#!/bin/bash

#
# Copyright (C) 2007 Karel Zak <kzak@redhat.com>
#
# 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="move"

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

ts_check_test_command "$TS_CMD_MOUNT"
ts_check_test_command "$TS_CMD_UMOUNT"
ts_check_test_command "$TS_CMD_FINDMNT"

ts_skip_nonroot

DIR_PRIVATE2="$TS_OUTDIR/mnt-move-private2"
DIR_PRIVATE="$TS_OUTDIR/mnt-move-private"

DIR_SRC="$DIR_PRIVATE/mnt-move-src"
DIR_A="$DIR_PRIVATE/mnt-move-A"
DIR_B="$DIR_PRIVATE/mnt-move-B"

# create bind mount and make it private to be sure
# (kernel cannot move mount with shared parent)
[ -d $DIR_PRIVATE2 ] || mkdir $DIR_PRIVATE2
[ -d $DIR_PRIVATE ] || mkdir $DIR_PRIVATE
$TS_CMD_MOUNT --bind $DIR_PRIVATE2 $DIR_PRIVATE
$TS_CMD_MOUNT --make-private $DIR_PRIVATE

[ -d $DIR_SRC ] || mkdir $DIR_SRC
[ -d $DIR_A ] || mkdir $DIR_A
[ -d $DIR_B ] || mkdir $DIR_B

# bind
$TS_CMD_MOUNT --bind $DIR_SRC $DIR_A

# check the bind
$TS_CMD_FINDMNT --kernel --target "$DIR_A" &> /dev/null
[ "$?" == "0" ] || ts_die "Cannot find binded $DIR_A in /proc/self/mountinfo"

# move
$TS_CMD_MOUNT --move $DIR_A $DIR_B

# check the move
$TS_CMD_FINDMNT --kernel --target "$DIR_B" &> /dev/null
[ "$?" == "0" ] || ts_die "Cannot find binded $DIR_B in /proc/self/mountinfo"

# clean up
$TS_CMD_UMOUNT $DIR_B
rmdir $DIR_SRC $DIR_A $DIR_B

$TS_CMD_UMOUNT $DIR_PRIVATE
rmdir $DIR_PRIVATE $DIR_PRIVATE2

ts_log "Success"
ts_finalize