ShellPkg/Library/UefiShellLevel3CommandsLib/Alias.c

   1 /** @file
   2   Main file for Alias shell level 3 function.
   3
   4   Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved. <BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "UefiShellLevel3CommandsLib.h"
  16
  17 #include <Library/ShellLib.h>
  18
  19 /**
  20   Print out each alias registered with the Shell.
  21
  22   @retval STATUS_SUCCESS  the printout was sucessful
  23   @return any return code from GetNextVariableName except EFI_NOT_FOUND
  24 **/
  25 SHELL_STATUS
  26 EFIAPI
  27 PrintAllShellAlias(
  28   VOID
  29   )
  30 {
  31   CONST CHAR16      *ConstAllAliasList;
  32   CHAR16            *Alias;
  33   CONST CHAR16      *Command;
  34   CHAR16            *Walker;
  35   BOOLEAN           Volatile;
  36
  37   Volatile = FALSE;
  38
  39   ConstAllAliasList = gEfiShellProtocol->GetAlias(NULL, NULL);
  40   if (ConstAllAliasList == NULL) {
  41     return (SHELL_SUCCESS);
  42   }
  43   Alias = AllocateZeroPool(StrSize(ConstAllAliasList));
  44   Walker = (CHAR16*)ConstAllAliasList;
  45
  46   do {
  47     CopyMem(Alias, Walker, StrSize(Walker));
  48     Walker = StrStr(Alias, L";");
  49     if (Walker != NULL) {
  50       Walker[0] = CHAR_NULL;
  51       Walker = Walker + 1;
  52     }
  53     Command = gEfiShellProtocol->GetAlias(Alias, &Volatile);
  54     if (ShellCommandIsOnAliasList(Alias)) {
  55       Volatile = FALSE;
  56     }
  57     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_ALIAS_OUTPUT), gShellLevel3HiiHandle, !Volatile?L' ':L'*', Alias, Command);
  58   } while (Walker != NULL && Walker[0] != CHAR_NULL);
  59
  60   FreePool(Alias);
  61
  62   return (SHELL_SUCCESS);
  63 }
  64
  65 STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
  66   {L"-v", TypeFlag},
  67   {L"-d", TypeFlag},
  68   {NULL, TypeMax}
  69   };
  70
  71 /**
  72   Function for 'alias' command.
  73
  74   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  75   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  76 **/
  77 SHELL_STATUS
  78 EFIAPI
  79 ShellCommandRunAlias (
  80   IN EFI_HANDLE        ImageHandle,
  81   IN EFI_SYSTEM_TABLE  *SystemTable
  82   )
  83 {
  84   EFI_STATUS          Status;
  85   LIST_ENTRY          *Package;
  86   CHAR16              *ProblemParam;
  87   SHELL_STATUS        ShellStatus;
  88   CONST CHAR16        *Param1;
  89   CONST CHAR16        *Param2;
  90
  91   ProblemParam        = NULL;
  92   ShellStatus         = SHELL_SUCCESS;
  93
  94   //
  95   // initialize the shell lib (we must be in non-auto-init...)
  96   //
  97   Status = ShellInitialize();
  98   ASSERT_EFI_ERROR(Status);
  99
 100   Status = CommandInit();
 101   ASSERT_EFI_ERROR(Status);
 102
 103   //
 104   // parse the command line
 105   //
 106   Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
 107   if (EFI_ERROR(Status)) {
 108     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
 109       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, ProblemParam);
 110       FreePool(ProblemParam);
 111       ShellStatus = SHELL_INVALID_PARAMETER;
 112     } else {
 113       ASSERT(FALSE);
 114     }
 115   } else {
 116     Param1 = ShellCommandLineGetRawValue(Package, 1);
 117     Param2 = ShellCommandLineGetRawValue(Package, 2);
 118     //
 119     // check for "-?"
 120     //
 121     if (ShellCommandLineGetFlag(Package, L"-?")) {
 122       ASSERT(FALSE);
 123     }
 124     if (ShellCommandLineGetCount(Package) == 1) {
 125       //
 126       // print out alias'
 127       //
 128       Status = PrintAllShellAlias();
 129     } else if (ShellCommandLineGetFlag(Package, L"-d")) {
 130       //
 131       // delete an alias
 132       //
 133       Status = gEfiShellProtocol->SetAlias(Param1, NULL, TRUE, FALSE);
 134     } else if (ShellCommandLineGetCount(Package) == 3) {
 135       //
 136       // must be adding an alias
 137       //
 138       Status = gEfiShellProtocol->SetAlias(Param2, Param1, FALSE, ShellCommandLineGetFlag(Package, L"-v"));
 139       if (EFI_ERROR(Status)) {
 140         if (Status == EFI_ACCESS_DENIED) {
 141           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_ERR_AD), gShellLevel3HiiHandle);
 142           ShellStatus = SHELL_ACCESS_DENIED;
 143         } else {
 144           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_ERR_UK), gShellLevel3HiiHandle, Status);
 145           ShellStatus = SHELL_DEVICE_ERROR;
 146         }
 147       }
 148     } else if (ShellCommandLineGetCount(Package) == 2) {
 149       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel3HiiHandle);
 150       ShellStatus = SHELL_INVALID_PARAMETER;
 151     } else {
 152       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle);
 153       ShellStatus = SHELL_INVALID_PARAMETER;
 154     }
 155     //
 156     // free the command line package
 157     //
 158     ShellCommandLineFreeVarList (Package);
 159   }
 160
 161   return (ShellStatus);
 162 }