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         /* Don't read /proc/cmdline if we are in a container, since
 550          * that is only relevant for the host system */
 551         if (detect_container(NULL) > 0)
 552                 return 0;
 553
 554         if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
 555                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
 556                 return 0;
 557         }
 558
 559         FOREACH_WORD_QUOTED(w, l, line, state) {
 560                 char *word;
 561
 562                 if (!(word = strndup(w, l))) {
 563                         r = -ENOMEM;
 564                         goto finish;
 565                 }
 566
 567                 r = parse_proc_cmdline_word(word);
 568                 free(word);
 569
 570                 if (r < 0)
 571                         goto finish;
 572         }
 573
 574         r = 0;
 575
 576 finish:
 577         free(line);
 578         return r;
 579 }
 580
 581 static int parse_argv(int argc, char *argv[]) {
 582
 583         enum {
 584                 ARG_LOG_LEVEL = 0x100,
 585                 ARG_LOG_TARGET,
 586                 ARG_LOG_COLOR,
 587                 ARG_LOG_LOCATION,
 588                 ARG_UNIT,
 589                 ARG_SYSTEM,
 590                 ARG_USER,
 591                 ARG_TEST,
 592                 ARG_DUMP_CONFIGURATION_ITEMS,
 593                 ARG_DUMP_CORE,
 594                 ARG_CRASH_SHELL,
 595                 ARG_CONFIRM_SPAWN,
 596                 ARG_SHOW_STATUS,
 597                 ARG_SYSV_CONSOLE,
 598                 ARG_DESERIALIZE,
 599                 ARG_INTROSPECT,
 600                 ARG_DEFAULT_STD_OUTPUT,
 601                 ARG_DEFAULT_STD_ERROR
 602         };
 603
 604         static const struct option options[] = {
 605                 { "log-level",                required_argument, NULL, ARG_LOG_LEVEL                },
 606                 { "log-target",               required_argument, NULL, ARG_LOG_TARGET               },
 607                 { "log-color",                optional_argument, NULL, ARG_LOG_COLOR                },
 608                 { "log-location",             optional_argument, NULL, ARG_LOG_LOCATION             },
 609                 { "unit",                     required_argument, NULL, ARG_UNIT                     },
 610                 { "system",                   no_argument,       NULL, ARG_SYSTEM                   },
 611                 { "user",                     no_argument,       NULL, ARG_USER                     },
 612                 { "test",                     no_argument,       NULL, ARG_TEST                     },
 613                 { "help",                     no_argument,       NULL, 'h'                          },
 614                 { "dump-configuration-items", no_argument,       NULL, ARG_DUMP_CONFIGURATION_ITEMS },
 615                 { "dump-core",                no_argument,       NULL, ARG_DUMP_CORE                },
 616                 { "crash-shell",              no_argument,       NULL, ARG_CRASH_SHELL              },
 617                 { "confirm-spawn",            no_argument,       NULL, ARG_CONFIRM_SPAWN            },
 618                 { "show-status",              optional_argument, NULL, ARG_SHOW_STATUS              },
 619 #ifdef HAVE_SYSV_COMPAT
 620                 { "sysv-console",             optional_argument, NULL, ARG_SYSV_CONSOLE             },
 621 #endif
 622                 { "deserialize",              required_argument, NULL, ARG_DESERIALIZE              },
 623                 { "introspect",               optional_argument, NULL, ARG_INTROSPECT               },
 624                 { "default-standard-output",  required_argument, NULL, ARG_DEFAULT_STD_OUTPUT,      },
 625                 { "default-standard-error",   required_argument, NULL, ARG_DEFAULT_STD_ERROR,       },
 626                 { NULL,                       0,                 NULL, 0                            }
 627         };
 628
 629         int c, r;
 630
 631         assert(argc >= 1);
 632         assert(argv);
 633
 634         if (getpid() == 1)
 635                 opterr = 0;
 636
 637         while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
 638
 639                 switch (c) {
 640
 641                 case ARG_LOG_LEVEL:
 642                         if ((r = log_set_max_level_from_string(optarg)) < 0) {
 643                                 log_error("Failed to parse log level %s.", optarg);
 644                                 return r;
 645                         }
 646
 647                         break;
 648
 649                 case ARG_LOG_TARGET:
 650
 651                         if ((r = log_set_target_from_string(optarg)) < 0) {
 652                                 log_error("Failed to parse log target %s.", optarg);
 653                                 return r;
 654                         }
 655
 656                         break;
 657
 658                 case ARG_LOG_COLOR:
 659
 660                         if (optarg) {
 661                                 if ((r = log_show_color_from_string(optarg)) < 0) {
 662                                         log_error("Failed to parse log color setting %s.", optarg);
 663                                         return r;
 664                                 }
 665                         } else
 666                                 log_show_color(true);
 667
 668                         break;
 669
 670                 case ARG_LOG_LOCATION:
 671
 672                         if (optarg) {
 673                                 if ((r = log_show_location_from_string(optarg)) < 0) {
 674                                         log_error("Failed to parse log location setting %s.", optarg);
 675                                         return r;
 676                                 }
 677                         } else
 678                                 log_show_location(true);
 679
 680                         break;
 681
 682                 case ARG_DEFAULT_STD_OUTPUT:
 683
 684                         if ((r = exec_output_from_string(optarg)) < 0) {
 685                                 log_error("Failed to parse default standard output setting %s.", optarg);
 686                                 return r;
 687                         } else
 688                                 arg_default_std_output = r;
 689                         break;
 690
 691                 case ARG_DEFAULT_STD_ERROR:
 692
 693                         if ((r = exec_output_from_string(optarg)) < 0) {
 694                                 log_error("Failed to parse default standard error output setting %s.", optarg);
 695                                 return r;
 696                         } else
 697                                 arg_default_std_error = r;
 698                         break;
 699
 700                 case ARG_UNIT:
 701
 702                         if ((r = set_default_unit(optarg)) < 0) {
 703                                 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
 704                                 return r;
 705                         }
 706
 707                         break;
 708
 709                 case ARG_SYSTEM:
 710                         arg_running_as = MANAGER_SYSTEM;
 711                         break;
 712
 713                 case ARG_USER:
 714                         arg_running_as = MANAGER_USER;
 715                         break;
 716
 717                 case ARG_TEST:
 718                         arg_action = ACTION_TEST;
 719                         break;
 720
 721                 case ARG_DUMP_CONFIGURATION_ITEMS:
 722                         arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
 723                         break;
 724
 725                 case ARG_DUMP_CORE:
 726                         arg_dump_core = true;
 727                         break;
 728
 729                 case ARG_CRASH_SHELL:
 730                         arg_crash_shell = true;
 731                         break;
 732
 733                 case ARG_CONFIRM_SPAWN:
 734                         arg_confirm_spawn = true;
 735                         break;
 736
 737                 case ARG_SHOW_STATUS:
 738
 739                         if (optarg) {
 740                                 if ((r = parse_boolean(optarg)) < 0) {
 741                                         log_error("Failed to show status boolean %s.", optarg);
 742                                         return r;
 743                                 }
 744                                 arg_show_status = r;
 745                         } else
 746                                 arg_show_status = true;
 747                         break;
 748 #ifdef HAVE_SYSV_COMPAT
 749                 case ARG_SYSV_CONSOLE:
 750
 751                         if (optarg) {
 752                                 if ((r = parse_boolean(optarg)) < 0) {
 753                                         log_error("Failed to SysV console boolean %s.", optarg);
 754                                         return r;
 755                                 }
 756                                 arg_sysv_console = r;
 757                         } else
 758                                 arg_sysv_console = true;
 759                         break;
 760 #endif
 761
 762                 case ARG_DESERIALIZE: {
 763                         int fd;
 764                         FILE *f;
 765
 766                         if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
 767                                 log_error("Failed to parse deserialize option %s.", optarg);
 768                                 return r;
 769                         }
 770
 771                         if (!(f = fdopen(fd, "r"))) {
 772                                 log_error("Failed to open serialization fd: %m");
 773                                 return r;
 774                         }
 775
 776                         if (serialization)
 777                                 fclose(serialization);
 778
 779                         serialization = f;
 780
 781                         break;
 782                 }
 783
 784                 case ARG_INTROSPECT: {
 785                         const char * const * i = NULL;
 786
 787                         for (i = bus_interface_table; *i; i += 2)
 788                                 if (!optarg || streq(i[0], optarg)) {
 789                                         fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
 790                                               "<node>\n", stdout);
 791                                         fputs(i[1], stdout);
 792                                         fputs("</node>\n", stdout);
 793
 794                                         if (optarg)
 795                                                 break;
 796                                 }
 797
 798                         if (!i[0] && optarg)
 799                                 log_error("Unknown interface %s.", optarg);
 800
 801                         arg_action = ACTION_DONE;
 802                         break;
 803                 }
 804
 805                 case 'h':
 806                         arg_action = ACTION_HELP;
 807                         break;
 808
 809                 case 'D':
 810                         log_set_max_level(LOG_DEBUG);
 811                         break;
 812
 813                 case 'b':
 814                 case 's':
 815                 case 'z':
 816                         /* Just to eat away the sysvinit kernel
 817                          * cmdline args without getopt() error
 818                          * messages that we'll parse in
 819                          * parse_proc_cmdline_word() or ignore. */
 820
 821                 case '?':
 822                 default:
 823                         if (getpid() != 1) {
 824                                 log_error("Unknown option code %c", c);
 825                                 return -EINVAL;
 826                         }
 827
 828                         break;
 829                 }
 830
 831         if (optind < argc) {
 832                 if (getpid() != 1) {
 833                         /* Hmm, when we aren't run as init system
 834                          * let's complain about excess arguments */
 835
 836                         log_error("Excess arguments.");
 837                         return -EINVAL;
 838
 839                 } else if (detect_container(NULL) > 0) {
 840                         char **a;
 841
 842                         /* All /proc/cmdline arguments the kernel
 843                          * didn't understand it passed to us. We're
 844                          * note really interested in that usually
 845                          * since /proc/cmdline is more interesting and
 846                          * complete. With one exception: if we are run
 847                          * in a container /proc/cmdline is not
 848                          * relevant for us, hence we rely on argv[]
 849                          * instead. */
 850
 851                         for (a = argv + optind; a < argv + argc; a++)
 852                                 if ((r = parse_proc_cmdline_word(*a)) < 0)
 853                                         return r;
 854                 }
 855         }
 856
 857         return 0;
 858 }
 859
 860 static int help(void) {
 861
 862         printf("%s [OPTIONS...]\n\n"
 863                "Starts up and maintains the system or user services.\n\n"
 864                "  -h --help                      Show this help\n"
 865                "     --test                      Determine startup sequence, dump it and exit\n"
 866                "     --dump-configuration-items  Dump understood unit configuration items\n"
 867                "     --introspect[=INTERFACE]    Extract D-Bus interface data\n"
 868                "     --unit=UNIT                 Set default unit\n"
 869                "     --system                    Run a system instance, even if PID != 1\n"
 870                "     --user                      Run a user instance\n"
 871                "     --dump-core                 Dump core on crash\n"
 872                "     --crash-shell               Run shell on crash\n"
 873                "     --confirm-spawn             Ask for confirmation when spawning processes\n"
 874                "     --show-status[=0|1]         Show status updates on the console during bootup\n"
 875 #ifdef HAVE_SYSV_COMPAT
 876                "     --sysv-console[=0|1]        Connect output of SysV scripts to console\n"
 877 #endif
 878                "     --log-target=TARGET         Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
 879                "     --log-level=LEVEL           Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
 880                "     --log-color[=0|1]           Highlight important log messages\n"
 881                "     --log-location[=0|1]        Include code location in log messages\n"
 882                "     --default-standard-output=  Set default standard output for services\n"
 883                "     --default-standard-error=   Set default standard error output for services\n",
 884                program_invocation_short_name);
 885
 886         return 0;
 887 }
 888
 889 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
 890         FILE *f = NULL;
 891         FDSet *fds = NULL;
 892         int r;
 893
 894         assert(m);
 895         assert(_f);
 896         assert(_fds);
 897
 898         if ((r = manager_open_serialization(m, &f)) < 0) {
 899                 log_error("Failed to create serialization file: %s", strerror(-r));
 900                 goto fail;
 901         }
 902
 903         if (!(fds = fdset_new())) {
 904                 r = -ENOMEM;
 905                 log_error("Failed to allocate fd set: %s", strerror(-r));
 906                 goto fail;
 907         }
 908
 909         if ((r = manager_serialize(m, f, fds)) < 0) {
 910                 log_error("Failed to serialize state: %s", strerror(-r));
 911                 goto fail;
 912         }
 913
 914         if (fseeko(f, 0, SEEK_SET) < 0) {
 915                 log_error("Failed to rewind serialization fd: %m");
 916                 goto fail;
 917         }
 918
 919         if ((r = fd_cloexec(fileno(f), false)) < 0) {
 920                 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
 921                 goto fail;
 922         }
 923
 924         if ((r = fdset_cloexec(fds, false)) < 0) {
 925                 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
 926                 goto fail;
 927         }
 928
 929         *_f = f;
 930         *_fds = fds;
 931
 932         return 0;
 933
 934 fail:
 935         fdset_free(fds);
 936
 937         if (f)
 938                 fclose(f);
 939
 940         return r;
 941 }
 942
 943 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
 944         const char *e;
 945         unsigned long long a, b;
 946
 947         assert(t);
 948
 949         if (!(e = getenv("RD_TIMESTAMP")))
 950                 return NULL;
 951
 952         if (sscanf(e, "%llu %llu", &a, &b) != 2)
 953                 return NULL;
 954
 955         t->realtime = (usec_t) a;
 956         t->monotonic = (usec_t) b;
 957
 958         return t;
 959 }
 960
 961 static void test_mtab(void) {
 962         char *p;
 963
 964         /* Check that /etc/mtab is a symlink */
 965
 966         if (readlink_malloc("/etc/mtab", &p) >= 0) {
 967                 bool b;
 968
 969                 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
 970                 free(p);
 971
 972                 if (b)
 973                         return;
 974         }
 975
 976         log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
 977                     "This is not supported anymore. "
 978                     "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
 979 }
 980
 981 static void test_usr(void) {
 982
 983         /* Check that /usr is not a separate fs */
 984
 985         if (dir_is_empty("/usr") > 0)
 986                 log_warning("/usr appears to be on a different file system than /. This is not supported anymore. "
 987                             "Some things will probably break (sometimes even silently) in mysterious ways. "
 988                             "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
 989 }
 990
 991 int main(int argc, char *argv[]) {
 992         Manager *m = NULL;
 993         int r, retval = EXIT_FAILURE;
 994         FDSet *fds = NULL;
 995         bool reexecute = false;
 996         const char *shutdown_verb = NULL;
 997         dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
 998         char systemd[] = "systemd";
 999
1000         if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1001                 /* This is compatibility support for SysV, where
1002                  * calling init as a user is identical to telinit. */
1003
1004                 errno = -ENOENT;
1005                 execv(SYSTEMCTL_BINARY_PATH, argv);
1006                 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1007                 return 1;
1008         }
1009
1010         /* If we get started via the /sbin/init symlink then we are
1011            called 'init'. After a subsequent reexecution we are then
1012            called 'systemd'. That is confusing, hence let's call us
1013            systemd right-away. */
1014
1015         program_invocation_short_name = systemd;
1016         prctl(PR_SET_NAME, systemd);
1017
1018         log_show_color(isatty(STDERR_FILENO) > 0);
1019         log_show_location(false);
1020         log_set_max_level(LOG_INFO);
1021
1022         if (getpid() == 1) {
1023                 arg_running_as = MANAGER_SYSTEM;
1024                 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1025
1026                 /* This might actually not return, but cause a
1027                  * reexecution */
1028                 if (selinux_setup(argv) < 0)
1029                         goto finish;
1030
1031                 if (label_init() < 0)
1032                         goto finish;
1033         } else {
1034                 arg_running_as = MANAGER_USER;
1035                 log_set_target(LOG_TARGET_CONSOLE);
1036         }
1037
1038         if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1039                 goto finish;
1040
1041         /* Mount /proc, /sys and friends, so that /proc/cmdline and
1042          * /proc/$PID/fd is available. */
1043         if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS"))
1044                 if (mount_setup() < 0)
1045                         goto finish;
1046
1047         /* Reset all signal handlers. */
1048         assert_se(reset_all_signal_handlers() == 0);
1049
1050         /* If we are init, we can block sigkill. Yay. */
1051         ignore_signals(SIGNALS_IGNORE, -1);
1052
1053         if (parse_config_file() < 0)
1054                 goto finish;
1055
1056         if (arg_running_as == MANAGER_SYSTEM)
1057                 if (parse_proc_cmdline() < 0)
1058                         goto finish;
1059
1060         log_parse_environment();
1061
1062         if (parse_argv(argc, argv) < 0)
1063                 goto finish;
1064
1065         if (arg_action == ACTION_TEST && geteuid() == 0) {
1066                 log_error("Don't run test mode as root.");
1067                 goto finish;
1068         }
1069
1070         if (arg_running_as == MANAGER_SYSTEM &&
1071             arg_action == ACTION_RUN &&
1072             running_in_chroot() > 0) {
1073                 log_error("Cannot be run in a chroot() environment.");
1074                 goto finish;
1075         }
1076
1077         /* If Plymouth is being run make sure we show the status, so
1078          * that there's something nice to see when people press Esc */
1079         if (access("/dev/.run/initramfs/plymouth", F_OK) >= 0)
1080                 arg_show_status = true;
1081
1082         if (arg_action == ACTION_HELP) {
1083                 retval = help();
1084                 goto finish;
1085         } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1086                 unit_dump_config_items(stdout);
1087                 retval = EXIT_SUCCESS;
1088                 goto finish;
1089         } else if (arg_action == ACTION_DONE) {
1090                 retval = EXIT_SUCCESS;
1091                 goto finish;
1092         }
1093
1094         assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1095
1096         /* Remember open file descriptors for later deserialization */
1097         if (serialization) {
1098                 if ((r = fdset_new_fill(&fds)) < 0) {
1099                         log_error("Failed to allocate fd set: %s", strerror(-r));
1100                         goto finish;
1101                 }
1102
1103                 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1104         } else
1105                 close_all_fds(NULL, 0);
1106
1107         /* Set up PATH unless it is already set */
1108         setenv("PATH",
1109                "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1110                arg_running_as == MANAGER_SYSTEM);
1111
1112         if (arg_running_as == MANAGER_SYSTEM) {
1113                 /* Parse the data passed to us by the initrd and unset it */
1114                 parse_initrd_timestamp(&initrd_timestamp);
1115                 filter_environ("RD_");
1116
1117                 /* Unset some environment variables passed in from the
1118                  * kernel that don't really make sense for us. */
1119                 unsetenv("HOME");
1120                 unsetenv("TERM");
1121
1122                 /* All other variables are left as is, so that clients
1123                  * can still read them via /proc/1/environ */
1124         }
1125
1126         /* Move out of the way, so that we won't block unmounts */
1127         assert_se(chdir("/")  == 0);
1128
1129         if (arg_running_as == MANAGER_SYSTEM) {
1130                 /* Become a session leader if we aren't one yet. */
1131                 setsid();
1132
1133                 /* Disable the umask logic */
1134                 umask(0);
1135         }
1136
1137         /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1138         dbus_connection_set_change_sigpipe(FALSE);
1139
1140         /* Reset the console, but only if this is really init and we
1141          * are freshly booted */
1142         if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1143                 console_setup(getpid() == 1 && !serialization);
1144                 make_null_stdio();
1145         }
1146
1147         /* Open the logging devices, if possible and necessary */
1148         log_open();
1149
1150         /* Make sure we leave a core dump without panicing the
1151          * kernel. */
1152         if (getpid() == 1)
1153                 install_crash_handler();
1154
1155         log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1156                  PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1157
1158         if (arg_running_as == MANAGER_SYSTEM && !serialization) {
1159                 locale_setup();
1160
1161                 if (arg_show_status)
1162                         status_welcome();
1163
1164                 kmod_setup();
1165                 hostname_setup();
1166                 machine_id_setup();
1167                 loopback_setup();
1168
1169                 test_mtab();
1170                 test_usr();
1171         }
1172
1173         if ((r = manager_new(arg_running_as, &m)) < 0) {
1174                 log_error("Failed to allocate manager object: %s", strerror(-r));
1175                 goto finish;
1176         }
1177
1178         m->confirm_spawn = arg_confirm_spawn;
1179         m->show_status = arg_show_status;
1180 #ifdef HAVE_SYSV_COMPAT
1181         m->sysv_console = arg_sysv_console;
1182 #endif
1183         m->mount_auto = arg_mount_auto;
1184         m->swap_auto = arg_swap_auto;
1185         m->default_std_output = arg_default_std_output;
1186         m->default_std_error = arg_default_std_error;
1187
1188         if (dual_timestamp_is_set(&initrd_timestamp))
1189                 m->initrd_timestamp = initrd_timestamp;
1190
1191         if (arg_default_controllers)
1192                 manager_set_default_controllers(m, arg_default_controllers);
1193
1194         if ((r = manager_startup(m, serialization, fds)) < 0)
1195                 log_error("Failed to fully start up daemon: %s", strerror(-r));
1196
1197         if (fds) {
1198                 /* This will close all file descriptors that were opened, but
1199                  * not claimed by any unit. */
1200
1201                 fdset_free(fds);
1202                 fds = NULL;
1203         }
1204
1205         if (serialization) {
1206                 fclose(serialization);
1207                 serialization = NULL;
1208         } else {
1209                 DBusError error;
1210                 Unit *target = NULL;
1211
1212                 dbus_error_init(&error);
1213
1214                 log_debug("Activating default unit: %s", arg_default_unit);
1215
1216                 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1217                         log_error("Failed to load default target: %s", bus_error(&error, r));
1218                         dbus_error_free(&error);
1219                 } else if (target->meta.load_state == UNIT_ERROR)
1220                         log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
1221                 else if (target->meta.load_state == UNIT_MASKED)
1222                         log_error("Default target masked.");
1223
1224                 if (!target || target->meta.load_state != UNIT_LOADED) {
1225                         log_info("Trying to load rescue target...");
1226
1227                         if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1228                                 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1229                                 dbus_error_free(&error);
1230                                 goto finish;
1231                         } else if (target->meta.load_state == UNIT_ERROR) {
1232                                 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1233                                 goto finish;
1234                         } else if (target->meta.load_state == UNIT_MASKED) {
1235                                 log_error("Rescue target masked.");
1236                                 goto finish;
1237                         }
1238                 }
1239
1240                 assert(target->meta.load_state == UNIT_LOADED);
1241
1242                 if (arg_action == ACTION_TEST) {
1243                         printf("-> By units:\n");
1244                         manager_dump_units(m, stdout, "\t");
1245                 }
1246
1247                 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
1248                         log_error("Failed to start default target: %s", bus_error(&error, r));
1249                         dbus_error_free(&error);
1250                         goto finish;
1251                 }
1252
1253                 if (arg_action == ACTION_TEST) {
1254                         printf("-> By jobs:\n");
1255                         manager_dump_jobs(m, stdout, "\t");
1256                         retval = EXIT_SUCCESS;
1257                         goto finish;
1258                 }
1259         }
1260
1261         for (;;) {
1262                 if ((r = manager_loop(m)) < 0) {
1263                         log_error("Failed to run mainloop: %s", strerror(-r));
1264                         goto finish;
1265                 }
1266
1267                 switch (m->exit_code) {
1268
1269                 case MANAGER_EXIT:
1270                         retval = EXIT_SUCCESS;
1271                         log_debug("Exit.");
1272                         goto finish;
1273
1274                 case MANAGER_RELOAD:
1275                         log_info("Reloading.");
1276                         if ((r = manager_reload(m)) < 0)
1277                                 log_error("Failed to reload: %s", strerror(-r));
1278                         break;
1279
1280                 case MANAGER_REEXECUTE:
1281                         if (prepare_reexecute(m, &serialization, &fds) < 0)
1282                                 goto finish;
1283
1284                         reexecute = true;
1285                         log_notice("Reexecuting.");
1286                         goto finish;
1287
1288                 case MANAGER_REBOOT:
1289                 case MANAGER_POWEROFF:
1290                 case MANAGER_HALT:
1291                 case MANAGER_KEXEC: {
1292                         static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1293                                 [MANAGER_REBOOT] = "reboot",
1294                                 [MANAGER_POWEROFF] = "poweroff",
1295                                 [MANAGER_HALT] = "halt",
1296                                 [MANAGER_KEXEC] = "kexec"
1297                         };
1298
1299                         assert_se(shutdown_verb = table[m->exit_code]);
1300
1301                         log_notice("Shutting down.");
1302                         goto finish;
1303                 }
1304
1305                 default:
1306                         assert_not_reached("Unknown exit code.");
1307                 }
1308         }
1309
1310 finish:
1311         if (m)
1312                 manager_free(m);
1313
1314         free(arg_default_unit);
1315         strv_free(arg_default_controllers);
1316
1317         dbus_shutdown();
1318
1319         label_finish();
1320
1321         if (reexecute) {
1322                 const char *args[15];
1323                 unsigned i = 0;
1324                 char sfd[16];
1325
1326                 assert(serialization);
1327                 assert(fds);
1328
1329                 args[i++] = SYSTEMD_BINARY_PATH;
1330
1331                 args[i++] = "--log-level";
1332                 args[i++] = log_level_to_string(log_get_max_level());
1333
1334                 args[i++] = "--log-target";
1335                 args[i++] = log_target_to_string(log_get_target());
1336
1337                 if (arg_running_as == MANAGER_SYSTEM)
1338                         args[i++] = "--system";
1339                 else
1340                         args[i++] = "--user";
1341
1342                 if (arg_dump_core)
1343                         args[i++] = "--dump-core";
1344
1345                 if (arg_crash_shell)
1346                         args[i++] = "--crash-shell";
1347
1348                 if (arg_confirm_spawn)
1349                         args[i++] = "--confirm-spawn";
1350
1351                 if (arg_show_status)
1352                         args[i++] = "--show-status=1";
1353                 else
1354                         args[i++] = "--show-status=0";
1355
1356 #ifdef HAVE_SYSV_COMPAT
1357                 if (arg_sysv_console)
1358                         args[i++] = "--sysv-console=1";
1359                 else
1360                         args[i++] = "--sysv-console=0";
1361 #endif
1362
1363                 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1364                 char_array_0(sfd);
1365
1366                 args[i++] = "--deserialize";
1367                 args[i++] = sfd;
1368
1369                 args[i++] = NULL;
1370
1371                 assert(i <= ELEMENTSOF(args));
1372
1373                 execv(args[0], (char* const*) args);
1374
1375                 log_error("Failed to reexecute: %m");
1376         }
1377
1378         if (serialization)
1379                 fclose(serialization);
1380
1381         if (fds)
1382                 fdset_free(fds);
1383
1384         if (shutdown_verb) {
1385                 const char * command_line[] = {
1386                         SYSTEMD_SHUTDOWN_BINARY_PATH,
1387                         shutdown_verb,
1388                         NULL
1389                 };
1390
1391                 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1392                 log_error("Failed to execute shutdown binary, freezing: %m");
1393         }
1394
1395         if (getpid() == 1)
1396                 freeze();
1397
1398         return retval;
1399 }