commit ac55b925548f3b33f2bc93e603ecffe4a6cb191a
author Tapan Shah <tapandshah@hpe.com> Fri Oct 28 12:48:59 2016 -0700
committer Jaben Carsey <jaben.carsey@intel.com> Mon Oct 31 08:21:05 2016 -0700
tree dfb8fd6e3620c348edb8d05d6793d50bded9687f
parent b3400560603bcfaadc08e82a846933446b5afed3

ShellPkg: print only valid characters for file overwrite prompt

When copy command prompts to overwrite an existing file, pressing
backspace continuously removes everything including the shell prompt.
So print only valid characters for file overwrite prompt.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Tapan Shah <tapandshah@hpe.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>

ShellPkg/Library/UefiShellLib/UefiShellLib.c

diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.c b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
index 2389207..536db3c 100644
--- a/ShellPkg/Library/UefiShellLib/UefiShellLib.c
+++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
@@ -3403,7 +3403,8 @@
             break;

         }

       }

-      break;    case ShellPromptResponseTypeYesNoAllCancel:

+      break;

+      case ShellPromptResponseTypeYesNoAllCancel:

        if (Prompt != NULL) {

         ShellPrintEx(-1, -1, L"%s", Prompt);

       }

@@ -3421,7 +3422,11 @@
         if (EFI_ERROR(Status)) {

           break;

         }

-        ShellPrintEx(-1, -1, L"%c", Key.UnicodeChar);

+

+        if (Key.UnicodeChar <= 127 && Key.UnicodeChar >= 32) {

+          ShellPrintEx (-1, -1, L"%c", Key.UnicodeChar);

+        }

+

         switch (Key.UnicodeChar) {

           case L'Y':

           case L'y':