[PATCH 4/4] programs/cmd: Test input has been read before using it.

[Eric Pouech]

From: Eric Pouech

This let confirmations fail when reading from NUL
(instead of looping forever).

Signed-off-by: Eric Pouech 
---
 programs/cmd/builtins.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/programs/cmd/builtins.c b/programs/cmd/builtins.c
index d911f851976..04c879bc18b 100644
--- a/programs/cmd/builtins.c
+++ b/programs/cmd/builtins.c
@@ -228,7 +228,7 @@ static BOOL WCMD_ask_confirm (const WCHAR *message, BOOL showSureText,
       if (showSureText)
         WCMD_output_asis (confirm);
       WCMD_output_asis (options);
-      if (!WCMD_ReadFile(GetStdHandle(STD_INPUT_HANDLE), answer, ARRAY_SIZE(answer), &count))
+      if (!WCMD_ReadFile(GetStdHandle(STD_INPUT_HANDLE), answer, ARRAY_SIZE(answer), &count) || !count)
           return FALSE;
       answer[0] = towupper(answer[0]);
       if (answer[0] == Ybuffer[0])