1 files changed, 7 insertions, 1 deletions
diff --git a/yes.c b/yes.c
index ac67845..a822ebc 100644
--- a/yes.c
+++ b/yes.c
@@ -27,12 +27,18 @@ extern int yes_main(int argc, char **argv)
 {
 	int i;
 
-	if (argc == 1)
+	if (argc >=1 && *argv[1]=='-') {
+		usage("yes [OPTION]... [STRING]...\n\n"
+				"Repeatedly outputs a line with all specified STRING(s), or `y'.\n");
+	}
+
+	if (argc == 1) {
 		while (1)
 			if (puts("y") == EOF) {
 				perror("yes");
 				exit(FALSE);
 			}
+	}
 
 	while (1)
 		for (i = 1; i < argc; i++)