android10 su

 

build/make/core/main.mk
  
@@ -281,7 +281,7 @@ enable_target_debugging := true
 tags_to_install :=
 ifneq (,$(user_variant))
   # Target is secure in user builds.
-  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=1
+  ADDITIONAL_DEFAULT_PROPERTIES += ro.secure=0
   ADDITIONAL_DEFAULT_PROPERTIES += security.perf_harden=1
  
   ifeq ($(user_variant),user)
@@ -293,7 +293,7 @@ ifneq (,$(user_variant))
     tags_to_install += debug
   else
     # Disable debugging in plain user builds.
-    enable_target_debugging :=
+    #enable_target_debugging :=
   endif
  
   # Disallow mock locations by default for user builds
frameworks/base/core/jni/com_android_internal_os_Zygote.cpp
  
@@ -549,7 +549,7 @@ static void EnableKeepCapabilities(fail_fn_t fail_fn) {
 }
  
 static void DropCapabilitiesBoundingSet(fail_fn_t fail_fn) {
-  for (int i = 0; prctl(PR_CAPBSET_READ, i, 0, 0, 0) >= 0; i++) {;
+/*  for (int i = 0; prctl(PR_CAPBSET_READ, i, 0, 0, 0) >= 0; i++) {;
     if (prctl(PR_CAPBSET_DROP, i, 0, 0, 0) == -1) {
       if (errno == EINVAL) {
         ALOGE("prctl(PR_CAPBSET_DROP) failed with EINVAL. Please verify "
@@ -558,7 +558,7 @@ static void DropCapabilitiesBoundingSet(fail_fn_t fail_fn) {
         fail_fn(CREATE_ERROR("prctl(PR_CAPBSET_DROP, %d) failed: %s", i, strerror(errno)));
       }
     }
-  }
+  }*/
 }
  
 static void SetInheritable(uint64_t inheritable, fail_fn_t fail_fn) {
system/core/libcutils/fs_config.cpp
  
@@ -197,7 +197,7 @@ static const struct fs_path_config android_files[] = {
     // the following two files are INTENTIONALLY set-uid, but they
     // are NOT included on user builds.
     { 06755, AID_ROOT,      AID_ROOT,      0, "system/xbin/procmem" },
-    { 04750, AID_ROOT,      AID_SHELL,     0, "system/xbin/su" },
+    { 06755, AID_ROOT,      AID_ROOT,     0, "system/xbin/su" },
  
     // the following files have enhanced capabilities and ARE included
     // in user builds.
system/extras/su/su.cpp
  
@@ -80,8 +80,8 @@ void extract_uidgids(const char* uidgids, uid_t* uid, gid_t* gid, gid_t* gids, i
 }
  
 int main(int argc, char** argv) {
-    uid_t current_uid = getuid();
-    if (current_uid != AID_ROOT && current_uid != AID_SHELL) error(1, 0, "not allowed");
+    //uid_t current_uid = getuid();
+    //if (current_uid != AID_ROOT && current_uid != AID_SHELL) error(1, 0, "not allowed");
  
     // Handle -h and --help.
     ++argv;

参考：https://blog.csdn.net/q1183345443/article/details/77711643?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.compare&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.compare

https://blog.csdn.net/cau_eric/article/details/103086233?utm_medium=distribute.pc_relevant.none-task-blog-baidujs-7&spm=1001.2101.3001.4242