__WCLONE
CATCH_EINTR(n = waitpid(pid, &status, __WCLONE));
if ((p->exit_signal != SIGCHLD) ^ !!(wo->wo_flags & __WCLONE))
__WNOTHREAD|__WCLONE|__WALL))
__WNOTHREAD|__WCLONE|__WALL))
waiting = waitpid(ret, &status, __WCLONE);