turn all filenames in $PWD to lowercase recursively

tolower.sh

#!/bin/sh
if [ -z "$1" ] ; then
	WD=.
else
	WD="$1"
fi
lower=

lowercase()
{
	lower="$(echo `basename "$1"` | tr '[A-Z]' '[a-z]')"
	mv -v "`dirname "$1"`/`basename "$1"`" "`dirname "$1"`/$lower"
	if [ $? -gt 0 ] ; then
		echo "error lowercasing $1"
		exit
	fi
}

# grep for directory separator '/' to not include '.'
for f in `find -d "$WD" | grep '/'`; do
	lowercase "$f"
done