forked from php/php-src
-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathuserspace.c
1476 lines (1198 loc) · 41.6 KB
/
userspace.c
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
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
+----------------------------------------------------------------------+
| Copyright (c) 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: |
| https://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 |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Wez Furlong <[email protected]> |
| Sara Golemon <[email protected]> |
+----------------------------------------------------------------------+
*/
#include "php.h"
#include "php_globals.h"
#include "ext/standard/file.h"
#include "ext/standard/flock_compat.h"
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#include <stddef.h>
#if HAVE_UTIME
# ifdef PHP_WIN32
# include <sys/utime.h>
# else
# include <utime.h>
# endif
#endif
static int le_protocols;
struct php_user_stream_wrapper {
php_stream_wrapper wrapper;
char * protoname;
zend_class_entry *ce;
zend_resource *resource;
};
static php_stream *user_wrapper_opener(php_stream_wrapper *wrapper, const char *filename, const char *mode, int options, zend_string **opened_path, php_stream_context *context STREAMS_DC);
static int user_wrapper_close(php_stream_wrapper *wrapper, php_stream *stream);
static int user_wrapper_stat_url(php_stream_wrapper *wrapper, const char *url, int flags, php_stream_statbuf *ssb, php_stream_context *context);
static int user_wrapper_unlink(php_stream_wrapper *wrapper, const char *url, int options, php_stream_context *context);
static int user_wrapper_rename(php_stream_wrapper *wrapper, const char *url_from, const char *url_to, int options, php_stream_context *context);
static int user_wrapper_mkdir(php_stream_wrapper *wrapper, const char *url, int mode, int options, php_stream_context *context);
static int user_wrapper_rmdir(php_stream_wrapper *wrapper, const char *url, int options, php_stream_context *context);
static int user_wrapper_metadata(php_stream_wrapper *wrapper, const char *url, int option, void *value, php_stream_context *context);
static php_stream *user_wrapper_opendir(php_stream_wrapper *wrapper, const char *filename, const char *mode,
int options, zend_string **opened_path, php_stream_context *context STREAMS_DC);
static const php_stream_wrapper_ops user_stream_wops = {
user_wrapper_opener,
user_wrapper_close,
NULL, /* stat - the streams themselves know how */
user_wrapper_stat_url,
user_wrapper_opendir,
"user-space",
user_wrapper_unlink,
user_wrapper_rename,
user_wrapper_mkdir,
user_wrapper_rmdir,
user_wrapper_metadata
};
static void stream_wrapper_dtor(zend_resource *rsrc)
{
struct php_user_stream_wrapper * uwrap = (struct php_user_stream_wrapper*)rsrc->ptr;
efree(uwrap->protoname);
efree(uwrap);
}
PHP_MINIT_FUNCTION(user_streams)
{
le_protocols = zend_register_list_destructors_ex(stream_wrapper_dtor, NULL, "stream factory", 0);
if (le_protocols == FAILURE)
return FAILURE;
REGISTER_LONG_CONSTANT("STREAM_USE_PATH", USE_PATH, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_IGNORE_URL", IGNORE_URL, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_REPORT_ERRORS", REPORT_ERRORS, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_MUST_SEEK", STREAM_MUST_SEEK, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_URL_STAT_LINK", PHP_STREAM_URL_STAT_LINK, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_URL_STAT_QUIET", PHP_STREAM_URL_STAT_QUIET, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_MKDIR_RECURSIVE", PHP_STREAM_MKDIR_RECURSIVE, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_IS_URL", PHP_STREAM_IS_URL, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_OPTION_BLOCKING", PHP_STREAM_OPTION_BLOCKING, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_OPTION_READ_TIMEOUT", PHP_STREAM_OPTION_READ_TIMEOUT, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_OPTION_READ_BUFFER", PHP_STREAM_OPTION_READ_BUFFER, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_OPTION_WRITE_BUFFER", PHP_STREAM_OPTION_WRITE_BUFFER, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_BUFFER_NONE", PHP_STREAM_BUFFER_NONE, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_BUFFER_LINE", PHP_STREAM_BUFFER_LINE, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_BUFFER_FULL", PHP_STREAM_BUFFER_FULL, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_CAST_AS_STREAM", PHP_STREAM_AS_STDIO, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_CAST_FOR_SELECT", PHP_STREAM_AS_FD_FOR_SELECT, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_META_TOUCH", PHP_STREAM_META_TOUCH, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_META_OWNER", PHP_STREAM_META_OWNER, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_META_OWNER_NAME", PHP_STREAM_META_OWNER_NAME, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_META_GROUP", PHP_STREAM_META_GROUP, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_META_GROUP_NAME", PHP_STREAM_META_GROUP_NAME, CONST_CS|CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("STREAM_META_ACCESS", PHP_STREAM_META_ACCESS, CONST_CS|CONST_PERSISTENT);
return SUCCESS;
}
struct _php_userstream_data {
struct php_user_stream_wrapper * wrapper;
zval object;
};
typedef struct _php_userstream_data php_userstream_data_t;
/* names of methods */
#define USERSTREAM_OPEN "stream_open"
#define USERSTREAM_CLOSE "stream_close"
#define USERSTREAM_READ "stream_read"
#define USERSTREAM_WRITE "stream_write"
#define USERSTREAM_FLUSH "stream_flush"
#define USERSTREAM_SEEK "stream_seek"
#define USERSTREAM_TELL "stream_tell"
#define USERSTREAM_EOF "stream_eof"
#define USERSTREAM_STAT "stream_stat"
#define USERSTREAM_STATURL "url_stat"
#define USERSTREAM_UNLINK "unlink"
#define USERSTREAM_RENAME "rename"
#define USERSTREAM_MKDIR "mkdir"
#define USERSTREAM_RMDIR "rmdir"
#define USERSTREAM_DIR_OPEN "dir_opendir"
#define USERSTREAM_DIR_READ "dir_readdir"
#define USERSTREAM_DIR_REWIND "dir_rewinddir"
#define USERSTREAM_DIR_CLOSE "dir_closedir"
#define USERSTREAM_LOCK "stream_lock"
#define USERSTREAM_CAST "stream_cast"
#define USERSTREAM_SET_OPTION "stream_set_option"
#define USERSTREAM_TRUNCATE "stream_truncate"
#define USERSTREAM_METADATA "stream_metadata"
/* {{{ class should have methods like these:
function stream_open($path, $mode, $options, &$opened_path)
{
return true/false;
}
function stream_read($count)
{
return false on error;
else return string;
}
function stream_write($data)
{
return false on error;
else return count written;
}
function stream_close()
{
}
function stream_flush()
{
return true/false;
}
function stream_seek($offset, $whence)
{
return true/false;
}
function stream_tell()
{
return (int)$position;
}
function stream_eof()
{
return true/false;
}
function stream_stat()
{
return array( just like that returned by fstat() );
}
function stream_cast($castas)
{
if ($castas == STREAM_CAST_FOR_SELECT) {
return $this->underlying_stream;
}
return false;
}
function stream_set_option($option, $arg1, $arg2)
{
switch($option) {
case STREAM_OPTION_BLOCKING:
$blocking = $arg1;
...
case STREAM_OPTION_READ_TIMEOUT:
$sec = $arg1;
$usec = $arg2;
...
case STREAM_OPTION_WRITE_BUFFER:
$mode = $arg1;
$size = $arg2;
...
default:
return false;
}
}
function url_stat(string $url, int $flags)
{
return array( just like that returned by stat() );
}
function unlink(string $url)
{
return true / false;
}
function rename(string $from, string $to)
{
return true / false;
}
function mkdir($dir, $mode, $options)
{
return true / false;
}
function rmdir($dir, $options)
{
return true / false;
}
function dir_opendir(string $url, int $options)
{
return true / false;
}
function dir_readdir()
{
return string next filename in dir ;
}
function dir_closedir()
{
release dir related resources;
}
function dir_rewinddir()
{
reset to start of dir list;
}
function stream_lock($operation)
{
return true / false;
}
function stream_truncate($new_size)
{
return true / false;
}
}}} **/
static zend_result call_method_if_exists(
zval *object, zval *method_name, zval *retval, uint32_t param_count, zval *params)
{
return zend_call_method_if_exists(
Z_OBJ_P(object), Z_STR_P(method_name), retval, param_count, params);
}
static void user_stream_create_object(struct php_user_stream_wrapper *uwrap, php_stream_context *context, zval *object)
{
if (uwrap->ce->ce_flags & (ZEND_ACC_INTERFACE|ZEND_ACC_TRAIT|ZEND_ACC_IMPLICIT_ABSTRACT_CLASS|ZEND_ACC_EXPLICIT_ABSTRACT_CLASS)) {
ZVAL_UNDEF(object);
return;
}
/* create an instance of our class */
if (object_init_ex(object, uwrap->ce) == FAILURE) {
ZVAL_UNDEF(object);
return;
}
if (context) {
GC_ADDREF(context->res);
add_property_resource(object, "context", context->res);
} else {
add_property_null(object, "context");
}
if (uwrap->ce->constructor) {
zend_call_known_instance_method_with_0_params(
uwrap->ce->constructor, Z_OBJ_P(object), NULL);
}
}
static php_stream *user_wrapper_opener(php_stream_wrapper *wrapper, const char *filename, const char *mode,
int options, zend_string **opened_path, php_stream_context *context STREAMS_DC)
{
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper*)wrapper->abstract;
php_userstream_data_t *us;
zval zretval, zfuncname;
zval args[4];
int call_result;
php_stream *stream = NULL;
bool old_in_user_include;
/* Try to catch bad usage without preventing flexibility */
if (FG(user_stream_current_filename) != NULL && strcmp(filename, FG(user_stream_current_filename)) == 0) {
php_stream_wrapper_log_error(wrapper, options, "infinite recursion prevented");
return NULL;
}
FG(user_stream_current_filename) = filename;
/* if the user stream was registered as local and we are in include context,
we add allow_url_include restrictions to allow_url_fopen ones */
/* we need only is_url == 0 here since if is_url == 1 and remote wrappers
were restricted we wouldn't get here */
old_in_user_include = PG(in_user_include);
if(uwrap->wrapper.is_url == 0 &&
(options & STREAM_OPEN_FOR_INCLUDE) &&
!PG(allow_url_include)) {
PG(in_user_include) = 1;
}
us = emalloc(sizeof(*us));
us->wrapper = uwrap;
user_stream_create_object(uwrap, context, &us->object);
if (Z_TYPE(us->object) == IS_UNDEF) {
FG(user_stream_current_filename) = NULL;
PG(in_user_include) = old_in_user_include;
efree(us);
return NULL;
}
/* call it's stream_open method - set up params first */
ZVAL_STRING(&args[0], filename);
ZVAL_STRING(&args[1], mode);
ZVAL_LONG(&args[2], options);
ZVAL_NEW_REF(&args[3], &EG(uninitialized_zval));
ZVAL_STRING(&zfuncname, USERSTREAM_OPEN);
zend_try {
call_result = call_method_if_exists(&us->object, &zfuncname, &zretval, 4, args);
} zend_catch {
FG(user_stream_current_filename) = NULL;
zend_bailout();
} zend_end_try();
if (call_result == SUCCESS && Z_TYPE(zretval) != IS_UNDEF && zval_is_true(&zretval)) {
/* the stream is now open! */
stream = php_stream_alloc_rel(&php_stream_userspace_ops, us, 0, mode);
/* if the opened path is set, copy it out */
if (Z_ISREF(args[3]) && Z_TYPE_P(Z_REFVAL(args[3])) == IS_STRING && opened_path) {
*opened_path = zend_string_copy(Z_STR_P(Z_REFVAL(args[3])));
}
/* set wrapper data to be a reference to our object */
ZVAL_COPY(&stream->wrapperdata, &us->object);
GC_ADDREF(us->wrapper->resource);
} else {
php_stream_wrapper_log_error(wrapper, options, "\"%s::" USERSTREAM_OPEN "\" call failed",
ZSTR_VAL(us->wrapper->ce->name));
}
/* destroy everything else */
if (stream == NULL) {
zval_ptr_dtor(&us->object);
ZVAL_UNDEF(&us->object);
efree(us);
}
zval_ptr_dtor(&zretval);
zval_ptr_dtor(&zfuncname);
zval_ptr_dtor(&args[3]);
zval_ptr_dtor(&args[2]);
zval_ptr_dtor(&args[1]);
zval_ptr_dtor(&args[0]);
FG(user_stream_current_filename) = NULL;
PG(in_user_include) = old_in_user_include;
return stream;
}
static int user_wrapper_close(php_stream_wrapper *wrapper, php_stream *stream)
{
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper*)wrapper->abstract;
zend_list_delete(uwrap->resource);
// FIXME: Unused?
return 0;
}
static php_stream *user_wrapper_opendir(php_stream_wrapper *wrapper, const char *filename, const char *mode,
int options, zend_string **opened_path, php_stream_context *context STREAMS_DC)
{
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper*)wrapper->abstract;
php_userstream_data_t *us;
zval zretval, zfuncname;
zval args[2];
int call_result;
php_stream *stream = NULL;
/* Try to catch bad usage without preventing flexibility */
if (FG(user_stream_current_filename) != NULL && strcmp(filename, FG(user_stream_current_filename)) == 0) {
php_stream_wrapper_log_error(wrapper, options, "infinite recursion prevented");
return NULL;
}
FG(user_stream_current_filename) = filename;
us = emalloc(sizeof(*us));
us->wrapper = uwrap;
user_stream_create_object(uwrap, context, &us->object);
if (Z_TYPE(us->object) == IS_UNDEF) {
FG(user_stream_current_filename) = NULL;
efree(us);
return NULL;
}
/* call it's dir_open method - set up params first */
ZVAL_STRING(&args[0], filename);
ZVAL_LONG(&args[1], options);
ZVAL_STRING(&zfuncname, USERSTREAM_DIR_OPEN);
call_result = call_method_if_exists(&us->object, &zfuncname, &zretval, 2, args);
if (call_result == SUCCESS && Z_TYPE(zretval) != IS_UNDEF && zval_is_true(&zretval)) {
/* the stream is now open! */
stream = php_stream_alloc_rel(&php_stream_userspace_dir_ops, us, 0, mode);
/* set wrapper data to be a reference to our object */
ZVAL_COPY(&stream->wrapperdata, &us->object);
GC_ADDREF(us->wrapper->resource);
} else {
php_stream_wrapper_log_error(wrapper, options, "\"%s::" USERSTREAM_DIR_OPEN "\" call failed",
ZSTR_VAL(us->wrapper->ce->name));
}
/* destroy everything else */
if (stream == NULL) {
zval_ptr_dtor(&us->object);
ZVAL_UNDEF(&us->object);
efree(us);
}
zval_ptr_dtor(&zretval);
zval_ptr_dtor(&zfuncname);
zval_ptr_dtor(&args[1]);
zval_ptr_dtor(&args[0]);
FG(user_stream_current_filename) = NULL;
return stream;
}
/* {{{ Registers a custom URL protocol handler class */
PHP_FUNCTION(stream_wrapper_register)
{
zend_string *protocol;
struct php_user_stream_wrapper *uwrap;
zend_class_entry *ce = NULL;
zend_resource *rsrc;
zend_long flags = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "SC|l", &protocol, &ce, &flags) == FAILURE) {
RETURN_THROWS();
}
uwrap = (struct php_user_stream_wrapper *)ecalloc(1, sizeof(*uwrap));
uwrap->ce = ce;
uwrap->protoname = estrndup(ZSTR_VAL(protocol), ZSTR_LEN(protocol));
uwrap->wrapper.wops = &user_stream_wops;
uwrap->wrapper.abstract = uwrap;
uwrap->wrapper.is_url = ((flags & PHP_STREAM_IS_URL) != 0);
uwrap->resource = NULL;
rsrc = zend_register_resource(uwrap, le_protocols);
if (php_register_url_stream_wrapper_volatile(protocol, &uwrap->wrapper) == SUCCESS) {
uwrap->resource = rsrc;
RETURN_TRUE;
}
/* We failed. But why? */
if (zend_hash_exists(php_stream_get_url_stream_wrappers_hash(), protocol)) {
php_error_docref(NULL, E_WARNING, "Protocol %s:// is already defined.", ZSTR_VAL(protocol));
} else {
/* Hash doesn't exist so it must have been an invalid protocol scheme */
php_error_docref(NULL, E_WARNING, "Invalid protocol scheme specified. Unable to register wrapper class %s to %s://", ZSTR_VAL(uwrap->ce->name), ZSTR_VAL(protocol));
}
zend_list_delete(rsrc);
RETURN_FALSE;
}
/* }}} */
/* {{{ Unregister a wrapper for the life of the current request. */
PHP_FUNCTION(stream_wrapper_unregister)
{
zend_string *protocol;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &protocol) == FAILURE) {
RETURN_THROWS();
}
php_stream_wrapper *wrapper = zend_hash_find_ptr(php_stream_get_url_stream_wrappers_hash(), protocol);
if (php_unregister_url_stream_wrapper_volatile(protocol) == FAILURE) {
/* We failed */
php_error_docref(NULL, E_WARNING, "Unable to unregister protocol %s://", ZSTR_VAL(protocol));
RETURN_FALSE;
}
ZEND_ASSERT(wrapper != NULL);
if (wrapper->wops == &user_stream_wops) {
struct php_user_stream_wrapper *uwrap = (struct php_user_stream_wrapper *)wrapper;
// uwrap will be released by resource destructor
zend_list_delete(uwrap->resource);
}
RETURN_TRUE;
}
/* }}} */
/* {{{ Restore the original protocol handler, overriding if necessary */
PHP_FUNCTION(stream_wrapper_restore)
{
zend_string *protocol;
php_stream_wrapper *wrapper;
HashTable *global_wrapper_hash, *wrapper_hash;
if (zend_parse_parameters(ZEND_NUM_ARGS(), "S", &protocol) == FAILURE) {
RETURN_THROWS();
}
global_wrapper_hash = php_stream_get_url_stream_wrappers_hash_global();
if ((wrapper = zend_hash_find_ptr(global_wrapper_hash, protocol)) == NULL) {
php_error_docref(NULL, E_WARNING, "%s:// never existed, nothing to restore", ZSTR_VAL(protocol));
RETURN_FALSE;
}
wrapper_hash = php_stream_get_url_stream_wrappers_hash();
if (wrapper_hash == global_wrapper_hash || zend_hash_find_ptr(wrapper_hash, protocol) == wrapper) {
php_error_docref(NULL, E_NOTICE, "%s:// was never changed, nothing to restore", ZSTR_VAL(protocol));
RETURN_TRUE;
}
/* A failure here could be okay given that the protocol might have been merely unregistered */
php_unregister_url_stream_wrapper_volatile(protocol);
if (php_register_url_stream_wrapper_volatile(protocol, wrapper) == FAILURE) {
php_error_docref(NULL, E_WARNING, "Unable to restore original %s:// wrapper", ZSTR_VAL(protocol));
RETURN_FALSE;
}
RETURN_TRUE;
}
/* }}} */
static ssize_t php_userstreamop_write(php_stream *stream, const char *buf, size_t count)
{
zval func_name;
zval retval;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
zval args[1];
ssize_t didwrite;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_WRITE, sizeof(USERSTREAM_WRITE)-1);
ZVAL_STRINGL(&args[0], (char*)buf, count);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 1, args);
zval_ptr_dtor(&args[0]);
zval_ptr_dtor(&func_name);
if (EG(exception)) {
return -1;
}
if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF) {
if (Z_TYPE(retval) == IS_FALSE) {
didwrite = -1;
} else {
convert_to_long(&retval);
didwrite = Z_LVAL(retval);
}
} else {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_WRITE " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
didwrite = -1;
}
/* don't allow strange buffer overruns due to bogus return */
if (didwrite > 0 && didwrite > count) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_WRITE " wrote " ZEND_LONG_FMT " bytes more data than requested (" ZEND_LONG_FMT " written, " ZEND_LONG_FMT " max)",
ZSTR_VAL(us->wrapper->ce->name),
(zend_long)(didwrite - count), (zend_long)didwrite, (zend_long)count);
didwrite = count;
}
zval_ptr_dtor(&retval);
return didwrite;
}
static ssize_t php_userstreamop_read(php_stream *stream, char *buf, size_t count)
{
zval func_name;
zval retval;
zval args[1];
int call_result;
size_t didread = 0;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_READ, sizeof(USERSTREAM_READ)-1);
ZVAL_LONG(&args[0], count);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 1, args);
zval_ptr_dtor(&args[0]);
zval_ptr_dtor(&func_name);
if (EG(exception)) {
return -1;
}
if (call_result == FAILURE) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_READ " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
return -1;
}
if (Z_TYPE(retval) == IS_FALSE) {
return -1;
}
if (!try_convert_to_string(&retval)) {
zval_ptr_dtor(&retval);
return -1;
}
didread = Z_STRLEN(retval);
if (didread > 0) {
if (didread > count) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_READ " - read " ZEND_LONG_FMT " bytes more data than requested (" ZEND_LONG_FMT " read, " ZEND_LONG_FMT " max) - excess data will be lost",
ZSTR_VAL(us->wrapper->ce->name), (zend_long)(didread - count), (zend_long)didread, (zend_long)count);
didread = count;
}
memcpy(buf, Z_STRVAL(retval), didread);
}
zval_ptr_dtor(&retval);
ZVAL_UNDEF(&retval);
/* since the user stream has no way of setting the eof flag directly, we need to ask it if we hit eof */
ZVAL_STRINGL(&func_name, USERSTREAM_EOF, sizeof(USERSTREAM_EOF)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
zval_ptr_dtor(&func_name);
if (EG(exception)) {
stream->eof = 1;
return -1;
}
if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF && zval_is_true(&retval)) {
stream->eof = 1;
} else if (call_result == FAILURE) {
php_error_docref(NULL, E_WARNING,
"%s::" USERSTREAM_EOF " is not implemented! Assuming EOF",
ZSTR_VAL(us->wrapper->ce->name));
stream->eof = 1;
}
zval_ptr_dtor(&retval);
return didread;
}
static int php_userstreamop_close(php_stream *stream, int close_handle)
{
zval func_name;
zval retval;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_CLOSE, sizeof(USERSTREAM_CLOSE)-1);
call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
zval_ptr_dtor(&us->object);
ZVAL_UNDEF(&us->object);
efree(us);
return 0;
}
static int php_userstreamop_flush(php_stream *stream)
{
zval func_name;
zval retval;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_FLUSH, sizeof(USERSTREAM_FLUSH)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF && zval_is_true(&retval))
call_result = 0;
else
call_result = -1;
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
return call_result;
}
static int php_userstreamop_seek(php_stream *stream, zend_off_t offset, int whence, zend_off_t *newoffs)
{
zval func_name;
zval retval;
int call_result, ret;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
zval args[2];
assert(us != NULL);
ZVAL_STRINGL(&func_name, USERSTREAM_SEEK, sizeof(USERSTREAM_SEEK)-1);
ZVAL_LONG(&args[0], offset);
ZVAL_LONG(&args[1], whence);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 2, args);
zval_ptr_dtor(&args[0]);
zval_ptr_dtor(&args[1]);
zval_ptr_dtor(&func_name);
if (call_result == FAILURE) {
/* stream_seek is not implemented, so disable seeks for this stream */
stream->flags |= PHP_STREAM_FLAG_NO_SEEK;
/* there should be no retval to clean up */
zval_ptr_dtor(&retval);
return -1;
} else if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF && zval_is_true(&retval)) {
ret = 0;
} else {
ret = -1;
}
zval_ptr_dtor(&retval);
ZVAL_UNDEF(&retval);
if (ret) {
return ret;
}
/* now determine where we are */
ZVAL_STRINGL(&func_name, USERSTREAM_TELL, sizeof(USERSTREAM_TELL)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
if (call_result == SUCCESS && Z_TYPE(retval) == IS_LONG) {
*newoffs = Z_LVAL(retval);
ret = 0;
} else if (call_result == FAILURE) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_TELL " is not implemented!", ZSTR_VAL(us->wrapper->ce->name));
ret = -1;
} else {
ret = -1;
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
return ret;
}
/* parse the return value from one of the stat functions and store the
* relevant fields into the statbuf provided */
static int statbuf_from_array(zval *array, php_stream_statbuf *ssb)
{
zval *elem;
#define STAT_PROP_ENTRY_EX(name, name2) \
if (NULL != (elem = zend_hash_str_find(Z_ARRVAL_P(array), #name, sizeof(#name)-1))) { \
ssb->sb.st_##name2 = zval_get_long(elem); \
}
#define STAT_PROP_ENTRY(name) STAT_PROP_ENTRY_EX(name,name)
memset(ssb, 0, sizeof(php_stream_statbuf));
STAT_PROP_ENTRY(dev);
STAT_PROP_ENTRY(ino);
STAT_PROP_ENTRY(mode);
STAT_PROP_ENTRY(nlink);
STAT_PROP_ENTRY(uid);
STAT_PROP_ENTRY(gid);
#if HAVE_STRUCT_STAT_ST_RDEV
STAT_PROP_ENTRY(rdev);
#endif
STAT_PROP_ENTRY(size);
STAT_PROP_ENTRY(atime);
STAT_PROP_ENTRY(mtime);
STAT_PROP_ENTRY(ctime);
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
STAT_PROP_ENTRY(blksize);
#endif
#ifdef HAVE_STRUCT_STAT_ST_BLOCKS
STAT_PROP_ENTRY(blocks);
#endif
#undef STAT_PROP_ENTRY
#undef STAT_PROP_ENTRY_EX
return SUCCESS;
}
static int php_userstreamop_stat(php_stream *stream, php_stream_statbuf *ssb)
{
zval func_name;
zval retval;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
int ret = -1;
ZVAL_STRINGL(&func_name, USERSTREAM_STAT, sizeof(USERSTREAM_STAT)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
if (call_result == SUCCESS && Z_TYPE(retval) == IS_ARRAY) {
if (SUCCESS == statbuf_from_array(&retval, ssb))
ret = 0;
} else {
if (call_result == FAILURE) {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_STAT " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
}
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
return ret;
}
static int php_userstreamop_set_option(php_stream *stream, int option, int value, void *ptrparam) {
zval func_name;
zval retval;
int call_result;
php_userstream_data_t *us = (php_userstream_data_t *)stream->abstract;
int ret = PHP_STREAM_OPTION_RETURN_NOTIMPL;
zval args[3];
switch (option) {
case PHP_STREAM_OPTION_CHECK_LIVENESS:
ZVAL_STRINGL(&func_name, USERSTREAM_EOF, sizeof(USERSTREAM_EOF)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 0, NULL);
if (call_result == SUCCESS && (Z_TYPE(retval) == IS_FALSE || Z_TYPE(retval) == IS_TRUE)) {
ret = zval_is_true(&retval) ? PHP_STREAM_OPTION_RETURN_ERR : PHP_STREAM_OPTION_RETURN_OK;
} else {
ret = PHP_STREAM_OPTION_RETURN_ERR;
php_error_docref(NULL, E_WARNING,
"%s::" USERSTREAM_EOF " is not implemented! Assuming EOF",
ZSTR_VAL(us->wrapper->ce->name));
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
break;
case PHP_STREAM_OPTION_LOCKING:
ZVAL_LONG(&args[0], 0);
if (value & LOCK_NB) {
Z_LVAL_P(&args[0]) |= PHP_LOCK_NB;
}
switch(value & ~LOCK_NB) {
case LOCK_SH:
Z_LVAL_P(&args[0]) |= PHP_LOCK_SH;
break;
case LOCK_EX:
Z_LVAL_P(&args[0]) |= PHP_LOCK_EX;
break;
case LOCK_UN:
Z_LVAL_P(&args[0]) |= PHP_LOCK_UN;
break;
}
/* TODO wouldblock */
ZVAL_STRINGL(&func_name, USERSTREAM_LOCK, sizeof(USERSTREAM_LOCK)-1);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 1, args);
if (call_result == SUCCESS && (Z_TYPE(retval) == IS_FALSE || Z_TYPE(retval) == IS_TRUE)) {
ret = (Z_TYPE(retval) == IS_FALSE);
} else if (call_result == FAILURE) {
if (value == 0) {
/* lock support test (TODO: more check) */
ret = PHP_STREAM_OPTION_RETURN_OK;
} else {
php_error_docref(NULL, E_WARNING, "%s::" USERSTREAM_LOCK " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
ret = PHP_STREAM_OPTION_RETURN_ERR;
}
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&func_name);
zval_ptr_dtor(&args[0]);
break;
case PHP_STREAM_OPTION_TRUNCATE_API:
ZVAL_STRINGL(&func_name, USERSTREAM_TRUNCATE, sizeof(USERSTREAM_TRUNCATE)-1);
switch (value) {
case PHP_STREAM_TRUNCATE_SUPPORTED:
if (zend_is_callable_ex(&func_name, Z_OBJ(us->object), 0, NULL, NULL, NULL))
ret = PHP_STREAM_OPTION_RETURN_OK;
else
ret = PHP_STREAM_OPTION_RETURN_ERR;
break;
case PHP_STREAM_TRUNCATE_SET_SIZE: {
ptrdiff_t new_size = *(ptrdiff_t*) ptrparam;
if (new_size >= 0 && new_size <= (ptrdiff_t)LONG_MAX) {
ZVAL_LONG(&args[0], (zend_long)new_size);
call_result = call_method_if_exists(&us->object, &func_name, &retval, 1, args);
if (call_result == SUCCESS && Z_TYPE(retval) != IS_UNDEF) {
if (Z_TYPE(retval) == IS_FALSE || Z_TYPE(retval) == IS_TRUE) {
ret = (Z_TYPE(retval) == IS_TRUE) ? PHP_STREAM_OPTION_RETURN_OK :
PHP_STREAM_OPTION_RETURN_ERR;
} else {
php_error_docref(NULL, E_WARNING,
"%s::" USERSTREAM_TRUNCATE " did not return a boolean!",
ZSTR_VAL(us->wrapper->ce->name));
}
} else {
php_error_docref(NULL, E_WARNING,
"%s::" USERSTREAM_TRUNCATE " is not implemented!",
ZSTR_VAL(us->wrapper->ce->name));
}
zval_ptr_dtor(&retval);
zval_ptr_dtor(&args[0]);
} else { /* bad new size */
ret = PHP_STREAM_OPTION_RETURN_ERR;
}
break;
}
}
zval_ptr_dtor(&func_name);
break;
case PHP_STREAM_OPTION_READ_BUFFER:
case PHP_STREAM_OPTION_WRITE_BUFFER:
case PHP_STREAM_OPTION_READ_TIMEOUT:
case PHP_STREAM_OPTION_BLOCKING: {
ZVAL_STRINGL(&func_name, USERSTREAM_SET_OPTION, sizeof(USERSTREAM_SET_OPTION)-1);
ZVAL_LONG(&args[0], option);
ZVAL_NULL(&args[1]);