feat: B1 check: booted through the loader's own EFI boot entry (BootCurrent, a real partition), after every reboot in the boot loader test

share/bootloader-test/boot-check.sh

@@ -7,3 +7,13 @@ compgen -G "/usr/lib/modules/$k/updates/dkms/steamify-fremont-poweroff.ko*" >/de
 sudo dmesg | grep -q "steamify_fremont_poweroff" && pass "power-off fix loaded at boot" || fail "power-off fix not loaded"
 lsmod | grep -q '^leds_valve' && pass "leds_valve loaded" || fail "leds_valve not loaded"
 [[ -z "$(systemctl --failed --no-legend)" ]] && pass "no failed units" || { fail "failed units:"; systemctl --failed --no-legend; }
+# B1: booted through the loader's own EFI boot entry, not the firmware's automatic disk entry (the
+# fallback path \EFI\BOOT\BOOTX64.EFI) and not an entry without a partition (HD(0,GPT,0000...)).
+cur=$(sudo efibootmgr | sed -n 's/^BootCurrent: //p')
+entry=$(sudo efibootmgr -v | grep -a "^Boot$cur")
+if [[ -n "$cur" && "$entry" != *auto_created_boot_option* && "$entry" =~ HD\(([0-9]+),GPT,([0-9a-fA-F-]+) \
+      && "${BASH_REMATCH[1]}" != 0 && "${BASH_REMATCH[2]}" != 00000000-0000-* ]]; then
+    pass "booted through its own EFI entry: $(cut -f1 <<< "$entry" | cut -c1-60)"
+else
+    fail "not booted through its own EFI entry (BootCurrent $cur: $(cut -c1-120 <<< "$entry"))"
+fi