Mount Borg Repo for Other Users

test.sh

# Tested on CentOS7/AWS
$ sudo adduser borg-1
$ sudo adduser borg-2
$ sudo yum install -y borgbackup
$ sudo mkdir /mnt/repo
$ sudo chown borg-1:borg-1 repo

# Allow access to other users
$ sudo -u borg-1 borg mount -o allow_other w66xh7lj@w66xh7lj.repo.borgbase.com:repo /mnt/repo
$ ll
total 0
drwxr-xr-x. 1 borg-1 borg-1 0 May 24 01:17 repo
$ sudo -u borg-2 ls repo
nyx2.local-remote-test-repo-2018-12-14T12:51:06  nyx2.local__test-repo-2019-05-17T18:59:18
nyx2.local-remote-test-repo-2018-12-14T14:08:00  nyx2.local__test-repo-2019-05-19T11:12:52
...

# Unmount and try without `allow_other`
$ sudo -u borg-1 borg umount /mnt/repo

# Mount without allowing access
$ sudo -u borg-1 borg mount w66xh7lj@w66xh7lj.repo.borgbase.com:repo /mnt/repo
$ sudo -u borg-2 ls -l
ls: cannot access repo: Permission denied
total 0
d????????? ? ? ? ?            ? repo