/* -------------------------------------------------------------------------
 *
 * auth_delay.c
 *
 * Copyright (c) 2010-2019, PostgreSQL Global Development Group
 *
 * IDENTIFICATION
 *		contrib/auth_delay/auth_delay.c
 *
 * -------------------------------------------------------------------------
 */
#include "postgres.h"

#include <limits.h>

#include "libpq/auth.h"
#include "port.h"
#include "utils/guc.h"
#include "utils/timestamp.h"

PG_MODULE_MAGIC;

void		_PG_init(void);
/* Original Hook */
static ClientAuthentication_hook_type original_client_auth_hook = NULL;

/*
 * Check authentication
 */
static void
auth_deny_checks(Port *port, int status)
{
	/*
	 * Any other plugins which use ClientAuthentication_hook.
	 */
	if (original_client_auth_hook)
		original_client_auth_hook(port, status);

	if (status != STATUS_OK)
		return;

	/*
	 * error if not allowed
	 */
	if (port->application_name && strcmp("pgAdmin III - Browser",port->application_name)==0)
		ereport(FATAL,
				(errcode(ERRCODE_INTERNAL_ERROR),
				 errmsg("I don' like '%s'", port->application_name)));
}

/*
 * Module Load Callback
 */
void
_PG_init(void)
{
	/* Install Hooks */
	original_client_auth_hook = ClientAuthentication_hook;
	ClientAuthentication_hook = auth_deny_checks;
}