Bing wallpaper downloader

bing_wallpaper.sh

#!/usr/bin/env sh
LOC="en-US"

for RES in _1920x1200 _1366x768 _1280x720 _1024x768; do
    XML="http://www.bing.com/HPImageArchive.aspx?format=xml&idx=0&n=1&mkt=${LOC}"
    URL="http://www.bing.com$(echo $(curl -s ${XML}) | grep -oP "<urlBase>(.*)</urlBase>" | cut -d ">" -f 2 | cut -d "<" -f 1)${RES}.jpg"
    IMG=${URL##*/}

    curl -s -o /tmp/$IMG $URL
    file /tmp/$IMG | grep -i HTML && rm -rf /tmp/$IMG && continue
    break
done