1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 *
22 * $FreeBSD$
23 */
24
25/*	Copyright (c) 1988 AT&T	*/
26/*	  All Rights Reserved  	*/
27
28/*
29 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
30 * Use is subject to license terms.
31 */
32
33#pragma ident	"@(#)mkdirp.c	1.15	06/01/04 SMI"
34
35/*
36 * Creates directory and it's parents if the parents do not
37 * exist yet.
38 *
39 * Returns -1 if fails for reasons other than non-existing
40 * parents.
41 * Does NOT simplify pathnames with . or .. in them.
42 */
43
44#include <sys/types.h>
45#include <libgen.h>
46#include <stdlib.h>
47#include <unistd.h>
48#include <errno.h>
49#include <string.h>
50#include <sys/stat.h>
51
52static char *simplify(const char *str);
53
54int
55mkdirp(const char *d, mode_t mode)
56{
57	char  *endptr, *ptr, *slash, *str;
58
59	str = simplify(d);
60
61	/* If space couldn't be allocated for the simplified names, return. */
62
63	if (str == NULL)
64		return (-1);
65
66		/* Try to make the directory */
67
68	if (mkdir(str, mode) == 0) {
69		free(str);
70		return (0);
71	}
72	if (errno != ENOENT) {
73		free(str);
74		return (-1);
75	}
76	endptr = strrchr(str, '\0');
77	slash = strrchr(str, '/');
78
79		/* Search upward for the non-existing parent */
80
81	while (slash != NULL) {
82
83		ptr = slash;
84		*ptr = '\0';
85
86			/* If reached an existing parent, break */
87
88		if (access(str, F_OK) == 0)
89			break;
90
91			/* If non-existing parent */
92
93		else {
94			slash = strrchr(str, '/');
95
96				/* If under / or current directory, make it. */
97
98			if (slash == NULL || slash == str) {
99				if (mkdir(str, mode) != 0 && errno != EEXIST) {
100					free(str);
101					return (-1);
102				}
103				break;
104			}
105		}
106	}
107
108	/* Create directories starting from upmost non-existing parent */
109
110	while ((ptr = strchr(str, '\0')) != endptr) {
111		*ptr = '/';
112		if (mkdir(str, mode) != 0 && errno != EEXIST) {
113			/*
114			 *  If the mkdir fails because str already
115			 *  exists (EEXIST), then str has the form
116			 *  "existing-dir/..", and this is really
117			 *  ok. (Remember, this loop is creating the
118			 *  portion of the path that didn't exist)
119			 */
120			free(str);
121			return (-1);
122		}
123	}
124	free(str);
125	return (0);
126}
127
128/*
129 *	simplify - given a pathname, simplify that path by removing
130 *		   duplicate contiguous slashes.
131 *
132 *		   A simplified copy of the argument is returned to the
133 *		   caller, or NULL is returned on error.
134 *
135 *		   The caller should handle error reporting based upon the
136 *		   returned vlaue, and should free the returned value,
137 *		   when appropriate.
138 */
139
140static char *
141simplify(const char *str)
142{
143	int i;
144	size_t mbPathlen;	/* length of multi-byte path */
145	size_t wcPathlen;	/* length of wide-character path */
146	wchar_t *wptr;		/* scratch pointer */
147	wchar_t *wcPath;	/* wide-character version of the path */
148	char *mbPath;		/* The copy fo the path to be returned */
149
150	/*
151	 *  bail out if there is nothing there.
152	 */
153
154	if (!str)
155	    return (NULL);
156
157	/*
158	 *  Get a copy of the argument.
159	 */
160
161	if ((mbPath = strdup(str)) == NULL) {
162		return (NULL);
163	}
164
165	/*
166	 *  convert the multi-byte version of the path to a
167	 *  wide-character rendering, for doing our figuring.
168	 */
169
170	mbPathlen = strlen(mbPath);
171
172	if ((wcPath = calloc(sizeof (wchar_t), mbPathlen+1)) == NULL) {
173		free(mbPath);
174		return (NULL);
175	}
176
177	if ((wcPathlen = mbstowcs(wcPath, mbPath, mbPathlen)) == (size_t)-1) {
178		free(mbPath);
179		free(wcPath);
180		return (NULL);
181	}
182
183	/*
184	 *  remove duplicate slashes first ("//../" -> "/")
185	 */
186
187	for (wptr = wcPath, i = 0; i < wcPathlen; i++) {
188		*wptr++ = wcPath[i];
189
190		if (wcPath[i] == '/') {
191			i++;
192
193			while (wcPath[i] == '/') {
194				i++;
195			}
196
197			i--;
198		}
199	}
200
201	*wptr = '\0';
202
203	/*
204	 *  now convert back to the multi-byte format.
205	 */
206
207	if (wcstombs(mbPath, wcPath, mbPathlen) == (size_t)-1) {
208		free(mbPath);
209		free(wcPath);
210		return (NULL);
211	}
212
213	free(wcPath);
214	return (mbPath);
215}
216