b08f071e18
Although having a request ID available throughout the codebase is very valuable, the impact of requiring a Context as an argument to every function in the codepath of an API request, is too significant and was not properly understood at the time of the review. Furthermore, mixing API-layer code with non-API-layer code makes the latter usable only by API-layer code (one that has a notion of Context). This reverts commitde41640435, reversing changes made to7daeecd42d. Signed-off-by: Tibor Vass <tibor@docker.com> Conflicts: api/server/container.go builder/internals.go daemon/container_unix.go daemon/create.go
81 lines
2 KiB
Go
81 lines
2 KiB
Go
//+build !windows
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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/api/types"
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derr "github.com/docker/docker/errors"
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)
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// ContainerTop lists the processes running inside of the given
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// container by calling ps with the given args, or with the flags
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// "-ef" if no args are given. An error is returned if the container
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// is not found, or is not running, or if there are any problems
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// running ps, or parsing the output.
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func (daemon *Daemon) ContainerTop(name string, psArgs string) (*types.ContainerProcessList, error) {
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if psArgs == "" {
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psArgs = "-ef"
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}
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container, err := daemon.Get(name)
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if err != nil {
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return nil, err
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}
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if !container.IsRunning() {
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return nil, derr.ErrorCodeNotRunning.WithArgs(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 nil, err
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}
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output, err := exec.Command("ps", strings.Split(psArgs, " ")...).Output()
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if err != nil {
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return nil, derr.ErrorCodePSError.WithArgs(err)
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}
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procList := &types.ContainerProcessList{}
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lines := strings.Split(string(output), "\n")
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procList.Titles = strings.Fields(lines[0])
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pidIndex := -1
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for i, name := range procList.Titles {
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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 nil, derr.ErrorCodeNoPID
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}
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// loop through the output and extract the PID from each line
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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 nil, derr.ErrorCodeBadPID.WithArgs(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(procList.Titles)-1]
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process = append(process, strings.Join(fields[len(procList.Titles)-1:], " "))
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procList.Processes = append(procList.Processes, process)
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}
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}
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}
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container.logEvent("top")
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return procList, nil
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}
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