SYNOPSIS
        int write_bytes(string file, int start, bytes str)

DESCRIPTION
        Write string str to file file by overwriting the old bytes at
        position start. If start is a negative value then it will be
        counted from the end of the file. The file will not be
        appended, instead the function will be aborted. Returns 1 for
        success 0 for failure during execution.

        Note: since version 3.2@232, write_bytes() is able to append
        to the file.

SEE ALSO
        save_object(E), write_file(E)