                 case '?':
 804                         return -EINVAL;
 805
 806                 default:
 807                         log_error("Unknown option code %c", c);
 808                         return -EINVAL;
 809                 }
 810
 811         /* PID 1 will get the kernel arguments as parameters, which we
 812          * ignore and unconditionally read from
 813          * /proc/cmdline. However, we need to ignore those arguments
 814          * here. */
 815         if (arg_running_as != MANAGER_SYSTEM && optind < argc) {
 816                 log_error("Excess arguments.");
 817                 return -EINVAL;
 818         }
 819
 820         return 0;
 821 }
 822
 823 static int help(void) {
 824
 825         printf("%s [OPTIONS...]\n\n"
 826                "Starts up and maintains the system or user services.\n\n"
 827                "  -h --help                      Show this help\n"
 828                "     --test                      Determine startup sequence, dump it and exit\n"
 829                "     --dump-configuration-items  Dump understood unit configuration items\n"
 830                "     --introspect[=INTERFACE]    Extract D-Bus interface data\n"
 831                "     --unit=UNIT                 Set default unit\n"
 832                "     --system                    Run a system instance, even if PID != 1\n"
 833                "     --user                      Run a user instance\n"
 834                "     --dump-core                 Dump core on crash\n"
 835                "     --crash-shell               Run shell on crash\n"
 836                "     --confirm-spawn             Ask for confirmation when spawning processes\n"
 837                "     --show-status[=0|1]         Show status updates on the console during bootup\n"
 838 #ifdef HAVE_SYSV_COMPAT
 839                "     --sysv-console[=0|1]        Connect output of SysV scripts to console\n"
 840 #endif
 841                "     --log-target=TARGET         Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
 842                "     --log-level=LEVEL           Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
 843                "     --log-color[=0|1]           Highlight important log messages\n"
 844                "     --log-location[=0|1]        Include code location in log messages\n"
 845                "     --default-standard-output=  Set default standard output for services\n"
 846                "     --default-standard-error=   Set default standard error output for services\n",
 847                program_invocation_short_name);
 848
 849         return 0;
 850 }
 851
 852 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
 853         FILE *f = NULL;
 854         FDSet *fds = NULL;
 855         int r;
 856
 857         assert(m);
 858         assert(_f);
 859         assert(_fds);
 860
 861         if ((r = manager_open_serialization(m, &f)) < 0) {
 862                 log_error("Failed to create serialization file: %s", strerror(-r));
 863                 goto fail;
 864         }
 865
 866         if (!(fds = fdset_new())) {
 867                 r = -ENOMEM;
 868                 log_error("Failed to allocate fd set: %s", strerror(-r));
 869                 goto fail;
 870         }
 871
 872         if ((r = manager_serialize(m, f, fds)) < 0) {
 873                 log_error("Failed to serialize state: %s", strerror(-r));
 874                 goto fail;
 875         }
 876
 877         if (fseeko(f, 0, SEEK_SET) < 0) {
 878                 log_error("Failed to rewind serialization fd: %m");
 879                 goto fail;
 880         }
 881
 882         if ((r = fd_cloexec(fileno(f), false)) < 0) {
 883                 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
 884                 goto fail;
 885         }
 886
 887         if ((r = fdset_cloexec(fds, false)) < 0) {
 888                 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
 889                 goto fail;
 890         }
 891
 892         *_f = f;
 893         *_fds = fds;
 894
 895         return 0;
 896
 897 fail:
 898         fdset_free(fds);
 899
 900         if (f)
 901                 fclose(f);
 902
 903         return r;
 904 }
 905
 906 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
 907         const char *e;
 908         unsigned long long a, b;
 909
 910         assert(t);
 911
 912         if (!(e = getenv("RD_TIMESTAMP")))
 913                 return NULL;
 914
 915         if (sscanf(e, "%llu %llu", &a, &b) != 2)
 916                 return NULL;
 917
 918         t->realtime = (usec_t) a;
 919         t->monotonic = (usec_t) b;
 920
 921         return t;
 922 }
 923
 924 static void test_mtab(void) {
 925         char *p;
 926
 927         /* Check that /etc/mtab is a symlink */
 928
 929         if (readlink_malloc("/etc/mtab", &p) >= 0) {
 930                 bool b;
 931
 932                 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
 933                 free(p);
 934
 935                 if (b)
 936                         return;
 937         }
 938
 939         log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
 940                     "This is not supported anymore. "
 941                     "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
 942 }
 943
 944 static void test_usr(void) {
 945         bool separate = false;
 946
 947         /* Check that /usr is not a separate fs */
 948
 949         if (path_is_mount_point("/usr") > 0)
 950                 separate = true;
 951         /* This check won't work usually during boot, since /usr is
 952          * probably not mounted yet, hence let's add a second
 953          * check. We just check whether /usr is an empty directory. */
 954
 955         if (dir_is_empty("/usr") > 0)
 956                 separate = true;
 957
 958         if (!separate)
 959                 return;
 960
 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 Plymouth is being run make sure we show the status, so
1046          * that there's something nice to see when people press Esc */
1047         if (access("/dev/.systemd/plymouth", F_OK) >= 0)
1048                 arg_show_status = true;
1049
1050         if (arg_action == ACTION_HELP) {
1051                 retval = help();
1052                 goto finish;
1053         } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1054                 unit_dump_config_items(stdout);
1055                 retval = EXIT_SUCCESS;
1056                 goto finish;
1057         } else if (arg_action == ACTION_DONE) {
1058                 retval = EXIT_SUCCESS;
1059                 goto finish;
1060         }
1061
1062         assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1063
1064         /* Remember open file descriptors for later deserialization */
1065         if (serialization) {
1066                 if ((r = fdset_new_fill(&fds)) < 0) {
1067                         log_error("Failed to allocate fd set: %s", strerror(-r));
1068                         goto finish;
1069                 }
1070
1071                 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1072         } else
1073                 close_all_fds(NULL, 0);
1074
1075         /* Set up PATH unless it is already set */
1076         setenv("PATH",
1077                "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1078                arg_running_as == MANAGER_SYSTEM);
1079
1080         if (arg_running_as == MANAGER_SYSTEM) {
1081                 /* Parse the data passed to us by the initrd and unset it */
1082                 parse_initrd_timestamp(&initrd_timestamp);
1083                 filter_environ("RD_");
1084
1085                 /* Unset some environment variables passed in from the
1086                  * kernel that don't really make sense for us. */
1087                 unsetenv("HOME");
1088                 unsetenv("TERM");
1089         }
1090
1091         /* Move out of the way, so that we won't block unmounts */
1092         assert_se(chdir("/")  == 0);
1093
1094         if (arg_running_as == MANAGER_SYSTEM) {
1095                 /* Become a session leader if we aren't one yet. */
1096                 setsid();
1097
1098                 /* Disable the umask logic */
1099                 umask(0);
1100         }
1101
1102         /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1103         dbus_connection_set_change_sigpipe(FALSE);
1104
1105         /* Reset the console, but only if this is really init and we
1106          * are freshly booted */
1107         if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1108                 console_setup(getpid() == 1 && !serialization);
1109                 make_null_stdio();
1110         }
1111
1112         /* Open the logging devices, if possible and necessary */
1113         log_open();
1114
1115         /* Make sure we leave a core dump without panicing the
1116          * kernel. */
1117         if (getpid() == 1)
1118                 install_crash_handler();
1119
1120         log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1121                  PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1122
1123         if (arg_running_as == MANAGER_SYSTEM && !serialization) {
1124                 locale_setup();
1125
1126                 if (arg_show_status)
1127                         status_welcome();
1128
1129                 kmod_setup();
1130                 hostname_setup();
1131                 machine_id_setup();
1132                 loopback_setup();
1133
1134                 mkdir_p("/dev/.systemd/ask-password/", 0755);
1135
1136                 test_mtab();
1137                 test_usr();
1138         }
1139
1140         if ((r = manager_new(arg_running_as, &m)) < 0) {
1141                 log_error("Failed to allocate manager object: %s", strerror(-r));
1142                 goto finish;
1143         }
1144
1145         m->confirm_spawn = arg_confirm_spawn;
1146         m->show_status = arg_show_status;
1147 #ifdef HAVE_SYSV_COMPAT
1148         m->sysv_console = arg_sysv_console;
1149 #endif
1150         m->mount_auto = arg_mount_auto;
1151         m->swap_auto = arg_swap_auto;
1152         m->default_std_output = arg_default_std_output;
1153         m->default_std_error = arg_default_std_error;
1154
1155         if (dual_timestamp_is_set(&initrd_timestamp))
1156                 m->initrd_timestamp = initrd_timestamp;
1157
1158         if (arg_default_controllers)
1159                 manager_set_default_controllers(m, arg_default_controllers);
1160
1161         if ((r = manager_startup(m, serialization, fds)) < 0)
1162                 log_error("Failed to fully start up daemon: %s", strerror(-r));
1163
1164         if (fds) {
1165                 /* This will close all file descriptors that were opened, but
1166                  * not claimed by any unit. */
1167
1168                 fdset_free(fds);
1169                 fds = NULL;
1170         }
1171
1172         if (serialization) {
1173                 fclose(serialization);
1174                 serialization = NULL;
1175         } else {
1176                 DBusError error;
1177                 Unit *target = NULL;
1178
1179                 dbus_error_init(&error);
1180
1181                 log_debug("Activating default unit: %s", arg_default_unit);
1182
1183                 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1184                         log_error("Failed to load default target: %s", bus_error(&error, r));
1185                         dbus_error_free(&error);
1186                 } else if (target->meta.load_state == UNIT_ERROR)
1187                         log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
1188                 else if (target->meta.load_state == UNIT_MASKED)
1189                         log_error("Default target masked.");
1190
1191                 if (!target || target->meta.load_state != UNIT_LOADED) {
1192                         log_info("Trying to load rescue target...");
1193
1194                         if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1195                                 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1196                                 dbus_error_free(&error);
1197                                 goto finish;
1198                         } else if (target->meta.load_state == UNIT_ERROR) {
1199                                 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1200                                 goto finish;
1201                         } else if (target->meta.load_state == UNIT_MASKED) {
1202                                 log_error("Rescue target masked.");
1203                                 goto finish;
1204                         }
1205                 }
1206
1207                 assert(target->meta.load_state == UNIT_LOADED);
1208
1209                 if (arg_action == ACTION_TEST) {
1210                         printf("-> By units:\n");
1211                         manager_dump_units(m, stdout, "\t");
1212                 }
1213
1214                 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
1215                         log_error("Failed to start default target: %s", bus_error(&error, r));
1216                         dbus_error_free(&error);
1217                         goto finish;
1218                 }
1219
1220                 if (arg_action == ACTION_TEST) {
1221                         printf("-> By jobs:\n");
1222                         manager_dump_jobs(m, stdout, "\t");
1223                         retval = EXIT_SUCCESS;
1224                         goto finish;
1225                 }
1226         }
1227
1228         for (;;) {
1229                 if ((r = manager_loop(m)) < 0) {
1230                         log_error("Failed to run mainloop: %s", strerror(-r));
1231                         goto finish;
1232                 }
1233
1234                 switch (m->exit_code) {
1235
1236                 case MANAGER_EXIT:
1237                         retval = EXIT_SUCCESS;
1238                         log_debug("Exit.");
1239                         goto finish;
1240
1241                 case MANAGER_RELOAD:
1242                         log_info("Reloading.");
1243                         if ((r = manager_reload(m)) < 0)
1244                                 log_error("Failed to reload: %s", strerror(-r));
1245                         break;
1246
1247                 case MANAGER_REEXECUTE:
1248                         if (prepare_reexecute(m, &serialization, &fds) < 0)
1249                                 goto finish;
1250
1251                         reexecute = true;
1252                         log_notice("Reexecuting.");
1253                         goto finish;
1254
1255                 case MANAGER_REBOOT:
1256                 case MANAGER_POWEROFF:
1257                 case MANAGER_HALT:
1258                 case MANAGER_KEXEC: {
1259                         static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1260                                 [MANAGER_REBOOT] = "reboot",
1261                                 [MANAGER_POWEROFF] = "poweroff",
1262                                 [MANAGER_HALT] = "halt",
1263                                 [MANAGER_KEXEC] = "kexec"
1264                         };
1265
1266                         assert_se(shutdown_verb = table[m->exit_code]);
1267
1268                         log_notice("Shutting down.");
1269                         goto finish;
1270                 }
1271
1272                 default:
1273                         assert_not_reached("Unknown exit code.");
1274                 }
1275         }
1276
1277 finish:
1278         if (m)
1279                 manager_free(m);
1280
1281         free(arg_default_unit);
1282         strv_free(arg_default_controllers);
1283
1284         dbus_shutdown();
1285
1286         label_finish();
1287
1288         if (reexecute) {
1289                 const char *args[15];
1290                 unsigned i = 0;
1291                 char sfd[16];
1292
1293                 assert(serialization);
1294                 assert(fds);
1295
1296                 args[i++] = SYSTEMD_BINARY_PATH;
1297
1298                 args[i++] = "--log-level";
1299                 args[i++] = log_level_to_string(log_get_max_level());
1300
1301                 args[i++] = "--log-target";
1302                 args[i++] = log_target_to_string(log_get_target());
1303
1304                 if (arg_running_as == MANAGER_SYSTEM)
1305                         args[i++] = "--system";
1306                 else
1307                         args[i++] = "--user";
1308
1309                 if (arg_dump_core)
1310                         args[i++] = "--dump-core";
1311
1312                 if (arg_crash_shell)
1313                         args[i++] = "--crash-shell";
1314
1315                 if (arg_confirm_spawn)
1316                         args[i++] = "--confirm-spawn";
1317
1318                 if (arg_show_status)
1319                         args[i++] = "--show-status=1";
1320                 else
1321                         args[i++] = "--show-status=0";
1322
1323 #ifdef HAVE_SYSV_COMPAT
1324                 if (arg_sysv_console)
1325                         args[i++] = "--sysv-console=1";
1326                 else
1327                         args[i++] = "--sysv-console=0";
1328 #endif
1329
1330                 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1331                 char_array_0(sfd);
1332
1333                 args[i++] = "--deserialize";
1334                 args[i++] = sfd;
1335
1336                 args[i++] = NULL;
1337
1338                 assert(i <= ELEMENTSOF(args));
1339
1340                 execv(args[0], (char* const*) args);
1341
1342                 log_error("Failed to reexecute: %m");
1343         }
1344
1345         if (serialization)
1346                 fclose(serialization);
1347
1348         if (fds)
1349                 fdset_free(fds);
1350
1351         if (shutdown_verb) {
1352                 const char * command_line[] = {
1353                         SYSTEMD_SHUTDOWN_BINARY_PATH,
1354                         shutdown_verb,
1355                         NULL
1356                 };
1357
1358                 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1359                 log_error("Failed to execute shutdown binary, freezing: %m");
1360         }
1361
1362         if (getpid() == 1)
1363                 freeze();
1364
1365         return retval;
1366 }