x_fp
(void) fclose(cx.x_fp);
cx.x_fp = fopen(filename, "r");
if (cx.x_fp == 0)
(void) fcntl(fileno(cx.x_fp), F_SETFD, 1);
c = getc(cx.x_fp);
return ungetc(c, cx.x_fp);
x->x_fp = infp;
fd = fileno(x->x_fp);
nread = fread(buf, len, 1, x->x_fp);
FILE *x_fp;