[Charlotte.PM] Doing a chroot in Perl

[Christopher Fowler]

On Mon, 2006-08-28 at 16:19 -0400, William McKee wrote:
> On Mon, Aug 28, 2006 at 03:39:47PM -0400, Christopher Fowler wrote:
> > This is part of my script execution that I asked about a week or so ago.
> 
> I'm not sure I saw that hit the list. Are you sure you sent it?

I sent it to another list.  Sorry for confusion.

> 
> 
> > I am now going to extract the script from the database and place it in a
> > chroot environment.  I will then execute it from there.  I'm using this
> > test program before I integrate it into the main code.
> 
> I had to make a few tweaks to get that script to work (e.g., change
> $root and the getpwnam argument). Even after doing so, I didn't have
> much luck getting a chroot environment. The chroot function says that it
> is restricted to the superuser which may be why I'm not seeing much
> change as I'm running it under my login. If I use sudo to run it, the
> script dies at line 28 (getpwnam).

It is having a problem reading /etc/passwd in the chroot environment.  I
want to switch to user tomcat inside the chroot so I waited till after
the chroot to read /etc/passwd.  

> 
> 
> > $ ps > /
> 
> What does that command do in Busybox? In bash, it generates an error
> message.
> 

It displays the ps output and redirects it.  I should read:

ps > /out.txt

> 
> > $ ls -l /out
> > -rw-r--r--    1 500      500          6998 Aug 26 23:42 /out

That would be out.txt
> 
> Who is user 500? tomcat?
> 

Yes

> 
> > As you can see /out is owned by tomcat.tomcat but why was he able to
> > place anything in /out?  Probably something simple I'm not seeing or
> > forgot to do.
> 
> I must not be following you where. You've created a chroot environment
> that contains an /out directory owned by tomcat. This user has the
> permissions to write to the /out directory. Are you asking why the user
> was able to create the directory in the first place?

I'm asking why was tomcat able to redirect the output to a file name
out.txt in / of the chroot.  / in the chroot is owned by root.
 
> 
> 
> William
>