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bpo-37369: Fix initialization of sys members when launched via an app container (GH-14467)

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sys._base_executable is now always defined on all platforms, and can be overridden through configuration.
Also adds test.support.PythonSymlink to encapsulate platform-specific logic for symlinking sys.executable
This commit is contained in:
Steve Dower 2019-06-29 14:28:59 -07:00 • committed by GitHub
parent 0cba121029
commit 323e743d48
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GPG key ID: 4AEE18F83AFDEB23
17 changed files with 411 additions and 278 deletions
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30
Python/pathconfig.c
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@ -57,6 +57,7 @@ pathconfig_clear(_PyPathConfig *config)
CLEAR(config->module_search_path);
CLEAR(config->home);
CLEAR(config->program_name);
CLEAR(config->base_executable);
#undef CLEAR
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
@ -89,6 +90,14 @@ pathconfig_calculate(_PyPathConfig *pathconfig, const PyConfig *config)
status = _PyStatus_NO_MEMORY();
goto error;
}
if (config->base_executable) {
PyMem_RawFree(new_config.base_executable);
if (copy_wstr(&new_config.base_executable,
config->base_executable) < 0) {
status = _PyStatus_NO_MEMORY();
goto error;
}
}
pathconfig_clear(pathconfig);
*pathconfig = new_config;
@ -132,6 +141,7 @@ _PyPathConfig_SetGlobal(const _PyPathConfig *config)
COPY_ATTR(module_search_path);
COPY_ATTR(program_name);
COPY_ATTR(home);
COPY_ATTR(base_executable);
pathconfig_clear(&_Py_path_config);
/* Steal new_config strings; don't clear new_config */
@ -224,6 +234,9 @@ _PyConfig_SetPathConfig(const PyConfig *config)
if (copy_wstr(&pathconfig.home, config->home) < 0) {
goto no_memory;
}
if (copy_wstr(&pathconfig.base_executable, config->base_executable) < 0) {
goto no_memory;
}
status = _PyPathConfig_SetGlobal(&pathconfig);
if (_PyStatus_EXCEPTION(status)) {
@ -321,6 +334,13 @@ config_calculate_pathconfig(PyConfig *config)
}
}
if (config->base_executable == NULL) {
if (copy_wstr(&config->base_executable,
pathconfig.base_executable) < 0) {
goto no_memory;
}
}
if (pathconfig.isolated != -1) {
config->isolated = pathconfig.isolated;
}
@ -367,6 +387,14 @@ _PyConfig_InitPathConfig(PyConfig *config)
return _PyStatus_NO_MEMORY();
}
}
if (config->base_executable == NULL) {
if (copy_wstr(&config->base_executable,
config->executable) < 0) {
return _PyStatus_NO_MEMORY();
}
}
return _PyStatus_OK();
}
@ -434,6 +462,8 @@ Py_SetPath(const wchar_t *path)
_Py_path_config.home = NULL;
new_config.program_name = _Py_path_config.program_name;
_Py_path_config.program_name = NULL;
new_config.base_executable = _Py_path_config.base_executable;
_Py_path_config.base_executable = NULL;
pathconfig_clear(&_Py_path_config);
_Py_path_config = new_config;