MFFH_MODIFY_TRACE

Modifies some FCD fields, to save directly accessing the FCD. You can use this call whether you are issuing standard COBOL I/O statements or calling the File Handler explicitly using the API.

Note: This routine is supported for native COBOL only.

Syntax:

call "MFFH_MODIFY_TRACE" using      l-FCD-modifiers

Parameters:

l-FCD-modifiers.

Group item containing:

01 l-FCD-modifiers
   03 1-FCD-mod-enable  pic x comp-x.
   03 l-FCD-mod-flag    pic x(4) comp-x.
reserved pic x(8).

On Entry:

l-FCD-mod-enable

1	Set modifier flag on
2	Set modifier flag off
3	Unset modifier - does not affect FCDs already modified

l-FCD-mod-flag

h"1102"	Modifies the trace bit in fcd-flags-1
h"1808"	Modifies the OPEN/CLOSE trace bit in fcd-fs-flags

On Exit:

None.

Comments:

You must have initialized the File Handler by calling mFFH before you can call MFFH_MODIFY_TRACE (applies to UNIX environments only).

The success of the call can be checked by examining RETURN-CODE.

Once a modification is set up, it is applied to every FCD passing into the File Hander until the modification is cleared.

Examples:

This example enables tracing for all files.

    move 1 to l-FCD-mod-enable
    move h"1102" to l-FCD-mod-flag
    call "MFFH_MODIFY_TRACE" using l-FCD-modifiers.

This example disables tracing for all files.

    move 2 to l-FCD-mod-enable
    move h"1102" to l-FCD-mod-flag
    call "MFFH_MODIFY_TRACE" using l-FCD-modifiers.

This example stops the tracing bit being modified from now on for all files. What was set, stays set.

    move 3 to l-FCD-mod-enable
    move h"1102" to l-FCD-mod-flag 
    call "MFFH_MODIFY_TRACE" using l-FCD-modifiers.

This example enables OPEN/CLOSE tracing for all files.

    move 1 to l-FCD-mod-enable 
    move h"1808" to l-FCD-mod-flag
    call "MFFH_MODIFY_TRACE" using l-FCD-modifiers.