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#!/usr/bin/env perl
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use warnings;
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use strict;  
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# Description: Use smartctl to get disk information
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our $VERSION = '1.0';
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# R. W. Rodolico
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# grabs smart readings from all drives in system
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# note that in the case of some hardware RAID controller, will list the components of a "drive" and the drive itself,
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# so you may have up to twice the number of entries than you have physical drives, for example, if you have a megaraid
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# controller where each physical drive is also a single logical drive.
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BEGIN {
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   push @INC, shift;
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}
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use library;
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exit 0 unless checkDate( 'w' ); # run this only on Mondays
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sub trim {
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 my $value = shift;
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 $value =~ s/^\s+|\s+$//g;
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 return $value;
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}
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sub getSmartReport {
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   my ($drive, $type) = @_;
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   my @report = `smartctl -a $drive $type`;
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   chomp @report;
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   return @report;
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}
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sub getTotalWrites {
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 my @report = @_;
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 return -2 unless grep{ /(Solid State Device)|(SSD)/ } @report;
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 my @temp = grep{ /^Sector Size:/ } @report;
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 my $sectors = shift @temp;
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#   print "The Value is [$sectors]\n"; die;
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 if ( $sectors =~ m/^Sector Size\:\s+(\d+)\s+bytes/ ) {
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    $sectors = $1;
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    # print "Sectors is $sectors\n"; die;
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    @temp =  grep{ /^241/ } @report;
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    my $lbas = $temp[0];
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    if ( $lbas =~ m/(\d+)\s*$/ ) {
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       $lbas = $1;
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       return $lbas * $sectors;
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    } else {
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       return -3;
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    }
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 } else { 
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    return -4; 
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 }
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 return -1; # we could not find something
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}
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sub getInformation {
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   my @report = @_;
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   my %info;
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   my %keys = ( 
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                  'Model Family:'  => { 
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                                          'tag' => 'Make',
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                                          'regex' => '(.*)'
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                                      },
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                  'Device Model:'  => { 
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                                          'tag' => 'Model',
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                                          'regex' => '(.*)'
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                                      },
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                  'Serial number:' => { 
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                                          'tag' => 'Serial',
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                                          'regex' => '(.*)'
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                                      },
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                  'Serial Number:' => { 
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                                          'tag' => 'Serial',
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                                          'regex' => '(.*)'
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                                      },
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                  'User Capacity:' => { 
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                                          'tag' => 'Capacity',
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                                          'regex' => '([0-9,]+)'
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                                      },
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                  'Logical block size:' =>{ 
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                                          'tag' => 'Sector Size',
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                                          'regex' => '(\d+)'
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                                      },
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                  'Sector Size:'   => { 
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                                          'tag' => 'Sector Size',
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                                          'regex' => '(\d+)'
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                                      },
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                  'Rotation Rate:' => { 
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                                          'tag' => 'Rotation',
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                                          'regex' => '(.*)'
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                                      }
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               );
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   foreach my $key ( keys %keys ) {
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      my @temp = grep { /^$key/ } @report;
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      if ( @temp ) {
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         $temp[0] =~ m/^$key\s+(.*)$/;
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         my $value = $1;
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         $value =~ m/$keys{$key}->{'regex'}/;
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         $info{$keys{$key}->{'tag'}} = $1;
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      }
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   }
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   # remove comma's from capacity
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   $info{'Capacity'} =~ s/,//g if $info{'Capacity'};
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   return \%info;
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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 = 'attributes';
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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 '' if it does not exist
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# cleanUp - passed a delimiter and a string, does the following (delimiter can be '')
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#           chomps the string (removes trailing newlines)
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#           removes all text BEFORE the delimiter, the delimiter, and any whitespace
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#           thus, the string 'xxI Am x  a weird string' with a newline will become
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#           'a weird string' with no newline
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# now, return the tab delimited output (to STDOUT). $CATEGORY is the first
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# item, name as recognized by sysinfo is the second and the value is
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# the last one. For multiple entries, place on separate lines (ie, newline separated)
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# check for commands we want to run
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my %commands = ( 
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                  'smartctl' => '',
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               );
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# check the commands for validity
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foreach my $command ( keys %commands ) {
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   $commands{$command} = &validCommandOnSystem( $command );
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}
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# bail if we don't have the commands we need
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exit 1 unless $commands{'smartctl'};
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# Get all the drives on the system
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my %allDrives = map { $_ =~ '(^[a-z0-9/]+)\s+(.*)\#'; ($1,$2) } `smartctl --scan`;
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#foreach my $key ( keys %allDrives ) { print "$key\t$allDrives{$key}\n"; } die;
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# output the drives and information as tab delimited,
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foreach my $thisDrive ( sort keys %allDrives ) {
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 #print "$thisDrive\n";
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 print "$CATEGORY\t$thisDrive Type\t$allDrives{$thisDrive}\n";
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 my @report = &getSmartReport( $thisDrive, $allDrives{$thisDrive} );
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 #print join( "\n", @report ) . "\n"; die;
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 my $writes = &getTotalWrites( @report );
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 my $info = &getInformation( @report );
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 $info->{'writes'} = $writes if $writes > 0;
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 #print Dumper( $info );
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 foreach my $key ( keys %$info ) {
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    print "$CATEGORY\t$thisDrive $key\t" . $info->{$key} . "\n";
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 }
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}
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exit 0;