If $dir is a mount point this if statement will determine is (Not tested)
if [ `stat -fc%t:%T "$dir"` != `stat -fc%t:%T "$dir/.."` ]; then
echo "$dir is mounted"
else
echo "$dir is not mounted"
fi
If $dir is a mount point this if statement will determine is (Not tested)
if [ `stat -fc%t:%T "$dir"` != `stat -fc%t:%T "$dir/.."` ]; then
echo "$dir is mounted"
else
echo "$dir is not mounted"
fi