Radix cross Linux

#!/bin/bash
#
# /etc/rc.d/rc.opendkim    Start and stop OpenDKIM.
#
# OpenDKIM startup script for Slackware 14.1 by Gerardo Zamudio
# Modified from the  script by Steve Jenkins (SteveJenkins.com) - 10-29-2012
# Based on a script by Andrew Colin Kissa (TopDog) for dkim-milter - 05-28-2009
#

USER="opendkim"
PROGRAM=/usr/sbin/opendkim
CONF_FILE=/etc/opendkim.conf
PID_FILE=/var/run/opendkim/opendkim.pid
KEYGEN=/usr/sbin/opendkim-genkey
DKIM_KEYDIR=/etc/opendkim/keys
DKIM_SELECTOR=default
AUTOCREATE_DKIM_KEYS=yes

do_dkim_keygen() {
  if [ ! -s $DKIM_KEYDIR/$DKIM_SELECTOR.private ]; then
    echo -n $"Generating default DKIM keys: "
    if [ "x$(hostname -d)" = "x" ]; then
      echo $"Cannot determine host's domain name, so skipping default key generation."
    else
      mkdir -p $DKIM_KEYDIR
      $KEYGEN -b 2048 -D $DKIM_KEYDIR -s $DKIM_SELECTOR -d "$(hostname -d)"
      chown root:$USER $DKIM_KEYDIR
      chown $USER:$USER $DKIM_KEYDIR/$DKIM_SELECTOR.{private,txt}
      chmod 600 $DKIM_KEYDIR/$DKIM_SELECTOR.private
      chmod 644 $DKIM_KEYDIR/$DKIM_SELECTOR.txt
      echo
      echo Default DKIM keys for "$(hostname -d)" created in $DKIM_KEYDIR.
    fi
  fi
}

case "$1" in
  start)
    # Create keys if necessary
    if [ "x${AUTOCREATE_DKIM_KEYS}" != xNO ]; then
      do_dkim_keygen
    fi

    echo -n $"Starting OpenDKIM Milter... "
    echo
    if [ -f $PID_FILE ]; then
      PID=$(cat $PID_FILE)
      echo OpenDKIM already running as pid "$PID"
      exit 2;
    else
      $PROGRAM -l -x $CONF_FILE -P $PID_FILE
    fi
    ;;
  stop)
    echo -n $"Stopping OpenDKIM Milter... "
    echo
    if [ ! -f $PID_FILE ]; then
      echo OpenDKIM is not running!
      exit 2;
    else
      kill -TERM "$(cat $PID_FILE)" && rm -rf $PID_FILE
    fi
    ;;
  status)
    if [ -f $PID_FILE ]; then
      PID=$(cat $PID_FILE)
      echo OpenDKIM already running as pid "$PID"
      exit 2;
    else
      echo OpenDKIM is not running!
    fi
    ;;
  *)
    echo $"Usage: $0 {start|stop|status|}"
    exit 1
esac