src/dbus-manager.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23
  24 #include "dbus.h"
  25 #include "log.h"
  26 #include "dbus-manager.h"
  27 #include "strv.h"
  28 #include "bus-errors.h"
  29
  30 #define BUS_MANAGER_INTERFACE                                           \
  31         " <interface name=\"org.freedesktop.systemd1.Manager\">\n"      \
  32         "  <method name=\"GetUnit\">\n"                                 \
  33         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  34         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  35         "  </method>\n"                                                 \
  36         "  <method name=\"GetUnitByPID\">\n"                            \
  37         "   <arg name=\"pid\" type=\"u\" direction=\"in\"/>\n"         \
  38         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  39         "  </method>\n"                                                 \
  40         "  <method name=\"LoadUnit\">\n"                                \
  41         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  42         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  43         "  </method>\n"                                                 \
  44         "  <method name=\"StartUnit\">\n"                               \
  45         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  46         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  47         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  48         "  </method>\n"                                                 \
  49         "  <method name=\"StopUnit\">\n"                                \
  50         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  51         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  52         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  53         "  </method>\n"                                                 \
  54         "  <method name=\"ReloadUnit\">\n"                              \
  55         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  56         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  57         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  58         "  </method>\n"                                                 \
  59         "  <method name=\"RestartUnit\">\n"                             \
  60         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  61         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  62         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  63         "  </method>\n"                                                 \
  64         "  <method name=\"TryRestartUnit\">\n"                          \
  65         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  66         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  67         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  68         "  </method>\n"                                                 \
  69         "  <method name=\"ReloadOrRestartUnit\">\n"                     \
  70         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  71         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  72         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  73         "  </method>\n"                                                 \
  74         "  <method name=\"ReloadOrTryRestartUnit\">\n"                  \
  75         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  76         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  77         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  78         "  </method>\n"                                                 \
  79         "  <method name=\"ResetFailedUnit\">\n"                         \
  80         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  81         "  </method>\n"                                                 \
  82         "  <method name=\"GetJob\">\n"                                  \
  83         "   <arg name=\"id\" type=\"u\" direction=\"in\"/>\n"           \
  84         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  85         "  </method>\n"                                                 \
  86         "  <method name=\"ClearJobs\"/>\n"                              \
  87         "  <method name=\"ResetFailed\"/>\n"                            \
  88         "  <method name=\"ListUnits\">\n"                               \
  89         "   <arg name=\"units\" type=\"a(ssssssouso)\" direction=\"out\"/>\n" \
  90         "  </method>\n"                                                 \
  91         "  <method name=\"ListJobs\">\n"                                \
  92         "   <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>\n" \
  93         "  </method>\n"                                                 \
  94         "  <method name=\"Subscribe\"/>\n"                              \
  95         "  <method name=\"Unsubscribe\"/>\n"                            \
  96         "  <method name=\"Dump\"/>\n"                                   \
  97         "  <method name=\"CreateSnapshot\">\n"                          \
  98         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  99         "   <arg name=\"cleanup\" type=\"b\" direction=\"in\"/>\n"      \
 100         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
 101         "  </method>\n"                                                 \
 102         "  <method name=\"Reload\"/>\n"                                 \
 103         "  <method name=\"Reexecute\"/>\n"                              \
 104         "  <method name=\"Exit\"/>\n"                                   \
 105         "  <method name=\"SetEnvironment\">\n"                          \
 106         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 107         "  </method>\n"                                                 \
 108         "  <method name=\"UnsetEnvironment\">\n"                        \
 109         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 110         "  </method>\n"                                                 \
 111         "  <signal name=\"UnitNew\">\n"                                 \
 112         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 113         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 114         "  </signal>\n"                                                 \
 115         "  <signal name=\"UnitRemoved\">\n"                             \
 116         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 117         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 118         "  </signal>\n"                                                 \
 119         "  <signal name=\"JobNew\">\n"                                  \
 120         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 121         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 122         "  </signal>\n"                                                 \
 123         "  <signal name=\"JobRemoved\">\n"                              \
 124         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 125         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 126         "   <arg name=\"success\" type=\"b\"/>\n"                       \
 127         "  </signal>"                                                   \
 128         "  <property name=\"Version\" type=\"s\" access=\"read\"/>\n"   \
 129         "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
 130         "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
 131         "  <property name=\"LogLevel\" type=\"s\" access=\"read\"/>\n"  \
 132         "  <property name=\"LogTarget\" type=\"s\" access=\"read\"/>\n" \
 133         "  <property name=\"NNames\" type=\"u\" access=\"read\"/>\n"    \
 134         "  <property name=\"NJobs\" type=\"u\" access=\"read\"/>\n"     \
 135         "  <property name=\"NInstalledJobs\" type=\"u\" access=\"read\"/>\n" \
 136         "  <property name=\"Progress\" type=\"d\" access=\"read\"/>\n"  \
 137         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
 138         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
 139         "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
 140         "  <property name=\"SysVConsole\" type=\"b\" access=\"read\"/>\n" \
 141         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
 142         "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
 143         "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n" \
 144         "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
 145         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 146         "  <property name=\"MountAuto\" type=\"b\" access=\"read\"/>\n" \
 147         "  <property name=\"SwapAuto\" type=\"b\" access=\"read\"/>\n"  \
 148         " </interface>\n"
 149
 150 #define INTROSPECTION_BEGIN                                             \
 151         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 152         "<node>\n"                                                      \
 153         BUS_MANAGER_INTERFACE                                           \
 154         BUS_PROPERTIES_INTERFACE                                        \
 155         BUS_PEER_INTERFACE                                              \
 156         BUS_INTROSPECTABLE_INTERFACE
 157
 158 #define INTROSPECTION_END                                               \
 159         "</node>\n"
 160
 161 const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
 162
 163 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 164
 165 static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 166         const char *t;
 167
 168         assert(m);
 169         assert(i);
 170         assert(property);
 171
 172         t = log_target_to_string(log_get_target());
 173
 174         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 175                 return -ENOMEM;
 176
 177         return 0;
 178 }
 179
 180 static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 181         const char *t;
 182
 183         assert(m);
 184         assert(i);
 185         assert(property);
 186
 187         t = log_level_to_string(log_get_max_level());
 188
 189         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 190                 return -ENOMEM;
 191
 192         return 0;
 193 }
 194
 195 static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 196         uint32_t u;
 197
 198         assert(m);
 199         assert(i);
 200         assert(property);
 201
 202         u = hashmap_size(m->units);
 203
 204         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 205                 return -ENOMEM;
 206
 207         return 0;
 208 }
 209
 210 static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 211         uint32_t u;
 212
 213         assert(m);
 214         assert(i);
 215         assert(property);
 216
 217         u = hashmap_size(m->jobs);
 218
 219         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 220                 return -ENOMEM;
 221
 222         return 0;
 223 }
 224
 225 static int bus_manager_append_progress(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 226         double d;
 227
 228         assert(m);
 229         assert(i);
 230         assert(property);
 231
 232         if (dual_timestamp_is_set(&m->finish_timestamp))
 233                 d = 1.0;
 234         else
 235                 d = 1.0 - ((double) hashmap_size(m->jobs) / (double) m->n_installed_jobs);
 236
 237         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_DOUBLE, &d))
 238                 return -ENOMEM;
 239
 240         return 0;
 241 }
 242
 243 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 244         const char *s;
 245
 246         assert(m);
 247
 248         if ((s = dbus_message_get_sender(m)))
 249                 return s;
 250
 251         /* When the message came in from a direct connection the
 252          * message will have no sender. We fix that here. */
 253
 254         return ":no-sender";
 255 }
 256
 257 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 258         Manager *m = data;
 259
 260         const BusProperty properties[] = {
 261                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 262                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 263                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 264                 { "org.freedesktop.systemd1.Manager", "FinishTimestamp", bus_property_append_uint64,  "t",  &m->finish_timestamp.realtime },
 265                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 266                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 267                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 268                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 269                 { "org.freedesktop.systemd1.Manager", "NInstalledJobs",bus_property_append_uint32,    "u",  &m->n_installed_jobs },
 270                 { "org.freedesktop.systemd1.Manager", "Progress",      bus_manager_append_progress,   "d",  NULL               },
 271                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 272                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 273                 { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
 274                 { "org.freedesktop.systemd1.Manager", "SysVConsole",   bus_property_append_bool,      "b",  &m->sysv_console   },
 275                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 276                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 277                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 278                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 279                 { "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
 280                 { "org.freedesktop.systemd1.Manager", "MountAuto",     bus_property_append_bool,      "b",  &m->mount_auto     },
 281                 { "org.freedesktop.systemd1.Manager", "SwapAuto",      bus_property_append_bool,      "b",  &m->swap_auto     },
 282                 { NULL, NULL, NULL, NULL, NULL }
 283         };
 284
 285         int r;
 286         DBusError error;
 287         DBusMessage *reply = NULL;
 288         char * path = NULL;
 289         JobType job_type = _JOB_TYPE_INVALID;
 290         bool reload_if_possible = false;
 291
 292         assert(connection);
 293         assert(message);
 294         assert(m);
 295
 296         dbus_error_init(&error);
 297
 298         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 299                 const char *name;
 300                 Unit *u;
 301
 302                 if (!dbus_message_get_args(
 303                                     message,
 304                                     &error,
 305                                     DBUS_TYPE_STRING, &name,
 306                                     DBUS_TYPE_INVALID))
 307                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 308
 309                 if (!(u = manager_get_unit(m, name))) {
 310                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 311                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 312                 }
 313
 314                 if (!(reply = dbus_message_new_method_return(message)))
 315                         goto oom;
 316
 317                 if (!(path = unit_dbus_path(u)))
 318                         goto oom;
 319
 320                 if (!dbus_message_append_args(
 321                                     reply,
 322                                     DBUS_TYPE_OBJECT_PATH, &path,
 323                                     DBUS_TYPE_INVALID))
 324                         goto oom;
 325         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnitByPID")) {
 326                 Unit *u;
 327                 uint32_t pid;
 328
 329                 if (!dbus_message_get_args(
 330                                     message,
 331                                     &error,
 332                                     DBUS_TYPE_UINT32, &pid,
 333                                     DBUS_TYPE_INVALID))
 334                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 335
 336                 if (!(u = cgroup_unit_by_pid(m, (pid_t) pid))) {
 337                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "No unit for PID %lu is loaded.", (unsigned long) pid);
 338                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 339                 }
 340
 341                 if (!(reply = dbus_message_new_method_return(message)))
 342                         goto oom;
 343
 344                 if (!(path = unit_dbus_path(u)))
 345                         goto oom;
 346
 347                 if (!dbus_message_append_args(
 348                                     reply,
 349                                     DBUS_TYPE_OBJECT_PATH, &path,
 350                                     DBUS_TYPE_INVALID))
 351                         goto oom;
 352         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 353                 const char *name;
 354                 Unit *u;
 355
 356                 if (!dbus_message_get_args(
 357                                     message,
 358                                     &error,
 359                                     DBUS_TYPE_STRING, &name,
 360                                     DBUS_TYPE_INVALID))
 361                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 362
 363                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 364                         return bus_send_error_reply(m, connection, message, &error, r);
 365
 366                 if (!(reply = dbus_message_new_method_return(message)))
 367                         goto oom;
 368
 369                 if (!(path = unit_dbus_path(u)))
 370                         goto oom;
 371
 372                 if (!dbus_message_append_args(
 373                                     reply,
 374                                     DBUS_TYPE_OBJECT_PATH, &path,
 375                                     DBUS_TYPE_INVALID))
 376                         goto oom;
 377
 378         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 379                 job_type = JOB_START;
 380         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 381                 job_type = JOB_STOP;
 382         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 383                 job_type = JOB_RELOAD;
 384         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 385                 job_type = JOB_RESTART;
 386         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 387                 job_type = JOB_TRY_RESTART;
 388         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
 389                 reload_if_possible = true;
 390                 job_type = JOB_RESTART;
 391         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
 392                 reload_if_possible = true;
 393                 job_type = JOB_TRY_RESTART;
 394         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 395                 uint32_t id;
 396                 Job *j;
 397
 398                 if (!dbus_message_get_args(
 399                                     message,
 400                                     &error,
 401                                     DBUS_TYPE_UINT32, &id,
 402                                     DBUS_TYPE_INVALID))
 403                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 404
 405                 if (!(j = manager_get_job(m, id))) {
 406                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 407                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 408                 }
 409
 410                 if (!(reply = dbus_message_new_method_return(message)))
 411                         goto oom;
 412
 413                 if (!(path = job_dbus_path(j)))
 414                         goto oom;
 415
 416                 if (!dbus_message_append_args(
 417                                     reply,
 418                                     DBUS_TYPE_OBJECT_PATH, &path,
 419                                     DBUS_TYPE_INVALID))
 420                         goto oom;
 421
 422         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 423
 424                 manager_clear_jobs(m);
 425
 426                 if (!(reply = dbus_message_new_method_return(message)))
 427                         goto oom;
 428
 429         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailed")) {
 430
 431                 manager_reset_failed(m);
 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", "ResetFailedUnit")) {
 437                 const char *name;
 438                 Unit *u;
 439
 440                 if (!dbus_message_get_args(
 441                                     message,
 442                                     &error,
 443                                     DBUS_TYPE_STRING, &name,
 444                                     DBUS_TYPE_INVALID))
 445                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 446
 447                 if (!(u = manager_get_unit(m, name))) {
 448                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 449                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 450                 }
 451
 452                 unit_reset_failed(u);
 453
 454                 if (!(reply = dbus_message_new_method_return(message)))
 455                         goto oom;
 456
 457         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 458                 DBusMessageIter iter, sub;
 459                 Iterator i;
 460                 Unit *u;
 461                 const char *k;
 462
 463                 if (!(reply = dbus_message_new_method_return(message)))
 464                         goto oom;
 465
 466                 dbus_message_iter_init_append(reply, &iter);
 467
 468                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssssouso)", &sub))
 469                         goto oom;
 470
 471                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 472                         char *u_path, *j_path;
 473                         const char *description, *load_state, *active_state, *sub_state, *sjob_type, *following;
 474                         DBusMessageIter sub2;
 475                         uint32_t job_id;
 476                         Unit *f;
 477
 478                         if (k != u->meta.id)
 479                                 continue;
 480
 481                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 482                                 goto oom;
 483
 484                         description = unit_description(u);
 485                         load_state = unit_load_state_to_string(u->meta.load_state);
 486                         active_state = unit_active_state_to_string(unit_active_state(u));
 487                         sub_state = unit_sub_state_to_string(u);
 488
 489                         f = unit_following(u);
 490                         following = f ? f->meta.id : "";
 491
 492                         if (!(u_path = unit_dbus_path(u)))
 493                                 goto oom;
 494
 495                         if (u->meta.job) {
 496                                 job_id = (uint32_t) u->meta.job->id;
 497
 498                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 499                                         free(u_path);
 500                                         goto oom;
 501                                 }
 502
 503                                 sjob_type = job_type_to_string(u->meta.job->type);
 504                         } else {
 505                                 job_id = 0;
 506                                 j_path = u_path;
 507                                 sjob_type = "";
 508                         }
 509
 510                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 511                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 512                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 513                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 514                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 515                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &following) ||
 516                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 517                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 518                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 519                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 520                                 free(u_path);
 521                                 if (u->meta.job)
 522                                         free(j_path);
 523                                 goto oom;
 524                         }
 525
 526                         free(u_path);
 527                         if (u->meta.job)
 528                                 free(j_path);
 529
 530                         if (!dbus_message_iter_close_container(&sub, &sub2))
 531                                 goto oom;
 532                 }
 533
 534                 if (!dbus_message_iter_close_container(&iter, &sub))
 535                         goto oom;
 536
 537         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 538                 DBusMessageIter iter, sub;
 539                 Iterator i;
 540                 Job *j;
 541
 542                 if (!(reply = dbus_message_new_method_return(message)))
 543                         goto oom;
 544
 545                 dbus_message_iter_init_append(reply, &iter);
 546
 547                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 548                         goto oom;
 549
 550                 HASHMAP_FOREACH(j, m->jobs, i) {
 551                         char *u_path, *j_path;
 552                         const char *state, *type;
 553                         uint32_t id;
 554                         DBusMessageIter sub2;
 555
 556                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 557                                 goto oom;
 558
 559                         id = (uint32_t) j->id;
 560                         state = job_state_to_string(j->state);
 561                         type = job_type_to_string(j->type);
 562
 563                         if (!(j_path = job_dbus_path(j)))
 564                                 goto oom;
 565
 566                         if (!(u_path = unit_dbus_path(j->unit))) {
 567                                 free(j_path);
 568                                 goto oom;
 569                         }
 570
 571                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 572                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 573                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 574                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 575                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 576                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 577                                 free(j_path);
 578                                 free(u_path);
 579                                 goto oom;
 580                         }
 581
 582                         free(j_path);
 583                         free(u_path);
 584
 585                         if (!dbus_message_iter_close_container(&sub, &sub2))
 586                                 goto oom;
 587                 }
 588
 589                 if (!dbus_message_iter_close_container(&iter, &sub))
 590                         goto oom;
 591
 592         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 593                 char *client;
 594                 Set *s;
 595
 596                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 597                         if (!(s = set_new(string_hash_func, string_compare_func)))
 598                                 goto oom;
 599
 600                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 601                                 set_free(s);
 602                                 goto oom;
 603                         }
 604                 }
 605
 606                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 607                         goto oom;
 608
 609                 if ((r = set_put(s, client)) < 0) {
 610                         free(client);
 611                         return bus_send_error_reply(m, connection, message, NULL, r);
 612                 }
 613
 614                 if (!(reply = dbus_message_new_method_return(message)))
 615                         goto oom;
 616
 617         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 618                 char *client;
 619
 620                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 621                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 622                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 623                 }
 624
 625                 free(client);
 626
 627                 if (!(reply = dbus_message_new_method_return(message)))
 628                         goto oom;
 629
 630         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 631                 FILE *f;
 632                 char *dump = NULL;
 633                 size_t size;
 634
 635                 if (!(reply = dbus_message_new_method_return(message)))
 636                         goto oom;
 637
 638                 if (!(f = open_memstream(&dump, &size)))
 639                         goto oom;
 640
 641                 manager_dump_units(m, f, NULL);
 642                 manager_dump_jobs(m, f, NULL);
 643
 644                 if (ferror(f)) {
 645                         fclose(f);
 646                         free(dump);
 647                         goto oom;
 648                 }
 649
 650                 fclose(f);
 651
 652                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 653                         free(dump);
 654                         goto oom;
 655                 }
 656
 657                 free(dump);
 658         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 659                 const char *name;
 660                 dbus_bool_t cleanup;
 661                 Snapshot *s;
 662
 663                 if (!dbus_message_get_args(
 664                                     message,
 665                                     &error,
 666                                     DBUS_TYPE_STRING, &name,
 667                                     DBUS_TYPE_BOOLEAN, &cleanup,
 668                                     DBUS_TYPE_INVALID))
 669                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 670
 671                 if (name && name[0] == 0)
 672                         name = NULL;
 673
 674                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 675                         return bus_send_error_reply(m, connection, message, &error, r);
 676
 677                 if (!(reply = dbus_message_new_method_return(message)))
 678                         goto oom;
 679
 680                 if (!(path = unit_dbus_path(UNIT(s))))
 681                         goto oom;
 682
 683                 if (!dbus_message_append_args(
 684                                     reply,
 685                                     DBUS_TYPE_OBJECT_PATH, &path,
 686                                     DBUS_TYPE_INVALID))
 687                         goto oom;
 688
 689         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 690                 char *introspection = NULL;
 691                 FILE *f;
 692                 Iterator i;
 693                 Unit *u;
 694                 Job *j;
 695                 const char *k;
 696                 size_t size;
 697
 698                 if (!(reply = dbus_message_new_method_return(message)))
 699                         goto oom;
 700
 701                 /* We roll our own introspection code here, instead of
 702                  * relying on bus_default_message_handler() because we
 703                  * need to generate our introspection string
 704                  * dynamically. */
 705
 706                 if (!(f = open_memstream(&introspection, &size)))
 707                         goto oom;
 708
 709                 fputs(INTROSPECTION_BEGIN, f);
 710
 711                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 712                         char *p;
 713
 714                         if (k != u->meta.id)
 715                                 continue;
 716
 717                         if (!(p = bus_path_escape(k))) {
 718                                 fclose(f);
 719                                 free(introspection);
 720                                 goto oom;
 721                         }
 722
 723                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 724                         free(p);
 725                 }
 726
 727                 HASHMAP_FOREACH(j, m->jobs, i)
 728                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 729
 730                 fputs(INTROSPECTION_END, f);
 731
 732                 if (ferror(f)) {
 733                         fclose(f);
 734                         free(introspection);
 735                         goto oom;
 736                 }
 737
 738                 fclose(f);
 739
 740                 if (!introspection)
 741                         goto oom;
 742
 743                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 744                         free(introspection);
 745                         goto oom;
 746                 }
 747
 748                 free(introspection);
 749
 750         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 751
 752                 assert(!m->queued_message);
 753
 754                 /* Instead of sending the reply back right away, we
 755                  * just remember that we need to and then send it
 756                  * after the reload is finished. That way the caller
 757                  * knows when the reload finished. */
 758
 759                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 760                         goto oom;
 761
 762                 m->queued_message_connection = connection;
 763                 m->exit_code = MANAGER_RELOAD;
 764
 765         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 766
 767                 if (!(reply = dbus_message_new_method_return(message)))
 768                         goto oom;
 769
 770                 m->exit_code = MANAGER_REEXECUTE;
 771
 772         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 773
 774                 if (m->running_as == MANAGER_SYSTEM) {
 775                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
 776                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 777                 }
 778
 779                 if (!(reply = dbus_message_new_method_return(message)))
 780                         goto oom;
 781
 782                 m->exit_code = MANAGER_EXIT;
 783
 784         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 785                 char **l = NULL, **e = NULL;
 786
 787                 if ((r = bus_parse_strv(message, &l)) < 0) {
 788                         if (r == -ENOMEM)
 789                                 goto oom;
 790
 791                         return bus_send_error_reply(m, connection, message, NULL, r);
 792                 }
 793
 794                 e = strv_env_merge(2, m->environment, l);
 795                 strv_free(l);
 796
 797                 if (!e)
 798                         goto oom;
 799
 800                 if (!(reply = dbus_message_new_method_return(message))) {
 801                         strv_free(e);
 802                         goto oom;
 803                 }
 804
 805                 strv_free(m->environment);
 806                 m->environment = e;
 807
 808         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 809                 char **l = NULL, **e = NULL;
 810
 811                 if ((r = bus_parse_strv(message, &l)) < 0) {
 812                         if (r == -ENOMEM)
 813                                 goto oom;
 814
 815                         return bus_send_error_reply(m, connection, message, NULL, r);
 816                 }
 817
 818                 e = strv_env_delete(m->environment, 1, l);
 819                 strv_free(l);
 820
 821                 if (!e)
 822                         goto oom;
 823
 824                 if (!(reply = dbus_message_new_method_return(message)))
 825                         goto oom;
 826
 827                 strv_free(m->environment);
 828                 m->environment = e;
 829
 830         } else
 831                 return bus_default_message_handler(m, connection, message, NULL, properties);
 832
 833         if (job_type != _JOB_TYPE_INVALID) {
 834                 const char *name, *smode;
 835                 JobMode mode;
 836                 Job *j;
 837                 Unit *u;
 838
 839                 if (!dbus_message_get_args(
 840                                     message,
 841                                     &error,
 842                                     DBUS_TYPE_STRING, &name,
 843                                     DBUS_TYPE_STRING, &smode,
 844                                     DBUS_TYPE_INVALID))
 845                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 846
 847                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
 848                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
 849                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 850                 }
 851
 852                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 853                         return bus_send_error_reply(m, connection, message, &error, r);
 854
 855                 if (reload_if_possible && unit_can_reload(u)) {
 856                         if (job_type == JOB_RESTART)
 857                                 job_type = JOB_RELOAD_OR_START;
 858                         else if (job_type == JOB_TRY_RESTART)
 859                                 job_type = JOB_RELOAD;
 860                 }
 861
 862                 if ((job_type == JOB_START && u->meta.refuse_manual_start) ||
 863                     (job_type == JOB_STOP && u->meta.refuse_manual_stop) ||
 864                     ((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&
 865                      (u->meta.refuse_manual_start || u->meta.refuse_manual_stop))) {
 866                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested by dependency only.");
 867                         return bus_send_error_reply(m, connection, message, &error, -EPERM);
 868                 }
 869
 870                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
 871                         return bus_send_error_reply(m, connection, message, &error, r);
 872
 873                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
 874                         goto oom;
 875
 876                 j->bus = connection;
 877
 878                 if (!(reply = dbus_message_new_method_return(message)))
 879                         goto oom;
 880
 881                 if (!(path = job_dbus_path(j)))
 882                         goto oom;
 883
 884                 if (!dbus_message_append_args(
 885                                     reply,
 886                                     DBUS_TYPE_OBJECT_PATH, &path,
 887                                     DBUS_TYPE_INVALID))
 888                         goto oom;
 889         }
 890
 891         free(path);
 892
 893         if (reply) {
 894                 if (!dbus_connection_send(connection, reply, NULL))
 895                         goto oom;
 896
 897                 dbus_message_unref(reply);
 898         }
 899
 900         return DBUS_HANDLER_RESULT_HANDLED;
 901
 902 oom:
 903         free(path);
 904
 905         if (reply)
 906                 dbus_message_unref(reply);
 907
 908         dbus_error_free(&error);
 909
 910         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 911 }
 912
 913 const DBusObjectPathVTable bus_manager_vtable = {
 914         .message_function = bus_manager_message_handler
 915 };