package main import ( "fmt" "os" "strings" "text/tabwriter" "github.com/containers/libpod/cmd/podman/libpodruntime" "github.com/containers/libpod/libpod" "github.com/containers/libpod/pkg/rootless" "github.com/pkg/errors" "github.com/urfave/cli" ) func getDescriptorString() string { descriptors, err := libpod.GetContainerPidInformationDescriptors() if err == nil { return fmt.Sprintf(` Format Descriptors: %s`, strings.Join(descriptors, ",")) } return "" } var ( topFlags = []cli.Flag{ LatestFlag, cli.BoolFlag{ Name: "list-descriptors", Hidden: true, }, } topDescription = fmt.Sprintf(`Display the running processes of the container. Specify format descriptors to alter the output. You may run "podman top -l pid pcpu seccomp" to print the process ID, the CPU percentage and the seccomp mode of each process of the latest container. %s `, getDescriptorString()) topCommand = cli.Command{ Name: "top", Usage: "Display the running processes of a container", Description: topDescription, Flags: sortFlags(topFlags), Action: topCmd, ArgsUsage: "CONTAINER-NAME [format descriptors]", SkipArgReorder: true, OnUsageError: usageErrorHandler, } ) func topCmd(c *cli.Context) error { var container *libpod.Container var err error args := c.Args() if c.Bool("list-descriptors") { descriptors, err := libpod.GetContainerPidInformationDescriptors() if err != nil { return err } fmt.Println(strings.Join(descriptors, "\n")) return nil } if len(args) < 1 && !c.Bool("latest") { return errors.Errorf("you must provide the name or id of a running container") } if err := validateFlags(c, topFlags); err != nil { return err } rootless.SetSkipStorageSetup(true) runtime, err := libpodruntime.GetRuntime(c) if err != nil { return errors.Wrapf(err, "error creating libpod runtime") } defer runtime.Shutdown(false) var descriptors []string if c.Bool("latest") { descriptors = args container, err = runtime.GetLatestContainer() } else { descriptors = args[1:] container, err = runtime.LookupContainer(args[0]) } if err != nil { return errors.Wrapf(err, "unable to lookup requested container") } conStat, err := container.State() if err != nil { return errors.Wrapf(err, "unable to look up state for %s", args[0]) } if conStat != libpod.ContainerStateRunning { return errors.Errorf("top can only be used on running containers") } pid, err := container.PID() if err != nil { return err } became, ret, err := rootless.JoinNS(uint(pid)) if err != nil { return err } if became { os.Exit(ret) } psOutput, err := container.GetContainerPidInformation(descriptors) if err != nil { return err } w := tabwriter.NewWriter(os.Stdout, 5, 1, 3, ' ', 0) for _, proc := range psOutput { fmt.Fprintln(w, proc) } w.Flush() return nil }