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Commit894fc6b

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committed
Fix aclexplode to not explode on a zero-entry ACL array.
(An Assert is no substitute for thinking clearly :-()Minor style kibitzing too.Per report from Robert Treat.
1 parent6ce4e4f commit894fc6b

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1 file changed

+16
-14
lines changed
  • src/backend/utils/adt

1 file changed

+16
-14
lines changed

‎src/backend/utils/adt/acl.c

Lines changed: 16 additions & 14 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/utils/adt/acl.c,v 1.154 2010/01/02 16:57:53 momjian Exp $
11+
* $PostgreSQL: pgsql/src/backend/utils/adt/acl.c,v 1.155 2010/01/12 02:39:22 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -1680,9 +1680,9 @@ convert_aclright_to_string(int aclright)
16801680
Datum
16811681
aclexplode(PG_FUNCTION_ARGS)
16821682
{
1683+
Acl*acl=PG_GETARG_ACL_P(0);
16831684
FuncCallContext*funcctx;
16841685
int*idx;
1685-
Acl*acl=PG_GETARG_ACL_P(0);
16861686
AclItem*aidat;
16871687

16881688
if (SRF_IS_FIRSTCALL())
@@ -1722,34 +1722,36 @@ aclexplode(PG_FUNCTION_ARGS)
17221722

17231723
funcctx=SRF_PERCALL_SETUP();
17241724
idx= (int*)funcctx->user_fctx;
1725-
17261725
aidat=ACL_DAT(acl);
1727-
while (1)
1726+
1727+
/* need test here in case acl has no items */
1728+
while (idx[0]<ACL_NUM(acl))
17281729
{
1730+
AclItem*aidata;
1731+
AclModepriv_bit;
1732+
17291733
idx[1]++;
17301734
if (idx[1]==N_ACL_RIGHTS)
17311735
{
17321736
idx[1]=0;
17331737
idx[0]++;
1734-
if (idx[0]==ACL_NUM(acl))
1735-
/* done */
1738+
if (idx[0] >=ACL_NUM(acl))/* done */
17361739
break;
17371740
}
1741+
aidata=&aidat[idx[0]];
1742+
priv_bit=1 <<idx[1];
17381743

1739-
Assert(idx[0]<ACL_NUM(acl));
1740-
Assert(idx[1]<N_ACL_RIGHTS);
1741-
1742-
if (ACLITEM_GET_PRIVS(aidat[idx[0]])& (1 <<idx[1]))
1744+
if (ACLITEM_GET_PRIVS(*aidata)&priv_bit)
17431745
{
17441746
Datumresult;
17451747
Datumvalues[4];
17461748
boolnulls[4];
17471749
HeapTupletuple;
17481750

1749-
values[0]=ObjectIdGetDatum(aidat[idx[0]].ai_grantor);
1750-
values[1]=ObjectIdGetDatum(aidat[idx[0]].ai_grantee);
1751-
values[2]=CStringGetTextDatum(convert_aclright_to_string(1 <<idx[1]));
1752-
values[3]=BoolGetDatum(ACLITEM_GET_GOPTIONS(aidat[idx[0]])&(1 <<idx[1]));
1751+
values[0]=ObjectIdGetDatum(aidata->ai_grantor);
1752+
values[1]=ObjectIdGetDatum(aidata->ai_grantee);
1753+
values[2]=CStringGetTextDatum(convert_aclright_to_string(priv_bit));
1754+
values[3]=BoolGetDatum((ACLITEM_GET_GOPTIONS(*aidata)&priv_bit)!=0);
17531755

17541756
MemSet(nulls,0,sizeof(nulls));
17551757

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