1 files changed, 9 insertions, 2 deletions
diff --git a/os/src/isatty.c b/os/src/isatty.c
index baf78e4..69fef64 100644
--- a/os/src/isatty.c
+++ b/os/src/isatty.c
@@ -1,8 +1,15 @@
 #include <unistd.h>
 #include <reent.h>
+#include <errno.h>
+#include "fio.h"
 #include "osdebug.h"
 
-int _isatty_r(struct _reent * ptr, int fildes) {
-    DBGOUT("_isatty_r(%p, %d)\r\n", ptr, fildes);
+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;
     return 0;
 }