bug in cygwin_conv_to_posix_path() caused by period in win32 path

[Pavel Kudrna]

Christopher Faylor wrote:
> I suppose it is possible that we'd consider a nicely written, minimally
> intrusive patch to use these but I'm not 100% certain that it is even
> possible to do this cleanly given the way the environment variable/path
> conversion handling works.
>   
Lets look back to original subject. Function cygwin_conv_to_posix_path()
should not leave passed win32 path almost unconverted:

c:.\  ->  c:./
c:.   ->  c:.

That is clearly incorrect.

I found the present meaning of "C:" defined as "C:\" at the beginning
of path.cc file. So both paths should be converted to /cygdrive/c.

But I see it much better to convert it according to the contents "!C:"
environment variable. Even in the present time when these variables are
without changing inherited between cygwin programs.
Pavel Kudrna

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