Re: [Jailkit-users] libz?

[Olivier Sessink]

On 01/18/2012 09:24 AM, email builder wrote:
[..]
> Hmm.  I zipped up a random README file and used less on it.  When I did
> that from a normal (non-jailed) account, it tells me:
>
> Archive:  README.zip   3925 bytes   1 file
> -rw-r--r--  2.3 unx     9564 tx defN 21-Dec-11 23:55 README
> 1 file, 9564 bytes uncompressed, 3781 bytes compressed:  60.5%
>
> But when I su to a jailed user (or ssh to a jailed user), I get this:
>
> WARNING: terminal is not fully functional
> "README.zip" may be a binary file.  See it anyway?
>
> I hit "y" and then I see lots of e.g. "<F5><CE><9A>-<B01>" which
> goes on randomly for a few pages.
>
> I'm not sure if that's just a terminal issue or if less/libz
> is malfunctioning.  (I tend to think it might just be the
> account's terminal?)

no this looks to like the 'less' inside the jail is either a
different less, or it is missing the zip functionality or library
(I don't know what it needs to read zip files).

[..]
> *Something* had to require it to make jk_init put it into
> the jail, right?  What process does jk_init use to determine
> that?

jk_init and jk_cp use ldd on all the binaries. However, yu cannot see 
all libraries with ldd, libraries that are opened with ldopen() cannot 
be detected that way.


> Normally, does jk_update *remove* unused libraries?

nope, it only detects differences between the real system and the jail

> Or is it normal to have a situation like this with what
> could be an orphaned library in the jail?  (Although it
> seems we don't know for sure that it should not be in
> the jail)

I normally have my jails all configured in jk_init.ini, so after a major 
operating system update I can recreate the jail from scratch using a 
single jk_init command (and then copy the data back into the jail.

Olivier