Re: Is it possible to catch ALT+TAB and do nothing

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Given your earlier mails, the thing you want to achieve is near to impossible. Even if you donʼt give focus to every terminal app that can ever exist, I can press Ctrl-Alt-F2 to go to the textual console and do whatever Iʼd like. If there is one thing in the X world you canʼt catch is this (and maybe Ctrl-Alt-Backspace). Of course, you can disable those in the X config. If a regular user can install software on the machine, you stand no chance; even without root access it is possible.

If you donʼt want the user to interact with the computer at a specific time, why not firing up the password protected screen saver?

On Tue, May 8, 2018, 00:46 James Cameron <quozl@xxxxxxxxxx> wrote:
On Mon, May 07, 2018 at 05:03:40PM -0500, Igor Korot wrote:
> James,
>
> On Mon, May 7, 2018 at 4:46 PM, James Cameron <quozl@xxxxxxxxxx> wrote:
> > On Mon, May 07, 2018 at 04:27:57PM -0500, Igor Korot wrote:
> >> Paul et al,
> >> Any idea how to configure FVWM to not to give focus to xterm if one
> >> specific window is displayed?
> >
> > You might ask on an fvwm mailing list, but fvwm does have a
> > NeverFocus method that can be applied to an application such as xterm.
>
> Yes, just subscribed to their forum and will ask that question.
> >
> > http://www.fvwm.org/documentation/manpages/fvwm.html
> >
> > But that would just fix your problem for xterm; to enforce focus for a
> > lock screen, there's more to do.  Have a look at the code for other
> > lock screens to find out what that is.
>
> We do not provide any external application where the user can interact
> with the keyboard/focus handling
> in order to try and guess the information that should be secured.
> Only the xterm is a concern.

If this is an embedded system or kiosk application, replace xterm with
something of your own making that uses libvte as a widget.  That way
you can assert full control over when the widget is visible.

I've found VTE acceptable for most use cases I've thrown at it.

Though I still use xterm when I can.

> [...]

--
James Cameron
http://quozl.netrek.org/
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