Hi...
I have seen similar problems on my side, but could not knock them down
100% reproducable to get a good recipe for debugging it. I got this best
reproduceable if I generate a tar on linux with eg a windows .exe
inside. and than untar it on cygwin. Afterwards ACLs were broken. Not
every time but frequently. When using windows Explorer I got a message
like "Permissions are not sorted in the correct way" (in german) when I
tried to see permissions. And afterwards they have been quite strange
and files where not accessable / executable.
I have it with 3.x up to 3.3.4.
Roland
"Cygwin" <cygwin-bounces+roland.schwingel=onevision...@cygwin.com> wrote
on 07.02.2022 08:01:33:
> From: "Andrey Repin" <anrdae...@yandex.ru>
> To: "Jay K" <jayk...@hotmail.com>, cygwin@cygwin.com
> Date: 07.02.2022 08:05
> Subject: Re: Cygwin making files inaccessible?
> Sent by: "Cygwin"
<cygwin-bounces+roland.schwingel=onevision...@cygwin.com>
>
> Greetings, Jay K!
>
> > I looked at this a while. I tried various recent cygwin1.dlls as
> there were two ACL changes recently.
> > I tried building cygwin1.dll with those changes reverted, but
> failed to build it.
> > For one thing it took me a while to find shilka..it is in cocom,
> but that wasn't the entire problem.
>
> > Eventually.. I noticed the behavior was not the same for every
> > file/directory/volume. Sometimes it worked ok.
> > Though I think the ACLs still get changed quite a bit: "full"
> expands to "many".
> > Of course it has worked plenty for me and everyone else.
>
> > Eventually I tried chmod -R 777 * and this seems to have worked.
>
> > I speculate that some "bad" Cygwin ACLs got created at some point.
> > And maybe cacls wasn't deleting them?? That parts seems wierd.
> Maybe on directories?
> > Possibly due to those two recent changes, or maybe user error, I
don't know.
>
> This may happen outside Cygwin tree, when initial ACL's are set in some
> interesting way.
> One possible solution is to tweak /cygdrive mount point to include
"noacl"
> flag, deferring all ACL modifications to Windows.
>
> (Please bottom post in this list. Thank you.)
>
>
> > From: Jay K
> > Sent: Saturday, February 5, 2022 12:16 PM
> > To: cygwin@cygwin.com <cygwin@cygwin.com>
> > Subject: Cygwin making files inaccessible?
> >
> > Cygwin making files inaccessible?
> > i.e. when Cygwin copies or writes to them, not random files.
>
> > C:\t>dir /s/b/a
>
> > C:\t>dir /q .
>
> > 02/05/2022 04:11 AM <DIR> BUILTIN\Administrators .
> > 02/05/2022 04:11 AM <DIR> NT SERVICE\TrustedInsta..
>
> > C:\t>cacls .
> > C:\t Everyone:(OI)(CI)F
>
> > C:\t>echo > 1.txt
>
> > C:\t>cacls 1.txt
> > C:\t\1.txt Everyone:F
>
> > C:\t>copy 1.txt 2.txt
> > 1 file(s) copied.
>
> > C:\t>cacls 2.txt
> > C:\t\2.txt Everyone:F
>
> > C:\t>del 2.txt
>
> > C:\t>uname -a
> > CYGWIN_NT-10.0-WOW DESKTOP-BCFUMJ4 3.3.4(0.341/5/3) 2022-01-31 19:
> 31 i686 Cygwin
>
> > C:\t>cp 1.txt 2.txt
>
> > C:\t>which cp
> > /usr/bin/cp
>
> > C:\t>cacls 2.txt
> > C:\t\2.txt NULL SID:(DENY)(special access:)
> > READ_CONTROL
>
> > DESKTOP-BCFUMJ4\jay:(DENY)(special access:)
> > FILE_READ_DATA
> > FILE_READ_EA
> > FILE_EXECUTE
>
> > DESKTOP-BCFUMJ4\jay:(special access:)
> > STANDARD_RIGHTS_ALL
> > DELETE
> > READ_CONTROL
> > WRITE_DAC
> > WRITE_OWNER
> > SYNCHRONIZE
> > STANDARD_RIGHTS_REQUIRED
> > FILE_READ_ATTRIBUTES
> > FILE_WRITE_ATTRIBUTES
>
> > DESKTOP-BCFUMJ4\None:R
> > Everyone:R
>
>
> > C:\t>more 1.txt
> > ECHO is on.
>
> > C:\t>more 2.txt
> > Cannot access file C:\t\2.txt
>
> > Same behavior from cygwin64.
>
> > C:\t>\cygwin64\bin\uname -a
> > CYGWIN_NT-10.0 DESKTOP-BCFUMJ4 3.3.3(0.341/5/3) 2021-12-03 16:35
> x86_64 Cygwin
>
> > Huh?
>
> > I would hope Cygwin could/would just copy the ACLs asis.
> > I am guessing there is some failed attempt to translate them
> > to an internal form and then back to NT form.
>
> > My real scenario was open/write/read, not cp.exe.
>
> > - Jay
>
>
>
> --
> With best regards,
> Andrey Repin
> Monday, February 7, 2022 9:59:12
>
> Sorry for my terrible english...
>
> --
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