umask for internal-sftp users ?



Hello,

Running Debian 5.
SSH version 5.1p1-5.

How do I set umask for sftp only users ?

Users are jailed - that means they use internal-sftp:
# cat /etc/ssh/sshd_config
..........
Match group group1
ChrootDirectory /home/%u
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp
..........


thanks
Vilius