| /**************************************************************************** |
| * libs/libc/spawn/lib_psfa_adddup2.c |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * 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 <nuttx/config.h> |
| |
| #include <stdlib.h> |
| #include <spawn.h> |
| #include <assert.h> |
| #include <errno.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| |
| #include <nuttx/spawn.h> |
| |
| #include "libc.h" |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: posix_spawn_file_actions_adddup2 |
| * |
| * Description: |
| * The posix_spawn_file_actions_adddup2() function adds a dup2 operation to |
| * the list of operations associated with the object referenced by |
| * file_actions, for subsequent use in a call to posix_spawn() or |
| * posix_spawnp(). The descriptor referred to by fd2 is created as |
| * if dup2() had been called on fd1 prior to the new child process |
| * starting execution. |
| * |
| * Input Parameters: |
| * file_actions - The posix_spawn_file_actions_t to append the action. |
| * fd1 - The first file descriptor to be argument to dup2. |
| * fd2 - The second file descriptor to be argument to dup2. |
| * |
| * Returned Value: |
| * On success, these functions return 0; on failure they return an error |
| * number from <errno.h>. |
| * |
| ****************************************************************************/ |
| |
| int posix_spawn_file_actions_adddup2( |
| FAR posix_spawn_file_actions_t *file_actions, |
| int fd1, int fd2) |
| { |
| FAR struct spawn_dup2_file_action_s *entry; |
| |
| DEBUGASSERT(file_actions && fd1 >= 0 && fd2 >= 0); |
| |
| /* Allocate the action list entry */ |
| |
| entry = (FAR struct spawn_dup2_file_action_s *) |
| lib_zalloc(sizeof(struct spawn_dup2_file_action_s)); |
| |
| if (!entry) |
| { |
| return ENOMEM; |
| } |
| |
| /* Initialize the file action entry */ |
| |
| entry->action = SPAWN_FILE_ACTION_DUP2; |
| entry->fd1 = fd1; |
| entry->fd2 = fd2; |
| |
| /* And add it to the file action list */ |
| |
| add_file_action(file_actions, |
| (FAR struct spawn_general_file_action_s *)entry); |
| return OK; |
| } |