#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>

static void bail(const char *on_what) {
	perror(on_what);
	exit(1);
}

int main(int argc, char **argv, char **envp) {
	int z;
	int sck_inet;
	struct sockaddr_in adr_inet;
	int len_inet;
	const unsigned char IPno[] = {127,0,0,1};
	
	sck_inet = socket(AF_INET,SOCK_STREAM,0);
	
	if(sck_inet == -1)
		bail("socket()");
	
	memset(&adr_inet,0,sizeof adr_inet);
	
	adr_inet.sin_family = AF_INET;
	adr_inet.sin_port = htons(9000);
	memcpy(&adr_inet.sin_addr.s_addr,IPno,4);
	len_inet = sizeof adr_inet;
	
	z = bind(sck_inet,
		(struct sockaddr *)&adr_inet,
		len_inet);
	
	if(z == -1)
		bail("bind()");
	
	system("netstat -pan --tcp 2>/dev/null | "
		"sed -n '1,/^Proto/p;/af_inet/p' ");
	
	close(sck_inet);
	return 0;
}