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Create default roles

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This creates an initial set of default roles which administrators may
use to grant access to, historically, superuser-only functions.  Using
these roles instead of granting superuser access reduces the number of
superuser roles required for a system.  Documention for each of the
default roles has been added to user-manag.sgml.

Bump catversion to 201604082, as we had a commit that bumped it to
201604081 and another that set it back to 201604071...

Reviews by José Luis Tallón and Robert Haas
This commit is contained in:
Stephen Frost
2016-04-08 16:56:27 -04:00
parent 293007898d
commit 7a542700df
7 changed files with 76 additions and 8 deletions
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8
src/backend/utils/adt/misc.c
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@ -21,6 +21,7 @@
#include <unistd.h>
#include "access/sysattr.h"
#include "catalog/pg_authid.h"
#include "catalog/catalog.h"
#include "catalog/pg_tablespace.h"
#include "catalog/pg_type.h"
@ -244,7 +245,8 @@ pg_signal_backend(int pid, int sig)
return SIGNAL_BACKEND_NOSUPERUSER;
/* Users can signal backends they have role membership in. */
if (!has_privs_of_role(GetUserId(), proc->roleId))
if (!has_privs_of_role(GetUserId(), proc->roleId) &&
!has_privs_of_role(GetUserId(), DEFAULT_ROLE_SIGNAL_BACKENDID))
return SIGNAL_BACKEND_NOPERMISSION;
/*
@ -290,7 +292,7 @@ pg_cancel_backend(PG_FUNCTION_ARGS)
if (r == SIGNAL_BACKEND_NOPERMISSION)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be a member of the role whose query is being canceled"))));
(errmsg("must be a member of the role whose query is being canceled or member of pg_signal_backend"))));
PG_RETURN_BOOL(r == SIGNAL_BACKEND_SUCCESS);
}
@ -314,7 +316,7 @@ pg_terminate_backend(PG_FUNCTION_ARGS)
if (r == SIGNAL_BACKEND_NOPERMISSION)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be a member of the role whose process is being terminated"))));
(errmsg("must be a member of the role whose process is being terminated or member of pg_signal_backend"))));
PG_RETURN_BOOL(r == SIGNAL_BACKEND_SUCCESS);
}