Function nl_file

src/nl.c:457–495

   Return true if successful.  */

static bool
nl_file (char const *file)
{
  FILE *stream;

  if (streq (file, "-"))
    {
      have_read_stdin = true;
      stream = stdin;
      assume (stream);  /* Pacify GCC bug#109613.  */
    }
  else
    {
      stream = fopen (file, "r");
      if (stream == NULL)
        {
          error (0, errno, "%s", quotef (file));
          return false;
        }
    }

  fadvise (stream, FADVISE_SEQUENTIAL);

  process_file (stream);

  int err = errno;
  if (!ferror (stream))
    err = 0;
  if (streq (file, "-"))
    clearerr (stream);		/* Also clear EOF. */
  else if (fclose (stream) != 0 && !err)
    err = errno;
  if (err)
    {
      error (0, err, "%s", quotef (file));
      return false;
    }
  return true;
}

int
main (int argc, char **argv)