forked from moby/moby
/
tmpfs.go
56 lines (52 loc) · 1.45 KB
/
tmpfs.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
package native
import (
"fmt"
"os"
"os/exec"
"strings"
"github.com/Sirupsen/logrus"
"github.com/opencontainers/runc/libcontainer/configs"
)
func genTmpfsPremountCmd(tmpDir string, fullDest string, dest string) []configs.Command {
var premount []configs.Command
tarPath, err := exec.LookPath("tar")
if err != nil {
logrus.Warn("tar command is not available for tmpfs mount: %s", err)
return premount
}
if _, err = exec.LookPath("rm"); err != nil {
logrus.Warn("rm command is not available for tmpfs mount: %s", err)
return premount
}
tarFile := fmt.Sprintf("%s/%s.tar", tmpDir, strings.Replace(dest, "/", "_", -1))
if _, err := os.Stat(fullDest); err == nil {
premount = append(premount, configs.Command{
Path: tarPath,
Args: []string{"-cf", tarFile, "-C", fullDest, "."},
})
}
return premount
}
func genTmpfsPostmountCmd(tmpDir string, fullDest string, dest string) []configs.Command {
var postmount []configs.Command
tarPath, err := exec.LookPath("tar")
if err != nil {
return postmount
}
rmPath, err := exec.LookPath("rm")
if err != nil {
return postmount
}
if _, err := os.Stat(fullDest); os.IsNotExist(err) {
return postmount
}
tarFile := fmt.Sprintf("%s/%s.tar", tmpDir, strings.Replace(dest, "/", "_", -1))
postmount = append(postmount, configs.Command{
Path: tarPath,
Args: []string{"-xf", tarFile, "-C", fullDest, "."},
})
return append(postmount, configs.Command{
Path: rmPath,
Args: []string{"-f", tarFile},
})
}