Repository navigation
Expand file tree
/
Copy pathpreconfig.c
More file actions
948 lines (782 loc) · 23.5 KB
/
Copy pathpreconfig.c
File metadata and controls
948 lines (782 loc) · 23.5 KB
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
#include "Python.h"
#include "pycore_coreconfig.h"
#include "pycore_getopt.h"
#include "pycore_pystate.h" /* _PyRuntime_Initialize() */
#include <locale.h> /* setlocale() */
#define DECODE_LOCALE_ERR(NAME, LEN) \
(((LEN) == -2) \
? _Py_INIT_USER_ERR("cannot decode " NAME) \
: _Py_INIT_NO_MEMORY())
/* --- File system encoding/errors -------------------------------- */
/* The filesystem encoding is chosen by config_init_fs_encoding(),
see also initfsencoding(). */
const char *Py_FileSystemDefaultEncoding = NULL;
int Py_HasFileSystemDefaultEncoding = 0;
const char *Py_FileSystemDefaultEncodeErrors = NULL;
int _Py_HasFileSystemDefaultEncodeErrors = 0;
void
_Py_ClearFileSystemEncoding(void)
{
if (!Py_HasFileSystemDefaultEncoding && Py_FileSystemDefaultEncoding) {
PyMem_RawFree((char*)Py_FileSystemDefaultEncoding);
Py_FileSystemDefaultEncoding = NULL;
}
if (!_Py_HasFileSystemDefaultEncodeErrors && Py_FileSystemDefaultEncodeErrors) {
PyMem_RawFree((char*)Py_FileSystemDefaultEncodeErrors);
Py_FileSystemDefaultEncodeErrors = NULL;
}
}
/* Set Py_FileSystemDefaultEncoding and Py_FileSystemDefaultEncodeErrors
global configuration variables. */
int
_Py_SetFileSystemEncoding(const char *encoding, const char *errors)
{
char *encoding2 = _PyMem_RawStrdup(encoding);
if (encoding2 == NULL) {
return -1;
}
char *errors2 = _PyMem_RawStrdup(errors);
if (errors2 == NULL) {
PyMem_RawFree(encoding2);
return -1;
}
_Py_ClearFileSystemEncoding();
Py_FileSystemDefaultEncoding = encoding2;
Py_HasFileSystemDefaultEncoding = 0;
Py_FileSystemDefaultEncodeErrors = errors2;
_Py_HasFileSystemDefaultEncodeErrors = 0;
return 0;
}
/* --- _PyArgv ---------------------------------------------------- */
_PyInitError
_PyArgv_AsWstrList(const _PyArgv *args, _PyWstrList *list)
{
_PyWstrList wargv = _PyWstrList_INIT;
if (args->use_bytes_argv) {
size_t size = sizeof(wchar_t*) * args->argc;
wargv.items = (wchar_t **)PyMem_RawMalloc(size);
if (wargv.items == NULL) {
return _Py_INIT_NO_MEMORY();
}
for (Py_ssize_t i = 0; i < args->argc; i++) {
size_t len;
wchar_t *arg = Py_DecodeLocale(args->bytes_argv[i], &len);
if (arg == NULL) {
_PyWstrList_Clear(&wargv);
return DECODE_LOCALE_ERR("command line arguments",
(Py_ssize_t)len);
}
wargv.items[i] = arg;
wargv.length++;
}
_PyWstrList_Clear(list);
*list = wargv;
}
else {
wargv.length = args->argc;
wargv.items = args->wchar_argv;
if (_PyWstrList_Copy(list, &wargv) < 0) {
return _Py_INIT_NO_MEMORY();
}
}
return _Py_INIT_OK();
}
/* --- _PyPreCmdline ------------------------------------------------- */
void
_PyPreCmdline_Clear(_PyPreCmdline *cmdline)
{
_PyWstrList_Clear(&cmdline->argv);
_PyWstrList_Clear(&cmdline->xoptions);
}
int
_PyPreCmdline_Copy(_PyPreCmdline *cmdline, const _PyPreCmdline *cmdline2)
{
_PyPreCmdline_Clear(cmdline);
if (_PyWstrList_Copy(&cmdline->argv, &cmdline2->argv) < 0) {
return -1;
}
if (_PyWstrList_Copy(&cmdline->xoptions, &cmdline2->xoptions) < 0) {
return -1;
}
cmdline->use_environment = cmdline2->use_environment;
cmdline->isolated = cmdline2->isolated;
return 0;
}
_PyInitError
_PyPreCmdline_SetArgv(_PyPreCmdline *cmdline, const _PyArgv *args)
{
return _PyArgv_AsWstrList(args, &cmdline->argv);
}
void
_PyPreCmdline_GetPreConfig(_PyPreCmdline *cmdline, const _PyPreConfig *config)
{
#define COPY_ATTR(ATTR) \
if (config->ATTR != -1) { \
cmdline->ATTR = config->ATTR; \
}
COPY_ATTR(use_environment);
COPY_ATTR(isolated);
#undef COPY_ATTR
}
void
_PyPreCmdline_GetCoreConfig(_PyPreCmdline *cmdline, const _PyCoreConfig *config)
{
#define COPY_ATTR(ATTR) \
if (config->preconfig.ATTR != -1) { \
cmdline->ATTR = config->preconfig.ATTR; \
}
COPY_ATTR(use_environment);
COPY_ATTR(isolated);
#undef COPY_ATTR
}
void
_PyPreCmdline_SetCoreConfig(const _PyPreCmdline *cmdline, _PyCoreConfig *config)
{
#define COPY_ATTR(ATTR) \
if (config->preconfig.ATTR == -1 && cmdline->ATTR != -1) { \
config->preconfig.ATTR = cmdline->ATTR; \
}
COPY_ATTR(use_environment);
COPY_ATTR(isolated);
#undef COPY_ATTR
}
/* --- _PyPreConfig ----------------------------------------------- */
void
_PyPreConfig_Clear(_PyPreConfig *config)
{
PyMem_RawFree(config->allocator);
config->allocator = NULL;
}
int
_PyPreConfig_Copy(_PyPreConfig *config, const _PyPreConfig *config2)
{
_PyPreConfig_Clear(config);
#define COPY_ATTR(ATTR) config->ATTR = config2->ATTR
#define COPY_STR_ATTR(ATTR) \
do { \
if (config2->ATTR != NULL) { \
config->ATTR = _PyMem_RawStrdup(config2->ATTR); \
if (config->ATTR == NULL) { \
return -1; \
} \
} \
} while (0)
COPY_ATTR(isolated);
COPY_ATTR(use_environment);
COPY_ATTR(coerce_c_locale);
COPY_ATTR(coerce_c_locale_warn);
#ifdef MS_WINDOWS
COPY_ATTR(legacy_windows_fs_encoding);
#endif
COPY_ATTR(utf8_mode);
COPY_ATTR(dev_mode);
COPY_STR_ATTR(allocator);
#undef COPY_ATTR
#undef COPY_STR_ATTR
return 0;
}
void
_PyPreConfig_GetGlobalConfig(_PyPreConfig *config)
{
#define COPY_FLAG(ATTR, VALUE) \
if (config->ATTR == -1) { \
config->ATTR = VALUE; \
}
#define COPY_NOT_FLAG(ATTR, VALUE) \
if (config->ATTR == -1) { \
config->ATTR = !(VALUE); \
}
COPY_FLAG(isolated, Py_IsolatedFlag);
COPY_NOT_FLAG(use_environment, Py_IgnoreEnvironmentFlag);
#ifdef MS_WINDOWS
COPY_FLAG(legacy_windows_fs_encoding, Py_LegacyWindowsFSEncodingFlag);
#endif
COPY_FLAG(utf8_mode, Py_UTF8Mode);
#undef COPY_FLAG
#undef COPY_NOT_FLAG
}
void
_PyPreConfig_SetGlobalConfig(const _PyPreConfig *config)
{
#define COPY_FLAG(ATTR, VAR) \
if (config->ATTR != -1) { \
VAR = config->ATTR; \
}
#define COPY_NOT_FLAG(ATTR, VAR) \
if (config->ATTR != -1) { \
VAR = !config->ATTR; \
}
COPY_FLAG(isolated, Py_IsolatedFlag);
COPY_NOT_FLAG(use_environment, Py_IgnoreEnvironmentFlag);
#ifdef MS_WINDOWS
COPY_FLAG(legacy_windows_fs_encoding, Py_LegacyWindowsFSEncodingFlag);
#endif
COPY_FLAG(utf8_mode, Py_UTF8Mode);
#undef COPY_FLAG
#undef COPY_NOT_FLAG
}
const char*
_Py_GetEnv(int use_environment, const char *name)
{
assert(use_environment >= 0);
if (!use_environment) {
return NULL;
}
const char *var = getenv(name);
if (var && var[0] != '\0') {
return var;
}
else {
return NULL;
}
}
static const char*
_PyPreConfig_GetEnv(const _PyPreConfig *config, const char *name)
{
return _Py_GetEnv(config->use_environment, name);
}
int
_Py_str_to_int(const char *str, int *result)
{
const char *endptr = str;
errno = 0;
long value = strtol(str, (char **)&endptr, 10);
if (*endptr != '\0' || errno == ERANGE) {
return -1;
}
if (value < INT_MIN || value > INT_MAX) {
return -1;
}
*result = (int)value;
return 0;
}
void
_Py_get_env_flag(int use_environment, int *flag, const char *name)
{
const char *var = _Py_GetEnv(use_environment, name);
if (!var) {
return;
}
int value;
if (_Py_str_to_int(var, &value) < 0 || value < 0) {
/* PYTHONDEBUG=text and PYTHONDEBUG=-2 behave as PYTHONDEBUG=1 */
value = 1;
}
if (*flag < value) {
*flag = value;
}
}
const wchar_t*
_Py_get_xoption(const _PyWstrList *xoptions, const wchar_t *name)
{
for (Py_ssize_t i=0; i < xoptions->length; i++) {
const wchar_t *option = xoptions->items[i];
size_t len;
wchar_t *sep = wcschr(option, L'=');
if (sep != NULL) {
len = (sep - option);
}
else {
len = wcslen(option);
}
if (wcsncmp(option, name, len) == 0 && name[len] == L'\0') {
return option;
}
}
return NULL;
}
static _PyInitError
preconfig_init_utf8_mode(_PyPreConfig *config, const _PyPreCmdline *cmdline)
{
const wchar_t *xopt;
if (cmdline) {
xopt = _Py_get_xoption(&cmdline->xoptions, L"utf8");
}
else {
xopt = NULL;
}
if (xopt) {
wchar_t *sep = wcschr(xopt, L'=');
if (sep) {
xopt = sep + 1;
if (wcscmp(xopt, L"1") == 0) {
config->utf8_mode = 1;
}
else if (wcscmp(xopt, L"0") == 0) {
config->utf8_mode = 0;
}
else {
return _Py_INIT_USER_ERR("invalid -X utf8 option value");
}
}
else {
config->utf8_mode = 1;
}
return _Py_INIT_OK();
}
const char *opt = _PyPreConfig_GetEnv(config, "PYTHONUTF8");
if (opt) {
if (strcmp(opt, "1") == 0) {
config->utf8_mode = 1;
}
else if (strcmp(opt, "0") == 0) {
config->utf8_mode = 0;
}
else {
return _Py_INIT_USER_ERR("invalid PYTHONUTF8 environment "
"variable value");
}
return _Py_INIT_OK();
}
return _Py_INIT_OK();
}
static void
preconfig_init_locale(_PyPreConfig *config)
{
/* The C locale enables the C locale coercion (PEP 538) */
if (_Py_LegacyLocaleDetected()) {
config->coerce_c_locale = 2;
}
else {
config->coerce_c_locale = 0;
}
}
static _PyInitError
preconfig_read(_PyPreConfig *config, _PyPreCmdline *cmdline)
{
_PyInitError err;
err = _PyPreCmdline_Read(cmdline);
if (_Py_INIT_FAILED(err)) {
return err;
}
_PyPreCmdline_SetPreConfig(cmdline, config);
_PyPreConfig_GetGlobalConfig(config);
/* isolated and use_environment */
if (config->isolated > 0) {
config->use_environment = 0;
}
/* Default values */
if (config->use_environment < 0) {
config->use_environment = 0;
}
/* legacy_windows_fs_encoding, utf8_mode, coerce_c_locale */
if (config->use_environment) {
#ifdef MS_WINDOWS
_Py_get_env_flag(config->use_environment,
&config->legacy_windows_fs_encoding,
"PYTHONLEGACYWINDOWSFSENCODING");
#endif
const char *env = _PyPreConfig_GetEnv(config, "PYTHONCOERCECLOCALE");
if (env) {
if (strcmp(env, "0") == 0) {
if (config->coerce_c_locale < 0) {
config->coerce_c_locale = 0;
}
}
else if (strcmp(env, "warn") == 0) {
config->coerce_c_locale_warn = 1;
}
else {
if (config->coerce_c_locale < 0) {
config->coerce_c_locale = 1;
}
}
}
}
#ifdef MS_WINDOWS
if (config->legacy_windows_fs_encoding) {
config->utf8_mode = 0;
}
#endif
if (config->utf8_mode < 0) {
err = preconfig_init_utf8_mode(config, cmdline);
if (_Py_INIT_FAILED(err)) {
return err;
}
}
/* Test also if coerce_c_locale equals 1: PYTHONCOERCECLOCALE=1 doesn't
imply that the C locale is always coerced. It is only coerced if
if the LC_CTYPE locale is "C". */
if (config->coerce_c_locale != 0 && config->coerce_c_locale != 2) {
preconfig_init_locale(config);
}
#ifndef MS_WINDOWS
if (config->utf8_mode < 0) {
/* The C locale and the POSIX locale enable the UTF-8 Mode (PEP 540) */
const char *ctype_loc = setlocale(LC_CTYPE, NULL);
if (ctype_loc != NULL
&& (strcmp(ctype_loc, "C") == 0
|| strcmp(ctype_loc, "POSIX") == 0))
{
config->utf8_mode = 1;
}
}
#endif
if (config->coerce_c_locale < 0) {
config->coerce_c_locale = 0;
}
if (config->utf8_mode < 0) {
config->utf8_mode = 0;
}
if (config->coerce_c_locale < 0) {
config->coerce_c_locale = 0;
}
/* dev_mode */
if ((cmdline && _Py_get_xoption(&cmdline->xoptions, L"dev"))
|| _PyPreConfig_GetEnv(config, "PYTHONDEVMODE"))
{
config->dev_mode = 1;
}
if (config->dev_mode < 0) {
config->dev_mode = 0;
}
/* allocator */
if (config->allocator == NULL) {
/* bpo-34247. The PYTHONMALLOC environment variable has the priority
over PYTHONDEV env var and "-X dev" command line option.
For example, PYTHONMALLOC=malloc PYTHONDEVMODE=1 sets the memory
allocators to "malloc" (and not to "debug"). */
const char *allocator = _PyPreConfig_GetEnv(config, "PYTHONMALLOC");
if (allocator) {
config->allocator = _PyMem_RawStrdup(allocator);
if (config->allocator == NULL) {
return _Py_INIT_NO_MEMORY();
}
}
}
if (config->dev_mode && config->allocator == NULL) {
config->allocator = _PyMem_RawStrdup("debug");
if (config->allocator == NULL) {
return _Py_INIT_NO_MEMORY();
}
}
assert(config->coerce_c_locale >= 0);
assert(config->utf8_mode >= 0);
assert(config->isolated >= 0);
assert(config->use_environment >= 0);
assert(config->dev_mode >= 0);
return _Py_INIT_OK();
}
static _PyInitError
get_ctype_locale(char **locale_p)
{
const char *loc = setlocale(LC_CTYPE, NULL);
if (loc == NULL) {
return _Py_INIT_ERR("failed to LC_CTYPE locale");
}
char *copy = _PyMem_RawStrdup(loc);
if (copy == NULL) {
return _Py_INIT_NO_MEMORY();
}
*locale_p = copy;
return _Py_INIT_OK();
}
void
_PyPreCmdline_SetPreConfig(const _PyPreCmdline *cmdline, _PyPreConfig *config)
{
#define COPY_ATTR(ATTR) \
if (cmdline->ATTR != -1) { \
config->ATTR = cmdline->ATTR; \
}
COPY_ATTR(use_environment);
COPY_ATTR(isolated);
#undef COPY_ATTR
}
PyObject*
_PyPreConfig_AsDict(const _PyPreConfig *config)
{
PyObject *dict;
dict = PyDict_New();
if (dict == NULL) {
return NULL;
}
#define SET_ITEM(KEY, EXPR) \
do { \
PyObject *obj = (EXPR); \
if (obj == NULL) { \
goto fail; \
} \
int res = PyDict_SetItemString(dict, (KEY), obj); \
Py_DECREF(obj); \
if (res < 0) { \
goto fail; \
} \
} while (0)
#define SET_ITEM_INT(ATTR) \
SET_ITEM(#ATTR, PyLong_FromLong(config->ATTR))
#define FROM_STRING(STR) \
((STR != NULL) ? \
PyUnicode_FromString(STR) \
: (Py_INCREF(Py_None), Py_None))
#define SET_ITEM_STR(ATTR) \
SET_ITEM(#ATTR, FROM_STRING(config->ATTR))
SET_ITEM_INT(isolated);
SET_ITEM_INT(use_environment);
SET_ITEM_INT(coerce_c_locale);
SET_ITEM_INT(coerce_c_locale_warn);
SET_ITEM_INT(utf8_mode);
#ifdef MS_WINDOWS
SET_ITEM_INT(legacy_windows_fs_encoding);
#endif
SET_ITEM_INT(dev_mode);
SET_ITEM_STR(allocator);
return dict;
fail:
Py_DECREF(dict);
return NULL;
#undef FROM_STRING
#undef SET_ITEM
#undef SET_ITEM_INT
#undef SET_ITEM_STR
}
/* Parse the command line arguments */
_PyInitError
_PyPreCmdline_Read(_PyPreCmdline *cmdline)
{
_PyWstrList *argv = &cmdline->argv;
_PyOS_ResetGetOpt();
/* Don't log parsing errors into stderr here: _PyCoreConfig_ReadFromArgv()
is responsible for that */
_PyOS_opterr = 0;
do {
int longindex = -1;
int c = _PyOS_GetOpt(argv->length, argv->items, &longindex);
if (c == EOF || c == 'c' || c == 'm') {
break;
}
switch (c) {
case 'E':
cmdline->use_environment = 0;
break;
case 'I':
cmdline->isolated = 1;
break;
case 'X':
{
if (_PyWstrList_Append(&cmdline->xoptions, _PyOS_optarg) < 0) {
return _Py_INIT_NO_MEMORY();
}
break;
}
default:
/* ignore other argument:
handled by _PyCoreConfig_ReadFromArgv() */
break;
}
} while (1);
return _Py_INIT_OK();
}
/* Read the configuration from:
- environment variables
- Py_xxx global configuration variables
- the LC_CTYPE locale
See _PyPreConfig_ReadFromArgv() to parse also command line arguments. */
_PyInitError
_PyPreConfig_Read(_PyPreConfig *config, const _PyArgv *args,
const _PyCoreConfig *coreconfig)
{
_PyInitError err;
_PyPreCmdline cmdline = _PyPreCmdline_INIT;
char *old_loc = NULL;
err = get_ctype_locale(&old_loc);
if (_Py_INIT_FAILED(err)) {
goto done;
}
/* Set LC_CTYPE to the user preferred locale */
_Py_SetLocaleFromEnv(LC_CTYPE);
_PyPreConfig_GetGlobalConfig(config);
_PyPreCmdline_GetPreConfig(&cmdline, config);
if (coreconfig) {
_PyPreCmdline_GetCoreConfig(&cmdline, coreconfig);
if (config->dev_mode == -1) {
config->dev_mode = coreconfig->preconfig.dev_mode;
}
}
if (args) {
err = _PyPreCmdline_SetArgv(&cmdline, args);
if (_Py_INIT_FAILED(err)) {
goto done;
}
}
err = preconfig_read(config, &cmdline);
done:
if (old_loc != NULL) {
setlocale(LC_CTYPE, old_loc);
PyMem_RawFree(old_loc);
}
_PyPreCmdline_Clear(&cmdline);
return err;
}
/* Read the configuration from:
- command line arguments
- environment variables
- Py_xxx global configuration variables
- the LC_CTYPE locale
See _PyPreConfig_ReadFromArgv() to parse also command line arguments. */
_PyInitError
_PyPreConfig_ReadFromArgv(_PyPreConfig *config, const _PyArgv *args)
{
_PyInitError err;
err = _PyRuntime_Initialize();
if (_Py_INIT_FAILED(err)) {
return err;
}
char *init_ctype_locale = NULL;
int init_utf8_mode = Py_UTF8Mode;
#ifdef MS_WINDOWS
int init_legacy_encoding = Py_LegacyWindowsFSEncodingFlag;
#endif
_PyPreConfig save_config = _PyPreConfig_INIT;
int locale_coerced = 0;
int loops = 0;
err = get_ctype_locale(&init_ctype_locale);
if (_Py_INIT_FAILED(err)) {
goto done;
}
_PyPreConfig_GetGlobalConfig(config);
if (_PyPreConfig_Copy(&save_config, config) < 0) {
err = _Py_INIT_NO_MEMORY();
goto done;
}
/* Set LC_CTYPE to the user preferred locale */
_Py_SetLocaleFromEnv(LC_CTYPE);
while (1) {
int utf8_mode = config->utf8_mode;
/* Watchdog to prevent an infinite loop */
loops++;
if (loops == 3) {
err = _Py_INIT_ERR("Encoding changed twice while "
"reading the configuration");
goto done;
}
/* bpo-34207: Py_DecodeLocale() and Py_EncodeLocale() depend
on Py_UTF8Mode and Py_LegacyWindowsFSEncodingFlag. */
Py_UTF8Mode = config->utf8_mode;
#ifdef MS_WINDOWS
Py_LegacyWindowsFSEncodingFlag = config->legacy_windows_fs_encoding;
#endif
err = _PyPreConfig_Read(config, args, NULL);
if (_Py_INIT_FAILED(err)) {
goto done;
}
/* The legacy C locale assumes ASCII as the default text encoding, which
* causes problems not only for the CPython runtime, but also other
* components like GNU readline.
*
* Accordingly, when the CLI detects it, it attempts to coerce it to a
* more capable UTF-8 based alternative.
*
* See the documentation of the PYTHONCOERCECLOCALE setting for more
* details.
*/
int encoding_changed = 0;
if (config->coerce_c_locale && !locale_coerced) {
locale_coerced = 1;
_Py_CoerceLegacyLocale(0);
encoding_changed = 1;
}
if (utf8_mode == -1) {
if (config->utf8_mode == 1) {
/* UTF-8 Mode enabled */
encoding_changed = 1;
}
}
else {
if (config->utf8_mode != utf8_mode) {
encoding_changed = 1;
}
}
if (!encoding_changed) {
break;
}
/* Reset the configuration before reading again the configuration,
just keep UTF-8 Mode value. */
int new_utf8_mode = config->utf8_mode;
int new_coerce_c_locale = config->coerce_c_locale;
if (_PyPreConfig_Copy(config, &save_config) < 0) {
err = _Py_INIT_NO_MEMORY();
goto done;
}
config->utf8_mode = new_utf8_mode;
config->coerce_c_locale = new_coerce_c_locale;
/* The encoding changed: read again the configuration
with the new encoding */
}
err = _Py_INIT_OK();
done:
if (init_ctype_locale != NULL) {
setlocale(LC_CTYPE, init_ctype_locale);
PyMem_RawFree(init_ctype_locale);
}
_PyPreConfig_Clear(&save_config);
Py_UTF8Mode = init_utf8_mode ;
#ifdef MS_WINDOWS
Py_LegacyWindowsFSEncodingFlag = init_legacy_encoding;
#endif
return err;
}
static _PyInitError
_PyPreConfig_SetAllocator(_PyPreConfig *config)
{
assert(!_PyRuntime.core_initialized);
PyMemAllocatorEx old_alloc;
PyMem_GetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
if (_PyMem_SetupAllocators(config->allocator) < 0) {
return _Py_INIT_USER_ERR("Unknown PYTHONMALLOC allocator");
}
/* Copy the pre-configuration with the new allocator */
_PyPreConfig config2 = _PyPreConfig_INIT;
if (_PyPreConfig_Copy(&config2, config) < 0) {
_PyPreConfig_Clear(&config2);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
return _Py_INIT_NO_MEMORY();
}
/* Free the old config and replace config with config2. Since config now
owns the data, don't free config2. */
PyMemAllocatorEx new_alloc;
PyMem_GetAllocator(PYMEM_DOMAIN_RAW, &new_alloc);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
_PyPreConfig_Clear(config);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &new_alloc);
*config = config2;
return _Py_INIT_OK();
}
/* Write the pre-configuration:
- set the memory allocators
- set Py_xxx global configuration variables
- set the LC_CTYPE locale (coerce C locale, PEP 538) and set the UTF-8 mode
(PEP 540)
If the memory allocator is changed, config is re-allocated with new
allocator. So calling _PyPreConfig_Clear(config) is safe after this call.
Do nothing if called after Py_Initialize(): ignore the new
pre-configuration. */
_PyInitError
_PyPreConfig_Write(_PyPreConfig *config)
{
if (_PyRuntime.core_initialized) {
/* bpo-34008: Calling this functions after Py_Initialize() ignores
the new configuration. */
return _Py_INIT_OK();
}
if (config->allocator != NULL) {
_PyInitError err = _PyPreConfig_SetAllocator(config);
if (_Py_INIT_FAILED(err)) {
return err;
}
}
_PyPreConfig_SetGlobalConfig(config);
if (config->coerce_c_locale) {
_Py_CoerceLegacyLocale(config->coerce_c_locale_warn);
}
/* Set LC_CTYPE to the user preferred locale */
_Py_SetLocaleFromEnv(LC_CTYPE);
/* Write the new pre-configuration into _PyRuntime */
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
int res = _PyPreConfig_Copy(&_PyRuntime.preconfig, config);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
if (res < 0) {
return _Py_INIT_NO_MEMORY();
}
return _Py_INIT_OK();
}