#include "sd-bus.h"

#include "log.h"

#include "selinux-access.h"

#include "cgroup-util.h"

#include "strv.h"

#include "path-util.h"

#include "fileio.h"

#include "bus-errors.h"

#include "dbus.h"

#include "dbus-manager.h"

#include "dbus-unit.h"

static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_load_state, unit_load_state, UnitLoadState);

static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_job_mode, job_mode, JobMode);

static int property_get_names(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

Iterator i;

const char *t;

int r;

assert(bus);

assert(reply);

assert(u);

r = sd_bus_message_open_container(reply, 'a', "s");

if (r < 0)

return r;

SET_FOREACH(t, u->names, i) {

r = sd_bus_message_append(reply, "s", t);

if (r < 0)

return r;

}

return sd_bus_message_close_container(reply);

}

static int property_get_following(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata, *f;

assert(bus);

assert(reply);

assert(u);

f = unit_following(u);

return sd_bus_message_append(reply, "s", f ? f->id : "");

}

static int property_get_dependencies(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Set *s = *(Set**) userdata;

Iterator j;

Unit *u;

int r;

assert(bus);

assert(reply);

r = sd_bus_message_open_container(reply, 'a', "s");

if (r < 0)

return r;

SET_FOREACH(u, s, j) {

r = sd_bus_message_append(reply, "s", u->id);

if (r < 0)

return r;

}

return sd_bus_message_close_container(reply);

}

static int property_get_description(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

return sd_bus_message_append(reply, "s", unit_description(u));

}

static int property_get_active_state(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

return sd_bus_message_append(reply, "s", unit_active_state_to_string(unit_active_state(u)));

}

static int property_get_sub_state(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

return sd_bus_message_append(reply, "s", unit_sub_state_to_string(u));

}

static int property_get_unit_file_state(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

return sd_bus_message_append(reply, "s", unit_file_state_to_string(unit_get_unit_file_state(u)));

}

static int property_get_can_start(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

return sd_bus_message_append(reply, "b", unit_can_start(u) && !u->refuse_manual_start);

}

static int property_get_can_stop(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

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

return sd_bus_message_append(reply, "b", unit_can_start(u) && !u->refuse_manual_stop);

}

static int property_get_can_reload(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

return sd_bus_message_append(reply, "b", unit_can_reload(u));

}

static int property_get_can_isolate(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

return sd_bus_message_append(reply, "b", unit_can_isolate(u) && !u->refuse_manual_start);

}

static int property_get_job(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

_cleanup_free_ char *p = NULL;

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

if (!u->job)

return sd_bus_message_append(reply, "(uo)", 0, "/");

p = job_dbus_path(u->job);

if (!p)

return -ENOMEM;

return sd_bus_message_append(reply, "(uo)", u->job->id, p);

}

static int property_get_need_daemon_reload(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

return sd_bus_message_append(reply, "b", unit_need_daemon_reload(u));

}

static int property_get_conditions(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

Condition *c;

int r;

assert(bus);

assert(reply);

assert(u);

r = sd_bus_message_open_container(reply, 'a', "(sbbsi)");

if (r < 0)

return r;

LIST_FOREACH(conditions, c, u->conditions) {

r = sd_bus_message_append(reply, "(sbbsi)",

condition_type_to_string(c->type),

c->trigger, c->negate,

c->parameter, c->state);

if (r < 0)

return r;

}

return sd_bus_message_close_container(reply);

}

static int property_get_load_error(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

_cleanup_bus_error_free_ sd_bus_error e = SD_BUS_ERROR_NULL;

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

if (u->load_error != 0)

sd_bus_error_set_errno(&e, u->load_error);

return sd_bus_message_append(reply, "(ss)", e.name, e.message);

}

int bus_unit_method_start_generic(sd_bus *bus, sd_bus_message *message, Unit *u, JobType job_type, bool reload_if_possible, sd_bus_error *error) {

const char *smode;

JobMode mode;

int r;

assert(bus);

assert(message);

assert(u);

assert(job_type >= 0 && job_type < _JOB_TYPE_MAX);

r = sd_bus_message_read(message, "s", &smode);

if (r < 0)

return r;

mode = job_mode_from_string(smode);

if (mode < 0)

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Job mode %s invalid", smode);

return bus_unit_queue_job(bus, message, u, job_type, mode, reload_if_possible, error);

}

static int method_start(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

return bus_unit_method_start_generic(bus, message, userdata, JOB_START, false, error);

}

static int method_stop(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

return bus_unit_method_start_generic(bus, message, userdata, JOB_STOP, false, error);

}

static int method_reload(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

return bus_unit_method_start_generic(bus, message, userdata, JOB_RELOAD, false, error);

}

static int method_restart(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

return bus_unit_method_start_generic(bus, message, userdata, JOB_RESTART, false, error);

}

static int method_try_restart(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

return bus_unit_method_start_generic(bus, message, userdata, JOB_TRY_RESTART, false, error);

}

static int method_reload_or_restart(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

return bus_unit_method_start_generic(bus, message, userdata, JOB_RESTART, true, error);

}

static int method_reload_or_try_restart(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

return bus_unit_method_start_generic(bus, message, userdata, JOB_TRY_RESTART, true, error);

}

int bus_unit_method_kill(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

Unit *u = userdata;

const char *swho;

int32_t signo;

KillWho who;

int r;

assert(bus);

assert(message);

assert(u);

r = sd_bus_message_read(message, "si", &swho, &signo);

if (r < 0)

return r;

if (isempty(swho))

who = KILL_ALL;

else {

who = kill_who_from_string(swho);

if (who < 0)

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid who argument %s", swho);

}

if (signo <= 0 || signo >= _NSIG)

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Signal number out of range.");

r = selinux_unit_access_check(u, bus, message, "stop", error);

if (r < 0)

return r;

r = unit_kill(u, who, signo, error);

if (r < 0)

return r;

return sd_bus_reply_method_return(message, NULL);

}

int bus_unit_method_reset_failed(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

Unit *u = userdata;

int r;

assert(bus);

assert(message);

assert(u);

r = selinux_unit_access_check(u, bus, message, "reload", error);

if (r < 0)

return r;

unit_reset_failed(u);

return sd_bus_reply_method_return(message, NULL);

}

int bus_unit_method_set_properties(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {

Unit *u = userdata;

int runtime, r;

assert(bus);

assert(message);

assert(u);

r = sd_bus_message_read(message, "b", &runtime);

if (r < 0)

return r;

r = selinux_unit_access_check(u, bus, message, "start", error);

if (r < 0)

return r;

r = bus_unit_set_properties(u, message, runtime ? UNIT_RUNTIME : UNIT_PERSISTENT, true, error);

if (r < 0)

return r;

return sd_bus_reply_method_return(message, NULL);

}

const sd_bus_vtable bus_unit_vtable[] = {

SD_BUS_VTABLE_START(0),

SD_BUS_PROPERTY("Id", "s", NULL, offsetof(Unit, id), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Names", "as", property_get_names, 0, SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Following", "s", property_get_following, 0, 0),

SD_BUS_PROPERTY("Requires", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRES]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("RequiresOverridable", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRES_OVERRIDABLE]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Requisite", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUISITE]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("RequisiteOverridable", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUISITE_OVERRIDABLE]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Wants", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_WANTS]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("BindsTo", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BINDS_TO]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("PartOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_PART_OF]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("RequiredBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("RequiredByOverridable", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_REQUIRED_BY_OVERRIDABLE]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("WantedBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_WANTED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("BoundBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BOUND_BY]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("ConsistsOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONSISTS_OF]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Conflicts", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONFLICTS]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("ConflictedBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_CONFLICTED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Before", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_BEFORE]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("After", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_AFTER]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("OnFailure", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_ON_FAILURE]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Triggers", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_TRIGGERS]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("TriggeredBy", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_TRIGGERED_BY]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("PropagatesReloadTo", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_PROPAGATES_RELOAD_TO]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("ReloadPropagatedFrom", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_RELOAD_PROPAGATED_FROM]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("JoinsNamespaceOf", "as", property_get_dependencies, offsetof(Unit, dependencies[UNIT_JOINS_NAMESPACE_OF]), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("RequiresMountsFor", "as", NULL, offsetof(Unit, requires_mounts_for), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Documentation", "as", NULL, offsetof(Unit, documentation), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Description", "s", property_get_description, 0, SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("LoadState", "s", property_get_load_state, offsetof(Unit, load_state), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("ActiveState", "s", property_get_active_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),

SD_BUS_PROPERTY("SubState", "s", property_get_sub_state, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),

SD_BUS_PROPERTY("FragmentPath", "s", NULL, offsetof(Unit, fragment_path), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("SourcePath", "s", NULL, offsetof(Unit, source_path), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("DropInPaths", "as", NULL, offsetof(Unit, dropin_paths), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("UnitFileState", "s", property_get_unit_file_state, 0, 0),

BUS_PROPERTY_DUAL_TIMESTAMP("InactiveExitTimestamp", offsetof(Unit, inactive_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),

BUS_PROPERTY_DUAL_TIMESTAMP("ActiveEnterTimestamp", offsetof(Unit, active_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),

BUS_PROPERTY_DUAL_TIMESTAMP("ActiveExitTimestamp", offsetof(Unit, active_exit_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),

BUS_PROPERTY_DUAL_TIMESTAMP("InactiveEnterTimestamp", offsetof(Unit, inactive_enter_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),

SD_BUS_PROPERTY("CanStart", "b", property_get_can_start, 0, SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("CanStop", "b", property_get_can_stop, 0, SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("CanReload", "b", property_get_can_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("CanIsolate", "b", property_get_can_isolate, 0, SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Job", "(uo)", property_get_job, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),

SD_BUS_PROPERTY("StopWhenUnneeded", "b", bus_property_get_bool, offsetof(Unit, stop_when_unneeded), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("RefuseManualStart", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_start), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("RefuseManualStop", "b", bus_property_get_bool, offsetof(Unit, refuse_manual_stop), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("AllowIsolate", "b", bus_property_get_bool, offsetof(Unit, allow_isolate), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("DefaultDependencies", "b", bus_property_get_bool, offsetof(Unit, default_dependencies), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("OnFailureJobMode", "s", property_get_job_mode, offsetof(Unit, on_failure_job_mode), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("IgnoreOnIsolate", "b", bus_property_get_bool, offsetof(Unit, ignore_on_isolate), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("IgnoreOnSnapshot", "b", bus_property_get_bool, offsetof(Unit, ignore_on_snapshot), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("NeedDaemonReload", "b", property_get_need_daemon_reload, 0, SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("JobTimeoutUSec", "t", bus_property_get_usec, offsetof(Unit, job_timeout), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("ConditionResult", "b", bus_property_get_bool, offsetof(Unit, condition_result), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),

BUS_PROPERTY_DUAL_TIMESTAMP("ConditionTimestamp", offsetof(Unit, condition_timestamp), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),

SD_BUS_PROPERTY("Conditions", "a(sbbsi)", property_get_conditions, 0, 0),

SD_BUS_PROPERTY("LoadError", "(ss)", property_get_load_error, 0, SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_PROPERTY("Transient", "b", bus_property_get_bool, offsetof(Unit, transient), SD_BUS_VTABLE_PROPERTY_CONST),

SD_BUS_METHOD("Start", "s", "o", method_start, 0),

SD_BUS_METHOD("Stop", "s", "o", method_stop, 0),

SD_BUS_METHOD("Reload", "s", "o", method_reload, 0),

SD_BUS_METHOD("Restart", "s", "o", method_restart, 0),

SD_BUS_METHOD("TryRestart", "s", "o", method_try_restart, 0),

SD_BUS_METHOD("ReloadOrRestart", "s", "o", method_reload_or_restart, 0),

SD_BUS_METHOD("ReloadOrTryRestart", "s", "o", method_reload_or_try_restart, 0),

SD_BUS_METHOD("Kill", "si", NULL, bus_unit_method_kill, 0),

SD_BUS_METHOD("ResetFailed", NULL, NULL, bus_unit_method_reset_failed, 0),

SD_BUS_METHOD("SetProperties", "ba(sv)", NULL, bus_unit_method_set_properties, 0),

SD_BUS_VTABLE_END

};

static int property_get_slice(

sd_bus *bus,

const char *path,

const char *interface,

const char *property,

sd_bus_message *reply,

void *userdata,

sd_bus_error *error) {

Unit *u = userdata;

assert(bus);

assert(reply);

assert(u);

return sd_bus_message_append(reply, "s", unit_slice_name(u));

}

const sd_bus_vtable bus_unit_cgroup_vtable[] = {

SD_BUS_VTABLE_START(0),

SD_BUS_PROPERTY("Slice", "s", property_get_slice, 0, 0),

SD_BUS_PROPERTY("ControlGroup", "s", NULL, offsetof(Unit, cgroup_path), 0),

SD_BUS_VTABLE_END

};

static int send_new_signal(sd_bus *bus, void *userdata) {

_cleanup_bus_message_unref_ sd_bus_message *m = NULL;

_cleanup_free_ char *p = NULL;

Unit *u = userdata;

int r;

assert(bus);

assert(u);

p = unit_dbus_path(u);

if (!u)

return -ENOMEM;

r = sd_bus_message_new_signal(

bus,

&m,

"/org/freedesktop/systemd1",

"org.freedesktop.systemd1.Manager",

"UnitNew");

if (r < 0)

return r;

r = sd_bus_message_append(m, "so", u->id, p);

if (r < 0)

return r;

return sd_bus_send(bus, m, NULL);

}

static int send_changed_signal(sd_bus *bus, void *userdata) {

_cleanup_free_ char *p = NULL;

Unit *u = userdata;

int r;

assert(bus);

assert(u);

p = unit_dbus_path(u);

if (!p)

return -ENOMEM;

/* Send a properties changed signal. First for the specific

r = sd_bus_emit_properties_changed_strv(

bus, p,

UNIT_VTABLE(u)->bus_interface,

NULL);

if (r < 0)

return r;

return sd_bus_emit_properties_changed_strv(

bus, p,

"org.freedesktop.systemd1.Unit",

NULL);

}

void bus_unit_send_change_signal(Unit *u) {

int r;

assert(u);

if (u->in_dbus_queue) {

LIST_REMOVE(dbus_queue, u->manager->dbus_unit_queue, u);

u->in_dbus_queue = false;

}

if (!u->id)

return;

r = bus_foreach_bus(u->manager, NULL, u->sent_dbus_new_signal ? send_changed_signal : send_new_signal, u);

if (r < 0)

log_debug("Failed to send unit change signal for %s: %s", u->id, strerror(-r));

u->sent_dbus_new_signal = true;

}

static int send_removed_signal(sd_bus *bus, void *userdata) {

_cleanup_bus_message_unref_ sd_bus_message *m = NULL;

_cleanup_free_ char *p = NULL;

Unit *u = userdata;

int r;

assert(bus);

assert(u);

p = unit_dbus_path(u);

if (!u)

return -ENOMEM;

r = sd_bus_message_new_signal(

bus,

&m,

"/org/freedesktop/systemd1",

"org.freedesktop.systemd1.Manager",

"UnitRemoved");

if (r < 0)

return r;

r = sd_bus_message_append(m, "so", u->id, p);

if (r < 0)

return r;

return sd_bus_send(bus, m, NULL);

}

void bus_unit_send_removed_signal(Unit *u) {

int r;

assert(u);

if (!u->sent_dbus_new_signal)

bus_unit_send_change_signal(u);

if (!u->id)

return;

r = bus_foreach_bus(u->manager, NULL, send_removed_signal, u);

if (r < 0)

log_debug("Failed to send unit remove signal for %s: %s", u->id, strerror(-r));

}

int bus_unit_queue_job(

sd_bus *bus,

sd_bus_message *message,

Unit *u,

JobType type,

JobMode mode,

bool reload_if_possible,

sd_bus_error *error) {

_cleanup_free_ char *path = NULL;

Job *j;

int r;

assert(bus);

assert(message);

assert(u);

assert(type >= 0 && type < _JOB_TYPE_MAX);

assert(mode >= 0 && mode < _JOB_MODE_MAX);

if (reload_if_possible && unit_can_reload(u)) {

if (type == JOB_RESTART)

type = JOB_RELOAD_OR_START;

else if (type == JOB_TRY_RESTART)

type = JOB_RELOAD;

}

r = selinux_unit_access_check(

u, bus, message,

(type == JOB_START || type == JOB_RESTART || type == JOB_TRY_RESTART) ? "start" :

type == JOB_STOP ? "stop" : "reload", error);

if (r < 0)

return r;

if (type == JOB_STOP &&

(u->load_state == UNIT_NOT_FOUND || u->load_state == UNIT_ERROR) &&

unit_active_state(u) == UNIT_INACTIVE)

return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_UNIT, "Unit %s not loaded.", u->id);

if ((type == JOB_START && u->refuse_manual_start) ||

(type == JOB_STOP && u->refuse_manual_stop) ||

((type == JOB_RESTART || type == JOB_TRY_RESTART) && (u->refuse_manual_start || u->refuse_manual_stop)))

return sd_bus_error_setf(error, BUS_ERROR_ONLY_BY_DEPENDENCY, "Operation refused, unit %s may be requested by dependency only.", u->id);

r = manager_add_job(u->manager, type, u, mode, true, error, &j);

if (r < 0)

return r;

if (bus == u->manager->api_bus) {

if (!j->subscribed) {

r = sd_bus_track_new(bus, &j->subscribed, NULL, NULL);

if (r < 0)

return r;

}

r = sd_bus_track_add_sender(j->subscribed, message);

if (r < 0)

return r;

}

path = job_dbus_path(j);

if (!path)

return -ENOMEM;

return sd_bus_reply_method_return(message, "o", path);

}

static int bus_unit_set_transient_property(

Unit *u,

const char *name,

sd_bus_message *message,

UnitSetPropertiesMode mode,

sd_bus_error *error) {

int r;

assert(u);

assert(name);

assert(message);

if (streq(name, "Description")) {

const char *d;

r = sd_bus_message_read(message, "s", &d);

if (r < 0)

return r;

if (mode != UNIT_CHECK) {

r = unit_set_description(u, d);

if (r < 0)

return r;

unit_write_drop_in_format(u, mode, name, "[Unit]\nDescription=%s\n", d);

}

return 1;

} else if (streq(name, "Slice") && unit_get_cgroup_context(u)) {

const char *s;

r = sd_bus_message_read(message, "s", &s);

if (r < 0)

return r;

if (!unit_name_is_valid(s, TEMPLATE_INVALID) || !endswith(s, ".slice"))

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid slice name %s", s);

if (isempty(s)) {

if (mode != UNIT_CHECK) {

unit_ref_unset(&u->slice);

unit_remove_drop_in(u, mode, name);

}

} else {

Unit *slice;

r = manager_load_unit(u->manager, s, NULL, error, &slice);

if (r < 0)

return r;

if (slice->type != UNIT_SLICE)

return -EINVAL;

if (mode != UNIT_CHECK) {

unit_ref_set(&u->slice, slice);

unit_write_drop_in_private_format(u, mode, name, "Slice=%s\n", s);

}

}

return 1;

} else if (streq(name, "Requires") ||

streq(name, "RequiresOverridable") ||

streq(name, "Requisite") ||

streq(name, "RequisiteOverridable") ||

streq(name, "Wants") ||

streq(name, "BindsTo") ||

streq(name, "Conflicts") ||

streq(name, "Before") ||

streq(name, "After") ||

streq(name, "OnFailure") ||

streq(name, "PropagatesReloadTo") ||

streq(name, "ReloadPropagatedFrom") ||

streq(name, "PartOf")) {

UnitDependency d;

const char *other;

d = unit_dependency_from_string(name);

if (d < 0)

return -EINVAL;

r = sd_bus_message_enter_container(message, 'a', "s");

if (r < 0)

return r;

while ((r = sd_bus_message_read(message, "s", &other)) > 0) {

if (!unit_name_is_valid(other, TEMPLATE_INVALID))

return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid unit name %s", other);

if (mode != UNIT_CHECK) {

_cleanup_free_ char *label = NULL;

r = unit_add_dependency_by_name(u, d, other, NULL, true);

if (r < 0)

return r;

label = strjoin(name, "-", other, NULL);

if (!label)

return -ENOMEM;

unit_write_drop_in_format(u, mode, label, "[Unit]\n%s=%s\n", name, other);

}

}

if (r < 0)

return r;

r = sd_bus_message_exit_container(message);

if (r < 0)

return r;

return 1;

}

return 0;

}

int bus_unit_set_properties(

Unit *u,

sd_bus_message *message,

UnitSetPropertiesMode mode,

bool commit,

sd_bus_error *error) {

bool for_real = false;

unsigned n = 0;

int r;

assert(u);

assert(message);

/* We iterate through the array twice. First run we just check

r = sd_bus_message_enter_container(message, 'a', "(sv)");

if (r < 0)

return r;

for (;;) {

const char *name;

r = sd_bus_message_enter_container(message, 'r', "sv");

if (r < 0)

return r;

if (r == 0) {

if (for_real || mode == UNIT_CHECK)

break;

/* Reached EOF. Let's try again, and this time for realz... */

r = sd_bus_message_rewind(message, false);

if (r < 0)

return r;

for_real = true;

continue;

}

r = sd_bus_message_read(message, "s", &name);

if (r < 0)

return r;

if (!UNIT_VTABLE(u)->bus_set_property)

return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Objects of this type do not support setting properties.");

r = sd_bus_message_enter_container(message, 'v', NULL);

if (r < 0)

return r;

r = UNIT_VTABLE(u)->bus_set_property(u, name, message, for_real ? mode : UNIT_CHECK, error);

if (r == 0 && u->transient && u->load_state == UNIT_STUB)

r = bus_unit_set_transient_property(u, name, message, for_real ? mode : UNIT_CHECK, error);

if (r < 0)

return r;

if (r == 0)

return sd_bus_error_setf(error, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Cannot set property %s, or unknown property.", name);

r = sd_bus_message_exit_container(message);

if (r < 0)

return r;

r = sd_bus_message_exit_container(message);

if (r < 0)

return r;

n += for_real;

}

r = sd_bus_message_exit_container(message);

if (r < 0)

return r;

if (commit && n > 0 && UNIT_VTABLE(u)->bus_commit_properties)

UNIT_VTABLE(u)->bus_commit_properties(u);

return n;

}