static int busname_make_starter(BusName *n, pid_t *_pid) {
pid_t pid;
int r;
r = busname_arm_timer(n);
if (r < 0)
goto fail;
/* We have to resolve the user/group names out-of-process,
* hence let's fork here. It's messy, but well, what can we
* do? */
pid = fork();
if (pid < 0)
return -errno;
if (pid == 0) {
int ret;
default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1);
ignore_signals(SIGPIPE, -1);
log_forget_fds();
r = bus_kernel_make_starter(n->starter_fd, n->name, n->activating, n->accept_fd, n->policy, n->policy_world);
if (r < 0) {
ret = EXIT_MAKE_STARTER;
goto fail_child;
}
_exit(0);
fail_child:
log_open();
log_error_errno(r, "Failed to create starter connection at step %s: %m", exit_status_to_string(ret, EXIT_STATUS_SYSTEMD));
_exit(ret);
}
r = unit_watch_pid(UNIT(n), pid);
if (r < 0)
goto fail;
*_pid = pid;
return 0;
fail:
n->timer_event_source = sd_event_source_unref(n->timer_event_source);
return r;
}
static int busname_coldplug(Unit *u, Hashmap *deferred_work) {
BusName *n = BUSNAME(u);
int r;
assert(n);
assert(n->state == BUSNAME_DEAD);
if (n->deserialized_state == n->state)
return 0;
if (IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) {
if (n->control_pid <= 0)
return -EBADMSG;
r = unit_watch_pid(UNIT(n), n->control_pid);
if (r < 0)
return r;
r = busname_arm_timer(n);
if (r < 0)
return r;
}
if (IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_LISTENING, BUSNAME_REGISTERED, BUSNAME_RUNNING)) {
r = busname_open_fd(n);
if (r < 0)
return r;
}
if (n->deserialized_state == BUSNAME_LISTENING) {
r = busname_watch_fd(n);
if (r < 0)
return r;
}
busname_set_state(n, n->deserialized_state);
return 0;
}
static int busname_coldplug(Unit *u) {
BusName *n = BUSNAME(u);
int r;
assert(n);
assert(n->state == BUSNAME_DEAD);
if (n->deserialized_state == n->state)
return 0;
if (n->control_pid > 0 &&
pid_is_unwaited(n->control_pid) &&
IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) {
r = unit_watch_pid(UNIT(n), n->control_pid);
if (r < 0)
return r;
r = busname_arm_timer(n, usec_add(u->state_change_timestamp.monotonic, n->timeout_usec));
if (r < 0)
return r;
}
if (IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_LISTENING, BUSNAME_REGISTERED, BUSNAME_RUNNING)) {
r = busname_open_fd(n);
if (r < 0)
return r;
}
if (n->deserialized_state == BUSNAME_LISTENING) {
r = busname_watch_fd(n);
if (r < 0)
return r;
}
busname_set_state(n, n->deserialized_state);
return 0;
}
static int bus_scope_set_transient_property(
Scope *s,
const char *name,
sd_bus_message *message,
UnitSetPropertiesMode mode,
sd_bus_error *error) {
int r;
assert(s);
assert(name);
assert(message);
if (streq(name, "PIDs")) {
unsigned n = 0;
uint32_t pid;
r = sd_bus_message_enter_container(message, 'a', "u");
if (r < 0)
return r;
while ((r = sd_bus_message_read(message, "u", &pid)) > 0) {
if (pid <= 1)
return -EINVAL;
if (mode != UNIT_CHECK) {
r = unit_watch_pid(UNIT(s), pid);
if (r < 0 && r != -EEXIST)
return r;
}
n++;
}
if (r < 0)
return r;
r = sd_bus_message_exit_container(message);
if (r < 0)
return r;
if (n <= 0)
return -EINVAL;
return 1;
} else if (streq(name, "Controller")) {
const char *controller;
char *c;
r = sd_bus_message_read(message, "s", &controller);
if (r < 0)
return r;
if (!isempty(controller) && !service_name_is_valid(controller))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller);
if (mode != UNIT_CHECK) {
if (isempty(controller))
c = NULL;
else {
c = strdup(controller);
if (!c)
return -ENOMEM;
}
free(s->controller);
s->controller = c;
}
return 1;
} else if (streq(name, "TimeoutStopUSec")) {
if (mode != UNIT_CHECK) {
r = sd_bus_message_read(message, "t", &s->timeout_stop_usec);
if (r < 0)
return r;
unit_write_drop_in_format(UNIT(s), mode, name, "[Scope]\nTimeoutStopSec=%lluus\n", (unsigned long long) s->timeout_stop_usec);
} else {
r = sd_bus_message_skip(message, "t");
if (r < 0)
return r;
}
return 1;
}
return 0;
}
static int bus_scope_set_transient_property(
Scope *s,
const char *name,
sd_bus_message *message,
UnitWriteFlags flags,
sd_bus_error *error) {
int r;
assert(s);
assert(name);
assert(message);
flags |= UNIT_PRIVATE;
if (streq(name, "TimeoutStopUSec"))
return bus_set_transient_usec(UNIT(s), name, &s->timeout_stop_usec, message, flags, error);
if (streq(name, "PIDs")) {
_cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
unsigned n = 0;
r = sd_bus_message_enter_container(message, 'a', "u");
if (r < 0)
return r;
for (;;) {
uint32_t upid;
pid_t pid;
r = sd_bus_message_read(message, "u", &upid);
if (r < 0)
return r;
if (r == 0)
break;
if (upid == 0) {
if (!creds) {
r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds);
if (r < 0)
return r;
}
r = sd_bus_creds_get_pid(creds, &pid);
if (r < 0)
return r;
} else
pid = (uid_t) upid;
r = unit_pid_attachable(UNIT(s), pid, error);
if (r < 0)
return r;
if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
r = unit_watch_pid(UNIT(s), pid);
if (r < 0 && r != -EEXIST)
return r;
}
n++;
}
r = sd_bus_message_exit_container(message);
if (r < 0)
return r;
if (n <= 0)
return -EINVAL;
return 1;
} else if (streq(name, "Controller")) {
const char *controller;
/* We can't support direct connections with this, as direct connections know no service or unique name
* concept, but the Controller field stores exactly that. */
if (sd_bus_message_get_bus(message) != UNIT(s)->manager->api_bus)
return sd_bus_error_setf(error, SD_BUS_ERROR_NOT_SUPPORTED, "Sorry, Controller= logic only supported via the bus.");
r = sd_bus_message_read(message, "s", &controller);
if (r < 0)
return r;
if (!isempty(controller) && !service_name_is_valid(controller))
return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Controller '%s' is not a valid bus name.", controller);
if (!UNIT_WRITE_FLAGS_NOOP(flags)) {
r = free_and_strdup(&s->controller, empty_to_null(controller));
if (r < 0)
return r;
}
return 1;
}
return 0;
}