chroot shell in Fedora

[Bob Byron]

You nailed it.  That got it working, Thank You!

Nalin Dahyabhai wrote:

>On Mon, Jan 19, 2004 at 07:00:15PM -0600, Bob Byron wrote:
>  
>
>>Has anyone succeeded in making a chroot'd shell in Fedora?
>>
>>I have followed the instructions in the following document to try and
>>make a chroot'd environment.  It has potential, but I cannot get a
>>chroot command that will work.
>>
>>Here is the howto I followed:  http://www.tjw.org/chroot-login-HOWTO/
>>
>>But, when I "chroot /usr/jail", the environment does not see the
>>/usr/jail/etc/passwd or /usr/jail/etc/group files.  If I do a "ls -l" to
>>get a long directory listing, I get the follwing:
>>
>>drwxr-xr-x    2 0        0            4096 Jan 18 16:12 bin
>>drwxr-xr-x    2 0        0            4096 Jan 15 00:38 dev
>>drwxr-xr-x    2 0        0            4096 Jan 18 16:09 etc
>>drwxr-xr-x    3 0        0            4096 Jan 15 00:34 lib
>>drwxrwxrwt    2 0        0            4096 Jan 18 05:23 tmp
>>drwxr-xr-x    3 0        0            4096 Jan 18 05:24 usr
>>               ^Owner   ^Group
>>
>>Notice the UID's and the GID's are displayed instead of the actual names.
>>
>>So, why does Fedora not see the passwd and group files?
>>    
>>
>
>ls converts the UIDs and GIDs to user and group names by asking libc to
>look up information, and libc uses loadable modules to do the heavy
>lifting.  To read the passwd and group files, libc needs the
>libnss_files-*.so module installed in /lib, in addition to whatever
>libraries 'ldd' lists as being required.
>
>Running 'ls' under 'strace' in the chroot and watching for calls to
>open() may yield more information if that doesn't just fix it.
>
>HTH,
>
>Nalin
>
>
>  
>
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