Hi,

I wrote the below script which replaces all email ids of a certain domain to a fixed email id in all pages of docroot of websites in my webserver recursively. There are multiple accounts(websites) hosted on the server.


for u in $(cat /etc/passwd |grep /home | cut -d : -f1)
do
echo "Now searching & replacing email ids inside account $u ..."
for k in $(grep -rl @mydomain.com /home/$u/public_html/)
do
sed -i s/.*@mydomain.com/myforms1@gmail.com/g $k
done
echo "Completed for account $u "
done


This worked very well, but the problem is when it encountered a string like

$mail2->AddBCC("forms@mydomain.com");

it replaced the whole string with myforms1@gmail.com

Is there a way how to get rid of this?



Thanks in advance.

It did as you specified - make the test more specific. ".*" at the start of a regex like that says "everything up to ...".
Better think some more about the structure of your data, and what you really want to do with it.

It did exactly what you told it!!

sed 's/.*etc/newstuff/'
means: match any number of characters, followed by "etc", and replace with "newstuff". So it replaced the whole line.

You need an expression which will match the specific patterns found in your file. In your example, you show the address in quotes. For that, you could use:
sed 's/".*@mydomain.com"/newstuff/'

Well I changed the script to:

sed -i 's/".*@mydomain.com"/"myforms1@gmail.com"/g' $k

And it works great, Thanks!

But this will not change simple sentences like

email = abc@mydomain.com

which is again a challenge for me. How to accomplish both at a time? Should I use two SEDs in the script?

Also one more thing, I need to exclude 2 email ids from getting changed. Say for example test@mydomain.com & pass@mydomain.com

Is there any option in SED for the same?

What you need to do is look at all the possible formats for an e-mail address and all the content to be used for making decisions. Sometimes you will need multiple commands, and sometimes you will need something like a sed script with multiple steps.

At this point, I recommend that you read thru the tutorials here: http://www.grymoire.com/Unix/
Look especially at SED, AWK, and Regular Expressions.
Don't try to memorize all the syntax, but just read to get a flavor of the kinds of things that are possible.

I'm still an amateur at scripting, and the only way I get things to work is old-fashioned "cut and try".