diff --git a/term.go b/term.go
new file mode 100644
index 0000000..7efc353
--- /dev/null
+++ b/term.go
@@ -0,0 +1,13 @@
+package main
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+// IsTerminal returns true if the given file descriptor is a terminal.
+func IsTerminal(fd uintptr) bool {
+	var termios syscall.Termios
+	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
+	return err == 0
+}