move syslog into logger

internal/logger/syslog_unix.go

@@ -0,0 +1,31 @@
+// +build !windows
+
+package logger
+
+import (
+	"io"
+	native "log/syslog"
+)
+
+type syslog struct {
+	inner *native.Writer
+}
+
+func newSyslog(prefix string) (io.WriteCloser, error) {
+	inner, err := native.New(native.LOG_INFO|native.LOG_DAEMON, prefix)
+	if err != nil {
+		return nil, err
+	}
+
+	return &syslog{
+		inner: inner,
+	}, nil
+}
+
+func (ls *syslog) Close() error {
+	return ls.inner.Close()
+}
+
+func (ls *syslog) Write(p []byte) (int, error) {
+	return ls.inner.Write(p)
+}