File Management - IBM

Table 23. Common I/O Feedback Area (continued)
Offset Data Type Length Contents
19 Character 1 Current operation.
hex 01 Read or read block or read from invited devices
hex 02 Read direct
hex 03 Read by key
hex 05 Write or write block
hex 06 Write-read
hex 07 Update
hex 08 Delete
hex 09 Force-end-of-data
hex 0A Force-end-of-volume
hex 0D Release record lock
hex 0E Change end-of-data
hex 0F Put deleted record
hex 11 Release device
hex 12 Acquire device
20 Character 10 Name of the record format just processed, which is either:
v Specified on the I/O request, or
v Determined by default or format selection processing
For display files, the default name is either the name of the
only record format in the file or the previous record format
name for the record written to the display that contains
input-capable fields. Because a display file may have
multiple formats on the display at the same time, this
format may not represent the format where the last cursor
position was typed.
For ICF files, the format name is determined by the
system, based on the format selection option used. Refer to
the ICF Programming book for more information.
30 Character 2 Device class:
180 File Management V4R5
Byte 1:
hex 00 Database
hex 01 Display
hex 02 Printer
hex 04 Diskette
hex 05 Tape
hex 09 Save
hex 0B ICF