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Python "os.system" calls using IIS6

Posted on 2009-05-13
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Last Modified: 2013-12-25
I am executing a python script on a web server running Windows 2003, IIS6, and FastCGI.  I have have my web extensions all set up, and most python scripts run just fine from the browser.  It's only when I try to make "os.system" calls that things fail.

I have a script here that runs fine from command line and generates textfile.  When run from a web browser however, this does not work:
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import os
os.system('touch output.txt')
os.system('echo 1 >> output.txt')
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I have seen several others ask this same question all over the web since 2001, but no one ever seems to get a real answer.  Does anyone know why this does not work in IIS?  More importantly, does anyone know how to make this work in IIS?

Thanks.
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Question by:m_mccabe
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cj_1969 earned 2000 total points
ID: 24384004
Chances are if you are running IIS 6 then the code is running using the Network Service account.  My guess is that this account does not have permission to execute the call you are making.

Try creating a new application pool and change the logon ID of the application pool to either Local System or create a local/domain account and grant it appropriate permissions and see if this fixes the problem.
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Author Closing Comment

by:m_mccabe
ID: 31581151
Thanks a ton, cj_1969!  I tried your solution and it worked.  During this process, it also got me thinking about permissions, and in the end I only needed to grant the IUSR_%computername% account access to python.exe and cmd.exe.

Thanks so much for getting me on the right track.
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