[ILUG] Sed question

[Padraig Brady]

Rory Winston wrote:
> Hi,
> 
> I'm trying to use sed to do the following: search through a .jsp file for
> any <img> references, and then generate a bare list of the image filenames.
> So a .jsp page with 3 images inline would generate an output of:
> 
> a.gif
> b.gif
> c.gif
> 
> I'm trying to do it like the following (for this example, I'm ignoring any
> complications due to case and/or whitespace):
> 
> sed -n "/img src=\"/,/\">/p" foo.jsp
> 
> But this doesnt just print out image filenames - it prints out entire lines.
> Has anyone done anything like this already? If anyone has any grep-based
> solutions that would be great too. Correct me if I'm wrong, but is sed (and
> Perl) able to handle certain types of multi-line matching that grep cannot?
> 
> Cheers!
> Rory
> 

How about:
sed -n 's/<.*img.*src="\([^"]*\)".*/\1/gp' foo.jsp
Padraig.