FILE _iob[OPEN_MAX] = {    /* stdin, stdout, stderr: */
    { 0, (char *) 0, (char *) 0, _READ, 0 },
    { 0, (char *) 0, (char *) 0, _WRITE, 1 }, 
    { 0, (char *) 0, (char *) 0, _WRITE | _UNBUF, 2 }
};