*put_data = \&_write_file;

sub _write_file {
    my $fmgr = shift;
    my($from, $to, $type) = @_;
    local *FH;
    my($umask, $perms);
    my $cfg = MT->config;
    if ($type && $type eq 'upload') {
        $umask = $cfg->UploadUmask;
        $perms = $cfg->UploadPerms;
    } else {
        $umask = $cfg->HTMLUmask;
        $perms = $cfg->HTMLPerms;
    }
    my $old = umask(oct $umask);
    sysopen FH, $to, O_RDWR|O_CREAT|O_TRUNC, oct $perms
        or return $fmgr->error(MT->translate(
            "Opening local file '[_1]' failed: [_2]", $to, "$!"));
    if ($type && $type eq 'upload') {
        binmode(FH);
        binmode($from) if $fmgr->is_handle($from);
    }
    ## Lock file unless NoLocking specified.
    flock FH, LOCK_EX unless $cfg->NoLocking;
    seek FH, 0, 0;
    truncate FH, 0;
    my $bytes = 0;
    if ($fmgr->is_handle($from)) {
        while (my $len = read $from, my($block), 8192) {
            print FH $block;
            $bytes += $len;
        }
    } else {
        print FH $from;
        $bytes = length($from);
    }
    close FH;
    umask($old);
    $bytes;
}