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/* 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  */