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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
23: /*-
24: * Copyright (c) 1982, 1986, 1990, 1993, 1994
25: * The Regents of the University of California. All rights reserved.
26: *
27: * Redistribution and use in source and binary forms, with or without
28: * modification, are permitted provided that the following conditions
29: * are met:
30: * 1. Redistributions of source code must retain the above copyright
31: * notice, this list of conditions and the following disclaimer.
32: * 2. Redistributions in binary form must reproduce the above copyright
33: * notice, this list of conditions and the following disclaimer in the
34: * documentation and/or other materials provided with the distribution.
35: * 3. All advertising materials mentioning features or use of this software
36: * must display the following acknowledgement:
37: * This product includes software developed by the University of
38: * California, Berkeley and its contributors.
39: * 4. Neither the name of the University nor the names of its contributors
40: * may be used to endorse or promote products derived from this software
41: * without specific prior written permission.
42: *
43: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
44: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
47: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53: * SUCH DAMAGE.
54: *
55: * @(#)ioccom.h 8.2 (Berkeley) 3/28/94
56: */
57:
58: #ifndef _SYS_IOCCOM_H_
59: #define _SYS_IOCCOM_H_
60:
61: /*
62: * Ioctl's have the command encoded in the lower word, and the size of
63: * any in or out parameters in the upper word. The high 3 bits of the
64: * upper word are used to encode the in/out status of the parameter.
65: */
66: #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */
67: #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
68: #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))
69: #define IOCGROUP(x) (((x) >> 8) & 0xff)
70:
71: #define IOCPARM_MAX (IOCPARM_MASK + 1) /* max size of ioctl args */
72: /* no parameters */
73: #define IOC_VOID (unsigned long)0x20000000
74: /* copy parameters out */
75: #define IOC_OUT (unsigned long)0x40000000
76: /* copy parameters in */
77: #define IOC_IN (unsigned long)0x80000000
78: /* copy paramters in and out */
79: #define IOC_INOUT (IOC_IN|IOC_OUT)
80: /* mask for IN/OUT/VOID */
81: #define IOC_DIRMASK (unsigned long)0xe0000000
82:
83: #define _IOC(inout,group,num,len) \
84: (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
85: #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
86: #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))
87: #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
88: /* this should be _IORW, but stdio got there first */
89: #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
90:
91: #endif /* !_SYS_IOCCOM_H_ */
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