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-'\" t
-.\" Copyright (C) 1993 David Metcalfe (david@prism.demon.co.uk)
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" References consulted:
-.\" Linux libc source code
-.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
-.\" 386BSD man pages
-.\" Modified Sat Jul 24 18:46:01 1993 by Rik Faith (faith@cs.unc.edu)
-.\" Modified 11 June 1995 by Andries Brouwer (aeb@cwi.nl)
-.\" 2007-07-30 Ulrich Drepper <drepper@redhat.com>: document fdopendir().
-.TH opendir 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-opendir, fdopendir \- open a directory
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <sys/types.h>
-.B #include <dirent.h>
-.P
-.BI "DIR *opendir(const char *" name );
-.BI "DIR *fdopendir(int " fd );
-.fi
-.P
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR fdopendir ():
-.nf
- Since glibc 2.10:
- _POSIX_C_SOURCE >= 200809L
- Before glibc 2.10:
- _GNU_SOURCE
-.fi
-.SH DESCRIPTION
-The
-.BR opendir ()
-function opens a directory stream corresponding to the
-directory \fIname\fP, and returns a pointer to the directory stream.
-The stream is positioned at the first entry in the directory.
-.P
-The
-.BR fdopendir ()
-function
-is like
-.BR opendir (),
-but returns a directory stream for the directory referred
-to by the open file descriptor
-.IR fd .
-After a successful call to
-.BR fdopendir (),
-.I fd
-is used internally by the implementation,
-and should not otherwise be used by the application.
-.SH RETURN VALUE
-The
-.BR opendir ()
-and
-.BR fdopendir ()
-functions return a pointer to the directory stream.
-On error, NULL is returned, and
-.I errno
-is set to indicate the error.
-.SH ERRORS
-.TP
-.B EACCES
-Permission denied.
-.TP
-.B EBADF
-.I fd
-is not a valid file descriptor opened for reading.
-.TP
-.B EMFILE
-The per-process limit on the number of open file descriptors has been reached.
-.TP
-.B ENFILE
-The system-wide limit on the total number of open files has been reached.
-.TP
-.B ENOENT
-Directory does not exist, or \fIname\fP is an empty string.
-.TP
-.B ENOMEM
-Insufficient memory to complete the operation.
-.TP
-.B ENOTDIR
-\fIname\fP is not a directory.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface Attribute Value
-T{
-.na
-.nh
-.BR opendir (),
-.BR fdopendir ()
-T} Thread safety MT-Safe
-.TE
-.SH STANDARDS
-POSIX.1-2008.
-.SH STANDARDS
-.TP
-.BR opendir ()
-SVr4, 4.3BSD, POSIX.1-2001.
-.TP
-.BR fdopendir ()
-POSIX.1-2008.
-glibc 2.4.
-.SH NOTES
-Filename entries can be read from a directory stream using
-.BR readdir (3).
-.P
-The underlying file descriptor of the directory stream can be obtained using
-.BR dirfd (3).
-.P
-The
-.BR opendir ()
-function sets the close-on-exec flag for the file descriptor underlying the
-.IR "DIR *" .
-The
-.BR fdopendir ()
-function leaves the setting of the close-on-exec
-flag unchanged for the file descriptor,
-.IR fd .
-POSIX.1-200x leaves it unspecified whether a successful call to
-.BR fdopendir ()
-will set the close-on-exec flag for the file descriptor,
-.IR fd .
-.SH SEE ALSO
-.BR open (2),
-.BR closedir (3),
-.BR dirfd (3),
-.BR readdir (3),
-.BR rewinddir (3),
-.BR scandir (3),
-.BR seekdir (3),
-.BR telldir (3)