T{ FN1 FILE-STATUS SWAP DROP 0= -> FALSE }T
T{ FN3 FILE-STATUS SWAP DROP 0= -> TRUE }T \ Return value is undefined
T{ FN3 R/W OPEN-FILE SWAP FID1 ! -> 0 }T
T{ FN1 FILE-STATUS SWAP DROP 0= -> FALSE }T
T{ FN3 FILE-STATUS SWAP DROP 0= -> TRUE }T \ Return value is undefined
T{ FN3 R/W OPEN-FILE SWAP FID1 ! -> 0 }T