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Inserting text into a file but searching for the place to put it!

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# 1  
Old 09-24-2010
Power Inserting text into a file but searching for the place to put it!
Hi

I would love a bit of help with a problem im having with a script. I need to insert a line of text which is saved in a variable called $fwInsert into a file whos name is saved in a variable called $server but it needs to be in a certain order.

The file is a forward file for a network and it will look something like this:
Code:
;zone file for test001.btcuk
$TTL 2d
@      IN     SOA    testserver.servers009.btcuk.    root.servers009.btcuk (
                        2010092401            ;               serial number with no of editings
                        24h                       ;               refresh
                        5m                        ;               update entry
                        1w                        ;               expirary
                        2h )                      ;                minimum
                        NS        testserver.servers009.btcuk
testmachine1      IN         A          192.189.1.1
testmachine2      IN         A          192.189.1.2
wibble                IN         A          192.189.1.42
tesmachineend    IN         A           192.189.1.255


I need to insert a machine into this file (i have the line of test like this in the variable $fwInsert as mentioned above) so I need to search through the file by ip address, find out where i'm supposed to put it and the paste it. I have tried grep but it error'd saying too many arguments and ive tried sed but it did nothing, no text was inserted but no error either which I suppose is an improvement.
Any help would be greatly appreciated.

Thanks

Katie

ps im using shell not korn Smilie
Last edited by Franklin52; 09-24-2010 at 09:57 AM.. Reason: Please use code tags!
# 2  
Old 09-24-2010
I assume the example is 'before insert', please show us after a successful update and a sample insert string.
# 3  
Old 09-24-2010
A successful insert would look like this:

Code:
;zone file for test001.btcuk
$TTL 2d
@      IN     SOA    testserver.servers009.btcuk.    root.servers009.btcuk (
                        2010092401            ;               serial number with no of editings
                        24h                       ;               refresh
                        5m                        ;               update entry
                        1w                        ;               expirary
                        2h )                      ;                minimum
                        NS        testserver.servers009.btcuk
testmachine1      IN         A          192.189.1.1
testmachine2      IN         A          192.189.1.2
testmachine3      IN         A          192.189.1.3
wibble                IN         A          192.189.1.42
tesmachineend    IN         A           192.189.1.255

# 4  
Old 09-24-2010
Code:
vi '+/192\.189\.1\.2' log_file << EOF
o$fwInsert^[:wq
EOF

where the ^[ is the ESC character, entered by typing CONTROL-V ESCAPE in vi insert mode.

Also. It may be tricky to add the backslashes between the IP numbers...
So, you could probably get away without using them... But the dot is a RE token.

maybe this might be a tad better:

Code:
vi +/" 192.189.1.2$" log_file << EOF
...

... or...

Code:
vi +/" $IP$" log_file << EOF
...

Last edited by quirkasaurus; 09-24-2010 at 12:20 PM.. Reason: mistake on IP address.
This User Gave Thanks to quirkasaurus For This Post:
KatieV
# 5  
Old 09-24-2010
Code:
sed '/wibble/ i testmachine3      IN         A          192.189.1.3' file name

. This search for wibble line and add your line before that ( i flag is for insert). I m not sure is this what u want?
# 6  
Old 09-24-2010
Those are fab, thanks but my problem is that each file will have a different set of computers in it so i cant just search for the computer name. the file is sorted by ip address and thats what i need to search with. Any ideas?

I was thinking a while loop that starts from the ip address and takes one off each time and searches for it. If it doesnt find it at all then it inserts the file at the top?
# 7  
Old 09-24-2010
wow. at this point, how about a simplied input/output that shows all of your test cases?
better yet, you could post what you've tried so far and show what it's missing.
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