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package devices
import (
"os"
"path"
"testing"
"github.com/moby/sys/userns"
"github.com/opencontainers/cgroups"
devices "github.com/opencontainers/cgroups/devices/config"
"github.com/opencontainers/cgroups/fscommon"
)
func init() {
testingSkipFinalCheck = true
cgroups.TestMode = true
}
func TestSetV1Allow(t *testing.T) {
if userns.RunningInUserNS() {
t.Skip("userns detected; setV1 does nothing")
}
dir := t.TempDir()
for file, contents := range map[string]string{
"devices.allow": "",
"devices.deny": "",
"devices.list": "a *:* rwm",
} {
err := os.WriteFile(path.Join(dir, file), []byte(contents), 0o600)
if err != nil {
t.Fatal(err)
}
}
r := &cgroups.Resources{
Devices: []*devices.Rule{
{
Type: devices.CharDevice,
Major: 1,
Minor: 5,
Permissions: devices.Permissions("rwm"),
Allow: true,
},
},
}
if err := setV1(dir, r); err != nil {
t.Fatal(err)
}
// The default deny rule must be written.
value, err := fscommon.GetCgroupParamString(dir, "devices.deny")
if err != nil {
t.Fatal(err)
}
if value[0] != 'a' {
t.Errorf("Got the wrong value (%q), set devices.deny failed.", value)
}
// Permitted rule must be written.
if value, err := fscommon.GetCgroupParamString(dir, "devices.allow"); err != nil {
t.Fatal(err)
} else if value != "c 1:5 rwm" {
t.Errorf("Got the wrong value (%q), set devices.allow failed.", value)
}
}
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