Ubuntu 12.04 - How do i lock a user account to only user sftp/scp and only to a certain directory?

Hello!

Due to some oddly specific requirements I need to lock a user account to web-server to only have the ability to upload content to a specific directory using sftp/scp and can't quite get it to work correctly...

Following some advice I found through googling I originally made an scp_shell by execing to /usr/bin/scp -t /some/directory/upload and putting that file in /etc/shells .

That worked well to restrict to scp only, but I could not modify it to allow sftp in a similar manner...

I played with rssh some and that made locking the commands down real easy... but did not seem to support a chroot option at all :(

i also tried to add this into the sshd_config:

Match user sftponly

 ChrootDirectory /home/%u X11Forwarding no AllowTcpForwarding no ForceCommand internal-sftp 

...but that apparently stopped ssh from restarting and almost locked me out, I think having something to do with the PAM auth maybe?

Any ideas would be helpful! Ideally adding the sftp command to custom shell would be nice, but I don't know how to do that.

Thanks in advance!