The BUFFERED specifier asks whether run-time buffering is in effect. It takes the following form:
BUFFERED = bf
bf
Is a scalar default character variable that is assigned one of the following values:
'NO' | If the file or unit is connected and buffering is not in effect. |
'YES' | If the file or unit is connected and buffering is in effect. |
'UNKNOWN' | If the file or unit is not connected. |