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@ -219,6 +219,11 @@ is_nfs() {
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return 1
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}
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is_aufs() {
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[ "${USE_AUFS}" = "1" ] && return 0
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return 1
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}
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setup_real_root() {
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if ! is_livecd
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then
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@ -1611,6 +1616,227 @@ livecd_init() {
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fi
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}
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livecd_mount() {
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# Let Init scripts know that we booted from CD
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export CDBOOT
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CDBOOT=1
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good_msg 'Determining looptype ...'
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cd "${NEW_ROOT}"
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# Find loop and looptype
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[ -z "${LOOP}" ] && find_loop
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[ -z "${LOOPTYPE}" ] && find_looptype
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cache_cd_contents
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# If encrypted, find key and mount, otherwise mount as usual
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if [ -n "${CRYPT_ROOT}" ]
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then
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CRYPT_ROOT_KEY="$(head -n 1 "${CDROOT_PATH}"/${CDROOT_MARKER})"
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CRYPT_ROOT='/dev/loop0'
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good_msg 'You booted an encrypted livecd' "${CRYPT_SILENT}"
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losetup /dev/loop0 "${CDROOT_PATH}/${LOOPEXT}${LOOP}"
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test_success 'Preparing loop filesystem'
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start_luks
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case ${LOOPTYPE} in
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normal)
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MOUNTTYPE="ext2"
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;;
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*)
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MOUNTTYPE="${LOOPTYPE}"
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;;
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esac
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mount -t "${MOUNTTYPE}" -o ro /dev/mapper/root \
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"${NEW_ROOT}/mnt/livecd"
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test_success 'Mount filesystem'
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FS_LOCATION='mnt/livecd'
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else
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# Setup the loopback mounts, if unencrypted
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if [ "${LOOPTYPE}" = 'normal' ]; then
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_livecd_mount_normal
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FS_LOCATION='mnt/livecd'
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elif [ "${LOOPTYPE}" = 'squashfs' ]; then
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_livecd_mount_squashfs
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FS_LOCATION='mnt/livecd'
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elif [ "${LOOPTYPE}" = 'gcloop' ]; then
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_livecd_mount_gcloop
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FS_LOCATION='mnt/livecd'
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elif [ "${LOOPTYPE}" = 'zisofs' ]; then
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FS_LOCATION="${CDROOT_PATH/\/}/${LOOPEXT}${LOOP}"
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elif [ "${LOOPTYPE}" = 'noloop' ]; then
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FS_LOCATION="${CDROOT_PATH/\/}"
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elif [ "${LOOPTYPE}" = 'sgimips' ]; then
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_livecd_mount_sgimips
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FS_LOCATION='mnt/livecd'
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fi
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fi
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is_nfs && _livecd_mount_unpack_nfs
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# Manually copy livecd content to tmpfs if aufs is disabled
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is_aufs || _livecd_mount_copy_content
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}
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# Unpack additional packages from NFS mount
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# This is useful for adding kernel modules to /lib
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# We do this now, so that additional packages can add whereever
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# they want.
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_livecd_mount_unpack_nfs() {
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if [ -e "${CDROOT_PATH}/add" ]; then
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for targz in $(ls ${CDROOT_PATH}/add/*.tar.gz); do
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tarname=$(basename ${targz})
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good_msg "Adding additional package ${tarname}"
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(cd ${NEW_ROOT} ; /bin/tar -xzf ${targz})
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done
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fi
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}
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_livecd_mount_sgimips() {
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# getdvhoff finds the starting offset (in bytes) of the squashfs
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# partition on the cdrom and returns this offset for losetup
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#
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# All currently supported SGI Systems use SCSI CD-ROMs, so
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# so we know that the CD-ROM is usually going to be /dev/sr0.
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#
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# We use the value given to losetup to set /dev/loop0 to point
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# to the liveCD root partition, and then mount /dev/loop0 as
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# the LiveCD rootfs
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good_msg 'Locating the SGI LiveCD Root Partition'
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echo ' ' | \
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losetup -o $(getdvhoff "${NEW_ROOT}${REAL_ROOT}" 0) \
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"${NEW_ROOT}${CDROOT_DEV}" \
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"${NEW_ROOT}${REAL_ROOT}"
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test_success 'losetup /dev/sr0 /dev/loop0'
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good_msg 'Mounting the Root Partition'
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mount -t squashfs -o ro "${NEW_ROOT}${CDROOT_DEV}" \
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"${NEW_ROOT}/mnt/livecd"
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test_success 'mount /dev/loop0 /'
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}
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_livecd_mount_gcloop() {
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good_msg 'Mounting gcloop filesystem'
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echo ' ' | losetup -E 19 -e ucl-0 -p0 \
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"${NEW_ROOT}/dev/loop0" \
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"${CDROOT_PATH}/${LOOPEXT}${LOOP}"
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test_success 'losetup the loop device'
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mount -t ext2 -o ro "${NEW_ROOT}/dev/loop0" "${NEW_ROOT}/mnt/livecd"
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test_success 'Mount the losetup loop device'
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}
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_livecd_mount_normal() {
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good_msg 'Mounting loop filesystem'
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mount -t ext2 -o loop,ro \
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"${CDROOT_PATH}/${LOOPEXT}${LOOP}" \
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"${NEW_ROOT}/mnt/livecd"
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test_success 'Mount filesystem'
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}
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_livecd_mount_squashfs() {
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# if AUFS, redirect to the squashfs+aufs setup function
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if is_aufs; then
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good_msg 'Mounting squashfs & aufs filesystems'
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setup_squashfs_aufs
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test_success 'Mount filesystem'
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return # preserve old behaviour
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fi
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good_msg 'Mounting squashfs filesystem'
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local cached_squashfs_path="${NEW_ROOT}/mnt/${LOOP}"
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local squashfs_path="${CDROOT_PATH}/${LOOPEXT}${LOOP}"
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# Upgrade to cached version if possible
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if [ -n "${DO_cache}" ] && [ -f "${cached_squashfs_path}" ]; then
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squashfs_path="${cached_squashfs_path}"
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fi
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mount -t squashfs -o loop,ro "${squashfs_path}" \
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"${NEW_ROOT}/mnt/livecd" || {
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bad_msg "squashfs filesystem could not be mounted."
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do_rundebugshell
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}
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}
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# Manually copy livecd read-only content into the final livecd root
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# filesystem directory, which has been mounted as tmpfs.
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_livecd_mount_copy_content() {
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local fs_loc="${NEW_ROOT}/${FS_LOCATION}"
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good_msg "Copying read-write image contents to tmpfs"
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# Copy over stuff that should be writable
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(
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cd "${fs_loc}" && cp -a ${ROOT_TREES} "${NEW_ROOT}"
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) || {
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bad_msg "Copy failed, dropping into a shell."
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do_rundebugshell
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}
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# Now we do the links.
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for x in ${ROOT_LINKS}; do
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if [ -L "${fs_loc}/${x}" ]; then
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ln -s "$(readlink ${fs_loc}/${x})" "${x}" 2>/dev/null
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continue
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fi
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# List all subdirectories of x
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find "${fs_loc}/${x}" -type d 2>/dev/null | \
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while read directory; do
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# Strip the prefix of the FS_LOCATION
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directory="${directory#${fs_loc}/}"
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# Skip this directory if we already linked a parent
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# directory
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if [ "${current_parent}" != "" ]; then
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var=$(echo "${directory}" | \
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grep "^${current_parent}")
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if [ "${var}" != "" ]; then
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continue
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fi
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fi
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local root_d="${NEW_ROOT}/${directory}"
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local fsloc_d="${FS_LOCATION}/${directory}"
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# Test if the directory exists already
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if [ ! -e "/${root_d}" ]; then
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# It does not exist, make a link to the livecd
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ln -s "/${FS_LOCATION}/${directory}" \
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"${directory}" 2>/dev/null
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current_parent="${directory}"
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continue
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fi
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# It does exist, link all the individual files
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local fs_d="/${fs_loc}/${directory}"
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for file in $(ls "${fs_d}"); do
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[ -d "${fs_d}/${file}" ] && continue
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[ -e "${root_d}/${file}" ] && continue
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ln -s "/${fsloc_d}/${file}" \
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"${directory}/${file}" 2> /dev/null
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done
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done
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done
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mkdir initramfs proc tmp sys run 2>/dev/null
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chmod 1777 tmp
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# have handy /mnt/cdrom (CDROOT_PATH) as well
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_new_cdroot="${NEW_ROOT}${CDROOT_PATH}"
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[ ! -d "${_new_cdroot}" ] && mkdir -p "${_new_cdroot}"
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mount --bind "${CDROOT_PATH}" "${_new_cdroot}"
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}
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get_mounts_list() {
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awk '
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/^[[:blank:]]*#/ { next }
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Fabio Erculiani
12 years ago