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gh-149879: Fix sys.orig_argv[0] on Cygwin: add ".exe" suffix (#149885)

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Victor Stinner 2026-05-15 17:55:34 +02:00 • committed by GitHub
parent 50aff5fc5c
commit c575172425
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1 changed files with 45 additions and 0 deletions
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45
Python/initconfig.c
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@ -3688,6 +3688,44 @@ PyConfig_SetWideStringList(PyConfig *config, PyWideStringList *list,
}
#ifdef __CYGWIN__
// Cygwin strips ".exe" suffix from argv[0].
// Add again the ".exe" suffix.
static PyStatus
config_argv0_add_exe(PyConfig *config)
{
if (config->argv.length < 1) {
return _PyStatus_OK();
}
const wchar_t *argv0 = config->argv.items[0];
size_t len = wcslen(argv0);
if (len >= 5 && wcscmp(argv0 + len - 4, L".exe") == 0) {
return _PyStatus_OK();
}
wchar_t *exe = PyMem_RawMalloc((len + 4 + 1) * sizeof(wchar_t));
if (exe == NULL) {
return _PyStatus_NO_MEMORY();
}
wcscpy(exe, argv0);
wcscat(exe, L".exe");
FILE *fp = _Py_wfopen(exe, L"rb");
if (fp != NULL) {
fclose(fp);
PyMem_RawFree(config->argv.items[0]);
config->argv.items[0] = exe;
}
else {
PyMem_RawFree(exe);
}
return _PyStatus_OK();
}
#endif
/* Read the configuration into PyConfig from:
* Command line arguments
@ -3707,6 +3745,13 @@ _PyConfig_Read(PyConfig *config, int compute_path_config)
config_get_global_vars(config);
#ifdef __CYGWIN__
status = config_argv0_add_exe(config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
#endif
if (config->orig_argv.length == 0
&& !(config->argv.length == 1
&& wcscmp(config->argv.items[0], L"") == 0))