mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
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package daemon
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import (
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"os/exec"
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"strconv"
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"strings"
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"github.com/docker/docker/engine"
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)
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func (daemon *Daemon) ContainerTop(job *engine.Job) engine.Status {
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if len(job.Args) != 1 && len(job.Args) != 2 {
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return job.Errorf("Not enough arguments. Usage: %s CONTAINER [PS_ARGS]\n", job.Name)
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}
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var (
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name = job.Args[0]
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psArgs = "-ef"
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)
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if len(job.Args) == 2 && job.Args[1] != "" {
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psArgs = job.Args[1]
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}
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if container := daemon.Get(name); container != nil {
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if !container.State.IsRunning() {
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return job.Errorf("Container %s is not running", name)
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}
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pids, err := daemon.ExecutionDriver().GetPidsForContainer(container.ID)
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if err != nil {
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return job.Error(err)
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}
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output, err := exec.Command("ps", psArgs).Output()
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if err != nil {
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return job.Errorf("Error running ps: %s", err)
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}
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lines := strings.Split(string(output), "\n")
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header := strings.Fields(lines[0])
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out := &engine.Env{}
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out.SetList("Titles", header)
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pidIndex := -1
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for i, name := range header {
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if name == "PID" {
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pidIndex = i
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}
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}
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if pidIndex == -1 {
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return job.Errorf("Couldn't find PID field in ps output")
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}
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processes := [][]string{}
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for _, line := range lines[1:] {
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if len(line) == 0 {
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continue
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}
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fields := strings.Fields(line)
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p, err := strconv.Atoi(fields[pidIndex])
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if err != nil {
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return job.Errorf("Unexpected pid '%s': %s", fields[pidIndex], err)
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}
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for _, pid := range pids {
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if pid == p {
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// Make sure number of fields equals number of header titles
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// merging "overhanging" fields
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process := fields[:len(header)-1]
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process = append(process, strings.Join(fields[len(header)-1:], " "))
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processes = append(processes, process)
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}
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}
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}
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out.SetJson("Processes", processes)
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out.WriteTo(job.Stdout)
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return engine.StatusOK
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}
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return job.Errorf("No such container: %s", name)
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}
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