1 files changed, 63 insertions, 0 deletions
diff --git a/ShellPkg/Library/UefiShellLevel1CommandsLib/Shift.c b/ShellPkg/Library/UefiShellLevel1CommandsLib/Shift.c
new file mode 100644
index 0000000000..9abb4c31b1
--- /dev/null
+++ b/ShellPkg/Library/UefiShellLevel1CommandsLib/Shift.c
@@ -0,0 +1,63 @@
+/** @file
+  Main file for Shift shell level 1 function.
+
+  Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "UefiShellLevel1CommandsLib.h"
+
+/**
+  Function for 'shift' 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
+ShellCommandRunShift (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS          Status;
+  SCRIPT_FILE         *CurrentScriptFile;
+  UINTN               LoopVar;
+
+  Status = CommandInit();
+  ASSERT_EFI_ERROR(Status);
+
+  if (!gEfiShellProtocol->BatchIsActive()) {
+    ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"Shift");
+    return (SHELL_UNSUPPORTED);
+  }
+
+  CurrentScriptFile = ShellCommandGetCurrentScriptFile();
+  ASSERT(CurrentScriptFile != NULL);
+
+  if (CurrentScriptFile->Argc < 2) {
+    ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle);
+    return (SHELL_UNSUPPORTED);
+  }
+
+  for (LoopVar = 0 ; LoopVar < CurrentScriptFile->Argc ; LoopVar++) {
+    if (LoopVar == 0) {
+      SHELL_FREE_NON_NULL(CurrentScriptFile->Argv[LoopVar]);
+    }
+    if (LoopVar < CurrentScriptFile->Argc -1) {
+      CurrentScriptFile->Argv[LoopVar] = CurrentScriptFile->Argv[LoopVar+1];
+    } else {
+      CurrentScriptFile->Argv[LoopVar] = NULL;
+    }
+  }
+  CurrentScriptFile->Argc--;
+  return (SHELL_SUCCESS);
+}
+