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 const char bus_unit_interface[] = BUS_UNIT_INTERFACE;
30 int bus_unit_append_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
36 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
39 SET_FOREACH(t, u->meta.names, j)
40 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t))
43 if (!dbus_message_iter_close_container(i, &sub))
49 int bus_unit_append_dependencies(Manager *m, DBusMessageIter *i, const char *property, void *data) {
55 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
59 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &u->meta.id))
62 if (!dbus_message_iter_close_container(i, &sub))
68 int bus_unit_append_description(Manager *m, DBusMessageIter *i, const char *property, void *data) {
77 d = unit_description(u);
79 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
85 DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState);
87 int bus_unit_append_active_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
96 state = unit_active_state_to_string(unit_active_state(u));
98 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
104 int bus_unit_append_sub_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
113 state = unit_sub_state_to_string(u);
115 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
121 int bus_unit_append_can_start(Manager *m, DBusMessageIter *i, const char *property, void *data) {
130 b = unit_can_start(u);
132 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
138 int bus_unit_append_can_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) {
147 b = unit_can_reload(u);
149 if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
155 int bus_unit_append_job(Manager *m, DBusMessageIter *i, const char *property, void *data) {
165 if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
170 if (!(p = job_dbus_path(u->meta.job)))
173 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) ||
174 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
181 /* No job, so let's fill in some placeholder
182 * data. Since we need to fill in a valid path we
183 * simple point to ourselves. */
185 if (!(p = unit_dbus_path(u)))
188 if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) ||
189 !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
197 if (!dbus_message_iter_close_container(i, &sub))
203 int bus_unit_append_default_cgroup(Manager *m, DBusMessageIter *i, const char *property, void *data) {
214 if ((cgb = unit_get_default_cgroup(u))) {
215 if (!(t = cgroup_bonding_to_string(cgb)))
220 success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
225 return success ? 0 : -ENOMEM;
228 int bus_unit_append_cgroups(Manager *m, DBusMessageIter *i, const char *property, void *data) {
233 if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
236 LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) {
240 if (!(t = cgroup_bonding_to_string(cgb)))
243 success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
250 if (!dbus_message_iter_close_container(i, &sub))
256 DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_kill_mode, kill_mode, KillMode);
258 static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusMessage *message) {
259 DBusMessage *reply = NULL;
260 Manager *m = u->meta.manager;
262 JobType job_type = _JOB_TYPE_INVALID;
265 dbus_error_init(&error);
267 if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start"))
268 job_type = JOB_START;
269 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop"))
271 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload"))
272 job_type = JOB_RELOAD;
273 else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart"))
274 job_type = JOB_RESTART;
275 else if (UNIT_VTABLE(u)->bus_message_handler)
276 return UNIT_VTABLE(u)->bus_message_handler(u, message);
278 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
280 if (job_type != _JOB_TYPE_INVALID) {
286 if (job_type == JOB_START && u->meta.only_by_dependency)
287 return bus_send_error_reply(m, message, NULL, -EPERM);
289 if (!dbus_message_get_args(
292 DBUS_TYPE_STRING, &smode,
294 return bus_send_error_reply(m, message, &error, -EINVAL);
296 if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID)
297 return bus_send_error_reply(m, message, NULL, -EINVAL);
299 if ((r = manager_add_job(m, job_type, u, mode, true, &j)) < 0)
300 return bus_send_error_reply(m, message, NULL, r);
302 if (!(reply = dbus_message_new_method_return(message)))
305 if (!(path = job_dbus_path(j)))
308 if (!dbus_message_append_args(
310 DBUS_TYPE_OBJECT_PATH, &path,
318 if (!dbus_connection_send(m->api_bus, reply, NULL))
321 dbus_message_unref(reply);
324 return DBUS_HANDLER_RESULT_HANDLED;
330 dbus_message_unref(reply);
332 dbus_error_free(&error);
334 return DBUS_HANDLER_RESULT_NEED_MEMORY;
337 static DBusHandlerResult bus_unit_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
346 log_debug("Got D-Bus request: %s.%s() on %s",
347 dbus_message_get_interface(message),
348 dbus_message_get_member(message),
349 dbus_message_get_path(message));
351 if ((r = manager_get_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 0) {
354 return DBUS_HANDLER_RESULT_NEED_MEMORY;
357 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
359 return bus_send_error_reply(m, message, NULL, r);
362 return bus_unit_message_dispatch(u, message);
365 const DBusObjectPathVTable bus_unit_vtable = {
366 .message_function = bus_unit_message_handler
369 void bus_unit_send_change_signal(Unit *u) {
371 DBusMessage *m = NULL;
374 assert(u->meta.in_dbus_queue);
376 LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
377 u->meta.in_dbus_queue = false;
379 if (set_isempty(u->meta.manager->subscribed)) {
380 u->meta.sent_dbus_new_signal = true;
384 if (!(p = unit_dbus_path(u)))
387 if (u->meta.sent_dbus_new_signal) {
388 /* Send a change signal */
390 if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed")))
393 /* Send a new signal */
395 if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew")))
398 if (!dbus_message_append_args(m,
399 DBUS_TYPE_STRING, &u->meta.id,
400 DBUS_TYPE_OBJECT_PATH, &p,
405 if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL))
409 dbus_message_unref(m);
411 u->meta.sent_dbus_new_signal = true;
419 dbus_message_unref(m);
421 log_error("Failed to allocate unit change/new signal.");
424 void bus_unit_send_removed_signal(Unit *u) {
426 DBusMessage *m = NULL;
430 if (set_isempty(u->meta.manager->subscribed))
433 if (!u->meta.sent_dbus_new_signal)
434 bus_unit_send_change_signal(u);
436 if (!(p = unit_dbus_path(u)))
439 if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved")))
442 if (!dbus_message_append_args(m,
443 DBUS_TYPE_STRING, &u->meta.id,
444 DBUS_TYPE_OBJECT_PATH, &p,
448 if (!dbus_connection_send(u->meta.manager->api_bus, m, NULL))
452 dbus_message_unref(m);
460 dbus_message_unref(m);
462 log_error("Failed to allocate unit remove signal.");