udevinfo='udevinfo'
fi
+root_overlay_label="full-ov"
+custom_overlay_label="custom-ov"
+root_snapshot_label="live-sn"
+home_snapshot_label="home-sn"
+persistence_list="live.persist"
+
+Arguments ()
+{
+ PRESEEDS=""
+ LOCATIONS=""
+
+ for ARGUMENT in $(cat /proc/cmdline)
+ do
+ case "${ARGUMENT}" in
+ skipconfig)
+ NOACCESSIBILITY="Yes"
+ NOFASTBOOT="Yes"
+ NOFSTAB="Yes"
+ NONETWORKING="Yes"
+
+ export NOACCESSIBILITY NOFASTBOOT NOFSTAB NONETWORKING
+ ;;
+
+ access=*)
+ ACCESS="${ARGUMENT#access=}"
+ export ACCESS
+ ;;
+
+ console=*)
+ DEFCONSOLE="${ARGUMENT#*=}"
+ export DEFCONSOLE
+ ;;
+
+ BOOTIF=*)
+ BOOTIF="${x#BOOTIF=}"
+ ;;
+
+ debug)
+ DEBUG="Yes"
+ export DEBUG
+
+ set -x
+ ;;
+
+ dhcp)
+ # Force dhcp even while netbooting
+ # Use for debugging in case somebody works on fixing dhclient
+ DHCP="Force";
+ export DHCP
+ ;;
+
+ nodhcp)
+ unset DHCP
+ ;;
+
+ ethdevice=*)
+ DEVICE="${ARGUMENT#ethdevice=}"
+ ETHDEVICE="${DEVICE}"
+ export DEVICE ETHDEVICE
+ ;;
+
+ ethdevice-timeout=*)
+ ETHDEV_TIMEOUT="${ARGUMENT#ethdevice-timeout=}"
+ export ETHDEV_TIMEOUT
+ ;;
+
+ fetch=*)
+ FETCH="${ARGUMENT#fetch=}"
+ export FETCH
+ ;;
+
+ forcepersistentfsck)
+ FORCEPERSISTENTFSCK="Yes"
+ export FORCEPERSISTENTFSCK
+ ;;
+
+ ftpfs=*)
+ FTPFS="${ARGUMENT#ftpfs=}"
+ export FTPFS
+ ;;
+
+ httpfs=*)
+ HTTPFS="${ARGUMENT#httpfs=}"
+ export HTTPFS
+ ;;
+
+ iscsi=*)
+ ISCSI="${ARGUMENT#iscsi=}"
+ #ip:port - separated by ;
+ ISCSI_PORTAL="${ISCSI%;*}"
+ if echo "${ISCSI_PORTAL}" | grep -q , ; then
+ ISCSI_SERVER="${ISCSI_PORTAL%,*}"
+ ISCSI_PORT="${ISCSI_PORTAL#*,}"
+ fi
+ #target name
+ ISCSI_TARGET="${ISCSI#*;}"
+ export ISCSI ISCSI_PORTAL ISCSI_TARGET ISCSI_SERVER ISCSI_PORT
+ ;;
+
+ isofrom=*|fromiso=*)
+ FROMISO="${ARGUMENT#*=}"
+ export FROMISO
+ ;;
+
+ ignore_uuid)
+ IGNORE_UUID="Yes"
+ export IGNORE_UUID
+ ;;
+
+ integrity-check)
+ INTEGRITY_CHECK="Yes"
+ export INTEGRITY_CHECK
+ ;;
+
+ ip=*)
+ STATICIP="${ARGUMENT#ip=}"
+
+ if [ -z "${STATICIP}" ]
+ then
+ STATICIP="frommedia"
+ fi
+
+ export STATICIP
+ ;;
+
+ 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="${ARGUMENT#live-media-timeout=}"
+ export LIVE_MEDIA_TIMEOUT
+ ;;
+
+ module=*)
+ MODULE="${ARGUMENT#module=}"
+ export MODULE
+ ;;
+
+ netboot=*)
+ NETBOOT="${ARGUMENT#netboot=}"
+ export NETBOOT
+ ;;
+
+ nfsopts=*)
+ NFSOPTS="${ARGUMENT#nfsopts=}"
+ export NFSOPTS
+ ;;
+
+ nfscow=*)
+ NFS_COW="${ARGUMENT#nfscow=}"
+ export NFS_COW
+ ;;
+
+ noaccessibility)
+ NOACCESSIBILITY="Yes"
+ export NOACCESSIBILITY
+ ;;
+
+ nofastboot)
+ NOFASTBOOT="Yes"
+ export NOFASTBOOT
+ ;;
+
+ nofstab)
+ NOFSTAB="Yes"
+ export NOFSTAB
+ ;;
+
+ nonetworking)
+ NONETWORKING="Yes"
+ export NONETWORKING
+ ;;
+
+ ramdisk-size=*)
+ ramdisk_size="${ARGUMENT#ramdisk-size=}"
+ ;;
+
+ swapon)
+ SWAPON="Yes"
+ export SWAPON
+ ;;
+
+ persistent)
+ PERSISTENT="Yes"
+ export PERSISTENT
+ ;;
+
+ persistent-encryption=*)
+ PERSISTENT_ENCRYPTION="${ARGUMENT#*=}"
+ export PERSISTENT_ENCRYPTION
+ ;;
+
+ persistent-media=*)
+ PERSISTENT_MEDIA="${ARGUMENT#*=}"
+ export PERSISTENT_MEDIA
+ ;;
+ persistent-method=*)
+ PERSISTENT_METHOD="${ARGUMENT#*=}"
+ export PERSISTENT_METHOD
+ ;;
+
+ persistent-path=*)
+ PERSISTENT_PATH="${ARGUMENT#persistent-path=}"
+ export PERSISTENT_PATH
+ ;;
+ persistent-read-only)
+ PERSISTENT_READONLY="Yes"
+ export PERSISTENT_READONLY
+ ;;
+
+ persistent-storage=*)
+ PERSISTENT_STORAGE="${ARGUMENT#persistent-storage=}"
+ export PERSISTENT_STORAGE
+ ;;
+
+ persistent-subtext=*)
+ root_overlay_label="${root_overlay_label}-${ARGUMENT#persistent-subtext=}"
+ custom_overlay_label="${custom_overlay_label}-${ARGUMENT#persistent-subtext=}"
+ root_snapshot_label="${root_snapshot_label}-${ARGUMENT#persistent-subtext=}"
+ home_snapshot_label="${home_snapshot_label}-${ARGUMENT#persistent-subtext=}"
+ ;;
+
+ nopersistent)
+ NOPERSISTENT="Yes"
+ export NOPERSISTENT
+ ;;
+
+ noprompt)
+ NOPROMPT="Yes"
+ export NOPROMPT
+ ;;
+
+ noprompt=*)
+ NOPROMPT="${ARGUMENT#noprompt=}"
+ export NOPROMPT
+ ;;
+
+ quickusbmodules)
+ QUICKUSBMODULES="Yes"
+ export QUICKUSBMODULES
+ ;;
+
+ preseed/file=*|file=*)
+ LOCATIONS="${ARGUMENT#*=} ${LOCATIONS}"
+ export LOCATIONS
+ ;;
+
+ nopreseed)
+ NOPRESEED="Yes"
+ export NOPRESEED
+ ;;
+
+ */*=*)
+ question="${ARGUMENT%%=*}"
+ value="${ARGUMENT#*=}"
+ PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
+ export PRESEEDS
+ ;;
+
+ showmounts)
+ SHOWMOUNTS="Yes"
+ export SHOWMOUNTS
+ ;;
+
+ silent)
+ SILENT="Yes"
+ export SILENT
+ ;;
+
+ 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
+ ;;
+
+ skipunion)
+ SKIP_UNION_MOUNTS="Yes"
+ export SKIP_UNION_MOUNTS
+ ;;
+
+ root=*)
+ ROOT="${ARGUMENT#root=}"
+ export ROOT
+ ;;
+
+ union=*)
+ UNIONTYPE="${ARGUMENT#union=}"
+ export UNIONTYPE
+ ;;
+ 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 "${UNIONTYPE}" ]
+ then
+ UNIONTYPE="aufs"
+ export UNIONTYPE
+ fi
+
+ if [ -z "${PERSISTENT_ENCRYPTION}" ]
+ then
+ PERSISTENT_ENCRYPTION="none"
+ export PERSISTENT_ENCRYPTION
+ elif echo ${PERSISTENT_ENCRYPTION} | grep -qe "\<luks\>"
+ then
+ if ! modprobe dm-crypt
+ then
+ log_warning_msg "Unable to load module dm-crypt"
+ PERSISTENT_ENCRYPTION=$(echo ${PERSISTENT_ENCRYPTION} | sed -e 's/\<luks,\|,\?luks$//g')
+ export PERSISTENT_ENCRYPTION
+ fi
+
+ if [ ! -x /lib/cryptsetup/askpass ] || [ ! -x /sbin/cryptsetup ]
+ then
+ log_warning_msg "cryptsetup in unavailable"
+ PERSISTENT_ENCRYPTION=$(echo ${PERSISTENT_ENCRYPTION} | sed -e 's/\<luks,\|,\?luks$//g')
+ export PERSISTENT_ENCRYPTION
+ fi
+ fi
+
+ if [ -z "${PERSISTENT_METHOD}" ]
+ then
+ PERSISTENT_METHOD="snapshot,overlay"
+ export PERSISTENT_METHOD
+ fi
+
+ if [ -z "${PERSISTENT_STORAGE}" ]
+ then
+ PERSISTENT_STORAGE="filesystem,file"
+ export PERSISTENT_STORAGE
+ fi
+}
+
sys2dev ()
{
sysdev=${1#/sys}
done
}
+probe_for_fs_label () {
+ local overlays="${1}"
+ local snapshots="${2}"
+ local dev="${3}"
+
+ for label in ${overlays} ${snapshots}
+ do
+ if [ "$(/sbin/blkid -s LABEL -o value $dev 2>/dev/null)" = "${label}" ]
+ then
+ echo "${label}=${dev}"
+ fi
+ done
+}
+
+probe_for_file_name () {
+ local overlays="${1}"
+ local snapshots="${2}"
+ local dev="${3}"
+
+ local devfstype="$(get_fstype ${dev})"
+ local backing="${rootmnt}/live/persistent/$(basename ${dev})"
+ local ret=""
+ if is_supported_fs ${devfstype} && mkdir -p "${backing}" && \
+ try_mount "${dev}" "${backing}" "rw" "${devfstype}"
+ then
+ for label in ${overlays}
+ do
+ path=${backing}/${PERSISTENT_PATH}${label}
+ if [ -f "${path}" ]
+ then
+ local loopdev=$(setup_loop "${path}" "loop" "/sys/block/loop*")
+ ret="${ret} ${label}=${loopdev}"
+ fi
+ done
+ for label in ${snapshots}
+ do
+ for ext in squashfs cpio.gz ext2 ext3 ext4 jffs2
+ do
+ path="${PERSISTENT_PATH}${label}.${ext}"
+ if [ -f "${backing}/${path}" ]
+ then
+ ret="${ret} ${label}=${dev}:${backing}:${path}"
+ fi
+ done
+ done
+
+ if [ -n "${ret}" ]
+ then
+ echo ${ret}
+ else
+ umount ${backing} > /dev/null 2>&1 || true
+ fi
+ fi
+}
+
find_persistent_media ()
{
# Scans devices for overlays and snapshots, and returns a whitespace
snapshots="${2}"
black_listed_devices="${3}"
white_listed_devices="${4}"
+ persistent_backing="${rootmnt}/live/persistent"
for dev in $(storage_devices "${black_listed_devices}" "${white_listed_devices}")
do
continue
fi
+ # Probe for filesystems with matching label
if echo ${PERSISTENT_STORAGE} | grep -qe "\<filesystem\>"
then
- for label in ${overlays} ${snapshots}
- do
- if [ "$(/sbin/blkid -s LABEL -o value $dev 2>/dev/null)" = "${label}" ]
- then
- overlays=$(echo ${overlays} | sed -e "s|\<${label}\>||")
- snapshots=$(echo ${snapshots} | sed -e "s|\<${label}\>||")
- echo "${label}=${dev}"
- # skip to the next device
- continue 2
- fi
- done
+ result=$(probe_for_fs_label "${overlays}" "${snapshots}" ${dev})
+ if [ -n "${result}" ]
+ then
+ ret="${ret} ${result}"
+ continue
+ fi
fi
+ # Probe for files with matching name on mounted partition
if echo ${PERSISTENT_STORAGE} | grep -qe "\<file\>"
then
- devfstype="$(get_fstype ${dev})"
- overlay_on_dev=""
- snapshot_on_dev=""
- backing="/$(basename ${dev})-backing"
- mkdir -p "${backing}"
- if is_supported_fs ${devfstype} && try_mount "${dev}" "${backing}" "rw" "${devfstype}"
- then
- for label in ${overlays}
- do
- path=${backing}/${PERSISTENT_PATH}${label}
- if [ -f "${path}" ]
- then
- overlays=$(echo ${overlays} | sed -e "s|\<${label}\>||")
- overlay_on_dev="yes"
- echo "${label}=$(setup_loop "${path}" "loop" "/sys/block/loop*")"
- fi
- done
-
- for label in ${snapshots}
- do
- for ext in squashfs cpio.gz ext2 ext3 ext4 jffs2
- do
- path="${PERSISTENT_PATH}${label}.${ext}"
- if [ -f "${backing}/${path}" ]
- then
- snapshots=$(echo ${snapshots} | sed -e "s|\<${label}\>||")
- snapshot_on_dev="yes"
- echo "${label}=${dev}:${backing}:${path}"
- fi
- done
- done
- fi
- if [ -z "${overlay_on_dev}" ]
+ result=$(probe_for_file_name "${overlays}" "${snapshots}" ${dev})
+ if [ -n "${result}" ]
then
- umount ${backing} > /dev/null 2>&1 || true
- if [ -z "${snapshot_on_dev}" ] && [ -n "${luks_device}" ] && /sbin/cryptsetup status "${luks_device}" 1> /dev/null
- then
- /sbin/cryptsetup luksClose "${luks_device}"
- fi
+ ret="${ret} ${result}"
+ continue
fi
fi
+
+ # Close luks device if it isn't used
+ if [ -z "${result}" ] && [ -n "${luks_device}" ] && \
+ /sbin/cryptsetup status "${luks_device}" 1> /dev/null 2>&1
+ then
+ /sbin/cryptsetup luksClose "${luks_device}"
+ fi
done
+
+ if [ -n "${ret}" ]
+ then
+ echo ${ret}
+ fi
}
get_mac ()
fi
link_files "${src}" "${dest}" "${src_mask}"
else
- if [ -e "${dest}" ];
- then
- rm -rf "${dest}"
- fi
- if [ -n "${src}" ];
+ if [ -n "${src_mask}" ]
then
src="$(echo ${src} | sed "s|^${src_mask}||")"
fi
+ rm -rf "${dest}" 2> /dev/null
ln -s "${src}" "${dest}"
fi
done
}
+
+do_union () {
+ local unionmountpoint="${1}" # directory where the union is mounted
+ local unionrw="${2}" # branch where the union changes are stored
+ local unionro1="${3}" # first underlying read-only branch (optional)
+ local unionro2="${4}" # second underlying read-only branch (optional)
+
+ if [ "${UNIONTYPE}" = "aufs" ]
+ then
+ rw_opt="rw"
+ ro_opt="rr+wh"
+ noxino_opt="noxino"
+ elif [ "${UNIONTYPE}" = "unionfs-fuse" ]
+ then
+ rw_opt="RW"
+ ro_opt="RO"
+ else
+ rw_opt="rw"
+ ro_opt="ro"
+ fi
+
+ case "${UNIONTYPE}" in
+ unionfs-fuse)
+ unionmountopts="-o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid"
+ unionmountopts="${unionmountopts} ${unionrw}=${rw_opt}"
+ if [ -n "${unionro1}" ]
+ then
+ unionmountopts="${unionmountopts}:${unionro1}=${ro_opt}"
+ fi
+ if [ -n "${unionro2}" ]
+ then
+ unionmountopts="${unionmountopts}:${unionro2}=${ro_opt}"
+ fi
+ ( sysctl -w fs.file-max=391524 ; ulimit -HSn 16384
+ unionfs-fuse ${unionmountopts} "${unionmountpoint}" ) && \
+ ( mkdir -p /run/sendsigs.omit.d
+ pidof unionfs-fuse >> /run/sendsigs.omit.d/unionfs-fuse || true )
+ ;;
+
+ overlayfs)
+ # XXX: can unionro2 be used? (overlayfs only handles two dirs, but perhaps they can be chained?)
+ # XXX: and can unionro1 be optional? i.e. can overlayfs skip lowerdir?
+ unionmountopts="-o noatime,lowerdir=${unionro1},upperdir=${unionrw}"
+ mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
+ ;;
+
+ *)
+ unionmountopts="-o noatime,${noxino_opt},dirs=${unionrw}=${rw_opt}"
+ if [ -n "${unionro1}" ]
+ then
+ unionmountopts="${unionmountopts}:${unionro1}=${ro_opt}"
+ fi
+ if [ -n "${unionro2}" ]
+ then
+ unionmountopts="${unionmountopts}:${unionro2}=${ro_opt}"
+ fi
+ mount -t ${UNIONTYPE} ${unionmountopts} ${UNIONTYPE} "${unionmountpoint}"
+ ;;
+ esac
+}
+
+get_custom_mounts () {
+ # Side-effect: leaves $devices with live.persist mounted in ${rootmnt}/live/persistent
+ # Side-effect: prints info to file $custom_mounts
+
+ local devices="${1}"
+ local custom_mounts="${2}" # print result to this file
+ local rootmnt="${3}" # should be set empty post-live-boot
+
+ local bindings="/bindings.list"
+ local links="/links.list"
+ rm -rf ${bindings} ${links} 2> /dev/null
+ local persistent_backing="${rootmnt}/live/persistent"
+
+ for device in ${devices}
+ do
+ if [ ! -b "${device}" ]
+ then
+ continue
+ fi
+ local device_name="$(basename ${device})"
+ local backing="${persistent_backing}/${device_name}"
+ mkdir -p "${backing}"
+ local device_fstype="$(get_fstype ${device})"
+ if [ -z "${PERSISTENT_READONLY}" ]
+ then
+ device_mount_opts="rw,noatime"
+ else
+ device_mount_opts="ro,noatime"
+ fi
+ local device_used=""
+ mount -t "${device_fstype}" -o "${device_mount_opts}" "${device}" "${backing}"
+ local include_list="${backing}/${persistence_list}"
+ if [ ! -r "${include_list}" ]
+ then
+ umount "${backing}"
+ rmdir "${backing}"
+ continue
+ fi
+
+ [ "${DEBUG}" = "Yes" ] && cp ${include_list} ${persistent_backing}/${persistence_list}.${device_name}
+ while read source dest options # < ${include_list}
+ do
+ if echo ${source} | grep -qe "^[[:space:]]*\(#.*\)\?$"
+ then
+ # skipping empty or commented lines
+ continue
+ fi
+
+ if echo ${dest} | grep -qe "^[^/]"
+ then
+ options="${dest}"
+ dest="${source}"
+ elif [ -z "${dest}" ]
+ then
+ dest="${source}"
+ fi
+
+ if echo ${dest} | grep -qe "^/\+$\|^/\+live\(/.*\)\?$"
+ then
+ # mounting on / or /live could cause trouble
+ log_warning_msg "Skipping unsafe custom mount on ${dest}"
+ continue
+ fi
+
+ for opt in $(echo ${options} | tr ',' ' ');
+ do
+ case "${opt}" in
+ linkfiles|union)
+ ;;
+ *)
+ log_warning_msg "Skipping custom mount with unkown option: ${opt}"
+ continue 2
+ ;;
+ esac
+ done
+
+ # FIXME: handle case: we already have /a/b in
+ # $bindings added from current $device, but
+ # now we find /a -- /a should replace /a/b in
+ # $bindings.
+
+ # FIXME: handle case: we have /a in $bindings
+ # from current $device, now we find /a/b, so
+ # we skip /a/b
+
+ # ensure that no multiple-/ occur in paths
+ local full_source="$(echo ${backing}/${source}/ | sed -e 's|/\+|/|g')"
+ local full_dest="$(echo ${rootmnt}/${dest}/ | sed -e 's|/\+|/|g')"
+ device_used="yes"
+ if echo ${options} | grep -qe "\<linkfiles\>";
+ then
+ echo "${full_source} ${full_dest} ${options}" >> ${links}
+ else
+ echo "${full_source} ${full_dest} ${options}" >> ${bindings}
+ fi
+ done < ${include_list}
+
+ if [ -z "${device_used}" ]
+ then
+ # this device was not used for / earlier, or
+ # custom mount point now, so it's useless
+ umount "${backing}"
+ rmdir "${backing}"
+ fi
+ done
+
+ # We sort the list according to destination so we're sure that
+ # we won't hide a previous mount. We also ignore duplicate
+ # destinations in a more or less arbitrary way.
+ [ -e "${bindings}" ] && sort -k2 -sbu ${bindings} >> ${custom_mounts}
+ rm ${bindings}
+
+ # After all mounts are considered we add symlinks so they
+ # won't be hidden by some mount.
+ [ -e "${links}" ] && sort -k2 -sbu ${links} >> ${custom_mounts}
+ rm ${links}
+
+ rm -f ${bindings} ${links} 2> /dev/null
+ echo ${custom_mounts}
+}
+
+do_custom_mounts () {
+ local custom_mounts="${1}" # the ouput from get_custom_mounts()
+ local rootmnt="${2}" # should be set empty post-live-boot
+
+ while read source dest options # < ${custom_mounts}
+ do
+ local opt_linkfiles=""
+ local opt_union=""
+ for opt in $(echo ${options} | tr ',' ' ');
+ do
+ case "${opt}" in
+ linkfiles)
+ opt_linkfiles="yes"
+ ;;
+ union)
+ opt_union="yes"
+ ;;
+ esac
+ done
+
+ if mountpoint -q "${dest}";
+ then
+ log_warning_msg "Skipping custom mount ${source} on ${dest}: destination is already a mount point"
+ continue
+ fi
+
+ # FIXME: we don't handle already existing
+ # non-directory files in the paths of both $source and
+ # $dest.
+
+ if [ ! -d "${dest}" ]
+ then
+ # if ${dest} is in /home/$user, try fixing
+ # proper ownership
+ # FIXME: this should really be handled by
+ # live-config since we don't know for sure
+ # which uid a certain user has until then
+ if echo ${dest} | grep -qe "^${rootmnt}/*home/\+[^/]\+"
+ then
+ path="/"
+ for dir in $(echo ${dest} | sed -e 's|/\+| |g')
+ do
+ path=${path}/${dir}
+ if [ ! -e ${path} ]
+ then
+ mkdir -p ${path}
+ # assume that the intended user is the first, which is usually the case
+ chown 1000:1000 ${path}
+ fi
+ done
+ else
+ mkdir -p ${dest}
+ fi
+ fi
+
+ # if ${source} doesn't exist on our persistent media
+ # we bootstrap it with $dest from the live filesystem.
+ # this both makes sense and is critical if we're
+ # dealing with /etc or other system dir.
+ if [ ! -d "${source}" ]
+ then
+ if [ -n "${PERSISTENT_READONLY}" ] || [ -n "${opt_linkfiles}" ]
+ then
+ continue
+ elif [ -n "${opt_union}" ]
+ then
+ # union's don't need to be bootstrapped
+ mkdir "${source}"
+ else
+ # ensure that $dest is not copied *into* $source
+ mkdir -p "$(dirname ${source})"
+ cp -a "${dest}" "${source}"
+ fi
+ fi
+
+ rofs_dest_backing=""
+ for d in ${rootmnt}/live/rofs/*
+ do
+ if [ -n "${rootmnt}" ]
+ then
+ rofs_dest_backing="${d}/$(echo ${dest} | sed -e "s|${rootmnt}||")"
+ else
+ rofs_dest_backing="${d}/${dest}"
+
+ fi
+ if [ -d "${rofs_dest_backing}" ]
+ then
+ break
+ else
+ rofs_dest_backing=""
+ fi
+ done
+
+ if [ -z "${PERSISTENT_READONLY}" ]
+ then
+ if [ -n "${opt_linkfiles}" ]
+ then
+ links_source="${source}"
+ links_dest="${dest}"
+ elif [ -n "${opt_union}" ]
+ then
+ do_union ${dest} ${source} ${rofs_dest_backing}
+ else
+ mount --bind "${source}" "${dest}"
+ fi
+ else
+ if [ -n "${opt_linkfiles}" ]
+ then
+ links_dest="${dest}"
+ dest="$(mktemp -d ${persistent_backing}/links_source-XXXXXX)"
+ links_source="${dest}"
+ fi
+ if [ -n "${rootmnt}" ]
+ then
+ cow_dir="$(echo ${dest} | sed -e "s|${rootmnt}|/cow/|")"
+ else
+ cow_dir="/live/cow/${dest}"
+ fi
+ mkdir -p ${cow_dir}
+ do_union ${dest} ${cow_dir} ${source} ${rofs_dest_backing}
+ fi
+
+ if [ -n "${opt_linkfiles}" ]
+ then
+ link_files "${links_source}" "${links_dest}" "${rootmnt}"
+ fi
+
+ PERSISTENCE_IS_ON="1"
+ export PERSISTENCE_IS_ON
+ done < ${custom_mounts}
+}
projects / live-boot-grml.git / blobdiff