[mod_python] Bug?

Gregory (Grisha) Trubetskoy grisha at modpython.org
Fri Jun 11 19:00:03 EDT 2004

Changing current working directory is not thread-safe because if thread A
assumes that the cwd is /x and thread B changes it to /y then thread A
will be in trouble. So calling chdir() in a multithreaded program is a

All mutlithreaded programs do not relay on current working directories for
anything. Apache can't use the DocumentRoot because there can be more than
one DocumentRoot in a single httpd process.



On Tue, 8 Jun 2004, Jon-Pierre Gentil wrote:

> Hash: SHA1
> Gregory Bond wrote:
> >>I am curious...why is os.curdir() /?
> >
> >
> > Because a threaded apache might have several mod_python apps running
> > concurrently and they can't all have their own CWD!
> I don't really see why threading makes a difference for the CWD.  A
> thread doesn't care any more than a fork about the CWD.
> > And there is not necessarily a 1-1 relationship between URLs and
> directories.
> No, but there IS a known DocumentRoot at the time of execution.  I was
> curious as to why the CWD was set to / instead of DocumentRoot.  I'm
> currently doing this for each and every function:
> os.chdir(req.document_root()).  A bit annoying to have to copy the code
> over and over again.  I was just wondering if it could be a part of the
> publisher code, mayhaps with a new PythonOption flag to keep backwards
> compatability.
> - --
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