Read this section to understand parameter 3 that is passed to the
user label program.
- Position 1- 80
- Current volume label
- Position 81-160
- The last processed HDR1 or TRL1 label.
- Position 161-240
- The last processed HDR2 or TRL2 label.
- Position 241-242
- User label number
- Output files: The number of the next user label to be written in the
current header or trailer group.
- Input files: The total count of user labels read in the current header
or trailer group.
- Position 243
- Open file option
The open file option field contains a character that indicates
whether the file is open for input or for output.
- I Indicates that the file is an input file.
- O Indicates that the file is an output file.
- Position 244
- Expect labels
The expect labels field contains an integer indicating whether the call is returning or expecting labels
from the user program.
- 0 indicates that the user program is returning labels.
- 1 indicates that the user program is expecting labels.