#!/bin/bash -norc

# This procedure renames all files in a directory to names containing
# only lower case characters.

for OLDNAME in `ls`; do
    NEWNAME=`echo $OLDNAME | sed "y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/"`
#   See if file must be renamed.
    if [ $NEWNAME != $OLDNAME ]; then
        if [ ! -e $NEWNAME ]; then
            mv $OLDNAME $NEWNAME
        else
#           The new file name already exists -- don't rename.
            echo "Duplicate file $OLDNAME (could not rename)."
        fi
    fi
done