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client.c
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client.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* client.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: xle-boul <xle-boul@student.s19.be> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/02/13 10:58:19 by xle-boul #+# #+# */
/* Updated: 2022/02/21 20:22:12 by xle-boul ### ########.fr */
/* */
/* ************************************************************************** */
#include "minitalk.h"
void ft_error_handler(int i)
{
if (i == 0)
{
write(1, "Error KILL\n", 12);
exit(1);
}
if (i == 1)
{
write(1, "Error SIGACTION\n", 17);
exit(1);
}
}
void ft_send_terminator(int pid)
{
static int i = 0;
if (i <= 8)
if (kill(pid, SIGUSR1) == -1)
ft_error_handler(0);
i++;
}
void ft_send_signal(int pid, char *str)
{
static int bit = 0;
static char *str_bis = 0;
if (str)
str_bis = str;
if (*str_bis)
{
if ((((unsigned char)*str_bis >> bit) % 2) == 0)
if (kill(pid, SIGUSR1) == -1)
ft_error_handler(0);
if ((((unsigned char)*str_bis >> bit) % 2) == 1)
if (kill(pid, SIGUSR2) == -1)
ft_error_handler(0);
bit++;
if (bit == 8)
{
str_bis++;
bit = 0;
}
}
if (!(*str_bis))
ft_send_terminator(pid);
}
void ft_receipt(int sig, siginfo_t *info, void *context)
{
static int id;
if (info->si_pid != 0)
id = info->si_pid;
(void)context ;
if (sig == SIGUSR1)
ft_send_signal(id, NULL);
if (sig == SIGUSR2)
exit(EXIT_SUCCESS);
}
int main(int ac, char **av)
{
struct sigaction action;
action.sa_flags = SA_SIGINFO;
action.sa_sigaction = ft_receipt;
if (sigaction(SIGUSR1, &action, NULL) == -1
|| sigaction(SIGUSR2, &action, NULL) == -1)
ft_error_handler(1);
if (ac != 3)
{
write(1, "Utilisez le format: ./client <PID> <String>\n", 44);
exit(EXIT_FAILURE);
}
ft_send_signal(ft_atoi(av[1]), av[2]);
while (1)
pause();
return (0);
}