setting up max ptys under 5.x

[Joshua Oreman]

On Fri, Jun 27, 2003 at 12:29:41PM -0700 or thereabouts, Josh Brooks wrote:
> 
> 
> On Fri, 27 Jun 2003, Joshua Oreman wrote:
> 
> > > maxusers to 512 ... any new toggles I should know of to be able to use max
> > > ptys on the system, or can I just follow whatever directions I hope to
> > > receive regarding creating the devices ?
> >
> > 5.x creates the devices automatically. So if you have 256 users, you'll have 256
> > ptys. If you have 0 users, you'll have 0 ptys. maxusers has no effect, setting
> > it to 512 does seem a bit high...
> 
> Thank you - that is nice to know.  I have a related question - does this
> apply inside of jails as well ?  I remember some testing on 4.x I was
> doing with 16 jails, and even though I had 256 pty /dev nodes, if the /dev
> inside the jail only had 32 of them (the default) then the jail users
> would start getting denied logins and running out of ptys generally.
> 
> This happened even tho the underlying fbsd system had all 256 ptys - the
> only way to solve it was to create all 256 ptys in the /dev of _the jail_
> as well.
> 
> How will this work in 5.x - will it be automatic for everyone, or should I
> perhaps mount a devfs for each jail ?/?

Devfs manages the ptys, so you will have to mount a devfs in the jail.
I would suggest using devd to prevent the more "sensitive" devices from
going in. Or just rm them.

-- Josh

> 
> thnks!