src/dbus-manager.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23
  24 #include "dbus.h"
  25 #include "log.h"
  26 #include "dbus-manager.h"
  27 #include "strv.h"
  28 #include "bus-errors.h"
  29
  30 #define BUS_MANAGER_INTERFACE_BEGIN                                     \
  31         " <interface name=\"org.freedesktop.systemd1.Manager\">\n"
  32
  33 #define BUS_MANAGER_INTERFACE_METHODS                                   \
  34         "  <method name=\"GetUnit\">\n"                                 \
  35         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  36         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  37         "  </method>\n"                                                 \
  38         "  <method name=\"GetUnitByPID\">\n"                            \
  39         "   <arg name=\"pid\" type=\"u\" direction=\"in\"/>\n"          \
  40         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  41         "  </method>\n"                                                 \
  42         "  <method name=\"LoadUnit\">\n"                                \
  43         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  44         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  45         "  </method>\n"                                                 \
  46         "  <method name=\"StartUnit\">\n"                               \
  47         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  48         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  49         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  50         "  </method>\n"                                                 \
  51         "  <method name=\"StopUnit\">\n"                                \
  52         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  53         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  54         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  55         "  </method>\n"                                                 \
  56         "  <method name=\"ReloadUnit\">\n"                              \
  57         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  58         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  59         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  60         "  </method>\n"                                                 \
  61         "  <method name=\"RestartUnit\">\n"                             \
  62         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  63         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  64         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  65         "  </method>\n"                                                 \
  66         "  <method name=\"TryRestartUnit\">\n"                          \
  67         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  68         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  69         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  70         "  </method>\n"                                                 \
  71         "  <method name=\"ReloadOrRestartUnit\">\n"                     \
  72         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  73         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  74         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  75         "  </method>\n"                                                 \
  76         "  <method name=\"ReloadOrTryRestartUnit\">\n"                  \
  77         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  78         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  79         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  80         "  </method>\n"                                                 \
  81         "  <method name=\"ResetFailedUnit\">\n"                         \
  82         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  83         "  </method>\n"                                                 \
  84         "  <method name=\"GetJob\">\n"                                  \
  85         "   <arg name=\"id\" type=\"u\" direction=\"in\"/>\n"           \
  86         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  87         "  </method>\n"                                                 \
  88         "  <method name=\"ClearJobs\"/>\n"                              \
  89         "  <method name=\"ResetFailed\"/>\n"                            \
  90         "  <method name=\"ListUnits\">\n"                               \
  91         "   <arg name=\"units\" type=\"a(ssssssouso)\" direction=\"out\"/>\n" \
  92         "  </method>\n"                                                 \
  93         "  <method name=\"ListJobs\">\n"                                \
  94         "   <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>\n" \
  95         "  </method>\n"                                                 \
  96         "  <method name=\"Subscribe\"/>\n"                              \
  97         "  <method name=\"Unsubscribe\"/>\n"                            \
  98         "  <method name=\"Dump\"/>\n"                                   \
  99         "  <method name=\"CreateSnapshot\">\n"                          \
 100         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
 101         "   <arg name=\"cleanup\" type=\"b\" direction=\"in\"/>\n"      \
 102         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
 103         "  </method>\n"                                                 \
 104         "  <method name=\"Reload\"/>\n"                                 \
 105         "  <method name=\"Reexecute\"/>\n"                              \
 106         "  <method name=\"Exit\"/>\n"                                   \
 107         "  <method name=\"SetEnvironment\">\n"                          \
 108         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 109         "  </method>\n"                                                 \
 110         "  <method name=\"UnsetEnvironment\">\n"                        \
 111         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
 112         "  </method>\n"
 113
 114 #define BUS_MANAGER_INTERFACE_SIGNALS                                   \
 115         "  <signal name=\"UnitNew\">\n"                                 \
 116         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 117         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 118         "  </signal>\n"                                                 \
 119         "  <signal name=\"UnitRemoved\">\n"                             \
 120         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 121         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
 122         "  </signal>\n"                                                 \
 123         "  <signal name=\"JobNew\">\n"                                  \
 124         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 125         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 126         "  </signal>\n"                                                 \
 127         "  <signal name=\"JobRemoved\">\n"                              \
 128         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 129         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 130         "   <arg name=\"success\" type=\"b\"/>\n"                       \
 131         "  </signal>"
 132
 133
 134 #define BUS_MANAGER_INTERFACE_PROPERTIES_GENERAL                        \
 135         "  <property name=\"Version\" type=\"s\" access=\"read\"/>\n"   \
 136         "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
 137         "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
 138         "  <property name=\"LogLevel\" type=\"s\" access=\"read\"/>\n"  \
 139         "  <property name=\"LogTarget\" type=\"s\" access=\"read\"/>\n" \
 140         "  <property name=\"NNames\" type=\"u\" access=\"read\"/>\n"    \
 141         "  <property name=\"NJobs\" type=\"u\" access=\"read\"/>\n"     \
 142         "  <property name=\"NInstalledJobs\" type=\"u\" access=\"read\"/>\n" \
 143         "  <property name=\"NFailedJobs\" type=\"u\" access=\"read\"/>\n" \
 144         "  <property name=\"Progress\" type=\"d\" access=\"read\"/>\n"  \
 145         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
 146         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
 147         "  <property name=\"ShowStatus\" type=\"b\" access=\"read\"/>\n" \
 148         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
 149         "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
 150         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 151         "  <property name=\"MountAuto\" type=\"b\" access=\"read\"/>\n" \
 152         "  <property name=\"SwapAuto\" type=\"b\" access=\"read\"/>\n"
 153
 154 #ifdef HAVE_SYSV_COMPAT
 155 #define BUS_MANAGER_INTERFACE_PROPERTIES_SYSV                           \
 156         "  <property name=\"SysVConsole\" type=\"b\" access=\"read\"/>\n" \
 157         "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
 158         "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n"
 159 #else
 160 #define BUS_MANAGER_INTERFACE_PROPERTIES_SYSV
 161 #endif
 162
 163 #define BUS_MANAGER_INTERFACE_END                                       \
 164         " </interface>\n"
 165
 166 #define BUS_MANAGER_INTERFACE                                           \
 167         BUS_MANAGER_INTERFACE_BEGIN                                     \
 168         BUS_MANAGER_INTERFACE_METHODS                                   \
 169         BUS_MANAGER_INTERFACE_SIGNALS                                   \
 170         BUS_MANAGER_INTERFACE_PROPERTIES_GENERAL                        \
 171         BUS_MANAGER_INTERFACE_PROPERTIES_SYSV                           \
 172         BUS_MANAGER_INTERFACE_END
 173
 174 #define INTROSPECTION_BEGIN                                             \
 175         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 176         "<node>\n"                                                      \
 177         BUS_MANAGER_INTERFACE                                           \
 178         BUS_PROPERTIES_INTERFACE                                        \
 179         BUS_PEER_INTERFACE                                              \
 180         BUS_INTROSPECTABLE_INTERFACE
 181
 182 #define INTROSPECTION_END                                               \
 183         "</node>\n"
 184
 185 const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
 186
 187 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 188
 189 static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 190         const char *t;
 191
 192         assert(m);
 193         assert(i);
 194         assert(property);
 195
 196         t = log_target_to_string(log_get_target());
 197
 198         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 199                 return -ENOMEM;
 200
 201         return 0;
 202 }
 203
 204 static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 205         const char *t;
 206
 207         assert(m);
 208         assert(i);
 209         assert(property);
 210
 211         t = log_level_to_string(log_get_max_level());
 212
 213         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 214                 return -ENOMEM;
 215
 216         return 0;
 217 }
 218
 219 static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 220         uint32_t u;
 221
 222         assert(m);
 223         assert(i);
 224         assert(property);
 225
 226         u = hashmap_size(m->units);
 227
 228         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 229                 return -ENOMEM;
 230
 231         return 0;
 232 }
 233
 234 static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 235         uint32_t u;
 236
 237         assert(m);
 238         assert(i);
 239         assert(property);
 240
 241         u = hashmap_size(m->jobs);
 242
 243         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 244                 return -ENOMEM;
 245
 246         return 0;
 247 }
 248
 249 static int bus_manager_append_progress(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 250         double d;
 251
 252         assert(m);
 253         assert(i);
 254         assert(property);
 255
 256         if (dual_timestamp_is_set(&m->finish_timestamp))
 257                 d = 1.0;
 258         else
 259                 d = 1.0 - ((double) hashmap_size(m->jobs) / (double) m->n_installed_jobs);
 260
 261         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_DOUBLE, &d))
 262                 return -ENOMEM;
 263
 264         return 0;
 265 }
 266
 267 static const char *message_get_sender_with_fallback(DBusMessage *m) {
 268         const char *s;
 269
 270         assert(m);
 271
 272         if ((s = dbus_message_get_sender(m)))
 273                 return s;
 274
 275         /* When the message came in from a direct connection the
 276          * message will have no sender. We fix that here. */
 277
 278         return ":no-sender";
 279 }
 280
 281 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 282         Manager *m = data;
 283
 284         const BusProperty properties[] = {
 285                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 286                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 287                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 288                 { "org.freedesktop.systemd1.Manager", "FinishTimestamp", bus_property_append_uint64,  "t",  &m->finish_timestamp.realtime },
 289                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 290                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 291                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 292                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 293                 { "org.freedesktop.systemd1.Manager", "NInstalledJobs",bus_property_append_uint32,    "u",  &m->n_installed_jobs },
 294                 { "org.freedesktop.systemd1.Manager", "NFailedJobs",   bus_property_append_uint32,    "u",  &m->n_failed_jobs  },
 295                 { "org.freedesktop.systemd1.Manager", "Progress",      bus_manager_append_progress,   "d",  NULL               },
 296                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 297                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 298                 { "org.freedesktop.systemd1.Manager", "ShowStatus",    bus_property_append_bool,      "b",  &m->show_status    },
 299                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 300                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 301                 { "org.freedesktop.systemd1.Manager", "ControlGroupHierarchy", bus_property_append_string, "s", m->cgroup_hierarchy },
 302                 { "org.freedesktop.systemd1.Manager", "MountAuto",     bus_property_append_bool,      "b",  &m->mount_auto     },
 303                 { "org.freedesktop.systemd1.Manager", "SwapAuto",      bus_property_append_bool,      "b",  &m->swap_auto     },
 304 #ifdef HAVE_SYSV_COMPAT
 305                 { "org.freedesktop.systemd1.Manager", "SysVConsole",   bus_property_append_bool,      "b",  &m->sysv_console   },
 306                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 307                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 308 #endif
 309                 { NULL, NULL, NULL, NULL, NULL }
 310         };
 311
 312         int r;
 313         DBusError error;
 314         DBusMessage *reply = NULL;
 315         char * path = NULL;
 316         JobType job_type = _JOB_TYPE_INVALID;
 317         bool reload_if_possible = false;
 318
 319         assert(connection);
 320         assert(message);
 321         assert(m);
 322
 323         dbus_error_init(&error);
 324
 325         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 326                 const char *name;
 327                 Unit *u;
 328
 329                 if (!dbus_message_get_args(
 330                                     message,
 331                                     &error,
 332                                     DBUS_TYPE_STRING, &name,
 333                                     DBUS_TYPE_INVALID))
 334                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 335
 336                 if (!(u = manager_get_unit(m, name))) {
 337                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 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", "GetUnitByPID")) {
 353                 Unit *u;
 354                 uint32_t pid;
 355
 356                 if (!dbus_message_get_args(
 357                                     message,
 358                                     &error,
 359                                     DBUS_TYPE_UINT32, &pid,
 360                                     DBUS_TYPE_INVALID))
 361                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 362
 363                 if (!(u = cgroup_unit_by_pid(m, (pid_t) pid))) {
 364                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "No unit for PID %lu is loaded.", (unsigned long) pid);
 365                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 366                 }
 367
 368                 if (!(reply = dbus_message_new_method_return(message)))
 369                         goto oom;
 370
 371                 if (!(path = unit_dbus_path(u)))
 372                         goto oom;
 373
 374                 if (!dbus_message_append_args(
 375                                     reply,
 376                                     DBUS_TYPE_OBJECT_PATH, &path,
 377                                     DBUS_TYPE_INVALID))
 378                         goto oom;
 379         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 380                 const char *name;
 381                 Unit *u;
 382
 383                 if (!dbus_message_get_args(
 384                                     message,
 385                                     &error,
 386                                     DBUS_TYPE_STRING, &name,
 387                                     DBUS_TYPE_INVALID))
 388                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 389
 390                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 391                         return bus_send_error_reply(m, connection, message, &error, r);
 392
 393                 if (!(reply = dbus_message_new_method_return(message)))
 394                         goto oom;
 395
 396                 if (!(path = unit_dbus_path(u)))
 397                         goto oom;
 398
 399                 if (!dbus_message_append_args(
 400                                     reply,
 401                                     DBUS_TYPE_OBJECT_PATH, &path,
 402                                     DBUS_TYPE_INVALID))
 403                         goto oom;
 404
 405         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 406                 job_type = JOB_START;
 407         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 408                 job_type = JOB_STOP;
 409         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 410                 job_type = JOB_RELOAD;
 411         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 412                 job_type = JOB_RESTART;
 413         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 414                 job_type = JOB_TRY_RESTART;
 415         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrRestartUnit")) {
 416                 reload_if_possible = true;
 417                 job_type = JOB_RESTART;
 418         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadOrTryRestartUnit")) {
 419                 reload_if_possible = true;
 420                 job_type = JOB_TRY_RESTART;
 421         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 422                 uint32_t id;
 423                 Job *j;
 424
 425                 if (!dbus_message_get_args(
 426                                     message,
 427                                     &error,
 428                                     DBUS_TYPE_UINT32, &id,
 429                                     DBUS_TYPE_INVALID))
 430                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 431
 432                 if (!(j = manager_get_job(m, id))) {
 433                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_JOB, "Job %u does not exist.", (unsigned) id);
 434                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 435                 }
 436
 437                 if (!(reply = dbus_message_new_method_return(message)))
 438                         goto oom;
 439
 440                 if (!(path = job_dbus_path(j)))
 441                         goto oom;
 442
 443                 if (!dbus_message_append_args(
 444                                     reply,
 445                                     DBUS_TYPE_OBJECT_PATH, &path,
 446                                     DBUS_TYPE_INVALID))
 447                         goto oom;
 448
 449         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 450
 451                 manager_clear_jobs(m);
 452
 453                 if (!(reply = dbus_message_new_method_return(message)))
 454                         goto oom;
 455
 456         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailed")) {
 457
 458                 manager_reset_failed(m);
 459
 460                 if (!(reply = dbus_message_new_method_return(message)))
 461                         goto oom;
 462
 463         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ResetFailedUnit")) {
 464                 const char *name;
 465                 Unit *u;
 466
 467                 if (!dbus_message_get_args(
 468                                     message,
 469                                     &error,
 470                                     DBUS_TYPE_STRING, &name,
 471                                     DBUS_TYPE_INVALID))
 472                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 473
 474                 if (!(u = manager_get_unit(m, name))) {
 475                         dbus_set_error(&error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s is not loaded.", name);
 476                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 477                 }
 478
 479                 unit_reset_failed(u);
 480
 481                 if (!(reply = dbus_message_new_method_return(message)))
 482                         goto oom;
 483
 484         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 485                 DBusMessageIter iter, sub;
 486                 Iterator i;
 487                 Unit *u;
 488                 const char *k;
 489
 490                 if (!(reply = dbus_message_new_method_return(message)))
 491                         goto oom;
 492
 493                 dbus_message_iter_init_append(reply, &iter);
 494
 495                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssssouso)", &sub))
 496                         goto oom;
 497
 498                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 499                         char *u_path, *j_path;
 500                         const char *description, *load_state, *active_state, *sub_state, *sjob_type, *following;
 501                         DBusMessageIter sub2;
 502                         uint32_t job_id;
 503                         Unit *f;
 504
 505                         if (k != u->meta.id)
 506                                 continue;
 507
 508                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 509                                 goto oom;
 510
 511                         description = unit_description(u);
 512                         load_state = unit_load_state_to_string(u->meta.load_state);
 513                         active_state = unit_active_state_to_string(unit_active_state(u));
 514                         sub_state = unit_sub_state_to_string(u);
 515
 516                         f = unit_following(u);
 517                         following = f ? f->meta.id : "";
 518
 519                         if (!(u_path = unit_dbus_path(u)))
 520                                 goto oom;
 521
 522                         if (u->meta.job) {
 523                                 job_id = (uint32_t) u->meta.job->id;
 524
 525                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 526                                         free(u_path);
 527                                         goto oom;
 528                                 }
 529
 530                                 sjob_type = job_type_to_string(u->meta.job->type);
 531                         } else {
 532                                 job_id = 0;
 533                                 j_path = u_path;
 534                                 sjob_type = "";
 535                         }
 536
 537                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 538                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 539                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 540                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 541                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 542                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &following) ||
 543                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 544                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 545                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 546                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 547                                 free(u_path);
 548                                 if (u->meta.job)
 549                                         free(j_path);
 550                                 goto oom;
 551                         }
 552
 553                         free(u_path);
 554                         if (u->meta.job)
 555                                 free(j_path);
 556
 557                         if (!dbus_message_iter_close_container(&sub, &sub2))
 558                                 goto oom;
 559                 }
 560
 561                 if (!dbus_message_iter_close_container(&iter, &sub))
 562                         goto oom;
 563
 564         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 565                 DBusMessageIter iter, sub;
 566                 Iterator i;
 567                 Job *j;
 568
 569                 if (!(reply = dbus_message_new_method_return(message)))
 570                         goto oom;
 571
 572                 dbus_message_iter_init_append(reply, &iter);
 573
 574                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 575                         goto oom;
 576
 577                 HASHMAP_FOREACH(j, m->jobs, i) {
 578                         char *u_path, *j_path;
 579                         const char *state, *type;
 580                         uint32_t id;
 581                         DBusMessageIter sub2;
 582
 583                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 584                                 goto oom;
 585
 586                         id = (uint32_t) j->id;
 587                         state = job_state_to_string(j->state);
 588                         type = job_type_to_string(j->type);
 589
 590                         if (!(j_path = job_dbus_path(j)))
 591                                 goto oom;
 592
 593                         if (!(u_path = unit_dbus_path(j->unit))) {
 594                                 free(j_path);
 595                                 goto oom;
 596                         }
 597
 598                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 599                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 600                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 601                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 602                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 603                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 604                                 free(j_path);
 605                                 free(u_path);
 606                                 goto oom;
 607                         }
 608
 609                         free(j_path);
 610                         free(u_path);
 611
 612                         if (!dbus_message_iter_close_container(&sub, &sub2))
 613                                 goto oom;
 614                 }
 615
 616                 if (!dbus_message_iter_close_container(&iter, &sub))
 617                         goto oom;
 618
 619         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 620                 char *client;
 621                 Set *s;
 622
 623                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 624                         if (!(s = set_new(string_hash_func, string_compare_func)))
 625                                 goto oom;
 626
 627                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 628                                 set_free(s);
 629                                 goto oom;
 630                         }
 631                 }
 632
 633                 if (!(client = strdup(message_get_sender_with_fallback(message))))
 634                         goto oom;
 635
 636                 if ((r = set_put(s, client)) < 0) {
 637                         free(client);
 638                         return bus_send_error_reply(m, connection, message, NULL, r);
 639                 }
 640
 641                 if (!(reply = dbus_message_new_method_return(message)))
 642                         goto oom;
 643
 644         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 645                 char *client;
 646
 647                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) message_get_sender_with_fallback(message)))) {
 648                         dbus_set_error(&error, BUS_ERROR_NOT_SUBSCRIBED, "Client is not subscribed.");
 649                         return bus_send_error_reply(m, connection, message, &error, -ENOENT);
 650                 }
 651
 652                 free(client);
 653
 654                 if (!(reply = dbus_message_new_method_return(message)))
 655                         goto oom;
 656
 657         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 658                 FILE *f;
 659                 char *dump = NULL;
 660                 size_t size;
 661
 662                 if (!(reply = dbus_message_new_method_return(message)))
 663                         goto oom;
 664
 665                 if (!(f = open_memstream(&dump, &size)))
 666                         goto oom;
 667
 668                 manager_dump_units(m, f, NULL);
 669                 manager_dump_jobs(m, f, NULL);
 670
 671                 if (ferror(f)) {
 672                         fclose(f);
 673                         free(dump);
 674                         goto oom;
 675                 }
 676
 677                 fclose(f);
 678
 679                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 680                         free(dump);
 681                         goto oom;
 682                 }
 683
 684                 free(dump);
 685         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 686                 const char *name;
 687                 dbus_bool_t cleanup;
 688                 Snapshot *s;
 689
 690                 if (!dbus_message_get_args(
 691                                     message,
 692                                     &error,
 693                                     DBUS_TYPE_STRING, &name,
 694                                     DBUS_TYPE_BOOLEAN, &cleanup,
 695                                     DBUS_TYPE_INVALID))
 696                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 697
 698                 if (name && name[0] == 0)
 699                         name = NULL;
 700
 701                 if ((r = snapshot_create(m, name, cleanup, &error, &s)) < 0)
 702                         return bus_send_error_reply(m, connection, message, &error, r);
 703
 704                 if (!(reply = dbus_message_new_method_return(message)))
 705                         goto oom;
 706
 707                 if (!(path = unit_dbus_path(UNIT(s))))
 708                         goto oom;
 709
 710                 if (!dbus_message_append_args(
 711                                     reply,
 712                                     DBUS_TYPE_OBJECT_PATH, &path,
 713                                     DBUS_TYPE_INVALID))
 714                         goto oom;
 715
 716         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 717                 char *introspection = NULL;
 718                 FILE *f;
 719                 Iterator i;
 720                 Unit *u;
 721                 Job *j;
 722                 const char *k;
 723                 size_t size;
 724
 725                 if (!(reply = dbus_message_new_method_return(message)))
 726                         goto oom;
 727
 728                 /* We roll our own introspection code here, instead of
 729                  * relying on bus_default_message_handler() because we
 730                  * need to generate our introspection string
 731                  * dynamically. */
 732
 733                 if (!(f = open_memstream(&introspection, &size)))
 734                         goto oom;
 735
 736                 fputs(INTROSPECTION_BEGIN, f);
 737
 738                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 739                         char *p;
 740
 741                         if (k != u->meta.id)
 742                                 continue;
 743
 744                         if (!(p = bus_path_escape(k))) {
 745                                 fclose(f);
 746                                 free(introspection);
 747                                 goto oom;
 748                         }
 749
 750                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 751                         free(p);
 752                 }
 753
 754                 HASHMAP_FOREACH(j, m->jobs, i)
 755                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 756
 757                 fputs(INTROSPECTION_END, f);
 758
 759                 if (ferror(f)) {
 760                         fclose(f);
 761                         free(introspection);
 762                         goto oom;
 763                 }
 764
 765                 fclose(f);
 766
 767                 if (!introspection)
 768                         goto oom;
 769
 770                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 771                         free(introspection);
 772                         goto oom;
 773                 }
 774
 775                 free(introspection);
 776
 777         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 778
 779                 assert(!m->queued_message);
 780
 781                 /* Instead of sending the reply back right away, we
 782                  * just remember that we need to and then send it
 783                  * after the reload is finished. That way the caller
 784                  * knows when the reload finished. */
 785
 786                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 787                         goto oom;
 788
 789                 m->queued_message_connection = connection;
 790                 m->exit_code = MANAGER_RELOAD;
 791
 792         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 793
 794                 if (!(reply = dbus_message_new_method_return(message)))
 795                         goto oom;
 796
 797                 m->exit_code = MANAGER_REEXECUTE;
 798
 799         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 800
 801                 if (m->running_as == MANAGER_SYSTEM) {
 802                         dbus_set_error(&error, BUS_ERROR_NOT_SUPPORTED, "Exit is only supported for session managers.");
 803                         return bus_send_error_reply(m, connection, message, &error, -ENOTSUP);
 804                 }
 805
 806                 if (!(reply = dbus_message_new_method_return(message)))
 807                         goto oom;
 808
 809                 m->exit_code = MANAGER_EXIT;
 810
 811         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 812                 char **l = NULL, **e = NULL;
 813
 814                 if ((r = bus_parse_strv(message, &l)) < 0) {
 815                         if (r == -ENOMEM)
 816                                 goto oom;
 817
 818                         return bus_send_error_reply(m, connection, message, NULL, r);
 819                 }
 820
 821                 e = strv_env_merge(2, m->environment, l);
 822                 strv_free(l);
 823
 824                 if (!e)
 825                         goto oom;
 826
 827                 if (!(reply = dbus_message_new_method_return(message))) {
 828                         strv_free(e);
 829                         goto oom;
 830                 }
 831
 832                 strv_free(m->environment);
 833                 m->environment = e;
 834
 835         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 836                 char **l = NULL, **e = NULL;
 837
 838                 if ((r = bus_parse_strv(message, &l)) < 0) {
 839                         if (r == -ENOMEM)
 840                                 goto oom;
 841
 842                         return bus_send_error_reply(m, connection, message, NULL, r);
 843                 }
 844
 845                 e = strv_env_delete(m->environment, 1, l);
 846                 strv_free(l);
 847
 848                 if (!e)
 849                         goto oom;
 850
 851                 if (!(reply = dbus_message_new_method_return(message)))
 852                         goto oom;
 853
 854                 strv_free(m->environment);
 855                 m->environment = e;
 856
 857         } else
 858                 return bus_default_message_handler(m, connection, message, NULL, properties);
 859
 860         if (job_type != _JOB_TYPE_INVALID) {
 861                 const char *name, *smode;
 862                 JobMode mode;
 863                 Job *j;
 864                 Unit *u;
 865
 866                 if (!dbus_message_get_args(
 867                                     message,
 868                                     &error,
 869                                     DBUS_TYPE_STRING, &name,
 870                                     DBUS_TYPE_STRING, &smode,
 871                                     DBUS_TYPE_INVALID))
 872                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 873
 874                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
 875                         dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
 876                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 877                 }
 878
 879                 if ((r = manager_load_unit(m, name, NULL, &error, &u)) < 0)
 880                         return bus_send_error_reply(m, connection, message, &error, r);
 881
 882                 if (reload_if_possible && unit_can_reload(u)) {
 883                         if (job_type == JOB_RESTART)
 884                                 job_type = JOB_RELOAD_OR_START;
 885                         else if (job_type == JOB_TRY_RESTART)
 886                                 job_type = JOB_RELOAD;
 887                 }
 888
 889                 if ((job_type == JOB_START && u->meta.refuse_manual_start) ||
 890                     (job_type == JOB_STOP && u->meta.refuse_manual_stop) ||
 891                     ((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&
 892                      (u->meta.refuse_manual_start || u->meta.refuse_manual_stop))) {
 893                         dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested by dependency only.");
 894                         return bus_send_error_reply(m, connection, message, &error, -EPERM);
 895                 }
 896
 897                 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
 898                         return bus_send_error_reply(m, connection, message, &error, r);
 899
 900                 if (!(j->bus_client = strdup(message_get_sender_with_fallback(message))))
 901                         goto oom;
 902
 903                 j->bus = connection;
 904
 905                 if (!(reply = dbus_message_new_method_return(message)))
 906                         goto oom;
 907
 908                 if (!(path = job_dbus_path(j)))
 909                         goto oom;
 910
 911                 if (!dbus_message_append_args(
 912                                     reply,
 913                                     DBUS_TYPE_OBJECT_PATH, &path,
 914                                     DBUS_TYPE_INVALID))
 915                         goto oom;
 916         }
 917
 918         free(path);
 919
 920         if (reply) {
 921                 if (!dbus_connection_send(connection, reply, NULL))
 922                         goto oom;
 923
 924                 dbus_message_unref(reply);
 925         }
 926
 927         return DBUS_HANDLER_RESULT_HANDLED;
 928
 929 oom:
 930         free(path);
 931
 932         if (reply)
 933                 dbus_message_unref(reply);
 934
 935         dbus_error_free(&error);
 936
 937         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 938 }
 939
 940 const DBusObjectPathVTable bus_manager_vtable = {
 941         .message_function = bus_manager_message_handler
 942 };