From b16914a34d89e4b99eceb0a3f5b277d454c4e39f Mon Sep 17 00:00:00 2001
From: Alan Conway <aconway@apache.org>
Date: Mon, 30 Apr 2007 18:08:17 +0000
Subject: * README: added new dependency, libdaemon. * qpidc.spec.in: libdaemon
 dependencies. * broker/Daemon.h|cpp: Daemon and pid file management, wrapper
 for libdaemon. * qpidd.cpp modifid flags   -d [ --daemon ] - waits till
 deamon is listening before returning. * qpidd.cpp: new flags   -q [ --quit ] 
                    Stop the running daemon politely.   -k [ --kill ]         
            Kill the running daemon harshly.   -c [ --check ]                 
   If daemon is running return 0.   --wait SECONDS (=10)              Maximum
 wait for daemon response.   --ppid                            Print daemon
 pid to stdout * tests/dameon_test: Test daemon startup, shutdown. * deleted
 tests/broker: obsolete script.

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/branches/M2@533819 13f79535-47bb-0310-9956-ffa450edef68
---
 cpp/lib/broker/Daemon.h | 91 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 cpp/lib/broker/Daemon.h

(limited to 'cpp/lib/broker/Daemon.h')

diff --git a/cpp/lib/broker/Daemon.h b/cpp/lib/broker/Daemon.h
new file mode 100644
index 0000000000..cf9bf13764
--- /dev/null
+++ b/cpp/lib/broker/Daemon.h
@@ -0,0 +1,91 @@
+#ifndef _broker_Daemon_h
+#define _broker_Daemon_h
+
+/*
+ *
+ * Copyright (c) 2006 The Apache Software Foundation
+ *
+ * Licensed 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.
+ *
+ */
+
+#include <string>
+#include <boost/scoped_ptr.hpp>
+
+namespace qpid {
+namespace broker {
+
+/**
+ * Tools for forking and managing a daemon process.
+ * NB: Only one Daemon instance is allowed in a process.
+ */
+class Daemon
+{
+  public:
+
+    /** Extract the daemon's name from argv[0] */
+    static std::string nameFromArgv0(const char* argv0);
+    
+    /**
+     * Creating a Daemon instance forks a daemon process.
+     *@param name used to create pid files etc.
+     *@param timeout in seconds for all operations that wait.
+     */
+    Daemon(const std::string& name, int timeout);
+
+    ~Daemon();
+    
+    /** Fork the daemon, wait till it signals readiness */
+    pid_t fork();
+
+    /** Child only, send ready signal so parent fork() will return. */
+    void ready();
+    
+    /** Child only, send failed signal so parent fork() will throw. */
+    void failed();
+    
+    /** Kill the daemon with SIGINT. */
+    void quit();
+    
+    /** Kill the daemon with SIGKILL. */
+    void kill();
+
+    /** Check daemon is running, throw exception if not */
+    pid_t check();
+
+    bool isParent() { return pid > 0; }
+
+    bool isChild() { return pid == 0; }
+    
+    std::string getName() const { return name; }
+
+    pid_t getPid() const {return pid; }
+
+  private:
+    class Retval;
+
+    void notify(int);
+    
+    static std::string name;
+    static std::string pidFile;
+    static const char* getPidFile();
+    boost::scoped_ptr<Retval> retval;
+    pid_t pid;
+    int timeout;
+};
+
+}} // namespace qpid::broker
+
+
+
+#endif  /*!_broker_Daemon_h*/
-- 
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