Additional fix for issue #12268: The io module file object write methods no

longer abort early when a write system call is interrupted (EINTR).

Misc/NEWS

@@ -506,6 +506,12 @@ Library
 - Issue #15906: Fix a regression in `argparse` caused by the preceding change,
   when ``action='append'``, ``type='str'`` and ``default=[]``.
 
+Extension Modules
+-----------------
+
+- Issue #12268: The io module file object write methods no longer abort early
+  when one of its write system calls is interrupted (EINTR).
+
 Tests
 -----
 

Modules/_io/iobase.c

@@ -669,7 +669,10 @@ iobase_writelines(PyObject *self, PyObject *args)
                 break; /* Stop Iteration */
         }
 
-        res = PyObject_CallMethodObjArgs(self, _PyIO_str_write, line, NULL);
+        res = NULL;
+        do {
+            res = PyObject_CallMethodObjArgs(self, _PyIO_str_write, line, NULL);
+        } while (res == NULL && _PyIO_trap_eintr());
         Py_DECREF(line);
         if (res == NULL) {
             Py_DECREF(iter);

Modules/_io/textio.c

@@ -1247,8 +1247,11 @@ _textiowrapper_writeflush(textio *self)
     Py_DECREF(pending);
     if (b == NULL)
         return -1;
-    ret = PyObject_CallMethodObjArgs(self->buffer,
-                                     _PyIO_str_write, b, NULL);
+    ret = NULL;
+    do {
+        ret = PyObject_CallMethodObjArgs(self->buffer,
+                                         _PyIO_str_write, b, NULL);
+    } while (ret == NULL && _PyIO_trap_eintr());
     Py_DECREF(b);
     if (ret == NULL)
         return -1;