[uml-devel] con0=pty '/dev/ttpy0: device or resource busy' bug?

[uml-devel] con0=pty '/dev/ttpy0: device or resource busy' bug?

[Struan Bartlett]

My thanks to everyone who's contributed to UML - it is a wonderfully useful
thing.

I need to run uml xterm-free and tty-free so 'm running uml with:

# linux con=pty

When I disconnect 'minicom' from /dev/ttyp0 and reconnect, minicom says:

# minicom
minicom: cannot open /dev/ttyp0: Device or resource busy

When I disconnect 'minicom' from /dev/ttyp1 or /dev/ttyp2 and reconnect, minicom connects just fine.

Is this a known bug?

Regards,

Struan Bartlett




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Re: [uml-devel] con0=pty '/dev/ttpy0: device or resource busy' bug?

[Michael Richardson]

-----BEGIN PGP SIGNED MESSAGE-----


>>>>> "Struan" == Struan Bartlett <struan@praguespringpeople.org> writes:
    Struan> My thanks to everyone who's contributed to UML - it is a
    Struan> wonderfully useful thing.

    Struan> I need to run uml xterm-free and tty-free so 'm running uml
    Struan> with:

    Struan> # linux con=pty

  I suggest you create a mortal account, and a that you run it under
screen.

  I use something like:

% cat start.sh

screen -ekk -r -dmS myuml ./linux stuff

% crontab -l
@reboot $HOME/start.sh

  and I have something like:

% cat .screenrc
multiuser on
adduser mcr

  that means that I can login to the system and run "screen -r -x myuml/"
to get the console. Note that this requires screen to be setuid root,
which it is not installed that way by default on many systems. This is
just a security precaution --- screen is designed to operate that way.

] Train travel features AC outlets with no take-off restrictions|  firewalls  [
]   Michael Richardson, Sandelman Software Works, Ottawa, ON    |net architect[
] mcr@sandelman.ottawa.on.ca http://www.sandelman.ottawa.on.ca/ |device driver[
] panic("Just another Debian/notebook using, kernel hacking, security guy");  [


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