From 910a36fdc19eab87cf545ec513af54f4d0d9212d Mon Sep 17 00:00:00 2001
From: topjohnwu <topjohnwu@gmail.com>
Date: Wed, 20 Jul 2022 19:28:38 -0700
Subject: [PATCH] Make sepolicy.rules relative if possible

---
 native/jni/init/mount.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/native/jni/init/mount.cpp b/native/jni/init/mount.cpp
index cd86b930d..b82f7d530 100644
--- a/native/jni/init/mount.cpp
+++ b/native/jni/init/mount.cpp
@@ -202,7 +202,15 @@ persist:
 success:
     // Create symlinks so we don't need to go through this logic again
     strcpy(p, "/sepolicy.rules");
-    xsymlink(custom_rules_dir.data(), path);
+    if (char *rel = strstr(custom_rules_dir.data(), MIRRDIR)) {
+        // Create symlink with relative path
+        char s[128];
+        s[0] = '.';
+        strlcpy(s + 1, rel + sizeof(MIRRDIR) - 1, sizeof(s) - 1);
+        xsymlink(s, path);
+    } else {
+        xsymlink(custom_rules_dir.data(), path);
+    }
 }
 
 bool LegacySARInit::mount_system_root() {