1 files changed, 10 insertions, 1 deletions
diff --git a/src/unix/tty.c b/src/unix/tty.c
index 9038d85a..7783548a 100644
--- a/src/unix/tty.c
+++ b/src/unix/tty.c
@@ -35,10 +35,19 @@ static uv_spinlock_t termios_spinlock = UV_SPINLOCK_INITIALIZER;
 
 
 int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
+  uv_handle_type type;
   int flags;
   int newfd;
   int r;
 
+  /* File descriptors that refer to files cannot be monitored with epoll.
+   * That restriction also applies to character devices like /dev/random
+   * (but obviously not /dev/tty.)
+   */
+  type = uv_guess_handle(fd);
+  if (type == UV_FILE || type == UV_UNKNOWN_HANDLE)
+    return -EINVAL;
+
   flags = 0;
   newfd = -1;
 
@@ -54,7 +63,7 @@ int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, int fd, int readable) {
    * different struct file, hence changing its properties doesn't affect
    * other processes.
    */
-  if (isatty(fd)) {
+  if (type == UV_TTY) {
     r = uv__open_cloexec("/dev/tty", O_RDWR);
 
     if (r < 0) {