How to run custom scripts after swupd update?

foxium · June 13, 2020, 1:01am

My (old) Asus Zenbook refuses to load freestanding-00-intel-ucode.cpio on boot presumably because of an UEFI issue tied to the laptop. After each kernel update, I need to run a script to remove freestanding-00-intel-ucode.cpio from the boot parameters or else the laptop won’t boot.

Is there any way to make swupd call a custom script after updating so I can automate this process?

At the moment my workaround is to use an alias that calls swupd update and then remove the ucode, and disable automatic updates. This works but isn’t ideal.

Would appreciate any and all hints and tips.

karthikprabhuvinod · June 13, 2020, 2:33am

We have something called Heuristics in swupd…basically rules based triggers. Not sure if this helps

github.com

clearlinux/swupd-client/blob/cdf03c14d4370cc02ca592754ed0a72c88e81d50/src/swupd_lib/heuristics.c#L96


static int h_starts_with(const char *s1, const char *s2)
{
	return str_starts_with(s1, s2);
}

static int h_strcmp(const char *s1, const char *s2)
{
	return str_cmp(s1, s2);
}

static const struct rule heuristic_rules[] = {
	// Boot Files
	{"/boot/", h_starts_with, apply_boot, false },
	{"/usr/lib/modules/", h_starts_with, apply_boot, false },

	// State files
	{"/data", h_starts_with, apply_state, false },
	{"/dev/", h_starts_with, apply_state, false },
	{"/home/", h_starts_with, apply_state, false },
	{"/lost+found", h_starts_with, apply_state, false },
	{"/proc/", h_starts_with, apply_state, false },

Also, /usr/lib/systemd/system/update-triggers has some triggers which I believe run after every swupd update.

inmanturbo · June 15, 2020, 10:03am

Systemd is the key create a service unit wanted by update-triggers.target

foxium · June 15, 2020, 10:03am

Thank you for this! This is really nice and is exactly what I needed.