1 files changed, 5 insertions, 7 deletions
diff --git a/os/src/isatty.c b/os/src/isatty.c
index 69fef64..051284f 100644
--- a/os/src/isatty.c
+++ b/os/src/isatty.c
@@ -2,14 +2,12 @@
 #include <reent.h>
 #include <errno.h>
 #include "fio.h"
-#include "osdebug.h"
 
 int _isatty_r(struct _reent * reent, int fd) {
-    DBGOUT("_isatty_r(%p, %d)\r\n", reent, fd);
-//    if (!fio_is_open(fd)) {
-//        reent->_errno = EBADF;
-//        return 0;
-//    }
-//    reent->_errno = EINVAL;
+    if (!fio_is_open(fd)) {
+        reent->_errno = EBADF;
+        return 0;
+    }
+    reent->_errno = EINVAL;
     return 0;
 }