toolchain/gcc/newlib/libc/sys/mmixware/isatty.c

   1 /* isatty for MMIXware.
   2
   3    Copyright (C) 2001 Hans-Peter Nilsson
   4
   5    Permission to use, copy, modify, and distribute this software is
   6    freely granted, provided that the above copyright notice, this notice
   7    and the following disclaimer are preserved with no changes.
   8
   9    THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  10    IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  11    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  12    PURPOSE.  */
  13
  14 #include <_ansi.h>
  15 #include <sys/types.h>
  16 #include <sys/stat.h>
  17 #include "sys/syscall.h"
  18
  19 isatty (fd)
  20      int fd;
  21 {
  22   return fd == 0 || fd == 1 || fd == 2;
  23 }