gdb: I/O Ports in Guile

 
 23.3.3.23 I/O Ports in Guile
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  -- Scheme Procedure: input-port
      Return GDB's input port as a Guile port object.
 
  -- Scheme Procedure: output-port
      Return GDB's output port as a Guile port object.
 
  -- Scheme Procedure: error-port
      Return GDB's error port as a Guile port object.
 
  -- Scheme Procedure: stdio-port? object
      Return '#t' if OBJECT is a GDB stdio port.  Otherwise return '#f'.