snapshots="${root_snapshot_label} ${home_snapshot_label}"
fi
- overlay_devices=""
+ local root_snapdata=""
+ local home_snapshot_label=""
+ local root_overlay_label=""
+ local overlay_devices=""
for media in $(find_persistent_media "${overlays}" "${snapshots}" "${blacklistdev}" "${whitelistdev}")
do
media="$(echo ${media} | tr ":" " ")"
case ${media} in
${root_snapshot_label}=*)
- root_snapdata="${media#*=}"
+ if [ -z "${root_snapdata}" ]
+ then
+ root_snapdata="${media#*=}"
+ fi
;;
${home_snapshot_label}=*)
# This second type should be removed when snapshot will get smarter,
# hence when "/etc/live-snapshot*list" will be supported also by
# ext2|ext3|ext4|jffs2 snapshot types.
- home_snapdata="${media#*=}"
+ if [ -z "${home_snapdata}" ]
+ then
+ home_snapdata="${media#*=}"
+ fi
;;
${root_overlay_label}=*)
- device="${media#*=}"
- root_overlay_device="${device}"
+ if [ -z "${root_overlay_device}" ]
+ then
+ device="${media#*=}"
+ root_overlay_device="${device}"
+ fi
;;
${custom_overlay_label}=*)
device="${media#*=}"
mkdir -p "${rootmnt}/live"
mount -t tmpfs tmpfs ${rootmnt}/live
- # Adding other custom mounts
- if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
+ live_rofs_list=""
+ # SHOWMOUNTS is necessary for custom mounts with the union option
+ # Since we may want to do custom mounts in user-space it's best to always enable SHOWMOUNTS
+ if true #[ -n "${SHOWMOUNTS}" ] || ( [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ] 1)
then
- bindings="/bindings.list"
- links="/links.list"
- custom_mounts="/custom_mounts.list"
- rm -f ${bindings} ${links} ${custom_mounts} >/dev/null 2>&1
- persistent_backing="${rootmnt}/live/persistent"
-
- # First we scan all media and gather all information about custom mounts
- for device in ${overlay_devices}
+ # XXX: is the for loop really necessary? rofslist can only contain one item (see above XXX about EXPOSEDROOT) and this is also assumed elsewhere above (see use of $rofs above).
+ for d in ${rofslist}
do
- if [ ! -b "${device}" ]
- then
- continue
- fi
- device_name="$(basename ${device})"
- backing="${persistent_backing}/${device_name}"
- mkdir -p "${backing}"
- device_fstype="$(get_fstype ${device})"
- if [ -z "${PERSISTENT_READONLY}" ]
- then
- device_mount_opts="rw,noatime"
- else
- device_mount_opts="ro,noatime"
- fi
- device_used=""
- mount -t "${device_fstype}" -o "${device_mount_opts}" "${device}" "${backing}"
- 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")
+ live_rofs="${rootmnt}/live/rofs/${d##*/}"
+ live_rofs_list="${live_rofs_list} ${live_rofs}"
+ mkdir -p "${live_rofs}"
+ case d in
+ *.dir)
+ # do nothing # mount -o bind "${d}" "${live_rofs}"
+ ;;
+ *)
+ case "${UNIONTYPE}" in
+ unionfs-fuse)
+ mount -o bind "${d}" "${live_rofs}"
;;
*)
- log_warning_msg "Skipping custom mount with unkown option: ${opt}"
- continue 2
+ mount -o move "${d}" "${live_rofs}"
;;
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 $device, now we find /a/b, so we skip /a/b
-
- # ensure that no multiple-/ occur in paths
- full_source="$(echo ${backing}/${source}/ | sed -e 's|/\+|/|g')"
- 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
+ ;;
+ esac
done
+ fi
- # 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 -f ${bindings}
+ # Adding custom persistent
+ if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
+ then
+ local custom_mounts="/custom_mounts.list"
+ rm -rf ${custom_mounts} 2> /dev/null
- # After all mounts are considered we add symlinks so they
- # won't be hidden by some mount.
- [ -e "${links}" ] && sort -k2 -sbu ${links} >> ${custom_mounts}
- rm -f ${links}
+ # Gather information about custom mounts from devies detected as overlays
+ get_custom_mounts ${overlay_devices} ${custom_mounts} ${rootmnt}
- [ "${DEBUG}" = "Yes" ] && cp ${custom_mounts} ${persistent_backing}
+ [ "${DEBUG}" = "Yes" ] && cp ${custom_mounts} "${rootmnt}/live/persistent"
# Now we do the actual mounting (and symlinking)
- while read source dest options # < ${custom_mounts}
- do
- local opt_linkfiles=""
- for opt in $(echo ${options} | tr ',' ' ');
- do
- case "${opt}" in
- "linkfiles")
- opt_linkfiles="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
-
- # FIXME: could we instead only save the aufs-diff in the persistent media? implications? What about when there's changes in the live image?
-
- # 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
- fi
- # ensure that $dest is not copied *into* $source
- mkdir -p "$(dirname ${source})"
- cp -a "${dest}" "${source}"
- fi
-
- if [ -z "${PERSISTENT_READONLY}" ]
- then
- if [ -n "${opt_linkfiles}" ]
- then
- links_source="${source}"
- links_dest="${dest}"
- else
- mount --bind "${source}" "${dest}"
- fi
- else
- if [ -n "${opt_linkfiles}" ]
- then
- links_dest="${dest}"
- dest="$(mktemp -d ${persistent_backing}/links_source-XXXXXX)"
- links_source="${dest}"
- fi
- cow_dir="$(echo ${dest} | sed -e "s|${rootmnt}|/cow/|")"
- mkdir -p ${cow_dir}
- # XXX: broken! will be fixed in the next few commits...
- do_union ${dest} ${cow_dir} ${source}
- fi
-
- if [ -n "${opt_linkfiles}" ]
- then
- link_files "${links_source}" "${links_dest}" "${rootmnt}"
- fi
-
- PERSISTENCE_IS_ON="1"
- export PERSISTENCE_IS_ON
- done < ${custom_mounts}
- rm -f ${custom_mounts}
+ do_custom_mounts ${custom_mounts} ${rootmnt}
+ rm ${custom_mounts}
# Look for other snapshots to copy in
try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
try_snap "${home_snapdata}" "${rootmnt}" "HOME" "/home"
fi
- if [ -n "${SHOWMOUNTS}" ]
- then
- for d in ${rofslist}
- do
- mkdir -p "${rootmnt}/live/${d##*/}"
-
- case d in
- *.dir)
- # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
- ;;
-
- *)
- case "${UNIONTYPE}" in
- unionfs-fuse)
- mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
- ;;
-
- *)
- mount -o move "${d}" "${rootmnt}/live/${d##*/}"
- ;;
- esac
- ;;
- esac
- done
- fi
-
# shows cow fs on /cow for use by live-snapshot
mkdir -p "${rootmnt}/live/cow"
mount -o move /cow "${rootmnt}/live/cow" >/dev/null 2>&1 || mount -o bind /cow "${rootmnt}/live/cow" || log_warning_msg "Unable to move or bind /cow to ${rootmnt}/live/cow"
projects / live-boot-grml.git / blobdiff