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_BEGIN                                     \
  31         " <interface name=\"org.freedesktop.systemd1.Manager\">\n"
  32
  33 #define BUS_MANAGER_INTERFACE_METHODS                                   \
  34         "  <method name=\"GetUnit\">\n"                                 \
  35         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  36         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  37         "  </method>\n"                                                 \
  38         "  <method name=\"GetUnitByPID\">\n"                            \
  39         "   <arg name=\"pid\" type=\"u\" direction=\"in\"/>\n"          \
  40         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  41         "  </method>\n"                                                 \
  42         "  <method name=\"LoadUnit\">\n"                                \
  43         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  44         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  45         "  </method>\n"                                                 \
  46         "  <method name=\"StartUnit\">\n"                               \
  47         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  48         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  49         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  50         "  </method>\n"                                                 \
  51         "  <method name=\"StopUnit\">\n"                                \
  52         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  53         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  54         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  55         "  </method>\n"                                                 \
  56         "  <method name=\"ReloadUnit\">\n"                              \
  57         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  58         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  59         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  60         "  </method>\n"                                                 \
  61         "  <method name=\"RestartUnit\">\n"                             \
  62         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  63         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  64         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  65         "  </method>\n"                                                 \
  66         "  <method name=\"TryRestartUnit\">\n"                          \
  67         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  68         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  69         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  70         "  </method>\n"                                                 \
  71         "  <method name=\"ReloadOrRestartUnit\">\n"                     \
  72         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  73         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  74         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  75         "  </method>\n"                                                 \
  76         "  <method name=\"ReloadOrTryRestartUnit\">\n"                  \
  77         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  78         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  79         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  80         "  </method>\n"                                                 \
  81         "  <method name=\"ResetFailedUnit\">\n"                         \
  82         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  83         "  </method>\n"                                                 \
  84         "  <method name=\"GetJob\">\n"                                  \
  85         "   <arg name=\"id\" type=\"u\" direction=\"in\"/>\n"           \
  86         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  87         "  </method>\n"                                                 \
  88         "  <method name=\"ClearJobs\"/>\n"                              \
  89         "  <method name=\"ResetFailed\"/>\n"                            \
  90         "  <method name=\"ListUnits\">\n"                               \
  91         "   <arg name=\"units\" type=\"a(ssssssouso)\" direction=\"out\"/>\n" \
  92         "  </method>\n"                                                 \
  93         "  <method name=\"ListJobs\">\n"                                \
  94         "   <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>\n" \
  95         "  </method>\n"                                                 \
  96         "  <method name=\"Subscribe\"/>\n"                              \
  97         "  <method name=\"Unsubscribe\"/>\n"                            \
  98         "  <method name=\"Dump\"/>\n"                                   \
  99         "  <method name=\"CreateSnapshot\">\n"                          \
 100         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
 101         "   <arg name=\"cleanup\" type=\"b\" direction=\"in\"/>\n"      \
 102         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
 103         "  </method>\n"                                                 \
 104         "  <method name=\"Reload\"/>\n"                                 \
 105         "  <method name=\"Reexecute\"/>\n"                              \
 106         "  <method name=\"Exit\"/>\n"                                   \
 107         "  <method name=\"Reboot\"/>\n"                                 \
 108         "  <method name=\"PowerOff\"/>\n"                               \
 109         "  <method name=\"Halt\"/>\n"                                   \
 110         "  <method name=\"KExec\"/>\n"                                  \
 111         "  <method name=\"SetEnvironment\">\n"                          \
 112         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 113         "  </method>\n"                                                 \
 114         "  <method name=\"UnsetEnvironment\">\n"                        \
 115         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 116         "  </method>\n"
 117
 118 #define BUS_MANAGER_INTERFACE_SIGNALS                                   \
 119         "  <signal name=\"UnitNew\">\n"                                 \
 120         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 121         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 122         "  </signal>\n"                                                 \
 123         "  <signal name=\"UnitRemoved\">\n"                             \
 124         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 125         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 126         "  </signal>\n"                                                 \
 127         "  <signal name=\"JobNew\">\n"                                  \
 128         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 129         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 130         "  </signal>\n"                                                 \
 131         "  <signal name=\"JobRemoved\">\n"                              \
 132         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 133         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 134         "   <arg name=\"success\" type=\"b\"/>\n"                       \
 135         "  </signal>"
 136
 137
 138 #define BUS_MANAGER_INTERFACE_PROPERTIES_GENERAL                        \
 139         "  <property name=\"Version\" type=\"s\" access=\"read\"/>\n"   \
 140         "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
 141         "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
 142         "  <property name=\"LogLevel\" type=\"s\" access=\"read\"/>\n"  \
 143         "  <property name=\"LogTarget\" type=\"s\" access=\"read\"/>\n" \
 144         "  <property name=\"NNames\" type=\"u\" access=\"read\"/>\n"    \
 145         "  <property name=\"NJobs\" type=\"u\" access=\"read\"/>\n"     \
 146         "  <property name=\"NInstalledJobs\" type=\"u\" access=\"read\"/>\n" \
 147         "  <property name=\"NFailedJobs\" type=\"u\" access=\"read\"/>\n" \
 148         "  <property name=\"Progress\" type=\"d\" access=\"read\"/>\n"  \
 149         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
 150         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
 151         "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
 152         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
 153         "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
 154         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 155         "  <property name=\"MountAuto\" type=\"b\" access=\"read\"/>\n" \
 156         "  <property name=\"SwapAuto\" type=\"b\" access=\"read\"/>\n"
 157
 158 #ifdef HAVE_SYSV_COMPAT
 159 #define BUS_MANAGER_INTERFACE_PROPERTIES_SYSV                           \
 160         "  <property name=\"SysVConsole\" type=\"b\" access=\"read\"/>\n" \
 161         "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
 162         "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n"
 163 #else
 164 #define BUS_MANAGER_INTERFACE_PROPERTIES_SYSV
 165 #endif
 166
 167 #define BUS_MANAGER_INTERFACE_END                                       \
 168         " </interface>\n"
 169
 170 #define BUS_MANAGER_INTERFACE                                           \
 171         BUS_MANAGER_INTERFACE_BEGIN                                     \
 172         BUS_MANAGER_INTERFACE_METHODS                                   \
 173         BUS_MANAGER_INTERFACE_SIGNALS                                   \
 174         BUS_MANAGER_INTERFACE_PROPERTIES_GENERAL                        \
 175         BUS_MANAGER_INTERFACE_PROPERTIES_SYSV                           \
 176         BUS_MANAGER_INTERFACE_END
 177
 178 #define INTROSPECTION_BEGIN                                             \
 179         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 180         "<node>\n"                                                      \
 181         BUS_MANAGER_INTERFACE                                           \
 182         BUS_PROPERTIES_INTERFACE                                        \
 183         BUS_PEER_INTERFACE                                              \
 184         BUS_INTROSPECTABLE_INTERFACE
 185
 186 #define INTROSPECTION_END                                               \
 187         "</node>\n"
 188
 189 const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
 190
 191 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 192
 193 static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 194         const char *t;
 195
 196         assert(m);
 197         assert(i);
 198         assert(property);
 199
 200         t = log_target_to_string(log_get_target());
 201
 202         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 203                 return -ENOMEM;
 204
 205         return 0;
 206 }
 207
 208 static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 209         const char *t;
 210
 211         assert(m);
 212         assert(i);
 213         assert(property);
 214
 215         t = log_level_to_string(log_get_max_level());
 216
 217         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 218                 return -ENOMEM;
 219
 220         return 0;
 221 }
 222
 223 static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 224         uint32_t u;
 225
 226         assert(m);
 227         assert(i);
 228         assert(property);
 229
 230         u = hashmap_size(m->units);
 231
 232         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 233                 return -ENOMEM;
 234
 235         return 0;
 236 }
 237
 238 static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 239         uint32_t u;
 240
 241         assert(m);
 242         assert(i);
 243         assert(property);
 244
 245         u = hashmap_size(m->jobs);
 246
 247         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 248                 return -ENOMEM;
 249
 250         return 0;
 251 }
 252
 253 static int bus_manager_append_progress(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 254         double d;
 255
 256         assert(m);
 257         assert(i);
 258         assert(property);
 259
 260         if (dual_timestamp_is_set(&m->finish_timestamp))
 261                 d = 1.0;
 262         else
 263                 d = 1.0 - ((double) hashmap_size(m->jobs) / (double) m->n_installed_jobs);
 264
 265         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_DOUBLE, &d))
 266                 return -ENOMEM;
 267
 268         return 0;
 269 }
 270
 271 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 272         const char *s;
 273
 274         assert(m);
 275
 276         if ((s = dbus_message_get_sender(m)))
 277                 return s;
 278
 279         /* When the message came in from a direct connection the
 280          * message will have no sender. We fix that here. */
 281
 282         return ":no-sender";
 283 }
 284
 285 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 286         Manager *m = data;
 287
 288         const BusProperty properties[] = {
 289                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 290                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 291                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 292                 { "org.freedesktop.systemd1.Manager", "FinishTimestamp", bus_property_append_uint64,  "t",  &m->finish_timestamp.realtime },
 293                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 294                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 295                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 296                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 297                 { "org.freedesktop.systemd1.Manager", "NInstalledJobs",bus_property_append_uint32,    "u",  &m->n_installed_jobs },
 298                 { "org.freedesktop.systemd1.Manager", "NFailedJobs",   bus_property_append_uint32,    "u",  &m->n_failed_jobs  },
 299                 { "org.freedesktop.systemd1.Manager", "Progress",      bus_manager_append_progress,   "d",  NULL               },
 300                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 301                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 302                 { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
 303                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 304                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 305                 { "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
 306                 { "org.freedesktop.systemd1.Manager", "MountAuto",     bus_property_append_bool,      "b",  &m->mount_auto     },
 307                 { "org.freedesktop.systemd1.Manager", "SwapAuto",      bus_property_append_bool,      "b",  &m->swap_auto     },
 308 #ifdef HAVE_SYSV_COMPAT
 309                 { "org.freedesktop.systemd1.Manager", "SysVConsole",   bus_property_append_bool,      "b",  &m->sysv_console   },
 310                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 311                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 312 #endif
 313                 { NULL, NULL, NULL, NULL, NULL }
 314         };
 315
 316         int r;
 317         DBusError error;
 318         DBusMessage *reply = NULL;
 319         char * path = NULL;
 320         JobType job_type = _JOB_TYPE_INVALID;
 321         bool reload_if_possible = false;
 322
 323         assert(connection);
 324         assert(message);
 325         assert(m);
 326
 327         dbus_error_init(&error);
 328
 329         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 330                 const char *name;
 331                 Unit *u;
 332
 333                 if (!dbus_message_get_args(
 334                                     message,
 335                                     &error,
 336                                     DBUS_TYPE_STRING, &name,
 337                                     DBUS_TYPE_INVALID))
 338                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 339
 340                 if (!(u = manager_get_unit(m, name))) {
 341                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 342                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 343                 }
 344
 345                 if (!(reply = dbus_message_new_method_return(message)))
 346                         goto oom;
 347
 348                 if (!(path = unit_dbus_path(u)))
 349                         goto oom;
 350
 351                 if (!dbus_message_append_args(
 352                                     reply,
 353                                     DBUS_TYPE_OBJECT_PATH, &path,
 354                                     DBUS_TYPE_INVALID))
 355                         goto oom;
 356         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnitByPID")) {
 357                 Unit *u;
 358                 uint32_t pid;
 359
 360                 if (!dbus_message_get_args(
 361                                     message,
 362                                     &error,
 363                                     DBUS_TYPE_UINT32, &pid,
 364                                     DBUS_TYPE_INVALID))
 365                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 366
 367                 if (!(u = cgroup_unit_by_pid(m, (pid_t) pid))) {
 368                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "No unit for PID %lu is loaded.", (unsigned long) pid);
 369                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 370                 }
 371
 372                 if (!(reply = dbus_message_new_method_return(message)))
 373                         goto oom;
 374
 375                 if (!(path = unit_dbus_path(u)))
 376                         goto oom;
 377
 378                 if (!dbus_message_append_args(
 379                                     reply,
 380                                     DBUS_TYPE_OBJECT_PATH, &path,
 381                                     DBUS_TYPE_INVALID))
 382                         goto oom;
 383         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 384                 const char *name;
 385                 Unit *u;
 386
 387                 if (!dbus_message_get_args(
 388                                     message,
 389                                     &error,
 390                                     DBUS_TYPE_STRING, &name,
 391                                     DBUS_TYPE_INVALID))
 392                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 393
 394                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 395                         return bus_send_error_reply(m, connection, message, &error, r);
 396
 397                 if (!(reply = dbus_message_new_method_return(message)))
 398                         goto oom;
 399
 400                 if (!(path = unit_dbus_path(u)))
 401                         goto oom;
 402
 403                 if (!dbus_message_append_args(
 404                                     reply,
 405                                     DBUS_TYPE_OBJECT_PATH, &path,
 406                                     DBUS_TYPE_INVALID))
 407                         goto oom;
 408
 409         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 410                 job_type = JOB_START;
 411         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 412                 job_type = JOB_STOP;
 413         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 414                 job_type = JOB_RELOAD;
 415         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 416                 job_type = JOB_RESTART;
 417         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 418                 job_type = JOB_TRY_RESTART;
 419         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
 420                 reload_if_possible = true;
 421                 job_type = JOB_RESTART;
 422         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
 423                 reload_if_possible = true;
 424                 job_type = JOB_TRY_RESTART;
 425         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 426                 uint32_t id;
 427                 Job *j;
 428
 429                 if (!dbus_message_get_args(
 430                                     message,
 431                                     &error,
 432                                     DBUS_TYPE_UINT32, &id,
 433                                     DBUS_TYPE_INVALID))
 434                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 435
 436                 if (!(j = manager_get_job(m, id))) {
 437                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 438                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 439                 }
 440
 441                 if (!(reply = dbus_message_new_method_return(message)))
 442                         goto oom;
 443
 444                 if (!(path = job_dbus_path(j)))
 445                         goto oom;
 446
 447                 if (!dbus_message_append_args(
 448                                     reply,
 449                                     DBUS_TYPE_OBJECT_PATH, &path,
 450                                     DBUS_TYPE_INVALID))
 451                         goto oom;
 452
 453         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 454
 455                 manager_clear_jobs(m);
 456
 457                 if (!(reply = dbus_message_new_method_return(message)))
 458                         goto oom;
 459
 460         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailed")) {
 461
 462                 manager_reset_failed(m);
 463
 464                 if (!(reply = dbus_message_new_method_return(message)))
 465                         goto oom;
 466
 467         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailedUnit")) {
 468                 const char *name;
 469                 Unit *u;
 470
 471                 if (!dbus_message_get_args(
 472                                     message,
 473                                     &error,
 474                                     DBUS_TYPE_STRING, &name,
 475                                     DBUS_TYPE_INVALID))
 476                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 477
 478                 if (!(u = manager_get_unit(m, name))) {
 479                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 480                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 481                 }
 482
 483                 unit_reset_failed(u);
 484
 485                 if (!(reply = dbus_message_new_method_return(message)))
 486                         goto oom;
 487
 488         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 489                 DBusMessageIter iter, sub;
 490                 Iterator i;
 491                 Unit *u;
 492                 const char *k;
 493
 494                 if (!(reply = dbus_message_new_method_return(message)))
 495                         goto oom;
 496
 497                 dbus_message_iter_init_append(reply, &iter);
 498
 499                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssssouso)", &sub))
 500                         goto oom;
 501
 502                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 503                         char *u_path, *j_path;
 504                         const char *description, *load_state, *active_state, *sub_state, *sjob_type, *following;
 505                         DBusMessageIter sub2;
 506                         uint32_t job_id;
 507                         Unit *f;
 508
 509                         if (k != u->meta.id)
 510                                 continue;
 511
 512                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 513                                 goto oom;
 514
 515                         description = unit_description(u);
 516                         load_state = unit_load_state_to_string(u->meta.load_state);
 517                         active_state = unit_active_state_to_string(unit_active_state(u));
 518                         sub_state = unit_sub_state_to_string(u);
 519
 520                         f = unit_following(u);
 521                         following = f ? f->meta.id : "";
 522
 523                         if (!(u_path = unit_dbus_path(u)))
 524                                 goto oom;
 525
 526                         if (u->meta.job) {
 527                                 job_id = (uint32_t) u->meta.job->id;
 528
 529                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 530                                         free(u_path);
 531                                         goto oom;
 532                                 }
 533
 534                                 sjob_type = job_type_to_string(u->meta.job->type);
 535                         } else {
 536                                 job_id = 0;
 537                                 j_path = u_path;
 538                                 sjob_type = "";
 539                         }
 540
 541                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 542                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 543                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 544                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 545                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 546                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &following) ||
 547                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 548                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 549                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 550                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 551                                 free(u_path);
 552                                 if (u->meta.job)
 553                                         free(j_path);
 554                                 goto oom;
 555                         }
 556
 557                         free(u_path);
 558                         if (u->meta.job)
 559                                 free(j_path);
 560
 561                         if (!dbus_message_iter_close_container(&sub, &sub2))
 562                                 goto oom;
 563                 }
 564
 565                 if (!dbus_message_iter_close_container(&iter, &sub))
 566                         goto oom;
 567
 568         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 569                 DBusMessageIter iter, sub;
 570                 Iterator i;
 571                 Job *j;
 572
 573                 if (!(reply = dbus_message_new_method_return(message)))
 574                         goto oom;
 575
 576                 dbus_message_iter_init_append(reply, &iter);
 577
 578                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 579                         goto oom;
 580
 581                 HASHMAP_FOREACH(j, m->jobs, i) {
 582                         char *u_path, *j_path;
 583                         const char *state, *type;
 584                         uint32_t id;
 585                         DBusMessageIter sub2;
 586
 587                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 588                                 goto oom;
 589
 590                         id = (uint32_t) j->id;
 591                         state = job_state_to_string(j->state);
 592                         type = job_type_to_string(j->type);
 593
 594                         if (!(j_path = job_dbus_path(j)))
 595                                 goto oom;
 596
 597                         if (!(u_path = unit_dbus_path(j->unit))) {
 598                                 free(j_path);
 599                                 goto oom;
 600                         }
 601
 602                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 603                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 604                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 605                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 606                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 607                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 608                                 free(j_path);
 609                                 free(u_path);
 610                                 goto oom;
 611                         }
 612
 613                         free(j_path);
 614                         free(u_path);
 615
 616                         if (!dbus_message_iter_close_container(&sub, &sub2))
 617                                 goto oom;
 618                 }
 619
 620                 if (!dbus_message_iter_close_container(&iter, &sub))
 621                         goto oom;
 622
 623         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 624                 char *client;
 625                 Set *s;
 626
 627                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 628                         if (!(s = set_new(string_hash_func, string_compare_func)))
 629                                 goto oom;
 630
 631                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 632                                 set_free(s);
 633                                 goto oom;
 634                         }
 635                 }
 636
 637                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 638                         goto oom;
 639
 640                 if ((r = set_put(s, client)) < 0) {
 641                         free(client);
 642                         return bus_send_error_reply(m, connection, message, NULL, r);
 643                 }
 644
 645                 if (!(reply = dbus_message_new_method_return(message)))
 646                         goto oom;
 647
 648         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 649                 char *client;
 650
 651                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 652                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 653                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 654                 }
 655
 656                 free(client);
 657
 658                 if (!(reply = dbus_message_new_method_return(message)))
 659                         goto oom;
 660
 661         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 662                 FILE *f;
 663                 char *dump = NULL;
 664                 size_t size;
 665
 666                 if (!(reply = dbus_message_new_method_return(message)))
 667                         goto oom;
 668
 669                 if (!(f = open_memstream(&dump, &size)))
 670                         goto oom;
 671
 672                 manager_dump_units(m, f, NULL);
 673                 manager_dump_jobs(m, f, NULL);
 674
 675                 if (ferror(f)) {
 676                         fclose(f);
 677                         free(dump);
 678                         goto oom;
 679                 }
 680
 681                 fclose(f);
 682
 683                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 684                         free(dump);
 685                         goto oom;
 686                 }
 687
 688                 free(dump);
 689         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 690                 const char *name;
 691                 dbus_bool_t cleanup;
 692                 Snapshot *s;
 693
 694                 if (!dbus_message_get_args(
 695                                     message,
 696                                     &error,
 697                                     DBUS_TYPE_STRING, &name,
 698                                     DBUS_TYPE_BOOLEAN, &cleanup,
 699                                     DBUS_TYPE_INVALID))
 700                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 701
 702                 if (name && name[0] == 0)
 703                         name = NULL;
 704
 705                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 706                         return bus_send_error_reply(m, connection, message, &error, r);
 707
 708                 if (!(reply = dbus_message_new_method_return(message)))
 709                         goto oom;
 710
 711                 if (!(path = unit_dbus_path(UNIT(s))))
 712                         goto oom;
 713
 714                 if (!dbus_message_append_args(
 715                                     reply,
 716                                     DBUS_TYPE_OBJECT_PATH, &path,
 717                                     DBUS_TYPE_INVALID))
 718                         goto oom;
 719
 720         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 721                 char *introspection = NULL;
 722                 FILE *f;
 723                 Iterator i;
 724                 Unit *u;
 725                 Job *j;
 726                 const char *k;
 727                 size_t size;
 728
 729                 if (!(reply = dbus_message_new_method_return(message)))
 730                         goto oom;
 731
 732                 /* We roll our own introspection code here, instead of
 733                  * relying on bus_default_message_handler() because we
 734                  * need to generate our introspection string
 735                  * dynamically. */
 736
 737                 if (!(f = open_memstream(&introspection, &size)))
 738                         goto oom;
 739
 740                 fputs(INTROSPECTION_BEGIN, f);
 741
 742                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 743                         char *p;
 744
 745                         if (k != u->meta.id)
 746                                 continue;
 747
 748                         if (!(p = bus_path_escape(k))) {
 749                                 fclose(f);
 750                                 free(introspection);
 751                                 goto oom;
 752                         }
 753
 754                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 755                         free(p);
 756                 }
 757
 758                 HASHMAP_FOREACH(j, m->jobs, i)
 759                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 760
 761                 fputs(INTROSPECTION_END, f);
 762
 763                 if (ferror(f)) {
 764                         fclose(f);
 765                         free(introspection);
 766                         goto oom;
 767                 }
 768
 769                 fclose(f);
 770
 771                 if (!introspection)
 772                         goto oom;
 773
 774                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 775                         free(introspection);
 776                         goto oom;
 777                 }
 778
 779                 free(introspection);
 780
 781         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 782
 783                 assert(!m->queued_message);
 784
 785                 /* Instead of sending the reply back right away, we
 786                  * just remember that we need to and then send it
 787                  * after the reload is finished. That way the caller
 788                  * knows when the reload finished. */
 789
 790                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 791                         goto oom;
 792
 793                 m->queued_message_connection = connection;
 794                 m->exit_code = MANAGER_RELOAD;
 795
 796         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 797
 798                 if (!(reply = dbus_message_new_method_return(message)))
 799                         goto oom;
 800
 801                 m->exit_code = MANAGER_REEXECUTE;
 802
 803         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 804
 805                 if (m->running_as == MANAGER_SYSTEM) {
 806                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
 807                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 808                 }
 809
 810                 if (!(reply = dbus_message_new_method_return(message)))
 811                         goto oom;
 812
 813                 m->exit_code = MANAGER_EXIT;
 814
 815         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reboot")) {
 816
 817                 if (m->running_as != MANAGER_SYSTEM) {
 818                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Reboot is only supported for system managers.");
 819                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 820                 }
 821
 822                 if (!(reply = dbus_message_new_method_return(message)))
 823                         goto oom;
 824
 825                 m->exit_code = MANAGER_REBOOT;
 826
 827         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "PowerOff")) {
 828
 829                 if (m->running_as != MANAGER_SYSTEM) {
 830                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Powering off is only supported for system managers.");
 831                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 832                 }
 833
 834                 if (!(reply = dbus_message_new_method_return(message)))
 835                         goto oom;
 836
 837                 m->exit_code = MANAGER_POWEROFF;
 838
 839         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Halt")) {
 840
 841                 if (m->running_as != MANAGER_SYSTEM) {
 842                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Halting is only supported for system managers.");
 843                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 844                 }
 845
 846                 if (!(reply = dbus_message_new_method_return(message)))
 847                         goto oom;
 848
 849                 m->exit_code = MANAGER_HALT;
 850
 851         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "KExec")) {
 852
 853                 if (m->running_as != MANAGER_SYSTEM) {
 854                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "kexec is only supported for system managers.");
 855                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 856                 }
 857
 858                 if (!(reply = dbus_message_new_method_return(message)))
 859                         goto oom;
 860
 861                 m->exit_code = MANAGER_KEXEC;
 862
 863         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 864                 char **l = NULL, **e = NULL;
 865
 866                 if ((r = bus_parse_strv(message, &l)) < 0) {
 867                         if (r == -ENOMEM)
 868                                 goto oom;
 869
 870                         return bus_send_error_reply(m, connection, message, NULL, r);
 871                 }
 872
 873                 e = strv_env_merge(2, m->environment, l);
 874                 strv_free(l);
 875
 876                 if (!e)
 877                         goto oom;
 878
 879                 if (!(reply = dbus_message_new_method_return(message))) {
 880                         strv_free(e);
 881                         goto oom;
 882                 }
 883
 884                 strv_free(m->environment);
 885                 m->environment = e;
 886
 887         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 888                 char **l = NULL, **e = NULL;
 889
 890                 if ((r = bus_parse_strv(message, &l)) < 0) {
 891                         if (r == -ENOMEM)
 892                                 goto oom;
 893
 894                         return bus_send_error_reply(m, connection, message, NULL, r);
 895                 }
 896
 897                 e = strv_env_delete(m->environment, 1, l);
 898                 strv_free(l);
 899
 900                 if (!e)
 901                         goto oom;
 902
 903                 if (!(reply = dbus_message_new_method_return(message)))
 904                         goto oom;
 905
 906                 strv_free(m->environment);
 907                 m->environment = e;
 908
 909         } else
 910                 return bus_default_message_handler(m, connection, message, NULL, properties);
 911
 912         if (job_type != _JOB_TYPE_INVALID) {
 913                 const char *name, *smode;
 914                 JobMode mode;
 915                 Job *j;
 916                 Unit *u;
 917
 918                 if (!dbus_message_get_args(
 919                                     message,
 920                                     &error,
 921                                     DBUS_TYPE_STRING, &name,
 922                                     DBUS_TYPE_STRING, &smode,
 923                                     DBUS_TYPE_INVALID))
 924                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 925
 926                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
 927                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
 928                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 929                 }
 930
 931                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 932                         return bus_send_error_reply(m, connection, message, &error, r);
 933
 934                 if (reload_if_possible && unit_can_reload(u)) {
 935                         if (job_type == JOB_RESTART)
 936                                 job_type = JOB_RELOAD_OR_START;
 937                         else if (job_type == JOB_TRY_RESTART)
 938                                 job_type = JOB_RELOAD;
 939                 }
 940
 941                 if ((job_type == JOB_START && u->meta.refuse_manual_start) ||
 942                     (job_type == JOB_STOP && u->meta.refuse_manual_stop) ||
 943                     ((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&
 944                      (u->meta.refuse_manual_start || u->meta.refuse_manual_stop))) {
 945                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested by dependency only.");
 946                         return bus_send_error_reply(m, connection, message, &error, -EPERM);
 947                 }
 948
 949                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
 950                         return bus_send_error_reply(m, connection, message, &error, r);
 951
 952                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
 953                         goto oom;
 954
 955                 j->bus = connection;
 956
 957                 if (!(reply = dbus_message_new_method_return(message)))
 958                         goto oom;
 959
 960                 if (!(path = job_dbus_path(j)))
 961                         goto oom;
 962
 963                 if (!dbus_message_append_args(
 964                                     reply,
 965                                     DBUS_TYPE_OBJECT_PATH, &path,
 966                                     DBUS_TYPE_INVALID))
 967                         goto oom;
 968         }
 969
 970         free(path);
 971
 972         if (reply) {
 973                 if (!dbus_connection_send(connection, reply, NULL))
 974                         goto oom;
 975
 976                 dbus_message_unref(reply);
 977         }
 978
 979         return DBUS_HANDLER_RESULT_HANDLED;
 980
 981 oom:
 982         free(path);
 983
 984         if (reply)
 985                 dbus_message_unref(reply);
 986
 987         dbus_error_free(&error);
 988
 989         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 990 }
 991
 992 const DBusObjectPathVTable bus_manager_vtable = {
 993         .message_function = bus_manager_message_handler
 994 };