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Diffstat (limited to 'openbsd-compat/realpath.c')
-rw-r--r-- | openbsd-compat/realpath.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/openbsd-compat/realpath.c b/openbsd-compat/realpath.c deleted file mode 100644 index a2f090e55..000000000 --- a/openbsd-compat/realpath.c +++ /dev/null | |||
@@ -1,229 +0,0 @@ | |||
1 | /* $OpenBSD: realpath.c,v 1.20 2015/10/13 20:55:37 millert Exp $ */ | ||
2 | /* | ||
3 | * Copyright (c) 2003 Constantin S. Svintsoff <kostik@iclub.nsu.ru> | ||
4 | * | ||
5 | * Redistribution and use in source and binary forms, with or without | ||
6 | * modification, are permitted provided that the following conditions | ||
7 | * are met: | ||
8 | * 1. Redistributions of source code must retain the above copyright | ||
9 | * notice, this list of conditions and the following disclaimer. | ||
10 | * 2. Redistributions in binary form must reproduce the above copyright | ||
11 | * notice, this list of conditions and the following disclaimer in the | ||
12 | * documentation and/or other materials provided with the distribution. | ||
13 | * 3. The names of the authors may not be used to endorse or promote | ||
14 | * products derived from this software without specific prior written | ||
15 | * permission. | ||
16 | * | ||
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND | ||
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | ||
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | ||
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | ||
27 | * SUCH DAMAGE. | ||
28 | */ | ||
29 | |||
30 | /* OPENBSD ORIGINAL: lib/libc/stdlib/realpath.c */ | ||
31 | |||
32 | #include "includes.h" | ||
33 | |||
34 | #if !defined(HAVE_REALPATH) || defined(BROKEN_REALPATH) | ||
35 | |||
36 | #include <sys/types.h> | ||
37 | #include <sys/param.h> | ||
38 | #include <sys/stat.h> | ||
39 | |||
40 | #include <errno.h> | ||
41 | #include <stdlib.h> | ||
42 | #include <stddef.h> | ||
43 | #include <string.h> | ||
44 | #include <unistd.h> | ||
45 | #include <limits.h> | ||
46 | |||
47 | #ifndef SYMLOOP_MAX | ||
48 | # define SYMLOOP_MAX 32 | ||
49 | #endif | ||
50 | |||
51 | /* A slightly modified copy of this file exists in libexec/ld.so */ | ||
52 | |||
53 | /* | ||
54 | * char *realpath(const char *path, char resolved[PATH_MAX]); | ||
55 | * | ||
56 | * Find the real name of path, by removing all ".", ".." and symlink | ||
57 | * components. Returns (resolved) on success, or (NULL) on failure, | ||
58 | * in which case the path which caused trouble is left in (resolved). | ||
59 | */ | ||
60 | char * | ||
61 | realpath(const char *path, char *resolved) | ||
62 | { | ||
63 | struct stat sb; | ||
64 | char *p, *q, *s; | ||
65 | size_t left_len, resolved_len; | ||
66 | unsigned symlinks; | ||
67 | int serrno, slen, mem_allocated; | ||
68 | char left[PATH_MAX], next_token[PATH_MAX], symlink[PATH_MAX]; | ||
69 | |||
70 | if (path[0] == '\0') { | ||
71 | errno = ENOENT; | ||
72 | return (NULL); | ||
73 | } | ||
74 | |||
75 | serrno = errno; | ||
76 | |||
77 | if (resolved == NULL) { | ||
78 | resolved = malloc(PATH_MAX); | ||
79 | if (resolved == NULL) | ||
80 | return (NULL); | ||
81 | mem_allocated = 1; | ||
82 | } else | ||
83 | mem_allocated = 0; | ||
84 | |||
85 | symlinks = 0; | ||
86 | if (path[0] == '/') { | ||
87 | resolved[0] = '/'; | ||
88 | resolved[1] = '\0'; | ||
89 | if (path[1] == '\0') | ||
90 | return (resolved); | ||
91 | resolved_len = 1; | ||
92 | left_len = strlcpy(left, path + 1, sizeof(left)); | ||
93 | } else { | ||
94 | if (getcwd(resolved, PATH_MAX) == NULL) { | ||
95 | if (mem_allocated) | ||
96 | free(resolved); | ||
97 | else | ||
98 | strlcpy(resolved, ".", PATH_MAX); | ||
99 | return (NULL); | ||
100 | } | ||
101 | resolved_len = strlen(resolved); | ||
102 | left_len = strlcpy(left, path, sizeof(left)); | ||
103 | } | ||
104 | if (left_len >= sizeof(left) || resolved_len >= PATH_MAX) { | ||
105 | errno = ENAMETOOLONG; | ||
106 | goto err; | ||
107 | } | ||
108 | |||
109 | /* | ||
110 | * Iterate over path components in `left'. | ||
111 | */ | ||
112 | while (left_len != 0) { | ||
113 | /* | ||
114 | * Extract the next path component and adjust `left' | ||
115 | * and its length. | ||
116 | */ | ||
117 | p = strchr(left, '/'); | ||
118 | s = p ? p : left + left_len; | ||
119 | if (s - left >= (ptrdiff_t)sizeof(next_token)) { | ||
120 | errno = ENAMETOOLONG; | ||
121 | goto err; | ||
122 | } | ||
123 | memcpy(next_token, left, s - left); | ||
124 | next_token[s - left] = '\0'; | ||
125 | left_len -= s - left; | ||
126 | if (p != NULL) | ||
127 | memmove(left, s + 1, left_len + 1); | ||
128 | if (resolved[resolved_len - 1] != '/') { | ||
129 | if (resolved_len + 1 >= PATH_MAX) { | ||
130 | errno = ENAMETOOLONG; | ||
131 | goto err; | ||
132 | } | ||
133 | resolved[resolved_len++] = '/'; | ||
134 | resolved[resolved_len] = '\0'; | ||
135 | } | ||
136 | if (next_token[0] == '\0') | ||
137 | continue; | ||
138 | else if (strcmp(next_token, ".") == 0) | ||
139 | continue; | ||
140 | else if (strcmp(next_token, "..") == 0) { | ||
141 | /* | ||
142 | * Strip the last path component except when we have | ||
143 | * single "/" | ||
144 | */ | ||
145 | if (resolved_len > 1) { | ||
146 | resolved[resolved_len - 1] = '\0'; | ||
147 | q = strrchr(resolved, '/') + 1; | ||
148 | *q = '\0'; | ||
149 | resolved_len = q - resolved; | ||
150 | } | ||
151 | continue; | ||
152 | } | ||
153 | |||
154 | /* | ||
155 | * Append the next path component and lstat() it. If | ||
156 | * lstat() fails we still can return successfully if | ||
157 | * there are no more path components left. | ||
158 | */ | ||
159 | resolved_len = strlcat(resolved, next_token, PATH_MAX); | ||
160 | if (resolved_len >= PATH_MAX) { | ||
161 | errno = ENAMETOOLONG; | ||
162 | goto err; | ||
163 | } | ||
164 | if (lstat(resolved, &sb) != 0) { | ||
165 | if (errno == ENOENT && p == NULL) { | ||
166 | errno = serrno; | ||
167 | return (resolved); | ||
168 | } | ||
169 | goto err; | ||
170 | } | ||
171 | if (S_ISLNK(sb.st_mode)) { | ||
172 | if (symlinks++ > SYMLOOP_MAX) { | ||
173 | errno = ELOOP; | ||
174 | goto err; | ||
175 | } | ||
176 | slen = readlink(resolved, symlink, sizeof(symlink) - 1); | ||
177 | if (slen < 0) | ||
178 | goto err; | ||
179 | symlink[slen] = '\0'; | ||
180 | if (symlink[0] == '/') { | ||
181 | resolved[1] = 0; | ||
182 | resolved_len = 1; | ||
183 | } else if (resolved_len > 1) { | ||
184 | /* Strip the last path component. */ | ||
185 | resolved[resolved_len - 1] = '\0'; | ||
186 | q = strrchr(resolved, '/') + 1; | ||
187 | *q = '\0'; | ||
188 | resolved_len = q - resolved; | ||
189 | } | ||
190 | |||
191 | /* | ||
192 | * If there are any path components left, then | ||
193 | * append them to symlink. The result is placed | ||
194 | * in `left'. | ||
195 | */ | ||
196 | if (p != NULL) { | ||
197 | if (symlink[slen - 1] != '/') { | ||
198 | if (slen + 1 >= | ||
199 | (ptrdiff_t)sizeof(symlink)) { | ||
200 | errno = ENAMETOOLONG; | ||
201 | goto err; | ||
202 | } | ||
203 | symlink[slen] = '/'; | ||
204 | symlink[slen + 1] = 0; | ||
205 | } | ||
206 | left_len = strlcat(symlink, left, sizeof(symlink)); | ||
207 | if (left_len >= sizeof(symlink)) { | ||
208 | errno = ENAMETOOLONG; | ||
209 | goto err; | ||
210 | } | ||
211 | } | ||
212 | left_len = strlcpy(left, symlink, sizeof(left)); | ||
213 | } | ||
214 | } | ||
215 | |||
216 | /* | ||
217 | * Remove trailing slash except when the resolved pathname | ||
218 | * is a single "/". | ||
219 | */ | ||
220 | if (resolved_len > 1 && resolved[resolved_len - 1] == '/') | ||
221 | resolved[resolved_len - 1] = '\0'; | ||
222 | return (resolved); | ||
223 | |||
224 | err: | ||
225 | if (mem_allocated) | ||
226 | free(resolved); | ||
227 | return (NULL); | ||
228 | } | ||
229 | #endif /* !defined(HAVE_REALPATH) || defined(BROKEN_REALPATH) */ | ||