If the program was compiled with -DREADLINE, the following basic editing functions are available at the program prompt:
^A : moves to the beginning of the line ^B : moves back a single character ^E : moves to the end of the line ^F : moves forward a single character ^K : kills from current position to the end of line ^P or arrow up : moves back through history ^N or arrow down : moves forward through history ^H and DEL : delete the previous character ^D : deletes the current character ^L/^R : redraw line in case it gets trashed ^U : kills the entire line ^W : kills last word
Furthermore you can move within the line using the arrow keys. NOTE:
If you redirect the input for DISCUS using 'discus < infile' you MUST use the command 'set prompt,off' or 'set prompt,redirect' in the first line to avoid that the program 'hangs' at the end of the file. (-> set prompt)