#include<sys/types.h>
#include<ifaddrs.h>
#include<unistd.h>
#include<stdio.h>
#include<netinet/ip.h>
#include<arpa/inet.h>
#include<string.h>

int main(){

	// get ip address
	// get last byte of the ip address
	// assemble a hostname like mlh310-(last byte of the ip address)
	struct ifaddrs *ifa_start;
	getifaddrs(&ifa_start);

	uint32_t address;
	for(struct ifaddrs *i = ifa_start; i; i = i->ifa_next){
		printf("Interface:  %s\n", i->ifa_name);
		if(i->ifa_addr->sa_family == AF_INET){
			printf("IPv4 address detected!\n");
			struct sockaddr_in *a = (struct sockaddr_in*)i->ifa_addr;
			printf("%s\n", inet_ntoa(a->sin_addr));
			address = a->sin_addr.s_addr;
		}

	}

	unsigned char last_byte;
	char new_hostname[128];
	char *address_as_array = (char*)&address;
	sprintf(new_hostname, "mlh310-%d", address_as_array[3]);
	printf("New name:  %s\n", new_hostname);
	sethostname(new_hostname, strlen(new_hostname));
	
	return 0;
}