/usr/include/kannel/gw/heartbeat.h is in kannel-dev 1.4.4-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* The Kannel Software License, Version 1.0
*
* Copyright (c) 2001-2014 Kannel Group
* Copyright (c) 1998-2001 WapIT Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Kannel Group (http://www.kannel.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Kannel" and "Kannel Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please
* contact org@kannel.org.
*
* 5. Products derived from this software may not be called "Kannel",
* nor may "Kannel" appear in their name, without prior written
* permission of the Kannel Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE KANNEL GROUP OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Kannel Group. For more information on
* the Kannel Group, please see <http://www.kannel.org/>.
*
* Portions of this software are based upon software originally written at
* WapIT Ltd., Helsinki, Finland for the Kannel project.
*/
/*
* heartbeat.h - thread for sending heartbeat Msgs to bearerbox
*/
#ifndef HEARTBEAT_H
#define HEARTBEAT_H
#include "gwlib/gwlib.h"
#include "msg.h"
#define DEFAULT_HEARTBEAT 30
#define ALL_HEARTBEATS -1
/*
* Signature for a function that returns the current load value.
*/
typedef long hb_load_func_t(void);
/*
* Signature for a function that takes the heartbeat msg and does
* something with it.
*/
typedef void hb_send_func_t(Msg *hb);
/*
* Start a thread that produces Msgs of type heartbeat on the msgs list.
* The speed is approximately one per freq seconds.
* The function load_func will be called to determine what should be
* filled in for the load parameter.
* Return the thread number. Return -1 if the operation failed.
*/
long heartbeat_start(hb_send_func_t *send_func, double freq,
hb_load_func_t *load_func);
/*
* Stop the indicated heartbeat thread.
*/
void heartbeat_stop(long hb_thread);
#endif
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