systemd: prepare the /etc overlay prior to launching systemd
systemd performs a bunch of critical tasks prior to loading any unit
files from disk, or running generators. Examples of this include the
/etc/machine-id setup (which we worked around by a bind mount some time
ago), or reading )and setting) the hostname configuration.
Rather than playing the whack-a-mole game over and over again by adding
just enough scripts to re-kick a given daemon/subsystem once a
particular /etc file becomes available, this change moves /etc setup
(which includes the overlay and the /cfg filesystem as well) into an
"initramfs" (without actually using a separate initramfs, of course).
Thanks to Mantas Mikulėnas (grawity on IRC) for suggesting this.
Change-Id: I9ec4d7f1243929ea498142d435ae6689c53b6097
diff --git a/board/czechlight/clearfog/boot.scr.txt b/board/czechlight/clearfog/boot.scr.txt
index 5a12f39..bf45913 100644
--- a/board/czechlight/clearfog/boot.scr.txt
+++ b/board/czechlight/clearfog/boot.scr.txt
@@ -7,8 +7,7 @@
i2c mw 0x60 0x0a 0x80
i2c mw 0x60 0x0b 0x80
i2c mw 0x60 0x0c 0x80
-setenv bootargs root=/dev/mmcblk0p${rauc_part} rauc.slot=${rauc_slot} czechlight=${czechlight} systemd.machine_id=${machineid} panic=10 oops=panic
-setenv bootargs ${bootargs} spidev.bufsiz=65535
+setenv bootargs root=/dev/mmcblk0p${rauc_part} init=/sbin/init-czechlight.sh rauc.slot=${rauc_slot} czechlight=${czechlight} systemd.machine_id=${machineid} panic=10 oops=panic spidev.bufsiz=65535
if test -n ${czechlight} && load mmc 0:${rauc_part} ${fdt_addr_r} /boot/${czechlight}-clearfog.dtb; then
echo "DTS: ${czechlight}-clearfog"
else