preinst

#!/bin/bash

csudo=""
if command -v sudo > /dev/null; then
    csudo="sudo"
fi

function is_using_systemd() {
    if pidof systemd &> /dev/null; then
        return 0
    else
        return 1
    fi
}

# Stop the service if running
if pidof taosd &> /dev/null; then
    if is_using_systemd; then
        ${csudo} systemctl stop taosd || :
    else
        ${csudo} service taosd stop || :
    fi
    echo "Stop taosd service success!"
    sleep 1
fi

# if taos.cfg already softlink, remove it
cfg_install_dir="/etc/taos"
install_main_dir="/usr/local/taos"
if [ -f ${cfg_install_dir}/taos.cfg ]; then
    ${csudo} rm -f ${install_main_dir}/cfg/taos.cfg   || :
fi    

${csudo} dpkg -P tdengine   || :
${csudo} rm -f /var/lib/dpkg/info/tdengine*   || :