NM and CM callable.
Operation Notes |
 |
The FREADSEEK intrinsic enhances direct access of disk files.
When a certain record is required, use FREADSEEK before
a call to FREADDIR to transfer it to the stack.
The FREADSEEK intrinsic directs
the operating system to move the record from
disk into a buffer in anticipation of the FREADDIR call, which
moves the record directly to the stack.
Issue the FREADSEEK intrinsic call only for direct-access
files where I/O buffering and fixed-length or
undefined-length records are in effect.
FREADSEEK fails with a CCL condition code when filenum
references a NOBUF file. Byte stream files are opened NOBUF,
and not applicable to FREADSEEK intrinsic.
Not applicable to message files.
(KSAM) This intrinsic cannot be used for KSAM files. If called for
a file created as a KSAM file, CCL (1) is returned.
