Steve,
check out the "Advanced Bash Scripting Guide". It's a very good tutorial.
Cheers,
Harry
Steve Buehler wrote:
I am hoping that someone here can help me with a shell script. I
can do this in PHP but am trying to learn how to script better in a
shell script.
What I am trying accomplish here is to get all of this into one
script and do it more efficiently:
1. Get all db.domainname.extension files in the /var/named directory
2. Replace any occurance of a line that starts with
"mail\s\+A\s\+192.168.22[4-5].*" with "mail\t\t\tA\t192.168.1.4"
2.a. For testing, I am copying these to another directory first and
doing all work in the test directory until the script works perfectly.
3. If the file gets changed, I need it to put the file name without the
leading "db." into test.txt in the following format:
to:domainname.extension RELAY
4. If the file already has the line of "mail\s\+A\s\+192.168.1.4" in
it, then I need it to also put that into the test.txt file in the same
format.
to:domainname.extension RELAY
5. If the file has anything but the "192.168.22[4-5].*" or
"192.168.1.4" IP's for that line, then I don't want it to change it and
I don't want to record it in the test.txt file.
This script is going to change all of the dns records so that the
mail.domainname.extension will point to our new email server. I want to
get it automated so that if anybody sets a site up in our Ensim control
panel, it will make these changes and then I can create a script that
will move the test.txt file over to the email server in an "access"
file, then make the access.db and restart sendmail/MailScanner. I will
eventually test to see if there are any changes in the old and new
access files and if not, it won't restart sendmail/MailScanner. I
figure that I will run this twice a day.
Right now, I am doing this in two separate scripts and it doesn't do
everything I want here anyway.
Here is what I have so far:
----start test.sh file----
#!/bin/sh
cp -pf /var/named/db* .
for i in `ls db.*`
do
echo $i
mv $i $i.$$
sed 's/mail\s\+A\s\+192.168.22[4-5].*/mail\t\t\tA\t192.168.1.4/' $i.$$ > $i
rm $i.$$
done
----end test.sh file----
----start test2.sh file----
#!/bin/sh
for i in `ls db.*`
do
echo $i
grep -H 'mail\t\t\tA\t192.168.1.4'
rm $i.$$
done
----end test2.sh file----
Thanks in advance for any help.
Steve
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