Annotation of prex-old/include/sys/ioccom.h, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 1982, 1986, 1990, 1993, 1994
3: * The Regents of the University of California. All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the University nor the names of its contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: *
29: * @(#)ioccom.h 8.3 (Berkeley) 1/9/95
30: */
31:
32: #ifndef _SYS_IOCCOM_H_
33: #define _SYS_IOCCOM_H_
34:
35: /*
36: * Ioctl's have the command encoded in the lower word, and the size of
37: * any in or out parameters in the upper word. The high 3 bits of the
38: * upper word are used to encode the in/out status of the parameter.
39: */
40: #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */
41: #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
42: #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))
43: #define IOCGROUP(x) (((x) >> 8) & 0xff)
44:
45: #define IOCPARM_MAX 256
46:
47: #define IOC_VOID 0x20000000 /* no parameters */
48: #define IOC_OUT 0x40000000 /* copy out parameters */
49: #define IOC_IN 0x80000000U /* copy in parameters */
50: #define IOC_INOUT (IOC_IN|IOC_OUT)
51: #define IOC_DIRMASK 0xe0000000
52:
53: #define _IOC(inout,group,num,len) \
54: (int)(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
55: #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
56: #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))
57: #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
58: /* this should be _IORW, but stdio got there first */
59: #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
60:
61: #endif /* !_SYS_IOCCOM_H_ */
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