USBPRN_PRINT_MAXLINE
char pbuf[USBPRN_PRINT_MAXLINE];
if (len <= USBPRN_PRINT_MAXLINE) {
bcopy(tmp, pbuf, USBPRN_PRINT_MAXLINE);
tmp += USBPRN_PRINT_MAXLINE;
len -= USBPRN_PRINT_MAXLINE;