1 files changed, 33 insertions, 0 deletions
diff --git a/driver/utils/isMinTTY.c b/driver/utils/isMinTTY.c
new file mode 100644
index 0000000000..3b3ae27bf3
--- /dev/null
+++ b/driver/utils/isMinTTY.c
@@ -0,0 +1,33 @@
+/*
+ * We need Vista headers to use the GetFileInformationByHandleEx function and
+ * the FILE_NAME_INFO struct.
+ */
+#define WINVER 0x0600
+#define _WIN32_WINNT 0x0600
+
+#include <stdbool.h>
+#include <windows.h>
+#include "isMINTTY.h"
+
+bool isMinTTY() {
+  const HANDLE h = GetStdHandle(STD_ERROR_HANDLE);
+  if (h == NULL || h == INVALID_HANDLE_VALUE) {
+    return false;
+  } else if (GetFileType(h) != FILE_TYPE_PIPE) {
+    return false;
+  }
+
+  const unsigned long bufSize = sizeof(DWORD) + MAX_PATH * sizeof(WCHAR);
+  BYTE buf[bufSize];
+  PFILE_NAME_INFO pfni = (PFILE_NAME_INFO) buf;
+
+  if (!GetFileInformationByHandleEx(h, FileNameInfo, buf, bufSize)) {
+    return false;
+  }
+
+  PWSTR fn = pfni->FileName;
+  fn[pfni->FileNameLength] = L'\0';
+
+  return ((wcsstr(fn, L"\\cygwin-") || wcsstr(fn, L"\\msys-")) &&
+           wcsstr(fn, L"-pty") && wcsstr(fn, L"-master"));
+}