find_on_path on systems with tight permissions

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Issue #9 resolved
Hanno Schlichting created an issue

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I'm using setuptools on a server with tight permissions; a normal user is not allowed to list the contents of certain directories, including /usr/bin, which setuptools tries to scan when searching for .egg files. Thus, running any command installed from setuptools fails with

OSError: [Errno 13] Permission denied: '/usr/bin'

The following change in find_on_path(), in, makes it ignore directories which it cannot read:

-if os.path.isdir(path_item): +if os.path.isdir(path_item) and os.access(path_item, os.R_OK):

Do you think this could be applied?

Thanks, Andre

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