X-Git-Url: https://git.sommitrealweird.co.uk/advent-of-code-2021.git/blobdiff_plain/64d8769ea65405cdc0a1f8e65a8a1fa25bbf71df..9211cd2ef3bbf35f1328c86c5c6290005c014cb3:/day02/sub.sh

diff --git a/day02/sub.sh b/day02/sub.sh
index b8040aa..2140d4e 100755
--- a/day02/sub.sh
+++ b/day02/sub.sh
@@ -1,6 +1,8 @@
 #!/bin/bash
 
-exec 3<input.txt
+filename="${1:-input.txt}"
+
+exec 3<"$filename"
 depth=0
 horizontal=0
 aim=0