188 lines
3.8 KiB
Bash
Executable File
188 lines
3.8 KiB
Bash
Executable File
#!/usr/bin/env bash
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check_string_ps=""
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if [[ -f "/usr/sbin/named" ]] ; then
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check_string_ps="/usr/sbin/named"
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fi
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alternate_addr="oopen.de google.com heise.de debian.org ubuntu.com"
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# - used, if systemd is NOT supported
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bind_init_script=""
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if [[ -x "/etc/init.d/bind9" ]] ; then
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bind_init_script="/etc/init.d/bind9"
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fi
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# - Used if systemd is supported
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# -
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service_name=bind9
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LOCK_DIR=`mktemp -d`
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#---------------------------------------
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#-----------------------------
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# Base Function(s)
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#-----------------------------
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#---------------------------------------
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fatal(){
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echo ""
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echo -e " [ Fatal ] $*"
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echo ""
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echo -e "\tScript terminated.."
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echo ""
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rm -rf $LOCK_DIR
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exit 1
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}
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error (){
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echo ""
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echo -e " [ Error ] $*"
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echo ""
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}
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warn (){
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echo ""
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echo -e " [ Warn ] $*"
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echo ""
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}
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info (){
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echo ""
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echo -e " [ Info ] $*"
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echo ""
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}
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ok (){
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echo ""
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echo -e " [ Ok ] $*"
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echo ""
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}
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trim() {
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local var="$*"
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var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
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var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
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echo -n "$var"
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}
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#---------------------------------------
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#-----------------------------
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# Check some prerequisites
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#-----------------------------
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#---------------------------------------
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# - Running in a terminal?
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# -
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if [[ -t 1 ]] ; then
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terminal=true
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LOGGING=true
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else
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terminal=false
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LOGGING=false
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fi
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# - Running in a terminal?
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# -
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if [[ -t 1 ]] ; then
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terminal=true
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LOGGING=true
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else
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terminal=false
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LOGGING=false
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fi
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if [[ -z $check_string_ps ]]; then
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fatal "$(basename $0): Bind Nameservice seems NOT to be installed"
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fi
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# - Systemd supported ?
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# -
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systemd=$(which systemd)
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systemctl=$(which systemctl)
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systemd_supported=false
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if [[ -n "$systemd" ]] && [[ -n "$systemctl" ]] ; then
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systemd_supported=true
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else
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if [[ ! -x $bind_init_script ]]; then
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fatal "$(basename $0): Missing Bind Init-Script!"
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fi
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fi
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#---------------------------------------
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#-----------------------------
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# Check if Bind Nameservice is running
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#-----------------------------
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#---------------------------------------
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if $LOGGING ; then
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echo -e "\n Check if Bind Nameservice is running.."
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echo -e " ======================================"
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fi
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for ip_addr in $alternate_addr ; do
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ping -c3 $ip_addr >> /dev/null 2>&1
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if [ $? -eq 0 ]; then
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PID=$(ps -e f | grep -E "[[:digit:]]\ ${check_string_ps}"| grep -v grep | awk '{print$2}')
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if [[ "X${PID}" = "X" ]]; then
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break
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else
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if $LOGGING ; then
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ok "Bind Nameservice is up and running."
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fi
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exit 0
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fi
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fi
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done;
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error "Bind Nameservice seems to be down! Trying to restart service now.."
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if $systemd_supported ; then
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$systemctl stop $service_name > /dev/null 2> ${LOCK_DIR}/err_msg.log
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if [[ $? -ne 0 ]]; then
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error "$(cat ${LOCK_DIR}/err_msg.log)"
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fi
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sleep 10
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$systemctl start $service_name > /dev/null 2> ${LOCK_DIR}/err_msg.log
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if [[ $? -ne 0 ]]; then
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error "$(cat ${LOCK_DIR}/err_msg.log)"
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fi
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else
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$bind_init_script stop > /dev/null 2>&1
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if [[ $? -ne 0 ]]; then
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error "Stopping Bind Nameservice failed!"
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fi
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sleep 10
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$bind_init_script start > /dev/null 2>&1
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if [[ $? -ne 0 ]]; then
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error "Starting Bind Nameservice failed!"
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fi
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fi
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declare -i counter=0
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PID=$(ps -e f | grep -E "[[:digit:]]\ ${check_string_ps}"| grep -v grep | awk '{print$2}')
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while [[ "X${PID}" = "X" ]]; do
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sleep 1
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PID=$(ps -e f | grep -E "[[:digit:]]\ ${check_string_ps}"| grep -v grep | awk '{print$2}')
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if [[ $counter -gt 10 ]]; then
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break
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else
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((counter++))
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fi
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done
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if [[ "X${PID}" = "X" ]] ; then
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error "Restarting Bind Nameservice failed!"
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else
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ok "Bind Nameservice is up and running."
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fi
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exit 0;
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