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 #include "virt.h"
  56
  57 static enum {
  58         ACTION_RUN,
  59         ACTION_HELP,
  60         ACTION_TEST,
  61         ACTION_DUMP_CONFIGURATION_ITEMS,
  62         ACTION_DONE
  63 } arg_action = ACTION_RUN;
  64
  65 static char *arg_default_unit = NULL;
  66 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
  67
  68 static bool arg_dump_core = true;
  69 static bool arg_crash_shell = false;
  70 static int arg_crash_chvt = -1;
  71 static bool arg_confirm_spawn = false;
  72 static bool arg_show_status = true;
  73 #ifdef HAVE_SYSV_COMPAT
  74 static bool arg_sysv_console = true;
  75 #endif
  76 static bool arg_mount_auto = true;
  77 static bool arg_swap_auto = true;
  78 static char **arg_default_controllers = NULL;
  79 static char ***arg_join_controllers = NULL;
  80 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
  81 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
  82
  83 static FILE* serialization = NULL;
  84
  85 static void nop_handler(int sig) {
  86 }
  87
  88 _noreturn_ static void crash(int sig) {
  89
  90         if (!arg_dump_core)
  91                 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
  92         else {
  93                 struct sigaction sa;
  94                 pid_t pid;
  95
  96                 /* We want to wait for the core process, hence let's enable SIGCHLD */
  97                 zero(sa);
  98                 sa.sa_handler = nop_handler;
  99                 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
 100                 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
 101
 102                 if ((pid = fork()) < 0)
 103                         log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
 104
 105                 else if (pid == 0) {
 106                         struct rlimit rl;
 107
 108                         /* Enable default signal handler for core dump */
 109                         zero(sa);
 110                         sa.sa_handler = SIG_DFL;
 111                         assert_se(sigaction(sig, &sa, NULL) == 0);
 112
 113                         /* Don't limit the core dump size */
 114                         zero(rl);
 115                         rl.rlim_cur = RLIM_INFINITY;
 116                         rl.rlim_max = RLIM_INFINITY;
 117                         setrlimit(RLIMIT_CORE, &rl);
 118
 119                         /* Just to be sure... */
 120                         assert_se(chdir("/") == 0);
 121
 122                         /* Raise the signal again */
 123                         raise(sig);
 124
 125                         assert_not_reached("We shouldn't be here...");
 126                         _exit(1);
 127
 128                 } else {
 129                         siginfo_t status;
 130                         int r;
 131
 132                         /* Order things nicely. */
 133                         if ((r = wait_for_terminate(pid, &status)) < 0)
 134                                 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
 135                         else if (status.si_code != CLD_DUMPED)
 136                                 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
 137                         else
 138                                 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
 139                 }
 140         }
 141
 142         if (arg_crash_chvt)
 143                 chvt(arg_crash_chvt);
 144
 145         if (arg_crash_shell) {
 146                 struct sigaction sa;
 147                 pid_t pid;
 148
 149                 log_info("Executing crash shell in 10s...");
 150                 sleep(10);
 151
 152                 /* Let the kernel reap children for us */
 153                 zero(sa);
 154                 sa.sa_handler = SIG_IGN;
 155                 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
 156                 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
 157
 158                 if ((pid = fork()) < 0)
 159                         log_error("Failed to fork off crash shell: %s", strerror(errno));
 160                 else if (pid == 0) {
 161                         int fd, r;
 162
 163                         if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
 164                                 log_error("Failed to acquire terminal: %s", strerror(-fd));
 165                         else if ((r = make_stdio(fd)) < 0)
 166                                 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
 167
 168                         execl("/bin/sh", "/bin/sh", NULL);
 169
 170                         log_error("execl() failed: %s", strerror(errno));
 171                         _exit(1);
 172                 }
 173
 174                 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
 175         }
 176
 177         log_info("Freezing execution.");
 178         freeze();
 179 }
 180
 181 static void install_crash_handler(void) {
 182         struct sigaction sa;
 183
 184         zero(sa);
 185
 186         sa.sa_handler = crash;
 187         sa.sa_flags = SA_NODEFER;
 188
 189         sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
 190 }
 191
 192 static int console_setup(bool do_reset) {
 193         int tty_fd, r;
 194
 195         /* If we are init, we connect stdin/stdout/stderr to /dev/null
 196          * and make sure we don't have a controlling tty. */
 197
 198         release_terminal();
 199
 200         if (!do_reset)
 201                 return 0;
 202
 203         tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
 204         if (tty_fd < 0) {
 205                 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
 206                 return -tty_fd;
 207         }
 208
 209         /* We don't want to force text mode.
 210          * plymouth may be showing pictures already from initrd. */
 211         r = reset_terminal_fd(tty_fd, false);
 212         if (r < 0)
 213                 log_error("Failed to reset /dev/console: %s", strerror(-r));
 214
 215         close_nointr_nofail(tty_fd);
 216         return r;
 217 }
 218
 219 static int set_default_unit(const char *u) {
 220         char *c;
 221
 222         assert(u);
 223
 224         if (!(c = strdup(u)))
 225                 return -ENOMEM;
 226
 227         free(arg_default_unit);
 228         arg_default_unit = c;
 229         return 0;
 230 }
 231
 232 static int parse_proc_cmdline_word(const char *word) {
 233
 234         static const char * const rlmap[] = {
 235                 "emergency", SPECIAL_EMERGENCY_TARGET,
 236                 "-b",        SPECIAL_EMERGENCY_TARGET,
 237                 "single",    SPECIAL_RESCUE_TARGET,
 238                 "-s",        SPECIAL_RESCUE_TARGET,
 239                 "s",         SPECIAL_RESCUE_TARGET,
 240                 "S",         SPECIAL_RESCUE_TARGET,
 241                 "1",         SPECIAL_RESCUE_TARGET,
 242                 "2",         SPECIAL_RUNLEVEL2_TARGET,
 243                 "3",         SPECIAL_RUNLEVEL3_TARGET,
 244                 "4",         SPECIAL_RUNLEVEL4_TARGET,
 245                 "5",         SPECIAL_RUNLEVEL5_TARGET,
 246         };
 247
 248         assert(word);
 249
 250         if (startswith(word, "systemd.unit="))
 251                 return set_default_unit(word + 13);
 252
 253         else if (startswith(word, "systemd.log_target=")) {
 254
 255                 if (log_set_target_from_string(word + 19) < 0)
 256                         log_warning("Failed to parse log target %s. Ignoring.", word + 19);
 257
 258         } else if (startswith(word, "systemd.log_level=")) {
 259
 260                 if (log_set_max_level_from_string(word + 18) < 0)
 261                         log_warning("Failed to parse log level %s. Ignoring.", word + 18);
 262
 263         } else if (startswith(word, "systemd.log_color=")) {
 264
 265                 if (log_show_color_from_string(word + 18) < 0)
 266                         log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
 267
 268         } else if (startswith(word, "systemd.log_location=")) {
 269
 270                 if (log_show_location_from_string(word + 21) < 0)
 271                         log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
 272
 273         } else if (startswith(word, "systemd.dump_core=")) {
 274                 int r;
 275
 276                 if ((r = parse_boolean(word + 18)) < 0)
 277                         log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
 278                 else
 279                         arg_dump_core = r;
 280
 281         } else if (startswith(word, "systemd.crash_shell=")) {
 282                 int r;
 283
 284                 if ((r = parse_boolean(word + 20)) < 0)
 285                         log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
 286                 else
 287                         arg_crash_shell = r;
 288
 289         } else if (startswith(word, "systemd.confirm_spawn=")) {
 290                 int r;
 291
 292                 if ((r = parse_boolean(word + 22)) < 0)
 293                         log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
 294                 else
 295                         arg_confirm_spawn = r;
 296
 297         } else if (startswith(word, "systemd.crash_chvt=")) {
 298                 int k;
 299
 300                 if (safe_atoi(word + 19, &k) < 0)
 301                         log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
 302                 else
 303                         arg_crash_chvt = k;
 304
 305         } else if (startswith(word, "systemd.show_status=")) {
 306                 int r;
 307
 308                 if ((r = parse_boolean(word + 20)) < 0)
 309                         log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
 310                 else
 311                         arg_show_status = r;
 312         } else if (startswith(word, "systemd.default_standard_output=")) {
 313                 int r;
 314
 315                 if ((r = exec_output_from_string(word + 32)) < 0)
 316                         log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
 317                 else
 318                         arg_default_std_output = r;
 319         } else if (startswith(word, "systemd.default_standard_error=")) {
 320                 int r;
 321
 322                 if ((r = exec_output_from_string(word + 31)) < 0)
 323                         log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
 324                 else
 325                         arg_default_std_error = r;
 326         } else if (startswith(word, "systemd.setenv=")) {
 327                 char *cenv, *eq;
 328                 int r;
 329
 330                 cenv = strdup(word + 15);
 331                 if (!cenv)
 332                         return -ENOMEM;
 333
 334                 eq = strchr(cenv, '=');
 335                 if (!eq) {
 336                         r = unsetenv(cenv);
 337                         if (r < 0)
 338                                 log_warning("unsetenv failed %s. Ignoring.", strerror(errno));
 339                 } else {
 340                         *eq = 0;
 341                         r = setenv(cenv, eq + 1, 1);
 342                         if (r < 0)
 343                                 log_warning("setenv failed %s. Ignoring.", strerror(errno));
 344                 }
 345                 free(cenv);
 346 #ifdef HAVE_SYSV_COMPAT
 347         } else if (startswith(word, "systemd.sysv_console=")) {
 348                 int r;
 349
 350                 if ((r = parse_boolean(word + 21)) < 0)
 351                         log_warning("Failed to parse SysV console switch %s. Ignoring.", word + 20);
 352                 else
 353                         arg_sysv_console = r;
 354 #endif
 355
 356         } else if (startswith(word, "systemd.")) {
 357
 358                 log_warning("Unknown kernel switch %s. Ignoring.", word);
 359
 360                 log_info("Supported kernel switches:\n"
 361                          "systemd.unit=UNIT                        Default unit to start\n"
 362                          "systemd.dump_core=0|1                    Dump core on crash\n"
 363                          "systemd.crash_shell=0|1                  Run shell on crash\n"
 364                          "systemd.crash_chvt=N                     Change to VT #N on crash\n"
 365                          "systemd.confirm_spawn=0|1                Confirm every process spawn\n"
 366                          "systemd.show_status=0|1                  Show status updates on the console during bootup\n"
 367 #ifdef HAVE_SYSV_COMPAT
 368                          "systemd.sysv_console=0|1                 Connect output of SysV scripts to console\n"
 369 #endif
 370                          "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
 371                          "                                         Log target\n"
 372                          "systemd.log_level=LEVEL                  Log level\n"
 373                          "systemd.log_color=0|1                    Highlight important log messages\n"
 374                          "systemd.log_location=0|1                 Include code location in log messages\n"
 375                          "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
 376                          "                                         Set default log output for services\n"
 377                          "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
 378                          "                                         Set default log error output for services\n");
 379
 380         } else if (streq(word, "quiet")) {
 381                 arg_show_status = false;
 382 #ifdef HAVE_SYSV_COMPAT
 383                 arg_sysv_console = false;
 384 #endif
 385         } else {
 386                 unsigned i;
 387
 388                 /* SysV compatibility */
 389                 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
 390                         if (streq(word, rlmap[i]))
 391                                 return set_default_unit(rlmap[i+1]);
 392         }
 393
 394         return 0;
 395 }
 396
 397 static int config_parse_level2(
 398                 const char *filename,
 399                 unsigned line,
 400                 const char *section,
 401                 const char *lvalue,
 402                 int ltype,
 403                 const char *rvalue,
 404                 void *data,
 405                 void *userdata) {
 406
 407         assert(filename);
 408         assert(lvalue);
 409         assert(rvalue);
 410
 411         log_set_max_level_from_string(rvalue);
 412         return 0;
 413 }
 414
 415 static int config_parse_target(
 416                 const char *filename,
 417                 unsigned line,
 418                 const char *section,
 419                 const char *lvalue,
 420                 int ltype,
 421                 const char *rvalue,
 422                 void *data,
 423                 void *userdata) {
 424
 425         assert(filename);
 426         assert(lvalue);
 427         assert(rvalue);
 428
 429         log_set_target_from_string(rvalue);
 430         return 0;
 431 }
 432
 433 static int config_parse_color(
 434                 const char *filename,
 435                 unsigned line,
 436                 const char *section,
 437                 const char *lvalue,
 438                 int ltype,
 439                 const char *rvalue,
 440                 void *data,
 441                 void *userdata) {
 442
 443         assert(filename);
 444         assert(lvalue);
 445         assert(rvalue);
 446
 447         log_show_color_from_string(rvalue);
 448         return 0;
 449 }
 450
 451 static int config_parse_location(
 452                 const char *filename,
 453                 unsigned line,
 454                 const char *section,
 455                 const char *lvalue,
 456                 int ltype,
 457                 const char *rvalue,
 458                 void *data,
 459                 void *userdata) {
 460
 461         assert(filename);
 462         assert(lvalue);
 463         assert(rvalue);
 464
 465         log_show_location_from_string(rvalue);
 466         return 0;
 467 }
 468
 469 static int config_parse_cpu_affinity2(
 470                 const char *filename,
 471                 unsigned line,
 472                 const char *section,
 473                 const char *lvalue,
 474                 int ltype,
 475                 const char *rvalue,
 476                 void *data,
 477                 void *userdata) {
 478
 479         char *w;
 480         size_t l;
 481         char *state;
 482         cpu_set_t *c = NULL;
 483         unsigned ncpus = 0;
 484
 485         assert(filename);
 486         assert(lvalue);
 487         assert(rvalue);
 488
 489         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 490                 char *t;
 491                 int r;
 492                 unsigned cpu;
 493
 494                 if (!(t = strndup(w, l)))
 495                         return -ENOMEM;
 496
 497                 r = safe_atou(t, &cpu);
 498                 free(t);
 499
 500                 if (!c)
 501                         if (!(c = cpu_set_malloc(&ncpus)))
 502                                 return -ENOMEM;
 503
 504                 if (r < 0 || cpu >= ncpus) {
 505                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 506                         CPU_FREE(c);
 507                         return -EBADMSG;
 508                 }
 509
 510                 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
 511         }
 512
 513         if (c) {
 514                 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
 515                         log_warning("Failed to set CPU affinity: %m");
 516
 517                 CPU_FREE(c);
 518         }
 519
 520         return 0;
 521 }
 522
 523 static void strv_free_free(char ***l) {
 524         char ***i;
 525
 526         if (!l)
 527                 return;
 528
 529         for (i = l; *i; i++)
 530                 strv_free(*i);
 531
 532         free(l);
 533 }
 534
 535 static void free_join_controllers(void) {
 536         if (!arg_join_controllers)
 537                 return;
 538
 539         strv_free_free(arg_join_controllers);
 540         arg_join_controllers = NULL;
 541 }
 542
 543 static int config_parse_join_controllers(
 544                 const char *filename,
 545                 unsigned line,
 546                 const char *section,
 547                 const char *lvalue,
 548                 int ltype,
 549                 const char *rvalue,
 550                 void *data,
 551                 void *userdata) {
 552
 553         unsigned n = 0;
 554         char *state, *w;
 555         size_t length;
 556
 557         assert(filename);
 558         assert(lvalue);
 559         assert(rvalue);
 560
 561         free_join_controllers();
 562
 563         FOREACH_WORD_QUOTED(w, length, rvalue, state) {
 564                 char *s, **l;
 565
 566                 s = strndup(w, length);
 567                 if (!s)
 568                         return -ENOMEM;
 569
 570                 l = strv_split(s, ",");
 571                 free(s);
 572
 573                 strv_uniq(l);
 574
 575                 if (strv_length(l) <= 1) {
 576                         strv_free(l);
 577                         continue;
 578                 }
 579
 580                 if (!arg_join_controllers) {
 581                         arg_join_controllers = new(char**, 2);
 582                         if (!arg_join_controllers) {
 583                                 strv_free(l);
 584                                 return -ENOMEM;
 585                         }
 586
 587                         arg_join_controllers[0] = l;
 588                         arg_join_controllers[1] = NULL;
 589
 590                         n = 1;
 591                 } else {
 592                         char ***a;
 593                         char ***t;
 594
 595                         t = new0(char**, n+2);
 596                         if (!t) {
 597                                 strv_free(l);
 598                                 return -ENOMEM;
 599                         }
 600
 601                         n = 0;
 602
 603                         for (a = arg_join_controllers; *a; a++) {
 604
 605                                 if (strv_overlap(*a, l)) {
 606                                         char **c;
 607
 608                                         c = strv_merge(*a, l);
 609                                         if (!c) {
 610                                                 strv_free(l);
 611                                                 strv_free_free(t);
 612                                                 return -ENOMEM;
 613                                         }
 614
 615                                         strv_free(l);
 616                                         l = c;
 617                                 } else {
 618                                         char **c;
 619
 620                                         c = strv_copy(*a);
 621                                         if (!c) {
 622                                                 strv_free(l);
 623                                                 strv_free_free(t);
 624                                                 return -ENOMEM;
 625                                         }
 626
 627                                         t[n++] = c;
 628                                 }
 629                         }
 630
 631                         t[n++] = strv_uniq(l);
 632
 633                         strv_free_free(arg_join_controllers);
 634                         arg_join_controllers = t;
 635                 }
 636         }
 637
 638         return 0;
 639 }
 640
 641 static int parse_config_file(void) {
 642
 643         const ConfigTableItem items[] = {
 644                 { "Manager", "LogLevel",              config_parse_level2,       0, NULL                     },
 645                 { "Manager", "LogTarget",             config_parse_target,       0, NULL                     },
 646                 { "Manager", "LogColor",              config_parse_color,        0, NULL                     },
 647                 { "Manager", "LogLocation",           config_parse_location,     0, NULL                     },
 648                 { "Manager", "DumpCore",              config_parse_bool,         0, &arg_dump_core           },
 649                 { "Manager", "CrashShell",            config_parse_bool,         0, &arg_crash_shell         },
 650                 { "Manager", "ShowStatus",            config_parse_bool,         0, &arg_show_status         },
 651 #ifdef HAVE_SYSV_COMPAT
 652                 { "Manager", "SysVConsole",           config_parse_bool,         0, &arg_sysv_console        },
 653 #endif
 654                 { "Manager", "CrashChVT",             config_parse_int,          0, &arg_crash_chvt          },
 655                 { "Manager", "CPUAffinity",           config_parse_cpu_affinity2, 0, NULL                    },
 656                 { "Manager", "MountAuto",             config_parse_bool,         0, &arg_mount_auto          },
 657                 { "Manager", "SwapAuto",              config_parse_bool,         0, &arg_swap_auto           },
 658                 { "Manager", "DefaultControllers",    config_parse_strv,         0, &arg_default_controllers },
 659                 { "Manager", "DefaultStandardOutput", config_parse_output,       0, &arg_default_std_output  },
 660                 { "Manager", "DefaultStandardError",  config_parse_output,       0, &arg_default_std_error   },
 661                 { "Manager", "JoinControllers",       config_parse_join_controllers, 0, &arg_join_controllers },
 662                 { NULL, NULL, NULL, 0, NULL }
 663         };
 664
 665         FILE *f;
 666         const char *fn;
 667         int r;
 668
 669         fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
 670         f = fopen(fn, "re");
 671         if (!f) {
 672                 if (errno == ENOENT)
 673                         return 0;
 674
 675                 log_warning("Failed to open configuration file '%s': %m", fn);
 676                 return 0;
 677         }
 678
 679         r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
 680         if (r < 0)
 681                 log_warning("Failed to parse configuration file: %s", strerror(-r));
 682
 683         fclose(f);
 684
 685         return 0;
 686 }
 687
 688 static int parse_proc_cmdline(void) {
 689         char *line, *w, *state;
 690         int r;
 691         size_t l;
 692
 693         /* Don't read /proc/cmdline if we are in a container, since
 694          * that is only relevant for the host system */
 695         if (detect_container(NULL) > 0)
 696                 return 0;
 697
 698         if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
 699                 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
 700                 return 0;
 701         }
 702
 703         FOREACH_WORD_QUOTED(w, l, line, state) {
 704                 char *word;
 705
 706                 if (!(word = strndup(w, l))) {
 707                         r = -ENOMEM;
 708                         goto finish;
 709                 }
 710
 711                 r = parse_proc_cmdline_word(word);
 712                 free(word);
 713
 714                 if (r < 0)
 715                         goto finish;
 716         }
 717
 718         r = 0;
 719
 720 finish:
 721         free(line);
 722         return r;
 723 }
 724
 725 static int parse_argv(int argc, char *argv[]) {
 726
 727         enum {
 728                 ARG_LOG_LEVEL = 0x100,
 729                 ARG_LOG_TARGET,
 730                 ARG_LOG_COLOR,
 731                 ARG_LOG_LOCATION,
 732                 ARG_UNIT,
 733                 ARG_SYSTEM,
 734                 ARG_USER,
 735                 ARG_TEST,
 736                 ARG_DUMP_CONFIGURATION_ITEMS,
 737                 ARG_DUMP_CORE,
 738                 ARG_CRASH_SHELL,
 739                 ARG_CONFIRM_SPAWN,
 740                 ARG_SHOW_STATUS,
 741                 ARG_SYSV_CONSOLE,
 742                 ARG_DESERIALIZE,
 743                 ARG_INTROSPECT,
 744                 ARG_DEFAULT_STD_OUTPUT,
 745                 ARG_DEFAULT_STD_ERROR
 746         };
 747
 748         static const struct option options[] = {
 749                 { "log-level",                required_argument, NULL, ARG_LOG_LEVEL                },
 750                 { "log-target",               required_argument, NULL, ARG_LOG_TARGET               },
 751                 { "log-color",                optional_argument, NULL, ARG_LOG_COLOR                },
 752                 { "log-location",             optional_argument, NULL, ARG_LOG_LOCATION             },
 753                 { "unit",                     required_argument, NULL, ARG_UNIT                     },
 754                 { "system",                   no_argument,       NULL, ARG_SYSTEM                   },
 755                 { "user",                     no_argument,       NULL, ARG_USER                     },
 756                 { "test",                     no_argument,       NULL, ARG_TEST                     },
 757                 { "help",                     no_argument,       NULL, 'h'                          },
 758                 { "dump-configuration-items", no_argument,       NULL, ARG_DUMP_CONFIGURATION_ITEMS },
 759                 { "dump-core",                no_argument,       NULL, ARG_DUMP_CORE                },
 760                 { "crash-shell",              no_argument,       NULL, ARG_CRASH_SHELL              },
 761                 { "confirm-spawn",            no_argument,       NULL, ARG_CONFIRM_SPAWN            },
 762                 { "show-status",              optional_argument, NULL, ARG_SHOW_STATUS              },
 763 #ifdef HAVE_SYSV_COMPAT
 764                 { "sysv-console",             optional_argument, NULL, ARG_SYSV_CONSOLE             },
 765 #endif
 766                 { "deserialize",              required_argument, NULL, ARG_DESERIALIZE              },
 767                 { "introspect",               optional_argument, NULL, ARG_INTROSPECT               },
 768                 { "default-standard-output",  required_argument, NULL, ARG_DEFAULT_STD_OUTPUT,      },
 769                 { "default-standard-error",   required_argument, NULL, ARG_DEFAULT_STD_ERROR,       },
 770                 { NULL,                       0,                 NULL, 0                            }
 771         };
 772
 773         int c, r;
 774
 775         assert(argc >= 1);
 776         assert(argv);
 777
 778         if (getpid() == 1)
 779                 opterr = 0;
 780
 781         while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
 782
 783                 switch (c) {
 784
 785                 case ARG_LOG_LEVEL:
 786                         if ((r = log_set_max_level_from_string(optarg)) < 0) {
 787                                 log_error("Failed to parse log level %s.", optarg);
 788                                 return r;
 789                         }
 790
 791                         break;
 792
 793                 case ARG_LOG_TARGET:
 794
 795                         if ((r = log_set_target_from_string(optarg)) < 0) {
 796                                 log_error("Failed to parse log target %s.", optarg);
 797                                 return r;
 798                         }
 799
 800                         break;
 801
 802                 case ARG_LOG_COLOR:
 803
 804                         if (optarg) {
 805                                 if ((r = log_show_color_from_string(optarg)) < 0) {
 806                                         log_error("Failed to parse log color setting %s.", optarg);
 807                                         return r;
 808                                 }
 809                         } else
 810                                 log_show_color(true);
 811
 812                         break;
 813
 814                 case ARG_LOG_LOCATION:
 815
 816                         if (optarg) {
 817                                 if ((r = log_show_location_from_string(optarg)) < 0) {
 818                                         log_error("Failed to parse log location setting %s.", optarg);
 819                                         return r;
 820                                 }
 821                         } else
 822                                 log_show_location(true);
 823
 824                         break;
 825
 826                 case ARG_DEFAULT_STD_OUTPUT:
 827
 828                         if ((r = exec_output_from_string(optarg)) < 0) {
 829                                 log_error("Failed to parse default standard output setting %s.", optarg);
 830                                 return r;
 831                         } else
 832                                 arg_default_std_output = r;
 833                         break;
 834
 835                 case ARG_DEFAULT_STD_ERROR:
 836
 837                         if ((r = exec_output_from_string(optarg)) < 0) {
 838                                 log_error("Failed to parse default standard error output setting %s.", optarg);
 839                                 return r;
 840                         } else
 841                                 arg_default_std_error = r;
 842                         break;
 843
 844                 case ARG_UNIT:
 845
 846                         if ((r = set_default_unit(optarg)) < 0) {
 847                                 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
 848                                 return r;
 849                         }
 850
 851                         break;
 852
 853                 case ARG_SYSTEM:
 854                         arg_running_as = MANAGER_SYSTEM;
 855                         break;
 856
 857                 case ARG_USER:
 858                         arg_running_as = MANAGER_USER;
 859                         break;
 860
 861                 case ARG_TEST:
 862                         arg_action = ACTION_TEST;
 863                         break;
 864
 865                 case ARG_DUMP_CONFIGURATION_ITEMS:
 866                         arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
 867                         break;
 868
 869                 case ARG_DUMP_CORE:
 870                         arg_dump_core = true;
 871                         break;
 872
 873                 case ARG_CRASH_SHELL:
 874                         arg_crash_shell = true;
 875                         break;
 876
 877                 case ARG_CONFIRM_SPAWN:
 878                         arg_confirm_spawn = true;
 879                         break;
 880
 881                 case ARG_SHOW_STATUS:
 882
 883                         if (optarg) {
 884                                 if ((r = parse_boolean(optarg)) < 0) {
 885                                         log_error("Failed to show status boolean %s.", optarg);
 886                                         return r;
 887                                 }
 888                                 arg_show_status = r;
 889                         } else
 890                                 arg_show_status = true;
 891                         break;
 892 #ifdef HAVE_SYSV_COMPAT
 893                 case ARG_SYSV_CONSOLE:
 894
 895                         if (optarg) {
 896                                 if ((r = parse_boolean(optarg)) < 0) {
 897                                         log_error("Failed to SysV console boolean %s.", optarg);
 898                                         return r;
 899                                 }
 900                                 arg_sysv_console = r;
 901                         } else
 902                                 arg_sysv_console = true;
 903                         break;
 904 #endif
 905
 906                 case ARG_DESERIALIZE: {
 907                         int fd;
 908                         FILE *f;
 909
 910                         if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
 911                                 log_error("Failed to parse deserialize option %s.", optarg);
 912                                 return r;
 913                         }
 914
 915                         if (!(f = fdopen(fd, "r"))) {
 916                                 log_error("Failed to open serialization fd: %m");
 917                                 return r;
 918                         }
 919
 920                         if (serialization)
 921                                 fclose(serialization);
 922
 923                         serialization = f;
 924
 925                         break;
 926                 }
 927
 928                 case ARG_INTROSPECT: {
 929                         const char * const * i = NULL;
 930
 931                         for (i = bus_interface_table; *i; i += 2)
 932                                 if (!optarg || streq(i[0], optarg)) {
 933                                         fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
 934                                               "<node>\n", stdout);
 935                                         fputs(i[1], stdout);
 936                                         fputs("</node>\n", stdout);
 937
 938                                         if (optarg)
 939                                                 break;
 940                                 }
 941
 942                         if (!i[0] && optarg)
 943                                 log_error("Unknown interface %s.", optarg);
 944
 945                         arg_action = ACTION_DONE;
 946                         break;
 947                 }
 948
 949                 case 'h':
 950                         arg_action = ACTION_HELP;
 951                         break;
 952
 953                 case 'D':
 954                         log_set_max_level(LOG_DEBUG);
 955                         break;
 956
 957                 case 'b':
 958                 case 's':
 959                 case 'z':
 960                         /* Just to eat away the sysvinit kernel
 961                          * cmdline args without getopt() error
 962                          * messages that we'll parse in
 963                          * parse_proc_cmdline_word() or ignore. */
 964
 965                 case '?':
 966                 default:
 967                         if (getpid() != 1) {
 968                                 log_error("Unknown option code %c", c);
 969                                 return -EINVAL;
 970                         }
 971
 972                         break;
 973                 }
 974
 975         if (optind < argc && getpid() != 1) {
 976                 /* Hmm, when we aren't run as init system
 977                  * let's complain about excess arguments */
 978
 979                 log_error("Excess arguments.");
 980                 return -EINVAL;
 981         }
 982
 983         if (detect_container(NULL) > 0) {
 984                 char **a;
 985
 986                 /* All /proc/cmdline arguments the kernel didn't
 987                  * understand it passed to us. We're not really
 988                  * interested in that usually since /proc/cmdline is
 989                  * more interesting and complete. With one exception:
 990                  * if we are run in a container /proc/cmdline is not
 991                  * relevant for the container, hence we rely on argv[]
 992                  * instead. */
 993
 994                 for (a = argv; a < argv + argc; a++)
 995                         if ((r = parse_proc_cmdline_word(*a)) < 0)
 996                                 return r;
 997         }
 998
 999         return 0;
1000 }
1001
1002 static int help(void) {
1003
1004         printf("%s [OPTIONS...]\n\n"
1005                "Starts up and maintains the system or user services.\n\n"
1006                "  -h --help                      Show this help\n"
1007                "     --test                      Determine startup sequence, dump it and exit\n"
1008                "     --dump-configuration-items  Dump understood unit configuration items\n"
1009                "     --introspect[=INTERFACE]    Extract D-Bus interface data\n"
1010                "     --unit=UNIT                 Set default unit\n"
1011                "     --system                    Run a system instance, even if PID != 1\n"
1012                "     --user                      Run a user instance\n"
1013                "     --dump-core                 Dump core on crash\n"
1014                "     --crash-shell               Run shell on crash\n"
1015                "     --confirm-spawn             Ask for confirmation when spawning processes\n"
1016                "     --show-status[=0|1]         Show status updates on the console during bootup\n"
1017 #ifdef HAVE_SYSV_COMPAT
1018                "     --sysv-console[=0|1]        Connect output of SysV scripts to console\n"
1019 #endif
1020                "     --log-target=TARGET         Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1021                "     --log-level=LEVEL           Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1022                "     --log-color[=0|1]           Highlight important log messages\n"
1023                "     --log-location[=0|1]        Include code location in log messages\n"
1024                "     --default-standard-output=  Set default standard output for services\n"
1025                "     --default-standard-error=   Set default standard error output for services\n",
1026                program_invocation_short_name);
1027
1028         return 0;
1029 }
1030
1031 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
1032         FILE *f = NULL;
1033         FDSet *fds = NULL;
1034         int r;
1035
1036         assert(m);
1037         assert(_f);
1038         assert(_fds);
1039
1040         /* Make sure nothing is really destructed when we shut down */
1041         m->n_reloading ++;
1042
1043         if ((r = manager_open_serialization(m, &f)) < 0) {
1044                 log_error("Failed to create serialization file: %s", strerror(-r));
1045                 goto fail;
1046         }
1047
1048         if (!(fds = fdset_new())) {
1049                 r = -ENOMEM;
1050                 log_error("Failed to allocate fd set: %s", strerror(-r));
1051                 goto fail;
1052         }
1053
1054         if ((r = manager_serialize(m, f, fds)) < 0) {
1055                 log_error("Failed to serialize state: %s", strerror(-r));
1056                 goto fail;
1057         }
1058
1059         if (fseeko(f, 0, SEEK_SET) < 0) {
1060                 log_error("Failed to rewind serialization fd: %m");
1061                 goto fail;
1062         }
1063
1064         if ((r = fd_cloexec(fileno(f), false)) < 0) {
1065                 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1066                 goto fail;
1067         }
1068
1069         if ((r = fdset_cloexec(fds, false)) < 0) {
1070                 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1071                 goto fail;
1072         }
1073
1074         *_f = f;
1075         *_fds = fds;
1076
1077         return 0;
1078
1079 fail:
1080         fdset_free(fds);
1081
1082         if (f)
1083                 fclose(f);
1084
1085         return r;
1086 }
1087
1088 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1089         const char *e;
1090         unsigned long long a, b;
1091
1092         assert(t);
1093
1094         if (!(e = getenv("RD_TIMESTAMP")))
1095                 return NULL;
1096
1097         if (sscanf(e, "%llu %llu", &a, &b) != 2)
1098                 return NULL;
1099
1100         t->realtime = (usec_t) a;
1101         t->monotonic = (usec_t) b;
1102
1103         return t;
1104 }
1105
1106 static void test_mtab(void) {
1107         char *p;
1108
1109         /* Check that /etc/mtab is a symlink */
1110
1111         if (readlink_malloc("/etc/mtab", &p) >= 0) {
1112                 bool b;
1113
1114                 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1115                 free(p);
1116
1117                 if (b)
1118                         return;
1119         }
1120
1121         log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1122                     "This is not supported anymore. "
1123                     "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1124 }
1125
1126 static void test_usr(void) {
1127
1128         /* Check that /usr is not a separate fs */
1129
1130         if (dir_is_empty("/usr") <= 0)
1131                 return;
1132
1133         log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1134                     "Some things will probably break (sometimes even silently) in mysterious ways. "
1135                     "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1136 }
1137
1138 static void test_cgroups(void) {
1139
1140         if (access("/proc/cgroups", F_OK) >= 0)
1141                 return;
1142
1143         log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1144                     "Systems without control groups are not supported. "
1145                     "We will now sleep for 10s, and then continue boot-up. "
1146                     "Expect breakage and please do not file bugs. "
1147                     "Instead fix your kernel and enable CONFIG_CGROUPS." );
1148
1149         sleep(10);
1150 }
1151
1152 int main(int argc, char *argv[]) {
1153         Manager *m = NULL;
1154         int r, retval = EXIT_FAILURE;
1155         usec_t before_startup, after_startup;
1156         char timespan[FORMAT_TIMESPAN_MAX];
1157         FDSet *fds = NULL;
1158         bool reexecute = false;
1159         const char *shutdown_verb = NULL;
1160         dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1161         static char systemd[] = "systemd";
1162         bool is_reexec = false;
1163         int j;
1164         bool loaded_policy = false;
1165
1166 #ifdef HAVE_SYSV_COMPAT
1167         if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1168                 /* This is compatibility support for SysV, where
1169                  * calling init as a user is identical to telinit. */
1170
1171                 errno = -ENOENT;
1172                 execv(SYSTEMCTL_BINARY_PATH, argv);
1173                 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1174                 return 1;
1175         }
1176 #endif
1177
1178         /* Determine if this is a reexecution or normal bootup. We do
1179          * the full command line parsing much later, so let's just
1180          * have a quick peek here. */
1181
1182         for (j = 1; j < argc; j++)
1183                 if (streq(argv[j], "--deserialize")) {
1184                         is_reexec = true;
1185                         break;
1186                 }
1187
1188         /* If we get started via the /sbin/init symlink then we are
1189            called 'init'. After a subsequent reexecution we are then
1190            called 'systemd'. That is confusing, hence let's call us
1191            systemd right-away. */
1192         program_invocation_short_name = systemd;
1193         prctl(PR_SET_NAME, systemd);
1194
1195         saved_argv = argv;
1196         saved_argc = argc;
1197
1198         log_show_color(isatty(STDERR_FILENO) > 0);
1199         log_show_location(false);
1200         log_set_max_level(LOG_INFO);
1201
1202         if (getpid() == 1) {
1203                 arg_running_as = MANAGER_SYSTEM;
1204                 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_JOURNAL_OR_KMSG);
1205
1206                 if (!is_reexec)
1207                         if (selinux_setup(&loaded_policy) < 0)
1208                                 goto finish;
1209
1210                 log_open();
1211
1212                 if (label_init() < 0)
1213                         goto finish;
1214
1215                 if (!is_reexec)
1216                         if (hwclock_is_localtime() > 0) {
1217                                 int min;
1218
1219                                 r = hwclock_apply_localtime_delta(&min);
1220                                 if (r < 0)
1221                                         log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1222                                 else
1223                                         log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1224                         }
1225
1226         } else {
1227                 arg_running_as = MANAGER_USER;
1228                 log_set_target(LOG_TARGET_AUTO);
1229                 log_open();
1230         }
1231
1232         /* Initialize default unit */
1233         if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1234                 goto finish;
1235
1236         /* By default, mount "cpu" and "cpuacct" together */
1237         arg_join_controllers = new(char**, 2);
1238         if (!arg_join_controllers)
1239                 goto finish;
1240
1241         arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1242         arg_join_controllers[1] = NULL;
1243
1244         if (!arg_join_controllers[0])
1245                 goto finish;
1246
1247         /* Mount /proc, /sys and friends, so that /proc/cmdline and
1248          * /proc/$PID/fd is available. */
1249         if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1250                 r = mount_setup(loaded_policy);
1251                 if (r < 0)
1252                         goto finish;
1253         }
1254
1255         /* Reset all signal handlers. */
1256         assert_se(reset_all_signal_handlers() == 0);
1257
1258         /* If we are init, we can block sigkill. Yay. */
1259         ignore_signals(SIGNALS_IGNORE, -1);
1260
1261         if (parse_config_file() < 0)
1262                 goto finish;
1263
1264         if (arg_running_as == MANAGER_SYSTEM)
1265                 if (parse_proc_cmdline() < 0)
1266                         goto finish;
1267
1268         log_parse_environment();
1269
1270         if (parse_argv(argc, argv) < 0)
1271                 goto finish;
1272
1273         if (arg_action == ACTION_TEST && geteuid() == 0) {
1274                 log_error("Don't run test mode as root.");
1275                 goto finish;
1276         }
1277
1278         if (arg_running_as == MANAGER_SYSTEM &&
1279             arg_action == ACTION_RUN &&
1280             running_in_chroot() > 0) {
1281                 log_error("Cannot be run in a chroot() environment.");
1282                 goto finish;
1283         }
1284
1285         if (arg_action == ACTION_HELP) {
1286                 retval = help();
1287                 goto finish;
1288         } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1289                 unit_dump_config_items(stdout);
1290                 retval = EXIT_SUCCESS;
1291                 goto finish;
1292         } else if (arg_action == ACTION_DONE) {
1293                 retval = EXIT_SUCCESS;
1294                 goto finish;
1295         }
1296
1297         assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1298
1299         /* Close logging fds, in order not to confuse fdset below */
1300         log_close();
1301
1302         /* Remember open file descriptors for later deserialization */
1303         if (serialization) {
1304                 if ((r = fdset_new_fill(&fds)) < 0) {
1305                         log_error("Failed to allocate fd set: %s", strerror(-r));
1306                         goto finish;
1307                 }
1308
1309                 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1310         } else
1311                 close_all_fds(NULL, 0);
1312
1313         /* Set up PATH unless it is already set */
1314         setenv("PATH",
1315 #ifdef HAVE_SPLIT_USR
1316                "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1317 #else
1318                "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1319 #endif
1320                arg_running_as == MANAGER_SYSTEM);
1321
1322         if (arg_running_as == MANAGER_SYSTEM) {
1323                 /* Parse the data passed to us by the initrd and unset it */
1324                 parse_initrd_timestamp(&initrd_timestamp);
1325                 filter_environ("RD_");
1326
1327                 /* Unset some environment variables passed in from the
1328                  * kernel that don't really make sense for us. */
1329                 unsetenv("HOME");
1330                 unsetenv("TERM");
1331
1332                 /* All other variables are left as is, so that clients
1333                  * can still read them via /proc/1/environ */
1334         }
1335
1336         /* Move out of the way, so that we won't block unmounts */
1337         assert_se(chdir("/")  == 0);
1338
1339         if (arg_running_as == MANAGER_SYSTEM) {
1340                 /* Become a session leader if we aren't one yet. */
1341                 setsid();
1342
1343                 /* Disable the umask logic */
1344                 umask(0);
1345         }
1346
1347         /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1348         dbus_connection_set_change_sigpipe(FALSE);
1349
1350         /* Reset the console, but only if this is really init and we
1351          * are freshly booted */
1352         if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1353                 console_setup(getpid() == 1 && !is_reexec);
1354                 make_null_stdio();
1355         }
1356
1357         /* Open the logging devices, if possible and necessary */
1358         log_open();
1359
1360         /* Make sure we leave a core dump without panicing the
1361          * kernel. */
1362         if (getpid() == 1)
1363                 install_crash_handler();
1364
1365         if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1366                 r = mount_cgroup_controllers(arg_join_controllers);
1367                 if (r < 0)
1368                         goto finish;
1369         }
1370
1371         log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1372                  PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1373
1374         if (arg_running_as == MANAGER_SYSTEM && !is_reexec) {
1375                 locale_setup();
1376
1377                 if (arg_show_status || plymouth_running())
1378                         status_welcome();
1379
1380                 kmod_setup();
1381                 hostname_setup();
1382                 machine_id_setup();
1383                 loopback_setup();
1384
1385                 test_mtab();
1386                 test_usr();
1387                 test_cgroups();
1388         }
1389
1390         if ((r = manager_new(arg_running_as, &m)) < 0) {
1391                 log_error("Failed to allocate manager object: %s", strerror(-r));
1392                 goto finish;
1393         }
1394
1395         m->confirm_spawn = arg_confirm_spawn;
1396 #ifdef HAVE_SYSV_COMPAT
1397         m->sysv_console = arg_sysv_console;
1398 #endif
1399         m->mount_auto = arg_mount_auto;
1400         m->swap_auto = arg_swap_auto;
1401         m->default_std_output = arg_default_std_output;
1402         m->default_std_error = arg_default_std_error;
1403
1404         if (dual_timestamp_is_set(&initrd_timestamp))
1405                 m->initrd_timestamp = initrd_timestamp;
1406
1407         if (arg_default_controllers)
1408                 manager_set_default_controllers(m, arg_default_controllers);
1409
1410         manager_set_show_status(m, arg_show_status);
1411
1412         before_startup = now(CLOCK_MONOTONIC);
1413
1414         if ((r = manager_startup(m, serialization, fds)) < 0)
1415                 log_error("Failed to fully start up daemon: %s", strerror(-r));
1416
1417         if (fds) {
1418                 /* This will close all file descriptors that were opened, but
1419                  * not claimed by any unit. */
1420
1421                 fdset_free(fds);
1422                 fds = NULL;
1423         }
1424
1425         if (serialization) {
1426                 fclose(serialization);
1427                 serialization = NULL;
1428         } else {
1429                 DBusError error;
1430                 Unit *target = NULL;
1431                 Job *default_unit_job;
1432
1433                 dbus_error_init(&error);
1434
1435                 log_debug("Activating default unit: %s", arg_default_unit);
1436
1437                 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1438                         log_error("Failed to load default target: %s", bus_error(&error, r));
1439                         dbus_error_free(&error);
1440                 } else if (target->load_state == UNIT_ERROR)
1441                         log_error("Failed to load default target: %s", strerror(-target->load_error));
1442                 else if (target->load_state == UNIT_MASKED)
1443                         log_error("Default target masked.");
1444
1445                 if (!target || target->load_state != UNIT_LOADED) {
1446                         log_info("Trying to load rescue target...");
1447
1448                         if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1449                                 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1450                                 dbus_error_free(&error);
1451                                 goto finish;
1452                         } else if (target->load_state == UNIT_ERROR) {
1453                                 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1454                                 goto finish;
1455                         } else if (target->load_state == UNIT_MASKED) {
1456                                 log_error("Rescue target masked.");
1457                                 goto finish;
1458                         }
1459                 }
1460
1461                 assert(target->load_state == UNIT_LOADED);
1462
1463                 if (arg_action == ACTION_TEST) {
1464                         printf("-> By units:\n");
1465                         manager_dump_units(m, stdout, "\t");
1466                 }
1467
1468                 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1469                 if (r < 0) {
1470                         log_error("Failed to start default target: %s", bus_error(&error, r));
1471                         dbus_error_free(&error);
1472                         goto finish;
1473                 }
1474                 m->default_unit_job_id = default_unit_job->id;
1475
1476                 after_startup = now(CLOCK_MONOTONIC);
1477                 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1478                          "Loaded units and determined initial transaction in %s.",
1479                           format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1480
1481                 if (arg_action == ACTION_TEST) {
1482                         printf("-> By jobs:\n");
1483                         manager_dump_jobs(m, stdout, "\t");
1484                         retval = EXIT_SUCCESS;
1485                         goto finish;
1486                 }
1487         }
1488
1489         for (;;) {
1490                 if ((r = manager_loop(m)) < 0) {
1491                         log_error("Failed to run mainloop: %s", strerror(-r));
1492                         goto finish;
1493                 }
1494
1495                 switch (m->exit_code) {
1496
1497                 case MANAGER_EXIT:
1498                         retval = EXIT_SUCCESS;
1499                         log_debug("Exit.");
1500                         goto finish;
1501
1502                 case MANAGER_RELOAD:
1503                         log_info("Reloading.");
1504                         if ((r = manager_reload(m)) < 0)
1505                                 log_error("Failed to reload: %s", strerror(-r));
1506                         break;
1507
1508                 case MANAGER_REEXECUTE:
1509                         if (prepare_reexecute(m, &serialization, &fds) < 0)
1510                                 goto finish;
1511
1512                         reexecute = true;
1513                         log_notice("Reexecuting.");
1514                         goto finish;
1515
1516                 case MANAGER_REBOOT:
1517                 case MANAGER_POWEROFF:
1518                 case MANAGER_HALT:
1519                 case MANAGER_KEXEC: {
1520                         static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1521                                 [MANAGER_REBOOT] = "reboot",
1522                                 [MANAGER_POWEROFF] = "poweroff",
1523                                 [MANAGER_HALT] = "halt",
1524                                 [MANAGER_KEXEC] = "kexec"
1525                         };
1526
1527                         assert_se(shutdown_verb = table[m->exit_code]);
1528
1529                         log_notice("Shutting down.");
1530                         goto finish;
1531                 }
1532
1533                 default:
1534                         assert_not_reached("Unknown exit code.");
1535                 }
1536         }
1537
1538 finish:
1539         if (m)
1540                 manager_free(m);
1541
1542         free(arg_default_unit);
1543         strv_free(arg_default_controllers);
1544         free_join_controllers();
1545
1546         dbus_shutdown();
1547
1548         label_finish();
1549
1550         if (reexecute) {
1551                 const char *args[15];
1552                 unsigned i = 0;
1553                 char sfd[16];
1554
1555                 assert(serialization);
1556                 assert(fds);
1557
1558                 args[i++] = SYSTEMD_BINARY_PATH;
1559
1560                 args[i++] = "--log-level";
1561                 args[i++] = log_level_to_string(log_get_max_level());
1562
1563                 args[i++] = "--log-target";
1564                 args[i++] = log_target_to_string(log_get_target());
1565
1566                 if (arg_running_as == MANAGER_SYSTEM)
1567                         args[i++] = "--system";
1568                 else
1569                         args[i++] = "--user";
1570
1571                 if (arg_dump_core)
1572                         args[i++] = "--dump-core";
1573
1574                 if (arg_crash_shell)
1575                         args[i++] = "--crash-shell";
1576
1577                 if (arg_confirm_spawn)
1578                         args[i++] = "--confirm-spawn";
1579
1580                 if (arg_show_status)
1581                         args[i++] = "--show-status=1";
1582                 else
1583                         args[i++] = "--show-status=0";
1584
1585 #ifdef HAVE_SYSV_COMPAT
1586                 if (arg_sysv_console)
1587                         args[i++] = "--sysv-console=1";
1588                 else
1589                         args[i++] = "--sysv-console=0";
1590 #endif
1591
1592                 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1593                 char_array_0(sfd);
1594
1595                 args[i++] = "--deserialize";
1596                 args[i++] = sfd;
1597
1598                 args[i++] = NULL;
1599
1600                 assert(i <= ELEMENTSOF(args));
1601
1602                 execv(args[0], (char* const*) args);
1603
1604                 log_error("Failed to reexecute: %m");
1605         }
1606
1607         if (serialization)
1608                 fclose(serialization);
1609
1610         if (fds)
1611                 fdset_free(fds);
1612
1613         if (shutdown_verb) {
1614                 const char * command_line[] = {
1615                         SYSTEMD_SHUTDOWN_BINARY_PATH,
1616                         shutdown_verb,
1617                         NULL
1618                 };
1619
1620                 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1621                 log_error("Failed to execute shutdown binary, freezing: %m");
1622         }
1623
1624         if (getpid() == 1)
1625                 freeze();
1626
1627         return retval;
1628 }