Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 73 insertions, 0 deletions

diff --git a/runsc/cmd/state.go b/runsc/cmd/state.go
new file mode 100644
index 000000000..0b47f290a
--- /dev/null
+++ b/runsc/cmd/state.go
@@ -0,0 +1,73 @@
+// Copyright 2018 Google Inc.
+//
+// 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 (
+	"encoding/json"
+	"os"
+
+	"context"
+	"flag"
+	"github.com/google/subcommands"
+	"gvisor.googlesource.com/gvisor/pkg/log"
+	"gvisor.googlesource.com/gvisor/runsc/boot"
+	"gvisor.googlesource.com/gvisor/runsc/sandbox"
+)
+
+// State implements subcommands.Command for the "state" command.
+type State struct{}
+
+// Name implements subcommands.Command.Name.
+func (*State) Name() string {
+	return "state"
+}
+
+// Synopsis implements subcommands.Command.Synopsis.
+func (*State) Synopsis() string {
+	return "get the state of a sandbox"
+}
+
+// Usage implements subcommands.Command.Usage.
+func (*State) Usage() string {
+	return `state [flags] <container id> - get the state of a sandbox`
+}
+
+// SetFlags implements subcommands.Command.SetFlags.
+func (*State) SetFlags(f *flag.FlagSet) {}
+
+// Execute implements subcommands.Command.Execute.
+func (*State) Execute(_ context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus {
+	if f.NArg() != 1 {
+		f.Usage()
+		return subcommands.ExitUsageError
+	}
+
+	id := f.Arg(0)
+	conf := args[0].(*boot.Config)
+
+	s, err := sandbox.Load(conf.RootDir, id)
+	if err != nil {
+		Fatalf("error loading sandbox: %v", err)
+	}
+	log.Debugf("Returning state %+v", s)
+
+	// Write json-encoded state directly to stdout.
+	b, err := json.MarshalIndent(s.State(), "", "  ")
+	if err != nil {
+		Fatalf("error marshaling sandbox state: %v", err)
+	}
+	os.Stdout.Write(b)
+	return subcommands.ExitSuccess
+}