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