golangci-lint pass number 2

clean up and prepare to migrate to the golangci-linter

Signed-off-by: baude <bbaude@redhat.com>

30 files changed, 138 insertions, 130 deletions

diff --git a/cmd/podman/pod_ps.go b/cmd/podman/pod_ps.go
index a525857de..fd8da53fb 100644
--- a/cmd/podman/pod_ps.go
+++ b/cmd/podman/pod_ps.go
@@ -552,9 +552,6 @@ func generatePodPsOutput(pods []*adapter.Pod, opts podPsOptions) error {
 
 	switch opts.Format {
 	case formats.JSONString:
-		if err != nil {
-			return errors.Wrapf(err, "unable to create JSON for output")
-		}
 		out = formats.JSONStructArray{Output: podPsToGeneric([]podPsTemplateParams{}, psOutput)}
 	default:
 		psOutput, err := getPodTemplateOutput(psOutput, opts)
diff --git a/cmd/podman/ps.go b/cmd/podman/ps.go
index 26cc55e5f..9fad0ea65 100644
--- a/cmd/podman/ps.go
+++ b/cmd/podman/ps.go
@@ -319,6 +319,9 @@ func psDisplay(c *cliconfig.PsValues, runtime *adapter.LocalRuntime) error {
 	}
 
 	pss, err := runtime.Ps(c, opts)
+	if err != nil {
+		return err
+	}
 	// Here and down
 	if opts.Sort != "" {
 		pss, err = sortPsOutput(opts.Sort, pss)
@@ -376,8 +379,8 @@ func psDisplay(c *cliconfig.PsValues, runtime *adapter.LocalRuntime) error {
 					size = units.HumanSizeWithPrecision(0, 0)
 				} else {
 					size = units.HumanSizeWithPrecision(float64(container.Size.RwSize), 3) + " (virtual " + units.HumanSizeWithPrecision(float64(container.Size.RootFsSize), 3) + ")"
-					fmt.Fprintf(w, "\t%s", size)
 				}
+				fmt.Fprintf(w, "\t%s", size)
 			}
 
 		} else {
diff --git a/cmd/podman/shared/container.go b/cmd/podman/shared/container.go
index df4583be6..3c68a29b4 100644
--- a/cmd/podman/shared/container.go
+++ b/cmd/podman/shared/container.go
@@ -305,7 +305,7 @@ func generateContainerFilterFuncs(filter, filterValue string, r *libpod.Runtime)
 		}
 		return func(c *libpod.Container) bool {
 			ec, exited, err := c.ExitCode()
-			if ec == int32(exitCode) && err == nil && exited == true {
+			if ec == int32(exitCode) && err == nil && exited {
 				return true
 			}
 			return false
@@ -611,7 +611,7 @@ func getNamespaceInfo(path string) (string, error) {
 
 // getStrFromSquareBrackets gets the string inside [] from a string
 func getStrFromSquareBrackets(cmd string) string {
-	reg, err := regexp.Compile(".*\\[|\\].*")
+	reg, err := regexp.Compile(`.*\[|\].*`)
 	if err != nil {
 		return ""
 	}
diff --git a/cmd/podman/shared/create.go b/cmd/podman/shared/create.go
index f401d3cf5..60a01ff6d 100644
--- a/cmd/podman/shared/create.go
+++ b/cmd/podman/shared/create.go
@@ -93,9 +93,8 @@ func CreateContainer(ctx context.Context, c *GenericCLIResults, runtime *libpod.
 			imageName = newImage.ID()
 		}
 
-		var healthCheckCommandInput string
 		// if the user disabled the healthcheck with "none", we skip adding it
-		healthCheckCommandInput = c.String("healthcheck-command")
+		healthCheckCommandInput := c.String("healthcheck-command")
 
 		// the user didnt disable the healthcheck but did pass in a healthcheck command
 		// now we need to make a healthcheck from the commandline input
diff --git a/cmd/podman/shared/create_cli.go b/cmd/podman/shared/create_cli.go
index 4bfef8b62..08a40b206 100644
--- a/cmd/podman/shared/create_cli.go
+++ b/cmd/podman/shared/create_cli.go
@@ -133,7 +133,7 @@ func verifyContainerResources(config *cc.CreateConfig, update bool) ([]string, e
 	if config.Resources.KernelMemory > 0 && config.Resources.KernelMemory < linuxMinMemory {
 		return warnings, fmt.Errorf("minimum kernel memory limit allowed is 4MB")
 	}
-	if config.Resources.DisableOomKiller == true && !sysInfo.OomKillDisable {
+	if config.Resources.DisableOomKiller && !sysInfo.OomKillDisable {
 		// only produce warnings if the setting wasn't to *disable* the OOM Kill; no point
 		// warning the caller if they already wanted the feature to be off
 		warnings = addWarning(warnings, "Your kernel does not support OomKillDisable. OomKillDisable discarded.")
diff --git a/cmd/podman/stats.go b/cmd/podman/stats.go
index a1ec20b37..05e30f95f 100644
--- a/cmd/podman/stats.go
+++ b/cmd/podman/stats.go
@@ -101,9 +101,8 @@ func statsCmd(c *cliconfig.StatsValues) error {
 	}
 
 	var ctrs []*libpod.Container
-	var containerFunc func() ([]*libpod.Container, error)
 
-	containerFunc = runtime.GetRunningContainers
+	containerFunc := runtime.GetRunningContainers
 	if len(c.InputArgs) > 0 {
 		containerFunc = func() ([]*libpod.Container, error) { return runtime.GetContainersByList(c.InputArgs) }
 	} else if latest {
diff --git a/cmd/podman/tree.go b/cmd/podman/tree.go
index c13dffd6e..904a0d375 100644
--- a/cmd/podman/tree.go
+++ b/cmd/podman/tree.go
@@ -107,7 +107,7 @@ func printImageChildren(layerMap map[string]*image.LayerInfo, layerID string, pr
 	if !ok {
 		return fmt.Errorf("lookup error: layerid  %s, not found", layerID)
 	}
-	fmt.Printf(prefix)
+	fmt.Print(prefix)
 
 	//initialize intend with middleItem to reduce middleItem checks.
 	intend := middleItem
diff --git a/libpod/container.go b/libpod/container.go
index a9b512de9..b71c0b2be 100644
--- a/libpod/container.go
+++ b/libpod/container.go
@@ -639,10 +639,7 @@ func (c *Container) HostsAdd() []string {
 // trigger some OCI hooks.
 func (c *Container) UserVolumes() []string {
 	volumes := make([]string, 0, len(c.config.UserVolumes))
-	for _, vol := range c.config.UserVolumes {
-		volumes = append(volumes, vol)
-	}
-
+	volumes = append(volumes, c.config.UserVolumes...)
 	return volumes
 }
 
@@ -650,10 +647,7 @@ func (c *Container) UserVolumes() []string {
 // This is not added to the spec, but is instead used during image commit.
 func (c *Container) Entrypoint() []string {
 	entrypoint := make([]string, 0, len(c.config.Entrypoint))
-	for _, str := range c.config.Entrypoint {
-		entrypoint = append(entrypoint, str)
-	}
-
+	entrypoint = append(entrypoint, c.config.Entrypoint...)
 	return entrypoint
 }
 
@@ -661,10 +655,7 @@ func (c *Container) Entrypoint() []string {
 // This is not added to the spec, but is instead used during image commit
 func (c *Container) Command() []string {
 	command := make([]string, 0, len(c.config.Command))
-	for _, str := range c.config.Command {
-		command = append(command, str)
-	}
-
+	command = append(command, c.config.Command...)
 	return command
 }
 
diff --git a/libpod/container_api.go b/libpod/container_api.go
index 3dd84b02c..3577b8e8c 100644
--- a/libpod/container_api.go
+++ b/libpod/container_api.go
@@ -277,7 +277,7 @@ func (c *Container) Exec(tty, privileged bool, env, cmd []string, user, workDir
 				break
 			}
 		}
-		if found == true {
+		if found {
 			sessionID = stringid.GenerateNonCryptoID()
 		}
 	}
diff --git a/libpod/container_graph.go b/libpod/container_graph.go
index 50dbdfbe4..5aa51bc2f 100644
--- a/libpod/container_graph.go
+++ b/libpod/container_graph.go
@@ -264,6 +264,4 @@ func startNode(ctx context.Context, node *containerNode, setError bool, ctrError
 	for _, successor := range node.dependedOn {
 		startNode(ctx, successor, ctrErrored, ctrErrors, ctrsVisited, restart)
 	}
-
-	return
 }
diff --git a/libpod/container_inspect.go b/libpod/container_inspect.go
index 2de78254c..de0027414 100644
--- a/libpod/container_inspect.go
+++ b/libpod/container_inspect.go
@@ -454,9 +454,7 @@ func (c *Container) generateInspectContainerConfig(spec *spec.Spec) (*InspectCon
 	if spec.Process != nil {
 		ctrConfig.Tty = spec.Process.Terminal
 		ctrConfig.Env = []string{}
-		for _, val := range spec.Process.Env {
-			ctrConfig.Env = append(ctrConfig.Env, val)
-		}
+		ctrConfig.Env = append(ctrConfig.Env, spec.Process.Env...)
 		ctrConfig.WorkingDir = spec.Process.Cwd
 	}
 
@@ -466,9 +464,7 @@ func (c *Container) generateInspectContainerConfig(spec *spec.Spec) (*InspectCon
 	// Leave empty is not explicitly overwritten by user
 	if len(c.config.Command) != 0 {
 		ctrConfig.Cmd = []string{}
-		for _, val := range c.config.Command {
-			ctrConfig.Cmd = append(ctrConfig.Cmd, val)
-		}
+		ctrConfig.Cmd = append(ctrConfig.Cmd, c.config.Command...)
 	}
 
 	// Leave empty if not explicitly overwritten by user
diff --git a/libpod/container_internal.go b/libpod/container_internal.go
index c409da96a..47b425c0a 100644
--- a/libpod/container_internal.go
+++ b/libpod/container_internal.go
@@ -815,34 +815,6 @@ func (c *Container) checkDependenciesRunning() ([]string, error) {
 	return notRunning, nil
 }
 
-// Check if a container's dependencies are running
-// Returns a []string containing the IDs of dependencies that are not running
-// Assumes depencies are already locked, and will be passed in
-// Accepts a map[string]*Container containing, at a minimum, the locked
-// dependency containers
-// (This must be a map from container ID to container)
-func (c *Container) checkDependenciesRunningLocked(depCtrs map[string]*Container) ([]string, error) {
-	deps := c.Dependencies()
-	notRunning := []string{}
-
-	for _, dep := range deps {
-		depCtr, ok := depCtrs[dep]
-		if !ok {
-			return nil, errors.Wrapf(define.ErrNoSuchCtr, "container %s depends on container %s but it is not on containers passed to checkDependenciesRunning", c.ID(), dep)
-		}
-
-		if err := c.syncContainer(); err != nil {
-			return nil, err
-		}
-
-		if depCtr.state.State != define.ContainerStateRunning {
-			notRunning = append(notRunning, dep)
-		}
-	}
-
-	return notRunning, nil
-}
-
 func (c *Container) completeNetworkSetup() error {
 	netDisabled, err := c.NetworkDisabled()
 	if err != nil {
diff --git a/libpod/events/filters.go b/libpod/events/filters.go
index 9a64082d1..b3c5eda6e 100644
--- a/libpod/events/filters.go
+++ b/libpod/events/filters.go
@@ -1,7 +1,6 @@
 package events
 
 import (
-	"fmt"
 	"strings"
 	"time"
 
@@ -23,7 +22,7 @@ func generateEventFilter(filter, filterValue string) (func(e *Event) bool, error
 		}, nil
 	case "EVENT", "STATUS":
 		return func(e *Event) bool {
-			return fmt.Sprintf("%s", e.Status) == filterValue
+			return string(e.Status) == filterValue
 		}, nil
 	case "IMAGE":
 		return func(e *Event) bool {
@@ -54,7 +53,7 @@ func generateEventFilter(filter, filterValue string) (func(e *Event) bool, error
 		}, nil
 	case "TYPE":
 		return func(e *Event) bool {
-			return fmt.Sprintf("%s", e.Type) == filterValue
+			return string(e.Type) == filterValue
 		}, nil
 	}
 	return nil, errors.Errorf("%s is an invalid filter", filter)
diff --git a/libpod/events/nullout.go b/libpod/events/nullout.go
index 7d811a9c7..b11afcf80 100644
--- a/libpod/events/nullout.go
+++ b/libpod/events/nullout.go
@@ -17,7 +17,6 @@ func (e EventToNull) Read(options ReadOptions) error {
 // NewNullEventer returns a new null eventer.  You should only do this for
 // the purposes on internal libpod testing.
 func NewNullEventer() Eventer {
-	var e Eventer
-	e = EventToNull{}
+	e := EventToNull{}
 	return e
 }
diff --git a/libpod/healthcheck_linux.go b/libpod/healthcheck_linux.go
index 53fb271d1..dca72430d 100644
--- a/libpod/healthcheck_linux.go
+++ b/libpod/healthcheck_linux.go
@@ -62,7 +62,7 @@ func (c *Container) createTimer() error {
 	if rootless.IsRootless() {
 		cmd = append(cmd, "--user")
 	}
-	cmd = append(cmd, "--unit", fmt.Sprintf("%s", c.ID()), fmt.Sprintf("--on-unit-inactive=%s", c.HealthCheckConfig().Interval.String()), "--timer-property=AccuracySec=1s", podman, "healthcheck", "run", c.ID())
+	cmd = append(cmd, "--unit", c.ID(), fmt.Sprintf("--on-unit-inactive=%s", c.HealthCheckConfig().Interval.String()), "--timer-property=AccuracySec=1s", podman, "healthcheck", "run", c.ID())
 
 	conn, err := getConnection()
 	if err != nil {
diff --git a/libpod/image/image.go b/libpod/image/image.go
index 6509134ac..f9879b85b 100644
--- a/libpod/image/image.go
+++ b/libpod/image/image.go
@@ -461,7 +461,11 @@ func getImageDigest(ctx context.Context, src types.ImageReference, sc *types.Sys
 	if err != nil {
 		return "", err
 	}
-	defer newImg.Close()
+	defer func() {
+		if err := newImg.Close(); err != nil {
+			logrus.Errorf("failed to close image: %q", err)
+		}
+	}()
 	imageDigest := newImg.ConfigInfo().Digest
 	if err = imageDigest.Validate(); err != nil {
 		return "", errors.Wrapf(err, "error getting config info")
@@ -513,7 +517,7 @@ func (i *Image) TagImage(tag string) error {
 	if err := i.reloadImage(); err != nil {
 		return err
 	}
-	defer i.newImageEvent(events.Tag)
+	i.newImageEvent(events.Tag)
 	return nil
 }
 
@@ -538,7 +542,7 @@ func (i *Image) UntagImage(tag string) error {
 	if err := i.reloadImage(); err != nil {
 		return err
 	}
-	defer i.newImageEvent(events.Untag)
+	i.newImageEvent(events.Untag)
 	return nil
 }
 
@@ -574,7 +578,11 @@ func (i *Image) PushImageToReference(ctx context.Context, dest types.ImageRefere
 	if err != nil {
 		return err
 	}
-	defer policyContext.Destroy()
+	defer func() {
+		if err := policyContext.Destroy(); err != nil {
+			logrus.Errorf("failed to destroy policy context: %q", err)
+		}
+	}()
 
 	// Look up the source image, expecting it to be in local storage
 	src, err := is.Transport.ParseStoreReference(i.imageruntime.store, i.ID())
@@ -588,7 +596,7 @@ func (i *Image) PushImageToReference(ctx context.Context, dest types.ImageRefere
 	if err != nil {
 		return errors.Wrapf(err, "Error copying image to the remote destination")
 	}
-	defer i.newImageEvent(events.Push)
+	i.newImageEvent(events.Push)
 	return nil
 }
 
@@ -984,11 +992,15 @@ func (ir *Runtime) Import(ctx context.Context, path, reference string, writer io
 	if err != nil {
 		return nil, err
 	}
-	defer policyContext.Destroy()
+	defer func() {
+		if err := policyContext.Destroy(); err != nil {
+			logrus.Errorf("failed to destroy policy context: %q", err)
+		}
+	}()
 	copyOptions := getCopyOptions(sc, writer, nil, nil, signingOptions, "", nil)
 	dest, err := is.Transport.ParseStoreReference(ir.store, reference)
 	if err != nil {
-		errors.Wrapf(err, "error getting image reference for %q", reference)
+		return nil, errors.Wrapf(err, "error getting image reference for %q", reference)
 	}
 	_, err = cp.Image(ctx, policyContext, dest, src, copyOptions)
 	if err != nil {
@@ -996,7 +1008,7 @@ func (ir *Runtime) Import(ctx context.Context, path, reference string, writer io
 	}
 	newImage, err := ir.NewFromLocal(reference)
 	if err == nil {
-		defer newImage.newImageEvent(events.Import)
+		newImage.newImageEvent(events.Import)
 	}
 	return newImage, err
 }
@@ -1339,7 +1351,7 @@ func (i *Image) Save(ctx context.Context, source, format, output string, moreTag
 	if err := i.PushImageToReference(ctx, destRef, manifestType, "", "", writer, compress, SigningOptions{}, &DockerRegistryOptions{}, additionaltags); err != nil {
 		return errors.Wrapf(err, "unable to save %q", source)
 	}
-	defer i.newImageEvent(events.Save)
+	i.newImageEvent(events.Save)
 	return nil
 }
 
diff --git a/libpod/image/pull.go b/libpod/image/pull.go
index ce8a19fbc..581beb538 100644
--- a/libpod/image/pull.go
+++ b/libpod/image/pull.go
@@ -249,7 +249,11 @@ func (ir *Runtime) doPullImage(ctx context.Context, sc *types.SystemContext, goa
 	if err != nil {
 		return nil, err
 	}
-	defer policyContext.Destroy()
+	defer func() {
+		if err := policyContext.Destroy(); err != nil {
+			logrus.Errorf("failed to destroy policy context: %q", err)
+		}
+	}()
 
 	systemRegistriesConfPath := registries.SystemRegistriesConfPath()
 
@@ -304,7 +308,7 @@ func (ir *Runtime) doPullImage(ctx context.Context, sc *types.SystemContext, goa
 		return nil, pullErrors
 	}
 	if len(images) > 0 {
-		defer ir.newImageEvent(events.Pull, images[0])
+		ir.newImageEvent(events.Pull, images[0])
 	}
 	return images, nil
 }
diff --git a/libpod/kube.go b/libpod/kube.go
index 409937010..b114cda72 100644
--- a/libpod/kube.go
+++ b/libpod/kube.go
@@ -1,7 +1,6 @@
 package libpod
 
 import (
-	"fmt"
 	"math/rand"
 	"os"
 	"strconv"
@@ -179,7 +178,7 @@ func addContainersAndVolumesToPodObject(containers []v1.Container, volumes []v1.
 	labels["app"] = removeUnderscores(podName)
 	om := v12.ObjectMeta{
 		// The name of the pod is container_name-libpod
-		Name:   fmt.Sprintf("%s", removeUnderscores(podName)),
+		Name:   removeUnderscores(podName),
 		Labels: labels,
 		// CreationTimestamp seems to be required, so adding it; in doing so, the timestamp
 		// will reflect time this is run (not container create time) because the conversion
diff --git a/libpod/logs/log.go b/libpod/logs/log.go
index 488291cfe..0b1703567 100644
--- a/libpod/logs/log.go
+++ b/libpod/logs/log.go
@@ -156,8 +156,5 @@ func NewLogLine(line string) (*LogLine, error) {
 
 // Partial returns a bool if the log line is a partial log type
 func (l *LogLine) Partial() bool {
-	if l.ParseLogType == PartialLogType {
-		return true
-	}
-	return false
+	return l.ParseLogType == PartialLogType
 }
diff --git a/libpod/networking_linux.go b/libpod/networking_linux.go
index 987c1fc5b..bef3f7739 100644
--- a/libpod/networking_linux.go
+++ b/libpod/networking_linux.go
@@ -5,7 +5,6 @@ package libpod
 import (
 	"crypto/rand"
 	"fmt"
-	"github.com/containers/libpod/pkg/errorhandling"
 	"net"
 	"os"
 	"os/exec"
@@ -17,6 +16,7 @@ import (
 
 	cnitypes "github.com/containernetworking/cni/pkg/types/current"
 	"github.com/containernetworking/plugins/pkg/ns"
+	"github.com/containers/libpod/pkg/errorhandling"
 	"github.com/containers/libpod/pkg/firewall"
 	"github.com/containers/libpod/pkg/netns"
 	"github.com/containers/libpod/pkg/rootless"
@@ -151,8 +151,8 @@ func checkSlirpFlags(path string) (bool, bool, error) {
 
 // Configure the network namespace for a rootless container
 func (r *Runtime) setupRootlessNetNS(ctr *Container) (err error) {
-	defer ctr.rootlessSlirpSyncR.Close()
-	defer ctr.rootlessSlirpSyncW.Close()
+	defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncR)
+	defer errorhandling.CloseQuiet(ctr.rootlessSlirpSyncW)
 
 	path := r.config.NetworkCmdPath
 
@@ -201,7 +201,11 @@ func (r *Runtime) setupRootlessNetNS(ctr *Container) (err error) {
 	if err := cmd.Start(); err != nil {
 		return errors.Wrapf(err, "failed to start slirp4netns process")
 	}
-	defer cmd.Process.Release()
+	defer func() {
+		if err := cmd.Process.Release(); err != nil {
+			logrus.Errorf("unable to release comman process: %q", err)
+		}
+	}()
 
 	b := make([]byte, 16)
 	for {
@@ -268,7 +272,11 @@ func (r *Runtime) setupRootlessNetNS(ctr *Container) (err error) {
 			if err != nil {
 				return errors.Wrapf(err, "cannot open connection to %s", apiSocket)
 			}
-			defer conn.Close()
+			defer func() {
+				if err := conn.Close(); err != nil {
+					logrus.Errorf("unable to close connection: %q", err)
+				}
+			}()
 			hostIP := i.HostIP
 			if hostIP == "" {
 				hostIP = "0.0.0.0"
diff --git a/libpod/oci.go b/libpod/oci.go
index 6aad79cdf..566cbd821 100644
--- a/libpod/oci.go
+++ b/libpod/oci.go
@@ -273,7 +273,9 @@ func (r *OCIRuntime) updateContainerStatus(ctr *Container, useRuntime bool) erro
 		}
 		return errors.Wrapf(err, "error getting container %s state. stderr/out: %s", ctr.ID(), out)
 	}
-	defer cmd.Wait()
+	defer func() {
+		_ = cmd.Wait()
+	}()
 
 	if err := errPipe.Close(); err != nil {
 		return err
diff --git a/libpod/oci_linux.go b/libpod/oci_linux.go
index ca13d5517..044373ec5 100644
--- a/libpod/oci_linux.go
+++ b/libpod/oci_linux.go
@@ -124,7 +124,11 @@ func (r *OCIRuntime) createContainer(ctr *Container, cgroupParent string, restor
 					if err = unix.Unshare(unix.CLONE_NEWNS); err != nil {
 						return err
 					}
-					defer unix.Setns(int(fd.Fd()), unix.CLONE_NEWNS)
+					defer func() {
+						if err := unix.Setns(int(fd.Fd()), unix.CLONE_NEWNS); err != nil {
+							logrus.Errorf("unable to clone new namespace: %q", err)
+						}
+					}()
 
 					// don't spread our mounts around.  We are setting only /sys to be slave
 					// so that the cleanup process is still able to umount the storage and the
@@ -376,7 +380,9 @@ func (r *OCIRuntime) createOCIContainer(ctr *Container, cgroupParent string, res
 		errorhandling.CloseQuiet(childPipe)
 		return err
 	}
-	defer cmd.Wait()
+	defer func() {
+		_ = cmd.Wait()
+	}()
 
 	// We don't need childPipe on the parent side
 	if err := childPipe.Close(); err != nil {
diff --git a/libpod/options.go b/libpod/options.go
index 4f8bb42df..8d41764a9 100644
--- a/libpod/options.go
+++ b/libpod/options.go
@@ -1152,10 +1152,7 @@ func WithUserVolumes(volumes []string) CtrCreateOption {
 		}
 
 		ctr.config.UserVolumes = make([]string, 0, len(volumes))
-		for _, vol := range volumes {
-			ctr.config.UserVolumes = append(ctr.config.UserVolumes, vol)
-		}
-
+		ctr.config.UserVolumes = append(ctr.config.UserVolumes, volumes...)
 		return nil
 	}
 }
@@ -1172,10 +1169,7 @@ func WithEntrypoint(entrypoint []string) CtrCreateOption {
 		}
 
 		ctr.config.Entrypoint = make([]string, 0, len(entrypoint))
-		for _, str := range entrypoint {
-			ctr.config.Entrypoint = append(ctr.config.Entrypoint, str)
-		}
-
+		ctr.config.Entrypoint = append(ctr.config.Entrypoint, entrypoint...)
 		return nil
 	}
 }
@@ -1192,10 +1186,7 @@ func WithCommand(command []string) CtrCreateOption {
 		}
 
 		ctr.config.Command = make([]string, 0, len(command))
-		for _, str := range command {
-			ctr.config.Command = append(ctr.config.Command, str)
-		}
-
+		ctr.config.Command = append(ctr.config.Command, command...)
 		return nil
 	}
 }
diff --git a/pkg/adapter/checkpoint_restore.go b/pkg/adapter/checkpoint_restore.go
index 97ba5ecf7..ec1464fb1 100644
--- a/pkg/adapter/checkpoint_restore.go
+++ b/pkg/adapter/checkpoint_restore.go
@@ -4,16 +4,19 @@ package adapter
 
 import (
 	"context"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
 	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/libpod/image"
+	"github.com/containers/libpod/pkg/errorhandling"
 	"github.com/containers/storage/pkg/archive"
 	jsoniter "github.com/json-iterator/go"
 	spec "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/pkg/errors"
-	"io"
-	"io/ioutil"
-	"os"
-	"path/filepath"
+	"github.com/sirupsen/logrus"
 )
 
 // Prefixing the checkpoint/restore related functions with 'cr'
@@ -25,7 +28,7 @@ func crImportFromJSON(filePath string, v interface{}) error {
 	if err != nil {
 		return errors.Wrapf(err, "Failed to open container definition %s for restore", filePath)
 	}
-	defer jsonFile.Close()
+	defer errorhandling.CloseQuiet(jsonFile)
 
 	content, err := ioutil.ReadAll(jsonFile)
 	if err != nil {
@@ -48,7 +51,7 @@ func crImportCheckpoint(ctx context.Context, runtime *libpod.Runtime, input stri
 	if err != nil {
 		return nil, errors.Wrapf(err, "Failed to open checkpoint archive %s for import", input)
 	}
-	defer archiveFile.Close()
+	defer errorhandling.CloseQuiet(archiveFile)
 	options := &archive.TarOptions{
 		// Here we only need the files config.dump and spec.dump
 		ExcludePatterns: []string{
@@ -62,15 +65,19 @@ func crImportCheckpoint(ctx context.Context, runtime *libpod.Runtime, input stri
 	if err != nil {
 		return nil, err
 	}
-	defer os.RemoveAll(dir)
+	defer func() {
+		if err := os.RemoveAll(dir); err != nil {
+			logrus.Errorf("could not recursively remove %s: %q", dir, err)
+		}
+	}()
 	err = archive.Untar(archiveFile, dir, options)
 	if err != nil {
 		return nil, errors.Wrapf(err, "Unpacking of checkpoint archive %s failed", input)
 	}
 
 	// Load spec.dump from temporary directory
-	spec := new(spec.Spec)
-	if err := crImportFromJSON(filepath.Join(dir, "spec.dump"), spec); err != nil {
+	dumpSpec := new(spec.Spec)
+	if err := crImportFromJSON(filepath.Join(dir, "spec.dump"), dumpSpec); err != nil {
 		return nil, err
 	}
 
@@ -112,7 +119,7 @@ func crImportCheckpoint(ctx context.Context, runtime *libpod.Runtime, input stri
 	}
 
 	// Now create a new container from the just loaded information
-	container, err := runtime.RestoreContainer(ctx, spec, config)
+	container, err := runtime.RestoreContainer(ctx, dumpSpec, config)
 	if err != nil {
 		return nil, err
 	}
@@ -127,7 +134,7 @@ func crImportCheckpoint(ctx context.Context, runtime *libpod.Runtime, input stri
 		return nil, errors.Errorf("Name of restored container (%s) does not match requested name (%s)", containerConfig.Name, ctrName)
 	}
 
-	if newName == false {
+	if !newName {
 		// Only check ID for a restore with the same name.
 		// Using -n to request a new name for the restored container, will also create a new ID
 		if containerConfig.ID != ctrID {
diff --git a/pkg/adapter/containers.go b/pkg/adapter/containers.go
index 1cf9d686a..86e9c0266 100644
--- a/pkg/adapter/containers.go
+++ b/pkg/adapter/containers.go
@@ -213,8 +213,8 @@ func (r *LocalRuntime) RemoveContainers(ctx context.Context, cli *cliconfig.RmVa
 		c := c
 
 		pool.Add(shared.Job{
-			c.ID(),
-			func() error {
+			ID: c.ID(),
+			Fn: func() error {
 				err := r.RemoveContainer(ctx, c, cli.Force, cli.Volumes)
 				if err != nil {
 					logrus.Debugf("Failed to remove container %s: %s", c.ID(), err.Error())
diff --git a/pkg/adapter/pods.go b/pkg/adapter/pods.go
index a28e1ab4b..b45b02d09 100644
--- a/pkg/adapter/pods.go
+++ b/pkg/adapter/pods.go
@@ -70,8 +70,9 @@ func (r *LocalRuntime) PrunePods(ctx context.Context, cli *cliconfig.PodPruneVal
 	for _, p := range pods {
 		p := p
 
-		pool.Add(shared.Job{p.ID(),
-			func() error {
+		pool.Add(shared.Job{
+			ID: p.ID(),
+			Fn: func() error {
 				err := r.Runtime.RemovePod(ctx, p, cli.Force, cli.Force)
 				if err != nil {
 					logrus.Debugf("Failed to remove pod %s: %s", p.ID(), err.Error())
diff --git a/pkg/adapter/runtime.go b/pkg/adapter/runtime.go
index 8ef88f36b..e65f07898 100644
--- a/pkg/adapter/runtime.go
+++ b/pkg/adapter/runtime.go
@@ -359,9 +359,6 @@ func (r *LocalRuntime) Events(c *cliconfig.EventValues) error {
 	if eventsError != nil {
 		return eventsError
 	}
-	if err != nil {
-		return errors.Wrapf(err, "unable to tail the events log")
-	}
 	w := bufio.NewWriter(os.Stdout)
 	for event := range eventChannel {
 		if len(c.Format) > 0 {
diff --git a/pkg/adapter/terminal_linux.go b/pkg/adapter/terminal_linux.go
index be7dc0cb6..e3255ecb6 100644
--- a/pkg/adapter/terminal_linux.go
+++ b/pkg/adapter/terminal_linux.go
@@ -39,7 +39,11 @@ func StartAttachCtr(ctx context.Context, ctr *libpod.Container, stdout, stderr,
 			return err
 		}
 
-		defer restoreTerminal(oldTermState)
+		defer func() {
+			if err := restoreTerminal(oldTermState); err != nil {
+				logrus.Errorf("unable to restore terminal: %q", err)
+			}
+		}()
 	}
 
 	streams := new(libpod.AttachStreams)
diff --git a/pkg/netns/netns_linux.go b/pkg/netns/netns_linux.go
index 4a515c72a..1d6fb873c 100644
--- a/pkg/netns/netns_linux.go
+++ b/pkg/netns/netns_linux.go
@@ -28,6 +28,7 @@ import (
 	"sync"
 
 	"github.com/containernetworking/plugins/pkg/ns"
+	"github.com/sirupsen/logrus"
 	"golang.org/x/sys/unix"
 )
 
@@ -90,7 +91,9 @@ func NewNS() (ns.NetNS, error) {
 	// Ensure the mount point is cleaned up on errors; if the namespace
 	// was successfully mounted this will have no effect because the file
 	// is in-use
-	defer os.RemoveAll(nsPath)
+	defer func() {
+		_ = os.RemoveAll(nsPath)
+	}()
 
 	var wg sync.WaitGroup
 	wg.Add(1)
@@ -109,7 +112,11 @@ func NewNS() (ns.NetNS, error) {
 		if err != nil {
 			return
 		}
-		defer origNS.Close()
+		defer func() {
+			if err := origNS.Close(); err != nil {
+				logrus.Errorf("unable to close namespace: %q", err)
+			}
+		}()
 
 		// create a new netns on the current thread
 		err = unix.Unshare(unix.CLONE_NEWNET)
@@ -118,7 +125,11 @@ func NewNS() (ns.NetNS, error) {
 		}
 
 		// Put this thread back to the orig ns, since it might get reused (pre go1.10)
-		defer origNS.Set()
+		defer func() {
+			if err := origNS.Set(); err != nil {
+				logrus.Errorf("unable to set namespace: %q", err)
+			}
+		}()
 
 		// bind mount the netns from the current thread (from /proc) onto the
 		// mount point. This causes the namespace to persist, even when there
diff --git a/pkg/rootless/rootless_linux.go b/pkg/rootless/rootless_linux.go
index d7c2de81d..99a0eb729 100644
--- a/pkg/rootless/rootless_linux.go
+++ b/pkg/rootless/rootless_linux.go
@@ -220,7 +220,11 @@ func EnableLinger() (string, error) {
 
 	conn, err := dbus.SystemBus()
 	if err == nil {
-		defer conn.Close()
+		defer func() {
+			if err := conn.Close(); err != nil {
+				logrus.Errorf("unable to close dbus connection: %q", err)
+			}
+		}()
 	}
 
 	lingerEnabled := false
@@ -310,13 +314,21 @@ func joinUserAndMountNS(pid uint, pausePid string) (bool, int, error) {
 	if err != nil {
 		return false, -1, err
 	}
-	defer userNS.Close()
+	defer func() {
+		if err := userNS.Close(); err != nil {
+			logrus.Errorf("unable to close namespace: %q", err)
+		}
+	}()
 
 	mountNS, err := os.Open(fmt.Sprintf("/proc/%d/ns/mnt", pid))
 	if err != nil {
 		return false, -1, err
 	}
-	defer userNS.Close()
+	defer func() {
+		if err := mountNS.Close(); err != nil {
+			logrus.Errorf("unable to close namespace: %q", err)
+		}
+	}()
 
 	fd, err := getUserNSFirstChild(userNS.Fd())
 	if err != nil {
@@ -364,7 +376,11 @@ func becomeRootInUserNS(pausePid, fileToRead string, fileOutput *os.File) (bool,
 
 	defer errorhandling.CloseQuiet(r)
 	defer errorhandling.CloseQuiet(w)
-	defer w.Write([]byte("0"))
+	defer func() {
+		if _, err := w.Write([]byte("0")); err != nil {
+			logrus.Errorf("failed to write byte 0: %q", err)
+		}
+	}()
 
 	pidC := C.reexec_in_user_namespace(C.int(r.Fd()), cPausePid, cFileToRead, fileOutputFD)
 	pid := int(pidC)