mirror of
https://github.com/podman-container-tools/podman.git
synced 2026-08-26 18:27:53 +00:00
115 lines
3.4 KiB
Go
115 lines
3.4 KiB
Go
package containers
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import (
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"context"
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"fmt"
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"os"
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"strings"
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"text/tabwriter"
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"github.com/containers/podman/v2/cmd/podman/common"
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"github.com/containers/podman/v2/cmd/podman/registry"
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"github.com/containers/podman/v2/cmd/podman/validate"
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"github.com/containers/podman/v2/pkg/domain/entities"
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"github.com/containers/podman/v2/pkg/util"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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)
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var (
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topDescription = `Display the running processes of a container.
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The top command extends the ps(1) compatible AIX descriptors with container-specific ones as shown below. In the presence of ps(1) specific flags (e.g, -eo), Podman will execute ps(1) inside the container.
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`
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topOptions = entities.TopOptions{}
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topCommand = &cobra.Command{
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Use: "top [options] CONTAINER [FORMAT-DESCRIPTORS|ARGS...]",
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Short: "Display the running processes of a container",
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Long: topDescription,
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RunE: top,
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Args: cobra.ArbitraryArgs,
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ValidArgsFunction: common.AutocompleteTopCmd,
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Example: `podman top ctrID
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podman top --latest
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podman top ctrID pid seccomp args %C
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podman top ctrID -eo user,pid,comm`,
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}
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containerTopCommand = &cobra.Command{
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Use: topCommand.Use,
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Short: topCommand.Short,
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Long: topCommand.Long,
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RunE: topCommand.RunE,
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ValidArgsFunction: topCommand.ValidArgsFunction,
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Example: `podman container top ctrID
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podman container top --latest
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podman container top ctrID pid seccomp args %C
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podman container top ctrID -eo user,pid,comm`,
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}
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)
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func topFlags(flags *pflag.FlagSet) {
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flags.SetInterspersed(false)
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flags.BoolVar(&topOptions.ListDescriptors, "list-descriptors", false, "")
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_ = flags.MarkHidden("list-descriptors") // meant only for bash completion
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}
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func init() {
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registry.Commands = append(registry.Commands, registry.CliCommand{
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Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
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Command: topCommand,
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})
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topFlags(topCommand.Flags())
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validate.AddLatestFlag(topCommand, &topOptions.Latest)
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descriptors, err := util.GetContainerPidInformationDescriptors()
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if err == nil {
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topDescription = fmt.Sprintf("%s\n\n Format Descriptors:\n %s", topDescription, strings.Join(descriptors, ","))
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topCommand.Long = topDescription
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}
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registry.Commands = append(registry.Commands, registry.CliCommand{
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Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
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Command: containerTopCommand,
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Parent: containerCmd,
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})
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topFlags(containerTopCommand.Flags())
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validate.AddLatestFlag(containerTopCommand, &topOptions.Latest)
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}
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func top(cmd *cobra.Command, args []string) error {
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if topOptions.ListDescriptors {
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descriptors, err := util.GetContainerPidInformationDescriptors()
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if err != nil {
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return err
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}
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fmt.Println(strings.Join(descriptors, "\n"))
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return nil
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}
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if len(args) < 1 && !topOptions.Latest {
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return errors.Errorf("you must provide the name or id of a running container")
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}
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if topOptions.Latest {
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topOptions.Descriptors = args
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} else {
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topOptions.NameOrID = args[0]
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topOptions.Descriptors = args[1:]
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}
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topResponse, err := registry.ContainerEngine().ContainerTop(context.Background(), topOptions)
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if err != nil {
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return err
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}
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w := tabwriter.NewWriter(os.Stdout, 5, 1, 3, ' ', 0)
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for _, proc := range topResponse.Value {
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if _, err := fmt.Fprintln(w, proc); err != nil {
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return err
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}
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}
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return w.Flush()
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}
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