66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
#include <windows.h>
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#include <winioctl.h>
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#include <stdio.h>
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#include <ftapi.h>
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void __cdecl
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main(
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int argc,
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char** argv
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)
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{
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TCHAR dosDriveName[10];
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HANDLE h;
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BOOL b;
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PARTITION_INFORMATION partInfo;
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DWORD bytes;
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DISK_GEOMETRY geometry;
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LONGLONG newSectors;
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if (argc != 2) {
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printf("usage: %s drive:\n", argv[0]);
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return;
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}
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if (argv[1][1] != ':' || argv[1][2] != 0) {
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printf("usage: %s drive:\n", argv[0]);
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return;
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}
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wsprintf(dosDriveName, TEXT("\\\\.\\%c:"), argv[1][0]);
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h = CreateFile(dosDriveName, GENERIC_READ,
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FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL, INVALID_HANDLE_VALUE);
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if (h == INVALID_HANDLE_VALUE) {
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printf("Can't open, failed with %d\n", GetLastError());
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return;
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}
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b = DeviceIoControl(h, IOCTL_DISK_GET_PARTITION_INFO, NULL, 0,
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&partInfo, sizeof(partInfo), &bytes, NULL);
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if (!b) {
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printf("Can't read partition info, failed with %d\n", GetLastError());
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return;
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}
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b = DeviceIoControl(h, IOCTL_DISK_GET_DRIVE_GEOMETRY, NULL, 0,
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&geometry, sizeof(geometry), &bytes, NULL);
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if (!b) {
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printf("Can't read geometry info, failed with %d\n", GetLastError());
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return;
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}
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newSectors = partInfo.PartitionLength.QuadPart/geometry.BytesPerSector;
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b = DeviceIoControl(h, FSCTL_EXTEND_VOLUME, &newSectors, sizeof(newSectors),
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NULL, 0, &bytes, NULL);
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if (b) {
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printf("File system extended successfully.\n");
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} else {
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printf("File system extension failed.\n");
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}
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}
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