feat(bootloader-interface): identify ourselves as sprout

src/integrations/bootloader_interface.rs

@@ -5,6 +5,9 @@ use uefi::proto::device_path::DevicePath;
 use uefi::{CString16, Guid, guid};
 use uefi_raw::table::runtime::{VariableAttributes, VariableVendor};
 
+/// The name of the bootloader to tell the system.
+const LOADER_NAME: &str = "Sprout";
+
 /// Bootloader Interface support.
 pub struct BootloaderInterface;
 
@@ -30,6 +33,11 @@ impl BootloaderInterface {
         Self::set_cstr16(key, &elapsed.as_micros().to_string())
     }
 
+    /// Tell the system what loader is being used.
+    pub fn set_loader_info() -> Result<()> {
+        Self::set_cstr16("LoaderInfo", LOADER_NAME)
+    }
+
     /// Tell the system the relative path to the partition root of the current bootloader.
     pub fn set_loader_path(path: &DevicePath) -> Result<()> {
         let subpath = device_path_subpath(path).context("unable to get loader path subpath")?;

src/main.rs

@@ -76,6 +76,10 @@ fn run() -> Result<()> {
     BootloaderInterface::set_firmware_info()
         .context("unable to set firmware info in bootloader interface")?;
 
+    // Tell the bootloader interface what loader is being used.
+    BootloaderInterface::set_loader_info()
+        .context("unable to set loader info in bootloader interface")?;
+
     // Parse the options to the sprout executable.
     let options = SproutOptions::parse().context("unable to parse options")?;