[ion] 54646: [RTL]: Implement, and export, RtlDosSearchPath_Ustr as well as RtlGetFullPathName_UstrEx. RtlGetFullPathName_U is still old code but it seems good enough for now, and isn't the next ta...
Author: ion Date: Wed Dec 14 03:55:54 2011 New Revision: 54646
URL: http://svn.reactos.org/svn/reactos?rev=54646&view=rev Log: [RTL]: Implement, and export, RtlDosSearchPath_Ustr as well as RtlGetFullPathName_UstrEx. RtlGetFullPathName_U is still old code but it seems good enough for now, and isn't the next target. Nothing calls this code yet (SearchPathW soon will), this is just an implementation commit. Code was tested to boot to 3rd stage after SearchPath modification, which is the next target (step 2). After which, the only code in the loader paths that uses legacy path APIs will be the create process path, the third and final step.
Modified: trunk/reactos/dll/ntdll/def/ntdll.pspec trunk/reactos/dll/ntdll/def/ntdll.spec trunk/reactos/include/ndk/rtlfuncs.h trunk/reactos/lib/rtl/path.c
Modified: trunk/reactos/dll/ntdll/def/ntdll.pspec URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/ntdll/def/ntdll.pspec?r... ============================================================================== --- trunk/reactos/dll/ntdll/def/ntdll.pspec [iso-8859-1] (original) +++ trunk/reactos/dll/ntdll/def/ntdll.pspec [iso-8859-1] Wed Dec 14 03:55:54 2011 @@ -574,7 +574,7 @@ @ stdcall RtlDosPathNameToRelativeNtPathName_U(ptr ptr ptr ptr) // CHECKME //@ stdcall RtlDosPathNameToRelativeNtPathName_U_WithStatus @ stdcall RtlDosSearchPath_U(wstr wstr wstr long ptr ptr) -//@ stdcall RtlDosSearchPath_Ustr +@ stdcall RtlDosSearchPath_Ustr(long ptr ptr ptr ptr ptr ptr ptr ptr) @ stdcall RtlDowncaseUnicodeChar(long) @ stdcall RtlDowncaseUnicodeString(ptr ptr long) @ stdcall RtlDumpResource(ptr) @@ -664,7 +664,7 @@ @ stdcall RtlGetFirstRange(ptr ptr ptr) //@ stdcall RtlGetFrame @ stdcall RtlGetFullPathName_U(wstr long ptr ptr) -//@ stdcall RtlGetFullPathName_UstrEx +@ stdcall RtlGetFullPathName_UstrEx(ptr ptr ptr ptr ptr ptr ptr ptr) @ stdcall RtlGetGroupSecurityDescriptor(ptr ptr ptr) @ stdcall RtlGetLastNtStatus() @ stdcall RtlGetLastWin32Error()
Modified: trunk/reactos/dll/ntdll/def/ntdll.spec URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/ntdll/def/ntdll.spec?re... ============================================================================== --- trunk/reactos/dll/ntdll/def/ntdll.spec [iso-8859-1] (original) +++ trunk/reactos/dll/ntdll/def/ntdll.spec [iso-8859-1] Wed Dec 14 03:55:54 2011 @@ -572,7 +572,7 @@ @ stdcall RtlDosPathNameToRelativeNtPathName_U(ptr ptr ptr ptr) ; CHECKME ;@ stdcall RtlDosPathNameToRelativeNtPathName_U_WithStatus @ stdcall RtlDosSearchPath_U(wstr wstr wstr long ptr ptr) -;@ stdcall RtlDosSearchPath_Ustr +@ stdcall RtlDosSearchPath_Ustr(long ptr ptr ptr ptr ptr ptr ptr ptr) @ stdcall RtlDowncaseUnicodeChar(long) @ stdcall RtlDowncaseUnicodeString(ptr ptr long) @ stdcall RtlDumpResource(ptr) @@ -662,7 +662,7 @@ @ stdcall RtlGetFirstRange(ptr ptr ptr) ;@ stdcall RtlGetFrame @ stdcall RtlGetFullPathName_U(wstr long ptr ptr) -;@ stdcall RtlGetFullPathName_UstrEx +@ stdcall RtlGetFullPathName_UstrEx(ptr ptr ptr ptr ptr ptr ptr ptr) @ stdcall RtlGetGroupSecurityDescriptor(ptr ptr ptr) @ stdcall RtlGetLastNtStatus() @ stdcall RtlGetLastWin32Error()
Modified: trunk/reactos/include/ndk/rtlfuncs.h URL: http://svn.reactos.org/svn/reactos/trunk/reactos/include/ndk/rtlfuncs.h?rev=... ============================================================================== --- trunk/reactos/include/ndk/rtlfuncs.h [iso-8859-1] (original) +++ trunk/reactos/include/ndk/rtlfuncs.h [iso-8859-1] Wed Dec 14 03:55:54 2011 @@ -2481,6 +2481,20 @@ IN ULONG BufferSize, OUT PWSTR Buffer, OUT PWSTR *PartName +); + +ULONG +NTAPI +RtlDosSearchPath_Ustr( + IN ULONG Flags, + IN PUNICODE_STRING PathString, + IN PUNICODE_STRING FileNameString, + IN PUNICODE_STRING ExtensionString, + IN PUNICODE_STRING CallerBuffer, + IN OUT PUNICODE_STRING DynamicString OPTIONAL, + OUT PUNICODE_STRING* FullNameOut OPTIONAL, + OUT PULONG FilePartSize OPTIONAL, + OUT PULONG LengthNeeded OPTIONAL );
NTSYSAPI
Modified: trunk/reactos/lib/rtl/path.c URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/path.c?rev=54646&am... ============================================================================== --- trunk/reactos/lib/rtl/path.c [iso-8859-1] (original) +++ trunk/reactos/lib/rtl/path.c [iso-8859-1] Wed Dec 14 03:55:54 2011 @@ -890,7 +890,7 @@ Length = CurDir->DosPath.Length / sizeof(WCHAR); ASSERT((CurDirName != NULL) && (Length > 0));
- /* + /* * DosPath.Buffer should always have a trailing slash. There is an assert * below which checks for this. * @@ -1615,6 +1615,725 @@ /* * @implemented */ +ULONG +NTAPI +RtlGetFullPathName_UstrEx(IN PUNICODE_STRING FileName, + IN PUNICODE_STRING StaticString, + IN PUNICODE_STRING DynamicString, + IN PUNICODE_STRING *StringUsed, + IN PSIZE_T FilePartSize, + OUT PBOOLEAN NameInvalid, + OUT RTL_PATH_TYPE* PathType, + OUT PULONG LengthNeeded) +{ + NTSTATUS Status; + PWCHAR StaticBuffer; + PCWCH ShortName; + ULONG Length; + USHORT StaticLength; + UNICODE_STRING TempDynamicString; + + /* Initialize all our locals */ + ShortName = NULL; + StaticBuffer = NULL; + TempDynamicString.Buffer = NULL; + + /* Initialize the input parameters */ + if (StringUsed) *StringUsed = NULL; + if (LengthNeeded) *LengthNeeded = 0; + if (FilePartSize) *FilePartSize = 0; + + /* Check for invalid parameters */ + if ((DynamicString) && !(StringUsed) && (StaticString)) + { + return STATUS_INVALID_PARAMETER; + } + + /* Check if we did not get an input string */ + if (!StaticString) + { + /* Allocate one */ + StaticLength = MAX_PATH * sizeof(WCHAR); + StaticBuffer = RtlpAllocateStringMemory(MAX_PATH * sizeof(WCHAR), TAG_USTR); + if (!StaticBuffer) return STATUS_NO_MEMORY; + } + else + { + /* Use the one we received */ + StaticBuffer = StaticString->Buffer; + StaticLength = StaticString->MaximumLength; + } + + /* Call the lower-level function */ + Length = RtlGetFullPathName_Ustr(FileName, + StaticLength, + StaticBuffer, + &ShortName, + NameInvalid, + PathType); + DPRINT("Length: %d StaticBuffer: %S\n", Length, StaticBuffer); + if (!Length) + { + /* Fail if it failed */ + DbgPrint("%s(%d) - RtlGetFullPathName_Ustr() returned 0\n", + __FUNCTION__, + __LINE__); + Status = STATUS_OBJECT_NAME_INVALID; + goto Quickie; + } + + /* Check if it fits inside our static string */ + if ((StaticString) && (Length < StaticLength)) + { + /* Set the final length */ + StaticString->Length = Length; + + /* Set the file part size */ + if (FilePartSize) *FilePartSize = ShortName ? (ShortName - StaticString->Buffer) : 0; + + /* Return the static string if requested */ + if (StringUsed) *StringUsed = StaticString; + + /* We are done with success */ + Status = STATUS_SUCCESS; + goto Quickie; + } + + /* Did we not have an input dynamic string ?*/ + if (!DynamicString) + { + /* Return the length we need */ + if (LengthNeeded) *LengthNeeded = Length; + + /* And fail such that the caller can try again */ + Status = STATUS_BUFFER_TOO_SMALL; + goto Quickie; + } + + /* Check if it fits in our static buffer */ + if ((StaticBuffer) && (Length < StaticLength)) + { + /* NULL-terminate it */ + StaticBuffer[Length / sizeof(WCHAR)] = UNICODE_NULL; + + /* Set the settings for the dynamic string the caller sent */ + DynamicString->MaximumLength = StaticLength; + DynamicString->Length = Length; + DynamicString->Buffer = StaticBuffer; + + /* Set the part size */ + if (FilePartSize) *FilePartSize = ShortName ? (ShortName - StaticBuffer) : 0; + + /* Return the dynamic string if requested */ + if (StringUsed) *StringUsed = DynamicString; + + /* Do not free the static buffer on exit, and return success */ + StaticBuffer = NULL; + Status = STATUS_SUCCESS; + goto Quickie; + } + + /* Now try again under the PEB lock */ + RtlAcquirePebLock(); + Length = RtlGetFullPathName_Ustr(FileName, + StaticLength, + StaticBuffer, + &ShortName, + NameInvalid, + PathType); + if (!Length) + { + /* It failed */ + DbgPrint("%s line %d: RtlGetFullPathName_Ustr() returned 0\n", + __FUNCTION__, __LINE__); + Status = STATUS_OBJECT_NAME_INVALID; + goto Release; + } + + /* Check if it fits inside our static string now */ + if ((StaticString) && (Length < StaticLength)) + { + /* Set the final length */ + StaticString->Length = Length; + + /* Set the file part size */ + if (FilePartSize) *FilePartSize = ShortName ? (ShortName - StaticString->Buffer) : 0; + + /* Return the static string if requested */ + if (StringUsed) *StringUsed = StaticString; + + /* We are done with success */ + Status = STATUS_SUCCESS; + goto Release; + } + + /* Check if the path won't even fit in a real string */ + if ((Length + sizeof(WCHAR)) > UNICODE_STRING_MAX_BYTES) + { + /* Name is way too long, fail */ + Status = STATUS_NAME_TOO_LONG; + goto Release; + } + + /* Allocate the string to hold the path name now */ + TempDynamicString.Buffer = RtlpAllocateStringMemory(Length + sizeof(WCHAR), + TAG_USTR); + if (!TempDynamicString.Buffer) + { + /* Out of memory, fail */ + Status = STATUS_NO_MEMORY; + goto Release; + } + + /* Add space for a NULL terminator, and now check the full path */ + TempDynamicString.MaximumLength = Length + sizeof(UNICODE_NULL); + Length = RtlGetFullPathName_Ustr(FileName, + Length, + TempDynamicString.Buffer, + &ShortName, + NameInvalid, + PathType); + if (!Length) + { + /* Some path error, so fail out */ + DbgPrint("%s line %d: RtlGetFullPathName_Ustr() returned 0\n", + __FUNCTION__, __LINE__); + Status = STATUS_OBJECT_NAME_INVALID; + goto Release; + } + + /* It should fit in the string we just allocated */ + ASSERT(Length < (TempDynamicString.MaximumLength - sizeof(WCHAR))); + if (Length > TempDynamicString.MaximumLength) + { + /* This is really weird and would mean some kind of race */ + Status = STATUS_INTERNAL_ERROR; + goto Release; + } + + /* Return the file part size */ + if (FilePartSize) *FilePartSize = ShortName ? (ShortName - TempDynamicString.Buffer) : 0; + + /* Terminate the whole string now */ + TempDynamicString.Buffer[Length / sizeof(WCHAR)] = UNICODE_NULL; + + /* Finalize the string and return it to the user */ + DynamicString->Buffer = TempDynamicString.Buffer; + DynamicString->Length = Length; + DynamicString->MaximumLength = TempDynamicString.MaximumLength; + if (StringUsed) *StringUsed = DynamicString; + + /* Return success and make sure we don't free the buffer on exit */ + TempDynamicString.Buffer = NULL; + Status = STATUS_SUCCESS; + +Release: + /* Release the PEB lock */ + RtlReleasePebLock(); + +Quickie: + /* Free any buffers we should be freeing */ + DPRINT("Status: %lx %S %S\n", Status, StaticBuffer, TempDynamicString.Buffer); + if ((StaticBuffer) && (StaticBuffer != StaticString->Buffer)) + { + RtlpFreeMemory(StaticBuffer, TAG_USTR); + } + if (TempDynamicString.Buffer) + { + RtlpFreeMemory(TempDynamicString.Buffer, TAG_USTR); + } + + /* Print out any unusual errors */ + if ((NT_ERROR(Status)) && + (Status != STATUS_NO_SUCH_FILE) && (Status != STATUS_BUFFER_TOO_SMALL)) + { + DbgPrint("RTL: %s - failing on filename %wZ with status %08lx\n", + __FUNCTION__, FileName, Status); + } + + /* Return, we're all done */ + return Status; +} + +/* + * @implemented + */ +ULONG +NTAPI +RtlDosSearchPath_Ustr(IN ULONG Flags, + IN PUNICODE_STRING PathString, + IN PUNICODE_STRING FileNameString, + IN PUNICODE_STRING ExtensionString, + IN PUNICODE_STRING CallerBuffer, + IN OUT PUNICODE_STRING DynamicString OPTIONAL, + OUT PUNICODE_STRING* FullNameOut OPTIONAL, + OUT PULONG FilePartSize OPTIONAL, + OUT PULONG LengthNeeded OPTIONAL) +{ + WCHAR StaticCandidateBuffer[MAX_PATH]; + UNICODE_STRING StaticCandidateString; + NTSTATUS Status; + RTL_PATH_TYPE PathType; + PWCHAR p, End, CandidateEnd, SegmentEnd; + ULONG SegmentSize, NamePlusExtLength, PathSize, MaxPathSize = 0, WorstCaseLength, ByteCount; + USHORT ExtensionLength = 0; + PUNICODE_STRING FullIsolatedPath; + DPRINT("DOS Path Search: %lx %wZ %wZ %wZ %wZ %wZ\n", + Flags, PathString, FileNameString, ExtensionString, CallerBuffer, DynamicString); + + /* Initialize the input string */ + RtlInitEmptyUnicodeString(&StaticCandidateString, + StaticCandidateBuffer, + sizeof(StaticCandidateBuffer)); + + /* Initialize optional arguments */ + if (FullNameOut) *FullNameOut = NULL; + if (FilePartSize) *FilePartSize = 0; + if (DynamicString) + { + DynamicString->Length = DynamicString->MaximumLength = 0; + DynamicString->Buffer = NULL; + } + + /* Check for invalid parameters */ + if ((Flags & ~7) || + !(PathString) || + !(FileNameString) || + ((CallerBuffer) && (DynamicString) && !(FullNameOut))) + { + /* Fail */ + DbgPrint("%s: Invalid parameters passed\n", __FUNCTION__); + Status = STATUS_INVALID_PARAMETER; + goto Quickie; + } + + /* First check what kind of path this is */ + PathType = RtlDetermineDosPathNameType_Ustr(FileNameString); + + /* Check if the caller wants to prevent relative .\ and ..\ paths */ + if ((Flags & 2) && + (PathType == RtlPathTypeRelative) && + (FileNameString->Length >= (2 * sizeof(WCHAR))) && + (FileNameString->Buffer[0] == L'.') && + ((IS_PATH_SEPARATOR(FileNameString->Buffer[1])) || + ((FileNameString->Buffer[1] == L'.') && + ((FileNameString->Length >= (3 * sizeof(WCHAR))) && + (IS_PATH_SEPARATOR(FileNameString->Buffer[2])))))) + { + /* Yes, and this path is like that, so make it seem unknown */ + PathType = RtlPathTypeUnknown; + } + + /* Now check relative vs non-relative paths */ + if (PathType == RtlPathTypeRelative) + { + /* Does the caller want SxS? */ + if (Flags & 1) + { + /* Apply the SxS magic */ + FullIsolatedPath = NULL; + Status = RtlDosApplyFileIsolationRedirection_Ustr(TRUE, + FileNameString, + ExtensionString, + CallerBuffer, + DynamicString, + &FullIsolatedPath, + NULL, + FilePartSize, + LengthNeeded); + if (NT_SUCCESS(Status)) + { + /* We found the SxS path, return it */ + if (FullNameOut) *FullNameOut = FullIsolatedPath; + goto Quickie; + } + else if (Status != STATUS_SXS_KEY_NOT_FOUND) + { + /* Critical SxS error, fail */ + DbgPrint("%s: Failing because call to " + "RtlDosApplyIsolationRedirection_Ustr(%wZ) failed with " + "status 0x%08lx\n", + __FUNCTION__, + FileNameString, + Status); + goto Quickie; + } + } + + /* No SxS key found, or not requested, check if there's an extension */ + if (ExtensionString) + { + /* Save the extension length, and check if there's a file name */ + ExtensionLength = ExtensionString->Length; + if (FileNameString->Length) + { + /* Start parsing the file name */ + End = &FileNameString->Buffer[FileNameString->Length / sizeof(WCHAR)]; + while (End > FileNameString->Buffer) + { + /* If we find a path separator, there's no extension */ + if (IS_PATH_SEPARATOR(*--End)) break; + + /* Otherwise, did we find an extension dot? */ + if (*End == L'.') + { + /* Ignore what the caller sent it, use the filename's */ + ExtensionString = NULL; + ExtensionLength = 0; + break; + } + } + } + } + + /* Check if we got a path */ + if (PathString->Length) + { + /* Start parsing the path name, looking for path separators */ + End = &PathString->Buffer[PathString->Length / sizeof(WCHAR)]; + p = End; + while ((p > PathString->Buffer) && (*--p == L';')) + { + /* This is the size of the path -- handle a trailing slash */ + PathSize = End - p - 1; + if ((PathSize) && !(IS_PATH_SEPARATOR(*(End - 1)))) PathSize++; + + /* Check if we found a bigger path than before */ + if (PathSize > MaxPathSize) MaxPathSize = PathSize; + + /* Keep going with the path after this path separator */ + End = p; + } + + /* This is the trailing path, run the same code as above */ + PathSize = End - p; + if ((PathSize) && !(IS_PATH_SEPARATOR(*(End - 1)))) PathSize++; + if (PathSize > MaxPathSize) MaxPathSize = PathSize; + + /* Finally, convert the largest path size into WCHAR */ + MaxPathSize *= sizeof(WCHAR); + } + + /* Use the extension, the file name, and the largest path as the size */ + WorstCaseLength = ExtensionLength + + FileNameString->Length + + MaxPathSize + + sizeof(UNICODE_NULL); + if (WorstCaseLength > UNICODE_STRING_MAX_BYTES) + { + /* It has to fit in a registry string, if not, fail here */ + DbgPrint("%s returning STATUS_NAME_TOO_LONG because the computed " + "worst case file name length is %Iu bytes\n", + __FUNCTION__, + WorstCaseLength); + Status = STATUS_NAME_TOO_LONG; + goto Quickie; + } + + /* Scan the path now, to see if we can find the file */ + p = PathString->Buffer; + End = &p[PathString->Length / sizeof(WCHAR)]; + while (p < End) + { + /* Find out where this path ends */ + for (SegmentEnd = p; + ((SegmentEnd != End) && (*SegmentEnd != L';')); + SegmentEnd++); + + /* Compute the size of this path */ + ByteCount = SegmentSize = (SegmentEnd - p) * sizeof(WCHAR); + + /* Handle trailing slash if there isn't one */ + if ((SegmentSize) && !(IS_PATH_SEPARATOR(*(SegmentEnd - 1)))) + { + /* Add space for one */ + SegmentSize += sizeof(OBJ_NAME_PATH_SEPARATOR); + } + + /* Now check if our initial static buffer is too small */ + if (StaticCandidateString.MaximumLength < + (SegmentSize + ExtensionLength + FileNameString->Length)) + { + /* At this point we should've been using our static buffer */ + ASSERT(StaticCandidateString.Buffer == StaticCandidateBuffer); + if (StaticCandidateString.Buffer != StaticCandidateBuffer) + { + /* Something is really messed up if this was the dynamic string */ + DbgPrint("%s: internal error #1; " + "CandidateString.Buffer = %p; " + "StaticCandidateBuffer = %p\n", + __FUNCTION__, + StaticCandidateString.Buffer, + StaticCandidateBuffer); + Status = STATUS_INTERNAL_ERROR; + goto Quickie; + } + + /* We checked before that the maximum possible size shoudl fit! */ + ASSERT((SegmentSize + FileNameString->Length + ExtensionLength) < + UNICODE_STRING_MAX_BYTES); + if ((SegmentSize + ExtensionLength + FileNameString->Length) > + (UNICODE_STRING_MAX_BYTES - sizeof(WCHAR))) + { + /* For some reason it's not fitting anymore. Something messed up */ + DbgPrint("%s: internal error #2; SegmentSize = %u, " + "FileName->Length = %u, DefaultExtensionLength = %u\n", + __FUNCTION__, + SegmentSize, + FileNameString->Length, + ExtensionLength); + Status = STATUS_INTERNAL_ERROR; + goto Quickie; + } + + /* Now allocate the dynamic string */ + StaticCandidateString.MaximumLength = FileNameString->Length + + WorstCaseLength; + StaticCandidateString.Buffer = RtlpAllocateStringMemory(WorstCaseLength, + TAG_USTR); + if (!StaticCandidateString.Buffer) + { + /* Out of memory, fail */ + DbgPrint("%s: Unable to allocate %u byte buffer for path candidate\n", + __FUNCTION__, + StaticCandidateString.MaximumLength); + Status = STATUS_NO_MEMORY; + goto Quickie; + } + } + + /* Copy the path in the string */ + RtlCopyMemory(StaticCandidateString.Buffer, p, ByteCount); + + /* Get to the end of the string, and add the trailing slash if missing */ + CandidateEnd = &StaticCandidateString.Buffer[ByteCount / sizeof(WCHAR)]; + if ((SegmentSize) && (SegmentSize != ByteCount)) + { + *CandidateEnd++ = OBJ_NAME_PATH_SEPARATOR; + } + + /* Copy the filename now */ + RtlCopyMemory(CandidateEnd, + FileNameString->Buffer, + FileNameString->Length); + CandidateEnd += (FileNameString->Length / sizeof(WCHAR)); + + /* Check if there was an extension */ + if (ExtensionString) + { + /* Copy the extension too */ + RtlCopyMemory(CandidateEnd, + ExtensionString->Buffer, + ExtensionString->Length); + CandidateEnd += (ExtensionString->Length / sizeof(WCHAR)); + } + + /* We are done, terminate it */ + *CandidateEnd = UNICODE_NULL; + + /* Now set the final length of the string so it becomes valid */ + StaticCandidateString.Length = (CandidateEnd - + StaticCandidateString.Buffer) * + sizeof(WCHAR); + + /* Check if this file exists */ + DPRINT("BUFFER: %S\n", StaticCandidateString.Buffer); + if (RtlDoesFileExists_UEx(StaticCandidateString.Buffer, FALSE)) + { + /* Awesome, it does, now get the full path */ + Status = RtlGetFullPathName_UstrEx(&StaticCandidateString, + CallerBuffer, + DynamicString, + (PUNICODE_STRING*)FullNameOut, + FilePartSize, + NULL, + &PathType, + LengthNeeded); + if (!(NT_SUCCESS(Status)) && + ((Status != STATUS_NO_SUCH_FILE) && + (Status != STATUS_BUFFER_TOO_SMALL))) + { + DbgPrint("%s: Failing because we thought we found %wZ on " + "the search path, but RtlGetfullPathNameUStrEx() " + "returned %08lx\n", + __FUNCTION__, + Status); + } + DPRINT("STatus: %lx BUFFER: %S\n", Status, CallerBuffer->Buffer); + goto Quickie; + } + else + { + /* Otherwise, move to the next path */ + if (SegmentEnd != End) + { + /* Handle the case of the path separator trailing */ + p = SegmentEnd + 1; + } + else + { + p = SegmentEnd; + } + } + } + + /* Loop finished and we didn't break out -- fail */ + Status = STATUS_NO_SUCH_FILE; + } + else + { + /* We have a full path, so check if it does exist */ + DPRINT("%wZ\n", FileNameString); + if (!RtlDoesFileExists_UstrEx(FileNameString, TRUE)) + { + /* It doesn't exist, did we have an extension? */ + if (!(ExtensionString) || !(ExtensionString->Length)) + { + /* No extension, so just fail */ + Status = STATUS_NO_SUCH_FILE; + goto Quickie; + } + + /* There was an extension, check if the filename already had one */ + if (!(Flags & 4) && (FileNameString->Length)) + { + /* Parse the filename */ + p = FileNameString->Buffer; + End = &p[FileNameString->Length / sizeof(WCHAR)]; + while (End > p) + { + /* If there's a path separator, there's no extension */ + if (IS_PATH_SEPARATOR(*--End)) break; + + /* Othwerwise, did we find an extension dot? */ + if (*End == L'.') + { + /* File already had an extension, so fail */ + Status = STATUS_NO_SUCH_FILE; + goto Quickie; + } + } + } + + /* So there is an extension, we'll try again by adding it */ + NamePlusExtLength = FileNameString->Length + + ExtensionString->Length + + sizeof(UNICODE_NULL); + if (NamePlusExtLength > UNICODE_STRING_MAX_BYTES) + { + /* It won't fit in any kind of valid string, so fail */ + DbgPrint("%s: Failing because filename plus extension (%Iu bytes) is too big\n", + __FUNCTION__, + NamePlusExtLength); + Status = STATUS_NAME_TOO_LONG; + goto Quickie; + } + + /* Fill it fit in our temporary string? */ + if (NamePlusExtLength > StaticCandidateString.MaximumLength) + { + /* It won't fit anymore, allocate a dynamic string for it */ + StaticCandidateString.MaximumLength = NamePlusExtLength; + StaticCandidateString.Buffer = RtlpAllocateStringMemory(NamePlusExtLength, + TAG_USTR); + if (!StaticCandidateString.Buffer) + { + /* Ran out of memory, so fail */ + DbgPrint("%s: Failing because allocating the dynamic filename buffer failed\n", + __FUNCTION__); + Status = STATUS_NO_MEMORY; + goto Quickie; + } + } + + /* Copy the filename */ + RtlCopyMemory(StaticCandidateString.Buffer, + FileNameString->Buffer, + FileNameString->Length); + + /* Copy the extension */ + RtlCopyMemory(&StaticCandidateString.Buffer[FileNameString->Length / sizeof(WCHAR)], + ExtensionString->Buffer, + ExtensionString->Length); + + /* Now NULL-terminate */ + StaticCandidateString.Buffer[StaticCandidateString.Length / sizeof(WCHAR)] = UNICODE_NULL; + + /* Finalize the length of the string to make it valid */ + StaticCandidateString.Length = FileNameString->Length + ExtensionString->Length; + DPRINT("SB: %wZ\n", &StaticCandidateString); + + /* And check if this file now exists */ + if (!RtlDoesFileExists_UstrEx(&StaticCandidateString, TRUE)) + { + /* Still no joy, fail out */ + Status = STATUS_NO_SUCH_FILE; + goto Quickie; + } + + /* File was found, get the final full path */ + Status = RtlGetFullPathName_UstrEx(&StaticCandidateString, + CallerBuffer, + DynamicString, + (PUNICODE_STRING*)FullNameOut, + FilePartSize, + NULL, + &PathType, + LengthNeeded); + if (!(NT_SUCCESS(Status)) && (Status != STATUS_NO_SUCH_FILE)) + { + DbgPrint("%s: Failing on "%wZ" because RtlGetfullPathNameUStrEx() " + "failed with status %08lx\n", + __FUNCTION__, + &StaticCandidateString, + Status); + } + DPRINT("STatus: %lx BUFFER: %S\n", Status, CallerBuffer->Buffer); + } + else + { + /* File was found on the first try, get the final full path */ + Status = RtlGetFullPathName_UstrEx(FileNameString, + CallerBuffer, + DynamicString, + (PUNICODE_STRING*)FullNameOut, + FilePartSize, + NULL, + &PathType, + LengthNeeded); + if (!(NT_SUCCESS(Status)) && + ((Status != STATUS_NO_SUCH_FILE) && + (Status != STATUS_BUFFER_TOO_SMALL))) + { + DbgPrint("%s: Failing because RtlGetfullPathNameUStrEx() on %wZ " + "failed with status %08lx\n", + __FUNCTION__, + FileNameString, + Status); + } + DPRINT("STatus: %lx BUFFER: %S\n", Status, CallerBuffer->Buffer); + } + } + +Quickie: + /* Anything that was not an error, turn into STATUS_SUCCESS */ + if (NT_SUCCESS(Status)) Status = STATUS_SUCCESS; + + /* Check if we had a dynamic string */ + if ((StaticCandidateString.Buffer) && + (StaticCandidateString.Buffer != StaticCandidateBuffer)) + { + /* Free it */ + RtlFreeUnicodeString(&StaticCandidateString); + } + + /* Return the status */ + return Status; +} + +/* + * @implemented + */ BOOLEAN NTAPI RtlDoesFileExists_U(IN PCWSTR FileName)
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