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 char **arg_types = NULL;
  72 static char **arg_states = NULL;
  73 static char **arg_properties = NULL;
  74 static bool arg_all = false;
  75 static enum dependency {
  76         DEPENDENCY_FORWARD,
  77         DEPENDENCY_REVERSE,
  78         DEPENDENCY_AFTER,
  79         DEPENDENCY_BEFORE,
  80 } arg_dependency = DEPENDENCY_FORWARD;
  81 static const char *arg_job_mode = "replace";
  82 static UnitFileScope arg_scope = UNIT_FILE_SYSTEM;
  83 static bool arg_no_block = false;
  84 static bool arg_no_legend = false;
  85 static bool arg_no_pager = false;
  86 static bool arg_no_wtmp = false;
  87 static bool arg_no_wall = false;
  88 static bool arg_no_reload = false;
  89 static bool arg_show_types = false;
  90 static bool arg_ignore_inhibitors = false;
  91 static bool arg_dry = false;
  92 static bool arg_quiet = false;
  93 static bool arg_full = false;
  94 static int arg_force = 0;
  95 static bool arg_ask_password = true;
  96 static bool arg_runtime = false;
  97 static char **arg_wall = NULL;
  98 static const char *arg_kill_who = NULL;
  99 static int arg_signal = SIGTERM;
 100 static const char *arg_root = NULL;
 101 static usec_t arg_when = 0;
 102 static enum action {
 103         ACTION_INVALID,
 104         ACTION_SYSTEMCTL,
 105         ACTION_HALT,
 106         ACTION_POWEROFF,
 107         ACTION_REBOOT,
 108         ACTION_KEXEC,
 109         ACTION_EXIT,
 110         ACTION_SUSPEND,
 111         ACTION_HIBERNATE,
 112         ACTION_HYBRID_SLEEP,
 113         ACTION_RUNLEVEL2,
 114         ACTION_RUNLEVEL3,
 115         ACTION_RUNLEVEL4,
 116         ACTION_RUNLEVEL5,
 117         ACTION_RESCUE,
 118         ACTION_EMERGENCY,
 119         ACTION_DEFAULT,
 120         ACTION_RELOAD,
 121         ACTION_REEXEC,
 122         ACTION_RUNLEVEL,
 123         ACTION_CANCEL_SHUTDOWN,
 124         _ACTION_MAX
 125 } arg_action = ACTION_SYSTEMCTL;
 126 static enum transport {
 127         TRANSPORT_NORMAL,
 128         TRANSPORT_SSH,
 129         TRANSPORT_POLKIT
 130 } arg_transport = TRANSPORT_NORMAL;
 131 static char *arg_host = NULL;
 132 static char *arg_user = NULL;
 133 static unsigned arg_lines = 10;
 134 static OutputMode arg_output = OUTPUT_SHORT;
 135 static bool arg_plain = false;
 136
 137 static bool private_bus = false;
 138
 139 static int daemon_reload(DBusConnection *bus, char **args);
 140 static void halt_now(enum action a);
 141
 142 static void pager_open_if_enabled(void) {
 143
 144         if (arg_no_pager)
 145                 return;
 146
 147         pager_open(false);
 148 }
 149
 150 static void ask_password_agent_open_if_enabled(void) {
 151
 152         /* Open the password agent as a child process if necessary */
 153
 154         if (!arg_ask_password)
 155                 return;
 156
 157         if (arg_scope != UNIT_FILE_SYSTEM)
 158                 return;
 159
 160         ask_password_agent_open();
 161 }
 162
 163 #ifdef HAVE_LOGIND
 164 static void polkit_agent_open_if_enabled(void) {
 165
 166         /* Open the polkit agent as a child process if necessary */
 167
 168         if (!arg_ask_password)
 169                 return;
 170
 171         if (arg_scope != UNIT_FILE_SYSTEM)
 172                 return;
 173
 174         polkit_agent_open();
 175 }
 176 #endif
 177
 178 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
 179         assert(error);
 180
 181         if (!dbus_error_is_set(error))
 182                 return r;
 183
 184         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
 185             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
 186             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
 187             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
 188                 return EXIT_NOPERMISSION;
 189
 190         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
 191                 return EXIT_NOTINSTALLED;
 192
 193         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
 194             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
 195                 return EXIT_NOTIMPLEMENTED;
 196
 197         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
 198                 return EXIT_NOTCONFIGURED;
 199
 200         if (r != 0)
 201                 return r;
 202
 203         return EXIT_FAILURE;
 204 }
 205
 206 static void warn_wall(enum action a) {
 207         static const char *table[_ACTION_MAX] = {
 208                 [ACTION_HALT]            = "The system is going down for system halt NOW!",
 209                 [ACTION_REBOOT]          = "The system is going down for reboot NOW!",
 210                 [ACTION_POWEROFF]        = "The system is going down for power-off NOW!",
 211                 [ACTION_KEXEC]           = "The system is going down for kexec reboot NOW!",
 212                 [ACTION_RESCUE]          = "The system is going down to rescue mode NOW!",
 213                 [ACTION_EMERGENCY]       = "The system is going down to emergency mode NOW!",
 214                 [ACTION_CANCEL_SHUTDOWN] = "The system shutdown has been cancelled NOW!"
 215         };
 216
 217         if (arg_no_wall)
 218                 return;
 219
 220         if (arg_wall) {
 221                 _cleanup_free_ char *p;
 222
 223                 p = strv_join(arg_wall, " ");
 224                 if (!p) {
 225                         log_oom();
 226                         return;
 227                 }
 228
 229                 if (*p) {
 230                         utmp_wall(p, NULL);
 231                         return;
 232                 }
 233         }
 234
 235         if (!table[a])
 236                 return;
 237
 238         utmp_wall(table[a], NULL);
 239 }
 240
 241 static bool avoid_bus(void) {
 242
 243         if (running_in_chroot() > 0)
 244                 return true;
 245
 246         if (sd_booted() <= 0)
 247                 return true;
 248
 249         if (!isempty(arg_root))
 250                 return true;
 251
 252         if (arg_scope == UNIT_FILE_GLOBAL)
 253                 return true;
 254
 255         return false;
 256 }
 257
 258 static int compare_unit_info(const void *a, const void *b) {
 259         const char *d1, *d2;
 260         const struct unit_info *u = a, *v = b;
 261
 262         d1 = strrchr(u->id, '.');
 263         d2 = strrchr(v->id, '.');
 264
 265         if (d1 && d2) {
 266                 int r;
 267
 268                 r = strcasecmp(d1, d2);
 269                 if (r != 0)
 270                         return r;
 271         }
 272
 273         return strcasecmp(u->id, v->id);
 274 }
 275
 276 static bool output_show_unit(const struct unit_info *u) {
 277         const char *dot;
 278
 279         if (!strv_isempty(arg_states))
 280                 return strv_contains(arg_states, u->load_state) || strv_contains(arg_states, u->sub_state) || strv_contains(arg_states, u->active_state);
 281
 282         return (!arg_types || ((dot = strrchr(u->id, '.')) &&
 283                                strv_find(arg_types, dot+1))) &&
 284                 (arg_all || !(streq(u->active_state, "inactive")
 285                               || u->following[0]) || u->job_id > 0);
 286 }
 287
 288 static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
 289         unsigned id_len, max_id_len, active_len, sub_len, job_len, desc_len, n_shown = 0;
 290         const struct unit_info *u;
 291         int job_count = 0;
 292
 293         max_id_len = sizeof("UNIT")-1;
 294         active_len = sizeof("ACTIVE")-1;
 295         sub_len = sizeof("SUB")-1;
 296         job_len = sizeof("JOB")-1;
 297         desc_len = 0;
 298
 299         for (u = unit_infos; u < unit_infos + c; u++) {
 300                 if (!output_show_unit(u))
 301                         continue;
 302
 303                 max_id_len = MAX(max_id_len, strlen(u->id));
 304                 active_len = MAX(active_len, strlen(u->active_state));
 305                 sub_len = MAX(sub_len, strlen(u->sub_state));
 306                 if (u->job_id != 0) {
 307                         job_len = MAX(job_len, strlen(u->job_type));
 308                         job_count++;
 309                 }
 310         }
 311
 312         if (!arg_full) {
 313                 unsigned basic_len;
 314                 id_len = MIN(max_id_len, 25u);
 315                 basic_len = 5 + id_len + 5 + active_len + sub_len;
 316                 if (job_count)
 317                         basic_len += job_len + 1;
 318                 if (basic_len < (unsigned) columns()) {
 319                         unsigned extra_len, incr;
 320                         extra_len = columns() - basic_len;
 321                         /* Either UNIT already got 25, or is fully satisfied.
 322                          * Grant up to 25 to DESC now. */
 323                         incr = MIN(extra_len, 25u);
 324                         desc_len += incr;
 325                         extra_len -= incr;
 326                         /* split the remaining space between UNIT and DESC,
 327                          * but do not give UNIT more than it needs. */
 328                         if (extra_len > 0) {
 329                                 incr = MIN(extra_len / 2, max_id_len - id_len);
 330                                 id_len += incr;
 331                                 desc_len += extra_len - incr;
 332                         }
 333                 }
 334         } else
 335                 id_len = max_id_len;
 336
 337         for (u = unit_infos; u < unit_infos + c; u++) {
 338                 _cleanup_free_ char *e = NULL;
 339                 const char *on_loaded, *off_loaded, *on = "";
 340                 const char *on_active, *off_active, *off = "";
 341
 342                 if (!output_show_unit(u))
 343                         continue;
 344
 345                 if (!n_shown && !arg_no_legend) {
 346                         printf("%-*s %-6s %-*s %-*s ", id_len, "UNIT", "LOAD",
 347                                active_len, "ACTIVE", sub_len, "SUB");
 348                         if (job_count)
 349                                 printf("%-*s ", job_len, "JOB");
 350                         if (!arg_full && arg_no_pager)
 351                                 printf("%.*s\n", desc_len, "DESCRIPTION");
 352                         else
 353                                 printf("%s\n", "DESCRIPTION");
 354                 }
 355
 356                 n_shown++;
 357
 358                 if (streq(u->load_state, "error") ||
 359                     streq(u->load_state, "not-found")) {
 360                         on_loaded = on = ansi_highlight_red();
 361                         off_loaded = off = ansi_highlight_off();
 362                 } else
 363                         on_loaded = off_loaded = "";
 364
 365                 if (streq(u->active_state, "failed")) {
 366                         on_active = on = ansi_highlight_red();
 367                         off_active = off = ansi_highlight_off();
 368                 } else
 369                         on_active = off_active = "";
 370
 371                 e = arg_full ? NULL : ellipsize(u->id, id_len, 33);
 372
 373                 printf("%s%-*s%s %s%-6s%s %s%-*s %-*s%s %-*s",
 374                        on, id_len, e ? e : u->id, off,
 375                        on_loaded, u->load_state, off_loaded,
 376                        on_active, active_len, u->active_state,
 377                        sub_len, u->sub_state, off_active,
 378                        job_count ? job_len + 1 : 0, u->job_id ? u->job_type : "");
 379                 if (!arg_full && arg_no_pager)
 380                         printf("%.*s\n", desc_len, u->description);
 381                 else
 382                         printf("%s\n", u->description);
 383         }
 384
 385         if (!arg_no_legend) {
 386                 const char *on, *off;
 387
 388                 if (n_shown) {
 389                         printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
 390                                "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
 391                                "SUB    = The low-level unit activation state, values depend on unit type.\n");
 392                         if (job_count)
 393                                 printf("JOB    = Pending job for the unit.\n");
 394                         puts("");
 395                         on = ansi_highlight();
 396                         off = ansi_highlight_off();
 397                 } else {
 398                         on = ansi_highlight_red();
 399                         off = ansi_highlight_off();
 400                 }
 401
 402                 if (arg_all)
 403                         printf("%s%u loaded units listed.%s\n"
 404                                "To show all installed unit files use 'systemctl list-unit-files'.\n",
 405                                on, n_shown, off);
 406                 else
 407                         printf("%s%u loaded units listed.%s Pass --all to see loaded but inactive units, too.\n"
 408                                "To show all installed unit files use 'systemctl list-unit-files'.\n",
 409                                on, n_shown, off);
 410         }
 411 }
 412
 413 static int get_unit_list(
 414                 DBusConnection *bus,
 415                 DBusMessage **reply,
 416                 struct unit_info **unit_infos,
 417                 unsigned *c) {
 418
 419         DBusMessageIter iter, sub;
 420         size_t size = 0;
 421         int r;
 422
 423         assert(bus);
 424         assert(unit_infos);
 425         assert(c);
 426
 427         r = bus_method_call_with_reply(
 428                         bus,
 429                         "org.freedesktop.systemd1",
 430                         "/org/freedesktop/systemd1",
 431                         "org.freedesktop.systemd1.Manager",
 432                         "ListUnits",
 433                         reply,
 434                         NULL,
 435                         DBUS_TYPE_INVALID);
 436         if (r < 0)
 437                 return r;
 438
 439         if (!dbus_message_iter_init(*reply, &iter) ||
 440             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 441             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 442                 log_error("Failed to parse reply.");
 443                 return -EIO;
 444         }
 445
 446         dbus_message_iter_recurse(&iter, &sub);
 447
 448         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 449                 if (!GREEDY_REALLOC(*unit_infos, size, *c + 1))
 450                         return log_oom();
 451
 452                 bus_parse_unit_info(&sub, *unit_infos + *c);
 453                 (*c)++;
 454
 455                 dbus_message_iter_next(&sub);
 456         }
 457
 458         return 0;
 459 }
 460
 461 static int list_units(DBusConnection *bus, char **args) {
 462         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
 463         _cleanup_free_ struct unit_info *unit_infos = NULL;
 464         unsigned c = 0;
 465         int r;
 466
 467         pager_open_if_enabled();
 468
 469         r = get_unit_list(bus, &reply, &unit_infos, &c);
 470         if (r < 0)
 471                 return r;
 472
 473         qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
 474
 475         output_units_list(unit_infos, c);
 476
 477         return 0;
 478 }
 479
 480 static int get_triggered_units(
 481                 DBusConnection *bus,
 482                 const char* unit_path,
 483                 char*** triggered) {
 484
 485         const char *interface = "org.freedesktop.systemd1.Unit",
 486                    *triggers_property = "Triggers";
 487         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
 488         DBusMessageIter iter, sub;
 489         int r;
 490
 491         r = bus_method_call_with_reply(bus,
 492                                        "org.freedesktop.systemd1",
 493                                        unit_path,
 494                                        "org.freedesktop.DBus.Properties",
 495                                        "Get",
 496                                        &reply,
 497                                        NULL,
 498                                        DBUS_TYPE_STRING, &interface,
 499                                        DBUS_TYPE_STRING, &triggers_property,
 500                                        DBUS_TYPE_INVALID);
 501         if (r < 0)
 502                 return r;
 503
 504         if (!dbus_message_iter_init(reply, &iter) ||
 505             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
 506                 log_error("Failed to parse reply.");
 507                 return -EBADMSG;
 508         }
 509
 510         dbus_message_iter_recurse(&iter, &sub);
 511         dbus_message_iter_recurse(&sub, &iter);
 512         sub = iter;
 513
 514         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 515                 const char *unit;
 516
 517                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
 518                         log_error("Failed to parse reply.");
 519                         return -EBADMSG;
 520                 }
 521
 522                 dbus_message_iter_get_basic(&sub, &unit);
 523                 r = strv_extend(triggered, unit);
 524                 if (r < 0)
 525                         return r;
 526
 527                 dbus_message_iter_next(&sub);
 528         }
 529
 530         return 0;
 531 }
 532
 533 static int get_listening(DBusConnection *bus, const char* unit_path,
 534                          char*** listen, unsigned *c)
 535 {
 536         const char *interface = "org.freedesktop.systemd1.Socket",
 537                    *listen_property = "Listen";
 538         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
 539         DBusMessageIter iter, sub;
 540         int r;
 541
 542         r = bus_method_call_with_reply(bus,
 543                                        "org.freedesktop.systemd1",
 544                                        unit_path,
 545                                        "org.freedesktop.DBus.Properties",
 546                                        "Get",
 547                                        &reply,
 548                                        NULL,
 549                                        DBUS_TYPE_STRING, &interface,
 550                                        DBUS_TYPE_STRING, &listen_property,
 551                                        DBUS_TYPE_INVALID);
 552         if (r < 0)
 553                 return r;
 554
 555         if (!dbus_message_iter_init(reply, &iter) ||
 556             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
 557                 log_error("Failed to parse reply.");
 558                 return -EBADMSG;
 559         }
 560
 561         dbus_message_iter_recurse(&iter, &sub);
 562         dbus_message_iter_recurse(&sub, &iter);
 563         sub = iter;
 564
 565         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 566                 DBusMessageIter sub2;
 567                 const char *type, *path;
 568
 569                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 570                         log_error("Failed to parse reply.");
 571                         return -EBADMSG;
 572                 }
 573
 574                 dbus_message_iter_recurse(&sub, &sub2);
 575
 576                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
 577                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0) {
 578                         r = strv_extend(listen, type);
 579                         if (r < 0)
 580                                 return r;
 581
 582                         r = strv_extend(listen, path);
 583                         if (r < 0)
 584                                 return r;
 585
 586                         (*c) ++;
 587                 }
 588
 589                 dbus_message_iter_next(&sub);
 590         }
 591
 592         return 0;
 593 }
 594
 595 struct socket_info {
 596         const char* id;
 597
 598         char* type;
 599         char* path;
 600
 601         /* Note: triggered is a list here, although it almost certainly
 602          * will always be one unit. Nevertheless, dbus API allows for multiple
 603          * values, so let's follow that.*/
 604         char** triggered;
 605
 606         /* The strv above is shared. free is set only in the first one. */
 607         bool own_triggered;
 608 };
 609
 610 static int socket_info_compare(struct socket_info *a, struct socket_info *b) {
 611         int o = strcmp(a->path, b->path);
 612         if (o == 0)
 613                 o = strcmp(a->type, b->type);
 614         return o;
 615 }
 616
 617 static int output_sockets_list(struct socket_info *socket_infos, unsigned cs) {
 618         struct socket_info *s;
 619         unsigned pathlen = sizeof("LISTEN") - 1,
 620                 typelen = (sizeof("TYPE") - 1) * arg_show_types,
 621                 socklen = sizeof("UNIT") - 1,
 622                 servlen = sizeof("ACTIVATES") - 1;
 623         const char *on, *off;
 624
 625         for (s = socket_infos; s < socket_infos + cs; s++) {
 626                 char **a;
 627                 unsigned tmp = 0;
 628
 629                 socklen = MAX(socklen, strlen(s->id));
 630                 if (arg_show_types)
 631                         typelen = MAX(typelen, strlen(s->type));
 632                 pathlen = MAX(pathlen, strlen(s->path));
 633
 634                 STRV_FOREACH(a, s->triggered)
 635                         tmp += strlen(*a) + 2*(a != s->triggered);
 636                 servlen = MAX(servlen, tmp);
 637         }
 638
 639         if (cs) {
 640                 if (!arg_no_legend)
 641                         printf("%-*s %-*.*s%-*s %s\n",
 642                                pathlen, "LISTEN",
 643                                typelen + arg_show_types, typelen + arg_show_types, "TYPE ",
 644                                socklen, "UNIT",
 645                                "ACTIVATES");
 646
 647                 for (s = socket_infos; s < socket_infos + cs; s++) {
 648                         char **a;
 649
 650                         if (arg_show_types)
 651                                 printf("%-*s %-*s %-*s",
 652                                        pathlen, s->path, typelen, s->type, socklen, s->id);
 653                         else
 654                                 printf("%-*s %-*s",
 655                                        pathlen, s->path, socklen, s->id);
 656                         STRV_FOREACH(a, s->triggered)
 657                                 printf("%s %s",
 658                                        a == s->triggered ? "" : ",", *a);
 659                         printf("\n");
 660                 }
 661
 662                 on = ansi_highlight();
 663                 off = ansi_highlight_off();
 664                 if (!arg_no_legend)
 665                         printf("\n");
 666         } else {
 667                 on = ansi_highlight_red();
 668                 off = ansi_highlight_off();
 669         }
 670
 671         if (!arg_no_legend) {
 672                 printf("%s%u sockets listed.%s\n", on, cs, off);
 673                 if (!arg_all)
 674                         printf("Pass --all to see loaded but inactive sockets, too.\n");
 675         }
 676
 677         return 0;
 678 }
 679
 680 static int list_sockets(DBusConnection *bus, char **args) {
 681         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
 682         _cleanup_free_ struct unit_info *unit_infos = NULL;
 683         struct socket_info *socket_infos = NULL;
 684         const struct unit_info *u;
 685         struct socket_info *s;
 686         unsigned cu = 0, cs = 0;
 687         size_t size = 0;
 688         int r;
 689
 690         pager_open_if_enabled();
 691
 692         r = get_unit_list(bus, &reply, &unit_infos, &cu);
 693         if (r < 0)
 694                 return r;
 695
 696         for (u = unit_infos; u < unit_infos + cu; u++) {
 697                 const char *dot;
 698                 _cleanup_strv_free_ char **listen = NULL, **triggered = NULL;
 699                 unsigned c = 0, i;
 700
 701                 if (!output_show_unit(u))
 702                         continue;
 703
 704                 if ((dot = strrchr(u->id, '.')) && !streq(dot+1, "socket"))
 705                         continue;
 706
 707                 r = get_triggered_units(bus, u->unit_path, &triggered);
 708                 if (r < 0)
 709                         goto cleanup;
 710
 711                 r = get_listening(bus, u->unit_path, &listen, &c);
 712                 if (r < 0)
 713                         goto cleanup;
 714
 715                 if (!GREEDY_REALLOC(socket_infos, size, cs + c)) {
 716                         r = log_oom();
 717                         goto cleanup;
 718                 }
 719
 720                 for (i = 0; i < c; i++)
 721                         socket_infos[cs + i] = (struct socket_info) {
 722                                 .id = u->id,
 723                                 .type = listen[i*2],
 724                                 .path = listen[i*2 + 1],
 725                                 .triggered = triggered,
 726                                 .own_triggered = i==0,
 727                         };
 728
 729                 /* from this point on we will cleanup those socket_infos */
 730                 cs += c;
 731                 free(listen);
 732                 listen = triggered = NULL; /* avoid cleanup */
 733         }
 734
 735         qsort(socket_infos, cs, sizeof(struct socket_info),
 736               (__compar_fn_t) socket_info_compare);
 737
 738         output_sockets_list(socket_infos, cs);
 739
 740  cleanup:
 741         assert(cs == 0 || socket_infos);
 742         for (s = socket_infos; s < socket_infos + cs; s++) {
 743                 free(s->type);
 744                 free(s->path);
 745                 if (s->own_triggered)
 746                         strv_free(s->triggered);
 747         }
 748         free(socket_infos);
 749
 750         return 0;
 751 }
 752
 753 static int compare_unit_file_list(const void *a, const void *b) {
 754         const char *d1, *d2;
 755         const UnitFileList *u = a, *v = b;
 756
 757         d1 = strrchr(u->path, '.');
 758         d2 = strrchr(v->path, '.');
 759
 760         if (d1 && d2) {
 761                 int r;
 762
 763                 r = strcasecmp(d1, d2);
 764                 if (r != 0)
 765                         return r;
 766         }
 767
 768         return strcasecmp(path_get_file_name(u->path), path_get_file_name(v->path));
 769 }
 770
 771 static bool output_show_unit_file(const UnitFileList *u) {
 772         const char *dot;
 773
 774         return !arg_types || ((dot = strrchr(u->path, '.')) && strv_find(arg_types, dot+1));
 775 }
 776
 777 static void output_unit_file_list(const UnitFileList *units, unsigned c) {
 778         unsigned max_id_len, id_cols, state_cols, n_shown = 0;
 779         const UnitFileList *u;
 780
 781         max_id_len = sizeof("UNIT FILE")-1;
 782         state_cols = sizeof("STATE")-1;
 783         for (u = units; u < units + c; u++) {
 784                 if (!output_show_unit_file(u))
 785                         continue;
 786
 787                 max_id_len = MAX(max_id_len, strlen(path_get_file_name(u->path)));
 788                 state_cols = MAX(state_cols, strlen(unit_file_state_to_string(u->state)));
 789         }
 790
 791         if (!arg_full) {
 792                 unsigned basic_cols;
 793                 id_cols = MIN(max_id_len, 25u);
 794                 basic_cols = 1 + id_cols + state_cols;
 795                 if (basic_cols < (unsigned) columns())
 796                         id_cols += MIN(columns() - basic_cols, max_id_len - id_cols);
 797         } else
 798                 id_cols = max_id_len;
 799
 800         if (!arg_no_legend)
 801                 printf("%-*s %-*s\n", id_cols, "UNIT FILE", state_cols, "STATE");
 802
 803         for (u = units; u < units + c; u++) {
 804                 _cleanup_free_ char *e = NULL;
 805                 const char *on, *off;
 806                 const char *id;
 807
 808                 if (!output_show_unit_file(u))
 809                         continue;
 810
 811                 n_shown++;
 812
 813                 if (u->state == UNIT_FILE_MASKED ||
 814                     u->state == UNIT_FILE_MASKED_RUNTIME ||
 815                     u->state == UNIT_FILE_DISABLED ||
 816                     u->state == UNIT_FILE_INVALID) {
 817                         on  = ansi_highlight_red();
 818                         off = ansi_highlight_off();
 819                 } else if (u->state == UNIT_FILE_ENABLED) {
 820                         on  = ansi_highlight_green();
 821                         off = ansi_highlight_off();
 822                 } else
 823                         on = off = "";
 824
 825                 id = path_get_file_name(u->path);
 826
 827                 e = arg_full ? NULL : ellipsize(id, id_cols, 33);
 828
 829                 printf("%-*s %s%-*s%s\n",
 830                        id_cols, e ? e : id,
 831                        on, state_cols, unit_file_state_to_string(u->state), off);
 832         }
 833
 834         if (!arg_no_legend)
 835                 printf("\n%u unit files listed.\n", n_shown);
 836 }
 837
 838 static int list_unit_files(DBusConnection *bus, char **args) {
 839         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
 840         _cleanup_free_ UnitFileList *units = NULL;
 841         DBusMessageIter iter, sub, sub2;
 842         unsigned c = 0, n_units = 0;
 843         int r;
 844
 845         pager_open_if_enabled();
 846
 847         if (avoid_bus()) {
 848                 Hashmap *h;
 849                 UnitFileList *u;
 850                 Iterator i;
 851
 852                 h = hashmap_new(string_hash_func, string_compare_func);
 853                 if (!h)
 854                         return log_oom();
 855
 856                 r = unit_file_get_list(arg_scope, arg_root, h);
 857                 if (r < 0) {
 858                         unit_file_list_free(h);
 859                         log_error("Failed to get unit file list: %s", strerror(-r));
 860                         return r;
 861                 }
 862
 863                 n_units = hashmap_size(h);
 864                 units = new(UnitFileList, n_units);
 865                 if (!units) {
 866                         unit_file_list_free(h);
 867                         return log_oom();
 868                 }
 869
 870                 HASHMAP_FOREACH(u, h, i) {
 871                         memcpy(units + c++, u, sizeof(UnitFileList));
 872                         free(u);
 873                 }
 874
 875                 hashmap_free(h);
 876         } else {
 877                 r = bus_method_call_with_reply(
 878                                 bus,
 879                                 "org.freedesktop.systemd1",
 880                                 "/org/freedesktop/systemd1",
 881                                 "org.freedesktop.systemd1.Manager",
 882                                 "ListUnitFiles",
 883                                 &reply,
 884                                 NULL,
 885                                 DBUS_TYPE_INVALID);
 886                 if (r < 0)
 887                         return r;
 888
 889                 if (!dbus_message_iter_init(reply, &iter) ||
 890                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 891                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 892                         log_error("Failed to parse reply.");
 893                         return -EIO;
 894                 }
 895
 896                 dbus_message_iter_recurse(&iter, &sub);
 897
 898                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 899                         UnitFileList *u;
 900                         const char *state;
 901
 902                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT);
 903
 904                         if (c >= n_units) {
 905                                 UnitFileList *w;
 906
 907                                 n_units = MAX(2*c, 16u);
 908                                 w = realloc(units, sizeof(struct UnitFileList) * n_units);
 909                                 if (!w)
 910                                         return log_oom();
 911
 912                                 units = w;
 913                         }
 914
 915                         u = units + c;
 916
 917                         dbus_message_iter_recurse(&sub, &sub2);
 918
 919                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->path, true) < 0 ||
 920                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, false) < 0) {
 921                                 log_error("Failed to parse reply.");
 922                                 return -EIO;
 923                         }
 924
 925                         u->state = unit_file_state_from_string(state);
 926
 927                         dbus_message_iter_next(&sub);
 928                         c++;
 929                 }
 930         }
 931
 932         if (c > 0) {
 933                 qsort(units, c, sizeof(UnitFileList), compare_unit_file_list);
 934                 output_unit_file_list(units, c);
 935         }
 936
 937         return 0;
 938 }
 939
 940 static int list_dependencies_print(const char *name, int level, unsigned int branches, bool last) {
 941         int i;
 942         _cleanup_free_ char *n = NULL;
 943         size_t len = 0;
 944         size_t max_len = MAX(columns(),20u);
 945
 946         if (!arg_plain) {
 947                 for (i = level - 1; i >= 0; i--) {
 948                         len += 2;
 949                         if(len > max_len - 3 && !arg_full) {
 950                                 printf("%s...\n",max_len % 2 ? "" : " ");
 951                                 return 0;
 952                         }
 953                         printf("%s", draw_special_char(branches & (1 << i) ? DRAW_TREE_VERT : DRAW_TREE_SPACE));
 954                 }
 955                 len += 2;
 956                 if(len > max_len - 3 && !arg_full) {
 957                         printf("%s...\n",max_len % 2 ? "" : " ");
 958                         return 0;
 959                 }
 960                 printf("%s", draw_special_char(last ? DRAW_TREE_RIGHT : DRAW_TREE_BRANCH));
 961         }
 962
 963         if(arg_full){
 964                 printf("%s\n", name);
 965                 return 0;
 966         }
 967
 968         n = ellipsize(name, max_len-len, 100);
 969         if(!n)
 970                 return log_oom();
 971
 972         printf("%s\n", n);
 973         return 0;
 974 }
 975
 976 static int list_dependencies_get_dependencies(DBusConnection *bus, const char *name, char ***deps) {
 977         static const char *dependencies[] = {
 978                 [DEPENDENCY_FORWARD] = "Requires\0"
 979                                        "RequiresOverridable\0"
 980                                        "Requisite\0"
 981                                        "RequisiteOverridable\0"
 982                                        "Wants\0",
 983                 [DEPENDENCY_REVERSE] = "RequiredBy\0"
 984                                        "RequiredByOverridable\0"
 985                                        "WantedBy\0"
 986                                        "PartOf\0",
 987                 [DEPENDENCY_AFTER]   = "After\0",
 988                 [DEPENDENCY_BEFORE]  = "Before\0",
 989         };
 990
 991         _cleanup_free_ char *path;
 992         const char *interface = "org.freedesktop.systemd1.Unit";
 993
 994         _cleanup_dbus_message_unref_  DBusMessage *reply = NULL;
 995         DBusMessageIter iter, sub, sub2, sub3;
 996
 997         int r = 0;
 998         char **ret = NULL;
 999
1000         assert(bus);
1001         assert(name);
1002         assert(deps);
1003
1004         path = unit_dbus_path_from_name(name);
1005         if (path == NULL) {
1006                 r = -EINVAL;
1007                 goto finish;
1008         }
1009
1010         r = bus_method_call_with_reply(
1011                 bus,
1012                 "org.freedesktop.systemd1",
1013                 path,
1014                 "org.freedesktop.DBus.Properties",
1015                 "GetAll",
1016                 &reply,
1017                 NULL,
1018                 DBUS_TYPE_STRING, &interface,
1019                 DBUS_TYPE_INVALID);
1020         if (r < 0)
1021                 goto finish;
1022
1023         if (!dbus_message_iter_init(reply, &iter) ||
1024                 dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1025                 dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY) {
1026                 log_error("Failed to parse reply.");
1027                 r = -EIO;
1028                 goto finish;
1029         }
1030
1031         dbus_message_iter_recurse(&iter, &sub);
1032
1033         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1034                 const char *prop;
1035
1036                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_DICT_ENTRY);
1037                 dbus_message_iter_recurse(&sub, &sub2);
1038
1039                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
1040                         log_error("Failed to parse reply.");
1041                         r = -EIO;
1042                         goto finish;
1043                 }
1044
1045                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT) {
1046                         log_error("Failed to parse reply.");
1047                         r = -EIO;
1048                         goto finish;
1049                 }
1050
1051                 dbus_message_iter_recurse(&sub2, &sub3);
1052                 dbus_message_iter_next(&sub);
1053
1054                 assert(arg_dependency < ELEMENTSOF(dependencies));
1055                 if (!nulstr_contains(dependencies[arg_dependency], prop))
1056                         continue;
1057
1058                 if (dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_ARRAY) {
1059                         if (dbus_message_iter_get_element_type(&sub3) == DBUS_TYPE_STRING) {
1060                                 DBusMessageIter sub4;
1061                                 dbus_message_iter_recurse(&sub3, &sub4);
1062
1063                                 while (dbus_message_iter_get_arg_type(&sub4) != DBUS_TYPE_INVALID) {
1064                                         const char *s;
1065
1066                                         assert(dbus_message_iter_get_arg_type(&sub4) == DBUS_TYPE_STRING);
1067                                         dbus_message_iter_get_basic(&sub4, &s);
1068
1069                                         r = strv_extend(&ret, s);
1070                                         if (r < 0) {
1071                                                 log_oom();
1072                                                 goto finish;
1073                                         }
1074
1075                                         dbus_message_iter_next(&sub4);
1076                                 }
1077                         }
1078                 }
1079         }
1080 finish:
1081         if (r < 0)
1082                 strv_free(ret);
1083         else
1084                 *deps = ret;
1085         return r;
1086 }
1087
1088 static int list_dependencies_compare(const void *_a, const void *_b) {
1089         const char **a = (const char**) _a, **b = (const char**) _b;
1090         if (unit_name_to_type(*a) == UNIT_TARGET && unit_name_to_type(*b) != UNIT_TARGET)
1091                 return 1;
1092         if (unit_name_to_type(*a) != UNIT_TARGET && unit_name_to_type(*b) == UNIT_TARGET)
1093                 return -1;
1094         return strcasecmp(*a, *b);
1095 }
1096
1097 static int list_dependencies_one(DBusConnection *bus, const char *name, int level, char ***units, unsigned int branches) {
1098         _cleanup_strv_free_ char **deps = NULL, **u;
1099         char **c;
1100         int r = 0;
1101
1102         u = strv_append(*units, name);
1103         if (!u)
1104                 return log_oom();
1105
1106         r = list_dependencies_get_dependencies(bus, name, &deps);
1107         if (r < 0)
1108                 return r;
1109
1110         qsort(deps, strv_length(deps), sizeof (char*), list_dependencies_compare);
1111
1112         STRV_FOREACH(c, deps) {
1113                 if (strv_contains(u, *c)) {
1114                         if (!arg_plain) {
1115                                 r = list_dependencies_print("...", level + 1, (branches << 1) | (c[1] == NULL ? 0 : 1), 1);
1116                                 if (r < 0)
1117                                         return r;
1118                         }
1119                         continue;
1120                 }
1121
1122                 r = list_dependencies_print(*c, level, branches, c[1] == NULL);
1123                 if (r < 0)
1124                         return r;
1125
1126                 if (arg_all || unit_name_to_type(*c) == UNIT_TARGET) {
1127                        r = list_dependencies_one(bus, *c, level + 1, &u, (branches << 1) | (c[1] == NULL ? 0 : 1));
1128                        if(r < 0)
1129                                return r;
1130                 }
1131         }
1132         if (arg_plain) {
1133                 strv_free(*units);
1134                 *units = u;
1135                 u = NULL;
1136         }
1137         return 0;
1138 }
1139
1140 static int list_dependencies(DBusConnection *bus, char **args) {
1141         _cleanup_free_ char *unit = NULL;
1142         _cleanup_strv_free_ char **units = NULL;
1143         const char *u;
1144
1145         assert(bus);
1146
1147         if (args[1]) {
1148                 unit = unit_name_mangle(args[1]);
1149                 if (!unit)
1150                         return log_oom();
1151                 u = unit;
1152         } else
1153                 u = SPECIAL_DEFAULT_TARGET;
1154
1155         pager_open_if_enabled();
1156
1157         puts(u);
1158
1159         return list_dependencies_one(bus, u, 0, &units, 0);
1160 }
1161
1162 static int get_default(DBusConnection *bus, char **args) {
1163         char *path = NULL;
1164         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1165         int r;
1166         _cleanup_dbus_error_free_ DBusError error;
1167
1168         dbus_error_init(&error);
1169
1170         if (!bus || avoid_bus()) {
1171                 r = unit_file_get_default(arg_scope, arg_root, &path);
1172
1173                 if (r < 0) {
1174                         log_error("Operation failed: %s", strerror(-r));
1175                         goto finish;
1176                 }
1177
1178                 r = 0;
1179         } else {
1180                 r = bus_method_call_with_reply(
1181                         bus,
1182                         "org.freedesktop.systemd1",
1183                         "/org/freedesktop/systemd1",
1184                         "org.freedesktop.systemd1.Manager",
1185                         "GetDefaultTarget",
1186                         &reply,
1187                         NULL,
1188                         DBUS_TYPE_INVALID);
1189
1190                 if (r < 0) {
1191                         log_error("Operation failed: %s", strerror(-r));
1192                         goto finish;
1193                 }
1194
1195                 if (!dbus_message_get_args(reply, &error,
1196                                    DBUS_TYPE_STRING, &path,
1197                                    DBUS_TYPE_INVALID)) {
1198                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1199                         dbus_error_free(&error);
1200                         return  -EIO;
1201                 }
1202         }
1203
1204         if (path)
1205                 printf("%s\n", path);
1206
1207 finish:
1208         if ((!bus || avoid_bus()) && path)
1209                 free(path);
1210
1211         return r;
1212
1213 }
1214
1215 struct job_info {
1216         uint32_t id;
1217         char *name, *type, *state;
1218 };
1219
1220 static void list_jobs_print(struct job_info* jobs, size_t n) {
1221         size_t i;
1222         struct job_info *j;
1223         const char *on, *off;
1224         bool shorten = false;
1225
1226         assert(n == 0 || jobs);
1227
1228         if (n == 0) {
1229                 on = ansi_highlight_green();
1230                 off = ansi_highlight_off();
1231
1232                 printf("%sNo jobs running.%s\n", on, off);
1233                 return;
1234         }
1235
1236         pager_open_if_enabled();
1237
1238         {
1239                 /* JOB UNIT TYPE STATE */
1240                 unsigned l0 = 3, l1 = 4, l2 = 4, l3 = 5;
1241
1242                 for (i = 0, j = jobs; i < n; i++, j++) {
1243                         assert(j->name && j->type && j->state);
1244                         l0 = MAX(l0, DECIMAL_STR_WIDTH(j->id));
1245                         l1 = MAX(l1, strlen(j->name));
1246                         l2 = MAX(l2, strlen(j->type));
1247                         l3 = MAX(l3, strlen(j->state));
1248                 }
1249
1250                 if (!arg_full && l0 + 1 + l1 + l2 + 1 + l3 > columns()) {
1251                         l1 = MAX(33u, columns() - l0 - l2 - l3 - 3);
1252                         shorten = true;
1253                 }
1254
1255                 if (on_tty())
1256                         printf("%*s %-*s %-*s %-*s\n",
1257                                l0, "JOB",
1258                                l1, "UNIT",
1259                                l2, "TYPE",
1260                                l3, "STATE");
1261
1262                 for (i = 0, j = jobs; i < n; i++, j++) {
1263                         _cleanup_free_ char *e = NULL;
1264
1265                         if (streq(j->state, "running")) {
1266                                 on = ansi_highlight();
1267                                 off = ansi_highlight_off();
1268                         } else
1269                                 on = off = "";
1270
1271                         e = shorten ? ellipsize(j->name, l1, 33) : NULL;
1272                         printf("%*u %s%-*s%s %-*s %s%-*s%s\n",
1273                                l0, j->id,
1274                                on, l1, e ? e : j->name, off,
1275                                l2, j->type,
1276                                on, l3, j->state, off);
1277                 }
1278         }
1279
1280         on = ansi_highlight();
1281         off = ansi_highlight_off();
1282
1283         if (on_tty())
1284                 printf("\n%s%zu jobs listed%s.\n", on, n, off);
1285 }
1286
1287 static int list_jobs(DBusConnection *bus, char **args) {
1288         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1289         DBusMessageIter iter, sub, sub2;
1290         int r;
1291         struct job_info *jobs = NULL;
1292         size_t size = 0, used = 0;
1293
1294         r = bus_method_call_with_reply(
1295                         bus,
1296                         "org.freedesktop.systemd1",
1297                         "/org/freedesktop/systemd1",
1298                         "org.freedesktop.systemd1.Manager",
1299                         "ListJobs",
1300                         &reply,
1301                         NULL,
1302                         DBUS_TYPE_INVALID);
1303         if (r < 0)
1304                 return r;
1305
1306         if (!dbus_message_iter_init(reply, &iter) ||
1307             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
1308             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
1309                 log_error("Failed to parse reply.");
1310                 return -EIO;
1311         }
1312
1313         dbus_message_iter_recurse(&iter, &sub);
1314
1315         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1316                 const char *name, *type, *state, *job_path, *unit_path;
1317                 uint32_t id;
1318
1319                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
1320                         log_error("Failed to parse reply.");
1321                         return -EIO;
1322                 }
1323
1324                 dbus_message_iter_recurse(&sub, &sub2);
1325
1326                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
1327                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
1328                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
1329                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
1330                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
1331                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
1332                         log_error("Failed to parse reply.");
1333                         r = -EIO;
1334                         goto finish;
1335                 }
1336
1337                 if (!GREEDY_REALLOC(jobs, size, used + 1)) {
1338                         r = log_oom();
1339                         goto finish;
1340                 }
1341
1342                 jobs[used++] = (struct job_info) { id,
1343                                                    strdup(name),
1344                                                    strdup(type),
1345                                                    strdup(state) };
1346                 if (!jobs[used-1].name || !jobs[used-1].type || !jobs[used-1].state) {
1347                         r = log_oom();
1348                         goto finish;
1349                 }
1350
1351                 dbus_message_iter_next(&sub);
1352         }
1353
1354         list_jobs_print(jobs, used);
1355
1356  finish:
1357         while (used--) {
1358                 free(jobs[used].name);
1359                 free(jobs[used].type);
1360                 free(jobs[used].state);
1361         }
1362         free(jobs);
1363
1364         return 0;
1365 }
1366
1367 static int cancel_job(DBusConnection *bus, char **args) {
1368         char **name;
1369
1370         assert(args);
1371
1372         if (strv_length(args) <= 1)
1373                 return daemon_reload(bus, args);
1374
1375         STRV_FOREACH(name, args+1) {
1376                 uint32_t id;
1377                 int r;
1378
1379                 r = safe_atou32(*name, &id);
1380                 if (r < 0) {
1381                         log_error("Failed to parse job id: %s", strerror(-r));
1382                         return r;
1383                 }
1384
1385                 r = bus_method_call_with_reply(
1386                                 bus,
1387                                 "org.freedesktop.systemd1",
1388                                 "/org/freedesktop/systemd1",
1389                                 "org.freedesktop.systemd1.Manager",
1390                                 "CancelJob",
1391                                 NULL,
1392                                 NULL,
1393                                 DBUS_TYPE_UINT32, &id,
1394                                 DBUS_TYPE_INVALID);
1395                 if (r < 0)
1396                         return r;
1397         }
1398
1399         return 0;
1400 }
1401
1402 static int need_daemon_reload(DBusConnection *bus, const char *unit) {
1403         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1404         _cleanup_dbus_error_free_ DBusError error;
1405         dbus_bool_t b = FALSE;
1406         DBusMessageIter iter, sub;
1407         const char
1408                 *interface = "org.freedesktop.systemd1.Unit",
1409                 *property = "NeedDaemonReload",
1410                 *path;
1411         _cleanup_free_ char *n = NULL;
1412         int r;
1413
1414         dbus_error_init(&error);
1415
1416         /* We ignore all errors here, since this is used to show a warning only */
1417
1418         n = unit_name_mangle(unit);
1419         if (!n)
1420                 return log_oom();
1421
1422         r = bus_method_call_with_reply(
1423                         bus,
1424                         "org.freedesktop.systemd1",
1425                         "/org/freedesktop/systemd1",
1426                         "org.freedesktop.systemd1.Manager",
1427                         "GetUnit",
1428                         &reply,
1429                         &error,
1430                         DBUS_TYPE_STRING, &n,
1431                         DBUS_TYPE_INVALID);
1432         if (r < 0)
1433                 return r;
1434
1435         if (!dbus_message_get_args(reply, NULL,
1436                                    DBUS_TYPE_OBJECT_PATH, &path,
1437                                    DBUS_TYPE_INVALID))
1438                 return -EIO;
1439
1440         dbus_message_unref(reply);
1441         reply = NULL;
1442
1443         r = bus_method_call_with_reply(
1444                         bus,
1445                         "org.freedesktop.systemd1",
1446                         path,
1447                         "org.freedesktop.DBus.Properties",
1448                         "Get",
1449                         &reply,
1450                         &error,
1451                         DBUS_TYPE_STRING, &interface,
1452                         DBUS_TYPE_STRING, &property,
1453                         DBUS_TYPE_INVALID);
1454         if (r < 0)
1455                 return r;
1456
1457         if (!dbus_message_iter_init(reply, &iter) ||
1458             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
1459                 return -EIO;
1460
1461         dbus_message_iter_recurse(&iter, &sub);
1462         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
1463                 return -EIO;
1464
1465         dbus_message_iter_get_basic(&sub, &b);
1466         return b;
1467 }
1468
1469 typedef struct WaitData {
1470         Set *set;
1471
1472         char *name;
1473         char *result;
1474 } WaitData;
1475
1476 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
1477         _cleanup_dbus_error_free_ DBusError error;
1478         WaitData *d = data;
1479
1480         dbus_error_init(&error);
1481
1482         assert(connection);
1483         assert(message);
1484         assert(d);
1485
1486         log_debug("Got D-Bus request: %s.%s() on %s",
1487                   dbus_message_get_interface(message),
1488                   dbus_message_get_member(message),
1489                   dbus_message_get_path(message));
1490
1491         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1492                 log_error("Warning! D-Bus connection terminated.");
1493                 dbus_connection_close(connection);
1494
1495         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1496                 uint32_t id;
1497                 const char *path, *result, *unit;
1498
1499                 if (dbus_message_get_args(message, &error,
1500                                           DBUS_TYPE_UINT32, &id,
1501                                           DBUS_TYPE_OBJECT_PATH, &path,
1502                                           DBUS_TYPE_STRING, &unit,
1503                                           DBUS_TYPE_STRING, &result,
1504                                           DBUS_TYPE_INVALID)) {
1505
1506                         free(set_remove(d->set, (char*) path));
1507
1508                         if (!isempty(result))
1509                                 d->result = strdup(result);
1510
1511                         if (!isempty(unit))
1512                                 d->name = strdup(unit);
1513
1514                         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1515                 }
1516 #ifndef NOLEGACY
1517                 dbus_error_free(&error);
1518                 if (dbus_message_get_args(message, &error,
1519                                           DBUS_TYPE_UINT32, &id,
1520                                           DBUS_TYPE_OBJECT_PATH, &path,
1521                                           DBUS_TYPE_STRING, &result,
1522                                           DBUS_TYPE_INVALID)) {
1523                         /* Compatibility with older systemd versions <
1524                          * 183 during upgrades. This should be dropped
1525                          * one day. */
1526                         free(set_remove(d->set, (char*) path));
1527
1528                         if (*result)
1529                                 d->result = strdup(result);
1530
1531                         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1532                 }
1533 #endif
1534
1535                 log_error("Failed to parse message: %s", bus_error_message(&error));
1536         }
1537
1538         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1539 }
1540
1541 static int enable_wait_for_jobs(DBusConnection *bus) {
1542         DBusError error;
1543
1544         assert(bus);
1545
1546         if (private_bus)
1547                 return 0;
1548
1549         dbus_error_init(&error);
1550         dbus_bus_add_match(bus,
1551                            "type='signal',"
1552                            "sender='org.freedesktop.systemd1',"
1553                            "interface='org.freedesktop.systemd1.Manager',"
1554                            "member='JobRemoved',"
1555                            "path='/org/freedesktop/systemd1'",
1556                            &error);
1557
1558         if (dbus_error_is_set(&error)) {
1559                 log_error("Failed to add match: %s", bus_error_message(&error));
1560                 dbus_error_free(&error);
1561                 return -EIO;
1562         }
1563
1564         /* This is slightly dirty, since we don't undo the match registrations. */
1565         return 0;
1566 }
1567
1568 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1569         int r = 0;
1570         WaitData d = { .set = s };
1571
1572         assert(bus);
1573         assert(s);
1574
1575         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL))
1576                 return log_oom();
1577
1578         while (!set_isempty(s)) {
1579
1580                 if (!dbus_connection_read_write_dispatch(bus, -1)) {
1581                         log_error("Disconnected from bus.");
1582                         return -ECONNREFUSED;
1583                 }
1584
1585                 if (!d.result)
1586                         goto free_name;
1587
1588                 if (!arg_quiet) {
1589                         if (streq(d.result, "timeout"))
1590                                 log_error("Job for %s timed out.", strna(d.name));
1591                         else if (streq(d.result, "canceled"))
1592                                 log_error("Job for %s canceled.", strna(d.name));
1593                         else if (streq(d.result, "dependency"))
1594                                 log_error("A dependency job for %s failed. See 'journalctl -xn' for details.", strna(d.name));
1595                         else if (!streq(d.result, "done") && !streq(d.result, "skipped"))
1596                                 log_error("Job for %s failed. See 'systemctl status %s' and 'journalctl -xn' for details.", strna(d.name), strna(d.name));
1597                 }
1598
1599                 if (streq_ptr(d.result, "timeout"))
1600                         r = -ETIME;
1601                 else if (streq_ptr(d.result, "canceled"))
1602                         r = -ECANCELED;
1603                 else if (!streq_ptr(d.result, "done") && !streq_ptr(d.result, "skipped"))
1604                         r = -EIO;
1605
1606                 free(d.result);
1607                 d.result = NULL;
1608
1609         free_name:
1610                 free(d.name);
1611                 d.name = NULL;
1612         }
1613
1614         dbus_connection_remove_filter(bus, wait_filter, &d);
1615         return r;
1616 }
1617
1618 static int check_one_unit(DBusConnection *bus, const char *name, char **check_states, bool quiet) {
1619         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1620         _cleanup_free_ char *n = NULL;
1621         DBusMessageIter iter, sub;
1622         const char
1623                 *interface = "org.freedesktop.systemd1.Unit",
1624                 *property = "ActiveState";
1625         const char *state, *path;
1626         DBusError error;
1627         int r;
1628
1629         assert(name);
1630
1631         dbus_error_init(&error);
1632
1633         n = unit_name_mangle(name);
1634         if (!n)
1635                 return log_oom();
1636
1637         r = bus_method_call_with_reply (
1638                         bus,
1639                         "org.freedesktop.systemd1",
1640                         "/org/freedesktop/systemd1",
1641                         "org.freedesktop.systemd1.Manager",
1642                         "GetUnit",
1643                         &reply,
1644                         &error,
1645                         DBUS_TYPE_STRING, &n,
1646                         DBUS_TYPE_INVALID);
1647         if (r < 0) {
1648                 dbus_error_free(&error);
1649
1650                 if (!quiet)
1651                         puts("unknown");
1652                 return 0;
1653         }
1654
1655         if (!dbus_message_get_args(reply, NULL,
1656                                    DBUS_TYPE_OBJECT_PATH, &path,
1657                                    DBUS_TYPE_INVALID)) {
1658                 log_error("Failed to parse reply.");
1659                 return -EIO;
1660         }
1661
1662         dbus_message_unref(reply);
1663         reply = NULL;
1664
1665         r = bus_method_call_with_reply(
1666                         bus,
1667                         "org.freedesktop.systemd1",
1668                         path,
1669                         "org.freedesktop.DBus.Properties",
1670                         "Get",
1671                         &reply,
1672                         NULL,
1673                         DBUS_TYPE_STRING, &interface,
1674                         DBUS_TYPE_STRING, &property,
1675                         DBUS_TYPE_INVALID);
1676         if (r < 0) {
1677                 if (!quiet)
1678                         puts("unknown");
1679                 return 0;
1680         }
1681
1682         if (!dbus_message_iter_init(reply, &iter) ||
1683             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1684                 log_error("Failed to parse reply.");
1685                 return r;
1686         }
1687
1688         dbus_message_iter_recurse(&iter, &sub);
1689
1690         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1691                 log_error("Failed to parse reply.");
1692                 return r;
1693         }
1694
1695         dbus_message_iter_get_basic(&sub, &state);
1696
1697         if (!quiet)
1698                 puts(state);
1699
1700         return strv_find(check_states, state) ? 1 : 0;
1701 }
1702
1703 static void check_triggering_units(
1704                 DBusConnection *bus,
1705                 const char *unit_name) {
1706
1707         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1708         DBusMessageIter iter, sub;
1709         const char *interface = "org.freedesktop.systemd1.Unit",
1710                    *load_state_property = "LoadState",
1711                    *triggered_by_property = "TriggeredBy",
1712                    *state;
1713         _cleanup_free_ char *unit_path = NULL, *n = NULL;
1714         bool print_warning_label = true;
1715         int r;
1716
1717         n = unit_name_mangle(unit_name);
1718         if (!n) {
1719                 log_oom();
1720                 return;
1721         }
1722
1723         unit_path = unit_dbus_path_from_name(n);
1724         if (!unit_path) {
1725                 log_oom();
1726                 return;
1727         }
1728
1729         r = bus_method_call_with_reply(
1730                         bus,
1731                         "org.freedesktop.systemd1",
1732                         unit_path,
1733                         "org.freedesktop.DBus.Properties",
1734                         "Get",
1735                         &reply,
1736                         NULL,
1737                         DBUS_TYPE_STRING, &interface,
1738                         DBUS_TYPE_STRING, &load_state_property,
1739                         DBUS_TYPE_INVALID);
1740         if (r < 0)
1741                 return;
1742
1743         if (!dbus_message_iter_init(reply, &iter) ||
1744             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
1745                 log_error("Failed to parse reply.");
1746                 return;
1747         }
1748
1749         dbus_message_iter_recurse(&iter, &sub);
1750
1751         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1752             log_error("Failed to parse reply.");
1753             return;
1754         }
1755
1756         dbus_message_iter_get_basic(&sub, &state);
1757
1758         if (streq(state, "masked"))
1759             return;
1760
1761         dbus_message_unref(reply);
1762         reply = NULL;
1763
1764         r = bus_method_call_with_reply(
1765                         bus,
1766                         "org.freedesktop.systemd1",
1767                         unit_path,
1768                         "org.freedesktop.DBus.Properties",
1769                         "Get",
1770                         &reply,
1771                         NULL,
1772                         DBUS_TYPE_STRING, &interface,
1773                         DBUS_TYPE_STRING, &triggered_by_property,
1774                         DBUS_TYPE_INVALID);
1775         if (r < 0)
1776                 return;
1777
1778         if (!dbus_message_iter_init(reply, &iter) ||
1779             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
1780                 log_error("Failed to parse reply.");
1781                 return;
1782         }
1783
1784         dbus_message_iter_recurse(&iter, &sub);
1785         dbus_message_iter_recurse(&sub, &iter);
1786         sub = iter;
1787
1788         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
1789                 const char * const check_states[] = {
1790                         "active",
1791                         "reloading",
1792                         NULL
1793                 };
1794                 const char *service_trigger;
1795
1796                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
1797                         log_error("Failed to parse reply.");
1798                         return;
1799                 }
1800
1801                 dbus_message_iter_get_basic(&sub, &service_trigger);
1802
1803                 r = check_one_unit(bus, service_trigger, (char**) check_states, true);
1804                 if (r < 0)
1805                         return;
1806                 if (r > 0) {
1807                         if (print_warning_label) {
1808                                 log_warning("Warning: Stopping %s, but it can still be activated by:", unit_name);
1809                                 print_warning_label = false;
1810                         }
1811
1812                         log_warning("  %s", service_trigger);
1813                 }
1814
1815                 dbus_message_iter_next(&sub);
1816         }
1817 }
1818
1819 static int start_unit_one(
1820                 DBusConnection *bus,
1821                 const char *method,
1822                 const char *name,
1823                 const char *mode,
1824                 DBusError *error,
1825                 Set *s) {
1826
1827         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
1828         _cleanup_free_ char *n;
1829         const char *path;
1830         int r;
1831
1832         assert(method);
1833         assert(name);
1834         assert(mode);
1835         assert(error);
1836
1837         n = unit_name_mangle(name);
1838         if (!n)
1839                 return log_oom();
1840
1841         r = bus_method_call_with_reply(
1842                         bus,
1843                         "org.freedesktop.systemd1",
1844                         "/org/freedesktop/systemd1",
1845                         "org.freedesktop.systemd1.Manager",
1846                         method,
1847                         &reply,
1848                         error,
1849                         DBUS_TYPE_STRING, &n,
1850                         DBUS_TYPE_STRING, &mode,
1851                         DBUS_TYPE_INVALID);
1852         if (r) {
1853                 if (r == -ENOENT && arg_action != ACTION_SYSTEMCTL)
1854                         /* There's always a fallback possible for
1855                          * legacy actions. */
1856                         r = -EADDRNOTAVAIL;
1857                 else
1858                         log_error("Failed to issue method call: %s", bus_error_message(error));
1859
1860                 return r;
1861         }
1862
1863         if (!dbus_message_get_args(reply, error,
1864                                    DBUS_TYPE_OBJECT_PATH, &path,
1865                                    DBUS_TYPE_INVALID)) {
1866                 log_error("Failed to parse reply: %s", bus_error_message(error));
1867                 return -EIO;
1868         }
1869
1870         if (need_daemon_reload(bus, n) > 0)
1871                 log_warning("Warning: Unit file of %s changed on disk, 'systemctl %sdaemon-reload' recommended.",
1872                             n, arg_scope == UNIT_FILE_SYSTEM ? "" : "--user ");
1873
1874         if (s) {
1875                 char *p;
1876
1877                 p = strdup(path);
1878                 if (!p)
1879                         return log_oom();
1880
1881                 r = set_consume(s, p);
1882                 if (r < 0) {
1883                         log_error("Failed to add path to set.");
1884                         return r;
1885                 }
1886         }
1887
1888         return 0;
1889 }
1890
1891 static const struct {
1892         const char *target;
1893         const char *verb;
1894         const char *mode;
1895 } action_table[_ACTION_MAX] = {
1896         [ACTION_HALT]         = { SPECIAL_HALT_TARGET,         "halt",         "replace-irreversibly" },
1897         [ACTION_POWEROFF]     = { SPECIAL_POWEROFF_TARGET,     "poweroff",     "replace-irreversibly" },
1898         [ACTION_REBOOT]       = { SPECIAL_REBOOT_TARGET,       "reboot",       "replace-irreversibly" },
1899         [ACTION_KEXEC]        = { SPECIAL_KEXEC_TARGET,        "kexec",        "replace-irreversibly" },
1900         [ACTION_RUNLEVEL2]    = { SPECIAL_RUNLEVEL2_TARGET,    NULL,           "isolate" },
1901         [ACTION_RUNLEVEL3]    = { SPECIAL_RUNLEVEL3_TARGET,    NULL,           "isolate" },
1902         [ACTION_RUNLEVEL4]    = { SPECIAL_RUNLEVEL4_TARGET,    NULL,           "isolate" },
1903         [ACTION_RUNLEVEL5]    = { SPECIAL_RUNLEVEL5_TARGET,    NULL,           "isolate" },
1904         [ACTION_RESCUE]       = { SPECIAL_RESCUE_TARGET,       "rescue",       "isolate" },
1905         [ACTION_EMERGENCY]    = { SPECIAL_EMERGENCY_TARGET,    "emergency",    "isolate" },
1906         [ACTION_DEFAULT]      = { SPECIAL_DEFAULT_TARGET,      "default",      "isolate" },
1907         [ACTION_EXIT]         = { SPECIAL_EXIT_TARGET,         "exit",         "replace-irreversibly" },
1908         [ACTION_SUSPEND]      = { SPECIAL_SUSPEND_TARGET,      "suspend",      "replace-irreversibly" },
1909         [ACTION_HIBERNATE]    = { SPECIAL_HIBERNATE_TARGET,    "hibernate",    "replace-irreversibly" },
1910         [ACTION_HYBRID_SLEEP] = { SPECIAL_HYBRID_SLEEP_TARGET, "hybrid-sleep", "replace-irreversibly" },
1911 };
1912
1913 static enum action verb_to_action(const char *verb) {
1914         enum action i;
1915
1916         for (i = ACTION_INVALID; i < _ACTION_MAX; i++)
1917                 if (action_table[i].verb && streq(verb, action_table[i].verb))
1918                         return i;
1919         return ACTION_INVALID;
1920 }
1921
1922 static int start_unit(DBusConnection *bus, char **args) {
1923
1924         int r, ret = 0;
1925         const char *method, *mode, *one_name;
1926         _cleanup_set_free_free_ Set *s = NULL;
1927         _cleanup_dbus_error_free_ DBusError error;
1928         char **name;
1929
1930         dbus_error_init(&error);
1931
1932         assert(bus);
1933
1934         ask_password_agent_open_if_enabled();
1935
1936         if (arg_action == ACTION_SYSTEMCTL) {
1937                 enum action action;
1938                 method =
1939                         streq(args[0], "stop") ||
1940                         streq(args[0], "condstop")              ? "StopUnit" :
1941                         streq(args[0], "reload")                ? "ReloadUnit" :
1942                         streq(args[0], "restart")               ? "RestartUnit" :
1943
1944                         streq(args[0], "try-restart")           ||
1945                         streq(args[0], "condrestart")           ? "TryRestartUnit" :
1946
1947                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1948
1949                         streq(args[0], "reload-or-try-restart") ||
1950                         streq(args[0], "condreload") ||
1951
1952                         streq(args[0], "force-reload")          ? "ReloadOrTryRestartUnit" :
1953                                                                   "StartUnit";
1954                 action = verb_to_action(args[0]);
1955
1956                 mode = streq(args[0], "isolate") ? "isolate" :
1957                        action_table[action].mode ?: arg_job_mode;
1958
1959                 one_name = action_table[action].target;
1960
1961         } else {
1962                 assert(arg_action < ELEMENTSOF(action_table));
1963                 assert(action_table[arg_action].target);
1964
1965                 method = "StartUnit";
1966
1967                 mode = action_table[arg_action].mode;
1968                 one_name = action_table[arg_action].target;
1969         }
1970
1971         if (!arg_no_block) {
1972                 ret = enable_wait_for_jobs(bus);
1973                 if (ret < 0) {
1974                         log_error("Could not watch jobs: %s", strerror(-ret));
1975                         return ret;
1976                 }
1977
1978                 s = set_new(string_hash_func, string_compare_func);
1979                 if (!s)
1980                         return log_oom();
1981         }
1982
1983         if (one_name) {
1984                 ret = start_unit_one(bus, method, one_name, mode, &error, s);
1985                 if (ret < 0)
1986                         ret = translate_bus_error_to_exit_status(ret, &error);
1987         } else {
1988                 STRV_FOREACH(name, args+1) {
1989                         r = start_unit_one(bus, method, *name, mode, &error, s);
1990                         if (r < 0) {
1991                                 ret = translate_bus_error_to_exit_status(r, &error);
1992                                 dbus_error_free(&error);
1993                         }
1994                 }
1995         }
1996
1997         if (!arg_no_block) {
1998                 r = wait_for_jobs(bus, s);
1999                 if (r < 0)
2000                         return r;
2001
2002                 /* When stopping units, warn if they can still be triggered by
2003                  * another active unit (socket, path, timer) */
2004                 if (!arg_quiet && streq(method, "StopUnit")) {
2005                         if (one_name)
2006                                 check_triggering_units(bus, one_name);
2007                         else
2008                                 STRV_FOREACH(name, args+1)
2009                                         check_triggering_units(bus, *name);
2010                 }
2011         }
2012
2013         return ret;
2014 }
2015
2016 /* Ask systemd-logind, which might grant access to unprivileged users
2017  * through PolicyKit */
2018 static int reboot_with_logind(DBusConnection *bus, enum action a) {
2019 #ifdef HAVE_LOGIND
2020         const char *method;
2021         dbus_bool_t interactive = true;
2022
2023         if (!bus)
2024                 return -EIO;
2025
2026         polkit_agent_open_if_enabled();
2027
2028         switch (a) {
2029
2030         case ACTION_REBOOT:
2031                 method = "Reboot";
2032                 break;
2033
2034         case ACTION_POWEROFF:
2035                 method = "PowerOff";
2036                 break;
2037
2038         case ACTION_SUSPEND:
2039                 method = "Suspend";
2040                 break;
2041
2042         case ACTION_HIBERNATE:
2043                 method = "Hibernate";
2044                 break;
2045
2046         case ACTION_HYBRID_SLEEP:
2047                 method = "HybridSleep";
2048                 break;
2049
2050         default:
2051                 return -EINVAL;
2052         }
2053
2054         return bus_method_call_with_reply(
2055                         bus,
2056                         "org.freedesktop.login1",
2057                         "/org/freedesktop/login1",
2058                         "org.freedesktop.login1.Manager",
2059                         method,
2060                         NULL,
2061                         NULL,
2062                         DBUS_TYPE_BOOLEAN, &interactive,
2063                         DBUS_TYPE_INVALID);
2064 #else
2065         return -ENOSYS;
2066 #endif
2067 }
2068
2069 static int check_inhibitors(DBusConnection *bus, enum action a) {
2070 #ifdef HAVE_LOGIND
2071         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
2072         DBusMessageIter iter, sub, sub2;
2073         int r;
2074         unsigned c = 0;
2075         _cleanup_strv_free_ char **sessions = NULL;
2076         char **s;
2077
2078         if (!bus)
2079                 return 0;
2080
2081         if (arg_ignore_inhibitors || arg_force > 0)
2082                 return 0;
2083
2084         if (arg_when > 0)
2085                 return 0;
2086
2087         if (geteuid() == 0)
2088                 return 0;
2089
2090         if (!on_tty())
2091                 return 0;
2092
2093         r = bus_method_call_with_reply(
2094                         bus,
2095                         "org.freedesktop.login1",
2096                         "/org/freedesktop/login1",
2097                         "org.freedesktop.login1.Manager",
2098                         "ListInhibitors",
2099                         &reply,
2100                         NULL,
2101                         DBUS_TYPE_INVALID);
2102         if (r < 0)
2103                 /* If logind is not around, then there are no inhibitors... */
2104                 return 0;
2105
2106         if (!dbus_message_iter_init(reply, &iter) ||
2107             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2108             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT) {
2109                 log_error("Failed to parse reply.");
2110                 return -EIO;
2111         }
2112
2113         dbus_message_iter_recurse(&iter, &sub);
2114         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2115                 const char *what, *who, *why, *mode;
2116                 uint32_t uid, pid;
2117                 _cleanup_strv_free_ char **sv = NULL;
2118                 _cleanup_free_ char *comm = NULL, *user = NULL;
2119
2120                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
2121                         log_error("Failed to parse reply.");
2122                         return -EIO;
2123                 }
2124
2125                 dbus_message_iter_recurse(&sub, &sub2);
2126
2127                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &what, true) < 0 ||
2128                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &who, true) < 0 ||
2129                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &why, true) < 0 ||
2130                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &mode, true) < 0 ||
2131                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &uid, true) < 0 ||
2132                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, false) < 0) {
2133                         log_error("Failed to parse reply.");
2134                         return -EIO;
2135                 }
2136
2137                 if (!streq(mode, "block"))
2138                         goto next;
2139
2140                 sv = strv_split(what, ":");
2141                 if (!sv)
2142                         return log_oom();
2143
2144                 if (!strv_contains(sv,
2145                                   a == ACTION_HALT ||
2146                                   a == ACTION_POWEROFF ||
2147                                   a == ACTION_REBOOT ||
2148                                   a == ACTION_KEXEC ? "shutdown" : "sleep"))
2149                         goto next;
2150
2151                 get_process_comm(pid, &comm);
2152                 user = uid_to_name(uid);
2153                 log_warning("Operation inhibited by \"%s\" (PID %lu \"%s\", user %s), reason is \"%s\".",
2154                             who, (unsigned long) pid, strna(comm), strna(user), why);
2155                 c++;
2156
2157         next:
2158                 dbus_message_iter_next(&sub);
2159         }
2160
2161         dbus_message_iter_recurse(&iter, &sub);
2162
2163         /* Check for current sessions */
2164         sd_get_sessions(&sessions);
2165         STRV_FOREACH(s, sessions) {
2166                 uid_t uid;
2167                 _cleanup_free_ char *type = NULL, *tty = NULL, *seat = NULL, *user = NULL, *service = NULL, *class = NULL;
2168
2169                 if (sd_session_get_uid(*s, &uid) < 0 || uid == getuid())
2170                         continue;
2171
2172                 if (sd_session_get_class(*s, &class) < 0 || !streq(class, "user"))
2173                         continue;
2174
2175                 if (sd_session_get_type(*s, &type) < 0 || (!streq(type, "x11") && !streq(type, "tty")))
2176                         continue;
2177
2178                 sd_session_get_tty(*s, &tty);
2179                 sd_session_get_seat(*s, &seat);
2180                 sd_session_get_service(*s, &service);
2181                 user = uid_to_name(uid);
2182
2183                 log_warning("User %s is logged in on %s.", strna(user), isempty(tty) ? (isempty(seat) ? strna(service) : seat) : tty);
2184                 c++;
2185         }
2186
2187         if (c <= 0)
2188                 return 0;
2189
2190         log_error("Please retry operation after closing inhibitors and logging out other users.\nAlternatively, ignore inhibitors and users with 'systemctl %s -i'.",
2191                   action_table[a].verb);
2192
2193         return -EPERM;
2194 #else
2195         return 0;
2196 #endif
2197 }
2198
2199 static int start_special(DBusConnection *bus, char **args) {
2200         enum action a;
2201         int r;
2202
2203         assert(args);
2204
2205         a = verb_to_action(args[0]);
2206
2207         r = check_inhibitors(bus, a);
2208         if (r < 0)
2209                 return r;
2210
2211         if (arg_force >= 2 && geteuid() != 0) {
2212                 log_error("Must be root.");
2213                 return -EPERM;
2214         }
2215
2216         if (arg_force >= 2 &&
2217             (a == ACTION_HALT ||
2218              a == ACTION_POWEROFF ||
2219              a == ACTION_REBOOT))
2220                 halt_now(a);
2221
2222         if (arg_force >= 1 &&
2223             (a == ACTION_HALT ||
2224              a == ACTION_POWEROFF ||
2225              a == ACTION_REBOOT ||
2226              a == ACTION_KEXEC ||
2227              a == ACTION_EXIT))
2228                 return daemon_reload(bus, args);
2229
2230         /* first try logind, to allow authentication with polkit */
2231         if (geteuid() != 0 &&
2232             (a == ACTION_POWEROFF ||
2233              a == ACTION_REBOOT ||
2234              a == ACTION_SUSPEND ||
2235              a == ACTION_HIBERNATE ||
2236              a == ACTION_HYBRID_SLEEP)) {
2237                 r = reboot_with_logind(bus, a);
2238                 if (r >= 0)
2239                         return r;
2240         }
2241
2242         r = start_unit(bus, args);
2243         if (r == EXIT_SUCCESS)
2244                 warn_wall(a);
2245
2246         return r;
2247 }
2248
2249 static int check_unit_active(DBusConnection *bus, char **args) {
2250         const char * const check_states[] = {
2251                 "active",
2252                 "reloading",
2253                 NULL
2254         };
2255
2256         char **name;
2257         int r = 3; /* According to LSB: "program is not running" */
2258
2259         assert(bus);
2260         assert(args);
2261
2262         STRV_FOREACH(name, args+1) {
2263                 int state;
2264
2265                 state = check_one_unit(bus, *name, (char**) check_states, arg_quiet);
2266                 if (state < 0)
2267                         return state;
2268                 if (state > 0)
2269                         r = 0;
2270         }
2271
2272         return r;
2273 }
2274
2275 static int check_unit_failed(DBusConnection *bus, char **args) {
2276         const char * const check_states[] = {
2277                 "failed",
2278                 NULL
2279         };
2280
2281         char **name;
2282         int r = 1;
2283
2284         assert(bus);
2285         assert(args);
2286
2287         STRV_FOREACH(name, args+1) {
2288                 int state;
2289
2290                 state = check_one_unit(bus, *name, (char**) check_states, arg_quiet);
2291                 if (state < 0)
2292                         return state;
2293                 if (state > 0)
2294                         r = 0;
2295         }
2296
2297         return r;
2298 }
2299
2300 static int kill_unit(DBusConnection *bus, char **args) {
2301         char **name;
2302         int r = 0;
2303
2304         assert(bus);
2305         assert(args);
2306
2307         if (!arg_kill_who)
2308                 arg_kill_who = "all";
2309
2310         STRV_FOREACH(name, args+1) {
2311                 _cleanup_free_ char *n = NULL;
2312
2313                 n = unit_name_mangle(*name);
2314                 if (!n)
2315                         return log_oom();
2316
2317                 r = bus_method_call_with_reply(
2318                                 bus,
2319                                 "org.freedesktop.systemd1",
2320                                 "/org/freedesktop/systemd1",
2321                                 "org.freedesktop.systemd1.Manager",
2322                                 "KillUnit",
2323                                 NULL,
2324                                 NULL,
2325                                 DBUS_TYPE_STRING, &n,
2326                                 DBUS_TYPE_STRING, &arg_kill_who,
2327                                 DBUS_TYPE_INT32, &arg_signal,
2328                                 DBUS_TYPE_INVALID);
2329                 if (r < 0)
2330                         return r;
2331         }
2332         return 0;
2333 }
2334
2335 typedef struct ExecStatusInfo {
2336         char *name;
2337
2338         char *path;
2339         char **argv;
2340
2341         bool ignore;
2342
2343         usec_t start_timestamp;
2344         usec_t exit_timestamp;
2345         pid_t pid;
2346         int code;
2347         int status;
2348
2349         LIST_FIELDS(struct ExecStatusInfo, exec);
2350 } ExecStatusInfo;
2351
2352 static void exec_status_info_free(ExecStatusInfo *i) {
2353         assert(i);
2354
2355         free(i->name);
2356         free(i->path);
2357         strv_free(i->argv);
2358         free(i);
2359 }
2360
2361 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
2362         uint64_t start_timestamp, exit_timestamp, start_timestamp_monotonic, exit_timestamp_monotonic;
2363         DBusMessageIter sub2, sub3;
2364         const char*path;
2365         unsigned n;
2366         uint32_t pid;
2367         int32_t code, status;
2368         dbus_bool_t ignore;
2369
2370         assert(i);
2371         assert(i);
2372
2373         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
2374                 return -EIO;
2375
2376         dbus_message_iter_recurse(sub, &sub2);
2377
2378         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
2379                 return -EIO;
2380
2381         i->path = strdup(path);
2382         if (!i->path)
2383                 return -ENOMEM;
2384
2385         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
2386             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
2387                 return -EIO;
2388
2389         n = 0;
2390         dbus_message_iter_recurse(&sub2, &sub3);
2391         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
2392                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
2393                 dbus_message_iter_next(&sub3);
2394                 n++;
2395         }
2396
2397         i->argv = new0(char*, n+1);
2398         if (!i->argv)
2399                 return -ENOMEM;
2400
2401         n = 0;
2402         dbus_message_iter_recurse(&sub2, &sub3);
2403         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
2404                 const char *s;
2405
2406                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
2407                 dbus_message_iter_get_basic(&sub3, &s);
2408                 dbus_message_iter_next(&sub3);
2409
2410                 i->argv[n] = strdup(s);
2411                 if (!i->argv[n])
2412                         return -ENOMEM;
2413
2414                 n++;
2415         }
2416
2417         if (!dbus_message_iter_next(&sub2) ||
2418             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
2419             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
2420             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp_monotonic, true) < 0 ||
2421             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
2422             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp_monotonic, true) < 0 ||
2423             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
2424             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
2425             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
2426                 return -EIO;
2427
2428         i->ignore = ignore;
2429         i->start_timestamp = (usec_t) start_timestamp;
2430         i->exit_timestamp = (usec_t) exit_timestamp;
2431         i->pid = (pid_t) pid;
2432         i->code = code;
2433         i->status = status;
2434
2435         return 0;
2436 }
2437
2438 typedef struct UnitStatusInfo {
2439         const char *id;
2440         const char *load_state;
2441         const char *active_state;
2442         const char *sub_state;
2443         const char *unit_file_state;
2444
2445         const char *description;
2446         const char *following;
2447
2448         char **documentation;
2449
2450         const char *fragment_path;
2451         const char *source_path;
2452         const char *control_group;
2453
2454         char **dropin_paths;
2455
2456         const char *load_error;
2457         const char *result;
2458
2459         usec_t inactive_exit_timestamp;
2460         usec_t inactive_exit_timestamp_monotonic;
2461         usec_t active_enter_timestamp;
2462         usec_t active_exit_timestamp;
2463         usec_t inactive_enter_timestamp;
2464
2465         bool need_daemon_reload;
2466
2467         /* Service */
2468         pid_t main_pid;
2469         pid_t control_pid;
2470         const char *status_text;
2471         const char *pid_file;
2472         bool running:1;
2473
2474         usec_t start_timestamp;
2475         usec_t exit_timestamp;
2476
2477         int exit_code, exit_status;
2478
2479         usec_t condition_timestamp;
2480         bool condition_result;
2481         bool failed_condition_trigger;
2482         bool failed_condition_negate;
2483         const char *failed_condition;
2484         const char *failed_condition_param;
2485
2486         /* Socket */
2487         unsigned n_accepted;
2488         unsigned n_connections;
2489         bool accept;
2490
2491         /* Pairs of type, path */
2492         char **listen;
2493
2494         /* Device */
2495         const char *sysfs_path;
2496
2497         /* Mount, Automount */
2498         const char *where;
2499
2500         /* Swap */
2501         const char *what;
2502
2503         LIST_HEAD(ExecStatusInfo, exec);
2504 } UnitStatusInfo;
2505
2506 static void print_status_info(UnitStatusInfo *i,
2507                               bool *ellipsized) {
2508         ExecStatusInfo *p;
2509         const char *on, *off, *ss;
2510         usec_t timestamp;
2511         char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
2512         char since2[FORMAT_TIMESTAMP_MAX], *s2;
2513         const char *path;
2514         int flags =
2515                 arg_all * OUTPUT_SHOW_ALL |
2516                 (!on_tty() || pager_have()) * OUTPUT_FULL_WIDTH |
2517                 on_tty() * OUTPUT_COLOR |
2518                 !arg_quiet * OUTPUT_WARN_CUTOFF |
2519                 arg_full * OUTPUT_FULL_WIDTH;
2520         char **t, **t2;
2521
2522         assert(i);
2523
2524         /* This shows pretty information about a unit. See
2525          * print_property() for a low-level property printer */
2526
2527         printf("%s", strna(i->id));
2528
2529         if (i->description && !streq_ptr(i->id, i->description))
2530                 printf(" - %s", i->description);
2531
2532         printf("\n");
2533
2534         if (i->following)
2535                 printf("   Follow: unit currently follows state of %s\n", i->following);
2536
2537         if (streq_ptr(i->load_state, "error")) {
2538                 on = ansi_highlight_red();
2539                 off = ansi_highlight_off();
2540         } else
2541                 on = off = "";
2542
2543         path = i->source_path ? i->source_path : i->fragment_path;
2544
2545         if (i->load_error)
2546                 printf("   Loaded: %s%s%s (Reason: %s)\n",
2547                        on, strna(i->load_state), off, i->load_error);
2548         else if (path && i->unit_file_state)
2549                 printf("   Loaded: %s%s%s (%s; %s)\n",
2550                        on, strna(i->load_state), off, path, i->unit_file_state);
2551         else if (path)
2552                 printf("   Loaded: %s%s%s (%s)\n",
2553                        on, strna(i->load_state), off, path);
2554         else
2555                 printf("   Loaded: %s%s%s\n",
2556                        on, strna(i->load_state), off);
2557
2558         if (!strv_isempty(i->dropin_paths)) {
2559                 char ** dropin;
2560                 char * dir = NULL;
2561                 bool last = false;
2562
2563                 STRV_FOREACH(dropin, i->dropin_paths) {
2564                         if (! dir || last) {
2565                                 printf(dir ? "        " : "  Drop-In: ");
2566
2567                                 free(dir);
2568
2569                                 if (path_get_parent(*dropin, &dir) < 0) {
2570                                         log_oom();
2571                                         return;
2572                                 }
2573
2574                                 printf("%s\n           %s", dir,
2575                                        draw_special_char(DRAW_TREE_RIGHT));
2576                         }
2577
2578                         last = ! (*(dropin + 1) && startswith(*(dropin + 1), dir));
2579
2580                         printf("%s%s", path_get_file_name(*dropin), last ? "\n" : ", ");
2581                 }
2582
2583                 free(dir);
2584         }
2585
2586         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
2587
2588         if (streq_ptr(i->active_state, "failed")) {
2589                 on = ansi_highlight_red();
2590                 off = ansi_highlight_off();
2591         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
2592                 on = ansi_highlight_green();
2593                 off = ansi_highlight_off();
2594         } else
2595                 on = off = "";
2596
2597         if (ss)
2598                 printf("   Active: %s%s (%s)%s",
2599                        on, strna(i->active_state), ss, off);
2600         else
2601                 printf("   Active: %s%s%s",
2602                        on, strna(i->active_state), off);
2603
2604         if (!isempty(i->result) && !streq(i->result, "success"))
2605                 printf(" (Result: %s)", i->result);
2606
2607         timestamp = (streq_ptr(i->active_state, "active")      ||
2608                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
2609                     (streq_ptr(i->active_state, "inactive")    ||
2610                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
2611                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
2612                                                                   i->active_exit_timestamp;
2613
2614         s1 = format_timestamp_relative(since1, sizeof(since1), timestamp);
2615         s2 = format_timestamp(since2, sizeof(since2), timestamp);
2616
2617         if (s1)
2618                 printf(" since %s; %s\n", s2, s1);
2619         else if (s2)
2620                 printf(" since %s\n", s2);
2621         else
2622                 printf("\n");
2623
2624         if (!i->condition_result && i->condition_timestamp > 0) {
2625                 s1 = format_timestamp_relative(since1, sizeof(since1), i->condition_timestamp);
2626                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
2627
2628                 printf("           start condition failed at %s%s%s\n",
2629                        s2, s1 ? "; " : "", s1 ? s1 : "");
2630                 if (i->failed_condition_trigger)
2631                         printf("           none of the trigger conditions were met\n");
2632                 else if (i->failed_condition)
2633                         printf("           %s=%s%s was not met\n",
2634                                i->failed_condition,
2635                                i->failed_condition_negate ? "!" : "",
2636                                i->failed_condition_param);
2637         }
2638
2639         if (i->sysfs_path)
2640                 printf("   Device: %s\n", i->sysfs_path);
2641         if (i->where)
2642                 printf("    Where: %s\n", i->where);
2643         if (i->what)
2644                 printf("     What: %s\n", i->what);
2645
2646         STRV_FOREACH(t, i->documentation)
2647                 printf(" %*s %s\n", 9, t == i->documentation ? "Docs:" : "", *t);
2648
2649         STRV_FOREACH_PAIR(t, t2, i->listen)
2650                 printf(" %*s %s (%s)\n", 9, t == i->listen ? "Listen:" : "", *t2, *t);
2651
2652         if (i->accept)
2653                 printf(" Accepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
2654
2655         LIST_FOREACH(exec, p, i->exec) {
2656                 _cleanup_free_ char *argv = NULL;
2657                 bool good;
2658
2659                 /* Only show exited processes here */
2660                 if (p->code == 0)
2661                         continue;
2662
2663                 argv = strv_join(p->argv, " ");
2664                 printf("  Process: %u %s=%s ", p->pid, p->name, strna(argv));
2665
2666                 good = is_clean_exit_lsb(p->code, p->status, NULL);
2667                 if (!good) {
2668                         on = ansi_highlight_red();
2669                         off = ansi_highlight_off();
2670                 } else
2671                         on = off = "";
2672
2673                 printf("%s(code=%s, ", on, sigchld_code_to_string(p->code));
2674
2675                 if (p->code == CLD_EXITED) {
2676                         const char *c;
2677
2678                         printf("status=%i", p->status);
2679
2680                         c = exit_status_to_string(p->status, EXIT_STATUS_SYSTEMD);
2681                         if (c)
2682                                 printf("/%s", c);
2683
2684                 } else
2685                         printf("signal=%s", signal_to_string(p->status));
2686
2687                 printf(")%s\n", off);
2688
2689                 if (i->main_pid == p->pid &&
2690                     i->start_timestamp == p->start_timestamp &&
2691                     i->exit_timestamp == p->start_timestamp)
2692                         /* Let's not show this twice */
2693                         i->main_pid = 0;
2694
2695                 if (p->pid == i->control_pid)
2696                         i->control_pid = 0;
2697         }
2698
2699         if (i->main_pid > 0 || i->control_pid > 0) {
2700                 if (i->main_pid > 0) {
2701                         printf(" Main PID: %u", (unsigned) i->main_pid);
2702
2703                         if (i->running) {
2704                                 _cleanup_free_ char *comm = NULL;
2705                                 get_process_comm(i->main_pid, &comm);
2706                                 if (comm)
2707                                         printf(" (%s)", comm);
2708                         } else if (i->exit_code > 0) {
2709                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
2710
2711                                 if (i->exit_code == CLD_EXITED) {
2712                                         const char *c;
2713
2714                                         printf("status=%i", i->exit_status);
2715
2716                                         c = exit_status_to_string(i->exit_status, EXIT_STATUS_SYSTEMD);
2717                                         if (c)
2718                                                 printf("/%s", c);
2719
2720                                 } else
2721                                         printf("signal=%s", signal_to_string(i->exit_status));
2722                                 printf(")");
2723                         }
2724
2725                         if (i->control_pid > 0)
2726                                 printf(";");
2727                 }
2728
2729                 if (i->control_pid > 0) {
2730                         _cleanup_free_ char *c = NULL;
2731
2732                         printf(" %8s: %u", i->main_pid ? "" : " Control", (unsigned) i->control_pid);
2733
2734                         get_process_comm(i->control_pid, &c);
2735                         if (c)
2736                                 printf(" (%s)", c);
2737                 }
2738
2739                 printf("\n");
2740         }
2741
2742         if (i->status_text)
2743                 printf("   Status: \"%s\"\n", i->status_text);
2744
2745         if (i->control_group &&
2746             (i->main_pid > 0 || i->control_pid > 0 || cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, i->control_group, false) == 0)) {
2747                 unsigned c;
2748
2749                 printf("   CGroup: %s\n", i->control_group);
2750
2751                 if (arg_transport != TRANSPORT_SSH) {
2752                         unsigned k = 0;
2753                         pid_t extra[2];
2754                         char prefix[] = "           ";
2755
2756                         c = columns();
2757                         if (c > sizeof(prefix) - 1)
2758                                 c -= sizeof(prefix) - 1;
2759                         else
2760                                 c = 0;
2761
2762                         if (i->main_pid > 0)
2763                                 extra[k++] = i->main_pid;
2764
2765                         if (i->control_pid > 0)
2766                                 extra[k++] = i->control_pid;
2767
2768                         show_cgroup_and_extra(SYSTEMD_CGROUP_CONTROLLER, i->control_group, prefix,
2769                                                       c, false, extra, k, flags);
2770                 }
2771         }
2772
2773         if (i->id && arg_transport != TRANSPORT_SSH) {
2774                 printf("\n");
2775                 show_journal_by_unit(stdout,
2776                                      i->id,
2777                                      arg_output,
2778                                      0,
2779                                      i->inactive_exit_timestamp_monotonic,
2780                                      arg_lines,
2781                                      getuid(),
2782                                      flags,
2783                                      arg_scope == UNIT_FILE_SYSTEM,
2784                                      ellipsized);
2785         }
2786
2787         if (i->need_daemon_reload)
2788                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %sdaemon-reload' recommended.\n",
2789                        ansi_highlight_red(),
2790                        ansi_highlight_off(),
2791                        arg_scope == UNIT_FILE_SYSTEM ? "" : "--user ");
2792 }
2793
2794 static void show_unit_help(UnitStatusInfo *i) {
2795         char **p;
2796
2797         assert(i);
2798
2799         if (!i->documentation) {
2800                 log_info("Documentation for %s not known.", i->id);
2801                 return;
2802         }
2803
2804         STRV_FOREACH(p, i->documentation) {
2805
2806                 if (startswith(*p, "man:")) {
2807                         size_t k;
2808                         char *e = NULL;
2809                         _cleanup_free_ char *page = NULL, *section = NULL;
2810                         const char *args[4] = { "man", NULL, NULL, NULL };
2811                         pid_t pid;
2812
2813                         k = strlen(*p);
2814
2815                         if ((*p)[k-1] == ')')
2816                                 e = strrchr(*p, '(');
2817
2818                         if (e) {
2819                                 page = strndup((*p) + 4, e - *p - 4);
2820                                 section = strndup(e + 1, *p + k - e - 2);
2821                                 if (!page || !section) {
2822                                         log_oom();
2823                                         return;
2824                                 }
2825
2826                                 args[1] = section;
2827                                 args[2] = page;
2828                         } else
2829                                 args[1] = *p + 4;
2830
2831                         pid = fork();
2832                         if (pid < 0) {
2833                                 log_error("Failed to fork: %m");
2834                                 continue;
2835                         }
2836
2837                         if (pid == 0) {
2838                                 /* Child */
2839                                 execvp(args[0], (char**) args);
2840                                 log_error("Failed to execute man: %m");
2841                                 _exit(EXIT_FAILURE);
2842                         }
2843
2844                         wait_for_terminate(pid, NULL);
2845                 } else
2846                         log_info("Can't show: %s", *p);
2847         }
2848 }
2849
2850 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
2851
2852         assert(name);
2853         assert(iter);
2854         assert(i);
2855
2856         switch (dbus_message_iter_get_arg_type(iter)) {
2857
2858         case DBUS_TYPE_STRING: {
2859                 const char *s;
2860
2861                 dbus_message_iter_get_basic(iter, &s);
2862
2863                 if (!isempty(s)) {
2864                         if (streq(name, "Id"))
2865                                 i->id = s;
2866                         else if (streq(name, "LoadState"))
2867                                 i->load_state = s;
2868                         else if (streq(name, "ActiveState"))
2869                                 i->active_state = s;
2870                         else if (streq(name, "SubState"))
2871                                 i->sub_state = s;
2872                         else if (streq(name, "Description"))
2873                                 i->description = s;
2874                         else if (streq(name, "FragmentPath"))
2875                                 i->fragment_path = s;
2876                         else if (streq(name, "SourcePath"))
2877                                 i->source_path = s;
2878 #ifndef NOLEGACY
2879                         else if (streq(name, "DefaultControlGroup")) {
2880                                 const char *e;
2881                                 e = startswith(s, SYSTEMD_CGROUP_CONTROLLER ":");
2882                                 if (e)
2883                                         i->control_group = e;
2884                         }
2885 #endif
2886                         else if (streq(name, "ControlGroup"))
2887                                 i->control_group = s;
2888                         else if (streq(name, "StatusText"))
2889                                 i->status_text = s;
2890                         else if (streq(name, "PIDFile"))
2891                                 i->pid_file = s;
2892                         else if (streq(name, "SysFSPath"))
2893                                 i->sysfs_path = s;
2894                         else if (streq(name, "Where"))
2895                                 i->where = s;
2896                         else if (streq(name, "What"))
2897                                 i->what = s;
2898                         else if (streq(name, "Following"))
2899                                 i->following = s;
2900                         else if (streq(name, "UnitFileState"))
2901                                 i->unit_file_state = s;
2902                         else if (streq(name, "Result"))
2903                                 i->result = s;
2904                 }
2905
2906                 break;
2907         }
2908
2909         case DBUS_TYPE_BOOLEAN: {
2910                 dbus_bool_t b;
2911
2912                 dbus_message_iter_get_basic(iter, &b);
2913
2914                 if (streq(name, "Accept"))
2915                         i->accept = b;
2916                 else if (streq(name, "NeedDaemonReload"))
2917                         i->need_daemon_reload = b;
2918                 else if (streq(name, "ConditionResult"))
2919                         i->condition_result = b;
2920
2921                 break;
2922         }
2923
2924         case DBUS_TYPE_UINT32: {
2925                 uint32_t u;
2926
2927                 dbus_message_iter_get_basic(iter, &u);
2928
2929                 if (streq(name, "MainPID")) {
2930                         if (u > 0) {
2931                                 i->main_pid = (pid_t) u;
2932                                 i->running = true;
2933                         }
2934                 } else if (streq(name, "ControlPID"))
2935                         i->control_pid = (pid_t) u;
2936                 else if (streq(name, "ExecMainPID")) {
2937                         if (u > 0)
2938                                 i->main_pid = (pid_t) u;
2939                 } else if (streq(name, "NAccepted"))
2940                         i->n_accepted = u;
2941                 else if (streq(name, "NConnections"))
2942                         i->n_connections = u;
2943
2944                 break;
2945         }
2946
2947         case DBUS_TYPE_INT32: {
2948                 int32_t j;
2949
2950                 dbus_message_iter_get_basic(iter, &j);
2951
2952                 if (streq(name, "ExecMainCode"))
2953                         i->exit_code = (int) j;
2954                 else if (streq(name, "ExecMainStatus"))
2955                         i->exit_status = (int) j;
2956
2957                 break;
2958         }
2959
2960         case DBUS_TYPE_UINT64: {
2961                 uint64_t u;
2962
2963                 dbus_message_iter_get_basic(iter, &u);
2964
2965                 if (streq(name, "ExecMainStartTimestamp"))
2966                         i->start_timestamp = (usec_t) u;
2967                 else if (streq(name, "ExecMainExitTimestamp"))
2968                         i->exit_timestamp = (usec_t) u;
2969                 else if (streq(name, "ActiveEnterTimestamp"))
2970                         i->active_enter_timestamp = (usec_t) u;
2971                 else if (streq(name, "InactiveEnterTimestamp"))
2972                         i->inactive_enter_timestamp = (usec_t) u;
2973                 else if (streq(name, "InactiveExitTimestamp"))
2974                         i->inactive_exit_timestamp = (usec_t) u;
2975                 else if (streq(name, "InactiveExitTimestampMonotonic"))
2976                         i->inactive_exit_timestamp_monotonic = (usec_t) u;
2977                 else if (streq(name, "ActiveExitTimestamp"))
2978                         i->active_exit_timestamp = (usec_t) u;
2979                 else if (streq(name, "ConditionTimestamp"))
2980                         i->condition_timestamp = (usec_t) u;
2981
2982                 break;
2983         }
2984
2985         case DBUS_TYPE_ARRAY: {
2986
2987                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
2988                     startswith(name, "Exec")) {
2989                         DBusMessageIter sub;
2990
2991                         dbus_message_iter_recurse(iter, &sub);
2992                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2993                                 ExecStatusInfo *info;
2994                                 int r;
2995
2996                                 info = new0(ExecStatusInfo, 1);
2997                                 if (!info)
2998                                         return -ENOMEM;
2999
3000                                 info->name = strdup(name);
3001                                 if (!info->name) {
3002                                         free(info);
3003                                         return -ENOMEM;
3004                                 }
3005
3006                                 r = exec_status_info_deserialize(&sub, info);
3007                                 if (r < 0) {
3008                                         free(info);
3009                                         return r;
3010                                 }
3011
3012                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
3013
3014                                 dbus_message_iter_next(&sub);
3015                         }
3016
3017                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
3018                            streq(name, "Listen")) {
3019                         DBusMessageIter sub, sub2;
3020
3021                         dbus_message_iter_recurse(iter, &sub);
3022                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
3023                                 const char *type, *path;
3024
3025                                 dbus_message_iter_recurse(&sub, &sub2);
3026
3027                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
3028                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0) {
3029                                         int r;
3030
3031                                         r = strv_extend(&i->listen, type);
3032                                         if (r < 0)
3033                                                 return r;
3034                                         r = strv_extend(&i->listen, path);
3035                                         if (r < 0)
3036                                                 return r;
3037                                 }
3038
3039                                 dbus_message_iter_next(&sub);
3040                         }
3041
3042                         return 0;
3043
3044                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING &&
3045                            streq(name, "DropInPaths")) {
3046                         int r = bus_parse_strv_iter(iter, &i->dropin_paths);
3047                         if (r < 0)
3048                                 return r;
3049
3050                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING &&
3051                            streq(name, "Documentation")) {
3052
3053                         DBusMessageIter sub;
3054
3055                         dbus_message_iter_recurse(iter, &sub);
3056                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING) {
3057                                 const char *s;
3058                                 int r;
3059
3060                                 dbus_message_iter_get_basic(&sub, &s);
3061
3062                                 r = strv_extend(&i->documentation, s);
3063                                 if (r < 0)
3064                                         return r;
3065
3066                                 dbus_message_iter_next(&sub);
3067                         }
3068
3069                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
3070                            streq(name, "Conditions")) {
3071                         DBusMessageIter sub, sub2;
3072
3073                         dbus_message_iter_recurse(iter, &sub);
3074                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
3075                                 const char *cond, *param;
3076                                 dbus_bool_t trigger, negate;
3077                                 dbus_int32_t state;
3078
3079                                 dbus_message_iter_recurse(&sub, &sub2);
3080                                 log_debug("here");
3081
3082                                 if(bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &cond, true) >= 0 &&
3083                                    bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &trigger, true) >= 0 &&
3084                                    bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &negate, true) >= 0 &&
3085                                    bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &param, true) >= 0 &&
3086                                    bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &state, false) >= 0) {
3087                                         log_debug("%s %d %d %s %d", cond, trigger, negate, param, state);
3088                                         if (state < 0 && (!trigger || !i->failed_condition)) {
3089                                                 i->failed_condition = cond;
3090                                                 i->failed_condition_trigger = trigger;
3091                                                 i->failed_condition_negate = negate;
3092                                                 i->failed_condition_param = param;
3093                                         }
3094                                 }
3095
3096                                 dbus_message_iter_next(&sub);
3097                         }
3098                 }
3099
3100                 break;
3101         }
3102
3103         case DBUS_TYPE_STRUCT: {
3104
3105                 if (streq(name, "LoadError")) {
3106                         DBusMessageIter sub;
3107                         const char *n, *message;
3108                         int r;
3109
3110                         dbus_message_iter_recurse(iter, &sub);
3111
3112                         r = bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &n, true);
3113                         if (r < 0)
3114                                 return r;
3115
3116                         r = bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &message, false);
3117                         if (r < 0)
3118                                 return r;
3119
3120                         if (!isempty(message))
3121                                 i->load_error = message;
3122                 }
3123
3124                 break;
3125         }
3126         }
3127
3128         return 0;
3129 }
3130
3131 static int print_property(const char *name, DBusMessageIter *iter) {
3132         assert(name);
3133         assert(iter);
3134
3135         /* This is a low-level property printer, see
3136          * print_status_info() for the nicer output */
3137
3138         if (arg_properties && !strv_find(arg_properties, name))
3139                 return 0;
3140
3141         switch (dbus_message_iter_get_arg_type(iter)) {
3142
3143         case DBUS_TYPE_STRUCT: {
3144                 DBusMessageIter sub;
3145                 dbus_message_iter_recurse(iter, &sub);
3146
3147                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
3148                         uint32_t u;
3149
3150                         dbus_message_iter_get_basic(&sub, &u);
3151
3152                         if (u)
3153                                 printf("%s=%u\n", name, (unsigned) u);
3154                         else if (arg_all)
3155                                 printf("%s=\n", name);
3156
3157                         return 0;
3158                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
3159                         const char *s;
3160
3161                         dbus_message_iter_get_basic(&sub, &s);
3162
3163                         if (arg_all || s[0])
3164                                 printf("%s=%s\n", name, s);
3165
3166                         return 0;
3167                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "LoadError")) {
3168                         const char *a = NULL, *b = NULL;
3169
3170                         if (bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &a, true) >= 0)
3171                                 bus_iter_get_basic_and_next(&sub, DBUS_TYPE_STRING, &b, false);
3172
3173                         if (arg_all || !isempty(a) || !isempty(b))
3174                                 printf("%s=%s \"%s\"\n", name, strempty(a), strempty(b));
3175
3176                         return 0;
3177                 }
3178
3179                 break;
3180         }
3181
3182         case DBUS_TYPE_ARRAY:
3183
3184                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "EnvironmentFiles")) {
3185                         DBusMessageIter sub, sub2;
3186
3187                         dbus_message_iter_recurse(iter, &sub);
3188                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
3189                                 const char *path;
3190                                 dbus_bool_t ignore;
3191
3192                                 dbus_message_iter_recurse(&sub, &sub2);
3193
3194                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
3195                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, false) >= 0)
3196                                         printf("EnvironmentFile=%s (ignore_errors=%s)\n", path, yes_no(ignore));
3197
3198                                 dbus_message_iter_next(&sub);
3199                         }
3200
3201                         return 0;
3202
3203                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
3204                         DBusMessageIter sub, sub2;
3205
3206                         dbus_message_iter_recurse(iter, &sub);
3207
3208                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
3209                                 const char *type, *path;
3210
3211                                 dbus_message_iter_recurse(&sub, &sub2);
3212
3213                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
3214                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
3215                                         printf("%s=%s\n", type, path);
3216
3217                                 dbus_message_iter_next(&sub);
3218                         }
3219
3220                         return 0;
3221
3222                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Listen")) {
3223                         DBusMessageIter sub, sub2;
3224
3225                         dbus_message_iter_recurse(iter, &sub);
3226                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
3227                                 const char *type, *path;
3228
3229                                 dbus_message_iter_recurse(&sub, &sub2);
3230
3231                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
3232                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
3233                                         printf("Listen%s=%s\n", type, path);
3234
3235                                 dbus_message_iter_next(&sub);
3236                         }
3237
3238                         return 0;
3239
3240                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
3241                         DBusMessageIter sub, sub2;
3242
3243                         dbus_message_iter_recurse(iter, &sub);
3244                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
3245                                 const char *base;
3246                                 uint64_t value, next_elapse;
3247
3248                                 dbus_message_iter_recurse(&sub, &sub2);
3249
3250                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
3251                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
3252                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
3253                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
3254
3255                                         printf("%s={ value=%s ; next_elapse=%s }\n",
3256                                                base,
3257                                                format_timespan(timespan1, sizeof(timespan1), value, 0),
3258                                                format_timespan(timespan2, sizeof(timespan2), next_elapse, 0));
3259                                 }
3260
3261                                 dbus_message_iter_next(&sub);
3262                         }
3263
3264                         return 0;
3265
3266                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
3267                         DBusMessageIter sub;
3268
3269                         dbus_message_iter_recurse(iter, &sub);
3270                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
3271                                 ExecStatusInfo info = {};
3272
3273                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
3274                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
3275                                         _cleanup_free_ char *t;
3276
3277                                         t = strv_join(info.argv, " ");
3278
3279                                         printf("%s={ path=%s ; argv[]=%s ; ignore_errors=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
3280                                                name,
3281                                                strna(info.path),
3282                                                strna(t),
3283                                                yes_no(info.ignore),
3284                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
3285                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
3286                                                (unsigned) info. pid,
3287                                                sigchld_code_to_string(info.code),
3288                                                info.status,
3289                                                info.code == CLD_EXITED ? "" : "/",
3290                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
3291                                 }
3292
3293                                 free(info.path);
3294                                 strv_free(info.argv);
3295
3296                                 dbus_message_iter_next(&sub);
3297                         }
3298
3299                         return 0;
3300
3301                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "DeviceAllow")) {
3302                         DBusMessageIter sub, sub2;
3303
3304                         dbus_message_iter_recurse(iter, &sub);
3305                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
3306                                 const char *path, *rwm;
3307
3308                                 dbus_message_iter_recurse(&sub, &sub2);
3309
3310                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
3311                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &rwm, false) >= 0)
3312                                         printf("%s=%s %s\n", name, strna(path), strna(rwm));
3313
3314                                 dbus_message_iter_next(&sub);
3315                         }
3316                         return 0;
3317
3318                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && (streq(name, "BlockIOReadBandwidth") || streq(name, "BlockIOWriteBandwidth"))) {
3319                         DBusMessageIter sub, sub2;
3320
3321                         dbus_message_iter_recurse(iter, &sub);
3322                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
3323                                 const char *path;
3324                                 uint64_t bandwidth;
3325
3326                                 dbus_message_iter_recurse(&sub, &sub2);
3327
3328                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) >= 0 &&
3329                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &bandwidth, false) >= 0)
3330                                         printf("%s=%s %" PRIu64 "\n", name, strna(path), bandwidth);
3331
3332                                 dbus_message_iter_next(&sub);
3333                         }
3334                         return 0;
3335                 }
3336
3337
3338                 break;
3339         }
3340
3341         if (generic_print_property(name, iter, arg_all) > 0)
3342                 return 0;
3343
3344         if (arg_all)
3345                 printf("%s=[unprintable]\n", name);
3346
3347         return 0;
3348 }
3349
3350 static int show_one(const char *verb,
3351                     DBusConnection *bus,
3352                     const char *path,
3353                     bool show_properties,
3354                     bool *new_line,
3355                     bool *ellipsized) {
3356         _cleanup_free_ DBusMessage *reply = NULL;
3357         const char *interface = "";
3358         int r;
3359         DBusMessageIter iter, sub, sub2, sub3;
3360         UnitStatusInfo info = {};
3361         ExecStatusInfo *p;
3362
3363         assert(path);
3364         assert(new_line);
3365
3366         r = bus_method_call_with_reply(
3367                         bus,
3368                         "org.freedesktop.systemd1",
3369                         path,
3370                         "org.freedesktop.DBus.Properties",
3371                         "GetAll",
3372                         &reply,
3373                         NULL,
3374                         DBUS_TYPE_STRING, &interface,
3375                         DBUS_TYPE_INVALID);
3376         if (r < 0)
3377                 return r;
3378
3379         if (!dbus_message_iter_init(reply, &iter) ||
3380             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
3381             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
3382                 log_error("Failed to parse reply.");
3383                 return -EIO;
3384         }
3385
3386         dbus_message_iter_recurse(&iter, &sub);
3387
3388         if (*new_line)
3389                 printf("\n");
3390
3391         *new_line = true;
3392
3393         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
3394                 const char *name;
3395
3396                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_DICT_ENTRY);
3397                 dbus_message_iter_recurse(&sub, &sub2);
3398
3399                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
3400                     dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT) {
3401                         log_error("Failed to parse reply.");
3402                         return -EIO;
3403                 }
3404
3405                 dbus_message_iter_recurse(&sub2, &sub3);
3406
3407                 if (show_properties)
3408                         r = print_property(name, &sub3);
3409                 else
3410                         r = status_property(name, &sub3, &info);
3411                 if (r < 0) {
3412                         log_error("Failed to parse reply.");
3413                         return -EIO;
3414                 }
3415
3416                 dbus_message_iter_next(&sub);
3417         }
3418
3419         r = 0;
3420
3421         if (!show_properties) {
3422                 if (streq(verb, "help"))
3423                         show_unit_help(&info);
3424                 else
3425                         print_status_info(&info, ellipsized);
3426         }
3427
3428         strv_free(info.documentation);
3429         strv_free(info.dropin_paths);
3430         strv_free(info.listen);
3431
3432         if (!streq_ptr(info.active_state, "active") &&
3433             !streq_ptr(info.active_state, "reloading") &&
3434             streq(verb, "status")) {
3435                 /* According to LSB: "program not running" */
3436                 /* 0: program is running or service is OK
3437                  * 1: program is dead and /var/run pid file exists
3438                  * 2: program is dead and /var/lock lock file exists
3439                  * 3: program is not running
3440                  * 4: program or service status is unknown
3441                  */
3442                 if (info.pid_file && access(info.pid_file, F_OK) == 0)
3443                         r = 1;
3444                 else
3445                         r = 3;
3446         }
3447
3448         while ((p = info.exec)) {
3449                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
3450                 exec_status_info_free(p);
3451         }
3452
3453         return r;
3454 }
3455
3456 static int show_one_by_pid(const char *verb,
3457                            DBusConnection *bus,
3458                            uint32_t pid,
3459                            bool *new_line,
3460                            bool *ellipsized) {
3461         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3462         const char *path = NULL;
3463         _cleanup_dbus_error_free_ DBusError error;
3464         int r;
3465
3466         dbus_error_init(&error);
3467
3468         r = bus_method_call_with_reply(
3469                         bus,
3470                         "org.freedesktop.systemd1",
3471                         "/org/freedesktop/systemd1",
3472                         "org.freedesktop.systemd1.Manager",
3473                         "GetUnitByPID",
3474                         &reply,
3475                         NULL,
3476                         DBUS_TYPE_UINT32, &pid,
3477                         DBUS_TYPE_INVALID);
3478         if (r < 0)
3479                 return r;
3480
3481         if (!dbus_message_get_args(reply, &error,
3482                                    DBUS_TYPE_OBJECT_PATH, &path,
3483                                    DBUS_TYPE_INVALID)) {
3484                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3485                 return -EIO;
3486         }
3487
3488         r = show_one(verb, bus, path, false, new_line, ellipsized);
3489         return r;
3490 }
3491
3492 static int show_all(const char* verb,
3493                     DBusConnection *bus,
3494                     bool show_properties,
3495                     bool *new_line,
3496                     bool *ellipsized) {
3497         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3498         _cleanup_free_ struct unit_info *unit_infos = NULL;
3499         unsigned c = 0;
3500         const struct unit_info *u;
3501         int r;
3502
3503         r = get_unit_list(bus, &reply, &unit_infos, &c);
3504         if (r < 0)
3505                 return r;
3506
3507         qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
3508
3509         for (u = unit_infos; u < unit_infos + c; u++) {
3510                 _cleanup_free_ char *p = NULL;
3511
3512                 if (!output_show_unit(u))
3513                         continue;
3514
3515                 p = unit_dbus_path_from_name(u->id);
3516                 if (!p)
3517                         return log_oom();
3518
3519                 printf("%s -> '%s'\n", u->id, p);
3520
3521                 r = show_one(verb, bus, p, show_properties, new_line, ellipsized);
3522                 if (r != 0)
3523                         return r;
3524         }
3525
3526         return 0;
3527 }
3528
3529 static int show(DBusConnection *bus, char **args) {
3530         int r, ret = 0;
3531         bool show_properties, show_status, new_line = false;
3532         char **name;
3533         bool ellipsized = false;
3534
3535         assert(bus);
3536         assert(args);
3537
3538         show_properties = streq(args[0], "show");
3539         show_status = streq(args[0], "status");
3540
3541         if (show_properties)
3542                 pager_open_if_enabled();
3543
3544         /* If no argument is specified inspect the manager itself */
3545
3546         if (show_properties && strv_length(args) <= 1)
3547                 return show_one(args[0], bus, "/org/freedesktop/systemd1", show_properties, &new_line, &ellipsized);
3548
3549         if (show_status && strv_length(args) <= 1)
3550                 ret = show_all(args[0], bus, false, &new_line, &ellipsized);
3551         else
3552                 STRV_FOREACH(name, args+1) {
3553                         uint32_t id;
3554
3555                         if (safe_atou32(*name, &id) < 0) {
3556                                 _cleanup_free_ char *p = NULL, *n = NULL;
3557                                 /* Interpret as unit name */
3558
3559                                 n = unit_name_mangle(*name);
3560                                 if (!n)
3561                                         return log_oom();
3562
3563                                 p = unit_dbus_path_from_name(n);
3564                                 if (!p)
3565                                         return log_oom();
3566
3567                                 r = show_one(args[0], bus, p, show_properties, &new_line, &ellipsized);
3568                                 if (r != 0)
3569                                         ret = r;
3570
3571                         } else if (show_properties) {
3572                                 _cleanup_free_ char *p = NULL;
3573
3574                                 /* Interpret as job id */
3575                                 if (asprintf(&p, "/org/freedesktop/systemd1/job/%u", id) < 0)
3576                                         return log_oom();
3577
3578                                 r = show_one(args[0], bus, p, show_properties, &new_line, &ellipsized);
3579                                 if (r != 0)
3580                                         ret = r;
3581
3582                         } else {
3583                                 /* Interpret as PID */
3584                                 r = show_one_by_pid(args[0], bus, id, &new_line, &ellipsized);
3585                                 if (r != 0)
3586                                         ret = r;
3587                         }
3588                 }
3589
3590         if (ellipsized && !arg_quiet)
3591                 printf("Hint: Some lines were ellipsized, use -l to show in full.\n");
3592
3593         return ret;
3594 }
3595
3596 static int append_assignment(DBusMessageIter *iter, const char *assignment) {
3597         const char *eq;
3598         char *field;
3599         DBusMessageIter sub;
3600         int r;
3601
3602         assert(iter);
3603         assert(assignment);
3604
3605         eq = strchr(assignment, '=');
3606         if (!eq) {
3607                 log_error("Not an assignment: %s", assignment);
3608                 return -EINVAL;
3609         }
3610
3611         field = strndupa(assignment, eq - assignment);
3612         eq ++;
3613
3614         if (!dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING, &field))
3615                 return log_oom();
3616
3617         if (streq(field, "CPUAccounting") ||
3618             streq(field, "MemoryAccounting") ||
3619             streq(field, "BlockIOAccounting")) {
3620                 dbus_bool_t b;
3621
3622                 r = parse_boolean(eq);
3623                 if (r < 0) {
3624                         log_error("Failed to parse boolean assignment %s.", assignment);
3625                         return -EINVAL;
3626                 }
3627
3628                 b = r;
3629                 if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, "b", &sub) ||
3630                     !dbus_message_iter_append_basic(&sub, DBUS_TYPE_BOOLEAN, &b))
3631                         return log_oom();
3632
3633         } else if (streq(field, "MemoryLimit") || streq(field, "MemorySoftLimit")) {
3634                 off_t bytes;
3635                 uint64_t u;
3636
3637                 r = parse_bytes(eq, &bytes);
3638                 if (r < 0) {
3639                         log_error("Failed to parse bytes specification %s", assignment);
3640                         return -EINVAL;
3641                 }
3642
3643                 u = bytes;
3644                 if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, "t", &sub) ||
3645                     !dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT64, &u))
3646                         return log_oom();
3647
3648         } else if (streq(field, "CPUShares") || streq(field, "BlockIOWeight")) {
3649                 uint64_t u;
3650
3651                 r = safe_atou64(eq, &u);
3652                 if (r < 0) {
3653                         log_error("Failed to parse %s value %s.", field, eq);
3654                         return -EINVAL;
3655                 }
3656
3657                 if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, "t", &sub) ||
3658                     !dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT64, &u))
3659                         return log_oom();
3660
3661         } else if (streq(field, "DevicePolicy")) {
3662
3663                 if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, "s", &sub) ||
3664                     !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &eq))
3665                         return log_oom();
3666
3667         } else if (streq(field, "DeviceAllow")) {
3668                 DBusMessageIter sub2;
3669
3670                 if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, "a(ss)", &sub) ||
3671                     !dbus_message_iter_open_container(&sub, DBUS_TYPE_ARRAY, "(ss)", &sub2))
3672                         return log_oom();
3673
3674                 if (!isempty(eq)) {
3675                         const char *path, *rwm;
3676                         DBusMessageIter sub3;
3677                         char *e;
3678
3679                         e = strchr(eq, ' ');
3680                         if (e) {
3681                                 path = strndupa(eq, e - eq);
3682                                 rwm = e+1;
3683                         } else {
3684                                 path = eq;
3685                                 rwm = "";
3686                         }
3687
3688                         if (!path_startswith(path, "/dev")) {
3689                                 log_error("%s is not a device file in /dev.", path);
3690                                 return -EINVAL;
3691                         }
3692
3693                         if (!dbus_message_iter_open_container(&sub2, DBUS_TYPE_STRUCT, NULL, &sub3) ||
3694                             !dbus_message_iter_append_basic(&sub3, DBUS_TYPE_STRING, &path) ||
3695                             !dbus_message_iter_append_basic(&sub3, DBUS_TYPE_STRING, &rwm) ||
3696                             !dbus_message_iter_close_container(&sub2, &sub3))
3697                                 return log_oom();
3698                 }
3699
3700                 if (!dbus_message_iter_close_container(&sub, &sub2))
3701                         return log_oom();
3702
3703         } else if (streq(field, "BlockIOReadBandwidth") || streq(field, "BlockIOWriteBandwidth")) {
3704                 DBusMessageIter sub2;
3705
3706                 if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, "a(st)", &sub) ||
3707                     !dbus_message_iter_open_container(&sub, DBUS_TYPE_ARRAY, "(st)", &sub2))
3708                         return log_oom();
3709
3710                 if (!isempty(eq)) {
3711                         const char *path, *bandwidth;
3712                         DBusMessageIter sub3;
3713                         uint64_t u;
3714                         off_t bytes;
3715                         char *e;
3716
3717                         e = strchr(eq, ' ');
3718                         if (e) {
3719                                 path = strndupa(eq, e - eq);
3720                                 bandwidth = e+1;
3721                         } else {
3722                                 log_error("Failed to parse %s value %s.", field, eq);
3723                                 return -EINVAL;
3724                         }
3725
3726                         if (!path_startswith(path, "/dev")) {
3727                                 log_error("%s is not a device file in /dev.", path);
3728                                 return -EINVAL;
3729                         }
3730
3731                         r = parse_bytes(bandwidth, &bytes);
3732                         if (r < 0) {
3733                                 log_error("Failed to parse byte value %s.", bandwidth);
3734                                 return -EINVAL;
3735                         }
3736
3737                         u = (uint64_t) bytes;
3738
3739                         if (!dbus_message_iter_open_container(&sub2, DBUS_TYPE_STRUCT, NULL, &sub3) ||
3740                             !dbus_message_iter_append_basic(&sub3, DBUS_TYPE_STRING, &path) ||
3741                             !dbus_message_iter_append_basic(&sub3, DBUS_TYPE_UINT64, &u) ||
3742                             !dbus_message_iter_close_container(&sub2, &sub3))
3743                                 return log_oom();
3744                 }
3745
3746                 if (!dbus_message_iter_close_container(&sub, &sub2))
3747                         return log_oom();
3748
3749         } else {
3750                 log_error("Unknown assignment %s.", assignment);
3751                 return -EINVAL;
3752         }
3753
3754         if (!dbus_message_iter_close_container(iter, &sub))
3755                 return log_oom();
3756
3757         return 0;
3758 }
3759
3760 static int set_property(DBusConnection *bus, char **args) {
3761
3762         _cleanup_free_ DBusMessage *m = NULL, *reply = NULL;
3763         DBusMessageIter iter, sub;
3764         dbus_bool_t runtime;
3765         DBusError error;
3766         char **i;
3767         int r;
3768
3769         dbus_error_init(&error);
3770
3771         m = dbus_message_new_method_call(
3772                         "org.freedesktop.systemd1",
3773                         "/org/freedesktop/systemd1",
3774                         "org.freedesktop.systemd1.Manager",
3775                         "SetUnitProperties");
3776         if (!m)
3777                 return log_oom();
3778
3779         dbus_message_iter_init_append(m, &iter);
3780
3781         runtime = arg_runtime;
3782
3783         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &args[1]) ||
3784             !dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &runtime) ||
3785             !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sv)", &sub))
3786                 return log_oom();
3787
3788         STRV_FOREACH(i, args + 2) {
3789                 DBusMessageIter sub2;
3790
3791                 if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
3792                         return log_oom();
3793
3794                 r = append_assignment(&sub2, *i);
3795                 if (r < 0)
3796                         return r;
3797
3798                 if (!dbus_message_iter_close_container(&sub, &sub2))
3799                         return log_oom();
3800
3801         }
3802
3803         if (!dbus_message_iter_close_container(&iter, &sub))
3804                 return log_oom();
3805
3806         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
3807         if (!reply) {
3808                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3809                 dbus_error_free(&error);
3810                 return -EIO;
3811         }
3812
3813         return 0;
3814 }
3815
3816 static int snapshot(DBusConnection *bus, char **args) {
3817         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
3818         DBusError error;
3819         int r;
3820         dbus_bool_t cleanup = FALSE;
3821         DBusMessageIter iter, sub;
3822         const char
3823                 *path, *id,
3824                 *interface = "org.freedesktop.systemd1.Unit",
3825                 *property = "Id";
3826         _cleanup_free_ char *n = NULL;
3827
3828         dbus_error_init(&error);
3829
3830         if (strv_length(args) > 1)
3831                 n = unit_name_mangle_with_suffix(args[1], ".snapshot");
3832         else
3833                 n = strdup("");
3834         if (!n)
3835                 return log_oom();
3836
3837         r = bus_method_call_with_reply(
3838                         bus,
3839                         "org.freedesktop.systemd1",
3840                         "/org/freedesktop/systemd1",
3841                         "org.freedesktop.systemd1.Manager",
3842                         "CreateSnapshot",
3843                         &reply,
3844                         NULL,
3845                         DBUS_TYPE_STRING, &n,
3846                         DBUS_TYPE_BOOLEAN, &cleanup,
3847                         DBUS_TYPE_INVALID);
3848         if (r < 0)
3849                 return r;
3850
3851         if (!dbus_message_get_args(reply, &error,
3852                                    DBUS_TYPE_OBJECT_PATH, &path,
3853                                    DBUS_TYPE_INVALID)) {
3854                 log_error("Failed to parse reply: %s", bus_error_message(&error));
3855                 dbus_error_free(&error);
3856                 return -EIO;
3857         }
3858
3859         dbus_message_unref(reply);
3860         reply = NULL;
3861
3862         r = bus_method_call_with_reply (
3863                         bus,
3864                         "org.freedesktop.systemd1",
3865                         path,
3866                         "org.freedesktop.DBus.Properties",
3867                         "Get",
3868                         &reply,
3869                         NULL,
3870                         DBUS_TYPE_STRING, &interface,
3871                         DBUS_TYPE_STRING, &property,
3872                         DBUS_TYPE_INVALID);
3873         if (r < 0)
3874                 return r;
3875
3876         if (!dbus_message_iter_init(reply, &iter) ||
3877             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3878                 log_error("Failed to parse reply.");
3879                 return -EIO;
3880         }
3881
3882         dbus_message_iter_recurse(&iter, &sub);
3883
3884         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
3885                 log_error("Failed to parse reply.");
3886                 return -EIO;
3887         }
3888
3889         dbus_message_iter_get_basic(&sub, &id);
3890
3891         if (!arg_quiet)
3892                 puts(id);
3893
3894         return 0;
3895 }
3896
3897 static int delete_snapshot(DBusConnection *bus, char **args) {
3898         char **name;
3899
3900         assert(args);
3901
3902         STRV_FOREACH(name, args+1) {
3903                 _cleanup_free_ char *n = NULL;
3904                 int r;
3905
3906                 n = unit_name_mangle_with_suffix(*name, ".snapshot");
3907                 if (!n)
3908                         return log_oom();
3909
3910                 r = bus_method_call_with_reply(
3911                                 bus,
3912                                 "org.freedesktop.systemd1",
3913                                 "/org/freedesktop/systemd1",
3914                                 "org.freedesktop.systemd1.Manager",
3915                                 "RemoveSnapshot",
3916                                 NULL,
3917                                 NULL,
3918                                 DBUS_TYPE_STRING, &n,
3919                                 DBUS_TYPE_INVALID);
3920                 if (r < 0)
3921                         return r;
3922         }
3923
3924         return 0;
3925 }
3926
3927 static int daemon_reload(DBusConnection *bus, char **args) {
3928         int r;
3929         const char *method;
3930         DBusError error;
3931
3932         if (arg_action == ACTION_RELOAD)
3933                 method = "Reload";
3934         else if (arg_action == ACTION_REEXEC)
3935                 method = "Reexecute";
3936         else {
3937                 assert(arg_action == ACTION_SYSTEMCTL);
3938
3939                 method =
3940                         streq(args[0], "clear-jobs")    ||
3941                         streq(args[0], "cancel")        ? "ClearJobs" :
3942                         streq(args[0], "daemon-reexec") ? "Reexecute" :
3943                         streq(args[0], "reset-failed")  ? "ResetFailed" :
3944                         streq(args[0], "halt")          ? "Halt" :
3945                         streq(args[0], "poweroff")      ? "PowerOff" :
3946                         streq(args[0], "reboot")        ? "Reboot" :
3947                         streq(args[0], "kexec")         ? "KExec" :
3948                         streq(args[0], "exit")          ? "Exit" :
3949                                     /* "daemon-reload" */ "Reload";
3950         }
3951
3952         r = bus_method_call_with_reply(
3953                         bus,
3954                         "org.freedesktop.systemd1",
3955                         "/org/freedesktop/systemd1",
3956                         "org.freedesktop.systemd1.Manager",
3957                         method,
3958                         NULL,
3959                         &error,
3960                         DBUS_TYPE_INVALID);
3961
3962         if (r == -ENOENT && arg_action != ACTION_SYSTEMCTL)
3963                 /* There's always a fallback possible for
3964                  * legacy actions. */
3965                 r = -EADDRNOTAVAIL;
3966         else if ((r == -ETIMEDOUT || r == -ECONNRESET) && streq(method, "Reexecute"))
3967                 /* On reexecution, we expect a disconnect, not a
3968                  * reply */
3969                 r = 0;
3970         else if (r < 0)
3971                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3972
3973         dbus_error_free(&error);
3974         return r;
3975 }
3976
3977 static int reset_failed(DBusConnection *bus, char **args) {
3978         int r = 0;
3979         char **name;
3980
3981         if (strv_length(args) <= 1)
3982                 return daemon_reload(bus, args);
3983
3984         STRV_FOREACH(name, args+1) {
3985                 _cleanup_free_ char *n;
3986
3987                 n = unit_name_mangle(*name);
3988                 if (!n)
3989                         return log_oom();
3990
3991                 r = bus_method_call_with_reply(
3992                                 bus,
3993                                 "org.freedesktop.systemd1",
3994                                 "/org/freedesktop/systemd1",
3995                                 "org.freedesktop.systemd1.Manager",
3996                                 "ResetFailedUnit",
3997                                 NULL,
3998                                 NULL,
3999                                 DBUS_TYPE_STRING, &n,
4000                                 DBUS_TYPE_INVALID);
4001                 if (r < 0)
4002                         return r;
4003         }
4004
4005         return 0;
4006 }
4007
4008 static int show_enviroment(DBusConnection *bus, char **args) {
4009         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
4010         DBusMessageIter iter, sub, sub2;
4011         int r;
4012         const char
4013                 *interface = "org.freedesktop.systemd1.Manager",
4014                 *property = "Environment";
4015
4016         pager_open_if_enabled();
4017
4018         r = bus_method_call_with_reply(
4019                         bus,
4020                         "org.freedesktop.systemd1",
4021                         "/org/freedesktop/systemd1",
4022                         "org.freedesktop.DBus.Properties",
4023                         "Get",
4024                         &reply,
4025                         NULL,
4026                         DBUS_TYPE_STRING, &interface,
4027                         DBUS_TYPE_STRING, &property,
4028                         DBUS_TYPE_INVALID);
4029         if (r < 0)
4030                 return r;
4031
4032         if (!dbus_message_iter_init(reply, &iter) ||
4033             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
4034                 log_error("Failed to parse reply.");
4035                 return -EIO;
4036         }
4037
4038         dbus_message_iter_recurse(&iter, &sub);
4039
4040         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
4041             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
4042                 log_error("Failed to parse reply.");
4043                 return -EIO;
4044         }
4045
4046         dbus_message_iter_recurse(&sub, &sub2);
4047
4048         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
4049                 const char *text;
4050
4051                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
4052                         log_error("Failed to parse reply.");
4053                         return -EIO;
4054                 }
4055
4056                 dbus_message_iter_get_basic(&sub2, &text);
4057                 puts(text);
4058
4059                 dbus_message_iter_next(&sub2);
4060         }
4061
4062         return 0;
4063 }
4064
4065 static int switch_root(DBusConnection *bus, char **args) {
4066         unsigned l;
4067         const char *root;
4068         _cleanup_free_ char *init = NULL;
4069
4070         l = strv_length(args);
4071         if (l < 2 || l > 3) {
4072                 log_error("Wrong number of arguments.");
4073                 return -EINVAL;
4074         }
4075
4076         root = args[1];
4077
4078         if (l >= 3)
4079                 init = strdup(args[2]);
4080         else {
4081                 parse_env_file("/proc/cmdline", WHITESPACE,
4082                                "init", &init,
4083                                NULL);
4084
4085                 if (!init)
4086                         init = strdup("");
4087         }
4088         if (!init)
4089                 return log_oom();
4090
4091         log_debug("switching root - root: %s; init: %s", root, init);
4092
4093         return bus_method_call_with_reply(
4094                         bus,
4095                         "org.freedesktop.systemd1",
4096                         "/org/freedesktop/systemd1",
4097                         "org.freedesktop.systemd1.Manager",
4098                         "SwitchRoot",
4099                         NULL,
4100                         NULL,
4101                         DBUS_TYPE_STRING, &root,
4102                         DBUS_TYPE_STRING, &init,
4103                         DBUS_TYPE_INVALID);
4104 }
4105
4106 static int set_environment(DBusConnection *bus, char **args) {
4107         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
4108         DBusError error;
4109         const char *method;
4110         DBusMessageIter iter;
4111         int r;
4112
4113         assert(bus);
4114         assert(args);
4115
4116         dbus_error_init(&error);
4117
4118         method = streq(args[0], "set-environment")
4119                 ? "SetEnvironment"
4120                 : "UnsetEnvironment";
4121
4122         m = dbus_message_new_method_call(
4123                         "org.freedesktop.systemd1",
4124                         "/org/freedesktop/systemd1",
4125                         "org.freedesktop.systemd1.Manager",
4126                         method);
4127         if (!m)
4128                 return log_oom();
4129
4130         dbus_message_iter_init_append(m, &iter);
4131
4132         r = bus_append_strv_iter(&iter, args + 1);
4133         if (r < 0)
4134                 return log_oom();
4135
4136         reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
4137         if (!reply) {
4138                 log_error("Failed to issue method call: %s", bus_error_message(&error));
4139                 dbus_error_free(&error);
4140                 return -EIO;
4141         }
4142
4143         return 0;
4144 }
4145
4146 static int enable_sysv_units(char **args) {
4147         int r = 0;
4148
4149 #if defined(HAVE_SYSV_COMPAT) && defined(HAVE_CHKCONFIG)
4150         const char *verb = args[0];
4151         unsigned f = 1, t = 1;
4152         LookupPaths paths = {};
4153
4154         if (arg_scope != UNIT_FILE_SYSTEM)
4155                 return 0;
4156
4157         if (!streq(verb, "enable") &&
4158             !streq(verb, "disable") &&
4159             !streq(verb, "is-enabled"))
4160                 return 0;
4161
4162         /* Processes all SysV units, and reshuffles the array so that
4163          * afterwards only the native units remain */
4164
4165         r = lookup_paths_init(&paths, SYSTEMD_SYSTEM, false, NULL, NULL, NULL);
4166         if (r < 0)
4167                 return r;
4168
4169         r = 0;
4170         for (f = 1; args[f]; f++) {
4171                 const char *name;
4172                 _cleanup_free_ char *p = NULL, *q = NULL;
4173                 bool found_native = false, found_sysv;
4174                 unsigned c = 1;
4175                 const char *argv[6] = { "/sbin/chkconfig", NULL, NULL, NULL, NULL };
4176                 char **k, *l;
4177                 int j;
4178                 pid_t pid;
4179                 siginfo_t status;
4180
4181                 name = args[f];
4182
4183                 if (!endswith(name, ".service"))
4184                         continue;
4185
4186                 if (path_is_absolute(name))
4187                         continue;
4188
4189                 STRV_FOREACH(k, paths.unit_path) {
4190                         if (!isempty(arg_root))
4191                                 asprintf(&p, "%s/%s/%s", arg_root, *k, name);
4192                         else
4193                                 asprintf(&p, "%s/%s", *k, name);
4194
4195                         if (!p) {
4196                                 r = log_oom();
4197                                 goto finish;
4198                         }
4199
4200                         found_native = access(p, F_OK) >= 0;
4201                         free(p);
4202                         p = NULL;
4203
4204                         if (found_native)
4205                                 break;
4206                 }
4207
4208                 if (found_native)
4209                         continue;
4210
4211                 if (!isempty(arg_root))
4212                         asprintf(&p, "%s/" SYSTEM_SYSVINIT_PATH "/%s", arg_root, name);
4213                 else
4214                         asprintf(&p, SYSTEM_SYSVINIT_PATH "/%s", name);
4215                 if (!p) {
4216                         r = log_oom();
4217                         goto finish;
4218                 }
4219
4220                 p[strlen(p) - sizeof(".service") + 1] = 0;
4221                 found_sysv = access(p, F_OK) >= 0;
4222
4223                 if (!found_sysv)
4224                         continue;
4225
4226                 /* Mark this entry, so that we don't try enabling it as native unit */
4227                 args[f] = (char*) "";
4228
4229                 log_info("%s is not a native service, redirecting to /sbin/chkconfig.", name);
4230
4231                 if (!isempty(arg_root))
4232                         argv[c++] = q = strappend("--root=", arg_root);
4233
4234                 argv[c++] = path_get_file_name(p);
4235                 argv[c++] =
4236                         streq(verb, "enable") ? "on" :
4237                         streq(verb, "disable") ? "off" : "--level=5";
4238                 argv[c] = NULL;
4239
4240                 l = strv_join((char**)argv, " ");
4241                 if (!l) {
4242                         r = log_oom();
4243                         goto finish;
4244                 }
4245
4246                 log_info("Executing %s", l);
4247                 free(l);
4248
4249                 pid = fork();
4250                 if (pid < 0) {
4251                         log_error("Failed to fork: %m");
4252                         r = -errno;
4253                         goto finish;
4254                 } else if (pid == 0) {
4255                         /* Child */
4256
4257                         execv(argv[0], (char**) argv);
4258                         _exit(EXIT_FAILURE);
4259                 }
4260
4261                 j = wait_for_terminate(pid, &status);
4262                 if (j < 0) {
4263                         log_error("Failed to wait for child: %s", strerror(-r));
4264                         r = j;
4265                         goto finish;
4266                 }
4267
4268                 if (status.si_code == CLD_EXITED) {
4269                         if (streq(verb, "is-enabled")) {
4270                                 if (status.si_status == 0) {
4271                                         if (!arg_quiet)
4272                                                 puts("enabled");
4273                                         r = 1;
4274                                 } else {
4275                                         if (!arg_quiet)
4276                                                 puts("disabled");
4277                                 }
4278
4279                         } else if (status.si_status != 0) {
4280                                 r = -EINVAL;
4281                                 goto finish;
4282                         }
4283                 } else {
4284                         r = -EPROTO;
4285                         goto finish;
4286                 }
4287         }
4288
4289 finish:
4290         lookup_paths_free(&paths);
4291
4292         /* Drop all SysV units */
4293         for (f = 1, t = 1; args[f]; f++) {
4294
4295                 if (isempty(args[f]))
4296                         continue;
4297
4298                 args[t++] = args[f];
4299         }
4300
4301         args[t] = NULL;
4302
4303 #endif
4304         return r;
4305 }
4306
4307 static int mangle_names(char **original_names, char ***mangled_names) {
4308         char **i, **l, **name;
4309
4310         l = new(char*, strv_length(original_names) + 1);
4311         if (!l)
4312                 return log_oom();
4313
4314         i = l;
4315         STRV_FOREACH(name, original_names) {
4316
4317                 /* When enabling units qualified path names are OK,
4318                  * too, hence allow them explicitly. */
4319
4320                 if (is_path(*name))
4321                         *i = strdup(*name);
4322                 else
4323                         *i = unit_name_mangle(*name);
4324
4325                 if (!*i) {
4326                         strv_free(l);
4327                         return log_oom();
4328                 }
4329
4330                 i++;
4331         }
4332
4333         *i = NULL;
4334         *mangled_names = l;
4335
4336         return 0;
4337 }
4338
4339 static int enable_unit(DBusConnection *bus, char **args) {
4340         const char *verb = args[0];
4341         UnitFileChange *changes = NULL;
4342         unsigned n_changes = 0, i;
4343         int carries_install_info = -1;
4344         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
4345         int r;
4346         _cleanup_dbus_error_free_ DBusError error;
4347         _cleanup_strv_free_ char **mangled_names = NULL;
4348
4349         dbus_error_init(&error);
4350
4351         r = enable_sysv_units(args);
4352         if (r < 0)
4353                 return r;
4354
4355         if (!args[1])
4356                 return 0;
4357
4358         r = mangle_names(args+1, &mangled_names);
4359         if (r < 0)
4360                 goto finish;
4361
4362         if (!bus || avoid_bus()) {
4363                 if (streq(verb, "enable")) {
4364                         r = unit_file_enable(arg_scope, arg_runtime, arg_root, mangled_names, arg_force, &changes, &n_changes);
4365                         carries_install_info = r;
4366                 } else if (streq(verb, "disable"))
4367                         r = unit_file_disable(arg_scope, arg_runtime, arg_root, mangled_names, &changes, &n_changes);
4368                 else if (streq(verb, "reenable")) {
4369                         r = unit_file_reenable(arg_scope, arg_runtime, arg_root, mangled_names, arg_force, &changes, &n_changes);
4370                         carries_install_info = r;
4371                 } else if (streq(verb, "link"))
4372                         r = unit_file_link(arg_scope, arg_runtime, arg_root, mangled_names, arg_force, &changes, &n_changes);
4373                 else if (streq(verb, "preset")) {
4374                         r = unit_file_preset(arg_scope, arg_runtime, arg_root, mangled_names, arg_force, &changes, &n_changes);
4375                         carries_install_info = r;
4376                 } else if (streq(verb, "mask"))
4377                         r = unit_file_mask(arg_scope, arg_runtime, arg_root, mangled_names, arg_force, &changes, &n_changes);
4378                 else if (streq(verb, "unmask"))
4379                         r = unit_file_unmask(arg_scope, arg_runtime, arg_root, mangled_names, &changes, &n_changes);
4380                 else if (streq(verb, "set-default"))
4381                         r = unit_file_set_default(arg_scope, arg_root, args[1], &changes, &n_changes);
4382                 else
4383                         assert_not_reached("Unknown verb");
4384
4385                 if (r < 0) {
4386                         log_error("Operation failed: %s", strerror(-r));
4387                         goto finish;
4388                 }
4389
4390                 if (!arg_quiet) {
4391                         for (i = 0; i < n_changes; i++) {
4392                                 if (changes[i].type == UNIT_FILE_SYMLINK)
4393                                         log_info("ln -s '%s' '%s'", changes[i].source, changes[i].path);
4394                                 else
4395                                         log_info("rm '%s'", changes[i].path);
4396                         }
4397                 }
4398
4399                 r = 0;
4400         } else {
4401                 const char *method;
4402                 bool send_force = true, expect_carries_install_info = false;
4403                 dbus_bool_t a, b;
4404                 DBusMessageIter iter, sub, sub2;
4405
4406                 if (streq(verb, "enable")) {
4407                         method = "EnableUnitFiles";
4408                         expect_carries_install_info = true;
4409                 } else if (streq(verb, "disable")) {
4410                         method = "DisableUnitFiles";
4411                         send_force = false;
4412                 } else if (streq(verb, "reenable")) {
4413                         method = "ReenableUnitFiles";
4414                         expect_carries_install_info = true;
4415                 } else if (streq(verb, "link"))
4416                         method = "LinkUnitFiles";
4417                 else if (streq(verb, "preset")) {
4418                         method = "PresetUnitFiles";
4419                         expect_carries_install_info = true;
4420                 } else if (streq(verb, "mask"))
4421                         method = "MaskUnitFiles";
4422                 else if (streq(verb, "unmask")) {
4423                         method = "UnmaskUnitFiles";
4424                         send_force = false;
4425                 } else if (streq(verb, "set-default")) {
4426                         method = "SetDefaultTarget";
4427                 } else
4428                         assert_not_reached("Unknown verb");
4429
4430                 m = dbus_message_new_method_call(
4431                                 "org.freedesktop.systemd1",
4432                                 "/org/freedesktop/systemd1",
4433                                 "org.freedesktop.systemd1.Manager",
4434                                 method);
4435                 if (!m) {
4436                         r = log_oom();
4437                         goto finish;
4438                 }
4439
4440                 dbus_message_iter_init_append(m, &iter);
4441
4442                 r = bus_append_strv_iter(&iter, mangled_names);
4443                 if (r < 0) {
4444                         log_error("Failed to append unit files.");
4445                         goto finish;
4446                 }
4447
4448                 a = arg_runtime;
4449                 if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &a)) {
4450                         log_error("Failed to append runtime boolean.");
4451                         r = -ENOMEM;
4452                         goto finish;
4453                 }
4454
4455                 if (send_force) {
4456                         b = arg_force;
4457
4458                         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b)) {
4459                                 log_error("Failed to append force boolean.");
4460                                 r = -ENOMEM;
4461                                 goto finish;
4462                         }
4463                 }
4464
4465                 reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
4466                 if (!reply) {
4467                         log_error("Failed to issue method call: %s", bus_error_message(&error));
4468                         r = -EIO;
4469                         goto finish;
4470                 }
4471
4472                 if (!dbus_message_iter_init(reply, &iter)) {
4473                         log_error("Failed to initialize iterator.");
4474                         goto finish;
4475                 }
4476
4477                 if (expect_carries_install_info) {
4478                         r = bus_iter_get_basic_and_next(&iter, DBUS_TYPE_BOOLEAN, &b, true);
4479                         if (r < 0) {
4480                                 log_error("Failed to parse reply.");
4481                                 goto finish;
4482                         }
4483
4484                         carries_install_info = b;
4485                 }
4486
4487                 if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
4488                     dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
4489                         log_error("Failed to parse reply.");
4490                         r = -EIO;
4491                         goto finish;
4492                 }
4493
4494                 dbus_message_iter_recurse(&iter, &sub);
4495                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
4496                         const char *type, *path, *source;
4497
4498                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
4499                                 log_error("Failed to parse reply.");
4500                                 r = -EIO;
4501                                 goto finish;
4502                         }
4503
4504                         dbus_message_iter_recurse(&sub, &sub2);
4505
4506                         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
4507                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0 ||
4508                             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &source, false) < 0) {
4509                                 log_error("Failed to parse reply.");
4510                                 r = -EIO;
4511                                 goto finish;
4512                         }
4513
4514                         if (!arg_quiet) {
4515                                 if (streq(type, "symlink"))
4516                                         log_info("ln -s '%s' '%s'", source, path);
4517                                 else
4518                                         log_info("rm '%s'", path);
4519                         }
4520
4521                         dbus_message_iter_next(&sub);
4522                 }
4523
4524                 /* Try to reload if enabeld */
4525                 if (!arg_no_reload)
4526                         r = daemon_reload(bus, args);
4527         }
4528
4529         if (carries_install_info == 0)
4530                 log_warning("The unit files have no [Install] section. They are not meant to be enabled\n"
4531                             "using systemctl.\n"
4532                             "Possible reasons for having this kind of units are:\n"
4533                             "1) A unit may be statically enabled by being symlinked from another unit's\n"
4534                             "   .wants/ or .requires/ directory.\n"
4535                             "2) A unit's purpose may be to act as a helper for some other unit which has\n"
4536                             "   a requirement dependency on it.\n"
4537                             "3) A unit may be started when needed via activation (socket, path, timer,\n"
4538                             "   D-Bus, udev, scripted systemctl call, ...).\n");
4539
4540 finish:
4541         unit_file_changes_free(changes, n_changes);
4542
4543         return r;
4544 }
4545
4546 static int unit_is_enabled(DBusConnection *bus, char **args) {
4547         _cleanup_dbus_error_free_ DBusError error;
4548         int r;
4549         _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
4550         bool enabled;
4551         char **name;
4552         char *n;
4553
4554         dbus_error_init(&error);
4555
4556         r = enable_sysv_units(args);
4557         if (r < 0)
4558                 return r;
4559
4560         enabled = r > 0;
4561
4562         if (!bus || avoid_bus()) {
4563
4564                 STRV_FOREACH(name, args+1) {
4565                         UnitFileState state;
4566
4567                         n = unit_name_mangle(*name);
4568                         if (!n)
4569                                 return log_oom();
4570
4571                         state = unit_file_get_state(arg_scope, arg_root, n);
4572
4573                         free(n);
4574
4575                         if (state < 0)
4576                                 return state;
4577
4578                         if (state == UNIT_FILE_ENABLED ||
4579                             state == UNIT_FILE_ENABLED_RUNTIME ||
4580                             state == UNIT_FILE_STATIC)
4581                                 enabled = true;
4582
4583                         if (!arg_quiet)
4584                                 puts(unit_file_state_to_string(state));
4585                 }
4586
4587         } else {
4588                 STRV_FOREACH(name, args+1) {
4589                         const char *s;
4590
4591                         n = unit_name_mangle(*name);
4592                         if (!n)
4593                                 return log_oom();
4594
4595                         r = bus_method_call_with_reply (
4596                                         bus,
4597                                         "org.freedesktop.systemd1",
4598                                         "/org/freedesktop/systemd1",
4599                                         "org.freedesktop.systemd1.Manager",
4600                                         "GetUnitFileState",
4601                                         &reply,
4602                                         NULL,
4603                                         DBUS_TYPE_STRING, &n,
4604                                         DBUS_TYPE_INVALID);
4605
4606                         free(n);
4607
4608                         if (r)
4609                                 return r;
4610
4611                         if (!dbus_message_get_args(reply, &error,
4612                                                    DBUS_TYPE_STRING, &s,
4613                                                    DBUS_TYPE_INVALID)) {
4614                                 log_error("Failed to parse reply: %s", bus_error_message(&error));
4615                                 return -EIO;
4616                         }
4617
4618                         dbus_message_unref(reply);
4619                         reply = NULL;
4620
4621                         if (streq(s, "enabled") ||
4622                             streq(s, "enabled-runtime") ||
4623                             streq(s, "static"))
4624                                 enabled = true;
4625
4626                         if (!arg_quiet)
4627                                 puts(s);
4628                 }
4629         }
4630
4631         return enabled ? 0 : 1;
4632 }
4633
4634 static int systemctl_help(void) {
4635
4636         pager_open_if_enabled();
4637
4638         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
4639                "Query or send control commands to the systemd manager.\n\n"
4640                "  -h --help           Show this help\n"
4641                "     --version        Show package version\n"
4642                "  -t --type=TYPE      List only units of a particular type\n"
4643                "     --state=STATE    List only units with particular LOAD or SUB or ACTIVE state\n"
4644                "  -p --property=NAME  Show only properties by this name\n"
4645                "  -a --all            Show all loaded units/properties, including dead/empty\n"
4646                "                      ones. To list all units installed on the system, use\n"
4647                "                      the 'list-unit-files' command instead.\n"
4648                "     --reverse        Show reverse dependencies with 'list-dependencies'\n"
4649                "  -l --full           Don't ellipsize unit names on output\n"
4650                "     --fail           When queueing a new job, fail if conflicting jobs are\n"
4651                "                      pending\n"
4652                "     --irreversible   When queueing a new job, make sure it cannot be implicitly\n"
4653                "                      cancelled\n"
4654                "     --ignore-dependencies\n"
4655                "                      When queueing a new job, ignore all its dependencies\n"
4656                "     --show-types     When showing sockets, explicitly show their type\n"
4657                "  -i --ignore-inhibitors\n"
4658                "                      When shutting down or sleeping, ignore inhibitors\n"
4659                "     --kill-who=WHO   Who to send signal to\n"
4660                "  -s --signal=SIGNAL  Which signal to send\n"
4661                "  -H --host=[USER@]HOST\n"
4662                "                      Show information for remote host\n"
4663                "  -P --privileged     Acquire privileges before execution\n"
4664                "  -q --quiet          Suppress output\n"
4665                "     --no-block       Do not wait until operation finished\n"
4666                "     --no-wall        Don't send wall message before halt/power-off/reboot\n"
4667                "     --no-reload      When enabling/disabling unit files, don't reload daemon\n"
4668                "                      configuration\n"
4669                "     --no-legend      Do not print a legend (column headers and hints)\n"
4670                "     --no-pager       Do not pipe output into a pager\n"
4671                "     --no-ask-password\n"
4672                "                      Do not ask for system passwords\n"
4673                "     --system         Connect to system manager\n"
4674                "     --user           Connect to user service manager\n"
4675                "     --global         Enable/disable unit files globally\n"
4676                "     --runtime        Enable unit files only temporarily until next reboot\n"
4677                "  -f --force          When enabling unit files, override existing symlinks\n"
4678                "                      When shutting down, execute action immediately\n"
4679                "     --root=PATH      Enable unit files in the specified root directory\n"
4680                "  -n --lines=INTEGER  Numer of journal entries to show\n"
4681                "  -o --output=STRING  Change journal output mode (short, short-monotonic,\n"
4682                "                      verbose, export, json, json-pretty, json-sse, cat)\n\n"
4683                "Unit Commands:\n"
4684                "  list-units                      List loaded units\n"
4685                "  list-sockets                    List loaded sockets ordered by address\n"
4686                "  start [NAME...]                 Start (activate) one or more units\n"
4687                "  stop [NAME...]                  Stop (deactivate) one or more units\n"
4688                "  reload [NAME...]                Reload one or more units\n"
4689                "  restart [NAME...]               Start or restart one or more units\n"
4690                "  try-restart [NAME...]           Restart one or more units if active\n"
4691                "  reload-or-restart [NAME...]     Reload one or more units if possible,\n"
4692                "                                  otherwise start or restart\n"
4693                "  reload-or-try-restart [NAME...] Reload one or more units if possible,\n"
4694                "                                  otherwise restart if active\n"
4695                "  isolate [NAME]                  Start one unit and stop all others\n"
4696                "  kill [NAME...]                  Send signal to processes of a unit\n"
4697                "  is-active [NAME...]             Check whether units are active\n"
4698                "  is-failed [NAME...]             Check whether units are failed\n"
4699                "  status [NAME...|PID...]         Show runtime status of one or more units\n"
4700                "  show [NAME...|JOB...]           Show properties of one or more\n"
4701                "                                  units/jobs or the manager\n"
4702                "  set-property [NAME] [ASSIGNMENT...]\n"
4703                "                                  Sets one or more properties of a unit\n"
4704                "  help [NAME...|PID...]           Show manual for one or more units\n"
4705                "  reset-failed [NAME...]          Reset failed state for all, one, or more\n"
4706                "                                  units\n"
4707                "  list-dependencies [NAME]        Recursively show units which are required\n"
4708                "                                  or wanted by this unit or by which this\n"
4709                "                                  unit is required or wanted\n\n"
4710                "Unit File Commands:\n"
4711                "  list-unit-files                 List installed unit files\n"
4712                "  enable [NAME...]                Enable one or more unit files\n"
4713                "  disable [NAME...]               Disable one or more unit files\n"
4714                "  reenable [NAME...]              Reenable one or more unit files\n"
4715                "  preset [NAME...]                Enable/disable one or more unit files\n"
4716                "                                  based on preset configuration\n"
4717                "  is-enabled [NAME...]            Check whether unit files are enabled\n\n"
4718                "  mask [NAME...]                  Mask one or more units\n"
4719                "  unmask [NAME...]                Unmask one or more units\n"
4720                "  link [PATH...]                  Link one or more units files into\n"
4721                "                                  the search path\n"
4722                "  get-default                     Get the name of the default target\n"
4723                "  set-default NAME                Set the default target\n\n"
4724                "Job Commands:\n"
4725                "  list-jobs                       List jobs\n"
4726                "  cancel [JOB...]                 Cancel all, one, or more jobs\n\n"
4727                "Snapshot Commands:\n"
4728                "  snapshot [NAME]                 Create a snapshot\n"
4729                "  delete [NAME...]                Remove one or more snapshots\n\n"
4730                "Environment Commands:\n"
4731                "  show-environment                Dump environment\n"
4732                "  set-environment [NAME=VALUE...] Set one or more environment variables\n"
4733                "  unset-environment [NAME...]     Unset one or more environment variables\n\n"
4734                "Manager Lifecycle Commands:\n"
4735                "  daemon-reload                   Reload systemd manager configuration\n"
4736                "  daemon-reexec                   Reexecute systemd manager\n\n"
4737                "System Commands:\n"
4738                "  default                         Enter system default mode\n"
4739                "  rescue                          Enter system rescue mode\n"
4740                "  emergency                       Enter system emergency mode\n"
4741                "  halt                            Shut down and halt the system\n"
4742                "  poweroff                        Shut down and power-off the system\n"
4743                "  reboot                          Shut down and reboot the system\n"
4744                "  kexec                           Shut down and reboot the system with kexec\n"
4745                "  exit                            Request user instance exit\n"
4746                "  switch-root [ROOT] [INIT]       Change to a different root file system\n"
4747                "  suspend                         Suspend the system\n"
4748                "  hibernate                       Hibernate the system\n"
4749                "  hybrid-sleep                    Hibernate and suspend the system\n",
4750                program_invocation_short_name);
4751
4752         return 0;
4753 }
4754
4755 static int halt_help(void) {
4756
4757         printf("%s [OPTIONS...]\n\n"
4758                "%s the system.\n\n"
4759                "     --help      Show this help\n"
4760                "     --halt      Halt the machine\n"
4761                "  -p --poweroff  Switch off the machine\n"
4762                "     --reboot    Reboot the machine\n"
4763                "  -f --force     Force immediate halt/power-off/reboot\n"
4764                "  -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record\n"
4765                "  -d --no-wtmp   Don't write wtmp record\n"
4766                "     --no-wall   Don't send wall message before halt/power-off/reboot\n",
4767                program_invocation_short_name,
4768                arg_action == ACTION_REBOOT   ? "Reboot" :
4769                arg_action == ACTION_POWEROFF ? "Power off" :
4770                                                "Halt");
4771
4772         return 0;
4773 }
4774
4775 static int shutdown_help(void) {
4776
4777         printf("%s [OPTIONS...] [TIME] [WALL...]\n\n"
4778                "Shut down the system.\n\n"
4779                "     --help      Show this help\n"
4780                "  -H --halt      Halt the machine\n"
4781                "  -P --poweroff  Power-off the machine\n"
4782                "  -r --reboot    Reboot the machine\n"
4783                "  -h             Equivalent to --poweroff, overridden by --halt\n"
4784                "  -k             Don't halt/power-off/reboot, just send warnings\n"
4785                "     --no-wall   Don't send wall message before halt/power-off/reboot\n"
4786                "  -c             Cancel a pending shutdown\n",
4787                program_invocation_short_name);
4788
4789         return 0;
4790 }
4791
4792 static int telinit_help(void) {
4793
4794         printf("%s [OPTIONS...] {COMMAND}\n\n"
4795                "Send control commands to the init daemon.\n\n"
4796                "     --help      Show this help\n"
4797                "     --no-wall   Don't send wall message before halt/power-off/reboot\n\n"
4798                "Commands:\n"
4799                "  0              Power-off the machine\n"
4800                "  6              Reboot the machine\n"
4801                "  2, 3, 4, 5     Start runlevelX.target unit\n"
4802                "  1, s, S        Enter rescue mode\n"
4803                "  q, Q           Reload init daemon configuration\n"
4804                "  u, U           Reexecute init daemon\n",
4805                program_invocation_short_name);
4806
4807         return 0;
4808 }
4809
4810 static int runlevel_help(void) {
4811
4812         printf("%s [OPTIONS...]\n\n"
4813                "Prints the previous and current runlevel of the init system.\n\n"
4814                "     --help      Show this help\n",
4815                program_invocation_short_name);
4816
4817         return 0;
4818 }
4819
4820 static int help_types(void) {
4821         int i;
4822         const char *t;
4823
4824         puts("Available unit types:");
4825         for(i = 0; i < _UNIT_TYPE_MAX; i++) {
4826                 t = unit_type_to_string(i);
4827                 if (t)
4828                         puts(t);
4829         }
4830
4831         return 0;
4832 }
4833
4834 static int systemctl_parse_argv(int argc, char *argv[]) {
4835
4836         enum {
4837                 ARG_FAIL = 0x100,
4838                 ARG_REVERSE,
4839                 ARG_AFTER,
4840                 ARG_BEFORE,
4841                 ARG_SHOW_TYPES,
4842                 ARG_IRREVERSIBLE,
4843                 ARG_IGNORE_DEPENDENCIES,
4844                 ARG_VERSION,
4845                 ARG_USER,
4846                 ARG_SYSTEM,
4847                 ARG_GLOBAL,
4848                 ARG_NO_BLOCK,
4849                 ARG_NO_LEGEND,
4850                 ARG_NO_PAGER,
4851                 ARG_NO_WALL,
4852                 ARG_ROOT,
4853                 ARG_NO_RELOAD,
4854                 ARG_KILL_WHO,
4855                 ARG_NO_ASK_PASSWORD,
4856                 ARG_FAILED,
4857                 ARG_RUNTIME,
4858                 ARG_FORCE,
4859                 ARG_PLAIN,
4860                 ARG_STATE
4861         };
4862
4863         static const struct option options[] = {
4864                 { "help",                no_argument,       NULL, 'h'                     },
4865                 { "version",             no_argument,       NULL, ARG_VERSION             },
4866                 { "type",                required_argument, NULL, 't'                     },
4867                 { "property",            required_argument, NULL, 'p'                     },
4868                 { "all",                 no_argument,       NULL, 'a'                     },
4869                 { "reverse",             no_argument,       NULL, ARG_REVERSE             },
4870                 { "after",               no_argument,       NULL, ARG_AFTER               },
4871                 { "before",              no_argument,       NULL, ARG_BEFORE              },
4872                 { "show-types",          no_argument,       NULL, ARG_SHOW_TYPES          },
4873                 { "failed",              no_argument,       NULL, ARG_FAILED              }, /* compatibility only */
4874                 { "full",                no_argument,       NULL, 'l'                     },
4875                 { "fail",                no_argument,       NULL, ARG_FAIL                },
4876                 { "irreversible",        no_argument,       NULL, ARG_IRREVERSIBLE        },
4877                 { "ignore-dependencies", no_argument,       NULL, ARG_IGNORE_DEPENDENCIES },
4878                 { "ignore-inhibitors",   no_argument,       NULL, 'i'                     },
4879                 { "user",                no_argument,       NULL, ARG_USER                },
4880                 { "system",              no_argument,       NULL, ARG_SYSTEM              },
4881                 { "global",              no_argument,       NULL, ARG_GLOBAL              },
4882                 { "no-block",            no_argument,       NULL, ARG_NO_BLOCK            },
4883                 { "no-legend",           no_argument,       NULL, ARG_NO_LEGEND           },
4884                 { "no-pager",            no_argument,       NULL, ARG_NO_PAGER            },
4885                 { "no-wall",             no_argument,       NULL, ARG_NO_WALL             },
4886                 { "quiet",               no_argument,       NULL, 'q'                     },
4887                 { "root",                required_argument, NULL, ARG_ROOT                },
4888                 { "force",               no_argument,       NULL, ARG_FORCE               },
4889                 { "no-reload",           no_argument,       NULL, ARG_NO_RELOAD           },
4890                 { "kill-who",            required_argument, NULL, ARG_KILL_WHO            },
4891                 { "signal",              required_argument, NULL, 's'                     },
4892                 { "no-ask-password",     no_argument,       NULL, ARG_NO_ASK_PASSWORD     },
4893                 { "host",                required_argument, NULL, 'H'                     },
4894                 { "privileged",          no_argument,       NULL, 'P'                     },
4895                 { "runtime",             no_argument,       NULL, ARG_RUNTIME             },
4896                 { "lines",               required_argument, NULL, 'n'                     },
4897                 { "output",              required_argument, NULL, 'o'                     },
4898                 { "plain",               no_argument,       NULL, ARG_PLAIN               },
4899                 { "state",               required_argument, NULL, ARG_STATE               },
4900                 { NULL,                  0,                 NULL, 0                       }
4901         };
4902
4903         int c;
4904
4905         assert(argc >= 0);
4906         assert(argv);
4907
4908         while ((c = getopt_long(argc, argv, "ht:p:alqfs:H:Pn:o:i", options, NULL)) >= 0) {
4909
4910                 switch (c) {
4911
4912                 case 'h':
4913                         systemctl_help();
4914                         return 0;
4915
4916                 case ARG_VERSION:
4917                         puts(PACKAGE_STRING);
4918                         puts(SYSTEMD_FEATURES);
4919                         return 0;
4920
4921                 case 't': {
4922                         char *word, *state;
4923                         size_t size;
4924
4925                         FOREACH_WORD_SEPARATOR(word, size, optarg, ",", state) {
4926                                 _cleanup_free_ char *type;
4927
4928                                 type = strndup(word, size);
4929                                 if (!type)
4930                                         return -ENOMEM;
4931
4932                                 if (streq(type, "help")) {
4933                                         help_types();
4934                                         return 0;
4935                                 }
4936
4937                                 if (unit_type_from_string(type) >= 0) {
4938                                         if (strv_push(&arg_types, type))
4939                                                 return log_oom();
4940                                         type = NULL;
4941                                         continue;
4942                                 }
4943
4944                                 /* It's much nicer to use --state= for
4945                                  * load states, but let's support this
4946                                  * in --types= too for compatibility
4947                                  * with old versions */
4948                                 if (unit_load_state_from_string(optarg) >= 0) {
4949                                         if (strv_push(&arg_states, type) < 0)
4950                                                 return log_oom();
4951                                         type = NULL;
4952                                         continue;
4953                                 }
4954
4955                                 log_error("Unknown unit type or load state '%s'.", type);
4956                                 log_info("Use -t help to see a list of allowed values.");
4957                                 return -EINVAL;
4958                         }
4959
4960                         break;
4961                 }
4962
4963                 case 'p': {
4964                         /* Make sure that if the empty property list
4965                            was specified, we won't show any properties. */
4966                         if (isempty(optarg) && !arg_properties) {
4967                                 arg_properties = strv_new(NULL, NULL);
4968                                 if (!arg_properties)
4969                                         return log_oom();
4970                         } else {
4971                                 char *word, *state;
4972                                 size_t size;
4973
4974                                 FOREACH_WORD_SEPARATOR(word, size, optarg, ",", state) {
4975                                         char *prop;
4976
4977                                         prop = strndup(word, size);
4978                                         if (!prop)
4979                                                 return log_oom();
4980
4981                                         if (strv_push(&arg_properties, prop) < 0) {
4982                                                 free(prop);
4983                                                 return log_oom();
4984                                         }
4985                                 }
4986                         }
4987
4988                         /* If the user asked for a particular
4989                          * property, show it to him, even if it is
4990                          * empty. */
4991                         arg_all = true;
4992
4993                         break;
4994                 }
4995
4996                 case 'a':
4997                         arg_all = true;
4998                         break;
4999
5000                 case ARG_REVERSE:
5001                         arg_dependency = DEPENDENCY_REVERSE;
5002                         break;
5003
5004                 case ARG_AFTER:
5005                         arg_dependency = DEPENDENCY_AFTER;
5006                         break;
5007
5008                 case ARG_BEFORE:
5009                         arg_dependency = DEPENDENCY_BEFORE;
5010                         break;
5011
5012                 case ARG_SHOW_TYPES:
5013                         arg_show_types = true;
5014                         break;
5015
5016                 case ARG_FAIL:
5017                         arg_job_mode = "fail";
5018                         break;
5019
5020                 case ARG_IRREVERSIBLE:
5021                         arg_job_mode = "replace-irreversibly";
5022                         break;
5023
5024                 case ARG_IGNORE_DEPENDENCIES:
5025                         arg_job_mode = "ignore-dependencies";
5026                         break;
5027
5028                 case ARG_USER:
5029                         arg_scope = UNIT_FILE_USER;
5030                         break;
5031
5032                 case ARG_SYSTEM:
5033                         arg_scope = UNIT_FILE_SYSTEM;
5034                         break;
5035
5036                 case ARG_GLOBAL:
5037                         arg_scope = UNIT_FILE_GLOBAL;
5038                         break;
5039
5040                 case ARG_NO_BLOCK:
5041                         arg_no_block = true;
5042                         break;
5043
5044                 case ARG_NO_LEGEND:
5045                         arg_no_legend = true;
5046                         break;
5047
5048                 case ARG_NO_PAGER:
5049                         arg_no_pager = true;
5050                         break;
5051
5052                 case ARG_NO_WALL:
5053                         arg_no_wall = true;
5054                         break;
5055
5056                 case ARG_ROOT:
5057                         arg_root = optarg;
5058                         break;
5059
5060                 case 'l':
5061                         arg_full = true;
5062                         break;
5063
5064                 case ARG_FAILED:
5065                         if (strv_extend(&arg_states, "failed") < 0)
5066                                 return log_oom();
5067
5068                         break;
5069
5070                 case 'q':
5071                         arg_quiet = true;
5072                         break;
5073
5074                 case ARG_FORCE:
5075                         arg_force ++;
5076                         break;
5077
5078                 case 'f':
5079                         arg_force ++;
5080                         break;
5081
5082                 case ARG_NO_RELOAD:
5083                         arg_no_reload = true;
5084                         break;
5085
5086                 case ARG_KILL_WHO:
5087                         arg_kill_who = optarg;
5088                         break;
5089
5090                 case 's':
5091                         if ((arg_signal = signal_from_string_try_harder(optarg)) < 0) {
5092                                 log_error("Failed to parse signal string %s.", optarg);
5093                                 return -EINVAL;
5094                         }
5095                         break;
5096
5097                 case ARG_NO_ASK_PASSWORD:
5098                         arg_ask_password = false;
5099                         break;
5100
5101                 case 'P':
5102                         arg_transport = TRANSPORT_POLKIT;
5103                         break;
5104
5105                 case 'H':
5106                         arg_transport = TRANSPORT_SSH;
5107                         parse_user_at_host(optarg, &arg_user, &arg_host);
5108                         break;
5109
5110                 case ARG_RUNTIME:
5111                         arg_runtime = true;
5112                         break;
5113
5114                 case 'n':
5115                         if (safe_atou(optarg, &arg_lines) < 0) {
5116                                 log_error("Failed to parse lines '%s'", optarg);
5117                                 return -EINVAL;
5118                         }
5119                         break;
5120
5121                 case 'o':
5122                         arg_output = output_mode_from_string(optarg);
5123                         if (arg_output < 0) {
5124                                 log_error("Unknown output '%s'.", optarg);
5125                                 return -EINVAL;
5126                         }
5127                         break;
5128
5129                 case 'i':
5130                         arg_ignore_inhibitors = true;
5131                         break;
5132
5133                 case ARG_PLAIN:
5134                         arg_plain = true;
5135                         break;
5136
5137                 case ARG_STATE: {
5138                         char *word, *state;
5139                         size_t size;
5140
5141                         FOREACH_WORD_SEPARATOR(word, size, optarg, ",", state) {
5142                                 char *s;
5143
5144                                 s = strndup(word, size);
5145                                 if (!s)
5146                                         return log_oom();
5147
5148                                 if (strv_push(&arg_states, s) < 0) {
5149                                         free(s);
5150                                         return log_oom();
5151                                 }
5152                         }
5153                         break;
5154                 }
5155
5156                 case '?':
5157                         return -EINVAL;
5158
5159                 default:
5160                         log_error("Unknown option code '%c'.", c);
5161                         return -EINVAL;
5162                 }
5163         }
5164
5165         if (arg_transport != TRANSPORT_NORMAL && arg_scope != UNIT_FILE_SYSTEM) {
5166                 log_error("Cannot access user instance remotely.");
5167                 return -EINVAL;
5168         }
5169
5170         return 1;
5171 }
5172
5173 static int halt_parse_argv(int argc, char *argv[]) {
5174
5175         enum {
5176                 ARG_HELP = 0x100,
5177                 ARG_HALT,
5178                 ARG_REBOOT,
5179                 ARG_NO_WALL
5180         };
5181
5182         static const struct option options[] = {
5183                 { "help",      no_argument,       NULL, ARG_HELP    },
5184                 { "halt",      no_argument,       NULL, ARG_HALT    },
5185                 { "poweroff",  no_argument,       NULL, 'p'         },
5186                 { "reboot",    no_argument,       NULL, ARG_REBOOT  },
5187                 { "force",     no_argument,       NULL, 'f'         },
5188                 { "wtmp-only", no_argument,       NULL, 'w'         },
5189                 { "no-wtmp",   no_argument,       NULL, 'd'         },
5190                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
5191                 { NULL,        0,                 NULL, 0           }
5192         };
5193
5194         int c, runlevel;
5195
5196         assert(argc >= 0);
5197         assert(argv);
5198
5199         if (utmp_get_runlevel(&runlevel, NULL) >= 0)
5200                 if (runlevel == '0' || runlevel == '6')
5201                         arg_force = 2;
5202
5203         while ((c = getopt_long(argc, argv, "pfwdnih", options, NULL)) >= 0) {
5204                 switch (c) {
5205
5206                 case ARG_HELP:
5207                         halt_help();
5208                         return 0;
5209
5210                 case ARG_HALT:
5211                         arg_action = ACTION_HALT;
5212                         break;
5213
5214                 case 'p':
5215                         if (arg_action != ACTION_REBOOT)
5216                                 arg_action = ACTION_POWEROFF;
5217                         break;
5218
5219                 case ARG_REBOOT:
5220                         arg_action = ACTION_REBOOT;
5221                         break;
5222
5223                 case 'f':
5224                         arg_force = 2;
5225                         break;
5226
5227                 case 'w':
5228                         arg_dry = true;
5229                         break;
5230
5231                 case 'd':
5232                         arg_no_wtmp = true;
5233                         break;
5234
5235                 case ARG_NO_WALL:
5236                         arg_no_wall = true;
5237                         break;
5238
5239                 case 'i':
5240                 case 'h':
5241                 case 'n':
5242                         /* Compatibility nops */
5243                         break;
5244
5245                 case '?':
5246                         return -EINVAL;
5247
5248                 default:
5249                         log_error("Unknown option code '%c'.", c);
5250                         return -EINVAL;
5251                 }
5252         }
5253
5254         if (optind < argc) {
5255                 log_error("Too many arguments.");
5256                 return -EINVAL;
5257         }
5258
5259         return 1;
5260 }
5261
5262 static int parse_time_spec(const char *t, usec_t *_u) {
5263         assert(t);
5264         assert(_u);
5265
5266         if (streq(t, "now"))
5267                 *_u = 0;
5268         else if (!strchr(t, ':')) {
5269                 uint64_t u;
5270
5271                 if (safe_atou64(t, &u) < 0)
5272                         return -EINVAL;
5273
5274                 *_u = now(CLOCK_REALTIME) + USEC_PER_MINUTE * u;
5275         } else {
5276                 char *e = NULL;
5277                 long hour, minute;
5278                 struct tm tm = {};
5279                 time_t s;
5280                 usec_t n;
5281
5282                 errno = 0;
5283                 hour = strtol(t, &e, 10);
5284                 if (errno > 0 || *e != ':' || hour < 0 || hour > 23)
5285                         return -EINVAL;
5286
5287                 minute = strtol(e+1, &e, 10);
5288                 if (errno > 0 || *e != 0 || minute < 0 || minute > 59)
5289                         return -EINVAL;
5290
5291                 n = now(CLOCK_REALTIME);
5292                 s = (time_t) (n / USEC_PER_SEC);
5293
5294                 assert_se(localtime_r(&s, &tm));
5295
5296                 tm.tm_hour = (int) hour;
5297                 tm.tm_min = (int) minute;
5298                 tm.tm_sec = 0;
5299
5300                 assert_se(s = mktime(&tm));
5301
5302                 *_u = (usec_t) s * USEC_PER_SEC;
5303
5304                 while (*_u <= n)
5305                         *_u += USEC_PER_DAY;
5306         }
5307
5308         return 0;
5309 }
5310
5311 static int shutdown_parse_argv(int argc, char *argv[]) {
5312
5313         enum {
5314                 ARG_HELP = 0x100,
5315                 ARG_NO_WALL
5316         };
5317
5318         static const struct option options[] = {
5319                 { "help",      no_argument,       NULL, ARG_HELP    },
5320                 { "halt",      no_argument,       NULL, 'H'         },
5321                 { "poweroff",  no_argument,       NULL, 'P'         },
5322                 { "reboot",    no_argument,       NULL, 'r'         },
5323                 { "kexec",     no_argument,       NULL, 'K'         }, /* not documented extension */
5324                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
5325                 { NULL,        0,                 NULL, 0           }
5326         };
5327
5328         int c, r;
5329
5330         assert(argc >= 0);
5331         assert(argv);
5332
5333         while ((c = getopt_long(argc, argv, "HPrhkt:afFc", options, NULL)) >= 0) {
5334                 switch (c) {
5335
5336                 case ARG_HELP:
5337                         shutdown_help();
5338                         return 0;
5339
5340                 case 'H':
5341                         arg_action = ACTION_HALT;
5342                         break;
5343
5344                 case 'P':
5345                         arg_action = ACTION_POWEROFF;
5346                         break;
5347
5348                 case 'r':
5349                         if (kexec_loaded())
5350                                 arg_action = ACTION_KEXEC;
5351                         else
5352                                 arg_action = ACTION_REBOOT;
5353                         break;
5354
5355                 case 'K':
5356                         arg_action = ACTION_KEXEC;
5357                         break;
5358
5359                 case 'h':
5360                         if (arg_action != ACTION_HALT)
5361                                 arg_action = ACTION_POWEROFF;
5362                         break;
5363
5364                 case 'k':
5365                         arg_dry = true;
5366                         break;
5367
5368                 case ARG_NO_WALL:
5369                         arg_no_wall = true;
5370                         break;
5371
5372                 case 't':
5373                 case 'a':
5374                         /* Compatibility nops */
5375                         break;
5376
5377                 case 'c':
5378                         arg_action = ACTION_CANCEL_SHUTDOWN;
5379                         break;
5380
5381                 case '?':
5382                         return -EINVAL;
5383
5384                 default:
5385                         log_error("Unknown option code '%c'.", c);
5386                         return -EINVAL;
5387                 }
5388         }
5389
5390         if (argc > optind && arg_action != ACTION_CANCEL_SHUTDOWN) {
5391                 r = parse_time_spec(argv[optind], &arg_when);
5392                 if (r < 0) {
5393                         log_error("Failed to parse time specification: %s", argv[optind]);
5394                         return r;
5395                 }
5396         } else
5397                 arg_when = now(CLOCK_REALTIME) + USEC_PER_MINUTE;
5398
5399         if (argc > optind && arg_action == ACTION_CANCEL_SHUTDOWN)
5400                 /* No time argument for shutdown cancel */
5401                 arg_wall = argv + optind;
5402         else if (argc > optind + 1)
5403                 /* We skip the time argument */
5404                 arg_wall = argv + optind + 1;
5405
5406         optind = argc;
5407
5408         return 1;
5409 }
5410
5411 static int telinit_parse_argv(int argc, char *argv[]) {
5412
5413         enum {
5414                 ARG_HELP = 0x100,
5415                 ARG_NO_WALL
5416         };
5417
5418         static const struct option options[] = {
5419                 { "help",      no_argument,       NULL, ARG_HELP    },
5420                 { "no-wall",   no_argument,       NULL, ARG_NO_WALL },
5421                 { NULL,        0,                 NULL, 0           }
5422         };
5423
5424         static const struct {
5425                 char from;
5426                 enum action to;
5427         } table[] = {
5428                 { '0', ACTION_POWEROFF },
5429                 { '6', ACTION_REBOOT },
5430                 { '1', ACTION_RESCUE },
5431                 { '2', ACTION_RUNLEVEL2 },
5432                 { '3', ACTION_RUNLEVEL3 },
5433                 { '4', ACTION_RUNLEVEL4 },
5434                 { '5', ACTION_RUNLEVEL5 },
5435                 { 's', ACTION_RESCUE },
5436                 { 'S', ACTION_RESCUE },
5437                 { 'q', ACTION_RELOAD },
5438                 { 'Q', ACTION_RELOAD },
5439                 { 'u', ACTION_REEXEC },
5440                 { 'U', ACTION_REEXEC }
5441         };
5442
5443         unsigned i;
5444         int c;
5445
5446         assert(argc >= 0);
5447         assert(argv);
5448
5449         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
5450                 switch (c) {
5451
5452                 case ARG_HELP:
5453                         telinit_help();
5454                         return 0;
5455
5456                 case ARG_NO_WALL:
5457                         arg_no_wall = true;
5458                         break;
5459
5460                 case '?':
5461                         return -EINVAL;
5462
5463                 default:
5464                         log_error("Unknown option code '%c'.", c);
5465                         return -EINVAL;
5466                 }
5467         }
5468
5469         if (optind >= argc) {
5470                 telinit_help();
5471                 return -EINVAL;
5472         }
5473
5474         if (optind + 1 < argc) {
5475                 log_error("Too many arguments.");
5476                 return -EINVAL;
5477         }
5478
5479         if (strlen(argv[optind]) != 1) {
5480                 log_error("Expected single character argument.");
5481                 return -EINVAL;
5482         }
5483
5484         for (i = 0; i < ELEMENTSOF(table); i++)
5485                 if (table[i].from == argv[optind][0])
5486                         break;
5487
5488         if (i >= ELEMENTSOF(table)) {
5489                 log_error("Unknown command '%s'.", argv[optind]);
5490                 return -EINVAL;
5491         }
5492
5493         arg_action = table[i].to;
5494
5495         optind ++;
5496
5497         return 1;
5498 }
5499
5500 static int runlevel_parse_argv(int argc, char *argv[]) {
5501
5502         enum {
5503                 ARG_HELP = 0x100,
5504         };
5505
5506         static const struct option options[] = {
5507                 { "help",      no_argument,       NULL, ARG_HELP    },
5508                 { NULL,        0,                 NULL, 0           }
5509         };
5510
5511         int c;
5512
5513         assert(argc >= 0);
5514         assert(argv);
5515
5516         while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0) {
5517                 switch (c) {
5518
5519                 case ARG_HELP:
5520                         runlevel_help();
5521                         return 0;
5522
5523                 case '?':
5524                         return -EINVAL;
5525
5526                 default:
5527                         log_error("Unknown option code '%c'.", c);
5528                         return -EINVAL;
5529                 }
5530         }
5531
5532         if (optind < argc) {
5533                 log_error("Too many arguments.");
5534                 return -EINVAL;
5535         }
5536
5537         return 1;
5538 }
5539
5540 static int parse_argv(int argc, char *argv[]) {
5541         assert(argc >= 0);
5542         assert(argv);
5543
5544         if (program_invocation_short_name) {
5545
5546                 if (strstr(program_invocation_short_name, "halt")) {
5547                         arg_action = ACTION_HALT;
5548                         return halt_parse_argv(argc, argv);
5549                 } else if (strstr(program_invocation_short_name, "poweroff")) {
5550                         arg_action = ACTION_POWEROFF;
5551                         return halt_parse_argv(argc, argv);
5552                 } else if (strstr(program_invocation_short_name, "reboot")) {
5553                         if (kexec_loaded())
5554                                 arg_action = ACTION_KEXEC;
5555                         else
5556                                 arg_action = ACTION_REBOOT;
5557                         return halt_parse_argv(argc, argv);
5558                 } else if (strstr(program_invocation_short_name, "shutdown")) {
5559                         arg_action = ACTION_POWEROFF;
5560                         return shutdown_parse_argv(argc, argv);
5561                 } else if (strstr(program_invocation_short_name, "init")) {
5562
5563                         if (sd_booted() > 0) {
5564                                 arg_action = ACTION_INVALID;
5565                                 return telinit_parse_argv(argc, argv);
5566                         } else {
5567                                 /* Hmm, so some other init system is
5568                                  * running, we need to forward this
5569                                  * request to it. For now we simply
5570                                  * guess that it is Upstart. */
5571
5572                                 execv(TELINIT, argv);
5573
5574                                 log_error("Couldn't find an alternative telinit implementation to spawn.");
5575                                 return -EIO;
5576                         }
5577
5578                 } else if (strstr(program_invocation_short_name, "runlevel")) {
5579                         arg_action = ACTION_RUNLEVEL;
5580                         return runlevel_parse_argv(argc, argv);
5581                 }
5582         }
5583
5584         arg_action = ACTION_SYSTEMCTL;
5585         return systemctl_parse_argv(argc, argv);
5586 }
5587
5588 _pure_ static int action_to_runlevel(void) {
5589
5590         static const char table[_ACTION_MAX] = {
5591                 [ACTION_HALT] =      '0',
5592                 [ACTION_POWEROFF] =  '0',
5593                 [ACTION_REBOOT] =    '6',
5594                 [ACTION_RUNLEVEL2] = '2',
5595                 [ACTION_RUNLEVEL3] = '3',
5596                 [ACTION_RUNLEVEL4] = '4',
5597                 [ACTION_RUNLEVEL5] = '5',
5598                 [ACTION_RESCUE] =    '1'
5599         };
5600
5601         assert(arg_action < _ACTION_MAX);
5602
5603         return table[arg_action];
5604 }
5605
5606 static int talk_upstart(void) {
5607         _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
5608         _cleanup_dbus_error_free_ DBusError error;
5609         int previous, rl, r;
5610         char
5611                 env1_buf[] = "RUNLEVEL=X",
5612                 env2_buf[] = "PREVLEVEL=X";
5613         char *env1 = env1_buf, *env2 = env2_buf;
5614         const char *emit = "runlevel";
5615         dbus_bool_t b_false = FALSE;
5616         DBusMessageIter iter, sub;
5617         DBusConnection *bus;
5618
5619         dbus_error_init(&error);
5620
5621         if (!(rl = action_to_runlevel()))
5622                 return 0;
5623
5624         if (utmp_get_runlevel(&previous, NULL) < 0)
5625                 previous = 'N';
5626
5627         if (!(bus = dbus_connection_open_private("unix:abstract=/com/ubuntu/upstart", &error))) {
5628                 if (dbus_error_has_name(&error, DBUS_ERROR_NO_SERVER)) {
5629                         r = 0;
5630                         goto finish;
5631                 }
5632
5633                 log_error("Failed to connect to Upstart bus: %s", bus_error_message(&error));
5634                 r = -EIO;
5635                 goto finish;
5636         }
5637
5638         if ((r = bus_check_peercred(bus)) < 0) {
5639                 log_error("Failed to verify owner of bus.");
5640                 goto finish;
5641         }
5642
5643         if (!(m = dbus_message_new_method_call(
5644                               "com.ubuntu.Upstart",
5645                               "/com/ubuntu/Upstart",
5646                               "com.ubuntu.Upstart0_6",
5647                               "EmitEvent"))) {
5648
5649                 log_error("Could not allocate message.");
5650                 r = -ENOMEM;
5651                 goto finish;
5652         }
5653
5654         dbus_message_iter_init_append(m, &iter);
5655
5656         env1_buf[sizeof(env1_buf)-2] = rl;
5657         env2_buf[sizeof(env2_buf)-2] = previous;
5658
5659         if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &emit) ||
5660             !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub) ||
5661             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env1) ||
5662             !dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &env2) ||
5663             !dbus_message_iter_close_container(&iter, &sub) ||
5664             !dbus_message_iter_append_basic(&iter, DBUS_TYPE_BOOLEAN, &b_false)) {
5665                 log_error("Could not append arguments to message.");
5666                 r = -ENOMEM;
5667                 goto finish;
5668         }
5669
5670         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
5671
5672                 if (bus_error_is_no_service(&error)) {
5673                         r = -EADDRNOTAVAIL;
5674                         goto finish;
5675                 }
5676
5677                 log_error("Failed to issue method call: %s", bus_error_message(&error));
5678                 r = -EIO;
5679                 goto finish;
5680         }
5681
5682         r = 1;
5683
5684 finish:
5685         if (bus) {
5686                 dbus_connection_flush(bus);
5687                 dbus_connection_close(bus);
5688                 dbus_connection_unref(bus);
5689         }
5690
5691         return r;
5692 }
5693
5694 static int talk_initctl(void) {
5695         struct init_request request = {};
5696         int r;
5697         _cleanup_close_ int fd = -1;
5698         char rl;
5699
5700         rl = action_to_runlevel();
5701         if (!rl)
5702                 return 0;
5703
5704         request.magic = INIT_MAGIC;
5705         request.sleeptime = 0;
5706         request.cmd = INIT_CMD_RUNLVL;
5707         request.runlevel = rl;
5708
5709         fd = open(INIT_FIFO, O_WRONLY|O_NDELAY|O_CLOEXEC|O_NOCTTY);
5710         if (fd < 0) {
5711                 if (errno == ENOENT)
5712                         return 0;
5713
5714                 log_error("Failed to open "INIT_FIFO": %m");
5715                 return -errno;
5716         }
5717
5718         errno = 0;
5719         r = loop_write(fd, &request, sizeof(request), false) != sizeof(request);
5720         if (r) {
5721                 log_error("Failed to write to "INIT_FIFO": %m");
5722                 return errno > 0 ? -errno : -EIO;
5723         }
5724
5725         return 1;
5726 }
5727
5728 static int systemctl_main(DBusConnection *bus, int argc, char *argv[], DBusError *error) {
5729
5730         static const struct {
5731                 const char* verb;
5732                 const enum {
5733                         MORE,
5734                         LESS,
5735                         EQUAL
5736                 } argc_cmp;
5737                 const int argc;
5738                 int (* const dispatch)(DBusConnection *bus, char **args);
5739         } verbs[] = {
5740                 { "list-units",            LESS,  1, list_units        },
5741                 { "list-unit-files",       EQUAL, 1, list_unit_files   },
5742                 { "list-sockets",          LESS,  1, list_sockets      },
5743                 { "list-jobs",             EQUAL, 1, list_jobs         },
5744                 { "clear-jobs",            EQUAL, 1, daemon_reload     },
5745                 { "cancel",                MORE,  2, cancel_job        },
5746                 { "start",                 MORE,  2, start_unit        },
5747                 { "stop",                  MORE,  2, start_unit        },
5748                 { "condstop",              MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
5749                 { "reload",                MORE,  2, start_unit        },
5750                 { "restart",               MORE,  2, start_unit        },
5751                 { "try-restart",           MORE,  2, start_unit        },
5752                 { "reload-or-restart",     MORE,  2, start_unit        },
5753                 { "reload-or-try-restart", MORE,  2, start_unit        },
5754                 { "force-reload",          MORE,  2, start_unit        }, /* For compatibility with SysV */
5755                 { "condreload",            MORE,  2, start_unit        }, /* For compatibility with ALTLinux */
5756                 { "condrestart",           MORE,  2, start_unit        }, /* For compatibility with RH */
5757                 { "isolate",               EQUAL, 2, start_unit        },
5758                 { "kill",                  MORE,  2, kill_unit         },
5759                 { "is-active",             MORE,  2, check_unit_active },
5760                 { "check",                 MORE,  2, check_unit_active },
5761                 { "is-failed",             MORE,  2, check_unit_failed },
5762                 { "show",                  MORE,  1, show              },
5763                 { "status",                MORE,  1, show              },
5764                 { "help",                  MORE,  2, show              },
5765                 { "snapshot",              LESS,  2, snapshot          },
5766                 { "delete",                MORE,  2, delete_snapshot   },
5767                 { "daemon-reload",         EQUAL, 1, daemon_reload     },
5768                 { "daemon-reexec",         EQUAL, 1, daemon_reload     },
5769                 { "show-environment",      EQUAL, 1, show_enviroment   },
5770                 { "set-environment",       MORE,  2, set_environment   },
5771                 { "unset-environment",     MORE,  2, set_environment   },
5772                 { "halt",                  EQUAL, 1, start_special     },
5773                 { "poweroff",              EQUAL, 1, start_special     },
5774                 { "reboot",                EQUAL, 1, start_special     },
5775                 { "kexec",                 EQUAL, 1, start_special     },
5776                 { "suspend",               EQUAL, 1, start_special     },
5777                 { "hibernate",             EQUAL, 1, start_special     },
5778                 { "hybrid-sleep",          EQUAL, 1, start_special     },
5779                 { "default",               EQUAL, 1, start_special     },
5780                 { "rescue",                EQUAL, 1, start_special     },
5781                 { "emergency",             EQUAL, 1, start_special     },
5782                 { "exit",                  EQUAL, 1, start_special     },
5783                 { "reset-failed",          MORE,  1, reset_failed      },
5784                 { "enable",                MORE,  2, enable_unit       },
5785                 { "disable",               MORE,  2, enable_unit       },
5786                 { "is-enabled",            MORE,  2, unit_is_enabled   },
5787                 { "reenable",              MORE,  2, enable_unit       },
5788                 { "preset",                MORE,  2, enable_unit       },
5789                 { "mask",                  MORE,  2, enable_unit       },
5790                 { "unmask",                MORE,  2, enable_unit       },
5791                 { "link",                  MORE,  2, enable_unit       },
5792                 { "switch-root",           MORE,  2, switch_root       },
5793                 { "list-dependencies",     LESS,  2, list_dependencies },
5794                 { "set-default",           EQUAL, 2, enable_unit       },
5795                 { "get-default",           LESS,  1, get_default       },
5796                 { "set-property",          MORE,  3, set_property      },
5797         };
5798
5799         int left;
5800         unsigned i;
5801
5802         assert(argc >= 0);
5803         assert(argv);
5804         assert(error);
5805
5806         left = argc - optind;
5807
5808         if (left <= 0)
5809                 /* Special rule: no arguments means "list-units" */
5810                 i = 0;
5811         else {
5812                 if (streq(argv[optind], "help") && !argv[optind+1]) {
5813                         log_error("This command expects one or more "
5814                                   "unit names. Did you mean --help?");
5815                         return -EINVAL;
5816                 }
5817
5818                 for (i = 0; i < ELEMENTSOF(verbs); i++)
5819                         if (streq(argv[optind], verbs[i].verb))
5820                                 break;
5821
5822                 if (i >= ELEMENTSOF(verbs)) {
5823                         log_error("Unknown operation '%s'.", argv[optind]);
5824                         return -EINVAL;
5825                 }
5826         }
5827
5828         switch (verbs[i].argc_cmp) {
5829
5830         case EQUAL:
5831                 if (left != verbs[i].argc) {
5832                         log_error("Invalid number of arguments.");
5833                         return -EINVAL;
5834                 }
5835
5836                 break;
5837
5838         case MORE:
5839                 if (left < verbs[i].argc) {
5840                         log_error("Too few arguments.");
5841                         return -EINVAL;
5842                 }
5843
5844                 break;
5845
5846         case LESS:
5847                 if (left > verbs[i].argc) {
5848                         log_error("Too many arguments.");
5849                         return -EINVAL;
5850                 }
5851
5852                 break;
5853
5854         default:
5855                 assert_not_reached("Unknown comparison operator.");
5856         }
5857
5858         /* Require a bus connection for all operations but
5859          * enable/disable */
5860         if (!streq(verbs[i].verb, "enable") &&
5861             !streq(verbs[i].verb, "disable") &&
5862             !streq(verbs[i].verb, "is-enabled") &&
5863             !streq(verbs[i].verb, "list-unit-files") &&
5864             !streq(verbs[i].verb, "reenable") &&
5865             !streq(verbs[i].verb, "preset") &&
5866             !streq(verbs[i].verb, "mask") &&
5867             !streq(verbs[i].verb, "unmask") &&
5868             !streq(verbs[i].verb, "link") &&
5869             !streq(verbs[i].verb, "set-default") &&
5870             !streq(verbs[i].verb, "get-default")) {
5871
5872                 if (running_in_chroot() > 0) {
5873                         log_info("Running in chroot, ignoring request.");
5874                         return 0;
5875                 }
5876
5877                 if (((!streq(verbs[i].verb, "reboot") &&
5878                       !streq(verbs[i].verb, "halt") &&
5879                       !streq(verbs[i].verb, "poweroff")) || arg_force <= 0) && !bus) {
5880                         log_error("Failed to get D-Bus connection: %s",
5881                                   dbus_error_is_set(error) ? error->message : "No connection to service manager.");
5882                         return -EIO;
5883                 }
5884
5885         } else {
5886
5887                 if (!bus && !avoid_bus()) {
5888                         log_error("Failed to get D-Bus connection: %s",
5889                                   dbus_error_is_set(error) ? error->message : "No connection to service manager.");
5890                         return -EIO;
5891                 }
5892         }
5893
5894         return verbs[i].dispatch(bus, argv + optind);
5895 }
5896
5897 static int send_shutdownd(usec_t t, char mode, bool dry_run, bool warn, const char *message) {
5898         _cleanup_close_ int fd;
5899         struct sd_shutdown_command c = {
5900                 .usec = t,
5901                 .mode = mode,
5902                 .dry_run = dry_run,
5903                 .warn_wall = warn,
5904         };
5905         union sockaddr_union sockaddr = {
5906                 .un.sun_family = AF_UNIX,
5907                 .un.sun_path = "/run/systemd/shutdownd",
5908         };
5909         struct iovec iovec[2] = {
5910                 {.iov_base = (char*) &c,
5911                  .iov_len = offsetof(struct sd_shutdown_command, wall_message),
5912                 }
5913         };
5914         struct msghdr msghdr = {
5915                 .msg_name = &sockaddr,
5916                 .msg_namelen = offsetof(struct sockaddr_un, sun_path)
5917                                + sizeof("/run/systemd/shutdownd") - 1,
5918                 .msg_iov = iovec,
5919                 .msg_iovlen = 1,
5920         };
5921
5922         fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
5923         if (fd < 0)
5924                 return -errno;
5925
5926         if (!isempty(message)) {
5927                 iovec[1].iov_base = (char*) message;
5928                 iovec[1].iov_len = strlen(message);
5929                 msghdr.msg_iovlen++;
5930         }
5931
5932         if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0)
5933                 return -errno;
5934
5935         return 0;
5936 }
5937
5938 static int reload_with_fallback(DBusConnection *bus) {
5939
5940         if (bus) {
5941                 /* First, try systemd via D-Bus. */
5942                 if (daemon_reload(bus, NULL) >= 0)
5943                         return 0;
5944         }
5945
5946         /* Nothing else worked, so let's try signals */
5947         assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC);
5948
5949         if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) {
5950                 log_error("kill() failed: %m");
5951                 return -errno;
5952         }
5953
5954         return 0;
5955 }
5956
5957 static int start_with_fallback(DBusConnection *bus) {
5958
5959         if (bus) {
5960                 /* First, try systemd via D-Bus. */
5961                 if (start_unit(bus, NULL) >= 0)
5962                         goto done;
5963         }
5964
5965         /* Hmm, talking to systemd via D-Bus didn't work. Then
5966          * let's try to talk to Upstart via D-Bus. */
5967         if (talk_upstart() > 0)
5968                 goto done;
5969
5970         /* Nothing else worked, so let's try
5971          * /dev/initctl */
5972         if (talk_initctl() > 0)
5973                 goto done;
5974
5975         log_error("Failed to talk to init daemon.");
5976         return -EIO;
5977
5978 done:
5979         warn_wall(arg_action);
5980         return 0;
5981 }
5982
5983 static _noreturn_ void halt_now(enum action a) {
5984
5985        /* Make sure C-A-D is handled by the kernel from this
5986          * point on... */
5987         reboot(RB_ENABLE_CAD);
5988
5989         switch (a) {
5990
5991         case ACTION_HALT:
5992                 log_info("Halting.");
5993                 reboot(RB_HALT_SYSTEM);
5994                 break;
5995
5996         case ACTION_POWEROFF:
5997                 log_info("Powering off.");
5998                 reboot(RB_POWER_OFF);
5999                 break;
6000
6001         case ACTION_REBOOT:
6002                 log_info("Rebooting.");
6003                 reboot(RB_AUTOBOOT);
6004                 break;
6005
6006         default:
6007                 assert_not_reached("Unknown halt action.");
6008         }
6009
6010         assert_not_reached("Uh? This shouldn't happen.");
6011 }
6012
6013 static int halt_main(DBusConnection *bus) {
6014         int r;
6015
6016         r = check_inhibitors(bus, arg_action);
6017         if (r < 0)
6018                 return r;
6019
6020         if (geteuid() != 0) {
6021                 /* Try logind if we are a normal user and no special
6022                  * mode applies. Maybe PolicyKit allows us to shutdown
6023                  * the machine. */
6024
6025                 if (arg_when <= 0 &&
6026                     !arg_dry &&
6027                     arg_force <= 0 &&
6028                     (arg_action == ACTION_POWEROFF ||
6029                      arg_action == ACTION_REBOOT)) {
6030                         r = reboot_with_logind(bus, arg_action);
6031                         if (r >= 0)
6032                                 return r;
6033                 }
6034
6035                 log_error("Must be root.");
6036                 return -EPERM;
6037         }
6038
6039         if (arg_when > 0) {
6040                 _cleanup_free_ char *m;
6041
6042                 m = strv_join(arg_wall, " ");
6043                 r = send_shutdownd(arg_when,
6044                                    arg_action == ACTION_HALT     ? 'H' :
6045                                    arg_action == ACTION_POWEROFF ? 'P' :
6046                                    arg_action == ACTION_KEXEC    ? 'K' :
6047                                                                    'r',
6048                                    arg_dry,
6049                                    !arg_no_wall,
6050                                    m);
6051
6052                 if (r < 0)
6053                         log_warning("Failed to talk to shutdownd, proceeding with immediate shutdown: %s", strerror(-r));
6054                 else {
6055                         char date[FORMAT_TIMESTAMP_MAX];
6056
6057                         log_info("Shutdown scheduled for %s, use 'shutdown -c' to cancel.",
6058                                  format_timestamp(date, sizeof(date), arg_when));
6059                         return 0;
6060                 }
6061         }
6062
6063         if (!arg_dry && !arg_force)
6064                 return start_with_fallback(bus);
6065
6066         if (!arg_no_wtmp) {
6067                 if (sd_booted() > 0)
6068                         log_debug("Not writing utmp record, assuming that systemd-update-utmp is used.");
6069                 else {
6070                         r = utmp_put_shutdown();
6071                         if (r < 0)
6072                                 log_warning("Failed to write utmp record: %s", strerror(-r));
6073                 }
6074         }
6075
6076         if (arg_dry)
6077                 return 0;
6078
6079         halt_now(arg_action);
6080         /* We should never reach this. */
6081         return -ENOSYS;
6082 }
6083
6084 static int runlevel_main(void) {
6085         int r, runlevel, previous;
6086
6087         r = utmp_get_runlevel(&runlevel, &previous);
6088         if (r < 0) {
6089                 puts("unknown");
6090                 return r;
6091         }
6092
6093         printf("%c %c\n",
6094                previous <= 0 ? 'N' : previous,
6095                runlevel <= 0 ? 'N' : runlevel);
6096
6097         return 0;
6098 }
6099
6100 int main(int argc, char*argv[]) {
6101         int r, retval = EXIT_FAILURE;
6102         DBusConnection *bus = NULL;
6103         _cleanup_dbus_error_free_ DBusError error;
6104
6105         dbus_error_init(&error);
6106
6107         setlocale(LC_ALL, "");
6108         log_parse_environment();
6109         log_open();
6110
6111         r = parse_argv(argc, argv);
6112         if (r < 0)
6113                 goto finish;
6114         else if (r == 0) {
6115                 retval = EXIT_SUCCESS;
6116                 goto finish;
6117         }
6118
6119         /* /sbin/runlevel doesn't need to communicate via D-Bus, so
6120          * let's shortcut this */
6121         if (arg_action == ACTION_RUNLEVEL) {
6122                 r = runlevel_main();
6123                 retval = r < 0 ? EXIT_FAILURE : r;
6124                 goto finish;
6125         }
6126
6127         if (running_in_chroot() > 0 && arg_action != ACTION_SYSTEMCTL) {
6128                 log_info("Running in chroot, ignoring request.");
6129                 retval = 0;
6130                 goto finish;
6131         }
6132
6133         if (!avoid_bus()) {
6134                 if (arg_transport == TRANSPORT_NORMAL)
6135                         bus_connect(arg_scope == UNIT_FILE_SYSTEM ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, &bus, &private_bus, &error);
6136                 else if (arg_transport == TRANSPORT_POLKIT) {
6137                         bus_connect_system_polkit(&bus, &error);
6138                         private_bus = false;
6139                 } else if (arg_transport == TRANSPORT_SSH) {
6140                         bus_connect_system_ssh(arg_user, arg_host, &bus, &error);
6141                         private_bus = false;
6142                 } else
6143                         assert_not_reached("Uh, invalid transport...");
6144         }
6145
6146         switch (arg_action) {
6147
6148         case ACTION_SYSTEMCTL:
6149                 r = systemctl_main(bus, argc, argv, &error);
6150                 break;
6151
6152         case ACTION_HALT:
6153         case ACTION_POWEROFF:
6154         case ACTION_REBOOT:
6155         case ACTION_KEXEC:
6156                 r = halt_main(bus);
6157                 break;
6158
6159         case ACTION_RUNLEVEL2:
6160         case ACTION_RUNLEVEL3:
6161         case ACTION_RUNLEVEL4:
6162         case ACTION_RUNLEVEL5:
6163         case ACTION_RESCUE:
6164         case ACTION_EMERGENCY:
6165         case ACTION_DEFAULT:
6166                 r = start_with_fallback(bus);
6167                 break;
6168
6169         case ACTION_RELOAD:
6170         case ACTION_REEXEC:
6171                 r = reload_with_fallback(bus);
6172                 break;
6173
6174         case ACTION_CANCEL_SHUTDOWN: {
6175                 char *m = NULL;
6176
6177                 if (arg_wall) {
6178                         m = strv_join(arg_wall, " ");
6179                         if (!m) {
6180                                 retval = EXIT_FAILURE;
6181                                 goto finish;
6182                         }
6183                 }
6184                 r = send_shutdownd(arg_when, SD_SHUTDOWN_NONE, false, !arg_no_wall, m);
6185                 if (r < 0)
6186                         log_warning("Failed to talk to shutdownd, shutdown hasn't been cancelled: %s", strerror(-r));
6187                 free(m);
6188                 break;
6189         }
6190
6191         case ACTION_INVALID:
6192         case ACTION_RUNLEVEL:
6193         default:
6194                 assert_not_reached("Unknown action");
6195         }
6196
6197         retval = r < 0 ? EXIT_FAILURE : r;
6198
6199 finish:
6200         if (bus) {
6201                 dbus_connection_flush(bus);
6202                 dbus_connection_close(bus);
6203                 dbus_connection_unref(bus);
6204         }
6205
6206         dbus_shutdown();
6207
6208         strv_free(arg_types);
6209         strv_free(arg_states);
6210         strv_free(arg_properties);
6211
6212         pager_close();
6213         ask_password_agent_close();
6214         polkit_agent_close();
6215
6216         return retval;
6217 }