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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
26: /*-
27: * Copyright (c) 1982, 1986, 1990, 1993, 1994
28: * The Regents of the University of California. All rights reserved.
29: *
30: * Redistribution and use in source and binary forms, with or without
31: * modification, are permitted provided that the following conditions
32: * are met:
33: * 1. Redistributions of source code must retain the above copyright
34: * notice, this list of conditions and the following disclaimer.
35: * 2. Redistributions in binary form must reproduce the above copyright
36: * notice, this list of conditions and the following disclaimer in the
37: * documentation and/or other materials provided with the distribution.
38: * 3. All advertising materials mentioning features or use of this software
39: * must display the following acknowledgement:
40: * This product includes software developed by the University of
41: * California, Berkeley and its contributors.
42: * 4. Neither the name of the University nor the names of its contributors
43: * may be used to endorse or promote products derived from this software
44: * without specific prior written permission.
45: *
46: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56: * SUCH DAMAGE.
57: *
58: * @(#)ioccom.h 8.3 (Berkeley) 1/9/95
59: */
60:
61: #ifndef _SYS_IOCCOM_H_
62: #define _SYS_IOCCOM_H_
63:
64: /*
65: * Ioctl's have the command encoded in the lower word, and the size of
66: * any in or out parameters in the upper word. The high 3 bits of the
67: * upper word are used to encode the in/out status of the parameter.
68: */
69: #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */
70: #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
71: #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))
72: #define IOCGROUP(x) (((x) >> 8) & 0xff)
73:
74: #define IOCPARM_MAX (IOCPARM_MASK + 1) /* max size of ioctl args */
75: /* no parameters */
76: #define IOC_VOID (unsigned long)0x20000000
77: /* copy parameters out */
78: #define IOC_OUT (unsigned long)0x40000000
79: /* copy parameters in */
80: #define IOC_IN (unsigned long)0x80000000
81: /* copy paramters in and out */
82: #define IOC_INOUT (IOC_IN|IOC_OUT)
83: /* mask for IN/OUT/VOID */
84: #define IOC_DIRMASK (unsigned long)0xe0000000
85:
86: #define _IOC(inout,group,num,len) \
87: (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
88: #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
89: #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))
90: #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
91: /* this should be _IORW, but stdio got there first */
92: #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
93:
94: #endif /* !_SYS_IOCCOM_H_ */
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