#
# Copyright (C) 2007 Karel Zak <kzak@redhat.com>
#
# This file is part of util-linux-ng.
#
# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This file 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.
#


function ts_abspath {
	cd $1
	pwd
}

function ts_skip_subtest {
	echo " IGNORE ($1)"
}

function ts_skip {
	ts_skip_subtest "$1"
	if [ -n "$2" -a -b "$2" ]; then
		ts_device_deinit "$2"
	fi
	exit 0
}

function ts_skip_nonroot {
	if [ $UID -ne 0 ]; then
		ts_skip "not root permissions"
	fi
}

function ts_failed_subtest {
	if [ x"$1" == x"" ]; then
		echo " FAILED ($TS_NS)"
	else
		echo " FAILED ($1)"
	fi
}

function ts_failed {
	ts_failed_subtest "$1"
	exit 1
}

function ts_ok_subtest {
	if [ x"$1" == x"" ]; then
		echo " OK"
	else
		echo " OK ($1)"
	fi
}

function ts_ok {
	ts_ok_subtest "$1"
	exit 0
}

function ts_log {
	echo "$1" >> $TS_OUTPUT
	[ "$TS_VERBOSE" == "yes" ] && echo "$1"
}

function ts_has_option {
	NAME="$1"
	ALL="$2"
	echo -n $ALL | sed 's/ //g' | awk 'BEGIN { FS="="; RS="--" } /('$NAME'$|'$NAME'=)/ { print "yes" }'
}

function ts_init_env {
	local mydir=$(ts_abspath $(dirname $0))

	export LANG="en_US.UTF-8"

	TS_TOPDIR=$(ts_abspath $mydir/../../)
	TS_SCRIPT="$mydir/$(basename $0)"
	TS_SUBDIR=$(dirname $TS_SCRIPT)
	TS_TESTNAME=$(basename $TS_SCRIPT)
	TS_COMPONENT=$(basename $TS_SUBDIR)

	TS_NSUBTESTS=0
	TS_NSUBFAILED=0

	TS_NS="$TS_COMPONENT/$TS_TESTNAME"
	TS_SELF="$TS_SUBDIR"

	TS_OUTDIR="$TS_TOPDIR/output/$TS_COMPONENT"
	TS_OUTPUT="$TS_OUTDIR/$TS_TESTNAME"
	TS_DIFFDIR="$TS_TOPDIR/diff/$TS_COMPONENT"
	TS_DIFF="$TS_DIFFDIR/$TS_TESTNAME"
	TS_EXPECTED="$TS_TOPDIR/expected/$TS_NS"
	TS_MOUNTPOINT="$TS_OUTDIR/${TS_TESTNAME}-mnt"

	TS_VERBOSE=$(ts_has_option "verbose" "$*")

	BLKID_FILE="$TS_OUTDIR/${TS_TESTNAME}.blkidtab"

	[ -d "$TS_OUTDIR" ]  || mkdir -p "$TS_OUTDIR"
	[ -d "$TS_DIFFDIR" ] || mkdir -p "$TS_DIFFDIR"

	declare -a TS_SUID_PROGS
	declare -a TS_SUID_USER
	declare -a TS_SUID_GROUP

	. $TS_TOPDIR/commands.sh

	export BLKID_FILE

	rm -f $TS_OUTPUT
	touch $TS_OUTPUT

	if [ "$TS_VERBOSE" == "yes" ]; then
		echo
		echo "     script: $TS_SCRIPT"
		echo "    sub dir: $TS_SUBDIR"
		echo "    top dir: $TS_TOPDIR"
		echo "       self: $TS_SELF"
		echo "  test name: $TS_TESTNAME"
		echo "  test desc: $TS_DESC"
		echo "  component: $TS_COMPONENT"
		echo "  namespace: $TS_NS"
		echo "    verbose: $TS_VERBOSE"
		echo "     output: $TS_OUTPUT"
		echo "   expected: $TS_EXPECTED"
		echo " mountpoint: $TS_MOUNTPOINT"
		echo
	fi
}

function ts_init_subtest {

	TS_SUBNAME="$1"

	TS_OUTPUT="$TS_OUTDIR/$TS_TESTNAME-$TS_SUBNAME"
	TS_DIFF="$TS_DIFFDIR/$TS_TESTNAME-$TS_SUBNAME"
	TS_EXPECTED="$TS_TOPDIR/expected/$TS_NS-$TS_SUBNAME"
	TS_MOUNTPOINT="$TS_OUTDIR/${TS_TESTNAME-$TS_SUBNAME}-mnt"

	[ $TS_NSUBTESTS -eq 0 ] && echo
	TS_NSUBTESTS=$(( $TS_NSUBTESTS + 1 ))

	printf "%16s: %-27s ..." "" "$TS_SUBNAME"
}

function ts_init {
	local is_fake=$( ts_has_option "fake" "$*")

	ts_init_env "$*"

	printf "%13s: %-30s ..." "$TS_COMPONENT" "$TS_DESC"

	[ "$is_fake" == "yes" ] && ts_skip "fake mode"
}

function ts_init_suid {
	PROG="$1"
	ct=${#TS_SUID_PROGS[*]}

	# Save info about original setting
	TS_SUID_PROGS[$ct]=$PROG
	TS_SUID_USER[$ct]=$(stat --printf="%U" $PROG)
	TS_SUID_GROUP[$ct]=$(stat --printf="%G" $PROG)

	chown root.root $PROG &> /dev/null
	chmod u+s $PROG &> /dev/null
}

function ts_gen_diff {
	local res=0

	if [ -s $TS_OUTPUT ]; then
		diff -u $TS_EXPECTED $TS_OUTPUT > $TS_DIFF
		[ -s $TS_DIFF ] && res=1
	else
		res=1
	fi
	return $res
}

function ts_finalize_subtest {
	local res=0

	if [ -s $TS_EXPECTED ]; then
		ts_gen_diff
		if [ $? -eq 1 ]; then
			ts_failed_subtest "$1"
			res=1
		else
			ts_ok_subtest "$1"
		fi
	else
		ts_skip_subtest "output undefined"
	fi

	[ $res -ne 0 ] && TS_NSUBFAILED=$(( $TS_NSUBFAILED + 1 ))
	return $res
}

function ts_finalize {
	for idx in $(seq 0 $((${#TS_SUID_PROGS[*]} - 1))); do
		PROG=${TS_SUID_PROGS[$idx]}
		chmod a-s $PROG &> /dev/null
		chown ${TS_SUID_USER[$idx]}.${TS_SUID_GROUP[$idx]} $PROG &> /dev/null
	done

	if [ $TS_NSUBTESTS -ne 0 ]; then
		printf "%11s..."
		if [ $TS_NSUBFAILED -ne 0 ]; then
			ts_failed "$TS_NSUBFAILED from $TS_NSUBTESTS sub-tests"
		else
			ts_ok "all $TS_NSUBTESTS sub-tests PASSED"
		fi
	fi

	if [ -s $TS_EXPECTED ]; then
		ts_gen_diff
		if [ $? -eq 1 ]; then
			ts_failed "$1"
		fi
		ts_ok "$1"
	fi

	ts_skip "output undefined"
}

function ts_die {
	ts_log "$1"
	if [ -n "$2" ] && [ -b "$2" ]; then
		ts_device_deinit "$2"
		ts_fstab_clean		# for sure... 
	fi
	ts_finalize
}

function ts_image_md5sum {
	local img=${1:-"$TS_OUTDIR/${TS_TESTNAME}.img"}
	echo $(md5sum "$img" | awk '{printf $1}') $(basename "$img")
}

function ts_image_init {
	local mib=${1:-"5"}	# size in MiBs
	local img=${2:-"$TS_OUTDIR/${TS_TESTNAME}.img"}
	
	dd if=/dev/zero of="$img" bs=1M count=$mib &> /dev/null
	echo "$img"
	return 0
}

function ts_device_init {
	local img=$(ts_image_init $1 $2)
	local dev=$($TS_CMD_LOSETUP -s -f "$img")

	if [ -z "$dev" ]; then
		ts_device_deinit $dev
		return 1		# error
	fi

	echo $dev
	return 0			# succes
}

function ts_device_deinit {
	local DEV="$1"

	if [ -b "$DEV" ]; then
		$TS_CMD_UMOUNT "$DEV" &> /dev/null
		$TS_CMD_LOSETUP -d "$DEV" &> /dev/null
	fi
}

function ts_uuid_by_devname {
	echo $($TS_CMD_BLKID -p -s UUID -o value $1)
}

function ts_label_by_devname {
	echo $($TS_CMD_BLKID -p -s LABEL -o value $1)
}

function ts_fstype_by_devname {
	echo $($TS_CMD_BLKID -p -s TYPE -o value $1)
}

function ts_device_has {
	local TAG="$1"
	local VAL="$2"
	local DEV="$3"
	local vl=""

	case $TAG in
		"TYPE") vl=$(ts_fstype_by_devname $DEV);;
		"LABEL") vl=$(ts_label_by_devname $DEV);;
		"UUID") vl=$(ts_uuid_by_devname $DEV);;
		*) return 1;;
	esac

	if [ "$vl" == "$VAL" ]; then
		return 0
	fi
	return 1
}

function ts_device_has_uuid {
	ts_uuid_by_devname "$1" | egrep -q '^[0-9a-z]{8}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{4}-[0-9a-z]{12}$'
	return $?
}

function ts_is_mounted {
	local DEV=$1

	grep -q $DEV /proc/mounts && return 0

	if [ "${DEV#/dev/loop/}" != "$DEV" ]; then
		return grep -q "/dev/loop${DEV#/dev/loop/}" /proc/mounts
	fi
	return 1
}

function ts_swapoff {
	local DEV="$1"

	# swapoff doesn't exist in build tree
	if [ ! -x "$TS_CMD_SWAPOFF" ]; then
		ln -sf $TS_CMD_SWAPON $TS_CMD_SWAPOFF
		REMSWAPOFF="true"
	fi
	LD_LIBRARY_PATH="$U_L_LIBRARY_PATH" \
			$TS_CMD_SWAPOFF $DEV 2>&1 >> $TS_OUTPUT
	if [ -n "$REMSWAPOFF" ]; then
		rm -f $TS_CMD_SWAPOFF
	fi
}

function ts_fstab_open {
	echo "# <!-- util-linux-ng test entry" >> /etc/fstab
}

function ts_fstab_close {
	echo "# -->" >> /etc/fstab
}

function ts_fstab_addline {
	local SPEC="$1"
	local MNT=${2:-"$TS_MOUNTPOINT"}
	local FS=${3:-"auto"}
	local OPT=${4:-"defaults"}

	echo "$SPEC   $MNT   $FS   $OPT   0   0" >> /etc/fstab
}

function ts_fstab_add {
	ts_fstab_open
	ts_fstab_addline $*
	ts_fstab_close
}

function ts_fstab_clean {
	sed --in-place "
/# <!-- util-linux-ng/!b
:a
/# -->/!{
  N
  ba
}
s/# <!-- util-linux-ng.*-->//;
/^$/d" /etc/fstab
}