61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* superuser.c
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* The superuser() function. Determines if user has superuser privilege.
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* Also, a function to check for the owner (datdba) of a database.
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*
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/misc/superuser.c,v 1.27 2003/08/04 02:40:08 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "access/heapam.h"
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#include "catalog/pg_shadow.h"
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#include "commands/dbcommands.h"
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#include "utils/syscache.h"
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#include "miscadmin.h"
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/*
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* The Postgres user running this command has Postgres superuser privileges
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*
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* All code should use either of these two functions to find out
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* whether a given user is a superuser, rather than evaluating
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* pg_shadow.usesuper directly, so that the escape hatch built in for
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* the single-user case works.
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*/
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bool
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superuser(void)
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{
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return superuser_arg(GetUserId());
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}
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bool
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superuser_arg(AclId userid)
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{
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bool result = false;
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HeapTuple utup;
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/* Special escape path in case you deleted all your users. */
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if (!IsUnderPostmaster && userid == BOOTSTRAP_USESYSID)
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return true;
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utup = SearchSysCache(SHADOWSYSID,
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Int32GetDatum(userid),
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0, 0, 0);
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if (HeapTupleIsValid(utup))
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{
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result = ((Form_pg_shadow) GETSTRUCT(utup))->usesuper;
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ReleaseSysCache(utup);
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}
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return result;
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}
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