server: Explicitly shutdown closed pipes to prevent access from file descriptors…

dlls/ntdll/file.c

@@ -282,7 +282,7 @@ NTSTATUS FILE_GetNtStatus(void)
     case ENFILE:    return STATUS_TOO_MANY_OPENED_FILES;
     case EINVAL:    return STATUS_INVALID_PARAMETER;
     case ENOTEMPTY: return STATUS_DIRECTORY_NOT_EMPTY;
-    case EPIPE:     return STATUS_PIPE_BROKEN;
+    case EPIPE:     return STATUS_PIPE_DISCONNECTED;
     case EIO:       return STATUS_DEVICE_NOT_READY;
 #ifdef ENOMEDIUM
     case ENOMEDIUM: return STATUS_NO_MEDIA_IN_DEVICE;

server/mailslot.c

@@ -197,6 +197,7 @@ static void mailslot_destroy( struct object *obj)
     assert( mailslot->fd );
     assert( mailslot->write_fd );
 
+    shutdown( get_unix_fd( mailslot->fd ), SHUT_RDWR );
     release_object( mailslot->fd );
     release_object( mailslot->write_fd );
 }
@@ -408,6 +409,7 @@ static struct mailslot *create_mailslot( struct directory *root,
     {
         fcntl( fds[0], F_SETFL, O_NONBLOCK );
         fcntl( fds[1], F_SETFL, O_NONBLOCK );
+        shutdown( fds[0], SHUT_RD );
         mailslot->fd = create_anonymous_fd( &mailslot_fd_ops,
                                 fds[1], &mailslot->obj );
         mailslot->write_fd = create_anonymous_fd( &mail_writer_fd_ops,

server/named_pipe.c

@@ -338,6 +338,7 @@ static void do_disconnect( struct pipe_server *server )
         server->client->fd = NULL;
     }
     assert( server->fd );
+    shutdown( get_unix_fd( server->fd ), SHUT_RDWR );
     release_object( server->fd );
     server->fd = NULL;
 }