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-rw-r--r--sandbox/mac/policy.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/sandbox/mac/policy.h b/sandbox/mac/policy.h
index 01ea85a..0cedcb8 100644
--- a/sandbox/mac/policy.h
+++ b/sandbox/mac/policy.h
@@ -42,7 +42,8 @@ struct SANDBOX_EXPORT Rule {
PolicyDecision result;
// The Rule does not take ownership of this port, but additional send rights
- // will be allocated to it before it is sent to a client.
+ // will be allocated to it before it is sent to a client. This name must
+ // denote a send right that can duplicated with MACH_MSG_TYPE_COPY_SEND.
mach_port_t substitute_port;
};