1 files changed, 115 insertions, 0 deletions
diff --git a/roms/edk2/ShellPkg/Library/UefiShellLevel3CommandsLib/Echo.c b/roms/edk2/ShellPkg/Library/UefiShellLevel3CommandsLib/Echo.c
new file mode 100644
index 000000000..9bab8ef65
--- /dev/null
+++ b/roms/edk2/ShellPkg/Library/UefiShellLevel3CommandsLib/Echo.c
@@ -0,0 +1,115 @@
+/** @file
+  Main file for Echo shell level 3 function.
+
+  (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
+  Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved. <BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "UefiShellLevel3CommandsLib.h"
+
+#include <Library/ShellLib.h>
+
+STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
+  {L"-on", TypeFlag},
+  {L"-off", TypeFlag},
+  {NULL, TypeMax}
+  };
+
+/**
+  Function for 'echo' command.
+
+  @param[in] ImageHandle  Handle to the Image (NULL if Internal).
+  @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
+**/
+SHELL_STATUS
+EFIAPI
+ShellCommandRunEcho (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS          Status;
+  LIST_ENTRY          *Package;
+  SHELL_STATUS        ShellStatus;
+  UINTN               ParamCount;
+  CHAR16              *ProblemParam;
+  UINTN               Size;
+  CHAR16              *PrintString;
+
+  Size                = 0;
+  ProblemParam        = NULL;
+  PrintString         = NULL;
+  ShellStatus         = SHELL_SUCCESS;
+
+  //
+  // initialize the shell lib (we must be in non-auto-init...)
+  //
+  Status = ShellInitialize();
+  ASSERT_EFI_ERROR(Status);
+
+  //
+  // parse the command line
+  //
+  Status = ShellCommandLineParseEx (ParamList, &Package, &ProblemParam, TRUE, TRUE);
+  if (EFI_ERROR(Status)) {
+    if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
+      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, L"echo", ProblemParam);
+      FreePool(ProblemParam);
+      ShellStatus = SHELL_INVALID_PARAMETER;
+    } else {
+      ASSERT(FALSE);
+    }
+  } else {
+    //
+    // check for "-?"
+    //
+    if (ShellCommandLineGetFlag(Package, L"-?")) {
+      ASSERT(FALSE);
+    }
+    if (ShellCommandLineGetFlag(Package, L"-on")) {
+      //
+      // Turn it on
+      //
+      ShellCommandSetEchoState(TRUE);
+    } else if (ShellCommandLineGetFlag(Package, L"-off")) {
+      //
+      // turn it off
+      //
+      ShellCommandSetEchoState(FALSE);
+    } else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
+      //
+      // output its current state
+      //
+      if (ShellCommandGetEchoState()) {
+        ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_ECHO_ON), gShellLevel3HiiHandle);
+      } else {
+        ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_ECHO_OFF), gShellLevel3HiiHandle);
+      }
+    } else {
+      //
+      // print the line
+      //
+      for ( ParamCount = 1
+          ; ShellCommandLineGetRawValue(Package, ParamCount) != NULL
+          ; ParamCount++
+         ) {
+        StrnCatGrow(&PrintString, &Size, ShellCommandLineGetRawValue(Package, ParamCount), 0);
+        if (ShellCommandLineGetRawValue(Package, ParamCount+1) != NULL) {
+          StrnCatGrow(&PrintString, &Size, L" ", 0);
+        }
+      }
+      ShellPrintEx(-1, -1, L"%s\r\n", PrintString);
+      SHELL_FREE_NON_NULL(PrintString);
+    }
+
+    //
+    // free the command line package
+    //
+    ShellCommandLineFreeVarList (Package);
+  }
+
+  return (ShellStatus);
+}
+