1 files changed, 31 insertions, 0 deletions
diff --git a/util/sbase/tty.c b/util/sbase/tty.c
new file mode 100644
index 00000000..65151287
--- /dev/null
+++ b/util/sbase/tty.c
@@ -0,0 +1,31 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <unistd.h>
+
+#include "util.h"
+
+static void
+usage(void)
+{
+	enprintf(2, "usage: %s\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	char *tty;
+
+	ARGBEGIN {
+	default:
+		usage();
+	} ARGEND
+
+	if (argc)
+		usage();
+
+	tty = ttyname(STDIN_FILENO);
+	puts(tty ? tty : "not a tty");
+
+	enfshut(2, stdout, "<stdout>");
+	return !tty;
+}