windows-nt/Source/XPSP1/NT/sdktools/compdir/link.c

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2020-09-26 03:20:57 -05:00
#define UNICODE
#define _UNICODE
#include <nt.h>
#include <ntrtl.h>
#include <nturtl.h>
#include <tchar.h>
#include "compdir.h"
#define SHARE_ALL (FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE)
#define lstrchr wcschr
typedef VOID (*RtlFreeUnicodeStringFunction)();
typedef ULONG (*RtlNtStatusToDosErrorFunction)();
typedef NTSTATUS (*NtCloseFunction)();
typedef NTSTATUS (*NtSetInformationFileFunction)();
typedef VOID (*RtlInitUnicodeStringFunction)();
typedef NTSTATUS (*NtOpenFileFunction)();
typedef BOOLEAN (*RtlCreateUnicodeStringFromAsciizFunction)();
typedef NTSTATUS (*NtQueryInformationFileFunction)();
typedef NTSTATUS (*NtFsControlFileFunction)();
typedef NTSTATUS (*RtlDosPathNameToNtPathName_UFunction)();
RtlFreeUnicodeStringFunction CDRtlFreeUnicodeString;
RtlNtStatusToDosErrorFunction CDRtlNtStatusToDosError;
NtCloseFunction CDNtClose;
NtSetInformationFileFunction CDNtSetInformationFile;
RtlInitUnicodeStringFunction CDRtlInitUnicodeString;
NtOpenFileFunction CDNtOpenFile;
RtlCreateUnicodeStringFromAsciizFunction CDRtlCreateUnicodeStringFromAsciiz;
NtQueryInformationFileFunction CDNtQueryInformationFile;
NtFsControlFileFunction CDNtFsControlFile;
RtlDosPathNameToNtPathName_UFunction CDRtlDosPathNameToNtPathName_U;
BOOL InitializeNtDllFunctions()
{
CDRtlFreeUnicodeString = (RtlFreeUnicodeStringFunction) GetProcAddress( NtDll, "RtlFreeUnicodeString");
if (CDRtlFreeUnicodeString == NULL) return FALSE;
CDRtlNtStatusToDosError = (RtlNtStatusToDosErrorFunction) GetProcAddress( NtDll, "RtlNtStatusToDosError");
if (CDRtlNtStatusToDosError == NULL) return FALSE;
CDNtClose = (NtCloseFunction) GetProcAddress( NtDll, "NtClose");
if (CDNtClose == NULL) return FALSE;
CDNtSetInformationFile = (NtSetInformationFileFunction) GetProcAddress( NtDll, "NtSetInformationFile");
if (CDNtSetInformationFile == NULL) return FALSE;
CDRtlInitUnicodeString = (RtlInitUnicodeStringFunction) GetProcAddress( NtDll, "RtlInitUnicodeString");
if (CDRtlInitUnicodeString == NULL) return FALSE;
CDNtOpenFile = (NtOpenFileFunction) GetProcAddress( NtDll, "NtOpenFile");
if (CDNtOpenFile == NULL) return FALSE;
CDRtlCreateUnicodeStringFromAsciiz = (RtlCreateUnicodeStringFromAsciizFunction) GetProcAddress( NtDll, "RtlCreateUnicodeStringFromAsciiz");
if (CDRtlCreateUnicodeStringFromAsciiz == NULL) return FALSE;
CDNtQueryInformationFile = (NtQueryInformationFileFunction) GetProcAddress( NtDll, "NtQueryInformationFile");
if (CDNtQueryInformationFile == NULL) return FALSE;
CDNtFsControlFile = (NtFsControlFileFunction)GetProcAddress( NtDll, "NtFsControlFile");
if (CDNtFsControlFile == NULL) return FALSE;
CDRtlDosPathNameToNtPathName_U = (RtlDosPathNameToNtPathName_UFunction)GetProcAddress( NtDll, "RtlDosPathNameToNtPathName_U");
if (CDRtlDosPathNameToNtPathName_U == NULL) return FALSE;
return TRUE;
}
BOOL MakeLink( char *src, char *dst, BOOL Output)
{
WCHAR OldNameBuf[MAX_PATH + 50];
WCHAR NewNameBuf[MAX_PATH + 50];
HANDLE FileHandle,
NewFileHandle,
RootDirHandle;
NTSTATUS Status;
IO_STATUS_BLOCK Iosb;
OBJECT_ATTRIBUTES Obj;
PFILE_LINK_INFORMATION pLinkInfo;
UNICODE_STRING u,
uRel;
WCHAR *pch, ch;
UNICODE_STRING uOldName;
UNICODE_STRING uNewName;
UNICODE_STRING uSrc, uDst;
(CDRtlCreateUnicodeStringFromAsciiz)( &uSrc, src);
(CDRtlCreateUnicodeStringFromAsciiz)( &uDst, dst);
lstrcpy( OldNameBuf, L"\\??\\");
lstrcat( OldNameBuf, uSrc.Buffer);
(CDRtlInitUnicodeString)( &uOldName, OldNameBuf);
lstrcpy( NewNameBuf, L"\\??\\");
lstrcat( NewNameBuf, uDst.Buffer);
(CDRtlInitUnicodeString)( &uNewName, NewNameBuf);
//
// Open the existing pathname.
//
InitializeObjectAttributes( &Obj, &uOldName, OBJ_CASE_INSENSITIVE, NULL, NULL);
Status = (CDNtOpenFile)( &FileHandle, SYNCHRONIZE, &Obj, &Iosb,
SHARE_ALL, FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT);
if ( !NT_SUCCESS( Status))
{
SetLastError( ( CDRtlNtStatusToDosError)( Status));
if ( Output)
{
fprintf( stderr, "Could not open %s", src);
}
return FALSE;
}
//
// Now we need to get a handle on the root directory of the 'new'
// pathname; we'll pass that in the link information, and the
// rest of the path will be given relative to the root. We
// depend on paths looking like "\DosDevices\X:\path".
//
pch = lstrchr( uNewName.Buffer + 1, '\\');
ASSERT( NULL != pch);
pch = lstrchr( pch + 1, '\\');
if (!pch) {
SetLastError(ERROR_INVALID_PARAMETER);
if ( Output)
{
fprintf( stderr, "Invalid path %S", uNewName.Buffer);
}
return FALSE;
}
ch = pch[1];
pch[1] = '\0';
uNewName.Length = (USHORT)(lstrlen( uNewName.Buffer) * sizeof( WCHAR));
InitializeObjectAttributes( &Obj, &uNewName, OBJ_CASE_INSENSITIVE, NULL, NULL);
Status = (CDNtOpenFile)( &RootDirHandle, SYNCHRONIZE, &Obj, &Iosb,
SHARE_ALL, FILE_SYNCHRONOUS_IO_NONALERT | FILE_DIRECTORY_FILE);
pch[1] = ch;
if ( !NT_SUCCESS( Status))
{
SetLastError( (CDRtlNtStatusToDosError)( Status));
if ( Output)
{
fprintf( stderr, "Could not get directory handle for %s", dst);
}
return FALSE;
}
//
// Now get the path relative to the root.
//
(CDRtlInitUnicodeString)( &uRel, &pch[1]);
pLinkInfo = _alloca( sizeof( *pLinkInfo) + uRel.Length);
if ( NULL == pLinkInfo)
{
(CDNtClose)( RootDirHandle);
(CDNtClose)( FileHandle);
SetLastError( ERROR_NOT_ENOUGH_MEMORY);
return FALSE;
}
RtlMoveMemory( pLinkInfo->FileName, uRel.Buffer, uRel.Length);
pLinkInfo->FileNameLength = uRel.Length;
pLinkInfo->ReplaceIfExists = TRUE;
pLinkInfo->RootDirectory = RootDirHandle;
Status = (CDNtSetInformationFile)( FileHandle, &Iosb, pLinkInfo,
sizeof( *pLinkInfo) + uRel.Length, FileLinkInformation);
// If file is already linked to an open file try to delete it
if ( Status == STATUS_ACCESS_DENIED)
{
_unlink( dst);
Status = (CDNtSetInformationFile)( FileHandle, &Iosb, pLinkInfo,
sizeof( *pLinkInfo) + uRel.Length, FileLinkInformation);
}
(CDNtClose)( RootDirHandle);
(CDNtClose)( FileHandle);
if ( !NT_SUCCESS( Status))
{
SetLastError( (CDRtlNtStatusToDosError)( Status));
if ( Output)
{
fprintf( stderr, "Could not create link for %s", dst);
}
return FALSE;
}
(CDRtlFreeUnicodeString)( &uSrc);
(CDRtlFreeUnicodeString)( &uDst);
return TRUE;
}
int NumberOfLinks( char *FileName)
{
FILE_STANDARD_INFORMATION FileInfo;
WCHAR FileNameBuf[MAX_PATH + 50];
HANDLE FileHandle;
NTSTATUS Status;
IO_STATUS_BLOCK Iosb;
OBJECT_ATTRIBUTES Obj;
UNICODE_STRING uPrelimFileName,
uFileName;
(CDRtlCreateUnicodeStringFromAsciiz)( &uPrelimFileName, FileName);
lstrcpy( FileNameBuf, L"\\??\\");
lstrcat( FileNameBuf, uPrelimFileName.Buffer);
(CDRtlInitUnicodeString)( &uFileName, FileNameBuf);
InitializeObjectAttributes( &Obj, &uFileName, OBJ_CASE_INSENSITIVE, NULL, NULL);
Status = (CDNtOpenFile)( &FileHandle, SYNCHRONIZE, &Obj, &Iosb,
SHARE_ALL, FILE_NON_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT);
if ( !NT_SUCCESS( Status))
{
SetLastError( (CDRtlNtStatusToDosError)( Status));
return 0;
}
Status = (CDNtQueryInformationFile)( FileHandle, &Iosb, &FileInfo,
sizeof( FileInfo), FileStandardInformation);
(CDNtClose)( FileHandle);
if ( !NT_SUCCESS( Status))
{
SetLastError( (CDRtlNtStatusToDosError)( Status));
return 0;
}
return FileInfo.NumberOfLinks;
}
BOOL
SisCopyFile(
LPCSTR lpExistingFileName,
LPCSTR lpNewFileName,
BOOL bFailIfExists,
LPBOOL fTrySis
)
{
BOOL ok;
DWORD err;
NTSTATUS Status;
HANDLE volHandle;
UNICODE_STRING srcFileName, dstFileName;
UNICODE_STRING srcDosFileName, dstDosFileName;
PSI_COPYFILE copyFile;
UCHAR Buffer[(sizeof(SI_COPYFILE) + MAX_PATH * 2) * sizeof(WCHAR)];
OBJECT_ATTRIBUTES objectAttributes;
IO_STATUS_BLOCK ioStatusBlock;
int i;
copyFile = (PSI_COPYFILE)Buffer;
srcFileName.Buffer = NULL;
dstFileName.Buffer = NULL;
srcDosFileName.Buffer = NULL;
srcDosFileName.Buffer = NULL;
//
// Convert the ansii names to unicode and place in the copyFile buffer.
//
ok = CDRtlCreateUnicodeStringFromAsciiz( &srcDosFileName, lpExistingFileName );
if (!ok) {
return FALSE;
}
ok = CDRtlDosPathNameToNtPathName_U( srcDosFileName.Buffer, &srcFileName, NULL, NULL );
if (!ok) {
goto error;
}
CDRtlFreeUnicodeString( &srcDosFileName );
ok = CDRtlCreateUnicodeStringFromAsciiz( &dstDosFileName, lpNewFileName );
if (!ok) {
goto error;
}
ok = CDRtlDosPathNameToNtPathName_U( dstDosFileName.Buffer, &dstFileName, NULL, NULL );
if (!ok) {
goto error;
}
CDRtlFreeUnicodeString( &dstDosFileName );
copyFile->SourceFileNameLength = srcFileName.Length + sizeof(WCHAR);
copyFile->DestinationFileNameLength = dstFileName.Length + sizeof(WCHAR);
copyFile->Flags = bFailIfExists ? 0 : COPYFILE_SIS_REPLACE;
RtlCopyMemory(
&copyFile->FileNameBuffer[0],
srcFileName.Buffer,
copyFile->SourceFileNameLength);
RtlCopyMemory(
&copyFile->FileNameBuffer[copyFile->SourceFileNameLength / sizeof(WCHAR)],
dstFileName.Buffer,
copyFile->DestinationFileNameLength);
CDRtlFreeUnicodeString( &dstFileName );
#define copyFileSize (FIELD_OFFSET(SI_COPYFILE, FileNameBuffer) + \
copyFile->SourceFileNameLength + \
copyFile->DestinationFileNameLength)
//
// Get a handle to the source file's containing directory to pass into
// FSCTL_SIS_COPYFILE,
//
for (i = srcFileName.Length / sizeof(WCHAR) - 1;
i >= 0 && srcFileName.Buffer[i] != '\\';
--i)
continue;
srcFileName.Length = (USHORT)(i * sizeof(WCHAR));
InitializeObjectAttributes(
&objectAttributes,
&srcFileName,
OBJ_CASE_INSENSITIVE,
NULL,
NULL);
//
// Need to use NtOpenFile because Win32 doesn't let you open a directory.
//
Status = CDNtOpenFile(
&volHandle,
GENERIC_READ | SYNCHRONIZE,
&objectAttributes,
&ioStatusBlock,
SHARE_ALL,
FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT);
CDRtlFreeUnicodeString( &srcFileName );
if (!NT_SUCCESS(Status)) {
SetLastError(CDRtlNtStatusToDosError(Status));
return FALSE;
}
//
// Invoke the SIS CopyFile FsCtrl.
//
Status = CDNtFsControlFile(
volHandle,
NULL,
NULL,
NULL,
&ioStatusBlock,
FSCTL_SIS_COPYFILE,
copyFile, // Input buffer
copyFileSize, // Input buffer length
NULL, // Output buffer
0 ); // Output buffer length
CloseHandle( volHandle );
if (NT_SUCCESS( Status )) {
return TRUE;
}
if ((Status == STATUS_INVALID_DEVICE_REQUEST) || (Status == STATUS_INVALID_PARAMETER)) {
*fTrySis = FALSE;
}
SetLastError(CDRtlNtStatusToDosError(Status));
return FALSE;
error:
err = GetLastError();
CDRtlFreeUnicodeString( &srcDosFileName );
CDRtlFreeUnicodeString( &dstDosFileName );
CDRtlFreeUnicodeString( &srcFileName );
CDRtlFreeUnicodeString( &dstDosFileName );
SetLastError(err);
return FALSE;
}