On Tue, Feb 26, 2019 at 7:29 PM Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
Hi All,
As part of improving the boot experience:
https://fedoraproject.org/wiki/Changes/FlickerFreeBoot
https://hansdegoede.livejournal.com/20119.html
I took a look at how applying offline updates looks
when pressing ESC to get the detailed view, pk-offline-update
then prints "dnf update" like output, but at the same time
systemd is printing:
[ ***] A start job is running for offline-updates
Messages to the console, the 2 get intermixed and this looks
quite bad and makes the status update of the actual
update process almost impossible to follow.
Is there something which I can put in the
/lib/systemd/system/system-update.target.wants/packagekit-offline-update.service
service file to suppress the knightrider status updates ?
I think the official name is "cylon eye status updates".
Hmm, I *thought* it was possible to disable this by something like flock()'ing the console device, and systemd-fsck was supposed to do that in order to avoid the job status from mixing with the "fsck: x% complete" output. But it looks like that functionality was lost, or never present, and indeed even systemd-fsck's output is trashed by the "job is running" messages, from what I remember.
Looking at source code (manager_get_show_status, unit_needs_console, exec_context_may_touch_console), the output should be disabled if at least one currently active unit has a tty as its stdin/stdout, and/or any of the tty_reset/tty_vhangup options enabled. So maybe StandardOutput=tty, TTYPath=/dev/console would achieve this?
Mantas Mikulėnas
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