X-Git-Url: https://git.sommitrealweird.co.uk/advent-of-code-2019.git/blobdiff_plain/24a0a2360eb2e4b4332ce45ba5888e72f970428a..refs/heads/main:/day03/wires.sh?ds=inline

diff --git a/day03/wires.sh b/day03/wires.sh
old mode 100644
new mode 100755
index b94ef0b..2c00afd
--- a/day03/wires.sh
+++ b/day03/wires.sh
@@ -15,8 +15,10 @@ set -e
 #wire_1=(R98 U47 R26 D63 R33 U87 L62 D20 R33 U53 R51)
 #wire_2=(U98 R91 D20 R16 D67 R40 U7 R15 U6 R7)
 
+filename=${1:-input.txt}
+
 # read in data from file instead
-exec 3<input.txt
+exec 3<"$filename"
 IFS="," read -u 3 -a wire_1
 IFS="," read -u 3 -a wire_2