From ad9a011a075ae2ff64c5110c6ea9c288fa3bfe17 Mon Sep 17 00:00:00 2001
From: Harshit Jain <harshitjain6751@gmail.com>
Date: Fri, 4 May 2018 14:54:37 +0530
Subject: [PATCH] wayne: light: Throw a warning if path stream ain't valid

---
 light/Light.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/light/Light.cpp b/light/Light.cpp
index c170ae2a..786e8c24 100644
--- a/light/Light.cpp
+++ b/light/Light.cpp
@@ -39,7 +39,14 @@ namespace implementation {
  */
 static void set(std::string path, std::string value) {
     std::ofstream file(path);
-    file << value;
+    /* Only write brightness value if stream is open, alive & well */
+    if (file.is_open()) {
+        file << value;
+    } else {
+        /* Fire a warning a bail out */
+        ALOGE("failed to write %s to %s", value.c_str(), path.c_str());
+        return;
+    }
 }
 
 static void set(std::string path, int value) {