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[/] [openrisc/] [trunk/] [gnu-old/] [newlib-1.17.0/] [libgloss/] [or32/] [isatty.c] - Blame information for rev 816

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Line No. Rev Author Line
1 180 jeremybenn
/* isatty.c. Implementation of the _isatty syscall for newlib
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   Copyright (C) 2004, Jacob Bower
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   Copyright (C) 2010, Embecosm Limited <info@embecosm.com>
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   Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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   This file is part of Newlib.
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   The original work by Jacob Bower is provided as-is without any kind of
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   warranty. Use it at your own risk!
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   All subsequent work is bound by version 3 of the GPL as follows.
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   This program is free software; you can redistribute it and/or modify it
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   under the terms of the GNU General Public License as published by the Free
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   Software Foundation; either version 3 of the License, or (at your option)
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   any later version.
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   This program is distributed in the hope that it will be useful, but WITHOUT
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   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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   more details.
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   You should have received a copy of the GNU General Public License along
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   with this program.  If not, see <http:#www.gnu.org/licenses/>.             */
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/* -------------------------------------------------------------------------- */
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/* This program is commented throughout in a fashion suitable for processing
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   with Doxygen.                                                              */
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/* -------------------------------------------------------------------------- */
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#include <errno.h>
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#include <unistd.h>
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36 198 jeremybenn
#undef ERRNO
37 180 jeremybenn
extern int  errno;
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/* -------------------------------------------------------------------------- */
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/*!Is a file a TTY?
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   We only support stdout and stderr to the console, so we are always a TTY
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   for these.
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   Remember that this function is *not* reentrant, so no static state should
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   be held.
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   @param[in] file  The fileno to check.
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   @return  1 if we are a TTY, 0 otherwise, with an error code in the global
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            variable errno.                                                   */
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/* -------------------------------------------------------------------------- */
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int
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_isatty (int   file)
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{
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  if ((file == STDOUT_FILENO) || (file == STDERR_FILENO))
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    {
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      return  1;
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    }
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  else
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    {
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      errno = EBADF;
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      return  -1;
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    }
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}       /* _isatty () */

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