#!/bin/ksh
#
# prndg           This shell script takes care of starting and stopping
#                 prndg (Pseudo Random Number Generator Daemon).
#
# chkconfig: - 55 45
# description: Pseudo Random Number Generator Daemon
# Authomatical startup script. Howto install and use it:
# - configure prngd to have config file in /etc/prngd.d/prngd.conf and seed
#   in /etc/prngd.d/prngd-seed, compile it and put binary into /usr/local/bin
# - install prngd.rc.osr5 file as /etc/prngd.d/prngd.rc
# - run /etc/prngd.d/prngd.rc enable
# - /etc/prngd.d/prngd.rc along without arguments gives brief help
#

daemon_user='prngd'
root_dir="/usr/local"
bin_dir="$root_dir/sbin"
sbin_dir="$bin_dir"
etc_dir="/usr/local/etc/prngd"
run_dir="$root_dir/var/prngd"
log_dir="$run_dir"
log_file="$log_dir/prngd.log"
daemon_file="$sbin_dir/prngd"
conf_file="$etc_dir/prngd.conf"
sock_file="$run_dir/prngd-pool"
lock_file="$run_dir/prngd.lock"
rc_file="/etc/init.d/prngd"
srcscript="/etc/rc2.d/S90prngd"
krcscript="/etc/rc0.d/K87prngd"
add_path="$bin_dir"

# environment check
[ -f "$daemon_file" ] || exit 0

[ -f "$conf_file" ] || exit 0

if echo "$PATH" | fgrep -q "$add_path"
then
  echo -n
else
  PATH="$add_path:$PATH"
  export PATH
fi

RETVAL=0

# See how we were called.
case "$1" in
  'start'|restart)
    # Start daemons.
    $0 stop
    echo "Starting prngd: \c"
    su "$daemon_user" -c "$daemon_file $sock_file" > "$log_file" 2>&1
    RETVAL=$?
    if [ "$RETVAL" -eq 0 ]
    then
      touch "$lock_file"
    fi
    echo
  ;;
  'stop')
    # Stop daemons.
    echo "Shutting down prngd: \c"
    "$daemon_file" --kill "$sock_file"
    rm -f "$lock_file"
    echo
  ;;
  'enable')
    if [ -h $srcscript ] ; then
       echo "prngd is already enabled."
    else
       echo "Enabling prngd ... \c"
       rm -f "$srcscript" "$krcscript"
       ln -s "$rc_file" $srcscript
       ln -s "$rc_file" $krcscript
       echo "Done"
    fi
  ;;
  'disable')
    echo "Disabling prngd ... \c"
    rm -f "$srcscript" "$krcscript"
    echo "Done"
  ;;
  *)
    echo "Usage: prngd.rc {start|stop|restart|enable|disable}"
    exit 1
  ;;
esac

exit $RETVAL