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 int bus_manager_append_progress(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 225         double d;
 226
 227         assert(m);
 228         assert(i);
 229         assert(property);
 230
 231         if (dual_timestamp_is_set(&m->finish_timestamp))
 232                 d = 1.0;
 233         else
 234                 d = 1.0 - ((double) hashmap_size(m->jobs) / (double) m->n_installed_jobs);
 235
 236         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_DOUBLE, &d))
 237                 return -ENOMEM;
 238
 239         return 0;
 240 }
 241
 242 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 243         const char *s;
 244
 245         assert(m);
 246
 247         if ((s = dbus_message_get_sender(m)))
 248                 return s;
 249
 250         /* When the message came in from a direct connection the
 251          * message will have no sender. We fix that here. */
 252
 253         return ":no-sender";
 254 }
 255
 256 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 257         Manager *m = data;
 258
 259         const BusProperty properties[] = {
 260                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 261                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 262                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 263                 { "org.freedesktop.systemd1.Manager", "FinishTimestamp", bus_property_append_uint64,  "t",  &m->finish_timestamp.realtime },
 264                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 265                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 266                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 267                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 268                 { "org.freedesktop.systemd1.Manager", "NInstalledJobs",bus_property_append_uint32,    "u",  &m->n_installed_jobs },
 269                 { "org.freedesktop.systemd1.Manager", "Progress",      bus_manager_append_progress,   "d",  NULL               },
 270                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 271                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 272                 { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
 273                 { "org.freedesktop.systemd1.Manager", "SysVConsole",   bus_property_append_bool,      "b",  &m->sysv_console   },
 274                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 275                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 276                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 277                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 278                 { "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
 279                 { "org.freedesktop.systemd1.Manager", "MountAuto",     bus_property_append_bool,      "b",  &m->mount_auto     },
 280                 { "org.freedesktop.systemd1.Manager", "SwapAuto",      bus_property_append_bool,      "b",  &m->swap_auto     },
 281                 { NULL, NULL, NULL, NULL, NULL }
 282         };
 283
 284         int r;
 285         DBusError error;
 286         DBusMessage *reply = NULL;
 287         char * path = NULL;
 288         JobType job_type = _JOB_TYPE_INVALID;
 289         bool reload_if_possible = false;
 290
 291         assert(connection);
 292         assert(message);
 293         assert(m);
 294
 295         dbus_error_init(&error);
 296
 297         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 298                 const char *name;
 299                 Unit *u;
 300
 301                 if (!dbus_message_get_args(
 302                                     message,
 303                                     &error,
 304                                     DBUS_TYPE_STRING, &name,
 305                                     DBUS_TYPE_INVALID))
 306                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 307
 308                 if (!(u = manager_get_unit(m, name))) {
 309                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 310                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 311                 }
 312
 313                 if (!(reply = dbus_message_new_method_return(message)))
 314                         goto oom;
 315
 316                 if (!(path = unit_dbus_path(u)))
 317                         goto oom;
 318
 319                 if (!dbus_message_append_args(
 320                                     reply,
 321                                     DBUS_TYPE_OBJECT_PATH, &path,
 322                                     DBUS_TYPE_INVALID))
 323                         goto oom;
 324         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnitByPID")) {
 325                 Unit *u;
 326                 uint32_t pid;
 327
 328                 if (!dbus_message_get_args(
 329                                     message,
 330                                     &error,
 331                                     DBUS_TYPE_UINT32, &pid,
 332                                     DBUS_TYPE_INVALID))
 333                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 334
 335                 if (!(u = cgroup_unit_by_pid(m, (pid_t) pid))) {
 336                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "No unit for PID %lu is loaded.", (unsigned long) pid);
 337                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 338                 }
 339
 340                 if (!(reply = dbus_message_new_method_return(message)))
 341                         goto oom;
 342
 343                 if (!(path = unit_dbus_path(u)))
 344                         goto oom;
 345
 346                 if (!dbus_message_append_args(
 347                                     reply,
 348                                     DBUS_TYPE_OBJECT_PATH, &path,
 349                                     DBUS_TYPE_INVALID))
 350                         goto oom;
 351         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 352                 const char *name;
 353                 Unit *u;
 354
 355                 if (!dbus_message_get_args(
 356                                     message,
 357                                     &error,
 358                                     DBUS_TYPE_STRING, &name,
 359                                     DBUS_TYPE_INVALID))
 360                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 361
 362                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 363                         return bus_send_error_reply(m, connection, message, &error, r);
 364
 365                 if (!(reply = dbus_message_new_method_return(message)))
 366                         goto oom;
 367
 368                 if (!(path = unit_dbus_path(u)))
 369                         goto oom;
 370
 371                 if (!dbus_message_append_args(
 372                                     reply,
 373                                     DBUS_TYPE_OBJECT_PATH, &path,
 374                                     DBUS_TYPE_INVALID))
 375                         goto oom;
 376
 377         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 378                 job_type = JOB_START;
 379         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 380                 job_type = JOB_STOP;
 381         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 382                 job_type = JOB_RELOAD;
 383         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 384                 job_type = JOB_RESTART;
 385         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 386                 job_type = JOB_TRY_RESTART;
 387         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
 388                 reload_if_possible = true;
 389                 job_type = JOB_RESTART;
 390         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
 391                 reload_if_possible = true;
 392                 job_type = JOB_TRY_RESTART;
 393         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 394                 uint32_t id;
 395                 Job *j;
 396
 397                 if (!dbus_message_get_args(
 398                                     message,
 399                                     &error,
 400                                     DBUS_TYPE_UINT32, &id,
 401                                     DBUS_TYPE_INVALID))
 402                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 403
 404                 if (!(j = manager_get_job(m, id))) {
 405                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 406                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 407                 }
 408
 409                 if (!(reply = dbus_message_new_method_return(message)))
 410                         goto oom;
 411
 412                 if (!(path = job_dbus_path(j)))
 413                         goto oom;
 414
 415                 if (!dbus_message_append_args(
 416                                     reply,
 417                                     DBUS_TYPE_OBJECT_PATH, &path,
 418                                     DBUS_TYPE_INVALID))
 419                         goto oom;
 420
 421         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 422
 423                 manager_clear_jobs(m);
 424
 425                 if (!(reply = dbus_message_new_method_return(message)))
 426                         goto oom;
 427
 428         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailed")) {
 429
 430                 manager_reset_failed(m);
 431
 432                 if (!(reply = dbus_message_new_method_return(message)))
 433                         goto oom;
 434
 435         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailedUnit")) {
 436                 const char *name;
 437                 Unit *u;
 438
 439                 if (!dbus_message_get_args(
 440                                     message,
 441                                     &error,
 442                                     DBUS_TYPE_STRING, &name,
 443                                     DBUS_TYPE_INVALID))
 444                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 445
 446                 if (!(u = manager_get_unit(m, name))) {
 447                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 448                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 449                 }
 450
 451                 unit_reset_failed(u);
 452
 453                 if (!(reply = dbus_message_new_method_return(message)))
 454                         goto oom;
 455
 456         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 457                 DBusMessageIter iter, sub;
 458                 Iterator i;
 459                 Unit *u;
 460                 const char *k;
 461
 462                 if (!(reply = dbus_message_new_method_return(message)))
 463                         goto oom;
 464
 465                 dbus_message_iter_init_append(reply, &iter);
 466
 467                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssssouso)", &sub))
 468                         goto oom;
 469
 470                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 471                         char *u_path, *j_path;
 472                         const char *description, *load_state, *active_state, *sub_state, *sjob_type, *following;
 473                         DBusMessageIter sub2;
 474                         uint32_t job_id;
 475                         Unit *f;
 476
 477                         if (k != u->meta.id)
 478                                 continue;
 479
 480                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 481                                 goto oom;
 482
 483                         description = unit_description(u);
 484                         load_state = unit_load_state_to_string(u->meta.load_state);
 485                         active_state = unit_active_state_to_string(unit_active_state(u));
 486                         sub_state = unit_sub_state_to_string(u);
 487
 488                         f = unit_following(u);
 489                         following = f ? f->meta.id : "";
 490
 491                         if (!(u_path = unit_dbus_path(u)))
 492                                 goto oom;
 493
 494                         if (u->meta.job) {
 495                                 job_id = (uint32_t) u->meta.job->id;
 496
 497                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 498                                         free(u_path);
 499                                         goto oom;
 500                                 }
 501
 502                                 sjob_type = job_type_to_string(u->meta.job->type);
 503                         } else {
 504                                 job_id = 0;
 505                                 j_path = u_path;
 506                                 sjob_type = "";
 507                         }
 508
 509                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 510                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 511                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 512                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 513                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 514                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &following) ||
 515                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 516                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 517                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 518                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 519                                 free(u_path);
 520                                 if (u->meta.job)
 521                                         free(j_path);
 522                                 goto oom;
 523                         }
 524
 525                         free(u_path);
 526                         if (u->meta.job)
 527                                 free(j_path);
 528
 529                         if (!dbus_message_iter_close_container(&sub, &sub2))
 530                                 goto oom;
 531                 }
 532
 533                 if (!dbus_message_iter_close_container(&iter, &sub))
 534                         goto oom;
 535
 536         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 537                 DBusMessageIter iter, sub;
 538                 Iterator i;
 539                 Job *j;
 540
 541                 if (!(reply = dbus_message_new_method_return(message)))
 542                         goto oom;
 543
 544                 dbus_message_iter_init_append(reply, &iter);
 545
 546                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 547                         goto oom;
 548
 549                 HASHMAP_FOREACH(j, m->jobs, i) {
 550                         char *u_path, *j_path;
 551                         const char *state, *type;
 552                         uint32_t id;
 553                         DBusMessageIter sub2;
 554
 555                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 556                                 goto oom;
 557
 558                         id = (uint32_t) j->id;
 559                         state = job_state_to_string(j->state);
 560                         type = job_type_to_string(j->type);
 561
 562                         if (!(j_path = job_dbus_path(j)))
 563                                 goto oom;
 564
 565                         if (!(u_path = unit_dbus_path(j->unit))) {
 566                                 free(j_path);
 567                                 goto oom;
 568                         }
 569
 570                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 571                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 572                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 573                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 574                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 575                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 576                                 free(j_path);
 577                                 free(u_path);
 578                                 goto oom;
 579                         }
 580
 581                         free(j_path);
 582                         free(u_path);
 583
 584                         if (!dbus_message_iter_close_container(&sub, &sub2))
 585                                 goto oom;
 586                 }
 587
 588                 if (!dbus_message_iter_close_container(&iter, &sub))
 589                         goto oom;
 590
 591         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 592                 char *client;
 593                 Set *s;
 594
 595                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 596                         if (!(s = set_new(string_hash_func, string_compare_func)))
 597                                 goto oom;
 598
 599                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 600                                 set_free(s);
 601                                 goto oom;
 602                         }
 603                 }
 604
 605                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 606                         goto oom;
 607
 608                 if ((r = set_put(s, client)) < 0) {
 609                         free(client);
 610                         return bus_send_error_reply(m, connection, message, NULL, r);
 611                 }
 612
 613                 if (!(reply = dbus_message_new_method_return(message)))
 614                         goto oom;
 615
 616         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 617                 char *client;
 618
 619                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 620                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 621                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 622                 }
 623
 624                 free(client);
 625
 626                 if (!(reply = dbus_message_new_method_return(message)))
 627                         goto oom;
 628
 629         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 630                 FILE *f;
 631                 char *dump = NULL;
 632                 size_t size;
 633
 634                 if (!(reply = dbus_message_new_method_return(message)))
 635                         goto oom;
 636
 637                 if (!(f = open_memstream(&dump, &size)))
 638                         goto oom;
 639
 640                 manager_dump_units(m, f, NULL);
 641                 manager_dump_jobs(m, f, NULL);
 642
 643                 if (ferror(f)) {
 644                         fclose(f);
 645                         free(dump);
 646                         goto oom;
 647                 }
 648
 649                 fclose(f);
 650
 651                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 652                         free(dump);
 653                         goto oom;
 654                 }
 655
 656                 free(dump);
 657         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 658                 const char *name;
 659                 dbus_bool_t cleanup;
 660                 Snapshot *s;
 661
 662                 if (!dbus_message_get_args(
 663                                     message,
 664                                     &error,
 665                                     DBUS_TYPE_STRING, &name,
 666                                     DBUS_TYPE_BOOLEAN, &cleanup,
 667                                     DBUS_TYPE_INVALID))
 668                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 669
 670                 if (name && name[0] == 0)
 671                         name = NULL;
 672
 673                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 674                         return bus_send_error_reply(m, connection, message, &error, r);
 675
 676                 if (!(reply = dbus_message_new_method_return(message)))
 677                         goto oom;
 678
 679                 if (!(path = unit_dbus_path(UNIT(s))))
 680                         goto oom;
 681
 682                 if (!dbus_message_append_args(
 683                                     reply,
 684                                     DBUS_TYPE_OBJECT_PATH, &path,
 685                                     DBUS_TYPE_INVALID))
 686                         goto oom;
 687
 688         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 689                 char *introspection = NULL;
 690                 FILE *f;
 691                 Iterator i;
 692                 Unit *u;
 693                 Job *j;
 694                 const char *k;
 695                 size_t size;
 696
 697                 if (!(reply = dbus_message_new_method_return(message)))
 698                         goto oom;
 699
 700                 /* We roll our own introspection code here, instead of
 701                  * relying on bus_default_message_handler() because we
 702                  * need to generate our introspection string
 703                  * dynamically. */
 704
 705                 if (!(f = open_memstream(&introspection, &size)))
 706                         goto oom;
 707
 708                 fputs(INTROSPECTION_BEGIN, f);
 709
 710                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 711                         char *p;
 712
 713                         if (k != u->meta.id)
 714                                 continue;
 715
 716                         if (!(p = bus_path_escape(k))) {
 717                                 fclose(f);
 718                                 free(introspection);
 719                                 goto oom;
 720                         }
 721
 722                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 723                         free(p);
 724                 }
 725
 726                 HASHMAP_FOREACH(j, m->jobs, i)
 727                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 728
 729                 fputs(INTROSPECTION_END, f);
 730
 731                 if (ferror(f)) {
 732                         fclose(f);
 733                         free(introspection);
 734                         goto oom;
 735                 }
 736
 737                 fclose(f);
 738
 739                 if (!introspection)
 740                         goto oom;
 741
 742                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 743                         free(introspection);
 744                         goto oom;
 745                 }
 746
 747                 free(introspection);
 748
 749         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 750
 751                 assert(!m->queued_message);
 752
 753                 /* Instead of sending the reply back right away, we
 754                  * just remember that we need to and then send it
 755                  * after the reload is finished. That way the caller
 756                  * knows when the reload finished. */
 757
 758                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 759                         goto oom;
 760
 761                 m->queued_message_connection = connection;
 762                 m->exit_code = MANAGER_RELOAD;
 763
 764         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 765
 766                 if (!(reply = dbus_message_new_method_return(message)))
 767                         goto oom;
 768
 769                 m->exit_code = MANAGER_REEXECUTE;
 770
 771         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 772
 773                 if (m->running_as == MANAGER_SYSTEM) {
 774                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
 775                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 776                 }
 777
 778                 if (!(reply = dbus_message_new_method_return(message)))
 779                         goto oom;
 780
 781                 m->exit_code = MANAGER_EXIT;
 782
 783         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 784                 char **l = NULL, **e = NULL;
 785
 786                 if ((r = bus_parse_strv(message, &l)) < 0) {
 787                         if (r == -ENOMEM)
 788                                 goto oom;
 789
 790                         return bus_send_error_reply(m, connection, message, NULL, r);
 791                 }
 792
 793                 e = strv_env_merge(2, m->environment, l);
 794                 strv_free(l);
 795
 796                 if (!e)
 797                         goto oom;
 798
 799                 if (!(reply = dbus_message_new_method_return(message))) {
 800                         strv_free(e);
 801                         goto oom;
 802                 }
 803
 804                 strv_free(m->environment);
 805                 m->environment = e;
 806
 807         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 808                 char **l = NULL, **e = NULL;
 809
 810                 if ((r = bus_parse_strv(message, &l)) < 0) {
 811                         if (r == -ENOMEM)
 812                                 goto oom;
 813
 814                         return bus_send_error_reply(m, connection, message, NULL, r);
 815                 }
 816
 817                 e = strv_env_delete(m->environment, 1, l);
 818                 strv_free(l);
 819
 820                 if (!e)
 821                         goto oom;
 822
 823                 if (!(reply = dbus_message_new_method_return(message)))
 824                         goto oom;
 825
 826                 strv_free(m->environment);
 827                 m->environment = e;
 828
 829         } else
 830                 return bus_default_message_handler(m, connection, message, NULL, properties);
 831
 832         if (job_type != _JOB_TYPE_INVALID) {
 833                 const char *name, *smode;
 834                 JobMode mode;
 835                 Job *j;
 836                 Unit *u;
 837
 838                 if (!dbus_message_get_args(
 839                                     message,
 840                                     &error,
 841                                     DBUS_TYPE_STRING, &name,
 842                                     DBUS_TYPE_STRING, &smode,
 843                                     DBUS_TYPE_INVALID))
 844                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 845
 846                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
 847                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
 848                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 849                 }
 850
 851                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 852                         return bus_send_error_reply(m, connection, message, &error, r);
 853
 854                 if (reload_if_possible && unit_can_reload(u)) {
 855                         if (job_type == JOB_RESTART)
 856                                 job_type = JOB_RELOAD_OR_START;
 857                         else if (job_type == JOB_TRY_RESTART)
 858                                 job_type = JOB_RELOAD;
 859                 }
 860
 861                 if ((job_type == JOB_START && u->meta.refuse_manual_start) ||
 862                     (job_type == JOB_STOP && u->meta.refuse_manual_stop) ||
 863                     ((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&
 864                      (u->meta.refuse_manual_start || u->meta.refuse_manual_stop))) {
 865                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested by dependency only.");
 866                         return bus_send_error_reply(m, connection, message, &error, -EPERM);
 867                 }
 868
 869                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
 870                         return bus_send_error_reply(m, connection, message, &error, r);
 871
 872                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
 873                         goto oom;
 874
 875                 j->bus = connection;
 876
 877                 if (!(reply = dbus_message_new_method_return(message)))
 878                         goto oom;
 879
 880                 if (!(path = job_dbus_path(j)))
 881                         goto oom;
 882
 883                 if (!dbus_message_append_args(
 884                                     reply,
 885                                     DBUS_TYPE_OBJECT_PATH, &path,
 886                                     DBUS_TYPE_INVALID))
 887                         goto oom;
 888         }
 889
 890         free(path);
 891
 892         if (reply) {
 893                 if (!dbus_connection_send(connection, reply, NULL))
 894                         goto oom;
 895
 896                 dbus_message_unref(reply);
 897         }
 898
 899         return DBUS_HANDLER_RESULT_HANDLED;
 900
 901 oom:
 902         free(path);
 903
 904         if (reply)
 905                 dbus_message_unref(reply);
 906
 907         dbus_error_free(&error);
 908
 909         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 910 }
 911
 912 const DBusObjectPathVTable bus_manager_vtable = {
 913         .message_function = bus_manager_message_handler
 914 };