逻辑盘符问题，谢谢！

[Comeon_01]

1、我想通过读取硬盘分区表获得逻辑盘符，类如：C、D、E、F...，请问怎么获得啊？大家帮帮忙吧，谢谢了！
2、Disk32.dll和ReadDisk32是什么意思啊？通过这个文件和函数就可以成功得得到硬盘分区表吗？谢谢大家了！

[scq2099yt]

UP1楼

[marine8086]

读个盘符,犯不上读分区表吧?

DWORD GetLogicalDrives(void);
或者
DWORD GetLogicalDriveStrings(
DWORD nBufferLength,
LPTSTR lpBuffer
);

具体看MSDN

[tccqs]

up and mark,,

[Comeon_01]

PARTITION *PartitionTable;//分区表
WORD SectPerTrackTmp=0, TotHeadsTmp=0;
for(i=0;;i++)
{
if(gOSWin95)
{
if(!(DllThunk32)(i+0x80, 0, 0, 1, 1, (LPBYTE) TmpStr1, 0, FALSE))
break;
}
else
{
char TmpStr[26] = "\\\\.\\PHYSICALDRIVE0";
TmpStr[17] = i+'0';
if((hDisk[i+0x80]=CreateFile(TmpStr, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_NO_BUFFERING, NULL))==INVALID_HANDLE_VALUE)
break;
}
char TmpStr[100];
PartitionTable = (PARTITION *) (TmpStr1+0x1BE);//获取主分区表
DWORD Tmp1;
if(gOSWin95)
{
if(!(DllThunk32)(i+0x80, 0, 0, 1, 1, (LPBYTE) TmpStr1, 0, FALSE))
break;
}
else
{
ReadFile(hDisk[i+0x80], TmpStr1, 512, &Tmp1, FALSE);
}

wsprintf(TmpStr, "%lu号硬盘", i+1);
Packet->Drive = 0x80+i;
Packet->Cylinder = 0;//0柱面0磁头1扇区
Packet->Head = 0;
Packet->Sector = 1;
Packet->NumSectors=0;
for(int Tmp=0; Tmp<4; Tmp++)//4个
Packet->NumSectors += PartitionTable[Tmp].NumberSectors;
Packet->Type = PART_TABLE;
Packet->RelativeSector = 0;
Packet->NTRelativeSector = 0;
if(gOSWin95)
Packet->Flag = (DllCheckInt13Extension)(0x80+i);
else
Packet->Flag = 0;

NumHards++;

m_Drives.InsertItem(TVIF_TEXT | TVIF_PARAM |TVIF_IMAGE |TVIF_SELECTEDIMAGE, TmpStr, 1, 1, 0, 0, (LPARAM)Packet, hPhysical, TVI_LAST);
Packet++;
}
HTREEITEM hLogical = m_Drives.InsertItem("逻辑硬盘", 0, 0, TVI_ROOT, TVI_LAST);
for(int PhysHard=0; PhysHard<NumHards; PhysHard++)
{
PrevRelSector = MainPrevRelSector = 0;
if(gOSWin95)
{
if(!(DllThunk32)(DrivePacket[PhysHard].Drive, DrivePacket[PhysHard].Cylinder, DrivePacket[PhysHard].Head,
DrivePacket[PhysHard].Sector, 1, (LPBYTE)BufferDir, DrivePacket[PhysHard].NTRelativeSector, DrivePacket[PhysHard].Flag))
{
AfxMessageBox("Partition table not accessible!");
return;
}
}
else
{
__int64 Tmp64 = ((__int64) DrivePacket[PhysHard].NTRelativeSector) * 512;
long TmpVal = Tmp64 & 0xFFFFFFFF;
long TmpValHi = (Tmp64 >> 32);
SetFilePointer(hDisk[DrivePacket[PhysHard].Drive], TmpVal, &TmpValHi, FILE_BEGIN);
TmpVal = 0;
ReadFile(hDisk[DrivePacket[PhysHard].Drive], BufferDir, 512, (DWORD *) &TmpVal, NULL);
if(TmpVal != (512))
{
AfxMessageBox("Partition table not accessible!");
return;
}
}
PartitionTable = (PARTITION *) (BufferDir+0x1BE);
for(i=0; i<4; i++)
{
Packet->Cylinder = PartitionTable->Cylinder;
Packet->Drive = DrivePacket[PhysHard].Drive;
Packet->Flag = DrivePacket[PhysHard].Flag;
Packet->Head = PartitionTable->Head;
Packet->Sector = PartitionTable->Sector;
Packet->NumSectors = PartitionTable->NumberSectors;
Packet->Type = ((PartitionTable->SysInd == PART_EXTENDED) || (PartitionTable->SysInd == PART_DOSX13X)) ? EXTENDED_PART:BOOT_RECORD;
if((PartitionTable->SysInd == PART_EXTENDED) || (PartitionTable->SysInd == PART_DOSX13X))
{
MainPrevRelSector = PartitionTable->RelativeSector;
Packet->NTRelativeSector = MainPrevRelSector;
}
else
{
Packet->NTRelativeSector = MainPrevRelSector + PartitionTable->RelativeSector;
}
if(Packet->Type == EXTENDED_PART)
break;
if(PartitionTable->SysInd == 0)
break;
char TmpStr1[10];
switch(PartitionTable->SysInd)
{
case PART_DOS2_FAT:
strcpy(TmpStr1, "FAT12");
break;
case PART_DOSX13:
case PART_DOS4_FAT:
case PART_DOS3_FAT:
strcpy(TmpStr1, "FAT16");
break;
case PART_DOS32X:
case PART_DOS32:
strcpy(TmpStr1, "FAT32"); //Normal FAT32
break;
case 7:
strcpy(TmpStr1, "NTFS");
break;
default:
strcpy(TmpStr1, "Unknown");
break;
}
if((TmpStr1[0] == 'F') && gOSWin95)
{
if((DllThunk32)(Packet->Drive, Packet->Cylinder, Packet->Head,
Packet->Sector, 1, (LPBYTE)::TmpStr1, Packet->NTRelativeSector, Packet->Flag))
{
BOOT *Boot=(BOOT *)::TmpStr1;
Packet->SectorsPerTrack=Boot->SectorsPerTrack;
Packet->TotalHeads = Boot->NumHeads;
for(int k=0; k<NumHards; k++)
{
DrivePacket[k].SectorsPerTrack = Boot->SectorsPerTrack;
DrivePacket[k].TotalHeads = Boot->NumHeads;
}
}
}
wsprintf(TmpStr, "%u号硬盘1号分区(%s)", PhysHard+1, TmpStr1);
/*wsprintf(TmpStr, "%s Disk 1 on Hard Disk %u", TmpStr1, PhysHard+1);*/
m_Drives.InsertItem(TVIF_TEXT | TVIF_PARAM | TVIF_IMAGE |TVIF_SELECTEDIMAGE, TmpStr, 1, 1, 0, 0, (LPARAM)Packet, hLogical, TVI_LAST);
Packet++;
PartitionTable++;
}
if(i==4)
break;
for(int LogiHard=0; LogiHard<50; LogiHard++)
{
if(Packet->Type == EXTENDED_PART)
{
if(gOSWin95)
{
if(!(DllThunk32)(Packet->Drive, Packet->Cylinder, Packet->Head,
Packet->Sector, 1, (LPBYTE)BufferDir, Packet->NTRelativeSector, Packet->Flag))
{
AfxMessageBox("Extended partition not accessible!");
return;
}
}
else
{
__int64 Tmp64 = ((__int64) Packet->NTRelativeSector) * 512;
long TmpVal = Tmp64 & 0xFFFFFFFF;
long TmpValHi = (Tmp64 >> 32);
SetFilePointer(hDisk[Packet->Drive], TmpVal, &TmpValHi, FILE_BEGIN);
TmpVal = 0;
ReadFile(hDisk[Packet->Drive], BufferDir, 512, (DWORD *) &TmpVal, NULL);
if(TmpVal != 512)
{
AfxMessageBox("Extended partition not accessible!");
return;
}
}
PartitionTable = (PARTITION *) (BufferDir+0x1BE);
for(i=0; i<4; i++)
{
Packet->Cylinder = PartitionTable->Cylinder;
Packet->Drive = DrivePacket[PhysHard].Drive;
Packet->Flag = DrivePacket[PhysHard].Flag;
Packet->Head = PartitionTable->Head;
Packet->NumSectors = PartitionTable->NumberSectors;
Packet->Sector = PartitionTable->Sector;
Packet->RelativeSector = 0;
Packet->Type = ((PartitionTable->SysInd == PART_EXTENDED) || (PartitionTable->SysInd == PART_DOSX13X)) ? EXTENDED_PART:BOOT_RECORD;
if((PartitionTable->SysInd == PART_EXTENDED) || (PartitionTable->SysInd == PART_DOSX13X))
{
PrevRelSector = PartitionTable->RelativeSector;
Packet->NTRelativeSector = PrevRelSector + MainPrevRelSector;
}
else
{
Packet->NTRelativeSector = MainPrevRelSector + PrevRelSector + PartitionTable->RelativeSector;
}
if(Packet->Type == EXTENDED_PART)
break;
if(PartitionTable->SysInd == 0)
break;
switch(PartitionTable->SysInd)
{
case PART_DOS2_FAT:
strcpy(TmpStr1, "FAT12");
break;
case PART_DOSX13:
case PART_DOS4_FAT:
case PART_DOS3_FAT:
strcpy(TmpStr1, "FAT16");
break;
case PART_DOS32X:
case PART_DOS32:
strcpy(TmpStr1, "FAT32"); //Normal FAT32
break;
case 7:
strcpy(TmpStr1, "NTFS");
break;
default:
strcpy(TmpStr1, "Unknown");
break;
}
wsprintf(TmpStr, "%u号硬盘%u号分区(%s)", PhysHard+1, LogiHard+2, TmpStr1);
/*wsprintf(TmpStr, "%s Disk %u on Hard Disk %u", TmpStr1, LogiHard+2, PhysHard+1);*/
m_Drives.InsertItem(TVIF_TEXT | TVIF_PARAM | TVIF_IMAGE |TVIF_SELECTEDIMAGE, TmpStr, 1, 1, 0, 0, (LPARAM)Packet, hLogical, TVI_LAST);
Packet++;
PartitionTable++;
}
if(i==4)
break;
}
}
}

[Comeon_01]

我是想在这段代码里嵌入，所以才问一下的，要不然不可能知道1、2、3、4号磁盘与C、D、E、F的准确对应，谢谢大家了！

[ahuisafe]

4 对应D盘

[ahuisafe]

Shell也可以读取

[Comeon_01]

但是，分区表中只能有4个主分区啊，而扩展分区不是从5号开始的吗？不能说4对应D盘吧？谢谢了！

[cnzdgs]

系统中的盘符是可以任意指定的，你从分区表中根本无法判断出盘符是什么。
应该用DeviceIoControl，代码如下：

	PARTITION_INFORMATION informations;
	DWORD bytesReturned;
	HANDLE device = CreateFile(_T("\\\\.\\C:"), GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
	DeviceIoControl(device, IOCTL_DISK_GET_PARTITION_INFO, NULL, 0, &informations, sizeof(informations), &bytesReturned, NULL);
	CloseHandle(device);
// informations中可以得到该盘符对应的分区号、开始位置、大小等信息。