[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"
#include "bus-errors.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;
}

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 (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "TryRestart"))
                job_type = JOB_TRY_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) {
                        dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Unit may be activated by dependency only.");
                        return bus_send_error_reply(m, connection, message, &error, -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) {
                        dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
                        return bus_send_error_reply(m, connection, message, &error, -EINVAL);
                }

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

        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);

        if (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 (!bus_has_subscriber(u->meta.manager)) {
                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 (!bus_has_subscriber(u->meta.manager))
                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"
398ef8ba	27	#include "bus-errors.h"
ea430986	28
4288f619 LP	29	const char bus_unit_interface[] = BUS_UNIT_INTERFACE;
4288f619 LP	30
4139c1b2 LP	31	int bus_unit_append_names(Manager m, DBusMessageIter i, const char property, void data) {
	32	char *t;
	33	Iterator j;
	34	DBusMessageIter sub;
	35	Unit *u = data;
	36
	37	if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
	38	return -ENOMEM;
	39
	40	SET_FOREACH(t, u->meta.names, j)
	41	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t))
	42	return -ENOMEM;
	43
	44	if (!dbus_message_iter_close_container(i, &sub))
	45	return -ENOMEM;
	46
	47	return 0;
	48	}
	49
5301be81 LP	50	int bus_unit_append_dependencies(Manager m, DBusMessageIter i, const char property, void data) {
	51	Unit *u;
	52	Iterator j;
	53	DBusMessageIter sub;
	54	Set *s = data;
	55
	56	if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
	57	return -ENOMEM;
	58
	59	SET_FOREACH(u, s, j)
	60	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &u->meta.id))
	61	return -ENOMEM;
	62
	63	if (!dbus_message_iter_close_container(i, &sub))
	64	return -ENOMEM;
	65
	66	return 0;
	67	}
	68
4139c1b2	69	int bus_unit_append_description(Manager m, DBusMessageIter i, const char property, void data) {
ea430986 LP	70	Unit *u = data;
	71	const char *d;
	72
	73	assert(m);
	74	assert(i);
	75	assert(property);
	76	assert(u);
	77
	78	d = unit_description(u);
	79
	80	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))
	81	return -ENOMEM;
	82
	83	return 0;
	84	}
	85
6f4706b7	86	DEFINE_BUS_PROPERTY_APPEND_ENUM(bus_unit_append_load_state, unit_load_state, UnitLoadState);
ea430986	87
4139c1b2	88	int bus_unit_append_active_state(Manager m, DBusMessageIter i, const char property, void data) {
ea430986 LP	89	Unit *u = data;
	90	const char *state;
	91
	92	assert(m);
	93	assert(i);
	94	assert(property);
	95	assert(u);
	96
	97	state = unit_active_state_to_string(unit_active_state(u));
	98
	99	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
	100	return -ENOMEM;
	101
	102	return 0;
	103	}
	104
4139c1b2	105	int bus_unit_append_sub_state(Manager m, DBusMessageIter i, const char property, void data) {
10a94420 LP	106	Unit *u = data;
	107	const char *state;
	108
	109	assert(m);
	110	assert(i);
	111	assert(property);
	112	assert(u);
	113
	114	state = unit_sub_state_to_string(u);
	115
	116	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &state))
	117	return -ENOMEM;
	118
	119	return 0;
	120	}
	121
4139c1b2	122	int bus_unit_append_can_start(Manager m, DBusMessageIter i, const char property, void data) {
38131695 LP	123	Unit *u = data;
	124	dbus_bool_t b;
	125
	126	assert(m);
	127	assert(i);
	128	assert(property);
	129	assert(u);
	130
4139c1b2	131	b = unit_can_start(u);
38131695 LP	132
	133	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
	134	return -ENOMEM;
	135
	136	return 0;
	137	}
	138
4139c1b2	139	int bus_unit_append_can_reload(Manager m, DBusMessageIter i, const char property, void data) {
38131695 LP	140	Unit *u = data;
	141	dbus_bool_t b;
	142
	143	assert(m);
	144	assert(i);
	145	assert(property);
	146	assert(u);
	147
4139c1b2	148	b = unit_can_reload(u);
38131695 LP	149
	150	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
	151	return -ENOMEM;
	152
	153	return 0;
	154	}
	155
4139c1b2	156	int bus_unit_append_job(Manager m, DBusMessageIter i, const char property, void data) {
38131695 LP	157	Unit *u = data;
	158	DBusMessageIter sub;
	159	char *p;
	160
	161	assert(m);
	162	assert(i);
	163	assert(property);
	164	assert(u);
	165
	166	if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
	167	return -ENOMEM;
	168
	169	if (u->meta.job) {
	170
	171	if (!(p = job_dbus_path(u->meta.job)))
	172	return -ENOMEM;
	173
	174	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) \|\|
86ad3bc1	175	!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
38131695 LP	176	free(p);
	177	return -ENOMEM;
	178	}
	179	} else {
	180	uint32_t id = 0;
	181
	182	/* No job, so let's fill in some placeholder
	183	* data. Since we need to fill in a valid path we
	184	* simple point to ourselves. */
	185
	186	if (!(p = unit_dbus_path(u)))
	187	return -ENOMEM;
	188
	189	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) \|\|
86ad3bc1	190	!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
38131695 LP	191	free(p);
	192	return -ENOMEM;
	193	}
	194	}
	195
	196	free(p);
	197
	198	if (!dbus_message_iter_close_container(i, &sub))
	199	return -ENOMEM;
	200
	201	return 0;
	202	}
	203
4139c1b2 LP	204	int bus_unit_append_default_cgroup(Manager m, DBusMessageIter i, const char property, void data) {
	205	Unit *u = data;
	206	char *t;
	207	CGroupBonding *cgb;
	208	bool success;
ea430986	209
4139c1b2 LP	210	assert(m);
	211	assert(i);
	212	assert(property);
	213	assert(u);
	214
	215	if ((cgb = unit_get_default_cgroup(u))) {
	216	if (!(t = cgroup_bonding_to_string(cgb)))
	217	return -ENOMEM;
	218	} else
	219	t = (char*) "";
ea430986	220
4139c1b2 LP	221	success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
	222
	223	if (cgb)
	224	free(t);
	225
	226	return success ? 0 : -ENOMEM;
	227	}
	228
	229	int bus_unit_append_cgroups(Manager m, DBusMessageIter i, const char property, void data) {
	230	Unit *u = data;
	231	CGroupBonding *cgb;
	232	DBusMessageIter sub;
	233
	234	if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
	235	return -ENOMEM;
	236
	237	LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) {
	238	char *t;
	239	bool success;
	240
	241	if (!(t = cgroup_bonding_to_string(cgb)))
	242	return -ENOMEM;
	243
	244	success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
	245	free(t);
	246
	247	if (!success)
	248	return -ENOMEM;
	249	}
	250
	251	if (!dbus_message_iter_close_container(i, &sub))
	252	return -ENOMEM;
	253
	254	return 0;
	255	}
	256
5e8d1c9a	257	static DBusHandlerResult bus_unit_message_dispatch(Unit u, DBusConnection connection, DBusMessage *message) {
b548631a LP	258	DBusMessage *reply = NULL;
	259	Manager *m = u->meta.manager;
	260	DBusError error;
	261	JobType job_type = _JOB_TYPE_INVALID;
c87eba54	262	char *path = NULL;
b548631a LP	263
	264	dbus_error_init(&error);
	265
	266	if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start"))
	267	job_type = JOB_START;
	268	else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop"))
	269	job_type = JOB_STOP;
	270	else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload"))
	271	job_type = JOB_RELOAD;
	272	else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart"))
	273	job_type = JOB_RESTART;
9a1ac7b9 LP	274	else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "TryRestart"))
9a1ac7b9 LP	275	job_type = JOB_TRY_RESTART;
4139c1b2	276	else if (UNIT_VTABLE(u)->bus_message_handler)
5e8d1c9a	277	return UNIT_VTABLE(u)->bus_message_handler(u, connection, message);
b548631a	278	else
4139c1b2	279	return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
b548631a LP	280
	281	if (job_type != _JOB_TYPE_INVALID) {
	282	const char *smode;
	283	JobMode mode;
	284	Job *j;
	285	int r;
b548631a	286
398ef8ba LP	287	if (job_type == JOB_START && u->meta.only_by_dependency) {
	288	dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Unit may be activated by dependency only.");
	289	return bus_send_error_reply(m, connection, message, &error, -EPERM);
	290	}
bc0f8771	291
b548631a LP	292	if (!dbus_message_get_args(
	293	message,
	294	&error,
	295	DBUS_TYPE_STRING, &smode,
	296	DBUS_TYPE_INVALID))
5e8d1c9a	297	return bus_send_error_reply(m, connection, message, &error, -EINVAL);
b548631a	298
398ef8ba LP	299	if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
	300	dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
	301	return bus_send_error_reply(m, connection, message, &error, -EINVAL);
	302	}
b548631a	303
398ef8ba LP	304	if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
398ef8ba LP	305	return bus_send_error_reply(m, connection, message, &error, r);
b548631a LP	306
	307	if (!(reply = dbus_message_new_method_return(message)))
	308	goto oom;
	309
	310	if (!(path = job_dbus_path(j)))
	311	goto oom;
	312
	313	if (!dbus_message_append_args(
	314	reply,
	315	DBUS_TYPE_OBJECT_PATH, &path,
	316	DBUS_TYPE_INVALID))
	317	goto oom;
	318	}
	319
c87eba54 LP	320	free(path);
c87eba54 LP	321
b548631a	322	if (reply) {
5e8d1c9a	323	if (!dbus_connection_send(connection, reply, NULL))
b548631a LP	324	goto oom;
	325
	326	dbus_message_unref(reply);
	327	}
	328
	329	return DBUS_HANDLER_RESULT_HANDLED;
	330
	331	oom:
c87eba54 LP	332	free(path);
c87eba54 LP	333
b548631a LP	334	if (reply)
	335	dbus_message_unref(reply);
	336
	337	dbus_error_free(&error);
	338
	339	return DBUS_HANDLER_RESULT_NEED_MEMORY;
ea430986 LP	340	}
ea430986 LP	341
5e8d1c9a	342	static DBusHandlerResult bus_unit_message_handler(DBusConnection connection, DBusMessage message, void *data) {
ea430986 LP	343	Manager *m = data;
	344	Unit *u;
	345	int r;
	346
	347	assert(connection);
	348	assert(message);
	349	assert(m);
	350
ea430986 LP	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);
c1e1601e	374
c0bd0cf7 LP	375	if (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;
	378	}
c1e1601e	379
a567261a	380	if (!bus_has_subscriber(u->meta.manager)) {
94b6dfa2	381	u->meta.sent_dbus_new_signal = true;
c1e1601e	382	return;
94b6dfa2	383	}
c1e1601e LP	384
	385	if (!(p = unit_dbus_path(u)))
	386	goto oom;
	387
	388	if (u->meta.sent_dbus_new_signal) {
	389	/* Send a change signal */
	390
	391	if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed")))
	392	goto oom;
	393	} else {
c1e1601e LP	394	/* Send a new signal */
c1e1601e LP	395
701cc384	396	if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew")))
c1e1601e LP	397	goto oom;
c1e1601e LP	398
c1e1601e	399	if (!dbus_message_append_args(m,
9e2f7c11	400	DBUS_TYPE_STRING, &u->meta.id,
c1e1601e LP	401	DBUS_TYPE_OBJECT_PATH, &p,
	402	DBUS_TYPE_INVALID))
	403	goto oom;
	404	}
	405
5e8d1c9a	406	if (bus_broadcast(u->meta.manager, m) < 0)
c1e1601e LP	407	goto oom;
	408
	409	free(p);
	410	dbus_message_unref(m);
	411
	412	u->meta.sent_dbus_new_signal = true;
	413
	414	return;
	415
	416	oom:
	417	free(p);
	418
	419	if (m)
	420	dbus_message_unref(m);
	421
	422	log_error("Failed to allocate unit change/new signal.");
	423	}
	424
	425	void bus_unit_send_removed_signal(Unit *u) {
	426	char *p = NULL;
	427	DBusMessage *m = NULL;
c1e1601e LP	428
	429	assert(u);
	430
a567261a	431	if (!bus_has_subscriber(u->meta.manager))
c1e1601e LP	432	return;
c1e1601e LP	433
7535cc78 LP	434	if (!u->meta.sent_dbus_new_signal)
	435	bus_unit_send_change_signal(u);
	436
c1e1601e LP	437	if (!(p = unit_dbus_path(u)))
	438	goto oom;
	439
701cc384	440	if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved")))
c1e1601e LP	441	goto oom;
c1e1601e LP	442
c1e1601e	443	if (!dbus_message_append_args(m,
9e2f7c11	444	DBUS_TYPE_STRING, &u->meta.id,
c1e1601e LP	445	DBUS_TYPE_OBJECT_PATH, &p,
	446	DBUS_TYPE_INVALID))
	447	goto oom;
	448
5e8d1c9a	449	if (bus_broadcast(u->meta.manager, m) < 0)
c1e1601e LP	450	goto oom;
	451
	452	free(p);
	453	dbus_message_unref(m);
	454
	455	return;
	456
	457	oom:
	458	free(p);
	459
	460	if (m)
	461	dbus_message_unref(m);
	462
	463	log_error("Failed to allocate unit remove signal.");
	464	}