From 0d4377558f8406a7408b80ea6edd0596961a84ec Mon Sep 17 00:00:00 2001
From: Eric Hameleers <alien@slackware.com>
Date: Fri, 5 Apr 2024 18:14:15 +0200
Subject: Prevent error message caused by empty variable

---
 upslak.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'upslak.sh')

diff --git a/upslak.sh b/upslak.sh
index 0a82690..c36071d 100644
--- a/upslak.sh
+++ b/upslak.sh
@@ -1106,7 +1106,7 @@ if [ -f "${EXTENSION}" ]; then
       # User already mounted the USB linux partition; remove mountpoint:
       EXTENSION="${EXTENSION#$EXTMNT}"
     fi
-elif [ "$(dirname ${EXTENSION})" == "." ]; then
+elif [ -n "${EXTENSION}" && "$(dirname ${EXTENSION})" == "." ]; then
   # Containerfile was provided without leading slash, add one:
   EXTENSION="/${EXTENSION}"
 fi
-- 
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