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Add tcsetattr and tcgetattr

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4355 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2012-02-01 16:17:12 +00:00
parent 9473d2192f
commit e154165067
13 changed files with 368 additions and 58 deletions
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lib/termios/Make.defs
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############################################################################
# lib/misc/Make.defs
#
# Copyright (C) 2011-2012 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.
#
############################################################################
TERMIOS_SRCS =
ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
TERMIOS_SRCS += lib_tcgetattr.c lib_tcsetattr.c
endif
lib/termios/lib_tcgetattr.c
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/****************************************************************************
* lib/termios/lib_tcgetattr.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/tioctl.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Variables
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: tcgetattr
*
* Descripton:
* The tcgetattr() function gets the parameters associated with the
* terminal referred to by 'fd' and stores them in the termios structure
* referenced by 'termiosp'.
*
* Input Parameters:
* fd - The 'fd' argument is an open file descriptor associated with a terminal.
* termiosp - The termiosp argument is a pointer to a termios structure.
*
* 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.
* - ENOTTY: The file associated with 'fd' is not a terminal.
*
****************************************************************************/
int tcgetattr(int fd, FAR struct termios *termiosp)
{
return ioctl(fd, TCGETS, (unsigned long)termiosp);
}
lib/termios/lib_tcsetattr.c
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/****************************************************************************
* lib/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/tioctl.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Variables
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: tcsetattr
*
* Descripton:
* 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;
}