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Copy pathstat_windows.go
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94 lines (82 loc) · 3.36 KB
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// +build windows
/*
* MinIO Cloud Storage, (C) 2015 MinIO, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package disk
import (
"os"
"syscall"
"unsafe"
)
var (
kernel32 = syscall.NewLazyDLL("kernel32.dll")
// GetDiskFreeSpaceEx - https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
// Retrieves information about the amount of space that is available on a disk volume,
// which is the total amount of space, the total amount of free space, and the total
// amount of free space available to the user that is associated with the calling thread.
GetDiskFreeSpaceEx = kernel32.NewProc("GetDiskFreeSpaceExW")
// GetDiskFreeSpace - https://msdn.microsoft.com/en-us/library/windows/desktop/aa364935(v=vs.85).aspx
// Retrieves information about the specified disk, including the amount of free space on the disk.
GetDiskFreeSpace = kernel32.NewProc("GetDiskFreeSpaceW")
)
// GetInfo returns total and free bytes available in a directory, e.g. `C:\`.
// It returns free space available to the user (including quota limitations)
//
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
func GetInfo(path string) (info Info, err error) {
// Stat to know if the path exists.
if _, err = os.Stat(path); err != nil {
return Info{}, err
}
lpFreeBytesAvailable := int64(0)
lpTotalNumberOfBytes := int64(0)
lpTotalNumberOfFreeBytes := int64(0)
// Extract values safely
// BOOL WINAPI GetDiskFreeSpaceEx(
// _In_opt_ LPCTSTR lpDirectoryName,
// _Out_opt_ PULARGE_INTEGER lpFreeBytesAvailable,
// _Out_opt_ PULARGE_INTEGER lpTotalNumberOfBytes,
// _Out_opt_ PULARGE_INTEGER lpTotalNumberOfFreeBytes
// );
_, _, _ = GetDiskFreeSpaceEx.Call(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(path))),
uintptr(unsafe.Pointer(&lpFreeBytesAvailable)),
uintptr(unsafe.Pointer(&lpTotalNumberOfBytes)),
uintptr(unsafe.Pointer(&lpTotalNumberOfFreeBytes)))
info = Info{}
info.Total = uint64(lpTotalNumberOfBytes)
info.Free = uint64(lpFreeBytesAvailable)
info.FSType = getFSType(path)
// Return values of GetDiskFreeSpace()
lpSectorsPerCluster := uint32(0)
lpBytesPerSector := uint32(0)
lpNumberOfFreeClusters := uint32(0)
lpTotalNumberOfClusters := uint32(0)
// Extract values safely
// BOOL WINAPI GetDiskFreeSpace(
// _In_ LPCTSTR lpRootPathName,
// _Out_ LPDWORD lpSectorsPerCluster,
// _Out_ LPDWORD lpBytesPerSector,
// _Out_ LPDWORD lpNumberOfFreeClusters,
// _Out_ LPDWORD lpTotalNumberOfClusters
// );
_, _, _ = GetDiskFreeSpace.Call(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(path))),
uintptr(unsafe.Pointer(&lpSectorsPerCluster)),
uintptr(unsafe.Pointer(&lpBytesPerSector)),
uintptr(unsafe.Pointer(&lpNumberOfFreeClusters)),
uintptr(unsafe.Pointer(&lpTotalNumberOfClusters)))
info.Files = uint64(lpTotalNumberOfClusters)
info.Ffree = uint64(lpNumberOfFreeClusters)
return info, nil
}