diff options
Diffstat (limited to 'Core/ShellPkg/Application/Shell/ShellManParser.c')
| -rw-r--r-- | Core/ShellPkg/Application/Shell/ShellManParser.c | 1004 |
1 files changed, 1004 insertions, 0 deletions
diff --git a/Core/ShellPkg/Application/Shell/ShellManParser.c b/Core/ShellPkg/Application/Shell/ShellManParser.c new file mode 100644 index 0000000000..7a290e16f6 --- /dev/null +++ b/Core/ShellPkg/Application/Shell/ShellManParser.c @@ -0,0 +1,1004 @@ +/** @file
+ Provides interface to shell MAN file parser.
+
+ Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
+ Copyright 2015 Dell Inc.
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "Shell.h"
+
+#define SHELL_MAN_HII_GUID \
+{ \
+ 0xf62ccd0c, 0x2449, 0x453c, { 0x8a, 0xcb, 0x8c, 0xc5, 0x7c, 0xf0, 0x2a, 0x97 } \
+}
+
+EFI_HII_HANDLE mShellManHiiHandle = NULL;
+EFI_HANDLE mShellManDriverHandle = NULL;
+
+
+SHELL_MAN_HII_VENDOR_DEVICE_PATH mShellManHiiDevicePath = {
+ {
+ {
+ HARDWARE_DEVICE_PATH,
+ HW_VENDOR_DP,
+ {
+ (UINT8) (sizeof (VENDOR_DEVICE_PATH)),
+ (UINT8) ((sizeof (VENDOR_DEVICE_PATH)) >> 8)
+ }
+ },
+ SHELL_MAN_HII_GUID
+ },
+ {
+ END_DEVICE_PATH_TYPE,
+ END_ENTIRE_DEVICE_PATH_SUBTYPE,
+ {
+ (UINT8) (END_DEVICE_PATH_LENGTH),
+ (UINT8) ((END_DEVICE_PATH_LENGTH) >> 8)
+ }
+ }
+};
+
+
+/**
+ Convert a Unicode character to upper case only if
+ it maps to a valid small-case ASCII character.
+
+ This internal function only deal with Unicode character
+ which maps to a valid small-case ASCII character, i.e.
+ L'a' to L'z'. For other Unicode character, the input character
+ is returned directly.
+
+ @param Char The character to convert.
+
+ @retval LowerCharacter If the Char is with range L'a' to L'z'.
+ @retval Unchanged Otherwise.
+
+**/
+CHAR16
+InternalShellCharToUpper (
+ IN CHAR16 Char
+ );
+
+/**
+ Verifies that the filename has .EFI on the end.
+
+ allocates a new buffer and copies the name (appending .EFI if necessary).
+ Caller to free the buffer.
+
+ @param[in] NameString original name string
+
+ @return the new filename with .efi as the extension.
+**/
+CHAR16 *
+GetExecuatableFileName (
+ IN CONST CHAR16 *NameString
+ )
+{
+ CHAR16 *Buffer;
+ CHAR16 *SuffixStr;
+ if (NameString == NULL) {
+ return (NULL);
+ }
+
+ //
+ // Fix the file name
+ //
+ if (StrnCmp(NameString+StrLen(NameString)-StrLen(L".efi"), L".efi", StrLen(L".efi"))==0) {
+ Buffer = AllocateCopyPool(StrSize(NameString), NameString);
+ } else if (StrnCmp(NameString+StrLen(NameString)-StrLen(L".man"), L".man", StrLen(L".man"))==0) {
+ Buffer = AllocateCopyPool(StrSize(NameString), NameString);
+ if (Buffer != NULL) {
+ SuffixStr = Buffer+StrLen(Buffer)-StrLen(L".man");
+ StrnCpyS (SuffixStr, StrSize(L".man")/sizeof(CHAR16), L".efi", StrLen(L".efi"));
+ }
+ } else {
+ Buffer = AllocateZeroPool(StrSize(NameString) + StrLen(L".efi")*sizeof(CHAR16));
+ if (Buffer != NULL) {
+ StrnCpyS( Buffer,
+ (StrSize(NameString) + StrLen(L".efi")*sizeof(CHAR16))/sizeof(CHAR16),
+ NameString,
+ StrLen(NameString)
+ );
+ StrnCatS( Buffer,
+ (StrSize(NameString) + StrLen(L".efi")*sizeof(CHAR16))/sizeof(CHAR16),
+ L".efi",
+ StrLen(L".efi")
+ );
+ }
+ }
+ return (Buffer);
+
+}
+
+/**
+ Verifies that the filename has .MAN on the end.
+
+ allocates a new buffer and copies the name (appending .MAN if necessary)
+
+ ASSERT if ManFileName is NULL
+
+ @param[in] ManFileName original filename
+
+ @return the new filename with .man as the extension.
+**/
+CHAR16 *
+GetManFileName(
+ IN CONST CHAR16 *ManFileName
+ )
+{
+ CHAR16 *Buffer;
+ if (ManFileName == NULL) {
+ return (NULL);
+ }
+ //
+ // Fix the file name
+ //
+ if (StrnCmp(ManFileName+StrLen(ManFileName)-4, L".man", 4)==0) {
+ Buffer = AllocateCopyPool(StrSize(ManFileName), ManFileName);
+ } else {
+ Buffer = AllocateZeroPool(StrSize(ManFileName) + 4*sizeof(CHAR16));
+ if (Buffer != NULL) {
+ StrnCpyS( Buffer,
+ (StrSize(ManFileName) + 4*sizeof(CHAR16))/sizeof(CHAR16),
+ ManFileName,
+ StrLen(ManFileName)
+ );
+ StrnCatS( Buffer,
+ (StrSize(ManFileName) + 4*sizeof(CHAR16))/sizeof(CHAR16),
+ L".man",
+ 4
+ );
+ }
+ }
+ return (Buffer);
+}
+
+/**
+ Search the path environment variable for possible locations and test for
+ which one contains a man file with the name specified. If a valid file is found
+ stop searching and return the (opened) SHELL_FILE_HANDLE for that file.
+
+ @param[in] FileName Name of the file to find and open.
+ @param[out] Handle Pointer to the handle of the found file. The
+ value of this is undefined for return values
+ except EFI_SUCCESS.
+
+ @retval EFI_SUCCESS The file was found. Handle is a valid SHELL_FILE_HANDLE
+ @retval EFI_INVALID_PARAMETER A parameter had an invalid value.
+ @retval EFI_NOT_FOUND The file was not found.
+**/
+EFI_STATUS
+SearchPathForFile(
+ IN CONST CHAR16 *FileName,
+ OUT SHELL_FILE_HANDLE *Handle
+ )
+{
+ CHAR16 *FullFileName;
+ EFI_STATUS Status;
+
+ if ( FileName == NULL
+ || Handle == NULL
+ || StrLen(FileName) == 0
+ ){
+ return (EFI_INVALID_PARAMETER);
+ }
+
+ FullFileName = ShellFindFilePath(FileName);
+ if (FullFileName == NULL) {
+ return (EFI_NOT_FOUND);
+ }
+
+ //
+ // now open that file
+ //
+ Status = EfiShellOpenFileByName(FullFileName, Handle, EFI_FILE_MODE_READ);
+ FreePool(FullFileName);
+
+ return (Status);
+}
+
+/**
+ parses through Buffer (which is MAN file formatted) and returns the
+ detailed help for any sub section specified in the comma seperated list of
+ sections provided. If the end of the file or a .TH section is found then
+ return.
+
+ Upon a sucessful return the caller is responsible to free the memory in *HelpText
+
+ @param[in] Buffer Buffer to read from
+ @param[in] Sections name of command's sub sections to find
+ @param[in] HelpText pointer to pointer to string where text goes.
+ @param[in] HelpSize pointer to size of allocated HelpText (may be updated)
+
+ @retval EFI_OUT_OF_RESOURCES a memory allocation failed.
+ @retval EFI_SUCCESS the section was found and its description sotred in
+ an alloceted buffer.
+**/
+EFI_STATUS
+ManBufferFindSections(
+ IN CONST CHAR16 *Buffer,
+ IN CONST CHAR16 *Sections,
+ IN CHAR16 **HelpText,
+ IN UINTN *HelpSize
+ )
+{
+ EFI_STATUS Status;
+ CONST CHAR16 *CurrentLocation;
+ BOOLEAN CurrentlyReading;
+ CHAR16 *SectionName;
+ UINTN SectionLen;
+ BOOLEAN Found;
+ CHAR16 *TempString;
+ CHAR16 *TempString2;
+
+ if ( Buffer == NULL
+ || HelpText == NULL
+ || HelpSize == NULL
+ ){
+ return (EFI_INVALID_PARAMETER);
+ }
+
+ Status = EFI_SUCCESS;
+ CurrentlyReading = FALSE;
+ Found = FALSE;
+
+ for (CurrentLocation = Buffer,TempString = NULL
+ ; CurrentLocation != NULL && *CurrentLocation != CHAR_NULL
+ ; CurrentLocation=StrStr(CurrentLocation, L"\r\n"),TempString = NULL
+ ){
+ while(CurrentLocation[0] == L'\r' || CurrentLocation[0] == L'\n') {
+ CurrentLocation++;
+ }
+ if (CurrentLocation[0] == L'#') {
+ //
+ // Skip comment lines
+ //
+ continue;
+ }
+ if (StrnCmp(CurrentLocation, L".TH", 3) == 0) {
+ //
+ // we hit the end of this commands section so stop.
+ //
+ break;
+ }
+ if (StrnCmp(CurrentLocation, L".SH ", 4) == 0) {
+ if (Sections == NULL) {
+ CurrentlyReading = TRUE;
+ continue;
+ } else if (CurrentlyReading) {
+ CurrentlyReading = FALSE;
+ }
+ CurrentLocation += 4;
+ //
+ // is this a section we want to read in?
+ //
+ if (StrLen(CurrentLocation)!=0) {
+ TempString2 = StrStr(CurrentLocation, L" ");
+ TempString2 = MIN(TempString2, StrStr(CurrentLocation, L"\r"));
+ TempString2 = MIN(TempString2, StrStr(CurrentLocation, L"\n"));
+ ASSERT(TempString == NULL);
+ TempString = StrnCatGrow(&TempString, NULL, CurrentLocation, TempString2==NULL?0:TempString2 - CurrentLocation);
+ if (TempString == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ break;
+ }
+ SectionName = TempString;
+ SectionLen = StrLen(SectionName);
+ SectionName = StrStr(Sections, SectionName);
+ if (SectionName == NULL) {
+ SHELL_FREE_NON_NULL(TempString);
+ continue;
+ }
+ if (*(SectionName + SectionLen) == CHAR_NULL || *(SectionName + SectionLen) == L',') {
+ CurrentlyReading = TRUE;
+ }
+ }
+ } else if (CurrentlyReading) {
+ Found = TRUE;
+ if (StrLen(CurrentLocation)!=0) {
+ TempString2 = StrStr(CurrentLocation, L"\r");
+ TempString2 = MIN(TempString2, StrStr(CurrentLocation, L"\n"));
+ ASSERT(TempString == NULL);
+ TempString = StrnCatGrow(&TempString, NULL, CurrentLocation, TempString2==NULL?0:TempString2 - CurrentLocation);
+ if (TempString == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ break;
+ }
+ //
+ // copy and save the current line.
+ //
+ ASSERT((*HelpText == NULL && *HelpSize == 0) || (*HelpText != NULL));
+ StrnCatGrow (HelpText, HelpSize, TempString, 0);
+ if (HelpText == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ break;
+ }
+ StrnCatGrow (HelpText, HelpSize, L"\r\n", 0);
+ if (HelpText == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ break;
+ }
+ }
+ }
+ SHELL_FREE_NON_NULL(TempString);
+ }
+ SHELL_FREE_NON_NULL(TempString);
+ if (!Found && !EFI_ERROR(Status)) {
+ return (EFI_NOT_FOUND);
+ }
+ return (Status);
+}
+
+/**
+ parses through the MAN file specified by SHELL_FILE_HANDLE and returns the
+ detailed help for any sub section specified in the comma seperated list of
+ sections provided. If the end of the file or a .TH section is found then
+ return.
+
+ Upon a sucessful return the caller is responsible to free the memory in *HelpText
+
+ @param[in] Handle FileHandle to read from
+ @param[in] Sections name of command's sub sections to find
+ @param[out] HelpText pointer to pointer to string where text goes.
+ @param[out] HelpSize pointer to size of allocated HelpText (may be updated)
+ @param[in] Ascii TRUE if the file is ASCII, FALSE otherwise.
+
+ @retval EFI_OUT_OF_RESOURCES a memory allocation failed.
+ @retval EFI_SUCCESS the section was found and its description sotred in
+ an alloceted buffer.
+**/
+EFI_STATUS
+ManFileFindSections(
+ IN SHELL_FILE_HANDLE Handle,
+ IN CONST CHAR16 *Sections,
+ OUT CHAR16 **HelpText,
+ OUT UINTN *HelpSize,
+ IN BOOLEAN Ascii
+ )
+{
+ EFI_STATUS Status;
+ CHAR16 *ReadLine;
+ UINTN Size;
+ BOOLEAN CurrentlyReading;
+ CHAR16 *SectionName;
+ UINTN SectionLen;
+ BOOLEAN Found;
+
+ if ( Handle == NULL
+ || HelpText == NULL
+ || HelpSize == NULL
+ ){
+ return (EFI_INVALID_PARAMETER);
+ }
+
+ Status = EFI_SUCCESS;
+ CurrentlyReading = FALSE;
+ Size = 1024;
+ Found = FALSE;
+
+ ReadLine = AllocateZeroPool(Size);
+ if (ReadLine == NULL) {
+ return (EFI_OUT_OF_RESOURCES);
+ }
+
+ for (;!ShellFileHandleEof(Handle);Size = 1024) {
+ Status = ShellFileHandleReadLine(Handle, ReadLine, &Size, TRUE, &Ascii);
+ if (ReadLine[0] == L'#') {
+ //
+ // Skip comment lines
+ //
+ continue;
+ }
+ //
+ // ignore too small of buffer...
+ //
+ if (Status == EFI_BUFFER_TOO_SMALL) {
+ Status = EFI_SUCCESS;
+ }
+ if (EFI_ERROR(Status)) {
+ break;
+ } else if (StrnCmp(ReadLine, L".TH", 3) == 0) {
+ //
+ // we hit the end of this commands section so stop.
+ //
+ break;
+ } else if (StrnCmp(ReadLine, L".SH", 3) == 0) {
+ if (Sections == NULL) {
+ CurrentlyReading = TRUE;
+ continue;
+ }
+ //
+ // we found a section
+ //
+ if (CurrentlyReading) {
+ CurrentlyReading = FALSE;
+ }
+ //
+ // is this a section we want to read in?
+ //
+ for ( SectionName = ReadLine + 3
+ ; *SectionName == L' '
+ ; SectionName++);
+ SectionLen = StrLen(SectionName);
+ SectionName = StrStr(Sections, SectionName);
+ if (SectionName == NULL) {
+ continue;
+ }
+ if (*(SectionName + SectionLen) == CHAR_NULL || *(SectionName + SectionLen) == L',') {
+ CurrentlyReading = TRUE;
+ }
+ } else if (CurrentlyReading) {
+ Found = TRUE;
+ //
+ // copy and save the current line.
+ //
+ ASSERT((*HelpText == NULL && *HelpSize == 0) || (*HelpText != NULL));
+ StrnCatGrow (HelpText, HelpSize, ReadLine, 0);
+ StrnCatGrow (HelpText, HelpSize, L"\r\n", 0);
+ }
+ }
+ FreePool(ReadLine);
+ if (!Found && !EFI_ERROR(Status)) {
+ return (EFI_NOT_FOUND);
+ }
+ return (Status);
+}
+
+/**
+ parses through the MAN file formatted Buffer and returns the
+ "Brief Description" for the .TH section as specified by Command. If the
+ command section is not found return EFI_NOT_FOUND.
+
+ Upon a sucessful return the caller is responsible to free the memory in *BriefDesc
+
+ @param[in] Buffer Buffer to read from
+ @param[in] Command name of command's section to find
+ @param[in] BriefDesc pointer to pointer to string where description goes.
+ @param[in] BriefSize pointer to size of allocated BriefDesc
+
+ @retval EFI_OUT_OF_RESOURCES a memory allocation failed.
+ @retval EFI_SUCCESS the section was found and its description sotred in
+ an alloceted buffer.
+**/
+EFI_STATUS
+ManBufferFindTitleSection(
+ IN CHAR16 **Buffer,
+ IN CONST CHAR16 *Command,
+ IN CHAR16 **BriefDesc,
+ IN UINTN *BriefSize
+ )
+{
+ EFI_STATUS Status;
+ CHAR16 *TitleString;
+ CHAR16 *TitleEnd;
+ CHAR16 *CurrentLocation;
+ UINTN TitleLength;
+ UINTN Start;
+ CONST CHAR16 StartString[] = L".TH ";
+ CONST CHAR16 EndString[] = L" 0 ";
+
+ if ( Buffer == NULL
+ || Command == NULL
+ || (BriefDesc != NULL && BriefSize == NULL)
+ ){
+ return (EFI_INVALID_PARAMETER);
+ }
+
+ Status = EFI_SUCCESS;
+
+ //
+ // Do not pass any leading path information that may be present to IsTitleHeader().
+ //
+ Start = StrLen(Command);
+ while ((Start != 0)
+ && (*(Command + Start - 1) != L'\\')
+ && (*(Command + Start - 1) != L'/')
+ && (*(Command + Start - 1) != L':')) {
+ --Start;
+ }
+
+ //
+ // more characters for StartString and EndString
+ //
+ TitleLength = StrSize(Command + Start) + (StrLen(StartString) + StrLen(EndString)) * sizeof(CHAR16);
+ TitleString = AllocateZeroPool(TitleLength);
+ if (TitleString == NULL) {
+ return (EFI_OUT_OF_RESOURCES);
+ }
+ StrCpyS(TitleString, TitleLength/sizeof(CHAR16), StartString);
+ StrCatS(TitleString, TitleLength/sizeof(CHAR16), Command + Start);
+ StrCatS(TitleString, TitleLength/sizeof(CHAR16), EndString);
+
+ CurrentLocation = StrStr(*Buffer, TitleString);
+ if (CurrentLocation == NULL){
+ Status = EFI_NOT_FOUND;
+ } else {
+ //
+ // we found it so copy out the rest of the line into BriefDesc
+ // After skipping any spaces or zeroes
+ //
+ for (CurrentLocation += StrLen(TitleString)
+ ; *CurrentLocation == L' ' || *CurrentLocation == L'0' || *CurrentLocation == L'1' || *CurrentLocation == L'\"'
+ ; CurrentLocation++);
+
+ TitleEnd = StrStr(CurrentLocation, L"\"");
+ if (TitleEnd == NULL) {
+ Status = EFI_DEVICE_ERROR;
+ } else {
+ if (BriefDesc != NULL) {
+ *BriefSize = StrSize(TitleEnd);
+ *BriefDesc = AllocateZeroPool(*BriefSize);
+ if (*BriefDesc == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ } else {
+ StrnCpyS(*BriefDesc, (*BriefSize)/sizeof(CHAR16), CurrentLocation, TitleEnd-CurrentLocation);
+ }
+ }
+
+ for (CurrentLocation = TitleEnd
+ ; *CurrentLocation != L'\n'
+ ; CurrentLocation++);
+ for (
+ ; *CurrentLocation == L' ' || *CurrentLocation == L'\n' || *CurrentLocation == L'\r'
+ ; CurrentLocation++);
+ *Buffer = CurrentLocation;
+ }
+ }
+
+ FreePool(TitleString);
+ return (Status);
+}
+
+/**
+ Parses a line from a MAN file to see if it is the Title Header. If it is, then
+ if the "Brief Description" is desired, allocate a buffer for it and return a
+ copy. Upon a sucessful return the caller is responsible to free the memory in
+ *BriefDesc
+
+ Uses a simple state machine that allows "unlimited" whitespace before and after the
+ ".TH", compares Command and the MAN file commnd name without respect to case, and
+ allows "unlimited" whitespace and '0' and '1' characters before the Short Description.
+ The PCRE regex describing this functionality is: ^\s*\.TH\s+(\S)\s[\s01]*(.*)$
+ where group 1 is the Command Name and group 2 is the Short Description.
+
+ @param[in] Command name of command whose MAN file we think Line came from
+ @param[in] Line Pointer to a line from the MAN file
+ @param[out] BriefDesc pointer to pointer to string where description goes.
+ @param[out] BriefSize pointer to size of allocated BriefDesc
+ @param[out] Found TRUE if the Title Header was found and it belongs to Command
+
+ @retval TRUE Line contained the Title Header
+ @retval FALSE Line did not contain the Title Header
+**/
+BOOLEAN
+IsTitleHeader(
+ IN CONST CHAR16 *Command,
+ IN CHAR16 *Line,
+ OUT CHAR16 **BriefDesc OPTIONAL,
+ OUT UINTN *BriefSize OPTIONAL,
+ OUT BOOLEAN *Found
+ )
+{
+ // The states of a simple state machine used to recognize a title header line
+ // and to extract the Short Description, if desired.
+ typedef enum {
+ LookForThMacro, LookForCommandName, CompareCommands, GetBriefDescription, Final
+ } STATEVALUES;
+
+ STATEVALUES State;
+ UINTN CommandIndex; // Indexes Command as we compare its chars to the MAN file.
+ BOOLEAN ReturnValue; // TRUE if this the Title Header line of *some* MAN file.
+ BOOLEAN ReturnFound; // TRUE if this the Title Header line of *the desired* MAN file.
+
+ ReturnValue = FALSE;
+ ReturnFound = FALSE;
+ CommandIndex = 0;
+ State = LookForThMacro;
+
+ do {
+
+ if (*Line == L'\0') {
+ break;
+ }
+
+ switch (State) {
+
+ // Handle "^\s*.TH\s"
+ // Go to state LookForCommandName if the title header macro is present; otherwise,
+ // eat white space. If we see something other than white space, this is not a
+ // title header line.
+ case LookForThMacro:
+ if (StrnCmp (L".TH ", Line, 4) == 0 || StrnCmp (L".TH\t", Line, 4) == 0) {
+ Line += 4;
+ State = LookForCommandName;
+ }
+ else if (*Line == L' ' || *Line == L'\t') {
+ Line++;
+ }
+ else {
+ State = Final;
+ }
+ break;
+
+ // Handle "\s*"
+ // Eat any "extra" whitespace after the title header macro (we have already seen
+ // at least one white space character). Go to state CompareCommands when a
+ // non-white space is seen.
+ case LookForCommandName:
+ if (*Line == L' ' || *Line == L'\t') {
+ Line++;
+ }
+ else {
+ ReturnValue = TRUE; // This is *some* command's title header line.
+ State = CompareCommands;
+ // Do not increment Line; it points to the first character of the command
+ // name on the title header line.
+ }
+ break;
+
+ // Handle "(\S)\s"
+ // Compare Command to the title header command name, ignoring case. When we
+ // reach the end of the command (i.e. we see white space), the next state
+ // depends on whether the caller wants a copy of the Brief Description.
+ case CompareCommands:
+ if (*Line == L' ' || *Line == L'\t') {
+ ReturnFound = TRUE; // This is the desired command's title header line.
+ State = (BriefDesc == NULL) ? Final : GetBriefDescription;
+ }
+ else if (InternalShellCharToUpper (*Line) != InternalShellCharToUpper (*(Command + CommandIndex++))) {
+ State = Final;
+ }
+ Line++;
+ break;
+
+ // Handle "[\s01]*(.*)$"
+ // Skip whitespace, '0', and '1' characters, if any, prior to the brief description.
+ // Return the description to the caller.
+ case GetBriefDescription:
+ if (*Line != L' ' && *Line != L'\t' && *Line != L'0' && *Line != L'1') {
+ *BriefSize = StrSize(Line);
+ *BriefDesc = AllocateZeroPool(*BriefSize);
+ if (*BriefDesc != NULL) {
+ StrCpyS(*BriefDesc, (*BriefSize)/sizeof(CHAR16), Line);
+ }
+ State = Final;
+ }
+ Line++;
+ break;
+
+ default:
+ break;
+ }
+
+ } while (State < Final);
+
+ *Found = ReturnFound;
+ return ReturnValue;
+}
+
+/**
+ parses through the MAN file specified by SHELL_FILE_HANDLE and returns the
+ "Brief Description" for the .TH section as specified by Command. If the
+ command section is not found return EFI_NOT_FOUND.
+
+ Upon a sucessful return the caller is responsible to free the memory in *BriefDesc
+
+ @param[in] Handle FileHandle to read from
+ @param[in] Command name of command's section to find as entered on the
+ command line (may be a relative or absolute path or
+ be in any case: upper, lower, or mixed in numerous ways!).
+ @param[out] BriefDesc pointer to pointer to string where description goes.
+ @param[out] BriefSize pointer to size of allocated BriefDesc
+ @param[in, out] Ascii TRUE if the file is ASCII, FALSE otherwise, will be
+ set if the file handle is at the 0 position.
+
+ @retval EFI_OUT_OF_RESOURCES a memory allocation failed.
+ @retval EFI_SUCCESS the section was found and its description stored in
+ an allocated buffer if requested.
+**/
+EFI_STATUS
+ManFileFindTitleSection(
+ IN SHELL_FILE_HANDLE Handle,
+ IN CONST CHAR16 *Command,
+ OUT CHAR16 **BriefDesc OPTIONAL,
+ OUT UINTN *BriefSize OPTIONAL,
+ IN OUT BOOLEAN *Ascii
+ )
+{
+ EFI_STATUS Status;
+ CHAR16 *ReadLine;
+ UINTN Size;
+ BOOLEAN Found;
+ UINTN Start;
+
+ if ( Handle == NULL
+ || Command == NULL
+ || (BriefDesc != NULL && BriefSize == NULL)
+ ){
+ return (EFI_INVALID_PARAMETER);
+ }
+
+ Status = EFI_SUCCESS;
+ Size = 1024;
+ Found = FALSE;
+
+ ReadLine = AllocateZeroPool(Size);
+ if (ReadLine == NULL) {
+ return (EFI_OUT_OF_RESOURCES);
+ }
+
+ //
+ // Do not pass any leading path information that may be present to IsTitleHeader().
+ //
+ Start = StrLen(Command);
+ while ((Start != 0)
+ && (*(Command + Start - 1) != L'\\')
+ && (*(Command + Start - 1) != L'/')
+ && (*(Command + Start - 1) != L':')) {
+ --Start;
+ }
+
+ for (;!ShellFileHandleEof(Handle);Size = 1024) {
+ Status = ShellFileHandleReadLine(Handle, ReadLine, &Size, TRUE, Ascii);
+ //
+ // ignore too small of buffer...
+ //
+ if (EFI_ERROR(Status) && Status != EFI_BUFFER_TOO_SMALL) {
+ break;
+ }
+
+ Status = EFI_NOT_FOUND;
+ if (IsTitleHeader (Command+Start, ReadLine, BriefDesc, BriefSize, &Found)) {
+ Status = Found ? EFI_SUCCESS : EFI_NOT_FOUND;
+ break;
+ }
+ }
+
+ FreePool(ReadLine);
+ 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
+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_HANDLE CmdFileImgHandle;
+ EFI_STATUS Status;
+ UINTN HelpSize;
+ UINTN BriefSize;
+ UINTN StringIdWalker;
+ BOOLEAN Ascii;
+ CHAR16 *TempString2;
+ CHAR16 *CmdFileName;
+ CHAR16 *CmdFilePathName;
+ CHAR16 *StringBuff;
+ EFI_DEVICE_PATH_PROTOCOL *FileDevPath;
+ EFI_DEVICE_PATH_PROTOCOL *DevPath;
+ EFI_HII_PACKAGE_LIST_HEADER *PackageListHeader;
+
+ if ( ManFileName == NULL
+ || Command == NULL
+ || HelpText == NULL
+ ){
+ return (EFI_INVALID_PARAMETER);
+ }
+
+ HelpSize = 0;
+ BriefSize = 0;
+ StringIdWalker = 0;
+ TempString = NULL;
+ Ascii = FALSE;
+ CmdFileName = NULL;
+ CmdFilePathName = NULL;
+ CmdFileImgHandle = NULL;
+ StringBuff = NULL;
+ PackageListHeader = NULL;
+ FileDevPath = NULL;
+ DevPath = NULL;
+
+ //
+ // 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 {
+ //
+ // If the image is a external app, check .MAN file first.
+ //
+ 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);
+ SHELL_FREE_NON_NULL(FileDevPath);
+ SHELL_FREE_NON_NULL(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);
+ if (!EFI_ERROR(Status)) {
+ //
+ // Get help text from .MAN file success.
+ //
+ goto Done;
+ }
+ }
+
+ //
+ // Load the app image to check EFI_HII_PACKAGE_LIST_PROTOCOL.
+ //
+ CmdFileName = GetExecuatableFileName(TempString);
+ if (CmdFileName == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Done;
+ }
+ //
+ // If the file in CWD then use the file name, else use the full
+ // path name.
+ //
+ CmdFilePathName = ShellFindFilePath(CmdFileName);
+ if (CmdFilePathName == NULL) {
+ Status = EFI_NOT_FOUND;
+ goto Done;
+ }
+ DevPath = ShellInfoObject.NewEfiShellProtocol->GetDevicePathFromFilePath(CmdFilePathName);
+ Status = gBS->LoadImage(FALSE, gImageHandle, DevPath, NULL, 0, &CmdFileImgHandle);
+ if(EFI_ERROR(Status)) {
+ *HelpText = NULL;
+ goto Done;
+ }
+ Status = gBS->OpenProtocol(
+ CmdFileImgHandle,
+ &gEfiHiiPackageListProtocolGuid,
+ (VOID**)&PackageListHeader,
+ gImageHandle,
+ NULL,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
+ );
+ if(EFI_ERROR(Status)) {
+ *HelpText = NULL;
+ goto Done;
+ }
+
+ //
+ // If get package list on image handle, install it on HiiDatabase.
+ //
+ Status = gBS->InstallProtocolInterface (
+ &mShellManDriverHandle,
+ &gEfiDevicePathProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &mShellManHiiDevicePath
+ );
+ if (EFI_ERROR(Status)) {
+ goto Done;
+ }
+
+ Status = gHiiDatabase->NewPackageList (
+ gHiiDatabase,
+ PackageListHeader,
+ mShellManDriverHandle,
+ &mShellManHiiHandle
+ );
+ if (EFI_ERROR (Status)) {
+ goto Done;
+ }
+
+ StringIdWalker = 1;
+ do {
+ SHELL_FREE_NON_NULL(StringBuff);
+ if (BriefDesc != NULL) {
+ SHELL_FREE_NON_NULL(*BriefDesc);
+ }
+ StringBuff = HiiGetString (mShellManHiiHandle, (EFI_STRING_ID)StringIdWalker, NULL);
+ if (StringBuff == NULL) {
+ Status = EFI_NOT_FOUND;
+ goto Done;
+ }
+ TempString2 = StringBuff;
+ Status = ManBufferFindTitleSection(&TempString2, Command, BriefDesc, &BriefSize);
+ if (!EFI_ERROR(Status) && HelpText != NULL){
+ Status = ManBufferFindSections(TempString2, Sections, HelpText, &HelpSize);
+ }
+ if (!EFI_ERROR(Status)){
+ //
+ // Found what we need and return
+ //
+ goto Done;
+ }
+
+ StringIdWalker += 1;
+ } while (StringIdWalker < 0xFFFF && StringBuff != NULL);
+
+ }
+
+Done:
+ if (mShellManDriverHandle != NULL) {
+ gBS->UninstallProtocolInterface (
+ mShellManDriverHandle,
+ &gEfiDevicePathProtocolGuid,
+ &mShellManHiiDevicePath
+ );
+ mShellManDriverHandle = NULL;
+ }
+
+ if (mShellManHiiHandle != NULL) {
+ HiiRemovePackages (mShellManHiiHandle);
+ mShellManHiiHandle = NULL;
+ }
+
+ if (CmdFileImgHandle != NULL) {
+ Status = gBS->UnloadImage (CmdFileImgHandle);
+ }
+
+ SHELL_FREE_NON_NULL(StringBuff);
+ SHELL_FREE_NON_NULL(TempString);
+ SHELL_FREE_NON_NULL(CmdFileName);
+ SHELL_FREE_NON_NULL(CmdFilePathName);
+ SHELL_FREE_NON_NULL(FileDevPath);
+ SHELL_FREE_NON_NULL(DevPath);
+
+ return (Status);
+}
+
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