Function xfopen

src/sort.c:1026–1033

   failure.  */

static FILE *
xfopen (char const *file, char const *how)
{
  FILE *fp = stream_open (file, how);
  if (!fp)
    sort_die (_("open failed"), file);
  return fp;
}

/* Close FP, whose name is FILE, and report any errors.  */