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moby--moby/reflink_copy_darwin.go

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package docker
import (
"io"
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"os"
)
func CopyFile(dstFile, srcFile *os.File) error {
// No BTRFS reflink suppport, Fall back to normal copy
// FIXME: Check the return of Copy and compare with dstFile.Stat().Size
_, err := io.Copy(dstFile, srcFile)
return err
}