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#!/bin/bash -e
validate_path() {
# validate path
targetpath=$(realpath -m -- "$1")
if [[ "$targetpath" != /.snapshots/* ]]; then
echo "Invalid path given." >&2
exit 2
fi
}
case "$1" in
snapshot)
validate_path "$2"
touch /home
btrfs subvolume snapshot -r -- /home "$2"
;;
delete_snapshot)
validate_path "$2"
btrfs subvolume delete -- "$2"
;;
mount)
validate_path "$2"
mkdir -p /backup
mount --bind -- "$2" /backup
;;
cleanup)
umount /backup 2> /dev/null || true
rm -rf /backup
;;
*)
echo "No command specified." >&2
exit 1
;;
esac
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