1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
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.
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.
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/>.
26 #include "dbus-unit.h"
27 #include "bus-errors.h"
29 const char bus_unit_interface[] = BUS_UNIT_INTERFACE;
31 int bus_unit_append_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
37 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
40 SET_FOREACH(t, u->meta.names, j)
41 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t))
44 if (!dbus_message_iter_close_container(i, &sub))
50 int bus_unit_append_dependencies(Manager *m, DBusMessageIter *i, const char *property, void *data) {
56 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
60 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &u->meta.id))
63 if (!dbus_message_iter_close_container(i, &sub))
69 int bus_unit_append_description(Manager *m, DBusMessageIter *i, const char *property, void *data) {
78 d = unit_description(u);
80 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
86 DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState);
88 int bus_unit_append_active_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
97 state = unit_active_state_to_string(unit_active_state(u));
99 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
105 int bus_unit_append_sub_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
114 state = unit_sub_state_to_string(u);
116 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
122 int bus_unit_append_can_start(Manager *m, DBusMessageIter *i, const char *property, void *data) {
131 b = unit_can_start(u);
133 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
139 int bus_unit_append_can_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) {
148 b = unit_can_reload(u);
150 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
156 int bus_unit_append_job(Manager *m, DBusMessageIter *i, const char *property, void *data) {
166 if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
171 if (!(p = job_dbus_path(u->meta.job)))
174 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) ||
175 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
182 /* No job, so let's fill in some placeholder
183 * data. Since we need to fill in a valid path we
184 * simple point to ourselves. */
186 if (!(p = unit_dbus_path(u)))
189 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) ||
190 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
198 if (!dbus_message_iter_close_container(i, &sub))
204 int bus_unit_append_default_cgroup(Manager *m, DBusMessageIter *i, const char *property, void *data) {
215 if ((cgb = unit_get_default_cgroup(u))) {
216 if (!(t = cgroup_bonding_to_string(cgb)))
221 success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
226 return success ? 0 : -ENOMEM;
229 int bus_unit_append_cgroups(Manager *m, DBusMessageIter *i, const char *property, void *data) {
234 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
237 LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) {
241 if (!(t = cgroup_bonding_to_string(cgb)))
244 success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
251 if (!dbus_message_iter_close_container(i, &sub))
257 int bus_unit_append_need_daemon_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) {
266 b = unit_need_daemon_reload(u);
268 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
274 static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusConnection *connection, DBusMessage *message) {
275 DBusMessage *reply = NULL;
276 Manager *m = u->meta.manager;
278 JobType job_type = _JOB_TYPE_INVALID;
280 bool reload_if_possible = false;
282 dbus_error_init(&error);
284 if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start"))
285 job_type = JOB_START;
286 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop"))
288 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload"))
289 job_type = JOB_RELOAD;
290 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart"))
291 job_type = JOB_RESTART;
292 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "TryRestart"))
293 job_type = JOB_TRY_RESTART;
294 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrRestart")) {
295 reload_if_possible = true;
296 job_type = JOB_RESTART;
297 } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrTryRestart")) {
298 reload_if_possible = true;
299 job_type = JOB_TRY_RESTART;
300 } else if (UNIT_VTABLE(u)->bus_message_handler)
301 return UNIT_VTABLE(u)->bus_message_handler(u, connection, message);
303 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
305 if (job_type != _JOB_TYPE_INVALID) {
311 if (job_type == JOB_START && u->meta.only_by_dependency) {
312 dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Unit may be activated by dependency only.");
313 return bus_send_error_reply(m, connection, message, &error, -EPERM);
316 if (!dbus_message_get_args(
319 DBUS_TYPE_STRING, &smode,
321 return bus_send_error_reply(m, connection, message, &error, -EINVAL);
323 if (reload_if_possible && unit_can_reload(u)) {
324 if (job_type == JOB_RESTART)
325 job_type = JOB_RELOAD_OR_START;
326 else if (job_type == JOB_TRY_RESTART)
327 job_type = JOB_RELOAD;
330 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
331 dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
332 return bus_send_error_reply(m, connection, message, &error, -EINVAL);
335 if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
336 return bus_send_error_reply(m, connection, message, &error, r);
338 if (!(reply = dbus_message_new_method_return(message)))
341 if (!(path = job_dbus_path(j)))
344 if (!dbus_message_append_args(
346 DBUS_TYPE_OBJECT_PATH, &path,
354 if (!dbus_connection_send(connection, reply, NULL))
357 dbus_message_unref(reply);
360 return DBUS_HANDLER_RESULT_HANDLED;
366 dbus_message_unref(reply);
368 dbus_error_free(&error);
370 return DBUS_HANDLER_RESULT_NEED_MEMORY;
373 static DBusHandlerResult bus_unit_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
382 if ((r = manager_get_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 0) {
385 return DBUS_HANDLER_RESULT_NEED_MEMORY;
388 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
390 return bus_send_error_reply(m, connection, message, NULL, r);
393 return bus_unit_message_dispatch(u, connection, message);
396 const DBusObjectPathVTable bus_unit_vtable = {
397 .message_function = bus_unit_message_handler
400 void bus_unit_send_change_signal(Unit *u) {
402 DBusMessage *m = NULL;
406 if (u->meta.in_dbus_queue) {
407 LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
408 u->meta.in_dbus_queue = false;
411 if (!bus_has_subscriber(u->meta.manager)) {
412 u->meta.sent_dbus_new_signal = true;
416 if (!(p = unit_dbus_path(u)))
419 if (u->meta.sent_dbus_new_signal) {
420 /* Send a change signal */
422 if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed")))
425 /* Send a new signal */
427 if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew")))
430 if (!dbus_message_append_args(m,
431 DBUS_TYPE_STRING, &u->meta.id,
432 DBUS_TYPE_OBJECT_PATH, &p,
437 if (bus_broadcast(u->meta.manager, m) < 0)
441 dbus_message_unref(m);
443 u->meta.sent_dbus_new_signal = true;
451 dbus_message_unref(m);
453 log_error("Failed to allocate unit change/new signal.");
456 void bus_unit_send_removed_signal(Unit *u) {
458 DBusMessage *m = NULL;
462 if (!bus_has_subscriber(u->meta.manager))
465 if (!u->meta.sent_dbus_new_signal)
466 bus_unit_send_change_signal(u);
468 if (!(p = unit_dbus_path(u)))
471 if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved")))
474 if (!dbus_message_append_args(m,
475 DBUS_TYPE_STRING, &u->meta.id,
476 DBUS_TYPE_OBJECT_PATH, &p,
480 if (bus_broadcast(u->meta.manager, m) < 0)
484 dbus_message_unref(m);
492 dbus_message_unref(m);
494 log_error("Failed to allocate unit remove signal.");