On Thu, Mar 9, 2017 at 3:10 PM, Zbigniew Jędrzejewski-Szmek <zbys...@in.waw.pl> wrote: > On Thu, Mar 09, 2017 at 10:48:03AM +0100, Francis Moreau wrote: >> Hello, >> >> I'm puzzled about systemd-firstboot service. >> >> In my understanding this service is ran only during the firstboot. The >> firstboot condition is detected with the presence of /etc/machine-id >> file. >> >> If this file is not present then it's assumed to be a first boot and >> systemd-firstboot.service is ran and will create the machine-id file. >> >> Now the thing is that I dont see how systemd-firstboot.service can >> have a chance to be started because if /etc/machine-id is missing the >> whole boot is failing due to journald requiring /etc/machine-id. >> >> Could anybody give me some clues ? > > machine_id_setup() is called from main(). So pid1 should set up > /etc/machine-id if possible (/etc is wriable) before it starts the > firstboot services. >
For regular boots /etc is always RO when systemd is started, at least in my understanding. Just give it a try, remove /etc/machine-id and reboots, you'll see that journald will fail. Cheers. -- Francis _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
