Initial revision
diff --git a/zebra/main.c b/zebra/main.c
new file mode 100644
index 0000000..25d8b6d
--- /dev/null
+++ b/zebra/main.c
@@ -0,0 +1,316 @@
+/*
+ * zebra daemon main routine.
+ * Copyright (C) 1997, 98 Kunihiro Ishiguro
+ *
+ * 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 "command.h"
+#include "thread.h"
+#include "filter.h"
+#include "memory.h"
+#include "prefix.h"
+#include "log.h"
+
+#include "zebra/rib.h"
+#include "zebra/zserv.h"
+#include "zebra/debug.h"
+#include "zebra/rib.h"
+
+/* Master of threads. */
+struct thread_master *master;
+
+/* process id. */
+pid_t old_pid;
+pid_t pid;
+
+/* Route retain mode flag. */
+int retain_mode = 0;
+
+/* Don't delete kernel route. */
+int keep_kernel_mode = 0;
+
+/* Command line options. */
+struct option longopts[] =
+{
+ { "batch", no_argument, NULL, 'b'},
+ { "daemon", no_argument, NULL, 'd'},
+ { "keep_kernel", no_argument, NULL, 'k'},
+ { "log_mode", no_argument, NULL, 'l'},
+ { "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 }
+};
+
+/* Default configuration file path. */
+char config_current[] = DEFAULT_CONFIG_FILE;
+char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE;
+
+/* Process ID saved for use by init system */
+char *pid_file = PATH_ZEBRA_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\n\
+Daemon which manages kernel routing table management and \
+redistribution between different routing protocols.\n\n\
+-b, --batch Runs in batch mode\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\
+-k, --keep_kernel Don't delete old routes which installed by zebra.\n\
+-l, --log_mode Set verbose log mode flag\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 zebra.\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);
+}
+
+/* SIGHUP handler. */
+void
+sighup (int sig)
+{
+ zlog_info ("SIGHUP received");
+
+ /* Reload of config file. */
+ ;
+}
+
+/* SIGINT handler. */
+void
+sigint (int sig)
+{
+ /* Decrared in rib.c */
+ void rib_close ();
+
+ zlog_info ("Terminating on signal");
+
+ if (!retain_mode)
+ rib_close ();
+
+ exit (0);
+}
+
+/* SIGUSR1 handler. */
+void
+sigusr1 (int sig)
+{
+ zlog_rotate (NULL);
+}
+
+/* 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);
+}
+
+/* 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 startup routine. */
+int
+main (int argc, char **argv)
+{
+ char *p;
+ char *vty_addr = NULL;
+ int vty_port = 0;
+ int batch_mode = 0;
+ int daemon_mode = 0;
+ char *config_file = NULL;
+ char *progname;
+ struct thread thread;
+ void rib_weed_tables ();
+ void zebra_vty_init ();
+
+ /* Set umask before anything for security */
+ umask (0027);
+
+ /* preserve my name */
+ progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
+
+ zlog_default = openzlog (progname, ZLOG_STDOUT, ZLOG_ZEBRA,
+ LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
+
+ while (1)
+ {
+ int opt;
+
+ opt = getopt_long (argc, argv, "bdklf:hA:P:rv", longopts, 0);
+
+ if (opt == EOF)
+ break;
+
+ switch (opt)
+ {
+ case 0:
+ break;
+ case 'b':
+ batch_mode = 1;
+ case 'd':
+ daemon_mode = 1;
+ break;
+ case 'k':
+ keep_kernel_mode = 1;
+ break;
+ case 'l':
+ /* log_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;
+ }
+ }
+
+ /* Make master thread emulator. */
+ master = thread_master_create ();
+
+ /* Vty related initialize. */
+ signal_init ();
+ cmd_init (1);
+ vty_init ();
+ memory_init ();
+
+ /* Zebra related initialize. */
+ zebra_init ();
+ rib_init ();
+ zebra_if_init ();
+ zebra_debug_init ();
+ zebra_vty_init ();
+ access_list_init ();
+ rtadv_init ();
+
+ /* For debug purpose. */
+ /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */
+
+ /* Make kernel routing socket. */
+ kernel_init ();
+ interface_list ();
+ route_read ();
+
+ /* Sort VTY commands. */
+ sort_node ();
+
+#ifdef HAVE_SNMP
+ zebra_snmp_init ();
+#endif /* HAVE_SNMP */
+
+ /* Clean up self inserted route. */
+ if (! keep_kernel_mode)
+ rib_sweep_route ();
+
+ /* Configuration file read*/
+ vty_read_config (config_file, config_current, config_default);
+
+ /* Clean up rib. */
+ rib_weed_tables ();
+
+ /* Exit when zebra is working in batch mode. */
+ if (batch_mode)
+ exit (0);
+
+ /* Needed for BSD routing socket. */
+ old_pid = getpid ();
+
+ /* Daemonize. */
+ if (daemon_mode)
+ daemon (0, 0);
+
+ /* Output pid of zebra. */
+ pid_output (pid_file);
+
+ /* Needed for BSD routing socket. */
+ pid = getpid ();
+
+ /* Make vty server socket. */
+ vty_serv_sock (vty_addr,
+ vty_port ? vty_port : ZEBRA_VTY_PORT, ZEBRA_VTYSH_PATH);
+
+ while (thread_fetch (master, &thread))
+ thread_call (&thread);
+
+ /* Not reached... */
+ exit (0);
+}