66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/****************************************************************************
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* libs/libc/dirent/lib_dirfd.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 <dirent.h>
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#include <errno.h>
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: dirfd
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*
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* Description:
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* The dirfd() function returns the file descriptor associated
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* with the directory stream dirp.
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*
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* Input Parameters:
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* dirp -- An instance of type DIR created by a previous
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* call to opendir();
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*
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* Returned Value:
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* On success, a nonnegative file descriptor is returned.
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* On error, -1 is returned, and errno is set to indicate
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* the cause of the error.
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*
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* EINVAL - dirp does not refer to a valid directory stream.
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*
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****************************************************************************/
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int dirfd(FAR DIR *dirp)
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{
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if (dirp != NULL)
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{
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return dirp->fd;
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}
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set_errno(EINVAL);
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return -1;
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}
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