* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/backend/utils/init/flatfiles.c,v 1.1 2005/02/20 02:22:00 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/init/flatfiles.c,v 1.2 2005/02/20 04:45:59 tgl Exp $
*
*-------------------------------------------------------------------------
*/
}
/*
- * File format is: "dbname" oid frozenxid
+ * The file format is: "dbname" oid frozenxid
*
* The xid is not needed for backend startup, but may be of use
* for forensic purposes.
/*
* write_group_file: update the flat group file
- *
- * XXX this will never be able to work during system bootstrap: we don't
- * have either TOAST support or SysCache support. Need to redefine both
- * the catalog and file contents to fix this completely. In the short term
- * we can handle everything except an out-of-line-toasted grolist, if we
- * change the flat file definition to store numeric sysids instead of
- * user names.
*/
static void
write_group_file(Relation grel)
mode_t oumask;
HeapScanDesc scan;
HeapTuple tuple;
- TupleDesc dsc = RelationGetDescr(grel);
/*
* Create a temporary filename to be renamed later. This prevents the
scan = heap_beginscan(grel, SnapshotSelf, 0, NULL);
while ((tuple = heap_getnext(scan, ForwardScanDirection)) != NULL)
{
- Datum datum,
- grolist_datum;
- bool isnull;
+ Form_pg_group grpform = (Form_pg_group) GETSTRUCT(tuple);
+ HeapTupleHeader tup = tuple->t_data;
+ char *tp; /* ptr to tuple data */
+ long off; /* offset in tuple data */
+ bits8 *bp = tup->t_bits; /* ptr to null bitmask in tuple */
+ Datum datum;
char *groname;
IdList *grolist_p;
AclId *aidp;
int i,
num;
- char *usename;
- bool first_user = true;
- datum = heap_getattr(tuple, Anum_pg_group_groname, dsc, &isnull);
- /* ignore NULL groupnames --- shouldn't happen */
- if (isnull)
- continue;
- groname = NameStr(*DatumGetName(datum));
+ groname = NameStr(grpform->groname);
/*
* Check for illegal characters in the group name.
continue;
}
- grolist_datum = heap_getattr(tuple, Anum_pg_group_grolist, dsc, &isnull);
- /* Ignore NULL group lists */
- if (isnull)
+ /*
+ * We can't use heap_getattr() here because during startup we will
+ * not have any tupdesc for pg_group. Fortunately it's not too
+ * hard to work around this. grolist is the first possibly-null
+ * field so we can compute its offset directly.
+ */
+ tp = (char *) tup + tup->t_hoff;
+ off = offsetof(FormData_pg_group, grolist);
+
+ if (HeapTupleHasNulls(tuple) &&
+ att_isnull(Anum_pg_group_grolist - 1, bp))
+ {
+ /* grolist is null, so we can ignore this group */
+ continue;
+ }
+
+ /* assume grolist is pass-by-ref */
+ datum = PointerGetDatum(tp + off);
+
+ /*
+ * We can't currently support out-of-line toasted group lists in
+ * startup mode (the tuptoaster won't work). This sucks, but it
+ * should be something of a corner case. Live with it until we
+ * can redesign pg_group.
+ *
+ * Detect startup mode by noting whether we got a tupdesc.
+ */
+ if (VARATT_IS_EXTERNAL(DatumGetPointer(datum)) &&
+ RelationGetDescr(grel) == NULL)
continue;
/* be sure the IdList is not toasted */
- grolist_p = DatumGetIdListP(grolist_datum);
+ grolist_p = DatumGetIdListP(datum);
- /* scan grolist */
- num = IDLIST_NUM(grolist_p);
+ /*
+ * The file format is: "groupname" usesysid1 usesysid2 ...
+ *
+ * We ignore groups that have no members.
+ */
aidp = IDLIST_DAT(grolist_p);
- for (i = 0; i < num; ++i)
+ num = IDLIST_NUM(grolist_p);
+ if (num > 0)
{
- tuple = SearchSysCache(SHADOWSYSID,
- PointerGetDatum(aidp[i]),
- 0, 0, 0);
- if (HeapTupleIsValid(tuple))
- {
- usename = NameStr(((Form_pg_shadow) GETSTRUCT(tuple))->usename);
-
- /*
- * Check for illegal characters in the user name.
- */
- if (!name_okay(usename))
- {
- ereport(LOG,
- (errmsg("invalid user name \"%s\"", usename)));
- continue;
- }
-
- /*
- * File format is: "groupname" "user1" "user2" "user3"
- */
- if (first_user)
- {
- fputs_quote(groname, fp);
- fputs("\t", fp);
- first_user = false;
- }
- else
- fputs(" ", fp);
-
- fputs_quote(usename, fp);
-
- ReleaseSysCache(tuple);
- }
- }
- if (!first_user)
+ fputs_quote(groname, fp);
+ fprintf(fp, "\t%u", aidp[0]);
+ for (i = 1; i < num; ++i)
+ fprintf(fp, " %u", aidp[i]);
fputs("\n", fp);
+ }
+
/* if IdList was toasted, free detoasted copy */
- if ((Pointer) grolist_p != DatumGetPointer(grolist_datum))
+ if ((Pointer) grolist_p != DatumGetPointer(datum))
pfree(grolist_p);
}
heap_endscan(scan);
char *usename,
*passwd,
*valuntil;
+ AclId usesysid;
usename = NameStr(pwform->usename);
+ usesysid = pwform->usesysid;
/*
* We can't use heap_getattr() here because during startup we will
if (HeapTupleHasNulls(tuple) &&
att_isnull(Anum_pg_shadow_passwd - 1, bp))
{
- /*
- * It can be argued that people having a null password shouldn't
- * be allowed to connect under password authentication, because
- * they need to have a password set up first. If you think
- * assuming an empty password in that case is better, change this
- * logic to look something like the code for valuntil.
- */
- continue;
+ /* passwd is null, emit as an empty string */
+ passwd = pstrdup("");
}
+ else
+ {
+ /* assume passwd is pass-by-ref */
+ datum = PointerGetDatum(tp + off);
- /* assume passwd is pass-by-ref */
- datum = PointerGetDatum(tp + off);
-
- /*
- * The password probably shouldn't ever be out-of-line toasted;
- * if it is, ignore it, since we can't handle that in startup mode.
- */
- if (VARATT_IS_EXTERNAL(DatumGetPointer(datum)))
- continue;
-
- passwd = DatumGetCString(DirectFunctionCall1(textout, datum));
+ /*
+ * The password probably shouldn't ever be out-of-line toasted;
+ * if it is, ignore it, since we can't handle that in startup mode.
+ */
+ if (VARATT_IS_EXTERNAL(DatumGetPointer(datum)))
+ passwd = pstrdup("");
+ else
+ passwd = DatumGetCString(DirectFunctionCall1(textout, datum));
- /* assume passwd has attlen -1 */
- off = att_addlength(off, -1, tp + off);
+ /* assume passwd has attlen -1 */
+ off = att_addlength(off, -1, tp + off);
+ }
if (HeapTupleHasNulls(tuple) &&
att_isnull(Anum_pg_shadow_valuntil - 1, bp))
continue;
}
+ /*
+ * The file format is: "usename" usesysid "passwd" "valuntil"
+ */
fputs_quote(usename, fp);
- fputs(" ", fp);
+ fprintf(fp, " %u ", usesysid);
fputs_quote(passwd, fp);
fputs(" ", fp);
fputs_quote(valuntil, fp);
if (!database_only)
{
-#ifdef NOT_YET
- /* XXX doesn't work yet for reasons stated above */
-
/* hard-wired path to pg_group */
rnode.spcNode = GLOBALTABLESPACE_OID;
rnode.dbNode = 0;
rel = XLogOpenRelation(true, 0, rnode);
write_group_file(rel);
-#endif
/* hard-wired path to pg_shadow */
rnode.spcNode = GLOBALTABLESPACE_OID;
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