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/
ps.go
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/
ps.go
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// Copyright (c) 2014,2015,2016 Docker, Inc.
// Copyright (c) 2017 Intel Corporation
//
// SPDX-License-Identifier: Apache-2.0
//
package main
import (
"context"
"fmt"
"github.com/kata-containers/runtime/pkg/katautils"
vc "github.com/kata-containers/runtime/virtcontainers"
"github.com/kata-containers/runtime/virtcontainers/types"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var psCLICommand = cli.Command{
Name: "ps",
Usage: "ps displays the processes running inside a container",
ArgsUsage: `<container-id> [ps options]`,
Flags: []cli.Flag{
cli.StringFlag{
Name: "format, f",
Value: "table",
Usage: `select one of: ` + formatOptions,
},
},
Action: func(context *cli.Context) error {
ctx, err := cliContextToContext(context)
if err != nil {
return err
}
if !context.Args().Present() {
return fmt.Errorf("Missing container ID, should at least provide one")
}
var args []string
if len(context.Args()) > 1 {
// [1:] is to remove container_id:
// context.Args(): [container_id ps_arg1 ps_arg2 ...]
// args: [ps_arg1 ps_arg2 ...]
args = context.Args()[1:]
}
return ps(ctx, context.Args().First(), context.String("format"), args)
},
SkipArgReorder: true,
}
func ps(ctx context.Context, containerID, format string, args []string) error {
span, _ := katautils.Trace(ctx, "ps")
defer span.Finish()
if containerID == "" {
return fmt.Errorf("Missing container ID")
}
kataLog = kataLog.WithField("container", containerID)
setExternalLoggers(ctx, kataLog)
span.SetTag("container", containerID)
// Checks the MUST and MUST NOT from OCI runtime specification
status, sandboxID, err := getExistingContainerInfo(ctx, containerID)
if err != nil {
return err
}
containerID = status.ID
kataLog = kataLog.WithFields(logrus.Fields{
"container": containerID,
"sandbox": sandboxID,
})
setExternalLoggers(ctx, kataLog)
span.SetTag("container", containerID)
span.SetTag("sandbox", sandboxID)
// container MUST be running
if status.State.State != types.StateRunning {
return fmt.Errorf("Container %s is not running", containerID)
}
var options vc.ProcessListOptions
options.Args = args
if len(options.Args) == 0 {
options.Args = []string{"-ef"}
}
options.Format = format
msg, err := vci.ProcessListContainer(ctx, sandboxID, containerID, options)
if err != nil {
return err
}
fmt.Print(string(msg))
return nil
}