#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;

#define INVALIDATING_PROPERTIES \

"LoadState\0" \

"ActiveState\0" \

"SubState\0" \

"InactiveExitTimestamp\0" \

"ActiveEnterTimestamp\0" \

"ActiveExitTimestamp\0" \

"InactiveEnterTimestamp\0" \

"Job\0" \

"NeedDaemonReload\0" \

"\0"

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_following(Manager *m, DBusMessageIter *i, const char *property, void *data) {

Unit *u = data, *f;

const char *d;

assert(m);

assert(i);

assert(property);

assert(u);

f = unit_following(u);

d = f ? f->meta.id : "";

if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &d))

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.refuse_manual_start;

if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))

return -ENOMEM;

return 0;

}

int bus_unit_append_can_stop(Manager *m, DBusMessageIter *i, const char *property, void *data) {

Unit *u = data;

dbus_bool_t b;

assert(m);

assert(i);

assert(property);

assert(u);

/* On the lower levels we assume that every unit we can start

b = unit_can_start(u) &&

!u->meta.refuse_manual_stop;

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_can_isolate(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_isolate(u) &&

!u->meta.refuse_manual_start;

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

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 (dbus_message_is_method_call(message, "org.freedesktop.systemd1.Unit", "ResetMaintenance")) {

unit_reset_maintenance(u);

if (!(reply = dbus_message_new_method_return(message)))

goto oom;

} 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.refuse_manual_start) ||

(job_type == JOB_STOP && u->meta.refuse_manual_stop) ||

((job_type == JOB_RESTART || job_type == JOB_TRY_RESTART) &&

(u->meta.refuse_manual_start || u->meta.refuse_manual_stop))) {

dbus_set_error(&error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, may be requested 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 (!u->meta.id)

return;

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 properties changed signal. First for the

if (UNIT_VTABLE(u)->bus_invalidating_properties) {

if (!(m = bus_properties_changed_new(p,

UNIT_VTABLE(u)->bus_interface,

UNIT_VTABLE(u)->bus_invalidating_properties)))

goto oom;

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

goto oom;

dbus_message_unref(m);

}

if (!(m = bus_properties_changed_new(p, "org.freedesktop.systemd1.Unit", INVALIDATING_PROPERTIES)))

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 (!u->meta.id)

return;

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.");

}