--- agetty.c	2002-07-29 09:36:42.000000000 +0200
+++ /home/users/genone/projekte/misc/agetty-with-dns.c	2003-07-13 04:24:01.000000000 +0200
@@ -30,6 +30,7 @@
 #include <getopt.h>
 #include <time.h>
 #include <sys/file.h>
+#include <netdb.h>
 #include "xstrncpy.h"
 #include "nls.h"
 
@@ -122,6 +123,17 @@
 #define	BUFSIZ		1024
 #endif
 
+/* set a maximum length for the hostname,  */
+#ifdef HOST_NAME_MAX			
+	/* defined by POSIX */
+	#define HOSTNAME_LENGTH HOST_NAME_MAX
+#elif defined(MAXHOSTNAMELEN)		
+	/* implemented in current Unix-versions */
+	#define HOSTNAME_LENGTH MAXHOSTNAMELEN
+#else
+	#define HOSTNAME_LENGTH 500
+#endif
+
  /*
   * When multiple baud rates are specified on the command line, the first one
   * we will try is the first one specified.
@@ -878,7 +890,25 @@
 		     printf ("%s", domainname);
 		   }
 		  break;
-
+		  
+		  case 'O':
+		  {
+			char *domain = NULL;
+			char host[HOSTNAME_LENGTH + 1];
+			struct hostent *hp = NULL;
+			
+			if (gethostname(host, HOSTNAME_LENGTH) || !(hp = gethostbyname(host))) {
+				domain = "unknown_domain";
+			} else {
+				/* get the substring after the first . */
+				domain = strchr(hp->h_name, '.');
+				if (domain == NULL)
+					domain = ".(none)";
+			}
+			printf("%s", ++domain);
+		  }  
+		  break;
+		  
 		  case 'd':
 		  case 't':
 		    {