/**************************************************************************** * libs/libc/unistd/lib_pipe.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #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. * * Input Parameters: * fd[2] - The user provided array in which to catch the pipe file * descriptors * * Returned Value: * 0 is returned on success; otherwise, -1 is returned with errno set * appropriately. * ****************************************************************************/ int pipe(int fd[2]) { int ret; ret = nx_pipe(fd, CONFIG_DEV_PIPE_SIZE, 0); if (ret < 0) { set_errno(-ret); ret = ERROR; } return ret; } #endif /* CONFIG_PIPES && CONFIG_DEV_PIPE_SIZE > 0 */