mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
I Hsin Cheng
83f9f18776
Originally, some of the commands' usage display didn't achieved to show newline, while some of them does, which are more user-friendly, and won't confuse the message if there're more which should be in the nextline. Fix this issue by returning usage string with a newline. Signed-off-by: I Hsin Cheng <richard120310@gmail.com>
95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
// Copyright 2021 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cmd
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import (
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"context"
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"encoding/json"
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"github.com/google/subcommands"
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"gvisor.dev/gvisor/runsc/cmd/util"
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"gvisor.dev/gvisor/runsc/config"
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"gvisor.dev/gvisor/runsc/container"
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"gvisor.dev/gvisor/runsc/flag"
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)
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// Usage implements subcommands.Command for the "usage" command.
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type Usage struct {
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full bool
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fd bool
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}
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// Name implements subcommands.Command.Name.
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func (*Usage) Name() string {
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return "usage"
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}
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// Synopsis implements subcommands.Command.Synopsis.
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func (*Usage) Synopsis() string {
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return "Usage shows application memory usage across various categories in bytes."
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}
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// Usage implements subcommands.Command.Usage.
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func (*Usage) Usage() string {
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return "usage [flags] <container id> - print memory usages to standard output.\n"
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}
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// SetFlags implements subcommands.Command.SetFlags.
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func (u *Usage) SetFlags(f *flag.FlagSet) {
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f.BoolVar(&u.full, "full", false, "enumerate all usage by categories")
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f.BoolVar(&u.fd, "fd", false, "retrieves a subset of usage through the established usage FD")
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}
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// Execute implements subcommands.Command.Execute.
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func (u *Usage) Execute(_ context.Context, f *flag.FlagSet, args ...any) subcommands.ExitStatus {
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if f.NArg() < 1 {
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f.Usage()
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return subcommands.ExitUsageError
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}
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id := f.Arg(0)
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conf := args[0].(*config.Config)
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cont, err := container.Load(conf.RootDir, container.FullID{ContainerID: id}, container.LoadOpts{SkipCheck: true})
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if err != nil {
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util.Fatalf("loading container: %v", err)
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}
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if u.fd {
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m, err := cont.Sandbox.UsageFD()
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if err != nil {
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util.Fatalf("usagefd failed: %v", err)
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}
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mapped, unknown, total, err := m.Fetch()
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if err != nil {
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util.Fatalf("Fetch memory usage failed: %v", err)
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}
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util.Infof("Mapped %v, Unknown %v, Total %v\n", mapped, unknown, total)
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} else {
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m, err := cont.Sandbox.Usage(u.full)
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if err != nil {
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util.Fatalf("usage failed: %v", err)
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}
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encoder := json.NewEncoder(&util.Writer{})
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encoder.SetIndent("", " ")
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if err := encoder.Encode(m); err != nil {
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util.Fatalf("Encode MemoryUsage failed: %v", err)
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}
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}
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return subcommands.ExitSuccess
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}
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