[issue16353] add function to os module for getting path to default shell

[Matt Frank]

Matt Frank added the comment:

In msg174930 Christian Heimes (christian.heimes) wrote:
> I've tested confstr("CS_PATH") on Linux, Mac OS X, Solaris, HP-UX
> and BSD. It works and the path to `sh` is always included.

In msg230713 Ned Deily(ned.deily) wrote:
> ignore Lib/macpath.py.
> [...]
> OS X uses Lib/posixpath.py.

These two messages have convinced me that the correct approach is to kick the can down the road.  I will file a new issue and patch to fix os.defpath (by initializing os.defpath by calling confstr("CS_PATH")).  Then I will file a new issue and patch that will define a reasonable os.confstr() for platforms where HAVE_CONFSTR is not defined.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16353>
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