/**************************************************************************** * libc/unistd/lib_pipe.c * * Copyright (C) 2016 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 <unistd.h> #include <nuttx/drivers/drivers.h> #if defined(CONFIG_PIPES) && CONFIG_DEV_PIPE_SIZE > 0 /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: pipe * * Description: * pipe() creates a pair of file descriptors, pointing to a pipe inode, * and places them in the array pointed to by 'fd'. fd[0] is for reading, * fd[1] is for writing. * * Inputs: * fd[2] - The user provided array in which to catch the pipe file * descriptors * * Return: * 0 is returned on success; otherwise, -1 is returned with errno set * appropriately. * ****************************************************************************/ int pipe(int fd[2]) { return pipe2(fd, CONFIG_DEV_PIPE_SIZE); } #endif /* CONFIG_PIPES && CONFIG_DEV_PIPE_SIZE > 0 */