Treat ASCII 0x7F as backspace for TtyTerm terminals

Treat ASCII 0x7F as backspace, rather than delete, for TTY terminals.  This
better matches the default Linux terminal settings that are used when connecting
to a simulated platform using xterm or a similar terminal program.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Roy Franz <roy.franz@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Feng Tian <feng.tian@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17896 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c
index 17a1244349d806069a7625b19dff5811458bb4c9..227df85f69086f1ad19d4e559168163e54f0dcc2 100644 (file)
--- a/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c
+++ b/MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c
@@ -1561,8 +1561,14 @@ UnicodeToEfiKey (
     }\r
 \r
     if (UnicodeChar == DEL) {\r
-      Key.ScanCode    = SCAN_DELETE;\r
-      Key.UnicodeChar = 0;\r
+      if (TerminalDevice->TerminalType == TTYTERMTYPE) {\r
+        Key.ScanCode    = SCAN_NULL;\r
+        Key.UnicodeChar = CHAR_BACKSPACE;\r
+      }\r
+      else {\r
+        Key.ScanCode    = SCAN_DELETE;\r
+        Key.UnicodeChar = 0;\r
+      }\r
     } else {\r
       Key.ScanCode    = SCAN_NULL;\r
       Key.UnicodeChar = UnicodeChar;\r