80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/****************************************************************************
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* libs/libc/unistd/lib_fchdir.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 <fcntl.h>
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#include <limits.h>
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#include <unistd.h>
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#ifndef CONFIG_DISABLE_ENVIRON
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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: fchdir
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*
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* Description:
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* The fchdir() function changes the current workint directory of the
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* calling process to the directory specified in fd.
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*
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* The fchdir() function is identical to chdir(); the only difference is
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* that the directory is given as an open file diescriptor.
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*
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* Input Parameters:
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* fd - The file descriptor is the one used internally by the directory
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* stream.
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*
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* Returned Value:
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* 0(OK) on success; -1(ERROR) on failure with errno set appropriately:
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*
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* EACCES
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* Search permission was denied on the directory open on fd.
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* EBADF
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* fd is not a valid file descriptor.
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*
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****************************************************************************/
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int fchdir(int fd)
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{
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char path[PATH_MAX];
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int ret;
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ret = fcntl(fd, F_GETPATH, path);
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if (ret < 0)
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{
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return ret;
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}
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return chdir(path);
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}
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#endif /* !CONFIG_DISABLE_ENVIRON */
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