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111 lines
2.2 KiB
111 lines
2.2 KiB
#!/sbin/sh
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#
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# Backup and restore addon /system files
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#
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export C=/tmp/backupdir
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export SYSDEV="$(readlink -nf "$2")"
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export SYSFS="$3"
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export V=18.0
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# Scripts in /system/addon.d expect to find backuptool.functions in /tmp
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cp -f /tmp/install/bin/backuptool.functions /tmp
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# Preserve /system/addon.d in /tmp/addon.d
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preserve_addon_d() {
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if [ -d $S/addon.d/ ]; then
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mkdir -p /tmp/addon.d/
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cp -a $S/addon.d/* /tmp/addon.d/
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chmod 755 /tmp/addon.d/*.sh
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fi
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}
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# Restore /system/addon.d from /tmp/addon.d
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restore_addon_d() {
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if [ -d /tmp/addon.d/ ]; then
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mkdir -p $S/addon.d/
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cp -a /tmp/addon.d/* $S/addon.d/
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rm -rf /tmp/addon.d/
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fi
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}
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# Proceed only if /system is the expected major and minor version
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check_prereq() {
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# If there is no build.prop file the partition is probably empty.
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if [ ! -r $S/build.prop ]; then
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echo "Backup/restore is not possible. Partition is probably empty"
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return 1
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fi
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if ! grep -q "^ro.lineage.version=$V.*" $S/build.prop; then
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echo "Backup/restore is not possible. Incompatible ROM version: $V"
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return 2
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fi
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return 0
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}
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# Execute /system/addon.d/*.sh scripts with $1 parameter
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run_stage() {
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if [ -d /tmp/addon.d/ ]; then
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for script in $(find /tmp/addon.d/ -name '*.sh' |sort -n); do
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$script $1
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done
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fi
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}
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determine_system_mount() {
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if grep -q -e"^$SYSDEV" /proc/mounts; then
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umount $(grep -e"^$SYSDEV" /proc/mounts | cut -d" " -f2)
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fi
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if [ -d /mnt/system ]; then
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SYSMOUNT="/mnt/system"
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elif [ -d /system_root ]; then
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SYSMOUNT="/system_root"
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else
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SYSMOUNT="/system"
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fi
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export S=$SYSMOUNT/system
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}
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mount_system() {
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mount -t $SYSFS $SYSDEV $SYSMOUNT -o rw,discard
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}
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unmount_system() {
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umount $SYSMOUNT
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}
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determine_system_mount
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case "$1" in
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backup)
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mount_system
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if check_prereq; then
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mkdir -p $C
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preserve_addon_d
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run_stage pre-backup
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run_stage backup
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run_stage post-backup
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fi
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unmount_system
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;;
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restore)
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mount_system
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if check_prereq; then
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run_stage pre-restore
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run_stage restore
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run_stage post-restore
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restore_addon_d
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rm -rf $C
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sync
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fi
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unmount_system
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;;
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*)
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echo "Usage: $0 {backup|restore}"
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exit 1
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esac
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exit 0
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