00001 /*- 00002 * Copyright (c) 1982, 1986, 1990, 1993, 1994 00003 * The Regents of the University of California. All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 4. Neither the name of the University nor the names of its contributors 00014 * may be used to endorse or promote products derived from this software 00015 * without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * @(#)ioccom.h 8.2 (Berkeley) 3/28/94 00030 * $FreeBSD: src/sys/sys/ioccom.h,v 1.15 2004/04/07 04:19:49 imp Exp $ 00031 */ 00032 00033 #ifndef _SYS_IOCCOM_H_ 00034 #define _SYS_IOCCOM_H_ 00035 00036 /* 00037 * Ioctl's have the command encoded in the lower word, and the size of 00038 * any in or out parameters in the upper word. The high 3 bits of the 00039 * upper word are used to encode the in/out status of the parameter. 00040 */ 00041 #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */ 00042 #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK) 00043 #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16)) 00044 #define IOCGROUP(x) (((x) >> 8) & 0xff) 00045 00046 #define IOCPARM_MAX PAGE_SIZE /* max size of ioctl, mult. of PAGE_SIZE */ 00047 #define IOC_VOID 0x20000000 /* no parameters */ 00048 #define IOC_OUT 0x40000000 /* copy out parameters */ 00049 #define IOC_IN 0x80000000 /* copy in parameters */ 00050 #define IOC_INOUT (IOC_IN|IOC_OUT) 00051 #define IOC_DIRMASK 0xe0000000 /* mask for IN/OUT/VOID */ 00052 00053 #define _IOC(inout,group,num,len) \ 00054 ((unsigned long)(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))) 00055 #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0) 00056 #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t)) 00057 #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t)) 00058 /* this should be _IORW, but stdio got there first */ 00059 #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t)) 00060 00061 #ifndef _KERNEL 00062 00063 #include <sys/cdefs.h> 00064 00065 __BEGIN_DECLS 00066 IMPORT_C int ioctl(int, unsigned long, ...); 00067 __END_DECLS 00068 00069 #endif 00070 00071 #endif /* !_SYS_IOCCOM_H_ */