Date: Thu, 31 May 2007 19:40:31 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Patrick Dung <patrick_dkt@yahoo.com.hk> Cc: freebsd-questions@freebsd.org Subject: Re: Question about the difference of with and without SGID on directory Message-ID: <465F169F.8090501@infracaninophile.co.uk> In-Reply-To: <200241.77528.qm@web54307.mail.re2.yahoo.com> References: <200241.77528.qm@web54307.mail.re2.yahoo.com>
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Patrick Dung wrote:
> Hi
>
> I found Free/Net/OpenBSD semantic is different from Linux/Solaris.
>
> Suppose there is a directory called 'directory,
> With owner www, and group www and permission 0777.
>
> Then I touch a file:
> $ touch file
> $ ls -la
> total 4
> drwxrwxrwx 2 www www 512 May 31 17:14 .
> drwxrwxrwt 8 root wheel 512 May 31 17:14 ..
> -rw-r--r-- 1 patrick www 0 May 31 17:14 file
> ^^^
> The file created will have a group owner of the owner of the directory
> not the creator.
>
> So I have two questions here:
> 1. So is there a difference with SGID on directory?
No. BSDish behaviour of a directory with either mode drwxr-xr-x
or drwxr-sr-x is essentially identical to SysV/Linux-ish behaviour
with a directory mode drwxr-sr-x
> 2. Any idea about why it is different from SYSV (Linux/Solaris)?
It's historic. BSD has always worked that way and SysV has begged
to differ.
Cheers,
Matthew
- --
Dr Matthew J Seaman MA, D.Phil. Flat 3
7 Priory Courtyard
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
Kent, CT11 9PW, UK
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