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/* O_*, F_*, FD_* bit values for Linux.
   Copyright (C) 1995, 1996, 1997, 1998 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _FCNTL_H
# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
#endif


#include <sys/types.h>

/* open/fcntl - O_SYNC is only implemented on blocks devices and on files
   located on an ext2 file system */
#define O_ACCMODE         0003
#define O_RDONLY            00
#define O_WRONLY            01
#define O_RDWR              02
#define O_CREAT           0100  /* not fcntl */
#define O_EXCL            0200  /* not fcntl */
#define O_NOCTTY          0400  /* not fcntl */
#define O_TRUNC          01000  /* not fcntl */
#define O_APPEND         02000
#define O_NONBLOCK       04000
#define O_NDELAY        O_NONBLOCK
#define O_SYNC          010000
#define O_FSYNC         O_SYNC
#define O_ASYNC         020000

#ifdef __USE_GNU
# define O_DIRECTORY    040000  /* Must be a directory.  */
# define O_NOFOLLOW     0100000 /* Do not follow links.  */
#endif

/* XXX missing */
#ifdef __USE_LARGEFILE64
# define O_LARGEFILE    0
#endif

/* For now Linux has synchronisity options for data and read operations.
   We define the symbols here but let them do the same as O_SYNC since
   this is a superset.  */
#if defined __USE_POSIX199309 || defined __USE_UNIX98
# define O_DSYNC        O_SYNC  /* Synchronize data.  */
# define O_RSYNC        O_SYNC  /* Synchronize read operations.  */
#endif

/* Values for the second argument to `fcntl'.  */
#define F_DUPFD         0       /* Duplicate file descriptor.  */
#define F_GETFD         1       /* Get file descriptor flags.  */
#define F_SETFD         2       /* Set file descriptor flags.  */
#define F_GETFL         3       /* Get file status flags.  */
#define F_SETFL         4       /* Set file status flags.  */
#define F_GETLK         5       /* Get record locking info.  */
#define F_SETLK         6       /* Set record locking info (non-blocking).  */
#define F_SETLKW        7       /* Set record locking info (blocking).  */

/* XXX missing */
#define F_GETLK64       5       /* Get record locking info.  */
#define F_SETLK64       6       /* Set record locking info (non-blocking).  */
#define F_SETLKW64      7       /* Set record locking info (blocking).  */

#ifdef __USE_BSD
# define F_SETOWN       8       /* Get owner of socket (receiver of SIGIO).  */
# define F_GETOWN       9       /* Set owner of socket (receiver of SIGIO).  */
#endif

#ifdef __USE_GNU
# define F_SETSIG       10      /* Set number of signal to be sent.  */
# define F_GETSIG       11      /* Get number of signal to be sent.  */
#endif

/* For F_[GET|SET]FL.  */
#define FD_CLOEXEC      1       /* actually anything with low bit set goes */

/* For posix fcntl() and `l_type' field of a `struct flock' for lockf().  */
#define F_RDLCK         0       /* Read lock.  */
#define F_WRLCK         1       /* Write lock.  */
#define F_UNLCK         2       /* Remove lock.  */

/* for old implementation of bsd flock () */
#define F_EXLCK         4       /* or 3 */
#define F_SHLCK         8       /* or 4 */

#ifdef __USE_BSD
/* Operations for bsd flock(), also used by the kernel implementation */
# define LOCK_SH        1       /* shared lock */
# define LOCK_EX        2       /* exclusive lock */
# define LOCK_NB        4       /* or'd with one of the above to prevent
                                   blocking */
# define LOCK_UN        8       /* remove lock */
#endif

struct flock
  {
    short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
    short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
#ifndef __USE_FILE_OFFSET64
    __off_t l_start;    /* Offset where the lock begins.  */
    __off_t l_len;      /* Size of the locked area; zero means until EOF.  */
#else
    __off64_t l_start;  /* Offset where the lock begins.  */
    __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
#endif
    __pid_t l_pid;      /* Process holding the lock.  */
  };

#ifdef __USE_LARGEFILE64
struct flock64
  {
    short int l_type;   /* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
    short int l_whence; /* Where `l_start' is relative to (like `lseek').  */
    __off64_t l_start;  /* Offset where the lock begins.  */
    __off64_t l_len;    /* Size of the locked area; zero means until EOF.  */
    __pid_t l_pid;      /* Process holding the lock.  */
  };
#endif

/* Define some more compatibility macros to be backward compatible with
   BSD systems which did not managed to hide these kernel macros.  */
#ifdef  __USE_BSD
# define FAPPEND        O_APPEND
# define FFSYNC         O_FSYNC
# define FASYNC         O_ASYNC
# define FNONBLOCK      O_NONBLOCK
# define FNDELAY        O_NDELAY
#endif /* Use BSD.  */