client_bonus.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   client_bonus.c                                     :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jilai <jilai@student.42.fr>                +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/04/28 15:11:39 by jilai             #+#    #+#             */
/*   Updated: 2024/04/28 15:11:41 by jilai            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "client_bonus.h"

void	handle_signal(int sig, siginfo_t *i, void *context)
{
	(void)sig;
	(void)i;
	(void)context;
	if (sig == SIGUSR1)
		ft_printf("String received by PID: %i\n", i->si_pid);
	exit(EXIT_SUCCESS);
}

void	send_char_bits(int pid, unsigned char ch)
{
	int				i;
	unsigned char	tmp;

	i = 8;
	tmp = ch;
	while (i > 0)
	{
		i--;
		tmp = ch >> i;
		if (tmp % 2 == 0)
			kill(pid, SIGUSR2);
		else
			kill(pid, SIGUSR1);
		usleep(42);
	}
}

int	main(int argc, char *argv[])
{
	int					pid;
	int					i;
	struct sigaction	s;

	if (argc != 3)
		exit(EXIT_FAILURE);
	pid = atoi(argv[1]);
	i = 0;
	s.sa_sigaction = handle_signal;
	s.sa_flags = SA_SIGINFO;
	sigaction(SIGUSR1, &s, NULL);
	while (argv[2][i])
	{
		send_char_bits(pid, (unsigned char)(argv[2][i]));
		i++;
	}
	send_char_bits(pid, (unsigned char)('\0'));
	while (1)
		pause();
	return (0);
}