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=\"ReloadOrRestartUnit\">\n"                     \
  66         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  67         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  68         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  69         "  </method>\n"                                                 \
  70         "  <method name=\"ReloadOrTryRestartUnit\">\n"                  \
  71         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  72         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  73         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  74         "  </method>\n"                                                 \
  75         "  <method name=\"ResetMaintenanceUnit\">\n"                    \
  76         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  77         "  </method>\n"                                                 \
  78         "  <method name=\"GetJob\">\n"                                  \
  79         "   <arg name=\"id\" type=\"u\" direction=\"in\"/>\n"           \
  80         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  81         "  </method>\n"                                                 \
  82         "  <method name=\"ClearJobs\"/>\n"                              \
  83         "  <method name=\"ResetMaintenance\"/>\n"                       \
  84         "  <method name=\"ListUnits\">\n"                               \
  85         "   <arg name=\"units\" type=\"a(sssssouso)\" direction=\"out\"/>\n" \
  86         "  </method>\n"                                                 \
  87         "  <method name=\"ListJobs\">\n"                                \
  88         "   <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>\n" \
  89         "  </method>\n"                                                 \
  90         "  <method name=\"Subscribe\"/>\n"                              \
  91         "  <method name=\"Unsubscribe\"/>\n"                            \
  92         "  <method name=\"Dump\"/>\n"                                   \
  93         "  <method name=\"CreateSnapshot\">\n"                          \
  94         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  95         "   <arg nane=\"cleanup\" type=\"b\" direction=\"in\"/>\n"      \
  96         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  97         "  </method>\n"                                                 \
  98         "  <method name=\"Reload\"/>\n"                                 \
  99         "  <method name=\"Reexecute\"/>\n"                              \
 100         "  <method name=\"Exit\"/>\n"                                   \
 101         "  <method name=\"SetEnvironment\">\n"                          \
 102         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 103         "  </method>\n"                                                 \
 104         "  <method name=\"UnsetEnvironment\">\n"                        \
 105         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 106         "  </method>\n"                                                 \
 107         "  <signal name=\"UnitNew\">\n"                                 \
 108         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 109         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 110         "  </signal>\n"                                                 \
 111         "  <signal name=\"UnitRemoved\">\n"                             \
 112         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 113         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 114         "  </signal>\n"                                                 \
 115         "  <signal name=\"JobNew\">\n"                                  \
 116         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 117         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 118         "  </signal>\n"                                                 \
 119         "  <signal name=\"JobRemoved\">\n"                              \
 120         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 121         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 122         "   <arg name=\"success\" type=\"b\"/>\n"                       \
 123         "  </signal>"                                                   \
 124         "  <property name=\"Version\" type=\"s\" access=\"read\"/>\n"   \
 125         "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
 126         "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
 127         "  <property name=\"LogLevel\" type=\"s\" access=\"read\"/>\n"  \
 128         "  <property name=\"LogTarget\" type=\"s\" access=\"read\"/>\n" \
 129         "  <property name=\"NNames\" type=\"u\" access=\"read\"/>\n"    \
 130         "  <property name=\"NJobs\" type=\"u\" access=\"read\"/>\n"     \
 131         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
 132         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
 133         "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
 134         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
 135         "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
 136         "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n" \
 137         "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
 138         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 139         " </interface>\n"
 140
 141 #define INTROSPECTION_BEGIN                                             \
 142         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 143         "<node>\n"                                                      \
 144         BUS_MANAGER_INTERFACE                                           \
 145         BUS_PROPERTIES_INTERFACE                                        \
 146         BUS_INTROSPECTABLE_INTERFACE
 147
 148 #define INTROSPECTION_END                                               \
 149         "</node>\n"
 150
 151 const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
 152
 153 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 154
 155 static int bus_manager_append_log_target(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_target_to_string(log_get_target());
 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_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 171         const char *t;
 172
 173         assert(m);
 174         assert(i);
 175         assert(property);
 176
 177         t = log_level_to_string(log_get_max_level());
 178
 179         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 180                 return -ENOMEM;
 181
 182         return 0;
 183 }
 184
 185 static int bus_manager_append_n_names(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->units);
 193
 194         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 195                 return -ENOMEM;
 196
 197         return 0;
 198 }
 199
 200 static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 201         uint32_t u;
 202
 203         assert(m);
 204         assert(i);
 205         assert(property);
 206
 207         u = hashmap_size(m->jobs);
 208
 209         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 210                 return -ENOMEM;
 211
 212         return 0;
 213 }
 214
 215 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 216         const char *s;
 217
 218         assert(m);
 219
 220         if ((s = dbus_message_get_sender(m)))
 221                 return s;
 222
 223         /* When the message came in from a direct connection the
 224          * message will have no sender. We fix that here. */
 225
 226         return ":no-sender";
 227 }
 228
 229 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 230         Manager *m = data;
 231
 232         const BusProperty properties[] = {
 233                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 234                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 235                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 236                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 237                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 238                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 239                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 240                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 241                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 242                 { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
 243                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 244                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 245                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 246                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 247                 { "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
 248                 { NULL, NULL, NULL, NULL, NULL }
 249         };
 250
 251         int r;
 252         DBusError error;
 253         DBusMessage *reply = NULL;
 254         char * path = NULL;
 255         JobType job_type = _JOB_TYPE_INVALID;
 256         bool reload_if_possible = false;
 257
 258         assert(connection);
 259         assert(message);
 260         assert(m);
 261
 262         dbus_error_init(&error);
 263
 264         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 265                 const char *name;
 266                 Unit *u;
 267
 268                 if (!dbus_message_get_args(
 269                                     message,
 270                                     &error,
 271                                     DBUS_TYPE_STRING, &name,
 272                                     DBUS_TYPE_INVALID))
 273                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 274
 275                 if (!(u = manager_get_unit(m, name))) {
 276                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 277                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 278                 }
 279
 280                 if (!(reply = dbus_message_new_method_return(message)))
 281                         goto oom;
 282
 283                 if (!(path = unit_dbus_path(u)))
 284                         goto oom;
 285
 286                 if (!dbus_message_append_args(
 287                                     reply,
 288                                     DBUS_TYPE_OBJECT_PATH, &path,
 289                                     DBUS_TYPE_INVALID))
 290                         goto oom;
 291
 292         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 293                 const char *name;
 294                 Unit *u;
 295
 296                 if (!dbus_message_get_args(
 297                                     message,
 298                                     &error,
 299                                     DBUS_TYPE_STRING, &name,
 300                                     DBUS_TYPE_INVALID))
 301                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 302
 303                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 304                         return bus_send_error_reply(m, connection, message, &error, r);
 305
 306                 if (!(reply = dbus_message_new_method_return(message)))
 307                         goto oom;
 308
 309                 if (!(path = unit_dbus_path(u)))
 310                         goto oom;
 311
 312                 if (!dbus_message_append_args(
 313                                     reply,
 314                                     DBUS_TYPE_OBJECT_PATH, &path,
 315                                     DBUS_TYPE_INVALID))
 316                         goto oom;
 317
 318         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 319                 job_type = JOB_START;
 320         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 321                 job_type = JOB_STOP;
 322         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 323                 job_type = JOB_RELOAD;
 324         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 325                 job_type = JOB_RESTART;
 326         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 327                 job_type = JOB_TRY_RESTART;
 328         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
 329                 reload_if_possible = true;
 330                 job_type = JOB_RESTART;
 331         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
 332                 reload_if_possible = true;
 333                 job_type = JOB_TRY_RESTART;
 334         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 335                 uint32_t id;
 336                 Job *j;
 337
 338                 if (!dbus_message_get_args(
 339                                     message,
 340                                     &error,
 341                                     DBUS_TYPE_UINT32, &id,
 342                                     DBUS_TYPE_INVALID))
 343                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 344
 345                 if (!(j = manager_get_job(m, id))) {
 346                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 347                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 348                 }
 349
 350                 if (!(reply = dbus_message_new_method_return(message)))
 351                         goto oom;
 352
 353                 if (!(path = job_dbus_path(j)))
 354                         goto oom;
 355
 356                 if (!dbus_message_append_args(
 357                                     reply,
 358                                     DBUS_TYPE_OBJECT_PATH, &path,
 359                                     DBUS_TYPE_INVALID))
 360                         goto oom;
 361
 362         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 363
 364                 manager_clear_jobs(m);
 365
 366                 if (!(reply = dbus_message_new_method_return(message)))
 367                         goto oom;
 368
 369         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenance")) {
 370
 371                 manager_reset_maintenance(m);
 372
 373                 if (!(reply = dbus_message_new_method_return(message)))
 374                         goto oom;
 375
 376         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenanceUnit")) {
 377                 const char *name;
 378                 Unit *u;
 379
 380                 if (!dbus_message_get_args(
 381                                     message,
 382                                     &error,
 383                                     DBUS_TYPE_STRING, &name,
 384                                     DBUS_TYPE_INVALID))
 385                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 386
 387                 if (!(u = manager_get_unit(m, name))) {
 388                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 389                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 390                 }
 391
 392                 unit_reset_maintenance(u);
 393
 394                 if (!(reply = dbus_message_new_method_return(message)))
 395                         goto oom;
 396
 397         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 398                 DBusMessageIter iter, sub;
 399                 Iterator i;
 400                 Unit *u;
 401                 const char *k;
 402
 403                 if (!(reply = dbus_message_new_method_return(message)))
 404                         goto oom;
 405
 406                 dbus_message_iter_init_append(reply, &iter);
 407
 408                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sssssouso)", &sub))
 409                         goto oom;
 410
 411                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 412                         char *u_path, *j_path;
 413                         const char *description, *load_state, *active_state, *sub_state, *sjob_type;
 414                         DBusMessageIter sub2;
 415                         uint32_t job_id;
 416
 417                         if (k != u->meta.id)
 418                                 continue;
 419
 420                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 421                                 goto oom;
 422
 423                         description = unit_description(u);
 424                         load_state = unit_load_state_to_string(u->meta.load_state);
 425                         active_state = unit_active_state_to_string(unit_active_state(u));
 426                         sub_state = unit_sub_state_to_string(u);
 427
 428                         if (!(u_path = unit_dbus_path(u)))
 429                                 goto oom;
 430
 431                         if (u->meta.job) {
 432                                 job_id = (uint32_t) u->meta.job->id;
 433
 434                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 435                                         free(u_path);
 436                                         goto oom;
 437                                 }
 438
 439                                 sjob_type = job_type_to_string(u->meta.job->type);
 440                         } else {
 441                                 job_id = 0;
 442                                 j_path = u_path;
 443                                 sjob_type = "";
 444                         }
 445
 446                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 447                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 448                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 449                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 450                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 451                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 452                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 453                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 454                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 455                                 free(u_path);
 456                                 if (u->meta.job)
 457                                         free(j_path);
 458                                 goto oom;
 459                         }
 460
 461                         free(u_path);
 462                         if (u->meta.job)
 463                                 free(j_path);
 464
 465                         if (!dbus_message_iter_close_container(&sub, &sub2))
 466                                 goto oom;
 467                 }
 468
 469                 if (!dbus_message_iter_close_container(&iter, &sub))
 470                         goto oom;
 471
 472         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 473                 DBusMessageIter iter, sub;
 474                 Iterator i;
 475                 Job *j;
 476
 477                 if (!(reply = dbus_message_new_method_return(message)))
 478                         goto oom;
 479
 480                 dbus_message_iter_init_append(reply, &iter);
 481
 482                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 483                         goto oom;
 484
 485                 HASHMAP_FOREACH(j, m->jobs, i) {
 486                         char *u_path, *j_path;
 487                         const char *state, *type;
 488                         uint32_t id;
 489                         DBusMessageIter sub2;
 490
 491                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 492                                 goto oom;
 493
 494                         id = (uint32_t) j->id;
 495                         state = job_state_to_string(j->state);
 496                         type = job_type_to_string(j->type);
 497
 498                         if (!(j_path = job_dbus_path(j)))
 499                                 goto oom;
 500
 501                         if (!(u_path = unit_dbus_path(j->unit))) {
 502                                 free(j_path);
 503                                 goto oom;
 504                         }
 505
 506                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 507                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 508                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 509                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 510                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 511                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 512                                 free(j_path);
 513                                 free(u_path);
 514                                 goto oom;
 515                         }
 516
 517                         free(j_path);
 518                         free(u_path);
 519
 520                         if (!dbus_message_iter_close_container(&sub, &sub2))
 521                                 goto oom;
 522                 }
 523
 524                 if (!dbus_message_iter_close_container(&iter, &sub))
 525                         goto oom;
 526
 527         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 528                 char *client;
 529                 Set *s;
 530
 531                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 532                         if (!(s = set_new(string_hash_func, string_compare_func)))
 533                                 goto oom;
 534
 535                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 536                                 set_free(s);
 537                                 goto oom;
 538                         }
 539                 }
 540
 541                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 542                         goto oom;
 543
 544                 if ((r = set_put(s, client)) < 0) {
 545                         free(client);
 546                         return bus_send_error_reply(m, connection, message, NULL, r);
 547                 }
 548
 549                 if (!(reply = dbus_message_new_method_return(message)))
 550                         goto oom;
 551
 552         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 553                 char *client;
 554
 555                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 556                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 557                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 558                 }
 559
 560                 free(client);
 561
 562                 if (!(reply = dbus_message_new_method_return(message)))
 563                         goto oom;
 564
 565         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 566                 FILE *f;
 567                 char *dump = NULL;
 568                 size_t size;
 569
 570                 if (!(reply = dbus_message_new_method_return(message)))
 571                         goto oom;
 572
 573                 if (!(f = open_memstream(&dump, &size)))
 574                         goto oom;
 575
 576                 manager_dump_units(m, f, NULL);
 577                 manager_dump_jobs(m, f, NULL);
 578
 579                 if (ferror(f)) {
 580                         fclose(f);
 581                         free(dump);
 582                         goto oom;
 583                 }
 584
 585                 fclose(f);
 586
 587                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 588                         free(dump);
 589                         goto oom;
 590                 }
 591
 592                 free(dump);
 593         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 594                 const char *name;
 595                 dbus_bool_t cleanup;
 596                 Snapshot *s;
 597
 598                 if (!dbus_message_get_args(
 599                                     message,
 600                                     &error,
 601                                     DBUS_TYPE_STRING, &name,
 602                                     DBUS_TYPE_BOOLEAN, &cleanup,
 603                                     DBUS_TYPE_INVALID))
 604                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 605
 606                 if (name && name[0] == 0)
 607                         name = NULL;
 608
 609                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 610                         return bus_send_error_reply(m, connection, message, &error, r);
 611
 612                 if (!(reply = dbus_message_new_method_return(message)))
 613                         goto oom;
 614
 615                 if (!(path = unit_dbus_path(UNIT(s))))
 616                         goto oom;
 617
 618                 if (!dbus_message_append_args(
 619                                     reply,
 620                                     DBUS_TYPE_OBJECT_PATH, &path,
 621                                     DBUS_TYPE_INVALID))
 622                         goto oom;
 623
 624         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 625                 char *introspection = NULL;
 626                 FILE *f;
 627                 Iterator i;
 628                 Unit *u;
 629                 Job *j;
 630                 const char *k;
 631                 size_t size;
 632
 633                 if (!(reply = dbus_message_new_method_return(message)))
 634                         goto oom;
 635
 636                 /* We roll our own introspection code here, instead of
 637                  * relying on bus_default_message_handler() because we
 638                  * need to generate our introspection string
 639                  * dynamically. */
 640
 641                 if (!(f = open_memstream(&introspection, &size)))
 642                         goto oom;
 643
 644                 fputs(INTROSPECTION_BEGIN, f);
 645
 646                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 647                         char *p;
 648
 649                         if (k != u->meta.id)
 650                                 continue;
 651
 652                         if (!(p = bus_path_escape(k))) {
 653                                 fclose(f);
 654                                 free(introspection);
 655                                 goto oom;
 656                         }
 657
 658                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 659                         free(p);
 660                 }
 661
 662                 HASHMAP_FOREACH(j, m->jobs, i)
 663                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 664
 665                 fputs(INTROSPECTION_END, f);
 666
 667                 if (ferror(f)) {
 668                         fclose(f);
 669                         free(introspection);
 670                         goto oom;
 671                 }
 672
 673                 fclose(f);
 674
 675                 if (!introspection)
 676                         goto oom;
 677
 678                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 679                         free(introspection);
 680                         goto oom;
 681                 }
 682
 683                 free(introspection);
 684
 685         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 686
 687                 assert(!m->queued_message);
 688
 689                 /* Instead of sending the reply back right away, we
 690                  * just remember that we need to and then send it
 691                  * after the reload is finished. That way the caller
 692                  * knows when the reload finished. */
 693
 694                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 695                         goto oom;
 696
 697                 m->queued_message_connection = connection;
 698                 m->exit_code = MANAGER_RELOAD;
 699
 700         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 701
 702                 if (!(reply = dbus_message_new_method_return(message)))
 703                         goto oom;
 704
 705                 m->exit_code = MANAGER_REEXECUTE;
 706
 707         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 708
 709                 if (m->running_as == MANAGER_SYSTEM) {
 710                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
 711                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 712                 }
 713
 714                 if (!(reply = dbus_message_new_method_return(message)))
 715                         goto oom;
 716
 717                 m->exit_code = MANAGER_EXIT;
 718
 719         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 720                 char **l = NULL, **e = NULL;
 721
 722                 if ((r = bus_parse_strv(message, &l)) < 0) {
 723                         if (r == -ENOMEM)
 724                                 goto oom;
 725
 726                         return bus_send_error_reply(m, connection, message, NULL, r);
 727                 }
 728
 729                 e = strv_env_merge(2, m->environment, l);
 730                 strv_free(l);
 731
 732                 if (!e)
 733                         goto oom;
 734
 735                 if (!(reply = dbus_message_new_method_return(message))) {
 736                         strv_free(e);
 737                         goto oom;
 738                 }
 739
 740                 strv_free(m->environment);
 741                 m->environment = e;
 742
 743         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 744                 char **l = NULL, **e = NULL;
 745
 746                 if ((r = bus_parse_strv(message, &l)) < 0) {
 747                         if (r == -ENOMEM)
 748                                 goto oom;
 749
 750                         return bus_send_error_reply(m, connection, message, NULL, r);
 751                 }
 752
 753                 e = strv_env_delete(m->environment, 1, l);
 754                 strv_free(l);
 755
 756                 if (!e)
 757                         goto oom;
 758
 759                 if (!(reply = dbus_message_new_method_return(message)))
 760                         goto oom;
 761
 762                 strv_free(m->environment);
 763                 m->environment = e;
 764
 765         } else
 766                 return bus_default_message_handler(m, connection, message, NULL, properties);
 767
 768         if (job_type != _JOB_TYPE_INVALID) {
 769                 const char *name, *smode;
 770                 JobMode mode;
 771                 Job *j;
 772                 Unit *u;
 773
 774                 if (!dbus_message_get_args(
 775                                     message,
 776                                     &error,
 777                                     DBUS_TYPE_STRING, &name,
 778                                     DBUS_TYPE_STRING, &smode,
 779                                     DBUS_TYPE_INVALID))
 780                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 781
 782                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
 783                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
 784                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 785                 }
 786
 787                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 788                         return bus_send_error_reply(m, connection, message, &error, r);
 789
 790                 if (reload_if_possible && unit_can_reload(u)) {
 791                         if (job_type == JOB_RESTART)
 792                                 job_type = JOB_RELOAD_OR_START;
 793                         else if (job_type == JOB_TRY_RESTART)
 794                                 job_type = JOB_RELOAD;
 795                 }
 796
 797                 if (job_type == JOB_START && u->meta.only_by_dependency) {
 798                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Unit may be activated by dependency only.");
 799                         return bus_send_error_reply(m, connection, message, &error, -EPERM);
 800                 }
 801
 802                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
 803                         return bus_send_error_reply(m, connection, message, &error, r);
 804
 805                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
 806                         goto oom;
 807
 808                 j->bus = connection;
 809
 810                 if (!(reply = dbus_message_new_method_return(message)))
 811                         goto oom;
 812
 813                 if (!(path = job_dbus_path(j)))
 814                         goto oom;
 815
 816                 if (!dbus_message_append_args(
 817                                     reply,
 818                                     DBUS_TYPE_OBJECT_PATH, &path,
 819                                     DBUS_TYPE_INVALID))
 820                         goto oom;
 821         }
 822
 823         free(path);
 824
 825         if (reply) {
 826                 if (!dbus_connection_send(connection, reply, NULL))
 827                         goto oom;
 828
 829                 dbus_message_unref(reply);
 830         }
 831
 832         return DBUS_HANDLER_RESULT_HANDLED;
 833
 834 oom:
 835         free(path);
 836
 837         if (reply)
 838                 dbus_message_unref(reply);
 839
 840         dbus_error_free(&error);
 841
 842         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 843 }
 844
 845 const DBusObjectPathVTable bus_manager_vtable = {
 846         .message_function = bus_manager_message_handler
 847 };