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 #include "def.h"
  55
  56 static enum {
  57         ACTION_RUN,
  58         ACTION_HELP,
  59         ACTION_TEST,
  60         ACTION_DUMP_CONFIGURATION_ITEMS,
  61         ACTION_DONE
  62 } arg_action = ACTION_RUN;
  63
  64 static char *arg_default_unit = NULL;
  65 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
  66
  67 static bool arg_dump_core = true;
  68 static bool arg_crash_shell = false;
  69 static int arg_crash_chvt = -1;
  70 static bool arg_confirm_spawn = false;
  71 static bool arg_show_status = true;
  72 #ifdef HAVE_SYSV_COMPAT
  73 static bool arg_sysv_console = true;
  74 #endif
  75 static bool arg_mount_auto = true;
  76 static bool arg_swap_auto = true;
  77 static char **arg_default_controllers = NULL;
  78 static ExecOutput arg_default_std_output = EXEC_OUTPUT_INHERIT;
  79 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
  80
  81 static FILE* serialization = NULL;
  82
  83 static void nop_handler(int sig) {
  84 }
  85
  86 _noreturn_ static void crash(int sig) {
  87
  88         if (!arg_dump_core)
  89                 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
  90         else {
  91                 struct sigaction sa;
  92                 pid_t pid;
  93
  94                 /* We want to wait for the core process, hence let's enable SIGCHLD */
  95                 zero(sa);
  96                 sa.sa_handler = nop_handler;
  97                 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
  98                 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
  99
 100                 if ((pid = fork()) < 0)
 101                         log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
 102
 103                 else if (pid == 0) {
 104                         struct rlimit rl;
 105
 106                         /* Enable default signal handler for core dump */
 107                         zero(sa);
 108                         sa.sa_handler = SIG_DFL;
 109                         assert_se(sigaction(sig, &sa, NULL) == 0);
 110
 111                         /* Don't limit the core dump size */
 112                         zero(rl);
 113                         rl.rlim_cur = RLIM_INFINITY;
 114                         rl.rlim_max = RLIM_INFINITY;
 115                         setrlimit(RLIMIT_CORE, &rl);
 116
 117                         /* Just to be sure... */
 118                         assert_se(chdir("/") == 0);
 119
 120                         /* Raise the signal again */
 121                         raise(sig);
 122
 123                         assert_not_reached("We shouldn't be here...");
 124                         _exit(1);
 125
 126                 } else {
 127                         siginfo_t status;
 128                         int r;
 129
 130                         /* Order things nicely. */
 131                         if ((r = wait_for_terminate(pid, &status)) < 0)
 132                                 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
 133                         else if (status.si_code != CLD_DUMPED)
 134                                 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
 135                         else
 136                                 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
 137                 }
 138         }
 139
 140         if (arg_crash_chvt)
 141                 chvt(arg_crash_chvt);
 142
 143         if (arg_crash_shell) {
 144                 struct sigaction sa;
 145                 pid_t pid;
 146
 147                 log_info("Executing crash shell in 10s...");
 148                 sleep(10);
 149
 150                 /* Let the kernel reap children for us */
 151                 zero(sa);
 152                 sa.sa_handler = SIG_IGN;
 153                 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
 154                 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
 155
 156                 if ((pid = fork()) < 0)
 157                         log_error("Failed to fork off crash shell: %s", strerror(errno));
 158                 else if (pid == 0) {
 159                         int fd, r;
 160
 161                         if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
 162                                 log_error("Failed to acquire terminal: %s", strerror(-fd));
 163                         else if ((r = make_stdio(fd)) < 0)
 164                                 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
 165
 166                         execl("/bin/sh", "/bin/sh", NULL);
 167
 168                         log_error("execl() failed: %s", strerror(errno));
 169                         _exit(1);
 170                 }
 171
 172                 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
 173         }
 174
 175         log_info("Freezing execution.");
 176         freeze();
 177 }
 178
 179 static void install_crash_handler(void) {
 180         struct sigaction sa;
 181
 182         zero(sa);
 183
 184         sa.sa_handler = crash;
 185         sa.sa_flags = SA_NODEFER;
 186
 187         sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
 188 }
 189
 190 static int console_setup(bool do_reset) {
 191         int tty_fd, r;
 192
 193         /* If we are init, we connect stdin/stdout/stderr to /dev/null
 194          * and make sure we don't have a controlling tty. */
 195
 196         release_terminal();
 197
 198         if (!do_reset)
 199                 return 0;
 200
 201         if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
 202                 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
 203                 return -tty_fd;
 204         }
 205
 206         if ((r = reset_terminal_fd(tty_fd)) < 0)
 207                 log_error("Failed to reset /dev/console: %s", strerror(-r));
 208
 209         close_nointr_nofail(tty_fd);
 210         return r;
 211 }
 212
 213 static int set_default_unit(const char *u) {
 214         char *c;
 215
 216         assert(u);
 217
 218         if (!(c = strdup(u)))
 219                 return -ENOMEM;
 220
 221         free(arg_default_unit);
 222         arg_default_unit = c;
 223         return 0;
 224 }
 225
 226 static int parse_proc_cmdline_word(const char *word) {
 227
 228         static const char * const rlmap[] = {
 229                 "emergency", 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_level2(
 372                 const char *filename,
 373                 unsigned line,
 374                 const char *section,
 375                 const char *lvalue,
 376                 int ltype,
 377                 const char *rvalue,
 378                 void *data,
 379                 void *userdata) {
 380
 381         assert(filename);
 382         assert(lvalue);
 383         assert(rvalue);
 384
 385         log_set_max_level_from_string(rvalue);
 386         return 0;
 387 }
 388
 389 static int config_parse_target(
 390                 const char *filename,
 391                 unsigned line,
 392                 const char *section,
 393                 const char *lvalue,
 394                 int ltype,
 395                 const char *rvalue,
 396                 void *data,
 397                 void *userdata) {
 398
 399         assert(filename);
 400         assert(lvalue);
 401         assert(rvalue);
 402
 403         log_set_target_from_string(rvalue);
 404         return 0;
 405 }
 406
 407 static int config_parse_color(
 408                 const char *filename,
 409                 unsigned line,
 410                 const char *section,
 411                 const char *lvalue,
 412                 int ltype,
 413                 const char *rvalue,
 414                 void *data,
 415                 void *userdata) {
 416
 417         assert(filename);
 418         assert(lvalue);
 419         assert(rvalue);
 420
 421         log_show_color_from_string(rvalue);
 422         return 0;
 423 }
 424
 425 static int config_parse_location(
 426                 const char *filename,
 427                 unsigned line,
 428                 const char *section,
 429                 const char *lvalue,
 430                 int ltype,
 431                 const char *rvalue,
 432                 void *data,
 433                 void *userdata) {
 434
 435         assert(filename);
 436         assert(lvalue);
 437         assert(rvalue);
 438
 439         log_show_location_from_string(rvalue);
 440         return 0;
 441 }
 442
 443 static int config_parse_cpu_affinity2(
 444                 const char *filename,
 445                 unsigned line,
 446                 const char *section,
 447                 const char *lvalue,
 448                 int ltype,
 449                 const char *rvalue,
 450                 void *data,
 451                 void *userdata) {
 452
 453         char *w;
 454         size_t l;
 455         char *state;
 456         cpu_set_t *c = NULL;
 457         unsigned ncpus = 0;
 458
 459         assert(filename);
 460         assert(lvalue);
 461         assert(rvalue);
 462
 463         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 464                 char *t;
 465                 int r;
 466                 unsigned cpu;
 467
 468                 if (!(t = strndup(w, l)))
 469                         return -ENOMEM;
 470
 471                 r = safe_atou(t, &cpu);
 472                 free(t);
 473
 474                 if (!c)
 475                         if (!(c = cpu_set_malloc(&ncpus)))
 476                                 return -ENOMEM;
 477
 478                 if (r < 0 || cpu >= ncpus) {
 479                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 480                         CPU_FREE(c);
 481                         return -EBADMSG;
 482                 }
 483
 484                 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
 485         }
 486
 487         if (c) {
 488                 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
 489                         log_warning("Failed to set CPU affinity: %m");
 490
 491                 CPU_FREE(c);
 492         }
 493
 494         return 0;
 495 }
 496
 497 static int parse_config_file(void) {
 498
 499         const ConfigTableItem items[] = {
 500                 { "Manager", "LogLevel",              config_parse_level2,       0, NULL                     },
 501                 { "Manager", "LogTarget",             config_parse_target,       0, NULL                     },
 502                 { "Manager", "LogColor",              config_parse_color,        0, NULL                     },
 503                 { "Manager", "LogLocation",           config_parse_location,     0, NULL                     },
 504                 { "Manager", "DumpCore",              config_parse_bool,         0, &arg_dump_core           },
 505                 { "Manager", "CrashShell",            config_parse_bool,         0, &arg_crash_shell         },
 506                 { "Manager", "ShowStatus",            config_parse_bool,         0, &arg_show_status         },
 507 #ifdef HAVE_SYSV_COMPAT
 508                 { "Manager", "SysVConsole",           config_parse_bool,         0, &arg_sysv_console        },
 509 #endif
 510                 { "Manager", "CrashChVT",             config_parse_int,          0, &arg_crash_chvt          },
 511                 { "Manager", "CPUAffinity",           config_parse_cpu_affinity2, 0, NULL                    },
 512                 { "Manager", "MountAuto",             config_parse_bool,         0, &arg_mount_auto          },
 513                 { "Manager", "SwapAuto",              config_parse_bool,         0, &arg_swap_auto           },
 514                 { "Manager", "DefaultControllers",    config_parse_strv,         0, &arg_default_controllers },
 515                 { "Manager", "DefaultStandardOutput", config_parse_output,       0, &arg_default_std_output  },
 516                 { "Manager", "DefaultStandardError",  config_parse_output,       0, &arg_default_std_error   },
 517                 { NULL, NULL, NULL, 0, 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         f = fopen(fn, "re");
 526         if (!f) {
 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         r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
 535         if (r < 0)
 536                 log_warning("Failed to parse configuration file: %s", strerror(-r));
 537
 538         fclose(f);
 539
 540         return 0;
 541 }
 542
 543 static int parse_proc_cmdline(void) {
 544         char *line, *w, *state;
 545         int r;
 546         size_t l;
 547
 548         /* Don't read /proc/cmdline if we are in a container, since
 549          * that is only relevant for the host system */
 550         if (detect_container(NULL) > 0)
 551                 return 0;
 552
 553         if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
 554                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
 555                 return 0;
 556         }
 557
 558         FOREACH_WORD_QUOTED(w, l, line, state) {
 559                 char *word;
 560
 561                 if (!(word = strndup(w, l))) {
 562                         r = -ENOMEM;
 563                         goto finish;
 564                 }
 565
 566                 r = parse_proc_cmdline_word(word);
 567                 free(word);
 568
 569                 if (r < 0)
 570                         goto finish;
 571         }
 572
 573         r = 0;
 574
 575 finish:
 576         free(line);
 577         return r;
 578 }
 579
 580 static int parse_argv(int argc, char *argv[]) {
 581
 582         enum {
 583                 ARG_LOG_LEVEL = 0x100,
 584                 ARG_LOG_TARGET,
 585                 ARG_LOG_COLOR,
 586                 ARG_LOG_LOCATION,
 587                 ARG_UNIT,
 588                 ARG_SYSTEM,
 589                 ARG_USER,
 590                 ARG_TEST,
 591                 ARG_DUMP_CONFIGURATION_ITEMS,
 592                 ARG_DUMP_CORE,
 593                 ARG_CRASH_SHELL,
 594                 ARG_CONFIRM_SPAWN,
 595                 ARG_SHOW_STATUS,
 596                 ARG_SYSV_CONSOLE,
 597                 ARG_DESERIALIZE,
 598                 ARG_INTROSPECT,
 599                 ARG_DEFAULT_STD_OUTPUT,
 600                 ARG_DEFAULT_STD_ERROR
 601         };
 602
 603         static const struct option options[] = {
 604                 { "log-level",                required_argument, NULL, ARG_LOG_LEVEL                },
 605                 { "log-target",               required_argument, NULL, ARG_LOG_TARGET               },
 606                 { "log-color",                optional_argument, NULL, ARG_LOG_COLOR                },
 607                 { "log-location",             optional_argument, NULL, ARG_LOG_LOCATION             },
 608                 { "unit",                     required_argument, NULL, ARG_UNIT                     },
 609                 { "system",                   no_argument,       NULL, ARG_SYSTEM                   },
 610                 { "user",                     no_argument,       NULL, ARG_USER                     },
 611                 { "test",                     no_argument,       NULL, ARG_TEST                     },
 612                 { "help",                     no_argument,       NULL, 'h'                          },
 613                 { "dump-configuration-items", no_argument,       NULL, ARG_DUMP_CONFIGURATION_ITEMS },
 614                 { "dump-core",                no_argument,       NULL, ARG_DUMP_CORE                },
 615                 { "crash-shell",              no_argument,       NULL, ARG_CRASH_SHELL              },
 616                 { "confirm-spawn",            no_argument,       NULL, ARG_CONFIRM_SPAWN            },
 617                 { "show-status",              optional_argument, NULL, ARG_SHOW_STATUS              },
 618 #ifdef HAVE_SYSV_COMPAT
 619                 { "sysv-console",             optional_argument, NULL, ARG_SYSV_CONSOLE             },
 620 #endif
 621                 { "deserialize",              required_argument, NULL, ARG_DESERIALIZE              },
 622                 { "introspect",               optional_argument, NULL, ARG_INTROSPECT               },
 623                 { "default-standard-output",  required_argument, NULL, ARG_DEFAULT_STD_OUTPUT,      },
 624                 { "default-standard-error",   required_argument, NULL, ARG_DEFAULT_STD_ERROR,       },
 625                 { NULL,                       0,                 NULL, 0                            }
 626         };
 627
 628         int c, r;
 629
 630         assert(argc >= 1);
 631         assert(argv);
 632
 633         if (getpid() == 1)
 634                 opterr = 0;
 635
 636         while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
 637
 638                 switch (c) {
 639
 640                 case ARG_LOG_LEVEL:
 641                         if ((r = log_set_max_level_from_string(optarg)) < 0) {
 642                                 log_error("Failed to parse log level %s.", optarg);
 643                                 return r;
 644                         }
 645
 646                         break;
 647
 648                 case ARG_LOG_TARGET:
 649
 650                         if ((r = log_set_target_from_string(optarg)) < 0) {
 651                                 log_error("Failed to parse log target %s.", optarg);
 652                                 return r;
 653                         }
 654
 655                         break;
 656
 657                 case ARG_LOG_COLOR:
 658
 659                         if (optarg) {
 660                                 if ((r = log_show_color_from_string(optarg)) < 0) {
 661                                         log_error("Failed to parse log color setting %s.", optarg);
 662                                         return r;
 663                                 }
 664                         } else
 665                                 log_show_color(true);
 666
 667                         break;
 668
 669                 case ARG_LOG_LOCATION:
 670
 671                         if (optarg) {
 672                                 if ((r = log_show_location_from_string(optarg)) < 0) {
 673                                         log_error("Failed to parse log location setting %s.", optarg);
 674                                         return r;
 675                                 }
 676                         } else
 677                                 log_show_location(true);
 678
 679                         break;
 680
 681                 case ARG_DEFAULT_STD_OUTPUT:
 682
 683                         if ((r = exec_output_from_string(optarg)) < 0) {
 684                                 log_error("Failed to parse default standard output setting %s.", optarg);
 685                                 return r;
 686                         } else
 687                                 arg_default_std_output = r;
 688                         break;
 689
 690                 case ARG_DEFAULT_STD_ERROR:
 691
 692                         if ((r = exec_output_from_string(optarg)) < 0) {
 693                                 log_error("Failed to parse default standard error output setting %s.", optarg);
 694                                 return r;
 695                         } else
 696                                 arg_default_std_error = r;
 697                         break;
 698
 699                 case ARG_UNIT:
 700
 701                         if ((r = set_default_unit(optarg)) < 0) {
 702                                 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
 703                                 return r;
 704                         }
 705
 706                         break;
 707
 708                 case ARG_SYSTEM:
 709                         arg_running_as = MANAGER_SYSTEM;
 710                         break;
 711
 712                 case ARG_USER:
 713                         arg_running_as = MANAGER_USER;
 714                         break;
 715
 716                 case ARG_TEST:
 717                         arg_action = ACTION_TEST;
 718                         break;
 719
 720                 case ARG_DUMP_CONFIGURATION_ITEMS:
 721                         arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
 722                         break;
 723
 724                 case ARG_DUMP_CORE:
 725                         arg_dump_core = true;
 726                         break;
 727
 728                 case ARG_CRASH_SHELL:
 729                         arg_crash_shell = true;
 730                         break;
 731
 732                 case ARG_CONFIRM_SPAWN:
 733                         arg_confirm_spawn = true;
 734                         break;
 735
 736                 case ARG_SHOW_STATUS:
 737
 738                         if (optarg) {
 739                                 if ((r = parse_boolean(optarg)) < 0) {
 740                                         log_error("Failed to show status boolean %s.", optarg);
 741                                         return r;
 742                                 }
 743                                 arg_show_status = r;
 744                         } else
 745                                 arg_show_status = true;
 746                         break;
 747 #ifdef HAVE_SYSV_COMPAT
 748                 case ARG_SYSV_CONSOLE:
 749
 750                         if (optarg) {
 751                                 if ((r = parse_boolean(optarg)) < 0) {
 752                                         log_error("Failed to SysV console boolean %s.", optarg);
 753                                         return r;
 754                                 }
 755                                 arg_sysv_console = r;
 756                         } else
 757                                 arg_sysv_console = true;
 758                         break;
 759 #endif
 760
 761                 case ARG_DESERIALIZE: {
 762                         int fd;
 763                         FILE *f;
 764
 765                         if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
 766                                 log_error("Failed to parse deserialize option %s.", optarg);
 767                                 return r;
 768                         }
 769
 770                         if (!(f = fdopen(fd, "r"))) {
 771                                 log_error("Failed to open serialization fd: %m");
 772                                 return r;
 773                         }
 774
 775                         if (serialization)
 776                                 fclose(serialization);
 777
 778                         serialization = f;
 779
 780                         break;
 781                 }
 782
 783                 case ARG_INTROSPECT: {
 784                         const char * const * i = NULL;
 785
 786                         for (i = bus_interface_table; *i; i += 2)
 787                                 if (!optarg || streq(i[0], optarg)) {
 788                                         fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
 789                                               "<node>\n", stdout);
 790                                         fputs(i[1], stdout);
 791                                         fputs("</node>\n", stdout);
 792
 793                                         if (optarg)
 794                                                 break;
 795                                 }
 796
 797                         if (!i[0] && optarg)
 798                                 log_error("Unknown interface %s.", optarg);
 799
 800                         arg_action = ACTION_DONE;
 801                         break;
 802                 }
 803
 804                 case 'h':
 805                         arg_action = ACTION_HELP;
 806                         break;
 807
 808                 case 'D':
 809                         log_set_max_level(LOG_DEBUG);
 810                         break;
 811
 812                 case 'b':
 813                 case 's':
 814                 case 'z':
 815                         /* Just to eat away the sysvinit kernel
 816                          * cmdline args without getopt() error
 817                          * messages that we'll parse in
 818                          * parse_proc_cmdline_word() or ignore. */
 819
 820                 case '?':
 821                 default:
 822                         if (getpid() != 1) {
 823                                 log_error("Unknown option code %c", c);
 824                                 return -EINVAL;
 825                         }
 826
 827                         break;
 828                 }
 829
 830         if (optind < argc && getpid() != 1) {
 831                 /* Hmm, when we aren't run as init system
 832                  * let's complain about excess arguments */
 833
 834                 log_error("Excess arguments.");
 835                 return -EINVAL;
 836         }
 837
 838         if (detect_container(NULL) > 0) {
 839                 char **a;
 840
 841                 /* All /proc/cmdline arguments the kernel didn't
 842                  * understand it passed to us. We're not really
 843                  * interested in that usually since /proc/cmdline is
 844                  * more interesting and complete. With one exception:
 845                  * if we are run in a container /proc/cmdline is not
 846                  * relevant for the container, hence we rely on argv[]
 847                  * instead. */
 848
 849                 for (a = argv; a < argv + argc; a++)
 850                         if ((r = parse_proc_cmdline_word(*a)) < 0)
 851                                 return r;
 852         }
 853
 854         return 0;
 855 }
 856
 857 static int help(void) {
 858
 859         printf("%s [OPTIONS...]\n\n"
 860                "Starts up and maintains the system or user services.\n\n"
 861                "  -h --help                      Show this help\n"
 862                "     --test                      Determine startup sequence, dump it and exit\n"
 863                "     --dump-configuration-items  Dump understood unit configuration items\n"
 864                "     --introspect[=INTERFACE]    Extract D-Bus interface data\n"
 865                "     --unit=UNIT                 Set default unit\n"
 866                "     --system                    Run a system instance, even if PID != 1\n"
 867                "     --user                      Run a user instance\n"
 868                "     --dump-core                 Dump core on crash\n"
 869                "     --crash-shell               Run shell on crash\n"
 870                "     --confirm-spawn             Ask for confirmation when spawning processes\n"
 871                "     --show-status[=0|1]         Show status updates on the console during bootup\n"
 872 #ifdef HAVE_SYSV_COMPAT
 873                "     --sysv-console[=0|1]        Connect output of SysV scripts to console\n"
 874 #endif
 875                "     --log-target=TARGET         Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
 876                "     --log-level=LEVEL           Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
 877                "     --log-color[=0|1]           Highlight important log messages\n"
 878                "     --log-location[=0|1]        Include code location in log messages\n"
 879                "     --default-standard-output=  Set default standard output for services\n"
 880                "     --default-standard-error=   Set default standard error output for services\n",
 881                program_invocation_short_name);
 882
 883         return 0;
 884 }
 885
 886 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
 887         FILE *f = NULL;
 888         FDSet *fds = NULL;
 889         int r;
 890
 891         assert(m);
 892         assert(_f);
 893         assert(_fds);
 894
 895         /* Make sure nothing is really destructed when we shut down */
 896         m->n_reloading ++;
 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                 return;
 987
 988         log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
 989                     "Some things will probably break (sometimes even silently) in mysterious ways. "
 990                     "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
 991 }
 992
 993 static void test_cgroups(void) {
 994
 995         if (access("/proc/cgroups", F_OK) >= 0)
 996                 return;
 997
 998         log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
 999                     "Systems without control groups are not supported. "
1000                     "We will now sleep for 10s, and then continue boot-up. "
1001                     "Expect breakage and please do not file bugs. "
1002                     "Instead fix your kernel and enable CONFIG_CGROUPS." );
1003
1004         sleep(10);
1005 }
1006
1007 int main(int argc, char *argv[]) {
1008         Manager *m = NULL;
1009         int r, retval = EXIT_FAILURE;
1010         usec_t before_startup, after_startup;
1011         char timespan[FORMAT_TIMESPAN_MAX];
1012         FDSet *fds = NULL;
1013         bool reexecute = false;
1014         const char *shutdown_verb = NULL;
1015         dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1016         char systemd[] = "systemd";
1017         bool is_reexec = false;
1018         int j;
1019         bool loaded_policy = false;
1020
1021 #ifdef HAVE_SYSV_COMPAT
1022         if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1023                 /* This is compatibility support for SysV, where
1024                  * calling init as a user is identical to telinit. */
1025
1026                 errno = -ENOENT;
1027                 execv(SYSTEMCTL_BINARY_PATH, argv);
1028                 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1029                 return 1;
1030         }
1031 #endif
1032
1033         /* Determine if this is a reexecution or normal bootup. We do
1034          * the full command line parsing much later, so let's just
1035          * have a quick peek here. */
1036
1037         for (j = 1; j < argc; j++)
1038                 if (streq(argv[j], "--deserialize")) {
1039                         is_reexec = true;
1040                         break;
1041                 }
1042
1043         /* If we get started via the /sbin/init symlink then we are
1044            called 'init'. After a subsequent reexecution we are then
1045            called 'systemd'. That is confusing, hence let's call us
1046            systemd right-away. */
1047
1048         program_invocation_short_name = systemd;
1049         prctl(PR_SET_NAME, systemd);
1050         saved_argv = argv;
1051         saved_argc = argc;
1052
1053         log_show_color(isatty(STDERR_FILENO) > 0);
1054         log_show_location(false);
1055         log_set_max_level(LOG_INFO);
1056
1057         if (getpid() == 1) {
1058                 arg_running_as = MANAGER_SYSTEM;
1059                 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_SYSLOG_OR_KMSG);
1060
1061                 if (!is_reexec)
1062                         if (selinux_setup(&loaded_policy) < 0)
1063                                 goto finish;
1064
1065                 log_open();
1066
1067                 if (label_init() < 0)
1068                         goto finish;
1069
1070                 if (!is_reexec)
1071                         if (hwclock_is_localtime() > 0) {
1072                                 int min;
1073
1074                                 r = hwclock_apply_localtime_delta(&min);
1075                                 if (r < 0)
1076                                         log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1077                                 else
1078                                         log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1079                         }
1080
1081         } else {
1082                 arg_running_as = MANAGER_USER;
1083                 log_set_target(LOG_TARGET_AUTO);
1084                 log_open();
1085         }
1086
1087         if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1088                 goto finish;
1089
1090         /* Mount /proc, /sys and friends, so that /proc/cmdline and
1091          * /proc/$PID/fd is available. */
1092         if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS"))
1093                 if (mount_setup(loaded_policy) < 0)
1094                         goto finish;
1095
1096         /* Reset all signal handlers. */
1097         assert_se(reset_all_signal_handlers() == 0);
1098
1099         /* If we are init, we can block sigkill. Yay. */
1100         ignore_signals(SIGNALS_IGNORE, -1);
1101
1102         if (parse_config_file() < 0)
1103                 goto finish;
1104
1105         if (arg_running_as == MANAGER_SYSTEM)
1106                 if (parse_proc_cmdline() < 0)
1107                         goto finish;
1108
1109         log_parse_environment();
1110
1111         if (parse_argv(argc, argv) < 0)
1112                 goto finish;
1113
1114         if (arg_action == ACTION_TEST && geteuid() == 0) {
1115                 log_error("Don't run test mode as root.");
1116                 goto finish;
1117         }
1118
1119         if (arg_running_as == MANAGER_SYSTEM &&
1120             arg_action == ACTION_RUN &&
1121             running_in_chroot() > 0) {
1122                 log_error("Cannot be run in a chroot() environment.");
1123                 goto finish;
1124         }
1125
1126         if (arg_action == ACTION_HELP) {
1127                 retval = help();
1128                 goto finish;
1129         } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1130                 unit_dump_config_items(stdout);
1131                 retval = EXIT_SUCCESS;
1132                 goto finish;
1133         } else if (arg_action == ACTION_DONE) {
1134                 retval = EXIT_SUCCESS;
1135                 goto finish;
1136         }
1137
1138         assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1139
1140         /* Close logging fds, in order not to confuse fdset below */
1141         log_close();
1142
1143         /* Remember open file descriptors for later deserialization */
1144         if (serialization) {
1145                 if ((r = fdset_new_fill(&fds)) < 0) {
1146                         log_error("Failed to allocate fd set: %s", strerror(-r));
1147                         goto finish;
1148                 }
1149
1150                 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1151         } else
1152                 close_all_fds(NULL, 0);
1153
1154         /* Set up PATH unless it is already set */
1155         setenv("PATH",
1156                "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1157                arg_running_as == MANAGER_SYSTEM);
1158
1159         if (arg_running_as == MANAGER_SYSTEM) {
1160                 /* Parse the data passed to us by the initrd and unset it */
1161                 parse_initrd_timestamp(&initrd_timestamp);
1162                 filter_environ("RD_");
1163
1164                 /* Unset some environment variables passed in from the
1165                  * kernel that don't really make sense for us. */
1166                 unsetenv("HOME");
1167                 unsetenv("TERM");
1168
1169                 /* All other variables are left as is, so that clients
1170                  * can still read them via /proc/1/environ */
1171         }
1172
1173         /* Move out of the way, so that we won't block unmounts */
1174         assert_se(chdir("/")  == 0);
1175
1176         if (arg_running_as == MANAGER_SYSTEM) {
1177                 /* Become a session leader if we aren't one yet. */
1178                 setsid();
1179
1180                 /* Disable the umask logic */
1181                 umask(0);
1182         }
1183
1184         /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1185         dbus_connection_set_change_sigpipe(FALSE);
1186
1187         /* Reset the console, but only if this is really init and we
1188          * are freshly booted */
1189         if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1190                 console_setup(getpid() == 1 && !is_reexec);
1191                 make_null_stdio();
1192         }
1193
1194         /* Open the logging devices, if possible and necessary */
1195         log_open();
1196
1197         /* Make sure we leave a core dump without panicing the
1198          * kernel. */
1199         if (getpid() == 1)
1200                 install_crash_handler();
1201
1202         log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1203                  PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1204
1205         if (arg_running_as == MANAGER_SYSTEM && !is_reexec) {
1206                 locale_setup();
1207
1208                 if (arg_show_status || plymouth_running())
1209                         status_welcome();
1210
1211                 kmod_setup();
1212                 hostname_setup();
1213                 machine_id_setup();
1214                 loopback_setup();
1215
1216                 test_mtab();
1217                 test_usr();
1218                 test_cgroups();
1219         }
1220
1221         if ((r = manager_new(arg_running_as, &m)) < 0) {
1222                 log_error("Failed to allocate manager object: %s", strerror(-r));
1223                 goto finish;
1224         }
1225
1226         m->confirm_spawn = arg_confirm_spawn;
1227         m->show_status = arg_show_status;
1228 #ifdef HAVE_SYSV_COMPAT
1229         m->sysv_console = arg_sysv_console;
1230 #endif
1231         m->mount_auto = arg_mount_auto;
1232         m->swap_auto = arg_swap_auto;
1233         m->default_std_output = arg_default_std_output;
1234         m->default_std_error = arg_default_std_error;
1235
1236         if (dual_timestamp_is_set(&initrd_timestamp))
1237                 m->initrd_timestamp = initrd_timestamp;
1238
1239         if (arg_default_controllers)
1240                 manager_set_default_controllers(m, arg_default_controllers);
1241
1242         before_startup = now(CLOCK_MONOTONIC);
1243
1244         if ((r = manager_startup(m, serialization, fds)) < 0)
1245                 log_error("Failed to fully start up daemon: %s", strerror(-r));
1246
1247         if (fds) {
1248                 /* This will close all file descriptors that were opened, but
1249                  * not claimed by any unit. */
1250
1251                 fdset_free(fds);
1252                 fds = NULL;
1253         }
1254
1255         if (serialization) {
1256                 fclose(serialization);
1257                 serialization = NULL;
1258         } else {
1259                 DBusError error;
1260                 Unit *target = NULL;
1261
1262                 dbus_error_init(&error);
1263
1264                 log_debug("Activating default unit: %s", arg_default_unit);
1265
1266                 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1267                         log_error("Failed to load default target: %s", bus_error(&error, r));
1268                         dbus_error_free(&error);
1269                 } else if (target->meta.load_state == UNIT_ERROR)
1270                         log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
1271                 else if (target->meta.load_state == UNIT_MASKED)
1272                         log_error("Default target masked.");
1273
1274                 if (!target || target->meta.load_state != UNIT_LOADED) {
1275                         log_info("Trying to load rescue target...");
1276
1277                         if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1278                                 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1279                                 dbus_error_free(&error);
1280                                 goto finish;
1281                         } else if (target->meta.load_state == UNIT_ERROR) {
1282                                 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1283                                 goto finish;
1284                         } else if (target->meta.load_state == UNIT_MASKED) {
1285                                 log_error("Rescue target masked.");
1286                                 goto finish;
1287                         }
1288                 }
1289
1290                 assert(target->meta.load_state == UNIT_LOADED);
1291
1292                 if (arg_action == ACTION_TEST) {
1293                         printf("-> By units:\n");
1294                         manager_dump_units(m, stdout, "\t");
1295                 }
1296
1297                 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
1298                         log_error("Failed to start default target: %s", bus_error(&error, r));
1299                         dbus_error_free(&error);
1300                         goto finish;
1301                 }
1302
1303                 after_startup = now(CLOCK_MONOTONIC);
1304                 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1305                          "Loaded units and determined initial transaction in %s.",
1306                           format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1307
1308                 if (arg_action == ACTION_TEST) {
1309                         printf("-> By jobs:\n");
1310                         manager_dump_jobs(m, stdout, "\t");
1311                         retval = EXIT_SUCCESS;
1312                         goto finish;
1313                 }
1314         }
1315
1316         for (;;) {
1317                 if ((r = manager_loop(m)) < 0) {
1318                         log_error("Failed to run mainloop: %s", strerror(-r));
1319                         goto finish;
1320                 }
1321
1322                 switch (m->exit_code) {
1323
1324                 case MANAGER_EXIT:
1325                         retval = EXIT_SUCCESS;
1326                         log_debug("Exit.");
1327                         goto finish;
1328
1329                 case MANAGER_RELOAD:
1330                         log_info("Reloading.");
1331                         if ((r = manager_reload(m)) < 0)
1332                                 log_error("Failed to reload: %s", strerror(-r));
1333                         break;
1334
1335                 case MANAGER_REEXECUTE:
1336                         if (prepare_reexecute(m, &serialization, &fds) < 0)
1337                                 goto finish;
1338
1339                         reexecute = true;
1340                         log_notice("Reexecuting.");
1341                         goto finish;
1342
1343                 case MANAGER_REBOOT:
1344                 case MANAGER_POWEROFF:
1345                 case MANAGER_HALT:
1346                 case MANAGER_KEXEC: {
1347                         static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1348                                 [MANAGER_REBOOT] = "reboot",
1349                                 [MANAGER_POWEROFF] = "poweroff",
1350                                 [MANAGER_HALT] = "halt",
1351                                 [MANAGER_KEXEC] = "kexec"
1352                         };
1353
1354                         assert_se(shutdown_verb = table[m->exit_code]);
1355
1356                         log_notice("Shutting down.");
1357                         goto finish;
1358                 }
1359
1360                 default:
1361                         assert_not_reached("Unknown exit code.");
1362                 }
1363         }
1364
1365 finish:
1366         if (m)
1367                 manager_free(m);
1368
1369         free(arg_default_unit);
1370         strv_free(arg_default_controllers);
1371
1372         dbus_shutdown();
1373
1374         label_finish();
1375
1376         if (reexecute) {
1377                 const char *args[15];
1378                 unsigned i = 0;
1379                 char sfd[16];
1380
1381                 assert(serialization);
1382                 assert(fds);
1383
1384                 args[i++] = SYSTEMD_BINARY_PATH;
1385
1386                 args[i++] = "--log-level";
1387                 args[i++] = log_level_to_string(log_get_max_level());
1388
1389                 args[i++] = "--log-target";
1390                 args[i++] = log_target_to_string(log_get_target());
1391
1392                 if (arg_running_as == MANAGER_SYSTEM)
1393                         args[i++] = "--system";
1394                 else
1395                         args[i++] = "--user";
1396
1397                 if (arg_dump_core)
1398                         args[i++] = "--dump-core";
1399
1400                 if (arg_crash_shell)
1401                         args[i++] = "--crash-shell";
1402
1403                 if (arg_confirm_spawn)
1404                         args[i++] = "--confirm-spawn";
1405
1406                 if (arg_show_status)
1407                         args[i++] = "--show-status=1";
1408                 else
1409                         args[i++] = "--show-status=0";
1410
1411 #ifdef HAVE_SYSV_COMPAT
1412                 if (arg_sysv_console)
1413                         args[i++] = "--sysv-console=1";
1414                 else
1415                         args[i++] = "--sysv-console=0";
1416 #endif
1417
1418                 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1419                 char_array_0(sfd);
1420
1421                 args[i++] = "--deserialize";
1422                 args[i++] = sfd;
1423
1424                 args[i++] = NULL;
1425
1426                 assert(i <= ELEMENTSOF(args));
1427
1428                 execv(args[0], (char* const*) args);
1429
1430                 log_error("Failed to reexecute: %m");
1431         }
1432
1433         if (serialization)
1434                 fclose(serialization);
1435
1436         if (fds)
1437                 fdset_free(fds);
1438
1439         if (shutdown_verb) {
1440                 const char * command_line[] = {
1441                         SYSTEMD_SHUTDOWN_BINARY_PATH,
1442                         shutdown_verb,
1443                         NULL
1444                 };
1445
1446                 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1447                 log_error("Failed to execute shutdown binary, freezing: %m");
1448         }
1449
1450         if (getpid() == 1)
1451                 freeze();
1452
1453         return retval;
1454 }