This is patch

[ 559250 ] more POSIX signal stuff

Adds support (and docs and tests and autoconfery) for posix signal
mask handling -- sigpending, sigprocmask and sigsuspend.

1 files changed, 65 insertions, 3 deletions

diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index 05bdcab..78b90b7 100644
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -1,8 +1,7 @@
 # Test the signal module
-from test_support import verbose, TestSkipped
+from test_support import verbose, TestSkipped, TestFailed
 import signal
-import os
-import sys
+import os, sys, time
 
 if sys.platform[:3] in ('win', 'os2') or sys.platform=='riscos':
     raise TestSkipped, "Can't test signal on %s" % sys.platform
@@ -64,3 +63,66 @@ try:
 except KeyboardInterrupt:
     if verbose:
         print "KeyboardInterrupt (assume the alarm() went off)"
+
+
+if hasattr(signal, "sigprocmask"):
+    class HupDelivered(Exception):
+        pass
+    def hup(signum, frame):
+        raise HupDelivered
+    def hup2(signum, frame):
+        signal.signal(signal.SIGHUP, hup)
+        return
+    signal.signal(signal.SIGHUP, hup)
+
+    if verbose:
+        print "blocking SIGHUP"
+
+    defaultmask = signal.sigprocmask(signal.SIG_BLOCK, [signal.SIGHUP])
+
+    if verbose:
+        print "sending SIGHUP"
+
+    try:
+        os.kill(pid, signal.SIGHUP)
+    except HupDelivered:
+        raise TestFailed, "HUP not blocked"
+
+    if signal.SIGHUP not in signal.sigpending():
+        raise TestFailed, "HUP not pending"
+
+    if verbose:
+        print "unblocking SIGHUP"
+
+    try:
+        signal.sigprocmask(signal.SIG_UNBLOCK, [signal.SIGHUP])
+    except HupDelivered:
+        pass
+    else:
+        raise TestFailed, "HUP not delivered"
+
+    if verbose:
+        print "testing sigsuspend"
+
+    signal.sigprocmask(signal.SIG_BLOCK, [signal.SIGHUP])
+    signal.signal(signal.SIGHUP, hup2)
+
+    if not os.fork():
+        time.sleep(2)
+        os.kill(pid, signal.SIGHUP)
+        time.sleep(2)
+        os.kill(pid, signal.SIGHUP)
+        os._exit(0)
+    else:
+        try:
+            signal.sigsuspend(defaultmask)
+        except:
+            raise TestFailed, "sigsuspend erroneously raised"
+
+        try:
+            signal.sigsuspend(defaultmask)
+        except HupDelivered:
+            pass
+        else:
+            raise TestFailed, "sigsupsend didn't raise"
+