Shell Programming and Scripting

#!/bin/ksh

# We use a function, so overwriting $1 $2 ... won't affect anything outside
function checkfile {
        dir="$1"
        set -- "${2}"* # Match one or more files, placing in local $1 $2 ...
        if [ ! -f "${1}" ]
        then
                echo "${1} not found" >&2
                return 1
        fi

        echo mv "${1}" "${1}_${dir}"
}

while IFS=", " read dir filename # Split input upon spaces and commas
do
        # Skip lines where filename doesn't match the argument given.
        [ "$1" = "$filename" ] || continue
        # call checkfile.  Inside checkfile, $1=$dir and $2=$filename
        checkfile "$dir" "$filename"
done<masterfile