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Date: Tue, 28 Jun 2022 18:24:42 +0900
From: Takashi Yano <takashi.yano@nifty.ne.jp>
To: cygwin@cygwin.com
Subject: Re: cygpath 3.3.4 : incorrect windows to unix path conversions
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On Tue, 28 Jun 2022 09:44:56 +0200
Timothee Besset wrote:
> We are seeing some odd behavior from cygpath.exe when it is copied and used
> outside the normal cygwin installation directory:
> 
> PS C:\Users\ttimo> C:\cygwin64\bin\cygpath.exe -a -u "C:"
> /cygdrive/c
> 
> After copying cygpath.exe and cygwin1.dll to a blank C:\tmp:
> 
> PS C:\Users\ttimo> C:\tmp\cygpath.exe -a -u "C:"
> /
> 
> (should be /cygdrive/c!)

Both / and /cygdrive/c are correct in this case.
The root directory for cygwin is the parent directory of the
directory where cygwin1.dll is located.

If cygwin1.dll is located in c:\tmp, the root directory for
cygwin is c:\. Therefore, / is correct answer for cygpath -u 'c:\'.

This is the same with the fact that
c:\cygwin64\bin\cygpath.exe -u "c:\cygwin64"
returns / rather than /cygdrive/c/cygwin64.

> After copying those same files to C:\tmp\tmp:
> 
> PS C:\Users\ttimo> C:\tmp\tmp\cygpath.exe -a -u "C:"
> /cygdrive/c

In this case, the root directory for cygwin is c:\tmp.
Therefore, c:\ is outside of the cygwin directories.
So, cygpath -u 'c:\' returns /cygdrive/c.


-- 
Takashi Yano <takashi.yano@nifty.ne.jp>

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