用DeviceIoControl获取系统磁盘信息

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本文介绍了一个C++程序，该程序利用Windows API函数获取物理硬盘的基本信息，包括硬盘大小、柱面数、磁盘类型等，并通过特定设备控制命令读取分区布局。

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原文地址:http://www.cppblog.com/dingding/archive/2008/09/23/62570.html

代码：
#include <iostream>
#include <windows.h>
using namespace std;

int main()
{
SECURITY_ATTRIBUTES secStru;
secStru.bInheritHandle=0;
secStru.lpSecurityDescriptor=0;
secStru.nLength=0;
HANDLE hDevice=CreateFile("\\\\.\\PhysicalDrive0",GENERIC_READ | GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,NULL);

if(hDevice==INVALID_HANDLE_VALUE)
{
return -1;
}

//DWORD outBuff[1000];
GET_LENGTH_INFORMATION infoStruct;

memset(&infoStruct,0,sizeof(infoStruct));
DWORD bytesReturned;
if(DeviceIoControl(hDevice,IOCTL_DISK_GET_LENGTH_INFO,NULL,0,&infoStruct,sizeof(infoStruct),&bytesReturned,NULL)==0)
{
  cout<<"Failed to get disk information."<<endl;
  DWORD error;
  error=GetLastError();
  HRESULT hRe=HRESULT_FROM_WIN32(error);
  char errorData[10];
  sprintf(errorData,"%x",hRe);
  cout<<"Error code:"<</*hRe*/errorData<<endl;
  CloseHandle(hDevice);
  return -1;
}

DISK_GEOMETRY_EX geoStruct;
memset(&geoStruct,0,sizeof(geoStruct));
if(DeviceIoControl(hDevice,IOCTL_DISK_GET_DRIVE_GEOMETRY_EX ,NULL,0,&geoStruct,sizeof(geoStruct),&bytesReturned,NULL)==0)
{
  cout<<"Failed to get disk information."<<endl;
  DWORD error;
  error=GetLastError();
  HRESULT hRe=HRESULT_FROM_WIN32(error);
  char errorData[10];
  sprintf(errorData,"%x",hRe);
  cout<<"Error code:"<</*hRe*/errorData<<endl;
  CloseHandle(hDevice);
  return -1;
}

cout<<"The disk's size is:"<<infoStruct.Length.QuadPart/1024/1024/1024<<" G Bytes."<<endl;
cout<<"The disk's cylinder number:"<<geoStruct.Geometry.Cylinders.QuadPart<<endl;
cout<<"The disk's media type:"<<geoStruct.Geometry.MediaType<<endl;
cout<<"Number of tracks per cylinder:"<<geoStruct.Geometry.TracksPerCylinder<<endl;
cout<<"Number of sectors per track:"<<geoStruct.Geometry.SectorsPerTrack<<endl;
cout<<"Number of bytes per sector:"<<geoStruct.Geometry.BytesPerSector<<endl;

PDISK_PARTITION_INFO partitionInfo=DiskGeometryGetPartition(&geoStruct);

DRIVE_LAYOUT_INFORMATION_EX layOutInfo[20];

memset(&layOutInfo,0,sizeof(DRIVE_LAYOUT_INFORMATION_EX)*20);

//layOutInfo.PartitionEntry=*(new PARTITION_INFORMATION_EX[10]);

if(DeviceIoControl(hDevice,IOCTL_DISK_GET_DRIVE_LAYOUT_EX,NULL,0,&layOutInfo,sizeof(DRIVE_LAYOUT_INFORMATION_EX)*20,&bytesReturned,NULL)==0)
{
  cout<<"Failed to get disk information."<<endl;
  DWORD error;
  error=GetLastError();
  HRESULT hRe=HRESULT_FROM_WIN32(error);
  char errorData[10];
  sprintf(errorData,"%x",hRe);
  cout<<"Error code:"<</*hRe*/errorData<<endl;
  CloseHandle(hDevice);
  return -1;
}

int partitionCount=layOutInfo[0].PartitionCount;
cout<<"Number of partitions:"<<layOutInfo[0].PartitionCount<<endl;
cout<<"Partitions' information:"<<endl;
for(int i=0;i<partitionCount;i++)
{
  //PDISK_PARTITION_INFO pParInfo=partitionInfo+i*sizeof(DISK_PARTITION_INFO);
  if(layOutInfo[i].PartitionEntry[0].PartitionNumber!=0)
  {
   cout<<"Partition "<<layOutInfo[i].PartitionEntry[0].PartitionNumber<<", partition size is "<<layOutInfo[i].PartitionEntry[0].PartitionLength.QuadPart/1024/1024/1024<<" G Bytes, partition style is "<<layOutInfo[i].PartitionEntry[0].PartitionStyle<<endl;
  }
}

//cout<<"The type of partition:"<<((partitionInfo.PartitionStyle==PARTITION_STYLE_MBR) ?"MBR":((partitionInfo.PartitionStyle==PARTITION_STYLE_GPT )?"GPT":((partitionInfo.PartitionStyle==PARTITION_STYLE_RAW)?"RAW":"")))<<endl;

CloseHandle(hDevice);

return 0;
}