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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
|
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2009 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Pierre A. Joye <pierre@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef PHP_WIN32
#include "php.h"
#include "php_filestat.h"
#include "php_globals.h"
#include <WinBase.h>
#include <stdlib.h>
#include <string.h>
#if HAVE_PWD_H
#include "win32/pwd.h"
#endif
#if HAVE_GRP_H
#include "win32/grp.h"
#endif
#include <errno.h>
#include <ctype.h>
#include "safe_mode.h"
#include "php_link.h"
#include "php_string.h"
/*
TODO:
- Create php_readlink, php_link and php_symlink in win32/link.c
- Expose them (PHPAPI) so extensions developers can use them
- define link/readlink/symlink to their php_ equivalent and use them in ext/standart/link.c
- this file is then useless and we have a portable link API
*/
/* {{{ proto string readlink(string filename)
Return the target of a symbolic link */
PHP_FUNCTION(readlink)
{
HINSTANCE kernel32;
char *link;
int link_len;
TCHAR Path[MAXPATHLEN];
HANDLE hFile;
DWORD dwRet;
typedef BOOL (WINAPI *gfpnh_func)(HANDLE, LPTSTR, DWORD, DWORD);
gfpnh_func pGetFinalPathNameByHandle;
kernel32 = LoadLibrary("kernel32.dll");
if (kernel32) {
pGetFinalPathNameByHandle = (gfpnh_func)GetProcAddress(kernel32, "GetFinalPathNameByHandleA");
if (pGetFinalPathNameByHandle == NULL) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't call GetFinalPathNameByHandleA");
RETURN_FALSE;
}
} else {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't call get a handle on kernel32.dll");
RETURN_FALSE;
}
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &link, &link_len) == FAILURE) {
return;
}
if (PG(safe_mode) && !php_checkuid(link, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
RETURN_FALSE;
}
if (php_check_open_basedir(link TSRMLS_CC)) {
RETURN_FALSE;
}
hFile = CreateFile(link, // file to open
GENERIC_READ, // open for reading
FILE_SHARE_READ, // share for reading
NULL, // default security
OPEN_EXISTING, // existing file only
FILE_FLAG_BACKUP_SEMANTICS, // normal file
NULL); // no attr. template
if( hFile == INVALID_HANDLE_VALUE) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not open file (error %d)", GetLastError());
RETURN_FALSE;
}
dwRet = pGetFinalPathNameByHandle(hFile, Path, MAXPATHLEN, VOLUME_NAME_NT);
if(dwRet >= MAXPATHLEN) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't resolve the full path, the path exceeds the MAX_PATH_LEN (%d) limit", MAXPATHLEN);
RETURN_FALSE;
}
CloseHandle(hFile);
/* Append NULL to the end of the string */
Path[dwRet] = '\0';
RETURN_STRING(Path, 1);
}
/* }}} */
/* {{{ proto int linkinfo(string filename)
Returns the st_dev field of the UNIX C stat structure describing the link */
PHP_FUNCTION(linkinfo)
{
char *link;
int link_len;
struct stat sb;
int ret;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &link, &link_len) == FAILURE) {
return;
}
ret = VCWD_STAT(link, &sb);
if (ret == -1) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", strerror(errno));
RETURN_LONG(-1L);
}
RETURN_LONG((long) sb.st_dev);
}
/* }}} */
/* {{{ proto int symlink(string target, string link)
Create a symbolic link */
PHP_FUNCTION(symlink)
{
char *topath, *frompath;
int topath_len, frompath_len;
BOOLEAN ret;
char source_p[MAXPATHLEN];
char dest_p[MAXPATHLEN];
char dirname[MAXPATHLEN];
size_t len;
DWORD attr;
HINSTANCE kernel32;
typedef BOOLEAN (WINAPI *csla_func)( __in LPCSTR, __in LPCSTR, __in DWORD);
csla_func pCreateSymbolicLinkA;
kernel32 = LoadLibrary("kernel32.dll");
if (kernel32) {
pCreateSymbolicLinkA = (csla_func)GetProcAddress(kernel32, "CreateSymbolicLinkA");
if (pCreateSymbolicLinkA == NULL) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't call CreateSymbolicLinkA");
RETURN_FALSE;
}
} else {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't call get a handle on kernel32.dll");
RETURN_FALSE;
}
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss", &topath, &topath_len, &frompath, &frompath_len) == FAILURE) {
return;
}
if (!expand_filepath(frompath, source_p TSRMLS_CC)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "No such file or directory");
RETURN_FALSE;
}
memcpy(dirname, source_p, sizeof(source_p));
len = php_dirname(dirname, strlen(dirname));
if (!expand_filepath_ex(topath, dest_p, dirname, len TSRMLS_CC)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "No such file or directory");
RETURN_FALSE;
}
if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) ||
php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) )
{
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to symlink to a URL");
RETURN_FALSE;
}
if (PG(safe_mode) && !php_checkuid(dest_p, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
RETURN_FALSE;
}
if (PG(safe_mode) && !php_checkuid(source_p, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
RETURN_FALSE;
}
if (php_check_open_basedir(dest_p TSRMLS_CC)) {
RETURN_FALSE;
}
if (php_check_open_basedir(source_p TSRMLS_CC)) {
RETURN_FALSE;
}
if ((attr = GetFileAttributes(topath)) == INVALID_FILE_ATTRIBUTES) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not fetch file information(error %d)", GetLastError());
RETURN_FALSE;
}
/* For the source, an expanded path must be used (in ZTS an other thread could have changed the CWD).
* For the target the exact string given by the user must be used, relative or not, existing or not.
* The target is relative to the link itself, not to the CWD. */
ret = pCreateSymbolicLinkA(source_p, topath, (attr & FILE_ATTRIBUTE_DIRECTORY ? 1 : 0));
if (!ret) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot create symlink, error code(%d)", GetLastError());
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
/* {{{ proto int link(string target, string link)
Create a hard link */
PHP_FUNCTION(link)
{
char *topath, *frompath;
int topath_len, frompath_len;
int ret;
char source_p[MAXPATHLEN];
char dest_p[MAXPATHLEN];
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss", &topath, &topath_len, &frompath, &frompath_len) == FAILURE) {
return;
}
if (!expand_filepath(frompath, source_p TSRMLS_CC) || !expand_filepath(topath, dest_p TSRMLS_CC)) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "No such file or directory");
RETURN_FALSE;
}
if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) ||
php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) )
{
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to link to a URL");
RETURN_FALSE;
}
if (PG(safe_mode) && !php_checkuid(dest_p, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
RETURN_FALSE;
}
if (PG(safe_mode) && !php_checkuid(source_p, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
RETURN_FALSE;
}
if (php_check_open_basedir(dest_p TSRMLS_CC)) {
RETURN_FALSE;
}
if (php_check_open_basedir(source_p TSRMLS_CC)) {
RETURN_FALSE;
}
#ifndef ZTS
ret = CreateHardLinkA(topath, frompath, NULL);
#else
ret = CreateHardLinkA(dest_p, source_p, NULL);
#endif
if (ret == -1) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", strerror(errno));
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: noet sw=4 ts=4 fdm=marker
* vim<600: noet sw=4 ts=4
*/
|
