1 files changed, 7 insertions, 4 deletions
diff --git a/aux/80-columns.sh b/aux/80-columns.sh
index 02a8e81..ae4660e 100755
--- a/aux/80-columns.sh
+++ b/aux/80-columns.sh
@@ -1,9 +1,12 @@
 #!/bin/sh
 set -eu
 
+# shellcheck disable=2068
 for f in ${@:-$(cat -)}; do
-	sed 's/\t/        /g' "$f" |
-		awk -v FNAME="$f" 'length > 80 {
-			printf "%s:%s:%s\n", FNAME, NR, $0
-		}'
+	if [ "$(file -i "$f" | cut -d' ' -f2 | cut -d/ -f1)" = 'text' ]; then
+		sed 's/\t/        /g' "$f" |
+			awk -v FNAME="$f" 'length > 80 {
+				printf "%s:%s:%s\n", FNAME, NR, $0
+			}'
+	fi
 done