src/systemctl/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 Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 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   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser 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 <locale.h>
  26 #include <stdbool.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <sys/ioctl.h>
  30 #include <termios.h>
  31 #include <unistd.h>
  32 #include <fcntl.h>
  33 #include <sys/socket.h>
  34 #include <sys/stat.h>
  35 #include <stddef.h>
  36 #include <sys/prctl.h>
  37 #include <dbus/dbus.h>
  38
  39 #include <systemd/sd-daemon.h>
  40 #include <systemd/sd-shutdown.h>
  41 #include <systemd/sd-login.h>
  42
  43 #include "log.h"
  44 #include "util.h"
  45 #include "macro.h"
  46 #include "set.h"
  47 #include "utmp-wtmp.h"
  48 #include "special.h"
  49 #include "initreq.h"
  50 #include "path-util.h"
  51 #include "strv.h"
  52 #include "dbus-common.h"
  53 #include "cgroup-show.h"
  54 #include "cgroup-util.h"
  55 #include "list.h"
  56 #include "path-lookup.h"
  57 #include "conf-parser.h"
  58 #include "exit-status.h"
  59 #include "bus-errors.h"
  60 #include "build.h"
  61 #include "unit-name.h"
  62 #include "pager.h"
  63 #include "spawn-ask-password-agent.h"
  64 #include "spawn-polkit-agent.h"
  65 #include "install.h"
  66 #include "logs-show.h"
  67 #include "path-util.h"
  68 #include "socket-util.h"
  69 #include "fileio.h"
  70
  71 static const char *arg_type = NULL;
  72 static const char *arg_load_state = NULL;
  73 static char **arg_property = NULL;
  74 static bool arg_all = false;
  75 static const char *arg_job_mode = "replace";
  76 static UnitFileScope arg_scope = UNIT_FILE_SYSTEM;
  77 static bool arg_no_block = false;
  78 static bool arg_no_legend = false;
  79 static bool arg_no_pager = false;
  80 static bool arg_no_wtmp = false;
  81 static bool arg_no_wall = false;
  82 static bool arg_no_reload = false;
  83 static bool arg_ignore_inhibitors = false;
  84 static bool arg_dry = false;
  85 static bool arg_quiet = false;
  86 static bool arg_full = false;
  87 static int arg_force = 0;
  88 static bool arg_ask_password = true;
  89 static bool arg_failed = false;
  90 static bool arg_runtime = false;
  91 static char **arg_wall = NULL;
  92 static const char *arg_kill_who = NULL;
  93 static int arg_signal = SIGTERM;
  94 static const char *arg_root = NULL;
  95 static usec_t arg_when = 0;
  96 static enum action {
  97         ACTION_INVALID,
  98         ACTION_SYSTEMCTL,
  99         ACTION_HALT,
 100         ACTION_POWEROFF,
 101         ACTION_REBOOT,
 102         ACTION_KEXEC,
 103         ACTION_EXIT,
 104         ACTION_SUSPEND,
 105         ACTION_HIBERNATE,
 106         ACTION_HYBRID_SLEEP,
 107         ACTION_RUNLEVEL2,
 108         ACTION_RUNLEVEL3,
 109         ACTION_RUNLEVEL4,
 110         ACTION_RUNLEVEL5,
 111         ACTION_RESCUE,
 112         ACTION_EMERGENCY,
 113         ACTION_DEFAULT,
 114         ACTION_RELOAD,
 115         ACTION_REEXEC,
 116         ACTION_RUNLEVEL,
 117         ACTION_CANCEL_SHUTDOWN,
 118         _ACTION_MAX
 119 } arg_action = ACTION_SYSTEMCTL;
 120 static enum transport {
 121         TRANSPORT_NORMAL,
 122         TRANSPORT_SSH,
 123         TRANSPORT_POLKIT
 124 } arg_transport = TRANSPORT_NORMAL;
 125 static const char *arg_host = NULL;
 126 static unsigned arg_lines = 10;
 127 static OutputMode arg_output = OUTPUT_SHORT;
 128
 129 static bool private_bus = false;
 130
 131 static int daemon_reload(DBusConnection *bus, char **args);
 132 static void halt_now(enum action a);
 133
 134 static void pager_open_if_enabled(void) {
 135
 136         if (arg_no_pager)
 137                 return;
 138
 139         pager_open();
 140 }
 141
 142 static void ask_password_agent_open_if_enabled(void) {
 143
 144         /* Open the password agent as a child process if necessary */
 145
 146         if (!arg_ask_password)
 147                 return;
 148
 149         if (arg_scope != UNIT_FILE_SYSTEM)
 150                 return;
 151
 152         ask_password_agent_open();
 153 }
 154
 155 #ifdef HAVE_LOGIND
 156 static void polkit_agent_open_if_enabled(void) {
 157
 158         /* Open the polkit agent as a child process if necessary */
 159
 160         if (!arg_ask_password)
 161                 return;
 162
 163         if (arg_scope != UNIT_FILE_SYSTEM)
 164                 return;
 165
 166         polkit_agent_open();
 167 }
 168 #endif
 169
 170 static const char *ansi_highlight(bool b) {
 171
 172         if (!on_tty())
 173                 return "";
 174
 175         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
 176 }
 177
 178 static const char *ansi_highlight_red(bool b) {
 179
 180         if (!on_tty())
 181                 return "";
 182
 183         return b ? ANSI_HIGHLIGHT_RED_ON : ANSI_HIGHLIGHT_OFF;
 184 }
 185
 186 static const char *ansi_highlight_green(bool b) {
 187
 188         if (!on_tty())
 189                 return "";
 190
 191         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
 192 }
 193
 194 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
 195         assert(error);
 196
 197         if (!dbus_error_is_set(error))
 198                 return r;
 199
 200         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
 201             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
 202             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
 203             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
 204                 return EXIT_NOPERMISSION;
 205
 206         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
 207                 return EXIT_NOTINSTALLED;
 208
 209         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
 210             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
 211                 return EXIT_NOTIMPLEMENTED;
 212
 213         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
 214                 return EXIT_NOTCONFIGURED;
 215
 216         if (r != 0)
 217                 return r;
 218
 219         return EXIT_FAILURE;
 220 }
 221
 222 static void warn_wall(enum action a) {
 223         static const char *table[_ACTION_MAX] = {
 224                 [ACTION_HALT]            = "The system is going down for system halt NOW!",
 225                 [ACTION_REBOOT]          = "The system is going down for reboot NOW!",
 226                 [ACTION_POWEROFF]        = "The system is going down for power-off NOW!",
 227                 [ACTION_KEXEC]           = "The system is going down for kexec reboot NOW!",
 228                 [ACTION_RESCUE]          = "The system is going down to rescue mode NOW!",
 229                 [ACTION_EMERGENCY]       = "The system is going down to emergency mode NOW!",
 230                 [ACTION_CANCEL_SHUTDOWN] = "The system shutdown has been cancelled NOW!"
 231         };
 232
 233         if (arg_no_wall)
 234                 return;
 235
 236         if (arg_wall) {
 237                 _cleanup_free_ char *p;
 238
 239                 p = strv_join(arg_wall, " ");
 240                 if (!p) {
 241                         log_oom();
 242                         return;
 243                 }
 244
 245                 if (*p) {
 246                         utmp_wall(p, NULL);
 247                         return;
 248                 }
 249         }
 250
 251         if (!table[a])
 252                 return;
 253
 254         utmp_wall(table[a], NULL);
 255 }
 256
 257 static bool avoid_bus(void) {
 258
 259         if (running_in_chroot() > 0)
 260                 return true;
 261
 262         if (sd_booted() <= 0)
 263                 return true;
 264
 265         if (!isempty(arg_root))
 266                 return true;
 267
 268         if (arg_scope == UNIT_FILE_GLOBAL)
 269                 return true;
 270
 271         return false;
 272 }
 273
 274 static int compare_unit_info(const void *a, const void *b) {
 275         const char *d1, *d2;
 276         const struct unit_info *u = a, *v = b;
 277
 278         d1 = strrchr(u->id, '.');
 279         d2 = strrchr(v->id, '.');
 280
 281         if (d1 && d2) {
 282                 int r;
 283
 284                 r = strcasecmp(d1, d2);
 285                 if (r != 0)
 286                         return r;
 287         }
 288
 289         return strcasecmp(u->id, v->id);
 290 }
 291
 292 static bool output_show_unit(const struct unit_info *u) {
 293         const char *dot;
 294
 295         if (arg_failed)
 296                 return streq(u->active_state, "failed");
 297
 298         return (!arg_type || ((dot = strrchr(u->id, '.')) &&
 299                               streq(dot+1, arg_type))) &&
 300                 (!arg_load_state || streq(u->load_state, arg_load_state)) &&
 301                 (arg_all || !(streq(u->active_state, "inactive")
 302                               || u->following[0]) || u->job_id > 0);
 303 }
 304
 305 static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
 306         unsigned id_len, max_id_len, active_len, sub_len, job_len, desc_len, n_shown = 0;
 307         const struct unit_info *u;
 308         int job_count = 0;
 309
 310         max_id_len = sizeof("UNIT")-1;
 311         active_len = sizeof("ACTIVE")-1;
 312         sub_len = sizeof("SUB")-1;
 313         job_len = sizeof("JOB")-1;
 314         desc_len = 0;
 315
 316         for (u = unit_infos; u < unit_infos + c; u++) {
 317                 if (!output_show_unit(u))
 318                         continue;
 319
 320                 max_id_len = MAX(max_id_len, strlen(u->id));
 321                 active_len = MAX(active_len, strlen(u->active_state));
 322                 sub_len = MAX(sub_len, strlen(u->sub_state));
 323                 if (u->job_id != 0) {
 324                         job_len = MAX(job_len, strlen(u->job_type));
 325                         job_count++;
 326                 }
 327         }
 328
 329         if (!arg_full) {
 330                 unsigned basic_len;
 331                 id_len = MIN(max_id_len, 25);
 332                 basic_len = 5 + id_len + 5 + active_len + sub_len;
 333                 if (job_count)
 334                         basic_len += job_len + 1;
 335                 if (basic_len < (unsigned) columns()) {
 336                         unsigned extra_len, incr;
 337                         extra_len = columns() - basic_len;
 338                         /* Either UNIT already got 25, or is fully satisfied.
 339                          * Grant up to 25 to DESC now. */
 340                         incr = MIN(extra_len, 25);
 341                         desc_len += incr;
 342                         extra_len -= incr;
 343                         /* split the remaining space between UNIT and DESC,
 344                          * but do not give UNIT more than it needs. */
 345                         if (extra_len > 0) {
 346                                 incr = MIN(extra_len / 2, max_id_len - id_len);
 347                                 id_len += incr;
 348                                 desc_len += extra_len - incr;
 349                         }
 350                 }
 351         } else
 352                 id_len = max_id_len;
 353
 354         for (u = unit_infos; u < unit_infos + c; u++) {
 355                 char _cleanup_free_ *e = NULL;
 356                 const char *on_loaded, *off_loaded;
 357                 const char *on_active, *off_active;
 358
 359                 if (!output_show_unit(u))
 360                         continue;
 361
 362                 if (!n_shown && !arg_no_legend) {
 363                         printf("%-*s %-6s %-*s %-*s ", id_len, "UNIT", "LOAD",
 364                                active_len, "ACTIVE", sub_len, "SUB");
 365                         if (job_count)
 366                                 printf("%-*s ", job_len, "JOB");
 367                         if (!arg_full && arg_no_pager)
 368                                 printf("%.*s\n", desc_len, "DESCRIPTION");
 369                         else
 370                                 printf("%s\n", "DESCRIPTION");
 371                 }
 372
 373                 n_shown++;
 374
 375                 if (streq(u->load_state, "error")) {
 376                         on_loaded = ansi_highlight_red(true);
 377                         off_loaded = ansi_highlight_red(false);
 378                 } else
 379                         on_loaded = off_loaded = "";
 380
 381                 if (streq(u->active_state, "failed")) {
 382                         on_active = ansi_highlight_red(true);
 383                         off_active = ansi_highlight_red(false);
 384                 } else
 385                         on_active = off_active = "";
 386
 387                 e = arg_full ? NULL : ellipsize(u->id, id_len, 33);
 388
 389                 printf("%-*s %s%-6s%s %s%-*s %-*s%s %-*s",
 390                        id_len, e ? e : u->id,
 391                        on_loaded, u->load_state, off_loaded,
 392                        on_active, active_len, u->active_state,
 393                        sub_len, u->sub_state, off_active,
 394                        job_count ? job_len + 1 : 0, u->job_id ? u->job_type : "");
 395                 if (!arg_full && arg_no_pager)
 396                         printf("%.*s\n", desc_len, u->description);
 397                 else
 398                         printf("%s\n", u->description);
 399         }
 400
 401         if (!arg_no_legend) {
 402                 const char *on, *off;
 403
 404                 if (n_shown) {
 405                         printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
 406                                "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
 407                                "SUB    = The low-level unit activation state, values depend on unit type.\n");
 408                         if (job_count)
 409                                 printf("JOB    = Pending job for the unit.\n");
 410                         puts("");
 411                         on = ansi_highlight(true);
 412                         off = ansi_highlight(false);
 413                 } else {
 414                         on = ansi_highlight_red(true);
 415                         off = ansi_highlight_red(false);
 416                 }
 417
 418                 if (arg_all)
 419                         printf("%s%u loaded units listed.%s\n"
 420                                "To show all installed unit files use 'systemctl list-unit-files'.\n",
 421                                on, n_shown, off);
 422                 else
 423                         printf("%s%u loaded units listed.%s Pass --all to see loaded but inactive units, too.\n"
 424                                "To show all installed unit files use 'systemctl list-unit-files'.\n",
 425                                on, n_shown, off);
 426         }
 427 }
 428
 429 static int get_unit_list(DBusConnection *bus, DBusMessage **reply,
 430                          struct unit_info **unit_infos, unsigned *c) {
 431         DBusMessageIter iter, sub;
 432         unsigned n_units = 0;
 433         int r;
 434
 435         assert(bus);
 436         assert(unit_infos);
 437         assert(c);
 438
 439         r = bus_method_call_with_reply(
 440                         bus,
 441                         "org.freedesktop.systemd1",
 442                         "/org/freedesktop/systemd1",
 443                         "org.freedesktop.systemd1.Manager",
 444                         "ListUnits",
 445                         reply,
 446                         NULL,
 447                         DBUS_TYPE_INVALID);
 448         if (r < 0)
 449                 return r;
 450
 451         if (!dbus_message_iter_init(*reply, &iter) ||
 452             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 453             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 454                 log_error("Failed to parse reply.");
 455                 return -EIO;
 456         }
 457
 458         dbus_message_iter_recurse(&iter, &sub);
 459
 460         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 461                 struct unit_info *u;
 462
 463                 if (*c >= n_units) {
 464                         struct unit_info *w;
 465
 466                         n_units = MAX(2 * *c, 16);
 467                         w = realloc(*unit_infos, sizeof(struct unit_info) * n_units);
 468                         if (!w)
 469                                 return log_oom();
 470
 471                         *unit_infos = w;
 472                 }
 473
 474                 u = *unit_infos + *c;
 475
 476                 bus_parse_unit_info(&sub, u);
 477
 478                 dbus_message_iter_next(&sub);
 479                 (*c)++;
 480         }
 481
 482         if (*c > 0)
 483                 qsort(*unit_infos, *c, sizeof(struct unit_info), compare_unit_info);
 484
 485         return 0;
 486 }
 487
 488 static int list_units(DBusConnection *bus, char **args) {
 489         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
 490         _cleanup_free_ struct unit_info *unit_infos = NULL;
 491         unsigned c = 0;
 492         int r;
 493
 494         pager_open_if_enabled();
 495
 496         r = get_unit_list(bus, &reply, &unit_infos, &c);
 497         if (r < 0)
 498                 return r;
 499
 500         if (c > 0)
 501                 output_units_list(unit_infos, c);
 502
 503         return 0;
 504 }
 505
 506 static int compare_unit_file_list(const void *a, const void *b) {
 507         const char *d1, *d2;
 508         const UnitFileList *u = a, *v = b;
 509
 510         d1 = strrchr(u->path, '.');
 511         d2 = strrchr(v->path, '.');
 512
 513         if (d1 && d2) {
 514                 int r;
 515
 516                 r = strcasecmp(d1, d2);
 517                 if (r != 0)
 518                         return r;
 519         }
 520
 521         return strcasecmp(path_get_file_name(u->path), path_get_file_name(v->path));
 522 }
 523
 524 static bool output_show_unit_file(const UnitFileList *u) {
 525         const char *dot;
 526
 527         return !arg_type || ((dot = strrchr(u->path, '.')) && streq(dot+1, arg_type));
 528 }
 529
 530 static void output_unit_file_list(const UnitFileList *units, unsigned c) {
 531         unsigned max_id_len, id_cols, state_cols, n_shown = 0;
 532         const UnitFileList *u;
 533
 534         max_id_len = sizeof("UNIT FILE")-1;
 535         state_cols = sizeof("STATE")-1;
 536         for (u = units; u < units + c; u++) {
 537                 if (!output_show_unit_file(u))
 538                         continue;
 539
 540                 max_id_len = MAX(max_id_len, strlen(path_get_file_name(u->path)));
 541                 state_cols = MAX(state_cols, strlen(unit_file_state_to_string(u->state)));
 542         }
 543
 544         if (!arg_full) {
 545                 unsigned basic_cols;
 546                 id_cols = MIN(max_id_len, 25);
 547                 basic_cols = 1 + id_cols + state_cols;
 548                 if (basic_cols < (unsigned) columns())
 549                         id_cols += MIN(columns() - basic_cols, max_id_len - id_cols);
 550         } else
 551                 id_cols = max_id_len;
 552
 553         if (!arg_no_legend)
 554                 printf("%-*s %-*s\n", id_cols, "UNIT FILE", state_cols, "STATE");
 555
 556         for (u = units; u < units + c; u++) {
 557                 char _cleanup_free_ *e = NULL;
 558                 const char *on, *off;
 559                 const char *id;
 560
 561                 if (!output_show_unit_file(u))
 562                         continue;
 563
 564                 n_shown++;
 565
 566                 if (u->state == UNIT_FILE_MASKED ||
 567                     u->state == UNIT_FILE_MASKED_RUNTIME ||
 568                     u->state == UNIT_FILE_DISABLED ||
 569                     u->state == UNIT_FILE_INVALID) {
 570                         on  = ansi_highlight_red(true);
 571                         off = ansi_highlight_red(false);
 572                 } else if (u->state == UNIT_FILE_ENABLED) {
 573                         on  = ansi_highlight_green(true);
 574                         off = ansi_highlight_green(false);
 575                 } else
 576                         on = off = "";
 577
 578                 id = path_get_file_name(u->path);
 579
 580                 e = arg_full ? NULL : ellipsize(id, id_cols, 33);
 581
 582                 printf("%-*s %s%-*s%s\n",
 583                        id_cols, e ? e : id,
 584                        on, state_cols, unit_file_state_to_string(u->state), off);
 585         }
 586
 587         if (!arg_no_legend)
 588                 printf("\n%u unit files listed.\n", n_shown);
 589 }
 590
 591 static int list_unit_files(DBusConnection *bus, char **args) {
 592         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
 593         _cleanup_free_ UnitFileList *units = NULL;
 594         DBusMessageIter iter, sub, sub2;
 595         unsigned c = 0, n_units = 0;
 596         int r;
 597
 598         pager_open_if_enabled();
 599
 600         if (avoid_bus()) {
 601                 Hashmap *h;
 602                 UnitFileList *u;
 603                 Iterator i;
 604
 605                 h = hashmap_new(string_hash_func, string_compare_func);
 606                 if (!h)
 607                         return log_oom();
 608
 609                 r = unit_file_get_list(arg_scope, arg_root, h);
 610                 if (r < 0) {
 611                         unit_file_list_free(h);
 612                         log_error("Failed to get unit file list: %s", strerror(-r));
 613                         return r;
 614                 }
 615
 616                 n_units = hashmap_size(h);
 617                 units = new(UnitFileList, n_units);
 618                 if (!units) {
 619                         unit_file_list_free(h);
 620                         return log_oom();
 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                 r = bus_method_call_with_reply(
 631                                 bus,
 632                                 "org.freedesktop.systemd1",
 633                                 "/org/freedesktop/systemd1",
 634                                 "org.freedesktop.systemd1.Manager",
 635                                 "ListUnitFiles",
 636                                 &reply,
 637                                 NULL,
 638                                 DBUS_TYPE_INVALID);
 639                 if (r < 0)
 640                         return r;
 641
 642                 if (!dbus_message_iter_init(reply, &iter) ||
 643                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 644                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 645                         log_error("Failed to parse reply.");
 646                         return -EIO;
 647                 }
 648
 649                 dbus_message_iter_recurse(&iter, &sub);
 650
 651                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 652                         UnitFileList *u;
 653                         const char *state;
 654
 655                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT);
 656
 657                         if (c >= n_units) {
 658                                 UnitFileList *w;
 659
 660                                 n_units = MAX(2*c, 16);
 661                                 w = realloc(units, sizeof(struct UnitFileList) * n_units);
 662                                 if (!w)
 663                                         return log_oom();
 664
 665                                 units = w;
 666                         }
 667
 668                         u = units + c;
 669
 670                         dbus_message_iter_recurse(&sub, &sub2);
 671
 672                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->path, true) < 0 ||
 673                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, false) < 0) {
 674                                 log_error("Failed to parse reply.");
 675                                 return -EIO;
 676                         }
 677
 678                         u->state = unit_file_state_from_string(state);
 679
 680                         dbus_message_iter_next(&sub);
 681                         c++;
 682                 }
 683         }
 684
 685         if (c > 0) {
 686                 qsort(units, c, sizeof(UnitFileList), compare_unit_file_list);
 687                 output_unit_file_list(units, c);
 688         }
 689
 690         return 0;
 691 }
 692
 693 static int list_dependencies_print(const char *name, int level, unsigned int branches, bool last) {
 694         int i;
 695         _cleanup_free_ char *n = NULL;
 696         size_t len = 0;
 697         size_t max_len = MAX(columns(),20);
 698
 699         for (i = level - 1; i >= 0; i--) {
 700                 len += 2;
 701                 if(len > max_len - 3 && !arg_full) {
 702                         printf("%s...\n",max_len % 2 ? "" : " ");
 703                         return 0;
 704                 }
 705                 printf("%s", draw_special_char(branches & (1 << i) ? DRAW_TREE_VERT : DRAW_TREE_SPACE));
 706         }
 707         len += 2;
 708         if(len > max_len - 3 && !arg_full) {
 709                 printf("%s...\n",max_len % 2 ? "" : " ");
 710                 return 0;
 711         }
 712         printf("%s", draw_special_char(last ? DRAW_TREE_RIGHT : DRAW_TREE_BRANCH));
 713
 714         if(arg_full){
 715                 printf("%s\n", name);
 716                 return 0;
 717         }
 718
 719         n = ellipsize(name, max_len-len, 100);
 720         if(!n)
 721                 return log_oom();
 722
 723         printf("%s\n", n);
 724         return 0;
 725 }
 726
 727 static int list_dependencies_get_dependencies(DBusConnection *bus, const char *name, char ***deps) {
 728         static const char dependencies[] =
 729                 "Requires\0"
 730                 "RequiresOverridable\0"
 731                 "Requisite\0"
 732                 "RequisiteOverridable\0"
 733                 "Wants\0";
 734
 735         _cleanup_free_ char *path;
 736         const char *interface = "org.freedesktop.systemd1.Unit";
 737
 738         _cleanup_dbus_message_unref_  DBusMessage *reply = NULL;
 739         DBusMessageIter iter, sub, sub2, sub3;
 740
 741         int r = 0;
 742         char **ret = NULL;
 743
 744         assert(bus);
 745         assert(name);
 746         assert(deps);
 747
 748         path = unit_dbus_path_from_name(name);
 749         if (path == NULL) {
 750                 r = -EINVAL;
 751                 goto finish;
 752         }
 753
 754         r = bus_method_call_with_reply(
 755                 bus,
 756                 "org.freedesktop.systemd1",
 757                 path,
 758                 "org.freedesktop.DBus.Properties",
 759                 "GetAll",
 760                 &reply,
 761                 NULL,
 762                 DBUS_TYPE_STRING, &interface,
 763                 DBUS_TYPE_INVALID);
 764         if (r < 0)
 765                 goto finish;
 766
 767         if (!dbus_message_iter_init(reply, &iter) ||
 768                 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 769                 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY) {
 770                 log_error("Failed to parse reply.");
 771                 r = -EIO;
 772                 goto finish;
 773         }
 774
 775         dbus_message_iter_recurse(&iter, &sub);
 776
 777         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 778                 const char *prop;
 779
 780                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_DICT_ENTRY);
 781                 dbus_message_iter_recurse(&sub, &sub2);
 782
 783                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
 784                         log_error("Failed to parse reply.");
 785                         r = -EIO;
 786                         goto finish;
 787                 }
 788
 789                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT) {
 790                         log_error("Failed to parse reply.");
 791                         r = -EIO;
 792                         goto finish;
 793                 }
 794
 795                 dbus_message_iter_recurse(&sub2, &sub3);
 796                 dbus_message_iter_next(&sub);
 797
 798                 if (!nulstr_contains(dependencies, prop))
 799                         continue;
 800
 801                 if (dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_ARRAY) {
 802                         if (dbus_message_iter_get_element_type(&sub3) == DBUS_TYPE_STRING) {
 803                                 DBusMessageIter sub4;
 804                                 dbus_message_iter_recurse(&sub3, &sub4);
 805
 806                                 while (dbus_message_iter_get_arg_type(&sub4) != DBUS_TYPE_INVALID) {
 807                                         const char *s;
 808
 809                                         assert(dbus_message_iter_get_arg_type(&sub4) == DBUS_TYPE_STRING);
 810                                         dbus_message_iter_get_basic(&sub4, &s);
 811
 812                                         r = strv_extend(&ret, s);
 813                                         if (r < 0) {
 814                                                 log_oom();
 815                                                 goto finish;
 816                                         }
 817
 818                                         dbus_message_iter_next(&sub4);
 819                                 }
 820                         }
 821                 }
 822         }
 823 finish:
 824         if (r < 0)
 825                 strv_free(ret);
 826         else
 827                 *deps = ret;
 828         return r;
 829 }
 830
 831 static int list_dependencies_compare(const void *_a, const void *_b) {
 832         const char **a = (const char**) _a, **b = (const char**) _b;
 833         if (unit_name_to_type(*a) == UNIT_TARGET && unit_name_to_type(*b) != UNIT_TARGET)
 834                 return 1;
 835         if (unit_name_to_type(*a) != UNIT_TARGET && unit_name_to_type(*b) == UNIT_TARGET)
 836                 return -1;
 837         return strcasecmp(*a, *b);
 838 }
 839
 840 static int list_dependencies_one(DBusConnection *bus, const char *name, int level, char **units, unsigned int branches) {
 841         char _cleanup_strv_free_ **deps = NULL, **u;
 842         char **c;
 843         int r = 0;
 844
 845         u = strv_append(units, name);
 846         if (!u)
 847                 return log_oom();
 848
 849         r = list_dependencies_get_dependencies(bus, name, &deps);
 850         if (r < 0)
 851                 return r;
 852
 853         qsort(deps, strv_length(deps), sizeof (char*), list_dependencies_compare);
 854
 855         STRV_FOREACH(c, deps) {
 856                 if (strv_contains(u, *c)) {
 857                         r = list_dependencies_print("...", level + 1, (branches << 1) | (c[1] == NULL ? 0 : 1), 1);
 858                         if (r < 0)
 859                                 return r;
 860                         continue;
 861                 }
 862
 863                 r = list_dependencies_print(*c, level, branches, c[1] == NULL);
 864                 if (r < 0)
 865                         return r;
 866
 867                 if (arg_all || unit_name_to_type(*c) == UNIT_TARGET) {
 868                        r = list_dependencies_one(bus, *c, level + 1, u, (branches << 1) | (c[1] == NULL ? 0 : 1));
 869                        if(r < 0)
 870                                return r;
 871                 }
 872         }
 873
 874         return 0;
 875 }
 876
 877 static int list_dependencies(DBusConnection *bus, char **args) {
 878         _cleanup_free_ char *unit = NULL;
 879         const char *u;
 880
 881         assert(bus);
 882
 883         if (args[1]) {
 884                 unit = unit_name_mangle(args[1]);
 885                 if (!unit)
 886                         return log_oom();
 887                 u = unit;
 888         } else
 889                 u = SPECIAL_DEFAULT_TARGET;
 890
 891         pager_open_if_enabled();
 892
 893         puts(u);
 894
 895         return list_dependencies_one(bus, u, 0, NULL, 0);
 896 }
 897
 898 static int list_jobs(DBusConnection *bus, char **args) {
 899         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
 900         DBusMessageIter iter, sub, sub2;
 901         unsigned k = 0;
 902         int r;
 903
 904         pager_open_if_enabled();
 905
 906         r = bus_method_call_with_reply(
 907                         bus,
 908                         "org.freedesktop.systemd1",
 909                         "/org/freedesktop/systemd1",
 910                         "org.freedesktop.systemd1.Manager",
 911                         "ListJobs",
 912                         &reply,
 913                         NULL,
 914                         DBUS_TYPE_INVALID);
 915         if (r < 0)
 916                 return r;
 917
 918         if (!dbus_message_iter_init(reply, &iter) ||
 919             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 920             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 921                 log_error("Failed to parse reply.");
 922                 return -EIO;
 923         }
 924
 925         dbus_message_iter_recurse(&iter, &sub);
 926
 927         if (on_tty())
 928                 printf("%4s %-25s %-15s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
 929
 930         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 931                 const char *name, *type, *state, *job_path, *unit_path;
 932                 uint32_t id;
 933                 char _cleanup_free_ *e = NULL;
 934
 935                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 936                         log_error("Failed to parse reply.");
 937                         return -EIO;
 938                 }
 939
 940                 dbus_message_iter_recurse(&sub, &sub2);
 941
 942                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
 943                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
 944                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
 945                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
 946                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
 947                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
 948                         log_error("Failed to parse reply.");
 949                         return -EIO;
 950                 }
 951
 952                 e = arg_full ? NULL : ellipsize(name, 25, 33);
 953                 printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state);
 954
 955                 k++;
 956
 957                 dbus_message_iter_next(&sub);
 958         }
 959
 960         if (on_tty())
 961                 printf("\n%u jobs listed.\n", k);
 962
 963         return 0;
 964 }
 965
 966 static int load_unit(DBusConnection *bus, char **args) {
 967         char **name;
 968
 969         assert(args);
 970
 971         STRV_FOREACH(name, args+1) {
 972                 _cleanup_free_ char *n = NULL;
 973                 int r;
 974
 975                 n = unit_name_mangle(*name);
 976                 if (!n)
 977                         return log_oom();
 978
 979                 r = bus_method_call_with_reply(
 980                                 bus,
 981                                 "org.freedesktop.systemd1",
 982                                 "/org/freedesktop/systemd1",
 983                                 "org.freedesktop.systemd1.Manager",
 984                                 "LoadUnit",
 985                                 NULL,
 986                                 NULL,
 987                                 DBUS_TYPE_STRING, &n,
 988                                 DBUS_TYPE_INVALID);
 989                 if (r < 0)
 990                         return r;
 991         }
 992
 993         return 0;
 994 }
 995
 996 static int cancel_job(DBusConnection *bus, char **args) {
 997         char **name;
 998
 999         assert(args);
1000
1001         if (strv_length(args) <= 1)
1002                 return daemon_reload(bus, args);
1003
1004         STRV_FOREACH(name, args+1) {
1005                 uint32_t id;
1006                 int r;
1007
1008                 r = safe_atou32(*name, &id);
1009                 if (r < 0) {
1010                         log_error("Failed to parse job id: %s", strerror(-r));
1011                         return r;
1012                 }
1013
1014                 r = bus_method_call_with_reply(
1015                                 bus,
1016                                 "org.freedesktop.systemd1",
1017                                 "/org/freedesktop/systemd1",
1018                                 "org.freedesktop.systemd1.Manager",
1019                                 "CancelJob",
1020                                 NULL,
1021                                 NULL,
1022                                 DBUS_TYPE_UINT32, &id,
1023                                 DBUS_TYPE_INVALID);
1024                 if (r < 0)
1025                         return r;
1026         }
1027
1028         return 0;
1029 }
1030
1031 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
1032         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1033         dbus_bool_t b = FALSE;
1034         DBusMessageIter iter, sub;
1035         const char
1036                 *interface = "org.freedesktop.systemd1.Unit",
1037                 *property = "NeedDaemonReload",
1038                 *path;
1039         _cleanup_free_ char *n = NULL;
1040         int r;
1041
1042         /* We ignore all errors here, since this is used to show a warning only */
1043
1044         n = unit_name_mangle(unit);
1045         if (!n)
1046                 return log_oom();
1047
1048         r = bus_method_call_with_reply (
1049                         bus,
1050                         "org.freedesktop.systemd1",
1051                         "/org/freedesktop/systemd1",
1052                         "org.freedesktop.systemd1.Manager",
1053                         "GetUnit",
1054                         &reply,
1055                         NULL,
1056                         DBUS_TYPE_STRING, &n,
1057                         DBUS_TYPE_INVALID);
1058         if (r < 0)
1059                 return r;
1060
1061         if (!dbus_message_get_args(reply, NULL,
1062                                    DBUS_TYPE_OBJECT_PATH, &path,
1063                                    DBUS_TYPE_INVALID))
1064                 return -EIO;
1065
1066         dbus_message_unref(reply);
1067         reply = NULL;
1068
1069         r = bus_method_call_with_reply(
1070                         bus,
1071                         "org.freedesktop.systemd1",
1072                         path,
1073                         "org.freedesktop.DBus.Properties",
1074                         "Get",
1075                         &reply,
1076                         NULL,
1077                         DBUS_TYPE_STRING, &interface,
1078                         DBUS_TYPE_STRING, &property,
1079                         DBUS_TYPE_INVALID);
1080         if (r < 0)
1081                 return r;
1082
1083         if (!dbus_message_iter_init(reply, &iter) ||
1084             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
1085                 return -EIO;
1086
1087         dbus_message_iter_recurse(&iter, &sub);
1088         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
1089                 return -EIO;
1090
1091         dbus_message_iter_get_basic(&sub, &b);
1092         return b;
1093 }
1094
1095 typedef struct WaitData {
1096         Set *set;
1097
1098         char *name;
1099         char *result;
1100 } WaitData;
1101
1102 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
1103         DBusError _cleanup_dbus_error_free_ error;
1104         WaitData *d = data;
1105
1106         dbus_error_init(&error);
1107
1108         assert(connection);
1109         assert(message);
1110         assert(d);
1111
1112         log_debug("Got D-Bus request: %s.%s() on %s",
1113                   dbus_message_get_interface(message),
1114                   dbus_message_get_member(message),
1115                   dbus_message_get_path(message));
1116
1117         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1118                 log_error("Warning! D-Bus connection terminated.");
1119                 dbus_connection_close(connection);
1120
1121         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1122                 uint32_t id;
1123                 const char *path, *result, *unit;
1124
1125                 if (dbus_message_get_args(message, &error,
1126                                           DBUS_TYPE_UINT32, &id,
1127                                           DBUS_TYPE_OBJECT_PATH, &path,
1128                                           DBUS_TYPE_STRING, &unit,
1129                                           DBUS_TYPE_STRING, &result,
1130                                           DBUS_TYPE_INVALID)) {
1131
1132                         free(set_remove(d->set, (char*) path));
1133
1134                         if (!isempty(result))
1135                                 d->result = strdup(result);
1136
1137                         if (!isempty(unit))
1138                                 d->name = strdup(unit);
1139
1140                         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1141                 }
1142 #ifndef LEGACY
1143                 dbus_error_free(&error);
1144                 if (dbus_message_get_args(message, &error,
1145                                           DBUS_TYPE_UINT32, &id,
1146                                           DBUS_TYPE_OBJECT_PATH, &path,
1147                                           DBUS_TYPE_STRING, &result,
1148                                           DBUS_TYPE_INVALID)) {
1149                         /* Compatibility with older systemd versions <
1150                          * 183 during upgrades. This should be dropped
1151                          * one day. */
1152                         free(set_remove(d->set, (char*) path));
1153
1154                         if (*result)
1155                                 d->result = strdup(result);
1156
1157                         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1158                 }
1159 #endif
1160
1161                 log_error("Failed to parse message: %s", bus_error_message(&error));
1162         }
1163
1164         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1165 }
1166
1167 static int enable_wait_for_jobs(DBusConnection *bus) {
1168         DBusError error;
1169
1170         assert(bus);
1171
1172         if (private_bus)
1173                 return 0;
1174
1175         dbus_error_init(&error);
1176         dbus_bus_add_match(bus,
1177                            "type='signal',"
1178                            "sender='org.freedesktop.systemd1',"
1179                            "interface='org.freedesktop.systemd1.Manager',"
1180                            "member='JobRemoved',"
1181                            "path='/org/freedesktop/systemd1'",
1182                            &error);
1183
1184         if (dbus_error_is_set(&error)) {
1185                 log_error("Failed to add match: %s", bus_error_message(&error));
1186                 dbus_error_free(&error);
1187                 return -EIO;
1188         }
1189
1190         /* This is slightly dirty, since we don't undo the match registrations. */
1191         return 0;
1192 }
1193
1194 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1195         int r = 0;
1196         WaitData d;
1197
1198         assert(bus);
1199         assert(s);
1200
1201         zero(d);
1202         d.set = s;
1203
1204         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL))
1205                 return log_oom();
1206
1207         while (!set_isempty(s)) {
1208
1209                 if (!dbus_connection_read_write_dispatch(bus, -1)) {
1210                         log_error("Disconnected from bus.");
1211                         return -ECONNREFUSED;
1212                 }
1213
1214                 if (!d.result)
1215                         goto free_name;
1216
1217                 if (!arg_quiet) {
1218                         if (streq(d.result, "timeout"))
1219                                 log_error("Job for %s timed out.", strna(d.name));
1220                         else if (streq(d.result, "canceled"))
1221                                 log_error("Job for %s canceled.", strna(d.name));
1222                         else if (streq(d.result, "dependency"))
1223                                 log_error("A dependency job for %s failed. See 'journalctl -xn' for details.", strna(d.name));
1224                         else if (!streq(d.result, "done") && !streq(d.result, "skipped"))
1225                                 log_error("Job for %s failed. See 'systemctl status %s' and 'journalctl -xn' for details.", strna(d.name), strna(d.name));
1226                 }
1227
1228                 if (streq_ptr(d.result, "timeout"))
1229                         r = -ETIME;
1230                 else if (streq_ptr(d.result, "canceled"))
1231                         r = -ECANCELED;
1232                 else if (!streq_ptr(d.result, "done") && !streq_ptr(d.result, "skipped"))
1233                         r = -EIO;
1234
1235                 free(d.result);
1236                 d.result = NULL;
1237
1238         free_name:
1239                 free(d.name);
1240                 d.name = NULL;
1241         }
1242
1243         dbus_connection_remove_filter(bus, wait_filter, &d);
1244         return r;
1245 }
1246
1247 static int check_one_unit(DBusConnection *bus, const char *name, char **check_states, bool quiet) {
1248         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1249         _cleanup_free_ char *n = NULL;
1250         DBusMessageIter iter, sub;
1251         const char
1252                 *interface = "org.freedesktop.systemd1.Unit",
1253                 *property = "ActiveState";
1254         const char *state, *path;
1255         DBusError error;
1256         int r;
1257
1258         assert(name);
1259
1260         dbus_error_init(&error);
1261
1262         n = unit_name_mangle(name);
1263         if (!n)
1264                 return log_oom();
1265
1266         r = bus_method_call_with_reply (
1267                         bus,
1268                         "org.freedesktop.systemd1",
1269                         "/org/freedesktop/systemd1",
1270                         "org.freedesktop.systemd1.Manager",
1271                         "GetUnit",
1272                         &reply,
1273                         &error,
1274                         DBUS_TYPE_STRING, &n,
1275                         DBUS_TYPE_INVALID);
1276         if (r < 0) {
1277                 dbus_error_free(&error);
1278
1279                 if (!quiet)
1280                         puts("unknown");
1281                 return 0;
1282         }
1283
1284         if (!dbus_message_get_args(reply, NULL,
1285                                    DBUS_TYPE_OBJECT_PATH, &path,
1286                                    DBUS_TYPE_INVALID)) {
1287                 log_error("Failed to parse reply.");
1288                 return -EIO;
1289         }
1290
1291         dbus_message_unref(reply);
1292         reply = NULL;
1293
1294         r = bus_method_call_with_reply(
1295                         bus,
1296                         "org.freedesktop.systemd1",
1297                         path,
1298                         "org.freedesktop.DBus.Properties",
1299                         "Get",
1300                         &reply,
1301                         NULL,
1302                         DBUS_TYPE_STRING, &interface,
1303                         DBUS_TYPE_STRING, &property,
1304                         DBUS_TYPE_INVALID);
1305         if (r < 0) {
1306                 if (!quiet)
1307                         puts("unknown");
1308                 return 0;
1309         }
1310
1311         if (!dbus_message_iter_init(reply, &iter) ||
1312             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1313                 log_error("Failed to parse reply.");
1314                 return r;
1315         }
1316
1317         dbus_message_iter_recurse(&iter, &sub);
1318
1319         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1320                 log_error("Failed to parse reply.");
1321                 return r;
1322         }
1323
1324         dbus_message_iter_get_basic(&sub, &state);
1325
1326         if (!quiet)
1327                 puts(state);
1328
1329         return strv_find(check_states, state) ? 1 : 0;
1330 }
1331
1332 static void check_triggering_units(
1333                 DBusConnection *bus,
1334                 const char *unit_name) {
1335
1336         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1337         DBusMessageIter iter, sub;
1338         const char *interface = "org.freedesktop.systemd1.Unit",
1339                    *load_state_property = "LoadState",
1340                    *triggered_by_property = "TriggeredBy",
1341                    *state;
1342         char _cleanup_free_ *unit_path = NULL, *n = NULL;
1343         bool print_warning_label = true;
1344         int r;
1345
1346         n = unit_name_mangle(unit_name);
1347         if (!n) {
1348                 log_oom();
1349                 return;
1350         }
1351
1352         unit_path = unit_dbus_path_from_name(n);
1353         if (!unit_path) {
1354                 log_oom();
1355                 return;
1356         }
1357
1358         r = bus_method_call_with_reply(
1359                         bus,
1360                         "org.freedesktop.systemd1",
1361                         unit_path,
1362                         "org.freedesktop.DBus.Properties",
1363                         "Get",
1364                         &reply,
1365                         NULL,
1366                         DBUS_TYPE_STRING, &interface,
1367                         DBUS_TYPE_STRING, &load_state_property,
1368                         DBUS_TYPE_INVALID);
1369         if (r < 0)
1370                 return;
1371
1372         if (!dbus_message_iter_init(reply, &iter) ||
1373             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
1374                 log_error("Failed to parse reply.");
1375                 return;
1376         }
1377
1378         dbus_message_iter_recurse(&iter, &sub);
1379
1380         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1381             log_error("Failed to parse reply.");
1382             return;
1383         }
1384
1385         dbus_message_iter_get_basic(&sub, &state);
1386
1387         if (streq(state, "masked"))
1388             return;
1389
1390         dbus_message_unref(reply);
1391         reply = NULL;
1392
1393         r = bus_method_call_with_reply(
1394                         bus,
1395                         "org.freedesktop.systemd1",
1396                         unit_path,
1397                         "org.freedesktop.DBus.Properties",
1398                         "Get",
1399                         &reply,
1400                         NULL,
1401                         DBUS_TYPE_STRING, &interface,
1402                         DBUS_TYPE_STRING, &triggered_by_property,
1403                         DBUS_TYPE_INVALID);
1404         if (r < 0)
1405                 return;
1406
1407         if (!dbus_message_iter_init(reply, &iter) ||
1408             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
1409                 log_error("Failed to parse reply.");
1410                 return;
1411         }
1412
1413         dbus_message_iter_recurse(&iter, &sub);
1414         dbus_message_iter_recurse(&sub, &iter);
1415         sub = iter;
1416
1417         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1418                 const char * const check_states[] = {
1419                         "active",
1420                         "reloading",
1421                         NULL
1422                 };
1423                 const char *service_trigger;
1424
1425                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
1426                         log_error("Failed to parse reply.");
1427                         return;
1428                 }
1429
1430                 dbus_message_iter_get_basic(&sub, &service_trigger);
1431
1432                 r = check_one_unit(bus, service_trigger, (char**) check_states, true);
1433                 if (r < 0)
1434                         return;
1435                 if (r > 0) {
1436                         if (print_warning_label) {
1437                                 log_warning("Warning: Stopping %s, but it can still be activated by:", unit_name);
1438                                 print_warning_label = false;
1439                         }
1440
1441                         log_warning("  %s", service_trigger);
1442                 }
1443
1444                 dbus_message_iter_next(&sub);
1445         }
1446 }
1447
1448 static int start_unit_one(
1449                 DBusConnection *bus,
1450                 const char *method,
1451                 const char *name,
1452                 const char *mode,
1453                 DBusError *error,
1454                 Set *s) {
1455
1456         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1457         _cleanup_free_ char *n;
1458         const char *path;
1459         int r;
1460
1461         assert(method);
1462         assert(name);
1463         assert(mode);
1464         assert(error);
1465
1466         n = unit_name_mangle(name);
1467         if (!n)
1468                 return log_oom();
1469
1470         r = bus_method_call_with_reply(
1471                         bus,
1472                         "org.freedesktop.systemd1",
1473                         "/org/freedesktop/systemd1",
1474                         "org.freedesktop.systemd1.Manager",
1475                         method,
1476                         &reply,
1477                         error,
1478                         DBUS_TYPE_STRING, &n,
1479                         DBUS_TYPE_STRING, &mode,
1480                         DBUS_TYPE_INVALID);
1481         if (r) {
1482                 if (r == -ENOENT && arg_action != ACTION_SYSTEMCTL)
1483                         /* There's always a fallback possible for
1484                          * legacy actions. */
1485                         r = -EADDRNOTAVAIL;
1486                 else
1487                         log_error("Failed to issue method call: %s", bus_error_message(error));
1488
1489                 return r;
1490         }
1491
1492         if (!dbus_message_get_args(reply, error,
1493                                    DBUS_TYPE_OBJECT_PATH, &path,
1494                                    DBUS_TYPE_INVALID)) {
1495                 log_error("Failed to parse reply: %s", bus_error_message(error));
1496                 return -EIO;
1497         }
1498
1499         if (need_daemon_reload(bus, n))
1500                 log_warning("Warning: Unit file of %s changed on disk, 'systemctl %s daemon-reload' recommended.",
1501                             n, arg_scope == UNIT_FILE_SYSTEM ? "--system" : "--user");
1502
1503         if (s) {
1504                 char *p;
1505
1506                 p = strdup(path);
1507                 if (!p)
1508                         return log_oom();
1509
1510                 r = set_put(s, p);
1511                 if (r < 0) {
1512                         free(p);
1513                         log_error("Failed to add path to set.");
1514                         return r;
1515                 }
1516         }
1517
1518         return 0;
1519 }
1520
1521 static enum action verb_to_action(const char *verb) {
1522         if (streq(verb, "halt"))
1523                 return ACTION_HALT;
1524         else if (streq(verb, "poweroff"))
1525                 return ACTION_POWEROFF;
1526         else if (streq(verb, "reboot"))
1527                 return ACTION_REBOOT;
1528         else if (streq(verb, "kexec"))
1529                 return ACTION_KEXEC;
1530         else if (streq(verb, "rescue"))
1531                 return ACTION_RESCUE;
1532         else if (streq(verb, "emergency"))
1533                 return ACTION_EMERGENCY;
1534         else if (streq(verb, "default"))
1535                 return ACTION_DEFAULT;
1536         else if (streq(verb, "exit"))
1537                 return ACTION_EXIT;
1538         else if (streq(verb, "suspend"))
1539                 return ACTION_SUSPEND;
1540         else if (streq(verb, "hibernate"))
1541                 return ACTION_HIBERNATE;
1542         else if (streq(verb, "hybrid-sleep"))
1543                 return ACTION_HYBRID_SLEEP;
1544         else
1545                 return ACTION_INVALID;
1546 }
1547
1548 static int start_unit(DBusConnection *bus, char **args) {
1549
1550         static const char * const table[_ACTION_MAX] = {
1551                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1552                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1553                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1554                 [ACTION_KEXEC] = SPECIAL_KEXEC_TARGET,
1555                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1556                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1557                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1558                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1559                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1560                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1561                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET,
1562                 [ACTION_EXIT] = SPECIAL_EXIT_TARGET,
1563                 [ACTION_SUSPEND] = SPECIAL_SUSPEND_TARGET,
1564                 [ACTION_HIBERNATE] = SPECIAL_HIBERNATE_TARGET,
1565                 [ACTION_HYBRID_SLEEP] = SPECIAL_HYBRID_SLEEP_TARGET
1566         };
1567
1568         int r, ret = 0;
1569         const char *method, *mode, *one_name;
1570         Set _cleanup_set_free_free_ *s = NULL;
1571         DBusError _cleanup_dbus_error_free_ error;
1572         char **name;
1573
1574         dbus_error_init(&error);
1575
1576         assert(bus);
1577
1578         ask_password_agent_open_if_enabled();
1579
1580         if (arg_action == ACTION_SYSTEMCTL) {
1581                 method =
1582                         streq(args[0], "stop") ||
1583                         streq(args[0], "condstop")              ? "StopUnit" :
1584                         streq(args[0], "reload")                ? "ReloadUnit" :
1585                         streq(args[0], "restart")               ? "RestartUnit" :
1586
1587                         streq(args[0], "try-restart")           ||
1588                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1589
1590                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1591
1592                         streq(args[0], "reload-or-try-restart") ||
1593                         streq(args[0], "condreload") ||
1594
1595                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1596                                                                   "StartUnit";
1597
1598                 mode =
1599                         (streq(args[0], "isolate") ||
1600                          streq(args[0], "rescue")  ||
1601                          streq(args[0], "emergency")) ? "isolate" : arg_job_mode;
1602
1603                 one_name = table[verb_to_action(args[0])];
1604
1605         } else {
1606                 assert(arg_action < ELEMENTSOF(table));
1607                 assert(table[arg_action]);
1608
1609                 method = "StartUnit";
1610
1611                 mode = (arg_action == ACTION_EMERGENCY ||
1612                         arg_action == ACTION_RESCUE ||
1613                         arg_action == ACTION_RUNLEVEL2 ||
1614                         arg_action == ACTION_RUNLEVEL3 ||
1615                         arg_action == ACTION_RUNLEVEL4 ||
1616                         arg_action == ACTION_RUNLEVEL5) ? "isolate" : "replace";
1617
1618                 one_name = table[arg_action];
1619         }
1620
1621         if (!arg_no_block) {
1622                 ret = enable_wait_for_jobs(bus);
1623                 if (ret < 0) {
1624                         log_error("Could not watch jobs: %s", strerror(-ret));
1625                         return ret;
1626                 }
1627
1628                 s = set_new(string_hash_func, string_compare_func);
1629                 if (!s)
1630                         return log_oom();
1631         }
1632
1633         if (one_name) {
1634                 ret = start_unit_one(bus, method, one_name, mode, &error, s);
1635                 if (ret < 0)
1636                         ret = translate_bus_error_to_exit_status(ret, &error);
1637         } else {
1638                 STRV_FOREACH(name, args+1) {
1639                         r = start_unit_one(bus, method, *name, mode, &error, s);
1640                         if (r < 0) {
1641                                 ret = translate_bus_error_to_exit_status(r, &error);
1642                                 dbus_error_free(&error);
1643                         }
1644                 }
1645         }
1646
1647         if (!arg_no_block) {
1648                 r = wait_for_jobs(bus, s);
1649                 if (r < 0)
1650                         return r;
1651
1652                 /* When stopping units, warn if they can still be triggered by
1653                  * another active unit (socket, path, timer) */
1654                 if (!arg_quiet && streq(method, "StopUnit")) {
1655                         if (one_name)
1656                                 check_triggering_units(bus, one_name);
1657                         else
1658                                 STRV_FOREACH(name, args+1)
1659                                         check_triggering_units(bus, *name);
1660                 }
1661         }
1662
1663         return ret;
1664 }
1665
1666 /* Ask systemd-logind, which might grant access to unprivileged users
1667  * through PolicyKit */
1668 static int reboot_with_logind(DBusConnection *bus, enum action a) {
1669 #ifdef HAVE_LOGIND
1670         const char *method;
1671         dbus_bool_t interactive = true;
1672
1673         if (!bus)
1674                 return -EIO;
1675
1676         polkit_agent_open_if_enabled();
1677
1678         switch (a) {
1679
1680         case ACTION_REBOOT:
1681                 method = "Reboot";
1682                 break;
1683
1684         case ACTION_POWEROFF:
1685                 method = "PowerOff";
1686                 break;
1687
1688         case ACTION_SUSPEND:
1689                 method = "Suspend";
1690                 break;
1691
1692         case ACTION_HIBERNATE:
1693                 method = "Hibernate";
1694                 break;
1695
1696         case ACTION_HYBRID_SLEEP:
1697                 method = "HybridSleep";
1698                 break;
1699
1700         default:
1701                 return -EINVAL;
1702         }
1703
1704         return bus_method_call_with_reply(
1705                         bus,
1706                         "org.freedesktop.login1",
1707                         "/org/freedesktop/login1",
1708                         "org.freedesktop.login1.Manager",
1709                         method,
1710                         NULL,
1711                         NULL,
1712                         DBUS_TYPE_BOOLEAN, &interactive,
1713                         DBUS_TYPE_INVALID);
1714 #else
1715         return -ENOSYS;
1716 #endif
1717 }
1718
1719 static int check_inhibitors(DBusConnection *bus, enum action a) {
1720 #ifdef HAVE_LOGIND
1721         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1722         DBusMessageIter iter, sub, sub2;
1723         int r;
1724         unsigned c = 0;
1725         _cleanup_strv_free_ char **sessions = NULL;
1726         char **s;
1727
1728         if (!bus)
1729                 return 0;
1730
1731         if (arg_ignore_inhibitors || arg_force > 0)
1732                 return 0;
1733
1734         if (arg_when > 0)
1735                 return 0;
1736
1737         if (geteuid() == 0)
1738                 return 0;
1739
1740         if (!on_tty())
1741                 return 0;
1742
1743         r = bus_method_call_with_reply(
1744                         bus,
1745                         "org.freedesktop.login1",
1746                         "/org/freedesktop/login1",
1747                         "org.freedesktop.login1.Manager",
1748                         "ListInhibitors",
1749                         &reply,
1750                         NULL,
1751                         DBUS_TYPE_INVALID);
1752         if (r < 0)
1753                 /* If logind is not around, then there are no inhibitors... */
1754                 return 0;
1755
1756         if (!dbus_message_iter_init(reply, &iter) ||
1757             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1758             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) {
1759                 log_error("Failed to parse reply.");
1760                 return -EIO;
1761         }
1762
1763         dbus_message_iter_recurse(&iter, &sub);
1764         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1765                 const char *what, *who, *why, *mode;
1766                 uint32_t uid, pid;
1767                 _cleanup_strv_free_ char **sv = NULL;
1768                 _cleanup_free_ char *comm = NULL, *user = NULL;
1769
1770                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
1771                         log_error("Failed to parse reply.");
1772                         return -EIO;
1773                 }
1774
1775                 dbus_message_iter_recurse(&sub, &sub2);
1776
1777                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &what, true) < 0 ||
1778                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &who, true) < 0 ||
1779                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &why, true) < 0 ||
1780                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &mode, true) < 0 ||
1781                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &uid, true) < 0 ||
1782                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, false) < 0) {
1783                         log_error("Failed to parse reply.");
1784                         return -EIO;
1785                 }
1786
1787                 if (!streq(mode, "block"))
1788                         goto next;
1789
1790                 sv = strv_split(what, ":");
1791                 if (!sv)
1792                         return log_oom();
1793
1794                 if (!strv_contains(sv,
1795                                   a == ACTION_HALT ||
1796                                   a == ACTION_POWEROFF ||
1797                                   a == ACTION_REBOOT ||
1798                                   a == ACTION_KEXEC ? "shutdown" : "sleep"))
1799                         goto next;
1800
1801                 get_process_comm(pid, &comm);
1802                 user = uid_to_name(uid);
1803                 log_warning("Operation inhibited by \"%s\" (PID %lu \"%s\", user %s), reason is \"%s\".",
1804                             who, (unsigned long) pid, strna(comm), strna(user), why);
1805                 c++;
1806
1807         next:
1808                 dbus_message_iter_next(&sub);
1809         }
1810
1811         dbus_message_iter_recurse(&iter, &sub);
1812
1813         /* Check for current sessions */
1814         sd_get_sessions(&sessions);
1815         STRV_FOREACH(s, sessions) {
1816                 uid_t uid;
1817                 _cleanup_free_ char *type = NULL, *tty = NULL, *seat = NULL, *user = NULL, *service = NULL, *class = NULL;
1818
1819                 if (sd_session_get_uid(*s, &uid) < 0 || uid == getuid())
1820                         continue;
1821
1822                 if (sd_session_get_class(*s, &class) < 0 || !streq(class, "user"))
1823                         continue;
1824
1825                 if (sd_session_get_type(*s, &type) < 0 || (!streq(type, "x11") && !streq(type, "tty")))
1826                         continue;
1827
1828                 sd_session_get_tty(*s, &tty);
1829                 sd_session_get_seat(*s, &seat);
1830                 sd_session_get_service(*s, &service);
1831                 user = uid_to_name(uid);
1832
1833                 log_warning("User %s is logged in on %s.", strna(user), isempty(tty) ? (isempty(seat) ? strna(service) : seat) : tty);
1834                 c++;
1835         }
1836
1837         if (c <= 0)
1838                 return 0;
1839
1840         log_error("Please retry operation after closing inhibitors and logging out other users.\nAlternatively, ignore inhibitors and users with 'systemctl %s -i'.",
1841                   a == ACTION_HALT ? "halt" :
1842                   a == ACTION_POWEROFF ? "poweroff" :
1843                   a == ACTION_REBOOT ? "reboot" :
1844                   a == ACTION_KEXEC ? "kexec" :
1845                   a == ACTION_SUSPEND ? "suspend" :
1846                   a == ACTION_HIBERNATE ? "hibernate" : "hybrid-sleep");
1847
1848         return -EPERM;
1849 #else
1850         return 0;
1851 #endif
1852 }
1853
1854 static int start_special(DBusConnection *bus, char **args) {
1855         enum action a;
1856         int r;
1857
1858         assert(args);
1859
1860         a = verb_to_action(args[0]);
1861
1862         r = check_inhibitors(bus, a);
1863         if (r < 0)
1864                 return r;
1865
1866         if (arg_force >= 2 && geteuid() != 0) {
1867                 log_error("Must be root.");
1868                 return -EPERM;
1869         }
1870
1871         if (arg_force >= 2 &&
1872             (a == ACTION_HALT ||
1873              a == ACTION_POWEROFF ||
1874              a == ACTION_REBOOT))
1875                 halt_now(a);
1876
1877         if (arg_force >= 1 &&
1878             (a == ACTION_HALT ||
1879              a == ACTION_POWEROFF ||
1880              a == ACTION_REBOOT ||
1881              a == ACTION_KEXEC ||
1882              a == ACTION_EXIT))
1883                 return daemon_reload(bus, args);
1884
1885         /* first try logind, to allow authentication with polkit */
1886         if (geteuid() != 0 &&
1887             (a == ACTION_POWEROFF ||
1888              a == ACTION_REBOOT ||
1889              a == ACTION_SUSPEND ||
1890              a == ACTION_HIBERNATE ||
1891              a == ACTION_HYBRID_SLEEP)) {
1892                 r = reboot_with_logind(bus, a);
1893                 if (r >= 0)
1894                         return r;
1895         }
1896
1897         r = start_unit(bus, args);
1898         if (r == EXIT_SUCCESS)
1899                 warn_wall(a);
1900
1901         return r;
1902 }
1903
1904 static int check_unit_active(DBusConnection *bus, char **args) {
1905         const char * const check_states[] = {
1906                 "active",
1907                 "reloading",
1908                 NULL
1909         };
1910
1911         char **name;
1912         int r = 3; /* According to LSB: "program is not running" */
1913
1914         assert(bus);
1915         assert(args);
1916
1917         STRV_FOREACH(name, args+1) {
1918                 int state;
1919
1920                 state = check_one_unit(bus, *name, (char**) check_states, arg_quiet);
1921                 if (state < 0)
1922                         return state;
1923                 if (state > 0)
1924                         r = 0;
1925         }
1926
1927         return r;
1928 }
1929
1930 static int check_unit_failed(DBusConnection *bus, char **args) {
1931         const char * const check_states[] = {
1932                 "failed",
1933                 NULL
1934         };
1935
1936         char **name;
1937         int r = 1;
1938
1939         assert(bus);
1940         assert(args);
1941
1942         STRV_FOREACH(name, args+1) {
1943                 int state;
1944
1945                 state = check_one_unit(bus, *name, (char**) check_states, arg_quiet);
1946                 if (state < 0)
1947                         return state;
1948                 if (state > 0)
1949                         r = 0;
1950         }
1951
1952         return r;
1953 }
1954
1955 static int kill_unit(DBusConnection *bus, char **args) {
1956         char **name;
1957         int r = 0;
1958
1959         assert(bus);
1960         assert(args);
1961
1962         if (!arg_kill_who)
1963                 arg_kill_who = "all";
1964
1965         STRV_FOREACH(name, args+1) {
1966                 _cleanup_free_ char *n = NULL;
1967
1968                 n = unit_name_mangle(*name);
1969                 if (!n)
1970                         return log_oom();
1971
1972                 r = bus_method_call_with_reply(
1973                                 bus,
1974                                 "org.freedesktop.systemd1",
1975                                 "/org/freedesktop/systemd1",
1976                                 "org.freedesktop.systemd1.Manager",
1977                                 "KillUnit",
1978                                 NULL,
1979                                 NULL,
1980                                 DBUS_TYPE_STRING, &n,
1981                                 DBUS_TYPE_STRING, &arg_kill_who,
1982                                 DBUS_TYPE_INT32, &arg_signal,
1983                                 DBUS_TYPE_INVALID);
1984                 if (r < 0)
1985                         return r;
1986         }
1987         return 0;
1988 }
1989
1990 static int set_cgroup(DBusConnection *bus, char **args) {
1991         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
1992         DBusError error;
1993         const char *method;
1994         DBusMessageIter iter;
1995         int r;
1996         _cleanup_free_ char *n = NULL;
1997         const char *runtime;
1998
1999         assert(bus);
2000         assert(args);
2001
2002         dbus_error_init(&error);
2003
2004         method =
2005                 streq(args[0], "set-cgroup")  ? "SetUnitControlGroups" :
2006                 streq(args[0], "unset-group") ? "UnsetUnitControlGroups"
2007                                               : "UnsetUnitControlGroupAttributes";
2008
2009         n = unit_name_mangle(args[1]);
2010         if (!n)
2011                 return log_oom();
2012
2013         m = dbus_message_new_method_call(
2014                         "org.freedesktop.systemd1",
2015                         "/org/freedesktop/systemd1",
2016                         "org.freedesktop.systemd1.Manager",
2017                         method);
2018         if (!m)
2019                 return log_oom();
2020
2021         dbus_message_iter_init_append(m, &iter);
2022         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &n))
2023                 return log_oom();
2024
2025         r = bus_append_strv_iter(&iter, args + 2);
2026         if (r < 0)
2027                 return log_oom();
2028
2029         runtime = arg_runtime ? "runtime" : "persistent";
2030         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &runtime))
2031                 return log_oom();
2032
2033         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
2034         if (!reply) {
2035                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2036                 dbus_error_free(&error);
2037                 return -EIO;
2038         }
2039
2040         return 0;
2041 }
2042
2043 static int set_cgroup_attr(DBusConnection *bus, char **args) {
2044         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
2045         DBusError error;
2046         DBusMessageIter iter, sub, sub2;
2047         char **x, **y;
2048         _cleanup_free_ char *n = NULL;
2049         const char *runtime;
2050
2051         assert(bus);
2052         assert(args);
2053
2054         dbus_error_init(&error);
2055
2056         if (strv_length(args) % 2 != 0) {
2057                 log_error("Expecting an uneven number of arguments!");
2058                 return -EINVAL;
2059         }
2060
2061         n = unit_name_mangle(args[1]);
2062         if (!n)
2063                 return log_oom();
2064
2065         m = dbus_message_new_method_call(
2066                         "org.freedesktop.systemd1",
2067                         "/org/freedesktop/systemd1",
2068                         "org.freedesktop.systemd1.Manager",
2069                         "SetUnitControlGroupAttributes");
2070         if (!m)
2071                 return log_oom();
2072
2073         dbus_message_iter_init_append(m, &iter);
2074         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &n) ||
2075             !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ss)", &sub))
2076                 return log_oom();
2077
2078         STRV_FOREACH_PAIR(x, y, args + 2) {
2079                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2) ||
2080                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, x) ||
2081                     !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, y) ||
2082                     !dbus_message_iter_close_container(&sub, &sub2))
2083                         return log_oom();
2084         }
2085
2086         runtime = arg_runtime ? "runtime" : "persistent";
2087         if (!dbus_message_iter_close_container(&iter, &sub) ||
2088             !dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &runtime))
2089                 return log_oom();
2090
2091         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
2092         if (!reply) {
2093                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2094                 dbus_error_free(&error);
2095                 return -EIO;
2096         }
2097
2098         return 0;
2099 }
2100
2101 static int get_cgroup_attr(DBusConnection *bus, char **args) {
2102         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
2103         DBusError error;
2104         DBusMessageIter iter;
2105         int r;
2106         _cleanup_free_ char *n = NULL;
2107         _cleanup_strv_free_ char **list = NULL;
2108         char **a;
2109
2110         assert(bus);
2111         assert(args);
2112
2113         dbus_error_init(&error);
2114
2115         n = unit_name_mangle(args[1]);
2116         if (!n)
2117                 return log_oom();
2118
2119         m = dbus_message_new_method_call(
2120                         "org.freedesktop.systemd1",
2121                         "/org/freedesktop/systemd1",
2122                         "org.freedesktop.systemd1.Manager",
2123                         "GetUnitControlGroupAttributes");
2124         if (!m)
2125                 return log_oom();
2126
2127         dbus_message_iter_init_append(m, &iter);
2128         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &n))
2129                 return log_oom();
2130
2131         r = bus_append_strv_iter(&iter, args + 2);
2132         if (r < 0)
2133                 return log_oom();
2134
2135         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
2136         if (!reply) {
2137                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2138                 dbus_error_free(&error);
2139                 return -EIO;
2140         }
2141
2142         dbus_message_iter_init(reply, &iter);
2143         r = bus_parse_strv_iter(&iter, &list);
2144         if (r < 0) {
2145                 log_error("Failed to parse value list.");
2146                 return r;
2147         }
2148
2149         STRV_FOREACH(a, list) {
2150                 if (endswith(*a, "\n"))
2151                         fputs(*a, stdout);
2152                 else
2153                         puts(*a);
2154         }
2155
2156         return 0;
2157 }
2158
2159 typedef struct ExecStatusInfo {
2160         char *name;
2161
2162         char *path;
2163         char **argv;
2164
2165         bool ignore;
2166
2167         usec_t start_timestamp;
2168         usec_t exit_timestamp;
2169         pid_t pid;
2170         int code;
2171         int status;
2172
2173         LIST_FIELDS(struct ExecStatusInfo, exec);
2174 } ExecStatusInfo;
2175
2176 static void exec_status_info_free(ExecStatusInfo *i) {
2177         assert(i);
2178
2179         free(i->name);
2180         free(i->path);
2181         strv_free(i->argv);
2182         free(i);
2183 }
2184
2185 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
2186         uint64_t start_timestamp, exit_timestamp, start_timestamp_monotonic, exit_timestamp_monotonic;
2187         DBusMessageIter sub2, sub3;
2188         const char*path;
2189         unsigned n;
2190         uint32_t pid;
2191         int32_t code, status;
2192         dbus_bool_t ignore;
2193
2194         assert(i);
2195         assert(i);
2196
2197         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
2198                 return -EIO;
2199
2200         dbus_message_iter_recurse(sub, &sub2);
2201
2202         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
2203                 return -EIO;
2204
2205         i->path = strdup(path);
2206         if (!i->path)
2207                 return -ENOMEM;
2208
2209         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
2210             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
2211                 return -EIO;
2212
2213         n = 0;
2214         dbus_message_iter_recurse(&sub2, &sub3);
2215         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
2216                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
2217                 dbus_message_iter_next(&sub3);
2218                 n++;
2219         }
2220
2221         i->argv = new0(char*, n+1);
2222         if (!i->argv)
2223                 return -ENOMEM;
2224
2225         n = 0;
2226         dbus_message_iter_recurse(&sub2, &sub3);
2227         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
2228                 const char *s;
2229
2230                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
2231                 dbus_message_iter_get_basic(&sub3, &s);
2232                 dbus_message_iter_next(&sub3);
2233
2234                 i->argv[n] = strdup(s);
2235                 if (!i->argv[n])
2236                         return -ENOMEM;
2237
2238                 n++;
2239         }
2240
2241         if (!dbus_message_iter_next(&sub2) ||
2242             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
2243             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
2244             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp_monotonic, true) < 0 ||
2245             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
2246             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp_monotonic, true) < 0 ||
2247             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
2248             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
2249             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
2250                 return -EIO;
2251
2252         i->ignore = ignore;
2253         i->start_timestamp = (usec_t) start_timestamp;
2254         i->exit_timestamp = (usec_t) exit_timestamp;
2255         i->pid = (pid_t) pid;
2256         i->code = code;
2257         i->status = status;
2258
2259         return 0;
2260 }
2261
2262 typedef struct UnitStatusInfo {
2263         const char *id;
2264         const char *load_state;
2265         const char *active_state;
2266         const char *sub_state;
2267         const char *unit_file_state;
2268
2269         const char *description;
2270         const char *following;
2271
2272         char **documentation;
2273
2274         const char *fragment_path;
2275         const char *source_path;
2276         const char *default_control_group;
2277
2278         const char *load_error;
2279         const char *result;
2280
2281         usec_t inactive_exit_timestamp;
2282         usec_t inactive_exit_timestamp_monotonic;
2283         usec_t active_enter_timestamp;
2284         usec_t active_exit_timestamp;
2285         usec_t inactive_enter_timestamp;
2286
2287         bool need_daemon_reload;
2288
2289         /* Service */
2290         pid_t main_pid;
2291         pid_t control_pid;
2292         const char *status_text;
2293         bool running:1;
2294
2295         usec_t start_timestamp;
2296         usec_t exit_timestamp;
2297
2298         int exit_code, exit_status;
2299
2300         usec_t condition_timestamp;
2301         bool condition_result;
2302
2303         /* Socket */
2304         unsigned n_accepted;
2305         unsigned n_connections;
2306         bool accept;
2307
2308         /* Device */
2309         const char *sysfs_path;
2310
2311         /* Mount, Automount */
2312         const char *where;
2313
2314         /* Swap */
2315         const char *what;
2316
2317         LIST_HEAD(ExecStatusInfo, exec);
2318 } UnitStatusInfo;
2319
2320 static void print_status_info(UnitStatusInfo *i) {
2321         ExecStatusInfo *p;
2322         const char *on, *off, *ss;
2323         usec_t timestamp;
2324         char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
2325         char since2[FORMAT_TIMESTAMP_MAX], *s2;
2326         const char *path;
2327         int flags =
2328                 arg_all * OUTPUT_SHOW_ALL |
2329                 (!on_tty() || pager_have()) * OUTPUT_FULL_WIDTH |
2330                 on_tty() * OUTPUT_COLOR |
2331                 !arg_quiet * OUTPUT_WARN_CUTOFF |
2332                 arg_full * OUTPUT_FULL_WIDTH;
2333
2334         assert(i);
2335
2336         /* This shows pretty information about a unit. See
2337          * print_property() for a low-level property printer */
2338
2339         printf("%s", strna(i->id));
2340
2341         if (i->description && !streq_ptr(i->id, i->description))
2342                 printf(" - %s", i->description);
2343
2344         printf("\n");
2345
2346         if (i->following)
2347                 printf("\t  Follow: unit currently follows state of %s\n", i->following);
2348
2349         if (streq_ptr(i->load_state, "error")) {
2350                 on = ansi_highlight_red(true);
2351                 off = ansi_highlight_red(false);
2352         } else
2353                 on = off = "";
2354
2355         path = i->source_path ? i->source_path : i->fragment_path;
2356
2357         if (i->load_error)
2358                 printf("\t  Loaded: %s%s%s (Reason: %s)\n", on, strna(i->load_state), off, i->load_error);
2359         else if (path && i->unit_file_state)
2360                 printf("\t  Loaded: %s%s%s (%s; %s)\n", on, strna(i->load_state), off, path, i->unit_file_state);
2361         else if (path)
2362                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, path);
2363         else
2364                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
2365
2366         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
2367
2368         if (streq_ptr(i->active_state, "failed")) {
2369                 on = ansi_highlight_red(true);
2370                 off = ansi_highlight_red(false);
2371         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
2372                 on = ansi_highlight_green(true);
2373                 off = ansi_highlight_green(false);
2374         } else
2375                 on = off = "";
2376
2377         if (ss)
2378                 printf("\t  Active: %s%s (%s)%s",
2379                        on,
2380                        strna(i->active_state),
2381                        ss,
2382                        off);
2383         else
2384                 printf("\t  Active: %s%s%s",
2385                        on,
2386                        strna(i->active_state),
2387                        off);
2388
2389         if (!isempty(i->result) && !streq(i->result, "success"))
2390                 printf(" (Result: %s)", i->result);
2391
2392         timestamp = (streq_ptr(i->active_state, "active")      ||
2393                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
2394                     (streq_ptr(i->active_state, "inactive")    ||
2395                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
2396                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
2397                                                                   i->active_exit_timestamp;
2398
2399         s1 = format_timestamp_relative(since1, sizeof(since1), timestamp);
2400         s2 = format_timestamp(since2, sizeof(since2), timestamp);
2401
2402         if (s1)
2403                 printf(" since %s; %s\n", s2, s1);
2404         else if (s2)
2405                 printf(" since %s\n", s2);
2406         else
2407                 printf("\n");
2408
2409         if (!i->condition_result && i->condition_timestamp > 0) {
2410                 s1 = format_timestamp_relative(since1, sizeof(since1), i->condition_timestamp);
2411                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
2412
2413                 if (s1)
2414                         printf("\t          start condition failed at %s; %s\n", s2, s1);
2415                 else if (s2)
2416                         printf("\t          start condition failed at %s\n", s2);
2417         }
2418
2419         if (i->sysfs_path)
2420                 printf("\t  Device: %s\n", i->sysfs_path);
2421         if (i->where)
2422                 printf("\t   Where: %s\n", i->where);
2423         if (i->what)
2424                 printf("\t    What: %s\n", i->what);
2425
2426         if (!strv_isempty(i->documentation)) {
2427                 char **t;
2428                 bool first = true;
2429
2430                 STRV_FOREACH(t, i->documentation) {
2431                         if (first) {
2432                                 printf("\t    Docs: %s\n", *t);
2433                                 first = false;
2434                         } else
2435                                 printf("\t          %s\n", *t);
2436                 }
2437         }
2438
2439         if (i->accept)
2440                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
2441
2442         LIST_FOREACH(exec, p, i->exec) {
2443                 _cleanup_free_ char *t = NULL;
2444                 bool good;
2445
2446                 /* Only show exited processes here */
2447                 if (p->code == 0)
2448                         continue;
2449
2450                 t = strv_join(p->argv, " ");
2451                 printf("\t Process: %u %s=%s ", p->pid, p->name, strna(t));
2452
2453                 good = is_clean_exit_lsb(p->code, p->status, NULL);
2454                 if (!good) {
2455                         on = ansi_highlight_red(true);
2456                         off = ansi_highlight_red(false);
2457                 } else
2458                         on = off = "";
2459
2460                 printf("%s(code=%s, ", on, sigchld_code_to_string(p->code));
2461
2462                 if (p->code == CLD_EXITED) {
2463                         const char *c;
2464
2465                         printf("status=%i", p->status);
2466
2467                         c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD);
2468                         if (c)
2469                                 printf("/%s", c);
2470
2471                 } else
2472                         printf("signal=%s", signal_to_string(p->status));
2473
2474                 printf(")%s\n", off);
2475
2476                 if (i->main_pid == p->pid &&
2477                     i->start_timestamp == p->start_timestamp &&
2478                     i->exit_timestamp == p->start_timestamp)
2479                         /* Let's not show this twice */
2480                         i->main_pid = 0;
2481
2482                 if (p->pid == i->control_pid)
2483                         i->control_pid = 0;
2484         }
2485
2486         if (i->main_pid > 0 || i->control_pid > 0) {
2487                 printf("\t");
2488
2489                 if (i->main_pid > 0) {
2490                         printf("Main PID: %u", (unsigned) i->main_pid);
2491
2492                         if (i->running) {
2493                                 _cleanup_free_ char *t = NULL;
2494                                 get_process_comm(i->main_pid, &t);
2495                                 if (t)
2496                                         printf(" (%s)", t);
2497                         } else if (i->exit_code > 0) {
2498                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
2499
2500                                 if (i->exit_code == CLD_EXITED) {
2501                                         const char *c;
2502
2503                                         printf("status=%i", i->exit_status);
2504
2505                                         c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD);
2506                                         if (c)
2507                                                 printf("/%s", c);
2508
2509                                 } else
2510                                         printf("signal=%s", signal_to_string(i->exit_status));
2511                                 printf(")");
2512                         }
2513                 }
2514
2515                 if (i->main_pid > 0 && i->control_pid > 0)
2516                         printf(";");
2517
2518                 if (i->control_pid > 0) {
2519                         _cleanup_free_ char *t = NULL;
2520
2521                         printf(" Control: %u", (unsigned) i->control_pid);
2522
2523                         get_process_comm(i->control_pid, &t);
2524                         if (t)
2525                                 printf(" (%s)", t);
2526                 }
2527
2528                 printf("\n");
2529         }
2530
2531         if (i->status_text)
2532                 printf("\t  Status: \"%s\"\n", i->status_text);
2533
2534         if (i->default_control_group &&
2535             (i->main_pid > 0 || i->control_pid > 0 || cg_is_empty_by_spec(i->default_control_group, false) == 0)) {
2536                 unsigned c;
2537
2538                 printf("\t  CGroup: %s\n", i->default_control_group);
2539
2540                 if (arg_transport != TRANSPORT_SSH) {
2541                         unsigned k = 0;
2542                         pid_t extra[2];
2543
2544                         c = columns();
2545                         if (c > 18)
2546                                 c -= 18;
2547                         else
2548                                 c = 0;
2549
2550                         if (i->main_pid > 0)
2551                                 extra[k++] = i->main_pid;
2552
2553                         if (i->control_pid > 0)
2554                                 extra[k++] = i->control_pid;
2555
2556                         show_cgroup_and_extra_by_spec(i->default_control_group, "\t\t  ", c, false, extra, k, flags);
2557                 }
2558         }
2559
2560         if (i->id && arg_transport != TRANSPORT_SSH) {
2561                 printf("\n");
2562                 if(arg_scope == UNIT_FILE_SYSTEM)
2563                         show_journal_by_unit(stdout,
2564                                              i->id,
2565                                              arg_output,
2566                                              0,
2567                                              i->inactive_exit_timestamp_monotonic,
2568                                              arg_lines,
2569                                              flags);
2570                 else
2571                         show_journal_by_user_unit(stdout,
2572                                                   i->id,
2573                                                   arg_output,
2574                                                   0,
2575                                                   i->inactive_exit_timestamp_monotonic,
2576                                                   arg_lines,
2577                                                   getuid(),
2578                                                   flags);
2579         }
2580
2581         if (i->need_daemon_reload)
2582                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
2583                        ansi_highlight_red(true),
2584                        ansi_highlight_red(false),
2585                        arg_scope == UNIT_FILE_SYSTEM ? "--system" : "--user");
2586 }
2587
2588 static void show_unit_help(UnitStatusInfo *i) {
2589         char **p;
2590
2591         assert(i);
2592
2593         if (!i->documentation) {
2594                 log_info("Documentation for %s not known.", i->id);
2595                 return;
2596         }
2597
2598         STRV_FOREACH(p, i->documentation) {
2599
2600                 if (startswith(*p, "man:")) {
2601                         size_t k;
2602                         char *e = NULL;
2603                         char _cleanup_free_ *page = NULL, *section = NULL;
2604                         const char *args[4] = { "man", NULL, NULL, NULL };
2605                         pid_t pid;
2606
2607                         k = strlen(*p);
2608
2609                         if ((*p)[k-1] == ')')
2610                                 e = strrchr(*p, '(');
2611
2612                         if (e) {
2613                                 page = strndup((*p) + 4, e - *p - 4);
2614                                 section = strndup(e + 1, *p + k - e - 2);
2615                                 if (!page || !section) {
2616                                         log_oom();
2617                                         return;
2618                                 }
2619
2620                                 args[1] = section;
2621                                 args[2] = page;
2622                         } else
2623                                 args[1] = *p + 4;
2624
2625                         pid = fork();
2626                         if (pid < 0) {
2627                                 log_error("Failed to fork: %m");
2628                                 continue;
2629                         }
2630
2631                         if (pid == 0) {
2632                                 /* Child */
2633                                 execvp(args[0], (char**) args);
2634                                 log_error("Failed to execute man: %m");
2635                                 _exit(EXIT_FAILURE);
2636                         }
2637
2638                         wait_for_terminate(pid, NULL);
2639                 } else
2640                         log_info("Can't show: %s", *p);
2641         }
2642 }
2643
2644 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
2645
2646         assert(name);
2647         assert(iter);
2648         assert(i);
2649
2650         switch (dbus_message_iter_get_arg_type(iter)) {
2651
2652         case DBUS_TYPE_STRING: {
2653                 const char *s;
2654
2655                 dbus_message_iter_get_basic(iter, &s);
2656
2657                 if (!isempty(s)) {
2658                         if (streq(name, "Id"))
2659                                 i->id = s;
2660                         else if (streq(name, "LoadState"))
2661                                 i->load_state = s;
2662                         else if (streq(name, "ActiveState"))
2663                                 i->active_state = s;
2664                         else if (streq(name, "SubState"))
2665                                 i->sub_state = s;
2666                         else if (streq(name, "Description"))
2667                                 i->description = s;
2668                         else if (streq(name, "FragmentPath"))
2669                                 i->fragment_path = s;
2670                         else if (streq(name, "SourcePath"))
2671                                 i->source_path = s;
2672                         else if (streq(name, "DefaultControlGroup"))
2673                                 i->default_control_group = s;
2674                         else if (streq(name, "StatusText"))
2675                                 i->status_text = s;
2676                         else if (streq(name, "SysFSPath"))
2677                                 i->sysfs_path = s;
2678                         else if (streq(name, "Where"))
2679                                 i->where = s;
2680                         else if (streq(name, "What"))
2681                                 i->what = s;
2682                         else if (streq(name, "Following"))
2683                                 i->following = s;
2684                         else if (streq(name, "UnitFileState"))
2685                                 i->unit_file_state = s;
2686                         else if (streq(name, "Result"))
2687                                 i->result = s;
2688                 }
2689
2690                 break;
2691         }
2692
2693         case DBUS_TYPE_BOOLEAN: {
2694                 dbus_bool_t b;
2695
2696                 dbus_message_iter_get_basic(iter, &b);
2697
2698                 if (streq(name, "Accept"))
2699                         i->accept = b;
2700                 else if (streq(name, "NeedDaemonReload"))
2701                         i->need_daemon_reload = b;
2702                 else if (streq(name, "ConditionResult"))
2703                         i->condition_result = b;
2704
2705                 break;
2706         }
2707
2708         case DBUS_TYPE_UINT32: {
2709                 uint32_t u;
2710
2711                 dbus_message_iter_get_basic(iter, &u);
2712
2713                 if (streq(name, "MainPID")) {
2714                         if (u > 0) {
2715                                 i->main_pid = (pid_t) u;
2716                                 i->running = true;
2717                         }
2718                 } else if (streq(name, "ControlPID"))
2719                         i->control_pid = (pid_t) u;
2720                 else if (streq(name, "ExecMainPID")) {
2721                         if (u > 0)
2722                                 i->main_pid = (pid_t) u;
2723                 } else if (streq(name, "NAccepted"))
2724                         i->n_accepted = u;
2725                 else if (streq(name, "NConnections"))
2726                         i->n_connections = u;
2727
2728                 break;
2729         }
2730
2731         case DBUS_TYPE_INT32: {
2732                 int32_t j;
2733
2734                 dbus_message_iter_get_basic(iter, &j);
2735
2736                 if (streq(name, "ExecMainCode"))
2737                         i->exit_code = (int) j;
2738                 else if (streq(name, "ExecMainStatus"))
2739                         i->exit_status = (int) j;
2740
2741                 break;
2742         }
2743
2744         case DBUS_TYPE_UINT64: {
2745                 uint64_t u;
2746
2747                 dbus_message_iter_get_basic(iter, &u);
2748
2749                 if (streq(name, "ExecMainStartTimestamp"))
2750                         i->start_timestamp = (usec_t) u;
2751                 else if (streq(name, "ExecMainExitTimestamp"))
2752                         i->exit_timestamp = (usec_t) u;
2753                 else if (streq(name, "ActiveEnterTimestamp"))
2754                         i->active_enter_timestamp = (usec_t) u;
2755                 else if (streq(name, "InactiveEnterTimestamp"))
2756                         i->inactive_enter_timestamp = (usec_t) u;
2757                 else if (streq(name, "InactiveExitTimestamp"))
2758                         i->inactive_exit_timestamp = (usec_t) u;
2759                 else if (streq(name, "InactiveExitTimestampMonotonic"))
2760                         i->inactive_exit_timestamp_monotonic = (usec_t) u;
2761                 else if (streq(name, "ActiveExitTimestamp"))
2762                         i->active_exit_timestamp = (usec_t) u;
2763                 else if (streq(name, "ConditionTimestamp"))
2764                         i->condition_timestamp = (usec_t) u;
2765
2766                 break;
2767         }
2768
2769         case DBUS_TYPE_ARRAY: {
2770
2771                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
2772                     startswith(name, "Exec")) {
2773                         DBusMessageIter sub;
2774
2775                         dbus_message_iter_recurse(iter, &sub);
2776                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2777                                 ExecStatusInfo *info;
2778                                 int r;
2779
2780                                 if (!(info = new0(ExecStatusInfo, 1)))
2781                                         return -ENOMEM;
2782
2783                                 if (!(info->name = strdup(name))) {
2784                                         free(info);
2785                                         return -ENOMEM;
2786                                 }
2787
2788                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
2789                                         free(info);
2790                                         return r;
2791                                 }
2792
2793                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
2794
2795                                 dbus_message_iter_next(&sub);
2796                         }
2797                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING &&
2798                            streq(name, "Documentation")) {
2799
2800                         DBusMessageIter sub;
2801
2802                         dbus_message_iter_recurse(iter, &sub);
2803                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING) {
2804                                 const char *s;
2805                                 char **l;
2806
2807                                 dbus_message_iter_get_basic(&sub, &s);
2808
2809                                 l = strv_append(i->documentation, s);
2810                                 if (!l)
2811                                         return -ENOMEM;
2812
2813                                 strv_free(i->documentation);
2814                                 i->documentation = l;
2815
2816                                 dbus_message_iter_next(&sub);
2817                         }
2818                 }
2819
2820                 break;
2821         }
2822
2823         case DBUS_TYPE_STRUCT: {
2824
2825                 if (streq(name, "LoadError")) {
2826                         DBusMessageIter sub;
2827                         const char *n, *message;
2828                         int r;
2829
2830                         dbus_message_iter_recurse(iter, &sub);
2831
2832                         r = bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &n, true);
2833                         if (r < 0)
2834                                 return r;
2835
2836                         r = bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &message, false);
2837                         if (r < 0)
2838                                 return r;
2839
2840                         if (!isempty(message))
2841                                 i->load_error = message;
2842                 }
2843
2844                 break;
2845         }
2846         }
2847
2848         return 0;
2849 }
2850
2851 static int print_property(const char *name, DBusMessageIter *iter) {
2852         assert(name);
2853         assert(iter);
2854
2855         /* This is a low-level property printer, see
2856          * print_status_info() for the nicer output */
2857
2858         if (arg_property && !strv_find(arg_property, name))
2859                 return 0;
2860
2861         switch (dbus_message_iter_get_arg_type(iter)) {
2862
2863         case DBUS_TYPE_STRUCT: {
2864                 DBusMessageIter sub;
2865                 dbus_message_iter_recurse(iter, &sub);
2866
2867                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2868                         uint32_t u;
2869
2870                         dbus_message_iter_get_basic(&sub, &u);
2871
2872                         if (u)
2873                                 printf("%s=%u\n", name, (unsigned) u);
2874                         else if (arg_all)
2875                                 printf("%s=\n", name);
2876
2877                         return 0;
2878                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2879                         const char *s;
2880
2881                         dbus_message_iter_get_basic(&sub, &s);
2882
2883                         if (arg_all || s[0])
2884                                 printf("%s=%s\n", name, s);
2885
2886                         return 0;
2887                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "LoadError")) {
2888                         const char *a = NULL, *b = NULL;
2889
2890                         if (bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &a, true) >= 0)
2891                                 bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &b, false);
2892
2893                         if (arg_all || !isempty(a) || !isempty(b))
2894                                 printf("%s=%s \"%s\"\n", name, strempty(a), strempty(b));
2895
2896                         return 0;
2897                 }
2898
2899                 break;
2900         }
2901
2902         case DBUS_TYPE_ARRAY:
2903
2904                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
2905                         DBusMessageIter sub, sub2;
2906
2907                         dbus_message_iter_recurse(iter, &sub);
2908                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2909                                 const char *path;
2910                                 dbus_bool_t ignore;
2911
2912                                 dbus_message_iter_recurse(&sub, &sub2);
2913
2914                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
2915                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
2916                                         printf("EnvironmentFile=%s (ignore_errors=%s)\n", path, yes_no(ignore));
2917
2918                                 dbus_message_iter_next(&sub);
2919                         }
2920
2921                         return 0;
2922
2923                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2924                         DBusMessageIter sub, sub2;
2925
2926                         dbus_message_iter_recurse(iter, &sub);
2927                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2928                                 const char *type, *path;
2929
2930                                 dbus_message_iter_recurse(&sub, &sub2);
2931
2932                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2933                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2934                                         printf("%s=%s\n", type, path);
2935
2936                                 dbus_message_iter_next(&sub);
2937                         }
2938
2939                         return 0;
2940
2941                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2942                         DBusMessageIter sub, sub2;
2943
2944                         dbus_message_iter_recurse(iter, &sub);
2945                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2946                                 const char *base;
2947                                 uint64_t value, next_elapse;
2948
2949                                 dbus_message_iter_recurse(&sub, &sub2);
2950
2951                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2952                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2953                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2954                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2955
2956                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2957                                                base,
2958                                                format_timespan(timespan1, sizeof(timespan1), value),
2959                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2960                                 }
2961
2962                                 dbus_message_iter_next(&sub);
2963                         }
2964
2965                         return 0;
2966
2967                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "ControlGroupAttributes")) {
2968                         DBusMessageIter sub, sub2;
2969
2970                         dbus_message_iter_recurse(iter, &sub);
2971                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2972                                 const char *controller, *attr, *value;
2973
2974                                 dbus_message_iter_recurse(&sub, &sub2);
2975
2976                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &controller, true) >= 0 &&
2977                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &attr, true) >= 0 &&
2978                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &value, false) >= 0) {
2979
2980                                         printf("ControlGroupAttributes={ controller=%s ; attribute=%s ; value=\"%s\" }\n",
2981                                                controller,
2982                                                attr,
2983                                                value);
2984                                 }
2985
2986                                 dbus_message_iter_next(&sub);
2987                         }
2988
2989                         return 0;
2990
2991                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2992                         DBusMessageIter sub;
2993
2994                         dbus_message_iter_recurse(iter, &sub);
2995                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2996                                 ExecStatusInfo info;
2997
2998                                 zero(info);
2999                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
3000                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
3001                                         char _cleanup_free_ *t;
3002
3003                                         t = strv_join(info.argv, " ");
3004
3005                                         printf("%s={ path=%s ; argv[]=%s ; ignore_errors=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
3006                                                name,
3007                                                strna(info.path),
3008                                                strna(t),
3009                                                yes_no(info.ignore),
3010                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
3011                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
3012                                                (unsigned) info. pid,
3013                                                sigchld_code_to_string(info.code),
3014                                                info.status,
3015                                                info.code == CLD_EXITED ? "" : "/",
3016                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
3017                                 }
3018
3019                                 free(info.path);
3020                                 strv_free(info.argv);
3021
3022                                 dbus_message_iter_next(&sub);
3023                         }
3024
3025                         return 0;
3026                 }
3027
3028                 break;
3029         }
3030
3031         if (generic_print_property(name, iter, arg_all) > 0)
3032                 return 0;
3033
3034         if (arg_all)
3035                 printf("%s=[unprintable]\n", name);
3036
3037         return 0;
3038 }
3039
3040 static int show_one(const char *verb, DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
3041         _cleanup_free_ DBusMessage *reply = NULL;
3042         const char *interface = "";
3043         int r;
3044         DBusMessageIter iter, sub, sub2, sub3;
3045         UnitStatusInfo info;
3046         ExecStatusInfo *p;
3047
3048         assert(path);
3049         assert(new_line);
3050
3051         zero(info);
3052
3053         r = bus_method_call_with_reply(
3054                         bus,
3055                         "org.freedesktop.systemd1",
3056                         path,
3057                         "org.freedesktop.DBus.Properties",
3058                         "GetAll",
3059                         &reply,
3060                         NULL,
3061                         DBUS_TYPE_STRING, &interface,
3062                         DBUS_TYPE_INVALID);
3063         if (r < 0)
3064                 return r;
3065
3066         if (!dbus_message_iter_init(reply, &iter) ||
3067             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
3068             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
3069                 log_error("Failed to parse reply.");
3070                 return -EIO;
3071         }
3072
3073         dbus_message_iter_recurse(&iter, &sub);
3074
3075         if (*new_line)
3076                 printf("\n");
3077
3078         *new_line = true;
3079
3080         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
3081                 const char *name;
3082
3083                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_DICT_ENTRY);
3084                 dbus_message_iter_recurse(&sub, &sub2);
3085
3086                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
3087                     dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT) {
3088                         log_error("Failed to parse reply.");
3089                         return -EIO;
3090                 }
3091
3092                 dbus_message_iter_recurse(&sub2, &sub3);
3093
3094                 if (show_properties)
3095                         r = print_property(name, &sub3);
3096                 else
3097                         r = status_property(name, &sub3, &info);
3098                 if (r < 0) {
3099                         log_error("Failed to parse reply.");
3100                         return -EIO;
3101                 }
3102
3103                 dbus_message_iter_next(&sub);
3104         }
3105
3106         r = 0;
3107
3108         if (!show_properties) {
3109                 if (streq(verb, "help"))
3110                         show_unit_help(&info);
3111                 else
3112                         print_status_info(&info);
3113         }
3114
3115         strv_free(info.documentation);
3116
3117         if (!streq_ptr(info.active_state, "active") &&
3118             !streq_ptr(info.active_state, "reloading") &&
3119             streq(verb, "status"))
3120                 /* According to LSB: "program not running" */
3121                 r = 3;
3122
3123         while ((p = info.exec)) {
3124                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
3125                 exec_status_info_free(p);
3126         }
3127
3128         return r;
3129 }
3130
3131 static int show_one_by_pid(const char *verb, DBusConnection *bus, uint32_t pid, bool *new_line) {
3132         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3133         const char *path = NULL;
3134         DBusError _cleanup_dbus_error_free_ error;
3135         int r;
3136
3137         dbus_error_init(&error);
3138
3139         r = bus_method_call_with_reply(
3140                         bus,
3141                         "org.freedesktop.systemd1",
3142                         "/org/freedesktop/systemd1",
3143                         "org.freedesktop.systemd1.Manager",
3144                         "GetUnitByPID",
3145                         &reply,
3146                         NULL,
3147                         DBUS_TYPE_UINT32, &pid,
3148                         DBUS_TYPE_INVALID);
3149         if (r < 0)
3150                 return r;
3151
3152         if (!dbus_message_get_args(reply, &error,
3153                                    DBUS_TYPE_OBJECT_PATH, &path,
3154                                    DBUS_TYPE_INVALID)) {
3155                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3156                 return -EIO;
3157         }
3158
3159         r = show_one(verb, bus, path, false, new_line);
3160         return r;
3161 }
3162
3163 static int show_all(const char* verb, DBusConnection *bus, bool show_properties, bool *new_line) {
3164         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3165         _cleanup_free_ struct unit_info *unit_infos = NULL;
3166         unsigned c = 0;
3167         const struct unit_info *u;
3168         int r;
3169
3170         r = get_unit_list(bus, &reply, &unit_infos, &c);
3171         if (r < 0)
3172                 return r;
3173
3174         for (u = unit_infos; u < unit_infos + c; u++) {
3175                 char _cleanup_free_ *p = NULL;
3176
3177                 if (!output_show_unit(u))
3178                         continue;
3179
3180                 p = unit_dbus_path_from_name(u->id);
3181                 if (!p)
3182                         return log_oom();
3183
3184                 printf("%s -> '%s'\n", u->id, p);
3185
3186                 r = show_one(verb, bus, p, show_properties, new_line);
3187                 if (r != 0)
3188                         return r;
3189         }
3190
3191         return 0;
3192 }
3193
3194 static int show(DBusConnection *bus, char **args) {
3195         int r, ret = 0;
3196         bool show_properties, show_status, new_line = false;
3197         char **name;
3198
3199         assert(bus);
3200         assert(args);
3201
3202         show_properties = streq(args[0], "show");
3203         show_status = streq(args[0], "status");
3204
3205         if (show_properties)
3206                 pager_open_if_enabled();
3207
3208         /* If no argument is specified inspect the manager itself */
3209
3210         if (show_properties && strv_length(args) <= 1)
3211                 return show_one(args[0], bus, "/org/freedesktop/systemd1", show_properties, &new_line);
3212
3213         if (show_status && strv_length(args) <= 1)
3214                 return show_all(args[0], bus, false, &new_line);
3215
3216         STRV_FOREACH(name, args+1) {
3217                 uint32_t id;
3218
3219                 if (safe_atou32(*name, &id) < 0) {
3220                         _cleanup_free_ char *p = NULL, *n = NULL;
3221                         /* Interpret as unit name */
3222
3223                         n = unit_name_mangle(*name);
3224                         if (!n)
3225                                 return log_oom();
3226
3227                         p = unit_dbus_path_from_name(n);
3228                         if (!p)
3229                                 return log_oom();
3230
3231                         r = show_one(args[0], bus, p, show_properties, &new_line);
3232                         if (r != 0)
3233                                 ret = r;
3234
3235                 } else if (show_properties) {
3236                         _cleanup_free_ char *p = NULL;
3237
3238                         /* Interpret as job id */
3239                         if (asprintf(&p, "/org/freedesktop/systemd1/job/%u", id) < 0)
3240                                 return log_oom();
3241
3242                         r = show_one(args[0], bus, p, show_properties, &new_line);
3243                         if (r != 0)
3244                                 ret = r;
3245
3246                 } else {
3247                         /* Interpret as PID */
3248                         r = show_one_by_pid(args[0], bus, id, &new_line);
3249                         if (r != 0)
3250                                 ret = r;
3251                 }
3252         }
3253
3254         return ret;
3255 }
3256
3257 static int dump(DBusConnection *bus, char **args) {
3258         _cleanup_free_ DBusMessage *reply = NULL;
3259         DBusError error;
3260         int r;
3261         const char *text;
3262
3263         dbus_error_init(&error);
3264
3265         pager_open_if_enabled();
3266
3267         r = bus_method_call_with_reply(
3268                         bus,
3269                         "org.freedesktop.systemd1",
3270                         "/org/freedesktop/systemd1",
3271                         "org.freedesktop.systemd1.Manager",
3272                         "Dump",
3273                         &reply,
3274                         NULL,
3275                         DBUS_TYPE_INVALID);
3276         if (r < 0)
3277                 return r;
3278
3279         if (!dbus_message_get_args(reply, &error,
3280                                    DBUS_TYPE_STRING, &text,
3281                                    DBUS_TYPE_INVALID)) {
3282                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3283                 dbus_error_free(&error);
3284                 return  -EIO;
3285         }
3286
3287         fputs(text, stdout);
3288         return 0;
3289 }
3290
3291 static int snapshot(DBusConnection *bus, char **args) {
3292         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3293         DBusError error;
3294         int r;
3295         dbus_bool_t cleanup = FALSE;
3296         DBusMessageIter iter, sub;
3297         const char
3298                 *path, *id,
3299                 *interface = "org.freedesktop.systemd1.Unit",
3300                 *property = "Id";
3301         _cleanup_free_ char *n = NULL;
3302
3303         dbus_error_init(&error);
3304
3305         if (strv_length(args) > 1)
3306                 n = snapshot_name_mangle(args[1]);
3307         else
3308                 n = strdup("");
3309         if (!n)
3310                 return log_oom();
3311
3312         r = bus_method_call_with_reply (
3313                         bus,
3314                         "org.freedesktop.systemd1",
3315                         "/org/freedesktop/systemd1",
3316                         "org.freedesktop.systemd1.Manager",
3317                         "CreateSnapshot",
3318                         &reply,
3319                         NULL,
3320                         DBUS_TYPE_STRING, &n,
3321                         DBUS_TYPE_BOOLEAN, &cleanup,
3322                         DBUS_TYPE_INVALID);
3323         if (r < 0)
3324                 return r;
3325
3326         if (!dbus_message_get_args(reply, &error,
3327                                    DBUS_TYPE_OBJECT_PATH, &path,
3328                                    DBUS_TYPE_INVALID)) {
3329                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3330                 dbus_error_free(&error);
3331                 return -EIO;
3332         }
3333
3334         dbus_message_unref(reply);
3335         reply = NULL;
3336
3337         r = bus_method_call_with_reply (
3338                         bus,
3339                         "org.freedesktop.systemd1",
3340                         path,
3341                         "org.freedesktop.DBus.Properties",
3342                         "Get",
3343                         &reply,
3344                         NULL,
3345                         DBUS_TYPE_STRING, &interface,
3346                         DBUS_TYPE_STRING, &property,
3347                         DBUS_TYPE_INVALID);
3348         if (r < 0)
3349                 return r;
3350
3351         if (!dbus_message_iter_init(reply, &iter) ||
3352             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3353                 log_error("Failed to parse reply.");
3354                 return -EIO;
3355         }
3356
3357         dbus_message_iter_recurse(&iter, &sub);
3358
3359         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
3360                 log_error("Failed to parse reply.");
3361                 return -EIO;
3362         }
3363
3364         dbus_message_iter_get_basic(&sub, &id);
3365
3366         if (!arg_quiet)
3367                 puts(id);
3368
3369         return 0;
3370 }
3371
3372 static int delete_snapshot(DBusConnection *bus, char **args) {
3373         char **name;
3374
3375         assert(args);
3376
3377         STRV_FOREACH(name, args+1) {
3378                 _cleanup_free_ char *n = NULL;
3379                 int r;
3380
3381                 n = snapshot_name_mangle(*name);
3382                 if (!n)
3383                         return log_oom();
3384
3385                 r = bus_method_call_with_reply(
3386                                 bus,
3387                                 "org.freedesktop.systemd1",
3388                                 "/org/freedesktop/systemd1",
3389                                 "org.freedesktop.systemd1.Manager",
3390                                 "RemoveSnapshot",
3391                                 NULL,
3392                                 NULL,
3393                                 DBUS_TYPE_STRING, &n,
3394                                 DBUS_TYPE_INVALID);
3395                 if (r < 0)
3396                         return r;
3397         }
3398
3399         return 0;
3400 }
3401
3402 static int daemon_reload(DBusConnection *bus, char **args) {
3403         int r;
3404         const char *method;
3405         DBusError error;
3406
3407         if (arg_action == ACTION_RELOAD)
3408                 method = "Reload";
3409         else if (arg_action == ACTION_REEXEC)
3410                 method = "Reexecute";
3411         else {
3412                 assert(arg_action == ACTION_SYSTEMCTL);
3413
3414                 method =
3415                         streq(args[0], "clear-jobs")    ||
3416                         streq(args[0], "cancel")        ? "ClearJobs" :
3417                         streq(args[0], "daemon-reexec") ? "Reexecute" :
3418                         streq(args[0], "reset-failed")  ? "ResetFailed" :
3419                         streq(args[0], "halt")          ? "Halt" :
3420                         streq(args[0], "poweroff")      ? "PowerOff" :
3421                         streq(args[0], "reboot")        ? "Reboot" :
3422                         streq(args[0], "kexec")         ? "KExec" :
3423                         streq(args[0], "exit")          ? "Exit" :
3424                                     /* "daemon-reload" */ "Reload";
3425         }
3426
3427         r = bus_method_call_with_reply(
3428                         bus,
3429                         "org.freedesktop.systemd1",
3430                         "/org/freedesktop/systemd1",
3431                         "org.freedesktop.systemd1.Manager",
3432                         method,
3433                         NULL,
3434                         &error,
3435                         DBUS_TYPE_INVALID);
3436
3437         if (r == -ENOENT && arg_action != ACTION_SYSTEMCTL)
3438                 /* There's always a fallback possible for
3439                  * legacy actions. */
3440                 r = -EADDRNOTAVAIL;
3441         else if (r == -ETIMEDOUT && streq(method, "Reexecute"))
3442                 /* On reexecution, we expect a disconnect, not
3443                  * a reply */
3444                 r = 0;
3445         else if (r < 0)
3446                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3447
3448         dbus_error_free(&error);
3449         return r;
3450 }
3451
3452 static int reset_failed(DBusConnection *bus, char **args) {
3453         int r = 0;
3454         char **name;
3455
3456         if (strv_length(args) <= 1)
3457                 return daemon_reload(bus, args);
3458
3459         STRV_FOREACH(name, args+1) {
3460                 _cleanup_free_ char *n;
3461
3462                 n = unit_name_mangle(*name);
3463                 if (!n)
3464                         return log_oom();
3465
3466                 r = bus_method_call_with_reply(
3467                                 bus,
3468                                 "org.freedesktop.systemd1",
3469                                 "/org/freedesktop/systemd1",
3470                                 "org.freedesktop.systemd1.Manager",
3471                                 "ResetFailedUnit",
3472                                 NULL,
3473                                 NULL,
3474                                 DBUS_TYPE_STRING, &n,
3475                                 DBUS_TYPE_INVALID);
3476                 if (r < 0)
3477                         return r;
3478         }
3479
3480         return 0;
3481 }
3482
3483 static int show_enviroment(DBusConnection *bus, char **args) {
3484         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3485         DBusMessageIter iter, sub, sub2;
3486         int r;
3487         const char
3488                 *interface = "org.freedesktop.systemd1.Manager",
3489                 *property = "Environment";
3490
3491         pager_open_if_enabled();
3492
3493         r = bus_method_call_with_reply(
3494                         bus,
3495                         "org.freedesktop.systemd1",
3496                         "/org/freedesktop/systemd1",
3497                         "org.freedesktop.DBus.Properties",
3498                         "Get",
3499                         &reply,
3500                         NULL,
3501                         DBUS_TYPE_STRING, &interface,
3502                         DBUS_TYPE_STRING, &property,
3503                         DBUS_TYPE_INVALID);
3504         if (r < 0)
3505                 return r;
3506
3507         if (!dbus_message_iter_init(reply, &iter) ||
3508             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3509                 log_error("Failed to parse reply.");
3510                 return -EIO;
3511         }
3512
3513         dbus_message_iter_recurse(&iter, &sub);
3514
3515         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
3516             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
3517                 log_error("Failed to parse reply.");
3518                 return -EIO;
3519         }
3520
3521         dbus_message_iter_recurse(&sub, &sub2);
3522
3523         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
3524                 const char *text;
3525
3526                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
3527                         log_error("Failed to parse reply.");
3528                         return -EIO;
3529                 }
3530
3531                 dbus_message_iter_get_basic(&sub2, &text);
3532                 puts(text);
3533
3534                 dbus_message_iter_next(&sub2);
3535         }
3536
3537         return 0;
3538 }
3539
3540 static int switch_root(DBusConnection *bus, char **args) {
3541         unsigned l;
3542         const char *root;
3543         _cleanup_free_ char *init = NULL;
3544
3545         l = strv_length(args);
3546         if (l < 2 || l > 3) {
3547                 log_error("Wrong number of arguments.");
3548                 return -EINVAL;
3549         }
3550
3551         root = args[1];
3552
3553         if (l >= 3)
3554                 init = strdup(args[2]);
3555         else {
3556                 parse_env_file("/proc/cmdline", WHITESPACE,
3557                                "init", &init,
3558                                NULL);
3559
3560                 if (!init)
3561                         init = strdup("");
3562         }
3563         if (!init)
3564                 return log_oom();
3565
3566         log_debug("switching root - root: %s; init: %s", root, init);
3567
3568         return bus_method_call_with_reply(
3569                         bus,
3570                         "org.freedesktop.systemd1",
3571                         "/org/freedesktop/systemd1",
3572                         "org.freedesktop.systemd1.Manager",
3573                         "SwitchRoot",
3574                         NULL,
3575                         NULL,
3576                         DBUS_TYPE_STRING, &root,
3577                         DBUS_TYPE_STRING, &init,
3578                         DBUS_TYPE_INVALID);
3579 }
3580
3581 static int set_environment(DBusConnection *bus, char **args) {
3582         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
3583         DBusError error;
3584         const char *method;
3585         DBusMessageIter iter;
3586         int r;
3587
3588         assert(bus);
3589         assert(args);
3590
3591         dbus_error_init(&error);
3592
3593         method = streq(args[0], "set-environment")
3594                 ? "SetEnvironment"
3595                 : "UnsetEnvironment";
3596
3597         m = dbus_message_new_method_call(
3598                         "org.freedesktop.systemd1",
3599                         "/org/freedesktop/systemd1",
3600                         "org.freedesktop.systemd1.Manager",
3601                         method);
3602         if (!m)
3603                 return log_oom();
3604
3605         dbus_message_iter_init_append(m, &iter);
3606
3607         r = bus_append_strv_iter(&iter, args + 1);
3608         if (r < 0)
3609                 return log_oom();
3610
3611         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
3612         if (!reply) {
3613                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3614                 dbus_error_free(&error);
3615                 return -EIO;
3616         }
3617
3618         return 0;
3619 }
3620
3621 static int enable_sysv_units(char **args) {
3622         int r = 0;
3623
3624 #if defined(HAVE_SYSV_COMPAT) && defined(HAVE_CHKCONFIG)
3625         const char *verb = args[0];
3626         unsigned f = 1, t = 1;
3627         LookupPaths paths;
3628
3629         if (arg_scope != UNIT_FILE_SYSTEM)
3630                 return 0;
3631
3632         if (!streq(verb, "enable") &&
3633             !streq(verb, "disable") &&
3634             !streq(verb, "is-enabled"))
3635                 return 0;
3636
3637         /* Processes all SysV units, and reshuffles the array so that
3638          * afterwards only the native units remain */
3639
3640         zero(paths);
3641         r = lookup_paths_init(&paths, SYSTEMD_SYSTEM, false, NULL, NULL, NULL);
3642         if (r < 0)
3643                 return r;
3644
3645         r = 0;
3646         for (f = 1; args[f]; f++) {
3647                 const char *name;
3648                 char *p;
3649                 bool found_native = false, found_sysv;
3650                 unsigned c = 1;
3651                 const char *argv[6] = { "/sbin/chkconfig", NULL, NULL, NULL, NULL };
3652                 char **k, *l, *q = NULL;
3653                 int j;
3654                 pid_t pid;
3655                 siginfo_t status;
3656
3657                 name = args[f];
3658
3659                 if (!endswith(name, ".service"))
3660                         continue;
3661
3662                 if (path_is_absolute(name))
3663                         continue;
3664
3665                 STRV_FOREACH(k, paths.unit_path) {
3666                         p = NULL;
3667
3668                         if (!isempty(arg_root))
3669                                 asprintf(&p, "%s/%s/%s", arg_root, *k, name);
3670                         else
3671                                 asprintf(&p, "%s/%s", *k, name);
3672
3673                         if (!p) {
3674                                 r = log_oom();
3675                                 goto finish;
3676                         }
3677
3678                         found_native = access(p, F_OK) >= 0;
3679                         free(p);
3680
3681                         if (found_native)
3682                                 break;
3683                 }
3684
3685                 if (found_native)
3686                         continue;
3687
3688                 p = NULL;
3689                 if (!isempty(arg_root))
3690                         asprintf(&p, "%s/" SYSTEM_SYSVINIT_PATH "/%s", arg_root, name);
3691                 else
3692                         asprintf(&p, SYSTEM_SYSVINIT_PATH "/%s", name);
3693                 if (!p) {
3694                         r = log_oom();
3695                         goto finish;
3696                 }
3697
3698                 p[strlen(p) - sizeof(".service") + 1] = 0;
3699                 found_sysv = access(p, F_OK) >= 0;
3700
3701                 if (!found_sysv) {
3702                         free(p);
3703                         continue;
3704                 }
3705
3706                 /* Mark this entry, so that we don't try enabling it as native unit */
3707                 args[f] = (char*) "";
3708
3709                 log_info("%s is not a native service, redirecting to /sbin/chkconfig.", name);
3710
3711                 if (!isempty(arg_root))
3712                         argv[c++] = q = strappend("--root=", arg_root);
3713
3714                 argv[c++] = path_get_file_name(p);
3715                 argv[c++] =
3716                         streq(verb, "enable") ? "on" :
3717                         streq(verb, "disable") ? "off" : "--level=5";
3718                 argv[c] = NULL;
3719
3720                 l = strv_join((char**)argv, " ");
3721                 if (!l) {
3722                         free(q);
3723                         free(p);
3724                         r = log_oom();
3725                         goto finish;
3726                 }
3727
3728                 log_info("Executing %s", l);
3729                 free(l);
3730
3731                 pid = fork();
3732                 if (pid < 0) {
3733                         log_error("Failed to fork: %m");
3734                         free(p);
3735                         free(q);
3736                         r = -errno;
3737                         goto finish;
3738                 } else if (pid == 0) {
3739                         /* Child */
3740
3741                         execv(argv[0], (char**) argv);
3742                         _exit(EXIT_FAILURE);
3743                 }
3744
3745                 free(p);
3746                 free(q);
3747
3748                 j = wait_for_terminate(pid, &status);
3749                 if (j < 0) {
3750                         log_error("Failed to wait for child: %s", strerror(-r));
3751                         r = j;
3752                         goto finish;
3753                 }
3754
3755                 if (status.si_code == CLD_EXITED) {
3756                         if (streq(verb, "is-enabled")) {
3757                                 if (status.si_status == 0) {
3758                                         if (!arg_quiet)
3759                                                 puts("enabled");
3760                                         r = 1;
3761                                 } else {
3762                                         if (!arg_quiet)
3763                                                 puts("disabled");
3764                                 }
3765
3766                         } else if (status.si_status != 0) {
3767                                 r = -EINVAL;
3768                                 goto finish;
3769                         }
3770                 } else {
3771                         r = -EPROTO;
3772                         goto finish;
3773                 }
3774         }
3775
3776 finish:
3777         lookup_paths_free(&paths);
3778
3779         /* Drop all SysV units */
3780         for (f = 1, t = 1; args[f]; f++) {
3781
3782                 if (isempty(args[f]))
3783                         continue;
3784
3785                 args[t++] = args[f];
3786         }
3787
3788         args[t] = NULL;
3789
3790 #endif
3791         return r;
3792 }
3793
3794 static int mangle_names(char **original_names, char ***mangled_names) {
3795         char **i, **l, **name;
3796
3797         l = new(char*, strv_length(original_names) + 1);
3798         if (!l)
3799                 return log_oom();
3800
3801         i = l;
3802         STRV_FOREACH(name, original_names) {
3803
3804                 /* When enabling units qualified path names are OK,
3805                  * too, hence allow them explicitly. */
3806
3807                 if (is_path(*name))
3808                         *i = strdup(*name);
3809                 else
3810                         *i = unit_name_mangle(*name);
3811
3812                 if (!*i) {
3813                         strv_free(l);
3814                         return log_oom();
3815                 }
3816
3817                 i++;
3818         }
3819
3820         *i = NULL;
3821         *mangled_names = l;
3822
3823         return 0;
3824 }
3825
3826 static int enable_unit(DBusConnection *bus, char **args) {
3827         const char *verb = args[0];
3828         UnitFileChange *changes = NULL;
3829         unsigned n_changes = 0, i;
3830         int carries_install_info = -1;
3831         DBusMessage _cleanup_dbus_message_unref_ *m = NULL, *reply = NULL;
3832         int r;
3833         DBusError _cleanup_dbus_error_free_ error;
3834         char _cleanup_strv_free_ **mangled_names = NULL;
3835
3836         dbus_error_init(&error);
3837
3838         r = enable_sysv_units(args);
3839         if (r < 0)
3840                 return r;
3841
3842         if (!args[1])
3843                 return 0;
3844
3845         if (!bus || avoid_bus()) {
3846                 if (streq(verb, "enable")) {
3847                         r = unit_file_enable(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3848                         carries_install_info = r;
3849                 } else if (streq(verb, "disable"))
3850                         r = unit_file_disable(arg_scope, arg_runtime, arg_root, args+1, &changes, &n_changes);
3851                 else if (streq(verb, "reenable")) {
3852                         r = unit_file_reenable(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3853                         carries_install_info = r;
3854                 } else if (streq(verb, "link"))
3855                         r = unit_file_link(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3856                 else if (streq(verb, "preset")) {
3857                         r = unit_file_preset(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3858                         carries_install_info = r;
3859                 } else if (streq(verb, "mask"))
3860                         r = unit_file_mask(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3861                 else if (streq(verb, "unmask"))
3862                         r = unit_file_unmask(arg_scope, arg_runtime, arg_root, args+1, &changes, &n_changes);
3863                 else
3864                         assert_not_reached("Unknown verb");
3865
3866                 if (r < 0) {
3867                         log_error("Operation failed: %s", strerror(-r));
3868                         goto finish;
3869                 }
3870
3871                 if (!arg_quiet) {
3872                         for (i = 0; i < n_changes; i++) {
3873                                 if (changes[i].type == UNIT_FILE_SYMLINK)
3874                                         log_info("ln -s '%s' '%s'", changes[i].source, changes[i].path);
3875                                 else
3876                                         log_info("rm '%s'", changes[i].path);
3877                         }
3878                 }
3879
3880                 r = 0;
3881         } else {
3882                 const char *method;
3883                 bool send_force = true, expect_carries_install_info = false;
3884                 dbus_bool_t a, b;
3885                 DBusMessageIter iter, sub, sub2;
3886
3887                 if (streq(verb, "enable")) {
3888                         method = "EnableUnitFiles";
3889                         expect_carries_install_info = true;
3890                 } else if (streq(verb, "disable")) {
3891                         method = "DisableUnitFiles";
3892                         send_force = false;
3893                 } else if (streq(verb, "reenable")) {
3894                         method = "ReenableUnitFiles";
3895                         expect_carries_install_info = true;
3896                 } else if (streq(verb, "link"))
3897                         method = "LinkUnitFiles";
3898                 else if (streq(verb, "preset")) {
3899                         method = "PresetUnitFiles";
3900                         expect_carries_install_info = true;
3901                 } else if (streq(verb, "mask"))
3902                         method = "MaskUnitFiles";
3903                 else if (streq(verb, "unmask")) {
3904                         method = "UnmaskUnitFiles";
3905                         send_force = false;
3906                 } else
3907                         assert_not_reached("Unknown verb");
3908
3909                 m = dbus_message_new_method_call(
3910                                 "org.freedesktop.systemd1",
3911                                 "/org/freedesktop/systemd1",
3912                                 "org.freedesktop.systemd1.Manager",
3913                                 method);
3914                 if (!m) {
3915                         r = log_oom();
3916                         goto finish;
3917                 }
3918
3919                 dbus_message_iter_init_append(m, &iter);
3920
3921                 r = mangle_names(args+1, &mangled_names);
3922                 if(r < 0)
3923                         goto finish;
3924
3925                 r = bus_append_strv_iter(&iter, mangled_names);
3926                 if (r < 0) {
3927                         log_error("Failed to append unit files.");
3928                         goto finish;
3929                 }
3930
3931                 a = arg_runtime;
3932                 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &a)) {
3933                         log_error("Failed to append runtime boolean.");
3934                         r = -ENOMEM;
3935                         goto finish;
3936                 }
3937
3938                 if (send_force) {
3939                         b = arg_force;
3940
3941                         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b)) {
3942                                 log_error("Failed to append force boolean.");
3943                                 r = -ENOMEM;
3944                                 goto finish;
3945                         }
3946                 }
3947
3948                 reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
3949                 if (!reply) {
3950                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3951                         r = -EIO;
3952                         goto finish;
3953                 }
3954
3955                 if (!dbus_message_iter_init(reply, &iter)) {
3956                         log_error("Failed to initialize iterator.");
3957                         goto finish;
3958                 }
3959
3960                 if (expect_carries_install_info) {
3961                         r = bus_iter_get_basic_and_next(&iter, DBUS_TYPE_BOOLEAN, &b, true);
3962                         if (r < 0) {
3963                                 log_error("Failed to parse reply.");
3964                                 goto finish;
3965                         }
3966
3967                         carries_install_info = b;
3968                 }
3969
3970                 if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
3971                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
3972                         log_error("Failed to parse reply.");
3973                         r = -EIO;
3974                         goto finish;
3975                 }
3976
3977                 dbus_message_iter_recurse(&iter, &sub);
3978                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
3979                         const char *type, *path, *source;
3980
3981                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
3982                                 log_error("Failed to parse reply.");
3983                                 r = -EIO;
3984                                 goto finish;
3985                         }
3986
3987                         dbus_message_iter_recurse(&sub, &sub2);
3988
3989                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
3990                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0 ||
3991                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &source, false) < 0) {
3992                                 log_error("Failed to parse reply.");
3993                                 r = -EIO;
3994                                 goto finish;
3995                         }
3996
3997                         if (!arg_quiet) {
3998                                 if (streq(type, "symlink"))
3999                                         log_info("ln -s '%s' '%s'", source, path);
4000                                 else
4001                                         log_info("rm '%s'", path);
4002                         }
4003
4004                         dbus_message_iter_next(&sub);
4005                 }
4006
4007                 /* Try to reload if enabeld */
4008                 if (!arg_no_reload)
4009                         r = daemon_reload(bus, args);
4010         }
4011
4012         if (carries_install_info == 0)
4013                 log_warning(
4014 "The unit files have no [Install] section. They are not meant to be enabled\n"
4015 "using systemctl.\n"
4016 "Possible reasons for having this kind of units are:\n"
4017 "1) A unit may be statically enabled by being symlinked from another unit's\n"
4018 "   .wants/ or .requires/ directory.\n"
4019 "2) A unit's purpose may be to act as a helper for some other unit which has\n"
4020 "   a requirement dependency on it.\n"
4021 "3) A unit may be started when needed via activation (socket, path, timer,\n"
4022 "   D-Bus, udev, scripted systemctl call, ...).\n");
4023
4024 finish:
4025         unit_file_changes_free(changes, n_changes);
4026
4027         return r;
4028 }
4029
4030 static int unit_is_enabled(DBusConnection *bus, char **args) {
4031         DBusError _cleanup_dbus_error_free_ error;
4032         int r;
4033         DBusMessage _cleanup_dbus_message_unref_ *reply = NULL;
4034         bool enabled;
4035         char **name;
4036
4037         dbus_error_init(&error);
4038
4039         r = enable_sysv_units(args);
4040         if (r < 0)
4041                 return r;
4042
4043         enabled = r > 0;
4044
4045         if (!bus || avoid_bus()) {
4046
4047                 STRV_FOREACH(name, args+1) {
4048                         UnitFileState state;
4049
4050                         state = unit_file_get_state(arg_scope, arg_root, *name);
4051                         if (state < 0)
4052                                 return state;
4053
4054                         if (state == UNIT_FILE_ENABLED ||
4055                             state == UNIT_FILE_ENABLED_RUNTIME ||
4056                             state == UNIT_FILE_STATIC)
4057                                 enabled = true;
4058
4059                         if (!arg_quiet)
4060                                 puts(unit_file_state_to_string(state));
4061                 }
4062
4063         } else {
4064                 STRV_FOREACH(name, args+1) {
4065                         const char *s;
4066
4067                         r = bus_method_call_with_reply (
4068                                         bus,
4069                                         "org.freedesktop.systemd1",
4070                                         "/org/freedesktop/systemd1",
4071                                         "org.freedesktop.systemd1.Manager",
4072                                         "GetUnitFileState",
4073                                         &reply,
4074                                         NULL,
4075                                         DBUS_TYPE_STRING, name,
4076                                         DBUS_TYPE_INVALID);
4077                         if (r)
4078                                 return r;
4079
4080                         if (!dbus_message_get_args(reply, &error,
4081                                                    DBUS_TYPE_STRING, &s,
4082                                                    DBUS_TYPE_INVALID)) {
4083                                 log_error("Failed to parse reply: %s", bus_error_message(&error));
4084                                 return -EIO;
4085                         }
4086
4087                         dbus_message_unref(reply);
4088                         reply = NULL;
4089
4090                         if (streq(s, "enabled") ||
4091                             streq(s, "enabled-runtime") ||
4092                             streq(s, "static"))
4093                                 enabled = true;
4094
4095                         if (!arg_quiet)
4096                                 puts(s);
4097                 }
4098         }
4099
4100         return enabled ? 0 : 1;
4101 }
4102
4103 static int systemctl_help(void) {
4104
4105         pager_open_if_enabled();
4106
4107         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
4108                "Query or send control commands to the systemd manager.\n\n"
4109                "  -h --help           Show this help\n"
4110                "     --version        Show package version\n"
4111                "  -t --type=TYPE      List only units of a particular type\n"
4112                "  -p --property=NAME  Show only properties by this name\n"
4113                "  -a --all            Show all units/properties, including dead/empty ones\n"
4114                "     --failed         Show only failed units\n"
4115                "     --full           Don't ellipsize unit names on output\n"
4116                "     --fail           When queueing a new job, fail if conflicting jobs are\n"
4117                "                      pending\n"
4118                "     --ignore-dependencies\n"
4119                "                      When queueing a new job, ignore all its dependencies\n"
4120                "  -i --ignore-inhibitors\n"
4121                "                      When shutting down or sleeping, ignore inhibitors\n"
4122                "     --kill-who=WHO   Who to send signal to\n"
4123                "  -s --signal=SIGNAL  Which signal to send\n"
4124                "  -H --host=[USER@]HOST\n"
4125                "                      Show information for remote host\n"
4126                "  -P --privileged     Acquire privileges before execution\n"
4127                "  -q --quiet          Suppress output\n"
4128                "     --no-block       Do not wait until operation finished\n"
4129                "     --no-wall        Don't send wall message before halt/power-off/reboot\n"
4130                "     --no-reload      When enabling/disabling unit files, don't reload daemon\n"
4131                "                      configuration\n"
4132                "     --no-legend      Do not print a legend (column headers and hints)\n"
4133                "     --no-pager       Do not pipe output into a pager\n"
4134                "     --no-ask-password\n"
4135                "                      Do not ask for system passwords\n"
4136                "     --system         Connect to system manager\n"
4137                "     --user           Connect to user service manager\n"
4138                "     --global         Enable/disable unit files globally\n"
4139                "  -f --force          When enabling unit files, override existing symlinks\n"
4140                "                      When shutting down, execute action immediately\n"
4141                "     --root=PATH      Enable unit files in the specified root directory\n"
4142                "     --runtime        Enable unit files only temporarily until next reboot\n"
4143                "  -n --lines=INTEGER  Journal entries to show\n"
4144                "  -o --output=STRING  Change journal output mode (short, short-monotonic,\n"
4145                "                      verbose, export, json, json-pretty, json-sse, cat)\n\n"
4146                "Unit Commands:\n"
4147                "  list-units                      List loaded units\n"
4148                "  start [NAME...]                 Start (activate) one or more units\n"
4149                "  stop [NAME...]                  Stop (deactivate) one or more units\n"
4150                "  reload [NAME...]                Reload one or more units\n"
4151                "  restart [NAME...]               Start or restart one or more units\n"
4152                "  try-restart [NAME...]           Restart one or more units if active\n"
4153                "  reload-or-restart [NAME...]     Reload one or more units if possible,\n"
4154                "                                  otherwise start or restart\n"
4155                "  reload-or-try-restart [NAME...] Reload one or more units if possible,\n"
4156                "                                  otherwise restart if active\n"
4157                "  isolate [NAME]                  Start one unit and stop all others\n"
4158                "  kill [NAME...]                  Send signal to processes of a unit\n"
4159                "  is-active [NAME...]             Check whether units are active\n"
4160                "  is-failed [NAME...]             Check whether units are failed\n"
4161                "  status [NAME...|PID...]         Show runtime status of one or more units\n"
4162                "  show [NAME...|JOB...]           Show properties of one or more\n"
4163                "                                  units/jobs or the manager\n"
4164                "  help [NAME...|PID...]           Show manual for one or more units\n"
4165                "  reset-failed [NAME...]          Reset failed state for all, one, or more\n"
4166                "                                  units\n"
4167                "  get-cgroup-attr [NAME] [ATTR] ...\n"
4168                "                                  Get control group attrubute\n"
4169                "  set-cgroup-attr [NAME] [ATTR] [VALUE] ...\n"
4170                "                                  Set control group attribute\n"
4171                "  unset-cgroup-attr [NAME] [ATTR...]\n"
4172                "                                  Unset control group attribute\n"
4173                "  set-cgroup [NAME] [CGROUP...]   Add unit to a control group\n"
4174                "  unset-cgroup [NAME] [CGROUP...] Remove unit from a control group\n"
4175                "  load [NAME...]                  Load one or more units\n"
4176                "  list-dependencies [NAME]        Recursively show units which are required\n"
4177                "                                  or wanted by this unit\n\n"
4178                "Unit File Commands:\n"
4179                "  list-unit-files                 List installed unit files\n"
4180                "  enable [NAME...]                Enable one or more unit files\n"
4181                "  disable [NAME...]               Disable one or more unit files\n"
4182                "  reenable [NAME...]              Reenable one or more unit files\n"
4183                "  preset [NAME...]                Enable/disable one or more unit files\n"
4184                "                                  based on preset configuration\n"
4185                "  mask [NAME...]                  Mask one or more units\n"
4186                "  unmask [NAME...]                Unmask one or more units\n"
4187                "  link [PATH...]                  Link one or more units files into\n"
4188                "                                  the search path\n"
4189                "  is-enabled [NAME...]            Check whether unit files are enabled\n\n"
4190                "Job Commands:\n"
4191                "  list-jobs                       List jobs\n"
4192                "  cancel [JOB...]                 Cancel all, one, or more jobs\n\n"
4193                "Status Commands:\n"
4194                "  dump                            Dump server status\n"
4195                "Snapshot Commands:\n"
4196                "  snapshot [NAME]                 Create a snapshot\n"
4197                "  delete [NAME...]                Remove one or more snapshots\n\n"
4198                "Environment Commands:\n"
4199                "  show-environment                Dump environment\n"
4200                "  set-environment [NAME=VALUE...] Set one or more environment variables\n"
4201                "  unset-environment [NAME...]     Unset one or more environment variables\n\n"
4202                "Manager Lifecycle Commands:\n"
4203                "  daemon-reload                   Reload systemd manager configuration\n"
4204                "  daemon-reexec                   Reexecute systemd manager\n\n"
4205                "System Commands:\n"
4206                "  default                         Enter system default mode\n"
4207                "  rescue                          Enter system rescue mode\n"
4208                "  emergency                       Enter system emergency mode\n"
4209                "  halt                            Shut down and halt the system\n"
4210                "  poweroff                        Shut down and power-off the system\n"
4211                "  reboot                          Shut down and reboot the system\n"
4212                "  kexec                           Shut down and reboot the system with kexec\n"
4213                "  exit                            Request user instance exit\n"
4214                "  switch-root [ROOT] [INIT]       Change to a different root file system\n"
4215                "  suspend                         Suspend the system\n"
4216                "  hibernate                       Hibernate the system\n"
4217                "  hybrid-sleep                    Hibernate and suspend the system\n",
4218                program_invocation_short_name);
4219
4220         return 0;
4221 }
4222
4223 static int halt_help(void) {
4224
4225         printf("%s [OPTIONS...]\n\n"
4226                "%s the system.\n\n"
4227                "     --help      Show this help\n"
4228                "     --halt      Halt the machine\n"
4229                "  -p --poweroff  Switch off the machine\n"
4230                "     --reboot    Reboot the machine\n"
4231                "  -f --force     Force immediate halt/power-off/reboot\n"
4232                "  -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record\n"
4233                "  -d --no-wtmp   Don't write wtmp record\n"
4234                "     --no-wall   Don't send wall message before halt/power-off/reboot\n",
4235                program_invocation_short_name,
4236                arg_action == ACTION_REBOOT   ? "Reboot" :
4237                arg_action == ACTION_POWEROFF ? "Power off" :
4238                                                "Halt");
4239
4240         return 0;
4241 }
4242
4243 static int shutdown_help(void) {
4244
4245         printf("%s [OPTIONS...] [TIME] [WALL...]\n\n"
4246                "Shut down the system.\n\n"
4247                "     --help      Show this help\n"
4248                "  -H --halt      Halt the machine\n"
4249                "  -P --poweroff  Power-off the machine\n"
4250                "  -r --reboot    Reboot the machine\n"
4251                "  -h             Equivalent to --poweroff, overridden by --halt\n"
4252                "  -k             Don't halt/power-off/reboot, just send warnings\n"
4253                "     --no-wall   Don't send wall message before halt/power-off/reboot\n"
4254                "  -c             Cancel a pending shutdown\n",
4255                program_invocation_short_name);
4256
4257         return 0;
4258 }
4259
4260 static int telinit_help(void) {
4261
4262         printf("%s [OPTIONS...] {COMMAND}\n\n"
4263                "Send control commands to the init daemon.\n\n"
4264                "     --help      Show this help\n"
4265                "     --no-wall   Don't send wall message before halt/power-off/reboot\n\n"
4266                "Commands:\n"
4267                "  0              Power-off the machine\n"
4268                "  6              Reboot the machine\n"
4269                "  2, 3, 4, 5     Start runlevelX.target unit\n"
4270                "  1, s, S        Enter rescue mode\n"
4271                "  q, Q           Reload init daemon configuration\n"
4272                "  u, U           Reexecute init daemon\n",
4273                program_invocation_short_name);
4274
4275         return 0;
4276 }
4277
4278 static int runlevel_help(void) {
4279
4280         printf("%s [OPTIONS...]\n\n"
4281                "Prints the previous and current runlevel of the init system.\n\n"
4282                "     --help      Show this help\n",
4283                program_invocation_short_name);
4284
4285         return 0;
4286 }
4287
4288 static int help_types(void) {
4289         int i;
4290
4291         puts("Available unit types:");
4292         for(i = UNIT_SERVICE; i < _UNIT_TYPE_MAX; i++)
4293                 if (unit_type_table[i])
4294                         puts(unit_type_table[i]);
4295
4296         puts("\nAvailable unit load states: ");
4297         for(i = UNIT_STUB; i < _UNIT_LOAD_STATE_MAX; i++)
4298                 if (unit_type_table[i])
4299                         puts(unit_load_state_table[i]);
4300
4301         return 0;
4302 }
4303
4304 static int systemctl_parse_argv(int argc, char *argv[]) {
4305
4306         enum {
4307                 ARG_FAIL = 0x100,
4308                 ARG_IGNORE_DEPENDENCIES,
4309                 ARG_VERSION,
4310                 ARG_USER,
4311                 ARG_SYSTEM,
4312                 ARG_GLOBAL,
4313                 ARG_NO_BLOCK,
4314                 ARG_NO_LEGEND,
4315                 ARG_NO_PAGER,
4316                 ARG_NO_WALL,
4317                 ARG_ROOT,
4318                 ARG_FULL,
4319                 ARG_NO_RELOAD,
4320                 ARG_KILL_WHO,
4321                 ARG_NO_ASK_PASSWORD,
4322                 ARG_FAILED,
4323                 ARG_RUNTIME,
4324                 ARG_FORCE
4325         };
4326
4327         static const struct option options[] = {
4328                 { "help",      no_argument,       NULL, 'h'           },
4329                 { "version",   no_argument,       NULL, ARG_VERSION   },
4330                 { "type",      required_argument, NULL, 't'           },
4331                 { "property",  required_argument, NULL, 'p'           },
4332                 { "all",       no_argument,       NULL, 'a'           },
4333                 { "failed",    no_argument,       NULL, ARG_FAILED    },
4334                 { "full",      no_argument,       NULL, ARG_FULL      },
4335                 { "fail",      no_argument,       NULL, ARG_FAIL      },
4336                 { "ignore-dependencies", no_argument, NULL, ARG_IGNORE_DEPENDENCIES },
4337                 { "ignore-inhibitors", no_argument, NULL, 'i'         },
4338                 { "user",      no_argument,       NULL, ARG_USER      },
4339                 { "system",    no_argument,       NULL, ARG_SYSTEM    },
4340                 { "global",    no_argument,       NULL, ARG_GLOBAL    },
4341                 { "no-block",  no_argument,       NULL, ARG_NO_BLOCK  },
4342                 { "no-legend", no_argument,       NULL, ARG_NO_LEGEND },
4343                 { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
4344                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL   },
4345                 { "quiet",     no_argument,       NULL, 'q'           },
4346                 { "root",      required_argument, NULL, ARG_ROOT      },
4347                 { "force",     no_argument,       NULL, ARG_FORCE     },
4348                 { "no-reload", no_argument,       NULL, ARG_NO_RELOAD },
4349                 { "kill-who",  required_argument, NULL, ARG_KILL_WHO  },
4350                 { "signal",    required_argument, NULL, 's'           },
4351                 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
4352                 { "host",      required_argument, NULL, 'H'           },
4353                 { "privileged",no_argument,       NULL, 'P'           },
4354                 { "runtime",   no_argument,       NULL, ARG_RUNTIME   },
4355                 { "lines",     required_argument, NULL, 'n'           },
4356                 { "output",    required_argument, NULL, 'o'           },
4357                 { NULL,        0,                 NULL, 0             }
4358         };
4359
4360         int c;
4361
4362         assert(argc >= 0);
4363         assert(argv);
4364
4365         while ((c = getopt_long(argc, argv, "ht:p:aqfs:H:Pn:o:i", options, NULL)) >= 0) {
4366
4367                 switch (c) {
4368
4369                 case 'h':
4370                         systemctl_help();
4371                         return 0;
4372
4373                 case ARG_VERSION:
4374                         puts(PACKAGE_STRING);
4375                         puts(SYSTEMD_FEATURES);
4376                         return 0;
4377
4378                 case 't':
4379                         if (streq(optarg, "help")) {
4380                                 help_types();
4381                                 return 0;
4382                         }
4383
4384                         if (unit_type_from_string(optarg) >= 0) {
4385                                 arg_type = optarg;
4386                                 break;
4387                         }
4388                         if (unit_load_state_from_string(optarg) >= 0) {
4389                                 arg_load_state = optarg;
4390                                 break;
4391                         }
4392                         log_error("Unkown unit type or load state '%s'.",
4393                                   optarg);
4394                         log_info("Use -t help to see a list of allowed values.");
4395                         return -EINVAL;
4396                 case 'p': {
4397                         char **l;
4398
4399                         if (!(l = strv_append(arg_property, optarg)))
4400                                 return -ENOMEM;
4401
4402                         strv_free(arg_property);
4403                         arg_property = l;
4404
4405                         /* If the user asked for a particular
4406                          * property, show it to him, even if it is
4407                          * empty. */
4408                         arg_all = true;
4409                         break;
4410                 }
4411
4412                 case 'a':
4413                         arg_all = true;
4414                         break;
4415
4416                 case ARG_FAIL:
4417                         arg_job_mode = "fail";
4418                         break;
4419
4420                 case ARG_IGNORE_DEPENDENCIES:
4421                         arg_job_mode = "ignore-dependencies";
4422                         break;
4423
4424                 case ARG_USER:
4425                         arg_scope = UNIT_FILE_USER;
4426                         break;
4427
4428                 case ARG_SYSTEM:
4429                         arg_scope = UNIT_FILE_SYSTEM;
4430                         break;
4431
4432                 case ARG_GLOBAL:
4433                         arg_scope = UNIT_FILE_GLOBAL;
4434                         break;
4435
4436                 case ARG_NO_BLOCK:
4437                         arg_no_block = true;
4438                         break;
4439
4440                 case ARG_NO_LEGEND:
4441                         arg_no_legend = true;
4442                         break;
4443
4444                 case ARG_NO_PAGER:
4445                         arg_no_pager = true;
4446                         break;
4447
4448                 case ARG_NO_WALL:
4449                         arg_no_wall = true;
4450                         break;
4451
4452                 case ARG_ROOT:
4453                         arg_root = optarg;
4454                         break;
4455
4456                 case ARG_FULL:
4457                         arg_full = true;
4458                         break;
4459
4460                 case ARG_FAILED:
4461                         arg_failed = true;
4462                         break;
4463
4464                 case 'q':
4465                         arg_quiet = true;
4466                         break;
4467
4468                 case ARG_FORCE:
4469                         arg_force ++;
4470                         break;
4471
4472                 case 'f':
4473                         arg_force ++;
4474                         break;
4475
4476                 case ARG_NO_RELOAD:
4477                         arg_no_reload = true;
4478                         break;
4479
4480                 case ARG_KILL_WHO:
4481                         arg_kill_who = optarg;
4482                         break;
4483
4484                 case 's':
4485                         if ((arg_signal = signal_from_string_try_harder(optarg)) < 0) {
4486                                 log_error("Failed to parse signal string %s.", optarg);
4487                                 return -EINVAL;
4488                         }
4489                         break;
4490
4491                 case ARG_NO_ASK_PASSWORD:
4492                         arg_ask_password = false;
4493                         break;
4494
4495                 case 'P':
4496                         arg_transport = TRANSPORT_POLKIT;
4497                         break;
4498
4499                 case 'H':
4500                         arg_transport = TRANSPORT_SSH;
4501                         arg_host = optarg;
4502                         break;
4503
4504                 case ARG_RUNTIME:
4505                         arg_runtime = true;
4506                         break;
4507
4508                 case 'n':
4509                         if (safe_atou(optarg, &arg_lines) < 0) {
4510                                 log_error("Failed to parse lines '%s'", optarg);
4511                                 return -EINVAL;
4512                         }
4513                         break;
4514
4515                 case 'o':
4516                         arg_output = output_mode_from_string(optarg);
4517                         if (arg_output < 0) {
4518                                 log_error("Unknown output '%s'.", optarg);
4519                                 return -EINVAL;
4520                         }
4521                         break;
4522
4523                 case 'i':
4524                         arg_ignore_inhibitors = true;
4525                         break;
4526
4527                 case '?':
4528                         return -EINVAL;
4529
4530                 default:
4531                         log_error("Unknown option code '%c'.", c);
4532                         return -EINVAL;
4533                 }
4534         }
4535
4536         if (arg_transport != TRANSPORT_NORMAL && arg_scope != UNIT_FILE_SYSTEM) {
4537                 log_error("Cannot access user instance remotely.");
4538                 return -EINVAL;
4539         }
4540
4541         return 1;
4542 }
4543
4544 static int halt_parse_argv(int argc, char *argv[]) {
4545
4546         enum {
4547                 ARG_HELP = 0x100,
4548                 ARG_HALT,
4549                 ARG_REBOOT,
4550                 ARG_NO_WALL
4551         };
4552
4553         static const struct option options[] = {
4554                 { "help",      no_argument,       NULL, ARG_HELP    },
4555                 { "halt",      no_argument,       NULL, ARG_HALT    },
4556                 { "poweroff",  no_argument,       NULL, 'p'         },
4557                 { "reboot",    no_argument,       NULL, ARG_REBOOT  },
4558                 { "force",     no_argument,       NULL, 'f'         },
4559                 { "wtmp-only", no_argument,       NULL, 'w'         },
4560                 { "no-wtmp",   no_argument,       NULL, 'd'         },
4561                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4562                 { NULL,        0,                 NULL, 0           }
4563         };
4564
4565         int c, runlevel;
4566
4567         assert(argc >= 0);
4568         assert(argv);
4569
4570         if (utmp_get_runlevel(&runlevel, NULL) >= 0)
4571                 if (runlevel == '0' || runlevel == '6')
4572                         arg_force = 2;
4573
4574         while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) {
4575                 switch (c) {
4576
4577                 case ARG_HELP:
4578                         halt_help();
4579                         return 0;
4580
4581                 case ARG_HALT:
4582                         arg_action = ACTION_HALT;
4583                         break;
4584
4585                 case 'p':
4586                         if (arg_action != ACTION_REBOOT)
4587                                 arg_action = ACTION_POWEROFF;
4588                         break;
4589
4590                 case ARG_REBOOT:
4591                         arg_action = ACTION_REBOOT;
4592                         break;
4593
4594                 case 'f':
4595                         arg_force = 2;
4596                         break;
4597
4598                 case 'w':
4599                         arg_dry = true;
4600                         break;
4601
4602                 case 'd':
4603                         arg_no_wtmp = true;
4604                         break;
4605
4606                 case ARG_NO_WALL:
4607                         arg_no_wall = true;
4608                         break;
4609
4610                 case 'i':
4611                 case 'h':
4612                 case 'n':
4613                         /* Compatibility nops */
4614                         break;
4615
4616                 case '?':
4617                         return -EINVAL;
4618
4619                 default:
4620                         log_error("Unknown option code '%c'.", c);
4621                         return -EINVAL;
4622                 }
4623         }
4624
4625         if (optind < argc) {
4626                 log_error("Too many arguments.");
4627                 return -EINVAL;
4628         }
4629
4630         return 1;
4631 }
4632
4633 static int parse_time_spec(const char *t, usec_t *_u) {
4634         assert(t);
4635         assert(_u);
4636
4637         if (streq(t, "now"))
4638                 *_u = 0;
4639         else if (!strchr(t, ':')) {
4640                 uint64_t u;
4641
4642                 if (safe_atou64(t, &u) < 0)
4643                         return -EINVAL;
4644
4645                 *_u = now(CLOCK_REALTIME) + USEC_PER_MINUTE * u;
4646         } else {
4647                 char *e = NULL;
4648                 long hour, minute;
4649                 struct tm tm;
4650                 time_t s;
4651                 usec_t n;
4652
4653                 errno = 0;
4654                 hour = strtol(t, &e, 10);
4655                 if (errno != 0 || *e != ':' || hour < 0 || hour > 23)
4656                         return -EINVAL;
4657
4658                 minute = strtol(e+1, &e, 10);
4659                 if (errno != 0 || *e != 0 || minute < 0 || minute > 59)
4660                         return -EINVAL;
4661
4662                 n = now(CLOCK_REALTIME);
4663                 s = (time_t) (n / USEC_PER_SEC);
4664
4665                 zero(tm);
4666                 assert_se(localtime_r(&s, &tm));
4667
4668                 tm.tm_hour = (int) hour;
4669                 tm.tm_min = (int) minute;
4670                 tm.tm_sec = 0;
4671
4672                 assert_se(s = mktime(&tm));
4673
4674                 *_u = (usec_t) s * USEC_PER_SEC;
4675
4676                 while (*_u <= n)
4677                         *_u += USEC_PER_DAY;
4678         }
4679
4680         return 0;
4681 }
4682
4683 static int shutdown_parse_argv(int argc, char *argv[]) {
4684
4685         enum {
4686                 ARG_HELP = 0x100,
4687                 ARG_NO_WALL
4688         };
4689
4690         static const struct option options[] = {
4691                 { "help",      no_argument,       NULL, ARG_HELP    },
4692                 { "halt",      no_argument,       NULL, 'H'         },
4693                 { "poweroff",  no_argument,       NULL, 'P'         },
4694                 { "reboot",    no_argument,       NULL, 'r'         },
4695                 { "kexec",     no_argument,       NULL, 'K'         }, /* not documented extension */
4696                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4697                 { NULL,        0,                 NULL, 0           }
4698         };
4699
4700         int c, r;
4701
4702         assert(argc >= 0);
4703         assert(argv);
4704
4705         while ((c = getopt_long(argc, argv, "HPrhkt:afFc", options, NULL)) >= 0) {
4706                 switch (c) {
4707
4708                 case ARG_HELP:
4709                         shutdown_help();
4710                         return 0;
4711
4712                 case 'H':
4713                         arg_action = ACTION_HALT;
4714                         break;
4715
4716                 case 'P':
4717                         arg_action = ACTION_POWEROFF;
4718                         break;
4719
4720                 case 'r':
4721                         if (kexec_loaded())
4722                                 arg_action = ACTION_KEXEC;
4723                         else
4724                                 arg_action = ACTION_REBOOT;
4725                         break;
4726
4727                 case 'K':
4728                         arg_action = ACTION_KEXEC;
4729                         break;
4730
4731                 case 'h':
4732                         if (arg_action != ACTION_HALT)
4733                                 arg_action = ACTION_POWEROFF;
4734                         break;
4735
4736                 case 'k':
4737                         arg_dry = true;
4738                         break;
4739
4740                 case ARG_NO_WALL:
4741                         arg_no_wall = true;
4742                         break;
4743
4744                 case 't':
4745                 case 'a':
4746                         /* Compatibility nops */
4747                         break;
4748
4749                 case 'c':
4750                         arg_action = ACTION_CANCEL_SHUTDOWN;
4751                         break;
4752
4753                 case '?':
4754                         return -EINVAL;
4755
4756                 default:
4757                         log_error("Unknown option code '%c'.", c);
4758                         return -EINVAL;
4759                 }
4760         }
4761
4762         if (argc > optind && arg_action != ACTION_CANCEL_SHUTDOWN) {
4763                 r = parse_time_spec(argv[optind], &arg_when);
4764                 if (r < 0) {
4765                         log_error("Failed to parse time specification: %s", argv[optind]);
4766                         return r;
4767                 }
4768         } else
4769                 arg_when = now(CLOCK_REALTIME) + USEC_PER_MINUTE;
4770
4771         if (argc > optind && arg_action == ACTION_CANCEL_SHUTDOWN)
4772                 /* No time argument for shutdown cancel */
4773                 arg_wall = argv + optind;
4774         else if (argc > optind + 1)
4775                 /* We skip the time argument */
4776                 arg_wall = argv + optind + 1;
4777
4778         optind = argc;
4779
4780         return 1;
4781 }
4782
4783 static int telinit_parse_argv(int argc, char *argv[]) {
4784
4785         enum {
4786                 ARG_HELP = 0x100,
4787                 ARG_NO_WALL
4788         };
4789
4790         static const struct option options[] = {
4791                 { "help",      no_argument,       NULL, ARG_HELP    },
4792                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4793                 { NULL,        0,                 NULL, 0           }
4794         };
4795
4796         static const struct {
4797                 char from;
4798                 enum action to;
4799         } table[] = {
4800                 { '0', ACTION_POWEROFF },
4801                 { '6', ACTION_REBOOT },
4802                 { '1', ACTION_RESCUE },
4803                 { '2', ACTION_RUNLEVEL2 },
4804                 { '3', ACTION_RUNLEVEL3 },
4805                 { '4', ACTION_RUNLEVEL4 },
4806                 { '5', ACTION_RUNLEVEL5 },
4807                 { 's', ACTION_RESCUE },
4808                 { 'S', ACTION_RESCUE },
4809                 { 'q', ACTION_RELOAD },
4810                 { 'Q', ACTION_RELOAD },
4811                 { 'u', ACTION_REEXEC },
4812                 { 'U', ACTION_REEXEC }
4813         };
4814
4815         unsigned i;
4816         int c;
4817
4818         assert(argc >= 0);
4819         assert(argv);
4820
4821         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
4822                 switch (c) {
4823
4824                 case ARG_HELP:
4825                         telinit_help();
4826                         return 0;
4827
4828                 case ARG_NO_WALL:
4829                         arg_no_wall = true;
4830                         break;
4831
4832                 case '?':
4833                         return -EINVAL;
4834
4835                 default:
4836                         log_error("Unknown option code '%c'.", c);
4837                         return -EINVAL;
4838                 }
4839         }
4840
4841         if (optind >= argc) {
4842                 telinit_help();
4843                 return -EINVAL;
4844         }
4845
4846         if (optind + 1 < argc) {
4847                 log_error("Too many arguments.");
4848                 return -EINVAL;
4849         }
4850
4851         if (strlen(argv[optind]) != 1) {
4852                 log_error("Expected single character argument.");
4853                 return -EINVAL;
4854         }
4855
4856         for (i = 0; i < ELEMENTSOF(table); i++)
4857                 if (table[i].from == argv[optind][0])
4858                         break;
4859
4860         if (i >= ELEMENTSOF(table)) {
4861                 log_error("Unknown command '%s'.", argv[optind]);
4862                 return -EINVAL;
4863         }
4864
4865         arg_action = table[i].to;
4866
4867         optind ++;
4868
4869         return 1;
4870 }
4871
4872 static int runlevel_parse_argv(int argc, char *argv[]) {
4873
4874         enum {
4875                 ARG_HELP = 0x100,
4876         };
4877
4878         static const struct option options[] = {
4879                 { "help",      no_argument,       NULL, ARG_HELP    },
4880                 { NULL,        0,                 NULL, 0           }
4881         };
4882
4883         int c;
4884
4885         assert(argc >= 0);
4886         assert(argv);
4887
4888         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
4889                 switch (c) {
4890
4891                 case ARG_HELP:
4892                         runlevel_help();
4893                         return 0;
4894
4895                 case '?':
4896                         return -EINVAL;
4897
4898                 default:
4899                         log_error("Unknown option code '%c'.", c);
4900                         return -EINVAL;
4901                 }
4902         }
4903
4904         if (optind < argc) {
4905                 log_error("Too many arguments.");
4906                 return -EINVAL;
4907         }
4908
4909         return 1;
4910 }
4911
4912 static int parse_argv(int argc, char *argv[]) {
4913         assert(argc >= 0);
4914         assert(argv);
4915
4916         if (program_invocation_short_name) {
4917
4918                 if (strstr(program_invocation_short_name, "halt")) {
4919                         arg_action = ACTION_HALT;
4920                         return halt_parse_argv(argc, argv);
4921                 } else if (strstr(program_invocation_short_name, "poweroff")) {
4922                         arg_action = ACTION_POWEROFF;
4923                         return halt_parse_argv(argc, argv);
4924                 } else if (strstr(program_invocation_short_name, "reboot")) {
4925                         if (kexec_loaded())
4926                                 arg_action = ACTION_KEXEC;
4927                         else
4928                                 arg_action = ACTION_REBOOT;
4929                         return halt_parse_argv(argc, argv);
4930                 } else if (strstr(program_invocation_short_name, "shutdown")) {
4931                         arg_action = ACTION_POWEROFF;
4932                         return shutdown_parse_argv(argc, argv);
4933                 } else if (strstr(program_invocation_short_name, "init")) {
4934
4935                         if (sd_booted() > 0) {
4936                                 arg_action = ACTION_INVALID;
4937                                 return telinit_parse_argv(argc, argv);
4938                         } else {
4939                                 /* Hmm, so some other init system is
4940                                  * running, we need to forward this
4941                                  * request to it. For now we simply
4942                                  * guess that it is Upstart. */
4943
4944                                 execv("/lib/upstart/telinit", argv);
4945
4946                                 log_error("Couldn't find an alternative telinit implementation to spawn.");
4947                                 return -EIO;
4948                         }
4949
4950                 } else if (strstr(program_invocation_short_name, "runlevel")) {
4951                         arg_action = ACTION_RUNLEVEL;
4952                         return runlevel_parse_argv(argc, argv);
4953                 }
4954         }
4955
4956         arg_action = ACTION_SYSTEMCTL;
4957         return systemctl_parse_argv(argc, argv);
4958 }
4959
4960 static int action_to_runlevel(void) {
4961
4962         static const char table[_ACTION_MAX] = {
4963                 [ACTION_HALT] =      '0',
4964                 [ACTION_POWEROFF] =  '0',
4965                 [ACTION_REBOOT] =    '6',
4966                 [ACTION_RUNLEVEL2] = '2',
4967                 [ACTION_RUNLEVEL3] = '3',
4968                 [ACTION_RUNLEVEL4] = '4',
4969                 [ACTION_RUNLEVEL5] = '5',
4970                 [ACTION_RESCUE] =    '1'
4971         };
4972
4973         assert(arg_action < _ACTION_MAX);
4974
4975         return table[arg_action];
4976 }
4977
4978 static int talk_upstart(void) {
4979         DBusMessage _cleanup_dbus_message_unref_ *m = NULL, *reply = NULL;
4980         DBusError _cleanup_dbus_error_free_ error;
4981         int previous, rl, r;
4982         char
4983                 env1_buf[] = "RUNLEVEL=X",
4984                 env2_buf[] = "PREVLEVEL=X";
4985         char *env1 = env1_buf, *env2 = env2_buf;
4986         const char *emit = "runlevel";
4987         dbus_bool_t b_false = FALSE;
4988         DBusMessageIter iter, sub;
4989         DBusConnection *bus;
4990
4991         dbus_error_init(&error);
4992
4993         if (!(rl = action_to_runlevel()))
4994                 return 0;
4995
4996         if (utmp_get_runlevel(&previous, NULL) < 0)
4997                 previous = 'N';
4998
4999         if (!(bus = dbus_connection_open_private("unix:abstract=/com/ubuntu/upstart", &error))) {
5000                 if (dbus_error_has_name(&error, DBUS_ERROR_NO_SERVER)) {
5001                         r = 0;
5002                         goto finish;
5003                 }
5004
5005                 log_error("Failed to connect to Upstart bus: %s", bus_error_message(&error));
5006                 r = -EIO;
5007                 goto finish;
5008         }
5009
5010         if ((r = bus_check_peercred(bus)) < 0) {
5011                 log_error("Failed to verify owner of bus.");
5012                 goto finish;
5013         }
5014
5015         if (!(m = dbus_message_new_method_call(
5016                               "com.ubuntu.Upstart",
5017                               "/com/ubuntu/Upstart",
5018                               "com.ubuntu.Upstart0_6",
5019                               "EmitEvent"))) {
5020
5021                 log_error("Could not allocate message.");
5022                 r = -ENOMEM;
5023                 goto finish;
5024         }
5025
5026         dbus_message_iter_init_append(m, &iter);
5027
5028         env1_buf[sizeof(env1_buf)-2] = rl;
5029         env2_buf[sizeof(env2_buf)-2] = previous;
5030
5031         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &emit) ||
5032             !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub) ||
5033             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env1) ||
5034             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env2) ||
5035             !dbus_message_iter_close_container(&iter, &sub) ||
5036             !dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b_false)) {
5037                 log_error("Could not append arguments to message.");
5038                 r = -ENOMEM;
5039                 goto finish;
5040         }
5041
5042         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
5043
5044                 if (bus_error_is_no_service(&error)) {
5045                         r = -EADDRNOTAVAIL;
5046                         goto finish;
5047                 }
5048
5049                 log_error("Failed to issue method call: %s", bus_error_message(&error));
5050                 r = -EIO;
5051                 goto finish;
5052         }
5053
5054         r = 1;
5055
5056 finish:
5057         if (bus) {
5058                 dbus_connection_flush(bus);
5059                 dbus_connection_close(bus);
5060                 dbus_connection_unref(bus);
5061         }
5062
5063         return r;
5064 }
5065
5066 static int talk_initctl(void) {
5067         struct init_request request;
5068         int r, fd;
5069         char rl;
5070
5071         if (!(rl = action_to_runlevel()))
5072                 return 0;
5073
5074         zero(request);
5075         request.magic = INIT_MAGIC;
5076         request.sleeptime = 0;
5077         request.cmd = INIT_CMD_RUNLVL;
5078         request.runlevel = rl;
5079
5080         if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 0) {
5081
5082                 if (errno == ENOENT)
5083                         return 0;
5084
5085                 log_error("Failed to open "INIT_FIFO": %m");
5086                 return -errno;
5087         }
5088
5089         errno = 0;
5090         r = loop_write(fd, &request, sizeof(request), false) != sizeof(request);
5091         close_nointr_nofail(fd);
5092
5093         if (r < 0) {
5094                 log_error("Failed to write to "INIT_FIFO": %m");
5095                 return errno ? -errno : -EIO;
5096         }
5097
5098         return 1;
5099 }
5100
5101 static int systemctl_main(DBusConnection *bus, int argc, char *argv[], DBusError *error) {
5102
5103         static const struct {
5104                 const char* verb;
5105                 const enum {
5106                         MORE,
5107                         LESS,
5108                         EQUAL
5109                 } argc_cmp;
5110                 const int argc;
5111                 int (* const dispatch)(DBusConnection *bus, char **args);
5112         } verbs[] = {
5113                 { "list-units",            LESS,  1, list_units        },
5114                 { "list-unit-files",       EQUAL, 1, list_unit_files   },
5115                 { "list-jobs",             EQUAL, 1, list_jobs         },
5116                 { "clear-jobs",            EQUAL, 1, daemon_reload     },
5117                 { "load",                  MORE,  2, load_unit         },
5118                 { "cancel",                MORE,  2, cancel_job        },
5119                 { "start",                 MORE,  2, start_unit        },
5120                 { "stop",                  MORE,  2, start_unit        },
5121                 { "condstop",              MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
5122                 { "reload",                MORE,  2, start_unit        },
5123                 { "restart",               MORE,  2, start_unit        },
5124                 { "try-restart",           MORE,  2, start_unit        },
5125                 { "reload-or-restart",     MORE,  2, start_unit        },
5126                 { "reload-or-try-restart", MORE,  2, start_unit        },
5127                 { "force-reload",          MORE,  2, start_unit        }, /* For compatibility with SysV */
5128                 { "condreload",            MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
5129                 { "condrestart",           MORE,  2, start_unit        }, /* For compatibility with RH */
5130                 { "isolate",               EQUAL, 2, start_unit        },
5131                 { "set-cgroup",            MORE,  2, set_cgroup        },
5132                 { "unset-cgroup",          MORE,  2, set_cgroup        },
5133                 { "get-cgroup-attr",       MORE,  2, get_cgroup_attr   },
5134                 { "set-cgroup-attr",       MORE,  2, set_cgroup_attr   },
5135                 { "unset-cgroup-attr",     MORE,  2, set_cgroup        },
5136                 { "kill",                  MORE,  2, kill_unit         },
5137                 { "is-active",             MORE,  2, check_unit_active },
5138                 { "check",                 MORE,  2, check_unit_active },
5139                 { "is-failed",             MORE,  2, check_unit_failed },
5140                 { "show",                  MORE,  1, show              },
5141                 { "status",                MORE,  1, show              },
5142                 { "help",                  MORE,  2, show              },
5143                 { "dump",                  EQUAL, 1, dump              },
5144                 { "snapshot",              LESS,  2, snapshot          },
5145                 { "delete",                MORE,  2, delete_snapshot   },
5146                 { "daemon-reload",         EQUAL, 1, daemon_reload     },
5147                 { "daemon-reexec",         EQUAL, 1, daemon_reload     },
5148                 { "show-environment",      EQUAL, 1, show_enviroment   },
5149                 { "set-environment",       MORE,  2, set_environment   },
5150                 { "unset-environment",     MORE,  2, set_environment   },
5151                 { "halt",                  EQUAL, 1, start_special     },
5152                 { "poweroff",              EQUAL, 1, start_special     },
5153                 { "reboot",                EQUAL, 1, start_special     },
5154                 { "kexec",                 EQUAL, 1, start_special     },
5155                 { "suspend",               EQUAL, 1, start_special     },
5156                 { "hibernate",             EQUAL, 1, start_special     },
5157                 { "hybrid-sleep",          EQUAL, 1, start_special     },
5158                 { "default",               EQUAL, 1, start_special     },
5159                 { "rescue",                EQUAL, 1, start_special     },
5160                 { "emergency",             EQUAL, 1, start_special     },
5161                 { "exit",                  EQUAL, 1, start_special     },
5162                 { "reset-failed",          MORE,  1, reset_failed      },
5163                 { "enable",                MORE,  2, enable_unit       },
5164                 { "disable",               MORE,  2, enable_unit       },
5165                 { "is-enabled",            MORE,  2, unit_is_enabled   },
5166                 { "reenable",              MORE,  2, enable_unit       },
5167                 { "preset",                MORE,  2, enable_unit       },
5168                 { "mask",                  MORE,  2, enable_unit       },
5169                 { "unmask",                MORE,  2, enable_unit       },
5170                 { "link",                  MORE,  2, enable_unit       },
5171                 { "switch-root",           MORE,  2, switch_root       },
5172                 { "list-dependencies",     LESS,  2, list_dependencies },
5173         };
5174
5175         int left;
5176         unsigned i;
5177
5178         assert(argc >= 0);
5179         assert(argv);
5180         assert(error);
5181
5182         left = argc - optind;
5183
5184         if (left <= 0)
5185                 /* Special rule: no arguments means "list-units" */
5186                 i = 0;
5187         else {
5188                 if (streq(argv[optind], "help") && !argv[optind+1]) {
5189                         log_error("This command expects one or more "
5190                                   "unit names. Did you mean --help?");
5191                         return -EINVAL;
5192                 }
5193
5194                 for (i = 0; i < ELEMENTSOF(verbs); i++)
5195                         if (streq(argv[optind], verbs[i].verb))
5196                                 break;
5197
5198                 if (i >= ELEMENTSOF(verbs)) {
5199                         log_error("Unknown operation '%s'.", argv[optind]);
5200                         return -EINVAL;
5201                 }
5202         }
5203
5204         switch (verbs[i].argc_cmp) {
5205
5206         case EQUAL:
5207                 if (left != verbs[i].argc) {
5208                         log_error("Invalid number of arguments.");
5209                         return -EINVAL;
5210                 }
5211
5212                 break;
5213
5214         case MORE:
5215                 if (left < verbs[i].argc) {
5216                         log_error("Too few arguments.");
5217                         return -EINVAL;
5218                 }
5219
5220                 break;
5221
5222         case LESS:
5223                 if (left > verbs[i].argc) {
5224                         log_error("Too many arguments.");
5225                         return -EINVAL;
5226                 }
5227
5228                 break;
5229
5230         default:
5231                 assert_not_reached("Unknown comparison operator.");
5232         }
5233
5234         /* Require a bus connection for all operations but
5235          * enable/disable */
5236         if (!streq(verbs[i].verb, "enable") &&
5237             !streq(verbs[i].verb, "disable") &&
5238             !streq(verbs[i].verb, "is-enabled") &&
5239             !streq(verbs[i].verb, "list-unit-files") &&
5240             !streq(verbs[i].verb, "reenable") &&
5241             !streq(verbs[i].verb, "preset") &&
5242             !streq(verbs[i].verb, "mask") &&
5243             !streq(verbs[i].verb, "unmask") &&
5244             !streq(verbs[i].verb, "link")) {
5245
5246                 if (running_in_chroot() > 0) {
5247                         log_info("Running in chroot, ignoring request.");
5248                         return 0;
5249                 }
5250
5251                 if (((!streq(verbs[i].verb, "reboot") &&
5252                       !streq(verbs[i].verb, "halt") &&
5253                       !streq(verbs[i].verb, "poweroff")) || arg_force <= 0) && !bus) {
5254                         log_error("Failed to get D-Bus connection: %s",
5255                                   dbus_error_is_set(error) ? error->message : "No connection to service manager.");
5256                         return -EIO;
5257                 }
5258
5259         } else {
5260
5261                 if (!bus && !avoid_bus()) {
5262                         log_error("Failed to get D-Bus connection: %s",
5263                                   dbus_error_is_set(error) ? error->message : "No connection to service manager.");
5264                         return -EIO;
5265                 }
5266         }
5267
5268         return verbs[i].dispatch(bus, argv + optind);
5269 }
5270
5271 static int send_shutdownd(usec_t t, char mode, bool dry_run, bool warn, const char *message) {
5272         int _cleanup_close_ fd;
5273         struct msghdr msghdr;
5274         struct iovec iovec[2];
5275         union sockaddr_union sockaddr;
5276         struct sd_shutdown_command c;
5277
5278         fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
5279         if (fd < 0)
5280                 return -errno;
5281
5282         zero(c);
5283         c.usec = t;
5284         c.mode = mode;
5285         c.dry_run = dry_run;
5286         c.warn_wall = warn;
5287
5288         zero(sockaddr);
5289         sockaddr.sa.sa_family = AF_UNIX;
5290         strncpy(sockaddr.un.sun_path, "/run/systemd/shutdownd", sizeof(sockaddr.un.sun_path));
5291
5292         zero(msghdr);
5293         msghdr.msg_name = &sockaddr;
5294         msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/systemd/shutdownd") - 1;
5295
5296         zero(iovec);
5297         iovec[0].iov_base = (char*) &c;
5298         iovec[0].iov_len = offsetof(struct sd_shutdown_command, wall_message);
5299
5300         if (isempty(message))
5301                 msghdr.msg_iovlen = 1;
5302         else {
5303                 iovec[1].iov_base = (char*) message;
5304                 iovec[1].iov_len = strlen(message);
5305                 msghdr.msg_iovlen = 2;
5306         }
5307         msghdr.msg_iov = iovec;
5308
5309         if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0)
5310                 return -errno;
5311
5312         return 0;
5313 }
5314
5315 static int reload_with_fallback(DBusConnection *bus) {
5316
5317         if (bus) {
5318                 /* First, try systemd via D-Bus. */
5319                 if (daemon_reload(bus, NULL) >= 0)
5320                         return 0;
5321         }
5322
5323         /* Nothing else worked, so let's try signals */
5324         assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC);
5325
5326         if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) {
5327                 log_error("kill() failed: %m");
5328                 return -errno;
5329         }
5330
5331         return 0;
5332 }
5333
5334 static int start_with_fallback(DBusConnection *bus) {
5335
5336         if (bus) {
5337                 /* First, try systemd via D-Bus. */
5338                 if (start_unit(bus, NULL) >= 0)
5339                         goto done;
5340         }
5341
5342         /* Hmm, talking to systemd via D-Bus didn't work. Then
5343          * let's try to talk to Upstart via D-Bus. */
5344         if (talk_upstart() > 0)
5345                 goto done;
5346
5347         /* Nothing else worked, so let's try
5348          * /dev/initctl */
5349         if (talk_initctl() > 0)
5350                 goto done;
5351
5352         log_error("Failed to talk to init daemon.");
5353         return -EIO;
5354
5355 done:
5356         warn_wall(arg_action);
5357         return 0;
5358 }
5359
5360 static _noreturn_ void halt_now(enum action a) {
5361
5362        /* Make sure C-A-D is handled by the kernel from this
5363          * point on... */
5364         reboot(RB_ENABLE_CAD);
5365
5366         switch (a) {
5367
5368         case ACTION_HALT:
5369                 log_info("Halting.");
5370                 reboot(RB_HALT_SYSTEM);
5371                 break;
5372
5373         case ACTION_POWEROFF:
5374                 log_info("Powering off.");
5375                 reboot(RB_POWER_OFF);
5376                 break;
5377
5378         case ACTION_REBOOT:
5379                 log_info("Rebooting.");
5380                 reboot(RB_AUTOBOOT);
5381                 break;
5382
5383         default:
5384                 assert_not_reached("Unknown halt action.");
5385         }
5386
5387         assert_not_reached("Uh? This shouldn't happen.");
5388 }
5389
5390 static int halt_main(DBusConnection *bus) {
5391         int r;
5392
5393         r = check_inhibitors(bus, arg_action);
5394         if (r < 0)
5395                 return r;
5396
5397         if (geteuid() != 0) {
5398                 /* Try logind if we are a normal user and no special
5399                  * mode applies. Maybe PolicyKit allows us to shutdown
5400                  * the machine. */
5401
5402                 if (arg_when <= 0 &&
5403                     !arg_dry &&
5404                     arg_force <= 0 &&
5405                     (arg_action == ACTION_POWEROFF ||
5406                      arg_action == ACTION_REBOOT)) {
5407                         r = reboot_with_logind(bus, arg_action);
5408                         if (r >= 0)
5409                                 return r;
5410                 }
5411
5412                 log_error("Must be root.");
5413                 return -EPERM;
5414         }
5415
5416         if (arg_when > 0) {
5417                 char _cleanup_free_ *m;
5418
5419                 m = strv_join(arg_wall, " ");
5420                 r = send_shutdownd(arg_when,
5421                                    arg_action == ACTION_HALT     ? 'H' :
5422                                    arg_action == ACTION_POWEROFF ? 'P' :
5423                                    arg_action == ACTION_KEXEC    ? 'K' :
5424                                                                    'r',
5425                                    arg_dry,
5426                                    !arg_no_wall,
5427                                    m);
5428
5429                 if (r < 0)
5430                         log_warning("Failed to talk to shutdownd, proceeding with immediate shutdown: %s", strerror(-r));
5431                 else {
5432                         char date[FORMAT_TIMESTAMP_MAX];
5433
5434                         log_info("Shutdown scheduled for %s, use 'shutdown -c' to cancel.",
5435                                  format_timestamp(date, sizeof(date), arg_when));
5436                         return 0;
5437                 }
5438         }
5439
5440         if (!arg_dry && !arg_force)
5441                 return start_with_fallback(bus);
5442
5443         if (!arg_no_wtmp) {
5444                 if (sd_booted() > 0)
5445                         log_debug("Not writing utmp record, assuming that systemd-update-utmp is used.");
5446                 else {
5447                         r = utmp_put_shutdown();
5448                         if (r < 0)
5449                                 log_warning("Failed to write utmp record: %s", strerror(-r));
5450                 }
5451         }
5452
5453         if (arg_dry)
5454                 return 0;
5455
5456         halt_now(arg_action);
5457         /* We should never reach this. */
5458         return -ENOSYS;
5459 }
5460
5461 static int runlevel_main(void) {
5462         int r, runlevel, previous;
5463
5464         r = utmp_get_runlevel(&runlevel, &previous);
5465         if (r < 0) {
5466                 puts("unknown");
5467                 return r;
5468         }
5469
5470         printf("%c %c\n",
5471                previous <= 0 ? 'N' : previous,
5472                runlevel <= 0 ? 'N' : runlevel);
5473
5474         return 0;
5475 }
5476
5477 int main(int argc, char*argv[]) {
5478         int r, retval = EXIT_FAILURE;
5479         DBusConnection *bus = NULL;
5480         DBusError _cleanup_dbus_error_free_ error;
5481
5482         dbus_error_init(&error);
5483
5484         setlocale(LC_ALL, "");
5485         log_parse_environment();
5486         log_open();
5487
5488         r = parse_argv(argc, argv);
5489         if (r < 0)
5490                 goto finish;
5491         else if (r == 0) {
5492                 retval = EXIT_SUCCESS;
5493                 goto finish;
5494         }
5495
5496         /* /sbin/runlevel doesn't need to communicate via D-Bus, so
5497          * let's shortcut this */
5498         if (arg_action == ACTION_RUNLEVEL) {
5499                 r = runlevel_main();
5500                 retval = r < 0 ? EXIT_FAILURE : r;
5501                 goto finish;
5502         }
5503
5504         if (running_in_chroot() > 0 && arg_action != ACTION_SYSTEMCTL) {
5505                 log_info("Running in chroot, ignoring request.");
5506                 retval = 0;
5507                 goto finish;
5508         }
5509
5510         if (!avoid_bus()) {
5511                 if (arg_transport == TRANSPORT_NORMAL)
5512                         bus_connect(arg_scope == UNIT_FILE_SYSTEM ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, &bus, &private_bus, &error);
5513                 else if (arg_transport == TRANSPORT_POLKIT) {
5514                         bus_connect_system_polkit(&bus, &error);
5515                         private_bus = false;
5516                 } else if (arg_transport == TRANSPORT_SSH) {
5517                         bus_connect_system_ssh(NULL, arg_host, &bus, &error);
5518                         private_bus = false;
5519                 } else
5520                         assert_not_reached("Uh, invalid transport...");
5521         }
5522
5523         switch (arg_action) {
5524
5525         case ACTION_SYSTEMCTL:
5526                 r = systemctl_main(bus, argc, argv, &error);
5527                 break;
5528
5529         case ACTION_HALT:
5530         case ACTION_POWEROFF:
5531         case ACTION_REBOOT:
5532         case ACTION_KEXEC:
5533                 r = halt_main(bus);
5534                 break;
5535
5536         case ACTION_RUNLEVEL2:
5537         case ACTION_RUNLEVEL3:
5538         case ACTION_RUNLEVEL4:
5539         case ACTION_RUNLEVEL5:
5540         case ACTION_RESCUE:
5541         case ACTION_EMERGENCY:
5542         case ACTION_DEFAULT:
5543                 r = start_with_fallback(bus);
5544                 break;
5545
5546         case ACTION_RELOAD:
5547         case ACTION_REEXEC:
5548                 r = reload_with_fallback(bus);
5549                 break;
5550
5551         case ACTION_CANCEL_SHUTDOWN: {
5552                 char *m = NULL;
5553
5554                 if (arg_wall) {
5555                         m = strv_join(arg_wall, " ");
5556                         if (!m) {
5557                                 retval = EXIT_FAILURE;
5558                                 goto finish;
5559                         }
5560                 }
5561                 r = send_shutdownd(arg_when, SD_SHUTDOWN_NONE, false, !arg_no_wall, m);
5562                 if (r < 0)
5563                         log_warning("Failed to talk to shutdownd, shutdown hasn't been cancelled: %s", strerror(-r));
5564                 free(m);
5565                 break;
5566         }
5567
5568         case ACTION_INVALID:
5569         case ACTION_RUNLEVEL:
5570         default:
5571                 assert_not_reached("Unknown action");
5572         }
5573
5574         retval = r < 0 ? EXIT_FAILURE : r;
5575
5576 finish:
5577         if (bus) {
5578                 dbus_connection_flush(bus);
5579                 dbus_connection_close(bus);
5580                 dbus_connection_unref(bus);
5581         }
5582
5583         dbus_shutdown();
5584
5585         strv_free(arg_property);
5586
5587         pager_close();
5588         ask_password_agent_close();
5589         polkit_agent_close();
5590
5591         return retval;
5592 }