From 5ac372fc1a7cc673cc7d4cf26ba651d52495b27a Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Thu, 23 Oct 2014 08:18:45 -0400
Subject: [PATCH] Add a function to get the authenticated user ID.
Previously, this was not exposed outside of miscinit.c. It is needed
for the pending pg_background patch, and will also be needed for
parallelism. Without it, there's no way for a background worker to
re-create the exact authentication environment that was present in the
process that started it, which could lead to security exposures.
---
src/backend/utils/init/miscinit.c | 10 ++++++++++
src/include/miscadmin.h | 1 +
2 files changed, 11 insertions(+)
diff --git a/src/backend/utils/init/miscinit.c b/src/backend/utils/init/miscinit.c
index a703c67eadd..8fccb4c8262 100644
--- a/src/backend/utils/init/miscinit.c
+++ b/src/backend/utils/init/miscinit.c
@@ -222,6 +222,16 @@ SetSessionUserId(Oid userid, bool is_superuser)
CurrentUserId = userid;
}
+/*
+ * GetAuthenticatedUserId - get the authenticated user ID
+ */
+Oid
+GetAuthenticatedUserId(void)
+{
+ AssertState(OidIsValid(AuthenticatedUserId));
+ return AuthenticatedUserId;
+}
+
/*
* GetUserIdAndSecContext/SetUserIdAndSecContext - get/set the current user ID
diff --git a/src/include/miscadmin.h b/src/include/miscadmin.h
index 2ba98856ff2..1558a75fbde 100644
--- a/src/include/miscadmin.h
+++ b/src/include/miscadmin.h
@@ -283,6 +283,7 @@ extern char *GetUserNameFromId(Oid roleid);
extern Oid GetUserId(void);
extern Oid GetOuterUserId(void);
extern Oid GetSessionUserId(void);
+extern Oid GetAuthenticatedUserId(void);
extern void GetUserIdAndSecContext(Oid *userid, int *sec_context);
extern void SetUserIdAndSecContext(Oid userid, int sec_context);
extern bool InLocalUserIdChange(void);
--
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