Shell Programming and Scripting

Hi all,

Currently, i have a log file seperated by 'tab' and each record starting with a new line. i managed to retrieve the column that i'm interested in. (source_ip_address: xxx.xxx.xxx.xxx). [in shell scripting]

example of awk output: '{ print $43 }' assuming the field is at column 43.
10.10.10.10
12.1.1.2
10.0.0.1
10.0.0.25

however, i've a problem storing each line of ip_address to variables in shell scripting. eventually, i will need to retrieve each line of ip_address (variable) and process some functions to it.

Any suggestions will be much appreciated!

A common way of handling this issue is to store the output of awk to a temporary file and then process that file.

One way to do it would be to read each line into the array as piped from awk...

Code:

<awk output> | while read line
do
	iparray=($line)
	echo "Read $line into array."
done

Or even writing a file with the awk output to a file and then storing each line of the file into an array.

Code:

cat $file | while read line
do
	iparray=($line)
	echo "Read $line into array."
done

Then it is just a matter of operating on the $iparray.

Thanks for all of your promptly replies~
will work them out soon

(ksh)

Code:

set -A IP $(awk '{print $43}' infile)

(bash (and ksh - newer ones only, I think, and new probably means circa 1993!))

Code:

IP=($(awk '{print $43}' infile))

Code:

echo ${IP[0]}
10.10.10.10

echo ${IP[1]}
12.1.1.2

...