Index: Modules/posixmodule.c
===================================================================
--- Modules/posixmodule.c	(révision 70584)
+++ Modules/posixmodule.c	(copie de travail)
@@ -1394,8 +1394,10 @@
         PyStructSequence_SET_ITEM(v, 2, PyInt_FromLong((long)st->st_dev));
 #endif
         PyStructSequence_SET_ITEM(v, 3, PyInt_FromLong((long)st->st_nlink));
-        PyStructSequence_SET_ITEM(v, 4, PyInt_FromLong((long)st->st_uid));
-        PyStructSequence_SET_ITEM(v, 5, PyInt_FromLong((long)st->st_gid));
+        PyStructSequence_SET_ITEM(v, 4,
+            PyLong_FromUnsignedLong((unsigned long)st->st_uid));
+        PyStructSequence_SET_ITEM(v, 5,
+            PyLong_FromUnsignedLong((unsigned long)st->st_gid));
 #ifdef HAVE_LARGEFILE_SUPPORT
         PyStructSequence_SET_ITEM(v, 6,
 				  PyLong_FromLongLong((PY_LONG_LONG)st->st_size));
@@ -1971,6 +1973,81 @@
 }
 #endif /* HAVE_FDATASYNC */
 
+static int
+parse_uid(PyObject *obj, uid_t *uid)
+{
+	PyObject *index, *number = NULL;
+	long sl;
+	unsigned long ul;
+
+	index = PyNumber_Index(obj);
+	if (index != NULL) {
+		number = PyNumber_Long(index);
+		Py_DECREF(index);
+	}
+	if (number == NULL) {
+		PyErr_SetString(PyExc_TypeError, "user id must be integer");
+		return 0;
+	}
+
+	sl = PyLong_AsLong(number);
+	if (PyErr_Occurred()) {
+		PyErr_Clear();
+	} else if (sl == -1) {
+		Py_DECREF(number);
+		*uid = (uid_t)-1;
+		return 1;
+	}
+
+	ul = PyLong_AsUnsignedLong(number);
+	Py_DECREF(number);
+	*uid = ul;
+	/* read back the value to see if it fitted in uid_t */
+	if (PyErr_Occurred() || *uid != ul) {
+		PyErr_SetString(PyExc_TypeError,
+			"user id is not in range [-1; 2^32-1]");
+		return 0;
+	}
+	return 1;
+}
+
+static int
+parse_gid(PyObject *obj, gid_t *gid)
+{
+	PyObject *index, *number = NULL;
+	long sl;
+	unsigned long ul;
+
+	index = PyNumber_Index(obj);
+	if (index != NULL) {
+		number = PyNumber_Long(index);
+		Py_DECREF(index);
+	}
+	if (number == NULL) {
+		PyErr_SetString(PyExc_TypeError, "group id must be integer");
+		return 0;
+	}
+
+	sl = PyLong_AsLong(number);
+	if (PyErr_Occurred()) {
+		PyErr_Clear();
+	} else if (sl == -1) {
+		Py_DECREF(number);
+		*gid = (gid_t)-1;
+		return 1;
+	}
+
+	ul = PyLong_AsUnsignedLong(number);
+	Py_DECREF(number);
+	*gid = ul;
+	/* read back the value to see if it fitted in gid_t */
+	if (PyErr_Occurred() || *gid != ul) {
+		PyErr_SetString(PyExc_TypeError,
+			"group id is not in range [-1; 2^32-1]");
+		return 0;
+	}
+	return 1;
+}
 
 #ifdef HAVE_CHOWN
 PyDoc_STRVAR(posix_chown__doc__,
@@ -1981,14 +2058,20 @@
 posix_chown(PyObject *self, PyObject *args)
 {
 	char *path = NULL;
-	long uid, gid;
+	PyObject *uidobj, *gidobj;
+	uid_t uid;
+	gid_t gid;
 	int res;
-	if (!PyArg_ParseTuple(args, "etll:chown",
+	if (!PyArg_ParseTuple(args, "etOO:chown",
 	                      Py_FileSystemDefaultEncoding, &path,
-	                      &uid, &gid))
+	                      &uidobj, &gidobj))
+		return NULL;
+	if (!parse_uid(uidobj, &uid))
+		return NULL;
+	if (!parse_gid(gidobj, &gid))
 		return NULL;
 	Py_BEGIN_ALLOW_THREADS
-	res = chown(path, (uid_t) uid, (gid_t) gid);
+	res = chown(path, uid, gid);
 	Py_END_ALLOW_THREADS
 	if (res < 0)
 		return posix_error_with_allocated_filename(path);
@@ -2007,12 +2090,19 @@
 static PyObject *
 posix_fchown(PyObject *self, PyObject *args)
 {
-	int fd, uid, gid;
+	int fd;
+	PyObject *uidobj, *gidobj;
+	uid_t uid;
+	gid_t gid;
 	int res;
-	if (!PyArg_ParseTuple(args, "iii:chown", &fd, &uid, &gid))
+	if (!PyArg_ParseTuple(args, "iOO:fchown", &fd, &uidobj, &gidobj))
+		return NULL;
+	if (!parse_uid(uidobj, &uid))
+		return NULL;
+	if (!parse_gid(gidobj, &gid))
 		return NULL;
 	Py_BEGIN_ALLOW_THREADS
-	res = fchown(fd, (uid_t) uid, (gid_t) gid);
+	res = fchown(fd, uid, gid);
 	Py_END_ALLOW_THREADS
 	if (res < 0)
 		return posix_error();
@@ -5740,39 +5830,10 @@
 		elem = PySequence_GetItem(groups, i);
 		if (!elem)
 			return NULL;
-		if (!PyInt_Check(elem)) {
-			if (!PyLong_Check(elem)) {
-				PyErr_SetString(PyExc_TypeError,
-						"groups must be integers");
-				Py_DECREF(elem);
-				return NULL;
-			} else {
-				unsigned long x = PyLong_AsUnsignedLong(elem);
-				if (PyErr_Occurred()) {
-					PyErr_SetString(PyExc_TypeError, 
-							"group id too big");
-					Py_DECREF(elem);
-					return NULL;
-				}
-				grouplist[i] = x;
-				/* read back the value to see if it fitted in gid_t */
-				if (grouplist[i] != x) {
-					PyErr_SetString(PyExc_TypeError,
-							"group id too big");
+		if (!parse_gid(elem, &grouplist[i])) {
 					Py_DECREF(elem);
 					return NULL;
 				}
-			}
-		} else {
-			long x  = PyInt_AsLong(elem);
-			grouplist[i] = x;
-			if (grouplist[i] != x) {
-				PyErr_SetString(PyExc_TypeError,
-						"group id too big");
-				Py_DECREF(elem);
-				return NULL;
-			}
-		}
 		Py_DECREF(elem);
 	}