1 /*- 2 * Copyright (c) 1982, 1986, 1990, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)ioccom.h 8.2 (Berkeley) 3/28/94 30 * $FreeBSD: src/sys/sys/ioccom.h,v 1.9 1999/12/29 04:24:42 peter Exp $ 31 */ 32 33 #ifndef _SYS_IOCCOM_H_ 34 #define _SYS_IOCCOM_H_ 35 36 /* 37 * Ioctl's have the command encoded in the lower word, and the size of 38 * any in or out parameters in the upper word. The high 3 bits of the 39 * upper word are used to encode the in/out status of the parameter. 40 */ 41 #define IOCPARM_SHIFT 13 /* number of bits for ioctl size */ 42 #define IOCPARM_MASK ((1 << IOCPARM_SHIFT) - 1) /* parameter length mask */ 43 #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK) 44 #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16)) 45 #define IOCGROUP(x) (((x) >> 8) & 0xff) 46 47 #define IOCPARM_MAX ((1 << IOCPARM_SHIFT) - 1) /* max size of ioctl */ 48 #define IOC_VOID 0x20000000 /* no parameters */ 49 #define IOC_OUT 0x40000000 /* copy out parameters */ 50 #define IOC_IN 0x80000000 /* copy in parameters */ 51 #define IOC_INOUT (IOC_IN|IOC_OUT) 52 #define IOC_DIRMASK (IOC_VOID|IOC_OUT|IOC_IN) 53 54 #define _IOC(inout,group,num,len) ((unsigned long) \ 55 ((inout) | (((len) & IOCPARM_MASK) << 16) | ((group) << 8) | (num))) 56 #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0) 57 #define _IOWINT(g,n) _IOC(IOC_VOID, (g), (n), sizeof(int)) 58 #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t)) 59 #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t)) 60 /* this should be _IORW, but stdio got there first */ 61 #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t)) 62 63 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL) 64 65 #include <sys/cdefs.h> 66 67 __BEGIN_DECLS 68 int ioctl(int, unsigned long, ...); 69 __END_DECLS 70 71 #endif 72 73 #endif /* !_SYS_IOCCOM_H_ */ 74