/*
* Signal to terminate a backend process. Only allowed by superuser.
*/
Datum
pg_terminate_backend(PG_FUNCTION_ARGS)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
errmsg("must be superuser to terminate other server processes"),
errhint("You can cancel your own processes with pg_cancel_backend().")));
PG_RETURN_BOOL(pg_signal_backend(PG_GETARG_INT32(0), SIGTERM) == SIGNAL_BACKEND_SUCCESS);
}
/*
* Signal to cancel a backend process. This is allowed if you are superuser or
* have the same role as the process being canceled.
*/
Datum
pg_cancel_backend(PG_FUNCTION_ARGS)
{
int r = pg_signal_backend(PG_GETARG_INT32(0), SIGINT);
if (r == SIGNAL_BACKEND_NOPERMISSION)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be superuser or have the same role to cancel queries running in other server processes"))));
PG_RETURN_BOOL(r == SIGNAL_BACKEND_SUCCESS);
}
Datum
pg_cancel_backend_msg(PG_FUNCTION_ARGS)
{
pid_t pid = PG_GETARG_INT32(0);
char *msg = text_to_cstring(PG_GETARG_TEXT_PP(1));
int r = pg_signal_backend(pid, SIGINT, msg);
if (r == SIGNAL_BACKEND_NOPERMISSION)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be superuser or have the same role to cancel queries running in other server processes"))));
PG_RETURN_BOOL(r == SIGNAL_BACKEND_SUCCESS);
}
/*
* Signal to terminate a backend process. This is allowed if you are a member
* of the role whose process is being terminated.
*
* Note that only superusers can signal superuser-owned processes.
*/
Datum
pg_terminate_backend(PG_FUNCTION_ARGS)
{
int r = pg_signal_backend(PG_GETARG_INT32(0), SIGTERM);
if (r == SIGNAL_BACKEND_NOSUPERUSER)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be a superuser to terminate superuser process"))));
if (r == SIGNAL_BACKEND_NOPERMISSION)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(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);
}
/*
* Signal to cancel a backend process. This is allowed if you are a member of
* the role whose process is being canceled.
*
* Note that only superusers can signal superuser-owned processes.
*/
Datum
pg_cancel_backend(PG_FUNCTION_ARGS)
{
int r = pg_signal_backend(PG_GETARG_INT32(0), SIGINT);
if (r == SIGNAL_BACKEND_NOSUPERUSER)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("must be a superuser to cancel superuser query"))));
if (r == SIGNAL_BACKEND_NOPERMISSION)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(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);
}
Datum
pg_terminate_backend(PG_FUNCTION_ARGS)
{
PG_RETURN_BOOL(pg_signal_backend(PG_GETARG_INT32(0), SIGTERM));
}
Datum
pg_cancel_backend(PG_FUNCTION_ARGS)
{
PG_RETURN_BOOL(pg_signal_backend(PG_GETARG_INT32(0), SIGINT));
}
datum_t pg_cancel_backend(PG_FUNC_ARGS)
{
RET_BOOL(pg_signal_backend(ARG_INT32(0), SIGINT));
}
datum_t pg_terminate_backend(PG_FUNC_ARGS)
{
RET_BOOL(pg_signal_backend(ARG_INT32(0), SIGTERM));
}
