--- py3k/Lib/subprocess.py	2009-07-22 10:49:55.000000000 +0800
+++ py3k/Lib/subprocess.py.new	2009-07-24 15:38:22.000000000 +0800
@@ -585,7 +585,7 @@ class Popen(object):
                  stdin=None, stdout=None, stderr=None,
                  preexec_fn=None, close_fds=False, shell=False,
                  cwd=None, env=None, universal_newlines=False,
-                 startupinfo=None, creationflags=0):
+                 startupinfo=None, creationflags=0, pass_fds=()):
         """Create new Popen instance."""
         _cleanup()
 
@@ -639,7 +639,7 @@ class Popen(object):
          errread, errwrite) = self._get_handles(stdin, stdout, stderr)
 
         self._execute_child(args, executable, preexec_fn, close_fds,
-                            cwd, env, universal_newlines,
+                            pass_fds, cwd, env, universal_newlines,
                             startupinfo, creationflags, shell,
                             p2cread, p2cwrite,
                             c2pread, c2pwrite,
@@ -804,7 +804,7 @@ class Popen(object):
 
 
         def _execute_child(self, args, executable, preexec_fn, close_fds,
-                           cwd, env, universal_newlines,
+                           pass_fds, cwd, env, universal_newlines,
                            startupinfo, creationflags, shell,
                            p2cread, p2cwrite,
                            c2pread, c2pwrite,
@@ -1013,13 +1013,18 @@ class Popen(object):
             fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag)
 
 
-        def _close_fds(self, but):
-            os.closerange(3, but)
-            os.closerange(but + 1, MAXFD)
+        def _close_fds(self, pass_fds):
+            for i in range(3, MAXFD):
+                if i in pass_fds:
+                    continue
+                try:
+                    os.close(i)
+                except:
+                    pass
 
 
         def _execute_child(self, args, executable, preexec_fn, close_fds,
-                           cwd, env, universal_newlines,
+                           pass_fds, cwd, env, universal_newlines,
                            startupinfo, creationflags, shell,
                            p2cread, p2cwrite,
                            c2pread, c2pwrite,
@@ -1089,7 +1094,7 @@ class Popen(object):
 
                             # Close all other fds, if asked for
                             if close_fds:
-                                self._close_fds(but=errpipe_write)
+                                self._close_fds(pass_fds+(errpipe_write,))
 
                             if cwd is not None:
                                 os.chdir(cwd)