/usr/sbin/unregister-common-lisp-implementation is in common-lisp-controller 7.10+nmu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #!/bin/sh
# Copyright (C) 2000,2004 Peter Van Eynde and Kevin M. Rosenberg
# Licensed under the LLGPL, see debian/copyright file
# just nuke all caches of this implementation
HOME=/tmp/
LANG=C
LC_ALL=C
export HOME LANG LC_ALL
umask 0022
implementation="$1"
echo "$implementation" | grep -q '[^a-zA-Z0-9._+-]' && echo "Found special characters in $1!" && exit 42
echo "$implementation" | grep -q '\.\.' && echo "Found .. in $1!" && exit 1
echo "$implementation" | grep -q '\/\/' && echo "Found // in $1!" && exit 2
rm -rf /var/cache/common-lisp-controller/*
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