71 lines
2.8 KiB
C
71 lines
2.8 KiB
C
/****************************************************************************
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* libs/libc/termios/lib_tcflow.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: tcflow
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*
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* Description:
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* The tcflow() function will suspend or restart transmission or reception
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* of data on the object referred to by 'fd', depending on the value of
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* 'action'.
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*
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* Input Parameters:
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* fd - An open file descriptor associated with a terminal.
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* action - Describes the action to be performed:
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* TCOOFF - Output will be suspended.
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* TCOON - Suspended output will be restarted.
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* TCIOFF - The system will transmit a STOP character, which is
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* intended to cause the terminal device to stop
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* transmitting data to the system.
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* TCION - The system will transmit a START character, which is
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* intended to cause the terminal device to start
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* transmitting data to the system.
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*
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* The default on the opening of a terminal file is that neither its input
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* nor its output are suspended.
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*
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* Returned Value:
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* Upon successful completion, 0 is returned. Otherwise, -1 is returned and
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* errno is set to indicate the nature of the error.
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*
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****************************************************************************/
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int tcflow(int fd, int action)
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{
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return ioctl(fd, TCXONC, (unsigned long)action);
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}
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