Get image URL not permalink

Hello,

Have a look at this bit of code;

function getImage($num) {
global $more;
$more = 1;
$link = get_permalink();
$content = get_the_content();
$count = substr_count($content, ‘<img’);
$start = 0;

How do I change this $link = get_permalink(); so that it doesnt link the image to the permalink, but instead links to the URL that I type when the picture is uploaded in a new post.

This isnt all the code; what it does is it gets the first image in a post.