diff --git a/ripd/rip_main.c b/ripd/rip_main.c
new file mode 100644
index 0000000..1070fb4
--- /dev/null
+++ b/ripd/rip_main.c
@@ -0,0 +1,270 @@
+/* RIPd main routine.
+ * Copyright (C) 1997, 98 Kunihiro Ishiguro <kunihiro@zebra.org>
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
+#include <zebra.h>
+
+#include "version.h"
+#include "getopt.h"
+#include "thread.h"
+#include "command.h"
+#include "memory.h"
+#include "prefix.h"
+#include "filter.h"
+#include "keychain.h"
+#include "log.h"
+
+#include "ripd/ripd.h"
+
+/* ripd options. */
+static struct option longopts[] = 
+{
+  { "daemon",      no_argument,       NULL, 'd'},
+  { "config_file", required_argument, NULL, 'f'},
+  { "pid_file",    required_argument, NULL, 'i'},
+  { "help",        no_argument,       NULL, 'h'},
+  { "vty_addr",    required_argument, NULL, 'A'},
+  { "vty_port",    required_argument, NULL, 'P'},
+  { "retain",      no_argument,       NULL, 'r'},
+  { "version",     no_argument,       NULL, 'v'},
+  { 0 }
+};
+
+/* Configuration file and directory. */
+char config_current[] = RIPD_DEFAULT_CONFIG;
+char config_default[] = SYSCONFDIR RIPD_DEFAULT_CONFIG;
+char *config_file = NULL;
+
+/* ripd program name */
+
+/* Route retain mode flag. */
+int retain_mode = 0;
+
+/* RIP VTY bind address. */
+char *vty_addr = NULL;
+
+/* RIP VTY connection port. */
+int vty_port = RIP_VTY_PORT;
+
+/* Master of threads. */
+struct thread_master *master;
+
+/* Process ID saved for use by init system */
+char *pid_file = PATH_RIPD_PID;
+
+/* Help information display. */
+static void
+usage (char *progname, int status)
+{
+  if (status != 0)
+    fprintf (stderr, "Try `%s --help' for more information.\n", progname);
+  else
+    {    
+      printf ("Usage : %s [OPTION...]\n\
+Daemon which manages RIP version 1 and 2.\n\n\
+-d, --daemon       Runs in daemon mode\n\
+-f, --config_file  Set configuration file name\n\
+-i, --pid_file     Set process identifier file name\n\
+-A, --vty_addr     Set vty's bind address\n\
+-P, --vty_port     Set vty's port number\n\
+-r, --retain       When program terminates, retain added route by ripd.\n\
+-v, --version      Print program version\n\
+-h, --help         Display this help and exit\n\
+\n\
+Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
+    }
+
+  exit (status);
+}
+
+/* Signale wrapper. */
+RETSIGTYPE *
+signal_set (int signo, void (*func)(int))
+{
+  int ret;
+  struct sigaction sig;
+  struct sigaction osig;
+
+  sig.sa_handler = func;
+  sigemptyset (&sig.sa_mask);
+  sig.sa_flags = 0;
+#ifdef SA_RESTART
+  sig.sa_flags |= SA_RESTART;
+#endif /* SA_RESTART */
+
+  ret = sigaction (signo, &sig, &osig);
+
+  if (ret < 0) 
+    return (SIG_ERR);
+  else
+    return (osig.sa_handler);
+}
+
+/* SIGHUP handler. */
+void 
+sighup (int sig)
+{
+  zlog_info ("SIGHUP received");
+  rip_clean ();
+  rip_reset ();
+  zlog_info ("ripd restarting!");
+
+  /* Reload config file. */
+  vty_read_config (config_file, config_current, config_default);
+
+  /* Create VTY's socket */
+  vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
+
+  /* Try to return to normal operation. */
+}
+
+/* SIGINT handler. */
+void
+sigint (int sig)
+{
+  zlog (NULL, LOG_INFO, "Terminating on signal");
+
+  if (! retain_mode)
+    rip_clean ();
+
+  exit (0);
+}
+
+/* SIGUSR1 handler. */
+void
+sigusr1 (int sig)
+{
+  zlog_rotate (NULL);
+}
+
+/* Initialization of signal handles. */
+void
+signal_init ()
+{
+  signal_set (SIGHUP, sighup);
+  signal_set (SIGINT, sigint);
+  signal_set (SIGTERM, sigint);
+  signal_set (SIGPIPE, SIG_IGN);
+  signal_set (SIGUSR1, sigusr1);
+}
+
+/* Main routine of ripd. */
+int
+main (int argc, char **argv)
+{
+  char *p;
+  int daemon_mode = 0;
+  char *progname;
+  struct thread thread;
+
+  /* Set umask before anything for security */
+  umask (0027);
+
+  /* Get program name. */
+  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
+
+  /* First of all we need logging init. */
+  zlog_default = openzlog (progname, ZLOG_NOLOG, ZLOG_RIP,
+			   LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
+
+  /* Command line option parse. */
+  while (1) 
+    {
+      int opt;
+
+      opt = getopt_long (argc, argv, "df:hA:P:rv", longopts, 0);
+    
+      if (opt == EOF)
+	break;
+
+      switch (opt) 
+	{
+	case 0:
+	  break;
+	case 'd':
+	  daemon_mode = 1;
+	  break;
+	case 'f':
+	  config_file = optarg;
+	  break;
+	case 'A':
+	  vty_addr = optarg;
+	  break;
+        case 'i':
+          pid_file = optarg;
+          break;
+	case 'P':
+	  vty_port = atoi (optarg);
+	  break;
+	case 'r':
+	  retain_mode = 1;
+	  break;
+	case 'v':
+	  print_version (progname);
+	  exit (0);
+	  break;
+	case 'h':
+	  usage (progname, 0);
+	  break;
+	default:
+	  usage (progname, 1);
+	  break;
+	}
+    }
+
+  /* Prepare master thread. */
+  master = thread_master_create ();
+
+  /* Library initialization. */
+  signal_init ();
+  cmd_init (1);
+  vty_init ();
+  memory_init ();
+  keychain_init ();
+
+  /* RIP related initialization. */
+  rip_init ();
+  rip_if_init ();
+  rip_zclient_init ();
+  rip_peer_init ();
+
+  /* Sort all installed commands. */
+  sort_node ();
+
+  /* Get configuration file. */
+  vty_read_config (config_file, config_current, config_default);
+
+  /* Change to the daemon program. */
+  if (daemon_mode)
+    daemon (0, 0);
+
+  /* Pid file create. */
+  pid_output (pid_file);
+
+  /* Create VTY's socket */
+  vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
+
+  /* Execute each thread. */
+  while (thread_fetch (master, &thread))
+    thread_call (&thread);
+
+  /* Not reached. */
+  exit (0);
+}