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=\"ResetFailedUnit\">\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=\"ResetFailed\"/>\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=\"NInstalledJobs\" type=\"u\" access=\"read\"/>\n" \
 136         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
 137         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
 138         "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
 139         "  <property name=\"SysVConsole\" type=\"b\" access=\"read\"/>\n" \
 140         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
 141         "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
 142         "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n" \
 143         "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
 144         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 145         "  <property name=\"MountAuto\" type=\"b\" access=\"read\"/>\n" \
 146         "  <property name=\"SwapAuto\" type=\"b\" access=\"read\"/>\n"  \
 147         " </interface>\n"
 148
 149 #define INTROSPECTION_BEGIN                                             \
 150         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 151         "<node>\n"                                                      \
 152         BUS_MANAGER_INTERFACE                                           \
 153         BUS_PROPERTIES_INTERFACE                                        \
 154         BUS_PEER_INTERFACE                                              \
 155         BUS_INTROSPECTABLE_INTERFACE
 156
 157 #define INTROSPECTION_END                                               \
 158         "</node>\n"
 159
 160 const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
 161
 162 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 163
 164 static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 165         const char *t;
 166
 167         assert(m);
 168         assert(i);
 169         assert(property);
 170
 171         t = log_target_to_string(log_get_target());
 172
 173         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 174                 return -ENOMEM;
 175
 176         return 0;
 177 }
 178
 179 static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 180         const char *t;
 181
 182         assert(m);
 183         assert(i);
 184         assert(property);
 185
 186         t = log_level_to_string(log_get_max_level());
 187
 188         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 189                 return -ENOMEM;
 190
 191         return 0;
 192 }
 193
 194 static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 195         uint32_t u;
 196
 197         assert(m);
 198         assert(i);
 199         assert(property);
 200
 201         u = hashmap_size(m->units);
 202
 203         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 204                 return -ENOMEM;
 205
 206         return 0;
 207 }
 208
 209 static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 210         uint32_t u;
 211
 212         assert(m);
 213         assert(i);
 214         assert(property);
 215
 216         u = hashmap_size(m->jobs);
 217
 218         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 219                 return -ENOMEM;
 220
 221         return 0;
 222 }
 223
 224 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 225         const char *s;
 226
 227         assert(m);
 228
 229         if ((s = dbus_message_get_sender(m)))
 230                 return s;
 231
 232         /* When the message came in from a direct connection the
 233          * message will have no sender. We fix that here. */
 234
 235         return ":no-sender";
 236 }
 237
 238 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 239         Manager *m = data;
 240
 241         const BusProperty properties[] = {
 242                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 243                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 244                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 245                 { "org.freedesktop.systemd1.Manager", "FinishTimestamp", bus_property_append_uint64,  "t",  &m->finish_timestamp.realtime },
 246                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 247                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 248                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 249                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 250                 { "org.freedesktop.systemd1.Manager", "NInstalledJobs",bus_property_append_uint32,    "u",  &m->n_installed_jobs },
 251                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 252                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 253                 { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
 254                 { "org.freedesktop.systemd1.Manager", "SysVConsole",   bus_property_append_bool,      "b",  &m->sysv_console   },
 255                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 256                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 257                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 258                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 259                 { "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
 260                 { "org.freedesktop.systemd1.Manager", "MountAuto",     bus_property_append_bool,      "b",  &m->mount_auto     },
 261                 { "org.freedesktop.systemd1.Manager", "SwapAuto",      bus_property_append_bool,      "b",  &m->swap_auto     },
 262                 { NULL, NULL, NULL, NULL, NULL }
 263         };
 264
 265         int r;
 266         DBusError error;
 267         DBusMessage *reply = NULL;
 268         char * path = NULL;
 269         JobType job_type = _JOB_TYPE_INVALID;
 270         bool reload_if_possible = false;
 271
 272         assert(connection);
 273         assert(message);
 274         assert(m);
 275
 276         dbus_error_init(&error);
 277
 278         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 279                 const char *name;
 280                 Unit *u;
 281
 282                 if (!dbus_message_get_args(
 283                                     message,
 284                                     &error,
 285                                     DBUS_TYPE_STRING, &name,
 286                                     DBUS_TYPE_INVALID))
 287                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 288
 289                 if (!(u = manager_get_unit(m, name))) {
 290                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 291                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 292                 }
 293
 294                 if (!(reply = dbus_message_new_method_return(message)))
 295                         goto oom;
 296
 297                 if (!(path = unit_dbus_path(u)))
 298                         goto oom;
 299
 300                 if (!dbus_message_append_args(
 301                                     reply,
 302                                     DBUS_TYPE_OBJECT_PATH, &path,
 303                                     DBUS_TYPE_INVALID))
 304                         goto oom;
 305         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnitByPID")) {
 306                 Unit *u;
 307                 uint32_t pid;
 308
 309                 if (!dbus_message_get_args(
 310                                     message,
 311                                     &error,
 312                                     DBUS_TYPE_UINT32, &pid,
 313                                     DBUS_TYPE_INVALID))
 314                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 315
 316                 if (!(u = cgroup_unit_by_pid(m, (pid_t) pid))) {
 317                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "No unit for PID %lu is loaded.", (unsigned long) pid);
 318                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 319                 }
 320
 321                 if (!(reply = dbus_message_new_method_return(message)))
 322                         goto oom;
 323
 324                 if (!(path = unit_dbus_path(u)))
 325                         goto oom;
 326
 327                 if (!dbus_message_append_args(
 328                                     reply,
 329                                     DBUS_TYPE_OBJECT_PATH, &path,
 330                                     DBUS_TYPE_INVALID))
 331                         goto oom;
 332         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 333                 const char *name;
 334                 Unit *u;
 335
 336                 if (!dbus_message_get_args(
 337                                     message,
 338                                     &error,
 339                                     DBUS_TYPE_STRING, &name,
 340                                     DBUS_TYPE_INVALID))
 341                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 342
 343                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 344                         return bus_send_error_reply(m, connection, message, &error, r);
 345
 346                 if (!(reply = dbus_message_new_method_return(message)))
 347                         goto oom;
 348
 349                 if (!(path = unit_dbus_path(u)))
 350                         goto oom;
 351
 352                 if (!dbus_message_append_args(
 353                                     reply,
 354                                     DBUS_TYPE_OBJECT_PATH, &path,
 355                                     DBUS_TYPE_INVALID))
 356                         goto oom;
 357
 358         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 359                 job_type = JOB_START;
 360         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 361                 job_type = JOB_STOP;
 362         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 363                 job_type = JOB_RELOAD;
 364         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 365                 job_type = JOB_RESTART;
 366         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 367                 job_type = JOB_TRY_RESTART;
 368         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
 369                 reload_if_possible = true;
 370                 job_type = JOB_RESTART;
 371         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
 372                 reload_if_possible = true;
 373                 job_type = JOB_TRY_RESTART;
 374         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 375                 uint32_t id;
 376                 Job *j;
 377
 378                 if (!dbus_message_get_args(
 379                                     message,
 380                                     &error,
 381                                     DBUS_TYPE_UINT32, &id,
 382                                     DBUS_TYPE_INVALID))
 383                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 384
 385                 if (!(j = manager_get_job(m, id))) {
 386                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 387                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 388                 }
 389
 390                 if (!(reply = dbus_message_new_method_return(message)))
 391                         goto oom;
 392
 393                 if (!(path = job_dbus_path(j)))
 394                         goto oom;
 395
 396                 if (!dbus_message_append_args(
 397                                     reply,
 398                                     DBUS_TYPE_OBJECT_PATH, &path,
 399                                     DBUS_TYPE_INVALID))
 400                         goto oom;
 401
 402         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 403
 404                 manager_clear_jobs(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", "ResetFailed")) {
 410
 411                 manager_reset_failed(m);
 412
 413                 if (!(reply = dbus_message_new_method_return(message)))
 414                         goto oom;
 415
 416         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailedUnit")) {
 417                 const char *name;
 418                 Unit *u;
 419
 420                 if (!dbus_message_get_args(
 421                                     message,
 422                                     &error,
 423                                     DBUS_TYPE_STRING, &name,
 424                                     DBUS_TYPE_INVALID))
 425                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 426
 427                 if (!(u = manager_get_unit(m, name))) {
 428                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 429                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 430                 }
 431
 432                 unit_reset_failed(u);
 433
 434                 if (!(reply = dbus_message_new_method_return(message)))
 435                         goto oom;
 436
 437         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 438                 DBusMessageIter iter, sub;
 439                 Iterator i;
 440                 Unit *u;
 441                 const char *k;
 442
 443                 if (!(reply = dbus_message_new_method_return(message)))
 444                         goto oom;
 445
 446                 dbus_message_iter_init_append(reply, &iter);
 447
 448                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssssouso)", &sub))
 449                         goto oom;
 450
 451                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 452                         char *u_path, *j_path;
 453                         const char *description, *load_state, *active_state, *sub_state, *sjob_type, *following;
 454                         DBusMessageIter sub2;
 455                         uint32_t job_id;
 456                         Unit *f;
 457
 458                         if (k != u->meta.id)
 459                                 continue;
 460
 461                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 462                                 goto oom;
 463
 464                         description = unit_description(u);
 465                         load_state = unit_load_state_to_string(u->meta.load_state);
 466                         active_state = unit_active_state_to_string(unit_active_state(u));
 467                         sub_state = unit_sub_state_to_string(u);
 468
 469                         f = unit_following(u);
 470                         following = f ? f->meta.id : "";
 471
 472                         if (!(u_path = unit_dbus_path(u)))
 473                                 goto oom;
 474
 475                         if (u->meta.job) {
 476                                 job_id = (uint32_t) u->meta.job->id;
 477
 478                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 479                                         free(u_path);
 480                                         goto oom;
 481                                 }
 482
 483                                 sjob_type = job_type_to_string(u->meta.job->type);
 484                         } else {
 485                                 job_id = 0;
 486                                 j_path = u_path;
 487                                 sjob_type = "";
 488                         }
 489
 490                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 491                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 492                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 493                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 494                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 495                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &following) ||
 496                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 497                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 498                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 499                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 500                                 free(u_path);
 501                                 if (u->meta.job)
 502                                         free(j_path);
 503                                 goto oom;
 504                         }
 505
 506                         free(u_path);
 507                         if (u->meta.job)
 508                                 free(j_path);
 509
 510                         if (!dbus_message_iter_close_container(&sub, &sub2))
 511                                 goto oom;
 512                 }
 513
 514                 if (!dbus_message_iter_close_container(&iter, &sub))
 515                         goto oom;
 516
 517         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 518                 DBusMessageIter iter, sub;
 519                 Iterator i;
 520                 Job *j;
 521
 522                 if (!(reply = dbus_message_new_method_return(message)))
 523                         goto oom;
 524
 525                 dbus_message_iter_init_append(reply, &iter);
 526
 527                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 528                         goto oom;
 529
 530                 HASHMAP_FOREACH(j, m->jobs, i) {
 531                         char *u_path, *j_path;
 532                         const char *state, *type;
 533                         uint32_t id;
 534                         DBusMessageIter sub2;
 535
 536                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 537                                 goto oom;
 538
 539                         id = (uint32_t) j->id;
 540                         state = job_state_to_string(j->state);
 541                         type = job_type_to_string(j->type);
 542
 543                         if (!(j_path = job_dbus_path(j)))
 544                                 goto oom;
 545
 546                         if (!(u_path = unit_dbus_path(j->unit))) {
 547                                 free(j_path);
 548                                 goto oom;
 549                         }
 550
 551                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 552                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 553                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 554                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 555                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 556                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 557                                 free(j_path);
 558                                 free(u_path);
 559                                 goto oom;
 560                         }
 561
 562                         free(j_path);
 563                         free(u_path);
 564
 565                         if (!dbus_message_iter_close_container(&sub, &sub2))
 566                                 goto oom;
 567                 }
 568
 569                 if (!dbus_message_iter_close_container(&iter, &sub))
 570                         goto oom;
 571
 572         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 573                 char *client;
 574                 Set *s;
 575
 576                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 577                         if (!(s = set_new(string_hash_func, string_compare_func)))
 578                                 goto oom;
 579
 580                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 581                                 set_free(s);
 582                                 goto oom;
 583                         }
 584                 }
 585
 586                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 587                         goto oom;
 588
 589                 if ((r = set_put(s, client)) < 0) {
 590                         free(client);
 591                         return bus_send_error_reply(m, connection, message, NULL, r);
 592                 }
 593
 594                 if (!(reply = dbus_message_new_method_return(message)))
 595                         goto oom;
 596
 597         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 598                 char *client;
 599
 600                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 601                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 602                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 603                 }
 604
 605                 free(client);
 606
 607                 if (!(reply = dbus_message_new_method_return(message)))
 608                         goto oom;
 609
 610         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 611                 FILE *f;
 612                 char *dump = NULL;
 613                 size_t size;
 614
 615                 if (!(reply = dbus_message_new_method_return(message)))
 616                         goto oom;
 617
 618                 if (!(f = open_memstream(&dump, &size)))
 619                         goto oom;
 620
 621                 manager_dump_units(m, f, NULL);
 622                 manager_dump_jobs(m, f, NULL);
 623
 624                 if (ferror(f)) {
 625                         fclose(f);
 626                         free(dump);
 627                         goto oom;
 628                 }
 629
 630                 fclose(f);
 631
 632                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 633                         free(dump);
 634                         goto oom;
 635                 }
 636
 637                 free(dump);
 638         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 639                 const char *name;
 640                 dbus_bool_t cleanup;
 641                 Snapshot *s;
 642
 643                 if (!dbus_message_get_args(
 644                                     message,
 645                                     &error,
 646                                     DBUS_TYPE_STRING, &name,
 647                                     DBUS_TYPE_BOOLEAN, &cleanup,
 648                                     DBUS_TYPE_INVALID))
 649                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 650
 651                 if (name && name[0] == 0)
 652                         name = NULL;
 653
 654                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 655                         return bus_send_error_reply(m, connection, message, &error, r);
 656
 657                 if (!(reply = dbus_message_new_method_return(message)))
 658                         goto oom;
 659
 660                 if (!(path = unit_dbus_path(UNIT(s))))
 661                         goto oom;
 662
 663                 if (!dbus_message_append_args(
 664                                     reply,
 665                                     DBUS_TYPE_OBJECT_PATH, &path,
 666                                     DBUS_TYPE_INVALID))
 667                         goto oom;
 668
 669         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 670                 char *introspection = NULL;
 671                 FILE *f;
 672                 Iterator i;
 673                 Unit *u;
 674                 Job *j;
 675                 const char *k;
 676                 size_t size;
 677
 678                 if (!(reply = dbus_message_new_method_return(message)))
 679                         goto oom;
 680
 681                 /* We roll our own introspection code here, instead of
 682                  * relying on bus_default_message_handler() because we
 683                  * need to generate our introspection string
 684                  * dynamically. */
 685
 686                 if (!(f = open_memstream(&introspection, &size)))
 687                         goto oom;
 688
 689                 fputs(INTROSPECTION_BEGIN, f);
 690
 691                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 692                         char *p;
 693
 694                         if (k != u->meta.id)
 695                                 continue;
 696
 697                         if (!(p = bus_path_escape(k))) {
 698                                 fclose(f);
 699                                 free(introspection);
 700                                 goto oom;
 701                         }
 702
 703                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 704                         free(p);
 705                 }
 706
 707                 HASHMAP_FOREACH(j, m->jobs, i)
 708                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 709
 710                 fputs(INTROSPECTION_END, f);
 711
 712                 if (ferror(f)) {
 713                         fclose(f);
 714                         free(introspection);
 715                         goto oom;
 716                 }
 717
 718                 fclose(f);
 719
 720                 if (!introspection)
 721                         goto oom;
 722
 723                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 724                         free(introspection);
 725                         goto oom;
 726                 }
 727
 728                 free(introspection);
 729
 730         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 731
 732                 assert(!m->queued_message);
 733
 734                 /* Instead of sending the reply back right away, we
 735                  * just remember that we need to and then send it
 736                  * after the reload is finished. That way the caller
 737                  * knows when the reload finished. */
 738
 739                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 740                         goto oom;
 741
 742                 m->queued_message_connection = connection;
 743                 m->exit_code = MANAGER_RELOAD;
 744
 745         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 746
 747                 if (!(reply = dbus_message_new_method_return(message)))
 748                         goto oom;
 749
 750                 m->exit_code = MANAGER_REEXECUTE;
 751
 752         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 753
 754                 if (m->running_as == MANAGER_SYSTEM) {
 755                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
 756                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 757                 }
 758
 759                 if (!(reply = dbus_message_new_method_return(message)))
 760                         goto oom;
 761
 762                 m->exit_code = MANAGER_EXIT;
 763
 764         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 765                 char **l = NULL, **e = NULL;
 766
 767                 if ((r = bus_parse_strv(message, &l)) < 0) {
 768                         if (r == -ENOMEM)
 769                                 goto oom;
 770
 771                         return bus_send_error_reply(m, connection, message, NULL, r);
 772                 }
 773
 774                 e = strv_env_merge(2, m->environment, l);
 775                 strv_free(l);
 776
 777                 if (!e)
 778                         goto oom;
 779
 780                 if (!(reply = dbus_message_new_method_return(message))) {
 781                         strv_free(e);
 782                         goto oom;
 783                 }
 784
 785                 strv_free(m->environment);
 786                 m->environment = e;
 787
 788         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 789                 char **l = NULL, **e = NULL;
 790
 791                 if ((r = bus_parse_strv(message, &l)) < 0) {
 792                         if (r == -ENOMEM)
 793                                 goto oom;
 794
 795                         return bus_send_error_reply(m, connection, message, NULL, r);
 796                 }
 797
 798                 e = strv_env_delete(m->environment, 1, l);
 799                 strv_free(l);
 800
 801                 if (!e)
 802                         goto oom;
 803
 804                 if (!(reply = dbus_message_new_method_return(message)))
 805                         goto oom;
 806
 807                 strv_free(m->environment);
 808                 m->environment = e;
 809
 810         } else
 811                 return bus_default_message_handler(m, connection, message, NULL, properties);
 812
 813         if (job_type != _JOB_TYPE_INVALID) {
 814                 const char *name, *smode;
 815                 JobMode mode;
 816                 Job *j;
 817                 Unit *u;
 818
 819                 if (!dbus_message_get_args(
 820                                     message,
 821                                     &error,
 822                                     DBUS_TYPE_STRING, &name,
 823                                     DBUS_TYPE_STRING, &smode,
 824                                     DBUS_TYPE_INVALID))
 825                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 826
 827                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
 828                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
 829                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 830                 }
 831
 832                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 833                         return bus_send_error_reply(m, connection, message, &error, r);
 834
 835                 if (reload_if_possible && unit_can_reload(u)) {
 836                         if (job_type == JOB_RESTART)
 837                                 job_type = JOB_RELOAD_OR_START;
 838                         else if (job_type == JOB_TRY_RESTART)
 839                                 job_type = JOB_RELOAD;
 840                 }
 841
 842                 if ((job_type == JOB_START && u->meta.refuse_manual_start) ||
 843                     (job_type == JOB_STOP && u->meta.refuse_manual_stop) ||
 844                     ((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&
 845                      (u->meta.refuse_manual_start || u->meta.refuse_manual_stop))) {
 846                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested by dependency only.");
 847                         return bus_send_error_reply(m, connection, message, &error, -EPERM);
 848                 }
 849
 850                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
 851                         return bus_send_error_reply(m, connection, message, &error, r);
 852
 853                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
 854                         goto oom;
 855
 856                 j->bus = connection;
 857
 858                 if (!(reply = dbus_message_new_method_return(message)))
 859                         goto oom;
 860
 861                 if (!(path = job_dbus_path(j)))
 862                         goto oom;
 863
 864                 if (!dbus_message_append_args(
 865                                     reply,
 866                                     DBUS_TYPE_OBJECT_PATH, &path,
 867                                     DBUS_TYPE_INVALID))
 868                         goto oom;
 869         }
 870
 871         free(path);
 872
 873         if (reply) {
 874                 if (!dbus_connection_send(connection, reply, NULL))
 875                         goto oom;
 876
 877                 dbus_message_unref(reply);
 878         }
 879
 880         return DBUS_HANDLER_RESULT_HANDLED;
 881
 882 oom:
 883         free(path);
 884
 885         if (reply)
 886                 dbus_message_unref(reply);
 887
 888         dbus_error_free(&error);
 889
 890         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 891 }
 892
 893 const DBusObjectPathVTable bus_manager_vtable = {
 894         .message_function = bus_manager_message_handler
 895 };