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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
package ldd
import (
"bytes"
"context"
"io"
"os"
"os/exec"
"time"
"hakurei.app/container"
"hakurei.app/container/check"
"hakurei.app/container/comp"
"hakurei.app/container/fhs"
"hakurei.app/container/seccomp"
"hakurei.app/message"
)
var (
msgStatic = []byte("Not a valid dynamic program")
msgStaticGlibc = []byte("not a dynamic executable")
)
func Exec(ctx context.Context, msg message.Msg, p string) ([]*Entry, error) {
const (
lddName = "ldd"
lddTimeout = 4 * time.Second
)
c, cancel := context.WithTimeout(ctx, lddTimeout)
defer cancel()
var toolPath *check.Absolute
if s, err := exec.LookPath(lddName); err != nil {
return nil, err
} else if toolPath, err = check.NewAbs(s); err != nil {
return nil, err
}
z := container.NewCommand(c, msg, toolPath, lddName, p)
z.Hostname = "hakurei-" + lddName
z.SeccompFlags |= seccomp.AllowMultiarch
z.SeccompPresets |= comp.PresetStrict
stdout, stderr := new(bytes.Buffer), new(bytes.Buffer)
z.Stdout = stdout
z.Stderr = stderr
z.
Bind(fhs.AbsRoot, fhs.AbsRoot, 0).
Proc(fhs.AbsProc).
Dev(fhs.AbsDev, false)
if err := z.Start(); err != nil {
return nil, err
}
defer func() { _, _ = io.Copy(os.Stderr, stderr) }()
if err := z.Serve(); err != nil {
return nil, err
}
if err := z.Wait(); err != nil {
m := stderr.Bytes()
if bytes.Contains(m, append([]byte(p+": "), msgStatic...)) ||
bytes.Contains(m, msgStaticGlibc) {
return nil, nil
}
return nil, err
}
v := stdout.Bytes()
return Parse(v)
}
|
