1 files changed, 16 insertions, 0 deletions
diff --git a/usr/klibc/isatty.c b/usr/klibc/isatty.c
new file mode 100644
index 0000000..2359479
--- /dev/null
+++ b/usr/klibc/isatty.c
@@ -0,0 +1,16 @@
+/*
+ * isatty.c
+ */
+
+#include <unistd.h>
+#include <termios.h>
+#include <errno.h>
+
+int isatty(int fd)
+{
+	struct termios dummy;
+
+	/* All ttys support TIOCGPGRP */
+	/* except /dev/console which needs TCGETS */
+	return !ioctl(fd, TCGETS, &dummy);
+}