Ben,
Python on UEFI does not support popen() nor the subprocess or threading
modules. The low-level support for that is not there.
Also, Python (by design) sends all interactive prompts and error messages to
stderr.
On many platforms, the UEFI console's stderr stream is disabled. Under
Nt32Pkg, it is disabled and cannot be enabled.
In setup, under console options, you should be able to enable stderr to the
console, serial, or both. If you do that then you will be able to see the
missing output.
Cheers,
Daryl McDaniel
"If you want to kill any idea in the world, get a committee working on it"
-- Charles Kettering
From: Ben Schroeder [mailto:[email protected]]
Sent: Wednesday, March 26, 2014 2:41 AM
To: [email protected]
Subject: [edk2] python on efi
Hi all,
I have been trying to work with python on the EFI Shell 2.30.
I followed instructions from AppPkg/Applications/Python/PythonReadMe.txt for
setting up the environment.
I have been unable to use popen() function.
Neither os.popen() nor subprocess.open() seem to work.
Furthermore, I do not see any error messages when I work through the command
line python on the EFI Shell, like I would on my local linux system.
So it's hard to locate errors.
I have had success with os.system() command for executing shell commands, but
os.popen() does not seem to work.
My goal is to redirect output into a variable so I can parse it.
Thanks,
Ben S.
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