[BUG 1.7] Read-only files are not.
David Rothenberger
daveroth@acm.org
Thu Jan 1 00:57:00 GMT 2009
On 12/31/2008 4:06 PM, Eric Blake wrote:
> David Rothenberger <daveroth <at> acm.org> writes:
>
>> It seems that read-only files in Cygwin 1.7 are not truly
>> read-only.
>
> Are you perchance running as an Administrator, and therefore you have backup
> privileges?
Yes.
> If so, then you have root-like power, and cygwin exposes that by
> opening files with intent to backup even when the ACLs would otherwise make the
> file unreadable. Therefore, even though none of S_IRUSR, S_IRGRP, S_IROTH are
> set in the posixy st_mode bits, access(file, R_OK) returns 0 and open() is able
> to exploit your root-like powers to read that file.
>
> I thought Corinna mentioned this in the release notes.
I didn't see anything mentioned in this message:
http://cygwin.com/ml/cygwin-announce/2008-12/msg00009.html
>> (This issue was brought to my attention by a failing subversion test
>> after building for 1.7.)
>
> The findutils testsuite also had to make accomodations to skip certain tests
> when run with root-like privileges.
If this is indeed intended behavior, I will adjust the subversion test
cases accordingly.
--
David Rothenberger ---- daveroth@acm.org
pain, n.:
One thing, at least it proves that you're alive!
--
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Problem reports: http://cygwin.com/problems.html
Documentation: http://cygwin.com/docs.html
FAQ: http://cygwin.com/faq/
More information about the Cygwin
mailing list