#include "Python.h"

#include "internal/pystate.h"

#include <locale.h>

#define DECODE_LOCALE_ERR(NAME, LEN) \

(((LEN) == -2) \

? _Py_INIT_USER_ERR("cannot decode " NAME) \

: _Py_INIT_NO_MEMORY())

/* Global configuration variables */

/* The default encoding used by the platform file system APIs

Can remain NULL for all platforms that don't have such a concept

Don't forget to modify PyUnicode_DecodeFSDefault() if you touch any of the

values for Py_FileSystemDefaultEncoding!

*/

#if defined(__APPLE__)

const char *Py_FileSystemDefaultEncoding = "utf-8";

int Py_HasFileSystemDefaultEncoding = 1;

#elif defined(MS_WINDOWS)

/* may be changed by initfsencoding(), but should never be free()d */

const char *Py_FileSystemDefaultEncoding = "utf-8";

int Py_HasFileSystemDefaultEncoding = 1;

#else

const char *Py_FileSystemDefaultEncoding = NULL; /* set by initfsencoding() */

int Py_HasFileSystemDefaultEncoding = 0;

#endif

const char *Py_FileSystemDefaultEncodeErrors = "surrogateescape";

/* UTF-8 mode (PEP 540): if equals to 1, use the UTF-8 encoding, and change

stdin and stdout error handler to "surrogateescape". It is equal to

-1 by default: unknown, will be set by Py_Main() */

int Py_UTF8Mode = -1;

int Py_DebugFlag = 0; /* Needed by parser.c */

int Py_VerboseFlag = 0; /* Needed by import.c */

int Py_QuietFlag = 0; /* Needed by sysmodule.c */

int Py_InteractiveFlag = 0; /* Needed by Py_FdIsInteractive() below */

int Py_InspectFlag = 0; /* Needed to determine whether to exit at SystemExit */

int Py_OptimizeFlag = 0; /* Needed by compile.c */

int Py_NoSiteFlag = 0; /* Suppress 'import site' */

int Py_BytesWarningFlag = 0; /* Warn on str(bytes) and str(buffer) */

int Py_FrozenFlag = 0; /* Needed by getpath.c */

int Py_IgnoreEnvironmentFlag = 0; /* e.g. PYTHONPATH, PYTHONHOME */

int Py_DontWriteBytecodeFlag = 0; /* Suppress writing bytecode files (*.pyc) */

int Py_NoUserSiteDirectory = 0; /* for -s and site.py */

int Py_UnbufferedStdioFlag = 0; /* Unbuffered binary std{in,out,err} */

int Py_HashRandomizationFlag = 0; /* for -R and PYTHONHASHSEED */

int Py_IsolatedFlag = 0; /* for -I, isolate from user's env */

#ifdef MS_WINDOWS

int Py_LegacyWindowsFSEncodingFlag = 0; /* Uses mbcs instead of utf-8 */

int Py_LegacyWindowsStdioFlag = 0; /* Uses FileIO instead of WindowsConsoleIO */

#endif

void

_Py_wstrlist_clear(int len, wchar_t **list)

{

for (int i=0; i < len; i++) {

PyMem_RawFree(list[i]);

}

PyMem_RawFree(list);

}

wchar_t**

_Py_wstrlist_copy(int len, wchar_t **list)

{

assert((len > 0 && list != NULL) || len == 0);

size_t size = len * sizeof(list[0]);

wchar_t **list_copy = PyMem_RawMalloc(size);

if (list_copy == NULL) {

return NULL;

}

for (int i=0; i < len; i++) {

wchar_t* arg = _PyMem_RawWcsdup(list[i]);

if (arg == NULL) {

_Py_wstrlist_clear(i, list_copy);

return NULL;

}

list_copy[i] = arg;

}

return list_copy;

}

/* Free memory allocated in config, but don't clear all attributes */

void

_PyCoreConfig_Clear(_PyCoreConfig *config)

{

#define CLEAR(ATTR) \

do { \

PyMem_RawFree(ATTR); \

ATTR = NULL; \

} while (0)

#define CLEAR_WSTRLIST(LEN, LIST) \

do { \

_Py_wstrlist_clear(LEN, LIST); \

LEN = 0; \

LIST = NULL; \

} while (0)

CLEAR(config->pycache_prefix);

CLEAR(config->module_search_path_env);

CLEAR(config->home);

CLEAR(config->program_name);

CLEAR(config->program);

CLEAR_WSTRLIST(config->argc, config->argv);

config->argc = -1;

CLEAR_WSTRLIST(config->nwarnoption, config->warnoptions);

CLEAR_WSTRLIST(config->nxoption, config->xoptions);

CLEAR_WSTRLIST(config->nmodule_search_path, config->module_search_paths);

config->nmodule_search_path = -1;

CLEAR(config->executable);

CLEAR(config->prefix);

CLEAR(config->base_prefix);

CLEAR(config->exec_prefix);

#ifdef MS_WINDOWS

CLEAR(config->dll_path);

#endif

CLEAR(config->base_exec_prefix);

#undef CLEAR

#undef CLEAR_WSTRLIST

}

int

_PyCoreConfig_Copy(_PyCoreConfig *config, const _PyCoreConfig *config2)

{

_PyCoreConfig_Clear(config);

#define COPY_ATTR(ATTR) config->ATTR = config2->ATTR

#define COPY_STR_ATTR(ATTR) \

do { \

if (config2->ATTR != NULL) { \

config->ATTR = _PyMem_RawWcsdup(config2->ATTR); \

if (config->ATTR == NULL) { \

return -1; \

} \

} \

} while (0)

#define COPY_WSTRLIST(LEN, LIST) \

do { \

if (config2->LIST != NULL) { \

config->LIST = _Py_wstrlist_copy(config2->LEN, config2->LIST); \

if (config->LIST == NULL) { \

return -1; \

} \

} \

config->LEN = config2->LEN; \

} while (0)

COPY_ATTR(install_signal_handlers);

COPY_ATTR(use_environment);

COPY_ATTR(use_hash_seed);

COPY_ATTR(hash_seed);

COPY_ATTR(_install_importlib);

COPY_ATTR(allocator);

COPY_ATTR(dev_mode);

COPY_ATTR(faulthandler);

COPY_ATTR(tracemalloc);

COPY_ATTR(import_time);

COPY_ATTR(show_ref_count);

COPY_ATTR(show_alloc_count);

COPY_ATTR(dump_refs);

COPY_ATTR(malloc_stats);

COPY_ATTR(coerce_c_locale);

COPY_ATTR(coerce_c_locale_warn);

COPY_ATTR(utf8_mode);

COPY_STR_ATTR(pycache_prefix);

COPY_STR_ATTR(module_search_path_env);

COPY_STR_ATTR(home);

COPY_STR_ATTR(program_name);

COPY_STR_ATTR(program);

COPY_WSTRLIST(argc, argv);

COPY_WSTRLIST(nwarnoption, warnoptions);

COPY_WSTRLIST(nxoption, xoptions);

COPY_WSTRLIST(nmodule_search_path, module_search_paths);

COPY_STR_ATTR(executable);

COPY_STR_ATTR(prefix);

COPY_STR_ATTR(base_prefix);

COPY_STR_ATTR(exec_prefix);

#ifdef MS_WINDOWS

COPY_STR_ATTR(dll_path);

#endif

COPY_STR_ATTR(base_exec_prefix);

COPY_ATTR(isolated);

COPY_ATTR(site_import);

COPY_ATTR(bytes_warning);

COPY_ATTR(inspect);

COPY_ATTR(interactive);

COPY_ATTR(optimization_level);

COPY_ATTR(parser_debug);

COPY_ATTR(write_bytecode);

COPY_ATTR(verbose);

COPY_ATTR(quiet);

COPY_ATTR(user_site_directory);

COPY_ATTR(buffered_stdio);

#ifdef MS_WINDOWS

COPY_ATTR(legacy_windows_fs_encoding);

COPY_ATTR(legacy_windows_stdio);

#endif

COPY_ATTR(_check_hash_pycs_mode);

COPY_ATTR(_frozen);

#undef COPY_ATTR

#undef COPY_STR_ATTR

#undef COPY_WSTRLIST

return 0;

}

const char*

_PyCoreConfig_GetEnv(const _PyCoreConfig *config, const char *name)

{

assert(config->use_environment >= 0);

if (!config->use_environment) {

return NULL;

}

const char *var = getenv(name);

if (var && var[0] != '\0') {

return var;

}

else {

return NULL;

}

}

int

_PyCoreConfig_GetEnvDup(const _PyCoreConfig *config,

wchar_t **dest,

wchar_t *wname, char *name)

{

assert(config->use_environment >= 0);

if (!config->use_environment) {

*dest = NULL;

return 0;

}

#ifdef MS_WINDOWS

const wchar_t *var = _wgetenv(wname);

if (!var || var[0] == '\0') {

*dest = NULL;

return 0;

}

wchar_t *copy = _PyMem_RawWcsdup(var);

if (copy == NULL) {

return -1;

}

*dest = copy;

#else

const char *var = getenv(name);

if (!var || var[0] == '\0') {

*dest = NULL;

return 0;

}

size_t len;

wchar_t *wvar = Py_DecodeLocale(var, &len);

if (!wvar) {

if (len == (size_t)-2) {

return -2;

}

else {

return -1;

}

}

*dest = wvar;

#endif

return 0;

}

void

_PyCoreConfig_GetGlobalConfig(_PyCoreConfig *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(utf8_mode, Py_UTF8Mode);

COPY_FLAG(isolated, Py_IsolatedFlag);

COPY_FLAG(bytes_warning, Py_BytesWarningFlag);

COPY_FLAG(inspect, Py_InspectFlag);

COPY_FLAG(interactive, Py_InteractiveFlag);

COPY_FLAG(optimization_level, Py_OptimizeFlag);

COPY_FLAG(parser_debug, Py_DebugFlag);

COPY_FLAG(verbose, Py_VerboseFlag);

COPY_FLAG(quiet, Py_QuietFlag);

#ifdef MS_WINDOWS

COPY_FLAG(legacy_windows_fs_encoding, Py_LegacyWindowsFSEncodingFlag);

COPY_FLAG(legacy_windows_stdio, Py_LegacyWindowsStdioFlag);

#endif

COPY_FLAG(_frozen, Py_FrozenFlag);

COPY_NOT_FLAG(use_environment, Py_IgnoreEnvironmentFlag);

COPY_NOT_FLAG(buffered_stdio, Py_UnbufferedStdioFlag);

COPY_NOT_FLAG(site_import, Py_NoSiteFlag);

COPY_NOT_FLAG(write_bytecode, Py_DontWriteBytecodeFlag);

COPY_NOT_FLAG(user_site_directory, Py_NoUserSiteDirectory);

#undef COPY_FLAG

#undef COPY_NOT_FLAG

}

/* Set Py_xxx global configuration variables from 'config' configuration. */

void

_PyCoreConfig_SetGlobalConfig(const _PyCoreConfig *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(utf8_mode, Py_UTF8Mode);

COPY_FLAG(isolated, Py_IsolatedFlag);

COPY_FLAG(bytes_warning, Py_BytesWarningFlag);

COPY_FLAG(inspect, Py_InspectFlag);

COPY_FLAG(interactive, Py_InteractiveFlag);

COPY_FLAG(optimization_level, Py_OptimizeFlag);

COPY_FLAG(parser_debug, Py_DebugFlag);

COPY_FLAG(verbose, Py_VerboseFlag);

COPY_FLAG(quiet, Py_QuietFlag);

#ifdef MS_WINDOWS

COPY_FLAG(legacy_windows_fs_encoding, Py_LegacyWindowsFSEncodingFlag);

COPY_FLAG(legacy_windows_stdio, Py_LegacyWindowsStdioFlag);

#endif

COPY_NOT_FLAG(use_environment, Py_IgnoreEnvironmentFlag);

COPY_NOT_FLAG(buffered_stdio, Py_UnbufferedStdioFlag);

COPY_NOT_FLAG(site_import, Py_NoSiteFlag);

COPY_NOT_FLAG(write_bytecode, Py_DontWriteBytecodeFlag);

COPY_NOT_FLAG(user_site_directory, Py_NoUserSiteDirectory);

/* Random or non-zero hash seed */

Py_HashRandomizationFlag = (config->use_hash_seed == 0 ||

config->hash_seed != 0);

#undef COPY_FLAG

#undef COPY_NOT_FLAG

}

/* Get the program name: use PYTHONEXECUTABLE and __PYVENV_LAUNCHER__

environment variables on macOS if available. */

static _PyInitError

config_init_program_name(_PyCoreConfig *config)

{

assert(config->program_name == NULL);

/* If Py_SetProgramName() was called, use its value */

const wchar_t *program_name = _Py_path_config.program_name;

if (program_name != NULL) {

config->program_name = _PyMem_RawWcsdup(program_name);

if (config->program_name == NULL) {

return _Py_INIT_NO_MEMORY();

}

return _Py_INIT_OK();

}

#ifdef __APPLE__

/* On MacOS X, when the Python interpreter is embedded in an

application bundle, it gets executed by a bootstrapping script

that does os.execve() with an argv[0] that's different from the

actual Python executable. This is needed to keep the Finder happy,

or rather, to work around Apple's overly strict requirements of

the process name. However, we still need a usable sys.executable,

so the actual executable path is passed in an environment variable.

See Lib/plat-mac/bundlebuiler.py for details about the bootstrap

script. */

const char *p = _PyCoreConfig_GetEnv(config, "PYTHONEXECUTABLE");

if (p != NULL) {

size_t len;

wchar_t* program_name = Py_DecodeLocale(p, &len);

if (program_name == NULL) {

return DECODE_LOCALE_ERR("PYTHONEXECUTABLE environment "

"variable", (Py_ssize_t)len);

}

config->program_name = program_name;

return _Py_INIT_OK();

}

#ifdef WITH_NEXT_FRAMEWORK

else {

const char* pyvenv_launcher = getenv("__PYVENV_LAUNCHER__");

if (pyvenv_launcher && *pyvenv_launcher) {

/* Used by Mac/Tools/pythonw.c to forward

* the argv0 of the stub executable

*/

size_t len;

wchar_t* program_name = Py_DecodeLocale(pyvenv_launcher, &len);

if (program_name == NULL) {

return DECODE_LOCALE_ERR("__PYVENV_LAUNCHER__ environment "

"variable", (Py_ssize_t)len);

}

config->program_name = program_name;

return _Py_INIT_OK();

}

}

#endif /* WITH_NEXT_FRAMEWORK */

#endif /* __APPLE__ */

/* Use argv[0] by default, if available */

if (config->program != NULL) {

config->program_name = _PyMem_RawWcsdup(config->program);

if (config->program_name == NULL) {

return _Py_INIT_NO_MEMORY();

}

return _Py_INIT_OK();

}

/* Last fall back: hardcoded string */

#ifdef MS_WINDOWS

const wchar_t *default_program_name = L"python";

#else

const wchar_t *default_program_name = L"python3";

#endif

config->program_name = _PyMem_RawWcsdup(default_program_name);

if (config->program_name == NULL) {

return _Py_INIT_NO_MEMORY();

}

return _Py_INIT_OK();

}

static const wchar_t*

config_get_xoption(const _PyCoreConfig *config, wchar_t *name)

{

int nxoption = config->nxoption;

wchar_t **xoptions = config->xoptions;

for (int i=0; i < nxoption; i++) {

wchar_t *option = xoptions[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

config_init_home(_PyCoreConfig *config)

{

wchar_t *home;

/* If Py_SetPythonHome() was called, use its value */

home = _Py_path_config.home;

if (home) {

config->home = _PyMem_RawWcsdup(home);

if (config->home == NULL) {

return _Py_INIT_NO_MEMORY();

}

return _Py_INIT_OK();

}

int res = _PyCoreConfig_GetEnvDup(config, &home,

L"PYTHONHOME", "PYTHONHOME");

if (res < 0) {

return DECODE_LOCALE_ERR("PYTHONHOME", res);

}

config->home = home;

return _Py_INIT_OK();

}

static _PyInitError

config_init_hash_seed(_PyCoreConfig *config)

{

const char *seed_text = _PyCoreConfig_GetEnv(config, "PYTHONHASHSEED");

Py_BUILD_ASSERT(sizeof(_Py_HashSecret_t) == sizeof(_Py_HashSecret.uc));

/* Convert a text seed to a numeric one */

if (seed_text && strcmp(seed_text, "random") != 0) {

const char *endptr = seed_text;

unsigned long seed;

errno = 0;

seed = strtoul(seed_text, (char **)&endptr, 10);

if (*endptr != '\0'

|| seed > 4294967295UL

|| (errno == ERANGE && seed == ULONG_MAX))

{

return _Py_INIT_USER_ERR("PYTHONHASHSEED must be \"random\" "

"or an integer in range [0; 4294967295]");

}

/* Use a specific hash */

config->use_hash_seed = 1;

config->hash_seed = seed;

}

else {

/* Use a random hash */

config->use_hash_seed = 0;

config->hash_seed = 0;

}

return _Py_INIT_OK();

}

static _PyInitError

config_init_utf8_mode(_PyCoreConfig *config)

{

const wchar_t *xopt = config_get_xoption(config, L"utf8");

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 = _PyCoreConfig_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 int

config_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;

}

static int

config_wstr_to_int(const wchar_t *wstr, int *result)

{

const wchar_t *endptr = wstr;

errno = 0;

long value = wcstol(wstr, (wchar_t **)&endptr, 10);

if (*endptr != '\0' || errno == ERANGE) {

return -1;

}

if (value < INT_MIN || value > INT_MAX) {

return -1;

}

*result = (int)value;

return 0;

}

static void

get_env_flag(_PyCoreConfig *config, int *flag, const char *name)

{

const char *var = _PyCoreConfig_GetEnv(config, name);

if (!var) {

return;

}

int value;

if (config_str_to_int(var, &value) < 0 || value < 0) {

/* PYTHONDEBUG=text and PYTHONDEBUG=-2 behave as PYTHONDEBUG=1 */

value = 1;

}

if (*flag < value) {

*flag = value;

}

}

static _PyInitError

config_read_env_vars(_PyCoreConfig *config)

{

assert(config->use_environment > 0);

/* Get environment variables */

get_env_flag(config, &config->parser_debug, "PYTHONDEBUG");

get_env_flag(config, &config->verbose, "PYTHONVERBOSE");

get_env_flag(config, &config->optimization_level, "PYTHONOPTIMIZE");

get_env_flag(config, &config->inspect, "PYTHONINSPECT");

int dont_write_bytecode = 0;

get_env_flag(config, &dont_write_bytecode, "PYTHONDONTWRITEBYTECODE");

if (dont_write_bytecode) {

config->write_bytecode = 0;

}

int no_user_site_directory = 0;

get_env_flag(config, &no_user_site_directory, "PYTHONNOUSERSITE");

if (no_user_site_directory) {

config->user_site_directory = 0;

}

int unbuffered_stdio = 0;

get_env_flag(config, &unbuffered_stdio, "PYTHONUNBUFFERED");

if (unbuffered_stdio) {

config->buffered_stdio = 0;

}

#ifdef MS_WINDOWS

get_env_flag(config, &config->legacy_windows_fs_encoding,

"PYTHONLEGACYWINDOWSFSENCODING");

get_env_flag(config, &config->legacy_windows_stdio,

"PYTHONLEGACYWINDOWSSTDIO");

#endif

if (config->allocator == NULL) {

config->allocator = _PyCoreConfig_GetEnv(config, "PYTHONMALLOC");

}

if (_PyCoreConfig_GetEnv(config, "PYTHONDUMPREFS")) {

config->dump_refs = 1;

}

if (_PyCoreConfig_GetEnv(config, "PYTHONMALLOCSTATS")) {

config->malloc_stats = 1;

}

if (config->coerce_c_locale < 0) {

const char *env = _PyCoreConfig_GetEnv(config, "PYTHONCOERCECLOCALE");

if (env) {

if (strcmp(env, "0") == 0) {

config->coerce_c_locale = 0;

}

else if (strcmp(env, "warn") == 0) {

config->coerce_c_locale_warn = 1;

}

else {

config->coerce_c_locale = 1;

}

}

}

wchar_t *path;

int res = _PyCoreConfig_GetEnvDup(config, &path,

L"PYTHONPATH", "PYTHONPATH");

if (res < 0) {

return DECODE_LOCALE_ERR("PYTHONPATH", res);

}

config->module_search_path_env = path;

if (config->use_hash_seed < 0) {

_PyInitError err = config_init_hash_seed(config);

if (_Py_INIT_FAILED(err)) {

return err;

}

}

return _Py_INIT_OK();

}

static _PyInitError

config_init_tracemalloc(_PyCoreConfig *config)

{

int nframe;

int valid;

const char *env = _PyCoreConfig_GetEnv(config, "PYTHONTRACEMALLOC");

if (env) {

if (!config_str_to_int(env, &nframe)) {

valid = (nframe >= 0);

}

else {

valid = 0;

}

if (!valid) {

return _Py_INIT_USER_ERR("PYTHONTRACEMALLOC: invalid number "

"of frames");

}

config->tracemalloc = nframe;

}

const wchar_t *xoption = config_get_xoption(config, L"tracemalloc");

if (xoption) {

const wchar_t *sep = wcschr(xoption, L'=');

if (sep) {

if (!config_wstr_to_int(sep + 1, &nframe)) {

valid = (nframe >= 0);

}

else {

valid = 0;

}

if (!valid) {

return _Py_INIT_USER_ERR("-X tracemalloc=NFRAME: "

"invalid number of frames");

}

}

else {

/* -X tracemalloc behaves as -X tracemalloc=1 */

nframe = 1;

}

config->tracemalloc = nframe;

}

return _Py_INIT_OK();

}

static _PyInitError

config_init_pycache_prefix(_PyCoreConfig *config)

{

assert(config->pycache_prefix == NULL);

const wchar_t *xoption = config_get_xoption(config, L"pycache_prefix");

if (xoption) {

const wchar_t *sep = wcschr(xoption, L'=');

if (sep && wcslen(sep) > 1) {

config->pycache_prefix = _PyMem_RawWcsdup(sep + 1);

if (config->pycache_prefix == NULL) {

return _Py_INIT_NO_MEMORY();

}

}

else {

// -X pycache_prefix= can cancel the env var

config->pycache_prefix = NULL;

}

}

else {

wchar_t *env;

int res = _PyCoreConfig_GetEnvDup(config, &env,

L"PYTHONPYCACHEPREFIX",

"PYTHONPYCACHEPREFIX");

if (res < 0) {

return DECODE_LOCALE_ERR("PYTHONPYCACHEPREFIX", res);

}

if (env) {

config->pycache_prefix = env;

}

}

return _Py_INIT_OK();

}

static _PyInitError

config_read_complex_options(_PyCoreConfig *config)

{

/* More complex options configured by env var and -X option */

if (config->faulthandler < 0) {

if (_PyCoreConfig_GetEnv(config, "PYTHONFAULTHANDLER")

|| config_get_xoption(config, L"faulthandler")) {

config->faulthandler = 1;

}

}

if (_PyCoreConfig_GetEnv(config, "PYTHONPROFILEIMPORTTIME")

|| config_get_xoption(config, L"importtime")) {

config->import_time = 1;

}

if (config_get_xoption(config, L"dev" ) ||

_PyCoreConfig_GetEnv(config, "PYTHONDEVMODE"))

{

config->dev_mode = 1;

}

_PyInitError err;

if (config->tracemalloc < 0) {

err = config_init_tracemalloc(config);

if (_Py_INIT_FAILED(err)) {

return err;

}

}

if (config->pycache_prefix == NULL) {

err = config_init_pycache_prefix(config);

if (_Py_INIT_FAILED(err)) {

return err;

}

}

return _Py_INIT_OK();

}

static void

config_init_locale(_PyCoreConfig *config)

{

if (config->coerce_c_locale < 0) {

/* The C locale enables the C locale coercion (PEP 538) */

if (_Py_LegacyLocaleDetected()) {

config->coerce_c_locale = 1;

}

}

#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

}

/* Read configuration settings from standard locations

*

* This function doesn't make any changes to the interpreter state - it

* merely populates any missing configuration settings. This allows an

* embedding application to completely override a config option by

* setting it before calling this function, or else modify the default

* setting before passing the fully populated config to Py_EndInitialization.

*

* More advanced selective initialization tricks are possible by calling

* this function multiple times with various preconfigured settings.

*/

_PyInitError

_PyCoreConfig_Read(_PyCoreConfig *config)

{

_PyInitError err;

_PyCoreConfig_GetGlobalConfig(config);

if (config->isolated > 0) {

config->use_environment = 0;

config->user_site_directory = 0;

}

#ifdef MS_WINDOWS

if (config->legacy_windows_fs_encoding) {

config->utf8_mode = 0;

}

#endif

assert(config->use_environment >= 0);

if (config->use_environment) {

err = config_read_env_vars(config);

if (_Py_INIT_FAILED(err)) {

return err;

}

}

/* -X options */

if (config_get_xoption(config, L"showrefcount")) {

config->show_ref_count = 1;

}

if (config_get_xoption(config, L"showalloccount")) {

config->show_alloc_count = 1;

}

err = config_read_complex_options(config);

if (_Py_INIT_FAILED(err)) {

return err;

}

if (config->utf8_mode < 0) {

err = config_init_utf8_mode(config);

if (_Py_INIT_FAILED(err)) {

return err;

}

}

if (config->home == NULL) {

err = config_init_home(config);

if (_Py_INIT_FAILED(err)) {

return err;

}

}

if (config->program_name == NULL) {

err = config_init_program_name(config);

if (_Py_INIT_FAILED(err)) {

return err;

}

}

if (config->utf8_mode < 0 || config->coerce_c_locale < 0) {

config_init_locale(config);

}

if (config->_install_importlib) {

err = _PyCoreConfig_InitPathConfig(config);

if (_Py_INIT_FAILED(err)) {

return err;

}

}

/* default values */

if (config->dev_mode) {

if (config->faulthandler < 0) {

config->faulthandler = 1;

}

if (config->allocator == NULL) {

config->allocator = "debug";

}

}

if (config->use_hash_seed < 0) {

config->use_hash_seed = 0;

config->hash_seed = 0;

}

if (config->faulthandler < 0) {

config->faulthandler = 0;

}

if (config->tracemalloc < 0) {

config->tracemalloc = 0;

}

if (config->coerce_c_locale < 0) {

config->coerce_c_locale = 0;

}

if (config->utf8_mode < 0) {

config->utf8_mode = 0;

}

if (config->_frozen < 0) {

config->_frozen = 0;

}

if (config->argc < 0) {

config->argc = 0;

}

return _Py_INIT_OK();

}