abhi1390 has asked for the wisdom of the Perl Monks concerning the following question:

I am new to perl programming. And i am trying to do the configuration file using Config::Simple The configuration file i.e. new1.conf 

[Section1]
param1=value1
param2=value2

[Section2]
param1=value1
param2=value2

[Section3]
param1=value1
param2=value2

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here is my code

use Config::Simple;

$cfg = new Config::Simple(syntax => 'ini');

#
# Get Section Names
# 
$cfg = Config::Simple->import_from('new.conf', \%Config)  or die Confi
+g::Simple->error();
my @arr = ( keys %Config );
@arr1 = grep s/\..*//, @arr;
my %uniq;
@uniq{@arr} = ();
@sections = keys %uniq;

foreach my $secname (sort @sections) 
{
    print "section : $secname\n";
    foreach (sort keys %Config) 
    {

        print "$_ : $Config{$_}\n";

    }
}

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For this i am getting the output like this 

section : Section1
Section1.param1 : value1
Section1.param2 : value2
Section2.param1 : value1
Section2.param2 : value2
Section3.param1 : value1
Section3.param2 : value2
section : Section2
Section1.param1 : value1
Section1.param2 : value2
Section2.param1 : value1
Section2.param2 : value2
Section3.param1 : value1
Section3.param2 : value2
section : Section3
Section1.param1 : value1
Section1.param2 : value2
Section2.param1 : value1
Section2.param2 : value2
Section3.param1 : value1
Section3.param2 : value2

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I am trying to compare the section names with paramaters in that respective section. for that i am trying to write this code 

foreach my $secname (sort @sections) 
{
    print "section : $secname\n";
    foreach (sort keys %Config) 
    {
        $var = grep { !/\b[A-Za-z0-9.].*[.]/ } @arr;
        if($secname == $var)
        {
            print "$secname\n";
        }
        else
        {
            print "false\n";
        }

        #compare 'secname' vs 'dialer onboard'.xxx
        #print "$_ : $Config{$_}\n";

    }
}

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This is not working for me. I stuck up here only I cant be able to compare and display the section name with the respective params and values.

And finally i want output like this below.

section : Section1
Section1.param1 : value1
Section1.param2 : value2
section : Section2
Section2.param1 : value1
Section2.param2 : value2
section : Section3
Section3.param1 : value1
Section3.param2 : value2

[download]

or at least i want to display the params. I think i am doing something wrong in comparing params and section. I am not able to identify that. Please somebody suggest me where i am going wrong Thanks in advance.

Replies are listed 'Best First'.
Re: perl: Config::Simple config file reading
by poj (Abbot) on Jul 24, 2015 at 10:48 UTC
    Try 
    #!perl;
use strict;
use Config::Simple;

my %Config=();
Config::Simple->import_from('new.conf', \%Config)  
   or die Config::Simple->error();

my %hash=();
for my $key (keys %Config){
  my ($sect,$para) = split /\./,$key;
  $hash{$sect}{$para} = $Config{$key};
}

for my $sect (sort keys %hash){
  print "section : $sect\n";
  for my $para (sort keys %{$hash{$sect}}){
    print "$sect.$para : ".$hash{$sect}{$para}."\n";
  }
}

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    poj
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Re: perl: Config::Simple config file reading
by 1nickt (Canon) on Jul 24, 2015 at 23:23 UTC

    UPDATE: You also cross-posted this question on Stackoverflow. It's good form to mention that and provide a link.

    There are problems with your code. You should always use strict; at the top of all your code and let Perl find some of your errors for free.

    But besides that you are using a module that doesn't return the data in the way you want. You should use Config::Tiny which is only for ini-style files, and returns a reference to a hash structure as you want:

    #! perl -w
use strict;
use feature qw/ say /;

use Config::Tiny;
my $cfg = Config::Tiny->new;
   $cfg = Config::Tiny->read('new.conf') or die $!; 

foreach my $section (sort keys %{ $cfg }) {
  say "section: $section";
  foreach my $param (sort keys %{ $cfg->{ $section } }) {
    say "$section.$param : $cfg->{ $section }->{ $param }"; 
  }
}

__END__

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