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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
commit | 399644e47874bff147afb19c89228901ac39340e (patch) | |
tree | 1c4c0b733f4c16b5783b41bebb19194a9ef62ad1 /man3/telldir.3 | |
parent | Initial commit. (diff) | |
download | manpages-upstream/6.05.01.tar.xz manpages-upstream/6.05.01.zip |
Adding upstream version 6.05.01.upstream/6.05.01
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man3/telldir.3')
-rw-r--r-- | man3/telldir.3 | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/man3/telldir.3 b/man3/telldir.3 new file mode 100644 index 0000000..6bbd158 --- /dev/null +++ b/man3/telldir.3 @@ -0,0 +1,101 @@ +'\" t +.\" Copyright 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 17:48:42 1993 by Rik Faith (faith@cs.unc.edu) +.TH telldir 3 2023-07-20 "Linux man-pages 6.05.01" +.SH NAME +telldir \- return current location in directory stream +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include <dirent.h> +.PP +.BI "long telldir(DIR *" dirp ); +.fi +.PP +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.PP +.BR telldir (): +.nf + _XOPEN_SOURCE + || /* glibc >= 2.19: */ _DEFAULT_SOURCE + || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE +.fi +.SH DESCRIPTION +The +.BR telldir () +function returns the current location associated with +the directory stream \fIdirp\fP. +.SH RETURN VALUE +On success, the +.BR telldir () +function returns the current location +in the directory stream. +On error, \-1 is returned, and +.I errno +is set to indicate the error. +.SH ERRORS +.TP +.B EBADF +Invalid directory stream descriptor \fIdirp\fP. +.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 telldir () +T} Thread safety MT-Safe +.TE +.sp 1 +.SH STANDARDS +POSIX.1-2008. +.SH HISTORY +POSIX.1-2001, 4.3BSD. +.PP +Up to glibc 2.1.1, the return type of +.BR telldir () +was +.IR off_t . +POSIX.1-2001 specifies +.IR long , +and this is the type used since glibc 2.1.2. +.PP +In early filesystems, the value returned by +.BR 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 +.BR telldir () +(and used internally by +.BR readdir (3)) +is a "cookie" that is used by the implementation +to derive a position within a directory. +.\" https://lwn.net/Articles/544298/ +Application programs should treat this strictly as an opaque value, making +.I no +assumptions about its contents. +.SH SEE ALSO +.BR closedir (3), +.BR opendir (3), +.BR readdir (3), +.BR rewinddir (3), +.BR scandir (3), +.BR seekdir (3) |