write-normal write-bad-ptr write-boundary write-zero
write-stdin write-bad-fd
exec-once exec-arg exec-multiple exec-missing exec-bad-ptr
- join-simple join-twice join-killed join-bad-pid
+ wait-simple wait-twice wait-killed wait-bad-pid
multi-recurse multi-oom multi-child-fd);
clean_dir (), exit if $action eq 'clean';