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From: Eric Blake <ebb9 AT byu DOT net>
Subject:  Re: [1.7] chmod fails with windows path
Date: Mon, 15 Dec 2008 20:44:38 +0000 (UTC)
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Eric Blake <ebb9 <at> byu.net> writes:

> 
> Eric Blake <ebb9 <at> byu.net> writes:
> 
> > Or, more accurately, a limitation of the coreutils .exe magic getting
> > thrown off by the switch to the new cygwin_conv_path.
> 
> On further thought, chmod doesn't do .exe magic to begin with (cp, mv, and ln 
> do, but not chmod).  Maybe the culprit is the fact that coreutils uses 
fchmodat 
> rather than chmod?

Yep.  I stepped through chmod(1) in the debugger, and this call failed:

fchmodat(AT_FDCWD, "c:/blah", 0755, 0);

even though I previously created "/cygdrive/c/blah".

It looks like gen_full_path_at is to blame; it is not recognizing DOS-style 
absolute paths; it tries to construct {cygheap->cwd.posix}"/c:/blah" rather 
than "c:/blah", and since "./c:" is not a directory, you get the failure.

Which means I don't have to change anything in coreutils, but cygwin1.dll does 
need a refresh.

-- 
Eric Blake



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