--- py3k/Lib/subprocess.py	2010-12-10 20:09:56.000000000 +0200
+++ py3k-subprocess/Lib/subprocess.py	2010-12-10 21:34:43.000000000 +0200
@@ -1262,10 +1262,13 @@
                     os.close(errpipe_write)
 
                 if p2cread != -1 and p2cwrite != -1:
+                    self._set_cloexec_flag(p2cwrite)
                     os.close(p2cread)
                 if c2pwrite != -1 and c2pread != -1:
+                    self._set_cloexec_flag(c2pread)
                     os.close(c2pwrite)
                 if errwrite != -1 and errread != -1:
+                    self._set_cloexec_flag(errread)
                     os.close(errwrite)
 
                 # Wait for exec to fail or succeed; possibly raising an