1/*
2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 * 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. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <stdio.h>
29#include <asm/ioctl.h>
30
31typedef unsigned short u16;
32
33static const char *
34dir2str(const char *name, u16 dir)
35{
36	switch (dir) {
37#define CASE(x) case x: return #x
38		CASE(_IOC_NONE);
39		CASE(_IOC_READ);
40		CASE(_IOC_WRITE);
41		CASE(_IOC_READ|_IOC_WRITE);
42	}
43
44	static char buf[3 + sizeof(dir) * 2];
45	fprintf(stderr,
46		"print_ioctlents: WARNING: invalid dir 0x%02x in %s\n",
47		dir, name);
48	snprintf(buf, sizeof(buf), "0x%02x", dir);
49	return buf;
50}
51
52void
53print_ioctlent(const char *info, const char *name,
54	       u16 dir, u16 type, u16 nr, u16 size)
55{
56	unsigned int type_nr =
57		((unsigned) type << _IOC_TYPESHIFT) |
58		((unsigned) nr << _IOC_NRSHIFT);
59
60	if (dir & ~_IOC_DIRMASK)
61		fprintf(stderr,
62			"print_ioctlents: WARNING: dir 0x%02x is out of mask 0x%02x in %s\n",
63			dir, _IOC_DIRMASK, name);
64	if (type & ~_IOC_TYPEMASK)
65		fprintf(stderr,
66			"print_ioctlents: WARNING: type 0x%02x is out of mask 0x%02x in %s\n",
67			type, _IOC_TYPEMASK, name);
68	if (nr & ~_IOC_NRMASK)
69		fprintf(stderr,
70			"print_ioctlents: WARNING: nr 0x%02x is out of mask 0x%02x in %s\n",
71			nr, _IOC_NRMASK, name);
72	if (size & ~_IOC_SIZEMASK)
73		fprintf(stderr,
74			"print_ioctlents: WARNING: size 0x%02x is out of mask 0x%02x in %s\n",
75			size, _IOC_SIZEMASK, name);
76
77	printf("{ \"%s\", \"%s\", %s, 0x%04x, 0x%02x },\n",
78		info, name, dir2str(name, dir), type_nr, size);
79}
80