From c975fc9ebbcc7d82c16e9eadd2aceb6b9d040389 Mon Sep 17 00:00:00 2001
From: Chih-Wei Huang <cwhuang@linux.org.tw>
Date: Fri, 28 Jun 2019 12:14:42 +0800
Subject: [PATCH] 1-install: fix wpa_supplicant.conf created unexpectedly

The busybox sed -i is buggy to create an empty file if that file
doesn't exist. That causes unexpected issue.
---
 install/scripts/1-install | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/install/scripts/1-install b/install/scripts/1-install
index 5162b08..c427f24 100644
--- a/install/scripts/1-install
+++ b/install/scripts/1-install
@@ -344,7 +344,7 @@ try_upgrade()
 		if [ -d "$prev" ]; then
 			mv $prev $1
 			rm -rf $1/data/dalvik-cache/* $1/data/system/wpa_supplicant
-			sed -i 's/\(ctrl_interface=\)\(.*\)/\1wlan0/' $1/data/misc/wifi/wpa_supplicant.conf
+			[ -s $1/data/misc/wifi/wpa_supplicant.conf ] && sed -i 's/\(ctrl_interface=\)\(.*\)/\1wlan0/' $1/data/misc/wifi/wpa_supplicant.conf
 		fi
 	fi
 }
-- 
2.11.0