[Info-vax] DECnet Phase IV broken after VSI update

[Simon Clubley]

On 2021-10-30, Lawrence D?Oliveiro <lawrencedo99 at gmail.com> wrote:
> On Sunday, October 31, 2021 at 12:00:05 PM UTC+13, Craig A. Berry wrote:
>> I had to exclude the account that was doing that from the check, which 
>> is a pretty desperate hack. If there's a better way to identify 
>> sessions that are using FTDRIVER and have a TT device with a device 
>> class of 66 but are not actual interactive terminal sessions using SSH, 
>> I'd be happy to hear what it is.
>
> What is the need for FTDRIVER, exactly? Isn?t there some standard pseudo-terminal facility equivalent to pty(7) <https://manpages.debian.org/bullseye/manpages/pty.7.en.html>? On Linux, SSH service is implemented entirely in userland.

As already mentioned, it implements pseudoterminal support on VMS.

However, if you look at the man page you quote, you will see that the
actual pty devices are also created by a kernel mode device driver on
Linux, just as is done with FTDRIVER on VMS.

You will also see that there are even kernel parameters to control the
maximum number of pseudoterminals that exist at any one time on Linux.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.