| /* $NetBSD: ioccom.h,v 1.8 2005/12/11 12:25:20 christos 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. 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 8.3 (Berkeley) 1/9/95 | |
| */ | |
| #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 parameters 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_ */ |