89 lines
3.2 KiB
C
89 lines
3.2 KiB
C
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/****************************************************************************
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* libs/libc/stdio/lib_renameat.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 <stdio.h>
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#include <errno.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: renameat
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*
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* Description:
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* The renameat() system call operates in exactly the same way as rename(),
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* except for the differences described here.
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*
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* If the pathname given in oldpath is relative, then it is interpreted
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* relative to the directory referred to by the file descriptor olddirfd
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* (rather than relative to the current working directory of the calling
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* process, as is done by rename() for a relative pathname).
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*
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* If oldpath is relative and olddirfd is the special value AT_FDCWD, then
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* oldpath is interpreted relative to the current working directory of the
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* calling process (like rename()).
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*
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* If oldpath is absolute, then olddirfd is ignored.
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*
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* The interpretation of newpath is as for oldpath, except that a relative
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* pathname is interpreted relative to the directory referred to by the
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* file descriptor newdirfd.
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*
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* Input Parameters:
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* olddirfd - The file descriptor of old directory.
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* oldpath - A pointer to the old path
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* newdirfd - The file descriptor of new directory.
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* newpath - A pointer to the new path
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*
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* Returned Value:
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* Return zero on success, or -1 if an error occurred (in which case,
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* errno is set appropriately).
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*
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****************************************************************************/
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int renameat(int olddirfd, FAR const char *oldpath,
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int newdirfd, FAR const char *newpath)
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{
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char oldfullpath[PATH_MAX];
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char newfullpath[PATH_MAX];
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int ret;
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ret = lib_getfullpath(olddirfd, oldpath, oldfullpath);
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if (ret >= 0)
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{
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ret = lib_getfullpath(newdirfd, newpath, newfullpath);
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}
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if (ret < 0)
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{
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set_errno(-ret);
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return ERROR;
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}
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return rename(oldfullpath, newfullpath);
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}
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