1 files changed, 35 insertions, 0 deletions
diff --git a/yql/essentials/utils/tty.cpp b/yql/essentials/utils/tty.cpp
new file mode 100644
index 0000000000..57db2d9bf3
--- /dev/null
+++ b/yql/essentials/utils/tty.cpp
@@ -0,0 +1,35 @@
+#include "tty.h"
+#include <util/system/platform.h>
+
+#ifdef _win_
+#include <io.h>
+#include <stdio.h>
+#else
+#include <unistd.h>
+#endif
+
+namespace NYql {
+
+bool IsTty(EStdStream stream) {
+#ifdef _win_
+    switch (stream) {
+    case EStdStream::In:
+        return _isatty(_fileno(stdin));
+    case EStdStream::Out:
+        return _isatty(_fileno(stdout));
+    case EStdStream::Err:
+        return _isatty(_fileno(stderr));
+    }
+#else
+    switch (stream) {
+    case EStdStream::In:
+        return isatty(STDIN_FILENO);
+    case EStdStream::Out:
+        return isatty(STDOUT_FILENO);
+    case EStdStream::Err:
+        return isatty(STDERR_FILENO);
+    }
+#endif
+}
+
+} // namespace NYql