pub fn children_are_waitable() -> Result<bool>Expand description
Whether the calling process’s exited children remain waitable.
Reads SIGCHLD without changing it: explicit SIG_IGN or SA_NOCLDWAIT
means false. This is only a snapshot, not child ownership or a lock; callers
must serialize policy changes and collection throughout checked operations.
§Errors
Returns an OS error querying sigaction; interrupted queries are retried.