summaryrefslogtreecommitdiffstats
path: root/compat/opensolaris/misc/mkdirp.c
blob: 06cec5b5062f1a140f84d37c211215b95047c705 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
/*
 * 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) 1988 AT&T	*/
/*	  All Rights Reserved  	*/

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident	"@(#)mkdirp.c	1.15	06/01/04 SMI"

/*
 * Creates directory and it's parents if the parents do not
 * exist yet.
 *
 * Returns -1 if fails for reasons other than non-existing
 * parents.
 * Does NOT simplify pathnames with . or .. in them.
 */

#include <sys/types.h>
#include <libgen.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>

static char *simplify(const char *str);

int
mkdirp(const char *d, mode_t mode)
{
	char  *endptr, *ptr, *slash, *str;

	str = simplify(d);

	/* If space couldn't be allocated for the simplified names, return. */

	if (str == NULL)
		return (-1);

		/* Try to make the directory */

	if (mkdir(str, mode) == 0) {
		free(str);
		return (0);
	}
	if (errno != ENOENT) {
		free(str);
		return (-1);
	}
	endptr = strrchr(str, '\0');
	slash = strrchr(str, '/');

		/* Search upward for the non-existing parent */

	while (slash != NULL) {

		ptr = slash;
		*ptr = '\0';

			/* If reached an existing parent, break */

		if (access(str, F_OK) == 0)
			break;

			/* If non-existing parent */

		else {
			slash = strrchr(str, '/');

				/* If under / or current directory, make it. */

			if (slash == NULL || slash == str) {
				if (mkdir(str, mode) != 0 && errno != EEXIST) {
					free(str);
					return (-1);
				}
				break;
			}
		}
	}

	/* Create directories starting from upmost non-existing parent */

	while ((ptr = strchr(str, '\0')) != endptr) {
		*ptr = '/';
		if (mkdir(str, mode) != 0 && errno != EEXIST) {
			/*
			 *  If the mkdir fails because str already
			 *  exists (EEXIST), then str has the form
			 *  "existing-dir/..", and this is really
			 *  ok. (Remember, this loop is creating the
			 *  portion of the path that didn't exist)
			 */
			free(str);
			return (-1);
		}
	}
	free(str);
	return (0);
}

/*
 *	simplify - given a pathname, simplify that path by removing
 *		   duplicate contiguous slashes.
 *
 *		   A simplified copy of the argument is returned to the
 *		   caller, or NULL is returned on error.
 *
 *		   The caller should handle error reporting based upon the
 *		   returned vlaue, and should free the returned value,
 *		   when appropriate.
 */

static char *
simplify(const char *str)
{
	int i;
	size_t mbPathlen;	/* length of multi-byte path */
	size_t wcPathlen;	/* length of wide-character path */
	wchar_t *wptr;		/* scratch pointer */
	wchar_t *wcPath;	/* wide-character version of the path */
	char *mbPath;		/* The copy fo the path to be returned */

	/*
	 *  bail out if there is nothing there.
	 */

	if (!str)
	    return (NULL);

	/*
	 *  Get a copy of the argument.
	 */

	if ((mbPath = strdup(str)) == NULL) {
		return (NULL);
	}

	/*
	 *  convert the multi-byte version of the path to a
	 *  wide-character rendering, for doing our figuring.
	 */

	mbPathlen = strlen(mbPath);

	if ((wcPath = calloc(sizeof (wchar_t), mbPathlen+1)) == NULL) {
		free(mbPath);
		return (NULL);
	}

	if ((wcPathlen = mbstowcs(wcPath, mbPath, mbPathlen)) == (size_t)-1) {
		free(mbPath);
		free(wcPath);
		return (NULL);
	}

	/*
	 *  remove duplicate slashes first ("//../" -> "/")
	 */

	for (wptr = wcPath, i = 0; i < wcPathlen; i++) {
		*wptr++ = wcPath[i];

		if (wcPath[i] == '/') {
			i++;

			while (wcPath[i] == '/') {
				i++;
			}

			i--;
		}
	}

	*wptr = '\0';

	/*
	 *  now convert back to the multi-byte format.
	 */

	if (wcstombs(mbPath, wcPath, mbPathlen) == (size_t)-1) {
		free(mbPath);
		free(wcPath);
		return (NULL);
	}

	free(wcPath);
	return (mbPath);
}
OpenPOWER on IntegriCloud