NetBSD/lib/libc/gen/dirname.3

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.\" $NetBSD: dirname.3,v 1.2 1998/02/05 18:46:11 perry 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.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" 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 Nov 2, 1997
.Dt DIRNAME 3
.Os NetBSD
.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 ".".
.Pp
.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 .