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 char ***arg_join_controllers = NULL;
  79 static ExecOutput arg_default_std_output = EXEC_OUTPUT_SYSLOG;
  80 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
  81
  82 static FILE* serialization = NULL;
  83
  84 static void nop_handler(int sig) {
  85 }
  86
  87 _noreturn_ static void crash(int sig) {
  88
  89         if (!arg_dump_core)
  90                 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
  91         else {
  92                 struct sigaction sa;
  93                 pid_t pid;
  94
  95                 /* We want to wait for the core process, hence let's enable SIGCHLD */
  96                 zero(sa);
  97                 sa.sa_handler = nop_handler;
  98                 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
  99                 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
 100
 101                 if ((pid = fork()) < 0)
 102                         log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
 103
 104                 else if (pid == 0) {
 105                         struct rlimit rl;
 106
 107                         /* Enable default signal handler for core dump */
 108                         zero(sa);
 109                         sa.sa_handler = SIG_DFL;
 110                         assert_se(sigaction(sig, &sa, NULL) == 0);
 111
 112                         /* Don't limit the core dump size */
 113                         zero(rl);
 114                         rl.rlim_cur = RLIM_INFINITY;
 115                         rl.rlim_max = RLIM_INFINITY;
 116                         setrlimit(RLIMIT_CORE, &rl);
 117
 118                         /* Just to be sure... */
 119                         assert_se(chdir("/") == 0);
 120
 121                         /* Raise the signal again */
 122                         raise(sig);
 123
 124                         assert_not_reached("We shouldn't be here...");
 125                         _exit(1);
 126
 127                 } else {
 128                         siginfo_t status;
 129                         int r;
 130
 131                         /* Order things nicely. */
 132                         if ((r = wait_for_terminate(pid, &status)) < 0)
 133                                 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
 134                         else if (status.si_code != CLD_DUMPED)
 135                                 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
 136                         else
 137                                 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
 138                 }
 139         }
 140
 141         if (arg_crash_chvt)
 142                 chvt(arg_crash_chvt);
 143
 144         if (arg_crash_shell) {
 145                 struct sigaction sa;
 146                 pid_t pid;
 147
 148                 log_info("Executing crash shell in 10s...");
 149                 sleep(10);
 150
 151                 /* Let the kernel reap children for us */
 152                 zero(sa);
 153                 sa.sa_handler = SIG_IGN;
 154                 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
 155                 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
 156
 157                 if ((pid = fork()) < 0)
 158                         log_error("Failed to fork off crash shell: %s", strerror(errno));
 159                 else if (pid == 0) {
 160                         int fd, r;
 161
 162                         if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
 163                                 log_error("Failed to acquire terminal: %s", strerror(-fd));
 164                         else if ((r = make_stdio(fd)) < 0)
 165                                 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
 166
 167                         execl("/bin/sh", "/bin/sh", NULL);
 168
 169                         log_error("execl() failed: %s", strerror(errno));
 170                         _exit(1);
 171                 }
 172
 173                 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
 174         }
 175
 176         log_info("Freezing execution.");
 177         freeze();
 178 }
 179
 180 static void install_crash_handler(void) {
 181         struct sigaction sa;
 182
 183         zero(sa);
 184
 185         sa.sa_handler = crash;
 186         sa.sa_flags = SA_NODEFER;
 187
 188         sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
 189 }
 190
 191 static int console_setup(bool do_reset) {
 192         int tty_fd, r;
 193
 194         /* If we are init, we connect stdin/stdout/stderr to /dev/null
 195          * and make sure we don't have a controlling tty. */
 196
 197         release_terminal();
 198
 199         if (!do_reset)
 200                 return 0;
 201
 202         if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
 203                 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
 204                 return -tty_fd;
 205         }
 206
 207         if ((r = reset_terminal_fd(tty_fd)) < 0)
 208                 log_error("Failed to reset /dev/console: %s", strerror(-r));
 209
 210         close_nointr_nofail(tty_fd);
 211         return r;
 212 }
 213
 214 static int set_default_unit(const char *u) {
 215         char *c;
 216
 217         assert(u);
 218
 219         if (!(c = strdup(u)))
 220                 return -ENOMEM;
 221
 222         free(arg_default_unit);
 223         arg_default_unit = c;
 224         return 0;
 225 }
 226
 227 static int parse_proc_cmdline_word(const char *word) {
 228
 229         static const char * const rlmap[] = {
 230                 "emergency", SPECIAL_EMERGENCY_TARGET,
 231                 "-b",        SPECIAL_EMERGENCY_TARGET,
 232                 "single",    SPECIAL_RESCUE_TARGET,
 233                 "-s",        SPECIAL_RESCUE_TARGET,
 234                 "s",         SPECIAL_RESCUE_TARGET,
 235                 "S",         SPECIAL_RESCUE_TARGET,
 236                 "1",         SPECIAL_RESCUE_TARGET,
 237                 "2",         SPECIAL_RUNLEVEL2_TARGET,
 238                 "3",         SPECIAL_RUNLEVEL3_TARGET,
 239                 "4",         SPECIAL_RUNLEVEL4_TARGET,
 240                 "5",         SPECIAL_RUNLEVEL5_TARGET,
 241         };
 242
 243         assert(word);
 244
 245         if (startswith(word, "systemd.unit="))
 246                 return set_default_unit(word + 13);
 247
 248         else if (startswith(word, "systemd.log_target=")) {
 249
 250                 if (log_set_target_from_string(word + 19) < 0)
 251                         log_warning("Failed to parse log target %s. Ignoring.", word + 19);
 252
 253         } else if (startswith(word, "systemd.log_level=")) {
 254
 255                 if (log_set_max_level_from_string(word + 18) < 0)
 256                         log_warning("Failed to parse log level %s. Ignoring.", word + 18);
 257
 258         } else if (startswith(word, "systemd.log_color=")) {
 259
 260                 if (log_show_color_from_string(word + 18) < 0)
 261                         log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
 262
 263         } else if (startswith(word, "systemd.log_location=")) {
 264
 265                 if (log_show_location_from_string(word + 21) < 0)
 266                         log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
 267
 268         } else if (startswith(word, "systemd.dump_core=")) {
 269                 int r;
 270
 271                 if ((r = parse_boolean(word + 18)) < 0)
 272                         log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
 273                 else
 274                         arg_dump_core = r;
 275
 276         } else if (startswith(word, "systemd.crash_shell=")) {
 277                 int r;
 278
 279                 if ((r = parse_boolean(word + 20)) < 0)
 280                         log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
 281                 else
 282                         arg_crash_shell = r;
 283
 284         } else if (startswith(word, "systemd.confirm_spawn=")) {
 285                 int r;
 286
 287                 if ((r = parse_boolean(word + 22)) < 0)
 288                         log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
 289                 else
 290                         arg_confirm_spawn = r;
 291
 292         } else if (startswith(word, "systemd.crash_chvt=")) {
 293                 int k;
 294
 295                 if (safe_atoi(word + 19, &k) < 0)
 296                         log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
 297                 else
 298                         arg_crash_chvt = k;
 299
 300         } else if (startswith(word, "systemd.show_status=")) {
 301                 int r;
 302
 303                 if ((r = parse_boolean(word + 20)) < 0)
 304                         log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
 305                 else
 306                         arg_show_status = r;
 307         } else if (startswith(word, "systemd.default_standard_output=")) {
 308                 int r;
 309
 310                 if ((r = exec_output_from_string(word + 32)) < 0)
 311                         log_warning("Failed to parse default standard output switch %s, Ignoring.", word + 32);
 312                 else
 313                         arg_default_std_output = r;
 314         } else if (startswith(word, "systemd.default_standard_error=")) {
 315                 int r;
 316
 317                 if ((r = exec_output_from_string(word + 31)) < 0)
 318                         log_warning("Failed to parse default standard error switch %s, Ignoring.", word + 31);
 319                 else
 320                         arg_default_std_error = r;
 321 #ifdef HAVE_SYSV_COMPAT
 322         } else if (startswith(word, "systemd.sysv_console=")) {
 323                 int r;
 324
 325                 if ((r = parse_boolean(word + 21)) < 0)
 326                         log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
 327                 else
 328                         arg_sysv_console = r;
 329 #endif
 330
 331         } else if (startswith(word, "systemd.")) {
 332
 333                 log_warning("Unknown kernel switch %s. Ignoring.", word);
 334
 335                 log_info("Supported kernel switches:\n"
 336                          "systemd.unit=UNIT                        Default unit to start\n"
 337                          "systemd.dump_core=0|1                    Dump core on crash\n"
 338                          "systemd.crash_shell=0|1                  Run shell on crash\n"
 339                          "systemd.crash_chvt=N                     Change to VT #N on crash\n"
 340                          "systemd.confirm_spawn=0|1                Confirm every process spawn\n"
 341                          "systemd.show_status=0|1                  Show status updates on the console during bootup\n"
 342 #ifdef HAVE_SYSV_COMPAT
 343                          "systemd.sysv_console=0|1                 Connect output of SysV scripts to console\n"
 344 #endif
 345                          "systemd.log_target=console|kmsg|syslog|syslog-or-kmsg|null\n"
 346                          "                                         Log target\n"
 347                          "systemd.log_level=LEVEL                  Log level\n"
 348                          "systemd.log_color=0|1                    Highlight important log messages\n"
 349                          "systemd.log_location=0|1                 Include code location in log messages\n"
 350                          "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
 351                          "                                         Set default log output for services\n"
 352                          "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
 353                          "                                         Set default log error output for services\n");
 354
 355         } else if (streq(word, "quiet")) {
 356                 arg_show_status = false;
 357 #ifdef HAVE_SYSV_COMPAT
 358                 arg_sysv_console = false;
 359 #endif
 360         } else {
 361                 unsigned i;
 362
 363                 /* SysV compatibility */
 364                 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
 365                         if (streq(word, rlmap[i]))
 366                                 return set_default_unit(rlmap[i+1]);
 367         }
 368
 369         return 0;
 370 }
 371
 372 static int config_parse_level2(
 373                 const char *filename,
 374                 unsigned line,
 375                 const char *section,
 376                 const char *lvalue,
 377                 int ltype,
 378                 const char *rvalue,
 379                 void *data,
 380                 void *userdata) {
 381
 382         assert(filename);
 383         assert(lvalue);
 384         assert(rvalue);
 385
 386         log_set_max_level_from_string(rvalue);
 387         return 0;
 388 }
 389
 390 static int config_parse_target(
 391                 const char *filename,
 392                 unsigned line,
 393                 const char *section,
 394                 const char *lvalue,
 395                 int ltype,
 396                 const char *rvalue,
 397                 void *data,
 398                 void *userdata) {
 399
 400         assert(filename);
 401         assert(lvalue);
 402         assert(rvalue);
 403
 404         log_set_target_from_string(rvalue);
 405         return 0;
 406 }
 407
 408 static int config_parse_color(
 409                 const char *filename,
 410                 unsigned line,
 411                 const char *section,
 412                 const char *lvalue,
 413                 int ltype,
 414                 const char *rvalue,
 415                 void *data,
 416                 void *userdata) {
 417
 418         assert(filename);
 419         assert(lvalue);
 420         assert(rvalue);
 421
 422         log_show_color_from_string(rvalue);
 423         return 0;
 424 }
 425
 426 static int config_parse_location(
 427                 const char *filename,
 428                 unsigned line,
 429                 const char *section,
 430                 const char *lvalue,
 431                 int ltype,
 432                 const char *rvalue,
 433                 void *data,
 434                 void *userdata) {
 435
 436         assert(filename);
 437         assert(lvalue);
 438         assert(rvalue);
 439
 440         log_show_location_from_string(rvalue);
 441         return 0;
 442 }
 443
 444 static int config_parse_cpu_affinity2(
 445                 const char *filename,
 446                 unsigned line,
 447                 const char *section,
 448                 const char *lvalue,
 449                 int ltype,
 450                 const char *rvalue,
 451                 void *data,
 452                 void *userdata) {
 453
 454         char *w;
 455         size_t l;
 456         char *state;
 457         cpu_set_t *c = NULL;
 458         unsigned ncpus = 0;
 459
 460         assert(filename);
 461         assert(lvalue);
 462         assert(rvalue);
 463
 464         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 465                 char *t;
 466                 int r;
 467                 unsigned cpu;
 468
 469                 if (!(t = strndup(w, l)))
 470                         return -ENOMEM;
 471
 472                 r = safe_atou(t, &cpu);
 473                 free(t);
 474
 475                 if (!c)
 476                         if (!(c = cpu_set_malloc(&ncpus)))
 477                                 return -ENOMEM;
 478
 479                 if (r < 0 || cpu >= ncpus) {
 480                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 481                         CPU_FREE(c);
 482                         return -EBADMSG;
 483                 }
 484
 485                 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
 486         }
 487
 488         if (c) {
 489                 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
 490                         log_warning("Failed to set CPU affinity: %m");
 491
 492                 CPU_FREE(c);
 493         }
 494
 495         return 0;
 496 }
 497
 498 static void strv_free_free(char ***l) {
 499         char ***i;
 500
 501         if (!l)
 502                 return;
 503
 504         for (i = l; *i; i++)
 505                 strv_free(*i);
 506
 507         free(l);
 508 }
 509
 510 static void free_join_controllers(void) {
 511         if (!arg_join_controllers)
 512                 return;
 513
 514         strv_free_free(arg_join_controllers);
 515         arg_join_controllers = NULL;
 516 }
 517
 518 static int config_parse_join_controllers(
 519                 const char *filename,
 520                 unsigned line,
 521                 const char *section,
 522                 const char *lvalue,
 523                 int ltype,
 524                 const char *rvalue,
 525                 void *data,
 526                 void *userdata) {
 527
 528         unsigned n = 0;
 529         char *state, *w;
 530         size_t length;
 531
 532         assert(filename);
 533         assert(lvalue);
 534         assert(rvalue);
 535
 536         free_join_controllers();
 537
 538         FOREACH_WORD_QUOTED(w, length, rvalue, state) {
 539                 char *s, **l;
 540
 541                 s = strndup(w, length);
 542                 if (!s)
 543                         return -ENOMEM;
 544
 545                 l = strv_split(s, ",");
 546                 free(s);
 547
 548                 strv_uniq(l);
 549
 550                 if (strv_length(l) <= 1) {
 551                         strv_free(l);
 552                         continue;
 553                 }
 554
 555                 if (!arg_join_controllers) {
 556                         arg_join_controllers = new(char**, 2);
 557                         if (!arg_join_controllers) {
 558                                 strv_free(l);
 559                                 return -ENOMEM;
 560                         }
 561
 562                         arg_join_controllers[0] = l;
 563                         arg_join_controllers[1] = NULL;
 564
 565                         n = 1;
 566                 } else {
 567                         char ***a;
 568                         char ***t;
 569
 570                         t = new0(char**, n+2);
 571                         if (!t) {
 572                                 strv_free(l);
 573                                 return -ENOMEM;
 574                         }
 575
 576                         n = 0;
 577
 578                         for (a = arg_join_controllers; *a; a++) {
 579
 580                                 if (strv_overlap(*a, l)) {
 581                                         char **c;
 582
 583                                         c = strv_merge(*a, l);
 584                                         if (!c) {
 585                                                 strv_free(l);
 586                                                 strv_free_free(t);
 587                                                 return -ENOMEM;
 588                                         }
 589
 590                                         strv_free(l);
 591                                         l = c;
 592                                 } else {
 593                                         char **c;
 594
 595                                         c = strv_copy(*a);
 596                                         if (!c) {
 597                                                 strv_free(l);
 598                                                 strv_free_free(t);
 599                                                 return -ENOMEM;
 600                                         }
 601
 602                                         t[n++] = c;
 603                                 }
 604                         }
 605
 606                         t[n++] = strv_uniq(l);
 607
 608                         strv_free_free(arg_join_controllers);
 609                         arg_join_controllers = t;
 610                 }
 611         }
 612
 613         return 0;
 614 }
 615
 616 static int parse_config_file(void) {
 617
 618         const ConfigTableItem items[] = {
 619                 { "Manager", "LogLevel",              config_parse_level2,       0, NULL                     },
 620                 { "Manager", "LogTarget",             config_parse_target,       0, NULL                     },
 621                 { "Manager", "LogColor",              config_parse_color,        0, NULL                     },
 622                 { "Manager", "LogLocation",           config_parse_location,     0, NULL                     },
 623                 { "Manager", "DumpCore",              config_parse_bool,         0, &arg_dump_core           },
 624                 { "Manager", "CrashShell",            config_parse_bool,         0, &arg_crash_shell         },
 625                 { "Manager", "ShowStatus",            config_parse_bool,         0, &arg_show_status         },
 626 #ifdef HAVE_SYSV_COMPAT
 627                 { "Manager", "SysVConsole",           config_parse_bool,         0, &arg_sysv_console        },
 628 #endif
 629                 { "Manager", "CrashChVT",             config_parse_int,          0, &arg_crash_chvt          },
 630                 { "Manager", "CPUAffinity",           config_parse_cpu_affinity2, 0, NULL                    },
 631                 { "Manager", "MountAuto",             config_parse_bool,         0, &arg_mount_auto          },
 632                 { "Manager", "SwapAuto",              config_parse_bool,         0, &arg_swap_auto           },
 633                 { "Manager", "DefaultControllers",    config_parse_strv,         0, &arg_default_controllers },
 634                 { "Manager", "DefaultStandardOutput", config_parse_output,       0, &arg_default_std_output  },
 635                 { "Manager", "DefaultStandardError",  config_parse_output,       0, &arg_default_std_error   },
 636                 { "Manager", "JoinControllers",       config_parse_join_controllers, 0, &arg_join_controllers },
 637                 { NULL, NULL, NULL, 0, NULL }
 638         };
 639
 640         FILE *f;
 641         const char *fn;
 642         int r;
 643
 644         fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
 645         f = fopen(fn, "re");
 646         if (!f) {
 647                 if (errno == ENOENT)
 648                         return 0;
 649
 650                 log_warning("Failed to open configuration file '%s': %m", fn);
 651                 return 0;
 652         }
 653
 654         r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
 655         if (r < 0)
 656                 log_warning("Failed to parse configuration file: %s", strerror(-r));
 657
 658         fclose(f);
 659
 660         return 0;
 661 }
 662
 663 static int parse_proc_cmdline(void) {
 664         char *line, *w, *state;
 665         int r;
 666         size_t l;
 667
 668         /* Don't read /proc/cmdline if we are in a container, since
 669          * that is only relevant for the host system */
 670         if (detect_container(NULL) > 0)
 671                 return 0;
 672
 673         if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
 674                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
 675                 return 0;
 676         }
 677
 678         FOREACH_WORD_QUOTED(w, l, line, state) {
 679                 char *word;
 680
 681                 if (!(word = strndup(w, l))) {
 682                         r = -ENOMEM;
 683                         goto finish;
 684                 }
 685
 686                 r = parse_proc_cmdline_word(word);
 687                 free(word);
 688
 689                 if (r < 0)
 690                         goto finish;
 691         }
 692
 693         r = 0;
 694
 695 finish:
 696         free(line);
 697         return r;
 698 }
 699
 700 static int parse_argv(int argc, char *argv[]) {
 701
 702         enum {
 703                 ARG_LOG_LEVEL = 0x100,
 704                 ARG_LOG_TARGET,
 705                 ARG_LOG_COLOR,
 706                 ARG_LOG_LOCATION,
 707                 ARG_UNIT,
 708                 ARG_SYSTEM,
 709                 ARG_USER,
 710                 ARG_TEST,
 711                 ARG_DUMP_CONFIGURATION_ITEMS,
 712                 ARG_DUMP_CORE,
 713                 ARG_CRASH_SHELL,
 714                 ARG_CONFIRM_SPAWN,
 715                 ARG_SHOW_STATUS,
 716                 ARG_SYSV_CONSOLE,
 717                 ARG_DESERIALIZE,
 718                 ARG_INTROSPECT,
 719                 ARG_DEFAULT_STD_OUTPUT,
 720                 ARG_DEFAULT_STD_ERROR
 721         };
 722
 723         static const struct option options[] = {
 724                 { "log-level",                required_argument, NULL, ARG_LOG_LEVEL                },
 725                 { "log-target",               required_argument, NULL, ARG_LOG_TARGET               },
 726                 { "log-color",                optional_argument, NULL, ARG_LOG_COLOR                },
 727                 { "log-location",             optional_argument, NULL, ARG_LOG_LOCATION             },
 728                 { "unit",                     required_argument, NULL, ARG_UNIT                     },
 729                 { "system",                   no_argument,       NULL, ARG_SYSTEM                   },
 730                 { "user",                     no_argument,       NULL, ARG_USER                     },
 731                 { "test",                     no_argument,       NULL, ARG_TEST                     },
 732                 { "help",                     no_argument,       NULL, 'h'                          },
 733                 { "dump-configuration-items", no_argument,       NULL, ARG_DUMP_CONFIGURATION_ITEMS },
 734                 { "dump-core",                no_argument,       NULL, ARG_DUMP_CORE                },
 735                 { "crash-shell",              no_argument,       NULL, ARG_CRASH_SHELL              },
 736                 { "confirm-spawn",            no_argument,       NULL, ARG_CONFIRM_SPAWN            },
 737                 { "show-status",              optional_argument, NULL, ARG_SHOW_STATUS              },
 738 #ifdef HAVE_SYSV_COMPAT
 739                 { "sysv-console",             optional_argument, NULL, ARG_SYSV_CONSOLE             },
 740 #endif
 741                 { "deserialize",              required_argument, NULL, ARG_DESERIALIZE              },
 742                 { "introspect",               optional_argument, NULL, ARG_INTROSPECT               },
 743                 { "default-standard-output",  required_argument, NULL, ARG_DEFAULT_STD_OUTPUT,      },
 744                 { "default-standard-error",   required_argument, NULL, ARG_DEFAULT_STD_ERROR,       },
 745                 { NULL,                       0,                 NULL, 0                            }
 746         };
 747
 748         int c, r;
 749
 750         assert(argc >= 1);
 751         assert(argv);
 752
 753         if (getpid() == 1)
 754                 opterr = 0;
 755
 756         while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
 757
 758                 switch (c) {
 759
 760                 case ARG_LOG_LEVEL:
 761                         if ((r = log_set_max_level_from_string(optarg)) < 0) {
 762                                 log_error("Failed to parse log level %s.", optarg);
 763                                 return r;
 764                         }
 765
 766                         break;
 767
 768                 case ARG_LOG_TARGET:
 769
 770                         if ((r = log_set_target_from_string(optarg)) < 0) {
 771                                 log_error("Failed to parse log target %s.", optarg);
 772                                 return r;
 773                         }
 774
 775                         break;
 776
 777                 case ARG_LOG_COLOR:
 778
 779                         if (optarg) {
 780                                 if ((r = log_show_color_from_string(optarg)) < 0) {
 781                                         log_error("Failed to parse log color setting %s.", optarg);
 782                                         return r;
 783                                 }
 784                         } else
 785                                 log_show_color(true);
 786
 787                         break;
 788
 789                 case ARG_LOG_LOCATION:
 790
 791                         if (optarg) {
 792                                 if ((r = log_show_location_from_string(optarg)) < 0) {
 793                                         log_error("Failed to parse log location setting %s.", optarg);
 794                                         return r;
 795                                 }
 796                         } else
 797                                 log_show_location(true);
 798
 799                         break;
 800
 801                 case ARG_DEFAULT_STD_OUTPUT:
 802
 803                         if ((r = exec_output_from_string(optarg)) < 0) {
 804                                 log_error("Failed to parse default standard output setting %s.", optarg);
 805                                 return r;
 806                         } else
 807                                 arg_default_std_output = r;
 808                         break;
 809
 810                 case ARG_DEFAULT_STD_ERROR:
 811
 812                         if ((r = exec_output_from_string(optarg)) < 0) {
 813                                 log_error("Failed to parse default standard error output setting %s.", optarg);
 814                                 return r;
 815                         } else
 816                                 arg_default_std_error = r;
 817                         break;
 818
 819                 case ARG_UNIT:
 820
 821                         if ((r = set_default_unit(optarg)) < 0) {
 822                                 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
 823                                 return r;
 824                         }
 825
 826                         break;
 827
 828                 case ARG_SYSTEM:
 829                         arg_running_as = MANAGER_SYSTEM;
 830                         break;
 831
 832                 case ARG_USER:
 833                         arg_running_as = MANAGER_USER;
 834                         break;
 835
 836                 case ARG_TEST:
 837                         arg_action = ACTION_TEST;
 838                         break;
 839
 840                 case ARG_DUMP_CONFIGURATION_ITEMS:
 841                         arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
 842                         break;
 843
 844                 case ARG_DUMP_CORE:
 845                         arg_dump_core = true;
 846                         break;
 847
 848                 case ARG_CRASH_SHELL:
 849                         arg_crash_shell = true;
 850                         break;
 851
 852                 case ARG_CONFIRM_SPAWN:
 853                         arg_confirm_spawn = true;
 854                         break;
 855
 856                 case ARG_SHOW_STATUS:
 857
 858                         if (optarg) {
 859                                 if ((r = parse_boolean(optarg)) < 0) {
 860                                         log_error("Failed to show status boolean %s.", optarg);
 861                                         return r;
 862                                 }
 863                                 arg_show_status = r;
 864                         } else
 865                                 arg_show_status = true;
 866                         break;
 867 #ifdef HAVE_SYSV_COMPAT
 868                 case ARG_SYSV_CONSOLE:
 869
 870                         if (optarg) {
 871                                 if ((r = parse_boolean(optarg)) < 0) {
 872                                         log_error("Failed to SysV console boolean %s.", optarg);
 873                                         return r;
 874                                 }
 875                                 arg_sysv_console = r;
 876                         } else
 877                                 arg_sysv_console = true;
 878                         break;
 879 #endif
 880
 881                 case ARG_DESERIALIZE: {
 882                         int fd;
 883                         FILE *f;
 884
 885                         if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
 886                                 log_error("Failed to parse deserialize option %s.", optarg);
 887                                 return r;
 888                         }
 889
 890                         if (!(f = fdopen(fd, "r"))) {
 891                                 log_error("Failed to open serialization fd: %m");
 892                                 return r;
 893                         }
 894
 895                         if (serialization)
 896                                 fclose(serialization);
 897
 898                         serialization = f;
 899
 900                         break;
 901                 }
 902
 903                 case ARG_INTROSPECT: {
 904                         const char * const * i = NULL;
 905
 906                         for (i = bus_interface_table; *i; i += 2)
 907                                 if (!optarg || streq(i[0], optarg)) {
 908                                         fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
 909                                               "<node>\n", stdout);
 910                                         fputs(i[1], stdout);
 911                                         fputs("</node>\n", stdout);
 912
 913                                         if (optarg)
 914                                                 break;
 915                                 }
 916
 917                         if (!i[0] && optarg)
 918                                 log_error("Unknown interface %s.", optarg);
 919
 920                         arg_action = ACTION_DONE;
 921                         break;
 922                 }
 923
 924                 case 'h':
 925                         arg_action = ACTION_HELP;
 926                         break;
 927
 928                 case 'D':
 929                         log_set_max_level(LOG_DEBUG);
 930                         break;
 931
 932                 case 'b':
 933                 case 's':
 934                 case 'z':
 935                         /* Just to eat away the sysvinit kernel
 936                          * cmdline args without getopt() error
 937                          * messages that we'll parse in
 938                          * parse_proc_cmdline_word() or ignore. */
 939
 940                 case '?':
 941                 default:
 942                         if (getpid() != 1) {
 943                                 log_error("Unknown option code %c", c);
 944                                 return -EINVAL;
 945                         }
 946
 947                         break;
 948                 }
 949
 950         if (optind < argc && getpid() != 1) {
 951                 /* Hmm, when we aren't run as init system
 952                  * let's complain about excess arguments */
 953
 954                 log_error("Excess arguments.");
 955                 return -EINVAL;
 956         }
 957
 958         if (detect_container(NULL) > 0) {
 959                 char **a;
 960
 961                 /* All /proc/cmdline arguments the kernel didn't
 962                  * understand it passed to us. We're not really
 963                  * interested in that usually since /proc/cmdline is
 964                  * more interesting and complete. With one exception:
 965                  * if we are run in a container /proc/cmdline is not
 966                  * relevant for the container, hence we rely on argv[]
 967                  * instead. */
 968
 969                 for (a = argv; a < argv + argc; a++)
 970                         if ((r = parse_proc_cmdline_word(*a)) < 0)
 971                                 return r;
 972         }
 973
 974         return 0;
 975 }
 976
 977 static int help(void) {
 978
 979         printf("%s [OPTIONS...]\n\n"
 980                "Starts up and maintains the system or user services.\n\n"
 981                "  -h --help                      Show this help\n"
 982                "     --test                      Determine startup sequence, dump it and exit\n"
 983                "     --dump-configuration-items  Dump understood unit configuration items\n"
 984                "     --introspect[=INTERFACE]    Extract D-Bus interface data\n"
 985                "     --unit=UNIT                 Set default unit\n"
 986                "     --system                    Run a system instance, even if PID != 1\n"
 987                "     --user                      Run a user instance\n"
 988                "     --dump-core                 Dump core on crash\n"
 989                "     --crash-shell               Run shell on crash\n"
 990                "     --confirm-spawn             Ask for confirmation when spawning processes\n"
 991                "     --show-status[=0|1]         Show status updates on the console during bootup\n"
 992 #ifdef HAVE_SYSV_COMPAT
 993                "     --sysv-console[=0|1]        Connect output of SysV scripts to console\n"
 994 #endif
 995                "     --log-target=TARGET         Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
 996                "     --log-level=LEVEL           Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
 997                "     --log-color[=0|1]           Highlight important log messages\n"
 998                "     --log-location[=0|1]        Include code location in log messages\n"
 999                "     --default-standard-output=  Set default standard output for services\n"
1000                "     --default-standard-error=   Set default standard error output for services\n",
1001                program_invocation_short_name);
1002
1003         return 0;
1004 }
1005
1006 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
1007         FILE *f = NULL;
1008         FDSet *fds = NULL;
1009         int r;
1010
1011         assert(m);
1012         assert(_f);
1013         assert(_fds);
1014
1015         /* Make sure nothing is really destructed when we shut down */
1016         m->n_reloading ++;
1017
1018         if ((r = manager_open_serialization(m, &f)) < 0) {
1019                 log_error("Failed to create serialization file: %s", strerror(-r));
1020                 goto fail;
1021         }
1022
1023         if (!(fds = fdset_new())) {
1024                 r = -ENOMEM;
1025                 log_error("Failed to allocate fd set: %s", strerror(-r));
1026                 goto fail;
1027         }
1028
1029         if ((r = manager_serialize(m, f, fds)) < 0) {
1030                 log_error("Failed to serialize state: %s", strerror(-r));
1031                 goto fail;
1032         }
1033
1034         if (fseeko(f, 0, SEEK_SET) < 0) {
1035                 log_error("Failed to rewind serialization fd: %m");
1036                 goto fail;
1037         }
1038
1039         if ((r = fd_cloexec(fileno(f), false)) < 0) {
1040                 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1041                 goto fail;
1042         }
1043
1044         if ((r = fdset_cloexec(fds, false)) < 0) {
1045                 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1046                 goto fail;
1047         }
1048
1049         *_f = f;
1050         *_fds = fds;
1051
1052         return 0;
1053
1054 fail:
1055         fdset_free(fds);
1056
1057         if (f)
1058                 fclose(f);
1059
1060         return r;
1061 }
1062
1063 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1064         const char *e;
1065         unsigned long long a, b;
1066
1067         assert(t);
1068
1069         if (!(e = getenv("RD_TIMESTAMP")))
1070                 return NULL;
1071
1072         if (sscanf(e, "%llu %llu", &a, &b) != 2)
1073                 return NULL;
1074
1075         t->realtime = (usec_t) a;
1076         t->monotonic = (usec_t) b;
1077
1078         return t;
1079 }
1080
1081 static void test_mtab(void) {
1082         char *p;
1083
1084         /* Check that /etc/mtab is a symlink */
1085
1086         if (readlink_malloc("/etc/mtab", &p) >= 0) {
1087                 bool b;
1088
1089                 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1090                 free(p);
1091
1092                 if (b)
1093                         return;
1094         }
1095
1096         log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1097                     "This is not supported anymore. "
1098                     "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1099 }
1100
1101 static void test_usr(void) {
1102
1103         /* Check that /usr is not a separate fs */
1104
1105         if (dir_is_empty("/usr") <= 0)
1106                 return;
1107
1108         log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1109                     "Some things will probably break (sometimes even silently) in mysterious ways. "
1110                     "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1111 }
1112
1113 static void test_cgroups(void) {
1114
1115         if (access("/proc/cgroups", F_OK) >= 0)
1116                 return;
1117
1118         log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1119                     "Systems without control groups are not supported. "
1120                     "We will now sleep for 10s, and then continue boot-up. "
1121                     "Expect breakage and please do not file bugs. "
1122                     "Instead fix your kernel and enable CONFIG_CGROUPS." );
1123
1124         sleep(10);
1125 }
1126
1127 int main(int argc, char *argv[]) {
1128         Manager *m = NULL;
1129         int r, retval = EXIT_FAILURE;
1130         usec_t before_startup, after_startup;
1131         char timespan[FORMAT_TIMESPAN_MAX];
1132         FDSet *fds = NULL;
1133         bool reexecute = false;
1134         const char *shutdown_verb = NULL;
1135         dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1136         char systemd[] = "systemd";
1137         bool is_reexec = false;
1138         int j;
1139         bool loaded_policy = false;
1140
1141 #ifdef HAVE_SYSV_COMPAT
1142         if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1143                 /* This is compatibility support for SysV, where
1144                  * calling init as a user is identical to telinit. */
1145
1146                 errno = -ENOENT;
1147                 execv(SYSTEMCTL_BINARY_PATH, argv);
1148                 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1149                 return 1;
1150         }
1151 #endif
1152
1153         /* Determine if this is a reexecution or normal bootup. We do
1154          * the full command line parsing much later, so let's just
1155          * have a quick peek here. */
1156
1157         for (j = 1; j < argc; j++)
1158                 if (streq(argv[j], "--deserialize")) {
1159                         is_reexec = true;
1160                         break;
1161                 }
1162
1163         /* If we get started via the /sbin/init symlink then we are
1164            called 'init'. After a subsequent reexecution we are then
1165            called 'systemd'. That is confusing, hence let's call us
1166            systemd right-away. */
1167
1168         program_invocation_short_name = systemd;
1169         prctl(PR_SET_NAME, systemd);
1170         saved_argv = argv;
1171         saved_argc = argc;
1172
1173         log_show_color(isatty(STDERR_FILENO) > 0);
1174         log_show_location(false);
1175         log_set_max_level(LOG_INFO);
1176
1177         if (getpid() == 1) {
1178                 arg_running_as = MANAGER_SYSTEM;
1179                 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_SYSLOG_OR_KMSG);
1180
1181                 if (!is_reexec)
1182                         if (selinux_setup(&loaded_policy) < 0)
1183                                 goto finish;
1184
1185                 log_open();
1186
1187                 if (label_init() < 0)
1188                         goto finish;
1189
1190                 if (!is_reexec)
1191                         if (hwclock_is_localtime() > 0) {
1192                                 int min;
1193
1194                                 r = hwclock_apply_localtime_delta(&min);
1195                                 if (r < 0)
1196                                         log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1197                                 else
1198                                         log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1199                         }
1200
1201         } else {
1202                 arg_running_as = MANAGER_USER;
1203                 log_set_target(LOG_TARGET_AUTO);
1204                 log_open();
1205         }
1206
1207         /* Initialize default unit */
1208         if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1209                 goto finish;
1210
1211         /* By default, mount "cpu" and "cpuacct" together */
1212         arg_join_controllers = new(char**, 2);
1213         if (!arg_join_controllers)
1214                 goto finish;
1215
1216         arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1217         arg_join_controllers[1] = NULL;
1218
1219         if (!arg_join_controllers[0])
1220                 goto finish;
1221
1222         /* Mount /proc, /sys and friends, so that /proc/cmdline and
1223          * /proc/$PID/fd is available. */
1224         if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1225                 r = mount_setup(loaded_policy);
1226                 if (r < 0)
1227                         goto finish;
1228         }
1229
1230         /* Reset all signal handlers. */
1231         assert_se(reset_all_signal_handlers() == 0);
1232
1233         /* If we are init, we can block sigkill. Yay. */
1234         ignore_signals(SIGNALS_IGNORE, -1);
1235
1236         if (parse_config_file() < 0)
1237                 goto finish;
1238
1239         if (arg_running_as == MANAGER_SYSTEM)
1240                 if (parse_proc_cmdline() < 0)
1241                         goto finish;
1242
1243         log_parse_environment();
1244
1245         if (parse_argv(argc, argv) < 0)
1246                 goto finish;
1247
1248         if (arg_action == ACTION_TEST && geteuid() == 0) {
1249                 log_error("Don't run test mode as root.");
1250                 goto finish;
1251         }
1252
1253         if (arg_running_as == MANAGER_SYSTEM &&
1254             arg_action == ACTION_RUN &&
1255             running_in_chroot() > 0) {
1256                 log_error("Cannot be run in a chroot() environment.");
1257                 goto finish;
1258         }
1259
1260         if (arg_action == ACTION_HELP) {
1261                 retval = help();
1262                 goto finish;
1263         } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1264                 unit_dump_config_items(stdout);
1265                 retval = EXIT_SUCCESS;
1266                 goto finish;
1267         } else if (arg_action == ACTION_DONE) {
1268                 retval = EXIT_SUCCESS;
1269                 goto finish;
1270         }
1271
1272         assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1273
1274         /* Close logging fds, in order not to confuse fdset below */
1275         log_close();
1276
1277         /* Remember open file descriptors for later deserialization */
1278         if (serialization) {
1279                 if ((r = fdset_new_fill(&fds)) < 0) {
1280                         log_error("Failed to allocate fd set: %s", strerror(-r));
1281                         goto finish;
1282                 }
1283
1284                 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1285         } else
1286                 close_all_fds(NULL, 0);
1287
1288         /* Set up PATH unless it is already set */
1289         setenv("PATH",
1290                "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1291                arg_running_as == MANAGER_SYSTEM);
1292
1293         if (arg_running_as == MANAGER_SYSTEM) {
1294                 /* Parse the data passed to us by the initrd and unset it */
1295                 parse_initrd_timestamp(&initrd_timestamp);
1296                 filter_environ("RD_");
1297
1298                 /* Unset some environment variables passed in from the
1299                  * kernel that don't really make sense for us. */
1300                 unsetenv("HOME");
1301                 unsetenv("TERM");
1302
1303                 /* All other variables are left as is, so that clients
1304                  * can still read them via /proc/1/environ */
1305         }
1306
1307         /* Move out of the way, so that we won't block unmounts */
1308         assert_se(chdir("/")  == 0);
1309
1310         if (arg_running_as == MANAGER_SYSTEM) {
1311                 /* Become a session leader if we aren't one yet. */
1312                 setsid();
1313
1314                 /* Disable the umask logic */
1315                 umask(0);
1316         }
1317
1318         /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1319         dbus_connection_set_change_sigpipe(FALSE);
1320
1321         /* Reset the console, but only if this is really init and we
1322          * are freshly booted */
1323         if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1324                 console_setup(getpid() == 1 && !is_reexec);
1325                 make_null_stdio();
1326         }
1327
1328         /* Open the logging devices, if possible and necessary */
1329         log_open();
1330
1331         /* Make sure we leave a core dump without panicing the
1332          * kernel. */
1333         if (getpid() == 1)
1334                 install_crash_handler();
1335
1336         if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1337                 r = mount_cgroup_controllers(arg_join_controllers);
1338                 if (r < 0)
1339                         goto finish;
1340         }
1341
1342         log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1343                  PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1344
1345         if (arg_running_as == MANAGER_SYSTEM && !is_reexec) {
1346                 locale_setup();
1347
1348                 if (arg_show_status || plymouth_running())
1349                         status_welcome();
1350
1351                 kmod_setup();
1352                 hostname_setup();
1353                 machine_id_setup();
1354                 loopback_setup();
1355
1356                 test_mtab();
1357                 test_usr();
1358                 test_cgroups();
1359         }
1360
1361         if ((r = manager_new(arg_running_as, &m)) < 0) {
1362                 log_error("Failed to allocate manager object: %s", strerror(-r));
1363                 goto finish;
1364         }
1365
1366         m->confirm_spawn = arg_confirm_spawn;
1367         m->show_status = arg_show_status;
1368 #ifdef HAVE_SYSV_COMPAT
1369         m->sysv_console = arg_sysv_console;
1370 #endif
1371         m->mount_auto = arg_mount_auto;
1372         m->swap_auto = arg_swap_auto;
1373         m->default_std_output = arg_default_std_output;
1374         m->default_std_error = arg_default_std_error;
1375
1376         if (dual_timestamp_is_set(&initrd_timestamp))
1377                 m->initrd_timestamp = initrd_timestamp;
1378
1379         if (arg_default_controllers)
1380                 manager_set_default_controllers(m, arg_default_controllers);
1381
1382         before_startup = now(CLOCK_MONOTONIC);
1383
1384         if ((r = manager_startup(m, serialization, fds)) < 0)
1385                 log_error("Failed to fully start up daemon: %s", strerror(-r));
1386
1387         if (fds) {
1388                 /* This will close all file descriptors that were opened, but
1389                  * not claimed by any unit. */
1390
1391                 fdset_free(fds);
1392                 fds = NULL;
1393         }
1394
1395         if (serialization) {
1396                 fclose(serialization);
1397                 serialization = NULL;
1398         } else {
1399                 DBusError error;
1400                 Unit *target = NULL;
1401
1402                 dbus_error_init(&error);
1403
1404                 log_debug("Activating default unit: %s", arg_default_unit);
1405
1406                 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1407                         log_error("Failed to load default target: %s", bus_error(&error, r));
1408                         dbus_error_free(&error);
1409                 } else if (target->meta.load_state == UNIT_ERROR)
1410                         log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
1411                 else if (target->meta.load_state == UNIT_MASKED)
1412                         log_error("Default target masked.");
1413
1414                 if (!target || target->meta.load_state != UNIT_LOADED) {
1415                         log_info("Trying to load rescue target...");
1416
1417                         if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1418                                 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1419                                 dbus_error_free(&error);
1420                                 goto finish;
1421                         } else if (target->meta.load_state == UNIT_ERROR) {
1422                                 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1423                                 goto finish;
1424                         } else if (target->meta.load_state == UNIT_MASKED) {
1425                                 log_error("Rescue target masked.");
1426                                 goto finish;
1427                         }
1428                 }
1429
1430                 assert(target->meta.load_state == UNIT_LOADED);
1431
1432                 if (arg_action == ACTION_TEST) {
1433                         printf("-> By units:\n");
1434                         manager_dump_units(m, stdout, "\t");
1435                 }
1436
1437                 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
1438                         log_error("Failed to start default target: %s", bus_error(&error, r));
1439                         dbus_error_free(&error);
1440                         goto finish;
1441                 }
1442
1443                 after_startup = now(CLOCK_MONOTONIC);
1444                 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1445                          "Loaded units and determined initial transaction in %s.",
1446                           format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1447
1448                 if (arg_action == ACTION_TEST) {
1449                         printf("-> By jobs:\n");
1450                         manager_dump_jobs(m, stdout, "\t");
1451                         retval = EXIT_SUCCESS;
1452                         goto finish;
1453                 }
1454         }
1455
1456         for (;;) {
1457                 if ((r = manager_loop(m)) < 0) {
1458                         log_error("Failed to run mainloop: %s", strerror(-r));
1459                         goto finish;
1460                 }
1461
1462                 switch (m->exit_code) {
1463
1464                 case MANAGER_EXIT:
1465                         retval = EXIT_SUCCESS;
1466                         log_debug("Exit.");
1467                         goto finish;
1468
1469                 case MANAGER_RELOAD:
1470                         log_info("Reloading.");
1471                         if ((r = manager_reload(m)) < 0)
1472                                 log_error("Failed to reload: %s", strerror(-r));
1473                         break;
1474
1475                 case MANAGER_REEXECUTE:
1476                         if (prepare_reexecute(m, &serialization, &fds) < 0)
1477                                 goto finish;
1478
1479                         reexecute = true;
1480                         log_notice("Reexecuting.");
1481                         goto finish;
1482
1483                 case MANAGER_REBOOT:
1484                 case MANAGER_POWEROFF:
1485                 case MANAGER_HALT:
1486                 case MANAGER_KEXEC: {
1487                         static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1488                                 [MANAGER_REBOOT] = "reboot",
1489                                 [MANAGER_POWEROFF] = "poweroff",
1490                                 [MANAGER_HALT] = "halt",
1491                                 [MANAGER_KEXEC] = "kexec"
1492                         };
1493
1494                         assert_se(shutdown_verb = table[m->exit_code]);
1495
1496                         log_notice("Shutting down.");
1497                         goto finish;
1498                 }
1499
1500                 default:
1501                         assert_not_reached("Unknown exit code.");
1502                 }
1503         }
1504
1505 finish:
1506         if (m)
1507                 manager_free(m);
1508
1509         free(arg_default_unit);
1510         strv_free(arg_default_controllers);
1511         free_join_controllers();
1512
1513         dbus_shutdown();
1514
1515         label_finish();
1516
1517         if (reexecute) {
1518                 const char *args[15];
1519                 unsigned i = 0;
1520                 char sfd[16];
1521
1522                 assert(serialization);
1523                 assert(fds);
1524
1525                 args[i++] = SYSTEMD_BINARY_PATH;
1526
1527                 args[i++] = "--log-level";
1528                 args[i++] = log_level_to_string(log_get_max_level());
1529
1530                 args[i++] = "--log-target";
1531                 args[i++] = log_target_to_string(log_get_target());
1532
1533                 if (arg_running_as == MANAGER_SYSTEM)
1534                         args[i++] = "--system";
1535                 else
1536                         args[i++] = "--user";
1537
1538                 if (arg_dump_core)
1539                         args[i++] = "--dump-core";
1540
1541                 if (arg_crash_shell)
1542                         args[i++] = "--crash-shell";
1543
1544                 if (arg_confirm_spawn)
1545                         args[i++] = "--confirm-spawn";
1546
1547                 if (arg_show_status)
1548                         args[i++] = "--show-status=1";
1549                 else
1550                         args[i++] = "--show-status=0";
1551
1552 #ifdef HAVE_SYSV_COMPAT
1553                 if (arg_sysv_console)
1554                         args[i++] = "--sysv-console=1";
1555                 else
1556                         args[i++] = "--sysv-console=0";
1557 #endif
1558
1559                 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1560                 char_array_0(sfd);
1561
1562                 args[i++] = "--deserialize";
1563                 args[i++] = sfd;
1564
1565                 args[i++] = NULL;
1566
1567                 assert(i <= ELEMENTSOF(args));
1568
1569                 execv(args[0], (char* const*) args);
1570
1571                 log_error("Failed to reexecute: %m");
1572         }
1573
1574         if (serialization)
1575                 fclose(serialization);
1576
1577         if (fds)
1578                 fdset_free(fds);
1579
1580         if (shutdown_verb) {
1581                 const char * command_line[] = {
1582                         SYSTEMD_SHUTDOWN_BINARY_PATH,
1583                         shutdown_verb,
1584                         NULL
1585                 };
1586
1587                 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1588                 log_error("Failed to execute shutdown binary, freezing: %m");
1589         }
1590
1591         if (getpid() == 1)
1592                 freeze();
1593
1594         return retval;
1595 }