X-Git-Url: https://git.sommitrealweird.co.uk/advent-of-code-2021.git/blobdiff_plain/93dfe872eef986673cae31e8e985c547a09209f7..f1b1e23447bb6afd95256acfa9288a8b2680b8ee:/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