sub NetSNMPGetOpts {
    my %ret;
    my $rootpath = shift;
    $rootpath = "../" if (!$rootpath);
    $rootpath .= '/' if ($rootpath !~ /\/$/);
    
    if (($Config{'osname'} eq 'MSWin32' && $ENV{'OSTYPE'} ne 'msys')) {

      # Grab command line options first.  Only used if environment variables are not set
      GetOptions("NET-SNMP-IN-SOURCE=s" => \$ret{'insource'},
        "NET-SNMP-PATH=s"      => \$ret{'prefix'},          
        "NET-SNMP-DEBUG=s"     => \$ret{'debug'});

      if ($ENV{'NET-SNMP-IN-SOURCE'})
      {
	$ret{'insource'} = $ENV{'NET-SNMP-IN-SOURCE'};
        undef ($ret{'prefix'});
      }
      elsif ($ENV{'NET-SNMP-PATH'})
      {
	$ret{'prefix'} = $ENV{'NET-SNMP-PATH'};
      }

      if ($ENV{'NET-SNMP-DEBUG'})
      {
	$ret{'debug'} = $ENV{'NET-SNMP-DEBUG'};
      }

      # Update environment variables in case they are needed
      $ENV{'NET-SNMP-IN-SOURCE'}    = $ret{'insource'};
      $ENV{'NET-SNMP-PATH'}         = $ret{'prefix'};
      $ENV{'NET-SNMP-DEBUG'}        = $ret{'debug'};        
     
      $basedir = `%COMSPEC% /c cd`;
      chomp $basedir;
      $basedir =~ /(.*?)\\perl.*/;
      $basedir = $1;
      print "Net-SNMP base directory: $basedir\n";

    }
    else
    {
      if ($ENV{'NET-SNMP-CONFIG'} && 
        $ENV{'NET-SNMP-IN-SOURCE'}) {
	# have env vars, pull from there
	$ret{'nsconfig'} = $ENV{'NET-SNMP-CONFIG'};
	$ret{'insource'} = $ENV{'NET-SNMP-IN-SOURCE'};
      } else {
	# don't have env vars, pull from command line and put there
	GetOptions("NET-SNMP-CONFIG=s" => \$ret{'nsconfig'},
	           "NET-SNMP-IN-SOURCE=s" => \$ret{'insource'});

	if (lc($ret{'insource'}) eq "true" && $ret{'nsconfig'} eq "") {
	    $ret{'nsconfig'}="sh ROOTPATH../net-snmp-config";
	} elsif ($ret{'nsconfig'} eq "") {
	    $ret{'nsconfig'}="net-snmp-config";
	}

	$ENV{'NET-SNMP-CONFIG'}    = $ret{'nsconfig'};
	$ENV{'NET-SNMP-IN-SOURCE'} = $ret{'insource'};
      }
    }	
    
    $ret{'nsconfig'} =~ s/ROOTPATH/$rootpath/;

    $ret{'rootpath'} = $rootpath;

    \%ret;
}

sub find_files {
    my($f,$d) = @_;
    my ($dir,$found,$file);
    for $dir (@$d){
	$found = 0;
	for $file (@$f) {
	    $found++ if -f "$dir/$file";
	}
	if ($found == @$f) {
	    return $dir;
	}
    }
}