Irssi is an IRC client program originally written by Timo Sirainen, and released under the terms of the GNU General Public License. It is written in the C programming language and in normal operation uses a text-mode user interface. The name "Irssi" comes from the Finnish pronunciation of "IRC", and should be pronounced "ihr-see".

Irssi was written primarily to run on Unix-like operating systems but also runs under Microsoft Windows, using Cygwin. Versions are available for Mac OS X, including a text-mode version using Fink, a native graphical version named MacIrssi and the Cocoa-client Colloquy.

Unlike some text mode IRC clients, Irssi is not based on the ircII code, and was written from scratch. This freed the developers from having to deal with the constraints of an existing codebase, allowing them to maintain tighter control over issues such as security and customization. Numerous modules and Perl scripts made available for Irssi to customise how it looks and operates.

Irssi may be configured using the user interface, or if necessary, by manually editing the configuration files, which use a syntax resembling Perl data structures.

In May 2002 Irssi's autoconf "configure" script was found to have been backdoored for two months, the binary was never backdoored - only the script, and the problem was immediately fixed. ^*

See also

• List of IRC clients
• Comparison of IRC clients
• Colloquy (IRC client)—Mac OS X GUI Irssi based client

External links

• Official website
• Freshmeat project page
• MacIrssi's home page
• Cygwin/Windows binaries
• Unofficial Irssi Documentation and Resources

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