summaryrefslogtreecommitdiffhomepage
path: root/runsc/cmd/state.go
diff options
context:
space:
mode:
Diffstat (limited to 'runsc/cmd/state.go')
-rw-r--r--runsc/cmd/state.go76
1 files changed, 76 insertions, 0 deletions
diff --git a/runsc/cmd/state.go b/runsc/cmd/state.go
new file mode 100644
index 000000000..f0d449b19
--- /dev/null
+++ b/runsc/cmd/state.go
@@ -0,0 +1,76 @@
+// 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 (
+ "context"
+ "encoding/json"
+ "os"
+
+ "flag"
+ "github.com/google/subcommands"
+ "gvisor.googlesource.com/gvisor/pkg/log"
+ "gvisor.googlesource.com/gvisor/runsc/boot"
+ "gvisor.googlesource.com/gvisor/runsc/container"
+)
+
+// 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 container"
+}
+
+// Usage implements subcommands.Command.Usage.
+func (*State) Usage() string {
+ return `state [flags] <container id> - get the state of a container`
+}
+
+// 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)
+
+ c, err := container.Load(conf.RootDir, id)
+ if err != nil {
+ Fatalf("loading container: %v", err)
+ }
+ log.Debugf("Returning state for container %+v", c)
+
+ state := c.State()
+ log.Debugf("State: %+v", state)
+
+ // Write json-encoded state directly to stdout.
+ b, err := json.MarshalIndent(state, "", " ")
+ if err != nil {
+ Fatalf("marshaling container state: %v", err)
+ }
+ os.Stdout.Write(b)
+ return subcommands.ExitSuccess
+}