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