/*
* IsoLookupFile()
* This function searches the file system for the
* specified filename and fills in an ISO_FILE_INFO structure
* with info describing the file, etc. returns ARC error code
*/
static LONG IsoLookupFile(PCSTR FileName, ULONG DeviceId, PISO_FILE_INFO IsoFileInfoPointer)
{
UCHAR Buffer[SECTORSIZE];
PPVD Pvd = (PPVD)Buffer;
UINT32 i;
ULONG NumberOfPathParts;
CHAR PathPart[261];
PVOID DirectoryBuffer;
ULONG DirectorySector;
ULONG DirectoryLength;
ISO_FILE_INFO IsoFileInfo;
LARGE_INTEGER Position;
ULONG Count;
LONG ret;
TRACE("IsoLookupFile() FileName = %s\n", FileName);
RtlZeroMemory(IsoFileInfoPointer, sizeof(ISO_FILE_INFO));
RtlZeroMemory(&IsoFileInfo, sizeof(ISO_FILE_INFO));
//
// Read The Primary Volume Descriptor
//
Position.HighPart = 0;
Position.LowPart = 16 * SECTORSIZE;
ret = ArcSeek(DeviceId, &Position, SeekAbsolute);
if (ret != ESUCCESS)
return ret;
ret = ArcRead(DeviceId, Pvd, SECTORSIZE, &Count);
if (ret != ESUCCESS || Count < sizeof(PVD))
return EIO;
DirectorySector = Pvd->RootDirRecord.ExtentLocationL;
DirectoryLength = Pvd->RootDirRecord.DataLengthL;
//
// Figure out how many sub-directories we are nested in
//
NumberOfPathParts = FsGetNumPathParts(FileName);
//
// Loop once for each part
//
for (i=0; i<NumberOfPathParts; i++)
{
//
// Get first path part
//
FsGetFirstNameFromPath(PathPart, FileName);
//
// Advance to the next part of the path
//
for (; (*FileName != '\\') && (*FileName != '/') && (*FileName != '\0'); FileName++)
{
}
FileName++;
//
// Buffer the directory contents
//
ret = IsoBufferDirectory(DeviceId, DirectorySector, DirectoryLength, &DirectoryBuffer);
if (ret != ESUCCESS)
return ret;
//
// Search for file name in directory
//
if (!IsoSearchDirectoryBufferForFile(DirectoryBuffer, DirectoryLength, PathPart, &IsoFileInfo))
{
MmHeapFree(DirectoryBuffer);
return ENOENT;
}
MmHeapFree(DirectoryBuffer);
//
// If we have another sub-directory to go then
// grab the start sector and file size
//
if ((i+1) < NumberOfPathParts)
{
DirectorySector = IsoFileInfo.FileStart;
DirectoryLength = IsoFileInfo.FileSize;
}
}
RtlCopyMemory(IsoFileInfoPointer, &IsoFileInfo, sizeof(ISO_FILE_INFO));
return ESUCCESS;
}
/*
* FatLookupFile()
* This function searches the file system for the
* specified filename and fills in an FAT_FILE_INFO structure
* with info describing the file, etc. returns ARC error code
*/
LONG FatLookupFile(PFAT_VOLUME_INFO Volume, PCSTR FileName, ULONG DeviceId, PFAT_FILE_INFO FatFileInfoPointer)
{
UINT32 i;
ULONG NumberOfPathParts;
CHAR PathPart[261];
PVOID DirectoryBuffer;
ULONG DirectoryStartCluster = 0;
ULONG DirectorySize;
FAT_FILE_INFO FatFileInfo;
TRACE("FatLookupFile() FileName = %s\n", FileName);
memset(FatFileInfoPointer, 0, sizeof(FAT_FILE_INFO));
//
// Figure out how many sub-directories we are nested in
//
NumberOfPathParts = FsGetNumPathParts(FileName);
//
// Loop once for each part
//
for (i=0; i<NumberOfPathParts; i++)
{
//
// Get first path part
//
FsGetFirstNameFromPath(PathPart, FileName);
//
// Advance to the next part of the path
//
for (; (*FileName != '\\') && (*FileName != '/') && (*FileName != '\0'); FileName++)
{
}
FileName++;
//
// Buffer the directory contents
//
DirectoryBuffer = FatBufferDirectory(Volume, DirectoryStartCluster, &DirectorySize, (i == 0) );
if (DirectoryBuffer == NULL)
{
return ENOMEM;
}
//
// Search for file name in directory
//
if (ISFATX(Volume->FatType))
{
if (!FatXSearchDirectoryBufferForFile(Volume, DirectoryBuffer, DirectorySize, PathPart, &FatFileInfo))
{
MmFreeMemory(DirectoryBuffer);
return ENOENT;
}
}
else
{
if (!FatSearchDirectoryBufferForFile(Volume, DirectoryBuffer, DirectorySize, PathPart, &FatFileInfo))
{
MmFreeMemory(DirectoryBuffer);
return ENOENT;
}
}
MmFreeMemory(DirectoryBuffer);
//
// If we have another sub-directory to go then
// grab the start cluster and free the fat chain array
//
if ((i+1) < NumberOfPathParts)
{
//
// Check if current entry is a directory
//
if (!(FatFileInfo.Attributes & ATTR_DIRECTORY))
{
MmFreeMemory(FatFileInfo.FileFatChain);
return ENOTDIR;
}
DirectoryStartCluster = FatFileInfo.FileFatChain[0];
}
MmFreeMemory(FatFileInfo.FileFatChain);
}
memcpy(FatFileInfoPointer, &FatFileInfo, sizeof(FAT_FILE_INFO));
return ESUCCESS;
}
