36 lines
635 B
Go
36 lines
635 B
Go
// +build linux,cgo
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package lfs
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/*
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#include <sys/ioctl.h>
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#undef BTRFS_IOCTL_MAGIC
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#define BTRFS_IOCTL_MAGIC 0x94
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#undef BTRFS_IOC_CLONE
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#define BTRFS_IOC_CLONE _IOW (BTRFS_IOCTL_MAGIC, 9, int)
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*/
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import "C"
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import (
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"os"
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"io"
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"syscall"
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)
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const (
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BtrfsIocClone = C.BTRFS_IOC_CLONE
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)
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func CloneFile(writer io.Writer, reader io.Reader) (bool, error) {
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fdst, fdstFound := writer.(*os.File)
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fsrc, fsrcFound := reader.(*os.File)
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if fdstFound && fsrcFound {
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if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fdst.Fd(), BtrfsIocClone, fsrc.Fd()); err != 0 {
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return false, err
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}
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return true, nil
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}
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return false, nil
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}
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