update-kernel-config

#!/bin/bash

function check_program {
    prog=$1

    if ! type $prog >& /dev/null ; then
	echo "Can't find the $prog script in the search path."
	echo "Please copy it from the xfstests-bld directory"
	echo "to a local bin directory."
	exit 1
    fi
}

check_program kbuild
check_program install-kconfig

function add_config() {
    set -vx
    BLD_DIR=$($KBUILD --get-build-dir)
    if test -z "$BLD_DIR" ; then
	echo "Can't find kernel build directory"
	exit 1
    fi
    if ! test -d "$BLD_DIR" ; then
	echo "Build directory $BLD_DIR does not exist"
	exit 1
    fi

    if test -f "$BLD_DIR/.config" ; then
	cp "$BLD_DIR/.config" /tmp/config-save.$$
    fi

    DEFCONFIG=$(install-kconfig $INSTALL_KCONFIG_OPTS $INSTALL_KCONFIG_OPTS \
				--get-config-fn)
    if test -z "$DEFCONFIG" ; then
	echo "Can't find defconfig file"
	exit 1
    fi
    if ! test -f "$DEFCONFIG" ; then
	echo "Defocnfig file $DEFCONFIG does not exist"
	exit 1
    fi

    cp "$DEFCONFIG" "$BLD_DIR/.config"
    cat "$ADD_FILE" >> "$BLD_DIR/.config"
    $KBUILD olddefconfig >& /dev/null
    $KBUILD savedefconfig >& /dev/null
    cp "$BLD_DIR/defconfig" "$DEFCONFIG"
}

KBUILD=kbuild
INSTALL_KCONFIG_OPTS=

while [ "$1" != "" ];
do
    case "$1" in
	--use-generic)
	    INSTALL_KCONFIG_OPTS=--generic
	    ;;
	--perf)
	    INSTALL_KCONFIG_OPTS=--perf
	    ;;
	-*)
	    echo "unknown option: $1"
	    exit 1
	    ;;
	*)
	    break
	    ;;
    esac
    shift
done

ADD_FILE=$1

if test -z "$ADD_FILE" ; then
    echo "Usage: $0 <add-file>"
    exit 1
fi

add_config

exit 0