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