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| Message-id: | <536810AD.4020100@cygwin.com> |
| Date: | Mon, 05 May 2014 18:29:01 -0400 |
| From: | "Larry Hall (Cygwin)" <reply-to-list-only-lh AT cygwin DOT com> |
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| To: | cygwin AT cygwin DOT com |
| Subject: | Re: Problem with "None" Group on Non-Domain Members |
| References: | <536796E4 DOT 2090009 AT breisch DOT org> <20140505135928 DOT GK30918 AT calimero DOT vinschen DOT de> <53679D5C DOT 5030209 AT breisch DOT org> <20140505144745 DOT GA6993 AT calimero DOT vinschen DOT de> <5367ACED DOT 40409 AT breisch DOT org> <20140505154230 DOT GB7694 AT calimero DOT vinschen DOT de> <5367B990 DOT 8050907 AT breisch DOT org> <20140505165723 DOT GM30918 AT calimero DOT vinschen DOT de> <5367DEE5 DOT 5010407 AT breisch DOT org> <5367EA1F DOT 3060800 AT cygwin DOT com> <5368094E DOT 7040806 AT breisch DOT org> <53680B9F DOT 3010906 AT breisch DOT org> |
| In-reply-to: | <53680B9F.3010906@breisch.org> |
On 05/05/2014 06:07 PM, Chris J. Breisch wrote: > Chris J. Breisch wrote: >> Larry Hall (Cygwin) wrote: >>> On 05/05/2014 02:56 PM, Chris J. Breisch wrote: >>>> Corinna Vinschen wrote: >>>>> On May 5 12:17, Chris J. Breisch wrote: >>>>>> Corinna Vinschen wrote: >>>>>>> An strace of `chmod 400 bar' might sched some light on this issue, >>>>>>> but I >>>>>>> have a gut feeling the underlying WIndows call will not even >>>>>>> return an >>>>>>> error code... >>>>>> Attached. Your gut seems to be working today... >>>>> >>>>> There *is* something weird here. Look at this: >>>>> >>>>>> 151 36702 [main] chmod 5536 alloc_sd: uid 1001, gid 513, attribute >>>>>> 0x2190 >>>>>> 65 36767 [main] chmod 5536 cygsid::debug_print: alloc_sd: owner SID >>>>>> = S-1-5-21-3514886939-1786686319-3519756147-1001 (+) >>>>>> 70 36837 [main] chmod 5536 cygsid::debug_print: alloc_sd: group SID >>>>>> = S-1-5-21-3514886939-1786686319-3519756147-1001 (+) >>>>> >>>>> alloc_sd (the underlying function creating a security descriptor) gets >>>>> a uid 1001 and gid 513 as input, as usual. But the owner *and* group >>>>> SIDs of the file's existing security descriptor is >>>>> S-1-5-21-3514886939-1786686319-3519756147-1001, the SID of your user >>>>> account. >>>>> >>>>> Why is your user account the primary group of the file, even though >>>>> your user token definitely has "None" (513) as its primary group? >>>>> How did it get there? >>>>> >>>> I don't have a clue. You're the expert. :) >>>> >>> >>> I'm wondering if we're getting the user id as the group for the MS >>> Account because there is no group id. Chris, what does 'id' for >>> each of these accounts look like and is the group id (assuming they >>> are different that the user id) in there? >>> >>> >> >> Well, I hope I'm not comparing apples and oranges, because now I'm at >> home. However, I have duplicated the scenario and results on this >> machine. It was actually where I noticed it first. >> >> id produces expected results: >> >> MS account: >> $ id >> uid=1001(Chris) gid=513(None) groups=513(None),545(Users),1003(HomeUsers) >> >> Local account: >> $ id >> uid=1007(cjb) gid=513(None) groups=513(None),545(Users),1003(HomeUsers) >> >> Actually, it's not quite what I expected. Chris is in the Administrators >> group, and that's not shown. >> >> $ net user Chris >> User name Chris >> Full Name Chris Breisch >> Comment >> User's comment >> Country/region code 001 (United States) >> Account active Yes >> Account expires Never >> >> [snip PW stuff for Cygwin filter] >> >> Workstations allowed All >> Logon script >> User profile >> Home directory >> Last logon 5/1/2014 8:39:44 PM >> >> Logon hours allowed All >> >> Local Group Memberships *Administrators *HomeUsers >> *Users >> Global Group memberships *None >> The command completed successfully. >> >> $ net user cjb >> User name cjb >> Full Name cjb >> Comment >> User's comment >> Country/region code 000 (System Default) >> Account active Yes >> Account expires Never >> >> [snip] >> >> Workstations allowed All >> Logon script >> User profile >> Home directory >> Last logon 5/5/2014 5:40:39 PM >> >> Logon hours allowed All >> >> Local Group Memberships *HomeUsers *Users >> Global Group memberships *None >> The command completed successfully. >> >> > Hmmm, just noticed something in /etc/group: > > Chris J. Breisch:S-1-5-21-3514886939-1786686319-3519756147-1001:11001: > > and on another machine where I can reproduce this: > Chris:S-1-5-21-1055441198-2882714470-4103286779-1001:11001: > > Oddly, mkgroup -l does not produce this line on either machine, so I'm not > sure where it came from. In both cases, the SID for the group is the same as > the my user's SID. Is 513/None in the /etc/group file too or is it missing? -- Larry _____________________________________________________________________ A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting annoying in email? -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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