parent.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1985 AT&T
* All Rights Reserved
*/
#ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.2 */
#include <stdio.h>
#include "wish.h"
#include "sizes.h"
char *
parent(path)
register char *path;
{
register char *dst;
register char *place;
register bool slash;
static char dirname[PATHSIZ];
/* first, put a "well-behaved" path into dirname */
place = NULL;
slash = FALSE;
for (dst = dirname; *path; path++)
if (*path == '/')
slash = TRUE;
else {
if (slash) {
place = dst;
*dst++ = '/';
slash = FALSE;
}
*dst++ = *path;
}
if (dst == dirname) {
place = dst;
*dst++ = '/';
}
if (place == NULL) {
dirname[0] = '.';
dirname[1] = '\0';
}
else if (place == dirname)
dirname[1] = '\0';
else
*place = '\0';
return dirname;
}