src/dbus-manager.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   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
  29 #define BUS_MANAGER_INTERFACE                                           \
  30         " <interface name=\"org.freedesktop.systemd1.Manager\">\n"      \
  31         "  <method name=\"GetUnit\">\n"                                 \
  32         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  33         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  34         "  </method>\n"                                                 \
  35         "  <method name=\"LoadUnit\">\n"                                \
  36         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  37         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  38         "  </method>\n"                                                 \
  39         "  <method name=\"StartUnit\">\n"                               \
  40         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  41         "   <arg name=\"mode\" type=\"s\" direction=\"in\"/>\n"         \
  42         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  43         "  </method>\n"                                                 \
  44         "  <method name=\"StopUnit\">\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=\"ReloadUnit\">\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=\"RestartUnit\">\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=\"TryRestartUnit\">\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=\"GetJob\">\n"                                  \
  65         "   <arg name=\"id\" type=\"u\" direction=\"in\"/>\n"           \
  66         "   <arg name=\"job\" type=\"o\" direction=\"out\"/>\n"         \
  67         "  </method>\n"                                                 \
  68         "  <method name=\"ClearJobs\"/>\n"                              \
  69         "  <method name=\"ListUnits\">\n"                               \
  70         "   <arg name=\"units\" type=\"a(sssssouso)\" direction=\"out\"/>\n" \
  71         "  </method>\n"                                                 \
  72         "  <method name=\"ListJobs\">\n"                                \
  73         "   <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>\n" \
  74         "  </method>\n"                                                 \
  75         "  <method name=\"Subscribe\"/>\n"                              \
  76         "  <method name=\"Unsubscribe\"/>\n"                            \
  77         "  <method name=\"Dump\"/>\n"                                   \
  78         "  <method name=\"CreateSnapshot\">\n"                          \
  79         "   <arg name=\"name\" type=\"s\" direction=\"in\"/>\n"         \
  80         "   <arg nane=\"cleanup\" type=\"b\" direction=\"in\"/>\n"      \
  81         "   <arg name=\"unit\" type=\"o\" direction=\"out\"/>\n"        \
  82         "  </method>\n"                                                 \
  83         "  <method name=\"Reload\"/>\n"                                 \
  84         "  <method name=\"Reexecute\"/>\n"                              \
  85         "  <method name=\"Exit\"/>\n"                                   \
  86         "  <method name=\"SetEnvironment\">\n"                          \
  87         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
  88         "  </method>\n"                                                 \
  89         "  <method name=\"UnsetEnvironment\">\n"                        \
  90         "   <arg name=\"names\" type=\"as\" direction=\"in\"/>\n"       \
  91         "  </method>\n"                                                 \
  92         "  <signal name=\"UnitNew\">\n"                                 \
  93         "   <arg name=\"id\" type=\"s\"/>\n"                            \
  94         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
  95         "  </signal>\n"                                                 \
  96         "  <signal name=\"UnitRemoved\">\n"                             \
  97         "   <arg name=\"id\" type=\"s\"/>\n"                            \
  98         "   <arg name=\"unit\" type=\"o\"/>\n"                          \
  99         "  </signal>\n"                                                 \
 100         "  <signal name=\"JobNew\">\n"                                  \
 101         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 102         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 103         "  </signal>\n"                                                 \
 104         "  <signal name=\"JobRemoved\">\n"                              \
 105         "   <arg name=\"id\" type=\"u\"/>\n"                            \
 106         "   <arg name=\"job\" type=\"o\"/>\n"                           \
 107         "   <arg name=\"success\" type=\"b\"/>\n"                       \
 108         "  </signal>"                                                   \
 109         "  <property name=\"Version\" type=\"s\" access=\"read\"/>\n"   \
 110         "  <property name=\"RunningAs\" type=\"s\" access=\"read\"/>\n" \
 111         "  <property name=\"StartupTimestamp\" type=\"t\" access=\"read\"/>\n" \
 112         "  <property name=\"LogLevel\" type=\"s\" access=\"read\"/>\n"  \
 113         "  <property name=\"LogTarget\" type=\"s\" access=\"read\"/>\n" \
 114         "  <property name=\"NNames\" type=\"u\" access=\"read\"/>\n"    \
 115         "  <property name=\"NJobs\" type=\"u\" access=\"read\"/>\n"     \
 116         "  <property name=\"Environment\" type=\"as\" access=\"read\"/>\n" \
 117         "  <property name=\"ConfirmSpawn\" type=\"b\" access=\"read\"/>\n" \
 118         "  <property name=\"UnitPath\" type=\"as\" access=\"read\"/>\n" \
 119         "  <property name=\"SysVInitPath\" type=\"as\" access=\"read\"/>\n" \
 120         "  <property name=\"SysVRcndPath\" type=\"as\" access=\"read\"/>\n" \
 121         "  <property name=\"NotifySocket\" type=\"s\" access=\"read\"/>\n" \
 122         " </interface>\n"
 123
 124 #define INTROSPECTION_BEGIN                                             \
 125         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 126         "<node>\n"                                                      \
 127         BUS_MANAGER_INTERFACE                                           \
 128         BUS_PROPERTIES_INTERFACE                                        \
 129         BUS_INTROSPECTABLE_INTERFACE
 130
 131 #define INTROSPECTION_END                                               \
 132         "</node>\n"
 133
 134 const char bus_manager_interface[] = BUS_MANAGER_INTERFACE;
 135
 136 static DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
 137
 138 static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 139         const char *t;
 140
 141         assert(m);
 142         assert(i);
 143         assert(property);
 144
 145         t = log_target_to_string(log_get_target());
 146
 147         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 148                 return -ENOMEM;
 149
 150         return 0;
 151 }
 152
 153 static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 154         const char *t;
 155
 156         assert(m);
 157         assert(i);
 158         assert(property);
 159
 160         t = log_level_to_string(log_get_max_level());
 161
 162         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
 163                 return -ENOMEM;
 164
 165         return 0;
 166 }
 167
 168 static int bus_manager_append_n_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 169         uint32_t u;
 170
 171         assert(m);
 172         assert(i);
 173         assert(property);
 174
 175         u = hashmap_size(m->units);
 176
 177         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 178                 return -ENOMEM;
 179
 180         return 0;
 181 }
 182
 183 static int bus_manager_append_n_jobs(Manager *m, DBusMessageIter *i, const char *property, void *data) {
 184         uint32_t u;
 185
 186         assert(m);
 187         assert(i);
 188         assert(property);
 189
 190         u = hashmap_size(m->jobs);
 191
 192         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, &u))
 193                 return -ENOMEM;
 194
 195         return 0;
 196 }
 197
 198 static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
 199         Manager *m = data;
 200
 201         const BusProperty properties[] = {
 202                 { "org.freedesktop.systemd1.Manager", "Version",       bus_property_append_string,    "s",  PACKAGE_STRING     },
 203                 { "org.freedesktop.systemd1.Manager", "RunningAs",     bus_manager_append_running_as, "s",  &m->running_as     },
 204                 { "org.freedesktop.systemd1.Manager", "StartupTimestamp", bus_property_append_uint64, "t",  &m->startup_timestamp.realtime },
 205                 { "org.freedesktop.systemd1.Manager", "LogLevel",      bus_manager_append_log_level,  "s",  NULL               },
 206                 { "org.freedesktop.systemd1.Manager", "LogTarget",     bus_manager_append_log_target, "s",  NULL               },
 207                 { "org.freedesktop.systemd1.Manager", "NNames",        bus_manager_append_n_names,    "u",  NULL               },
 208                 { "org.freedesktop.systemd1.Manager", "NJobs",         bus_manager_append_n_jobs,     "u",  NULL               },
 209                 { "org.freedesktop.systemd1.Manager", "Environment",   bus_property_append_strv,      "as", m->environment     },
 210                 { "org.freedesktop.systemd1.Manager", "ConfirmSpawn",  bus_property_append_bool,      "b",  &m->confirm_spawn  },
 211                 { "org.freedesktop.systemd1.Manager", "UnitPath",      bus_property_append_strv,      "as", m->lookup_paths.unit_path },
 212                 { "org.freedesktop.systemd1.Manager", "SysVInitPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvinit_path },
 213                 { "org.freedesktop.systemd1.Manager", "SysVRcndPath",  bus_property_append_strv,      "as", m->lookup_paths.sysvrcnd_path },
 214                 { "org.freedesktop.systemd1.Manager", "NotifySocket",  bus_property_append_string,    "s",  m->notify_socket   },
 215                 { NULL, NULL, NULL, NULL, NULL }
 216         };
 217
 218         int r;
 219         DBusError error;
 220         DBusMessage *reply = NULL;
 221         char * path = NULL;
 222         JobType job_type = _JOB_TYPE_INVALID;
 223
 224         assert(connection);
 225         assert(message);
 226         assert(m);
 227
 228         dbus_error_init(&error);
 229
 230         log_debug("Got D-Bus request: %s.%s() on %s",
 231                   dbus_message_get_interface(message),
 232                   dbus_message_get_member(message),
 233                   dbus_message_get_path(message));
 234
 235         if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetUnit")) {
 236                 const char *name;
 237                 Unit *u;
 238
 239                 if (!dbus_message_get_args(
 240                                     message,
 241                                     &error,
 242                                     DBUS_TYPE_STRING, &name,
 243                                     DBUS_TYPE_INVALID))
 244                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 245
 246                 if (!(u = manager_get_unit(m, name)))
 247                         return bus_send_error_reply(m, connection, message, NULL, -ENOENT);
 248
 249                 if (!(reply = dbus_message_new_method_return(message)))
 250                         goto oom;
 251
 252                 if (!(path = unit_dbus_path(u)))
 253                         goto oom;
 254
 255                 if (!dbus_message_append_args(
 256                                     reply,
 257                                     DBUS_TYPE_OBJECT_PATH, &path,
 258                                     DBUS_TYPE_INVALID))
 259                         goto oom;
 260
 261         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "LoadUnit")) {
 262                 const char *name;
 263                 Unit *u;
 264
 265                 if (!dbus_message_get_args(
 266                                     message,
 267                                     &error,
 268                                     DBUS_TYPE_STRING, &name,
 269                                     DBUS_TYPE_INVALID))
 270                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 271
 272                 if ((r = manager_load_unit(m, name, NULL, &u)) < 0)
 273                         return bus_send_error_reply(m, connection, message, NULL, r);
 274
 275                 if (!(reply = dbus_message_new_method_return(message)))
 276                         goto oom;
 277
 278                 if (!(path = unit_dbus_path(u)))
 279                         goto oom;
 280
 281                 if (!dbus_message_append_args(
 282                                     reply,
 283                                     DBUS_TYPE_OBJECT_PATH, &path,
 284                                     DBUS_TYPE_INVALID))
 285                         goto oom;
 286
 287         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StartUnit"))
 288                 job_type = JOB_START;
 289         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "StopUnit"))
 290                 job_type = JOB_STOP;
 291         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ReloadUnit"))
 292                 job_type = JOB_RELOAD;
 293         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "RestartUnit"))
 294                 job_type = JOB_RESTART;
 295         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "TryRestartUnit"))
 296                 job_type = JOB_TRY_RESTART;
 297         else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "GetJob")) {
 298                 uint32_t id;
 299                 Job *j;
 300
 301                 if (!dbus_message_get_args(
 302                                     message,
 303                                     &error,
 304                                     DBUS_TYPE_UINT32, &id,
 305                                     DBUS_TYPE_INVALID))
 306                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 307
 308                 if (!(j = manager_get_job(m, id)))
 309                         return bus_send_error_reply(m, connection, message, NULL, -ENOENT);
 310
 311                 if (!(reply = dbus_message_new_method_return(message)))
 312                         goto oom;
 313
 314                 if (!(path = job_dbus_path(j)))
 315                         goto oom;
 316
 317                 if (!dbus_message_append_args(
 318                                     reply,
 319                                     DBUS_TYPE_OBJECT_PATH, &path,
 320                                     DBUS_TYPE_INVALID))
 321                         goto oom;
 322
 323         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ClearJobs")) {
 324
 325                 manager_clear_jobs(m);
 326
 327                 if (!(reply = dbus_message_new_method_return(message)))
 328                         goto oom;
 329
 330         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListUnits")) {
 331                 DBusMessageIter iter, sub;
 332                 Iterator i;
 333                 Unit *u;
 334                 const char *k;
 335
 336                 if (!(reply = dbus_message_new_method_return(message)))
 337                         goto oom;
 338
 339                 dbus_message_iter_init_append(reply, &iter);
 340
 341                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(sssssouso)", &sub))
 342                         goto oom;
 343
 344                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 345                         char *u_path, *j_path;
 346                         const char *description, *load_state, *active_state, *sub_state, *sjob_type;
 347                         DBusMessageIter sub2;
 348                         uint32_t job_id;
 349
 350                         if (k != u->meta.id)
 351                                 continue;
 352
 353                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 354                                 goto oom;
 355
 356                         description = unit_description(u);
 357                         load_state = unit_load_state_to_string(u->meta.load_state);
 358                         active_state = unit_active_state_to_string(unit_active_state(u));
 359                         sub_state = unit_sub_state_to_string(u);
 360
 361                         if (!(u_path = unit_dbus_path(u)))
 362                                 goto oom;
 363
 364                         if (u->meta.job) {
 365                                 job_id = (uint32_t) u->meta.job->id;
 366
 367                                 if (!(j_path = job_dbus_path(u->meta.job))) {
 368                                         free(u_path);
 369                                         goto oom;
 370                                 }
 371
 372                                 sjob_type = job_type_to_string(u->meta.job->type);
 373                         } else {
 374                                 job_id = 0;
 375                                 j_path = u_path;
 376                                 sjob_type = "";
 377                         }
 378
 379                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &u->meta.id) ||
 380                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
 381                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
 382                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
 383                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sub_state) ||
 384                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
 385                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
 386                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &sjob_type) ||
 387                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
 388                                 free(u_path);
 389                                 if (u->meta.job)
 390                                         free(j_path);
 391                                 goto oom;
 392                         }
 393
 394                         free(u_path);
 395                         if (u->meta.job)
 396                                 free(j_path);
 397
 398                         if (!dbus_message_iter_close_container(&sub, &sub2))
 399                                 goto oom;
 400                 }
 401
 402                 if (!dbus_message_iter_close_container(&iter, &sub))
 403                         goto oom;
 404
 405         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "ListJobs")) {
 406                 DBusMessageIter iter, sub;
 407                 Iterator i;
 408                 Job *j;
 409
 410                 if (!(reply = dbus_message_new_method_return(message)))
 411                         goto oom;
 412
 413                 dbus_message_iter_init_append(reply, &iter);
 414
 415                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
 416                         goto oom;
 417
 418                 HASHMAP_FOREACH(j, m->jobs, i) {
 419                         char *u_path, *j_path;
 420                         const char *state, *type;
 421                         uint32_t id;
 422                         DBusMessageIter sub2;
 423
 424                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 425                                 goto oom;
 426
 427                         id = (uint32_t) j->id;
 428                         state = job_state_to_string(j->state);
 429                         type = job_type_to_string(j->type);
 430
 431                         if (!(j_path = job_dbus_path(j)))
 432                                 goto oom;
 433
 434                         if (!(u_path = unit_dbus_path(j->unit))) {
 435                                 free(j_path);
 436                                 goto oom;
 437                         }
 438
 439                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
 440                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &j->unit->meta.id) ||
 441                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
 442                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
 443                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
 444                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
 445                                 free(j_path);
 446                                 free(u_path);
 447                                 goto oom;
 448                         }
 449
 450                         free(j_path);
 451                         free(u_path);
 452
 453                         if (!dbus_message_iter_close_container(&sub, &sub2))
 454                                 goto oom;
 455                 }
 456
 457                 if (!dbus_message_iter_close_container(&iter, &sub))
 458                         goto oom;
 459
 460         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Subscribe")) {
 461                 char *client;
 462                 Set *s;
 463
 464                 if (!(s = BUS_CONNECTION_SUBSCRIBED(m, connection))) {
 465                         if (!(s = set_new(string_hash_func, string_compare_func)))
 466                                 goto oom;
 467
 468                         if (!(dbus_connection_set_data(connection, m->subscribed_data_slot, s, NULL))) {
 469                                 set_free(s);
 470                                 goto oom;
 471                         }
 472                 }
 473
 474                 if (!(client = strdup(dbus_message_get_sender(message))))
 475                         goto oom;
 476
 477                 if ((r = set_put(s, client)) < 0) {
 478                         free(client);
 479                         return bus_send_error_reply(m, connection, message, NULL, r);
 480                 }
 481
 482                 if (!(reply = dbus_message_new_method_return(message)))
 483                         goto oom;
 484
 485         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Unsubscribe")) {
 486                 char *client;
 487
 488                 if (!(client = set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) dbus_message_get_sender(message))))
 489                         return bus_send_error_reply(m, connection, message, NULL, -ENOENT);
 490
 491                 free(client);
 492
 493                 if (!(reply = dbus_message_new_method_return(message)))
 494                         goto oom;
 495
 496         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Dump")) {
 497                 FILE *f;
 498                 char *dump = NULL;
 499                 size_t size;
 500
 501                 if (!(reply = dbus_message_new_method_return(message)))
 502                         goto oom;
 503
 504                 if (!(f = open_memstream(&dump, &size)))
 505                         goto oom;
 506
 507                 manager_dump_units(m, f, NULL);
 508                 manager_dump_jobs(m, f, NULL);
 509
 510                 if (ferror(f)) {
 511                         fclose(f);
 512                         free(dump);
 513                         goto oom;
 514                 }
 515
 516                 fclose(f);
 517
 518                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
 519                         free(dump);
 520                         goto oom;
 521                 }
 522
 523                 free(dump);
 524         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "CreateSnapshot")) {
 525                 const char *name;
 526                 dbus_bool_t cleanup;
 527                 Snapshot *s;
 528
 529                 if (!dbus_message_get_args(
 530                                     message,
 531                                     &error,
 532                                     DBUS_TYPE_STRING, &name,
 533                                     DBUS_TYPE_BOOLEAN, &cleanup,
 534                                     DBUS_TYPE_INVALID))
 535                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 536
 537                 if (name && name[0] == 0)
 538                         name = NULL;
 539
 540                 if ((r = snapshot_create(m, name, cleanup, &s)) < 0)
 541                         return bus_send_error_reply(m, connection, message, NULL, r);
 542
 543                 if (!(reply = dbus_message_new_method_return(message)))
 544                         goto oom;
 545
 546                 if (!(path = unit_dbus_path(UNIT(s))))
 547                         goto oom;
 548
 549                 if (!dbus_message_append_args(
 550                                     reply,
 551                                     DBUS_TYPE_OBJECT_PATH, &path,
 552                                     DBUS_TYPE_INVALID))
 553                         goto oom;
 554
 555         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
 556                 char *introspection = NULL;
 557                 FILE *f;
 558                 Iterator i;
 559                 Unit *u;
 560                 Job *j;
 561                 const char *k;
 562                 size_t size;
 563
 564                 if (!(reply = dbus_message_new_method_return(message)))
 565                         goto oom;
 566
 567                 /* We roll our own introspection code here, instead of
 568                  * relying on bus_default_message_handler() because we
 569                  * need to generate our introspection string
 570                  * dynamically. */
 571
 572                 if (!(f = open_memstream(&introspection, &size)))
 573                         goto oom;
 574
 575                 fputs(INTROSPECTION_BEGIN, f);
 576
 577                 HASHMAP_FOREACH_KEY(u, k, m->units, i) {
 578                         char *p;
 579
 580                         if (k != u->meta.id)
 581                                 continue;
 582
 583                         if (!(p = bus_path_escape(k))) {
 584                                 fclose(f);
 585                                 free(introspection);
 586                                 goto oom;
 587                         }
 588
 589                         fprintf(f, "<node name=\"unit/%s\"/>", p);
 590                         free(p);
 591                 }
 592
 593                 HASHMAP_FOREACH(j, m->jobs, i)
 594                         fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
 595
 596                 fputs(INTROSPECTION_END, f);
 597
 598                 if (ferror(f)) {
 599                         fclose(f);
 600                         free(introspection);
 601                         goto oom;
 602                 }
 603
 604                 fclose(f);
 605
 606                 if (!introspection)
 607                         goto oom;
 608
 609                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
 610                         free(introspection);
 611                         goto oom;
 612                 }
 613
 614                 free(introspection);
 615
 616         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reload")) {
 617
 618                 assert(!m->queued_message);
 619
 620                 /* Instead of sending the reply back right away, we
 621                  * just remember that we need to and then send it
 622                  * after the reload is finished. That way the caller
 623                  * knows when the reload finished. */
 624
 625                 if (!(m->queued_message = dbus_message_new_method_return(message)))
 626                         goto oom;
 627
 628                 m->exit_code = MANAGER_RELOAD;
 629
 630         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Reexecute")) {
 631
 632                 if (!(reply = dbus_message_new_method_return(message)))
 633                         goto oom;
 634
 635                 m->exit_code = MANAGER_REEXECUTE;
 636
 637         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "Exit")) {
 638
 639                 if (m->running_as == MANAGER_SYSTEM)
 640                         return bus_send_error_reply(m, connection, message, NULL, -ENOTSUP);
 641
 642                 if (!(reply = dbus_message_new_method_return(message)))
 643                         goto oom;
 644
 645                 m->exit_code = MANAGER_EXIT;
 646
 647         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "SetEnvironment")) {
 648                 char **l = NULL, **e = NULL;
 649
 650                 if ((r = bus_parse_strv(message, &l)) < 0) {
 651                         if (r == -ENOMEM)
 652                                 goto oom;
 653
 654                         return bus_send_error_reply(m, connection, message, NULL, r);
 655                 }
 656
 657                 e = strv_env_merge(2, m->environment, l);
 658                 strv_free(l);
 659
 660                 if (!e)
 661                         goto oom;
 662
 663                 if (!(reply = dbus_message_new_method_return(message))) {
 664                         strv_free(e);
 665                         goto oom;
 666                 }
 667
 668                 strv_free(m->environment);
 669                 m->environment = e;
 670
 671         } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Manager", "UnsetEnvironment")) {
 672                 char **l = NULL, **e = NULL;
 673
 674                 if ((r = bus_parse_strv(message, &l)) < 0) {
 675                         if (r == -ENOMEM)
 676                                 goto oom;
 677
 678                         return bus_send_error_reply(m, connection, message, NULL, r);
 679                 }
 680
 681                 e = strv_env_delete(m->environment, 1, l);
 682                 strv_free(l);
 683
 684                 if (!e)
 685                         goto oom;
 686
 687                 if (!(reply = dbus_message_new_method_return(message)))
 688                         goto oom;
 689
 690                 strv_free(m->environment);
 691                 m->environment = e;
 692
 693         } else
 694                 return bus_default_message_handler(m, connection, message, NULL, properties);
 695
 696
 697         if (job_type != _JOB_TYPE_INVALID) {
 698                 const char *name, *smode;
 699                 JobMode mode;
 700                 Job *j;
 701                 Unit *u;
 702
 703                 if (!dbus_message_get_args(
 704                                     message,
 705                                     &error,
 706                                     DBUS_TYPE_STRING, &name,
 707                                     DBUS_TYPE_STRING, &smode,
 708                                     DBUS_TYPE_INVALID))
 709                         return bus_send_error_reply(m, connection, message, &error, -EINVAL);
 710
 711                 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID)
 712                         return bus_send_error_reply(m, connection, message, NULL, -EINVAL);
 713
 714                 if ((r = manager_load_unit(m, name, NULL, &u)) < 0)
 715                         return bus_send_error_reply(m, connection, message, NULL, r);
 716
 717                 if (job_type == JOB_START && u->meta.only_by_dependency)
 718                         return bus_send_error_reply(m, connection, message, NULL, -EPERM);
 719
 720                 if ((r = manager_add_job(m, job_type, u, mode, true, &j)) < 0)
 721                         return bus_send_error_reply(m, connection, message, NULL, r);
 722
 723                 if (!(j->bus_client = strdup(dbus_message_get_sender(message))))
 724                         goto oom;
 725
 726                 j->bus = connection;
 727
 728                 if (!(reply = dbus_message_new_method_return(message)))
 729                         goto oom;
 730
 731                 if (!(path = job_dbus_path(j)))
 732                         goto oom;
 733
 734                 if (!dbus_message_append_args(
 735                                     reply,
 736                                     DBUS_TYPE_OBJECT_PATH, &path,
 737                                     DBUS_TYPE_INVALID))
 738                         goto oom;
 739
 740         }
 741
 742         free(path);
 743
 744         if (reply) {
 745                 if (!dbus_connection_send(connection, reply, NULL))
 746                         goto oom;
 747
 748                 dbus_message_unref(reply);
 749         }
 750
 751         return DBUS_HANDLER_RESULT_HANDLED;
 752
 753 oom:
 754         free(path);
 755
 756         if (reply)
 757                 dbus_message_unref(reply);
 758
 759         dbus_error_free(&error);
 760
 761         return DBUS_HANDLER_RESULT_NEED_MEMORY;
 762 }
 763
 764 const DBusObjectPathVTable bus_manager_vtable = {
 765         .message_function = bus_manager_message_handler
 766 };