readline: readline (line input library with editing features) readline: readline: The GNU Readline library provides a set of functions for use by readline: applications that allow users to edit command lines as they are typed readline: in. Both Emacs and vi editing modes are available. The Readline readline: library includes additional functions to maintain a list of previously readline: entered command lines, to recall and perhaps edit those lines, and readline: perform csh-like history expansion on previous commands. readline: readline: readline: