T7363: add check for config mode that is independent from Cstore

The environment variable _OFR_CONFIGURE is used by bash completion to
setup the config mode environment. We check this setting to coordinate
vyconf config mode and CLI config mode, independent of the legacy
backend Cstore check.

1 files changed, 25 insertions, 0 deletions

diff --git a/python/vyos/utils/session.py b/python/vyos/utils/session.py
new file mode 100644
index 000000000..28559dc59
--- /dev/null
+++ b/python/vyos/utils/session.py
@@ -0,0 +1,25 @@
+# Copyright 2025 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+# pylint: disable=import-outside-toplevel
+
+
+def in_config_session():
+    """Vyatta bash completion uses the following environment variable for
+    indication of the config mode environment, independent of legacy backend
+    initialization of Cstore"""
+    from os import environ
+
+    return '_OFR_CONFIGURE' in environ