src/systemctl.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <sys/reboot.h>
  23 #include <stdio.h>
  24 #include <getopt.h>
  25 #include <stdbool.h>
  26 #include <string.h>
  27 #include <errno.h>
  28 #include <sys/ioctl.h>
  29 #include <termios.h>
  30 #include <unistd.h>
  31 #include <fcntl.h>
  32 #include <sys/socket.h>
  33 #include <sys/stat.h>
  34
  35 #include <dbus/dbus.h>
  36
  37 #include "log.h"
  38 #include "util.h"
  39 #include "macro.h"
  40 #include "set.h"
  41 #include "utmp-wtmp.h"
  42 #include "special.h"
  43 #include "initreq.h"
  44 #include "strv.h"
  45 #include "dbus-common.h"
  46 #include "cgroup-show.h"
  47 #include "cgroup-util.h"
  48 #include "list.h"
  49 #include "path-lookup.h"
  50 #include "conf-parser.h"
  51 #include "sd-daemon.h"
  52 #include "shutdownd.h"
  53 #include "exit-status.h"
  54 #include "bus-errors.h"
  55 #include "build.h"
  56
  57 static const char *arg_type = NULL;
  58 static char **arg_property = NULL;
  59 static bool arg_all = false;
  60 static bool arg_fail = false;
  61 static bool arg_session = false;
  62 static bool arg_global = false;
  63 static bool arg_immediate = false;
  64 static bool arg_no_block = false;
  65 static bool arg_no_wtmp = false;
  66 static bool arg_no_sync = false;
  67 static bool arg_no_wall = false;
  68 static bool arg_no_reload = false;
  69 static bool arg_dry = false;
  70 static bool arg_quiet = false;
  71 static bool arg_full = false;
  72 static bool arg_force = false;
  73 static bool arg_defaults = false;
  74 static char **arg_wall = NULL;
  75 static usec_t arg_when = 0;
  76 static enum action {
  77         ACTION_INVALID,
  78         ACTION_SYSTEMCTL,
  79         ACTION_HALT,
  80         ACTION_POWEROFF,
  81         ACTION_REBOOT,
  82         ACTION_RUNLEVEL2,
  83         ACTION_RUNLEVEL3,
  84         ACTION_RUNLEVEL4,
  85         ACTION_RUNLEVEL5,
  86         ACTION_RESCUE,
  87         ACTION_EMERGENCY,
  88         ACTION_DEFAULT,
  89         ACTION_RELOAD,
  90         ACTION_REEXEC,
  91         ACTION_RUNLEVEL,
  92         ACTION_CANCEL_SHUTDOWN,
  93         _ACTION_MAX
  94 } arg_action = ACTION_SYSTEMCTL;
  95 static enum dot {
  96         DOT_ALL,
  97         DOT_ORDER,
  98         DOT_REQUIRE
  99 } arg_dot = DOT_ALL;
 100
 101 static bool private_bus = false;
 102
 103 static int daemon_reload(DBusConnection *bus, char **args, unsigned n);
 104
 105 static bool on_tty(void) {
 106         static int t = -1;
 107
 108         if (_unlikely_(t < 0))
 109                 t = isatty(STDOUT_FILENO) > 0;
 110
 111         return t;
 112 }
 113
 114 static const char *ansi_highlight(bool b) {
 115
 116         if (!on_tty())
 117                 return "";
 118
 119         return b ? ANSI_HIGHLIGHT_ON : ANSI_HIGHLIGHT_OFF;
 120 }
 121
 122 static const char *ansi_highlight_green(bool b) {
 123
 124         if (!on_tty())
 125                 return "";
 126
 127         return b ? ANSI_HIGHLIGHT_GREEN_ON : ANSI_HIGHLIGHT_OFF;
 128 }
 129
 130 static bool error_is_no_service(const DBusError *error) {
 131         assert(error);
 132
 133         if (!dbus_error_is_set(error))
 134                 return false;
 135
 136         if (dbus_error_has_name(error, DBUS_ERROR_NAME_HAS_NO_OWNER))
 137                 return true;
 138
 139         if (dbus_error_has_name(error, DBUS_ERROR_SERVICE_UNKNOWN))
 140                 return true;
 141
 142         return startswith(error->name, "org.freedesktop.DBus.Error.Spawn.");
 143 }
 144
 145 static int translate_bus_error_to_exit_status(int r, const DBusError *error) {
 146         assert(error);
 147
 148         if (!dbus_error_is_set(error))
 149                 return r;
 150
 151         if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED) ||
 152             dbus_error_has_name(error, BUS_ERROR_ONLY_BY_DEPENDENCY) ||
 153             dbus_error_has_name(error, BUS_ERROR_NO_ISOLATION) ||
 154             dbus_error_has_name(error, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE))
 155                 return EXIT_NOPERMISSION;
 156
 157         if (dbus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT))
 158                 return EXIT_NOTINSTALLED;
 159
 160         if (dbus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE) ||
 161             dbus_error_has_name(error, BUS_ERROR_NOT_SUPPORTED))
 162                 return EXIT_NOTIMPLEMENTED;
 163
 164         if (dbus_error_has_name(error, BUS_ERROR_LOAD_FAILED))
 165                 return EXIT_NOTCONFIGURED;
 166
 167         if (r != 0)
 168                 return r;
 169
 170         return EXIT_FAILURE;
 171 }
 172
 173 static int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
 174
 175         assert(iter);
 176         assert(data);
 177
 178         if (dbus_message_iter_get_arg_type(iter) != type)
 179                 return -EIO;
 180
 181         dbus_message_iter_get_basic(iter, data);
 182
 183         if (!dbus_message_iter_next(iter) != !next)
 184                 return -EIO;
 185
 186         return 0;
 187 }
 188
 189 static void warn_wall(enum action action) {
 190         static const char *table[_ACTION_MAX] = {
 191                 [ACTION_HALT]      = "The system is going down for system halt NOW!",
 192                 [ACTION_REBOOT]    = "The system is going down for reboot NOW!",
 193                 [ACTION_POWEROFF]  = "The system is going down for power-off NOW!",
 194                 [ACTION_RESCUE]    = "The system is going down to rescue mode NOW!",
 195                 [ACTION_EMERGENCY] = "The system is going down to emergency mode NOW!"
 196         };
 197
 198         if (arg_no_wall)
 199                 return;
 200
 201         if (arg_wall) {
 202                 char *p;
 203
 204                 if (!(p = strv_join(arg_wall, " "))) {
 205                         log_error("Failed to join strings.");
 206                         return;
 207                 }
 208
 209                 if (*p) {
 210                         utmp_wall(p);
 211                         free(p);
 212                         return;
 213                 }
 214
 215                 free(p);
 216         }
 217
 218         if (!table[action])
 219                 return;
 220
 221         utmp_wall(table[action]);
 222 }
 223
 224 struct unit_info {
 225         const char *id;
 226         const char *description;
 227         const char *load_state;
 228         const char *active_state;
 229         const char *sub_state;
 230         const char *following;
 231         const char *unit_path;
 232         uint32_t job_id;
 233         const char *job_type;
 234         const char *job_path;
 235 };
 236
 237 static int compare_unit_info(const void *a, const void *b) {
 238         const char *d1, *d2;
 239         const struct unit_info *u = a, *v = b;
 240
 241         d1 = strrchr(u->id, '.');
 242         d2 = strrchr(v->id, '.');
 243
 244         if (d1 && d2) {
 245                 int r;
 246
 247                 if ((r = strcasecmp(d1, d2)) != 0)
 248                         return r;
 249         }
 250
 251         return strcasecmp(u->id, v->id);
 252 }
 253
 254 static int list_units(DBusConnection *bus, char **args, unsigned n) {
 255         DBusMessage *m = NULL, *reply = NULL;
 256         DBusError error;
 257         int r;
 258         DBusMessageIter iter, sub, sub2;
 259         unsigned c = 0, k, n_units = 0;
 260         struct unit_info *unit_infos = NULL;
 261
 262         dbus_error_init(&error);
 263
 264         assert(bus);
 265
 266         if (!(m = dbus_message_new_method_call(
 267                               "org.freedesktop.systemd1",
 268                               "/org/freedesktop/systemd1",
 269                               "org.freedesktop.systemd1.Manager",
 270                               "ListUnits"))) {
 271                 log_error("Could not allocate message.");
 272                 return -ENOMEM;
 273         }
 274
 275         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 276                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 277                 r = -EIO;
 278                 goto finish;
 279         }
 280
 281         if (!dbus_message_iter_init(reply, &iter) ||
 282             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 283             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 284                 log_error("Failed to parse reply.");
 285                 r = -EIO;
 286                 goto finish;
 287         }
 288
 289         dbus_message_iter_recurse(&iter, &sub);
 290
 291         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 292                 struct unit_info *u;
 293
 294                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 295                         log_error("Failed to parse reply.");
 296                         r = -EIO;
 297                         goto finish;
 298                 }
 299
 300                 if (c >= n_units) {
 301                         struct unit_info *w;
 302
 303                         n_units = MAX(2*c, 16);
 304                         w = realloc(unit_infos, sizeof(struct unit_info) * n_units);
 305
 306                         if (!w) {
 307                                 log_error("Failed to allocate unit array.");
 308                                 r = -ENOMEM;
 309                                 goto finish;
 310                         }
 311
 312                         unit_infos = w;
 313                 }
 314
 315                 u = unit_infos+c;
 316
 317                 dbus_message_iter_recurse(&sub, &sub2);
 318
 319                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->id, true) < 0 ||
 320                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->description, true) < 0 ||
 321                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->load_state, true) < 0 ||
 322                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->active_state, true) < 0 ||
 323                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->sub_state, true) < 0 ||
 324                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->following, true) < 0 ||
 325                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->unit_path, true) < 0 ||
 326                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &u->job_id, true) < 0 ||
 327                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &u->job_type, true) < 0 ||
 328                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &u->job_path, false) < 0) {
 329                         log_error("Failed to parse reply.");
 330                         r = -EIO;
 331                         goto finish;
 332                 }
 333
 334                 dbus_message_iter_next(&sub);
 335                 c++;
 336         }
 337
 338         qsort(unit_infos, c, sizeof(struct unit_info), compare_unit_info);
 339
 340         if (isatty(STDOUT_FILENO)) {
 341                 if (columns() >= 80+12 || arg_full)
 342                         printf("%-25s %-6s %-12s %-18s %-15s %s\n", "UNIT", "LOAD", "ACTIVE", "SUB", "JOB", "DESCRIPTION");
 343                 else
 344                         printf("%-25s %-6s %-12s %-18s %-15s\n", "UNIT", "LOAD", "ACTIVE", "SUB", "JOB");
 345         }
 346
 347         for (k = 0; k < c; k++) {
 348                 const char *dot;
 349                 struct unit_info *u = unit_infos+k;
 350
 351                 if ((!arg_type || ((dot = strrchr(u->id, '.')) &&
 352                                    streq(dot+1, arg_type))) &&
 353                     (arg_all || !(streq(u->active_state, "inactive") || u->following[0]) || u->job_id > 0)) {
 354                         char *e;
 355                         int a = 0, b = 0;
 356                         const char *on_loaded, *off_loaded;
 357                         const char *on_active, *off_active;
 358
 359                         if (!streq(u->load_state, "loaded")) {
 360                                 on_loaded = ansi_highlight(true);
 361                                 off_loaded = ansi_highlight(false);
 362                         } else
 363                                 on_loaded = off_loaded = "";
 364
 365                         if (streq(u->active_state, "failed")) {
 366                                 on_active = ansi_highlight(true);
 367                                 off_active = ansi_highlight(false);
 368                         } else
 369                                 on_active = off_active = "";
 370
 371                         e = arg_full ? NULL : ellipsize(u->id, 25, 33);
 372
 373                         printf("%-25s %s%-6s%s %s%-12s %-18s%s%n",
 374                                e ? e : u->id,
 375                                on_loaded, u->load_state, off_loaded,
 376                                on_active, u->active_state, u->sub_state, off_active,
 377                                &a);
 378
 379                         free(e);
 380
 381                         a -= strlen(on_loaded) + strlen(off_loaded);
 382                         a -= strlen(on_active) + strlen(off_active);
 383
 384                         if (u->job_id != 0)
 385                                 printf(" %-15s%n", u->job_type, &b);
 386                         else
 387                                 b = 1 + 15;
 388
 389                         if (a + b + 1 < columns()) {
 390                                 if (u->job_id == 0)
 391                                         printf("                ");
 392
 393                                 if (arg_full)
 394                                         printf(" %s", u->description);
 395                                 else
 396                                         printf(" %.*s", columns() - a - b - 1, u->description);
 397                         }
 398
 399                         fputs("\n", stdout);
 400                 }
 401         }
 402
 403         if (isatty(STDOUT_FILENO)) {
 404
 405                 printf("\nLOAD   = Reflects whether the unit definition was properly loaded.\n"
 406                        "ACTIVE = The high-level unit activation state, i.e. generalization of SUB.\n"
 407                        "SUB    = The low-level unit activation state, values depend on unit type.\n"
 408                        "JOB    = Pending job for the unit.\n");
 409
 410                 if (arg_all)
 411                         printf("\n%u units listed.\n", c);
 412                 else
 413                         printf("\n%u units listed. Pass --all to see inactive units, too.\n", c);
 414         }
 415
 416         r = 0;
 417
 418 finish:
 419         if (m)
 420                 dbus_message_unref(m);
 421
 422         if (reply)
 423                 dbus_message_unref(reply);
 424
 425         free(unit_infos);
 426
 427         dbus_error_free(&error);
 428
 429         return r;
 430 }
 431
 432 static int dot_one_property(const char *name, const char *prop, DBusMessageIter *iter) {
 433         static const char * const colors[] = {
 434                 "Requires",              "[color=\"black\"]",
 435                 "RequiresOverridable",   "[color=\"black\"]",
 436                 "Requisite",             "[color=\"darkblue\"]",
 437                 "RequisiteOverridable",  "[color=\"darkblue\"]",
 438                 "Wants",                 "[color=\"darkgrey\"]",
 439                 "Conflicts",             "[color=\"red\"]",
 440                 "ConflictedBy",          "[color=\"red\"]",
 441                 "After",                 "[color=\"green\"]"
 442         };
 443
 444         const char *c = NULL;
 445         unsigned i;
 446
 447         assert(name);
 448         assert(prop);
 449         assert(iter);
 450
 451         for (i = 0; i < ELEMENTSOF(colors); i += 2)
 452                 if (streq(colors[i], prop)) {
 453                         c = colors[i+1];
 454                         break;
 455                 }
 456
 457         if (!c)
 458                 return 0;
 459
 460         if (arg_dot != DOT_ALL)
 461                 if ((arg_dot == DOT_ORDER) != streq(prop, "After"))
 462                         return 0;
 463
 464         switch (dbus_message_iter_get_arg_type(iter)) {
 465
 466         case DBUS_TYPE_ARRAY:
 467
 468                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
 469                         DBusMessageIter sub;
 470
 471                         dbus_message_iter_recurse(iter, &sub);
 472
 473                         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 474                                 const char *s;
 475
 476                                 assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
 477                                 dbus_message_iter_get_basic(&sub, &s);
 478                                 printf("\t\"%s\"->\"%s\" %s;\n", name, s, c);
 479
 480                                 dbus_message_iter_next(&sub);
 481                         }
 482
 483                         return 0;
 484                 }
 485         }
 486
 487         return 0;
 488 }
 489
 490 static int dot_one(DBusConnection *bus, const char *name, const char *path) {
 491         DBusMessage *m = NULL, *reply = NULL;
 492         const char *interface = "org.freedesktop.systemd1.Unit";
 493         int r;
 494         DBusError error;
 495         DBusMessageIter iter, sub, sub2, sub3;
 496
 497         assert(bus);
 498         assert(path);
 499
 500         dbus_error_init(&error);
 501
 502         if (!(m = dbus_message_new_method_call(
 503                               "org.freedesktop.systemd1",
 504                               path,
 505                               "org.freedesktop.DBus.Properties",
 506                               "GetAll"))) {
 507                 log_error("Could not allocate message.");
 508                 r = -ENOMEM;
 509                 goto finish;
 510         }
 511
 512         if (!dbus_message_append_args(m,
 513                                       DBUS_TYPE_STRING, &interface,
 514                                       DBUS_TYPE_INVALID)) {
 515                 log_error("Could not append arguments to message.");
 516                 r = -ENOMEM;
 517                 goto finish;
 518         }
 519
 520         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 521                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 522                 r = -EIO;
 523                 goto finish;
 524         }
 525
 526         if (!dbus_message_iter_init(reply, &iter) ||
 527             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 528             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
 529                 log_error("Failed to parse reply.");
 530                 r = -EIO;
 531                 goto finish;
 532         }
 533
 534         dbus_message_iter_recurse(&iter, &sub);
 535
 536         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 537                 const char *prop;
 538
 539                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
 540                         log_error("Failed to parse reply.");
 541                         r = -EIO;
 542                         goto finish;
 543                 }
 544
 545                 dbus_message_iter_recurse(&sub, &sub2);
 546
 547                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &prop, true) < 0) {
 548                         log_error("Failed to parse reply.");
 549                         r = -EIO;
 550                         goto finish;
 551                 }
 552
 553                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
 554                         log_error("Failed to parse reply.");
 555                         r = -EIO;
 556                         goto finish;
 557                 }
 558
 559                 dbus_message_iter_recurse(&sub2, &sub3);
 560
 561                 if (dot_one_property(name, prop, &sub3)) {
 562                         log_error("Failed to parse reply.");
 563                         r = -EIO;
 564                         goto finish;
 565                 }
 566
 567                 dbus_message_iter_next(&sub);
 568         }
 569
 570         r = 0;
 571
 572 finish:
 573         if (m)
 574                 dbus_message_unref(m);
 575
 576         if (reply)
 577                 dbus_message_unref(reply);
 578
 579         dbus_error_free(&error);
 580
 581         return r;
 582 }
 583
 584 static int dot(DBusConnection *bus, char **args, unsigned n) {
 585         DBusMessage *m = NULL, *reply = NULL;
 586         DBusError error;
 587         int r;
 588         DBusMessageIter iter, sub, sub2;
 589
 590         dbus_error_init(&error);
 591
 592         assert(bus);
 593
 594         if (!(m = dbus_message_new_method_call(
 595                               "org.freedesktop.systemd1",
 596                               "/org/freedesktop/systemd1",
 597                               "org.freedesktop.systemd1.Manager",
 598                               "ListUnits"))) {
 599                 log_error("Could not allocate message.");
 600                 return -ENOMEM;
 601         }
 602
 603         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 604                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 605                 r = -EIO;
 606                 goto finish;
 607         }
 608
 609         if (!dbus_message_iter_init(reply, &iter) ||
 610             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 611             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 612                 log_error("Failed to parse reply.");
 613                 r = -EIO;
 614                 goto finish;
 615         }
 616
 617         printf("digraph systemd {\n");
 618
 619         dbus_message_iter_recurse(&iter, &sub);
 620         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 621                 const char *id, *description, *load_state, *active_state, *sub_state, *following, *unit_path;
 622
 623                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 624                         log_error("Failed to parse reply.");
 625                         r = -EIO;
 626                         goto finish;
 627                 }
 628
 629                 dbus_message_iter_recurse(&sub, &sub2);
 630
 631                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &id, true) < 0 ||
 632                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &description, true) < 0 ||
 633                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &load_state, true) < 0 ||
 634                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &active_state, true) < 0 ||
 635                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &sub_state, true) < 0 ||
 636                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &following, true) < 0 ||
 637                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, true) < 0) {
 638                         log_error("Failed to parse reply.");
 639                         r = -EIO;
 640                         goto finish;
 641                 }
 642
 643                 if ((r = dot_one(bus, id, unit_path)) < 0)
 644                         goto finish;
 645
 646                 /* printf("\t\"%s\";\n", id); */
 647                 dbus_message_iter_next(&sub);
 648         }
 649
 650         printf("}\n");
 651
 652         log_info("   Color legend: black     = Requires\n"
 653                  "                 dark blue = Requisite\n"
 654                  "                 dark grey = Wants\n"
 655                  "                 red       = Conflicts\n"
 656                  "                 green     = After\n");
 657
 658         if (isatty(fileno(stdout)))
 659                 log_notice("-- You probably want to process this output with graphviz' dot tool.\n"
 660                            "-- Try a shell pipeline like 'systemctl dot | dot -Tsvg > systemd.svg'!\n");
 661
 662         r = 0;
 663
 664 finish:
 665         if (m)
 666                 dbus_message_unref(m);
 667
 668         if (reply)
 669                 dbus_message_unref(reply);
 670
 671         dbus_error_free(&error);
 672
 673         return r;
 674 }
 675
 676 static int list_jobs(DBusConnection *bus, char **args, unsigned n) {
 677         DBusMessage *m = NULL, *reply = NULL;
 678         DBusError error;
 679         int r;
 680         DBusMessageIter iter, sub, sub2;
 681         unsigned k = 0;
 682
 683         dbus_error_init(&error);
 684
 685         assert(bus);
 686
 687         if (!(m = dbus_message_new_method_call(
 688                               "org.freedesktop.systemd1",
 689                               "/org/freedesktop/systemd1",
 690                               "org.freedesktop.systemd1.Manager",
 691                               "ListJobs"))) {
 692                 log_error("Could not allocate message.");
 693                 return -ENOMEM;
 694         }
 695
 696         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 697                 log_error("Failed to issue method call: %s", bus_error_message(&error));
 698                 r = -EIO;
 699                 goto finish;
 700         }
 701
 702         if (!dbus_message_iter_init(reply, &iter) ||
 703             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 704             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRUCT)  {
 705                 log_error("Failed to parse reply.");
 706                 r = -EIO;
 707                 goto finish;
 708         }
 709
 710         dbus_message_iter_recurse(&iter, &sub);
 711
 712         if (isatty(STDOUT_FILENO))
 713                 printf("%4s %-25s %-15s %-7s\n", "JOB", "UNIT", "TYPE", "STATE");
 714
 715         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
 716                 const char *name, *type, *state, *job_path, *unit_path;
 717                 uint32_t id;
 718                 char *e;
 719
 720                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
 721                         log_error("Failed to parse reply.");
 722                         r = -EIO;
 723                         goto finish;
 724                 }
 725
 726                 dbus_message_iter_recurse(&sub, &sub2);
 727
 728                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &id, true) < 0 ||
 729                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0 ||
 730                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) < 0 ||
 731                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &state, true) < 0 ||
 732                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &job_path, true) < 0 ||
 733                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_OBJECT_PATH, &unit_path, false) < 0) {
 734                         log_error("Failed to parse reply.");
 735                         r = -EIO;
 736                         goto finish;
 737                 }
 738
 739                 e = arg_full ? NULL : ellipsize(name, 25, 33);
 740                 printf("%4u %-25s %-15s %-7s\n", id, e ? e : name, type, state);
 741                 free(e);
 742
 743                 k++;
 744
 745                 dbus_message_iter_next(&sub);
 746         }
 747
 748         if (isatty(STDOUT_FILENO))
 749                 printf("\n%u jobs listed.\n", k);
 750
 751         r = 0;
 752
 753 finish:
 754         if (m)
 755                 dbus_message_unref(m);
 756
 757         if (reply)
 758                 dbus_message_unref(reply);
 759
 760         dbus_error_free(&error);
 761
 762         return r;
 763 }
 764
 765 static int load_unit(DBusConnection *bus, char **args, unsigned n) {
 766         DBusMessage *m = NULL, *reply = NULL;
 767         DBusError error;
 768         int r;
 769         unsigned i;
 770
 771         dbus_error_init(&error);
 772
 773         assert(bus);
 774         assert(args);
 775
 776         for (i = 1; i < n; i++) {
 777
 778                 if (!(m = dbus_message_new_method_call(
 779                                       "org.freedesktop.systemd1",
 780                                       "/org/freedesktop/systemd1",
 781                                       "org.freedesktop.systemd1.Manager",
 782                                       "LoadUnit"))) {
 783                         log_error("Could not allocate message.");
 784                         r = -ENOMEM;
 785                         goto finish;
 786                 }
 787
 788                 if (!dbus_message_append_args(m,
 789                                               DBUS_TYPE_STRING, &args[i],
 790                                               DBUS_TYPE_INVALID)) {
 791                         log_error("Could not append arguments to message.");
 792                         r = -ENOMEM;
 793                         goto finish;
 794                 }
 795
 796                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 797                         log_error("Failed to issue method call: %s", bus_error_message(&error));
 798                         r = -EIO;
 799                         goto finish;
 800                 }
 801
 802                 dbus_message_unref(m);
 803                 dbus_message_unref(reply);
 804
 805                 m = reply = NULL;
 806         }
 807
 808         r = 0;
 809
 810 finish:
 811         if (m)
 812                 dbus_message_unref(m);
 813
 814         if (reply)
 815                 dbus_message_unref(reply);
 816
 817         dbus_error_free(&error);
 818
 819         return r;
 820 }
 821
 822 static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
 823         DBusMessage *m = NULL, *reply = NULL;
 824         DBusError error;
 825         int r;
 826         unsigned i;
 827
 828         dbus_error_init(&error);
 829
 830         assert(bus);
 831         assert(args);
 832
 833         if (n <= 1)
 834                 return daemon_reload(bus, args, n);
 835
 836         for (i = 1; i < n; i++) {
 837                 unsigned id;
 838                 const char *path;
 839
 840                 if (!(m = dbus_message_new_method_call(
 841                                       "org.freedesktop.systemd1",
 842                                       "/org/freedesktop/systemd1",
 843                                       "org.freedesktop.systemd1.Manager",
 844                                       "GetJob"))) {
 845                         log_error("Could not allocate message.");
 846                         r = -ENOMEM;
 847                         goto finish;
 848                 }
 849
 850                 if ((r = safe_atou(args[i], &id)) < 0) {
 851                         log_error("Failed to parse job id: %s", strerror(-r));
 852                         goto finish;
 853                 }
 854
 855                 assert_cc(sizeof(uint32_t) == sizeof(id));
 856                 if (!dbus_message_append_args(m,
 857                                               DBUS_TYPE_UINT32, &id,
 858                                               DBUS_TYPE_INVALID)) {
 859                         log_error("Could not append arguments to message.");
 860                         r = -ENOMEM;
 861                         goto finish;
 862                 }
 863
 864                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 865                         log_error("Failed to issue method call: %s", bus_error_message(&error));
 866                         r = -EIO;
 867                         goto finish;
 868                 }
 869
 870                 if (!dbus_message_get_args(reply, &error,
 871                                            DBUS_TYPE_OBJECT_PATH, &path,
 872                                            DBUS_TYPE_INVALID)) {
 873                         log_error("Failed to parse reply: %s", bus_error_message(&error));
 874                         r = -EIO;
 875                         goto finish;
 876                 }
 877
 878                 dbus_message_unref(m);
 879                 if (!(m = dbus_message_new_method_call(
 880                                       "org.freedesktop.systemd1",
 881                                       path,
 882                                       "org.freedesktop.systemd1.Job",
 883                                       "Cancel"))) {
 884                         log_error("Could not allocate message.");
 885                         r = -ENOMEM;
 886                         goto finish;
 887                 }
 888
 889                 dbus_message_unref(reply);
 890                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
 891                         log_error("Failed to issue method call: %s", bus_error_message(&error));
 892                         r = -EIO;
 893                         goto finish;
 894                 }
 895
 896                 dbus_message_unref(m);
 897                 dbus_message_unref(reply);
 898                 m = reply = NULL;
 899         }
 900
 901         r = 0;
 902
 903 finish:
 904         if (m)
 905                 dbus_message_unref(m);
 906
 907         if (reply)
 908                 dbus_message_unref(reply);
 909
 910         dbus_error_free(&error);
 911
 912         return r;
 913 }
 914
 915 static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
 916         DBusMessage *m = NULL, *reply = NULL;
 917         dbus_bool_t b = FALSE;
 918         DBusMessageIter iter, sub;
 919         const char
 920                 *interface = "org.freedesktop.systemd1.Unit",
 921                 *property = "NeedDaemonReload",
 922                 *path;
 923
 924         /* We ignore all errors here, since this is used to show a warning only */
 925
 926         if (!(m = dbus_message_new_method_call(
 927                               "org.freedesktop.systemd1",
 928                               "/org/freedesktop/systemd1",
 929                               "org.freedesktop.systemd1.Manager",
 930                               "GetUnit")))
 931                 goto finish;
 932
 933         if (!dbus_message_append_args(m,
 934                                       DBUS_TYPE_STRING, &unit,
 935                                       DBUS_TYPE_INVALID))
 936                 goto finish;
 937
 938         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
 939                 goto finish;
 940
 941         if (!dbus_message_get_args(reply, NULL,
 942                                    DBUS_TYPE_OBJECT_PATH, &path,
 943                                    DBUS_TYPE_INVALID))
 944                 goto finish;
 945
 946         dbus_message_unref(m);
 947         if (!(m = dbus_message_new_method_call(
 948                               "org.freedesktop.systemd1",
 949                               path,
 950                               "org.freedesktop.DBus.Properties",
 951                               "Get")))
 952                 goto finish;
 953
 954         if (!dbus_message_append_args(m,
 955                                       DBUS_TYPE_STRING, &interface,
 956                                       DBUS_TYPE_STRING, &property,
 957                                       DBUS_TYPE_INVALID)) {
 958                 goto finish;
 959         }
 960
 961         dbus_message_unref(reply);
 962         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, NULL)))
 963                 goto finish;
 964
 965         if (!dbus_message_iter_init(reply, &iter) ||
 966             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)
 967                 goto finish;
 968
 969         dbus_message_iter_recurse(&iter, &sub);
 970
 971         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_BOOLEAN)
 972                 goto finish;
 973
 974         dbus_message_iter_get_basic(&sub, &b);
 975
 976 finish:
 977         if (m)
 978                 dbus_message_unref(m);
 979
 980         if (reply)
 981                 dbus_message_unref(reply);
 982
 983         return b;
 984 }
 985
 986 typedef struct WaitData {
 987         Set *set;
 988         bool failed;
 989 } WaitData;
 990
 991 static DBusHandlerResult wait_filter(DBusConnection *connection, DBusMessage *message, void *data) {
 992         DBusError error;
 993         WaitData *d = data;
 994
 995         assert(connection);
 996         assert(message);
 997         assert(d);
 998
 999         dbus_error_init(&error);
1000
1001         log_debug("Got D-Bus request: %s.%s() on %s",
1002                   dbus_message_get_interface(message),
1003                   dbus_message_get_member(message),
1004                   dbus_message_get_path(message));
1005
1006         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
1007                 log_error("Warning! D-Bus connection terminated.");
1008                 dbus_connection_close(connection);
1009
1010         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
1011                 uint32_t id;
1012                 const char *path;
1013                 dbus_bool_t success = true;
1014
1015                 if (!dbus_message_get_args(message, &error,
1016                                            DBUS_TYPE_UINT32, &id,
1017                                            DBUS_TYPE_OBJECT_PATH, &path,
1018                                            DBUS_TYPE_BOOLEAN, &success,
1019                                            DBUS_TYPE_INVALID))
1020                         log_error("Failed to parse message: %s", bus_error_message(&error));
1021                 else {
1022                         char *p;
1023
1024                         if ((p = set_remove(d->set, (char*) path)))
1025                                 free(p);
1026
1027                         if (!success)
1028                                 d->failed = true;
1029                 }
1030         }
1031
1032         dbus_error_free(&error);
1033         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1034 }
1035
1036 static int enable_wait_for_jobs(DBusConnection *bus) {
1037         DBusError error;
1038
1039         assert(bus);
1040
1041         if (private_bus)
1042                 return 0;
1043
1044         dbus_error_init(&error);
1045         dbus_bus_add_match(bus,
1046                            "type='signal',"
1047                            "sender='org.freedesktop.systemd1',"
1048                            "interface='org.freedesktop.systemd1.Manager',"
1049                            "member='JobRemoved',"
1050                            "path='/org/freedesktop/systemd1'",
1051                            &error);
1052
1053         if (dbus_error_is_set(&error)) {
1054                 log_error("Failed to add match: %s", bus_error_message(&error));
1055                 dbus_error_free(&error);
1056                 return -EIO;
1057         }
1058
1059         /* This is slightly dirty, since we don't undo the match registrations. */
1060         return 0;
1061 }
1062
1063 static int wait_for_jobs(DBusConnection *bus, Set *s) {
1064         int r;
1065         WaitData d;
1066
1067         assert(bus);
1068         assert(s);
1069
1070         zero(d);
1071         d.set = s;
1072         d.failed = false;
1073
1074         if (!dbus_connection_add_filter(bus, wait_filter, &d, NULL)) {
1075                 log_error("Failed to add filter.");
1076                 r = -ENOMEM;
1077                 goto finish;
1078         }
1079
1080         while (!set_isempty(s) &&
1081                dbus_connection_read_write_dispatch(bus, -1))
1082                 ;
1083
1084         if (!arg_quiet && d.failed)
1085                 log_error("Job failed, see system logs for details.");
1086
1087         r = d.failed ? -EIO : 0;
1088
1089 finish:
1090         /* This is slightly dirty, since we don't undo the filter registration. */
1091
1092         return r;
1093 }
1094
1095 static int start_unit_one(
1096                 DBusConnection *bus,
1097                 const char *method,
1098                 const char *name,
1099                 const char *mode,
1100                 DBusError *error,
1101                 Set *s) {
1102
1103         DBusMessage *m = NULL, *reply = NULL;
1104         const char *path;
1105         int r;
1106
1107         assert(bus);
1108         assert(method);
1109         assert(name);
1110         assert(mode);
1111         assert(error);
1112         assert(arg_no_block || s);
1113
1114         if (!(m = dbus_message_new_method_call(
1115                               "org.freedesktop.systemd1",
1116                               "/org/freedesktop/systemd1",
1117                               "org.freedesktop.systemd1.Manager",
1118                               method))) {
1119                 log_error("Could not allocate message.");
1120                 r = -ENOMEM;
1121                 goto finish;
1122         }
1123
1124         if (!dbus_message_append_args(m,
1125                                       DBUS_TYPE_STRING, &name,
1126                                       DBUS_TYPE_STRING, &mode,
1127                                       DBUS_TYPE_INVALID)) {
1128                 log_error("Could not append arguments to message.");
1129                 r = -ENOMEM;
1130                 goto finish;
1131         }
1132
1133         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error))) {
1134
1135                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(error)) {
1136                         /* There's always a fallback possible for
1137                          * legacy actions. */
1138                         r = -EADDRNOTAVAIL;
1139                         goto finish;
1140                 }
1141
1142                 log_error("Failed to issue method call: %s", bus_error_message(error));
1143                 r = -EIO;
1144                 goto finish;
1145         }
1146
1147         if (!dbus_message_get_args(reply, error,
1148                                    DBUS_TYPE_OBJECT_PATH, &path,
1149                                    DBUS_TYPE_INVALID)) {
1150                 log_error("Failed to parse reply: %s", bus_error_message(error));
1151                 r = -EIO;
1152                 goto finish;
1153         }
1154
1155         if (need_daemon_reload(bus, name))
1156                 log_warning("Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
1157                             arg_session ? "--session" : "--system");
1158
1159         if (!arg_no_block) {
1160                 char *p;
1161
1162                 if (!(p = strdup(path))) {
1163                         log_error("Failed to duplicate path.");
1164                         r = -ENOMEM;
1165                         goto finish;
1166                 }
1167
1168                 if ((r = set_put(s, p)) < 0) {
1169                         free(p);
1170                         log_error("Failed to add path to set.");
1171                         goto finish;
1172                 }
1173         }
1174
1175         r = 0;
1176
1177 finish:
1178         if (m)
1179                 dbus_message_unref(m);
1180
1181         if (reply)
1182                 dbus_message_unref(reply);
1183
1184         return r;
1185 }
1186
1187 static enum action verb_to_action(const char *verb) {
1188         if (streq(verb, "halt"))
1189                 return ACTION_HALT;
1190         else if (streq(verb, "poweroff"))
1191                 return ACTION_POWEROFF;
1192         else if (streq(verb, "reboot"))
1193                 return ACTION_REBOOT;
1194         else if (streq(verb, "rescue"))
1195                 return ACTION_RESCUE;
1196         else if (streq(verb, "emergency"))
1197                 return ACTION_EMERGENCY;
1198         else if (streq(verb, "default"))
1199                 return ACTION_DEFAULT;
1200         else
1201                 return ACTION_INVALID;
1202 }
1203
1204 static int start_unit(DBusConnection *bus, char **args, unsigned n) {
1205
1206         static const char * const table[_ACTION_MAX] = {
1207                 [ACTION_HALT] = SPECIAL_HALT_TARGET,
1208                 [ACTION_POWEROFF] = SPECIAL_POWEROFF_TARGET,
1209                 [ACTION_REBOOT] = SPECIAL_REBOOT_TARGET,
1210                 [ACTION_RUNLEVEL2] = SPECIAL_RUNLEVEL2_TARGET,
1211                 [ACTION_RUNLEVEL3] = SPECIAL_RUNLEVEL3_TARGET,
1212                 [ACTION_RUNLEVEL4] = SPECIAL_RUNLEVEL4_TARGET,
1213                 [ACTION_RUNLEVEL5] = SPECIAL_RUNLEVEL5_TARGET,
1214                 [ACTION_RESCUE] = SPECIAL_RESCUE_TARGET,
1215                 [ACTION_EMERGENCY] = SPECIAL_EMERGENCY_TARGET,
1216                 [ACTION_DEFAULT] = SPECIAL_DEFAULT_TARGET
1217         };
1218
1219         int r, ret = 0;
1220         unsigned i;
1221         const char *method, *mode, *one_name;
1222         Set *s = NULL;
1223         DBusError error;
1224
1225         dbus_error_init(&error);
1226
1227         assert(bus);
1228
1229         if (arg_action == ACTION_SYSTEMCTL) {
1230                 method =
1231                         streq(args[0], "stop")                  ? "StopUnit" :
1232                         streq(args[0], "reload")                ? "ReloadUnit" :
1233                         streq(args[0], "restart")               ? "RestartUnit" :
1234                         streq(args[0], "try-restart")           ? "TryRestartUnit" :
1235                         streq(args[0], "reload-or-restart")     ? "ReloadOrRestartUnit" :
1236                         streq(args[0], "reload-or-try-restart") ||
1237                         streq(args[0], "force-reload")          ||
1238                         streq(args[0], "condrestart")           ? "ReloadOrTryRestartUnit" :
1239                                                                   "StartUnit";
1240
1241                 mode =
1242                         (streq(args[0], "isolate") ||
1243                          streq(args[0], "rescue")  ||
1244                          streq(args[0], "emergency")) ? "isolate" :
1245                                              arg_fail ? "fail" :
1246                                                         "replace";
1247
1248                 one_name = table[verb_to_action(args[0])];
1249
1250         } else {
1251                 assert(arg_action < ELEMENTSOF(table));
1252                 assert(table[arg_action]);
1253
1254                 method = "StartUnit";
1255
1256                 mode = (arg_action == ACTION_EMERGENCY ||
1257                         arg_action == ACTION_RESCUE) ? "isolate" : "replace";
1258
1259                 one_name = table[arg_action];
1260         }
1261
1262         if (!arg_no_block) {
1263                 if ((ret = enable_wait_for_jobs(bus)) < 0) {
1264                         log_error("Could not watch jobs: %s", strerror(-ret));
1265                         goto finish;
1266                 }
1267
1268                 if (!(s = set_new(string_hash_func, string_compare_func))) {
1269                         log_error("Failed to allocate set.");
1270                         ret = -ENOMEM;
1271                         goto finish;
1272                 }
1273         }
1274
1275         if (one_name) {
1276                 if ((ret = start_unit_one(bus, method, one_name, mode, &error, s)) <= 0)
1277                         goto finish;
1278         } else {
1279                 for (i = 1; i < n; i++)
1280                         if ((r = start_unit_one(bus, method, args[i], mode, &error, s)) != 0) {
1281                                 ret = translate_bus_error_to_exit_status(r, &error);
1282                                 dbus_error_free(&error);
1283                         }
1284         }
1285
1286         if (!arg_no_block)
1287                 if ((r = wait_for_jobs(bus, s)) < 0) {
1288                         ret = r;
1289                         goto finish;
1290                 }
1291
1292 finish:
1293         if (s)
1294                 set_free_free(s);
1295
1296         dbus_error_free(&error);
1297
1298         return ret;
1299 }
1300
1301 static int start_special(DBusConnection *bus, char **args, unsigned n) {
1302         int r;
1303
1304         assert(bus);
1305         assert(args);
1306
1307         r = start_unit(bus, args, n);
1308
1309         if (r >= 0)
1310                 warn_wall(verb_to_action(args[0]));
1311
1312         return r;
1313 }
1314
1315 static int check_unit(DBusConnection *bus, char **args, unsigned n) {
1316         DBusMessage *m = NULL, *reply = NULL;
1317         const char
1318                 *interface = "org.freedesktop.systemd1.Unit",
1319                 *property = "ActiveState";
1320         int r = 3; /* According to LSB: "program is not running" */
1321         DBusError error;
1322         unsigned i;
1323
1324         assert(bus);
1325         assert(args);
1326
1327         dbus_error_init(&error);
1328
1329         for (i = 1; i < n; i++) {
1330                 const char *path = NULL;
1331                 const char *state;
1332                 DBusMessageIter iter, sub;
1333
1334                 if (!(m = dbus_message_new_method_call(
1335                                       "org.freedesktop.systemd1",
1336                                       "/org/freedesktop/systemd1",
1337                                       "org.freedesktop.systemd1.Manager",
1338                                       "GetUnit"))) {
1339                         log_error("Could not allocate message.");
1340                         r = -ENOMEM;
1341                         goto finish;
1342                 }
1343
1344                 if (!dbus_message_append_args(m,
1345                                               DBUS_TYPE_STRING, &args[i],
1346                                               DBUS_TYPE_INVALID)) {
1347                         log_error("Could not append arguments to message.");
1348                         r = -ENOMEM;
1349                         goto finish;
1350                 }
1351
1352                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1353
1354                         /* Hmm, cannot figure out anything about this unit... */
1355                         if (!arg_quiet)
1356                                 puts("unknown");
1357
1358                         dbus_error_free(&error);
1359                         continue;
1360                 }
1361
1362                 if (!dbus_message_get_args(reply, &error,
1363                                            DBUS_TYPE_OBJECT_PATH, &path,
1364                                            DBUS_TYPE_INVALID)) {
1365                         log_error("Failed to parse reply: %s", bus_error_message(&error));
1366                         r = -EIO;
1367                         goto finish;
1368                 }
1369
1370                 dbus_message_unref(m);
1371                 if (!(m = dbus_message_new_method_call(
1372                                       "org.freedesktop.systemd1",
1373                                       path,
1374                                       "org.freedesktop.DBus.Properties",
1375                                       "Get"))) {
1376                         log_error("Could not allocate message.");
1377                         r = -ENOMEM;
1378                         goto finish;
1379                 }
1380
1381                 if (!dbus_message_append_args(m,
1382                                               DBUS_TYPE_STRING, &interface,
1383                                               DBUS_TYPE_STRING, &property,
1384                                               DBUS_TYPE_INVALID)) {
1385                         log_error("Could not append arguments to message.");
1386                         r = -ENOMEM;
1387                         goto finish;
1388                 }
1389
1390                 dbus_message_unref(reply);
1391                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
1392                         log_error("Failed to issue method call: %s", bus_error_message(&error));
1393                         r = -EIO;
1394                         goto finish;
1395                 }
1396
1397                 if (!dbus_message_iter_init(reply, &iter) ||
1398                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
1399                         log_error("Failed to parse reply.");
1400                         r = -EIO;
1401                         goto finish;
1402                 }
1403
1404                 dbus_message_iter_recurse(&iter, &sub);
1405
1406                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
1407                         log_error("Failed to parse reply.");
1408                         r = -EIO;
1409                         goto finish;
1410                 }
1411
1412                 dbus_message_iter_get_basic(&sub, &state);
1413
1414                 if (!arg_quiet)
1415                         puts(state);
1416
1417                 if (streq(state, "active") || streq(state, "reloading"))
1418                         r = 0;
1419
1420                 dbus_message_unref(m);
1421                 dbus_message_unref(reply);
1422                 m = reply = NULL;
1423         }
1424
1425 finish:
1426         if (m)
1427                 dbus_message_unref(m);
1428
1429         if (reply)
1430                 dbus_message_unref(reply);
1431
1432         dbus_error_free(&error);
1433
1434         return r;
1435 }
1436
1437 typedef struct ExecStatusInfo {
1438         char *path;
1439         char **argv;
1440
1441         bool ignore;
1442
1443         usec_t start_timestamp;
1444         usec_t exit_timestamp;
1445         pid_t pid;
1446         int code;
1447         int status;
1448
1449         LIST_FIELDS(struct ExecStatusInfo, exec);
1450 } ExecStatusInfo;
1451
1452 static void exec_status_info_free(ExecStatusInfo *i) {
1453         assert(i);
1454
1455         free(i->path);
1456         strv_free(i->argv);
1457         free(i);
1458 }
1459
1460 static int exec_status_info_deserialize(DBusMessageIter *sub, ExecStatusInfo *i) {
1461         uint64_t start_timestamp, exit_timestamp;
1462         DBusMessageIter sub2, sub3;
1463         const char*path;
1464         unsigned n;
1465         uint32_t pid;
1466         int32_t code, status;
1467         dbus_bool_t ignore;
1468
1469         assert(i);
1470         assert(i);
1471
1472         if (dbus_message_iter_get_arg_type(sub) != DBUS_TYPE_STRUCT)
1473                 return -EIO;
1474
1475         dbus_message_iter_recurse(sub, &sub2);
1476
1477         if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, true) < 0)
1478                 return -EIO;
1479
1480         if (!(i->path = strdup(path)))
1481                 return -ENOMEM;
1482
1483         if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_ARRAY ||
1484             dbus_message_iter_get_element_type(&sub2) != DBUS_TYPE_STRING)
1485                 return -EIO;
1486
1487         n = 0;
1488         dbus_message_iter_recurse(&sub2, &sub3);
1489         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1490                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1491                 dbus_message_iter_next(&sub3);
1492                 n++;
1493         }
1494
1495
1496         if (!(i->argv = new0(char*, n+1)))
1497                 return -ENOMEM;
1498
1499         n = 0;
1500         dbus_message_iter_recurse(&sub2, &sub3);
1501         while (dbus_message_iter_get_arg_type(&sub3) != DBUS_TYPE_INVALID) {
1502                 const char *s;
1503
1504                 assert(dbus_message_iter_get_arg_type(&sub3) == DBUS_TYPE_STRING);
1505                 dbus_message_iter_get_basic(&sub3, &s);
1506                 dbus_message_iter_next(&sub3);
1507
1508                 if (!(i->argv[n++] = strdup(s)))
1509                         return -ENOMEM;
1510         }
1511
1512         if (!dbus_message_iter_next(&sub2) ||
1513             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_BOOLEAN, &ignore, true) < 0 ||
1514             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &start_timestamp, true) < 0 ||
1515             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &exit_timestamp, true) < 0 ||
1516             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, true) < 0 ||
1517             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &code, true) < 0 ||
1518             bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_INT32, &status, false) < 0)
1519                 return -EIO;
1520
1521         i->ignore = ignore;
1522         i->start_timestamp = (usec_t) start_timestamp;
1523         i->exit_timestamp = (usec_t) exit_timestamp;
1524         i->pid = (pid_t) pid;
1525         i->code = code;
1526         i->status = status;
1527
1528         return 0;
1529 }
1530
1531 typedef struct UnitStatusInfo {
1532         const char *id;
1533         const char *load_state;
1534         const char *active_state;
1535         const char *sub_state;
1536
1537         const char *description;
1538
1539         const char *path;
1540         const char *default_control_group;
1541
1542         usec_t inactive_exit_timestamp;
1543         usec_t active_enter_timestamp;
1544         usec_t active_exit_timestamp;
1545         usec_t inactive_enter_timestamp;
1546
1547         bool need_daemon_reload;
1548
1549         /* Service */
1550         pid_t main_pid;
1551         pid_t control_pid;
1552         const char *status_text;
1553         bool running:1;
1554         bool is_sysv:1;
1555
1556         usec_t start_timestamp;
1557         usec_t exit_timestamp;
1558
1559         int exit_code, exit_status;
1560
1561         /* Socket */
1562         unsigned n_accepted;
1563         unsigned n_connections;
1564         bool accept;
1565
1566         /* Device */
1567         const char *sysfs_path;
1568
1569         /* Mount, Automount */
1570         const char *where;
1571
1572         /* Swap */
1573         const char *what;
1574
1575         LIST_HEAD(ExecStatusInfo, exec);
1576 } UnitStatusInfo;
1577
1578 static void print_status_info(UnitStatusInfo *i) {
1579         ExecStatusInfo *p;
1580         const char *on, *off, *ss;
1581         usec_t timestamp;
1582         char since1[FORMAT_TIMESTAMP_PRETTY_MAX], *s1;
1583         char since2[FORMAT_TIMESTAMP_MAX], *s2;
1584
1585         assert(i);
1586
1587         /* This shows pretty information about a unit. See
1588          * print_property() for a low-level property printer */
1589
1590         printf("%s", strna(i->id));
1591
1592         if (i->description && !streq_ptr(i->id, i->description))
1593                 printf(" - %s", i->description);
1594
1595         printf("\n");
1596
1597         if (streq_ptr(i->load_state, "failed")) {
1598                 on = ansi_highlight(true);
1599                 off = ansi_highlight(false);
1600         } else
1601                 on = off = "";
1602
1603         if (i->path)
1604                 printf("\t  Loaded: %s%s%s (%s)\n", on, strna(i->load_state), off, i->path);
1605         else
1606                 printf("\t  Loaded: %s%s%s\n", on, strna(i->load_state), off);
1607
1608         ss = streq_ptr(i->active_state, i->sub_state) ? NULL : i->sub_state;
1609
1610         if (streq_ptr(i->active_state, "failed")) {
1611                 on = ansi_highlight(true);
1612                 off = ansi_highlight(false);
1613         } else if (streq_ptr(i->active_state, "active") || streq_ptr(i->active_state, "reloading")) {
1614                 on = ansi_highlight_green(true);
1615                 off = ansi_highlight_green(false);
1616         } else
1617                 on = off = "";
1618
1619         if (ss)
1620                 printf("\t  Active: %s%s (%s)%s",
1621                        on,
1622                        strna(i->active_state),
1623                        ss,
1624                        off);
1625         else
1626                 printf("\t  Active: %s%s%s",
1627                        on,
1628                        strna(i->active_state),
1629                        off);
1630
1631         timestamp = (streq_ptr(i->active_state, "active")      ||
1632                      streq_ptr(i->active_state, "reloading"))   ? i->active_enter_timestamp :
1633                     (streq_ptr(i->active_state, "inactive")    ||
1634                      streq_ptr(i->active_state, "failed"))      ? i->inactive_enter_timestamp :
1635                     streq_ptr(i->active_state, "activating")    ? i->inactive_exit_timestamp :
1636                                                                   i->active_exit_timestamp;
1637
1638         s1 = format_timestamp_pretty(since1, sizeof(since1), timestamp);
1639         s2 = format_timestamp(since2, sizeof(since2), timestamp);
1640
1641         if (s1)
1642                 printf(" since [%s; %s]\n", s2, s1);
1643         else if (s2)
1644                 printf(" since [%s]\n", s2);
1645         else
1646                 printf("\n");
1647
1648         if (i->sysfs_path)
1649                 printf("\t  Device: %s\n", i->sysfs_path);
1650         else if (i->where)
1651                 printf("\t   Where: %s\n", i->where);
1652         else if (i->what)
1653                 printf("\t    What: %s\n", i->what);
1654
1655         if (i->accept)
1656                 printf("\tAccepted: %u; Connected: %u\n", i->n_accepted, i->n_connections);
1657
1658         LIST_FOREACH(exec, p, i->exec) {
1659                 char *t;
1660
1661                 /* Only show exited processes here */
1662                 if (p->code == 0)
1663                         continue;
1664
1665                 t = strv_join(p->argv, " ");
1666                 printf("\t Process: %u (%s, code=%s, ", p->pid, strna(t), sigchld_code_to_string(p->code));
1667                 free(t);
1668
1669                 if (p->code == CLD_EXITED) {
1670                         const char *c;
1671
1672                         printf("status=%i", p->status);
1673
1674                         if ((c = exit_status_to_string(p->status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
1675                                 printf("/%s", c);
1676
1677                 } else
1678                         printf("signal=%s", signal_to_string(p->status));
1679                 printf(")\n");
1680
1681                 if (i->main_pid == p->pid &&
1682                     i->start_timestamp == p->start_timestamp &&
1683                     i->exit_timestamp == p->start_timestamp)
1684                         /* Let's not show this twice */
1685                         i->main_pid = 0;
1686
1687                 if (p->pid == i->control_pid)
1688                         i->control_pid = 0;
1689         }
1690
1691         if (i->main_pid > 0 || i->control_pid > 0) {
1692                 printf("\t");
1693
1694                 if (i->main_pid > 0) {
1695                         printf("Main PID: %u", (unsigned) i->main_pid);
1696
1697                         if (i->running) {
1698                                 char *t = NULL;
1699                                 get_process_name(i->main_pid, &t);
1700                                 if (t) {
1701                                         printf(" (%s)", t);
1702                                         free(t);
1703                                 }
1704                         } else if (i->exit_code > 0) {
1705                                 printf(" (code=%s, ", sigchld_code_to_string(i->exit_code));
1706
1707                                 if (i->exit_code == CLD_EXITED) {
1708                                         const char *c;
1709
1710                                         printf("status=%i", i->exit_status);
1711
1712                                         if ((c = exit_status_to_string(i->exit_status, i->is_sysv ? EXIT_STATUS_LSB : EXIT_STATUS_SYSTEMD)))
1713                                                 printf("/%s", c);
1714
1715                                 } else
1716                                         printf("signal=%s", signal_to_string(i->exit_status));
1717                                 printf(")");
1718                         }
1719                 }
1720
1721                 if (i->main_pid > 0 && i->control_pid > 0)
1722                         printf(";");
1723
1724                 if (i->control_pid > 0) {
1725                         char *t = NULL;
1726
1727                         printf(" Control: %u", (unsigned) i->control_pid);
1728
1729                         get_process_name(i->control_pid, &t);
1730                         if (t) {
1731                                 printf(" (%s)", t);
1732                                 free(t);
1733                         }
1734                 }
1735
1736                 printf("\n");
1737         }
1738
1739         if (i->status_text)
1740                 printf("\t  Status: \"%s\"\n", i->status_text);
1741
1742         if (i->default_control_group) {
1743                 unsigned c;
1744
1745                 printf("\t  CGroup: %s\n", i->default_control_group);
1746
1747                 if ((c = columns()) > 18)
1748                         c -= 18;
1749                 else
1750                         c = 0;
1751
1752                 show_cgroup_by_path(i->default_control_group, "\t\t  ", c);
1753         }
1754
1755         if (i->need_daemon_reload)
1756                 printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %s daemon-reload' recommended.\n",
1757                        ansi_highlight(true),
1758                        ansi_highlight(false),
1759                        arg_session ? "--session" : "--system");
1760 }
1761
1762 static int status_property(const char *name, DBusMessageIter *iter, UnitStatusInfo *i) {
1763
1764         switch (dbus_message_iter_get_arg_type(iter)) {
1765
1766         case DBUS_TYPE_STRING: {
1767                 const char *s;
1768
1769                 dbus_message_iter_get_basic(iter, &s);
1770
1771                 if (s[0]) {
1772                         if (streq(name, "Id"))
1773                                 i->id = s;
1774                         else if (streq(name, "LoadState"))
1775                                 i->load_state = s;
1776                         else if (streq(name, "ActiveState"))
1777                                 i->active_state = s;
1778                         else if (streq(name, "SubState"))
1779                                 i->sub_state = s;
1780                         else if (streq(name, "Description"))
1781                                 i->description = s;
1782                         else if (streq(name, "FragmentPath"))
1783                                 i->path = s;
1784                         else if (streq(name, "SysVPath")) {
1785                                 i->is_sysv = true;
1786                                 i->path = s;
1787                         } else if (streq(name, "DefaultControlGroup"))
1788                                 i->default_control_group = s;
1789                         else if (streq(name, "StatusText"))
1790                                 i->status_text = s;
1791                         else if (streq(name, "SysFSPath"))
1792                                 i->sysfs_path = s;
1793                         else if (streq(name, "Where"))
1794                                 i->where = s;
1795                         else if (streq(name, "What"))
1796                                 i->what = s;
1797                 }
1798
1799                 break;
1800         }
1801
1802         case DBUS_TYPE_BOOLEAN: {
1803                 dbus_bool_t b;
1804
1805                 dbus_message_iter_get_basic(iter, &b);
1806
1807                 if (streq(name, "Accept"))
1808                         i->accept = b;
1809                 else if (streq(name, "NeedDaemonReload"))
1810                         i->need_daemon_reload = b;
1811
1812                 break;
1813         }
1814
1815         case DBUS_TYPE_UINT32: {
1816                 uint32_t u;
1817
1818                 dbus_message_iter_get_basic(iter, &u);
1819
1820                 if (streq(name, "MainPID")) {
1821                         if (u > 0) {
1822                                 i->main_pid = (pid_t) u;
1823                                 i->running = true;
1824                         }
1825                 } else if (streq(name, "ControlPID"))
1826                         i->control_pid = (pid_t) u;
1827                 else if (streq(name, "ExecMainPID")) {
1828                         if (u > 0)
1829                                 i->main_pid = (pid_t) u;
1830                 } else if (streq(name, "NAccepted"))
1831                         i->n_accepted = u;
1832                 else if (streq(name, "NConnections"))
1833                         i->n_connections = u;
1834
1835                 break;
1836         }
1837
1838         case DBUS_TYPE_INT32: {
1839                 int32_t j;
1840
1841                 dbus_message_iter_get_basic(iter, &j);
1842
1843                 if (streq(name, "ExecMainCode"))
1844                         i->exit_code = (int) j;
1845                 else if (streq(name, "ExecMainStatus"))
1846                         i->exit_status = (int) j;
1847
1848                 break;
1849         }
1850
1851         case DBUS_TYPE_UINT64: {
1852                 uint64_t u;
1853
1854                 dbus_message_iter_get_basic(iter, &u);
1855
1856                 if (streq(name, "ExecMainStartTimestamp"))
1857                         i->start_timestamp = (usec_t) u;
1858                 else if (streq(name, "ExecMainExitTimestamp"))
1859                         i->exit_timestamp = (usec_t) u;
1860                 else if (streq(name, "ActiveEnterTimestamp"))
1861                         i->active_enter_timestamp = (usec_t) u;
1862                 else if (streq(name, "InactiveEnterTimestamp"))
1863                         i->inactive_enter_timestamp = (usec_t) u;
1864                 else if (streq(name, "InactiveExitTimestamp"))
1865                         i->inactive_exit_timestamp = (usec_t) u;
1866                 else if (streq(name, "ActiveExitTimestamp"))
1867                         i->active_exit_timestamp = (usec_t) u;
1868
1869                 break;
1870         }
1871
1872         case DBUS_TYPE_ARRAY: {
1873
1874                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT &&
1875                     startswith(name, "Exec")) {
1876                         DBusMessageIter sub;
1877
1878                         dbus_message_iter_recurse(iter, &sub);
1879                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
1880                                 ExecStatusInfo *info;
1881                                 int r;
1882
1883                                 if (!(info = new0(ExecStatusInfo, 1)))
1884                                         return -ENOMEM;
1885
1886                                 if ((r = exec_status_info_deserialize(&sub, info)) < 0) {
1887                                         free(info);
1888                                         return r;
1889                                 }
1890
1891                                 LIST_PREPEND(ExecStatusInfo, exec, i->exec, info);
1892
1893                                 dbus_message_iter_next(&sub);
1894                         }
1895                 }
1896
1897                 break;
1898         }
1899         }
1900
1901         return 0;
1902 }
1903
1904 static int print_property(const char *name, DBusMessageIter *iter) {
1905         assert(name);
1906         assert(iter);
1907
1908         /* This is a low-level property printer, see
1909          * print_status_info() for the nicer output */
1910
1911         if (arg_property && !strv_find(arg_property, name))
1912                 return 0;
1913
1914         switch (dbus_message_iter_get_arg_type(iter)) {
1915
1916         case DBUS_TYPE_STRING: {
1917                 const char *s;
1918                 dbus_message_iter_get_basic(iter, &s);
1919
1920                 if (arg_all || s[0])
1921                         printf("%s=%s\n", name, s);
1922
1923                 return 0;
1924         }
1925
1926         case DBUS_TYPE_BOOLEAN: {
1927                 dbus_bool_t b;
1928                 dbus_message_iter_get_basic(iter, &b);
1929                 printf("%s=%s\n", name, yes_no(b));
1930
1931                 return 0;
1932         }
1933
1934         case DBUS_TYPE_UINT64: {
1935                 uint64_t u;
1936                 dbus_message_iter_get_basic(iter, &u);
1937
1938                 /* Yes, heuristics! But we can change this check
1939                  * should it turn out to not be sufficient */
1940
1941                 if (strstr(name, "Timestamp")) {
1942                         char timestamp[FORMAT_TIMESTAMP_MAX], *t;
1943
1944                         if ((t = format_timestamp(timestamp, sizeof(timestamp), u)) || arg_all)
1945                                 printf("%s=%s\n", name, strempty(t));
1946                 } else if (strstr(name, "USec")) {
1947                         char timespan[FORMAT_TIMESPAN_MAX];
1948
1949                         printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u));
1950                 } else
1951                         printf("%s=%llu\n", name, (unsigned long long) u);
1952
1953                 return 0;
1954         }
1955
1956         case DBUS_TYPE_UINT32: {
1957                 uint32_t u;
1958                 dbus_message_iter_get_basic(iter, &u);
1959
1960                 if (strstr(name, "UMask") || strstr(name, "Mode"))
1961                         printf("%s=%04o\n", name, u);
1962                 else
1963                         printf("%s=%u\n", name, (unsigned) u);
1964
1965                 return 0;
1966         }
1967
1968         case DBUS_TYPE_INT32: {
1969                 int32_t i;
1970                 dbus_message_iter_get_basic(iter, &i);
1971
1972                 printf("%s=%i\n", name, (int) i);
1973                 return 0;
1974         }
1975
1976         case DBUS_TYPE_STRUCT: {
1977                 DBusMessageIter sub;
1978                 dbus_message_iter_recurse(iter, &sub);
1979
1980                 if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_UINT32 && streq(name, "Job")) {
1981                         uint32_t u;
1982
1983                         dbus_message_iter_get_basic(&sub, &u);
1984
1985                         if (u)
1986                                 printf("%s=%u\n", name, (unsigned) u);
1987                         else if (arg_all)
1988                                 printf("%s=\n", name);
1989
1990                         return 0;
1991                 } else if (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING && streq(name, "Unit")) {
1992                         const char *s;
1993
1994                         dbus_message_iter_get_basic(&sub, &s);
1995
1996                         if (arg_all || s[0])
1997                                 printf("%s=%s\n", name, s);
1998
1999                         return 0;
2000                 }
2001
2002                 break;
2003         }
2004
2005         case DBUS_TYPE_ARRAY:
2006
2007                 if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) {
2008                         DBusMessageIter sub;
2009                         bool space = false;
2010
2011                         dbus_message_iter_recurse(iter, &sub);
2012                         if (arg_all ||
2013                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2014                                 printf("%s=", name);
2015
2016                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2017                                         const char *s;
2018
2019                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING);
2020                                         dbus_message_iter_get_basic(&sub, &s);
2021                                         printf("%s%s", space ? " " : "", s);
2022
2023                                         space = true;
2024                                         dbus_message_iter_next(&sub);
2025                                 }
2026
2027                                 puts("");
2028                         }
2029
2030                         return 0;
2031
2032                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) {
2033                         DBusMessageIter sub;
2034
2035                         dbus_message_iter_recurse(iter, &sub);
2036                         if (arg_all ||
2037                             dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2038                                 printf("%s=", name);
2039
2040                                 while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2041                                         uint8_t u;
2042
2043                                         assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE);
2044                                         dbus_message_iter_get_basic(&sub, &u);
2045                                         printf("%02x", u);
2046
2047                                         dbus_message_iter_next(&sub);
2048                                 }
2049
2050                                 puts("");
2051                         }
2052
2053                         return 0;
2054
2055                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Paths")) {
2056                         DBusMessageIter sub, sub2;
2057
2058                         dbus_message_iter_recurse(iter, &sub);
2059                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2060                                 const char *type, *path;
2061
2062                                 dbus_message_iter_recurse(&sub, &sub2);
2063
2064                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &type, true) >= 0 &&
2065                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &path, false) >= 0)
2066                                         printf("%s=%s\n", type, path);
2067
2068                                 dbus_message_iter_next(&sub);
2069                         }
2070
2071                         return 0;
2072
2073                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && streq(name, "Timers")) {
2074                         DBusMessageIter sub, sub2;
2075
2076                         dbus_message_iter_recurse(iter, &sub);
2077                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2078                                 const char *base;
2079                                 uint64_t value, next_elapse;
2080
2081                                 dbus_message_iter_recurse(&sub, &sub2);
2082
2083                                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &base, true) >= 0 &&
2084                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &value, true) >= 0 &&
2085                                     bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT64, &next_elapse, false) >= 0) {
2086                                         char timespan1[FORMAT_TIMESPAN_MAX], timespan2[FORMAT_TIMESPAN_MAX];
2087
2088                                         printf("%s={ value=%s ; next_elapse=%s }\n",
2089                                                base,
2090                                                format_timespan(timespan1, sizeof(timespan1), value),
2091                                                format_timespan(timespan2, sizeof(timespan2), next_elapse));
2092                                 }
2093
2094                                 dbus_message_iter_next(&sub);
2095                         }
2096
2097                         return 0;
2098
2099                 } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRUCT && startswith(name, "Exec")) {
2100                         DBusMessageIter sub;
2101
2102                         dbus_message_iter_recurse(iter, &sub);
2103                         while (dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRUCT) {
2104                                 ExecStatusInfo info;
2105
2106                                 zero(info);
2107                                 if (exec_status_info_deserialize(&sub, &info) >= 0) {
2108                                         char timestamp1[FORMAT_TIMESTAMP_MAX], timestamp2[FORMAT_TIMESTAMP_MAX];
2109                                         char *t;
2110
2111                                         t = strv_join(info.argv, " ");
2112
2113                                         printf("%s={ path=%s ; argv[]=%s ; ignore=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
2114                                                name,
2115                                                strna(info.path),
2116                                                strna(t),
2117                                                yes_no(info.ignore),
2118                                                strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
2119                                                strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
2120                                                (unsigned) info. pid,
2121                                                sigchld_code_to_string(info.code),
2122                                                info.status,
2123                                                info.code == CLD_EXITED ? "" : "/",
2124                                                strempty(info.code == CLD_EXITED ? NULL : signal_to_string(info.status)));
2125
2126                                         free(t);
2127                                 }
2128
2129                                 free(info.path);
2130                                 strv_free(info.argv);
2131
2132                                 dbus_message_iter_next(&sub);
2133                         }
2134
2135                         return 0;
2136                 }
2137
2138                 break;
2139         }
2140
2141         if (arg_all)
2142                 printf("%s=[unprintable]\n", name);
2143
2144         return 0;
2145 }
2146
2147 static int show_one(DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
2148         DBusMessage *m = NULL, *reply = NULL;
2149         const char *interface = "";
2150         int r;
2151         DBusError error;
2152         DBusMessageIter iter, sub, sub2, sub3;
2153         UnitStatusInfo info;
2154         ExecStatusInfo *p;
2155
2156         assert(bus);
2157         assert(path);
2158         assert(new_line);
2159
2160         zero(info);
2161         dbus_error_init(&error);
2162
2163         if (!(m = dbus_message_new_method_call(
2164                               "org.freedesktop.systemd1",
2165                               path,
2166                               "org.freedesktop.DBus.Properties",
2167                               "GetAll"))) {
2168                 log_error("Could not allocate message.");
2169                 r = -ENOMEM;
2170                 goto finish;
2171         }
2172
2173         if (!dbus_message_append_args(m,
2174                                       DBUS_TYPE_STRING, &interface,
2175                                       DBUS_TYPE_INVALID)) {
2176                 log_error("Could not append arguments to message.");
2177                 r = -ENOMEM;
2178                 goto finish;
2179         }
2180
2181         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2182                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2183                 r = -EIO;
2184                 goto finish;
2185         }
2186
2187         if (!dbus_message_iter_init(reply, &iter) ||
2188             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
2189             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
2190                 log_error("Failed to parse reply.");
2191                 r = -EIO;
2192                 goto finish;
2193         }
2194
2195         dbus_message_iter_recurse(&iter, &sub);
2196
2197         if (*new_line)
2198                 printf("\n");
2199
2200         *new_line = true;
2201
2202         while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
2203                 const char *name;
2204
2205                 if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
2206                         log_error("Failed to parse reply.");
2207                         r = -EIO;
2208                         goto finish;
2209                 }
2210
2211                 dbus_message_iter_recurse(&sub, &sub2);
2212
2213                 if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
2214                         log_error("Failed to parse reply.");
2215                         r = -EIO;
2216                         goto finish;
2217                 }
2218
2219                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
2220                         log_error("Failed to parse reply.");
2221                         r = -EIO;
2222                         goto finish;
2223                 }
2224
2225                 dbus_message_iter_recurse(&sub2, &sub3);
2226
2227                 if (show_properties)
2228                         r = print_property(name, &sub3);
2229                 else
2230                         r = status_property(name, &sub3, &info);
2231
2232                 if (r < 0) {
2233                         log_error("Failed to parse reply.");
2234                         r = -EIO;
2235                         goto finish;
2236                 }
2237
2238                 dbus_message_iter_next(&sub);
2239         }
2240
2241         r = 0;
2242
2243         if (!show_properties)
2244                 print_status_info(&info);
2245
2246         if (!streq_ptr(info.active_state, "active") &&
2247             !streq_ptr(info.active_state, "reloading"))
2248                 /* According to LSB: "program not running" */
2249                 r = 3;
2250
2251         while ((p = info.exec)) {
2252                 LIST_REMOVE(ExecStatusInfo, exec, info.exec, p);
2253                 exec_status_info_free(p);
2254         }
2255
2256 finish:
2257         if (m)
2258                 dbus_message_unref(m);
2259
2260         if (reply)
2261                 dbus_message_unref(reply);
2262
2263         dbus_error_free(&error);
2264
2265         return r;
2266 }
2267
2268 static int show(DBusConnection *bus, char **args, unsigned n) {
2269         DBusMessage *m = NULL, *reply = NULL;
2270         int r, ret = 0;
2271         DBusError error;
2272         unsigned i;
2273         bool show_properties, new_line = false;
2274
2275         assert(bus);
2276         assert(args);
2277
2278         dbus_error_init(&error);
2279
2280         show_properties = !streq(args[0], "status");
2281
2282         if (show_properties && n <= 1) {
2283                 /* If not argument is specified inspect the manager
2284                  * itself */
2285
2286                 ret = show_one(bus, "/org/freedesktop/systemd1", show_properties, &new_line);
2287                 goto finish;
2288         }
2289
2290         for (i = 1; i < n; i++) {
2291                 const char *path = NULL;
2292                 uint32_t id;
2293
2294                 if (safe_atou32(args[i], &id) < 0) {
2295
2296                         /* Interpret as unit name */
2297
2298                         if (!(m = dbus_message_new_method_call(
2299                                               "org.freedesktop.systemd1",
2300                                               "/org/freedesktop/systemd1",
2301                                               "org.freedesktop.systemd1.Manager",
2302                                               "LoadUnit"))) {
2303                                 log_error("Could not allocate message.");
2304                                 ret = -ENOMEM;
2305                                 goto finish;
2306                         }
2307
2308                         if (!dbus_message_append_args(m,
2309                                                       DBUS_TYPE_STRING, &args[i],
2310                                                       DBUS_TYPE_INVALID)) {
2311                                 log_error("Could not append arguments to message.");
2312                                 ret = -ENOMEM;
2313                                 goto finish;
2314                         }
2315
2316                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2317
2318                                 if (!dbus_error_has_name(&error, DBUS_ERROR_ACCESS_DENIED)) {
2319                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2320                                         ret = -EIO;
2321                                         goto finish;
2322                                 }
2323
2324                                 dbus_error_free(&error);
2325
2326                                 dbus_message_unref(m);
2327                                 if (!(m = dbus_message_new_method_call(
2328                                                       "org.freedesktop.systemd1",
2329                                                       "/org/freedesktop/systemd1",
2330                                                       "org.freedesktop.systemd1.Manager",
2331                                                       "GetUnit"))) {
2332                                         log_error("Could not allocate message.");
2333                                         ret = -ENOMEM;
2334                                         goto finish;
2335                                 }
2336
2337                                 if (!dbus_message_append_args(m,
2338                                                               DBUS_TYPE_STRING, &args[i],
2339                                                               DBUS_TYPE_INVALID)) {
2340                                         log_error("Could not append arguments to message.");
2341                                         ret = -ENOMEM;
2342                                         goto finish;
2343                                 }
2344
2345                                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2346                                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2347
2348                                         if (dbus_error_has_name(&error, BUS_ERROR_NO_SUCH_UNIT))
2349                                                 ret = 4; /* According to LSB: "program or service status is unknown" */
2350                                         else
2351                                                 ret = -EIO;
2352                                         goto finish;
2353                                 }
2354                         }
2355
2356                 } else if (show_properties) {
2357
2358                         /* Interpret as job id */
2359
2360                         if (!(m = dbus_message_new_method_call(
2361                                               "org.freedesktop.systemd1",
2362                                               "/org/freedesktop/systemd1",
2363                                               "org.freedesktop.systemd1.Manager",
2364                                               "GetJob"))) {
2365                                 log_error("Could not allocate message.");
2366                                 ret = -ENOMEM;
2367                                 goto finish;
2368                         }
2369
2370                         if (!dbus_message_append_args(m,
2371                                                       DBUS_TYPE_UINT32, &id,
2372                                                       DBUS_TYPE_INVALID)) {
2373                                 log_error("Could not append arguments to message.");
2374                                 ret = -ENOMEM;
2375                                 goto finish;
2376                         }
2377
2378                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2379                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2380                                 ret = -EIO;
2381                                 goto finish;
2382                         }
2383                 } else {
2384
2385                         /* Interpret as PID */
2386
2387                         if (!(m = dbus_message_new_method_call(
2388                                               "org.freedesktop.systemd1",
2389                                               "/org/freedesktop/systemd1",
2390                                               "org.freedesktop.systemd1.Manager",
2391                                               "GetUnitByPID"))) {
2392                                 log_error("Could not allocate message.");
2393                                 ret = -ENOMEM;
2394                                 goto finish;
2395                         }
2396
2397                         if (!dbus_message_append_args(m,
2398                                                       DBUS_TYPE_UINT32, &id,
2399                                                       DBUS_TYPE_INVALID)) {
2400                                 log_error("Could not append arguments to message.");
2401                                 ret = -ENOMEM;
2402                                 goto finish;
2403                         }
2404
2405                         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2406                                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2407                                 ret = -EIO;
2408                                 goto finish;
2409                         }
2410                 }
2411
2412                 if (!dbus_message_get_args(reply, &error,
2413                                            DBUS_TYPE_OBJECT_PATH, &path,
2414                                            DBUS_TYPE_INVALID)) {
2415                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2416                         ret = -EIO;
2417                         goto finish;
2418                 }
2419
2420                 if ((r = show_one(bus, path, show_properties, &new_line)) != 0)
2421                         ret = r;
2422
2423                 dbus_message_unref(m);
2424                 dbus_message_unref(reply);
2425                 m = reply = NULL;
2426         }
2427
2428 finish:
2429         if (m)
2430                 dbus_message_unref(m);
2431
2432         if (reply)
2433                 dbus_message_unref(reply);
2434
2435         dbus_error_free(&error);
2436
2437         return ret;
2438 }
2439
2440 static DBusHandlerResult monitor_filter(DBusConnection *connection, DBusMessage *message, void *data) {
2441         DBusError error;
2442         DBusMessage *m = NULL, *reply = NULL;
2443
2444         assert(connection);
2445         assert(message);
2446
2447         dbus_error_init(&error);
2448
2449         log_debug("Got D-Bus request: %s.%s() on %s",
2450                   dbus_message_get_interface(message),
2451                   dbus_message_get_member(message),
2452                   dbus_message_get_path(message));
2453
2454         if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) {
2455                 log_error("Warning! D-Bus connection terminated.");
2456                 dbus_connection_close(connection);
2457
2458         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitNew") ||
2459                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "UnitRemoved")) {
2460                 const char *id, *path;
2461
2462                 if (!dbus_message_get_args(message, &error,
2463                                            DBUS_TYPE_STRING, &id,
2464                                            DBUS_TYPE_OBJECT_PATH, &path,
2465                                            DBUS_TYPE_INVALID))
2466                         log_error("Failed to parse message: %s", bus_error_message(&error));
2467                 else if (streq(dbus_message_get_member(message), "UnitNew"))
2468                         printf("Unit %s added.\n", id);
2469                 else
2470                         printf("Unit %s removed.\n", id);
2471
2472         } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobNew") ||
2473                    dbus_message_is_signal(message, "org.freedesktop.systemd1.Manager", "JobRemoved")) {
2474                 uint32_t id;
2475                 const char *path;
2476
2477                 if (!dbus_message_get_args(message, &error,
2478                                            DBUS_TYPE_UINT32, &id,
2479                                            DBUS_TYPE_OBJECT_PATH, &path,
2480                                            DBUS_TYPE_INVALID))
2481                         log_error("Failed to parse message: %s", bus_error_message(&error));
2482                 else if (streq(dbus_message_get_member(message), "JobNew"))
2483                         printf("Job %u added.\n", id);
2484                 else
2485                         printf("Job %u removed.\n", id);
2486
2487
2488         } else if (dbus_message_is_signal(message, "org.freedesktop.DBus.Properties", "PropertiesChanged")) {
2489
2490                 const char *path, *interface, *property = "Id";
2491                 DBusMessageIter iter, sub;
2492
2493                 path = dbus_message_get_path(message);
2494
2495                 if (!dbus_message_get_args(message, &error,
2496                                           DBUS_TYPE_STRING, &interface,
2497                                           DBUS_TYPE_INVALID)) {
2498                         log_error("Failed to parse message: %s", bus_error_message(&error));
2499                         goto finish;
2500                 }
2501
2502                 if (!streq(interface, "org.freedesktop.systemd1.Job") &&
2503                     !streq(interface, "org.freedesktop.systemd1.Unit"))
2504                         goto finish;
2505
2506                 if (!(m = dbus_message_new_method_call(
2507                               "org.freedesktop.systemd1",
2508                               path,
2509                               "org.freedesktop.DBus.Properties",
2510                               "Get"))) {
2511                         log_error("Could not allocate message.");
2512                         goto oom;
2513                 }
2514
2515                 if (!dbus_message_append_args(m,
2516                                               DBUS_TYPE_STRING, &interface,
2517                                               DBUS_TYPE_STRING, &property,
2518                                               DBUS_TYPE_INVALID)) {
2519                         log_error("Could not append arguments to message.");
2520                         goto finish;
2521                 }
2522
2523                 if (!(reply = dbus_connection_send_with_reply_and_block(connection, m, -1, &error))) {
2524                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2525                         goto finish;
2526                 }
2527
2528                 if (!dbus_message_iter_init(reply, &iter) ||
2529                     dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2530                         log_error("Failed to parse reply.");
2531                         goto finish;
2532                 }
2533
2534                 dbus_message_iter_recurse(&iter, &sub);
2535
2536                 if (streq(interface, "org.freedesktop.systemd1.Unit")) {
2537                         const char *id;
2538
2539                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2540                                 log_error("Failed to parse reply.");
2541                                 goto finish;
2542                         }
2543
2544                         dbus_message_iter_get_basic(&sub, &id);
2545                         printf("Unit %s changed.\n", id);
2546                 } else {
2547                         uint32_t id;
2548
2549                         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT32)  {
2550                                 log_error("Failed to parse reply.");
2551                                 goto finish;
2552                         }
2553
2554                         dbus_message_iter_get_basic(&sub, &id);
2555                         printf("Job %u changed.\n", id);
2556                 }
2557         }
2558
2559 finish:
2560         if (m)
2561                 dbus_message_unref(m);
2562
2563         if (reply)
2564                 dbus_message_unref(reply);
2565
2566         dbus_error_free(&error);
2567         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
2568
2569 oom:
2570         if (m)
2571                 dbus_message_unref(m);
2572
2573         if (reply)
2574                 dbus_message_unref(reply);
2575
2576         dbus_error_free(&error);
2577         return DBUS_HANDLER_RESULT_NEED_MEMORY;
2578 }
2579
2580 static int monitor(DBusConnection *bus, char **args, unsigned n) {
2581         DBusMessage *m = NULL, *reply = NULL;
2582         DBusError error;
2583         int r;
2584
2585         dbus_error_init(&error);
2586
2587         if (!private_bus) {
2588                 dbus_bus_add_match(bus,
2589                                    "type='signal',"
2590                                    "sender='org.freedesktop.systemd1',"
2591                                    "interface='org.freedesktop.systemd1.Manager',"
2592                                    "path='/org/freedesktop/systemd1'",
2593                                    &error);
2594
2595                 if (dbus_error_is_set(&error)) {
2596                         log_error("Failed to add match: %s", bus_error_message(&error));
2597                         r = -EIO;
2598                         goto finish;
2599                 }
2600
2601                 dbus_bus_add_match(bus,
2602                                    "type='signal',"
2603                                    "sender='org.freedesktop.systemd1',"
2604                                    "interface='org.freedesktop.DBus.Properties',"
2605                                    "member='PropertiesChanged'",
2606                                    &error);
2607
2608                 if (dbus_error_is_set(&error)) {
2609                         log_error("Failed to add match: %s", bus_error_message(&error));
2610                         r = -EIO;
2611                         goto finish;
2612                 }
2613         }
2614
2615         if (!dbus_connection_add_filter(bus, monitor_filter, NULL, NULL)) {
2616                 log_error("Failed to add filter.");
2617                 r = -ENOMEM;
2618                 goto finish;
2619         }
2620
2621         if (!(m = dbus_message_new_method_call(
2622                               "org.freedesktop.systemd1",
2623                               "/org/freedesktop/systemd1",
2624                               "org.freedesktop.systemd1.Manager",
2625                               "Subscribe"))) {
2626                 log_error("Could not allocate message.");
2627                 r = -ENOMEM;
2628                 goto finish;
2629         }
2630
2631         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2632                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2633                 r = -EIO;
2634                 goto finish;
2635         }
2636
2637         while (dbus_connection_read_write_dispatch(bus, -1))
2638                 ;
2639
2640         r = 0;
2641
2642 finish:
2643
2644         /* This is slightly dirty, since we don't undo the filter or the matches. */
2645
2646         if (m)
2647                 dbus_message_unref(m);
2648
2649         if (reply)
2650                 dbus_message_unref(reply);
2651
2652         dbus_error_free(&error);
2653
2654         return r;
2655 }
2656
2657 static int dump(DBusConnection *bus, char **args, unsigned n) {
2658         DBusMessage *m = NULL, *reply = NULL;
2659         DBusError error;
2660         int r;
2661         const char *text;
2662
2663         dbus_error_init(&error);
2664
2665         if (!(m = dbus_message_new_method_call(
2666                               "org.freedesktop.systemd1",
2667                               "/org/freedesktop/systemd1",
2668                               "org.freedesktop.systemd1.Manager",
2669                               "Dump"))) {
2670                 log_error("Could not allocate message.");
2671                 return -ENOMEM;
2672         }
2673
2674         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2675                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2676                 r = -EIO;
2677                 goto finish;
2678         }
2679
2680         if (!dbus_message_get_args(reply, &error,
2681                                    DBUS_TYPE_STRING, &text,
2682                                    DBUS_TYPE_INVALID)) {
2683                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2684                 r = -EIO;
2685                 goto finish;
2686         }
2687
2688         fputs(text, stdout);
2689
2690         r = 0;
2691
2692 finish:
2693         if (m)
2694                 dbus_message_unref(m);
2695
2696         if (reply)
2697                 dbus_message_unref(reply);
2698
2699         dbus_error_free(&error);
2700
2701         return r;
2702 }
2703
2704 static int snapshot(DBusConnection *bus, char **args, unsigned n) {
2705         DBusMessage *m = NULL, *reply = NULL;
2706         DBusError error;
2707         int r;
2708         const char *name = "", *path, *id;
2709         dbus_bool_t cleanup = FALSE;
2710         DBusMessageIter iter, sub;
2711         const char
2712                 *interface = "org.freedesktop.systemd1.Unit",
2713                 *property = "Id";
2714
2715         dbus_error_init(&error);
2716
2717         if (!(m = dbus_message_new_method_call(
2718                               "org.freedesktop.systemd1",
2719                               "/org/freedesktop/systemd1",
2720                               "org.freedesktop.systemd1.Manager",
2721                               "CreateSnapshot"))) {
2722                 log_error("Could not allocate message.");
2723                 return -ENOMEM;
2724         }
2725
2726         if (n > 1)
2727                 name = args[1];
2728
2729         if (!dbus_message_append_args(m,
2730                                       DBUS_TYPE_STRING, &name,
2731                                       DBUS_TYPE_BOOLEAN, &cleanup,
2732                                       DBUS_TYPE_INVALID)) {
2733                 log_error("Could not append arguments to message.");
2734                 r = -ENOMEM;
2735                 goto finish;
2736         }
2737
2738         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2739                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2740                 r = -EIO;
2741                 goto finish;
2742         }
2743
2744         if (!dbus_message_get_args(reply, &error,
2745                                    DBUS_TYPE_OBJECT_PATH, &path,
2746                                    DBUS_TYPE_INVALID)) {
2747                 log_error("Failed to parse reply: %s", bus_error_message(&error));
2748                 r = -EIO;
2749                 goto finish;
2750         }
2751
2752         dbus_message_unref(m);
2753         if (!(m = dbus_message_new_method_call(
2754                               "org.freedesktop.systemd1",
2755                               path,
2756                               "org.freedesktop.DBus.Properties",
2757                               "Get"))) {
2758                 log_error("Could not allocate message.");
2759                 return -ENOMEM;
2760         }
2761
2762         if (!dbus_message_append_args(m,
2763                                       DBUS_TYPE_STRING, &interface,
2764                                       DBUS_TYPE_STRING, &property,
2765                                       DBUS_TYPE_INVALID)) {
2766                 log_error("Could not append arguments to message.");
2767                 r = -ENOMEM;
2768                 goto finish;
2769         }
2770
2771         dbus_message_unref(reply);
2772         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2773                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2774                 r = -EIO;
2775                 goto finish;
2776         }
2777
2778         if (!dbus_message_iter_init(reply, &iter) ||
2779             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
2780                 log_error("Failed to parse reply.");
2781                 r = -EIO;
2782                 goto finish;
2783         }
2784
2785         dbus_message_iter_recurse(&iter, &sub);
2786
2787         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
2788                 log_error("Failed to parse reply.");
2789                 r = -EIO;
2790                 goto finish;
2791         }
2792
2793         dbus_message_iter_get_basic(&sub, &id);
2794
2795         if (!arg_quiet)
2796                 puts(id);
2797         r = 0;
2798
2799 finish:
2800         if (m)
2801                 dbus_message_unref(m);
2802
2803         if (reply)
2804                 dbus_message_unref(reply);
2805
2806         dbus_error_free(&error);
2807
2808         return r;
2809 }
2810
2811 static int delete_snapshot(DBusConnection *bus, char **args, unsigned n) {
2812         DBusMessage *m = NULL, *reply = NULL;
2813         int r;
2814         DBusError error;
2815         unsigned i;
2816
2817         assert(bus);
2818         assert(args);
2819
2820         dbus_error_init(&error);
2821
2822         for (i = 1; i < n; i++) {
2823                 const char *path = NULL;
2824
2825                 if (!(m = dbus_message_new_method_call(
2826                                       "org.freedesktop.systemd1",
2827                                       "/org/freedesktop/systemd1",
2828                                       "org.freedesktop.systemd1.Manager",
2829                                       "GetUnit"))) {
2830                         log_error("Could not allocate message.");
2831                         r = -ENOMEM;
2832                         goto finish;
2833                 }
2834
2835                 if (!dbus_message_append_args(m,
2836                                               DBUS_TYPE_STRING, &args[i],
2837                                               DBUS_TYPE_INVALID)) {
2838                         log_error("Could not append arguments to message.");
2839                         r = -ENOMEM;
2840                         goto finish;
2841                 }
2842
2843                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2844                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2845                         r = -EIO;
2846                         goto finish;
2847                 }
2848
2849                 if (!dbus_message_get_args(reply, &error,
2850                                            DBUS_TYPE_OBJECT_PATH, &path,
2851                                            DBUS_TYPE_INVALID)) {
2852                         log_error("Failed to parse reply: %s", bus_error_message(&error));
2853                         r = -EIO;
2854                         goto finish;
2855                 }
2856
2857                 dbus_message_unref(m);
2858                 if (!(m = dbus_message_new_method_call(
2859                                       "org.freedesktop.systemd1",
2860                                       path,
2861                                       "org.freedesktop.systemd1.Snapshot",
2862                                       "Remove"))) {
2863                         log_error("Could not allocate message.");
2864                         r = -ENOMEM;
2865                         goto finish;
2866                 }
2867
2868                 dbus_message_unref(reply);
2869                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2870                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2871                         r = -EIO;
2872                         goto finish;
2873                 }
2874
2875                 dbus_message_unref(m);
2876                 dbus_message_unref(reply);
2877                 m = reply = NULL;
2878         }
2879
2880         r = 0;
2881
2882 finish:
2883         if (m)
2884                 dbus_message_unref(m);
2885
2886         if (reply)
2887                 dbus_message_unref(reply);
2888
2889         dbus_error_free(&error);
2890
2891         return r;
2892 }
2893
2894 static int daemon_reload(DBusConnection *bus, char **args, unsigned n) {
2895         DBusMessage *m = NULL, *reply = NULL;
2896         DBusError error;
2897         int r;
2898         const char *method;
2899
2900         dbus_error_init(&error);
2901
2902         if (arg_action == ACTION_RELOAD)
2903                 method = "Reload";
2904         else if (arg_action == ACTION_REEXEC)
2905                 method = "Reexecute";
2906         else {
2907                 assert(arg_action == ACTION_SYSTEMCTL);
2908
2909                 method =
2910                         streq(args[0], "clear-jobs")        ||
2911                         streq(args[0], "cancel")            ? "ClearJobs" :
2912                         streq(args[0], "daemon-reexec")     ? "Reexecute" :
2913                         streq(args[0], "reset-failed")      ? "ResetFailed" :
2914                         streq(args[0], "daemon-exit")       ? "Exit" :
2915                                                               "Reload";
2916         }
2917
2918         if (!(m = dbus_message_new_method_call(
2919                               "org.freedesktop.systemd1",
2920                               "/org/freedesktop/systemd1",
2921                               "org.freedesktop.systemd1.Manager",
2922                               method))) {
2923                 log_error("Could not allocate message.");
2924                 return -ENOMEM;
2925         }
2926
2927         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2928
2929                 if (arg_action != ACTION_SYSTEMCTL && error_is_no_service(&error)) {
2930                         /* There's always a fallback possible for
2931                          * legacy actions. */
2932                         r = -EADDRNOTAVAIL;
2933                         goto finish;
2934                 }
2935
2936                 log_error("Failed to issue method call: %s", bus_error_message(&error));
2937                 r = -EIO;
2938                 goto finish;
2939         }
2940
2941         r = 0;
2942
2943 finish:
2944         if (m)
2945                 dbus_message_unref(m);
2946
2947         if (reply)
2948                 dbus_message_unref(reply);
2949
2950         dbus_error_free(&error);
2951
2952         return r;
2953 }
2954
2955 static int reset_failed(DBusConnection *bus, char **args, unsigned n) {
2956         DBusMessage *m = NULL, *reply = NULL;
2957         unsigned i;
2958         int r;
2959         DBusError error;
2960
2961         assert(bus);
2962         dbus_error_init(&error);
2963
2964         if (n <= 1)
2965                 return daemon_reload(bus, args, n);
2966
2967         for (i = 1; i < n; i++) {
2968
2969                 if (!(m = dbus_message_new_method_call(
2970                                       "org.freedesktop.systemd1",
2971                                       "/org/freedesktop/systemd1",
2972                                       "org.freedesktop.systemd1.Manager",
2973                                       "ResetFailedUnit"))) {
2974                         log_error("Could not allocate message.");
2975                         r = -ENOMEM;
2976                         goto finish;
2977                 }
2978
2979                 if (!dbus_message_append_args(m,
2980                                               DBUS_TYPE_STRING, args + i,
2981                                               DBUS_TYPE_INVALID)) {
2982                         log_error("Could not append arguments to message.");
2983                         r = -ENOMEM;
2984                         goto finish;
2985                 }
2986
2987                 if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
2988                         log_error("Failed to issue method call: %s", bus_error_message(&error));
2989                         r = -EIO;
2990                         goto finish;
2991                 }
2992
2993                 dbus_message_unref(m);
2994                 dbus_message_unref(reply);
2995                 m = reply = NULL;
2996         }
2997
2998         r = 0;
2999
3000 finish:
3001         if (m)
3002                 dbus_message_unref(m);
3003
3004         if (reply)
3005                 dbus_message_unref(reply);
3006
3007         dbus_error_free(&error);
3008
3009         return r;
3010 }
3011
3012 static int show_enviroment(DBusConnection *bus, char **args, unsigned n) {
3013         DBusMessage *m = NULL, *reply = NULL;
3014         DBusError error;
3015         DBusMessageIter iter, sub, sub2;
3016         int r;
3017         const char
3018                 *interface = "org.freedesktop.systemd1.Manager",
3019                 *property = "Environment";
3020
3021         dbus_error_init(&error);
3022
3023         if (!(m = dbus_message_new_method_call(
3024                               "org.freedesktop.systemd1",
3025                               "/org/freedesktop/systemd1",
3026                               "org.freedesktop.DBus.Properties",
3027                               "Get"))) {
3028                 log_error("Could not allocate message.");
3029                 return -ENOMEM;
3030         }
3031
3032         if (!dbus_message_append_args(m,
3033                                       DBUS_TYPE_STRING, &interface,
3034                                       DBUS_TYPE_STRING, &property,
3035                                       DBUS_TYPE_INVALID)) {
3036                 log_error("Could not append arguments to message.");
3037                 r = -ENOMEM;
3038                 goto finish;
3039         }
3040
3041         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3042                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3043                 r = -EIO;
3044                 goto finish;
3045         }
3046
3047         if (!dbus_message_iter_init(reply, &iter) ||
3048             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
3049                 log_error("Failed to parse reply.");
3050                 r = -EIO;
3051                 goto finish;
3052         }
3053
3054         dbus_message_iter_recurse(&iter, &sub);
3055
3056         if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_ARRAY ||
3057             dbus_message_iter_get_element_type(&sub) != DBUS_TYPE_STRING)  {
3058                 log_error("Failed to parse reply.");
3059                 r = -EIO;
3060                 goto finish;
3061         }
3062
3063         dbus_message_iter_recurse(&sub, &sub2);
3064
3065         while (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_INVALID) {
3066                 const char *text;
3067
3068                 if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_STRING) {
3069                         log_error("Failed to parse reply.");
3070                         r = -EIO;
3071                         goto finish;
3072                 }
3073
3074                 dbus_message_iter_get_basic(&sub2, &text);
3075                 printf("%s\n", text);
3076
3077                 dbus_message_iter_next(&sub2);
3078         }
3079
3080         r = 0;
3081
3082 finish:
3083         if (m)
3084                 dbus_message_unref(m);
3085
3086         if (reply)
3087                 dbus_message_unref(reply);
3088
3089         dbus_error_free(&error);
3090
3091         return r;
3092 }
3093
3094 static int set_environment(DBusConnection *bus, char **args, unsigned n) {
3095         DBusMessage *m = NULL, *reply = NULL;
3096         DBusError error;
3097         int r;
3098         const char *method;
3099         DBusMessageIter iter, sub;
3100         unsigned i;
3101
3102         dbus_error_init(&error);
3103
3104         method = streq(args[0], "set-environment")
3105                 ? "SetEnvironment"
3106                 : "UnsetEnvironment";
3107
3108         if (!(m = dbus_message_new_method_call(
3109                               "org.freedesktop.systemd1",
3110                               "/org/freedesktop/systemd1",
3111                               "org.freedesktop.systemd1.Manager",
3112                               method))) {
3113
3114                 log_error("Could not allocate message.");
3115                 return -ENOMEM;
3116         }
3117
3118         dbus_message_iter_init_append(m, &iter);
3119
3120         if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) {
3121                 log_error("Could not append arguments to message.");
3122                 r = -ENOMEM;
3123                 goto finish;
3124         }
3125
3126         for (i = 1; i < n; i++)
3127                 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &args[i])) {
3128                         log_error("Could not append arguments to message.");
3129                         r = -ENOMEM;
3130                         goto finish;
3131                 }
3132
3133         if (!dbus_message_iter_close_container(&iter, &sub)) {
3134                 log_error("Could not append arguments to message.");
3135                 r = -ENOMEM;
3136                 goto finish;
3137         }
3138
3139         if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
3140                 log_error("Failed to issue method call: %s", bus_error_message(&error));
3141                 r = -EIO;