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live
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#!/bin/sh
# set -e
export PATH="/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
echo "/root/lib" >> /etc/ld.so.conf
echo "/root/usr/lib" >> /etc/ld.so.conf
mountpoint="/live/image"
LIVE_MEDIA_PATH="live"
root_persistence="live-rw"
home_persistence="home-rw"
root_snapshot_label="live-sn"
home_snapshot_label="home-sn"
USERNAME="user"
USERFULLNAME="Live user"
HOSTNAME="host"
mkdir -p "${mountpoint}"
[ -f /etc/live.conf ] && . /etc/live.conf
export USERNAME USERFULLNAME HOSTNAME
. /scripts/live-helpers
if [ ! -f /live.vars ]
then
touch /live.vars
fi
Arguments ()
{
PRESEEDS=""
for ARGUMENT in $(cat /proc/cmdline)
do
case "${ARGUMENT}" in
access=*)
ACCESS="${ARGUMENT#access=}"
export ACCESS
;;
console=*)
DEFCONSOLE="${ARGUMENT#*=}"
export DEFCONSOLE
;;
debug)
DEBUG="Yes"
export DEBUG
set -x
;;
fetch=*)
FETCH="${ARGUMENT#fetch=}"
export FETCH
;;
hook=*)
HOOK="${ARGUMENT#hook=}"
export HOOK
;;
hostname=*)
HOSTNAME="${ARGUMENT#hostname=}"
LIVECONF="changed"
export HOSTNAME LIVECONF
;;
username=*)
USERNAME="${ARGUMENT#username=}"
LIVECONF="changed"
export USERNAME LIVECONF
;;
userfullname=*)
USERFULLNAME="${ARGUMENT#userfullname=}"
LIVECONF="changed"
export USERFULLNAME LIVECONF
;;
ignore_uuid)
IGNORE_UUID="Yes"
export IGNORE_UUID
;;
ip=*)
STATICIP="${ARGUMENT#ip=}"
if [ -z "${STATICIP}" ]
then
STATICIP="frommedia"
fi
export STATICIP
;;
keyb=*|kbd-chooser/method=*)
KBD="${ARGUMENT#*=}"
export KBD
;;
klayout=*|console-setup/layoutcode=*)
KLAYOUT="${ARGUMENT#*=}"
export KLAYOUT
;;
kvariant=*|console-setup/variantcode=*)
KVARIANT="${ARGUMENT#*=}"
export KVARIANT
;;
kmodel=*|console-setup/modelcode=*)
KMODEL="${ARGUMENT#*=}"
export KMODEL
;;
koptions=*)
KOPTIONS="${ARGUMENT#koptions=}"
export KOPTIONS
;;
live-getty)
LIVE_GETTY="1"
export LIVE_GETTY
;;
live-media=*|bootfrom=*)
LIVE_MEDIA="${ARGUMENT#*=}"
export LIVE_MEDIA
;;
live-media-encryption=*|encryption=*)
LIVE_MEDIA_ENCRYPTION="${ARGUMENT#*=}"
export LIVE_MEDIA_ENCRYPTION
;;
live-media-offset=*)
LIVE_MEDIA_OFFSET="${ARGUMENT#live-media-offset=}"
export LIVE_MEDIA_OFFSET
;;
live-media-path=*)
LIVE_MEDIA_PATH="${ARGUMENT#live-media-path=}"
export LIVE_MEDIA_PATH
;;
live-media-timeout=*)
LIVE_MEDIA_TIMEOUT="${ARGUMENT#live-media-timeout=}"
export LIVE_MEDIA_TIMEOUT
;;
language=*|debian-installer/language=*)
language=${x#debian-installer/language=}
locale="$(lang2locale "$language")"
set_locale="true"
;;
locale=*|debian-installer/locale=*)
LOCALE="${ARGUMENT#*=}"
export LOCALE
;;
module=*)
MODULE="${ARGUMENT#module=}"
export MODULE
;;
netboot=*)
NETBOOT="${ARGUMENT#netboot=}"
export NETBOOT
;;
nfsopts=*)
NFSOPTS="${ARGUMENT#nfsopts=}"
export NFSOPTS
;;
nfscow=*)
NFS_COW="${ARGUMENT#nfscow=}"
export NFS_COW
;;
noaccessibility)
NOACCESSIBILITY="Yes"
export NOACCESSIBILITY
;;
noapparmor)
NOAPPARMOR="Yes"
export NOAPPARMOR
;;
noaptcdrom)
NOAPTCDROM="Yes"
export NOAPTCDROM
;;
noautologin)
NOAUTOLOGIN="Yes"
export NOAUTOLOGIN
;;
noxautologin)
NOXAUTOLOGIN="Yes"
export NOXAUTOLOGIN
;;
noconsolekeyboard)
NOCONSOLEKEYBOARD="Yes"
export NOCONSOLEKEYBOARD
;;
nofastboot)
NOFASTBOOT="Yes"
export NOFASTBOOT
;;
nofstab)
NOFSTAB="Yes"
export NOFSTAB
;;
nognomepanel)
NOGNOMEPANEL="Yes"
export NOGNOMEPANEL
;;
nohosts)
NOHOSTS="Yes"
export NOHOSTS
;;
nokpersonalizer)
NOKPERSONALIZER="Yes"
export NOKPERSONALIZER
;;
nolanguageselector)
NOLANGUAGESELECTOR="Yes"
export NOLANGUAGESELECTOR
;;
nolocales)
NOLOCALES="Yes"
export NOLOCALES
;;
nonetworking)
NONETWORKING="Yes"
export NONETWORKING
;;
nopowermanagement)
NOPOWERMANAGEMENT="Yes"
export NOPOWERMANAGEMENT
;;
noprogramcrashes)
NOPROGRAMCRASHES="Yes"
export NOPROGRAMCRASHES
;;
norestrictedmanager)
NORESTRICTEDMANAGER="Yes"
export NORESTRICTEDMANAGER
;;
nosudo)
NOSUDO="Yes"
export NOSUDO
;;
noswap)
NOSWAP="Yes"
export NOSWAP
;;
noupdatenotifier)
NOUPDATENOTIFIER="Yes"
export NOUPDATENOTIFIER
;;
nouser)
NOUSER="Yes"
export NOUSER
;;
noxautoconfig)
NOXAUTOCONFIG="Yes"
export NOXAUTOCONFIG
;;
noxscreensaver)
NOXSCREENSAVER="Yes"
export NOXSCREENSAVER
;;
persistent)
PERSISTENT="Yes"
export PERSISTENT
;;
nopersistent)
NOPERSISTENT="Yes"
export NOPERSISTENT
;;
preseed/file=*|file=*)
LOCATION="${ARGUMENT#*=}"
export LOCATION
;;
nopreseed)
NOPRESEED="Yes"
export NOPRESEED
;;
url=*)
location="${ARGUMENT#url=}"
mount -n -o bind /sys /root/sys
mount -n -o bind /proc /root/proc
mount -n -o bind /dev /root/dev
mkdir -p /root/var/run/network
chroot /root dhclient eth0
chroot /root wget -P /tmp "${location}"
chroot /root ifconfig eth0 down
umount /root/sys
umount /root/proc
umount /root/dev
LOCATION="/tmp/$(basename "${location}")"
;;
*/*=*)
question="${ARGUMENT%%=*}"
value="${ARGUMENT#*=}"
PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
export PRESEEDS
;;
showmounts)
SHOWMOUNTS="Yes"
export SHOWMOUNTS
;;
textonly)
TEXTONLY="Yes"
export TEXTONLY
;;
timezone=*)
TIMEZONE="${ARGUMENT#timezone=}"
export TIMEZONE
;;
notimezone)
NOTIMEZONE="Yes"
export NOTIMEZONE
;;
todisk=*)
TODISK="${ARGUMENT#todisk=}"
export TODISK
;;
toram)
TORAM="Yes"
export TORAM
;;
toram=*)
TORAM="Yes"
MODULETORAM="${ARGUMENT#toram=}"
export TORAM MODULETORAM
;;
exposedroot)
EXPOSED_ROOT="Yes"
export EXPOSED_ROOT
;;
plainroot)
PLAIN_ROOT="Yes"
export PLAIN_ROOT
;;
root=*)
ROOT="${ARGUMENT#root=}"
export ROOT
;;
union=*)
UNIONTYPE="${ARGUMENT#union=}"
export UNIONTYPE
;;
utc=*)
UTC="${ARGUMENT#utc=}"
export UTC
;;
xdebconf)
XDEBCONF="Yes"
export XDEBCONF
;;
xdriver=*)
XDRIVER="${ARGUMENT#xdriver=}"
export XDRIVER
;;
xvideomode=*)
XVIDEOMODE="${ARGUMENT#xvideomode=}"
export XVIDEOMODE
;;
esac
done
# sort of compatibility with netboot.h from linux docs
if [ -z "${NETBOOT}" ]
then
if [ "${ROOT}" = "/dev/nfs" ]
then
NETBOOT="nfs"
export NETBOOT
elif [ "${ROOT}" = "/dev/cifs" ]
then
NETBOOT="cifs"
export NETBOOT
fi
fi
if [ -z "${MODULE}" ]
then
MODULE="filesystem"
export MODULE
fi
if [ -z "${UNIONTYPE}" ]
then
UNIONTYPE="unionfs"
export UNIONTYPE
fi
}
is_live_path ()
{
DIRECTORY="${1}"
if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
then
for FILESYSTEM in squashfs ext2 ext3 xfs dir jffs2
do
if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
then
return 0
fi
done
fi
return 1
}
matches_uuid ()
{
if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
then
return 0
fi
path="${1}"
uuid="$(cat /conf/uuid.conf)"
for try_uuid_file in "${mountpoint}/.disk/casper-uuid"*
do
[ -e "${try_uuid_file}" ] || continue
try_uuid="$(cat "${try_uuid_file}")"
if [ "${uuid}" = "${try_uuid}" ]
then
return 0
fi
done
return 1
}
get_backing_device ()
{
case "${1}" in
*.squashfs|*.ext2|*.ext3|*.jffs2)
echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}")
;;
*.dir)
echo "directory"
;;
*)
panic "Unrecognized live filesystem: ${1}"
;;
esac
}
match_files_in_dir ()
{
# Does any files match pattern ${1} ?
local pattern="${1}"
if [ "$(echo ${pattern})" != "${pattern}" ]
then
return 0
fi
return 1
}
mount_images_in_directory ()
{
directory="${1}"
rootmnt="${2}"
mac="${3}"
if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
then
[ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
else
:
fi
}
is_nice_device ()
{
sysfs_path="${1#/sys}"
if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"
then
return 0
fi
return 1
}
is_supported_fs ()
{
# FIXME: do something better like the scan of supported filesystems
fstype="${1}"
case ${fstype} in
vfat|iso9660|udf|ext2|ext3|ntfs|jffs2)
return 0
;;
esac
return 1
}
copy_live_to ()
{
copyfrom="${1}"
copytodev="${2}"
copyto="${copyfrom}_swap"
if [ -z "${MODULETORAM}" ]
then
size=$(fs_size "" ${copyfrom} "used")
else
MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
if [ -f "${MODULETORAMFILE}" ]
then
size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
else
log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
return 1
fi
fi
if [ "${copytodev}" = "ram" ]
then
# copying to ram:
freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) )
mount_options="-o size=${size}k"
free_string="memory"
fstype="tmpfs"
dev="/dev/shm"
else
# it should be a writable block device
if [ -b "${copytodev}" ]
then
dev="${copytodev}"
free_string="space"
fstype=$(get_fstype "${dev}")
freespace=$(fs_size "${dev}")
else
[ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device."
return 1
fi
fi
if [ "${freespace}" -lt "${size}" ]
then
[ "${quiet}" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
return 1
fi
# begin copying (or uncompressing)
mkdir "${copyto}"
echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
if [ "${extension}" = "tgz" ]
then
cd "${copyto}"
tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
mount -r --move "${copyto}" "${rootmnt}"
cd "${OLDPWD}"
else
if [ -n "${MODULETORAMFILE}" ]
then
cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
else
cp -a ${copyfrom}/* ${copyto} # "cp -a" from busybox also copies hidden files
fi
livefs_root
umount ${copyfrom}
mount -r --move ${copyto} ${copyfrom}
fi
rmdir ${copyto}
return 0
}
do_netmount ()
{
rc=1
modprobe -q af_packet # For DHCP
udevtrigger
udevsettle
ipconfig ${DEVICE} | tee /netboot.config
# source relevant ipconfig output
OLDHOSTNAME=${HOSTNAME}
. /tmp/net-${DEVICE}.conf
[ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
export HOSTNAME
if [ "${NFSROOT}" = "auto" ]
then
NFSROOT=${ROOTSERVER}:${ROOTPATH}
fi
if [ -n "${FETCH}" ] && do_httpmount
then
rc=0
return ${rc}
fi
if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
then
NFSROOT=${ROOTSERVER}:${NFSROOT}
fi
[ "${quiet}" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
then
rc=0
elif do_nfsmount
then
NETBOOT="nfs"
export NETBOOT
rc=0
fi
[ "${quiet}" != "y" ] && log_end_msg
return ${rc}
}
do_httpmount ()
{
rc=1
extension=$(echo "${FETCH}" | sed 's/\(.*\)\.\(.*\)/\2/')
case "${extension}" in
squashfs|tgz|tar)
[ "${quiet}" != "y" ] && log_begin_msg "Trying wget ${FETCH} -O ${mountpoint}/$(basename ${FETCH})"
mkdir -p "${mountpoint}/${LIVE_MEDIA_PATH}"
wget "${FETCH}" -O "${mountpoint}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
[ ${?} -eq 0 ] && rc=0
[ "${extension}" = "tgz" ] && live_dest="ram"
;;
*)
[ "${quiet}" != "y" ] && log_begin_msg "Unrecognized archive extension for ${FETCH}"
esac
return ${rc}
}
do_nfsmount ()
{
rc=1
modprobe -q nfs
if [ -z "${NFSOPTS}" ]
then
NFSOPTS=""
fi
[ "${quiet}" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
# FIXME: This for loop is an ugly HACK round an nfs bug
for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13
do
nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
sleep 1
done
return ${rc}
}
do_cifsmount ()
{
rc=1
if [ -x "/sbin/mount.cifs" ]
then
if [ -z "${NFSOPTS}" ]
then
CIFSOPTS="-ouser=root,password="
else
CIFSOPTS="${NFSOPTS}"
fi
[ "${quiet}" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
modprobe -q cifs
if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
then
rc=0
fi
fi
return ${rc}
}
do_snap_copy ()
{
fromdev="${1}"
todir="${2}"
snap_type="${3}"
size=$(fs_size "${fromdev}" "" "used")
if [ -b "${fromdev}" ]
then
# look for free mem
if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
then
todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' )
freespace=$(df -k | grep -s ${todev} | awk '{print $4}')
else
freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
fi
tomount="/mnt/tmpsnap"
if [ ! -d "${tomount}" ]
then
mkdir -p "${tomount}"
fi
fstype=$(get_fstype "${fromdev}")
if [ -n "${fstype}" ]
then
# Copying stuff...
mount -t "${fstype}" -o ro,noatime "${fromdev}" "${tomount}"
cp -a "${tomount}"/* ${todir}
umount "${tomount}"
else
log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
fi
rmdir "${tomount}"
if echo ${fromdev} | grep -qs loop
then
losetup -d "${fromdev}"
fi
return 0
else
return 1
[ "${quiet}" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium"
fi
}
try_snap ()
{
# Look for ${snap_label}.* in block devices and copy the contents to ${snap_mount}
# and remember the device and filename for resync on exit in live-initramfs.init
snap_label="${1}"
snap_mount="${2}"
snap_type="${3}"
snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3 ${snap_label}.jffs2")
if [ ! -z "${snapdata}" ]
then
snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|jffs2\)'
then
# squashfs, jffs2 or ext2/ext3 snapshot
dev=$(get_backing_device "${snapback}/${snapfile}")
if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
then
log_warning_msg "Impossible to include the ${snapfile} Snapshot"
return 1
fi
else
# cpio.gz snapshot
if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i -u -d 2>/dev/null)
then
log_warning_msg "Impossible to include the ${snapfile} Snapshot"
return 1
fi
fi
umount "${snapback}"
else
dev=$(find_cow_device "${snap_label}")
if [ -b ${dev} ]
then
if echo "${dev}" | grep -qs loop
then
# strange things happens, user confused?
snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
snapfile=$(basename ${snaploop})
snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
else
snapdev="${dev}"
fi
if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
then
log_warning_msg "Impossible to include the ${snap_label} Snapshot"
return 1
else
if [ -n "${snapfile}" ]
then
# it was a loop device, user confused
umount ${snapdev}
fi
fi
else
log_warning_msg "Impossible to include the ${snap_label} Snapshot"
return 1
fi
fi
echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
return 0
}
setup_unionfs ()
{
image_directory="${1}"
rootmnt="${2}"
addimage_directory="${3}"
modprobe -q -b ${UNIONTYPE}
# run-init can't deal with images in a subdir, but we're going to
# move all of these away before it runs anyway. No, we're not,
# put them in / since move-mounting them into / breaks mono and
# some other apps.
croot="/"
# Let's just mount the read-only file systems first
rofsstring=""
rofslist=""
minor_kernel_version=$(uname -r|cut -c 5-|sed 's/[^0-9].*//')
if [ "${NETBOOT}" = "nfs" ] && [ "${minor_kernel_version}" -lt 22 ]
then
# go aroung a bug in nfs-unionfs locking for unionfs <= 1.4
roopt="nfsro"
elif [ "${UNIONTYPE}" = "aufs" ]
then
roopt="rr"
else
roopt="ro"
fi
# Read image names from ${MODULE}.module if it exists
if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
then
for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
do
image_string="${image_string} ${image_directory}/${IMAGE}"
done
elif [ -e "${image_directory}/${MODULE}.module" ]
then
for IMAGE in $(cat ${image_directory}/${MODULE}.module)
do
image_string="${image_string} ${image_directory}/${IMAGE}"
done
else
# ${MODULE}.module does not exist, create a list of images
for FILESYSTEM in squashfs ext2 ext3 xfs jffs2 dir
do
for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
do
if [ -e "${IMAGE}" ]
then
image_string="${image_string} ${IMAGE}"
fi
done
done
if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
then
for FILESYSTEM in squashfs ext2 ext3 xfs jffs2 dir
do
for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
do
if [ -e "${IMAGE}" ]
then
image_string="${image_string} ${IMAGE}"
fi
done
done
fi
# Now sort the list
image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
fi
[ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
mkdir -p "${croot}"
for image in ${image_string}
do
imagename=$(basename "${image}")
if [ -d "${image}" ]
then
# it is a plain directory: do nothing
rofsstring="${image}=${roopt}:${rofsstring}"
rofslist="${image} ${rofslist}"
elif [ -f "${image}" ]
then
backdev=$(get_backing_device "${image}")
fstype=$(get_fstype "${backdev}")
if [ "${fstype}" = "unknown" ]
then
panic "Unknown file system type on ${backdev} (${image})"
fi
mkdir -p "${croot}/${imagename}"
echo "debug: Mounting backdev \"${backdev}\" (image = ${image}) on croot/imagename \"${croot}/${imagename}\""
mount -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
fi
done
rofsstring=${rofsstring%:}
mkdir -p /cow
# Looking for "${root_persistence}" device or file