FreeBSD/Linux Kernel Cross Reference
sys/sys/ioccom.h
1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1982, 1986, 1990, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)ioccom.h 8.2 (Berkeley) 3/28/94
32 * $FreeBSD$
33 */
34
35 #ifndef _SYS_IOCCOM_H_
36 #define _SYS_IOCCOM_H_
37
38 /*
39 * Ioctl's have the command encoded in the lower word, and the size of
40 * any in or out parameters in the upper word. The high 3 bits of the
41 * upper word are used to encode the in/out status of the parameter.
42 */
43 #define IOCPARM_SHIFT 13 /* number of bits for ioctl size */
44 #define IOCPARM_MASK ((1 << IOCPARM_SHIFT) - 1) /* parameter length mask */
45 #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
46 #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))
47 #define IOCGROUP(x) (((x) >> 8) & 0xff)
48
49 #define IOCPARM_MAX (1 << IOCPARM_SHIFT) /* max size of ioctl */
50 #define IOC_VOID 0x20000000 /* no parameters */
51 #define IOC_OUT 0x40000000 /* copy out parameters */
52 #define IOC_IN 0x80000000 /* copy in parameters */
53 #define IOC_INOUT (IOC_IN|IOC_OUT)
54 #define IOC_DIRMASK (IOC_VOID|IOC_OUT|IOC_IN)
55
56 #define _IOC(inout,group,num,len) ((unsigned long) \
57 ((inout) | (((len) & IOCPARM_MASK) << 16) | ((group) << 8) | (num)))
58 #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
59 #define _IOWINT(g,n) _IOC(IOC_VOID, (g), (n), sizeof(int))
60 #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))
61 #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
62 /* this should be _IORW, but stdio got there first */
63 #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
64 /* Replace length/type in an ioctl command. */
65 #define _IOC_NEWLEN(ioc, len) \
66 (((~(IOCPARM_MASK << 16)) & (ioc)) | (((len) & IOCPARM_MASK) << 16))
67 #define _IOC_NEWTYPE(ioc, type) _IOC_NEWLEN((ioc), sizeof(type))
68
69 #ifdef _KERNEL
70
71 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
72 defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
73 #define IOCPARM_IVAL(x) ((int)(intptr_t)(void *)*(caddr_t *)(void *)(x))
74 #endif
75
76 #define _IOC_INVALID (_IOC_VOID|_IOC_INOUT) /* Never valid cmd value,
77 use as filler */
78
79 #else
80
81 #include <sys/cdefs.h>
82
83 __BEGIN_DECLS
84 int ioctl(int, unsigned long, ...);
85 __END_DECLS
86
87 #endif
88
89 #endif /* !_SYS_IOCCOM_H_ */
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