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diff --git a/isisd/isis_main.c b/isisd/isis_main.c
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+/*
+ * IS-IS Rout(e)ing protocol - isis_main.c
+ *
+ * Copyright (C) 2001,2002 Sampo Saaristo
+ * Tampere University of Technology
+ * Institute of Communications Engineering
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public Licenseas published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program 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 this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <zebra.h>
+
+#include "getopt.h"
+#include "thread.h"
+#include "log.h"
+#include <lib/version.h>
+#include "command.h"
+#include "vty.h"
+#include "memory.h"
+#include "stream.h"
+#include "if.h"
+#include "privs.h"
+#include "sigevent.h"
+#include "filter.h"
+#include "plist.h"
+#include "zclient.h"
+#include "vrf.h"
+#include "qobj.h"
+#include "libfrr.h"
+#include "routemap.h"
+
+#include "isisd/isis_constants.h"
+#include "isisd/isis_common.h"
+#include "isisd/isis_flags.h"
+#include "isisd/isis_circuit.h"
+#include "isisd/isisd.h"
+#include "isisd/isis_dynhn.h"
+#include "isisd/isis_spf.h"
+#include "isisd/isis_route.h"
+#include "isisd/isis_routemap.h"
+#include "isisd/isis_zebra.h"
+#include "isisd/isis_te.h"
+#include "isisd/isis_errors.h"
+#include "isisd/isis_bfd.h"
+#include "isisd/isis_lsp.h"
+#include "isisd/isis_mt.h"
+#include "isisd/fabricd.h"
+#include "isisd/isis_nb.h"
+#include "isisd/isis_ldp_sync.h"
+
+/* Default configuration file name */
+#define ISISD_DEFAULT_CONFIG "isisd.conf"
+/* Default vty port */
+#define ISISD_VTY_PORT 2608
+#define FABRICD_VTY_PORT 2618
+
+/* isisd privileges */
+zebra_capabilities_t _caps_p[] = {ZCAP_NET_RAW, ZCAP_BIND, ZCAP_SYS_ADMIN};
+
+struct zebra_privs_t isisd_privs = {
+#if defined(FRR_USER)
+ .user = FRR_USER,
+#endif
+#if defined FRR_GROUP
+ .group = FRR_GROUP,
+#endif
+#ifdef VTY_GROUP
+ .vty_group = VTY_GROUP,
+#endif
+ .caps_p = _caps_p,
+ .cap_num_p = array_size(_caps_p),
+ .cap_num_i = 0};
+
+/* isisd options */
+static const struct option longopts[] = {
+ {"int_num", required_argument, NULL, 'I'},
+ {0}};
+
+/* Master of threads. */
+struct thread_master *master;
+
+/*
+ * Prototypes.
+ */
+void sighup(void);
+void sigint(void);
+void sigterm(void);
+void sigusr1(void);
+
+
+static __attribute__((__noreturn__)) void terminate(int i)
+{
+ isis_terminate();
+ isis_sr_term();
+ isis_zebra_stop();
+ exit(i);
+}
+
+/*
+ * Signal handlers
+ */
+#ifdef FABRICD
+void sighup(void)
+{
+ zlog_notice("SIGHUP/reload is not implemented for fabricd");
+ return;
+}
+#else
+static struct frr_daemon_info isisd_di;
+void sighup(void)
+{
+ zlog_info("SIGHUP received");
+
+ /* Reload config file. */
+ vty_read_config(NULL, isisd_di.config_file, config_default);
+}
+
+#endif
+
+__attribute__((__noreturn__)) void sigint(void)
+{
+ zlog_notice("Terminating on signal SIGINT");
+ terminate(0);
+}
+
+__attribute__((__noreturn__)) void sigterm(void)
+{
+ zlog_notice("Terminating on signal SIGTERM");
+ terminate(0);
+}
+
+void sigusr1(void)
+{
+ zlog_debug("SIGUSR1 received");
+ zlog_rotate();
+}
+
+struct frr_signal_t isisd_signals[] = {
+ {
+ .signal = SIGHUP,
+ .handler = &sighup,
+ },
+ {
+ .signal = SIGUSR1,
+ .handler = &sigusr1,
+ },
+ {
+ .signal = SIGINT,
+ .handler = &sigint,
+ },
+ {
+ .signal = SIGTERM,
+ .handler = &sigterm,
+ },
+};
+
+
+static const struct frr_yang_module_info *const isisd_yang_modules[] = {
+ &frr_filter_info,
+ &frr_interface_info,
+#ifndef FABRICD
+ &frr_isisd_info,
+#endif /* ifndef FABRICD */
+ &frr_route_map_info,
+ &frr_vrf_info,
+};
+
+#ifdef FABRICD
+FRR_DAEMON_INFO(fabricd, OPEN_FABRIC, .vty_port = FABRICD_VTY_PORT,
+
+ .proghelp = "Implementation of the OpenFabric routing protocol.",
+#else
+FRR_DAEMON_INFO(isisd, ISIS, .vty_port = ISISD_VTY_PORT,
+
+ .proghelp = "Implementation of the IS-IS routing protocol.",
+#endif
+ .copyright =
+ "Copyright (c) 2001-2002 Sampo Saaristo, Ofer Wald and Hannes Gredler",
+
+ .signals = isisd_signals,
+ .n_signals = array_size(isisd_signals),
+
+ .privs = &isisd_privs, .yang_modules = isisd_yang_modules,
+ .n_yang_modules = array_size(isisd_yang_modules),
+);
+
+/*
+ * Main routine of isisd. Parse arguments and handle IS-IS state machine.
+ */
+int main(int argc, char **argv, char **envp)
+{
+ int opt;
+ int instance = 1;
+
+#ifdef FABRICD
+ frr_preinit(&fabricd_di, argc, argv);
+#else
+ frr_preinit(&isisd_di, argc, argv);
+#endif
+ frr_opt_add(
+ "I:", longopts,
+ " -I, --int_num Set instance number (label-manager)\n");
+
+ /* Command line argument treatment. */
+ while (1) {
+ opt = frr_getopt(argc, argv, NULL);
+
+ if (opt == EOF)
+ break;
+
+ switch (opt) {
+ case 0:
+ break;
+ case 'I':
+ instance = atoi(optarg);
+ if (instance < 1 || instance > (unsigned short)-1)
+ zlog_err("Instance %i out of range (1..%u)",
+ instance, (unsigned short)-1);
+ break;
+ default:
+ frr_help_exit(1);
+ }
+ }
+
+ /* thread master */
+ isis_master_init(frr_init());
+ master = im->master;
+ /*
+ * initializations
+ */
+ isis_error_init();
+ access_list_init();
+ access_list_add_hook(isis_filter_update);
+ access_list_delete_hook(isis_filter_update);
+ isis_vrf_init();
+ prefix_list_init();
+ prefix_list_add_hook(isis_prefix_list_update);
+ prefix_list_delete_hook(isis_prefix_list_update);
+ isis_init();
+ isis_circuit_init();
+#ifdef FABRICD
+ isis_vty_daemon_init();
+#endif /* FABRICD */
+#ifndef FABRICD
+ isis_cli_init();
+#endif /* ifdef FABRICD */
+ isis_spf_init();
+ isis_redist_init();
+ isis_route_map_init();
+ isis_mpls_te_init();
+ isis_sr_init();
+ lsp_init();
+ mt_init();
+
+ isis_zebra_init(master, instance);
+ isis_bfd_init(master);
+ isis_ldp_sync_init();
+ fabricd_init();
+
+ frr_config_fork();
+ frr_run(master);
+
+ /* Not reached. */
+ exit(0);
+}