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Re: [Jailkit-users] jk_init, jk_cp, and Gentoo /lib64

From: Stephen Tallowitz
Subject: Re: [Jailkit-users] jk_init, jk_cp, and Gentoo /lib64
Date: Tue, 8 Aug 2006 22:50:16 +0200

Hello Jeffrey,

my guess is: once you compile bash on AMD64 it uses the real 64bit-libraries 
(in 'lib64') and does not resort to the "legacy" libraries installed in 'lib'. 
jk_init only copies the libraries in 'lib' - what jk_init does in detail is 
defined in /etc/jailkit/jk_init.ini.
So if you're really having a problem with lib64, bash can't find the required 
path in the jail because libc.so is missing in 'lib64'.
jk_cp is more analytic about the problem and actually copies the dependencies 
it finds in the binary (i.e. bash). jk_cp looks through the binary with ldd 
(which also returns full paths of the required libraries) and then copies the 
dependencies into the jail.
If you have some spare time: try adding the lib64 paths to jk_init.ini and 
rebuild the jail using jk_init only - oh and please report back if it works.


On Tue, 8 Aug 2006 14:01:34 -0400
"Jeffrey Erikson" <address@hidden> wrote:

> I went through the instructions for installing and configuring jailkit found
> on the website (using both the 2.0 release and the cvs snapshot).  My system
> is an AMD64 running Gentoo, kernel 2.6.17-gentoo-r4.  When I would try to
> log in with my jailed user both through ssh and via 'su - username', I wound
> up with errors like this:
> /bin/bash: error while loading shared libraries: libc.so.6: cannot open
> shared object file: No such file or directory
> Looking in <chroot>/lib and <chroot>/lib64, it appeared that all the
> libraries were in place.  After a while, on a whim, I decided to use jk_cp
> to copy the libs manually (rather than through jk_init as in the install
> guide).  I got the libs needed for bash copied over, logged in successfully,
> and tried executing some commands, which of course needed different libs.  I
> eventually wrote a simple shell script to copy over all the libs from
> /lib64.  Everything seems to be working.
> My question is, did I miss something in the install or is this something
> weird about AMD64 or Gentoo-specific installs?  I looked through the message
> archives, but I couldn't find much other than advice to make sure the libs
> were there (which they appeared to be at first).
> BTW, now that I have it working, I love jailkit.  Great work!
> Jeffrey Erikson

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