IOBSIZE
if (nb > IOBSIZE) {
char buffer[IOBSIZE];
if (Lsp->pr_why == PR_SYSEXIT && nbyte > IOBSIZE) {
int nb = nbyte > IOBSIZE? IOBSIZE : (int)nbyte;
char iob_buf[2*IOBSIZE+8]; /* where prt_iob() leaves its stuff */