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Message-ID:	<430F0DDA.9040609@byu.net>
Date:	Fri, 26 Aug 2005 06:40:58 -0600
From:	Eric Blake <ebb9 AT byu DOT net>
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To:	cygwin AT cygwin DOT com
Subject:	Re: Problem with sh/bash and snapshot cygwin1-20050825.dll
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According to Eric Blake on 8/26/2005 6:17 AM:
> I also noticed that realpath("c:..", buf) now returns "c:", rather than
> "/cygdrive" - I guess it comes down to the choice of whether cygwin has 2
> roots or 28 roots.  I prefer 2 roots (so that the parent directory of any
> drive letter is the cygdrive prefix), but maybe I can be convinced that 28
> is okay.  But whatever the choice is, it should be consistent - right now
> realpath("c:/..", buf) is failing with ENOENT, even though it should have
> the same result as realpath("c:..", buf).

Replying to myself, if cygwin is ever changed so that it tracks 27 current
working directories the way Windows does (using the !C: environment
variable and friends), then c:.. and c:/.. would have to have different
semantics.  But currently cygwin is documented as implicitly inserting a
path separator after a drive letter, so that all pathnames from a drive
letter start at the root of the drive.

Also, another argument for cygwin to only have 2 roots instead of 28 is
that realpath() is then consistent with getcwd(), and that way, ALL
fully-resolved absolute paths start with '/'.  In other words, since
chdir("c:");getcwd(buf, PATH_MAX) returns /cygdrive/c, so should
realpath("c:", buf).

As to your comment in path.cc about realpath(path, NULL) malloc'ing its
result being weird, it is consistent with getcwd(NULL, 0) malloc'ing its
result, and it is quite useful.

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
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