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| Subject: | Re: crazy default permissions |
| To: | cygwin AT cygwin DOT com |
| References: | <57F48222 DOT 1030605 AT houseofpain DOT org> <3ead440c-089b-f83c-3ebf-9a4c37c09290 AT gmail DOT com> |
| From: | Mitch Deoudes <mitch AT houseofpain DOT org> |
| Message-ID: | <57F48ED8.5080308@houseofpain.org> |
| Date: | Wed, 5 Oct 2016 01:25:44 -0400 |
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On 10/5/2016 12:40 AM, Marco Atzeri wrote:
> On 05/10/2016 06:31, Mitch Deoudes wrote:
>> mkdir has suddenly started creating directories with strange
>> permissions. As far as I can tell, it's related to making directories
>> nested inside other directories that were also created within cygwin.
>> As you create deeper and deeper nestings, the perms get more and more
>> screwed up. It starts at the second level deep, with the setuid flag,
>> and eventually gets to the point where you're making directories that
>> don't even have user read/write.
>>
>> I tried this on a brand new installation of the latest cygwin64, with no
>> modifications, as of just now:
>>
>> mitch AT calculonjr ~/src/etc/rsync
>> $ umask
>> 0022
>>
>> mitch AT calculonjr ~/src/etc/rsync
>> $ mkdir baz
>>
>> mitch AT calculonjr ~/src/etc/rsync
>> $ ls -ld baz
>> drwxrwxr-x+ 1 mitch None 0 Oct 5 00:11 baz <--- first dir looks
>> reasonable (but doesn't match umask)
>>
>> mitch AT calculonjr ~/src/etc/rsync
>> $ mkdir baz/bob
>>
>> mitch AT calculonjr ~/src/etc/rsync
>> $ ls -l baz
>> total 0
>> drwsrwsr-t+ 1 mitch None 0 Oct 5 00:11 bob <--- second dir is weird
>>
>> mitch AT calculonjr ~/src/etc/rsync
>> $ mkdir baz/bob/foo
>>
>> mitch AT calculonjr ~/src/etc/rsync
>> $ ls -l baz/bob/
>> total 0
>> d--Srws--T+ 1 mitch None 0 Oct 5 00:12 foo <--- third dir doesn't
>> even have user read/write
>>
>> mitch AT calculonjr ~/src/etc/rsync
>> $ mkdir baz/bob/foo/blob
>> mkdir: cannot create directory `baz/bob/foo/blob': Permission denied
>>
>>
>> Any guesses what might be causing this? I'm pretty sure this was
>> working as of my last update, which was probably several months ago.
>>
>> mitch
>>
>>
>
> where is your home ?
>
> $ cygpath -u ~
> /home/marco
>
> and what are its ACLS ?
>
> $ cacls $(cygpath -w ~)
> E:\cygwin64\home\marco MATZERI\marco:F
> BUILTIN\Administrators:R
> Everyone:R
> CREATOR OWNER:(OI)(CI)(IO)F
> CREATOR GROUP:(OI)(CI)(IO)R
> Everyone:(OI)(CI)(IO)R
>
>
>
> --
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>
>
Hmm... in checking the acl's on my home dir, I noticed there was an
entry for an unkown user. Probably left over from the last time I
migrated my data to a new windows install. I deleted that entry via the
Windows properties->security tab, which triggered a massive re-write of
all the permissions for everything in my home dir. Now mkdir seems to
work fine.
No idea why that would cause/fix the problem. Especially given the fact
that said data migration happened probably years ago. My home dir acl's
do look a little convoluted compared to yours, though:
Everyone:(special access:)
READ_CONTROL
SYNCHRONIZE
FILE_READ_EA
FILE_READ_ATTRIBUTES
CREATOR OWNER:(OI)(CI)(IO)F
NT AUTHORITY\SYSTEM:(OI)(CI)F
calculonjr\mitch:(OI)(CI)F
BUILTIN\Administrators:(OI)(CI)F
BUILTIN\Users:(special access:)
READ_CONTROL
SYNCHRONIZE
FILE_READ_EA
FILE_READ_ATTRIBUTES
BUILTIN\Users:(CI)(IO)(special access:)
SYNCHRONIZE
FILE_WRITE_DATA
FILE_APPEND_DATA
BUILTIN\Administrators:(ID)F
BUILTIN\Administrators:(OI)(CI)(IO)(ID)F
NT AUTHORITY\SYSTEM:(ID)F
NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(ID)F
NT AUTHORITY\Authenticated Users:(ID)C
NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(ID)C
BUILTIN\Users:(ID)R
BUILTIN\Users:(OI)(CI)(IO)(ID)(special access:)
GENERIC_READ
GENERIC_EXECUTE
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