Shell Programming and Scripting

I have asked a number of questions over at stack* sites over the years and for some reason I never get an answer there either.

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Could you find out? This will list all libaries SDL links to: ldd /usr/lib/*SDL*.so

Not an SDL limitation, a side-effect of the way the keyboard and screen is being used. Which depends on what backend is being used. Sorry if I sound like a broken record but that's a really important unknown.

A link to the patch you used to get Links using SDL would also be good. I've a passing familiary with SDL and can check if I see anything obviously wrong.

That you're compiling is also useful. We might add lines to answer the question if we really can't find it out any other way.

Ok.

------ Post updated at 05:39 PM ------

Ok. Here's the ldd output: http://www.armory.com/~ignatius/bleh

And here's a link to the patch: https://devel.dob.sk/links-sdl/links...dl-0.1.3.patch

Okay, that gives me enough information to research. I think you're using libsdl's fbcon. According to your patch there should be debug information being printed into a stderr.txt somewhere.

Looking at the source code, libSDL's fbcon module sets raw mode on the keyboard, which according to this prevents not just ctrl-alt-f4 but the chvt call itself from operating. Preventing this will probably stop Links from working.

Hunting for SDL_getenv - the usual transport for special-case SDL backend hacks - in fbcon's source shows a few options related to setting resolution and mouse device, but nothing relevant to keyboard. It just grabs it in raw mode - as it should for a graphical program - and that's it.

So, I think this means that Links needs to call SDL_QuitSubSystem(SDL_INIT_EVENTS) before shelling out to an external command, and SDL_InitSubSystem(SDL_INIT_EVENTS) after returning from an external command, to place the keyboard into normal mode and allow chvt to happen when using the fbcon module.

Ok. Understood. I'm currently trying to compile Links2 with the FBDev driver. It seems to work on my desktop, with chvt and console redirecting.

If it's an X11 window, it's not using fbdev...