list version differences in package version for yum update

yum-updinfo-3.sh

#!/bin/bash

# based on
# http://arstechnica.com/civis/viewtopic.php?f=16&t=1081335

echo \"package name\",\"current version\",\"update version\"
yum -q check-update| while read i
do
    i=$(echo $i) #this strips off yum's irritating use of whitespace
    if [ "${i}x" != "x" ]
    then
        UVERSION=${i#*\ }
        UVERSION=${UVERSION%\ *}
        PNAME=${i%%\ *}
        PNAME=${PNAME%.*}
        VERSION=$(rpm -q "${PNAME}" --qf '%{VERSION}-%{RELEASE}')
	printf "%-30s\n%60s\n%60s\n\n" "$PNAME" "$VERSION" "$UVERSION"
    fi
done