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Add remove_freem.sh script

#!/usr/bin/env bash

#
#   $Id: remove_freem.sh,v 1.1 2025/05/17 19:35:30 snw Exp $
#    Removes all traces of FreeM from a system, other than
#    startup scripts.
#
#  
#   Author: Serena Willis <snw@coherent-logic.com>
#    Copyright (C) 1998 MUG Deutschland
#    Copyright (C) 2023, 2025 Coherent Logic Development LLC
#
#
#   This file is part of FreeM.
#
#   FreeM is free software: you can redistribute it and/or modify
#   it under the terms of the GNU Affero Public License as published by
#   the Free Software Foundation, either version 3 of the License, or
#   (at your option) any later version.
#
#   FreeM is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU Affero Public License for more details.
#
#   You should have received a copy of the GNU Affero Public License
#   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
#
#   $Log: remove_freem.sh,v $
#   Revision 1.1  2025/05/17 19:35:30  snw
#   Add remove_freem.sh script
#
#
# SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
# SPDX-License-Identifier: AGPL-3.0-or-later
#

PGM="$(basename $0)"

function usage() {

    echo "usage:  ${PGM} <prefix>"
    echo
    echo "    <prefix>"
    echo "      - The root path where FreeM was installed."
    echo
    echo "        If installed from source using the defaults, this will be"
    echo "        /usr/local on most systems."
    echo

    exit 1
    
}

if [[ $# != 1 ]]
then
    usage
fi

if [[ ${EUID} != 0 ]]
then
   echo "${PGM}:  must be run as superuser"
   exit 1
fi

PREFIX=$1

if [[ ! -d "${PREFIX}" ]]
then
    echo "${PREFIX} does not exist."
    exit 1
fi

FM_ETC="${PREFIX}/etc/freem"
FM_VAR="${PREFIX}/var/freem"
FM_FREEM="${PREFIX}/bin/freem"
FM_FMADM="${PREFIX}/bin/fmadm"
FM_LOGDIR="/var/log/freem"

echo "This will remove all FreeM routines, data, configurations, and binaries"
echo "from your system."
echo
echo "THIS CANNOT BE UNDONE!"
echo
echo -n "Are you sure? (y/n) "
read -n 1 YORN
echo

case "${YORN}" in
    y|Y)
        echo "OK, removing all traces of FreeM now..."
        ;;
    *)
        echo
        echo "Doing nothing."
        exit 1
        ;;
esac

echo "Stopping FreeM..."
${FM_FMADM} stop environment
pkill -9 freem
echo "Removing FreeM files..."

rm -rfv ${FM_ETC} ${FM_VAR} ${FM_FREEM} ${FM_FMADM} ${FM_LOGDIR}

echo
echo "FreeM has been removed from your system."
echo
echo "You will need to reinstall from scratch and run 'fmadm configure'"
echo "in order to use it again."
echo