#! /bin/sh -u

if [ $# -lt 1 ]; then
  echo "Usage: `basename $0` <logfile>." 1>&2
  exit 1
fi

LOG=$1

find_sort(){
 echo "-- ${1}"
 grep -e "${1}" "${LOG}" | sed -e 's%^.*'"${1}"'%%' | sort -n -u
}

find_sort ' Error '
echo
find_sort ' Warning '
echo
find_sort ' Info '