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-rw-r--r--Misc/NEWS3
-rw-r--r--Objects/fileobject.c28
2 files changed, 25 insertions, 6 deletions
diff --git a/Misc/NEWS b/Misc/NEWS
index 3d5dfa94db0..c3068c4260b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@ Release date: tba
Core and Builtins
-----------------
+- Issue #25182: The stdprinter (used as sys.stderr before the io module is
+ imported at startup) now uses the backslashreplace error handler.
+
- Issue #24891: Fix a race condition at Python startup if the file descriptor
of stdin (0), stdout (1) or stderr (2) is closed while Python is creating
sys.stdin, sys.stdout and sys.stderr objects. These attributes are now set
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 596f909755d..403d718dfe5 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -372,8 +372,11 @@ PyFile_NewStdPrinter(int fd)
static PyObject *
stdprinter_write(PyStdPrinter_Object *self, PyObject *args)
{
- char *c;
+ PyObject *unicode;
+ PyObject *bytes = NULL;
+ char *str;
Py_ssize_t n;
+ int _errno;
if (self->fd < 0) {
/* fd might be invalid on Windows
@@ -383,24 +386,37 @@ stdprinter_write(PyStdPrinter_Object *self, PyObject *args)
Py_RETURN_NONE;
}
- if (!PyArg_ParseTuple(args, "s", &c)) {
+ if (!PyArg_ParseTuple(args, "U", &unicode))
return NULL;
+
+ /* encode Unicode to UTF-8 */
+ str = PyUnicode_AsUTF8AndSize(unicode, &n);
+ if (str == NULL) {
+ PyErr_Clear();
+ bytes = _PyUnicode_AsUTF8String(unicode, "backslashreplace");
+ if (bytes == NULL)
+ return NULL;
+ if (PyBytes_AsStringAndSize(bytes, &str, &n) < 0) {
+ Py_DECREF(bytes);
+ return NULL;
+ }
}
- n = strlen(c);
Py_BEGIN_ALLOW_THREADS
errno = 0;
#ifdef MS_WINDOWS
if (n > INT_MAX)
n = INT_MAX;
- n = write(self->fd, c, (int)n);
+ n = write(self->fd, str, (int)n);
#else
- n = write(self->fd, c, n);
+ n = write(self->fd, str, n);
#endif
+ _errno = errno;
Py_END_ALLOW_THREADS
+ Py_XDECREF(bytes);
if (n < 0) {
- if (errno == EAGAIN)
+ if (_errno == EAGAIN)
Py_RETURN_NONE;
PyErr_SetFromErrno(PyExc_IOError);
return NULL;