home *** CD-ROM | disk | FTP | other *** search
- /* $NetBSD: ioccom.h,v 1.4 1994/10/30 21:49:56 cgd Exp $ */
-
- /*-
- * Copyright (c) 1982, 1986, 1990, 1993, 1994
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)ioccom.h 8.2 (Berkeley) 3/28/94
- */
-
- #ifndef _SYS_IOCCOM_H_
- #define _SYS_IOCCOM_H_
-
- /*
- * Ioctl's have the command encoded in the lower word, and the size of
- * any in or out parameters in the upper word. The high 3 bits of the
- * upper word are used to encode the in/out status of the parameter.
- */
- #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */
- #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
- #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))
- #define IOCGROUP(x) (((x) >> 8) & 0xff)
-
- #define IOCPARM_MAX NBPG /* max size of ioctl args, mult. of NBPG */
- /* no parameters */
- #define IOC_VOID (unsigned long)0x20000000
- /* copy parameters out */
- #define IOC_OUT (unsigned long)0x40000000
- /* copy parameters in */
- #define IOC_IN (unsigned long)0x80000000
- /* copy paramters in and out */
- #define IOC_INOUT (IOC_IN|IOC_OUT)
- /* mask for IN/OUT/VOID */
- #define IOC_DIRMASK (unsigned long)0xe0000000
-
- #define _IOC(inout,group,num,len) \
- (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
- #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
- #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))
- #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
- /* this should be _IORW, but stdio got there first */
- #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
-
- #endif /* !_SYS_IOCCOM_H_ */
-