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