sysdeps/nacl/isatty.c

   1 /* Determine if a file descriptor refers to a terminal.  NaCl version.
   2    Copyright (C) 2015-2016 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <unistd.h>
  21 #include <nacl-interfaces.h>
  22
  23 /* Return 1 if FD is a terminal, 0 if not.  */
  24 int
  25 __isatty (int fd)
  26 {
  27   int result;
  28   int error = __nacl_irt_dev_fdio.isatty (fd, &result);
  29   if (error == 0)
  30     {
  31       if (result)
  32         return 1;
  33       error = ENOTTY;
  34     }
  35   errno = error;
  36   return 0;
  37 }
  38 weak_alias (__isatty, isatty)