From: Tapan Shah <tapandshah@hpe.com>
Date: Fri, 28 Oct 2016 19:48:59 +0000 (-0700)
Subject: ShellPkg: print only valid characters for file overwrite prompt
X-Git-Tag: edk2-stable201903~5389
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=ac55b925548f3b33f2bc93e603ecffe4a6cb191a;p=mirror_edk2.git

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>
---

diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.c b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
index 2389207a1d..536db3c805 100644
--- a/ShellPkg/Library/UefiShellLib/UefiShellLib.c
+++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
@@ -3403,7 +3403,8 @@ ShellPromptForResponse (
             break;
         }
       }
-      break;    case ShellPromptResponseTypeYesNoAllCancel:
+      break;
+      case ShellPromptResponseTypeYesNoAllCancel:
        if (Prompt != NULL) {
         ShellPrintEx(-1, -1, L"%s", Prompt);
       }
@@ -3421,7 +3422,11 @@ ShellPromptForResponse (
         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':