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"
28 int bus_unit_append_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
34 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
37 SET_FOREACH(t, u->meta.names, j)
38 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t))
41 if (!dbus_message_iter_close_container(i, &sub))
47 int bus_unit_append_description(Manager *m, DBusMessageIter *i, const char *property, void *data) {
56 d = unit_description(u);
58 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
64 DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState);
66 int bus_unit_append_active_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
75 state = unit_active_state_to_string(unit_active_state(u));
77 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
83 int bus_unit_append_sub_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
92 state = unit_sub_state_to_string(u);
94 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
100 int bus_unit_append_can_start(Manager *m, DBusMessageIter *i, const char *property, void *data) {
109 b = unit_can_start(u);
111 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
117 int bus_unit_append_can_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) {
126 b = unit_can_reload(u);
128 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
134 int bus_unit_append_job(Manager *m, DBusMessageIter *i, const char *property, void *data) {
144 if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
149 if (!(p = job_dbus_path(u->meta.job)))
152 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) ||
153 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
160 /* No job, so let's fill in some placeholder
161 * data. Since we need to fill in a valid path we
162 * simple point to ourselves. */
164 if (!(p = unit_dbus_path(u)))
167 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) ||
168 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
176 if (!dbus_message_iter_close_container(i, &sub))
182 int bus_unit_append_default_cgroup(Manager *m, DBusMessageIter *i, const char *property, void *data) {
193 if ((cgb = unit_get_default_cgroup(u))) {
194 if (!(t = cgroup_bonding_to_string(cgb)))
199 success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
204 return success ? 0 : -ENOMEM;
207 int bus_unit_append_cgroups(Manager *m, DBusMessageIter *i, const char *property, void *data) {
212 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
215 LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) {
219 if (!(t = cgroup_bonding_to_string(cgb)))
222 success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
229 if (!dbus_message_iter_close_container(i, &sub))
235 DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_kill_mode, kill_mode, KillMode);
237 static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusMessage *message) {
238 DBusMessage *reply = NULL;
239 Manager *m = u->meta.manager;
241 JobType job_type = _JOB_TYPE_INVALID;
243 dbus_error_init(&error);
245 if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start"))
246 job_type = JOB_START;
247 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop"))
249 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload"))
250 job_type = JOB_RELOAD;
251 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart"))
252 job_type = JOB_RESTART;
253 else if (UNIT_VTABLE(u)->bus_message_handler)
254 return UNIT_VTABLE(u)->bus_message_handler(u, message);
256 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
258 if (job_type != _JOB_TYPE_INVALID) {
265 if (!dbus_message_get_args(
268 DBUS_TYPE_STRING, &smode,
270 return bus_send_error_reply(m, message, &error, -EINVAL);
272 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID)
273 return bus_send_error_reply(m, message, NULL, -EINVAL);
275 if ((r = manager_add_job(m, job_type, u, mode, true, &j)) < 0)
276 return bus_send_error_reply(m, message, NULL, r);
278 if (!(reply = dbus_message_new_method_return(message)))
281 if (!(path = job_dbus_path(j)))
284 if (!dbus_message_append_args(
286 DBUS_TYPE_OBJECT_PATH, &path,
292 if (!dbus_connection_send(m->api_bus, reply, NULL))
295 dbus_message_unref(reply);
298 return DBUS_HANDLER_RESULT_HANDLED;
302 dbus_message_unref(reply);
304 dbus_error_free(&error);
306 return DBUS_HANDLER_RESULT_NEED_MEMORY;
309 static DBusHandlerResult bus_unit_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
318 log_debug("Got D-Bus request: %s.%s() on %s",
319 dbus_message_get_interface(message),
320 dbus_message_get_member(message),
321 dbus_message_get_path(message));
323 if ((r = manager_get_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 0) {
326 return DBUS_HANDLER_RESULT_NEED_MEMORY;
329 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
331 return bus_send_error_reply(m, message, NULL, r);
334 return bus_unit_message_dispatch(u, message);
337 const DBusObjectPathVTable bus_unit_vtable = {
338 .message_function = bus_unit_message_handler
341 void bus_unit_send_change_signal(Unit *u) {
343 DBusMessage *m = NULL;
346 assert(u->meta.in_dbus_queue);
348 LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
349 u->meta.in_dbus_queue = false;
351 if (set_isempty(u->meta.manager->subscribed))
354 if (!(p = unit_dbus_path(u)))
357 if (u->meta.sent_dbus_new_signal) {
358 /* Send a change signal */
360 if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed")))
363 /* Send a new signal */
365 if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1", "UnitNew")))
368 if (!dbus_message_append_args(m,
369 DBUS_TYPE_STRING, &u->meta.id,
370 DBUS_TYPE_OBJECT_PATH, &p,
375 if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL))
379 dbus_message_unref(m);
381 u->meta.sent_dbus_new_signal = true;
389 dbus_message_unref(m);
391 log_error("Failed to allocate unit change/new signal.");
394 void bus_unit_send_removed_signal(Unit *u) {
396 DBusMessage *m = NULL;
400 if (set_isempty(u->meta.manager->subscribed) || !u->meta.sent_dbus_new_signal)
403 if (!(p = unit_dbus_path(u)))
406 if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1", "UnitRemoved")))
409 if (!dbus_message_append_args(m,
410 DBUS_TYPE_STRING, &u->meta.id,
411 DBUS_TYPE_OBJECT_PATH, &p,
415 if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL))
419 dbus_message_unref(m);
427 dbus_message_unref(m);
429 log_error("Failed to allocate unit remove signal.");