Programming API example (HTTP client)

struct addrinfo hints, *res;
int s;

memset(&hints, 0, sizeof(hints));
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if (getaddrinfo("www.freebsd.org", "http", &hints, &res) != 0) {
    exit(1);
}
for (/*nothing*/; res; res = res->ai_next) {
    s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
    if (s < 0)
        continue;
    if (connect(s, res->ai_addr, res->ai_addrlen) < 0) {
        close(s);
        s = -1;
        continue;
    }

    break;
}

write(s, "GET /\r\n", 7);
/* bla bla bla */