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/*-------------------------------------------------------------------------
*
* superuser.c
* The superuser() function. Determines if user has superuser privilege.
* Also, a function to check for the owner (datdba) of a database.
*
*
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/misc/superuser.c,v 1.24 2002/08/09 16:45:14 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/heapam.h"
#include "catalog/pg_shadow.h"
#include "commands/dbcommands.h"
#include "utils/syscache.h"
#include "miscadmin.h"
/*
* The Postgres user running this command has Postgres superuser privileges
*
* All code should use either of these two functions to find out
* whether a given user is a superuser, rather than evaluating
* pg_shadow.usesuper directly, so that the escape hatch built in for
* the single-user case works.
*/
bool
superuser(void)
{
return superuser_arg(GetUserId());
}
bool
superuser_arg(Oid userid)
{
bool result = false;
HeapTuple utup;
/* Special escape path in case you deleted all your users. */
if (!IsUnderPostmaster && userid == BOOTSTRAP_USESYSID)
return true;
utup = SearchSysCache(SHADOWSYSID,
ObjectIdGetDatum(userid),
0, 0, 0);
if (HeapTupleIsValid(utup))
{
result = ((Form_pg_shadow) GETSTRUCT(utup))->usesuper;
ReleaseSysCache(utup);
}
return result;
}
/*
* The Postgres user running this command is the owner of the specified
* database.
*/
bool
is_dbadmin(Oid dbid)
{
Oid dba;
dba = get_database_owner(dbid);
return (GetUserId() == dba);
}
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