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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* server.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: kdx <kdx @student.42angouleme.fr +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2022/10/09 03:37:08 by kdx #+# #+# */
/* Updated: 2022/10/12 05:32:45 by kdx ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft/libft.h"
#include <unistd.h>
#include <signal.h>
static uint8_t *g_buffer;
static void buffer_append(uint8_t byte)
{
uint8_t *new_buffer;
size_t len;
if (g_buffer == NULL)
{
g_buffer = ft_calloc(2, sizeof(char));
if (g_buffer == NULL)
exit(1);
g_buffer[0] = byte;
}
else
{
len = ft_strlen((char *)g_buffer);
new_buffer = ft_calloc(len + 2, sizeof(char));
if (new_buffer == NULL)
{
ft_free(g_buffer);
exit(1);
}
ft_strlcpy((char *)new_buffer, (char *)g_buffer, -1);
new_buffer[len] = byte;
ft_free(g_buffer);
g_buffer = new_buffer;
}
}
static void handler(int signum)
{
static uint8_t byte;
static size_t bit;
byte |= (signum == SIGUSR2) << bit;
bit += 1;
if (bit >= 8)
{
if (g_buffer != NULL && byte == 0)
{
write(1, g_buffer, ft_strlen((char *)g_buffer));
ft_free(g_buffer);
g_buffer = NULL;
}
else if (byte != 0)
buffer_append(byte);
byte = 0;
bit = 0;
}
return ;
}
static void sigint_handler(int signum)
{
(void)signum;
ft_free(g_buffer);
exit(0);
}
int main(void)
{
pid_t pid;
pid = getpid();
if (signal(SIGUSR1, handler) == SIG_ERR || signal(SIGUSR2, handler))
return (1);
if (signal(SIGINT, sigint_handler) == SIG_ERR)
return (1);
ft_puti128_fd(pid, 1);
ft_putchar_fd('\n', 1);
while (1)
;
return (0);
}
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