On Tuesday 22 May 2007 23:54, Fajar Priyanto wrote:
> Hi all,
> Most of the time I administer Redhat server. However, recently I spend more
> and more time exploring Opensuse.
>
> There's one thing that I don't get it yet regarding sgid and umask in
> Opensuse.
>
> In RH, when I create a directory say 'test', chmod it 3770. It will look
> like this:
> drwxrws--T 2 root sales 4096 2007-05-23 08:16 test
> Then, when I create a file inside the directory, it will have permission
> like this:
> -rw-rw-r-- 1 geecko sales 4 2007-05-23 09:14 filegeecko (notice the
> rw-rw-r--).
>
> I do the same in Opensuse. But, the file created in the directory have the
> permission:
> -rw-r--r-- 1 geecko sales 4 2007-05-23 09:17 filegeecko (notice the
> rw-r--r--). This permission makes other user in sales group cannot edit
> geecko's file. User geecko has to specifically set the permission to 664 on
> the file.
>
> How do I achive the default umask inhereted from the parent directory? I
> read some suggestions from google to adjust the global default umask, but I
> think it's a bit risky, or is it the only way?
>
> Thank you very much.
Hello Fajar,
This is because the default umask for normal users in RH is 002 which is key
to what they call the User Private Group Scheme. The default umask for
normal users in opensuse seems to be 022 -- at least on my system.
Check the /etc/bashrc file on the RH Server. In this file we have the
following "if" construct:
if [ "`id -gn`" = "`id -un`" -a `id -u` -gt 99 ]; then
umask 002
else
umask 022
fi
This little test is what causes the umask thing in RH servers. This says that
if the effective group name is equal to the username and the users effective
id is greater than 99 then set the umask to 002. Otherwise set the umask to
022.
Hope this helps,
Phil
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