Here you go

#include <iostream>
#include <csignal>
#include <unistd.h>

void sigusr1_handler(int signal)
{
	std::cout << "Signal USR1" << std::endl;
}

int main()
{
	std::cout << "Installed handler for USR1" << std::endl;
	std::signal(SIGUSR1, sigusr1_handler);
	while (1 == 1)
	{
		usleep(5000000);	// 5 seconds
		std::cout << "Waiting for signal" << std::endl;
	}
}

That will help you read at least one of them.

How to be a neurotypical:

1 - Have a somewhat societally common and shared, but also very unique and specific to yourself/particular social group, way of understanding and projecting tone, microexpressions, vocabulary choices, speech cadence, etc, with many distinct or uncommon idiosyncrasies.

2 - Assume everyone else on the planet has essentially the exact same way of seeing and performing all this as you do.

3 - Confidently interperet social cues incorrectly considerably more often than Autists, but be blissfully unaware of this, pathologize and shame the idea of asking for clarity and communicating in a direct, precise, and less ambiguous way.

… Autistic people consciously learn, process and evaluate how social cues actually work, and Autistic people also very much like logically consistent things that are not contradictory… so they are more likely to either be very rigid with one way of understanding something, or to.ask questions to clarify things that are not actually clear, consistent, universal, precise.

It thus takes them longer to learn how to adaquetly perform all this, aka, Masking.

Neurotypicals on the other hand learn, process and evaluate and perform social cues much more unconsciously, and they are far more likely to just assume their interpretation is correct, that their projected behaviors convey exactly what they think they do… despite the fact that if you sit a bunch of them down, they will all describe significant differences between their ways of understanding and performing mannerisms.

Essentially, they’re bullshitting it, but there are more bullshitters than non bullshitters, so bullshitting is the norm.