79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
/* $NetBSD: dirname.c,v 1.2 2000/01/22 22:19:09 mycroft 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
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* 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
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``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 FOUNDATION OR CONTRIBUTORS
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
__RCSID("$NetBSD: dirname.c,v 1.2 2000/01/22 22:19:09 mycroft Exp $");
|
|
#endif /* !LIBC_SCCS && !lint */
|
|
|
|
#include "namespace.h"
|
|
#include <libgen.h>
|
|
#include <string.h>
|
|
|
|
#ifdef __weak_alias
|
|
__weak_alias(dirname,_dirname)
|
|
#endif
|
|
|
|
|
|
char *
|
|
dirname(path)
|
|
char *path;
|
|
{
|
|
static char singledot[] = ".";
|
|
char *p;
|
|
|
|
/*
|
|
* If `path' is a null pointer or points to an empty string, or does
|
|
* not contain a '/', return a pointer to the string ".".
|
|
*/
|
|
if ((path == NULL) || (*path == '\0') ||
|
|
(strchr(path, '/') == NULL))
|
|
return (singledot);
|
|
|
|
/* Strip trailing slashes, if any. */
|
|
p = path + strlen(path) - 1;
|
|
while (*p == '/' && p != path)
|
|
*p-- = '\0';
|
|
|
|
/* Terminate path at the last occurence of '/'. */
|
|
if ((p = strrchr(path, '/')) != NULL)
|
|
*(p + (p == path ? 1 : 0)) = '\0';
|
|
|
|
return (path);
|
|
}
|