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: Wez Furlong <wez@thebrainroom.com> |
16 +----------------------------------------------------------------------+
17 */
18
19 /* $Id: 73c7c7668de72405a739f837dc62fd6ce8e5eba6 $ */
20
21 #ifdef HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24
25 #include "php.h"
26 #include "php_globals.h"
27 #include "ext/standard/info.h"
28 #include "php_sysvmsg.h"
29 #include "ext/standard/php_var.h"
30 #include "zend_smart_str.h"
31
32 /* In order to detect MSG_EXCEPT use at run time; we have no way
33 * of knowing what the bit definitions are, so we can't just define
34 * out own MSG_EXCEPT value. */
35 #define PHP_MSG_IPC_NOWAIT 1
36 #define PHP_MSG_NOERROR 2
37 #define PHP_MSG_EXCEPT 4
38
39 /* True global resources - no need for thread safety here */
40 static int le_sysvmsg;
41
42 /* {{{ arginfo */
43 ZEND_BEGIN_ARG_INFO_EX(arginfo_msg_get_queue, 0, 0, 1)
44 ZEND_ARG_INFO(0, key)
45 ZEND_ARG_INFO(0, perms)
46 ZEND_END_ARG_INFO()
47
48 ZEND_BEGIN_ARG_INFO_EX(arginfo_msg_send, 0, 0, 3)
49 ZEND_ARG_INFO(0, queue)
50 ZEND_ARG_INFO(0, msgtype)
51 ZEND_ARG_INFO(0, message)
52 ZEND_ARG_INFO(0, serialize)
53 ZEND_ARG_INFO(0, blocking)
54 ZEND_ARG_INFO(1, errorcode)
55 ZEND_END_ARG_INFO()
56
57 ZEND_BEGIN_ARG_INFO_EX(arginfo_msg_receive, 0, 0, 5)
58 ZEND_ARG_INFO(0, queue)
59 ZEND_ARG_INFO(0, desiredmsgtype)
60 ZEND_ARG_INFO(1, msgtype)
61 ZEND_ARG_INFO(0, maxsize)
62 ZEND_ARG_INFO(1, message)
63 ZEND_ARG_INFO(0, unserialize)
64 ZEND_ARG_INFO(0, flags)
65 ZEND_ARG_INFO(1, errorcode)
66 ZEND_END_ARG_INFO()
67
68 ZEND_BEGIN_ARG_INFO_EX(arginfo_msg_remove_queue, 0, 0, 1)
69 ZEND_ARG_INFO(0, queue)
70 ZEND_END_ARG_INFO()
71
72 ZEND_BEGIN_ARG_INFO_EX(arginfo_msg_stat_queue, 0, 0, 1)
73 ZEND_ARG_INFO(0, queue)
74 ZEND_END_ARG_INFO()
75
76 ZEND_BEGIN_ARG_INFO_EX(arginfo_msg_set_queue, 0, 0, 2)
77 ZEND_ARG_INFO(0, queue)
78 ZEND_ARG_INFO(0, data)
79 ZEND_END_ARG_INFO()
80
81 ZEND_BEGIN_ARG_INFO_EX(arginfo_msg_queue_exists, 0, 0, 1)
82 ZEND_ARG_INFO(0, key)
83 ZEND_END_ARG_INFO()
84 /* }}} */
85
86 /* {{{ sysvmsg_functions[]
87 *
88 * Every user visible function must have an entry in sysvmsg_functions[].
89 */
90 const zend_function_entry sysvmsg_functions[] = {
91 PHP_FE(msg_get_queue, arginfo_msg_get_queue)
92 PHP_FE(msg_send, arginfo_msg_send)
93 PHP_FE(msg_receive, arginfo_msg_receive)
94 PHP_FE(msg_remove_queue, arginfo_msg_remove_queue)
95 PHP_FE(msg_stat_queue, arginfo_msg_stat_queue)
96 PHP_FE(msg_set_queue, arginfo_msg_set_queue)
97 PHP_FE(msg_queue_exists, arginfo_msg_queue_exists)
98 PHP_FE_END
99 };
100 /* }}} */
101
102 /* {{{ sysvmsg_module_entry
103 */
104 zend_module_entry sysvmsg_module_entry = {
105 STANDARD_MODULE_HEADER,
106 "sysvmsg",
107 sysvmsg_functions,
108 PHP_MINIT(sysvmsg),
109 NULL,
110 NULL,
111 NULL,
112 PHP_MINFO(sysvmsg),
113 PHP_SYSVMSG_VERSION,
114 STANDARD_MODULE_PROPERTIES
115 };
116 /* }}} */
117
118 #ifdef COMPILE_DL_SYSVMSG
ZEND_GET_MODULE(sysvmsg)119 ZEND_GET_MODULE(sysvmsg)
120 #endif
121
122 static void sysvmsg_release(zend_resource *rsrc)
123 {
124 sysvmsg_queue_t *mq = (sysvmsg_queue_t *) rsrc->ptr;
125 efree(mq);
126 }
127
128 /* {{{ PHP_MINIT_FUNCTION
129 */
PHP_MINIT_FUNCTION(sysvmsg)130 PHP_MINIT_FUNCTION(sysvmsg)
131 {
132 le_sysvmsg = zend_register_list_destructors_ex(sysvmsg_release, NULL, "sysvmsg queue", module_number);
133 REGISTER_LONG_CONSTANT("MSG_IPC_NOWAIT", PHP_MSG_IPC_NOWAIT, CONST_PERSISTENT|CONST_CS);
134 REGISTER_LONG_CONSTANT("MSG_EAGAIN", EAGAIN, CONST_PERSISTENT|CONST_CS);
135 REGISTER_LONG_CONSTANT("MSG_ENOMSG", ENOMSG, CONST_PERSISTENT|CONST_CS);
136 REGISTER_LONG_CONSTANT("MSG_NOERROR", PHP_MSG_NOERROR, CONST_PERSISTENT|CONST_CS);
137 REGISTER_LONG_CONSTANT("MSG_EXCEPT", PHP_MSG_EXCEPT, CONST_PERSISTENT|CONST_CS);
138 return SUCCESS;
139 }
140 /* }}} */
141
142 /* {{{ PHP_MINFO_FUNCTION
143 */
PHP_MINFO_FUNCTION(sysvmsg)144 PHP_MINFO_FUNCTION(sysvmsg)
145 {
146 php_info_print_table_start();
147 php_info_print_table_row(2, "sysvmsg support", "enabled");
148 php_info_print_table_row(2, "Revision", "$Id: 73c7c7668de72405a739f837dc62fd6ce8e5eba6 $");
149 php_info_print_table_end();
150 }
151 /* }}} */
152
153 /* {{{ proto bool msg_set_queue(resource queue, array data)
154 Set information for a message queue */
PHP_FUNCTION(msg_set_queue)155 PHP_FUNCTION(msg_set_queue)
156 {
157 zval *queue, *data;
158 sysvmsg_queue_t *mq = NULL;
159 struct msqid_ds stat;
160
161 RETVAL_FALSE;
162
163 if (zend_parse_parameters(ZEND_NUM_ARGS(), "ra", &queue, &data) == FAILURE) {
164 return;
165 }
166
167 if ((mq = (sysvmsg_queue_t *)zend_fetch_resource(Z_RES_P(queue), "sysvmsg queue", le_sysvmsg)) == NULL) {
168 RETURN_FALSE;
169 }
170
171 if (msgctl(mq->id, IPC_STAT, &stat) == 0) {
172 zval *item;
173
174 /* now pull out members of data and set them in the stat buffer */
175 if ((item = zend_hash_str_find(Z_ARRVAL_P(data), "msg_perm.uid", sizeof("msg_perm.uid") - 1)) != NULL) {
176 convert_to_long_ex(item);
177 stat.msg_perm.uid = Z_LVAL_P(item);
178 }
179 if ((item = zend_hash_str_find(Z_ARRVAL_P(data), "msg_perm.gid", sizeof("msg_perm.gid") - 1)) != NULL) {
180 convert_to_long_ex(item);
181 stat.msg_perm.gid = Z_LVAL_P(item);
182 }
183 if ((item = zend_hash_str_find(Z_ARRVAL_P(data), "msg_perm.mode", sizeof("msg_perm.mode") - 1)) != NULL) {
184 convert_to_long_ex(item);
185 stat.msg_perm.mode = Z_LVAL_P(item);
186 }
187 if ((item = zend_hash_str_find(Z_ARRVAL_P(data), "msg_qbytes", sizeof("msg_qbytes") - 1)) != NULL) {
188 convert_to_long_ex(item);
189 stat.msg_qbytes = Z_LVAL_P(item);
190 }
191 if (msgctl(mq->id, IPC_SET, &stat) == 0) {
192 RETVAL_TRUE;
193 }
194 }
195 }
196 /* }}} */
197
198 /* {{{ proto array msg_stat_queue(resource queue)
199 Returns information about a message queue */
PHP_FUNCTION(msg_stat_queue)200 PHP_FUNCTION(msg_stat_queue)
201 {
202 zval *queue;
203 sysvmsg_queue_t *mq = NULL;
204 struct msqid_ds stat;
205
206 RETVAL_FALSE;
207
208 if (zend_parse_parameters(ZEND_NUM_ARGS(), "r", &queue) == FAILURE) {
209 return;
210 }
211
212 if ((mq = (sysvmsg_queue_t *)zend_fetch_resource(Z_RES_P(queue), "sysvmsg queue", le_sysvmsg)) == NULL) {
213 RETURN_FALSE;
214 }
215
216 if (msgctl(mq->id, IPC_STAT, &stat) == 0) {
217 array_init(return_value);
218
219 add_assoc_long(return_value, "msg_perm.uid", stat.msg_perm.uid);
220 add_assoc_long(return_value, "msg_perm.gid", stat.msg_perm.gid);
221 add_assoc_long(return_value, "msg_perm.mode", stat.msg_perm.mode);
222 add_assoc_long(return_value, "msg_stime", stat.msg_stime);
223 add_assoc_long(return_value, "msg_rtime", stat.msg_rtime);
224 add_assoc_long(return_value, "msg_ctime", stat.msg_ctime);
225 add_assoc_long(return_value, "msg_qnum", stat.msg_qnum);
226 add_assoc_long(return_value, "msg_qbytes", stat.msg_qbytes);
227 add_assoc_long(return_value, "msg_lspid", stat.msg_lspid);
228 add_assoc_long(return_value, "msg_lrpid", stat.msg_lrpid);
229 }
230 }
231 /* }}} */
232
233 /* {{{ proto bool msg_queue_exists(int key)
234 Check whether a message queue exists */
PHP_FUNCTION(msg_queue_exists)235 PHP_FUNCTION(msg_queue_exists)
236 {
237 zend_long key;
238
239 if (zend_parse_parameters(ZEND_NUM_ARGS(), "l", &key) == FAILURE) {
240 return;
241 }
242
243 if (msgget(key, 0) < 0) {
244 RETURN_FALSE;
245 }
246
247 RETURN_TRUE;
248 }
249 /* }}} */
250
251 /* {{{ proto resource msg_get_queue(int key [, int perms])
252 Attach to a message queue */
PHP_FUNCTION(msg_get_queue)253 PHP_FUNCTION(msg_get_queue)
254 {
255 zend_long key;
256 zend_long perms = 0666;
257 sysvmsg_queue_t *mq;
258
259 if (zend_parse_parameters(ZEND_NUM_ARGS(), "l|l", &key, &perms) == FAILURE) {
260 return;
261 }
262
263 mq = (sysvmsg_queue_t *) emalloc(sizeof(sysvmsg_queue_t));
264
265 mq->key = key;
266 mq->id = msgget(key, 0);
267 if (mq->id < 0) {
268 /* doesn't already exist; create it */
269 mq->id = msgget(key, IPC_CREAT | IPC_EXCL | perms);
270 if (mq->id < 0) {
271 php_error_docref(NULL, E_WARNING, "failed for key 0x" ZEND_XLONG_FMT ": %s", key, strerror(errno));
272 efree(mq);
273 RETURN_FALSE;
274 }
275 }
276 ZVAL_COPY_VALUE(return_value, zend_list_insert(mq, le_sysvmsg));
277 }
278 /* }}} */
279
280 /* {{{ proto bool msg_remove_queue(resource queue)
281 Destroy the queue */
PHP_FUNCTION(msg_remove_queue)282 PHP_FUNCTION(msg_remove_queue)
283 {
284 zval *queue;
285 sysvmsg_queue_t *mq = NULL;
286
287 if (zend_parse_parameters(ZEND_NUM_ARGS(), "r", &queue) == FAILURE) {
288 return;
289 }
290
291 if ((mq = (sysvmsg_queue_t *)zend_fetch_resource(Z_RES_P(queue), "sysvmsg queue", le_sysvmsg)) == NULL) {
292 RETURN_FALSE;
293 }
294
295 if (msgctl(mq->id, IPC_RMID, NULL) == 0) {
296 RETVAL_TRUE;
297 } else {
298 RETVAL_FALSE;
299 }
300 }
301 /* }}} */
302
303 /* {{{ proto mixed msg_receive(resource queue, int desiredmsgtype, int &msgtype, int maxsize, mixed message [, bool unserialize=true [, int flags=0 [, int errorcode]]])
304 Send a message of type msgtype (must be > 0) to a message queue */
PHP_FUNCTION(msg_receive)305 PHP_FUNCTION(msg_receive)
306 {
307 zval *out_message, *queue, *out_msgtype, *zerrcode = NULL;
308 zend_long desiredmsgtype, maxsize, flags = 0;
309 zend_long realflags = 0;
310 zend_bool do_unserialize = 1;
311 sysvmsg_queue_t *mq = NULL;
312 struct php_msgbuf *messagebuffer = NULL; /* buffer to transmit */
313 int result;
314
315 RETVAL_FALSE;
316
317 if (zend_parse_parameters(ZEND_NUM_ARGS(), "rlz/lz/|blz/",
318 &queue, &desiredmsgtype, &out_msgtype, &maxsize,
319 &out_message, &do_unserialize, &flags, &zerrcode) == FAILURE) {
320 return;
321 }
322
323 if (maxsize <= 0) {
324 php_error_docref(NULL, E_WARNING, "maximum size of the message has to be greater than zero");
325 return;
326 }
327
328 if (flags != 0) {
329 if (flags & PHP_MSG_EXCEPT) {
330 #ifndef MSG_EXCEPT
331 php_error_docref(NULL, E_WARNING, "MSG_EXCEPT is not supported on your system");
332 RETURN_FALSE;
333 #else
334 realflags |= MSG_EXCEPT;
335 #endif
336 }
337 if (flags & PHP_MSG_NOERROR) {
338 realflags |= MSG_NOERROR;
339 }
340 if (flags & PHP_MSG_IPC_NOWAIT) {
341 realflags |= IPC_NOWAIT;
342 }
343 }
344
345 if ((mq = (sysvmsg_queue_t *)zend_fetch_resource(Z_RES_P(queue), "sysvmsg queue", le_sysvmsg)) == NULL) {
346 RETURN_FALSE;
347 }
348
349 messagebuffer = (struct php_msgbuf *) safe_emalloc(maxsize, 1, sizeof(struct php_msgbuf));
350
351 result = msgrcv(mq->id, messagebuffer, maxsize, desiredmsgtype, realflags);
352
353 zval_dtor(out_msgtype);
354 zval_dtor(out_message);
355 ZVAL_LONG(out_msgtype, 0);
356 ZVAL_FALSE(out_message);
357
358 if (zerrcode) {
359 ZVAL_DEREF(zerrcode);
360 zval_dtor(zerrcode);
361 ZVAL_LONG(zerrcode, 0);
362 }
363
364 if (result >= 0) {
365 /* got it! */
366 ZVAL_LONG(out_msgtype, messagebuffer->mtype);
367
368 RETVAL_TRUE;
369 if (do_unserialize) {
370 php_unserialize_data_t var_hash;
371 zval tmp;
372 const unsigned char *p = (const unsigned char *) messagebuffer->mtext;
373
374 PHP_VAR_UNSERIALIZE_INIT(var_hash);
375 if (!php_var_unserialize(&tmp, &p, p + result, &var_hash)) {
376 php_error_docref(NULL, E_WARNING, "message corrupted");
377 RETVAL_FALSE;
378 } else {
379 ZVAL_COPY_VALUE(out_message, &tmp);
380 }
381 PHP_VAR_UNSERIALIZE_DESTROY(var_hash);
382 } else {
383 ZVAL_STRINGL(out_message, messagebuffer->mtext, result);
384 }
385 } else if (zerrcode) {
386 ZVAL_LONG(zerrcode, errno);
387 }
388 efree(messagebuffer);
389 }
390 /* }}} */
391
392 /* {{{ proto bool msg_send(resource queue, int msgtype, mixed message [, bool serialize=true [, bool blocking=true [, int errorcode]]])
393 Send a message of type msgtype (must be > 0) to a message queue */
PHP_FUNCTION(msg_send)394 PHP_FUNCTION(msg_send)
395 {
396 zval *message, *queue, *zerror=NULL;
397 zend_long msgtype;
398 zend_bool do_serialize = 1, blocking = 1;
399 sysvmsg_queue_t * mq = NULL;
400 struct php_msgbuf * messagebuffer = NULL; /* buffer to transmit */
401 int result;
402 int message_len = 0;
403
404 RETVAL_FALSE;
405
406 if (zend_parse_parameters(ZEND_NUM_ARGS(), "rlz|bbz/",
407 &queue, &msgtype, &message, &do_serialize, &blocking, &zerror) == FAILURE) {
408 return;
409 }
410
411 if ((mq = (sysvmsg_queue_t *)zend_fetch_resource(Z_RES_P(queue), "sysvmsg queue", le_sysvmsg)) == NULL) {
412 RETURN_FALSE;
413 }
414
415 if (do_serialize) {
416 smart_str msg_var = {0};
417 php_serialize_data_t var_hash;
418
419 PHP_VAR_SERIALIZE_INIT(var_hash);
420 php_var_serialize(&msg_var, message, &var_hash);
421 PHP_VAR_SERIALIZE_DESTROY(var_hash);
422
423 /* NB: php_msgbuf is 1 char bigger than a long, so there is no need to
424 * allocate the extra byte. */
425 messagebuffer = safe_emalloc(ZSTR_LEN(msg_var.s), 1, sizeof(struct php_msgbuf));
426 memcpy(messagebuffer->mtext, ZSTR_VAL(msg_var.s), ZSTR_LEN(msg_var.s) + 1);
427 message_len = ZSTR_LEN(msg_var.s);
428 smart_str_free(&msg_var);
429 } else {
430 char *p;
431 switch (Z_TYPE_P(message)) {
432 case IS_STRING:
433 p = Z_STRVAL_P(message);
434 message_len = Z_STRLEN_P(message);
435 break;
436
437 case IS_LONG:
438 message_len = spprintf(&p, 0, ZEND_LONG_FMT, Z_LVAL_P(message));
439 break;
440 case IS_FALSE:
441 message_len = spprintf(&p, 0, "0");
442 break;
443 case IS_TRUE:
444 message_len = spprintf(&p, 0, "1");
445 break;
446 case IS_DOUBLE:
447 message_len = spprintf(&p, 0, "%F", Z_DVAL_P(message));
448 break;
449 default:
450 php_error_docref(NULL, E_WARNING, "Message parameter must be either a string or a number.");
451 RETURN_FALSE;
452 }
453
454 messagebuffer = safe_emalloc(message_len, 1, sizeof(struct php_msgbuf));
455 memcpy(messagebuffer->mtext, p, message_len + 1);
456
457 if (Z_TYPE_P(message) != IS_STRING) {
458 efree(p);
459 }
460 }
461
462 /* set the message type */
463 messagebuffer->mtype = msgtype;
464
465 result = msgsnd(mq->id, messagebuffer, message_len, blocking ? 0 : IPC_NOWAIT);
466
467 efree(messagebuffer);
468
469 if (result == -1) {
470 php_error_docref(NULL, E_WARNING, "msgsnd failed: %s", strerror(errno));
471 if (zerror) {
472 zval_ptr_dtor(zerror);
473 ZVAL_LONG(zerror, errno);
474 }
475 } else {
476 RETVAL_TRUE;
477 }
478 }
479 /* }}} */
480
481 /*
482 * Local variables:
483 * tab-width: 4
484 * c-basic-offset: 4
485 * End:
486 * vim600: noet sw=4 ts=4 tw=78 fdm=marker
487 * vim<600: noet sw=4 ts=4 tw=78
488 */
489
