Name
dirfd — get directory stream file descriptor
Synopsis
#include <sys/types.h> #include <dirent.h>
int
dirfd( |
DIR *dirp); |
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Note | ||||
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DESCRIPTION
The function dirfd() returns
the file descriptor associated with the directory stream
dirp.
This file descriptor is the one used internally by the directory stream. As a result, it is useful only for functions which do not depend on or alter the file position, such as fstat(2) and fchdir(2). It will be automatically closed when closedir(3) is called.
RETURN VALUE
On success, a nonnegative file descriptor is returned. On
error, −1 is returned, and errno is set to indicate the cause of the
error.
ERRORS
POSIX.1-2008 specifies two errors, neither of which is returned by the current implementation.
- EINVAL
-
dirpdoes not refer to a valid directory stream. - ENOTSUP
-
The implementation does not support the association of a file descriptor with a directory.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
dirfd() |
Thread safety | MT-Safe |
CONFORMING TO
POSIX.1-2008. This function was a BSD extension, present in 4.3BSD-Reno, not in 4.2BSD.
SEE ALSO
open(2), closedir(3), opendir(3), readdir(3), rewinddir(3), scandir(3), seekdir(3), telldir(3)
COLOPHON
This page is part of release 4.07 of the Linux man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
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Copyright (C) 2002 Andries Brouwer (aebcwi.nl) %%%LICENSE_START(VERBATIM) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. %%%LICENSE_END |