ディレクトリのコピーではなく、ディレクトリ内のすべてのファイルを削除する

#!/bin/bash

infosdir="foo/infos"
imagesdir="foo/images"

# use a different IFS to allow spaces in filenames
IFS=$(echo -en "\n\b")

# for all images in the images-directory
for pngfullname in ${imagesdir}/*.png; do
 # get the name of the image without the path and without the file-extension
 basename="$(basename ${pngfullname} .png)"
 # if an appropriate xml-file in the infos-directory is missing
 if [ ! -f "${infosdir}/${basename}.xml" ] ; then
   # delete the image
   rm "${pngfullname}"
 fi
done