I do a lot of shell scripting in linux (running xmonad window manager, so I can use xmodmap or xinput, but not GNOME or KDE control panels), and it would be super useful for a shift-space keystroke to output an underscore ("_") character. Any ideas how to do this?
What i have:
- Linux machine (debian stable) without monitor, keyboard, no X running
- USB-device which acts like an USB-keyboard (like many barcode-readers [1])
What i (don't) want:
- I want to use this device only for one specific application.
- I don't want to have this device interfere with e.g. the
loginprocess after booting or anything else - except the one application. - In any way, i want to be able to plug in a plain old USB keyboard an use it as such - independent of how many other USB-devices like mentioned above may be connected or not.
What i (don't) know:
- I found some example codes, about how to read directly from the event devices and can use this in my application, if needed.
- I don't know, how to disable a specific keyboard for the whole system except this specific application? Is this even possible?
Thanks for any hints ... !
[1] When the device reads a barcode, it's sends the detected code as single key presses and commits with return.
In a situation where an admin will enter sensitive information into a keyboard (the root password), what is the risk that a bluetooth keyboard (ship by default with Mac systems these days) would put those passwords at risk?
Another way of asking would be: what security and encryption protocols are used, if any, to establish a bluetooth connection between a keyboard and host system?
Edit: Final Summary
All answers are excellent. I accepted that which links to the most directly applicable information however I also encourage you to read Nathan Adams's response and discussion about security trade-offs.
In the mysql command line, pressing Control-C will cancel the programme, and bring you back to bash. In psql, the one for postgres, it will kill the current query and will not stop the psql programme. Is there any way to get the psql style behaviour for Control-C in the mysql programme? I keep finding myself pressing Control-C by habit and having to log back into mysql.
Control C doesn't kill bash, and log you out when you press it. Which I think is a good thing. Control-C means 'stop what you're doing'.
I used to have the caps lock and control swapped in GNOME, but when I upgraded to Ubuntu 9.04 I also changed my desktop environment to Xfce. I have the following line in my xorg.conf:
Option "XkbOptions" "ctrl:nocaps"
But that doesn't seem to make a difference to Xfce. Any ideas?