[ILUG] Sed question

[Padraig Brady]

Stephen_Reilly at dell.com wrote:
> <"
> sed -e 's/<[^>]*img/¬<img/g' foo.jsp | #put each <img>...
> tr "¬" "\n" |                          #on a new line.
> sed -n 's/<.*img.*src="\([^"]*\)".*/\1/gp' |
> sort -u
> ">
> 
> hmmm, guess I better stop calling files "¬" ...

true. I wouldn't have to do it if sed recognised c escapes
like I mentioned previously.

> It should really search for
> [\"|\'] rather than just ", to match <img src='image.jpg'>.

Didn't know this was valid syntax. But if so see below..

> Tell me this,
> what's going on in [^"]* ?

Match zero or more characters not a "
i.e. the file name. What happens if you've
a " in the filename? It won't work :-)

sed -e 's/<[^>]*img/¬<img/g' foo.jsp | #put each <img>...
tr "¬" "\n" |                          #on a new line.
sed -n 's/<.*img.*src=["']\([^"']*\)".*/\1/gp' |
sort -u

Padraig.