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LVIII. GNU Readline

The readline() functions implement an interface to the GNU Readline library. These are functions that provide editable command lines. An example being the way Bash allows you to use the arrow keys to insert characters or scroll through command history. Because of the interactive nature of this library, it will be of little use for writing Web applications, but may be useful when writing scripts meant to be run from a shell.

The home page of the GNU Readline project is It's maintained by Chet Ramey, who's also the author of Bash.

Table of Contents
readline — Reads a line
readline_add_history — Adds a line to the history
readline_clear_history — Clears the history
readline_completion_function — Registers a completion function
readline_info — Gets/sets various internal readline variables
readline_list_history — Lists the history
readline_read_history — Reads the history
readline_write_history — Writes the history