Purpose
For zFS TYPE(U) files only, returns the number of storage units actually read after attempting to read
z storage units (bytes) from file
x into location
y.
Parameters
- x
- File reference.
- y
- POINTER- or OFFSET-type expression. For the OFFSET type, the expression must be an OFFSET variable declared with the AREA
attribute.
- z
- Computational-type expression converted to type size_t.