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   if (Alias == NULL) {
  45     return (SHELL_OUT_OF_RESOURCES);
  46   }
  47   Walker = (CHAR16*)ConstAllAliasList;
  48
  49   do {
  50     CopyMem(Alias, Walker, StrSize(Walker));
  51     Walker = StrStr(Alias, L";");
  52     if (Walker != NULL) {
  53       Walker[0] = CHAR_NULL;
  54       Walker = Walker + 1;
  55     }
  56     Command = gEfiShellProtocol->GetAlias(Alias, &Volatile);
  57     if (ShellCommandIsOnAliasList(Alias)) {
  58       Volatile = FALSE;
  59     }
  60     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_ALIAS_OUTPUT), gShellLevel3HiiHandle, !Volatile?L' ':L'*', Alias, Command);
  61   } while (Walker != NULL && Walker[0] != CHAR_NULL);
  62
  63   FreePool(Alias);
  64
  65   return (SHELL_SUCCESS);
  66 }
  67
  68 STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
  69   {L"-v", TypeFlag},
  70   {L"-d", TypeFlag},
  71   {NULL, TypeMax}
  72   };
  73
  74 /**
  75   Function for 'alias' command.
  76
  77   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  78   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  79 **/
  80 SHELL_STATUS
  81 EFIAPI
  82 ShellCommandRunAlias (
  83   IN EFI_HANDLE        ImageHandle,
  84   IN EFI_SYSTEM_TABLE  *SystemTable
  85   )
  86 {
  87   EFI_STATUS          Status;
  88   LIST_ENTRY          *Package;
  89   CHAR16              *ProblemParam;
  90   SHELL_STATUS        ShellStatus;
  91   CONST CHAR16        *Param1;
  92   CONST CHAR16        *Param2;
  93
  94   ProblemParam        = NULL;
  95   ShellStatus         = SHELL_SUCCESS;
  96
  97   //
  98   // initialize the shell lib (we must be in non-auto-init...)
  99   //
 100   Status = ShellInitialize();
 101   ASSERT_EFI_ERROR(Status);
 102
 103   Status = CommandInit();
 104   ASSERT_EFI_ERROR(Status);
 105
 106   //
 107   // parse the command line
 108   //
 109   Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
 110   if (EFI_ERROR(Status)) {
 111     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
 112       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, ProblemParam);
 113       FreePool(ProblemParam);
 114       ShellStatus = SHELL_INVALID_PARAMETER;
 115     } else {
 116       ASSERT(FALSE);
 117     }
 118   } else {
 119     Param1 = ShellCommandLineGetRawValue(Package, 1);
 120     Param2 = ShellCommandLineGetRawValue(Package, 2);
 121     //
 122     // check for "-?"
 123     //
 124     if (ShellCommandLineGetFlag(Package, L"-?")) {
 125       ASSERT(FALSE);
 126     }
 127     if (ShellCommandLineGetCount(Package) == 1) {
 128       //
 129       // print out alias'
 130       //
 131       Status = PrintAllShellAlias();
 132     } else if (ShellCommandLineGetFlag(Package, L"-d")) {
 133       //
 134       // delete an alias
 135       //
 136       Status = gEfiShellProtocol->SetAlias(Param1, NULL, TRUE, FALSE);
 137     } else if (ShellCommandLineGetCount(Package) == 3) {
 138       //
 139       // must be adding an alias
 140       //
 141       Status = gEfiShellProtocol->SetAlias(Param2, Param1, FALSE, ShellCommandLineGetFlag(Package, L"-v"));
 142       if (EFI_ERROR(Status)) {
 143         if (Status == EFI_ACCESS_DENIED) {
 144           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_ERR_AD), gShellLevel3HiiHandle);
 145           ShellStatus = SHELL_ACCESS_DENIED;
 146         } else {
 147           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_ERR_UK), gShellLevel3HiiHandle, Status);
 148           ShellStatus = SHELL_DEVICE_ERROR;
 149         }
 150       }
 151     } else if (ShellCommandLineGetCount(Package) == 2) {
 152       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel3HiiHandle);
 153       ShellStatus = SHELL_INVALID_PARAMETER;
 154     } else {
 155       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle);
 156       ShellStatus = SHELL_INVALID_PARAMETER;
 157     }
 158     //
 159     // free the command line package
 160     //
 161     ShellCommandLineFreeVarList (Package);
 162   }
 163
 164   return (ShellStatus);
 165 }