diff --git a/Doc/lib/libos.tex b/Doc/lib/libos.tex
index b93ce77..624fbf8 100644
--- a/Doc/lib/libos.tex
+++ b/Doc/lib/libos.tex
@@ -254,6 +254,12 @@
 Availability: \UNIX.
 \end{funcdesc}
 
+\begin{funcdesc}{getsid}{pid}
+Calls the system call \cfunction{getsid()}.  See the \UNIX{} manual
+for the semantics.
+Availability: \UNIX.
+\end{funcdesc}
+
 \begin{funcdesc}{setsid}{}
 Calls the system call \cfunction{setsid()}.  See the \UNIX{} manual
 for the semantics.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 9c58c9d..4b3d825 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -4755,6 +4755,25 @@
 #endif
 
 
+#ifdef HAVE_GETSID
+PyDoc_STRVAR(posix_getsid__doc__,
+"getsid(pid) -> sid\n\n\
+Call the system call getsid().");
+
+static PyObject *
+posix_getsid(PyObject *self, PyObject *args)
+{
+	int pid, sid;
+	if (!PyArg_ParseTuple(args, "i:getsid", &pid))
+		return NULL;
+	sid = getsid(pid);
+	if (sid < 0)
+		return posix_error();
+	return PyInt_FromLong((long)sid);
+}
+#endif /* HAVE_GETSID */
+
+
 #ifdef HAVE_SETSID
 PyDoc_STRVAR(posix_setsid__doc__,
 "setsid()\n\n\
@@ -7020,6 +7039,9 @@
 #if defined(HAVE_WAITPID) || defined(HAVE_CWAIT)
 	{"waitpid",	posix_waitpid, METH_VARARGS, posix_waitpid__doc__},
 #endif /* HAVE_WAITPID */
+#ifdef HAVE_GETSID
+	{"getsid",	posix_getsid, METH_VARARGS, posix_getsid__doc__},
+#endif /* HAVE_GETSID */
 #ifdef HAVE_SETSID
 	{"setsid",	posix_setsid, METH_NOARGS, posix_setsid__doc__},
 #endif /* HAVE_SETSID */
diff --git a/configure b/configure
index 1475a04..a5549cc 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 1.438 .
+# From configure.in Revision: 1.439 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.57 for python 2.4.
 #
@@ -13096,10 +13096,11 @@
 
 
 
+
 for ac_func in alarm chown clock confstr ctermid execv \
  fork fpathconf ftime ftruncate \
  gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
- getpriority getpwent getwd \
+ getpriority getpwent getsid getwd \
  kill killpg lchown lstat mkfifo mknod mktime \
  mremap nice pathconf pause plock poll pthread_init \
  putenv readlink realpath \
diff --git a/configure.in b/configure.in
index 289b2cf..c567d21 100644
--- a/configure.in
+++ b/configure.in
@@ -2074,7 +2074,7 @@
 AC_CHECK_FUNCS(alarm chown clock confstr ctermid execv \
  fork fpathconf ftime ftruncate \
  gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
- getpriority getpwent getwd \
+ getpriority getpwent getsid getwd \
  kill killpg lchown lstat mkfifo mknod mktime \
  mremap nice pathconf pause plock poll pthread_init \
  putenv readlink realpath \
diff --git a/pyconfig.h.in b/pyconfig.h.in
index 2ab8b9c..b999f33 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -126,6 +126,9 @@
 /* Define to 1 if you have the `fstatvfs' function. */
 #undef HAVE_FSTATVFS
 
+/* Define if you have the 'fsync' function. */
+#undef HAVE_FSYNC
+
 /* Define to 1 if you have the `ftell64' function. */
 #undef HAVE_FTELL64
 
@@ -198,6 +201,9 @@
 /* Define to 1 if you have the `getpwent' function. */
 #undef HAVE_GETPWENT
 
+/* Define to 1 if you have the `getsid' function. */
+#undef HAVE_GETSID
+
 /* Define to 1 if you have the `gettimeofday' function. */
 #undef HAVE_GETTIMEOFDAY
 
@@ -485,9 +491,6 @@
 /* Define if you have the 'symlink' function. */
 #undef HAVE_SYMLINK
 
-/* Define if you have the 'fsync' function. */
-#undef HAVE_FSYNC
-
 /* Define to 1 if you have the `sysconf' function. */
 #undef HAVE_SYSCONF
 
@@ -616,7 +619,8 @@
 #undef HAVE_UNSETENV
 
 /* Define if you have a useable wchar_t type defined in wchar.h; useable means
-   wchar_t must be 16-bit unsigned type. (see Include/unicodeobject.h). */
+   wchar_t must be an unsigned type with at least 16 bits. (see
+   Include/unicodeobject.h). */
 #undef HAVE_USABLE_WCHAR_T
 
 /* Define to 1 if you have the `utimes' function. */