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