[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) &&
                !u->meta.only_by_dependency;

        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;
}

int bus_unit_append_need_daemon_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_need_daemon_reload(u);

        if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
                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;
        bool reload_if_possible = false;

        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 (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrRestart")) {
                reload_if_possible = true;
                job_type = JOB_RESTART;
        } else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrTryRestart")) {
                reload_if_possible = true;
                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 (reload_if_possible && unit_can_reload(u)) {
                        if (job_type == JOB_RESTART)
                                job_type = JOB_RELOAD_OR_START;
                        else if (job_type == JOB_TRY_RESTART)
                                job_type = JOB_RELOAD;
                }

                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
064f51fa LP	131	b = unit_can_start(u) &&
064f51fa LP	132	!u->meta.only_by_dependency;
38131695 LP	133
	134	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
	135	return -ENOMEM;
	136
	137	return 0;
	138	}
	139
4139c1b2	140	int bus_unit_append_can_reload(Manager m, DBusMessageIter i, const char property, void data) {
38131695 LP	141	Unit *u = data;
	142	dbus_bool_t b;
	143
	144	assert(m);
	145	assert(i);
	146	assert(property);
	147	assert(u);
	148
4139c1b2	149	b = unit_can_reload(u);
38131695 LP	150
	151	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
	152	return -ENOMEM;
	153
	154	return 0;
	155	}
	156
4139c1b2	157	int bus_unit_append_job(Manager m, DBusMessageIter i, const char property, void data) {
38131695 LP	158	Unit *u = data;
	159	DBusMessageIter sub;
	160	char *p;
	161
	162	assert(m);
	163	assert(i);
	164	assert(property);
	165	assert(u);
	166
	167	if (!dbus_message_iter_open_container(i, DBUS_TYPE_STRUCT, NULL, &sub))
	168	return -ENOMEM;
	169
	170	if (u->meta.job) {
	171
	172	if (!(p = job_dbus_path(u->meta.job)))
	173	return -ENOMEM;
	174
	175	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &u->meta.job->id) \|\|
86ad3bc1	176	!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
38131695 LP	177	free(p);
	178	return -ENOMEM;
	179	}
	180	} else {
	181	uint32_t id = 0;
	182
	183	/* No job, so let's fill in some placeholder
	184	* data. Since we need to fill in a valid path we
	185	* simple point to ourselves. */
	186
	187	if (!(p = unit_dbus_path(u)))
	188	return -ENOMEM;
	189
	190	if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_UINT32, &id) \|\|
86ad3bc1	191	!dbus_message_iter_append_basic(&sub, DBUS_TYPE_OBJECT_PATH, &p)) {
38131695 LP	192	free(p);
	193	return -ENOMEM;
	194	}
	195	}
	196
	197	free(p);
	198
	199	if (!dbus_message_iter_close_container(i, &sub))
	200	return -ENOMEM;
	201
	202	return 0;
	203	}
	204
4139c1b2 LP	205	int bus_unit_append_default_cgroup(Manager m, DBusMessageIter i, const char property, void data) {
	206	Unit *u = data;
	207	char *t;
	208	CGroupBonding *cgb;
	209	bool success;
ea430986	210
4139c1b2 LP	211	assert(m);
	212	assert(i);
	213	assert(property);
	214	assert(u);
	215
	216	if ((cgb = unit_get_default_cgroup(u))) {
	217	if (!(t = cgroup_bonding_to_string(cgb)))
	218	return -ENOMEM;
	219	} else
	220	t = (char*) "";
ea430986	221
4139c1b2 LP	222	success = dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t);
	223
	224	if (cgb)
	225	free(t);
	226
	227	return success ? 0 : -ENOMEM;
	228	}
	229
	230	int bus_unit_append_cgroups(Manager m, DBusMessageIter i, const char property, void data) {
	231	Unit *u = data;
	232	CGroupBonding *cgb;
	233	DBusMessageIter sub;
	234
	235	if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub))
	236	return -ENOMEM;
	237
	238	LIST_FOREACH(by_unit, cgb, u->meta.cgroup_bondings) {
	239	char *t;
	240	bool success;
	241
	242	if (!(t = cgroup_bonding_to_string(cgb)))
	243	return -ENOMEM;
	244
	245	success = dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &t);
	246	free(t);
	247
	248	if (!success)
	249	return -ENOMEM;
	250	}
	251
	252	if (!dbus_message_iter_close_container(i, &sub))
	253	return -ENOMEM;
	254
	255	return 0;
	256	}
	257
45fb0699 LP	258	int bus_unit_append_need_daemon_reload(Manager m, DBusMessageIter i, const char property, void data) {
	259	Unit *u = data;
	260	dbus_bool_t b;
	261
	262	assert(m);
	263	assert(i);
	264	assert(property);
	265	assert(u);
	266
	267	b = unit_need_daemon_reload(u);
	268
	269	if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
	270	return -ENOMEM;
	271
	272	return 0;
	273	}
	274
5e8d1c9a	275	static DBusHandlerResult bus_unit_message_dispatch(Unit u, DBusConnection connection, DBusMessage *message) {
b548631a LP	276	DBusMessage *reply = NULL;
	277	Manager *m = u->meta.manager;
	278	DBusError error;
	279	JobType job_type = _JOB_TYPE_INVALID;
c87eba54	280	char *path = NULL;
6f28c033	281	bool reload_if_possible = false;
b548631a LP	282
	283	dbus_error_init(&error);
	284
	285	if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Start"))
	286	job_type = JOB_START;
	287	else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Stop"))
	288	job_type = JOB_STOP;
	289	else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Reload"))
	290	job_type = JOB_RELOAD;
	291	else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "Restart"))
	292	job_type = JOB_RESTART;
9a1ac7b9 LP	293	else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "TryRestart"))
9a1ac7b9 LP	294	job_type = JOB_TRY_RESTART;
6f28c033 LP	295	else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrRestart")) {
	296	reload_if_possible = true;
	297	job_type = JOB_RESTART;
	298	} else if (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ReloadOrTryRestart")) {
	299	reload_if_possible = true;
	300	job_type = JOB_TRY_RESTART;
	301	} else if (UNIT_VTABLE(u)->bus_message_handler)
5e8d1c9a	302	return UNIT_VTABLE(u)->bus_message_handler(u, connection, message);
b548631a	303	else
4139c1b2	304	return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
b548631a LP	305
	306	if (job_type != _JOB_TYPE_INVALID) {
	307	const char *smode;
	308	JobMode mode;
	309	Job *j;
	310	int r;
b548631a	311
398ef8ba LP	312	if (job_type == JOB_START && u->meta.only_by_dependency) {
	313	dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Unit may be activated by dependency only.");
	314	return bus_send_error_reply(m, connection, message, &error, -EPERM);
	315	}
bc0f8771	316
b548631a LP	317	if (!dbus_message_get_args(
	318	message,
	319	&error,
	320	DBUS_TYPE_STRING, &smode,
	321	DBUS_TYPE_INVALID))
5e8d1c9a	322	return bus_send_error_reply(m, connection, message, &error, -EINVAL);
b548631a	323
6f28c033 LP	324	if (reload_if_possible && unit_can_reload(u)) {
	325	if (job_type == JOB_RESTART)
	326	job_type = JOB_RELOAD_OR_START;
	327	else if (job_type == JOB_TRY_RESTART)
	328	job_type = JOB_RELOAD;
	329	}
	330
398ef8ba LP	331	if ((mode = job_mode_from_string(smode)) == _JOB_MODE_INVALID) {
	332	dbus_set_error(&error, BUS_ERROR_INVALID_JOB_MODE, "Job mode %s is invalid.", smode);
	333	return bus_send_error_reply(m, connection, message, &error, -EINVAL);
	334	}
b548631a	335
398ef8ba LP	336	if ((r = manager_add_job(m, job_type, u, mode, true, &error, &j)) < 0)
398ef8ba LP	337	return bus_send_error_reply(m, connection, message, &error, r);
b548631a LP	338
	339	if (!(reply = dbus_message_new_method_return(message)))
	340	goto oom;
	341
	342	if (!(path = job_dbus_path(j)))
	343	goto oom;
	344
	345	if (!dbus_message_append_args(
	346	reply,
	347	DBUS_TYPE_OBJECT_PATH, &path,
	348	DBUS_TYPE_INVALID))
	349	goto oom;
	350	}
	351
c87eba54 LP	352	free(path);
c87eba54 LP	353
b548631a	354	if (reply) {
5e8d1c9a	355	if (!dbus_connection_send(connection, reply, NULL))
b548631a LP	356	goto oom;
	357
	358	dbus_message_unref(reply);
	359	}
	360
	361	return DBUS_HANDLER_RESULT_HANDLED;
	362
	363	oom:
c87eba54 LP	364	free(path);
c87eba54 LP	365
b548631a LP	366	if (reply)
	367	dbus_message_unref(reply);
	368
	369	dbus_error_free(&error);
	370
	371	return DBUS_HANDLER_RESULT_NEED_MEMORY;
ea430986 LP	372	}
ea430986 LP	373
5e8d1c9a	374	static DBusHandlerResult bus_unit_message_handler(DBusConnection connection, DBusMessage message, void *data) {
ea430986 LP	375	Manager *m = data;
	376	Unit *u;
	377	int r;
	378
	379	assert(connection);
	380	assert(message);
	381	assert(m);
	382
ea430986 LP	383	if ((r = manager_get_unit_from_dbus_path(m, dbus_message_get_path(message), &u)) < 0) {
	384
	385	if (r == -ENOMEM)
	386	return DBUS_HANDLER_RESULT_NEED_MEMORY;
	387
	388	if (r == -ENOENT)
	389	return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
	390
5e8d1c9a	391	return bus_send_error_reply(m, connection, message, NULL, r);
ea430986 LP	392	}
ea430986 LP	393
5e8d1c9a	394	return bus_unit_message_dispatch(u, connection, message);
ea430986 LP	395	}
	396
	397	const DBusObjectPathVTable bus_unit_vtable = {
	398	.message_function = bus_unit_message_handler
	399	};
c1e1601e LP	400
	401	void bus_unit_send_change_signal(Unit *u) {
	402	char *p = NULL;
	403	DBusMessage *m = NULL;
	404
	405	assert(u);
c1e1601e	406
c0bd0cf7 LP	407	if (u->meta.in_dbus_queue) {
	408	LIST_REMOVE(Meta, dbus_queue, u->meta.manager->dbus_unit_queue, &u->meta);
	409	u->meta.in_dbus_queue = false;
	410	}
c1e1601e	411
a567261a	412	if (!bus_has_subscriber(u->meta.manager)) {
94b6dfa2	413	u->meta.sent_dbus_new_signal = true;
c1e1601e	414	return;
94b6dfa2	415	}
c1e1601e LP	416
	417	if (!(p = unit_dbus_path(u)))
	418	goto oom;
	419
	420	if (u->meta.sent_dbus_new_signal) {
	421	/* Send a change signal */
	422
	423	if (!(m = dbus_message_new_signal(p, "org.freedesktop.systemd1.Unit", "Changed")))
	424	goto oom;
	425	} else {
c1e1601e LP	426	/* Send a new signal */
c1e1601e LP	427
701cc384	428	if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitNew")))
c1e1601e LP	429	goto oom;
c1e1601e LP	430
c1e1601e	431	if (!dbus_message_append_args(m,
9e2f7c11	432	DBUS_TYPE_STRING, &u->meta.id,
c1e1601e LP	433	DBUS_TYPE_OBJECT_PATH, &p,
	434	DBUS_TYPE_INVALID))
	435	goto oom;
	436	}
	437
5e8d1c9a	438	if (bus_broadcast(u->meta.manager, m) < 0)
c1e1601e LP	439	goto oom;
	440
	441	free(p);
	442	dbus_message_unref(m);
	443
	444	u->meta.sent_dbus_new_signal = true;
	445
	446	return;
	447
	448	oom:
	449	free(p);
	450
	451	if (m)
	452	dbus_message_unref(m);
	453
	454	log_error("Failed to allocate unit change/new signal.");
	455	}
	456
	457	void bus_unit_send_removed_signal(Unit *u) {
	458	char *p = NULL;
	459	DBusMessage *m = NULL;
c1e1601e LP	460
	461	assert(u);
	462
a567261a	463	if (!bus_has_subscriber(u->meta.manager))
c1e1601e LP	464	return;
c1e1601e LP	465
7535cc78 LP	466	if (!u->meta.sent_dbus_new_signal)
	467	bus_unit_send_change_signal(u);
	468
c1e1601e LP	469	if (!(p = unit_dbus_path(u)))
	470	goto oom;
	471
701cc384	472	if (!(m = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "UnitRemoved")))
c1e1601e LP	473	goto oom;
c1e1601e LP	474
c1e1601e	475	if (!dbus_message_append_args(m,
9e2f7c11	476	DBUS_TYPE_STRING, &u->meta.id,
c1e1601e LP	477	DBUS_TYPE_OBJECT_PATH, &p,
	478	DBUS_TYPE_INVALID))
	479	goto oom;
	480
5e8d1c9a	481	if (bus_broadcast(u->meta.manager, m) < 0)
c1e1601e LP	482	goto oom;
	483
	484	free(p);
	485	dbus_message_unref(m);
	486
	487	return;
	488
	489	oom:
	490	free(p);
	491
	492	if (m)
	493	dbus_message_unref(m);
	494
	495	log_error("Failed to allocate unit remove signal.");
	496	}