Re: Getty login for console is displayed inside xconsole in xdm (NetBSD/i386 7.0_RC1 drmkms)

[Adrian Christiansen <adrian.christiansen%gmail.com@localhost>]

I see, I had a look at my workstation running Linux and I don't know
why I thought it was showing the messages at tty00. But now I know a
lot more and I still got a way to retrieve console messages if X locks
up.

Thanks a lot for the patience and pointing me in the right direction :)


Cheers!,
Adrian.

2015-06-27 17:14 GMT+02:00 Eric Schnoebelen <eric%cirr.com@localhost>:
> Adrian Christiansen writes:
> - Aha, this is great news! I did as you said and enabled the ttyE0 in
> - /etc/ttys, I didn't disable console in /etc/ttys since I still want
> - the messages to show up on ttyE0.
>
> The entries in /etc/ttys control which devices have gettys
> running on them.  It does nothing to control where the kernel
> emits messages.
>
> -                                  This made me able to use ttyE0, and
> - login. As you pointed out already I do actually need to set console to
> - off in /etc/ttys to stop getty opening a login: promt in xconsole.
> - However this makes the messages only show up in xconsole, not on
> - ttyE0, this is not the behaviour I want, constty didn't work either.
> -
> - I guess I'm a bit confused about all of this. But I still would like
> - the messages sent to /dev/console to show up on ttyE0. Not just in the
> - xconsole. Is there a way to do this?
>
> No.  NetBSD (and traditional UNIX in general), has only *one*
> console device.  aka, one device where kernel messages are emitted.
>
> xconsole(1) uses ioctl to set the flag TIOCCONS, which,
> according to the tty(4) manual page:
>
>      TIOCCONS int *on
>                  If on points to a non-zero integer, redirect kernel
>                  console output (kernel printf's) to this terminal.
>                  If on points to a zero integer, redirect kernel
>                  console output back to the normal console.  This
>                  is usually used on workstations to redirect kernel
>                  messages to a particular window.
>
> Kernel messages can only go to one terminal.  (and /dev/klog,
> which syslogd(8) uses to pick them up.) xconsole says the pty it
> has opened is that terminal.
>
> - 2015-06-26 23:28 GMT+02:00 Eric Schnoebelen <eric%cirr.com@localhost>:
> - > Adrian Christiansen writes:
> - > - This makes me wonder if it is an issue with drmkms at all. So I'm
> - > - thinking more that this is an issue with xdm or xconsole being setup
> - > - wrong?, haven't changed any settings since installing.
> - >
> - > xconsole(1) is functioning as designed.  It acquires the console
> - > messages by telling the kernel that the pty it has opened is the
> - > console.
> - >
> - > Thus, getting attempts to run on it.
>
> "gettings"? My fingers must be overriding my brain while typing.  :D
> I meant "gettys".
>
> - > If you wish to have xconsole(1) capture the console messages,
> - > but have getting running on the F1 tty, edit /etc/ttys to
> - > disable the getty running on console, and enable the one on
> - > ttyE0.
>
> --
> Eric Schnoebelen                eric%cirr.com@localhost           http://www.cirr.com
>   "Love means giving selflessly, excluding none and including all."  -- Rama