Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 117 insertions, 0 deletions

diff --git a/runsc/cmd/list.go b/runsc/cmd/list.go
new file mode 100644
index 000000000..bf7cb41bb
--- /dev/null
+++ b/runsc/cmd/list.go
@@ -0,0 +1,117 @@
+// 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"
+	"fmt"
+	"os"
+	"text/tabwriter"
+	"time"
+
+	"context"
+	"flag"
+	"github.com/google/subcommands"
+	specs "github.com/opencontainers/runtime-spec/specs-go"
+	"gvisor.googlesource.com/gvisor/runsc/boot"
+	"gvisor.googlesource.com/gvisor/runsc/sandbox"
+)
+
+// List implements subcommands.Command for the "list" command for the "list" command.
+type List struct {
+	quiet  bool
+	format string
+}
+
+// Name implements subcommands.command.name.
+func (*List) Name() string {
+	return "list"
+}
+
+// Synopsis implements subcommands.Command.Synopsis.
+func (*List) Synopsis() string {
+	return "list contaners started by runsc with the given root"
+}
+
+// Usage implements subcommands.Command.Usage.
+func (*List) Usage() string {
+	return `list [flags]`
+}
+
+// SetFlags implements subcommands.Command.SetFlags.
+func (l *List) SetFlags(f *flag.FlagSet) {
+	f.BoolVar(&l.quiet, "quiet", false, "only list container ids")
+	f.StringVar(&l.format, "format", "text", "output format: 'text' (default) or 'json'")
+}
+
+// Execute implements subcommands.Command.Execute.
+func (l *List) Execute(_ context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus {
+	if f.NArg() != 0 {
+		f.Usage()
+		return subcommands.ExitUsageError
+	}
+
+	conf := args[0].(*boot.Config)
+	ids, err := sandbox.List(conf.RootDir)
+	if err != nil {
+		Fatalf("%v", err)
+	}
+
+	if l.quiet {
+		for _, id := range ids {
+			fmt.Println(id)
+		}
+		return subcommands.ExitSuccess
+	}
+
+	// Collect the sandboxes.
+	var sandboxes []*sandbox.Sandbox
+	for _, id := range ids {
+		s, err := sandbox.Load(conf.RootDir, id)
+		if err != nil {
+			Fatalf("error loading sandbox %q: %v", id, err)
+		}
+		sandboxes = append(sandboxes, s)
+	}
+
+	switch l.format {
+	case "text":
+		// Print a nice table.
+		w := tabwriter.NewWriter(os.Stdout, 12, 1, 3, ' ', 0)
+		fmt.Fprint(w, "ID\tPID\tSTATUS\tBUNDLE\tCREATED\tOWNER\n")
+		for _, s := range sandboxes {
+			fmt.Fprintf(w, "%s\t%d\t%s\t%s\t%s\t%s\n",
+				s.ID,
+				s.Pid,
+				s.Status,
+				s.BundleDir,
+				s.CreatedAt.Format(time.RFC3339Nano),
+				s.Owner)
+		}
+		w.Flush()
+	case "json":
+		// Print just the states.
+		var states []specs.State
+		for _, s := range sandboxes {
+			states = append(states, s.State())
+		}
+		if err := json.NewEncoder(os.Stdout).Encode(states); err != nil {
+			Fatalf("error marshaling sandbox state: %v", err)
+		}
+	default:
+		Fatalf("unknown list format %q", l.format)
+	}
+	return subcommands.ExitSuccess
+}