Use of the parameter UEPFSHIP
UEPFSHIP contains the address of a 16-byte area. This area consists of 4 characters, followed by 3 fullwords.
If the first byte contains 'Y', this request has been function
shipped to this region. In this case, if your exit program wants to
bypass file control (by setting a return code of UERCBYP), it must
set the 3 fullwords as follows:
- Fullword 1
- The length of the buffer area
- Fullword 2
- The length of the record
- Fullword 3
- The length of the modified RIDFLD.
Doing this ensures that the data and RIDFLD are correctly shipped back.