Revert "manager: detect init_boot with Android version in uname (tian…

…n#2142)"

This reverts commit 05a9054.

manager/app/src/main/java/me/weishu/kernelsu/ui/util/KsuCli.kt

@@ -4,15 +4,16 @@ import android.content.ContentResolver
 import android.content.Context
 import android.database.Cursor
 import android.net.Uri
+import android.os.Build
 import android.os.Environment
 import android.os.Parcelable
 import android.os.SystemClock
 import android.provider.OpenableColumns
-import android.system.Os
 import android.util.Log
 import com.topjohnwu.superuser.CallbackList
 import com.topjohnwu.superuser.Shell
 import com.topjohnwu.superuser.ShellUtils
+import com.topjohnwu.superuser.io.SuFile
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import kotlinx.parcelize.Parcelize
@@ -311,7 +312,18 @@ fun isAbDevice(): Boolean {
 }
 
 fun isInitBoot(): Boolean {
-    return !Os.uname().release.contains("android12-")
+    val shell = getRootShell()
+    if (shell.isRoot) {
+        // if we have root, use /dev/block/by-name/init_boot to check
+        val abDevice = isAbDevice()
+        val initBootBlock = "/dev/block/by-name/init_boot${if (abDevice) "_a" else ""}"
+        val file = SuFile(initBootBlock)
+        file.shell = shell
+        return file.exists()
+    }
+    // https://source.android.com/docs/core/architecture/partitions/generic-boot
+    return ShellUtils.fastCmd(shell, "getprop ro.product.first_api_level").trim()
+        .toInt() >= Build.VERSION_CODES.TIRAMISU
 }
 
 suspend fun getCurrentKmi(): String = withContext(Dispatchers.IO) {