recoverd files

client.c

@@ -0,0 +1,116 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                  :::  o_   ::::::    :::   */
+/*   client.c                                      :+:  /    :+::+:    :+:    */
+/*                                                +:+   >   +:++:+    +:+     */
+/*   By: whaffman <whaffman@student.codam.nl>    +#+  +:+  +#++#++:++#++      */
+/*                                              +#+ +#+#+ +#++#+    +#+ \o/   */
+/*   Created: 2024/07/18 16:28:03 by whaffman   #+#+# #+#+# #+#    #+#   |    */
+/*   Updated: 2024/07/27 14:43:17 by whaffman   ###   ###  ###    ###   / \   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <signal.h>
+#include <unistd.h>
+#define SLEEP 100
+
+static volatile int	g_ack = 0;
+
+size_t	ft_strlen(const char *s)
+{
+	size_t	length;
+
+	length = 0;
+	while (*s++)
+		length++;
+	return (length);
+}
+
+void	ft_putstr(char *str)
+{
+	write(1, str, ft_strlen(str));
+}
+
+int	ft_isspace(int c)
+{
+	return (' ' == c || '\f' == c || '\n' == c
+		|| '\r' == c || '\t' == c || '\v' == c);
+}
+
+int	ft_isdigit(char c)
+{
+	return (c >= '0' && c <= '9');
+}
+
+int	ft_atoi(const char *nptr)
+{
+	int	sign;
+	int	res;
+
+	while (ft_isspace(*nptr))
+		nptr++;
+	res = 0;
+	sign = 1;
+	while (*nptr == '-' || *nptr == '+')
+	{
+		if (*nptr == '-')
+			sign *= -1;
+		nptr++;
+	}
+	while (ft_isdigit(*nptr))
+		res = 10 * res + sign * (*nptr++ - '0');
+	return (res);
+}
+
+int	send_byte(int pid, unsigned char c)
+{
+	int	i;
+
+	i = 0;
+	while (i < 8)
+	{
+		if ((c & 128) == 128)
+			kill(pid, SIGUSR1);
+		else
+			kill(pid, SIGUSR2);
+		c = c << 1;
+		usleep(SLEEP);
+		while (!g_ack)
+			pause();
+		g_ack = 0;
+		i++;
+	}
+	return (1);
+}
+
+int	send_message(int pid, char *msg)
+{
+	while (*msg)
+	{
+		send_byte(pid, *msg);
+		msg++;
+	}
+	send_byte(pid, '\0');
+	return (1);
+}
+
+void	sig(int signum)
+{
+	(void)signum;
+	g_ack = 1;
+}
+
+int	main(int argc, char *argv[])
+{
+	int	pid;
+
+	if (argc != 3)
+		ft_putstr("Usage: ./client <pid> <message>");
+	pid = ft_atoi(argv[1]);
+	if (pid <= 1)
+		return (1);
+	g_ack = 0;
+	signal(SIGUSR1, sig);
+	send_message(pid, argv[2]);
+	return (0);
+}

server.c

@@ -0,0 +1,71 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                  :::  o_   ::::::    :::   */
+/*   server.c                                      :+:  /    :+::+:    :+:    */
+/*                                                +:+   >   +:++:+    +:+     */
+/*   By: whaffman <whaffman@student.codam.nl>    +#+  +:+  +#++#++:++#++      */
+/*                                              +#+ +#+#+ +#++#+    +#+ \o/   */
+/*   Created: 2024/07/18 17:24:54 by whaffman   #+#+# #+#+# #+#    #+#   |    */
+/*   Updated: 2024/07/27 14:40:08 by whaffman   ###   ###  ###    ###   / \   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <signal.h>
+#include <unistd.h>
+#include <stdio.h>
+
+void	ft_putstr(char *str)
+{
+	int	i;
+
+	i = 0;
+	while (str[i])
+	{
+		i++;
+	}
+	write(1, str, i);
+}
+
+void	signal_handler(int signum, siginfo_t *info, void *context)
+{
+	static int		count = 0;
+	static char		c = '\0';
+	static pid_t	client_pid;
+
+	(void) context;
+	if (client_pid != info->si_pid)
+	{
+		count = 0;
+		c = '\0';
+		client_pid = info->si_pid;
+	}
+	c = c << 1;
+	if (signum == SIGUSR1)
+		c |= 1;
+	count++;
+	if (count == 8)
+	{
+		if (c)
+			write(1, &c, 1);
+		else
+			write(1, "\n", 1);
+		c = '\0';
+		count = 0;
+	}
+	kill(info->si_pid, SIGUSR1);
+	return ;
+}
+
+int	main(void)
+{
+	struct sigaction	sa;
+
+	printf("MiniTalk Server started on pid: %d\n", getpid());
+	sa.sa_sigaction = signal_handler;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = SA_SIGINFO;
+	sigaction(SIGUSR1, &sa, NULL);
+	sigaction(SIGUSR2, &sa, NULL);
+	while (1)
+		pause();
+}