use unipath

requirements.txt

@@ -1,2 +1,3 @@
 pycryptodome
 pydh
+unipath

server/executor.py

@@ -3,6 +3,8 @@
 import os
 import re
 
+from unipath import Path
+
 class Executor:
     """This class executes commands recieved by the server"""
 
@@ -34,16 +36,14 @@ class Executor:
 
     def setCurrentDirectory(self, dirName: str) -> str:
         if dirName == "..":
-            if self.currentDirectory == "":
+            p = Path(os.path.join(self.baseDir, self.currentDirectory))
+            parentpath = p.parent
+            if str(parentpath) == self.baseDir:
                 return self.currentDirectory
             else:
-                directories = self.currentDirectory.split(os.path.sep)
-                strdirectory = ""
-                for dir in directories:
-                    strdirectory = os.path.join(strdirectory, dir)
-                    strdirectory = strdirectory[:-3]
-                if os.path.exists(os.path.join(self.baseDir, self.currentDirectory)):
-                    self.currentDirectory = strdirectory
+                newpath = str(parentpath).replace(self.baseDir,'')
+                if os.path.exists(os.path.join(self.baseDir,newpath)):
+                    self.currentDirectory = newpath
                 return self.currentDirectory
         else:
             dirName = self.sanitizeDirectory(dirName)