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#!/usr/bin/env perl
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#!/usr/bin/env perl
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use warnings;
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use warnings;
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use strict;
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use strict;
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# Description: Processes Xen Clients
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our $VERSION = '1.1';
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use version ; our $VERSION = '1.1.1';
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# Author: R. W. Rodolico
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# Date:   2016-09-11
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#
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# Looks at various Xen parameters, mainly which DOMU's are running on it
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# Looks at various Xen parameters, mainly which DOMU's are running on it
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#
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# Revision History
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#
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# Written by RWR, 20160911
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# 20250403 RWR v1.1.1
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# changed parseOutput to parseXenOutput to avoid conflict with libvirt module
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#
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# find our location and use it for searching for libraries
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# find our location and use it for searching for libraries. library.pm must be in the same directory as the calling script
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# or, if run interactively, in the parent of the modules
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BEGIN {
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BEGIN {
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   use FindBin;
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   use FindBin;
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   use File::Spec;
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   use File::Spec;
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   # prepend the bin directory and its parent
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   use lib File::Spec->catdir($FindBin::Bin);
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   use lib File::Spec->catdir($FindBin::Bin), File::Spec->catdir("$FindBin::Bin/..");
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   eval( 'use library;' );
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   eval( 'use library;' );
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   die "Could not find library.pm in the code directory\n" if $@;
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   die sprintf( "Could not find library.pm in %s, INC is %s\n", __FILE__, join( "\n", @INC ) ) if $@;
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   eval( 'use Data::Dumper;' );
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}
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}
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#####
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# check for valid OS.
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##### Change these to match your needs
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#####
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# Make this a list of all the modules we are going to use. You can replace undef with the version you need, if you like
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my $modulesList = {
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exit 1 unless &checkOS( { 'linux' => undef } );
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        'Data::Dumper'     => undef,
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   };
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# check for required commands, return 2 if they don't exist. Enter an full list of all commands required. If one doesn't exist
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# hash of commands that are needed for the system. key is the name of the command and, in some cases, the value will become
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# the full path (from which or where)
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# script returns a 2
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my $commandsList = {
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        'xl' => undef,
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   };
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# list of operating systems this module can be used on.
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my $osList = {
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#         'mswin32' => undef,
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#         'freebsd' => undef,
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         'linux'   => undef,
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   };
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# the category the return data should go into. See sysinfo for a list
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my $CATEGORY = 'virtual';
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#####
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##### End of required
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#####
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# some variables needed for our system
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my $errorPrepend = 'error: in ' . __FILE__; # this is prepended to any error messages
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my @out; # temporary location for each line of output
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# Try to load the modules we need. If we can not, then make a list of missing modules for error message.
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foreach my $command ( 'xl' ) {
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for my $module ( keys %$modulesList ) {
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   eval ( "use $module;" );
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   exit 2 unless &validCommandOnSystem( $command );
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   push @out, "$errorPrepend Could not load $module" if $@;
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}
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}
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# category we will use for all values found
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# see sysinfo for a list of valid categories
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my $CATEGORY = 'xen';
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# run the commands necessary to do whatever you want to do
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# The library entered above has some helper routines
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# validCommandOnSystem -- passed a name, returns the fully qualified path or
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# '' if it does not exist
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# cleanUp - passed a delimiter and a string, does the following (delimiter
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if ( ! @out && ! checkOS ( $osList ) ) { # check if we are on an acceptible operating system
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# can be '')
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#           chomps the string (removes trailing newlines)
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    push @out, "$errorPrepend Invalid Operating System";
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#           removes all text BEFORE the delimiter, the delimiter, and any
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# whitespace
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#           thus, the string 'xxI Am x  a weird string' with a newline will
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# become
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#           'a weird string' with no newline
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}
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# now, return the tab delimited output (to STDOUT). $CATEGORY is the first
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if ( !@out && ! validCommandOnSystem ( $commandsList ) ) {
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# item, name as recognized by sysinfo is the second and the value is
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   push @out, "$errorPrepend Can not find some commands needed";
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# the last one. For multiple entries, place on separate lines (ie, newline
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# separated)
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my $xl = 'xl';
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exit 1 unless $xl;
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$xl .= ' list';
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sub parseOutput {
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   my $output = shift;
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   my @lines = split( "\n", $output );
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   my %domu;
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   return ( 'noname' ) unless $lines[0] =~ m/^Name/;
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   return ( 'baddomu') unless $lines[1] =~ m/^Domain-0/;
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   for ( my $i = 2; $i < @lines; $i++ ) {
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      my ( $name,$id,$mem,$vcpu,$state,$time) = split( /\s+/, $lines[$i] );
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      $domu{$name}{'id'} = $id;
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      $domu{$name}{'memory'} = $mem;
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      $domu{$name}{'numcpu'} = $vcpu;
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   }
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   return \%domu;
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}
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}
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if ( !@out ) { # we made it, we have everything, so do the processing
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   #####
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   ##### Your code starts here. Remember to push all output onto @out
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   #####
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   sub parseXenOutput {
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      my $output = shift;
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      my @lines = split( "\n", $output );
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      my %domu;
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      return ( 'noname' ) unless $lines[0] =~ m/^Name/;
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      return ( 'baddomu') unless $lines[1] =~ m/^Domain-0/;
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      for ( my $i = 2; $i < @lines; $i++ ) {
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         my ( $name,$id,$mem,$vcpu,$state,$time) = split( /\s+/, $lines[$i] );
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         $domu{$name}{'id'} = $id;
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         $domu{$name}{'memory'} = $mem;
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         $domu{$name}{'numcpu'} = $vcpu;
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      }
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      return \%domu;
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   }
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my $output = `$xl`;
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   my $output = `xl list`;
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my $hier = &parseOutput( $output );
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   my $hier = &parseXenOutput( $output );
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foreach my $domu ( sort keys %$hier ) {
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   foreach my $domu ( sort keys %$hier ) {
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   my $temp = $$hier{$domu};
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      my $temp = $$hier{$domu};
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   foreach my $key ( sort keys %$temp ) {
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      foreach my $key ( sort keys %$temp ) {
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      print "$CATEGORY\tvirtual\t$domu\t$key\t$$temp{$key}\n";
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         push @out, "$CATEGORY\tvirtual\t$domu\t$key\t$$temp{$key}";
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   }
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      }
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} # foreach
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   } # foreach
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   #####
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   ##### Your code ends here.
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   #####
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}
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# If we are testing from the command line (caller is undef), print the results for debugging
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print join( "\n", @out ) . "\n" unless caller;
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# called by do, which has a value of the last assignment made, so make the assignment. The equivilent of a return
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my $return = join( "\n", @out );
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# if you have not done an exit state above (1 indicating no data), do one
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# here (exit 0 indicates success)
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# NOTE: you can bail early with exit 1 if you can not process anything
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# because it is the wrong system or something
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exit 0;
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