#
# Function library: provide common functions
#
# Copyright (C) 2008, Intel Corp.
#   Author: Huang Ying <ying.huang@intel.com>
#
# This file is released under the GPLv2.
#

setup_path()
{
	export PATH=$ROOT/bin:$PATH
}

script_dir()
{
	local rd=$(dirname "$0")
	(cd $rd; pwd)
}

relative_path()
{
	local len1=${#1}
	local len2=${#2}
	if [ $len1 -eq 0 -o $len1 -gt $len2 -o "${2:0:$len1}" != "$1" ]; then
		die "$2 is not the sub-path of $1!"
	fi
	len1=$((len1 + 1))
	echo "${2:$len1}"
}

die()
{
	echo "DIE: $@"
	echo "DIE: $@" 1>&2
	exit -1
}

driver_prepare()
{
	mkdir -p $WDIR/stamps
}

check_kern_warning_bug()
{
	local f="$1"
	[ -n "$f" ] || die "missing parameter for check_kern_warning"
	grep -e '----\[ cut here \]---' $f > /dev/null || \
	grep -e 'BUG:' $f > /dev/null
}

random_sleep()
{
	local s=$((RANDOM / 13107 + 5))
	sleep $s
}

start_background()
{
	if [ -n "$BACKGROUND" ]; then
		pid_background=$(bash -i -c "$BACKGROUND &>$WDIR/background_log & echo \$!")
		if ! ps -p $pid_background > /dev/null; then
			die "Failed to start background testing: $BACKGROUND"
		fi
	fi
}

stop_background()
{
	if [ -n "$pid_background" ]; then
		if ! kill -TERM -$pid_background &> /dev/null; then
			kill $pid_background || true
		fi
	fi
}

filter_fake_panic()
{
	local orig_klog=$1
	local new_klog=$2
	[ $# -eq 2 ] || die "missing parameter for filter_fake_panic"

	local pn
	pn=$(grep -n "Fake kernel panic" $orig_klog | cut -d ':' -f 1 | head -1)
	if [ -z "$pn" ]; then
		cp $orig_klog $new_klog
	else
		sed -n "1,${pn}p" < $orig_klog > $new_klog
	fi
}