Merge pull request #2252 from rhatdan/system

Add podman system prune and info commands

cmd/podman/attach.go

@@ -21,7 +21,7 @@ var (
 		},
 		cli.BoolTFlag{
 			Name:  "sig-proxy",
-			Usage: "proxy received signals to the process (default true)",
+			Usage: "Proxy received signals to the process (default true)",
 		},
 		LatestFlag,
 	}

cmd/podman/build.go

@@ -25,7 +25,7 @@ var (
 		},
 		cli.BoolTFlag{
 			Name:  "layers",
-			Usage: "cache intermediate layers during build. Use BUILDAH_LAYERS environment variable to override. ",
+			Usage: "Cache intermediate layers during build. Use BUILDAH_LAYERS environment variable to override. ",
 		},
 	}
 	buildDescription = "Builds an OCI or Docker image using instructions from one\n" +

cmd/podman/checkpoint.go

@@ -21,19 +21,19 @@ var (
 	checkpointFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "keep, k",
-			Usage: "keep all temporary checkpoint files",
+			Usage: "Keep all temporary checkpoint files",
 		},
 		cli.BoolFlag{
 			Name:  "leave-running, R",
-			Usage: "leave the container running after writing checkpoint to disk",
+			Usage: "Leave the container running after writing checkpoint to disk",
 		},
 		cli.BoolFlag{
 			Name:  "tcp-established",
-			Usage: "checkpoint a container with established TCP connections",
+			Usage: "Checkpoint a container with established TCP connections",
 		},
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "checkpoint all running containers",
+			Usage: "Checkpoint all running containers",
 		},
 		LatestFlag,
 	}

cmd/podman/commands.go

@@ -53,6 +53,10 @@ func getImageSubCommands() []cli.Command {
 	}
 }
 
+func getSystemSubCommands() []cli.Command {
+	return []cli.Command{infoCommand}
+}
+
 func getContainerSubCommands() []cli.Command {
 	return []cli.Command{
 		attachCommand,
@@ -91,58 +95,58 @@ func getMainAppFlags() []cli.Flag {
 	return []cli.Flag{
 		cli.StringFlag{
 			Name:  "cgroup-manager",
-			Usage: "cgroup manager to use (cgroupfs or systemd, default systemd)",
+			Usage: "Cgroup manager to use (cgroupfs or systemd, default systemd)",
 		},
 		cli.StringFlag{
 			Name:  "cni-config-dir",
-			Usage: "path of the configuration directory for CNI networks",
+			Usage: "Path of the configuration directory for CNI networks",
 		},
 		cli.StringFlag{
 			Name:  "conmon",
-			Usage: "path of the conmon binary",
+			Usage: "Path of the conmon binary",
 		},
 		cli.StringFlag{
 			Name:   "default-mounts-file",
-			Usage:  "path to default mounts file",
+			Usage:  "Path to default mounts file",
 			Hidden: true,
 		},
 		cli.StringSliceFlag{
 			Name:  "hooks-dir",
-			Usage: "set the OCI hooks directory path (may be set multiple times)",
+			Usage: "Set the OCI hooks directory path (may be set multiple times)",
 		},
 		cli.IntFlag{
 			Name:   "max-workers",
-			Usage:  "the maximum number of workers for parallel operations",
+			Usage:  "The maximum number of workers for parallel operations",
 			Hidden: true,
 		},
 		cli.StringFlag{
 			Name:  "namespace",
-			Usage: "set the libpod namespace, used to create separate views of the containers and pods on the system",
+			Usage: "Set the libpod namespace, used to create separate views of the containers and pods on the system",
 			Value: "",
 		},
 		cli.StringFlag{
 			Name:  "root",
-			Usage: "path to the root directory in which data, including images, is stored",
+			Usage: "Path to the root directory in which data, including images, is stored",
 		},
 		cli.StringFlag{
 			Name:  "runroot",
-			Usage: "path to the 'run directory' where all state information is stored",
+			Usage: "Path to the 'run directory' where all state information is stored",
 		},
 		cli.StringFlag{
 			Name:  "runtime",
-			Usage: "path to the OCI-compatible binary used to run containers, default is /usr/bin/runc",
+			Usage: "Path to the OCI-compatible binary used to run containers, default is /usr/bin/runc",
 		},
 		cli.StringFlag{
 			Name:  "storage-driver, s",
-			Usage: "select which storage driver is used to manage storage of images and containers (default is overlay)",
+			Usage: "Select which storage driver is used to manage storage of images and containers (default is overlay)",
 		},
 		cli.StringSliceFlag{
 			Name:  "storage-opt",
-			Usage: "used to pass an option to the storage driver",
+			Usage: "Used to pass an option to the storage driver",
 		},
 		cli.BoolFlag{
 			Name:  "syslog",
-			Usage: "output logging information to syslog as well as the console",
+			Usage: "Output logging information to syslog as well as the console",
 		},
 	}
 }

cmd/podman/commands_remoteclient.go

@@ -16,6 +16,10 @@ func getContainerSubCommands() []cli.Command {
 	return []cli.Command{}
 }
 
+func getSystemSubCommands() []cli.Command {
+	return []cli.Command{}
+}
+
 func getMainAppFlags() []cli.Flag {
 	return []cli.Flag{}
 }

cmd/podman/common.go

@@ -22,11 +22,11 @@ var (
 	stores     = make(map[storage.Store]struct{})
 	LatestFlag = cli.BoolFlag{
 		Name:  "latest, l",
-		Usage: "act on the latest container podman is aware of",
+		Usage: "Act on the latest container podman is aware of",
 	}
 	LatestPodFlag = cli.BoolFlag{
 		Name:  "latest, l",
-		Usage: "act on the latest pod podman is aware of",
+		Usage: "Act on the latest pod podman is aware of",
 	}
 	WorkDirFlag = cli.StringFlag{
 		Name:  "workdir, w",
@@ -213,7 +213,7 @@ var createFlags = []cli.Flag{
 	},
 	cli.StringFlag{
 		Name:  "conmon-pidfile",
-		Usage: "path to the file that will receive the PID of conmon",
+		Usage: "Path to the file that will receive the PID of conmon",
 	},
 	cli.Uint64Flag{
 		Name:  "cpu-period",

cmd/podman/containers_prune.go

@@ -1,9 +1,11 @@
 package main
 
 import (
-	"github.com/containers/libpod/cmd/podman/libpodruntime"
+	"context"
+
 	"github.com/containers/libpod/cmd/podman/shared"
 	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/libpod/adapter"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
@@ -25,20 +27,11 @@ var (
 	}
 )
 
-func pruneContainersCmd(c *cli.Context) error {
-	var (
-		deleteFuncs []shared.ParallelWorkerInput
-	)
-
-	ctx := getContext()
-	runtime, err := libpodruntime.GetRuntime(c)
-	if err != nil {
-		return errors.Wrapf(err, "could not get runtime")
-	}
-	defer runtime.Shutdown(false)
+func pruneContainers(runtime *adapter.LocalRuntime, ctx context.Context, maxWorkers int, force bool) error {
+	var deleteFuncs []shared.ParallelWorkerInput
 
 	filter := func(c *libpod.Container) bool {
-		state, _ := c.State()
+		state, err := c.State()
 		if state == libpod.ContainerStateStopped || (state == libpod.ContainerStateExited && err == nil && c.PodID() == "") {
 			return true
 		}
@@ -54,7 +47,7 @@ func pruneContainersCmd(c *cli.Context) error {
 	for _, container := range delContainers {
 		con := container
 		f := func() error {
-			return runtime.RemoveContainer(ctx, con, c.Bool("force"))
+			return runtime.RemoveContainer(ctx, con, force)
 		}
 
 		deleteFuncs = append(deleteFuncs, shared.ParallelWorkerInput{
@@ -62,13 +55,23 @@ func pruneContainersCmd(c *cli.Context) error {
 			ParallelFunc: f,
 		})
 	}
+	// Run the parallel funcs
+	deleteErrors, errCount := shared.ParallelExecuteWorkerPool(maxWorkers, deleteFuncs)
+	return printParallelOutput(deleteErrors, errCount)
+}
+
+func pruneContainersCmd(c *cli.Context) error {
+	runtime, err := adapter.GetRuntime(c)
+	if err != nil {
+		return errors.Wrapf(err, "could not get runtime")
+	}
+	defer runtime.Shutdown(false)
+
 	maxWorkers := shared.Parallelize("rm")
 	if c.GlobalIsSet("max-workers") {
 		maxWorkers = c.GlobalInt("max-workers")
 	}
 	logrus.Debugf("Setting maximum workers to %d", maxWorkers)
 
-	// Run the parallel funcs
-	deleteErrors, errCount := shared.ParallelExecuteWorkerPool(maxWorkers, deleteFuncs)
-	return printParallelOutput(deleteErrors, errCount)
+	return pruneContainers(runtime, getContext(), maxWorkers, c.Bool("force"))
 }

cmd/podman/generate.go

@@ -9,10 +9,10 @@ var (
 		containerKubeCommand,
 	}
 
-	generateDescription = "generate structured data based for a containers and pods"
+	generateDescription = "Generate structured data based for a containers and pods"
 	kubeCommand         = cli.Command{
 		Name:                   "generate",
-		Usage:                  "generated structured data",
+		Usage:                  "Generate structured data",
 		Description:            generateDescription,
 		ArgsUsage:              "",
 		Subcommands:            generateSubCommands,

cmd/podman/generate_kube.go

@@ -17,7 +17,7 @@ var (
 	containerKubeFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "service, s",
-			Usage: "generate YAML for kubernetes service object",
+			Usage: "Generate YAML for kubernetes service object",
 		},
 	}
 	containerKubeDescription = "Generate Kubernetes Pod YAML"

cmd/podman/images.go

@@ -90,11 +90,11 @@ var (
 		},
 		cli.BoolFlag{
 			Name:  "digests",
-			Usage: "show digests",
+			Usage: "Show digests",
 		},
 		cli.StringSliceFlag{
 			Name:  "filter, f",
-			Usage: "filter output based on conditions provided (default [])",
+			Usage: "Filter output based on conditions provided (default [])",
 		},
 		cli.StringFlag{
 			Name:  "format",
@@ -102,20 +102,20 @@ var (
 		},
 		cli.BoolFlag{
 			Name:  "noheading, n",
-			Usage: "do not print column headings",
+			Usage: "Do not print column headings",
 		},
 		cli.BoolFlag{
 			Name:  "no-trunc, notruncate",
-			Usage: "do not truncate output",
+			Usage: "Do not truncate output",
 		},
 		cli.BoolFlag{
 			Name:  "quiet, q",
-			Usage: "display only image IDs",
+			Usage: "Display only image IDs",
 		},
 		cli.StringFlag{
 			Name:  "sort",
 			Usage: "Sort by created, id, repository, size, or tag",
-			Value: "created",
+			Value: "Created",
 		},
 	}
 
@@ -133,7 +133,7 @@ var (
 	lsImagesCommand = cli.Command{
 		Name:                   "list",
 		Aliases:                []string{"ls"},
-		Usage:                  "list images in local storage",
+		Usage:                  "List images in local storage",
 		Description:            imagesDescription,
 		Flags:                  imagesFlags,
 		Action:                 imagesCmd,

cmd/podman/images_prune.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+
 	"github.com/containers/libpod/libpod/adapter"
 	"github.com/pkg/errors"
 	"github.com/urfave/cli"
@@ -16,7 +17,7 @@ var (
 	pruneImageFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "remove all unused images, not just dangling ones",
+			Usage: "Remove all unused images, not just dangling ones",
 		},
 	}
 	pruneImagesCommand = cli.Command{

cmd/podman/info.go

@@ -26,7 +26,7 @@ var (
 	infoFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "debug, D",
-			Usage: "display additional debug information",
+			Usage: "Display additional debug information",
 		},
 		cli.StringFlag{
 			Name:  "format, f",

cmd/podman/main.go

@@ -97,6 +97,7 @@ func main() {
 		inspectCommand,
 		pullCommand,
 		rmiCommand,
+		systemCommand,
 		tagCommand,
 		versionCommand,
 	}
@@ -187,21 +188,21 @@ func main() {
 	app.Flags = []cli.Flag{
 		cli.StringFlag{
 			Name:   "config, c",
-			Usage:  "path of a libpod config file detailing container server configuration options",
+			Usage:  "Path of a libpod config file detailing container server configuration options",
 			Hidden: true,
 		},
 		cli.StringFlag{
 			Name:  "cpu-profile",
-			Usage: "path for the cpu profiling results",
+			Usage: "Path for the cpu profiling results",
 		},
 		cli.StringFlag{
 			Name:  "log-level",
-			Usage: "log messages above specified level: debug, info, warn, error (default), fatal or panic",
+			Usage: "Log messages above specified level: debug, info, warn, error (default), fatal or panic",
 			Value: "error",
 		},
 		cli.StringFlag{
 			Name:  "tmpdir",
-			Usage: "path to the tmp directory",
+			Usage: "Path to the tmp directory",
 		},
 	}
 

cmd/podman/mount.go

@@ -33,7 +33,7 @@ var (
 		},
 		cli.BoolFlag{
 			Name:  "notruncate",
-			Usage: "do not truncate output",
+			Usage: "Do not truncate output",
 		},
 		LatestFlag,
 	}

cmd/podman/pause.go

@@ -15,7 +15,7 @@ var (
 	pauseFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "pause all running containers",
+			Usage: "Pause all running containers",
 		},
 	}
 	pauseDescription = `

cmd/podman/play.go

@@ -12,7 +12,7 @@ var (
 	playDescription = "Play a pod and its containers from a structured file."
 	playCommand     = cli.Command{
 		Name:                   "play",
-		Usage:                  "play a container or pod",
+		Usage:                  "Play a container or pod",
 		Description:            playDescription,
 		ArgsUsage:              "",
 		Subcommands:            playSubCommands,

cmd/podman/play_kube.go

@@ -32,11 +32,11 @@ var (
 		},
 		cli.StringFlag{
 			Name:  "cert-dir",
-			Usage: "`pathname` of a directory containing TLS certificates and keys",
+			Usage: "`Pathname` of a directory containing TLS certificates and keys",
 		},
 		cli.StringFlag{
 			Name:  "creds",
-			Usage: "`credentials` (USERNAME:PASSWORD) to use for authenticating to a registry",
+			Usage: "`Credentials` (USERNAME:PASSWORD) to use for authenticating to a registry",
 		},
 		cli.BoolFlag{
 			Name:  "quiet, q",
@@ -44,11 +44,11 @@ var (
 		},
 		cli.StringFlag{
 			Name:  "signature-policy",
-			Usage: "`pathname` of signature policy file (not usually used)",
+			Usage: "`Pathname` of signature policy file (not usually used)",
 		},
 		cli.BoolTFlag{
 			Name:  "tls-verify",
-			Usage: "require HTTPS and verify certificates when contacting registries (default: true)",
+			Usage: "Require HTTPS and verify certificates when contacting registries (default: true)",
 		},
 	}
 	playKubeDescription = "Play a Pod and its containers based on a Kubrernetes YAML"
@@ -58,7 +58,7 @@ var (
 		Description:            playKubeDescription,
 		Action:                 playKubeYAMLCmd,
 		Flags:                  sortFlags(playKubeFlags),
-		ArgsUsage:              "kubernetes YAML file",
+		ArgsUsage:              "Kubernetes YAML file",
 		UseShortOptionHandling: true,
 		OnUsageError:           usageErrorHandler,
 	}

cmd/podman/pod_inspect.go

@@ -14,10 +14,10 @@ var (
 	podInspectFlags = []cli.Flag{
 		LatestPodFlag,
 	}
-	podInspectDescription = "display the configuration for a pod by name or id"
+	podInspectDescription = "Display the configuration for a pod by name or id"
 	podInspectCommand     = cli.Command{
 		Name:                   "inspect",
-		Usage:                  "displays a pod configuration",
+		Usage:                  "Displays a pod configuration",
 		Description:            podInspectDescription,
 		Flags:                  sortFlags(podInspectFlags),
 		Action:                 podInspectCmd,

cmd/podman/pod_pause.go

@@ -13,7 +13,7 @@ var (
 	podPauseFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "pause all running pods",
+			Usage: "Pause all running pods",
 		},
 		LatestPodFlag,
 	}

cmd/podman/pod_restart.go

@@ -13,7 +13,7 @@ var (
 	podRestartFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "restart all pods",
+			Usage: "Restart all pods",
 		},
 		LatestPodFlag,
 	}

cmd/podman/pod_start.go

@@ -13,7 +13,7 @@ var (
 	podStartFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "start all running pods",
+			Usage: "Start all running pods",
 		},
 		LatestPodFlag,
 	}

cmd/podman/pod_stats.go

@@ -19,22 +19,22 @@ var (
 	podStatsFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "show stats for all pods.  Only running pods are shown by default.",
+			Usage: "Show stats for all pods.  Only running pods are shown by default.",
 		},
 		cli.BoolFlag{
 			Name:  "no-stream",
-			Usage: "disable streaming stats and only pull the first result, default setting is false",
+			Usage: "Disable streaming stats and only pull the first result, default setting is false",
 		},
 		cli.BoolFlag{
 			Name:  "no-reset",
-			Usage: "disable resetting the screen between intervals",
+			Usage: "Disable resetting the screen between intervals",
 		},
 		cli.StringFlag{
 			Name:  "format",
-			Usage: "pretty-print container statistics to JSON or using a Go template",
+			Usage: "Pretty-print container statistics to JSON or using a Go template",
 		}, LatestPodFlag,
 	}
-	podStatsDescription = "display a live stream of resource usage statistics for the containers in or more pods"
+	podStatsDescription = "Display a live stream of resource usage statistics for the containers in or more pods"
 	podStatsCommand     = cli.Command{
 		Name:                   "stats",
 		Usage:                  "Display percentage of CPU, memory, network I/O, block I/O and PIDs for containers in one or more pods",

cmd/podman/pod_stop.go

@@ -12,7 +12,7 @@ var (
 	podStopFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "stop all running pods",
+			Usage: "Stop all running pods",
 		},
 		LatestPodFlag,
 		cli.UintFlag{

cmd/podman/pod_unpause.go

@@ -13,7 +13,7 @@ var (
 	podUnpauseFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "unpause all paused pods",
+			Usage: "Unpause all paused pods",
 		},
 		LatestPodFlag,
 	}

cmd/podman/port.go

@@ -15,7 +15,7 @@ var (
 	portFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "display port information for all containers",
+			Usage: "Display port information for all containers",
 		},
 		LatestFlag,
 	}

cmd/podman/pull.go

@@ -41,7 +41,7 @@ var (
 		},
 		cli.BoolTFlag{
 			Name:  "tls-verify",
-			Usage: "require HTTPS and verify certificates when contacting registries (default: true)",
+			Usage: "Require HTTPS and verify certificates when contacting registries (default: true)",
 		},
 	}
 

cmd/podman/push.go

@@ -21,40 +21,40 @@ var (
 	pushFlags = []cli.Flag{
 		cli.StringFlag{
 			Name:   "signature-policy",
-			Usage:  "`pathname` of signature policy file (not usually used)",
+			Usage:  "`Pathname` of signature policy file (not usually used)",
 			Hidden: true,
 		},
 		cli.StringFlag{
 			Name:  "creds",
-			Usage: "`credentials` (USERNAME:PASSWORD) to use for authenticating to a registry",
+			Usage: "`Credentials` (USERNAME:PASSWORD) to use for authenticating to a registry",
 		},
 		cli.StringFlag{
 			Name:  "cert-dir",
-			Usage: "`pathname` of a directory containing TLS certificates and keys",
+			Usage: "`Pathname` of a directory containing TLS certificates and keys",
 		},
 		cli.BoolFlag{
 			Name:  "compress",
-			Usage: "compress tarball image layers when pushing to a directory using the 'dir' transport. (default is same compression type as source)",
+			Usage: "Compress tarball image layers when pushing to a directory using the 'dir' transport. (default is same compression type as source)",
 		},
 		cli.StringFlag{
 			Name:  "format, f",
-			Usage: "manifest type (oci, v2s1, or v2s2) to use when pushing an image using the 'dir:' transport (default is manifest type of source)",
+			Usage: "Manifest type (oci, v2s1, or v2s2) to use when pushing an image using the 'dir:' transport (default is manifest type of source)",
 		},
 		cli.BoolTFlag{
 			Name:  "tls-verify",
-			Usage: "require HTTPS and verify certificates when contacting registries (default: true)",
+			Usage: "Require HTTPS and verify certificates when contacting registries (default: true)",
 		},
 		cli.BoolFlag{
 			Name:  "remove-signatures",
-			Usage: "discard any pre-existing signatures in the image",
+			Usage: "Discard any pre-existing signatures in the image",
 		},
 		cli.StringFlag{
 			Name:  "sign-by",
-			Usage: "add a signature at the destination using the specified key",
+			Usage: "Add a signature at the destination using the specified key",
 		},
 		cli.BoolFlag{
 			Name:  "quiet, q",
-			Usage: "don't output progress information when pushing images",
+			Usage: "Don't output progress information when pushing images",
 		},
 		cli.StringFlag{
 			Name:  "authfile",

cmd/podman/restart.go

@@ -17,11 +17,11 @@ var (
 	restartFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "restart all non-running containers",
+			Usage: "Restart all non-running containers",
 		},
 		cli.BoolFlag{
 			Name:  "running",
-			Usage: "restart only running containers when --all is used",
+			Usage: "Restart only running containers when --all is used",
 		},
 		cli.UintFlag{
 			Name:  "timeout, time, t",

cmd/podman/restore.go

@@ -21,18 +21,18 @@ var (
 	restoreFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "keep, k",
-			Usage: "keep all temporary checkpoint files",
+			Usage: "Keep all temporary checkpoint files",
 		},
 		// restore --all would make more sense if there would be
 		// dedicated state for container which are checkpointed.
 		// TODO: add ContainerStateCheckpointed
 		cli.BoolFlag{
 			Name:  "tcp-established",
-			Usage: "checkpoint a container with established TCP connections",
+			Usage: "Checkpoint a container with established TCP connections",
 		},
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "restore all checkpointed containers",
+			Usage: "Restore all checkpointed containers",
 		},
 		LatestFlag,
 	}

cmd/podman/rmi.go

@@ -15,11 +15,11 @@ var (
 	rmiFlags       = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "remove all images",
+			Usage: "Remove all images",
 		},
 		cli.BoolFlag{
 			Name:  "force, f",
-			Usage: "force removal of the image",
+			Usage: "Force removal of the image",
 		},
 	}
 	rmiCommand = cli.Command{
@@ -34,7 +34,7 @@ var (
 	}
 	rmImageCommand = cli.Command{
 		Name:                   "rm",
-		Usage:                  "removes one or more images from local storage",
+		Usage:                  "Removes one or more images from local storage",
 		Description:            rmiDescription,
 		Action:                 rmiCmd,
 		ArgsUsage:              "IMAGE-NAME-OR-ID [...]",

cmd/podman/run.go

@@ -20,7 +20,7 @@ var runDescription = "Runs a command in a new container from the given image"
 
 var runFlags []cli.Flag = append(createFlags, cli.BoolTFlag{
 	Name:  "sig-proxy",
-	Usage: "proxy received signals to the process (default true)",
+	Usage: "Proxy received signals to the process (default true)",
 })
 
 var runCommand = cli.Command{
@@ -131,6 +131,7 @@ func runCmd(c *cli.Context) error {
 			ctrExitCode, err := readExitFile(runtime.GetConfig().TmpDir, ctr.ID())
 			if err != nil {
 				logrus.Errorf("Cannot get exit code: %v", err)
+				exitCode = 127
 			} else {
 				exitCode = ctrExitCode
 			}

cmd/podman/runlabel.go

@@ -24,15 +24,15 @@ var (
 		},
 		cli.BoolFlag{
 			Name:  "display",
-			Usage: "preview the command that the label would run",
+			Usage: "Preview the command that the label would run",
 		},
 		cli.StringFlag{
 			Name:  "cert-dir",
-			Usage: "`pathname` of a directory containing TLS certificates and keys",
+			Usage: "`Pathname` of a directory containing TLS certificates and keys",
 		},
 		cli.StringFlag{
 			Name:  "creds",
-			Usage: "`credentials` (USERNAME:PASSWORD) to use for authenticating to a registry",
+			Usage: "`Credentials` (USERNAME:PASSWORD) to use for authenticating to a registry",
 		},
 		cli.StringFlag{
 			Name:  "name",
@@ -59,15 +59,15 @@ var (
 		},
 		cli.BoolFlag{
 			Name:  "pull, p",
-			Usage: "pull the image if it does not exist locally prior to executing the label contents",
+			Usage: "Pull the image if it does not exist locally prior to executing the label contents",
 		},
 		cli.StringFlag{
 			Name:  "signature-policy",
-			Usage: "`pathname` of signature policy file (not usually used)",
+			Usage: "`Pathname` of signature policy file (not usually used)",
 		},
 		cli.BoolTFlag{
 			Name:  "tls-verify",
-			Usage: "require HTTPS and verify certificates when contacting registries (default: true)",
+			Usage: "Require HTTPS and verify certificates when contacting registries (default: true)",
 		},
 	}
 

cmd/podman/save.go

@@ -29,7 +29,7 @@ var (
 	saveFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "compress",
-			Usage: "compress tarball image layers when saving to a directory using the 'dir' transport. (default is same compression type as source)",
+			Usage: "Compress tarball image layers when saving to a directory using the 'dir' transport. (default is same compression type as source)",
 		},
 		cli.StringFlag{
 			Name:  "output, o",

cmd/podman/search.go

@@ -30,23 +30,23 @@ var (
 		},
 		cli.StringSliceFlag{
 			Name:  "filter, f",
-			Usage: "filter output based on conditions provided (default [])",
+			Usage: "Filter output based on conditions provided (default [])",
 		},
 		cli.StringFlag{
 			Name:  "format",
-			Usage: "change the output format to a Go template",
+			Usage: "Change the output format to a Go template",
 		},
 		cli.IntFlag{
 			Name:  "limit",
-			Usage: "limit the number of results",
+			Usage: "Limit the number of results",
 		},
 		cli.BoolFlag{
 			Name:  "no-trunc",
-			Usage: "do not truncate the output",
+			Usage: "Do not truncate the output",
 		},
 		cli.BoolTFlag{
 			Name:  "tls-verify",
-			Usage: "require HTTPS and verify certificates when contacting registries (default: true)",
+			Usage: "Require HTTPS and verify certificates when contacting registries (default: true)",
 		},
 	}
 	searchDescription = `

cmd/podman/start.go

@@ -29,7 +29,7 @@ var (
 		},
 		cli.BoolTFlag{
 			Name:  "sig-proxy",
-			Usage: "proxy received signals to the process (default true if attaching, false otherwise)",
+			Usage: "Proxy received signals to the process (default true if attaching, false otherwise)",
 		},
 		LatestFlag,
 	}

cmd/podman/stats.go

@@ -31,23 +31,23 @@ var (
 	statsFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "show all containers. Only running containers are shown by default. The default is false",
+			Usage: "Show all containers. Only running containers are shown by default. The default is false",
 		},
 		cli.BoolFlag{
 			Name:  "no-stream",
-			Usage: "disable streaming stats and only pull the first result, default setting is false",
+			Usage: "Disable streaming stats and only pull the first result, default setting is false",
 		},
 		cli.StringFlag{
 			Name:  "format",
-			Usage: "pretty-print container statistics to JSON or using a Go template",
+			Usage: "Pretty-print container statistics to JSON or using a Go template",
 		},
 		cli.BoolFlag{
 			Name:  "no-reset",
-			Usage: "disable resetting the screen between intervals",
+			Usage: "Disable resetting the screen between intervals",
 		}, LatestFlag,
 	}
 
-	statsDescription = "display a live stream of one or more containers' resource usage statistics"
+	statsDescription = "Display a live stream of one or more containers' resource usage statistics"
 	statsCommand     = cli.Command{
 		Name:         "stats",
 		Usage:        "Display percentage of CPU, memory, network I/O, block I/O and PIDs for one or more containers",

cmd/podman/stop.go

@@ -21,7 +21,7 @@ var (
 		},
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "stop all running containers",
+			Usage: "Stop all running containers",
 		}, LatestFlag,
 	}
 	stopDescription = `

cmd/podman/system.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"sort"
+
+	"github.com/urfave/cli"
+)
+
+var (
+	systemSubCommands = []cli.Command{
+		pruneSystemCommand,
+	}
+	systemDescription = "Manage podman"
+	systemCommand     = cli.Command{
+		Name:                   "system",
+		Usage:                  "Manage podman",
+		Description:            systemDescription,
+		ArgsUsage:              "",
+		Subcommands:            getSystemSubCommandsSorted(),
+		UseShortOptionHandling: true,
+		OnUsageError:           usageErrorHandler,
+	}
+)
+
+func getSystemSubCommandsSorted() []cli.Command {
+	systemSubCommands = append(systemSubCommands, getSystemSubCommands()...)
+	sort.Sort(commandSortedAlpha{systemSubCommands})
+	return systemSubCommands
+}

cmd/podman/system_prune.go

@@ -0,0 +1,107 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/containers/libpod/cmd/podman/shared"
+	"github.com/containers/libpod/libpod/adapter"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli"
+)
+
+var (
+	pruneSystemDescription = `
+	podman system prune
+
+        Remove unused data
+`
+	pruneSystemFlags = []cli.Flag{
+		cli.BoolFlag{
+			Name:  "all, a",
+			Usage: "Remove all unused data",
+		},
+		cli.BoolFlag{
+			Name:  "force, f",
+			Usage: "Do not prompt for confirmation",
+		},
+		cli.BoolFlag{
+			Name:  "volumes",
+			Usage: "Prune volumes",
+		},
+	}
+	pruneSystemCommand = cli.Command{
+		Name:         "prune",
+		Usage:        "Remove unused data",
+		Description:  pruneSystemDescription,
+		Action:       pruneSystemCmd,
+		OnUsageError: usageErrorHandler,
+		Flags:        pruneSystemFlags,
+	}
+)
+
+func pruneSystemCmd(c *cli.Context) error {
+
+	// Prompt for confirmation if --force is not set
+	if !c.Bool("force") {
+		reader := bufio.NewReader(os.Stdin)
+		volumeString := ""
+		if c.Bool("volumes") {
+			volumeString = `
+        - all volumes not used by at least one container`
+		}
+		fmt.Printf(`
+WARNING! This will remove:
+        - all stopped containers%s
+        - all dangling images
+        - all build cache
+Are you sure you want to continue? [y/N] `, volumeString)
+		ans, err := reader.ReadString('\n')
+		if err != nil {
+			return errors.Wrapf(err, "error reading input")
+		}
+		if strings.ToLower(ans)[0] != 'y' {
+			return nil
+		}
+	}
+
+	runtime, err := adapter.GetRuntime(c)
+	if err != nil {
+		return errors.Wrapf(err, "could not get runtime")
+	}
+	defer runtime.Shutdown(false)
+
+	ctx := getContext()
+	fmt.Println("Deleted Containers")
+	lasterr := pruneContainers(runtime, ctx, shared.Parallelize("rm"), false)
+	if c.Bool("volumes") {
+		fmt.Println("Deleted Volumes")
+		err := volumePrune(runtime, getContext())
+		if err != nil {
+			if lasterr != nil {
+				logrus.Errorf("%q", lasterr)
+			}
+			lasterr = err
+		}
+	}
+
+	// Call prune; if any cids are returned, print them and then
+	// return err in case an error also came up
+	pruneCids, err := runtime.PruneImages(c.Bool("all"))
+	if len(pruneCids) > 0 {
+		fmt.Println("Deleted Images")
+		for _, cid := range pruneCids {
+			fmt.Println(cid)
+		}
+	}
+	if err != nil {
+		if lasterr != nil {
+			logrus.Errorf("%q", lasterr)
+		}
+		lasterr = err
+	}
+	return lasterr
+}

cmd/podman/umount.go

@@ -15,11 +15,11 @@ var (
 	umountFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "umount all of the currently mounted containers",
+			Usage: "Umount all of the currently mounted containers",
 		},
 		cli.BoolFlag{
 			Name:  "force, f",
-			Usage: "force the complete umount all of the currently mounted containers",
+			Usage: "Force the complete umount all of the currently mounted containers",
 		},
 		LatestFlag,
 	}

cmd/podman/unpause.go

@@ -15,7 +15,7 @@ var (
 	unpauseFlags = []cli.Flag{
 		cli.BoolFlag{
 			Name:  "all, a",
-			Usage: "unpause all paused containers",
+			Usage: "Unpause all paused containers",
 		},
 	}
 	unpauseDescription = `

cmd/podman/varlink.go

@@ -24,7 +24,7 @@ var (
 	varlinkFlags = []cli.Flag{
 		cli.IntFlag{
 			Name:  "timeout, t",
-			Usage: "time until the varlink session expires in milliseconds.  Use 0 to disable the timeout.",
+			Usage: "Time until the varlink session expires in milliseconds.  Use 0 to disable the timeout.",
 			Value: 1000,
 		},
 	}

cmd/podman/volume_prune.go

@@ -2,12 +2,13 @@ package main
 
 import (
 	"bufio"
+	"context"
 	"fmt"
 	"os"
 	"strings"
 
-	"github.com/containers/libpod/cmd/podman/libpodruntime"
 	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/libpod/adapter"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
@@ -37,35 +38,9 @@ var volumePruneCommand = cli.Command{
 	UseShortOptionHandling: true,
 }
 
-func volumePruneCmd(c *cli.Context) error {
+func volumePrune(runtime *adapter.LocalRuntime, ctx context.Context) error {
 	var lastError error
 
-	if err := validateFlags(c, volumePruneFlags); err != nil {
-		return err
-	}
-
-	runtime, err := libpodruntime.GetRuntime(c)
-	if err != nil {
-		return errors.Wrapf(err, "error creating libpod runtime")
-	}
-	defer runtime.Shutdown(false)
-
-	ctx := getContext()
-
-	// Prompt for confirmation if --force is not set
-	if !c.Bool("force") {
-		reader := bufio.NewReader(os.Stdin)
-		fmt.Println("WARNING! This will remove all volumes not used by at least one container.")
-		fmt.Print("Are you sure you want to continue? [y/N] ")
-		ans, err := reader.ReadString('\n')
-		if err != nil {
-			return errors.Wrapf(err, "error reading input")
-		}
-		if strings.ToLower(ans)[0] != 'y' {
-			return nil
-		}
-	}
-
 	volumes, err := runtime.GetAllVolumes()
 	if err != nil {
 		return err
@@ -84,3 +59,32 @@ func volumePruneCmd(c *cli.Context) error {
 	}
 	return lastError
 }
+
+func volumePruneCmd(c *cli.Context) error {
+
+	if err := validateFlags(c, volumePruneFlags); err != nil {
+		return err
+	}
+
+	runtime, err := adapter.GetRuntime(c)
+	if err != nil {
+		return errors.Wrapf(err, "error creating libpod runtime")
+	}
+	defer runtime.Shutdown(false)
+
+	// Prompt for confirmation if --force is not set
+	if !c.Bool("force") {
+		reader := bufio.NewReader(os.Stdin)
+		fmt.Println("WARNING! This will remove all volumes not used by at least one container.")
+		fmt.Print("Are you sure you want to continue? [y/N] ")
+		ans, err := reader.ReadString('\n')
+		if err != nil {
+			return errors.Wrapf(err, "error reading input")
+		}
+		if strings.ToLower(ans)[0] != 'y' {
+			return nil
+		}
+	}
+
+	return volumePrune(runtime, getContext())
+}