Don't fail if /etc/passwd or /etc/group does not exists

Container images can be created without passwd or group file, currently
if one of these containers gets run with a --user flag the container blows
up complaining about t a missing /etc/passwd file.

We just need to check if the error on read is ENOEXIST then allow the
read to return, not fail.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/pkg/lookup/lookup.go b/pkg/lookup/lookup.go
index b27e2a724..a9d975b4b 100644
--- a/pkg/lookup/lookup.go
+++ b/pkg/lookup/lookup.go
@@ -1,10 +1,12 @@
 package lookup
 
 import (
+	"os"
+	"strconv"
+
 	"github.com/cyphar/filepath-securejoin"
 	"github.com/opencontainers/runc/libcontainer/user"
 	"github.com/sirupsen/logrus"
-	"strconv"
 )
 
 const (
@@ -116,7 +118,7 @@ func GetUser(containerMount, userIDorName string) (*user.User, error) {
 		}
 		return u.Uid == uid
 	})
-	if err != nil {
+	if err != nil && !os.IsNotExist(err) {
 		return nil, err
 	}
 	if len(users) > 0 {
@@ -146,7 +148,7 @@ func GetGroup(containerMount, groupIDorName string) (*user.Group, error) {
 		}
 		return g.Gid == gid
 	})
-	if err != nil {
+	if err != nil && !os.IsNotExist(err) {
 		return nil, err
 	}
 	if len(groups) > 0 {