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Top Forums Shell Programming and Scripting Launching mplayer from within Links2 using a shell script Post 303025371 by Corona688 on Wednesday 31st of October 2018 02:30:01 PM
Old 10-31-2018
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.

Last edited by Corona688; 10-31-2018 at 03:37 PM..
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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