[thirdparty/systemd.git] / src / dbus-unit.c

/*-*- 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"
#include "dbus-unit.h"

const char bus_unit_interface[] = BUS_UNIT_INTERFACE;

int bus_unit_append_names(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        char *t;
        Iterator j;
        DBusMessageIter sub;
        Unit *u = data;

        if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
                return -ENOMEM;

        SET_FOREACH(t, u->meta.names, j)
                if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t))
                        return -ENOMEM;

        if (!dbus_message_iter_close_container(i, &sub))
                return -ENOMEM;

        return 0;
}

int bus_unit_append_dependencies(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        Unit *u;
        Iterator j;
        DBusMessageIter sub;
        Set *s = data;

        if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
                return -ENOMEM;

        SET_FOREACH(u, s, j)
                if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &u->meta.id))
                        return -ENOMEM;

        if (!dbus_message_iter_close_container(i, &sub))
                return -ENOMEM;

        return 0;
}

int bus_unit_append_description(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        Unit *u = data;
        const char *d;

        assert(m);
        assert(i);
        assert(property);
        assert(u);

        d = unit_description(u);

        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
                return -ENOMEM;

        return 0;
}

DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState);

int bus_unit_append_active_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        Unit *u = data;
        const char *state;

        assert(m);
        assert(i);
        assert(property);
        assert(u);

        state = unit_active_state_to_string(unit_active_state(u));

        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
                return -ENOMEM;

        return 0;
}

int bus_unit_append_sub_state(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        Unit *u = data;
        const char *state;

        assert(m);
        assert(i);
        assert(property);
        assert(u);

        state = unit_sub_state_to_string(u);

        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
                return -ENOMEM;

        return 0;
}

int bus_unit_append_can_start(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        Unit *u = data;
        dbus_bool_t b;

        assert(m);
        assert(i);
        assert(property);
        assert(u);

        b = unit_can_start(u);

        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
                return -ENOMEM;

        return 0;
}

int bus_unit_append_can_reload(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        Unit *u = data;
        dbus_bool_t b;

        assert(m);
        assert(i);
        assert(property);
        assert(u);

        b = unit_can_reload(u);

        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
                return -ENOMEM;

        return 0;
}

int bus_unit_append_job(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        Unit *u = data;
        DBusMessageIter sub;
        char *p;

        assert(m);
        assert(i);
        assert(property);
        assert(u);

        if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
                return -ENOMEM;

        if (u->meta.job) {

                if (!(p = job_dbus_path(u->meta.job)))
                        return -ENOMEM;

                if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) ||
                    !dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
                        free(p);
                        return -ENOMEM;
                }
        } else {
                uint32_t id = 0;

                /* No job, so let's fill in some placeholder
                 * data. Since we need to fill in a valid path we
                 * simple point to ourselves. */

                if (!(p = unit_dbus_path(u)))
                        return -ENOMEM;

                if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &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;
}

int bus_unit_append_default_cgroup(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        Unit *u = data;
        char *t;
        CGroupBonding *cgb;
        bool success;

        assert(m);
        assert(i);
        assert(property);
        assert(u);

        if ((cgb = unit_get_default_cgroup(u))) {
                if (!(t = cgroup_bonding_to_string(cgb)))
                        return -ENOMEM;
        } else
                t = (char*) "";

        success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);

        if (cgb)
                free(t);

        return success ? 0 : -ENOMEM;
}

int bus_unit_append_cgroups(Manager *m, DBusMessageIter *i, const char *property, void *data) {
        Unit *u = data;
        CGroupBonding *cgb;
        DBusMessageIter sub;

        if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
                return -ENOMEM;

        LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) {
                char *t;
                bool success;

                if (!(t = cgroup_bonding_to_string(cgb)))
                        return -ENOMEM;

                success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
                free(t);

                if (!success)
                        return -ENOMEM;
        }

        if (!dbus_message_iter_close_container(i, &sub))
                return -ENOMEM;

        return 0;
}

DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_kill_mode, kill_mode, KillMode);

static DBusHandlerResult bus_unit_message_dispatch(Unit *u, DBusConnection *connection, DBusMessage *message) {
        DBusMessage *reply = NULL;
        Manager *m = u->meta.manager;
        DBusError error;
        JobType job_type = _JOB_TYPE_INVALID;
        char *path = NULL;

        dbus_error_init(&error);

        if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start"))
                job_type = JOB_START;
        else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop"))
                job_type = JOB_STOP;
        else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload"))
                job_type = JOB_RELOAD;
        else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart"))
                job_type = JOB_RESTART;
        else if (UNIT_VTABLE(u)->bus_message_handler)
                return UNIT_VTABLE(u)->bus_message_handler(u, connection, message);
        else
                return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;

        if (job_type != _JOB_TYPE_INVALID) {
                const char *smode;
                JobMode mode;
                Job *j;
                int r;

                if (job_type == JOB_START && u->meta.only_by_dependency)
                        return bus_send_error_reply(m, connection, message, NULL, -EPERM);

                if (!dbus_message_get_args(
                                    message,
                                    &error,
                                    DBUS_TYPE_STRING, &smode,
                                    DBUS_TYPE_INVALID))
                        return bus_send_error_reply(m, connection, message, &error, -EINVAL);

                if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID)
                        return bus_send_error_reply(m, connection, message, NULL, -EINVAL);

                if ((r = manager_add_job(m, job_type, u, mode, true, &j)) < 0)
                        return bus_send_error_reply(m, connection, message, NULL, r);

                if (!(reply = dbus_message_new_method_return(message)))
                        goto oom;

                if (!(path = job_dbus_path(j)))
                        goto oom;

                if (!dbus_message_append_args(
                                    reply,
                                    DBUS_TYPE_OBJECT_PATH, &path,
                                    DBUS_TYPE_INVALID))
                        goto oom;
        }

        free(path);

        if (reply) {
                if (!dbus_connection_send(connection, reply, NULL))
                        goto oom;

                dbus_message_unref(reply);
        }

        return DBUS_HANDLER_RESULT_HANDLED;

oom:
        free(path);

        if (reply)
                dbus_message_unref(reply);

        dbus_error_free(&error);

        return DBUS_HANDLER_RESULT_NEED_MEMORY;
}

static DBusHandlerResult bus_unit_message_handler(DBusConnection *connection, DBusMessage  *message, void *data) {
        Manager *m = data;
        Unit *u;
        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_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 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, connection, message, NULL, r);
        }

        return bus_unit_message_dispatch(u, connection, message);
}

const DBusObjectPathVTable bus_unit_vtable = {
        .message_function = bus_unit_message_handler
};

void bus_unit_send_change_signal(Unit *u) {
        char *p = NULL;
        DBusMessage *m = NULL;

        assert(u);
        assert(u->meta.in_dbus_queue);

        LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
        u->meta.in_dbus_queue = false;

        if (set_isempty(u->meta.manager->subscribed)) {
                u->meta.sent_dbus_new_signal = true;
                return;
        }

        if (!(p = unit_dbus_path(u)))
                goto oom;

        if (u->meta.sent_dbus_new_signal) {
                /* Send a change signal */

                if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed")))
                        goto oom;
        } else {
                /* Send a new signal */

                if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew")))
                        goto oom;

                if (!dbus_message_append_args(m,
                                              DBUS_TYPE_STRING, &u->meta.id,
                                              DBUS_TYPE_OBJECT_PATH, &p,
                                              DBUS_TYPE_INVALID))
                        goto oom;
        }

        if (bus_broadcast(u->meta.manager, m) < 0)
                goto oom;

        free(p);
        dbus_message_unref(m);

        u->meta.sent_dbus_new_signal = true;

        return;

oom:
        free(p);

        if (m)
                dbus_message_unref(m);

        log_error("Failed to allocate unit change/new signal.");
}

void bus_unit_send_removed_signal(Unit *u) {
        char *p = NULL;
        DBusMessage *m = NULL;

        assert(u);

        if (set_isempty(u->meta.manager->subscribed))
                return;

        if (!u->meta.sent_dbus_new_signal)
                bus_unit_send_change_signal(u);

        if (!(p = unit_dbus_path(u)))
                goto oom;

        if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved")))
                goto oom;

        if (!dbus_message_append_args(m,
                                      DBUS_TYPE_STRING, &u->meta.id,
                                      DBUS_TYPE_OBJECT_PATH, &p,
                                      DBUS_TYPE_INVALID))
                goto oom;

        if (bus_broadcast(u->meta.manager, m) < 0)
                goto oom;

        free(p);
        dbus_message_unref(m);

        return;

oom:
        free(p);

        if (m)
                dbus_message_unref(m);

        log_error("Failed to allocate unit remove signal.");
}
Commit	Line	Data
ea430986 LP	1	/-- Mode: C; c-basic-offset: 8 --/
ea430986 LP	2
a7334b09 LP	3	/***
	4	This file is part of systemd.
	5
	6	Copyright 2010 Lennart Poettering
	7
	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.
	12
	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.
	17
	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/>.
	20	***/
	21
ea430986 LP	22	#include <errno.h>
	23
	24	#include "dbus.h"
	25	#include "log.h"
4139c1b2	26	#include "dbus-unit.h"
ea430986	27
4288f619 LP	28	const char bus_unit_interface[] = BUS_UNIT_INTERFACE;
4288f619 LP	29
4139c1b2 LP	30	int bus_unit_append_names(Manager m, DBusMessageIter i, const char property, void data) {
	31	char *t;
	32	Iterator j;
	33	DBusMessageIter sub;
	34	Unit *u = data;
	35
	36	if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
	37	return -ENOMEM;
	38
	39	SET_FOREACH(t, u->meta.names, j)
	40	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t))
	41	return -ENOMEM;
	42
	43	if (!dbus_message_iter_close_container(i, &sub))
	44	return -ENOMEM;
	45
	46	return 0;
	47	}
	48
5301be81 LP	49	int bus_unit_append_dependencies(Manager m, DBusMessageIter i, const char property, void data) {
	50	Unit *u;
	51	Iterator j;
	52	DBusMessageIter sub;
	53	Set *s = data;
	54
	55	if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
	56	return -ENOMEM;
	57
	58	SET_FOREACH(u, s, j)
	59	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &u->meta.id))
	60	return -ENOMEM;
	61
	62	if (!dbus_message_iter_close_container(i, &sub))
	63	return -ENOMEM;
	64
	65	return 0;
	66	}
	67
4139c1b2	68	int bus_unit_append_description(Manager m, DBusMessageIter i, const char property, void data) {
ea430986 LP	69	Unit *u = data;
	70	const char *d;
	71
	72	assert(m);
	73	assert(i);
	74	assert(property);
	75	assert(u);
	76
	77	d = unit_description(u);
	78
	79	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
	80	return -ENOMEM;
	81
	82	return 0;
	83	}
	84
6f4706b7	85	DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState);
ea430986	86
4139c1b2	87	int bus_unit_append_active_state(Manager m, DBusMessageIter i, const char property, void data) {
ea430986 LP	88	Unit *u = data;
	89	const char *state;
	90
	91	assert(m);
	92	assert(i);
	93	assert(property);
	94	assert(u);
	95
	96	state = unit_active_state_to_string(unit_active_state(u));
	97
	98	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
	99	return -ENOMEM;
	100
	101	return 0;
	102	}
	103
4139c1b2	104	int bus_unit_append_sub_state(Manager m, DBusMessageIter i, const char property, void data) {
10a94420 LP	105	Unit *u = data;
	106	const char *state;
	107
	108	assert(m);
	109	assert(i);
	110	assert(property);
	111	assert(u);
	112
	113	state = unit_sub_state_to_string(u);
	114
	115	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
	116	return -ENOMEM;
	117
	118	return 0;
	119	}
	120
4139c1b2	121	int bus_unit_append_can_start(Manager m, DBusMessageIter i, const char property, void data) {
38131695 LP	122	Unit *u = data;
	123	dbus_bool_t b;
	124
	125	assert(m);
	126	assert(i);
	127	assert(property);
	128	assert(u);
	129
4139c1b2	130	b = unit_can_start(u);
38131695 LP	131
	132	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
	133	return -ENOMEM;
	134
	135	return 0;
	136	}
	137
4139c1b2	138	int bus_unit_append_can_reload(Manager m, DBusMessageIter i, const char property, void data) {
38131695 LP	139	Unit *u = data;
	140	dbus_bool_t b;
	141
	142	assert(m);
	143	assert(i);
	144	assert(property);
	145	assert(u);
	146
4139c1b2	147	b = unit_can_reload(u);
38131695 LP	148
	149	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
	150	return -ENOMEM;
	151
	152	return 0;
	153	}
	154
4139c1b2	155	int bus_unit_append_job(Manager m, DBusMessageIter i, const char property, void data) {
38131695 LP	156	Unit *u = data;
	157	DBusMessageIter sub;
	158	char *p;
	159
	160	assert(m);
	161	assert(i);
	162	assert(property);
	163	assert(u);
	164
	165	if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
	166	return -ENOMEM;
	167
	168	if (u->meta.job) {
	169
	170	if (!(p = job_dbus_path(u->meta.job)))
	171	return -ENOMEM;
	172
	173	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) \|\|
86ad3bc1	174	!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
38131695 LP	175	free(p);
	176	return -ENOMEM;
	177	}
	178	} else {
	179	uint32_t id = 0;
	180
	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. */
	184
	185	if (!(p = unit_dbus_path(u)))
	186	return -ENOMEM;
	187
	188	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) \|\|
86ad3bc1	189	!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
38131695 LP	190	free(p);
	191	return -ENOMEM;
	192	}
	193	}
	194
	195	free(p);
	196
	197	if (!dbus_message_iter_close_container(i, &sub))
	198	return -ENOMEM;
	199
	200	return 0;
	201	}
	202
4139c1b2 LP	203	int bus_unit_append_default_cgroup(Manager m, DBusMessageIter i, const char property, void data) {
	204	Unit *u = data;
	205	char *t;
	206	CGroupBonding *cgb;
	207	bool success;
ea430986	208
4139c1b2 LP	209	assert(m);
	210	assert(i);
	211	assert(property);
	212	assert(u);
	213
	214	if ((cgb = unit_get_default_cgroup(u))) {
	215	if (!(t = cgroup_bonding_to_string(cgb)))
	216	return -ENOMEM;
	217	} else
	218	t = (char*) "";
ea430986	219
4139c1b2 LP	220	success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
	221
	222	if (cgb)
	223	free(t);
	224
	225	return success ? 0 : -ENOMEM;
	226	}
	227
	228	int bus_unit_append_cgroups(Manager m, DBusMessageIter i, const char property, void data) {
	229	Unit *u = data;
	230	CGroupBonding *cgb;
	231	DBusMessageIter sub;
	232
	233	if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
	234	return -ENOMEM;
	235
	236	LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) {
	237	char *t;
	238	bool success;
	239
	240	if (!(t = cgroup_bonding_to_string(cgb)))
	241	return -ENOMEM;
	242
	243	success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
	244	free(t);
	245
	246	if (!success)
	247	return -ENOMEM;
	248	}
	249
	250	if (!dbus_message_iter_close_container(i, &sub))
	251	return -ENOMEM;
	252
	253	return 0;
	254	}
	255
	256	DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_kill_mode, kill_mode, KillMode);
	257
5e8d1c9a	258	static DBusHandlerResult bus_unit_message_dispatch(Unit u, DBusConnection connection, DBusMessage *message) {
b548631a LP	259	DBusMessage *reply = NULL;
	260	Manager *m = u->meta.manager;
	261	DBusError error;
	262	JobType job_type = _JOB_TYPE_INVALID;
c87eba54	263	char *path = NULL;
b548631a LP	264
	265	dbus_error_init(&error);
	266
	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"))
	270	job_type = JOB_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;
4139c1b2	275	else if (UNIT_VTABLE(u)->bus_message_handler)
5e8d1c9a	276	return UNIT_VTABLE(u)->bus_message_handler(u, connection, message);
b548631a	277	else
4139c1b2	278	return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
b548631a LP	279
	280	if (job_type != _JOB_TYPE_INVALID) {
	281	const char *smode;
	282	JobMode mode;
	283	Job *j;
	284	int r;
b548631a	285
bc0f8771	286	if (job_type == JOB_START && u->meta.only_by_dependency)
5e8d1c9a	287	return bus_send_error_reply(m, connection, message, NULL, -EPERM);
bc0f8771	288
b548631a LP	289	if (!dbus_message_get_args(
	290	message,
	291	&error,
	292	DBUS_TYPE_STRING, &smode,
	293	DBUS_TYPE_INVALID))
5e8d1c9a	294	return bus_send_error_reply(m, connection, message, &error, -EINVAL);
b548631a LP	295
b548631a LP	296	if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID)
5e8d1c9a	297	return bus_send_error_reply(m, connection, message, NULL, -EINVAL);
b548631a LP	298
b548631a LP	299	if ((r = manager_add_job(m, job_type, u, mode, true, &j)) < 0)
5e8d1c9a	300	return bus_send_error_reply(m, connection, message, NULL, r);
b548631a LP	301
	302	if (!(reply = dbus_message_new_method_return(message)))
	303	goto oom;
	304
	305	if (!(path = job_dbus_path(j)))
	306	goto oom;
	307
	308	if (!dbus_message_append_args(
	309	reply,
	310	DBUS_TYPE_OBJECT_PATH, &path,
	311	DBUS_TYPE_INVALID))
	312	goto oom;
	313	}
	314
c87eba54 LP	315	free(path);
c87eba54 LP	316
b548631a	317	if (reply) {
5e8d1c9a	318	if (!dbus_connection_send(connection, reply, NULL))
b548631a LP	319	goto oom;
	320
	321	dbus_message_unref(reply);
	322	}
	323
	324	return DBUS_HANDLER_RESULT_HANDLED;
	325
	326	oom:
c87eba54 LP	327	free(path);
c87eba54 LP	328
b548631a LP	329	if (reply)
	330	dbus_message_unref(reply);
	331
	332	dbus_error_free(&error);
	333
	334	return DBUS_HANDLER_RESULT_NEED_MEMORY;
ea430986 LP	335	}
ea430986 LP	336
5e8d1c9a	337	static DBusHandlerResult bus_unit_message_handler(DBusConnection connection, DBusMessage message, void *data) {
ea430986 LP	338	Manager *m = data;
	339	Unit *u;
	340	int r;
	341
	342	assert(connection);
	343	assert(message);
	344	assert(m);
	345
	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));
	350
	351	if ((r = manager_get_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 0) {
	352
	353	if (r == -ENOMEM)
	354	return DBUS_HANDLER_RESULT_NEED_MEMORY;
	355
	356	if (r == -ENOENT)
	357	return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
	358
5e8d1c9a	359	return bus_send_error_reply(m, connection, message, NULL, r);
ea430986 LP	360	}
ea430986 LP	361
5e8d1c9a	362	return bus_unit_message_dispatch(u, connection, message);
ea430986 LP	363	}
	364
	365	const DBusObjectPathVTable bus_unit_vtable = {
	366	.message_function = bus_unit_message_handler
	367	};
c1e1601e LP	368
	369	void bus_unit_send_change_signal(Unit *u) {
	370	char *p = NULL;
	371	DBusMessage *m = NULL;
	372
	373	assert(u);
	374	assert(u->meta.in_dbus_queue);
	375
	376	LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
	377	u->meta.in_dbus_queue = false;
	378
94b6dfa2 LP	379	if (set_isempty(u->meta.manager->subscribed)) {
94b6dfa2 LP	380	u->meta.sent_dbus_new_signal = true;
c1e1601e	381	return;
94b6dfa2	382	}
c1e1601e LP	383
	384	if (!(p = unit_dbus_path(u)))
	385	goto oom;
	386
	387	if (u->meta.sent_dbus_new_signal) {
	388	/* Send a change signal */
	389
	390	if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed")))
	391	goto oom;
	392	} else {
c1e1601e LP	393	/* Send a new signal */
c1e1601e LP	394
701cc384	395	if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew")))
c1e1601e LP	396	goto oom;
c1e1601e LP	397
c1e1601e	398	if (!dbus_message_append_args(m,
9e2f7c11	399	DBUS_TYPE_STRING, &u->meta.id,
c1e1601e LP	400	DBUS_TYPE_OBJECT_PATH, &p,
	401	DBUS_TYPE_INVALID))
	402	goto oom;
	403	}
	404
5e8d1c9a	405	if (bus_broadcast(u->meta.manager, m) < 0)
c1e1601e LP	406	goto oom;
	407
	408	free(p);
	409	dbus_message_unref(m);
	410
	411	u->meta.sent_dbus_new_signal = true;
	412
	413	return;
	414
	415	oom:
	416	free(p);
	417
	418	if (m)
	419	dbus_message_unref(m);
	420
	421	log_error("Failed to allocate unit change/new signal.");
	422	}
	423
	424	void bus_unit_send_removed_signal(Unit *u) {
	425	char *p = NULL;
	426	DBusMessage *m = NULL;
c1e1601e LP	427
	428	assert(u);
	429
7535cc78	430	if (set_isempty(u->meta.manager->subscribed))
c1e1601e LP	431	return;
c1e1601e LP	432
7535cc78 LP	433	if (!u->meta.sent_dbus_new_signal)
	434	bus_unit_send_change_signal(u);
	435
c1e1601e LP	436	if (!(p = unit_dbus_path(u)))
	437	goto oom;
	438
701cc384	439	if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved")))
c1e1601e LP	440	goto oom;
c1e1601e LP	441
c1e1601e	442	if (!dbus_message_append_args(m,
9e2f7c11	443	DBUS_TYPE_STRING, &u->meta.id,
c1e1601e LP	444	DBUS_TYPE_OBJECT_PATH, &p,
	445	DBUS_TYPE_INVALID))
	446	goto oom;
	447
5e8d1c9a	448	if (bus_broadcast(u->meta.manager, m) < 0)
c1e1601e LP	449	goto oom;
	450
	451	free(p);
	452	dbus_message_unref(m);
	453
	454	return;
	455
	456	oom:
	457	free(p);
	458
	459	if (m)
	460	dbus_message_unref(m);
	461
	462	log_error("Failed to allocate unit remove signal.");
	463	}