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coreconfig.c
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#include "Python.h"
#include "osdefs.h" /* DELIM */
#include "pycore_coreconfig.h"
#include "pycore_fileutils.h"
#include "pycore_getopt.h"
#include "pycore_pylifecycle.h"
#include "pycore_pymem.h"
#include "pycore_pathconfig.h"
#include <locale.h> /* setlocale() */
#ifdef HAVE_LANGINFO_H
# include <langinfo.h> /* nl_langinfo(CODESET) */
#endif
#if defined(MS_WINDOWS) || defined(__CYGWIN__)
# include <windows.h> /* GetACP() */
# ifdef HAVE_IO_H
# include <io.h>
# endif
# ifdef HAVE_FCNTL_H
# include <fcntl.h> /* O_BINARY */
# endif
#endif
/* --- Command line options --------------------------------------- */
/* Short usage message (with %s for argv0) */
static const char usage_line[] =
"usage: %ls [option] ... [-c cmd | -m mod | file | -] [arg] ...\n";
/* Long usage message, split into parts < 512 bytes */
static const char usage_1[] = "\
Options and arguments (and corresponding environment variables):\n\
-b : issue warnings about str(bytes_instance), str(bytearray_instance)\n\
and comparing bytes/bytearray with str. (-bb: issue errors)\n\
-B : don't write .pyc files on import; also PYTHONDONTWRITEBYTECODE=x\n\
-c cmd : program passed in as string (terminates option list)\n\
-d : debug output from parser; also PYTHONDEBUG=x\n\
-E : ignore PYTHON* environment variables (such as PYTHONPATH)\n\
-h : print this help message and exit (also --help)\n\
";
static const char usage_2[] = "\
-i : inspect interactively after running script; forces a prompt even\n\
if stdin does not appear to be a terminal; also PYTHONINSPECT=x\n\
-I : isolate Python from the user's environment (implies -E and -s)\n\
-m mod : run library module as a script (terminates option list)\n\
-O : remove assert and __debug__-dependent statements; add .opt-1 before\n\
.pyc extension; also PYTHONOPTIMIZE=x\n\
-OO : do -O changes and also discard docstrings; add .opt-2 before\n\
.pyc extension\n\
-q : don't print version and copyright messages on interactive startup\n\
-s : don't add user site directory to sys.path; also PYTHONNOUSERSITE\n\
-S : don't imply 'import site' on initialization\n\
";
static const char usage_3[] = "\
-u : force the stdout and stderr streams to be unbuffered;\n\
this option has no effect on stdin; also PYTHONUNBUFFERED=x\n\
-v : verbose (trace import statements); also PYTHONVERBOSE=x\n\
can be supplied multiple times to increase verbosity\n\
-V : print the Python version number and exit (also --version)\n\
when given twice, print more information about the build\n\
-W arg : warning control; arg is action:message:category:module:lineno\n\
also PYTHONWARNINGS=arg\n\
-x : skip first line of source, allowing use of non-Unix forms of #!cmd\n\
-X opt : set implementation-specific option\n\
--check-hash-based-pycs always|default|never:\n\
control how Python invalidates hash-based .pyc files\n\
";
static const char usage_4[] = "\
file : program read from script file\n\
- : program read from stdin (default; interactive mode if a tty)\n\
arg ...: arguments passed to program in sys.argv[1:]\n\n\
Other environment variables:\n\
PYTHONSTARTUP: file executed on interactive startup (no default)\n\
PYTHONPATH : '%lc'-separated list of directories prefixed to the\n\
default module search path. The result is sys.path.\n\
";
static const char usage_5[] =
"PYTHONHOME : alternate <prefix> directory (or <prefix>%lc<exec_prefix>).\n"
" The default module search path uses %s.\n"
"PYTHONCASEOK : ignore case in 'import' statements (Windows).\n"
"PYTHONIOENCODING: Encoding[:errors] used for stdin/stdout/stderr.\n"
"PYTHONFAULTHANDLER: dump the Python traceback on fatal errors.\n";
static const char usage_6[] =
"PYTHONHASHSEED: if this variable is set to 'random', a random value is used\n"
" to seed the hashes of str, bytes and datetime objects. It can also be\n"
" set to an integer in the range [0,4294967295] to get hash values with a\n"
" predictable seed.\n"
"PYTHONMALLOC: set the Python memory allocators and/or install debug hooks\n"
" on Python memory allocators. Use PYTHONMALLOC=debug to install debug\n"
" hooks.\n"
"PYTHONCOERCECLOCALE: if this variable is set to 0, it disables the locale\n"
" coercion behavior. Use PYTHONCOERCECLOCALE=warn to request display of\n"
" locale coercion and locale compatibility warnings on stderr.\n"
"PYTHONBREAKPOINT: if this variable is set to 0, it disables the default\n"
" debugger. It can be set to the callable of your debugger of choice.\n"
"PYTHONDEVMODE: enable the development mode.\n"
"PYTHONPYCACHEPREFIX: root directory for bytecode cache (pyc) files.\n";
#if defined(MS_WINDOWS)
# define PYTHONHOMEHELP "<prefix>\\python{major}{minor}"
#else
# define PYTHONHOMEHELP "<prefix>/lib/pythonX.X"
#endif
/* --- Global configuration variables ----------------------------- */
/* 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
PyObject *
_Py_GetGlobalVariablesAsDict(void)
{
PyObject *dict, *obj;
dict = PyDict_New();
if (dict == NULL) {
return NULL;
}
#define SET_ITEM(KEY, EXPR) \
do { \
obj = (EXPR); \
if (obj == NULL) { \
return NULL; \
} \
int res = PyDict_SetItemString(dict, (KEY), obj); \
Py_DECREF(obj); \
if (res < 0) { \
goto fail; \
} \
} while (0)
#define SET_ITEM_INT(VAR) \
SET_ITEM(#VAR, PyLong_FromLong(VAR))
#define FROM_STRING(STR) \
((STR != NULL) ? \
PyUnicode_FromString(STR) \
: (Py_INCREF(Py_None), Py_None))
#define SET_ITEM_STR(VAR) \
SET_ITEM(#VAR, FROM_STRING(VAR))
SET_ITEM_STR(Py_FileSystemDefaultEncoding);
SET_ITEM_INT(Py_HasFileSystemDefaultEncoding);
SET_ITEM_STR(Py_FileSystemDefaultEncodeErrors);
SET_ITEM_INT(_Py_HasFileSystemDefaultEncodeErrors);
SET_ITEM_INT(Py_UTF8Mode);
SET_ITEM_INT(Py_DebugFlag);
SET_ITEM_INT(Py_VerboseFlag);
SET_ITEM_INT(Py_QuietFlag);
SET_ITEM_INT(Py_InteractiveFlag);
SET_ITEM_INT(Py_InspectFlag);
SET_ITEM_INT(Py_OptimizeFlag);
SET_ITEM_INT(Py_NoSiteFlag);
SET_ITEM_INT(Py_BytesWarningFlag);
SET_ITEM_INT(Py_FrozenFlag);
SET_ITEM_INT(Py_IgnoreEnvironmentFlag);
SET_ITEM_INT(Py_DontWriteBytecodeFlag);
SET_ITEM_INT(Py_NoUserSiteDirectory);
SET_ITEM_INT(Py_UnbufferedStdioFlag);
SET_ITEM_INT(Py_HashRandomizationFlag);
SET_ITEM_INT(Py_IsolatedFlag);
#ifdef MS_WINDOWS
SET_ITEM_INT(Py_LegacyWindowsFSEncodingFlag);
SET_ITEM_INT(Py_LegacyWindowsStdioFlag);
#endif
return dict;
fail:
Py_DECREF(dict);
return NULL;
#undef FROM_STRING
#undef SET_ITEM
#undef SET_ITEM_INT
#undef SET_ITEM_STR
}
/* --- _Py_wstrlist ----------------------------------------------- */
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 * const *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;
}
_PyInitError
_Py_wstrlist_append(int *len, wchar_t ***list, const wchar_t *str)
{
if (*len == INT_MAX) {
/* len+1 would overflow */
return _Py_INIT_NO_MEMORY();
}
wchar_t *str2 = _PyMem_RawWcsdup(str);
if (str2 == NULL) {
return _Py_INIT_NO_MEMORY();
}
size_t size = (*len + 1) * sizeof(list[0]);
wchar_t **list2 = (wchar_t **)PyMem_RawRealloc(*list, size);
if (list2 == NULL) {
PyMem_RawFree(str2);
return _Py_INIT_NO_MEMORY();
}
list2[*len] = str2;
*list = list2;
(*len)++;
return _Py_INIT_OK();
}
PyObject*
_Py_wstrlist_as_pylist(int len, wchar_t **list)
{
assert(list != NULL || len < 1);
PyObject *pylist = PyList_New(len);
if (pylist == NULL) {
return NULL;
}
for (int i = 0; i < len; i++) {
PyObject *v = PyUnicode_FromWideChar(list[i], -1);
if (v == NULL) {
Py_DECREF(pylist);
return NULL;
}
PyList_SET_ITEM(pylist, i, v);
}
return pylist;
}
/* --- Py_SetStandardStreamEncoding() ----------------------------- */
/* Helper to allow an embedding application to override the normal
* mechanism that attempts to figure out an appropriate IO encoding
*/
static char *_Py_StandardStreamEncoding = NULL;
static char *_Py_StandardStreamErrors = NULL;
int
Py_SetStandardStreamEncoding(const char *encoding, const char *errors)
{
if (Py_IsInitialized()) {
/* This is too late to have any effect */
return -1;
}
int res = 0;
/* Py_SetStandardStreamEncoding() can be called before Py_Initialize(),
but Py_Initialize() can change the allocator. Use a known allocator
to be able to release the memory later. */
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
/* Can't call PyErr_NoMemory() on errors, as Python hasn't been
* initialised yet.
*
* However, the raw memory allocators are initialised appropriately
* as C static variables, so _PyMem_RawStrdup is OK even though
* Py_Initialize hasn't been called yet.
*/
if (encoding) {
_Py_StandardStreamEncoding = _PyMem_RawStrdup(encoding);
if (!_Py_StandardStreamEncoding) {
res = -2;
goto done;
}
}
if (errors) {
_Py_StandardStreamErrors = _PyMem_RawStrdup(errors);
if (!_Py_StandardStreamErrors) {
if (_Py_StandardStreamEncoding) {
PyMem_RawFree(_Py_StandardStreamEncoding);
}
res = -3;
goto done;
}
}
#ifdef MS_WINDOWS
if (_Py_StandardStreamEncoding) {
/* Overriding the stream encoding implies legacy streams */
Py_LegacyWindowsStdioFlag = 1;
}
#endif
done:
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
return res;
}
void
_Py_ClearStandardStreamEncoding(void)
{
/* Use the same allocator than Py_SetStandardStreamEncoding() */
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
/* We won't need them anymore. */
if (_Py_StandardStreamEncoding) {
PyMem_RawFree(_Py_StandardStreamEncoding);
_Py_StandardStreamEncoding = NULL;
}
if (_Py_StandardStreamErrors) {
PyMem_RawFree(_Py_StandardStreamErrors);
_Py_StandardStreamErrors = NULL;
}
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
}
/* --- Py_GetArgcArgv() ------------------------------------------- */
/* For Py_GetArgcArgv(); set by _Py_SetArgcArgv() */
static int orig_argc = 0;
static wchar_t **orig_argv = NULL;
void
_Py_ClearArgcArgv(void)
{
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
_Py_wstrlist_clear(orig_argc, orig_argv);
orig_argc = 0;
orig_argv = NULL;
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
}
int
_Py_SetArgcArgv(int argc, wchar_t * const *argv)
{
int res;
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
wchar_t **argv_copy = _Py_wstrlist_copy(argc, argv);
if (argv_copy != NULL) {
_Py_ClearArgcArgv();
orig_argc = argc;
orig_argv = argv_copy;
res = 0;
}
else {
res = -1;
}
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
return res;
}
/* Make the *original* argc/argv available to other modules.
This is rare, but it is needed by the secureware extension. */
void
Py_GetArgcArgv(int *argc, wchar_t ***argv)
{
*argc = orig_argc;
*argv = orig_argv;
}
/* --- _PyCoreConfig ---------------------------------------------- */
#define DECODE_LOCALE_ERR(NAME, LEN) \
(((LEN) == -2) \
? _Py_INIT_USER_ERR("cannot decode " NAME) \
: _Py_INIT_NO_MEMORY())
/* Free memory allocated in config, but don't clear all attributes */
void
_PyCoreConfig_Clear(_PyCoreConfig *config)
{
_PyPreConfig_Clear(&config->preconfig);
#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);
CLEAR(config->filesystem_encoding);
CLEAR(config->filesystem_errors);
CLEAR(config->stdio_encoding);
CLEAR(config->stdio_errors);
#undef CLEAR
#undef CLEAR_WSTRLIST
}
int
_PyCoreConfig_Copy(_PyCoreConfig *config, const _PyCoreConfig *config2)
{
_PyCoreConfig_Clear(config);
if (_PyPreConfig_Copy(&config->preconfig, &config2->preconfig) < 0) {
return -1;
}
#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)
#define COPY_WSTR_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_hash_seed);
COPY_ATTR(hash_seed);
COPY_ATTR(_install_importlib);
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_WSTR_ATTR(pycache_prefix);
COPY_WSTR_ATTR(module_search_path_env);
COPY_WSTR_ATTR(home);
COPY_WSTR_ATTR(program_name);
COPY_WSTR_ATTR(program);
COPY_WSTRLIST(argc, argv);
COPY_WSTRLIST(nwarnoption, warnoptions);
COPY_WSTRLIST(nxoption, xoptions);
COPY_WSTRLIST(nmodule_search_path, module_search_paths);
COPY_WSTR_ATTR(executable);
COPY_WSTR_ATTR(prefix);
COPY_WSTR_ATTR(base_prefix);
COPY_WSTR_ATTR(exec_prefix);
#ifdef MS_WINDOWS
COPY_WSTR_ATTR(dll_path);
#endif
COPY_WSTR_ATTR(base_exec_prefix);
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);
COPY_STR_ATTR(filesystem_encoding);
COPY_STR_ATTR(filesystem_errors);
COPY_STR_ATTR(stdio_encoding);
COPY_STR_ATTR(stdio_errors);
#ifdef MS_WINDOWS
COPY_ATTR(legacy_windows_stdio);
#endif
COPY_ATTR(skip_source_first_line);
COPY_WSTR_ATTR(run_command);
COPY_WSTR_ATTR(run_module);
COPY_WSTR_ATTR(run_filename);
COPY_ATTR(_check_hash_pycs_mode);
COPY_ATTR(_frozen);
#undef COPY_ATTR
#undef COPY_STR_ATTR
#undef COPY_WSTR_ATTR
#undef COPY_WSTRLIST
return 0;
}
const char*
_PyCoreConfig_GetEnv(const _PyCoreConfig *config, const char *name)
{
return _PyPreConfig_GetEnv(&config->preconfig, name);
}
int
_PyCoreConfig_GetEnvDup(const _PyCoreConfig *config,
wchar_t **dest,
wchar_t *wname, char *name)
{
assert(config->preconfig.use_environment >= 0);
if (!config->preconfig.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)
{
_PyPreConfig_GetGlobalConfig(&config->preconfig);
#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(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_stdio, Py_LegacyWindowsStdioFlag);
#endif
COPY_FLAG(_frozen, Py_FrozenFlag);
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)
{
_PyPreConfig_SetGlobalConfig(&config->preconfig);
#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(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_stdio, Py_LegacyWindowsStdioFlag);
#endif
COPY_FLAG(_frozen, Py_FrozenFlag);
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 _PyInitError
config_init_executable(_PyCoreConfig *config)
{
assert(config->executable == NULL);
/* If Py_SetProgramFullPath() was called, use its value */
const wchar_t *program_full_path = _Py_path_config.program_full_path;
if (program_full_path != NULL) {
config->executable = _PyMem_RawWcsdup(program_full_path);
if (config->executable == NULL) {
return _Py_INIT_NO_MEMORY();
}
return _Py_INIT_OK();
}
return _Py_INIT_OK();
}
static const wchar_t*
config_get_xoption(const _PyCoreConfig *config, wchar_t *name)
{
return _Py_get_xoption(config->nxoption, config->xoptions, name);
}
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 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 _PyInitError
config_read_env_vars(_PyCoreConfig *config)
{
#define get_env_flag(CONFIG, ATTR, NAME) \
_Py_get_env_flag(&(CONFIG)->preconfig, (ATTR), (NAME))
/* 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_stdio,
"PYTHONLEGACYWINDOWSSTDIO");
#endif
if (_PyCoreConfig_GetEnv(config, "PYTHONDUMPREFS")) {
config->dump_refs = 1;
}
if (_PyCoreConfig_GetEnv(config, "PYTHONMALLOCSTATS")) {
config->malloc_stats = 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();
#undef get_env_flag
}
static _PyInitError
config_init_tracemalloc(_PyCoreConfig *config)
{
int nframe;
int valid;
const char *env = _PyCoreConfig_GetEnv(config, "PYTHONTRACEMALLOC");
if (env) {
if (!_Py_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;