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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: get information on lvm2 partitions
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use version ; our $VERSION = 'v1.0.0';
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our $VERSION = '1.0';
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# Template for modules to be used in sysinfo
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# Linux lvm2
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# Author: R. W. Rodolico
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# Author: R. W. Rodolico
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# Date:  2017-11-24
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# Date:   2017-11-24
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#
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# get some information on lvm2
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# # get some information on lvm2
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#
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# Revision History
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#
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#
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# find our location and use it for searching for libraries
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# find our location and use it for searching for libraries. library.pm must be in the same directory as the calling script
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# or, if run interactively, in the parent of the modules
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BEGIN {
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BEGIN {
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   use FindBin;
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   use FindBin;
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   use File::Spec;
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   use File::Spec;
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   use lib File::Spec->catdir($FindBin::Bin);
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   # prepend the bin directory and its parent
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   eval( 'use library;' ); die "Could not find library.pm in the code directory\n" if $@;
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   use lib File::Spec->catdir($FindBin::Bin), File::Spec->catdir("$FindBin::Bin/..");
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   eval( 'use Data::Dumper;' );
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   eval( 'use library;' );
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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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}
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}
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#####
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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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        'Data::Dumper'     => undef,
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   };
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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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my $commandsList = {
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        'lvs' => undef,
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        'vgs' => undef,
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        'pvs' => 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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# check for valid OS.
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exit 1 unless &checkOS( { 'linux' => undef } );
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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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# script returns a 2
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foreach my $command ( 'vgs','pvs','lvs' ) {
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   exit 2 unless &validCommandOnSystem( $command );
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}
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# category we will use for all values found
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# the category the return data should go into. See sysinfo for a list
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# see sysinfo for a list of valid categories
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my $CATEGORY = 'diskinfo';
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my $CATEGORY = 'diskinfo';
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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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for my $module ( keys %$modulesList ) {
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   eval ( "use $module;" );
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   push @out, "$errorPrepend Could not load $module" if $@;
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}
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if ( ! @out && ! checkOS ( $osList ) ) { # check if we are on an acceptible operating system
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    push @out, "$errorPrepend Invalid Operating System";
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}
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if ( !@out && ! validCommandOnSystem ( $commandsList ) ) {
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   push @out, "$errorPrepend Can not find some commands needed";
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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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my @output;
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   #####
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my @temp;
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   my @temp;
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   my @output;
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my $line;
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   my $line;
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my %pv;
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   my %pv;
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my %vg;
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   my %vg;
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my %lv;
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   my %lv;
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my $name;
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   my $name;
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@output = qx( pvs --units k --noheadings );
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   @output = qx( pvs --units k --noheadings );
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# this outputs several lines like the following
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   # this outputs several lines like the following
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#  /dev/md0   vg-md0 lvm2 a--  5860147200.00k 6995968.00k
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   #  /dev/md0   vg-md0 lvm2 a--  5860147200.00k 6995968.00k
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chomp @output;
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   chomp @output;
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foreach $line ( @output ) {
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   foreach $line ( @output ) {
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   @temp = split( /\s+/, $line );
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      @temp = split( /\s+/, $line );
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   $name = $temp[1];
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      $name = $temp[1];
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   $pv{$name}{'vg'} = $temp[2];
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      $pv{$name}{'vg'} = $temp[2];
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   $pv{$name}{'size'} = $temp[5];
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      $pv{$name}{'size'} = $temp[5];
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   $pv{$name}{'size'} =~ s/k//;
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      $pv{$name}{'size'} =~ s/k//;
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   $pv{$name}{'size'} = int( $pv{$name}{'size'} );
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      $pv{$name}{'size'} = int( $pv{$name}{'size'} );
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   $pv{$name}{'free'} = $temp[5];
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      $pv{$name}{'free'} = $temp[5];
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   $pv{$name}{'free'} =~ s/k//;
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      $pv{$name}{'free'} =~ s/k//;
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   $pv{$name}{'free'} = int( $pv{$name}{'free'} );
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      $pv{$name}{'free'} = int( $pv{$name}{'free'} );
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}
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   }
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# following outputs something like this
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   # following outputs something like this
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#  vg-md0   1   9   0 wz--n- 5860147200.00k 6995968.00k
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   #  vg-md0   1   9   0 wz--n- 5860147200.00k 6995968.00k
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@output = qx( 'vgs' --units k --noheadings );
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   @output = qx( 'vgs' --units k --noheadings );
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chomp @output;
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   chomp @output;
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foreach $line ( @output ) {
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   foreach $line ( @output ) {
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   @temp = split( /\s+/, $line );
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      @temp = split( /\s+/, $line );
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   $name = $temp[1];
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      $name = $temp[1];
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   $vg{$name}{'size'} = $temp[6];
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      $vg{$name}{'size'} = $temp[6];
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   $vg{$name}{'size'} =~ s/k//;
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      $vg{$name}{'size'} =~ s/k//;
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   $vg{$name}{'size'} = int( $vg{$name}{'size'} );
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      $vg{$name}{'size'} = int( $vg{$name}{'size'} );
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   $vg{$name}{'free'} = $temp[7];
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      $vg{$name}{'free'} = $temp[7];
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   $vg{$name}{'free'} =~ s/k//;
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      $vg{$name}{'free'} =~ s/k//;
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   $vg{$name}{'free'} = int( $vg{$name}{'free'} );
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      $vg{$name}{'free'} = int( $vg{$name}{'free'} );
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}
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   }
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# outputs something like this
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   # outputs something like this
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#  centos                      vg-md0 -wi-ao--   10485760.00k
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   #  centos                      vg-md0 -wi-ao--   10485760.00k
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@output = qx( lvs --units k --noheadings );
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   @output = qx( lvs --units k --noheadings );
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chomp @output;
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   chomp @output;
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foreach $line ( @output ) {
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   foreach $line ( @output ) {
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   @temp = split( /\s+/, $line );
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      @temp = split( /\s+/, $line );
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   $name = $temp[1];
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      $name = $temp[1];
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   $lv{$name}{'vg'} = $temp[2];
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      $lv{$name}{'vg'} = $temp[2];
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   $lv{$name}{'size'} = $temp[4];
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      $lv{$name}{'size'} = $temp[4];
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   $lv{$name}{'size'} =~ s/k//;
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      $lv{$name}{'size'} =~ s/k//;
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   $lv{$name}{'size'} = int( $lv{$name}{'size'} );
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      $lv{$name}{'size'} = int( $lv{$name}{'size'} );
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}
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   }
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my @results;
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   my @out;
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foreach $line ( keys %lv ) {
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   foreach $line ( keys %lv ) {
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   push @results, "$CATEGORY\t$line\tsize\t" . $lv{$line}{'size'};
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      push @out, "$CATEGORY\t$line\tsize\t" . $lv{$line}{'size'};
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   push @results, "$CATEGORY\t$line\tfstype\tlvm2 lv";
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      push @out, "$CATEGORY\t$line\tfstype\tlvm2 lv";
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   push @results, "$CATEGORY\t$line\tvg\t" . $lv{$line}{'vg'};
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      push @out, "$CATEGORY\t$line\tvg\t" . $lv{$line}{'vg'};
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}
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   }
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foreach $line ( keys %vg ) {
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   foreach $line ( keys %vg ) {
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   push @results, "$CATEGORY\t$line\tsize\t" . $vg{$line}{'size'};
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      push @out, "$CATEGORY\t$line\tsize\t" . $vg{$line}{'size'};
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   push @results, "$CATEGORY\t$line\tused\t" . ( $vg{$line}{'size'} - $vg{$line}{'free'}) ;
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      push @out, "$CATEGORY\t$line\tused\t" . ( $vg{$line}{'size'} - $vg{$line}{'free'}) ;
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   push @results, "$CATEGORY\t$line\tfstype\tlvm2 vg";
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      push @out, "$CATEGORY\t$line\tfstype\tlvm2 vg";
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   my @components;
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      my @components;
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   foreach my $pv ( keys %pv ) {
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      foreach my $pv ( keys %pv ) {
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      if ( $pv{$pv}{'vg'} eq $line ) {
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         if ( $pv{$pv}{'vg'} eq $line ) {
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         push @components, $pv;
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            push @components, $pv;
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         }
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      }
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      }
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      push @out, "$CATEGORY\t$line\tcomponents\t" . join( ' ', @components );
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   }
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   }
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   push @results, "$CATEGORY\t$line\tcomponents\t" . join( ' ', @components );
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}
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foreach $line ( keys %pv ) {
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   foreach $line ( keys %pv ) {
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   push @results, "$CATEGORY\t$line\tsize\t" . $pv{$line}{'size'};
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      push @out, "$CATEGORY\t$line\tsize\t" . $pv{$line}{'size'};
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   push @results, "$CATEGORY\t$line\tfstype\tlvm2 pv";
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      push @out, "$CATEGORY\t$line\tfstype\tlvm2 pv";
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   }
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 159 
   #####
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 160 
   ##### Your code ends here.
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   #####
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}
 162 
}
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# If we are testing from the command line (caller is undef), print the results for debugging
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 165 
print join( "\n", @out ) . "\n" unless caller;
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 166 
# 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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print join( "\n", @results ) . "\n";
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exit 0;
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