/* Copyright (C) 1991, 92, 96, 97, 98, 99 Free Software Foundation, Inc.   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#ifndef	_SYS_FILE_H#define	_SYS_FILE_H	1#include <features.h>#ifndef	_FCNTL_H# include <fcntl.h>#endif__BEGIN_DECLS/* Alternate names for values for the WHENCE argument to `lseek'.   These are the same as SEEK_SET, SEEK_CUR, and SEEK_END, respectively.  */#ifndef L_SET# define L_SET	0	/* Seek from beginning of file.  */# define L_INCR	1	/* Seek from current position.  */# define L_XTND	2	/* Seek from end of file.  */#endif/* Operations for the `flock' call.  */#define	LOCK_SH	1	/* Shared lock.  */#define	LOCK_EX	2 	/* Exclusive lock.  */#define	LOCK_UN	8	/* Unlock.  *//* Can be OR'd in to one of the above.  */#define	LOCK_NB	4	/* Don't block when locking.  *//* Apply or remove an advisory lock, according to OPERATION,   on the file FD refers to.  */extern int flock (int __fd, int __operation) __THROW;__END_DECLS#endif /* sys/file.h  */