From 49c32d49079d60d8a85c5801993a6ad35022eb93 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Fri, 13 Dec 2013 18:58:17 +1100
Subject: [PATCH] Dnotify: possible fix for multiple signals.

I seem to lose signals sometimes.
This catches signals while handling signals and serialised them.
---
 lib/dnotify.py | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/lib/dnotify.py b/lib/dnotify.py
index 8ec6cb8..9ba360f 100644
--- a/lib/dnotify.py
+++ b/lib/dnotify.py
@@ -28,11 +28,22 @@
 import os, fcntl, signal
 
 dirlist = []
+active = False
+again = False
 def notified(sig, stack):
-    for d in dirlist:
-        fcntl.fcntl(d.fd, fcntl.F_NOTIFY, (fcntl.DN_MODIFY|fcntl.DN_RENAME|
-                                           fcntl.DN_CREATE|fcntl.DN_DELETE))
-        d.check()
+    global active, again
+    if active:
+        again = True
+        return
+    again = True
+    while again:
+        active = True
+        again = False
+        for d in dirlist:
+            fcntl.fcntl(d.fd, fcntl.F_NOTIFY, (fcntl.DN_MODIFY|fcntl.DN_RENAME|
+                                               fcntl.DN_CREATE|fcntl.DN_DELETE))
+            d.check()
+        active = False
 
 class dir():
     def __init__(self, dname):
@@ -49,6 +60,7 @@ class dir():
     def watch(self, fname, callback):
         f = file(os.path.join(self.dname, fname), callback)
         self.files.append(f)
+        f.check()
         return f
 
     def watchall(self, callback):
-- 
2.39.5