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(false);
 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 const struct {
1522         const char *target;
1523         const char *verb;
1524         const char *mode;
1525 } action_table[_ACTION_MAX] = {
1526         [ACTION_HALT]         = { SPECIAL_HALT_TARGET,         "halt",         "replace-irreversibly" },
1527         [ACTION_POWEROFF]     = { SPECIAL_POWEROFF_TARGET,     "poweroff",     "replace-irreversibly" },
1528         [ACTION_REBOOT]       = { SPECIAL_REBOOT_TARGET,       "reboot",       "replace-irreversibly" },
1529         [ACTION_KEXEC]        = { SPECIAL_KEXEC_TARGET,        "kexec",        "replace-irreversibly" },
1530         [ACTION_RUNLEVEL2]    = { SPECIAL_RUNLEVEL2_TARGET,    NULL,           "isolate" },
1531         [ACTION_RUNLEVEL3]    = { SPECIAL_RUNLEVEL3_TARGET,    NULL,           "isolate" },
1532         [ACTION_RUNLEVEL4]    = { SPECIAL_RUNLEVEL4_TARGET,    NULL,           "isolate" },
1533         [ACTION_RUNLEVEL5]    = { SPECIAL_RUNLEVEL5_TARGET,    NULL,           "isolate" },
1534         [ACTION_RESCUE]       = { SPECIAL_RESCUE_TARGET,       "rescue",       "isolate" },
1535         [ACTION_EMERGENCY]    = { SPECIAL_EMERGENCY_TARGET,    "emergency",    "isolate" },
1536         [ACTION_DEFAULT]      = { SPECIAL_DEFAULT_TARGET,      "default",      "isolate" },
1537         [ACTION_EXIT]         = { SPECIAL_EXIT_TARGET,         "exit",         "replace-irreversibly" },
1538         [ACTION_SUSPEND]      = { SPECIAL_SUSPEND_TARGET,      "suspend",      "replace-irreversibly" },
1539         [ACTION_HIBERNATE]    = { SPECIAL_HIBERNATE_TARGET,    "hibernate",    "replace-irreversibly" },
1540         [ACTION_HYBRID_SLEEP] = { SPECIAL_HYBRID_SLEEP_TARGET, "hybrid-sleep", "replace-irreversibly" },
1541 };
1542
1543 static enum action verb_to_action(const char *verb) {
1544         enum action i;
1545
1546         for (i = ACTION_INVALID; i < _ACTION_MAX; i++)
1547                 if (action_table[i].verb && streq(verb, action_table[i].verb))
1548                         return i;
1549         return ACTION_INVALID;
1550 }
1551
1552 static int start_unit(DBusConnection *bus, char **args) {
1553
1554         int r, ret = 0;
1555         const char *method, *mode, *one_name;
1556         Set _cleanup_set_free_free_ *s = NULL;
1557         DBusError _cleanup_dbus_error_free_ error;
1558         char **name;
1559
1560         dbus_error_init(&error);
1561
1562         assert(bus);
1563
1564         ask_password_agent_open_if_enabled();
1565
1566         if (arg_action == ACTION_SYSTEMCTL) {
1567                 enum action action;
1568                 method =
1569                         streq(args[0], "stop") ||
1570                         streq(args[0], "condstop")              ? "StopUnit" :
1571                         streq(args[0], "reload")                ? "ReloadUnit" :
1572                         streq(args[0], "restart")               ? "RestartUnit" :
1573
1574                         streq(args[0], "try-restart")           ||
1575                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1576
1577                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1578
1579                         streq(args[0], "reload-or-try-restart") ||
1580                         streq(args[0], "condreload") ||
1581
1582                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1583                                                                   "StartUnit";
1584                 action = verb_to_action(args[0]);
1585
1586                 mode = streq(args[0], "isolate") ? "isolate" :
1587                        action_table[action].mode ?: arg_job_mode;
1588
1589                 one_name = action_table[action].target;
1590
1591         } else {
1592                 assert(arg_action < ELEMENTSOF(action_table));
1593                 assert(action_table[arg_action].target);
1594
1595                 method = "StartUnit";
1596
1597                 mode = action_table[arg_action].mode;
1598                 one_name = action_table[arg_action].target;
1599         }
1600
1601         if (!arg_no_block) {
1602                 ret = enable_wait_for_jobs(bus);
1603                 if (ret < 0) {
1604                         log_error("Could not watch jobs: %s", strerror(-ret));
1605                         return ret;
1606                 }
1607
1608                 s = set_new(string_hash_func, string_compare_func);
1609                 if (!s)
1610                         return log_oom();
1611         }
1612
1613         if (one_name) {
1614                 ret = start_unit_one(bus, method, one_name, mode, &error, s);
1615                 if (ret < 0)
1616                         ret = translate_bus_error_to_exit_status(ret, &error);
1617         } else {
1618                 STRV_FOREACH(name, args+1) {
1619                         r = start_unit_one(bus, method, *name, mode, &error, s);
1620                         if (r < 0) {
1621                                 ret = translate_bus_error_to_exit_status(r, &error);
1622                                 dbus_error_free(&error);
1623                         }
1624                 }
1625         }
1626
1627         if (!arg_no_block) {
1628                 r = wait_for_jobs(bus, s);
1629                 if (r < 0)
1630                         return r;
1631
1632                 /* When stopping units, warn if they can still be triggered by
1633                  * another active unit (socket, path, timer) */
1634                 if (!arg_quiet && streq(method, "StopUnit")) {
1635                         if (one_name)
1636                                 check_triggering_units(bus, one_name);
1637                         else
1638                                 STRV_FOREACH(name, args+1)
1639                                         check_triggering_units(bus, *name);
1640                 }
1641         }
1642
1643         return ret;
1644 }
1645
1646 /* Ask systemd-logind, which might grant access to unprivileged users
1647  * through PolicyKit */
1648 static int reboot_with_logind(DBusConnection *bus, enum action a) {
1649 #ifdef HAVE_LOGIND
1650         const char *method;
1651         dbus_bool_t interactive = true;
1652
1653         if (!bus)
1654                 return -EIO;
1655
1656         polkit_agent_open_if_enabled();
1657
1658         switch (a) {
1659
1660         case ACTION_REBOOT:
1661                 method = "Reboot";
1662                 break;
1663
1664         case ACTION_POWEROFF:
1665                 method = "PowerOff";
1666                 break;
1667
1668         case ACTION_SUSPEND:
1669                 method = "Suspend";
1670                 break;
1671
1672         case ACTION_HIBERNATE:
1673                 method = "Hibernate";
1674                 break;
1675
1676         case ACTION_HYBRID_SLEEP:
1677                 method = "HybridSleep";
1678                 break;
1679
1680         default:
1681                 return -EINVAL;
1682         }
1683
1684         return bus_method_call_with_reply(
1685                         bus,
1686                         "org.freedesktop.login1",
1687                         "/org/freedesktop/login1",
1688                         "org.freedesktop.login1.Manager",
1689                         method,
1690                         NULL,
1691                         NULL,
1692                         DBUS_TYPE_BOOLEAN, &interactive,
1693                         DBUS_TYPE_INVALID);
1694 #else
1695         return -ENOSYS;
1696 #endif
1697 }
1698
1699 static int check_inhibitors(DBusConnection *bus, enum action a) {
1700 #ifdef HAVE_LOGIND
1701         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1702         DBusMessageIter iter, sub, sub2;
1703         int r;
1704         unsigned c = 0;
1705         _cleanup_strv_free_ char **sessions = NULL;
1706         char **s;
1707
1708         if (!bus)
1709                 return 0;
1710
1711         if (arg_ignore_inhibitors || arg_force > 0)
1712                 return 0;
1713
1714         if (arg_when > 0)
1715                 return 0;
1716
1717         if (geteuid() == 0)
1718                 return 0;
1719
1720         if (!on_tty())
1721                 return 0;
1722
1723         r = bus_method_call_with_reply(
1724                         bus,
1725                         "org.freedesktop.login1",
1726                         "/org/freedesktop/login1",
1727                         "org.freedesktop.login1.Manager",
1728                         "ListInhibitors",
1729                         &reply,
1730                         NULL,
1731                         DBUS_TYPE_INVALID);
1732         if (r < 0)
1733                 /* If logind is not around, then there are no inhibitors... */
1734                 return 0;
1735
1736         if (!dbus_message_iter_init(reply, &iter) ||
1737             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1738             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) {
1739                 log_error("Failed to parse reply.");
1740                 return -EIO;
1741         }
1742
1743         dbus_message_iter_recurse(&iter, &sub);
1744         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1745                 const char *what, *who, *why, *mode;
1746                 uint32_t uid, pid;
1747                 _cleanup_strv_free_ char **sv = NULL;
1748                 _cleanup_free_ char *comm = NULL, *user = NULL;
1749
1750                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
1751                         log_error("Failed to parse reply.");
1752                         return -EIO;
1753                 }
1754
1755                 dbus_message_iter_recurse(&sub, &sub2);
1756
1757                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &what, true) < 0 ||
1758                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &who, true) < 0 ||
1759                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &why, true) < 0 ||
1760                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &mode, true) < 0 ||
1761                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &uid, true) < 0 ||
1762                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, false) < 0) {
1763                         log_error("Failed to parse reply.");
1764                         return -EIO;
1765                 }
1766
1767                 if (!streq(mode, "block"))
1768                         goto next;
1769
1770                 sv = strv_split(what, ":");
1771                 if (!sv)
1772                         return log_oom();
1773
1774                 if (!strv_contains(sv,
1775                                   a == ACTION_HALT ||
1776                                   a == ACTION_POWEROFF ||
1777                                   a == ACTION_REBOOT ||
1778                                   a == ACTION_KEXEC ? "shutdown" : "sleep"))
1779                         goto next;
1780
1781                 get_process_comm(pid, &comm);
1782                 user = uid_to_name(uid);
1783                 log_warning("Operation inhibited by \"%s\" (PID %lu \"%s\", user %s), reason is \"%s\".",
1784                             who, (unsigned long) pid, strna(comm), strna(user), why);
1785                 c++;
1786
1787         next:
1788                 dbus_message_iter_next(&sub);
1789         }
1790
1791         dbus_message_iter_recurse(&iter, &sub);
1792
1793         /* Check for current sessions */
1794         sd_get_sessions(&sessions);
1795         STRV_FOREACH(s, sessions) {
1796                 uid_t uid;
1797                 _cleanup_free_ char *type = NULL, *tty = NULL, *seat = NULL, *user = NULL, *service = NULL, *class = NULL;
1798
1799                 if (sd_session_get_uid(*s, &uid) < 0 || uid == getuid())
1800                         continue;
1801
1802                 if (sd_session_get_class(*s, &class) < 0 || !streq(class, "user"))
1803                         continue;
1804
1805                 if (sd_session_get_type(*s, &type) < 0 || (!streq(type, "x11") && !streq(type, "tty")))
1806                         continue;
1807
1808                 sd_session_get_tty(*s, &tty);
1809                 sd_session_get_seat(*s, &seat);
1810                 sd_session_get_service(*s, &service);
1811                 user = uid_to_name(uid);
1812
1813                 log_warning("User %s is logged in on %s.", strna(user), isempty(tty) ? (isempty(seat) ? strna(service) : seat) : tty);
1814                 c++;
1815         }
1816
1817         if (c <= 0)
1818                 return 0;
1819
1820         log_error("Please retry operation after closing inhibitors and logging out other users.\nAlternatively, ignore inhibitors and users with 'systemctl %s -i'.",
1821                   action_table[a].verb);
1822
1823         return -EPERM;
1824 #else
1825         return 0;
1826 #endif
1827 }
1828
1829 static int start_special(DBusConnection *bus, char **args) {
1830         enum action a;
1831         int r;
1832
1833         assert(args);
1834
1835         a = verb_to_action(args[0]);
1836
1837         r = check_inhibitors(bus, a);
1838         if (r < 0)
1839                 return r;
1840
1841         if (arg_force >= 2 && geteuid() != 0) {
1842                 log_error("Must be root.");
1843                 return -EPERM;
1844         }
1845
1846         if (arg_force >= 2 &&
1847             (a == ACTION_HALT ||
1848              a == ACTION_POWEROFF ||
1849              a == ACTION_REBOOT))
1850                 halt_now(a);
1851
1852         if (arg_force >= 1 &&
1853             (a == ACTION_HALT ||
1854              a == ACTION_POWEROFF ||
1855              a == ACTION_REBOOT ||
1856              a == ACTION_KEXEC ||
1857              a == ACTION_EXIT))
1858                 return daemon_reload(bus, args);
1859
1860         /* first try logind, to allow authentication with polkit */
1861         if (geteuid() != 0 &&
1862             (a == ACTION_POWEROFF ||
1863              a == ACTION_REBOOT ||
1864              a == ACTION_SUSPEND ||
1865              a == ACTION_HIBERNATE ||
1866              a == ACTION_HYBRID_SLEEP)) {
1867                 r = reboot_with_logind(bus, a);
1868                 if (r >= 0)
1869                         return r;
1870         }
1871
1872         r = start_unit(bus, args);
1873         if (r == EXIT_SUCCESS)
1874                 warn_wall(a);
1875
1876         return r;
1877 }
1878
1879 static int check_unit_active(DBusConnection *bus, char **args) {
1880         const char * const check_states[] = {
1881                 "active",
1882                 "reloading",
1883                 NULL
1884         };
1885
1886         char **name;
1887         int r = 3; /* According to LSB: "program is not running" */
1888
1889         assert(bus);
1890         assert(args);
1891
1892         STRV_FOREACH(name, args+1) {
1893                 int state;
1894
1895                 state = check_one_unit(bus, *name, (char**) check_states, arg_quiet);
1896                 if (state < 0)
1897                         return state;
1898                 if (state > 0)
1899                         r = 0;
1900         }
1901
1902         return r;
1903 }
1904
1905 static int check_unit_failed(DBusConnection *bus, char **args) {
1906         const char * const check_states[] = {
1907                 "failed",
1908                 NULL
1909         };
1910
1911         char **name;
1912         int r = 1;
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 kill_unit(DBusConnection *bus, char **args) {
1931         char **name;
1932         int r = 0;
1933
1934         assert(bus);
1935         assert(args);
1936
1937         if (!arg_kill_who)
1938                 arg_kill_who = "all";
1939
1940         STRV_FOREACH(name, args+1) {
1941                 _cleanup_free_ char *n = NULL;
1942
1943                 n = unit_name_mangle(*name);
1944                 if (!n)
1945                         return log_oom();
1946
1947                 r = bus_method_call_with_reply(
1948                                 bus,
1949                                 "org.freedesktop.systemd1",
1950                                 "/org/freedesktop/systemd1",
1951                                 "org.freedesktop.systemd1.Manager",
1952                                 "KillUnit",
1953                                 NULL,
1954                                 NULL,
1955                                 DBUS_TYPE_STRING, &n,
1956                                 DBUS_TYPE_STRING, &arg_kill_who,
1957                                 DBUS_TYPE_INT32, &arg_signal,
1958                                 DBUS_TYPE_INVALID);
1959                 if (r < 0)
1960                         return r;
1961         }
1962         return 0;
1963 }
1964
1965 static int set_cgroup(DBusConnection *bus, char **args) {
1966         _cleanup_free_ char *n = NULL;
1967         const char *method, *runtime;
1968         char **argument;
1969         int r;
1970
1971         assert(bus);
1972         assert(args);
1973
1974         method =
1975                 streq(args[0], "set-cgroup")   ? "SetUnitControlGroup" :
1976                 streq(args[0], "unset-cgroup") ? "UnsetUnitControlGroup"
1977                                                : "UnsetUnitControlGroupAttribute";
1978
1979         runtime = arg_runtime ? "runtime" : "persistent";
1980
1981         n = unit_name_mangle(args[1]);
1982         if (!n)
1983                 return log_oom();
1984
1985         STRV_FOREACH(argument, args + 2) {
1986
1987                 r = bus_method_call_with_reply(
1988                                 bus,
1989                                 "org.freedesktop.systemd1",
1990                                 "/org/freedesktop/systemd1",
1991                                 "org.freedesktop.systemd1.Manager",
1992                                 method,
1993                                 NULL,
1994                                 NULL,
1995                                 DBUS_TYPE_STRING, &n,
1996                                 DBUS_TYPE_STRING, argument,
1997                                 DBUS_TYPE_STRING, &runtime,
1998                                 DBUS_TYPE_INVALID);
1999                 if (r < 0)
2000                         return r;
2001         }
2002
2003         return 0;
2004 }
2005
2006 static int set_cgroup_attr(DBusConnection *bus, char **args) {
2007         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
2008         DBusError error;
2009         DBusMessageIter iter;
2010         _cleanup_free_ char *n = NULL;
2011         const char *runtime;
2012         int r;
2013
2014         assert(bus);
2015         assert(args);
2016
2017         dbus_error_init(&error);
2018
2019         runtime = arg_runtime ? "runtime" : "persistent";
2020
2021         n = unit_name_mangle(args[1]);
2022         if (!n)
2023                 return log_oom();
2024
2025         m = dbus_message_new_method_call(
2026                         "org.freedesktop.systemd1",
2027                         "/org/freedesktop/systemd1",
2028                         "org.freedesktop.systemd1.Manager",
2029                         "SetUnitControlGroupAttribute");
2030         if (!m)
2031                 return log_oom();
2032
2033         dbus_message_iter_init_append(m, &iter);
2034         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &n) ||
2035             !dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &args[2]))
2036                 return log_oom();
2037
2038         r = bus_append_strv_iter(&iter, args + 3);
2039         if (r < 0)
2040                 return log_oom();
2041
2042         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &runtime))
2043                 return log_oom();
2044
2045         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
2046         if (!reply) {
2047                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2048                 dbus_error_free(&error);
2049                 return -EIO;
2050         }
2051
2052         return 0;
2053 }
2054
2055 static int get_cgroup_attr(DBusConnection *bus, char **args) {
2056         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
2057         _cleanup_free_ char *n = NULL;
2058         char **argument;
2059         int r;
2060
2061         assert(bus);
2062         assert(args);
2063
2064         n = unit_name_mangle(args[1]);
2065         if (!n)
2066                 return log_oom();
2067
2068         STRV_FOREACH(argument, args + 2) {
2069                 _cleanup_strv_free_ char **list = NULL;
2070                 DBusMessageIter iter;
2071                 char **a;
2072
2073                 r = bus_method_call_with_reply(
2074                                 bus,
2075                                 "org.freedesktop.systemd1",
2076                                 "/org/freedesktop/systemd1",
2077                                 "org.freedesktop.systemd1.Manager",
2078                                 "GetUnitControlGroupAttribute",
2079                                 &reply,
2080                                 NULL,
2081                                 DBUS_TYPE_STRING, &n,
2082                                 DBUS_TYPE_STRING, argument,
2083                                 DBUS_TYPE_INVALID);
2084                 if (r < 0)
2085                         return r;
2086
2087                 if (!dbus_message_iter_init(reply, &iter)) {
2088                         log_error("Failed to initialize iterator.");
2089                         return -EIO;
2090                 }
2091
2092                 r = bus_parse_strv_iter(&iter, &list);
2093                 if (r < 0) {
2094                         log_error("Failed to parse value list.");
2095                         return r;
2096                 }
2097
2098                 STRV_FOREACH(a, list) {
2099                         if (endswith(*a, "\n"))
2100                                 fputs(*a, stdout);
2101                         else
2102                                 puts(*a);
2103                 }
2104         }
2105
2106         return 0;
2107 }
2108
2109 typedef struct ExecStatusInfo {
2110         char *name;
2111
2112         char *path;
2113         char **argv;
2114
2115         bool ignore;
2116
2117         usec_t start_timestamp;
2118         usec_t exit_timestamp;
2119         pid_t pid;
2120         int code;
2121         int status;
2122
2123         LIST_FIELDS(struct ExecStatusInfo, exec);
2124 } ExecStatusInfo;
2125
2126 static void exec_status_info_free(ExecStatusInfo *i) {
2127         assert(i);
2128
2129         free(i->name);
2130         free(i->path);
2131         strv_free(i->argv);
2132         free(i);
2133 }
2134
2135 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
2136         uint64_t start_timestamp, exit_timestamp, start_timestamp_monotonic, exit_timestamp_monotonic;
2137         DBusMessageIter sub2, sub3;
2138         const char*path;
2139         unsigned n;
2140         uint32_t pid;
2141         int32_t code, status;
2142         dbus_bool_t ignore;
2143
2144         assert(i);
2145         assert(i);
2146
2147         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
2148                 return -EIO;
2149
2150         dbus_message_iter_recurse(sub, &sub2);
2151
2152         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
2153                 return -EIO;
2154
2155         i->path = strdup(path);
2156         if (!i->path)
2157                 return -ENOMEM;
2158
2159         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
2160             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
2161                 return -EIO;
2162
2163         n = 0;
2164         dbus_message_iter_recurse(&sub2, &sub3);
2165         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
2166                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
2167                 dbus_message_iter_next(&sub3);
2168                 n++;
2169         }
2170
2171         i->argv = new0(char*, n+1);
2172         if (!i->argv)
2173                 return -ENOMEM;
2174
2175         n = 0;
2176         dbus_message_iter_recurse(&sub2, &sub3);
2177         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
2178                 const char *s;
2179
2180                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
2181                 dbus_message_iter_get_basic(&sub3, &s);
2182                 dbus_message_iter_next(&sub3);
2183
2184                 i->argv[n] = strdup(s);
2185                 if (!i->argv[n])
2186                         return -ENOMEM;
2187
2188                 n++;
2189         }
2190
2191         if (!dbus_message_iter_next(&sub2) ||
2192             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
2193             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
2194             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp_monotonic, true) < 0 ||
2195             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
2196             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp_monotonic, true) < 0 ||
2197             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
2198             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
2199             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
2200                 return -EIO;
2201
2202         i->ignore = ignore;
2203         i->start_timestamp = (usec_t) start_timestamp;
2204         i->exit_timestamp = (usec_t) exit_timestamp;
2205         i->pid = (pid_t) pid;
2206         i->code = code;
2207         i->status = status;
2208
2209         return 0;
2210 }
2211
2212 typedef struct UnitStatusInfo {
2213         const char *id;
2214         const char *load_state;
2215         const char *active_state;
2216         const char *sub_state;
2217         const char *unit_file_state;
2218
2219         const char *description;
2220         const char *following;
2221
2222         char **documentation;
2223
2224         const char *fragment_path;
2225         const char *source_path;
2226         const char *default_control_group;
2227
2228         const char *load_error;
2229         const char *result;
2230
2231         usec_t inactive_exit_timestamp;
2232         usec_t inactive_exit_timestamp_monotonic;
2233         usec_t active_enter_timestamp;
2234         usec_t active_exit_timestamp;
2235         usec_t inactive_enter_timestamp;
2236
2237         bool need_daemon_reload;
2238
2239         /* Service */
2240         pid_t main_pid;
2241         pid_t control_pid;
2242         const char *status_text;
2243         bool running:1;
2244
2245         usec_t start_timestamp;
2246         usec_t exit_timestamp;
2247
2248         int exit_code, exit_status;
2249
2250         usec_t condition_timestamp;
2251         bool condition_result;
2252
2253         /* Socket */
2254         unsigned n_accepted;
2255         unsigned n_connections;
2256         bool accept;
2257
2258         /* Device */
2259         const char *sysfs_path;
2260
2261         /* Mount, Automount */
2262         const char *where;
2263
2264         /* Swap */
2265         const char *what;
2266
2267         LIST_HEAD(ExecStatusInfo, exec);
2268 } UnitStatusInfo;
2269
2270 static void print_status_info(UnitStatusInfo *i) {
2271         ExecStatusInfo *p;
2272         const char *on, *off, *ss;
2273         usec_t timestamp;
2274         char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
2275         char since2[FORMAT_TIMESTAMP_MAX], *s2;
2276         const char *path;
2277         int flags =
2278                 arg_all * OUTPUT_SHOW_ALL |
2279                 (!on_tty() || pager_have()) * OUTPUT_FULL_WIDTH |
2280                 on_tty() * OUTPUT_COLOR |
2281                 !arg_quiet * OUTPUT_WARN_CUTOFF |
2282                 arg_full * OUTPUT_FULL_WIDTH;
2283
2284         assert(i);
2285
2286         /* This shows pretty information about a unit. See
2287          * print_property() for a low-level property printer */
2288
2289         printf("%s", strna(i->id));
2290
2291         if (i->description && !streq_ptr(i->id, i->description))
2292                 printf(" - %s", i->description);
2293
2294         printf("\n");
2295
2296         if (i->following)
2297                 printf("\t  Follow: unit currently follows state of %s\n", i->following);
2298
2299         if (streq_ptr(i->load_state, "error")) {
2300                 on = ansi_highlight_red(true);
2301                 off = ansi_highlight_red(false);
2302         } else
2303                 on = off = "";
2304
2305         path = i->source_path ? i->source_path : i->fragment_path;
2306
2307         if (i->load_error)
2308                 printf("\t  Loaded: %s%s%s (Reason: %s)\n", on, strna(i->load_state), off, i->load_error);
2309         else if (path && i->unit_file_state)
2310                 printf("\t  Loaded: %s%s%s (%s; %s)\n", on, strna(i->load_state), off, path, i->unit_file_state);
2311         else if (path)
2312                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, path);
2313         else
2314                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
2315
2316         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
2317
2318         if (streq_ptr(i->active_state, "failed")) {
2319                 on = ansi_highlight_red(true);
2320                 off = ansi_highlight_red(false);
2321         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
2322                 on = ansi_highlight_green(true);
2323                 off = ansi_highlight_green(false);
2324         } else
2325                 on = off = "";
2326
2327         if (ss)
2328                 printf("\t  Active: %s%s (%s)%s",
2329                        on,
2330                        strna(i->active_state),
2331                        ss,
2332                        off);
2333         else
2334                 printf("\t  Active: %s%s%s",
2335                        on,
2336                        strna(i->active_state),
2337                        off);
2338
2339         if (!isempty(i->result) && !streq(i->result, "success"))
2340                 printf(" (Result: %s)", i->result);
2341
2342         timestamp = (streq_ptr(i->active_state, "active")      ||
2343                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
2344                     (streq_ptr(i->active_state, "inactive")    ||
2345                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
2346                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
2347                                                                   i->active_exit_timestamp;
2348
2349         s1 = format_timestamp_relative(since1, sizeof(since1), timestamp);
2350         s2 = format_timestamp(since2, sizeof(since2), timestamp);
2351
2352         if (s1)
2353                 printf(" since %s; %s\n", s2, s1);
2354         else if (s2)
2355                 printf(" since %s\n", s2);
2356         else
2357                 printf("\n");
2358
2359         if (!i->condition_result && i->condition_timestamp > 0) {
2360                 s1 = format_timestamp_relative(since1, sizeof(since1), i->condition_timestamp);
2361                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
2362
2363                 if (s1)
2364                         printf("\t          start condition failed at %s; %s\n", s2, s1);
2365                 else if (s2)
2366                         printf("\t          start condition failed at %s\n", s2);
2367         }
2368
2369         if (i->sysfs_path)
2370                 printf("\t  Device: %s\n", i->sysfs_path);
2371         if (i->where)
2372                 printf("\t   Where: %s\n", i->where);
2373         if (i->what)
2374                 printf("\t    What: %s\n", i->what);
2375
2376         if (!strv_isempty(i->documentation)) {
2377                 char **t;
2378                 bool first = true;
2379
2380                 STRV_FOREACH(t, i->documentation) {
2381                         if (first) {
2382                                 printf("\t    Docs: %s\n", *t);
2383                                 first = false;
2384                         } else
2385                                 printf("\t          %s\n", *t);
2386                 }
2387         }
2388
2389         if (i->accept)
2390                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
2391
2392         LIST_FOREACH(exec, p, i->exec) {
2393                 _cleanup_free_ char *t = NULL;
2394                 bool good;
2395
2396                 /* Only show exited processes here */
2397                 if (p->code == 0)
2398                         continue;
2399
2400                 t = strv_join(p->argv, " ");
2401                 printf("\t Process: %u %s=%s ", p->pid, p->name, strna(t));
2402
2403                 good = is_clean_exit_lsb(p->code, p->status, NULL);
2404                 if (!good) {
2405                         on = ansi_highlight_red(true);
2406                         off = ansi_highlight_red(false);
2407                 } else
2408                         on = off = "";
2409
2410                 printf("%s(code=%s, ", on, sigchld_code_to_string(p->code));
2411
2412                 if (p->code == CLD_EXITED) {
2413                         const char *c;
2414
2415                         printf("status=%i", p->status);
2416
2417                         c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD);
2418                         if (c)
2419                                 printf("/%s", c);
2420
2421                 } else
2422                         printf("signal=%s", signal_to_string(p->status));
2423
2424                 printf(")%s\n", off);
2425
2426                 if (i->main_pid == p->pid &&
2427                     i->start_timestamp == p->start_timestamp &&
2428                     i->exit_timestamp == p->start_timestamp)
2429                         /* Let's not show this twice */
2430                         i->main_pid = 0;
2431
2432                 if (p->pid == i->control_pid)
2433                         i->control_pid = 0;
2434         }
2435
2436         if (i->main_pid > 0 || i->control_pid > 0) {
2437                 printf("\t");
2438
2439                 if (i->main_pid > 0) {
2440                         printf("Main PID: %u", (unsigned) i->main_pid);
2441
2442                         if (i->running) {
2443                                 _cleanup_free_ char *t = NULL;
2444                                 get_process_comm(i->main_pid, &t);
2445                                 if (t)
2446                                         printf(" (%s)", t);
2447                         } else if (i->exit_code > 0) {
2448                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
2449
2450                                 if (i->exit_code == CLD_EXITED) {
2451                                         const char *c;
2452
2453                                         printf("status=%i", i->exit_status);
2454
2455                                         c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD);
2456                                         if (c)
2457                                                 printf("/%s", c);
2458
2459                                 } else
2460                                         printf("signal=%s", signal_to_string(i->exit_status));
2461                                 printf(")");
2462                         }
2463                 }
2464
2465                 if (i->main_pid > 0 && i->control_pid > 0)
2466                         printf(";");
2467
2468                 if (i->control_pid > 0) {
2469                         _cleanup_free_ char *t = NULL;
2470
2471                         printf(" Control: %u", (unsigned) i->control_pid);
2472
2473                         get_process_comm(i->control_pid, &t);
2474                         if (t)
2475                                 printf(" (%s)", t);
2476                 }
2477
2478                 printf("\n");
2479         }
2480
2481         if (i->status_text)
2482                 printf("\t  Status: \"%s\"\n", i->status_text);
2483
2484         if (i->default_control_group &&
2485             (i->main_pid > 0 || i->control_pid > 0 || cg_is_empty_by_spec(i->default_control_group, false) == 0)) {
2486                 unsigned c;
2487
2488                 printf("\t  CGroup: %s\n", i->default_control_group);
2489
2490                 if (arg_transport != TRANSPORT_SSH) {
2491                         unsigned k = 0;
2492                         pid_t extra[2];
2493
2494                         c = columns();
2495                         if (c > 18)
2496                                 c -= 18;
2497                         else
2498                                 c = 0;
2499
2500                         if (i->main_pid > 0)
2501                                 extra[k++] = i->main_pid;
2502
2503                         if (i->control_pid > 0)
2504                                 extra[k++] = i->control_pid;
2505
2506                         show_cgroup_and_extra_by_spec(i->default_control_group, "\t\t  ", c, false, extra, k, flags);
2507                 }
2508         }
2509
2510         if (i->id && arg_transport != TRANSPORT_SSH) {
2511                 printf("\n");
2512                 if(arg_scope == UNIT_FILE_SYSTEM)
2513                         show_journal_by_unit(stdout,
2514                                              i->id,
2515                                              arg_output,
2516                                              0,
2517                                              i->inactive_exit_timestamp_monotonic,
2518                                              arg_lines,
2519                                              flags);
2520                 else
2521                         show_journal_by_user_unit(stdout,
2522                                                   i->id,
2523                                                   arg_output,
2524                                                   0,
2525                                                   i->inactive_exit_timestamp_monotonic,
2526                                                   arg_lines,
2527                                                   getuid(),
2528                                                   flags);
2529         }
2530
2531         if (i->need_daemon_reload)
2532                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
2533                        ansi_highlight_red(true),
2534                        ansi_highlight_red(false),
2535                        arg_scope == UNIT_FILE_SYSTEM ? "--system" : "--user");
2536 }
2537
2538 static void show_unit_help(UnitStatusInfo *i) {
2539         char **p;
2540
2541         assert(i);
2542
2543         if (!i->documentation) {
2544                 log_info("Documentation for %s not known.", i->id);
2545                 return;
2546         }
2547
2548         STRV_FOREACH(p, i->documentation) {
2549
2550                 if (startswith(*p, "man:")) {
2551                         size_t k;
2552                         char *e = NULL;
2553                         char _cleanup_free_ *page = NULL, *section = NULL;
2554                         const char *args[4] = { "man", NULL, NULL, NULL };
2555                         pid_t pid;
2556
2557                         k = strlen(*p);
2558
2559                         if ((*p)[k-1] == ')')
2560                                 e = strrchr(*p, '(');
2561
2562                         if (e) {
2563                                 page = strndup((*p) + 4, e - *p - 4);
2564                                 section = strndup(e + 1, *p + k - e - 2);
2565                                 if (!page || !section) {
2566                                         log_oom();
2567                                         return;
2568                                 }
2569
2570                                 args[1] = section;
2571                                 args[2] = page;
2572                         } else
2573                                 args[1] = *p + 4;
2574
2575                         pid = fork();
2576                         if (pid < 0) {
2577                                 log_error("Failed to fork: %m");
2578                                 continue;
2579                         }
2580
2581                         if (pid == 0) {
2582                                 /* Child */
2583                                 execvp(args[0], (char**) args);
2584                                 log_error("Failed to execute man: %m");
2585                                 _exit(EXIT_FAILURE);
2586                         }
2587
2588                         wait_for_terminate(pid, NULL);
2589                 } else
2590                         log_info("Can't show: %s", *p);
2591         }
2592 }
2593
2594 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
2595
2596         assert(name);
2597         assert(iter);
2598         assert(i);
2599
2600         switch (dbus_message_iter_get_arg_type(iter)) {
2601
2602         case DBUS_TYPE_STRING: {
2603                 const char *s;
2604
2605                 dbus_message_iter_get_basic(iter, &s);
2606
2607                 if (!isempty(s)) {
2608                         if (streq(name, "Id"))
2609                                 i->id = s;
2610                         else if (streq(name, "LoadState"))
2611                                 i->load_state = s;
2612                         else if (streq(name, "ActiveState"))
2613                                 i->active_state = s;
2614                         else if (streq(name, "SubState"))
2615                                 i->sub_state = s;
2616                         else if (streq(name, "Description"))
2617                                 i->description = s;
2618                         else if (streq(name, "FragmentPath"))
2619                                 i->fragment_path = s;
2620                         else if (streq(name, "SourcePath"))
2621                                 i->source_path = s;
2622                         else if (streq(name, "DefaultControlGroup"))
2623                                 i->default_control_group = s;
2624                         else if (streq(name, "StatusText"))
2625                                 i->status_text = s;
2626                         else if (streq(name, "SysFSPath"))
2627                                 i->sysfs_path = s;
2628                         else if (streq(name, "Where"))
2629                                 i->where = s;
2630                         else if (streq(name, "What"))
2631                                 i->what = s;
2632                         else if (streq(name, "Following"))
2633                                 i->following = s;
2634                         else if (streq(name, "UnitFileState"))
2635                                 i->unit_file_state = s;
2636                         else if (streq(name, "Result"))
2637                                 i->result = s;
2638                 }
2639
2640                 break;
2641         }
2642
2643         case DBUS_TYPE_BOOLEAN: {
2644                 dbus_bool_t b;
2645
2646                 dbus_message_iter_get_basic(iter, &b);
2647
2648                 if (streq(name, "Accept"))
2649                         i->accept = b;
2650                 else if (streq(name, "NeedDaemonReload"))
2651                         i->need_daemon_reload = b;
2652                 else if (streq(name, "ConditionResult"))
2653                         i->condition_result = b;
2654
2655                 break;
2656         }
2657
2658         case DBUS_TYPE_UINT32: {
2659                 uint32_t u;
2660
2661                 dbus_message_iter_get_basic(iter, &u);
2662
2663                 if (streq(name, "MainPID")) {
2664                         if (u > 0) {
2665                                 i->main_pid = (pid_t) u;
2666                                 i->running = true;
2667                         }
2668                 } else if (streq(name, "ControlPID"))
2669                         i->control_pid = (pid_t) u;
2670                 else if (streq(name, "ExecMainPID")) {
2671                         if (u > 0)
2672                                 i->main_pid = (pid_t) u;
2673                 } else if (streq(name, "NAccepted"))
2674                         i->n_accepted = u;
2675                 else if (streq(name, "NConnections"))
2676                         i->n_connections = u;
2677
2678                 break;
2679         }
2680
2681         case DBUS_TYPE_INT32: {
2682                 int32_t j;
2683
2684                 dbus_message_iter_get_basic(iter, &j);
2685
2686                 if (streq(name, "ExecMainCode"))
2687                         i->exit_code = (int) j;
2688                 else if (streq(name, "ExecMainStatus"))
2689                         i->exit_status = (int) j;
2690
2691                 break;
2692         }
2693
2694         case DBUS_TYPE_UINT64: {
2695                 uint64_t u;
2696
2697                 dbus_message_iter_get_basic(iter, &u);
2698
2699                 if (streq(name, "ExecMainStartTimestamp"))
2700                         i->start_timestamp = (usec_t) u;
2701                 else if (streq(name, "ExecMainExitTimestamp"))
2702                         i->exit_timestamp = (usec_t) u;
2703                 else if (streq(name, "ActiveEnterTimestamp"))
2704                         i->active_enter_timestamp = (usec_t) u;
2705                 else if (streq(name, "InactiveEnterTimestamp"))
2706                         i->inactive_enter_timestamp = (usec_t) u;
2707                 else if (streq(name, "InactiveExitTimestamp"))
2708                         i->inactive_exit_timestamp = (usec_t) u;
2709                 else if (streq(name, "InactiveExitTimestampMonotonic"))
2710                         i->inactive_exit_timestamp_monotonic = (usec_t) u;
2711                 else if (streq(name, "ActiveExitTimestamp"))
2712                         i->active_exit_timestamp = (usec_t) u;
2713                 else if (streq(name, "ConditionTimestamp"))
2714                         i->condition_timestamp = (usec_t) u;
2715
2716                 break;
2717         }
2718
2719         case DBUS_TYPE_ARRAY: {
2720
2721                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
2722                     startswith(name, "Exec")) {
2723                         DBusMessageIter sub;
2724
2725                         dbus_message_iter_recurse(iter, &sub);
2726                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2727                                 ExecStatusInfo *info;
2728                                 int r;
2729
2730                                 if (!(info = new0(ExecStatusInfo, 1)))
2731                                         return -ENOMEM;
2732
2733                                 if (!(info->name = strdup(name))) {
2734                                         free(info);
2735                                         return -ENOMEM;
2736                                 }
2737
2738                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
2739                                         free(info);
2740                                         return r;
2741                                 }
2742
2743                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
2744
2745                                 dbus_message_iter_next(&sub);
2746                         }
2747                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING &&
2748                            streq(name, "Documentation")) {
2749
2750                         DBusMessageIter sub;
2751
2752                         dbus_message_iter_recurse(iter, &sub);
2753                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING) {
2754                                 const char *s;
2755                                 char **l;
2756
2757                                 dbus_message_iter_get_basic(&sub, &s);
2758
2759                                 l = strv_append(i->documentation, s);
2760                                 if (!l)
2761                                         return -ENOMEM;
2762
2763                                 strv_free(i->documentation);
2764                                 i->documentation = l;
2765
2766                                 dbus_message_iter_next(&sub);
2767                         }
2768                 }
2769
2770                 break;
2771         }
2772
2773         case DBUS_TYPE_STRUCT: {
2774
2775                 if (streq(name, "LoadError")) {
2776                         DBusMessageIter sub;
2777                         const char *n, *message;
2778                         int r;
2779
2780                         dbus_message_iter_recurse(iter, &sub);
2781
2782                         r = bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &n, true);
2783                         if (r < 0)
2784                                 return r;
2785
2786                         r = bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &message, false);
2787                         if (r < 0)
2788                                 return r;
2789
2790                         if (!isempty(message))
2791                                 i->load_error = message;
2792                 }
2793
2794                 break;
2795         }
2796         }
2797
2798         return 0;
2799 }
2800
2801 static int print_property(const char *name, DBusMessageIter *iter) {
2802         assert(name);
2803         assert(iter);
2804
2805         /* This is a low-level property printer, see
2806          * print_status_info() for the nicer output */
2807
2808         if (arg_property && !strv_find(arg_property, name))
2809                 return 0;
2810
2811         switch (dbus_message_iter_get_arg_type(iter)) {
2812
2813         case DBUS_TYPE_STRUCT: {
2814                 DBusMessageIter sub;
2815                 dbus_message_iter_recurse(iter, &sub);
2816
2817                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
2818                         uint32_t u;
2819
2820                         dbus_message_iter_get_basic(&sub, &u);
2821
2822                         if (u)
2823                                 printf("%s=%u\n", name, (unsigned) u);
2824                         else if (arg_all)
2825                                 printf("%s=\n", name);
2826
2827                         return 0;
2828                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
2829                         const char *s;
2830
2831                         dbus_message_iter_get_basic(&sub, &s);
2832
2833                         if (arg_all || s[0])
2834                                 printf("%s=%s\n", name, s);
2835
2836                         return 0;
2837                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "LoadError")) {
2838                         const char *a = NULL, *b = NULL;
2839
2840                         if (bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &a, true) >= 0)
2841                                 bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &b, false);
2842
2843                         if (arg_all || !isempty(a) || !isempty(b))
2844                                 printf("%s=%s \"%s\"\n", name, strempty(a), strempty(b));
2845
2846                         return 0;
2847                 }
2848
2849                 break;
2850         }
2851
2852         case DBUS_TYPE_ARRAY:
2853
2854                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
2855                         DBusMessageIter sub, sub2;
2856
2857                         dbus_message_iter_recurse(iter, &sub);
2858                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2859                                 const char *path;
2860                                 dbus_bool_t ignore;
2861
2862                                 dbus_message_iter_recurse(&sub, &sub2);
2863
2864                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
2865                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
2866                                         printf("EnvironmentFile=%s (ignore_errors=%s)\n", path, yes_no(ignore));
2867
2868                                 dbus_message_iter_next(&sub);
2869                         }
2870
2871                         return 0;
2872
2873                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2874                         DBusMessageIter sub, sub2;
2875
2876                         dbus_message_iter_recurse(iter, &sub);
2877                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2878                                 const char *type, *path;
2879
2880                                 dbus_message_iter_recurse(&sub, &sub2);
2881
2882                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2883                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2884                                         printf("%s=%s\n", type, path);
2885
2886                                 dbus_message_iter_next(&sub);
2887                         }
2888
2889                         return 0;
2890
2891                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2892                         DBusMessageIter sub, sub2;
2893
2894                         dbus_message_iter_recurse(iter, &sub);
2895                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2896                                 const char *base;
2897                                 uint64_t value, next_elapse;
2898
2899                                 dbus_message_iter_recurse(&sub, &sub2);
2900
2901                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2902                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2903                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2904                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2905
2906                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2907                                                base,
2908                                                format_timespan(timespan1, sizeof(timespan1), value),
2909                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2910                                 }
2911
2912                                 dbus_message_iter_next(&sub);
2913                         }
2914
2915                         return 0;
2916
2917                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "ControlGroupAttributes")) {
2918                         DBusMessageIter sub, sub2;
2919
2920                         dbus_message_iter_recurse(iter, &sub);
2921                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2922                                 const char *controller, *attr, *value;
2923
2924                                 dbus_message_iter_recurse(&sub, &sub2);
2925
2926                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &controller, true) >= 0 &&
2927                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &attr, true) >= 0 &&
2928                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &value, false) >= 0) {
2929
2930                                         printf("ControlGroupAttributes={ controller=%s ; attribute=%s ; value=\"%s\" }\n",
2931                                                controller,
2932                                                attr,
2933                                                value);
2934                                 }
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 && startswith(name, "Exec")) {
2942                         DBusMessageIter sub;
2943
2944                         dbus_message_iter_recurse(iter, &sub);
2945                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2946                                 ExecStatusInfo info;
2947
2948                                 zero(info);
2949                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2950                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2951                                         char _cleanup_free_ *t;
2952
2953                                         t = strv_join(info.argv, " ");
2954
2955                                         printf("%s={ path=%s ; argv[]=%s ; ignore_errors=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2956                                                name,
2957                                                strna(info.path),
2958                                                strna(t),
2959                                                yes_no(info.ignore),
2960                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2961                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2962                                                (unsigned) info. pid,
2963                                                sigchld_code_to_string(info.code),
2964                                                info.status,
2965                                                info.code == CLD_EXITED ? "" : "/",
2966                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2967                                 }
2968
2969                                 free(info.path);
2970                                 strv_free(info.argv);
2971
2972                                 dbus_message_iter_next(&sub);
2973                         }
2974
2975                         return 0;
2976                 }
2977
2978                 break;
2979         }
2980
2981         if (generic_print_property(name, iter, arg_all) > 0)
2982                 return 0;
2983
2984         if (arg_all)
2985                 printf("%s=[unprintable]\n", name);
2986
2987         return 0;
2988 }
2989
2990 static int show_one(const char *verb, DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2991         _cleanup_free_ DBusMessage *reply = NULL;
2992         const char *interface = "";
2993         int r;
2994         DBusMessageIter iter, sub, sub2, sub3;
2995         UnitStatusInfo info;
2996         ExecStatusInfo *p;
2997
2998         assert(path);
2999         assert(new_line);
3000
3001         zero(info);
3002
3003         r = bus_method_call_with_reply(
3004                         bus,
3005                         "org.freedesktop.systemd1",
3006                         path,
3007                         "org.freedesktop.DBus.Properties",
3008                         "GetAll",
3009                         &reply,
3010                         NULL,
3011                         DBUS_TYPE_STRING, &interface,
3012                         DBUS_TYPE_INVALID);
3013         if (r < 0)
3014                 return r;
3015
3016         if (!dbus_message_iter_init(reply, &iter) ||
3017             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
3018             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
3019                 log_error("Failed to parse reply.");
3020                 return -EIO;
3021         }
3022
3023         dbus_message_iter_recurse(&iter, &sub);
3024
3025         if (*new_line)
3026                 printf("\n");
3027
3028         *new_line = true;
3029
3030         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
3031                 const char *name;
3032
3033                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_DICT_ENTRY);
3034                 dbus_message_iter_recurse(&sub, &sub2);
3035
3036                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
3037                     dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT) {
3038                         log_error("Failed to parse reply.");
3039                         return -EIO;
3040                 }
3041
3042                 dbus_message_iter_recurse(&sub2, &sub3);
3043
3044                 if (show_properties)
3045                         r = print_property(name, &sub3);
3046                 else
3047                         r = status_property(name, &sub3, &info);
3048                 if (r < 0) {
3049                         log_error("Failed to parse reply.");
3050                         return -EIO;
3051                 }
3052
3053                 dbus_message_iter_next(&sub);
3054         }
3055
3056         r = 0;
3057
3058         if (!show_properties) {
3059                 if (streq(verb, "help"))
3060                         show_unit_help(&info);
3061                 else
3062                         print_status_info(&info);
3063         }
3064
3065         strv_free(info.documentation);
3066
3067         if (!streq_ptr(info.active_state, "active") &&
3068             !streq_ptr(info.active_state, "reloading") &&
3069             streq(verb, "status"))
3070                 /* According to LSB: "program not running" */
3071                 r = 3;
3072
3073         while ((p = info.exec)) {
3074                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
3075                 exec_status_info_free(p);
3076         }
3077
3078         return r;
3079 }
3080
3081 static int show_one_by_pid(const char *verb, DBusConnection *bus, uint32_t pid, bool *new_line) {
3082         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3083         const char *path = NULL;
3084         DBusError _cleanup_dbus_error_free_ error;
3085         int r;
3086
3087         dbus_error_init(&error);
3088
3089         r = bus_method_call_with_reply(
3090                         bus,
3091                         "org.freedesktop.systemd1",
3092                         "/org/freedesktop/systemd1",
3093                         "org.freedesktop.systemd1.Manager",
3094                         "GetUnitByPID",
3095                         &reply,
3096                         NULL,
3097                         DBUS_TYPE_UINT32, &pid,
3098                         DBUS_TYPE_INVALID);
3099         if (r < 0)
3100                 return r;
3101
3102         if (!dbus_message_get_args(reply, &error,
3103                                    DBUS_TYPE_OBJECT_PATH, &path,
3104                                    DBUS_TYPE_INVALID)) {
3105                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3106                 return -EIO;
3107         }
3108
3109         r = show_one(verb, bus, path, false, new_line);
3110         return r;
3111 }
3112
3113 static int show_all(const char* verb, DBusConnection *bus, bool show_properties, bool *new_line) {
3114         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3115         _cleanup_free_ struct unit_info *unit_infos = NULL;
3116         unsigned c = 0;
3117         const struct unit_info *u;
3118         int r;
3119
3120         r = get_unit_list(bus, &reply, &unit_infos, &c);
3121         if (r < 0)
3122                 return r;
3123
3124         for (u = unit_infos; u < unit_infos + c; u++) {
3125                 char _cleanup_free_ *p = NULL;
3126
3127                 if (!output_show_unit(u))
3128                         continue;
3129
3130                 p = unit_dbus_path_from_name(u->id);
3131                 if (!p)
3132                         return log_oom();
3133
3134                 printf("%s -> '%s'\n", u->id, p);
3135
3136                 r = show_one(verb, bus, p, show_properties, new_line);
3137                 if (r != 0)
3138                         return r;
3139         }
3140
3141         return 0;
3142 }
3143
3144 static int show(DBusConnection *bus, char **args) {
3145         int r, ret = 0;
3146         bool show_properties, show_status, new_line = false;
3147         char **name;
3148
3149         assert(bus);
3150         assert(args);
3151
3152         show_properties = streq(args[0], "show");
3153         show_status = streq(args[0], "status");
3154
3155         if (show_properties)
3156                 pager_open_if_enabled();
3157
3158         /* If no argument is specified inspect the manager itself */
3159
3160         if (show_properties && strv_length(args) <= 1)
3161                 return show_one(args[0], bus, "/org/freedesktop/systemd1", show_properties, &new_line);
3162
3163         if (show_status && strv_length(args) <= 1)
3164                 return show_all(args[0], bus, false, &new_line);
3165
3166         STRV_FOREACH(name, args+1) {
3167                 uint32_t id;
3168
3169                 if (safe_atou32(*name, &id) < 0) {
3170                         _cleanup_free_ char *p = NULL, *n = NULL;
3171                         /* Interpret as unit name */
3172
3173                         n = unit_name_mangle(*name);
3174                         if (!n)
3175                                 return log_oom();
3176
3177                         p = unit_dbus_path_from_name(n);
3178                         if (!p)
3179                                 return log_oom();
3180
3181                         r = show_one(args[0], bus, p, show_properties, &new_line);
3182                         if (r != 0)
3183                                 ret = r;
3184
3185                 } else if (show_properties) {
3186                         _cleanup_free_ char *p = NULL;
3187
3188                         /* Interpret as job id */
3189                         if (asprintf(&p, "/org/freedesktop/systemd1/job/%u", id) < 0)
3190                                 return log_oom();
3191
3192                         r = show_one(args[0], bus, p, show_properties, &new_line);
3193                         if (r != 0)
3194                                 ret = r;
3195
3196                 } else {
3197                         /* Interpret as PID */
3198                         r = show_one_by_pid(args[0], bus, id, &new_line);
3199                         if (r != 0)
3200                                 ret = r;
3201                 }
3202         }
3203
3204         return ret;
3205 }
3206
3207 static int dump(DBusConnection *bus, char **args) {
3208         _cleanup_free_ DBusMessage *reply = NULL;
3209         DBusError error;
3210         int r;
3211         const char *text;
3212
3213         dbus_error_init(&error);
3214
3215         pager_open_if_enabled();
3216
3217         r = bus_method_call_with_reply(
3218                         bus,
3219                         "org.freedesktop.systemd1",
3220                         "/org/freedesktop/systemd1",
3221                         "org.freedesktop.systemd1.Manager",
3222                         "Dump",
3223                         &reply,
3224                         NULL,
3225                         DBUS_TYPE_INVALID);
3226         if (r < 0)
3227                 return r;
3228
3229         if (!dbus_message_get_args(reply, &error,
3230                                    DBUS_TYPE_STRING, &text,
3231                                    DBUS_TYPE_INVALID)) {
3232                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3233                 dbus_error_free(&error);
3234                 return  -EIO;
3235         }
3236
3237         fputs(text, stdout);
3238         return 0;
3239 }
3240
3241 static int snapshot(DBusConnection *bus, char **args) {
3242         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3243         DBusError error;
3244         int r;
3245         dbus_bool_t cleanup = FALSE;
3246         DBusMessageIter iter, sub;
3247         const char
3248                 *path, *id,
3249                 *interface = "org.freedesktop.systemd1.Unit",
3250                 *property = "Id";
3251         _cleanup_free_ char *n = NULL;
3252
3253         dbus_error_init(&error);
3254
3255         if (strv_length(args) > 1)
3256                 n = snapshot_name_mangle(args[1]);
3257         else
3258                 n = strdup("");
3259         if (!n)
3260                 return log_oom();
3261
3262         r = bus_method_call_with_reply (
3263                         bus,
3264                         "org.freedesktop.systemd1",
3265                         "/org/freedesktop/systemd1",
3266                         "org.freedesktop.systemd1.Manager",
3267                         "CreateSnapshot",
3268                         &reply,
3269                         NULL,
3270                         DBUS_TYPE_STRING, &n,
3271                         DBUS_TYPE_BOOLEAN, &cleanup,
3272                         DBUS_TYPE_INVALID);
3273         if (r < 0)
3274                 return r;
3275
3276         if (!dbus_message_get_args(reply, &error,
3277                                    DBUS_TYPE_OBJECT_PATH, &path,
3278                                    DBUS_TYPE_INVALID)) {
3279                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3280                 dbus_error_free(&error);
3281                 return -EIO;
3282         }
3283
3284         dbus_message_unref(reply);
3285         reply = NULL;
3286
3287         r = bus_method_call_with_reply (
3288                         bus,
3289                         "org.freedesktop.systemd1",
3290                         path,
3291                         "org.freedesktop.DBus.Properties",
3292                         "Get",
3293                         &reply,
3294                         NULL,
3295                         DBUS_TYPE_STRING, &interface,
3296                         DBUS_TYPE_STRING, &property,
3297                         DBUS_TYPE_INVALID);
3298         if (r < 0)
3299                 return r;
3300
3301         if (!dbus_message_iter_init(reply, &iter) ||
3302             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3303                 log_error("Failed to parse reply.");
3304                 return -EIO;
3305         }
3306
3307         dbus_message_iter_recurse(&iter, &sub);
3308
3309         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
3310                 log_error("Failed to parse reply.");
3311                 return -EIO;
3312         }
3313
3314         dbus_message_iter_get_basic(&sub, &id);
3315
3316         if (!arg_quiet)
3317                 puts(id);
3318
3319         return 0;
3320 }
3321
3322 static int delete_snapshot(DBusConnection *bus, char **args) {
3323         char **name;
3324
3325         assert(args);
3326
3327         STRV_FOREACH(name, args+1) {
3328                 _cleanup_free_ char *n = NULL;
3329                 int r;
3330
3331                 n = snapshot_name_mangle(*name);
3332                 if (!n)
3333                         return log_oom();
3334
3335                 r = bus_method_call_with_reply(
3336                                 bus,
3337                                 "org.freedesktop.systemd1",
3338                                 "/org/freedesktop/systemd1",
3339                                 "org.freedesktop.systemd1.Manager",
3340                                 "RemoveSnapshot",
3341                                 NULL,
3342                                 NULL,
3343                                 DBUS_TYPE_STRING, &n,
3344                                 DBUS_TYPE_INVALID);
3345                 if (r < 0)
3346                         return r;
3347         }
3348
3349         return 0;
3350 }
3351
3352 static int daemon_reload(DBusConnection *bus, char **args) {
3353         int r;
3354         const char *method;
3355         DBusError error;
3356
3357         if (arg_action == ACTION_RELOAD)
3358                 method = "Reload";
3359         else if (arg_action == ACTION_REEXEC)
3360                 method = "Reexecute";
3361         else {
3362                 assert(arg_action == ACTION_SYSTEMCTL);
3363
3364                 method =
3365                         streq(args[0], "clear-jobs")    ||
3366                         streq(args[0], "cancel")        ? "ClearJobs" :
3367                         streq(args[0], "daemon-reexec") ? "Reexecute" :
3368                         streq(args[0], "reset-failed")  ? "ResetFailed" :
3369                         streq(args[0], "halt")          ? "Halt" :
3370                         streq(args[0], "poweroff")      ? "PowerOff" :
3371                         streq(args[0], "reboot")        ? "Reboot" :
3372                         streq(args[0], "kexec")         ? "KExec" :
3373                         streq(args[0], "exit")          ? "Exit" :
3374                                     /* "daemon-reload" */ "Reload";
3375         }
3376
3377         r = bus_method_call_with_reply(
3378                         bus,
3379                         "org.freedesktop.systemd1",
3380                         "/org/freedesktop/systemd1",
3381                         "org.freedesktop.systemd1.Manager",
3382                         method,
3383                         NULL,
3384                         &error,
3385                         DBUS_TYPE_INVALID);
3386
3387         if (r == -ENOENT && arg_action != ACTION_SYSTEMCTL)
3388                 /* There's always a fallback possible for
3389                  * legacy actions. */
3390                 r = -EADDRNOTAVAIL;
3391         else if (r == -ETIMEDOUT && streq(method, "Reexecute"))
3392                 /* On reexecution, we expect a disconnect, not
3393                  * a reply */
3394                 r = 0;
3395         else if (r < 0)
3396                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3397
3398         dbus_error_free(&error);
3399         return r;
3400 }
3401
3402 static int reset_failed(DBusConnection *bus, char **args) {
3403         int r = 0;
3404         char **name;
3405
3406         if (strv_length(args) <= 1)
3407                 return daemon_reload(bus, args);
3408
3409         STRV_FOREACH(name, args+1) {
3410                 _cleanup_free_ char *n;
3411
3412                 n = unit_name_mangle(*name);
3413                 if (!n)
3414                         return log_oom();
3415
3416                 r = bus_method_call_with_reply(
3417                                 bus,
3418                                 "org.freedesktop.systemd1",
3419                                 "/org/freedesktop/systemd1",
3420                                 "org.freedesktop.systemd1.Manager",
3421                                 "ResetFailedUnit",
3422                                 NULL,
3423                                 NULL,
3424                                 DBUS_TYPE_STRING, &n,
3425                                 DBUS_TYPE_INVALID);
3426                 if (r < 0)
3427                         return r;
3428         }
3429
3430         return 0;
3431 }
3432
3433 static int show_enviroment(DBusConnection *bus, char **args) {
3434         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3435         DBusMessageIter iter, sub, sub2;
3436         int r;
3437         const char
3438                 *interface = "org.freedesktop.systemd1.Manager",
3439                 *property = "Environment";
3440
3441         pager_open_if_enabled();
3442
3443         r = bus_method_call_with_reply(
3444                         bus,
3445                         "org.freedesktop.systemd1",
3446                         "/org/freedesktop/systemd1",
3447                         "org.freedesktop.DBus.Properties",
3448                         "Get",
3449                         &reply,
3450                         NULL,
3451                         DBUS_TYPE_STRING, &interface,
3452                         DBUS_TYPE_STRING, &property,
3453                         DBUS_TYPE_INVALID);
3454         if (r < 0)
3455                 return r;
3456
3457         if (!dbus_message_iter_init(reply, &iter) ||
3458             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3459                 log_error("Failed to parse reply.");
3460                 return -EIO;
3461         }
3462
3463         dbus_message_iter_recurse(&iter, &sub);
3464
3465         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
3466             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
3467                 log_error("Failed to parse reply.");
3468                 return -EIO;
3469         }
3470
3471         dbus_message_iter_recurse(&sub, &sub2);
3472
3473         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
3474                 const char *text;
3475
3476                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
3477                         log_error("Failed to parse reply.");
3478                         return -EIO;
3479                 }
3480
3481                 dbus_message_iter_get_basic(&sub2, &text);
3482                 puts(text);
3483
3484                 dbus_message_iter_next(&sub2);
3485         }
3486
3487         return 0;
3488 }
3489
3490 static int switch_root(DBusConnection *bus, char **args) {
3491         unsigned l;
3492         const char *root;
3493         _cleanup_free_ char *init = NULL;
3494
3495         l = strv_length(args);
3496         if (l < 2 || l > 3) {
3497                 log_error("Wrong number of arguments.");
3498                 return -EINVAL;
3499         }
3500
3501         root = args[1];
3502
3503         if (l >= 3)
3504                 init = strdup(args[2]);
3505         else {
3506                 parse_env_file("/proc/cmdline", WHITESPACE,
3507                                "init", &init,
3508                                NULL);
3509
3510                 if (!init)
3511                         init = strdup("");
3512         }
3513         if (!init)
3514                 return log_oom();
3515
3516         log_debug("switching root - root: %s; init: %s", root, init);
3517
3518         return bus_method_call_with_reply(
3519                         bus,
3520                         "org.freedesktop.systemd1",
3521                         "/org/freedesktop/systemd1",
3522                         "org.freedesktop.systemd1.Manager",
3523                         "SwitchRoot",
3524                         NULL,
3525                         NULL,
3526                         DBUS_TYPE_STRING, &root,
3527                         DBUS_TYPE_STRING, &init,
3528                         DBUS_TYPE_INVALID);
3529 }
3530
3531 static int set_environment(DBusConnection *bus, char **args) {
3532         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
3533         DBusError error;
3534         const char *method;
3535         DBusMessageIter iter;
3536         int r;
3537
3538         assert(bus);
3539         assert(args);
3540
3541         dbus_error_init(&error);
3542
3543         method = streq(args[0], "set-environment")
3544                 ? "SetEnvironment"
3545                 : "UnsetEnvironment";
3546
3547         m = dbus_message_new_method_call(
3548                         "org.freedesktop.systemd1",
3549                         "/org/freedesktop/systemd1",
3550                         "org.freedesktop.systemd1.Manager",
3551                         method);
3552         if (!m)
3553                 return log_oom();
3554
3555         dbus_message_iter_init_append(m, &iter);
3556
3557         r = bus_append_strv_iter(&iter, args + 1);
3558         if (r < 0)
3559                 return log_oom();
3560
3561         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
3562         if (!reply) {
3563                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3564                 dbus_error_free(&error);
3565                 return -EIO;
3566         }
3567
3568         return 0;
3569 }
3570
3571 static int enable_sysv_units(char **args) {
3572         int r = 0;
3573
3574 #if defined(HAVE_SYSV_COMPAT) && defined(HAVE_CHKCONFIG)
3575         const char *verb = args[0];
3576         unsigned f = 1, t = 1;
3577         LookupPaths paths;
3578
3579         if (arg_scope != UNIT_FILE_SYSTEM)
3580                 return 0;
3581
3582         if (!streq(verb, "enable") &&
3583             !streq(verb, "disable") &&
3584             !streq(verb, "is-enabled"))
3585                 return 0;
3586
3587         /* Processes all SysV units, and reshuffles the array so that
3588          * afterwards only the native units remain */
3589
3590         zero(paths);
3591         r = lookup_paths_init(&paths, SYSTEMD_SYSTEM, false, NULL, NULL, NULL);
3592         if (r < 0)
3593                 return r;
3594
3595         r = 0;
3596         for (f = 1; args[f]; f++) {
3597                 const char *name;
3598                 char *p;
3599                 bool found_native = false, found_sysv;
3600                 unsigned c = 1;
3601                 const char *argv[6] = { "/sbin/chkconfig", NULL, NULL, NULL, NULL };
3602                 char **k, *l, *q = NULL;
3603                 int j;
3604                 pid_t pid;
3605                 siginfo_t status;
3606
3607                 name = args[f];
3608
3609                 if (!endswith(name, ".service"))
3610                         continue;
3611
3612                 if (path_is_absolute(name))
3613                         continue;
3614
3615                 STRV_FOREACH(k, paths.unit_path) {
3616                         p = NULL;
3617
3618                         if (!isempty(arg_root))
3619                                 asprintf(&p, "%s/%s/%s", arg_root, *k, name);
3620                         else
3621                                 asprintf(&p, "%s/%s", *k, name);
3622
3623                         if (!p) {
3624                                 r = log_oom();
3625                                 goto finish;
3626                         }
3627
3628                         found_native = access(p, F_OK) >= 0;
3629                         free(p);
3630
3631                         if (found_native)
3632                                 break;
3633                 }
3634
3635                 if (found_native)
3636                         continue;
3637
3638                 p = NULL;
3639                 if (!isempty(arg_root))
3640                         asprintf(&p, "%s/" SYSTEM_SYSVINIT_PATH "/%s", arg_root, name);
3641                 else
3642                         asprintf(&p, SYSTEM_SYSVINIT_PATH "/%s", name);
3643                 if (!p) {
3644                         r = log_oom();
3645                         goto finish;
3646                 }
3647
3648                 p[strlen(p) - sizeof(".service") + 1] = 0;
3649                 found_sysv = access(p, F_OK) >= 0;
3650
3651                 if (!found_sysv) {
3652                         free(p);
3653                         continue;
3654                 }
3655
3656                 /* Mark this entry, so that we don't try enabling it as native unit */
3657                 args[f] = (char*) "";
3658
3659                 log_info("%s is not a native service, redirecting to /sbin/chkconfig.", name);
3660
3661                 if (!isempty(arg_root))
3662                         argv[c++] = q = strappend("--root=", arg_root);
3663
3664                 argv[c++] = path_get_file_name(p);
3665                 argv[c++] =
3666                         streq(verb, "enable") ? "on" :
3667                         streq(verb, "disable") ? "off" : "--level=5";
3668                 argv[c] = NULL;
3669
3670                 l = strv_join((char**)argv, " ");
3671                 if (!l) {
3672                         free(q);
3673                         free(p);
3674                         r = log_oom();
3675                         goto finish;
3676                 }
3677
3678                 log_info("Executing %s", l);
3679                 free(l);
3680
3681                 pid = fork();
3682                 if (pid < 0) {
3683                         log_error("Failed to fork: %m");
3684                         free(p);
3685                         free(q);
3686                         r = -errno;
3687                         goto finish;
3688                 } else if (pid == 0) {
3689                         /* Child */
3690
3691                         execv(argv[0], (char**) argv);
3692                         _exit(EXIT_FAILURE);
3693                 }
3694
3695                 free(p);
3696                 free(q);
3697
3698                 j = wait_for_terminate(pid, &status);
3699                 if (j < 0) {
3700                         log_error("Failed to wait for child: %s", strerror(-r));
3701                         r = j;
3702                         goto finish;
3703                 }
3704
3705                 if (status.si_code == CLD_EXITED) {
3706                         if (streq(verb, "is-enabled")) {
3707                                 if (status.si_status == 0) {
3708                                         if (!arg_quiet)
3709                                                 puts("enabled");
3710                                         r = 1;
3711                                 } else {
3712                                         if (!arg_quiet)
3713                                                 puts("disabled");
3714                                 }
3715
3716                         } else if (status.si_status != 0) {
3717                                 r = -EINVAL;
3718                                 goto finish;
3719                         }
3720                 } else {
3721                         r = -EPROTO;
3722                         goto finish;
3723                 }
3724         }
3725
3726 finish:
3727         lookup_paths_free(&paths);
3728
3729         /* Drop all SysV units */
3730         for (f = 1, t = 1; args[f]; f++) {
3731
3732                 if (isempty(args[f]))
3733                         continue;
3734
3735                 args[t++] = args[f];
3736         }
3737
3738         args[t] = NULL;
3739
3740 #endif
3741         return r;
3742 }
3743
3744 static int mangle_names(char **original_names, char ***mangled_names) {
3745         char **i, **l, **name;
3746
3747         l = new(char*, strv_length(original_names) + 1);
3748         if (!l)
3749                 return log_oom();
3750
3751         i = l;
3752         STRV_FOREACH(name, original_names) {
3753
3754                 /* When enabling units qualified path names are OK,
3755                  * too, hence allow them explicitly. */
3756
3757                 if (is_path(*name))
3758                         *i = strdup(*name);
3759                 else
3760                         *i = unit_name_mangle(*name);
3761
3762                 if (!*i) {
3763                         strv_free(l);
3764                         return log_oom();
3765                 }
3766
3767                 i++;
3768         }
3769
3770         *i = NULL;
3771         *mangled_names = l;
3772
3773         return 0;
3774 }
3775
3776 static int enable_unit(DBusConnection *bus, char **args) {
3777         const char *verb = args[0];
3778         UnitFileChange *changes = NULL;
3779         unsigned n_changes = 0, i;
3780         int carries_install_info = -1;
3781         DBusMessage _cleanup_dbus_message_unref_ *m = NULL, *reply = NULL;
3782         int r;
3783         DBusError _cleanup_dbus_error_free_ error;
3784         char _cleanup_strv_free_ **mangled_names = NULL;
3785
3786         dbus_error_init(&error);
3787
3788         r = enable_sysv_units(args);
3789         if (r < 0)
3790                 return r;
3791
3792         if (!args[1])
3793                 return 0;
3794
3795         if (!bus || avoid_bus()) {
3796                 if (streq(verb, "enable")) {
3797                         r = unit_file_enable(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3798                         carries_install_info = r;
3799                 } else if (streq(verb, "disable"))
3800                         r = unit_file_disable(arg_scope, arg_runtime, arg_root, args+1, &changes, &n_changes);
3801                 else if (streq(verb, "reenable")) {
3802                         r = unit_file_reenable(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3803                         carries_install_info = r;
3804                 } else if (streq(verb, "link"))
3805                         r = unit_file_link(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3806                 else if (streq(verb, "preset")) {
3807                         r = unit_file_preset(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3808                         carries_install_info = r;
3809                 } else if (streq(verb, "mask"))
3810                         r = unit_file_mask(arg_scope, arg_runtime, arg_root, args+1, arg_force, &changes, &n_changes);
3811                 else if (streq(verb, "unmask"))
3812                         r = unit_file_unmask(arg_scope, arg_runtime, arg_root, args+1, &changes, &n_changes);
3813                 else
3814                         assert_not_reached("Unknown verb");
3815
3816                 if (r < 0) {
3817                         log_error("Operation failed: %s", strerror(-r));
3818                         goto finish;
3819                 }
3820
3821                 if (!arg_quiet) {
3822                         for (i = 0; i < n_changes; i++) {
3823                                 if (changes[i].type == UNIT_FILE_SYMLINK)
3824                                         log_info("ln -s '%s' '%s'", changes[i].source, changes[i].path);
3825                                 else
3826                                         log_info("rm '%s'", changes[i].path);
3827                         }
3828                 }
3829
3830                 r = 0;
3831         } else {
3832                 const char *method;
3833                 bool send_force = true, expect_carries_install_info = false;
3834                 dbus_bool_t a, b;
3835                 DBusMessageIter iter, sub, sub2;
3836
3837                 if (streq(verb, "enable")) {
3838                         method = "EnableUnitFiles";
3839                         expect_carries_install_info = true;
3840                 } else if (streq(verb, "disable")) {
3841                         method = "DisableUnitFiles";
3842                         send_force = false;
3843                 } else if (streq(verb, "reenable")) {
3844                         method = "ReenableUnitFiles";
3845                         expect_carries_install_info = true;
3846                 } else if (streq(verb, "link"))
3847                         method = "LinkUnitFiles";
3848                 else if (streq(verb, "preset")) {
3849                         method = "PresetUnitFiles";
3850                         expect_carries_install_info = true;
3851                 } else if (streq(verb, "mask"))
3852                         method = "MaskUnitFiles";
3853                 else if (streq(verb, "unmask")) {
3854                         method = "UnmaskUnitFiles";
3855                         send_force = false;
3856                 } else
3857                         assert_not_reached("Unknown verb");
3858
3859                 m = dbus_message_new_method_call(
3860                                 "org.freedesktop.systemd1",
3861                                 "/org/freedesktop/systemd1",
3862                                 "org.freedesktop.systemd1.Manager",
3863                                 method);
3864                 if (!m) {
3865                         r = log_oom();
3866                         goto finish;
3867                 }
3868
3869                 dbus_message_iter_init_append(m, &iter);
3870
3871                 r = mangle_names(args+1, &mangled_names);
3872                 if(r < 0)
3873                         goto finish;
3874
3875                 r = bus_append_strv_iter(&iter, mangled_names);
3876                 if (r < 0) {
3877                         log_error("Failed to append unit files.");
3878                         goto finish;
3879                 }
3880
3881                 a = arg_runtime;
3882                 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &a)) {
3883                         log_error("Failed to append runtime boolean.");
3884                         r = -ENOMEM;
3885                         goto finish;
3886                 }
3887
3888                 if (send_force) {
3889                         b = arg_force;
3890
3891                         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b)) {
3892                                 log_error("Failed to append force boolean.");
3893                                 r = -ENOMEM;
3894                                 goto finish;
3895                         }
3896                 }
3897
3898                 reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
3899                 if (!reply) {
3900                         log_error("Failed to issue method call: %s", bus_error_message(&error));
3901                         r = -EIO;
3902                         goto finish;
3903                 }
3904
3905                 if (!dbus_message_iter_init(reply, &iter)) {
3906                         log_error("Failed to initialize iterator.");
3907                         goto finish;
3908                 }
3909
3910                 if (expect_carries_install_info) {
3911                         r = bus_iter_get_basic_and_next(&iter, DBUS_TYPE_BOOLEAN, &b, true);
3912                         if (r < 0) {
3913                                 log_error("Failed to parse reply.");
3914                                 goto finish;
3915                         }
3916
3917                         carries_install_info = b;
3918                 }
3919
3920                 if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
3921                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
3922                         log_error("Failed to parse reply.");
3923                         r = -EIO;
3924                         goto finish;
3925                 }
3926
3927                 dbus_message_iter_recurse(&iter, &sub);
3928                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
3929                         const char *type, *path, *source;
3930
3931                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
3932                                 log_error("Failed to parse reply.");
3933                                 r = -EIO;
3934                                 goto finish;
3935                         }
3936
3937                         dbus_message_iter_recurse(&sub, &sub2);
3938
3939                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
3940                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0 ||
3941                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &source, false) < 0) {
3942                                 log_error("Failed to parse reply.");
3943                                 r = -EIO;
3944                                 goto finish;
3945                         }
3946
3947                         if (!arg_quiet) {
3948                                 if (streq(type, "symlink"))
3949                                         log_info("ln -s '%s' '%s'", source, path);
3950                                 else
3951                                         log_info("rm '%s'", path);
3952                         }
3953
3954                         dbus_message_iter_next(&sub);
3955                 }
3956
3957                 /* Try to reload if enabeld */
3958                 if (!arg_no_reload)
3959                         r = daemon_reload(bus, args);
3960         }
3961
3962         if (carries_install_info == 0)
3963                 log_warning("The unit files have no [Install] section. They are not meant to be enabled\n"
3964                             "using systemctl.\n"
3965                             "Possible reasons for having this kind of units are:\n"
3966                             "1) A unit may be statically enabled by being symlinked from another unit's\n"
3967                             "   .wants/ or .requires/ directory.\n"
3968                             "2) A unit's purpose may be to act as a helper for some other unit which has\n"
3969                             "   a requirement dependency on it.\n"
3970                             "3) A unit may be started when needed via activation (socket, path, timer,\n"
3971                             "   D-Bus, udev, scripted systemctl call, ...).\n");
3972
3973 finish:
3974         unit_file_changes_free(changes, n_changes);
3975
3976         return r;
3977 }
3978
3979 static int unit_is_enabled(DBusConnection *bus, char **args) {
3980         DBusError _cleanup_dbus_error_free_ error;
3981         int r;
3982         DBusMessage _cleanup_dbus_message_unref_ *reply = NULL;
3983         bool enabled;
3984         char **name;
3985         char *n;
3986
3987         dbus_error_init(&error);
3988
3989         r = enable_sysv_units(args);
3990         if (r < 0)
3991                 return r;
3992
3993         enabled = r > 0;
3994
3995         if (!bus || avoid_bus()) {
3996
3997                 STRV_FOREACH(name, args+1) {
3998                         UnitFileState state;
3999
4000                         n = unit_name_mangle(*name);
4001                         if (!n)
4002                                 return log_oom();
4003
4004                         state = unit_file_get_state(arg_scope, arg_root, n);
4005
4006                         free(n);
4007
4008                         if (state < 0)
4009                                 return state;
4010
4011                         if (state == UNIT_FILE_ENABLED ||
4012                             state == UNIT_FILE_ENABLED_RUNTIME ||
4013                             state == UNIT_FILE_STATIC)
4014                                 enabled = true;
4015
4016                         if (!arg_quiet)
4017                                 puts(unit_file_state_to_string(state));
4018                 }
4019
4020         } else {
4021                 STRV_FOREACH(name, args+1) {
4022                         const char *s;
4023
4024                         n = unit_name_mangle(*name);
4025                         if (!n)
4026                                 return log_oom();
4027
4028                         r = bus_method_call_with_reply (
4029                                         bus,
4030                                         "org.freedesktop.systemd1",
4031                                         "/org/freedesktop/systemd1",
4032                                         "org.freedesktop.systemd1.Manager",
4033                                         "GetUnitFileState",
4034                                         &reply,
4035                                         NULL,
4036                                         DBUS_TYPE_STRING, &n,
4037                                         DBUS_TYPE_INVALID);
4038
4039                         free(n);
4040
4041                         if (r)
4042                                 return r;
4043
4044                         if (!dbus_message_get_args(reply, &error,
4045                                                    DBUS_TYPE_STRING, &s,
4046                                                    DBUS_TYPE_INVALID)) {
4047                                 log_error("Failed to parse reply: %s", bus_error_message(&error));
4048                                 return -EIO;
4049                         }
4050
4051                         dbus_message_unref(reply);
4052                         reply = NULL;
4053
4054                         if (streq(s, "enabled") ||
4055                             streq(s, "enabled-runtime") ||
4056                             streq(s, "static"))
4057                                 enabled = true;
4058
4059                         if (!arg_quiet)
4060                                 puts(s);
4061                 }
4062         }
4063
4064         return enabled ? 0 : 1;
4065 }
4066
4067 static int systemctl_help(void) {
4068
4069         pager_open_if_enabled();
4070
4071         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
4072                "Query or send control commands to the systemd manager.\n\n"
4073                "  -h --help           Show this help\n"
4074                "     --version        Show package version\n"
4075                "  -t --type=TYPE      List only units of a particular type\n"
4076                "  -p --property=NAME  Show only properties by this name\n"
4077                "  -a --all            Show all units/properties, including dead/empty ones\n"
4078                "     --failed         Show only failed units\n"
4079                "     --full           Don't ellipsize unit names on output\n"
4080                "     --fail           When queueing a new job, fail if conflicting jobs are\n"
4081                "                      pending\n"
4082                "     --ignore-dependencies\n"
4083                "                      When queueing a new job, ignore all its dependencies\n"
4084                "  -i --ignore-inhibitors\n"
4085                "                      When shutting down or sleeping, ignore inhibitors\n"
4086                "     --kill-who=WHO   Who to send signal to\n"
4087                "  -s --signal=SIGNAL  Which signal to send\n"
4088                "  -H --host=[USER@]HOST\n"
4089                "                      Show information for remote host\n"
4090                "  -P --privileged     Acquire privileges before execution\n"
4091                "  -q --quiet          Suppress output\n"
4092                "     --no-block       Do not wait until operation finished\n"
4093                "     --no-wall        Don't send wall message before halt/power-off/reboot\n"
4094                "     --no-reload      When enabling/disabling unit files, don't reload daemon\n"
4095                "                      configuration\n"
4096                "     --no-legend      Do not print a legend (column headers and hints)\n"
4097                "     --no-pager       Do not pipe output into a pager\n"
4098                "     --no-ask-password\n"
4099                "                      Do not ask for system passwords\n"
4100                "     --system         Connect to system manager\n"
4101                "     --user           Connect to user service manager\n"
4102                "     --global         Enable/disable unit files globally\n"
4103                "  -f --force          When enabling unit files, override existing symlinks\n"
4104                "                      When shutting down, execute action immediately\n"
4105                "     --root=PATH      Enable unit files in the specified root directory\n"
4106                "     --runtime        Enable unit files only temporarily until next reboot\n"
4107                "  -n --lines=INTEGER  Journal entries to show\n"
4108                "  -o --output=STRING  Change journal output mode (short, short-monotonic,\n"
4109                "                      verbose, export, json, json-pretty, json-sse, cat)\n\n"
4110                "Unit Commands:\n"
4111                "  list-units                      List loaded units\n"
4112                "  start [NAME...]                 Start (activate) one or more units\n"
4113                "  stop [NAME...]                  Stop (deactivate) one or more units\n"
4114                "  reload [NAME...]                Reload one or more units\n"
4115                "  restart [NAME...]               Start or restart one or more units\n"
4116                "  try-restart [NAME...]           Restart one or more units if active\n"
4117                "  reload-or-restart [NAME...]     Reload one or more units if possible,\n"
4118                "                                  otherwise start or restart\n"
4119                "  reload-or-try-restart [NAME...] Reload one or more units if possible,\n"
4120                "                                  otherwise restart if active\n"
4121                "  isolate [NAME]                  Start one unit and stop all others\n"
4122                "  kill [NAME...]                  Send signal to processes of a unit\n"
4123                "  is-active [NAME...]             Check whether units are active\n"
4124                "  is-failed [NAME...]             Check whether units are failed\n"
4125                "  status [NAME...|PID...]         Show runtime status of one or more units\n"
4126                "  show [NAME...|JOB...]           Show properties of one or more\n"
4127                "                                  units/jobs or the manager\n"
4128                "  help [NAME...|PID...]           Show manual for one or more units\n"
4129                "  reset-failed [NAME...]          Reset failed state for all, one, or more\n"
4130                "                                  units\n"
4131                "  get-cgroup-attr [NAME] [ATTR] ...\n"
4132                "                                  Get control group attrubute\n"
4133                "  set-cgroup-attr [NAME] [ATTR] [VALUE] ...\n"
4134                "                                  Set control group attribute\n"
4135                "  unset-cgroup-attr [NAME] [ATTR...]\n"
4136                "                                  Unset control group attribute\n"
4137                "  set-cgroup [NAME] [CGROUP...]   Add unit to a control group\n"
4138                "  unset-cgroup [NAME] [CGROUP...] Remove unit from a control group\n"
4139                "  load [NAME...]                  Load one or more units\n"
4140                "  list-dependencies [NAME]        Recursively show units which are required\n"
4141                "                                  or wanted by this unit\n\n"
4142                "Unit File Commands:\n"
4143                "  list-unit-files                 List installed unit files\n"
4144                "  enable [NAME...]                Enable one or more unit files\n"
4145                "  disable [NAME...]               Disable one or more unit files\n"
4146                "  reenable [NAME...]              Reenable one or more unit files\n"
4147                "  preset [NAME...]                Enable/disable one or more unit files\n"
4148                "                                  based on preset configuration\n"
4149                "  mask [NAME...]                  Mask one or more units\n"
4150                "  unmask [NAME...]                Unmask one or more units\n"
4151                "  link [PATH...]                  Link one or more units files into\n"
4152                "                                  the search path\n"
4153                "  is-enabled [NAME...]            Check whether unit files are enabled\n\n"
4154                "Job Commands:\n"
4155                "  list-jobs                       List jobs\n"
4156                "  cancel [JOB...]                 Cancel all, one, or more jobs\n\n"
4157                "Status Commands:\n"
4158                "  dump                            Dump server status\n"
4159                "Snapshot Commands:\n"
4160                "  snapshot [NAME]                 Create a snapshot\n"
4161                "  delete [NAME...]                Remove one or more snapshots\n\n"
4162                "Environment Commands:\n"
4163                "  show-environment                Dump environment\n"
4164                "  set-environment [NAME=VALUE...] Set one or more environment variables\n"
4165                "  unset-environment [NAME...]     Unset one or more environment variables\n\n"
4166                "Manager Lifecycle Commands:\n"
4167                "  daemon-reload                   Reload systemd manager configuration\n"
4168                "  daemon-reexec                   Reexecute systemd manager\n\n"
4169                "System Commands:\n"
4170                "  default                         Enter system default mode\n"
4171                "  rescue                          Enter system rescue mode\n"
4172                "  emergency                       Enter system emergency mode\n"
4173                "  halt                            Shut down and halt the system\n"
4174                "  poweroff                        Shut down and power-off the system\n"
4175                "  reboot                          Shut down and reboot the system\n"
4176                "  kexec                           Shut down and reboot the system with kexec\n"
4177                "  exit                            Request user instance exit\n"
4178                "  switch-root [ROOT] [INIT]       Change to a different root file system\n"
4179                "  suspend                         Suspend the system\n"
4180                "  hibernate                       Hibernate the system\n"
4181                "  hybrid-sleep                    Hibernate and suspend the system\n",
4182                program_invocation_short_name);
4183
4184         return 0;
4185 }
4186
4187 static int halt_help(void) {
4188
4189         printf("%s [OPTIONS...]\n\n"
4190                "%s the system.\n\n"
4191                "     --help      Show this help\n"
4192                "     --halt      Halt the machine\n"
4193                "  -p --poweroff  Switch off the machine\n"
4194                "     --reboot    Reboot the machine\n"
4195                "  -f --force     Force immediate halt/power-off/reboot\n"
4196                "  -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record\n"
4197                "  -d --no-wtmp   Don't write wtmp record\n"
4198                "     --no-wall   Don't send wall message before halt/power-off/reboot\n",
4199                program_invocation_short_name,
4200                arg_action == ACTION_REBOOT   ? "Reboot" :
4201                arg_action == ACTION_POWEROFF ? "Power off" :
4202                                                "Halt");
4203
4204         return 0;
4205 }
4206
4207 static int shutdown_help(void) {
4208
4209         printf("%s [OPTIONS...] [TIME] [WALL...]\n\n"
4210                "Shut down the system.\n\n"
4211                "     --help      Show this help\n"
4212                "  -H --halt      Halt the machine\n"
4213                "  -P --poweroff  Power-off the machine\n"
4214                "  -r --reboot    Reboot the machine\n"
4215                "  -h             Equivalent to --poweroff, overridden by --halt\n"
4216                "  -k             Don't halt/power-off/reboot, just send warnings\n"
4217                "     --no-wall   Don't send wall message before halt/power-off/reboot\n"
4218                "  -c             Cancel a pending shutdown\n",
4219                program_invocation_short_name);
4220
4221         return 0;
4222 }
4223
4224 static int telinit_help(void) {
4225
4226         printf("%s [OPTIONS...] {COMMAND}\n\n"
4227                "Send control commands to the init daemon.\n\n"
4228                "     --help      Show this help\n"
4229                "     --no-wall   Don't send wall message before halt/power-off/reboot\n\n"
4230                "Commands:\n"
4231                "  0              Power-off the machine\n"
4232                "  6              Reboot the machine\n"
4233                "  2, 3, 4, 5     Start runlevelX.target unit\n"
4234                "  1, s, S        Enter rescue mode\n"
4235                "  q, Q           Reload init daemon configuration\n"
4236                "  u, U           Reexecute init daemon\n",
4237                program_invocation_short_name);
4238
4239         return 0;
4240 }
4241
4242 static int runlevel_help(void) {
4243
4244         printf("%s [OPTIONS...]\n\n"
4245                "Prints the previous and current runlevel of the init system.\n\n"
4246                "     --help      Show this help\n",
4247                program_invocation_short_name);
4248
4249         return 0;
4250 }
4251
4252 static int help_types(void) {
4253         int i;
4254
4255         puts("Available unit types:");
4256         for(i = UNIT_SERVICE; i < _UNIT_TYPE_MAX; i++)
4257                 if (unit_type_table[i])
4258                         puts(unit_type_table[i]);
4259
4260         puts("\nAvailable unit load states: ");
4261         for(i = UNIT_STUB; i < _UNIT_LOAD_STATE_MAX; i++)
4262                 if (unit_type_table[i])
4263                         puts(unit_load_state_table[i]);
4264
4265         return 0;
4266 }
4267
4268 static int systemctl_parse_argv(int argc, char *argv[]) {
4269
4270         enum {
4271                 ARG_FAIL = 0x100,
4272                 ARG_IRREVERSIBLE,
4273                 ARG_IGNORE_DEPENDENCIES,
4274                 ARG_VERSION,
4275                 ARG_USER,
4276                 ARG_SYSTEM,
4277                 ARG_GLOBAL,
4278                 ARG_NO_BLOCK,
4279                 ARG_NO_LEGEND,
4280                 ARG_NO_PAGER,
4281                 ARG_NO_WALL,
4282                 ARG_ROOT,
4283                 ARG_FULL,
4284                 ARG_NO_RELOAD,
4285                 ARG_KILL_WHO,
4286                 ARG_NO_ASK_PASSWORD,
4287                 ARG_FAILED,
4288                 ARG_RUNTIME,
4289                 ARG_FORCE
4290         };
4291
4292         static const struct option options[] = {
4293                 { "help",      no_argument,       NULL, 'h'           },
4294                 { "version",   no_argument,       NULL, ARG_VERSION   },
4295                 { "type",      required_argument, NULL, 't'           },
4296                 { "property",  required_argument, NULL, 'p'           },
4297                 { "all",       no_argument,       NULL, 'a'           },
4298                 { "failed",    no_argument,       NULL, ARG_FAILED    },
4299                 { "full",      no_argument,       NULL, ARG_FULL      },
4300                 { "fail",      no_argument,       NULL, ARG_FAIL      },
4301                 { "irreversible", no_argument,    NULL, ARG_IRREVERSIBLE },
4302                 { "ignore-dependencies", no_argument, NULL, ARG_IGNORE_DEPENDENCIES },
4303                 { "ignore-inhibitors", no_argument, NULL, 'i'         },
4304                 { "user",      no_argument,       NULL, ARG_USER      },
4305                 { "system",    no_argument,       NULL, ARG_SYSTEM    },
4306                 { "global",    no_argument,       NULL, ARG_GLOBAL    },
4307                 { "no-block",  no_argument,       NULL, ARG_NO_BLOCK  },
4308                 { "no-legend", no_argument,       NULL, ARG_NO_LEGEND },
4309                 { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
4310                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL   },
4311                 { "quiet",     no_argument,       NULL, 'q'           },
4312                 { "root",      required_argument, NULL, ARG_ROOT      },
4313                 { "force",     no_argument,       NULL, ARG_FORCE     },
4314                 { "no-reload", no_argument,       NULL, ARG_NO_RELOAD },
4315                 { "kill-who",  required_argument, NULL, ARG_KILL_WHO  },
4316                 { "signal",    required_argument, NULL, 's'           },
4317                 { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
4318                 { "host",      required_argument, NULL, 'H'           },
4319                 { "privileged",no_argument,       NULL, 'P'           },
4320                 { "runtime",   no_argument,       NULL, ARG_RUNTIME   },
4321                 { "lines",     required_argument, NULL, 'n'           },
4322                 { "output",    required_argument, NULL, 'o'           },
4323                 { NULL,        0,                 NULL, 0             }
4324         };
4325
4326         int c;
4327
4328         assert(argc >= 0);
4329         assert(argv);
4330
4331         while ((c = getopt_long(argc, argv, "ht:p:aqfs:H:Pn:o:i", options, NULL)) >= 0) {
4332
4333                 switch (c) {
4334
4335                 case 'h':
4336                         systemctl_help();
4337                         return 0;
4338
4339                 case ARG_VERSION:
4340                         puts(PACKAGE_STRING);
4341                         puts(SYSTEMD_FEATURES);
4342                         return 0;
4343
4344                 case 't':
4345                         if (streq(optarg, "help")) {
4346                                 help_types();
4347                                 return 0;
4348                         }
4349
4350                         if (unit_type_from_string(optarg) >= 0) {
4351                                 arg_type = optarg;
4352                                 break;
4353                         }
4354                         if (unit_load_state_from_string(optarg) >= 0) {
4355                                 arg_load_state = optarg;
4356                                 break;
4357                         }
4358                         log_error("Unkown unit type or load state '%s'.",
4359                                   optarg);
4360                         log_info("Use -t help to see a list of allowed values.");
4361                         return -EINVAL;
4362                 case 'p': {
4363                         char *word, *state;
4364                         size_t size;
4365                         /* Make sure that if the empty property list
4366                            was specified, we won't show any properties. */
4367                         const char *source = isempty(optarg) ? " " : optarg;
4368
4369                         FOREACH_WORD_SEPARATOR(word, size, source, ",", state) {
4370                                 char _cleanup_free_ *prop;
4371                                 char **tmp;
4372
4373                                 prop = strndup(word, size);
4374                                 if (!prop)
4375                                         return -ENOMEM;
4376
4377                                 tmp = strv_append(arg_property, prop);
4378                                 if (!tmp)
4379                                         return -ENOMEM;
4380
4381                                 strv_free(arg_property);
4382                                 arg_property = tmp;
4383                         }
4384
4385                         /* If the user asked for a particular
4386                          * property, show it to him, even if it is
4387                          * empty. */
4388                         arg_all = true;
4389
4390                         break;
4391                 }
4392
4393                 case 'a':
4394                         arg_all = true;
4395                         break;
4396
4397                 case ARG_FAIL:
4398                         arg_job_mode = "fail";
4399                         break;
4400
4401                 case ARG_IRREVERSIBLE:
4402                         arg_job_mode = "replace-irreversibly";
4403                         break;
4404
4405                 case ARG_IGNORE_DEPENDENCIES:
4406                         arg_job_mode = "ignore-dependencies";
4407                         break;
4408
4409                 case ARG_USER:
4410                         arg_scope = UNIT_FILE_USER;
4411                         break;
4412
4413                 case ARG_SYSTEM:
4414                         arg_scope = UNIT_FILE_SYSTEM;
4415                         break;
4416
4417                 case ARG_GLOBAL:
4418                         arg_scope = UNIT_FILE_GLOBAL;
4419                         break;
4420
4421                 case ARG_NO_BLOCK:
4422                         arg_no_block = true;
4423                         break;
4424
4425                 case ARG_NO_LEGEND:
4426                         arg_no_legend = true;
4427                         break;
4428
4429                 case ARG_NO_PAGER:
4430                         arg_no_pager = true;
4431                         break;
4432
4433                 case ARG_NO_WALL:
4434                         arg_no_wall = true;
4435                         break;
4436
4437                 case ARG_ROOT:
4438                         arg_root = optarg;
4439                         break;
4440
4441                 case ARG_FULL:
4442                         arg_full = true;
4443                         break;
4444
4445                 case ARG_FAILED:
4446                         arg_failed = true;
4447                         break;
4448
4449                 case 'q':
4450                         arg_quiet = true;
4451                         break;
4452
4453                 case ARG_FORCE:
4454                         arg_force ++;
4455                         break;
4456
4457                 case 'f':
4458                         arg_force ++;
4459                         break;
4460
4461                 case ARG_NO_RELOAD:
4462                         arg_no_reload = true;
4463                         break;
4464
4465                 case ARG_KILL_WHO:
4466                         arg_kill_who = optarg;
4467                         break;
4468
4469                 case 's':
4470                         if ((arg_signal = signal_from_string_try_harder(optarg)) < 0) {
4471                                 log_error("Failed to parse signal string %s.", optarg);
4472                                 return -EINVAL;
4473                         }
4474                         break;
4475
4476                 case ARG_NO_ASK_PASSWORD:
4477                         arg_ask_password = false;
4478                         break;
4479
4480                 case 'P':
4481                         arg_transport = TRANSPORT_POLKIT;
4482                         break;
4483
4484                 case 'H':
4485                         arg_transport = TRANSPORT_SSH;
4486                         arg_host = optarg;
4487                         break;
4488
4489                 case ARG_RUNTIME:
4490                         arg_runtime = true;
4491                         break;
4492
4493                 case 'n':
4494                         if (safe_atou(optarg, &arg_lines) < 0) {
4495                                 log_error("Failed to parse lines '%s'", optarg);
4496                                 return -EINVAL;
4497                         }
4498                         break;
4499
4500                 case 'o':
4501                         arg_output = output_mode_from_string(optarg);
4502                         if (arg_output < 0) {
4503                                 log_error("Unknown output '%s'.", optarg);
4504                                 return -EINVAL;
4505                         }
4506                         break;
4507
4508                 case 'i':
4509                         arg_ignore_inhibitors = true;
4510                         break;
4511
4512                 case '?':
4513                         return -EINVAL;
4514
4515                 default:
4516                         log_error("Unknown option code '%c'.", c);
4517                         return -EINVAL;
4518                 }
4519         }
4520
4521         if (arg_transport != TRANSPORT_NORMAL && arg_scope != UNIT_FILE_SYSTEM) {
4522                 log_error("Cannot access user instance remotely.");
4523                 return -EINVAL;
4524         }
4525
4526         return 1;
4527 }
4528
4529 static int halt_parse_argv(int argc, char *argv[]) {
4530
4531         enum {
4532                 ARG_HELP = 0x100,
4533                 ARG_HALT,
4534                 ARG_REBOOT,
4535                 ARG_NO_WALL
4536         };
4537
4538         static const struct option options[] = {
4539                 { "help",      no_argument,       NULL, ARG_HELP    },
4540                 { "halt",      no_argument,       NULL, ARG_HALT    },
4541                 { "poweroff",  no_argument,       NULL, 'p'         },
4542                 { "reboot",    no_argument,       NULL, ARG_REBOOT  },
4543                 { "force",     no_argument,       NULL, 'f'         },
4544                 { "wtmp-only", no_argument,       NULL, 'w'         },
4545                 { "no-wtmp",   no_argument,       NULL, 'd'         },
4546                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4547                 { NULL,        0,                 NULL, 0           }
4548         };
4549
4550         int c, runlevel;
4551
4552         assert(argc >= 0);
4553         assert(argv);
4554
4555         if (utmp_get_runlevel(&runlevel, NULL) >= 0)
4556                 if (runlevel == '0' || runlevel == '6')
4557                         arg_force = 2;
4558
4559         while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) {
4560                 switch (c) {
4561
4562                 case ARG_HELP:
4563                         halt_help();
4564                         return 0;
4565
4566                 case ARG_HALT:
4567                         arg_action = ACTION_HALT;
4568                         break;
4569
4570                 case 'p':
4571                         if (arg_action != ACTION_REBOOT)
4572                                 arg_action = ACTION_POWEROFF;
4573                         break;
4574
4575                 case ARG_REBOOT:
4576                         arg_action = ACTION_REBOOT;
4577                         break;
4578
4579                 case 'f':
4580                         arg_force = 2;
4581                         break;
4582
4583                 case 'w':
4584                         arg_dry = true;
4585                         break;
4586
4587                 case 'd':
4588                         arg_no_wtmp = true;
4589                         break;
4590
4591                 case ARG_NO_WALL:
4592                         arg_no_wall = true;
4593                         break;
4594
4595                 case 'i':
4596                 case 'h':
4597                 case 'n':
4598                         /* Compatibility nops */
4599                         break;
4600
4601                 case '?':
4602                         return -EINVAL;
4603
4604                 default:
4605                         log_error("Unknown option code '%c'.", c);
4606                         return -EINVAL;
4607                 }
4608         }
4609
4610         if (optind < argc) {
4611                 log_error("Too many arguments.");
4612                 return -EINVAL;
4613         }
4614
4615         return 1;
4616 }
4617
4618 static int parse_time_spec(const char *t, usec_t *_u) {
4619         assert(t);
4620         assert(_u);
4621
4622         if (streq(t, "now"))
4623                 *_u = 0;
4624         else if (!strchr(t, ':')) {
4625                 uint64_t u;
4626
4627                 if (safe_atou64(t, &u) < 0)
4628                         return -EINVAL;
4629
4630                 *_u = now(CLOCK_REALTIME) + USEC_PER_MINUTE * u;
4631         } else {
4632                 char *e = NULL;
4633                 long hour, minute;
4634                 struct tm tm;
4635                 time_t s;
4636                 usec_t n;
4637
4638                 errno = 0;
4639                 hour = strtol(t, &e, 10);
4640                 if (errno != 0 || *e != ':' || hour < 0 || hour > 23)
4641                         return -EINVAL;
4642
4643                 minute = strtol(e+1, &e, 10);
4644                 if (errno != 0 || *e != 0 || minute < 0 || minute > 59)
4645                         return -EINVAL;
4646
4647                 n = now(CLOCK_REALTIME);
4648                 s = (time_t) (n / USEC_PER_SEC);
4649
4650                 zero(tm);
4651                 assert_se(localtime_r(&s, &tm));
4652
4653                 tm.tm_hour = (int) hour;
4654                 tm.tm_min = (int) minute;
4655                 tm.tm_sec = 0;
4656
4657                 assert_se(s = mktime(&tm));
4658
4659                 *_u = (usec_t) s * USEC_PER_SEC;
4660
4661                 while (*_u <= n)
4662                         *_u += USEC_PER_DAY;
4663         }
4664
4665         return 0;
4666 }
4667
4668 static int shutdown_parse_argv(int argc, char *argv[]) {
4669
4670         enum {
4671                 ARG_HELP = 0x100,
4672                 ARG_NO_WALL
4673         };
4674
4675         static const struct option options[] = {
4676                 { "help",      no_argument,       NULL, ARG_HELP    },
4677                 { "halt",      no_argument,       NULL, 'H'         },
4678                 { "poweroff",  no_argument,       NULL, 'P'         },
4679                 { "reboot",    no_argument,       NULL, 'r'         },
4680                 { "kexec",     no_argument,       NULL, 'K'         }, /* not documented extension */
4681                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4682                 { NULL,        0,                 NULL, 0           }
4683         };
4684
4685         int c, r;
4686
4687         assert(argc >= 0);
4688         assert(argv);
4689
4690         while ((c = getopt_long(argc, argv, "HPrhkt:afFc", options, NULL)) >= 0) {
4691                 switch (c) {
4692
4693                 case ARG_HELP:
4694                         shutdown_help();
4695                         return 0;
4696
4697                 case 'H':
4698                         arg_action = ACTION_HALT;
4699                         break;
4700
4701                 case 'P':
4702                         arg_action = ACTION_POWEROFF;
4703                         break;
4704
4705                 case 'r':
4706                         if (kexec_loaded())
4707                                 arg_action = ACTION_KEXEC;
4708                         else
4709                                 arg_action = ACTION_REBOOT;
4710                         break;
4711
4712                 case 'K':
4713                         arg_action = ACTION_KEXEC;
4714                         break;
4715
4716                 case 'h':
4717                         if (arg_action != ACTION_HALT)
4718                                 arg_action = ACTION_POWEROFF;
4719                         break;
4720
4721                 case 'k':
4722                         arg_dry = true;
4723                         break;
4724
4725                 case ARG_NO_WALL:
4726                         arg_no_wall = true;
4727                         break;
4728
4729                 case 't':
4730                 case 'a':
4731                         /* Compatibility nops */
4732                         break;
4733
4734                 case 'c':
4735                         arg_action = ACTION_CANCEL_SHUTDOWN;
4736                         break;
4737
4738                 case '?':
4739                         return -EINVAL;
4740
4741                 default:
4742                         log_error("Unknown option code '%c'.", c);
4743                         return -EINVAL;
4744                 }
4745         }
4746
4747         if (argc > optind && arg_action != ACTION_CANCEL_SHUTDOWN) {
4748                 r = parse_time_spec(argv[optind], &arg_when);
4749                 if (r < 0) {
4750                         log_error("Failed to parse time specification: %s", argv[optind]);
4751                         return r;
4752                 }
4753         } else
4754                 arg_when = now(CLOCK_REALTIME) + USEC_PER_MINUTE;
4755
4756         if (argc > optind && arg_action == ACTION_CANCEL_SHUTDOWN)
4757                 /* No time argument for shutdown cancel */
4758                 arg_wall = argv + optind;
4759         else if (argc > optind + 1)
4760                 /* We skip the time argument */
4761                 arg_wall = argv + optind + 1;
4762
4763         optind = argc;
4764
4765         return 1;
4766 }
4767
4768 static int telinit_parse_argv(int argc, char *argv[]) {
4769
4770         enum {
4771                 ARG_HELP = 0x100,
4772                 ARG_NO_WALL
4773         };
4774
4775         static const struct option options[] = {
4776                 { "help",      no_argument,       NULL, ARG_HELP    },
4777                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
4778                 { NULL,        0,                 NULL, 0           }
4779         };
4780
4781         static const struct {
4782                 char from;
4783                 enum action to;
4784         } table[] = {
4785                 { '0', ACTION_POWEROFF },
4786                 { '6', ACTION_REBOOT },
4787                 { '1', ACTION_RESCUE },
4788                 { '2', ACTION_RUNLEVEL2 },
4789                 { '3', ACTION_RUNLEVEL3 },
4790                 { '4', ACTION_RUNLEVEL4 },
4791                 { '5', ACTION_RUNLEVEL5 },
4792                 { 's', ACTION_RESCUE },
4793                 { 'S', ACTION_RESCUE },
4794                 { 'q', ACTION_RELOAD },
4795                 { 'Q', ACTION_RELOAD },
4796                 { 'u', ACTION_REEXEC },
4797                 { 'U', ACTION_REEXEC }
4798         };
4799
4800         unsigned i;
4801         int c;
4802
4803         assert(argc >= 0);
4804         assert(argv);
4805
4806         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
4807                 switch (c) {
4808
4809                 case ARG_HELP:
4810                         telinit_help();
4811                         return 0;
4812
4813                 case ARG_NO_WALL:
4814                         arg_no_wall = true;
4815                         break;
4816
4817                 case '?':
4818                         return -EINVAL;
4819
4820                 default:
4821                         log_error("Unknown option code '%c'.", c);
4822                         return -EINVAL;
4823                 }
4824         }
4825
4826         if (optind >= argc) {
4827                 telinit_help();
4828                 return -EINVAL;
4829         }
4830
4831         if (optind + 1 < argc) {
4832                 log_error("Too many arguments.");
4833                 return -EINVAL;
4834         }
4835
4836         if (strlen(argv[optind]) != 1) {
4837                 log_error("Expected single character argument.");
4838                 return -EINVAL;
4839         }
4840
4841         for (i = 0; i < ELEMENTSOF(table); i++)
4842                 if (table[i].from == argv[optind][0])
4843                         break;
4844
4845         if (i >= ELEMENTSOF(table)) {
4846                 log_error("Unknown command '%s'.", argv[optind]);
4847                 return -EINVAL;
4848         }
4849
4850         arg_action = table[i].to;
4851
4852         optind ++;
4853
4854         return 1;
4855 }
4856
4857 static int runlevel_parse_argv(int argc, char *argv[]) {
4858
4859         enum {
4860                 ARG_HELP = 0x100,
4861         };
4862
4863         static const struct option options[] = {
4864                 { "help",      no_argument,       NULL, ARG_HELP    },
4865                 { NULL,        0,                 NULL, 0           }
4866         };
4867
4868         int c;
4869
4870         assert(argc >= 0);
4871         assert(argv);
4872
4873         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
4874                 switch (c) {
4875
4876                 case ARG_HELP:
4877                         runlevel_help();
4878                         return 0;
4879
4880                 case '?':
4881                         return -EINVAL;
4882
4883                 default:
4884                         log_error("Unknown option code '%c'.", c);
4885                         return -EINVAL;
4886                 }
4887         }
4888
4889         if (optind < argc) {
4890                 log_error("Too many arguments.");
4891                 return -EINVAL;
4892         }
4893
4894         return 1;
4895 }
4896
4897 static int parse_argv(int argc, char *argv[]) {
4898         assert(argc >= 0);
4899         assert(argv);
4900
4901         if (program_invocation_short_name) {
4902
4903                 if (strstr(program_invocation_short_name, "halt")) {
4904                         arg_action = ACTION_HALT;
4905                         return halt_parse_argv(argc, argv);
4906                 } else if (strstr(program_invocation_short_name, "poweroff")) {
4907                         arg_action = ACTION_POWEROFF;
4908                         return halt_parse_argv(argc, argv);
4909                 } else if (strstr(program_invocation_short_name, "reboot")) {
4910                         if (kexec_loaded())
4911                                 arg_action = ACTION_KEXEC;
4912                         else
4913                                 arg_action = ACTION_REBOOT;
4914                         return halt_parse_argv(argc, argv);
4915                 } else if (strstr(program_invocation_short_name, "shutdown")) {
4916                         arg_action = ACTION_POWEROFF;
4917                         return shutdown_parse_argv(argc, argv);
4918                 } else if (strstr(program_invocation_short_name, "init")) {
4919
4920                         if (sd_booted() > 0) {
4921                                 arg_action = ACTION_INVALID;
4922                                 return telinit_parse_argv(argc, argv);
4923                         } else {
4924                                 /* Hmm, so some other init system is
4925                                  * running, we need to forward this
4926                                  * request to it. For now we simply
4927                                  * guess that it is Upstart. */
4928
4929                                 execv("/lib/upstart/telinit", argv);
4930
4931                                 log_error("Couldn't find an alternative telinit implementation to spawn.");
4932                                 return -EIO;
4933                         }
4934
4935                 } else if (strstr(program_invocation_short_name, "runlevel")) {
4936                         arg_action = ACTION_RUNLEVEL;
4937                         return runlevel_parse_argv(argc, argv);
4938                 }
4939         }
4940
4941         arg_action = ACTION_SYSTEMCTL;
4942         return systemctl_parse_argv(argc, argv);
4943 }
4944
4945 static int action_to_runlevel(void) {
4946
4947         static const char table[_ACTION_MAX] = {
4948                 [ACTION_HALT] =      '0',
4949                 [ACTION_POWEROFF] =  '0',
4950                 [ACTION_REBOOT] =    '6',
4951                 [ACTION_RUNLEVEL2] = '2',
4952                 [ACTION_RUNLEVEL3] = '3',
4953                 [ACTION_RUNLEVEL4] = '4',
4954                 [ACTION_RUNLEVEL5] = '5',
4955                 [ACTION_RESCUE] =    '1'
4956         };
4957
4958         assert(arg_action < _ACTION_MAX);
4959
4960         return table[arg_action];
4961 }
4962
4963 static int talk_upstart(void) {
4964         DBusMessage _cleanup_dbus_message_unref_ *m = NULL, *reply = NULL;
4965         DBusError _cleanup_dbus_error_free_ error;
4966         int previous, rl, r;
4967         char
4968                 env1_buf[] = "RUNLEVEL=X",
4969                 env2_buf[] = "PREVLEVEL=X";
4970         char *env1 = env1_buf, *env2 = env2_buf;
4971         const char *emit = "runlevel";
4972         dbus_bool_t b_false = FALSE;
4973         DBusMessageIter iter, sub;
4974         DBusConnection *bus;
4975
4976         dbus_error_init(&error);
4977
4978         if (!(rl = action_to_runlevel()))
4979                 return 0;
4980
4981         if (utmp_get_runlevel(&previous, NULL) < 0)
4982                 previous = 'N';
4983
4984         if (!(bus = dbus_connection_open_private("unix:abstract=/com/ubuntu/upstart", &error))) {
4985                 if (dbus_error_has_name(&error, DBUS_ERROR_NO_SERVER)) {
4986                         r = 0;
4987                         goto finish;
4988                 }
4989
4990                 log_error("Failed to connect to Upstart bus: %s", bus_error_message(&error));
4991                 r = -EIO;
4992                 goto finish;
4993         }
4994
4995         if ((r = bus_check_peercred(bus)) < 0) {
4996                 log_error("Failed to verify owner of bus.");
4997                 goto finish;
4998         }
4999
5000         if (!(m = dbus_message_new_method_call(
5001                               "com.ubuntu.Upstart",
5002                               "/com/ubuntu/Upstart",
5003                               "com.ubuntu.Upstart0_6",
5004                               "EmitEvent"))) {
5005
5006                 log_error("Could not allocate message.");
5007                 r = -ENOMEM;
5008                 goto finish;
5009         }
5010
5011         dbus_message_iter_init_append(m, &iter);
5012
5013         env1_buf[sizeof(env1_buf)-2] = rl;
5014         env2_buf[sizeof(env2_buf)-2] = previous;
5015
5016         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &emit) ||
5017             !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub) ||
5018             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env1) ||
5019             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env2) ||
5020             !dbus_message_iter_close_container(&iter, &sub) ||
5021             !dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b_false)) {
5022                 log_error("Could not append arguments to message.");
5023                 r = -ENOMEM;
5024                 goto finish;
5025         }
5026
5027         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
5028
5029                 if (bus_error_is_no_service(&error)) {
5030                         r = -EADDRNOTAVAIL;
5031                         goto finish;
5032                 }
5033
5034                 log_error("Failed to issue method call: %s", bus_error_message(&error));
5035                 r = -EIO;
5036                 goto finish;
5037         }
5038
5039         r = 1;
5040
5041 finish:
5042         if (bus) {
5043                 dbus_connection_flush(bus);
5044                 dbus_connection_close(bus);
5045                 dbus_connection_unref(bus);
5046         }
5047
5048         return r;
5049 }
5050
5051 static int talk_initctl(void) {
5052         struct init_request request;
5053         int r, fd;
5054         char rl;
5055
5056         if (!(rl = action_to_runlevel()))
5057                 return 0;
5058
5059         zero(request);
5060         request.magic = INIT_MAGIC;
5061         request.sleeptime = 0;
5062         request.cmd = INIT_CMD_RUNLVL;
5063         request.runlevel = rl;
5064
5065         if ((fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY)) < 0) {
5066
5067                 if (errno == ENOENT)
5068                         return 0;
5069
5070                 log_error("Failed to open "INIT_FIFO": %m");
5071                 return -errno;
5072         }
5073
5074         errno = 0;
5075         r = loop_write(fd, &request, sizeof(request), false) != sizeof(request);
5076         close_nointr_nofail(fd);
5077
5078         if (r < 0) {
5079                 log_error("Failed to write to "INIT_FIFO": %m");
5080                 return errno ? -errno : -EIO;
5081         }
5082
5083         return 1;
5084 }
5085
5086 static int systemctl_main(DBusConnection *bus, int argc, char *argv[], DBusError *error) {
5087
5088         static const struct {
5089                 const char* verb;
5090                 const enum {
5091                         MORE,
5092                         LESS,
5093                         EQUAL
5094                 } argc_cmp;
5095                 const int argc;
5096                 int (* const dispatch)(DBusConnection *bus, char **args);
5097         } verbs[] = {
5098                 { "list-units",            LESS,  1, list_units        },
5099                 { "list-unit-files",       EQUAL, 1, list_unit_files   },
5100                 { "list-jobs",             EQUAL, 1, list_jobs         },
5101                 { "clear-jobs",            EQUAL, 1, daemon_reload     },
5102                 { "load",                  MORE,  2, load_unit         },
5103                 { "cancel",                MORE,  2, cancel_job        },
5104                 { "start",                 MORE,  2, start_unit        },
5105                 { "stop",                  MORE,  2, start_unit        },
5106                 { "condstop",              MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
5107                 { "reload",                MORE,  2, start_unit        },
5108                 { "restart",               MORE,  2, start_unit        },
5109                 { "try-restart",           MORE,  2, start_unit        },
5110                 { "reload-or-restart",     MORE,  2, start_unit        },
5111                 { "reload-or-try-restart", MORE,  2, start_unit        },
5112                 { "force-reload",          MORE,  2, start_unit        }, /* For compatibility with SysV */
5113                 { "condreload",            MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
5114                 { "condrestart",           MORE,  2, start_unit        }, /* For compatibility with RH */
5115                 { "isolate",               EQUAL, 2, start_unit        },
5116                 { "set-cgroup",            MORE,  3, set_cgroup        },
5117                 { "unset-cgroup",          MORE,  3, set_cgroup        },
5118                 { "get-cgroup-attr",       MORE,  3, get_cgroup_attr   },
5119                 { "set-cgroup-attr",       MORE,  4, set_cgroup_attr   },
5120                 { "unset-cgroup-attr",     MORE,  3, set_cgroup        },
5121                 { "kill",                  MORE,  2, kill_unit         },
5122                 { "is-active",             MORE,  2, check_unit_active },
5123                 { "check",                 MORE,  2, check_unit_active },
5124                 { "is-failed",             MORE,  2, check_unit_failed },
5125                 { "show",                  MORE,  1, show              },
5126                 { "status",                MORE,  1, show              },
5127                 { "help",                  MORE,  2, show              },
5128                 { "dump",                  EQUAL, 1, dump              },
5129                 { "snapshot",              LESS,  2, snapshot          },
5130                 { "delete",                MORE,  2, delete_snapshot   },
5131                 { "daemon-reload",         EQUAL, 1, daemon_reload     },
5132                 { "daemon-reexec",         EQUAL, 1, daemon_reload     },
5133                 { "show-environment",      EQUAL, 1, show_enviroment   },
5134                 { "set-environment",       MORE,  2, set_environment   },
5135                 { "unset-environment",     MORE,  2, set_environment   },
5136                 { "halt",                  EQUAL, 1, start_special     },
5137                 { "poweroff",              EQUAL, 1, start_special     },
5138                 { "reboot",                EQUAL, 1, start_special     },
5139                 { "kexec",                 EQUAL, 1, start_special     },
5140                 { "suspend",               EQUAL, 1, start_special     },
5141                 { "hibernate",             EQUAL, 1, start_special     },
5142                 { "hybrid-sleep",          EQUAL, 1, start_special     },
5143                 { "default",               EQUAL, 1, start_special     },
5144                 { "rescue",                EQUAL, 1, start_special     },
5145                 { "emergency",             EQUAL, 1, start_special     },
5146                 { "exit",                  EQUAL, 1, start_special     },
5147                 { "reset-failed",          MORE,  1, reset_failed      },
5148                 { "enable",                MORE,  2, enable_unit       },
5149                 { "disable",               MORE,  2, enable_unit       },
5150                 { "is-enabled",            MORE,  2, unit_is_enabled   },
5151                 { "reenable",              MORE,  2, enable_unit       },
5152                 { "preset",                MORE,  2, enable_unit       },
5153                 { "mask",                  MORE,  2, enable_unit       },
5154                 { "unmask",                MORE,  2, enable_unit       },
5155                 { "link",                  MORE,  2, enable_unit       },
5156                 { "switch-root",           MORE,  2, switch_root       },
5157                 { "list-dependencies",     LESS,  2, list_dependencies },
5158         };
5159
5160         int left;
5161         unsigned i;
5162
5163         assert(argc >= 0);
5164         assert(argv);
5165         assert(error);
5166
5167         left = argc - optind;
5168
5169         if (left <= 0)
5170                 /* Special rule: no arguments means "list-units" */
5171                 i = 0;
5172         else {
5173                 if (streq(argv[optind], "help") && !argv[optind+1]) {
5174                         log_error("This command expects one or more "
5175                                   "unit names. Did you mean --help?");
5176                         return -EINVAL;
5177                 }
5178
5179                 for (i = 0; i < ELEMENTSOF(verbs); i++)
5180                         if (streq(argv[optind], verbs[i].verb))
5181                                 break;
5182
5183                 if (i >= ELEMENTSOF(verbs)) {
5184                         log_error("Unknown operation '%s'.", argv[optind]);
5185                         return -EINVAL;
5186                 }
5187         }
5188
5189         switch (verbs[i].argc_cmp) {
5190
5191         case EQUAL:
5192                 if (left != verbs[i].argc) {
5193                         log_error("Invalid number of arguments.");
5194                         return -EINVAL;
5195                 }
5196
5197                 break;
5198
5199         case MORE:
5200                 if (left < verbs[i].argc) {
5201                         log_error("Too few arguments.");
5202                         return -EINVAL;
5203                 }
5204
5205                 break;
5206
5207         case LESS:
5208                 if (left > verbs[i].argc) {
5209                         log_error("Too many arguments.");
5210                         return -EINVAL;
5211                 }
5212
5213                 break;
5214
5215         default:
5216                 assert_not_reached("Unknown comparison operator.");
5217         }
5218
5219         /* Require a bus connection for all operations but
5220          * enable/disable */
5221         if (!streq(verbs[i].verb, "enable") &&
5222             !streq(verbs[i].verb, "disable") &&
5223             !streq(verbs[i].verb, "is-enabled") &&
5224             !streq(verbs[i].verb, "list-unit-files") &&
5225             !streq(verbs[i].verb, "reenable") &&
5226             !streq(verbs[i].verb, "preset") &&
5227             !streq(verbs[i].verb, "mask") &&
5228             !streq(verbs[i].verb, "unmask") &&
5229             !streq(verbs[i].verb, "link")) {
5230
5231                 if (running_in_chroot() > 0) {
5232                         log_info("Running in chroot, ignoring request.");
5233                         return 0;
5234                 }
5235
5236                 if (((!streq(verbs[i].verb, "reboot") &&
5237                       !streq(verbs[i].verb, "halt") &&
5238                       !streq(verbs[i].verb, "poweroff")) || arg_force <= 0) && !bus) {
5239                         log_error("Failed to get D-Bus connection: %s",
5240                                   dbus_error_is_set(error) ? error->message : "No connection to service manager.");
5241                         return -EIO;
5242                 }
5243
5244         } else {
5245
5246                 if (!bus && !avoid_bus()) {
5247                         log_error("Failed to get D-Bus connection: %s",
5248                                   dbus_error_is_set(error) ? error->message : "No connection to service manager.");
5249                         return -EIO;
5250                 }
5251         }
5252
5253         return verbs[i].dispatch(bus, argv + optind);
5254 }
5255
5256 static int send_shutdownd(usec_t t, char mode, bool dry_run, bool warn, const char *message) {
5257         int _cleanup_close_ fd;
5258         struct msghdr msghdr;
5259         struct iovec iovec[2];
5260         union sockaddr_union sockaddr;
5261         struct sd_shutdown_command c;
5262
5263         fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
5264         if (fd < 0)
5265                 return -errno;
5266
5267         zero(c);
5268         c.usec = t;
5269         c.mode = mode;
5270         c.dry_run = dry_run;
5271         c.warn_wall = warn;
5272
5273         zero(sockaddr);
5274         sockaddr.sa.sa_family = AF_UNIX;
5275         strncpy(sockaddr.un.sun_path, "/run/systemd/shutdownd", sizeof(sockaddr.un.sun_path));
5276
5277         zero(msghdr);
5278         msghdr.msg_name = &sockaddr;
5279         msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/systemd/shutdownd") - 1;
5280
5281         zero(iovec);
5282         iovec[0].iov_base = (char*) &c;
5283         iovec[0].iov_len = offsetof(struct sd_shutdown_command, wall_message);
5284
5285         if (isempty(message))
5286                 msghdr.msg_iovlen = 1;
5287         else {
5288                 iovec[1].iov_base = (char*) message;
5289                 iovec[1].iov_len = strlen(message);
5290                 msghdr.msg_iovlen = 2;
5291         }
5292         msghdr.msg_iov = iovec;
5293
5294         if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0)
5295                 return -errno;
5296
5297         return 0;
5298 }
5299
5300 static int reload_with_fallback(DBusConnection *bus) {
5301
5302         if (bus) {
5303                 /* First, try systemd via D-Bus. */
5304                 if (daemon_reload(bus, NULL) >= 0)
5305                         return 0;
5306         }
5307
5308         /* Nothing else worked, so let's try signals */
5309         assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC);
5310
5311         if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) {
5312                 log_error("kill() failed: %m");
5313                 return -errno;
5314         }
5315
5316         return 0;
5317 }
5318
5319 static int start_with_fallback(DBusConnection *bus) {
5320
5321         if (bus) {
5322                 /* First, try systemd via D-Bus. */
5323                 if (start_unit(bus, NULL) >= 0)
5324                         goto done;
5325         }
5326
5327         /* Hmm, talking to systemd via D-Bus didn't work. Then
5328          * let's try to talk to Upstart via D-Bus. */
5329         if (talk_upstart() > 0)
5330                 goto done;
5331
5332         /* Nothing else worked, so let's try
5333          * /dev/initctl */
5334         if (talk_initctl() > 0)
5335                 goto done;
5336
5337         log_error("Failed to talk to init daemon.");
5338         return -EIO;
5339
5340 done:
5341         warn_wall(arg_action);
5342         return 0;
5343 }
5344
5345 static _noreturn_ void halt_now(enum action a) {
5346
5347        /* Make sure C-A-D is handled by the kernel from this
5348          * point on... */
5349         reboot(RB_ENABLE_CAD);
5350
5351         switch (a) {
5352
5353         case ACTION_HALT:
5354                 log_info("Halting.");
5355                 reboot(RB_HALT_SYSTEM);
5356                 break;
5357
5358         case ACTION_POWEROFF:
5359                 log_info("Powering off.");
5360                 reboot(RB_POWER_OFF);
5361                 break;
5362
5363         case ACTION_REBOOT:
5364                 log_info("Rebooting.");
5365                 reboot(RB_AUTOBOOT);
5366                 break;
5367
5368         default:
5369                 assert_not_reached("Unknown halt action.");
5370         }
5371
5372         assert_not_reached("Uh? This shouldn't happen.");
5373 }
5374
5375 static int halt_main(DBusConnection *bus) {
5376         int r;
5377
5378         r = check_inhibitors(bus, arg_action);
5379         if (r < 0)
5380                 return r;
5381
5382         if (geteuid() != 0) {
5383                 /* Try logind if we are a normal user and no special
5384                  * mode applies. Maybe PolicyKit allows us to shutdown
5385                  * the machine. */
5386
5387                 if (arg_when <= 0 &&
5388                     !arg_dry &&
5389                     arg_force <= 0 &&
5390                     (arg_action == ACTION_POWEROFF ||
5391                      arg_action == ACTION_REBOOT)) {
5392                         r = reboot_with_logind(bus, arg_action);
5393                         if (r >= 0)
5394                                 return r;
5395                 }
5396
5397                 log_error("Must be root.");
5398                 return -EPERM;
5399         }
5400
5401         if (arg_when > 0) {
5402                 char _cleanup_free_ *m;
5403
5404                 m = strv_join(arg_wall, " ");
5405                 r = send_shutdownd(arg_when,
5406                                    arg_action == ACTION_HALT     ? 'H' :
5407                                    arg_action == ACTION_POWEROFF ? 'P' :
5408                                    arg_action == ACTION_KEXEC    ? 'K' :
5409                                                                    'r',
5410                                    arg_dry,
5411                                    !arg_no_wall,
5412                                    m);
5413
5414                 if (r < 0)
5415                         log_warning("Failed to talk to shutdownd, proceeding with immediate shutdown: %s", strerror(-r));
5416                 else {
5417                         char date[FORMAT_TIMESTAMP_MAX];
5418
5419                         log_info("Shutdown scheduled for %s, use 'shutdown -c' to cancel.",
5420                                  format_timestamp(date, sizeof(date), arg_when));
5421                         return 0;
5422                 }
5423         }
5424
5425         if (!arg_dry && !arg_force)
5426                 return start_with_fallback(bus);
5427
5428         if (!arg_no_wtmp) {
5429                 if (sd_booted() > 0)
5430                         log_debug("Not writing utmp record, assuming that systemd-update-utmp is used.");
5431                 else {
5432                         r = utmp_put_shutdown();
5433                         if (r < 0)
5434                                 log_warning("Failed to write utmp record: %s", strerror(-r));
5435                 }
5436         }
5437
5438         if (arg_dry)
5439                 return 0;
5440
5441         halt_now(arg_action);
5442         /* We should never reach this. */
5443         return -ENOSYS;
5444 }
5445
5446 static int runlevel_main(void) {
5447         int r, runlevel, previous;
5448
5449         r = utmp_get_runlevel(&runlevel, &previous);
5450         if (r < 0) {
5451                 puts("unknown");
5452                 return r;
5453         }
5454
5455         printf("%c %c\n",
5456                previous <= 0 ? 'N' : previous,
5457                runlevel <= 0 ? 'N' : runlevel);
5458
5459         return 0;
5460 }
5461
5462 int main(int argc, char*argv[]) {
5463         int r, retval = EXIT_FAILURE;
5464         DBusConnection *bus = NULL;
5465         DBusError _cleanup_dbus_error_free_ error;
5466
5467         dbus_error_init(&error);
5468
5469         setlocale(LC_ALL, "");
5470         log_parse_environment();
5471         log_open();
5472
5473         r = parse_argv(argc, argv);
5474         if (r < 0)
5475                 goto finish;
5476         else if (r == 0) {
5477                 retval = EXIT_SUCCESS;
5478                 goto finish;
5479         }
5480
5481         /* /sbin/runlevel doesn't need to communicate via D-Bus, so
5482          * let's shortcut this */
5483         if (arg_action == ACTION_RUNLEVEL) {
5484                 r = runlevel_main();
5485                 retval = r < 0 ? EXIT_FAILURE : r;
5486                 goto finish;
5487         }
5488
5489         if (running_in_chroot() > 0 && arg_action != ACTION_SYSTEMCTL) {
5490                 log_info("Running in chroot, ignoring request.");
5491                 retval = 0;
5492                 goto finish;
5493         }
5494
5495         if (!avoid_bus()) {
5496                 if (arg_transport == TRANSPORT_NORMAL)
5497                         bus_connect(arg_scope == UNIT_FILE_SYSTEM ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, &bus, &private_bus, &error);
5498                 else if (arg_transport == TRANSPORT_POLKIT) {
5499                         bus_connect_system_polkit(&bus, &error);
5500                         private_bus = false;
5501                 } else if (arg_transport == TRANSPORT_SSH) {
5502                         bus_connect_system_ssh(NULL, arg_host, &bus, &error);
5503                         private_bus = false;
5504                 } else
5505                         assert_not_reached("Uh, invalid transport...");
5506         }
5507
5508         switch (arg_action) {
5509
5510         case ACTION_SYSTEMCTL:
5511                 r = systemctl_main(bus, argc, argv, &error);
5512                 break;
5513
5514         case ACTION_HALT:
5515         case ACTION_POWEROFF:
5516         case ACTION_REBOOT:
5517         case ACTION_KEXEC:
5518                 r = halt_main(bus);
5519                 break;
5520
5521         case ACTION_RUNLEVEL2:
5522         case ACTION_RUNLEVEL3:
5523         case ACTION_RUNLEVEL4:
5524         case ACTION_RUNLEVEL5:
5525         case ACTION_RESCUE:
5526         case ACTION_EMERGENCY:
5527         case ACTION_DEFAULT:
5528                 r = start_with_fallback(bus);
5529                 break;
5530
5531         case ACTION_RELOAD:
5532         case ACTION_REEXEC:
5533                 r = reload_with_fallback(bus);
5534                 break;
5535
5536         case ACTION_CANCEL_SHUTDOWN: {
5537                 char *m = NULL;
5538
5539                 if (arg_wall) {
5540                         m = strv_join(arg_wall, " ");
5541                         if (!m) {
5542                                 retval = EXIT_FAILURE;
5543                                 goto finish;
5544                         }
5545                 }
5546                 r = send_shutdownd(arg_when, SD_SHUTDOWN_NONE, false, !arg_no_wall, m);
5547                 if (r < 0)
5548                         log_warning("Failed to talk to shutdownd, shutdown hasn't been cancelled: %s", strerror(-r));
5549                 free(m);
5550                 break;
5551         }
5552
5553         case ACTION_INVALID:
5554         case ACTION_RUNLEVEL:
5555         default:
5556                 assert_not_reached("Unknown action");
5557         }
5558
5559         retval = r < 0 ? EXIT_FAILURE : r;
5560
5561 finish:
5562         if (bus) {
5563                 dbus_connection_flush(bus);
5564                 dbus_connection_close(bus);
5565                 dbus_connection_unref(bus);
5566         }
5567
5568         dbus_shutdown();
5569
5570         strv_free(arg_property);
5571
5572         pager_close();
5573         ask_password_agent_close();
5574         polkit_agent_close();
5575
5576         return retval;
5577 }