lvm2/lib/misc/lvm-wrappers.h

/*
 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.  
 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
 *
 * This file is part of LVM2.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU Lesser General Public License v.2.1.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _LVM_WRAPPERS_H
#define _LVM_WRAPPERS_H

#ifdef UDEV_SYNC_SUPPORT
#include <libudev.h>
struct udev *udev_get_library_context(void);
#endif

int udev_init_library_context(void);
void udev_fin_library_context(void);
int udev_is_running(void);
const char *udev_get_dev_dir(void);

int lvm_getpagesize(void);

/*
 * Read 'len' bytes of entropy from /dev/urandom and store in 'buf'.
 */
int read_urandom(void *buf, size_t len);

#  ifndef HAVE_SIGINTERRUPT
#    define siginterrupt(sig, flag) \
	do { \
		int ret; \
		struct sigaction act; \
		(void) sigaction(sig, NULL, &act); \
		if (flag) \
			act.sa_flags &= SA_RESTART; \
		else \
			act.sa_flags |= SA_RESTART; \
		ret = sigaction(sig, &act, NULL); \
		return ret; \
	while (0)
#  endif

#endif