From 3cb7062664e8e108cb574159f56f87c6eff0a969 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Tue, 28 Apr 2020 17:45:17 +0200
Subject: syslog: T2131: add generic fqdn validator

---
 src/validators/fqdn | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100755 src/validators/fqdn

(limited to 'src/validators/fqdn')

diff --git a/src/validators/fqdn b/src/validators/fqdn
new file mode 100755
index 000000000..9f4ed764f
--- /dev/null
+++ b/src/validators/fqdn
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# 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.  If not, see <http://www.gnu.org/licenses/>.
+
+from re import match
+from sys import argv,exit
+
+if len(argv) == 2:
+  # pattern copied from: https://www.regextester.com/103452
+  pattern = "(?=^.{4,253}$)(^((?!-)[a-zA-Z0-9-]{0,62}[a-zA-Z0-9]\.)+[a-zA-Z]{2,63}$)"
+  if match(pattern, argv[1]):
+    exit(0)
+  else:
+    exit(1)
+
-- 
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