mirror of https://github.com/acidanthera/audk.git
653 lines
21 KiB
C
653 lines
21 KiB
C
/** @file
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Provides interface to shell MAN file parser.
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Copyright (c) 2009 - 2014, 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 "Shell.h"
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/**
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Verifies that the filename has .MAN on the end.
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allocates a new buffer and copies the name (appending .MAN if necessary)
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ASSERT if ManFileName is NULL
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@param[in] ManFileName original filename
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@return the new filename with .man as the extension.
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**/
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CHAR16 *
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EFIAPI
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GetManFileName(
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IN CONST CHAR16 *ManFileName
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)
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{
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CHAR16 *Buffer;
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if (ManFileName == NULL) {
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return (NULL);
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}
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//
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// Fix the file name
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//
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if (StrnCmp(ManFileName+StrLen(ManFileName)-4, L".man", 4)==0) {
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Buffer = AllocateCopyPool(StrSize(ManFileName), ManFileName);
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} else {
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Buffer = AllocateZeroPool(StrSize(ManFileName) + 4*sizeof(CHAR16));
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if (Buffer != NULL) {
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StrnCpy(Buffer, ManFileName, StrLen(ManFileName));
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StrnCat(Buffer, L".man", 4);
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}
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}
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return (Buffer);
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}
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/**
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Search the path environment variable for possible locations and test for
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which one contains a man file with the name specified. If a valid file is found
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stop searching and return the (opened) SHELL_FILE_HANDLE for that file.
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@param[in] FileName Name of the file to find and open.
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@param[out] Handle Pointer to the handle of the found file. The
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value of this is undefined for return values
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except EFI_SUCCESS.
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@retval EFI_SUCCESS The file was found. Handle is a valid SHELL_FILE_HANDLE
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@retval EFI_INVALID_PARAMETER A parameter had an invalid value.
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@retval EFI_NOT_FOUND The file was not found.
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**/
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EFI_STATUS
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EFIAPI
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SearchPathForFile(
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IN CONST CHAR16 *FileName,
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OUT SHELL_FILE_HANDLE *Handle
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)
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{
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CHAR16 *FullFileName;
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EFI_STATUS Status;
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if ( FileName == NULL
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|| Handle == NULL
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|| StrLen(FileName) == 0
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){
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return (EFI_INVALID_PARAMETER);
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}
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FullFileName = ShellFindFilePath(FileName);
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if (FullFileName == NULL) {
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return (EFI_NOT_FOUND);
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}
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//
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// now open that file
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//
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Status = EfiShellOpenFileByName(FullFileName, Handle, EFI_FILE_MODE_READ);
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FreePool(FullFileName);
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return (Status);
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}
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/**
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parses through Buffer (which is MAN file formatted) and returns the
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detailed help for any sub section specified in the comma seperated list of
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sections provided. If the end of the file or a .TH section is found then
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return.
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Upon a sucessful return the caller is responsible to free the memory in *HelpText
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@param[in] Buffer Buffer to read from
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@param[in] Sections name of command's sub sections to find
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@param[in] HelpText pointer to pointer to string where text goes.
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@param[in] HelpSize pointer to size of allocated HelpText (may be updated)
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@retval EFI_OUT_OF_RESOURCES a memory allocation failed.
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@retval EFI_SUCCESS the section was found and its description sotred in
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an alloceted buffer.
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**/
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EFI_STATUS
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EFIAPI
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ManBufferFindSections(
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IN CONST CHAR16 *Buffer,
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IN CONST CHAR16 *Sections,
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IN CHAR16 **HelpText,
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IN UINTN *HelpSize
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)
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{
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EFI_STATUS Status;
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CONST CHAR16 *CurrentLocation;
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BOOLEAN CurrentlyReading;
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CHAR16 *SectionName;
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UINTN SectionLen;
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BOOLEAN Found;
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CHAR16 *TempString;
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CHAR16 *TempString2;
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if ( Buffer == NULL
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|| HelpText == NULL
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|| HelpSize == NULL
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){
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return (EFI_INVALID_PARAMETER);
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}
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Status = EFI_SUCCESS;
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CurrentlyReading = FALSE;
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Found = FALSE;
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for (CurrentLocation = Buffer,TempString = NULL
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; CurrentLocation != NULL && *CurrentLocation != CHAR_NULL
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; CurrentLocation=StrStr(CurrentLocation, L"\r\n"),TempString = NULL
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){
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while(CurrentLocation[0] == L'\r' || CurrentLocation[0] == L'\n') {
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CurrentLocation++;
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}
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if (CurrentLocation[0] == L'#') {
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//
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// Skip comment lines
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//
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continue;
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}
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if (StrnCmp(CurrentLocation, L".TH", 3) == 0) {
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//
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// we hit the end of this commands section so stop.
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//
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break;
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}
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if (StrnCmp(CurrentLocation, L".SH ", 4) == 0) {
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if (Sections == NULL) {
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CurrentlyReading = TRUE;
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continue;
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} else if (CurrentlyReading) {
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CurrentlyReading = FALSE;
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}
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CurrentLocation += 4;
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//
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// is this a section we want to read in?
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//
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if (StrLen(CurrentLocation)!=0) {
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TempString2 = StrStr(CurrentLocation, L" ");
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TempString2 = MIN(TempString2, StrStr(CurrentLocation, L"\r"));
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TempString2 = MIN(TempString2, StrStr(CurrentLocation, L"\n"));
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ASSERT(TempString == NULL);
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TempString = StrnCatGrow(&TempString, NULL, CurrentLocation, TempString2==NULL?0:TempString2 - CurrentLocation);
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if (TempString == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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break;
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}
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SectionName = TempString;
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SectionLen = StrLen(SectionName);
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SectionName = StrStr(Sections, SectionName);
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if (SectionName == NULL) {
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continue;
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}
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if (*(SectionName + SectionLen) == CHAR_NULL || *(SectionName + SectionLen) == L',') {
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CurrentlyReading = TRUE;
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}
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}
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} else if (CurrentlyReading) {
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Found = TRUE;
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if (StrLen(CurrentLocation)!=0) {
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TempString2 = StrStr(CurrentLocation, L"\r");
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TempString2 = MIN(TempString2, StrStr(CurrentLocation, L"\n"));
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ASSERT(TempString == NULL);
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TempString = StrnCatGrow(&TempString, NULL, CurrentLocation, TempString2==NULL?0:TempString2 - CurrentLocation);
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if (TempString == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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break;
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}
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//
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// copy and save the current line.
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//
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ASSERT((*HelpText == NULL && *HelpSize == 0) || (*HelpText != NULL));
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StrnCatGrow (HelpText, HelpSize, TempString, 0);
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if (HelpText == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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break;
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}
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StrnCatGrow (HelpText, HelpSize, L"\r\n", 0);
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if (HelpText == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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break;
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}
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}
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}
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SHELL_FREE_NON_NULL(TempString);
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}
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if (!Found && !EFI_ERROR(Status)) {
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return (EFI_NOT_FOUND);
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}
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return (Status);
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}
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/**
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parses through the MAN file specified by SHELL_FILE_HANDLE and returns the
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detailed help for any sub section specified in the comma seperated list of
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sections provided. If the end of the file or a .TH section is found then
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return.
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Upon a sucessful return the caller is responsible to free the memory in *HelpText
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@param[in] Handle FileHandle to read from
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@param[in] Sections name of command's sub sections to find
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@param[out] HelpText pointer to pointer to string where text goes.
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@param[out] HelpSize pointer to size of allocated HelpText (may be updated)
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@param[in] Ascii TRUE if the file is ASCII, FALSE otherwise.
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@retval EFI_OUT_OF_RESOURCES a memory allocation failed.
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@retval EFI_SUCCESS the section was found and its description sotred in
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an alloceted buffer.
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**/
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EFI_STATUS
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EFIAPI
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ManFileFindSections(
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IN SHELL_FILE_HANDLE Handle,
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IN CONST CHAR16 *Sections,
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OUT CHAR16 **HelpText,
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OUT UINTN *HelpSize,
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IN BOOLEAN Ascii
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)
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{
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EFI_STATUS Status;
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CHAR16 *ReadLine;
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UINTN Size;
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BOOLEAN CurrentlyReading;
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CHAR16 *SectionName;
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UINTN SectionLen;
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BOOLEAN Found;
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if ( Handle == NULL
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|| HelpText == NULL
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|| HelpSize == NULL
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){
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return (EFI_INVALID_PARAMETER);
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}
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Status = EFI_SUCCESS;
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CurrentlyReading = FALSE;
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Size = 1024;
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Found = FALSE;
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ReadLine = AllocateZeroPool(Size);
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if (ReadLine == NULL) {
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return (EFI_OUT_OF_RESOURCES);
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}
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for (;!ShellFileHandleEof(Handle);Size = 1024) {
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Status = ShellFileHandleReadLine(Handle, ReadLine, &Size, TRUE, &Ascii);
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if (ReadLine[0] == L'#') {
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//
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// Skip comment lines
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//
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continue;
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}
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//
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// ignore too small of buffer...
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//
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if (Status == EFI_BUFFER_TOO_SMALL) {
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Status = EFI_SUCCESS;
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}
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if (EFI_ERROR(Status)) {
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break;
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} else if (StrnCmp(ReadLine, L".TH", 3) == 0) {
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//
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// we hit the end of this commands section so stop.
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//
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break;
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} else if (StrnCmp(ReadLine, L".SH", 3) == 0) {
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if (Sections == NULL) {
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CurrentlyReading = TRUE;
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continue;
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}
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//
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// we found a section
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//
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if (CurrentlyReading) {
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CurrentlyReading = FALSE;
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}
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//
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// is this a section we want to read in?
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//
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for ( SectionName = ReadLine + 3
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; *SectionName == L' '
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; SectionName++);
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SectionLen = StrLen(SectionName);
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SectionName = StrStr(Sections, SectionName);
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if (SectionName == NULL) {
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continue;
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}
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if (*(SectionName + SectionLen) == CHAR_NULL || *(SectionName + SectionLen) == L',') {
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CurrentlyReading = TRUE;
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}
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} else if (CurrentlyReading) {
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Found = TRUE;
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//
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// copy and save the current line.
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//
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ASSERT((*HelpText == NULL && *HelpSize == 0) || (*HelpText != NULL));
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StrnCatGrow (HelpText, HelpSize, ReadLine, 0);
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StrnCatGrow (HelpText, HelpSize, L"\r\n", 0);
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}
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}
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FreePool(ReadLine);
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if (!Found && !EFI_ERROR(Status)) {
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return (EFI_NOT_FOUND);
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}
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return (Status);
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}
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/**
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parses through the MAN file formatted Buffer and returns the
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"Brief Description" for the .TH section as specified by Command. If the
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command section is not found return EFI_NOT_FOUND.
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Upon a sucessful return the caller is responsible to free the memory in *BriefDesc
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@param[in] Handle Buffer to read from
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@param[in] Command name of command's section to find
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@param[in] BriefDesc pointer to pointer to string where description goes.
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@param[in] BriefSize pointer to size of allocated BriefDesc
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@retval EFI_OUT_OF_RESOURCES a memory allocation failed.
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@retval EFI_SUCCESS the section was found and its description sotred in
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an alloceted buffer.
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**/
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EFI_STATUS
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EFIAPI
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ManBufferFindTitleSection(
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IN CHAR16 **Buffer,
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IN CONST CHAR16 *Command,
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IN CHAR16 **BriefDesc,
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IN UINTN *BriefSize
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)
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{
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EFI_STATUS Status;
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CHAR16 *TitleString;
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CHAR16 *TitleEnd;
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CHAR16 *CurrentLocation;
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UINTN TitleLength;
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CONST CHAR16 StartString[] = L".TH ";
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CONST CHAR16 EndString[] = L" 0 ";
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if ( Buffer == NULL
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|| Command == NULL
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|| (BriefDesc != NULL && BriefSize == NULL)
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){
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return (EFI_INVALID_PARAMETER);
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}
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Status = EFI_SUCCESS;
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//
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// more characters for StartString and EndString
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//
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TitleLength = StrSize(Command) + (StrLen(StartString) + StrLen(EndString)) * sizeof(CHAR16);
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TitleString = AllocateZeroPool(TitleLength);
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if (TitleString == NULL) {
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return (EFI_OUT_OF_RESOURCES);
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}
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StrnCpy(TitleString, StartString, TitleLength/sizeof(CHAR16) - 1);
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StrnCat(TitleString, Command, TitleLength/sizeof(CHAR16) - 1 - StrLen(TitleString));
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StrnCat(TitleString, EndString, TitleLength/sizeof(CHAR16) - 1 - StrLen(TitleString));
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CurrentLocation = StrStr(*Buffer, TitleString);
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if (CurrentLocation == NULL){
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Status = EFI_NOT_FOUND;
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} else {
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//
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// we found it so copy out the rest of the line into BriefDesc
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// After skipping any spaces or zeroes
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//
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for (CurrentLocation += StrLen(TitleString)
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; *CurrentLocation == L' ' || *CurrentLocation == L'0' || *CurrentLocation == L'1' || *CurrentLocation == L'\"'
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; CurrentLocation++);
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TitleEnd = StrStr(CurrentLocation, L"\"");
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if (TitleEnd == NULL) {
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Status = EFI_DEVICE_ERROR;
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} else {
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if (BriefDesc != NULL) {
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*BriefSize = StrSize(TitleEnd);
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*BriefDesc = AllocateZeroPool(*BriefSize);
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if (*BriefDesc == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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} else {
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StrnCpy(*BriefDesc, CurrentLocation, TitleEnd-CurrentLocation);
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}
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}
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for (CurrentLocation = TitleEnd
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; *CurrentLocation != L'\n'
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; CurrentLocation++);
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for (
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; *CurrentLocation == L' ' || *CurrentLocation == L'\n' || *CurrentLocation == L'\r'
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; CurrentLocation++);
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*Buffer = CurrentLocation;
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}
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}
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FreePool(TitleString);
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return (Status);
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}
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/**
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parses through the MAN file specified by SHELL_FILE_HANDLE and returns the
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"Brief Description" for the .TH section as specified by Command. if the
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command section is not found return EFI_NOT_FOUND.
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Upon a sucessful return the caller is responsible to free the memory in *BriefDesc
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@param[in] Handle FileHandle to read from
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@param[in] Command name of command's section to find
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@param[out] BriefDesc pointer to pointer to string where description goes.
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@param[out] BriefSize pointer to size of allocated BriefDesc
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@param[in, out] Ascii TRUE if the file is ASCII, FALSE otherwise, will be
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set if the file handle is at the 0 position.
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@retval EFI_OUT_OF_RESOURCES a memory allocation failed.
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@retval EFI_SUCCESS the section was found and its description sotred in
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an alloceted buffer.
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**/
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EFI_STATUS
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EFIAPI
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ManFileFindTitleSection(
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IN SHELL_FILE_HANDLE Handle,
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IN CONST CHAR16 *Command,
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OUT CHAR16 **BriefDesc OPTIONAL,
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OUT UINTN *BriefSize OPTIONAL,
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IN OUT BOOLEAN *Ascii
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)
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{
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EFI_STATUS Status;
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CHAR16 *TitleString;
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CHAR16 *ReadLine;
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UINTN Size;
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CHAR16 *TitleEnd;
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UINTN TitleLen;
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BOOLEAN Found;
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UINTN TitleSize;
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if ( Handle == NULL
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|| Command == NULL
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|| (BriefDesc != NULL && BriefSize == NULL)
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){
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return (EFI_INVALID_PARAMETER);
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}
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Status = EFI_SUCCESS;
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Size = 1024;
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Found = FALSE;
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ReadLine = AllocateZeroPool(Size);
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if (ReadLine == NULL) {
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return (EFI_OUT_OF_RESOURCES);
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}
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TitleSize = (4*sizeof(CHAR16)) + StrSize(Command);
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TitleString = AllocateZeroPool(TitleSize);
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if (TitleString == NULL) {
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FreePool(ReadLine);
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return (EFI_OUT_OF_RESOURCES);
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}
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StrnCpy(TitleString, L".TH ", TitleSize/sizeof(CHAR16) - 1);
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StrnCat(TitleString, Command, TitleSize/sizeof(CHAR16) - 1 - StrLen(TitleString));
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TitleLen = StrLen(TitleString);
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for (;!ShellFileHandleEof(Handle);Size = 1024) {
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Status = ShellFileHandleReadLine(Handle, ReadLine, &Size, TRUE, Ascii);
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if (ReadLine[0] == L'#') {
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//
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// Skip comment lines
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//
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continue;
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}
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//
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// ignore too small of buffer...
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//
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if (Status == EFI_BUFFER_TOO_SMALL) {
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Status = EFI_SUCCESS;
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}
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if (EFI_ERROR(Status)) {
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break;
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}
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if (StrnCmp(ReadLine, TitleString, TitleLen) == 0) {
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Found = TRUE;
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//
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// we found it so copy out the rest of the line into BriefDesc
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// After skipping any spaces or zeroes
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//
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for ( TitleEnd = ReadLine+TitleLen
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; *TitleEnd == L' ' || *TitleEnd == L'0' || *TitleEnd == L'1'
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; TitleEnd++);
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if (BriefDesc != NULL) {
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*BriefSize = StrSize(TitleEnd);
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*BriefDesc = AllocateZeroPool(*BriefSize);
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if (*BriefDesc == NULL) {
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Status = EFI_OUT_OF_RESOURCES;
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break;
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}
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StrnCpy(*BriefDesc, TitleEnd, (*BriefSize)/sizeof(CHAR16) - 1);
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}
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break;
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}
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}
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FreePool(ReadLine);
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FreePool(TitleString);
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|
if (!Found && !EFI_ERROR(Status)) {
|
|
return (EFI_NOT_FOUND);
|
|
}
|
|
return (Status);
|
|
}
|
|
|
|
/**
|
|
This function returns the help information for the specified command. The help text
|
|
will be parsed from a UEFI Shell manual page. (see UEFI Shell 2.0 Appendix B)
|
|
|
|
If Sections is specified, then each section name listed will be compared in a casesensitive
|
|
manner, to the section names described in Appendix B. If the section exists,
|
|
it will be appended to the returned help text. If the section does not exist, no
|
|
information will be returned. If Sections is NULL, then all help text information
|
|
available will be returned.
|
|
|
|
if BriefDesc is NULL, then the breif description will not be savedd seperatly,
|
|
but placed first in the main HelpText.
|
|
|
|
@param[in] ManFileName Points to the NULL-terminated UEFI Shell MAN file name.
|
|
@param[in] Command Points to the NULL-terminated UEFI Shell command name.
|
|
@param[in] Sections Points to the NULL-terminated comma-delimited
|
|
section names to return. If NULL, then all
|
|
sections will be returned.
|
|
@param[out] BriefDesc On return, points to a callee-allocated buffer
|
|
containing brief description text.
|
|
@param[out] HelpText On return, points to a callee-allocated buffer
|
|
containing all specified help text.
|
|
|
|
@retval EFI_SUCCESS The help text was returned.
|
|
@retval EFI_OUT_OF_RESOURCES The necessary buffer could not be allocated to hold the
|
|
returned help text.
|
|
@retval EFI_INVALID_PARAMETER HelpText is NULL.
|
|
@retval EFI_INVALID_PARAMETER ManFileName is invalid.
|
|
@retval EFI_NOT_FOUND There is no help text available for Command.
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
ProcessManFile(
|
|
IN CONST CHAR16 *ManFileName,
|
|
IN CONST CHAR16 *Command,
|
|
IN CONST CHAR16 *Sections OPTIONAL,
|
|
OUT CHAR16 **BriefDesc OPTIONAL,
|
|
OUT CHAR16 **HelpText
|
|
)
|
|
{
|
|
CHAR16 *TempString;
|
|
SHELL_FILE_HANDLE FileHandle;
|
|
EFI_STATUS Status;
|
|
UINTN HelpSize;
|
|
UINTN BriefSize;
|
|
BOOLEAN Ascii;
|
|
CHAR16 *TempString2;
|
|
EFI_DEVICE_PATH_PROTOCOL *FileDevPath;
|
|
EFI_DEVICE_PATH_PROTOCOL *DevPath;
|
|
|
|
if ( ManFileName == NULL
|
|
|| Command == NULL
|
|
|| HelpText == NULL
|
|
){
|
|
return (EFI_INVALID_PARAMETER);
|
|
}
|
|
|
|
HelpSize = 0;
|
|
BriefSize = 0;
|
|
TempString = NULL;
|
|
Ascii = FALSE;
|
|
//
|
|
// See if it's in HII first
|
|
//
|
|
TempString = ShellCommandGetCommandHelp(Command);
|
|
if (TempString != NULL) {
|
|
TempString2 = TempString;
|
|
Status = ManBufferFindTitleSection(&TempString2, Command, BriefDesc, &BriefSize);
|
|
if (!EFI_ERROR(Status) && HelpText != NULL){
|
|
Status = ManBufferFindSections(TempString2, Sections, HelpText, &HelpSize);
|
|
}
|
|
} else {
|
|
FileHandle = NULL;
|
|
TempString = GetManFileName(ManFileName);
|
|
if (TempString == NULL) {
|
|
return (EFI_INVALID_PARAMETER);
|
|
}
|
|
|
|
Status = SearchPathForFile(TempString, &FileHandle);
|
|
if (EFI_ERROR(Status)) {
|
|
FileDevPath = FileDevicePath(NULL, TempString);
|
|
DevPath = AppendDevicePath (ShellInfoObject.ImageDevPath, FileDevPath);
|
|
Status = InternalOpenFileDevicePath(DevPath, &FileHandle, EFI_FILE_MODE_READ, 0);
|
|
FreePool(FileDevPath);
|
|
FreePool(DevPath);
|
|
}
|
|
|
|
if (!EFI_ERROR(Status)) {
|
|
HelpSize = 0;
|
|
BriefSize = 0;
|
|
Status = ManFileFindTitleSection(FileHandle, Command, BriefDesc, &BriefSize, &Ascii);
|
|
if (!EFI_ERROR(Status) && HelpText != NULL){
|
|
Status = ManFileFindSections(FileHandle, Sections, HelpText, &HelpSize, Ascii);
|
|
}
|
|
ShellInfoObject.NewEfiShellProtocol->CloseFile(FileHandle);
|
|
} else {
|
|
*HelpText = NULL;
|
|
}
|
|
}
|
|
if (TempString != NULL) {
|
|
FreePool(TempString);
|
|
}
|
|
|
|
return (Status);
|
|
}
|