1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2018 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: Pierre A. Joye <pierre@php.net> |
16 +----------------------------------------------------------------------+
17 */
18
19 /* $Id$ */
20 #ifdef PHP_WIN32
21
22 #include "php.h"
23 #include "php_filestat.h"
24 #include "php_globals.h"
25
26 #include <WinBase.h>
27
28 #include <stdlib.h>
29
30 #include <string.h>
31 #if HAVE_PWD_H
32 #include "win32/pwd.h"
33 #endif
34
35 #if HAVE_GRP_H
36 #include "win32/grp.h"
37 #endif
38
39 #include <errno.h>
40 #include <ctype.h>
41
42 #include "php_link.h"
43 #include "php_string.h"
44
45 /*
46 TODO:
47 - Create php_readlink (done), php_link and php_symlink in win32/link.c
48 - Expose them (PHPAPI) so extensions developers can use them
49 - define link/readlink/symlink to their php_ equivalent and use them in ext/standart/link.c
50 - this file is then useless and we have a portable link API
51 */
52
53 #ifndef VOLUME_NAME_NT
54 #define VOLUME_NAME_NT 0x2
55 #endif
56
57 #ifndef VOLUME_NAME_DOS
58 #define VOLUME_NAME_DOS 0x0
59 #endif
60
61 /* {{{ proto string readlink(string filename)
62 Return the target of a symbolic link */
PHP_FUNCTION(readlink)63 PHP_FUNCTION(readlink)
64 {
65 char *link;
66 size_t link_len;
67 char target[MAXPATHLEN];
68
69 if (zend_parse_parameters(ZEND_NUM_ARGS(), "p", &link, &link_len) == FAILURE) {
70 return;
71 }
72
73 if (OPENBASEDIR_CHECKPATH(link)) {
74 RETURN_FALSE;
75 }
76
77 if (php_sys_readlink(link, target, MAXPATHLEN) == -1) {
78 php_error_docref(NULL, E_WARNING, "readlink failed to read the symbolic link (%s), error %d)", link, GetLastError());
79 RETURN_FALSE;
80 }
81 RETURN_STRING(target);
82 }
83 /* }}} */
84
85 /* {{{ proto int linkinfo(string filename)
86 Returns the st_dev field of the UNIX C stat structure describing the link */
PHP_FUNCTION(linkinfo)87 PHP_FUNCTION(linkinfo)
88 {
89 char *link;
90 char *dirname;
91 size_t link_len;
92 zend_stat_t sb;
93 int ret;
94
95 if (zend_parse_parameters(ZEND_NUM_ARGS(), "p", &link, &link_len) == FAILURE) {
96 return;
97 }
98
99 dirname = estrndup(link, link_len);
100 php_dirname(dirname, link_len);
101
102 if (php_check_open_basedir(dirname)) {
103 efree(dirname);
104 RETURN_FALSE;
105 }
106
107 ret = VCWD_STAT(link, &sb);
108 if (ret == -1) {
109 php_error_docref(NULL, E_WARNING, "%s", strerror(errno));
110 efree(dirname);
111 RETURN_LONG(Z_L(-1));
112 }
113
114 efree(dirname);
115 RETURN_LONG((zend_long) sb.st_dev);
116 }
117 /* }}} */
118
119 /* {{{ proto int symlink(string target, string link)
120 Create a symbolic link */
PHP_FUNCTION(symlink)121 PHP_FUNCTION(symlink)
122 {
123 char *topath, *frompath;
124 size_t topath_len, frompath_len;
125 BOOLEAN ret;
126 char source_p[MAXPATHLEN];
127 char dest_p[MAXPATHLEN];
128 char dirname[MAXPATHLEN];
129 size_t len;
130 DWORD attr;
131 wchar_t *dstw, *srcw;
132
133 if (zend_parse_parameters(ZEND_NUM_ARGS(), "pp", &topath, &topath_len, &frompath, &frompath_len) == FAILURE) {
134 return;
135 }
136
137 if (!expand_filepath(frompath, source_p)) {
138 php_error_docref(NULL, E_WARNING, "No such file or directory");
139 RETURN_FALSE;
140 }
141
142 memcpy(dirname, source_p, sizeof(source_p));
143 len = php_dirname(dirname, strlen(dirname));
144
145 if (!expand_filepath_ex(topath, dest_p, dirname, len)) {
146 php_error_docref(NULL, E_WARNING, "No such file or directory");
147 RETURN_FALSE;
148 }
149
150 if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY) ||
151 php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY) )
152 {
153 php_error_docref(NULL, E_WARNING, "Unable to symlink to a URL");
154 RETURN_FALSE;
155 }
156
157 if (OPENBASEDIR_CHECKPATH(dest_p)) {
158 RETURN_FALSE;
159 }
160
161 if (OPENBASEDIR_CHECKPATH(source_p)) {
162 RETURN_FALSE;
163 }
164
165 dstw = php_win32_ioutil_any_to_w(topath);
166 if (!dstw) {
167 php_error_docref(NULL, E_WARNING, "UTF-16 conversion failed (error %d)", GetLastError());
168 RETURN_FALSE;
169 }
170 if ((attr = GetFileAttributesW(dstw)) == INVALID_FILE_ATTRIBUTES) {
171 free(dstw);
172 php_error_docref(NULL, E_WARNING, "Could not fetch file information(error %d)", GetLastError());
173 RETURN_FALSE;
174 }
175
176 srcw = php_win32_ioutil_any_to_w(source_p);
177 if (!srcw) {
178 free(dstw);
179 php_error_docref(NULL, E_WARNING, "UTF-16 conversion failed (error %d)", GetLastError());
180 RETURN_FALSE;
181 }
182 /* For the source, an expanded path must be used (in ZTS an other thread could have changed the CWD).
183 * For the target the exact string given by the user must be used, relative or not, existing or not.
184 * The target is relative to the link itself, not to the CWD. */
185 ret = CreateSymbolicLinkW(srcw, dstw, (attr & FILE_ATTRIBUTE_DIRECTORY ? 1 : 0));
186
187 if (!ret) {
188 free(dstw);
189 free(srcw);
190 php_error_docref(NULL, E_WARNING, "Cannot create symlink, error code(%d)", GetLastError());
191 RETURN_FALSE;
192 }
193
194 free(dstw);
195 free(srcw);
196
197 RETURN_TRUE;
198 }
199 /* }}} */
200
201 /* {{{ proto int link(string target, string link)
202 Create a hard link */
PHP_FUNCTION(link)203 PHP_FUNCTION(link)
204 {
205 char *topath, *frompath;
206 size_t topath_len, frompath_len;
207 int ret;
208 char source_p[MAXPATHLEN];
209 char dest_p[MAXPATHLEN];
210 wchar_t *dstw, *srcw;
211
212 /*First argument to link function is the target and hence should go to frompath
213 Second argument to link function is the link itself and hence should go to topath */
214 if (zend_parse_parameters(ZEND_NUM_ARGS(), "pp", &frompath, &frompath_len, &topath, &topath_len) == FAILURE) {
215 return;
216 }
217
218 if (!expand_filepath(frompath, source_p) || !expand_filepath(topath, dest_p)) {
219 php_error_docref(NULL, E_WARNING, "No such file or directory");
220 RETURN_FALSE;
221 }
222
223 if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY) ||
224 php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY) )
225 {
226 php_error_docref(NULL, E_WARNING, "Unable to link to a URL");
227 RETURN_FALSE;
228 }
229
230 if (OPENBASEDIR_CHECKPATH(source_p)) {
231 RETURN_FALSE;
232 }
233
234 if (OPENBASEDIR_CHECKPATH(dest_p)) {
235 RETURN_FALSE;
236 }
237
238 #ifndef ZTS
239 # define _TO_PATH topath
240 # define _FROM_PATH frompath
241 #else
242 # define _TO_PATH dest_p
243 # define _FROM_PATH source_p
244 #endif
245 dstw = php_win32_ioutil_any_to_w(_TO_PATH);
246 if (!dstw) {
247 php_error_docref(NULL, E_WARNING, "UTF-16 conversion failed (error %d)", GetLastError());
248 RETURN_FALSE;
249 }
250 srcw = php_win32_ioutil_any_to_w(_FROM_PATH);
251 if (!srcw) {
252 free(dstw);
253 php_error_docref(NULL, E_WARNING, "UTF-16 conversion failed (error %d)", GetLastError());
254 RETURN_FALSE;
255 }
256 #undef _TO_PATH
257 #undef _FROM_PATH
258
259 ret = CreateHardLinkW(dstw, srcw, NULL);
260
261 if (ret == 0) {
262 free(dstw);
263 free(srcw);
264 php_error_docref(NULL, E_WARNING, "%s", strerror(errno));
265 RETURN_FALSE;
266 }
267
268 free(dstw);
269 free(srcw);
270
271 RETURN_TRUE;
272 }
273 /* }}} */
274
275 #endif
276
277 /*
278 * Local variables:
279 * tab-width: 4
280 * c-basic-offset: 4
281 * End:
282 * vim600: noet sw=4 ts=4 fdm=marker
283 * vim<600: noet sw=4 ts=4
284 */
285
