El Tue, 3 de Jun 2014 a las 11:18 PM, Mohit Agrawal
<moagr...@redhat.com> escribió:
Hi,
I want to block the device through the systemd cgroup so I have
created a below unit file
[Unit]
Description=mydevblock
[Service]
DeviceAllow=/dev/zero
ExecStart=/usr/bin/dd if=/dev/zero of=/root/file_1 bs=1M count=40
Restart=always
[Install]
WantedBy=multi-user.target
As per my understanding in this unit file I have allowed only
/dev/zero device so dd command should not create the file_1
successfully it should give the error .
I was under the impression that files that were not devices could be
accessed just fine. If you had the output file as /dev/foo, then I
would expect the command to fail, but this seems valid.
Best regards,
--
Cameron
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