/usr/include/log4cplus/helpers/lockfile.h is in liblog4cplus-dev 1.1.2-3.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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//
// Copyright (C) 2012-2013, Vaclav Zeman. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modifica-
// tion, 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.
//
// 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
// APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
// DING, 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.
#if ! defined (LOG4CPLUS_HELPERS_LOCKFILE_H)
#define LOG4CPLUS_HELPERS_LOCKFILE_H
#include <log4cplus/config.hxx>
#if defined (LOG4CPLUS_HAVE_PRAGMA_ONCE)
#pragma once
#endif
#include <log4cplus/tstring.h>
#include <log4cplus/thread/syncprims.h>
namespace log4cplus { namespace helpers {
class LOG4CPLUS_EXPORT LockFile
{
public:
LockFile (tstring const & lock_file);
~LockFile ();
void lock () const;
void unlock () const;
private:
void open (int) const;
void close () const;
struct Impl;
tstring lock_file_name;
Impl * data;
};
typedef log4cplus::thread::SyncGuard<LockFile> LockFileGuard;
} } // namespace log4cplus { namespace helpers {
#endif // LOG4CPLUS_HELPERS_LOCKFILE_H
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