blob: 26b8f3d2a52e5a32a1b6cefba9320be39cc5eccf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
#!/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_check_test_command "$TS_CMD_MOUNTPOINT"
ts_skip_nonroot
ts_skip_docker
function mount_and_check {
# last arg must be an existing or to-be-mounted mountpoint
local mountpoint="${@: -1}"
$TS_CMD_MOUNT "$@" &> /dev/null \
|| ts_die "error: mount $*"
$TS_CMD_MOUNTPOINT -q "$mountpoint" \
|| ts_die "error: mountpoint $mountpoint"
}
DIR_PRIVATE="$TS_OUTDIR/mnt-move-private"
DIR_SRC="$DIR_PRIVATE/mnt-move-src"
DIR_A="$DIR_PRIVATE/mnt-move-A"
DIR_B="$DIR_PRIVATE/mnt-move-B"
# this may fail if there are mounted dirs left
rm -rf "$DIR_PRIVATE" || ts_die "cleanup failed, check manually!"
mkdir "$DIR_PRIVATE" || ts_die "error: mkdir DIR_PRIVATE"
# create bind mount and make it private to be sure
# (kernel cannot move mount with shared parent)
mount_and_check --bind $DIR_PRIVATE $DIR_PRIVATE
mount_and_check --make-rprivate $DIR_PRIVATE
# Is the bind mount still rw?
mkdir $DIR_SRC $DIR_A $DIR_B \
|| ts_die "error: mkdir on private bind mount"
# bind
mount_and_check --bind $DIR_SRC $DIR_A
# move
mount_and_check --move $DIR_A $DIR_B
# BTW a basic test for findmnt(8) and mountpoint(1)
for f in `find $DIR_PRIVATE2 $DIR_PRIVATE`; do
xo="$($TS_CMD_MOUNTPOINT -q "$f" 2>&1)"
x=$?
# mountpoint(1) returns 32 if mountpoint does not exist, map it to 1 to
# be compatible with findmnt(8)
if [ "$x" = "32" ]; then
x=1
fi
yo="$($TS_CMD_FINDMNT --kernel --mountpoint "$f" 2>&1)"
y=$?
[ "$x" = "$y" ] || ts_log "error: findmount vs. mountpoint: $x, $y, $f"
[ -z "$xo" ] || ts_log "error: mountpoint is not quiet: $x, $y, $f"
if [ "$y" = "0" -a "$yo" = "" ] || [ "$y" = "1" -a "$yo" != "" ]; then
ts_log "error, findmount return value vs. output: $x, $y, $f"
fi
done
# clean up
$TS_CMD_UMOUNT $DIR_B || ts_log "error: umount DIR_B"
rmdir $DIR_SRC $DIR_A $DIR_B || ts_log "error: rmdir DIR_B"
$TS_CMD_UMOUNT $DIR_PRIVATE || ts_log "error: umount DIR_PRIVATE"
rmdir $DIR_PRIVATE || ts_log "error: rmdir DIR_PRIVATE"
ts_log "Success"
ts_finalize
|
