How to create a link outside of the jail, but accessable within the jail?

Question

I have created a chroot jail, but now I want to be able to create a link within the jail which links outside of the jail. Is this possible?

score 5 · Accepted Answer · answered Jan 18 '12 at 00:15

5

The only method I can think of is used of a bind mount. A quick google found http://docs.1h.com/Bind_mounts

answered Jan 18 '12 at 00:15

becomingwisest

This is, pretty much the only way to do it, and it's how openvz does it. – Tom O'Connor Jan 18 '12 at 00:22
1

Yes, indeed: `mount --bind /old /new` – yrk Jan 18 '12 at 00:37

score 5 · Answer 2 · edited May 23 '17 at 12:41

5

Yes, as Christopher said, a bind mount will work. But I think it will work only with directories and not at file level.

If you need file links you can use hard links but it will only work within a Linux ext filesystem (don't know if other fs support it)

See Here for a description of the difference between hard and soft links.

edited May 23 '17 at 12:41

Community

answered Jan 18 '12 at 00:25

user842313

2 Answers2