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Date: Fri, 31 Aug 2018 15:34:17 -0700 (PDT)
From: Steven Penny <svnpenn AT gmail DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: error in "cygpath" behavior
References: <20180831085734 DOT GF6350 AT calimero DOT vinschen DOT de>
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On Fri, 31 Aug 2018 10:57:34, Corinna Vinschen wrote:
> Long-standing behaviour.  ".." in Cygwin and ".." in Windows can totally
> disagree.  The path is always convert to absolute at this point in favor
> of correct output.  There's also the additional restriction (though
> not in this case) that relative Windows paths must not be longer than
> MAX_PATH (260) chars.
>
> I'm certainly open to patches to the underlying cygwin_conv_path
> function to change the Windows path to relative if possible.

I am not understanding - it appears that "dot-dot" (..) is well defined by
POSIX:

> The special filename dot-dot shall refer to the parent directory of its
> predecessor directory. As a special case, in the root directory, dot-dot may
> refer to the root directory itself.

http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_13

so it would appears that ".." would be an acceptable return value in any case.


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