#!/bin/bash
#
# chronyd <summary>
#
# chkconfig:   - 58 74
# description: Client/server for the Network Time Protocol, \
#              this program keeps your computer's clock accurate.

### BEGIN INIT INFO
# Provides: chronyd
# Required-Start: $network $local_fs $remote_fs
# Required-Stop: 
# Should-Start: $syslog $named
# Should-Stop: $syslog
# Short-Description: NTP client/server
# Description: Client/server for the Network Time Protocol,
#              this program keeps your computer's clock accurate.
### END INIT INFO

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

exec=/usr/sbin/chronyd
prog=chronyd
config=/etc/chrony.conf
keyfile=/etc/chrony.keys
chronyc=/usr/bin/chronyc

[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog

lockfile=/var/lock/subsys/$prog

get_key() {
    awk '/^[ \t]*'$1'\>/ { print $2; exit }' < $keyfile
}

get_commandkeyid() {
    awk '/^[ \t]*commandkey\>/ { keyid=$2 } END { print keyid }' < $config
}

chrony_command() {
    commandkeyid=$(get_commandkeyid)
    [ -z "$commandkeyid" ] && return 1
    commandkey=$(get_key $commandkeyid)
    [ -z "$commandkey" ] && return 2

    ! (
        $chronyc <<EOF &
password $commandkey
$1
EOF
        chronycpid=$!

        # chronyc will hang if the daemon doesn't respond, kill it after 3 s 
        (sleep 3; kill $chronycpid) < /dev/null &> /dev/null &
        killerpid=$!

        wait $chronycpid &> /dev/null
        kill $killerpid &> /dev/null || echo "chronyd not responding"
    ) | grep -v '200 OK'
}

generate_commandkey() {
    commandkeyid=$(get_commandkeyid)
    [ -z "$commandkeyid" ] && return 1
    commandkey=$(get_key $commandkeyid)
    [ -z "$commandkey" ] || return 0

    echo -n $"Generating chrony command key: "
    commandkey=$(tr -c -d '[\041-\176]' < /dev/urandom | head -c 8)
    [ -n "$commandkey" ] && echo "$commandkeyid $commandkey" >> $keyfile &&
        success || failure
    echo
}

start() {
    [ "$NETWORKING" = "no" ] && exit 1
    [ -x $exec ] || exit 5
    [ -f $config ] || exit 6
    generate_commandkey
    echo -n $"Starting $prog: "
    daemon $exec $OPTIONS
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}

stop() {
    echo -n $"Stopping $prog: "
    killproc $prog
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}

restart() {
    stop
    start
}

reload() {
    restart
}

force_reload() {
    restart
}

rh_status() {
    status $prog
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}


case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart)
        $1
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    force-reload)
        force_reload
        ;;
    status)
        rh_status
        ;;
    condrestart|try-restart)
        rh_status_q || exit 0
        restart
        ;;
    online|offline|cyclelogs)
        rh_status_q || exit 7
        chrony_command $1
        ;;
    command)
        rh_status_q || exit 7
        chrony_command "$2"
        ;;
    *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|cyclelogs|online|offline|command}"
        exit 2
esac
exit $?