grep -m1 "^[^ ]\+ ${dir} " /proc/mounts | cut -d' ' -f1
}
+chown_ref ()
+{
+ local reference="${1}"
+ shift
+ local targets=${@}
+ local owner=$(stat -c %u:%g "${reference}")
+ chown -h ${owner} ${targets}
+}
+
+chmod_ref ()
+{
+ local reference="${1}"
+ shift
+ local targets=${@}
+ local rights=$(stat -c %a "${reference}")
+ chmod ${rights} ${targets}
+}
+
lastline ()
{
while read lines
# live-boot normally does (into $rootmnt)).
# remove multiple /:s and ensure ending on /
- local src_dir="$(echo "${1}"/ | sed -e 's|/\+|/|g')"
- local dest_dir="$(echo "${2}"/ | sed -e 's|/\+|/|g')"
+ local src_dir="$(trim_path ${1})/"
+ local dest_dir="$(trim_path ${2})/"
local src_mask="${3}"
# This check can only trigger on the inital, non-recursive call since
if [ ! -d "${dest}" ]
then
mkdir -p "${dest}"
- prev="$(dirname "${dest}")"
- chown --reference "${prev}" "${dest}"
- chmod --reference "${prev}" "${dest}"
+ chown_ref "${src}" "${dest}"
+ chmod_ref "${src}" "${dest}"
fi
link_files "${src}" "${dest}" "${src_mask}"
else
+ local final_src=${src}
if [ -n "${src_mask}" ]
then
- src="$(echo ${src} | sed "s|^${src_mask}||")"
+ final_src="$(echo ${final_src} | sed "s|^${src_mask}||")"
fi
rm -rf "${dest}" 2> /dev/null
- ln -s "${src}" "${dest}"
+ ln -s "${final_src}" "${dest}"
+ chown_ref "${src}" "${dest}"
fi
done
}
linkfiles)
opt_linkfiles="yes"
;;
- union)
+ union|bind)
;;
*)
log_warning_msg "Skipping custom mount with unkown option: ${opt}"
while read device source dest options # < ${custom_mounts}
do
+ local opt_bind="yes"
local opt_linkfiles=""
local opt_union=""
for opt in $(echo ${options} | tr ',' ' ');
do
case "${opt}" in
+ bind)
+ opt_bind="yes"
+ unset opt_linkfiles opt_union
+ ;;
linkfiles)
opt_linkfiles="yes"
+ unset opt_bind opt_union
;;
union)
opt_union="yes"
+ unset opt_bind opt_linkfiles
;;
esac
done
- if [ -n "${opt_linkfiles}" ] && [ -n "${opt_union}" ]
- then
- log_warning_msg "Skipping custom mount ${dest} with options ${options}: \"linkfiles\" and \"union\" are mutually exclusive options"
- fi
-
if [ -n "$(what_is_mounted_on "${dest}")" ]
then
log_warning_msg "Skipping custom mount ${dest}: $(what_is_mounted_on "${dest}") is already mounted there"
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 trim_path ${dest} | grep -qe "^${rootmnt}/*home/[^/]\+"
- then
- path="/"
- for dir in $(echo ${dest} | sed -e 's|/\+| |g')
- do
- path=${path}/${dir}
- if [ ! -e ${path} ]
+ # create the destination and delete existing files in
+ # its path that are in the way
+ path="/"
+ for dir in $(echo ${dest} | sed -e 's|/\+| |g')
+ do
+ path=$(trim_path ${path}/${dir})
+ if [ -f ${path} ]
+ then
+ rm -f ${path}
+ fi
+ if [ ! -e ${path} ]
+ then
+ mkdir -p ${path}
+ if echo ${path} | grep -qe "^${rootmnt}/*home/[^/]\+"
then
- mkdir -p ${path}
- # assume that the intended user is the first, which is usually the case
+ # if ${dest} is in /home try fixing proper ownership by assuming that the intended user is the first, which is usually the case
+ # FIXME: this should really be handled by live-config since we don't know for sure which uid a certain user has until then
chown 1000:1000 ${path}
fi
- done
- else
- mkdir -p ${dest}
- fi
+ fi
+ done
fi
# if ${source} doesn't exist on our persistent media
then
# unions and don't need to be bootstrapped
# linkfiles dirs can't be bootstrapped in a sensible way
- mkdir "${source}"
- chown --reference "${dest}" "${source}"
- chmod --reference "${dest}" "${source}"
- else
+ mkdir -p "${source}"
+ chown_ref "${dest}" "${source}"
+ chmod_ref "${dest}" "${source}"
+ elif [ -n "${opt_bind}" ]
+ then
# ensure that $dest is not copied *into* $source
mkdir -p "$(dirname ${source})"
cp -a "${dest}" "${source}"
# XXX: If CONFIG_AUFS_ROBR is added to the Debian kernel we can
# ignore the loop below and set rofs_dest_backing=$dest
- 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 "${rofs_dest_backing}" ]
- then
- break
- else
- rofs_dest_backing=""
- fi
- done
+ local rofs_dest_backing=""
+ if [ -n "${opt_linkfiles}"]
+ then
+ 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 "${rofs_dest_backing}" ]
+ then
+ break
+ else
+ rofs_dest_backing=""
+ fi
+ done
+ fi
- if [ -z "${PERSISTENT_READONLY}" ]
+ if [ -n "${opt_linkfiles}" ] && [ -z "${PERSISTENT_READONLY}" ]
then
- if [ -n "${opt_linkfiles}" ]
- then
- links_source="${source}"
- links_dest="${dest}"
- elif [ -n "${opt_union}" ]
+ link_files ${source} ${dest} ${rootmnt}
+ elif [ -n "${opt_linkfiles}" ] && [ -n "${PERSISTENT_READONLY}" ]
+ then
+ mkdir -p ${rootmnt}/live/persistent
+ local links_source=$(mktemp -d ${rootmnt}/live/persistent/links-source-XXXXXX)
+ chown_ref ${source} ${links_source}
+ chmod_ref ${source} ${links_source}
+ # We put the cow dir in the below strange place to
+ # make it absolutely certain that the link source
+ # has its own directory and isn't nested with some
+ # other custom mount (if so that mount's files would
+ # be linked, causing breakage.
+ if [ -n "${rootmnt}" ]
then
- do_union ${dest} ${source} ${rofs_dest_backing}
+ local cow_dir="/cow/live/persistent/$(basename ${links_source})"
else
- mount --bind "${source}" "${dest}"
- fi
- else
- if [ -n "${opt_linkfiles}" ]
- then
- links_dest="${dest}"
- dest="$(mktemp -d ${persistent_backing}/links_source-XXXXXX)"
- links_source="${dest}"
+ # This is happens if persistence is activated
+ # post boot
+ local cow_dir="/live/cow/live/persistent/$(basename ${links_source})"
fi
+ mkdir -p ${cow_dir}
+ chown_ref "${source}" "${cow_dir}"
+ chmod_ref "${source}" "${cow_dir}"
+ do_union ${links_source} ${cow_dir} ${source} ${rofs_dest_backing}
+ link_files ${links_source} ${dest} ${rootmnt}
+ elif [ -n "${opt_union}" ] && [ -z "${PERSISTENT_READONLY}" ]
+ then
+ do_union ${dest} ${source} ${rofs_dest_backing}
+ elif [ -n "${opt_bind}" ] && [ -z "${PERSISTENT_READONLY}" ]
+ then
+ mount --bind "${source}" "${dest}"
+ elif [ -n "${opt_bind}" -o -n "${opt_union}" ] && [ -n "${PERSISTENT_READONLY}" ]
+ then
+ # bind-mount and union mount are handled the same
+ # in read-only mode, but note that rofs_dest_backing
+ # is non-empty (and necessary) only for unions
if [ -n "${rootmnt}" ]
then
- cow_dir="$(echo ${dest} | sed -e "s|${rootmnt}|/cow/|")"
+ local cow_dir="$(echo ${dest} | sed -e "s|^${rootmnt}|/cow/|")"
else
- cow_dir="/live/cow/${dest}"
+ # This is happens if persistence is activated
+ # post boot
+ local cow_dir="/live/cow/${dest}"
fi
- if [ -e "${cow_dir}" ]
+ if [ -e "${cow_dir}" ] && [ -z "${opt_linkfiles}" ]
then
# If an earlier custom mount has files here
# it will "block" the current mount's files
rm -rf "${cow_dir}"
fi
mkdir -p ${cow_dir}
- chown --reference "${source}" "${cow_dir}"
- chmod --reference "${source}" "${cow_dir}"
+ chown_ref "${source}" "${cow_dir}"
+ chmod_ref "${source}" "${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
projects / live-boot-grml.git / blobdiff