| /* Path configuration like module_search_path (sys.path) */ |
| |
| #include "Python.h" |
| #include "osdefs.h" |
| #include "internal/pystate.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| |
| _PyPathConfig _Py_path_config = _PyPathConfig_INIT; |
| |
| |
| void |
| _PyPathConfig_Clear(_PyPathConfig *config) |
| { |
| /* _PyMem_SetDefaultAllocator() is needed to get a known memory allocator, |
| since Py_SetPath(), Py_SetPythonHome() and Py_SetProgramName() can be |
| called before Py_Initialize() which can changes the memory allocator. */ |
| PyMemAllocatorEx old_alloc; |
| _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| |
| #define CLEAR(ATTR) \ |
| do { \ |
| PyMem_RawFree(ATTR); \ |
| ATTR = NULL; \ |
| } while (0) |
| |
| CLEAR(config->prefix); |
| CLEAR(config->program_full_path); |
| #ifdef MS_WINDOWS |
| CLEAR(config->dll_path); |
| #else |
| CLEAR(config->exec_prefix); |
| #endif |
| CLEAR(config->module_search_path); |
| CLEAR(config->home); |
| CLEAR(config->program_name); |
| #undef CLEAR |
| |
| PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| } |
| |
| |
| /* Initialize paths for Py_GetPath(), Py_GetPrefix(), Py_GetExecPrefix() |
| and Py_GetProgramFullPath() */ |
| _PyInitError |
| _PyPathConfig_Init(const _PyCoreConfig *core_config) |
| { |
| if (_Py_path_config.module_search_path) { |
| /* Already initialized */ |
| return _Py_INIT_OK(); |
| } |
| |
| _PyInitError err; |
| _PyPathConfig new_config = _PyPathConfig_INIT; |
| |
| PyMemAllocatorEx old_alloc; |
| _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| |
| /* Calculate program_full_path, prefix, exec_prefix (Unix) |
| or dll_path (Windows), and module_search_path */ |
| err = _PyPathConfig_Calculate(&new_config, core_config); |
| if (_Py_INIT_FAILED(err)) { |
| _PyPathConfig_Clear(&new_config); |
| goto done; |
| } |
| |
| /* Copy home and program_name from core_config */ |
| if (core_config->home != NULL) { |
| new_config.home = _PyMem_RawWcsdup(core_config->home); |
| if (new_config.home == NULL) { |
| err = _Py_INIT_NO_MEMORY(); |
| goto done; |
| } |
| } |
| else { |
| new_config.home = NULL; |
| } |
| |
| new_config.program_name = _PyMem_RawWcsdup(core_config->program_name); |
| if (new_config.program_name == NULL) { |
| err = _Py_INIT_NO_MEMORY(); |
| goto done; |
| } |
| |
| _PyPathConfig_Clear(&_Py_path_config); |
| _Py_path_config = new_config; |
| |
| err = _Py_INIT_OK(); |
| |
| done: |
| PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| return err; |
| } |
| |
| |
| static void |
| pathconfig_global_init(void) |
| { |
| if (_Py_path_config.module_search_path) { |
| /* Already initialized */ |
| return; |
| } |
| |
| _PyInitError err; |
| _PyCoreConfig config = _PyCoreConfig_INIT; |
| |
| err = _PyCoreConfig_ReadEnv(&config); |
| if (_Py_INIT_FAILED(err)) { |
| goto error; |
| } |
| |
| err = _PyCoreConfig_Read(&config); |
| if (_Py_INIT_FAILED(err)) { |
| goto error; |
| } |
| |
| err = _PyPathConfig_Init(&config); |
| if (_Py_INIT_FAILED(err)) { |
| goto error; |
| } |
| |
| _PyCoreConfig_Clear(&config); |
| return; |
| |
| error: |
| _PyCoreConfig_Clear(&config); |
| _Py_FatalInitError(err); |
| } |
| |
| |
| /* External interface */ |
| |
| void |
| Py_SetPath(const wchar_t *path) |
| { |
| if (path == NULL) { |
| _PyPathConfig_Clear(&_Py_path_config); |
| return; |
| } |
| |
| PyMemAllocatorEx old_alloc; |
| _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| |
| _PyPathConfig new_config; |
| new_config.program_full_path = _PyMem_RawWcsdup(Py_GetProgramName()); |
| new_config.prefix = _PyMem_RawWcsdup(L""); |
| #ifdef MS_WINDOWS |
| new_config.dll_path = _PyMem_RawWcsdup(L""); |
| #else |
| new_config.exec_prefix = _PyMem_RawWcsdup(L""); |
| #endif |
| new_config.module_search_path = _PyMem_RawWcsdup(path); |
| |
| /* steal the home and program_name values (to leave them unchanged) */ |
| new_config.home = _Py_path_config.home; |
| _Py_path_config.home = NULL; |
| new_config.program_name = _Py_path_config.program_name; |
| _Py_path_config.program_name = NULL; |
| |
| _PyPathConfig_Clear(&_Py_path_config); |
| _Py_path_config = new_config; |
| |
| PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| } |
| |
| |
| void |
| Py_SetPythonHome(const wchar_t *home) |
| { |
| if (home == NULL) { |
| return; |
| } |
| |
| PyMemAllocatorEx old_alloc; |
| _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| |
| PyMem_RawFree(_Py_path_config.home); |
| _Py_path_config.home = _PyMem_RawWcsdup(home); |
| |
| PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| |
| if (_Py_path_config.home == NULL) { |
| Py_FatalError("Py_SetPythonHome() failed: out of memory"); |
| } |
| } |
| |
| |
| void |
| Py_SetProgramName(const wchar_t *program_name) |
| { |
| if (program_name == NULL || program_name[0] == L'\0') { |
| return; |
| } |
| |
| PyMemAllocatorEx old_alloc; |
| _PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| |
| PyMem_RawFree(_Py_path_config.program_name); |
| _Py_path_config.program_name = _PyMem_RawWcsdup(program_name); |
| |
| PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc); |
| |
| if (_Py_path_config.program_name == NULL) { |
| Py_FatalError("Py_SetProgramName() failed: out of memory"); |
| } |
| } |
| |
| |
| wchar_t * |
| Py_GetPath(void) |
| { |
| pathconfig_global_init(); |
| return _Py_path_config.module_search_path; |
| } |
| |
| |
| wchar_t * |
| Py_GetPrefix(void) |
| { |
| pathconfig_global_init(); |
| return _Py_path_config.prefix; |
| } |
| |
| |
| wchar_t * |
| Py_GetExecPrefix(void) |
| { |
| #ifdef MS_WINDOWS |
| return Py_GetPrefix(); |
| #else |
| pathconfig_global_init(); |
| return _Py_path_config.exec_prefix; |
| #endif |
| } |
| |
| |
| wchar_t * |
| Py_GetProgramFullPath(void) |
| { |
| pathconfig_global_init(); |
| return _Py_path_config.program_full_path; |
| } |
| |
| |
| wchar_t* |
| Py_GetPythonHome(void) |
| { |
| pathconfig_global_init(); |
| return _Py_path_config.home; |
| } |
| |
| |
| wchar_t * |
| Py_GetProgramName(void) |
| { |
| pathconfig_global_init(); |
| return _Py_path_config.program_name; |
| } |
| |
| |
| #define _HAVE_SCRIPT_ARGUMENT(argc, argv) \ |
| (argc > 0 && argv0 != NULL && \ |
| wcscmp(argv0, L"-c") != 0 && wcscmp(argv0, L"-m") != 0) |
| |
| /* Compute argv[0] which will be prepended to sys.argv */ |
| PyObject* |
| _PyPathConfig_ComputeArgv0(int argc, wchar_t **argv) |
| { |
| wchar_t *argv0; |
| wchar_t *p = NULL; |
| Py_ssize_t n = 0; |
| #ifdef HAVE_READLINK |
| wchar_t link[MAXPATHLEN+1]; |
| wchar_t argv0copy[2*MAXPATHLEN+1]; |
| int nr = 0; |
| #endif |
| #if defined(HAVE_REALPATH) |
| wchar_t fullpath[MAXPATHLEN]; |
| #elif defined(MS_WINDOWS) |
| wchar_t fullpath[MAX_PATH]; |
| #endif |
| |
| |
| argv0 = argv[0]; |
| |
| #ifdef HAVE_READLINK |
| if (_HAVE_SCRIPT_ARGUMENT(argc, argv)) |
| nr = _Py_wreadlink(argv0, link, MAXPATHLEN); |
| if (nr > 0) { |
| /* It's a symlink */ |
| link[nr] = '\0'; |
| if (link[0] == SEP) |
| argv0 = link; /* Link to absolute path */ |
| else if (wcschr(link, SEP) == NULL) |
| ; /* Link without path */ |
| else { |
| /* Must join(dirname(argv0), link) */ |
| wchar_t *q = wcsrchr(argv0, SEP); |
| if (q == NULL) |
| argv0 = link; /* argv0 without path */ |
| else { |
| /* Must make a copy, argv0copy has room for 2 * MAXPATHLEN */ |
| wcsncpy(argv0copy, argv0, MAXPATHLEN); |
| q = wcsrchr(argv0copy, SEP); |
| wcsncpy(q+1, link, MAXPATHLEN); |
| q[MAXPATHLEN + 1] = L'\0'; |
| argv0 = argv0copy; |
| } |
| } |
| } |
| #endif /* HAVE_READLINK */ |
| |
| #if SEP == '\\' |
| /* Special case for Microsoft filename syntax */ |
| if (_HAVE_SCRIPT_ARGUMENT(argc, argv)) { |
| wchar_t *q; |
| #if defined(MS_WINDOWS) |
| /* Replace the first element in argv with the full path. */ |
| wchar_t *ptemp; |
| if (GetFullPathNameW(argv0, |
| Py_ARRAY_LENGTH(fullpath), |
| fullpath, |
| &ptemp)) { |
| argv0 = fullpath; |
| } |
| #endif |
| p = wcsrchr(argv0, SEP); |
| /* Test for alternate separator */ |
| q = wcsrchr(p ? p : argv0, '/'); |
| if (q != NULL) |
| p = q; |
| if (p != NULL) { |
| n = p + 1 - argv0; |
| if (n > 1 && p[-1] != ':') |
| n--; /* Drop trailing separator */ |
| } |
| } |
| #else /* All other filename syntaxes */ |
| if (_HAVE_SCRIPT_ARGUMENT(argc, argv)) { |
| #if defined(HAVE_REALPATH) |
| if (_Py_wrealpath(argv0, fullpath, Py_ARRAY_LENGTH(fullpath))) { |
| argv0 = fullpath; |
| } |
| #endif |
| p = wcsrchr(argv0, SEP); |
| } |
| if (p != NULL) { |
| n = p + 1 - argv0; |
| #if SEP == '/' /* Special case for Unix filename syntax */ |
| if (n > 1) |
| n--; /* Drop trailing separator */ |
| #endif /* Unix */ |
| } |
| #endif /* All others */ |
| |
| return PyUnicode_FromWideChar(argv0, n); |
| } |
| |
| #ifdef __cplusplus |
| } |
| #endif |