[rsync-backup] / mount-backup-volume

#! /bin/sh -ex

: ${vgtag=@backup} ${vgprefix=vg-backup-}
: ${mntbkpdir=/mnt/bkp}
: ${STOREDIR=$mntbkpdir/store} ${METADIR=$mntbkpdir/meta}

vgs=$(vgs --noheadings -oname)
found=nil
for vg in $vgs; do
  case "$found,$vg" in
    nil,$vgprefix*)
      found=t
      tag=${vg#$vgprefix}
      ;;
    t,$vgprefix*)
      echo >&2 "$0: multiple backup volumes attached"
      exit 1
      ;;
  esac
done
case $found in
  nil) echo >&2 "$0: no backup volumes attached"; exit 1 ;;
esac
vg=$vgprefix$tag

vgchange -ay $vg
mount /dev/$vg/meta $METADIR

cryptop decrypt backup <$METADIR/crypt.blob |
	cryptsetup luksOpen --key-file=- /dev/$vg/crypt cbackup
mount /dev/mapper/cbackup $STOREDIR
Commit	Line	Data
f6b4ffdc MW	1	#! /bin/sh -ex
	2
	3	: ${vgtag=@backup} ${vgprefix=vg-backup-}
	4	: ${mntbkpdir=/mnt/bkp}
	5	: ${STOREDIR=$mntbkpdir/store} ${METADIR=$mntbkpdir/meta}
	6
	7	vgs=$(vgs --noheadings -oname)
	8	found=nil
	9	for vg in $vgs; do
	10	case "$found,$vg" in
	11	nil,$vgprefix*)
	12	found=t
	13	tag=${vg#$vgprefix}
	14	;;
	15	t,$vgprefix*)
	16	echo >&2 "$0: multiple backup volumes attached"
	17	exit 1
	18	;;
	19	esac
	20	done
	21	case $found in
	22	nil) echo >&2 "$0: no backup volumes attached"; exit 1 ;;
	23	esac
	24	vg=$vgprefix$tag
	25
	26	vgchange -ay $vg
	27	mount /dev/$vg/meta $METADIR
	28
	29	cryptop decrypt backup <$METADIR/crypt.blob \|
	30	cryptsetup luksOpen --key-file=- /dev/$vg/crypt cbackup
	31	mount /dev/mapper/cbackup $STOREDIR