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=\"ResetMaintenanceUnit\">\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=\"ResetMaintenance\"/>\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=\"MountOnPlug\" type=\"b\" access=\"read\"/>\n" \
 145         "  <property name=\"SwapOnPlug\" type=\"b\" access=\"read\"/>\n" \
 146         "  <property name=\"MountAuto\" type=\"b\" access=\"read\"/>\n" \
 147         " </interface>\n"
 148
 149 #define INTROSPECTION_BEGIN                                             \
 150         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 151         "<node>\n"                                                      \
 152         BUS_MANAGER_INTERFACE                                           \
 153         BUS_PROPERTIES_INTERFACE                                        \
 154         BUS_PEER_INTERFACE                                              \
 155         BUS_INTROSPECTABLE_INTERFACE
 156
 157 #define INTROSPECTION_END                                               \
 158         "</node>\n"
 159
 160 const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
 161
 162 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 163
 164 static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 165         const char *t;
 166
 167         assert(m);
 168         assert(i);
 169         assert(property);
 170
 171         t = log_target_to_string(log_get_target());
 172
 173         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 174                 return -ENOMEM;
 175
 176         return 0;
 177 }
 178
 179 static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 180         const char *t;
 181
 182         assert(m);
 183         assert(i);
 184         assert(property);
 185
 186         t = log_level_to_string(log_get_max_level());
 187
 188         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 189                 return -ENOMEM;
 190
 191         return 0;
 192 }
 193
 194 static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 195         uint32_t u;
 196
 197         assert(m);
 198         assert(i);
 199         assert(property);
 200
 201         u = hashmap_size(m->units);
 202
 203         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 204                 return -ENOMEM;
 205
 206         return 0;
 207 }
 208
 209 static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 210         uint32_t u;
 211
 212         assert(m);
 213         assert(i);
 214         assert(property);
 215
 216         u = hashmap_size(m->jobs);
 217
 218         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 219                 return -ENOMEM;
 220
 221         return 0;
 222 }
 223
 224 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 225         const char *s;
 226
 227         assert(m);
 228
 229         if ((s = dbus_message_get_sender(m)))
 230                 return s;
 231
 232         /* When the message came in from a direct connection the
 233          * message will have no sender. We fix that here. */
 234
 235         return ":no-sender";
 236 }
 237
 238 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 239         Manager *m = data;
 240
 241         const BusProperty properties[] = {
 242                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 243                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 244                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 245                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 246                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 247                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 248                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 249                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 250                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 251                 { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
 252                 { "org.freedesktop.systemd1.Manager", "SysVConsole",   bus_property_append_bool,      "b",  &m->sysv_console   },
 253                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 254                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 255                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 256                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 257                 { "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
 258                 { "org.freedesktop.systemd1.Manager", "MountOnPlug",   bus_property_append_bool,      "b",  &m->mount_on_plug  },
 259                 { "org.freedesktop.systemd1.Manager", "SwapOnPlug",    bus_property_append_bool,      "b",  &m->swap_on_plug   },
 260                 { "org.freedesktop.systemd1.Manager", "MountAuto",     bus_property_append_bool,      "b",  &m->mount_auto     },
 261                 { NULL, NULL, NULL, NULL, NULL }
 262         };
 263
 264         int r;
 265         DBusError error;
 266         DBusMessage *reply = NULL;
 267         char * path = NULL;
 268         JobType job_type = _JOB_TYPE_INVALID;
 269         bool reload_if_possible = false;
 270
 271         assert(connection);
 272         assert(message);
 273         assert(m);
 274
 275         dbus_error_init(&error);
 276
 277         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 278                 const char *name;
 279                 Unit *u;
 280
 281                 if (!dbus_message_get_args(
 282                                     message,
 283                                     &error,
 284                                     DBUS_TYPE_STRING, &name,
 285                                     DBUS_TYPE_INVALID))
 286                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 287
 288                 if (!(u = manager_get_unit(m, name))) {
 289                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 290                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 291                 }
 292
 293                 if (!(reply = dbus_message_new_method_return(message)))
 294                         goto oom;
 295
 296                 if (!(path = unit_dbus_path(u)))
 297                         goto oom;
 298
 299                 if (!dbus_message_append_args(
 300                                     reply,
 301                                     DBUS_TYPE_OBJECT_PATH, &path,
 302                                     DBUS_TYPE_INVALID))
 303                         goto oom;
 304         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnitByPID")) {
 305                 Unit *u;
 306                 uint32_t pid;
 307
 308                 if (!dbus_message_get_args(
 309                                     message,
 310                                     &error,
 311                                     DBUS_TYPE_UINT32, &pid,
 312                                     DBUS_TYPE_INVALID))
 313                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 314
 315                 if (!(u = cgroup_unit_by_pid(m, (pid_t) pid))) {
 316                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "No unit for PID %lu is loaded.", (unsigned long) pid);
 317                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 318                 }
 319
 320                 if (!(reply = dbus_message_new_method_return(message)))
 321                         goto oom;
 322
 323                 if (!(path = unit_dbus_path(u)))
 324                         goto oom;
 325
 326                 if (!dbus_message_append_args(
 327                                     reply,
 328                                     DBUS_TYPE_OBJECT_PATH, &path,
 329                                     DBUS_TYPE_INVALID))
 330                         goto oom;
 331         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 332                 const char *name;
 333                 Unit *u;
 334
 335                 if (!dbus_message_get_args(
 336                                     message,
 337                                     &error,
 338                                     DBUS_TYPE_STRING, &name,
 339                                     DBUS_TYPE_INVALID))
 340                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 341
 342                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 343                         return bus_send_error_reply(m, connection, message, &error, r);
 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
 357         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 358                 job_type = JOB_START;
 359         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 360                 job_type = JOB_STOP;
 361         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 362                 job_type = JOB_RELOAD;
 363         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 364                 job_type = JOB_RESTART;
 365         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 366                 job_type = JOB_TRY_RESTART;
 367         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
 368                 reload_if_possible = true;
 369                 job_type = JOB_RESTART;
 370         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
 371                 reload_if_possible = true;
 372                 job_type = JOB_TRY_RESTART;
 373         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 374                 uint32_t id;
 375                 Job *j;
 376
 377                 if (!dbus_message_get_args(
 378                                     message,
 379                                     &error,
 380                                     DBUS_TYPE_UINT32, &id,
 381                                     DBUS_TYPE_INVALID))
 382                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 383
 384                 if (!(j = manager_get_job(m, id))) {
 385                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 386                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 387                 }
 388
 389                 if (!(reply = dbus_message_new_method_return(message)))
 390                         goto oom;
 391
 392                 if (!(path = job_dbus_path(j)))
 393                         goto oom;
 394
 395                 if (!dbus_message_append_args(
 396                                     reply,
 397                                     DBUS_TYPE_OBJECT_PATH, &path,
 398                                     DBUS_TYPE_INVALID))
 399                         goto oom;
 400
 401         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 402
 403                 manager_clear_jobs(m);
 404
 405                 if (!(reply = dbus_message_new_method_return(message)))
 406                         goto oom;
 407
 408         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenance")) {
 409
 410                 manager_reset_maintenance(m);
 411
 412                 if (!(reply = dbus_message_new_method_return(message)))
 413                         goto oom;
 414
 415         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetMaintenanceUnit")) {
 416                 const char *name;
 417                 Unit *u;
 418
 419                 if (!dbus_message_get_args(
 420                                     message,
 421                                     &error,
 422                                     DBUS_TYPE_STRING, &name,
 423                                     DBUS_TYPE_INVALID))
 424                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 425
 426                 if (!(u = manager_get_unit(m, name))) {
 427                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 428                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 429                 }
 430
 431                 unit_reset_maintenance(u);
 432
 433                 if (!(reply = dbus_message_new_method_return(message)))
 434                         goto oom;
 435
 436         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 437                 DBusMessageIter iter, sub;
 438                 Iterator i;
 439                 Unit *u;
 440                 const char *k;
 441
 442                 if (!(reply = dbus_message_new_method_return(message)))
 443                         goto oom;
 444
 445                 dbus_message_iter_init_append(reply, &iter);
 446
 447                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssssouso)", &sub))
 448                         goto oom;
 449
 450                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 451                         char *u_path, *j_path;
 452                         const char *description, *load_state, *active_state, *sub_state, *sjob_type, *following;
 453                         DBusMessageIter sub2;
 454                         uint32_t job_id;
 455                         Unit *f;
 456
 457                         if (k != u->meta.id)
 458                                 continue;
 459
 460                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 461                                 goto oom;
 462
 463                         description = unit_description(u);
 464                         load_state = unit_load_state_to_string(u->meta.load_state);
 465                         active_state = unit_active_state_to_string(unit_active_state(u));
 466                         sub_state = unit_sub_state_to_string(u);
 467
 468                         f = unit_following(u);
 469                         following = f ? f->meta.id : "";
 470
 471                         if (!(u_path = unit_dbus_path(u)))
 472                                 goto oom;
 473
 474                         if (u->meta.job) {
 475                                 job_id = (uint32_t) u->meta.job->id;
 476
 477                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 478                                         free(u_path);
 479                                         goto oom;
 480                                 }
 481
 482                                 sjob_type = job_type_to_string(u->meta.job->type);
 483                         } else {
 484                                 job_id = 0;
 485                                 j_path = u_path;
 486                                 sjob_type = "";
 487                         }
 488
 489                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 490                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 491                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 492                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 493                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 494                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &following) ||
 495                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 496                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 497                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 498                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 499                                 free(u_path);
 500                                 if (u->meta.job)
 501                                         free(j_path);
 502                                 goto oom;
 503                         }
 504
 505                         free(u_path);
 506                         if (u->meta.job)
 507                                 free(j_path);
 508
 509                         if (!dbus_message_iter_close_container(&sub, &sub2))
 510                                 goto oom;
 511                 }
 512
 513                 if (!dbus_message_iter_close_container(&iter, &sub))
 514                         goto oom;
 515
 516         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 517                 DBusMessageIter iter, sub;
 518                 Iterator i;
 519                 Job *j;
 520
 521                 if (!(reply = dbus_message_new_method_return(message)))
 522                         goto oom;
 523
 524                 dbus_message_iter_init_append(reply, &iter);
 525
 526                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 527                         goto oom;
 528
 529                 HASHMAP_FOREACH(j, m->jobs, i) {
 530                         char *u_path, *j_path;
 531                         const char *state, *type;
 532                         uint32_t id;
 533                         DBusMessageIter sub2;
 534
 535                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 536                                 goto oom;
 537
 538                         id = (uint32_t) j->id;
 539                         state = job_state_to_string(j->state);
 540                         type = job_type_to_string(j->type);
 541
 542                         if (!(j_path = job_dbus_path(j)))
 543                                 goto oom;
 544
 545                         if (!(u_path = unit_dbus_path(j->unit))) {
 546                                 free(j_path);
 547                                 goto oom;
 548                         }
 549
 550                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 551                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 552                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 553                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 554                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 555                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 556                                 free(j_path);
 557                                 free(u_path);
 558                                 goto oom;
 559                         }
 560
 561                         free(j_path);
 562                         free(u_path);
 563
 564                         if (!dbus_message_iter_close_container(&sub, &sub2))
 565                                 goto oom;
 566                 }
 567
 568                 if (!dbus_message_iter_close_container(&iter, &sub))
 569                         goto oom;
 570
 571         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 572                 char *client;
 573                 Set *s;
 574
 575                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 576                         if (!(s = set_new(string_hash_func, string_compare_func)))
 577                                 goto oom;
 578
 579                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 580                                 set_free(s);
 581                                 goto oom;
 582                         }
 583                 }
 584
 585                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 586                         goto oom;
 587
 588                 if ((r = set_put(s, client)) < 0) {
 589                         free(client);
 590                         return bus_send_error_reply(m, connection, message, NULL, r);
 591                 }
 592
 593                 if (!(reply = dbus_message_new_method_return(message)))
 594                         goto oom;
 595
 596         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 597                 char *client;
 598
 599                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 600                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 601                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 602                 }
 603
 604                 free(client);
 605
 606                 if (!(reply = dbus_message_new_method_return(message)))
 607                         goto oom;
 608
 609         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 610                 FILE *f;
 611                 char *dump = NULL;
 612                 size_t size;
 613
 614                 if (!(reply = dbus_message_new_method_return(message)))
 615                         goto oom;
 616
 617                 if (!(f = open_memstream(&dump, &size)))
 618                         goto oom;
 619
 620                 manager_dump_units(m, f, NULL);
 621                 manager_dump_jobs(m, f, NULL);
 622
 623                 if (ferror(f)) {
 624                         fclose(f);
 625                         free(dump);
 626                         goto oom;
 627                 }
 628
 629                 fclose(f);
 630
 631                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 632                         free(dump);
 633                         goto oom;
 634                 }
 635
 636                 free(dump);
 637         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 638                 const char *name;
 639                 dbus_bool_t cleanup;
 640                 Snapshot *s;
 641
 642                 if (!dbus_message_get_args(
 643                                     message,
 644                                     &error,
 645                                     DBUS_TYPE_STRING, &name,
 646                                     DBUS_TYPE_BOOLEAN, &cleanup,
 647                                     DBUS_TYPE_INVALID))
 648                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 649
 650                 if (name && name[0] == 0)
 651                         name = NULL;
 652
 653                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 654                         return bus_send_error_reply(m, connection, message, &error, r);
 655
 656                 if (!(reply = dbus_message_new_method_return(message)))
 657                         goto oom;
 658
 659                 if (!(path = unit_dbus_path(UNIT(s))))
 660                         goto oom;
 661
 662                 if (!dbus_message_append_args(
 663                                     reply,
 664                                     DBUS_TYPE_OBJECT_PATH, &path,
 665                                     DBUS_TYPE_INVALID))
 666                         goto oom;
 667
 668         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 669                 char *introspection = NULL;
 670                 FILE *f;
 671                 Iterator i;
 672                 Unit *u;
 673                 Job *j;
 674                 const char *k;
 675                 size_t size;
 676
 677                 if (!(reply = dbus_message_new_method_return(message)))
 678                         goto oom;
 679
 680                 /* We roll our own introspection code here, instead of
 681                  * relying on bus_default_message_handler() because we
 682                  * need to generate our introspection string
 683                  * dynamically. */
 684
 685                 if (!(f = open_memstream(&introspection, &size)))
 686                         goto oom;
 687
 688                 fputs(INTROSPECTION_BEGIN, f);
 689
 690                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 691                         char *p;
 692
 693                         if (k != u->meta.id)
 694                                 continue;
 695
 696                         if (!(p = bus_path_escape(k))) {
 697                                 fclose(f);
 698                                 free(introspection);
 699                                 goto oom;
 700                         }
 701
 702                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 703                         free(p);
 704                 }
 705
 706                 HASHMAP_FOREACH(j, m->jobs, i)
 707                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 708
 709                 fputs(INTROSPECTION_END, f);
 710
 711                 if (ferror(f)) {
 712                         fclose(f);
 713                         free(introspection);
 714                         goto oom;
 715                 }
 716
 717                 fclose(f);
 718
 719                 if (!introspection)
 720                         goto oom;
 721
 722                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 723                         free(introspection);
 724                         goto oom;
 725                 }
 726
 727                 free(introspection);
 728
 729         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 730
 731                 assert(!m->queued_message);
 732
 733                 /* Instead of sending the reply back right away, we
 734                  * just remember that we need to and then send it
 735                  * after the reload is finished. That way the caller
 736                  * knows when the reload finished. */
 737
 738                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 739                         goto oom;
 740
 741                 m->queued_message_connection = connection;
 742                 m->exit_code = MANAGER_RELOAD;
 743
 744         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 745
 746                 if (!(reply = dbus_message_new_method_return(message)))
 747                         goto oom;
 748
 749                 m->exit_code = MANAGER_REEXECUTE;
 750
 751         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 752
 753                 if (m->running_as == MANAGER_SYSTEM) {
 754                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
 755                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 756                 }
 757
 758                 if (!(reply = dbus_message_new_method_return(message)))
 759                         goto oom;
 760
 761                 m->exit_code = MANAGER_EXIT;
 762
 763         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 764                 char **l = NULL, **e = NULL;
 765
 766                 if ((r = bus_parse_strv(message, &l)) < 0) {
 767                         if (r == -ENOMEM)
 768                                 goto oom;
 769
 770                         return bus_send_error_reply(m, connection, message, NULL, r);
 771                 }
 772
 773                 e = strv_env_merge(2, m->environment, l);
 774                 strv_free(l);
 775
 776                 if (!e)
 777                         goto oom;
 778
 779                 if (!(reply = dbus_message_new_method_return(message))) {
 780                         strv_free(e);
 781                         goto oom;
 782                 }
 783
 784                 strv_free(m->environment);
 785                 m->environment = e;
 786
 787         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 788                 char **l = NULL, **e = NULL;
 789
 790                 if ((r = bus_parse_strv(message, &l)) < 0) {
 791                         if (r == -ENOMEM)
 792                                 goto oom;
 793
 794                         return bus_send_error_reply(m, connection, message, NULL, r);
 795                 }
 796
 797                 e = strv_env_delete(m->environment, 1, l);
 798                 strv_free(l);
 799
 800                 if (!e)
 801                         goto oom;
 802
 803                 if (!(reply = dbus_message_new_method_return(message)))
 804                         goto oom;
 805
 806                 strv_free(m->environment);
 807                 m->environment = e;
 808
 809         } else
 810                 return bus_default_message_handler(m, connection, message, NULL, properties);
 811
 812         if (job_type != _JOB_TYPE_INVALID) {
 813                 const char *name, *smode;
 814                 JobMode mode;
 815                 Job *j;
 816                 Unit *u;
 817
 818                 if (!dbus_message_get_args(
 819                                     message,
 820                                     &error,
 821                                     DBUS_TYPE_STRING, &name,
 822                                     DBUS_TYPE_STRING, &smode,
 823                                     DBUS_TYPE_INVALID))
 824                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 825
 826                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
 827                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
 828                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 829                 }
 830
 831                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 832                         return bus_send_error_reply(m, connection, message, &error, r);
 833
 834                 if (reload_if_possible && unit_can_reload(u)) {
 835                         if (job_type == JOB_RESTART)
 836                                 job_type = JOB_RELOAD_OR_START;
 837                         else if (job_type == JOB_TRY_RESTART)
 838                                 job_type = JOB_RELOAD;
 839                 }
 840
 841                 if ((job_type == JOB_START && u->meta.refuse_manual_start) ||
 842                     (job_type == JOB_STOP && u->meta.refuse_manual_stop) ||
 843                     ((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&
 844                      (u->meta.refuse_manual_start || u->meta.refuse_manual_stop))) {
 845                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested by dependency only.");
 846                         return bus_send_error_reply(m, connection, message, &error, -EPERM);
 847                 }
 848
 849                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
 850                         return bus_send_error_reply(m, connection, message, &error, r);
 851
 852                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
 853                         goto oom;
 854
 855                 j->bus = connection;
 856
 857                 if (!(reply = dbus_message_new_method_return(message)))
 858                         goto oom;
 859
 860                 if (!(path = job_dbus_path(j)))
 861                         goto oom;
 862
 863                 if (!dbus_message_append_args(
 864                                     reply,
 865                                     DBUS_TYPE_OBJECT_PATH, &path,
 866                                     DBUS_TYPE_INVALID))
 867                         goto oom;
 868         }
 869
 870         free(path);
 871
 872         if (reply) {
 873                 if (!dbus_connection_send(connection, reply, NULL))
 874                         goto oom;
 875
 876                 dbus_message_unref(reply);
 877         }
 878
 879         return DBUS_HANDLER_RESULT_HANDLED;
 880
 881 oom:
 882         free(path);
 883
 884         if (reply)
 885                 dbus_message_unref(reply);
 886
 887         dbus_error_free(&error);
 888
 889         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 890 }
 891
 892 const DBusObjectPathVTable bus_manager_vtable = {
 893         .message_function = bus_manager_message_handler
 894 };