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