Removed the know unnecessary BSD-like fcntl.h (a BeOS one is now in posix/)
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@582 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
@@ -1,341 +0,0 @@
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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/**
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* @file fcntl.h
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* @brief File Control functions and definitions
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*/
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#ifndef _FCNTL_H_
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#define _FCNTL_H_
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/**
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* @defgroup Fcntl fcntl.h
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* @brief File Control functions and definitions
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* @note Definitions in this file also apply to open() and
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* internally in the kernel
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* @note Relevant kernel functions should be here as well
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* @ingroup OpenBeOS_POSIX
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* @{
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*/
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#ifndef _KERNEL_
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//#include <sys/types.h>
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#endif
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/**
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* @defgroup File_Status_Flags File Status Flags
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* The flags described in this section are used by fcntl(), open() and also
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* withing the kernel.
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* @note O_ are used by fcntl() and open()
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* @note F flags are used by the kernel
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* @ingroup fcntl
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* @{
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*/
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/** open for reading only */
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#define O_RDONLY 0x0000
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/** open for writing only */
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#define O_WRONLY 0x0001
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/** open for reading and writing */
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#define O_RDWR 0x0002
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/** mask for above modes */
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#define O_ACCMODE 0x0003
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#ifndef _POSIX_SOURCE
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/** kernel flag to allow testing of read/write directly
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* @note not #ifdef _KERNEL_ to allow TIOCFLUSH to work */
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#define FREAD 0x0001
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/** kernel flag to allow testing of read/write directly
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* @note not #ifdef _KERNEL_ to allow TIOCFLUSH to work */
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#define FWRITE 0x0002
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#endif
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/** no delay */
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#define O_NONBLOCK 0x0004
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/** set append mode */
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#define O_APPEND 0x0008
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/** open with shared file lock */
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#define O_SHLOCK 0x0010
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/** open with exclusive file lock */
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#define O_EXLOCK 0x0020
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/** signal pgrp when data ready */
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#define O_ASYNC 0x0040
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/** backwards compatibility */
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#define O_FSYNC O_SYNC
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/** if path is a symlink, don't follow */
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#define O_NOFOLLOW 0x0100
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/** synchronous writes */
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#define O_SYNC 0x0080
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/** create if nonexistant */
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#define O_CREAT 0x0200
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/** truncate to zero length */
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#define O_TRUNC 0x0400
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/** error if already exists */
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#define O_EXCL 0x0800
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#ifdef _KERNEL_
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/* mark during gc() */
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#define FMARK 0x1000
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/* defer for next gc pass */
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#define FDEFER 0x2000
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/* descriptor holds advisory lock */
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#define FHASLOCK 0x4000
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#endif
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/*
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* POSIX 1003.1 specifies a higher granularity for syncronous operations
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* than are currently supported. We may want to look at what needs to be done
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* to support these. At present just map them.
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*/
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/** @def O_DSYNC synchronous data writes */
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#define O_DSYNC O_SYNC
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/** @def O_RSYNC synchronous reads */
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#define O_RSYNC O_SYNC
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/* defined by POSIX 1003.1; BSD default, this bit is not required */
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/** @def O_NOCTTY don't assign controlling terminal */
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#define O_NOCTTY 0x8000
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#ifdef _KERNEL_
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/*
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* convert from open() flags to/from fflags; convert O_RD/WR to FREAD/FWRITE.
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* For out-of-range values for the flags, be slightly careful (but lossy).
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*/
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/** @def FFLAGS(oflags) Convert from O_ flags to F flags for kernel */
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#define FFLAGS(oflags) (((oflags) & ~O_ACCMODE) | (((oflags) + 1) & O_ACCMODE))
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/** @def OFLAGS(fflags) Convert from F flags to O_ flags for open() */
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#define OFLAGS(fflags) (((fflags) & ~O_ACCMODE) | (((fflags) - 1) & O_ACCMODE))
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/** @def FMASK bits to save after open */
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#define FMASK (FREAD|FWRITE|FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
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/** @def FCNTLFLAGS bits settable by fcntl(F_SETFL, ...) */
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#define FCNTLFLAGS (FAPPEND|FASYNC|FFSYNC|FNONBLOCK)
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#endif
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/*
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* The O_* flags used to have only F* names, which were used in the kernel
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* and by fcntl. We retain the F* names for the kernel f_flags field
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* and for backward compatibility for fcntl.
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*/
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#ifndef _POSIX_SOURCE
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/** kernel/compat */
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#define FAPPEND O_APPEND
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/** kernel/compat */
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#define FASYNC O_ASYNC
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/** kernel */
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#define FFSYNC O_SYNC
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/** kernel */
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#define FNONBLOCK O_NONBLOCK
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/** compat */
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#define FNDELAY O_NONBLOCK
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/** compat */
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#define O_NDELAY O_NONBLOCK
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#endif
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/** @} */
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/**
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* @defgroup FCNTL_Flags Flags used for fcntl()
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* @ingroup FCNTL
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* @{
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*/
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/**
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* @def F_DUPFD Return a new file descriptor that has
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* @li the lowest number available (>= fd used)
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* @li same object references as original fd
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* @li same offsets as original (file only)
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* @li same file status
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* @li close-on-exec flag is set so it will remain open across execv()
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*
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* @ref FD_CLOEXEC
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*/
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#define F_DUPFD 0 /* duplicate file descriptor */
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/** @def F_GETFD Get the close-on-exec flag for the fd
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* @note the argument is ignored
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* @ref FD_CLOEXEC */
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#define F_GETFD 1
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/** @def F_SETFD Set the close-on-exec flag for the fd
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* @ref FD_CLOEXEC */
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#define F_SETFD 2
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/** @def F_GETFL Get fd status flags */
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#define F_GETFL 3
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/** @def F_SETFL Set the fd status flags */
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#define F_SETFL 4
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/** @def F_GETOWN Get the process ID receiving SIGIO/SIGURG signals */
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#define F_GETOWN 5
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/** @def F_SETOWN Set the process ID receiving SIGIO/SIGURG signals */
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#define F_SETOWN 6
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/** @def F_GETLK Get the first lock that blocks the requested lock requested
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* int the flock structure passed in.
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* @li If the call succeeds then the structure is returned unaltered except
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* the lock type is set to F_UNLCK
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* @li If the call fails the details of the blocking lock will be inserted
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* into the strcture, overwriting the details submitted.
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*/
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#define F_GETLK 7
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/** @def F_SETLK Set/Clear a file segment lock based on the flock structure
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* passed in.
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* @note If a shared/exclusive lock cannot be set, EAGAIN will be returned
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*/
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#define F_SETLK 8
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/** @def F_SETLKW Same as F_SETLK but will block if a shared/exclusive
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* lock is requested and is not available.
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*/
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#define F_SETLKW 9
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/* file descriptor flags (F_GETFD, F_SETFD) */
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/** @def FD_CLOEXEC Flag set in status is fd is set to remain open
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* across exec
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* @ref F_DUPFD
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* @ref F_GETFD
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* @ref F_SETFD
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*/
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#define FD_CLOEXEC 1 /* close-on-exec flag */
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/** @} */
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/**
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* @defgroup FCNTL_FileLocks Locking types for fcntl()
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* @ingroup FCNTL
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* @{
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*/
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/** shared or read lock */
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#define F_RDLCK 1
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/** unlock */
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#define F_UNLCK 2
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/** exclusive or write lock */
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#define F_WRLCK 3
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#ifdef _KERNEL_
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/** Wait until lock is granted */
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#define F_WAIT 0x010
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/** Use flock(2) semantics for lock */
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#define F_FLOCK 0x020
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/** Use POSIX semantics for lock */
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#define F_POSIX 0x040
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#endif
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/** @} */
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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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* @note This structure can be used to lock all or part of a file
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* @note Not yet implemented in OpenBeOS
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*/
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struct flock {
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/** starting offset for lock */
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off_t l_start;
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/** length of lock required (0 means lock to end of file) */
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off_t l_len;
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/** process id of process owning lock */
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pid_t l_pid;
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/** type of lock
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* @link FCNTL_FileLocks */
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short l_type;
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/** type of start poition given */
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short l_whence;
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};
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/**
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* @defgroup FCNTL_flock Locking types for flock()
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* @ingroup FCNTL
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* @{
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*/
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/** shared lock */
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#define LOCK_SH 0x01
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/** exclusive lock */
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#define LOCK_EX 0x02
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/** don't block when locking */
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#define LOCK_NB 0x04
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/** unlock */
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#define LOCK_UN 0x08
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/** @} */
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#ifndef _KERNEL_MODE
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//#include <sys/cdefs.h>
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#include <ktypes.h>
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/** @fn int open(const char *path, int oflags, ...);
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* Used to open or create a file for reading/writing
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* @note oflags passed should be OR'd together, e.g.
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* @code
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* int fd = open("file.txt", O_RDWR | O_APPEND | O_CREAT);
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* @endcode
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* @note if the flag O_CREAT is supplied and the file given by path doesn't
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* exist it will be created.
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*
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* @ref File_Status_Flags
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*/
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int open (const char *, int, ...);
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/** @fn int creat(const char *path, mode_t mode)
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* Creates a file.
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* @note Obsoleted by open()
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* @code
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* Same as doing open(path, O_CREAT | O_TRUNC | O_WRONLY, mode);
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* @endcode
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* @ref open()
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*/
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int creat (const char *, mode_t);
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/** @fn int fcntl(int fd, int cmd, ...)
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* Provides control over the properties of a descriptor that is
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* already open. The 3rd paramater is technically a void *, but may
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* be interpretted as an int by some commands or cast by others.
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* @ref FCNTL_Flags should be used as the cmd parameter
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*/
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int fcntl (int, int, ...);
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/** @fn int flock(int fd, int operation)
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* Applies or removes an advisory lock from descriptor fd.
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* @ref FCNTL_flock codes should be used as the operation parameter
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*/
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int flock (int, int);
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#endif
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/** @} */
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#endif /* !_SYS_FCNTL_H_ */
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