From 7336ccb08a2915bef5eeb6959e83dc28b59738b5 Mon Sep 17 00:00:00 2001
From: Ivo Capanema <ivoliveirabh@hotmail.com>
Date: Wed, 9 Nov 2022 20:41:43 -0300
Subject: [PATCH] fix wrong option on checking empty variable

---
 reinstall-magisk-on-lineageos | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/reinstall-magisk-on-lineageos b/reinstall-magisk-on-lineageos
index d466280..a8909e4 100755
--- a/reinstall-magisk-on-lineageos
+++ b/reinstall-magisk-on-lineageos
@@ -5,7 +5,7 @@ set -e
 PHONE_ADB_SERIAL_NUMBER=${ADB_DEVICE} # The adb serial number can be found by running `adb devices`.
 if [$PHONE_ADB_SERIAL_NUMBER = '']; then
     PHONE_ADB_SERIAL_NUMBER=$(echo $(adb devices) | sed -rn 's/(^|(.* ))([^ ]*) device(( .*)|$)/\3/; T; p; q')
-    if [[ -n $PHONE_ADB_SERIAL_NUMBER ]]; then
+    if [[ -z $PHONE_ADB_SERIAL_NUMBER ]]; then
         print_message "ERROR: no suitable phone connected"
         exit 1
     fi