fixup! Initial version

1 files changed, 6 insertions, 2 deletions

diff --git a/hexdiff.c b/hexdiff.c
index 1f34efc..ca6fcd7 100644
--- a/hexdiff.c
+++ b/hexdiff.c
@@ -74,11 +74,15 @@ main(int argc, const char **argv)
 		} else if (!f2.fname) {
 			f2.fname = *arg;
 		} else {
-			fprintf(stderr, "Usage: hexdiff [-c] FILE FILE\n");
-			return 1;
+			break;
 		}
 	}
 
+	if (!f1.fname || !f2.fname || *arg) {
+		fprintf(stderr, "Usage: hexdiff [-c] FILE FILE\n");
+		return 1;
+	}
+
 	f1.file = fopen(f1.fname, "r");
 	if (!f1.file) err(1, "fopen %s", f1.fname);