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318 lines
10 KiB
318 lines
10 KiB
4 years ago
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/** @file
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Main file for Parse shell level 2 function.
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(C) Copyright 2013-2015 Hewlett-Packard Development Company, L.P.<BR>
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Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "UefiShellLevel2CommandsLib.h"
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/**
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Check if data is coming from StdIn output.
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@param[in] None
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@retval TRUE StdIn stream data available to parse
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@retval FALSE StdIn stream data is not available to parse.
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**/
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BOOLEAN
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IsStdInDataAvailable (
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VOID
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)
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{
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SHELL_FILE_HANDLE FileHandle;
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EFI_STATUS Status;
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CHAR16 CharBuffer;
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UINTN CharSize;
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UINT64 OriginalFilePosition;
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Status = EFI_SUCCESS;
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FileHandle = NULL;
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OriginalFilePosition = 0;
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if (ShellOpenFileByName (L">i", &FileHandle, EFI_FILE_MODE_READ, 0) == EFI_SUCCESS) {
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CharSize = sizeof(CHAR16);
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gEfiShellProtocol->GetFilePosition (FileHandle, &OriginalFilePosition);
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Status = gEfiShellProtocol->ReadFile (FileHandle, &CharSize, &CharBuffer);
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if (EFI_ERROR (Status) || (CharSize != sizeof(CHAR16))) {
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return FALSE;
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}
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gEfiShellProtocol->SetFilePosition(FileHandle, OriginalFilePosition);
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}
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if (FileHandle == NULL) {
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return FALSE;
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} else {
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return TRUE;
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}
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}
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/**
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Handle stings for SFO Output with escape character ^ in a string
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1. Quotation marks in the string must be escaped by using a ^ character (i.e. ^").
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2. The ^ character may be inserted using ^^.
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@param[in] String The Unicode NULL-terminated string.
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@retval NewString The new string handled for SFO.
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**/
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EFI_STRING
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HandleStringWithEscapeCharForParse (
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IN CHAR16 *String
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)
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{
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EFI_STRING NewStr;
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EFI_STRING StrWalker;
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EFI_STRING ReturnStr;
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if (String == NULL) {
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return NULL;
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}
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//
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// start to parse the input string.
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//
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NewStr = AllocateZeroPool (StrSize (String));
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if (NewStr == NULL) {
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return NULL;
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}
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ReturnStr = NewStr;
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StrWalker = String;
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while (*StrWalker != CHAR_NULL) {
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if (*StrWalker == L'^' && (*(StrWalker + 1) == L'^' || *(StrWalker + 1) == L'"')) {
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*NewStr = *(StrWalker + 1);
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StrWalker++;
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} else {
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*NewStr = *StrWalker;
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}
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StrWalker++;
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NewStr++;
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}
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return ReturnStr;
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}
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/**
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Do the actual parsing of the file. the file should be SFO output from a
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shell command or a similar format.
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@param[in] FileName The filename to open.
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@param[in] TableName The name of the table to find.
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@param[in] ColumnIndex The column number to get.
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@param[in] TableNameInstance Which instance of the table to get (row).
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@param[in] ShellCommandInstance Which instance of the command to get.
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@param[in] StreamingUnicode Indicates Input file is StdIn Unicode streaming data or not
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@retval SHELL_NOT_FOUND The requested instance was not found.
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@retval SHELL_SUCCESS The operation was successful.
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**/
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SHELL_STATUS
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PerformParsing(
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IN CONST CHAR16 *FileName,
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IN CONST CHAR16 *TableName,
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IN CONST UINTN ColumnIndex,
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IN CONST UINTN TableNameInstance,
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IN CONST UINTN ShellCommandInstance,
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IN BOOLEAN StreamingUnicode
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)
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{
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SHELL_FILE_HANDLE FileHandle;
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EFI_STATUS Status;
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BOOLEAN Ascii;
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UINTN LoopVariable;
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UINTN ColumnLoop;
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CHAR16 *TempLine;
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CHAR16 *ColumnPointer;
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SHELL_STATUS ShellStatus;
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CHAR16 *TempSpot;
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CHAR16 *SfoString;
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ASSERT(FileName != NULL);
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ASSERT(TableName != NULL);
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ShellStatus = SHELL_SUCCESS;
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Status = ShellOpenFileByName(FileName, &FileHandle, EFI_FILE_MODE_READ, 0);
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if (EFI_ERROR(Status)) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_OPEN_FAIL), gShellLevel2HiiHandle, L"parse", FileName);
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ShellStatus = SHELL_NOT_FOUND;
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} else if (!EFI_ERROR (FileHandleIsDirectory (FileHandle))) {
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ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_NOT_FILE), gShellLevel2HiiHandle, L"parse", FileName);
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ShellStatus = SHELL_NOT_FOUND;
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} else {
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for (LoopVariable = 0 ; LoopVariable < ShellCommandInstance && !ShellFileHandleEof(FileHandle);) {
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TempLine = ShellFileHandleReturnLine (FileHandle, &Ascii);
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if ((TempLine == NULL) || (*TempLine == CHAR_NULL && StreamingUnicode)) {
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break;
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}
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//
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// Search for "ShellCommand," in the file to start the SFO table
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// for a given ShellCommand. The UEFI Shell spec does not specify
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// a space after the comma.
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//
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if (StrStr (TempLine, L"ShellCommand,") == TempLine) {
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LoopVariable++;
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}
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SHELL_FREE_NON_NULL(TempLine);
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}
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if (LoopVariable == ShellCommandInstance) {
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LoopVariable = 0;
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while(1) {
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TempLine = ShellFileHandleReturnLine (FileHandle, &Ascii);
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if (TempLine == NULL
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|| *TempLine == CHAR_NULL
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|| StrStr (TempLine, L"ShellCommand,") == TempLine) {
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SHELL_FREE_NON_NULL(TempLine);
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break;
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}
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if (StrStr (TempLine, TableName) == TempLine) {
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LoopVariable++;
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if (LoopVariable == TableNameInstance
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|| (TableNameInstance == (UINTN)-1)) {
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for (ColumnLoop = 1, ColumnPointer = TempLine; ColumnLoop < ColumnIndex && ColumnPointer != NULL && *ColumnPointer != CHAR_NULL; ColumnLoop++) {
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ColumnPointer = StrStr (ColumnPointer, L",\"");
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if (ColumnPointer != NULL && *ColumnPointer != CHAR_NULL){
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ColumnPointer++;
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}
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}
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if (ColumnLoop == ColumnIndex) {
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if (ColumnPointer == NULL) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_VALUE), gShellLevel2HiiHandle, L"parse", L"Column Index");
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ShellStatus = SHELL_INVALID_PARAMETER;
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} else {
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TempSpot = StrStr (ColumnPointer, L",\"");
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if (TempSpot != NULL) {
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*TempSpot = CHAR_NULL;
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}
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while (ColumnPointer != NULL && *ColumnPointer != CHAR_NULL && ColumnPointer[0] == L' '){
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ColumnPointer++;
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}
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if (ColumnPointer != NULL && *ColumnPointer != CHAR_NULL && ColumnPointer[0] == L'\"'){
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ColumnPointer++;
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}
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if (ColumnPointer != NULL && *ColumnPointer != CHAR_NULL && ColumnPointer[StrLen (ColumnPointer) - 1] == L'\"'){
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ColumnPointer[StrLen (ColumnPointer) - 1] = CHAR_NULL;
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}
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SfoString = HandleStringWithEscapeCharForParse (ColumnPointer);
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if (SfoString != NULL) {
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ShellPrintEx (-1, -1, L"%s\r\n", SfoString);
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SHELL_FREE_NON_NULL (SfoString);
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}
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}
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}
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}
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}
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SHELL_FREE_NON_NULL(TempLine);
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}
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}
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}
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return (ShellStatus);
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}
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STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
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{L"-i", TypeValue},
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{L"-s", TypeValue},
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{NULL, TypeMax}
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};
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/**
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Function for 'parse' command.
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@param[in] ImageHandle Handle to the Image (NULL if Internal).
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@param[in] SystemTable Pointer to the System Table (NULL if Internal).
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**/
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SHELL_STATUS
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EFIAPI
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ShellCommandRunParse (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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LIST_ENTRY *Package;
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CHAR16 *ProblemParam;
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CONST CHAR16 *FileName;
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CONST CHAR16 *TableName;
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CONST CHAR16 *ColumnString;
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SHELL_STATUS ShellStatus;
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UINTN ShellCommandInstance;
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UINTN TableNameInstance;
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BOOLEAN StreamingUnicode;
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ShellStatus = SHELL_SUCCESS;
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ProblemParam = NULL;
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StreamingUnicode = FALSE;
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//
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// initialize the shell lib (we must be in non-auto-init...)
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//
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Status = ShellInitialize();
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ASSERT_EFI_ERROR(Status);
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//
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// parse the command line
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//
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Status = ShellCommandLineParseEx (ParamList, &Package, &ProblemParam, TRUE, FALSE);
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if (EFI_ERROR(Status)) {
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if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel2HiiHandle, L"parse", ProblemParam);
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FreePool(ProblemParam);
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ShellStatus = SHELL_INVALID_PARAMETER;
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} else {
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ASSERT(FALSE);
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}
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} else {
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StreamingUnicode = IsStdInDataAvailable ();
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if ((!StreamingUnicode && (ShellCommandLineGetCount(Package) < 4)) ||
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(ShellCommandLineGetCount(Package) < 3)) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel2HiiHandle, L"parse");
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ShellStatus = SHELL_INVALID_PARAMETER;
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} else if ((StreamingUnicode && (ShellCommandLineGetCount(Package) > 3)) ||
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(ShellCommandLineGetCount(Package) > 4)) {
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ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel2HiiHandle, L"parse");
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ShellStatus = SHELL_INVALID_PARAMETER;
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} else {
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if (StreamingUnicode) {
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FileName = L">i";
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TableName = ShellCommandLineGetRawValue(Package, 1);
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ColumnString = ShellCommandLineGetRawValue(Package, 2);
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} else {
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FileName = ShellCommandLineGetRawValue(Package, 1);
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TableName = ShellCommandLineGetRawValue(Package, 2);
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ColumnString = ShellCommandLineGetRawValue(Package, 3);
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}
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if (ShellCommandLineGetValue(Package, L"-i") == NULL) {
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TableNameInstance = (UINTN)-1;
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} else {
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TableNameInstance = ShellStrToUintn(ShellCommandLineGetValue(Package, L"-i"));
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}
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if (ShellCommandLineGetValue(Package, L"-s") == NULL) {
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ShellCommandInstance = 1;
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} else {
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ShellCommandInstance = ShellStrToUintn(ShellCommandLineGetValue(Package, L"-s"));
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}
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ShellStatus = PerformParsing(FileName, TableName, ShellStrToUintn(ColumnString), TableNameInstance, ShellCommandInstance, StreamingUnicode);
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}
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}
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//
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// free the command line package
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//
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ShellCommandLineFreeVarList (Package);
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return (ShellStatus);
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}
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