Function known_value

src/df.c:853–857

Return true if N is a known integer value. On many file systems, UINTMAX_MAX represents an unknown value; on AIX, UINTMAX_MAX - 1 represents unknown. Use a rule that works on AIX file systems, and that almost-always works on other types. */

   represents unknown.  Use a rule that works on AIX file systems, and
   that almost-always works on other types.  */
static bool
known_value (uintmax_t n)
{
  return n < UINTMAX_MAX - 1;
}

/* Like human_readable (N, BUF, human_output_opts, INPUT_UNITS, OUTPUT_UNITS),
   except: