File Management - IBM

Table 26. I/O Feedback Area for Database Files (continued)
Offset Data Type Length Contents
Bit 6: File position changed indicator. Set
only for read and positioning I/O
operations. Not set for write, update,
and delete I/O operations.
0 File position did not change.
1 File position did change.
Bit 7: Pending exception indicator. Valid for
files open for input only and
SEQONLY(*YES N) where N is greater
than 1.
0 Pending retrieval error does
not exist.
1 Pending retrieval error does
exist.
Bit 8: Duplicate key indicator.
0 The key of the last read or
write operation was not a
duplicate key.
1 The key of the last read or
write operation was a
duplicate key.
20 Binary 2 Number of key fields. Use this offset for binary
operations. Use the next offset (offset 21) for
character operations. These offsets overlap and
provide the same value (there can be no more
than 32 key fields, and only the low-order byte of
offset 20 is used).
21 Character 1 Number of key fields.
22 Character 4 Reserved.
26 Binary 2 Key length.
28 Binary 2 Data member number.
30 Binary 4 Relative record number in data member.
34 Character * Key value.
* Character * Null key field byte map.
Get attributes feedback area
Performing the get attributes operation allows you to obtain certain information
about a specific display device or ICF session.
Table 27. Get Attributes
Offset Data Type Length Contents File Type
0 Character 10 Program device name. Display, ICF
10 Character 10 Device description name. Name of the device description
associated with this entry.
Display, ICF
20 Character 10 User ID. Display, ICF
30 Character 1 Device class:
Display, ICF
190 File Management V4R5
D Display
I ICF
U Unknown