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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-only
# Copyright (c) 2012 Wind River Systems, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details.
# example:
# cd build/tmp/work/routerstationpro-poky-linux/linux-yocto-3.0.32*/linux/meta/cfg/yocto/standard/routerstationpro
# kgit-config-cleaner -v --force --type all --audit-dir `pwd` \
# -i ../../../kernel-cache/bsp/routerstationpro/routerstationpro.cfg \
# -o cleaned_config
usage()
{
cat << EOF
kgit-config-cleaner [--force] [--dry-run] [--type <audit type list>]
--audit-dir <dir> [ -k <keep configs> ] \
-i <input config> -o <output config>
kgit-config-cleaner is run against an input file, and the results of an
initial kernel configuration that has produced a Kconfig option audit. It
produces a modified output file that can then be fed back into the process
to refine a kernel configuration.
type: comma separated list of audit types to process.
all: the default. process all audit files
errors: process fragment errors
invalid: process invalid options
mismatch: process mismatched options
redefined: process redefined options
non-hardare: process non-hardware options
input config: The input file to be cleaned. This is typically a defconfig.
output config: The filename of your choice. It is a copy of
input config, with offending lines removed.
keep config: An input config file with a list of configurations that should
be maintained regardless of other cleaning activities. These
are typically config options that should be declared as
'hardware' for the given board, and the keep entry would no
longer be necessary.
Note: This file is normally called 'hardware.cfg', so it can be
reused by the build process in future iterations.
audit dir: the directory that contains the output of a yocto kernel
configuration and audit. The input files in this directory are
automatically processed and used to produce the output
--force: force overwrite the output file
--dry-run: don't modify any files, but dump what would be done
--verbose: run with extra output
EOF
}
if [ -z "$1" ]; then
usage
exit
fi
while [ $# -gt 0 ]; do
case "$1" in
--i|-i) input=$2
shift
;;
--o|-o)
output=$2
shift
;;
--k|-k)
keep_config=$2
shift
;;
--audit-dir)
audit_dir=$2
shift
;;
--type)
audit_types=$2
shift
;;
--force|-f) force=t
;;
--dry-run) dry_run=t
;;
-v) verbose=t
;;
*) break
;;
esac
shift
done
if [ -z "$input" ]; then
usage
exit 1
fi
if [ -z "$output" ]; then
usage
exit 1
fi
if [ -z "$audit_dir" ]; then
usage
exit 1
fi
if [ -z "$audit_types" ] || [ "$audit_types" == "all" ]; then
fragment_errors_flag=t
invalid_cfg_flag=t
mismatch_flag=t
redefinition_flag=t
specified_non_hardware_flag=t
else
types=$(echo $audit_types | tr "," "\n")
for t in $types; do
case $t in
errors)
fragment_errors_flag=t
;;
invalid)
invalid_cfg_flag=t
;;
mismatch)
mismatch_flag=t
;;
redefined)
redefinition_flag=t
;;
non-hardware)
specified_non_hardware_flag=t
;;
*)
echo "Invalid audit type $t passed"
exit 1
;;
esac
done
fi
echo "INFO: running configuration cleaning on:"
echo "$input"
echo ""
fragment_errors_file="fragment_errors.txt"
invalid_cfg_file="invalid.cfg"
mismatch_file="mismatch.txt"
redefinition_file="redefinition.txt"
specified_non_hardware_file="specified_non_hdw.cfg"
specified_hardware_file="specified_hdw.cfg"
process_cfg_only_audit_file()
{
aud_file=$1
in_file=$2
out_file=$3
override_file=$4
count=0
echo ""
echo "INFO: processing `basename $aud_file`"
rm -f /tmp/removal.txt
# check every config specified in the intput file against the
# supplied audit file. If the audit says it was bad, then it should
# be removed. This is a brute force first step
cfg_list=`grep '^\(# \)\{0,1\}CONFIG_[a-zA-Z0-9_]*[=\( is not set\)]' \
$in_file | sed 's/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/'`
for o in $cfg_list; do
remove=
keep=
option_line=`grep "^\(# \)\{0,1\}$o[=\( is not set\)]" $in_file`
grep -q $o $aud_file
if [ $? -eq 0 ]; then
# check to see if the option is in the keep file
if [ -n "$keep_config" ] || [ -n "$override_file" ]; then
grep -q -w $o $keep_config $override_file
if [ $? -eq 0 ]; then
if [ -n "$verbose" ]; then
echo " INFO: option $o would have been removed, but it is"
echo " specified in the keep configuration list"
fi
keep=t
fi
fi
if [ -z "$keep" ]; then
count=`expr $count + 1`
if [ -n "$dry_run" ]; then
echo " [dry-run] option $o should be removed from the configuration"
else
remove=t
echo $option_line >> /tmp/removal.txt
fi
fi
fi
if [ -n "$remove" ]; then
if [ -n "$verbose" ]; then
echo " INFO: removing $option_line"
fi
option_line=`echo $option_line | sed 's%/%.%g'`
sed -i "/^$option_line/d" $out_file
if [ $? -ne 0 ]; then
echo " WARNING: could not remove $option_line"
fi
fi
done
if [ $count -eq 0 ]; then
echo " No `basename $aud_file` infractions are set by the input file"
fi
}
# The file is not only a bare listing of CONFIG_<blah> and
# hence requires special processing. This is a placeholder
# function
process_audit_file()
{
true
}
generate_option_list()
{
in_file=$1
out_file=$2
if [ -n "$verbose" ]; then
echo "INFO: generating option list from $in_file"
fi
cat $in_file | grep -o 'CONFIG_[a-zA-Z0-9_]*' | uniq >> $out_file
}
process_audit_directory()
{
if [ -n "$fragment_errors_flags" ] && [ -s "$audit_dir/$fragment_errors_file" ]; then
echo "INFO: processing $fragment_errors_file"
process_audit_file "$audit_dir/$fragment_errors_file" "$input" "$output"
fi
if [ -n "$invalid_cfg_flag" ] && [ -s "$audit_dir/$invalid_cfg_file" ]; then
echo "INFO: processing $invalid_cfg_file"
process_cfg_only_audit_file "$audit_dir/$invalid_cfg_file" "$input" "$output"
fi
if [ -n "$mismatch_flag" ] && [ -s "$audit_dir/$mismatch_file" ]; then
rm -f /tmp/mismatch.cfg
generate_option_list $audit_dir/$mismatch_file /tmp/mismatch.cfg
process_cfg_only_audit_file /tmp/mismatch.cfg "$input" "$output"
fi
if [ -n "$redefinition_flag" ] && [ -s "$audit_dir/$redefinition_file" ]; then
rm -f /tmp/redefinition.cfg
generate_option_list $audit_dir/$redefinition_file /tmp/redefinition.cfg
process_cfg_only_audit_file /tmp/redefinition.cfg "$input" "$output" "$specified_hardware_file"
fi
if [ -n "$specified_non_hardware_flag" ] && [ -s "$audit_dir/$specified_non_hardware_file" ]; then
process_cfg_only_audit_file "$audit_dir/$specified_non_hardware_file" "$input" "$output"
fi
}
if [ -s "$output" ] && [ -z "$force" ]; then
echo "output file $output exists, use -f to force output"
exit 1
fi
cp -f $input $output
process_audit_directory
echo "INFO: processing complete, output is saved in file: $output"
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