Add the files

1 files changed, 32 insertions, 0 deletions

diff --git a/src/detection/bootmgr/bootmgr_linux.c b/src/detection/bootmgr/bootmgr_linux.c
new file mode 100644
index 0000000..0fd019a
--- /dev/null
+++ b/src/detection/bootmgr/bootmgr_linux.c
@@ -0,0 +1,32 @@
+#include "bootmgr.h"
+#include "common/io.h"
+#include "efi_helper.h"
+
+#include <stdalign.h>
+
+#define FF_EFIVARS_PATH_PREFIX "/sys/firmware/efi/efivars/"
+
+const char* ffDetectBootmgr(FFBootmgrResult* result) {
+    alignas(uint16_t) uint8_t buffer[2048];
+
+    if (ffReadFileData(FF_EFIVARS_PATH_PREFIX "BootCurrent-" FF_EFI_GLOBAL_GUID, sizeof(buffer), buffer) != 6) {
+        return "Failed to read efivar: BootCurrent";
+    }
+
+    result->order = *(uint16_t*) &buffer[4];
+
+    snprintf((char*) buffer, sizeof(buffer), FF_EFIVARS_PATH_PREFIX "Boot%04X-" FF_EFI_GLOBAL_GUID, result->order);
+
+    ssize_t size = ffReadFileData((const char*) buffer, sizeof(buffer), buffer);
+    if (size < 5 + (int) sizeof(FFEfiLoadOption) || size == (ssize_t) sizeof(buffer)) {
+        return "Failed to read efivar: Boot####";
+    }
+
+    ffEfiFillLoadOption((FFEfiLoadOption*) &buffer[4], result);
+
+    if (ffReadFileData(FF_EFIVARS_PATH_PREFIX "SecureBoot-" FF_EFI_GLOBAL_GUID, sizeof(buffer), buffer) >= 5) {
+        result->secureBoot = buffer[4] == 1;
+    }
+
+    return NULL;
+}