// 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" "flag" "github.com/google/subcommands" "gvisor.dev/gvisor/runsc/boot" "gvisor.dev/gvisor/runsc/container" ) // Pause implements subcommands.Command for the "pause" command. type Pause struct{} // Name implements subcommands.Command.Name. func (*Pause) Name() string { return "pause" } // Synopsis implements subcommands.Command.Synopsis. func (*Pause) Synopsis() string { return "pause suspends all processes in a container" } // Usage implements subcommands.Command.Usage. func (*Pause) Usage() string { return `pause <container id> - pause process in instance of container.` } // SetFlags implements subcommands.Command.SetFlags. func (*Pause) SetFlags(f *flag.FlagSet) { } // Execute implements subcommands.Command.Execute. func (*Pause) 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) cont, err := container.Load(conf.RootDir, id) if err != nil { Fatalf("loading container: %v", err) } if err := cont.Pause(); err != nil { Fatalf("pause failed: %v", err) } return subcommands.ExitSuccess }