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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [sys/] [ioccom.h] - Blame information for rev 773

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/*-
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 * Copyright (c) 1982, 1986, 1990, 1993, 1994
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 *      The Regents of the University of California.  All rights reserved.
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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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 *      @(#)ioccom.h    8.2 (Berkeley) 3/28/94
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 * $Id: ioccom.h,v 1.2 2001-09-27 12:02:00 chris Exp $
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 */
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#ifndef _SYS_IOCCOM_H_
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#define _SYS_IOCCOM_H_
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/*
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 * Ioctl's have the command encoded in the lower word, and the size of
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 * any in or out parameters in the upper word.  The high 3 bits of the
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 * upper word are used to encode the in/out status of the parameter.
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 */
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#define IOCPARM_MASK    0x1fff          /* parameter length, at most 13 bits */
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#define IOCPARM_LEN(x)  (((x) >> 16) & IOCPARM_MASK)
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#define IOCBASECMD(x)   ((x) & ~(IOCPARM_MASK << 16))
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#define IOCGROUP(x)     (((x) >> 8) & 0xff)
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#define IOCPARM_MAX     PAGE_SIZE               /* max size of ioctl, mult. of PAGE_SIZE */
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#define IOC_VOID        0x20000000      /* no parameters */
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#define IOC_OUT         0x40000000      /* copy out parameters */
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#define IOC_IN          0x80000000      /* copy in parameters */
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#define IOC_INOUT       (IOC_IN|IOC_OUT)
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#define IOC_DIRMASK     0xe0000000      /* mask for IN/OUT/VOID */
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#define _IOC(inout,group,num,len) \
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        (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
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#define _IO(g,n)        _IOC(IOC_VOID,  (g), (n), 0)
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#define _IOR(g,n,t)     _IOC(IOC_OUT,   (g), (n), sizeof(t))
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#define _IOW(g,n,t)     _IOC(IOC_IN,    (g), (n), sizeof(t))
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/* this should be _IORW, but stdio got there first */
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#define _IOWR(g,n,t)    _IOC(IOC_INOUT, (g), (n), sizeof(t))
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#ifndef KERNEL
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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int     ioctl __P((int, int, ...));
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__END_DECLS
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#endif /* !KERNEL */
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#endif /* !_SYS_IOCCOM_H_ */

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