mirror of
https://github.com/containers/podman.git
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b1e709806d
Make the output of top tabular to be compatible with Docker. Please note, that any user-input for `GetContainerPidInformation(...)` will be ignored until we have found a way to generically and reliably parse ps-1 output or until there is a go-lib to extract all the data from /proc in a ps-1 compatible fashion. Fixes: #458 Signed-off-by: Valentin Rothberg <vrothberg@suse.com> Closes: #939 Approved by: rhatdan
82 lines
1.7 KiB
Go
82 lines
1.7 KiB
Go
package main
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import (
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"fmt"
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"os"
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"text/tabwriter"
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"github.com/pkg/errors"
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"github.com/projectatomic/libpod/cmd/podman/libpodruntime"
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"github.com/projectatomic/libpod/libpod"
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"github.com/urfave/cli"
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)
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var (
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topFlags = []cli.Flag{
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LatestFlag,
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}
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topDescription = `
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podman top
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Display the running processes of the container.
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`
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topCommand = cli.Command{
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Name: "top",
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Usage: "Display the running processes of a container",
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Description: topDescription,
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Flags: topFlags,
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Action: topCmd,
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ArgsUsage: "CONTAINER-NAME",
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SkipArgReorder: true,
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}
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)
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func topCmd(c *cli.Context) error {
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var container *libpod.Container
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var err error
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args := c.Args()
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if len(args) < 1 && !c.Bool("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 err := validateFlags(c, topFlags); err != nil {
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return err
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}
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runtime, err := libpodruntime.GetRuntime(c)
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if err != nil {
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return errors.Wrapf(err, "error creating libpod runtime")
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}
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defer runtime.Shutdown(false)
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if c.Bool("latest") {
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container, err = runtime.GetLatestContainer()
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} else {
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container, err = runtime.LookupContainer(args[0])
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}
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if err != nil {
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return errors.Wrapf(err, "unable to lookup %s", args[0])
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}
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conStat, err := container.State()
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if err != nil {
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return errors.Wrapf(err, "unable to look up state for %s", args[0])
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}
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if conStat != libpod.ContainerStateRunning {
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return errors.Errorf("top can only be used on running containers")
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}
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psOutput, err := container.GetContainerPidInformation([]string{})
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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, 20, 1, 3, ' ', 0)
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for _, proc := range psOutput {
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fmt.Fprintln(w, proc)
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}
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w.Flush()
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return nil
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}
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