bpo-34485: Enhance init_sys_streams() (GH-8978)

Python now gets the locale encoding with C code to initialize the encoding
of standard streams like sys.stdout. Moreover, the encoding is now
initialized to the Python codec name to get a normalized encoding name and
to ensure that the codec is loaded. The change avoids importing
_bootlocale and _locale modules at startup by default.

When the PYTHONIOENCODING environment variable only contains an encoding,
the error handler is now is now set explicitly to "strict".

Rename also get_default_standard_stream_error_handler() to
get_stdio_errors().

Reduce the buffer to format the "cpXXX" string (Windows locale encoding).

1 files changed, 1 insertions, 1 deletions

diff --git a/Modules/_localemodule.c b/Modules/_localemodule.c
index 524886d..3fdbc5e 100644
--- a/Modules/_localemodule.c
+++ b/Modules/_localemodule.c
@@ -319,7 +319,7 @@ exit:
 static PyObject*
 PyLocale_getdefaultlocale(PyObject* self, PyObject *Py_UNUSED(ignored))
 {
-    char encoding[100];
+    char encoding[20];
     char locale[100];
 
     PyOS_snprintf(encoding, sizeof(encoding), "cp%d", GetACP());