linter: enable nilerr

A number of cases looked suspicious, so I marked them with `FIXME`s to
leave some breadcrumbs.

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

3 files changed, 8 insertions, 5 deletions

diff --git a/libpod/boltdb_state.go b/libpod/boltdb_state.go
index 6389431ab..a826c663d 100644
--- a/libpod/boltdb_state.go
+++ b/libpod/boltdb_state.go
@@ -366,7 +366,8 @@ func (s *BoltState) GetDBConfig() (*DBConfig, error) {
 	err = db.View(func(tx *bolt.Tx) error {
 		configBucket, err := getRuntimeConfigBucket(tx)
 		if err != nil {
-			return nil
+			// FIXME: this error should probably be returned
+			return nil // nolint: nilerr
 		}
 
 		// Some of these may be nil
diff --git a/libpod/container_internal_linux.go b/libpod/container_internal_linux.go
index 75250b9b1..de866f6b0 100644
--- a/libpod/container_internal_linux.go
+++ b/libpod/container_internal_linux.go
@@ -2587,7 +2587,7 @@ func (c *Container) generateUserGroupEntry(addedGID int) (string, int, error) {
 
 	gid, err := strconv.ParseUint(group, 10, 32)
 	if err != nil {
-		return "", 0, nil
+		return "", 0, nil // nolint: nilerr
 	}
 
 	if addedGID != 0 && addedGID == int(gid) {
@@ -2740,7 +2740,8 @@ func (c *Container) generateUserPasswdEntry(addedUID int) (string, int, int, err
 	// If a non numeric User, then don't generate passwd
 	uid, err := strconv.ParseUint(userspec, 10, 32)
 	if err != nil {
-		return "", 0, 0, nil
+		// FIXME: this error should probably be returned
+		return "", 0, 0, nil // nolint: nilerr
 	}
 
 	if addedUID != 0 && int(uid) == addedUID {
diff --git a/libpod/oci_conmon_linux.go b/libpod/oci_conmon_linux.go
index 66123dbf4..ba4079bed 100644
--- a/libpod/oci_conmon_linux.go
+++ b/libpod/oci_conmon_linux.go
@@ -750,7 +750,7 @@ func openControlFile(ctr *Container, parentDir string) (*os.File, error) {
 	for i := 0; i < 600; i++ {
 		controlFile, err := os.OpenFile(controlPath, unix.O_WRONLY|unix.O_NONBLOCK, 0)
 		if err == nil {
-			return controlFile, err
+			return controlFile, nil
 		}
 		if !isRetryable(err) {
 			return nil, errors.Wrapf(err, "could not open ctl file for terminal resize for container %s", ctr.ID())
@@ -1015,7 +1015,8 @@ func (r *ConmonOCIRuntime) getLogTag(ctr *Container) (string, error) {
 	}
 	data, err := ctr.inspectLocked(false)
 	if err != nil {
-		return "", nil
+		// FIXME: this error should probably be returned
+		return "", nil // nolint: nilerr
 	}
 	tmpl, err := template.New("container").Parse(logTag)
 	if err != nil {