ioccom.h (4673B) - Raw
1 /* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ 29 /*- 30 * Copyright (c) 1982, 1986, 1990, 1993, 1994 31 * The Regents of the University of California. All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. All advertising materials mentioning features or use of this software 42 * must display the following acknowledgement: 43 * This product includes software developed by the University of 44 * California, Berkeley and its contributors. 45 * 4. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)ioccom.h 8.2 (Berkeley) 3/28/94 62 */ 63 64 #ifndef _SYS_IOCCOM_H_ 65 #define _SYS_IOCCOM_H_ 66 67 #include <sys/_types.h> 68 69 /* 70 * Ioctl's have the command encoded in the lower word, and the size of 71 * any in or out parameters in the upper word. The high 3 bits of the 72 * upper word are used to encode the in/out status of the parameter. 73 */ 74 #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */ 75 #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK) 76 #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16)) 77 #define IOCGROUP(x) (((x) >> 8) & 0xff) 78 79 #define IOCPARM_MAX (IOCPARM_MASK + 1) /* max size of ioctl args */ 80 /* no parameters */ 81 #define IOC_VOID (__uint32_t)0x20000000 82 /* copy parameters out */ 83 #define IOC_OUT (__uint32_t)0x40000000 84 /* copy parameters in */ 85 #define IOC_IN (__uint32_t)0x80000000 86 /* copy parameters in and out */ 87 #define IOC_INOUT (IOC_IN|IOC_OUT) 88 /* mask for IN/OUT/VOID */ 89 #define IOC_DIRMASK (__uint32_t)0xe0000000 90 91 #define _IOC(inout, group, num, len) \ 92 (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num)) 93 #define _IO(g, n) _IOC(IOC_VOID, (g), (n), 0) 94 #define _IOR(g, n, t) _IOC(IOC_OUT, (g), (n), sizeof(t)) 95 #define _IOW(g, n, t) _IOC(IOC_IN, (g), (n), sizeof(t)) 96 /* this should be _IORW, but stdio got there first */ 97 #define _IOWR(g, n, t) _IOC(IOC_INOUT, (g), (n), sizeof(t)) 98 99 #endif /* !_SYS_IOCCOM_H_ */