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