#include <sys/socket.h>
#include <sys/un.h>
#include <stdio.h>
#include <unistd.h>

int main(int argc, char *argv[]) {
	int fd = socket(AF_UNIX, SOCK_STREAM, 0);
	if (fd < 0) {
		perror("socket");
		return 1;
	}

	struct sockaddr_un addr = {
		.sun_family = AF_UNIX,
		.sun_path = "socket",
	};
	if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
		perror("connect");
		return 1;
	}

	int data = 42;
	if (write(fd, &data, sizeof(data)) < 0) {
		perror("write");
		return 1;
	}

	read(fd, &data, sizeof(data));

	return 0;
}