Initial commit

[ta/config-manager.git] / cmframework / src / cmframework / utils / cmflagfile.py

diff --git a/cmframework/src/cmframework/utils/cmflagfile.py b/cmframework/src/cmframework/utils/cmflagfile.py
new file mode 100644 (file)
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--- /dev/null
+++ b/cmframework/src/cmframework/utils/cmflagfile.py
@@ -0,0 +1,59 @@
+# Copyright 2019 Nokia
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+from __future__ import print_function
+import logging
+import os.path
+import os
+import stat
+
+from cmframework.apis import cmerror
+
+
+class CMFlagFile(object):
+    CM_FLAGFILE_DIR = '/mnt/config-manager'
+
+    def __init__(self, name):
+        logging.debug('CMFlagFile constructor called, name=%s', name)
+
+        self._name = '{}/{}'.format(CMFlagFile.CM_FLAGFILE_DIR, name)
+
+    def __nonzero__(self):
+        return self.is_set()
+
+    def is_set(self):
+        logging.debug('is_set called')
+
+        return os.path.exists(self._name)
+
+    def set(self):
+        logging.debug('set called')
+
+        if not self.is_set():
+            try:
+                with open(self._name, 'w') as f:
+                    os.chmod(self._name, stat.S_IRUSR | stat.S_IWUSR)
+                    f.write('')
+                    f.flush()
+                    os.fsync(f.fileno())
+            except IOError as exp:
+                raise cmerror.CMError(str(exp))
+
+    def unset(self):
+        logging.debug('unset called')
+
+        if self.is_set():
+            try:
+                os.remove(self._name)
+            except IOError as exp:
+                raise cmerror.CMError(str(exp))