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_dependencies(Manager *m, DBusMessageIter *i, const char *property, void *data) {
53 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
57 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &u->meta.id))
60 if (!dbus_message_iter_close_container(i, &sub))
66 int bus_unit_append_description(Manager *m, DBusMessageIter *i, const char *property, void *data) {
75 d = unit_description(u);
77 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
83 DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState);
85 int bus_unit_append_active_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
94 state = unit_active_state_to_string(unit_active_state(u));
96 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
102 int bus_unit_append_sub_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
111 state = unit_sub_state_to_string(u);
113 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
119 int bus_unit_append_can_start(Manager *m, DBusMessageIter *i, const char *property, void *data) {
128 b = unit_can_start(u);
130 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
136 int bus_unit_append_can_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) {
145 b = unit_can_reload(u);
147 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
153 int bus_unit_append_job(Manager *m, DBusMessageIter *i, const char *property, void *data) {
163 if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
168 if (!(p = job_dbus_path(u->meta.job)))
171 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) ||
172 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
179 /* No job, so let's fill in some placeholder
180 * data. Since we need to fill in a valid path we
181 * simple point to ourselves. */
183 if (!(p = unit_dbus_path(u)))
186 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) ||
187 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
195 if (!dbus_message_iter_close_container(i, &sub))
201 int bus_unit_append_default_cgroup(Manager *m, DBusMessageIter *i, const char *property, void *data) {
212 if ((cgb = unit_get_default_cgroup(u))) {
213 if (!(t = cgroup_bonding_to_string(cgb)))
218 success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
223 return success ? 0 : -ENOMEM;
226 int bus_unit_append_cgroups(Manager *m, DBusMessageIter *i, const char *property, void *data) {
231 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
234 LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) {
238 if (!(t = cgroup_bonding_to_string(cgb)))
241 success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
248 if (!dbus_message_iter_close_container(i, &sub))
254 DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_kill_mode, kill_mode, KillMode);
256 static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusMessage *message) {
257 DBusMessage *reply = NULL;
258 Manager *m = u->meta.manager;
260 JobType job_type = _JOB_TYPE_INVALID;
262 dbus_error_init(&error);
264 if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start"))
265 job_type = JOB_START;
266 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop"))
268 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload"))
269 job_type = JOB_RELOAD;
270 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart"))
271 job_type = JOB_RESTART;
272 else if (UNIT_VTABLE(u)->bus_message_handler)
273 return UNIT_VTABLE(u)->bus_message_handler(u, message);
275 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
277 if (job_type != _JOB_TYPE_INVALID) {
284 if (!dbus_message_get_args(
287 DBUS_TYPE_STRING, &smode,
289 return bus_send_error_reply(m, message, &error, -EINVAL);
291 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID)
292 return bus_send_error_reply(m, message, NULL, -EINVAL);
294 if ((r = manager_add_job(m, job_type, u, mode, true, &j)) < 0)
295 return bus_send_error_reply(m, message, NULL, r);
297 if (!(reply = dbus_message_new_method_return(message)))
300 if (!(path = job_dbus_path(j)))
303 if (!dbus_message_append_args(
305 DBUS_TYPE_OBJECT_PATH, &path,
311 if (!dbus_connection_send(m->api_bus, reply, NULL))
314 dbus_message_unref(reply);
317 return DBUS_HANDLER_RESULT_HANDLED;
321 dbus_message_unref(reply);
323 dbus_error_free(&error);
325 return DBUS_HANDLER_RESULT_NEED_MEMORY;
328 static DBusHandlerResult bus_unit_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
337 log_debug("Got D-Bus request: %s.%s() on %s",
338 dbus_message_get_interface(message),
339 dbus_message_get_member(message),
340 dbus_message_get_path(message));
342 if ((r = manager_get_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 0) {
345 return DBUS_HANDLER_RESULT_NEED_MEMORY;
348 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
350 return bus_send_error_reply(m, message, NULL, r);
353 return bus_unit_message_dispatch(u, message);
356 const DBusObjectPathVTable bus_unit_vtable = {
357 .message_function = bus_unit_message_handler
360 void bus_unit_send_change_signal(Unit *u) {
362 DBusMessage *m = NULL;
365 assert(u->meta.in_dbus_queue);
367 LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
368 u->meta.in_dbus_queue = false;
370 if (set_isempty(u->meta.manager->subscribed)) {
371 u->meta.sent_dbus_new_signal = true;
375 if (!(p = unit_dbus_path(u)))
378 if (u->meta.sent_dbus_new_signal) {
379 /* Send a change signal */
381 if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed")))
384 /* Send a new signal */
386 if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew")))
389 if (!dbus_message_append_args(m,
390 DBUS_TYPE_STRING, &u->meta.id,
391 DBUS_TYPE_OBJECT_PATH, &p,
396 if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL))
400 dbus_message_unref(m);
402 u->meta.sent_dbus_new_signal = true;
410 dbus_message_unref(m);
412 log_error("Failed to allocate unit change/new signal.");
415 void bus_unit_send_removed_signal(Unit *u) {
417 DBusMessage *m = NULL;
421 if (set_isempty(u->meta.manager->subscribed) || !u->meta.sent_dbus_new_signal)
424 if (!(p = unit_dbus_path(u)))
427 if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved")))
430 if (!dbus_message_append_args(m,
431 DBUS_TYPE_STRING, &u->meta.id,
432 DBUS_TYPE_OBJECT_PATH, &p,
436 if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL))
440 dbus_message_unref(m);
448 dbus_message_unref(m);
450 log_error("Failed to allocate unit remove signal.");