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Diffstat (limited to 'nuttx/lib/termios/lib_tcsetattr.c')
-rw-r--r-- | nuttx/lib/termios/lib_tcsetattr.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/nuttx/lib/termios/lib_tcsetattr.c b/nuttx/lib/termios/lib_tcsetattr.c new file mode 100644 index 000000000..791b519c8 --- /dev/null +++ b/nuttx/lib/termios/lib_tcsetattr.c @@ -0,0 +1,122 @@ +/**************************************************************************** + * 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/serial/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; +} |