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Re: Hook scripts run with empty environment

From: Faheem Mitha <faheem_at_email.unc.edu>
Date: 2005-01-16 06:31:33 CET

On Wed, 22 Dec 2004 14:22:45 -0500, Greg Hudson <ghudson@MIT.EDU> wrote:
> On Wed, 2004-12-22 at 14:15, Justin Erenkrantz wrote:
>> Yes, it does. httpd always resets the environment for CGI scripts except for
>> a very small subset of environment variables. Most notably, PATH is retained:
>> see ap_add_common_vars in util_script.c. And, even then the #1 complaint we
>> always get with respect to CGI scripts is that the PATH differs from user to
>> user depending upon who starts it. (This causes chaos when you use sudo, etc.)
> Interesting. (That's one of the motivations of djb's daemontool's
> package, incidentally, but insisting on starting everything from init is
> probably overkill.)
> I still feel that it's pretty bogus in the case of file:// and
> svn+ssh://. Not sure how to differentiate between those cases, though.

I just ran into this problem (in the context of file:// and

It took me a while to track down because I am so used to taking for
granted that shell scripts inherit environmental variables.

If you are not planning to change this, I suggest you put suitable
warnings in the template files in the hook subdirectory of the
repository. Most people look at these before creating their own hook


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Received on Sun Jan 16 06:33:23 2005

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