Name
telldir — return current location in directory stream
Synopsis
#include <dirent.h>
long
telldir( |
DIR *dirp); |
![[Note]](../stylesheet/note.png) |
Note | ||||
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DESCRIPTION
The telldir() function
returns the current location associated with the directory
stream dirp.
RETURN VALUE
On success, the telldir()
function returns the current location in the directory
stream. On error, −1 is returned, and errno is set appropriately.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
telldir() |
Thread safety | MT-Safe |
NOTES
In glibc up to version 2.1.1, the return type of
telldir() was off_t. POSIX.1-2001 specifies long, and this is the type used since glibc
2.1.2.
In early filesystems, the value returned by telldir() was a simple file offset within a
directory. Modern filesystems use tree or hash structures,
rather than flat tables, to represent directories. On such
filesystems, the value returned by telldir() (and used internally by readdir(3)) is a "cookie"
that is used by the implementation to derive a position
within a directory. Application programs should treat this
strictly as an opaque value, making no assumptions about its contents.
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 1993 David Metcalfe (davidprism.demon.co.uk) %%%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 Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date.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 References consulted: Linux libc source code Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) 386BSD man pages Modified Sat Jul 24 17:48:42 1993 by Rik Faith (faithcs.unc.edu) |