subprocession: limit fd leaks

vcsserver/subprocessio.py

@@ -66,6 +66,7 b' class StreamFeeder(Thread):'
 
     def run(self):
         t = self.writeiface
+        try:
         if self.bytes:
             os.write(t, self.bytes)
         else:
@@ -74,6 +75,7 b' class StreamFeeder(Thread):'
             while b:
                 os.write(t, b)
                 b = s.read(4096)
+        finally:
         os.close(t)
 
     @property
@@ -436,6 +438,7 b' class SubprocessIOChunker(object):'
         self.process = _p
         self.output = bg_out
         self.error = bg_err
+        self.inputstream = inputstream
 
     def __iter__(self):
         return self
@@ -484,6 +487,10 b' class SubprocessIOChunker(object):'
             self.error.close()
         except:
             pass
+        try:
+            os.close(self.inputstream)
+        except:
+            pass
 
     def __del__(self):
         self.close()