add stdin support

1 files changed, 9 insertions, 3 deletions

diff --git a/factor b/factor
index 81bc614..c40e0f4 100755
--- a/factor
+++ b/factor
@@ -20,6 +20,12 @@ factor() {
 	printf '\n'
 }
 
-for i in $*; do
-	factor $i
-done
+if [ -z "$*" ]; then
+	while read -r i; do
+		factor $i
+	done
+else
+	for i in $*; do
+		factor $i
+	done
+fi