NetBSD/lib/libc/gen/dirname.3

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.\" $NetBSD: dirname.3,v 1.6 2001/09/16 02:57:03 wiz Exp $
.\"
.\" Copyright (c) 1997 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Klaus Klein.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" This product includes software developed by the NetBSD
.\" Foundation, Inc. and its contributors.
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.Dd November 2, 1997
.Dt DIRNAME 3
.Os
.Sh NAME
.Nm dirname
.Nd report the parent directory name of a file pathname
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.Fd #include <libgen.h>
.Ft char *
.Fn dirname "char *path"
.Sh DESCRIPTION
The
.Fn dirname
function takes a pointer to a character string that contains a pathname,
.Ar path ,
and returns a pointer to a string that is a pathname of the parent directory of
.Ar path .
Trailing '/' characters in
.Ar path
are not counted as part of the path.
.Pp
If
.Ar path
does not contain a '/', then
.Fn dirname
returns a pointer to the string ".".
.Pp
If
.Ar path
is a null pointer or points to an empty string,
.Fn dirname
returns a pointer to the string ".".
.Sh RETURN VALUES
The
.Fn dirname
function returns a pointer to a string that is the parent directory of
.Ar path .
.Sh SEE ALSO
.Xr basename 3
.Sh STANDARDS
.Bl -bullet -compact
.It
.St -xpg4.2
.El
.Sh BUGS
The
.Fn dirname
function may modify the string pointed to by
.Ar path .