problem with screen in jail

reeaver · 05-06-2006, 04:56 PM

Hi,

I`ve just made a jail environment for users, using clues from:
http://www.jmcresearch.com/projects/...ies_setup.html
There was no problems until I tried to install the screen in the jail.

The "screen" command gives an error:

Code:

Must be connected to a terminal.

I`ve found the information that, a good idea is to mount the /proc folder into the jail. So, I did it.

Code:

mount -t proc proc /home/users/chroot/proc

After that I have other error:

Code:

Cannot open your terminal '/dev/pts/1' - please check.

The file`s permissions are rather OK.

Code:

reeaver@alpha:~$ ls -la /dev/pts/1 
crw--w----  1 reeaver tty 136, 1 May  6 23:13 /dev/pts/1

(chmod 766, 777 doesn`t help)

Command w gives something like this:

Code:

reeaver@alpha:~$ w 
 23:32:05 up 21 min,  0 users,  load average: 0.00, 0.00, 0.01 
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT

I`ve found no information at google how to solve this problem.

Any ideas?

Slackware 10.2, Kernel 2.4.32-grsec

unSpawn · 05-08-2006, 04:29 AM

If you run libc6-2.2.4 then upgrading to libc6-2.2.6 will fix this.
Elif you run anything more recent than libc6-2.2.4 then try running the "screen" command through strace (-o logfile) should provide leads. If you're going to post output from strace please do not post too much info by egrepping for errors, something like "(\-.1|ENO.*)$", and please post *exact* loglines.

reeaver · 05-08-2006, 08:25 AM

I upgraded this library, but also I mounted the /dev directory into the jail:

Code:

mount -t devpts devpts /home/users/chroot/dev/pts

Now screen in jail works fine.

Thank you unSpawn.