Not not IN_SET(…) is just too much for my poor brain. Let's invert
the expression to make it easier to undertand.
* are marked UNIT_LOADED even though nothing was actually
* loaded, as those unit types don't require a file on disk. */
- return !(!IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) ||
- u->fragment_path ||
- u->source_path ||
- !strv_isempty(u->dropin_paths) ||
- u->job ||
- u->merged_into);
+ return IN_SET(u->load_state, UNIT_NOT_FOUND, UNIT_LOADED) &&
+ !u->fragment_path &&
+ !u->source_path &&
+ strv_isempty(u->dropin_paths) &&
+ !u->job &&
+ !u->merged_into;
}
pid_t unit_control_pid(Unit *u) {