ShellPkg/Library/UefiShellLevel2CommandsLib/Set.c

   1 /** @file
   2   Main file for attrib shell level 2 function.
   3
   4   (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
   5   Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
   6   SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include "UefiShellLevel2CommandsLib.h"
  11
  12 /**
  13   Print out each environment variable registered with the Shell 2.0 GUID.
  14
  15   If you spawn a pre 2.0 shell from the Shell 2.0 the environment variable may not carry through.
  16
  17   @retval STATUS_SUCCESS  the printout was sucessful
  18   @return any return code from GetNextVariableName except EFI_NOT_FOUND
  19 **/
  20 SHELL_STATUS
  21 PrintAllShellEnvVars(
  22   VOID
  23   )
  24 {
  25   CONST CHAR16      *Value;
  26   CONST CHAR16      *ConstEnvNameList;
  27
  28   ConstEnvNameList = gEfiShellProtocol->GetEnv(NULL);
  29   if (ConstEnvNameList == NULL) {
  30     return (SHELL_SUCCESS);
  31   }
  32   while (*ConstEnvNameList != CHAR_NULL){
  33     Value = gEfiShellProtocol->GetEnv(ConstEnvNameList);
  34     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SET_DISP), gShellLevel2HiiHandle, ConstEnvNameList, Value);
  35     ConstEnvNameList += StrLen(ConstEnvNameList)+1;
  36   }
  37
  38   return (SHELL_SUCCESS);
  39 }
  40
  41 STATIC CONST SHELL_PARAM_ITEM SetParamList[] = {
  42   {L"-d", TypeValue},
  43   {L"-v", TypeFlag},
  44   {NULL, TypeMax}
  45   };
  46
  47 /**
  48   Function for 'set' command.
  49
  50   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  51   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  52 **/
  53 SHELL_STATUS
  54 EFIAPI
  55 ShellCommandRunSet (
  56   IN EFI_HANDLE        ImageHandle,
  57   IN EFI_SYSTEM_TABLE  *SystemTable
  58   )
  59 {
  60   EFI_STATUS    Status;
  61   LIST_ENTRY    *Package;
  62   CONST CHAR16  *KeyName;
  63   CONST CHAR16  *Value;
  64   CHAR16        *ProblemParam;
  65   SHELL_STATUS  ShellStatus;
  66
  67   ProblemParam = NULL;
  68   ShellStatus  = SHELL_SUCCESS;
  69
  70   //
  71   // initialize the shell lib (we must be in non-auto-init...)
  72   //
  73   Status = ShellInitialize();
  74   ASSERT_EFI_ERROR(Status);
  75
  76   //
  77   // Make sure globals are good...
  78   //
  79   Status = CommandInit();
  80   ASSERT_EFI_ERROR(Status);
  81
  82   //
  83   // parse the command line
  84   //
  85   Status = ShellCommandLineParse (SetParamList, &Package, &ProblemParam, TRUE);
  86   if (EFI_ERROR(Status)) {
  87     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  88       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, L"set", ProblemParam);
  89       FreePool(ProblemParam);
  90       return (SHELL_INVALID_PARAMETER);
  91     } else {
  92       ASSERT(FALSE);
  93     }
  94   } else {
  95     //
  96     // check for "-?"
  97     //
  98     if (ShellCommandLineGetFlag(Package, L"-?")) {
  99       ASSERT(FALSE);
 100     } else if (ShellCommandLineGetRawValue(Package, 3) != NULL) {
 101       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"set");
 102       ShellStatus = SHELL_INVALID_PARAMETER;
 103     } else if (ShellCommandLineGetRawValue(Package, 1) != NULL && ShellCommandLineGetFlag(Package, L"-d")) {
 104       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"set");
 105       ShellStatus = SHELL_INVALID_PARAMETER;
 106     } else if (ShellCommandLineGetFlag(Package, L"-d")) {
 107       //
 108       // delete a environment variable
 109       //
 110       KeyName = ShellCommandLineGetValue(Package, L"-d");
 111       if (KeyName == NULL) {
 112         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_VALUE), gShellLevel2HiiHandle, L"set", L"-d");
 113         ShellStatus = SHELL_INVALID_PARAMETER;
 114       } else {
 115         Status = ShellSetEnvironmentVariable(KeyName, L"", ShellCommandLineGetFlag(Package, L"-v"));
 116         if (EFI_ERROR(Status)) {
 117           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SET_ND), gShellLevel2HiiHandle, L"set", KeyName);
 118           ShellStatus = SHELL_DEVICE_ERROR;
 119         }
 120       }
 121     } else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
 122       //
 123       // print out all current environment variables
 124       //
 125       return(PrintAllShellEnvVars());
 126     } else {
 127       //
 128       // we are either printing one or assigning one
 129       //
 130       KeyName = ShellCommandLineGetRawValue(Package, 1);
 131       Value   = ShellCommandLineGetRawValue(Package, 2);
 132       if (KeyName != NULL && Value != NULL) {
 133         //
 134         // assigning one
 135         //
 136         Status = ShellSetEnvironmentVariable(KeyName, Value, ShellCommandLineGetFlag(Package, L"-v"));
 137         if (EFI_ERROR(Status)) {
 138           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SET_ERROR_SET), gShellLevel2HiiHandle, L"set", KeyName);
 139           ShellStatus = (SHELL_STATUS) (Status & (~MAX_BIT));
 140         }
 141
 142       } else {
 143         if (KeyName != NULL) {
 144           //
 145           // print out value for this one only.
 146           //
 147           Value = ShellGetEnvironmentVariable(KeyName);
 148           if (Value == NULL) {
 149             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SET_NF), gShellLevel2HiiHandle, L"set", KeyName);
 150             ShellStatus = SHELL_SUCCESS;
 151           } else {
 152             ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_SET_DISP), gShellLevel2HiiHandle, KeyName, Value);
 153             ShellStatus = SHELL_SUCCESS;
 154           }
 155         } else {
 156           ASSERT(FALSE);
 157         }
 158       }
 159     }
 160   }
 161
 162   //
 163   // free the command line package
 164   //
 165   ShellCommandLineFreeVarList (Package);
 166
 167   return (ShellStatus);
 168 }