#!/usr/bin/perl -w

use ycp;
use File::Temp;

# Returns free space in a directory
# @example: SCR::Read(.system.freespace, "/tmp") -> 'size in bytes' or '-1'

while ( <STDIN> ) {
    my ($command, $path, $directory) = ycp::ParseCommand ($_);

    if ($command eq 'Read') {
	if ($path eq '.' && defined $directory) {
	    if (!$directory) {
		y2error ('Directory must be defined');
		ycp::Return -1;
		next;
	    }
	    if (! -e $directory) {
		y2error ('Directory '.$directory.' does not exist');
		ycp::Return -1;
		next;
	    }
	    if (! -d $directory) {
		y2error ('Object '.$directory.' is not a directory');
		ycp::Return -1;
		next;
	    }

	    my $command = '/bin/df';
	    if (!-x $command) {
		y2error('Cannot execute '.$command.' command');
		ycp::Return -1;
		next;
	    }

	    # esacping quoting
	    $directory =~ s/\"/\\\"/g;
	    # -P, --portability: Use the POSIX output format
	    $command = `$command -P "$directory"`;
	    # first line of out is the header
	    my @out = split(/\n/, $command);
	    if (defined $out[1]) {
	       @out = split(/ +/, $out[1]);
	    }
	    
	    if (defined $out[3]) {
		ycp::Return $out[3];
		next;
	    } else {
		y2error ('Cannot determine the free space in "'.$directory.'" - Unknown error: '.$command);
		ycp::Return -1;
		next;
	    }
	} else {
	    y2error ('Wrong arguments');
	    ycp::Return -1;
	    next;
	}
    } elsif ($command eq 'result') {
	exit 0;
    } else {
        y2error ('Wrong path or arguments');
        ycp::Return -1;
	next;
    }
}
