Re: [HACKERS] pg_user "sealed" - Mailing list pgsql-hackers

So here it is,

> >     So   if   the   relname   is   given   to   acldefault()   in
> >     utils/adt/acl.c, it can do a IsSystemRelationName() on it and
> >     return ACL_RD instead of ACL_WORLD_DEFAULT.
>
> Nice solution.

    There  might  only  be one problem left. The acl items output
    regproc too sets up a default entry  and  uses  this  if  the
    passed  in  aip  is  NULL. For types output regproc we cannot
    pass in the relation name because this  call  happens  trough
    the fmgr from somewhere else. I don't know if this could ever
    happen since the system would never produce an empty acl from
    inside  or  by the aclparse() input function. Might be a good
    thing to change aclitemout() for now to throw  an  elog()  if
    aip is NULL and look if this ever happens.


Jan

--

#======================================================================#
# It's easier to get forgiveness for being wrong than for being right. #
# Let's break this rule - forgive me.                                  #
#======================================== jwieck@debis.com (Jan Wieck) #


diff -c -r /usr/local/pgsql/sup/pgsql/src/backend/catalog/aclchk.c ./backend/catalog/aclchk.c
*** /usr/local/pgsql/sup/pgsql/src/backend/catalog/aclchk.c    Thu Feb 12 14:35:47 1998
--- ./backend/catalog/aclchk.c    Mon Feb 23 22:27:24 1998
***************
*** 39,45 ****
  #include "utils/tqual.h"
  #include "fmgr.h"

! static int32 aclcheck(Acl *acl, AclId id, AclIdType idtype, AclMode mode);

  /*
   * Enable use of user relations in place of real system catalogs.
--- 39,45 ----
  #include "utils/tqual.h"
  #include "fmgr.h"

! static int32 aclcheck(char *relname, Acl *acl, AclId id, AclIdType idtype, AclMode mode);

  /*
   * Enable use of user relations in place of real system catalogs.
***************
*** 150,156 ****
          elog(DEBUG, "ChangeAcl: using default ACL");
  #endif
  /*        old_acl = acldefault(((Form_pg_class) GETSTRUCT(htp))->relowner); */
!         old_acl = acldefault();
          free_old_acl = 1;
      }

--- 150,156 ----
          elog(DEBUG, "ChangeAcl: using default ACL");
  #endif
  /*        old_acl = acldefault(((Form_pg_class) GETSTRUCT(htp))->relowner); */
!         old_acl = acldefault(relname);
          free_old_acl = 1;
      }

***************
*** 281,287 ****
   * any one of the requirements of 'mode'.  Returns 0 otherwise.
   */
  static int32
! aclcheck(Acl *acl, AclId id, AclIdType idtype, AclMode mode)
  {
      unsigned i;
      AclItem *aip,
--- 281,287 ----
   * any one of the requirements of 'mode'.  Returns 0 otherwise.
   */
  static int32
! aclcheck(char *relname, Acl *acl, AclId id, AclIdType idtype, AclMode mode)
  {
      unsigned i;
      AclItem *aip,
***************
*** 292,298 ****
      /* if no acl is found, use world default */
      if (!acl)
      {
!         acl = acldefault();
      }

      num = ACL_NUM(acl);
--- 292,298 ----
      /* if no acl is found, use world default */
      if (!acl)
      {
!         acl = acldefault(relname);
      }

      num = ACL_NUM(acl);
***************
*** 475,481 ****
                                       Anum_pg_class_relowner,
                                       RelationGetTupleDescriptor(relation),
                                       (bool *) NULL);
!         acl = aclownerdefault(ownerId);
      }
  #else
      {                            /* This is why the syscache is great... */
--- 475,481 ----
                                       Anum_pg_class_relowner,
                                       RelationGetTupleDescriptor(relation),
                                       (bool *) NULL);
!         acl = aclownerdefault(relname, ownerId);
      }
  #else
      {                            /* This is why the syscache is great... */
***************
*** 511,517 ****
          heap_close(relation);
      }
  #endif
!     result = aclcheck(acl, id, (AclIdType) ACL_IDTYPE_UID, mode);
      if (acl)
          pfree(acl);
      return (result);
--- 511,517 ----
          heap_close(relation);
      }
  #endif
!     result = aclcheck(relname, acl, id, (AclIdType) ACL_IDTYPE_UID, mode);
      if (acl)
          pfree(acl);
      return (result);
diff -c -r /usr/local/pgsql/sup/pgsql/src/backend/utils/adt/acl.c ./backend/utils/adt/acl.c
*** /usr/local/pgsql/sup/pgsql/src/backend/utils/adt/acl.c    Thu Feb 12 14:36:19 1998
--- ./backend/utils/adt/acl.c    Mon Feb 23 22:32:56 1998
***************
*** 18,23 ****
--- 18,24 ----
  #include <utils/memutils.h>
  #include "utils/acl.h"
  #include "utils/syscache.h"
+ #include "catalog/catalog.h"
  #include "catalog/pg_user.h"
  #include "miscadmin.h"

***************
*** 342,348 ****
  }

  Acl           *
! aclownerdefault(AclId ownerid)
  {
      Acl           *acl;
      AclItem    *aip;
--- 343,349 ----
  }

  Acl           *
! aclownerdefault(char *relname, AclId ownerid)
  {
      Acl           *acl;
      AclItem    *aip;
***************
*** 351,357 ****
      aip = ACL_DAT(acl);
      aip[0].ai_idtype = ACL_IDTYPE_WORLD;
      aip[0].ai_id = ACL_ID_WORLD;
!     aip[0].ai_mode = ACL_WORLD_DEFAULT;
      aip[1].ai_idtype = ACL_IDTYPE_UID;
      aip[1].ai_id = ownerid;
      aip[1].ai_mode = ACL_OWNER_DEFAULT;
--- 352,358 ----
      aip = ACL_DAT(acl);
      aip[0].ai_idtype = ACL_IDTYPE_WORLD;
      aip[0].ai_id = ACL_ID_WORLD;
!     aip[0].ai_mode = IsSystemRelationName(relname) ? ACL_RD : ACL_WORLD_DEFAULT;
      aip[1].ai_idtype = ACL_IDTYPE_UID;
      aip[1].ai_id = ownerid;
      aip[1].ai_mode = ACL_OWNER_DEFAULT;
***************
*** 359,365 ****
  }

  Acl           *
! acldefault(void)
  {
      Acl           *acl;
      AclItem    *aip;
--- 360,366 ----
  }

  Acl           *
! acldefault(char *relname)
  {
      Acl           *acl;
      AclItem    *aip;
***************
*** 368,374 ****
      aip = ACL_DAT(acl);
      aip[0].ai_idtype = ACL_IDTYPE_WORLD;
      aip[0].ai_id = ACL_ID_WORLD;
!     aip[0].ai_mode = ACL_WORLD_DEFAULT;
      return (acl);
  }

--- 369,375 ----
      aip = ACL_DAT(acl);
      aip[0].ai_idtype = ACL_IDTYPE_WORLD;
      aip[0].ai_id = ACL_ID_WORLD;
!     aip[0].ai_mode = IsSystemRelationName(relname) ? ACL_RD : ACL_WORLD_DEFAULT;
      return (acl);
  }

diff -c -r /usr/local/pgsql/sup/pgsql/src/include/utils/acl.h ./include/utils/acl.h
*** /usr/local/pgsql/sup/pgsql/src/include/utils/acl.h    Mon Feb 23 20:42:08 1998
--- ./include/utils/acl.h    Mon Feb 23 22:25:47 1998
***************
*** 135,142 ****
  /*
   * routines used internally (parser, etc.)
   */
! extern Acl *aclownerdefault(AclId ownerid);
! extern Acl *acldefault(void);
  extern Acl *aclinsert3(Acl *old_acl, AclItem *mod_aip, unsigned modechg);

  extern char *aclmakepriv(char *old_privlist, char new_priv);
--- 135,142 ----
  /*
   * routines used internally (parser, etc.)
   */
! extern Acl *aclownerdefault(char *relname, AclId ownerid);
! extern Acl *acldefault(char *relname);
  extern Acl *aclinsert3(Acl *old_acl, AclItem *mod_aip, unsigned modechg);

  extern char *aclmakepriv(char *old_privlist, char new_priv);