chore: vendor

vendor/github.com/containers/image/pkg/keyctl/perm.go

@@ -0,0 +1,34 @@
+// Copyright 2015 Jesse Sipprell. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build linux
+// +build linux
+
+package keyctl
+
+import (
+	"golang.org/x/sys/unix"
+)
+
+// KeyPerm represents in-kernel access control permission to keys and keyrings
+// as a 32-bit integer broken up into four permission sets, one per byte.
+// In MSB order, the perms are: Processor, User, Group, Other.
+type KeyPerm uint32
+
+const (
+	// PermOtherAll sets all permission for Other
+	PermOtherAll KeyPerm = 0x3f << (8 * iota)
+	// PermGroupAll sets all permission for Group
+	PermGroupAll
+	// PermUserAll sets all permission for User
+	PermUserAll
+	// PermProcessAll sets all permission for Processor
+	PermProcessAll
+)
+
+// SetPerm sets the permissions on a key or keyring.
+func SetPerm(k ID, p KeyPerm) error {
+	err := unix.KeyctlSetperm(int(k.ID()), uint32(p))
+	return err
+}