entropyfd init script

#!/bin/bash
#
# entropyfd: gathers entropy from another host via tcp
### BEGIN INIT INFO
# Provides: entropyfd
# Required-Start: $network
# Required-Stop: $network
# Default-Start: 3
# Default-Stop:
# Description: entropyfd
# Short-Description: gathers entropy from another host via tcp
### END INIT INFO
#
# - originally written by Henri Gomez, Keith Irwin, and Nicolas Mailhot
# - heavily rewritten by Deepak Bhole and Jason Corley
#

# Get instance specific config file
if [ -r "/etc/sysconfig/entropyfd" ]; then
    . /etc/sysconfig/entropyfd
fi

# Source function library.
INITD=/etc/rc.d/init.d
. $INITD/functions

# Set the game server pid file
ENTROPYFD_PID="/var/run/entropyfd.pid"

script_result=0

function checkpid() {
    local i
    for i in $* ; do
        if [ -d "/proc/${i}" ]; then
            return 0
        fi
    done
    return 1
}

function start() {
    ENTROPYFD_START=$"Starting entropyfd service: "
    if [ -f "/var/lock/subsys/entropyfd" ] ; then
        if [ -f "$ENTROPYFD_PID" ]; then
            read kpid < $ENTROPYFD_PID
                if checkpid $kpid 2>&1; then
                    echo
                    echo "Process already running"
                    echo_failure
                    exit 1
                    echo
                else
                    echo
                    echo "lock file found but no process running for"
                    echo "pid $kpid, continuing"
                fi
        fi
    fi

    echo -n "$ENTROPYFD_START"

#    /usr/bin/nc -n $ENTROPYFD_HOST $ENTROPYFD_PORT |/sbin/rngd -f -r /dev/stdin 2>&1|/usr/bin/logger -t entropyfd
    /usr/bin/nc -n $ENTROPYFD_HOST $ENTROPYFD_PORT |/sbin/rngd -f -r /dev/stdin 2>&1

    RETVAL="$?"
    if [ "$RETVAL" -eq 0 ]; then
        success "$ENTROPYFD_START"
        echo
        if [ ! -z "$ENTROPYFD_PID" ]; then
          echo $! > $ENTROPYFD_PID
        fi
        touch /var/lock/subsys/entropyfd
    else
        failure "$ENTROPYFD_START"
        echo
        script_result=1
    fi
}

function stop() {
    echo -n "Stopping entropyfd service: "
    if [ -f "/var/lock/subsys/entropyfd" ]; then
        kill $ENTROPYFD_PID
        RETVAL="$?"
        if [ "$RETVAL" -eq "0" ]; then
            rm -f /var/lock/subsys/entropyfd $ENTROPYFD_PID
            echo_success
        else
            echo_failure
        fi
        echo
    fi
}

function status() {
    RETVAL="1"
    if [ -f "$ENTROPYFD_PID" ]; then
        read kpid < $ENTROPYFD_PID
        if checkpid $kpid 2>&1; then
            echo "entropyfd is already running (${kpid})"
            RETVAL="0"
        else
            echo "lock file found but no process running for pid $kpid"
        fi
    else
        pid="$(/usr/bin/pgrep /sbin/rngd)"
        if [ -n "$pid" ]; then
            echo "$0 running (${pid}) but no PID file exists"
            RETVAL="0"
        else
            echo "$0 is stopped"
        fi
    fi
    return $RETVAL
}

# See how we were called.
case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        sleep 2
        start
        ;;
    status)
        status
        ;;
    *)
        echo -n "Usage: entropyfd "
        echo "{start|stop|restart|status}"
        exit 1
esac

exit $script_result