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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * rmdirp() removes directories in path "d". Removal starts from the
32 * right most directory in the path and goes backward as far as possible.
33 * The remaining path, which is not removed for some reason, is stored in "d1".
34 * If nothing remains, "d1" is empty.
35 *
36 * rmdirp()
37 * returns 0 only if it succeeds in removing every directory in d.
38 * returns -1 if removal stops because of errors other than the following.
39 * returns -2 if removal stops when "." or ".." is encountered in path.
40 * returns -3 if removal stops because it's the current directory.
41 */
42
43 #include <sys/types.h>
44 #include <libgen.h>
45 #include <sys/stat.h>
46 #include <string.h>
47 #include <unistd.h>
48
49 static int dotdot(char *);
50
51 int
rmdirp(char * d,char * d1)52 rmdirp(char *d, char *d1)
53 {
54 struct stat64 st, cst;
55 int currstat;
56 char *slash;
57
58 slash = strrchr(d, '/');
59 currstat = stat64(".", &cst);
60
61 /* Starts from right most element */
62
63 while (d) {
64 /* If it's under current directory */
65
66 if (slash == NULL) {
67 /* Stop if it's . or .. */
68
69 if (dotdot(d)) {
70 (void) strcpy(d1, d);
71 return (-2);
72 }
73 /* Stop if can not stat it */
74
75 } else { /* If there's a slash before it */
76
77 /* If extra / in the end */
78 if (slash != d) {
79 if (++slash == strrchr(d, '\0')) {
80 *(--slash) = '\0';
81 slash = strrchr(d, '/');
82 continue;
83 } else {
84 slash--;
85 }
86 }
87
88 /* Stop if it's . or .. */
89
90 if (dotdot(++slash)) {
91 (void) strcpy(d1, d);
92 return (-2);
93 }
94 slash--;
95
96 /* Stop if can not stat it */
97
98 if (stat64(d, &st) < 0) {
99 (void) strcpy(d1, d);
100 return (-1);
101 }
102 if (currstat == 0) {
103 /* Stop if it's current directory */
104 if ((st.st_ino == cst.st_ino) &&
105 (st.st_dev == cst.st_dev)) {
106 (void) strcpy(d1, d);
107 return (-3);
108 }
109 }
110 } /* End of else */
111
112
113 /* Remove it */
114 if (rmdir(d) != 0) {
115 (void) strcpy(d1, d);
116 return (-1);
117 }
118
119 /* Have reached left end, break */
120
121 if (slash == NULL || slash == d)
122 break;
123
124 /* Go backward to next directory */
125 *slash = '\0';
126 slash = strrchr(d, '/');
127 }
128 *d1 = '\0';
129 return (0);
130 }
131
132
133 static int
dotdot(char * dir)134 dotdot(char *dir)
135 {
136 if (strcmp(dir, ".") == 0 || strcmp(dir, "..") == 0)
137 return (-1);
138 return (0);
139 }
140