Oracle SysV script

#!/bin/sh
# description: Start/stop script for the Oracle 12c service
#              11/2017 [lmuniz@lmunix.net]
# chkconfig:   345 97 03
#
: ${CTLFILE:="/var/lock/subsys/ora_*_orcl"}
: ${ORACLE_HOME:="/u01/app/oracle/product/12.2.0/dbhome_1"}
: ${ORAUSER:="oracle"}

start() { [ "$(id -u)" -eq 0 ] || { echo "You need to be root" 1>&2; exit 2; }
          touch ${CTLFILE}; su ${ORAUSER} -c "${ORACLE_HOME}/bin/dbstart ${ORACLE_HOME}"
}

status() {
    if [ "$(ps -ef | grep "ora_" | grep -v "grep" | wc -l)" -gt 0 ]
       then echo "Oracle is running"
       else echo "Oracle is not running"
    fi
}

stop()  { [ "$(id -u)" -eq 0 ] || { echo "You need to be root" 1>&2; exit 2; }
          rm -f ${CTLFILE}; su ${ORAUSER} -c "${ORACLE_HOME}/bin/dbshut ${ORACLE_HOME}"
}

usage() { echo "Usage: $(basename $0) {start|stop|status|restart|reload}" 1>&2; exit 2
}

case $1 in
  start)  start ;;
  stop)   stop ;;
  status) status ;;
  restart |\
  reload) stop; start;;
  *)      usage;;
esac