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

# Description: Disk usage for BSD Unix systems

our $VERSION = '1.3';

# BSD disks module for sysinfo client
# Author: R. W. Rodolico
# Date:  2017-11-24

# gets information on disks. Returns them as a hash
# uses standard df -kT and parses the output
# skips anything that does not have a device with /dev in it
# assumes the structure of the output is:
# device fstype size usedSpace availableSpace percentSpace mountPoint
# however, the output can sometimes wrap to multi lines, especially if the 
# device is long. So, we will replace all newlines with spaces, then 
# remove space duplications, then split on spaces and process each item in
# turn.
# NOTE: this will totally break if you have spaces in your mount point
#
# v1.3 20180424 RWR
# Fixed bug when diskinfo generates an error. Will still send error
# to STDERR, but will not break program.

BEGIN {
   push @INC, shift;
}

use library;

exit 1 unless &getOperatingSystem() =~ m/bsd/i;

# the commands this script will use
my %commands = ( 
                  'sysctl' => ''
               );

# check the commands for validity
foreach my $command ( keys %commands ) {
   $commands{$command} = &validCommandOnSystem( $command );
}

exit 1 unless $commands{'sysctl'};
               
my $temp;
my $device;
my @temp;
my $CATEGORY = 'diskinfo';


$temp = getSysctlParameter( $commands{ 'sysctl' }, 'kern.disks' );
my @disks =  split( /\s+/, $temp );
foreach $device ( @disks ) {
   next unless eval { $temp = qx( diskinfo $device ); };
   chomp $temp;
   my @info =  split( /\s+/, $temp );
   $temp = $info[2] / 1024;
   print "$CATEGORY\t/dev/$device\tsize\t$temp\n";
}