Добавлена переменная определяющия ro или rw корневая ФС

pym/calculate/lib/variables/system.py

@@ -18,6 +18,7 @@ import os
 from os import path, R_OK
 import platform
 import re
+import errno
 from calculate.lib.utils.dracut import Dracut
 from calculate.lib.datavars import Variable, ReadonlyVariable
 from calculate.lib.utils.files import (readFile, process, listDirectory,
@@ -344,3 +345,20 @@ class VariableOsSubsystem(Variable):
 
     def get(self):
         return SystemType.detect()
+
+
+class VariableClRootReadonly(ReadonlyVariable):
+    """
+    """
+    type = "bool"
+
+    def get(self):
+        check_fn = '/var/tmp/.calculate-rw-check-%d' % os.getpid()
+        try:
+            with open(check_fn,'w') as f:
+                pass
+            os.unlink(check_fn)
+        except (IOError,OSError) as e:
+            if e.errno == errno.EROFS:
+                return "on"
+        return "off"