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Adjust permissions checking for ALTER OWNER commands: instead of

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requiring superuserness always, allow an owner to reassign ownership
to any role he is a member of, if that role would have the right to
create a similar object.  These three requirements essentially state
that the would-be alterer has enough privilege to DROP the existing
object and then re-CREATE it as the new role; so we might as well
let him do it in one step.  The ALTER TABLESPACE case is a bit
squirrely, but the whole concept of non-superuser tablespace owners
is pretty dubious anyway.  Stephen Frost, code review by Tom Lane.
This commit is contained in:
Tom Lane
2005-07-14 21:46:30 +00:00
parent bd15782164
commit aa1110624c
12 changed files with 229 additions and 109 deletions
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22
src/backend/commands/opclasscmds.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/opclasscmds.c,v 1.34 2005/07/07 20:39:58 tgl Exp $
* $PostgreSQL: pgsql/src/backend/commands/opclasscmds.c,v 1.35 2005/07/14 21:46:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -892,6 +892,7 @@ AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
char *opcname;
HeapTuple tup;
Relation rel;
AclResult aclresult;
Form_pg_opclass opcForm;
amOid = GetSysCacheOid(AMNAME,
@ -950,11 +951,20 @@ AlterOpClassOwner(List *name, const char *access_method, Oid newOwnerId)
*/
if (opcForm->opcowner != newOwnerId)
{
/* Otherwise, must be superuser to change object ownership */
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to change owner")));
/* Otherwise, must be owner of the existing object */
if (!pg_opclass_ownercheck(HeapTupleGetOid(tup),GetUserId()))
aclcheck_error(ACLCHECK_NOT_OWNER, ACL_KIND_OPCLASS,
NameListToString(name));
/* Must be able to become new owner */
check_is_member_of_role(GetUserId(), newOwnerId);
/* New owner must have CREATE privilege on namespace */
aclresult = pg_namespace_aclcheck(namespaceOid, newOwnerId,
ACL_CREATE);
if (aclresult != ACLCHECK_OK)
aclcheck_error(aclresult, ACL_KIND_NAMESPACE,
get_namespace_name(namespaceOid));
/*
* Modify the owner --- okay to scribble on tup because it's a