/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Copyright (C) 2012 Red Hat, Inc.
 */

#include "config.h"

#include <signal.h>

#include "nm-posix-signals.h"


/* Stores the original signal mask of NetworkManager process */
static sigset_t nm_original_signal_mask;

void
nm_save_original_signal_mask (sigset_t sig_mask)
{
	nm_original_signal_mask = sig_mask;
}

const sigset_t *
nm_get_original_signal_mask (void)
{
	return &nm_original_signal_mask;
}

/* 
 * Unblock signals.
 * If a signal set is passed, those signals are unblocked. If user_data is NULL
 * the process' signal mask is set to the saved original mask.
 * Note: This function can be used in g_spawn_* as GSpawnChildSetupFunc()
 *       callback.
 */
void
nm_unblock_posix_signals (gpointer user_data)
{
	sigset_t *user_sigset = (sigset_t *) user_data;

	if (user_sigset != NULL) {
		pthread_sigmask (SIG_UNBLOCK, user_sigset, NULL);
	} else {
		const sigset_t *orig_sig_mask = nm_get_original_signal_mask ();
		pthread_sigmask (SIG_SETMASK, orig_sig_mask, NULL);
	}
}