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