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Finish Linux branch of install script

#!/usr/bin/env bash

#
#   $Id: freem-install.sh,v 1.2 2025/05/06 13:28:16 snw Exp $
#    FreeM source installer
#
#  
#   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: freem-install.sh,v $
#   Revision 1.2  2025/05/06 13:28:16  snw
#   Finish Linux branch of install script
#
#   Revision 1.1  2025/05/06 13:21:20  snw
#   Add installer script
#
#
# SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
# SPDX-License-Identifier: AGPL-3.0-or-later
#

YN=no

function yorn()
{
    local prompt="$1"
    local result=""
    
    echo -n "${prompt} (y/n): "
    read -n1 result
    echo ""
    
    case "${result}" in
        y|Y)
            YN=y
            ;;
        n|N)
            YN=n
            ;;
        *)
            echo "${result} is not a valid response. Please answer 'y' or 'n'."
            yorn "${prompt}"
            ;;
    esac
}

OS=$(uname)
PGM=$(basename $0)

if [[ $EUID != 0 ]]
then
    yorn "Does your account have sudo privileges?"
    if [[ "${YN}" != "y" ]]
    then
        echo "${PGM}:  must have sudo privileges to install FreeM"
        exit 1
    fi
else
    echo "${PGM}:  cannot install from superuser account; use your normal user account"
    exit 1
fi


case ${OS} in

    Linux)
        FM_AGEN="./autogen.sh"
        FM_CONF="./configure"
        FM_MAKE="make -j"
        FM_MAKEINST="sudo make install"
        FM_ADDGRP="sudo groupadd freem"
        FM_ADDUSER="sudo useradd -r -g freem freem"
        FM_CHKGRP=$(id -Gn | grep freem | wc -l)
        FM_FIXGRP="sudo usermod -aG freem ${LOGNAME}"
        ;;

    *)
        echo "${PGM}:  ${OS} is not supported"
        exit 1
        ;;
    
esac

$FM_AGEN
$FM_CONF
$FM_MAKE
$FM_MAKEINST

HAVEGRP=$(cat /etc/group | egrep '^freem' | wc -l)
if [[ ${HAVEGRP} > 0 ]]
then
    echo "${PGM}:  already have 'freem' group"
else
    echo "${PGM}:  adding 'freem' group"
    $FM_ADDGRP
fi

HAVEUSR=$(cat /etc/passwd | egrep '^freem' | wc -l)
if [[ ${HAVEUSR} > 0 ]]
then
    echo "${PGM}:  already have 'freem' user"
else
    echo "${PGM}:  adding 'freem' user"
    $FM_ADDUSER
fi

if [[ $FM_CHKGRP > 0 ]]
then
    GRPMSG="${PGM}:  type 'freem' to run FreeM"
    echo "${PGM}:  ${LOGNAME} is already in the 'freem' group"
else
    GRPMSG="${PGM}:  you will need to log out and back in to run FreeM"
    echo "${PGM}:  adding ${LOGNAME} to the 'freem' group"
    $FM_FIXGRP    
fi

sudo /usr/local/bin/fmadm configure

echo "${GRPMSG}"