- open-input-file* FILENO #!optional OPENMODEprocedure
- open-output-file* FILENO #!optional OPENMODEprocedure
Opens file for the file-descriptor FILENO for input or output and returns a port. FILENO should be a positive exact integer. OPENMODE specifies an additional mode for opening the file (currently only the keyword #:append is supported, which opens an output-file for appending).