95 lines
2.7 KiB
Bash
Executable file
95 lines
2.7 KiB
Bash
Executable file
#!/bin/bash
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#
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# Copyright (C) 2007 Karel Zak <kzak@redhat.com>
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#
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# This file is part of util-linux.
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#
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# This file is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This file is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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TS_TOPDIR="${0%/*}/../.."
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TS_DESC="move"
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. "$TS_TOPDIR"/functions.sh
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ts_init "$*"
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ts_check_test_command "$TS_CMD_MOUNT"
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ts_check_test_command "$TS_CMD_UMOUNT"
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ts_check_test_command "$TS_CMD_FINDMNT"
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ts_check_test_command "$TS_CMD_MOUNTPOINT"
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ts_skip_nonroot
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ts_skip_docker
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function mount_and_check {
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# last arg must be an existing or to-be-mounted mountpoint
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local mountpoint="${@: -1}"
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$TS_CMD_MOUNT "$@" &> /dev/null \
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|| ts_die "error: mount $*"
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$TS_CMD_MOUNTPOINT -q "$mountpoint" \
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|| ts_die "error: mountpoint $mountpoint"
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}
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DIR_PRIVATE="$TS_OUTDIR/mnt-move-private"
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DIR_SRC="$DIR_PRIVATE/mnt-move-src"
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DIR_A="$DIR_PRIVATE/mnt-move-A"
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DIR_B="$DIR_PRIVATE/mnt-move-B"
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# this may fail if there are mounted dirs left
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rm -rf "$DIR_PRIVATE" || ts_die "cleanup failed, check manually!"
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mkdir "$DIR_PRIVATE" || ts_die "error: mkdir DIR_PRIVATE"
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# create bind mount and make it private to be sure
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# (kernel cannot move mount with shared parent)
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mount_and_check --bind $DIR_PRIVATE $DIR_PRIVATE
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mount_and_check --make-rprivate $DIR_PRIVATE
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# Is the bind mount still rw?
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mkdir $DIR_SRC $DIR_A $DIR_B \
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|| ts_die "error: mkdir on private bind mount"
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# bind
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mount_and_check --bind $DIR_SRC $DIR_A
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# move
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mount_and_check --move $DIR_A $DIR_B
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# BTW a basic test for findmnt(8) and mountpoint(1)
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for f in `find $DIR_PRIVATE2 $DIR_PRIVATE`; do
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xo="$($TS_CMD_MOUNTPOINT -q "$f" 2>&1)"
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x=$?
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# mountpoint(1) returns 32 if mountpoint does not exist, map it to 1 to
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# be compatible with findmnt(8)
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if [ "$x" = "32" ]; then
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x=1
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fi
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yo="$($TS_CMD_FINDMNT --kernel --mountpoint "$f" 2>&1)"
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y=$?
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[ "$x" = "$y" ] || ts_log "error: findmount vs. mountpoint: $x, $y, $f"
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[ -z "$xo" ] || ts_log "error: mountpoint is not quiet: $x, $y, $f"
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if [ "$y" = "0" -a "$yo" = "" ] || [ "$y" = "1" -a "$yo" != "" ]; then
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ts_log "error, findmount return value vs. output: $x, $y, $f"
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fi
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done
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# clean up
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$TS_CMD_UMOUNT $DIR_B || ts_log "error: umount DIR_B"
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rmdir $DIR_SRC $DIR_A $DIR_B || ts_log "error: rmdir DIR_B"
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$TS_CMD_UMOUNT $DIR_PRIVATE || ts_log "error: umount DIR_PRIVATE"
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rmdir $DIR_PRIVATE || ts_log "error: rmdir DIR_PRIVATE"
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ts_log "Success"
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ts_finalize
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