72 lines
3.0 KiB
C
72 lines
3.0 KiB
C
/****************************************************************************
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* libc/termios/lib_tcflush.c
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Alan Carvalho de Assis
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*
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* Source:
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* https://github.com/raggi/apue.2e/blob/master/termios/isatty.c
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* based on Advanced Programming in the UNIX Environment
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <termios.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: isatty
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*
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* Description:
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* Return a non-zero (true) value if the file descriptor, fd, corresponds
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* to a TTYY.
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*
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* NOTE: Nuttx, of course, does not have true TTYs in the sense that this
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* function is intended. In this implementation, the function simply
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* returns true if the file descriptor is associated with a driver that
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* responds wo tcgetattr() without an error -- that it, the driver supports
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* the NuttX TCGETS ioctl command.
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*
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* Of course, that can only be true if CONFIG_SERIAL_TERMIOS=y.
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*
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****************************************************************************/
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int isatty(int fd)
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{
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struct termios ts;
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return (tcgetattr(fd, &ts) >= 0);
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}
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