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
  33   while (*ConstEnvNameList != CHAR_NULL) {
  34     Value = gEfiShellProtocol->GetEnv (ConstEnvNameList);
  35     ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_SET_DISP), gShellLevel2HiiHandle, ConstEnvNameList, Value);
  36     ConstEnvNameList += StrLen (ConstEnvNameList)+1;
  37   }
  38
  39   return (SHELL_SUCCESS);
  40 }
  41
  42 STATIC CONST SHELL_PARAM_ITEM  SetParamList[] = {
  43   { L"-d", TypeValue },
  44   { L"-v", TypeFlag  },
  45   { NULL,  TypeMax   }
  46 };
  47
  48 /**
  49   Function for 'set' command.
  50
  51   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  52   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  53 **/
  54 SHELL_STATUS
  55 EFIAPI
  56 ShellCommandRunSet (
  57   IN EFI_HANDLE        ImageHandle,
  58   IN EFI_SYSTEM_TABLE  *SystemTable
  59   )
  60 {
  61   EFI_STATUS    Status;
  62   LIST_ENTRY    *Package;
  63   CONST CHAR16  *KeyName;
  64   CONST CHAR16  *Value;
  65   CHAR16        *ProblemParam;
  66   SHELL_STATUS  ShellStatus;
  67
  68   ProblemParam = NULL;
  69   ShellStatus  = SHELL_SUCCESS;
  70
  71   //
  72   // initialize the shell lib (we must be in non-auto-init...)
  73   //
  74   Status = ShellInitialize ();
  75   ASSERT_EFI_ERROR (Status);
  76
  77   //
  78   // Make sure globals are good...
  79   //
  80   Status = CommandInit ();
  81   ASSERT_EFI_ERROR (Status);
  82
  83   //
  84   // parse the command line
  85   //
  86   Status = ShellCommandLineParse (SetParamList, &Package, &ProblemParam, TRUE);
  87   if (EFI_ERROR (Status)) {
  88     if ((Status == EFI_VOLUME_CORRUPTED) && (ProblemParam != NULL)) {
  89       ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, L"set", ProblemParam);
  90       FreePool (ProblemParam);
  91       return (SHELL_INVALID_PARAMETER);
  92     } else {
  93       ASSERT (FALSE);
  94     }
  95   } else {
  96     //
  97     // check for "-?"
  98     //
  99     if (ShellCommandLineGetFlag (Package, L"-?")) {
 100       ASSERT (FALSE);
 101     } else if (ShellCommandLineGetRawValue (Package, 3) != NULL) {
 102       ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"set");
 103       ShellStatus = SHELL_INVALID_PARAMETER;
 104     } else if ((ShellCommandLineGetRawValue (Package, 1) != NULL) && ShellCommandLineGetFlag (Package, L"-d")) {
 105       ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"set");
 106       ShellStatus = SHELL_INVALID_PARAMETER;
 107     } else if (ShellCommandLineGetFlag (Package, L"-d")) {
 108       //
 109       // delete a environment variable
 110       //
 111       KeyName = ShellCommandLineGetValue (Package, L"-d");
 112       if (KeyName == NULL) {
 113         ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_VALUE), gShellLevel2HiiHandle, L"set", L"-d");
 114         ShellStatus = SHELL_INVALID_PARAMETER;
 115       } else {
 116         Status = ShellSetEnvironmentVariable (KeyName, L"", ShellCommandLineGetFlag (Package, L"-v"));
 117         if (EFI_ERROR (Status)) {
 118           ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_SET_ND), gShellLevel2HiiHandle, L"set", KeyName);
 119           ShellStatus = SHELL_DEVICE_ERROR;
 120         }
 121       }
 122     } else if (ShellCommandLineGetRawValue (Package, 1) == NULL) {
 123       //
 124       // print out all current environment variables
 125       //
 126       return (PrintAllShellEnvVars ());
 127     } else {
 128       //
 129       // we are either printing one or assigning one
 130       //
 131       KeyName = ShellCommandLineGetRawValue (Package, 1);
 132       Value   = ShellCommandLineGetRawValue (Package, 2);
 133       if ((KeyName != NULL) && (Value != NULL)) {
 134         //
 135         // assigning one
 136         //
 137         Status = ShellSetEnvironmentVariable (KeyName, Value, ShellCommandLineGetFlag (Package, L"-v"));
 138         if (EFI_ERROR (Status)) {
 139           ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_SET_ERROR_SET), gShellLevel2HiiHandle, L"set", KeyName);
 140           ShellStatus = (SHELL_STATUS)(Status & (~MAX_BIT));
 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 }