WIP: Update lxqtbacklight_backend.c

[damianatorrpm]

adds 3 cmd options (I use them to pipe the output as the original show method does not exactly what it says / I need)

    } if( !strcmp(argv[n], "--show-max") ) {
            show_max();
            return 0;
        } if( !strcmp(argv[n], "--show-value") ) {
            show_val();
            return 0;
        } if( !strcmp(argv[n], "--show-driver") ) {

[luis-pereira]

@damianatorrpm You are right, it doesn't do what it says. Also the --show option documentation needs revision (it doesn't states what it outputs).

Doesn't
lxqt-backlight_backend --show | cut -d' ' -f1 --> driver
lxqt-backlight_backend --show | cut -d' ' -f2 --> max_value
lxqt-backlight_backend --show | cut -d' ' -f3 --> actual_vaule

cut it ?

[damianatorrpm]

Well it would show the same output, yet I think that is messy, as one has to remember the syntax for cut, as well as it makes it harder to be used due to ' characters in QPocess::startDetached('lxqt-backlight') and similar. In the end one can use a shell script to just find the directory for the backlight driver, but than there is lxqt-backlight_backend.
Do you mean the description of the commands would need updating before such a pr can be accepted?

[luis-pereira]

@damianatorrpm lxqt-backlight_backend is a privileged executable (pkexec allowed without password).
I'm trying to keep it as simple as possible.
I'm not sure I understood what you are trying to achieve. Can you explain it in a more detailed manner ?

The format of the show command needs to be added. In this OR another PR.