Add a ~s0ix~ test script to the ~liveusb~ system

Signed-off-by: Magic_RB <magic_rb@redalder.org>

nixos/systems/liveusb/default.nix

@@ -29,6 +29,32 @@ in
             ../../common/nixpkgs.nix
           ];
 
+          environment.systemPackages = [
+            (pkgs.writeShellScriptBin "test-s0ix" ''
+              _cpu_residency="/sys/devices/system/cpu/cpuidle/low_power_idle_cpu_residency_us"
+              _system_residency="/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us"
+
+              echo '> '"$_system_residency before"
+              _residency_before=$(cat "$_system_residency")
+              echo "$_residency_before"
+
+              echo "Suspending to RAM and resuming in 30 seconds..."
+              rtcwake -u -s 30 -m mem -n && systemctl suspend
+
+              echo '> '"$_system_residency after"
+              _residency_after=$(cat "$_system_residency")
+              echo "$_residency_after"
+
+              if [ $_residency_before -lt $_residency_after ] ; then
+                echo "Suspend successful"
+              elso
+                echo "Suspend unsuccessful"
+              fi
+
+              ${lib'.getExe pkgs.smartmontools} -a $(echo /dev/nvme?n? | tr ' ' '\n' | head -n 1)
+            '')
+          ];
+
           isoImage.edition = "xfce";
 
           services.xserver.videoDrivers = [ "nvidia" ];