[Jailkit-users] [Fwd: Trouble with perl program on Gentoo Linux]

[Olivier Sessink]

I have no perl experience myself at all, so I find it really difficult
to say anything useful about this. It might be that you need much more
then just the perl executable in the jail, for example files from
/usr/share ??

I'll forward the mail to the jailkit-users mailinglist, perhaps we have
some perl experts there..?

Olivier

-------- Original Message --------
Subject: Trouble with perl program on Gentoo Linux
Date: Thu, 16 Mar 2006 12:21:53 -0500
From: John R Larsen <address@hidden>
Reply-To: address@hidden
To: address@hidden

Hello,

I am having trouble running a perl script in a jail.  I'm using
jailkit-1.3 on a Gentoo Linux 2.6.12-gentoo-r9
kernel.  Jailkit seems to be configured correctly and I can connect
using ssh into the jail account.  Other
programs I have tried work fine such as vim, email, and even some other
perl scripts.  I used "jk_init
/home/jail perl" to copy my 5.8.6 perl into the jail.  I have done an
strace on the program in the jail and
compared it to an strace of the same program running outside the jail in
a regular account.  I made a
much simpler test case that demonstrates the same problem.  I have
attached "test.pl",
"test.pl.strace.good", and "test.pl.strace.bad".  The good and bad
straces are from outside and inside the
jail.

The issue is with the "fork" call.  For some reason fork is called with
no parameters when run inside the
jail.  I'm using the perl functions "basename" and "dirname" which are
included with the "use
File::Basename" line.  I've compared file trees for perl inside and
outside the jail and they appear to be
the same.  The File::Basename file is in both places.  Simpler perl
programs that don't use fork seem to
work.

Any ideas?

Thanks for your time,

John

_______________________________________________________
John R Larsen <address@hidden>
http://larsen-family.us

The following section of this message contains a file attachment
prepared for transmission using the Internet MIME message format.
If you are using Pegasus Mail, or any other MIME-compliant system,
you should be able to save it or view it from within your mailer.
If you cannot, please ask your system administrator for assistance.

   ---- File information -----------
     File:  test.pl
     Date:  16 Mar 2006, 12:04
     Size:  837 bytes.
     Type:  Unknown

test.pl
Description: Binary data

The following section of this message contains a file attachment
prepared for transmission using the Internet MIME message format.
If you are using Pegasus Mail, or any other MIME-compliant system,
you should be able to save it or view it from within your mailer.
If you cannot, please ask your system administrator for assistance.

   ---- File information -----------
     File:  test.pl.strace.bad
     Date:  16 Mar 2006, 12:06
     Size:  22931 bytes.
     Type:  Unknown

test.pl.strace.bad
Description: Binary data

The following section of this message contains a file attachment
prepared for transmission using the Internet MIME message format.
If you are using Pegasus Mail, or any other MIME-compliant system,
you should be able to save it or view it from within your mailer.
If you cannot, please ask your system administrator for assistance.

   ---- File information -----------
     File:  test.pl.strace.good
     Date:  16 Mar 2006, 12:19
     Size:  24116 bytes.
     Type:  Unknown

test.pl.strace.good
Description: Binary data