A shell script to normalize the month field in the given date

 

 This script will normalize the month field in the given date to three letters and the first letter would be capitalized.

#!/bin/sh # normdate - Normalizes month field in date specification # to three letters, first letter capitalized. # Exits w/ zero if no error. monthnoToName() { # sets the variable 'month' to the appropriate value case $1 in 1 ) month="Jan" ;; 2 ) month="Feb" ;; 3 ) month="Mar" ;; 4 ) month="Apr" ;; 5 ) month="May" ;; 6 ) month="Jun" ;; 7 ) month="Jul" ;; 8 ) month="Aug" ;; 9 ) month="Sep" ;; 10) month="Oct" ;; 11) month="Nov" ;; 12) month="Dec" ;; * ) echo "$0: Unknown numeric month value $1" >&2; exit 1 esac return 0 } ## Begin main script if [ $# -eq 1 ] ; then # try to compensate for / or - formats set -- $(echo $1 | sed 's/[\/\-]/ /g') fi if [ $# -ne 3 ] ; then echo "Usage: $0 month day year" >&2 echo "Typical input formats are August 3 1962 and 8 3 2002" >&2 exit 1 fi if [ $3 -lt 99 ] ; then echo "$0: expected four-digit year value." >&2; exit 1 fi if [ -z $(echo $1|sed 's/[[:digit:]]//g') ]; then monthnoToName $1 else # normalize to first three letters, first upper, rest lowercase month="$(echo $1|cut -c1|tr '[:lower:]' '[:upper:]')" month="$month$(echo $1|cut -c2-3 | tr '[:upper:]' '[:lower:]')" fi echo $month $2 $3 exit 0