src/systemctl.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 <sys/reboot.h>
  23 #include <stdio.h>
  24 #include <getopt.h>
  25 #include <stdbool.h>
  26 #include <string.h>
  27 #include <errno.h>
  28 #include <sys/ioctl.h>
  29 #include <termios.h>
  30 #include <unistd.h>
  31 #include <fcntl.h>
  32 #include <sys/socket.h>
  33 #include <sys/stat.h>
  34 #include <stddef.h>
  35 #include <sys/prctl.h>
  36 #include <dbus/dbus.h>
  37
  38 #include <systemd/sd-daemon.h>
  39
  40 #include "log.h"
  41 #include "util.h"
  42 #include "macro.h"
  43 #include "set.h"
  44 #include "utmp-wtmp.h"
  45 #include "special.h"
  46 #include "initreq.h"
  47 #include "strv.h"
  48 #include "dbus-common.h"
  49 #include "cgroup-show.h"
  50 #include "cgroup-util.h"
  51 #include "list.h"
  52 #include "path-lookup.h"
  53 #include "conf-parser.h"
  54 #include "shutdownd.h"
  55 #include "exit-status.h"
  56 #include "bus-errors.h"
  57 #include "build.h"
  58 #include "unit-name.h"
  59 #include "pager.h"
  60 #include "spawn-agent.h"
  61 #include "install.h"
  62 #include "logs-show.h"
  63
  64 static const char *arg_type = NULL;
  65 static char **arg_property = NULL;
  66 static bool arg_all = false;
  67 static const char *arg_job_mode = "replace";
  68 static UnitFileScope arg_scope = UNIT_FILE_SYSTEM;
  69 static bool arg_immediate = false;
  70 static bool arg_no_block = false;
  71 static bool arg_no_legend = false;
  72 static bool arg_no_pager = false;
  73 static bool arg_no_wtmp = false;
  74 static bool arg_no_sync = false;
  75 static bool arg_no_wall = false;
  76 static bool arg_no_reload = false;
  77 static bool arg_dry = false;
  78 static bool arg_quiet = false;
  79 static bool arg_full = false;
  80 static bool arg_force = false;
  81 static bool arg_ask_password = false;
  82 static bool arg_failed = false;
  83 static bool arg_runtime = false;
  84 static char **arg_wall = NULL;
  85 static const char *arg_kill_who = NULL;
  86 static const char *arg_kill_mode = NULL;
  87 static int arg_signal = SIGTERM;
  88 static const char *arg_root = NULL;
  89 static usec_t arg_when = 0;
  90 static enum action {
  91         ACTION_INVALID,
  92         ACTION_SYSTEMCTL,
  93         ACTION_HALT,
  94         ACTION_POWEROFF,
  95         ACTION_REBOOT,
  96         ACTION_KEXEC,
  97         ACTION_EXIT,
  98         ACTION_RUNLEVEL2,
  99         ACTION_RUNLEVEL3,
 100         ACTION_RUNLEVEL4,
 101         ACTION_RUNLEVEL5,
 102         ACTION_RESCUE,
 103         ACTION_EMERGENCY,
 104         ACTION_DEFAULT,
 105         ACTION_RELOAD,
 106         ACTION_REEXEC,
 107         ACTION_RUNLEVEL,
 108         ACTION_CANCEL_SHUTDOWN,
 109         _ACTION_MAX
 110 } arg_action = ACTION_SYSTEMCTL;
 111 static enum dot {
 112         DOT_ALL,
 113         DOT_ORDER,
 114         DOT_REQUIRE
 115 } arg_dot = DOT_ALL;
 116 static enum transport {
 117         TRANSPORT_NORMAL,
 118         TRANSPORT_SSH,
 119         TRANSPORT_POLKIT
 120 } arg_transport = TRANSPORT_NORMAL;
 121 static const char *arg_host = NULL;
 122 static bool arg_follow = false;
 123 static unsigned arg_lines = 10;
 124 static OutputMode arg_output = OUTPUT_SHORT;
 125
 126 static bool private_bus = false;
 127
 128 static int daemon_reload(DBusConnection *bus, char **args);
 129
 130 static bool on_tty(void) {
 131         static int t = -1;
 132
 133         /* Note that this is invoked relatively early, before we start
 134          * the pager. That means the value we return reflects whether
 135          * we originally were started on a tty, not if we currently
 136          * are. But this is intended, since we want colour and so on
 137          * when run in our own pager. */
 138
 139         if (_unlikely_(t < 0))
 140                 t = isatty(STDOUT_FILENO) > 0;
 141
 142         return t;
 143 }
 144
 145 static void pager_open_if_enabled(void) {
 146
 147         /* Cache result before we open the pager */
 148         on_tty();
 149
 150         if (arg_no_pager)
 151                 return;
 152
 153         pager_open();
 154 }
 155
 156 static void agent_open_if_enabled(void) {
 157
 158         /* Open the password agent as a child process if necessary */
 159
 160         if (!arg_ask_password)
 161                 return;
 162
 163         if (arg_scope != UNIT_FILE_SYSTEM)
 164                 return;
 165
 166         agent_open();
 167 }
 168
 169 static const char *ansi_highlight(bool b) {
 170
 171         if (!on_tty())
 172                 return "";
 173
 174         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
 175 }
 176
 177 static const char *ansi_highlight_green(bool b) {
 178
 179         if (!on_tty())
 180                 return "";
 181
 182         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
 183 }
 184
 185 static bool error_is_no_service(const DBusError *error) {
 186         assert(error);
 187
 188         if (!dbus_error_is_set(error))
 189                 return false;
 190
 191         if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
 192                 return true;
 193
 194         if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
 195                 return true;
 196
 197         return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
 198 }
 199
 200 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
 201         assert(error);
 202
 203         if (!dbus_error_is_set(error))
 204                 return r;
 205
 206         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
 207             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
 208             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
 209             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
 210                 return EXIT_NOPERMISSION;
 211
 212         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
 213                 return EXIT_NOTINSTALLED;
 214
 215         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
 216             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
 217                 return EXIT_NOTIMPLEMENTED;
 218
 219         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
 220                 return EXIT_NOTCONFIGURED;
 221
 222         if (r != 0)
 223                 return r;
 224
 225         return EXIT_FAILURE;
 226 }
 227
 228 static void warn_wall(enum action action) {
 229         static const char *table[_ACTION_MAX] = {
 230                 [ACTION_HALT]      = "The system is going down for system halt NOW!",
 231                 [ACTION_REBOOT]    = "The system is going down for reboot NOW!",
 232                 [ACTION_POWEROFF]  = "The system is going down for power-off NOW!",
 233                 [ACTION_KEXEC]     = "The system is going down for kexec reboot NOW!",
 234                 [ACTION_RESCUE]    = "The system is going down to rescue mode NOW!",
 235                 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
 236         };
 237
 238         if (arg_no_wall)
 239                 return;
 240
 241         if (arg_wall) {
 242                 char *p;
 243
 244                 if (!(p = strv_join(arg_wall, " "))) {
 245                         log_error("Failed to join strings.");
 246                         return;
 247                 }
 248
 249                 if (*p) {
 250                         utmp_wall(p, NULL);
 251                         free(p);
 252                         return;
 253                 }
 254
 255                 free(p);
 256         }
 257
 258         if (!table[action])
 259                 return;
 260
 261         utmp_wall(table[action], NULL);
 262 }
 263
 264 static bool avoid_bus(void) {
 265
 266         if (running_in_chroot() > 0)
 267                 return true;
 268
 269         if (sd_booted() <= 0)
 270                 return true;
 271
 272         if (!isempty(arg_root))
 273                 return true;
 274
 275         if (arg_scope == UNIT_FILE_GLOBAL)
 276                 return true;
 277
 278         return false;
 279 }
 280
 281 struct unit_info {
 282         const char *id;
 283         const char *description;
 284         const char *load_state;
 285         const char *active_state;
 286         const char *sub_state;
 287         const char *following;
 288         const char *unit_path;
 289         uint32_t job_id;
 290         const char *job_type;
 291         const char *job_path;
 292 };
 293
 294 static int compare_unit_info(const void *a, const void *b) {
 295         const char *d1, *d2;
 296         const struct unit_info *u = a, *v = b;
 297
 298         d1 = strrchr(u->id, '.');
 299         d2 = strrchr(v->id, '.');
 300
 301         if (d1 && d2) {
 302                 int r;
 303
 304                 if ((r = strcasecmp(d1, d2)) != 0)
 305                         return r;
 306         }
 307
 308         return strcasecmp(u->id, v->id);
 309 }
 310
 311 static bool output_show_unit(const struct unit_info *u) {
 312         const char *dot;
 313
 314         if (arg_failed)
 315                 return streq(u->active_state, "failed");
 316
 317         return (!arg_type || ((dot = strrchr(u->id, '.')) &&
 318                               streq(dot+1, arg_type))) &&
 319                 (arg_all || !(streq(u->active_state, "inactive") || u->following[0]) || u->job_id > 0);
 320 }
 321
 322 static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
 323         unsigned id_len, max_id_len, active_len, sub_len, job_len, desc_len, n_shown = 0;
 324         const struct unit_info *u;
 325
 326         max_id_len = sizeof("UNIT")-1;
 327         active_len = sizeof("ACTIVE")-1;
 328         sub_len = sizeof("SUB")-1;
 329         job_len = sizeof("JOB")-1;
 330         desc_len = 0;
 331
 332         for (u = unit_infos; u < unit_infos + c; u++) {
 333                 if (!output_show_unit(u))
 334                         continue;
 335
 336                 max_id_len = MAX(max_id_len, strlen(u->id));
 337                 active_len = MAX(active_len, strlen(u->active_state));
 338                 sub_len = MAX(sub_len, strlen(u->sub_state));
 339                 if (u->job_id != 0)
 340                         job_len = MAX(job_len, strlen(u->job_type));
 341         }
 342
 343         if (!arg_full) {
 344                 unsigned basic_len;
 345                 id_len = MIN(max_id_len, 25);
 346                 basic_len = 5 + id_len + 6 + active_len + sub_len + job_len;
 347                 if (basic_len < (unsigned) columns()) {
 348                         unsigned extra_len, incr;
 349                         extra_len = columns() - basic_len;
 350                         /* Either UNIT already got 25, or is fully satisfied.
 351                          * Grant up to 25 to DESC now. */
 352                         incr = MIN(extra_len, 25);
 353                         desc_len += incr;
 354                         extra_len -= incr;
 355                         /* split the remaining space between UNIT and DESC,
 356                          * but do not give UNIT more than it needs. */
 357                         if (extra_len > 0) {
 358                                 incr = MIN(extra_len / 2, max_id_len - id_len);
 359                                 id_len += incr;
 360                                 desc_len += extra_len - incr;
 361                         }
 362                 }
 363         } else
 364                 id_len = max_id_len;
 365
 366         if (!arg_no_legend) {
 367                 printf("%-*s %-6s %-*s %-*s %-*s ", id_len, "UNIT", "LOAD",
 368                        active_len, "ACTIVE", sub_len, "SUB", job_len, "JOB");
 369                 if (!arg_full && arg_no_pager)
 370                         printf("%.*s\n", desc_len, "DESCRIPTION");
 371                 else
 372                         printf("%s\n", "DESCRIPTION");
 373         }
 374
 375         for (u = unit_infos; u < unit_infos + c; u++) {
 376                 char *e;
 377                 const char *on_loaded, *off_loaded;
 378                 const char *on_active, *off_active;
 379
 380                 if (!output_show_unit(u))
 381                         continue;
 382
 383                 n_shown++;
 384
 385                 if (streq(u->load_state, "error")) {
 386                         on_loaded = ansi_highlight(true);
 387                         off_loaded = ansi_highlight(false);
 388                 } else
 389                         on_loaded = off_loaded = "";
 390
 391                 if (streq(u->active_state, "failed")) {
 392                         on_active = ansi_highlight(true);
 393                         off_active = ansi_highlight(false);
 394                 } else
 395                         on_active = off_active = "";
 396
 397                 e = arg_full ? NULL : ellipsize(u->id, id_len, 33);
 398
 399                 printf("%-*s %s%-6s%s %s%-*s %-*s%s %-*s ",
 400                        id_len, e ? e : u->id,
 401                        on_loaded, u->load_state, off_loaded,
 402                        on_active, active_len, u->active_state,
 403                        sub_len, u->sub_state, off_active,
 404                        job_len, u->job_id ? u->job_type : "");
 405                 if (!arg_full && arg_no_pager)
 406                         printf("%.*s\n", desc_len, u->description);
 407                 else
 408                         printf("%s\n", u->description);
 409
 410                 free(e);
 411         }
 412
 413         if (!arg_no_legend) {
 414                 printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
 415                        "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
 416                        "SUB    = The low-level unit activation state, values depend on unit type.\n"
 417                        "JOB    = Pending job for the unit.\n");
 418
 419                 if (arg_all)
 420                         printf("\n%u units listed.\n", n_shown);
 421                 else
 422                         printf("\n%u units listed. Pass --all to see inactive units, too.\n", n_shown);
 423         }
 424 }
 425
 426 static int list_units(DBusConnection *bus, char **args) {
 427         DBusMessage *m = NULL, *reply = NULL;
 428         DBusError error;
 429         int r;
 430         DBusMessageIter iter, sub, sub2;
 431         unsigned c = 0, n_units = 0;
 432         struct unit_info *unit_infos = NULL;
 433
 434         dbus_error_init(&error);
 435
 436         assert(bus);
 437
 438         pager_open_if_enabled();
 439
 440         if (!(m = dbus_message_new_method_call(
 441                               "org.freedesktop.systemd1",
 442                               "/org/freedesktop/systemd1",
 443                               "org.freedesktop.systemd1.Manager",
 444                               "ListUnits"))) {
 445                 log_error("Could not allocate message.");
 446                 return -ENOMEM;
 447         }
 448
 449         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 450                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 451                 r = -EIO;
 452                 goto finish;
 453         }
 454
 455         if (!dbus_message_iter_init(reply, &iter) ||
 456             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 457             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 458                 log_error("Failed to parse reply.");
 459                 r = -EIO;
 460                 goto finish;
 461         }
 462
 463         dbus_message_iter_recurse(&iter, &sub);
 464
 465         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 466                 struct unit_info *u;
 467
 468                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 469                         log_error("Failed to parse reply.");
 470                         r = -EIO;
 471                         goto finish;
 472                 }
 473
 474                 if (c >= n_units) {
 475                         struct unit_info *w;
 476
 477                         n_units = MAX(2*c, 16);
 478                         w = realloc(unit_infos, sizeof(struct unit_info) * n_units);
 479
 480                         if (!w) {
 481                                 log_error("Failed to allocate unit array.");
 482                                 r = -ENOMEM;
 483                                 goto finish;
 484                         }
 485
 486                         unit_infos = w;
 487                 }
 488
 489                 u = unit_infos+c;
 490
 491                 dbus_message_iter_recurse(&sub, &sub2);
 492
 493                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->id, true) < 0 ||
 494                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->description, true) < 0 ||
 495                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->load_state, true) < 0 ||
 496                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->active_state, true) < 0 ||
 497                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->sub_state, true) < 0 ||
 498                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->following, true) < 0 ||
 499                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->unit_path, true) < 0 ||
 500                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &u->job_id, true) < 0 ||
 501                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->job_type, true) < 0 ||
 502                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->job_path, false) < 0) {
 503                         log_error("Failed to parse reply.");
 504                         r = -EIO;
 505                         goto finish;
 506                 }
 507
 508                 dbus_message_iter_next(&sub);
 509                 c++;
 510         }
 511
 512         if (c > 0) {
 513                 qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
 514                 output_units_list(unit_infos, c);
 515         }
 516
 517         r = 0;
 518
 519 finish:
 520         if (m)
 521                 dbus_message_unref(m);
 522
 523         if (reply)
 524                 dbus_message_unref(reply);
 525
 526         free(unit_infos);
 527
 528         dbus_error_free(&error);
 529
 530         return r;
 531 }
 532
 533 static int compare_unit_file_list(const void *a, const void *b) {
 534         const char *d1, *d2;
 535         const UnitFileList *u = a, *v = b;
 536
 537         d1 = strrchr(u->path, '.');
 538         d2 = strrchr(v->path, '.');
 539
 540         if (d1 && d2) {
 541                 int r;
 542
 543                 r = strcasecmp(d1, d2);
 544                 if (r != 0)
 545                         return r;
 546         }
 547
 548         return strcasecmp(file_name_from_path(u->path), file_name_from_path(v->path));
 549 }
 550
 551 static bool output_show_unit_file(const UnitFileList *u) {
 552         const char *dot;
 553
 554         return !arg_type || ((dot = strrchr(u->path, '.')) && streq(dot+1, arg_type));
 555 }
 556
 557 static void output_unit_file_list(const UnitFileList *units, unsigned c) {
 558         unsigned max_id_len, id_cols, state_cols, n_shown = 0;
 559         const UnitFileList *u;
 560
 561         max_id_len = sizeof("UNIT FILE")-1;
 562         state_cols = sizeof("STATE")-1;
 563         for (u = units; u < units + c; u++) {
 564                 if (!output_show_unit_file(u))
 565                         continue;
 566
 567                 max_id_len = MAX(max_id_len, strlen(file_name_from_path(u->path)));
 568                 state_cols = MAX(state_cols, strlen(unit_file_state_to_string(u->state)));
 569         }
 570
 571         if (!arg_full) {
 572                 unsigned basic_cols;
 573                 id_cols = MIN(max_id_len, 25);
 574                 basic_cols = 1 + id_cols + state_cols;
 575                 if (basic_cols < (unsigned) columns())
 576                         id_cols += MIN(columns() - basic_cols, max_id_len - id_cols);
 577         } else
 578                 id_cols = max_id_len;
 579
 580         if (!arg_no_legend)
 581                 printf("%-*s %-*s\n", id_cols, "UNIT FILE", state_cols, "STATE");
 582
 583         for (u = units; u < units + c; u++) {
 584                 char *e;
 585                 const char *on, *off;
 586                 const char *id;
 587
 588                 if (!output_show_unit_file(u))
 589                         continue;
 590
 591                 n_shown++;
 592
 593                 if (u->state == UNIT_FILE_MASKED ||
 594                     u->state == UNIT_FILE_MASKED_RUNTIME ||
 595                     u->state == UNIT_FILE_DISABLED) {
 596                         on  = ansi_highlight(true);
 597                         off = ansi_highlight(false);
 598                 } else if (u->state == UNIT_FILE_ENABLED) {
 599                         on  = ansi_highlight_green(true);
 600                         off = ansi_highlight_green(false);
 601                 } else
 602                         on = off = "";
 603
 604                 id = file_name_from_path(u->path);
 605
 606                 e = arg_full ? NULL : ellipsize(id, id_cols, 33);
 607
 608                 printf("%-*s %s%-*s%s\n",
 609                        id_cols, e ? e : id,
 610                        on, state_cols, unit_file_state_to_string(u->state), off);
 611
 612                 free(e);
 613         }
 614
 615         if (!arg_no_legend)
 616                 printf("\n%u unit files listed.\n", n_shown);
 617 }
 618
 619 static int list_unit_files(DBusConnection *bus, char **args) {
 620         DBusMessage *m = NULL, *reply = NULL;
 621         DBusError error;
 622         int r;
 623         DBusMessageIter iter, sub, sub2;
 624         unsigned c = 0, n_units = 0;
 625         UnitFileList *units = NULL;
 626
 627         dbus_error_init(&error);
 628
 629         pager_open_if_enabled();
 630
 631         if (avoid_bus()) {
 632                 Hashmap *h;
 633                 UnitFileList *u;
 634                 Iterator i;
 635
 636                 h = hashmap_new(string_hash_func, string_compare_func);
 637                 if (!h) {
 638                         log_error("Out of memory");
 639                         return -ENOMEM;
 640                 }
 641
 642                 r = unit_file_get_list(arg_scope, arg_root, h);
 643                 if (r < 0) {
 644                         unit_file_list_free(h);
 645                         log_error("Failed to get unit file list: %s", strerror(-r));
 646                         return r;
 647                 }
 648
 649                 n_units = hashmap_size(h);
 650                 units = new(UnitFileList, n_units);
 651                 if (!units) {
 652                         unit_file_list_free(h);
 653                         log_error("Out of memory");
 654                         return -ENOMEM;
 655                 }
 656
 657                 HASHMAP_FOREACH(u, h, i) {
 658                         memcpy(units + c++, u, sizeof(UnitFileList));
 659                         free(u);
 660                 }
 661
 662                 hashmap_free(h);
 663         } else {
 664                 assert(bus);
 665
 666                 m = dbus_message_new_method_call(
 667                                 "org.freedesktop.systemd1",
 668                                 "/org/freedesktop/systemd1",
 669                                 "org.freedesktop.systemd1.Manager",
 670                                 "ListUnitFiles");
 671                 if (!m) {
 672                         log_error("Could not allocate message.");
 673                         return -ENOMEM;
 674                 }
 675
 676                 reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
 677                 if (!reply) {
 678                         log_error("Failed to issue method call: %s", bus_error_message(&error));
 679                         r = -EIO;
 680                         goto finish;
 681                 }
 682
 683                 if (!dbus_message_iter_init(reply, &iter) ||
 684                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 685                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 686                         log_error("Failed to parse reply.");
 687                         r = -EIO;
 688                         goto finish;
 689                 }
 690
 691                 dbus_message_iter_recurse(&iter, &sub);
 692
 693                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 694                         UnitFileList *u;
 695                         const char *state;
 696
 697                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 698                                 log_error("Failed to parse reply.");
 699                                 r = -EIO;
 700                                 goto finish;
 701                         }
 702
 703                         if (c >= n_units) {
 704                                 UnitFileList *w;
 705
 706                                 n_units = MAX(2*c, 16);
 707                                 w = realloc(units, sizeof(struct UnitFileList) * n_units);
 708
 709                                 if (!w) {
 710                                         log_error("Failed to allocate unit array.");
 711                                         r = -ENOMEM;
 712                                         goto finish;
 713                                 }
 714
 715                                 units = w;
 716                         }
 717
 718                         u = units+c;
 719
 720                         dbus_message_iter_recurse(&sub, &sub2);
 721
 722                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->path, true) < 0 ||
 723                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, false) < 0) {
 724                                 log_error("Failed to parse reply.");
 725                                 r = -EIO;
 726                                 goto finish;
 727                         }
 728
 729                         u->state = unit_file_state_from_string(state);
 730
 731                         dbus_message_iter_next(&sub);
 732                         c++;
 733                 }
 734         }
 735
 736         if (c > 0) {
 737                 qsort(units, c, sizeof(UnitFileList), compare_unit_file_list);
 738                 output_unit_file_list(units, c);
 739         }
 740
 741         r = 0;
 742
 743 finish:
 744         if (m)
 745                 dbus_message_unref(m);
 746
 747         if (reply)
 748                 dbus_message_unref(reply);
 749
 750         free(units);
 751
 752         dbus_error_free(&error);
 753
 754         return r;
 755 }
 756
 757 static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) {
 758         static const char * const colors[] = {
 759                 "Requires",              "[color=\"black\"]",
 760                 "RequiresOverridable",   "[color=\"black\"]",
 761                 "Requisite",             "[color=\"darkblue\"]",
 762                 "RequisiteOverridable",  "[color=\"darkblue\"]",
 763                 "Wants",                 "[color=\"darkgrey\"]",
 764                 "Conflicts",             "[color=\"red\"]",
 765                 "ConflictedBy",          "[color=\"red\"]",
 766                 "After",                 "[color=\"green\"]"
 767         };
 768
 769         const char *c = NULL;
 770         unsigned i;
 771
 772         assert(name);
 773         assert(prop);
 774         assert(iter);
 775
 776         for (i = 0; i < ELEMENTSOF(colors); i += 2)
 777                 if (streq(colors[i], prop)) {
 778                         c = colors[i+1];
 779                         break;
 780                 }
 781
 782         if (!c)
 783                 return 0;
 784
 785         if (arg_dot != DOT_ALL)
 786                 if ((arg_dot == DOT_ORDER) != streq(prop, "After"))
 787                         return 0;
 788
 789         switch (dbus_message_iter_get_arg_type(iter)) {
 790
 791         case DBUS_TYPE_ARRAY:
 792
 793                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
 794                         DBusMessageIter sub;
 795
 796                         dbus_message_iter_recurse(iter, &sub);
 797
 798                         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 799                                 const char *s;
 800
 801                                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
 802                                 dbus_message_iter_get_basic(&sub, &s);
 803                                 printf("\t\"%s\"->\"%s\" %s;\n", name, s, c);
 804
 805                                 dbus_message_iter_next(&sub);
 806                         }
 807
 808                         return 0;
 809                 }
 810         }
 811
 812         return 0;
 813 }
 814
 815 static int dot_one(DBusConnection *bus, const char *name, const char *path) {
 816         DBusMessage *m = NULL, *reply = NULL;
 817         const char *interface = "org.freedesktop.systemd1.Unit";
 818         int r;
 819         DBusError error;
 820         DBusMessageIter iter, sub, sub2, sub3;
 821
 822         assert(bus);
 823         assert(path);
 824
 825         dbus_error_init(&error);
 826
 827         if (!(m = dbus_message_new_method_call(
 828                               "org.freedesktop.systemd1",
 829                               path,
 830                               "org.freedesktop.DBus.Properties",
 831                               "GetAll"))) {
 832                 log_error("Could not allocate message.");
 833                 r = -ENOMEM;
 834                 goto finish;
 835         }
 836
 837         if (!dbus_message_append_args(m,
 838                                       DBUS_TYPE_STRING, &interface,
 839                                       DBUS_TYPE_INVALID)) {
 840                 log_error("Could not append arguments to message.");
 841                 r = -ENOMEM;
 842                 goto finish;
 843         }
 844
 845         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 846                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 847                 r = -EIO;
 848                 goto finish;
 849         }
 850
 851         if (!dbus_message_iter_init(reply, &iter) ||
 852             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 853             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
 854                 log_error("Failed to parse reply.");
 855                 r = -EIO;
 856                 goto finish;
 857         }
 858
 859         dbus_message_iter_recurse(&iter, &sub);
 860
 861         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 862                 const char *prop;
 863
 864                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
 865                         log_error("Failed to parse reply.");
 866                         r = -EIO;
 867                         goto finish;
 868                 }
 869
 870                 dbus_message_iter_recurse(&sub, &sub2);
 871
 872                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
 873                         log_error("Failed to parse reply.");
 874                         r = -EIO;
 875                         goto finish;
 876                 }
 877
 878                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
 879                         log_error("Failed to parse reply.");
 880                         r = -EIO;
 881                         goto finish;
 882                 }
 883
 884                 dbus_message_iter_recurse(&sub2, &sub3);
 885
 886                 if (dot_one_property(name, prop, &sub3)) {
 887                         log_error("Failed to parse reply.");
 888                         r = -EIO;
 889                         goto finish;
 890                 }
 891
 892                 dbus_message_iter_next(&sub);
 893         }
 894
 895         r = 0;
 896
 897 finish:
 898         if (m)
 899                 dbus_message_unref(m);
 900
 901         if (reply)
 902                 dbus_message_unref(reply);
 903
 904         dbus_error_free(&error);
 905
 906         return r;
 907 }
 908
 909 static int dot(DBusConnection *bus, char **args) {
 910         DBusMessage *m = NULL, *reply = NULL;
 911         DBusError error;
 912         int r;
 913         DBusMessageIter iter, sub, sub2;
 914
 915         dbus_error_init(&error);
 916
 917         assert(bus);
 918
 919         if (!(m = dbus_message_new_method_call(
 920                               "org.freedesktop.systemd1",
 921                               "/org/freedesktop/systemd1",
 922                               "org.freedesktop.systemd1.Manager",
 923                               "ListUnits"))) {
 924                 log_error("Could not allocate message.");
 925                 return -ENOMEM;
 926         }
 927
 928         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 929                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 930                 r = -EIO;
 931                 goto finish;
 932         }
 933
 934         if (!dbus_message_iter_init(reply, &iter) ||
 935             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 936             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 937                 log_error("Failed to parse reply.");
 938                 r = -EIO;
 939                 goto finish;
 940         }
 941
 942         printf("digraph systemd {\n");
 943
 944         dbus_message_iter_recurse(&iter, &sub);
 945         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 946                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path;
 947
 948                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 949                         log_error("Failed to parse reply.");
 950                         r = -EIO;
 951                         goto finish;
 952                 }
 953
 954                 dbus_message_iter_recurse(&sub, &sub2);
 955
 956                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
 957                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
 958                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
 959                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
 960                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
 961                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
 962                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) {
 963                         log_error("Failed to parse reply.");
 964                         r = -EIO;
 965                         goto finish;
 966                 }
 967
 968                 if ((r = dot_one(bus, id, unit_path)) < 0)
 969                         goto finish;
 970
 971                 /* printf("\t\"%s\";\n", id); */
 972                 dbus_message_iter_next(&sub);
 973         }
 974
 975         printf("}\n");
 976
 977         log_info("   Color legend: black     = Requires\n"
 978                  "                 dark blue = Requisite\n"
 979                  "                 dark grey = Wants\n"
 980                  "                 red       = Conflicts\n"
 981                  "                 green     = After\n");
 982
 983         if (on_tty())
 984                 log_notice("-- You probably want to process this output with graphviz' dot tool.\n"
 985                            "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n");
 986
 987         r = 0;
 988
 989 finish:
 990         if (m)
 991                 dbus_message_unref(m);
 992
 993         if (reply)
 994                 dbus_message_unref(reply);
 995
 996         dbus_error_free(&error);
 997
 998         return r;
 999 }
1000
1001 static int list_jobs(DBusConnection *bus, char **args) {
1002         DBusMessage *m = NULL, *reply = NULL;
1003         DBusError error;
1004         int r;
1005         DBusMessageIter iter, sub, sub2;
1006         unsigned k = 0;
1007
1008         dbus_error_init(&error);
1009
1010         assert(bus);
1011
1012         pager_open_if_enabled();
1013
1014         if (!(m = dbus_message_new_method_call(
1015                               "org.freedesktop.systemd1",
1016                               "/org/freedesktop/systemd1",
1017                               "org.freedesktop.systemd1.Manager",
1018                               "ListJobs"))) {
1019                 log_error("Could not allocate message.");
1020                 return -ENOMEM;
1021         }
1022
1023         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1024                 log_error("Failed to issue method call: %s", bus_error_message(&error));
1025                 r = -EIO;
1026                 goto finish;
1027         }
1028
1029         if (!dbus_message_iter_init(reply, &iter) ||
1030             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1031             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
1032                 log_error("Failed to parse reply.");
1033                 r = -EIO;
1034                 goto finish;
1035         }
1036
1037         dbus_message_iter_recurse(&iter, &sub);
1038
1039         if (on_tty())
1040                 printf("%4s %-25s %-15s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
1041
1042         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1043                 const char *name, *type, *state, *job_path, *unit_path;
1044                 uint32_t id;
1045                 char *e;
1046
1047                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
1048                         log_error("Failed to parse reply.");
1049                         r = -EIO;
1050                         goto finish;
1051                 }
1052
1053                 dbus_message_iter_recurse(&sub, &sub2);
1054
1055                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
1056                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
1057                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
1058                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
1059                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
1060                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
1061                         log_error("Failed to parse reply.");
1062                         r = -EIO;
1063                         goto finish;
1064                 }
1065
1066                 e = arg_full ? NULL : ellipsize(name, 25, 33);
1067                 printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state);
1068                 free(e);
1069
1070                 k++;
1071
1072                 dbus_message_iter_next(&sub);
1073         }
1074
1075         if (on_tty())
1076                 printf("\n%u jobs listed.\n", k);
1077
1078         r = 0;
1079
1080 finish:
1081         if (m)
1082                 dbus_message_unref(m);
1083
1084         if (reply)
1085                 dbus_message_unref(reply);
1086
1087         dbus_error_free(&error);
1088
1089         return r;
1090 }
1091
1092 static int load_unit(DBusConnection *bus, char **args) {
1093         DBusMessage *m = NULL;
1094         DBusError error;
1095         int r;
1096         char **name;
1097
1098         dbus_error_init(&error);
1099
1100         assert(bus);
1101         assert(args);
1102
1103         STRV_FOREACH(name, args+1) {
1104                 DBusMessage *reply;
1105
1106                 if (!(m = dbus_message_new_method_call(
1107                                       "org.freedesktop.systemd1",
1108                                       "/org/freedesktop/systemd1",
1109                                       "org.freedesktop.systemd1.Manager",
1110                                       "LoadUnit"))) {
1111                         log_error("Could not allocate message.");
1112                         r = -ENOMEM;
1113                         goto finish;
1114                 }
1115
1116                 if (!dbus_message_append_args(m,
1117                                               DBUS_TYPE_STRING, name,
1118                                               DBUS_TYPE_INVALID)) {
1119                         log_error("Could not append arguments to message.");
1120                         r = -ENOMEM;
1121                         goto finish;
1122                 }
1123
1124                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1125                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1126                         r = -EIO;
1127                         goto finish;
1128                 }
1129
1130                 dbus_message_unref(m);
1131                 dbus_message_unref(reply);
1132
1133                 m = reply = NULL;
1134         }
1135
1136         r = 0;
1137
1138 finish:
1139         if (m)
1140                 dbus_message_unref(m);
1141
1142         dbus_error_free(&error);
1143
1144         return r;
1145 }
1146
1147 static int cancel_job(DBusConnection *bus, char **args) {
1148         DBusMessage *m = NULL, *reply = NULL;
1149         DBusError error;
1150         int r;
1151         char **name;
1152
1153         dbus_error_init(&error);
1154
1155         assert(bus);
1156         assert(args);
1157
1158         if (strv_length(args) <= 1)
1159                 return daemon_reload(bus, args);
1160
1161         STRV_FOREACH(name, args+1) {
1162                 unsigned id;
1163                 const char *path;
1164
1165                 if (!(m = dbus_message_new_method_call(
1166                                       "org.freedesktop.systemd1",
1167                                       "/org/freedesktop/systemd1",
1168                                       "org.freedesktop.systemd1.Manager",
1169                                       "GetJob"))) {
1170                         log_error("Could not allocate message.");
1171                         r = -ENOMEM;
1172                         goto finish;
1173                 }
1174
1175                 if ((r = safe_atou(*name, &id)) < 0) {
1176                         log_error("Failed to parse job id: %s", strerror(-r));
1177                         goto finish;
1178                 }
1179
1180                 assert_cc(sizeof(uint32_t) == sizeof(id));
1181                 if (!dbus_message_append_args(m,
1182                                               DBUS_TYPE_UINT32, &id,
1183                                               DBUS_TYPE_INVALID)) {
1184                         log_error("Could not append arguments to message.");
1185                         r = -ENOMEM;
1186                         goto finish;
1187                 }
1188
1189                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1190                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1191                         r = -EIO;
1192                         goto finish;
1193                 }
1194
1195                 if (!dbus_message_get_args(reply, &error,
1196                                            DBUS_TYPE_OBJECT_PATH, &path,
1197                                            DBUS_TYPE_INVALID)) {
1198                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1199                         r = -EIO;
1200                         goto finish;
1201                 }
1202
1203                 dbus_message_unref(m);
1204                 if (!(m = dbus_message_new_method_call(
1205                                       "org.freedesktop.systemd1",
1206                                       path,
1207                                       "org.freedesktop.systemd1.Job",
1208                                       "Cancel"))) {
1209                         log_error("Could not allocate message.");
1210                         r = -ENOMEM;
1211                         goto finish;
1212                 }
1213
1214                 dbus_message_unref(reply);
1215                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1216                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1217                         r = -EIO;
1218                         goto finish;
1219                 }
1220
1221                 dbus_message_unref(m);
1222                 dbus_message_unref(reply);
1223                 m = reply = NULL;
1224         }
1225
1226         r = 0;
1227
1228 finish:
1229         if (m)
1230                 dbus_message_unref(m);
1231
1232         if (reply)
1233                 dbus_message_unref(reply);
1234
1235         dbus_error_free(&error);
1236
1237         return r;
1238 }
1239
1240 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
1241         DBusMessage *m = NULL, *reply = NULL;
1242         dbus_bool_t b = FALSE;
1243         DBusMessageIter iter, sub;
1244         const char
1245                 *interface = "org.freedesktop.systemd1.Unit",
1246                 *property = "NeedDaemonReload",
1247                 *path;
1248
1249         /* We ignore all errors here, since this is used to show a warning only */
1250
1251         if (!(m = dbus_message_new_method_call(
1252                               "org.freedesktop.systemd1",
1253                               "/org/freedesktop/systemd1",
1254                               "org.freedesktop.systemd1.Manager",
1255                               "GetUnit")))
1256                 goto finish;
1257
1258         if (!dbus_message_append_args(m,
1259                                       DBUS_TYPE_STRING, &unit,
1260                                       DBUS_TYPE_INVALID))
1261                 goto finish;
1262
1263         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1264                 goto finish;
1265
1266         if (!dbus_message_get_args(reply, NULL,
1267                                    DBUS_TYPE_OBJECT_PATH, &path,
1268                                    DBUS_TYPE_INVALID))
1269                 goto finish;
1270
1271         dbus_message_unref(m);
1272         if (!(m = dbus_message_new_method_call(
1273                               "org.freedesktop.systemd1",
1274                               path,
1275                               "org.freedesktop.DBus.Properties",
1276                               "Get")))
1277                 goto finish;
1278
1279         if (!dbus_message_append_args(m,
1280                                       DBUS_TYPE_STRING, &interface,
1281                                       DBUS_TYPE_STRING, &property,
1282                                       DBUS_TYPE_INVALID)) {
1283                 goto finish;
1284         }
1285
1286         dbus_message_unref(reply);
1287         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1288                 goto finish;
1289
1290         if (!dbus_message_iter_init(reply, &iter) ||
1291             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
1292                 goto finish;
1293
1294         dbus_message_iter_recurse(&iter, &sub);
1295
1296         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
1297                 goto finish;
1298
1299         dbus_message_iter_get_basic(&sub, &b);
1300
1301 finish:
1302         if (m)
1303                 dbus_message_unref(m);
1304
1305         if (reply)
1306                 dbus_message_unref(reply);
1307
1308         return b;
1309 }
1310
1311 typedef struct WaitData {
1312         Set *set;
1313         char *result;
1314 } WaitData;
1315
1316 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
1317         DBusError error;
1318         WaitData *d = data;
1319
1320         assert(connection);
1321         assert(message);
1322         assert(d);
1323
1324         dbus_error_init(&error);
1325
1326         log_debug("Got D-Bus request: %s.%s() on %s",
1327                   dbus_message_get_interface(message),
1328                   dbus_message_get_member(message),
1329                   dbus_message_get_path(message));
1330
1331         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1332                 log_error("Warning! D-Bus connection terminated.");
1333                 dbus_connection_close(connection);
1334
1335         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1336                 uint32_t id;
1337                 const char *path, *result;
1338                 dbus_bool_t success = true;
1339
1340                 if (dbus_message_get_args(message, &error,
1341                                           DBUS_TYPE_UINT32, &id,
1342                                           DBUS_TYPE_OBJECT_PATH, &path,
1343                                           DBUS_TYPE_STRING, &result,
1344                                           DBUS_TYPE_INVALID)) {
1345                         char *p;
1346
1347                         if ((p = set_remove(d->set, (char*) path)))
1348                                 free(p);
1349
1350                         if (*result)
1351                                 d->result = strdup(result);
1352
1353                         goto finish;
1354                 }
1355 #ifndef LEGACY
1356                 dbus_error_free(&error);
1357
1358                 if (dbus_message_get_args(message, &error,
1359                                           DBUS_TYPE_UINT32, &id,
1360                                           DBUS_TYPE_OBJECT_PATH, &path,
1361                                           DBUS_TYPE_BOOLEAN, &success,
1362                                           DBUS_TYPE_INVALID)) {
1363                         char *p;
1364
1365                         /* Compatibility with older systemd versions <
1366                          * 19 during upgrades. This should be dropped
1367                          * one day */
1368
1369                         if ((p = set_remove(d->set, (char*) path)))
1370                                 free(p);
1371
1372                         if (!success)
1373                                 d->result = strdup("failed");
1374
1375                         goto finish;
1376                 }
1377 #endif
1378
1379                 log_error("Failed to parse message: %s", bus_error_message(&error));
1380         }
1381
1382 finish:
1383         dbus_error_free(&error);
1384         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1385 }
1386
1387 static int enable_wait_for_jobs(DBusConnection *bus) {
1388         DBusError error;
1389
1390         assert(bus);
1391
1392         if (private_bus)
1393                 return 0;
1394
1395         dbus_error_init(&error);
1396         dbus_bus_add_match(bus,
1397                            "type='signal',"
1398                            "sender='org.freedesktop.systemd1',"
1399                            "interface='org.freedesktop.systemd1.Manager',"
1400                            "member='JobRemoved',"
1401                            "path='/org/freedesktop/systemd1'",
1402                            &error);
1403
1404         if (dbus_error_is_set(&error)) {
1405                 log_error("Failed to add match: %s", bus_error_message(&error));
1406                 dbus_error_free(&error);
1407                 return -EIO;
1408         }
1409
1410         /* This is slightly dirty, since we don't undo the match registrations. */
1411         return 0;
1412 }
1413
1414 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1415         int r;
1416         WaitData d;
1417
1418         assert(bus);
1419         assert(s);
1420
1421         zero(d);
1422         d.set = s;
1423
1424         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
1425                 log_error("Failed to add filter.");
1426                 r = -ENOMEM;
1427                 goto finish;
1428         }
1429
1430         while (!set_isempty(s) &&
1431                dbus_connection_read_write_dispatch(bus, -1))
1432                 ;
1433
1434         if (!arg_quiet && d.result) {
1435                 if (streq(d.result, "timeout"))
1436                         log_error("Job timed out.");
1437                 else if (streq(d.result, "canceled"))
1438                         log_error("Job canceled.");
1439                 else if (streq(d.result, "dependency"))
1440                         log_error("A dependency job failed. See system logs for details.");
1441                 else if (!streq(d.result, "done") && !streq(d.result, "skipped"))
1442                         log_error("Job failed. See system logs and 'systemctl status' for details.");
1443         }
1444
1445         if (streq_ptr(d.result, "timeout"))
1446                 r = -ETIME;
1447         else if (streq_ptr(d.result, "canceled"))
1448                 r = -ECANCELED;
1449         else if (!streq_ptr(d.result, "done") && !streq_ptr(d.result, "skipped"))
1450                 r = -EIO;
1451         else
1452                 r = 0;
1453
1454         free(d.result);
1455
1456 finish:
1457         /* This is slightly dirty, since we don't undo the filter registration. */
1458
1459         return r;
1460 }
1461
1462 static int start_unit_one(
1463                 DBusConnection *bus,
1464                 const char *method,
1465                 const char *name,
1466                 const char *mode,
1467                 DBusError *error,
1468                 Set *s) {
1469
1470         DBusMessage *m = NULL, *reply = NULL;
1471         const char *path;
1472         int r;
1473
1474         assert(bus);
1475         assert(method);
1476         assert(name);
1477         assert(mode);
1478         assert(error);
1479         assert(arg_no_block || s);
1480
1481         if (!(m = dbus_message_new_method_call(
1482                               "org.freedesktop.systemd1",
1483                               "/org/freedesktop/systemd1",
1484                               "org.freedesktop.systemd1.Manager",
1485                               method))) {
1486                 log_error("Could not allocate message.");
1487                 r = -ENOMEM;
1488                 goto finish;
1489         }
1490
1491         if (!dbus_message_append_args(m,
1492                                       DBUS_TYPE_STRING, &name,
1493                                       DBUS_TYPE_STRING, &mode,
1494                                       DBUS_TYPE_INVALID)) {
1495                 log_error("Could not append arguments to message.");
1496                 r = -ENOMEM;
1497                 goto finish;
1498         }
1499
1500         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error))) {
1501
1502                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(error)) {
1503                         /* There's always a fallback possible for
1504                          * legacy actions. */
1505                         r = -EADDRNOTAVAIL;
1506                         goto finish;
1507                 }
1508
1509                 log_error("Failed to issue method call: %s", bus_error_message(error));
1510                 r = -EIO;
1511                 goto finish;
1512         }
1513
1514         if (!dbus_message_get_args(reply, error,
1515                                    DBUS_TYPE_OBJECT_PATH, &path,
1516                                    DBUS_TYPE_INVALID)) {
1517                 log_error("Failed to parse reply: %s", bus_error_message(error));
1518                 r = -EIO;
1519                 goto finish;
1520         }
1521
1522         if (need_daemon_reload(bus, name))
1523                 log_warning("Warning: Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
1524                             arg_scope == UNIT_FILE_SYSTEM ? "--system" : "--user");
1525
1526         if (!arg_no_block) {
1527                 char *p;
1528
1529                 if (!(p = strdup(path))) {
1530                         log_error("Failed to duplicate path.");
1531                         r = -ENOMEM;
1532                         goto finish;
1533                 }
1534
1535                 if ((r = set_put(s, p)) < 0) {
1536                         free(p);
1537                         log_error("Failed to add path to set.");
1538                         goto finish;
1539                 }
1540         }
1541
1542         r = 0;
1543
1544 finish:
1545         if (m)
1546                 dbus_message_unref(m);
1547
1548         if (reply)
1549                 dbus_message_unref(reply);
1550
1551         return r;
1552 }
1553
1554 static enum action verb_to_action(const char *verb) {
1555         if (streq(verb, "halt"))
1556                 return ACTION_HALT;
1557         else if (streq(verb, "poweroff"))
1558                 return ACTION_POWEROFF;
1559         else if (streq(verb, "reboot"))
1560                 return ACTION_REBOOT;
1561         else if (streq(verb, "kexec"))
1562                 return ACTION_KEXEC;
1563         else if (streq(verb, "rescue"))
1564                 return ACTION_RESCUE;
1565         else if (streq(verb, "emergency"))
1566                 return ACTION_EMERGENCY;
1567         else if (streq(verb, "default"))
1568                 return ACTION_DEFAULT;
1569         else if (streq(verb, "exit"))
1570                 return ACTION_EXIT;
1571         else
1572                 return ACTION_INVALID;
1573 }
1574
1575 static int start_unit(DBusConnection *bus, char **args) {
1576
1577         static const char * const table[_ACTION_MAX] = {
1578                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1579                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1580                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1581                 [ACTION_KEXEC] = SPECIAL_KEXEC_TARGET,
1582                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1583                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1584                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1585                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1586                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1587                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1588                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET,
1589                 [ACTION_EXIT] = SPECIAL_EXIT_TARGET
1590         };
1591
1592         int r, ret = 0;
1593         const char *method, *mode, *one_name;
1594         Set *s = NULL;
1595         DBusError error;
1596         char **name;
1597
1598         dbus_error_init(&error);
1599
1600         assert(bus);
1601
1602         agent_open_if_enabled();
1603
1604         if (arg_action == ACTION_SYSTEMCTL) {
1605                 method =
1606                         streq(args[0], "stop") ||
1607                         streq(args[0], "condstop")              ? "StopUnit" :
1608                         streq(args[0], "reload")                ? "ReloadUnit" :
1609                         streq(args[0], "restart")               ? "RestartUnit" :
1610
1611                         streq(args[0], "try-restart")           ||
1612                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1613
1614                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1615
1616                         streq(args[0], "reload-or-try-restart") ||
1617                         streq(args[0], "condreload") ||
1618
1619                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1620                                                                   "StartUnit";
1621
1622                 mode =
1623                         (streq(args[0], "isolate") ||
1624                          streq(args[0], "rescue")  ||
1625                          streq(args[0], "emergency")) ? "isolate" : arg_job_mode;
1626
1627                 one_name = table[verb_to_action(args[0])];
1628
1629         } else {
1630                 assert(arg_action < ELEMENTSOF(table));
1631                 assert(table[arg_action]);
1632
1633                 method = "StartUnit";
1634
1635                 mode = (arg_action == ACTION_EMERGENCY ||
1636                         arg_action == ACTION_RESCUE ||
1637                         arg_action == ACTION_RUNLEVEL2 ||
1638                         arg_action == ACTION_RUNLEVEL3 ||
1639                         arg_action == ACTION_RUNLEVEL4 ||
1640                         arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace";
1641
1642                 one_name = table[arg_action];
1643         }
1644
1645         if (!arg_no_block) {
1646                 if ((ret = enable_wait_for_jobs(bus)) < 0) {
1647                         log_error("Could not watch jobs: %s", strerror(-ret));
1648                         goto finish;
1649                 }
1650
1651                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1652                         log_error("Failed to allocate set.");
1653                         ret = -ENOMEM;
1654                         goto finish;
1655                 }
1656         }
1657
1658         if (one_name) {
1659                 if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0)
1660                         goto finish;
1661         } else {
1662                 STRV_FOREACH(name, args+1)
1663                         if ((r = start_unit_one(bus, method, *name, mode, &error, s)) != 0) {
1664                                 ret = translate_bus_error_to_exit_status(r, &error);
1665                                 dbus_error_free(&error);
1666                         }
1667         }
1668
1669         if (!arg_no_block)
1670                 if ((r = wait_for_jobs(bus, s)) < 0) {
1671                         ret = r;
1672                         goto finish;
1673                 }
1674
1675 finish:
1676         if (s)
1677                 set_free_free(s);
1678
1679         dbus_error_free(&error);
1680
1681         return ret;
1682 }
1683
1684 static int start_special(DBusConnection *bus, char **args) {
1685         int r;
1686
1687         assert(bus);
1688         assert(args);
1689
1690         if (arg_force &&
1691             (streq(args[0], "halt") ||
1692              streq(args[0], "poweroff") ||
1693              streq(args[0], "reboot") ||
1694              streq(args[0], "kexec") ||
1695              streq(args[0], "exit")))
1696                 return daemon_reload(bus, args);
1697
1698         r = start_unit(bus, args);
1699
1700         if (r >= 0)
1701                 warn_wall(verb_to_action(args[0]));
1702
1703         return r;
1704 }
1705
1706 static int check_unit(DBusConnection *bus, char **args) {
1707         DBusMessage *m = NULL, *reply = NULL;
1708         const char
1709                 *interface = "org.freedesktop.systemd1.Unit",
1710                 *property = "ActiveState";
1711         int r = 3; /* According to LSB: "program is not running" */
1712         DBusError error;
1713         char **name;
1714
1715         assert(bus);
1716         assert(args);
1717
1718         dbus_error_init(&error);
1719
1720         STRV_FOREACH(name, args+1) {
1721                 const char *path = NULL;
1722                 const char *state;
1723                 DBusMessageIter iter, sub;
1724
1725                 if (!(m = dbus_message_new_method_call(
1726                                       "org.freedesktop.systemd1",
1727                                       "/org/freedesktop/systemd1",
1728                                       "org.freedesktop.systemd1.Manager",
1729                                       "GetUnit"))) {
1730                         log_error("Could not allocate message.");
1731                         r = -ENOMEM;
1732                         goto finish;
1733                 }
1734
1735                 if (!dbus_message_append_args(m,
1736                                               DBUS_TYPE_STRING, name,
1737                                               DBUS_TYPE_INVALID)) {
1738                         log_error("Could not append arguments to message.");
1739                         r = -ENOMEM;
1740                         goto finish;
1741                 }
1742
1743                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1744
1745                         /* Hmm, cannot figure out anything about this unit... */
1746                         if (!arg_quiet)
1747                                 puts("unknown");
1748
1749                         dbus_error_free(&error);
1750                         dbus_message_unref(m);
1751                         m = NULL;
1752                         continue;
1753                 }
1754
1755                 if (!dbus_message_get_args(reply, &error,
1756                                            DBUS_TYPE_OBJECT_PATH, &path,
1757                                            DBUS_TYPE_INVALID)) {
1758                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1759                         r = -EIO;
1760                         goto finish;
1761                 }
1762
1763                 dbus_message_unref(m);
1764                 if (!(m = dbus_message_new_method_call(
1765                                       "org.freedesktop.systemd1",
1766                                       path,
1767                                       "org.freedesktop.DBus.Properties",
1768                                       "Get"))) {
1769                         log_error("Could not allocate message.");
1770                         r = -ENOMEM;
1771                         goto finish;
1772                 }
1773
1774                 if (!dbus_message_append_args(m,
1775                                               DBUS_TYPE_STRING, &interface,
1776                                               DBUS_TYPE_STRING, &property,
1777                                               DBUS_TYPE_INVALID)) {
1778                         log_error("Could not append arguments to message.");
1779                         r = -ENOMEM;
1780                         goto finish;
1781                 }
1782
1783                 dbus_message_unref(reply);
1784                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1785                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1786                         r = -EIO;
1787                         goto finish;
1788                 }
1789
1790                 if (!dbus_message_iter_init(reply, &iter) ||
1791                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1792                         log_error("Failed to parse reply.");
1793                         r = -EIO;
1794                         goto finish;
1795                 }
1796
1797                 dbus_message_iter_recurse(&iter, &sub);
1798
1799                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1800                         log_error("Failed to parse reply.");
1801                         r = -EIO;
1802                         goto finish;
1803                 }
1804
1805                 dbus_message_iter_get_basic(&sub, &state);
1806
1807                 if (!arg_quiet)
1808                         puts(state);
1809
1810                 if (streq(state, "active") || streq(state, "reloading"))
1811                         r = 0;
1812
1813                 dbus_message_unref(m);
1814                 dbus_message_unref(reply);
1815                 m = reply = NULL;
1816         }
1817
1818 finish:
1819         if (m)
1820                 dbus_message_unref(m);
1821
1822         if (reply)
1823                 dbus_message_unref(reply);
1824
1825         dbus_error_free(&error);
1826
1827         return r;
1828 }
1829
1830 static int kill_unit(DBusConnection *bus, char **args) {
1831         DBusMessage *m = NULL;
1832         int r = 0;
1833         DBusError error;
1834         char **name;
1835
1836         assert(bus);
1837         assert(args);
1838
1839         dbus_error_init(&error);
1840
1841         if (!arg_kill_who)
1842                 arg_kill_who = "all";
1843
1844         if (!arg_kill_mode)
1845                 arg_kill_mode = streq(arg_kill_who, "all") ? "control-group" : "process";
1846
1847         STRV_FOREACH(name, args+1) {
1848                 DBusMessage *reply;
1849
1850                 if (!(m = dbus_message_new_method_call(
1851                                       "org.freedesktop.systemd1",
1852                                       "/org/freedesktop/systemd1",
1853                                       "org.freedesktop.systemd1.Manager",
1854                                       "KillUnit"))) {
1855                         log_error("Could not allocate message.");
1856                         r = -ENOMEM;
1857                         goto finish;
1858                 }
1859
1860                 if (!dbus_message_append_args(m,
1861                                               DBUS_TYPE_STRING, name,
1862                                               DBUS_TYPE_STRING, &arg_kill_who,
1863                                               DBUS_TYPE_STRING, &arg_kill_mode,
1864                                               DBUS_TYPE_INT32, &arg_signal,
1865                                               DBUS_TYPE_INVALID)) {
1866                         log_error("Could not append arguments to message.");
1867                         r = -ENOMEM;
1868                         goto finish;
1869                 }
1870
1871                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1872                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1873                         dbus_error_free(&error);
1874                         r = -EIO;
1875                 }
1876
1877                 dbus_message_unref(m);
1878
1879                 if (reply)
1880                         dbus_message_unref(reply);
1881                 m = reply = NULL;
1882         }
1883
1884 finish:
1885         if (m)
1886                 dbus_message_unref(m);
1887
1888         dbus_error_free(&error);
1889
1890         return r;
1891 }
1892
1893 typedef struct ExecStatusInfo {
1894         char *name;
1895
1896         char *path;
1897         char **argv;
1898
1899         bool ignore;
1900
1901         usec_t start_timestamp;
1902         usec_t exit_timestamp;
1903         pid_t pid;
1904         int code;
1905         int status;
1906
1907         LIST_FIELDS(struct ExecStatusInfo, exec);
1908 } ExecStatusInfo;
1909
1910 static void exec_status_info_free(ExecStatusInfo *i) {
1911         assert(i);
1912
1913         free(i->name);
1914         free(i->path);
1915         strv_free(i->argv);
1916         free(i);
1917 }
1918
1919 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1920         uint64_t start_timestamp, exit_timestamp, start_timestamp_monotonic, exit_timestamp_monotonic;
1921         DBusMessageIter sub2, sub3;
1922         const char*path;
1923         unsigned n;
1924         uint32_t pid;
1925         int32_t code, status;
1926         dbus_bool_t ignore;
1927
1928         assert(i);
1929         assert(i);
1930
1931         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1932                 return -EIO;
1933
1934         dbus_message_iter_recurse(sub, &sub2);
1935
1936         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1937                 return -EIO;
1938
1939         if (!(i->path = strdup(path)))
1940                 return -ENOMEM;
1941
1942         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1943             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1944                 return -EIO;
1945
1946         n = 0;
1947         dbus_message_iter_recurse(&sub2, &sub3);
1948         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1949                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1950                 dbus_message_iter_next(&sub3);
1951                 n++;
1952         }
1953
1954
1955         if (!(i->argv = new0(char*, n+1)))
1956                 return -ENOMEM;
1957
1958         n = 0;
1959         dbus_message_iter_recurse(&sub2, &sub3);
1960         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1961                 const char *s;
1962
1963                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1964                 dbus_message_iter_get_basic(&sub3, &s);
1965                 dbus_message_iter_next(&sub3);
1966
1967                 if (!(i->argv[n++] = strdup(s)))
1968                         return -ENOMEM;
1969         }
1970
1971         if (!dbus_message_iter_next(&sub2) ||
1972             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1973             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1974             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp_monotonic, true) < 0 ||
1975             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1976             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp_monotonic, true) < 0 ||
1977             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1978             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1979             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1980                 return -EIO;
1981
1982         i->ignore = ignore;
1983         i->start_timestamp = (usec_t) start_timestamp;
1984         i->exit_timestamp = (usec_t) exit_timestamp;
1985         i->pid = (pid_t) pid;
1986         i->code = code;
1987         i->status = status;
1988
1989         return 0;
1990 }
1991
1992 typedef struct UnitStatusInfo {
1993         const char *id;
1994         const char *load_state;
1995         const char *active_state;
1996         const char *sub_state;
1997         const char *unit_file_state;
1998
1999         const char *description;
2000         const char *following;
2001
2002         const char *path;
2003         const char *default_control_group;
2004
2005         const char *load_error;
2006
2007         usec_t inactive_exit_timestamp;
2008         usec_t inactive_exit_timestamp_monotonic;
2009         usec_t active_enter_timestamp;
2010         usec_t active_exit_timestamp;
2011         usec_t inactive_enter_timestamp;
2012
2013         bool need_daemon_reload;
2014
2015         /* Service */
2016         pid_t main_pid;
2017         pid_t control_pid;
2018         const char *status_text;
2019         bool running:1;
2020 #ifdef HAVE_SYSV_COMPAT
2021         bool is_sysv:1;
2022 #endif
2023
2024         usec_t start_timestamp;
2025         usec_t exit_timestamp;
2026
2027         int exit_code, exit_status;
2028
2029         usec_t condition_timestamp;
2030         bool condition_result;
2031
2032         /* Socket */
2033         unsigned n_accepted;
2034         unsigned n_connections;
2035         bool accept;
2036
2037         /* Device */
2038         const char *sysfs_path;
2039
2040         /* Mount, Automount */
2041         const char *where;
2042
2043         /* Swap */
2044         const char *what;
2045
2046         LIST_HEAD(ExecStatusInfo, exec);
2047 } UnitStatusInfo;
2048
2049 static void print_status_info(UnitStatusInfo *i) {
2050         ExecStatusInfo *p;
2051         const char *on, *off, *ss;
2052         usec_t timestamp;
2053         char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1;
2054         char since2[FORMAT_TIMESTAMP_MAX], *s2;
2055
2056         assert(i);
2057
2058         /* This shows pretty information about a unit. See
2059          * print_property() for a low-level property printer */
2060
2061         printf("%s", strna(i->id));
2062
2063         if (i->description && !streq_ptr(i->id, i->description))
2064                 printf(" - %s", i->description);
2065
2066         printf("\n");
2067
2068         if (i->following)
2069                 printf("\t  Follow: unit currently follows state of %s\n", i->following);
2070
2071         if (streq_ptr(i->load_state, "error")) {
2072                 on = ansi_highlight(true);
2073                 off = ansi_highlight(false);
2074         } else
2075                 on = off = "";
2076
2077         if (i->load_error)
2078                 printf("\t  Loaded: %s%s%s (Reason: %s)\n", on, strna(i->load_state), off, i->load_error);
2079         else if (i->path && i->unit_file_state)
2080                 printf("\t  Loaded: %s%s%s (%s; %s)\n", on, strna(i->load_state), off, i->path, i->unit_file_state);
2081         else if (i->path)
2082                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
2083         else
2084                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
2085
2086         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
2087
2088         if (streq_ptr(i->active_state, "failed")) {
2089                 on = ansi_highlight(true);
2090                 off = ansi_highlight(false);
2091         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
2092                 on = ansi_highlight_green(true);
2093                 off = ansi_highlight_green(false);
2094         } else
2095                 on = off = "";
2096
2097         if (ss)
2098                 printf("\t  Active: %s%s (%s)%s",
2099                        on,
2100                        strna(i->active_state),
2101                        ss,
2102                        off);
2103         else
2104                 printf("\t  Active: %s%s%s",
2105                        on,
2106                        strna(i->active_state),
2107                        off);
2108
2109         timestamp = (streq_ptr(i->active_state, "active")      ||
2110                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
2111                     (streq_ptr(i->active_state, "inactive")    ||
2112                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
2113                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
2114                                                                   i->active_exit_timestamp;
2115
2116         s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp);
2117         s2 = format_timestamp(since2, sizeof(since2), timestamp);
2118
2119         if (s1)
2120                 printf(" since %s; %s\n", s2, s1);
2121         else if (s2)
2122                 printf(" since %s\n", s2);
2123         else
2124                 printf("\n");
2125
2126         if (!i->condition_result && i->condition_timestamp > 0) {
2127                 s1 = format_timestamp_pretty(since1, sizeof(since1), i->condition_timestamp);
2128                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
2129
2130                 if (s1)
2131                         printf("\t          start condition failed at %s; %s\n", s2, s1);
2132                 else if (s2)
2133                         printf("\t          start condition failed at %s\n", s2);
2134         }
2135
2136         if (i->sysfs_path)
2137                 printf("\t  Device: %s\n", i->sysfs_path);
2138         if (i->where)
2139                 printf("\t   Where: %s\n", i->where);
2140         if (i->what)
2141                 printf("\t    What: %s\n", i->what);
2142
2143         if (i->accept)
2144                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
2145
2146         LIST_FOREACH(exec, p, i->exec) {
2147                 char *t;
2148                 bool good;
2149
2150                 /* Only show exited processes here */
2151                 if (p->code == 0)
2152                         continue;
2153
2154                 t = strv_join(p->argv, " ");
2155                 printf("\t Process: %u %s=%s ", p->pid, p->name, strna(t));
2156                 free(t);
2157
2158 #ifdef HAVE_SYSV_COMPAT
2159                 if (i->is_sysv)
2160                         good = is_clean_exit_lsb(p->code, p->status);
2161                 else
2162 #endif
2163                         good = is_clean_exit(p->code, p->status);
2164
2165                 if (!good) {
2166                         on = ansi_highlight(true);
2167                         off = ansi_highlight(false);
2168                 } else
2169                         on = off = "";
2170
2171                 printf("%s(code=%s, ", on, sigchld_code_to_string(p->code));
2172
2173                 if (p->code == CLD_EXITED) {
2174                         const char *c;
2175
2176                         printf("status=%i", p->status);
2177
2178 #ifdef HAVE_SYSV_COMPAT
2179                         if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
2180 #else
2181                         if ((c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD)))
2182 #endif
2183                                 printf("/%s", c);
2184
2185                 } else
2186                         printf("signal=%s", signal_to_string(p->status));
2187
2188                 printf(")%s\n", off);
2189
2190                 if (i->main_pid == p->pid &&
2191                     i->start_timestamp == p->start_timestamp &&
2192                     i->exit_timestamp == p->start_timestamp)
2193                         /* Let's not show this twice */
2194                         i->main_pid = 0;
2195
2196                 if (p->pid == i->control_pid)
2197                         i->control_pid = 0;
2198         }
2199
2200         if (i->main_pid > 0 || i->control_pid > 0) {
2201                 printf("\t");
2202
2203                 if (i->main_pid > 0) {
2204                         printf("Main PID: %u", (unsigned) i->main_pid);
2205
2206                         if (i->running) {
2207                                 char *t = NULL;
2208                                 get_process_comm(i->main_pid, &t);
2209                                 if (t) {
2210                                         printf(" (%s)", t);
2211                                         free(t);
2212                                 }
2213                         } else if (i->exit_code > 0) {
2214                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
2215
2216                                 if (i->exit_code == CLD_EXITED) {
2217                                         const char *c;
2218
2219                                         printf("status=%i", i->exit_status);
2220
2221 #ifdef HAVE_SYSV_COMPAT
2222                                         if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
2223 #else
2224                                         if ((c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD)))
2225 #endif
2226                                                 printf("/%s", c);
2227
2228                                 } else
2229                                         printf("signal=%s", signal_to_string(i->exit_status));
2230                                 printf(")");
2231                         }
2232                 }
2233
2234                 if (i->main_pid > 0 && i->control_pid > 0)
2235                         printf(";");
2236
2237                 if (i->control_pid > 0) {
2238                         char *t = NULL;
2239
2240                         printf(" Control: %u", (unsigned) i->control_pid);
2241
2242                         get_process_comm(i->control_pid, &t);
2243                         if (t) {
2244                                 printf(" (%s)", t);
2245                                 free(t);
2246                         }
2247                 }
2248
2249                 printf("\n");
2250         }
2251
2252         if (i->status_text)
2253                 printf("\t  Status: \"%s\"\n", i->status_text);
2254
2255         if (i->default_control_group) {
2256                 unsigned c;
2257
2258                 printf("\t  CGroup: %s\n", i->default_control_group);
2259
2260                 if (arg_transport != TRANSPORT_SSH) {
2261                         if ((c = columns()) > 18)
2262                                 c -= 18;
2263                         else
2264                                 c = 0;
2265
2266                         show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
2267                 }
2268         }
2269
2270         if (i->id && arg_transport != TRANSPORT_SSH) {
2271                 printf("\n");
2272                 show_journal_by_unit(i->id, arg_output, NULL, 0, i->inactive_exit_timestamp_monotonic, arg_lines, arg_all, arg_follow);
2273         }
2274
2275         if (i->need_daemon_reload)
2276                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
2277                        ansi_highlight(true),
2278                        ansi_highlight(false),
2279                        arg_scope == UNIT_FILE_SYSTEM ? "--system" : "--user");
2280 }
2281
2282 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
2283
2284         assert(name);
2285         assert(iter);
2286         assert(i);
2287
2288         switch (dbus_message_iter_get_arg_type(iter)) {
2289
2290         case DBUS_TYPE_STRING: {
2291                 const char *s;
2292
2293                 dbus_message_iter_get_basic(iter, &s);
2294
2295                 if (!isempty(s)) {
2296                         if (streq(name, "Id"))
2297                                 i->id = s;
2298                         else if (streq(name, "LoadState"))
2299                                 i->load_state = s;
2300                         else if (streq(name, "ActiveState"))
2301                                 i->active_state = s;
2302                         else if (streq(name, "SubState"))
2303                                 i->sub_state = s;
2304                         else if (streq(name, "Description"))
2305                                 i->description = s;
2306                         else if (streq(name, "FragmentPath"))
2307                                 i->path = s;
2308 #ifdef HAVE_SYSV_COMPAT
2309                         else if (streq(name, "SysVPath")) {
2310                                 i->is_sysv = true;
2311                                 i->path = s;
2312                         }
2313 #endif
2314                         else if (streq(name, "DefaultControlGroup"))
2315                                 i->default_control_group = s;
2316                         else if (streq(name, "StatusText"))
2317                                 i->status_text = s;
2318                         else if (streq(name, "SysFSPath"))
2319                                 i->sysfs_path = s;
2320                         else if (streq(name, "Where"))
2321                                 i->where = s;
2322                         else if (streq(name, "What"))
2323                                 i->what = s;
2324                         else if (streq(name, "Following"))
2325                                 i->following = s;
2326                         else if (streq(name, "UnitFileState"))
2327                                 i->unit_file_state = s;
2328                 }
2329
2330                 break;
2331         }
2332
2333         case DBUS_TYPE_BOOLEAN: {
2334                 dbus_bool_t b;
2335
2336                 dbus_message_iter_get_basic(iter, &b);
2337
2338                 if (streq(name, "Accept"))
2339                         i->accept = b;
2340                 else if (streq(name, "NeedDaemonReload"))
2341                         i->need_daemon_reload = b;
2342                 else if (streq(name, "ConditionResult"))
2343                         i->condition_result = b;
2344
2345                 break;
2346         }
2347
2348         case DBUS_TYPE_UINT32: {
2349                 uint32_t u;
2350
2351                 dbus_message_iter_get_basic(iter, &u);
2352
2353                 if (streq(name, "MainPID")) {
2354                         if (u > 0) {
2355                                 i->main_pid = (pid_t) u;
2356                                 i->running = true;
2357                         }
2358                 } else if (streq(name, "ControlPID"))
2359                         i->control_pid = (pid_t) u;
2360                 else if (streq(name, "ExecMainPID")) {
2361                         if (u > 0)
2362                                 i->main_pid = (pid_t) u;
2363                 } else if (streq(name, "NAccepted"))
2364                         i->n_accepted = u;
2365                 else if (streq(name, "NConnections"))
2366                         i->n_connections = u;
2367
2368                 break;
2369         }
2370
2371         case DBUS_TYPE_INT32: {
2372                 int32_t j;
2373
2374                 dbus_message_iter_get_basic(iter, &j);
2375
2376                 if (streq(name, "ExecMainCode"))
2377                         i->exit_code = (int) j;
2378                 else if (streq(name, "ExecMainStatus"))
2379                         i->exit_status = (int) j;
2380
2381                 break;
2382         }
2383
2384         case DBUS_TYPE_UINT64: {
2385                 uint64_t u;
2386
2387                 dbus_message_iter_get_basic(iter, &u);
2388
2389                 if (streq(name, "ExecMainStartTimestamp"))
2390                         i->start_timestamp = (usec_t) u;
2391                 else if (streq(name, "ExecMainExitTimestamp"))
2392                         i->exit_timestamp = (usec_t) u;
2393                 else if (streq(name, "ActiveEnterTimestamp"))
2394                         i->active_enter_timestamp = (usec_t) u;
2395                 else if (streq(name, "InactiveEnterTimestamp"))
2396                         i->inactive_enter_timestamp = (usec_t) u;
2397                 else if (streq(name, "InactiveExitTimestamp"))
2398                         i->inactive_exit_timestamp = (usec_t) u;
2399                 else if (streq(name, "InactiveExitTimestampMonotonic"))
2400                         i->inactive_exit_timestamp_monotonic = (usec_t) u;
2401                 else if (streq(name, "ActiveExitTimestamp"))
2402                         i->active_exit_timestamp = (usec_t) u;
2403                 else if (streq(name, "ConditionTimestamp"))
2404                         i->condition_timestamp = (usec_t) u;
2405
2406                 break;
2407         }
2408
2409         case DBUS_TYPE_ARRAY: {
2410
2411                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
2412                     startswith(name, "Exec")) {
2413                         DBusMessageIter sub;
2414
2415                         dbus_message_iter_recurse(iter, &sub);
2416                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2417                                 ExecStatusInfo *info;
2418                                 int r;
2419
2420                                 if (!(info = new0(ExecStatusInfo, 1)))
2421                                         return -ENOMEM;
2422
2423                                 if (!(info->name = strdup(name))) {
2424                                         free(info);
2425                                         return -ENOMEM;
2426                                 }
2427
2428                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
2429                                         free(info);
2430                                         return r;
2431                                 }
2432
2433                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
2434
2435                                 dbus_message_iter_next(&sub);
2436                         }
2437                 }
2438
2439                 break;
2440         }
2441
2442         case DBUS_TYPE_STRUCT: {
2443
2444                 if (streq(name, "LoadError")) {
2445                         DBusMessageIter sub;
2446                         const char *n, *message;
2447                         int r;
2448
2449                         dbus_message_iter_recurse(iter, &sub);
2450
2451                         r = bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &n, true);
2452                         if (r < 0)
2453                                 return r;
2454
2455                         r = bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &message, false);
2456                         if (r < 0)
2457                                 return r;
2458
2459                         if (!isempty(message))
2460                                 i->load_error = message;
2461                 }
2462
2463                 break;
2464         }
2465         }
2466
2467         return 0;
2468 }
2469
2470 static int print_property(const char *name, DBusMessageIter *iter) {
2471         assert(name);
2472         assert(iter);
2473
2474         /* This is a low-level property printer, see
2475          * print_status_info() for the nicer output */
2476
2477         if (arg_property && !strv_find(arg_property, name))
2478                 return 0;
2479
2480         switch (dbus_message_iter_get_arg_type(iter)) {
2481
2482         case DBUS_TYPE_STRUCT: {
2483                 DBusMessageIter sub;
2484                 dbus_message_iter_recurse(iter, &sub);
2485
2486                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2487                         uint32_t u;
2488
2489                         dbus_message_iter_get_basic(&sub, &u);
2490
2491                         if (u)
2492                                 printf("%s=%u\n", name, (unsigned) u);
2493                         else if (arg_all)
2494                                 printf("%s=\n", name);
2495
2496                         return 0;
2497                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2498                         const char *s;
2499
2500                         dbus_message_iter_get_basic(&sub, &s);
2501
2502                         if (arg_all || s[0])
2503                                 printf("%s=%s\n", name, s);
2504
2505                         return 0;
2506                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "LoadError")) {
2507                         const char *a = NULL, *b = NULL;
2508
2509                         if (bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &a, true) >= 0)
2510                                 bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &b, false);
2511
2512                         if (arg_all || !isempty(a) || !isempty(b))
2513                                 printf("%s=%s \"%s\"\n", name, strempty(a), strempty(b));
2514
2515                         return 0;
2516                 }
2517
2518                 break;
2519         }
2520
2521         case DBUS_TYPE_ARRAY:
2522
2523                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
2524                         DBusMessageIter sub, sub2;
2525
2526                         dbus_message_iter_recurse(iter, &sub);
2527                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2528                                 const char *path;
2529                                 dbus_bool_t ignore;
2530
2531                                 dbus_message_iter_recurse(&sub, &sub2);
2532
2533                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
2534                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
2535                                         printf("EnvironmentFile=%s (ignore_errors=%s)\n", path, yes_no(ignore));
2536
2537                                 dbus_message_iter_next(&sub);
2538                         }
2539
2540                         return 0;
2541
2542                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2543                         DBusMessageIter sub, sub2;
2544
2545                         dbus_message_iter_recurse(iter, &sub);
2546                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2547                                 const char *type, *path;
2548
2549                                 dbus_message_iter_recurse(&sub, &sub2);
2550
2551                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2552                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2553                                         printf("%s=%s\n", type, path);
2554
2555                                 dbus_message_iter_next(&sub);
2556                         }
2557
2558                         return 0;
2559
2560                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2561                         DBusMessageIter sub, sub2;
2562
2563                         dbus_message_iter_recurse(iter, &sub);
2564                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2565                                 const char *base;
2566                                 uint64_t value, next_elapse;
2567
2568                                 dbus_message_iter_recurse(&sub, &sub2);
2569
2570                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2571                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2572                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2573                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2574
2575                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2576                                                base,
2577                                                format_timespan(timespan1, sizeof(timespan1), value),
2578                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2579                                 }
2580
2581                                 dbus_message_iter_next(&sub);
2582                         }
2583
2584                         return 0;
2585
2586                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "ControlGroupAttributes")) {
2587                         DBusMessageIter sub, sub2;
2588
2589                         dbus_message_iter_recurse(iter, &sub);
2590                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2591                                 const char *controller, *attr, *value;
2592
2593                                 dbus_message_iter_recurse(&sub, &sub2);
2594
2595                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &controller, true) >= 0 &&
2596                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &attr, true) >= 0 &&
2597                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &value, false) >= 0) {
2598
2599                                         printf("ControlGroupAttribute={ controller=%s ; attribute=%s ; value=\"%s\" }\n",
2600                                                controller,
2601                                                attr,
2602                                                value);
2603                                 }
2604
2605                                 dbus_message_iter_next(&sub);
2606                         }
2607
2608                         return 0;
2609
2610                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2611                         DBusMessageIter sub;
2612
2613                         dbus_message_iter_recurse(iter, &sub);
2614                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2615                                 ExecStatusInfo info;
2616
2617                                 zero(info);
2618                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2619                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2620                                         char *t;
2621
2622                                         t = strv_join(info.argv, " ");
2623
2624                                         printf("%s={ path=%s ; argv[]=%s ; ignore_errors=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2625                                                name,
2626                                                strna(info.path),
2627                                                strna(t),
2628                                                yes_no(info.ignore),
2629                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2630                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2631                                                (unsigned) info. pid,
2632                                                sigchld_code_to_string(info.code),
2633                                                info.status,
2634                                                info.code == CLD_EXITED ? "" : "/",
2635                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2636
2637                                         free(t);
2638                                 }
2639
2640                                 free(info.path);
2641                                 strv_free(info.argv);
2642
2643                                 dbus_message_iter_next(&sub);
2644                         }
2645
2646                         return 0;
2647                 }
2648
2649                 break;
2650         }
2651
2652         if (generic_print_property(name, iter, arg_all) > 0)
2653                 return 0;
2654
2655         if (arg_all)
2656                 printf("%s=[unprintable]\n", name);
2657
2658         return 0;
2659 }
2660
2661 static int show_one(const char *verb, DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2662         DBusMessage *m = NULL, *reply = NULL;
2663         const char *interface = "";
2664         int r;
2665         DBusError error;
2666         DBusMessageIter iter, sub, sub2, sub3;
2667         UnitStatusInfo info;
2668         ExecStatusInfo *p;
2669
2670         assert(bus);
2671         assert(path);
2672         assert(new_line);
2673
2674         zero(info);
2675         dbus_error_init(&error);
2676
2677         if (!(m = dbus_message_new_method_call(
2678                               "org.freedesktop.systemd1",
2679                               path,
2680                               "org.freedesktop.DBus.Properties",
2681                               "GetAll"))) {
2682                 log_error("Could not allocate message.");
2683                 r = -ENOMEM;
2684                 goto finish;
2685         }
2686
2687         if (!dbus_message_append_args(m,
2688                                       DBUS_TYPE_STRING, &interface,
2689                                       DBUS_TYPE_INVALID)) {
2690                 log_error("Could not append arguments to message.");
2691                 r = -ENOMEM;
2692                 goto finish;
2693         }
2694
2695         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2696                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2697                 r = -EIO;
2698                 goto finish;
2699         }
2700
2701         if (!dbus_message_iter_init(reply, &iter) ||
2702             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2703             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2704                 log_error("Failed to parse reply.");
2705                 r = -EIO;
2706                 goto finish;
2707         }
2708
2709         dbus_message_iter_recurse(&iter, &sub);
2710
2711         if (*new_line)
2712                 printf("\n");
2713
2714         *new_line = true;
2715
2716         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2717                 const char *name;
2718
2719                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2720                         log_error("Failed to parse reply.");
2721                         r = -EIO;
2722                         goto finish;
2723                 }
2724
2725                 dbus_message_iter_recurse(&sub, &sub2);
2726
2727                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2728                         log_error("Failed to parse reply.");
2729                         r = -EIO;
2730                         goto finish;
2731                 }
2732
2733                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2734                         log_error("Failed to parse reply.");
2735                         r = -EIO;
2736                         goto finish;
2737                 }
2738
2739                 dbus_message_iter_recurse(&sub2, &sub3);
2740
2741                 if (show_properties)
2742                         r = print_property(name, &sub3);
2743                 else
2744                         r = status_property(name, &sub3, &info);
2745
2746                 if (r < 0) {
2747                         log_error("Failed to parse reply.");
2748                         r = -EIO;
2749                         goto finish;
2750                 }
2751
2752                 dbus_message_iter_next(&sub);
2753         }
2754
2755         r = 0;
2756
2757         if (!show_properties)
2758                 print_status_info(&info);
2759
2760         if (!streq_ptr(info.active_state, "active") &&
2761             !streq_ptr(info.active_state, "reloading") &&
2762             streq(verb, "status"))
2763                 /* According to LSB: "program not running" */
2764                 r = 3;
2765
2766         while ((p = info.exec)) {
2767                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2768                 exec_status_info_free(p);
2769         }
2770
2771 finish:
2772         if (m)
2773                 dbus_message_unref(m);
2774
2775         if (reply)
2776                 dbus_message_unref(reply);
2777
2778         dbus_error_free(&error);
2779
2780         return r;
2781 }
2782
2783 static int show(DBusConnection *bus, char **args) {
2784         DBusMessage *m = NULL, *reply = NULL;
2785         int r, ret = 0;
2786         DBusError error;
2787         bool show_properties, new_line = false;
2788         char **name;
2789
2790         assert(bus);
2791         assert(args);
2792
2793         dbus_error_init(&error);
2794
2795         show_properties = !streq(args[0], "status");
2796
2797         if (show_properties)
2798                 pager_open_if_enabled();
2799
2800         if (show_properties && strv_length(args) <= 1) {
2801                 /* If not argument is specified inspect the manager
2802                  * itself */
2803
2804                 ret = show_one(args[0], bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2805                 goto finish;
2806         }
2807
2808         STRV_FOREACH(name, args+1) {
2809                 const char *path = NULL;
2810                 uint32_t id;
2811
2812                 if (safe_atou32(*name, &id) < 0) {
2813
2814                         /* Interpret as unit name */
2815
2816                         if (!(m = dbus_message_new_method_call(
2817                                               "org.freedesktop.systemd1",
2818                                               "/org/freedesktop/systemd1",
2819                                               "org.freedesktop.systemd1.Manager",
2820                                               "LoadUnit"))) {
2821                                 log_error("Could not allocate message.");
2822                                 ret = -ENOMEM;
2823                                 goto finish;
2824                         }
2825
2826                         if (!dbus_message_append_args(m,
2827                                                       DBUS_TYPE_STRING, name,
2828                                                       DBUS_TYPE_INVALID)) {
2829                                 log_error("Could not append arguments to message.");
2830                                 ret = -ENOMEM;
2831                                 goto finish;
2832                         }
2833
2834                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2835
2836                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2837                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2838                                         ret = -EIO;
2839                                         goto finish;
2840                                 }
2841
2842                                 dbus_error_free(&error);
2843
2844                                 dbus_message_unref(m);
2845                                 if (!(m = dbus_message_new_method_call(
2846                                                       "org.freedesktop.systemd1",
2847                                                       "/org/freedesktop/systemd1",
2848                                                       "org.freedesktop.systemd1.Manager",
2849                                                       "GetUnit"))) {
2850                                         log_error("Could not allocate message.");
2851                                         ret = -ENOMEM;
2852                                         goto finish;
2853                                 }
2854
2855                                 if (!dbus_message_append_args(m,
2856                                                               DBUS_TYPE_STRING, name,
2857                                                               DBUS_TYPE_INVALID)) {
2858                                         log_error("Could not append arguments to message.");
2859                                         ret = -ENOMEM;
2860                                         goto finish;
2861                                 }
2862
2863                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2864                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2865
2866                                         if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT))
2867                                                 ret = 4; /* According to LSB: "program or service status is unknown" */
2868                                         else
2869                                                 ret = -EIO;
2870                                         goto finish;
2871                                 }
2872                         }
2873
2874                 } else if (show_properties) {
2875
2876                         /* Interpret as job id */
2877
2878                         if (!(m = dbus_message_new_method_call(
2879                                               "org.freedesktop.systemd1",
2880                                               "/org/freedesktop/systemd1",
2881                                               "org.freedesktop.systemd1.Manager",
2882                                               "GetJob"))) {
2883                                 log_error("Could not allocate message.");
2884                                 ret = -ENOMEM;
2885                                 goto finish;
2886                         }
2887
2888                         if (!dbus_message_append_args(m,
2889                                                       DBUS_TYPE_UINT32, &id,
2890                                                       DBUS_TYPE_INVALID)) {
2891                                 log_error("Could not append arguments to message.");
2892                                 ret = -ENOMEM;
2893                                 goto finish;
2894                         }
2895
2896                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2897                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2898                                 ret = -EIO;
2899                                 goto finish;
2900                         }
2901                 } else {
2902
2903                         /* Interpret as PID */
2904
2905                         if (!(m = dbus_message_new_method_call(
2906                                               "org.freedesktop.systemd1",
2907                                               "/org/freedesktop/systemd1",
2908                                               "org.freedesktop.systemd1.Manager",
2909                                               "GetUnitByPID"))) {
2910                                 log_error("Could not allocate message.");
2911                                 ret = -ENOMEM;
2912                                 goto finish;
2913                         }
2914
2915                         if (!dbus_message_append_args(m,
2916                                                       DBUS_TYPE_UINT32, &id,
2917                                                       DBUS_TYPE_INVALID)) {
2918                                 log_error("Could not append arguments to message.");
2919                                 ret = -ENOMEM;
2920                                 goto finish;
2921                         }
2922
2923                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2924                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2925                                 ret = -EIO;
2926                                 goto finish;
2927                         }
2928                 }
2929
2930                 if (!dbus_message_get_args(reply, &error,
2931                                            DBUS_TYPE_OBJECT_PATH, &path,
2932                                            DBUS_TYPE_INVALID)) {
2933                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2934                         ret = -EIO;
2935                         goto finish;
2936                 }
2937
2938                 if ((r = show_one(args[0], bus, path, show_properties, &new_line)) != 0)
2939                         ret = r;
2940
2941                 dbus_message_unref(m);
2942                 dbus_message_unref(reply);
2943                 m = reply = NULL;
2944         }
2945
2946 finish:
2947         if (m)
2948                 dbus_message_unref(m);
2949
2950         if (reply)
2951                 dbus_message_unref(reply);
2952
2953         dbus_error_free(&error);
2954
2955         return ret;
2956 }
2957
2958 static int dump(DBusConnection *bus, char **args) {
2959         DBusMessage *m = NULL, *reply = NULL;
2960         DBusError error;
2961         int r;
2962         const char *text;
2963
2964         dbus_error_init(&error);
2965
2966         pager_open_if_enabled();
2967
2968         if (!(m = dbus_message_new_method_call(
2969                               "org.freedesktop.systemd1",
2970                               "/org/freedesktop/systemd1",
2971                               "org.freedesktop.systemd1.Manager",
2972                               "Dump"))) {
2973                 log_error("Could not allocate message.");
2974                 return -ENOMEM;
2975         }
2976
2977         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2978                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2979                 r = -EIO;
2980                 goto finish;
2981         }
2982
2983         if (!dbus_message_get_args(reply, &error,
2984                                    DBUS_TYPE_STRING, &text,
2985                                    DBUS_TYPE_INVALID)) {
2986                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2987                 r = -EIO;
2988                 goto finish;
2989         }
2990
2991         fputs(text, stdout);
2992
2993         r = 0;
2994
2995 finish:
2996         if (m)
2997                 dbus_message_unref(m);
2998
2999         if (reply)
3000                 dbus_message_unref(reply);
3001
3002         dbus_error_free(&error);
3003
3004         return r;
3005 }
3006
3007 static int snapshot(DBusConnection *bus, char **args) {
3008         DBusMessage *m = NULL, *reply = NULL;
3009         DBusError error;
3010         int r;
3011         const char *name = "", *path, *id;
3012         dbus_bool_t cleanup = FALSE;
3013         DBusMessageIter iter, sub;
3014         const char
3015                 *interface = "org.freedesktop.systemd1.Unit",
3016                 *property = "Id";
3017
3018         dbus_error_init(&error);
3019
3020         if (!(m = dbus_message_new_method_call(
3021                               "org.freedesktop.systemd1",
3022                               "/org/freedesktop/systemd1",
3023                               "org.freedesktop.systemd1.Manager",
3024                               "CreateSnapshot"))) {
3025                 log_error("Could not allocate message.");
3026                 return -ENOMEM;
3027         }
3028
3029         if (strv_length(args) > 1)
3030                 name = args[1];
3031
3032         if (!dbus_message_append_args(m,
3033                                       DBUS_TYPE_STRING, &name,
3034                                       DBUS_TYPE_BOOLEAN, &cleanup,
3035                                       DBUS_TYPE_INVALID)) {
3036                 log_error("Could not append arguments to message.");
3037                 r = -ENOMEM;
3038                 goto finish;
3039         }
3040
3041         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3042                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3043                 r = -EIO;
3044                 goto finish;
3045         }
3046
3047         if (!dbus_message_get_args(reply, &error,
3048                                    DBUS_TYPE_OBJECT_PATH, &path,
3049                                    DBUS_TYPE_INVALID)) {
3050                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3051                 r = -EIO;
3052                 goto finish;
3053         }
3054
3055         dbus_message_unref(m);
3056         if (!(m = dbus_message_new_method_call(
3057                               "org.freedesktop.systemd1",
3058                               path,
3059                               "org.freedesktop.DBus.Properties",
3060                               "Get"))) {
3061                 log_error("Could not allocate message.");
3062                 return -ENOMEM;
3063         }
3064
3065         if (!dbus_message_append_args(m,
3066                                       DBUS_TYPE_STRING, &interface,
3067                                       DBUS_TYPE_STRING, &property,
3068                                       DBUS_TYPE_INVALID)) {
3069                 log_error("Could not append arguments to message.");
3070                 r = -ENOMEM;
3071                 goto finish;
3072         }
3073
3074         dbus_message_unref(reply);
3075         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3076                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3077                 r = -EIO;
3078                 goto finish;
3079         }
3080
3081         if (!dbus_message_iter_init(reply, &iter) ||
3082             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3083                 log_error("Failed to parse reply.");
3084                 r = -EIO;
3085                 goto finish;
3086         }
3087
3088         dbus_message_iter_recurse(&iter, &sub);
3089
3090         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
3091                 log_error("Failed to parse reply.");
3092                 r = -EIO;
3093                 goto finish;
3094         }
3095
3096         dbus_message_iter_get_basic(&sub, &id);
3097
3098         if (!arg_quiet)
3099                 puts(id);
3100         r = 0;
3101
3102 finish:
3103         if (m)
3104                 dbus_message_unref(m);
3105
3106         if (reply)
3107                 dbus_message_unref(reply);
3108
3109         dbus_error_free(&error);
3110
3111         return r;
3112 }
3113
3114 static int delete_snapshot(DBusConnection *bus, char **args) {
3115         DBusMessage *m = NULL, *reply = NULL;
3116         int r;
3117         DBusError error;
3118         char **name;
3119
3120         assert(bus);
3121         assert(args);
3122
3123         dbus_error_init(&error);
3124
3125         STRV_FOREACH(name, args+1) {
3126                 const char *path = NULL;
3127
3128                 if (!(m = dbus_message_new_method_call(
3129                                       "org.freedesktop.systemd1",
3130                                       "/org/freedesktop/systemd1",
3131                                       "org.freedesktop.systemd1.Manager",
3132                                       "GetUnit"))) {
3133                         log_error("Could not allocate message.");
3134                         r = -ENOMEM;
3135                         goto finish;
3136                 }
3137
3138                 if (!dbus_message_append_args(m,
3139                                               DBUS_TYPE_STRING, name,
3140                                               DBUS_TYPE_INVALID)) {
3141                         log_error("Could not append arguments to message.");
3142                         r = -ENOMEM;
3143                         goto finish;
3144                 }
3145
3146                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3147                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3148                         r = -EIO;
3149                         goto finish;
3150                 }
3151
3152                 if (!dbus_message_get_args(reply, &error,
3153                                            DBUS_TYPE_OBJECT_PATH, &path,
3154                                            DBUS_TYPE_INVALID)) {
3155                         log_error("Failed to parse reply: %s", bus_error_message(&error));
3156                         r = -EIO;
3157                         goto finish;
3158                 }
3159
3160                 dbus_message_unref(m);
3161                 if (!(m = dbus_message_new_method_call(
3162                                       "org.freedesktop.systemd1",
3163                                       path,
3164                                       "org.freedesktop.systemd1.Snapshot",
3165                                       "Remove"))) {
3166                         log_error("Could not allocate message.");
3167                         r = -ENOMEM;
3168                         goto finish;
3169                 }
3170
3171                 dbus_message_unref(reply);
3172                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3173                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3174                         r = -EIO;
3175                         goto finish;
3176                 }
3177
3178                 dbus_message_unref(m);
3179                 dbus_message_unref(reply);
3180                 m = reply = NULL;
3181         }
3182
3183         r = 0;
3184
3185 finish:
3186         if (m)
3187                 dbus_message_unref(m);
3188
3189         if (reply)
3190                 dbus_message_unref(reply);
3191
3192         dbus_error_free(&error);
3193
3194         return r;
3195 }
3196
3197 static int daemon_reload(DBusConnection *bus, char **args) {
3198         DBusMessage *m = NULL, *reply = NULL;
3199         DBusError error;
3200         int r;
3201         const char *method;
3202
3203         dbus_error_init(&error);
3204
3205         if (arg_action == ACTION_RELOAD)
3206                 method = "Reload";
3207         else if (arg_action == ACTION_REEXEC)
3208                 method = "Reexecute";
3209         else {
3210                 assert(arg_action == ACTION_SYSTEMCTL);
3211
3212                 method =
3213                         streq(args[0], "clear-jobs")    ||
3214                         streq(args[0], "cancel")        ? "ClearJobs" :
3215                         streq(args[0], "daemon-reexec") ? "Reexecute" :
3216                         streq(args[0], "reset-failed")  ? "ResetFailed" :
3217                         streq(args[0], "halt")          ? "Halt" :
3218                         streq(args[0], "poweroff")      ? "PowerOff" :
3219                         streq(args[0], "reboot")        ? "Reboot" :
3220                         streq(args[0], "kexec")         ? "KExec" :
3221                         streq(args[0], "exit")          ? "Exit" :
3222                                     /* "daemon-reload" */ "Reload";
3223         }
3224
3225         if (!(m = dbus_message_new_method_call(
3226                               "org.freedesktop.systemd1",
3227                               "/org/freedesktop/systemd1",
3228                               "org.freedesktop.systemd1.Manager",
3229                               method))) {
3230                 log_error("Could not allocate message.");
3231                 return -ENOMEM;
3232         }
3233
3234         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3235
3236                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
3237                         /* There's always a fallback possible for
3238                          * legacy actions. */
3239                         r = -EADDRNOTAVAIL;
3240                         goto finish;
3241                 }
3242
3243                 if (streq(method, "Reexecute") && dbus_error_has_name(&error, DBUS_ERROR_NO_REPLY)) {
3244                         /* On reexecution, we expect a disconnect, not
3245                          * a reply */
3246                         r = 0;
3247                         goto finish;
3248                 }
3249
3250                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3251                 r = -EIO;
3252                 goto finish;
3253         }
3254
3255         r = 0;
3256
3257 finish:
3258         if (m)
3259                 dbus_message_unref(m);
3260
3261         if (reply)
3262                 dbus_message_unref(reply);
3263
3264         dbus_error_free(&error);
3265
3266         return r;
3267 }
3268
3269 static int reset_failed(DBusConnection *bus, char **args) {
3270         DBusMessage *m = NULL;
3271         int r;
3272         DBusError error;
3273         char **name;
3274
3275         assert(bus);
3276         dbus_error_init(&error);
3277
3278         if (strv_length(args) <= 1)
3279                 return daemon_reload(bus, args);
3280
3281         STRV_FOREACH(name, args+1) {
3282                 DBusMessage *reply;
3283
3284                 if (!(m = dbus_message_new_method_call(
3285                                       "org.freedesktop.systemd1",
3286                                       "/org/freedesktop/systemd1",
3287                                       "org.freedesktop.systemd1.Manager",
3288                                       "ResetFailedUnit"))) {
3289                         log_error("Could not allocate message.");
3290                         r = -ENOMEM;
3291                         goto finish;
3292                 }
3293
3294                 if (!dbus_message_append_args(m,
3295                                               DBUS_TYPE_STRING, name,
3296                                               DBUS_TYPE_INVALID)) {
3297                         log_error("Could not append arguments to message.");
3298                         r = -ENOMEM;
3299                         goto finish;
3300                 }
3301
3302                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3303                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3304                         r = -EIO;
3305                         goto finish;
3306                 }
3307
3308                 dbus_message_unref(m);
3309                 dbus_message_unref(reply);
3310                 m = reply = NULL;
3311         }
3312
3313         r = 0;
3314
3315 finish:
3316         if (m)
3317                 dbus_message_unref(m);
3318
3319         dbus_error_free(&error);
3320
3321         return r;
3322 }
3323
3324 static int show_enviroment(DBusConnection *bus, char **args) {
3325         DBusMessage *m = NULL, *reply = NULL;
3326         DBusError error;
3327         DBusMessageIter iter, sub, sub2;
3328         int r;
3329         const char
3330                 *interface = "org.freedesktop.systemd1.Manager",
3331                 *property = "Environment";
3332
3333         dbus_error_init(&error);
3334
3335         pager_open_if_enabled();
3336
3337         if (!(m = dbus_message_new_method_call(
3338                               "org.freedesktop.systemd1",
3339                               "/org/freedesktop/systemd1",
3340                               "org.freedesktop.DBus.Properties",
3341                               "Get"))) {
3342                 log_error("Could not allocate message.");
3343                 return -ENOMEM;
3344         }
3345
3346         if (!dbus_message_append_args(m,
3347                                       DBUS_TYPE_STRING, &interface,
3348                                       DBUS_TYPE_STRING, &property,
3349                                       DBUS_TYPE_INVALID)) {
3350                 log_error("Could not append arguments to message.");
3351                 r = -ENOMEM;
3352                 goto finish;
3353         }
3354
3355         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3356                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3357                 r = -EIO;
3358                 goto finish;
3359         }
3360
3361         if (!dbus_message_iter_init(reply, &iter) ||
3362             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3363                 log_error("Failed to parse reply.");
3364                 r = -EIO;
3365                 goto finish;
3366         }
3367
3368         dbus_message_iter_recurse(&iter, &sub);
3369
3370         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
3371             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
3372                 log_error("Failed to parse reply.");
3373                 r = -EIO;
3374                 goto finish;
3375         }
3376
3377         dbus_message_iter_recurse(&sub, &sub2);
3378
3379         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
3380                 const char *text;
3381
3382                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
3383                         log_error("Failed to parse reply.");
3384                         r = -EIO;
3385                         goto finish;
3386                 }
3387
3388                 dbus_message_iter_get_basic(&sub2, &text);
3389                 printf("%s\n", text);
3390
3391                 dbus_message_iter_next(&sub2);
3392         }
3393
3394         r = 0;
3395
3396 finish:
3397         if (m)
3398                 dbus_message_unref(m);
3399
3400         if (reply)
3401                 dbus_message_unref(reply);
3402
3403         dbus_error_free(&error);
3404
3405         return r;
3406 }
3407
3408 static int set_environment(DBusConnection *bus, char **args) {
3409         DBusMessage *m = NULL, *reply = NULL;
3410         DBusError error;
3411         int r;
3412         const char *method;
3413         DBusMessageIter iter, sub;
3414         char **name;
3415
3416         dbus_error_init(&error);
3417
3418         method = streq(args[0], "set-environment")
3419                 ? "SetEnvironment"
3420                 : "UnsetEnvironment";
3421
3422         if (!(m = dbus_message_new_method_call(
3423                               "org.freedesktop.systemd1",
3424                               "/org/freedesktop/systemd1",
3425                               "org.freedesktop.systemd1.Manager",
3426                               method))) {
3427
3428                 log_error("Could not allocate message.");
3429                 return -ENOMEM;
3430         }
3431
3432         dbus_message_iter_init_append(m, &iter);
3433
3434         if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {
3435                 log_error("Could not append arguments to message.");
3436                 r = -ENOMEM;
3437                 goto finish;
3438         }
3439
3440         STRV_FOREACH(name, args+1)
3441                 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, name)) {
3442                         log_error("Could not append arguments to message.");
3443                         r = -ENOMEM;
3444                         goto finish;
3445                 }
3446
3447         if (!dbus_message_iter_close_container(&iter, &sub)) {
3448                 log_error("Could not append arguments to message.");
3449                 r = -ENOMEM;
3450                 goto finish;
3451         }
3452
3453         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3454                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3455                 r = -EIO;
3456                 goto finish;
3457         }
3458
3459         r = 0;
3460
3461 finish:
3462         if (m)
3463                 dbus_message_unref(m);
3464
3465         if (reply)
3466                 dbus_message_unref(reply);
3467
3468         dbus_error_free(&error);
3469
3470         return r;
3471 }
3472
3473 static int enable_sysv_units(char **args) {
3474         int r = 0;
3475
3476 #if defined (HAVE_SYSV_COMPAT) && (defined(TARGET_FEDORA) || defined(TARGET_MANDRIVA) || defined(TARGET_SUSE) || defined(TARGET_MEEGO) || defined(TARGET_ALTLINUX) || defined(TARGET_MAGEIA))
3477         const char *verb = args[0];
3478         unsigned f = 1, t = 1;
3479         LookupPaths paths;
3480
3481         if (arg_scope != UNIT_FILE_SYSTEM)
3482                 return 0;
3483
3484         if (!streq(verb, "enable") &&
3485             !streq(verb, "disable") &&
3486             !streq(verb, "is-enabled"))
3487                 return 0;
3488
3489         /* Processes all SysV units, and reshuffles the array so that
3490          * afterwards only the native units remain */
3491
3492         zero(paths);
3493         r = lookup_paths_init(&paths, MANAGER_SYSTEM, false);
3494         if (r < 0)
3495                 return r;
3496
3497         r = 0;
3498
3499         for (f = 1; args[f]; f++) {
3500                 const char *name;
3501                 char *p;
3502                 bool found_native = false, found_sysv;
3503                 unsigned c = 1;
3504                 const char *argv[6] = { "/sbin/chkconfig", NULL, NULL, NULL, NULL };
3505                 char **k, *l, *q = NULL;
3506                 int j;
3507                 pid_t pid;
3508                 siginfo_t status;
3509
3510                 name = args[f];
3511
3512                 if (!endswith(name, ".service"))
3513                         continue;
3514
3515                 if (path_is_absolute(name))
3516                         continue;
3517
3518                 STRV_FOREACH(k, paths.unit_path) {
3519                         p = NULL;
3520
3521                         if (!isempty(arg_root))
3522                                 asprintf(&p, "%s/%s/%s", arg_root, *k, name);
3523                         else
3524                                 asprintf(&p, "%s/%s", *k, name);
3525
3526                         if (!p) {
3527                                 log_error("No memory");
3528                                 r = -ENOMEM;
3529                                 goto finish;
3530                         }
3531
3532                         found_native = access(p, F_OK) >= 0;
3533                         free(p);
3534
3535                         if (found_native)
3536                                 break;
3537                 }
3538
3539                 if (found_native)
3540                         continue;
3541
3542                 p = NULL;
3543                 if (!isempty(arg_root))
3544                         asprintf(&p, "%s/" SYSTEM_SYSVINIT_PATH "/%s", arg_root, name);
3545                 else
3546                         asprintf(&p, SYSTEM_SYSVINIT_PATH "/%s", name);
3547                 if (!p) {
3548                         log_error("No memory");
3549                         r = -ENOMEM;
3550                         goto finish;
3551                 }
3552
3553                 p[strlen(p) - sizeof(".service") + 1] = 0;
3554                 found_sysv = access(p, F_OK) >= 0;
3555
3556                 if (!found_sysv) {
3557                         free(p);
3558                         continue;
3559                 }
3560
3561                 /* Mark this entry, so that we don't try enabling it as native unit */
3562                 args[f] = (char*) "";
3563
3564                 log_info("%s is not a native service, redirecting to /sbin/chkconfig.", name);
3565
3566                 if (!isempty(arg_root))
3567                         argv[c++] = q = strappend("--root=", arg_root);
3568
3569                 argv[c++] = file_name_from_path(p);
3570                 argv[c++] =
3571                         streq(verb, "enable") ? "on" :
3572                         streq(verb, "disable") ? "off" : "--level=5";
3573                 argv[c] = NULL;
3574
3575                 l = strv_join((char**)argv, " ");
3576                 if (!l) {
3577                         log_error("No memory.");
3578                         free(q);
3579                         free(p);
3580                         r = -ENOMEM;
3581                         goto finish;
3582                 }
3583
3584                 log_info("Executing %s", l);
3585                 free(l);
3586
3587                 pid = fork();
3588                 if (pid < 0) {
3589                         log_error("Failed to fork: %m");
3590                         free(p);
3591                         free(q);
3592                         r = -errno;
3593                         goto finish;
3594                 } else if (pid == 0) {
3595                         /* Child */
3596
3597                         execv(argv[0], (char**) argv);
3598                         _exit(EXIT_FAILURE);
3599                 }
3600
3601                 free(p);
3602                 free(q);
3603
3604                 j = wait_for_terminate(pid, &status);
3605                 if (j < 0) {
3606                         log_error("Failed to wait for child: %s", strerror(-r));
3607                         r = j;
3608                         goto finish;
3609                 }
3610
3611                 if (status.si_code == CLD_EXITED) {
3612                         if (streq(verb, "is-enabled")) {
3613                                 if (status.si_status == 0) {
3614                                         if (!arg_quiet)
3615                                                 puts("enabled");
3616                                         r = 1;
3617                                 } else {
3618                                         if (!arg_quiet)
3619                                                 puts("disabled");
3620                                 }
3621
3622                         } else if (status.si_status != 0) {
3623                                 r = -EINVAL;
3624                                 goto finish;
3625                         }
3626                 } else {
3627                         r = -EPROTO;
3628                         goto finish;
3629                 }
3630         }
3631
3632 finish:
3633         lookup_paths_free(&paths);
3634
3635         /* Drop all SysV units */
3636         for (f = 1, t = 1; args[f]; f++) {
3637
3638                 if (isempty(args[f]))
3639                         continue;
3640
3641                 args[t++] = args[f];
3642         }
3643
3644         args[t] = NULL;
3645
3646 #endif
3647         return r;
3648 }
3649
3650 static int enable_unit(DBusConnection *bus, char **args) {
3651         const char *verb = args[0];
3652         UnitFileChange *changes = NULL;
3653         unsigned n_changes = 0, i;
3654         int carries_install_info = -1;
3655         DBusMessage *m = NULL, *reply = NULL;
3656         int r;
3657         DBusError error;
3658
3659         dbus_error_init(&error);
3660
3661         r = enable_sysv_units(args);
3662         if (r < 0)
3663                 return r;
3664
3665         if (!bus || avoid_bus()) {
3666                 if (streq(verb, "enable")) {
3667                         r = unit_file_enable(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3668                         carries_install_info = r;
3669                 } else if (streq(verb, "disable"))
3670                         r = unit_file_disable(arg_scope, arg_runtime, arg_root, args+1, &changes, &n_changes);
3671                 else if (streq(verb, "reenable")) {
3672                         r = unit_file_reenable(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3673                         carries_install_info = r;
3674                 } else if (streq(verb, "link"))
3675                         r = unit_file_link(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3676                 else if (streq(verb, "preset")) {
3677                         r = unit_file_preset(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3678                         carries_install_info = r;
3679                 } else if (streq(verb, "mask"))
3680                         r = unit_file_mask(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3681                 else if (streq(verb, "unmask"))
3682                         r = unit_file_unmask(arg_scope, arg_runtime, arg_root, args+1, &changes, &n_changes);
3683                 else
3684                         assert_not_reached("Unknown verb");
3685
3686                 if (r < 0) {
3687                         log_error("Operation failed: %s", strerror(-r));
3688                         goto finish;
3689                 }
3690
3691                 for (i = 0; i < n_changes; i++) {
3692                         if (changes[i].type == UNIT_FILE_SYMLINK)
3693                                 log_info("ln -s '%s' '%s'", changes[i].source, changes[i].path);
3694                         else
3695                                 log_info("rm '%s'", changes[i].path);
3696                 }
3697
3698         } else {
3699                 const char *method;
3700                 bool send_force = true, expect_carries_install_info = false;
3701                 dbus_bool_t a, b;
3702                 DBusMessageIter iter, sub, sub2;
3703
3704                 if (streq(verb, "enable")) {
3705                         method = "EnableUnitFiles";
3706                         expect_carries_install_info = true;
3707                 } else if (streq(verb, "disable")) {
3708                         method = "DisableUnitFiles";
3709                         send_force = false;
3710                 } else if (streq(verb, "reenable")) {
3711                         method = "ReenableUnitFiles";
3712                         expect_carries_install_info = true;
3713                 } else if (streq(verb, "link"))
3714                         method = "LinkUnitFiles";
3715                 else if (streq(verb, "preset")) {
3716                         method = "PresetUnitFiles";
3717                         expect_carries_install_info = true;
3718                 } else if (streq(verb, "mask"))
3719                         method = "MaskUnitFiles";
3720                 else if (streq(verb, "unmask")) {
3721                         method = "UnmaskUnitFiles";
3722                         send_force = false;
3723                 } else
3724                         assert_not_reached("Unknown verb");
3725
3726                 m = dbus_message_new_method_call(
3727                                 "org.freedesktop.systemd1",
3728                                 "/org/freedesktop/systemd1",
3729                                 "org.freedesktop.systemd1.Manager",
3730                                 method);
3731                 if (!m) {
3732                         log_error("Out of memory");
3733                         r = -ENOMEM;
3734                         goto finish;
3735                 }
3736
3737                 dbus_message_iter_init_append(m, &iter);
3738
3739                 r = bus_append_strv_iter(&iter, args+1);
3740                 if (r < 0) {
3741                         log_error("Failed to append unit files.");
3742                         goto finish;
3743                 }
3744
3745                 a = arg_runtime;
3746                 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &a)) {
3747                         log_error("Failed to append runtime boolean.");
3748                         r = -ENOMEM;
3749                         goto finish;
3750                 }
3751
3752                 if (send_force) {
3753                         b = arg_force;
3754
3755                         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b)) {
3756                                 log_error("Failed to append force boolean.");
3757                                 r = -ENOMEM;
3758                                 goto finish;
3759                         }
3760                 }
3761
3762                 reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
3763                 if (!reply) {
3764                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3765                         r = -EIO;
3766                         goto finish;
3767                 }
3768
3769                 if (!dbus_message_iter_init(reply, &iter)) {
3770                         log_error("Failed to initialize iterator.");
3771                         goto finish;
3772                 }
3773
3774                 if (expect_carries_install_info) {
3775                         r = bus_iter_get_basic_and_next(&iter, DBUS_TYPE_BOOLEAN, &b, true);
3776                         if (r < 0) {
3777                                 log_error("Failed to parse reply.");
3778                                 goto finish;
3779                         }
3780
3781                         carries_install_info = b;
3782                 }
3783
3784                 if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
3785                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
3786                         log_error("Failed to parse reply.");
3787                         r = -EIO;
3788                         goto finish;
3789                 }
3790
3791                 dbus_message_iter_recurse(&iter, &sub);
3792                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
3793                         const char *type, *path, *source;
3794
3795                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
3796                                 log_error("Failed to parse reply.");
3797                                 r = -EIO;
3798                                 goto finish;
3799                         }
3800
3801                         dbus_message_iter_recurse(&sub, &sub2);
3802
3803                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
3804                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0 ||
3805                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &source, false) < 0) {
3806                                 log_error("Failed to parse reply.");
3807                                 r = -EIO;
3808                                 goto finish;
3809                         }
3810
3811                         if (streq(type, "symlink"))
3812                                 log_info("ln -s '%s' '%s'", source, path);
3813                         else
3814                                 log_info("rm '%s'", path);
3815
3816                         dbus_message_iter_next(&sub);
3817                 }
3818
3819                 /* Try to reload if enabeld */
3820                 if (!arg_no_reload)
3821                         r = daemon_reload(bus, args);
3822         }
3823
3824         if (carries_install_info == 0)
3825                 log_warning("Warning: unit files do not carry install information. No operation executed.");
3826
3827 finish:
3828         if (m)
3829                 dbus_message_unref(m);
3830
3831         if (reply)
3832                 dbus_message_unref(reply);
3833
3834         unit_file_changes_free(changes, n_changes);
3835
3836         dbus_error_free(&error);
3837         return r;
3838 }
3839
3840 static int unit_is_enabled(DBusConnection *bus, char **args) {
3841         DBusError error;
3842         int r;
3843         DBusMessage *m = NULL, *reply = NULL;
3844         bool enabled;
3845         char **name;
3846
3847         dbus_error_init(&error);
3848
3849         r = enable_sysv_units(args);
3850         if (r < 0)
3851                 return r;
3852
3853         enabled = r > 0;
3854
3855         if (!bus || avoid_bus()) {
3856
3857                 STRV_FOREACH(name, args+1) {
3858                         UnitFileState state;
3859
3860                         state = unit_file_get_state(arg_scope, arg_root, *name);
3861                         if (state < 0) {
3862                                 r = state;
3863                                 goto finish;
3864                         }
3865
3866                         if (state == UNIT_FILE_ENABLED ||
3867                             state == UNIT_FILE_ENABLED_RUNTIME ||
3868                             state == UNIT_FILE_STATIC)
3869                                 enabled = true;
3870
3871                         if (!arg_quiet)
3872                                 puts(unit_file_state_to_string(state));
3873                 }
3874
3875         } else {
3876                 STRV_FOREACH(name, args+1) {
3877                         const char *s;
3878
3879                         m = dbus_message_new_method_call(
3880                                         "org.freedesktop.systemd1",
3881                                         "/org/freedesktop/systemd1",
3882                                         "org.freedesktop.systemd1.Manager",
3883                                         "GetUnitFileState");
3884                         if (!m) {
3885                                 log_error("Out of memory");
3886                                 r = -ENOMEM;
3887                                 goto finish;
3888                         }
3889
3890                         if (!dbus_message_append_args(m,
3891                                                       DBUS_TYPE_STRING, name,
3892                                                       DBUS_TYPE_INVALID)) {
3893                                 log_error("Could not append arguments to message.");
3894                                 r = -ENOMEM;
3895                                 goto finish;
3896                         }
3897
3898                         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
3899                         if (!reply) {
3900                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3901                                 r = -EIO;
3902                                 goto finish;
3903                         }
3904
3905                         if (!dbus_message_get_args(reply, &error,
3906                                                    DBUS_TYPE_STRING, &s,
3907                                                    DBUS_TYPE_INVALID)) {
3908                                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3909                                 r = -EIO;
3910                                 goto finish;
3911                         }
3912
3913                         dbus_message_unref(m);
3914                         dbus_message_unref(reply);
3915                         m = reply = NULL;
3916
3917                         if (streq(s, "enabled") ||
3918                             streq(s, "enabled-runtime") ||
3919                             streq(s, "static"))
3920                                 enabled = true;
3921
3922                         if (!arg_quiet)
3923                                 puts(s);
3924                 }
3925         }
3926
3927         r = enabled ? 0 : 1;
3928
3929 finish:
3930         if (m)
3931                 dbus_message_unref(m);
3932
3933         if (reply)
3934                 dbus_message_unref(reply);
3935
3936         dbus_error_free(&error);
3937         return r;
3938 }
3939
3940 static int systemctl_help(void) {
3941
3942         pager_open_if_enabled();
3943
3944         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
3945                "Query or send control commands to the systemd manager.\n\n"
3946                "  -h --help           Show this help\n"
3947                "     --version        Show package version\n"
3948                "  -t --type=TYPE      List only units of a particular type\n"
3949                "  -p --property=NAME  Show only properties by this name\n"
3950                "  -a --all            Show all units/properties, including dead/empty ones\n"
3951                "     --failed         Show only failed units\n"
3952                "     --full           Don't ellipsize unit names on output\n"
3953                "     --fail           When queueing a new job, fail if conflicting jobs are\n"
3954                "                      pending\n"
3955                "     --ignore-dependencies\n"
3956                "                      When queueing a new job, ignore all its dependencies\n"
3957                "     --kill-who=WHO   Who to send signal to\n"
3958                "  -s --signal=SIGNAL  Which signal to send\n"
3959                "  -H --host=[USER@]HOST\n"
3960                "                      Show information for remote host\n"
3961                "  -P --privileged     Acquire privileges before execution\n"
3962                "  -q --quiet          Suppress output\n"
3963                "     --no-block       Do not wait until operation finished\n"
3964                "     --no-wall        Don't send wall message before halt/power-off/reboot\n"
3965                "     --no-reload      When enabling/disabling unit files, don't reload daemon\n"
3966                "                      configuration\n"
3967                "     --no-legend      Do not print a legend (column headers and hints)\n"
3968                "     --no-pager       Do not pipe output into a pager\n"
3969                "     --no-ask-password\n"
3970                "                      Do not ask for system passwords\n"
3971                "     --order          When generating graph for dot, show only order\n"
3972                "     --require        When generating graph for dot, show only requirement\n"
3973                "     --system         Connect to system manager\n"
3974                "     --user           Connect to user service manager\n"
3975                "     --global         Enable/disable unit files globally\n"
3976                "  -f --force          When enabling unit files, override existing symlinks\n"
3977                "                      When shutting down, execute action immediately\n"
3978                "     --root=PATH      Enable unit files in the specified root directory\n"
3979                "     --runtime        Enable unit files only temporarily until next reboot\n"
3980                "  -n --lines=INTEGER  Journal entries to show\n"
3981                "     --follow         Follow journal\n"
3982                "  -o --output=STRING  Change journal output mode (short, short-monotonic, verbose, export, json)\n\n"
3983                "Unit Commands:\n"
3984                "  list-units                      List loaded units\n"
3985                "  start [NAME...]                 Start (activate) one or more units\n"
3986                "  stop [NAME...]                  Stop (deactivate) one or more units\n"
3987                "  reload [NAME...]                Reload one or more units\n"
3988                "  restart [NAME...]               Start or restart one or more units\n"
3989                "  try-restart [NAME...]           Restart one or more units if active\n"
3990                "  reload-or-restart [NAME...]     Reload one or more units is possible,\n"
3991                "                                  otherwise start or restart\n"
3992                "  reload-or-try-restart [NAME...] Reload one or more units is possible,\n"
3993                "                                  otherwise restart if active\n"
3994                "  isolate [NAME]                  Start one unit and stop all others\n"
3995                "  kill [NAME...]                  Send signal to processes of a unit\n"
3996                "  is-active [NAME...]             Check whether units are active\n"
3997                "  status [NAME...|PID...]         Show runtime status of one or more units\n"
3998                "  show [NAME...|JOB...]           Show properties of one or more\n"
3999                "                                  units/jobs or the manager\n"
4000                "  reset-failed [NAME...]          Reset failed state for all, one, or more\n"
4001                "                                  units\n"
4002                "  load [NAME...]                  Load one or more units\n\n"
4003                "Unit File Commands:\n"
4004                "  list-unit-files                 List installed unit files\n"
4005                "  enable [NAME...]                Enable one or more unit files\n"
4006                "  disable [NAME...]               Disable one or more unit files\n"
4007                "  reenable [NAME...]              Reenable one or more unit files\n"
4008                "  preset [NAME...]                Enable/disable one or more unit files\n"
4009                "                                  based on preset configuration\n"
4010                "  mask [NAME...]                  Mask one or more units\n"
4011                "  unmask [NAME...]                Unmask one or more units\n"
4012                "  link [PATH...]                  Link one or more units files into\n"
4013                "                                  the search path\n"
4014                "  is-enabled [NAME...]            Check whether unit files are enabled\n\n"
4015                "Job Commands:\n"
4016                "  list-jobs                       List jobs\n"
4017                "  cancel [JOB...]                 Cancel all, one, or more jobs\n\n"
4018                "Status Commands:\n"
4019                "  dump                            Dump server status\n"
4020                "  dot                             Dump dependency graph for dot(1)\n\n"
4021                "Snapshot Commands:\n"
4022                "  snapshot [NAME]                 Create a snapshot\n"
4023                "  delete [NAME...]                Remove one or more snapshots\n\n"
4024                "Environment Commands:\n"
4025                "  show-environment                Dump environment\n"
4026                "  set-environment [NAME=VALUE...] Set one or more environment variables\n"
4027                "  unset-environment [NAME...]     Unset one or more environment variables\n\n"
4028                "Manager Lifecycle Commands:\n"
4029                "  daemon-reload                   Reload systemd manager configuration\n"
4030                "  daemon-reexec                   Reexecute systemd manager\n\n"
4031                "System Commands:\n"
4032                "  default                         Enter system default mode\n"
4033                "  rescue                          Enter system rescue mode\n"
4034                "  emergency                       Enter system emergency mode\n"
4035                "  halt                            Shut down and halt the system\n"
4036                "  poweroff                        Shut down and power-off the system\n"
4037                "  reboot                          Shut down and reboot the system\n"
4038                "  kexec                           Shut down and reboot the system with kexec\n"
4039                "  exit                            Ask for user instance termination\n",
4040                program_invocation_short_name);
4041
4042         return 0;
4043 }
4044
4045 static int halt_help(void) {
4046
4047         printf("%s [OPTIONS...]\n\n"
4048                "%s the system.\n\n"
4049                "     --help      Show this help\n"
4050                "     --halt      Halt the machine\n"
4051                "  -p --poweroff  Switch off the machine\n"
4052                "     --reboot    Reboot the machine\n"
4053                "  -f --force     Force immediate halt/power-off/reboot\n"
4054                "  -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record\n"
4055                "  -d --no-wtmp   Don't write wtmp record\n"
4056                "  -n --no-sync   Don't sync before halt/power-off/reboot\n"
4057                "     --no-wall   Don't send wall message before halt/power-off/reboot\n",
4058                program_invocation_short_name,
4059                arg_action == ACTION_REBOOT   ? "Reboot" :
4060                arg_action == ACTION_POWEROFF ? "Power off" :
4061                                                "Halt");
4062
4063         return 0;
4064 }
4065
4066 static int shutdown_help(void) {
4067
4068         printf("%s [OPTIONS...] [TIME] [WALL...]\n\n"
4069                "Shut down the system.\n\n"
4070                "     --help      Show this help\n"
4071                "  -H --halt      Halt the machine\n"
4072                "  -P --poweroff  Power-off the machine\n"
4073                "  -r --reboot    Reboot the machine\n"
4074                "  -h             Equivalent to --poweroff, overriden by --halt\n"
4075                "  -k             Don't halt/power-off/reboot, just send warnings\n"
4076                "     --no-wall   Don't send wall message before halt/power-off/reboot\n"
4077                "  -c             Cancel a pending shutdown\n",
4078                program_invocation_short_name);
4079
4080         return 0;
4081 }
4082
4083 static int telinit_help(void) {
4084
4085         printf("%s [OPTIONS...] {COMMAND}\n\n"
4086                "Send control commands to the init daemon.\n\n"
4087                "     --help      Show this help\n"
4088                "     --no-wall   Don't send wall message before halt/power-off/reboot\n\n"
4089                "Commands:\n"
4090                "  0              Power-off the machine\n"
4091                "  6              Reboot the machine\n"
4092                "  2, 3, 4, 5     Start runlevelX.target unit\n"
4093                "  1, s, S        Enter rescue mode\n"
4094                "  q, Q           Reload init daemon configuration\n"
4095                "  u, U           Reexecute init daemon\n",
4096                program_invocation_short_name);
4097
4098         return 0;
4099 }
4100
4101 static int runlevel_help(void) {
4102
4103         printf("%s [OPTIONS...]\n\n"
4104                "Prints the previous and current runlevel of the init system.\n\n"
4105                "     --help      Show this help\n",
4106                program_invocation_short_name);
4107
4108         return 0;
4109 }
4110
4111 static int systemctl_parse_argv(int argc, char *argv[]) {
4112
4113         enum {
4114                 ARG_FAIL = 0x100,
4115                 ARG_IGNORE_DEPENDENCIES,
4116                 ARG_VERSION,
4117                 ARG_USER,
4118                 ARG_SYSTEM,
4119                 ARG_GLOBAL,
4120                 ARG_NO_BLOCK,
4121                 ARG_NO_LEGEND,
4122                 ARG_NO_PAGER,
4123                 ARG_NO_WALL,
4124                 ARG_ORDER,
4125                 ARG_REQUIRE,
4126                 ARG_ROOT,
4127                 ARG_FULL,
4128                 ARG_NO_RELOAD,
4129                 ARG_KILL_MODE,
4130                 ARG_KILL_WHO,
4131                 ARG_NO_ASK_PASSWORD,
4132                 ARG_FAILED,
4133                 ARG_RUNTIME,
4134                 ARG_FOLLOW
4135         };
4136
4137         static const struct option options[] = {
4138                 { "help",      no_argument,       NULL, 'h'           },
4139                 { "version",   no_argument,       NULL, ARG_VERSION   },
4140                 { "type",      required_argument, NULL, 't'           },
4141                 { "property",  required_argument, NULL, 'p'           },
4142                 { "all",       no_argument,       NULL, 'a'           },
4143                 { "failed",    no_argument,       NULL, ARG_FAILED    },
4144                 { "full",      no_argument,       NULL, ARG_FULL      },
4145                 { "fail",      no_argument,       NULL, ARG_FAIL      },
4146                 { "ignore-dependencies", no_argument, NULL, ARG_IGNORE_DEPENDENCIES },
4147                 { "user",      no_argument,       NULL, ARG_USER      },
4148                 { "system",    no_argument,       NULL, ARG_SYSTEM    },
4149                 { "global",    no_argument,       NULL, ARG_GLOBAL    },
4150                 { "no-block",  no_argument,       NULL, ARG_NO_BLOCK  },
4151                 { "no-legend", no_argument,       NULL, ARG_NO_LEGEND },
4152                 { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
4153                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL   },
4154                 { "quiet",     no_argument,       NULL, 'q'           },
4155                 { "order",     no_argument,       NULL, ARG_ORDER     },
4156                 { "require",   no_argument,       NULL, ARG_REQUIRE   },
4157                 { "root",      required_argument, NULL, ARG_ROOT      },
4158                 { "force",     no_argument,       NULL, 'f'           },
4159                 { "no-reload", no_argument,       NULL, ARG_NO_RELOAD },
4160                 { "kill-mode", required_argument, NULL, ARG_KILL_MODE }, /* undocumented on purpose */
4161                 { "kill-who",  required_argument, NULL, ARG_KILL_WHO  },
4162                 { "signal",    required_argument, NULL, 's'           },
4163                 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
4164                 { "host",      required_argument, NULL, 'H'           },
4165                 { "privileged",no_argument,       NULL, 'P'           },
4166                 { "runtime",   no_argument,       NULL, ARG_RUNTIME   },
4167                 { "lines",     required_argument, NULL, 'n'           },
4168                 { "follow",    no_argument,       NULL, ARG_FOLLOW    },
4169                 { "output",    required_argument, NULL, 'o'           },
4170                 { NULL,        0,                 NULL, 0             }
4171         };
4172
4173         int c;
4174
4175         assert(argc >= 0);
4176         assert(argv);
4177
4178         /* Only when running as systemctl we ask for passwords */
4179         arg_ask_password = true;
4180
4181         while ((c = getopt_long(argc, argv, "ht:p:aqfs:H:Pn:o:", options, NULL)) >= 0) {
4182
4183                 switch (c) {
4184
4185                 case 'h':
4186                         systemctl_help();
4187                         return 0;
4188
4189                 case ARG_VERSION:
4190                         puts(PACKAGE_STRING);
4191                         puts(DISTRIBUTION);
4192                         puts(SYSTEMD_FEATURES);
4193                         return 0;
4194
4195                 case 't':
4196                         arg_type = optarg;
4197                         break;
4198
4199                 case 'p': {
4200                         char **l;
4201
4202                         if (!(l = strv_append(arg_property, optarg)))
4203                                 return -ENOMEM;
4204
4205                         strv_free(arg_property);
4206                         arg_property = l;
4207
4208                         /* If the user asked for a particular
4209                          * property, show it to him, even if it is
4210                          * empty. */
4211                         arg_all = true;
4212                         break;
4213                 }
4214
4215                 case 'a':
4216                         arg_all = true;
4217                         break;
4218
4219                 case ARG_FAIL:
4220                         arg_job_mode = "fail";
4221                         break;
4222
4223                 case ARG_IGNORE_DEPENDENCIES:
4224                         arg_job_mode = "ignore-dependencies";
4225                         break;
4226
4227                 case ARG_USER:
4228                         arg_scope = UNIT_FILE_USER;
4229                         break;
4230
4231                 case ARG_SYSTEM:
4232                         arg_scope = UNIT_FILE_SYSTEM;
4233                         break;
4234
4235                 case ARG_GLOBAL:
4236                         arg_scope = UNIT_FILE_GLOBAL;
4237                         break;
4238
4239                 case ARG_NO_BLOCK:
4240                         arg_no_block = true;
4241                         break;
4242
4243                 case ARG_NO_LEGEND:
4244                         arg_no_legend = true;
4245                         break;
4246
4247                 case ARG_NO_PAGER:
4248                         arg_no_pager = true;
4249                         break;
4250
4251                 case ARG_NO_WALL:
4252                         arg_no_wall = true;
4253                         break;
4254
4255                 case ARG_ORDER:
4256                         arg_dot = DOT_ORDER;
4257                         break;
4258
4259                 case ARG_REQUIRE:
4260                         arg_dot = DOT_REQUIRE;
4261                         break;
4262
4263                 case ARG_ROOT:
4264                         arg_root = optarg;
4265                         break;
4266
4267                 case ARG_FULL:
4268                         arg_full = true;
4269                         break;
4270
4271                 case ARG_FAILED:
4272                         arg_failed = true;
4273                         break;
4274
4275                 case 'q':
4276                         arg_quiet = true;
4277                         break;
4278
4279                 case 'f':
4280                         arg_force = true;
4281                         break;
4282
4283                 case ARG_NO_RELOAD:
4284                         arg_no_reload = true;
4285                         break;
4286
4287                 case ARG_KILL_WHO:
4288                         arg_kill_who = optarg;
4289                         break;
4290
4291                 case ARG_KILL_MODE:
4292                         arg_kill_mode = optarg;
4293                         break;
4294
4295                 case 's':
4296                         if ((arg_signal = signal_from_string_try_harder(optarg)) < 0) {
4297                                 log_error("Failed to parse signal string %s.", optarg);
4298                                 return -EINVAL;
4299                         }
4300                         break;
4301
4302                 case ARG_NO_ASK_PASSWORD:
4303                         arg_ask_password = false;
4304                         break;
4305
4306                 case 'P':
4307                         arg_transport = TRANSPORT_POLKIT;
4308                         break;
4309
4310                 case 'H':
4311                         arg_transport = TRANSPORT_SSH;
4312                         arg_host = optarg;
4313                         break;
4314
4315                 case ARG_RUNTIME:
4316                         arg_runtime = true;
4317                         break;
4318
4319                 case 'n':
4320                         if (safe_atou(optarg, &arg_lines) < 0) {
4321                                 log_error("Failed to parse lines '%s'", optarg);
4322                                 return -EINVAL;
4323                         }
4324                         break;
4325
4326                 case ARG_FOLLOW:
4327                         arg_follow = true;
4328                         break;
4329
4330                 case 'o':
4331                         arg_output = output_mode_from_string(optarg);
4332                         if (arg_output < 0) {
4333                                 log_error("Unknown output '%s'.", optarg);
4334                                 return -EINVAL;
4335                         }
4336                         break;
4337
4338                 case '?':
4339                         return -EINVAL;
4340
4341                 default:
4342                         log_error("Unknown option code %c", c);
4343                         return -EINVAL;
4344                 }
4345         }
4346
4347         if (arg_transport != TRANSPORT_NORMAL && arg_scope != UNIT_FILE_SYSTEM) {
4348                 log_error("Cannot access user instance remotely.");
4349                 return -EINVAL;
4350         }
4351
4352         return 1;
4353 }
4354
4355 static int halt_parse_argv(int argc, char *argv[]) {
4356
4357         enum {
4358                 ARG_HELP = 0x100,
4359                 ARG_HALT,
4360                 ARG_REBOOT,
4361                 ARG_NO_WALL
4362         };
4363
4364         static const struct option options[] = {
4365                 { "help",      no_argument,       NULL, ARG_HELP    },
4366                 { "halt",      no_argument,       NULL, ARG_HALT    },
4367                 { "poweroff",  no_argument,       NULL, 'p'         },
4368                 { "reboot",    no_argument,       NULL, ARG_REBOOT  },
4369                 { "force",     no_argument,       NULL, 'f'         },
4370                 { "wtmp-only", no_argument,       NULL, 'w'         },
4371                 { "no-wtmp",   no_argument,       NULL, 'd'         },
4372                 { "no-sync",   no_argument,       NULL, 'n'         },
4373                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4374                 { NULL,        0,                 NULL, 0           }
4375         };
4376
4377         int c, runlevel;
4378
4379         assert(argc >= 0);
4380         assert(argv);
4381
4382         if (utmp_get_runlevel(&runlevel, NULL) >= 0)
4383                 if (runlevel == '0' || runlevel == '6')
4384                         arg_immediate = true;
4385
4386         while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) {
4387                 switch (c) {
4388
4389                 case ARG_HELP:
4390                         halt_help();
4391                         return 0;
4392
4393                 case ARG_HALT:
4394                         arg_action = ACTION_HALT;
4395                         break;
4396
4397                 case 'p':
4398                         if (arg_action != ACTION_REBOOT)
4399                                 arg_action = ACTION_POWEROFF;
4400                         break;
4401
4402                 case ARG_REBOOT:
4403                         arg_action = ACTION_REBOOT;
4404                         break;
4405
4406                 case 'f':
4407                         arg_immediate = true;
4408                         break;
4409
4410                 case 'w':
4411                         arg_dry = true;
4412                         break;
4413
4414                 case 'd':
4415                         arg_no_wtmp = true;
4416                         break;
4417
4418                 case 'n':
4419                         arg_no_sync = true;
4420                         break;
4421
4422                 case ARG_NO_WALL:
4423                         arg_no_wall = true;
4424                         break;
4425
4426                 case 'i':
4427                 case 'h':
4428                         /* Compatibility nops */
4429                         break;
4430
4431                 case '?':
4432                         return -EINVAL;
4433
4434                 default:
4435                         log_error("Unknown option code %c", c);
4436                         return -EINVAL;
4437                 }
4438         }
4439
4440         if (optind < argc) {
4441                 log_error("Too many arguments.");
4442                 return -EINVAL;
4443         }
4444
4445         return 1;
4446 }
4447
4448 static int parse_time_spec(const char *t, usec_t *_u) {
4449         assert(t);
4450         assert(_u);
4451
4452         if (streq(t, "now"))
4453                 *_u = 0;
4454         else if (!strchr(t, ':')) {
4455                 uint64_t u;
4456
4457                 if (safe_atou64(t, &u) < 0)
4458                         return -EINVAL;
4459
4460                 *_u = now(CLOCK_REALTIME) + USEC_PER_MINUTE * u;
4461         } else {
4462                 char *e = NULL;
4463                 long hour, minute;
4464                 struct tm tm;
4465                 time_t s;
4466                 usec_t n;
4467
4468                 errno = 0;
4469                 hour = strtol(t, &e, 10);
4470                 if (errno != 0 || *e != ':' || hour < 0 || hour > 23)
4471                         return -EINVAL;
4472
4473                 minute = strtol(e+1, &e, 10);
4474                 if (errno != 0 || *e != 0 || minute < 0 || minute > 59)
4475                         return -EINVAL;
4476
4477                 n = now(CLOCK_REALTIME);
4478                 s = (time_t) (n / USEC_PER_SEC);
4479
4480                 zero(tm);
4481                 assert_se(localtime_r(&s, &tm));
4482
4483                 tm.tm_hour = (int) hour;
4484                 tm.tm_min = (int) minute;
4485                 tm.tm_sec = 0;
4486
4487                 assert_se(s = mktime(&tm));
4488
4489                 *_u = (usec_t) s * USEC_PER_SEC;
4490
4491                 while (*_u <= n)
4492                         *_u += USEC_PER_DAY;
4493         }
4494
4495         return 0;
4496 }
4497
4498 static int shutdown_parse_argv(int argc, char *argv[]) {
4499
4500         enum {
4501                 ARG_HELP = 0x100,
4502                 ARG_NO_WALL
4503         };
4504
4505         static const struct option options[] = {
4506                 { "help",      no_argument,       NULL, ARG_HELP    },
4507                 { "halt",      no_argument,       NULL, 'H'         },
4508                 { "poweroff",  no_argument,       NULL, 'P'         },
4509                 { "reboot",    no_argument,       NULL, 'r'         },
4510                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4511                 { NULL,        0,                 NULL, 0           }
4512         };
4513
4514         int c, r;
4515
4516         assert(argc >= 0);
4517         assert(argv);
4518
4519         while ((c = getopt_long(argc, argv, "HPrhkt:afFc", options, NULL)) >= 0) {
4520                 switch (c) {
4521
4522                 case ARG_HELP:
4523                         shutdown_help();
4524                         return 0;
4525
4526                 case 'H':
4527                         arg_action = ACTION_HALT;
4528                         break;
4529
4530                 case 'P':
4531                         arg_action = ACTION_POWEROFF;
4532                         break;
4533
4534                 case 'r':
4535                         if (kexec_loaded())
4536                                 arg_action = ACTION_KEXEC;
4537                         else
4538                                 arg_action = ACTION_REBOOT;
4539                         break;
4540
4541                 case 'h':
4542                         if (arg_action != ACTION_HALT)
4543                                 arg_action = ACTION_POWEROFF;
4544                         break;
4545
4546                 case 'k':
4547                         arg_dry = true;
4548                         break;
4549
4550                 case ARG_NO_WALL:
4551                         arg_no_wall = true;
4552                         break;
4553
4554                 case 't':
4555                 case 'a':
4556                         /* Compatibility nops */
4557                         break;
4558
4559                 case 'c':
4560                         arg_action = ACTION_CANCEL_SHUTDOWN;
4561                         break;
4562
4563                 case '?':
4564                         return -EINVAL;
4565
4566                 default:
4567                         log_error("Unknown option code %c", c);
4568                         return -EINVAL;
4569                 }
4570         }
4571
4572         if (argc > optind) {
4573                 if ((r = parse_time_spec(argv[optind], &arg_when)) < 0) {
4574                         log_error("Failed to parse time specification: %s", argv[optind]);
4575                         return r;
4576                 }
4577         } else
4578                 arg_when = now(CLOCK_REALTIME) + USEC_PER_MINUTE;
4579
4580         /* We skip the time argument */
4581         if (argc > optind + 1)
4582                 arg_wall = argv + optind + 1;
4583
4584         optind = argc;
4585
4586         return 1;
4587 }
4588
4589 static int telinit_parse_argv(int argc, char *argv[]) {
4590
4591         enum {
4592                 ARG_HELP = 0x100,
4593                 ARG_NO_WALL
4594         };
4595
4596         static const struct option options[] = {
4597                 { "help",      no_argument,       NULL, ARG_HELP    },
4598                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4599                 { NULL,        0,                 NULL, 0           }
4600         };
4601
4602         static const struct {
4603                 char from;
4604                 enum action to;
4605         } table[] = {
4606                 { '0', ACTION_POWEROFF },
4607                 { '6', ACTION_REBOOT },
4608                 { '1', ACTION_RESCUE },
4609                 { '2', ACTION_RUNLEVEL2 },
4610                 { '3', ACTION_RUNLEVEL3 },
4611                 { '4', ACTION_RUNLEVEL4 },
4612                 { '5', ACTION_RUNLEVEL5 },
4613                 { 's', ACTION_RESCUE },
4614                 { 'S', ACTION_RESCUE },
4615                 { 'q', ACTION_RELOAD },
4616                 { 'Q', ACTION_RELOAD },
4617                 { 'u', ACTION_REEXEC },
4618                 { 'U', ACTION_REEXEC }
4619         };
4620
4621         unsigned i;
4622         int c;
4623
4624         assert(argc >= 0);
4625         assert(argv);
4626
4627         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
4628                 switch (c) {
4629
4630                 case ARG_HELP:
4631                         telinit_help();
4632                         return 0;
4633
4634                 case ARG_NO_WALL:
4635                         arg_no_wall = true;
4636                         break;
4637
4638                 case '?':
4639                         return -EINVAL;
4640
4641                 default:
4642                         log_error("Unknown option code %c", c);
4643                         return -EINVAL;
4644                 }
4645         }
4646
4647         if (optind >= argc) {
4648                 telinit_help();
4649                 return -EINVAL;
4650         }
4651
4652         if (optind + 1 < argc) {
4653                 log_error("Too many arguments.");
4654                 return -EINVAL;
4655         }
4656
4657         if (strlen(argv[optind]) != 1) {
4658                 log_error("Expected single character argument.");
4659                 return -EINVAL;
4660         }
4661
4662         for (i = 0; i < ELEMENTSOF(table); i++)
4663                 if (table[i].from == argv[optind][0])
4664                         break;
4665
4666         if (i >= ELEMENTSOF(table)) {
4667                 log_error("Unknown command %s.", argv[optind]);
4668                 return -EINVAL;
4669         }
4670
4671         arg_action = table[i].to;
4672
4673         optind ++;
4674
4675         return 1;
4676 }
4677
4678 static int runlevel_parse_argv(int argc, char *argv[]) {
4679
4680         enum {
4681                 ARG_HELP = 0x100,
4682         };
4683
4684         static const struct option options[] = {
4685                 { "help",      no_argument,       NULL, ARG_HELP    },
4686                 { NULL,        0,                 NULL, 0           }
4687         };
4688
4689         int c;
4690
4691         assert(argc >= 0);
4692         assert(argv);
4693
4694         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
4695                 switch (c) {
4696
4697                 case ARG_HELP:
4698                         runlevel_help();
4699                         return 0;
4700
4701                 case '?':
4702                         return -EINVAL;
4703
4704                 default:
4705                         log_error("Unknown option code %c", c);
4706                         return -EINVAL;
4707                 }
4708         }
4709
4710         if (optind < argc) {
4711                 log_error("Too many arguments.");
4712                 return -EINVAL;
4713         }
4714
4715         return 1;
4716 }
4717
4718 static int parse_argv(int argc, char *argv[]) {
4719         assert(argc >= 0);
4720         assert(argv);
4721
4722         if (program_invocation_short_name) {
4723
4724                 if (strstr(program_invocation_short_name, "halt")) {
4725                         arg_action = ACTION_HALT;
4726                         return halt_parse_argv(argc, argv);
4727                 } else if (strstr(program_invocation_short_name, "poweroff")) {
4728                         arg_action = ACTION_POWEROFF;
4729                         return halt_parse_argv(argc, argv);
4730                 } else if (strstr(program_invocation_short_name, "reboot")) {
4731                         if (kexec_loaded())
4732                                 arg_action = ACTION_KEXEC;
4733                         else
4734                                 arg_action = ACTION_REBOOT;
4735                         return halt_parse_argv(argc, argv);
4736                 } else if (strstr(program_invocation_short_name, "shutdown")) {
4737                         arg_action = ACTION_POWEROFF;
4738                         return shutdown_parse_argv(argc, argv);
4739                 } else if (strstr(program_invocation_short_name, "init")) {
4740
4741                         if (sd_booted() > 0) {
4742                                 arg_action = ACTION_INVALID;
4743                                 return telinit_parse_argv(argc, argv);
4744                         } else {
4745                                 /* Hmm, so some other init system is
4746                                  * running, we need to forward this
4747                                  * request to it. For now we simply
4748                                  * guess that it is Upstart. */
4749
4750                                 execv("/lib/upstart/telinit", argv);
4751
4752                                 log_error("Couldn't find an alternative telinit implementation to spawn.");
4753                                 return -EIO;
4754                         }
4755
4756                 } else if (strstr(program_invocation_short_name, "runlevel")) {
4757                         arg_action = ACTION_RUNLEVEL;
4758                         return runlevel_parse_argv(argc, argv);
4759                 }
4760         }
4761
4762         arg_action = ACTION_SYSTEMCTL;
4763         return systemctl_parse_argv(argc, argv);
4764 }
4765
4766 static int action_to_runlevel(void) {
4767
4768         static const char table[_ACTION_MAX] = {
4769                 [ACTION_HALT] =      '0',
4770                 [ACTION_POWEROFF] =  '0',
4771                 [ACTION_REBOOT] =    '6',
4772                 [ACTION_RUNLEVEL2] = '2',
4773                 [ACTION_RUNLEVEL3] = '3',
4774                 [ACTION_RUNLEVEL4] = '4',
4775                 [ACTION_RUNLEVEL5] = '5',
4776                 [ACTION_RESCUE] =    '1'
4777         };
4778
4779         assert(arg_action < _ACTION_MAX);
4780
4781         return table[arg_action];
4782 }
4783
4784 static int talk_upstart(void) {
4785         DBusMessage *m = NULL, *reply = NULL;
4786         DBusError error;
4787         int previous, rl, r;
4788         char
4789                 env1_buf[] = "RUNLEVEL=X",
4790                 env2_buf[] = "PREVLEVEL=X";
4791         char *env1 = env1_buf, *env2 = env2_buf;
4792         const char *emit = "runlevel";
4793         dbus_bool_t b_false = FALSE;
4794         DBusMessageIter iter, sub;
4795         DBusConnection *bus;
4796
4797         dbus_error_init(&error);
4798
4799         if (!(rl = action_to_runlevel()))
4800                 return 0;
4801
4802         if (utmp_get_runlevel(&previous, NULL) < 0)
4803                 previous = 'N';
4804
4805         if (!(bus = dbus_connection_open_private("unix:abstract=/com/ubuntu/upstart", &error))) {
4806                 if (dbus_error_has_name(&error, DBUS_ERROR_NO_SERVER)) {
4807                         r = 0;
4808                         goto finish;
4809                 }
4810
4811                 log_error("Failed to connect to Upstart bus: %s", bus_error_message(&error));
4812                 r = -EIO;
4813                 goto finish;
4814         }
4815
4816         if ((r = bus_check_peercred(bus)) < 0) {
4817                 log_error("Failed to verify owner of bus.");
4818                 goto finish;
4819         }
4820
4821         if (!(m = dbus_message_new_method_call(
4822                               "com.ubuntu.Upstart",
4823                               "/com/ubuntu/Upstart",
4824                               "com.ubuntu.Upstart0_6",
4825                               "EmitEvent"))) {
4826
4827                 log_error("Could not allocate message.");
4828                 r = -ENOMEM;
4829                 goto finish;
4830         }
4831
4832         dbus_message_iter_init_append(m, &iter);
4833
4834         env1_buf[sizeof(env1_buf)-2] = rl;
4835         env2_buf[sizeof(env2_buf)-2] = previous;
4836
4837         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &emit) ||
4838             !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub) ||
4839             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env1) ||
4840             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env2) ||
4841             !dbus_message_iter_close_container(&iter, &sub) ||
4842             !dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b_false)) {
4843                 log_error("Could not append arguments to message.");
4844                 r = -ENOMEM;
4845                 goto finish;
4846         }
4847
4848         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
4849
4850                 if (error_is_no_service(&error)) {
4851                         r = -EADDRNOTAVAIL;
4852                         goto finish;
4853                 }
4854
4855                 log_error("Failed to issue method call: %s", bus_error_message(&error));
4856                 r = -EIO;
4857                 goto finish;
4858         }
4859
4860         r = 1;
4861
4862 finish:
4863         if (m)
4864                 dbus_message_unref(m);
4865
4866         if (reply)
4867                 dbus_message_unref(reply);
4868
4869         if (bus) {
4870                 dbus_connection_flush(bus);
4871                 dbus_connection_close(bus);
4872                 dbus_connection_unref(bus);
4873         }
4874
4875         dbus_error_free(&error);
4876
4877         return r;
4878 }
4879
4880 static int talk_initctl(void) {
4881         struct init_request request;
4882         int r, fd;
4883         char rl;
4884
4885         if (!(rl = action_to_runlevel()))
4886                 return 0;
4887
4888         zero(request);
4889         request.magic = INIT_MAGIC;
4890         request.sleeptime = 0;
4891         request.cmd = INIT_CMD_RUNLVL;
4892         request.runlevel = rl;
4893
4894         if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 0) {
4895
4896                 if (errno == ENOENT)
4897                         return 0;
4898
4899                 log_error("Failed to open "INIT_FIFO": %m");
4900                 return -errno;
4901         }
4902
4903         errno = 0;
4904         r = loop_write(fd, &request, sizeof(request), false) != sizeof(request);
4905         close_nointr_nofail(fd);
4906
4907         if (r < 0) {
4908                 log_error("Failed to write to "INIT_FIFO": %m");
4909                 return errno ? -errno : -EIO;
4910         }
4911
4912         return 1;
4913 }
4914
4915 static int systemctl_main(DBusConnection *bus, int argc, char *argv[], DBusError *error) {
4916
4917         static const struct {
4918                 const char* verb;
4919                 const enum {
4920                         MORE,
4921                         LESS,
4922                         EQUAL
4923                 } argc_cmp;
4924                 const int argc;
4925                 int (* const dispatch)(DBusConnection *bus, char **args);
4926         } verbs[] = {
4927                 { "list-units",            LESS,  1, list_units        },
4928                 { "list-unit-files",       EQUAL, 1, list_unit_files   },
4929                 { "list-jobs",             EQUAL, 1, list_jobs         },
4930                 { "clear-jobs",            EQUAL, 1, daemon_reload     },
4931                 { "load",                  MORE,  2, load_unit         },
4932                 { "cancel",                MORE,  2, cancel_job        },
4933                 { "start",                 MORE,  2, start_unit        },
4934                 { "stop",                  MORE,  2, start_unit        },
4935                 { "condstop",              MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
4936                 { "reload",                MORE,  2, start_unit        },
4937                 { "restart",               MORE,  2, start_unit        },
4938                 { "try-restart",           MORE,  2, start_unit        },
4939                 { "reload-or-restart",     MORE,  2, start_unit        },
4940                 { "reload-or-try-restart", MORE,  2, start_unit        },
4941                 { "force-reload",          MORE,  2, start_unit        }, /* For compatibility with SysV */
4942                 { "condreload",            MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
4943                 { "condrestart",           MORE,  2, start_unit        }, /* For compatibility with RH */
4944                 { "isolate",               EQUAL, 2, start_unit        },
4945                 { "kill",                  MORE,  2, kill_unit         },
4946                 { "is-active",             MORE,  2, check_unit        },
4947                 { "check",                 MORE,  2, check_unit        },
4948                 { "show",                  MORE,  1, show              },
4949                 { "status",                MORE,  2, show              },
4950                 { "dump",                  EQUAL, 1, dump              },
4951                 { "dot",                   EQUAL, 1, dot               },
4952                 { "snapshot",              LESS,  2, snapshot          },
4953                 { "delete",                MORE,  2, delete_snapshot   },
4954                 { "daemon-reload",         EQUAL, 1, daemon_reload     },
4955                 { "daemon-reexec",         EQUAL, 1, daemon_reload     },
4956                 { "show-environment",      EQUAL, 1, show_enviroment   },
4957                 { "set-environment",       MORE,  2, set_environment   },
4958                 { "unset-environment",     MORE,  2, set_environment   },
4959                 { "halt",                  EQUAL, 1, start_special     },
4960                 { "poweroff",              EQUAL, 1, start_special     },
4961                 { "reboot",                EQUAL, 1, start_special     },
4962                 { "kexec",                 EQUAL, 1, start_special     },
4963                 { "default",               EQUAL, 1, start_special     },
4964                 { "rescue",                EQUAL, 1, start_special     },
4965                 { "emergency",             EQUAL, 1, start_special     },
4966                 { "exit",                  EQUAL, 1, start_special     },
4967                 { "reset-failed",          MORE,  1, reset_failed      },
4968                 { "enable",                MORE,  2, enable_unit       },
4969                 { "disable",               MORE,  2, enable_unit       },
4970                 { "is-enabled",            MORE,  2, unit_is_enabled   },
4971                 { "reenable",              MORE,  2, enable_unit       },
4972                 { "preset",                MORE,  2, enable_unit       },
4973                 { "mask",                  MORE,  2, enable_unit       },
4974                 { "unmask",                MORE,  2, enable_unit       },
4975                 { "link",                  MORE,  2, enable_unit       }
4976         };
4977
4978         int left;
4979         unsigned i;
4980
4981         assert(argc >= 0);
4982         assert(argv);
4983         assert(error);
4984
4985         left = argc - optind;
4986
4987         if (left <= 0)
4988                 /* Special rule: no arguments means "list-units" */
4989                 i = 0;
4990         else {
4991                 if (streq(argv[optind], "help")) {
4992                         systemctl_help();
4993                         return 0;
4994                 }
4995
4996                 for (i = 0; i < ELEMENTSOF(verbs); i++)
4997                         if (streq(argv[optind], verbs[i].verb))
4998                                 break;
4999
5000                 if (i >= ELEMENTSOF(verbs)) {
5001                         log_error("Unknown operation %s", argv[optind]);
5002                         return -EINVAL;
5003                 }
5004         }
5005
5006         switch (verbs[i].argc_cmp) {
5007
5008         case EQUAL:
5009                 if (left != verbs[i].argc) {
5010                         log_error("Invalid number of arguments.");
5011                         return -EINVAL;
5012                 }
5013
5014                 break;
5015
5016         case MORE:
5017                 if (left < verbs[i].argc) {
5018                         log_error("Too few arguments.");
5019                         return -EINVAL;
5020                 }
5021
5022                 break;
5023
5024         case LESS:
5025                 if (left > verbs[i].argc) {
5026                         log_error("Too many arguments.");
5027                         return -EINVAL;
5028                 }
5029
5030                 break;
5031
5032         default:
5033                 assert_not_reached("Unknown comparison operator.");
5034         }
5035
5036         /* Require a bus connection for all operations but
5037          * enable/disable */
5038         if (!streq(verbs[i].verb, "enable") &&
5039             !streq(verbs[i].verb, "disable") &&
5040             !streq(verbs[i].verb, "is-enabled") &&
5041             !streq(verbs[i].verb, "list-unit-files") &&
5042             !streq(verbs[i].verb, "reenable") &&
5043             !streq(verbs[i].verb, "preset") &&
5044             !streq(verbs[i].verb, "mask") &&
5045             !streq(verbs[i].verb, "unmask") &&
5046             !streq(verbs[i].verb, "link")) {
5047
5048                 if (running_in_chroot() > 0) {
5049                         log_info("Running in chroot, ignoring request.");
5050                         return 0;
5051                 }
5052
5053                 if (!bus) {
5054                         log_error("Failed to get D-Bus connection: %s",
5055                                   dbus_error_is_set(error) ? error->message : "No connection to service manager.");
5056                         return -EIO;
5057                 }
5058
5059         } else {
5060
5061                 if (!bus && !avoid_bus()) {
5062                         log_error("Failed to get D-Bus connection: %s",
5063                                   dbus_error_is_set(error) ? error->message : "No connection to service manager.");
5064                         return -EIO;
5065                 }
5066         }
5067
5068         return verbs[i].dispatch(bus, argv + optind);
5069 }
5070
5071 static int send_shutdownd(usec_t t, char mode, bool dry_run, bool warn, const char *message) {
5072         int fd = -1;
5073         struct msghdr msghdr;
5074         struct iovec iovec;
5075         union sockaddr_union sockaddr;
5076         struct shutdownd_command c;
5077
5078         zero(c);
5079         c.elapse = t;
5080         c.mode = mode;
5081         c.dry_run = dry_run;
5082         c.warn_wall = warn;
5083
5084         if (message)
5085                 strncpy(c.wall_message, message, sizeof(c.wall_message));
5086
5087         if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0)
5088                 return -errno;
5089
5090         zero(sockaddr);
5091         sockaddr.sa.sa_family = AF_UNIX;
5092         sockaddr.un.sun_path[0] = 0;
5093         strncpy(sockaddr.un.sun_path, "/run/systemd/shutdownd", sizeof(sockaddr.un.sun_path));
5094
5095         zero(iovec);
5096         iovec.iov_base = (char*) &c;
5097         iovec.iov_len = sizeof(c);
5098
5099         zero(msghdr);
5100         msghdr.msg_name = &sockaddr;
5101         msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/systemd/shutdownd") - 1;
5102
5103         msghdr.msg_iov = &iovec;
5104         msghdr.msg_iovlen = 1;
5105
5106         if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0) {
5107                 close_nointr_nofail(fd);
5108                 return -errno;
5109         }
5110
5111         close_nointr_nofail(fd);
5112         return 0;
5113 }
5114
5115 static int reload_with_fallback(DBusConnection *bus) {
5116
5117         if (bus) {
5118                 /* First, try systemd via D-Bus. */
5119                 if (daemon_reload(bus, NULL) >= 0)
5120                         return 0;
5121         }
5122
5123         /* Nothing else worked, so let's try signals */
5124         assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC);
5125
5126         if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) {
5127                 log_error("kill() failed: %m");
5128                 return -errno;
5129         }
5130
5131         return 0;
5132 }
5133
5134 static int start_with_fallback(DBusConnection *bus) {
5135
5136         if (bus) {
5137                 /* First, try systemd via D-Bus. */
5138                 if (start_unit(bus, NULL) >= 0)
5139                         goto done;
5140         }
5141
5142         /* Hmm, talking to systemd via D-Bus didn't work. Then
5143          * let's try to talk to Upstart via D-Bus. */
5144         if (talk_upstart() > 0)
5145                 goto done;
5146
5147         /* Nothing else worked, so let's try
5148          * /dev/initctl */
5149         if (talk_initctl() > 0)
5150                 goto done;
5151
5152         log_error("Failed to talk to init daemon.");
5153         return -EIO;
5154
5155 done:
5156         warn_wall(arg_action);
5157         return 0;
5158 }
5159
5160 static int halt_main(DBusConnection *bus) {
5161         int r;
5162
5163         if (geteuid() != 0) {
5164                 log_error("Must be root.");
5165                 return -EPERM;
5166         }
5167
5168         if (arg_when > 0) {
5169                 char *m;
5170                 char date[FORMAT_TIMESTAMP_MAX];
5171
5172                 m = strv_join(arg_wall, " ");
5173                 r = send_shutdownd(arg_when,
5174                                    arg_action == ACTION_HALT     ? 'H' :
5175                                    arg_action == ACTION_POWEROFF ? 'P' :
5176                                                                    'r',
5177                                    arg_dry,
5178                                    !arg_no_wall,
5179                                    m);
5180                 free(m);
5181
5182                 if (r < 0)
5183                         log_warning("Failed to talk to shutdownd, proceeding with immediate shutdown: %s", strerror(-r));
5184                 else {
5185                         log_info("Shutdown scheduled for %s, use 'shutdown -c' to cancel.",
5186                                  format_timestamp(date, sizeof(date), arg_when));
5187                         return 0;
5188                 }
5189         }
5190
5191         if (!arg_dry && !arg_immediate)
5192                 return start_with_fallback(bus);
5193
5194         if (!arg_no_wtmp) {
5195                 if (sd_booted() > 0)
5196                         log_debug("Not writing utmp record, assuming that systemd-update-utmp is used.");
5197                 else if ((r = utmp_put_shutdown()) < 0)
5198                         log_warning("Failed to write utmp record: %s", strerror(-r));
5199         }
5200
5201         if (!arg_no_sync)
5202                 sync();
5203
5204         if (arg_dry)
5205                 return 0;
5206
5207         /* Make sure C-A-D is handled by the kernel from this
5208          * point on... */
5209         reboot(RB_ENABLE_CAD);
5210
5211         switch (arg_action) {
5212
5213         case ACTION_HALT:
5214                 log_info("Halting.");
5215                 reboot(RB_HALT_SYSTEM);
5216                 break;
5217
5218         case ACTION_POWEROFF:
5219                 log_info("Powering off.");
5220                 reboot(RB_POWER_OFF);
5221                 break;
5222
5223         case ACTION_REBOOT:
5224                 log_info("Rebooting.");
5225                 reboot(RB_AUTOBOOT);
5226                 break;
5227
5228         default:
5229                 assert_not_reached("Unknown halt action.");
5230         }
5231
5232         /* We should never reach this. */
5233         return -ENOSYS;
5234 }
5235
5236 static int runlevel_main(void) {
5237         int r, runlevel, previous;
5238
5239         r = utmp_get_runlevel(&runlevel, &previous);
5240         if (r < 0) {
5241                 puts("unknown");
5242                 return r;
5243         }
5244
5245         printf("%c %c\n",
5246                previous <= 0 ? 'N' : previous,
5247                runlevel <= 0 ? 'N' : runlevel);
5248
5249         return 0;
5250 }
5251
5252 int main(int argc, char*argv[]) {
5253         int r, retval = EXIT_FAILURE;
5254         DBusConnection *bus = NULL;
5255         DBusError error;
5256
5257         dbus_error_init(&error);
5258
5259         log_parse_environment();
5260         log_open();
5261
5262         if ((r = parse_argv(argc, argv)) < 0)
5263                 goto finish;
5264         else if (r == 0) {
5265                 retval = EXIT_SUCCESS;
5266                 goto finish;
5267         }
5268
5269         /* /sbin/runlevel doesn't need to communicate via D-Bus, so
5270          * let's shortcut this */
5271         if (arg_action == ACTION_RUNLEVEL) {
5272                 r = runlevel_main();
5273                 retval = r < 0 ? EXIT_FAILURE : r;
5274                 goto finish;
5275         }
5276
5277         if (running_in_chroot() > 0 && arg_action != ACTION_SYSTEMCTL) {
5278                 log_info("Running in chroot, ignoring request.");
5279                 retval = 0;
5280                 goto finish;
5281         }
5282
5283         if (!avoid_bus()) {
5284                 if (arg_transport == TRANSPORT_NORMAL)
5285                         bus_connect(arg_scope == UNIT_FILE_SYSTEM ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, &bus, &private_bus, &error);
5286                 else if (arg_transport == TRANSPORT_POLKIT) {
5287                         bus_connect_system_polkit(&bus, &error);
5288                         private_bus = false;
5289                 } else if (arg_transport == TRANSPORT_SSH) {
5290                         bus_connect_system_ssh(NULL, arg_host, &bus, &error);
5291                         private_bus = false;
5292                 } else
5293                         assert_not_reached("Uh, invalid transport...");
5294         }
5295
5296         switch (arg_action) {
5297
5298         case ACTION_SYSTEMCTL:
5299                 r = systemctl_main(bus, argc, argv, &error);
5300                 break;
5301
5302         case ACTION_HALT:
5303         case ACTION_POWEROFF:
5304         case ACTION_REBOOT:
5305         case ACTION_KEXEC:
5306                 r = halt_main(bus);
5307                 break;
5308
5309         case ACTION_RUNLEVEL2:
5310         case ACTION_RUNLEVEL3:
5311         case ACTION_RUNLEVEL4:
5312         case ACTION_RUNLEVEL5:
5313         case ACTION_RESCUE:
5314         case ACTION_EMERGENCY:
5315         case ACTION_DEFAULT:
5316                 r = start_with_fallback(bus);
5317                 break;
5318
5319         case ACTION_RELOAD:
5320         case ACTION_REEXEC:
5321                 r = reload_with_fallback(bus);
5322                 break;
5323
5324         case ACTION_CANCEL_SHUTDOWN:
5325                 r = send_shutdownd(0, 0, false, false, NULL);
5326                 break;
5327
5328         case ACTION_INVALID:
5329         case ACTION_RUNLEVEL:
5330         default:
5331                 assert_not_reached("Unknown action");
5332         }
5333
5334         retval = r < 0 ? EXIT_FAILURE : r;
5335
5336 finish:
5337         if (bus) {
5338                 dbus_connection_flush(bus);
5339                 dbus_connection_close(bus);
5340                 dbus_connection_unref(bus);
5341         }
5342
5343         dbus_error_free(&error);
5344
5345         dbus_shutdown();
5346
5347         strv_free(arg_property);
5348
5349         pager_close();
5350         agent_close();
5351
5352         return retval;
5353 }