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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"flag"
"fmt"
"os"
"testing"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/syndtr/gocapability/capability"
"gvisor.dev/gvisor/pkg/log"
"gvisor.dev/gvisor/pkg/test/testutil"
"gvisor.dev/gvisor/runsc/config"
"gvisor.dev/gvisor/runsc/container"
"gvisor.dev/gvisor/runsc/specutils"
)
func init() {
log.SetLevel(log.Debug)
if err := testutil.ConfigureExePath(); err != nil {
panic(err.Error())
}
}
func checkProcessCaps(pid int, wantCaps *specs.LinuxCapabilities) error {
curCaps, err := capability.NewPid2(pid)
if err != nil {
return fmt.Errorf("capability.NewPid2(%d) failed: %v", pid, err)
}
if err := curCaps.Load(); err != nil {
return fmt.Errorf("unable to load capabilities: %v", err)
}
fmt.Printf("Capabilities (PID: %d): %v\n", pid, curCaps)
for _, c := range allCapTypes {
if err := checkCaps(c, curCaps, wantCaps); err != nil {
return err
}
}
return nil
}
func checkCaps(which capability.CapType, curCaps capability.Capabilities, wantCaps *specs.LinuxCapabilities) error {
wantNames := getCaps(which, wantCaps)
for name, c := range capFromName {
want := specutils.ContainsStr(wantNames, name)
got := curCaps.Get(which, c)
if want != got {
if want {
return fmt.Errorf("capability %v:%s should be set", which, name)
}
return fmt.Errorf("capability %v:%s should NOT be set", which, name)
}
}
return nil
}
func TestCapabilities(t *testing.T) {
stop := testutil.StartReaper()
defer stop()
spec := testutil.NewSpecWithArgs("/bin/sleep", "10000")
caps := []string{
"CAP_CHOWN",
"CAP_SYS_PTRACE", // ptrace is added due to the platform choice.
}
spec.Process.Capabilities = &specs.LinuxCapabilities{
Permitted: caps,
Bounding: caps,
Effective: caps,
Inheritable: caps,
}
conf := testutil.TestConfig(t)
// Use --network=host to make sandbox use spec's capabilities.
conf.Network = config.NetworkHost
_, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf)
if err != nil {
t.Fatalf("error setting up container: %v", err)
}
defer cleanup()
// Create and start the container.
args := container.Args{
ID: testutil.RandomContainerID(),
Spec: spec,
BundleDir: bundleDir,
}
c, err := container.New(conf, args)
if err != nil {
t.Fatalf("error creating container: %v", err)
}
defer c.Destroy()
if err := c.Start(conf); err != nil {
t.Fatalf("error starting container: %v", err)
}
// Check that sandbox and gofer have the proper capabilities.
if err := checkProcessCaps(c.Sandbox.Pid, spec.Process.Capabilities); err != nil {
t.Error(err)
}
if err := checkProcessCaps(c.GoferPid, goferCaps); err != nil {
t.Error(err)
}
}
func TestMain(m *testing.M) {
flag.Parse()
if err := specutils.MaybeRunAsRoot(); err != nil {
fmt.Fprintf(os.Stderr, "Error running as root: %v", err)
os.Exit(123)
}
os.Exit(m.Run())
}
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