1 files changed, 63 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/cluster/qpidd_watchdog.cpp b/qpid/cpp/src/qpid/cluster/qpidd_watchdog.cpp
new file mode 100644
index 0000000000..51c5ed4b3f
--- /dev/null
+++ b/qpid/cpp/src/qpid/cluster/qpidd_watchdog.cpp
@@ -0,0 +1,63 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+/** @file helper executable for WatchDogPlugin.cpp */
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <limits.h>
+
+long timeout;
+
+void killParent(int) {
+    ::kill(getppid(), SIGKILL);
+    ::fprintf(stderr, "Watchdog killed unresponsive broker, pid=%d\n", ::getppid());
+    ::exit(1);
+}
+
+void resetTimer(int) {
+    struct ::itimerval itval = { { 0, 0 }, { timeout, 0 } };
+    if (::setitimer(ITIMER_REAL, &itval, 0) !=0) {
+        ::perror("Watchdog failed to set timer");
+        killParent(0);
+        ::exit(1);
+    }
+}
+
+/** Simple watchdog program: kill parent process if timeout
+ * expires without a SIGUSR1.
+ * Will be killed with SIGHUP when parent shuts down.
+ * Args: timeout in seconds.
+ */
+int main(int argc, char** argv) {
+    if(argc != 2 || (timeout = atoi(argv[1])) == 0) {
+        ::fprintf(stderr, "Usage: %s <timeout_seconds>\n", argv[0]);
+        ::exit(1);
+    }
+    ::signal(SIGUSR1, resetTimer);
+    ::signal(SIGALRM, killParent);
+    resetTimer(0);
+    while (true) { sleep(INT_MAX); }
+}