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
|
/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2002 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.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. |
+----------------------------------------------------------------------+
| Authors: Brian Schaffner <brian@tool.net> |
| Shane Caraveo <shane@caraveo.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include "dl.h"
#include "php_globals.h"
#include "ext/standard/info.h"
#include "SAPI.h"
#ifndef PHP_WIN32
#include "build-defs.h"
#endif
#ifdef HAVE_LIBDL
#include <stdlib.h>
#include <stdio.h>
#if HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#ifdef PHP_WIN32
#include "win32/param.h"
#include "win32/winutil.h"
#define GET_DL_ERROR() php_win_err()
#else
#include <sys/param.h>
#define GET_DL_ERROR() dlerror()
#endif
#endif
/* {{{ proto int dl(string extension_filename)
Load a PHP extension at runtime */
PHP_FUNCTION(dl)
{
pval **file;
#ifdef ZTS
if ((strcmp(sapi_module.name, "cgi")!=0) && (strcmp(sapi_module.name, "cli")!=0)) {
php_error(E_ERROR, "dl() is not supported in multithreaded Web servers - use extension statements in your php.ini");
}
#endif
/* obtain arguments */
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &file) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(file);
if (!PG(enable_dl)) {
php_error(E_ERROR, "Dynamically loaded extentions aren't enabled.");
} else if (PG(safe_mode)) {
php_error(E_ERROR, "Dynamically loaded extensions aren't allowed when running in SAFE MODE.");
} else {
php_dl(*file, MODULE_TEMPORARY, return_value TSRMLS_CC);
EG(full_tables_cleanup) = 1;
}
}
/* }}} */
#ifdef HAVE_LIBDL
#ifdef ZTS
#define USING_ZTS 1
#else
#define USING_ZTS 0
#endif
/* {{{ php_dl
*/
void php_dl(pval *file, int type, pval *return_value TSRMLS_DC)
{
void *handle;
char *libpath;
zend_module_entry *module_entry, *tmp;
zend_module_entry *(*get_module)(void);
int error_type;
char *extension_dir;
if (type==MODULE_PERSISTENT) {
/* Use the configuration hash directly, the INI mechanism is not yet initialized */
if (cfg_get_string("extension_dir", &extension_dir)==FAILURE) {
extension_dir = PHP_EXTENSION_DIR;
}
} else {
extension_dir = PG(extension_dir);
}
if (type==MODULE_TEMPORARY) {
error_type = E_WARNING;
} else {
error_type = E_CORE_WARNING;
}
if (extension_dir && extension_dir[0]){
int extension_dir_len = strlen(extension_dir);
libpath = emalloc(extension_dir_len+Z_STRLEN_P(file)+2);
if (IS_SLASH(extension_dir[extension_dir_len-1])) {
sprintf(libpath, "%s%s", extension_dir, Z_STRVAL_P(file)); /* SAFE */
} else {
sprintf(libpath, "%s/%s", extension_dir, Z_STRVAL_P(file)); /* SAFE */
}
} else {
libpath = estrndup(Z_STRVAL_P(file), Z_STRLEN_P(file));
}
/* load dynamic symbol */
handle = DL_LOAD(libpath);
if (!handle) {
php_error(error_type, "Unable to load dynamic library '%s' - %s", libpath, GET_DL_ERROR());
efree(libpath);
RETURN_FALSE;
}
efree(libpath);
get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "get_module");
/*
* some OS prepend _ to symbol names while their dynamic linker
* does not do that automatically. Thus we check manually for
* _get_module.
*/
if (!get_module)
get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "_get_module");
if (!get_module) {
DL_UNLOAD(handle);
php_error(error_type, "Invalid library (maybe not a PHP library) '%s' ", Z_STRVAL_P(file));
RETURN_FALSE;
}
module_entry = get_module();
if ((module_entry->zend_debug != ZEND_DEBUG) || (module_entry->zts != USING_ZTS)
|| (module_entry->zend_api != ZEND_MODULE_API_NO)) {
php_error(error_type,
"%s: Unable to initialize module\n"
"Module compiled with debug=%d, thread-safety=%d module API=%d\n"
"PHP compiled with debug=%d, thread-safety=%d module API=%d\n"
"These options need to match\n",
module_entry->name, module_entry->zend_debug, module_entry->zts, module_entry->zend_api,
ZEND_DEBUG, USING_ZTS, ZEND_MODULE_API_NO);
DL_UNLOAD(handle);
RETURN_FALSE;
}
Z_TYPE_P(module_entry) = type;
module_entry->module_number = zend_next_free_module();
if (module_entry->module_startup_func) {
if (module_entry->module_startup_func(type, module_entry->module_number TSRMLS_CC)==FAILURE) {
php_error(error_type, "%s: Unable to initialize module", module_entry->name);
DL_UNLOAD(handle);
RETURN_FALSE;
}
}
zend_register_module(module_entry);
if ((type == MODULE_TEMPORARY) && module_entry->request_startup_func) {
if (module_entry->request_startup_func(type, module_entry->module_number TSRMLS_CC)) {
php_error(error_type, "%s: Unable to initialize module", module_entry->name);
DL_UNLOAD(handle);
RETURN_FALSE;
}
}
/* update the .request_started property... */
if (zend_hash_find(&module_registry, module_entry->name, strlen(module_entry->name)+1, (void **) &tmp)==FAILURE) {
php_error(error_type, "%s: Loaded module got lost", module_entry->name);
RETURN_FALSE;
}
tmp->handle = handle;
RETURN_TRUE;
}
/* }}} */
PHP_MINFO_FUNCTION(dl)
{
php_info_print_table_row(2, "Dynamic Library Support", "enabled");
}
#else
void php_dl(pval *file, int type, pval *return_value TSRMLS_DC)
{
php_error(E_WARNING, "Cannot dynamically load %s - dynamic modules are not supported", Z_STRVAL_P(file));
RETURN_FALSE;
}
PHP_MINFO_FUNCTION(dl)
{
PUTS("Dynamic Library support not available<br />.\n");
}
#endif
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
|
