Auxiliary Unit Operations---Rewind

CALL EPRWND (LUNIT,*IBUF*,IERR*)

Rewinds to the start of the current file in use on this unit.

Rewinding an output unit triggers writing the last buffer out and writes an end of file. After a rewind operation (and only in that case) the user may switch from reading to writing or vice versa.

The physical header is reset to the standard header after a rewind.

Input parameters:

LUNIT

logical unit number

Input/Output buffer:

IBUF

user provided unit buffer. Must not be touched by user.

Output parameters:

IERR

error flag. See separate list.

• Note: