176 lines
4.3 KiB
Bash
Executable File
176 lines
4.3 KiB
Bash
Executable File
#!/bin/sh
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# vim: set sw=4 ts=4 sts=4 et :
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SUBVOLUMES='
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/var
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/var/log
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/var/tmp
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/etc
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'
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cleanup() {
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if [ -n "${tmpdir}" ] && [ "${tmpdir}" != / ]; then
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if mountpoint -q "${tmpdir}"; then
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umount "${tmpdir}"
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fi
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rm -rf "${tmpdir}"
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unset tmpdir
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fi
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}
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copy_var() {
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dev="$1"
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echo 'Copying /var contents to data volume'
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mount -o subvol=var "${dev}" "${tmpdir}" || exit
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cp -acuv /var/. "${tmpdir}" || exit
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umount "${tmpdir}"
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}
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format_dev() {
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dev="$1"
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partno=$(partition_number "${dev}")
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if [ -n "${partno}" ]; then
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disk="$(get_disk "${dev}")"
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if [ -n "${disk}" ]; then
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printf 'Resizing partition %d on disk %s\n' \
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"${partno}" \
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"${disk}" \
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>&2
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resize_partition "${disk}" "${partno}"
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else
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printf 'Could not find disk for device %s\n' \
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"${dev}" \
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>&2
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fi
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fi
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printf 'Creating BTRFS filesystem on %s\n' "${dev}"
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mkfs.btrfs "${dev}" || exit
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mount "${dev}" "${tmpdir}" || exit
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for vol in ${SUBVOLUMES}; do
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mkdir -p "${tmpdir}${vol%/*}" || exit
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btrfs subvolume create "${tmpdir}${vol}" || exit
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done
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relabel_all
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umount "${dev}" || exit
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}
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get_disk() {
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_syspath=/sys/class/block/${1##*/}
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[ -d "${_syspath}" ] || return 1
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if [ ! -f "${_syspath}"/partition ]; then
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readlink -f "${1}"
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return $?
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fi
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_disk=$(readlink -f "${_syspath}"/..)
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if [ -n "${_disk}" ]; then
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printf '/dev/%s\n' "${_disk##*/}"
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return 0
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fi
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return 1
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}
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has_fs() {
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dev="$1"
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fstype=$(blkid -o value -s TYPE "${dev}")
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[ -n "${fstype}" ]
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}
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last_partition() {
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cat /sys/class/block/"${1##*/}"/*/partition \
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| sort -n \
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| tail -n1
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}
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partition_number() {
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cat /sys/class/block/${1##*/}/partition
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}
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relabel_all() {
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selinuxtype=$(. /etc/selinux/config && echo ${SELINUXTYPE})
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find "${tmpdir}" | \
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setfiles \
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-v \
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-F \
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-m \
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-r "${tmpdir}" \
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-s \
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/etc/selinux/${selinuxtype}/contexts/files/file_contexts
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}
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resize_partition() {
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_disk="${1}"
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_part="${2}"
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_lastpart=$(last_partition "${_disk}")
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if [ "${_part}" -ne "${_lastpart}" ]; then
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printf 'Cannot resize %s, it is not the last partition on the disk\n' \
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"${_dev}" \
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>&2
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return 1
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fi
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_uuid=$(sfdisk --part-uuid "${_disk}" "${_part}") || return $?
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_type=$(sfdisk --part-type "${_disk}" "${_part}") || return $?
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_label=$(sfdisk --part-label "${_disk}" "${_part}") || return $?
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sfdisk --delete "${_disk}" "${_part}" || return $?
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printf 'type=%s, uuid=%s, name="%s"\n' \
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"${_type}" \
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"${_uuid}" \
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"${_label}" \
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| sfdisk -N "${_part}" "${_disk}" --force \
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|| return $?
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partx -u "${_disk}"
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}
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setup_etc() {
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dev="$1"
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echo 'Initializing writable paths in /etc'
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mount -o subvol=etc "${dev}" "${tmpdir}" || exit
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if [ ! -f "${tmpdir}"/shadow ]; then
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cp -ca /etc/shadow "${tmpdir}"/shadow || exit
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fi
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mount -o bind "${tmpdir}"/shadow /etc/shadow || exit
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if [ -f /etc/aimee-os/writable-etc ]; then
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while read type path; do
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if [ ! -e "${tmpdir}/${path}" ]; then
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if [ -e /etc/"${path}" ]; then
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cp -ca /etc/"${path}" "${tmpdir}/${path}"
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elif [ "${type}" = d ]; then
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mkdir -p "${tmpdir}/${path}"
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elif [ "${type}" = f ]; then
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: > "${tmpdir}/${path}"
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else
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printf 'Invalid path type %s for %s\n' \
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"${type}" \
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"${path}" \
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>&2
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continue
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fi
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fi
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mount -o bind "${tmpdir}/${path}" /etc/"${path}"
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done < /etc/aimee-os/writable-etc
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fi
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umount "${tmpdir}"
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}
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datapart=$(findfs $(awk '$2=="/var"{print $1}' /etc/fstab))
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if [ -b "${datapart}" ]; then
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printf 'Found data partition: %s\n' "${datapart}"
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else
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echo 'Could not identify data partition' >&2
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exit 1
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fi
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trap cleanup INT TERM QUIT EXIT
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tmpdir=/run/storinit
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mkdir -p "${tmpdir}"
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if ! has_fs "${datapart}"; then
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format_dev "${datapart}"
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fi
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setup_etc "${datapart}"
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copy_var "${datapart}"
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