mirror of https://github.com/acidanthera/audk.git
EmbeddedPkg/Ebl: Add support for env variable deletion
Passing only the variable name should delete the environment variable if it exists. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11477 6f19259b-4bc3-4df7-8a09-765794883524
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@ -55,7 +55,7 @@ EblGetCmd (
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Size = 0;
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Status = gRT->GetVariable (VariableName, &gEfiGlobalVariableGuid, NULL, &Size, Value);
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if (Status == EFI_NOT_FOUND) {
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AsciiPrint("Variable name '%a' not found.\n",VariableName);
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AsciiPrint("Variable name '%s' not found.\n",VariableName);
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} else if (Status == EFI_BUFFER_TOO_SMALL) {
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// Get the environment variable value
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Value = AllocatePool (Size);
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@ -117,7 +117,27 @@ EblSetCmd (
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// Check if it is a valid variable setting
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AsciiValue = AsciiStrStr (AsciiVariableSetting,"=");
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if (AsciiValue == NULL) {
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//
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// There is no value. It means this variable will be deleted
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//
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// Convert VariableName into Unicode
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VariableName = AllocatePool((AsciiStrLen (AsciiVariableSetting) + 1) * sizeof (CHAR16));
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AsciiStrToUnicodeStr (AsciiVariableSetting,VariableName);
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Status = gRT->SetVariable (
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VariableName,
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&gEfiGlobalVariableGuid,
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( !Volatile ? EFI_VARIABLE_NON_VOLATILE : 0) |
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EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
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0,
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NULL
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);
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if (!EFI_ERROR(Status)) {
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AsciiPrint("Variable '%s' deleted\n",VariableName);
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} else {
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AsciiPrint("Variable setting is incorrect. It should be VariableName=Value\n");
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}
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return Status;
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}
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@ -158,8 +178,9 @@ EblSetCmd (
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AsciiStrLen (AsciiValue)+1,
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AsciiValue
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);
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if (!EFI_ERROR(Status)) {
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AsciiPrint("'%a'='%a'\n",AsciiVariableName,AsciiValue);
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}
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return Status;
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}
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