From ce5aa990edaf2ce6a6b351568ecebf217f7cb301 Mon Sep 17 00:00:00 2001
From: weishu <twsxtd@gmail.com>
Date: Mon, 11 Mar 2024 12:48:25 +0800
Subject: [PATCH] ksud: don't patch if it's already patched

---
 userspace/ksud/src/boot_patch.rs | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/userspace/ksud/src/boot_patch.rs b/userspace/ksud/src/boot_patch.rs
index c665cb8185f5..361ca99a98c4 100644
--- a/userspace/ksud/src/boot_patch.rs
+++ b/userspace/ksud/src/boot_patch.rs
@@ -162,10 +162,13 @@ pub fn patch(
             .status()?;
         ensure!(status.success(), "magiskboot unpack failed");
 
-        let status = do_cpio_cmd(&magiskboot, workding_dir.path(), "exists init");
-        if status.is_ok() {
-            // init exist, backup it.
-            do_cpio_cmd(&magiskboot, workding_dir.path(), "mv init init.real")?;
+        let is_kernelsu_patched = do_cpio_cmd(&magiskboot, workding_dir.path(), "exists kernelsu.ko").is_ok();
+        if !is_kernelsu_patched {
+            // kernelsu.ko is not exist, backup init if necessary
+            let status = do_cpio_cmd(&magiskboot, workding_dir.path(), "exists init");
+            if status.is_ok() {
+                do_cpio_cmd(&magiskboot, workding_dir.path(), "mv init init.real")?;
+            }
         }
 
         do_cpio_cmd(&magiskboot, workding_dir.path(), "add 0755 init init")?;