43 lines
792 B
Go
43 lines
792 B
Go
// +build darwin
|
|
|
|
package fs
|
|
|
|
import (
|
|
"io"
|
|
"os"
|
|
|
|
"github.com/pkg/errors"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
func copyFile(source, target string) error {
|
|
if err := unix.Clonefileat(unix.AT_FDCWD, source, unix.AT_FDCWD, target, unix.CLONE_NOFOLLOW); err != nil {
|
|
if err != unix.EINVAL {
|
|
return err
|
|
}
|
|
} else {
|
|
return nil
|
|
}
|
|
|
|
src, err := os.Open(source)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "failed to open source %s", source)
|
|
}
|
|
defer src.Close()
|
|
tgt, err := os.Create(target)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "failed to open target %s", target)
|
|
}
|
|
defer tgt.Close()
|
|
|
|
return copyFileContent(tgt, src)
|
|
}
|
|
|
|
func copyFileContent(dst, src *os.File) error {
|
|
buf := bufferPool.Get().(*[]byte)
|
|
_, err := io.CopyBuffer(dst, src, *buf)
|
|
bufferPool.Put(buf)
|
|
|
|
return err
|
|
}
|