#!/bin/bash

# This file is part of util-linux.
#
# 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.

TS_TOPDIR="${0%/*}/../.."
TS_DESC="swaplabel"

. "$TS_TOPDIR"/functions.sh
ts_init "$*"

ts_check_test_command "$TS_CMD_MKSWAP"
ts_check_test_command "$TS_CMD_SWAPLABEL"
ts_check_test_command "$TS_HELPER_SYSINFO"

# fallocate does not work on most file systems
function fallocate_or_skip()
{
	$TS_CMD_FALLOCATE -x -l $1 $2 2>/dev/null || \
	truncate -s $1 $2 || \
	ts_skip "no way to create test image"
}

IMAGE=${TS_OUTDIR}/${TS_TESTNAME}.file

PAGE_SIZE=$($TS_HELPER_SYSINFO pagesize)
PAGE_SIZE_KB=$(( $PAGE_SIZE / 1024 ))
MIN_SWAP_SIZE=$(( 10 * $PAGE_SIZE ))
MIN_SWAP_SIZE_KB=$(( MIN_SWAP_SIZE / 1024 ))

rm -f $IMAGE
fallocate_or_skip $(( $MIN_SWAP_SIZE - 1 )) $IMAGE
$TS_CMD_MKSWAP \
	--label 1234567890abcdef \
	--uuid 12345678-abcd-abcd-abcd-1234567890ab \
	$IMAGE >> $TS_OUTPUT 2>> $TS_ERRLOG

sed -i -e "s/ $MIN_SWAP_SIZE_KB KiB/ 10 pages/" \
    -e "s:$IMAGE:<swapfile>:g" \
    -e "s/insecure permissions [0-9]*/insecure permissions <perm>/g" \
   $TS_OUTPUT $TS_ERRLOG

rm -f $IMAGE
fallocate_or_skip $MIN_SWAP_SIZE $IMAGE
$TS_CMD_MKSWAP \
	--label 1234567890abcdef \
	--uuid 12345678-abcd-abcd-abcd-1234567890ab \
	$IMAGE >> $TS_OUTPUT 2>> $TS_ERRLOG

sed -i -e "s/ $(( $MIN_SWAP_SIZE_KB - $PAGE_SIZE_KB )) KiB/ 9 pages/" \
    -e "s/($(( $MIN_SWAP_SIZE - $PAGE_SIZE )) bytes)/(9xPGSZ bytes)/" \
    -e "s:$IMAGE:<swapfile>:g" \
    -e "s/insecure permissions [0-9]*/insecure permissions <perm>/g" \
    $TS_OUTPUT $TS_ERRLOG

$TS_CMD_SWAPLABEL $IMAGE >> $TS_OUTPUT 2>> $TS_ERRLOG

#rm -f $IMAGE

ts_finalize