sub shell implementation

[zix]

Hi Everybody,
this is in related to this thread: somehow i decided it has grown
enough, so thought of starting a new one...
http://groups.google.co.in/group/comp.os.linux.development.apps/browse_thread/thread/ec0248992b354ed6/c5f9da3df5d91a2b?hl=en#c5f9da3df5d91a2b

Anyways, the point is that I have to implement a shell(same as
newgrp). But just wondering, how is that feasble.

as for example, I have command df which has to be executed from new
group. if I have the new group ready, how do i set the df command to
be executed by users of that group? I mean imagine if my group id is
140, what do i set in df so that only users after entering the group
(gid 140) will be able to execute?

I have to have all these automated, as all these are supposed to be in
rootfilesystem and not in PC's. I am planning to write all scripts to
automate when my target boots up and runs.

Thanks for all the help,
zix

[Joe Beanfish]

zix wrote:
> Hi Everybody,
> this is in related to this thread: somehow i decided it has grown
> enough, so thought of starting a new one...
> http://groups.google.co.in/group/comp.os.linux.development.apps/browse_thread/thread/ec0248992b354ed6/c5f9da3df5d91a2b?hl=en#c5f9da3df5d91a2b
>
> Anyways, the point is that I have to implement a shell(same as
> newgrp). But just wondering, how is that feasble.

newgrp doesn't implement a shell. It just changes group then
runs a standard shell.

> as for example, I have command df which has to be executed from new
> group. if I have the new group ready, how do i set the df command to
> be executed by users of that group? I mean imagine if my group id is
> 140, what do i set in df so that only users after entering the group
> (gid 140) will be able to execute?

chgrp 140 /bin/df
chmod 750 /bin/df

[zix]

> chgrp 140 /bin/df
> chmod 750 /bin/df

thank u, thats perfect :-)