per-directory permission in svn

I am configuring svn server for a local network. This is file based svn server i'e the host is localhost. I would like to give per-directory permission to my users.The repository is in my account. Is it possible to do on this setup?

  svn list file://localhost/path /to repository/in /network 

It lists the svn repository and as 开发者_JAVA百科well as checkouts without authenticating the users. I have configured both the passwd and authz file of con directory.Following is the configuration:

     [general]
     anon-access = none
     auth-access = write
     password-db = passwd
     authz-db = authz
     realm    = abc

SASL is disabled.I have added username and password in the passwd file and I have given per-directory permission in authz file. But this is not working at all. It neither does asks username nor authentcates it. Can you please suggest any ideas for it?

And I have a

Use

[users]
username = password

in order to limit access to authenticate users only.