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Mail Archives: cygwin/2009/08/11/10:01:43

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Date: Tue, 11 Aug 2009 16:01:19 +0200
Message-ID: <6910a60908110701i67cf934bg841661a92c2ef60@mail.gmail.com>
Subject: Re: Perl bug (was Re: [1.7] cygwin allows writing to readonly files)
From: Reini Urban <rurban AT x-ray DOT at>
To: cygwin AT cygwin DOT com
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2009/8/11 Corinna Vinschen:
> On Aug 11 12:44, Reini Urban wrote:
>> 2009/8/11 Corinna Vinschen:
>> > That might be a good workaround nevertheless. =A0You should just test =
the
>> > list of supplementary groups as well, along these lines:
>>
>> We already have an ingroup() check in this Perl_cando() function, so
>> there is no
>> need to write it again. But it is disabled in perl core for this code pa=
th.
>> See http://perl5.git.perl.org/perl.git/blob/HEAD:/doio.c#l1929
>> It would be:
>> =A0 =A0 if (ingroup(544,effective))
>> =A0 =A0 =A0 return TRUE; =A0 =A0 =A0 =A0 =A0 =A0/* Administrators read a=
nd write anything */
>> but this is simply not true, as under unix. Windows Administrators
>> fall under the same ACL restrictions as normal users. So only using
>> access() is reliable.
>
> I don't understand what you're tryin to say. =A0The members of the Admin
> group have always write access to files due to the SE_BACKUP_NAME
> privilege enabled in Cygwin.

Okay, then the ingroup check should be used.
Thanks.
--=20
Reini Urban
http://phpwiki.org/           http://murbreak.at/

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