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Add a tool to decode ioctl commands.

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One or more ioctl command values can be passed as arguments on the command
line.  For each value, the command is broken down into it's components
(direction, group, number, and length).  In addition, if a command has a
known name it is output via sysdecode_ioctlname().

Reviewed by:	kib, emaste, avg
Approved by:	re (gjb)
Differential Revision:	https://reviews.freebsd.org/D6851
This commit is contained in:
John Baldwin 2016-06-15 21:01:53 +00:00
parent fe0bdd1d2c
commit 49b39ebf49
2 changed files with 104 additions and 0 deletions
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10
tools/tools/decioctl/Makefile Normal file
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# $FreeBSD$
PROG= decioctl
SRCS= decioctl.c
MAN=
BINDIR?= /usr/bin
LIBADD= sysdecode
.include <bsd.prog.mk>

94
tools/tools/decioctl/decioctl.c Normal file
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/*-
* Copyright (c) 2005-2006,2016 John H. Baldwin <jhb@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/ioccom.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysdecode.h>
static void
usage(char **av)
{
fprintf(stderr, "%s: <ioctl> [ ... ]\n", av[0]);
exit(1);
}
int
main(int ac, char **av)
{
unsigned long cmd;
const char *name;
char *cp;
int group, i;
if (ac < 2)
usage(av);
printf(" command : dir group num len name\n");
for (i = 1; i < ac; i++) {
errno = 0;
cmd = strtoul(av[i], &cp, 0);
if (*cp != '\0' || errno != 0) {
fprintf(stderr, "Invalid integer: %s\n", av[i]);
usage(av);
}
printf("0x%08lx: ", cmd);
switch (cmd & IOC_DIRMASK) {
case IOC_VOID:
printf("VOID ");
break;
case IOC_OUT:
printf("OUT ");
break;
case IOC_IN:
printf("IN ");
break;
case IOC_INOUT:
printf("INOUT");
break;
default:
printf("%01lx ???", (cmd & IOC_DIRMASK) >> 29);
break;
}
printf(" ");
group = IOCGROUP(cmd);
if (isprint(group))
printf(" '%c' ", group);
else
printf(" 0x%02x", group);
printf(" %3lu %4lu", cmd & 0xff, IOCPARM_LEN(cmd));
name = sysdecode_ioctlname(cmd);
if (name != NULL)
printf(" %s", name);
printf("\n");
}
return (0);
}