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 "log.h"
  39 #include "util.h"
  40 #include "macro.h"
  41 #include "set.h"
  42 #include "utmp-wtmp.h"
  43 #include "special.h"
  44 #include "initreq.h"
  45 #include "strv.h"
  46 #include "dbus-common.h"
  47 #include "cgroup-show.h"
  48 #include "cgroup-util.h"
  49 #include "list.h"
  50 #include "path-lookup.h"
  51 #include "conf-parser.h"
  52 #include "sd-daemon.h"
  53 #include "shutdownd.h"
  54 #include "exit-status.h"
  55 #include "bus-errors.h"
  56 #include "build.h"
  57 #include "unit-name.h"
  58 #include "pager.h"
  59 #include "spawn-agent.h"
  60 #include "install.h"
  61
  62 static const char *arg_type = NULL;
  63 static char **arg_property = NULL;
  64 static bool arg_all = false;
  65 static const char *arg_job_mode = "replace";
  66 static UnitFileScope arg_scope = UNIT_FILE_SYSTEM;
  67 static bool arg_immediate = false;
  68 static bool arg_no_block = false;
  69 static bool arg_no_pager = false;
  70 static bool arg_no_wtmp = false;
  71 static bool arg_no_sync = false;
  72 static bool arg_no_wall = false;
  73 static bool arg_no_reload = false;
  74 static bool arg_dry = false;
  75 static bool arg_quiet = false;
  76 static bool arg_full = false;
  77 static bool arg_force = false;
  78 static bool arg_ask_password = false;
  79 static bool arg_failed = false;
  80 static bool arg_runtime = false;
  81 static char **arg_wall = NULL;
  82 static const char *arg_kill_who = NULL;
  83 static const char *arg_kill_mode = NULL;
  84 static int arg_signal = SIGTERM;
  85 static const char *arg_root = NULL;
  86 static usec_t arg_when = 0;
  87 static enum action {
  88         ACTION_INVALID,
  89         ACTION_SYSTEMCTL,
  90         ACTION_HALT,
  91         ACTION_POWEROFF,
  92         ACTION_REBOOT,
  93         ACTION_KEXEC,
  94         ACTION_EXIT,
  95         ACTION_RUNLEVEL2,
  96         ACTION_RUNLEVEL3,
  97         ACTION_RUNLEVEL4,
  98         ACTION_RUNLEVEL5,
  99         ACTION_RESCUE,
 100         ACTION_EMERGENCY,
 101         ACTION_DEFAULT,
 102         ACTION_RELOAD,
 103         ACTION_REEXEC,
 104         ACTION_RUNLEVEL,
 105         ACTION_CANCEL_SHUTDOWN,
 106         _ACTION_MAX
 107 } arg_action = ACTION_SYSTEMCTL;
 108 static enum dot {
 109         DOT_ALL,
 110         DOT_ORDER,
 111         DOT_REQUIRE
 112 } arg_dot = DOT_ALL;
 113 static enum transport {
 114         TRANSPORT_NORMAL,
 115         TRANSPORT_SSH,
 116         TRANSPORT_POLKIT
 117 } arg_transport = TRANSPORT_NORMAL;
 118 static const char *arg_host = NULL;
 119
 120 static bool private_bus = false;
 121
 122 static int daemon_reload(DBusConnection *bus, char **args);
 123
 124 static bool on_tty(void) {
 125         static int t = -1;
 126
 127         /* Note that this is invoked relatively early, before we start
 128          * the pager. That means the value we return reflects whether
 129          * we originally were started on a tty, not if we currently
 130          * are. But this is intended, since we want colour and so on
 131          * when run in our own pager. */
 132
 133         if (_unlikely_(t < 0))
 134                 t = isatty(STDOUT_FILENO) > 0;
 135
 136         return t;
 137 }
 138
 139 static void pager_open_if_enabled(void) {
 140         on_tty();
 141
 142         if (arg_no_pager)
 143                 return;
 144
 145         pager_open();
 146 }
 147
 148 static void agent_open_if_enabled(void) {
 149
 150         /* Open the password agent as a child process if necessary */
 151
 152         if (!arg_ask_password)
 153                 return;
 154
 155         if (arg_scope != UNIT_FILE_SYSTEM)
 156                 return;
 157
 158         agent_open();
 159 }
 160
 161 static const char *ansi_highlight(bool b) {
 162
 163         if (!on_tty())
 164                 return "";
 165
 166         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
 167 }
 168
 169 static const char *ansi_highlight_green(bool b) {
 170
 171         if (!on_tty())
 172                 return "";
 173
 174         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
 175 }
 176
 177 static bool error_is_no_service(const DBusError *error) {
 178         assert(error);
 179
 180         if (!dbus_error_is_set(error))
 181                 return false;
 182
 183         if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
 184                 return true;
 185
 186         if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
 187                 return true;
 188
 189         return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
 190 }
 191
 192 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
 193         assert(error);
 194
 195         if (!dbus_error_is_set(error))
 196                 return r;
 197
 198         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
 199             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
 200             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
 201             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
 202                 return EXIT_NOPERMISSION;
 203
 204         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
 205                 return EXIT_NOTINSTALLED;
 206
 207         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
 208             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
 209                 return EXIT_NOTIMPLEMENTED;
 210
 211         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
 212                 return EXIT_NOTCONFIGURED;
 213
 214         if (r != 0)
 215                 return r;
 216
 217         return EXIT_FAILURE;
 218 }
 219
 220 static void warn_wall(enum action action) {
 221         static const char *table[_ACTION_MAX] = {
 222                 [ACTION_HALT]      = "The system is going down for system halt NOW!",
 223                 [ACTION_REBOOT]    = "The system is going down for reboot NOW!",
 224                 [ACTION_POWEROFF]  = "The system is going down for power-off NOW!",
 225                 [ACTION_KEXEC]     = "The system is going down for kexec reboot NOW!",
 226                 [ACTION_RESCUE]    = "The system is going down to rescue mode NOW!",
 227                 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
 228         };
 229
 230         if (arg_no_wall)
 231                 return;
 232
 233         if (arg_wall) {
 234                 char *p;
 235
 236                 if (!(p = strv_join(arg_wall, " "))) {
 237                         log_error("Failed to join strings.");
 238                         return;
 239                 }
 240
 241                 if (*p) {
 242                         utmp_wall(p, NULL);
 243                         free(p);
 244                         return;
 245                 }
 246
 247                 free(p);
 248         }
 249
 250         if (!table[action])
 251                 return;
 252
 253         utmp_wall(table[action], NULL);
 254 }
 255
 256 static bool avoid_bus(void) {
 257
 258         if (running_in_chroot() > 0)
 259                 return true;
 260
 261         if (sd_booted() <= 0)
 262                 return true;
 263
 264         if (!isempty(arg_root))
 265                 return true;
 266
 267         if (arg_scope == UNIT_FILE_GLOBAL)
 268                 return true;
 269
 270         return false;
 271 }
 272
 273 struct unit_info {
 274         const char *id;
 275         const char *description;
 276         const char *load_state;
 277         const char *active_state;
 278         const char *sub_state;
 279         const char *following;
 280         const char *unit_path;
 281         uint32_t job_id;
 282         const char *job_type;
 283         const char *job_path;
 284 };
 285
 286 static int compare_unit_info(const void *a, const void *b) {
 287         const char *d1, *d2;
 288         const struct unit_info *u = a, *v = b;
 289
 290         d1 = strrchr(u->id, '.');
 291         d2 = strrchr(v->id, '.');
 292
 293         if (d1 && d2) {
 294                 int r;
 295
 296                 if ((r = strcasecmp(d1, d2)) != 0)
 297                         return r;
 298         }
 299
 300         return strcasecmp(u->id, v->id);
 301 }
 302
 303 static bool output_show_unit(const struct unit_info *u) {
 304         const char *dot;
 305
 306         if (arg_failed)
 307                 return streq(u->active_state, "failed");
 308
 309         return (!arg_type || ((dot = strrchr(u->id, '.')) &&
 310                               streq(dot+1, arg_type))) &&
 311                 (arg_all || !(streq(u->active_state, "inactive") || u->following[0]) || u->job_id > 0);
 312 }
 313
 314 static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
 315         unsigned active_len, sub_len, job_len, n_shown = 0;
 316         const struct unit_info *u;
 317
 318         active_len = sizeof("ACTIVE")-1;
 319         sub_len = sizeof("SUB")-1;
 320         job_len = sizeof("JOB")-1;
 321
 322         for (u = unit_infos; u < unit_infos + c; u++) {
 323                 if (!output_show_unit(u))
 324                         continue;
 325
 326                 active_len = MAX(active_len, strlen(u->active_state));
 327                 sub_len = MAX(sub_len, strlen(u->sub_state));
 328                 if (u->job_id != 0)
 329                         job_len = MAX(job_len, strlen(u->job_type));
 330         }
 331
 332         if (on_tty()) {
 333                 printf("%-25s %-6s %-*s %-*s %-*s", "UNIT", "LOAD",
 334                        active_len, "ACTIVE", sub_len, "SUB", job_len, "JOB");
 335                 if (columns() >= 80+12 || arg_full || !arg_no_pager)
 336                         printf(" %s\n", "DESCRIPTION");
 337                 else
 338                         printf("\n");
 339         }
 340
 341         for (u = unit_infos; u < unit_infos + c; u++) {
 342                 char *e;
 343                 int a = 0, b = 0;
 344                 const char *on_loaded, *off_loaded;
 345                 const char *on_active, *off_active;
 346
 347                 if (!output_show_unit(u))
 348                         continue;
 349
 350                 n_shown++;
 351
 352                 if (!streq(u->load_state, "loaded") &&
 353                     !streq(u->load_state, "banned")) {
 354                         on_loaded = ansi_highlight(true);
 355                         off_loaded = ansi_highlight(false);
 356                 } else
 357                         on_loaded = off_loaded = "";
 358
 359                 if (streq(u->active_state, "failed")) {
 360                         on_active = ansi_highlight(true);
 361                         off_active = ansi_highlight(false);
 362                 } else
 363                         on_active = off_active = "";
 364
 365                 e = arg_full ? NULL : ellipsize(u->id, 25, 33);
 366
 367                 printf("%-25s %s%-6s%s %s%-*s %-*s%s%n",
 368                        e ? e : u->id,
 369                        on_loaded, u->load_state, off_loaded,
 370                        on_active, active_len, u->active_state,
 371                        sub_len, u->sub_state, off_active,
 372                        &a);
 373
 374                 free(e);
 375
 376                 a -= strlen(on_loaded) + strlen(off_loaded);
 377                 a -= strlen(on_active) + strlen(off_active);
 378
 379                 if (u->job_id != 0)
 380                         printf(" %-*s", job_len, u->job_type);
 381                 else
 382                         b = 1 + job_len;
 383
 384                 if (a + b + 1 < columns()) {
 385                         if (u->job_id == 0)
 386                                 printf(" %-*s", job_len, "");
 387
 388                         if (arg_full || !arg_no_pager)
 389                                 printf(" %s", u->description);
 390                         else
 391                                 printf(" %.*s", columns() - a - b - 1, u->description);
 392                 }
 393
 394                 fputs("\n", stdout);
 395         }
 396
 397         if (on_tty()) {
 398                 printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
 399                        "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
 400                        "SUB    = The low-level unit activation state, values depend on unit type.\n"
 401                        "JOB    = Pending job for the unit.\n");
 402
 403                 if (arg_all)
 404                         printf("\n%u units listed.\n", n_shown);
 405                 else
 406                         printf("\n%u units listed. Pass --all to see inactive units, too.\n", n_shown);
 407         }
 408 }
 409
 410 static int list_units(DBusConnection *bus, char **args) {
 411         DBusMessage *m = NULL, *reply = NULL;
 412         DBusError error;
 413         int r;
 414         DBusMessageIter iter, sub, sub2;
 415         unsigned c = 0, n_units = 0;
 416         struct unit_info *unit_infos = NULL;
 417
 418         dbus_error_init(&error);
 419
 420         assert(bus);
 421
 422         pager_open_if_enabled();
 423
 424         if (!(m = dbus_message_new_method_call(
 425                               "org.freedesktop.systemd1",
 426                               "/org/freedesktop/systemd1",
 427                               "org.freedesktop.systemd1.Manager",
 428                               "ListUnits"))) {
 429                 log_error("Could not allocate message.");
 430                 return -ENOMEM;
 431         }
 432
 433         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 434                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 435                 r = -EIO;
 436                 goto finish;
 437         }
 438
 439         if (!dbus_message_iter_init(reply, &iter) ||
 440             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 441             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 442                 log_error("Failed to parse reply.");
 443                 r = -EIO;
 444                 goto finish;
 445         }
 446
 447         dbus_message_iter_recurse(&iter, &sub);
 448
 449         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 450                 struct unit_info *u;
 451
 452                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 453                         log_error("Failed to parse reply.");
 454                         r = -EIO;
 455                         goto finish;
 456                 }
 457
 458                 if (c >= n_units) {
 459                         struct unit_info *w;
 460
 461                         n_units = MAX(2*c, 16);
 462                         w = realloc(unit_infos, sizeof(struct unit_info) * n_units);
 463
 464                         if (!w) {
 465                                 log_error("Failed to allocate unit array.");
 466                                 r = -ENOMEM;
 467                                 goto finish;
 468                         }
 469
 470                         unit_infos = w;
 471                 }
 472
 473                 u = unit_infos+c;
 474
 475                 dbus_message_iter_recurse(&sub, &sub2);
 476
 477                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->id, true) < 0 ||
 478                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->description, true) < 0 ||
 479                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->load_state, true) < 0 ||
 480                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->active_state, true) < 0 ||
 481                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->sub_state, true) < 0 ||
 482                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->following, true) < 0 ||
 483                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->unit_path, true) < 0 ||
 484                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &u->job_id, true) < 0 ||
 485                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->job_type, true) < 0 ||
 486                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->job_path, false) < 0) {
 487                         log_error("Failed to parse reply.");
 488                         r = -EIO;
 489                         goto finish;
 490                 }
 491
 492                 dbus_message_iter_next(&sub);
 493                 c++;
 494         }
 495
 496         if (c > 0) {
 497                 qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
 498                 output_units_list(unit_infos, c);
 499         }
 500
 501         r = 0;
 502
 503 finish:
 504         if (m)
 505                 dbus_message_unref(m);
 506
 507         if (reply)
 508                 dbus_message_unref(reply);
 509
 510         free(unit_infos);
 511
 512         dbus_error_free(&error);
 513
 514         return r;
 515 }
 516
 517 static int compare_unit_file_list(const void *a, const void *b) {
 518         const char *d1, *d2;
 519         const UnitFileList *u = a, *v = b;
 520
 521         d1 = strrchr(u->path, '.');
 522         d2 = strrchr(v->path, '.');
 523
 524         if (d1 && d2) {
 525                 int r;
 526
 527                 r = strcasecmp(d1, d2);
 528                 if (r != 0)
 529                         return r;
 530         }
 531
 532         return strcasecmp(file_name_from_path(u->path), file_name_from_path(v->path));
 533 }
 534
 535 static bool output_show_unit_file(const UnitFileList *u) {
 536         const char *dot;
 537
 538         return !arg_type || ((dot = strrchr(u->path, '.')) && streq(dot+1, arg_type));
 539 }
 540
 541 static void output_unit_file_list(const UnitFileList *units, unsigned c) {
 542         unsigned n_shown = 0;
 543         const UnitFileList *u;
 544
 545         if (on_tty())
 546                 printf("%-25s %-6s\n", "UNIT FILE", "STATE");
 547
 548         for (u = units; u < units + c; u++) {
 549                 char *e;
 550                 const char *on, *off;
 551                 const char *id;
 552
 553                 if (!output_show_unit_file(u))
 554                         continue;
 555
 556                 n_shown++;
 557
 558                 if (u->state == UNIT_FILE_MASKED ||
 559                     u->state == UNIT_FILE_MASKED_RUNTIME ||
 560                     u->state == UNIT_FILE_DISABLED) {
 561                         on  = ansi_highlight(true);
 562                         off = ansi_highlight(false);
 563                 } else if (u->state == UNIT_FILE_ENABLED) {
 564                         on  = ansi_highlight_green(true);
 565                         off = ansi_highlight_green(false);
 566                 } else
 567                         on = off = "";
 568
 569                 id = file_name_from_path(u->path);
 570
 571                 e = arg_full ? NULL : ellipsize(id, 25, 33);
 572
 573                 printf("%-25s %s%-6s%s\n",
 574                        e ? e : id,
 575                        on, unit_file_state_to_string(u->state), off);
 576
 577                 free(e);
 578         }
 579
 580         if (on_tty())
 581                 printf("\n%u unit files listed.\n", n_shown);
 582 }
 583
 584 static int list_unit_files(DBusConnection *bus, char **args) {
 585         DBusMessage *m = NULL, *reply = NULL;
 586         DBusError error;
 587         int r;
 588         DBusMessageIter iter, sub, sub2;
 589         unsigned c = 0, n_units = 0;
 590         UnitFileList *units = NULL;
 591
 592         dbus_error_init(&error);
 593
 594         assert(bus);
 595
 596         pager_open_if_enabled();
 597
 598         if (avoid_bus()) {
 599                 Hashmap *h;
 600                 UnitFileList *u;
 601                 Iterator i;
 602
 603                 h = hashmap_new(string_hash_func, string_compare_func);
 604                 if (!h) {
 605                         log_error("Out of memory");
 606                         return -ENOMEM;
 607                 }
 608
 609                 r = unit_file_get_list(arg_scope, arg_root, h);
 610                 if (r < 0) {
 611                         log_error("Failed to get unit file list: %s", strerror(-r));
 612                         return r;
 613                 }
 614
 615                 n_units = hashmap_size(h);
 616                 units = new(UnitFileList, n_units);
 617                 if (!units) {
 618                         unit_file_list_free(h);
 619                         log_error("Out of memory");
 620                         return -ENOMEM;
 621                 }
 622
 623                 HASHMAP_FOREACH(u, h, i) {
 624                         memcpy(units + c++, u, sizeof(UnitFileList));
 625                         free(u);
 626                 }
 627
 628                 hashmap_free(h);
 629         } else {
 630                 m = dbus_message_new_method_call(
 631                                 "org.freedesktop.systemd1",
 632                                 "/org/freedesktop/systemd1",
 633                                 "org.freedesktop.systemd1.Manager",
 634                                 "ListUnitFiles");
 635                 if (!m) {
 636                         log_error("Could not allocate message.");
 637                         return -ENOMEM;
 638                 }
 639
 640                 reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
 641                 if (!reply) {
 642                         log_error("Failed to issue method call: %s", bus_error_message(&error));
 643                         r = -EIO;
 644                         goto finish;
 645                 }
 646
 647                 if (!dbus_message_iter_init(reply, &iter) ||
 648                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 649                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 650                         log_error("Failed to parse reply.");
 651                         r = -EIO;
 652                         goto finish;
 653                 }
 654
 655                 dbus_message_iter_recurse(&iter, &sub);
 656
 657                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 658                         UnitFileList *u;
 659                         const char *state;
 660
 661                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 662                                 log_error("Failed to parse reply.");
 663                                 r = -EIO;
 664                                 goto finish;
 665                         }
 666
 667                         if (c >= n_units) {
 668                                 UnitFileList *w;
 669
 670                                 n_units = MAX(2*c, 16);
 671                                 w = realloc(units, sizeof(struct UnitFileList) * n_units);
 672
 673                                 if (!w) {
 674                                         log_error("Failed to allocate unit array.");
 675                                         r = -ENOMEM;
 676                                         goto finish;
 677                                 }
 678
 679                                 units = w;
 680                         }
 681
 682                         u = units+c;
 683
 684                         dbus_message_iter_recurse(&sub, &sub2);
 685
 686                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->path, true) < 0 ||
 687                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, false) < 0) {
 688                                 log_error("Failed to parse reply.");
 689                                 r = -EIO;
 690                                 goto finish;
 691                         }
 692
 693                         u->state = unit_file_state_from_string(state);
 694
 695                         dbus_message_iter_next(&sub);
 696                         c++;
 697                 }
 698         }
 699
 700         if (c > 0) {
 701                 qsort(units, c, sizeof(UnitFileList), compare_unit_file_list);
 702                 output_unit_file_list(units, c);
 703         }
 704
 705         r = 0;
 706
 707 finish:
 708         if (m)
 709                 dbus_message_unref(m);
 710
 711         if (reply)
 712                 dbus_message_unref(reply);
 713
 714         free(units);
 715
 716         dbus_error_free(&error);
 717
 718         return r;
 719 }
 720
 721 static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) {
 722         static const char * const colors[] = {
 723                 "Requires",              "[color=\"black\"]",
 724                 "RequiresOverridable",   "[color=\"black\"]",
 725                 "Requisite",             "[color=\"darkblue\"]",
 726                 "RequisiteOverridable",  "[color=\"darkblue\"]",
 727                 "Wants",                 "[color=\"darkgrey\"]",
 728                 "Conflicts",             "[color=\"red\"]",
 729                 "ConflictedBy",          "[color=\"red\"]",
 730                 "After",                 "[color=\"green\"]"
 731         };
 732
 733         const char *c = NULL;
 734         unsigned i;
 735
 736         assert(name);
 737         assert(prop);
 738         assert(iter);
 739
 740         for (i = 0; i < ELEMENTSOF(colors); i += 2)
 741                 if (streq(colors[i], prop)) {
 742                         c = colors[i+1];
 743                         break;
 744                 }
 745
 746         if (!c)
 747                 return 0;
 748
 749         if (arg_dot != DOT_ALL)
 750                 if ((arg_dot == DOT_ORDER) != streq(prop, "After"))
 751                         return 0;
 752
 753         switch (dbus_message_iter_get_arg_type(iter)) {
 754
 755         case DBUS_TYPE_ARRAY:
 756
 757                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
 758                         DBusMessageIter sub;
 759
 760                         dbus_message_iter_recurse(iter, &sub);
 761
 762                         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 763                                 const char *s;
 764
 765                                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
 766                                 dbus_message_iter_get_basic(&sub, &s);
 767                                 printf("\t\"%s\"->\"%s\" %s;\n", name, s, c);
 768
 769                                 dbus_message_iter_next(&sub);
 770                         }
 771
 772                         return 0;
 773                 }
 774         }
 775
 776         return 0;
 777 }
 778
 779 static int dot_one(DBusConnection *bus, const char *name, const char *path) {
 780         DBusMessage *m = NULL, *reply = NULL;
 781         const char *interface = "org.freedesktop.systemd1.Unit";
 782         int r;
 783         DBusError error;
 784         DBusMessageIter iter, sub, sub2, sub3;
 785
 786         assert(bus);
 787         assert(path);
 788
 789         dbus_error_init(&error);
 790
 791         if (!(m = dbus_message_new_method_call(
 792                               "org.freedesktop.systemd1",
 793                               path,
 794                               "org.freedesktop.DBus.Properties",
 795                               "GetAll"))) {
 796                 log_error("Could not allocate message.");
 797                 r = -ENOMEM;
 798                 goto finish;
 799         }
 800
 801         if (!dbus_message_append_args(m,
 802                                       DBUS_TYPE_STRING, &interface,
 803                                       DBUS_TYPE_INVALID)) {
 804                 log_error("Could not append arguments to message.");
 805                 r = -ENOMEM;
 806                 goto finish;
 807         }
 808
 809         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 810                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 811                 r = -EIO;
 812                 goto finish;
 813         }
 814
 815         if (!dbus_message_iter_init(reply, &iter) ||
 816             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 817             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
 818                 log_error("Failed to parse reply.");
 819                 r = -EIO;
 820                 goto finish;
 821         }
 822
 823         dbus_message_iter_recurse(&iter, &sub);
 824
 825         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 826                 const char *prop;
 827
 828                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
 829                         log_error("Failed to parse reply.");
 830                         r = -EIO;
 831                         goto finish;
 832                 }
 833
 834                 dbus_message_iter_recurse(&sub, &sub2);
 835
 836                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
 837                         log_error("Failed to parse reply.");
 838                         r = -EIO;
 839                         goto finish;
 840                 }
 841
 842                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
 843                         log_error("Failed to parse reply.");
 844                         r = -EIO;
 845                         goto finish;
 846                 }
 847
 848                 dbus_message_iter_recurse(&sub2, &sub3);
 849
 850                 if (dot_one_property(name, prop, &sub3)) {
 851                         log_error("Failed to parse reply.");
 852                         r = -EIO;
 853                         goto finish;
 854                 }
 855
 856                 dbus_message_iter_next(&sub);
 857         }
 858
 859         r = 0;
 860
 861 finish:
 862         if (m)
 863                 dbus_message_unref(m);
 864
 865         if (reply)
 866                 dbus_message_unref(reply);
 867
 868         dbus_error_free(&error);
 869
 870         return r;
 871 }
 872
 873 static int dot(DBusConnection *bus, char **args) {
 874         DBusMessage *m = NULL, *reply = NULL;
 875         DBusError error;
 876         int r;
 877         DBusMessageIter iter, sub, sub2;
 878
 879         dbus_error_init(&error);
 880
 881         assert(bus);
 882
 883         if (!(m = dbus_message_new_method_call(
 884                               "org.freedesktop.systemd1",
 885                               "/org/freedesktop/systemd1",
 886                               "org.freedesktop.systemd1.Manager",
 887                               "ListUnits"))) {
 888                 log_error("Could not allocate message.");
 889                 return -ENOMEM;
 890         }
 891
 892         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 893                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 894                 r = -EIO;
 895                 goto finish;
 896         }
 897
 898         if (!dbus_message_iter_init(reply, &iter) ||
 899             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 900             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 901                 log_error("Failed to parse reply.");
 902                 r = -EIO;
 903                 goto finish;
 904         }
 905
 906         printf("digraph systemd {\n");
 907
 908         dbus_message_iter_recurse(&iter, &sub);
 909         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 910                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path;
 911
 912                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 913                         log_error("Failed to parse reply.");
 914                         r = -EIO;
 915                         goto finish;
 916                 }
 917
 918                 dbus_message_iter_recurse(&sub, &sub2);
 919
 920                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
 921                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
 922                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
 923                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
 924                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
 925                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
 926                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) {
 927                         log_error("Failed to parse reply.");
 928                         r = -EIO;
 929                         goto finish;
 930                 }
 931
 932                 if ((r = dot_one(bus, id, unit_path)) < 0)
 933                         goto finish;
 934
 935                 /* printf("\t\"%s\";\n", id); */
 936                 dbus_message_iter_next(&sub);
 937         }
 938
 939         printf("}\n");
 940
 941         log_info("   Color legend: black     = Requires\n"
 942                  "                 dark blue = Requisite\n"
 943                  "                 dark grey = Wants\n"
 944                  "                 red       = Conflicts\n"
 945                  "                 green     = After\n");
 946
 947         if (on_tty())
 948                 log_notice("-- You probably want to process this output with graphviz' dot tool.\n"
 949                            "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n");
 950
 951         r = 0;
 952
 953 finish:
 954         if (m)
 955                 dbus_message_unref(m);
 956
 957         if (reply)
 958                 dbus_message_unref(reply);
 959
 960         dbus_error_free(&error);
 961
 962         return r;
 963 }
 964
 965 static int list_jobs(DBusConnection *bus, char **args) {
 966         DBusMessage *m = NULL, *reply = NULL;
 967         DBusError error;
 968         int r;
 969         DBusMessageIter iter, sub, sub2;
 970         unsigned k = 0;
 971
 972         dbus_error_init(&error);
 973
 974         assert(bus);
 975
 976         pager_open_if_enabled();
 977
 978         if (!(m = dbus_message_new_method_call(
 979                               "org.freedesktop.systemd1",
 980                               "/org/freedesktop/systemd1",
 981                               "org.freedesktop.systemd1.Manager",
 982                               "ListJobs"))) {
 983                 log_error("Could not allocate message.");
 984                 return -ENOMEM;
 985         }
 986
 987         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 988                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 989                 r = -EIO;
 990                 goto finish;
 991         }
 992
 993         if (!dbus_message_iter_init(reply, &iter) ||
 994             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 995             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 996                 log_error("Failed to parse reply.");
 997                 r = -EIO;
 998                 goto finish;
 999         }
1000
1001         dbus_message_iter_recurse(&iter, &sub);
1002
1003         if (on_tty())
1004                 printf("%4s %-25s %-15s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
1005
1006         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1007                 const char *name, *type, *state, *job_path, *unit_path;
1008                 uint32_t id;
1009                 char *e;
1010
1011                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
1012                         log_error("Failed to parse reply.");
1013                         r = -EIO;
1014                         goto finish;
1015                 }
1016
1017                 dbus_message_iter_recurse(&sub, &sub2);
1018
1019                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
1020                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
1021                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
1022                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
1023                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
1024                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
1025                         log_error("Failed to parse reply.");
1026                         r = -EIO;
1027                         goto finish;
1028                 }
1029
1030                 e = arg_full ? NULL : ellipsize(name, 25, 33);
1031                 printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state);
1032                 free(e);
1033
1034                 k++;
1035
1036                 dbus_message_iter_next(&sub);
1037         }
1038
1039         if (on_tty())
1040                 printf("\n%u jobs listed.\n", k);
1041
1042         r = 0;
1043
1044 finish:
1045         if (m)
1046                 dbus_message_unref(m);
1047
1048         if (reply)
1049                 dbus_message_unref(reply);
1050
1051         dbus_error_free(&error);
1052
1053         return r;
1054 }
1055
1056 static int load_unit(DBusConnection *bus, char **args) {
1057         DBusMessage *m = NULL, *reply = NULL;
1058         DBusError error;
1059         int r;
1060         char **name;
1061
1062         dbus_error_init(&error);
1063
1064         assert(bus);
1065         assert(args);
1066
1067         STRV_FOREACH(name, args+1) {
1068
1069                 if (!(m = dbus_message_new_method_call(
1070                                       "org.freedesktop.systemd1",
1071                                       "/org/freedesktop/systemd1",
1072                                       "org.freedesktop.systemd1.Manager",
1073                                       "LoadUnit"))) {
1074                         log_error("Could not allocate message.");
1075                         r = -ENOMEM;
1076                         goto finish;
1077                 }
1078
1079                 if (!dbus_message_append_args(m,
1080                                               DBUS_TYPE_STRING, name,
1081                                               DBUS_TYPE_INVALID)) {
1082                         log_error("Could not append arguments to message.");
1083                         r = -ENOMEM;
1084                         goto finish;
1085                 }
1086
1087                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1088                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1089                         r = -EIO;
1090                         goto finish;
1091                 }
1092
1093                 dbus_message_unref(m);
1094                 dbus_message_unref(reply);
1095
1096                 m = reply = NULL;
1097         }
1098
1099         r = 0;
1100
1101 finish:
1102         if (m)
1103                 dbus_message_unref(m);
1104
1105         if (reply)
1106                 dbus_message_unref(reply);
1107
1108         dbus_error_free(&error);
1109
1110         return r;
1111 }
1112
1113 static int cancel_job(DBusConnection *bus, char **args) {
1114         DBusMessage *m = NULL, *reply = NULL;
1115         DBusError error;
1116         int r;
1117         char **name;
1118
1119         dbus_error_init(&error);
1120
1121         assert(bus);
1122         assert(args);
1123
1124         if (strv_length(args) <= 1)
1125                 return daemon_reload(bus, args);
1126
1127         STRV_FOREACH(name, args+1) {
1128                 unsigned id;
1129                 const char *path;
1130
1131                 if (!(m = dbus_message_new_method_call(
1132                                       "org.freedesktop.systemd1",
1133                                       "/org/freedesktop/systemd1",
1134                                       "org.freedesktop.systemd1.Manager",
1135                                       "GetJob"))) {
1136                         log_error("Could not allocate message.");
1137                         r = -ENOMEM;
1138                         goto finish;
1139                 }
1140
1141                 if ((r = safe_atou(*name, &id)) < 0) {
1142                         log_error("Failed to parse job id: %s", strerror(-r));
1143                         goto finish;
1144                 }
1145
1146                 assert_cc(sizeof(uint32_t) == sizeof(id));
1147                 if (!dbus_message_append_args(m,
1148                                               DBUS_TYPE_UINT32, &id,
1149                                               DBUS_TYPE_INVALID)) {
1150                         log_error("Could not append arguments to message.");
1151                         r = -ENOMEM;
1152                         goto finish;
1153                 }
1154
1155                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1156                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1157                         r = -EIO;
1158                         goto finish;
1159                 }
1160
1161                 if (!dbus_message_get_args(reply, &error,
1162                                            DBUS_TYPE_OBJECT_PATH, &path,
1163                                            DBUS_TYPE_INVALID)) {
1164                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1165                         r = -EIO;
1166                         goto finish;
1167                 }
1168
1169                 dbus_message_unref(m);
1170                 if (!(m = dbus_message_new_method_call(
1171                                       "org.freedesktop.systemd1",
1172                                       path,
1173                                       "org.freedesktop.systemd1.Job",
1174                                       "Cancel"))) {
1175                         log_error("Could not allocate message.");
1176                         r = -ENOMEM;
1177                         goto finish;
1178                 }
1179
1180                 dbus_message_unref(reply);
1181                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1182                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1183                         r = -EIO;
1184                         goto finish;
1185                 }
1186
1187                 dbus_message_unref(m);
1188                 dbus_message_unref(reply);
1189                 m = reply = NULL;
1190         }
1191
1192         r = 0;
1193
1194 finish:
1195         if (m)
1196                 dbus_message_unref(m);
1197
1198         if (reply)
1199                 dbus_message_unref(reply);
1200
1201         dbus_error_free(&error);
1202
1203         return r;
1204 }
1205
1206 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
1207         DBusMessage *m = NULL, *reply = NULL;
1208         dbus_bool_t b = FALSE;
1209         DBusMessageIter iter, sub;
1210         const char
1211                 *interface = "org.freedesktop.systemd1.Unit",
1212                 *property = "NeedDaemonReload",
1213                 *path;
1214
1215         /* We ignore all errors here, since this is used to show a warning only */
1216
1217         if (!(m = dbus_message_new_method_call(
1218                               "org.freedesktop.systemd1",
1219                               "/org/freedesktop/systemd1",
1220                               "org.freedesktop.systemd1.Manager",
1221                               "GetUnit")))
1222                 goto finish;
1223
1224         if (!dbus_message_append_args(m,
1225                                       DBUS_TYPE_STRING, &unit,
1226                                       DBUS_TYPE_INVALID))
1227                 goto finish;
1228
1229         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1230                 goto finish;
1231
1232         if (!dbus_message_get_args(reply, NULL,
1233                                    DBUS_TYPE_OBJECT_PATH, &path,
1234                                    DBUS_TYPE_INVALID))
1235                 goto finish;
1236
1237         dbus_message_unref(m);
1238         if (!(m = dbus_message_new_method_call(
1239                               "org.freedesktop.systemd1",
1240                               path,
1241                               "org.freedesktop.DBus.Properties",
1242                               "Get")))
1243                 goto finish;
1244
1245         if (!dbus_message_append_args(m,
1246                                       DBUS_TYPE_STRING, &interface,
1247                                       DBUS_TYPE_STRING, &property,
1248                                       DBUS_TYPE_INVALID)) {
1249                 goto finish;
1250         }
1251
1252         dbus_message_unref(reply);
1253         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
1254                 goto finish;
1255
1256         if (!dbus_message_iter_init(reply, &iter) ||
1257             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
1258                 goto finish;
1259
1260         dbus_message_iter_recurse(&iter, &sub);
1261
1262         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
1263                 goto finish;
1264
1265         dbus_message_iter_get_basic(&sub, &b);
1266
1267 finish:
1268         if (m)
1269                 dbus_message_unref(m);
1270
1271         if (reply)
1272                 dbus_message_unref(reply);
1273
1274         return b;
1275 }
1276
1277 typedef struct WaitData {
1278         Set *set;
1279         char *result;
1280 } WaitData;
1281
1282 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
1283         DBusError error;
1284         WaitData *d = data;
1285
1286         assert(connection);
1287         assert(message);
1288         assert(d);
1289
1290         dbus_error_init(&error);
1291
1292         log_debug("Got D-Bus request: %s.%s() on %s",
1293                   dbus_message_get_interface(message),
1294                   dbus_message_get_member(message),
1295                   dbus_message_get_path(message));
1296
1297         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1298                 log_error("Warning! D-Bus connection terminated.");
1299                 dbus_connection_close(connection);
1300
1301         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1302                 uint32_t id;
1303                 const char *path, *result;
1304                 dbus_bool_t success = true;
1305
1306                 if (dbus_message_get_args(message, &error,
1307                                           DBUS_TYPE_UINT32, &id,
1308                                           DBUS_TYPE_OBJECT_PATH, &path,
1309                                           DBUS_TYPE_STRING, &result,
1310                                           DBUS_TYPE_INVALID)) {
1311                         char *p;
1312
1313                         if ((p = set_remove(d->set, (char*) path)))
1314                                 free(p);
1315
1316                         if (*result)
1317                                 d->result = strdup(result);
1318
1319                         goto finish;
1320                 }
1321 #ifndef LEGACY
1322                 dbus_error_free(&error);
1323
1324                 if (dbus_message_get_args(message, &error,
1325                                           DBUS_TYPE_UINT32, &id,
1326                                           DBUS_TYPE_OBJECT_PATH, &path,
1327                                           DBUS_TYPE_BOOLEAN, &success,
1328                                           DBUS_TYPE_INVALID)) {
1329                         char *p;
1330
1331                         /* Compatibility with older systemd versions <
1332                          * 19 during upgrades. This should be dropped
1333                          * one day */
1334
1335                         if ((p = set_remove(d->set, (char*) path)))
1336                                 free(p);
1337
1338                         if (!success)
1339                                 d->result = strdup("failed");
1340
1341                         goto finish;
1342                 }
1343 #endif
1344
1345                 log_error("Failed to parse message: %s", bus_error_message(&error));
1346         }
1347
1348 finish:
1349         dbus_error_free(&error);
1350         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1351 }
1352
1353 static int enable_wait_for_jobs(DBusConnection *bus) {
1354         DBusError error;
1355
1356         assert(bus);
1357
1358         if (private_bus)
1359                 return 0;
1360
1361         dbus_error_init(&error);
1362         dbus_bus_add_match(bus,
1363                            "type='signal',"
1364                            "sender='org.freedesktop.systemd1',"
1365                            "interface='org.freedesktop.systemd1.Manager',"
1366                            "member='JobRemoved',"
1367                            "path='/org/freedesktop/systemd1'",
1368                            &error);
1369
1370         if (dbus_error_is_set(&error)) {
1371                 log_error("Failed to add match: %s", bus_error_message(&error));
1372                 dbus_error_free(&error);
1373                 return -EIO;
1374         }
1375
1376         /* This is slightly dirty, since we don't undo the match registrations. */
1377         return 0;
1378 }
1379
1380 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1381         int r;
1382         WaitData d;
1383
1384         assert(bus);
1385         assert(s);
1386
1387         zero(d);
1388         d.set = s;
1389
1390         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
1391                 log_error("Failed to add filter.");
1392                 r = -ENOMEM;
1393                 goto finish;
1394         }
1395
1396         while (!set_isempty(s) &&
1397                dbus_connection_read_write_dispatch(bus, -1))
1398                 ;
1399
1400         if (!arg_quiet && d.result) {
1401                 if (streq(d.result, "timeout"))
1402                         log_error("Job timed out.");
1403                 else if (streq(d.result, "canceled"))
1404                         log_error("Job canceled.");
1405                 else if (streq(d.result, "dependency"))
1406                         log_error("A dependency job failed. See system logs for details.");
1407                 else if (!streq(d.result, "done") && !streq(d.result, "skipped"))
1408                         log_error("Job failed. See system logs and 'systemctl status' for details.");
1409         }
1410
1411         if (streq_ptr(d.result, "timeout"))
1412                 r = -ETIME;
1413         else if (streq_ptr(d.result, "canceled"))
1414                 r = -ECANCELED;
1415         else if (!streq_ptr(d.result, "done") && !streq_ptr(d.result, "skipped"))
1416                 r = -EIO;
1417         else
1418                 r = 0;
1419
1420         free(d.result);
1421
1422 finish:
1423         /* This is slightly dirty, since we don't undo the filter registration. */
1424
1425         return r;
1426 }
1427
1428 static int start_unit_one(
1429                 DBusConnection *bus,
1430                 const char *method,
1431                 const char *name,
1432                 const char *mode,
1433                 DBusError *error,
1434                 Set *s) {
1435
1436         DBusMessage *m = NULL, *reply = NULL;
1437         const char *path;
1438         int r;
1439
1440         assert(bus);
1441         assert(method);
1442         assert(name);
1443         assert(mode);
1444         assert(error);
1445         assert(arg_no_block || s);
1446
1447         if (!(m = dbus_message_new_method_call(
1448                               "org.freedesktop.systemd1",
1449                               "/org/freedesktop/systemd1",
1450                               "org.freedesktop.systemd1.Manager",
1451                               method))) {
1452                 log_error("Could not allocate message.");
1453                 r = -ENOMEM;
1454                 goto finish;
1455         }
1456
1457         if (!dbus_message_append_args(m,
1458                                       DBUS_TYPE_STRING, &name,
1459                                       DBUS_TYPE_STRING, &mode,
1460                                       DBUS_TYPE_INVALID)) {
1461                 log_error("Could not append arguments to message.");
1462                 r = -ENOMEM;
1463                 goto finish;
1464         }
1465
1466         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error))) {
1467
1468                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(error)) {
1469                         /* There's always a fallback possible for
1470                          * legacy actions. */
1471                         r = -EADDRNOTAVAIL;
1472                         goto finish;
1473                 }
1474
1475                 log_error("Failed to issue method call: %s", bus_error_message(error));
1476                 r = -EIO;
1477                 goto finish;
1478         }
1479
1480         if (!dbus_message_get_args(reply, error,
1481                                    DBUS_TYPE_OBJECT_PATH, &path,
1482                                    DBUS_TYPE_INVALID)) {
1483                 log_error("Failed to parse reply: %s", bus_error_message(error));
1484                 r = -EIO;
1485                 goto finish;
1486         }
1487
1488         if (need_daemon_reload(bus, name))
1489                 log_warning("Warning: Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
1490                             arg_scope == UNIT_FILE_SYSTEM ? "--system" : "--user");
1491
1492         if (!arg_no_block) {
1493                 char *p;
1494
1495                 if (!(p = strdup(path))) {
1496                         log_error("Failed to duplicate path.");
1497                         r = -ENOMEM;
1498                         goto finish;
1499                 }
1500
1501                 if ((r = set_put(s, p)) < 0) {
1502                         free(p);
1503                         log_error("Failed to add path to set.");
1504                         goto finish;
1505                 }
1506         }
1507
1508         r = 0;
1509
1510 finish:
1511         if (m)
1512                 dbus_message_unref(m);
1513
1514         if (reply)
1515                 dbus_message_unref(reply);
1516
1517         return r;
1518 }
1519
1520 static enum action verb_to_action(const char *verb) {
1521         if (streq(verb, "halt"))
1522                 return ACTION_HALT;
1523         else if (streq(verb, "poweroff"))
1524                 return ACTION_POWEROFF;
1525         else if (streq(verb, "reboot"))
1526                 return ACTION_REBOOT;
1527         else if (streq(verb, "kexec"))
1528                 return ACTION_KEXEC;
1529         else if (streq(verb, "rescue"))
1530                 return ACTION_RESCUE;
1531         else if (streq(verb, "emergency"))
1532                 return ACTION_EMERGENCY;
1533         else if (streq(verb, "default"))
1534                 return ACTION_DEFAULT;
1535         else if (streq(verb, "exit"))
1536                 return ACTION_EXIT;
1537         else
1538                 return ACTION_INVALID;
1539 }
1540
1541 static int start_unit(DBusConnection *bus, char **args) {
1542
1543         static const char * const table[_ACTION_MAX] = {
1544                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1545                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1546                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1547                 [ACTION_KEXEC] = SPECIAL_KEXEC_TARGET,
1548                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1549                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1550                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1551                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1552                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1553                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1554                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET,
1555                 [ACTION_EXIT] = SPECIAL_EXIT_TARGET
1556         };
1557
1558         int r, ret = 0;
1559         const char *method, *mode, *one_name;
1560         Set *s = NULL;
1561         DBusError error;
1562         char **name;
1563
1564         dbus_error_init(&error);
1565
1566         assert(bus);
1567
1568         agent_open_if_enabled();
1569
1570         if (arg_action == ACTION_SYSTEMCTL) {
1571                 method =
1572                         streq(args[0], "stop") ||
1573                         streq(args[0], "condstop")              ? "StopUnit" :
1574                         streq(args[0], "reload")                ? "ReloadUnit" :
1575                         streq(args[0], "restart")               ? "RestartUnit" :
1576
1577                         streq(args[0], "try-restart")           ||
1578                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1579
1580                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1581
1582                         streq(args[0], "reload-or-try-restart") ||
1583                         streq(args[0], "condreload") ||
1584
1585                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1586                                                                   "StartUnit";
1587
1588                 mode =
1589                         (streq(args[0], "isolate") ||
1590                          streq(args[0], "rescue")  ||
1591                          streq(args[0], "emergency")) ? "isolate" : arg_job_mode;
1592
1593                 one_name = table[verb_to_action(args[0])];
1594
1595         } else {
1596                 assert(arg_action < ELEMENTSOF(table));
1597                 assert(table[arg_action]);
1598
1599                 method = "StartUnit";
1600
1601                 mode = (arg_action == ACTION_EMERGENCY ||
1602                         arg_action == ACTION_RESCUE ||
1603                         arg_action == ACTION_RUNLEVEL2 ||
1604                         arg_action == ACTION_RUNLEVEL3 ||
1605                         arg_action == ACTION_RUNLEVEL4 ||
1606                         arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace";
1607
1608                 one_name = table[arg_action];
1609         }
1610
1611         if (!arg_no_block) {
1612                 if ((ret = enable_wait_for_jobs(bus)) < 0) {
1613                         log_error("Could not watch jobs: %s", strerror(-ret));
1614                         goto finish;
1615                 }
1616
1617                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1618                         log_error("Failed to allocate set.");
1619                         ret = -ENOMEM;
1620                         goto finish;
1621                 }
1622         }
1623
1624         if (one_name) {
1625                 if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0)
1626                         goto finish;
1627         } else {
1628                 STRV_FOREACH(name, args+1)
1629                         if ((r = start_unit_one(bus, method, *name, mode, &error, s)) != 0) {
1630                                 ret = translate_bus_error_to_exit_status(r, &error);
1631                                 dbus_error_free(&error);
1632                         }
1633         }
1634
1635         if (!arg_no_block)
1636                 if ((r = wait_for_jobs(bus, s)) < 0) {
1637                         ret = r;
1638                         goto finish;
1639                 }
1640
1641 finish:
1642         if (s)
1643                 set_free_free(s);
1644
1645         dbus_error_free(&error);
1646
1647         return ret;
1648 }
1649
1650 static int start_special(DBusConnection *bus, char **args) {
1651         int r;
1652
1653         assert(bus);
1654         assert(args);
1655
1656         if (arg_force &&
1657             (streq(args[0], "halt") ||
1658              streq(args[0], "poweroff") ||
1659              streq(args[0], "reboot") ||
1660              streq(args[0], "kexec") ||
1661              streq(args[0], "exit")))
1662                 return daemon_reload(bus, args);
1663
1664         r = start_unit(bus, args);
1665
1666         if (r >= 0)
1667                 warn_wall(verb_to_action(args[0]));
1668
1669         return r;
1670 }
1671
1672 static int check_unit(DBusConnection *bus, char **args) {
1673         DBusMessage *m = NULL, *reply = NULL;
1674         const char
1675                 *interface = "org.freedesktop.systemd1.Unit",
1676                 *property = "ActiveState";
1677         int r = 3; /* According to LSB: "program is not running" */
1678         DBusError error;
1679         char **name;
1680
1681         assert(bus);
1682         assert(args);
1683
1684         dbus_error_init(&error);
1685
1686         STRV_FOREACH(name, args+1) {
1687                 const char *path = NULL;
1688                 const char *state;
1689                 DBusMessageIter iter, sub;
1690
1691                 if (!(m = dbus_message_new_method_call(
1692                                       "org.freedesktop.systemd1",
1693                                       "/org/freedesktop/systemd1",
1694                                       "org.freedesktop.systemd1.Manager",
1695                                       "GetUnit"))) {
1696                         log_error("Could not allocate message.");
1697                         r = -ENOMEM;
1698                         goto finish;
1699                 }
1700
1701                 if (!dbus_message_append_args(m,
1702                                               DBUS_TYPE_STRING, name,
1703                                               DBUS_TYPE_INVALID)) {
1704                         log_error("Could not append arguments to message.");
1705                         r = -ENOMEM;
1706                         goto finish;
1707                 }
1708
1709                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1710
1711                         /* Hmm, cannot figure out anything about this unit... */
1712                         if (!arg_quiet)
1713                                 puts("unknown");
1714
1715                         dbus_error_free(&error);
1716                         dbus_message_unref(m);
1717                         m = NULL;
1718                         continue;
1719                 }
1720
1721                 if (!dbus_message_get_args(reply, &error,
1722                                            DBUS_TYPE_OBJECT_PATH, &path,
1723                                            DBUS_TYPE_INVALID)) {
1724                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1725                         r = -EIO;
1726                         goto finish;
1727                 }
1728
1729                 dbus_message_unref(m);
1730                 if (!(m = dbus_message_new_method_call(
1731                                       "org.freedesktop.systemd1",
1732                                       path,
1733                                       "org.freedesktop.DBus.Properties",
1734                                       "Get"))) {
1735                         log_error("Could not allocate message.");
1736                         r = -ENOMEM;
1737                         goto finish;
1738                 }
1739
1740                 if (!dbus_message_append_args(m,
1741                                               DBUS_TYPE_STRING, &interface,
1742                                               DBUS_TYPE_STRING, &property,
1743                                               DBUS_TYPE_INVALID)) {
1744                         log_error("Could not append arguments to message.");
1745                         r = -ENOMEM;
1746                         goto finish;
1747                 }
1748
1749                 dbus_message_unref(reply);
1750                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1751                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1752                         r = -EIO;
1753                         goto finish;
1754                 }
1755
1756                 if (!dbus_message_iter_init(reply, &iter) ||
1757                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1758                         log_error("Failed to parse reply.");
1759                         r = -EIO;
1760                         goto finish;
1761                 }
1762
1763                 dbus_message_iter_recurse(&iter, &sub);
1764
1765                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1766                         log_error("Failed to parse reply.");
1767                         r = -EIO;
1768                         goto finish;
1769                 }
1770
1771                 dbus_message_iter_get_basic(&sub, &state);
1772
1773                 if (!arg_quiet)
1774                         puts(state);
1775
1776                 if (streq(state, "active") || streq(state, "reloading"))
1777                         r = 0;
1778
1779                 dbus_message_unref(m);
1780                 dbus_message_unref(reply);
1781                 m = reply = NULL;
1782         }
1783
1784 finish:
1785         if (m)
1786                 dbus_message_unref(m);
1787
1788         if (reply)
1789                 dbus_message_unref(reply);
1790
1791         dbus_error_free(&error);
1792
1793         return r;
1794 }
1795
1796 static int kill_unit(DBusConnection *bus, char **args) {
1797         DBusMessage *m = NULL, *reply = NULL;
1798         int r = 0;
1799         DBusError error;
1800         char **name;
1801
1802         assert(bus);
1803         assert(args);
1804
1805         dbus_error_init(&error);
1806
1807         if (!arg_kill_who)
1808                 arg_kill_who = "all";
1809
1810         if (!arg_kill_mode)
1811                 arg_kill_mode = streq(arg_kill_who, "all") ? "control-group" : "process";
1812
1813         STRV_FOREACH(name, args+1) {
1814
1815                 if (!(m = dbus_message_new_method_call(
1816                                       "org.freedesktop.systemd1",
1817                                       "/org/freedesktop/systemd1",
1818                                       "org.freedesktop.systemd1.Manager",
1819                                       "KillUnit"))) {
1820                         log_error("Could not allocate message.");
1821                         r = -ENOMEM;
1822                         goto finish;
1823                 }
1824
1825                 if (!dbus_message_append_args(m,
1826                                               DBUS_TYPE_STRING, name,
1827                                               DBUS_TYPE_STRING, &arg_kill_who,
1828                                               DBUS_TYPE_STRING, &arg_kill_mode,
1829                                               DBUS_TYPE_INT32, &arg_signal,
1830                                               DBUS_TYPE_INVALID)) {
1831                         log_error("Could not append arguments to message.");
1832                         r = -ENOMEM;
1833                         goto finish;
1834                 }
1835
1836                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1837                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1838                         dbus_error_free(&error);
1839                         r = -EIO;
1840                 }
1841
1842                 dbus_message_unref(m);
1843
1844                 if (reply)
1845                         dbus_message_unref(reply);
1846                 m = reply = NULL;
1847         }
1848
1849 finish:
1850         if (m)
1851                 dbus_message_unref(m);
1852
1853         if (reply)
1854                 dbus_message_unref(reply);
1855
1856         dbus_error_free(&error);
1857
1858         return r;
1859 }
1860
1861 typedef struct ExecStatusInfo {
1862         char *name;
1863
1864         char *path;
1865         char **argv;
1866
1867         bool ignore;
1868
1869         usec_t start_timestamp;
1870         usec_t exit_timestamp;
1871         pid_t pid;
1872         int code;
1873         int status;
1874
1875         LIST_FIELDS(struct ExecStatusInfo, exec);
1876 } ExecStatusInfo;
1877
1878 static void exec_status_info_free(ExecStatusInfo *i) {
1879         assert(i);
1880
1881         free(i->name);
1882         free(i->path);
1883         strv_free(i->argv);
1884         free(i);
1885 }
1886
1887 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1888         uint64_t start_timestamp, exit_timestamp, start_timestamp_monotonic, exit_timestamp_monotonic;
1889         DBusMessageIter sub2, sub3;
1890         const char*path;
1891         unsigned n;
1892         uint32_t pid;
1893         int32_t code, status;
1894         dbus_bool_t ignore;
1895
1896         assert(i);
1897         assert(i);
1898
1899         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1900                 return -EIO;
1901
1902         dbus_message_iter_recurse(sub, &sub2);
1903
1904         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1905                 return -EIO;
1906
1907         if (!(i->path = strdup(path)))
1908                 return -ENOMEM;
1909
1910         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1911             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1912                 return -EIO;
1913
1914         n = 0;
1915         dbus_message_iter_recurse(&sub2, &sub3);
1916         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1917                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1918                 dbus_message_iter_next(&sub3);
1919                 n++;
1920         }
1921
1922
1923         if (!(i->argv = new0(char*, n+1)))
1924                 return -ENOMEM;
1925
1926         n = 0;
1927         dbus_message_iter_recurse(&sub2, &sub3);
1928         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1929                 const char *s;
1930
1931                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1932                 dbus_message_iter_get_basic(&sub3, &s);
1933                 dbus_message_iter_next(&sub3);
1934
1935                 if (!(i->argv[n++] = strdup(s)))
1936                         return -ENOMEM;
1937         }
1938
1939         if (!dbus_message_iter_next(&sub2) ||
1940             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1941             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1942             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp_monotonic, true) < 0 ||
1943             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1944             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp_monotonic, true) < 0 ||
1945             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1946             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1947             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1948                 return -EIO;
1949
1950         i->ignore = ignore;
1951         i->start_timestamp = (usec_t) start_timestamp;
1952         i->exit_timestamp = (usec_t) exit_timestamp;
1953         i->pid = (pid_t) pid;
1954         i->code = code;
1955         i->status = status;
1956
1957         return 0;
1958 }
1959
1960 typedef struct UnitStatusInfo {
1961         const char *id;
1962         const char *load_state;
1963         const char *active_state;
1964         const char *sub_state;
1965
1966         const char *description;
1967         const char *following;
1968
1969         const char *path;
1970         const char *default_control_group;
1971
1972         usec_t inactive_exit_timestamp;
1973         usec_t active_enter_timestamp;
1974         usec_t active_exit_timestamp;
1975         usec_t inactive_enter_timestamp;
1976
1977         bool need_daemon_reload;
1978
1979         /* Service */
1980         pid_t main_pid;
1981         pid_t control_pid;
1982         const char *status_text;
1983         bool running:1;
1984 #ifdef HAVE_SYSV_COMPAT
1985         bool is_sysv:1;
1986 #endif
1987
1988         usec_t start_timestamp;
1989         usec_t exit_timestamp;
1990
1991         int exit_code, exit_status;
1992
1993         usec_t condition_timestamp;
1994         bool condition_result;
1995
1996         /* Socket */
1997         unsigned n_accepted;
1998         unsigned n_connections;
1999         bool accept;
2000
2001         /* Device */
2002         const char *sysfs_path;
2003
2004         /* Mount, Automount */
2005         const char *where;
2006
2007         /* Swap */
2008         const char *what;
2009
2010         LIST_HEAD(ExecStatusInfo, exec);
2011 } UnitStatusInfo;
2012
2013 static void print_status_info(UnitStatusInfo *i) {
2014         ExecStatusInfo *p;
2015         const char *on, *off, *ss;
2016         usec_t timestamp;
2017         char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1;
2018         char since2[FORMAT_TIMESTAMP_MAX], *s2;
2019
2020         assert(i);
2021
2022         /* This shows pretty information about a unit. See
2023          * print_property() for a low-level property printer */
2024
2025         printf("%s", strna(i->id));
2026
2027         if (i->description && !streq_ptr(i->id, i->description))
2028                 printf(" - %s", i->description);
2029
2030         printf("\n");
2031
2032         if (i->following)
2033                 printf("\t  Follow: unit currently follows state of %s\n", i->following);
2034
2035         if (streq_ptr(i->load_state, "failed") ||
2036             streq_ptr(i->load_state, "banned")) {
2037                 on = ansi_highlight(true);
2038                 off = ansi_highlight(false);
2039         } else
2040                 on = off = "";
2041
2042         if (i->path)
2043                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
2044         else
2045                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
2046
2047         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
2048
2049         if (streq_ptr(i->active_state, "failed")) {
2050                 on = ansi_highlight(true);
2051                 off = ansi_highlight(false);
2052         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
2053                 on = ansi_highlight_green(true);
2054                 off = ansi_highlight_green(false);
2055         } else
2056                 on = off = "";
2057
2058         if (ss)
2059                 printf("\t  Active: %s%s (%s)%s",
2060                        on,
2061                        strna(i->active_state),
2062                        ss,
2063                        off);
2064         else
2065                 printf("\t  Active: %s%s%s",
2066                        on,
2067                        strna(i->active_state),
2068                        off);
2069
2070         timestamp = (streq_ptr(i->active_state, "active")      ||
2071                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
2072                     (streq_ptr(i->active_state, "inactive")    ||
2073                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
2074                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
2075                                                                   i->active_exit_timestamp;
2076
2077         s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp);
2078         s2 = format_timestamp(since2, sizeof(since2), timestamp);
2079
2080         if (s1)
2081                 printf(" since %s; %s\n", s2, s1);
2082         else if (s2)
2083                 printf(" since %s\n", s2);
2084         else
2085                 printf("\n");
2086
2087         if (!i->condition_result && i->condition_timestamp > 0) {
2088                 s1 = format_timestamp_pretty(since1, sizeof(since1), i->condition_timestamp);
2089                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
2090
2091                 if (s1)
2092                         printf("\t          start condition failed at %s; %s\n", s2, s1);
2093                 else if (s2)
2094                         printf("\t          start condition failed at %s\n", s2);
2095         }
2096
2097         if (i->sysfs_path)
2098                 printf("\t  Device: %s\n", i->sysfs_path);
2099         if (i->where)
2100                 printf("\t   Where: %s\n", i->where);
2101         if (i->what)
2102                 printf("\t    What: %s\n", i->what);
2103
2104         if (i->accept)
2105                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
2106
2107         LIST_FOREACH(exec, p, i->exec) {
2108                 char *t;
2109                 bool good;
2110
2111                 /* Only show exited processes here */
2112                 if (p->code == 0)
2113                         continue;
2114
2115                 t = strv_join(p->argv, " ");
2116                 printf("\t Process: %u %s=%s ", p->pid, p->name, strna(t));
2117                 free(t);
2118
2119 #ifdef HAVE_SYSV_COMPAT
2120                 if (i->is_sysv)
2121                         good = is_clean_exit_lsb(p->code, p->status);
2122                 else
2123 #endif
2124                         good = is_clean_exit(p->code, p->status);
2125
2126                 if (!good) {
2127                         on = ansi_highlight(true);
2128                         off = ansi_highlight(false);
2129                 } else
2130                         on = off = "";
2131
2132                 printf("%s(code=%s, ", on, sigchld_code_to_string(p->code));
2133
2134                 if (p->code == CLD_EXITED) {
2135                         const char *c;
2136
2137                         printf("status=%i", p->status);
2138
2139 #ifdef HAVE_SYSV_COMPAT
2140                         if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
2141 #else
2142                         if ((c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD)))
2143 #endif
2144                                 printf("/%s", c);
2145
2146                 } else
2147                         printf("signal=%s", signal_to_string(p->status));
2148
2149                 printf(")%s\n", off);
2150
2151                 on = off = NULL;
2152
2153                 if (i->main_pid == p->pid &&
2154                     i->start_timestamp == p->start_timestamp &&
2155                     i->exit_timestamp == p->start_timestamp)
2156                         /* Let's not show this twice */
2157                         i->main_pid = 0;
2158
2159                 if (p->pid == i->control_pid)
2160                         i->control_pid = 0;
2161         }
2162
2163         if (i->main_pid > 0 || i->control_pid > 0) {
2164                 printf("\t");
2165
2166                 if (i->main_pid > 0) {
2167                         printf("Main PID: %u", (unsigned) i->main_pid);
2168
2169                         if (i->running) {
2170                                 char *t = NULL;
2171                                 get_process_name(i->main_pid, &t);
2172                                 if (t) {
2173                                         printf(" (%s)", t);
2174                                         free(t);
2175                                 }
2176                         } else if (i->exit_code > 0) {
2177                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
2178
2179                                 if (i->exit_code == CLD_EXITED) {
2180                                         const char *c;
2181
2182                                         printf("status=%i", i->exit_status);
2183
2184 #ifdef HAVE_SYSV_COMPAT
2185                                         if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
2186 #else
2187                                         if ((c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD)))
2188 #endif
2189                                                 printf("/%s", c);
2190
2191                                 } else
2192                                         printf("signal=%s", signal_to_string(i->exit_status));
2193                                 printf(")");
2194                         }
2195                 }
2196
2197                 if (i->main_pid > 0 && i->control_pid > 0)
2198                         printf(";");
2199
2200                 if (i->control_pid > 0) {
2201                         char *t = NULL;
2202
2203                         printf(" Control: %u", (unsigned) i->control_pid);
2204
2205                         get_process_name(i->control_pid, &t);
2206                         if (t) {
2207                                 printf(" (%s)", t);
2208                                 free(t);
2209                         }
2210                 }
2211
2212                 printf("\n");
2213         }
2214
2215         if (i->status_text)
2216                 printf("\t  Status: \"%s\"\n", i->status_text);
2217
2218         if (i->default_control_group) {
2219                 unsigned c;
2220
2221                 printf("\t  CGroup: %s\n", i->default_control_group);
2222
2223                 if (arg_transport != TRANSPORT_SSH) {
2224                         if ((c = columns()) > 18)
2225                                 c -= 18;
2226                         else
2227                                 c = 0;
2228
2229                         show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
2230                 }
2231         }
2232
2233         if (i->need_daemon_reload)
2234                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
2235                        ansi_highlight(true),
2236                        ansi_highlight(false),
2237                        arg_scope == UNIT_FILE_SYSTEM ? "--system" : "--user");
2238 }
2239
2240 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
2241
2242         assert(name);
2243         assert(iter);
2244         assert(i);
2245
2246         switch (dbus_message_iter_get_arg_type(iter)) {
2247
2248         case DBUS_TYPE_STRING: {
2249                 const char *s;
2250
2251                 dbus_message_iter_get_basic(iter, &s);
2252
2253                 if (!isempty(s)) {
2254                         if (streq(name, "Id"))
2255                                 i->id = s;
2256                         else if (streq(name, "LoadState"))
2257                                 i->load_state = s;
2258                         else if (streq(name, "ActiveState"))
2259                                 i->active_state = s;
2260                         else if (streq(name, "SubState"))
2261                                 i->sub_state = s;
2262                         else if (streq(name, "Description"))
2263                                 i->description = s;
2264                         else if (streq(name, "FragmentPath"))
2265                                 i->path = s;
2266 #ifdef HAVE_SYSV_COMPAT
2267                         else if (streq(name, "SysVPath")) {
2268                                 i->is_sysv = true;
2269                                 i->path = s;
2270                         }
2271 #endif
2272                         else if (streq(name, "DefaultControlGroup"))
2273                                 i->default_control_group = s;
2274                         else if (streq(name, "StatusText"))
2275                                 i->status_text = s;
2276                         else if (streq(name, "SysFSPath"))
2277                                 i->sysfs_path = s;
2278                         else if (streq(name, "Where"))
2279                                 i->where = s;
2280                         else if (streq(name, "What"))
2281                                 i->what = s;
2282                         else if (streq(name, "Following"))
2283                                 i->following = s;
2284                 }
2285
2286                 break;
2287         }
2288
2289         case DBUS_TYPE_BOOLEAN: {
2290                 dbus_bool_t b;
2291
2292                 dbus_message_iter_get_basic(iter, &b);
2293
2294                 if (streq(name, "Accept"))
2295                         i->accept = b;
2296                 else if (streq(name, "NeedDaemonReload"))
2297                         i->need_daemon_reload = b;
2298                 else if (streq(name, "ConditionResult"))
2299                         i->condition_result = b;
2300
2301                 break;
2302         }
2303
2304         case DBUS_TYPE_UINT32: {
2305                 uint32_t u;
2306
2307                 dbus_message_iter_get_basic(iter, &u);
2308
2309                 if (streq(name, "MainPID")) {
2310                         if (u > 0) {
2311                                 i->main_pid = (pid_t) u;
2312                                 i->running = true;
2313                         }
2314                 } else if (streq(name, "ControlPID"))
2315                         i->control_pid = (pid_t) u;
2316                 else if (streq(name, "ExecMainPID")) {
2317                         if (u > 0)
2318                                 i->main_pid = (pid_t) u;
2319                 } else if (streq(name, "NAccepted"))
2320                         i->n_accepted = u;
2321                 else if (streq(name, "NConnections"))
2322                         i->n_connections = u;
2323
2324                 break;
2325         }
2326
2327         case DBUS_TYPE_INT32: {
2328                 int32_t j;
2329
2330                 dbus_message_iter_get_basic(iter, &j);
2331
2332                 if (streq(name, "ExecMainCode"))
2333                         i->exit_code = (int) j;
2334                 else if (streq(name, "ExecMainStatus"))
2335                         i->exit_status = (int) j;
2336
2337                 break;
2338         }
2339
2340         case DBUS_TYPE_UINT64: {
2341                 uint64_t u;
2342
2343                 dbus_message_iter_get_basic(iter, &u);
2344
2345                 if (streq(name, "ExecMainStartTimestamp"))
2346                         i->start_timestamp = (usec_t) u;
2347                 else if (streq(name, "ExecMainExitTimestamp"))
2348                         i->exit_timestamp = (usec_t) u;
2349                 else if (streq(name, "ActiveEnterTimestamp"))
2350                         i->active_enter_timestamp = (usec_t) u;
2351                 else if (streq(name, "InactiveEnterTimestamp"))
2352                         i->inactive_enter_timestamp = (usec_t) u;
2353                 else if (streq(name, "InactiveExitTimestamp"))
2354                         i->inactive_exit_timestamp = (usec_t) u;
2355                 else if (streq(name, "ActiveExitTimestamp"))
2356                         i->active_exit_timestamp = (usec_t) u;
2357                 else if (streq(name, "ConditionTimestamp"))
2358                         i->condition_timestamp = (usec_t) u;
2359
2360                 break;
2361         }
2362
2363         case DBUS_TYPE_ARRAY: {
2364
2365                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
2366                     startswith(name, "Exec")) {
2367                         DBusMessageIter sub;
2368
2369                         dbus_message_iter_recurse(iter, &sub);
2370                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2371                                 ExecStatusInfo *info;
2372                                 int r;
2373
2374                                 if (!(info = new0(ExecStatusInfo, 1)))
2375                                         return -ENOMEM;
2376
2377                                 if (!(info->name = strdup(name))) {
2378                                         free(info);
2379                                         return -ENOMEM;
2380                                 }
2381
2382                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
2383                                         free(info);
2384                                         return r;
2385                                 }
2386
2387                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
2388
2389                                 dbus_message_iter_next(&sub);
2390                         }
2391                 }
2392
2393                 break;
2394         }
2395         }
2396
2397         return 0;
2398 }
2399
2400 static int print_property(const char *name, DBusMessageIter *iter) {
2401         assert(name);
2402         assert(iter);
2403
2404         /* This is a low-level property printer, see
2405          * print_status_info() for the nicer output */
2406
2407         if (arg_property && !strv_find(arg_property, name))
2408                 return 0;
2409
2410         switch (dbus_message_iter_get_arg_type(iter)) {
2411
2412         case DBUS_TYPE_STRUCT: {
2413                 DBusMessageIter sub;
2414                 dbus_message_iter_recurse(iter, &sub);
2415
2416                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2417                         uint32_t u;
2418
2419                         dbus_message_iter_get_basic(&sub, &u);
2420
2421                         if (u)
2422                                 printf("%s=%u\n", name, (unsigned) u);
2423                         else if (arg_all)
2424                                 printf("%s=\n", name);
2425
2426                         return 0;
2427                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2428                         const char *s;
2429
2430                         dbus_message_iter_get_basic(&sub, &s);
2431
2432                         if (arg_all || s[0])
2433                                 printf("%s=%s\n", name, s);
2434
2435                         return 0;
2436                 }
2437
2438                 break;
2439         }
2440
2441         case DBUS_TYPE_ARRAY:
2442
2443                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
2444                         DBusMessageIter sub, sub2;
2445
2446                         dbus_message_iter_recurse(iter, &sub);
2447                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2448                                 const char *path;
2449                                 dbus_bool_t ignore;
2450
2451                                 dbus_message_iter_recurse(&sub, &sub2);
2452
2453                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
2454                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
2455                                         printf("EnvironmentFile=%s (ignore_errors=%s)\n", path, yes_no(ignore));
2456
2457                                 dbus_message_iter_next(&sub);
2458                         }
2459
2460                         return 0;
2461
2462                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2463                         DBusMessageIter sub, sub2;
2464
2465                         dbus_message_iter_recurse(iter, &sub);
2466                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2467                                 const char *type, *path;
2468
2469                                 dbus_message_iter_recurse(&sub, &sub2);
2470
2471                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2472                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2473                                         printf("%s=%s\n", type, path);
2474
2475                                 dbus_message_iter_next(&sub);
2476                         }
2477
2478                         return 0;
2479
2480                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2481                         DBusMessageIter sub, sub2;
2482
2483                         dbus_message_iter_recurse(iter, &sub);
2484                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2485                                 const char *base;
2486                                 uint64_t value, next_elapse;
2487
2488                                 dbus_message_iter_recurse(&sub, &sub2);
2489
2490                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2491                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2492                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2493                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2494
2495                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2496                                                base,
2497                                                format_timespan(timespan1, sizeof(timespan1), value),
2498                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2499                                 }
2500
2501                                 dbus_message_iter_next(&sub);
2502                         }
2503
2504                         return 0;
2505
2506                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2507                         DBusMessageIter sub;
2508
2509                         dbus_message_iter_recurse(iter, &sub);
2510                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2511                                 ExecStatusInfo info;
2512
2513                                 zero(info);
2514                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2515                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2516                                         char *t;
2517
2518                                         t = strv_join(info.argv, " ");
2519
2520                                         printf("%s={ path=%s ; argv[]=%s ; ignore_errors=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2521                                                name,
2522                                                strna(info.path),
2523                                                strna(t),
2524                                                yes_no(info.ignore),
2525                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2526                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2527                                                (unsigned) info. pid,
2528                                                sigchld_code_to_string(info.code),
2529                                                info.status,
2530                                                info.code == CLD_EXITED ? "" : "/",
2531                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2532
2533                                         free(t);
2534                                 }
2535
2536                                 free(info.path);
2537                                 strv_free(info.argv);
2538
2539                                 dbus_message_iter_next(&sub);
2540                         }
2541
2542                         return 0;
2543                 }
2544
2545                 break;
2546         }
2547
2548         if (generic_print_property(name, iter, arg_all) > 0)
2549                 return 0;
2550
2551         if (arg_all)
2552                 printf("%s=[unprintable]\n", name);
2553
2554         return 0;
2555 }
2556
2557 static int show_one(const char *verb, DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2558         DBusMessage *m = NULL, *reply = NULL;
2559         const char *interface = "";
2560         int r;
2561         DBusError error;
2562         DBusMessageIter iter, sub, sub2, sub3;
2563         UnitStatusInfo info;
2564         ExecStatusInfo *p;
2565
2566         assert(bus);
2567         assert(path);
2568         assert(new_line);
2569
2570         zero(info);
2571         dbus_error_init(&error);
2572
2573         if (!(m = dbus_message_new_method_call(
2574                               "org.freedesktop.systemd1",
2575                               path,
2576                               "org.freedesktop.DBus.Properties",
2577                               "GetAll"))) {
2578                 log_error("Could not allocate message.");
2579                 r = -ENOMEM;
2580                 goto finish;
2581         }
2582
2583         if (!dbus_message_append_args(m,
2584                                       DBUS_TYPE_STRING, &interface,
2585                                       DBUS_TYPE_INVALID)) {
2586                 log_error("Could not append arguments to message.");
2587                 r = -ENOMEM;
2588                 goto finish;
2589         }
2590
2591         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2592                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2593                 r = -EIO;
2594                 goto finish;
2595         }
2596
2597         if (!dbus_message_iter_init(reply, &iter) ||
2598             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2599             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2600                 log_error("Failed to parse reply.");
2601                 r = -EIO;
2602                 goto finish;
2603         }
2604
2605         dbus_message_iter_recurse(&iter, &sub);
2606
2607         if (*new_line)
2608                 printf("\n");
2609
2610         *new_line = true;
2611
2612         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2613                 const char *name;
2614
2615                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2616                         log_error("Failed to parse reply.");
2617                         r = -EIO;
2618                         goto finish;
2619                 }
2620
2621                 dbus_message_iter_recurse(&sub, &sub2);
2622
2623                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2624                         log_error("Failed to parse reply.");
2625                         r = -EIO;
2626                         goto finish;
2627                 }
2628
2629                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2630                         log_error("Failed to parse reply.");
2631                         r = -EIO;
2632                         goto finish;
2633                 }
2634
2635                 dbus_message_iter_recurse(&sub2, &sub3);
2636
2637                 if (show_properties)
2638                         r = print_property(name, &sub3);
2639                 else
2640                         r = status_property(name, &sub3, &info);
2641
2642                 if (r < 0) {
2643                         log_error("Failed to parse reply.");
2644                         r = -EIO;
2645                         goto finish;
2646                 }
2647
2648                 dbus_message_iter_next(&sub);
2649         }
2650
2651         r = 0;
2652
2653         if (!show_properties)
2654                 print_status_info(&info);
2655
2656         if (!streq_ptr(info.active_state, "active") &&
2657             !streq_ptr(info.active_state, "reloading") &&
2658             streq(verb, "status"))
2659                 /* According to LSB: "program not running" */
2660                 r = 3;
2661
2662         while ((p = info.exec)) {
2663                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2664                 exec_status_info_free(p);
2665         }
2666
2667 finish:
2668         if (m)
2669                 dbus_message_unref(m);
2670
2671         if (reply)
2672                 dbus_message_unref(reply);
2673
2674         dbus_error_free(&error);
2675
2676         return r;
2677 }
2678
2679 static int show(DBusConnection *bus, char **args) {
2680         DBusMessage *m = NULL, *reply = NULL;
2681         int r, ret = 0;
2682         DBusError error;
2683         bool show_properties, new_line = false;
2684         char **name;
2685
2686         assert(bus);
2687         assert(args);
2688
2689         dbus_error_init(&error);
2690
2691         show_properties = !streq(args[0], "status");
2692
2693         if (show_properties)
2694                 pager_open_if_enabled();
2695
2696         if (show_properties && strv_length(args) <= 1) {
2697                 /* If not argument is specified inspect the manager
2698                  * itself */
2699
2700                 ret = show_one(args[0], bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2701                 goto finish;
2702         }
2703
2704         STRV_FOREACH(name, args+1) {
2705                 const char *path = NULL;
2706                 uint32_t id;
2707
2708                 if (safe_atou32(*name, &id) < 0) {
2709
2710                         /* Interpret as unit name */
2711
2712                         if (!(m = dbus_message_new_method_call(
2713                                               "org.freedesktop.systemd1",
2714                                               "/org/freedesktop/systemd1",
2715                                               "org.freedesktop.systemd1.Manager",
2716                                               "LoadUnit"))) {
2717                                 log_error("Could not allocate message.");
2718                                 ret = -ENOMEM;
2719                                 goto finish;
2720                         }
2721
2722                         if (!dbus_message_append_args(m,
2723                                                       DBUS_TYPE_STRING, name,
2724                                                       DBUS_TYPE_INVALID)) {
2725                                 log_error("Could not append arguments to message.");
2726                                 ret = -ENOMEM;
2727                                 goto finish;
2728                         }
2729
2730                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2731
2732                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2733                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2734                                         ret = -EIO;
2735                                         goto finish;
2736                                 }
2737
2738                                 dbus_error_free(&error);
2739
2740                                 dbus_message_unref(m);
2741                                 if (!(m = dbus_message_new_method_call(
2742                                                       "org.freedesktop.systemd1",
2743                                                       "/org/freedesktop/systemd1",
2744                                                       "org.freedesktop.systemd1.Manager",
2745                                                       "GetUnit"))) {
2746                                         log_error("Could not allocate message.");
2747                                         ret = -ENOMEM;
2748                                         goto finish;
2749                                 }
2750
2751                                 if (!dbus_message_append_args(m,
2752                                                               DBUS_TYPE_STRING, name,
2753                                                               DBUS_TYPE_INVALID)) {
2754                                         log_error("Could not append arguments to message.");
2755                                         ret = -ENOMEM;
2756                                         goto finish;
2757                                 }
2758
2759                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2760                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2761
2762                                         if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT))
2763                                                 ret = 4; /* According to LSB: "program or service status is unknown" */
2764                                         else
2765                                                 ret = -EIO;
2766                                         goto finish;
2767                                 }
2768                         }
2769
2770                 } else if (show_properties) {
2771
2772                         /* Interpret as job id */
2773
2774                         if (!(m = dbus_message_new_method_call(
2775                                               "org.freedesktop.systemd1",
2776                                               "/org/freedesktop/systemd1",
2777                                               "org.freedesktop.systemd1.Manager",
2778                                               "GetJob"))) {
2779                                 log_error("Could not allocate message.");
2780                                 ret = -ENOMEM;
2781                                 goto finish;
2782                         }
2783
2784                         if (!dbus_message_append_args(m,
2785                                                       DBUS_TYPE_UINT32, &id,
2786                                                       DBUS_TYPE_INVALID)) {
2787                                 log_error("Could not append arguments to message.");
2788                                 ret = -ENOMEM;
2789                                 goto finish;
2790                         }
2791
2792                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2793                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2794                                 ret = -EIO;
2795                                 goto finish;
2796                         }
2797                 } else {
2798
2799                         /* Interpret as PID */
2800
2801                         if (!(m = dbus_message_new_method_call(
2802                                               "org.freedesktop.systemd1",
2803                                               "/org/freedesktop/systemd1",
2804                                               "org.freedesktop.systemd1.Manager",
2805                                               "GetUnitByPID"))) {
2806                                 log_error("Could not allocate message.");
2807                                 ret = -ENOMEM;
2808                                 goto finish;
2809                         }
2810
2811                         if (!dbus_message_append_args(m,
2812                                                       DBUS_TYPE_UINT32, &id,
2813                                                       DBUS_TYPE_INVALID)) {
2814                                 log_error("Could not append arguments to message.");
2815                                 ret = -ENOMEM;
2816                                 goto finish;
2817                         }
2818
2819                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2820                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2821                                 ret = -EIO;
2822                                 goto finish;
2823                         }
2824                 }
2825
2826                 if (!dbus_message_get_args(reply, &error,
2827                                            DBUS_TYPE_OBJECT_PATH, &path,
2828                                            DBUS_TYPE_INVALID)) {
2829                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2830                         ret = -EIO;
2831                         goto finish;
2832                 }
2833
2834                 if ((r = show_one(args[0], bus, path, show_properties, &new_line)) != 0)
2835                         ret = r;
2836
2837                 dbus_message_unref(m);
2838                 dbus_message_unref(reply);
2839                 m = reply = NULL;
2840         }
2841
2842 finish:
2843         if (m)
2844                 dbus_message_unref(m);
2845
2846         if (reply)
2847                 dbus_message_unref(reply);
2848
2849         dbus_error_free(&error);
2850
2851         return ret;
2852 }
2853
2854 static int dump(DBusConnection *bus, char **args) {
2855         DBusMessage *m = NULL, *reply = NULL;
2856         DBusError error;
2857         int r;
2858         const char *text;
2859
2860         dbus_error_init(&error);
2861
2862         pager_open_if_enabled();
2863
2864         if (!(m = dbus_message_new_method_call(
2865                               "org.freedesktop.systemd1",
2866                               "/org/freedesktop/systemd1",
2867                               "org.freedesktop.systemd1.Manager",
2868                               "Dump"))) {
2869                 log_error("Could not allocate message.");
2870                 return -ENOMEM;
2871         }
2872
2873         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2874                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2875                 r = -EIO;
2876                 goto finish;
2877         }
2878
2879         if (!dbus_message_get_args(reply, &error,
2880                                    DBUS_TYPE_STRING, &text,
2881                                    DBUS_TYPE_INVALID)) {
2882                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2883                 r = -EIO;
2884                 goto finish;
2885         }
2886
2887         fputs(text, stdout);
2888
2889         r = 0;
2890
2891 finish:
2892         if (m)
2893                 dbus_message_unref(m);
2894
2895         if (reply)
2896                 dbus_message_unref(reply);
2897
2898         dbus_error_free(&error);
2899
2900         return r;
2901 }
2902
2903 static int snapshot(DBusConnection *bus, char **args) {
2904         DBusMessage *m = NULL, *reply = NULL;
2905         DBusError error;
2906         int r;
2907         const char *name = "", *path, *id;
2908         dbus_bool_t cleanup = FALSE;
2909         DBusMessageIter iter, sub;
2910         const char
2911                 *interface = "org.freedesktop.systemd1.Unit",
2912                 *property = "Id";
2913
2914         dbus_error_init(&error);
2915
2916         if (!(m = dbus_message_new_method_call(
2917                               "org.freedesktop.systemd1",
2918                               "/org/freedesktop/systemd1",
2919                               "org.freedesktop.systemd1.Manager",
2920                               "CreateSnapshot"))) {
2921                 log_error("Could not allocate message.");
2922                 return -ENOMEM;
2923         }
2924
2925         if (strv_length(args) > 1)
2926                 name = args[1];
2927
2928         if (!dbus_message_append_args(m,
2929                                       DBUS_TYPE_STRING, &name,
2930                                       DBUS_TYPE_BOOLEAN, &cleanup,
2931                                       DBUS_TYPE_INVALID)) {
2932                 log_error("Could not append arguments to message.");
2933                 r = -ENOMEM;
2934                 goto finish;
2935         }
2936
2937         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2938                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2939                 r = -EIO;
2940                 goto finish;
2941         }
2942
2943         if (!dbus_message_get_args(reply, &error,
2944                                    DBUS_TYPE_OBJECT_PATH, &path,
2945                                    DBUS_TYPE_INVALID)) {
2946                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2947                 r = -EIO;
2948                 goto finish;
2949         }
2950
2951         dbus_message_unref(m);
2952         if (!(m = dbus_message_new_method_call(
2953                               "org.freedesktop.systemd1",
2954                               path,
2955                               "org.freedesktop.DBus.Properties",
2956                               "Get"))) {
2957                 log_error("Could not allocate message.");
2958                 return -ENOMEM;
2959         }
2960
2961         if (!dbus_message_append_args(m,
2962                                       DBUS_TYPE_STRING, &interface,
2963                                       DBUS_TYPE_STRING, &property,
2964                                       DBUS_TYPE_INVALID)) {
2965                 log_error("Could not append arguments to message.");
2966                 r = -ENOMEM;
2967                 goto finish;
2968         }
2969
2970         dbus_message_unref(reply);
2971         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2972                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2973                 r = -EIO;
2974                 goto finish;
2975         }
2976
2977         if (!dbus_message_iter_init(reply, &iter) ||
2978             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2979                 log_error("Failed to parse reply.");
2980                 r = -EIO;
2981                 goto finish;
2982         }
2983
2984         dbus_message_iter_recurse(&iter, &sub);
2985
2986         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2987                 log_error("Failed to parse reply.");
2988                 r = -EIO;
2989                 goto finish;
2990         }
2991
2992         dbus_message_iter_get_basic(&sub, &id);
2993
2994         if (!arg_quiet)
2995                 puts(id);
2996         r = 0;
2997
2998 finish:
2999         if (m)
3000                 dbus_message_unref(m);
3001
3002         if (reply)
3003                 dbus_message_unref(reply);
3004
3005         dbus_error_free(&error);
3006
3007         return r;
3008 }
3009
3010 static int delete_snapshot(DBusConnection *bus, char **args) {
3011         DBusMessage *m = NULL, *reply = NULL;
3012         int r;
3013         DBusError error;
3014         char **name;
3015
3016         assert(bus);
3017         assert(args);
3018
3019         dbus_error_init(&error);
3020
3021         STRV_FOREACH(name, args+1) {
3022                 const char *path = NULL;
3023
3024                 if (!(m = dbus_message_new_method_call(
3025                                       "org.freedesktop.systemd1",
3026                                       "/org/freedesktop/systemd1",
3027                                       "org.freedesktop.systemd1.Manager",
3028                                       "GetUnit"))) {
3029                         log_error("Could not allocate message.");
3030                         r = -ENOMEM;
3031                         goto finish;
3032                 }
3033
3034                 if (!dbus_message_append_args(m,
3035                                               DBUS_TYPE_STRING, name,
3036                                               DBUS_TYPE_INVALID)) {
3037                         log_error("Could not append arguments to message.");
3038                         r = -ENOMEM;
3039                         goto finish;
3040                 }
3041
3042                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3043                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3044                         r = -EIO;
3045                         goto finish;
3046                 }
3047
3048                 if (!dbus_message_get_args(reply, &error,
3049                                            DBUS_TYPE_OBJECT_PATH, &path,
3050                                            DBUS_TYPE_INVALID)) {
3051                         log_error("Failed to parse reply: %s", bus_error_message(&error));
3052                         r = -EIO;
3053                         goto finish;
3054                 }
3055
3056                 dbus_message_unref(m);
3057                 if (!(m = dbus_message_new_method_call(
3058                                       "org.freedesktop.systemd1",
3059                                       path,
3060                                       "org.freedesktop.systemd1.Snapshot",
3061                                       "Remove"))) {
3062                         log_error("Could not allocate message.");
3063                         r = -ENOMEM;
3064                         goto finish;
3065                 }
3066
3067                 dbus_message_unref(reply);
3068                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3069                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3070                         r = -EIO;
3071                         goto finish;
3072                 }
3073
3074                 dbus_message_unref(m);
3075                 dbus_message_unref(reply);
3076                 m = reply = NULL;
3077         }
3078
3079         r = 0;
3080
3081 finish:
3082         if (m)
3083                 dbus_message_unref(m);
3084
3085         if (reply)
3086                 dbus_message_unref(reply);
3087
3088         dbus_error_free(&error);
3089
3090         return r;
3091 }
3092
3093 static int daemon_reload(DBusConnection *bus, char **args) {
3094         DBusMessage *m = NULL, *reply = NULL;
3095         DBusError error;
3096         int r;
3097         const char *method;
3098
3099         dbus_error_init(&error);
3100
3101         if (arg_action == ACTION_RELOAD)
3102                 method = "Reload";
3103         else if (arg_action == ACTION_REEXEC)
3104                 method = "Reexecute";
3105         else {
3106                 assert(arg_action == ACTION_SYSTEMCTL);
3107
3108                 method =
3109                         streq(args[0], "clear-jobs")    ||
3110                         streq(args[0], "cancel")        ? "ClearJobs" :
3111                         streq(args[0], "daemon-reexec") ? "Reexecute" :
3112                         streq(args[0], "reset-failed")  ? "ResetFailed" :
3113                         streq(args[0], "halt")          ? "Halt" :
3114                         streq(args[0], "poweroff")      ? "PowerOff" :
3115                         streq(args[0], "reboot")        ? "Reboot" :
3116                         streq(args[0], "kexec")         ? "KExec" :
3117                         streq(args[0], "exit")          ? "Exit" :
3118                                     /* "daemon-reload" */ "Reload";
3119         }
3120
3121         if (!(m = dbus_message_new_method_call(
3122                               "org.freedesktop.systemd1",
3123                               "/org/freedesktop/systemd1",
3124                               "org.freedesktop.systemd1.Manager",
3125                               method))) {
3126                 log_error("Could not allocate message.");
3127                 return -ENOMEM;
3128         }
3129
3130         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3131
3132                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
3133                         /* There's always a fallback possible for
3134                          * legacy actions. */
3135                         r = -EADDRNOTAVAIL;
3136                         goto finish;
3137                 }
3138
3139                 if (streq(method, "Reexecute") && dbus_error_has_name(&error, DBUS_ERROR_NO_REPLY)) {
3140                         /* On reexecution, we expect a disconnect, not
3141                          * a reply */
3142                         r = 0;
3143                         goto finish;
3144                 }
3145
3146                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3147                 r = -EIO;
3148                 goto finish;
3149         }
3150
3151         r = 0;
3152
3153 finish:
3154         if (m)
3155                 dbus_message_unref(m);
3156
3157         if (reply)
3158                 dbus_message_unref(reply);
3159
3160         dbus_error_free(&error);
3161
3162         return r;
3163 }
3164
3165 static int reset_failed(DBusConnection *bus, char **args) {
3166         DBusMessage *m = NULL, *reply = NULL;
3167         int r;
3168         DBusError error;
3169         char **name;
3170
3171         assert(bus);
3172         dbus_error_init(&error);
3173
3174         if (strv_length(args) <= 1)
3175                 return daemon_reload(bus, args);
3176
3177         STRV_FOREACH(name, args+1) {
3178
3179                 if (!(m = dbus_message_new_method_call(
3180                                       "org.freedesktop.systemd1",
3181                                       "/org/freedesktop/systemd1",
3182                                       "org.freedesktop.systemd1.Manager",
3183                                       "ResetFailedUnit"))) {
3184                         log_error("Could not allocate message.");
3185                         r = -ENOMEM;
3186                         goto finish;
3187                 }
3188
3189                 if (!dbus_message_append_args(m,
3190                                               DBUS_TYPE_STRING, name,
3191                                               DBUS_TYPE_INVALID)) {
3192                         log_error("Could not append arguments to message.");
3193                         r = -ENOMEM;
3194                         goto finish;
3195                 }
3196
3197                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3198                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3199                         r = -EIO;
3200                         goto finish;
3201                 }
3202
3203                 dbus_message_unref(m);
3204                 dbus_message_unref(reply);
3205                 m = reply = NULL;
3206         }
3207
3208         r = 0;
3209
3210 finish:
3211         if (m)
3212                 dbus_message_unref(m);
3213
3214         if (reply)
3215                 dbus_message_unref(reply);
3216
3217         dbus_error_free(&error);
3218
3219         return r;
3220 }
3221
3222 static int show_enviroment(DBusConnection *bus, char **args) {
3223         DBusMessage *m = NULL, *reply = NULL;
3224         DBusError error;
3225         DBusMessageIter iter, sub, sub2;
3226         int r;
3227         const char
3228                 *interface = "org.freedesktop.systemd1.Manager",
3229                 *property = "Environment";
3230
3231         dbus_error_init(&error);
3232
3233         pager_open_if_enabled();
3234
3235         if (!(m = dbus_message_new_method_call(
3236                               "org.freedesktop.systemd1",
3237                               "/org/freedesktop/systemd1",
3238                               "org.freedesktop.DBus.Properties",
3239                               "Get"))) {
3240                 log_error("Could not allocate message.");
3241                 return -ENOMEM;
3242         }
3243
3244         if (!dbus_message_append_args(m,
3245                                       DBUS_TYPE_STRING, &interface,
3246                                       DBUS_TYPE_STRING, &property,
3247                                       DBUS_TYPE_INVALID)) {
3248                 log_error("Could not append arguments to message.");
3249                 r = -ENOMEM;
3250                 goto finish;
3251         }
3252
3253         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3254                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3255                 r = -EIO;
3256                 goto finish;
3257         }
3258
3259         if (!dbus_message_iter_init(reply, &iter) ||
3260             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3261                 log_error("Failed to parse reply.");
3262                 r = -EIO;
3263                 goto finish;
3264         }
3265
3266         dbus_message_iter_recurse(&iter, &sub);
3267
3268         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
3269             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
3270                 log_error("Failed to parse reply.");
3271                 r = -EIO;
3272                 goto finish;
3273         }
3274
3275         dbus_message_iter_recurse(&sub, &sub2);
3276
3277         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
3278                 const char *text;
3279
3280                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
3281                         log_error("Failed to parse reply.");
3282                         r = -EIO;
3283                         goto finish;
3284                 }
3285
3286                 dbus_message_iter_get_basic(&sub2, &text);
3287                 printf("%s\n", text);
3288
3289                 dbus_message_iter_next(&sub2);
3290         }
3291
3292         r = 0;
3293
3294 finish:
3295         if (m)
3296                 dbus_message_unref(m);
3297
3298         if (reply)
3299                 dbus_message_unref(reply);
3300
3301         dbus_error_free(&error);
3302
3303         return r;
3304 }
3305
3306 static int set_environment(DBusConnection *bus, char **args) {
3307         DBusMessage *m = NULL, *reply = NULL;
3308         DBusError error;
3309         int r;
3310         const char *method;
3311         DBusMessageIter iter, sub;
3312         char **name;
3313
3314         dbus_error_init(&error);
3315
3316         method = streq(args[0], "set-environment")
3317                 ? "SetEnvironment"
3318                 : "UnsetEnvironment";
3319
3320         if (!(m = dbus_message_new_method_call(
3321                               "org.freedesktop.systemd1",
3322                               "/org/freedesktop/systemd1",
3323                               "org.freedesktop.systemd1.Manager",
3324                               method))) {
3325
3326                 log_error("Could not allocate message.");
3327                 return -ENOMEM;
3328         }
3329
3330         dbus_message_iter_init_append(m, &iter);
3331
3332         if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {
3333                 log_error("Could not append arguments to message.");
3334                 r = -ENOMEM;
3335                 goto finish;
3336         }
3337
3338         STRV_FOREACH(name, args+1)
3339                 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, name)) {
3340                         log_error("Could not append arguments to message.");
3341                         r = -ENOMEM;
3342                         goto finish;
3343                 }
3344
3345         if (!dbus_message_iter_close_container(&iter, &sub)) {
3346                 log_error("Could not append arguments to message.");
3347                 r = -ENOMEM;
3348                 goto finish;
3349         }
3350
3351         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3352                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3353                 r = -EIO;
3354                 goto finish;
3355         }
3356
3357         r = 0;
3358
3359 finish:
3360         if (m)
3361                 dbus_message_unref(m);
3362
3363         if (reply)
3364                 dbus_message_unref(reply);
3365
3366         dbus_error_free(&error);
3367
3368         return r;
3369 }
3370
3371 static int enable_sysv_units(char **args) {
3372         int r = 0;
3373
3374 #if defined (HAVE_SYSV_COMPAT) && (defined(TARGET_FEDORA) || defined(TARGET_MANDRIVA) || defined(TARGET_SUSE) || defined(TARGET_MEEGO) || defined(TARGET_ALTLINUX))
3375         const char *verb = args[0];
3376         unsigned f = 1, t = 1;
3377         LookupPaths paths;
3378
3379         if (arg_scope != UNIT_FILE_SYSTEM)
3380                 return 0;
3381
3382         if (!streq(verb, "enable") &&
3383             !streq(verb, "disable") &&
3384             !streq(verb, "is-enabled"))
3385                 return 0;
3386
3387         /* Processes all SysV units, and reshuffles the array so that
3388          * afterwards only the native units remain */
3389
3390         zero(paths);
3391         r = lookup_paths_init(&paths, MANAGER_SYSTEM, false);
3392         if (r < 0)
3393                 return r;
3394
3395         r = 0;
3396
3397         for (f = 1; args[f]; f++) {
3398                 const char *name;
3399                 char *p;
3400                 bool found_native = false, found_sysv;
3401                 unsigned c = 1;
3402                 const char *argv[6] = { "/sbin/chkconfig", NULL, NULL, NULL, NULL };
3403                 char **k, *l, *q = NULL;
3404                 int j;
3405                 pid_t pid;
3406                 siginfo_t status;
3407
3408                 name = args[f];
3409
3410                 if (!endswith(name, ".service"))
3411                         continue;
3412
3413                 if (path_is_absolute(name))
3414                         continue;
3415
3416                 STRV_FOREACH(k, paths.unit_path) {
3417                         p = NULL;
3418
3419                         if (!isempty(arg_root))
3420                                 asprintf(&p, "%s/%s/%s", arg_root, *k, name);
3421                         else
3422                                 asprintf(&p, "%s/%s", *k, name);
3423
3424                         if (!p) {
3425                                 log_error("No memory");
3426                                 r = -ENOMEM;
3427                                 goto finish;
3428                         }
3429
3430                         found_native = access(p, F_OK) >= 0;
3431                         free(p);
3432
3433                         if (found_native)
3434                                 break;
3435                 }
3436
3437                 if (found_native)
3438                         continue;
3439
3440                 p = NULL;
3441                 if (!isempty(arg_root))
3442                         asprintf(&p, "%s/" SYSTEM_SYSVINIT_PATH "/%s", arg_root, name);
3443                 else
3444                         asprintf(&p, SYSTEM_SYSVINIT_PATH "/%s", name);
3445                 if (!p) {
3446                         log_error("No memory");
3447                         r = -ENOMEM;
3448                         goto finish;
3449                 }
3450
3451                 p[strlen(p) - sizeof(".service") + 1] = 0;
3452                 found_sysv = access(p, F_OK) >= 0;
3453
3454                 if (!found_sysv) {
3455                         free(p);
3456                         continue;
3457                 }
3458
3459                 /* Mark this entry, so that we don't try enabling it as native unit */
3460                 args[f] = (char*) "";
3461
3462                 log_info("%s is not a native service, redirecting to /sbin/chkconfig.", name);
3463
3464                 if (!isempty(arg_root))
3465                         argv[c++] = q = strappend("--root=", arg_root);
3466
3467                 argv[c++] = file_name_from_path(p);
3468                 argv[c++] =
3469                         streq(verb, "enable") ? "on" :
3470                         streq(verb, "disable") ? "off" : "--level=5";
3471                 argv[c] = NULL;
3472
3473                 l = strv_join((char**)argv, " ");
3474                 if (!l) {
3475                         log_error("No memory.");
3476                         free(q);
3477                         free(p);
3478                         r = -ENOMEM;
3479                         goto finish;
3480                 }
3481
3482                 log_info("Executing %s", l);
3483                 free(l);
3484
3485                 pid = fork();
3486                 if (pid < 0) {
3487                         log_error("Failed to fork: %m");
3488                         free(p);
3489                         free(q);
3490                         r = -errno;
3491                         goto finish;
3492                 } else if (pid == 0) {
3493                         /* Child */
3494
3495                         execv(argv[0], (char**) argv);
3496                         _exit(EXIT_FAILURE);
3497                 }
3498
3499                 free(p);
3500                 free(q);
3501
3502                 j = wait_for_terminate(pid, &status);
3503                 if (j < 0) {
3504                         log_error("Failed to wait for child: %s", strerror(-r));
3505                         r = j;
3506                         goto finish;
3507                 }
3508
3509                 if (status.si_code == CLD_EXITED) {
3510                         if (streq(verb, "is-enabled")) {
3511                                 if (status.si_status == 0) {
3512                                         if (!arg_quiet)
3513                                                 puts("enabled");
3514                                         r = 1;
3515                                 } else {
3516                                         if (!arg_quiet)
3517                                                 puts("disabled");
3518                                 }
3519
3520                         } else if (status.si_status != 0) {
3521                                 r = -EINVAL;
3522                                 goto finish;
3523                         }
3524                 } else {
3525                         r = -EPROTO;
3526                         goto finish;
3527                 }
3528         }
3529
3530 finish:
3531         lookup_paths_free(&paths);
3532
3533         /* Drop all SysV units */
3534         for (f = 1, t = 1; args[f]; f++) {
3535
3536                 if (isempty(args[f]))
3537                         continue;
3538
3539                 args[t++] = args[f];
3540         }
3541
3542         args[t] = NULL;
3543
3544 #endif
3545         return r;
3546 }
3547
3548 static int enable_unit(DBusConnection *bus, char **args) {
3549         const char *verb = args[0];
3550         UnitFileChange *changes = NULL;
3551         unsigned n_changes = 0, i;
3552         int carries_install_info = -1;
3553         DBusMessage *m = NULL, *reply = NULL;
3554         int r;
3555         DBusError error;
3556
3557         dbus_error_init(&error);
3558
3559         r = enable_sysv_units(args);
3560         if (r < 0)
3561                 return r;
3562
3563         if (!bus || avoid_bus()) {
3564                 if (streq(verb, "enable")) {
3565                         r = unit_file_enable(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3566                         carries_install_info = r;
3567                 } else if (streq(verb, "disable"))
3568                         r = unit_file_disable(arg_scope, arg_runtime, arg_root, args+1, &changes, &n_changes);
3569                 else if (streq(verb, "reenable")) {
3570                         r = unit_file_reenable(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3571                         carries_install_info = r;
3572                 } else if (streq(verb, "link"))
3573                         r = unit_file_link(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3574                 else if (streq(verb, "preset")) {
3575                         r = unit_file_preset(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3576                         carries_install_info = r;
3577                 } else if (streq(verb, "mask"))
3578                         r = unit_file_mask(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3579                 else if (streq(verb, "unmask"))
3580                         r = unit_file_unmask(arg_scope, arg_runtime, arg_root, args+1, &changes, &n_changes);
3581                 else
3582                         assert_not_reached("Unknown verb");
3583
3584                 if (r < 0) {
3585                         log_error("Operation failed: %s", strerror(-r));
3586                         goto finish;
3587                 }
3588
3589                 for (i = 0; i < n_changes; i++) {
3590                         if (changes[i].type == UNIT_FILE_SYMLINK)
3591                                 log_info("ln -s '%s' '%s'", changes[i].source, changes[i].path);
3592                         else
3593                                 log_info("rm '%s'", changes[i].path);
3594                 }
3595
3596         } else {
3597                 const char *method;
3598                 bool send_force = true, expect_carries_install_info = false;
3599                 dbus_bool_t a, b;
3600                 DBusMessageIter iter, sub, sub2;
3601
3602                 if (streq(verb, "enable")) {
3603                         method = "EnableUnitFiles";
3604                         expect_carries_install_info = true;
3605                 } else if (streq(verb, "disable")) {
3606                         method = "DisableUnitFiles";
3607                         send_force = false;
3608                 } else if (streq(verb, "reenable")) {
3609                         method = "ReenableUnitFiles";
3610                         expect_carries_install_info = true;
3611                 } else if (streq(verb, "link"))
3612                         method = "LinkUnitFiles";
3613                 else if (streq(verb, "preset")) {
3614                         method = "PresetUnitFiles";
3615                         expect_carries_install_info = true;
3616                 } else if (streq(verb, "mask"))
3617                         method = "MaskUnitFiles";
3618                 else if (streq(verb, "unmask")) {
3619                         method = "UnmaskUnitFiles";
3620                         send_force = false;
3621                 } else
3622                         assert_not_reached("Unknown verb");
3623
3624                 m = dbus_message_new_method_call(
3625                                 "org.freedesktop.systemd1",
3626                                 "/org/freedesktop/systemd1",
3627                                 "org.freedesktop.systemd1.Manager",
3628                                 method);
3629                 if (!m) {
3630                         log_error("Out of memory");
3631                         r = -ENOMEM;
3632                         goto finish;
3633                 }
3634
3635                 dbus_message_iter_init_append(m, &iter);
3636
3637                 r = bus_append_strv_iter(&iter, args+1);
3638                 if (r < 0) {
3639                         log_error("Failed to append unit files.");
3640                         goto finish;
3641                 }
3642
3643                 a = arg_runtime;
3644                 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &a)) {
3645                         log_error("Failed to append runtime boolean.");
3646                         r = -ENOMEM;
3647                         goto finish;
3648                 }
3649
3650                 if (send_force) {
3651                         b = arg_force;
3652
3653                         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b)) {
3654                                 log_error("Failed to append force boolean.");
3655                                 r = -ENOMEM;
3656                                 goto finish;
3657                         }
3658                 }
3659
3660                 reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
3661                 if (!reply) {
3662                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3663                         r = -EIO;
3664                         goto finish;
3665                 }
3666
3667                 if (!dbus_message_iter_init(reply, &iter)) {
3668                         log_error("Failed to initialize iterator.");
3669                         goto finish;
3670                 }
3671
3672                 if (expect_carries_install_info) {
3673                         r = bus_iter_get_basic_and_next(&iter, DBUS_TYPE_BOOLEAN, &b, true);
3674                         if (r < 0) {
3675                                 log_error("Failed to parse reply.");
3676                                 goto finish;
3677                         }
3678
3679                         carries_install_info = b;
3680                 }
3681
3682                 if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
3683                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
3684                         log_error("Failed to parse reply.");
3685                         r = -EIO;
3686                         goto finish;
3687                 }
3688
3689                 dbus_message_iter_recurse(&iter, &sub);
3690                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
3691                         const char *type, *path, *source;
3692
3693                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
3694                                 log_error("Failed to parse reply.");
3695                                 r = -EIO;
3696                                 goto finish;
3697                         }
3698
3699                         dbus_message_iter_recurse(&sub, &sub2);
3700
3701                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
3702                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0 ||
3703                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &source, false) < 0) {
3704                                 log_error("Failed to parse reply.");
3705                                 r = -EIO;
3706                                 goto finish;
3707                         }
3708
3709                         if (streq(type, "symlink"))
3710                                 log_info("ln -s '%s' '%s'", source, path);
3711                         else
3712                                 log_info("rm '%s'", path);
3713
3714                         dbus_message_iter_next(&sub);
3715                 }
3716
3717                 /* Try to reload if enabeld */
3718                 if (!arg_no_reload)
3719                         r = daemon_reload(bus, args);
3720         }
3721
3722         if (carries_install_info == 0)
3723                 log_warning("Warning: unit files do not carry install information. No operation executed.");
3724
3725 finish:
3726         if (m)
3727                 dbus_message_unref(m);
3728
3729         if (reply)
3730                 dbus_message_unref(reply);
3731
3732         unit_file_changes_free(changes, n_changes);
3733
3734         dbus_error_free(&error);
3735         return r;
3736 }
3737
3738 static int unit_is_enabled(DBusConnection *bus, char **args) {
3739         DBusError error;
3740         int r;
3741         DBusMessage *m = NULL, *reply = NULL;
3742         bool enabled;
3743         char **name;
3744
3745         dbus_error_init(&error);
3746
3747         r = enable_sysv_units(args);
3748         if (r < 0)
3749                 return r;
3750
3751         enabled = r > 0;
3752
3753         if (!bus || avoid_bus()) {
3754
3755                 STRV_FOREACH(name, args+1) {
3756                         UnitFileState state;
3757
3758                         state = unit_file_get_state(arg_scope, arg_root, *name);
3759                         if (state < 0) {
3760                                 r = state;
3761                                 goto finish;
3762                         }
3763
3764                         if (state == UNIT_FILE_ENABLED ||
3765                             state == UNIT_FILE_ENABLED_RUNTIME ||
3766                             state == UNIT_FILE_STATIC)
3767                                 enabled = true;
3768
3769                         if (!arg_quiet)
3770                                 puts(unit_file_state_to_string(state));
3771                 }
3772
3773         } else {
3774                 STRV_FOREACH(name, args+1) {
3775                         const char *s;
3776
3777                         m = dbus_message_new_method_call(
3778                                         "org.freedesktop.systemd1",
3779                                         "/org/freedesktop/systemd1",
3780                                         "org.freedesktop.systemd1.Manager",
3781                                         "GetUnitFileState");
3782                         if (!m) {
3783                                 log_error("Out of memory");
3784                                 r = -ENOMEM;
3785                                 goto finish;
3786                         }
3787
3788                         if (!dbus_message_append_args(m,
3789                                                       DBUS_TYPE_STRING, name,
3790                                                       DBUS_TYPE_INVALID)) {
3791                                 log_error("Could not append arguments to message.");
3792                                 r = -ENOMEM;
3793                                 goto finish;
3794                         }
3795
3796                         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
3797                         if (!reply) {
3798                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3799                                 r = -EIO;
3800                                 goto finish;
3801                         }
3802
3803                         if (!dbus_message_get_args(reply, &error,
3804                                                    DBUS_TYPE_STRING, &s,
3805                                                    DBUS_TYPE_INVALID)) {
3806                                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3807                                 r = -EIO;
3808                                 goto finish;
3809                         }
3810
3811                         dbus_message_unref(m);
3812                         dbus_message_unref(reply);
3813                         m = reply = NULL;
3814
3815                         if (streq(s, "enabled") ||
3816                             streq(s, "enabled-runtime") ||
3817                             streq(s, "static"))
3818                                 enabled = true;
3819
3820                         if (!arg_quiet)
3821                                 puts(s);
3822                 }
3823         }
3824
3825         r = enabled ? 0 : 1;
3826
3827 finish:
3828         if (m)
3829                 dbus_message_unref(m);
3830
3831         if (reply)
3832                 dbus_message_unref(reply);
3833
3834         dbus_error_free(&error);
3835         return r;
3836 }
3837
3838 static int systemctl_help(void) {
3839
3840         pager_open_if_enabled();
3841
3842         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
3843                "Query or send control commands to the systemd manager.\n\n"
3844                "  -h --help           Show this help\n"
3845                "     --version        Show package version\n"
3846                "  -t --type=TYPE      List only units of a particular type\n"
3847                "  -p --property=NAME  Show only properties by this name\n"
3848                "  -a --all            Show all units/properties, including dead/empty ones\n"
3849                "     --failed         Show only failed units\n"
3850                "     --full           Don't ellipsize unit names on output\n"
3851                "     --fail           When queueing a new job, fail if conflicting jobs are\n"
3852                "                      pending\n"
3853                "     --ignore-dependencies\n"
3854                "                      When queueing a new job, ignore all its dependencies\n"
3855                "     --kill-who=WHO   Who to send signal to\n"
3856                "  -s --signal=SIGNAL  Which signal to send\n"
3857                "  -H --host=[USER@]HOST\n"
3858                "                      Show information for remote host\n"
3859                "  -P --privileged     Acquire privileges before execution\n"
3860                "  -q --quiet          Suppress output\n"
3861                "     --no-block       Do not wait until operation finished\n"
3862                "     --no-wall        Don't send wall message before halt/power-off/reboot\n"
3863                "     --no-reload      When enabling/disabling unit files, don't reload daemon\n"
3864                "                      configuration\n"
3865                "     --no-pager       Do not pipe output into a pager\n"
3866                "     --no-ask-password\n"
3867                "                      Do not ask for system passwords\n"
3868                "     --order          When generating graph for dot, show only order\n"
3869                "     --require        When generating graph for dot, show only requirement\n"
3870                "     --system         Connect to system manager\n"
3871                "     --user           Connect to user service manager\n"
3872                "     --global         Enable/disable unit files globally\n"
3873                "  -f --force          When enabling unit files, override existing symlinks\n"
3874                "                      When shutting down, execute action immediately\n"
3875                "     --root=PATH      Enable unit files in the specified root directory\n"
3876                "     --runtime        Enable unit files only temporarily until next reboot\n\n"
3877                "Unit Commands:\n"
3878                "  list-units                      List loaded units\n"
3879                "  start [NAME...]                 Start (activate) one or more units\n"
3880                "  stop [NAME...]                  Stop (deactivate) one or more units\n"
3881                "  reload [NAME...]                Reload one or more units\n"
3882                "  restart [NAME...]               Start or restart one or more units\n"
3883                "  try-restart [NAME...]           Restart one or more units if active\n"
3884                "  reload-or-restart [NAME...]     Reload one or more units is possible,\n"
3885                "                                  otherwise start or restart\n"
3886                "  reload-or-try-restart [NAME...] Reload one or more units is possible,\n"
3887                "                                  otherwise restart if active\n"
3888                "  isolate [NAME]                  Start one unit and stop all others\n"
3889                "  kill [NAME...]                  Send signal to processes of a unit\n"
3890                "  is-active [NAME...]             Check whether units are active\n"
3891                "  status [NAME...|PID...]         Show runtime status of one or more units\n"
3892                "  show [NAME...|JOB...]           Show properties of one or more\n"
3893                "                                  units/jobs or the manager\n"
3894                "  reset-failed [NAME...]          Reset failed state for all, one, or more\n"
3895                "                                  units\n"
3896                "  load [NAME...]                  Load one or more units\n\n"
3897                "Unit File Commands:\n"
3898                "  list-unit-files                 List installed unit files\n"
3899                "  enable [NAME...]                Enable one or more unit files\n"
3900                "  disable [NAME...]               Disable one or more unit files\n"
3901                "  reenable [NAME...]              Reenable one or more unit files\n"
3902                "  preset [NAME...]                Enable/disable one or more unit files\n"
3903                "                                  based on preset configuration\n"
3904                "  mask [NAME...]                  Mask one or more units\n"
3905                "  unmask [NAME...]                Unmask one or more units\n"
3906                "  link [PATH...]                  Link one or more units files into\n"
3907                "                                  the search path\n"
3908                "  is-enabled [NAME...]            Check whether unit files are enabled\n\n"
3909                "Job Commands:\n"
3910                "  list-jobs                       List jobs\n"
3911                "  cancel [JOB...]                 Cancel all, one, or more jobs\n\n"
3912                "Status Commands:\n"
3913                "  dump                            Dump server status\n"
3914                "  dot                             Dump dependency graph for dot(1)\n\n"
3915                "Snapshot Commands:\n"
3916                "  snapshot [NAME]                 Create a snapshot\n"
3917                "  delete [NAME...]                Remove one or more snapshots\n\n"
3918                "Environment Commands:\n"
3919                "  show-environment                Dump environment\n"
3920                "  set-environment [NAME=VALUE...] Set one or more environment variables\n"
3921                "  unset-environment [NAME...]     Unset one or more environment variables\n\n"
3922                "Manager Lifecycle Commands:\n"
3923                "  daemon-reload                   Reload systemd manager configuration\n"
3924                "  daemon-reexec                   Reexecute systemd manager\n\n"
3925                "System Commands:\n"
3926                "  default                         Enter system default mode\n"
3927                "  rescue                          Enter system rescue mode\n"
3928                "  emergency                       Enter system emergency mode\n"
3929                "  halt                            Shut down and halt the system\n"
3930                "  poweroff                        Shut down and power-off the system\n"
3931                "  reboot                          Shut down and reboot the system\n"
3932                "  kexec                           Shut down and reboot the system with kexec\n"
3933                "  exit                            Ask for user instance termination\n",
3934                program_invocation_short_name);
3935
3936         return 0;
3937 }
3938
3939 static int halt_help(void) {
3940
3941         printf("%s [OPTIONS...]\n\n"
3942                "%s the system.\n\n"
3943                "     --help      Show this help\n"
3944                "     --halt      Halt the machine\n"
3945                "  -p --poweroff  Switch off the machine\n"
3946                "     --reboot    Reboot the machine\n"
3947                "  -f --force     Force immediate halt/power-off/reboot\n"
3948                "  -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record\n"
3949                "  -d --no-wtmp   Don't write wtmp record\n"
3950                "  -n --no-sync   Don't sync before halt/power-off/reboot\n"
3951                "     --no-wall   Don't send wall message before halt/power-off/reboot\n",
3952                program_invocation_short_name,
3953                arg_action == ACTION_REBOOT   ? "Reboot" :
3954                arg_action == ACTION_POWEROFF ? "Power off" :
3955                                                "Halt");
3956
3957         return 0;
3958 }
3959
3960 static int shutdown_help(void) {
3961
3962         printf("%s [OPTIONS...] [TIME] [WALL...]\n\n"
3963                "Shut down the system.\n\n"
3964                "     --help      Show this help\n"
3965                "  -H --halt      Halt the machine\n"
3966                "  -P --poweroff  Power-off the machine\n"
3967                "  -r --reboot    Reboot the machine\n"
3968                "  -h             Equivalent to --poweroff, overriden by --halt\n"
3969                "  -k             Don't halt/power-off/reboot, just send warnings\n"
3970                "     --no-wall   Don't send wall message before halt/power-off/reboot\n"
3971                "  -c             Cancel a pending shutdown\n",
3972                program_invocation_short_name);
3973
3974         return 0;
3975 }
3976
3977 static int telinit_help(void) {
3978
3979         printf("%s [OPTIONS...] {COMMAND}\n\n"
3980                "Send control commands to the init daemon.\n\n"
3981                "     --help      Show this help\n"
3982                "     --no-wall   Don't send wall message before halt/power-off/reboot\n\n"
3983                "Commands:\n"
3984                "  0              Power-off the machine\n"
3985                "  6              Reboot the machine\n"
3986                "  2, 3, 4, 5     Start runlevelX.target unit\n"
3987                "  1, s, S        Enter rescue mode\n"
3988                "  q, Q           Reload init daemon configuration\n"
3989                "  u, U           Reexecute init daemon\n",
3990                program_invocation_short_name);
3991
3992         return 0;
3993 }
3994
3995 static int runlevel_help(void) {
3996
3997         printf("%s [OPTIONS...]\n\n"
3998                "Prints the previous and current runlevel of the init system.\n\n"
3999                "     --help      Show this help\n",
4000                program_invocation_short_name);
4001
4002         return 0;
4003 }
4004
4005 static int systemctl_parse_argv(int argc, char *argv[]) {
4006
4007         enum {
4008                 ARG_FAIL = 0x100,
4009                 ARG_IGNORE_DEPENDENCIES,
4010                 ARG_VERSION,
4011                 ARG_USER,
4012                 ARG_SYSTEM,
4013                 ARG_GLOBAL,
4014                 ARG_NO_BLOCK,
4015                 ARG_NO_PAGER,
4016                 ARG_NO_WALL,
4017                 ARG_ORDER,
4018                 ARG_REQUIRE,
4019                 ARG_ROOT,
4020                 ARG_FULL,
4021                 ARG_NO_RELOAD,
4022                 ARG_KILL_MODE,
4023                 ARG_KILL_WHO,
4024                 ARG_NO_ASK_PASSWORD,
4025                 ARG_FAILED,
4026                 ARG_RUNTIME
4027         };
4028
4029         static const struct option options[] = {
4030                 { "help",      no_argument,       NULL, 'h'           },
4031                 { "version",   no_argument,       NULL, ARG_VERSION   },
4032                 { "type",      required_argument, NULL, 't'           },
4033                 { "property",  required_argument, NULL, 'p'           },
4034                 { "all",       no_argument,       NULL, 'a'           },
4035                 { "failed",    no_argument,       NULL, ARG_FAILED    },
4036                 { "full",      no_argument,       NULL, ARG_FULL      },
4037                 { "fail",      no_argument,       NULL, ARG_FAIL      },
4038                 { "ignore-dependencies", no_argument, NULL, ARG_IGNORE_DEPENDENCIES },
4039                 { "user",      no_argument,       NULL, ARG_USER      },
4040                 { "system",    no_argument,       NULL, ARG_SYSTEM    },
4041                 { "global",    no_argument,       NULL, ARG_GLOBAL    },
4042                 { "no-block",  no_argument,       NULL, ARG_NO_BLOCK  },
4043                 { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
4044                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL   },
4045                 { "quiet",     no_argument,       NULL, 'q'           },
4046                 { "order",     no_argument,       NULL, ARG_ORDER     },
4047                 { "require",   no_argument,       NULL, ARG_REQUIRE   },
4048                 { "root",      required_argument, NULL, ARG_ROOT      },
4049                 { "force",     no_argument,       NULL, 'f'           },
4050                 { "no-reload", no_argument,       NULL, ARG_NO_RELOAD },
4051                 { "kill-mode", required_argument, NULL, ARG_KILL_MODE }, /* undocumented on purpose */
4052                 { "kill-who",  required_argument, NULL, ARG_KILL_WHO  },
4053                 { "signal",    required_argument, NULL, 's'           },
4054                 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
4055                 { "host",      required_argument, NULL, 'H'           },
4056                 { "privileged",no_argument,       NULL, 'P'           },
4057                 { "runtime",   no_argument,       NULL, ARG_RUNTIME   },
4058                 { NULL,        0,                 NULL, 0             }
4059         };
4060
4061         int c;
4062
4063         assert(argc >= 0);
4064         assert(argv);
4065
4066         /* Only when running as systemctl we ask for passwords */
4067         arg_ask_password = true;
4068
4069         while ((c = getopt_long(argc, argv, "ht:p:aqfs:H:P", options, NULL)) >= 0) {
4070
4071                 switch (c) {
4072
4073                 case 'h':
4074                         systemctl_help();
4075                         return 0;
4076
4077                 case ARG_VERSION:
4078                         puts(PACKAGE_STRING);
4079                         puts(DISTRIBUTION);
4080                         puts(SYSTEMD_FEATURES);
4081                         return 0;
4082
4083                 case 't':
4084                         arg_type = optarg;
4085                         break;
4086
4087                 case 'p': {
4088                         char **l;
4089
4090                         if (!(l = strv_append(arg_property, optarg)))
4091                                 return -ENOMEM;
4092
4093                         strv_free(arg_property);
4094                         arg_property = l;
4095
4096                         /* If the user asked for a particular
4097                          * property, show it to him, even if it is
4098                          * empty. */
4099                         arg_all = true;
4100                         break;
4101                 }
4102
4103                 case 'a':
4104                         arg_all = true;
4105                         break;
4106
4107                 case ARG_FAIL:
4108                         arg_job_mode = "fail";
4109                         break;
4110
4111                 case ARG_IGNORE_DEPENDENCIES:
4112                         arg_job_mode = "ignore-dependencies";
4113                         break;
4114
4115                 case ARG_USER:
4116                         arg_scope = UNIT_FILE_USER;
4117                         break;
4118
4119                 case ARG_SYSTEM:
4120                         arg_scope = UNIT_FILE_SYSTEM;
4121                         break;
4122
4123                 case ARG_GLOBAL:
4124                         arg_scope = UNIT_FILE_GLOBAL;
4125                         break;
4126
4127                 case ARG_NO_BLOCK:
4128                         arg_no_block = true;
4129                         break;
4130
4131                 case ARG_NO_PAGER:
4132                         arg_no_pager = true;
4133                         break;
4134
4135                 case ARG_NO_WALL:
4136                         arg_no_wall = true;
4137                         break;
4138
4139                 case ARG_ORDER:
4140                         arg_dot = DOT_ORDER;
4141                         break;
4142
4143                 case ARG_REQUIRE:
4144                         arg_dot = DOT_REQUIRE;
4145                         break;
4146
4147                 case ARG_ROOT:
4148                         arg_root = optarg;
4149                         break;
4150
4151                 case ARG_FULL:
4152                         arg_full = true;
4153                         break;
4154
4155                 case ARG_FAILED:
4156                         arg_failed = true;
4157                         break;
4158
4159                 case 'q':
4160                         arg_quiet = true;
4161                         break;
4162
4163                 case 'f':
4164                         arg_force = true;
4165                         break;
4166
4167                 case ARG_NO_RELOAD:
4168                         arg_no_reload = true;
4169                         break;
4170
4171                 case ARG_KILL_WHO:
4172                         arg_kill_who = optarg;
4173                         break;
4174
4175                 case ARG_KILL_MODE:
4176                         arg_kill_mode = optarg;
4177                         break;
4178
4179                 case 's':
4180                         if ((arg_signal = signal_from_string_try_harder(optarg)) < 0) {
4181                                 log_error("Failed to parse signal string %s.", optarg);
4182                                 return -EINVAL;
4183                         }
4184                         break;
4185
4186                 case ARG_NO_ASK_PASSWORD:
4187                         arg_ask_password = false;
4188                         break;
4189
4190                 case 'P':
4191                         arg_transport = TRANSPORT_POLKIT;
4192                         break;
4193
4194                 case 'H':
4195                         arg_transport = TRANSPORT_SSH;
4196                         arg_host = optarg;
4197                         break;
4198
4199                 case ARG_RUNTIME:
4200                         arg_runtime = true;
4201                         break;
4202
4203                 case '?':
4204                         return -EINVAL;
4205
4206                 default:
4207                         log_error("Unknown option code %c", c);
4208                         return -EINVAL;
4209                 }
4210         }
4211
4212         if (arg_transport != TRANSPORT_NORMAL && arg_scope != UNIT_FILE_SYSTEM) {
4213                 log_error("Cannot access user instance remotely.");
4214                 return -EINVAL;
4215         }
4216
4217         return 1;
4218 }
4219
4220 static int halt_parse_argv(int argc, char *argv[]) {
4221
4222         enum {
4223                 ARG_HELP = 0x100,
4224                 ARG_HALT,
4225                 ARG_REBOOT,
4226                 ARG_NO_WALL
4227         };
4228
4229         static const struct option options[] = {
4230                 { "help",      no_argument,       NULL, ARG_HELP    },
4231                 { "halt",      no_argument,       NULL, ARG_HALT    },
4232                 { "poweroff",  no_argument,       NULL, 'p'         },
4233                 { "reboot",    no_argument,       NULL, ARG_REBOOT  },
4234                 { "force",     no_argument,       NULL, 'f'         },
4235                 { "wtmp-only", no_argument,       NULL, 'w'         },
4236                 { "no-wtmp",   no_argument,       NULL, 'd'         },
4237                 { "no-sync",   no_argument,       NULL, 'n'         },
4238                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4239                 { NULL,        0,                 NULL, 0           }
4240         };
4241
4242         int c, runlevel;
4243
4244         assert(argc >= 0);
4245         assert(argv);
4246
4247         if (utmp_get_runlevel(&runlevel, NULL) >= 0)
4248                 if (runlevel == '0' || runlevel == '6')
4249                         arg_immediate = true;
4250
4251         while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) {
4252                 switch (c) {
4253
4254                 case ARG_HELP:
4255                         halt_help();
4256                         return 0;
4257
4258                 case ARG_HALT:
4259                         arg_action = ACTION_HALT;
4260                         break;
4261
4262                 case 'p':
4263                         if (arg_action != ACTION_REBOOT)
4264                                 arg_action = ACTION_POWEROFF;
4265                         break;
4266
4267                 case ARG_REBOOT:
4268                         arg_action = ACTION_REBOOT;
4269                         break;
4270
4271                 case 'f':
4272                         arg_immediate = true;
4273                         break;
4274
4275                 case 'w':
4276                         arg_dry = true;
4277                         break;
4278
4279                 case 'd':
4280                         arg_no_wtmp = true;
4281                         break;
4282
4283                 case 'n':
4284                         arg_no_sync = true;
4285                         break;
4286
4287                 case ARG_NO_WALL:
4288                         arg_no_wall = true;
4289                         break;
4290
4291                 case 'i':
4292                 case 'h':
4293                         /* Compatibility nops */
4294                         break;
4295
4296                 case '?':
4297                         return -EINVAL;
4298
4299                 default:
4300                         log_error("Unknown option code %c", c);
4301                         return -EINVAL;
4302                 }
4303         }
4304
4305         if (optind < argc) {
4306                 log_error("Too many arguments.");
4307                 return -EINVAL;
4308         }
4309
4310         return 1;
4311 }
4312
4313 static int parse_time_spec(const char *t, usec_t *_u) {
4314         assert(t);
4315         assert(_u);
4316
4317         if (streq(t, "now"))
4318                 *_u = 0;
4319         else if (!strchr(t, ':')) {
4320                 uint64_t u;
4321
4322                 if (safe_atou64(t, &u) < 0)
4323                         return -EINVAL;
4324
4325                 *_u = now(CLOCK_REALTIME) + USEC_PER_MINUTE * u;
4326         } else {
4327                 char *e = NULL;
4328                 long hour, minute;
4329                 struct tm tm;
4330                 time_t s;
4331                 usec_t n;
4332
4333                 errno = 0;
4334                 hour = strtol(t, &e, 10);
4335                 if (errno != 0 || *e != ':' || hour < 0 || hour > 23)
4336                         return -EINVAL;
4337
4338                 minute = strtol(e+1, &e, 10);
4339                 if (errno != 0 || *e != 0 || minute < 0 || minute > 59)
4340                         return -EINVAL;
4341
4342                 n = now(CLOCK_REALTIME);
4343                 s = (time_t) (n / USEC_PER_SEC);
4344
4345                 zero(tm);
4346                 assert_se(localtime_r(&s, &tm));
4347
4348                 tm.tm_hour = (int) hour;
4349                 tm.tm_min = (int) minute;
4350                 tm.tm_sec = 0;
4351
4352                 assert_se(s = mktime(&tm));
4353
4354                 *_u = (usec_t) s * USEC_PER_SEC;
4355
4356                 while (*_u <= n)
4357                         *_u += USEC_PER_DAY;
4358         }
4359
4360         return 0;
4361 }
4362
4363 static bool kexec_loaded(void) {
4364        bool loaded = false;
4365        char *s;
4366
4367        if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
4368                if (s[0] == '1')
4369                        loaded = true;
4370                free(s);
4371        }
4372        return loaded;
4373 }
4374
4375 static int shutdown_parse_argv(int argc, char *argv[]) {
4376
4377         enum {
4378                 ARG_HELP = 0x100,
4379                 ARG_NO_WALL
4380         };
4381
4382         static const struct option options[] = {
4383                 { "help",      no_argument,       NULL, ARG_HELP    },
4384                 { "halt",      no_argument,       NULL, 'H'         },
4385                 { "poweroff",  no_argument,       NULL, 'P'         },
4386                 { "reboot",    no_argument,       NULL, 'r'         },
4387                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4388                 { NULL,        0,                 NULL, 0           }
4389         };
4390
4391         int c, r;
4392
4393         assert(argc >= 0);
4394         assert(argv);
4395
4396         while ((c = getopt_long(argc, argv, "HPrhkt:afFc", options, NULL)) >= 0) {
4397                 switch (c) {
4398
4399                 case ARG_HELP:
4400                         shutdown_help();
4401                         return 0;
4402
4403                 case 'H':
4404                         arg_action = ACTION_HALT;
4405                         break;
4406
4407                 case 'P':
4408                         arg_action = ACTION_POWEROFF;
4409                         break;
4410
4411                 case 'r':
4412                         if (kexec_loaded())
4413                                 arg_action = ACTION_KEXEC;
4414                         else
4415                                 arg_action = ACTION_REBOOT;
4416                         break;
4417
4418                 case 'h':
4419                         if (arg_action != ACTION_HALT)
4420                                 arg_action = ACTION_POWEROFF;
4421                         break;
4422
4423                 case 'k':
4424                         arg_dry = true;
4425                         break;
4426
4427                 case ARG_NO_WALL:
4428                         arg_no_wall = true;
4429                         break;
4430
4431                 case 't':
4432                 case 'a':
4433                         /* Compatibility nops */
4434                         break;
4435
4436                 case 'c':
4437                         arg_action = ACTION_CANCEL_SHUTDOWN;
4438                         break;
4439
4440                 case '?':
4441                         return -EINVAL;
4442
4443                 default:
4444                         log_error("Unknown option code %c", c);
4445                         return -EINVAL;
4446                 }
4447         }
4448
4449         if (argc > optind) {
4450                 if ((r = parse_time_spec(argv[optind], &arg_when)) < 0) {
4451                         log_error("Failed to parse time specification: %s", argv[optind]);
4452                         return r;
4453                 }
4454         } else
4455                 arg_when = now(CLOCK_REALTIME) + USEC_PER_MINUTE;
4456
4457         /* We skip the time argument */
4458         if (argc > optind + 1)
4459                 arg_wall = argv + optind + 1;
4460
4461         optind = argc;
4462
4463         return 1;
4464 }
4465
4466 static int telinit_parse_argv(int argc, char *argv[]) {
4467
4468         enum {
4469                 ARG_HELP = 0x100,
4470                 ARG_NO_WALL
4471         };
4472
4473         static const struct option options[] = {
4474                 { "help",      no_argument,       NULL, ARG_HELP    },
4475                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4476                 { NULL,        0,                 NULL, 0           }
4477         };
4478
4479         static const struct {
4480                 char from;
4481                 enum action to;
4482         } table[] = {
4483                 { '0', ACTION_POWEROFF },
4484                 { '6', ACTION_REBOOT },
4485                 { '1', ACTION_RESCUE },
4486                 { '2', ACTION_RUNLEVEL2 },
4487                 { '3', ACTION_RUNLEVEL3 },
4488                 { '4', ACTION_RUNLEVEL4 },
4489                 { '5', ACTION_RUNLEVEL5 },
4490                 { 's', ACTION_RESCUE },
4491                 { 'S', ACTION_RESCUE },
4492                 { 'q', ACTION_RELOAD },
4493                 { 'Q', ACTION_RELOAD },
4494                 { 'u', ACTION_REEXEC },
4495                 { 'U', ACTION_REEXEC }
4496         };
4497
4498         unsigned i;
4499         int c;
4500
4501         assert(argc >= 0);
4502         assert(argv);
4503
4504         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
4505                 switch (c) {
4506
4507                 case ARG_HELP:
4508                         telinit_help();
4509                         return 0;
4510
4511                 case ARG_NO_WALL:
4512                         arg_no_wall = true;
4513                         break;
4514
4515                 case '?':
4516                         return -EINVAL;
4517
4518                 default:
4519                         log_error("Unknown option code %c", c);
4520                         return -EINVAL;
4521                 }
4522         }
4523
4524         if (optind >= argc) {
4525                 telinit_help();
4526                 return -EINVAL;
4527         }
4528
4529         if (optind + 1 < argc) {
4530                 log_error("Too many arguments.");
4531                 return -EINVAL;
4532         }
4533
4534         if (strlen(argv[optind]) != 1) {
4535                 log_error("Expected single character argument.");
4536                 return -EINVAL;
4537         }
4538
4539         for (i = 0; i < ELEMENTSOF(table); i++)
4540                 if (table[i].from == argv[optind][0])
4541                         break;
4542
4543         if (i >= ELEMENTSOF(table)) {
4544                 log_error("Unknown command %s.", argv[optind]);
4545                 return -EINVAL;
4546         }
4547
4548         arg_action = table[i].to;
4549
4550         optind ++;
4551
4552         return 1;
4553 }
4554
4555 static int runlevel_parse_argv(int argc, char *argv[]) {
4556
4557         enum {
4558                 ARG_HELP = 0x100,
4559         };
4560
4561         static const struct option options[] = {
4562                 { "help",      no_argument,       NULL, ARG_HELP    },
4563                 { NULL,        0,                 NULL, 0           }
4564         };
4565
4566         int c;
4567
4568         assert(argc >= 0);
4569         assert(argv);
4570
4571         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
4572                 switch (c) {
4573
4574                 case ARG_HELP:
4575                         runlevel_help();
4576                         return 0;
4577
4578                 case '?':
4579                         return -EINVAL;
4580
4581                 default:
4582                         log_error("Unknown option code %c", c);
4583                         return -EINVAL;
4584                 }
4585         }
4586
4587         if (optind < argc) {
4588                 log_error("Too many arguments.");
4589                 return -EINVAL;
4590         }
4591
4592         return 1;
4593 }
4594
4595 static int parse_argv(int argc, char *argv[]) {
4596         assert(argc >= 0);
4597         assert(argv);
4598
4599         if (program_invocation_short_name) {
4600
4601                 if (strstr(program_invocation_short_name, "halt")) {
4602                         arg_action = ACTION_HALT;
4603                         return halt_parse_argv(argc, argv);
4604                 } else if (strstr(program_invocation_short_name, "poweroff")) {
4605                         arg_action = ACTION_POWEROFF;
4606                         return halt_parse_argv(argc, argv);
4607                 } else if (strstr(program_invocation_short_name, "reboot")) {
4608                         if (kexec_loaded())
4609                                 arg_action = ACTION_KEXEC;
4610                         else
4611                                 arg_action = ACTION_REBOOT;
4612                         return halt_parse_argv(argc, argv);
4613                 } else if (strstr(program_invocation_short_name, "shutdown")) {
4614                         arg_action = ACTION_POWEROFF;
4615                         return shutdown_parse_argv(argc, argv);
4616                 } else if (strstr(program_invocation_short_name, "init")) {
4617
4618                         if (sd_booted() > 0) {
4619                                 arg_action = ACTION_INVALID;
4620                                 return telinit_parse_argv(argc, argv);
4621                         } else {
4622                                 /* Hmm, so some other init system is
4623                                  * running, we need to forward this
4624                                  * request to it. For now we simply
4625                                  * guess that it is Upstart. */
4626
4627                                 execv("/lib/upstart/telinit", argv);
4628
4629                                 log_error("Couldn't find an alternative telinit implementation to spawn.");
4630                                 return -EIO;
4631                         }
4632
4633                 } else if (strstr(program_invocation_short_name, "runlevel")) {
4634                         arg_action = ACTION_RUNLEVEL;
4635                         return runlevel_parse_argv(argc, argv);
4636                 }
4637         }
4638
4639         arg_action = ACTION_SYSTEMCTL;
4640         return systemctl_parse_argv(argc, argv);
4641 }
4642
4643 static int action_to_runlevel(void) {
4644
4645         static const char table[_ACTION_MAX] = {
4646                 [ACTION_HALT] =      '0',
4647                 [ACTION_POWEROFF] =  '0',
4648                 [ACTION_REBOOT] =    '6',
4649                 [ACTION_RUNLEVEL2] = '2',
4650                 [ACTION_RUNLEVEL3] = '3',
4651                 [ACTION_RUNLEVEL4] = '4',
4652                 [ACTION_RUNLEVEL5] = '5',
4653                 [ACTION_RESCUE] =    '1'
4654         };
4655
4656         assert(arg_action < _ACTION_MAX);
4657
4658         return table[arg_action];
4659 }
4660
4661 static int talk_upstart(void) {
4662         DBusMessage *m = NULL, *reply = NULL;
4663         DBusError error;
4664         int previous, rl, r;
4665         char
4666                 env1_buf[] = "RUNLEVEL=X",
4667                 env2_buf[] = "PREVLEVEL=X";
4668         char *env1 = env1_buf, *env2 = env2_buf;
4669         const char *emit = "runlevel";
4670         dbus_bool_t b_false = FALSE;
4671         DBusMessageIter iter, sub;
4672         DBusConnection *bus;
4673
4674         dbus_error_init(&error);
4675
4676         if (!(rl = action_to_runlevel()))
4677                 return 0;
4678
4679         if (utmp_get_runlevel(&previous, NULL) < 0)
4680                 previous = 'N';
4681
4682         if (!(bus = dbus_connection_open_private("unix:abstract=/com/ubuntu/upstart", &error))) {
4683                 if (dbus_error_has_name(&error, DBUS_ERROR_NO_SERVER)) {
4684                         r = 0;
4685                         goto finish;
4686                 }
4687
4688                 log_error("Failed to connect to Upstart bus: %s", bus_error_message(&error));
4689                 r = -EIO;
4690                 goto finish;
4691         }
4692
4693         if ((r = bus_check_peercred(bus)) < 0) {
4694                 log_error("Failed to verify owner of bus.");
4695                 goto finish;
4696         }
4697
4698         if (!(m = dbus_message_new_method_call(
4699                               "com.ubuntu.Upstart",
4700                               "/com/ubuntu/Upstart",
4701                               "com.ubuntu.Upstart0_6",
4702                               "EmitEvent"))) {
4703
4704                 log_error("Could not allocate message.");
4705                 r = -ENOMEM;
4706                 goto finish;
4707         }
4708
4709         dbus_message_iter_init_append(m, &iter);
4710
4711         env1_buf[sizeof(env1_buf)-2] = rl;
4712         env2_buf[sizeof(env2_buf)-2] = previous;
4713
4714         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &emit) ||
4715             !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub) ||
4716             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env1) ||
4717             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env2) ||
4718             !dbus_message_iter_close_container(&iter, &sub) ||
4719             !dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b_false)) {
4720                 log_error("Could not append arguments to message.");
4721                 r = -ENOMEM;
4722                 goto finish;
4723         }
4724
4725         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
4726
4727                 if (error_is_no_service(&error)) {
4728                         r = -EADDRNOTAVAIL;
4729                         goto finish;
4730                 }
4731
4732                 log_error("Failed to issue method call: %s", bus_error_message(&error));
4733                 r = -EIO;
4734                 goto finish;
4735         }
4736
4737         r = 1;
4738
4739 finish:
4740         if (m)
4741                 dbus_message_unref(m);
4742
4743         if (reply)
4744                 dbus_message_unref(reply);
4745
4746         if (bus) {
4747                 dbus_connection_flush(bus);
4748                 dbus_connection_close(bus);
4749                 dbus_connection_unref(bus);
4750         }
4751
4752         dbus_error_free(&error);
4753
4754         return r;
4755 }
4756
4757 static int talk_initctl(void) {
4758         struct init_request request;
4759         int r, fd;
4760         char rl;
4761
4762         if (!(rl = action_to_runlevel()))
4763                 return 0;
4764
4765         zero(request);
4766         request.magic = INIT_MAGIC;
4767         request.sleeptime = 0;
4768         request.cmd = INIT_CMD_RUNLVL;
4769         request.runlevel = rl;
4770
4771         if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 0) {
4772
4773                 if (errno == ENOENT)
4774                         return 0;
4775
4776                 log_error("Failed to open "INIT_FIFO": %m");
4777                 return -errno;
4778         }
4779
4780         errno = 0;
4781         r = loop_write(fd, &request, sizeof(request), false) != sizeof(request);
4782         close_nointr_nofail(fd);
4783
4784         if (r < 0) {
4785                 log_error("Failed to write to "INIT_FIFO": %m");
4786                 return errno ? -errno : -EIO;
4787         }
4788
4789         return 1;
4790 }
4791
4792 static int systemctl_main(DBusConnection *bus, int argc, char *argv[], DBusError *error) {
4793
4794         static const struct {
4795                 const char* verb;
4796                 const enum {
4797                         MORE,
4798                         LESS,
4799                         EQUAL
4800                 } argc_cmp;
4801                 const int argc;
4802                 int (* const dispatch)(DBusConnection *bus, char **args);
4803         } verbs[] = {
4804                 { "list-units",            LESS,  1, list_units        },
4805                 { "list-unit-files",       EQUAL, 1, list_unit_files   },
4806                 { "list-jobs",             EQUAL, 1, list_jobs         },
4807                 { "clear-jobs",            EQUAL, 1, daemon_reload     },
4808                 { "load",                  MORE,  2, load_unit         },
4809                 { "cancel",                MORE,  2, cancel_job        },
4810                 { "start",                 MORE,  2, start_unit        },
4811                 { "stop",                  MORE,  2, start_unit        },
4812                 { "condstop",              MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
4813                 { "reload",                MORE,  2, start_unit        },
4814                 { "restart",               MORE,  2, start_unit        },
4815                 { "try-restart",           MORE,  2, start_unit        },
4816                 { "reload-or-restart",     MORE,  2, start_unit        },
4817                 { "reload-or-try-restart", MORE,  2, start_unit        },
4818                 { "force-reload",          MORE,  2, start_unit        }, /* For compatibility with SysV */
4819                 { "condreload",            MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
4820                 { "condrestart",           MORE,  2, start_unit        }, /* For compatibility with RH */
4821                 { "isolate",               EQUAL, 2, start_unit        },
4822                 { "kill",                  MORE,  2, kill_unit         },
4823                 { "is-active",             MORE,  2, check_unit        },
4824                 { "check",                 MORE,  2, check_unit        },
4825                 { "show",                  MORE,  1, show              },
4826                 { "status",                MORE,  2, show              },
4827                 { "dump",                  EQUAL, 1, dump              },
4828                 { "dot",                   EQUAL, 1, dot               },
4829                 { "snapshot",              LESS,  2, snapshot          },
4830                 { "delete",                MORE,  2, delete_snapshot   },
4831                 { "daemon-reload",         EQUAL, 1, daemon_reload     },
4832                 { "daemon-reexec",         EQUAL, 1, daemon_reload     },
4833                 { "show-environment",      EQUAL, 1, show_enviroment   },
4834                 { "set-environment",       MORE,  2, set_environment   },
4835                 { "unset-environment",     MORE,  2, set_environment   },
4836                 { "halt",                  EQUAL, 1, start_special     },
4837                 { "poweroff",              EQUAL, 1, start_special     },
4838                 { "reboot",                EQUAL, 1, start_special     },
4839                 { "kexec",                 EQUAL, 1, start_special     },
4840                 { "default",               EQUAL, 1, start_special     },
4841                 { "rescue",                EQUAL, 1, start_special     },
4842                 { "emergency",             EQUAL, 1, start_special     },
4843                 { "exit",                  EQUAL, 1, start_special     },
4844                 { "reset-failed",          MORE,  1, reset_failed      },
4845                 { "enable",                MORE,  2, enable_unit       },
4846                 { "disable",               MORE,  2, enable_unit       },
4847                 { "is-enabled",            MORE,  2, unit_is_enabled   },
4848                 { "reenable",              MORE,  2, enable_unit       },
4849                 { "preset",                MORE,  2, enable_unit       },
4850                 { "mask",                  MORE,  2, enable_unit       },
4851                 { "unmask",                MORE,  2, enable_unit       },
4852                 { "link",                  MORE,  2, enable_unit       }
4853         };
4854
4855         int left;
4856         unsigned i;
4857
4858         assert(argc >= 0);
4859         assert(argv);
4860         assert(error);
4861
4862         left = argc - optind;
4863
4864         if (left <= 0)
4865                 /* Special rule: no arguments means "list-units" */
4866                 i = 0;
4867         else {
4868                 if (streq(argv[optind], "help")) {
4869                         systemctl_help();
4870                         return 0;
4871                 }
4872
4873                 for (i = 0; i < ELEMENTSOF(verbs); i++)
4874                         if (streq(argv[optind], verbs[i].verb))
4875                                 break;
4876
4877                 if (i >= ELEMENTSOF(verbs)) {
4878                         log_error("Unknown operation %s", argv[optind]);
4879                         return -EINVAL;
4880                 }
4881         }
4882
4883         switch (verbs[i].argc_cmp) {
4884
4885         case EQUAL:
4886                 if (left != verbs[i].argc) {
4887                         log_error("Invalid number of arguments.");
4888                         return -EINVAL;
4889                 }
4890
4891                 break;
4892
4893         case MORE:
4894                 if (left < verbs[i].argc) {
4895                         log_error("Too few arguments.");
4896                         return -EINVAL;
4897                 }
4898
4899                 break;
4900
4901         case LESS:
4902                 if (left > verbs[i].argc) {
4903                         log_error("Too many arguments.");
4904                         return -EINVAL;
4905                 }
4906
4907                 break;
4908
4909         default:
4910                 assert_not_reached("Unknown comparison operator.");
4911         }
4912
4913         /* Require a bus connection for all operations but
4914          * enable/disable */
4915         if (!streq(verbs[i].verb, "enable") &&
4916             !streq(verbs[i].verb, "disable") &&
4917             !streq(verbs[i].verb, "is-enable") &&
4918             !streq(verbs[i].verb, "reenable") &&
4919             !streq(verbs[i].verb, "preset") &&
4920             !streq(verbs[i].verb, "mask") &&
4921             !streq(verbs[i].verb, "unmask") &&
4922             !streq(verbs[i].verb, "link")) {
4923
4924                 if (running_in_chroot() > 0) {
4925                         log_info("Running in chroot, ignoring request.");
4926                         return 0;
4927                 }
4928
4929                 if (!bus && !avoid_bus()) {
4930                         log_error("Failed to get D-Bus connection: %s", error->message);
4931                         return -EIO;
4932                 }
4933         }
4934
4935         return verbs[i].dispatch(bus, argv + optind);
4936 }
4937
4938 static int send_shutdownd(usec_t t, char mode, bool dry_run, bool warn, const char *message) {
4939         int fd = -1;
4940         struct msghdr msghdr;
4941         struct iovec iovec;
4942         union sockaddr_union sockaddr;
4943         struct shutdownd_command c;
4944
4945         zero(c);
4946         c.elapse = t;
4947         c.mode = mode;
4948         c.dry_run = dry_run;
4949         c.warn_wall = warn;
4950
4951         if (message)
4952                 strncpy(c.wall_message, message, sizeof(c.wall_message));
4953
4954         if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0)
4955                 return -errno;
4956
4957         zero(sockaddr);
4958         sockaddr.sa.sa_family = AF_UNIX;
4959         sockaddr.un.sun_path[0] = 0;
4960         strncpy(sockaddr.un.sun_path, "/run/systemd/shutdownd", sizeof(sockaddr.un.sun_path));
4961
4962         zero(iovec);
4963         iovec.iov_base = (char*) &c;
4964         iovec.iov_len = sizeof(c);
4965
4966         zero(msghdr);
4967         msghdr.msg_name = &sockaddr;
4968         msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/systemd/shutdownd") - 1;
4969
4970         msghdr.msg_iov = &iovec;
4971         msghdr.msg_iovlen = 1;
4972
4973         if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0) {
4974                 close_nointr_nofail(fd);
4975                 return -errno;
4976         }
4977
4978         close_nointr_nofail(fd);
4979         return 0;
4980 }
4981
4982 static int reload_with_fallback(DBusConnection *bus) {
4983
4984         if (bus) {
4985                 /* First, try systemd via D-Bus. */
4986                 if (daemon_reload(bus, NULL) > 0)
4987                         return 0;
4988         }
4989
4990         /* Nothing else worked, so let's try signals */
4991         assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC);
4992
4993         if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) {
4994                 log_error("kill() failed: %m");
4995                 return -errno;
4996         }
4997
4998         return 0;
4999 }
5000
5001 static int start_with_fallback(DBusConnection *bus) {
5002
5003         if (bus) {
5004                 /* First, try systemd via D-Bus. */
5005                 if (start_unit(bus, NULL) >= 0)
5006                         goto done;
5007         }
5008
5009         /* Hmm, talking to systemd via D-Bus didn't work. Then
5010          * let's try to talk to Upstart via D-Bus. */
5011         if (talk_upstart() > 0)
5012                 goto done;
5013
5014         /* Nothing else worked, so let's try
5015          * /dev/initctl */
5016         if (talk_initctl() > 0)
5017                 goto done;
5018
5019         log_error("Failed to talk to init daemon.");
5020         return -EIO;
5021
5022 done:
5023         warn_wall(arg_action);
5024         return 0;
5025 }
5026
5027 static int halt_main(DBusConnection *bus) {
5028         int r;
5029
5030         if (geteuid() != 0) {
5031                 log_error("Must be root.");
5032                 return -EPERM;
5033         }
5034
5035         if (arg_when > 0) {
5036                 char *m;
5037                 char date[FORMAT_TIMESTAMP_MAX];
5038
5039                 m = strv_join(arg_wall, " ");
5040                 r = send_shutdownd(arg_when,
5041                                    arg_action == ACTION_HALT     ? 'H' :
5042                                    arg_action == ACTION_POWEROFF ? 'P' :
5043                                                                    'r',
5044                                    arg_dry,
5045                                    !arg_no_wall,
5046                                    m);
5047                 free(m);
5048
5049                 if (r < 0)
5050                         log_warning("Failed to talk to shutdownd, proceeding with immediate shutdown: %s", strerror(-r));
5051                 else {
5052                         log_info("Shutdown scheduled for %s, use 'shutdown -c' to cancel.",
5053                                  format_timestamp(date, sizeof(date), arg_when));
5054                         return 0;
5055                 }
5056         }
5057
5058         if (!arg_dry && !arg_immediate)
5059                 return start_with_fallback(bus);
5060
5061         if (!arg_no_wtmp) {
5062                 if (sd_booted() > 0)
5063                         log_debug("Not writing utmp record, assuming that systemd-update-utmp is used.");
5064                 else if ((r = utmp_put_shutdown(0)) < 0)
5065                         log_warning("Failed to write utmp record: %s", strerror(-r));
5066         }
5067
5068         if (!arg_no_sync)
5069                 sync();
5070
5071         if (arg_dry)
5072                 return 0;
5073
5074         /* Make sure C-A-D is handled by the kernel from this
5075          * point on... */
5076         reboot(RB_ENABLE_CAD);
5077
5078         switch (arg_action) {
5079
5080         case ACTION_HALT:
5081                 log_info("Halting.");
5082                 reboot(RB_HALT_SYSTEM);
5083                 break;
5084
5085         case ACTION_POWEROFF:
5086                 log_info("Powering off.");
5087                 reboot(RB_POWER_OFF);
5088                 break;
5089
5090         case ACTION_REBOOT:
5091                 log_info("Rebooting.");
5092                 reboot(RB_AUTOBOOT);
5093                 break;
5094
5095         default:
5096                 assert_not_reached("Unknown halt action.");
5097         }
5098
5099         /* We should never reach this. */
5100         return -ENOSYS;
5101 }
5102
5103 static int runlevel_main(void) {
5104         int r, runlevel, previous;
5105
5106         r = utmp_get_runlevel(&runlevel, &previous);
5107         if (r < 0) {
5108                 puts("unknown");
5109                 return r;
5110         }
5111
5112         printf("%c %c\n",
5113                previous <= 0 ? 'N' : previous,
5114                runlevel <= 0 ? 'N' : runlevel);
5115
5116         return 0;
5117 }
5118
5119 int main(int argc, char*argv[]) {
5120         int r, retval = EXIT_FAILURE;
5121         DBusConnection *bus = NULL;
5122         DBusError error;
5123
5124         dbus_error_init(&error);
5125
5126         log_parse_environment();
5127         log_open();
5128
5129         if ((r = parse_argv(argc, argv)) < 0)
5130                 goto finish;
5131         else if (r == 0) {
5132                 retval = EXIT_SUCCESS;
5133                 goto finish;
5134         }
5135
5136         /* /sbin/runlevel doesn't need to communicate via D-Bus, so
5137          * let's shortcut this */
5138         if (arg_action == ACTION_RUNLEVEL) {
5139                 r = runlevel_main();
5140                 retval = r < 0 ? EXIT_FAILURE : r;
5141                 goto finish;
5142         }
5143
5144         if (running_in_chroot() > 0 && arg_action != ACTION_SYSTEMCTL) {
5145                 log_info("Running in chroot, ignoring request.");
5146                 retval = 0;
5147                 goto finish;
5148         }
5149
5150         if (!avoid_bus()) {
5151                 if (arg_transport == TRANSPORT_NORMAL)
5152                         bus_connect(arg_scope == UNIT_FILE_SYSTEM ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, &bus, &private_bus, &error);
5153                 else if (arg_transport == TRANSPORT_POLKIT) {
5154                         bus_connect_system_polkit(&bus, &error);
5155                         private_bus = false;
5156                 } else if (arg_transport == TRANSPORT_SSH) {
5157                         bus_connect_system_ssh(NULL, arg_host, &bus, &error);
5158                         private_bus = false;
5159                 } else
5160                         assert_not_reached("Uh, invalid transport...");
5161         }
5162
5163         switch (arg_action) {
5164
5165         case ACTION_SYSTEMCTL:
5166                 r = systemctl_main(bus, argc, argv, &error);
5167                 break;
5168
5169         case ACTION_HALT:
5170         case ACTION_POWEROFF:
5171         case ACTION_REBOOT:
5172         case ACTION_KEXEC:
5173                 r = halt_main(bus);
5174                 break;
5175
5176         case ACTION_RUNLEVEL2:
5177         case ACTION_RUNLEVEL3:
5178         case ACTION_RUNLEVEL4:
5179         case ACTION_RUNLEVEL5:
5180         case ACTION_RESCUE:
5181         case ACTION_EMERGENCY:
5182         case ACTION_DEFAULT:
5183                 r = start_with_fallback(bus);
5184                 break;
5185
5186         case ACTION_RELOAD:
5187         case ACTION_REEXEC:
5188                 r = reload_with_fallback(bus);
5189                 break;
5190
5191         case ACTION_CANCEL_SHUTDOWN:
5192                 r = send_shutdownd(0, 0, false, false, NULL);
5193                 break;
5194
5195         case ACTION_INVALID:
5196         case ACTION_RUNLEVEL:
5197         default:
5198                 assert_not_reached("Unknown action");
5199         }
5200
5201         retval = r < 0 ? EXIT_FAILURE : r;
5202
5203 finish:
5204         if (bus) {
5205                 dbus_connection_flush(bus);
5206                 dbus_connection_close(bus);
5207                 dbus_connection_unref(bus);
5208         }
5209
5210         dbus_error_free(&error);
5211
5212         dbus_shutdown();
5213
5214         strv_free(arg_property);
5215
5216         pager_close();
5217         agent_close();
5218
5219         return retval;
5220 }