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Use GRANT system to manage access to sensitive functions

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Now that pg_dump will properly dump out any ACL changes made to
functions which exist in pg_catalog, switch to using the GRANT system
to manage access to those functions.

This means removing 'if (!superuser()) ereport()' checks from the
functions themselves and then REVOKEing EXECUTE right from 'public' for
these functions in system_views.sql.

Reviews by Alexander Korotkov, Jose Luis Tallon
This commit is contained in:
Stephen Frost
2016-04-06 21:45:32 -04:00
parent 23f34fa4ba
commit 1574783b4c
7 changed files with 81 additions and 75 deletions
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16
src/backend/utils/adt/misc.c
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@ -321,15 +321,13 @@ pg_terminate_backend(PG_FUNCTION_ARGS)
/*
* Signal to reload the database configuration
*
* Permission checking for this function is managed through the normal
* GRANT system.
*/
Datum
pg_reload_conf(PG_FUNCTION_ARGS)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be superuser to signal the postmaster"))));
if (kill(PostmasterPid, SIGHUP))
{
ereport(WARNING,
@ -343,15 +341,13 @@ pg_reload_conf(PG_FUNCTION_ARGS)
/*
* Rotate log file
*
* Permission checking for this function is managed through the normal
* GRANT system.
*/
Datum
pg_rotate_logfile(PG_FUNCTION_ARGS)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be superuser to rotate log files"))));
if (!Logging_collector)
{
ereport(WARNING,