Shell Programming and Scripting

Ok guys,

If anyone could help me out on this puppy I'd be very appreciative!

Here's the scenario

I have a string for example :
<img src=BLANK_IMG border=0 width=221 height=12>
or
<img src=IMG border=0 height=12 width=221 >
or anything else really....

need to basically change each one to include alt=""
<img src=IMG alt="" .....yada yada....... >

Every line I need to change is guaranteed to start with "<img" and end with a ">" (of course..) the rest is variable.

Also...for bonus points !!! Those <img tags that DO have the alt="" line already, but in a different position, I want to MOVE IT to be next to the src

eg
move
<img src=IMG border=0 height=12 width=221 alt="">
to
<img src=IMG alt="" border=0 height=12 width=221>


Any ideas?

Thanks!

See this posting with the same type of question - should start you off in the right direction.

Thanks RTM, I saw that posting but that's just a straightforward find/replace statement - I need something that uses a fair bit of logic!

If a super-human sed statement can do it then great! Otherwise it may be a case of writing a program to read word by word, character by charater until it matches a "<img>" then read ahead until ">" ...manipulate the line, then spit it out... or something like that ???......

Of course....I welcome any other *simpler* ideas!

Free your mind ....


Search first for "<img src" - check out the grep/egrep/fgrep commands - any line containing that - search for your blank alt="" statement - use a sed command to remove it.

Then run through and insert your new alt="" by searching/replacing border with alt="" border

test it out on a smaller file so you can see if it all works before hitting all your htm/html files.

sed 's/ alt=""//;s/\(<img src=[^ ]* \)/\1alt="" /g'
or something like that...

Perderabo - that statement is very helpful ! Just need to exclude any line already containing alt"<any text>" ...

Can you help on this?

I don't understand the question. Post some sample data that shows what you actually want.

And clarify something: can't one line have two or more occurances of "<img src=....>"?