Prevent specific keyboard inputs

[devon]

I am using Enterprise Desktop Linux.

When a user logs into the system via NoMachine, I don’t want the user to be able to access the super keys / Windows key.

I have tried to use both the hooks in the node.cfg

UserScriptAfterSessionStart “/usr/bin/user-restriction.sh”

UserScriptBeforeSessionStart “/usr/bin/user-restriction.sh”

to execute a xmodmap command to bind the super key to nothing.

For example:

#!/bin/bash

xmodmap -e “keycode 133=”

will result in the following output :

xmodmap:  unable to open display ‘:1002’

xmodmap -e ‘keycode 133=’

Is this the correct approach to changing keymappings with NoMachine?

Or

Is there config that can be manipulated to change the mappings ?

Thank you

[Gega]

Hello devon,

xmodmap command needs X authorization to work properly, therefore it’s necessary to set correct path for x authority cookie. Here’s an example how to correctly set environment variables and run xmodmap:

#!/bin/bash

export DISPLAY=":$4"

export XAUTHORITY="$NX_SYSTEM/var/log/node/C-$(hostname)-$4-$1/authority"

xmodmap -e "keycode 133="

This script needs to be run on UserScriptAfterSessionStart event.

• This reply was modified 6 years, 7 months ago by Britgirl.
• This reply was modified 6 years, 7 months ago by Gega.
• This reply was modified 6 years, 7 months ago by Gega.

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