/usr/include/wvstreams/wvlockfile.h is in libwvstreams-dev 4.6.1-7.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | /* -*- Mode: C++ -*-
* Worldvisions Weaver Software:
* Copyright (C) 1997-2002 Net Integration Technologies, Inc.
*
* A simple lockfile class using WvStreams.
*/
#ifndef __WVLOCKFILE_H
#define __WVLOCKFILE_H
#include "wvfile.h"
class WvLockFile
{
public:
WvLockFile(WvStringParm _lockname);
/** Check to make sure no lock is established or that it's owned by us. */
bool isok();
/** Creates the lockfile with the current pid. Returns success/failure. */
bool lock();
/**
* Removes the lockfile if present. If there's no lockfile after,
* returns true, otherwise false.
*/
bool unlock();
/**
* Returns one of three things:
* -1 if the lockfile exists, but is inaccessible.
* 0 if there is no lockfile, or the process is not running.
* >0 The pid of the known-running process that owns the lock.
*/
pid_t readpid();
protected:
WvString lockname;
};
#endif // __WVLOCKFILE_H
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