init: Allow customizing boot-alert behavior for devices without display.

To support devices without display, we need a way for customization so wiping
process can be indicated by some board-specific way (ex, blinking LEDs).

TEST=(manually adding board_boot_alert) chromeos-boot-alert /dev/tty1 wipe

Change-Id: I43377b2c3836ee207bef38afb4610e155f25a07a
Reviewed-by: Daniel Erat <>
Commit-Queue: Hung-Te Lin <>
Tested-by: Hung-Te Lin <>
Reviewed-by: Mike Frysinger <>
1 file changed