Unable to write to the directory root on cRIO

I need to create a folder in the root directory of my cRIO but when I try to do it via the web interface (Silverlight) it gives me an error 403 (refused).  I can create and edit files and directories in existing files located in the root directory.

The seller has managed to create a new folder in the directory root on our previous cRIO, but now we are trying to set up another one on our own.  They told me that they don't have to do something special that they do not forget to create this folder.

Any ideas as to why I wouldn't be able to do this, even if I have all permissions on the device?

It's confusing, but "all permissions" web interface are only "all permissions for the web server has permissions for things", that's not all. See http://digital.ni.com/public.nsf/allkb/4EBE45E8A816B19386257B6C0071D025 - more precisely:

Write access

(ETS, VxWorks) Your target provides write access to its folders and files.

(OR Linux in real time) If you want to modify or create new folders and files on your target, you can only do in the following directories:

  • /home/webserv

  • /home/lvuser

  • /tmp

Note: Your target deletes the content in the temporary folder /tmp on target restarts.

Restricting access to the root directory makes the system more robust (prevents the change of important system files).

Tags: NI Hardware

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