src/dbus-manager.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   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 <errno.h>
  23
  24 #include "dbus.h"
  25 #include "log.h"
  26 #include "dbus-manager.h"
  27 #include "strv.h"
  28 #include "bus-errors.h"
  29
  30 #define BUS_MANAGER_INTERFACE                                           \
  31         " <interface name=\"org.freedesktop.systemd1.Manager\">\n"      \
  32         "  <method name=\"GetUnit\">\n"                                 \
  33         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  34         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  35         "  </method>\n"                                                 \
  36         "  <method name=\"LoadUnit\">\n"                                \
  37         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  38         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  39         "  </method>\n"                                                 \
  40         "  <method name=\"StartUnit\">\n"                               \
  41         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  42         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  43         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  44         "  </method>\n"                                                 \
  45         "  <method name=\"StopUnit\">\n"                                \
  46         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  47         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  48         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  49         "  </method>\n"                                                 \
  50         "  <method name=\"ReloadUnit\">\n"                              \
  51         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  52         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  53         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  54         "  </method>\n"                                                 \
  55         "  <method name=\"RestartUnit\">\n"                             \
  56         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  57         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  58         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  59         "  </method>\n"                                                 \
  60         "  <method name=\"TryRestartUnit\">\n"                          \
  61         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  62         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  63         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  64         "  </method>\n"                                                 \
  65         "  <method name=\"GetJob\">\n"                                  \
  66         "   <arg name=\"id\" type=\"u\" direction=\"in\"/>\n"           \
  67         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  68         "  </method>\n"                                                 \
  69         "  <method name=\"ClearJobs\"/>\n"                              \
  70         "  <method name=\"ListUnits\">\n"                               \
  71         "   <arg name=\"units\" type=\"a(sssssouso)\" direction=\"out\"/>\n" \
  72         "  </method>\n"                                                 \
  73         "  <method name=\"ListJobs\">\n"                                \
  74         "   <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>\n" \
  75         "  </method>\n"                                                 \
  76         "  <method name=\"Subscribe\"/>\n"                              \
  77         "  <method name=\"Unsubscribe\"/>\n"                            \
  78         "  <method name=\"Dump\"/>\n"                                   \
  79         "  <method name=\"CreateSnapshot\">\n"                          \
  80         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  81         "   <arg nane=\"cleanup\" type=\"b\" direction=\"in\"/>\n"      \
  82         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  83         "  </method>\n"                                                 \
  84         "  <method name=\"Reload\"/>\n"                                 \
  85         "  <method name=\"Reexecute\"/>\n"                              \
  86         "  <method name=\"Exit\"/>\n"                                   \
  87         "  <method name=\"SetEnvironment\">\n"                          \
  88         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
  89         "  </method>\n"                                                 \
  90         "  <method name=\"UnsetEnvironment\">\n"                        \
  91         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
  92         "  </method>\n"                                                 \
  93         "  <signal name=\"UnitNew\">\n"                                 \
  94         "   <arg name=\"id\" type=\"s\"/>\n"                            \
  95         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
  96         "  </signal>\n"                                                 \
  97         "  <signal name=\"UnitRemoved\">\n"                             \
  98         "   <arg name=\"id\" type=\"s\"/>\n"                            \
  99         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 100         "  </signal>\n"                                                 \
 101         "  <signal name=\"JobNew\">\n"                                  \
 102         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 103         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 104         "  </signal>\n"                                                 \
 105         "  <signal name=\"JobRemoved\">\n"                              \
 106         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 107         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 108         "   <arg name=\"success\" type=\"b\"/>\n"                       \
 109         "  </signal>"                                                   \
 110         "  <property name=\"Version\" type=\"s\" access=\"read\"/>\n"   \
 111         "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
 112         "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
 113         "  <property name=\"LogLevel\" type=\"s\" access=\"read\"/>\n"  \
 114         "  <property name=\"LogTarget\" type=\"s\" access=\"read\"/>\n" \
 115         "  <property name=\"NNames\" type=\"u\" access=\"read\"/>\n"    \
 116         "  <property name=\"NJobs\" type=\"u\" access=\"read\"/>\n"     \
 117         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
 118         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
 119         "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
 120         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
 121         "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
 122         "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n" \
 123         "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
 124         " </interface>\n"
 125
 126 #define INTROSPECTION_BEGIN                                             \
 127         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 128         "<node>\n"                                                      \
 129         BUS_MANAGER_INTERFACE                                           \
 130         BUS_PROPERTIES_INTERFACE                                        \
 131         BUS_INTROSPECTABLE_INTERFACE
 132
 133 #define INTROSPECTION_END                                               \
 134         "</node>\n"
 135
 136 const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
 137
 138 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 139
 140 static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 141         const char *t;
 142
 143         assert(m);
 144         assert(i);
 145         assert(property);
 146
 147         t = log_target_to_string(log_get_target());
 148
 149         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 150                 return -ENOMEM;
 151
 152         return 0;
 153 }
 154
 155 static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 156         const char *t;
 157
 158         assert(m);
 159         assert(i);
 160         assert(property);
 161
 162         t = log_level_to_string(log_get_max_level());
 163
 164         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 165                 return -ENOMEM;
 166
 167         return 0;
 168 }
 169
 170 static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 171         uint32_t u;
 172
 173         assert(m);
 174         assert(i);
 175         assert(property);
 176
 177         u = hashmap_size(m->units);
 178
 179         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 180                 return -ENOMEM;
 181
 182         return 0;
 183 }
 184
 185 static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 186         uint32_t u;
 187
 188         assert(m);
 189         assert(i);
 190         assert(property);
 191
 192         u = hashmap_size(m->jobs);
 193
 194         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 195                 return -ENOMEM;
 196
 197         return 0;
 198 }
 199
 200 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 201         const char *s;
 202
 203         assert(m);
 204
 205         if ((s = dbus_message_get_sender(m)))
 206                 return s;
 207
 208         /* When the message came in from a direct connection the
 209          * message will have no sender. We fix that here. */
 210
 211         return ":no-sender";
 212 }
 213
 214 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 215         Manager *m = data;
 216
 217         const BusProperty properties[] = {
 218                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 219                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 220                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 221                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 222                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 223                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 224                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 225                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 226                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 227                 { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
 228                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 229                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 230                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 231                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 232                 { NULL, NULL, NULL, NULL, NULL }
 233         };
 234
 235         int r;
 236         DBusError error;
 237         DBusMessage *reply = NULL;
 238         char * path = NULL;
 239         JobType job_type = _JOB_TYPE_INVALID;
 240
 241         assert(connection);
 242         assert(message);
 243         assert(m);
 244
 245         dbus_error_init(&error);
 246
 247         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 248                 const char *name;
 249                 Unit *u;
 250
 251                 if (!dbus_message_get_args(
 252                                     message,
 253                                     &error,
 254                                     DBUS_TYPE_STRING, &name,
 255                                     DBUS_TYPE_INVALID))
 256                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 257
 258                 if (!(u = manager_get_unit(m, name))) {
 259                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 260                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 261                 }
 262
 263                 if (!(reply = dbus_message_new_method_return(message)))
 264                         goto oom;
 265
 266                 if (!(path = unit_dbus_path(u)))
 267                         goto oom;
 268
 269                 if (!dbus_message_append_args(
 270                                     reply,
 271                                     DBUS_TYPE_OBJECT_PATH, &path,
 272                                     DBUS_TYPE_INVALID))
 273                         goto oom;
 274
 275         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 276                 const char *name;
 277                 Unit *u;
 278
 279                 if (!dbus_message_get_args(
 280                                     message,
 281                                     &error,
 282                                     DBUS_TYPE_STRING, &name,
 283                                     DBUS_TYPE_INVALID))
 284                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 285
 286                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 287                         return bus_send_error_reply(m, connection, message, &error, r);
 288
 289                 if (!(reply = dbus_message_new_method_return(message)))
 290                         goto oom;
 291
 292                 if (!(path = unit_dbus_path(u)))
 293                         goto oom;
 294
 295                 if (!dbus_message_append_args(
 296                                     reply,
 297                                     DBUS_TYPE_OBJECT_PATH, &path,
 298                                     DBUS_TYPE_INVALID))
 299                         goto oom;
 300
 301         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 302                 job_type = JOB_START;
 303         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 304                 job_type = JOB_STOP;
 305         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 306                 job_type = JOB_RELOAD;
 307         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 308                 job_type = JOB_RESTART;
 309         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 310                 job_type = JOB_TRY_RESTART;
 311         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 312                 uint32_t id;
 313                 Job *j;
 314
 315                 if (!dbus_message_get_args(
 316                                     message,
 317                                     &error,
 318                                     DBUS_TYPE_UINT32, &id,
 319                                     DBUS_TYPE_INVALID))
 320                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 321
 322                 if (!(j = manager_get_job(m, id))) {
 323                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 324                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 325                 }
 326
 327                 if (!(reply = dbus_message_new_method_return(message)))
 328                         goto oom;
 329
 330                 if (!(path = job_dbus_path(j)))
 331                         goto oom;
 332
 333                 if (!dbus_message_append_args(
 334                                     reply,
 335                                     DBUS_TYPE_OBJECT_PATH, &path,
 336                                     DBUS_TYPE_INVALID))
 337                         goto oom;
 338
 339         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 340
 341                 manager_clear_jobs(m);
 342
 343                 if (!(reply = dbus_message_new_method_return(message)))
 344                         goto oom;
 345
 346         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 347                 DBusMessageIter iter, sub;
 348                 Iterator i;
 349                 Unit *u;
 350                 const char *k;
 351
 352                 if (!(reply = dbus_message_new_method_return(message)))
 353                         goto oom;
 354
 355                 dbus_message_iter_init_append(reply, &iter);
 356
 357                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sssssouso)", &sub))
 358                         goto oom;
 359
 360                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 361                         char *u_path, *j_path;
 362                         const char *description, *load_state, *active_state, *sub_state, *sjob_type;
 363                         DBusMessageIter sub2;
 364                         uint32_t job_id;
 365
 366                         if (k != u->meta.id)
 367                                 continue;
 368
 369                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 370                                 goto oom;
 371
 372                         description = unit_description(u);
 373                         load_state = unit_load_state_to_string(u->meta.load_state);
 374                         active_state = unit_active_state_to_string(unit_active_state(u));
 375                         sub_state = unit_sub_state_to_string(u);
 376
 377                         if (!(u_path = unit_dbus_path(u)))
 378                                 goto oom;
 379
 380                         if (u->meta.job) {
 381                                 job_id = (uint32_t) u->meta.job->id;
 382
 383                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 384                                         free(u_path);
 385                                         goto oom;
 386                                 }
 387
 388                                 sjob_type = job_type_to_string(u->meta.job->type);
 389                         } else {
 390                                 job_id = 0;
 391                                 j_path = u_path;
 392                                 sjob_type = "";
 393                         }
 394
 395                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 396                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 397                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 398                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 399                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 400                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 401                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 402                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 403                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 404                                 free(u_path);
 405                                 if (u->meta.job)
 406                                         free(j_path);
 407                                 goto oom;
 408                         }
 409
 410                         free(u_path);
 411                         if (u->meta.job)
 412                                 free(j_path);
 413
 414                         if (!dbus_message_iter_close_container(&sub, &sub2))
 415                                 goto oom;
 416                 }
 417
 418                 if (!dbus_message_iter_close_container(&iter, &sub))
 419                         goto oom;
 420
 421         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 422                 DBusMessageIter iter, sub;
 423                 Iterator i;
 424                 Job *j;
 425
 426                 if (!(reply = dbus_message_new_method_return(message)))
 427                         goto oom;
 428
 429                 dbus_message_iter_init_append(reply, &iter);
 430
 431                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 432                         goto oom;
 433
 434                 HASHMAP_FOREACH(j, m->jobs, i) {
 435                         char *u_path, *j_path;
 436                         const char *state, *type;
 437                         uint32_t id;
 438                         DBusMessageIter sub2;
 439
 440                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 441                                 goto oom;
 442
 443                         id = (uint32_t) j->id;
 444                         state = job_state_to_string(j->state);
 445                         type = job_type_to_string(j->type);
 446
 447                         if (!(j_path = job_dbus_path(j)))
 448                                 goto oom;
 449
 450                         if (!(u_path = unit_dbus_path(j->unit))) {
 451                                 free(j_path);
 452                                 goto oom;
 453                         }
 454
 455                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 456                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 457                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 458                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 459                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 460                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 461                                 free(j_path);
 462                                 free(u_path);
 463                                 goto oom;
 464                         }
 465
 466                         free(j_path);
 467                         free(u_path);
 468
 469                         if (!dbus_message_iter_close_container(&sub, &sub2))
 470                                 goto oom;
 471                 }
 472
 473                 if (!dbus_message_iter_close_container(&iter, &sub))
 474                         goto oom;
 475
 476         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 477                 char *client;
 478                 Set *s;
 479
 480                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 481                         if (!(s = set_new(string_hash_func, string_compare_func)))
 482                                 goto oom;
 483
 484                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 485                                 set_free(s);
 486                                 goto oom;
 487                         }
 488                 }
 489
 490                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 491                         goto oom;
 492
 493                 if ((r = set_put(s, client)) < 0) {
 494                         free(client);
 495                         return bus_send_error_reply(m, connection, message, NULL, r);
 496                 }
 497
 498                 if (!(reply = dbus_message_new_method_return(message)))
 499                         goto oom;
 500
 501         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 502                 char *client;
 503
 504                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 505                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 506                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 507                 }
 508
 509                 free(client);
 510
 511                 if (!(reply = dbus_message_new_method_return(message)))
 512                         goto oom;
 513
 514         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 515                 FILE *f;
 516                 char *dump = NULL;
 517                 size_t size;
 518
 519                 if (!(reply = dbus_message_new_method_return(message)))
 520                         goto oom;
 521
 522                 if (!(f = open_memstream(&dump, &size)))
 523                         goto oom;
 524
 525                 manager_dump_units(m, f, NULL);
 526                 manager_dump_jobs(m, f, NULL);
 527
 528                 if (ferror(f)) {
 529                         fclose(f);
 530                         free(dump);
 531                         goto oom;
 532                 }
 533
 534                 fclose(f);
 535
 536                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 537                         free(dump);
 538                         goto oom;
 539                 }
 540
 541                 free(dump);
 542         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 543                 const char *name;
 544                 dbus_bool_t cleanup;
 545                 Snapshot *s;
 546
 547                 if (!dbus_message_get_args(
 548                                     message,
 549                                     &error,
 550                                     DBUS_TYPE_STRING, &name,
 551                                     DBUS_TYPE_BOOLEAN, &cleanup,
 552                                     DBUS_TYPE_INVALID))
 553                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 554
 555                 if (name && name[0] == 0)
 556                         name = NULL;
 557
 558                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 559                         return bus_send_error_reply(m, connection, message, &error, r);
 560
 561                 if (!(reply = dbus_message_new_method_return(message)))
 562                         goto oom;
 563
 564                 if (!(path = unit_dbus_path(UNIT(s))))
 565                         goto oom;
 566
 567                 if (!dbus_message_append_args(
 568                                     reply,
 569                                     DBUS_TYPE_OBJECT_PATH, &path,
 570                                     DBUS_TYPE_INVALID))
 571                         goto oom;
 572
 573         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 574                 char *introspection = NULL;
 575                 FILE *f;
 576                 Iterator i;
 577                 Unit *u;
 578                 Job *j;
 579                 const char *k;
 580                 size_t size;
 581
 582                 if (!(reply = dbus_message_new_method_return(message)))
 583                         goto oom;
 584
 585                 /* We roll our own introspection code here, instead of
 586                  * relying on bus_default_message_handler() because we
 587                  * need to generate our introspection string
 588                  * dynamically. */
 589
 590                 if (!(f = open_memstream(&introspection, &size)))
 591                         goto oom;
 592
 593                 fputs(INTROSPECTION_BEGIN, f);
 594
 595                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 596                         char *p;
 597
 598                         if (k != u->meta.id)
 599                                 continue;
 600
 601                         if (!(p = bus_path_escape(k))) {
 602                                 fclose(f);
 603                                 free(introspection);
 604                                 goto oom;
 605                         }
 606
 607                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 608                         free(p);
 609                 }
 610
 611                 HASHMAP_FOREACH(j, m->jobs, i)
 612                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 613
 614                 fputs(INTROSPECTION_END, f);
 615
 616                 if (ferror(f)) {
 617                         fclose(f);
 618                         free(introspection);
 619                         goto oom;
 620                 }
 621
 622                 fclose(f);
 623
 624                 if (!introspection)
 625                         goto oom;
 626
 627                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 628                         free(introspection);
 629                         goto oom;
 630                 }
 631
 632                 free(introspection);
 633
 634         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 635
 636                 assert(!m->queued_message);
 637
 638                 /* Instead of sending the reply back right away, we
 639                  * just remember that we need to and then send it
 640                  * after the reload is finished. That way the caller
 641                  * knows when the reload finished. */
 642
 643                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 644                         goto oom;
 645
 646                 m->queued_message_connection = connection;
 647                 m->exit_code = MANAGER_RELOAD;
 648
 649         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 650
 651                 if (!(reply = dbus_message_new_method_return(message)))
 652                         goto oom;
 653
 654                 m->exit_code = MANAGER_REEXECUTE;
 655
 656         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 657
 658                 if (m->running_as == MANAGER_SYSTEM) {
 659                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
 660                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 661                 }
 662
 663                 if (!(reply = dbus_message_new_method_return(message)))
 664                         goto oom;
 665
 666                 m->exit_code = MANAGER_EXIT;
 667
 668         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 669                 char **l = NULL, **e = NULL;
 670
 671                 if ((r = bus_parse_strv(message, &l)) < 0) {
 672                         if (r == -ENOMEM)
 673                                 goto oom;
 674
 675                         return bus_send_error_reply(m, connection, message, NULL, r);
 676                 }
 677
 678                 e = strv_env_merge(2, m->environment, l);
 679                 strv_free(l);
 680
 681                 if (!e)
 682                         goto oom;
 683
 684                 if (!(reply = dbus_message_new_method_return(message))) {
 685                         strv_free(e);
 686                         goto oom;
 687                 }
 688
 689                 strv_free(m->environment);
 690                 m->environment = e;
 691
 692         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 693                 char **l = NULL, **e = NULL;
 694
 695                 if ((r = bus_parse_strv(message, &l)) < 0) {
 696                         if (r == -ENOMEM)
 697                                 goto oom;
 698
 699                         return bus_send_error_reply(m, connection, message, NULL, r);
 700                 }
 701
 702                 e = strv_env_delete(m->environment, 1, l);
 703                 strv_free(l);
 704
 705                 if (!e)
 706                         goto oom;
 707
 708                 if (!(reply = dbus_message_new_method_return(message)))
 709                         goto oom;
 710
 711                 strv_free(m->environment);
 712                 m->environment = e;
 713
 714         } else
 715                 return bus_default_message_handler(m, connection, message, NULL, properties);
 716
 717
 718         if (job_type != _JOB_TYPE_INVALID) {
 719                 const char *name, *smode;
 720                 JobMode mode;
 721                 Job *j;
 722                 Unit *u;
 723
 724                 if (!dbus_message_get_args(
 725                                     message,
 726                                     &error,
 727                                     DBUS_TYPE_STRING, &name,
 728                                     DBUS_TYPE_STRING, &smode,
 729                                     DBUS_TYPE_INVALID))
 730                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 731
 732                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
 733                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
 734                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 735                 }
 736
 737                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 738                         return bus_send_error_reply(m, connection, message, &error, r);
 739
 740                 if (job_type == JOB_START && u->meta.only_by_dependency) {
 741                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Unit may be activated by dependency only.");
 742                         return bus_send_error_reply(m, connection, message, &error, -EPERM);
 743                 }
 744
 745                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
 746                         return bus_send_error_reply(m, connection, message, &error, r);
 747
 748                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
 749                         goto oom;
 750
 751                 j->bus = connection;
 752
 753                 if (!(reply = dbus_message_new_method_return(message)))
 754                         goto oom;
 755
 756                 if (!(path = job_dbus_path(j)))
 757                         goto oom;
 758
 759                 if (!dbus_message_append_args(
 760                                     reply,
 761                                     DBUS_TYPE_OBJECT_PATH, &path,
 762                                     DBUS_TYPE_INVALID))
 763                         goto oom;
 764         }
 765
 766         free(path);
 767
 768         if (reply) {
 769                 if (!dbus_connection_send(connection, reply, NULL))
 770                         goto oom;
 771
 772                 dbus_message_unref(reply);
 773         }
 774
 775         return DBUS_HANDLER_RESULT_HANDLED;
 776
 777 oom:
 778         free(path);
 779
 780         if (reply)
 781                 dbus_message_unref(reply);
 782
 783         dbus_error_free(&error);
 784
 785         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 786 }
 787
 788 const DBusObjectPathVTable bus_manager_vtable = {
 789         .message_function = bus_manager_message_handler
 790 };