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Subject: Re: Looking for explanation
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From: Bob McGowan via Cygwin <cygwin AT cygwin DOT com>
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On 7/17/20 3:33 PM, Robert McBroom wrote:
> On 7/17/20 12:27 PM, Eliot Moss wrote:
>> On 7/17/2020 12:16 PM, Robert McBroom wrote:
>> > Directory listing shows a number of new features that I don't 
>> remember being introduced.?? I see
>> > s,t,+ etc. other than the expected wxr. Where would I look for an 
>> explanation?
>>
>> Dear Robert:
>>
>> s and t are usual from Posix and Cygwin tries to come as close to 
>> Posix as it can under Windows.?? s is for setuid/setgid and t is the 
>> "sticky" bit.?? The + indicates that there
>> are more refined access modes present.
>>
>> You might want to read up on ls, chmod, getfacl, etc.
>>
>> What _can_ get funky and confusing is the mapping from Windows ACLs to 
>> what Cygwin
>> reports and Cygwin's manipulation of ACLs.?? There is online Cygwin 
>> documentation about that as well.
>>
>> None of this is new.?? Maybe something changed the file permissions, 
>> and now they show up this way for you??? Not sure what your real 
>> question is ...
>>
> UNIX use predates posix. Don't see any of these designations on Fedora 
> even on ntfs file systems. Haven't dived into them because my objective 
> is to run scientific calculations, but curiosity got the better of me.
> 
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Actually, the 's' and 't' designators predate POSIX.

I have an old Bell Laboratories "UNIX programmer's manual", copyright 
1983, 1979 (for UNIX 7th Edition), and it mentions both the 's' and 't' 
in the 'ls' man page.

Bob
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