Index: Modules/posixmodule.c
===================================================================
--- Modules/posixmodule.c	(révision 83115)
+++ Modules/posixmodule.c	(copie de travail)
@@ -2207,8 +2207,11 @@
 static PyObject *
 posix_getcwd(int use_bytes)
 {
-    char buf[1026];
-    char *res;
+    const int bufsize_incr = 1024;
+    int bufsize = 0;
+    char *buf = NULL, *oldbuf;
+    char *res = NULL;
+    PyObject *path;
 
 #ifdef MS_WINDOWS
     if (!use_bytes) {
@@ -2242,17 +2245,37 @@
 #endif
 
     Py_BEGIN_ALLOW_THREADS
+    do {
+        bufsize = bufsize + bufsize_incr;
+        oldbuf = buf;
+        buf = PyMem_Realloc(oldbuf, bufsize);
+        if (buf == NULL) {
+            if (oldbuf != NULL)
+                PyMem_Free(oldbuf);
+            break;
+        }
+
 #if defined(PYOS_OS2) && defined(PYCC_GCC)
-    res = _getcwd2(buf, sizeof buf);
+        res = _getcwd2(buf, bufsize);
 #else
-    res = getcwd(buf, sizeof buf);
+        res = getcwd(buf, bufsize);
 #endif
+    } while ((res == NULL) && (errno == ERANGE));
     Py_END_ALLOW_THREADS
-    if (res == NULL)
+
+    if (buf == NULL)
+        return PyErr_NoMemory();
+    if (res == NULL) {
+        PyMem_Free(buf);
         return posix_error();
+    }
+
     if (use_bytes)
-        return PyBytes_FromStringAndSize(buf, strlen(buf));
-    return PyUnicode_DecodeFSDefault(buf);
+        path = PyBytes_FromStringAndSize(buf, strlen(buf));
+    else
+        path = PyUnicode_DecodeFSDefault(buf);
+    PyMem_Free(buf);
+    return path;
 }
 
 PyDoc_STRVAR(posix_getcwd__doc__,