diff options
Diffstat (limited to 'scripts/boot/snapshot.sh')
| -rwxr-xr-x | scripts/boot/snapshot.sh | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/scripts/boot/snapshot.sh b/scripts/boot/snapshot.sh deleted file mode 100755 index 568fda7..0000000 --- a/scripts/boot/snapshot.sh +++ /dev/null @@ -1,173 +0,0 @@ -#!/bin/sh - -#set -e - -do_snap_copy () -{ - fromdev="${1}" - todir="${2}" - snap_type="${3}" - size=$(fs_size "${fromdev}" "" "used") - - if [ -b "${fromdev}" ] - then - log_success_msg "Copying snapshot ${fromdev} to ${todir}..." - - # look for free mem - if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ] - then - todev=$(awk -v pat="$(base_path ${todir})" '$2 == pat { print $1 }' /proc/mounts) - freespace=$(df -k | awk '/'${todev}'/{print $4}') - else - freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo) - fi - - tomount="/mnt/tmpsnap" - - if [ ! -d "${tomount}" ] - then - mkdir -p "${tomount}" - fi - - fstype=$(get_fstype "${fromdev}") - - if [ -n "${fstype}" ] - then - # Copying stuff... - mount -o ro -t "${fstype}" "${fromdev}" "${tomount}" || log_warning_msg "Error in mount -t ${fstype} -o ro ${fromdev} ${tomount}" - cp -a "${tomount}"/* ${todir} - umount "${tomount}" - else - log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}" - fi - - rmdir "${tomount}" - - if echo ${fromdev} | grep -qs loop - then - losetup -d "${fromdev}" - fi - - return 0 - else - log_warning_msg "Unable to find the snapshot ${snap_type} medium" - return 1 - fi -} - -try_snap () -{ - # copy the contents of previously found snapshot to ${snap_mount} - # and remember the device and filename for resync on exit in live-boot.init - - snapdata="${1}" - snap_mount="${2}" - snap_type="${3}" - snap_relpath="${4}" - - if [ -z "${snap_relpath}" ] - then - # root snapshot, default usage - snap_relpath="/" - else - # relative snapshot (actually used just for "/home" snapshots) - snap_mount="${2}${snap_relpath}" - fi - - if [ -n "${snapdata}" ] && [ ! -b "${snapdata}" ] - then - log_success_msg "found snapshot: ${snapdata}" - snapdev="$(echo ${snapdata} | cut -f1 -d ' ')" - snapback="$(echo ${snapdata} | cut -f2 -d ' ')" - snapfile="$(echo ${snapdata} | cut -f3 -d ' ')" - - if ! try_mount "${snapdev}" "${snapback}" "ro" - then - break - fi - - RES="0" - - if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|ext4\|jffs2\)' - then - # squashfs, jffs2 or ext2/ext3/ext4 snapshot - dev=$(get_backing_device "${snapback}/${snapfile}") - - do_snap_copy "${dev}" "${snap_mount}" "${snap_type}" - RES="$?" - else - # cpio.gz snapshot - - # Unfortunately klibc's cpio is incompatible with the - # rest of the world; everything else requires -u -d, - # while klibc doesn't implement them. Try to detect - # whether it's in use. - cpiopath="$(which cpio)" || true - if [ "$cpiopath" ] && grep -aq /lib/klibc "$cpiopath" - then - cpioargs= - else - cpioargs='--unconditional --make-directories' - fi - - if [ -s "${snapback}/${snapfile}" ] - then - BEFOREDIR="$(pwd)" - cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse 2>/dev/null - RES="$?" - cd "${BEFOREDIR}" - else - log_warning_msg "${snapback}/${snapfile} is empty, adding it for sync on reboot." - RES="0" - fi - - if [ "${RES}" != "0" ] - then - log_warning_msg "failure to \"zcat ${snapback}/${snapfile} | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse\"" - fi - fi - - umount "${snapback}" || log_warning_msg "failure to \"umount ${snapback}\"" - - if [ "${RES}" != "0" ] - then - log_warning_msg "Impossible to include the ${snapfile} Snapshot file" - fi - - elif [ -b "${snapdata}" ] - then - # Try to find if it could be a snapshot partition - dev="${snapdata}" - log_success_msg "found snapshot ${snap_type} device on ${dev}" - if echo "${dev}" | grep -qs loop - then - # strange things happens, user confused? - snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' ) - snapfile=$(basename ${snaploop}) - snapdev=$(awk -v pat="$( dirname ${snaploop})" '$2 == pat { print $1 }' /proc/mounts) - else - snapdev="${dev}" - fi - - if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}" - then - log_warning_msg "Impossible to include the ${snap_type} Snapshot (i)" - return 1 - else - if [ -n "${snapfile}" ] - then - # it was a loop device, user confused - umount ${snapdev} - fi - fi - else - log_warning_msg "Impossible to include the ${snap_type} Snapshot (o)" - return 1 - fi - - if [ -z ${PERSISTENCE_READONLY} ] - then - echo "export ${snap_type}SNAP=${snap_relpath}:${snapdev}:${snapfile}" >> snapshot.conf # for resync on reboot/halt - fi - return 0 -} |