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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [or32/] [isatty.c] - Rev 453
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/* isatty.c. Implementation of the _isatty syscall for newlib Copyright (C) 2004, Jacob Bower Copyright (C) 2010, Embecosm Limited <info@embecosm.com> Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of Newlib. The original work by Jacob Bower is provided as-is without any kind of warranty. Use it at your own risk! All subsequent work is bound by version 3 of the GPL as follows. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http:#www.gnu.org/licenses/>. */ /* -------------------------------------------------------------------------- */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ /* -------------------------------------------------------------------------- */ #include <errno.h> #include <unistd.h> #undef ERRNO extern int errno; /* -------------------------------------------------------------------------- */ /*!Is a file a TTY? We only support stdout and stderr to the console, so we are always a TTY for these. Remember that this function is *not* reentrant, so no static state should be held. @param[in] file The fileno to check. @return 1 if we are a TTY, 0 otherwise, with an error code in the global variable errno. */ /* -------------------------------------------------------------------------- */ int _isatty (int file) { if ((file == STDOUT_FILENO) || (file == STDERR_FILENO)) { return 1; } else { errno = EBADF; return -1; } } /* _isatty () */
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