1 files changed, 4 insertions, 0 deletions
diff --git a/main.ha b/main.ha
index 1782cc5..a056a4d 100644
--- a/main.ha
+++ b/main.ha
@@ -53,6 +53,10 @@ export fn main() void = {
 		os::exit(1);
 	};
 
+	if (!tty::isatty(os::stdin_file)) {
+		fmt::fatal("Error: stdin is not a tty");
+	};
+
 	let path = cmd.args[0];
 	let mode = os::stat(path)!.mode;
 	if (mode & fs::mode::DIR != 0) {