printing in shell

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# 1  
Old 05-02-2002
Question printing in shell

i need to get this done for college and am having troyble getting the comma removed at the last email address and also if there is no email address i get a space instead of nothing, the question is below so if anyone has an idea how to do it could they help me also u cannot use perl

Background: In a web page, an email link like:

Mail me!
is written as the HTML code:

<a href="mailto:user@domain"> Mail me! </a>
or, for multiple addresses on the same button:

<a href="mailto:user@domain,user@domain"> Mail me! </a>
The script will find all the lines in the input stream on which there is a "mailto" tag.
You can assume that the mailto tag if it exists is the first HTML tag on the line.
You can assume there is at most only 1 mailto tag per line.
You can assume that all the mailto:address expressions are surrounded by double quotes (i.e. just as in the examples above).

It will parse those lines to remove only the actual addresses (the "user@domain" parts) and print them to standard output.
It will collate them in std output in such a form that they could be pasted immediately into an email address line, i.e. they should be separated by commas.
There will be no leading or trailing commas.
It will output nothing at all if there are no mailto tags in the input stream.
When I say nothing, I mean nothing. No blank spaces. No blank lines. Nothing.
Usage of this program is like: cat file.html | filtermailto
Output should look like:

<../../Icons/new.gif> I expect these to be printed out in the order they are found - first found in the input stream, first printed.

<../../Icons/new.gif> Some people are printing a trailing comma, and then trying to remove it with a backspace: printf '\b'
This works at the command-line, but strangely enough doesn't seem to work in the CGI environment. So better not to print the comma in the first place.

Things you might need: "cut" and "printf".

Note this program could be used in a useful way - a user keeping their contacts list in HTML, with mailto buttons for each person, and occasionally building up a list mailing. Or it could be used in a harmful way, by evil spammers grabbing addresses off other people's web pages.

Tip: Test your program on a file containing the following line:

<a href="mailto:addresses"><img src="../Icons/mailto.gif"></a>
It should extract the "addresses" bit only.
# 2  
Old 05-02-2002
Please take the time to read the rules.

And when you do, take a look at rule number 6.
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