T6489: add abstraction vyos.utils.configfs to work natively with the config filesystem

(cherry picked from commit d7a18a3da949bfa3df89661cc0871e8f23b18a10)

2 files changed, 38 insertions, 0 deletions

diff --git a/python/vyos/utils/__init__.py b/python/vyos/utils/__init__.py
index 1cd062a11..90620071b 100644
--- a/python/vyos/utils/__init__.py
+++ b/python/vyos/utils/__init__.py
@@ -17,6 +17,7 @@ from vyos.utils import assertion
 from vyos.utils import auth
 from vyos.utils import boot
 from vyos.utils import commit
+from vyos.utils import configfs
 from vyos.utils import convert
 from vyos.utils import cpu
 from vyos.utils import dict
diff --git a/python/vyos/utils/configfs.py b/python/vyos/utils/configfs.py
new file mode 100644
index 000000000..8617f0129
--- /dev/null
+++ b/python/vyos/utils/configfs.py
@@ -0,0 +1,37 @@
+# Copyright 2024 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/>.
+
+import os
+
+def delete_cli_node(cli_path: list):
+    from shutil import rmtree
+    for config_dir in ['VYATTA_TEMP_CONFIG_DIR', 'VYATTA_CHANGES_ONLY_DIR']:
+        tmp = os.path.join(os.environ[config_dir], '/'.join(cli_path))
+        # delete CLI node
+        if os.path.exists(tmp):
+            rmtree(tmp)
+
+def add_cli_node(cli_path: list, value: str=None):
+    from vyos.utils.auth import get_current_user
+    from vyos.utils.file import write_file
+
+    current_user = get_current_user()
+    for config_dir in ['VYATTA_TEMP_CONFIG_DIR', 'VYATTA_CHANGES_ONLY_DIR']:
+        # store new value
+        tmp = os.path.join(os.environ[config_dir], '/'.join(cli_path))
+        write_file(f'{tmp}/node.val', value, user=current_user, group='vyattacfg', mode=0o664)
+        # mark CLI node as modified
+        if config_dir == 'VYATTA_CHANGES_ONLY_DIR':
+            write_file(f'{tmp}/.modified', '', user=current_user, group='vyattacfg', mode=0o664)