@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $ PostgreSQL : pgsql / src / backend / utils / adt / acl . c , v 1.107 2004 / 07 / 12 20 : 23 : 50 momjian Exp $
* $ PostgreSQL : pgsql / src / backend / utils / adt / acl . c , v 1.108 2004 / 08 / 01 20 : 30 : 49 tgl Exp $
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
@ -717,6 +717,109 @@ aclupdate(const Acl *old_acl, const AclItem *mod_aip,
return new_acl ;
}
/*
* Update an ACL array to reflect a change of owner to the parent object
*
* old_acl : the input ACL array ( must not be NULL )
* oldownerid : AclId of the old object owner
* newownerid : AclId of the new object owner
*
* The result is a modified copy ; the input object is not changed .
*
* NB : caller is responsible for having detoasted the input ACL , if needed .
*/
Acl *
aclnewowner ( const Acl * old_acl , AclId oldownerid , AclId newownerid )
{
Acl * new_acl ;
AclItem * new_aip ;
AclItem * old_aip ;
AclItem * dst_aip ;
AclItem * src_aip ;
AclItem * targ_aip ;
bool newpresent = false ;
int dst ,
src ,
targ ,
num ;
/*
* Make a copy of the given ACL , substituting new owner ID for old
* wherever it appears as either grantor or grantee . Also note if
* the new owner ID is already present .
*/
num = ACL_NUM ( old_acl ) ;
old_aip = ACL_DAT ( old_acl ) ;
new_acl = allocacl ( num ) ;
new_aip = ACL_DAT ( new_acl ) ;
memcpy ( new_aip , old_aip , num * sizeof ( AclItem ) ) ;
for ( dst = 0 , dst_aip = new_aip ; dst < num ; dst + + , dst_aip + + )
{
/* grantor is always a UID, but grantee might not be */
if ( dst_aip - > ai_grantor = = oldownerid )
dst_aip - > ai_grantor = newownerid ;
else if ( dst_aip - > ai_grantor = = newownerid )
newpresent = true ;
if ( ACLITEM_GET_IDTYPE ( * dst_aip ) = = ACL_IDTYPE_UID )
{
if ( dst_aip - > ai_grantee = = oldownerid )
dst_aip - > ai_grantee = newownerid ;
else if ( dst_aip - > ai_grantee = = newownerid )
newpresent = true ;
}
}
/*
* If the old ACL contained any references to the new owner , then we
* may now have generated an ACL containing duplicate entries . Find
* them and merge them so that there are not duplicates . ( This is
* relatively expensive since we use a stupid O ( N ^ 2 ) algorithm , but
* it ' s unlikely to be the normal case . )
*
* To simplify deletion of duplicate entries , we temporarily leave them
* in the array but set their privilege masks to zero ; when we reach
* such an entry it ' s just skipped . ( Thus , a side effect of this code
* will be to remove privilege - free entries , should there be any in the
* input . ) dst is the next output slot , targ is the currently considered
* input slot ( always > = dst ) , and src scans entries to the right of targ
* looking for duplicates . Once an entry has been emitted to dst it is
* known duplicate - free and need not be considered anymore .
*/
if ( newpresent )
{
dst = 0 ;
for ( targ = 0 , targ_aip = new_aip ; targ < num ; targ + + , targ_aip + + )
{
/* ignore if deleted in an earlier pass */
if ( ACLITEM_GET_RIGHTS ( * targ_aip ) = = ACL_NO_RIGHTS )
continue ;
/* find and merge any duplicates */
for ( src = targ + 1 , src_aip = targ_aip + 1 ; src < num ;
src + + , src_aip + + )
{
if ( ACLITEM_GET_RIGHTS ( * src_aip ) = = ACL_NO_RIGHTS )
continue ;
if ( aclitem_match ( targ_aip , src_aip ) )
{
ACLITEM_SET_RIGHTS ( * targ_aip ,
ACLITEM_GET_RIGHTS ( * targ_aip ) |
ACLITEM_GET_RIGHTS ( * src_aip ) ) ;
/* mark the duplicate deleted */
ACLITEM_SET_RIGHTS ( * src_aip , ACL_NO_RIGHTS ) ;
}
}
/* and emit to output */
new_aip [ dst ] = * targ_aip ;
dst + + ;
}
/* Adjust array size to be 'dst' items */
ARR_DIMS ( new_acl ) [ 0 ] = dst ;
ARR_SIZE ( new_acl ) = ACL_N_SIZE ( dst ) ;
}
return new_acl ;
}
/*
* When granting grant options , we must disallow attempts to set up circular
@ -2373,15 +2476,15 @@ convert_tablespace_name(text *tablespacename)
{
char * spcname ;
Oid oid ;
spcname = DatumGetCString ( DirectFunctionCall1 ( textout ,
PointerGetDatum ( tablespacename ) ) ) ;
PointerGetDatum ( tablespacename ) ) ) ;
oid = get_tablespace_oid ( spcname ) ;
if ( ! OidIsValid ( oid ) )
ereport ( ERROR ,
( errcode ( ERRCODE_UNDEFINED_OBJECT ) ,
errmsg ( " tablespace \" %s \" does not exist " , spcname ) ) ) ;
if ( ! OidIsValid ( oid ) )
ereport ( ERROR ,
( errcode ( ERRCODE_UNDEFINED_OBJECT ) ,
errmsg ( " tablespace \" %s \" does not exist " , spcname ) ) ) ;
return oid ;
}
Tom Lane
22 years ago