unbuffered-output

I'm writing a Python program for running user-uploaded arbitrary (and thus, at the worst case, unsafe, erroneous and crashing) code on a Linux server. The security questions aside, my objective is to determine, if the code (that might be in any language, compiled or interpreted) writes the correct things to stdout , stderr and other files on given input fed into the program's stdin . After this, I need to display the results to the user. The current solution Currently, my solution is to spawn the child process using subprocess.Popen(...) with file handles for the stdout , stderr and stdin .

Hi according to this post , unbuffer connects to a command via a pseudo-terminal (pty), which makes the system treat it as an interactive process, therefore not using any stdout buffering. I would like to use this function on Windows. May I know what is the equivalent of unbuffer program on Windows? Thanks. The behaviour you're describing is typical of applications using run-time libraries for I/O. By default, most runtime libraries check to see whether the handle is a character mode device such as a console, and if so, they don't do any buffering. (Ideally the run-time library would treat a

I've got a script like: #!/bin/bash exec /usr/bin/some_binary > /tmp/my.log 2>&1 Problem is that some_binary sends all of its logging to stdout, and buffering makes it so that I only see output in chunks of a few lines. This is annoying when something gets stuck and I need to see what the last line says. Is there any way to make stdout unbuffered before I do the exec that will affect some_binary so it has more useful logging? (The wrapper script is only setting a few environment variables before the exec, so a solution in perl or python would also be feasible.) You might find that the unbuffer