Standard key/value datastore for unix

I know about the **key/value** libraries for unix (**berkeleydb**, **gdbm**, **redis**... ). But before I start coding, I wonder if there is a standard tool for unix that would allow me to perform the following operations: $ tool -f datastore.db put "KEY" "VALUE" $ tool -f datastore.db put -f file_key_values.txt $ tool -f datastore.db get "KEY" $ tool -f datastore.db get -f file_keys.txt $ tool -f datastore.db remove "KEY" $ etc... Thanks