mirror of
https://github.com/systemd/systemd.git
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499 lines
20 KiB
C
499 lines
20 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include "dbus.h"
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#include "log.h"
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#define INTROSPECTION_BEGIN \
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DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
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"<node>" \
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" <interface name=\"org.freedesktop.systemd1\">" \
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" <method name=\"GetUnit\">" \
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" <arg name=\"name\" type=\"s\" direction=\"in\"/>" \
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" <arg name=\"unit\" type=\"o\" direction=\"out\"/>" \
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" </method>" \
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" <method name=\"LoadUnit\">" \
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" <arg name=\"name\" type=\"s\" direction=\"in\"/>" \
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" <arg name=\"unit\" type=\"o\" direction=\"out\"/>" \
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" </method>" \
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" <method name=\"GetJob\">" \
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" <arg name=\"id\" type=\"u\" direction=\"in\"/>" \
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" <arg name=\"job\" type=\"o\" direction=\"out\"/>" \
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" </method>" \
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" <method name=\"ClearJobs\"/>" \
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" <method name=\"ListUnits\">" \
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" <arg name=\"units\" type=\"a(ssssouso)\" direction=\"out\"/>" \
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" </method>" \
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" <method name=\"ListJobs\">" \
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" <arg name=\"jobs\" type=\"a(usssoo)\" direction=\"out\"/>" \
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" </method>" \
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" <method name=\"Subscribe\"/>" \
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" <method name=\"Unsubscribe\"/>" \
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" <method name=\"Dump\"/>" \
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" <signal name=\"UnitNew\">" \
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" <arg name=\"id\" type=\"s\"/>" \
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" <arg name=\"unit\" type=\"o\"/>" \
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" </signal>" \
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" <signal name=\"UnitRemoved\">" \
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" <arg name=\"id\" type=\"s\"/>" \
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" <arg name=\"unit\" type=\"o\"/>" \
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" </signal>" \
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" <signal name=\"JobNew\">" \
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" <arg name=\"id\" type=\"u\"/>" \
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" <arg name=\"job\" type=\"o\"/>" \
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" </signal>" \
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" <signal name=\"JobRemoved\">" \
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" <arg name=\"id\" type=\"u\"/>" \
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" <arg name=\"job\" type=\"o\"/>" \
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" </signal>" \
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" <property name=\"Version\" type=\"s\" access=\"read\"/>" \
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" <property name=\"RunningAs\" type=\"s\" access=\"read\"/>" \
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" <property name=\"BootTimestamp\" type=\"t\" access=\"read\"/>" \
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" <property name=\"LogLevel\" type=\"s\" access=\"readwrite\"/>" \
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" <property name=\"LogTarget\" type=\"s\" access=\"readwrite\"/>" \
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" </interface>" \
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BUS_PROPERTIES_INTERFACE \
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BUS_INTROSPECTABLE_INTERFACE
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#define INTROSPECTION_END \
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"</node>"
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DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_manager_append_running_as, manager_running_as, ManagerRunningAs);
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static int bus_manager_append_log_target(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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const char *t;
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assert(m);
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assert(i);
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assert(property);
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t = log_target_to_string(log_get_target());
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
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return -ENOMEM;
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return 0;
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}
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static int bus_manager_append_log_level(Manager *m, DBusMessageIter *i, const char *property, void *data) {
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const char *t;
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assert(m);
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assert(i);
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assert(property);
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t = log_level_to_string(log_get_max_level());
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if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t))
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return -ENOMEM;
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return 0;
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}
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static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection, DBusMessage *message, void *data) {
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Manager *m = data;
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const BusProperty properties[] = {
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{ "org.freedesktop.systemd1", "Version", bus_property_append_string, "s", PACKAGE_VERSION },
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{ "org.freedesktop.systemd1", "RunningAs", bus_manager_append_running_as, "s", &m->running_as },
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{ "org.freedesktop.systemd1", "BootTimestamp", bus_property_append_uint64, "t", &m->boot_timestamp },
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{ "org.freedesktop.systemd1", "LogLevel", bus_manager_append_log_level, "s", NULL },
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{ "org.freedesktop.systemd1", "LogTarget", bus_manager_append_log_target, "s", NULL },
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{ NULL, NULL, NULL, NULL, NULL }
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};
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int r;
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DBusError error;
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DBusMessage *reply = NULL;
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char * path = NULL;
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assert(connection);
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assert(message);
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assert(m);
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dbus_error_init(&error);
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log_debug("Got D-Bus request: %s.%s() on %s",
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dbus_message_get_interface(message),
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dbus_message_get_member(message),
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dbus_message_get_path(message));
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if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "GetUnit")) {
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const char *name;
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Unit *u;
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if (!dbus_message_get_args(
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message,
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&error,
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DBUS_TYPE_STRING, &name,
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DBUS_TYPE_INVALID))
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return bus_send_error_reply(m, message, &error, -EINVAL);
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if (!(u = manager_get_unit(m, name)))
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return bus_send_error_reply(m, message, NULL, -ENOENT);
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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if (!(path = unit_dbus_path(u)))
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goto oom;
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if (!dbus_message_append_args(
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reply,
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DBUS_TYPE_OBJECT_PATH, &path,
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DBUS_TYPE_INVALID))
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goto oom;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "LoadUnit")) {
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const char *name;
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Unit *u;
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if (!dbus_message_get_args(
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message,
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&error,
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DBUS_TYPE_STRING, &name,
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DBUS_TYPE_INVALID))
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return bus_send_error_reply(m, message, &error, -EINVAL);
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if ((r = manager_load_unit(m, name, &u)) < 0)
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return bus_send_error_reply(m, message, NULL, r);
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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if (!(path = unit_dbus_path(u)))
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goto oom;
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if (!dbus_message_append_args(
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reply,
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DBUS_TYPE_OBJECT_PATH, &path,
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DBUS_TYPE_INVALID))
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goto oom;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "GetJob")) {
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uint32_t id;
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Job *j;
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if (!dbus_message_get_args(
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message,
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&error,
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DBUS_TYPE_UINT32, &id,
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DBUS_TYPE_INVALID))
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return bus_send_error_reply(m, message, &error, -EINVAL);
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if (!(j = manager_get_job(m, id)))
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return bus_send_error_reply(m, message, NULL, -ENOENT);
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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if (!(path = job_dbus_path(j)))
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goto oom;
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if (!dbus_message_append_args(
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reply,
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DBUS_TYPE_OBJECT_PATH, &path,
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DBUS_TYPE_INVALID))
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goto oom;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "ClearJobs")) {
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manager_clear_jobs(m);
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "ListUnits")) {
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DBusMessageIter iter, sub;
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Iterator i;
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Unit *u;
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const char *k;
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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dbus_message_iter_init_append(reply, &iter);
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if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(ssssouso)", &sub))
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goto oom;
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HASHMAP_FOREACH_KEY(u, k, m->units, i) {
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char *u_path, *j_path;
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const char *id, *description, *load_state, *active_state, *job_type;
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DBusMessageIter sub2;
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uint32_t job_id;
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id = unit_id(u);
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if (k != id)
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continue;
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if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
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goto oom;
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description = unit_description(u);
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load_state = unit_load_state_to_string(u->meta.load_state);
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active_state = unit_active_state_to_string(unit_active_state(u));
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if (!(u_path = unit_dbus_path(u)))
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goto oom;
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if (u->meta.job) {
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job_id = (uint32_t) u->meta.job->id;
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if (!(j_path = job_dbus_path(u->meta.job))) {
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free(u_path);
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goto oom;
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}
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job_type = job_type_to_string(u->meta.job->type);
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} else {
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job_id = 0;
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j_path = u_path;
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job_type = "";
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}
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if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &id) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &description) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &load_state) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &active_state) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &job_id) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &job_type) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path)) {
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free(u_path);
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if (u->meta.job)
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free(j_path);
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goto oom;
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}
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free(u_path);
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if (u->meta.job)
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free(j_path);
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if (!dbus_message_iter_close_container(&sub, &sub2))
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goto oom;
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}
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if (!dbus_message_iter_close_container(&iter, &sub))
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goto oom;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "ListJobs")) {
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DBusMessageIter iter, sub;
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Iterator i;
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Job *j;
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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dbus_message_iter_init_append(reply, &iter);
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if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(usssoo)", &sub))
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goto oom;
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HASHMAP_FOREACH(j, m->jobs, i) {
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char *u_path, *j_path;
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const char *unit, *state, *type;
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uint32_t id;
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DBusMessageIter sub2;
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if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
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goto oom;
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id = (uint32_t) j->id;
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unit = unit_id(j->unit);
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state = job_state_to_string(j->state);
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type = job_type_to_string(j->type);
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if (!(j_path = job_dbus_path(j)))
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goto oom;
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if (!(u_path = unit_dbus_path(j->unit))) {
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free(j_path);
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goto oom;
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}
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if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &id) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &unit) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &type) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &state) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &j_path) ||
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!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &u_path)) {
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free(j_path);
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free(u_path);
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goto oom;
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}
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free(j_path);
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free(u_path);
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if (!dbus_message_iter_close_container(&sub, &sub2))
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goto oom;
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}
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if (!dbus_message_iter_close_container(&iter, &sub))
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goto oom;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "Subscribe")) {
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char *client;
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if (!(client = strdup(dbus_message_get_sender(message))))
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goto oom;
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r = set_put(m->subscribed, client);
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if (r < 0)
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return bus_send_error_reply(m, message, NULL, r);
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "Unsubscribe")) {
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char *client;
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if (!(client = set_remove(m->subscribed, (char*) dbus_message_get_sender(message))))
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return bus_send_error_reply(m, message, NULL, -ENOENT);
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free(client);
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1", "Dump")) {
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FILE *f;
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char *dump = NULL;
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size_t size;
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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if (!(f = open_memstream(&dump, &size)))
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goto oom;
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manager_dump_units(m, f, NULL);
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manager_dump_jobs(m, f, NULL);
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if (ferror(f)) {
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fclose(f);
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free(dump);
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goto oom;
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}
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fclose(f);
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if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &dump, DBUS_TYPE_INVALID)) {
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free(dump);
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goto oom;
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}
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free(dump);
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} else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
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char *introspection = NULL;
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FILE *f;
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Iterator i;
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Unit *u;
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Job *j;
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const char *k;
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size_t size;
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if (!(reply = dbus_message_new_method_return(message)))
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goto oom;
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/* We roll our own introspection code here, instead of
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* relying on bus_default_message_handler() because we
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* need to generate our introspection string
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* dynamically. */
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if (!(f = open_memstream(&introspection, &size)))
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goto oom;
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fputs(INTROSPECTION_BEGIN, f);
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HASHMAP_FOREACH_KEY(u, k, m->units, i) {
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char *p;
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if (k != unit_id(u))
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continue;
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if (!(p = bus_path_escape(k))) {
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fclose(f);
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free(introspection);
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goto oom;
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}
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fprintf(f, "<node name=\"unit/%s\"/>", p);
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free(p);
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}
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HASHMAP_FOREACH(j, m->jobs, i)
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fprintf(f, "<node name=\"job/%lu\"/>", (unsigned long) j->id);
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fputs(INTROSPECTION_END, f);
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if (ferror(f)) {
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fclose(f);
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free(introspection);
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goto oom;
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}
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fclose(f);
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if (!introspection)
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goto oom;
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if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
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free(introspection);
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goto oom;
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}
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free(introspection);
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} else
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return bus_default_message_handler(m, message, NULL, properties);
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free(path);
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if (reply) {
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if (!dbus_connection_send(connection, reply, NULL))
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goto oom;
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dbus_message_unref(reply);
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}
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return DBUS_HANDLER_RESULT_HANDLED;
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oom:
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free(path);
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if (reply)
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dbus_message_unref(reply);
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dbus_error_free(&error);
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return DBUS_HANDLER_RESULT_NEED_MEMORY;
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}
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const DBusObjectPathVTable bus_manager_vtable = {
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.message_function = bus_manager_message_handler
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};
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