File: reflink_linux.go

package info (click to toggle)
golang-github-containers-storage 1.59.1%2Bds1-2
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 4,184 kB
  • sloc: sh: 630; ansic: 389; makefile: 143; awk: 12
file content (20 lines) | stat: -rw-r--r-- 390 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
package fileutils

import (
	"io"
	"os"

	"golang.org/x/sys/unix"
)

// ReflinkOrCopy attempts to reflink the source to the destination fd.
// If reflinking fails or is unsupported, it falls back to io.Copy().
func ReflinkOrCopy(src, dst *os.File) error {
	err := unix.IoctlFileClone(int(dst.Fd()), int(src.Fd()))
	if err == nil {
		return nil
	}

	_, err = io.Copy(dst, src)
	return err
}