chroot - creating loopback device

[the_jinj]

Hi all

I have setup a chroot jail with all the required utilities and want the user to be able to create and mount a loopback device. The block loop device is correct and all needed commands etc are in place (as far as I know)

I try the following:

$ losetup /dev/loop0 /home/jaileduser/data.crypt
memlock: Cannot allocate memory
Couldn't lock into memory, exiting.

So I check the memory allocation
$ ulimit -l
32

so I try:
$ulimit -l unlimited

but get the error:
ulimit: max locked memory: cannot modify limit: Operation not permitted

I guess to change the memlock value you need to be root but how can i modify this value for each chroot user or am I being mislead by the error and have forgotted something that I need to have this setup work?

Thanks in advance for any help

[lakerdonald]

You can set ulimit to unlimited in /etc/profile for it to be global, but you'll need to run:

. /etc/profile

for the changes to take effect. Or did I misinterpret your question?

[the_jinj]

You can set ulimit to unlimited in /etc/profile for it to be global, but you'll need to run:

. /etc/profile

for the changes to take effect. Or did I misinterpret your question?

Thanks!!
If I set it unlimited there then I can set per user in .bashrc

[lakerdonald]

Yeah.

[the_jinj]

Yeah.

Cheers lakerdonald - that worked