Index: Modules/posixmodule.c
===================================================================
--- Modules/posixmodule.c	(revision 78265)
+++ Modules/posixmodule.c	(working copy)
@@ -1306,8 +1306,8 @@
         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, PyInt_FromLong((long)(int)st->st_uid));
+        PyStructSequence_SET_ITEM(v, 5, PyInt_FromLong((long)(int)st->st_gid));
 #ifdef HAVE_LARGEFILE_SUPPORT
         PyStructSequence_SET_ITEM(v, 6,
 				  PyLong_FromLongLong((PY_LONG_LONG)st->st_size));
@@ -1884,9 +1884,9 @@
 posix_chown(PyObject *self, PyObject *args)
 {
 	char *path = NULL;
-	long uid, gid;
+	int uid, gid;
 	int res;
-	if (!PyArg_ParseTuple(args, "etll:chown",
+	if (!PyArg_ParseTuple(args, "etii:chown",
 	                      Py_FileSystemDefaultEncoding, &path,
 	                      &uid, &gid))
 		return NULL;
@@ -3782,7 +3782,7 @@
 static PyObject *
 posix_getegid(PyObject *self, PyObject *noargs)
 {
-	return PyInt_FromLong((long)getegid());
+	return PyInt_FromLong((long)(int)getegid());
 }
 #endif
 
@@ -3795,7 +3795,7 @@
 static PyObject *
 posix_geteuid(PyObject *self, PyObject *noargs)
 {
-	return PyInt_FromLong((long)geteuid());
+	return PyInt_FromLong((long)(int)geteuid());
 }
 #endif
 
@@ -3808,7 +3808,7 @@
 static PyObject *
 posix_getgid(PyObject *self, PyObject *noargs)
 {
-	return PyInt_FromLong((long)getgid());
+	return PyInt_FromLong((long)(int)getgid());
 }
 #endif
 
@@ -3829,6 +3829,9 @@
 "getgroups() -> list of group IDs\n\n\
 Return list of supplemental group IDs for the process.");
 
+#include <pwd.h>
+int getgrouplist_2(const char *name, gid_t basegid, gid_t **groups);
+
 static PyObject *
 posix_getgroups(PyObject *self, PyObject *noargs)
 {
@@ -3840,18 +3843,25 @@
         /* defined to be 16 on Solaris7, so this should be a small number */
 #define MAX_GROUPS 64
 #endif
-        gid_t grouplist[MAX_GROUPS];
+        gid_t *grouplist = NULL;
+        struct passwd *pw;
         int n;
 
-        n = getgroups(MAX_GROUPS, grouplist);
-        if (n < 0)
+        if ((pw = getpwuid(getuid())) == NULL) {
+            errno = EINVAL;
             posix_error();
-        else {
+            return NULL;
+        }
+        n = getgrouplist_2(pw->pw_name, pw->pw_gid, &grouplist);
+        if (n < 0) {
+            errno = EINVAL;
+            posix_error();
+        } else {
             result = PyList_New(n);
             if (result != NULL) {
                 int i;
                 for (i = 0; i < n; ++i) {
-                    PyObject *o = PyInt_FromLong((long)grouplist[i]);
+                    PyObject *o = PyInt_FromLong((long)(int)grouplist[i]);
                     if (o == NULL) {
                         Py_DECREF(result);
                         result = NULL;
@@ -3862,6 +3872,7 @@
             }
         }
 
+    if (grouplist) free(grouplist);
     return result;
 }
 #endif
@@ -3996,7 +4007,7 @@
 static PyObject *
 posix_getuid(PyObject *self, PyObject *noargs)
 {
-	return PyInt_FromLong((long)getuid());
+	return PyInt_FromLong((long)(int)getuid());
 }
 #endif
 
@@ -5713,15 +5724,15 @@
 posix_setgroups(PyObject *self, PyObject *groups)
 {
 	int i, len;
-        gid_t grouplist[MAX_GROUPS];
+        gid_t *grouplist;
 
 	if (!PySequence_Check(groups)) {
 		PyErr_SetString(PyExc_TypeError, "setgroups argument must be a sequence");
 		return NULL;
 	}
 	len = PySequence_Size(groups);
-	if (len > MAX_GROUPS) {
-		PyErr_SetString(PyExc_ValueError, "too many groups");
+	if ((grouplist = (gid_t *)malloc(len * sizeof(gid_t))) == NULL) {
+		PyErr_NoMemory();
 		return NULL;
 	}
 	for(i = 0; i < len; i++) {
@@ -5745,7 +5756,7 @@
 				}
 				grouplist[i] = x;
 				/* read back to see if it fits in gid_t */
-				if (grouplist[i] != x) {
+				if ((int)grouplist[i] != x) {
 					PyErr_SetString(PyExc_TypeError,
 							"group id too big");
 					Py_DECREF(elem);
@@ -5755,7 +5766,7 @@
 		} else {
 			long x  = PyInt_AsLong(elem);
 			grouplist[i] = x;
-			if (grouplist[i] != x) {
+			if ((int)grouplist[i] != x) {
 				PyErr_SetString(PyExc_TypeError,
 						"group id too big");
 				Py_DECREF(elem);
@@ -5767,6 +5778,7 @@
 
 	if (setgroups(len, grouplist) < 0)
 		return posix_error();
+	free(grouplist);
 	Py_INCREF(Py_None);
 	return Py_None;
 }
@@ -7538,6 +7550,15 @@
 #ifdef _MIPS_CS_VENDOR
     {"MIPS_CS_VENDOR",	_MIPS_CS_VENDOR},
 #endif
+#ifdef _CS_DARWIN_USER_DIR
+    {"CS_DARWIN_USER_DIR", _CS_DARWIN_USER_DIR},
+#endif
+#ifdef _CS_DARWIN_USER_TEMP_DIR
+    {"CS_DARWIN_USER_TEMP_DIR", _CS_DARWIN_USER_TEMP_DIR},
+#endif
+#ifdef _CS_DARWIN_USER_CACHE_DIR
+    {"CS_DARWIN_USER_CACHE_DIR", _CS_DARWIN_USER_CACHE_DIR},
+#endif
 };
 
 static int