1 files changed, 24 insertions, 0 deletions
diff --git a/src/validators/sysctl b/src/validators/sysctl
new file mode 100755
index 000000000..9b5bba3e1
--- /dev/null
+++ b/src/validators/sysctl
@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# Copyright (C) 2021 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/>.
+
+declare -a array
+eval "array=($(/sbin/sysctl -N -a))"
+
+if [[ ! " ${array[@]} " =~ " $1 " ]]; then
+    # passed sysctl option is invalid
+    exit 1
+fi
+exit 0