SFTP shell for restricted usage

From http://www.derkeiler.com/Newsgroups/comp.security.ssh/2005-09/0096.html

On 2005-09-20, paul.mcgarry@gmail.com <paul.mcgarry@gmail.com> wrote:
> Richard E. Silverman wrote:
>> Sure, you can just wrap sftp-server in a script which first sets the
>> umask.
>
> Excellent, I just created an /opt/sftp-server.sh script:
>====
> #!/bin/bash
> umask 002
> /usr/lib/sftp-server

It probably won't matter much, but if you change the last line to
"exec /usr/lib/sftp-server" then you won't have an extra shell process
hanging around for the duration of the sftp-server process.