+ sleep 1
+
+ if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
+ then
+ break
+ fi
+ done
+
+ # search for label and files (this could be hugely optimized)
+ cowprobe=$(find_cow_device "${root_persistence}")
+ if [ -b "${cowprobe}" ]
+ then
+ # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
+ # makes sense to have both persistence for /cow and /home mounted, maybe also with
+ # snapshots to be sure to really store some e.g key config files,
+ # but not on the same media
+ blacklistdev="${cowprobe}"
+ PERSISTENCE_IS_ON="1"
+ export PERSISTENCE_IS_ON
+ fi
+ # homecow just mount something on /home, this should be generalized some way
+ homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
+ if [ -b "${homecow}" ]
+ then
+ PERSISTENCE_IS_ON="1"
+ export PERSISTENCE_IS_ON
+ fi
+ root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
+ # This second type should be removed when snapshot will get smarter,
+ # hence when "/etc/live-snapshot*list" will be supported also by
+ # ext2|ext3|ext4|jffs2 snapshot types.
+ home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
+
+ if [ -b "${cowprobe}" ]
+ then
+ cowdevice=${cowprobe}
+ cow_fstype=$(get_fstype "${cowprobe}")
+ cow_mountopt="rw,noatime"
+
+ if [ "${FORCEPERSISTENTFSCK}" = "Yes" ]
+ then
+ fsck -y ${cowdevice}
+ fi
+ else
+ log_warning_msg "Unable to find the persistent medium"
+ cowdevice="tmpfs"
+ cow_fstype="tmpfs"
+ cow_mountopt="rw,noatime,mode=755"
+ fi
+ elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENT}" ]
+ then
+ # check if there are any nfs options
+ if echo ${NFS_COW}|grep -q ','
+ then
+ nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
+ nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
+ else
+ nfs_cow_opts="-o nolock"
+ nfs_cow=${NFS_COW}
+ fi
+ mac="$(get_mac)"
+ if [ -n "${mac}" ]
+ then
+ cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
+ cow_fstype="nfs"
+ else
+ panic "unable to determine mac address"
+ fi
+ else
+ cowdevice="tmpfs"
+ cow_fstype="tmpfs"
+ cow_mountopt="rw,noatime,mode=755"
+ fi
+
+ if [ "${cow_fstype}" = "nfs" ]
+ then
+ log_begin_msg \
+ "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
+ nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
+ panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
+ else
+ mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
+ panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
+ fi
+
+ rofscount=$(echo ${rofslist} |wc -w)
+
+ if [ -n "${EXPOSED_ROOT}" ]
+ then
+ if [ ${rofscount} -ne 1 ]
+ then
+ panic "only one RO file system supported with exposedroot: ${rofslist}"
+ fi
+ exposedrootfs=${rofslist%% }
+
+ mount --bind ${exposedrootfs} ${rootmnt} || \
+ panic "bind mount of ${exposedrootfs} failed"
+
+ if [ -z "${SKIP_UNION_MOUNTS}" ]
+ then
+ cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
+ else
+ cow_dirs=''
+ fi
+
+ for dir in ${cow_dirs}; do
+ mkdir -p /cow${dir}
+ mount -t ${UNIONTYPE} \
+ -o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro \
+ ${UNIONTYPE} "${rootmnt}${dir}" || \
+ panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option \
+ rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"