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The iceauth program is used to edit and display the authorization information used in connecting with ICE (the X11 Inter-Client Exchange protocol). It operates very much like the xauth program for X11 connection authentication records.
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.x.org/mailman/listinfo/xorg
The primary development code repository can be found at:
https://gitlab.freedesktop.org/xorg/app/iceauth
Please submit bug reports and requests to merge patches there.
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches