forked from Archive/PX4-Autopilot
123 lines
5.3 KiB
C
123 lines
5.3 KiB
C
/****************************************************************************
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* lib/termios/lib_tcsetattr.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 <nuttx/config.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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#include <errno.h>
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#include <nuttx/serial/tioctl.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: tcsetattr
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*
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* Descripton:
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* The tcsetattr() function sets the parameters associated with the
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* terminal referred to by the open file descriptor 'fd' from the termios
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* structure referenced by 'termiop' as follows:
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*
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* If 'options' is TCSANOW, the change will occur immediately.
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*
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* If 'options' is TCSADRAIN, the change will occur after all output
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* written to 'fd' is transmitted. This function should be used when changing
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* parameters that affect output.
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*
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* If 'options' is TCSAFLUSH, the change will occur after all
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* output written to 'fd' is transmitted, and all input so far received but
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* not read will be discarded before the change is made.
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*
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* The tcsetattr() function will return successfully if it was able to
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* perform any of the requested actions, even if some of the requested
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* actions could not be performed. It will set all the attributes that
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* implementation supports as requested and leave all the attributes not
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* supported by the implementation unchanged. If no part of the request
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* can be honoured, it will return -1 and set errno to EINVAL.
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*
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* The effect of tcsetattr() is undefined if the value of the termios
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* structure pointed to by 'termiop' was not derived from the result of
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* a call to tcgetattr() on 'fd'; an application should modify only fields
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* and flags defined by this specification between the call to tcgetattr()
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* and tcsetattr(), leaving all other fields and flags unmodified.
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*
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* Returned Value:
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*
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* Upon successful completion, 0 is returned. Otherwise, -1 is returned
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* and errno is set to indicate the error. The following errors may be
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* reported:
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*
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* - EBADF: The 'fd' argument is not a valid file descriptor.
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* - EINTR: A signal interrupted tcsetattr().
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* - EINVAL: The 'options' argument is not a supported value, or
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* an attempt was made to change an attribute represented in the
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* termios structure to an unsupported value.
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* - ENOTTY: The file associated with 'fd' is not a terminal.
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*
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****************************************************************************/
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int tcsetattr(int fd, int options, FAR const struct termios *termiosp)
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{
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if (options == TCSANOW)
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{
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return ioctl(fd, TCSETS, (unsigned long)termiosp);
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}
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return -ENOSYS;
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}
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