virtualbox.org

Host: Windows 10 (64)
Guest: Ubuntu 18.04 (64)
Version: 5.2.20
Guest Additions: 5.2.20

Using python, I'm trying to execute a bash script in my Ubuntu guest However, it fails at While it does print Permissions changed, the permissions do not actually change for the file, and thus raises

(-2147352567, 'Exception occurred.', (0, 'GuestProcessWrap', 'VERR_ACCESS_DENIED', None, 0, -2135228411), None)

I manually changed the permissions of the file, and ran again after commenting out lines 40-43. This time, no exceptions occurred and the code exit cleanly, however, the script did not get executed either, as evident from the absence of test.txt.

Also, and I think this is a bug, I had to comment out lines 53-56 from because fileExists() does not return False (as it should) if the file does not exist, and instead raises

(-2147352567, 'Exception occurred.', (0, 'GuestSessionWrap', 'No such file or directory on guest', None, 0, -2135228411), None)

Update: The same programs works for Ubuntu host and Windows guest, though with some platform changes (replace shell script with batch script, commenting out permission management lines 44-48).

Terminate for the process flag may or may not work, depending on the host & guest. Also, you do not check for guest additions capabilities and will most likely trigger failures as the timing might not be right.
See the code sample for the high-level steps. Adapt to your version.

noteirak wrote:you do not check for guest additions capabilities and will most likely trigger failures as the timing might not be right.

I checked for AdditionsRunLevelType_Userland. Is that not enough? If so, please point me to the right sample, as there are many on that link, and I'm just starting out on this.

The one labeled "Run Guest Process and Read Stdout" is what you are after.