From 03f8bbc181c08862e93b8a2baa3c2e2f6710d0b1 Mon Sep 17 00:00:00 2001
From: Yadong Qi <yadong.qi@intel.com>
Date: Thu, 29 Jun 2023 15:20:24 +0800
Subject: [PATCH] Add logcat2hvc service to redirect logcat to hvc

Logcat2hvc service redirects logcat message to HVC (Hyperv Console)
device, this is a debug purpose service for CrosVM Celadon Windows.

Signed-off-by: Yadong Qi <yadong.qi@intel.com>
Tracked-On: OAM-114661
---
 logcat2hvc/Android.bp    | 21 +++++++++++++++++++++
 logcat2hvc/logcat2hvc    | 12 ++++++++++++
 logcat2hvc/logcat2hvc.rc |  8 ++++++++
 3 files changed, 41 insertions(+)
 create mode 100644 logcat2hvc/Android.bp
 create mode 100755 logcat2hvc/logcat2hvc
 create mode 100644 logcat2hvc/logcat2hvc.rc

diff --git a/logcat2hvc/Android.bp b/logcat2hvc/Android.bp
new file mode 100644
index 0000000..491413a
--- /dev/null
+++ b/logcat2hvc/Android.bp
@@ -0,0 +1,21 @@
+//
+// Copyright (C) 2023 Intel Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at                                                                                                                                //
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+sh_binary {
+    name: "logcat2hvc",
+    src: "logcat2hvc",
+    init_rc: ["logcat2hvc.rc"],
+    required: ["logcat2hvc"],
+}
diff --git a/logcat2hvc/logcat2hvc b/logcat2hvc/logcat2hvc
new file mode 100755
index 0000000..fb439fd
--- /dev/null
+++ b/logcat2hvc/logcat2hvc
@@ -0,0 +1,12 @@
+#! /system/bin/sh
+
+# Start logcat then if logcat exits, restart from the most recently
+# logged log, such that duplicates are not sent when restarting.
+
+[ ! -c /dev/hvc0 ] && exit -1
+
+logcat "$@"
+
+while true; do
+    logcat -T1 "$@"
+done
diff --git a/logcat2hvc/logcat2hvc.rc b/logcat2hvc/logcat2hvc.rc
new file mode 100644
index 0000000..472fb9e
--- /dev/null
+++ b/logcat2hvc/logcat2hvc.rc
@@ -0,0 +1,8 @@
+service logcat2hvc /system/bin/logcat2hvc -b all -v threadtime -f /dev/hvc0 *:V
+    group system
+    oneshot
+
+#on property:logd.ready=true
+
+on init
+    start logcat2hvc