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// Copyright 2022 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 trace
import (
"context"
"encoding/json"
"fmt"
"github.com/google/subcommands"
"gvisor.dev/gvisor/pkg/log"
"gvisor.dev/gvisor/runsc/cmd/util"
"gvisor.dev/gvisor/runsc/config"
"gvisor.dev/gvisor/runsc/container"
"gvisor.dev/gvisor/runsc/flag"
)
// procfs implements subcommands.Command for the "procfs" command.
type procfs struct {
}
// Name implements subcommands.Command.
func (*procfs) Name() string {
return "procfs"
}
// Synopsis implements subcommands.Command.
func (*procfs) Synopsis() string {
return "dump procfs state for sandbox"
}
// Usage implements subcommands.Command.
func (*procfs) Usage() string {
return `procfs <sandbox id> - get procfs dump for a trace session
`
}
// SetFlags implements subcommands.Command.
func (*procfs) SetFlags(*flag.FlagSet) {}
// Execute implements subcommands.Command.
func (*procfs) Execute(_ context.Context, f *flag.FlagSet, args ...any) subcommands.ExitStatus {
if f.NArg() != 1 {
f.Usage()
return subcommands.ExitUsageError
}
id := f.Arg(0)
conf := args[0].(*config.Config)
opts := container.LoadOpts{
SkipCheck: true,
RootContainer: true,
}
c, err := container.Load(conf.RootDir, container.FullID{ContainerID: id}, opts)
if err != nil {
util.Fatalf("loading sandbox: %v", err)
}
dump, err := c.Sandbox.ProcfsDump()
if err != nil {
util.Fatalf("procfs dump: %v", err)
}
fmt.Println("PROCFS DUMP")
for _, procDump := range dump {
out, err := json.Marshal(procDump)
if err != nil {
log.Warningf("json.Marshal failed to marshal %+v: %v", procDump, err)
continue
}
fmt.Println("")
fmt.Println(string(out))
}
return subcommands.ExitSuccess
}
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