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querydosdevice question

querydosdevice question

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tootypegs	5 Aug, 2008 - 09:42 AM Post #1
D.I.C Head Joined: 9 Oct, 2007 Posts: 177 My Contributions	hi, could anyone help me out im having major problems trying to use the querydosdevice() function. I am trying to use this function to help me match each drive letter to its physical device number but so far Im just not having any look using it. Ive looked at msdn and even from its examples and docuemtnation i can get anything basic to compile that just prints the data out in a command line app. I would really appreciate some advice thank you
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NickDMax

RE: Querydosdevice Question
5 Aug, 2008 - 01:34 PM

Post #2

2B||!2B

Joined: 18 Feb, 2007
Posts: 2,858

Windows

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I have not done any debugging really but it seems to work for me (Dev-C++ 4.9.9.something).

cpp

#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <stdio.h>

int main() {
	char DeviceName[256]="";
	char VolumeName[256]="";
	char FileSystemName[256]="";
	HANDLE handle;
	BOOL flag = TRUE;
	BOOL gotInfo = FALSE;
	long SerialNumber;
	
	handle = FindFirstVolumeA((LPCSTR)DeviceName, 256);
	if (handle != INVALID_HANDLE_VALUE) {
        flag = TRUE;
		do {
		   	gotInfo = GetVolumeInformationA((LPCSTR)DeviceName, VolumeName, 256, &SerialNumber, NULL, NULL, FileSystemName, 256 );
		   	printf("DeviceName: %s\n", DeviceName);
		   	if (gotInfo) {
  			    printf("    VolumeName: %s\t SerialNumber: %X\n", VolumeName, SerialNumber);
		    } else {
  	            puts("    No Info Returned...\n");
			}
		   	flag = FindNextVolumeA(handle, (LPCSTR)DeviceName, 256);
 	    } while (flag == TRUE);
 	    FindVolumeClose(handle);
    }
    system("pause");
    return 0;
}

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tootypegs	RE: Querydosdevice Question 5 Aug, 2008 - 02:26 PM Post #3
D.I.C Head Joined: 9 Oct, 2007 Posts: 177 My Contributions	hi there, thank you for you reply I appreciate it and il try it straight away. ive had a go with something similar that i found on msdn which i think may be what im looking for aswell but im having a problem declaring the DISK_GEOMETRY variable as i seem to be getting errors regarding this variable. CODE #include <windows.h> #include <winioctl.h> #include <stdio.h> int main() { HANDLE hDevice; // handle to the drive to be examined BOOL bResult; // results flag DWORD junk; // discard results hDevice = CreateFile(TEXT("\\\\.\\PhysicalDrive0"), // drive 0, // no access to the drive FILE_SHARE_READ \| // share mode FILE_SHARE_WRITE, NULL, // default security attributes OPEN_EXISTING, // disposition 0, // file attributes NULL); // do not copy file attributes if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive { return (FALSE); } DISK_GEOMETRY pdg; ULONGLONG DiskSize; bResult = DeviceIoControl(hDevice, // device to be queried IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform NULL, 0, // no input buffer pdg, sizeof(pdg), // output buffer &junk, // # bytes returned (LPOVERLAPPED) NULL); // synchronous I/O printf("Cylinders = %I64d\n", pdg.Cylinders); printf("Tracks/cylinder = %ld\n", (ULONG) pdg.TracksPerCylinder); printf("Sectors/track = %ld\n", (ULONG) pdg.SectorsPerTrack); printf("Bytes/sector = %ld\n", (ULONG) pdg.BytesPerSector); DiskSize = pdg.Cylinders.QuadPart (ULONG)pdg.TracksPerCylinder * (ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector; printf("Disk size = %I64d (Bytes) = %I64d (Gb)\n", DiskSize, DiskSize / (1024 * 1024 * 1024)); }
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perfectly.insane	RE: Querydosdevice Question 5 Aug, 2008 - 04:35 PM Post #4
D.I.C Addict Joined: 22 Mar, 2008 Posts: 558 Thanked: 46 times Dream Kudos: 25 Expert In: C/C++ My Contributions	There aren't any special ifdefs that I can see in winioctl.h (which is where DISK_GEOMETRY is defined). So that might indicate one of the following: 1.) Your winioctl.h isn't complete (depending on what headers you're using, especially with Cygwin). 2.) Your winioctl.h does have special ifdefs that aren't present in MinGWs or the copy of the Windows 2003 Platform SDK that I have. 3.) There is a problem up farther in the line that is causing the error that you're seeing.
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tootypegs	RE: Querydosdevice Question 6 Aug, 2008 - 03:43 AM Post #5
D.I.C Head Joined: 9 Oct, 2007 Posts: 177 My Contributions	Thanks for the input, i have a feeling my problem is the last of the options and its deeper in my code. ive been tinkering a bit more and it seems now that the error lies with the line CODE pdg, sizeof(*pdg) errors: Not allowed type in function main? Operator not implimented in type _DISK_GEOMETrY for arguments of the same type in main I think solving this could solve my problem
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perfectly.insane	RE: Querydosdevice Question 6 Aug, 2008 - 02:25 PM Post #6
D.I.C Addict Joined: 22 Mar, 2008 Posts: 558 Thanked: 46 times Dream Kudos: 25 Expert In: C/C++ My Contributions	I'm guessing that you meant to use: &pdg, sizeof(pdg) as opposed to pdg, sizeof(*pdg). DISK_GEOMETRY is not a pointer type. ( This probably won't help the type definition problem, as the type definition is above the erroneous code, not below it. Plus, it's not a syntax error that affects the structure of the program. )
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