diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 0436244..bd8480c 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -417,6 +417,19 @@
    Availability: Macintosh, Unix, Windows.
 
 
+.. function:: fchmod(fd, mode)
+
+   Change the mode of the file given by *fd* to the numeric *mode*.  See the docs
+   for :func:`chmod` for possible values of *mode*.  Availability: Unix.
+
+
+.. function:: fchown(fd, uid, gid)
+
+   Change the owner and group id of the file given by *fd* to the numeric *uid*
+   and *gid*.  To leave one of the ids unchanged, set it to -1.
+   Availability: Unix.
+
+
 .. function:: fdatasync(fd)
 
    Force write of file with filedescriptor *fd* to disk. Does not force update of
@@ -475,6 +488,13 @@
    tty(-like) device, else ``False``. Availability: Macintosh, Unix.
 
 
+.. function:: lchmod(path, mode)
+
+   Change the mode of *path* to the numeric *mode*. If path is a symlink, this
+   affects the symlink rather than the target. See the docs for :func:`chmod`
+   for possible values of *mode*.  Availability: Unix.
+
+
 .. function:: lseek(fd, pos, how)
 
    Set the current position of file descriptor *fd* to position *pos*, modified by
diff --git a/Lib/test/test_bigmem.py b/Lib/test/test_bigmem.py
index 7244e1b..652a523 100644
--- a/Lib/test/test_bigmem.py
+++ b/Lib/test/test_bigmem.py
@@ -64,13 +64,15 @@
         self.assertEquals(s.count('i'), 1)
         self.assertEquals(s.count('j'), 0)
 
-    @bigmemtest(minsize=0, memuse=1)
+    @bigmemtest(minsize=_2G + 2, memuse=3)
     def test_decode(self, size):
-        pass
+        s = '.' * size
+        self.assertEquals(len(s.decode('utf-8')), size)
 
-    @bigmemtest(minsize=0, memuse=1)
+    @bigmemtest(minsize=_2G + 2, memuse=3)
     def test_encode(self, size):
-        pass
+        s = u'.' * size
+        self.assertEquals(len(s.encode('utf-8')), size)
 
     @bigmemtest(minsize=_2G, memuse=2)
     def test_endswith(self, size):
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 018d68c..f183d86 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -186,6 +186,12 @@
 #else
 extern int chmod(const char *, mode_t);
 #endif
+/*#ifdef HAVE_FCHMOD
+extern int fchmod(int, mode_t);
+#endif*/
+/*#ifdef HAVE_LCHMOD
+extern int lchmod(const char *, mode_t);
+#endif*/
 extern int chown(const char *, uid_t, gid_t);
 extern char *getcwd(char *, int);
 extern char *strerror(int);
@@ -1747,6 +1753,52 @@
 #endif
 }
 
+#ifdef HAVE_FCHMOD
+PyDoc_STRVAR(posix_fchmod__doc__,
+"fchmod(fd, mode)\n\n\
+Change the access permissions of the file given by file\n\
+descriptor fd.");
+
+static PyObject *
+posix_fchmod(PyObject *self, PyObject *args)
+{
+	int fd, mode, res;
+	if (!PyArg_ParseTuple(args, "ii:fchmod", &fd, &mode))
+		return NULL;
+	Py_BEGIN_ALLOW_THREADS
+	res = fchmod(fd, mode);
+	Py_END_ALLOW_THREADS
+	if (res < 0)
+		return posix_error();
+	Py_RETURN_NONE;
+}
+#endif /* HAVE_FCHMOD */
+
+#ifdef HAVE_LCHMOD
+PyDoc_STRVAR(posix_lchmod__doc__,
+"lchmod(path, mode)\n\n\
+Change the access permissions of a file. If path is a symlink, this\n\
+affects the link itself rather than the target.");
+
+static PyObject *
+posix_lchmod(PyObject *self, PyObject *args)
+{
+	char *path = NULL;
+	int i;
+	int res;
+	if (!PyArg_ParseTuple(args, "eti:lchmod", Py_FileSystemDefaultEncoding,
+	                      &path, &i))
+		return NULL;
+	Py_BEGIN_ALLOW_THREADS
+	res = lchmod(path, i);
+	Py_END_ALLOW_THREADS
+	if (res < 0)
+		return posix_error_with_allocated_filename(path);
+	PyMem_Free(path);
+	Py_RETURN_NONE;
+}
+#endif /* HAVE_LCHMOD */
+
 
 #ifdef HAVE_CHFLAGS
 PyDoc_STRVAR(posix_chflags__doc__,
@@ -1868,6 +1920,28 @@
 }
 #endif /* HAVE_CHOWN */
 
+#ifdef HAVE_FCHOWN
+PyDoc_STRVAR(posix_fchown__doc__,
+"fchown(fd, uid, gid)\n\n\
+Change the owner and group id of the file given by file descriptor\n\
+fd to the numeric uid and gid.");
+
+static PyObject *
+posix_fchown(PyObject *self, PyObject *args)
+{
+	int fd, uid, gid;
+	int res;
+	if (!PyArg_ParseTuple(args, "iii:chown", &fd, &uid, &gid))
+		return NULL;
+	Py_BEGIN_ALLOW_THREADS
+	res = fchown(fd, (uid_t) uid, (gid_t) gid);
+	Py_END_ALLOW_THREADS
+	if (res < 0)
+		return posix_error();
+	Py_RETURN_NONE;
+}
+#endif /* HAVE_FCHOWN */
+
 #ifdef HAVE_LCHOWN
 PyDoc_STRVAR(posix_lchown__doc__,
 "lchown(path, uid, gid)\n\n\
@@ -6664,9 +6738,18 @@
 	{"chflags",	posix_chflags, METH_VARARGS, posix_chflags__doc__},
 #endif /* HAVE_CHFLAGS */
 	{"chmod",	posix_chmod, METH_VARARGS, posix_chmod__doc__},
+#ifdef HAVE_FCHMOD
+	{"fchmod",	posix_fchmod, METH_VARARGS, posix_fchmod__doc__},
+#endif /* HAVE_FCHMOD */
 #ifdef HAVE_CHOWN
 	{"chown",	posix_chown, METH_VARARGS, posix_chown__doc__},
 #endif /* HAVE_CHOWN */
+#ifdef HAVE_LCHMOD
+	{"lchmod",	posix_lchmod, METH_VARARGS, posix_lchmod__doc__},
+#endif /* HAVE_LCHMOD */
+#ifdef HAVE_FCHOWN
+	{"fchown",	posix_fchown, METH_VARARGS, posix_fchown__doc__},
+#endif /* HAVE_FCHOWN */
 #ifdef HAVE_LCHFLAGS
 	{"lchflags",	posix_lchflags, METH_VARARGS, posix_lchflags__doc__},
 #endif /* HAVE_LCHFLAGS */
diff --git a/Python/getargs.c b/Python/getargs.c
index 584805e..f6cdd7c 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -1182,7 +1182,7 @@
 	case 'w': { /* memory buffer, read-write access */
 		void **p = va_arg(*p_va, void **);
 		PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
-		int count;
+		Py_ssize_t count;
                 int temp=-1;
                 Py_buffer view;
 
@@ -1216,7 +1216,7 @@
 	case 't': { /* 8-bit character buffer, read-only access */
 		char **p = va_arg(*p_va, char **);
 		PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
-		int count;
+		Py_ssize_t count;
                 Py_buffer view;
 
 		if (*format++ != '#')
diff --git a/configure b/configure
index 53c1ec5..c5b22a4 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 58054 .
+# From configure.in Revision: 58817 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.61 for python 3.0.
 #
@@ -15440,11 +15440,14 @@
 
 
 
+
+
+
 for ac_func in alarm bind_textdomain_codeset chflags chown clock confstr \
- ctermid execv fork fpathconf ftime ftruncate \
+ ctermid execv fchmod fchown fork fpathconf ftime ftruncate \
  gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
  getpriority getpwent getspnam getspent getsid getwd \
- kill killpg lchflags lchown lstat mkfifo mknod mktime \
+ kill killpg lchflags lchmod lchown lstat mkfifo mknod mktime \
  mremap nice pathconf pause plock poll pthread_init \
  putenv readlink realpath \
  select setegid seteuid setgid \
diff --git a/configure.in b/configure.in
index 059d184..608d6ae 100644
--- a/configure.in
+++ b/configure.in
@@ -2275,10 +2275,10 @@
 
 # checks for library functions
 AC_CHECK_FUNCS(alarm bind_textdomain_codeset chflags chown clock confstr \
- ctermid execv fork fpathconf ftime ftruncate \
+ ctermid execv fchmod fchown fork fpathconf ftime ftruncate \
  gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
  getpriority getpwent getspnam getspent getsid getwd \
- kill killpg lchflags lchown lstat mkfifo mknod mktime \
+ kill killpg lchflags lchmod lchown lstat mkfifo mknod mktime \
  mremap nice pathconf pause plock poll pthread_init \
  putenv readlink realpath \
  select setegid seteuid setgid \
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 11ea4a0..4f45cb9 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -141,6 +141,12 @@
 /* Define if you have the 'fchdir' function. */
 #undef HAVE_FCHDIR
 
+/* Define to 1 if you have the `fchmod' function. */
+#undef HAVE_FCHMOD
+
+/* Define to 1 if you have the `fchown' function. */
+#undef HAVE_FCHOWN
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -297,6 +303,9 @@
 /* Define to 1 if you have the `lchflags' function. */
 #undef HAVE_LCHFLAGS
 
+/* Define to 1 if you have the `lchmod' function. */
+#undef HAVE_LCHMOD
+
 /* Define to 1 if you have the `lchown' function. */
 #undef HAVE_LCHOWN