Initial revision
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);
+}