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POOne more greedy sed question
 

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  1. POOne more greedy sed question
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    <p>I'm doing an automated download of a number of images using an html frame source. So fra, so good, Sed, wget. Example of the frame source:</p> <pre><code>&lt;td width="25%" align="center" valign="top"&gt;&lt;a href="images/display.htm?concept_Core.jpg"&gt;&lt;img border="1" src="t_core.gif" width="120" height="90"&gt;&lt;font size="1" face="Verdana"&gt;&lt;br&gt;Hyperspace Core&lt;br&gt;(Rob Cunningham)&lt;/font&gt;&lt;/a&gt;&lt;/td&gt; </code></pre> <p>So I do this:</p> <pre><code>sed -n -e 's/^.*htm?\(.*jpg\).*$/\1/p' concept.htm </code></pre> <p>to get the part which looks like this:</p> <pre><code>concept_Core.jpg </code></pre> <p>to do then this:</p> <p>wget --base=/some/url/concept_Core.jpg</p> <p>But there is one nasty line. That line, obvioulsy, is a bug in the site, or whatever it can be, but it is wrong, I can't change it, however. ;)</p> <pre><code>&lt;td width="25%" bla bla face="Verdana"&gt;&lt;a href="images/display.htm?concept_frigate16.jpg" target="_top"&gt;&lt;img bla bla href="images/concept_frigate16.jpg" target="_top"&gt;&lt;br&gt;Frigate 16&lt;br&gt; </code></pre> <p>That is, two of these "<strong>concept_Frigate16.jpg</strong>" in a line. And my script gives me</p> <pre><code>concept_frigate16.jpg" target="_top"&gt;&lt;img border="1" src="t_assaultfrigate.gif" width="120" height="90" alt="The '16' in the name may be a Sierra typo."&gt;&lt;/a&gt;&lt;a href="images/concept_frigate16.jpg </code></pre> <p>You understand why. Sed is greedy and this obviously shows up in this case.</p> <p><em>Now the question is, how do I get rid of this corner case? That is, make it non-greedy and make it stop on the FIRST <strong>.jpg?</em></strong><em>emphasized text</em></p>
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