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windows-xp/Source/XPSP1/NT/base/fs/utils/dfrg/exclude.cpp

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/*****************************************************************************************************************
FILENAME: Exclude.cpp
COPYRIGHT© 2001 Microsoft Corporation and Executive Software International, Inc.
DESCRIPTION: Handles exclusion of files.
*/
#include "stdafx.h"
#include<nt.h>
#include<ntrtl.h>
#include<nturtl.h>
#include <windows.h>
extern "C" {
#include "SysStruc.h"
}
#include "ErrMacro.h"
#include "DfrgCmn.h"
#include "DfrgEngn.h"
#include "DfrgNtfs.h" //Includes function prototype for CheckPagefileNameMatch which is the same in FAT.
#include "Alloc.h"
#include "GetReg.h"
#include "LoadFile.h"
#include "Exclude.h"
#include "Expand.h"
/*****************************************************************************************************************
COPYRIGHT© 2001 Microsoft Corporation and Executive Software International, Inc.
INPUT + OUTPUT:
IN cExcludeFile - The name of the file to check for exclusion.
OUT phExcludeList - Pointer to handle for memory to be alloced and filled with the list of excluded files.
GLOBALS:
None.
RETURN:
TRUE - Success.
FALSE - Fatal Error.
*/
BOOL
GetExcludeFile(
IN PTCHAR cExcludeFile,
OUT PHANDLE phExcludeList
)
{
HKEY hValue = NULL;
TCHAR cRegValue[MAX_PATH];
DWORD dwRegValueSize = sizeof(cRegValue);
DWORD dwExcludeFileSize = 0;
//0.0E00 Get the install path.
// todo NOTE: SFP will prevent us from using the system32 folder for this purpose!
EF(GetRegValue(&hValue,
TEXT("SOFTWARE\\Microsoft\\Dfrg"),
(PTCHAR)TEXT("PathName"),
cRegValue,
&dwRegValueSize) == ERROR_SUCCESS);
EF_ASSERT(RegCloseKey(hValue)==ERROR_SUCCESS);
//Translate any environment variables in the string.
EF_ASSERT(ExpandEnvVars(cRegValue));
//0.0E00 Print out the name of the exclude file.
lstrcat(cRegValue, TEXT("\\"));
lstrcat(cRegValue, cExcludeFile);
//0.0E00 Read the file into memory.
*phExcludeList = LoadFile((PTCHAR)cRegValue,
&dwExcludeFileSize,
FILE_SHARE_READ|FILE_SHARE_WRITE,
OPEN_EXISTING);
//0.0E00 Print out whether or not the file was loaded.
if(*phExcludeList != NULL) {
Message(TEXT("Loaded exclude file"), S_OK, cRegValue);
}
else {
Message(TEXT("No exclude file"), S_OK, cRegValue);
}
Message(TEXT(""), -1, NULL);
return TRUE;
}
/*****************************************************************************************************************
COPYRIGHT© 2001 Microsoft Corporation and Executive Software International, Inc.
ROUTINE DESCRIPTION:
Check to see if this file is excluded.
INPUT + OUTPUT:
IN VolData.cFileName - The name of the file which is excluded.
IN VolData.FileSystem - Which file system the drive is.
GLOBALS:
None.
RETURN:
TRUE - File is not excluded.
FALSE - File is excluded.
*/
BOOL
CheckFileForExclude(
IN CONST BOOL fAcceptNameOnly
)
{
PTCHAR pFileName = VolData.vFileName.GetBuffer();
PTCHAR pExcludeList = NULL;
PTCHAR pExcludeListEnd = NULL;
UINT ExcludeLength;
int i;
if (!pFileName) {
return FALSE;
}
if((VolData.FileSystem == FS_FAT || VolData.FileSystem == FS_FAT32) &&
(CompareString(LOCALE_INVARIANT,// locale identifier
NORM_IGNORECASE, // comparison-style options
TEXT("BOOTSECT.DOS"), // pointer to first string
-1, // null terminated first string
pFileName+3, // pointer to second string
-1) == 2)){ // null terminated second string
return FALSE;
}
// Look get the file name from after the last slash.
TCHAR *cFileName = wcsrchr(VolData.vFileName.GetBuffer(), L'\\');
if (fAcceptNameOnly) {
if (!cFileName) {
cFileName = pFileName;
}
}
else {
//If there was no path to extract, then bail.
EF_ASSERT(cFileName);
// start at first character after the last backslash
cFileName++;
}
//Check to see if this is a pagefile.
if(CheckPagefileNameMatch(cFileName, pPageFileNames)){
return FALSE;
}
//sks bug#200579 removed ShellIconCache from the list
// Do not move the file safeboot.fs
// Moving this file can cause desktop problems.
// Raffi - 20-Oct-1997 - added in Build V2.0.172
if (lstrlen(pFileName) >= lstrlen(TEXT("safeboot.fs"))) {
i = lstrlen(pFileName) - lstrlen(TEXT("safeboot.fs"));
if(CompareString(LOCALE_INVARIANT,// locale identifier
NORM_IGNORECASE, // comparison-style options
TEXT("safeboot.fs"), // pointer to first string
-1, // null terminated first string
pFileName+i, // pointer to second string
-1) == 2){ // null terminated second string
Message(TEXT("Excluding safeboot.fs"), -1, pFileName);
return FALSE;
}
}
// Do not move the file safeboot.csv
// Moving this file can cause desktop problems.
// Raffi - 20-Oct-1997 - added in Build V2.0.172
if (lstrlen(pFileName) >= lstrlen(TEXT("safeboot.csv"))) {
i = lstrlen(pFileName) - lstrlen(TEXT("safeboot.csv"));
if(CompareString(LOCALE_INVARIANT,// locale identifier
NORM_IGNORECASE, // comparison-style options
TEXT("safeboot.csv"), // pointer to first string
-1, // null terminated first string
pFileName+i, // pointer to second string
-1) == 2){ // null terminated second string
Message(TEXT("Excluding safeboot.csv"), -1, pFileName);
return FALSE;
}
}
// Do not move the file safeboot.rsv
// Moving this file can cause desktop problems.
// Raffi - 20-Oct-1997 - added in Build V2.0.172
if (lstrlen(pFileName) >= lstrlen(TEXT("safeboot.rsv"))) {
i = lstrlen(pFileName) - lstrlen(TEXT("safeboot.rsv"));
if(CompareString(LOCALE_INVARIANT,// locale identifier
NORM_IGNORECASE, // comparison-style options
TEXT("safeboot.rsv"), // pointer to first string
-1, // null terminated first string
pFileName+i, // pointer to second string
-1) == 2){ // null terminated second string
Message(TEXT("Excluding safeboot.rsv"), -1, pFileName);
return FALSE;
}
}
// Do not move the file hiberfil.sys
// Moving this file can cause problems.
if (lstrlen(pFileName) >= lstrlen(TEXT("hiberfil.sys"))) {
i = lstrlen(pFileName) - lstrlen(TEXT("hiberfil.sys"));
if(CompareString(LOCALE_INVARIANT,// locale identifier
NORM_IGNORECASE, // comparison-style options
TEXT("hiberfil.sys"), // pointer to first string
-1, // null terminated first string
pFileName+i, // pointer to second string
-1) == 2){ // null terminated second string
Message(TEXT("Excluding hiberfil.sys"), -1, pFileName);
return FALSE;
}
}
// Do not move the file memory.dmp
// Moving this file can cause problems.
if (lstrlen(pFileName) >= lstrlen(TEXT("memory.dmp"))) {
i = lstrlen(pFileName) - lstrlen(TEXT("memory.dmp"));
if(CompareString(LOCALE_INVARIANT,// locale identifier
NORM_IGNORECASE, // comparison-style options
TEXT("memory.dmp"), // pointer to first string
-1, // null terminated first string
pFileName+i, // pointer to second string
-1) == 2){ // null terminated second string
Message(TEXT("Excluding memory.dmp"), -1, pFileName);
return FALSE;
}
}
//0.0E00 No Match
if(VolData.hExcludeList == NULL){
return TRUE;
}
BOOL bReturnValue;
__try{
//0.0E00 Lock the memory and get pointer to the memory
pExcludeList = (PTCHAR) GlobalLock(VolData.hExcludeList);
if (pExcludeList == (PTCHAR) NULL){
EH_ASSERT(FALSE);
bReturnValue = FALSE;
__leave;
}
//0.0E00 Get the pointer to the end of the exclude list
pExcludeListEnd = pExcludeList + GlobalSize(VolData.hExcludeList);
//0.0E00 Loop until match or end of Exclude List
while (pExcludeList < pExcludeListEnd){
ExcludeLength = lstrlen(pExcludeList);
//
// if(CompareString(LOCALE_INVARIANT, // locale identifier
// NORM_IGNORECASE, // comparison-style options
// pExcludeList, // pointer to first string
// ExcludeLength, // size, in bytes or characters, of first string
// pFileName, // pointer to second string
// ExcludeLength) == 2){ // size, in bytes or characters, of second string
//
// //0.0E00 If there is a match then this file should be excluded.
// if((lstrlen(pFileName) == (int)ExcludeLength) || (pFileName[ExcludeLength] == TEXT('\\'))){
// //0.0E00 Exclude the file.
// Message(TEXT("Excluding File."), -1, pFileName);
// return FALSE;
// }
// }
// Check to see if it is a wild string type of exclusion *RA*
// It is not case sensitive
if (lStrWildCmp(pFileName, pExcludeList, FALSE)) {
//0.0E00 Exclude the file.
Message(TEXT("Excluding File."), -1, pFileName);
bReturnValue = FALSE;
__leave;
}
//0.0E00 Set pointer to next record
pExcludeList += ExcludeLength + 2;
}
//0.0E00 No Match
bReturnValue = TRUE;
}
__finally {
if (pExcludeList) {
GlobalUnlock(VolData.hExcludeList);
}
}
return bReturnValue;
}
/*****************************************************************************************************************
COPYRIGHT© 2001 Microsoft Corporation and Executive Software International, Inc.
ROUTINE DESCRIPTION:
This routine does a wild string comparison of a given Source string and a Pattern string that
may contain wild string characters (*, ?).
INPUT:
pOrigSourceString - Pointer to null terminated Source String to check for pattern match on.
pOrigPatternString - Pointer to null terminated string containing the match pattern.
bCaseType - TRUE=Case Sensitive comparison, FALSE=Non-Case Sensitive comparison
RETURN:
Success - TRUE - It was a match.
Failure - FALSE - It was NOT a match.
*/
BOOL
lStrWildCmp (
IN PTCHAR pOrigSourceString,
IN PTCHAR pOrigPatternString,
IN BOOL bCaseType
)
{
TCHAR cSource[500]; // Local copy of Source String
TCHAR cPattern[500]; // Local copy of Match Pattern String
PTCHAR pSource; // Pointer into our local Source String
PTCHAR pPattern; // Pointer into our local Match Pattern String
PTCHAR pEndPattern; // Pointer to the end of our local Match Pattern String
DWORD dwCompareFlag=0; // Flag used in CompareString function
BOOL bMatchFound;
int nchars; // Number of characters in pattern section that we are checking against.
int lastn; // Indicates if last char was or was not, a cWildn (0=No, 1=Yes)
// Define some characters we use
TCHAR cWildn = {'*'};
TCHAR cWild1 = {'?'};
TCHAR cEndstr = {'\0'};
PTCHAR cStopset = TEXT("*?\0"); // note order is cWildn/cWild1
// Verify that a valid Source and Pattern string was passed in. If not, return failure status.
if ((pOrigPatternString == NULL) || (lstrlen(pOrigPatternString) == 0)) {
return FALSE;
}
if ((pOrigSourceString == NULL) || (lstrlen(pOrigSourceString) == 0)) {
return FALSE;
}
// Check for the simple case of No wildcards in the pattern.
#ifndef UNICODE
if ((strchr(pOrigPatternString, cWildn) == NULL) &&
(strchr(pOrigPatternString, cWild1) == NULL)) {
#else
if ((wcschr(pOrigPatternString, cWildn) == NULL) &&
(wcschr(pOrigPatternString, cWild1) == NULL)) {
#endif
// This is a simple case of a 'straight' string comparison
// If the lengths do not equal, then the strings do not equal.
if (lstrlen(pOrigSourceString) != lstrlen(pOrigPatternString)) {
// No Match
return FALSE;
}
else {
// Set up CompareString flag for No Case-sensitive checking if selected
if (bCaseType == FALSE) { dwCompareFlag = NORM_IGNORECASE; }
if(!lstrcmpi(pOrigSourceString, pOrigPatternString)){
// WRITE A REAL SHELL FOR COMPARESTRING!
// Compare strings
// if ((CompareString(LOCALE_INVARIANT,
// dwCompareFlag,
// pOrigSourceString,
// lstrlen(pOrigSourceString),
// pOrigPatternString,
// lstrlen(pOrigPatternString)
// )) == 2) {
// Match found
return TRUE;
}
else {
// No Match found
return FALSE;
}
}
}
// There was wildcard(s) in the match pattern, so it is a more complex check
//
// Set up data for wildcard comparisons.
//
// Reset indicator that last char was not a cWildn(*) character
lastn = 0;
// Make our own local copies of the strings
if (lstrcpy(cPattern, pOrigPatternString) == NULL) { return FALSE;}
if (lstrcpy(cSource, pOrigSourceString) == NULL) { return FALSE;}
// If Not case-sensitive check, then make both strings upper case
if (bCaseType == FALSE) {
CharUpper(cPattern);
CharUpper(cSource);
//#ifndef UNICODE
// strupr(cPattern);
// strupr(cSource);
//#else
// wcsupr(cPattern);
// wcsupr(cSource);
//#endif
}
// Set up pointers to strings
pSource = cSource;
pPattern = cPattern;
pEndPattern = pPattern + (lstrlen(cPattern) * sizeof(TCHAR));
// This section of the code will take the pattern string and extract each pattern section, where a
// string sections is seperated by one of the following:
//
// a) The start of the string
// b) The end of the string (0 termination)
// c) A wildcard character (* or ?)
//
// For each pattern section, it will then try to find a match in the source string. If a match is found, then
// the next pattern section is extracted and the next match check is made on the source string, starting at
// the source string location where the last match was found.
//
// There are several types of pattern sections to consider
// 1) *nnn* - Section with '*' on both ends. This means that the match be anywhere in the source string.
// 2) nnn* - '*' just at the section end, so the string must match starting at the current source string
// location.
// 3) *nnn - '*' just at the section start, so just the end of the source string is checked. For example,
// *.dat
// 4) ? - For single character wildcards, we just skip the next character in the source string to check.
//
//
while (pPattern <= pEndPattern) {
switch (*pPattern) {
// Case 1: Next pattern char is cWildn (*) character
// Indicate that last character was cWildn and continue on with check
case '*' : {
pPattern = pPattern + 1;
lastn = 1;
break;
} // End Case 1
// Case 2: Next pattern char is cWild1 (?) character
case '?' : {
// Check where we are in the source string
if (*pSource != cEndstr) {
// We are not at the end, so we know the next character is the Source String will be
// a match, so just increment to the next character and continue on with check.
pSource = pSource + 1;
pPattern = pPattern + 1;
lastn = 0;
break;
}
else {
// We are at the end of the Source string, so NO Match found
return FALSE;
}
} // End Case 2
// Case 3: End of the pattern string reached
case '\0' : {
// If we are also at the end of the Source string, then all done with a Match found
if (*pSource == cEndstr) {
return TRUE;
}
else {
// If the last character was a '*', then all done with a Match found
if (lastn == 1) {
return TRUE;
}
// If the last character was NOT a '*', then all done with NO Match found
else {
return FALSE;
}
}
} // End Case 3
// Case 4: Anything else (NON wild or terminating character), we get
// the next pattern section to check against the source string.
default : {
// Get number of character in next pattern section
#ifndef UNICODE
nchars = strcspn(pPattern, cStopset);
#else
nchars = wcscspn(pPattern, cStopset);
#endif
// If the last character was Not a cWildn (*), then just
// check the pattern section starting at the current point in the source string.
if (lastn == 0) {
// If a match found, then reset pattern and source pointers for the next sections to
// check against and start search for next section.
#ifndef UNICODE
if (strncmp(pPattern, pSource, nchars) == 0) {
#else
if (wcsncmp(pPattern, pSource, nchars) == 0) {
#endif
pPattern = pPattern + nchars;
pSource = pSource + nchars;
break;
}
else {
// NO Match found, return back failure status
return FALSE;
}
}
// The last character was a cWildn (*), but we need to see if
// the string ends the pattern and check that as a special case
// Check for special case of the last pattern section
if (nchars == (int)lstrlen(pPattern)) {
// For the last pattern section case, if the length of the pattern section is greater
// than the source string section to check against, then there cannot be a match.
if ((int)lstrlen(pSource) < nchars) {
return FALSE;
}
// For the last pattern section case, we just need to compare to the end section of the
// source string, adjust the source string pointer to this location (= 'cEndstr'-nchars),
// and go continue checking.
pSource = pSource + (lstrlen(pSource) - nchars);
lastn = 0;
break;
}
// It was not the special case, so since the last char was a cWildn (*), the match could be anywhere.
// So, we start checking at the current Source string location for a match with the pattern section.
// Note: If No Match is found, then it falls out of this loop.
bMatchFound = FALSE;
while (*pSource != cEndstr) {
// If a match found, then reset pattern and source pointers for the next sections to
// check against and start search for next section.
#ifndef UNICODE
if (strncmp(pPattern, pSource, nchars) == 0) {
#else
if (wcsncmp(pPattern, pSource, nchars) == 0) {
#endif
pPattern = pPattern + nchars;
pSource = pSource + nchars;
lastn = 0;
bMatchFound = TRUE;
break;
}
else {
pSource = pSource + 1;
}
}
// If no match found, then return back failure status
if (!bMatchFound) {
return FALSE;
}
// else a match was found, so go check next pattern section
break;
} // End Case 4
} // End Switch
} // End While
// It should never fall out of the while loop, because the checks within the loop should catch
// when processing is completed, but just in case, it will fail if it comes out of the loop.
return FALSE;
}