96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/* $NetBSD: dirname.c,v 1.11 2009/11/24 13:34:20 tnozaki Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1997, 2002 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Klaus Klein and Jason R. Thorpe.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
#ifndef HAVE_DIRNAME
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#ifdef HAVE_LIMITS_H
|
|
#include <limits.h>
|
|
#endif
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
#ifndef PATH_MAX
|
|
# define PATH_MAX 1024
|
|
#endif
|
|
|
|
char *
|
|
dirname(char *path)
|
|
{
|
|
static char result[PATH_MAX];
|
|
const char *lastp;
|
|
size_t len;
|
|
|
|
/*
|
|
* If `path' is a null pointer or points to an empty string,
|
|
* return a pointer to the string ".".
|
|
*/
|
|
if ((path == NULL) || (*path == '\0'))
|
|
goto singledot;
|
|
|
|
|
|
/* Strip trailing slashes, if any. */
|
|
lastp = path + strlen(path) - 1;
|
|
while (lastp != path && *lastp == '/')
|
|
lastp--;
|
|
|
|
/* Terminate path at the last occurence of '/'. */
|
|
do {
|
|
if (*lastp == '/') {
|
|
/* Strip trailing slashes, if any. */
|
|
while (lastp != path && *lastp == '/')
|
|
lastp--;
|
|
|
|
/* ...and copy the result into the result buffer. */
|
|
len = (lastp - path) + 1 /* last char */;
|
|
if (len > (PATH_MAX - 1))
|
|
len = PATH_MAX - 1;
|
|
|
|
memcpy(result, path, len);
|
|
result[len] = '\0';
|
|
|
|
return (result);
|
|
}
|
|
} while (--lastp >= path);
|
|
|
|
/* No /'s found, return a pointer to the string ".". */
|
|
singledot:
|
|
result[0] = '.';
|
|
result[1] = '\0';
|
|
|
|
return (result);
|
|
}
|
|
#endif
|