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    my (undef, $dirs, $filename) = File::Spec->splitpath($name);
    my @parts = File::Spec->splitdir($dirs);
    push @parts, $filename;
    die "Directory traversal attempted: $name\n" unless (File::Spec->no_upwards(@parts) == @parts);
  
    mkpath(File::Spec->catdir($rootdir, $dirs)); 
    my $writename = File::Spec->catfile($rootdir, $dirs, $filename);
    
    write_file($writename, {binmode => ':raw'}, $file->contents );

    chmod $file->mode, $writename or warn "$0: chmod $writename: $!\n";
    if ($> == 0) {
        chown $file->uid, $file->gid, $writename or warn "$0: chown $writename: $!\n";
    }
}

=head1 NAME

mboxextract - extract mbox archive

=head1 USAGE