Fix unsupported files exporting functions for apparmor and seccomp

Signed-off-by: Derek McGowan <derek@mcg.dev>

pkg/seccomp/seccomp.go

@@ -0,0 +1,25 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package seccomp
+
+// IsEnabled returns whether seccomp support is enabled
+// On Linux returns if the kernel has been configured to support seccomp.
+//  From https://github.com/opencontainers/runc/blob/v1.0.0-rc91/libcontainer/seccomp/seccomp_linux.go#L86-L102
+// On non-Linux returns false
+func IsEnabled() bool {
+	return isEnabled()
+}

pkg/seccomp/seccomp_linux.go

@@ -40,9 +40,9 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-// IsEnabled returns if the kernel has been configured to support seccomp.
+// isEnabled returns if the kernel has been configured to support seccomp.
 // From https://github.com/opencontainers/runc/blob/v1.0.0-rc91/libcontainer/seccomp/seccomp_linux.go#L86-L102
-func IsEnabled() bool {
+func isEnabled() bool {
 	// Try to read from /proc/self/status for kernels > 3.8
 	s, err := parseStatusFile("/proc/self/status")
 	if err != nil {

pkg/seccomp/seccomp_unsupported.go

@@ -18,6 +18,6 @@
 
 package seccomp
 
-func IsEnabled() bool {
+func isEnabled() bool {
 	return false
 }