ksud: add /data/adb/ksu/bin to PATH (#343)

userspace/ksud/src/event.rs

@@ -248,5 +248,21 @@ pub fn install() -> Result<()> {
     std::fs::copy("/proc/self/exe", defs::DAEMON_PATH)?;
 
     // install binary assets
-    assets::ensure_binaries().with_context(|| "Failed to extract assets")
+    assets::ensure_binaries().with_context(|| "Failed to extract assets")?;
+
+    #[cfg(target_os = "android")]
+    link_ksud_to_bin()?;
+
+    Ok(())
+}
+
+#[cfg(target_os = "android")]
+fn link_ksud_to_bin() -> Result<()> {
+    use std::path::PathBuf;
+    let ksu_bin = PathBuf::from(defs::DAEMON_PATH);
+    let ksu_bin_link = PathBuf::from(defs::DAEMON_LINK_PATH);
+    if ksu_bin.exists() && !ksu_bin_link.exists() {
+        std::os::unix::fs::symlink(&ksu_bin, &ksu_bin_link)?;
+    }
+    Ok(())
 }