Stewart Anderson wrote:
JC Janos wrote:
I have a file containing IP addresses & ranges, their negations, and
comments. E.g.,
1.1.1.1 # comment A
2.2.2.2/29 # comment B
!3.3.3.3 # comment C
!4.4.4.4/28 # comment D
I need to extract those IPs & ranges, rearrange them into a
comma-separated list, e.g.,
1.1.1.1,2.2.2/29,!3.3.3.3,!4.4.4.4/28
I've read that Perl (which I don't know yet at all) is "best" for
Text
processing like this.
The thing is that I need to do this from within a Bash script, and
assign the comma-separated list to a variable in that Bash script.
Here is an example of the same thing in shell speak just do whatever
you want with. The ipaddy in the loop to purduce the string you
require.
cat ipin.txt |while read inline
do ipaddy=`echo $inline |awk '{print $1 } '`
echo $ipaddy
done
Why not just:
ipaddy=`awk '{ print $1 }' ipin.txt`
But that still doesn't get you a comma-separated list.
John
--
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order. -- Larry Wall
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