src/dbus-manager.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <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=\"GetUnitByPID\">\n"                            \
  37         "   <arg name=\"pid\" type=\"u\" direction=\"in\"/>\n"         \
  38         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  39         "  </method>\n"                                                 \
  40         "  <method name=\"LoadUnit\">\n"                                \
  41         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  42         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  43         "  </method>\n"                                                 \
  44         "  <method name=\"StartUnit\">\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=\"StopUnit\">\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=\"ReloadUnit\">\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=\"RestartUnit\">\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=\"TryRestartUnit\">\n"                          \
  65         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  66         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  67         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  68         "  </method>\n"                                                 \
  69         "  <method name=\"ReloadOrRestartUnit\">\n"                     \
  70         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  71         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  72         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  73         "  </method>\n"                                                 \
  74         "  <method name=\"ReloadOrTryRestartUnit\">\n"                  \
  75         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  76         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  77         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  78         "  </method>\n"                                                 \
  79         "  <method name=\"ResetMaintenanceUnit\">\n"                    \
  80         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  81         "  </method>\n"                                                 \
  82         "  <method name=\"GetJob\">\n"                                  \
  83         "   <arg name=\"id\" type=\"u\" direction=\"in\"/>\n"           \
  84         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  85         "  </method>\n"                                                 \
  86         "  <method name=\"ClearJobs\"/>\n"                              \
  87         "  <method name=\"ResetMaintenance\"/>\n"                       \
  88         "  <method name=\"ListUnits\">\n"                               \
  89         "   <arg name=\"units\" type=\"a(ssssssouso)\" direction=\"out\"/>\n" \
  90         "  </method>\n"                                                 \
  91         "  <method name=\"ListJobs\">\n"                                \
  92         "   <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>\n" \
  93         "  </method>\n"                                                 \
  94         "  <method name=\"Subscribe\"/>\n"                              \
  95         "  <method name=\"Unsubscribe\"/>\n"                            \
  96         "  <method name=\"Dump\"/>\n"                                   \
  97         "  <method name=\"CreateSnapshot\">\n"                          \
  98         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  99         "   <arg name=\"cleanup\" type=\"b\" direction=\"in\"/>\n"      \
 100         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
 101         "  </method>\n"                                                 \
 102         "  <method name=\"Reload\"/>\n"                                 \
 103         "  <method name=\"Reexecute\"/>\n"                              \
 104         "  <method name=\"Exit\"/>\n"                                   \
 105         "  <method name=\"SetEnvironment\">\n"                          \
 106         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 107         "  </method>\n"                                                 \
 108         "  <method name=\"UnsetEnvironment\">\n"                        \
 109         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 110         "  </method>\n"                                                 \
 111         "  <signal name=\"UnitNew\">\n"                                 \
 112         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 113         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 114         "  </signal>\n"                                                 \
 115         "  <signal name=\"UnitRemoved\">\n"                             \
 116         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 117         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 118         "  </signal>\n"                                                 \
 119         "  <signal name=\"JobNew\">\n"                                  \
 120         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 121         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 122         "  </signal>\n"                                                 \
 123         "  <signal name=\"JobRemoved\">\n"                              \
 124         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 125         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 126         "   <arg name=\"success\" type=\"b\"/>\n"                       \
 127         "  </signal>"                                                   \
 128         "  <property name=\"Version\" type=\"s\" access=\"read\"/>\n"   \
 129         "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
 130         "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
 131         "  <property name=\"LogLevel\" type=\"s\" access=\"read\"/>\n"  \
 132         "  <property name=\"LogTarget\" type=\"s\" access=\"read\"/>\n" \
 133         "  <property name=\"NNames\" type=\"u\" access=\"read\"/>\n"    \
 134         "  <property name=\"NJobs\" type=\"u\" access=\"read\"/>\n"     \
 135         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
 136         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
 137         "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
 138         "  <property name=\"SysVConsole\" type=\"b\" access=\"read\"/>\n" \
 139         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
 140         "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
 141         "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n" \
 142         "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
 143         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 144         " </interface>\n"
 145
 146 #define INTROSPECTION_BEGIN                                             \
 147         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 148         "<node>\n"                                                      \
 149         BUS_MANAGER_INTERFACE                                           \
 150         BUS_PROPERTIES_INTERFACE                                        \
 151         BUS_PEER_INTERFACE                                              \
 152         BUS_INTROSPECTABLE_INTERFACE
 153
 154 #define INTROSPECTION_END                                               \
 155         "</node>\n"
 156
 157 const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
 158
 159 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 160
 161 static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 162         const char *t;
 163
 164         assert(m);
 165         assert(i);
 166         assert(property);
 167
 168         t = log_target_to_string(log_get_target());
 169
 170         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 171                 return -ENOMEM;
 172
 173         return 0;
 174 }
 175
 176 static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 177         const char *t;
 178
 179         assert(m);
 180         assert(i);
 181         assert(property);
 182
 183         t = log_level_to_string(log_get_max_level());
 184
 185         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 186                 return -ENOMEM;
 187
 188         return 0;
 189 }
 190
 191 static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 192         uint32_t u;
 193
 194         assert(m);
 195         assert(i);
 196         assert(property);
 197
 198         u = hashmap_size(m->units);
 199
 200         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 201                 return -ENOMEM;
 202
 203         return 0;
 204 }
 205
 206 static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 207         uint32_t u;
 208
 209         assert(m);
 210         assert(i);
 211         assert(property);
 212
 213         u = hashmap_size(m->jobs);
 214
 215         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 216                 return -ENOMEM;
 217
 218         return 0;
 219 }
 220
 221 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 222         const char *s;
 223
 224         assert(m);
 225
 226         if ((s = dbus_message_get_sender(m)))
 227                 return s;
 228
 229         /* When the message came in from a direct connection the
 230          * message will have no sender. We fix that here. */
 231
 232         return ":no-sender";
 233 }
 234
 235 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 236         Manager *m = data;
 237
 238         const BusProperty properties[] = {
 239                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 240                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 241                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 242                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 243                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 244                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 245                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 246                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 247                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 248                 { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
 249                 { "org.freedesktop.systemd1.Manager", "SysVConsole",   bus_property_append_bool,      "b",  &m->sysv_console   },
 250                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 251                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 252                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 253                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 254                 { "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
 255                 { NULL, NULL, NULL, NULL, NULL }
 256         };
 257
 258         int r;
 259         DBusError error;
 260         DBusMessage *reply = NULL;
 261         char * path = NULL;
 262         JobType job_type = _JOB_TYPE_INVALID;
 263         bool reload_if_possible = false;
 264
 265         assert(connection);
 266         assert(message);
 267         assert(m);
 268
 269         dbus_error_init(&error);
 270
 271         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 272                 const char *name;
 273                 Unit *u;
 274
 275                 if (!dbus_message_get_args(
 276                                     message,
 277                                     &error,
 278                                     DBUS_TYPE_STRING, &name,
 279                                     DBUS_TYPE_INVALID))
 280                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 281
 282                 if (!(u = manager_get_unit(m, name))) {
 283                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 284                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 285                 }
 286
 287                 if (!(reply = dbus_message_new_method_return(message)))
 288                         goto oom;
 289
 290                 if (!(path = unit_dbus_path(u)))
 291                         goto oom;
 292
 293                 if (!dbus_message_append_args(
 294                                     reply,
 295                                     DBUS_TYPE_OBJECT_PATH, &path,
 296                                     DBUS_TYPE_INVALID))
 297                         goto oom;
 298         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnitByPID")) {
 299                 Unit *u;
 300                 uint32_t pid;
 301
 302                 if (!dbus_message_get_args(
 303                                     message,
 304                                     &error,
 305                                     DBUS_TYPE_UINT32, &pid,
 306                                     DBUS_TYPE_INVALID))
 307                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 308
 309                 if (!(u = cgroup_unit_by_pid(m, (pid_t) pid))) {
 310                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "No unit for PID %lu is loaded.", (unsigned long) pid);
 311                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 312                 }
 313
 314                 if (!(reply = dbus_message_new_method_return(message)))
 315                         goto oom;
 316
 317                 if (!(path = unit_dbus_path(u)))
 318                         goto oom;
 319
 320                 if (!dbus_message_append_args(
 321                                     reply,
 322                                     DBUS_TYPE_OBJECT_PATH, &path,
 323                                     DBUS_TYPE_INVALID))
 324                         goto oom;
 325         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 326                 const char *name;
 327                 Unit *u;
 328
 329                 if (!dbus_message_get_args(
 330                                     message,
 331                                     &error,
 332                                     DBUS_TYPE_STRING, &name,
 333                                     DBUS_TYPE_INVALID))
 334                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 335
 336                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 337                         return bus_send_error_reply(m, connection, message, &error, r);
 338
 339                 if (!(reply = dbus_message_new_method_return(message)))
 340                         goto oom;
 341
 342                 if (!(path = unit_dbus_path(u)))
 343                         goto oom;
 344
 345                 if (!dbus_message_append_args(
 346                                     reply,
 347                                     DBUS_TYPE_OBJECT_PATH, &path,
 348                                     DBUS_TYPE_INVALID))
 349                         goto oom;
 350
 351         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 352                 job_type = JOB_START;
 353         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 354                 job_type = JOB_STOP;
 355         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 356                 job_type = JOB_RELOAD;
 357         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 358                 job_type = JOB_RESTART;
 359         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 360                 job_type = JOB_TRY_RESTART;
 361         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
 362                 reload_if_possible = true;
 363                 job_type = JOB_RESTART;
 364         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
 365                 reload_if_possible = true;
 366                 job_type = JOB_TRY_RESTART;
 367         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 368                 uint32_t id;
 369                 Job *j;
 370
 371                 if (!dbus_message_get_args(
 372                                     message,
 373                                     &error,
 374                                     DBUS_TYPE_UINT32, &id,
 375                                     DBUS_TYPE_INVALID))
 376                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 377
 378                 if (!(j = manager_get_job(m, id))) {
 379                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 380                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 381                 }
 382
 383                 if (!(reply = dbus_message_new_method_return(message)))
 384                         goto oom;
 385
 386                 if (!(path = job_dbus_path(j)))
 387                         goto oom;
 388
 389                 if (!dbus_message_append_args(
 390                                     reply,
 391                                     DBUS_TYPE_OBJECT_PATH, &path,
 392                                     DBUS_TYPE_INVALID))
 393                         goto oom;
 394
 395         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 396
 397                 manager_clear_jobs(m);
 398
 399                 if (!(reply = dbus_message_new_method_return(message)))
 400                         goto oom;
 401
 402         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenance")) {
 403
 404                 manager_reset_maintenance(m);
 405
 406                 if (!(reply = dbus_message_new_method_return(message)))
 407                         goto oom;
 408
 409         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenanceUnit")) {
 410                 const char *name;
 411                 Unit *u;
 412
 413                 if (!dbus_message_get_args(
 414                                     message,
 415                                     &error,
 416                                     DBUS_TYPE_STRING, &name,
 417                                     DBUS_TYPE_INVALID))
 418                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 419
 420                 if (!(u = manager_get_unit(m, name))) {
 421                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 422                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 423                 }
 424
 425                 unit_reset_maintenance(u);
 426
 427                 if (!(reply = dbus_message_new_method_return(message)))
 428                         goto oom;
 429
 430         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 431                 DBusMessageIter iter, sub;
 432                 Iterator i;
 433                 Unit *u;
 434                 const char *k;
 435
 436                 if (!(reply = dbus_message_new_method_return(message)))
 437                         goto oom;
 438
 439                 dbus_message_iter_init_append(reply, &iter);
 440
 441                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssssouso)", &sub))
 442                         goto oom;
 443
 444                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 445                         char *u_path, *j_path;
 446                         const char *description, *load_state, *active_state, *sub_state, *sjob_type, *following;
 447                         DBusMessageIter sub2;
 448                         uint32_t job_id;
 449                         Unit *f;
 450
 451                         if (k != u->meta.id)
 452                                 continue;
 453
 454                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 455                                 goto oom;
 456
 457                         description = unit_description(u);
 458                         load_state = unit_load_state_to_string(u->meta.load_state);
 459                         active_state = unit_active_state_to_string(unit_active_state(u));
 460                         sub_state = unit_sub_state_to_string(u);
 461
 462                         f = unit_following(u);
 463                         following = f ? f->meta.id : "";
 464
 465                         if (!(u_path = unit_dbus_path(u)))
 466                                 goto oom;
 467
 468                         if (u->meta.job) {
 469                                 job_id = (uint32_t) u->meta.job->id;
 470
 471                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 472                                         free(u_path);
 473                                         goto oom;
 474                                 }
 475
 476                                 sjob_type = job_type_to_string(u->meta.job->type);
 477                         } else {
 478                                 job_id = 0;
 479                                 j_path = u_path;
 480                                 sjob_type = "";
 481                         }
 482
 483                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 484                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 485                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 486                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 487                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 488                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &following) ||
 489                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 490                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 491                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 492                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 493                                 free(u_path);
 494                                 if (u->meta.job)
 495                                         free(j_path);
 496                                 goto oom;
 497                         }
 498
 499                         free(u_path);
 500                         if (u->meta.job)
 501                                 free(j_path);
 502
 503                         if (!dbus_message_iter_close_container(&sub, &sub2))
 504                                 goto oom;
 505                 }
 506
 507                 if (!dbus_message_iter_close_container(&iter, &sub))
 508                         goto oom;
 509
 510         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 511                 DBusMessageIter iter, sub;
 512                 Iterator i;
 513                 Job *j;
 514
 515                 if (!(reply = dbus_message_new_method_return(message)))
 516                         goto oom;
 517
 518                 dbus_message_iter_init_append(reply, &iter);
 519
 520                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 521                         goto oom;
 522
 523                 HASHMAP_FOREACH(j, m->jobs, i) {
 524                         char *u_path, *j_path;
 525                         const char *state, *type;
 526                         uint32_t id;
 527                         DBusMessageIter sub2;
 528
 529                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 530                                 goto oom;
 531
 532                         id = (uint32_t) j->id;
 533                         state = job_state_to_string(j->state);
 534                         type = job_type_to_string(j->type);
 535
 536                         if (!(j_path = job_dbus_path(j)))
 537                                 goto oom;
 538
 539                         if (!(u_path = unit_dbus_path(j->unit))) {
 540                                 free(j_path);
 541                                 goto oom;
 542                         }
 543
 544                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 545                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 546                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 547                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 548                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 549                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 550                                 free(j_path);
 551                                 free(u_path);
 552                                 goto oom;
 553                         }
 554
 555                         free(j_path);
 556                         free(u_path);
 557
 558                         if (!dbus_message_iter_close_container(&sub, &sub2))
 559                                 goto oom;
 560                 }
 561
 562                 if (!dbus_message_iter_close_container(&iter, &sub))
 563                         goto oom;
 564
 565         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 566                 char *client;
 567                 Set *s;
 568
 569                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 570                         if (!(s = set_new(string_hash_func, string_compare_func)))
 571                                 goto oom;
 572
 573                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 574                                 set_free(s);
 575                                 goto oom;
 576                         }
 577                 }
 578
 579                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 580                         goto oom;
 581
 582                 if ((r = set_put(s, client)) < 0) {
 583                         free(client);
 584                         return bus_send_error_reply(m, connection, message, NULL, r);
 585                 }
 586
 587                 if (!(reply = dbus_message_new_method_return(message)))
 588                         goto oom;
 589
 590         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 591                 char *client;
 592
 593                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 594                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 595                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 596                 }
 597
 598                 free(client);
 599
 600                 if (!(reply = dbus_message_new_method_return(message)))
 601                         goto oom;
 602
 603         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 604                 FILE *f;
 605                 char *dump = NULL;
 606                 size_t size;
 607
 608                 if (!(reply = dbus_message_new_method_return(message)))
 609                         goto oom;
 610
 611                 if (!(f = open_memstream(&dump, &size)))
 612                         goto oom;
 613
 614                 manager_dump_units(m, f, NULL);
 615                 manager_dump_jobs(m, f, NULL);
 616
 617                 if (ferror(f)) {
 618                         fclose(f);
 619                         free(dump);
 620                         goto oom;
 621                 }
 622
 623                 fclose(f);
 624
 625                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 626                         free(dump);
 627                         goto oom;
 628                 }
 629
 630                 free(dump);
 631         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 632                 const char *name;
 633                 dbus_bool_t cleanup;
 634                 Snapshot *s;
 635
 636                 if (!dbus_message_get_args(
 637                                     message,
 638                                     &error,
 639                                     DBUS_TYPE_STRING, &name,
 640                                     DBUS_TYPE_BOOLEAN, &cleanup,
 641                                     DBUS_TYPE_INVALID))
 642                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 643
 644                 if (name && name[0] == 0)
 645                         name = NULL;
 646
 647                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 648                         return bus_send_error_reply(m, connection, message, &error, r);
 649
 650                 if (!(reply = dbus_message_new_method_return(message)))
 651                         goto oom;
 652
 653                 if (!(path = unit_dbus_path(UNIT(s))))
 654                         goto oom;
 655
 656                 if (!dbus_message_append_args(
 657                                     reply,
 658                                     DBUS_TYPE_OBJECT_PATH, &path,
 659                                     DBUS_TYPE_INVALID))
 660                         goto oom;
 661
 662         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 663                 char *introspection = NULL;
 664                 FILE *f;
 665                 Iterator i;
 666                 Unit *u;
 667                 Job *j;
 668                 const char *k;
 669                 size_t size;
 670
 671                 if (!(reply = dbus_message_new_method_return(message)))
 672                         goto oom;
 673
 674                 /* We roll our own introspection code here, instead of
 675                  * relying on bus_default_message_handler() because we
 676                  * need to generate our introspection string
 677                  * dynamically. */
 678
 679                 if (!(f = open_memstream(&introspection, &size)))
 680                         goto oom;
 681
 682                 fputs(INTROSPECTION_BEGIN, f);
 683
 684                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 685                         char *p;
 686
 687                         if (k != u->meta.id)
 688                                 continue;
 689
 690                         if (!(p = bus_path_escape(k))) {
 691                                 fclose(f);
 692                                 free(introspection);
 693                                 goto oom;
 694                         }
 695
 696                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 697                         free(p);
 698                 }
 699
 700                 HASHMAP_FOREACH(j, m->jobs, i)
 701                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 702
 703                 fputs(INTROSPECTION_END, f);
 704
 705                 if (ferror(f)) {
 706                         fclose(f);
 707                         free(introspection);
 708                         goto oom;
 709                 }
 710
 711                 fclose(f);
 712
 713                 if (!introspection)
 714                         goto oom;
 715
 716                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 717                         free(introspection);
 718                         goto oom;
 719                 }
 720
 721                 free(introspection);
 722
 723         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 724
 725                 assert(!m->queued_message);
 726
 727                 /* Instead of sending the reply back right away, we
 728                  * just remember that we need to and then send it
 729                  * after the reload is finished. That way the caller
 730                  * knows when the reload finished. */
 731
 732                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 733                         goto oom;
 734
 735                 m->queued_message_connection = connection;
 736                 m->exit_code = MANAGER_RELOAD;
 737
 738         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 739
 740                 if (!(reply = dbus_message_new_method_return(message)))
 741                         goto oom;
 742
 743                 m->exit_code = MANAGER_REEXECUTE;
 744
 745         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 746
 747                 if (m->running_as == MANAGER_SYSTEM) {
 748                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
 749                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 750                 }
 751
 752                 if (!(reply = dbus_message_new_method_return(message)))
 753                         goto oom;
 754
 755                 m->exit_code = MANAGER_EXIT;
 756
 757         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 758                 char **l = NULL, **e = NULL;
 759
 760                 if ((r = bus_parse_strv(message, &l)) < 0) {
 761                         if (r == -ENOMEM)
 762                                 goto oom;
 763
 764                         return bus_send_error_reply(m, connection, message, NULL, r);
 765                 }
 766
 767                 e = strv_env_merge(2, m->environment, l);
 768                 strv_free(l);
 769
 770                 if (!e)
 771                         goto oom;
 772
 773                 if (!(reply = dbus_message_new_method_return(message))) {
 774                         strv_free(e);
 775                         goto oom;
 776                 }
 777
 778                 strv_free(m->environment);
 779                 m->environment = e;
 780
 781         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 782                 char **l = NULL, **e = NULL;
 783
 784                 if ((r = bus_parse_strv(message, &l)) < 0) {
 785                         if (r == -ENOMEM)
 786                                 goto oom;
 787
 788                         return bus_send_error_reply(m, connection, message, NULL, r);
 789                 }
 790
 791                 e = strv_env_delete(m->environment, 1, l);
 792                 strv_free(l);
 793
 794                 if (!e)
 795                         goto oom;
 796
 797                 if (!(reply = dbus_message_new_method_return(message)))
 798                         goto oom;
 799
 800                 strv_free(m->environment);
 801                 m->environment = e;
 802
 803         } else
 804                 return bus_default_message_handler(m, connection, message, NULL, properties);
 805
 806         if (job_type != _JOB_TYPE_INVALID) {
 807                 const char *name, *smode;
 808                 JobMode mode;
 809                 Job *j;
 810                 Unit *u;
 811
 812                 if (!dbus_message_get_args(
 813                                     message,
 814                                     &error,
 815                                     DBUS_TYPE_STRING, &name,
 816                                     DBUS_TYPE_STRING, &smode,
 817                                     DBUS_TYPE_INVALID))
 818                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 819
 820                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
 821                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
 822                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 823                 }
 824
 825                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 826                         return bus_send_error_reply(m, connection, message, &error, r);
 827
 828                 if (reload_if_possible && unit_can_reload(u)) {
 829                         if (job_type == JOB_RESTART)
 830                                 job_type = JOB_RELOAD_OR_START;
 831                         else if (job_type == JOB_TRY_RESTART)
 832                                 job_type = JOB_RELOAD;
 833                 }
 834
 835                 if ((job_type == JOB_START && u->meta.refuse_manual_start) ||
 836                     (job_type == JOB_STOP && u->meta.refuse_manual_stop) ||
 837                     ((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&
 838                      (u->meta.refuse_manual_start || u->meta.refuse_manual_stop))) {
 839                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested by dependency only.");
 840                         return bus_send_error_reply(m, connection, message, &error, -EPERM);
 841                 }
 842
 843                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
 844                         return bus_send_error_reply(m, connection, message, &error, r);
 845
 846                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
 847                         goto oom;
 848
 849                 j->bus = connection;
 850
 851                 if (!(reply = dbus_message_new_method_return(message)))
 852                         goto oom;
 853
 854                 if (!(path = job_dbus_path(j)))
 855                         goto oom;
 856
 857                 if (!dbus_message_append_args(
 858                                     reply,
 859                                     DBUS_TYPE_OBJECT_PATH, &path,
 860                                     DBUS_TYPE_INVALID))
 861                         goto oom;
 862         }
 863
 864         free(path);
 865
 866         if (reply) {
 867                 if (!dbus_connection_send(connection, reply, NULL))
 868                         goto oom;
 869
 870                 dbus_message_unref(reply);
 871         }
 872
 873         return DBUS_HANDLER_RESULT_HANDLED;
 874
 875 oom:
 876         free(path);
 877
 878         if (reply)
 879                 dbus_message_unref(reply);
 880
 881         dbus_error_free(&error);
 882
 883         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 884 }
 885
 886 const DBusObjectPathVTable bus_manager_vtable = {
 887         .message_function = bus_manager_message_handler
 888 };