svn commit: r262957 - in head/etc: etc.arm etc.ia64 etc.mips etc.powerpc etc.sparc64

[Nathan Whitehorn]

On 03/09/14 14:06, Marcel Moolenaar wrote:
> Author: marcel
> Date: Sun Mar  9 21:06:22 2014
> New Revision: 262957
> URL: http://svnweb.freebsd.org/changeset/base/262957
>
> Log:
>    Change the terminal type/class for enabled serial lines to 3wire. This
>    allows us to change the uart(4) driver to not hardcode specific line
>    settings for the serial console.
>    
>    A terminal type of 3wire makes sure the console still works when no DCD
>    signal is present, which preserves behviour. When it is known that the
>    terminal server (or DCE in general) provides DCD, a terminal type/class
>    of std can be used. This has the effect of being logged out when one
>    disconnects from the console -- improving security overall.
>    
>    Likewise, when uart(4) does not fixate the baudrate, one can change
>    the terminal type/class to set a specific baudrate. An operator can use
>    this to change the console speed mid-flight, without needing a reboot.
>    Of course it helps in this respect if and when the firmware can be
>    configured from the OS.
>    
>    The above mentioned capabilities depend on uart(4) being changed, which
>    is to happen next.
>

Should we set onifconsole for x86 UARTs as well? That enables them if 
they are the kernel console and is probably a user friendliness improvement.
-Nathan