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+.\" Copyright (C) 1993 David Metcalfe (david@prism.demon.co.uk)
+.\"
+.\" 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+.\" manual page may be incorrect or out-of-date.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.
+.\"
+.\" References consulted:
+.\" Linux libc source code
+.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
+.\" 386BSD man pages
+.\" Modified Sat Jul 24 16:09:49 1993 by Rik Faith (faith@cs.unc.edu)
+.\" Modified 11 June 1995 by Andries Brouwer (aeb@cwi.nl)
+.\" Modified 22 July 1996 by Andries Brouwer (aeb@cwi.nl)
+.\"
+.TH READDIR 3 1996-04-22 "" "Linux Programmer's Manual"
+.SH NAME
+readdir \- read a directory
+.SH SYNOPSIS
+.nf
+.B #include <sys/types.h>
+.sp
+.B #include <dirent.h>
+.sp
+.BI "struct dirent *readdir(DIR *" dir );
+.fi
+.SH DESCRIPTION
+The \fBreaddir()\fP function returns a pointer to a dirent structure
+representing the next directory entry in the directory stream pointed
+to by \fIdir\fP. It returns NULL on reaching the end-of-file or if
+an error occurred.
+.PP
+According to POSIX, the
+.I dirent
+structure contains a field
+.I "char d_name[]"
+of unspecified size, with at most
+.B NAME_MAX
+characters preceding the terminating null character.
+Use of other fields will harm the portability of your programs.
+POSIX 1003.1-2001 also documents the field
+.I "ino_t d_ino"
+as an XSI extension.
+.PP
+The data returned by \fBreaddir()\fP may be overwritten by subsequent
+calls to \fBreaddir()\fP for the same directory stream.
+.SH "RETURN VALUE"
+The \fBreaddir()\fP function returns a pointer to a dirent structure, or
+NULL if an error occurs or end-of-file is reached.
+.SH ERRORS
+.TP
+.B EBADF
+Invalid directory stream descriptor \fIdir\fP.
+.SH "CONFORMING TO"
+SVID 3, BSD 4.3, POSIX 1003.1-2001
+.SH "SEE ALSO"
+.BR read (2),
+.BR closedir (3),
+.BR dirfd (3),
+.BR opendir (3),
+.BR rewinddir (3),
+.BR scandir (3),
+.BR seekdir (3),
+.BR telldir (3)