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What is the reason that copying .bash_profile from the host system into the /root directory of an iocage thin jail does not create a file that is visible to the root user when logged on to that jail?

In other words, if I do this from the host system:

cp -p .bash_profile /zroot/iocage/jails/testjail/root/

Then ls -al /zroot/iocage/jails/testjail/root/.bash_profile shows that the file exists.

ls -al /zroot/iocage/jails/testjail/root/.bash_profile
-rwxr-xr-x  1 root  wheel  3274 Dec 12 15:42 /zroot/iocage/jails/testjail/root/.bash_profile

However, when I log on to testjail the file is not visible to the root user:

iocage console testjail
ls -a .bash_profile
ls: .bash_profile: No such file or directory

If I check the mounts on the host system then amoung other things I see this:

zroot/iocage/jails/testjail/root on /zroot/iocage/jails/testjail/root (zfs, local, noatime, nfsv4acls)

Which I believe is the source of my difficulty. How do I put a file into the /root directory of an iocage jail so that it is usable by the root user inside the jail?

James B. Byrne
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2 Answers2

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zroot/iocage/jails/testjail/root on /zroot/iocage/jails/testjail/root (zfs, local, noatime, nfsv4acls)

Q: "... mounts on the host system ... is the source of my difficulty. How do I put a file into the /root directory of an iocage jail so that it is usable by the root user inside the jail?"

A: FWIW. A test file created in a similar mount-point

zroot/jails/test_01 on /local/jails/test_01 (zfs, local, nfsv4acls)

$ touch /local/jails/test_01/root/TEST-FILE
$ ll /local/jails/test_01/root/TEST-FILE 
-rw-r--r--  1 root  wheel  0 Dec 13 12:56 /local/jails/test_01/root/TEST-FILE

is available to root

$ ssh admin@test_01
$ sudo su
root@test_01:/home/admin # bash
root@test_01:/home/admin # cd /root
root@test_01:~ # ll /root/TEST-FILE
-rw-r--r--  1 root  wheel  0 Dec 13 11:56 /root/TEST-FILE

Notes:

  • FreeBSD jails.example.com 12.0-RELEASE FreeBSD 12.0-RELEASE r341666 GENERIC i386
  • Jails created with the Ansible role.
Vladimir Botka
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  • Well, I discovered the answer. `/zroot/iocage/jails/testjail/root` is not the home directory of the root user. `/zroot/iocage/jails/testjail/root/root` is. Apparently the iocage design team did not consider the confusion that might result by naming the 'root' of a jail's file system the same as the home directory of the root user. In any case the mystery is solved. – James B. Byrne Dec 13 '19 at 14:44
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The directory /zroot/iocage/jails/testjail/root/ is not the home directory of the root user; /zroot/iocage/jails/testjail/root/root/ is.

James B. Byrne
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