Popen不等待Sandboxie完成

Question

i have an interesting problem with using Python's subprocess.Popen to run some executable (" a.exe ") to generate an image file, wait() for it with shell=False , and then i will check the filesize of this image file using os.path.getsize .

when i use Popen to directly call a.exe , the file gets generated, and i can successfully retrieve the size of the image file.

however, as i am concerned about the security of this generation, now i use Popen with Sandboxie , which in turns run a.exe within a sandbox. The problem i have is that when i try to use getsize() , the file is said to not exist. However, the image file is generated, perhaps just not at the point of time getsize() is called.

does Popen always wait() for the Sandboxie to complete? from the docs, it seems so but in practise it is not the case. How can i make sure my code waits for Sandboxie to complete before proceeding?

Answer 1

http://www.sandboxie.com/?StartCommandLine

You want /wait

The parameter /wait can be used to run a program, wait for it to finish, and return the exit status from the program:

 "C:\\Program Files\\Sandboxie\\Start.exe" /wait cmd.exe