_putmessage
(void)_putmessage (msgbuf, type, ap);
int _putmessage ( char *, short, va_list );
int _putmessage (buf, type, arg)
needsize = _putmessage(NULL, type, vp);
needsize = _putmessage(MBP, type, vp);
int _putmessage();
size = _putmessage(buf, type, arg);
rc = _putmessage(svc->msgbuf, type, ap);