hex2ip.sh

#!/bin/bash
# Create: 2014-03-12 John C. Petrucci
# Modify: 2014-03-13 John C. Petrucci
# http://johncpetrucci.com
# Purpose: See usage()
# Usage: See usage()
usage (){
cat <<EOF
 
$(basename $0) - Converts hexadecimal to IP addresses.
    Accepts a file as first argument or as stdin.
    Examples:
        ./$(basename $0) file.log
        cat file1.log file2.log | ./$(basename $0)
 
EOF
}
#     one arg  && is file    OR      no args      OR              print error message,                       usage,      and quit
( [[ "$#" == 1 && -f "$1" ]] || [[ "$#" == 0 ]] ) || { printf '%s: %s\n' "File not valid" "${1:-(stdin)}" >&2; usage >&2; exit 1; }
 
while IFS= read -r line
do
    declare -a iparray
    iparray=("${iparray[@]}" "$((grep -Eoi "([a-f0-9]{8})" <<<$line | fold -w2) | while read a; read b; read c; read d; do printf ' [%d.%d.%d.%d]' "0x$a" "0x$b" "0x$c" "0x$d"; done)" ) 
    printf "%s%s\n" \
    "$(cat <<<$line)" \
    "${iparray[*]}"
    unset iparray
done < "${1:-/proc/self/fd/0}"