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Message-ID: <4EF31077.8060705@shaddybaddah.name>
Date: Thu, 22 Dec 2011 22:11:51 +1100
From: Shaddy Baddah <lithium-cygwin AT shaddybaddah DOT name>
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To: cygwin AT cygwin DOT com
Subject: Re: [ANNOUNCEMENT] CALL FOR TESTING: Cygwin 1.7.10
References: <announce DOT 20111206093746 DOT GA6222 AT calimero DOT vinschen DOT de> <4EF2D79D DOT 2020809 AT shaddybaddah DOT name> <20111222092552 DOT GA31936 AT calimero DOT vinschen DOT de> <4EF3027A DOT 7090503 AT shaddybaddah DOT name> <20111222104443 DOT GC31936 AT calimero DOT vinschen DOT de>
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Hi Corinna,

On 22/12/11 21:44, Corinna Vinschen wrote:
> On Dec 22 21:12, Shaddy Baddah wrote:
>> On 22/12/11 20:25, Corinna Vinschen wrote:
>>> On Dec 22 18:09, Shaddy Baddah wrote:
>>>> On 06/12/11 20:37, Corinna Vinschen wrote:
>>>>> A lot of changes and fixes have been made in Cygwin since 1.7.9 has
>>>>> been released, so we're looking forward to release Cygwin 1.7.10 soon.
>>>>>
>>>>> Please test the latest developer snapshots at http://cygwin.com/snapshots/
>>>>> which should have "Release Candidate" quality.
>>>>
>>>> I'm having a problem with the most recent snapshot (at time of
>>>> writing), 2011-12-19 17:48:27 UTC. A regular non-privileged (not in
>>>> Administrators) user is unable to execute any commands from within a
>>>> Cygwin process itself.
>>>>
>>>> The following copy/paste from a Command Prompt session should
>>>> illustrate the problem:
>>>>
>>>> c:\Users\Public\portapps\cygwin\bin>ls /var
>>>> cache  empty  games  lib  log  run  tmp
>>>>
>>>> c:\Users\Public\portapps\cygwin\bin>sh -c "/bin/ls /var"
>>>> sh: /bin/ls: Permission denied
>>>>
>>>> c:\Users\Public\portapps\cygwin\bin>id -a
>>>> uid=1007(portapps) gid=513(None) groups=513(None),545(Users)
>>>>
>>>> c:\Users\Public\portapps\cygwin\bin>sh -c "/bin/id -a"
>>>> sh: /bin/id: Permission denied
>>>>
>>>> I am running Windows 7 64bit.
>>>
>>> Works for me.  I tried this with a non-admin domain member account
>>> as well as with a non-admin local SAM account.  Did you check the
>>> actual permissions?
>>>
>>
>> Yes. They all look right to me. Here is what I see for ls for example:
>>
>> c:\Users\Public\portapps\cygwin\bin>ls -l /bin/ls
>> -rwxr-xr-x 1 portapps None 128526 Oct 28 15:00 /bin/ls
>>
>> c:\Users\Public\portapps\cygwin\bin>sh -c "/bin/ls -l /bin/ls"
>> sh: /bin/ls: Permission denied
>> [...]
>> I don't have time right at this moment, but later I maybe able to help
>> with some DLL debugging
>
> Does it really work if you replace the DLL with 1.7.9 again?  If so,
> you could try to find out which snapshot introduced the problem for you.
>
> Also, you could start the whole thing from strace to see what happens:
>
>   CMD> strace -o my.trace sh -c "/bin/id -a"

I've done this with 1.7.10 still in place, once with portapps user
(the failure case), and with my own regular (domain) user. Comparing
the two outputs, there is an obvious ERROR_ACCESS_DENIED error in the
failure case:

   69  126706 [main] sh 3824 build_env: envp 0x61266AB4, envc 47
   37  126743 [main] sh 3824 child_info::child_info: subproc_ready 0x234
  589  127332 [main] sh 3824 seterrno_from_win_error:
/netrel/src/cygwin-snapshot-20111219-1/winsup/cygwin/spawn.cc:692
windows error 5
   59  127391 [main] sh 3824 geterrno_from_win_error: windows error 5 ==
errno 13
   74  127465 [main] sh 3824 child_info_spawn::worker: CreateProcess
failed, Win32 error 5
  196  127661 [main] sh 3824 stat64: entering

Any further hints?

Regards,
Shaddy


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