1 files changed, 103 insertions, 0 deletions
diff --git a/cmd/gobgpd/util.go b/cmd/gobgpd/util.go
new file mode 100644
index 00000000..1b7885b8
--- /dev/null
+++ b/cmd/gobgpd/util.go
@@ -0,0 +1,103 @@
+// Copyright (C) 2017 Nippon Telegraph and Telephone Corporation.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !windows
+
+package main
+
+import (
+	"log/syslog"
+	"os"
+	"os/signal"
+	"runtime"
+	"runtime/debug"
+	"strings"
+	"syscall"
+
+	log "github.com/sirupsen/logrus"
+	lSyslog "github.com/sirupsen/logrus/hooks/syslog"
+)
+
+func init() {
+	go func() {
+		sigCh := make(chan os.Signal, 1)
+		signal.Notify(sigCh, syscall.SIGUSR1)
+		for range sigCh {
+			runtime.GC()
+			debug.FreeOSMemory()
+		}
+	}()
+}
+
+func addSyslogHook(host, facility string) error {
+	dst := strings.SplitN(host, ":", 2)
+	network := ""
+	addr := ""
+	if len(dst) == 2 {
+		network = dst[0]
+		addr = dst[1]
+	}
+
+	priority := syslog.Priority(0)
+	switch facility {
+	case "kern":
+		priority = syslog.LOG_KERN
+	case "user":
+		priority = syslog.LOG_USER
+	case "mail":
+		priority = syslog.LOG_MAIL
+	case "daemon":
+		priority = syslog.LOG_DAEMON
+	case "auth":
+		priority = syslog.LOG_AUTH
+	case "syslog":
+		priority = syslog.LOG_SYSLOG
+	case "lpr":
+		priority = syslog.LOG_LPR
+	case "news":
+		priority = syslog.LOG_NEWS
+	case "uucp":
+		priority = syslog.LOG_UUCP
+	case "cron":
+		priority = syslog.LOG_CRON
+	case "authpriv":
+		priority = syslog.LOG_AUTHPRIV
+	case "ftp":
+		priority = syslog.LOG_FTP
+	case "local0":
+		priority = syslog.LOG_LOCAL0
+	case "local1":
+		priority = syslog.LOG_LOCAL1
+	case "local2":
+		priority = syslog.LOG_LOCAL2
+	case "local3":
+		priority = syslog.LOG_LOCAL3
+	case "local4":
+		priority = syslog.LOG_LOCAL4
+	case "local5":
+		priority = syslog.LOG_LOCAL5
+	case "local6":
+		priority = syslog.LOG_LOCAL6
+	case "local7":
+		priority = syslog.LOG_LOCAL7
+	}
+
+	hook, err := lSyslog.NewSyslogHook(network, addr, syslog.LOG_INFO|priority, "bgpd")
+	if err != nil {
+		return err
+	}
+	log.AddHook(hook)
+	return nil
+}