#include <stdio.h>
#include <stdlib.h>
#include <netdb.h>

int main(int argc, char **argv)
{
	char service[] = "echo";
	char protocol[] = "tcp";
	struct servent *p = getservbyname(service, protocol);

	if (p == NULL) {
		fprintf(stderr, "%s: service %s with protocol %s not found\n",
			argv[0], service, protocol);
		return EXIT_FAILURE;
	}

	printf("service name %s\n", p->s_name);
	printf("port number %d\n", p->s_port);
	printf("protocol %s\n", p->s_proto);

	return EXIT_SUCCESS;
}