1 files changed, 4 insertions, 0 deletions
diff --git a/broadcast.c b/broadcast.c
index e5957ae..afea3e4 100644
--- a/broadcast.c
+++ b/broadcast.c
@@ -54,6 +54,10 @@ int main(int argc, char *argv[]) {
     int local = STDERR_FILENO;
     int remote = STDOUT_FILENO;
 
+    if (isatty(remote)) {
+        errx(EX_USAGE, "stdout is not redirected");
+    }
+
     error = tcgetattr(local, &saveTerm);
     if (error) err(EX_IOERR, "tcgetattr");
     atexit(restoreTerm);