QPID-4147: made selector handle interrupt based on patch from siddesh

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk/qpid@1367354 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 30 insertions, 6 deletions

diff --git a/python/qpid/selector.py b/python/qpid/selector.py
index ca5946c3f9..ff94091da0 100644
--- a/python/qpid/selector.py
+++ b/python/qpid/selector.py
@@ -16,7 +16,7 @@
 # specific language governing permissions and limitations
 # under the License.
 #
-import atexit, time
+import atexit, time, errno
 from compat import select, set, selectable_waiter
 from threading import Thread, Lock
 
@@ -111,12 +111,24 @@ class Selector:
           else:
             wakeup = min(wakeup, t)
 
-      if wakeup is None:
-        timeout = None
-      else:
-        timeout = max(0, wakeup - time.time())
+      rd = []
+      wr = []
+      ex = []
 
-      rd, wr, ex = select(self.reading, self.writing, (), timeout)
+      while True:
+        try:
+          if wakeup is None:
+            timeout = None
+          else:
+            timeout = max(0, wakeup - time.time())
+          rd, wr, ex = select(self.reading, self.writing, (), timeout)
+          break
+        except Exception, (err, strerror):
+          # Repeat the select call if we were interrupted.
+          if err == errno.EINTR:
+            continue
+          else:
+            raise
 
       for sel in wr:
         if sel.writing():
diff --git a/python/qpid/tests/messaging/endpoints.py b/python/qpid/tests/messaging/endpoints.py
index 62deacd0bd..a82a9e95ed 100644
--- a/python/qpid/tests/messaging/endpoints.py
+++ b/python/qpid/tests/messaging/endpoints.py
@@ -1333,3 +1333,15 @@ class SenderTests(Base):
     self.drain(self.rcv, expected=msgs)
     self.ssn.acknowledge()
     assert caught, "did not exceed capacity"
+
+  def testEINTR(self):
+    m1 = self.content("testEINTR", 0)
+    m2 = self.content("testEINTR", 1)
+
+    self.snd.send(m1, timeout=self.timeout())
+    try:
+      os.setuid(500)
+      assert False, "setuid should fail"
+    except:
+      pass
+    self.snd.send(m2, timeout=self.timeout())