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/*-
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 * Copyright (c) 1983, 1990, 1993
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 *        The Regents of the University of California.  All rights reserved.
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 * (c) UNIX System Laboratories, Inc.
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 * All or some portions of this file are derived from material licensed
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 * to the University of California by American Telephone and Telegraph
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 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
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 * the permission of UNIX System Laboratories, Inc.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 *        @(#)fcntl.h        8.3 (Berkeley) 1/21/94
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 */
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#ifndef _SYS_FCNTL_H_
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#define        _SYS_FCNTL_H_
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/*
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 * This file includes the definitions for open and fcntl
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 * described by POSIX for <fcntl.h>.
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 */
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#include <sys/types.h>
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/*
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 * File status flags: these are used by open(2), fcntl(2).
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 * They are also used (indirectly) in the kernel file structure f_flags,
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 * which is a superset of the open/fcntl flags.  Open flags and f_flags
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 * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags).
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 * Open/fcntl flags begin with O_; kernel-internal flags begin with F.
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 */
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/* open-only flags */
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#define        O_RDONLY        0x00000000        /* open for reading only */
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#define        O_WRONLY        0x00000001        /* open for writing only */
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#define        O_RDWR                0x00000002        /* open for reading and writing */
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#define        O_ACCMODE        0x00000003        /* mask for above modes */
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/*
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 * Kernel encoding of open mode; separate read and write bits that are
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 * independently testable: 1 greater than the above.
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 */
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#define        FREAD                0x00000001
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#define        FWRITE                0x00000002
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#define        O_NONBLOCK        0x00000004        /* no delay */
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#define        O_APPEND        0x00000008        /* set append mode */
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#define        O_SHLOCK        0x00000010        /* open with shared file lock */
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#define        O_EXLOCK        0x00000020        /* open with exclusive file lock */
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#define        O_ASYNC                0x00000040        /* signal pgrp when data ready */
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#define        O_SYNC                0x00000080        /* synchronous writes */
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#define        O_CREAT                0x00000200        /* create if nonexistent */
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#define        O_TRUNC                0x00000400        /* truncate to zero length */
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#define        O_EXCL                0x00000800        /* error if already exists */
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#define        FPIPE                0x00010000        /* pipe */
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/* defined by POSIX 1003.1; BSD default, so no bit required */
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#define        O_NOCTTY        0                /* don't assign controlling terminal */
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/* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE */
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#define        FFLAGS(oflags)        ((oflags) + 1)
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#define        OFLAGS(fflags)        ((fflags) - 1)
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/*
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 * Constants used for fcntl(2)
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 */
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/* command values */
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#define        F_DUPFD                0                /* duplicate file descriptor */
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#define        F_GETFD                1                /* get file descriptor flags */
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#define        F_SETFD                2                /* set file descriptor flags */
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#define        F_GETFL                3                /* get file status flags */
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#define        F_SETFL                4                /* set file status flags */
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#define        F_GETOWN        5                /* get SIGIO/SIGURG proc/pgrp */
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#define F_SETOWN        6                /* set SIGIO/SIGURG proc/pgrp */
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#define        F_GETLK                7                /* get record locking information */
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#define        F_SETLK                8                /* set record locking information */
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#define        F_SETLKW        9                /* F_SETLK; wait if blocked */
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/* file descriptor flags (F_GETFD, F_SETFD) */
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#define        FD_CLOEXEC        1                /* close-on-exec flag */
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/* record locking flags (F_GETLK, F_SETLK, F_SETLKW) */
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#define        F_RDLCK                1                /* shared or read lock */
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#define        F_UNLCK                2                /* unlock */
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#define        F_WRLCK                3                /* exclusive or write lock */
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/*
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 * Advisory file segment locking data type -
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 * information passed to system by user
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 */
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struct flock {
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        off_t        l_start;        /* starting offset */
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        off_t        l_len;                /* len = 0 means until end of file */
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        pid_t        l_pid;                /* lock owner */
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        short        l_type;                /* lock type: read/write, etc. */
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        short        l_whence;        /* type of l_start */
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};
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/* lock operations for flock(2) */
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#define        LOCK_SH                0x01                /* shared file lock */
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#define        LOCK_EX                0x02                /* exclusive file lock */
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#define        LOCK_NB                0x04                /* don't block when locking */
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#define        LOCK_UN                0x08                /* unlock file */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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int        open(const char *, int, ...);
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int        creat(const char *, mode_t);
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int        fcntl(int, int, ...);
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#if 0
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int        flock(int, int);
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#endif
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__END_DECLS
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#endif /* !_SYS_FCNTL_H_ */