#!/usr/bin/env perl
use warnings;
use strict;

# Description: Processes libvirt Clients

our $VERSION = '1.0';

# Looks at various libvirt information about running virtuals
# Written by RWR and BNR, 20210228

BEGIN {
   push @INC, shift;
}

use library;

# category we will use for all values found
# see sysinfo for a list of valid categories
my $CATEGORY = 'xen';

# run the commands necessary to do whatever you want to do
# The library entered above has some helper routines
# validCommandOnSystem -- passed a name, returns the fully qualified path or
# '' if it does not exist
# cleanUp - passed a delimiter and a string, does the following (delimiter
# can be '')
#           chomps the string (removes trailing newlines)
#           removes all text BEFORE the delimiter, the delimiter, and any
# whitespace
#           thus, the string 'xxI Am x  a weird string' with a newline will
# become
#           'a weird string' with no newline

# now, return the tab delimited output (to STDOUT). $CATEGORY is the first
# item, name as recognized by sysinfo is the second and the value is
# the last one. For multiple entries, place on separate lines (ie, newline
# separated)

my $xl = &validCommandOnSystem( 'virsh' );
# print "My command is $xl\n";
exit 1 unless $xl;
$xl .= ' list';
# print "My command is $xl\n";
# die;

sub parseOutput {
   my $output = shift;
   my @lines = split( "\n", $output );
   my %domu;
   return ( 'noname' ) unless $lines[0] =~ m/^\s*id\s+name\s+state\s*$/i;
   for ( my $i = 2; $i < @lines; $i++ ) {
#      print "Working on $i, value is {$lines[$i]}\n";
      $lines[$i] =~ s/^\s*//;
#      print "After cleanup, value is {$lines[$i]}\n";
      my ( $id,$name ) = split( /\s+/, $lines[$i] );
      $domu{$name}{'id'} = $id;
   }
   return \%domu;
}

my $output = `$xl`;

#print $output;
#die;

my $hier = &parseOutput( $output );

#die;

foreach my $domu ( sort keys %$hier ) {
   my $temp = $$hier{$domu};
   foreach my $key ( sort keys %$temp ) {
      print "$CATEGORY\tvirtual\t$domu\t$key\t$$temp{$key}\n";
   }
} # foreach

# if you have not done an exit state above (1 indicating no data), do one
# here (exit 0 indicates success)
# NOTE: you can bail early with exit 1 if you can not process anything
# because it is the wrong system or something
exit 0;