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/* ========================================================================
* Copyright 1988-2006 University of Washington
*
* 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
*
*
* ========================================================================
*/
/*
* Program: flock() emulation via fcntl() locking
*
* Author: Mark Crispin
* Networks and Distributed Computing
* Computing & Communications
* University of Washington
* Administration Building, AG-44
* Seattle, WA 98195
* Internet: MRC@CAC.Washington.EDU
*
* Date: 10 April 2001
* Last Edited: 30 August 2006
*/
/* Cygwin does not seem to have the design flaw in fcntl() locking that
* most other systems do (see flocksim.c for details). If some cretin
* decides to implement that design flaw, then Cygwin will have to use
* flocksim. Also, we don't test NFS either
*/
#define flock flocksim /* use ours instead of theirs */
#undef LOCK_SH
#define LOCK_SH 1 /* shared lock */
#undef LOCK_EX
#define LOCK_EX 2 /* exclusive lock */
#undef LOCK_NB
#define LOCK_NB 4 /* no blocking */
#undef LOCK_UN
#define LOCK_UN 8 /* unlock */
/* Function prototypes */
int flocksim (int fd,int operation);