beenull/moby
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

cp's -T and --reflink=auto are only available on GNU coreutils

Browse source 
Docker-DCO-1.1-Signed-off-by: Kato Kazuyoshi <kato.kazuyoshi@gmail.com> (github: kzys)
This commit is contained in:
Kato Kazuyoshi 2014-06-21 18:50:52 +09:00
parent f1ac8962f9
commit 733711481e
1 changed files with 18 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
daemon/graphdriver/vfs/driver.go
View file

@ -1,6 +1,7 @@
package vfs
import (
"bytes"
"fmt"
"github.com/dotcloud/docker/daemon/graphdriver"
"os"
@ -35,8 +36,24 @@ func (d *Driver) Cleanup() error {
return nil
}
func isGNUcoreutils() bool {
if stdout, err := exec.Command("cp", "--version").Output(); err == nil {
return bytes.Contains(stdout, []byte("GNU coreutils"))
}
return false
}
func copyDir(src, dst string) error {
if output, err := exec.Command("cp", "-aT", "--reflink=auto", src, dst).CombinedOutput(); err != nil {
argv := make([]string, 0, 4)
if isGNUcoreutils() {
argv = append(argv, "-aT", "--reflink=auto", src, dst)
} else {
argv = append(argv, "-a", src+"/.", dst+"/.")
}
if output, err := exec.Command("cp", argv...).CombinedOutput(); err != nil {
return fmt.Errorf("Error VFS copying directory: %s (%s)", err, output)
}
return nil