cio

cio--pronounced "cheo"--is a simple, hackable, curses irc client.

Download

• cio 1.1 (13KB) (2026-05-01)
• LICENSE

Motivation

cio is developed to be allergic to "feature creep." cio should not contain any features which promote needless complexity or cater to very specific use cases. Instead cio aims to be a sensible base to be extended upon.

cio acheives this in the following ways:

• cio itself is one C99 file around ~1000 CLOC
• cio does not bother to implement every possible IRC spec
• optional features are kept within the "patches" directory"

Features

So what features does cio implement?

• TLS
• UTF-8
• wide-character support
• infinite scrollback
• emacs-like line editing
• logging
• resize

History

cio is a fork of irc.c written by Quentin Carbonneaux.