Re: [Python-Dev] cpython (2.7): Fix posixpath.realpath() for multiple pardirs (fixes issue #6975).

2013年2月18日 10:10:46 -0800

On 2013年2月18日 19:56:07 +0200
Serhiy Storchaka <[email protected]> wrote:
> On 18.02.13 19:26, Antoine Pitrou wrote:
> > On 2013年2月18日 11:24:40 +0100 (CET)
> > serhiy.storchaka <[email protected]> wrote:
> >>
> >> + def test_realpath_curdir(self):
> >> + self.assertEqual(realpath('.'), os.getcwd())
> >> + self.assertEqual(realpath('./.'), os.getcwd())
> >> + self.assertEqual(realpath('/'.join(['.'] * 100)), os.getcwd())
> >> +
> >> + def test_realpath_pardir(self):
> >> + self.assertEqual(realpath('..'), dirname(os.getcwd()))
> >> + self.assertEqual(realpath('../..'), dirname(dirname(os.getcwd())))
> >> + self.assertEqual(realpath('/'.join(['..'] * 100)), '/')
> >
> > What if there's a symlink along os.getcwd()?
> 
> 1. AFAIK, os.getcwd() returns the path with resolved symlinks.
Indeed, it seems you are right (under POSIX at least):
"The getcwd() function shall place an absolute pathname of the current
working directory in the array pointed to by buf, and return buf. The
pathname shall contain no components that are dot or dot-dot, or are
symbolic links."
http://pubs.opengroup.org/onlinepubs/9699919799/functions/getcwd.html
Regards
Antoine.
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