rclone/backend/local/about_windows.go

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// +build windows
package local
import (
"context"
"syscall"
"unsafe"
"github.com/ncw/rclone/fs"
"github.com/pkg/errors"
)
var getFreeDiskSpace = syscall.NewLazyDLL("kernel32.dll").NewProc("GetDiskFreeSpaceExW")
// About gets quota information
func (f *Fs) About(ctx context.Context) (*fs.Usage, error) {
var available, total, free int64
_, _, e1 := getFreeDiskSpace.Call(
uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(f.root))),
uintptr(unsafe.Pointer(&available)), // lpFreeBytesAvailable - for this user
uintptr(unsafe.Pointer(&total)), // lpTotalNumberOfBytes
uintptr(unsafe.Pointer(&free)), // lpTotalNumberOfFreeBytes
)
if e1 != syscall.Errno(0) {
return nil, errors.Wrap(e1, "failed to read disk usage")
}
usage := &fs.Usage{
Total: fs.NewUsageValue(total), // quota of bytes that can be used
Used: fs.NewUsageValue(total - free), // bytes in use
Free: fs.NewUsageValue(available), // bytes which can be uploaded before reaching the quota
}
return usage, nil
}
// check interface
var _ fs.Abouter = &Fs{}