minitalk/server.c at master · acmmarques/minitalk · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   server.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: andcardo <andcardo@student.42lisboa.com>   +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/11/05 15:56:43 by andcardo          #+#    #+#             */
/*   Updated: 2025/12/03 18:10:56 by andcardo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "minitalk.h"

t_s_data	g_s_data;

static void	signal_handler(int signal, siginfo_t *info, void *context)
{
	(void)context;
	if (signal == SIGUSR1)
		g_s_data.c |= (1 << (7 - g_s_data.bit_index));
	g_s_data.bit_index++;
	if (g_s_data.bit_index == 8)
	{
		g_s_data.buffer[g_s_data.buffer_index] = g_s_data.c;
		g_s_data.buffer_index++;
		if (g_s_data.buffer_index == BUF_SIZE)
		{
			write(1, g_s_data.buffer, BUF_SIZE);
			g_s_data.buffer_index = 0;
		}
		else if (g_s_data.c == '\0')
		{
			write(1, g_s_data.buffer, g_s_data.buffer_index - 1);
			g_s_data.buffer_index = 0;
		}
		g_s_data.bit_index = 0;
		g_s_data.c = 0;
	}
	kill(info->si_pid, SIGUSR1);
}

static void	print_s_data_pid(void)
{
	char	*pid_str;

	pid_str = ft_itoa(getpid());
	if (!pid_str)
	{
		write(2, "Error: Malloc failed\n", 21);
		exit(1);
	}
	write(1, "Server PID: ", 12);
	write(1, pid_str, ft_strlen(pid_str));
	write(1, "\n", 1);
	free(pid_str);
}

static void	setup_action(void)
{
	struct sigaction	sa;

	sa.sa_sigaction = signal_handler;
	sa.sa_flags = SA_SIGINFO;
	sigemptyset(&sa.sa_mask);
	sigaction(SIGUSR1, &sa, NULL);
	sigaction(SIGUSR2, &sa, NULL);
}

int	main(void)
{
	g_s_data.bit_index = 0;
	g_s_data.c = 0;
	g_s_data.buffer_index = 0;
	ft_bzero(g_s_data.buffer, BUF_SIZE);
	print_s_data_pid();
	setup_action();
	while (1)
		pause();
	return (0);
}