Issue #9603: posix.ttyname() and posix.ctermid() decode the terminal name

using the filesystem encoding and surrogateescape error handler. Patch
written by David Watson.

Misc/NEWS

@@ -83,6 +83,10 @@ Extensions
 Library
 -------
 
+- Issue #9603: posix.ttyname() and posix.ctermid() decode the terminal name
+  using the filesystem encoding and surrogateescape error handler. Patch
+  written by David Watson.
+
 - Issue #8688: MANIFEST files created by distutils now include a magic
   comment indicating they are generated.  Manually maintained MANIFESTs
   without this marker will not be overwritten or removed.

Modules/posixmodule.c

@@ -1849,7 +1849,7 @@ posix_ttyname(PyObject *self, PyObject *args)
 #endif
     if (ret == NULL)
         return posix_error();
-    return PyUnicode_FromString(ret);
+    return PyUnicode_DecodeFSDefault(ret);
 }
 #endif
 
@@ -1871,7 +1871,7 @@ posix_ctermid(PyObject *self, PyObject *noargs)
 #endif
     if (ret == NULL)
         return posix_error();
-    return PyUnicode_FromString(buffer);
+    return PyUnicode_DecodeFSDefault(buffer);
 }
 #endif