Added 10 more gists.

hosts.c/README.md

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+A simple test of gethostbyname()

hosts.c/hosts.c

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+#include <stdio.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+typedef struct in_addr addr_t;
+
+int main(void) {
+	int i;
+	char * hostname = argc > 1 ? argv[1] : "google.com";
+	struct hostent * host = gethostbyname(hostname);
+  
+	if (host == NULL) {
+		herror(argv[0]);
+		return 1;
+	} else {
+    
+		/* Print standard host name. */
+		printf("NAME: %s\n", host->h_name);
+
+		/* Print all host aliases if any. */
+		for (i = 0; host->h_aliases[i]; i++)
+			printf("ALIAS %d: %s\n", i, host->h_aliases[i]);
+
+		/* Print if addresses are IPv4 or IPv6. */
+		printf("TYPE: %s\n", host->h_addrtype == AF_INET ? "IPv4" : "IPv6");
+
+		/* Print address length in bytes. */
+		printf("LENGTH: %d\n", host->h_length);
+
+		/* Print all addresses. */
+		for (i = 0; host->h_addr_list[i]; i++) {
+			addr_t * addr = (addr_t *)host->h_addr_list[i];
+			printf("ADDR: %s\n", inet_ntoa(*addr));
+		}
+	}
+
+	return 0;
+}