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/* O_*, F_*, FD_* bit values for Linux.

   Copyright (C) 2000 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 _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.  */

# define O_DIRECT       0200000 /* Direct disk access.  */

# define O_STREAMING    04000000/* streaming access */

#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

#ifdef __USE_LARGEFILE64

# define O_LARGEFILE    0400000

#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.  */

#ifndef __USE_FILE_OFFSET64

# 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).  */

#else

# define F_GETLK        F_GETLK64  /* Get record locking info.  */

# define F_SETLK        F_SETLK64  /* Set record locking info (non-blocking).*/

# define F_SETLKW       F_SETLKW64 /* Set record locking info (blocking).  */

#endif

#define F_GETLK64       12      /* Get record locking info.  */

#define F_SETLK64       13      /* Set record locking info (non-blocking).  */

#define F_SETLKW64      14      /* Set record locking info (blocking).  */

#if defined __USE_BSD || defined __USE_XOPEN2K

# 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

#ifdef __USE_GNU

# define F_SETLEASE     1024    /* Set a lease.  */

# define F_GETLEASE     1025    /* Enquire what lease is active.  */

# define F_NOTIFY       1026    /* Request notfications on a directory.  */

#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

#ifdef __USE_GNU

# define LOCK_MAND      32      /* This is a mandatory flock:   */

# define LOCK_READ      64      /* ... which allows concurrent read operations.  */

# define LOCK_WRITE     128     /* ... which allows concurrent write operations.  */

# define LOCK_RW        192     /* ... Which allows concurrent read & write operations.  */

#endif

#ifdef __USE_GNU

/* Types of directory notifications that may be requested with F_NOTIFY.  */

# define DN_ACCESS      0x00000001      /* File accessed.  */

# define DN_MODIFY      0x00000002      /* File modified.  */

# define DN_CREATE      0x00000004      /* File created.  */

# define DN_DELETE      0x00000008      /* File removed.  */

# define DN_RENAME      0x00000010      /* File renamed.  */

# define DN_ATTRIB      0x00000020      /* File changed attibutes.  */

# define DN_MULTISHOT   0x80000000      /* Don't remove notifier.  */

#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.  */

/* Advise to `posix_fadvise'.  */

#ifdef __USE_XOPEN2K

# define POSIX_FADV_NORMAL      0 /* No further special treatment.  */

# define POSIX_FADV_RANDOM      1 /* Expect random page references.  */

# define POSIX_FADV_SEQUENTIAL  2 /* Expect sequential page references.  */

# define POSIX_FADV_WILLNEED    3 /* Will need these pages.  */

# define POSIX_FADV_DONTNEED    4 /* Don't need these pages.  */

# define POSIX_FADV_NOREUSE     5 /* Data will be accessed once.  */

#endif