tools/debugging/kernel-chktaint

Source file repositories/reference/linux-study-clean/tools/debugging/kernel-chktaint

File Facts

System
Linux kernel
Corpus path
tools/debugging/kernel-chktaint
Extension
[no extension]
Size
4346 bytes
Lines
236
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#! /bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Randy Dunlap <rdunlap@infradead.org>, 2018
# Thorsten Leemhuis <linux@leemhuis.info>, 2018

usage()
{
	cat <<EOF
usage: ${0##*/}
       ${0##*/} <int>

Call without parameters to decode /proc/sys/kernel/tainted.

Call with a positive integer as parameter to decode a value you
retrieved from /proc/sys/kernel/tainted on another system.

EOF
}

if [ "$1"x != "x" ]; then
	if  [ "$1"x == "--helpx" ] || [ "$1"x == "-hx" ] ; then
		usage
		exit 1
	elif  [ $1 -ge 0 ] 2>/dev/null ; then
		taint=$1
	else
		echo "Error: Parameter '$1' not a positive integer. Aborting." >&2
		exit 1
	fi
else
	TAINTFILE="/proc/sys/kernel/tainted"
	if [ ! -r $TAINTFILE ]; then
		echo "No file: $TAINTFILE"
		exit
	fi

	taint=`cat $TAINTFILE`
fi

if [ $taint -eq 0 ]; then
	echo "Kernel not Tainted"
	exit
else
	echo "Kernel is \"tainted\" for the following reasons:"
fi

T=$taint
out=

addout() {
	out=$out$1
}

if [ `expr $T % 2` -eq 0 ]; then
	addout "G"
else
	addout "P"
	echo " * proprietary module was loaded (#0)"
fi

T=`expr $T / 2`
if [ `expr $T % 2` -eq 0 ]; then
	addout " "
else
	addout "F"
	echo " * module was force loaded (#1)"
fi

T=`expr $T / 2`

Annotation

Implementation Notes