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Saving TTY settings

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Operating Systems Linux Red Hat Saving TTY settings
# 1  
Old 04-17-2014
Saving TTY settings
I have 4 digi etherlite boards that allow Wyse and VT100 terminals to connect to our network (stop laughing) Smilie

We are switching from an older version of redhat where we have these running to: Red Hat Enterprise Linux Server release 6.5 (Santiago)

I finally got them working and copied the tty settings from the old machine to a file and then loaded them in to the new machine:

Saved via:
Code:
 stty --save /dev/ttya00 $i > /home/shared/IT/tty/ttya0

Then loaded on new machine with

Code:
 stty -F /dev/ttya0 `cat /home/shared/IT/tty/ttya0`

and this works fine.

The problem is that on the old machine I turned everything on via inittab (example below)

Code:
a0:2345:respawn:/sbin/agetty  19200 ttya00
a1:2345:respawn:/sbin/agetty  19200 ttya01
a2:2345:respawn:/sbin/agetty  19200 ttya02

I have no idea how to do this under the new version.

Like I said I have it working but it's not right

in my /etc/rc.d/rc.local i have things like this:

Code:
start tty TTY=/dev/ttya00
start tty TTY=/dev/ttya01
start tty TTY=/dev/ttya02
start tty TTY=/dev/ttya03
start tty TTY=/dev/ttya04
start tty TTY=/dev/ttya05

stty -F /dev/ttya0 `cat /home/shared/IT/tty/ttya0`
stty -F /dev/ttya1 `cat /home/shared/IT/tty/ttya1`
stty -F /dev/ttya2 `cat /home/shared/IT/tty/ttya2`
stty -F /dev/ttya3 `cat /home/shared/IT/tty/ttya3`
stty -F /dev/ttya4 `cat /home/shared/IT/tty/ttya4`

So my question is:

a) how do i save my settings so i don't have to load them each time?
b) how do i do something similiar to inittab to specify which tty's I want agetty/mgetty running on?

Thanks!
Last edited by bartus11; 04-17-2014 at 02:57 PM.. Reason: Please use [code][/code] tags.
# 2  
Old 04-17-2014
Why not specify the options you actually want, instead of loading from save all the time?
# 3  
Old 04-17-2014
Corona

I just want to be able to reboot and not have to reload them again.

and also not have to use "start tty" on each port (16 ports * 4 terminal servers)
# 4  
Old 04-17-2014
Quote:
Originally Posted by mp99
Corona

I just want to be able to reboot and not have to reload them again.
They have to come from somewhere. /etc/inittab is a decent place for them if you know the options you want.

stty appears to understand them if you just give it as arguments:

Code:
$ stty save
500:5:bf:8a3b:3:1c:7f:15:4:0:1:0:11:13:1a:0:12:f:17:16:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0

$ stty 500:5:bf:8a3b:3:1c:7f:15:4:0:1:0:11:13:1a:0:12:f:17:16:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0:0
$

# 5  
Old 04-17-2014
you can't put them inittab under RedHat EL 6.5, as I understand

it says:

# inittab is only used by upstart for the default runlevel.
#
# ADDING OTHER CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.
#
# 6  
Old 04-17-2014
yeah this seems to be an Upstart issue, which I'm not totally familiar with, but i booted into a CentOS VM and poked around /etc/init.

It seems start-ttys.conf works by iterating over ACTIVE_CONSOLES and starting new jobs like you do (start tty TTY=...). So I'd probably add to ACTIVE_CONSOLES (ACTIVE_CONSOLES=/dev/tty[1-6] /dev/ttya0[0-5]), and create a tty.override which does something like:

Code:
# load saved tty config if one exists
pre-start script
  [ -f "/home/shared/IT/tty/$TTY" ] && stty -F "/dev/$TTY" < "/home/shared/IT/tty/$TTY"
end script

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