I would like to remove all addresses that start with '192.18' from results. I keep either removing all addresses or none...
Here is the code.
sub get_oids{
my($starting_oid , $new_oid , $unique_oid , $result , $crap);
my($ip , $name , $port , $type);
$starting_oid = $_[0];
$new_oid = $starting_oid ;
while(Net::SNMP::oid_context_match($starting_oid,$new_oid)){
$result = $session->get_next_request(($new_oid));
return unless (defined $result);
($new_oid , $crap) = %$result;
if (Net::SNMP::oid_context_match($starting_oid,$new_oid)){
$unique_oid = $new_oid;
$unique_oid =~ s/$starting_oid//g;
$ip = (Convert_IP(Get_SNMP_Info("$oid_root".".4"."$unique_
+oid")));
$name = (Get_SNMP_Info("$oid_root".".6"."$unique_oid"));
$port = (Get_SNMP_Info("$oid_root".".7"."$unique_oid"));
$type = (Get_SNMP_Info("$oid_root".".8"."$unique_oid"));
#todo=(#todo,$ip);
write;
get_oids($new_oid);
Have you considered using the contains() method from NetAddr::IP?
#!/usr/bin/env perl
use strict;
use warnings;
use feature 'say';
use NetAddr::IP;
my #ips = qw(192.168.0.1 192.18.0.1 192.18.22.44 255.255.255.0);
my $Range = NetAddr::IP->new('192.18.0.0/16');
for my $ip (#ips) {
my $IP = NetAddr::IP->new($ip);
my $contains = $Range->contains($IP) ? "yes" : "no";
say "$ip: $contains";
}
Which gives the following output:
alex#yuzu:~$ ./net_addr_ip.pl
192.168.0.1: no
192.18.0.1: yes
192.18.22.244: yes
255.255.255.0: no
Related
I have an XML file. I need to replace the digits in comment="18" with comment="my string" where my string is from my #array ($array[18] = my string).
<rule ccType="inst" comment="18" domain="icc" entityName="thens" entityType="toggle" excTime="1605163966" name="exclude" reviewer="hpanjali" user="1" vscope="default"></rule>
This is what I have tried.
while (my $line = <FH>) {
chomp $line;
$line =~ s/comment="(\d+)"/comment="$values[$1]"/ig;
#print "$line \n";
print FH1 $line, "\n";
}
Here is an example using XML::LibXML:
use strict;
use warnings;
use XML::LibXML;
my $fn = 'test.xml';
my #array = map { "string$_" } 0..20;
my $doc = XML::LibXML->load_xml(location => $fn);
for my $node ($doc->findnodes('//rule')) {
my $idx = $node->getAttribute('comment');
$node->setAttribute('comment', $array[$idx]);
}
print $doc->toString();
Here's an XML::Twig example. It's basically the same idea as the XML::LibXML example done in a different way with a different tool:
use XML::Twig;
my $xml =
qq(<rule ccType="inst" comment="18"></rule>);
my #array;
$array[18] = 'my string';
my $twig = XML::Twig->new(
twig_handlers => {
rule => \&update_comment,
},
);
$twig->parse( $xml );
$twig->print;
sub update_comment {
my( $t, $e ) = #_;
my $n = $e->{att}{comment};
$e->set_att( comment => $array[$n] );
}
I have a file with lines similar to following:
abcd1::101:xyz1,user,user1,abcd1,pqrs1,userblah,abcd1
I want to retain strings up to last ":" and remove all occurrences of abcd1
In the end, I need to have below:
abcd1::101:xyz1,xyz2,xyz3,pqrs1,xyz4
I tried code as below, but for some reason, it is not working. So please help
the account name is "abcd1"
sub UpdateEtcGroup {
my $account = shift;
my $file = "/tmp/group";
#ARGV = ($file);
$^I = ".bak";
while (<>){
s#^($account::\d{1,$}:)$account,?#$1#g;
s/,$//; # to remove the last "," if there
print;
}
}
split is the tool for the job, not a regex.
Because split lets you reliably separate out the field you do want to operate on, from the ones that you don't. Like this:
#!/usr/bin/env perl
use strict;
use warnings;
my $username = 'abcd1';
while ( <DATA> ) {
my #fields = split /:/;
my #users = split ( /,/, pop ( #fields ) );
print join ( ":", #fields,
join ( ",", grep { not m/^$username$/ } #users ) ),"\n";
}
__DATA__
abcd1::101:xyz1,user,user1,abcd1,pqrs1,userblah,abcd1
Don't use a regular expression for this.
use strict;
use warnings;
while (<DATA>) {
chomp;
my #parts = split(/:/, $_);
$parts[-1] = join(',', grep { !/^abcd/ } split(/,/, $parts[-1]));
print join(':', #parts) . "\n";
}
__DATA__
abcd1::101:xyz1,user,user1,abcd1,pqrs1,userblah,abcd1
abcd2::102:user1,xyz2,otheruser,abcd2,pqrs1,xyz4,abcd2
Output:
abcd1::101:xyz1,user,user1,pqrs1,userblah
abcd2::102:user1,xyz2,otheruser,pqrs1,xyz4
I have a 100MB plain text database file which I would like to parse and convert into datastructure for easy access. The environment is perl and cygwin. Since we receive the plain text file with data from third party, I am not able to use any existing parser like xml or google protocol buffers.
Text file looks like below.
Class=Instance1
parameterA = <val>
parameterB = <val>
parameterC = <val>
ref = Instance2
Class=Instance2
parameterA = <val>
parameterB = <val>
parameterC = <val>
The file contains a huge number class variants.
What would be the best option to parse this ? Will yacc/lex help me or should i write my own perl parser ?
This should do the trick. It auto-detects the line ending by checking the first one, and the assumption here is a record is separated by a blank line.
Within each record, key/value pairs are assumed to be joined with an equal sign (=), and maybe some whitespace.
Here's my code:
#!/bin/env perl
use strict;
use warnings;
use Data::Dumper;
use Getopt::Long;
my $db_file;
GetOptions(
'file=s' => \$db_file,
);
sub detect_line_ending {
my ($fh) = #_;
my $line = <$fh>;
# Rewind to the beginning
seek($fh, 0, 0);
my ($ending) = $line =~ m/([\f\n\r]+$)/s;
return $ending;
}
sub process_chunk {
my ($chunk, $line_ending) = #_;
my #lines = split(/$line_ending/, $chunk);
my $section = {};
foreach my $line (#lines) {
my ($key, $value) = split(/[ \t]*=[ \t]*/, $line, 2);
$section->{$key} = $value;
}
return $section;
}
sub read_db_file {
my ($file) = #_;
my $data = [];
open (my $fh, '<', $file) or die $!;
my $line_ending = detect_line_ending($fh);
{
local $/ = $line_ending.$line_ending;
while (my $chunk = <$fh>) {
chomp $chunk;
my $section = process_chunk($chunk, $line_ending);
push #$data, $section;
}
}
close $fh;
return $data;
}
print Dumper read_db_file($db_file);
Is this what you want?
#!/usr/bin/perl
use Data::Dumper;
use Modern::Perl;
my %classes;
my $current;
while(<DATA>) {
chomp;
if (/^Class\s*=\s*(\w+)/) {
$classes{$1} = {};
$current = $1;
} elsif (/^(\w+)\s*=\s*(.+)$/) {
$classes{$current}{$1} = $2;
}
}
say Dumper\%classes;
Output:
$VAR1 = {
'Instance2' => {
'parameterC' => '<val>',
'parameterB' => '<val>',
'parameterA' => '<val>'
},
'Instance1' => {
'parameterC' => '<val>',
'ref' => 'Instance2',
'parameterB' => '<val>',
'parameterA' => '<val>'
}
};
HI I am trying to exract some data from a text file in perl. My file looks like this
Name:John
FirstName:Smith
Name:Alice
FirstName:Meyers
....
I want my string to look like John Smith and Alice Meyers
I tried something like this but I'm stuck and I don't know how to continue
while (<INPUT>) {
if (/^[Name]/) {
$match =~ /(:)(.*?)(\n) /
$string = $string.$2;
}
if (/^[FirstName]/) {
$match =~ /(:)(.*?)(\n)/
$string = $string.$2;
}
}
What I try to do is that when I match Name or FirstName to copy to content between : and \n but I get confused which is $1 and $2
This will put you first and last names in a hash:
use strict;
use warnings;
use Data::Dumper;
open my $in, '<', 'in.txt';
my (%data, $names, $firstname);
while(<$in>){
chomp;
($names) = /Name:(.*)/ if /^Name/;
($firstname) = /FirstName:(.*)/ if /^FirstName/;
$data{$names} = $firstname;
}
print Dumper \%data;
Through perl one-liner,
$ perl -0777 -pe 's/(?m).*?Name:([^\n]*)\nFirstName:([^\n]*).*/\1 \2/g' file
John Smith
Alice Meyers
while (<INPUT>) {
/^([A-Za-z])+\:\s*(.*)$/;
if ($1 eq 'Name') {
$surname = $2;
} elsif ($1 eq 'FirstName') {
$completeName = $2 . " " . $surname;
} else {
/* Error */
}
}
You might want to add some error handling, e.g. make sure that a Name is always followed by a FirstName and so on.
$1 $2 $3 .. $N , it's the capture result of () inside regex.
If you do something like that , you cant avoid using $1 like variables.
my ($matched1,$matched2) = $text =~ /(.*):(.*)/
my $names = [];
my $name = '';
while(my $row = <>){
$row =~ /:(.*)/;
$name = $name.' '.$1;
push(#$names,$name) if $name =~ / /;
$name = '' if $name =~ / /;
}
`while(<>){
}
`
open (FH,'abc.txt');
my(%hash,#array);
map{$_=~s/.*?://g;chomp($_);push(#array,$_)} <FH>;
%hash=#array;
print Dumper \%hash;
Given a url the following regular expression is able insert/substitute in words at certain points in the urls.
Code:
#!/usr/bin/perl
use strict;
use warnings;
#use diagnostics;
my #insert_words = qw/HELLO GOODBYE/;
my $word = 0;
my $match;
while (<DATA>) {
chomp;
foreach my $word (#insert_words)
{
my $repeat = 1;
while ((my $match=$_) =~ s|(?<![/])(?:[/](?![/])[^/]*){$repeat}[^/]*\K|$word|)
{
print "$match\n";
$repeat++;
}
print "\n";
}
}
__DATA__
http://www.stackoverflow.com/dog/cat/rabbit/
http://www.superuser.co.uk/dog/cat/rabbit/hamster/
10.15.16.17/dog/cat/rabbit/
The output given (for the first example url in __DATA__ with the HELLO word):
http://www.stackoverflow.com/dogHELLO/cat/rabbit/
http://www.stackoverflow.com/dog/catHELLO/rabbit/
http://www.stackoverflow.com/dog/cat/rabbitHELLO/
http://www.stackoverflow.com/dog/cat/rabbit/HELLO
Where I am now stuck:
I would now like to alter the regular expression so that the output will look like what is shown below:
http://www.stackoverflow.com/dogHELLO/cat/rabbit/
http://www.stackoverflow.com/dog/catHELLO/rabbit/
http://www.stackoverflow.com/dog/cat/rabbitHELLO/
http://www.stackoverflow.com/dog/cat/rabbit/HELLO
#above is what it already does at the moment
#below is what i also want it to be able to do as well
http://www.stackoverflow.com/HELLOdog/cat/rabbit/ #<-puts the word at the start of the string
http://www.stackoverflow.com/dog/HELLOcat/rabbit/
http://www.stackoverflow.com/dog/cat/HELLOrabbit/
http://www.stackoverflow.com/dog/cat/rabbit/HELLO
http://www.stackoverflow.com/HELLO/cat/rabbit/ #<- now also replaces the string with the word
http://www.stackoverflow.com/dog/HELLO/rabbit/
http://www.stackoverflow.com/dog/cat/HELLO/
http://www.stackoverflow.com/dog/cat/rabbit/HELLO
But I am having trouble getting it to automatically do this within the one regular expression.
Any help with this matter would be highly appreciated, many thanks
One solution:
use strict;
use warnings;
use URI qw( );
my #insert_words = qw( HELLO );
while (<DATA>) {
chomp;
my $url = URI->new($_);
my $path = $url->path();
for (#insert_words) {
# Use package vars to communicate with /(?{})/ blocks.
local our $insert_word = $_;
local our #paths;
$path =~ m{
^(.*/)([^/]*)((?:/.*)?)\z
(?{
push #paths, "$1$insert_word$2$3";
if (length($2)) {
push #paths, "$1$insert_word$3";
push #paths, "$1$2$insert_word$3";
}
})
(?!)
}x;
for (#paths) {
$url->path($_);
print "$url\n";
}
}
}
__DATA__
http://www.stackoverflow.com/dog/cat/rabbit/
http://www.superuser.co.uk/dog/cat/rabbit/hamster/
http://10.15.16.17/dog/cat/rabbit/
Without crazy regexes:
use strict;
use warnings;
use URI qw( );
my #insert_words = qw( HELLO );
while (<DATA>) {
chomp;
my $url = URI->new($_);
my $path = $url->path();
for my $insert_word (#insert_words) {
my #parts = $path =~ m{/([^/]*)}g;
my #paths;
for my $part_idx (0..$#parts) {
my $orig_part = $parts[$part_idx];
local $parts[$part_idx];
{
$parts[$part_idx] = $insert_word . $orig_part;
push #paths, join '', map "/$_", #parts;
}
if (length($orig_part)) {
{
$parts[$part_idx] = $insert_word;
push #paths, join '', map "/$_", #parts;
}
{
$parts[$part_idx] = $orig_part . $insert_word;
push #paths, join '', map "/$_", #parts;
}
}
}
for (#paths) {
$url->path($_);
print "$url\n";
}
}
}
__DATA__
http://www.stackoverflow.com/dog/cat/rabbit/
http://www.superuser.co.uk/dog/cat/rabbit/hamster/
http://10.15.16.17/dog/cat/rabbit/
one more solution:
#!/usr/bin/perl
use strict;
use warnings;
my #insert_words = qw/HELLO GOODBYE/;
while (<DATA>) {
chomp;
/(?<![\/])(?:[\/](?![\/])[^\/]*)/p;
my $begin_part = ${^PREMATCH};
my $tail = ${^MATCH} . ${^POSTMATCH};
my #tail_chunks = split /\//, $tail;
foreach my $word (#insert_words) {
for my $index (1..$#tail_chunks) {
my #new_tail = #tail_chunks;
$new_tail[$index] = $word . $tail_chunks[$index];
my $str = $begin_part . join "/", #new_tail;
print $str, "\n";
$new_tail[$index] = $tail_chunks[$index] . $word;
$str = $begin_part . join "/", #new_tail;
print $str, "\n";
}
print "\n";
}
}
__DATA__
http://www.stackoverflow.com/dog/cat/rabbit/
http://www.superuser.co.uk/dog/cat/rabbit/hamster/
10.15.16.17/dog/cat/rabbit/