Hi Svante,
On 19/2/20 15:17, Svante Signell via Dng wrote:
Hello,
No replies so far from the devuan-dev list. Maybe with a larger audience I can
get some help!
Thanks!
Checking whether the *inode* number of the primary directory in the
standard filesystem hierarchy
used in the most unix-like sytems(that is, the root "/" directory) is
*equal* to 2 will help to differentiate
if you are within a container or not. eg you can do:
$ ls --inode --directory "/"
2 /
While in a container the output of this command will return a high inode
number. I tested it in three
different scenarios:
a) Using docker bash shell of ubuntu:
# docker run -it ubuntu bash
root@b87da5b70a84:/# ls --inode --directory "/"
2492863 /
b) Using a qemu qcow2 image of devuan:
$ ls --inode --directory "/"
9531 /
c) Inside the chroot jail of the live-sdk:
root@devuan:/# ls --inode --directory "/"
22839335 /
I reckon this approach won't work neither in the case of operating
systems using random inode numbers
(but this is not our case),nor in the case of chroot jails rooted on a
mount point, in which case we have
the following workaround(at least in debian-based systems):
https://manpages.debian.org/jessie/debianutils/ischroot.1.en.html
Hope this helps,
Aitor.
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