ShellPkg/Library/UefiShellLevel2CommandsLib/Set.c

   1 /** @file
   2   Main file for attrib shell level 2 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 "UefiShellLevel2CommandsLib.h"
  16
  17 /**
  18   Print out each environment variable registered with the Shell 2.0 GUID.
  19
  20   If you spawn a pre 2.0 shell from the Shell 2.0 the environment variable may not carry through.
  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 PrintAllShellEnvVars(
  28   VOID
  29   )
  30 {
  31   CONST CHAR16      *Value;
  32   CONST CHAR16      *ConstEnvNameList;
  33
  34   ConstEnvNameList = gEfiShellProtocol->GetEnv(NULL);
  35   if (ConstEnvNameList == NULL) {
  36     return (SHELL_SUCCESS);
  37   }
  38   while (*ConstEnvNameList != CHAR_NULL){
  39     Value = gEfiShellProtocol->GetEnv(ConstEnvNameList);
  40     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SET_DISP), gShellLevel2HiiHandle, ConstEnvNameList, Value);
  41     ConstEnvNameList += StrLen(ConstEnvNameList)+1;
  42   }
  43
  44   return (SHELL_SUCCESS);
  45 }
  46
  47 STATIC CONST SHELL_PARAM_ITEM SetParamList[] = {
  48   {L"-d", TypeValue},
  49   {L"-v", TypeFlag},
  50   {NULL, TypeMax}
  51   };
  52
  53 /**
  54   Function for 'set' command.
  55
  56   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  57   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  58 **/
  59 SHELL_STATUS
  60 EFIAPI
  61 ShellCommandRunSet (
  62   IN EFI_HANDLE        ImageHandle,
  63   IN EFI_SYSTEM_TABLE  *SystemTable
  64   )
  65 {
  66   EFI_STATUS    Status;
  67   LIST_ENTRY    *Package;
  68   CONST CHAR16  *KeyName;
  69   CONST CHAR16  *Value;
  70   CHAR16        *ProblemParam;
  71   SHELL_STATUS  ShellStatus;
  72
  73   ProblemParam = NULL;
  74   ShellStatus  = SHELL_SUCCESS;
  75
  76   //
  77   // initialize the shell lib (we must be in non-auto-init...)
  78   //
  79   Status = ShellInitialize();
  80   ASSERT_EFI_ERROR(Status);
  81
  82   //
  83   // Make sure globals are good...
  84   //
  85   Status = CommandInit();
  86   ASSERT_EFI_ERROR(Status);
  87
  88   //
  89   // parse the command line
  90   //
  91   Status = ShellCommandLineParse (SetParamList, &Package, &ProblemParam, TRUE);
  92   if (EFI_ERROR(Status)) {
  93     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  94       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, ProblemParam);
  95       FreePool(ProblemParam);
  96       return (SHELL_INVALID_PARAMETER);
  97     } else {
  98       ASSERT(FALSE);
  99     }
 100   } else {
 101     //
 102     // check for "-?"
 103     //
 104     if (ShellCommandLineGetFlag(Package, L"-?")) {
 105       ASSERT(FALSE);
 106     } else if (ShellCommandLineGetRawValue(Package, 3) != NULL) {
 107       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle);
 108       ShellStatus = SHELL_INVALID_PARAMETER;
 109     } else if (ShellCommandLineGetRawValue(Package, 1) != NULL && ShellCommandLineGetFlag(Package, L"-d")) {
 110       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle);
 111       ShellStatus = SHELL_INVALID_PARAMETER;
 112     } else if (ShellCommandLineGetFlag(Package, L"-d")) {
 113       //
 114       // delete a environment variable
 115       //
 116       KeyName = ShellCommandLineGetValue(Package, L"-d");
 117       if (KeyName == NULL) {
 118         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_VALUE), gShellLevel2HiiHandle, L"-d");
 119         ShellStatus = SHELL_INVALID_PARAMETER;
 120       } else {
 121         Status = ShellSetEnvironmentVariable(KeyName, L"", ShellCommandLineGetFlag(Package, L"-v"));
 122         if (EFI_ERROR(Status)) {
 123           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SET_ND), gShellLevel2HiiHandle, KeyName, Status);
 124           ShellStatus = SHELL_DEVICE_ERROR;
 125         }
 126       }
 127     } else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
 128       //
 129       // print out all current environment variables
 130       //
 131       return(PrintAllShellEnvVars());
 132     } else {
 133       //
 134       // we are either printing one or assigning one
 135       //
 136       KeyName = ShellCommandLineGetRawValue(Package, 1);
 137       Value   = ShellCommandLineGetRawValue(Package, 2);
 138       if (KeyName != NULL && Value != NULL) {
 139         //
 140         // assigning one
 141         //
 142         Status = ShellSetEnvironmentVariable(KeyName, Value, ShellCommandLineGetFlag(Package, L"-v"));
 143       } else {
 144         if (KeyName != NULL) {
 145           //
 146           // print out value for this one only.
 147           //
 148           Value = ShellGetEnvironmentVariable(KeyName);
 149           if (Value == NULL) {
 150             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SET_NF), gShellLevel2HiiHandle, KeyName);
 151             ShellStatus = SHELL_SUCCESS;
 152           } else {
 153             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SET_DISP), gShellLevel2HiiHandle, KeyName, Value);
 154             ShellStatus = SHELL_SUCCESS;
 155           }
 156         } else {
 157           ASSERT(FALSE);
 158         }
 159       }
 160     }
 161   }
 162
 163   //
 164   // free the command line package
 165   //
 166   ShellCommandLineFreeVarList (Package);
 167
 168   return (ShellStatus);
 169 }