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2aa62f2b | 1 | /* $NetBSD: ioccom.h,v 1.8 2005/12/11 12:25:20 christos Exp $ */\r |
2 | \r | |
3 | /*-\r | |
4 | * Copyright (c) 1982, 1986, 1990, 1993, 1994\r | |
5 | * The Regents of the University of California. All rights reserved.\r | |
6 | *\r | |
7 | * Redistribution and use in source and binary forms, with or without\r | |
8 | * modification, are permitted provided that the following conditions\r | |
9 | * are met:\r | |
10 | * 1. Redistributions of source code must retain the above copyright\r | |
11 | * notice, this list of conditions and the following disclaimer.\r | |
12 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
13 | * notice, this list of conditions and the following disclaimer in the\r | |
14 | * documentation and/or other materials provided with the distribution.\r | |
15 | * 3. Neither the name of the University nor the names of its contributors\r | |
16 | * may be used to endorse or promote products derived from this software\r | |
17 | * without specific prior written permission.\r | |
18 | *\r | |
19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r | |
20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r | |
23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r | |
24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r | |
25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r | |
27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r | |
28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r | |
29 | * SUCH DAMAGE.\r | |
30 | *\r | |
31 | * @(#)ioccom.h 8.3 (Berkeley) 1/9/95\r | |
32 | */\r | |
2aa62f2b | 33 | #ifndef _SYS_IOCCOM_H_\r |
34 | #define _SYS_IOCCOM_H_\r | |
35 | \r | |
36 | /*\r | |
37 | * Ioctl's have the command encoded in the lower word, and the size of\r | |
38 | * any in or out parameters in the upper word. The high 3 bits of the\r | |
39 | * upper word are used to encode the in/out status of the parameter.\r | |
40 | */\r | |
41 | #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */\r | |
d09ed37f | 42 | \r |
2aa62f2b | 43 | #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)\r |
44 | #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))\r | |
45 | #define IOCGROUP(x) (((x) >> 8) & 0xff)\r | |
46 | \r | |
47 | #define IOCPARM_MAX NBPG /* max size of ioctl args, mult. of NBPG */\r | |
48 | /* no parameters */\r | |
49 | #define IOC_VOID (unsigned long)0x20000000\r | |
50 | /* copy parameters out */\r | |
51 | #define IOC_OUT (unsigned long)0x40000000\r | |
52 | /* copy parameters in */\r | |
53 | #define IOC_IN (unsigned long)0x80000000\r | |
54 | /* copy parameters in and out */\r | |
55 | #define IOC_INOUT (IOC_IN|IOC_OUT)\r | |
56 | /* mask for IN/OUT/VOID */\r | |
57 | #define IOC_DIRMASK (unsigned long)0xe0000000\r | |
58 | \r | |
d09ed37f | 59 | #define _IOC(inout,group,num,len) (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))\r |
60 | \r | |
2aa62f2b | 61 | #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)\r |
62 | #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))\r | |
63 | #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))\r | |
d09ed37f | 64 | \r |
2aa62f2b | 65 | /* this should be _IORW, but stdio got there first */\r |
66 | #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))\r | |
67 | \r | |
68 | #endif /* !_SYS_IOCCOM_H_ */\r |