Bash script to upload screenshot to imgur.com

#!/bin/sh
if [ ! -f imgurbash.sh ]; then
wget http://imgur.com/tools/imgurbash.sh
fi
result=$(uname -a | grep -i -c bsd)
if [ $result -gt 0 ]; then
$(sed  's/sed -r/sed -E/g' imgurbash.sh  > /tmp/imgurbash.tmp; mv /tmp/imgurbash.tmp imgurbash.sh)
fi
filename="screenshot-$(date +%s).png"
import -window root $filename
bash imgurbash.sh $filename