Index: Modules/_ctypes/callproc.c
===================================================================
--- Modules/_ctypes/callproc.c	(révision 80063)
+++ Modules/_ctypes/callproc.c	(copie de travail)
@@ -92,7 +92,7 @@
   ctypes maintains thread-local storage that has space for two error numbers:
   private copies of the system 'errno' value and, on Windows, the system error code
   accessed by the GetLastError() and SetLastError() api functions.
-  
+
   Foreign functions created with CDLL(..., use_errno=True), when called, swap
   the system 'errno' value with the private copy just before the actual
   function call, and swapped again immediately afterwards.  The 'use_errno'
@@ -289,7 +289,7 @@
 				"exception: single step");
 		break;
 
-	case EXCEPTION_ARRAY_BOUNDS_EXCEEDED: 
+	case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
 		/* The thread attempted to access an array element
 		   that is out of bounds, and the underlying hardware
 		   supports bounds checking. */
@@ -462,7 +462,7 @@
 		sprintf(buffer, "<cparam '%c' (%ld)>",
 			self->tag, self->value.l);
 		break;
-		
+
 #ifdef HAVE_LONG_LONG
 	case 'q':
 	case 'Q':
@@ -703,7 +703,7 @@
 			return result;
 		}
 		PyErr_Format(PyExc_TypeError,
-			     "Don't know how to convert parameter %d", 
+			     "Don't know how to convert parameter %d",
 			     Py_SAFE_DOWNCAST(index, Py_ssize_t, int));
 		return -1;
 	}
@@ -773,7 +773,7 @@
 				"No ffi_type for result");
 		return -1;
 	}
-	
+
 	cc = FFI_DEFAULT_ABI;
 #if defined(MS_WIN32) && !defined(MS_WIN64) && !defined(_WIN32_WCE)
 	if ((flags & FUNCFLAG_CDECL) == 0)
@@ -1147,7 +1147,7 @@
 	}
 	for (i = 0; i < argcount; ++i) {
 		atypes[i] = args[i].ffi_type;
-		if (atypes[i]->type == FFI_TYPE_STRUCT 
+		if (atypes[i]->type == FFI_TYPE_STRUCT
 #ifdef _WIN64
 		    && atypes[i]->size <= sizeof(void *)
 #endif
@@ -1371,18 +1371,25 @@
 
 static PyObject *py_dl_open(PyObject *self, PyObject *args)
 {
-	char *name;
+	PyObject *name;
+	char *name_str;
 	void * handle;
-#ifdef RTLD_LOCAL	
+#ifdef RTLD_LOCAL
 	int mode = RTLD_NOW | RTLD_LOCAL;
 #else
 	/* cygwin doesn't define RTLD_LOCAL */
 	int mode = RTLD_NOW;
 #endif
-	if (!PyArg_ParseTuple(args, "z|i:dlopen", &name, &mode))
+	if (!PyArg_ParseTuple(args, "O&|i:dlopen",
+	                      PyUnicode_FSConverter, &name, &mode))
 		return NULL;
 	mode |= RTLD_NOW;
-	handle = ctypes_dlopen(name, mode);
+	if (PyBytes_Check(name))
+		name_str = PyBytes_AS_STRING(name);
+	else
+		name_str = PyByteArray_AS_STRING(name);
+	handle = ctypes_dlopen(name_str, mode);
+	Py_XDECREF(name);
 	if (!handle) {
 		char *errmsg = ctypes_dlerror();
 		if (!errmsg)