correct way of running a sub-process

Daniel Danger Bentley dbentley at stanford.edu
Thu Feb 12 17:54:24 CET 2004


Correct me if I'm wrong, but can't this not catch all the output?  Or is
read in python guaranteed to return all the data that can ever be returned
(unlike the C library function)?

-D
"Thomas Guettler" <guettli at thomas-guettler.de> wrote in message
news:pan.2004.02.12.16.17.48.957440 at thomas-guettler.de...
> def shell_command(cmd):
>     # There mustnot be output to stdout or stderr
>     # otherwise an exception is raised
>
>     p=popen2.Popen4(cmd) # read stdout and stderr
>     output=p.fromchild.read()
>     ret=p.wait()
>     if ret or output:
>         raise("Error in shell_command '%s': ret=%s output='%s'" %(
>             cmd, ret, output))
>
>





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