add returns

protect.go

@@ -16,8 +16,8 @@ package protect
 // Preventing access to anything else.
 //
 // On non-OpenBSD machines this call is a noop.
-func Unveil(path string, flags string) {
-	unveil(path, flags)
+func Unveil(path string, flags string) error {
+	return unveil(path, flags)
 }
 
 // UnveilBlock locks the Unveil'd paths. Preventing further changes to a
@@ -32,6 +32,6 @@ func UnveilBlock() error {
 // the system calls a process can make.
 //
 // On non-OpenBSD machines this call is a noop.
-func Pledge(promises string) {
-	pledge(promises)
+func Pledge(promises string) error {
+	return pledge(promises)
 }

protect_openbsd.go

@@ -6,14 +6,14 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-func unveil(path string, flags string) {
-	unix.Unveil(path, flags)
+func unveil(path string, flags string) error {
+	return unix.Unveil(path, flags)
 }
 
 func unveilBlock() error {
 	return unix.UnveilBlock()
 }
 
-func pledge(promises string) {
-	unix.PledgePromises(promises)
+func pledge(promises string) error {
+	return unix.PledgePromises(promises)
 }

protect_stubs.go

@@ -2,8 +2,14 @@
 
 package protect
 
-func unveil(path string, flags string) {}
+func unveil(path string, flags string) error {
+	return nil
+}
 
-func unveilBlock() error {}
+func unveilBlock() error {
+	return nil
+}
 
-func pledge(promises string) {}
+func pledge(promises string) error {
+	return nil
+}