Re: Question about the difference of with and without SGID on directory

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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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