[Emacs-bug-tracker] bug#5826: marked as done ([feature] chmod +S to setgid directories alike +X)

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Your message dated Sat, 3 Apr 2010 13:57:59 -0600
with message-id <address@hidden>
and subject line Re: bug#5826: [feature] chmod +S to setgid directories alike +X
has caused the GNU bug report #5826,
regarding [feature] chmod +S to setgid directories alike +X
to be marked as done.

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-- 
5826: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=5826
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> --- Begin Message ---
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> Subject: 
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> [feature] chmod +S to setgid directories alike +X
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> Date: 
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> Sat, 3 Apr 2010 13:04:25 +0200
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> Hello,
>
> I would really appreciate if chmod supported setting setgid permissions
> on directories (and files already having such) recursively, much like
> '+X' does set executable permission. To match the '+X' one, I suggest
> using '+S' for that.
>
> -- 
> Best regards,
> Michał Górny
>
> <http://mgorny.alt.pl>
> <xmpp:address@hidden>
>
>
>
>
> --- End Message ---
> --- Begin Message ---
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>
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> Subject: 
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> Re: bug#5826: [feature] chmod +S to setgid directories alike +X
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>
>
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> Date: 
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> Sat, 3 Apr 2010 13:57:59 -0600
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>
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> User-agent: 
>
> Mutt/1.5.18 (2008-05-17)
>
>
>
>
> Michał Górny wrote:
> > I would really appreciate if chmod supported setting setgid permissions
> > on directories (and files already having such) recursively, much like
> > '+X' does set executable permission. To match the '+X' one, I suggest
> > using '+S' for that.
>
> I suggest using 'find' for this.  And there is an advantage to using a
> standard command.  It works anywhere.
>
>   $ find . -type d -exec chmod g+s {} +
>
> Also the setgid bit isn't like the execute bit.  They can't be directly
> compared.  There are three execute bits.  The +X implements a not
> completely trivial control flow.  If the file is a directory OR if the
> file already had the user execute bit or the group execute bit or the
> other execute bit set.  It is the three execute bits that makes it
> non-trivial and the usefulness of the +X mode.  But by contrast
> setting the setgid bit is very simple.  Just set it.  It is only one
> bit.
>
> Plus there are security ramifications to think about when setting the
> setgid bit on files.  And the decisions are operating system
> dependent.  On most systems scripts should never be suid/sgid.  And
> even on systems where it is safe to do so I don't think setting the
> suid/sgid bit on normal executables is something that should be done
> lightly.
>
> Bob
>
>
> --- End Message ---