Re: text processing problem with bash/perl

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Dennis Kaptain <dkaptain@xxxxxxxxxxxx> wrote:

>> > 
>> > Hi,
>> > 
>> > Anyone has some ways for the following text processing problem? I have a text 
>> > file containing two stanzas attached below. I want to uncomment the stanza with 
>> > 'host=localhost' line, while left the other stanza unchanged.
>> > 
>> > ...
>> > 
>> > /* udp_send_channel {
>> >   host=localhost
>> >   port = 10017
>> >   ttl = 1
>> > } */
>> > 
>> > /* udp_send_channel {
>> >   host=ganglia100.ec2.example.com
>> >   port = 10017
>> >   ttl = 1
>> > } */
>> > 
>> > ...
>> > 
>> > If I use command below then both stanza will be altered... Please help.
>> > 
>> > sed  -i -e '/^\/\* udp_send_channel/, /} \*\// {s/^\/\* 
>> > udp_send_channel/udp_send_channel/g; s/\} \*\//}/g; }'
>> > 
>> > --David
>> > 
>>     
>
> this is probably WAY more than you wanted
<SNIP>

A tad simpler:

#! /usr/bin/perl -w
use strict;

my $file;

open FILE, "stuff.txt" or die;

# Undefine the input record separator.

undef $/;

# Slurp the whole file in

$file = <FILE>;
close FILE;

# Pattern match on the stanza we want to uncomment and uncomment it.  
You may need to play with
# the white space in the output to get the formatting you want.

$file =~ s?/*\s*udp_send_channel {\n\s*host=localhost\n\s*port = 
10017\n\s*ttl = 1\n\s*} */\n?udp_send_channel {\n  host=localhost\n  
port = 10017\n  ttl = 1\n}?;

# Write the result.

print $file;

#~~~~~~~~~~~~~~~~~End of Script~~~~~~~~~~~~~~

Cheers,
Dave

-- 
Politics, n. Strife of interests masquerading as a contest of principles.
-- Ambrose Bierce

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