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|
/*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include "dbus.h"
#include "log.h"
static const char introspection[] =
DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
"<node>"
" <interface name=\"org.freedesktop.systemd1.Job\">"
" <method name=\"Cancel\"/>"
" <signal name=\"Changed\"/>"
" <property name=\"Id\" type=\"u\" access=\"read\"/>"
" <property name=\"Unit\" type=\"(so)\" access=\"read\"/>"
" <property name=\"JobType\" type=\"s\" access=\"read\"/>"
" <property name=\"State\" type=\"s\" access=\"read\"/>"
" </interface>"
BUS_PROPERTIES_INTERFACE
BUS_INTROSPECTABLE_INTERFACE
"</node>";
static int bus_job_append_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
Job *j = data;
const char *state;
assert(m);
assert(i);
assert(property);
assert(j);
state = job_state_to_string(j->state);
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
return -ENOMEM;
return 0;
}
static int bus_job_append_type(Manager *m, DBusMessageIter *i, const char *property, void *data) {
Job *j = data;
const char *type;
assert(m);
assert(i);
assert(property);
assert(j);
type = job_type_to_string(j->type);
if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &type))
return -ENOMEM;
return 0;
}
static int bus_job_append_unit(Manager *m, DBusMessageIter *i, const char *property, void *data) {
Job *j = data;
DBusMessageIter sub;
char *p;
const char *id;
assert(m);
assert(i);
assert(property);
assert(j);
if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
return -ENOMEM;
if (!(p = unit_dbus_path(j->unit)))
return -ENOMEM;
id = unit_id(j->unit);
if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &id) ||
!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
free(p);
return -ENOMEM;
}
free(p);
if (!dbus_message_iter_close_container(i, &sub))
return -ENOMEM;
return 0;
}
static DBusHandlerResult bus_job_message_dispatch(Job *j, DBusMessage *message) {
const BusProperty properties[] = {
{ "org.freedesktop.systemd1.Job", "Id", bus_property_append_uint32, "u", &j->id },
{ "org.freedesktop.systemd1.Job", "State", bus_job_append_state, "s", j },
{ "org.freedesktop.systemd1.Job", "JobType", bus_job_append_type, "s", j },
{ "org.freedesktop.systemd1.Job", "Unit", bus_job_append_unit, "(so)", j },
{ NULL, NULL, NULL, NULL, NULL }
};
DBusMessage *reply = NULL;
Manager *m = j->manager;
if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Job", "Cancel")) {
if (!(reply = dbus_message_new_method_return(message)))
goto oom;
job_free(j);
} else
return bus_default_message_handler(j->manager, message, introspection, properties);
if (reply) {
if (!dbus_connection_send(m->bus, reply, NULL))
goto oom;
dbus_message_unref(reply);
}
return DBUS_HANDLER_RESULT_HANDLED;
oom:
if (reply)
dbus_message_unref(reply);
return DBUS_HANDLER_RESULT_NEED_MEMORY;
}
static DBusHandlerResult bus_job_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
Manager *m = data;
Job *j;
int r;
assert(connection);
assert(message);
assert(m);
log_debug("Got D-Bus request: %s.%s() on %s",
dbus_message_get_interface(message),
dbus_message_get_member(message),
dbus_message_get_path(message));
if ((r = manager_get_job_from_dbus_path(m, dbus_message_get_path(message), &j)) < 0) {
if (r == -ENOMEM)
return DBUS_HANDLER_RESULT_NEED_MEMORY;
if (r == -ENOENT)
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
return bus_send_error_reply(m, message, NULL, r);
}
return bus_job_message_dispatch(j, message);
}
const DBusObjectPathVTable bus_job_vtable = {
.message_function = bus_job_message_handler
};
void bus_job_send_change_signal(Job *j) {
char *p = NULL;
DBusMessage *m = NULL;
assert(j);
assert(j->in_dbus_queue);
LIST_REMOVE(Job, dbus_queue, j->manager->dbus_job_queue, j);
j->in_dbus_queue = false;
if (set_isempty(j->manager->subscribed))
return;
if (!(p = job_dbus_path(j)))
goto oom;
if (j->sent_dbus_new_signal) {
/* Send a change signal */
if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Job", "Changed")))
goto oom;
} else {
/* Send a new signal */
if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1", "JobNew")))
goto oom;
if (!dbus_message_append_args(m,
DBUS_TYPE_UINT32, &j->id,
DBUS_TYPE_OBJECT_PATH, &p,
DBUS_TYPE_INVALID))
goto oom;
}
if (!dbus_connection_send(j->manager->bus, m, NULL))
goto oom;
free(p);
dbus_message_unref(m);
j->sent_dbus_new_signal = true;
return;
oom:
free(p);
if (m)
dbus_message_unref(m);
log_error("Failed to allocate job change signal.");
}
void bus_job_send_removed_signal(Job *j) {
char *p = NULL;
DBusMessage *m = NULL;
assert(j);
if (set_isempty(j->manager->subscribed) || !j->sent_dbus_new_signal)
return;
if (!(p = job_dbus_path(j)))
goto oom;
if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1", "JobRemoved")))
goto oom;
if (!dbus_message_append_args(m,
DBUS_TYPE_UINT32, &j->id,
DBUS_TYPE_OBJECT_PATH, &p,
DBUS_TYPE_INVALID))
goto oom;
if (!dbus_connection_send(j->manager->bus, m, NULL))
goto oom;
free(p);
dbus_message_unref(m);
return;
oom:
free(p);
if (m)
dbus_message_unref(m);
log_error("Failed to allocate job remove signal.");
}
|
