From af10bf5e427df592f54362ca1047c5d1ca3e200d Mon Sep 17 00:00:00 2001
From: "Michael I. Bushnell" <mib@gnu.org>
Date: Fri, 21 Jul 1995 22:25:42 +0000
Subject: (ports_get_right): If the right is null (because we are closing
 down), then just return null.  (This helps in a race in ufs/ex2fs).

---
 libports/get-right.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'libports')

diff --git a/libports/get-right.c b/libports/get-right.c
index dd7f5b6a..308123a3 100644
--- a/libports/get-right.c
+++ b/libports/get-right.c
@@ -29,7 +29,13 @@ ports_get_right (void *port)
   mach_port_t foo;
   
   mutex_lock (&_ports_lock);
-  
+
+  if (pi->port_right == MACH_PORT_NULL)
+    {
+      mutex_unlock (&_ports_lock);
+      return MACH_PORT_NULL;
+    }
+      
   pi->mscount++;
   if ((pi->flags & PORT_HAS_SENDRIGHTS) == 0)
     {
-- 
cgit v1.2.3