thermal: Add thermal logging daemon

Bug: 126562025
Bug: 144859663
Test: build and check thermal logging
Change-Id: I996546110f4d66b3ff8052cb46000fe0e5f7b0da

hidl/thermal/Android.bp

@@ -44,3 +44,12 @@ cc_binary {
     "-warnings-as-errors=android-*,clang-analyzer-security*,cert-*"
   ],
 }
+
+sh_binary {
+  name: "thermal_logd.samsung",
+  src: "init.thermal.logging.sh",
+  vendor: true,
+  init_rc: [
+    "samsung-thermal-logd.rc",
+  ],
+}

hidl/thermal/init.thermal.logging.sh

@@ -0,0 +1,25 @@
+#!/vendor/bin/sh
+
+if [ $# -eq 1 ]; then
+  interval=$1
+else
+  exit 1
+fi
+
+while true
+do
+  logline="tz:"
+  for f in /sys/class/thermal/thermal*
+  do
+    temp=`cat $f/temp`
+    logline+="|$temp"
+  done
+  logline+=" cdev:"
+  for f in /sys/class/thermal/cooling_device*
+  do
+    cur_state=`cat $f/cur_state`
+    logline+="|$cur_state"
+  done
+  log -p w -t THERMAL_LOG $logline
+  sleep $interval
+done

hidl/thermal/samsung-thermal-logd.rc

@@ -0,0 +1,14 @@
+on property:persist.vendor.log.thermal=1
+    start vendor.thermal.logd
+
+on property:persist.vendor.log.thermal=0
+    stop vendor.thermal.logd
+
+on property:persist.vendor.log.thermal=1 && property:persist.vendor.log.thermal.interval=*
+    restart vendor.thermal.logd
+
+service vendor.thermal.logd /vendor/bin/thermal_logd.samsung ${persist.vendor.log.thermal.interval:-5}
+    class main
+    user root
+    group root system
+    disabled