FNULL
if (progfp != FNULL && (c = fgetwc(progfp)) != WEOF)
if (progfp != FNULL) {
progfp = FNULL;
== FNULL) {
if (progfp != FNULL) {
fp->f_fp = FNULL;
return (FNULL);
if ((awkinfp = fopen(mbunconvert(arg), r)) == FNULL) {
if (op->f_fp != FNULL)
if ((fp = openfile(np->n_right, 0, 0)) != FNULL) {
if (awkinfp == FNULL)
if (op->f_fp == FNULL) {
if ((fp = fopen(cp, w)) != FNULL) {
if (fp != FNULL) {
op->f_fp = FNULL;
if (fp == FNULL && (fp = newfile()) == FNULL)
awkinfp = fp = FNULL;
if (op->f_fp!=FNULL && strcmp(name, op->f_name)==0) {