Setting up ftp only users in non std directories
I want to setup on a Linux server (Centos 4.1) accounts for folk that will only be allowed ftp and not in the standard /home/username directory. I have an application that will produce files for users in their own home directories and a few sub directories. The directory that the application uses as a base is /var/ftp under which each user has there own directories, e.g. user with login name bibi would have /var/ftp/bibi. I don't want that user to be able to navigate (do 'cd ..' for example or 'ls ../' outside that directory or its sub direcotries.
I am not sure how to go about this, so advice on which man pages might need to be read and general approach are most welcome.