From 605eae21bc0e48b6bcd40dd40f502f68bda31e1e Mon Sep 17 00:00:00 2001
From: topjohnwu <topjohnwu@gmail.com>
Date: Fri, 11 Feb 2022 00:24:12 -0800
Subject: [PATCH] Remove unnecessary read/write

Close #5425
---
 native/jni/zygisk/entry.cpp | 5 ++++-
 native/jni/zygisk/hook.cpp  | 1 -
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/native/jni/zygisk/entry.cpp b/native/jni/zygisk/entry.cpp
index 89c32926a..2f428aa63 100644
--- a/native/jni/zygisk/entry.cpp
+++ b/native/jni/zygisk/entry.cpp
@@ -362,7 +362,10 @@ static void get_process_info(int client, const sock_cred *cred) {
         send_fds(client, fds.data(), fds.size());
     }
 
-    // The following will only happen for system_server
+    if (uid != 1000 || process != "system_server")
+        return;
+
+    // Collect module status from system_server
     int slots = read_int(client);
     int id = 0;
     for (int i = 0; i < slots; ++i) {
diff --git a/native/jni/zygisk/hook.cpp b/native/jni/zygisk/hook.cpp
index 5fd25e2fd..3c413feaa 100644
--- a/native/jni/zygisk/hook.cpp
+++ b/native/jni/zygisk/hook.cpp
@@ -456,7 +456,6 @@ void HookContext::nativeSpecializeAppProcess_pre() {
     } else if (fd >= 0) {
         run_modules_pre(module_fds);
     }
-    write_int(fd, 0);
     close(fd);
 
     close_fds();