Libc-320.tar.gz

[apple/libc.git] / gen / basename.3

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-.\"
-.\" Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. The name of the author may not be used to endorse or promote products
-.\"    derived from this software without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
-.\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
-.\" AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
-.\" THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-.\" EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-.\" PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
-.\" OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-.\" OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-.\" ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-.\"
-.\" $OpenBSD: basename.3,v 1.12 2000/04/18 03:01:25 aaron Exp $
-.\" $FreeBSD: src/lib/libc/gen/basename.3,v 1.4 2001/10/01 16:08:50 ru Exp $
-.\"
-.Dd August 17, 1997
-.Dt BASENAME 3
-.Os
-.Sh NAME
-.Nm basename
-.Nd extract the base portion of a pathname
-.Sh SYNOPSIS
-.In libgen.h
-.Ft char *
-.Fn basename "const char *path"
-.Sh DESCRIPTION
-The
-.Fn basename
-function
-returns the last component from the pathname pointed to by
-.Ar path ,
-deleting any trailing
-.Sq \&/
-characters.
-If
-.Ar path
-consists entirely of
-.Sq \&/
-characters, a pointer to the string
-.Qq \&/
-is returned.
-If
-.Ar path
-is a null pointer or the empty string, a pointer to the string
-.Qq \&.
-is returned.
-.Sh RETURN VALUES
-On successful completion,
-.Fn basename
-returns a pointer to the last component of
-.Ar path .
-.Pp
-If
-.Fn basename
-fails, a null pointer is returned and the global variable
-.Va errno
-is set to indicate the error.
-.Sh ERRORS
-The following error codes may be set in
-.Va errno :
-.Bl -tag -width Er
-.It Bq Er ENAMETOOLONG
-The path component to be returned was larger than
-.Dv MAXPATHLEN .
-.El
-.Sh WARNINGS
-.Fn basename
-returns a pointer to internal static storage space that will be overwritten
-by subsequent calls.
-.Sh SEE ALSO
-.Xr basename 1 ,
-.Xr dirname 1 ,
-.Xr dirname 3
-.Sh STANDARDS
-The
-.Fn basename
-function conforms to
-.St -xpg4.2 .
-.Sh HISTORY
-The
-.Fn basename
-function first appeared in
-.Ox 2.2
-and
-.Fx 4.2 .
-.Sh AUTHORS
-Todd C. Miller <Todd.Miller@courtesan.com>